/* roulang page: index */
:root{
  --ink-900:#17140F;
  --ink-700:#3A342C;
  --ink-500:#6B6355;
  --paper:#F6F1E7;
  --paper-2:#FBF8F2;
  --line:#E2D9C9;
  --brand:#BF4B22;
  --brand-700:#9E3A17;
  --brand-soft:#F3E1D5;
  --accent:#2E4A3D;
  --accent-soft:#DDE6DF;
  --night:#14110E;
  --night-2:#1D1915;
  --on-night:#F1E9DC;
  --on-night-dim:#A79C8B;
  --success:#3F7A55;
  --warning:#B8862A;
  --error:#B33A2B;
  --line-night:rgba(241,233,220,.14);
  --r-card:4px;
  --r-btn:2px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(23,20,15,.04),0 8px 24px -12px rgba(23,20,15,.10);
  --shadow-2:0 12px 36px -16px rgba(23,20,15,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --t:220ms var(--ease);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-700);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
::selection{background:var(--brand-soft);color:var(--ink-900)}

.serif{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif}
.num{font-family:Inter,"Helvetica Neue",Arial,sans-serif;font-variant-numeric:tabular-nums}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:clamp(20px,4vw,40px);padding-right:clamp(20px,4vw,40px)}
@media (min-width:1440px){.container{max-width:1280px}}

.grain{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.04;
  background-image:radial-gradient(rgba(23,20,15,.55) .5px,transparent .5px);
  background-size:3px 3px;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  will-change:transform;
}
.btn-primary{background:var(--brand);color:var(--paper-2);border:1px solid var(--brand)}
.btn-primary:hover{background:var(--brand-700);border-color:var(--brand-700);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:transparent;color:var(--ink-900);border:1px solid var(--ink-900)}
.btn-outline:hover{background:var(--ink-900);color:var(--paper-2)}
.btn-outline:active{transform:translateY(1px)}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;color:var(--brand);
  font-size:14px;font-weight:600;transition:color var(--t);
}
.link-arrow .arw{transition:transform var(--t)}
.link-arrow:hover{color:var(--brand-700)}
.link-arrow:hover .arw{transform:translateX(4px)}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  background:var(--accent-soft);color:var(--accent);
  font-size:12px;letter-spacing:.08em;line-height:1.6;white-space:nowrap;
}
.tag-brand{background:var(--brand-soft);color:var(--brand-700)}
.tag-ghost{background:transparent;border:1px solid var(--line);color:var(--ink-500)}
.eyebrow{font-size:12px;letter-spacing:.16em;color:var(--ink-500);text-transform:uppercase}

/* ---------- topbar ---------- */
.topbar{background:var(--night);color:var(--on-night-dim);font-size:13px}
.topbar .container{display:flex;align-items:center;justify-content:space-between;height:34px;gap:16px}
.topbar-left{display:flex;align-items:center;gap:10px;overflow:hidden;white-space:nowrap}
.topbar-left span{display:inline-flex;align-items:center;gap:8px}
.topbar-left i{width:5px;height:5px;border-radius:50%;background:var(--brand);display:inline-block}
.topbar a{color:var(--on-night);border-bottom:1px solid transparent;transition:border-color var(--t),color var(--t)}
.topbar a:hover{border-bottom-color:var(--brand)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,241,231,.92);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t),background var(--t);
}
.site-header.is-stuck{box-shadow:var(--shadow-1)}
.header-inner{display:flex;align-items:center;gap:28px;height:76px;transition:height var(--t)}
.site-header.is-stuck .header-inner{height:66px}
.logo{display:flex;align-items:center;gap:14px;flex-shrink:0}
.logo-text{
  font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  font-size:22px;font-weight:700;color:var(--ink-900);letter-spacing:.02em;line-height:1.2;
}
.logo-sub{
  padding-left:14px;border-left:1px solid var(--line);
  font-size:12px;line-height:1.5;color:var(--ink-500);letter-spacing:.04em;
}
.site-nav{margin-left:auto}
.site-nav ul{display:flex;align-items:center;gap:28px}
.site-nav a{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;color:var(--ink-700);transition:color var(--t);
}
.site-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.site-nav a:hover{color:var(--ink-900)}
.site-nav a:hover::after,.site-nav a.is-active::after{transform:scaleX(1)}
.site-nav a.is-active{color:var(--ink-900);font-weight:600}
.header-cta{flex-shrink:0}
.header-cta .btn{height:42px;padding:0 22px;font-size:14px}

.burger{display:none;width:44px;height:44px;align-items:center;justify-content:center;margin-left:auto;border-radius:var(--r-btn)}
.burger span{position:relative;display:block;width:22px;height:2px;background:var(--ink-900);transition:transform var(--t),background var(--t)}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:22px;height:2px;background:var(--ink-900);transition:transform var(--t),opacity var(--t);
}
.burger span::before{top:-7px}
.burger span::after{top:7px}
body.drawer-open .burger span{background:transparent}
body.drawer-open .burger span::before{transform:translateY(7px) rotate(45deg);background:var(--on-night)}
body.drawer-open .burger span::after{transform:translateY(-7px) rotate(-45deg);background:var(--on-night)}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;inset:0;z-index:55;background:var(--night);color:var(--on-night);
  padding:96px clamp(20px,6vw,44px) 32px;
  display:flex;flex-direction:column;
  opacity:0;visibility:hidden;transform:translateY(-12px);
  transition:opacity var(--t),transform var(--t),visibility var(--t);
}
body.drawer-open .drawer{opacity:1;visibility:visible;transform:translateY(0)}
.drawer-nav ul{display:flex;flex-direction:column;gap:6px}
.drawer-nav a{
  display:block;padding:12px 0;font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  font-size:26px;color:var(--on-night);border-bottom:1px solid var(--line-night);
  opacity:0;transform:translateY(14px);transition:opacity .4s var(--ease),transform .4s var(--ease),color var(--t);
}
.drawer-nav a:hover{color:var(--brand-soft)}
body.drawer-open .drawer-nav a{opacity:1;transform:translateY(0)}
body.drawer-open .drawer-nav li:nth-child(1) a{transition-delay:.04s}
body.drawer-open .drawer-nav li:nth-child(2) a{transition-delay:.08s}
body.drawer-open .drawer-nav li:nth-child(3) a{transition-delay:.12s}
body.drawer-open .drawer-nav li:nth-child(4) a{transition-delay:.16s}
body.drawer-open .drawer-nav li:nth-child(5) a{transition-delay:.2s}
body.drawer-open .drawer-nav li:nth-child(6) a{transition-delay:.24s}
.drawer-foot{margin-top:auto;padding-top:28px;display:grid;gap:10px}
.drawer-foot .btn{width:100%}
.drawer-foot .btn-outline{border-color:var(--on-night-dim);color:var(--on-night)}
.drawer-foot .btn-outline:hover{background:var(--on-night);color:var(--night)}
.drawer-note{font-size:12px;color:var(--on-night-dim);letter-spacing:.04em;margin-top:8px}

/* ---------- hero ---------- */
.hero{position:relative;padding:clamp(48px,7vw,88px) 0 clamp(40px,6vw,72px);overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-120px;right:-60px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,var(--brand) 0%,transparent 70%);opacity:.12;pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:clamp(32px,5vw,64px);align-items:center}
.hero-title{
  font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  font-size:clamp(32px,5.2vw,64px);font-weight:700;line-height:1.12;letter-spacing:-.01em;color:var(--ink-900);
  margin-top:18px;
}
.hero-title .line-2{display:block;color:var(--ink-900)}
.hero-title .accent{color:var(--brand)}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.85;color:var(--ink-500);max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:0;margin-top:40px;padding-top:22px;border-top:1px solid var(--line)}
.hero-metrics li{display:flex;flex-direction:column;gap:2px;padding-right:26px;margin-right:26px;border-right:1px solid var(--line);font-size:13px;color:var(--ink-500);line-height:1.6}
.hero-metrics li:last-child{border-right:0;padding-right:0;margin-right:0}
.hero-metrics b{font-family:Inter,Arial,sans-serif;font-size:20px;color:var(--ink-900);font-variant-numeric:tabular-nums}
.hero-visual{position:relative;max-width:380px;width:100%;justify-self:end}
.hero-visual::before{
  content:"";position:absolute;inset:12px -12px -12px 12px;border:1px solid var(--brand);
  border-radius:2px;pointer-events:none;z-index:0;
}
.hero-frame{position:relative;z-index:1;aspect-ratio:9/16;border-radius:var(--r-card);overflow:hidden;background:var(--night-2);box-shadow:var(--shadow-2)}
.hero-frame img{width:100%;height:100%;object-fit:cover}
.hero-frame::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(20,17,14,.62),rgba(20,17,14,0) 48%);z-index:2}
.hero-badge{
  position:absolute;left:16px;bottom:16px;z-index:3;
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  background:rgba(241,233,220,.14);color:var(--on-night);
  border:1px solid var(--line-night);font-size:12px;letter-spacing:.08em;
  backdrop-filter:blur(4px);
}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-title{
  font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  font-size:clamp(26px,3.4vw,40px);line-height:1.2;font-weight:700;color:var(--ink-900);letter-spacing:-.005em;
}
.section-desc{margin-top:16px;font-size:15px;color:var(--ink-500);max-width:36em;line-height:1.85}

/* ---------- numbered service list ---------- */
.biz-grid{display:grid;grid-template-columns:4fr 8fr;gap:clamp(28px,4vw,56px);align-items:start}
.biz-aside{position:sticky;top:110px}
.biz-list{border-top:1px solid var(--line)}
.biz-item{
  display:grid;grid-template-columns:64px 1fr 32px;gap:16px;align-items:center;
  padding:26px 8px 26px 0;border-bottom:1px solid var(--line);
  transition:padding-left var(--t),background var(--t);
}
.biz-item:hover{padding-left:8px;background:var(--paper-2)}
.biz-num{
  font-family:"Noto Serif SC","Source Han Serif SC",Georgia,serif;font-style:italic;
  font-size:22px;color:var(--brand);border:1px solid var(--brand);border-radius:var(--r-pill);
  width:52px;height:52px;display:flex;align-items:center;justify-content:center;
  transition:background var(--t),color var(--t);
}
.biz-item:hover .biz-num{background:var(--brand);color:var(--paper-2)}
.biz-title{font-size:20px;font-weight:600;color:var(--ink-900);line-height:1.4;font-family:"Noto Serif SC","Source Han Serif SC",serif}
.biz-text{margin-top:6px;font-size:14px;color:var(--ink-500);line-height:1.8}
.biz-arrow{font-size:18px;color:var(--ink-500);transition:transform var(--t),color var(--t);text-align:right}
.biz-item:hover .biz-arrow{transform:translateX(4px);color:var(--brand)}
.biz-figure{margin:18px 0 6px;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line)}
.biz-figure img{width:100%;aspect-ratio:16/6;object-fit:cover}

/* ---------- dark stats ---------- */
.stats{background:var(--night);color:var(--on-night);padding:80px 0;position:relative;overflow:hidden}
.stats::before{
  content:"";position:absolute;top:-160px;left:50%;transform:translateX(-50%);
  width:640px;height:320px;border-radius:50%;
  background:radial-gradient(ellipse,var(--brand) 0%,transparent 68%);opacity:.16;pointer-events:none;
}
.stats-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:48px;position:relative}
.stats-head h2{font-family:"Noto Serif SC","Source Han Serif SC",serif;font-size:clamp(26px,3.4vw,40px);line-height:1.2;color:var(--on-night);font-weight:700}
.stats-head p{font-size:14px;color:var(--on-night-dim);max-width:26em;line-height:1.8}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);position:relative}
.stat{padding:0 28px;border-left:1px solid var(--line-night)}
.stat:first-child{border-left:0;padding-left:0}
.stat b{
  display:block;font-family:Inter,Arial,sans-serif;font-size:clamp(38px,4.4vw,54px);line-height:1;
  color:var(--on-night);font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.stat b small{font-size:16px;color:var(--on-night-dim);margin-left:4px;letter-spacing:0}
.stat span{display:block;margin-top:12px;font-size:13px;color:var(--on-night-dim);line-height:1.7}
.stats-keys{display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:56px;padding-top:24px;border-top:1px solid var(--line-night);position:relative}
.stats-keys li{font-size:12px;letter-spacing:.12em;color:var(--on-night-dim)}

/* ---------- matrix ---------- */
.pills{display:flex;flex-wrap:wrap;gap:10px}
.pill{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--paper-2);color:var(--ink-500);
  font-size:13px;transition:border-color var(--t),color var(--t),background var(--t);
}
.pill:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.matrix{display:grid;grid-template-columns:7fr 5fr;gap:24px}
.matrix-col{display:grid;gap:24px;align-content:start}
.drama-card{
  position:relative;display:block;overflow:hidden;border-radius:var(--r-card);
  border:1px solid var(--line);background:var(--night-2);
  transition:border-color var(--t),box-shadow var(--t),transform var(--t);
}
.drama-card img{width:100%;height:100%;object-fit:cover;transition:transform 600ms var(--ease)}
.drama-card:hover{border-color:var(--brand);box-shadow:var(--shadow-2)}
.drama-card:hover img{transform:scale(1.03)}
.drama-card .veil{
  position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;
  padding:24px;color:var(--on-night);
  background:linear-gradient(to top,rgba(20,17,14,.86) 0%,rgba(20,17,14,.25) 48%,rgba(20,17,14,0) 78%);
  transition:transform var(--t);
}
.drama-card:hover .veil{transform:translateY(-6px)}
.drama-card.big img{aspect-ratio:16/10}
.drama-card.small img{aspect-ratio:4/3}
.drama-name{font-family:"Noto Serif SC","Source Han Serif SC",serif;font-size:22px;font-weight:700;line-height:1.35;color:var(--on-night)}
.drama-note{margin-top:8px;font-size:13px;color:var(--on-night-dim);line-height:1.7}
.drama-meta{display:flex;align-items:center;gap:10px;margin-top:14px;flex-wrap:wrap}

/* ---------- plan ---------- */
.plans{display:grid;grid-template-columns:1fr 1fr;gap:0;position:relative;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--paper-2)}
.plan{padding:clamp(26px,3vw,38px);display:flex;flex-direction:column}
.plan + .plan{border-left:1px dashed var(--line)}
.plan h3{font-family:"Noto Serif SC","Source Han Serif SC",serif;font-size:24px;color:var(--ink-900);margin-top:16px;line-height:1.35}
.plan .plan-sub{margin-top:10px;font-size:14px;color:var(--ink-500);line-height:1.8}
.plan ul{margin-top:22px;display:grid;gap:12px}
.plan li{display:flex;gap:10px;font-size:14px;line-height:1.75;color:var(--ink-700)}
.plan li svg{flex-shrink:0;margin-top:5px}
.plan .btn{margin-top:28px;align-self:flex-start}
.custom-strip{
  margin-top:24px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  min-height:88px;padding:20px 28px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--paper);transition:border-color var(--t),background var(--t);
}
.custom-strip:hover{border-color:var(--brand);background:var(--paper-2)}
.custom-strip h3{font-family:"Noto Serif SC","Source Han Serif SC",serif;font-size:19px;color:var(--ink-900)}
.custom-strip p{font-size:14px;color:var(--ink-500);margin-top:4px;line-height:1.7}

/* ---------- news ---------- */
.news-wrap{border-top:1px solid var(--line);padding-top:32px}
.news-list{display:grid;grid-template-columns:5fr 7fr;gap:32px;align-items:start}
.news-lead{position:relative;border:1px solid var(--line);border-radius:var(--r-card);background:var(--paper-2);padding:clamp(22px,3vw,32px);transition:border-color var(--t),box-shadow var(--t)}
.news-lead:hover{border-color:var(--brand);box-shadow:var(--shadow-1)}
.news-hit{position:absolute;inset:0;z-index:2;border-radius:var(--r-card)}
.news-lead .news-title{font-family:"Noto Serif SC","Source Han Serif SC",serif;font-size:24px;line-height:1.4;color:var(--ink-900)}
.news-excerpt{margin-top:14px;font-size:14px;line-height:1.85;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:14px;margin-top:22px;flex-wrap:wrap}
.news-meta time{font-size:13px;color:var(--ink-500);font-variant-numeric:tabular-nums}
.news-rows{border-top:1px solid var(--line)}
.news-row{position:relative;display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;padding:20px 12px 20px 0;border-bottom:1px solid var(--line);transition:background var(--t),padding-left var(--t)}
.news-row:hover{background:var(--paper-2);padding-left:12px}
.news-row-title{font-size:17px;line-height:1.6;color:var(--ink-900);font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-row-time{font-size:13px;color:var(--ink-500);font-variant-numeric:tabular-nums;white-space:nowrap}
.news-empty{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  min-height:200px;max-height:240px;padding:48px 24px;border:1px dashed var(--line);border-radius:var(--r-card);
  color:var(--ink-500);font-size:14px;text-align:center;background:var(--paper-2);
}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:clamp(28px,4vw,56px);align-items:start}
.faq-aside{position:sticky;top:110px}
.faq-card{margin-top:28px;padding:22px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--paper-2)}
.faq-card .eyebrow{display:block;margin-bottom:8px}
.faq-card strong{display:block;font-family:"Noto Serif SC","Source Han Serif SC",serif;font-size:18px;color:var(--ink-900)}
.faq-card p{font-size:13px;color:var(--ink-500);margin-top:8px;line-height:1.75}
.faq-card .link-arrow{margin-top:14px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%;
  min-height:64px;padding:16px 0;text-align:left;
  font-size:17px;font-weight:600;color:var(--ink-900);line-height:1.6;
  transition:color var(--t);
}
.faq-q:hover{color:var(--brand)}
.faq-q .plus{position:relative;flex-shrink:0;width:18px;height:18px;transition:transform var(--t)}
.faq-q .plus::before,.faq-q .plus::after{content:"";position:absolute;background:var(--brand);border-radius:1px}
.faq-q .plus::before{left:0;top:8px;width:18px;height:1.5px}
.faq-q .plus::after{left:8px;top:0;width:1.5px;height:18px}
.faq-item.is-open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease)}
.faq-a p{padding:0 0 22px;font-size:15px;line-height:1.9;color:var(--ink-500);max-width:52em}
.faq-item.is-open .faq-a{max-height:340px}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:5fr 7fr;gap:clamp(28px,4vw,56px);align-items:start}
.info-list{display:grid;gap:22px;margin-top:32px}
.info-item{border-bottom:1px solid var(--line);padding-bottom:18px}
.info-item dt{font-size:13px;color:var(--ink-500);letter-spacing:.04em}
.info-item dd{margin:6px 0 0;font-size:15px;color:var(--ink-900);line-height:1.7;font-weight:500}
.form-card{border:1px solid var(--line);border-radius:var(--r-card);background:var(--paper-2);padding:clamp(22px,3vw,32px);box-shadow:var(--shadow-1)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:16px}
.field label{font-size:13px;color:var(--ink-700);letter-spacing:.04em}
.field input,.field select,.field textarea{
  height:48px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--paper);color:var(--ink-900);font-size:15px;width:100%;
  transition:border-color var(--t),box-shadow var(--t),background var(--t);
}
.field textarea{height:auto;min-height:112px;padding:12px 14px;line-height:1.8;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:var(--paper-2);box-shadow:0 0 0 3px var(--brand-soft);
}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--error)}
.err-msg{display:none;font-size:13px;color:var(--error)}
.field.has-error .err-msg{display:block}
.form-note{font-size:12px;color:var(--ink-500);margin-top:12px;line-height:1.7}
.form-ok{
  display:none;margin-bottom:16px;padding:12px 16px;border-radius:var(--r-card);
  background:var(--accent-soft);color:var(--success);font-size:14px;border:1px solid var(--success);
}
.form-ok.is-on{display:block}

/* ---------- footer ---------- */
.site-footer{background:var(--night);color:var(--on-night);border-top:1px solid var(--line-night);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:clamp(24px,3vw,40px)}
.footer-brand .logo-text{color:var(--on-night);font-size:22px}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:var(--on-night-dim);max-width:24em}
.footer-social{display:flex;gap:12px;margin-top:20px}
.footer-social a{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line-night);border-radius:var(--r-pill);color:var(--on-night-dim);
  transition:border-color var(--t),color var(--t),transform var(--t);
}
.footer-social a:hover{border-color:var(--brand);color:var(--brand-soft);transform:translateY(-2px)}
.footer-col h4{font-size:13px;letter-spacing:.12em;color:var(--on-night);font-weight:600;margin-bottom:18px}
.footer-col ul{display:grid;gap:10px}
.footer-col a,.footer-col li{font-size:14px;color:var(--on-night-dim);line-height:1.8;transition:color var(--t)}
.footer-col a:hover{color:var(--on-night)}
.footer-bottom{
  margin-top:56px;padding:22px 0;border-top:1px solid var(--line-night);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--on-night-dim);
}
.footer-bottom nav{display:flex;gap:20px;flex-wrap:wrap}
.footer-bottom a:hover{color:var(--on-night)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease-out,transform .6s ease-out}
.reveal.is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  .site-nav ul{gap:20px}
  .site-nav a{font-size:14px}
  .biz-grid{gap:32px}
}
@media (max-width:992px){
  .site-nav,.header-cta{display:none}
  .burger{display:inline-flex}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{justify-self:start;max-width:100%;width:100%}
  .hero-visual::before{display:none}
  .hero-frame{aspect-ratio:16/10}
  .biz-grid,.matrix,.news-list,.faq-grid,.contact-grid{grid-template-columns:1fr}
  .biz-aside,.faq-aside{position:static}
  .stats-grid{grid-template-columns:repeat(2,1fr);row-gap:36px}
  .stat{border-left:1px solid var(--line-night);padding-left:24px}
  .stat:nth-child(3){border-left:0;padding-left:0}
  .plans{grid-template-columns:1fr}
  .plan + .plan{border-left:0;border-top:1px dashed var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section{padding:64px 0}
  .stats{padding:64px 0}
}
@media (max-width:768px){
  .topbar-left span:nth-child(2){display:none}
  .header-inner{height:66px}
  .logo-sub{display:none}
  .logo-text{font-size:19px}
  .hero-title{font-size:clamp(30px,7vw,44px)}
  .hero-sub{font-size:15px}
  .hero-actions .btn{width:100%}
  .hero-metrics{gap:14px 0}
  .hero-metrics li{padding-right:18px;margin-right:18px}
  .drama-card.big img{aspect-ratio:16/11}
  .news-row{grid-template-columns:1fr auto;gap:8px 12px}
  .news-row .tag{gird-column:1/-1;justify-self:start;grid-column:1/-1}
  .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .section{padding:56px 0}
  .biz-item{grid-template-columns:48px 1fr;gap:12px}
  .biz-arrow{display:none}
  .biz-num{width:42px;height:42px;font-size:18px}
  .stats-grid{grid-template-columns:1fr}
  .stat{border-left:0;padding-left:0;border-top:1px solid var(--line-night);padding-top:20px}
  .stat:first-child{border-top:0;padding-top:0}
  .custom-strip{padding:20px}
  .custom-strip .btn{width:100%}
  .news-lead .news-title{font-size:20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink-900:#17140F;
  --ink-700:#3A342C;
  --ink-500:#6B6355;
  --paper:#F6F1E7;
  --paper-2:#FBF8F2;
  --line:#E2D9C9;
  --brand:#BF4B22;
  --brand-700:#9E3A17;
  --brand-soft:#F3E1D5;
  --accent:#2E4A3D;
  --accent-soft:#DDE6DF;
  --night:#14110E;
  --night-2:#1D1915;
  --on-night:#F1E9DC;
  --on-night-dim:#A79C8B;
  --success:#3F7A55;
  --warning:#B8862A;
  --error:#B33A2B;
  --radius-card:4px;
  --radius-btn:2px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(23,20,15,.04),0 8px 24px -12px rgba(23,20,15,.10);
  --shadow-2:0 12px 36px -16px rgba(23,20,15,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --container:1200px;
  --gutter:clamp(20px,4vw,40px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-700);
  background-color:var(--paper);
  background-image:radial-gradient(rgba(23,20,15,.035) .5px,transparent .5px);
  background-size:3px 3px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}
@media(min-width:1440px){:root{--container:1280px}}
.serif{font-family:var(--serif)}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--night);color:var(--on-night-dim);font-size:13px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:34px;flex-wrap:wrap}
.topbar-inner .topbar-note{letter-spacing:.02em}
.topbar-inner a{color:var(--on-night);display:inline-flex;align-items:center;gap:6px}
.topbar-inner a:hover{color:var(--brand)}

/* ---------- 主导航 ---------- */
.site-header{position:relative;z-index:70}
.nav-wrap{
  position:sticky;top:0;z-index:60;
  background:rgba(246,241,231,.92);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .28s var(--ease),background .28s var(--ease);
}
.nav-wrap.is-stuck{box-shadow:var(--shadow-1);background:rgba(251,248,242,.96)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:76px;transition:min-height .28s var(--ease)}
.nav-wrap.is-stuck .nav-inner{min-height:64px}
.brand{display:flex;align-items:center;gap:14px;flex-shrink:0}
.brand-name{font-family:var(--serif);font-size:21px;font-weight:700;color:var(--ink-900);letter-spacing:.01em;line-height:1.1}
.brand-sub{display:block;font-size:12px;color:var(--ink-500);letter-spacing:.06em;border-left:1px solid var(--line);padding-left:14px;line-height:1.4}
.brand:hover .brand-name{color:var(--brand)}
.site-nav ul{display:flex;align-items:center;gap:30px}
.site-nav a{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;color:var(--ink-700);letter-spacing:.01em;
}
.site-nav a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);
  transition:width .26s var(--ease);
}
.site-nav a:hover{color:var(--ink-900)}
.site-nav a:hover::after{width:100%}
.site-nav a.is-active{color:var(--ink-900);font-weight:600}
.site-nav a.is-active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);
}
.btn-primary{background:var(--brand);color:var(--paper-2);border:1px solid var(--brand)}
.btn-primary:hover{background:var(--brand-700);border-color:var(--brand-700);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink-900);border:1px solid var(--ink-900)}
.btn-ghost:hover{background:var(--ink-900);color:var(--paper-2);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-size:14px;font-weight:600}
.link-arrow svg{transition:transform .22s var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}

/* 汉堡与抽屉 */
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--radius-btn);background:var(--paper-2);
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink-900);position:relative;transition:transform .26s var(--ease),background .2s var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ink-900);
  transition:transform .26s var(--ease),top .26s var(--ease);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{top:0;transform:rotate(45deg)}
.nav-toggle.is-open span::after{top:0;transform:rotate(-45deg)}
.drawer{
  position:fixed;inset:0;z-index:80;background:var(--night);
  display:flex;flex-direction:column;justify-content:space-between;
  padding:96px var(--gutter) 32px;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s;
}
.drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer-close{
  position:absolute;top:20px;right:var(--gutter);width:44px;height:44px;
  border:1px solid rgba(241,233,220,.28);border-radius:var(--radius-btn);
  color:var(--on-night);display:flex;align-items:center;justify-content:center;font-size:22px;line-height:1;
}
.drawer nav ul{display:flex;flex-direction:column;gap:8px}
.drawer nav a{
  display:block;font-family:var(--serif);font-size:27px;color:var(--on-night);
  padding:8px 0;border-bottom:1px solid rgba(241,233,220,.12);
  opacity:0;transform:translateY(14px);
}
.drawer.is-open nav a{animation:drawerIn .42s var(--ease) forwards}
.drawer nav li:nth-child(1) a{animation-delay:.04s}
.drawer nav li:nth-child(2) a{animation-delay:.08s}
.drawer nav li:nth-child(3) a{animation-delay:.12s}
.drawer nav li:nth-child(4) a{animation-delay:.16s}
.drawer nav li:nth-child(5) a{animation-delay:.20s}
.drawer nav li:nth-child(6) a{animation-delay:.24s}
@keyframes drawerIn{to{opacity:1;transform:translateY(0)}}
.drawer-foot{display:flex;flex-direction:column;gap:12px;padding-top:24px}
.drawer-foot .btn{width:100%}
.drawer-foot .btn-ghost{color:var(--on-night);border-color:rgba(241,233,220,.4)}
.drawer-foot .btn-ghost:hover{background:var(--on-night);color:var(--night)}
.drawer-foot small{color:var(--on-night-dim);font-size:12px;text-align:center;letter-spacing:.04em}
body.is-locked{overflow:hidden}

/* ---------- 面包屑 ---------- */
.crumbs{background:var(--paper);padding:28px 0 0}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;letter-spacing:.04em;color:var(--ink-500)}
.crumbs li{display:inline-flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:var(--line)}
.crumbs a{color:var(--ink-500)}
.crumbs a:hover{color:var(--brand)}
.crumbs .current{color:var(--ink-700)}

/* ---------- 文章头部 ---------- */
.article-head{padding:24px 0 0;background:var(--paper)}
.head-inner{max-width:880px}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:var(--radius-pill);
  font-size:12px;letter-spacing:.08em;line-height:1.6;
}
.pill-accent{background:var(--accent-soft);color:var(--accent)}
.pill-brand{background:var(--brand-soft);color:var(--brand-700)}
.article-title{
  font-family:var(--serif);font-weight:700;
  font-size:clamp(28px,4.2vw,44px);line-height:1.24;letter-spacing:-.01em;
  color:var(--ink-900);margin:20px 0 0;
  overflow-wrap:break-word;word-break:break-word;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;
  margin-top:22px;font-size:13px;color:var(--ink-500);
}
.article-meta .dot{width:1px;height:12px;background:var(--line)}
.head-rule{height:1px;background:var(--line);margin-top:28px}

/* ---------- 正文阅读区 ---------- */
.reading{padding:56px 0 0}
.reading-grid{
  display:grid;grid-template-columns:minmax(0,760px) 260px;
  gap:56px;justify-content:center;align-items:start;
}
.article-body{font-size:17px;line-height:1.9;color:var(--ink-700);min-width:0}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-family:var(--serif);font-size:clamp(22px,2.5vw,26px);line-height:1.38;
  color:var(--ink-900);margin:44px 0 16px;padding-left:12px;border-left:3px solid var(--brand);
  scroll-margin-top:100px;
}
.article-body h3{
  font-family:var(--serif);font-size:20px;line-height:1.5;color:var(--ink-900);
  margin:30px 0 12px;scroll-margin-top:100px;
}
.article-body h4{font-size:17px;color:var(--ink-900);margin:22px 0 10px}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:0}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:.55em}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.74em;width:8px;height:8px;background:var(--brand)}
.article-body ol{counter-reset:item}
.article-body ol li{position:relative;padding-left:26px;margin-bottom:.55em;counter-increment:item}
.article-body ol li::before{content:counter(item) ".";position:absolute;left:0;top:0;color:var(--brand);font-weight:700}
.article-body blockquote{
  margin:26px 0;padding:20px 22px;border-left:3px solid var(--brand);
  background:rgba(243,225,213,.45);color:var(--ink-700);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{width:100%;height:auto;border-radius:var(--radius-card);margin:26px 0 10px}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:13px;color:var(--ink-500);text-align:center;margin-top:10px}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-700)}
.article-body strong{color:var(--ink-900)}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;line-height:1.7}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px;text-align:left;vertical-align:top}
.article-body th{background:var(--paper-2);color:var(--ink-900);font-weight:600}
.article-body pre{
  margin:24px 0;padding:16px;border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--paper-2);overflow-x:auto;font-size:14px;line-height:1.7;
}
.article-body code{font-size:14px;background:var(--paper-2);padding:2px 6px;border-radius:var(--radius-card)}
.article-body pre code{background:none;padding:0}
.article-body hr{border:0;height:1px;background:var(--line);margin:36px 0}

.article-empty{
  border:1px dashed var(--line);border-radius:var(--radius-card);
  padding:56px 28px;text-align:center;background:var(--paper-2);
}
.article-empty p{font-size:17px;color:var(--ink-900);margin-bottom:14px}
.article-empty a{color:var(--brand);font-weight:600;text-decoration:underline;text-underline-offset:3px}

/* 侧边目录 */
.toc{position:sticky;top:104px;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--paper-2);padding:22px 20px}
.toc h3{font-size:12px;letter-spacing:.14em;color:var(--ink-500);margin-bottom:14px;font-weight:600}
.toc ol{display:flex;flex-direction:column;gap:2px}
.toc a{
  display:block;font-size:14px;line-height:1.6;color:var(--ink-700);
  padding:7px 10px;border-left:2px solid transparent;border-radius:0 var(--radius-card) var(--radius-card) 0;
}
.toc a:hover{color:var(--brand);background:var(--brand-soft)}
.toc a.is-current{color:var(--brand-700);border-left-color:var(--brand);background:var(--brand-soft);font-weight:600}
.toc .toc-cta{margin-top:16px;padding-top:16px;border-top:1px solid var(--line)}
.toc .toc-cta p{font-size:13px;color:var(--ink-500);line-height:1.7;margin-bottom:12px}
.toc .toc-cta .btn{width:100%;height:42px;font-size:14px;padding:0 16px}

/* ---------- 标签 ---------- */
.tag-section{padding:48px 0 0}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.tag-row .tag-label{font-size:12px;letter-spacing:.12em;color:var(--ink-500);margin-right:4px}
.tag{
  display:inline-flex;align-items:center;padding:7px 16px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:var(--paper-2);font-size:13px;color:var(--ink-700);
  transition:border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease);
}
.tag:hover{border-color:var(--brand);color:var(--brand-700);background:var(--brand-soft)}

/* ---------- 相关推荐 ---------- */
.related{padding:56px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:24px}
.section-head h2{font-family:var(--serif);font-size:clamp(22px,2.6vw,28px);color:var(--ink-900);line-height:1.3}
.section-head p{font-size:14px;color:var(--ink-500);margin-top:6px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;border-top:1px solid var(--line);padding-top:24px}
.related-card{display:flex;gap:14px;align-items:flex-start;padding:6px;border-radius:var(--radius-card);transition:background .22s var(--ease)}
.related-card:hover{background:var(--paper-2)}
.related-thumb{width:96px;height:72px;flex-shrink:0;overflow:hidden;border-radius:var(--radius-card);background:var(--paper-2)}
.related-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.related-card:hover .related-thumb img{transform:scale(1.03)}
.related-body{min-width:0}
.related-body h3{font-size:16px;line-height:1.55;color:var(--ink-900);font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-body time{display:block;margin-top:6px;font-size:13px;color:var(--ink-500)}
.related-card:hover .related-body h3{color:var(--brand-700)}

/* ---------- 返回入口 ---------- */
.back-actions{padding:44px 0 0}
.back-row{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- CTA 窄条 ---------- */
.cta-strip{margin-top:80px}
.cta-inner{
  position:relative;overflow:hidden;background:var(--night);
  border-radius:var(--radius-card);
  padding:44px clamp(24px,4vw,48px);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-inner::before{
  content:"";position:absolute;right:-80px;top:-60px;width:320px;height:320px;
  background:radial-gradient(circle,rgba(191,75,34,.42),transparent 68%);
  pointer-events:none;
}
.cta-inner h2{font-family:var(--serif);font-size:clamp(22px,2.6vw,30px);color:var(--on-night);line-height:1.32;position:relative}
.cta-inner p{font-size:14px;color:var(--on-night-dim);margin-top:10px;max-width:520px;position:relative}
.cta-inner .btn{position:relative}
.cta-inner .btn-primary{border-color:var(--brand)}
.cta-inner .btn-ghost{color:var(--on-night);border-color:rgba(241,233,220,.45)}
.cta-inner .btn-ghost:hover{background:var(--on-night);color:var(--night)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--night);color:var(--on-night-dim);margin-top:96px;border-top:1px solid rgba(241,233,220,.12);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px 32px}
.footer-brand .logo-text{font-size:21px;font-weight:700;color:var(--on-night);display:block;margin-bottom:14px}
.footer-brand p{font-size:14px;line-height:1.85;max-width:320px}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-social a{
  width:36px;height:36px;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(241,233,220,.22);border-radius:var(--radius-btn);color:var(--on-night-dim);
  transition:border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease);
}
.footer-social a:hover{border-color:var(--brand);color:var(--on-night);background:rgba(191,75,34,.18)}
.footer-col h4{font-size:13px;letter-spacing:.14em;color:var(--on-night);margin-bottom:16px;font-weight:600}
.footer-col ul{display:flex;flex-direction:column;gap:10px;font-size:14px;line-height:1.7}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  margin-top:48px;padding:22px 0 28px;border-top:1px solid rgba(241,233,220,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--on-night-dim);
}
.footer-bottom nav{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom a:hover{color:var(--brand)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease-out,transform .6s ease-out}
.reveal.is-in{opacity:1;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media(max-width:1199px){
  .reading-grid{grid-template-columns:minmax(0,1fr);gap:0}
  .toc{display:none}
  .site-nav ul{gap:22px}
  .site-nav a{font-size:14px}
}
@media(max-width:991px){
  .site-nav{display:none}
  .nav-actions .btn-sm{display:none}
  .nav-toggle{display:inline-flex}
  .brand-sub{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .related-grid{grid-template-columns:1fr}
  .cta-strip{margin-top:64px}
  .cta-inner{padding:36px 24px}
}
@media(max-width:767px){
  .nav-inner{min-height:64px}
  .brand-name{font-size:19px}
  .article-title{font-size:clamp(24px,6vw,32px)}
  .reading{padding-top:40px}
  .article-body{font-size:15px;line-height:1.8}
  .related{padding-top:44px}
  .back-row .btn{width:100%}
  .cta-inner h2{font-size:22px}
  .site-footer{margin-top:64px;padding-top:48px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .topbar-inner{justify-content:flex-start;gap:12px;padding:8px 0}
}
@media(max-width:520px){
  .drawer nav a{font-size:24px}
  .tag-row .tag{font-size:12px;padding:6px 12px}
  .article-meta{font-size:12px}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --ink-900:#17140F;--ink-700:#3A342C;--ink-500:#6B6355;
  --paper:#F6F1E7;--paper-2:#FBF8F2;--line:#E2D9C9;
  --brand:#BF4B22;--brand-700:#9E3A17;--brand-soft:#F3E1D5;
  --accent:#2E4A3D;--accent-soft:#DDE6DF;
  --night:#14110E;--night-2:#1D1915;--on-night:#F1E9DC;--on-night-dim:#A79C8B;
  --ok:#3F7A55;--warn:#B8862A;--err:#B33A2B;
  --r-card:4px;--r-btn:2px;--r-pill:999px;
  --shadow-1:0 1px 2px rgba(23,20,15,.04),0 8px 24px -12px rgba(23,20,15,.10);
  --shadow-2:0 12px 36px -16px rgba(23,20,15,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --container:1200px;
  --space-sec:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--paper);color:var(--ink-900);
  font-family:var(--sans);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.04;
  background-image:radial-gradient(var(--ink-900) .6px,transparent .6px);
  background-size:4px 4px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color 220ms var(--ease);}
a:hover{color:var(--brand);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-family:var(--serif);font-weight:700;letter-spacing:-.01em;}
h1{font-size:clamp(32px,5.2vw,58px);line-height:1.12;}
h2{font-size:clamp(26px,3.4vw,40px);line-height:1.2;}
h3{font-size:20px;line-height:1.4;}
p{margin:0;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.container{
  width:100%;max-width:var(--container);margin:0 auto;
  padding-left:clamp(20px,4vw,40px);padding-right:clamp(20px,4vw,40px);
  position:relative;z-index:2;
}
.serif{font-family:var(--serif);}
.mono{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ============ 顶部信息条 ============ */
.topbar{
  background:var(--night);color:var(--on-night-dim);
  font-size:13px;letter-spacing:.02em;
}
.topbar .container{
  height:34px;display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.topbar-left{color:var(--on-night-dim);}
.topbar-right a{color:var(--on-night);display:inline-flex;align-items:center;gap:6px;}
.topbar-right a:hover{color:var(--brand);}
.topbar-right a span{transition:transform 220ms var(--ease);display:inline-block;}
.topbar-right a:hover span{transform:translateX(4px);}

/* ============ 主导航 ============ */
.nav-wrap{
  position:sticky;top:0;z-index:80;
  background:rgba(246,241,231,.92);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow 220ms var(--ease),height 220ms var(--ease);
}
.nav-wrap.is-stuck{box-shadow:0 8px 24px -18px rgba(23,20,15,.45);}
.nav-inner{
  height:74px;display:flex;align-items:center;gap:28px;
  transition:height 220ms var(--ease);
}
.nav-wrap.is-stuck .nav-inner{height:64px;}
.brand{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.brand-mark{
  font-family:var(--serif);font-size:20px;font-weight:700;color:var(--ink-900);
  letter-spacing:.02em;white-space:nowrap;
}
.brand-div{width:1px;height:26px;background:var(--line);}
.brand-sub{font-size:12px;line-height:1.35;color:var(--ink-500);letter-spacing:.06em;white-space:nowrap;}
.site-nav{flex:1;display:flex;justify-content:center;}
.site-nav ul{display:flex;align-items:center;gap:6px;}
.site-nav a{
  display:block;padding:8px 14px;font-size:15px;color:var(--ink-700);
  position:relative;white-space:nowrap;
}
.site-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform 220ms var(--ease);
}
.site-nav a:hover{color:var(--ink-900);}
.site-nav a:hover::after,.site-nav a.is-active::after{transform:scaleX(1);}
.site-nav a.is-active{color:var(--ink-900);font-weight:600;}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 24px;background:var(--brand);color:var(--paper);
  border:1px solid var(--brand);border-radius:var(--r-btn);
  font-size:14px;letter-spacing:.04em;flex-shrink:0;
  transition:background 220ms var(--ease),transform 220ms var(--ease);
}
.nav-cta:hover{background:var(--brand-700);border-color:var(--brand-700);color:var(--paper);transform:translateY(-1px);}
.burger{
  display:none;width:44px;height:44px;background:transparent;border:0;
  padding:0;align-items:center;justify-content:center;color:var(--ink-900);
}
.burger span{display:block;width:22px;height:1.6px;background:currentColor;position:relative;transition:transform 220ms var(--ease),background 220ms var(--ease);}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:22px;height:1.6px;background:currentColor;
  transition:transform 220ms var(--ease),top 220ms var(--ease);
}
.burger span::before{top:-7px;}
.burger span::after{top:7px;}
.burger.is-open span{background:transparent;}
.burger.is-open span::before{top:0;transform:rotate(45deg);}
.burger.is-open span::after{top:0;transform:rotate(-45deg);}

/* ============ 移动抽屉 ============ */
.drawer{
  position:fixed;inset:0;z-index:90;background:var(--night);
  display:flex;flex-direction:column;padding:88px 24px 28px;
  opacity:0;visibility:hidden;transition:opacity 260ms var(--ease),visibility 260ms var(--ease);
  overflow-y:auto;
}
.drawer.is-open{opacity:1;visibility:visible;}
.drawer-nav li{opacity:0;transform:translateY(14px);}
.drawer.is-open .drawer-nav li{animation:drawerIn 420ms var(--ease) forwards;}
.drawer.is-open .drawer-nav li:nth-child(1){animation-delay:.04s;}
.drawer.is-open .drawer-nav li:nth-child(2){animation-delay:.08s;}
.drawer.is-open .drawer-nav li:nth-child(3){animation-delay:.12s;}
.drawer.is-open .drawer-nav li:nth-child(4){animation-delay:.16s;}
.drawer.is-open .drawer-nav li:nth-child(5){animation-delay:.2s;}
.drawer.is-open .drawer-nav li:nth-child(6){animation-delay:.24s;}
@keyframes drawerIn{to{opacity:1;transform:translateY(0);}}
.drawer-nav a{
  display:block;padding:14px 0;font-family:var(--serif);font-size:26px;
  color:var(--on-night);border-bottom:1px solid rgba(241,233,220,.12);
}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--brand);}
.drawer-foot{margin-top:auto;padding-top:32px;display:grid;gap:12px;}
.drawer-foot .btn{width:100%;}
.drawer-note{font-size:12px;color:var(--on-night-dim);letter-spacing:.06em;text-align:center;margin-top:8px;}
.close-drawer{
  position:absolute;top:22px;right:20px;width:44px;height:44px;background:transparent;
  border:1px solid rgba(241,233,220,.3);color:var(--on-night);border-radius:var(--r-btn);
  font-size:18px;line-height:1;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;letter-spacing:.04em;border:1px solid transparent;
  transition:background 220ms var(--ease),color 220ms var(--ease),border-color 220ms var(--ease),transform 220ms var(--ease);
}
.btn-primary{background:var(--brand);color:var(--paper);border-color:var(--brand);}
.btn-primary:hover{background:var(--brand-700);border-color:var(--brand-700);color:var(--paper);transform:translateY(-1px);}
.btn-ghost{background:transparent;color:var(--ink-900);border-color:var(--ink-900);}
.btn-ghost:hover{background:var(--ink-900);color:var(--paper);transform:translateY(-1px);}
.btn-onnight{background:transparent;color:var(--on-night);border-color:rgba(241,233,220,.4);}
.btn-onnight:hover{background:var(--on-night);color:var(--night);border-color:var(--on-night);}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;color:var(--brand);
  font-size:14px;letter-spacing:.04em;font-weight:600;
}
.link-arrow svg{transition:transform 220ms var(--ease);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ============ 面包屑 ============ */
.crumb{padding:22px 0 0;font-size:12px;letter-spacing:.04em;color:var(--ink-500);}
.crumb ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.crumb li::after{content:"/";margin-left:8px;color:var(--line);}
.crumb li:last-child::after{content:"";margin:0;}
.crumb a{color:var(--ink-500);}
.crumb a:hover{color:var(--brand);}
.crumb li[aria-current]{color:var(--ink-700);}

/* ============ 分类头部 ============ */
.cat-head{
  padding:36px 0 56px;border-bottom:1px solid var(--line);
  background:
    radial-gradient(320px 320px at 88% 6%,rgba(191,75,34,.12),transparent 70%);
}
.cat-head-grid{
  display:grid;grid-template-columns:1.6fr .8fr;gap:48px;align-items:end;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.08em;
  color:var(--accent);background:var(--accent-soft);
  padding:6px 14px;border-radius:var(--r-pill);margin-bottom:20px;
}
.cat-head h1{margin-bottom:18px;overflow-wrap:break-word;}
.cat-head h1 em{
  font-style:normal;color:var(--brand);display:block;
  font-size:clamp(18px,2.2vw,24px);letter-spacing:.02em;margin-top:12px;font-weight:600;
}
.cat-lead{font-size:16px;line-height:1.85;color:var(--ink-700);max-width:56ch;}
.head-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-1);
}
.head-card dl{display:grid;gap:14px;margin:0;}
.head-card .row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding-bottom:12px;border-bottom:1px solid var(--line);}
.head-card .row:last-child{border-bottom:0;padding-bottom:0;}
.head-card dt{font-size:13px;color:var(--ink-500);letter-spacing:.04em;}
.head-card dd{
  margin:0;font-family:var(--serif);font-size:22px;font-weight:700;color:var(--ink-900);
  font-variant-numeric:tabular-nums;
}
.head-card dd small{font-size:12px;color:var(--ink-500);font-family:var(--sans);font-weight:400;margin-left:4px;}

/* ============ 通用板块 ============ */
.section{padding:var(--space-sec) 0;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:32px;
  margin-bottom:40px;flex-wrap:wrap;
}
.section-head p{font-size:14px;color:var(--ink-500);max-width:46ch;line-height:1.8;}

/* 筛选胶囊 */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:36px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 18px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:var(--paper-2);color:var(--ink-700);font-size:13px;letter-spacing:.04em;
  transition:background 220ms var(--ease),color 220ms var(--ease),border-color 220ms var(--ease);
}
.chip:hover{border-color:var(--brand);color:var(--brand);}
.chip.is-on{background:var(--ink-900);border-color:var(--ink-900);color:var(--paper);}
.chip.is-on:hover{background:var(--ink-900);color:var(--paper);}

/* ============ 卡片墙 ============ */
.wall{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.card{
  position:relative;display:flex;flex-direction:column;
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.card:hover{border-color:var(--brand);box-shadow:var(--shadow-2);}
.card-media{position:relative;overflow:hidden;aspect-ratio:16/10;background:var(--line);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease);}
.card:hover .card-media img{transform:scale(1.03);}
.card-tag{
  position:absolute;top:14px;left:14px;z-index:2;
  padding:5px 12px;border-radius:var(--r-pill);
  background:rgba(20,17,14,.78);color:var(--on-night);
  font-size:12px;letter-spacing:.08em;backdrop-filter:blur(4px);
}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:19px;line-height:1.45;}
.card-body p{font-size:14px;line-height:1.8;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:12px;letter-spacing:.06em;color:var(--ink-500);
}
.card-meta .arrow{color:var(--brand);display:inline-flex;transition:transform 220ms var(--ease);}
.card:hover .card-meta .arrow{transform:translateX(4px);}
.card-link{position:absolute;inset:0;z-index:3;border-radius:var(--r-card);}

/* 首格大卡 */
.card.wide{grid-column:span 2;flex-direction:row;}
.card.wide .card-media{aspect-ratio:auto;flex:0 0 56%;min-height:100%;}
.card.wide .card-body{padding:32px;justify-content:center;gap:14px;}
.card.wide .card-body h3{font-size:clamp(22px,2.4vw,28px);}
.card.wide .card-body p{font-size:15px;-webkit-line-clamp:3;}

/* ============ 制作流程条 ============ */
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border-top:1px solid var(--ink-900);
}
.step{padding:28px 24px 0 0;border-right:1px solid var(--line);}
.step:last-child{border-right:0;padding-right:0;}
.step .num{
  font-family:var(--serif);font-style:italic;font-size:22px;color:var(--brand);
  display:block;margin-bottom:14px;font-variant-numeric:tabular-nums;
}
.step h3{font-size:17px;margin-bottom:10px;}
.step p{font-size:13.5px;line-height:1.8;color:var(--ink-500);}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:.8fr 1.6fr;gap:56px;align-items:start;}
.faq-aside{position:sticky;top:104px;}
.faq-aside p{font-size:14px;color:var(--ink-500);line-height:1.8;margin-top:16px;}
.faq-aside .mini-card{
  margin-top:28px;padding:20px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--paper-2);
}
.faq-aside .mini-card strong{display:block;font-size:14px;margin-bottom:6px;}
.faq-aside .mini-card span{font-size:13px;color:var(--ink-500);line-height:1.7;display:block;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:transparent;border:0;padding:22px 0;text-align:left;
  font-size:17px;font-family:var(--sans);color:var(--ink-900);line-height:1.6;
  transition:color 220ms var(--ease);
}
.faq-q:hover{color:var(--brand);}
.faq-icon{
  flex:0 0 20px;width:20px;height:20px;position:relative;
  transition:transform 260ms var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:1px;
}
.faq-icon::before{left:0;top:9px;width:20px;height:1.6px;}
.faq-icon::after{left:9px;top:0;width:1.6px;height:20px;}
.faq-q[aria-expanded="true"] .faq-icon{transform:rotate(45deg);}
.faq-a{overflow:hidden;max-height:0;transition:max-height 260ms var(--ease);}
.faq-a-inner{padding:0 40px 24px 0;font-size:15px;line-height:1.9;color:var(--ink-700);}

/* ============ CTA 窄条 ============ */
.cta-band{background:var(--night);color:var(--on-night);position:relative;overflow:hidden;}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;
  background:radial-gradient(circle,rgba(191,75,34,.28),transparent 68%);
  pointer-events:none;
}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:48px 0;flex-wrap:wrap;
}
.cta-inner h2{color:var(--on-night);font-size:clamp(22px,2.6vw,30px);}
.cta-inner p{color:var(--on-night-dim);font-size:14px;margin-top:10px;max-width:52ch;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 相关分类 ============ */
.related{padding:0 0 var(--space-sec);}
.related .rel-head{font-size:13px;letter-spacing:.08em;color:var(--ink-500);margin-bottom:20px;}
.rel-links{display:flex;flex-wrap:wrap;gap:12px 28px;}
.rel-links a{
  font-family:var(--serif);font-size:17px;color:var(--ink-900);
  border-bottom:1px solid var(--line);padding-bottom:4px;
  transition:border-color 220ms var(--ease),color 220ms var(--ease);
}
.rel-links a:hover{color:var(--brand);border-color:var(--brand);}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--night);color:var(--on-night-dim);
  border-top:1px solid rgba(241,233,220,.12);
  padding:72px 0 0;font-size:14px;position:relative;
}
.footer-grid{
  display:grid;grid-template-columns:1.8fr 1fr 1fr 1.3fr;gap:48px;
  padding-bottom:56px;
}
.footer-brand .logo-text{
  display:block;font-size:22px;color:var(--on-night);margin-bottom:16px;letter-spacing:.04em;
}
.footer-brand p{font-size:13.5px;line-height:1.85;color:var(--on-night-dim);max-width:34ch;}
.footer-social{display:flex;gap:12px;margin-top:22px;}
.footer-social a{
  width:36px;height:36px;border:1px solid rgba(241,233,220,.22);border-radius:var(--r-btn);
  display:inline-flex;align-items:center;justify-content:center;color:var(--on-night);
  transition:border-color 220ms var(--ease),color 220ms var(--ease),background 220ms var(--ease);
}
.footer-social a:hover{border-color:var(--brand);color:var(--brand);background:rgba(191,75,34,.08);}
.footer-col h4{
  font-family:var(--sans);font-size:13px;letter-spacing:.1em;color:var(--on-night);
  margin-bottom:18px;font-weight:600;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col li,.footer-col a{font-size:13.5px;line-height:1.75;color:var(--on-night-dim);}
.footer-col a:hover{color:var(--on-night);}
.footer-bottom{
  border-top:1px solid rgba(241,233,220,.12);
  padding:22px 0 28px;display:flex;align-items:center;justify-content:space-between;
  gap:20px;flex-wrap:wrap;font-size:13px;color:var(--on-night-dim);
}
.footer-bottom nav{display:flex;gap:20px;flex-wrap:wrap;}
.footer-bottom a{color:var(--on-night-dim);}
.footer-bottom a:hover{color:var(--on-night);}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(14px);transition:opacity 600ms ease-out,transform 600ms ease-out;}
.reveal.is-in{opacity:1;transform:translateY(0);}

/* ============ 响应式 ============ */
@media (min-width:1440px){:root{--container:1280px;}}
@media (max-width:1199px){
  .wall{grid-template-columns:repeat(2,1fr);}
  .card.wide{grid-column:span 2;flex-direction:column;}
  .card.wide .card-media{flex:none;aspect-ratio:16/9;width:100%;}
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr;gap:40px;}
  .footer-grid .footer-col:last-child{grid-column:span 3;}
}
@media (max-width:991px){
  :root{--space-sec:64px;}
  .site-nav,.nav-cta,.brand-div,.brand-sub{display:none;}
  .burger{display:inline-flex;}
  .nav-inner{height:64px;justify-content:space-between;}
  .cat-head-grid{grid-template-columns:1fr;gap:32px;align-items:start;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .step{padding:24px 20px 12px 0;}
  .step:nth-child(2n){border-right:0;}
  .faq-wrap{grid-template-columns:1fr;gap:32px;}
  .faq-aside{position:static;}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:24px;}
}
@media (max-width:767px){
  :root{--space-sec:56px;}
  body{font-size:15px;}
  .wall{grid-template-columns:1fr;}
  .card.wide{grid-column:span 1;}
  .card.wide .card-body{padding:22px;}
  .section-head{margin-bottom:28px;}
  .footer-grid{grid-template-columns:1fr;gap:36px;}
  .footer-grid .footer-col:last-child{grid-column:span 1;}
  .btn{width:100%;}
  .cta-actions{width:100%;flex-direction:column;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:519px){
  .topbar .container{height:auto;padding-top:8px;padding-bottom:8px;flex-wrap:wrap;}
  .head-card dd{font-size:19px;}
  .steps{grid-template-columns:1fr;}
  .step{border-right:0;border-bottom:1px solid var(--line);padding:20px 0;}
  .step:last-child{border-bottom:0;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --ink-900:#17140F;--ink-700:#3A342C;--ink-500:#6B6355;
  --paper:#F6F1E7;--paper-2:#FBF8F2;--line:#E2D9C9;
  --brand:#BF4B22;--brand-700:#9E3A17;--brand-soft:#F3E1D5;
  --accent:#2E4A3D;--accent-soft:#DDE6DF;
  --night:#14110E;--night-2:#1D1915;--on-night:#F1E9DC;--on-night-dim:#A79C8B;
  --success:#3F7A55;--warning:#B8862A;--error:#B33A2B;
  --radius-card:4px;--radius-btn:2px;--radius-pill:999px;
  --shadow-1:0 1px 2px rgba(23,20,15,.04),0 8px 24px -12px rgba(23,20,15,.10);
  --shadow-2:0 12px 36px -16px rgba(23,20,15,.18);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:Inter,"Helvetica Neue",Arial,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;padding:0;
  font-family:var(--font-sans);font-size:16px;line-height:1.85;
  color:var(--ink-700);background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color 220ms var(--ease)}
button{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-family:var(--font-serif);font-weight:700;letter-spacing:-.01em}
p{margin:0}
.serif{font-family:var(--font-serif)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 clamp(20px,4vw,40px)}
@media (min-width:1440px){.container{max-width:1280px}}

/* ============ 顶部信息条 ============ */
.topbar{background:var(--night);color:var(--on-night-dim);font-size:13px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:34px}
.topbar-note{letter-spacing:.02em}
.topbar-link{color:var(--on-night);display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.topbar-link:hover{color:var(--brand-soft)}
.topbar-link span{transition:transform 220ms var(--ease)}
.topbar-link:hover span{transform:translateX(4px)}

/* ============ 主导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,248,242,.92);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow 220ms var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1)}
.header-inner{display:flex;align-items:center;gap:clamp(16px,3vw,40px);height:76px;transition:height 220ms var(--ease)}
.site-header.is-scrolled .header-inner{height:64px}
.logo{display:flex;align-items:center;gap:14px;flex:none}
.logo-text{font-size:22px;font-weight:700;color:var(--ink-900);letter-spacing:.02em;line-height:1.1;white-space:nowrap}
.logo-sub{font-size:12px;line-height:1.35;color:var(--ink-500);padding-left:14px;border-left:1px solid var(--line);white-space:nowrap}
.site-nav{flex:1;display:flex;justify-content:center}
.site-nav ul{display:flex;align-items:center;gap:clamp(14px,2.2vw,30px)}
.site-nav a{position:relative;display:inline-block;padding:10px 2px;font-size:15px;color:var(--ink-700);white-space:nowrap}
.site-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left center;transition:transform 220ms var(--ease);
}
.site-nav a:hover{color:var(--ink-900)}
.site-nav a:hover::after{transform:scaleX(1)}
.site-nav a.is-active{color:var(--ink-900);font-weight:600}
.site-nav a.is-active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;flex:none}
.nav-drawer-foot{display:none}

.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  background:transparent;border:1px solid transparent;border-radius:var(--radius-btn);
  cursor:pointer;padding:0;
}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink-900);transition:transform 220ms var(--ease),background 220ms var(--ease)}
.nav-toggle span+span{margin-top:6px}
.nav-toggle.is-open span:first-child{transform:translateY(4px) rotate(45deg);background:var(--on-night)}
.nav-toggle.is-open span:last-child{transform:translateY(-4px) rotate(-45deg);background:var(--on-night)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.02em;cursor:pointer;border:1px solid transparent;
  transition:background 220ms var(--ease),color 220ms var(--ease),border-color 220ms var(--ease),transform 220ms var(--ease),box-shadow 220ms var(--ease);
}
.btn-primary{background:var(--brand);color:var(--paper-2)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink-900);border-color:var(--ink-900)}
.btn-ghost:hover{background:var(--ink-900);color:var(--paper-2)}
.btn-sm{min-height:40px;padding:0 20px;font-size:14px}
.btn-light{background:var(--brand);color:var(--paper-2)}
.btn-light:hover{background:var(--brand-700);transform:translateY(-1px)}
.btn-outline-light{background:transparent;color:var(--on-night);border-color:rgba(241,233,220,.45)}
.btn-outline-light:hover{background:var(--on-night);color:var(--night);border-color:var(--on-night)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;font-weight:600}
.link-arrow i{font-style:normal;transition:transform 220ms var(--ease)}
.link-arrow:hover{color:var(--brand-700)}
.link-arrow:hover i{transform:translateX(4px)}

/* ============ 面包屑 ============ */
.breadcrumb-wrap{padding-top:clamp(20px,3vw,32px)}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;letter-spacing:.04em;color:var(--ink-500)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--line)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb [aria-current="page"]{color:var(--ink-500)}

/* ============ 页头 ============ */
.page-head{padding:clamp(28px,4vw,48px) 0 clamp(48px,6vw,80px);position:relative;overflow:hidden}
.page-head::before{
  content:"";position:absolute;top:-120px;right:-60px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,var(--brand) 0%,transparent 70%);opacity:.12;pointer-events:none;
}
.page-head-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:clamp(24px,4vw,56px);align-items:start}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--radius-pill);
  background:var(--accent-soft);color:var(--accent);
  font-size:12px;letter-spacing:.08em;font-weight:600;margin-bottom:20px;
}
.page-head h1{font-size:clamp(30px,4.4vw,54px);line-height:1.14;letter-spacing:-.01em;overflow-wrap:break-word}
.page-head .lead{margin-top:20px;font-size:16px;line-height:1.85;color:var(--ink-700);max-width:34em}
.head-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.head-meta{display:flex;flex-wrap:wrap;align-items:center;gap:0;margin-top:32px;font-size:13px;color:var(--ink-500);font-variant-numeric:tabular-nums}
.head-meta span{padding:0 16px;border-left:1px solid var(--line)}
.head-meta span:first-child{padding-left:0;border-left:0}
.head-meta strong{color:var(--ink-900);font-family:var(--font-num);font-weight:600}

.page-head-card{position:relative}
.frame{position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);background:var(--night)}
.frame::after{content:"";position:absolute;inset:12px -12px -12px 12px;border:1px solid var(--brand);border-radius:var(--radius-card);pointer-events:none;z-index:-1}
.frame img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
.head-stat{
  margin-top:20px;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:20px 22px;box-shadow:var(--shadow-1);
}
.head-stat-label{display:block;font-size:12px;letter-spacing:.08em;color:var(--ink-500)}
.head-stat-value{display:flex;align-items:baseline;gap:6px;margin-top:6px;font-family:var(--font-num);font-size:32px;line-height:1.1;color:var(--ink-900);font-weight:600;font-variant-numeric:tabular-nums}
.head-stat-value span{font-family:var(--font-sans);font-size:13px;font-weight:500;color:var(--ink-500)}
.head-stat-note{display:block;margin-top:8px;font-size:13px;color:var(--ink-500)}

/* ============ 通用板块 ============ */
.section{padding:clamp(56px,7vw,96px) 0}
.section-alt{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:clamp(28px,4vw,48px)}
.section-head h2{font-size:clamp(24px,3.2vw,38px);line-height:1.2}
.section-head p{max-width:46em;font-size:15px;color:var(--ink-500);margin-top:12px}
.section-head .section-side{font-size:14px;color:var(--ink-500);max-width:24em}

/* ============ 流程四格 ============ */
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--ink-900)}
.flow-item{padding:28px 24px 8px 0;border-right:1px solid var(--line);min-width:0}
.flow-item:last-child{border-right:0;padding-right:0}
.flow-num{
  display:block;font-family:var(--font-serif);font-style:italic;font-size:22px;
  color:var(--brand);margin-bottom:14px;line-height:1;
}
.flow-item h3{font-size:20px;line-height:1.4;margin-bottom:10px}
.flow-item p{font-size:14px;line-height:1.8;color:var(--ink-500)}
.flow-list{margin-top:18px;display:flex;flex-wrap:wrap;gap:8px}
.flow-list li{
  font-size:12px;letter-spacing:.04em;color:var(--accent);
  background:var(--accent-soft);border-radius:var(--radius-pill);padding:4px 12px;
}

/* ============ 参数表 ============ */
.spec-wrap{overflow-x:auto;border-radius:var(--radius-card);border:1px solid var(--line);background:var(--paper-2)}
.spec-table{width:100%;min-width:560px;border-collapse:collapse;font-size:15px}
.spec-table thead th{
  background:rgba(226,217,201,.35);color:var(--ink-500);
  font-size:12px;letter-spacing:.08em;font-weight:600;text-align:left;
  padding:14px 20px;border-bottom:1px solid var(--line);
}
.spec-table tbody th,.spec-table tbody td{
  padding:14px 20px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;line-height:1.7;
}
.spec-table tbody th{width:32%;font-weight:600;color:var(--ink-900);background:rgba(246,241,231,.6)}
.spec-table tbody td{color:var(--ink-700);font-variant-numeric:tabular-nums}
.spec-table tbody tr:last-child th,.spec-table tbody tr:last-child td{border-bottom:0}
.spec-table tbody tr:hover td{background:var(--brand-soft)}

/* ============ 能力卡 ============ */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cap-card{
  display:block;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;transition:border-color 220ms var(--ease),box-shadow 220ms var(--ease),transform 220ms var(--ease);
}
.cap-card:hover{border-color:var(--brand);box-shadow:var(--shadow-2);transform:translateY(-2px)}
.cap-media{overflow:hidden}
.cap-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform 400ms var(--ease)}
.cap-card:hover .cap-media img{transform:scale(1.03)}
.cap-body{padding:22px 22px 26px}
.cap-body h3{font-size:20px;line-height:1.4;margin-bottom:10px}
.cap-body p{font-size:14px;line-height:1.8;color:var(--ink-500)}
.cap-foot{display:flex;align-items:center;justify-content:space-between;margin-top:20px;padding-top:16px;border-top:1px solid var(--line)}
.cap-tag{font-size:12px;letter-spacing:.06em;color:var(--accent)}
.cap-foot i{font-style:normal;color:var(--brand);transition:transform 220ms var(--ease)}
.cap-card:hover .cap-foot i{transform:translateX(4px)}

/* ============ 暗场数据 ============ */
.night-band{background:var(--night);color:var(--on-night)}
.night-band .section-head h2{color:var(--on-night)}
.night-band .section-head p{color:var(--on-night-dim)}
.band-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid rgba(241,233,220,.14)}
.band-item{padding:32px 28px 8px 0;border-right:1px solid rgba(241,233,220,.14)}
.band-item:last-child{border-right:0;padding-right:0}
.band-value{
  display:flex;align-items:baseline;gap:6px;
  font-family:var(--font-num);font-size:clamp(40px,4.4vw,56px);font-weight:600;line-height:1;
  color:var(--on-night);font-variant-numeric:tabular-nums;
}
.band-value em{font-family:var(--font-sans);font-style:normal;font-size:14px;font-weight:500;color:var(--on-night-dim)}
.band-item p{margin-top:12px;font-size:13px;color:var(--on-night-dim);line-height:1.8}
.band-foot{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(241,233,220,.14);
  font-size:12px;letter-spacing:.12em;color:var(--on-night-dim);
}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:clamp(24px,4vw,56px);align-items:start}
.faq-aside h2{font-size:clamp(24px,3.2vw,38px);line-height:1.2}
.faq-aside p{margin-top:14px;font-size:15px;color:var(--ink-500)}
.faq-contact{
  margin-top:24px;padding:20px 22px;background:var(--paper-2);
  border:1px solid var(--line);border-radius:var(--radius-card);
}
.faq-contact span{display:block;font-size:12px;letter-spacing:.08em;color:var(--ink-500)}
.faq-contact strong{display:block;margin-top:6px;font-family:var(--font-num);font-size:20px;color:var(--ink-900);font-weight:600}
.faq-contact a{display:inline-flex;margin-top:12px;font-size:14px;color:var(--brand);font-weight:600}
.faq-contact a:hover{color:var(--brand-700)}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:64px;padding:20px 0;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:17px;font-weight:600;color:var(--ink-900);line-height:1.6;
}
.faq-q:hover{color:var(--brand)}
.faq-icon{position:relative;flex:none;width:16px;height:16px;transition:transform 260ms var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand)}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
.faq-q[aria-expanded="true"] .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease)}
.faq-a p{padding:0 40px 24px 0;font-size:15px;line-height:1.9;color:var(--ink-500)}

/* ============ CTA 窄条 ============ */
.cta-section{padding-bottom:clamp(56px,7vw,96px)}
.cta-bar{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  background:var(--night);border-radius:var(--radius-card);padding:clamp(24px,3.4vw,36px) clamp(24px,4vw,44px);
  position:relative;overflow:hidden;
}
.cta-bar::before{
  content:"";position:absolute;top:-80px;left:8%;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,var(--brand) 0%,transparent 70%);opacity:.22;pointer-events:none;
}
.cta-copy{position:relative}
.cta-copy h2{color:var(--on-night);font-size:clamp(20px,2.6vw,28px);line-height:1.3}
.cta-copy p{margin-top:8px;font-size:14px;color:var(--on-night-dim)}
.cta-actions{position:relative;display:flex;flex-wrap:wrap;gap:12px;flex:none}

/* ============ 相关分类 ============ */
.related-wrap{padding:0 0 clamp(56px,7vw,96px)}
.related-head{display:flex;align-items:center;gap:16px;margin-bottom:20px}
.related-head h2{font-size:16px;font-family:var(--font-sans);font-weight:600;letter-spacing:.08em;color:var(--ink-500)}
.related-head::after{content:"";flex:1;height:1px;background:var(--line)}
.related{display:flex;flex-wrap:wrap;gap:12px}
.related a{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 20px;border:1px solid var(--line);border-radius:var(--radius-pill);
  font-size:14px;color:var(--ink-700);background:var(--paper-2);
  transition:border-color 220ms var(--ease),color 220ms var(--ease),background 220ms var(--ease);
}
.related a:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.related a i{font-style:normal;color:var(--brand);transition:transform 220ms var(--ease)}
.related a:hover i{transform:translateX(3px)}

/* ============ 页脚 ============ */
.site-footer{background:var(--night);color:var(--on-night-dim);border-top:1px solid rgba(241,233,220,.12);padding:clamp(48px,6vw,80px) 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:clamp(24px,3.4vw,48px)}
.footer-brand .logo-text{display:block;color:var(--on-night);font-size:22px;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.9;color:var(--on-night-dim);max-width:24em}
.footer-social{display:flex;gap:10px;margin-top:22px}
.footer-social a{
  width:36px;height:36px;border:1px solid rgba(241,233,220,.2);border-radius:var(--radius-pill);
  display:inline-flex;align-items:center;justify-content:center;color:var(--on-night-dim);
  transition:border-color 220ms var(--ease),color 220ms var(--ease),background 220ms var(--ease);
}
.footer-social a:hover{border-color:var(--brand);color:var(--on-night);background:rgba(191,75,34,.18)}
.footer-col h4{font-family:var(--font-sans);font-size:13px;letter-spacing:.1em;color:var(--on-night);font-weight:600;margin-bottom:18px}
.footer-col li{font-size:14px;line-height:2;color:var(--on-night-dim)}
.footer-col a:hover{color:var(--on-night)}
.footer-bottom{
  margin-top:clamp(36px,5vw,56px);border-top:1px solid rgba(241,233,220,.12);
  padding:20px 0 28px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--on-night-dim);
}
.footer-bottom nav{display:flex;flex-wrap:wrap;gap:20px}
.footer-bottom a:hover{color:var(--on-night)}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(14px);transition:opacity 600ms ease-out,transform 600ms ease-out}
.reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  .page-head-grid{grid-template-columns:7fr 5fr}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr}
}
@media (max-width:992px){
  .nav-toggle{display:inline-flex}
  .header-actions .btn-sm{display:none}
  .site-nav{
    position:fixed;inset:0;z-index:50;
    display:flex;flex-direction:column;justify-content:flex-start;
    background:var(--night);padding:118px 24px 32px;
    transform:translateY(-100%);opacity:0;pointer-events:none;overflow-y:auto;
    transition:transform 320ms var(--ease),opacity 240ms var(--ease);
  }
  .site-nav.is-open{transform:translateY(0);opacity:1;pointer-events:auto}
  .site-nav ul{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .site-nav li{opacity:0;transform:translateY(14px);transition:opacity 300ms var(--ease),transform 300ms var(--ease)}
  .site-nav.is-open li{opacity:1;transform:none}
  .site-nav.is-open li:nth-child(1){transition-delay:60ms}
  .site-nav.is-open li:nth-child(2){transition-delay:100ms}
  .site-nav.is-open li:nth-child(3){transition-delay:140ms}
  .site-nav.is-open li:nth-child(4){transition-delay:180ms}
  .site-nav.is-open li:nth-child(5){transition-delay:220ms}
  .site-nav.is-open li:nth-child(6){transition-delay:260ms}
  .site-nav a{
    display:block;font-family:var(--font-serif);font-size:26px;font-weight:600;
    color:var(--on-night);padding:18px 0;border-bottom:1px solid rgba(241,233,220,.12);
  }
  .site-nav a::after{display:none}
  .site-nav a.is-active{color:var(--brand-soft)}
  .nav-drawer-foot{
    display:flex;flex-wrap:wrap;gap:12px;margin-top:auto;padding-top:32px;
  }
  .nav-drawer-foot .btn{flex:1;min-width:140px}
  .nav-drawer-foot small{width:100%;font-size:12px;color:var(--on-night-dim);line-height:1.8;padding-top:8px}

  .page-head-grid{grid-template-columns:1fr;gap:32px}
  .page-head-card{max-width:520px}
  .frame img{aspect-ratio:16/10}
  .flow-grid{grid-template-columns:repeat(2,1fr)}
  .flow-item{padding:24px 20px 8px 0;border-bottom:1px solid var(--line)}
  .flow-item:nth-child(2n){border-right:0;padding-right:0}
  .flow-item:nth-last-child(-n+2){border-bottom:0}
  .cap-grid{grid-template-columns:repeat(2,1fr)}
  .band-grid{grid-template-columns:repeat(2,1fr);gap:0}
  .band-item:nth-child(2n){border-right:0;padding-right:0}
  .band-item{border-bottom:1px solid rgba(241,233,220,.14);padding-bottom:24px}
  .band-item:last-child{border-bottom:0}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .faq-aside{position:static}
  .cta-bar{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:768px){
  .cap-grid{grid-template-columns:1fr}
  .logo-sub{display:none}
  .topbar-note{display:none}
  .topbar-inner{justify-content:flex-end}
}
@media (max-width:560px){
  .flow-grid{grid-template-columns:1fr}
  .flow-item{border-right:0;padding-right:0;border-bottom:1px solid var(--line)}
  .flow-item:last-child{border-bottom:0}
  .band-grid{grid-template-columns:1fr}
  .band-item{border-right:0;padding-right:0}
  .head-actions .btn{flex:1;min-width:0}
  .head-meta span{padding:0 10px}
  .cta-actions .btn{min-height:48px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --ink-900:#17140F;
  --ink-700:#3A342C;
  --ink-500:#6B6355;
  --paper:#F6F1E7;
  --paper-2:#FBF8F2;
  --line:#E2D9C9;
  --brand:#BF4B22;
  --brand-700:#9E3A17;
  --brand-soft:#F3E1D5;
  --accent:#2E4A3D;
  --accent-soft:#DDE6DF;
  --night:#14110E;
  --night-2:#1D1915;
  --on-night:#F1E9DC;
  --on-night-dim:#A79C8B;
  --success:#3F7A55;
  --warning:#B8862A;
  --error:#B33A2B;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --num:"Inter","SFMono-Regular",ui-monospace,Menlo,monospace;
  --r-card:4px;
  --r-btn:2px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(23,20,15,.04),0 8px 24px -12px rgba(23,20,15,.10);
  --shadow-2:0 12px 36px -16px rgba(23,20,15,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sec:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-700);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
body.is-locked{overflow:hidden;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0;}
h1,h2,h3,h4{margin:0;font-family:var(--serif);color:var(--ink-900);font-weight:700;line-height:1.22;}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.serif{font-family:var(--serif);}
.num{font-family:var(--num);font-variant-numeric:tabular-nums;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 clamp(20px,4vw,40px);
}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--night);
  color:var(--on-night-dim);
  font-size:13px;
  line-height:1;
}
.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:34px;
  padding-top:9px;
  padding-bottom:9px;
}
.topbar-inner span{letter-spacing:.02em;}
.topbar-link{
  color:var(--on-night);
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:color .22s var(--ease);
}
.topbar-link:hover{color:var(--brand-soft);}
.topbar-link i{font-style:normal;transition:transform .22s var(--ease);}
.topbar-link:hover i{transform:translateX(4px);}

/* ---------- 主导航 ---------- */
.site-header{position:relative;z-index:60;}
.nav-bar{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,241,231,.92);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease),padding .22s var(--ease);
}
.nav-bar.is-stuck{box-shadow:var(--shadow-1);}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding-top:16px;
  padding-bottom:16px;
  transition:padding .22s var(--ease);
}
.nav-bar.is-stuck .nav-inner{padding-top:10px;padding-bottom:10px;}
.brand{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.brand .logo-text{
  font-family:var(--serif);
  font-size:22px;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:.02em;
  line-height:1.2;
  white-space:nowrap;
}
.brand-sub{
  font-size:12px;
  color:var(--ink-500);
  border-left:1px solid var(--line);
  padding-left:14px;
  line-height:1.5;
  white-space:nowrap;
}
.site-nav ul{display:flex;align-items:center;gap:26px;}
.site-nav a{
  position:relative;
  display:block;
  padding:6px 0;
  font-size:14.5px;
  color:var(--ink-700);
  transition:color .22s var(--ease);
}
.site-nav a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.site-nav a:hover{color:var(--ink-900);}
.site-nav a:hover::after,.site-nav a.is-active::after{transform:scaleX(1);}
.site-nav a.is-active{color:var(--ink-900);font-weight:600;}
.nav-cta{flex-shrink:0;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  background:var(--paper-2);
}
.nav-toggle span{
  position:relative;
  display:block;
  width:20px;height:2px;
  background:var(--ink-900);
  transition:background .22s var(--ease);
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;left:0;
  width:20px;height:2px;
  background:var(--ink-900);
  transition:transform .22s var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg);}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;
  inset:0;
  z-index:120;
  display:flex;
  flex-direction:column;
  background:var(--night);
  color:var(--on-night);
  padding:22px clamp(20px,5vw,32px) 28px;
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease);
}
.drawer.is-open{opacity:1;visibility:visible;transform:none;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid rgba(241,233,220,.14);}
.drawer-head .logo-text{font-family:var(--serif);font-size:20px;font-weight:700;color:var(--on-night);}
.drawer-close{
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  font-size:26px;line-height:1;
  color:var(--on-night);
  border:1px solid rgba(241,233,220,.2);
  border-radius:var(--r-btn);
}
.drawer-nav{
  flex:1;
  display:flex;
  flex-direction:column;
  gap:2px;
  padding-top:24px;
  overflow-y:auto;
}
.drawer-nav li{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .36s var(--ease),transform .36s var(--ease);
}
.drawer.is-open .drawer-nav li{opacity:1;transform:none;}
.drawer.is-open .drawer-nav li:nth-child(1){transition-delay:.04s;}
.drawer.is-open .drawer-nav li:nth-child(2){transition-delay:.08s;}
.drawer.is-open .drawer-nav li:nth-child(3){transition-delay:.12s;}
.drawer.is-open .drawer-nav li:nth-child(4){transition-delay:.16s;}
.drawer.is-open .drawer-nav li:nth-child(5){transition-delay:.20s;}
.drawer.is-open .drawer-nav li:nth-child(6){transition-delay:.24s;}
.drawer-nav a{
  display:block;
  font-family:var(--serif);
  font-size:26px;
  line-height:1.6;
  color:var(--on-night);
  padding:8px 0;
}
.drawer-nav a.is-active{color:var(--brand-soft);}
.drawer-foot{
  padding-top:20px;
  border-top:1px solid rgba(241,233,220,.14);
  display:grid;
  gap:12px;
}
.drawer-foot .btn{width:100%;}
.drawer-foot p{margin:6px 0 0;font-size:12px;color:var(--on-night-dim);line-height:1.7;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  height:48px;
  padding:0 28px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-primary{background:var(--brand);color:var(--paper-2);}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-ghost{background:transparent;color:var(--ink-900);border-color:var(--ink-900);}
.btn-ghost:hover{background:var(--ink-900);color:var(--paper);}
.btn-light{background:var(--on-night);color:var(--night);border-color:var(--on-night);}
.btn-light:hover{background:var(--brand-soft);border-color:var(--brand-soft);color:var(--night);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--brand);
  font-size:14px;
  font-weight:600;
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.link-more i{font-style:normal;transition:transform .22s var(--ease);}
.link-more:hover{color:var(--brand-700);border-bottom-color:var(--brand-700);}
.link-more:hover i{transform:translateX(4px);}

/* ---------- 面包屑 ---------- */
.crumbs{
  padding:26px 0 0;
  font-size:12px;
  letter-spacing:.04em;
  color:var(--ink-500);
}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs li+li::before{content:"/";color:var(--line);}
.crumbs a{color:var(--ink-500);transition:color .22s var(--ease);}
.crumbs a:hover{color:var(--brand);}
.crumbs .current{color:var(--ink-700);}

/* ---------- 分类头部 ---------- */
.page-hero{padding:34px 0 0;}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr);
  gap:clamp(28px,4vw,56px);
  align-items:start;
  padding-bottom:clamp(36px,5vw,56px);
  border-bottom:1px solid var(--line);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  letter-spacing:.18em;
  color:var(--accent);
  background:var(--accent-soft);
  border-radius:var(--r-pill);
  padding:6px 14px;
  margin-bottom:22px;
}
.eyebrow::before{
  content:"";
  width:5px;height:5px;
  border-radius:50%;
  background:var(--accent);
}
.page-hero h1{
  font-size:clamp(32px,5vw,56px);
  line-height:1.14;
  letter-spacing:-.01em;
  overflow-wrap:break-word;
}
.page-hero h1 em{
  font-style:normal;
  color:var(--brand);
}
.hero-lead{
  margin-top:20px;
  max-width:640px;
  font-size:16px;
  line-height:1.9;
  color:var(--ink-500);
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:30px;
}
.hero-card{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--paper-2);
  padding:26px 24px;
  box-shadow:var(--shadow-1);
}
.hero-card h2{
  font-size:15px;
  letter-spacing:.1em;
  color:var(--ink-500);
  font-family:var(--sans);
  font-weight:600;
  margin-bottom:18px;
}
.hero-card dl{margin:0;display:grid;gap:16px;}
.hero-card .row{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
}
.hero-card .row:last-child{border-bottom:0;padding-bottom:0;}
.hero-card dt{font-size:13px;color:var(--ink-500);}
.hero-card dd{
  margin:0;
  font-family:var(--num);
  font-variant-numeric:tabular-nums;
  font-size:17px;
  font-weight:600;
  color:var(--ink-900);
  text-align:right;
}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sec) 0;}
.section-tight{padding:clamp(48px,6vw,72px) 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  margin-bottom:clamp(28px,4vw,44px);
}
.section-head h2{font-size:clamp(26px,3.2vw,38px);line-height:1.22;}
.section-head .sub{
  font-size:14px;
  color:var(--ink-500);
  max-width:420px;
  line-height:1.8;
}
.sec-index{
  display:block;
  font-family:var(--num);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--brand);
  margin-bottom:14px;
}

/* ---------- 双列对照 ---------- */
.compare{
  display:grid;
  grid-template-columns:1fr 1fr;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--paper-2);
  overflow:hidden;
}
.compare-col{
  padding:clamp(26px,3vw,40px);
  position:relative;
}
.compare-col+.compare-col{border-left:1px solid var(--line);}
.compare-col h3{
  font-size:22px;
  margin-bottom:10px;
}
.compare-col .col-note{
  font-size:14px;
  color:var(--ink-500);
  line-height:1.8;
  margin-bottom:24px;
}
.point-list{display:grid;gap:18px;}
.point-list li{
  display:grid;
  grid-template-columns:22px 1fr;
  gap:12px;
  font-size:15px;
  line-height:1.8;
  color:var(--ink-700);
}
.point-list svg{
  margin-top:6px;
  color:var(--brand);
  flex-shrink:0;
}
.compare-tag{
  display:inline-block;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--accent);
  background:var(--accent-soft);
  border-radius:var(--r-pill);
  padding:5px 12px;
  margin-bottom:16px;
}

/* ---------- 数据条 ---------- */
.stat-list{
  display:grid;
  gap:0;
  border-top:1px solid var(--line);
}
.stat-line{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:24px;
  padding:24px 0;
  border-bottom:1px solid var(--line);
  transition:padding-left .22s var(--ease);
}
.stat-line:hover{padding-left:8px;}
.stat-line .label{
  font-size:15px;
  color:var(--ink-700);
  display:flex;
  align-items:baseline;
  gap:12px;
}
.stat-line .label span{
  font-family:var(--num);
  font-size:12px;
  color:var(--brand);
  letter-spacing:.14em;
}
.stat-line .value{
  font-family:var(--num);
  font-variant-numeric:tabular-nums;
  font-size:clamp(28px,3.4vw,40px);
  font-weight:600;
  color:var(--ink-900);
  line-height:1;
  white-space:nowrap;
}
.stat-line .value small{
  font-family:var(--sans);
  font-size:13px;
  font-weight:400;
  color:var(--ink-500);
  margin-left:6px;
}

/* ---------- 物料图文 ---------- */
.material-grid{
  display:grid;
  grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);
  gap:clamp(28px,4vw,56px);
  align-items:center;
}
.material-figure{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--paper-2);
}
.material-figure::after{
  content:"";
  position:absolute;
  inset:12px;
  border:1px solid var(--brand);
  opacity:.5;
  pointer-events:none;
  border-radius:var(--r-card);
}
.material-figure img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
}
.material-body h2{font-size:clamp(24px,3vw,34px);margin-bottom:16px;}
.material-body p{
  font-size:15px;
  line-height:1.9;
  color:var(--ink-500);
  margin-bottom:24px;
}
.material-items{display:grid;gap:0;border-top:1px solid var(--line);}
.material-items li{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:18px;
  padding:16px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;
  color:var(--ink-700);
}
.material-items li b{
  font-family:var(--num);
  font-weight:600;
  color:var(--ink-900);
  font-size:13px;
  letter-spacing:.06em;
}

/* ---------- 流程 ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}
.step{
  padding-top:22px;
  border-top:1px solid var(--line);
  transition:border-color .22s var(--ease);
}
.step:hover{border-top-color:var(--brand);}
.step .no{
  display:block;
  font-family:var(--serif);
  font-style:italic;
  font-size:22px;
  color:var(--brand);
  margin-bottom:12px;
  letter-spacing:.04em;
}
.step h3{font-size:19px;margin-bottom:10px;}
.step p{font-size:14px;line-height:1.85;color:var(--ink-500);}

/* ---------- FAQ ---------- */
.faq-grid{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:clamp(28px,4vw,56px);
  align-items:start;
}
.faq-aside{position:sticky;top:110px;}
.faq-aside h2{font-size:clamp(26px,3.2vw,38px);margin-bottom:14px;}
.faq-aside p{font-size:14px;line-height:1.85;color:var(--ink-500);margin-bottom:24px;}
.faq-contact{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--paper-2);
  padding:22px;
}
.faq-contact .tag{
  display:inline-block;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--accent);
  background:var(--accent-soft);
  border-radius:var(--r-pill);
  padding:4px 12px;
  margin-bottom:12px;
}
.faq-contact strong{
  display:block;
  font-family:var(--num);
  font-size:19px;
  color:var(--ink-900);
  letter-spacing:.02em;
  margin-bottom:6px;
}
.faq-contact span{font-size:13px;color:var(--ink-500);line-height:1.7;display:block;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-trigger{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  width:100%;
  min-height:64px;
  padding:18px 0;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--ink-900);
  font-family:var(--serif);
  transition:color .22s var(--ease);
}
.faq-trigger:hover{color:var(--brand);}
.faq-icon{
  position:relative;
  flex-shrink:0;
  width:18px;height:18px;
  transition:transform .26s var(--ease);
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  top:50%;left:0;
  width:18px;height:1.5px;
  background:var(--brand);
  transition:transform .26s var(--ease);
}
.faq-icon::after{transform:rotate(90deg);}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-answer{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .26s var(--ease);
}
.faq-item.is-open .faq-answer{grid-template-rows:1fr;}
.faq-answer-inner{overflow:hidden;}
.faq-answer p{
  font-size:15px;
  line-height:1.9;
  color:var(--ink-500);
  padding:0 0 22px;
  max-width:720px;
}

/* ---------- CTA 窄条 ---------- */
.cta-band{
  background:var(--night);
  color:var(--on-night);
  border-top:1px solid var(--line);
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
  padding:clamp(30px,4vw,48px) 0;
}
.cta-inner h2{
  color:var(--on-night);
  font-size:clamp(22px,2.6vw,30px);
  line-height:1.3;
  margin-bottom:8px;
}
.cta-inner p{font-size:14px;color:var(--on-night-dim);line-height:1.8;max-width:560px;}

/* ---------- 相关分类 ---------- */
.related{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  border-top:1px solid var(--line);
  padding-top:26px;
}
.related a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:16px 18px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--paper-2);
  font-size:15px;
  color:var(--ink-700);
  transition:border-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.related a i{font-style:normal;color:var(--brand);transition:transform .22s var(--ease);}
.related a:hover{
  border-color:var(--brand);
  color:var(--ink-900);
  transform:translateY(-2px);
  box-shadow:var(--shadow-1);
}
.related a:hover i{transform:translateX(4px);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--night);
  color:var(--on-night-dim);
  border-top:1px solid rgba(241,233,220,.12);
  padding:clamp(48px,6vw,80px) 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
  gap:clamp(24px,3vw,48px);
  padding-bottom:40px;
  border-bottom:1px solid rgba(241,233,220,.12);
}
.footer-brand .logo-text{
  font-family:var(--serif);
  font-size:21px;
  font-weight:700;
  color:var(--on-night);
  display:inline-block;
  margin-bottom:14px;
}
.footer-brand p{
  font-size:14px;
  line-height:1.85;
  color:var(--on-night-dim);
  max-width:340px;
}
.footer-social{display:flex;gap:12px;margin-top:20px;}
.footer-social a{
  width:36px;height:36px;
  display:flex;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(241,233,220,.2);
  border-radius:var(--r-btn);
  color:var(--on-night);
  transition:border-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.footer-social a:hover{border-color:var(--brand);color:var(--brand-soft);transform:translateY(-2px);}
.footer-col h4{
  color:var(--on-night);
  font-family:var(--sans);
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col li{font-size:14px;line-height:1.75;color:var(--on-night-dim);}
.footer-col a{color:var(--on-night-dim);transition:color .22s var(--ease);}
.footer-col a:hover{color:var(--on-night);}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-top:22px;
  font-size:13px;
  color:var(--on-night-dim);
}
.footer-bottom nav{display:flex;gap:18px;}
.footer-bottom a{color:var(--on-night-dim);transition:color .22s var(--ease);}
.footer-bottom a:hover{color:var(--on-night);}

/* ---------- 滚动入场 ---------- */
.js .reveal{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .6s ease-out,transform .6s ease-out;
}
.js .reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .site-nav ul{gap:20px;}
  .site-nav a{font-size:14px;}
  .related{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:992px){
  :root{--sec:72px;}
  .site-nav,.nav-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .brand .logo-text{font-size:19px;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-card{order:2;}
  .compare{grid-template-columns:1fr;}
  .compare-col+.compare-col{border-left:0;border-top:1px solid var(--line);}
  .material-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .faq-grid{grid-template-columns:1fr;}
  .faq-aside{position:static;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:768px){
  :root{--sec:56px;}
  .topbar-inner{font-size:12px;}
  .topbar-inner span{max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .brand-sub{display:none;}
  .page-hero h1{font-size:clamp(28px,7vw,38px);}
  .hero-lead{font-size:15px;}
  .hero-actions .btn{width:100%;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .stat-line{flex-direction:column;align-items:flex-start;gap:8px;}
  .stat-line .value{font-size:32px;}
  .related{grid-template-columns:1fr;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-inner .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .steps{grid-template-columns:1fr;}
  .material-items li{flex-direction:column;align-items:flex-start;gap:4px;}
  .drawer-nav a{font-size:23px;}
  .hero-card .row{flex-direction:column;align-items:flex-start;gap:4px;}
  .hero-card dd{text-align:left;font-size:16px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js .reveal{opacity:1;transform:none;}
  .drawer-nav li{opacity:1;transform:none;}
}

/* roulang page: category4 */
:root{
  --ink-900:#17140F;
  --ink-700:#3A342C;
  --ink-500:#6B6355;
  --paper:#F6F1E7;
  --paper-2:#FBF8F2;
  --line:#E2D9C9;
  --brand:#BF4B22;
  --brand-700:#9E3A17;
  --brand-soft:#F3E1D5;
  --accent:#2E4A3D;
  --accent-soft:#DDE6DF;
  --night:#14110E;
  --night-2:#1D1915;
  --on-night:#F1E9DC;
  --on-night-dim:#A79C8B;
  --success:#3F7A55;
  --warning:#B8862A;
  --error:#B33A2B;
  --radius-card:4px;
  --radius-btn:2px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(23,20,15,.04),0 8px 24px -12px rgba(23,20,15,.10);
  --shadow-2:0 12px 36px -16px rgba(23,20,15,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --num:"Inter","Helvetica Neue",Arial,sans-serif;
  --container:1200px;
  --gap:24px;
  --section-pc:96px;
  --section-mb:56px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:1;
  opacity:.035;
  background-image:
    radial-gradient(rgba(23,20,15,.55) .5px,transparent .6px),
    radial-gradient(rgba(23,20,15,.35) .5px,transparent .6px);
  background-size:3px 3px,7px 7px;
  background-position:0 0,2px 3px;
}
h1,h2,h3,h4{
  font-family:var(--serif);
  margin:0;
  font-weight:700;
  color:var(--ink-900);
}
h1{font-size:clamp(30px,4.6vw,56px);line-height:1.14;letter-spacing:-.01em}
h2{font-size:clamp(26px,3.4vw,40px);line-height:1.2}
h3{font-size:21px;line-height:1.4}
h4{font-size:16px;line-height:1.5}
p{margin:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-inline:clamp(20px,4vw,40px);
}
.serif{font-family:var(--serif)}
.num{font-family:var(--num);font-variant-numeric:tabular-nums}
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--brand);
  text-transform:uppercase;
}
.lead{
  color:var(--ink-500);
  font-size:16px;
  line-height:1.9;
}
/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--night);
  color:var(--on-night-dim);
  font-size:13px;
  min-height:34px;
  display:flex;
  align-items:center;
}
.topbar .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:34px;
  width:100%;
}
.topbar-text{letter-spacing:.02em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-link{
  color:var(--on-night);
  display:inline-flex;
  align-items:center;
  gap:6px;
  white-space:nowrap;
  transition:color 220ms var(--ease);
}
.topbar-link:hover{color:var(--brand)}
/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,241,231,.92);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow 220ms var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1)}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:76px;
  transition:min-height 220ms var(--ease);
}
.site-header.is-scrolled .header-inner{min-height:64px}
.brand{
  display:flex;
  align-items:center;
  gap:16px;
  flex-shrink:0;
}
.brand-name{
  font-family:var(--serif);
  font-size:23px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--ink-900);
  white-space:nowrap;
  line-height:1.2;
}
.brand-divider{
  width:1px;
  height:30px;
  background:var(--line);
}
.brand-sub{
  font-size:12px;
  color:var(--ink-500);
  letter-spacing:.06em;
  white-space:nowrap;
  line-height:1.5;
}
.site-nav ul{
  display:flex;
  align-items:center;
  gap:clamp(12px,2.2vw,30px);
}
.site-nav a{
  position:relative;
  display:inline-block;
  padding:10px 2px;
  font-size:15px;
  color:var(--ink-700);
  white-space:nowrap;
  transition:color 220ms var(--ease);
}
.site-nav a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:2px;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform 220ms var(--ease);
}
.site-nav a:hover{color:var(--ink-900)}
.site-nav a:hover::after{transform:scaleX(1)}
.site-nav a.is-active{color:var(--ink-900);font-weight:500}
.site-nav a.is-active::after{transform:scaleX(1)}
.nav-cta{flex-shrink:0}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  align-items:center;
  justify-content:center;
  border-radius:var(--radius-btn);
  color:var(--ink-900);
}
.burger{position:relative;width:22px;height:14px;display:block}
.burger span{
  position:absolute;
  left:0;
  width:22px;
  height:2px;
  background:currentColor;
  transition:transform 220ms var(--ease),opacity 180ms var(--ease),top 220ms var(--ease);
}
.burger span:nth-child(1){top:0}
.burger span:nth-child(2){top:6px}
.burger span:nth-child(3){top:12px}
body.drawer-open .burger span:nth-child(1){top:6px;transform:rotate(45deg)}
body.drawer-open .burger span:nth-child(2){opacity:0}
body.drawer-open .burger span:nth-child(3){top:6px;transform:rotate(-45deg)}
/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;
  inset:0;
  z-index:70;
  background:var(--night);
  color:var(--on-night);
  display:flex;
  flex-direction:column;
  padding:28px clamp(20px,6vw,40px) 24px;
  transform:translateY(-100%);
  visibility:hidden;
  transition:transform 320ms var(--ease),visibility 320ms;
}
body.drawer-open .drawer{transform:translateY(0);visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:20px;border-bottom:1px solid rgba(241,233,220,.14)}
.drawer-brand{font-family:var(--serif);font-size:22px;font-weight:700;color:var(--on-night)}
.drawer-close{width:44px;height:44px;display:flex;align-items:center;justify-content:center;color:var(--on-night)}
.drawer-nav{margin-top:24px;flex:1;overflow-y:auto}
.drawer-nav li{
  opacity:0;
  transform:translateY(14px);
  transition:opacity 400ms var(--ease),transform 400ms var(--ease);
}
body.drawer-open .drawer-nav li{opacity:1;transform:translateY(0)}
.drawer-nav li:nth-child(1){transition-delay:40ms}
.drawer-nav li:nth-child(2){transition-delay:80ms}
.drawer-nav li:nth-child(3){transition-delay:120ms}
.drawer-nav li:nth-child(4){transition-delay:160ms}
.drawer-nav li:nth-child(5){transition-delay:200ms}
.drawer-nav li:nth-child(6){transition-delay:240ms}
.drawer-nav a{
  display:block;
  padding:16px 0;
  font-family:var(--serif);
  font-size:26px;
  color:var(--on-night);
  border-bottom:1px solid rgba(241,233,220,.10);
}
.drawer-nav a.is-active{color:var(--brand-soft)}
.drawer-foot{padding-top:20px;border-top:1px solid rgba(241,233,220,.14)}
.drawer-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}
.drawer-actions a{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  font-size:14px;
  border-radius:var(--radius-btn);
  border:1px solid rgba(241,233,220,.4);
  color:var(--on-night);
}
.drawer-actions a.primary{background:var(--brand);border-color:var(--brand);color:var(--paper-2)}
.drawer-note{font-size:12px;color:var(--on-night-dim);line-height:1.7}
/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:48px;
  padding:0 28px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:500;
  letter-spacing:.02em;
  transition:background-color 220ms var(--ease),color 220ms var(--ease),transform 220ms var(--ease),border-color 220ms var(--ease);
  cursor:pointer;
}
.btn-primary{background:var(--brand);color:var(--paper-2);border:1px solid var(--brand)}
.btn-primary:hover{background:var(--brand-700);border-color:var(--brand-700);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink-900);border:1px solid var(--ink-900)}
.btn-ghost:hover{background:var(--ink-900);color:var(--paper-2);transform:translateY(-1px)}
.btn-sm{min-height:42px;padding:0 20px;font-size:14px}
.btn-block{width:100%}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--brand);
  font-weight:500;
}
.link-arrow svg{transition:transform 220ms var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}
/* ---------- 面包屑 ---------- */
.breadcrumb{
  padding:22px 0 0;
  font-size:12px;
  letter-spacing:.04em;
  color:var(--ink-500);
}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--ink-500);opacity:.6}
.breadcrumb a{color:var(--ink-500);transition:color 200ms var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb [aria-current]{color:var(--ink-700)}
/* ---------- 分类头部 ---------- */
.cat-hero{padding:36px 0 0}
.cat-hero-grid{
  display:grid;
  grid-template-columns:minmax(0,7.2fr) minmax(0,4.8fr);
  gap:clamp(28px,4vw,56px);
  align-items:end;
}
.cat-hero h1{margin-top:14px;max-width:16em}
.cat-hero .lead{margin-top:20px;max-width:36em;font-size:16.5px}
.cat-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.data-mini{
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 24px;
  box-shadow:var(--shadow-1);
}
.data-mini h2{
  font-size:13px;
  font-family:var(--sans);
  letter-spacing:.12em;
  color:var(--ink-500);
  font-weight:500;
  text-transform:uppercase;
}
.data-mini ul{margin-top:15px}
.data-mini li{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding:12px 0;
  border-bottom:1px solid var(--line);
  font-size:14px;
  color:var(--ink-700);
}
.data-mini li:last-child{border-bottom:0;padding-bottom:0}
.data-mini .v{
  font-family:var(--num);
  font-variant-numeric:tabular-nums;
  font-size:22px;
  font-weight:600;
  color:var(--brand);
  letter-spacing:-.01em;
  white-space:nowrap;
}
.data-mini .v small{font-size:12px;font-weight:500;color:var(--ink-500);margin-left:2px}
/* ---------- 板块 ---------- */
.section{padding-block:var(--section-pc)}
.section-tight{padding-block:clamp(44px,6vw,72px)}
.section-night{
  background:var(--night);
  color:var(--on-night);
}
.section-night h2,.section-night h3{color:var(--on-night)}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  margin-bottom:36px;
}
.section-head p{max-width:34em;color:var(--ink-500);font-size:15px;margin-top:14px}
.section-night .section-head p{color:var(--on-night-dim)}
/* ---------- 权益对照表 ---------- */
.table-scroll{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--paper-2);
}
.compare{
  width:100%;
  min-width:720px;
  border-collapse:collapse;
  font-size:15px;
}
.compare caption{
  text-align:left;
  padding:24px 24px 8px;
  font-size:13px;
  color:var(--ink-500);
  letter-spacing:.04em;
}
.compare thead th{
  position:relative;
  text-align:left;
  padding:20px 24px;
  background:var(--paper-2);
  border-bottom:1px solid var(--line);
  font-family:var(--serif);
  font-size:17px;
  color:var(--ink-900);
  vertical-align:bottom;
}
.compare thead th:first-child{
  font-family:var(--sans);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--ink-500);
  font-weight:500;
  width:22%;
}
.compare thead th .tier{
  display:inline-block;
  font-family:var(--sans);
  font-size:11px;
  letter-spacing:.1em;
  padding:3px 10px;
  border-radius:var(--radius-pill);
  margin-bottom:8px;
  color:var(--accent);
  background:var(--accent-soft);
}
.compare thead th .tier.hot{color:var(--brand);background:var(--brand-soft)}
.compare thead th small{
  display:block;
  font-family:var(--sans);
  font-size:12px;
  font-weight:400;
  color:var(--ink-500);
  margin-top:4px;
  line-height:1.6;
}
.compare tbody th{
  text-align:left;
  padding:0 24px;
  height:56px;
  font-family:var(--sans);
  font-weight:500;
  font-size:14px;
  color:var(--ink-700);
  border-bottom:1px solid var(--line);
  background:var(--paper-2);
  white-space:nowrap;
}
.compare tbody td{
  padding:0 24px;
  height:56px;
  border-bottom:1px solid var(--line);
  color:var(--ink-700);
  line-height:1.5;
  vertical-align:middle;
}
.compare tbody tr:last-child th,
.compare tbody tr:last-child td{border-bottom:0}
.compare tbody tr:hover th,
.compare tbody tr:hover td{background:var(--paper)}
.compare td .tick{
  display:inline-block;
  width:14px;
  height:14px;
  margin-right:8px;
  vertical-align:-2px;
  flex-shrink:0;
}
.table-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:28px;
}
.table-note{
  margin-top:16px;
  font-size:13px;
  color:var(--ink-500);
  line-height:1.8;
}
/* ---------- 流程四格 ---------- */
.flow{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:0 var(--gap);
  margin-top:8px;
}
.flow-item{
  border-top:1px solid var(--line);
  padding-top:22px;
}
.flow-item .no{
  font-family:var(--serif);
  font-style:italic;
  font-size:22px;
  color:var(--brand);
  letter-spacing:.02em;
}
.flow-item h3{font-size:18px;margin-top:10px}
.flow-item p{font-size:14px;color:var(--ink-500);margin-top:10px;line-height:1.8}
/* ---------- 案例卡 ---------- */
.case-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:var(--gap);
}
.case-card{
  position:relative;
  display:block;
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:border-color 220ms var(--ease),transform 220ms var(--ease),box-shadow 220ms var(--ease);
}
.case-card:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--shadow-1)}
.case-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--night-2)}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform 480ms var(--ease)}
.case-card:hover .case-media img{transform:scale(1.03)}
.case-body{padding:20px 20px 22px}
.case-body h3{font-size:19px}
.case-body p{font-size:14px;color:var(--ink-500);margin-top:10px;line-height:1.8}
.case-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.tag{
  display:inline-flex;
  align-items:center;
  font-size:12px;
  letter-spacing:.06em;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  background:var(--accent-soft);
  color:var(--accent);
  white-space:nowrap;
}
.tag.brand{background:var(--brand-soft);color:var(--brand)}
.case-meta .arrow{color:var(--brand);display:inline-flex;transition:transform 220ms var(--ease)}
.case-card:hover .case-meta .arrow{transform:translateX(4px)}
/* ---------- FAQ ---------- */
.faq-grid{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:clamp(28px,4vw,56px);
  align-items:start;
}
.faq-aside{position:sticky;top:104px}
.faq-aside p{color:var(--ink-500);font-size:15px;margin-top:14px;max-width:22em}
.faq-card{
  margin-top:24px;
  padding:20px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--paper-2);
}
.faq-card dt{font-size:12px;letter-spacing:.1em;color:var(--ink-500)}
.faq-card dd{margin:6px 0 0;font-family:var(--num);font-size:17px;color:var(--ink-900);letter-spacing:.01em}
.faq-card .link-arrow{margin-top:14px;font-size:13px}
.acc-item{
  border-bottom:1px solid var(--line);
}
.acc-item:first-child{border-top:1px solid var(--line)}
.acc-btn{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:20px 0;
  min-height:64px;
  text-align:left;
  font-size:17px;
  font-family:var(--serif);
  font-weight:700;
  color:var(--ink-900);
  transition:color 220ms var(--ease);
}
.acc-btn:hover{color:var(--brand)}
.acc-icon{
  position:relative;
  width:16px;
  height:16px;
  flex-shrink:0;
  transition:transform 260ms var(--ease);
}
.acc-icon::before,.acc-icon::after{
  content:"";
  position:absolute;
  background:var(--brand);
}
.acc-icon::before{left:0;top:7px;width:16px;height:2px}
.acc-icon::after{left:7px;top:0;width:2px;height:16px}
.acc-btn[aria-expanded="true"] .acc-icon{transform:rotate(45deg)}
.acc-panel{
  max-height:0;
  overflow:hidden;
  transition:max-height 260ms var(--ease);
}
.acc-panel-inner{
  padding:0 0 22px;
  font-size:15px;
  line-height:1.9;
  color:var(--ink-500);
  max-width:52em;
}
/* ---------- CTA 窄条 ---------- */
.cta-band{
  background:var(--night);
  color:var(--on-night);
  border-radius:var(--radius-card);
  padding:clamp(28px,4vw,44px) clamp(24px,4vw,44px);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);color:var(--on-night)}
.cta-band p{color:var(--on-night-dim);font-size:14px;margin-top:10px;max-width:36em}
.cta-band .btn-primary:hover{background:var(--brand-soft);border-color:var(--brand-soft);color:var(--brand-700)}
/* ---------- 相关分类 ---------- */
.related{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 22px;
  padding:28px 0 0;
  border-top:1px solid var(--line);
  margin-top:clamp(40px,5vw,64px);
}
.related .label{font-size:12px;letter-spacing:.12em;color:var(--ink-500)}
.related a{
  font-size:14px;
  color:var(--ink-700);
  border-bottom:1px solid transparent;
  transition:color 200ms var(--ease),border-color 200ms var(--ease);
}
.related a:hover{color:var(--brand);border-color:var(--brand)}
/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--night);
  color:var(--on-night);
  border-top:1px solid rgba(241,233,220,.12);
  margin-top:clamp(56px,7vw,96px);
  padding-top:clamp(48px,6vw,72px);
  position:relative;
  z-index:2;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
  gap:clamp(24px,3.4vw,48px);
  padding-bottom:44px;
}
.logo-text{
  font-family:var(--serif);
  font-size:24px;
  font-weight:700;
  color:var(--on-night);
  letter-spacing:.02em;
}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  line-height:1.85;
  color:var(--on-night-dim);
  max-width:26em;
}
.footer-social{display:flex;gap:12px;margin-top:22px}
.footer-social a{
  width:36px;
  height:36px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(241,233,220,.22);
  border-radius:var(--radius-card);
  color:var(--on-night-dim);
  transition:color 200ms var(--ease),border-color 200ms var(--ease);
}
.footer-social a:hover{color:var(--brand);border-color:var(--brand)}
.footer-col h4{
  font-size:14px;
  letter-spacing:.06em;
  color:var(--on-night);
  font-family:var(--sans);
  font-weight:500;
}
.footer-col ul{margin-top:16px;display:grid;gap:10px}
.footer-col li,.footer-col a{
  font-size:14px;
  color:var(--on-night-dim);
  line-height:1.7;
  transition:color 200ms var(--ease);
}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  border-top:1px solid rgba(241,233,220,.12);
  padding:22px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--on-night-dim);
}
.footer-bottom nav{display:flex;gap:20px;flex-wrap:wrap}
.footer-bottom a{color:var(--on-night-dim);transition:color 200ms var(--ease)}
.footer-bottom a:hover{color:var(--brand)}
/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity 600ms ease-out,transform 600ms ease-out}
.reveal.is-visible{opacity:1;transform:none}
.reveal.d1{transition-delay:70ms}
.reveal.d2{transition-delay:140ms}
.reveal.d3{transition-delay:210ms}
/* ---------- 响应式 ---------- */
@media (min-width:1440px){
  :root{--container:1280px}
}
@media (max-width:1199px){
  .case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px var(--gap)}
}
@media (max-width:992px){
  .site-nav,.nav-cta{display:none}
  .nav-toggle{display:inline-flex}
  .brand-sub,.brand-divider{display:none}
  .cat-hero-grid{grid-template-columns:1fr;align-items:start}
  .faq-grid{grid-template-columns:1fr}
  .faq-aside{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section{padding-block:var(--section-mb)}
  .topbar-text{display:none}
  .topbar .container{justify-content:flex-end}
}
@media (max-width:767px){
  h1{font-size:clamp(28px,7.4vw,38px)}
  .cat-hero{padding-top:26px}
  .case-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr;gap:24px}
  .faq-aside{position:static}
  .cta-band{flex-direction:column;align-items:flex-start}
  .cta-band .btn{width:100%}
  .table-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .header-inner{min-height:64px}
  .brand-name{font-size:20px}
  .compare{font-size:14px}
}
@media (max-width:520px){
  :root{--gap:16px}
  .cat-hero-actions{flex-direction:column;align-items:stretch}
  .cat-hero-actions .btn{width:100%}
  .data-mini{padding:20px}
  .drawer-nav a{font-size:23px;padding:14px 0}
  .drawer-actions{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms!important;
    transition-duration:.001ms!important;
  }
  .reveal{opacity:1;transform:none}
  .drawer-nav li{opacity:1;transform:none}
}

/* roulang page: category5 */
:root{
  --ink-900:#17140F;--ink-700:#3A342C;--ink-500:#6B6355;
  --paper:#F6F1E7;--paper-2:#FBF8F2;--line:#E2D9C9;
  --brand:#BF4B22;--brand-700:#9E3A17;--brand-soft:#F3E1D5;
  --accent:#2E4A3D;--accent-soft:#DDE6DF;
  --night:#14110E;--night-2:#1D1915;--on-night:#F1E9DC;--on-night-dim:#A79C8B;
  --ok:#3F7A55;--warn:#B8862A;--err:#B33A2B;
  --r-card:4px;--r-btn:2px;--r-pill:999px;
  --shadow-1:0 1px 2px rgba(23,20,15,.04),0 8px 24px -12px rgba(23,20,15,.10);
  --shadow-2:0 12px 36px -16px rgba(23,20,15,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --num:"Inter","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink-900);
  font-family:var(--sans);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
body.is-locked{overflow:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700}
p{margin:0}
.serif{font-family:var(--serif)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 clamp(20px,4vw,40px)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand);outline-offset:3px;border-radius:2px;
}
.skip-link{position:absolute;left:16px;top:-60px;background:var(--ink-900);color:var(--paper-2);padding:10px 18px;border-radius:2px;z-index:500;transition:top .2s var(--ease)}
.skip-link:focus{top:12px}

/* ============ 顶部信息条 ============ */
.topbar{background:var(--night);color:var(--on-night-dim);font-size:13px;letter-spacing:.04em}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;height:34px}
.topbar-link{color:var(--on-night);transition:color .22s var(--ease)}
.topbar-link:hover{color:var(--brand-soft)}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,241,231,.92);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease);
}
.site-header.is-stuck{box-shadow:var(--shadow-1)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:78px;transition:height .22s var(--ease)}
.site-header.is-stuck .nav-wrap{height:64px}
.brand{display:flex;align-items:center;gap:14px;min-width:0;flex-shrink:0}
.logo-text{font-family:var(--serif);font-size:22px;font-weight:700;letter-spacing:.02em;white-space:nowrap;color:var(--ink-900)}
.brand-divider{width:1px;height:26px;background:var(--line);flex-shrink:0}
.brand-sub{font-size:12px;line-height:1.5;color:var(--ink-500);letter-spacing:.05em;white-space:nowrap}
.site-nav ul{display:flex;align-items:center;gap:26px}
.site-nav a{position:relative;display:inline-block;padding:6px 0;font-size:15px;color:var(--ink-700);transition:color .22s var(--ease);white-space:nowrap}
.site-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.site-nav a:hover,.site-nav a.is-active{color:var(--ink-900)}
.site-nav a:hover::after,.site-nav a.is-active::after{transform:scaleX(1)}
.site-nav a.is-active{font-weight:600}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;letter-spacing:.02em;
  border:1px solid transparent;background:none;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-primary{background:var(--brand);color:var(--paper-2)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--ink-900);color:var(--ink-900)}
.btn-ghost:hover{background:var(--ink-900);color:var(--paper-2)}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.btn-block{width:100%}
.link-arrow{display:inline-flex;align-items:center;gap:7px;color:var(--brand);font-size:14px;font-weight:500}
.link-arrow .arw{transition:transform .22s var(--ease)}
.link-arrow:hover .arw{transform:translateX(4px)}

/* ============ 汉堡与抽屉 ============ */
.nav-toggle{
  display:none;width:44px;height:44px;border:0;background:none;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;flex-shrink:0;
}
.nav-toggle span{display:block;width:22px;height:1.6px;background:var(--ink-900);transition:transform .28s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg)}
.drawer{
  position:fixed;inset:0;z-index:200;background:var(--night);
  padding:24px clamp(20px,6vw,32px) 32px;
  display:flex;flex-direction:column;
  transform:translateY(-101%);visibility:hidden;
  transition:transform .34s var(--ease),visibility .34s;
  overflow-y:auto;
}
.drawer.is-open{transform:translateY(0);visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.drawer-top .logo-text{color:var(--on-night)}
.drawer-close{width:44px;height:44px;background:none;border:1px solid rgba(241,233,220,.24);border-radius:2px;color:var(--on-night);display:grid;place-items:center;font-size:20px;line-height:1}
.drawer-nav{display:grid;gap:2px}
.drawer-nav li{opacity:0;transform:translateY(16px);transition:opacity .34s var(--ease),transform .34s var(--ease)}
.drawer.is-open .drawer-nav li{opacity:1;transform:none}
.drawer.is-open .drawer-nav li:nth-child(1){transition-delay:.06s}
.drawer.is-open .drawer-nav li:nth-child(2){transition-delay:.10s}
.drawer.is-open .drawer-nav li:nth-child(3){transition-delay:.14s}
.drawer.is-open .drawer-nav li:nth-child(4){transition-delay:.18s}
.drawer.is-open .drawer-nav li:nth-child(5){transition-delay:.22s}
.drawer.is-open .drawer-nav li:nth-child(6){transition-delay:.26s}
.drawer-nav a{
  display:block;font-family:var(--serif);font-size:26px;line-height:1.4;
  color:var(--on-night);padding:12px 0;border-bottom:1px solid rgba(241,233,220,.12);
}
.drawer-nav a.is-active{color:var(--brand-soft)}
.drawer-foot{margin-top:auto;padding-top:32px;display:grid;gap:12px}
.drawer-foot .btn{width:100%}
.drawer-foot .btn-line{border:1px solid rgba(241,233,220,.3);color:var(--on-night);background:none}
.drawer-foot .btn-line:hover{background:rgba(241,233,220,.1)}
.drawer-meta{font-size:12px;color:var(--on-night-dim);letter-spacing:.04em;line-height:1.7;margin-top:6px}

/* ============ 面包屑 ============ */
.breadcrumb{padding:26px 0 0}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;letter-spacing:.04em;color:var(--ink-500)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li:not(:last-child)::after{content:"/";color:var(--line)}
.breadcrumb a{color:var(--ink-500);transition:color .22s var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb [aria-current="page"]{color:var(--ink-700)}

/* ============ 分类头部 ============ */
.cat-hero{padding:clamp(28px,5vw,48px) 0 clamp(40px,6vw,64px);position:relative;overflow:hidden}
.cat-hero::before{
  content:"";position:absolute;right:calc(50% - 640px);top:-120px;width:320px;height:320px;
  background:radial-gradient(circle,rgba(191,75,34,.16),rgba(191,75,34,0) 70%);
  pointer-events:none;
}
.cat-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.65fr) minmax(0,.85fr);gap:clamp(28px,4vw,56px);align-items:end}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.16em;color:var(--brand);font-weight:600}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--brand)}
.cat-hero h1{
  font-family:var(--serif);font-weight:700;
  font-size:clamp(30px,4.4vw,54px);line-height:1.16;letter-spacing:-.01em;
  margin:18px 0 20px;overflow-wrap:break-word;
}
.cat-lead{font-size:16px;line-height:1.9;color:var(--ink-700);max-width:56ch}
.cat-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.meta-line{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:26px;font-size:13px;color:var(--ink-500);font-family:var(--num);font-variant-numeric:tabular-nums}
.meta-line span+span::before{content:"";display:inline-block;width:1px;height:12px;background:var(--line);margin-right:14px;vertical-align:-1px}

.data-card{
  background:var(--night);color:var(--on-night);border-radius:var(--r-card);
  padding:26px 24px;position:relative;overflow:hidden;border:1px solid rgba(241,233,220,.08);
}
.data-card::after{
  content:"";position:absolute;right:-60px;top:-60px;width:180px;height:180px;
  background:radial-gradient(circle,rgba(191,75,34,.35),rgba(191,75,34,0) 70%);pointer-events:none;
}
.data-card h2{font-size:13px;letter-spacing:.12em;color:var(--on-night-dim);font-weight:500;margin-bottom:18px}
.data-card dl{display:grid;gap:16px;margin:0;position:relative;z-index:1}
.data-card dt{font-size:12px;color:var(--on-night-dim);letter-spacing:.06em}
.data-card dd{margin:2px 0 0;font-family:var(--num);font-variant-numeric:tabular-nums;font-size:30px;line-height:1.1;color:var(--on-night)}
.data-card dd em{font-style:normal;font-size:13px;color:var(--on-night-dim);margin-left:6px;font-family:var(--sans)}
.data-card .dq{border-top:1px solid rgba(241,233,220,.14);padding-top:14px;font-size:13px;line-height:1.8;color:var(--on-night-dim)}

/* ============ 通用板块 ============ */
.section{padding:clamp(52px,7vw,88px) 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:clamp(28px,4vw,44px)}
.section-head h2{font-family:var(--serif);font-size:clamp(24px,3.2vw,36px);line-height:1.25;letter-spacing:-.005em}
.section-head p{font-size:14px;color:var(--ink-500);max-width:44ch;margin-top:10px;line-height:1.8}

/* ============ 时间线 ============ */
.timeline-wrap{padding-bottom:clamp(48px,7vw,80px)}
.timeline{position:relative;padding-left:40px}
.timeline::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:1px;background:var(--line)}
.tl-item{position:relative;padding-bottom:clamp(40px,5vw,64px)}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-45px;top:12px;width:11px;height:11px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 4px var(--paper);
}
.tl-body{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,3vw,40px);align-items:stretch}
.tl-media{order:1}
.tl-text{order:2;align-self:center}
.tl-item:nth-child(even) .tl-media{order:2}
.tl-item:nth-child(even) .tl-text{order:1}
.tl-media img{
  width:100%;height:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-card);border:1px solid var(--line);
  transition:transform .3s var(--ease),border-color .3s var(--ease);
}
.tl-item:hover .tl-media img{transform:scale(1.015);border-color:var(--brand)}
.tl-stage{display:inline-block;font-size:12px;letter-spacing:.12em;color:var(--brand);font-weight:600;margin-bottom:12px}
.tl-text h3{font-family:var(--serif);font-size:clamp(20px,2.2vw,26px);line-height:1.4;margin-bottom:12px}
.tl-text p{font-size:15px;line-height:1.9;color:var(--ink-700)}
.tl-text p+p{margin-top:12px}
.quote-card{
  height:100%;background:var(--paper-2);border:1px solid var(--line);border-left:3px solid var(--brand);
  border-radius:var(--r-card);padding:clamp(22px,3vw,32px);display:flex;flex-direction:column;justify-content:center;
  transition:box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.quote-card:hover{box-shadow:var(--shadow-1);border-color:var(--line)}
.quote-card blockquote{margin:0 0 16px;font-family:var(--serif);font-size:clamp(17px,1.8vw,21px);line-height:1.7;color:var(--ink-900)}
.quote-card cite{font-style:normal;font-size:13px;letter-spacing:.04em;color:var(--ink-500)}
.quote-card .qc-tag{display:inline-block;font-size:12px;letter-spacing:.1em;color:var(--accent);background:var(--accent-soft);border-radius:var(--r-pill);padding:4px 12px;margin-bottom:16px;align-self:flex-start}

/* ============ 要点条 ============ */
.facts{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:clamp(40px,5vw,60px) 0}
.facts-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap;margin-bottom:clamp(26px,3vw,38px)}
.facts-head h2{font-family:var(--serif);font-size:clamp(22px,2.8vw,32px);line-height:1.3}
.facts-head p{font-size:14px;color:var(--ink-500);max-width:40ch;line-height:1.8}
.facts-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}
.fact{padding:0 clamp(18px,2.4vw,30px);border-left:1px solid var(--line)}
.fact:first-child{border-left:0;padding-left:0}
.fact:last-child{padding-right:0}
.fact .num{display:block;font-family:var(--serif);font-style:italic;font-size:22px;color:var(--brand);margin-bottom:10px}
.fact h3{font-size:17px;line-height:1.5;margin-bottom:8px;color:var(--ink-900)}
.fact p{font-size:14px;line-height:1.85;color:var(--ink-500)}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,2fr);gap:clamp(28px,4vw,56px);align-items:start}
.faq-aside h2{font-family:var(--serif);font-size:clamp(24px,3vw,34px);line-height:1.3;margin-bottom:12px}
.faq-aside p{font-size:14px;color:var(--ink-500);line-height:1.8}
.faq-note{margin-top:22px;border:1px solid var(--line);border-radius:var(--r-card);padding:18px 20px;background:var(--paper-2)}
.faq-note h3{font-size:14px;margin-bottom:6px}
.faq-note a{color:var(--brand);font-size:14px;font-family:var(--num);font-variant-numeric:tabular-nums}
.faq-note span{display:block;font-size:12px;color:var(--ink-500);margin-top:4px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;background:none;border:0;text-align:left;
  font-size:17px;line-height:1.6;font-weight:500;color:var(--ink-900);
  transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{position:relative;width:16px;height:16px;flex-shrink:0}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand);transition:transform .26s var(--ease),opacity .26s var(--ease)}
.faq-icon::before{left:0;top:7px;width:16px;height:1.6px}
.faq-icon::after{left:7px;top:0;width:1.6px;height:16px}
.faq-q[aria-expanded="true"] .faq-icon::after{transform:rotate(45deg);opacity:0}
.faq-q[aria-expanded="true"] .faq-icon::before{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease)}
.faq-a p{padding:0 0 22px;font-size:15px;line-height:1.9;color:var(--ink-700);max-width:64ch}

/* ============ CTA 窄条 ============ */
.cta-band{background:var(--night);color:var(--on-night);padding:clamp(36px,5vw,52px) 0;position:relative;overflow:hidden}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-100px;width:340px;height:340px;
  background:radial-gradient(circle,rgba(191,75,34,.28),rgba(191,75,34,0) 70%);pointer-events:none;
}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-inner h2{font-family:var(--serif);font-size:clamp(22px,2.8vw,32px);line-height:1.35;margin-bottom:8px}
.cta-inner p{font-size:14px;color:var(--on-night-dim);line-height:1.8;max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-band .btn-primary{box-shadow:none}
.cta-band .btn-line{border:1px solid rgba(241,233,220,.34);color:var(--on-night);background:none}
.cta-band .btn-line:hover{background:rgba(241,233,220,.12);color:var(--on-night)}

/* ============ 相关分类 ============ */
.related{padding:clamp(40px,5vw,64px) 0 0}
.related h2{font-size:14px;letter-spacing:.12em;color:var(--ink-500);font-weight:500;margin-bottom:18px}
.chip-list{display:flex;flex-wrap:wrap;gap:12px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  border:1px solid var(--line);background:var(--paper-2);border-radius:var(--r-pill);
  padding:9px 20px;font-size:14px;color:var(--ink-700);
  transition:border-color .22s var(--ease),color .22s var(--ease),background-color .22s var(--ease),transform .22s var(--ease);
}
.chip:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.chip .arw{color:var(--brand)}

/* ============ 页脚 ============ */
.site-footer{background:var(--night);color:var(--on-night);margin-top:clamp(56px,7vw,88px);padding:clamp(44px,6vw,64px) 0 0;border-top:1px solid rgba(241,233,220,.12)}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.2fr);gap:clamp(28px,4vw,44px)}
.footer-brand .logo-text{color:var(--on-night);font-size:21px}
.footer-brand p{margin:16px 0 20px;font-size:14px;line-height:1.85;color:var(--on-night-dim);max-width:34ch}
.footer-social{display:flex;gap:10px}
.footer-social a{
  width:38px;height:38px;border:1px solid rgba(241,233,220,.2);border-radius:2px;
  display:grid;place-items:center;color:var(--on-night-dim);
  transition:border-color .22s var(--ease),color .22s var(--ease),background-color .22s var(--ease);
}
.footer-social a:hover{border-color:var(--brand);color:var(--brand-soft);background:rgba(241,233,220,.06)}
.footer-col h4{font-size:13px;letter-spacing:.12em;color:var(--on-night-dim);font-weight:500;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px;font-size:14px;color:var(--on-night-dim);line-height:1.7}
.footer-col a{transition:color .22s var(--ease)}
.footer-col a:hover{color:var(--brand-soft)}
.footer-bottom{
  margin-top:clamp(32px,4vw,48px);border-top:1px solid rgba(241,233,220,.12);
  padding:20px 0 26px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--on-night-dim);line-height:1.8;
}
.footer-bottom nav{display:flex;flex-wrap:wrap;gap:18px}
.footer-bottom a{transition:color .22s var(--ease)}
.footer-bottom a:hover{color:var(--brand-soft)}

/* ============ 动效 ============ */
.js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .6s ease-out,transform .6s ease-out}
.js [data-reveal].is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .js [data-reveal]{opacity:1!important;transform:none!important}
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .site-nav ul{gap:18px}
  .brand-sub{display:none}
  .brand-divider{display:none}
}
@media (max-width:992px){
  .site-nav,.nav-actions{display:none}
  .nav-toggle{display:flex}
  .nav-wrap{height:68px}
  .cat-grid{grid-template-columns:1fr;align-items:start}
  .data-card{max-width:420px}
  .faq-wrap{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:768px){
  body{font-size:15px;line-height:1.8}
  .topbar .container{font-size:12px}
  .topbar .container>span:first-child{max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .cat-actions .btn{width:100%}
  .timeline{padding-left:24px}
  .tl-item::before{left:-29px;top:10px;width:9px;height:9px;box-shadow:0 0 0 4px var(--paper)}
  .tl-body{grid-template-columns:1fr;gap:20px}
  .tl-item:nth-child(even) .tl-media,.tl-item:nth-child(even) .tl-text{order:0}
  .tl-media img{aspect-ratio:16/10}
  .facts-grid{grid-template-columns:1fr;gap:24px}
  .fact{border-left:0;padding:0;border-top:1px solid var(--line);padding-top:22px}
  .fact:first-child{border-top:0;padding-top:0}
  .data-card{max-width:none}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .drawer-nav a{font-size:24px}
  .chip{padding:8px 16px;font-size:13px}
  .meta-line{font-size:12px;gap:10px}
  .meta-line span+span::before{margin-right:10px}
}