/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --c-primary:#FF5A1F;
  --c-primary-dark:#D93F0B;
  --c-primary-soft:rgba(255,90,31,.08);
  --c-accent:#12C2B4;
  --c-warn:#FFC53D;
  --c-ink:#14151A;
  --c-ink-2:#1E2027;
  --c-bg:#FBF8F4;
  --c-surface:#FFFFFF;
  --c-line:#E9E2D9;
  --c-img-bg:#EFEAE3;
  --t-1:#23242A;
  --t-2:#5C5F6B;
  --t-3:#8A8E99;
  --t-inverse:#F5F2EE;
  --container:1200px;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,21,26,.05);
  --sh-2:0 8px 24px -8px rgba(20,21,26,.14);
  --sh-3:0 24px 48px -20px rgba(20,21,26,.28);
  --sp-section:96px;
  --nav-h:112px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace;
}
/* ============ 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:16px;
  line-height:1.9;
  color:var(--t-1);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}
::selection{background:rgba(255,90,31,.18)}
/* ============ 容器 ============ */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:var(--sp-section) 0}
.section--tight{padding:calc(var(--sp-section) * .72) 0}
.section--paper{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border:1.5px solid transparent;border-radius:var(--r-pill);
  font-size:15px;font-weight:650;line-height:1.2;white-space:nowrap;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn--primary{background:var(--c-primary);color:#fff}
.btn--primary:hover{background:var(--c-primary-dark);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn--ghost{background:transparent;border-color:var(--c-primary);color:var(--c-primary)}
.btn--ghost:hover{background:var(--c-primary-soft)}
.btn--light{background:#fff;color:var(--c-ink);border-color:#fff}
.btn--light:hover{background:var(--c-primary-soft);border-color:var(--c-primary);color:var(--c-primary-dark);transform:translateY(-1px)}
.btn--outline-light{background:transparent;border-color:rgba(245,242,238,.42);color:var(--t-inverse)}
.btn--outline-light:hover{border-color:var(--c-accent);color:var(--c-accent)}
.btn--lg{padding:14px 30px;font-size:16px}
.btn--block{width:100%}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:650;
  color:var(--c-primary);text-decoration:underline;text-decoration-color:transparent;
  text-underline-offset:3px;transition:text-decoration-color .18s ease,color .18s ease;
}
.link-arrow:hover{color:var(--c-primary-dark);text-decoration-color:currentColor;text-underline-offset:3px}
.link-arrow svg{transition:transform .18s ease}
.link-arrow:hover svg{transform:translateX(3px)}
.link-accent{color:var(--c-accent);font-weight:650}
.link-accent:hover{text-decoration:underline;text-underline-offset:3px}
/* ============ 双层导航 ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(251,248,244,.92);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--c-line);box-shadow:var(--sh-2)}
.nav-top__inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand__mark{
  width:34px;height:34px;border-radius:10px;background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-size:16px;font-weight:800;
  box-shadow:0 6px 14px -8px rgba(255,90,31,.9);
}
.brand__name{font-size:17px;font-weight:750;letter-spacing:0;white-space:nowrap}
.brand:hover .brand__mark{background:var(--c-primary-dark)}
.search{
  position:relative;display:flex;align-items:center;gap:8px;
  flex:1 1 auto;max-width:420px;margin-left:auto;
}
.search__icon{
  position:absolute;left:15px;top:50%;transform:translateY(-50%);
  display:grid;place-items:center;color:var(--t-3);pointer-events:none;
}
.search input{
  width:100%;height:44px;padding:0 96px 0 42px;border:1px solid var(--c-line);
  border-radius:var(--r-pill);background:#fff;font-size:14px;color:var(--t-1);
  outline:none;transition:border-color .18s ease,box-shadow .18s ease;
}
.search input::placeholder{color:var(--t-3)}
.search input:focus{border-color:var(--c-primary);box-shadow:0 0 0 4px var(--c-primary-soft)}
.search__submit{
  position:absolute;right:5px;top:50%;transform:translateY(-50%);
  height:34px;padding:0 16px;border-radius:var(--r-pill);
  background:var(--c-primary);color:#fff;font-size:13px;font-weight:650;
  transition:background-color .18s ease;
}
.search__submit:hover{background:var(--c-primary-dark)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.search-toggle{
  display:none;width:40px;height:40px;border-radius:50%;
  border:1px solid var(--c-line);background:#fff;color:var(--t-2);
  place-items:center;transition:border-color .18s ease,color .18s ease;
}
.search-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}
.channel-nav{border-top:1px solid var(--c-line);background:rgba(251,248,244,.75);position:relative}
.channel-nav::before,.channel-nav::after{
  content:"";position:absolute;top:0;bottom:0;width:24px;pointer-events:none;z-index:2;
}
.channel-nav::before{left:0;background:linear-gradient(90deg,rgba(251,248,244,.98),rgba(251,248,244,0))}
.channel-nav::after{right:0;background:linear-gradient(270deg,rgba(251,248,244,.98),rgba(251,248,244,0))}
.channel-nav__inner{
  display:flex;align-items:center;gap:10px;height:48px;
  overflow-x:auto;scroll-snap-type:x proximity;
  -ms-overflow-style:none;scrollbar-width:none;
}
.channel-nav__inner::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;scroll-snap-align:start;
  padding:8px 16px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:#fff;
  font-size:14px;font-weight:650;color:var(--t-2);
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.tab:hover{border-color:var(--c-primary);color:var(--c-primary)}
.tab.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.tab.is-active:hover{background:var(--c-primary-dark);border-color:var(--c-primary-dark);color:#fff}
/* ============ Hero ============ */
.hero{padding:64px 0 80px;position:relative;overflow:hidden}
.hero__grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:650;color:var(--c-primary);
  background:var(--c-primary-soft);border-radius:var(--r-pill);padding:5px 14px;
}
.hero__eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-primary)}
.hero__title{
  margin:20px 0 18px;
  font-size:clamp(30px,4.4vw,50px);line-height:1.22;font-weight:800;letter-spacing:0;
}
.hero__lead{font-size:17px;line-height:1.85;color:var(--t-2);max-width:34em}
.hero__cta{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-top:30px}
.hero__badges{
  display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:32px;
  padding-top:22px;border-top:1px solid var(--c-line);
}
.hero__badges li{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--t-2);font-weight:600;
}
.hero__badges svg{color:var(--c-accent);flex:0 0 auto}
.hero__media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--c-line);box-shadow:var(--sh-3);background:var(--c-img-bg);
}
.hero__media::after{content:"";position:absolute;inset:0;background:rgba(255,90,31,.06);pointer-events:none}
.hero__media img{
  width:100%;height:100%;aspect-ratio:4/3;object-fit:cover;
  background:var(--c-img-bg);color:var(--c-primary);font-weight:700;font-size:14px;
}
/* ============ 板块标题 ============ */
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:44px;flex-wrap:wrap;
}
.section-head__title{font-size:clamp(24px,2.6vw,32px);line-height:1.32;font-weight:700}
.section-head__sub{margin-top:10px;font-size:15px;color:var(--t-2)}
.section-head--center{display:block;text-align:center;max-width:640px;margin:0 auto 44px}
/* ============ 痛点区 ============ */
.pain-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.pain-item{
  display:flex;gap:22px;padding:26px 28px;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-1);
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.pain-item:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#ded4c8}
.pain-item__num{
  font-family:var(--font-mono);font-size:40px;line-height:1;font-weight:700;
  color:var(--c-primary);opacity:.85;flex:0 0 auto;
}
.pain-item h3{font-size:18px;line-height:1.45;font-weight:650;margin-bottom:8px}
.pain-item p{font-size:15px;line-height:1.8;color:var(--t-2)}
/* ============ 解决方案 ============ */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:40px 0}
.feature-row + .feature-row{border-top:1px dashed var(--c-line)}
.feature-row--reverse .feature-row__media{order:2}
.feature-row--reverse .feature-row__text{order:1}
.feature-row__label{
  display:inline-block;font-size:12px;font-weight:700;color:var(--c-primary);
  background:var(--c-primary-soft);border-radius:var(--r-pill);padding:4px 12px;margin-bottom:16px;
}
.feature-row__text h3{font-size:20px;line-height:1.45;font-weight:650;margin-bottom:12px}
.feature-row__text p{font-size:15.5px;line-height:1.9;color:var(--t-2);margin-bottom:18px}
.media-frame{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--c-line);
  box-shadow:var(--sh-2);background:var(--c-img-bg);
}
.media-frame img{
  width:100%;height:100%;aspect-ratio:16/10;object-fit:cover;
  background:var(--c-img-bg);color:var(--c-primary);font-weight:700;font-size:14px;
}
/* ============ 成果区 ============ */
.stats{background:var(--c-ink);color:var(--t-inverse);padding:var(--sp-section) 0}
.stats .section-head__title{color:#fff}
.stats .section-head__sub{color:rgba(245,242,238,.7)}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.stat__num{
  font-family:var(--font-mono);font-size:clamp(32px,4vw,46px);
  line-height:1.1;font-weight:700;color:#fff;
}
.stat__num small{font-size:16px;font-weight:600;margin-left:4px;color:var(--c-warn)}
.stat__bar{height:3px;border-radius:99px;background:rgba(245,242,238,.14);margin:16px 0 12px;overflow:hidden}
.stat__bar i{display:block;height:100%;border-radius:99px;background:var(--c-primary)}
.stat__label{font-size:14px;line-height:1.7;color:rgba(245,242,238,.72)}
/* ============ 证言区 ============ */
.testi-track{
  display:flex;gap:20px;overflow-x:auto;padding:4px 4px 22px;margin:0 -4px;
  scroll-snap-type:x mandatory;-ms-overflow-style:none;scrollbar-width:none;
}
.testi-track::-webkit-scrollbar{display:none}
.testi-card{
  flex:0 0 calc((100% - 40px) / 3);scroll-snap-align:start;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:26px;box-shadow:var(--sh-1);
  transition:box-shadow .18s ease,transform .18s ease;
}
.testi-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.testi-card__head{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.avatar{
  width:42px;height:42px;border-radius:50%;flex:0 0 auto;
  display:grid;place-items:center;font-weight:700;font-size:16px;
  background:var(--c-primary-soft);color:var(--c-primary);
}
.avatar--alt{background:rgba(18,194,180,.12);color:#0d8f85}
.testi-card__name{font-size:15px;font-weight:650}
.testi-card__role{font-size:13px;color:var(--t-3)}
.stars{display:flex;gap:2px;color:var(--c-warn);margin-bottom:10px}
.testi-card p{font-size:15px;line-height:1.85;color:var(--t-2)}
/* ============ 最新信息 CMS 区 ============ */
.news-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:24px}
.news-side{display:grid;gap:24px;align-content:start}
.news-card{
  position:relative;display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh-1);
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.news-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#ded4c8}
.news-card__media{overflow:hidden;border-radius:var(--r-sm);margin-bottom:18px;background:var(--c-img-bg)}
.news-card__media img{
  width:100%;height:100%;aspect-ratio:16/9;object-fit:cover;
  background:var(--c-img-bg);color:var(--c-primary);font-weight:700;font-size:14px;
}
.news-card__meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.tag{
  display:inline-flex;align-items:center;padding:3px 11px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary);font-size:12px;font-weight:650;
}
.news-card__time{font-family:var(--font-mono);font-size:12.5px;color:var(--t-3)}
.news-card__title{font-size:17px;line-height:1.5;font-weight:650;margin-bottom:10px}
.news-card--lead .news-card__title{font-size:23px;line-height:1.42;font-weight:750}
.news-card__title a{transition:color .18s ease}
.news-card:hover .news-card__title a{color:var(--c-primary-dark)}
.news-card__desc{
  font-size:14px;line-height:1.8;color:var(--t-2);margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__more{
  margin-top:auto;display:inline-flex;align-items:center;gap:6px;
  font-size:13.5px;font-weight:650;color:var(--c-primary);
}
.news-card__link::after{content:"";position:absolute;inset:0;z-index:1}
.news-card__link{color:inherit}
.news-more{margin-top:24px;border-top:1px solid var(--c-line)}
.news-more__item{
  display:flex;align-items:center;gap:14px;padding:15px 4px;
  border-bottom:1px solid var(--c-line);font-size:15px;
}
.news-more__item::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--c-primary);flex:0 0 auto;
}
.news-more__item a{font-weight:600;flex:1 1 auto;transition:color .18s ease}
.news-more__item a:hover{color:var(--c-primary)}
.news-more__item time{font-family:var(--font-mono);font-size:12.5px;color:var(--t-3);flex:0 0 auto}
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:64px 24px;text-align:center;
  background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--r-md);
}
.empty-state svg{color:var(--t-3)}
.empty-state p{font-size:15px;color:var(--t-2)}
/* ============ FAQ ============ */
.faq{max-width:820px;margin:0 auto;border-top:1px solid var(--c-line)}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;justify-content:space-between;
  align-items:flex-start;gap:24px;padding:24px 4px;
  font-size:18px;line-height:1.5;font-weight:650;color:var(--t-1);
  transition:color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--c-primary)}
.faq-item summary::after{
  content:"";width:16px;height:16px;flex:0 0 auto;margin-top:7px;
  background-image:linear-gradient(var(--c-primary),var(--c-primary)),linear-gradient(var(--c-primary),var(--c-primary));
  background-size:16px 2px,2px 16px;
  background-position:center,center;
  background-repeat:no-repeat;
  transition:transform .2s ease,background-size .2s ease;
}
.faq-item[open] summary::after{transform:rotate(90deg);background-size:16px 2px,0 0}
.faq-item__body{padding:0 4px 26px;max-width:68ch;font-size:16px;line-height:1.85;color:var(--t-2)}
.faq-item__body p + p{margin-top:1.1em}
/* ============ 底部 CTA ============ */
.cta-wrap{padding-bottom:var(--sp-section)}
.cta-band{
  background:var(--c-ink);color:var(--t-inverse);border-radius:var(--r-lg);
  padding:64px 40px;text-align:center;box-shadow:var(--sh-3);
}
.cta-band__title{font-size:clamp(24px,2.8vw,34px);line-height:1.3;font-weight:750;color:#fff}
.cta-band__text{margin:16px auto 0;max-width:52ch;font-size:16px;line-height:1.85;color:rgba(245,242,238,.75)}
.cta-band__actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-top:32px}
/* ============ 页脚 ============ */
.site-footer{background:var(--c-ink);color:rgba(245,242,238,.72);padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand__name{font-size:17px;font-weight:750;color:#fff}
.footer-brand__mark{
  width:32px;height:32px;border-radius:9px;background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:15px;
}
.footer-text{font-size:14px;line-height:1.85;max-width:38ch}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-links a{display:block;padding:6px 0;font-size:14px;color:rgba(245,242,238,.72);transition:color .18s ease}
.footer-links a:hover{color:var(--c-accent)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(245,242,238,.12);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(245,242,238,.55);
}
.footer-bottom span{font-family:var(--font-mono)}
/* ============ 返回顶部 ============ */
.back-top{
  position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;
  background:#fff;border:1px solid var(--c-line);box-shadow:var(--sh-2);
  display:grid;place-items:center;color:var(--c-primary);z-index:90;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s ease,background-color .18s ease,color .18s ease;
}
.back-top.is-visible{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
/* ============ 响应式 ============ */
@media (max-width:1280px){
  :root{--container:1080px}
}
@media (max-width:1024px){
  :root{--sp-section:72px}
  .hero{padding:48px 0 64px}
  .hero__grid{grid-template-columns:1fr;gap:36px}
  .hero__media{order:2}
  .hero__media img{aspect-ratio:16/9}
  .pain-grid{grid-template-columns:1fr}
  .feature-row{grid-template-columns:1fr;gap:28px;padding:32px 0}
  .feature-row--reverse .feature-row__media,
  .feature-row--reverse .feature-row__text{order:0}
  .stats__grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .testi-card{flex:0 0 calc((100% - 20px) / 2)}
  .news-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:720px){
  :root{--sp-section:48px}
  .container{padding:0 16px}
  .nav-top__inner{gap:12px;height:56px}
  .brand__name{font-size:15px}
  .search{display:none}
  .search-toggle{display:grid}
  .nav-actions .btn{padding:9px 16px;font-size:13.5px}
  .site-header{position:relative}
  .site-header.is-search-open .search{
    display:flex;position:absolute;left:0;right:0;top:100%;
    max-width:none;margin:0;padding:12px 16px;background:var(--c-bg);
    border-bottom:1px solid var(--c-line);z-index:110;
  }
  .site-header.is-search-open .search input{height:46px}
  .hero__cta{gap:16px}
  .hero__title{font-size:30px}
  .testi-card{flex:0 0 85%}
  .news-card--lead .news-card__title{font-size:19px}
  .faq-item summary{font-size:16.5px;padding:20px 2px}
  .cta-band{padding:44px 22px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{justify-content:flex-start}
  .back-top{right:16px;bottom:16px}
}
@media (max-width:480px){
  .hero__title{font-size:26px;line-height:1.28}
  .hero__lead{font-size:15.5px}
  .btn{width:100%}
  .hero__cta{align-items:stretch}
  .hero__cta .link-arrow{width:auto;justify-content:flex-start}
  .stats__grid{grid-template-columns:1fr}
  .news-more__item{flex-wrap:wrap;gap:6px}
  .cta-band__actions .btn{width:100%}
}

/* roulang page: article */
:root{
  --c-primary:#FF5A1F;
  --c-primary-deep:#D93F0B;
  --c-accent:#12C2B4;
  --c-warn:#FFC53D;
  --c-ink:#14151A;
  --c-ink-2:#1E2027;
  --c-bg:#FBF8F4;
  --c-surface:#FFFFFF;
  --c-line:#E9E2D9;
  --t-1:#23242A;
  --t-2:#5C5F6B;
  --t-3:#8A8E99;
  --t-invert:#F5F2EE;
  --container:1200px;
  --article-w:780px;
  --nav-h:112px;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,21,26,.05);
  --sh-2:0 8px 24px -8px rgba(20,21,26,.14);
  --sh-3:0 24px 48px -20px rgba(20,21,26,.28);
  --sp-section:96px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,Consolas,"SFMono-Regular","Menlo",monospace;
}
*,*::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:16px;
  line-height:1.9;
  color:var(--t-1);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none;padding:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
em,b,strong{font-style:normal}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(251,248,244,.92);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--c-line);box-shadow:var(--sh-2)}
.nav-top{position:relative}
.nav-top__inner{height:64px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand__mark{
  width:34px;height:34px;border-radius:11px;
  background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-size:17px;font-weight:800;
  box-shadow:0 8px 18px -8px rgba(255,90,31,.9);
}
.brand__name{font-size:17px;font-weight:750;white-space:nowrap;color:var(--c-ink)}
.search{
  flex:1 1 auto;max-width:400px;height:44px;
  display:flex;align-items:center;gap:8px;
  padding:0 6px 0 14px;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-pill);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(255,90,31,.14)}
.search__icon{display:grid;place-items:center;color:var(--t-3);flex:0 0 auto}
.search input{flex:1 1 auto;min-width:0;height:100%;border:0;background:none;outline:none;font-size:14px}
.search input::placeholder{color:var(--t-3)}
.search__submit{
  height:34px;padding:0 16px;border-radius:var(--r-pill);
  background:var(--c-ink);color:#fff;font-size:13px;font-weight:600;
  transition:background-color .18s ease;
}
.search__submit:hover{background:var(--c-ink-2)}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px;flex:0 0 auto}
.search-toggle{
  display:none;width:40px;height:40px;border-radius:50%;
  background:var(--c-surface);border:1px solid var(--c-line);
  align-items:center;justify-content:center;color:var(--t-2);
  transition:border-color .18s ease,color .18s ease;
}
.search-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);padding:12px 24px;
  font-size:15px;font-weight:650;line-height:1;
  border:1.5px solid transparent;white-space:nowrap;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:0 10px 22px -12px rgba(255,90,31,.95)}
.btn--primary:hover{background:var(--c-primary-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn--ghost{background:transparent;border-color:var(--c-primary);color:var(--c-primary)}
.btn--ghost:hover{background:rgba(255,90,31,.08)}
.btn--light{background:transparent;border-color:rgba(245,242,238,.45);color:var(--t-invert)}
.btn--light:hover{background:rgba(245,242,238,.12);border-color:var(--t-invert)}
.btn--sm{padding:9px 18px;font-size:14px}

.channel-nav{border-top:1px solid var(--c-line)}
.channel-nav__inner{
  height:47px;display:flex;align-items:center;gap:10px;
  overflow-x:auto;scroll-snap-type:x proximity;
  scrollbar-width:none;-ms-overflow-style:none;
  padding-top:6px;padding-bottom:6px;
}
.channel-nav__inner::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;scroll-snap-align:start;
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:var(--r-pill);
  font-size:14.5px;font-weight:600;color:var(--t-2);
  background:var(--c-surface);border:1px solid var(--c-line);
  transition:color .18s ease,background-color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.tab:hover{color:var(--c-primary);border-color:rgba(255,90,31,.55);background:rgba(255,90,31,.06)}
.tab.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;box-shadow:0 10px 20px -12px rgba(255,90,31,.95)}

/* ---------- Article head ---------- */
.article-hero{padding:44px 0 0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--t-3);margin-bottom:18px}
.breadcrumb a{color:var(--t-2);transition:color .18s ease}
.breadcrumb a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px}
.breadcrumb__sep{color:#CFC7BB}
.breadcrumb__current{max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--t-3)}
.article-title{
  font-size:clamp(28px,3.8vw,46px);
  line-height:1.28;
  font-weight:800;
  color:var(--c-ink);
  max-width:920px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;
  margin-top:20px;font-size:13px;color:var(--t-3);
  font-family:var(--font-mono);
}
.article-meta b{color:var(--c-ink);font-weight:700}
.meta-tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);background:rgba(255,90,31,.09);
  color:var(--c-primary-deep);font-weight:600;font-family:var(--font-sans);
}
.meta-sep{width:4px;height:4px;border-radius:50%;background:#D8D0C5}

/* ---------- Layout ---------- */
.article-layout{
  max-width:1080px;margin:0 auto;
  display:grid;grid-template-columns:minmax(0,1fr) 220px;
  gap:56px;align-items:start;
  padding-top:36px;
}
.article-main{min-width:0}

/* ---------- Article body ---------- */
.article-body{font-size:17px;line-height:1.95;color:#2C2E36}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.1em}
.article-body h2{
  position:relative;
  font-size:clamp(21px,2.2vw,26px);
  line-height:1.36;font-weight:700;color:var(--c-ink);
  margin:1.9em 0 .85em;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;
  border-radius:2px;background:var(--c-primary);
}
.article-body h3{font-size:19px;line-height:1.5;font-weight:650;color:var(--c-ink);margin:1.6em 0 .6em}
.article-body h4{font-size:17px;font-weight:650;color:var(--c-ink);margin:1.4em 0 .5em}
.article-body ul{margin:0 0 1.2em}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:.55em}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.74em;width:7px;height:7px;
  border-radius:2px;background:var(--c-primary);
}
.article-body ol{margin:0 0 1.2em;counter-reset:oli}
.article-body ol li{position:relative;padding-left:30px;margin-bottom:.55em;counter-increment:oli}
.article-body ol li::before{
  content:counter(oli);
  position:absolute;left:0;top:.42em;
  width:20px;height:20px;border-radius:6px;
  background:rgba(255,90,31,.12);color:var(--c-primary-deep);
  font-size:12px;font-weight:700;line-height:20px;text-align:center;
  font-family:var(--font-mono);
}
.article-body blockquote{
  margin:1.5em 0;padding:16px 22px;
  border-left:4px solid var(--c-primary);
  background:#FFF4EF;color:var(--t-2);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body a{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--c-primary)}
.article-body img{margin:1.6em auto;border-radius:var(--r-md);box-shadow:var(--sh-1)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--t-3);text-align:center;margin-top:10px;line-height:1.6}
.article-body code{
  font-family:var(--font-mono);font-size:14.5px;
  background:rgba(20,21,26,.06);padding:2px 6px;border-radius:5px;color:var(--c-primary-deep);
}
.article-body pre{
  background:var(--c-ink);color:#EDE9E3;padding:18px 20px;border-radius:var(--r-md);
  overflow-x:auto;font-size:14px;line-height:1.7;margin:1.4em 0;
}
.article-body pre code{background:none;color:inherit;padding:0}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px;
  border:1px solid var(--c-line);border-radius:var(--r-md);overflow:hidden;
}
.article-body th{background:#F4EFE8;color:var(--c-ink);font-weight:650;text-align:left}
.article-body th,.article-body td{padding:11px 14px;border-bottom:1px solid var(--c-line)}
.article-body tr:last-child td{border-bottom:0}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:2.2em 0}

/* ---------- Empty state ---------- */
.empty-state{
  text-align:center;padding:56px 26px;
  background:var(--c-surface);border:1px dashed #DCD3C7;border-radius:var(--r-lg);
}
.empty-state__icon{
  display:inline-grid;place-items:center;width:56px;height:56px;border-radius:50%;
  background:rgba(255,90,31,.1);color:var(--c-primary);margin-bottom:18px;
}
.empty-state__title{font-size:20px;font-weight:700;color:var(--c-ink);margin-bottom:10px}
.empty-state__text{color:var(--t-2);font-size:15px;max-width:460px;margin:0 auto 22px}

/* ---------- TOC ---------- */
.toc{position:sticky;top:calc(var(--nav-h) + 20px);align-self:start}
.toc__title{
  font-size:12.5px;font-weight:700;letter-spacing:.08em;color:var(--t-3);
  margin-bottom:12px;
}
.toc__list{display:block}
.toc__list a{
  display:block;padding:6px 0 6px 14px;
  border-left:2px solid var(--c-line);
  font-size:13.5px;line-height:1.6;color:var(--t-2);
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
}
.toc__list a:hover{color:var(--c-primary);border-left-color:var(--c-primary);background:rgba(255,90,31,.05)}
.toc__list a.is-current{color:var(--c-primary);border-left-color:var(--c-primary);font-weight:650;background:rgba(255,90,31,.06)}

/* ---------- Tags ---------- */
.tag-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:44px;padding-top:26px;border-top:1px solid var(--c-line);
}
.tag-row__label{font-size:13px;color:var(--t-3);margin-right:2px}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;
  border-radius:var(--r-pill);
  background:rgba(255,90,31,.08);color:var(--c-primary-deep);
  font-size:13px;font-weight:600;
  transition:background-color .18s ease,color .18s ease;
}
.tag:hover{background:var(--c-primary);color:#fff}

/* ---------- Related ---------- */
.rel-section{margin-top:52px}
.rel-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:20px}
.rel-head h2{font-size:22px;font-weight:750;color:var(--c-ink)}
.text-link{
  font-size:14px;font-weight:600;color:var(--c-accent);
  transition:color .18s ease;
}
.text-link:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}

.media{position:relative;overflow:hidden;background:#F1ECE5}
.media::before{
  content:attr(data-initial);
  position:absolute;inset:0;display:grid;place-items:center;
  font-size:30px;font-weight:800;color:#CFC5B8;
}
.media img{position:relative;width:100%;height:100%;object-fit:cover;transition:transform .35s ease}

.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D9D0C4}
.rel-card:hover .media img{transform:scale(1.05)}
.rel-card__media{aspect-ratio:16/10}
.rel-card__body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.rel-card__title{
  font-size:15.5px;font-weight:650;line-height:1.5;color:var(--c-ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-card__text{
  font-size:13.5px;line-height:1.72;color:var(--t-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-card__more{margin-top:auto;font-size:13px;font-weight:600;color:var(--c-primary)}

/* ---------- Back links ---------- */
.back-links{display:flex;flex-wrap:wrap;gap:14px;margin-top:44px}
.back-link{
  display:inline-flex;align-items:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:var(--c-surface);
  font-size:14.5px;font-weight:600;color:var(--t-2);
  transition:color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.back-link:hover{color:var(--c-primary);border-color:rgba(255,90,31,.5);box-shadow:var(--sh-2);transform:translateY(-1px)}

/* ---------- CTA band ---------- */
.cta-wrap{margin-top:var(--sp-section)}
.cta-band{
  position:relative;overflow:hidden;
  background:var(--c-ink);color:var(--t-invert);
  border-radius:var(--r-lg);
  padding:56px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band::after{
  content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;
  border-radius:50%;background:rgba(255,90,31,.16);
}
.cta-band__content{position:relative;z-index:1;max-width:620px}
.cta-band__title{font-size:clamp(22px,2.4vw,30px);font-weight:750;line-height:1.35;margin-bottom:12px}
.cta-band__text{color:rgba(245,242,238,.72);font-size:15px;line-height:1.85}
.cta-band__actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:12px}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-ink);color:var(--t-invert);margin-top:var(--sp-section);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand__mark{
  width:30px;height:30px;border-radius:9px;background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-size:15px;font-weight:800;
}
.footer-brand__name{font-size:16px;font-weight:700;color:#fff}
.footer-text{color:rgba(245,242,238,.62);font-size:14px;line-height:1.85;max-width:360px}
.footer-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.03em}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:rgba(245,242,238,.66);font-size:14px;transition:color .18s ease}
.footer-links a:hover{color:var(--c-accent)}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(245,242,238,.14);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(245,242,238,.5);
}

/* ---------- Responsive ---------- */
@media (max-width:1280px){
  .container{max-width:1080px}
  .article-layout{max-width:1000px;gap:44px}
}
@media (max-width:1024px){
  :root{--sp-section:72px;--nav-h:104px}
  .article-layout{grid-template-columns:minmax(0,1fr);max-width:780px;gap:0}
  .toc{display:none}
  .nav-top__inner{height:56px;gap:14px}
  .search{display:none}
  .search-toggle{display:inline-flex}
  .site-header.search-open .search{
    display:flex;position:absolute;left:20px;right:20px;top:64px;
    max-width:none;z-index:6;box-shadow:var(--sh-2);
  }
  .cta-band{padding:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:820px){
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:720px){
  :root{--sp-section:48px}
  .container{padding:0 16px}
  .brand__name{font-size:15.5px}
  .article-hero{padding:28px 0 0}
  .article-layout{padding-top:24px}
  .rel-grid{grid-template-columns:minmax(0,1fr)}
  .rel-head{flex-direction:column;align-items:flex-start}
  .cta-band{padding:30px 24px;border-radius:var(--r-md)}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .site-footer{padding:48px 0 24px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:480px){
  .article-body{font-size:16px;line-height:1.9}
  .btn{padding:11px 20px;font-size:14.5px}
  .cta-band__actions{width:100%}
  .cta-band__actions .btn{flex:1 1 100%}
  .back-links .back-link{flex:1 1 100%;justify-content:center}
}

/* roulang page: category1 */
:root{
  --c-primary:#FF5A1F;
  --c-primary-d:#D93F0B;
  --c-primary-soft:rgba(255,90,31,.08);
  --c-accent:#12C2B4;
  --c-warn:#FFC53D;
  --c-ink:#14151A;
  --c-ink-2:#1E2027;
  --c-bg:#FBF8F4;
  --c-surface:#FFFFFF;
  --c-line:#E9E2D9;
  --c-line-2:#DED5C9;
  --t-1:#23242A;
  --t-2:#5C5F6B;
  --t-3:#8A8E99;
  --t-inv:#F5F2EE;
  --t-inv-2:#B9B7B1;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,21,26,.05);
  --sh-2:0 8px 24px -8px rgba(20,21,26,.14);
  --sh-3:0 24px 48px -20px rgba(20,21,26,.28);
  --container:1200px;
  --sp-section:96px;
  --nav-h:112px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Consolas,"Courier New",monospace;
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  color:var(--t-1);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;background:#EFE9E0;color:transparent}
a{color:inherit;text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--c-primary)}
button{font-family:inherit}
input,button,select,textarea{font-size:100%}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(251,248,244,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--c-line);box-shadow:var(--sh-2)}
.nav-top{position:relative}
.nav-top__inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand__mark{
  display:grid;place-items:center;width:34px;height:34px;border-radius:10px;
  background:var(--c-primary);color:#fff;font-size:16px;font-weight:800;line-height:1;
}
.brand__name{font-size:17px;font-weight:750;color:var(--t-1);white-space:nowrap}
.search{
  position:relative;display:flex;align-items:center;flex:1;max-width:380px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-pill);
  padding:0 4px 0 38px;height:44px;transition:border-color var(--ease),box-shadow var(--ease);
}
.search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-soft)}
.search__icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--t-3);display:flex}
.search input{
  flex:1;min-width:0;border:0;background:transparent;height:42px;
  font-size:14px;color:var(--t-1);outline:none;
}
.search input::placeholder{color:var(--t-3)}
.search__submit{
  border:0;background:var(--c-primary);color:#fff;height:34px;padding:0 16px;
  border-radius:var(--r-pill);font-size:14px;font-weight:650;cursor:pointer;
  transition:background var(--ease);
}
.search__submit:hover{background:var(--c-primary-d)}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto;flex-shrink:0}
.search-toggle{
  display:none;width:42px;height:42px;border-radius:50%;
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--t-2);
  align-items:center;justify-content:center;cursor:pointer;transition:border-color var(--ease),color var(--ease);
}
.search-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}
.channel-nav{position:relative;border-top:1px solid var(--c-line)}
.channel-nav::after{
  content:"";position:absolute;top:0;right:0;width:36px;height:100%;
  background:linear-gradient(90deg,rgba(251,248,244,0),rgba(251,248,244,.96));
  pointer-events:none;
}
.channel-nav__inner{
  display:flex;align-items:center;gap:8px;height:48px;
  overflow-x:auto;scroll-snap-type:x proximity;
  scrollbar-width:none;-ms-overflow-style:none;
}
.channel-nav__inner::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;scroll-snap-align:start;
  padding:7px 16px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:var(--c-surface);
  font-size:14px;font-weight:600;color:var(--t-2);white-space:nowrap;
  transition:all var(--ease);
}
.tab:hover{color:var(--c-primary);border-color:var(--c-primary)}
.tab.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.tab.is-active:hover{color:#fff}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:650;line-height:1.2;cursor:pointer;
  border:1.5px solid transparent;transition:all var(--ease);
}
.btn--primary{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
.btn--primary:hover{background:var(--c-primary-d);border-color:var(--c-primary-d);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn--ghost{background:transparent;color:var(--c-primary);border-color:var(--c-primary)}
.btn--ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-d);border-color:var(--c-primary-d)}
.btn--dark{background:var(--c-ink);color:var(--t-inv);border-color:var(--c-ink)}
.btn--dark:hover{background:var(--c-ink-2);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--sm{padding:9px 18px;font-size:14px}
.link-more{color:var(--c-primary);font-weight:650;font-size:14px;display:inline-flex;align-items:center;gap:6px}
.link-more:hover{text-decoration:underline;text-underline-offset:3px;color:var(--c-primary-d)}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sp-section) 0}
.section--tight{padding:calc(var(--sp-section) * .7) 0}
.section--dark{background:var(--c-ink);color:var(--t-inv)}
.section-head{margin-bottom:40px}
.section-head--split{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.section-title{font-size:clamp(24px,2.6vw,32px);line-height:1.32;font-weight:700;letter-spacing:0}
.section-sub{margin-top:10px;color:var(--t-2);font-size:15px;max-width:660px}
.section--dark .section-sub{color:var(--t-inv-2)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:650;color:var(--c-primary);
  background:var(--c-primary-soft);border-radius:var(--r-pill);
  padding:5px 14px;margin-bottom:16px;
}
.eyebrow::before{content:"";width:14px;height:2px;background:var(--c-primary);border-radius:2px}

/* ---------- Hero ---------- */
.hero{padding:56px 0 var(--sp-section)}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-3);margin-bottom:28px}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb__cur{color:var(--t-2);font-weight:600}
.hero__grid{display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:center}
.hero h1{
  font-size:clamp(30px,4.4vw,50px);line-height:1.22;font-weight:800;letter-spacing:0;
}
.hero__sub{margin-top:20px;font-size:17px;line-height:1.85;color:var(--t-2);max-width:560px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero__facts{display:flex;flex-wrap:wrap;gap:12px 24px;margin-top:28px}
.hero__facts li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--t-2)}
.hero__facts svg{color:var(--c-accent);flex-shrink:0}
.hero__media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--c-line);box-shadow:var(--sh-3);background:#EFE9E0;
}
.hero__media img{width:100%;height:100%;aspect-ratio:7/5;object-fit:cover}
.hero__media::after{content:"";position:absolute;inset:0;background:rgba(255,90,31,.06);pointer-events:none}

/* ---------- 步骤区 ---------- */
.steps-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:32px;align-items:start}
.step-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--c-line-2)}
.step-card{overflow:hidden;display:flex;flex-direction:column}
.step-card__media{overflow:hidden;background:#EFE9E0}
.step-card__media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.step-card__body{padding:22px 22px 24px}
.step-card__no{
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:13px;font-weight:700;
  color:var(--c-primary);background:var(--c-primary-soft);
  border-radius:var(--r-pill);padding:3px 12px;margin-bottom:12px;
}
.step-card h3{font-size:19px;line-height:1.45;font-weight:650}
.step-card p{margin-top:10px;font-size:14.5px;line-height:1.8;color:var(--t-2)}
.step-card .link-more{margin-top:14px}

/* ---------- 侧栏要点 ---------- */
.aside-card{
  position:sticky;top:calc(var(--nav-h) + 16px);
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);padding:26px 24px;
}
.aside-card__title{font-size:17px;font-weight:700;line-height:1.4}
.aside-card__note{margin-top:6px;font-size:13px;color:var(--t-3)}
.check-list{margin-top:18px;display:flex;flex-direction:column;gap:14px}
.check-list li{display:flex;gap:10px;font-size:14px;line-height:1.75;color:var(--t-2)}
.check-list svg{flex-shrink:0;margin-top:5px;color:var(--c-accent)}
.tip-strong{
  margin-top:20px;padding:14px 16px;border-radius:var(--r-sm);
  background:var(--c-primary-soft);border-left:3px solid var(--c-primary);
  font-size:13.5px;line-height:1.75;color:var(--t-1);
}

/* ---------- 情形卡 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.case-card{padding:26px 24px}
.case-card__icon{
  display:grid;place-items:center;width:42px;height:42px;border-radius:12px;
  background:var(--c-primary-soft);color:var(--c-primary);margin-bottom:16px;
}
.case-card h3{font-size:17px;line-height:1.5;font-weight:650}
.case-card p{margin-top:10px;font-size:14.5px;line-height:1.8;color:var(--t-2)}
.case-card .tagline{
  display:inline-block;margin-top:14px;font-family:var(--font-mono);
  font-size:12px;color:var(--t-3);border-top:1px dashed var(--c-line-2);padding-top:10px;width:100%;
}

/* ---------- 数据区 ---------- */
.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px}
.metric{border-top:1px solid rgba(245,242,238,.16);padding-top:22px}
.metric__num{
  font-family:var(--font-mono);font-size:clamp(28px,3.4vw,40px);font-weight:700;
  line-height:1.1;color:#fff;letter-spacing:-.01em;
}
.metric__label{margin-top:10px;font-size:14.5px;color:var(--t-inv-2);line-height:1.6}
.metric__bar{margin-top:16px;height:3px;border-radius:2px;background:rgba(245,242,238,.14);overflow:hidden}
.metric__bar span{display:block;height:100%;background:var(--c-primary);border-radius:2px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto}
.faq__item{border-bottom:1px solid var(--c-line)}
.faq__item:first-child{border-top:1px solid var(--c-line)}
.faq__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:transparent;border:0;padding:22px 0;cursor:pointer;text-align:left;
  font-size:18px;font-weight:650;color:var(--t-1);line-height:1.5;
  transition:color var(--ease);
}
.faq__q:hover{color:var(--c-primary)}
.faq__icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--c-line-2);display:grid;place-items:center;
  color:var(--t-2);transition:transform .2s ease,background var(--ease),color var(--ease),border-color var(--ease);
}
.faq__item.is-open .faq__icon{transform:rotate(45deg);background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.faq__a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .24s ease}
.faq__item.is-open .faq__a{grid-template-rows:1fr}
.faq__a>div{overflow:hidden}
.faq__a p{padding:0 0 24px;font-size:16px;line-height:1.85;color:var(--t-2);max-width:720px}

/* ---------- CTA ---------- */
.cta{background:var(--c-ink);color:var(--t-inv);border-radius:var(--r-lg);padding:56px;position:relative;overflow:hidden}
.cta::after{
  content:"";position:absolute;right:-60px;bottom:-60px;width:260px;height:260px;
  border-radius:50%;background:rgba(255,90,31,.14);
}
.cta__inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta h2{font-size:clamp(24px,2.6vw,32px);line-height:1.32;font-weight:700;color:#fff}
.cta p{margin-top:12px;font-size:15.5px;color:var(--t-inv-2);max-width:560px;line-height:1.8}
.cta__actions{display:flex;gap:14px;flex-wrap:wrap}
.cta__actions .btn--ghost{color:#fff;border-color:rgba(245,242,238,.45)}
.cta__actions .btn--ghost:hover{background:rgba(245,242,238,.12);color:#fff;border-color:#fff}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:var(--t-inv-2);padding:72px 0 32px;margin-top:var(--sp-section)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand__mark{
  display:grid;place-items:center;width:32px;height:32px;border-radius:9px;
  background:var(--c-primary);color:#fff;font-weight:800;font-size:15px;line-height:1;
}
.footer-brand__name{font-size:16.5px;font-weight:700;color:#fff}
.footer-text{font-size:13.5px;line-height:1.85;max-width:340px}
.footer-title{font-size:14px;font-weight:650;color:#fff;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:13.5px;color:var(--t-inv-2)}
.footer-links a:hover{color:var(--c-accent)}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(245,242,238,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;font-family:var(--font-mono);color:#8A8E99;
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:90;
  width:46px;height:46px;border-radius:50%;border:1px solid var(--c-line);
  background:var(--c-surface);color:var(--t-2);box-shadow:var(--sh-2);
  display:grid;place-items:center;cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,color var(--ease),border-color var(--ease);
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--c-primary);border-color:var(--c-primary)}

/* ---------- 断点 ---------- */
@media (max-width:1280px){
  :root{--container:1080px}
  .hero__grid{gap:40px}
}
@media (max-width:1024px){
  :root{--sp-section:72px}
  .hero__grid{grid-template-columns:1fr;gap:32px}
  .hero__sub{max-width:none}
  .hero__media{order:2}
  .hero__media img{aspect-ratio:16/9;max-height:340px}
  .steps-layout{grid-template-columns:1fr}
  .aside-card{position:static}
  .case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}
}
@media (max-width:720px){
  :root{--sp-section:48px;--nav-h:104px}
  .container{padding:0 16px}
  .nav-top__inner{height:56px;gap:12px}
  .search{display:none}
  .search-toggle{display:inline-flex}
  .nav-top.is-search-open .search{
    display:flex;position:absolute;left:0;right:0;top:100%;max-width:none;
    border-radius:0;border-left:0;border-right:0;border-top:1px solid var(--c-line);
    padding:10px 16px 10px 42px;height:auto;background:var(--c-surface);
    box-shadow:var(--sh-2);z-index:5;
  }
  .nav-top.is-search-open .search input{height:40px}
  .brand__name{font-size:15.5px}
  .btn--sm{padding:8px 14px;font-size:13px}
  .hero{padding:32px 0 var(--sp-section)}
  .hero__actions .btn{flex:1 1 auto}
  .hero__media img{max-height:240px}
  .step-grid{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
  .cta{padding:36px 24px}
  .cta__actions{width:100%}
  .cta__actions .btn{flex:1 1 100%}
  .faq__q{font-size:16.5px;padding:18px 0}
  .section-head{margin-bottom:28px}
}
@media (max-width:480px){
  .hero h1{font-size:30px}
  .hero__facts{flex-direction:column;gap:10px}
  .metric-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{font-size:12px}
  .btn{padding:12px 20px;font-size:14.5px}
}

/* roulang page: category2 */
:root{
  --c-primary:#FF5A1F;
  --c-primary-dark:#D93F0B;
  --c-accent:#12C2B4;
  --c-warn:#FFC53D;
  --c-ink:#14151A;
  --c-ink-2:#1E2027;
  --c-bg:#FBF8F4;
  --c-surface:#FFFFFF;
  --c-muted:#F3EDE6;
  --c-line:#E9E2D9;
  --c-text:#23242A;
  --c-text-2:#5C5F6B;
  --c-text-3:#8A8E99;
  --c-on-ink:#F5F2EE;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,21,26,.05);
  --sh-2:0 8px 24px -8px rgba(20,21,26,.14);
  --sh-3:0 24px 48px -20px rgba(20,21,26,.28);
  --container:1200px;
  --nav-h:112px;
  --sp-section:96px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,Consolas,"SFMono-Regular",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-top:var(--nav-h);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}

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

/* ---------- 按钮与链接 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:650;line-height:1.2;border:1.5px solid transparent;
  transition:background-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  cursor:pointer;
}
.btn--primary{background:var(--c-primary);color:#fff}
.btn--primary:hover{background:var(--c-primary-dark);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0);box-shadow:none}
.btn--ghost{background:transparent;border-color:var(--c-primary);color:var(--c-primary)}
.btn--ghost:hover{background:rgba(255,90,31,.08);transform:translateY(-1px)}
.btn--ghost:active{transform:translateY(0)}
.btn--light{background:#fff;color:var(--c-ink);border-color:#fff}
.btn--light:hover{background:rgba(255,255,255,.88);transform:translateY(-1px)}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--c-primary);font-weight:650;font-size:15px;
  border-bottom:1.5px solid transparent;
  transition:border-color .18s ease,color .18s ease,text-underline-offset .18s ease;
}
.link-arrow::after{content:"→";transition:transform .18s ease}
.link-arrow:hover{color:var(--c-primary-dark);text-decoration:underline;text-underline-offset:3px}
.link-arrow:hover::after{transform:translateX(3px)}

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(251,248,244,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--c-line);box-shadow:var(--sh-2)}
.nav-top{border-bottom:1px solid var(--c-line)}
.nav-top__inner{
  position:relative;
  display:flex;align-items:center;gap:20px;
  height:64px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand__mark{
  width:34px;height:34px;border-radius:11px;
  background:var(--c-primary);color:#fff;
  display:grid;place-items:center;
  font-weight:800;font-size:17px;
  box-shadow:0 6px 14px -6px rgba(255,90,31,.7);
}
.brand__name{font-size:17px;font-weight:750;letter-spacing:0;white-space:nowrap}
.search{
  display:flex;align-items:center;gap:8px;
  flex:1 1 auto;max-width:380px;
  height:44px;padding:0 6px 0 14px;
  background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-pill);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(255,90,31,.12)}
.search__icon{display:grid;place-items:center;color:var(--c-text-3);flex-shrink:0}
.search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--c-text);
}
.search input::placeholder{color:var(--c-text-3)}
.search__submit{
  height:34px;padding:0 16px;border:0;border-radius:var(--r-pill);
  background:var(--c-ink);color:#fff;font-size:13px;font-weight:650;cursor:pointer;
  transition:background-color .18s ease;
}
.search__submit:hover{background:var(--c-primary)}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;flex-shrink:0}
.search-toggle{
  display:none;width:42px;height:42px;place-items:center;
  border:1px solid var(--c-line);border-radius:var(--r-pill);
  background:var(--c-surface);cursor:pointer;color:var(--c-text-2);
  transition:border-color .18s ease,color .18s ease;
}
.search-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}
.channel-nav__inner{
  display:flex;align-items:center;gap:10px;
  height:48px;overflow-x:auto;
  scroll-snap-type:x proximity;
  scrollbar-width:none;
}
.channel-nav__inner::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;scroll-snap-align:start;
  padding:7px 16px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:var(--c-surface);
  font-size:14px;font-weight:600;color:var(--c-text-2);
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.tab:hover{border-color:var(--c-primary);color:var(--c-primary)}
.tab.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.tab.is-active:hover{background:var(--c-primary-dark);border-color:var(--c-primary-dark);color:#fff}
.search-open .search{
  display:flex;position:absolute;left:0;right:0;top:calc(100% + 8px);
  max-width:none;z-index:20;box-shadow:var(--sh-2);
}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sp-section) 0}
.section--muted{background:var(--c-muted)}
.section--ink{background:var(--c-ink);color:var(--c-on-ink)}
.section__head{max-width:760px;margin:0 auto 56px;text-align:center}
.section__head--left{margin-left:0;text-align:left}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:13px;font-weight:600;
  color:var(--c-primary);letter-spacing:.04em;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--c-primary)}
.section h2{font-size:clamp(24px,2.6vw,32px);line-height:1.32;font-weight:700}
.section__sub{margin-top:14px;font-size:16px;color:var(--c-text-2);line-height:1.9}
.section--ink .section__sub{color:rgba(245,242,238,.7)}

/* ---------- Hero ---------- */
.hero{padding:64px 0 72px;border-bottom:1px solid var(--c-line)}
.hero__inner{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.tag{
  display:inline-block;padding:6px 14px;border-radius:var(--r-pill);
  background:rgba(255,90,31,.1);color:var(--c-primary);
  font-size:13px;font-weight:650;margin-bottom:20px;
}
.hero h1{
  font-size:clamp(30px,3.8vw,46px);
  line-height:1.22;font-weight:800;
}
.hero__lead{margin-top:20px;font-size:17px;line-height:1.9;color:var(--c-text-2);max-width:30em}
.hero__actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-top:32px}
.trust{
  display:flex;flex-wrap:wrap;gap:12px 26px;
  margin-top:36px;padding-top:24px;border-top:1px dashed var(--c-line);
}
.trust li{
  display:flex;align-items:center;gap:8px;
  font-size:13.5px;color:var(--c-text-2);
}
.trust li::before{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--c-accent);flex-shrink:0;
}
.media{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  background:#EFEBE4;box-shadow:var(--sh-2);
  aspect-ratio:4/3;
}
.media::after{
  content:"九";position:absolute;inset:0;display:grid;place-items:center;
  font-size:54px;font-weight:800;color:rgba(255,90,31,.32);
}
.media img{
  position:relative;z-index:1;width:100%;height:100%;object-fit:cover;
}
.hero__media::before{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background:rgba(255,90,31,.06);
}

/* ---------- 时间轴 ---------- */
.timeline{max-width:920px;margin:0 auto}
.timeline__item{
  position:relative;display:grid;grid-template-columns:56px 1fr;gap:28px;
  padding-bottom:42px;
}
.timeline__item::before{
  content:"";position:absolute;left:27px;top:64px;bottom:6px;width:1px;
  background:linear-gradient(180deg,var(--c-line),rgba(233,226,217,.2));
}
.timeline__item:last-child{padding-bottom:0}
.timeline__item:last-child::before{display:none}
.timeline__mark{
  width:56px;height:56px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--c-bg);border:1px solid rgba(255,90,31,.35);
  color:var(--c-primary);font-family:var(--font-mono);font-size:15px;font-weight:700;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.timeline__item:hover .timeline__mark{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
.timeline__body{padding-top:6px}
.timeline__body h3{font-size:20px;font-weight:650;line-height:1.45}
.timeline__body p{margin-top:10px;font-size:16px;line-height:1.9;color:var(--c-text-2);max-width:38em}
.timeline__meta{
  display:inline-flex;align-items:center;gap:8px;margin-top:14px;
  font-family:var(--font-mono);font-size:12.5px;color:var(--c-text-3);
}
.timeline__meta::before{content:"";width:14px;height:1px;background:var(--c-text-3)}

/* ---------- 卡片 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:26px;box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(255,90,31,.35)}
.card__top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.card h3{font-size:19px;font-weight:650;line-height:1.45}
.card p{margin-top:12px;font-size:15.5px;line-height:1.85;color:var(--c-text-2)}
.badge{
  display:inline-block;padding:4px 11px;border-radius:var(--r-pill);
  background:rgba(18,194,180,.12);color:#0B8F85;
  font-size:12.5px;font-weight:650;white-space:nowrap;
}
.badge--warn{background:rgba(255,197,61,.22);color:#8A6200}
.card__foot{
  display:flex;align-items:center;gap:10px;margin-top:20px;padding-top:16px;
  border-top:1px dashed var(--c-line);
  font-family:var(--font-mono);font-size:12.5px;color:var(--c-text-3);
}

/* ---------- 图文分栏 ---------- */
.split{display:grid;grid-template-columns:0.9fr 1.1fr;gap:56px;align-items:center}
.split__media{aspect-ratio:5/4}
.check-list{margin-top:26px;display:grid;gap:16px}
.check-list li{
  position:relative;padding-left:30px;
  font-size:16px;line-height:1.85;color:var(--c-text-2);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:12px;height:12px;border-radius:3px;background:var(--c-primary);
}
.check-list strong{color:var(--c-text);font-weight:650}
.split .link-arrow{margin-top:28px}

/* ---------- 数据 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:36px}
.stat__num{
  font-family:var(--font-mono);font-size:clamp(32px,3.4vw,44px);
  font-weight:700;line-height:1.1;color:#fff;
}
.stat__num span{font-size:15px;color:rgba(245,242,238,.6);margin-left:6px;font-weight:600}
.stat__label{margin-top:10px;font-size:14.5px;color:rgba(245,242,238,.72)}
.bar{display:block;height:3px;margin-top:16px;border-radius:var(--r-pill);background:rgba(245,242,238,.14);overflow:hidden}
.bar::after{content:"";display:block;height:100%;background:var(--c-primary);border-radius:inherit}
.bar--100::after{width:100%}
.bar--78::after{width:78%}
.bar--62::after{width:62%}
.bar--88::after{width:88%}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto;border-top:1px solid var(--c-line)}
.faq__item{border-bottom:1px solid var(--c-line);transition:background-color .18s ease}
.faq__item:hover{background:rgba(255,255,255,.6)}
.faq__q{
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:22px 6px;cursor:pointer;list-style:none;
  font-size:18px;font-weight:650;line-height:1.6;
}
.faq__q::-webkit-details-marker{display:none}
.faq__icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--c-line);color:var(--c-primary);
  font-size:16px;font-weight:700;line-height:1;
  transition:transform .2s ease,border-color .2s ease,background-color .2s ease;
}
.faq__icon::before{content:"+"}
.faq__item[open] .faq__icon{transform:rotate(180deg);background:rgba(255,90,31,.1);border-color:rgba(255,90,31,.4)}
.faq__item[open] .faq__icon::before{content:"−"}
.faq__a{padding:0 52px 24px 6px;font-size:16px;line-height:1.85;color:var(--c-text-2)}

/* ---------- CTA ---------- */
.cta{
  background:var(--c-ink-2);color:var(--c-on-ink);
  border-radius:var(--r-lg);
  padding:56px 48px;
  display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;
  box-shadow:var(--sh-3);
}
.cta h2{font-size:clamp(24px,2.6vw,32px);line-height:1.32;font-weight:700;color:#fff}
.cta p{margin-top:14px;font-size:16px;line-height:1.9;color:rgba(245,242,238,.72);max-width:34em}
.cta__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta .link-arrow{color:var(--c-warn)}
.cta .link-arrow:hover{color:#fff}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:var(--c-on-ink);padding:72px 0 32px;margin-top:var(--sp-section)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand__mark{
  width:32px;height:32px;border-radius:10px;background:var(--c-primary);
  display:grid;place-items:center;font-weight:800;font-size:16px;color:#fff;
}
.footer-brand__name{font-size:16.5px;font-weight:700;color:#fff}
.footer-text{font-size:14.5px;line-height:1.85;color:rgba(245,242,238,.66);max-width:32em}
.footer-title{font-size:15px;font-weight:650;color:#fff;margin-bottom:16px}
.footer-links{display:grid;gap:11px}
.footer-links a{
  font-size:14.5px;color:rgba(245,242,238,.68);
  transition:color .18s ease,transform .18s ease;
}
.footer-links a:hover{color:var(--c-accent)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:52px;padding-top:24px;
  border-top:1px solid rgba(245,242,238,.12);
  font-family:var(--font-mono);font-size:12.5px;color:rgba(245,242,238,.5);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:90;
  width:44px;height:44px;border-radius:50%;
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-primary);
  display:grid;place-items:center;cursor:pointer;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease,transform .2s ease,background-color .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{transform:translateY(-2px);background:var(--c-primary);color:#fff;border-color:var(--c-primary)}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  :root{--container:1080px}
}
@media (max-width:1024px){
  :root{--sp-section:72px}
  .hero__inner{grid-template-columns:1fr;gap:40px}
  .hero__media{max-width:560px}
  .split{grid-template-columns:1fr;gap:36px}
  .split__media{max-width:520px;aspect-ratio:16/10}
  .stats{grid-template-columns:repeat(2,1fr);gap:32px}
  .cta{grid-template-columns:1fr;padding:44px 34px}
  .cta__actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  :root{--nav-h:104px}
  .search{display:none}
  .search-toggle{display:grid}
  .nav-top__inner{height:56px;gap:12px}
  .brand__name{font-size:15.5px}
  .card-grid{grid-template-columns:1fr}
  .section__head{margin-bottom:40px}
}
@media (max-width:720px){
  :root{--sp-section:48px}
  body{font-size:15.5px}
  .hero{padding:40px 0 48px}
  .hero__media{aspect-ratio:16/10;max-width:none}
  .timeline__item{grid-template-columns:40px 1fr;gap:18px;padding-bottom:32px}
  .timeline__mark{width:40px;height:40px;font-size:13px}
  .timeline__item::before{left:19px;top:48px}
  .trust{gap:10px 18px}
  .stats{grid-template-columns:1fr;gap:26px}
  .faq__q{font-size:16.5px}
  .faq__a{padding-right:10px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding:56px 0 28px}
}
@media (max-width:480px){
  .container{padding:0 16px}
  .btn{width:100%}
  .hero__actions{gap:14px}
  .cta{padding:34px 22px}
  .card{padding:22px}
}

/* roulang page: category3 */
:root{
  --c-primary:#FF5A1F;
  --c-primary-deep:#D93F0B;
  --c-accent:#12C2B4;
  --c-warn:#FFC53D;
  --c-ink:#14151A;
  --c-ink-2:#1E2027;
  --c-bg:#FBF8F4;
  --c-surface:#FFFFFF;
  --c-line:#E9E2D9;
  --t-1:#23242A;
  --t-2:#5C5F6B;
  --t-3:#8A8E99;
  --t-inv:#F5F2EE;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,21,26,.05);
  --sh-2:0 8px 24px -8px rgba(20,21,26,.14);
  --sh-3:0 24px 48px -20px rgba(20,21,26,.28);
  --container:1200px;
  --gutter:24px;
  --sp-section:96px;
  --nav-h:112px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  color:var(--t-1);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
button,input{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:6px}
section[id],div[id]{scroll-margin-top:calc(var(--nav-h) + 16px)}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--c-primary);color:#fff;padding:10px 18px;border-radius:0 0 var(--r-sm) 0;
  text-decoration:none;font-size:14px;
}
.skip-link:focus{left:0}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(251,248,244,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--c-line);box-shadow:var(--sh-2)}
.nav-top__inner{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto}
.brand__mark{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-deep));
  color:#fff;font-size:16px;font-weight:800;letter-spacing:0;
}
.brand__name{font-size:17px;font-weight:800;color:var(--t-1);letter-spacing:0}
.brand:hover .brand__name{color:var(--c-primary)}
.search{
  display:flex;align-items:center;gap:8px;
  margin-left:auto;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-pill);
  padding:0 4px 0 14px;
  height:44px;
  max-width:380px;
  flex:1 1 260px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(255,90,31,.12)}
.search__icon{display:grid;place-items:center;color:var(--t-3);flex:0 0 auto}
.search input{
  flex:1;min-width:0;border:0;background:transparent;height:100%;
  font-size:14px;color:var(--t-1);outline:none;
}
.search input::placeholder{color:var(--t-3)}
.search__submit{
  border:0;background:var(--c-primary);color:#fff;font-weight:650;font-size:14px;
  height:36px;padding:0 18px;border-radius:var(--r-pill);cursor:pointer;
  transition:background .18s ease;
}
.search__submit:hover{background:var(--c-primary-deep)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.search-toggle{
  display:none;width:40px;height:40px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--t-1);
  place-items:center;cursor:pointer;transition:.18s ease;
}
.search-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}
.channel-nav{border-top:1px solid var(--c-line)}
.channel-nav__inner{
  display:flex;align-items:center;gap:8px;height:48px;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  scroll-snap-type:x proximity;
}
.channel-nav__inner::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;scroll-snap-align:start;
  padding:7px 16px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:var(--c-surface);
  color:var(--t-2);font-size:14px;text-decoration:none;white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.tab:hover{border-color:var(--c-primary);color:var(--c-primary);box-shadow:var(--sh-1)}
.tab.is-active{
  background:var(--c-primary);border-color:var(--c-primary);color:#fff;
  box-shadow:0 8px 18px -10px rgba(255,90,31,.95);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-pill);
  border:1.5px solid transparent;font-size:15px;font-weight:650;
  text-decoration:none;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:0 12px 22px -14px rgba(255,90,31,.95)}
.btn--primary:hover{background:var(--c-primary-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:none;box-shadow:none}
.btn--outline{border-color:var(--c-primary);color:var(--c-primary);background:transparent}
.btn--outline:hover{background:rgba(255,90,31,.08)}
.btn--outline:active{background:rgba(255,90,31,.14)}
.btn--light{background:#fff;color:var(--c-primary)}
.btn--light:hover{background:#FFE9DE;color:var(--c-primary-deep);transform:translateY(-1px)}
.btn--sm{padding:9px 18px;font-size:14px}
.link-more{
  color:var(--c-primary);font-weight:650;font-size:15px;text-decoration:none;
  border-bottom:1px solid transparent;transition:border-color .18s ease,color .18s ease;
}
.link-more:hover{border-bottom-color:var(--c-primary);color:var(--c-primary-deep)}
.link-more svg{vertical-align:-2px;margin-left:2px}

/* ============ 通用排版 ============ */
.section{padding:var(--sp-section) 0}
.section--tight{padding:64px 0}
.section--paper{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section__head{margin-bottom:34px}
.section__head--split{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:700;color:var(--c-primary);letter-spacing:.04em;
}
.eyebrow::before{content:"";display:block;width:22px;height:2px;background:var(--c-primary);border-radius:2px}
.section__title{
  font-size:clamp(23px,2.6vw,32px);line-height:1.32;font-weight:700;margin-top:12px;
}
.section__desc{margin-top:10px;color:var(--t-2);font-size:15px;max-width:680px}

/* ============ 首屏 ============ */
.hero{
  background:#FFF7F1;
  border-bottom:1px solid var(--c-line);
  padding:44px 0 56px;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-3);margin-bottom:22px;flex-wrap:wrap}
.breadcrumb a{color:var(--t-2);text-decoration:none}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb span[aria-current]{color:var(--t-1);font-weight:650}
.hero__grid{display:grid;grid-template-columns:7fr 5fr;gap:52px;align-items:center}
.hero__badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  background:rgba(255,90,31,.1);color:var(--c-primary-deep);
  font-size:13px;font-weight:650;
}
.hero__title{
  margin-top:18px;
  font-size:clamp(29px,4.2vw,46px);
  line-height:1.22;font-weight:800;color:var(--t-1);
}
.hero__sub{margin-top:18px;font-size:17px;line-height:1.9;color:var(--t-2);max-width:580px}
.hero__actions{display:flex;align-items:center;gap:18px;margin-top:28px;flex-wrap:wrap}
.hero__trust{
  display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;
  padding-top:22px;border-top:1px dashed var(--c-line);
  font-size:13px;color:var(--t-2);
}
.hero__trust li{display:flex;align-items:center;gap:7px}
.hero__trust svg{color:var(--c-accent);flex:0 0 auto}
.media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  background:#F1EDE7;box-shadow:var(--sh-3);aspect-ratio:4/3;
}
.media::after{
  content:"九";position:absolute;inset:0;display:grid;place-items:center;
  font-size:58px;font-weight:800;color:var(--c-primary);opacity:.28;
}
.media img{
  position:relative;z-index:1;width:100%;height:100%;object-fit:cover;
  color:transparent;
}
.media--tint::before{
  content:"";position:absolute;inset:0;z-index:2;
  background:rgba(255,90,31,.08);pointer-events:none;
}

/* 数据条 */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);
  margin-top:-28px;position:relative;z-index:3;overflow:hidden;
}
.stat{padding:22px 24px;border-left:1px solid var(--c-line)}
.stat:first-child{border-left:none}
.stat__num{font-family:var(--font-mono);font-size:26px;font-weight:700;color:var(--c-primary);line-height:1.2}
.stat__label{margin-top:6px;font-size:13px;color:var(--t-2)}

/* ============ 密集清单 ============ */
.checklist{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;
}
.check-row{
  display:grid;grid-template-columns:56px 1fr auto;gap:20px;align-items:center;
  padding:22px 26px;border-top:1px solid var(--c-line);
  text-decoration:none;color:inherit;
  transition:background .18s ease,padding .18s ease;
}
.check-row:first-child{border-top:none}
.check-row__no{
  font-family:var(--font-mono);font-size:15px;font-weight:700;color:var(--t-3);
  transition:color .18s ease;
}
.check-row__main{min-width:0}
.check-row__title{
  font-size:17px;font-weight:650;color:var(--t-1);line-height:1.5;
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
}
.check-row__desc{margin-top:6px;font-size:14px;line-height:1.75;color:var(--t-2)}
.tag{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:var(--r-pill);
  background:rgba(255,90,31,.1);color:var(--c-primary-deep);
  font-size:12px;font-weight:650;white-space:nowrap;
}
.tag--accent{background:rgba(18,194,180,.12);color:#0B8C82}
.check-row__arrow{
  width:38px;height:38px;border-radius:50%;
  border:1px solid var(--c-line);display:grid;place-items:center;
  color:var(--t-2);transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.check-row:hover{background:#FFF8F3}
.check-row:hover .check-row__no{color:var(--c-primary)}
.check-row:hover .check-row__arrow{
  background:var(--c-primary);border-color:var(--c-primary);color:#fff;transform:translateX(4px);
}
.check-row:active{background:#FFEFE5}

/* ============ 标签区 ============ */
.tag-panel{
  display:grid;grid-template-columns:1fr 360px;gap:40px;align-items:center;
}
.chip-group{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:var(--r-pill);
  background:var(--c-surface);border:1px solid var(--c-line);
  color:var(--t-2);font-size:14px;text-decoration:none;
  transition:.18s ease;
}
.chip:hover{border-color:var(--c-primary);color:var(--c-primary);box-shadow:var(--sh-1);transform:translateY(-2px)}
.chip__count{
  font-family:var(--font-mono);font-size:12px;color:var(--t-3);
  background:var(--c-bg);border-radius:var(--r-pill);padding:1px 8px;
}
.chip:hover .chip__count{background:rgba(255,90,31,.12);color:var(--c-primary-deep)}
.tag-panel .media{aspect-ratio:5/4}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:8px}
.step{
  position:relative;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);padding:26px 24px 24px;box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#F3D9CB}
.step__dot{
  width:34px;height:34px;border-radius:50%;
  background:rgba(255,90,31,.12);color:var(--c-primary-deep);
  display:grid;place-items:center;font-family:var(--font-mono);font-weight:700;font-size:14px;
}
.step__title{margin-top:16px;font-size:17px;font-weight:650;line-height:1.5}
.step__text{margin-top:8px;font-size:14px;line-height:1.8;color:var(--t-2)}

/* ============ 提示条 ============ */
.notice{
  display:flex;gap:16px;align-items:flex-start;
  background:rgba(255,197,61,.14);
  border:1px solid rgba(255,197,61,.55);
  border-radius:var(--r-md);padding:20px 24px;margin-top:32px;
}
.notice__icon{
  flex:0 0 auto;width:34px;height:34px;border-radius:50%;
  background:#FFC53D;color:#5A3E00;display:grid;place-items:center;
}
.notice__title{font-weight:650;font-size:15px}
.notice__text{margin-top:4px;font-size:14px;color:var(--t-2);line-height:1.8}

/* ============ FAQ ============ */
.faq{max-width:820px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-item:first-child{border-top:1px solid var(--c-line)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  padding:22px 0;background:none;border:0;text-align:left;cursor:pointer;
  font-size:18px;font-weight:650;color:var(--t-1);line-height:1.55;
}
.faq-q:hover{color:var(--c-primary)}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--c-line);display:grid;place-items:center;
  color:var(--t-2);font-size:16px;line-height:1;
  transition:transform .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.faq-item.is-open .faq-icon{
  transform:rotate(45deg);background:var(--c-primary);border-color:var(--c-primary);color:#fff;
}
.faq-item.is-open .faq-q{color:var(--c-primary-deep)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-a__inner{padding:0 44px 24px 0;font-size:16px;line-height:1.85;color:var(--t-2)}

/* ============ CTA ============ */
.cta{
  background:var(--c-ink);color:var(--t-inv);
  border-radius:var(--r-lg);padding:52px;
  display:grid;grid-template-columns:1.5fr 1fr;gap:36px;align-items:center;
  box-shadow:var(--sh-3);
}
.cta__title{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.35;color:#fff}
.cta__text{margin-top:14px;font-size:15px;line-height:1.9;color:rgba(245,242,238,.76);max-width:560px}
.cta__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta__meta{
  margin-top:24px;display:flex;flex-wrap:wrap;gap:10px 24px;
  font-size:13px;color:rgba(245,242,238,.6);font-family:var(--font-mono);
}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-ink);color:rgba(245,242,238,.74);padding:64px 0 28px;margin-top:var(--sp-section)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand__mark{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-deep));
  color:#fff;font-weight:800;font-size:15px;
}
.footer-brand__name{color:#fff;font-weight:800;font-size:16px}
.footer-text{font-size:14px;line-height:1.85;color:rgba(245,242,238,.62);max-width:340px}
.footer-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{
  font-size:14px;color:rgba(245,242,238,.7);text-decoration:none;
  transition:color .18s ease,transform .18s ease;width:fit-content;
}
.footer-links a:hover{color:var(--c-accent);transform:translateX(2px)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(245,242,238,.12);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(245,242,238,.48);
}
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:90;
  width:44px;height:44px;border-radius:50%;
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--t-1);
  display:grid;place-items:center;cursor:pointer;opacity:0;pointer-events:none;
  box-shadow:var(--sh-2);transition:opacity .2s ease,transform .2s ease,color .18s ease,border-color .18s ease;
}
.to-top.is-visible{opacity:1;pointer-events:auto}
.to-top:hover{color:var(--c-primary);border-color:var(--c-primary);transform:translateY(-2px)}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  :root{--container:1080px}
}
@media (max-width:1024px){
  :root{--gutter:20px;--sp-section:72px}
  .hero__grid{grid-template-columns:1fr;gap:34px}
  .hero__media .media{aspect-ratio:16/9}
  .stat-strip{grid-template-columns:repeat(2,1fr);margin-top:24px}
  .stat{border-left:1px solid var(--c-line)}
  .stat:nth-child(odd){border-left:none}
  .stat:nth-child(n+3){border-top:1px solid var(--c-line)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .tag-panel{grid-template-columns:1fr;gap:30px}
  .tag-panel .media{aspect-ratio:16/9}
  .cta{grid-template-columns:1fr;padding:40px}
  .cta__actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 24px}
}
@media (max-width:720px){
  :root{--gutter:16px;--sp-section:48px;--nav-h:102px}
  body{font-size:15px}
  .section--tight{padding:48px 0}
  .nav-top__inner{height:56px;gap:12px}
  .brand__name{font-size:15px}
  .brand__mark{width:30px;height:30px;border-radius:9px;font-size:14px}
  .search{display:none}
  .search-toggle{display:grid}
  .nav-actions .btn--primary{padding:9px 16px;font-size:14px}
  .site-header.search-open .search{
    display:flex;position:absolute;left:0;right:0;top:56px;
    max-width:none;border-radius:0;border-left:0;border-right:0;
    height:56px;padding:0 16px 0 18px;z-index:6;
    box-shadow:var(--sh-2);
  }
  .site-header.search-open .search__submit{height:34px;padding:0 14px}
  .channel-nav__inner{height:46px}
  .tab{padding:6px 13px;font-size:13px}
  .hero{padding:30px 0 40px}
  .hero__title{margin-top:14px}
  .hero__actions gap,.hero__actions{gap:12px}
  .hero__actions .btn{flex:1 1 auto}
  .hero__trust{gap:10px 18px}
  .stat{padding:18px}
  .stat__num{font-size:22px}
  .check-row{grid-template-columns:44px 1fr 32px;gap:14px;padding:18px 16px}
  .check-row__title{font-size:16px}
  .check-row__arrow{width:32px;height:32px}
  .steps{grid-template-columns:1fr}
  .faq-q{font-size:16px;padding:18px 0}
  .faq-a__inner{padding:0 0 20px;font-size:15px}
  .cta{padding:30px 22px;border-radius:var(--r-md)}
  .cta__actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .site-footer{padding:48px 0 24px;margin-top:48px}
  .to-top{right:14px;bottom:14px;width:40px;height:40px}
}
@media (max-width:480px){
  .hero__title{font-size:26px}
  .hero__sub{font-size:15px}
  .stat-strip{grid-template-columns:1fr}
  .stat{border-left:none}
  .stat:nth-child(n+2){border-top:1px solid var(--c-line)}
  .btn{padding:11px 18px;font-size:14px;width:100%}
  .hero__actions{width:100%}
  .link-more{font-size:14px}
  .check-row{grid-template-columns:38px 1fr;gap:12px}
  .check-row__arrow{display:none}
  .footer-bottom{flex-direction:column;gap:6px}
}