/* roulang page: index */
:root{
  --brand:#2F63E8;
  --brand-hover:#1E4FCB;
  --brand-active:#1740A8;
  --accent:#00B79A;
  --warn:#FF7A45;
  --ink:#1B2436;
  --ink-2:#5A6577;
  --ink-3:#8A93A5;
  --line:#E7ECF5;
  --line-strong:#D8E0EE;
  --soft:#F5F8FD;
  --page:#F7F9FC;
  --card:#FFFFFF;
  --footer:#101B2E;
  --ring:0 0 0 3px rgba(47,99,232,.28);
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(16,27,46,.04),0 8px 24px rgba(16,27,46,.06);
  --sh-2:0 10px 28px rgba(16,27,46,.10);
  --sh-3:0 24px 60px rgba(16,27,46,.16);
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--page);
  padding-top:0;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-hover)}
button{font:inherit}
input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,dl,figure{margin:0}
ul,ol{padding:0;list-style:none}
svg{display:block}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.skip-link{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;border-radius:var(--r-btn);z-index:99}
.skip-link:focus{left:16px;top:16px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;white-space:nowrap;
  transition:background .2s ease,border-color .2s ease,color .2s ease,transform .18s ease,box-shadow .2s ease;
}
.btn--pri{background:var(--brand);color:#fff}
.btn--pri:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--pri:active{background:var(--brand-active);transform:none;box-shadow:var(--sh-1)}
.btn--sec{background:#fff;color:var(--brand);border-color:var(--line-strong)}
.btn--sec:hover{border-color:var(--brand);background:#F0F4FE;color:var(--brand)}
.btn--sec:active{background:#E4EBFC}
.btn--sm{height:40px;padding:0 16px;font-size:14px}
.btn:focus-visible{outline:none;box-shadow:var(--ring)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand)}
.link-arrow svg{transition:transform .2s ease}
.link-arrow:hover svg{transform:translateX(3px)}

/* ---------- 徽章 ---------- */
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12.5px;letter-spacing:.02em;font-weight:600;line-height:1}
.badge--pri{background:rgba(0,183,154,.10);color:#018D79}
.badge--sec{background:#F0F4FE;color:var(--brand)}
.badge--warm{background:rgba(255,122,69,.12);color:#D8571F}

/* ---------- 头部 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-compact{box-shadow:0 6px 18px rgba(16,27,46,.06)}
.brandbar{padding:16px 0;transition:padding .2s ease}
.site-header.is-compact .brandbar{padding:8px 0}
.brandbar__inner{display:flex;align-items:center;gap:20px}
.logo{display:inline-flex;align-items:center;gap:8px;flex:none}
.logo__text{font-size:19px;font-weight:700;color:var(--brand);letter-spacing:.01em}
.logo__dot{width:7px;height:7px;border-radius:50%;background:var(--accent);display:inline-block}
.search{position:relative;flex:1;max-width:260px;min-width:180px}
.search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--ink-3)}
.search input{
  width:100%;height:42px;padding:0 12px 0 38px;
  border:1px solid var(--line-strong);border-radius:var(--r-input);
  background:#fff;font-size:14px;color:var(--ink);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search input::placeholder{color:var(--ink-3)}
.search input:focus{outline:none;border-color:var(--brand);box-shadow:var(--ring)}
.brandbar__actions{margin-left:auto;display:flex;align-items:center;gap:16px}
.link-quiet{font-size:14px;color:var(--ink-2)}
.link-quiet:hover{color:var(--brand)}
.menu-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line-strong);border-radius:var(--r-btn);background:#fff;color:var(--ink);cursor:pointer;
}
.menu-toggle:focus-visible{outline:none;box-shadow:var(--ring)}
.channelbar{border-top:1px solid var(--line)}
.channelbar__inner{display:flex;align-items:center;gap:28px;min-height:52px}
.channels{display:flex;align-items:center;gap:28px}
.channel{
  position:relative;display:inline-flex;align-items:center;height:52px;
  font-size:15px;font-weight:500;color:var(--ink-2);
  padding:0 10px;border-radius:8px;white-space:nowrap;
}
.channel:hover{color:var(--brand);background:#F0F4FE}
.channel.is-active{color:var(--brand);font-weight:600}
.channel.is-active::after{content:"";position:absolute;left:10px;right:10px;bottom:0;height:2px;background:var(--brand);border-radius:2px}
.channel:focus-visible{outline:none;box-shadow:var(--ring)}

/* ---------- 移动抽屉 ---------- */
.drawer{position:fixed;inset:0;background:#fff;z-index:80;transform:translateX(100%);transition:transform .28s ease;display:flex;flex-direction:column;padding:20px 24px;visibility:hidden}
body.drawer-open .drawer{transform:translateX(0);visibility:visible}
body.drawer-open{overflow:hidden}
.drawer__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer__close{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line-strong);border-radius:var(--r-btn);background:#fff;color:var(--ink);cursor:pointer}
.drawer__close:focus-visible{outline:none;box-shadow:var(--ring)}
.drawer__nav a{display:flex;align-items:center;justify-content:space-between;height:52px;font-size:18px;color:var(--ink);border-bottom:1px solid var(--line)}
.drawer__nav a:hover{color:var(--brand)}
.drawer__cta{margin-top:24px;display:flex;flex-direction:column;gap:12px}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section--soft{background:var(--soft)}
.section--white{background:#fff}
.section--dot{background-image:radial-gradient(rgba(231,236,245,.9) 1px,transparent 1px);background-size:18px 18px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.sec-title{position:relative;padding-left:16px;font-size:30px;line-height:1.3;font-weight:700;letter-spacing:.01em}
.sec-title::before{content:"";position:absolute;left:0;top:.3em;width:4px;height:20px;border-radius:2px;background:var(--brand)}
.sec-lead{margin-top:12px;font-size:15.5px;color:var(--ink-2)}
.hairline{height:1px;background:var(--line);border:0;margin:0}

/* ---------- Hero ---------- */
.hero{background:#fff;border-bottom:1px solid var(--line);padding:64px 0 80px}
.hero__grid{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center;min-height:480px}
.hero__title{font-size:44px;line-height:1.2;font-weight:700;letter-spacing:-.01em}
.hero__title span{color:var(--brand)}
.hero__sub{margin-top:18px;font-size:17px;line-height:1.75;color:var(--ink-2);max-width:32em}
.hero__points{display:flex;flex-wrap:wrap;gap:14px 26px;margin-top:24px;padding-top:20px;border-top:1px solid var(--line)}
.hero__point{display:flex;align-items:center;gap:9px;font-size:14.5px;color:var(--ink-2)}
.point-icon{width:28px;height:28px;border-radius:50%;background:#F0F4FE;color:var(--brand);display:inline-flex;align-items:center;justify-content:center;flex:none}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero__note{margin-top:18px;font-size:13px;color:var(--ink-3)}
.hero__media img{width:100%;aspect-ratio:5/4;object-fit:cover;border-radius:16px;background:#F0F4FE;box-shadow:0 22px 44px rgba(16,27,46,.14)}

/* ---------- 信任条 ---------- */
.trustbar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.trustbar__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:32px 0}
.stat{padding-right:20px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat__num{display:block;font-size:26px;font-weight:700;color:var(--brand);line-height:1.2}
.stat__label{display:block;margin-top:6px;font-size:14px;color:var(--ink-3);line-height:1.6}

/* ---------- 功能分组 ---------- */
.feature-grid{display:grid;grid-template-columns:1fr 1fr 1fr;grid-auto-rows:minmax(0,auto);gap:var(--gap)}
.feature-lg{grid-row:span 2;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.feature-lg:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#C9D6F5}
.feature-lg__media{aspect-ratio:16/10;background:#F0F4FE}
.feature-lg__media img{width:100%;height:100%;object-fit:cover}
.feature-lg__body{padding:24px;display:flex;flex-direction:column;gap:14px;flex:1}
.feature-lg h3{font-size:20px;line-height:1.4}
.feature-lg p{font-size:15px;color:var(--ink-2)}
.tick-list{display:flex;flex-direction:column;gap:10px;margin-top:2px}
.tick-list li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);line-height:1.7}
.tick-list svg{flex:none;color:var(--accent);margin-top:5px}
.feature-sm{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;display:flex;flex-direction:column;gap:8px}
.feature-sm:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#C9D6F5}
.icon-badge{width:40px;height:40px;border-radius:11px;background:rgba(0,183,154,.10);color:#018D79;display:inline-flex;align-items:center;justify-content:center;margin-bottom:6px}
.feature-sm h3{font-size:17px;line-height:1.45}
.feature-sm p{font-size:14.5px;color:var(--ink-2);line-height:1.75}

/* ---------- 使用场景 ---------- */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:36px 0}
.scene + .scene{border-top:1px solid var(--line)}
.scene--rev .scene__media{order:2}
.scene__media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);background:#F0F4FE;box-shadow:var(--sh-1)}
.scene__index{font-size:12.5px;letter-spacing:.02em;color:var(--ink-3);font-weight:600}
.scene h3{font-size:20px;line-height:1.4;margin-top:8px}
.scene p{margin-top:12px;font-size:15.5px;color:var(--ink-2)}
.scene__kicker{margin-top:8px;font-size:14px;color:var(--ink-3)}
.scene__list{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.scene__list li{display:flex;gap:10px;font-size:15px;color:var(--ink-2)}
.scene__list svg{flex:none;color:var(--brand);margin-top:6px}
.scene .link-arrow{margin-top:22px}

/* ---------- 案例 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);display:flex;flex-direction:column;gap:14px;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.case-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#C9D6F5}
.case-card h3{font-size:18px;line-height:1.45}
.case-card__res{display:flex;flex-direction:column;gap:8px}
.case-card__res li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);line-height:1.7}
.case-card__res svg{flex:none;color:var(--brand);margin-top:5px}
.case-card__src{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:12.5px;color:var(--ink-3)}

/* ---------- 方案 ---------- */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);align-items:stretch}
.plan{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:28px 24px;box-shadow:var(--sh-1);display:flex;flex-direction:column;gap:16px;position:relative;transition:transform .22s ease,box-shadow .22s ease}
.plan:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.plan--pick{border:2px solid var(--brand);box-shadow:var(--sh-2)}
.plan__tag{position:absolute;top:-12px;left:24px;height:24px;padding:0 10px;display:inline-flex;align-items:center;border-radius:999px;background:var(--brand);color:#fff;font-size:12.5px;font-weight:600}
.plan h3{font-size:19px;line-height:1.4}
.plan__desc{font-size:14px;color:var(--ink-3)}
.plan__price{font-size:32px;font-weight:700;color:var(--warn);line-height:1.2;letter-spacing:-.01em}
.plan__price small{font-size:14px;font-weight:500;color:var(--ink-3);margin-left:6px;letter-spacing:0}
.plan__feats{display:flex;flex-direction:column;gap:10px;margin-top:4px}
.plan__feats li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2)}
.plan__feats svg{flex:none;color:var(--accent);margin-top:5px}
.plan .btn{margin-top:auto;width:100%}

/* ---------- 最新信息 ---------- */
.news__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;display:flex;flex-direction:column;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#C9D6F5}
.news-card__media{aspect-ratio:16/10;background:#F0F4FE;display:block}
.news-card__media img{width:100%;height:100%;object-fit:cover}
.news-card__body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-card__title{font-size:17px;line-height:1.5;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card__title a{color:var(--ink)}
.news-card__title a:hover{color:var(--brand)}
.news-card__excerpt{font-size:14px;color:var(--ink-2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-card__foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;padding-top:12px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3)}
.news-empty{background:#fff;border:1px dashed var(--line-strong);border-radius:var(--r-card);padding:40px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px}
.news-empty svg{color:#C9D6F5}
.news-empty p{font-size:16px;color:var(--ink-2)}
.compact-wrap{margin-top:48px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden}
.compact-head{padding:20px 24px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:16px}
.compact-head h3{font-size:17px}
.compact-list li + li{border-top:1px solid var(--line)}
.compact-list a{display:flex;align-items:center;justify-content:space-between;gap:16px;height:56px;padding:0 24px;font-size:15px;color:var(--ink)}
.compact-list a:hover{background:#F7F9FC;color:var(--brand)}
.compact-list .meta{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);flex:none}
.compact-list a:hover .meta{color:var(--brand)}

/* ---------- CTA ---------- */
.cta-band{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-band__inner{padding:64px 0;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band h2{font-size:28px;line-height:1.35}
.cta-band p{margin-top:12px;font-size:15.5px;color:var(--ink-2);max-width:44em}
.cta-band__btns{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq__item{background:#fff;border:1px solid var(--line);border-radius:var(--r-img);box-shadow:var(--sh-1);overflow:hidden}
.faq__item.is-open{border-color:#C9D6F5}
.faq__q{width:100%;min-height:56px;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;background:none;border:0;text-align:left;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer}
.faq__q:focus-visible{outline:none;box-shadow:var(--ring)}
.faq__icon{flex:none;color:var(--brand);transition:transform .25s ease}
.faq__item.is-open .faq__icon{transform:rotate(45deg)}
.faq__a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq__item.is-open .faq__a{max-height:420px}
.faq__a p{padding:0 20px 20px;font-size:15.5px;line-height:1.8;color:var(--ink-2)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--footer);color:#C7D0E0;margin-top:0}
.site-footer::before{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--brand),var(--accent))}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;padding:64px 0 40px}
.footer__brand .logo__text{color:#fff}
.footer__brand p{margin-top:16px;font-size:14px;line-height:1.85;color:#98A5BE;max-width:32em}
.footer h3{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer__list{display:flex;flex-direction:column;gap:10px}
.footer__list a{font-size:14px;color:#98A5BE}
.footer__list a:hover{color:#fff}
.footer__contact{display:flex;flex-direction:column;gap:10px;font-size:14px;color:#98A5BE}
.footer__contact strong{color:#fff;font-weight:600}
.footer__bottom{border-top:1px solid rgba(255,255,255,.10);padding:20px 0 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#8A93A5}
.footer__bottom a{color:#8A93A5}
.footer__bottom a:hover{color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero__title{font-size:40px}
}
@media (max-width:1023px){
  .brandbar__actions .link-quiet{display:none}
  .feature-grid{grid-template-columns:1fr 1fr}
  .feature-lg{grid-row:span 1;grid-column:span 2}
  .news__grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .plan-grid{grid-template-columns:1fr}
  .plan--pick{order:0}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .hero{padding:32px 0 48px}
  .hero__grid{grid-template-columns:1fr;gap:28px;min-height:0}
  .hero__media{order:-1}
  .hero__media img{aspect-ratio:16/10;height:240px;box-shadow:0 12px 26px rgba(16,27,46,.12)}
  .hero__title{font-size:32px}
  .hero__sub{font-size:16px}
  .sec-title{font-size:24px}
  .trustbar__grid{grid-template-columns:1fr 1fr;gap:20px;padding:24px 0}
  .stat{border-right:0;border-bottom:1px solid var(--line);padding:0 0 16px}
  .stat:nth-child(3),.stat:nth-child(4){border-bottom:0;padding-bottom:0}
  .feature-grid{grid-template-columns:1fr}
  .feature-lg{grid-column:span 1}
  .scene{grid-template-columns:1fr;gap:20px;padding:28px 0}
  .scene--rev .scene__media{order:0}
  .case-grid{grid-template-columns:1fr}
  .news__grid{grid-template-columns:1fr}
  .cta-band__inner{padding:48px 0;flex-direction:column;align-items:flex-start}
  .cta-band h2{font-size:23px}
  .footer__grid{grid-template-columns:1fr;gap:28px;padding:44px 0 28px}
  .menu-toggle{display:inline-flex}
  .search{display:none}
  .brandbar__actions .btn{display:none}
  .channelbar__inner{overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scrollbar-width:none;-webkit-mask-image:linear-gradient(90deg,#000 84%,transparent);mask-image:linear-gradient(90deg,#000 84%,transparent)}
  .channelbar__inner::-webkit-scrollbar{display:none}
  .channels{gap:8px}
  .channel{scroll-snap-align:start;font-size:14.5px;padding:0 12px}
  .compact-list a{padding:0 16px;font-size:14.5px}
  .compact-head{padding:16px}
}
@media (max-width:559px){
  .hero__title{font-size:28px}
  .sec-title{font-size:22px}
  .btn{width:100%}
  .cta-band__btns{width:100%;flex-direction:column}
  .plan__price{font-size:28px}
  .compact-list .meta time{display:none}
}

/* roulang page: article */
:root{
  --c-primary:#2F63E8;
  --c-primary-hover:#1E4FCB;
  --c-primary-active:#1740A8;
  --c-accent:#00B79A;
  --c-warm:#FF7A45;
  --t-1:#1B2436;
  --t-2:#5A6577;
  --t-3:#8A93A5;
  --line:#E7ECF5;
  --line-strong:#D8E0EE;
  --line-hover:#C9D6F5;
  --bg-page:#F7F9FC;
  --bg-soft:#F5F8FD;
  --bg-plain:#F0F4FE;
  --card:#FFFFFF;
  --c-footer:#101B2E;
  --focus:0 0 0 3px rgba(47,99,232,.28);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(16,27,46,.04), 0 8px 24px rgba(16,27,46,.06);
  --sh-2:0 10px 28px rgba(16,27,46,.10);
  --sh-3:0 24px 60px rgba(16,27,46,.16);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--t-1);
  background:var(--bg-page);
}
img{max-width:100%;display:block;background:var(--bg-plain);border-radius:var(--r-img)}
a{color:var(--c-primary);text-decoration:none;transition:color .16s ease}
a:hover{color:var(--c-primary-hover)}
button,input{font:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--t-1)}
p{margin:0}
ul,ol{margin:0;padding:0}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:8px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--soft{background:var(--bg-soft)}
.section--plain{background:#fff}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section__title{position:relative;font-size:30px;line-height:1.3;padding-left:16px}
.section__title::before{content:"";position:absolute;left:0;top:8px;width:4px;height:20px;border-radius:2px;background:var(--c-primary)}
.section__sub{margin-top:10px;padding-left:16px;color:var(--t-2);font-size:15px}
.textlink-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--c-primary);white-space:nowrap}
.textlink-more svg{transition:transform .16s ease}
.textlink-more:hover svg{transform:translateX(3px)}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-compact{box-shadow:0 6px 18px rgba(16,27,46,.07)}
.brandbar{background:#fff}
.brandbar__inner{display:flex;align-items:center;gap:22px;height:78px;transition:height .2s ease}
.site-header.is-compact .brandbar__inner{height:60px}
.logo{display:inline-flex;align-items:flex-end;gap:6px;font-size:20px;font-weight:700;color:var(--c-primary);white-space:nowrap}
.logo__text{letter-spacing:.01em}
.logo__dot{width:8px;height:8px;border-radius:50%;background:var(--c-accent);display:inline-block;margin-bottom:5px}
.searchbar{position:relative;flex:0 1 250px;margin-left:auto}
.searchbar svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--t-3)}
.searchbar input{width:100%;height:42px;border:1px solid var(--line-strong);border-radius:var(--r-btn);padding:0 14px 0 40px;font-size:14px;color:var(--t-1);background:#fff;transition:border-color .16s ease,box-shadow .16s ease}
.searchbar input::placeholder{color:var(--t-3)}
.searchbar input:focus{border-color:var(--c-primary);box-shadow:var(--focus);outline:none}
.brandbar__actions{display:flex;align-items:center;gap:18px}
.textlink{font-size:14px;color:var(--t-2)}
.textlink:hover{color:var(--c-primary)}
.menu-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--t-1);cursor:pointer}
.channelbar{border-top:1px solid var(--line);position:relative}
.channelbar__inner{display:flex;align-items:center}
.channels{display:flex;gap:28px;list-style:none;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;scroll-snap-type:x mandatory}
.channels::-webkit-scrollbar{display:none}
.channel{display:inline-flex;align-items:center;height:48px;padding:0 4px;font-size:15px;color:var(--t-2);border-bottom:2px solid transparent;white-space:nowrap;scroll-snap-align:start}
.channel:hover{color:var(--c-primary);background:var(--bg-plain)}
.channel.is-active{color:var(--c-primary);border-bottom-color:var(--c-primary);font-weight:600}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:all .18s ease;white-space:nowrap}
.btn--primary{background:var(--c-primary);color:#fff}
.btn--primary:hover{background:var(--c-primary-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{background:var(--c-primary-active);transform:none}
.btn--ghost{background:#fff;border-color:var(--line-strong);color:var(--c-primary)}
.btn--ghost:hover{border-color:var(--c-primary);background:var(--bg-plain);color:var(--c-primary);transform:translateY(-1px)}
.btn--sm{height:40px;padding:0 16px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

/* badges */
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12.5px;letter-spacing:.02em}
.badge--soft{background:rgba(0,183,154,.10);color:#00806C}
.badge--blue{background:var(--bg-plain);color:var(--c-primary)}
.badge--outline{background:#fff;border:1px solid var(--line);color:var(--t-2)}

/* breadcrumb */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--t-3);padding:20px 0 0}
.breadcrumb a{color:var(--c-primary)}
.breadcrumb .sep{color:var(--t-3)}
.breadcrumb .current{color:var(--t-3)}

/* article head */
.article-hero{padding:24px 0 0}
.article-hero__inner{max-width:880px}
.article-hero h1{font-size:40px;line-height:1.25;margin-top:16px;letter-spacing:.005em}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-top:20px;font-size:12.5px;color:var(--t-3)}
.article-meta__item{display:inline-flex;align-items:center;gap:6px}
.article-channel{margin-top:22px;display:inline-flex;align-items:center;gap:8px;font-size:14px}
.article-channel svg{color:var(--c-primary)}
.cover{margin-top:32px}
.cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-card);box-shadow:var(--sh-1)}
.cover figcaption{margin-top:10px;font-size:13px;color:var(--t-3)}

/* layout */
.article-section{padding:56px 0 88px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:56px}
.article-layout.has-toc{grid-template-columns:minmax(0,1fr) 260px}
.article-main{max-width:760px;min-width:0}
.article-main--center{margin:0 auto}

/* prose */
.article-body{font-size:17px;line-height:1.9;color:var(--t-1)}
.article-body p{margin:0 0 1.1em}
.article-body h2{position:relative;font-size:26px;line-height:1.35;margin:40px 0 16px;padding-left:16px;scroll-margin-top:110px}
.article-body h2::before{content:"";position:absolute;left:0;top:7px;width:4px;height:20px;border-radius:2px;background:var(--c-primary)}
.article-body h3{font-size:19px;line-height:1.5;margin:28px 0 12px;scroll-margin-top:110px}
.article-body h4{font-size:17px;margin:22px 0 10px}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:22px}
.article-body li{margin-bottom:8px}
.article-body ul{list-style:none;padding-left:20px}
.article-body ul li{position:relative}
.article-body ul li::before{content:"";position:absolute;left:-16px;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--c-primary)}
.article-body ol{list-style:decimal}
.article-body blockquote{margin:24px 0;padding:16px 22px;background:var(--bg-soft);border-left:3px solid var(--c-primary);border-radius:0 var(--r-img) var(--r-img) 0;color:var(--t-2)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{margin:24px auto;border-radius:var(--r-img);max-width:100%;height:auto}
.article-body a{text-decoration:underline;text-underline-offset:3px}
.article-body code{font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;font-size:15px;background:var(--bg-plain);color:var(--c-primary);padding:2px 8px;border-radius:6px}
.article-body pre{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--r-img);padding:16px 18px;overflow-x:auto}
.article-body pre code{background:none;padding:0;color:var(--t-1)}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:24px 0}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--bg-soft);font-weight:600}
.table-scroll{overflow-x:auto;margin:24px 0;border-radius:var(--r-img)}
.table-scroll table{margin:0;min-width:520px}
.article-body hr{border:none;border-top:1px solid var(--line);margin:36px 0}

/* toc */
.toc{position:sticky;top:112px;align-self:start;display:none}
.article-layout.has-toc .toc{display:block}
.toc__title{font-size:12.5px;letter-spacing:.02em;color:var(--t-3);margin-bottom:14px}
.toc__list{list-style:none;border-left:1px solid var(--line);padding-left:0}
.toc__item{margin:0}
.toc__link{display:block;padding:7px 0 7px 14px;font-size:14px;color:var(--t-2);border-left:2px solid transparent;margin-left:-1px;line-height:1.6}
.toc__link:hover{color:var(--c-primary);background:var(--bg-plain)}
.toc__link.is-active{color:var(--c-primary);border-left-color:var(--c-primary);font-weight:600}
.toc__item--h3 .toc__link{padding-left:26px;font-size:13.5px;color:var(--t-3)}

/* tags */
.article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:44px;padding-top:24px;border-top:1px solid var(--line)}
.article-tags__label{font-size:13px;color:var(--t-3);margin-right:4px}

/* prev/next */
.postnav{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:36px}
.postnav__card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px 24px;box-shadow:var(--sh-1);transition:all .18s ease}
.postnav__card:hover{border-color:var(--line-hover);box-shadow:var(--sh-2);transform:translateY(-2px)}
.postnav__label{display:block;font-size:12.5px;color:var(--t-3);margin-bottom:6px}
.postnav__title{display:block;font-size:16px;font-weight:600;color:var(--t-1);line-height:1.6}
.postnav__card--next{text-align:right}

/* related cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);transition:all .18s ease;display:flex;flex-direction:column}
.card:hover{border-color:var(--line-hover);box-shadow:var(--sh-2);transform:translateY(-2px)}
.card__cover{display:block;margin:-24px -24px 18px;border-radius:var(--r-card) var(--r-card) 0 0;overflow:hidden}
.card__cover img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0}
.card__title{font-size:18px;line-height:1.5}
.card__title a{color:var(--t-1)}
.card__title a:hover{color:var(--c-primary)}
.card__desc{margin-top:10px;font-size:14px;line-height:1.75;color:var(--t-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card__foot{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--t-3)}
.card__foot .read{display:inline-flex;align-items:center;gap:4px;color:var(--c-primary)}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}

/* back channel */
.back-channel{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:44px;padding:20px 24px;background:var(--bg-soft);border-radius:var(--r-card);border:1px solid var(--line)}
.back-channel__text{font-size:14px;color:var(--t-2)}
.back-channel__text strong{display:block;font-size:16px;color:var(--t-1);margin-bottom:4px}

/* cta */
.cta{background:var(--bg-soft);border-radius:var(--r-card);padding:44px 40px;display:flex;align-items:center;justify-content:space-between;gap:32px;border:1px solid var(--line)}
.cta h2{font-size:26px;line-height:1.35;position:relative;padding-left:16px}
.cta h2::before{content:"";position:absolute;left:0;top:8px;width:4px;height:20px;border-radius:2px;background:var(--c-primary)}
.cta p{margin-top:12px;padding-left:16px;color:var(--t-2);font-size:15px}
.cta__actions{display:flex;gap:14px;flex-wrap:wrap;flex-shrink:0}

/* empty */
.empty-state{text-align:center;padding:72px 24px;border:1px dashed var(--line-strong);border-radius:var(--r-card);background:#fff}
.empty-state svg{color:var(--line-hover);width:96px;height:96px}
.empty-state h2{margin-top:20px;font-size:20px;padding:0}
.empty-state h2::before{display:none}
.empty-state p{margin-top:10px;font-size:15px;color:var(--t-2)}
.empty-state .btn{margin-top:22px}

/* footer */
.site-footer{position:relative;background:var(--c-footer);color:#A8B3C7;margin-top:88px;padding-top:3px}
.site-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent))}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;padding:64px 0 44px}
.footer__brand .logo__text{display:inline-block;color:#fff;font-size:18px;font-weight:700;margin-bottom:14px}
.footer__brand p{font-size:14px;line-height:1.85;color:#A8B3C7;max-width:340px}
.footer h3{color:#fff;font-size:15px;margin-bottom:16px}
.footer__list{display:flex;flex-direction:column;gap:10px}
.footer__list a{color:#A8B3C7;font-size:14px}
.footer__list a:hover{color:#fff}
.footer__contact{display:flex;flex-direction:column;gap:10px;font-size:14px;color:#A8B3C7}
.footer__contact strong{color:#E3E9F5;font-weight:600}
.footer__contact a{color:#A8B3C7}
.footer__contact a:hover{color:#fff}
.footer__bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:#8A93A5}
.footer__bottom a{color:#8A93A5}
.footer__bottom a:hover{color:#fff}

/* drawer */
.drawer{position:fixed;inset:0;z-index:90;background:#fff;display:none;flex-direction:column;padding:12px 20px 24px}
.drawer.is-open{display:flex}
.drawer__head{display:flex;align-items:center;justify-content:space-between;height:56px}
.drawer__close{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--t-1);cursor:pointer}
.drawer__list{list-style:none;margin-top:8px}
.drawer__list a{display:flex;align-items:center;justify-content:space-between;height:52px;font-size:18px;color:var(--t-1);border-bottom:1px solid var(--line)}
.drawer__list a.is-active{color:var(--c-primary);font-weight:600}
.drawer__foot{margin-top:auto;padding-top:24px}

@media (max-width:1279px){
  .article-hero h1{font-size:34px}
}
@media (max-width:1023px){
  .article-layout.has-toc{grid-template-columns:minmax(0,1fr)}
  .toc{display:none !important}
  .article-main{max-width:760px;margin:0 auto}
  .footer__grid{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 32px}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta{flex-direction:column;align-items:flex-start}
}
@media (max-width:900px){
  .brandbar__actions .textlink{display:none}
}
@media (max-width:768px){
  body{font-size:15.5px;line-height:1.8}
  .container{padding:0 16px}
  .section{padding:48px 0}
  .section__title{font-size:24px}
  .section__head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:24px}
  .brandbar__inner{height:64px;gap:12px}
  .searchbar{display:none}
  .brandbar__actions{display:none}
  .menu-toggle{display:inline-flex;margin-left:auto}
  .channels{gap:22px;padding-right:40px}
  .channel{height:44px;font-size:14.5px}
  .channelbar__inner{position:relative}
  .article-hero h1{font-size:28px}
  .article-hero__inner{max-width:100%}
  .article-section{padding:36px 0 56px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:21px;margin:32px 0 14px}
  .article-body h3{font-size:17.5px;margin:24px 0 10px}
  .cover img{aspect-ratio:16/10;border-radius:var(--r-img)}
  .postnav{grid-template-columns:1fr;gap:16px}
  .postnav__card--next{text-align:left}
  .grid-3{grid-template-columns:1fr}
  .back-channel{flex-direction:column;align-items:flex-start}
  .cta{padding:28px 22px}
  .footer__grid{grid-template-columns:1fr;padding:40px 0 24px}
  .footer__bottom{flex-direction:column}
  .btn{height:44px}
}
@media (max-width:560px){
  .article-hero h1{font-size:24px}
  .brandbar__inner{height:60px}
  .logo{font-size:17px}
}

/* roulang page: category1 */
:root{
  --brand:#2F63E8;
  --brand-hover:#1E4FCB;
  --brand-active:#1740A8;
  --brand-soft:#F0F4FE;
  --brand-line:#C9D6F5;
  --teal:#00B79A;
  --teal-soft:rgba(0,183,154,.10);
  --warm:#FF7A45;
  --text:#1B2436;
  --text-2:#5A6577;
  --text-3:#8A93A5;
  --line:#E7ECF5;
  --line-2:#D8E0EE;
  --soft:#F5F8FD;
  --card:#FFFFFF;
  --footer-bg:#101B2E;
  --page:#F7F9FC;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,27,46,.04), 0 8px 24px rgba(16,27,46,.06);
  --sh-2:0 10px 28px rgba(16,27,46,.10);
  --sh-3:0 24px 60px rgba(16,27,46,.16);
  --focus:0 0 0 3px rgba(47,99,232,.28);
  --w:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-hover)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button,input{font:inherit;color:inherit}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:6px}
.container{max-width:var(--w);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line)}
.topbar__inner{
  display:flex;align-items:center;gap:24px;height:76px;transition:height .2s ease;
}
.logo{display:inline-flex;align-items:center;gap:8px;flex-shrink:0}
.logo__text{font-size:19px;font-weight:700;color:var(--brand);letter-spacing:.01em;white-space:nowrap}
.logo__dot{width:8px;height:8px;border-radius:50%;background:var(--teal);flex-shrink:0;margin-top:4px}
.topbar__tools{margin-left:auto;display:flex;align-items:center;gap:16px}
.search{position:relative;display:flex;align-items:center;width:250px}
.search svg{position:absolute;left:12px;width:18px;height:18px;color:var(--text-3);pointer-events:none}
.search input{
  width:100%;height:42px;padding:0 12px 0 38px;border:1px solid var(--line-2);
  border-radius:var(--r-input);background:#fff;font-size:14px;color:var(--text);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search input::placeholder{color:var(--text-3)}
.search input:focus{border-color:var(--brand);box-shadow:var(--focus);outline:none}
.toplink{font-size:14px;color:var(--text-2);white-space:nowrap;padding:8px 2px}
.toplink:hover{color:var(--brand)}
.menu-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line-2);border-radius:10px;
  background:#fff;align-items:center;justify-content:center;cursor:pointer;
}
.menu-toggle svg{width:22px;height:22px;color:var(--text)}
.site-header.is-scrolled .topbar__inner{height:60px}
.site-header.is-scrolled .search,
.site-header.is-scrolled .toplink{display:none}

.channelbar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.channelbar__inner{display:flex;align-items:center}
.channels{display:flex;align-items:center;gap:28px}
.channel{
  position:relative;display:inline-flex;align-items:center;height:52px;
  padding:0 10px;font-size:15px;color:var(--text-2);border-radius:8px;
  transition:background .18s ease,color .18s ease;
}
.channel:hover{background:var(--brand-soft);color:var(--brand)}
.channel.is-active{color:var(--brand);font-weight:600}
.channel.is-active::after{
  content:"";position:absolute;left:10px;right:10px;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
}

/* drawer */
.drawer{
  position:fixed;inset:0;background:#fff;z-index:80;display:none;flex-direction:column;
  padding:16px 0 24px;
}
.drawer.is-open{display:flex}
.drawer__head{display:flex;align-items:center;justify-content:space-between;padding:0 16px 12px;border-bottom:1px solid var(--line)}
.drawer__close{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line-2);border-radius:10px;background:#fff;cursor:pointer}
.drawer__close svg{width:22px;height:22px}
.drawer__list{padding:8px 16px}
.drawer__list a{
  display:flex;align-items:center;justify-content:space-between;height:52px;
  font-size:18px;color:var(--text);border-bottom:1px solid var(--line);
}
.drawer__list a svg{width:18px;height:18px;color:var(--text-3)}
.drawer__cta{margin:20px 16px 0}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(47,99,232,.22)}
.btn--primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(47,99,232,.28)}
.btn--primary:active{background:var(--brand-active);transform:none}
.btn--ghost{background:#fff;border-color:var(--line-2);color:var(--brand)}
.btn--ghost:hover{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-hover)}
.btn--sm{min-height:40px;padding:0 16px;font-size:14px;border-radius:8px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600}
.link-arrow svg{width:16px;height:16px;transition:transform .18s ease}
.link-arrow:hover svg{transform:translateX(3px)}

/* ---------- badges ---------- */
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);font-size:12.5px;letter-spacing:.02em;font-weight:600}
.badge--teal{background:var(--teal-soft);color:var(--teal)}
.badge--brand{background:var(--brand-soft);color:var(--brand)}

/* ---------- breadcrumb ---------- */
.crumb{padding:22px 0 0;font-size:12.5px;color:var(--text-3)}
.crumb a{color:var(--brand)}
.crumb span{margin:0 8px;color:var(--text-3)}
.crumb strong{font-weight:400;color:var(--text-3)}

/* ---------- hero ---------- */
.cat-hero{background:#fff;padding:34px 0 60px;border-bottom:1px solid var(--line)}
.cat-hero__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.cat-hero h1{font-size:clamp(28px,3.4vw,40px);line-height:1.25;font-weight:700;letter-spacing:-.01em}
.cat-hero__lead{margin-top:18px;font-size:16.5px;line-height:1.85;color:var(--text-2);max-width:560px}
.cat-hero__lead + .cat-hero__lead{margin-top:10px}
.cat-hero__acts{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.cat-hero__meta{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.cat-hero__fig{
  border-radius:16px;overflow:hidden;background:#F0F4FE;
  box-shadow:var(--sh-1);
}
.cat-hero__fig img{width:100%;aspect-ratio:5/4;object-fit:cover}

/* ---------- layout: toc + content ---------- */
.cat-main{padding:64px 0 88px}
.cat-layout{display:grid;grid-template-columns:240px 1fr;gap:48px;align-items:start}
.toc{position:sticky;top:140px}
.toc__title{font-size:13px;letter-spacing:.06em;color:var(--text-3);margin-bottom:12px;padding-left:14px}
.toc__list{border-left:1px solid var(--line)}
.toc__link{
  display:block;padding:9px 12px 9px 14px;margin-left:-1px;border-left:2px solid transparent;
  font-size:14px;color:var(--text-2);line-height:1.6;transition:all .18s ease;
}
.toc__link:hover{color:var(--brand);background:#F7F9FC}
.toc__link.is-active{color:var(--brand);font-weight:600;border-left-color:var(--brand);background:#F7F9FC}

.section{margin-bottom:76px;scroll-margin-top:150px}
.sec-head{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.sec-head::before{content:"";width:4px;height:20px;border-radius:2px;background:var(--brand);flex-shrink:0}
.sec-head h2{font-size:clamp(22px,2.2vw,28px);line-height:1.35;font-weight:700}
.sec-desc{color:var(--text-2);font-size:15.5px;margin-bottom:28px;max-width:760px}

/* steps */
.steps{position:relative;padding-left:4px}
.step{position:relative;display:grid;grid-template-columns:44px 1fr;gap:18px;padding-bottom:30px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:21px;top:46px;bottom:0;width:1px;background:var(--line);
}
.step:last-child::before{display:none}
.step__no{
  width:44px;height:44px;border-radius:50%;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;
  border:1px solid var(--brand-line);flex-shrink:0;
}
.step__body h3{font-size:18px;font-weight:700;line-height:1.45;margin-bottom:6px}
.step__body p{color:var(--text-2);font-size:15.5px}
.step__body p + p{margin-top:8px}

/* item list: icon + h3 + desc */
.items{display:grid;gap:2px;border-top:1px solid var(--line)}
.item{display:grid;grid-template-columns:44px 1fr;gap:18px;padding:22px 4px;border-bottom:1px solid var(--line);transition:background .18s ease}
.item:hover{background:#F7F9FC}
.item__ico{
  width:44px;height:44px;border-radius:12px;background:var(--teal-soft);color:var(--teal);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.item__ico svg{width:22px;height:22px}
.item__body h3{font-size:17px;font-weight:700;line-height:1.5;margin-bottom:6px}
.item__body p{color:var(--text-2);font-size:15px}

/* wide figure */
.wide{margin:8px 0 76px;scroll-margin-top:150px}
.wide__fig{border-radius:var(--r-img);overflow:hidden;background:#F0F4FE;box-shadow:var(--sh-1)}
.wide__fig img{width:100%;aspect-ratio:16/7;object-fit:cover}
.wide__cap{margin-top:12px;font-size:13px;color:var(--text-3);line-height:1.7}
.wide__body{margin-top:20px;display:grid;grid-template-columns:1fr 1fr;gap:22px}
.wide__body p{color:var(--text-2);font-size:15.5px}
.wide__body h3{font-size:17px;font-weight:700;margin-bottom:8px}

/* table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card);background:#fff;margin-top:26px}
table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:560px}
th,td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--soft);color:var(--text);font-weight:600;white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#F7F9FC}
td:first-child{color:var(--brand);font-weight:600;white-space:nowrap}

/* faq */
.faq{border:1px solid var(--line);border-radius:var(--r-card);background:#fff;margin-bottom:12px;box-shadow:var(--sh-1);overflow:hidden}
.faq.is-open{border-color:var(--brand-line)}
.faq__q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 20px;background:transparent;border:0;text-align:left;font-size:16px;font-weight:600;
  cursor:pointer;color:var(--text);
}
.faq__q:hover{color:var(--brand)}
.faq__icon{
  width:24px;height:24px;flex-shrink:0;position:relative;
  transition:transform .22s ease;color:var(--brand);
}
.faq.is-open .faq__icon{transform:rotate(45deg)}
.faq__icon svg{width:24px;height:24px;display:block}
.faq__a{display:none;padding:0 20px 20px;font-size:15.5px;line-height:1.8;color:var(--text-2)}
.faq.is-open .faq__a{display:block}

/* subscribe form */
.subscribe{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);margin-top:8px;
}
.subscribe h3{font-size:18px;font-weight:700;margin-bottom:6px}
.subscribe p{color:var(--text-2);font-size:15px;margin-bottom:18px}
.sub-form{display:flex;gap:12px;align-items:flex-start;flex-wrap:wrap}
.field{flex:1 1 260px;min-width:220px}
.field label{display:block;font-size:14px;color:var(--text-2);margin-bottom:6px}
.field input{
  width:100%;height:46px;padding:0 14px;border:1px solid var(--line-2);
  border-radius:var(--r-input);background:#fff;font-size:15px;transition:border-color .18s ease,box-shadow .18s ease;
}
.field input:focus{border-color:var(--brand);box-shadow:var(--focus);outline:none}
.field input::placeholder{color:var(--text-3)}
.form-note{font-size:13px;color:var(--text-3);margin-top:12px}

/* cta strip */
.cta-strip{
  background:var(--soft);border:1px solid var(--line);border-radius:var(--r-card);
  padding:36px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.cta-strip h3{font-size:20px;font-weight:700;margin-bottom:6px}
.cta-strip p{color:var(--text-2);font-size:15px;max-width:620px}
.cta-strip__acts{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--footer-bg);color:#C6CFE0;margin-top:0;position:relative}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--brand),var(--teal));
}
.footer__grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:64px 24px 40px;
}
.footer__brand .logo__text{font-size:18px;color:#fff}
.footer__brand p{margin-top:14px;font-size:14px;line-height:1.85;color:#93A0B7;max-width:340px}
.footer h3{font-size:15px;color:#fff;font-weight:600;margin-bottom:16px}
.footer__list{display:flex;flex-direction:column;gap:11px}
.footer__list a{font-size:14px;color:#93A0B7}
.footer__list a:hover{color:#fff}
.footer__contact{display:flex;flex-direction:column;gap:11px;font-size:14px;color:#93A0B7}
.footer__contact a{color:#93A0B7}
.footer__contact a:hover{color:#fff}
.footer__contact strong{color:#DCE3F0;font-weight:600}
.footer__bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 24px 28px;border-top:1px solid rgba(255,255,255,.08);font-size:13px;color:#8291AB;
}
.footer__bottom a{color:#8291AB}
.footer__bottom a:hover{color:#fff}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .cat-hero__grid{gap:36px}
}
@media (max-width:1023px){
  .cat-hero__grid{grid-template-columns:1fr;gap:28px}
  .cat-hero__fig img{aspect-ratio:16/9}
  .cat-layout{grid-template-columns:1fr;gap:28px}
  .toc{position:static;top:auto}
  .toc__list{border-left:0;display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
  .toc__list::-webkit-scrollbar{display:none}
  .toc__link{
    white-space:nowrap;border:1px solid var(--line);border-radius:var(--r-pill);
    padding:8px 16px;margin-left:0;background:#fff;
  }
  .toc__link.is-active{border-color:var(--brand);background:var(--brand-soft)}
  .wide__body{grid-template-columns:1fr;gap:16px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 24px 32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .search{display:none}
  .toplink{display:none}
  .menu-toggle{display:flex}
  .channels{
    gap:8px;overflow-x:auto;scroll-snap-type:x proximity;
    scrollbar-width:none;-webkit-overflow-scrolling:touch;
    mask-image:linear-gradient(90deg,#000 88%,transparent);
  }
  .channels::-webkit-scrollbar{display:none}
  .channels li{scroll-snap-align:start}
  .channel{height:48px;padding:0 12px;font-size:14.5px}
  .cat-hero{padding:20px 0 40px}
  .cat-hero__fig img{aspect-ratio:16/10}
  .cat-hero__acts .btn{flex:1 1 auto}
  .cat-main{padding:44px 0 64px}
  .section{margin-bottom:56px}
  .wide{margin-bottom:56px}
  .step{grid-template-columns:38px 1fr;gap:14px;padding-bottom:24px}
  .step__no{width:38px;height:38px;font-size:15px}
  .step::before{left:18px;top:40px}
  .item{grid-template-columns:38px 1fr;gap:14px;padding:18px 2px}
  .item__ico{width:38px;height:38px;border-radius:10px}
  .cta-strip{padding:26px 20px;flex-direction:column;align-items:flex-start}
  .cta-strip__acts{width:100%}
  .cta-strip__acts .btn{flex:1 1 auto}
  .subscribe{padding:22px 18px}
  .footer__grid{grid-template-columns:1fr;gap:28px;padding:44px 16px 28px}
  .footer__bottom{padding:18px 16px 24px}
}
@media (max-width:519px){
  .logo__text{font-size:17px}
  .cat-hero h1{font-size:26px}
  .btn{width:100%}
  .cat-hero__acts{flex-direction:column;align-items:stretch}
  .cta-strip__acts{flex-direction:column}
}

/* roulang page: category2 */
:root{
  --brand:#2F63E8;
  --brand-hover:#1E4FCB;
  --brand-active:#1740A8;
  --accent:#00B79A;
  --warn:#FF7A45;
  --ink:#1B2436;
  --ink2:#5A6577;
  --ink3:#8A93A5;
  --line:#E7ECF5;
  --soft:#F5F8FD;
  --bg:#F7F9FC;
  --card:#FFFFFF;
  --deep:#101B2E;
  --ring:0 0 0 3px rgba(47,99,232,.28);
  --sh1:0 1px 2px rgba(16,27,46,.04),0 8px 24px rgba(16,27,46,.06);
  --sh2:0 10px 28px rgba(16,27,46,.10);
  --sh3:0 24px 60px rgba(16,27,46,.16);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-hover)}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:none;box-shadow:var(--ring);border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 顶部进度条 ---------- */
.progress{position:fixed;top:0;left:0;right:0;height:2px;background:transparent;z-index:120}
.progress__bar{height:100%;width:100%;background:var(--brand);transform:scaleX(0);transform-origin:0 50%;transition:transform .12s linear}

/* ---------- 头部 ---------- */
.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line)}
.header__brand{display:flex;align-items:center;gap:22px;height:78px;transition:height .2s ease}
.site-header.is-scrolled .header__brand{height:60px}
.logo{display:inline-flex;align-items:center;font-weight:700;color:var(--brand);flex:none}
.logo__text{font-size:20px;letter-spacing:.01em;line-height:1.2}
.logo__dot{width:8px;height:8px;border-radius:50%;background:var(--accent);margin-left:7px;display:inline-block}
.search{position:relative;margin-left:auto;width:248px;flex:none}
.search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--ink3);pointer-events:none}
.search input{
  width:100%;height:42px;border:1px solid #D8E0EE;border-radius:10px;
  padding:0 12px 0 38px;color:var(--ink);background:#fff;transition:border-color .16s,box-shadow .16s;
}
.search input::placeholder{color:var(--ink3)}
.search input:focus{border-color:var(--brand);box-shadow:var(--ring);outline:none}
.header__meta{display:flex;align-items:center;gap:18px;flex:none}
.link-quiet{font-size:15px;color:var(--ink2);padding:8px 2px;height:44px;display:inline-flex;align-items:center}
.link-quiet:hover{color:var(--brand)}
.hamburger{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  align-items:center;justify-content:center;color:var(--ink);flex:none;background:#fff;
}
.hamburger:hover{background:var(--soft);color:var(--brand)}

/* ---------- 频道导航 ---------- */
.channelbar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.channelbar__inner{display:flex;align-items:center}
.channels{display:flex;align-items:center;gap:28px;overflow:visible}
.channel{
  display:inline-flex;align-items:center;height:52px;font-size:15px;color:var(--ink2);
  position:relative;padding:0 2px;transition:color .16s,background-color .16s;border-radius:8px;
}
.channel:hover{color:var(--brand);background:#F0F4FE}
.channel.is-active{color:var(--brand);font-weight:600}
.channel.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--brand);border-radius:2px;
}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;inset:0;background:#fff;z-index:200;display:none;flex-direction:column;
  padding:16px 20px 32px;
}
.drawer.is-open{display:flex}
.drawer__head{display:flex;align-items:center;justify-content:space-between;height:56px;border-bottom:1px solid var(--line)}
.drawer__close{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;color:var(--ink)}
.drawer__close:hover{background:var(--soft)}
.drawer__list{margin-top:12px}
.drawer__list a{
  display:flex;align-items:center;justify-content:space-between;height:52px;font-size:18px;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer__list a:hover{color:var(--brand)}
.drawer__list a.is-active{color:var(--brand);font-weight:600}
.drawer__note{margin-top:22px;font-size:14px;color:var(--ink3)}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15.5px;font-weight:600;
  transition:background-color .16s,color .16s,border-color .16s,transform .16s,box-shadow .16s;
  border:1px solid transparent;white-space:nowrap;
}
.btn--sm{height:40px;padding:0 16px;font-size:14.5px}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh1)}
.btn--primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh2)}
.btn--primary:active{background:var(--brand-active);transform:none;box-shadow:var(--sh1)}
.btn--ghost{background:#fff;color:var(--brand);border-color:#D8E0EE}
.btn--ghost:hover{background:#F0F4FE;border-color:var(--brand);color:var(--brand-hover)}
.btn--ghost:active{border-color:var(--brand-active);color:var(--brand-active)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn--text{height:auto;padding:4px 0;color:var(--brand);font-weight:600}
.btn--text svg{transition:transform .16s}
.btn--text:hover svg{transform:translateX(3px)}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  font-size:12.5px;letter-spacing:.02em;color:var(--ink3);margin-bottom:18px;
}
.breadcrumb a{color:var(--brand)}
.breadcrumb span.sep{color:var(--ink3)}
.breadcrumb .current{color:var(--ink3)}

/* ---------- Hero ---------- */
.hero{background:#fff;padding:44px 0 64px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(#E7ECF5 1px,transparent 1px);
  background-size:18px 18px;opacity:.12;pointer-events:none;
}
.hero__grid{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,480px);gap:56px;align-items:center}
.hero h1{font-size:44px;line-height:1.2;letter-spacing:-.01em;margin-bottom:20px}
.hero__lead{font-size:16px;line-height:1.85;color:var(--ink2);margin-bottom:12px;max-width:620px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero__media img{
  width:100%;aspect-ratio:5/4;object-fit:cover;border-radius:16px;background:#F0F4FE;
  box-shadow:0 18px 48px rgba(16,27,46,.14);
}

/* ---------- 双栏布局 ---------- */
.layout{
  display:grid;grid-template-columns:240px minmax(0,1fr);gap:48px;
  padding:72px 0 88px;align-items:start;
}
.toc{position:sticky;top:132px}
.toc__title{font-size:12.5px;letter-spacing:.06em;color:var(--ink3);margin-bottom:14px}
.toc__list{display:flex;flex-direction:column;border-left:1px solid var(--line)}
.toc__list a{
  display:block;padding:9px 0 9px 16px;font-size:14.5px;color:var(--ink2);
  border-left:2px solid transparent;margin-left:-1px;transition:color .16s,border-color .16s;
}
.toc__list a:hover{color:var(--brand);border-left-color:#C9D6F5}
.toc__list a.is-active{color:var(--brand);border-left-color:var(--brand);font-weight:600}
.toc__aside{
  margin-top:28px;padding:18px;background:var(--soft);border-radius:var(--r-card);
  border:1px solid var(--line);
}
.toc__aside p{font-size:13.5px;line-height:1.75;color:var(--ink2);margin-bottom:12px}

/* ---------- 内容流 ---------- */
.section-block{padding-bottom:56px;margin-bottom:56px;border-bottom:1px solid var(--line)}
.section-block:last-of-type{border-bottom:0;margin-bottom:0;padding-bottom:16px}
.section-block h2{
  font-size:30px;line-height:1.3;position:relative;padding-left:16px;margin-bottom:16px;
  scroll-margin-top:132px;
}
.section-block h2::before{
  content:"";position:absolute;left:0;top:.28em;width:4px;height:20px;border-radius:2px;background:var(--brand);
}
.section-intro{font-size:16px;color:var(--ink2);margin-bottom:26px;max-width:760px}

.entry{display:flex;gap:14px;padding:16px 0;border-bottom:1px dashed var(--line)}
.entry:last-child{border-bottom:0}
.entry__icon{
  width:40px;height:40px;flex:none;border-radius:50%;background:#F0F4FE;color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;
}
.entry__icon.is-accent{background:rgba(0,183,154,.10);color:var(--accent)}
.entry__body h3{font-size:20px;line-height:1.4;margin-bottom:6px}
.entry__body p{font-size:15.5px;line-height:1.85;color:var(--ink2)}

.figure-block{margin:32px 0}
.figure-block img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img);background:#F0F4FE;
}
.figure-block figcaption{font-size:13px;color:var(--ink3);margin-top:10px;line-height:1.7}

/* ---------- 对照卡 ---------- */
.compare{
  display:grid;grid-template-columns:1fr 1fr;margin:26px 0 8px;
  border:1px solid var(--line);border-radius:var(--r-card);background:#fff;overflow:hidden;
}
.compare__col{padding:24px}
.compare__col:first-child{border-right:1px solid var(--line)}
.compare__col h4{font-size:17px;margin:12px 0 10px}
.compare__list li{
  position:relative;padding-left:22px;font-size:15px;line-height:1.8;color:var(--ink2);margin-bottom:8px;
}
.compare__list li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;background:var(--brand);
}
.compare__col:last-child .compare__list li::before{background:var(--accent)}
.compare__note{font-size:13px;color:var(--ink3);margin-top:6px}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12.5px;letter-spacing:.02em;font-weight:600;
}
.badge--accent{background:rgba(0,183,154,.10);color:#009C84}
.badge--soft{background:#F0F4FE;color:var(--brand)}

/* ---------- FAQ ---------- */
.faq{border:1px solid var(--line);border-radius:var(--r-card);background:#fff;overflow:hidden}
.faq__item{border-bottom:1px solid var(--line)}
.faq__item:last-child{border-bottom:0}
.faq__item summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 20px;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;
}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary:hover{background:#F7F9FC}
.faq__icon{
  position:relative;width:22px;height:22px;flex:none;border-radius:50%;background:#F0F4FE;
  transition:transform .2s ease;
}
.faq__icon::before,.faq__icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.faq__icon::before{left:6px;right:6px;top:10px;height:2px}
.faq__icon::after{top:6px;bottom:6px;left:10px;width:2px}
.faq__item[open] .faq__icon{transform:rotate(45deg);background:rgba(0,183,154,.12)}
.faq__item[open] .faq__icon::before,.faq__item[open] .faq__icon::after{background:var(--accent)}
.faq__body{padding:0 20px 20px;font-size:15.5px;line-height:1.8;color:var(--ink2)}

/* ---------- 疑问引导条 + 表单 ---------- */
.cta-strip{
  background:var(--soft);border:1px solid var(--line);border-radius:var(--r-card);
  padding:32px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,420px);gap:32px;align-items:center;
  margin-top:56px;
}
.cta-strip h3{font-size:20px;line-height:1.4;margin-bottom:8px}
.cta-strip p{font-size:15px;color:var(--ink2)}
.form__row{display:flex;gap:10px}
.form__field{flex:1;min-width:0}
.form__label{display:block;font-size:14px;color:var(--ink2);margin-bottom:8px}
.form__input{
  width:100%;height:46px;border:1px solid #D8E0EE;border-radius:10px;padding:0 14px;
  color:var(--ink);background:#fff;transition:border-color .16s,box-shadow .16s;
}
.form__input::placeholder{color:var(--ink3)}
.form__input:focus{border-color:var(--brand);box-shadow:var(--ring);outline:none}
.form__hint{font-size:13px;color:var(--ink3);margin-top:10px}
.form__hint.is-error{color:#E5484D}
.form__hint.is-success{color:#009C84}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--deep);color:#C6CFE0;margin-top:0;border-top:3px solid transparent;background-image:linear-gradient(var(--deep),var(--deep)),linear-gradient(90deg,var(--brand),var(--accent));background-origin:border-box;background-clip:padding-box,border-box}
.footer__grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:64px 24px 40px;
}
.footer__brand .logo__text{color:#fff;font-size:19px;display:inline-block;margin-bottom:14px}
.footer__brand p{font-size:14px;line-height:1.85;color:#93A0B8;max-width:340px}
.footer h3{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer__list{display:flex;flex-direction:column;gap:10px}
.footer__list a{font-size:14px;color:#A9B5C9;transition:color .16s}
.footer__list a:hover{color:#fff}
.footer__contact{display:flex;flex-direction:column;gap:12px;font-size:14px;color:#A9B5C9}
.footer__contact a{color:#A9B5C9}
.footer__contact a:hover{color:#fff}
.footer__contact strong{color:#DCE3F0;font-weight:600}
.footer__bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  border-top:1px solid rgba(255,255,255,.10);padding-top:22px;padding-bottom:32px;
  font-size:13px;color:#8A93A5;
}
.footer__bottom a{color:#A9B5C9}
.footer__bottom a:hover{color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero__grid{grid-template-columns:minmax(0,1fr) minmax(0,420px);gap:40px}
}
@media (max-width:1023px){
  .hero__grid{grid-template-columns:1fr;gap:32px}
  .hero__media img{aspect-ratio:16/9}
  .layout{grid-template-columns:1fr;gap:0;padding-top:36px}
  .toc{position:sticky;top:60px;background:#fff;z-index:20;padding:12px 0;border-bottom:1px solid var(--line);margin-bottom:24px}
  .toc__title{display:none}
  .toc__list{
    flex-direction:row;gap:10px;overflow-x:auto;scroll-snap-type:x mandatory;
    border-left:0;-webkit-overflow-scrolling:touch;scrollbar-width:none;
    -webkit-mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 40px),transparent 100%);
    mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 40px),transparent 100%);
  }
  .toc__list::-webkit-scrollbar{display:none}
  .toc__list a{
    flex:none;scroll-snap-align:start;padding:8px 14px;border:1px solid var(--line);border-radius:999px;
    margin-left:0;background:#fff;
  }
  .toc__list a.is-active{border-color:var(--brand);background:#F0F4FE}
  .toc__aside{display:none}
  .search{width:200px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;padding-top:48px}
}
@media (max-width:767px){
  body{font-size:15.5px;line-height:1.8}
  .container{padding:0 16px}
  .header__brand{height:64px;gap:14px}
  .search{display:none}
  .header__meta .link-quiet{display:none}
  .hamburger{display:inline-flex}
  .channelbar__inner{padding:0 16px}
  .channels{gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;
    -webkit-mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 36px),transparent 100%);
    mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 36px),transparent 100%);
  }
  .channels::-webkit-scrollbar{display:none}
  .channels li{scroll-snap-align:start}
  .channel{height:48px;font-size:14.5px}
  .hero{padding:28px 0 40px}
  .hero h1{font-size:32px}
  .hero__media img{aspect-ratio:16/10}
  .layout{padding:24px 0 56px}
  .section-block{padding-bottom:40px;margin-bottom:40px}
  .section-block h2{font-size:24px;scroll-margin-top:120px}
  .compare{grid-template-columns:1fr}
  .compare__col:first-child{border-right:0;border-bottom:1px solid var(--line)}
  .entry__body h3{font-size:18px}
  .figure-block img{aspect-ratio:16/10}
  .cta-strip{grid-template-columns:1fr;padding:24px;gap:22px;margin-top:40px}
  .cta-strip h3{font-size:18px}
  .form__row{flex-wrap:wrap}
  .form__row .btn{width:100%}
  .footer__grid{grid-template-columns:1fr;gap:28px;padding:44px 16px 28px}
  .footer__bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:559px){
  .hero h1{font-size:28px}
  .hero__actions .btn{width:100%}
  .section-block h2{font-size:22px}
  .faq__item summary{font-size:15px;padding:14px 16px}
  .faq__body{padding:0 16px 18px;font-size:15px}
  .compare__col{padding:20px}
}