/* roulang page: index */
:root{
  --brand:#E8502A;
  --brand-600:#C93E1C;
  --brand-100:#FDEDE6;
  --accent:#C8F04A;
  --ink:#14110E;
  --ink-2:#3D3833;
  --muted:#7A736A;
  --paper:#FAF8F5;
  --surface:#FFFFFF;
  --line:#E6E0D8;
  --ok:#2E7D5B;
  --warn:#B7791F;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:24px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(20,17,14,.04),0 12px 32px -18px rgba(20,17,14,.18);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --fs-h1:clamp(2rem,5.2vw,3.6rem);
  --fs-h2:clamp(1.6rem,3.2vw,2.4rem);
  --fs-h3:1.25rem;
  --fs-body:1.0625rem;
  --fs-sm:.875rem;
  --fs-xs:.8125rem;
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--paper);
  background-image:repeating-linear-gradient(180deg,rgba(20,17,14,.018) 0 1px,transparent 1px 5px);
  color:var(--ink-2);
  font-family:var(--font-sans);
  font-size:var(--fs-body);
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.22;font-weight:800;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
input,button,textarea{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1441px){.container{max-width:1280px;}}

section[id]{scroll-margin-top:132px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-pill);
  font-size:.9375rem;font-weight:700;line-height:1.2;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;border-color:var(--brand);}
.btn-primary:hover{background:var(--brand-600);border-color:var(--brand-600);transform:translateY(-1px);box-shadow:0 10px 24px -12px rgba(232,80,42,.7);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-sm{padding:9px 18px;font-size:.875rem;}
.btn-block{width:100%;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(250,248,245,.96);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(250,248,245,.86);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-1);
}
.header-main{display:flex;align-items:center;gap:22px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--ink);
  display:grid;place-items:center;flex-shrink:0;
}
.brand-mark svg{width:18px;height:18px;display:block;}
.brand-text{font-weight:800;font-size:1.0625rem;color:var(--ink);letter-spacing:-.01em;}
.brand-text em{font-style:normal;color:var(--brand);}
.brand--light .brand-mark{background:var(--brand);}
.brand--light .brand-text{color:#fff;}
.brand--light .brand-text em{color:var(--accent);}

.nav-search{
  flex:1 1 auto;max-width:520px;position:relative;
  display:flex;align-items:center;gap:10px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-pill);padding:0 14px;height:44px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100);}
.nav-search i{color:var(--muted);font-size:.9rem;}
.nav-search input{
  flex:1;min-width:0;border:0;background:transparent;height:100%;
  font-size:.9375rem;color:var(--ink);outline:none;
}
.nav-search input::placeholder{color:var(--muted);}
.nav-search kbd{
  font-family:inherit;font-size:.6875rem;color:var(--muted);
  border:1px solid var(--line);border-radius:6px;padding:2px 7px;background:var(--paper);
}

.nav-links{display:flex;align-items:center;gap:6px;flex-shrink:0;margin-left:auto;}
.nav-link{
  padding:8px 13px;border-radius:var(--r-pill);
  font-size:.9375rem;font-weight:500;color:var(--ink-2);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-link:hover{background:var(--brand-100);color:var(--brand);}
.nav-link.is-active{color:var(--brand);font-weight:700;background:var(--brand-100);}
.nav-links .btn{margin-left:6px;}

.search-toggle{
  display:none;width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
  align-items:center;justify-content:center;flex-shrink:0;
}
.search-toggle:hover{border-color:var(--brand);color:var(--brand);}

.header-sub{border-top:1px solid var(--line);background:rgba(255,255,255,.55);}
.chips-row{display:flex;align-items:center;gap:8px;height:46px;overflow-x:auto;scrollbar-width:none;}
.chips-row::-webkit-scrollbar{display:none;}
.chips-nav{display:none;align-items:center;gap:8px;}
.chips-sep{display:none;width:1px;height:18px;background:var(--line);flex-shrink:0;margin:0 4px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;white-space:nowrap;
  padding:5px 13px;border-radius:var(--r-pill);
  font-size:.8125rem;border:1px solid var(--line);
  background:var(--surface);color:var(--ink-2);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-100);}
.chip--brand{background:var(--brand-100);border-color:transparent;color:var(--brand);font-weight:700;}
.chip--nav.is-active{border-color:var(--brand);color:var(--brand);font-weight:700;background:var(--brand-100);}

/* ---------- 移动端搜索层 ---------- */
.search-overlay{
  position:fixed;inset:0;z-index:90;display:none;
  background:rgba(250,248,245,.98);padding:76px 20px 24px;
}
.search-overlay.is-open{display:block;}
.search-overlay__field{
  display:flex;align-items:center;gap:12px;
  background:var(--surface);border:1px solid var(--brand);
  border-radius:var(--r-pill);height:52px;padding:0 18px;
  box-shadow:0 0 0 3px var(--brand-100);
}
.search-overlay__field input{flex:1;border:0;background:transparent;outline:none;font-size:1rem;color:var(--ink);}
.search-overlay__hint{margin-top:22px;font-size:.8125rem;color:var(--muted);}
.search-overlay__hint a{color:var(--brand);margin-right:14px;line-height:2.2;display:inline-block;}
.search-overlay__close{
  margin-top:26px;width:100%;height:46px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--surface);color:var(--ink-2);font-weight:700;
}
.search-overlay__close:hover{border-color:var(--brand);color:var(--brand);}

/* ---------- Hero ---------- */
.hero{padding:clamp(44px,6vw,88px) 0 clamp(52px,7vw,104px);position:relative;overflow:hidden;}
.hero::after{
  content:"";position:absolute;right:-140px;top:-100px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(232,80,42,.10),transparent 68%);pointer-events:none;
}
.hero-grid{
  display:grid;grid-template-columns:7fr 5fr;gap:clamp(28px,4vw,56px);
  align-items:center;position:relative;z-index:1;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.8125rem;font-weight:700;color:var(--brand);letter-spacing:.05em;
}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);}
.hero h1{font-size:var(--fs-h1);font-weight:900;letter-spacing:-.02em;line-height:1.1;margin-top:18px;}
.hero-sub{max-width:34em;margin-top:18px;font-size:1.0625rem;line-height:1.85;color:var(--ink-2);}
.hero-actions{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.hero-badges li{
  font-size:.8125rem;color:var(--muted);background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-pill);padding:5px 14px;
}
.hero-visual{
  position:relative;border-radius:var(--r-lg);border:1px solid var(--line);
  overflow:hidden;background:var(--surface);aspect-ratio:5/4;
}
.hero-visual img{width:100%;height:100%;object-fit:cover;}

/* ---------- 通用板块 ---------- */
.section{padding:clamp(60px,8vw,112px) 0;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:clamp(28px,4vw,52px);
}
.section-tag{
  display:inline-block;font-size:.75rem;font-weight:800;letter-spacing:.16em;
  color:var(--brand);margin-bottom:10px;
}
.section-head h2{font-size:var(--fs-h2);}
.section-head p{margin-top:12px;max-width:54ch;color:var(--muted);font-size:.9375rem;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:.875rem;font-weight:700;color:var(--brand);}
.text-link i,.text-link span{transition:transform .2s var(--ease);}
.text-link:hover i,.text-link:hover span{transform:translateX(3px);}

/* ---------- 卖点 ---------- */
.feature-list{border-top:1px solid var(--line);}
.feature-row{
  display:grid;grid-template-columns:140px 1fr;gap:32px;
  padding:36px 0;border-bottom:1px solid var(--line);align-items:start;
}
.feature-num{
  font-size:clamp(2.2rem,3.8vw,3.2rem);font-weight:900;line-height:1;
  letter-spacing:-.03em;color:rgba(232,80,42,.3);
}
@supports (-webkit-text-stroke:1px red){
  .feature-num{color:transparent;-webkit-text-stroke:1.5px rgba(232,80,42,.6);}
}
.feature-body h3{font-size:var(--fs-h3);margin-bottom:10px;}
.feature-body p{color:var(--ink-2);max-width:62ch;}
.feature-split{
  display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px);
  align-items:center;padding:44px 0;border-bottom:1px solid var(--line);
}
.feature-split__text h3{font-size:var(--fs-h3);margin-bottom:12px;}
.feature-split__text p{color:var(--ink-2);max-width:52ch;}
.feature-split__media{
  border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);
  aspect-ratio:8/5;background:var(--surface);
}
.feature-split__media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.feature-split__media:hover img{transform:scale(1.03);}
.feature-split.reverse .feature-split__text{order:2;}
.feature-split.reverse .feature-split__media{order:1;}
.mini-list{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.mini-list li{position:relative;padding-left:18px;font-size:.9375rem;color:var(--muted);}
.mini-list li::before{
  content:"";position:absolute;left:0;top:.66em;width:7px;height:7px;
  border-radius:2px;background:var(--brand);
}

/* ---------- 演示 ---------- */
.demo-shell{border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);overflow:hidden;}
.demo-stage{position:relative;aspect-ratio:16/9;background:var(--ink);}
.demo-stage img{width:100%;height:100%;object-fit:cover;transition:opacity .3s var(--ease);}
.demo-steps{
  display:flex;gap:10px;padding:20px 22px;overflow-x:auto;
  scrollbar-width:none;border-top:1px solid var(--line);
}
.demo-steps::-webkit-scrollbar{display:none;}
.demo-step{
  white-space:nowrap;padding:9px 18px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--surface);
  font-size:.875rem;color:var(--ink-2);
  transition:all .2s var(--ease);
}
.demo-step:hover{border-color:var(--brand);color:var(--brand);}
.demo-step.is-active{border-color:var(--brand);color:var(--brand);font-weight:700;background:var(--brand-100);}

/* ---------- 证据 ---------- */
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:clamp(30px,4vw,48px) 0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat-num{
  font-size:clamp(2.1rem,4.4vw,3.2rem);font-weight:900;line-height:1;
  color:var(--ink);letter-spacing:-.03em;display:flex;align-items:baseline;
}
.stat-num b{font-weight:900;}
.stat-num span{font-size:.32em;font-weight:700;color:var(--muted);margin-left:8px;letter-spacing:0;}
.stat-label{margin-top:12px;font-size:var(--fs-sm);color:var(--muted);}
.quotes-track{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:clamp(32px,4vw,52px);}
.quote{border-left:3px solid var(--brand);padding-left:20px;}
.quote p{color:var(--ink-2);line-height:1.85;}
.quote cite{display:block;margin-top:12px;font-size:var(--fs-xs);color:var(--muted);font-style:normal;}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  display:flex;flex-direction:column;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.news-card:hover{border-color:var(--brand-100);transform:translateY(-3px);}
.news-card__cover{display:block;aspect-ratio:16/10;overflow:hidden;background:var(--brand-100);}
.news-card__cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease);}
.news-card:hover .news-card__cover img{transform:scale(1.04);}
.news-card__body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-card__meta{display:flex;align-items:center;gap:10px;font-size:var(--fs-xs);color:var(--muted);}
.news-card__title{font-size:1.0625rem;font-weight:800;line-height:1.45;}
.news-card__title a:hover{color:var(--brand);}
.news-card__desc{
  font-size:var(--fs-sm);color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card .text-link{margin-top:auto;}
.news-empty{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;min-height:190px;padding:28px;text-align:center;
  border:1px dashed var(--line);border-radius:var(--r-md);
  background:rgba(255,255,255,.6);color:var(--muted);
}

/* ---------- 价格 ---------- */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.price-card{
  position:relative;display:flex;flex-direction:column;gap:18px;
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);padding:30px 24px;
}
.price-card--featured{border-width:2px;border-color:var(--brand);box-shadow:var(--shadow-1);}
.price-card--featured::before{
  content:"推荐";position:absolute;top:-12px;left:24px;
  background:var(--brand);color:#fff;font-size:.75rem;font-weight:700;
  padding:3px 12px;border-radius:var(--r-pill);
}
.price-name{font-size:1.0625rem;font-weight:800;color:var(--ink);}
.price-value{display:flex;align-items:baseline;gap:6px;color:var(--ink);}
.price-value b{font-size:2.4rem;font-weight:900;letter-spacing:-.03em;line-height:1;}
.price-value em{font-style:normal;font-size:.875rem;color:var(--muted);}
.price-desc{font-size:var(--fs-sm);color:var(--muted);line-height:1.7;}
.price-list{display:flex;flex-direction:column;gap:10px;font-size:.9375rem;}
.price-list li{display:flex;gap:10px;align-items:flex-start;color:var(--ink-2);}
.price-list li::before{font-weight:800;flex-shrink:0;line-height:1.75;}
.price-list li.yes::before{content:"✓";color:var(--ok);}
.price-list li.no::before{content:"×";color:var(--muted);}
.price-list li.no{color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 0;background:none;border:0;text-align:left;
  font-size:1.0625rem;font-weight:700;color:var(--ink);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand);}
.faq-icon{
  position:relative;width:18px;height:18px;flex-shrink:0;color:var(--muted);
  transition:transform .24s var(--ease),color .24s var(--ease);
}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:currentColor;border-radius:2px;}
.faq-icon::before{left:0;top:8px;width:18px;height:2px;}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--brand);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease);}
.faq-a p{padding-bottom:24px;max-width:68ch;color:var(--ink-2);font-size:.9375rem;line-height:1.85;}

/* ---------- CTA ---------- */
.cta-strip{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  background:var(--ink);color:#fff;border-radius:var(--r-lg);
  padding:clamp(30px,4vw,52px);
}
.cta-strip h2{color:#fff;font-size:clamp(1.35rem,2.4vw,1.9rem);}
.cta-strip p{color:rgba(250,248,245,.72);margin-top:10px;max-width:48ch;font-size:.9375rem;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(250,248,245,.72);margin-top:clamp(60px,8vw,110px);}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px;
  padding:clamp(44px,6vw,72px) 0;
  border-top:1px solid rgba(250,248,245,.12);
}
.site-footer h3{color:#fff;font-size:.9375rem;font-weight:700;margin-bottom:16px;letter-spacing:0;}
.site-footer a{color:rgba(250,248,245,.68);font-size:.9375rem;}
.site-footer a:hover{color:var(--brand);}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-brand p{margin-top:16px;font-size:.875rem;line-height:1.85;max-width:34ch;color:rgba(250,248,245,.62);}
.subscribe{display:flex;gap:8px;margin-top:20px;}
.subscribe input{
  flex:1;min-width:0;height:42px;border-radius:var(--r-pill);
  border:1px solid rgba(250,248,245,.2);background:rgba(255,255,255,.06);
  color:#fff;padding:0 16px;font-size:.875rem;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.subscribe input::placeholder{color:rgba(250,248,245,.4);}
.subscribe input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(232,80,42,.25);}
.form-note{margin-top:10px;font-size:var(--fs-xs);color:var(--accent);min-height:1.2em;}
.footer-bottom{border-top:1px solid rgba(250,248,245,.12);padding:22px 0;}
.footer-bottom__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:var(--fs-xs);color:rgba(250,248,245,.5);
}
.footer-bottom__inner ul{display:flex;gap:18px;flex-wrap:wrap;}

/* ---------- 浮动操作 ---------- */
.fab-stack{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease);
}
.fab-stack.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.fab-top{
  width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
  display:grid;place-items:center;
  transition:border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.fab-top:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.fab-top[hidden]{display:none;}
.fab-cta{
  background:var(--brand);color:#fff;padding:12px 22px;
  border-radius:var(--r-pill);font-weight:700;font-size:.9375rem;
  box-shadow:var(--shadow-1);
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.fab-cta:hover{background:var(--brand-600);transform:translateY(-2px);}

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

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;}
  .hero-visual{aspect-ratio:16/9;}
  .feature-split{grid-template-columns:1fr;}
  .feature-split.reverse .feature-split__text{order:1;}
  .feature-split.reverse .feature-split__media{order:2;}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .pricing-grid{grid-template-columns:1fr;max-width:620px;margin:0 auto;}
  .price-card--featured{order:-1;}
  .quotes-track{grid-template-columns:1fr;gap:24px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:900px){
  .nav-search{display:none;}
  .nav-links .nav-link{display:none;}
  .search-toggle{display:inline-flex;margin-left:auto;}
  .nav-links{margin-left:0;}
  .chips-nav{display:flex;}
  .chips-sep{display:block;}
  .header-main{height:64px;gap:14px;}
  section[id]{scroll-margin-top:120px;}
}
@media (max-width:640px){
  .container{padding:0 18px;}
  .brand-text{font-size:1rem;}
  .hero{padding-top:32px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .feature-row{grid-template-columns:1fr;gap:14px;padding:28px 0;}
  .stats-grid{grid-template-columns:1fr 1fr;gap:22px;}
  .news-grid{grid-template-columns:1fr;}
  .news-card__cover{aspect-ratio:16/9;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-strip{flex-direction:column;align-items:flex-start;}
  .cta-strip .btn{width:100%;}
  .fab-stack{right:16px;bottom:calc(16px + env(safe-area-inset-bottom));}
  .fab-cta{padding:10px 18px;font-size:.875rem;}
  .fab-top{width:40px;height:40px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
}

/* roulang page: category1 */
:root{
  --brand:#E8502A;
  --brand-600:#C93E1C;
  --brand-100:#FDEDE6;
  --accent:#C8F04A;
  --ink:#14110E;
  --ink-2:#3D3833;
  --muted:#7A736A;
  --paper:#FAF8F5;
  --surface:#FFFFFF;
  --line:#E6E0D8;
  --ok:#2E7D5B;
  --warn:#B7791F;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:24px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(20,17,14,.04),0 12px 32px -18px rgba(20,17,14,.18);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --fs-h1:clamp(2.1rem,4.6vw,3.3rem);
  --fs-h2:clamp(1.5rem,2.6vw,2rem);
  --fs-h3:1.25rem;
  --fs-body:1.0625rem;
  --fs-sm:.875rem;
  --fs-xs:.8125rem;
  --header-h:113px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:var(--fs-body);
  line-height:1.75;
  color:var(--ink-2);
  background-color:var(--paper);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-family:var(--font-sans);line-height:1.25;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;background-color:transparent;}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
input{font:inherit;}
figure{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

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

/* ============ header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(250,248,245,.86);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  box-shadow:0 10px 30px -24px rgba(20,17,14,.35);
}
.header-main{
  display:flex;
  align-items:center;
  gap:18px;
  min-height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  color:var(--ink);
  letter-spacing:-.01em;
  flex:0 0 auto;
}
.brand-mark{
  width:34px;height:34px;
  border-radius:10px;
  background:var(--ink);
  display:grid;place-items:center;
  flex:0 0 auto;
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{font-size:1.0625rem;white-space:nowrap;}
.brand-text em{font-style:normal;color:var(--brand);margin-left:2px;}
.brand--light{color:#FAF8F5;}
.brand--light .brand-mark{background:rgba(250,248,245,.12);}

.nav-search{
  display:flex;
  align-items:center;
  gap:10px;
  flex:1 1 auto;
  max-width:520px;
  min-width:200px;
  margin-left:8px;
  padding:8px 14px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-search i{color:var(--muted);font-size:.875rem;}
.nav-search input{
  flex:1 1 auto;
  min-width:0;
  border:0;
  outline:0;
  background:transparent;
  font-size:.9375rem;
  color:var(--ink);
}
.nav-search input::placeholder{color:var(--muted);}
.nav-search kbd{
  font-family:var(--font-sans);
  font-size:.6875rem;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:6px;
  padding:1px 6px;
  background:var(--paper);
  flex:0 0 auto;
}
.nav-search:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 3px var(--brand-100);
}

.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;flex:0 0 auto;}
.nav-link{
  position:relative;
  padding:8px 12px;
  border-radius:var(--r-sm);
  font-size:.9375rem;
  color:var(--ink-2);
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link:hover{color:var(--brand);background:var(--brand-100);}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;border-radius:2px;
  background:var(--brand);
}
.search-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:50%;
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink);
  align-items:center;justify-content:center;
  margin-left:auto;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.search-toggle:hover{border-color:var(--brand);color:var(--brand);}

.header-sub{border-top:1px solid var(--line);}
.chips-row{
  display:flex;
  align-items:center;
  gap:8px;
  padding-top:9px;
  padding-bottom:9px;
  overflow-x:auto;
  scrollbar-width:none;
}
.chips-row::-webkit-scrollbar{display:none;}
.chips-nav{display:flex;align-items:center;gap:8px;}
.chips-sep{width:1px;height:18px;background:var(--line);flex:0 0 auto;margin:0 4px;}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  white-space:nowrap;
  padding:5px 13px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink-2);
  font-size:var(--fs-xs);
  transition:all .2s var(--ease);
}
.chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-100);}
.chip.is-active{background:var(--brand-100);border-color:var(--brand);color:var(--brand);font-weight:600;}
.chip--nav{font-size:.8125rem;}

/* ============ buttons ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 24px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:.9375rem;
  font-weight:600;
  text-align:center;
  cursor:pointer;
  transition:all .2s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-light{background:#FAF8F5;color:var(--ink);}
.btn-light:hover{background:#fff;transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-sm{padding:8px 17px;font-size:var(--fs-sm);}
.btn-lg{padding:14px 32px;font-size:1rem;}

/* ============ page hero ============ */
.page-hero{
  position:relative;
  padding:clamp(36px,5vw,64px) 0 clamp(30px,4vw,50px);
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(rgba(20,17,14,.028) 1px,transparent 1px);
  background-size:100% 30px;
}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:var(--fs-sm);
  color:var(--muted);
  margin-bottom:22px;
}
.breadcrumb a{transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#CFC7BC;}
.breadcrumb .current{color:var(--ink-2);}

.hero-kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:var(--fs-xs);
  font-weight:600;
  letter-spacing:.08em;
  color:var(--brand);
  background:var(--brand-100);
  border-radius:var(--r-pill);
  padding:5px 14px;
  margin-bottom:18px;
}
.page-hero h1{
  font-size:var(--fs-h1);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.12;
  max-width:22em;
}
.page-hero .lede{
  margin-top:16px;
  max-width:62ch;
  font-size:1.0625rem;
  color:var(--ink-2);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:6px 14px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  font-size:var(--fs-xs);
  color:var(--ink-2);
  background:var(--surface);
}
.tag i{color:var(--brand);font-size:.75rem;}

/* ============ layout ============ */
.page-body{padding:clamp(40px,6vw,72px) 0;}
.guide-layout{align-items:flex-start;}
.guide-aside{padding-right:32px;}
.guide-main{padding-left:32px;border-left:1px solid var(--line);}

.side-index{
  position:sticky;
  top:calc(var(--header-h) + 24px);
}
.side-index__title{
  font-size:var(--fs-xs);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
  font-weight:700;
  margin-bottom:14px;
}
.side-index ol{display:flex;flex-direction:column;gap:2px;}
.side-index a{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:10px 12px;
  border-left:3px solid transparent;
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:.9375rem;
  color:var(--ink-2);
  transition:all .2s var(--ease);
}
.side-index a span{font-size:var(--fs-xs);color:var(--muted);font-weight:700;}
.side-index a:hover{background:var(--brand-100);color:var(--brand);}
.side-index a.is-current{
  border-left-color:var(--brand);
  background:var(--brand-100);
  color:var(--brand);
  font-weight:600;
}
.side-index a.is-current span{color:var(--brand);}
.side-note{
  margin-top:22px;
  padding:16px 18px;
  border:1px dashed var(--line);
  border-radius:var(--r-md);
  font-size:var(--fs-sm);
  color:var(--muted);
  background:var(--surface);
}
.side-note strong{display:block;color:var(--ink);font-size:.9375rem;margin-bottom:6px;}

/* ============ guide blocks ============ */
.guide-block{
  padding-bottom:clamp(34px,4.4vw,52px);
  margin-bottom:clamp(34px,4.4vw,52px);
  border-bottom:1px solid var(--line);
  scroll-margin-top:calc(var(--header-h) + 24px);
}
.guide-block:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0;}
.block-head{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;}
.block-num{
  font-size:2.4rem;
  font-weight:900;
  line-height:1;
  color:var(--brand-100);
  -webkit-text-stroke:1.2px rgba(232,80,42,.6);
  letter-spacing:.02em;
  flex:0 0 auto;
}
.block-head h2{
  font-size:var(--fs-h2);
  font-weight:800;
  letter-spacing:-.01em;
}
.guide-block h3{
  font-size:1.0625rem;
  font-weight:700;
  margin-top:26px;
}
.guide-block p{margin-top:14px;max-width:72ch;color:var(--ink-2);}
.guide-block p strong{color:var(--ink);}

.dot-list{margin-top:16px;display:flex;flex-direction:column;gap:9px;max-width:72ch;}
.dot-list li{
  position:relative;
  padding-left:20px;
  font-size:.9375rem;
  color:var(--ink-2);
}
.dot-list li::before{
  content:"";
  position:absolute;
  left:2px;
  top:.66em;
  width:7px;height:7px;
  border-radius:2px;
  background:var(--brand);
}
.dot-list li b{color:var(--ink);}

.figure-8x5{
  position:relative;
  aspect-ratio:8/5;
  margin-top:24px;
  overflow:hidden;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--brand-100);
}
.figure-8x5 img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.figure-8x5:hover img{transform:scale(1.03);}
.figure-8x5 figcaption{
  position:absolute;
  left:14px;bottom:12px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  background:rgba(20,17,14,.72);
  color:#FAF8F5;
  font-size:var(--fs-xs);
}

/* ============ key points ============ */
.keypoints{
  margin:clamp(40px,5vw,64px) 0;
  border-top:1px solid var(--line);
}
.keypoint{
  display:flex;
  gap:26px;
  align-items:flex-start;
  padding:22px 0;
  border-bottom:1px solid var(--line);
}
.keypoint .kp-num{
  font-size:1.4rem;
  font-weight:900;
  color:var(--brand);
  min-width:2.2em;
  line-height:1.4;
}
.keypoint h3{font-size:1.0625rem;font-weight:700;}
.keypoint p{margin-top:6px;font-size:.9375rem;max-width:64ch;}

/* ============ compare table ============ */
.compare{margin-top:26px;overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);}
.compare table{width:100%;border-collapse:collapse;min-width:560px;}
.compare th,.compare td{
  padding:14px 18px;
  text-align:left;
  font-size:.9375rem;
  border-bottom:1px solid var(--line);
}
.compare thead th{
  background:var(--paper);
  color:var(--ink);
  font-weight:700;
  white-space:nowrap;
}
.compare tbody tr:last-child td{border-bottom:0;}
.compare td:first-child{color:var(--ink);font-weight:600;white-space:nowrap;}
.ok-text{color:var(--ok);font-weight:600;}
.warn-text{color:var(--warn);font-weight:600;}

/* ============ FAQ ============ */
.faq-section{padding:clamp(48px,7vw,92px) 0 0;scroll-margin-top:calc(var(--header-h) + 24px);}
.section-head{max-width:64ch;margin-bottom:clamp(26px,3.4vw,40px);}
.section-head .eyebrow{
  display:inline-block;
  font-size:var(--fs-xs);
  font-weight:700;
  letter-spacing:.14em;
  color:var(--brand);
  margin-bottom:12px;
}
.section-head h2{font-size:var(--fs-h2);font-weight:800;letter-spacing:-.01em;}
.section-head p{margin-top:14px;color:var(--ink-2);}

.accordion{border:0;background:transparent;margin:0;list-style:none;}
.accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent;}
.accordion-title{
  display:block;
  padding:22px 48px 22px 0;
  font-size:1.0625rem;
  font-weight:700;
  color:var(--ink);
  border:0;
  background:transparent;
  position:relative;
  line-height:1.5;
  transition:color .2s var(--ease);
}
.accordion-title:hover{color:var(--brand);background:transparent;}
.accordion-title::before{
  content:"+";
  position:absolute;
  right:10px;
  top:50%;
  transform:translateY(-50%);
  font-size:1.4rem;
  font-weight:400;
  color:var(--muted);
  transition:transform .24s var(--ease),color .24s var(--ease);
}
.accordion-item.is-active .accordion-title::before,
.is-active>.accordion-title::before{
  content:"+";
  transform:translateY(-50%) rotate(45deg);
  color:var(--brand);
}
.accordion-content{
  padding:0 0 24px;
  border:0;
  background:transparent;
  color:var(--ink-2);
  max-width:68ch;
}
.accordion-content p{font-size:.9375rem;}

/* ============ link cards ============ */
.link-cards{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
  margin-top:clamp(44px,6vw,72px);
}
.link-card{
  display:block;
  padding:26px;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--surface);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.link-card:hover{border-color:var(--brand);box-shadow:var(--shadow-1);transform:translateY(-2px);}
.link-card .lc-label{
  font-size:var(--fs-xs);
  font-weight:700;
  letter-spacing:.1em;
  color:var(--muted);
}
.link-card h3{
  font-size:1.25rem;
  font-weight:700;
  margin-top:10px;
  transition:color .2s var(--ease);
}
.link-card:hover h3{color:var(--brand);}
.link-card p{margin-top:10px;font-size:var(--fs-sm);color:var(--ink-2);}
.link-card .lc-go{
  display:inline-flex;
  align-items:center;
  gap:7px;
  margin-top:16px;
  font-size:var(--fs-sm);
  font-weight:600;
  color:var(--brand);
}
.link-card .lc-go i{transition:transform .2s var(--ease);}
.link-card:hover .lc-go i{transform:translateX(3px);}
.link-card.is-current{border-color:var(--brand-100);background:var(--brand-100);}
.link-card.is-current:hover{transform:none;}

/* ============ CTA band ============ */
.cta-band{
  margin-top:clamp(44px,6vw,72px);
  padding:clamp(30px,4.4vw,52px);
  border-radius:var(--r-lg);
  background:var(--ink);
  color:rgba(250,248,245,.78);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.cta-band h2{
  color:#FAF8F5;
  font-size:clamp(1.4rem,2.4vw,1.9rem);
  font-weight:800;
  letter-spacing:-.01em;
  max-width:22em;
}
.cta-band p{margin-top:10px;font-size:var(--fs-sm);max-width:44ch;}
.cta-band .cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ footer ============ */
.site-footer{
  margin-top:clamp(56px,8vw,110px);
  background:var(--ink);
  color:rgba(250,248,245,.7);
  border-top:1px solid rgba(250,248,245,.14);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:32px;
  padding-top:clamp(46px,6vw,72px);
  padding-bottom:clamp(40px,5vw,60px);
}
.footer-brand p{margin-top:14px;font-size:var(--fs-sm);max-width:34ch;}
.footer-col h3{color:#FAF8F5;font-size:1rem;font-weight:700;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:var(--fs-sm);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--brand);}
.subscribe{display:flex;gap:8px;margin-top:18px;flex-wrap:wrap;}
.subscribe input{
  flex:1 1 180px;
  min-width:0;
  padding:9px 16px;
  border-radius:var(--r-pill);
  border:1px solid rgba(250,248,245,.24);
  background:rgba(250,248,245,.06);
  color:#FAF8F5;
  font-size:var(--fs-sm);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.subscribe input::placeholder{color:rgba(250,248,245,.45);}
.subscribe input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(232,80,42,.25);}
.form-note{font-size:var(--fs-xs);color:var(--accent);min-height:1.2em;margin-top:8px;}
.footer-bottom{border-top:1px solid rgba(250,248,245,.12);padding:18px 0;}
.footer-bottom__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:var(--fs-xs);
}
.footer-bottom ul{display:flex;gap:18px;}
.footer-bottom a:hover{color:var(--brand);}

/* ============ floating ============ */
.float-cta{
  position:fixed;
  right:24px;
  bottom:calc(24px + env(safe-area-inset-bottom,0px));
  z-index:70;
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:12px;
  opacity:0;
  pointer-events:none;
  transform:translateY(12px);
  transition:opacity .26s var(--ease),transform .26s var(--ease);
}
.float-cta.is-visible{opacity:1;pointer-events:auto;transform:none;}
.to-top{
  width:42px;height:42px;
  border-radius:50%;
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink);
  display:grid;place-items:center;
  opacity:0;
  pointer-events:none;
  transition:all .22s var(--ease);
}
.to-top.is-visible{opacity:1;pointer-events:auto;}
.to-top:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}

/* ============ search overlay ============ */
.search-overlay{
  position:fixed;
  inset:0;
  z-index:90;
  background:rgba(20,17,14,.45);
  display:none;
  padding:20px;
}
.search-overlay.is-open{display:block;}
.search-overlay__inner{
  max-width:560px;
  margin:60px auto 0;
  background:var(--surface);
  border-radius:var(--r-lg);
  padding:20px;
  box-shadow:var(--shadow-1);
}
.search-overlay__bar{
  display:flex;
  align-items:center;
  gap:12px;
  padding:10px 16px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
}
.search-overlay__bar:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100);}
.search-overlay__bar i{color:var(--muted);}
.search-overlay__bar input{flex:1;border:0;outline:0;background:transparent;font-size:.9375rem;min-width:0;}
.search-close{color:var(--muted);padding:4px 6px;border-radius:var(--r-sm);}
.search-close:hover{color:var(--brand);}
.hot-words{margin-top:16px;font-size:var(--fs-sm);color:var(--muted);display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.hot-words a{
  padding:5px 12px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  color:var(--ink-2);
  font-size:var(--fs-xs);
  transition:all .2s var(--ease);
}
.hot-words a:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-100);}

/* ============ animations ============ */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ responsive ============ */
@media (max-width:1200px){
  .nav-link{padding:8px 10px;font-size:.9rem;}
  .nav-search{max-width:420px;}
}
@media (max-width:1024px){
  :root{--header-h:105px;}
  .nav-search{display:none;}
  .search-toggle{display:inline-flex;}
  .nav-link{display:none;}
  .nav-links .btn{display:inline-flex;}
  .nav-links{margin-left:0;}
  .guide-aside{padding-right:0;margin-bottom:36px;}
  .guide-main{padding-left:0;border-left:0;}
  .side-index{position:static;}
  .side-index ol{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:6px;
  }
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .brand-text{font-size:1rem;}
  .page-hero h1{max-width:none;}
  .cta-band{flex-direction:column;align-items:flex-start;}
  .cta-band .cta-actions{width:100%;}
  .cta-band .btn{flex:1 1 auto;}
  .keypoint{gap:16px;}
  .block-num{font-size:2rem;}
}
@media (max-width:640px){
  :root{--header-h:96px;}
  .hero-actions .btn{width:100%;}
  .link-cards{grid-template-columns:1fr;}
  .side-index ol{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:34px;}
  .footer-bottom__inner{flex-direction:column;align-items:flex-start;}
  .float-cta{right:14px;bottom:calc(14px + env(safe-area-inset-bottom,0px));}
  .float-cta .btn{padding:9px 16px;font-size:var(--fs-xs);}
  .to-top{width:38px;height:38px;}
  .compare{border-radius:var(--r-sm);}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}
html{scroll-behavior:smooth;}

/* roulang page: article */
:root{
  --brand:#E8502A;
  --brand-600:#C93E1C;
  --brand-100:#FDEDE6;
  --accent:#C8F04A;
  --ink:#14110E;
  --ink-2:#3D3833;
  --muted:#7A736A;
  --paper:#FAF8F5;
  --surface:#FFFFFF;
  --line:#E6E0D8;
  --ok:#2E7D5B;
  --warn:#B7791F;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --fs-h1:clamp(2.4rem,6vw,4.4rem);
  --fs-h2:clamp(1.8rem,3.4vw,2.6rem);
  --fs-h3:1.25rem;
  --fs-body:1.0625rem;
  --fs-sm:.875rem;
  --fs-xs:.8125rem;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:24px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(20,17,14,.04),0 12px 32px -18px rgba(20,17,14,.18);
  --container:1200px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --tr:220ms cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:var(--fs-body);
  line-height:1.75;
  color:var(--ink-2);
  background:var(--paper);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--ink);text-decoration:none;transition:color var(--tr),background-color var(--tr),border-color var(--tr),transform var(--tr);}
a:hover{color:var(--brand);}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.01em;font-weight:800;line-height:1.25;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
main{display:block;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-pill);
  font-weight:700;font-size:var(--fs-sm);line-height:1.2;
  border:1px solid transparent;white-space:nowrap;
  transition:background-color var(--tr),color var(--tr),border-color var(--tr),box-shadow var(--tr),transform var(--tr);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px -16px rgba(232,80,42,.9);}
.btn-primary:hover,.btn-primary:focus-visible{background:var(--brand-600);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-primary:active{transform:translateY(0);background:var(--brand-600);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover,.btn-ghost:focus-visible{border-color:var(--brand);color:var(--brand);background:var(--brand-100);}
.btn-sm{padding:9px 18px;font-size:var(--fs-xs);}

/* ---------- 徽章 / 标签 ---------- */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;border-radius:var(--r-pill);
  background:var(--surface);border:1px solid var(--line);
  font-size:var(--fs-xs);color:var(--muted);
  transition:all var(--tr);
}
.chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-100);}
.chip--nav{font-weight:600;color:var(--ink-2);}
.chip--nav.is-active{background:var(--brand-100);border-color:var(--brand-100);color:var(--brand);}
.chip--soft{background:var(--brand-100);border-color:transparent;color:var(--brand);font-weight:700;}
.chip--soft:hover{background:var(--brand-100);color:var(--brand-600);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(250,248,245,.96);
  border-bottom:1px solid transparent;
  transition:background-color var(--tr),border-color var(--tr),box-shadow var(--tr);
}
.site-header.is-scrolled{
  background:rgba(250,248,245,.86);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom-color:var(--line);
}
.header-main{display:flex;align-items:center;gap:20px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;background:var(--ink);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{font-weight:800;font-size:1.0625rem;color:var(--ink);letter-spacing:-.01em;line-height:1;}
.brand-text em{font-style:normal;color:var(--brand);font-weight:800;margin-left:2px;}
.brand--light .brand-text{color:var(--paper);}
.brand--light .brand-text em{color:var(--accent);}
.brand--light .brand-mark{background:rgba(255,255,255,.08);}

.nav-search{
  position:relative;flex:1 1 auto;max-width:520px;margin:0 auto;
  display:flex;align-items:center;
}
.nav-search i{
  position:absolute;left:18px;color:var(--muted);font-size:.9rem;pointer-events:none;
}
.nav-search input{
  width:100%;height:44px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--surface);
  padding:0 72px 0 46px;font-size:var(--fs-sm);color:var(--ink);
  transition:border-color var(--tr),box-shadow var(--tr),background-color var(--tr);
}
.nav-search input::placeholder{color:var(--muted);}
.nav-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100);}
.nav-search kbd{
  position:absolute;right:10px;font-size:.6875rem;color:var(--muted);
  border:1px solid var(--line);border-radius:var(--r-sm);
  padding:2px 8px;background:var(--paper);font-family:var(--font-sans);
}
.nav-links{display:flex;align-items:center;gap:6px;flex:0 0 auto;}
.nav-link{
  padding:9px 14px;border-radius:var(--r-pill);font-size:var(--fs-sm);
  font-weight:600;color:var(--ink-2);white-space:nowrap;
}
.nav-link:hover{color:var(--brand);background:var(--brand-100);}
.nav-link.is-active{color:var(--brand);background:var(--brand-100);}
.search-toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-pill);
  border:1px solid var(--line);color:var(--ink-2);background:var(--surface);
  align-items:center;justify-content:center;
}
.search-toggle:hover{border-color:var(--brand);color:var(--brand);}

.header-sub{border-top:1px solid var(--line);}
.chips-row{
  display:flex;align-items:center;gap:10px;
  padding-top:10px;padding-bottom:10px;
  overflow-x:auto;white-space:nowrap;
  scrollbar-width:none;
}
.chips-row::-webkit-scrollbar{display:none;}
.chips-nav{display:flex;align-items:center;gap:10px;}
.chips-sep{width:1px;height:18px;background:var(--line);display:inline-block;}

/* 移动搜索层 */
.search-overlay{
  position:fixed;inset:0;z-index:90;background:rgba(20,17,14,.55);
  display:none;padding:16px;
}
.search-overlay.is-open{display:block;}
.search-overlay__box{
  background:var(--surface);border-radius:var(--r-lg);padding:18px;
  max-width:560px;margin:8px auto 0;box-shadow:var(--shadow-1);
}
.search-overlay__row{display:flex;align-items:center;gap:10px;}
.search-overlay__row input{
  flex:1;height:46px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:var(--paper);padding:0 18px;font-size:var(--fs-sm);
}
.search-overlay__row input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100);}
.search-overlay__close{
  width:42px;height:42px;border-radius:var(--r-pill);border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-2);
}
.search-overlay__close:hover{border-color:var(--brand);color:var(--brand);}
.search-overlay__label{font-size:var(--fs-xs);color:var(--muted);margin:16px 0 10px;}
.search-overlay__tags{display:flex;flex-wrap:wrap;gap:8px;}

/* ---------- 文章容器 ---------- */
.article-page{padding:28px 0 clamp(64px,8vw,110px);}
.breadcrumb{margin-bottom:26px;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:var(--fs-sm);color:var(--muted);}
.breadcrumb li{display:inline-flex;align-items:center;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--line);}
.breadcrumb .is-current span{
  display:inline-block;max-width:44ch;overflow:hidden;text-overflow:ellipsis;
  white-space:nowrap;vertical-align:bottom;color:var(--ink-2);font-weight:600;
}

.article-shell{max-width:860px;margin:0 auto;}
.article-head{padding-bottom:26px;border-bottom:1px solid var(--line);}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  font-size:var(--fs-xs);color:var(--muted);margin-bottom:18px;
}
.article-meta .meta-div{width:1px;height:14px;background:var(--line);}
.article-title{
  font-size:clamp(1.75rem,4vw,2.75rem);font-weight:900;line-height:1.22;
  letter-spacing:-.02em;color:var(--ink);
}
.article-lead{
  margin-top:16px;font-size:1.0625rem;color:var(--muted);line-height:1.8;max-width:62ch;
}
.article-figure{margin:32px 0 0;}
.article-figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line);
}
.article-figure figcaption{
  margin-top:10px;text-align:center;font-size:var(--fs-xs);color:var(--muted);
}

/* ---------- 正文排版 ---------- */
.article-body{
  margin-top:40px;max-width:760px;
  font-size:1.0625rem;line-height:1.9;color:var(--ink-2);
}
.article-body > * + *{margin-top:1.3em;}
.article-body h2{
  position:relative;padding-left:15px;
  font-size:clamp(1.4rem,2.4vw,1.75rem);font-weight:800;line-height:1.4;color:var(--ink);
  margin-top:2.2em;margin-bottom:.8em;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;
  border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:1.15rem;font-weight:700;color:var(--ink);margin-top:1.9em;margin-bottom:.6em;}
.article-body h4{font-size:1.0625rem;font-weight:700;color:var(--ink);margin-top:1.6em;margin-bottom:.5em;}
.article-body p{margin:0;}
.article-body strong{color:var(--ink);font-weight:700;}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand-600);}
.article-body ul,.article-body ol{padding-left:1.5em;}
.article-body ul li,.article-body ol li{margin:.5em 0;}
.article-body ul{list-style:none;}
.article-body ul li{position:relative;}
.article-body ul li::before{
  content:"";position:absolute;left:-1.15em;top:.78em;
  width:6px;height:6px;background:var(--brand);
}
.article-body ol{list-style:decimal;}
.article-body ol li::marker{color:var(--brand);font-weight:700;}
.article-body blockquote{
  margin:1.8em 0;padding:18px 22px;background:var(--paper);
  border-left:3px solid var(--brand);border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--ink-2);
}
.article-body blockquote p + p{margin-top:.8em;}
.article-body img{border-radius:var(--r-md);border:1px solid var(--line);margin:1.6em auto;}
.article-body figure{margin:1.8em 0;}
.article-body figcaption{margin-top:10px;text-align:center;font-size:var(--fs-xs);color:var(--muted);}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.9em;background:var(--brand-100);color:var(--brand-600);
  padding:2px 6px;border-radius:6px;
}
.article-body pre{
  background:var(--ink);color:#F3EFE9;padding:18px 20px;border-radius:var(--r-md);
  overflow-x:auto;font-size:var(--fs-sm);line-height:1.7;
}
.article-body pre code{background:none;color:inherit;padding:0;}
.article-body table{
  width:100%;border-collapse:collapse;font-size:var(--fs-sm);
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
}
.article-body thead th{background:var(--paper);font-weight:700;color:var(--ink);}
.article-body th,.article-body td{
  border:1px solid var(--line);padding:11px 14px;text-align:left;vertical-align:top;
}
.article-body table{display:block;overflow-x:auto;white-space:normal;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.2em 0;}

.empty-state{
  margin-top:40px;max-width:760px;padding:44px 28px;text-align:center;
  border:1px dashed var(--line);border-radius:var(--r-md);background:var(--surface);
}
.empty-state h2{font-size:1.375rem;margin-bottom:10px;}
.empty-state p{color:var(--muted);margin-bottom:20px;}

.article-actions{
  display:flex;flex-wrap:wrap;align-items:center;gap:18px;
  margin-top:44px;padding-top:24px;border-top:1px solid var(--line);
}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:var(--fs-sm);font-weight:700;color:var(--ink-2);
}
.text-link:hover{color:var(--brand);}
.text-link i{font-size:.75rem;transition:transform var(--tr);}
.text-link:hover i{transform:translateX(3px);}

/* ---------- 相关推荐 ---------- */
.related{margin-top:clamp(48px,6vw,76px);}
.section-head{margin-bottom:22px;}
.eyebrow{
  display:inline-block;font-size:var(--fs-xs);font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand);margin-bottom:8px;
}
.section-head h2{font-size:clamp(1.4rem,2.6vw,1.9rem);}
.related-list{display:grid;grid-template-columns:1fr;gap:14px;}
.related-card{
  display:grid;grid-template-columns:180px 1fr;gap:18px;align-items:center;
  padding:14px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);transition:border-color var(--tr),transform var(--tr);
}
.related-card:hover{border-color:var(--brand-100);transform:translateY(-2px);}
.related-card:hover h3{color:var(--brand);}
.related-thumb{overflow:hidden;border-radius:var(--r-sm);}
.related-thumb img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  transition:transform 240ms var(--ease);
}
.related-card:hover .related-thumb img{transform:scale(1.03);}
.related-body h3{font-size:1.0625rem;line-height:1.45;margin:8px 0 6px;transition:color var(--tr);}
.related-body p{font-size:var(--fs-sm);color:var(--muted);line-height:1.65;}

/* ---------- CTA 条 ---------- */
.cta-strip{
  margin-top:clamp(56px,7vw,90px);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:30px 32px;
}
.cta-strip__inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;}
.cta-strip h2{font-size:clamp(1.25rem,2.4vw,1.6rem);margin-bottom:6px;}
.cta-strip p{font-size:var(--fs-sm);color:var(--muted);}

/* ---------- 浮动按钮 ---------- */
.float-stack{
  position:fixed;right:24px;bottom:calc(24px + env(safe-area-inset-bottom,0px));
  z-index:70;display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--tr),transform var(--tr),visibility var(--tr);
}
.float-stack.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.btn-float{
  display:inline-flex;align-items:center;gap:8px;padding:12px 20px;
  border-radius:var(--r-pill);background:var(--brand);color:#fff;font-weight:700;
  font-size:var(--fs-sm);box-shadow:var(--shadow-1);
}
.btn-float:hover{background:var(--brand-600);color:#fff;transform:translateY(-2px);}
.back-top{
  width:44px;height:44px;border-radius:50%;background:var(--surface);
  border:1px solid var(--line);color:var(--ink-2);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-1);
}
.back-top:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(250,248,245,.72);margin-top:clamp(64px,8vw,110px);}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;
  padding:clamp(48px,6vw,76px) 24px clamp(32px,4vw,48px);
  border-top:1px solid rgba(250,248,245,.16);
}
.footer-brand p{font-size:var(--fs-sm);line-height:1.8;margin:16px 0 18px;max-width:34ch;}
.footer-col h3{font-size:var(--fs-sm);color:var(--paper);margin-bottom:16px;font-weight:700;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:var(--fs-sm);color:rgba(250,248,245,.72);}
.footer-col a:hover{color:var(--accent);}
.subscribe{display:flex;gap:8px;align-items:center;flex-wrap:wrap;}
.subscribe input{
  flex:1 1 180px;height:42px;border-radius:var(--r-pill);
  background:rgba(250,248,245,.06);border:1px solid rgba(250,248,245,.22);
  padding:0 16px;font-size:var(--fs-xs);color:var(--paper);
}
.subscribe input::placeholder{color:rgba(250,248,245,.45);}
.subscribe input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(232,80,42,.25);}
.form-note{font-size:var(--fs-xs);color:var(--accent);margin-top:8px;min-height:16px;}
.footer-bottom{border-top:1px solid rgba(250,248,245,.16);}
.footer-bottom__inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-top:18px;padding-bottom:18px;
}
.footer-bottom p,.footer-bottom a{font-size:var(--fs-xs);color:rgba(250,248,245,.6);}
.footer-bottom a:hover{color:var(--accent);}
.footer-bottom ul{display:flex;gap:18px;}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity 520ms var(--ease),transform 520ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .header-main{height:64px;gap:12px;}
  .nav-search{display:none;}
  .search-toggle{display:inline-flex;}
  .nav-link{padding:8px 10px;font-size:var(--fs-xs);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .article-shell,.article-body{max-width:100%;}
  .related-card{grid-template-columns:140px 1fr;gap:14px;}
  .article-title{font-size:clamp(1.5rem,6.4vw,2rem);}
  .cta-strip{padding:24px 20px;}
  .cta-strip__inner{flex-direction:column;align-items:flex-start;}
  .cta-strip .btn{width:100%;}
}
@media (max-width:640px){
  .brand-text{font-size:.98rem;}
  .nav-links .nav-link{display:none;}
  .related-card{grid-template-columns:1fr;}
  .related-thumb img{aspect-ratio:16/9;}
  .float-stack{right:16px;bottom:calc(16px + env(safe-area-inset-bottom,0px));}
  .btn-float{padding:10px 16px;font-size:var(--fs-xs);}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom__inner{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .article-meta{gap:8px;}
  .article-meta .meta-div{display:none;}
  .breadcrumb .is-current span{max-width:22ch;}
}

/* roulang page: category2 */
/* =========================================================
   设计变量
   ========================================================= */
:root{
  --brand:#E8502A;
  --brand-600:#C93E1C;
  --brand-100:#FDEDE6;
  --accent:#C8F04A;
  --ink:#14110E;
  --ink-2:#3D3833;
  --muted:#7A736A;
  --paper:#FAF8F5;
  --surface:#FFFFFF;
  --line:#E6E0D8;
  --ok:#2E7D5B;
  --warn:#B7791F;

  --r-sm:8px;
  --r-md:14px;
  --r-lg:24px;
  --r-pill:999px;

  --shadow-1:0 1px 2px rgba(20,17,14,.04),0 12px 32px -18px rgba(20,17,14,.18);

  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;

  --fs-h1:clamp(2rem,4.8vw,3.25rem);
  --fs-h2:clamp(1.6rem,3vw,2.3rem);
  --fs-h3:1.25rem;
  --fs-body:1.0625rem;
  --fs-sm:.875rem;
  --fs-xs:.8125rem;

  --ease:cubic-bezier(.2,.7,.3,1);
  --header-h:112px;
}

/* =========================================================
   基础 reset
   ========================================================= */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:var(--fs-body);
  line-height:1.75;
  color:var(--ink-2);
  background:var(--paper);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:800;line-height:1.22;letter-spacing:-0.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:var(--ink-2);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease);}
a:hover{color:var(--brand);}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font-family:inherit;font-size:inherit;}
figure{margin:0;}
table{border-collapse:collapse;width:100%;}

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

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;
}

/* =========================================================
   容器与通用间距
   ========================================================= */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:1441px){
  .container{max-width:1280px;}
}

.section{padding:clamp(64px,8vw,120px) 0;border-top:1px solid var(--line);}
.section:first-of-type{border-top:0;}
.section--tint{background:linear-gradient(180deg,#F4F1EC 0%,var(--paper) 100%);}

.section-head{max-width:720px;margin-bottom:clamp(32px,4vw,56px);}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:var(--fs-xs);font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand);
  background:var(--brand-100);border:1px solid #F6D9CD;
  padding:5px 12px;border-radius:var(--r-pill);margin-bottom:18px;
}
.section-head h2{font-size:var(--fs-h2);font-weight:800;}
.section-head p{margin-top:14px;color:var(--ink-2);max-width:62ch;}

[id]{scroll-margin-top:calc(var(--header-h) + 24px);}

/* =========================================================
   按钮
   ========================================================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-pill);
  font-size:var(--fs-body);font-weight:700;line-height:1;
  border:1px solid transparent;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;border-color:var(--brand);}
.btn-primary:hover{background:var(--brand-600);border-color:var(--brand-600);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-light{background:#fff;color:var(--ink);border-color:#fff;}
.btn-light:hover{background:var(--brand-100);border-color:var(--brand-100);color:var(--brand);}
.btn-sm{padding:9px 18px;font-size:var(--fs-sm);}
.btn-lg{padding:16px 32px;font-size:1.0625rem;}

/* 标签 */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:var(--r-pill);
  font-size:var(--fs-sm);color:var(--ink-2);
  background:var(--surface);border:1px solid var(--line);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.chip:hover{background:var(--brand-100);border-color:#F3D3C6;color:var(--brand);}
.chip--tag{
  background:var(--brand-100);border-color:transparent;color:var(--brand);
  font-size:var(--fs-xs);font-weight:700;padding:4px 10px;
}
.chip--nav{font-weight:600;}
.chip--nav.is-active{background:var(--ink);border-color:var(--ink);color:#fff;}
.chip--nav.is-active:hover{color:#fff;}
.chip--accent{background:var(--accent);border-color:var(--accent);color:var(--ink);font-weight:700;}

/* =========================================================
   导航
   ========================================================= */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(250,248,245,.96);
  border-bottom:1px solid var(--line);
  transition:background .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(250,248,245,.86);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  box-shadow:0 8px 24px -20px rgba(20,17,14,.5);
}
.header-main{
  display:flex;align-items:center;gap:20px;
  min-height:72px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:var(--ink);
  display:inline-flex;align-items:center;justify-content:center;
  flex:0 0 auto;
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{font-size:1.0625rem;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}
.brand-text em{font-style:normal;color:var(--brand);}

.nav-search{
  position:relative;flex:1 1 auto;max-width:560px;min-width:220px;
  display:flex;align-items:center;gap:10px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-pill);padding:0 16px;height:44px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-search:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 3px var(--brand-100);
}
.nav-search i{color:var(--muted);font-size:.9rem;}
.nav-search input{
  flex:1 1 auto;border:0;background:transparent;outline:none;
  color:var(--ink);font-size:var(--fs-sm);min-width:0;
}
.nav-search input::placeholder{color:var(--muted);}
.nav-search kbd{
  font-family:var(--font-sans);font-size:11px;color:var(--muted);
  border:1px solid var(--line);border-radius:6px;padding:2px 6px;
  background:#F7F4F0;flex:0 0 auto;
}

.nav-links{display:flex;align-items:center;gap:6px;flex:0 0 auto;}
.nav-link{
  padding:9px 13px;border-radius:var(--r-pill);
  font-size:var(--fs-sm);font-weight:600;color:var(--ink-2);white-space:nowrap;
}
.nav-link:hover{background:var(--brand-100);color:var(--brand);}
.nav-link.is-active{color:var(--ink);background:#EFEAE3;}
.nav-link.is-active:hover{color:var(--brand);}
.nav-links .btn{margin-left:8px;}

.search-toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
  align-items:center;justify-content:center;flex:0 0 auto;
}

.header-sub{border-top:1px solid var(--line);background:rgba(255,255,255,.5);}
.chips-row{
  display:flex;align-items:center;gap:10px;
  padding-top:10px;padding-bottom:10px;
  overflow-x:auto;scrollbar-width:none;
}
.chips-row::-webkit-scrollbar{display:none;}
.chips-nav{display:flex;align-items:center;gap:8px;flex:0 0 auto;}
.chips-sep{width:1px;height:22px;background:var(--line);flex:0 0 auto;}
.chips-row > .chip{flex:0 0 auto;}

/* 搜索覆盖层 */
.search-overlay{
  position:fixed;inset:0;z-index:90;
  background:rgba(20,17,14,.55);
  -webkit-backdrop-filter:blur(4px);
  backdrop-filter:blur(4px);
  padding:20px;
  display:flex;flex-direction:column;gap:16px;
  align-items:center;justify-content:flex-start;
}
.search-overlay[hidden]{display:none;}
.search-overlay__head{
  width:100%;max-width:640px;display:flex;gap:10px;align-items:center;
  background:var(--surface);border-radius:var(--r-pill);
  padding:8px 10px 8px 18px;margin-top:60px;
}
.search-overlay__head .nav-search{border:0;box-shadow:none;padding:0;height:44px;flex:1;}
.search-overlay__head .nav-search:focus-within{box-shadow:none;}
.search-close{
  width:40px;height:40px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--surface);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.search-hot{
  width:100%;max-width:640px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  color:rgba(255,255,255,.85);font-size:var(--fs-sm);
}
.search-hot .chip{background:rgba(255,255,255,.94);border-color:transparent;}

/* =========================================================
   横幅
   ========================================================= */
.page-banner{
  position:relative;overflow:hidden;
  min-height:380px;display:flex;align-items:center;
  border-bottom:1px solid var(--line);
}
.banner-bg{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;object-position:center;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(20,17,14,.74) 0%,rgba(20,17,14,.58) 46%,rgba(20,17,14,.42) 100%);
}
.banner-inner{
  position:relative;z-index:2;
  padding:clamp(48px,7vw,80px) 20px;
  max-width:840px;
}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:var(--fs-sm);color:rgba(250,248,245,.75);margin-bottom:18px;
}
.breadcrumb a{color:rgba(250,248,245,.75);}
.breadcrumb a:hover{color:#fff;}
.breadcrumb .sep{color:rgba(250,248,245,.45);}
.breadcrumb .cur{color:#fff;font-weight:600;}

.banner-inner .banner-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:var(--fs-xs);font-weight:700;letter-spacing:.12em;
  color:var(--ink);background:var(--accent);
  padding:5px 12px;border-radius:var(--r-pill);margin-bottom:20px;
}
.banner-inner h1{
  color:#fff;font-size:var(--fs-h1);font-weight:900;
  line-height:1.1;letter-spacing:-.02em;
}
.banner-inner h1 span{display:block;}
.banner-inner .banner-sub{
  margin-top:18px;color:rgba(250,248,245,.86);
  max-width:36em;font-size:1.0325rem;
}
.banner-actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:12px;}

/* =========================================================
   数字条
   ========================================================= */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);overflow:hidden;
}
.stat-cell{
  padding:26px 24px;border-left:1px solid var(--line);
}
.stat-cell:first-child{border-left:0;}
.stat-cell .stat-num{
  font-size:clamp(1.8rem,3.2vw,2.4rem);font-weight:900;color:var(--ink);
  line-height:1.05;letter-spacing:-.02em;
}
.stat-cell .stat-num i{font-style:normal;color:var(--brand);}
.stat-cell .stat-label{margin-top:8px;font-size:var(--fs-sm);color:var(--muted);}

/* =========================================================
   对照式定义列表
   ========================================================= */
.defs{border-top:1px solid var(--line);}
.def-row{
  display:grid;grid-template-columns:minmax(180px,3.4fr) 8fr;
  gap:36px;padding:30px 0;border-bottom:1px solid var(--line);
}
.def-term h3{font-size:1.15rem;font-weight:800;display:flex;align-items:baseline;gap:10px;}
.def-term .def-num{
  font-size:var(--fs-xs);font-weight:900;color:var(--brand);
  background:var(--brand-100);border-radius:var(--r-pill);
  padding:2px 9px;flex:0 0 auto;
}
.def-desc p{color:var(--ink-2);}
.def-desc p + p{margin-top:12px;}
.point-list{margin-top:16px;display:grid;gap:10px;}
.point-list li{
  position:relative;padding-left:20px;font-size:var(--fs-sm);color:var(--ink-2);
}
.point-list li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:8px;height:8px;background:var(--brand);border-radius:2px;
}

/* =========================================================
   图文块
   ========================================================= */
.media-block{
  display:grid;grid-template-columns:1fr 1fr;
  gap:clamp(24px,4vw,56px);align-items:center;
}
.media-block + .media-block{margin-top:clamp(40px,6vw,80px);}
.media-block--reverse .media-figure{order:2;}
.media-figure{
  border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--line);background:var(--surface);
}
.media-figure img{
  width:100%;aspect-ratio:8/5;object-fit:cover;
  transition:transform .35s var(--ease);
}
.media-figure:hover img{transform:scale(1.03);}
.media-body h3{font-size:var(--fs-h3);font-weight:800;margin-bottom:12px;}
.media-body p + p{margin-top:12px;}
.media-body .point-list{margin-top:16px;}

/* =========================================================
   FAQ
   ========================================================= */
.faq-accordion{
  margin:0;list-style:none;background:transparent;
  border-top:1px solid var(--line);
}
.faq-accordion .accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--line);
}
.faq-accordion .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 0;margin:0;background:transparent;border:0;
  color:var(--ink);font-size:1.0625rem;font-weight:700;line-height:1.5;
}
.faq-accordion .accordion-title:hover{color:var(--brand);}
.faq-accordion .accordion-title::after{
  content:"+";font-size:1.5rem;font-weight:400;color:var(--muted);
  line-height:1;flex:0 0 auto;
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.faq-accordion .accordion-item.is-active .accordion-title::after{
  transform:rotate(45deg);color:var(--brand);
}
.faq-accordion .accordion-content{
  padding:0 0 26px;border:0;background:transparent;
  color:var(--ink-2);max-width:68ch;
  animation:faqIn .22s var(--ease);
}
.faq-accordion .accordion-content p + p{margin-top:10px;}
@keyframes faqIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

/* =========================================================
   互链卡片
   ========================================================= */
.link-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
}
.link-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);padding:28px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.link-card:hover{
  border-color:#F3D3C6;box-shadow:var(--shadow-1);transform:translateY(-2px);
}
.link-card h3{font-size:1.15rem;font-weight:800;margin:14px 0 10px;}
.link-card:hover h3{color:var(--brand);}
.link-card p{font-size:var(--fs-sm);color:var(--muted);}
.link-card .link-go{
  margin-top:18px;font-size:var(--fs-sm);font-weight:700;color:var(--brand);
  display:inline-flex;align-items:center;gap:6px;
}
.link-card:hover .link-go i{transform:translateX(3px);}
.link-card .link-go i{transition:transform .2s var(--ease);}

/* =========================================================
   CTA 条
   ========================================================= */
.cta-bar{
  background:var(--ink);color:#FAF8F5;
  border-radius:var(--r-lg);
  padding:clamp(32px,4vw,52px);
  display:flex;align-items:center;justify-content:space-between;
  gap:28px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-bar::before{
  content:"";position:absolute;right:-60px;top:-60px;
  width:200px;height:200px;border-radius:50%;
  background:radial-gradient(circle,rgba(200,240,74,.22),transparent 68%);
}
.cta-bar h2{color:#fff;font-size:var(--fs-h2);font-weight:800;max-width:24ch;}
.cta-bar p{margin-top:12px;color:rgba(250,248,245,.72);max-width:44ch;font-size:var(--fs-sm);}
.cta-bar .cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:2;}

/* =========================================================
   浮动 CTA / 回到顶部
   ========================================================= */
.float-wrap{
  position:fixed;right:24px;bottom:24px;z-index:80;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s;
}
.float-wrap.is-visible{opacity:1;visibility:visible;transform:none;}
.to-top{
  width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-1);
  opacity:0;visibility:hidden;transition:opacity .25s var(--ease),transform .2s var(--ease),visibility .25s;
}
.to-top.is-visible{opacity:1;visibility:visible;}
.to-top:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.float-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand);color:#fff;font-weight:700;font-size:var(--fs-sm);
  padding:13px 22px;border-radius:var(--r-pill);
  box-shadow:var(--shadow-1);
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.float-cta:hover{background:var(--brand-600);color:#fff;transform:translateY(-2px);}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  background:var(--ink);color:rgba(250,248,245,.72);
  margin-top:clamp(64px,8vw,110px);
  border-top:1px solid rgba(250,248,245,.14);
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:32px;padding:clamp(48px,6vw,72px) 20px 40px;
}
.brand--light{color:#fff;}
.brand--light .brand-mark{background:rgba(250,248,245,.14);}
.brand--light .brand-text{color:#fff;}
.brand--light .brand-text em{color:var(--accent);}
.footer-brand p{margin-top:16px;font-size:var(--fs-sm);max-width:34ch;color:rgba(250,248,245,.66);}
.subscribe{
  margin-top:20px;display:flex;gap:8px;align-items:center;
  max-width:360px;
}
.subscribe input{
  flex:1 1 auto;min-width:0;
  background:rgba(250,248,245,.06);
  border:1px solid rgba(250,248,245,.22);
  border-radius:var(--r-pill);
  padding:11px 18px;color:#FAF8F5;font-size:var(--fs-sm);outline:none;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.subscribe input::placeholder{color:rgba(250,248,245,.45);}
.subscribe input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(232,80,42,.25);}
.form-note{margin-top:10px;font-size:var(--fs-xs);color:var(--accent);min-height:1.2em;}

.footer-col h3{
  color:#fff;font-size:var(--fs-sm);font-weight:700;
  letter-spacing:.06em;margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{color:rgba(250,248,245,.68);font-size:var(--fs-sm);}
.footer-col a:hover{color:#fff;}

.footer-bottom{border-top:1px solid rgba(250,248,245,.12);}
.footer-bottom__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;padding-top:20px;padding-bottom:20px;
}
.footer-bottom p{font-size:var(--fs-xs);color:rgba(250,248,245,.55);}
.footer-bottom ul{display:flex;gap:18px;}
.footer-bottom a{font-size:var(--fs-xs);color:rgba(250,248,245,.6);}
.footer-bottom a:hover{color:#fff;}

/* =========================================================
   进入视口动画
   ========================================================= */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1024px){
  .nav-search{max-width:340px;}
  .nav-link{padding:9px 10px;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .stat-cell:nth-child(odd){border-left:0;}
  .stat-cell:nth-child(n+3){border-top:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .def-row{grid-template-columns:1fr;gap:14px;}
  .media-block{grid-template-columns:1fr;}
  .media-block--reverse .media-figure{order:0;}
}

@media (max-width:900px){
  .nav-links .nav-link{display:none;}
  .nav-links .btn{margin-left:0;}
  .nav-search{display:none;}
  .search-toggle{display:inline-flex;}
  .header-main{justify-content:space-between;min-height:64px;}
}

@media (max-width:768px){
  :root{--header-h:104px;}
  .page-banner{min-height:300px;}
  .banner-inner{padding:44px 20px;}
  .banner-actions .btn{width:100%;}
  .link-grid{grid-template-columns:1fr;}
  .cta-bar{padding:28px 22px;}
  .cta-bar .cta-actions{width:100%;}
  .float-wrap{right:16px;bottom:calc(16px + env(safe-area-inset-bottom,0px));}
}

@media (max-width:640px){
  .container{padding:0 16px;}
  body{font-size:1rem;}
  .section{padding:56px 0;}
  .stat-strip{grid-template-columns:1fr;}
  .stat-cell{border-left:0;border-top:1px solid var(--line);}
  .stat-cell:first-child{border-top:0;}
  .footer-grid{grid-template-columns:1fr;padding-top:44px;}
  .subscribe{flex-direction:column;align-items:stretch;}
  .subscribe .btn{width:100%;}
  .footer-bottom__inner{flex-direction:column;align-items:flex-start;}
  .media-figure img{aspect-ratio:16/10;}
  .faq-accordion .accordion-title{font-size:1rem;padding:20px 0;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1 !important;transform:none !important;}
}