/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --ink:#16211F;
  --ink-soft:#2C3A36;
  --cloud:#2F6F68;
  --clay:#C8603C;
  --paper:#F7F6F2;
  --paper-card:#FFFFFF;
  --line:#E2E0D8;
  --muted:#6E7A76;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(22,33,31,.04),0 10px 28px -14px rgba(22,33,31,.14);
  --shadow-2:0 14px 36px -16px rgba(22,33,31,.24);
  --ease:cubic-bezier(.2,.7,.2,1);
  --ff-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --ff-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --fs-display:clamp(34px,5vw,60px);
}
/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;padding:0;
  font-family:var(--ff-sans);
  font-size:16px;line-height:1.9;letter-spacing:.01em;
  color:var(--ink);background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto;background:var(--paper)}
a{color:var(--cloud);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--ink)}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--cloud);outline-offset:3px;border-radius:4px}
section{scroll-margin-top:130px}
/* ============ 容器 ============ */
.container-x{width:100%;max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px}
/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--paper);
  border-bottom:1px solid transparent;
  transition:box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-1)}
.header-top-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:15px 0}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:42px;height:42px;flex:0 0 auto;border-radius:12px;
  background:var(--ink);color:var(--paper);
  display:grid;place-items:center;
  font-family:var(--ff-serif);font-size:19px;font-weight:700;
  transition:background .24s var(--ease);
}
.brand:hover .brand-mark{background:var(--cloud)}
.brand-text{display:flex;flex-direction:column;line-height:1.3}
.brand-text strong{font-family:var(--ff-serif);font-size:19px;font-weight:700;letter-spacing:-.01em}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.06em}
.header-actions{display:flex;align-items:center;gap:12px}
.btn-ink-sm{
  display:inline-flex;align-items:center;gap:8px;
  height:42px;padding:0 20px;border-radius:var(--radius-btn);
  background:var(--ink);color:var(--paper);border:1px solid var(--ink);
  font-size:14px;font-weight:600;white-space:nowrap;
  transition:background .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease);
}
.btn-ink-sm:hover{background:var(--cloud);border-color:var(--cloud);color:#fff;transform:translateY(-1px)}
.header-nav{border-top:1px solid var(--line)}
.nav-scroll{
  display:flex;align-items:center;gap:8px;
  padding:10px 0;overflow-x:auto;
  scrollbar-width:none;-ms-overflow-style:none;scroll-snap-type:x proximity;
}
.nav-scroll::-webkit-scrollbar{display:none}
.nav-chip{
  flex:0 0 auto;scroll-snap-align:start;white-space:nowrap;
  padding:8px 17px;border-radius:999px;
  border:1px solid transparent;background:transparent;
  font-size:14px;color:var(--ink-soft);
  transition:color .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease);
}
.nav-chip:hover{color:var(--cloud);border-color:var(--line);background:var(--paper-card)}
.nav-chip.is-active{background:var(--ink);color:#fff;border-color:var(--ink)}
/* ============ 按钮 ============ */
.btn-primary{
  display:inline-flex;align-items:center;gap:10px;
  height:48px;padding:0 26px;border-radius:var(--radius-btn);
  background:var(--ink);color:var(--paper);border:1px solid var(--ink);
  font-size:15px;font-weight:600;
  transition:background .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.btn-primary:hover{background:var(--cloud);border-color:var(--cloud);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-primary .arrow{display:inline-block;transition:transform .24s var(--ease)}
.btn-primary:hover .arrow{transform:translateX(4px)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  background:transparent;color:var(--ink);border:1px solid var(--ink);
  font-size:15px;font-weight:600;
  transition:color .24s var(--ease),border-color .24s var(--ease),background .24s var(--ease);
}
.btn-ghost:hover{color:var(--cloud);border-color:var(--cloud);background:rgba(47,111,104,.06)}
/* ============ chip / 徽章 ============ */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  height:34px;padding:0 16px;border-radius:999px;
  border:1px solid var(--line);background:transparent;
  font-size:13.5px;color:var(--ink-soft);white-space:nowrap;
  transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.chip:hover{color:var(--cloud);border-color:var(--cloud);background:rgba(47,111,104,.06)}
.chip-cat{
  height:26px;padding:0 12px;border:0;
  background:rgba(47,111,104,.1);color:var(--cloud);
  font-size:12.5px;letter-spacing:.03em;border-radius:999px;
}
.chip-cat:hover{background:rgba(47,111,104,.16);color:var(--cloud)}
/* ============ Hero ============ */
.hero{padding:60px 0 28px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-block;margin-bottom:22px;
  padding:6px 15px;border-radius:999px;
  background:rgba(47,111,104,.1);color:var(--cloud);
  font-size:13px;letter-spacing:.06em;
}
h1{
  font-family:var(--ff-serif);
  font-size:clamp(30px,4.2vw,48px);
  line-height:1.22;letter-spacing:-.01em;font-weight:700;
  margin:0 0 20px;
}
h1 .hl{color:var(--cloud)}
.hero-sub{font-size:17px;line-height:1.85;color:var(--ink-soft);max-width:32em;margin:0 0 30px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-points{display:flex;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:22px}
.hero-points li{
  padding:0 24px;border-left:1px solid var(--line);
  font-size:13px;color:var(--muted);letter-spacing:.04em;
}
.hero-points li:first-child{padding-left:0;border-left:0}
.hero-points strong{
  display:block;font-family:var(--ff-serif);
  font-size:20px;line-height:1.4;color:var(--ink);font-weight:700;
}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:5/4;object-fit:cover;
  border-radius:var(--radius-img);
  border:1px solid var(--line);
}
.float-card{
  position:absolute;left:16px;bottom:16px;
  max-width:88%;padding:14px 18px;
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--radius-img);
  box-shadow:var(--shadow-1);
}
.float-card .float-label{
  display:block;font-size:12px;letter-spacing:.08em;
  color:var(--cloud);margin-bottom:4px;
}
.float-card p{font-size:13.5px;color:var(--ink-soft);line-height:1.6}
/* ============ 快速入口条 ============ */
.quickbar{padding:6px 0 0}
.quickbar-inner{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.quickbar-label{font-size:13px;letter-spacing:.08em;color:var(--muted);margin-right:6px}
/* ============ 板块通用 ============ */
.section{padding:88px 0}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;flex-wrap:wrap;margin-bottom:34px;
}
.section-head .kicker{
  display:block;font-size:13px;letter-spacing:.08em;
  color:var(--muted);margin-bottom:10px;
}
.section-head h2{
  font-family:var(--ff-serif);
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.3;letter-spacing:-.01em;font-weight:700;
}
.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;color:var(--cloud);
  padding-bottom:3px;border-bottom:1px solid transparent;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.link-more:hover{color:var(--cloud);border-bottom-color:var(--cloud)}
.link-more .arrow{transition:transform .22s var(--ease)}
.link-more:hover .arrow{transform:translateX(4px)}
/* ============ 主题封面区 ============ */
.topic-grid{display:grid;grid-template-columns:1.32fr 1fr;gap:24px;align-items:stretch}
.topic-side{display:grid;gap:24px;align-content:start}
.topic-card{
  display:flex;flex-direction:column;
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.topic-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#D8D5CB}
.topic-media{overflow:hidden}
.topic-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .45s var(--ease)}
.topic-card:hover .topic-media img{transform:scale(1.03)}
.topic-body{padding:24px 24px 26px}
.topic-body h3{
  font-family:var(--ff-serif);
  font-size:20px;line-height:1.45;font-weight:700;
  margin:12px 0 10px;
}
.topic-body p{font-size:14.5px;line-height:1.85;color:var(--muted);margin-bottom:16px}
.topic-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--muted);letter-spacing:.04em}
.topic-foot .go{color:var(--cloud);font-weight:600}
.topic-card-lg .topic-media img{aspect-ratio:16/9}
.topic-card-lg .topic-body{padding:28px 30px 30px}
.topic-card-lg .topic-body h3{font-size:24px}
.topic-card-lg .topic-body p{font-size:15px}
.topic-card-sm{display:grid;grid-template-columns:148px 1fr;align-items:stretch}
.topic-card-sm .topic-media{height:100%}
.topic-card-sm .topic-media img{height:100%;aspect-ratio:auto;min-height:180px}
.topic-card-sm .topic-body{padding:20px 22px}
.topic-card-sm .topic-body h3{font-size:17px;margin:8px 0 6px}
.topic-card-sm .topic-body p{font-size:13.5px;margin-bottom:10px}
/* ============ 合集目录 ============ */
.catalog-grid{display:grid;grid-template-columns:1fr 1fr .78fr;gap:30px;align-items:start}
.catalog-list{border-top:1px solid var(--line)}
.catalog-item{border-bottom:1px solid var(--line);transition:background .22s var(--ease)}
.catalog-item>a{
  display:grid;grid-template-columns:auto 1fr auto;
  gap:16px;align-items:center;
  padding:18px 12px;color:var(--ink);
}
.catalog-item:hover{background:var(--paper-card)}
.catalog-num{
  font-family:var(--ff-serif);font-size:26px;font-weight:700;
  line-height:1;color:var(--ink-soft);
  transition:color .22s var(--ease);
}
.catalog-item:hover .catalog-num{color:var(--clay)}
.catalog-title{font-size:16px;font-weight:600;line-height:1.5}
.catalog-desc{display:block;font-size:13px;color:var(--muted);margin-top:4px;font-weight:400;line-height:1.7}
.catalog-count{font-size:13px;color:var(--muted);letter-spacing:.06em;white-space:nowrap}
.catalog-aside{
  background:var(--paper-card);border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px 26px;box-shadow:var(--shadow-1);
}
.catalog-aside h3{font-family:var(--ff-serif);font-size:18px;margin-bottom:12px;line-height:1.5}
.catalog-aside p{font-size:14px;line-height:1.9;color:var(--muted);margin-bottom:14px}
.catalog-aside .divider{height:1px;background:var(--line);margin:18px 0}
.catalog-aside .mini{font-size:13px;color:var(--ink-soft);display:flex;justify-content:space-between;padding:7px 0;border-bottom:1px dashed var(--line)}
.catalog-aside .mini:last-child{border-bottom:0}
/* ============ 精选条目 ============ */
.pick-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.pick-card{
  display:flex;gap:18px;
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.pick-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#D8D5CB}
.pick-icon{
  flex:0 0 auto;width:44px;height:44px;border-radius:12px;
  display:grid;place-items:center;
  background:rgba(47,111,104,.1);color:var(--cloud);
  font-family:var(--ff-serif);font-size:18px;font-weight:700;
}
.pick-card h3{font-size:16.5px;line-height:1.5;font-weight:600;margin-bottom:8px}
.pick-card p{font-size:14px;line-height:1.85;color:var(--muted)}
/* ============ 最新信息 ============ */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.news-card{
  display:flex;flex-direction:column;
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 26px 22px;
  color:var(--ink);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#D8D5CB;color:var(--ink)}
.news-cat{
  align-self:flex-start;margin-bottom:14px;
  padding:3px 12px;border-radius:999px;
  background:rgba(47,111,104,.1);color:var(--cloud);
  font-size:12.5px;letter-spacing:.04em;
}
.news-title{
  font-family:var(--ff-serif);
  font-size:17px;line-height:1.55;font-weight:600;
  margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .22s var(--ease);
}
.news-card:hover .news-title{color:var(--cloud)}
.news-excerpt{
  font-size:14px;line-height:1.85;color:var(--muted);
  margin-bottom:18px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  gap:12px;font-size:13px;color:var(--muted);letter-spacing:.04em;
}
.news-go{color:var(--cloud);font-weight:600;white-space:nowrap}
.news-empty{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;
  padding:56px 24px;
  background:var(--paper-card);
  border:1px dashed var(--line);
  border-radius:var(--radius-card);
}
.news-empty-icon{font-size:22px;color:var(--cloud)}
.news-empty p{font-size:14.5px;color:var(--muted)}
/* ============ 相关推荐 ============ */
.rec-track{
  display:grid;grid-auto-flow:column;grid-auto-columns:272px;
  gap:20px;overflow-x:auto;padding-bottom:12px;
  scroll-snap-type:x mandatory;
  scrollbar-width:thin;
}
.rec-card{
  scroll-snap-align:start;
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;color:var(--ink);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.rec-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);color:var(--ink)}
.rec-card img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .45s var(--ease)}
.rec-card:hover img{transform:scale(1.03)}
.rec-body{padding:18px 20px 20px}
.rec-body h3{font-family:var(--ff-serif);font-size:16px;line-height:1.5;font-weight:600;margin-bottom:6px}
.rec-body p{font-size:13px;color:var(--muted);line-height:1.75}
/* ============ 收藏 / 分享 CTA 条 ============ */
.cta-strip{
  background:var(--ink);color:var(--paper);
  border-radius:16px;
  padding:48px 48px;
  display:flex;align-items:center;justify-content:space-between;
  gap:36px;flex-wrap:wrap;
}
.cta-strip h2{
  font-family:var(--ff-serif);
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.35;font-weight:700;margin-bottom:12px;
}
.cta-strip p{font-size:14.5px;line-height:1.85;color:rgba(247,246,242,.72);max-width:36em}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.share-btn{
  width:48px;height:48px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid rgba(247,246,242,.32);
  background:transparent;color:var(--paper);
  font-size:15px;
  transition:background .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease);
}
.share-btn:hover{background:var(--cloud);border-color:var(--cloud);color:#fff;transform:translateY(-2px)}
.star-btn{
  display:inline-flex;align-items:center;gap:8px;
  height:48px;padding:0 22px;border-radius:999px;
  border:1px solid rgba(247,246,242,.32);
  background:transparent;color:var(--paper);
  font-size:14px;font-weight:600;
  transition:background .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease);
}
.star-btn .star-icon{transition:color .24s var(--ease),transform .24s var(--ease)}
.star-btn:hover{border-color:var(--clay);color:#fff}
.star-btn.is-on{background:rgba(200,96,60,.16);border-color:var(--clay)}
.star-btn.is-on .star-icon{color:var(--clay);transform:scale(1.12)}
/* ============ FAQ ============ */
.faq-wrap{max-width:900px}
.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:center;justify-content:space-between;gap:20px;
  padding:22px 0;
  font-size:16px;font-weight:600;line-height:1.6;color:var(--ink);
  transition:color .22s var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";flex:0 0 auto;
  font-size:22px;line-height:1;color:var(--cloud);
  transition:transform .24s var(--ease);
}
.faq summary:hover{color:var(--cloud)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq-a{
  padding:0 0 24px;font-size:15px;line-height:1.95;
  color:var(--ink-soft);max-width:64em;
}
/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink);color:var(--paper);
  padding:72px 0 0;margin-top:96px;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .footer-logo{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(247,246,242,.12);color:var(--paper)}
.footer-brand .footer-logo strong{font-family:var(--ff-serif);font-size:18px;font-weight:700;letter-spacing:-.01em}
.footer-brand p{font-size:14px;line-height:1.9;color:rgba(247,246,242,.66);max-width:24em}
.footer-title{
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:rgba(247,246,242,.6);margin-bottom:16px;
}
.footer-links a{
  display:block;padding:6px 0;
  font-size:14px;color:rgba(247,246,242,.7);
  transition:color .22s var(--ease),transform .22s var(--ease);
}
.footer-links a:hover{color:#fff;transform:translateX(3px)}
.footer-note{font-size:13.5px;line-height:1.9;color:rgba(247,246,242,.62)}
.footer-note strong{color:rgba(247,246,242,.9);font-weight:600}
.footer-bottom{
  margin-top:56px;padding:24px 0;
  border-top:1px solid rgba(247,246,242,.14);
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(247,246,242,.55);letter-spacing:.03em;
}
/* ============ 滚动渐显 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .hero-grid{gap:40px}
  .catalog-grid{grid-template-columns:1fr 1fr .9fr;gap:24px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .footer-grid>div:last-child{grid-column:1/-1}
}
@media (max-width:991.98px){
  .hero{padding-top:44px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-media{order:-1}
  .hero-media img{aspect-ratio:16/10}
  .hero-sub,.hero-points{max-width:none}
  .section{padding:72px 0}
  .topic-grid{grid-template-columns:1fr}
  .topic-card-sm{grid-template-columns:130px 1fr}
  .catalog-grid{grid-template-columns:1fr 1fr}
  .catalog-aside{grid-column:1/-1}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-grid>div:last-child{grid-column:auto}
  .cta-strip{padding:38px 32px}
}
@media (max-width:767.98px){
  .container-x{padding-left:20px;padding-right:20px}
  .header-top-inner{padding:12px 0}
  .brand-text strong{font-size:17px}
  .brand-text em{display:none}
  .brand-mark{width:38px;height:38px;font-size:17px}
  .btn-ink-sm{height:38px;padding:0 16px;font-size:13px}
  .section{padding:64px 0}
  .pick-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .section-head{margin-bottom:26px}
  .catalog-grid{grid-template-columns:1fr}
  .rec-track{grid-auto-columns:240px}
  .site-footer{padding-top:56px;margin-top:72px}
  .cta-strip{padding:32px 24px;border-radius:14px}
  .footer-bottom{margin-top:40px}
}
@media (max-width:575.98px){
  .container-x{padding-left:18px;padding-right:18px}
  .hero{padding-top:34px}
  h1{font-size:clamp(28px,7.4vw,34px)}
  .hero-points li{padding:0 14px;font-size:12.5px}
  .hero-points strong{font-size:17px}
  .hero-cta{gap:10px}
  .hero-cta .btn-primary,.hero-cta .btn-ghost{width:100%;justify-content:center}
  .topic-card-sm{grid-template-columns:1fr}
  .topic-card-sm .topic-media img{min-height:0;aspect-ratio:16/9}
  .topic-body{padding:20px}
  .pick-card{padding:20px}
  .news-card{padding:20px}
  .section{padding:52px 0}
  .cta-strip{padding:28px 20px}
  .share-btn{width:44px;height:44px}
  .star-btn{width:100%;justify-content:center}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .quickbar-inner{padding:14px 0}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
}

/* roulang page: category1 */
/* =========================================================
   1. 设计变量
   ========================================================= */
:root{
  --ink:#16211F;
  --ink-soft:#2C3A36;
  --cloud:#2F6F68;
  --clay:#C8603C;
  --paper:#F7F6F2;
  --paper-card:#FFFFFF;
  --line:#E2E0D8;
  --muted:#6E7A76;

  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;

  --shadow-1:0 1px 2px rgba(22,33,31,.04),0 10px 28px -14px rgba(22,33,31,.14);
  --shadow-2:0 14px 36px -16px rgba(22,33,31,.24);

  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:240ms;

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;

  --fs-display:clamp(30px,4.2vw,50px);
  --fs-h2:clamp(22px,2.4vw,30px);
  --fs-h3:20px;
  --fs-body:16px;

  --gutter:24px;
  --section-y:96px;
}

/* =========================================================
   2. 基础 reset
   ========================================================= */
*,*::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:var(--fs-body);
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color var(--dur) var(--ease);}
a:hover{color:var(--cloud);}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink);margin:0;font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(47,111,104,.35);outline-offset:2px;border-radius:6px;}

/* =========================================================
   3. 容器与栅格
   ========================================================= */
.container-x{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 var(--gutter);
}
.row-x{
  display:flex;
  flex-wrap:wrap;
  gap:40px;
}
.col-4x{flex:0 0 300px;max-width:300px;}
.col-8x{flex:1 1 0;min-width:0;}

/* =========================================================
   4. 头部与导航
   ========================================================= */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(247,246,242,.94);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-1);
}
.header-top-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding-top:16px;
  padding-bottom:16px;
}
.brand{display:inline-flex;align-items:center;gap:12px;}
.brand-mark{
  width:40px;height:40px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--ink);
  color:var(--paper);
  border-radius:12px;
  font-family:var(--font-serif);
  font-size:19px;
  font-weight:700;
  flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{
  font-family:var(--font-serif);
  font-size:19px;
  font-weight:700;
  color:var(--ink);
  letter-spacing:.01em;
}
.brand-text em{
  font-style:normal;
  font-size:12px;
  color:var(--muted);
  letter-spacing:.08em;
}
.header-actions{display:flex;align-items:center;gap:12px;}
.btn-ink-sm{
  display:inline-flex;align-items:center;gap:8px;
  height:42px;padding:0 20px;
  background:var(--ink);
  color:var(--paper);
  border-radius:var(--r-btn);
  font-size:14px;font-weight:600;
  border:1px solid var(--ink);
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn-ink-sm:hover{background:var(--cloud);border-color:var(--cloud);color:#fff;transform:translateY(-1px);}
.btn-ink-sm i{font-size:12px;transition:transform var(--dur) var(--ease);}
.btn-ink-sm:hover i{transform:translateX(4px);}

.header-nav{border-top:1px solid var(--line);}
.nav-scroll{
  display:flex;
  gap:8px;
  padding-top:12px;
  padding-bottom:12px;
  overflow-x:auto;
  scrollbar-width:none;
  scroll-snap-type:x proximity;
}
.nav-scroll::-webkit-scrollbar{display:none;}
.nav-chip{
  flex:0 0 auto;
  scroll-snap-align:start;
  display:inline-flex;align-items:center;
  height:36px;padding:0 16px;
  border-radius:999px;
  border:1px solid var(--line);
  background:transparent;
  color:var(--muted);
  font-size:14px;
  font-weight:500;
  white-space:nowrap;
  position:relative;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-chip::after{
  content:"";
  position:absolute;left:16px;right:16px;bottom:6px;
  height:2px;background:var(--cloud);
  transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur) var(--ease);
}
.nav-chip:hover{color:var(--ink);border-color:var(--ink);}
.nav-chip:hover::after{transform:scaleX(1);}
.nav-chip.is-active{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--paper);
}
.nav-chip.is-active::after{transform:scaleX(0);}

/* =========================================================
   5. 面包屑
   ========================================================= */
.crumb-bar{padding:22px 0 0;}
.crumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;
  color:var(--muted);
  letter-spacing:.06em;
}
.crumb li{display:inline-flex;align-items:center;gap:8px;}
.crumb li+li::before{content:"/";color:var(--line);}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--cloud);}
.crumb li[aria-current]{color:var(--ink);font-weight:600;}

/* =========================================================
   6. 分类页主体（左目录 + 右内容）
   ========================================================= */
.cat-wrap{padding:36px 0 var(--section-y);}
.cat-hero-banner{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--paper-card);
  margin-bottom:36px;
}
.cat-hero-banner img{
  width:100%;
  height:210px;
  object-fit:cover;
  border-radius:0;
  opacity:.92;
}
.cat-hero-banner .banner-veil{
  position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(22,33,31,.82) 0%,rgba(22,33,31,.55) 52%,rgba(22,33,31,.18) 100%);
}
.banner-inner{
  position:absolute;inset:0;
  display:flex;flex-direction:column;justify-content:center;
  padding:28px 32px;
  gap:10px;
}
.banner-inner .chip-tag{
  align-self:flex-start;
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;
  border-radius:999px;
  background:rgba(247,246,242,.16);
  border:1px solid rgba(247,246,242,.32);
  color:#F7F6F2;
  font-size:12px;letter-spacing:.06em;
}
.banner-inner p{
  color:rgba(247,246,242,.86);
  font-size:14px;
  margin:0;
  letter-spacing:.02em;
}

/* 左栏：分类目录 */
.side-catalog{
  position:sticky;
  top:132px;
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px 22px;
  box-shadow:var(--shadow-1);
}
.side-catalog h2{
  font-size:16px;
  font-family:var(--font-sans);
  font-weight:600;
  letter-spacing:.06em;
  color:var(--ink-soft);
  margin-bottom:6px;
}
.side-catalog .side-sub{
  font-size:13px;
  color:var(--muted);
  margin:0 0 16px;
  line-height:1.7;
}
.cat-list li{border-top:1px solid var(--line);}
.cat-list li:first-child{border-top:0;}
.cat-list a{
  display:flex;align-items:flex-start;gap:12px;
  padding:14px 8px;
  border-radius:10px;
  transition:background var(--dur) var(--ease);
}
.cat-list a:hover{background:var(--paper);}
.cat-num{
  font-family:var(--font-serif);
  font-size:18px;
  line-height:1.4;
  color:var(--muted);
  min-width:26px;
  transition:color var(--dur) var(--ease);
}
.cat-list a:hover .cat-num{color:var(--clay);}
.cat-item-text{display:flex;flex-direction:column;gap:2px;}
.cat-item-text strong{font-size:15px;font-weight:600;color:var(--ink);}
.cat-item-text span{font-size:12px;color:var(--muted);letter-spacing:.04em;}
.side-note{
  margin-top:20px;
  padding-top:18px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
  line-height:1.8;
}
.side-note strong{color:var(--ink-soft);}

/* 右栏：正文流 */
.cat-main h1{
  font-size:var(--fs-display);
  line-height:1.15;
  margin-bottom:16px;
}
.cat-lede{
  font-size:17px;
  line-height:1.85;
  color:var(--ink-soft);
  max-width:720px;
  margin-bottom:22px;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  font-size:13px;
  color:var(--muted);
  letter-spacing:.06em;
  padding-bottom:24px;
  border-bottom:1px solid var(--line);
  margin-bottom:36px;
}
.meta-row .dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--clay);
  display:inline-block;
  margin-right:6px;
  vertical-align:middle;
}
.stat-strip{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
  margin-bottom:44px;
}
.stat-cell{
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:20px 18px;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.stat-cell:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.stat-cell .num{
  font-family:var(--font-serif);
  font-size:28px;
  font-weight:700;
  color:var(--ink);
  line-height:1.2;
}
.stat-cell .lbl{
  font-size:13px;
  color:var(--muted);
  letter-spacing:.04em;
}

.section-block{margin-bottom:56px;scroll-margin-top:140px;}
.section-block h2{
  font-size:var(--fs-h2);
  margin-bottom:10px;
}
.section-block .sec-sub{
  font-size:15px;
  color:var(--muted);
  margin-bottom:26px;
  max-width:680px;
}
.section-block h2::before{
  content:"";
  display:block;
  width:34px;height:2px;
  background:var(--cloud);
  margin-bottom:14px;
}

/* 入口类型：行式列表 */
.entry-rows{border-top:1px solid var(--line);}
.entry-row{
  display:flex;
  align-items:flex-start;
  gap:18px;
  padding:20px 8px;
  border-bottom:1px solid var(--line);
  transition:background var(--dur) var(--ease);
}
.entry-row:hover{background:var(--paper-card);}
.entry-row .row-num{
  font-family:var(--font-serif);
  font-size:24px;
  line-height:1.3;
  color:var(--muted);
  min-width:40px;
  transition:color var(--dur) var(--ease);
}
.entry-row:hover .row-num{color:var(--clay);}
.entry-row .row-body{flex:1 1 auto;min-width:0;}
.entry-row h3{font-size:18px;margin-bottom:4px;font-family:var(--font-sans);font-weight:600;}
.entry-row p{font-size:14px;color:var(--muted);margin:0;line-height:1.8;}
.entry-row .row-side{
  flex:0 0 auto;
  display:flex;align-items:center;gap:10px;
  font-size:12px;color:var(--muted);
  letter-spacing:.04em;
  padding-top:4px;
}
.entry-row .row-side i{font-size:12px;color:var(--cloud);transition:transform var(--dur) var(--ease);}
.entry-row:hover .row-side i{transform:translateX(4px);}

/* 检查清单 */
.check-card{
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
  box-shadow:var(--shadow-1);
}
.check-list{display:grid;gap:16px;}
.check-list li{
  display:flex;align-items:flex-start;gap:12px;
  font-size:15px;
  line-height:1.8;
}
.check-list li i{
  color:var(--cloud);
  font-size:14px;
  margin-top:7px;
  flex:0 0 auto;
}
.check-list li strong{color:var(--ink);font-weight:600;}

/* 步骤 */
.steps{display:grid;gap:14px;}
.step-card{
  display:flex;
  gap:18px;
  align-items:flex-start;
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#D5D2C7;}
.step-badge{
  flex:0 0 auto;
  width:42px;height:42px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:rgba(47,111,104,.10);
  color:var(--cloud);
  font-family:var(--font-serif);
  font-size:17px;font-weight:700;
}
.step-card h3{font-size:17px;font-family:var(--font-sans);font-weight:600;margin-bottom:4px;}
.step-card p{font-size:14px;color:var(--muted);margin:0;line-height:1.85;}

/* 图文块 */
.figure-block{
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:28px;
  align-items:center;
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  margin-bottom:14px;
}
.figure-block img{
  width:100%;
  height:230px;
  object-fit:cover;
  border-radius:var(--r-img);
}
.figure-block h3{font-size:19px;margin-bottom:8px;}
.figure-block p{font-size:14px;color:var(--muted);line-height:1.85;margin:0 0 10px;}
.mini-tags{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background:transparent;
  color:var(--muted);
  font-size:13px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.chip:hover{color:var(--ink);border-color:var(--ink);}
.chip.chip-solid{background:rgba(47,111,104,.10);border-color:transparent;color:var(--cloud);}

/* 异常对照 */
.compare-table{
  width:100%;
  border-collapse:collapse;
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  font-size:14px;
}
.compare-table th,.compare-table td{
  padding:14px 18px;
  text-align:left;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
.compare-table thead th{
  background:var(--paper);
  font-weight:600;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--ink-soft);
}
.compare-table tbody tr:nth-child(even){background:#FBFAF7;}
.compare-table tbody tr:last-child td{border-bottom:0;}
.compare-table td:first-child{font-weight:600;color:var(--ink);width:38%;}
.compare-table td:last-child{color:var(--muted);}

/* FAQ */
.faq-wrap{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 4px;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  transition:color var(--dur) var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--cloud);}
.faq-item summary .plus{
  flex:0 0 auto;
  font-size:15px;
  color:var(--muted);
  transition:transform var(--dur) var(--ease),color var(--dur) var(--ease);
}
.faq-item[open] summary .plus{transform:rotate(45deg);color:var(--cloud);}
.faq-answer{
  padding:0 4px 22px;
  font-size:15px;
  line-height:1.9;
  color:var(--muted);
  max-width:720px;
}

/* =========================================================
   7. 相关分类卡
   ========================================================= */
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.rel-card .rel-img{overflow:hidden;}
.rel-card img{
  width:100%;height:120px;object-fit:cover;
  border-radius:0;
  transition:transform 500ms var(--ease);
}
.rel-card:hover img{transform:scale(1.03);}
.rel-body{padding:16px 18px 18px;}
.rel-body h3{font-size:16px;font-family:var(--font-sans);font-weight:600;margin-bottom:4px;}
.rel-body p{font-size:13px;color:var(--muted);margin:0 0 10px;line-height:1.7;}
.rel-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;color:var(--cloud);
}
.rel-link i{transition:transform var(--dur) var(--ease);}
.rel-card:hover .rel-link i{transform:translateX(4px);}
.rel-card.is-current{border-color:var(--ink);}
.rel-card.is-current .rel-body h3{color:var(--cloud);}

/* =========================================================
   8. 收藏 / 分享 CTA 条
   ========================================================= */
.cta-strip{
  background:var(--ink);
  color:var(--paper);
  border-radius:var(--r-card);
  padding:44px 40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
  margin-top:8px;
}
.cta-strip h2{
  color:var(--paper);
  font-size:clamp(20px,2.2vw,26px);
  margin-bottom:6px;
}
.cta-strip p{color:rgba(247,246,242,.72);font-size:14px;margin:0;line-height:1.8;}
.cta-actions{display:flex;align-items:center;gap:12px;}
.share-btn{
  width:48px;height:48px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid rgba(247,246,242,.30);
  background:transparent;
  color:var(--paper);
  font-size:16px;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.share-btn:hover{background:var(--cloud);border-color:var(--cloud);color:#fff;transform:translateY(-2px);}
.star-btn{
  width:48px;height:48px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid rgba(247,246,242,.30);
  background:transparent;
  color:var(--paper);
  font-size:16px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.star-btn:hover{border-color:var(--clay);color:var(--clay);}
.star-btn.is-on{color:var(--clay);border-color:var(--clay);background:rgba(200,96,60,.12);}

/* =========================================================
   9. 页脚
   ========================================================= */
.site-footer{
  background:var(--ink);
  color:var(--paper);
  margin-top:var(--section-y);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-logo .brand-mark{background:rgba(247,246,242,.12);color:var(--paper);}
.footer-logo strong{
  font-family:var(--font-serif);
  font-size:17px;
  color:var(--paper);
}
.footer-brand p{font-size:14px;color:rgba(247,246,242,.60);line-height:1.85;margin:0;max-width:300px;}
.footer-title{
  font-size:13px;
  letter-spacing:.08em;
  color:rgba(247,246,242,.50);
  margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{
  font-size:14px;
  color:rgba(247,246,242,.72);
  position:relative;
  width:fit-content;
  transition:color var(--dur) var(--ease);
}
.footer-links a::after{
  content:"";position:absolute;left:0;bottom:-2px;
  width:100%;height:1px;background:var(--paper);
  transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur) var(--ease);
}
.footer-links a:hover{color:#fff;}
.footer-links a:hover::after{transform:scaleX(1);}
.footer-note{font-size:13px;color:rgba(247,246,242,.58);line-height:1.85;margin:0;}
.footer-note strong{color:rgba(247,246,242,.82);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(247,246,242,.14);
  padding:20px 0 28px;
  font-size:13px;
  color:rgba(247,246,242,.52);
  letter-spacing:.04em;
}

/* =========================================================
   10. 动效
   ========================================================= */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 500ms var(--ease),transform 500ms var(--ease);}
.reveal.is-in{opacity:1;transform:translateY(0);}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:color 200ms linear,background-color 200ms linear,border-color 200ms linear !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1 !important;transform:none !important;}
  .rel-card:hover img{transform:none;}
  .step-card:hover,.stat-cell:hover,.rel-card:hover{transform:none;}
}

/* =========================================================
   11. 响应式断点
   ========================================================= */
@media (max-width:1199.98px){
  :root{--section-y:80px;}
  .col-4x{flex:0 0 268px;max-width:268px;}
  .figure-block{grid-template-columns:1fr;}
  .figure-block img{height:200px;}
}

@media (max-width:991.98px){
  :root{--section-y:64px;--gutter:20px;}
  .row-x{gap:28px;}
  .col-4x,.col-8x{flex:1 1 100%;max-width:100%;}
  .side-catalog{position:static;top:auto;}
  .cat-list{display:grid;grid-template-columns:1fr 1fr;gap:0 18px;}
  .cat-list li:nth-child(2){border-top:0;}
  .related-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .cta-strip{padding:36px 28px;}
}

@media (max-width:767.98px){
  .header-top-inner{padding-top:12px;padding-bottom:12px;}
  .brand-text strong{font-size:17px;}
  .brand-text em{font-size:11px;}
  .btn-ink-sm{height:38px;padding:0 14px;font-size:13px;}
  .cat-hero-banner img{height:180px;}
  .banner-inner{padding:20px;}
  .cat-main h1{font-size:clamp(26px,7vw,34px);}
  .cat-lede{font-size:16px;}
  .check-card{padding:22px;}
  .step-card{padding:20px;gap:14px;}
  .compare-table{font-size:13px;}
  .compare-table th,.compare-table td{padding:12px 12px;}
  .compare-table td:first-child{width:44%;}
  .entry-row .row-side{display:none;}
}

@media (max-width:575.98px){
  :root{--gutter:18px;--section-y:52px;}
  .brand-mark{width:36px;height:36px;font-size:17px;border-radius:10px;}
  .brand-text em{display:none;}
  .header-actions .btn-ink-sm{width:auto;}
  .cat-list{grid-template-columns:1fr;}
  .cat-list li:nth-child(2){border-top:1px solid var(--line);}
  .stat-strip{grid-template-columns:1fr;}
  .related-grid{grid-template-columns:1fr;}
  .cta-strip{flex-direction:column;align-items:flex-start;padding:28px 22px;}
  .cta-actions{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .footer-brand p{max-width:none;}
  .figure-block img{height:170px;}
  .faq-item summary{font-size:15px;padding:18px 2px;}
  .entry-row .row-num{font-size:20px;min-width:32px;}
}

/* roulang page: article */
/* ===== 设计变量 ===== */
:root{
  --ink:#16211F;
  --ink-soft:#2C3A36;
  --cloud:#2F6F68;
  --clay:#C8603C;
  --paper:#F7F6F2;
  --paper-card:#FFFFFF;
  --line:#E2E0D8;
  --muted:#6E7A76;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(22,33,31,.04),0 10px 28px -14px rgba(22,33,31,.14);
  --shadow-2:0 14px 36px -16px rgba(22,33,31,.24);
  --ease:cubic-bezier(.2,.7,.2,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}

/* ===== 基础重置 ===== */
*,*::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:16px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:var(--cloud);}
button{font-family:inherit;}
ul,ol{margin:0;}
p{margin:0 0 1em;}
:focus-visible{outline:2px solid var(--cloud);outline-offset:3px;border-radius:4px;}

/* ===== 容器 ===== */
.container-x{width:100%;max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px;}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,242,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-1);}
.header-top-inner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding-top:16px;padding-bottom:16px;
}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:36px;height:36px;flex:0 0 auto;border-radius:10px;
  background:var(--ink);color:var(--paper);
  display:grid;place-items:center;
  font-family:var(--serif);font-size:16px;font-weight:700;
}
.brand-text strong{display:block;font-size:17px;font-weight:700;line-height:1.3;letter-spacing:.01em;}
.brand-text em{display:block;font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.06em;line-height:1.5;}
.btn-ink-sm{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--ink);color:var(--paper);
  font-size:13px;padding:10px 18px;border-radius:var(--radius-btn);
  transition:background .22s var(--ease),transform .22s var(--ease),color .22s var(--ease);
}
.btn-ink-sm:hover{background:var(--cloud);color:#fff;transform:translateY(-1px);}
.nav-scroll{
  display:flex;align-items:center;gap:6px;
  overflow-x:auto;
  padding-top:6px;padding-bottom:10px;
  scrollbar-width:none;
}
.nav-scroll::-webkit-scrollbar{display:none;}
.nav-chip{
  position:relative;flex:0 0 auto;
  font-size:13px;color:var(--ink-soft);
  padding:7px 14px;border-radius:999px;
  border:1px solid transparent;
  white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.nav-chip::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;
  background:var(--cloud);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-chip:hover{border-color:var(--line);color:var(--cloud);}
.nav-chip:hover::after{transform:scaleX(1);}
.nav-chip.is-active{background:var(--ink);color:var(--paper);border-color:var(--ink);}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  list-style:none;padding:0;margin:32px 0 26px;
  font-size:13px;color:var(--muted);letter-spacing:.02em;
}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li:not(:last-child)::after{content:"/";color:#C9C6BB;}
.breadcrumb li:last-child{color:var(--ink);}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--cloud);}

/* ===== 文章头部 ===== */
.article-head{
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:40px;
  box-shadow:var(--shadow-1);
}
.article-head-top{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;}
.article-type{
  display:inline-flex;align-items:center;gap:8px;
  height:26px;padding:0 12px;border-radius:999px;
  background:rgba(47,111,104,.10);color:var(--cloud);
  font-size:13px;letter-spacing:.02em;
}
.article-type .dot{width:6px;height:6px;border-radius:50%;background:var(--clay);}
.article-title{
  font-family:var(--serif);
  font-size:clamp(28px,3.4vw,42px);
  line-height:1.24;
  font-weight:700;
  letter-spacing:-.01em;
  margin:14px 0 0;
}
.article-lede{font-size:17px;line-height:1.85;color:var(--ink-soft);margin:18px 0 0;max-width:820px;}
.article-tools{display:flex;gap:8px;flex:0 0 auto;}
.icon-btn{
  width:42px;height:42px;border-radius:50%;
  border:1px solid var(--line);background:var(--paper-card);
  color:var(--ink-soft);display:grid;place-items:center;
  cursor:pointer;transition:all .22s var(--ease);
}
.icon-btn:hover{border-color:var(--cloud);color:var(--cloud);transform:translateY(-1px);}
.icon-btn.is-on{color:var(--clay);border-color:rgba(200,96,60,.45);}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:26px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);letter-spacing:.06em;
}
.article-meta .sep{width:1px;height:12px;background:var(--line);}
.article-cover{
  margin-top:28px;border:1px solid var(--line);border-radius:var(--radius-img);
  overflow:hidden;background:var(--paper);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;}

/* ===== 正文双栏 ===== */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 296px;
  gap:48px;align-items:start;margin-top:48px;
}
.article-body{max-width:760px;font-size:16px;line-height:1.9;}
.article-body h2{
  font-family:var(--serif);
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.4;font-weight:700;
  margin:1.9em 0 .75em;padding-left:16px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.34em;bottom:.34em;
  width:2px;background:var(--cloud);border-radius:2px;
}
.article-body h3{font-family:var(--serif);font-size:20px;line-height:1.5;margin:1.6em 0 .6em;font-weight:700;}
.article-body p{margin:0 0 1.2em;color:var(--ink-soft);}
.article-body strong{color:var(--ink);font-weight:600;}
.article-body a{color:var(--cloud);border-bottom:1px solid rgba(47,111,104,.35);}
.article-body a:hover{border-bottom-color:var(--cloud);}
.article-body ul,.article-body ol{padding-left:1.35em;margin:0 0 1.2em;color:var(--ink-soft);}
.article-body li{margin:.35em 0;}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;
  background:var(--paper);border-left:3px solid var(--cloud);
  border-radius:0 10px 10px 0;color:var(--ink-soft);
}
.article-body blockquote p{margin:0;}
.article-body img{border-radius:var(--radius-img);margin:1.6em 0 .5em;}
.article-body figure{margin:1.6em 0;}
.article-body figcaption{font-size:13px;color:var(--muted);margin-top:8px;letter-spacing:.02em;}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:14px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;vertical-align:top;}
.article-body th{background:var(--paper);font-weight:600;color:var(--ink);}
.article-body tbody tr:nth-child(even){background:var(--paper);}
.article-body code{background:var(--paper);padding:2px 6px;border-radius:6px;font-size:.92em;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0;}

/* 正文空态 */
.article-empty{
  background:var(--paper-card);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:44px 36px;text-align:center;
  box-shadow:var(--shadow-1);
}
.article-empty .empty-icon{
  width:56px;height:56px;border-radius:50%;margin:0 auto 18px;
  background:var(--paper);border:1px solid var(--line);
  display:grid;place-items:center;color:var(--cloud);font-size:20px;
}
.article-empty h2{font-family:var(--serif);font-size:24px;margin:0 0 10px;}
.article-empty p{color:var(--muted);font-size:15px;max-width:520px;margin:0 auto 22px;}

/* 侧栏目录 */
.toc-aside{position:relative;}
.toc-card{
  position:sticky;top:120px;
  background:var(--paper-card);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:22px;box-shadow:var(--shadow-1);
}
.toc-title{
  display:flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--muted);margin:0 0 12px;
}
.toc-title .bar{width:2px;height:12px;background:var(--cloud);border-radius:2px;}
.toc-list{list-style:none;padding:0;margin:0;font-size:14px;}
.toc-list li{border-top:1px solid var(--line);}
.toc-list li:first-child{border-top:0;}
.toc-list a{display:block;padding:9px 0;color:var(--ink-soft);line-height:1.6;}
.toc-list a:hover{color:var(--cloud);}
.toc-empty{padding:10px 0;color:var(--muted);font-size:13px;}
.toc-note{
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;line-height:1.8;color:var(--muted);
}

/* ===== 通用板块 ===== */
.section{margin-top:88px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.section-head h2{
  font-family:var(--serif);font-size:clamp(24px,2.6vw,34px);
  line-height:1.35;margin:0;font-weight:700;
}
.section-head .head-note{font-size:13px;color:var(--muted);letter-spacing:.06em;white-space:nowrap;}

/* ===== 推荐卡片 ===== */
.rec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.rec-card{
  display:flex;flex-direction:column;
  background:var(--paper-card);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.rec-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#D5D2C8;}
.rec-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--paper);}
.rec-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.rec-card:hover .rec-thumb img{transform:scale(1.03);}
.rec-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rec-tag{
  align-self:flex-start;height:24px;display:inline-flex;align-items:center;
  padding:0 10px;border-radius:999px;font-size:12px;
  background:rgba(47,111,104,.10);color:var(--cloud);
}
.rec-card h3{font-size:17px;line-height:1.6;font-weight:600;margin:0;color:var(--ink);}
.rec-card:hover h3{color:var(--cloud);}
.rec-card p{
  margin:0;font-size:14px;line-height:1.8;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rec-meta{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:12px;color:var(--muted);letter-spacing:.06em;
}
.rec-meta .arrow{transition:transform .22s var(--ease);color:var(--ink-soft);}
.rec-card:hover .rec-meta .arrow{transform:translateX(4px);color:var(--cloud);}

/* ===== 上下篇 ===== */
.pager-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.pager-item{
  display:flex;flex-direction:column;gap:8px;
  background:var(--paper-card);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:22px 24px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.pager-item:hover{border-color:var(--cloud);box-shadow:var(--shadow-1);transform:translateY(-2px);}
.pager-item.is-disabled{pointer-events:none;opacity:.7;}
.pager-label{font-size:12px;letter-spacing:.08em;color:var(--muted);}
.pager-title{font-size:16px;font-weight:600;line-height:1.6;}
.back-row{margin-top:24px;display:flex;justify-content:center;}
.back-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:var(--ink-soft);
  padding:12px 22px;border:1px solid var(--line);border-radius:999px;
  transition:all .22s var(--ease);
}
.back-link:hover{border-color:var(--cloud);color:var(--cloud);}

/* ===== FAQ ===== */
.faq-list{margin-top:6px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:20px 44px 20px 0;font-size:16px;font-weight:600;line-height:1.6;
  color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";position:absolute;right:8px;top:50%;
  transform:translateY(-50%);font-size:22px;line-height:1;color:var(--cloud);
  transition:transform .24s var(--ease);
}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg);}
.faq-answer{padding:0 0 22px;font-size:15px;line-height:1.9;color:var(--ink-soft);max-width:860px;}

/* ===== 收藏分享 CTA ===== */
.cta-bar{
  background:var(--ink);color:var(--paper);
  border-radius:var(--radius-card);
  padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  margin-top:88px;
}
.cta-bar h2{
  font-family:var(--serif);font-size:clamp(22px,2.4vw,30px);
  line-height:1.4;margin:0 0 8px;color:var(--paper);
}
.cta-bar p{margin:0;font-size:14px;line-height:1.8;color:rgba(247,246,242,.72);}
.share-group{display:flex;gap:12px;}
.share-btn{
  width:48px;height:48px;border-radius:50%;
  border:1px solid rgba(247,246,242,.28);background:transparent;color:var(--paper);
  display:grid;place-items:center;font-size:16px;cursor:pointer;
  transition:all .22s var(--ease);
}
.share-btn:hover{background:var(--cloud);border-color:var(--cloud);color:#fff;transform:translateY(-2px);}
.share-btn.is-on{color:var(--clay);border-color:rgba(200,96,60,.6);}

/* ===== 页脚 ===== */
.site-footer{background:var(--ink);color:var(--paper);margin-top:96px;padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand .footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:4px;}
.footer-brand .footer-logo strong{font-size:16px;font-weight:700;}
.footer-logo .brand-mark{background:var(--cloud);}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(247,246,242,.65);margin:14px 0 0;max-width:320px;}
.footer-title{font-size:13px;letter-spacing:.08em;color:rgba(247,246,242,.5);margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px;}
.footer-links a{
  color:rgba(247,246,242,.72);width:fit-content;
  border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.footer-links a:hover{color:#fff;border-bottom-color:rgba(247,246,242,.55);}
.footer-note{font-size:14px;line-height:1.85;color:rgba(247,246,242,.65);margin:0;max-width:320px;}
.footer-note strong{color:rgba(247,246,242,.9);font-weight:600;}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  margin-top:48px;padding-top:20px;
  border-top:1px solid rgba(247,246,242,.14);
  font-size:13px;color:rgba(247,246,242,.5);
}

/* ===== 滚动渐显 ===== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* ===== 响应式 ===== */
@media (max-width:1199.98px){
  .article-layout{gap:36px;grid-template-columns:minmax(0,1fr) 272px;}
}
@media (max-width:991.98px){
  .article-head{padding:30px;}
  .article-layout{grid-template-columns:1fr;gap:28px;}
  .toc-aside{order:-1;}
  .toc-card{position:static;}
  .toc-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0 20px;}
  .nav-scroll{scroll-snap-type:x proximity;}
  .nav-chip{scroll-snap-align:start;}
  .rec-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{margin-top:64px;}
  .cta-bar{margin-top:64px;}
}
@media (max-width:767.98px){
  .container-x{padding-left:18px;padding-right:18px;}
  .article-head{padding:24px 20px;}
  .article-head-top{flex-direction:column;gap:16px;}
  .article-tools{align-self:flex-start;}
  .article-title{font-size:clamp(26px,6vw,32px);}
  .breadcrumb{margin:22px 0 18px;}
  .section{margin-top:56px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .pager-grid{grid-template-columns:1fr;}
  .cta-bar{padding:32px 24px;gap:24px;}
}
@media (max-width:575.98px){
  .header-top-inner{padding-top:12px;padding-bottom:12px;}
  .brand-text strong{font-size:15px;}
  .brand-text em{font-size:11px;}
  .btn-ink-sm{padding:8px 12px;font-size:12px;}
  .rec-grid{grid-template-columns:1fr;}
  .toc-list{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .article-empty{padding:32px 20px;}
  .share-btn{width:44px;height:44px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition-property:color,background-color,border-color !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
/* ============================================================
   1. 设计变量
   ============================================================ */
:root{
  --ink:#16211F;
  --ink-soft:#2C3A36;
  --cloud:#2F6F68;
  --clay:#C8603C;
  --paper:#F7F6F2;
  --paper-card:#FFFFFF;
  --line:#E2E0D8;
  --muted:#6E7A76;

  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;

  --shadow-1:0 1px 2px rgba(22,33,31,.04),0 10px 28px -14px rgba(22,33,31,.14);
  --shadow-2:0 14px 36px -16px rgba(22,33,31,.24);

  --fs-display:clamp(34px,5vw,60px);
  --fs-h1:clamp(28px,4vw,44px);
  --fs-h2:clamp(24px,2.6vw,34px);
  --fs-h3:20px;
  --fs-body:16px;
  --fs-lede:17px;
  --fs-meta:13px;

  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:240ms;

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}

/* ============================================================
   2. 基础重置
   ============================================================ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:var(--fs-body);
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--ink-soft);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:var(--cloud)}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
h1,h2,h3,h4{
  font-family:var(--font-serif);
  color:var(--ink);
  margin:0;
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.3;
}
:focus-visible{
  outline:2px solid var(--cloud);
  outline-offset:3px;
  border-radius:4px;
}

/* ============================================================
   3. 容器与通用排版
   ============================================================ */
.container-x{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 24px;
}
.section{
  padding:88px 0;
}
.section-tight{padding:64px 0}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:var(--fs-meta);
  letter-spacing:.06em;
  color:var(--muted);
  text-transform:none;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:var(--clay);
  display:inline-block;
}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:32px;
  flex-wrap:wrap;
}
.section-head h2{
  font-size:var(--fs-h2);
  margin-top:10px;
}
.section-head .head-note{
  font-size:var(--fs-meta);
  color:var(--muted);
  letter-spacing:.06em;
}
.lede{
  font-size:var(--fs-lede);
  line-height:1.85;
  color:var(--ink-soft);
  max-width:62ch;
}
.muted{color:var(--muted)}

/* ============================================================
   4. 按钮 / chip / 徽章
   ============================================================ */
.btn-main,
.btn-ghost,
.btn-ink-sm{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  transition:background-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             transform var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.btn-main{
  height:48px;
  padding:0 24px;
  background:var(--ink);
  color:var(--paper);
  box-shadow:var(--shadow-1);
}
.btn-main:hover{
  background:var(--cloud);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:var(--shadow-2);
}
.btn-main .fa-arrow-right{transition:transform var(--dur) var(--ease)}
.btn-main:hover .fa-arrow-right{transform:translateX(4px)}
.btn-ghost{
  height:48px;
  padding:0 24px;
  border:1px solid var(--ink);
  color:var(--ink);
  background:transparent;
}
.btn-ghost:hover{
  border-color:var(--cloud);
  color:var(--cloud);
  background:transparent;
}
.btn-ink-sm{
  height:40px;
  padding:0 20px;
  background:var(--ink);
  color:var(--paper);
  font-size:14px;
}
.btn-ink-sm:hover{background:var(--cloud);color:#fff}

.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background:transparent;
  color:var(--muted);
  font-size:13px;
  line-height:1;
  white-space:nowrap;
  transition:color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             background-color var(--dur) var(--ease);
}
.chip:hover{color:var(--cloud);border-color:var(--cloud)}
.chip.is-on{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--paper);
}
.badge-soft{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  background:rgba(47,111,104,.1);
  color:var(--cloud);
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
}

/* ============================================================
   5. 站点导航
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,246,242,.96);
  backdrop-filter:saturate(140%) blur(8px);
  transition:box-shadow var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-1);
}
.header-top-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:74px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:var(--ink);
}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:38px;height:38px;
  border-radius:11px;
  background:var(--ink);
  color:var(--paper);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-family:var(--font-serif);
  font-size:18px;
  font-weight:700;
  flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{
  font-family:var(--font-serif);
  font-size:17px;
  font-weight:700;
  letter-spacing:0;
}
.brand-text em{
  font-style:normal;
  font-size:12px;
  color:var(--muted);
  letter-spacing:.08em;
}
.header-actions{display:flex;align-items:center;gap:12px}

.header-nav{border-top:1px solid var(--line)}
.nav-scroll{
  display:flex;
  align-items:center;
  gap:8px;
  padding-top:10px;
  padding-bottom:10px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
  scroll-snap-type:x proximity;
}
.nav-scroll::-webkit-scrollbar{display:none}
.nav-chip{
  flex:0 0 auto;
  scroll-snap-align:start;
  display:inline-flex;
  align-items:center;
  height:34px;
  padding:0 16px;
  border-radius:8px;
  font-size:14px;
  color:var(--ink-soft);
  border-bottom:2px solid transparent;
  transition:background-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.nav-chip:hover{background:rgba(47,111,104,.08);color:var(--cloud)}
.nav-chip.is-active{
  background:var(--ink);
  color:var(--paper);
  border-bottom-color:var(--ink);
}
.nav-chip.is-active:hover{background:var(--ink);color:var(--paper)}

/* ============================================================
   6. 面包屑
   ============================================================ */
.crumb-wrap{padding:22px 0 0}
.crumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:var(--fs-meta);
  color:var(--muted);
  letter-spacing:.04em;
}
.crumb li{display:inline-flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:var(--line)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--cloud)}
.crumb li:last-child{color:var(--ink)}

/* ============================================================
   7. 分类通栏横幅
   ============================================================ */
.cat-banner{
  padding:40px 0 56px;
  border-bottom:1px solid var(--line);
  background:
    linear-gradient(180deg,rgba(47,111,104,.055),rgba(247,246,242,0) 78%),
    var(--paper);
}
.banner-inner{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  gap:48px;
  align-items:end;
}
.banner-left h1{
  font-size:var(--fs-h1);
  margin:14px 0 16px;
  line-height:1.22;
}
.banner-left h1 .thin{
  display:block;
  font-size:.52em;
  font-weight:400;
  color:var(--muted);
  letter-spacing:.02em;
  margin-top:10px;
  font-family:var(--font-sans);
}
.banner-left .lede{max-width:56ch}
.banner-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  margin-top:24px;
  font-size:var(--fs-meta);
  color:var(--muted);
  letter-spacing:.06em;
}
.banner-meta span{display:inline-flex;align-items:center;gap:8px}
.banner-meta span+span::before{
  content:"";
  width:1px;height:12px;
  background:var(--line);
  display:inline-block;
  margin-right:6px;
}

.chip-group-panel{
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:24px;
}
.chip-group-panel .panel-title{
  font-size:var(--fs-meta);
  letter-spacing:.08em;
  color:var(--muted);
  margin-bottom:14px;
  display:block;
}
.chip-group{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.chip-group .chip{height:32px;padding:0 14px;font-size:13px}
.panel-foot{
  margin-top:20px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
  line-height:1.8;
}

/* ============================================================
   8. 横向宽条目列表
   ============================================================ */
.wide-list{border-top:1px solid var(--line)}
.wide-item{
  display:grid;
  grid-template-columns:72px minmax(0,1fr) 150px 40px;
  align-items:center;
  gap:24px;
  padding:26px 16px;
  border-bottom:1px solid var(--line);
  border-radius:10px;
  transition:background-color var(--dur) var(--ease),
             transform var(--dur) var(--ease);
}
.wide-item:hover{
  background:var(--paper-card);
  transform:translateX(2px);
}
.wide-num{
  font-family:var(--font-serif);
  font-size:28px;
  font-weight:700;
  color:var(--ink);
  line-height:1;
  transition:color var(--dur) var(--ease);
}
.wide-item:hover .wide-num{color:var(--clay)}
.wide-body h3{
  font-size:18px;
  font-weight:600;
  font-family:var(--font-sans);
  margin-bottom:6px;
  transition:color var(--dur) var(--ease);
}
.wide-item:hover .wide-body h3{color:var(--cloud)}
.wide-body p{
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
  margin:0;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.wide-time{
  font-size:var(--fs-meta);
  color:var(--muted);
  letter-spacing:.06em;
  text-align:right;
}
.wide-arrow{
  width:36px;height:36px;
  border-radius:999px;
  border:1px solid var(--line);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--ink-soft);
  transition:background-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             transform var(--dur) var(--ease);
}
.wide-item:hover .wide-arrow{
  background:var(--cloud);
  border-color:var(--cloud);
  color:#fff;
  transform:translateX(4px);
}

/* ============================================================
   9. 图文分栏
   ============================================================ */
.split{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:56px;
  align-items:center;
}
.split-figure{
  position:relative;
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--paper);
  box-shadow:var(--shadow-1);
}
.split-figure img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  transition:transform 500ms var(--ease);
}
.split-figure:hover img{transform:scale(1.03)}
.split-caption{
  font-size:var(--fs-meta);
  color:var(--muted);
  margin-top:12px;
  letter-spacing:.04em;
}
.split-body h2{font-size:var(--fs-h2);margin-bottom:18px}
.split-body p{color:var(--ink-soft);max-width:52ch}
.rule-list{
  margin-top:26px;
  border-top:1px solid var(--line);
}
.rule-list li{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:14px;
  padding:16px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;
  color:var(--ink-soft);
  line-height:1.8;
}
.rule-list li i{
  color:var(--cloud);
  font-size:14px;
  margin-top:6px;
}

/* ============================================================
   10. 提示卡组
   ============================================================ */
.note-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.note-card{
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px 24px;
  box-shadow:var(--shadow-1);
  transition:transform var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.note-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.note-card .note-idx{
  font-family:var(--font-serif);
  font-size:20px;
  font-weight:700;
  color:var(--clay);
  display:block;
  margin-bottom:12px;
}
.note-card h3{
  font-size:17px;
  font-family:var(--font-sans);
  font-weight:600;
  margin-bottom:10px;
}
.note-card p{font-size:14px;line-height:1.85;color:var(--muted);margin:0}

/* ============================================================
   11. FAQ
   ============================================================ */
.faq-list{border-top:1px solid var(--line);max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 4px;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  transition:color var(--dur) var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--cloud)}
.faq-item summary .plus{
  flex:0 0 auto;
  width:24px;height:24px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
  transition:transform 240ms var(--ease),color var(--dur) var(--ease);
}
.faq-item[open] summary .plus{transform:rotate(45deg);color:var(--clay)}
.faq-answer{
  padding:0 4px 24px;
  font-size:15px;
  line-height:1.9;
  color:var(--muted);
}
.faq-item[open] .faq-answer{color:var(--ink-soft)}

/* ============================================================
   12. 相关分类窄卡
   ============================================================ */
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.rel-card{
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:24px;
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  transition:transform var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.rel-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-2);
  border-color:rgba(47,111,104,.4);
  color:inherit;
}
.rel-card .rel-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
}
.rel-card h3{
  font-size:17px;
  font-family:var(--font-sans);
  font-weight:600;
}
.rel-card p{font-size:14px;color:var(--muted);line-height:1.8;margin:0}
.rel-card .rel-go{
  font-size:13px;
  color:var(--cloud);
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:4px;
}
.rel-card:hover .rel-go{gap:12px}
.rel-card.is-current{
  border-color:rgba(47,111,104,.5);
  background:rgba(47,111,104,.045);
}

/* ============================================================
   13. 收藏 / 分享 CTA 条
   ============================================================ */
.share-bar{
  background:var(--ink);
  color:var(--paper);
  border-radius:var(--radius-card);
  padding:48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  flex-wrap:wrap;
}
.share-bar h2{
  color:var(--paper);
  font-size:clamp(22px,2.4vw,30px);
  margin-bottom:10px;
}
.share-bar p{
  color:rgba(247,246,242,.72);
  font-size:15px;
  margin:0;
  max-width:46ch;
}
.share-actions{display:flex;align-items:center;gap:12px}
.share-btn{
  width:48px;height:48px;
  border-radius:999px;
  border:1px solid rgba(247,246,242,.32);
  color:var(--paper);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:16px;
  transition:background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             transform var(--dur) var(--ease);
}
.share-btn:hover{
  background:var(--cloud);
  border-color:var(--cloud);
  color:#fff;
  transform:translateY(-2px);
}
.star-btn{
  width:48px;height:48px;
  border-radius:999px;
  border:1px solid rgba(247,246,242,.32);
  color:var(--paper);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:16px;
  transition:background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             transform var(--dur) var(--ease);
}
.star-btn:hover{border-color:rgba(247,246,242,.6);transform:translateY(-2px)}
.star-btn.is-on{
  background:rgba(200,96,60,.18);
  border-color:var(--clay);
  color:var(--clay);
}

/* ============================================================
   14. 页脚
   ============================================================ */
.site-footer{
  background:var(--ink);
  color:var(--paper);
  padding:72px 0 0;
  margin-top:88px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr .8fr .8fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-logo{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:18px;
}
.footer-logo .brand-mark{
  background:rgba(247,246,242,.1);
  color:var(--paper);
  border:1px solid rgba(247,246,242,.22);
}
.footer-logo strong{
  font-family:var(--font-serif);
  font-size:17px;
  color:var(--paper);
  font-weight:700;
}
.footer-brand p{
  color:rgba(247,246,242,.66);
  font-size:14px;
  line-height:1.85;
  max-width:34ch;
}
.footer-title{
  font-size:13px;
  letter-spacing:.08em;
  color:rgba(247,246,242,.5);
  margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{
  font-size:14px;
  color:rgba(247,246,242,.7);
  position:relative;
  width:fit-content;
  padding-bottom:2px;
}
.footer-links a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:1px;
  background:var(--paper);
  transition:width var(--dur) var(--ease);
}
.footer-links a:hover{color:#fff}
.footer-links a:hover::after{width:100%}
.footer-note{
  font-size:14px;
  color:rgba(247,246,242,.66);
  line-height:1.85;
}
.footer-note strong{color:rgba(247,246,242,.9);font-weight:600}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:22px 0 28px;
  border-top:1px solid rgba(247,246,242,.14);
  font-size:13px;
  color:rgba(247,246,242,.5);
  letter-spacing:.04em;
}

/* ============================================================
   15. 滚动渐显
   ============================================================ */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity 500ms var(--ease),transform 500ms var(--ease);
}
.reveal.is-in{opacity:1;transform:none}

/* ============================================================
   16. 响应式断点
   ============================================================ */
@media (max-width:1199.98px){
  .section{padding:80px 0}
  .split{gap:40px}
}

@media (max-width:991.98px){
  .banner-inner{grid-template-columns:1fr;gap:28px}
  .split{grid-template-columns:1fr;gap:32px}
  .split-figure{order:-1}
  .note-grid{grid-template-columns:1fr 1fr}
  .related-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .wide-item{
    grid-template-columns:56px minmax(0,1fr) 40px;
    gap:16px;
    padding:22px 12px;
  }
  .wide-time{display:none}
  .share-bar{padding:36px}
}

@media (max-width:767.98px){
  .container-x{padding:0 18px}
  .section{padding:60px 0}
  .section-tight{padding:48px 0}
  .header-top-inner{min-height:66px;gap:12px}
  .brand-text strong{font-size:15px}
  .brand-text em{font-size:11px;letter-spacing:.04em}
  .brand-mark{width:34px;height:34px;font-size:16px;border-radius:10px}
  .btn-ink-sm{height:36px;padding:0 14px;font-size:13px}
  .cat-banner{padding:28px 0 40px}
  .banner-left h1 .thin{font-size:.5em}
  .note-grid{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .site-footer{padding-top:56px;margin-top:60px}
  .footer-brand{grid-column:1 / -1}
  .share-bar{padding:28px;gap:24px}
  .share-actions{width:100%}
}

@media (max-width:575.98px){
  .section{padding:52px 0}
  .banner-left h1{font-size:26px}
  .wide-item{
    grid-template-columns:44px minmax(0,1fr);
    gap:12px;
    padding:20px 8px;
  }
  .wide-arrow{display:none}
  .wide-num{font-size:22px}
  .wide-body h3{font-size:16px}
  .btn-main,.btn-ghost{width:100%}
  .note-card{padding:20px}
  .share-actions{flex-wrap:wrap}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{font-size:12px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
  .wide-item:hover{transform:none}
  .rel-card:hover,.note-card:hover,.share-btn:hover,.btn-main:hover{transform:none}
  .split-figure:hover img{transform:none}
}

/* roulang page: category3 */
/* ============================================================
   1. 设计变量
   ============================================================ */
:root{
  --ink:#16211F;
  --ink-soft:#2C3A36;
  --cloud:#2F6F68;
  --clay:#C8603C;
  --paper:#F7F6F2;
  --paper-card:#FFFFFF;
  --line:#E2E0D8;
  --muted:#6E7A76;
  --shadow-1:0 1px 2px rgba(22,33,31,.04),0 10px 28px -14px rgba(22,33,31,.14);
  --shadow-2:0 14px 36px -16px rgba(22,33,31,.24);
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --fs-display:clamp(34px,5vw,58px);
}

/* ============================================================
   2. 基础 reset
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-soft);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-family:var(--serif);font-weight:700;line-height:1.35;}
p{margin:0;}
a{color:var(--cloud);text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:var(--ink);}
img{max-width:100%;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--cloud);outline-offset:3px;border-radius:4px;}

/* ============================================================
   3. 容器与栅格
   ============================================================ */
.container-x{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.grid{
  display:grid;
  gap:24px;
}
.grid-7-5{grid-template-columns:minmax(0,7fr) minmax(0,5fr);}
.grid-5-7{grid-template-columns:minmax(0,5fr) minmax(0,7fr);}
.grid-8-4{grid-template-columns:minmax(0,8fr) minmax(0,4fr);}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}

/* ============================================================
   4. 头部导航（分段标签式）
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,246,242,.96);
  backdrop-filter:saturate(120%) blur(6px);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-1);
  background:rgba(247,246,242,.99);
}
.header-top-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding-top:16px;
  padding-bottom:14px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:var(--ink);
  min-width:0;
}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:40px;
  height:40px;
  flex:0 0 40px;
  border-radius:12px;
  background:var(--ink);
  color:var(--paper);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-family:var(--serif);
  font-size:19px;
  font-weight:700;
  letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.brand-text strong{
  font-family:var(--serif);
  font-size:19px;
  letter-spacing:.005em;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.brand-text em{
  font-style:normal;
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--muted);
  margin-top:3px;
}
.header-actions{display:flex;align-items:center;gap:12px;}
.btn-ink-sm{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:42px;
  padding:0 20px;
  border-radius:var(--r-btn);
  background:var(--ink);
  color:var(--paper);
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  white-space:nowrap;
  transition:background .22s var(--ease),transform .22s var(--ease);
}
.btn-ink-sm:hover{background:var(--cloud);color:#fff;transform:translateY(-1px);}
.header-nav{border-top:1px solid var(--line);}
.nav-scroll{
  display:flex;
  align-items:center;
  gap:8px;
  padding-top:10px;
  padding-bottom:10px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.nav-scroll::-webkit-scrollbar{display:none;}
.nav-chip{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:34px;
  padding:0 15px;
  border-radius:999px;
  border:1px solid var(--line);
  background:transparent;
  color:var(--muted);
  font-size:14px;
  letter-spacing:.03em;
  white-space:nowrap;
  transition:color .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease);
}
.nav-chip::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:4px;
  height:2px;
  background:var(--cloud);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease);
}
.nav-chip:hover{color:var(--cloud);border-color:#CBD6D1;}
.nav-chip:hover::after{transform:scaleX(1);}
.nav-chip.is-active{
  background:var(--ink);
  border-color:var(--ink);
  color:#fff;
}
.nav-chip.is-active::after{display:none;}

/* ============================================================
   5. 面包屑
   ============================================================ */
.crumb-bar{padding:22px 0 6px;}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--muted);
}
.crumb li{display:inline-flex;align-items:center;gap:8px;}
.crumb li+li::before{content:"/";color:#C3C8C3;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--cloud);}
.crumb .is-current{color:var(--ink);}

/* ============================================================
   6. Hero（分类页三：5/7 分栏）
   ============================================================ */
.hero{padding:28px 0 8px;}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  gap:48px;
  align-items:center;
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:28px;
  padding:0 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--paper-card);
  color:var(--cloud);
  font-size:12.5px;
  letter-spacing:.1em;
}
.hero-eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--clay);}
.hero h1{
  font-size:var(--fs-display);
  line-height:1.15;
  letter-spacing:-.01em;
  margin:18px 0 16px;
}
.hero-lede{
  font-size:17px;
  line-height:1.85;
  color:var(--ink-soft);
  max-width:33em;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.btn-main{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-btn);
  background:var(--ink);
  color:var(--paper);
  font-size:15px;
  font-weight:600;
  letter-spacing:.03em;
  border:1px solid var(--ink);
  transition:background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn-main .arw{transition:transform .22s var(--ease);}
.btn-main:hover{background:var(--cloud);border-color:var(--cloud);color:#fff;}
.btn-main:hover .arw{transform:translateX(4px);}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-btn);
  background:transparent;
  border:1px solid var(--ink);
  color:var(--ink);
  font-size:15px;
  font-weight:600;
  letter-spacing:.03em;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.btn-ghost:hover{color:var(--cloud);border-color:var(--cloud);}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0;
  margin-top:30px;
  padding-top:18px;
  border-top:1px solid var(--line);
}
.hero-meta span{
  font-size:13px;
  letter-spacing:.06em;
  color:var(--muted);
  padding:0 16px;
  border-left:1px solid var(--line);
  line-height:1.6;
}
.hero-meta span:first-child{padding-left:0;border-left:0;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;
  height:clamp(300px,40vw,430px);
  object-fit:cover;
  border-radius:var(--r-img);
  background:var(--paper);
  border:1px solid var(--line);
}
.hero-float{
  position:absolute;
  left:18px;
  bottom:18px;
  width:min(258px,78%);
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--r-img);
  box-shadow:var(--shadow-1);
  padding:14px 16px;
}
.hero-float .hf-title{
  font-size:12px;
  letter-spacing:.12em;
  color:var(--muted);
  margin-bottom:8px;
}
.hero-float .hf-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  font-size:13.5px;
  color:var(--ink);
  padding:5px 0;
  border-top:1px solid var(--line);
}
.hero-float .hf-row:first-of-type{border-top:0;padding-top:0;}
.hero-float .hf-row em{font-style:normal;color:var(--cloud);font-size:12.5px;letter-spacing:.06em;}

/* ============================================================
   7. 板块通用
   ============================================================ */
.section{padding:88px 0 0;}
.section-head{max-width:720px;margin-bottom:34px;}
.eyebrow{
  display:inline-block;
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--cloud);
  margin-bottom:12px;
}
.section-head h2{
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.3;
  letter-spacing:-.005em;
}
.section-sub{
  margin-top:12px;
  font-size:16px;
  color:var(--muted);
  line-height:1.85;
  max-width:36em;
}
.hairline{height:1px;background:var(--line);border:0;margin:0;}

/* ============================================================
   8. 统计块
   ============================================================ */
.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-bottom:40px;}
.stat{
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px 24px;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.stat:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.stat b{
  display:block;
  font-family:var(--serif);
  font-size:34px;
  line-height:1.2;
  color:var(--ink);
  letter-spacing:-.01em;
}
.stat b i{font-style:normal;font-size:15px;color:var(--cloud);margin-left:4px;letter-spacing:.04em;}
.stat span{display:block;margin-top:6px;font-size:13.5px;color:var(--muted);}

/* ============================================================
   9. 时间轴步骤流
   ============================================================ */
.step-flow{position:relative;max-width:940px;}
.step-item{
  position:relative;
  display:grid;
  grid-template-columns:56px minmax(0,1fr);
  gap:24px;
  padding-bottom:40px;
}
.step-item::before{
  content:"";
  position:absolute;
  left:27px;
  top:60px;
  bottom:0;
  width:1px;
  background:var(--line);
}
.step-item:last-child{padding-bottom:0;}
.step-item:last-child::before{display:none;}
.step-dot{
  position:relative;
  z-index:1;
  width:56px;
  height:56px;
  border-radius:50%;
  background:var(--paper-card);
  border:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:var(--serif);
  font-size:19px;
  color:var(--cloud);
  transition:border-color .24s var(--ease),color .24s var(--ease),box-shadow .24s var(--ease);
}
.step-item:hover .step-dot{border-color:var(--cloud);color:var(--clay);box-shadow:var(--shadow-1);}
.step-body h3{font-size:20px;line-height:1.4;margin-bottom:8px;}
.step-body p{font-size:15.5px;line-height:1.9;color:var(--ink-soft);max-width:42em;}
.step-points{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.step-points li{
  font-size:13px;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:999px;
  padding:4px 12px;
  background:var(--paper-card);
}

/* ============================================================
   10. 双端对比卡
   ============================================================ */
.compare-wrap{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:24px;align-items:start;}
.compare-card{
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.compare-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.compare-card + .compare-card{margin-top:24px;}
.compare-inner{display:grid;grid-template-columns:180px minmax(0,1fr);align-items:stretch;}
.compare-inner img{width:100%;height:100%;min-height:170px;object-fit:cover;border-radius:0;background:var(--paper);}
.compare-text{padding:24px;}
.compare-tag{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  background:rgba(47,111,104,.1);
  color:var(--cloud);
  font-size:12.5px;
  letter-spacing:.06em;
  margin-bottom:10px;
}
.compare-text h3{font-size:18px;line-height:1.45;margin-bottom:8px;}
.compare-text p{font-size:14.5px;line-height:1.9;color:var(--muted);}
.note-aside{
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 24px;
  position:sticky;
  top:112px;
}
.note-aside h3{font-size:17px;margin-bottom:12px;}
.note-aside p{font-size:14px;line-height:1.9;color:var(--muted);}
.note-aside p + p{margin-top:12px;}
.note-aside .note-quote{
  margin-top:16px;
  padding-left:14px;
  border-left:3px solid var(--cloud);
  font-size:14px;
  color:var(--ink-soft);
  background:var(--paper);
  padding:12px 14px;
  border-radius:0 10px 10px 0;
}

/* ============================================================
   11. 行式速查列表
   ============================================================ */
.quick-list{border-top:1px solid var(--line);max-width:980px;}
.quick-item{
  display:grid;
  grid-template-columns:56px minmax(0,1fr) auto;
  gap:20px;
  align-items:center;
  padding:22px 12px;
  border-bottom:1px solid var(--line);
  transition:background .22s var(--ease);
}
.quick-item:hover{background:var(--paper-card);}
.quick-idx{
  font-family:var(--serif);
  font-size:24px;
  color:var(--ink);
  line-height:1;
  transition:color .22s var(--ease);
}
.quick-item:hover .quick-idx{color:var(--clay);}
.quick-item h3{font-size:17px;line-height:1.4;margin-bottom:4px;}
.quick-item p{font-size:14px;line-height:1.8;color:var(--muted);}
.quick-tag{
  font-size:12.5px;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:999px;
  padding:4px 12px;
  white-space:nowrap;
  background:var(--paper-card);
}

/* ============================================================
   12. 相关分类窄卡
   ============================================================ */
.rel-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rel-card{
  display:flex;
  flex-direction:column;
  background:var(--paper-card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  color:var(--ink);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);color:var(--ink);border-color:#D3D8D2;}
.rel-card .thumb{overflow:hidden;aspect-ratio:16/10;background:var(--paper);}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.rel-card:hover .thumb img{transform:scale(1.03);}
.rel-body{padding:20px;display:flex;flex-direction:column;gap:8px;flex:1;}
.rel-body h3{font-size:18px;line-height:1.4;transition:color .22s var(--ease);}
.rel-card:hover .rel-body h3{color:var(--cloud);}
.rel-body p{font-size:14px;line-height:1.85;color:var(--muted);flex:1;}
.rel-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:var(--muted);
  letter-spacing:.06em;
  padding-top:6px;
}
.rel-foot .arw{transition:transform .22s var(--ease);color:var(--cloud);}
.rel-card:hover .rel-foot .arw{transform:translateX(4px);}
.rel-flag{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  background:rgba(200,96,60,.1);
  color:var(--clay);
  font-size:12px;
  letter-spacing:.06em;
}

/* ============================================================
   13. FAQ
   ============================================================ */
.faq-list{max-width:960px;}
.faq-item{border-top:1px solid var(--line);}
.faq-item:last-child{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  transition:color .22s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--cloud);}
.faq-plus{
  position:relative;
  flex:0 0 20px;
  width:20px;
  height:20px;
  transition:transform .24s var(--ease);
}
.faq-plus::before,
.faq-plus::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  background:var(--cloud);
  border-radius:2px;
}
.faq-plus::before{width:13px;height:1.6px;transform:translate(-50%,-50%);}
.faq-plus::after{width:1.6px;height:13px;transform:translate(-50%,-50%);}
.faq-item[open] .faq-plus{transform:rotate(45deg);}
.faq-answer{
  padding:0 34px 22px 0;
  font-size:15px;
  line-height:1.9;
  color:var(--ink-soft);
}
.faq-answer p{max-width:56em;}

/* ============================================================
   14. 收藏 / 分享 CTA 条
   ============================================================ */
.cta-band{
  margin-top:88px;
  background:var(--ink);
  color:var(--paper);
  padding:56px 0;
}
.cta-band .cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  flex-wrap:wrap;
}
.cta-band h2{
  color:var(--paper);
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.35;
}
.cta-band p{
  margin-top:10px;
  font-size:15px;
  color:rgba(247,246,242,.72);
  max-width:40em;
  line-height:1.85;
}
.cta-actions{display:flex;align-items:center;gap:12px;}
.round-btn{
  width:48px;
  height:48px;
  border-radius:50%;
  border:1px solid rgba(247,246,242,.28);
  background:transparent;
  color:var(--paper);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  transition:background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.round-btn:hover{background:var(--cloud);border-color:var(--cloud);color:#fff;transform:translateY(-2px);}
.round-btn svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.round-btn.is-saved{
  border-color:var(--clay);
  color:var(--clay);
}
.round-btn.is-saved svg{fill:var(--clay);stroke:var(--clay);}

/* ============================================================
   15. 页脚
   ============================================================ */
.site-footer{
  background:var(--ink);
  color:var(--paper);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-logo{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:16px;
}
.footer-logo .brand-mark{background:rgba(247,246,242,.12);color:var(--paper);}
.footer-logo strong{font-family:var(--serif);font-size:18px;color:var(--paper);letter-spacing:.01em;}
.footer-brand p{font-size:14px;line-height:1.9;color:rgba(247,246,242,.66);max-width:26em;}
.footer-title{
  font-size:13px;
  letter-spacing:.08em;
  color:rgba(247,246,242,.55);
  margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{
  position:relative;
  display:inline-block;
  font-size:14px;
  color:rgba(247,246,242,.66);
  width:fit-content;
  transition:color .22s var(--ease);
}
.footer-links a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:1px;
  background:var(--paper);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease);
}
.footer-links a:hover{color:#fff;}
.footer-links a:hover::after{transform:scaleX(1);}
.footer-note{
  font-size:13.5px;
  line-height:1.9;
  color:rgba(247,246,242,.66);
}
.footer-note strong{color:rgba(247,246,242,.9);font-weight:600;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:20px 0 24px;
  border-top:1px solid rgba(247,246,242,.16);
  font-size:13px;
  letter-spacing:.05em;
  color:rgba(247,246,242,.5);
}

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

/* ============================================================
   17. 响应式断点
   ============================================================ */
@media (max-width:1199.98px){
  .hero-grid{gap:36px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:991.98px){
  .hero{padding:20px 0 0;}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .hero-visual{order:-1;}
  .hero-visual img{height:clamp(240px,52vw,340px);}
  .hero-float{left:14px;bottom:14px;width:min(240px,82%);padding:12px 14px;}
  .hero-float .hf-row.hf-third{display:none;}
  .section{padding:64px 0 0;}
  .compare-wrap{grid-template-columns:minmax(0,1fr);}
  .note-aside{position:static;}
  .stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;}
  .compare-inner{grid-template-columns:150px minmax(0,1fr);}
  .rel-cards{grid-template-columns:minmax(0,1fr);}
  .cta-band{margin-top:64px;padding:44px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767.98px){
  .container-x{padding-left:18px;padding-right:18px;}
  .header-top-inner{padding-top:12px;padding-bottom:10px;}
  .brand-text strong{font-size:16.5px;}
  .brand-text em{font-size:10.5px;letter-spacing:.1em;}
  .brand-mark{width:36px;height:36px;flex:0 0 36px;font-size:17px;border-radius:10px;}
  .btn-ink-sm{height:38px;padding:0 14px;font-size:13px;}
  .hero h1{font-size:clamp(30px,7.4vw,40px);}
  .hero-lede{font-size:16px;}
  .hero-meta span{padding:0 12px;font-size:12.5px;}
  .stats{grid-template-columns:minmax(0,1fr);}
  .stat{padding:18px 20px;}
  .quick-item{grid-template-columns:44px minmax(0,1fr);row-gap:8px;padding:18px 8px;}
  .quick-tag{grid-column:2;justify-self:start;}
  .quick-idx{font-size:20px;}
  .compare-inner{grid-template-columns:minmax(0,1fr);}
  .compare-inner img{min-height:150px;max-height:190px;}
  .compare-text{padding:20px;}
  .step-item{grid-template-columns:44px minmax(0,1fr);gap:16px;padding-bottom:32px;}
  .step-dot{width:44px;height:44px;font-size:16px;}
  .step-item::before{left:21.5px;top:48px;}
  .step-body h3{font-size:18px;}
  .cta-band .cta-inner{gap:24px;}
  .cta-actions{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:575.98px){
  .section{padding:52px 0 0;}
  .section-head{margin-bottom:26px;}
  .hero-cta{flex-direction:column;align-items:stretch;}
  .btn-main,.btn-ghost{width:100%;justify-content:center;}
  .hero-meta{gap:0;margin-top:22px;}
  .hero-meta span{padding:0 10px 0 0;border-left:0;width:100%;line-height:2;}
  .quick-item h3{font-size:16px;}
  .faq-item summary{font-size:15px;padding:18px 0;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .cta-band{padding:40px 0;}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  .rel-card:hover .thumb img{transform:none;}
  .step-item:hover .step-dot,
  .stat:hover,
  .compare-card:hover,
  .rel-card:hover,
  .round-btn:hover,
  .btn-ink-sm:hover{transform:none;}
}