/* roulang page: index */
:root{
  --brand:#1C6E8C;
  --brand-deep:#14566F;
  --brand-soft:#E7F1F5;
  --accent:#3E8E6E;
  --accent-soft:#E8F3EE;
  --spark:#C8894A;
  --ink:#1F2D35;
  --ink-2:#5A6B75;
  --ink-3:#8A9AA3;
  --bg:#F6F8F9;
  --card:#FFFFFF;
  --line:#E2E8EC;
  --ok:#2E8B57;
  --warn:#C8894A;
  --err:#C0483E;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,42,58,.05);
  --sh-2:0 10px 28px rgba(16,42,58,.09);
  --sidebar-w:248px;
  --font:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,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:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
body.is-locked{overflow:hidden;}
img{display:block;max-width:100%;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .16s ease;}
a:hover{color:var(--brand-deep);}
button{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--ink);}
h1{font-size:44px;line-height:1.25;letter-spacing:-0.5px;}
h2{font-size:30px;line-height:1.35;}
h3{font-size:20px;line-height:1.45;}
h4{font-size:17px;line-height:1.5;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
figure{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.skip{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;border-radius:0 0 var(--r-sm) 0;z-index:200;}
.skip:focus{left:0;color:#fff;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px;}

/* ============ 移动端顶栏 ============ */
.topbar{display:none;}
.scrim{
  position:fixed;inset:0;background:rgba(10,25,35,.45);
  opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s ease;z-index:55;
}
.scrim.is-open{opacity:1;visibility:visible;}

/* ============ 左侧竖向导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  height:100vh;background:var(--card);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:20px 16px 22px;
  overflow-y:auto;z-index:60;
}
.sidebar::before{
  content:"";position:absolute;left:0;top:26px;width:3px;height:96px;
  background:linear-gradient(180deg,var(--brand),rgba(28,110,140,0));
  border-radius:0 3px 3px 0;
}
.brand{
  display:flex;align-items:center;gap:10px;min-height:56px;
  padding:0 8px 16px;border-bottom:1px solid var(--line);margin-bottom:16px;
}
.brand__mark{
  position:relative;flex:0 0 auto;width:40px;height:40px;border-radius:12px;
  background:var(--brand);color:#fff;display:grid;place-items:center;
  font-size:16px;font-weight:700;letter-spacing:.5px;
}
.brand__mark::after{
  content:"";position:absolute;left:8px;right:8px;top:11px;height:2px;
  background:rgba(255,255,255,.6);border-radius:2px;
}
.brand__mark::before{
  content:"";position:absolute;left:11px;right:11px;bottom:10px;height:11px;
  border-left:2px solid rgba(255,255,255,.55);border-right:2px solid rgba(255,255,255,.55);
  border-bottom:2px solid rgba(255,255,255,.55);border-radius:0 0 4px 4px;
}
.brand__text{font-size:17px;font-weight:700;line-height:1.3;color:var(--ink);}
.brand__text small{display:block;font-size:12px;font-weight:500;color:var(--ink-3);letter-spacing:.2px;}
.nav{display:flex;flex-direction:column;gap:4px;}
.nav__label{font-size:12px;font-weight:500;color:var(--ink-3);padding:4px 12px 8px;}
.nav__item{
  position:relative;display:flex;align-items:center;gap:10px;height:44px;
  padding:0 12px;border-radius:var(--r-md);font-size:15px;font-weight:500;
  color:var(--ink-2);transition:background .18s ease,color .18s ease;
}
.nav__item svg{width:18px;height:18px;flex:0 0 auto;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.nav__item:hover{background:var(--brand-soft);color:var(--brand);}
.nav__item.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600;}
.nav__item.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:3px;background:var(--brand);
}
.sidebar__cta{margin-top:18px;width:100%;}
.sidebar__meta{
  margin-top:auto;padding-top:18px;border-top:1px solid var(--line);
  font-size:13px;line-height:2;color:var(--ink-3);
}
.sidebar__meta strong{display:block;color:var(--ink-2);font-weight:600;font-size:13px;margin-bottom:4px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;border:1.5px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:background .16s ease,color .16s ease,transform .16s ease,box-shadow .16s ease,border-color .16s ease;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1);}
.btn--primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn--primary:active{transform:translateY(0);}
.btn--ghost{background:var(--card);border-color:var(--brand);color:var(--brand);}
.btn--ghost:hover{background:var(--brand-soft);color:var(--brand-deep);}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn:disabled{opacity:.5;cursor:not-allowed;}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);
  border-bottom:1px solid transparent;transition:border-color .16s ease,color .16s ease;
}
.link-more:hover{color:var(--brand-deep);border-bottom-color:var(--brand-deep);}

/* ============ 徽章与标签 ============ */
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;font-weight:500;
  background:var(--brand-soft);color:var(--brand-deep);white-space:nowrap;
}
.badge--accent{background:var(--accent-soft);color:#2C6B51;}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;
  border-radius:var(--r-pill);font-size:13px;font-weight:500;
  background:var(--card);border:1px solid var(--line);color:var(--ink-2);
}

/* ============ 主内容区 ============ */
.main{margin-left:var(--sidebar-w);min-height:100vh;}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background:linear-gradient(100deg,var(--bg) 0%,var(--brand-soft) 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(28,110,140,.14) 1px,transparent 1px);
  background-size:18px 18px;opacity:.35;
}
.hero__grid{
  position:relative;z-index:1;display:grid;grid-template-columns:55fr 45fr;
  gap:40px;align-items:center;padding-top:76px;padding-bottom:68px;
}
.hero__eyebrow{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;}
.hero h1{max-width:16em;}
.hero__sub{
  margin-top:18px;font-size:17px;line-height:1.8;color:var(--ink-2);max-width:34em;
}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.trustbar{display:flex;flex-wrap:wrap;margin-top:30px;}
.trustbar li{
  padding:0 16px;font-size:14px;color:var(--ink-2);line-height:1.6;
  border-left:1px solid var(--line);
}
.trustbar li:first-child{padding-left:0;border-left:0;}
.hero__media{position:relative;}
.hero__media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--sh-2);
}
.hero__media figcaption{
  margin-top:12px;font-size:13px;color:var(--ink-3);text-align:center;
}

/* ============ 板块 ============ */
.section{padding:88px 0;}
.section--alt{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section--tight{padding-top:64px;padding-bottom:64px;}
.section__head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:20px;margin-bottom:38px;flex-wrap:wrap;
}
.section__title{position:relative;padding-left:16px;}
.section__title::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;
  border-radius:3px;background:var(--brand);
}
.section__desc{margin-top:12px;font-size:15px;color:var(--ink-2);max-width:44em;line-height:1.75;}

/* ============ 确认事项 图文块 ============ */
.checkblock{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;}
.checkblock__media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--sh-1);
}
.checkblock__media figcaption{margin-top:12px;font-size:13px;color:var(--ink-3);}
.checklist{display:flex;flex-direction:column;gap:10px;margin-top:24px;}
.checklist li{
  display:flex;gap:14px;padding:18px 20px;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-md);
  transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.checklist li:hover{border-color:rgba(28,110,140,.32);box-shadow:var(--sh-1);transform:translateY(-1px);}
.checklist__ico{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  background:var(--accent-soft);color:var(--accent);
  display:grid;place-items:center;font-size:13px;font-weight:700;margin-top:3px;
}
.checklist h3{font-size:17px;margin-bottom:4px;}
.checklist p{font-size:15px;color:var(--ink-2);line-height:1.75;}

/* ============ 三步上手 ============ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);}
.step{position:relative;padding:0 28px;}
.step:first-child{padding-left:0;}
.step:last-child{padding-right:0;}
.step + .step{border-left:1px solid var(--line);}
.step__num{
  width:46px;height:46px;border-radius:var(--r-pill);
  background:var(--card);border:1px solid var(--line);color:var(--spark);
  display:grid;place-items:center;font-size:16px;font-weight:700;
  font-variant-numeric:tabular-nums;margin-bottom:18px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.step:hover .step__num{border-color:rgba(200,137,74,.5);box-shadow:var(--sh-1);}
.step h3{margin-bottom:10px;}
.step p{font-size:15px;color:var(--ink-2);line-height:1.78;min-height:52px;}
.step__tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.step__tags span{
  font-size:12px;padding:3px 10px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-deep);
}
.steps__note{
  margin-top:38px;padding:18px 22px;border-radius:var(--r-md);
  background:var(--accent-soft);color:#2C6B51;font-size:15px;line-height:1.75;
  border-left:3px solid var(--accent);
}

/* ============ 最新信息列表 ============ */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.news-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.news-card:hover{
  border-color:rgba(28,110,140,.35);box-shadow:var(--sh-2);transform:translateY(-2px);
}
.news-card__link{display:block;height:100%;color:inherit;}
.news-card__link:hover{color:inherit;}
.news-card__thumb{aspect-ratio:16/9;overflow:hidden;background:var(--brand-soft);}
.news-card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.news-card:hover .news-card__thumb img{transform:scale(1.04);}
.news-card__body{padding:24px;display:flex;flex-direction:column;gap:12px;height:100%;}
.news-card__title{
  font-size:20px;line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__summary{
  font-size:15px;line-height:1.75;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__meta{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--ink-3);
}
.news-card__more{color:var(--brand);font-weight:600;font-size:13px;}
.news-card--lead{grid-column:1 / -1;}
.news-card--lead .news-card__link{display:grid;grid-template-columns:1.05fr 1fr;}
.news-card--lead .news-card__thumb{aspect-ratio:auto;height:100%;min-height:280px;}
.news-card--lead .news-card__body{padding:32px;}
.news-card--lead .news-card__title{font-size:24px;-webkit-line-clamp:3;}
.empty{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:12px;background:var(--card);border:1px dashed var(--line);
  border-radius:var(--r-lg);text-align:center;padding:32px;
}
.empty svg{width:26px;height:26px;stroke:var(--brand);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.empty p{color:var(--ink-2);font-size:15px;}

/* ============ 案例证明 ============ */
.case{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:start;}
.case__media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--sh-1);
}
.case__media figcaption{margin-top:12px;font-size:13px;color:var(--ink-3);}
.quote{
  background:var(--brand-soft);border-left:3px solid var(--brand);
  border-radius:0 var(--r-md) var(--r-md) 0;padding:28px 26px;
}
.quote p{font-size:18px;line-height:1.75;color:var(--ink);}
.quote footer{margin-top:16px;font-size:13px;color:var(--ink-3);}
.case-stats{display:flex;gap:48px;margin-top:36px;flex-wrap:wrap;}
.case-stats div{min-width:120px;}
.case-stats strong{
  display:block;font-size:30px;font-weight:700;color:var(--spark);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.case-stats span{font-size:13px;color:var(--ink-2);}

/* ============ FAQ ============ */
.faq{max-width:860px;margin:0 auto;border-top:1px solid var(--line);}
.faq__item{border-bottom:1px solid var(--line);}
.faq__q{
  width:100%;min-height:56px;background:none;border:0;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 0;text-align:left;font-size:16px;font-weight:600;color:var(--ink);
  transition:color .18s ease;
}
.faq__q:hover{color:var(--brand);}
.faq__item.is-open .faq__q{color:var(--brand);}
.faq__sign{position:relative;flex:0 0 auto;width:20px;height:20px;}
.faq__sign::before,.faq__sign::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);
  border-radius:2px;transform:translate(-50%,-50%);
  transition:transform .2s ease,opacity .2s ease;
}
.faq__sign::before{width:14px;height:2px;}
.faq__sign::after{width:2px;height:14px;}
.faq__item.is-open .faq__sign::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq__a{max-height:0;overflow:hidden;transition:max-height .26s ease;}
.faq__a p{padding-bottom:20px;font-size:15px;line-height:1.8;color:var(--ink-2);max-width:44em;}

/* ============ CTA ============ */
.cta{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  background:var(--brand-soft);border:1px solid rgba(28,110,140,.18);
  border-radius:var(--r-lg);padding:40px 44px;
}
.cta__copy h2{font-size:26px;line-height:1.4;}
.cta__copy p{margin-top:10px;font-size:15px;color:var(--ink-2);}
.cta__actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.footer{background:#16262E;color:#C7D2D8;padding:64px 0 0;font-size:15px;line-height:1.8;}
.footer a{color:#C7D2D8;}
.footer a:hover{color:#fff;}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer__mark{
  width:36px;height:36px;border-radius:10px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-size:15px;font-weight:700;flex:0 0 auto;
}
.footer__name{font-size:17px;font-weight:700;color:#fff;line-height:1.3;}
.footer__desc{font-size:14px;color:#9FB0B8;max-width:32em;}
.footer h3{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.footer li{margin-bottom:10px;font-size:14px;}
.footer__contact li{color:#9FB0B8;}
.footer__bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.14);
  padding:20px 0 24px;display:flex;justify-content:space-between;
  align-items:center;gap:12px;flex-wrap:wrap;font-size:14px;color:#9FB0B8;
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .topbar{
    display:flex;position:sticky;top:0;z-index:50;height:56px;
    align-items:center;justify-content:space-between;
    padding:0 16px;background:var(--card);border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease;
  }
  .topbar.is-scrolled{box-shadow:0 2px 12px rgba(16,42,58,.06);}
  .topbar__brand{display:flex;align-items:center;gap:9px;}
  .topbar__mark{
    width:32px;height:32px;border-radius:9px;background:var(--brand);color:#fff;
    display:grid;place-items:center;font-size:13px;font-weight:700;
  }
  .topbar__name{font-size:15px;font-weight:700;color:var(--ink);}
  .burger{
    width:44px;height:44px;border:0;background:none;cursor:pointer;
    display:grid;place-items:center;gap:5px;padding:0;
  }
  .burger span{
    display:block;width:20px;height:2px;border-radius:2px;background:var(--ink);
    transition:transform .2s ease,opacity .2s ease;
  }
  .burger[aria-expanded="true"] span:nth-child(1){transform:translateY(3.5px) rotate(45deg);}
  .burger[aria-expanded="true"] span:nth-child(2){transform:translateY(-3.5px) rotate(-45deg);}
  .sidebar{
    width:280px;max-width:88vw;transform:translateX(-100%);
    transition:transform .22s ease-out;box-shadow:none;
  }
  .sidebar.is-open{transform:translateX(0);box-shadow:var(--sh-2);}
  .main{margin-left:0;}
  .hero__grid{grid-template-columns:1fr;gap:32px;padding-top:48px;padding-bottom:48px;}
  .hero__media{order:2;}
  h1{font-size:32px;}
  h2{font-size:26px;}
  .section{padding:64px 0;}
  .section--tight{padding-top:48px;padding-bottom:48px;}
  .checkblock{grid-template-columns:1fr;gap:28px;}
  .steps{grid-template-columns:1fr;}
  .step{padding:0 0 26px 30px;border-left:1px solid var(--line);}
  .step:first-child{padding-left:30px;}
  .step:last-child{padding-right:0;padding-bottom:0;border-left-color:transparent;}
  .step + .step{border-left:1px solid var(--line);}
  .step__num{position:absolute;left:-23px;top:0;margin-bottom:0;}
  .step p{min-height:0;margin-bottom:0;}
  .case{grid-template-columns:1fr;gap:28px;}
  .news-card--lead .news-card__link{grid-template-columns:1fr;}
  .news-card--lead .news-card__thumb{aspect-ratio:16/9;height:auto;min-height:0;}
  .news-card--lead .news-card__body{padding:24px;}
  .news-card--lead .news-card__title{font-size:21px;-webkit-line-clamp:2;}
  .footer__grid{grid-template-columns:repeat(2,1fr);gap:28px;}
  .cta{padding:32px;}
}
@media (max-width:639px){
  body{font-size:16px;}
  .container{padding:0 20px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  .section{padding:48px 0;}
  .section__head{margin-bottom:26px;}
  .hero__actions{flex-direction:column;align-items:stretch;}
  .hero__actions .btn{width:100%;}
  .trustbar{flex-direction:column;gap:8px;margin-top:24px;}
  .trustbar li{padding:0;border-left:0;}
  .news-grid{grid-template-columns:1fr;}
  .case-stats{flex-direction:column;gap:18px;margin-top:26px;}
  .cta{padding:26px 22px;flex-direction:column;align-items:flex-start;}
  .cta__actions{width:100%;flex-direction:column;}
  .cta__actions .btn{width:100%;}
  .footer__grid{grid-template-columns:1fr;}
  .footer{padding-top:48px;}
  .faq__q{font-size:15px;}
}

/* roulang page: article */
:root{
  --brand:#1C6E8C;
  --brand-deep:#14566F;
  --brand-soft:#E7F1F5;
  --accent:#3E8E6E;
  --accent-soft:#E8F3EE;
  --spark:#C8894A;
  --ink:#1F2D35;
  --ink-2:#5A6B75;
  --ink-3:#8A9AA3;
  --bg:#F6F8F9;
  --card:#FFFFFF;
  --line:#E2E8EC;
  --ok:#2E8B57;
  --warn:#C8894A;
  --err:#C0483E;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,42,58,.05);
  --sh-2:0 10px 28px rgba(16,42,58,.09);
  --sidebar-w:248px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-soft);color:var(--brand-deep)}

/* ---------- 布局容器 ---------- */
.container{max-width:1180px;margin:0 auto;padding:0 40px}
.page{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.page__main{flex:1 1 auto}
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section--soft{background:var(--brand-soft)}
.section--line{border-top:1px solid var(--line)}

/* ---------- 品牌标 ---------- */
.brand{display:flex;align-items:center;gap:10px}
.brand__mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,var(--brand),var(--accent));
  color:#fff;font-weight:700;font-size:17px;letter-spacing:0;
}
.brand__name{font-size:17px;font-weight:700;color:var(--ink);line-height:1.3}
.brand--light .brand__name{color:#fff}

/* ---------- 顶部移动导航 ---------- */
.topbar{
  display:none;
  position:sticky;top:0;z-index:70;
  height:56px;align-items:center;justify-content:space-between;
  padding:0 16px;background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.topbar.is-scrolled{box-shadow:0 2px 12px rgba(16,42,58,.06)}
.topbar__brand{display:flex;align-items:center;gap:10px;min-width:0}
.topbar__mark{
  width:30px;height:30px;flex:0 0 30px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,var(--brand),var(--accent));
  color:#fff;font-weight:700;font-size:15px;
}
.topbar__name{font-size:16px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.burger{
  width:44px;height:44px;flex:0 0 44px;border:0;background:transparent;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  cursor:pointer;border-radius:var(--r-md);
}
.burger span{display:block;width:20px;height:2px;border-radius:2px;background:var(--ink);transition:transform .2s ease,opacity .2s ease}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(4px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){transform:translateY(-4px) rotate(-45deg)}

/* ---------- 左侧竖向导航 ---------- */
.sidebar{
  position:fixed;left:0;top:0;width:var(--sidebar-w);height:100vh;z-index:80;
  background:var(--card);border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:22px 18px 18px;
}
.sidebar::before{
  content:"";position:absolute;left:0;top:26px;width:3px;height:118px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--brand),rgba(28,110,140,0));
}
.sidebar__head{padding:2px 6px 20px}
.sidenav{display:flex;flex-direction:column;gap:4px}
.sidenav__item{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;border-radius:var(--r-md);
  font-size:15px;color:var(--ink-2);
  transition:background .16s ease,color .16s ease;
}
.sidenav__item i{width:18px;font-size:15px;text-align:center;color:var(--ink-3);transition:color .16s ease}
.sidenav__item:hover{background:var(--brand-soft);color:var(--brand)}
.sidenav__item:hover i{color:var(--brand)}
.sidenav__item.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.sidenav__item.is-active i{color:var(--brand)}
.sidenav__item.is-active::before{
  content:"";position:absolute;left:0;top:9px;width:3px;height:26px;border-radius:0 3px 3px 0;background:var(--brand);
}
.sidebar__cta{margin-top:22px}
.sidebar__rule{height:1px;background:var(--line);margin:22px 0 16px}
.sidebar__foot{margin-top:auto;font-size:13px;line-height:1.9;color:var(--ink-3)}
.sidebar__foot strong{display:block;color:var(--ink-2);font-weight:600;font-size:13px;margin-bottom:4px}
.sidebar__foot a{color:var(--ink-3)}
.sidebar__foot a:hover{color:var(--brand)}
.scrim{
  position:fixed;inset:0;background:rgba(10,25,35,.45);opacity:0;visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease;z-index:75;
}
.scrim.is-open{opacity:1;visibility:visible}
body.is-locked{overflow:hidden}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;line-height:1;letter-spacing:0;
  border:1.5px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .16s ease,color .16s ease,border-color .16s ease,transform .16s ease,box-shadow .16s ease;
}
.btn--primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn--primary:hover{background:var(--brand-deep);border-color:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn--ghost{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn--ghost:hover{background:var(--brand-soft)}
.btn--ghost:active{background:#dbe9ef}
.btn--block{width:100%}
.btn--sm{height:40px;padding:0 18px;font-size:14px}
.btn.is-disabled{opacity:.5;cursor:not-allowed;pointer-events:none}
.link{
  color:var(--brand);font-size:15px;font-weight:500;
  border-bottom:2px solid transparent;padding-bottom:2px;
  transition:color .16s ease,border-color .16s ease;
}
.link:hover{color:var(--brand-deep);border-bottom-color:var(--brand-deep)}
.link i{font-size:12px;margin-left:4px}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);
  font-size:12px;font-weight:600;line-height:1.6;
}
.badge--accent{background:var(--accent-soft);color:var(--accent)}
.tagrow{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:#fff;color:var(--ink-2);font-size:13px;
  transition:border-color .16s ease,color .16s ease,background .16s ease;
}
.tag:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-3);padding:26px 0 0;
}
.crumbs a{color:var(--ink-3);transition:color .16s ease}
.crumbs a:hover{color:var(--brand)}
.crumbs__sep{color:#C3CFD6}
.crumbs__cur{color:var(--ink-2);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头部 ---------- */
.article-head{padding:26px 0 30px;border-bottom:1px solid var(--line)}
.article-head h1{
  font-size:44px;line-height:1.25;font-weight:700;letter-spacing:-.5px;
  margin:16px 0 18px;max-width:900px;
}
.meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--ink-3)}
.meta .sep{width:1px;height:12px;background:var(--line)}
.meta i{font-size:12px;color:var(--ink-3)}

/* ---------- 正文阅读区 ---------- */
.article-layout{padding:44px 0 72px}
.article-wrap{max-width:780px}
.article-body{font-size:17px;line-height:1.9;color:var(--ink)}
.article-body p{margin:0 0 20px}
.article-body h2{
  position:relative;margin:40px 0 16px;padding-left:16px;
  font-size:26px;line-height:1.4;font-weight:700;letter-spacing:-.2px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:8px;width:4px;height:18px;border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:20px;line-height:1.5;font-weight:700;margin:28px 0 12px}
.article-body h4{font-size:17px;font-weight:700;margin:22px 0 10px}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 20px}
.article-body li{margin:8px 0}
.article-body ul li{list-style:disc}
.article-body ol li{list-style:decimal}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--brand-soft);
  border-left:3px solid var(--brand);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--ink);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-md);margin:24px auto;height:auto}
.article-body figure img{margin-bottom:8px}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center}
.article-body a{color:var(--brand);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-deep)}
.article-body table{
  width:100%;display:block;overflow-x:auto;border-collapse:collapse;
  margin:22px 0;font-size:15px;background:var(--bg);
}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;vertical-align:top}
.article-body th{background:#fff;font-weight:600}
.article-body code{
  background:var(--bg);border:1px solid var(--line);border-radius:6px;
  padding:2px 6px;font-size:14px;
}
.article-body pre{
  background:var(--bg);border:1px solid var(--line);border-radius:var(--r-md);
  padding:16px 18px;overflow-x:auto;margin:0 0 20px;
}
.article-body pre code{background:none;border:0;padding:0}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* ---------- 空态 ---------- */
.empty{
  min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:40px 24px;text-align:center;
}
.empty i{font-size:24px;color:var(--brand)}
.empty p{color:var(--ink-2);font-size:16px;margin:0}

/* ---------- 文末标签 ---------- */
.article-foot{border-top:1px solid var(--line);margin-top:44px;padding-top:24px}
.article-foot__label{font-size:13px;color:var(--ink-3);margin-bottom:12px}

/* ---------- 板块标题 ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.sec-head h2{font-size:30px;line-height:1.35;font-weight:700;letter-spacing:-.3px}
.sec-head p{font-size:15px;color:var(--ink-2);margin-top:8px;max-width:640px}
.sec-head__side{flex:0 0 auto}

/* ---------- 卡片列表 ---------- */
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  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(28,110,140,.2)}
.card__thumb{position:relative;aspect-ratio:16/9;background:var(--brand-soft);overflow:hidden}
.card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.card:hover .card__thumb img{transform:scale(1.03)}
.card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto}
.card__title{
  font-size:19px;line-height:1.5;font-weight:700;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card__desc{
  font-size:15px;line-height:1.75;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card__meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--ink-3);
}
.card__more{color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.card:hover .card__more{color:var(--brand-deep)}

/* ---------- FAQ ---------- */
.faq{max-width:860px}
.faq__item{border-bottom:1px solid var(--line)}
.faq__item:first-child{border-top:1px solid var(--line)}
.faq__q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:none;border:0;padding:16px 4px;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .18s ease;
}
.faq__q:hover{color:var(--brand)}
.faq__icon{
  position:relative;flex:0 0 18px;width:18px;height:18px;
  transition:transform .2s ease;
}
.faq__icon::before,.faq__icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.faq__icon::before{left:0;top:8px;width:18px;height:2px}
.faq__icon::after{left:8px;top:0;width:2px;height:18px;transition:opacity .2s ease}
.faq__item.is-open .faq__icon{transform:rotate(90deg)}
.faq__item.is-open .faq__icon::after{opacity:0}
.faq__item.is-open .faq__q{color:var(--brand)}
.faq__a{max-height:0;overflow:hidden;transition:max-height .25s ease}
.faq__a-inner{padding:0 4px 20px;font-size:15px;line-height:1.8;color:var(--ink-2);max-width:760px}
.faq__a-inner p{margin:0}

/* ---------- CTA 条 ---------- */
.cta{
  background:var(--brand-soft);border:1px solid #D3E5EC;border-radius:var(--r-lg);
  padding:40px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta__text h2{font-size:26px;line-height:1.4;font-weight:700;letter-spacing:-.2px}
.cta__text p{font-size:15px;color:var(--ink-2);margin-top:10px;max-width:560px}
.cta__act{display:flex;gap:12px;flex:0 0 auto;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.sitefoot{background:#16262E;color:#C7D2D8;margin-top:0}
.sitefoot__grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
  padding:64px 0 44px;
}
.sitefoot__brand .brand{margin-bottom:16px}
.sitefoot__brand p{font-size:14px;line-height:1.85;color:#95A5AE;max-width:320px}
.sitefoot__col h4{font-size:15px;font-weight:700;color:#fff;margin:0 0 16px}
.sitefoot__col a,.sitefoot__col p{display:block;font-size:14px;line-height:1.9;color:#95A5AE;margin:0 0 8px}
.sitefoot__col a{transition:color .16s ease}
.sitefoot__col a:hover{color:#fff}
.sitefoot__bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:14px;color:#8496A0;
}
.sitefoot__bottom a{color:#8496A0}
.sitefoot__bottom a:hover{color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .topbar{display:flex}
  .page{margin-left:0;padding-top:0}
  .sidebar{
    transform:translateX(-100%);
    transition:transform .22s ease-out;
    width:280px;
  }
  .sidebar.is-open{transform:translateX(0);box-shadow:var(--sh-2)}
  .container{padding:0 24px}
  .section{padding:64px 0}
  .section--tight{padding:52px 0}
  .article-head h1{font-size:32px}
  .article-body h2{font-size:23px}
  .cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta{flex-direction:column;align-items:flex-start;padding:32px}
  .sitefoot__grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 36px}
}
@media (max-width:639px){
  .container{padding:0 18px}
  .section{padding:48px 0}
  .section--tight{padding:40px 0}
  .article-head{padding:20px 0 24px}
  .article-head h1{font-size:28px;letter-spacing:-.2px}
  .article-layout{padding:32px 0 56px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:22px;margin:32px 0 14px}
  .article-body h3{font-size:18px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:24px}
  .sec-head h2{font-size:22px}
  .cards{grid-template-columns:minmax(0,1fr);gap:16px}
  .cta{padding:26px 20px}
  .cta__act{width:100%}
  .cta__act .btn{width:100%}
  .faq__q{font-size:15px}
  .sitefoot__grid{grid-template-columns:1fr;gap:28px}
  .crumbs{padding-top:18px}
  .crumbs__cur{max-width:220px}
}

/* roulang page: category1 */
:root{
  --brand:#1C6E8C;
  --brand-deep:#14566F;
  --brand-soft:#E7F1F5;
  --accent:#3E8E6E;
  --accent-soft:#E8F3EE;
  --spark:#C8894A;
  --ink:#1F2D35;
  --ink-2:#5A6B75;
  --ink-3:#8A9AA3;
  --bg:#F6F8F9;
  --card:#FFFFFF;
  --line:#E2E8EC;
  --ok:#2E8B57;
  --warn:#C8894A;
  --err:#C0483E;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,42,58,.05);
  --sh-2:0 10px 28px rgba(16,42,58,.09);
  --side:248px;
  --block-y:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:17px;
  line-height:1.85;
}
body.nav-open{overflow:hidden}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .16s ease}
a:hover{color:var(--brand-deep)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 16px}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--ink)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}

/* ---------- 布局骨架 ---------- */
.main{margin-left:0;min-height:100vh}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
.section{padding:48px 0}
.section--soft{background:var(--brand-soft)}
.section--white{background:var(--card)}
.section__head{max-width:760px;margin-bottom:32px}
.section__eyebrow{
  display:inline-block;font-size:13px;font-weight:500;color:var(--brand);
  background:var(--brand-soft);border-radius:var(--r-pill);padding:4px 12px;margin-bottom:14px;
}
.section__title{font-size:22px;line-height:1.35}
.section__desc{margin-top:12px;color:var(--ink-2);font-size:15px;line-height:1.75}

/* ---------- 顶部导航（移动端） ---------- */
.topbar{
  position:sticky;top:0;z-index:70;
  display:flex;align-items:center;justify-content:space-between;
  height:56px;padding:0 16px;
  background:var(--card);border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.topbar.is-scrolled{box-shadow:0 2px 12px rgba(16,42,58,.06)}
.topbar__brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.topbar__mark{
  width:32px;height:32px;flex:none;border-radius:10px;
  background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:16px;letter-spacing:.5px;
}
.topbar__name{font-size:16px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.burger{
  width:44px;height:44px;flex:none;border-radius:var(--r-md);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
}
.burger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.burger[aria-expanded="true"] span:first-child{transform:translateY(4px) rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{transform:translateY(-4px) rotate(-45deg)}

/* ---------- 左侧竖向导航 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:280px;max-width:84vw;
  background:var(--card);border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:20px 16px 18px;z-index:80;
  transform:translateX(-100%);
  transition:transform .22s ease-out;
}
.sidebar::before{
  content:"";position:absolute;left:0;top:20px;width:3px;height:112px;
  border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--brand),var(--brand-soft));
}
body.nav-open .sidebar{transform:none}
.sidebar__brand{display:flex;align-items:center;gap:10px;padding:2px 8px 0;margin-bottom:26px}
.sidebar__mark{
  width:36px;height:36px;flex:none;border-radius:11px;
  background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:17px;
}
.sidebar__name{font-size:17px;font-weight:700;line-height:1.3}
.sidebar__label{font-size:12px;color:var(--ink-3);padding:0 8px;margin-bottom:8px;letter-spacing:.4px}
.nav{display:flex;flex-direction:column;gap:4px}
.nav__item{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;border-radius:var(--r-md);
  color:var(--ink-2);font-size:15px;
  transition:background .16s ease,color .16s ease;
}
.nav__item svg{width:18px;height:18px;flex:none}
.nav__item:hover{background:var(--brand-soft);color:var(--brand)}
.nav__item.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.nav__item.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:3px;background:var(--brand);
}
.sidebar__cta{margin-top:18px}
.sidebar__foot{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-3);line-height:1.9;
}
.sidebar__foot strong{display:block;color:var(--ink-2);font-weight:500;margin-bottom:4px}
.drawer__close{
  position:absolute;top:14px;right:12px;width:36px;height:36px;border-radius:var(--r-sm);
  color:var(--ink-2);font-size:20px;line-height:1;
}
.drawer__close:hover{background:var(--bg)}
.scrim{
  position:fixed;inset:0;background:rgba(10,25,35,.45);
  opacity:0;visibility:hidden;transition:opacity .2s ease;z-index:75;
}
body.nav-open .scrim{opacity:1;visibility:visible}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 24px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;line-height:1;
  transition:background .16s ease,color .16s ease,transform .16s ease,box-shadow .16s ease,border-color .16s ease;
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn--primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn--ghost{background:var(--card);color:var(--brand);border:1.5px solid var(--brand)}
.btn--ghost:hover{background:var(--brand-soft);color:var(--brand-deep)}
.btn--block{width:100%}
.btn--sm{height:40px;padding:0 18px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px}
.link-arrow:hover{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}

/* ---------- 面包屑 ---------- */
.crumb{font-size:13px;color:var(--ink-3);display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.crumb a{color:var(--ink-3)}
.crumb a:hover{color:var(--brand)}
.crumb span[aria-current]{color:var(--ink-2)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(100deg,var(--bg) 0%,var(--brand-soft) 100%);
  padding:36px 0 56px;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.04;
  background-image:radial-gradient(var(--brand) 1px,transparent 1px);
  background-size:18px 18px;
}
.hero__inner{position:relative;z-index:1}
.hero__grid{display:grid;grid-template-columns:1fr;gap:32px;margin-top:24px;align-items:center}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:500;color:var(--brand);
  background:var(--brand-soft);border:1px solid rgba(28,110,140,.16);
  border-radius:var(--r-pill);padding:5px 12px;
}
.badge--accent{background:var(--accent-soft);color:var(--accent);border-color:rgba(62,142,110,.18)}
.hero h1{font-size:28px;line-height:1.25;letter-spacing:-.5px;margin:16px 0 14px}
.hero__sub{font-size:16px;color:var(--ink-2);line-height:1.75;max-width:560px}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.hero__media{
  border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh-2);background:var(--card);
}
.hero__media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.trust{
  display:flex;flex-wrap:wrap;gap:0;margin-top:28px;
  border-top:1px solid var(--line);padding-top:16px;
}
.trust__item{
  font-size:14px;color:var(--ink-2);padding:0 18px 0 0;margin-right:18px;
  border-right:1px solid var(--line);
}
.trust__item:last-child{border-right:0;margin-right:0;padding-right:0}

/* ---------- 图文交替 ---------- */
.duo{display:grid;grid-template-columns:1fr;gap:28px;align-items:center;padding:28px 0}
.duo + .duo{border-top:1px solid var(--line)}
.duo__media{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);background:var(--card)}
.duo__media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.duo h3{font-size:20px;margin-bottom:12px}
.duo p{color:var(--ink-2);font-size:16px;line-height:1.8}
.duo__list{margin-top:8px;display:grid;gap:8px}
.duo__list li{position:relative;padding-left:20px;color:var(--ink-2);font-size:15px}
.duo__list li::before{
  content:"";position:absolute;left:2px;top:11px;width:7px;height:7px;border-radius:50%;
  background:var(--accent);
}

/* ---------- 要点清单 ---------- */
.points{display:grid;gap:18px}
.point{
  position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px 24px 22px 28px;box-shadow:var(--sh-1);
  transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.point::before{
  content:"";position:absolute;left:0;top:20px;bottom:20px;width:3px;border-radius:3px;background:var(--accent);
}
.point:hover{border-color:rgba(28,110,140,.2);box-shadow:var(--sh-2);transform:translateY(-2px)}
.point h3{font-size:17px;margin-bottom:8px}
.point p{color:var(--ink-2);font-size:15px;line-height:1.8;margin:0}
.point__tag{
  display:inline-block;margin-top:12px;font-size:12px;font-weight:500;
  color:var(--brand);background:var(--brand-soft);border-radius:var(--r-pill);padding:3px 10px;
}

/* ---------- 三步流程 ---------- */
.steps{display:grid;grid-template-columns:1fr;gap:0;margin-top:8px}
.step{position:relative;padding:24px 0 24px 56px;border-top:1px solid var(--line)}
.step:first-child{border-top:0}
.step__num{
  position:absolute;left:0;top:24px;
  width:38px;height:38px;border-radius:var(--r-pill);
  display:flex;align-items:center;justify-content:center;
  background:var(--card);color:var(--spark);font-weight:700;font-size:14px;
  border:1px solid var(--line);font-variant-numeric:tabular-nums;
}
.step h3{font-size:18px;margin-bottom:8px}
.step p{color:var(--ink-2);font-size:15px;line-height:1.8;margin:0}
.step__hint{
  display:inline-block;margin-top:10px;font-size:13px;color:var(--accent);
  background:var(--accent-soft);border-radius:var(--r-pill);padding:3px 10px;
}

/* ---------- 数据指标 ---------- */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}
.stat__num{font-size:30px;font-weight:700;color:var(--spark);font-variant-numeric:tabular-nums;line-height:1.2}
.stat__label{font-size:13px;color:var(--ink-2);margin-top:4px}

/* ---------- FAQ ---------- */
.faq{max-width:860px}
.faq__item{border-bottom:1px solid var(--line)}
.faq__item:first-child{border-top:1px solid var(--line)}
.faq__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 0;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);transition:color .16s ease;
}
.faq__q:hover{color:var(--brand)}
.faq__item.is-open .faq__q{color:var(--brand)}
.faq__icon{position:relative;width:18px;height:18px;flex:none}
.faq__icon::before,.faq__icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .2s ease,opacity .2s ease;
}
.faq__icon::before{width:14px;height:2px}
.faq__icon::after{width:2px;height:14px}
.faq__item.is-open .faq__icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq__a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq__item.is-open .faq__a{max-height:420px}
.faq__a p{color:var(--ink-2);font-size:15px;line-height:1.8;padding:0 40px 20px 0;margin:0}

/* ---------- CTA 与表单 ---------- */
.cta{
  background:linear-gradient(120deg,var(--brand-soft) 0%,var(--accent-soft) 100%);
  border-radius:var(--r-lg);border:1px solid var(--line);
  padding:32px 24px;
}
.cta__grid{display:grid;grid-template-columns:1fr;gap:28px;align-items:start}
.cta h2{font-size:22px;line-height:1.35;margin-bottom:12px}
.cta__text{color:var(--ink-2);font-size:15px;line-height:1.8;margin-bottom:18px}
.form{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;box-shadow:var(--sh-1)}
.form__row{display:grid;grid-template-columns:1fr;gap:16px}
.form__field{display:flex;flex-direction:column;gap:6px}
.form__field label{font-size:14px;color:var(--ink-2)}
.form__field input,.form__field textarea{
  width:100%;font:inherit;font-size:15px;color:var(--ink);
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:12px 14px;transition:border-color .16s ease,box-shadow .16s ease;
}
.form__field input{height:48px;padding:0 14px}
.form__field textarea{min-height:104px;resize:vertical;line-height:1.7}
.form__field input:focus,.form__field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(28,110,140,.12);
}
.form__field.has-error input,.form__field.has-error textarea{border-color:var(--err)}
.form__error{font-size:13px;color:var(--err);display:none}
.form__field.has-error .form__error{display:block}
.form__foot{margin-top:18px;display:flex;flex-direction:column;gap:12px}
.form__note{font-size:13px;color:var(--ink-3)}
.form__success{
  display:none;margin-top:16px;font-size:14px;color:var(--ok);
  background:var(--accent-soft);border-radius:var(--r-sm);padding:12px 14px;
}
.form__success.is-visible{display:block}

/* ---------- 页脚 ---------- */
.footer{background:#16262E;color:#C7D2D8;margin-top:0;padding:52px 0 0}
.footer a{color:#C7D2D8}
.footer a:hover{color:#fff}
.footer__grid{display:grid;grid-template-columns:1fr;gap:28px;padding-bottom:36px}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer__mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;
}
.footer__name{font-size:16px;font-weight:700;color:#fff}
.footer__desc{font-size:14px;line-height:1.8;color:#9FB0B8;max-width:320px}
.footer h3{font-size:15px;color:#fff;margin-bottom:14px;font-weight:600}
.footer__list{display:grid;gap:10px;font-size:14px}
.footer__bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:18px 0 26px;font-size:14px;color:#8FA0A8;
  display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;justify-content:space-between;
}

/* ---------- 响应式 ---------- */
@media (min-width:640px){
  .section{padding:64px 0}
  .container{padding:0 28px}
  .hero h1{font-size:34px}
  .section__title{font-size:26px}
  .duo{grid-template-columns:1fr 1fr;gap:36px;padding:36px 0}
  .duo--reverse .duo__media{order:2}
  .points{grid-template-columns:1fr 1fr}
  .form__row{grid-template-columns:1fr 1fr}
  .form__row--full{grid-template-columns:1fr}
  .cta{padding:40px 32px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (min-width:1024px){
  .topbar{display:none}
  .main{margin-left:var(--side)}
  .container{padding:0 32px}
  .sidebar{
    width:var(--side);max-width:none;transform:none;transition:none;
    padding:22px 18px 20px;
  }
  .drawer__close{display:none}
  .scrim{display:none!important}
  .section{padding:var(--block-y) 0}
  .hero{padding:64px 0 84px}
  .hero__grid{grid-template-columns:1.05fr .95fr;gap:48px}
  .hero h1{font-size:44px}
  .hero__sub{font-size:18px}
  .section__title{font-size:30px}
  .steps{grid-template-columns:repeat(3,1fr);gap:0}
  .step{border-top:0;border-left:1px solid var(--line);padding:34px 24px 0 24px}
  .step:first-child{border-left:0;padding-left:0}
  .step__num{position:static;margin-bottom:16px}
  .cta__grid{grid-template-columns:1fr 1fr;gap:40px}
  .stats{gap:24px}
  .footer{padding-top:64px}
  .footer__grid{grid-template-columns:1.4fr 1fr 1fr 1fr}
}
@media (max-width:519px){
  .hero h1{font-size:26px}
  .stats{grid-template-columns:1fr;gap:12px}
  .trust__item{border-right:0;padding-right:0;margin-right:0}
  .trust{flex-direction:column;gap:8px}
}

/* roulang page: category2 */
:root{
  --brand:#1C6E8C;
  --brand-deep:#14566F;
  --brand-soft:#E7F1F5;
  --accent:#3E8E6E;
  --accent-soft:#E8F3EE;
  --spark:#C8894A;
  --ink:#1F2D35;
  --ink-2:#5A6B75;
  --ink-3:#8A9AA3;
  --bg:#F6F8F9;
  --card:#FFFFFF;
  --line:#E2E8EC;
  --ok:#2E8B57;
  --warn:#C8894A;
  --err:#C0483E;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,42,58,.05);
  --sh-2:0 10px 28px rgba(16,42,58,.09);
  --sidebar-w:248px;
  --ff:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html,body{max-width:100%;overflow-x:hidden}
body{
  margin:0;
  font-family:var(--ff);
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,textarea{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:var(--brand-soft);color:var(--brand-deep)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}

/* ---------- 布局容器 ---------- */
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
.main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section__head{max-width:760px;margin-bottom:40px}
.section__head h2{font-size:30px;line-height:1.35;font-weight:700;color:var(--ink);position:relative;padding-left:18px}
.section__head h2::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;border-radius:2px;background:var(--brand)}
.section__head p{margin-top:14px;font-size:15px;line-height:1.75;color:var(--ink-2)}

/* ---------- 顶部移动导航 ---------- */
.topbar{
  display:none;
  position:sticky;top:0;z-index:60;
  height:56px;align-items:center;justify-content:space-between;
  padding:0 16px;background:var(--card);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.topbar.is-stuck{box-shadow:0 2px 12px rgba(16,42,58,.06)}
.topbar__brand{display:flex;align-items:center;gap:10px;min-width:0}
.topbar__mark{
  width:30px;height:30px;flex:0 0 30px;border-radius:9px;
  background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;letter-spacing:0;
}
.topbar__name{font-size:16px;font-weight:700;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.burger{
  width:44px;height:44px;flex:0 0 44px;border:1px solid var(--line);background:var(--card);
  border-radius:var(--r-md);display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:5px;cursor:pointer;transition:background .2s ease,border-color .2s ease;
}
.burger span{width:20px;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s ease,opacity .22s ease}
.burger:hover{background:var(--brand-soft);border-color:rgba(28,110,140,.3)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(3.5px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){transform:translateY(-3.5px) rotate(-45deg)}

/* ---------- 左侧竖向导航 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);z-index:70;
  background:var(--card);border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:18px 16px 20px;
  overflow-y:auto;
}
.sidebar::before{
  content:"";position:absolute;left:0;top:22px;width:3px;height:112px;
  border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--brand),rgba(28,110,140,0));
}
.sidebar__brand{padding:4px 4px 18px;border-bottom:1px solid var(--line);margin-bottom:14px}
.sidebar__logo{display:flex;align-items:center;gap:10px}
.mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:11px;
  background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;box-shadow:var(--sh-1);
}
.sidebar__name{font-size:17px;font-weight:700;line-height:1.25;color:var(--ink)}
.sidebar__nav{display:flex;flex-direction:column;gap:4px;margin-bottom:18px}
.sidebar__nav a{
  display:flex;align-items:center;gap:10px;
  height:44px;padding:0 10px;border-radius:var(--r-md);
  font-size:15px;font-weight:500;color:var(--ink-2);
  border-left:3px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.sidebar__nav a svg{flex:0 0 18px;color:currentColor;opacity:.85}
.sidebar__nav a:hover{background:var(--brand-soft);color:var(--brand)}
.sidebar__nav a.is-active{background:var(--brand-soft);color:var(--brand);border-left-color:var(--brand);font-weight:600}
.sidebar__foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);font-size:13px;line-height:1.9;color:var(--ink-3)}
.sidebar__foot strong{display:block;color:var(--ink-2);font-weight:600;margin-bottom:4px;font-size:13px}
.scrim{position:fixed;inset:0;background:rgba(10,25,35,.45);opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s ease;z-index:65}
.scrim.is-open{opacity:1;visibility:visible}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1.5px solid transparent;background:transparent;
  transition:background .16s ease,color .16s ease,border-color .16s ease,transform .16s ease,box-shadow .16s ease;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn--primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0)}
.btn--ghost{background:var(--card);border-color:var(--brand);color:var(--brand)}
.btn--ghost:hover{background:var(--brand-soft)}
.btn--ghost:active{transform:translateY(1px)}
.btn--small{height:40px;padding:0 18px;font-size:14px}
.btn--block{width:100%}
.btn.is-disabled,.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.link-more{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand);
  font-size:15px;font-weight:600;transition:color .16s ease;
}
.link-more:hover{color:var(--brand-deep);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:500;line-height:1.5;
  background:var(--brand-soft);color:var(--brand-deep);
}
.badge--accent{background:var(--accent-soft);color:#2C6C53}
.tag{display:inline-flex;align-items:center;padding:4px 10px;border-radius:var(--r-pill);font-size:12px;background:var(--accent-soft);color:#2C6C53;font-weight:500}

/* ---------- 顶部宽幅视觉 ---------- */
.pagebanner{position:relative;background:var(--brand-soft)}
.pagebanner img{width:100%;height:280px;object-fit:cover}
.pagebanner__cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:16px 20px;display:flex;align-items:center;gap:12px;
  background:linear-gradient(180deg,rgba(16,42,58,0),rgba(16,42,58,.72));
  color:#fff;font-size:13px;
}
.pagebanner__cap .badge{background:rgba(255,255,255,.92);color:var(--brand-deep)}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(90deg,rgba(246,248,249,.92),rgba(231,241,245,.75));
  padding:64px 0 72px;border-bottom:1px solid var(--line);
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:22px}
.crumbs a{color:var(--ink-3);transition:color .16s ease}
.crumbs a:hover{color:var(--brand)}
.crumbs span{color:var(--ink-3)}
.hero__grid{display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center}
.hero h1{
  font-size:44px;line-height:1.25;letter-spacing:-.5px;font-weight:700;
  margin:16px 0 18px;color:var(--ink);
}
.hero__lead{font-size:17px;line-height:1.8;color:var(--ink-2);max-width:620px}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.trustbar{
  display:flex;flex-wrap:wrap;align-items:center;gap:0 22px;
  margin-top:30px;padding-top:22px;border-top:1px solid var(--line);
}
.trustbar li{font-size:14px;color:var(--ink-2);position:relative;padding-right:22px}
.trustbar li+li::before{content:"";position:absolute;left:-11px;top:50%;transform:translateY(-50%);width:1px;height:14px;background:var(--line)}
.trustbar li:last-child{padding-right:0}
.trustbar li+.trustbar li::before{left:-11px}
.hero__media{
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-2);background:var(--card);
}
.hero__media img{width:100%;aspect-ratio:4/3;object-fit:cover}

/* ---------- 数据指标条 ---------- */
.metrics{background:var(--card);border-bottom:1px solid var(--line);padding:56px 0}
.metrics__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.metric{padding:24px 20px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--card);transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease}
.metric:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:rgba(28,110,140,.2)}
.metric__num{font-size:30px;font-weight:700;color:var(--spark);line-height:1.2;font-variant-numeric:tabular-nums}
.metric__num small{font-size:15px;font-weight:600;margin-left:4px;color:var(--spark)}
.metric__label{margin-top:8px;font-size:13px;color:var(--ink-2);line-height:1.7}

/* ---------- 左右分栏 ---------- */
.split{display:grid;grid-template-columns:222px 1fr;gap:48px;align-items:start}
.toc{position:sticky;top:32px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;box-shadow:var(--sh-1)}
.toc h3{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:12px}
.toc ol{display:flex;flex-direction:column;gap:2px;counter-reset:toc}
.toc li{counter-increment:toc}
.toc a{
  display:flex;align-items:flex-start;gap:10px;
  padding:9px 10px;border-radius:var(--r-sm);
  font-size:14px;line-height:1.6;color:var(--ink-2);
  transition:background .16s ease,color .16s ease;
}
.toc a::before{content:counter(toc,decimal-leading-zero);font-size:12px;font-weight:600;color:var(--spark);font-variant-numeric:tabular-nums;line-height:1.9}
.toc a:hover{background:var(--brand-soft);color:var(--brand)}
.toc a.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.toc__note{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);font-size:12px;line-height:1.75;color:var(--ink-3)}

.block{padding-bottom:40px;margin-bottom:40px;border-bottom:1px solid var(--line);scroll-margin-top:32px}
.block:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.block h2{font-size:26px;line-height:1.35;font-weight:700;color:var(--ink);margin-bottom:8px}
.block h3{font-size:20px;line-height:1.5;font-weight:600;color:var(--ink);margin:26px 0 10px}
.block p{color:var(--ink-2);font-size:16px;line-height:1.85;margin-bottom:16px}
.block p strong{color:var(--ink);font-weight:600}
.block figure{margin:22px 0}
.block figure img{width:100%;border-radius:var(--r-md);border:1px solid var(--line);object-fit:cover;aspect-ratio:16/9}
.block figcaption{margin-top:10px;font-size:13px;color:var(--ink-3);text-align:center}
.checks{display:flex;flex-direction:column;gap:16px;margin:18px 0 6px}
.checks li{padding-left:16px;border-left:3px solid var(--accent)}
.checks li h4{font-size:17px;line-height:1.55;font-weight:600;color:var(--ink);margin-bottom:6px}
.checks li p{margin:0;font-size:15px;line-height:1.75;color:var(--ink-2)}
.steps{display:flex;flex-direction:column;gap:0;margin:20px 0 6px;border-left:1px solid var(--line);padding-left:0}
.steps li{position:relative;padding:0 0 22px 34px}
.steps li:last-child{padding-bottom:0}
.steps li::before{
  content:attr(data-num);position:absolute;left:-15px;top:2px;
  width:30px;height:30px;border-radius:var(--r-pill);
  background:var(--spark);color:#fff;font-size:12px;font-weight:600;
  display:flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums;
}
.steps li h4{font-size:17px;font-weight:600;color:var(--ink);line-height:1.6}
.steps li p{margin:4px 0 0;font-size:15px;color:var(--ink-2);line-height:1.75}
.callout{
  background:var(--brand-soft);border-left:3px solid var(--brand);
  border-radius:0 var(--r-md) var(--r-md) 0;
  padding:18px 20px;font-size:15px;line-height:1.8;color:var(--brand-deep);
}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;margin-top:8px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 0;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);transition:color .18s ease;
}
.faq-q:hover{color:var(--brand)}
.faq-item.is-open .faq-q{color:var(--brand)}
.faq-ico{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.faq-ico::before{left:0;top:7px;width:16px;height:2px}
.faq-ico::after{left:7px;top:0;width:2px;height:16px}
.faq-item.is-open .faq-ico::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{padding:0 0 20px;font-size:15px;line-height:1.8;color:var(--ink-2);max-width:760px}

/* ---------- CTA / 表单 ---------- */
.cta{background:var(--brand-soft);border-top:1px solid var(--line);padding:72px 0}
.cta__grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:48px;align-items:start}
.cta h2{font-size:30px;line-height:1.35;font-weight:700;color:var(--ink)}
.cta__text{font-size:16px;line-height:1.8;color:var(--ink-2);margin-top:14px}
.cta__list{margin-top:22px;display:flex;flex-direction:column;gap:10px}
.cta__list li{font-size:15px;color:var(--ink-2);padding-left:22px;position:relative;line-height:1.7}
.cta__list li::before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:2px;background:var(--accent)}
.form{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;box-shadow:var(--sh-1)}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.field label{font-size:14px;color:var(--ink-2);font-weight:500}
.field input,.field textarea{
  width:100%;height:48px;padding:0 14px;border:1px solid var(--line);
  border-radius:var(--r-sm);background:var(--card);color:var(--ink);
  transition:border-color .16s ease,box-shadow .16s ease;line-height:1.6;
}
.field textarea{height:118px;padding:12px 14px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(28,110,140,.12);
}
.field.has-error input,.field.has-error textarea{border-color:var(--err)}
.field .err-msg{display:none;font-size:13px;color:var(--err)}
.field.has-error .err-msg{display:block}
.form__tip{font-size:13px;color:var(--ink-3);margin-top:12px;line-height:1.7}
.form__ok{
  display:none;margin-bottom:18px;padding:12px 16px;border-radius:var(--r-sm);
  background:var(--accent-soft);color:#22664A;font-size:14px;line-height:1.7;
}
.form__ok.is-show{display:block}

/* ---------- 页脚 ---------- */
.site-foot{background:#16262E;color:#C7D2D8;padding:64px 0 0;font-size:14px}
.site-foot .container{display:block}
.foot__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.foot__brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot__mark{width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700}
.foot__name{font-size:17px;font-weight:700;color:#fff}
.site-foot p{line-height:1.85;color:#A9B8BF;font-size:14px}
.site-foot h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px}
.site-foot ul{display:flex;flex-direction:column;gap:10px}
.site-foot ul a{color:#A9B8BF;transition:color .16s ease}
.site-foot ul a:hover{color:#fff}
.foot__contact li{color:#A9B8BF;line-height:1.8}
.foot__bottom{
  border-top:1px solid rgba(255,255,255,.14);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:10px 24px;
  align-items:center;justify-content:space-between;
  font-size:14px;color:#8FA0A8;
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hero h1{font-size:38px}
  .split{grid-template-columns:200px 1fr;gap:32px}
}
@media (max-width:1023px){
  .sidebar{
    transform:translateX(-100%);
    transition:transform .22s ease-out;
    box-shadow:var(--sh-2);
    width:280px;
  }
  .sidebar.is-open{transform:translateX(0)}
  .topbar{display:flex}
  .main{margin-left:0}
  .section{padding:64px 0}
  .section--tight{padding:48px 0}
  .pagebanner img{height:220px}
  .hero{padding:48px 0 56px}
  .hero__grid{grid-template-columns:1fr;gap:32px}
  .hero h1{font-size:32px}
  .metrics{padding:44px 0}
  .metrics__grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .split{grid-template-columns:1fr;gap:28px}
  .toc{position:static}
  .cta__grid{grid-template-columns:1fr;gap:32px}
  .cta{padding:56px 0}
  .foot__grid{grid-template-columns:1fr 1fr;gap:32px;padding-bottom:36px}
}
@media (max-width:639px){
  body{font-size:16px}
  .section{padding:48px 0}
  .section__head{margin-bottom:26px}
  .section__head h2{font-size:22px}
  .pagebanner img{height:170px}
  .hero{padding:36px 0 44px}
  .hero h1{font-size:28px;margin:14px 0 14px}
  .hero__lead{font-size:16px}
  .hero__actions .btn{width:100%}
  .trustbar{gap:8px 16px;flex-direction:column;align-items:flex-start}
  .trustbar li{padding-right:0}
  .trustbar li+li::before{display:none}
  .metrics__grid{grid-template-columns:1fr 1fr}
  .metric{padding:18px 16px}
  .metric__num{font-size:24px}
  .block h2{font-size:21px}
  .block h3{font-size:18px}
  .form{padding:20px}
  .form__row{grid-template-columns:1fr}
  .cta h2{font-size:22px}
  .foot__grid{grid-template-columns:1fr;gap:26px}
  .foot__bottom{flex-direction:column;align-items:flex-start;gap:8px}
}