/* roulang page: index */
:root{
  --ink:#14181B;
  --ink-2:#2A2F33;
  --paper:#F7F4EF;
  --paper-2:#EFEAE2;
  --line:#DED7CB;
  --brand:#B23A2E;
  --brand-hover:#8F2B22;
  --brand-soft:rgba(178,58,46,.10);
  --aux:#2F6F6B;
  --muted:#6B6F73;
  --dark:#14181B;
  --dark-text:#EDEAE4;
  --dark-sub:#9A9E9F;
  --ok:#2F6F6B;
  --warn:#B7791F;
  --err:#B23A2E;
  --r-tag:6px;
  --r-btn:10px;
  --r-card:16px;
  --r-panel:20px;
  --sh-1:0 1px 2px rgba(20,24,27,.06);
  --sh-2:0 10px 28px rgba(20,24,27,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:60px;
  --container:1200px;
  --container-wide:1320px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{
  font-family:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  font-weight:700;
  margin:0;
  letter-spacing:-.02em;
  color:var(--ink);
}
p{margin:0 0 1.2em;}
ul,ol{margin:0;padding:0;list-style:none;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 28px;}
.container-wide{width:100%;max-width:var(--container-wide);margin:0 auto;padding:0 28px;}
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-alt{background:var(--paper-2);}
.rule{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- 通用标题 ---------- */
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head h2{
  font-size:32px;line-height:1.3;position:relative;padding-left:16px;
}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:28px;background:var(--brand);border-radius:2px;
}
.sec-head .sec-sub{margin-top:14px;color:var(--ink-2);font-size:16px;line-height:1.8;}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;}
.sec-head-row .sec-head{margin-bottom:0;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;letter-spacing:.01em;
  border:1.5px solid transparent;cursor:pointer;background:none;
  transition:background-color 200ms var(--ease),color 200ms var(--ease),
             border-color 200ms var(--ease),transform 200ms var(--ease),
             box-shadow 200ms var(--ease);
}
.btn .arrow{transition:transform 200ms var(--ease);}
.btn:hover .arrow{transform:translateX(3px);}
.btn-primary{background:var(--brand);color:#fff;border-color:var(--brand);}
.btn-primary:hover{background:var(--brand-hover);border-color:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-ghost{border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-light{background:#EDEAE4;color:var(--ink);border-color:#EDEAE4;}
.btn-light:hover{background:#fff;border-color:#fff;transform:translateY(-1px);}
.btn-outline-light{border-color:rgba(237,234,228,.5);color:var(--dark-text);}
.btn-outline-light:hover{border-color:var(--brand);color:#fff;background:var(--brand);transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:8px;}
.btn-block{width:100%;}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;
  font-size:15px;transition:color 180ms var(--ease);
}
.btn-text .arrow{transition:transform 180ms var(--ease);}
.btn-text:hover{color:var(--brand-hover);}
.btn-text:hover .arrow{transform:translateX(3px);}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none!important;box-shadow:none;}

/* ---------- 标签 / 徽章 ---------- */
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;
  border-radius:var(--r-tag);background:var(--brand-soft);color:var(--brand);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.tag-aux{background:transparent;border:1px solid var(--aux);color:var(--aux);}
.tag-ok{background:rgba(47,111,107,.10);color:var(--aux);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(247,244,239,.86);
  backdrop-filter:saturate(150%) blur(10px);border-bottom:1px solid transparent;
  transition:border-color 200ms var(--ease),background-color 200ms var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(247,244,239,.94);}
.nav-wrap{
  max-width:var(--container-wide);margin:0 auto;padding:0 28px;
  height:var(--nav-h);display:flex;align-items:center;gap:28px;
}
.brand{
  font-family:"Noto Serif SC","Songti SC",serif;font-weight:700;font-size:19px;
  letter-spacing:-.01em;white-space:nowrap;color:var(--ink);
}
.brand span{color:var(--brand);}
.nav-main{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-link{
  position:relative;height:var(--nav-h);display:inline-flex;align-items:center;
  padding:0 12px;font-size:15px;color:var(--ink-2);
  transition:color 140ms var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:12px;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform 180ms var(--ease);
}
.nav-link:hover{color:var(--brand);}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-side{margin-left:auto;display:flex;align-items:center;gap:14px;}
.nav-search{
  display:flex;align-items:center;gap:8px;height:40px;padding:0 14px;
  border:1px solid var(--line);border-radius:999px;background:#fff;
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 2px var(--brand-soft);}
.nav-search svg{flex:0 0 auto;color:var(--muted);}
.nav-search input{
  border:0;background:transparent;outline:none;width:150px;font-size:14px;
}
.nav-search input::placeholder{color:var(--muted);}
.hamburger{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;cursor:pointer;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink);position:relative;}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);
}
.hamburger span::before{top:-6px;}
.hamburger span::after{top:6px;}

/* 抽屉 */
.drawer{
  position:fixed;inset:0;z-index:80;background:var(--paper);
  transform:translateY(-100%);transition:transform 260ms var(--ease);
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
}
.drawer.is-open{transform:translateY(0);}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-close{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:#fff;cursor:pointer;font-size:20px;line-height:1;
}
.drawer nav{display:flex;flex-direction:column;}
.drawer nav a{
  font-size:18px;padding:16px 4px;border-bottom:1px solid var(--line);color:var(--ink);
}
.drawer nav a.is-active{color:var(--brand);font-weight:600;}
.drawer-foot{margin-top:28px;display:flex;flex-direction:column;gap:14px;}
.drawer-foot input{
  height:46px;border:1px solid var(--line);border-radius:10px;padding:0 14px;background:#fff;
}
.drawer-foot input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px var(--brand-soft);}

/* ---------- Hero ---------- */
.hero{padding-top:calc(var(--nav-h) + 28px);padding-bottom:88px;position:relative;overflow:hidden;}
.hero-grid{
  max-width:var(--container-wide);margin:0 auto;padding:0 28px;
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:56px;align-items:center;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);
  letter-spacing:.06em;text-transform:uppercase;margin-bottom:20px;
}
.hero-eyebrow i{width:22px;height:1px;background:var(--brand);display:inline-block;}
.hero h1{
  font-size:50px;line-height:1.16;letter-spacing:-.022em;margin-bottom:22px;
}
.hero h1 em{font-style:normal;color:var(--brand);}
.hero-sub{font-size:18px;line-height:1.8;color:var(--ink-2);max-width:34em;margin-bottom:32px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.trust-bar{
  display:flex;flex-wrap:wrap;gap:10px 22px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.trust-bar b{color:var(--ink-2);font-weight:600;}
.hero-visual{position:relative;}
.hero-panel{
  position:relative;border-radius:var(--r-panel);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh-2);aspect-ratio:4/3;
  background:var(--ink);
}
.hero-panel img{width:100%;height:100%;object-fit:cover;opacity:.92;}
.hero-panel::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(20,24,27,.20) 0%,rgba(20,24,27,.62) 100%);
}
.hero-panel-caption{
  position:absolute;left:24px;right:24px;bottom:22px;z-index:2;color:var(--dark-text);
}
.hero-panel-caption strong{display:block;font-family:"Noto Serif SC",serif;font-size:20px;margin-bottom:6px;}
.hero-panel-caption span{font-size:13px;color:rgba(237,234,228,.78);}
.float-card{
  position:absolute;right:-18px;bottom:-26px;width:250px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-card);padding:18px;box-shadow:var(--sh-2);
}
.float-card h3{font-size:15px;margin-bottom:12px;}
.float-row{display:flex;justify-content:space-between;gap:12px;font-size:13px;color:var(--muted);padding:7px 0;border-bottom:1px dashed var(--line);}
.float-row:last-child{border-bottom:0;}
.float-row b{color:var(--ink-2);font-weight:600;}
.float-verify{margin-top:12px;display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--aux);}

/* ---------- 编号条目行 ---------- */
.entry-list{border-top:1px solid var(--line);}
.entry-row{
  display:grid;grid-template-columns:76px minmax(0,1fr) 40px;gap:24px;align-items:center;
  padding:26px 12px;border-bottom:1px solid var(--line);
  transition:background-color 180ms var(--ease);
}
.entry-row:hover{background:var(--paper-2);}
.entry-num{
  font-family:"Noto Serif SC",serif;font-size:26px;color:var(--brand);
  letter-spacing:.02em;
}
.entry-row h3{font-size:21px;margin-bottom:6px;}
.entry-row p{margin:0;color:var(--ink-2);font-size:15px;line-height:1.75;}
.entry-arrow{color:var(--muted);transition:transform 200ms var(--ease),color 200ms var(--ease);}
.entry-row:hover .entry-arrow{transform:translateX(4px);color:var(--brand);}

/* ---------- 轮播 ---------- */
.carousel-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.carousel-nav{display:flex;gap:10px;}
.carousel-btn{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;
  cursor:pointer;display:inline-flex;align-items:center;justify-content:center;
  transition:border-color 180ms var(--ease),color 180ms var(--ease),background-color 180ms var(--ease);
}
.carousel-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}
.track{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  scroll-behavior:smooth;padding:4px 4px 22px;
  scrollbar-width:none;
}
.track::-webkit-scrollbar{display:none;}
.shot-card{
  flex:0 0 calc((100% - 48px)/2.5);scroll-snap-align:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:transform 200ms var(--ease),box-shadow 200ms var(--ease),border-color 200ms var(--ease);
}
.shot-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-soft);}
.shot-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--paper-2);}
.shot-media img{width:100%;height:100%;object-fit:cover;}
.shot-badge{
  position:absolute;left:12px;top:12px;height:26px;padding:0 10px;display:inline-flex;align-items:center;
  border-radius:var(--r-tag);background:rgba(20,24,27,.78);color:#EDEAE4;font-size:12.5px;font-weight:600;
}
.shot-body{padding:20px 22px 24px;}
.shot-body h3{font-size:19px;margin-bottom:8px;}
.shot-body p{margin:0;font-size:14.5px;color:var(--ink-2);line-height:1.75;}
.dots{display:flex;gap:8px;justify-content:center;margin-top:6px;}
.dot{
  width:8px;height:8px;border-radius:50%;background:var(--line);border:0;padding:0;cursor:pointer;
  transition:background-color 180ms var(--ease),width 180ms var(--ease);
}
.dot.is-active{background:var(--brand);width:22px;border-radius:4px;}

/* ---------- 系统要求 definition ---------- */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.spec-group{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:26px 26px 10px;
}
.spec-group h3{font-size:18px;margin-bottom:16px;display:flex;align-items:center;gap:10px;}
.spec-group h3 .tag-aux{height:24px;}
.spec-item{
  display:grid;grid-template-columns:132px minmax(0,1fr);gap:20px;align-items:baseline;
  padding:16px 0;border-top:1px solid var(--line);
}
.spec-item dt{
  position:relative;padding-left:12px;font-size:14px;color:var(--ink-2);font-weight:600;
}
.spec-item dt::before{
  content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;background:var(--aux);border-radius:2px;
}
.spec-item dd{margin:0;font-size:14.5px;color:var(--ink-2);line-height:1.75;}
.spec-item dd b{color:var(--ink);font-weight:600;}

/* ---------- 评价墙 ---------- */
.review-layout{display:grid;grid-template-columns:1.15fr 1fr;gap:24px;align-items:start;}
.review-feature{
  background:var(--ink);color:var(--dark-text);border-radius:var(--r-card);padding:32px;
  border:1px solid var(--ink);position:relative;overflow:hidden;
}
.review-feature::after{
  content:"“";position:absolute;right:20px;top:-10px;font-family:"Noto Serif SC",serif;
  font-size:140px;line-height:1;color:rgba(237,234,228,.07);
}
.review-feature .quote{font-size:17px;line-height:1.9;margin:18px 0 24px;color:rgba(237,234,228,.92);}
.review-feature .meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--dark-sub);}
.stars{color:var(--brand);letter-spacing:2px;font-size:13px;}
.review-cols{columns:2;column-gap:24px;}
.review-card{
  break-inside:avoid;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;margin-bottom:24px;transition:transform 200ms var(--ease),box-shadow 200ms var(--ease);
}
.review-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.review-card p{margin:12px 0 16px;font-size:14.5px;color:var(--ink-2);line-height:1.8;}
.review-card .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted);}

/* ---------- 下载深色区 ---------- */
.download{background:var(--dark);color:var(--dark-text);}
.download-inner{
  display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:56px;align-items:center;
}
.download h2{color:#fff;font-size:34px;line-height:1.3;margin-bottom:18px;}
.download p{color:var(--dark-sub);font-size:16px;line-height:1.85;max-width:32em;}
.download-actions{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:26px;}
.qr-panel{
  display:flex;flex-direction:column;align-items:center;gap:12px;justify-self:end;
  padding:22px;border:1px solid rgba(237,234,228,.18);border-radius:var(--r-card);
  background:rgba(255,255,255,.03);
}
.qr-box{
  width:120px;height:120px;border-radius:10px;background:#EDEAE4;
  display:grid;grid-template-columns:repeat(6,1fr);grid-template-rows:repeat(6,1fr);
  padding:10px;gap:3px;
}
.qr-box i{background:var(--ink);border-radius:2px;}
.qr-box i:nth-child(3n){background:transparent;}
.qr-panel span{font-size:12.5px;color:var(--dark-sub);text-align:center;}
.download-foot{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(237,234,228,.16);
  display:flex;flex-wrap:wrap;gap:8px 26px;font-size:13px;color:var(--dark-sub);
}
.download-foot b{color:#EDEAE4;font-weight:600;}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.news-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  transition:transform 200ms var(--ease),box-shadow 200ms var(--ease),border-color 200ms var(--ease);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-soft);}
.news-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--paper-2);}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 300ms var(--ease);}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.news-body h3{
  font-size:18px;line-height:1.5;margin:12px 0 10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body p{
  font-size:14.5px;color:var(--ink-2);line-height:1.75;margin:0 0 18px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--muted);padding-top:14px;border-top:1px solid var(--line);
}
.empty-state{
  border:1px solid var(--line);border-radius:var(--r-card);background:#fff;
  padding:56px 32px;text-align:center;grid-column:1/-1;
}
.empty-state .lines{display:flex;flex-direction:column;gap:8px;align-items:center;margin-bottom:22px;}
.empty-state .lines i{display:block;height:6px;border-radius:3px;background:var(--paper-2);}
.empty-state .lines i:nth-child(1){width:120px;}
.empty-state .lines i:nth-child(2){width:86px;background:var(--brand-soft);}
.empty-state .lines i:nth-child(3){width:64px;}
.empty-state h3{font-size:19px;margin-bottom:8px;}
.empty-state p{color:var(--muted);font-size:14.5px;margin-bottom:20px;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);max-width:880px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:22px 44px 22px 0;position:relative;
  font-family:"Noto Serif SC","Songti SC",serif;font-size:18px;font-weight:700;
  transition:color 180ms var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";position:absolute;right:10px;top:30px;width:10px;height:10px;
  border-right:1.5px solid var(--ink-2);border-bottom:1.5px solid var(--ink-2);
  transform:rotate(45deg);transition:transform 220ms var(--ease),border-color 180ms var(--ease);
}
.faq-item summary:hover{color:var(--brand);}
.faq-item summary:hover::after{border-color:var(--brand);}
.faq-item[open] summary::after{transform:rotate(-135deg);}
.faq-item .faq-body{padding:0 44px 24px 0;color:var(--ink-2);font-size:15.5px;line-height:1.85;}
.faq-item .faq-body p:last-child{margin-bottom:0;}

/* ---------- 分类入口 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}
.cat-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform 200ms var(--ease),box-shadow 200ms var(--ease),border-color 200ms var(--ease);
}
.cat-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-soft);}
.cat-card .cat-media{aspect-ratio:3/2;overflow:hidden;background:var(--paper-2);}
.cat-card .cat-media img{width:100%;height:100%;object-fit:cover;}
.cat-card .cat-body{padding:20px 22px 24px;}
.cat-card h3{font-size:18px;margin-bottom:8px;}
.cat-card p{margin:0 0 14px;font-size:14.5px;color:var(--ink-2);line-height:1.75;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:var(--dark-sub);padding:72px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{
  font-family:"Noto Serif SC","Songti SC",serif;font-size:20px;color:#EDEAE4;font-weight:700;margin-bottom:14px;
}
.footer-brand span{color:var(--brand);}
.site-footer p{font-size:14px;line-height:1.85;color:var(--dark-sub);}
.footer-col h4{
  font-family:"PingFang SC","Microsoft YaHei",sans-serif;font-size:14px;color:#EDEAE4;
  margin-bottom:16px;letter-spacing:.04em;
}
.footer-col a{
  display:block;font-size:14px;padding:6px 0;color:var(--dark-sub);
  transition:color 160ms var(--ease);
}
.footer-col a:hover{color:#EDEAE4;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(237,234,228,.14);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:var(--dark-sub);
}
.footer-bottom .num{color:#C9C6C0;}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 360ms var(--ease),transform 360ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1439px){
  .container-wide{max-width:1200px;}
}
@media (max-width:1199px){
  .nav-search{display:none;}
  .hero h1{font-size:44px;}
  .hero-grid{gap:40px;}
  .cat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .review-layout{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:991px){
  .nav-main{display:none;}
  .hamburger{display:inline-flex;}
  .nav-side .btn{display:none;}
  body{font-size:16px;}
  .section{padding:64px 0;}
  .hero{padding-bottom:64px;}
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .hero h1{font-size:36px;}
  .hero-sub{font-size:16.5px;}
  .float-card{position:static;width:100%;margin-top:20px;right:auto;bottom:auto;}
  .spec-grid{grid-template-columns:1fr;}
  .download-inner{grid-template-columns:1fr;gap:36px;}
  .qr-panel{justify-self:start;}
  .shot-card{flex:0 0 calc((100% - 24px)/1.6);}
  .sec-head h2,.download h2{font-size:27px;}
  .entry-row{grid-template-columns:56px minmax(0,1fr) 28px;gap:16px;padding:22px 6px;}
  .entry-num{font-size:22px;}
}
@media (max-width:767px){
  .container,.container-wide{padding:0 20px;}
  .nav-wrap{padding:0 20px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .hero h1{font-size:30px;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .news-grid{grid-template-columns:1fr;}
  .cat-grid{grid-template-columns:1fr;}
  .shot-card{flex:0 0 88%;}
  .review-cols{columns:1;}
  .download-actions{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .sec-head-row{flex-direction:column;align-items:flex-start;gap:14px;}
  .entry-row{grid-template-columns:44px minmax(0,1fr);}
  .entry-arrow{display:none;}
  .faq-item summary{font-size:16.5px;}
}
@media (max-width:480px){
  .container,.container-wide{padding:0 16px;}
  .nav-wrap{padding:0 16px;}
  .hero h1{font-size:27px;}
  .sec-head h2,.download h2{font-size:23px;}
  .entry-num{font-size:19px;}
  .story-deco{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --ink:#14181B;
  --ink-2:#2A2F33;
  --paper:#F7F4EF;
  --paper-2:#EFEAE2;
  --line:#DED7CB;
  --brand:#B23A2E;
  --brand-hover:#8F2B22;
  --brand-soft:rgba(178,58,46,.10);
  --aux:#2F6F6B;
  --aux-soft:rgba(47,111,107,.10);
  --muted:#6B6F73;
  --ok:#2F6F6B;
  --warn:#B7791F;
  --err:#C0392B;
  --dark:#14181B;
  --dark-2:#1D2226;
  --dark-text:#EDEAE4;
  --dark-sub:#9A9E9F;
  --sh-1:0 1px 2px rgba(20,24,27,.06);
  --sh-2:0 10px 28px rgba(20,24,27,.10);
  --r-tag:6px;
  --r-btn:10px;
  --r-card:16px;
  --r-panel:20px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:60px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding-top:var(--nav-h);
  background:var(--paper);
  color:var(--ink-2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{
  margin:0;
  font-family:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  color:var(--ink);
  font-weight:700;
  letter-spacing:-.02em;
}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease)}
a:hover{color:var(--brand-hover)}
button{font:inherit;cursor:pointer}
input{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.container-wide{max-width:1320px}
::selection{background:var(--brand-soft);color:var(--ink)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  height:var(--nav-h);
  background:rgba(247,244,239,.92);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),background-color .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:var(--sh-1);
  background:rgba(247,244,239,.96);
  backdrop-filter:saturate(140%) blur(8px);
}
.header-inner{
  max-width:1320px;
  margin:0 auto;
  height:100%;
  padding:0 24px;
  display:flex;
  align-items:center;
  gap:28px;
}
.logo{
  font-family:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  font-size:19px;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ink);
  white-space:nowrap;
  flex:none;
}
.logo span{color:var(--brand)}
.logo:hover{color:var(--ink)}
.nav-main{display:flex;align-items:center;gap:22px;flex:1;min-width:0}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  color:var(--ink-2);
  white-space:nowrap;
  transition:color .14s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.header-actions{display:flex;align-items:center;gap:14px;flex:none}
.nav-search{
  display:flex;
  align-items:center;
  gap:8px;
  padding:0 12px;
  height:36px;
  min-width:180px;
  border:1px solid var(--line);
  border-radius:999px;
  background:#fff;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 2px var(--brand-soft)}
.nav-search svg{flex:none;opacity:.55}
.nav-search input{
  border:0;outline:0;background:transparent;
  width:100%;font-size:14px;color:var(--ink-2);
}
.nav-search input::placeholder{color:var(--muted)}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  background:#fff;
  padding:0;
  align-items:center;
  justify-content:center;
}
.nav-toggle span{
  display:block;width:17px;height:1.6px;background:var(--ink);position:relative;
}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:17px;height:1.6px;background:var(--ink);
  transition:transform .2s var(--ease),top .2s var(--ease);
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}

/* 移动抽屉 */
.nav-drawer{
  position:fixed;
  inset:var(--nav-h) 0 0 0;
  z-index:55;
  background:var(--paper);
  padding:26px 24px 40px;
  overflow-y:auto;
  transform:translateY(-8px);
  opacity:0;
  visibility:hidden;
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
}
.nav-drawer.is-open{opacity:1;transform:none;visibility:visible}
.nav-drawer .drawer-link{
  display:block;
  font-size:18px;
  font-family:"Noto Serif SC","Songti SC",serif;
  color:var(--ink);
  padding:15px 2px;
  border-bottom:1px solid var(--line);
}
.nav-drawer .drawer-link:hover,.nav-drawer .drawer-link.is-active{color:var(--brand)}
.drawer-foot{margin-top:28px;display:grid;gap:14px}
body.drawer-open{overflow:hidden}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:var(--r-btn);
  border:1.5px solid transparent;
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-outline{border-color:var(--line);color:var(--ink-2);background:#fff}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost-light{border-color:rgba(237,234,228,.45);color:var(--dark-text);background:transparent}
.btn-ghost-light:hover{border-color:#fff;color:#fff;transform:translateY(-1px)}
.btn-block{width:100%}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
}
.link-arrow .arrow{transition:transform .2s var(--ease)}
.link-arrow:hover .arrow{transform:translateX(3px)}

/* ---------- 标签 / 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;
  height:26px;padding:0 10px;
  border-radius:var(--r-tag);
  background:var(--brand-soft);
  color:var(--brand);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.02em;
}
.badge-aux{
  background:transparent;
  border:1px solid var(--aux);
  color:var(--aux);
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}

/* ---------- 文章头部 ---------- */
.article-hero{
  background:linear-gradient(180deg,var(--paper-2) 0%,var(--paper) 100%);
  border-bottom:1px solid var(--line);
  padding:38px 0 42px;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C6BFB2}
.breadcrumb .crumb-current{color:var(--ink-2)}
.article-head{max-width:900px}
.article-head h1{
  font-size:38px;
  line-height:1.28;
  margin:16px 0 18px;
  letter-spacing:-.02em;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  font-size:13px;color:var(--muted);
  padding-top:16px;
  border-top:1px solid var(--line);
}
.meta-row .dot{width:3px;height:3px;border-radius:50%;background:#C6BFB2}

/* ---------- 正文布局 ---------- */
.entry-section{padding:64px 0 8px}
.entry-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 264px;
  gap:56px;
  align-items:start;
}
.entry-main{max-width:760px}

.entry-body{font-size:17px;line-height:1.9;color:var(--ink-2)}
.entry-body > *:first-child{margin-top:0}
.entry-body h2{
  position:relative;
  font-size:29px;
  line-height:1.34;
  margin:2.1em 0 .8em;
  padding-left:16px;
}
.entry-body h2::before{
  content:"";position:absolute;left:0;top:.35em;
  width:3px;height:28px;background:var(--brand);border-radius:2px;
}
.entry-body h3{font-size:21px;line-height:1.45;margin:1.7em 0 .6em}
.entry-body h4{font-size:18px;margin:1.5em 0 .5em}
.entry-body p{margin:0 0 1.2em}
.entry-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.entry-body a:hover{color:var(--brand-hover)}
.entry-body strong{color:var(--ink)}
.entry-body ul,.entry-body ol{margin:0 0 1.4em;padding-left:4px}
.entry-body ul li{position:relative;padding-left:20px;margin-bottom:.6em}
.entry-body ul li::before{
  content:"";position:absolute;left:2px;top:.78em;
  width:6px;height:6px;border-radius:50%;background:var(--brand);opacity:.75;
}
.entry-body ol{counter-reset:li;padding-left:0}
.entry-body ol li{position:relative;padding-left:34px;margin-bottom:.6em;counter-increment:li}
.entry-body ol li::before{
  content:counter(li,decimal-leading-zero);
  position:absolute;left:0;top:0;
  font-size:13px;font-weight:700;color:var(--brand);
  font-variant-numeric:tabular-nums;
}
.entry-body blockquote{
  margin:1.6em 0;
  padding:20px 22px;
  background:var(--paper-2);
  border-left:3px solid var(--brand);
  border-radius:0 var(--r-card) var(--r-card) 0;
  color:var(--ink);
}
.entry-body blockquote p:last-child{margin-bottom:0}
.entry-body img{
  border-radius:var(--r-card);
  border:1px solid var(--line);
  margin:1.6em 0 .7em;
}
.entry-body figure{margin:1.6em 0}
.entry-body figcaption{font-size:13px;color:var(--muted);text-align:center}
.entry-body table{
  width:100%;
  border-collapse:collapse;
  margin:1.6em 0;
  font-size:15px;
}
.entry-body th,.entry-body td{
  border-bottom:1px solid var(--line);
  padding:12px 10px;
  text-align:left;
}
.entry-body th{color:var(--ink);font-weight:600;border-bottom-color:#CFC7B8}
.entry-body code{
  background:var(--paper-2);padding:2px 6px;border-radius:4px;
  font-size:14px;color:var(--ink);
}
.entry-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}

/* 空态 */
.empty-state{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:#fff;
  box-shadow:var(--sh-1);
  padding:48px 32px;
  text-align:center;
}
.empty-state .empty-mark{
  width:64px;height:64px;margin:0 auto 18px;
  border:2px dashed #CFC7B8;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:var(--muted);font-size:24px;
}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--muted);margin-bottom:22px}

/* 目录 */
.toc{
  position:sticky;
  top:calc(var(--nav-h) + 28px);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:#fff;
  box-shadow:var(--sh-1);
  padding:20px;
}
.toc-title{
  font-size:13px;font-weight:700;color:var(--ink);
  letter-spacing:.08em;text-transform:uppercase;
  padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:12px;
}
.toc-list{display:grid;gap:2px}
.toc-list a{
  display:block;
  padding:7px 10px;
  font-size:14px;
  line-height:1.55;
  color:var(--ink-2);
  border-left:2px solid transparent;
  border-radius:0 6px 6px 0;
  transition:color .16s var(--ease),background-color .16s var(--ease),border-color .16s var(--ease);
}
.toc-list a:hover{background:var(--paper-2);color:var(--brand)}
.toc-list a.is-current{border-left-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.toc-foot{margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}

/* ---------- 板块通用 ---------- */
.section{padding:76px 0}
.section-alt{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:32px;
}
.section-head h2{
  position:relative;
  font-size:30px;line-height:1.3;padding-left:16px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.36em;
  width:3px;height:28px;background:var(--brand);border-radius:2px;
}
.section-head p{font-size:14px;color:var(--muted);margin:8px 0 0 16px}

/* 相关卡片 */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  display:flex;flex-direction:column;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-soft)}
.card-cover{position:relative;aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line)}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.card:hover .card-cover img{transform:scale(1.03)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:19px;line-height:1.5}
.card-body p{font-size:14.5px;color:var(--muted);line-height:1.75;margin:0}
.card-foot{margin-top:auto;padding-top:12px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted)}

/* 标签行 */
.tag-block{
  margin-top:48px;padding-top:26px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
}
.tag-block .tag-label{font-size:13px;color:var(--muted);margin-right:4px}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--r-tag);
  background:#fff;font-size:13px;color:var(--ink-2);
  transition:border-color .16s var(--ease),color .16s var(--ease),background-color .16s var(--ease);
}
.tag:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}

/* 继续浏览 */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:44px}
.pager-item{
  display:block;padding:20px 22px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.pager-item:hover{transform:translateY(-2px);border-color:var(--brand-soft);box-shadow:var(--sh-2)}
.pager-item .pager-dir{font-size:13px;color:var(--muted);display:block;margin-bottom:8px}
.pager-item strong{display:block;font-size:16px;color:var(--ink);font-family:"Noto Serif SC","Songti SC",serif;line-height:1.55}
.pager-item:hover strong{color:var(--brand)}

/* FAQ */
.faq-list{display:grid;gap:12px;max-width:840px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item[open]{border-color:var(--brand-soft);box-shadow:var(--sh-1)}
.faq-item summary{
  list-style:none;cursor:pointer;
  padding:18px 22px;
  font-size:16px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .faq-mark{
  flex:none;width:20px;height:20px;position:relative;
}
.faq-item summary .faq-mark::before,
.faq-item summary .faq-mark::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-item summary .faq-mark::before{width:12px;height:1.6px}
.faq-item summary .faq-mark::after{width:1.6px;height:12px;transition:transform .2s var(--ease)}
.faq-item[open] summary .faq-mark::after{transform:translate(-50%,-50%) scaleY(0)}
.faq-body{padding:0 22px 20px;font-size:15.5px;color:var(--muted);line-height:1.85}
.faq-body p{margin:0}

/* CTA 深色条 */
.cta-band{
  background:var(--dark);
  color:var(--dark-text);
  padding:64px 0;
}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:40px;
}
.cta-inner h2{color:#fff;font-size:30px;line-height:1.35;margin-bottom:12px}
.cta-inner p{color:var(--dark-sub);font-size:15px;margin:0;max-width:560px}
.cta-actions{display:flex;gap:14px;flex:none}

/* 页脚 */
.site-footer{background:var(--dark);color:var(--dark-sub);padding:64px 0 28px;border-top:1px solid rgba(237,234,228,.08)}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(237,234,228,.12);
}
.footer-brand{
  font-family:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  font-size:20px;font-weight:700;color:#fff;margin-bottom:14px;letter-spacing:-.01em;
}
.footer-brand span{color:#D8594A}
.footer-grid p{font-size:14px;line-height:1.85;margin:0}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.02em}
.footer-col a{
  display:block;font-size:14px;color:var(--dark-sub);
  padding:6px 0;transition:color .16s var(--ease),transform .16s var(--ease);
}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-top:24px;font-size:13px;color:#7F8385;
}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .36s var(--ease),transform .36s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* 焦点可访问性 */
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:4px;
}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .entry-layout{grid-template-columns:minmax(0,1fr)}
  .toc{display:none}
  .entry-main{max-width:760px}
}
@media (max-width:992px){
  body{font-size:16px}
  .nav-main,.nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .article-head h1{font-size:32px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:768px){
  :root{--nav-h:54px}
  .container{padding:0 20px}
  .header-inner{padding:0 20px;gap:16px}
  .logo{font-size:17px}
  .section{padding:56px 0}
  .entry-section{padding:48px 0 0}
  .article-hero{padding:28px 0 32px}
  .article-head h1{font-size:28px;line-height:1.32}
  .entry-body{font-size:16px;line-height:1.85}
  .entry-body h2{font-size:24px}
  .entry-body h3{font-size:19px}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px}
  .section-head h2{font-size:24px}
  .pager{grid-template-columns:1fr}
  .cta-inner h2{font-size:24px}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .header-inner{padding:0 16px}
  .card-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .article-head h1{font-size:25px}
  .badge{height:24px;font-size:12px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --ink:#14181B;
  --ink-2:#2A2F33;
  --paper:#F7F4EF;
  --paper-2:#EFEAE2;
  --line:#DED7CB;
  --brand:#B23A2E;
  --brand-hover:#8F2B22;
  --brand-soft:rgba(178,58,46,.10);
  --aux:#2F6F6B;
  --aux-soft:rgba(47,111,107,.10);
  --muted:#6B6F73;
  --ok:#2F6F6B;
  --warn:#B7791F;
  --danger:#C0392B;
  --dark-text:#EDEAE4;
  --dark-sub:#9A9E9F;
  --sh-1:0 1px 2px rgba(20,24,27,.06);
  --sh-2:0 10px 28px rgba(20,24,27,.10);
  --r-tag:6px;
  --r-btn:10px;
  --r-card:16px;
  --r-panel:20px;
  --serif:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-card);}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand-hover);}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;color:var(--ink);margin:0;}
h1{font-size:52px;line-height:1.18;letter-spacing:-.02em;}
h2{font-size:32px;line-height:1.3;letter-spacing:-.01em;}
h3{font-size:21px;line-height:1.45;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
.num{font-variant-numeric:tabular-nums;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.container-wide{width:100%;max-width:1320px;margin:0 auto;padding:0 24px;}
.section{padding:104px 0;}
.section-alt{background:var(--paper-2);}
.section-head{max-width:720px;margin-bottom:48px;}
.section-head h2{position:relative;padding-left:18px;}
.section-head h2::before{content:"";position:absolute;left:0;top:.28em;width:3px;height:28px;background:var(--brand);border-radius:2px;}
.section-head p{margin-top:16px;color:var(--ink-2);max-width:38em;}
.eyebrow{
  display:inline-block;
  font-size:13px;
  letter-spacing:.16em;
  color:var(--brand);
  background:var(--brand-soft);
  border-radius:var(--r-tag);
  padding:5px 12px;
  margin-bottom:20px;
  font-family:var(--mono);
}
.rule{border:0;border-top:1px solid var(--line);margin:0;}
/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,244,239,.9);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);}
.nav-wrap{
  max-width:1320px;margin:0 auto;padding:0 24px;
  height:60px;display:flex;align-items:center;gap:32px;
}
.brand{
  font-family:var(--serif);font-weight:700;font-size:19px;color:var(--ink);
  letter-spacing:-.01em;white-space:nowrap;
}
.brand span{color:var(--brand);}
.brand:hover{color:var(--ink);}
.nav-main{display:flex;align-items:center;gap:26px;flex:1;min-width:0;}
.nav-link{
  position:relative;color:var(--ink-2);font-size:15px;padding:6px 0;
  white-space:nowrap;transition:color .14s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--brand);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--brand);}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-side{display:flex;align-items:center;gap:14px;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  border-bottom:1px solid var(--line);padding:4px 2px;transition:border-color .16s var(--ease);
}
.nav-search:focus-within{border-bottom-color:var(--brand);}
.nav-search input{
  border:0;background:transparent;width:132px;font-size:14px;outline:none;color:var(--ink);
}
.nav-search input::placeholder{color:var(--muted);}
.nav-search svg{width:15px;height:15px;stroke:var(--muted);fill:none;stroke-width:1.6;}
.nav-toggle{
  display:none;width:40px;height:36px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;position:relative;
}
.nav-toggle i,.nav-toggle i::before,.nav-toggle i::after{
  position:absolute;left:11px;width:18px;height:1.5px;background:var(--ink);border-radius:2px;
  transition:transform .18s var(--ease),opacity .18s var(--ease);
}
.nav-toggle i{top:17px;}
.nav-toggle i::before{content:"";left:0;top:-6px;}
.nav-toggle i::after{content:"";left:0;top:6px;}
.nav-drawer{
  display:none;background:var(--paper);border-top:1px solid var(--line);
  padding:20px 24px 26px;
}
.nav-drawer a{
  display:block;font-size:18px;color:var(--ink);padding:12px 0;border-bottom:1px solid var(--line);
}
.nav-drawer a.is-active{color:var(--brand);}
.nav-drawer .drawer-search{display:flex;gap:10px;margin-top:18px;}
.nav-drawer .drawer-search input{
  flex:1;height:44px;padding:0 12px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;outline:none;
}
.nav-drawer .drawer-search input:focus{border-color:var(--brand);box-shadow:0 0 0 2px var(--brand-soft);}
.nav-drawer.is-open{display:block;}
/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-primary{background:var(--brand);color:#fff;border:1px solid var(--brand);}
.btn-primary:hover{background:var(--brand-hover);border-color:var(--brand-hover);color:#fff;transform:translateY(-1px);}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.42);}
.btn-light:hover{border-color:#fff;color:#fff;transform:translateY(-1px);}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-size:15px;font-weight:600;
}
.btn-text svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.8;transition:transform .2s var(--ease);}
.btn-text:hover svg{transform:translateX(3px);}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;}
/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;line-height:1;padding:5px 10px;border-radius:var(--r-tag);
  background:var(--brand-soft);color:var(--brand);
}
.badge-aux{background:transparent;border:1px solid var(--aux);color:var(--aux);}
.badge-ink{background:rgba(20,24,27,.06);color:var(--ink-2);}
/* ---------- hero ---------- */
.hero{padding:92px 0 104px;border-bottom:1px solid var(--line);}
.hero-grid{display:grid;grid-template-columns:1.04fr .96fr;gap:64px;align-items:center;}
.hero h1{max-width:14em;}
.hero-sub{margin-top:22px;font-size:18px;color:var(--ink-2);max-width:26em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.hero-trust{
  display:flex;flex-wrap:wrap;gap:10px 26px;align-items:center;
  margin-top:34px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.hero-trust span{display:inline-flex;align-items:center;gap:8px;}
.hero-trust b{color:var(--ink-2);font-weight:600;}
.dot{width:6px;height:6px;border-radius:50%;background:var(--brand);display:inline-block;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-panel);
  border:1px solid var(--line);box-shadow:var(--sh-2);
}
.hero-media::after{
  content:"";position:absolute;inset:0;border-radius:var(--r-panel);
  background:linear-gradient(180deg,rgba(20,24,27,.12) 0%,rgba(20,24,27,.58) 100%);
  pointer-events:none;
}
.hero-card{
  position:absolute;left:-32px;bottom:26px;width:300px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-2);z-index:2;
}
.hero-card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.hero-card-head .mono{font-size:16px;font-weight:700;}
.kv-list li{
  display:flex;justify-content:space-between;align-items:baseline;gap:12px;
  padding:8px 0;border-bottom:1px solid var(--line);font-size:13.5px;
}
.kv-list li:last-child{border-bottom:0;}
.kv-list span{color:var(--muted);}
.kv-list b{font-weight:600;color:var(--ink);}
.tiny{font-size:13px;color:var(--muted);line-height:1.7;margin-top:12px;}
/* ---------- numbered rows ---------- */
.entries{border-top:1px solid var(--line);}
.entry{
  display:grid;grid-template-columns:64px 260px 1fr 32px;gap:24px;align-items:start;
  padding:28px 0;border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.entry:hover{background:rgba(239,234,226,.6);}
.entry-num{
  font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:22px;color:var(--brand);
  line-height:1.4;
}
.entry h3{font-size:19px;}
.entry p{color:var(--ink-2);font-size:15.5px;margin:0;}
.entry-arrow{align-self:center;justify-self:end;color:var(--muted);transition:transform .2s var(--ease),color .2s var(--ease);}
.entry:hover .entry-arrow{transform:translateX(3px);color:var(--brand);}
.entry-arrow svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.6;}
/* ---------- steps + sticky ---------- */
.steps-layout{display:grid;grid-template-columns:2fr 1fr;gap:56px;align-items:start;}
.steps{border-top:1px solid var(--line);}
.step{
  display:grid;grid-template-columns:56px 1fr;gap:20px;
  padding:26px 0;border-bottom:1px solid var(--line);
}
.step-num{
  font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:15px;font-weight:700;
  color:var(--brand);border:1px solid var(--line);border-radius:var(--r-tag);
  height:30px;display:flex;align-items:center;justify-content:center;background:#fff;
}
.step h3{margin-bottom:8px;}
.step p{color:var(--ink-2);font-size:15.5px;}
.step-meta{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:14px;font-size:13px;color:var(--muted);
}
.step-meta .badge-aux{font-size:12px;}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);margin-bottom:20px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.side-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-soft);}
.side-card h3{font-size:17px;margin-bottom:14px;padding-left:12px;position:relative;}
.side-card h3::before{content:"";position:absolute;left:0;top:.32em;width:3px;height:18px;background:var(--brand);border-radius:2px;}
.side-card .btn{width:100%;margin-top:10px;}
.toc li a{
  display:flex;justify-content:space-between;gap:10px;
  padding:9px 0;border-bottom:1px dashed var(--line);
  font-size:14.5px;color:var(--ink-2);
}
.toc li:last-child a{border-bottom:0;}
.toc li a:hover{color:var(--brand);}
.toc li a span{color:var(--muted);font-family:var(--mono);font-size:13px;}
.is-sticky{position:sticky;top:88px;}
/* ---------- scenario cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-soft);}
.card img{aspect-ratio:3/2;object-fit:cover;border:1px solid var(--line);border-radius:12px;margin-bottom:18px;}
.card h3{margin-bottom:10px;}
.card p{font-size:15px;color:var(--ink-2);}
.card .card-foot{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);}
/* ---------- dark download ---------- */
.dark-block{
  background:var(--ink);color:var(--dark-text);border-radius:var(--r-panel);
  padding:56px;display:grid;grid-template-columns:1.4fr auto;gap:48px;align-items:center;
}
.dark-block h2{color:#fff;}
.dark-block p{color:var(--dark-sub);font-size:15.5px;margin-top:14px;max-width:36em;}
.dark-actions{display:flex;flex-direction:column;gap:12px;align-items:stretch;min-width:230px;}
.dark-foot{
  grid-column:1 / -1;border-top:1px solid rgba(255,255,255,.14);padding-top:18px;
  display:flex;flex-wrap:wrap;gap:8px 26px;font-size:13px;color:var(--dark-sub);
}
.qr{
  width:120px;height:120px;border-radius:12px;border:1px solid rgba(255,255,255,.2);
  display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.05);
  font-size:12px;color:var(--dark-sub);text-align:center;padding:8px;
}
/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line);}
.faq details{border-bottom:1px solid var(--line);}
.faq summary{
  list-style:none;cursor:pointer;padding:22px 40px 22px 0;position:relative;
  font-family:var(--serif);font-size:19px;font-weight:700;color:var(--ink);
  transition:color .18s var(--ease);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
  content:"";position:absolute;right:8px;top:32px;width:12px;height:12px;
  border-right:1.5px solid var(--brand);border-bottom:1.5px solid var(--brand);
  transform:rotate(45deg);transition:transform .2s var(--ease);
}
.faq details[open] summary::after{transform:rotate(-135deg);}
.faq summary:hover{color:var(--brand);}
.faq-body{padding:0 0 24px;color:var(--ink-2);font-size:15.5px;max-width:52em;}
/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--dark-text);padding:72px 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{font-family:var(--serif);font-size:20px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-brand span{color:var(--brand);}
.site-footer p{color:var(--dark-sub);font-size:14.5px;line-height:1.9;max-width:30em;}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.02em;}
.footer-col a{display:block;color:var(--dark-sub);font-size:14.5px;padding:6px 0;transition:color .16s var(--ease);}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:var(--dark-sub);
}
/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .36s var(--ease),transform .36s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
}
/* ---------- responsive ---------- */
@media (max-width:1439px){
  .container{max-width:1200px;}
}
@media (max-width:1199px){
  h1{font-size:44px;}
  .steps-layout{grid-template-columns:1fr;gap:32px;}
  .is-sticky{position:static;}
  .hero-grid{gap:44px;}
  .entry{grid-template-columns:56px 220px 1fr 28px;}
}
@media (max-width:991px){
  .nav-main{display:none;}
  .nav-toggle{display:block;}
  .nav-search{display:none;}
  .hero{padding:64px 0 72px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  h1{font-size:38px;}
  h2{font-size:27px;}
  .hero-media img{aspect-ratio:16/10;}
  .hero-card{left:16px;right:16px;bottom:16px;width:auto;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .dark-block{grid-template-columns:1fr;padding:40px;gap:28px;}
  .dark-actions{width:100%;}
  .qr{width:104px;height:104px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding:80px 0;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .section{padding:56px 0;}
  h1{font-size:31px;}
  h2{font-size:24px;}
  h3{font-size:18px;}
  .hero-sub{font-size:16.5px;}
  .hero-actions .btn{width:100%;}
  .entry{grid-template-columns:44px 1fr;gap:14px 16px;padding:22px 0;}
  .entry p{grid-column:2;}
  .entry-arrow{display:none;}
  .grid-3{grid-template-columns:1fr;}
  .step{grid-template-columns:44px 1fr;gap:14px;}
  .dark-block{padding:30px 24px;border-radius:16px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:480px){
  .container,.container-wide,.nav-wrap{padding:0 16px;}
  .hero-trust{font-size:12.5px;}
  .hero-card{padding:16px;}
  .side-card{padding:18px;}
}

/* roulang page: category2 */
:root{
  --ink:#14181B;
  --ink-2:#2A2F33;
  --paper:#F7F4EF;
  --paper-2:#EFEAE2;
  --line:#DED7CB;
  --brand:#B23A2E;
  --brand-hover:#8F2B22;
  --brand-soft:rgba(178,58,46,.10);
  --aux:#2F6F6B;
  --aux-soft:rgba(47,111,107,.10);
  --muted:#6B6F73;
  --warn:#B7791F;
  --danger:#C0392B;
  --dark:#14181B;
  --dark-text:#EDEAE4;
  --dark-muted:#9A9E9F;
  --sh-1:0 1px 2px rgba(20,24,27,.06);
  --sh-2:0 10px 28px rgba(20,24,27,.10);
  --r-tag:6px;
  --r-btn:10px;
  --r-card:16px;
  --r-hero:20px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --serif:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box;}

html{scroll-behavior:smooth;}

body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{display:block;max-width:100%;border-radius:0;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font:inherit;}
h1,h2,h3,h4,h5{font-family:var(--serif);font-weight:700;letter-spacing:-.01em;margin:0;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
.num,time,.ver-badge,.stat-num,.tl-date,.logo,.fc-ver{font-variant-numeric:tabular-nums;}

:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.container-wide{max-width:1320px;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,244,239,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(247,244,239,.97);}
.header-inner{display:flex;align-items:center;gap:30px;height:60px;}
.logo{
  font-family:var(--serif);font-size:19px;font-weight:700;letter-spacing:-.01em;
  white-space:nowrap;flex-shrink:0;
}
.logo span{color:var(--brand);}
.nav-main{display:flex;align-items:center;gap:24px;}
.nav-link{
  position:relative;font-size:14.5px;color:var(--ink-2);padding:6px 0;
  transition:color .14s var(--ease);white-space:nowrap;
}
.nav-link:hover{color:var(--brand);}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-right{margin-left:auto;display:flex;align-items:center;gap:14px;}
.search-mini{position:relative;display:flex;align-items:center;}
.search-mini input{
  width:186px;height:36px;padding:0 34px 0 14px;
  border:1px solid var(--line);border-radius:999px;background:#fff;
  font-size:13.5px;color:var(--ink);transition:border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.search-mini input::placeholder{color:#9AA0A3;}
.search-mini input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px var(--brand-soft);}
.search-mini button{
  position:absolute;right:6px;width:26px;height:26px;display:grid;place-items:center;
  color:var(--muted);border-radius:50%;transition:color .16s var(--ease);
}
.search-mini button:hover{color:var(--brand);}
.search-mini svg{width:15px;height:15px;}

.hamburger{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  align-items:center;justify-content:center;background:#fff;transition:border-color .16s var(--ease);
}
.hamburger:hover{border-color:var(--brand);}
.hamburger span{display:block;width:16px;height:1.5px;background:var(--ink);position:relative;}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink);
}
.hamburger span::before{top:-5px;}
.hamburger span::after{top:5px;}
.cta-icon-btn{
  display:none;width:40px;height:40px;border-radius:10px;background:var(--brand);color:#fff;
  align-items:center;justify-content:center;transition:background .16s var(--ease),transform .16s var(--ease);
}
.cta-icon-btn:hover{background:var(--brand-hover);transform:translateY(-1px);}
.cta-icon-btn svg{width:17px;height:17px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);padding:12px 22px;font-size:15px;font-weight:600;
  border:1.5px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn svg{width:16px;height:16px;transition:transform .18s var(--ease);}
.btn:hover svg{transform:translateX(3px);}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-invert{border-color:rgba(237,234,228,.4);color:var(--dark-text);background:transparent;}
.btn-invert:hover{border-color:var(--brand);color:#fff;background:rgba(178,58,46,.35);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section-alt{background:var(--paper-2);}
.section-head{margin-bottom:44px;max-width:720px;}
.sec-title{
  position:relative;padding-left:16px;font-size:32px;line-height:1.3;letter-spacing:-.02em;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:.24em;width:3px;height:28px;
  background:var(--brand);border-radius:2px;
}
.sec-desc{margin-top:14px;font-size:15.5px;color:var(--muted);line-height:1.8;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand);
  letter-spacing:.04em;font-weight:600;margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--brand);}

/* ---------- Hero ---------- */
.hero{padding-top:88px;padding-bottom:72px;position:relative;overflow:hidden;}
.hero-grid{
  display:grid;grid-template-columns:1.02fr 1fr;gap:56px;align-items:center;
}
.hero h1{
  font-size:50px;line-height:1.18;letter-spacing:-.02em;margin-bottom:22px;
}
.hero h1 em{font-style:normal;color:var(--brand);}
.hero-sub{font-size:17px;color:var(--ink-2);max-width:34em;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px;}
.trust-bar{
  display:flex;flex-wrap:wrap;gap:12px 22px;font-size:13px;color:var(--muted);
  padding-top:20px;border-top:1px solid var(--line);
}
.trust-bar span{display:inline-flex;align-items:center;gap:7px;}
.trust-bar i{width:5px;height:5px;border-radius:50%;background:var(--brand);display:inline-block;}
.trust-bar .num{color:var(--ink-2);font-family:var(--mono);font-size:12.5px;}

.hero-visual{
  position:relative;border-radius:var(--r-hero);overflow:hidden;min-height:462px;
  border:1px solid var(--line);background:#14181B;
}
.hv-bg{position:absolute;inset:0;background-size:cover;background-position:center;}
.hv-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(160deg,rgba(20,24,27,.62),rgba(20,24,27,.78));}
.hv-img{
  position:absolute;right:22px;top:22px;width:56%;aspect-ratio:4/3;object-fit:cover;
  border-radius:14px;border:1px solid rgba(247,244,239,.32);box-shadow:var(--sh-2);z-index:2;
}
.float-card{
  position:absolute;left:22px;bottom:22px;z-index:3;width:min(340px,72%);
  background:rgba(247,244,239,.97);border:1px solid var(--line);border-radius:14px;
  padding:16px 18px;box-shadow:var(--sh-2);
}
.fc-label{display:block;font-size:12.5px;color:var(--muted);letter-spacing:.02em;}
.fc-ver{display:block;font-family:var(--mono);font-size:28px;font-weight:600;color:var(--brand);line-height:1.2;margin:2px 0 6px;}
.fc-meta{display:block;font-size:12.5px;color:var(--ink-2);font-family:var(--mono);}

/* ---------- 速览条 ---------- */
.stat-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--paper-2);}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat{padding:26px 24px;border-right:1px solid var(--line);}
.stat:last-child{border-right:0;}
.stat-num{display:block;font-family:var(--mono);font-size:25px;font-weight:600;letter-spacing:-.01em;}
.stat-label{display:block;margin-top:6px;font-size:13px;color:var(--muted);}

/* ---------- 筛选标签 ---------- */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:34px;}
.chip{
  padding:8px 17px;border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:14px;color:var(--ink-2);
  transition:border-color .16s var(--ease),color .16s var(--ease),background .16s var(--ease),transform .16s var(--ease);
}
.chip:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.chip.is-active{background:var(--brand);border-color:var(--brand);color:#fff;}
.chip.is-active:hover{color:#fff;}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;}
.timeline::before{
  content:"";position:absolute;left:148px;top:10px;bottom:10px;width:1px;background:var(--line);
}
.tl-item{
  display:grid;grid-template-columns:148px 1fr;gap:36px;
  padding:32px 0;border-top:1px solid var(--line);
}
.tl-item[hidden]{display:none;}
.tl-item:first-of-type{border-top:0;}
.tl-time{position:relative;padding-top:2px;}
.tl-date{display:block;font-family:var(--mono);font-size:14px;color:var(--ink-2);}
.tl-channel{display:block;margin-top:6px;font-size:12.5px;color:var(--muted);}
.tl-dot{
  position:absolute;right:-41px;top:9px;width:9px;height:9px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 4px var(--paper);
}
.tl-head{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:12px;}
.ver-badge{
  display:inline-block;font-family:var(--mono);font-size:12.5px;font-weight:600;
  padding:3px 9px;border-radius:var(--r-tag);background:var(--brand-soft);color:var(--brand);
}
.tag-aux{
  display:inline-block;font-size:12.5px;padding:3px 9px;border-radius:var(--r-tag);
  border:1px solid rgba(47,111,107,.45);color:var(--aux);
}
.tl-plat{font-size:12.5px;color:var(--muted);font-family:var(--mono);}
.tl-title{font-size:19px;line-height:1.5;margin-bottom:12px;}
.tl-list li{
  position:relative;padding-left:18px;font-size:15.5px;color:var(--ink-2);line-height:1.8;
}
.tl-list li + li{margin-top:8px;}
.tl-list li::before{
  content:"";position:absolute;left:0;top:.78em;width:7px;height:1px;background:var(--brand);
}
.tl-empty{
  border:1px solid var(--line);border-radius:var(--r-card);background:#fff;
  padding:44px 24px;text-align:center;color:var(--muted);font-size:15px;
}
.tl-empty[hidden]{display:none;}
.tl-empty strong{display:block;font-family:var(--serif);font-size:19px;color:var(--ink);margin-bottom:8px;}

/* ---------- 图文与步骤 ---------- */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center;}
.split-media{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);
}
.split-media img{width:100%;aspect-ratio:3/2;object-fit:cover;}
.steps{border-top:1px solid var(--line);}
.step{
  display:grid;grid-template-columns:64px 1fr;gap:20px;
  padding:24px 0;border-bottom:1px solid var(--line);
}
.step-num{
  font-family:var(--mono);font-size:26px;font-weight:600;color:var(--brand);opacity:.85;line-height:1.2;
}
.step h3{font-size:18px;margin-bottom:6px;}
.step p{font-size:15px;color:var(--ink-2);}

/* ---------- 版本对照 ---------- */
.spec{display:grid;grid-template-columns:repeat(2,1fr);gap:0 56px;}
.spec-row{
  display:grid;grid-template-columns:132px 1fr;gap:18px;align-items:baseline;
  padding:16px 0;border-bottom:1px solid var(--line);
}
.spec-row dt{
  position:relative;padding-left:14px;font-size:14px;color:var(--muted);margin:0;
}
.spec-row dt::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;
  background:var(--aux);border-radius:2px;opacity:.75;
}
.spec-row dd{
  margin:0;font-size:15px;color:var(--ink);font-family:var(--mono);
  font-variant-numeric:tabular-nums;word-break:break-word;
}
.spec-note{margin-top:26px;font-size:13.5px;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-card);background:#fff;
  padding:0 24px;margin-bottom:12px;
  transition:box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.faq-item:hover{border-color:var(--brand-soft);box-shadow:var(--sh-1);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:18px;padding:20px 0;font-size:17px;font-weight:600;font-family:var(--serif);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-family:var(--sans);font-size:20px;color:var(--brand);
  font-weight:400;line-height:1;flex-shrink:0;
}
.faq-item[open] summary::after{content:"−";}
.faq-body{
  padding:18px 0 22px;border-top:1px solid var(--line);
  font-size:15.5px;color:var(--ink-2);line-height:1.85;
}

/* ---------- 深色 CTA ---------- */
.cta-band{
  display:grid;grid-template-columns:1fr auto;gap:48px;align-items:center;
  background:var(--dark);color:var(--dark-text);border-radius:var(--r-hero);
  padding:56px;
}
.cta-band h2{color:var(--dark-text);font-size:31px;line-height:1.3;margin-bottom:14px;}
.cta-band p{color:var(--dark-muted);font-size:15.5px;max-width:44em;}
.cta-eyebrow{
  display:inline-block;font-family:var(--mono);font-size:13px;color:var(--brand);
  background:rgba(178,58,46,.16);border-radius:var(--r-tag);padding:4px 10px;margin-bottom:16px;
}
.cta-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.cta-qr{display:flex;flex-direction:column;align-items:center;gap:12px;}
.qr{
  position:relative;width:120px;height:120px;border-radius:12px;background:var(--dark-text);
  overflow:hidden;
}
.qr::before{
  content:"";position:absolute;inset:12px;border-radius:4px;opacity:.88;
  background-image:
    repeating-linear-gradient(90deg,#14181B 0 6px,transparent 6px 12px),
    repeating-linear-gradient(0deg,#14181B 0 6px,transparent 6px 12px);
}
.qr::after{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:28px;height:28px;border-radius:6px;background:var(--brand);
  border:4px solid var(--dark-text);
}
.qr-tip{font-size:12.5px;color:var(--dark-muted);text-align:center;max-width:120px;line-height:1.6;}
.cta-foot{
  margin-top:20px;font-size:13px;color:var(--muted);font-family:var(--mono);
  letter-spacing:.01em;
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:var(--dark-text);padding:72px 0 30px;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:44px;border-bottom:1px solid rgba(237,234,228,.14);
}
.footer-brand{
  font-family:var(--serif);font-size:20px;font-weight:700;margin-bottom:14px;
}
.footer-brand span{color:var(--brand);}
.site-footer p{font-size:14px;color:var(--dark-muted);line-height:1.85;max-width:32em;}
.footer-col h4{
  font-family:var(--sans);font-size:14px;font-weight:600;color:var(--dark-text);
  margin-bottom:16px;letter-spacing:.02em;
}
.footer-col a{
  display:block;font-size:14px;color:var(--dark-muted);padding:5px 0;
  transition:color .16s var(--ease),transform .16s var(--ease);
}
.footer-col a:hover{color:var(--dark-text);transform:translateX(2px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;
  padding-top:24px;font-size:12.5px;color:var(--dark-muted);
}
.footer-bottom .num{font-family:var(--mono);}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:80;background:var(--paper);
  display:flex;flex-direction:column;padding:20px;
  transform:translateY(-8px);opacity:0;pointer-events:none;
  transition:opacity .22s var(--ease),transform .22s var(--ease);
}
.drawer.is-open{opacity:1;transform:none;pointer-events:auto;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;}
.drawer-close{
  width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;
  display:grid;place-items:center;font-size:18px;color:var(--ink);
}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{
  font-size:18px;padding:15px 0;border-bottom:1px solid var(--line);color:var(--ink-2);
}
.drawer-nav a.is-active{color:var(--brand);font-weight:600;}
.drawer-search{margin:26px 0 18px;}
.drawer-search input{
  width:100%;height:44px;padding:0 16px;border:1px solid var(--line);border-radius:10px;
  background:#fff;font-size:15px;
}
.drawer-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px var(--brand-soft);}
body.no-scroll{overflow:hidden;}

/* ---------- 入场动效 ---------- */
.js .reveal{opacity:0;transform:translateY(12px);}
.js .reveal.is-in{
  opacity:1;transform:none;
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}

/* ---------- 响应式 ---------- */
@media (max-width:1439px){
  .container{max-width:1200px;}
}
@media (max-width:1199px){
  .hero-grid{gap:44px;}
  .hero h1{font-size:44px;}
  .timeline::before{left:132px;}
  .tl-item{grid-template-columns:132px 1fr;gap:28px;}
  .tl-dot{right:-37px;}
  .spec{gap:0 40px;}
  .split{gap:40px;}
}
@media (max-width:991px){
  .nav-main{display:none;}
  .search-mini{display:none;}
  .hamburger{display:inline-flex;}
  .cta-icon-btn{display:inline-flex;}
  .header-right .btn-primary{display:none;}
  .hero{padding-top:82px;padding-bottom:56px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero h1{font-size:36px;}
  .hero-visual{min-height:380px;}
  .hv-img{width:52%;}
  .section{padding:72px 0;}
  .sec-title{font-size:26px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(2){border-right:0;}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line);}
  .split{grid-template-columns:1fr;gap:32px;}
  .split-media{order:-1;}
  .spec{grid-template-columns:1fr;gap:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{grid-template-columns:1fr;gap:32px;padding:40px;}
  .cta-qr{align-items:flex-start;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 20px;}
  .hero{padding-top:74px;}
  .hero h1{font-size:31px;}
  .hero-sub{font-size:16px;}
  .hero-actions .btn{width:100%;}
  .hero-visual{min-height:330px;}
  .hv-img{width:56%;right:16px;top:16px;}
  .float-card{left:16px;bottom:16px;width:min(300px,80%);}
  .fc-ver{font-size:23px;}
  .section{padding:56px 0;}
  .sec-title{font-size:24px;padding-left:14px;}
  .sec-title::before{height:22px;}
  .section-head{margin-bottom:32px;}
  .timeline::before{display:none;}
  .tl-item{grid-template-columns:1fr;gap:14px;padding:26px 0;}
  .tl-time{display:flex;align-items:center;gap:12px;padding-top:0;}
  .tl-date{font-size:13.5px;}
  .tl-channel{margin-top:0;}
  .tl-dot{display:none;}
  .tl-title{font-size:17.5px;}
  .tl-list li{font-size:15px;}
  .step{grid-template-columns:48px 1fr;gap:14px;}
  .step-num{font-size:22px;}
  .spec-row{grid-template-columns:1fr;gap:6px;}
  .cta-band{padding:32px 24px;border-radius:16px;}
  .cta-band h2{font-size:24px;}
  .cta-btns .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:480px){
  .container{padding:0 16px;}
  .hero h1{font-size:28px;}
  .stat{padding:20px 16px;}
  .stat-num{font-size:21px;}
  .tl-empty{padding:32px 18px;}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .js .reveal{opacity:1;transform:none;transition:none;}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
}

/* roulang page: category3 */
:root{
  --ink:#14181B;
  --ink-2:#2A2F33;
  --paper:#F7F4EF;
  --paper-2:#EFEAE2;
  --line:#DED7CB;
  --brand:#B23A2E;
  --brand-hover:#8F2B22;
  --brand-soft:rgba(178,58,46,.10);
  --aux:#2F6F6B;
  --muted:#6B6F73;
  --success:#2F6F6B;
  --warn:#B7791F;
  --error:#C0392B;
  --sh-1:0 1px 2px rgba(20,24,27,.06);
  --sh-2:0 10px 28px rgba(20,24,27,.10);
  --r-tag:6px;
  --r-btn:10px;
  --r-input:10px;
  --r-card:16px;
  --r-hero:20px;
  --r-img:12px;
  --c:1200px;
  --c-wide:1320px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);font-weight:700;color:var(--ink)}
p{margin:0 0 1.2em}
ul,ol{margin:0;padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.container{width:100%;max-width:var(--c);margin:0 auto;padding:0 24px}
.container-wide{width:100%;max-width:var(--c-wide);margin:0 auto;padding:0 24px}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:200}
.skip:focus{left:0}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(247,244,239,.86);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(247,244,239,.94)}
.header-inner{
  max-width:var(--c-wide);margin:0 auto;padding:0 24px;
  height:60px;display:flex;align-items:center;gap:28px;
}
.brand{
  font-family:var(--font-serif);font-weight:700;font-size:19px;letter-spacing:-.01em;
  white-space:nowrap;color:var(--ink);
}
.brand span{color:var(--brand)}
.nav-main{display:flex;align-items:center;gap:26px;margin-left:8px}
.nav-link{
  position:relative;font-size:15px;color:var(--ink-2);padding:19px 0;
  transition:color .14s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--brand)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:14px}
.search-mini{position:relative}
.search-mini input{
  width:190px;height:38px;padding:0 14px;border-radius:var(--r-input);
  border:1px solid var(--line);background:#fff;font-size:14px;
  transition:border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.search-mini input::placeholder{color:var(--muted)}
.search-mini input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px var(--brand-soft)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:#fff;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(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(-6px) rotate(-45deg)}
.drawer{
  display:none;background:var(--paper);border-top:1px solid var(--line);
  padding:18px 24px 26px;
}
.drawer.is-open{display:block}
.drawer a{
  display:block;font-size:18px;padding:12px 0;border-bottom:1px solid var(--line);color:var(--ink-2);
}
.drawer a.is-active{color:var(--brand);font-weight:600}
.drawer .drawer-cta{margin-top:20px;display:flex;flex-direction:column;gap:12px}
.drawer .search-mini input{width:100%;height:44px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1.5px solid transparent;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--brand);color:#fff;border-color:var(--brand);transform:translateY(-1px)}
.btn-outline-light{border-color:rgba(237,234,228,.55);color:#EDEAE4;background:transparent}
.btn-outline-light:hover{border-color:#EDEAE4;background:rgba(237,234,228,.08);transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn .arw{display:inline-block;transition:transform .18s var(--ease)}
.btn:hover .arw{transform:translateX(3px)}

/* ============ 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:var(--r-tag);
  font-size:13px;line-height:1.7;font-weight:600;
}
.badge-soft{background:var(--brand-soft);color:var(--brand)}
.badge-aux{border:1px solid var(--aux);color:var(--aux);background:transparent;font-weight:500}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:.14em;color:var(--muted);
  text-transform:uppercase;margin-bottom:16px;
}

/* ============ Hero ============ */
.hero{padding:88px 0 96px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.hero h1{
  font-size:52px;line-height:1.18;letter-spacing:-.02em;margin-bottom:20px;
}
.hero-sub{
  font-size:17px;line-height:1.85;color:var(--ink-2);max-width:34em;margin-bottom:32px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px}
.trust{
  display:flex;flex-wrap:wrap;gap:10px 26px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.trust li{display:flex;align-items:center;gap:8px}
.trust li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);opacity:.7}
.hero-visual{position:relative}
.hero-panel{
  position:relative;border-radius:var(--r-hero);overflow:hidden;
  border:1px solid var(--line);aspect-ratio:4/3;box-shadow:var(--sh-2);
}
.hero-panel .panel-bg{width:100%;height:100%;object-fit:cover}
.hero-panel::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(20,24,27,.32),rgba(20,24,27,.72));
}
.hero-inner{position:absolute;inset:0;z-index:2;display:flex;align-items:flex-end;padding:26px}
.hero-shot{width:74%;border-radius:var(--r-img);border:1px solid rgba(255,255,255,.28)}
.float-card{
  position:absolute;right:-16px;bottom:-26px;z-index:3;
  width:230px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 20px;box-shadow:var(--sh-2);
}
.float-card .badge{margin-bottom:12px}
.float-row{
  display:flex;justify-content:space-between;align-items:baseline;
  font-size:14px;color:var(--muted);padding:7px 0;border-bottom:1px dashed var(--line);
}
.float-row:last-child{border-bottom:none}
.float-row b{font-size:15px;color:var(--ink);font-weight:700}

/* ============ 板块通用 ============ */
.section{padding:104px 0}
.section.alt{background:var(--paper-2)}
.sec-head{margin-bottom:48px;max-width:720px}
.sec-title{position:relative;padding-left:18px;font-size:32px;line-height:1.3;margin-bottom:14px}
.sec-title::before{
  content:"";position:absolute;left:0;top:.3em;width:3px;height:28px;border-radius:2px;background:var(--brand);
}
.sec-desc{font-size:16px;color:var(--ink-2);line-height:1.85;margin:0}

/* ============ 要点条目行 ============ */
.facts{border-top:1px solid var(--line)}
.fact{
  display:grid;grid-template-columns:88px 1fr auto;gap:24px;align-items:center;
  padding:26px 8px;border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.fact:hover{background:var(--paper-2)}
.fact-idx{font-family:var(--font-serif);font-size:26px;font-weight:700;color:var(--brand);line-height:1}
.fact-body h3{font-size:20px;margin-bottom:6px}
.fact-body p{margin:0;font-size:15px;color:var(--ink-2);line-height:1.75;max-width:56em}
.fact-arw{color:var(--brand);font-size:20px;transition:transform .18s var(--ease)}
.fact:hover .fact-arw{transform:translateX(4px)}

/* ============ 对照矩阵 ============ */
.matrix{
  border:1px solid var(--line);border-radius:var(--r-card);background:#fff;box-shadow:var(--sh-1);
}
.matrix-head{
  display:grid;grid-template-columns:200px repeat(4,1fr);
  position:sticky;top:60px;z-index:6;
  background:var(--paper-2);border-bottom:1px solid var(--line);
  border-radius:var(--r-card) var(--r-card) 0 0;
}
.m-corner,.m-plat{padding:16px 18px;font-size:14px;display:flex;align-items:center}
.m-corner{color:var(--muted);font-weight:500}
.m-plat{
  font-family:var(--font-serif);font-weight:700;font-size:15px;color:var(--ink);
  border-left:1px solid var(--line);
}
.m-plat small{display:block;font-family:var(--font-sans);font-weight:400;font-size:12px;color:var(--muted);margin-top:2px}
.matrix-row{
  display:grid;grid-template-columns:200px repeat(4,1fr);
  border-bottom:1px solid var(--line);
  transition:background .16s var(--ease);
}
.matrix-row:last-child{border-bottom:none;border-radius:0 0 var(--r-card) var(--r-card)}
.matrix-row:hover{background:var(--paper-2)}
.m-label{
  position:relative;padding:16px 18px 16px 24px;
  font-size:14px;font-weight:600;color:var(--ink);background:var(--paper);
}
.m-label::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:4px;
  background:var(--aux);border-radius:0 2px 2px 0;
}
.m-cell{
  padding:16px 18px;border-left:1px solid var(--line);
  font-size:15px;color:var(--ink-2);display:flex;align-items:center;
}
.m-cell.is-key{color:var(--ink);font-weight:600}

/* ============ 明细 ============ */
.def-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.def-group{
  border:1px solid var(--line);border-radius:var(--r-card);background:#fff;overflow:hidden;box-shadow:var(--sh-1);
}
.def-group > h3{
  font-size:18px;padding:18px 22px;border-bottom:1px solid var(--line);background:#fff;
  display:flex;align-items:center;gap:10px;
}
.def-row{display:grid;grid-template-columns:190px 1fr;border-bottom:1px solid var(--line)}
.def-row:last-child{border-bottom:none}
.def-k{
  position:relative;padding:16px 20px 16px 26px;background:var(--paper);
  font-size:14px;font-weight:600;color:var(--ink);
}
.def-k::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:4px;
  background:var(--aux);border-radius:0 2px 2px 0;
}
.def-v{padding:16px 20px;font-size:15px;color:var(--ink-2)}
.def-v .num{color:var(--ink);font-weight:600}

/* ============ 场景卡片 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.scene-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-soft)}
.scene-card img{width:100%;aspect-ratio:3/2;object-fit:cover;border-bottom:1px solid var(--line)}
.scene-body{padding:24px}
.scene-body .badge{margin-bottom:12px}
.scene-body h3{font-size:20px;margin-bottom:10px}
.scene-body p{margin:0;font-size:15px;color:var(--ink-2);line-height:1.8}

/* ============ 流程 ============ */
.flow{border-top:1px solid var(--line)}
.flow-row{
  display:grid;grid-template-columns:88px 180px 1fr;gap:24px;align-items:start;
  padding:24px 8px;border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.flow-row:hover{background:var(--paper-2)}
.flow-idx{font-family:var(--font-serif);font-size:24px;font-weight:700;color:var(--brand);line-height:1.3}
.flow-row h3{font-size:18px;margin:0;padding-top:2px}
.flow-row p{margin:0;font-size:15px;color:var(--ink-2);line-height:1.8}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:22px 44px 22px 4px;position:relative;
  font-family:var(--font-serif);font-size:19px;font-weight:700;color:var(--ink);
  transition:color .16s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";position:absolute;right:8px;top:50%;width:12px;height:12px;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:translateY(-70%) rotate(45deg);transition:transform .2s var(--ease);
}
.faq-item[open] summary{color:var(--brand)}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq-item summary:hover{color:var(--brand)}
.faq-answer{padding:0 44px 24px 4px;font-size:16px;color:var(--ink-2);line-height:1.85;max-width:62em}
.faq-answer p:last-child{margin-bottom:0}

/* ============ 深色 CTA ============ */
.cta-dark{background:var(--ink);color:#EDEAE4}
.cta-dark .container{padding-top:88px;padding-bottom:88px}
.cta-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:center}
.cta-dark h2{color:#EDEAE4;font-size:34px;line-height:1.3;margin-bottom:16px}
.cta-dark p{color:#9A9E9F;font-size:16px;line-height:1.85;margin-bottom:0;max-width:36em}
.cta-side{display:flex;gap:28px;align-items:center;justify-content:flex-end;flex-wrap:wrap}
.cta-buttons{display:flex;flex-direction:column;gap:12px;min-width:190px}
.qr-box{text-align:center}
.qr{
  position:relative;width:120px;height:120px;background:#fff;border-radius:12px;
  padding:9px;box-shadow:0 0 0 1px rgba(237,234,228,.18);
}
.qr::before{
  content:"";position:absolute;inset:9px;border-radius:4px;
  background:repeating-conic-gradient(#14181B 0 25%,#ffffff 0 50%) 0 0/14px 14px;
  opacity:.88;
}
.qr-box span{display:block;margin-top:10px;font-size:12px;color:#9A9E9F;line-height:1.6}
.cta-meta{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(237,234,228,.16);
  display:flex;flex-wrap:wrap;gap:8px 28px;font-size:13px;color:#9A9E9F;
}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#EDEAE4;padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand{font-family:var(--font-serif);font-size:20px;font-weight:700;margin-bottom:14px}
.footer-brand span{color:var(--brand)}
.site-footer p{color:#9A9E9F;font-size:14px;line-height:1.85;margin:0}
.footer-col h4{color:#EDEAE4;font-size:15px;margin-bottom:16px;font-family:var(--font-sans);font-weight:600}
.footer-col a{
  display:block;color:#9A9E9F;font-size:14px;padding:6px 0;
  transition:color .16s var(--ease),transform .16s var(--ease);
}
.footer-col a:hover{color:#EDEAE4;transform:translateX(2px)}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(237,234,228,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#9A9E9F;
}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1439px){
  .container-wide{max-width:1200px}
}
@media (max-width:1199px){
  .hero h1{font-size:46px}
  .nav-main{gap:20px}
  .search-mini input{width:160px}
}
@media (max-width:991px){
  .nav-main{display:none}
  .search-mini{display:none}
  .nav-toggle{display:flex}
  .hero{padding:76px 0 80px}
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero h1{font-size:38px}
  .hero-visual{max-width:620px}
  .float-card{position:static;width:100%;margin-top:20px;box-shadow:var(--sh-1)}
  .section{padding:80px 0}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .def-grid{grid-template-columns:1fr}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .cta-side{justify-content:flex-start}
  .cta-buttons{flex-direction:row;flex-wrap:wrap;min-width:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .matrix-head{top:54px;grid-template-columns:170px repeat(4,1fr)}
  .matrix-row{grid-template-columns:170px repeat(4,1fr)}
  .m-corner,.m-plat,.m-label,.m-cell{padding:14px 14px}
  .m-label{padding-left:20px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container,.container-wide{padding:0 20px}
  .header-inner{height:54px;padding:0 20px;gap:14px}
  .brand{font-size:17px}
  .hero{padding:70px 0 64px}
  .hero h1{font-size:32px}
  .hero-sub{font-size:16px}
  .hero-cta{gap:12px}
  .hero-cta .btn{width:100%}
  .trust{flex-direction:column;gap:8px}
  .section{padding:60px 0}
  .sec-title{font-size:24px;padding-left:14px}
  .sec-title::before{height:22px}
  .fact{grid-template-columns:56px 1fr;gap:16px}
  .fact-arw{display:none}
  .flow-row{grid-template-columns:56px 1fr;gap:16px}
  .flow-row p{grid-column:2}
  .matrix-head{display:none}
  .matrix-row{grid-template-columns:1fr;border-bottom:2px solid var(--line)}
  .matrix-row:hover{background:transparent}
  .m-label{background:var(--paper-2)}
  .m-cell{border-left:none;border-top:1px solid var(--line);padding-left:20px;gap:12px}
  .m-cell::before{
    content:attr(data-plat);flex:0 0 96px;font-size:12px;color:var(--muted);line-height:1.6;
  }
  .def-row{grid-template-columns:130px 1fr}
  .def-k{padding-left:20px;font-size:13px}
  .def-v{font-size:14px;padding:14px 16px}
  .scene-grid{grid-template-columns:1fr}
  .faq-item summary{font-size:17px;padding-right:36px}
  .faq-answer{padding-right:8px}
  .cta-dark .container{padding-top:64px;padding-bottom:64px}
  .cta-dark h2{font-size:26px}
  .cta-buttons{width:100%}
  .cta-buttons .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .site-footer{padding:56px 0 24px}
}
@media (max-width:480px){
  .container,.container-wide{padding:0 16px}
  .hero h1{font-size:30px}
  .float-card{padding:16px}
  .matrix-row .m-cell::before{flex:0 0 80px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none !important;transition-duration:.01ms !important}
}

/* roulang page: category4 */
/* ============ 设计变量 ============ */
:root{
  --ink:#14181B;
  --ink-2:#2A2F33;
  --paper:#F7F4EF;
  --paper-2:#EFEAE2;
  --line:#DED7CB;
  --brand:#B23A2E;
  --brand-hover:#8F2B22;
  --brand-soft:rgba(178,58,46,.10);
  --aux:#2F6F6B;
  --muted:#6B6F73;
  --ok:#2F6F6B;
  --warn:#B7791F;
  --err:#C0392B;
  --dark:#14181B;
  --dark-2:#1D2226;
  --dark-text:#EDEAE4;
  --dark-sub:#9A9E9F;
  --sh-1:0 1px 2px rgba(20,24,27,.06);
  --sh-2:0 10px 28px rgba(20,24,27,.10);
  --r-tag:6px;
  --r-btn:10px;
  --r-input:10px;
  --r-card:16px;
  --r-panel:20px;
  --serif:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --ease:cubic-bezier(.2,.7,.3,1);
  --hdr:60px;
}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:var(--serif);
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--ink);
  margin:0;
  line-height:1.25;
}
h1{font-size:clamp(30px,4.2vw,54px);line-height:1.18;}
h2{font-size:clamp(24px,2.6vw,34px);line-height:1.3;}
h3{font-size:clamp(18px,1.6vw,22px);line-height:1.4;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
a{color:var(--brand);text-decoration:none;transition:color .16s var(--ease);}
a:hover{color:var(--brand-hover);}
img{max-width:100%;height:auto;display:block;}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

/* ============ 容器 ============ */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.container-wide{max-width:1320px;}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(247,244,239,.94);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:var(--hdr);
}
.brand{
  font-family:var(--serif);
  font-weight:700;
  font-size:19px;
  letter-spacing:-.01em;
  color:var(--ink);
  white-space:nowrap;
  flex:none;
}
.brand span{color:var(--brand);}
.brand:hover{color:var(--ink);}
.nav-main{
  display:flex;
  align-items:center;
  gap:18px;
  margin-right:auto;
}
.nav-link{
  position:relative;
  font-size:14px;
  color:var(--ink-2);
  padding:6px 0;
  white-space:nowrap;
  transition:color .14s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:0;
  height:2px;
  background:var(--brand);
  transition:width .18s var(--ease);
}
.nav-link:hover{color:var(--brand);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{width:100%;}
.header-actions{display:flex;align-items:center;gap:14px;flex:none;}
.search-btn{
  font-size:14px;
  color:var(--ink-2);
  border-bottom:1px dashed var(--line);
  padding-bottom:2px;
}
.search-btn:hover{color:var(--brand);border-color:var(--brand);}
.hamburger{
  display:none;
  width:40px;
  height:40px;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  background:#fff;
  cursor:pointer;
  padding:0;
  align-items:center;
  justify-content:center;
}
.hamburger span{
  display:block;
  width:16px;
  height:1.5px;
  background:var(--ink);
  position:relative;
}
.hamburger span::before,
.hamburger span::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:1.5px;
  background:var(--ink);
}
.hamburger span::before{top:-5px;}
.hamburger span::after{top:5px;}

/* 移动抽屉 */
.drawer{
  display:none;
  position:fixed;
  inset:var(--hdr) 0 0 0;
  background:var(--paper);
  z-index:79;
  padding:28px 24px 40px;
  overflow-y:auto;
  opacity:0;
  transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease);
}
.drawer.is-open{opacity:1;transform:translateY(0);display:block;}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--line);}
.drawer-nav a{
  font-size:18px;
  color:var(--ink);
  padding:16px 0;
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--brand);font-weight:600;}
.drawer-foot{margin-top:28px;display:flex;flex-direction:column;gap:14px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  border:1.5px solid transparent;
  cursor:pointer;
  background:none;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-ghost{border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-outline-light{border-color:rgba(237,234,228,.45);color:var(--dark-text);}
.btn-outline-light:hover{border-color:#fff;color:#fff;}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}
.btn-text{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  color:var(--brand);
}
.btn-text svg{transition:transform .18s var(--ease);}
.btn-text:hover svg{transform:translateX(3px);}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;transform:none;box-shadow:none;}

/* ============ Hero ============ */
.hero{
  position:relative;
  background-color:var(--dark);
  background-image:linear-gradient(105deg,rgba(20,24,27,.90) 0%,rgba(20,24,27,.76) 46%,rgba(20,24,27,.62) 100%),url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  color:var(--dark-text);
  padding:72px 0 84px;
  overflow:hidden;
}
.hero::after{
  content:"";
  position:absolute;
  right:-120px;
  bottom:-160px;
  width:420px;
  height:420px;
  border:1px solid rgba(237,234,228,.12);
  border-radius:50%;
  pointer-events:none;
}
.hero .container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--dark-sub);
  margin-bottom:26px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--dark-sub);}
.breadcrumb a:hover{color:var(--dark-text);}
.breadcrumb .sep{color:rgba(237,234,228,.34);}
.breadcrumb .cur{color:var(--dark-text);}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.28fr) minmax(0,.72fr);
  gap:56px;
  align-items:start;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.08em;
  padding:6px 12px;
  border-radius:var(--r-tag);
  background:var(--brand-soft);
  color:var(--brand);
  margin-bottom:22px;
  font-weight:600;
}
.eyebrow-dark{
  background:rgba(178,58,46,.20);
  color:#F0C3BC;
  border:1px solid rgba(178,58,46,.42);
}
.hero h1{color:var(--dark-text);margin-bottom:20px;}
.hero h1 em{font-style:normal;color:#E4A79D;}
.hero-sub{
  font-size:17px;
  line-height:1.8;
  color:#C9CCCB;
  max-width:38em;
  margin-bottom:30px;
}
.search-panel{
  background:rgba(247,244,239,.06);
  border:1px solid rgba(237,234,228,.16);
  border-radius:var(--r-panel);
  padding:18px;
  max-width:640px;
}
.search-field{
  display:flex;
  align-items:center;
  gap:12px;
  background:#fff;
  border:1.5px solid var(--line);
  border-radius:var(--r-input);
  height:52px;
  padding:0 16px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.search-field:focus-within{border-color:var(--brand);box-shadow:0 0 0 2px var(--brand-soft);}
.search-field svg{flex:none;color:var(--muted);}
.search-field input{
  flex:1;
  min-width:0;
  border:none;
  outline:none;
  height:100%;
  background:transparent;
  font-size:15px;
  color:var(--ink);
}
.search-field input::placeholder{color:#9AA0A4;}
.search-hint{
  font-size:13px;
  color:var(--dark-sub);
  margin:12px 0 0;
}
.quick-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:20px;
}
.quick-tag{
  font-size:13px;
  padding:7px 13px;
  border-radius:var(--r-tag);
  border:1px solid rgba(237,234,228,.26);
  background:rgba(237,234,228,.06);
  color:#DAD8D2;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.quick-tag:hover{border-color:#E4A79D;color:#fff;background:rgba(178,58,46,.20);}

.hero-side{
  border-left:1px solid rgba(237,234,228,.16);
  padding-left:32px;
}
.hero-side h2{
  font-size:18px;
  color:var(--dark-text);
  margin-bottom:18px;
  font-family:var(--sans);
  letter-spacing:0;
  font-weight:600;
}
.spec-list{border-top:1px solid rgba(237,234,228,.16);}
.spec-row{
  display:flex;
  justify-content:space-between;
  gap:16px;
  padding:13px 0;
  border-bottom:1px solid rgba(237,234,228,.12);
  font-size:14px;
}
.spec-row dt{color:var(--dark-sub);margin:0;}
.spec-row dd{margin:0;color:var(--dark-text);font-weight:600;}
.hero-side-note{
  font-size:13px;
  color:var(--dark-sub);
  margin-top:16px;
  line-height:1.7;
}

/* ============ 板块通用 ============ */
.board{padding:96px 0;}
.board-tight{padding:72px 0;}
.board-alt{background:var(--paper-2);}
.divider{border-top:1px solid var(--line);}
.sec-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:32px;
  margin-bottom:44px;
}
.sec-head-main{max-width:640px;}
.sec-head h2{
  position:relative;
  padding-left:16px;
  margin-bottom:14px;
}
.sec-head h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.22em;
  width:3px;
  height:28px;
  background:var(--brand);
  border-radius:2px;
}
.sec-head p{
  color:var(--muted);
  font-size:15px;
  margin:0;
  max-width:40em;
}
.sec-index{
  font-family:var(--serif);
  font-size:14px;
  color:var(--muted);
  letter-spacing:.1em;
  flex:none;
}

/* ============ 热门排行 ============ */
.rank-layout{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);
  gap:40px;
  align-items:start;
}
.rank-list{border-top:1px solid var(--line);}
.rank-item{
  display:flex;
  align-items:center;
  gap:20px;
  padding:20px 8px 20px 0;
  border-bottom:1px solid var(--line);
  transition:background .18s var(--ease),padding-left .18s var(--ease);
}
.rank-item:hover{background:var(--paper-2);padding-left:10px;}
.rank-no{
  font-family:var(--serif);
  font-size:20px;
  color:var(--brand);
  width:38px;
  flex:none;
}
.rank-body{flex:1;min-width:0;}
.rank-title{
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  margin-bottom:4px;
}
.rank-meta{
  font-size:13px;
  color:var(--muted);
  display:flex;
  gap:14px;
  flex-wrap:wrap;
}
.rank-count{color:var(--aux);font-weight:600;}
.rank-arrow{color:var(--line);flex:none;transition:color .18s var(--ease),transform .18s var(--ease);}
.rank-item:hover .rank-arrow{color:var(--brand);transform:translateX(3px);}

.side-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:box-shadow .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
}
.side-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-soft);}
.side-card img{
  width:100%;
  aspect-ratio:3/2;
  object-fit:cover;
  border-bottom:1px solid var(--line);
}
.side-card-body{padding:22px 24px 26px;}
.side-card-body h3{font-size:19px;margin-bottom:10px;}
.side-card-body p{font-size:14px;color:var(--muted);line-height:1.75;margin-bottom:16px;}

/* ============ 标签 / 徽章 ============ */
.tag{
  display:inline-flex;
  align-items:center;
  font-size:12px;
  line-height:1;
  padding:6px 10px;
  border-radius:var(--r-tag);
  background:var(--brand-soft);
  color:var(--brand);
  font-weight:600;
  white-space:nowrap;
}
.tag-aux{
  background:transparent;
  border:1px solid var(--aux);
  color:var(--aux);
}
.tag-muted{
  background:var(--paper-2);
  color:var(--muted);
  border:1px solid var(--line);
}

/* ============ 条目索引瀑布流 ============ */
.filter-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  padding:16px 20px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  margin-bottom:32px;
}
.filter-left{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.filter-left .tag-muted{cursor:pointer;}
.filter-left .tag-muted:hover{border-color:var(--brand);color:var(--brand);}
.filter-count{font-size:14px;color:var(--muted);}
.filter-count strong{color:var(--ink);font-size:16px;}

.index-grid{
  columns:3;
  column-gap:24px;
}
.index-card{
  display:block;
  break-inside:avoid;
  margin:0 0 24px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.index-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh-2);
  border-color:var(--brand-soft);
}
.index-card h3{
  font-size:18px;
  margin:14px 0 10px;
  line-height:1.45;
}
.index-card p{
  font-size:14px;
  color:var(--muted);
  line-height:1.75;
  margin-bottom:16px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.index-card-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-top:1px solid var(--line);
  padding-top:14px;
  font-size:13px;
  color:var(--muted);
}
.index-card-foot .go{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--brand);
  font-weight:600;
}
.index-card:hover .go svg{transform:translateX(3px);}
.index-card-foot .go svg{transition:transform .18s var(--ease);}

.empty-state{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--paper-2);
  padding:48px 24px;
  text-align:center;
}
.empty-state .empty-mark{
  width:54px;
  height:54px;
  margin:0 auto 18px;
  border:1px dashed var(--line);
  border-radius:50%;
  position:relative;
}
.empty-state .empty-mark::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  width:22px;
  height:1.5px;
  background:var(--brand);
  transform:translate(-50%,-50%);
}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:18px;}

/* ============ 资源支持卡 ============ */
.res-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.res-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  display:flex;
  flex-direction:column;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.res-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-soft);}
.res-card img{
  width:100%;
  aspect-ratio:3/2;
  object-fit:cover;
  border-bottom:1px solid var(--line);
}
.res-body{padding:24px;display:flex;flex-direction:column;flex:1;}
.res-body h3{font-size:19px;margin:12px 0 10px;}
.res-body p{font-size:14px;color:var(--muted);line-height:1.78;margin-bottom:20px;flex:1;}

/* ============ 三步自查 ============ */
.steps{border-top:1px solid var(--line);}
.step{
  display:grid;
  grid-template-columns:78px minmax(0,1fr) minmax(0,1.1fr);
  gap:28px;
  align-items:start;
  padding:28px 0;
  border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.step:hover{background:var(--paper-2);}
.step-no{
  font-family:var(--serif);
  font-size:26px;
  color:var(--brand);
  line-height:1.1;
}
.step h3{font-size:19px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--muted);line-height:1.78;margin:0;}

/* ============ FAQ ============ */
.faq{border-top:1px solid var(--line);}
.faq details{
  border-bottom:1px solid var(--line);
}
.faq summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:flex-start;
  gap:16px;
  padding:22px 0;
  font-family:var(--serif);
  font-size:18px;
  font-weight:700;
  color:var(--ink);
  transition:color .16s var(--ease);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--brand);}
.faq summary .qm{
  flex:none;
  width:24px;
  height:24px;
  border:1px solid var(--line);
  border-radius:var(--r-tag);
  color:var(--brand);
  font-size:13px;
  font-family:var(--sans);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  margin-top:3px;
}
.faq summary .plus{
  margin-left:auto;
  flex:none;
  width:16px;
  height:16px;
  position:relative;
  margin-top:9px;
}
.faq summary .plus::before,
.faq summary .plus::after{
  content:"";
  position:absolute;
  background:var(--muted);
  transition:transform .2s var(--ease),background .2s var(--ease);
}
.faq summary .plus::before{left:0;top:7px;width:16px;height:1.5px;}
.faq summary .plus::after{left:7px;top:0;width:1.5px;height:16px;}
.faq details[open] summary .plus::after{transform:scaleY(0);}
.faq details[open] summary .plus::before{background:var(--brand);}
.faq details[open] summary{color:var(--brand);}
.faq .faq-body{
  padding:0 0 24px 40px;
  max-width:760px;
  color:var(--ink-2);
  font-size:15px;
  line-height:1.85;
}

/* ============ CTA 深墨 ============ */
.cta-dark{
  background:var(--dark);
  color:var(--dark-text);
  padding:88px 0;
}
.cta-inner{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,.5fr);
  gap:56px;
  align-items:center;
}
.cta-dark h2{color:var(--dark-text);margin-bottom:16px;}
.cta-dark p{color:var(--dark-sub);font-size:15px;max-width:34em;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;margin:26px 0 18px;}
.cta-note{
  font-size:13px;
  color:var(--dark-sub);
  border-top:1px solid rgba(237,234,228,.14);
  padding-top:16px;
  margin:0;
}
.qr-box{
  text-align:center;
  border:1px solid rgba(237,234,228,.16);
  border-radius:var(--r-card);
  padding:20px;
  background:rgba(247,244,239,.04);
}
.qr-box svg{
  width:120px;
  height:120px;
  margin:0 auto 14px;
  border-radius:10px;
  background:#fff;
  display:block;
}
.qr-box span{font-size:13px;color:var(--dark-sub);line-height:1.6;display:block;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--dark);
  color:var(--dark-text);
  padding:72px 0 32px;
  border-top:1px solid rgba(237,234,228,.10);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
  gap:40px;
  padding-bottom:44px;
  border-bottom:1px solid rgba(237,234,228,.14);
}
.footer-brand{
  font-family:var(--serif);
  font-weight:700;
  font-size:21px;
  margin-bottom:16px;
}
.footer-brand span{color:#D9736A;}
.site-footer p{
  font-size:14px;
  line-height:1.8;
  color:var(--dark-sub);
  max-width:30em;
}
.footer-col h4{
  font-family:var(--sans);
  font-size:13px;
  letter-spacing:.06em;
  color:#B9BCBB;
  font-weight:600;
  margin-bottom:18px;
}
.footer-col a{
  display:block;
  font-size:14px;
  color:var(--dark-sub);
  padding:6px 0;
  transition:color .16s var(--ease);
}
.footer-col a:hover{color:var(--dark-text);}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  padding-top:26px;
  font-size:13px;
  color:var(--dark-sub);
}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .36s var(--ease),transform .36s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .nav-main{gap:14px;}
  .nav-link{font-size:13px;}
}
@media (max-width:1080px){
  .nav-main{display:none;}
  .hamburger{display:inline-flex;}
  .search-btn{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-side{border-left:none;border-top:1px solid rgba(237,234,228,.16);padding-left:0;padding-top:28px;}
  .index-grid{columns:2;}
  .res-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .rank-layout{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:900px){
  .cta-inner{grid-template-columns:1fr;gap:36px;}
  .qr-box{max-width:260px;}
  .step{grid-template-columns:56px minmax(0,1fr);gap:18px;}
  .step .step-desc{grid-column:2;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .board{padding:60px 0;}
  .board-tight{padding:52px 0;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:32px;}
  .sec-head p{font-size:14px;}
  .hero{padding:52px 0 60px;}
  .hero-sub{font-size:16px;}
  .index-grid{columns:1;}
  .res-grid{grid-template-columns:1fr;}
  .faq .faq-body{padding-left:0;}
  .cta-dark{padding:60px 0;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .header-inner{gap:12px;}
  .brand{font-size:17px;}
  .btn-sm{height:38px;padding:0 13px;font-size:13px;}
  .cta-actions .btn{width:100%;}
  .rank-item{gap:12px;padding:16px 0;}
  .rank-no{font-size:17px;width:30px;}
  .sec-index{display:none;}
  .quick-tags{gap:8px;}
  .quick-tag{font-size:12px;padding:6px 10px;}
  .hero::after{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}