/* roulang page: index */
:root{
  --primary:#1F5FD0;
  --primary-hover:#17499F;
  --primary-active:#123A80;
  --primary-soft:#EAF1FD;
  --primary-soft-hover:#DCE8FB;
  --secondary:#14B8A6;
  --secondary-soft:#E6F7F5;
  --accent:#FF7A45;
  --accent-soft:#FFF1EB;
  --bg:#FFFFFF;
  --bg-alt:#F6F8FB;
  --dark:#0F1B2D;
  --text:#0F1B2D;
  --text-sub:#4A5568;
  --text-mute:#8A94A6;
  --border:#E4E9F2;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-hero:18px;
  --radius-pill:999px;
  --shadow:0 1px 2px rgba(15,27,45,.04),0 8px 24px rgba(15,27,45,.06);
  --shadow-hover:0 10px 28px rgba(15,27,45,.10);
  --ease:180ms ease-out;
  --gutter:80px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:Inter,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color var(--ease),text-decoration-color var(--ease);}
a:hover{color:var(--primary-hover);text-decoration:underline;text-underline-offset:2px;}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--dark);color:#C7D2E2;font-size:13px;}
.topbar__inner{display:flex;align-items:center;gap:24px;min-height:34px;padding-top:4px;padding-bottom:4px;}
.topbar__brand{color:#fff;font-weight:600;letter-spacing:.2px;}
.topbar__note{color:#93A2B8;}
.topbar__actions{margin-left:auto;display:flex;gap:20px;}
.topbar__actions a{color:#C7D2E2;}
.topbar__actions a:hover{color:#fff;text-decoration:underline;}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--border);transition:box-shadow var(--ease);}
.site-header.is-scrolled{box-shadow:0 4px 16px rgba(15,27,45,.06);}
.header__inner{display:flex;align-items:center;gap:32px;min-height:68px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;}
.brand:hover{text-decoration:none;color:var(--text);}
.brand__mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  background:linear-gradient(135deg,var(--primary),#3E7BE0);
  color:#fff;font-weight:700;font-size:17px;display:flex;align-items:center;justify-content:center;
}
.brand__text{display:flex;flex-direction:column;line-height:1.18;}
.brand__line1{font-size:15px;font-weight:700;letter-spacing:.2px;}
.brand__line2{font-size:12px;font-weight:500;color:var(--text-mute);letter-spacing:2px;}
.nav{display:flex;align-items:center;gap:28px;margin-left:8px;}
.nav__link{
  position:relative;font-size:15px;font-weight:600;color:var(--text-sub);
  padding:22px 0;text-decoration:none;transition:color var(--ease);
}
.nav__link:hover{color:var(--primary);text-decoration:none;}
.nav__link.is-active{color:var(--primary);}
.nav__link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;
  background:var(--primary);border-radius:2px;
}
.header__tools{margin-left:auto;display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;color:var(--text-sub);
  background:#fff;transition:all var(--ease);
}
.icon-btn:hover{color:var(--primary);border-color:var(--primary-soft-hover);background:var(--primary-soft);}
.icon-btn svg{width:18px;height:18px;}
.menu-toggle{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--border);align-items:center;justify-content:center;color:var(--text);}
.menu-toggle svg{width:20px;height:20px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;text-decoration:none;
  border:1px solid transparent;transition:all var(--ease);white-space:nowrap;
}
.btn:hover{text-decoration:none;}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn--primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(31,95,208,.22);}
.btn--primary:hover{background:var(--primary-hover);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(31,95,208,.28);}
.btn--primary:active{background:var(--primary-active);transform:translateY(0);}
.btn--ghost{background:#fff;color:var(--primary);border-color:var(--primary);}
.btn--ghost:hover{background:var(--primary-soft);color:var(--primary-hover);border-color:var(--primary-hover);}
.btn--soft{background:var(--primary-soft);color:var(--primary-active);}
.btn--soft:hover{background:var(--primary-soft-hover);color:var(--primary-active);}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- 标签 ---------- */
.chip{
  display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 14px;
  border-radius:var(--radius-pill);font-size:13px;font-weight:500;
  background:#F1F4F9;color:var(--text-sub);border:1px solid transparent;
  transition:all var(--ease);cursor:pointer;
}
.chip:hover{background:#E7ECF4;color:var(--text);}
.chip.is-active{background:var(--primary);color:#fff;border-color:var(--primary);}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--radius-pill);
  font-size:11px;font-weight:500;background:var(--secondary-soft);color:#0E8A7D;letter-spacing:.2px;
}
.tag--hint{background:var(--accent-soft);color:#D9552A;}
.tag--plain{background:#F1F4F9;color:var(--text-sub);}

/* ---------- Hero ---------- */
.hero{padding:64px 0 var(--gutter);background:linear-gradient(180deg,#F7FAFF 0%,#FFFFFF 100%);}
.hero__grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center;}
.hero__content{grid-column:span 6;}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--primary);
  background:var(--primary-soft);border-radius:var(--radius-pill);padding:6px 14px;margin-bottom:20px;
}
.hero__eyebrow span.dot{width:6px;height:6px;border-radius:50%;background:var(--secondary);}
.hero__title{font-size:40px;line-height:1.25;font-weight:700;letter-spacing:-.2px;}
.hero__title em{font-style:normal;color:var(--primary);}
.hero__sub{margin-top:18px;font-size:17px;line-height:1.8;color:var(--text-sub);max-width:30em;}
.hero__points{margin-top:22px;display:flex;flex-direction:column;gap:10px;}
.hero__points li{display:flex;align-items:center;gap:10px;font-size:15px;color:var(--text-sub);}
.hero__points i{width:16px;height:16px;flex:0 0 16px;border-radius:5px;background:var(--secondary-soft);border:1px solid rgba(20,184,166,.35);display:inline-block;}
.hero__ctas{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px;}
.hero__media{grid-column:span 6;position:relative;}
.hero__media img{width:100%;height:400px;object-fit:cover;border-radius:var(--radius-hero);box-shadow:var(--shadow);}
.hero__badge{
  position:absolute;left:-14px;bottom:26px;background:#fff;border-radius:14px;
  padding:14px 18px;box-shadow:var(--shadow-hover);display:flex;align-items:center;gap:12px;
}
.hero__badge b{font-size:22px;font-weight:700;color:var(--primary);line-height:1;}
.hero__badge span{font-size:12px;color:var(--text-mute);display:block;margin-top:4px;}
.hero__stats{
  margin-top:40px;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding-top:28px;border-top:1px solid var(--border);
}
.hero__stats li strong{display:block;font-size:28px;font-weight:700;color:var(--text);line-height:1.2;}
.hero__stats li span{font-size:13px;color:var(--text-mute);}

/* ---------- 板块 ---------- */
.section{padding:var(--gutter) 0;}
.section--alt{background:var(--bg-alt);}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
.section__head h2{font-size:28px;line-height:1.35;font-weight:700;}
.section__head p{margin-top:10px;font-size:15px;color:var(--text-sub);max-width:44em;}
.link-more{font-size:14px;font-weight:600;white-space:nowrap;display:inline-flex;align-items:center;gap:6px;}
.link-more:hover{text-decoration:none;color:var(--primary-hover);}

/* ---------- 合集目录 ---------- */
.collection-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.collection-card{
  grid-column:span 1;background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:all var(--ease);
}
.collection-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.collection-card--wide{grid-column:span 2;flex-direction:row;align-items:stretch;gap:24px;}
.collection-card__thumb{position:relative;border-radius:var(--radius-img);overflow:hidden;margin-bottom:18px;}
.collection-card__thumb::after{
  content:"";position:absolute;left:16px;top:0;width:44px;height:3px;border-radius:0 0 3px 3px;background:var(--primary);
}
.collection-card__thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.collection-card--wide .collection-card__thumb{flex:0 0 46%;margin-bottom:0;}
.collection-card__body{display:flex;flex-direction:column;flex:1;}
.collection-card h3{font-size:17px;font-weight:600;line-height:1.5;}
.collection-card h3 a{color:var(--text);}
.collection-card h3 a:hover{color:var(--primary);text-decoration:none;}
.collection-card p{margin-top:10px;font-size:14px;color:var(--text-sub);line-height:1.7;}
.collection-card__meta{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-mute);
}
.collection-card__meta .arrow{color:var(--primary);font-weight:600;}

/* ---------- 精选条目 ---------- */
.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.feature-card{
  position:relative;background:#fff;border-radius:var(--radius-card);padding:24px 24px 24px 28px;
  box-shadow:var(--shadow);overflow:hidden;transition:all var(--ease);
}
.feature-card::before{content:"";position:absolute;left:0;top:20px;bottom:20px;width:4px;border-radius:0 4px 4px 0;background:var(--primary);}
.feature-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.feature-card h3{margin-top:14px;font-size:17px;font-weight:600;line-height:1.5;}
.feature-card h3 a{color:var(--text);}
.feature-card h3 a:hover{color:var(--primary);text-decoration:none;}
.feature-card p{margin-top:10px;font-size:14px;color:var(--text-sub);line-height:1.7;}
.feature-card__foot{margin-top:18px;display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-mute);}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:all var(--ease);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.news-card__top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;}
.news-card__time{font-size:13px;color:var(--text-mute);}
.news-card h3{font-size:17px;font-weight:600;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card h3 a{color:var(--text);}
.news-card h3 a:hover{color:var(--primary);text-decoration:none;}
.news-card p{margin-top:12px;font-size:14px;color:var(--text-sub);line-height:1.75;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.news-card__foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;font-size:13px;}
.news-card__foot a{font-weight:600;}
.empty-state{
  grid-column:1 / -1;text-align:center;padding:48px 20px;background:#fff;
  border:1px dashed var(--border);border-radius:var(--radius-card);
}
.empty-state__icon{
  width:64px;height:64px;margin:0 auto 16px;border-radius:50%;
  background:rgba(31,95,208,.08);display:flex;align-items:center;justify-content:center;color:var(--primary);
}
.empty-state__icon svg{width:28px;height:28px;}
.empty-state p{font-size:15px;color:var(--text-sub);margin-bottom:18px;}

/* ---------- 相关推荐 ---------- */
.scroll-row{display:flex;gap:18px;overflow-x:auto;padding:6px 4px 18px;scrollbar-width:thin;}
.scroll-row::-webkit-scrollbar{height:8px;}
.scroll-row::-webkit-scrollbar-thumb{background:#D7DEEA;border-radius:8px;}
.mini-card{
  flex:0 0 262px;background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:18px 20px;box-shadow:var(--shadow);transition:all var(--ease);
}
.mini-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.mini-card h3{font-size:15px;font-weight:600;line-height:1.6;}
.mini-card h3 a{color:var(--text);}
.mini-card h3 a:hover{color:var(--primary);text-decoration:none;}
.mini-card time{display:block;margin-top:12px;font-size:13px;color:var(--text-mute);}

/* ---------- CTA 横幅 ---------- */
.cta-banner{
  background:var(--primary-soft);border-radius:20px;padding:36px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.cta-banner h2{font-size:24px;font-weight:700;line-height:1.4;}
.cta-banner p{margin-top:10px;font-size:15px;color:var(--text-sub);}
.cta-banner__actions{display:flex;gap:14px;flex:0 0 auto;}

/* ---------- FAQ ---------- */
.faq{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow);}
.faq__item + .faq__item{border-top:1px solid var(--border);}
.faq__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 26px;text-align:left;font-size:16px;font-weight:600;color:var(--text);
  transition:background var(--ease);
}
.faq__q:hover{background:#FAFBFD;}
.faq__icon{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;background:var(--primary-soft);
  color:var(--primary);display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:600;transition:transform 200ms ease-out;
}
.faq__item.is-open .faq__icon{transform:rotate(45deg);}
.faq__a{max-height:0;overflow:hidden;transition:max-height 200ms ease-out;}
.faq__a p{padding:0 26px 22px;font-size:15px;line-height:1.8;color:var(--text-sub);}
.faq__item.is-open .faq__a{max-height:400px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#A9B6C8;margin-top:var(--gutter);}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 44px;}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer__brand .brand__mark{background:linear-gradient(135deg,#3E7BE0,#1F5FD0);}
.footer__brand .brand__line1{color:#fff;}
.footer__brand .brand__line2{color:#7C8CA4;}
.footer__desc{font-size:14px;line-height:1.8;color:#93A2B8;max-width:30em;}
.footer__col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;}
.footer__col ul{display:flex;flex-direction:column;gap:10px;}
.footer__col a,.footer__col li{font-size:14px;color:#A9B6C8;line-height:1.7;}
.footer__col a:hover{color:#fff;text-decoration:underline;}
.footer__bottom{
  border-top:1px solid rgba(255,255,255,.10);padding:22px 0 30px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:#7C8CA4;
}

/* ---------- 移动端抽屉 ---------- */
.nav-backdrop{position:fixed;inset:0;background:rgba(15,27,45,.42);opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);z-index:70;}
.nav-backdrop.is-open{opacity:1;visibility:visible;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  :root{--gutter:56px;}
  .hero__content{grid-column:span 12;}
  .hero__media{grid-column:span 12;margin-top:12px;}
  .hero__media img{height:320px;}
  .hero__badge{left:16px;}
  .collection-grid{grid-template-columns:repeat(2,1fr);}
  .collection-card--wide{grid-column:span 2;flex-direction:row;}
  .feature-grid,.news-grid{grid-template-columns:repeat(2,1fr);}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:900px){
  .nav{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);background:#fff;
    flex-direction:column;align-items:stretch;gap:0;margin:0;padding:84px 20px 32px;
    transform:translateX(102%);transition:transform 220ms ease-out;z-index:80;
    box-shadow:-12px 0 32px rgba(15,27,45,.14);overflow-y:auto;
  }
  .nav.is-open{transform:translateX(0);}
  .nav__link{padding:16px 4px;border-bottom:1px solid var(--border);font-size:16px;}
  .nav__link.is-active::after{display:none;}
  .nav__link.is-active{color:var(--primary);}
  .menu-toggle{display:flex;}
  .header__tools .btn{display:none;}
}
@media (max-width:767px){
  :root{--gutter:44px;}
  .container{padding:0 16px;}
  .topbar__note{display:none;}
  .topbar__actions{gap:16px;}
  .hero{padding:40px 0 var(--gutter);}
  .hero__title{font-size:27px;line-height:1.3;}
  .hero__sub{font-size:15px;}
  .hero__stats{grid-template-columns:repeat(2,1fr);gap:20px;}
  .hero__stats li strong{font-size:23px;}
  .section__head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px;}
  .section__head h2{font-size:21px;}
  .collection-grid,.feature-grid,.news-grid{grid-template-columns:1fr;gap:16px;}
  .collection-card--wide{grid-column:span 1;flex-direction:column;}
  .collection-card--wide .collection-card__thumb{flex:none;margin-bottom:18px;}
  .cta-banner{flex-direction:column;align-items:flex-start;padding:26px 22px;}
  .cta-banner__actions{width:100%;flex-direction:column;}
  .cta-banner__actions .btn{width:100%;}
  .faq__q{padding:18px 18px;font-size:15px;}
  .faq__a p{padding:0 18px 18px;}
  .footer__grid{grid-template-columns:1fr;padding:44px 0 32px;gap:28px;}
  .footer__bottom{flex-direction:column;gap:8px;}
  .mini-card{flex:0 0 232px;}
}
@media (max-width:479px){
  .hero__media img{height:230px;}
  .hero__badge{padding:10px 14px;bottom:14px;}
  .hero__badge b{font-size:18px;}
  .btn{height:46px;}
}

/* roulang page: category1 */
:root{
  --primary:#1F5FD0;
  --primary-hover:#17499F;
  --primary-active:#123A80;
  --primary-soft:#EAF1FD;
  --primary-soft-hover:#DCE8FB;
  --secondary:#14B8A6;
  --secondary-soft:#E6F7F5;
  --accent:#FF7A45;
  --accent-soft:#FFF1EB;
  --bg:#FFFFFF;
  --bg-alt:#F6F8FB;
  --dark:#0F1B2D;
  --text:#0F1B2D;
  --text-sub:#4A5568;
  --text-muted:#8A94A6;
  --border:#E4E9F2;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-hero:18px;
  --radius-pill:999px;
  --shadow-sm:0 1px 2px rgba(15,27,45,.04),0 8px 24px rgba(15,27,45,.06);
  --shadow-hover:0 10px 28px rgba(15,27,45,.10);
  --container:1200px;
  --t:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:Inter,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color var(--t),background-color var(--t),border-color var(--t),box-shadow var(--t),transform var(--t);}
a:hover{color:var(--primary-hover);}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;letter-spacing:0;}
p{margin:0;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:all var(--t);white-space:nowrap;
}
.btn--primary{background:var(--primary);color:#fff;border-color:var(--primary);}
.btn--primary:hover{background:var(--primary-hover);border-color:var(--primary-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.btn--primary:active{background:var(--primary-active);border-color:var(--primary-active);transform:translateY(0);}
.btn--ghost{background:#fff;color:var(--primary);border-color:var(--primary);}
.btn--ghost:hover{background:var(--primary-soft);color:var(--primary-hover);border-color:var(--primary-hover);transform:translateY(-2px);}
.btn--dark{background:var(--dark);color:#fff;border-color:var(--dark);}
.btn--dark:hover{background:#1c2c46;color:#fff;transform:translateY(-2px);}
.btn--sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--dark);color:#C7D2E2;font-size:13px;}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:34px;padding-top:6px;padding-bottom:6px;}
.topbar__site{font-weight:600;color:#fff;letter-spacing:.02em;}
.topbar__tip{color:#9FB0C6;}
.topbar__actions{display:flex;align-items:center;gap:18px;}
.topbar__actions a{color:#C7D2E2;font-size:13px;}
.topbar__actions a:hover{color:#fff;text-decoration:underline;text-underline-offset:2px;}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--border);}
.site-header.is-stuck{box-shadow:0 4px 16px rgba(15,27,45,.06);}
.header__inner{display:flex;align-items:center;gap:28px;min-height:70px;padding-top:12px;padding-bottom:12px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);flex:0 0 auto;}
.brand:hover{color:var(--text);}
.brand__mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--primary),#2E86E8);
  color:#fff;font-weight:700;font-size:19px;display:flex;align-items:center;justify-content:center;
}
.brand__text{display:flex;flex-direction:column;line-height:1.15;}
.brand__line1{font-size:16px;font-weight:700;}
.brand__line2{font-size:13px;font-weight:600;color:var(--primary);}
.nav{display:flex;align-items:center;gap:28px;margin-left:auto;}
.nav__link{font-size:15px;font-weight:600;color:var(--text-sub);padding:6px 0;position:relative;}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav__link:hover{color:var(--primary);}
.nav__link:hover::after{transform:scaleX(1);}
.nav__link.is-active{color:var(--primary);}
.nav__link.is-active::after{transform:scaleX(1);}
.header__tools{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.icon-btn{
  width:40px;height:40px;border-radius:var(--radius-btn);border:1px solid var(--border);
  background:#fff;color:var(--text-sub);display:flex;align-items:center;justify-content:center;
}
.icon-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft);}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--radius-btn);border:1px solid var(--border);background:#fff;color:var(--text);align-items:center;justify-content:center;}
.nav-toggle:hover{border-color:var(--primary);color:var(--primary);}

/* ---------- 页头 band ---------- */
.page-band{
  position:relative;color:#fff;overflow:hidden;
  background-color:#123A80;
  background-image:linear-gradient(115deg,rgba(31,95,208,.82),rgba(15,27,45,.68)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.page-band__inner{padding:64px 0 56px;max-width:780px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.78);margin-bottom:18px;}
.breadcrumb a{color:rgba(255,255,255,.85);}
.breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:2px;}
.breadcrumb span[aria-current]{color:rgba(255,255,255,.62);}
.page-band h1{font-size:40px;line-height:1.25;color:#fff;margin-bottom:16px;}
.page-band__desc{font-size:16px;line-height:1.85;color:rgba(255,255,255,.9);max-width:640px;}
.page-band__meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.chip-glass{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);
  font-size:13px;font-weight:500;color:#fff;
}

/* ---------- 通用板块 ---------- */
.section{padding:80px 0;}
.section--alt{background:var(--bg-alt);}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section__head h2{font-size:28px;line-height:1.35;}
.section__head p{margin-top:10px;font-size:15px;color:var(--text-sub);max-width:640px;}
.section__more{font-size:14px;font-weight:600;white-space:nowrap;}

/* ---------- 图文交错 ---------- */
.zigzag{display:flex;flex-direction:column;gap:64px;}
.zigzag__row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.zigzag__row--reverse .zigzag__media{order:2;}
.zigzag__media{
  border-radius:var(--radius-img);overflow:hidden;box-shadow:var(--shadow-sm);
  border:1px solid var(--border);background:#fff;
}
.zigzag__media img{width:100%;height:320px;object-fit:cover;transition:transform 320ms ease-out;}
.zigzag__row:hover .zigzag__media img{transform:scale(1.03);}
.zigzag__body h3{font-size:20px;margin-bottom:14px;}
.zigzag__body p{font-size:16px;color:var(--text-sub);}
.zigzag__list{margin-top:20px;display:flex;flex-direction:column;gap:12px;}
.zigzag__list li{position:relative;padding-left:24px;font-size:15px;color:var(--text-sub);}
.zigzag__list li::before{
  content:"";position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:3px;background:var(--secondary);
}
.zigzag__index{
  display:inline-flex;align-items:center;justify-content:center;min-width:44px;height:26px;padding:0 10px;
  border-radius:var(--radius-pill);background:var(--primary-soft);color:var(--primary);
  font-size:12px;font-weight:600;margin-bottom:14px;
}

/* ---------- 2×2 要点卡 ---------- */
.point-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.point-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-sm);transition:all var(--t);position:relative;overflow:hidden;
}
.point-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--primary);opacity:0;transition:opacity var(--t);}
.point-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.point-card:hover::before{opacity:1;}
.point-card h3{font-size:17px;margin-bottom:10px;}
.point-card p{font-size:15px;color:var(--text-sub);}
.point-card__tag{
  display:inline-block;margin-bottom:14px;padding:4px 12px;border-radius:var(--radius-pill);
  background:var(--secondary-soft);color:#0E8C7E;font-size:12px;font-weight:500;
}

/* ---------- 数据条 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stat{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-sm);
}
.stat__num{font-size:30px;font-weight:700;line-height:1.2;color:var(--primary);}
.stat__num small{font-size:14px;font-weight:600;color:var(--text-muted);margin-left:4px;}
.stat__label{margin-top:6px;font-size:14px;color:var(--text-sub);}

/* ---------- 互链窄条卡 ---------- */
.link-row{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.link-card{
  display:flex;align-items:center;gap:18px;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:20px 24px;box-shadow:var(--shadow-sm);color:var(--text);
}
.link-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);color:var(--text);border-color:#CFDCF3;}
.link-card__ico{
  width:44px;height:44px;border-radius:12px;flex:0 0 auto;
  background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:16px;
}
.link-card__txt strong{display:block;font-size:16px;font-weight:600;margin-bottom:4px;}
.link-card__txt span{font-size:14px;color:var(--text-muted);}
.link-card__arrow{margin-left:auto;color:var(--primary);font-weight:700;}

/* ---------- FAQ ---------- */
.faq{max-width:900px;margin:0 auto;background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-sm);overflow:hidden;}
.faq__item{border-bottom:1px solid var(--border);}
.faq__item:last-child{border-bottom:none;}
.faq__item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 24px;font-size:16px;font-weight:600;color:var(--text);
}
.faq__item summary::-webkit-details-marker{display:none;}
.faq__item summary:hover{color:var(--primary);}
.faq__icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;color:var(--primary);font-weight:600;font-size:16px;
  transition:transform 200ms ease-out,background-color var(--t);
}
.faq__item[open] .faq__icon{transform:rotate(45deg);background:var(--primary-soft);}
.faq__answer{padding:0 24px 22px;font-size:15px;line-height:1.85;color:var(--text-sub);}

/* ---------- CTA 横幅 ---------- */
.cta-band{
  background:var(--primary-soft);border-radius:var(--radius-hero);
  padding:40px 44px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:22px;margin-bottom:8px;}
.cta-band p{font-size:15px;color:var(--text-sub);}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#B9C6D8;margin-top:80px;padding:64px 0 0;}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer__brand .brand__mark{background:linear-gradient(135deg,var(--primary),#2E86E8);}
.footer__brand .brand__line1{color:#fff;}
.footer__brand .brand__line2{color:#7FB2FF;}
.footer__desc{font-size:14px;line-height:1.85;color:#9FB0C6;max-width:340px;}
.footer__col h4{color:#fff;font-size:15px;margin-bottom:16px;}
.footer__col ul{display:flex;flex-direction:column;gap:10px;}
.footer__col a,.footer__col li{font-size:14px;color:#B9C6D8;}
.footer__col a:hover{color:#fff;text-decoration:underline;text-underline-offset:2px;}
.footer__bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8A9AB0;
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav{gap:20px;}
  .zigzag__row{gap:32px;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
  .stats{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .topbar__tip{display:none;}
  .header__inner{min-height:62px;gap:16px;}
  .nav{
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--border);
    box-shadow:0 12px 24px rgba(15,27,45,.08);
    padding:8px 16px 16px;display:none;
  }
  .nav.is-open{display:flex;}
  .nav__link{padding:14px 0;font-size:16px;border-bottom:1px solid var(--border);}
  .nav__link:last-child{border-bottom:none;}
  .nav__link::after{display:none;}
  .nav-toggle{display:flex;}
  .header__tools .btn--sm{display:none;}
  .page-band__inner{padding:44px 0 40px;}
  .page-band h1{font-size:26px;}
  .section{padding:44px 0;}
  .section__head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px;}
  .section__head h2{font-size:21px;}
  .zigzag{gap:40px;}
  .zigzag__row{grid-template-columns:1fr;gap:20px;}
  .zigzag__row--reverse .zigzag__media{order:0;}
  .zigzag__media img{height:220px;}
  .point-grid{grid-template-columns:1fr;gap:16px;}
  .stats{grid-template-columns:1fr;gap:16px;}
  .link-row{grid-template-columns:1fr;gap:16px;}
  .cta-band{padding:28px 22px;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{flex:1 1 auto;}
  .footer__grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .site-footer{padding-top:48px;margin-top:56px;}
}
@media (max-width:479px){
  .page-band h1{font-size:24px;}
  .cta-band__actions .btn{width:100%;}
  .faq__item summary{padding:18px 18px;font-size:15px;}
  .faq__answer{padding:0 18px 18px;}
}

/* roulang page: article */
:root{
  --primary:#1F5FD0;
  --primary-hover:#17499F;
  --primary-active:#123A80;
  --primary-soft:#EAF1FD;
  --primary-soft-hover:#DCE8FB;
  --secondary:#14B8A6;
  --secondary-soft:#E6F7F5;
  --accent:#FF7A45;
  --accent-soft:#FFF1EB;
  --bg:#FFFFFF;
  --bg-alt:#F6F8FB;
  --dark:#0F1B2D;
  --text:#0F1B2D;
  --text-2:#4A5568;
  --text-3:#8A94A6;
  --border:#E4E9F2;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-hero:18px;
  --shadow-sm:0 1px 2px rgba(15,27,45,.04), 0 8px 24px rgba(15,27,45,.06);
  --shadow-hover:0 10px 28px rgba(15,27,45,.10);
  --tr:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35;color:var(--text)}
h1{font-size:40px;line-height:1.25;font-weight:700}
h2{font-size:28px}
h3{font-size:20px}
h4{font-size:17px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:color var(--tr),background-color var(--tr),border-color var(--tr)}
a:hover{color:var(--primary-hover)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
time{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--dark);color:rgba(255,255,255,.82);font-size:13px}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:34px}
.topbar__site{font-weight:600;letter-spacing:.2px;color:#fff}
.topbar__note{color:rgba(255,255,255,.66)}
.topbar__actions{display:flex;align-items:center;gap:18px}
.topbar__actions a{color:rgba(255,255,255,.82);font-size:13px}
.topbar__actions a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--border);transition:box-shadow var(--tr)}
.site-header.is-scrolled{box-shadow:0 4px 16px rgba(15,27,45,.06)}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text)}
.brand:hover{color:var(--text)}
.brand__mark{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:11px;background:var(--primary);color:#fff;font-weight:700;font-size:18px;letter-spacing:.5px;box-shadow:0 6px 16px rgba(31,95,208,.28)}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__line1{font-size:16px;font-weight:700;letter-spacing:.2px}
.brand__line2{font-size:12px;font-weight:500;color:var(--text-3);letter-spacing:1.5px}
.nav{display:flex;align-items:center;gap:28px;flex:1;justify-content:center}
.nav__link{position:relative;font-size:15px;font-weight:600;color:var(--text-2);padding:6px 0}
.nav__link:hover{color:var(--primary)}
.nav__link.is-active{color:var(--primary)}
.nav__link.is-active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;background:var(--primary)}
.header__actions{display:flex;align-items:center;gap:12px}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);color:var(--text-2);background:#fff;transition:all var(--tr)}
.icon-btn:hover{color:var(--primary);border-color:var(--primary-soft-hover);background:var(--primary-soft)}
.icon-btn svg{width:18px;height:18px}
.menu-btn{display:none;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);color:var(--text-2);background:#fff}
.menu-btn svg{width:20px;height:20px}
.search-panel{border-top:1px solid var(--border);background:var(--bg-alt)}
.search-panel[hidden]{display:none}
.search-panel__inner{display:flex;gap:12px;padding-top:14px;padding-bottom:14px}
.search-panel .input{flex:1}

/* ---------- 按钮 / 表单 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;transition:all var(--tr);white-space:nowrap}
.btn--primary{background:var(--primary);color:#fff;box-shadow:0 6px 18px rgba(31,95,208,.24)}
.btn--primary:hover{background:var(--primary-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn--primary:active{background:var(--primary-active);transform:translateY(0)}
.btn--ghost{background:#fff;color:var(--primary);border-color:var(--primary-soft-hover)}
.btn--ghost:hover{background:var(--primary-soft);color:var(--primary-hover);border-color:var(--primary)}
.btn--sm{min-height:40px;padding:0 16px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none}
.input{min-height:44px;width:100%;padding:0 14px;font-size:15px;color:var(--text);background:#fff;border:1px solid var(--border);border-radius:var(--radius-btn);transition:all var(--tr)}
.input::placeholder{color:var(--text-3)}
.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}

/* ---------- 文章页头 ---------- */
.page-band{position:relative;background:var(--dark) url('/assets/images/backpic/back-1.png') center/cover no-repeat;padding:52px 0 46px;color:#fff}
.page-band::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,27,45,.86),rgba(15,27,45,.72))}
.page-band .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.66);margin-bottom:18px}
.breadcrumb a{color:rgba(255,255,255,.82)}
.breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.breadcrumb .is-current{color:rgba(255,255,255,.58);max-width:560px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.page-band h1{color:#fff;max-width:900px;font-size:34px;line-height:1.35;margin-bottom:18px}
.band__meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13px;color:rgba(255,255,255,.72)}
.band__meta-item{display:inline-flex;align-items:center;gap:6px}
.band__meta-item + .band__meta-item::before{content:"";display:inline-block;width:1px;height:12px;background:rgba(255,255,255,.28);margin-right:12px}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;font-size:12px;font-weight:500;line-height:1}
.badge--cat{background:rgba(20,184,166,.2);color:#7FE3D8}
.badge--plain{background:var(--bg-alt);color:var(--text-2);border:1px solid var(--border)}

/* ---------- 文章正文 ---------- */
main{display:block}
.article__wrap{max-width:820px;margin:0 auto;padding:44px 0 56px}
.prose{font-size:17px;line-height:1.9;color:var(--text-2)}
.prose h2{font-size:24px;color:var(--text);margin:40px 0 16px;padding-left:14px;border-left:4px solid var(--primary);line-height:1.45}
.prose h3{font-size:20px;color:var(--text);margin:30px 0 12px;line-height:1.5}
.prose h4{font-size:17px;color:var(--text);margin:24px 0 10px}
.prose p{margin:0 0 18px}
.prose strong{color:var(--text);font-weight:600}
.prose ul,.prose ol{margin:0 0 18px;padding-left:24px}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin:6px 0}
.prose li::marker{color:var(--primary)}
.prose img{border-radius:var(--radius-img);margin:24px auto;width:100%;height:auto}
.prose figure{margin:24px 0}
.prose figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:8px}
.prose blockquote{margin:24px 0;padding:16px 20px;background:var(--primary-soft);border-left:4px solid var(--primary);border-radius:0 var(--radius-img) var(--radius-img) 0;color:var(--text)}
.prose blockquote p:last-child{margin-bottom:0}
.prose a{color:var(--primary);text-decoration:underline;text-underline-offset:2px}
.prose a:hover{color:var(--primary-hover)}
.prose table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;display:block;overflow-x:auto}
.prose th,.prose td{border:1px solid var(--border);padding:10px 14px;text-align:left;white-space:nowrap}
.prose th{background:var(--bg-alt);font-weight:600;color:var(--text)}
.prose code{background:var(--bg-alt);border:1px solid var(--border);border-radius:6px;padding:1px 6px;font-size:15px}

/* ---------- 空态 ---------- */
.empty-state{display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center;padding:48px 24px;border:1px solid var(--border);border-radius:var(--radius-card);background:var(--bg-alt)}
.empty-state svg{width:64px;height:64px;color:var(--primary);opacity:.24}
.empty-state p{color:var(--text-2);font-size:15px}

/* ---------- 文末标签与操作 ---------- */
.article__foot{margin-top:40px;padding-top:24px;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px}
.tag-list{display:flex;flex-wrap:wrap;gap:10px}
.tag{display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;background:var(--secondary-soft);color:#0E8F84;font-size:13px;font-weight:500;transition:all var(--tr)}
.tag:hover{background:#D5F1EE;color:#0B7268;transform:translateY(-1px)}
.article__actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 板块 ---------- */
.section{padding:72px 0}
.section--alt{background:var(--bg-alt)}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px}
.section__head h2{font-size:26px}
.section__head p{color:var(--text-2);font-size:15px;margin-top:8px}
.link-more{font-size:14px;font-weight:600;color:var(--primary);white-space:nowrap}
.link-more:hover{color:var(--primary-hover);text-decoration:underline;text-underline-offset:4px}
.grid{display:grid;gap:24px}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

/* ---------- 相关栏目卡 ---------- */
.rel-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr)}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-soft-hover)}
.rel-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.rel-card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px}
.rel-card__body h3{font-size:17px;color:var(--text)}
.rel-card:hover .rel-card__body h3{color:var(--primary)}
.rel-card__body p{font-size:14px;color:var(--text-2);line-height:1.7}
.rel-card__meta{font-size:13px;color:var(--text-3);padding-top:12px;border-top:1px solid var(--border);margin-top:2px}

/* ---------- 上下篇 ---------- */
.pager{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.pager__item{display:flex;flex-direction:column;gap:6px;padding:20px 22px;background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-sm);transition:all var(--tr)}
.pager__item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-soft-hover)}
.pager__dir{font-size:13px;color:var(--text-3)}
.pager__title{font-size:16px;font-weight:600;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pager__item:hover .pager__title{color:var(--primary)}
.pager__item--next{text-align:right;align-items:flex-end}
.pager__back{text-align:center;margin-top:28px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 28px;font-size:14px}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer__brand .brand__mark{background:var(--primary)}
.footer__brand .brand__text .brand__line1{color:#fff;font-size:16px;font-weight:700}
.footer__brand .brand__text .brand__line2{color:rgba(255,255,255,.55);font-size:12px;letter-spacing:1.5px}
.footer__desc{color:rgba(255,255,255,.6);line-height:1.8;max-width:340px}
.footer__col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer__col ul{display:flex;flex-direction:column;gap:10px}
.footer__col li{color:rgba(255,255,255,.62)}
.footer__col a{color:rgba(255,255,255,.72)}
.footer__col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer__bottom{margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;color:rgba(255,255,255,.52);flex-wrap:wrap}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  h1{font-size:32px}
  .page-band h1{font-size:28px}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
  .article__wrap{padding:36px 0 48px}
}
@media (max-width:960px){
  .nav{position:absolute;top:100%;left:0;right:0;display:none;flex-direction:column;align-items:flex-start;gap:4px;background:#fff;border-bottom:1px solid var(--border);box-shadow:0 12px 28px rgba(15,27,45,.10);padding:12px 24px 20px}
  .nav.is-open{display:flex}
  .nav__link{width:100%;padding:12px 0;border-bottom:1px solid var(--border);font-size:15px}
  .nav__link:last-child{border-bottom:0}
  .nav__link.is-active::after{display:none}
  .menu-btn{display:inline-flex}
  .header__inner{height:62px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  h1{font-size:26px}
  h2{font-size:22px}
  .section{padding:48px 0}
  .section__head{flex-direction:column;align-items:flex-start;gap:10px}
  .page-band{padding:36px 0 32px}
  .page-band h1{font-size:23px;margin-bottom:14px}
  .breadcrumb .is-current{white-space:normal;max-width:100%}
  .band__meta{gap:10px}
  .band__meta-item + .band__meta-item::before{display:none}
  .grid,.grid--3{grid-template-columns:1fr;gap:16px}
  .pager{grid-template-columns:1fr;gap:14px}
  .pager__item--next{text-align:left;align-items:flex-start}
  .article__wrap{padding:28px 0 40px}
  .prose{font-size:16px;line-height:1.85}
  .prose h2{font-size:20px;margin:32px 0 14px}
  .prose h3{font-size:18px}
  .article__foot{flex-direction:column;align-items:flex-start}
  .article__actions{width:100%}
  .article__actions .btn{flex:1}
  .footer__grid{grid-template-columns:1fr;gap:28px;padding-bottom:8px}
  .site-footer{padding:48px 0 24px}
  .topbar__note{display:none}
  .topbar__actions a:nth-child(2){display:none}
}
@media (max-width:479px){
  .header__actions .btn--sm{display:none}
  .search-panel__inner{flex-direction:column}
  .prose table{font-size:14px}
}

/* roulang page: category2 */
:root{
  --primary:#1F5FD0;
  --primary-dark:#17499F;
  --primary-active:#123A80;
  --primary-soft:#EAF1FD;
  --primary-soft-hover:#DCE8FB;
  --secondary:#14B8A6;
  --secondary-soft:#E6F7F5;
  --accent:#FF7A45;
  --accent-soft:#FFF1EB;
  --ink:#0F1B2D;
  --text:#0F1B2D;
  --text-2:#4A5568;
  --text-3:#8A94A6;
  --bg:#FFFFFF;
  --bg-alt:#F6F8FB;
  --dark:#0F1B2D;
  --border:#E4E9F2;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-hero:18px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(15,27,45,.04),0 8px 24px rgba(15,27,45,.06);
  --shadow-2:0 10px 28px rgba(15,27,45,.10);
  --ease:180ms ease-out;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color var(--ease),text-decoration-color var(--ease);}
a:hover{color:var(--primary-dark);text-decoration:underline;text-underline-offset:2px;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:0;}
h1{font-size:40px;line-height:1.25;}
h2{font-size:28px;line-height:1.35;font-weight:700;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
h4{font-size:17px;line-height:1.5;font-weight:600;}
p{margin:0 0 16px;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:80px 0;}
.section--alt{background:var(--bg-alt);}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.section__head p{margin:8px 0 0;color:var(--text-2);font-size:15px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--secondary);
  background:var(--secondary-soft);border-radius:var(--r-pill);
  padding:5px 12px;margin-bottom:14px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--secondary);}

/* 顶部信息条 */
.topbar{background:var(--dark);color:#C7D3E4;font-size:13px;}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:34px;}
.topbar__domain{font-weight:600;color:#FFFFFF;letter-spacing:.4px;}
.topbar__note{color:#93A3BA;}
.topbar__actions{display:flex;align-items:center;gap:18px;}
.topbar__actions a{color:#E4ECF7;font-size:13px;}
.topbar__actions a:hover{color:#FFFFFF;text-decoration:underline;text-underline-offset:3px;}

/* 主导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#FFFFFF;border-bottom:1px solid var(--border);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 4px 16px rgba(15,27,45,.06);}
.header__inner{display:flex;align-items:center;gap:28px;min-height:68px;}
.brand{display:inline-flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;}
.brand:hover{text-decoration:none;color:var(--ink);}
.brand__mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  background:linear-gradient(135deg,var(--primary),#3D82E6);
  color:#FFFFFF;font-weight:700;font-size:19px;
  display:flex;align-items:center;justify-content:center;
}
.brand__text{display:flex;flex-direction:column;line-height:1.15;}
.brand__line1{font-size:16px;font-weight:700;color:var(--ink);}
.brand__line2{font-size:12px;font-weight:500;color:var(--text-3);letter-spacing:.6px;}
.nav{display:flex;align-items:center;gap:28px;margin-left:auto;}
.nav__link{
  position:relative;font-size:15px;font-weight:600;color:var(--text-2);
  padding:6px 0;text-decoration:none;
}
.nav__link:hover{color:var(--primary);text-decoration:none;}
.nav__link.is-active{color:var(--primary);}
.nav__link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;
  border-radius:2px;background:var(--primary);
}
.header__actions{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--border);
  background:#FFFFFF;color:var(--text-2);display:flex;align-items:center;justify-content:center;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.icon-btn:hover{background:var(--primary-soft);color:var(--primary);border-color:var(--primary-soft-hover);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--border);background:#FFFFFF;color:var(--ink);
  align-items:center;justify-content:center;margin-left:auto;
}
.nav-toggle__bars{position:relative;width:20px;height:14px;}
.nav-toggle__bars span{position:absolute;left:0;width:20px;height:2px;border-radius:2px;background:currentColor;transition:var(--ease);}
.nav-toggle__bars span:nth-child(1){top:0;}
.nav-toggle__bars span:nth-child(2){top:6px;}
.nav-toggle__bars span:nth-child(3){top:12px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
  text-decoration:none;white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-2px);}
.btn--primary{background:var(--primary);color:#FFFFFF;box-shadow:0 6px 16px rgba(31,95,208,.18);}
.btn--primary:hover{background:var(--primary-dark);color:#FFFFFF;}
.btn--primary:active{background:var(--primary-active);transform:translateY(0);}
.btn--ghost{background:#FFFFFF;color:var(--primary);border-color:#BBD0F2;}
.btn--ghost:hover{background:var(--primary-soft);color:var(--primary-dark);}
.btn--soft{background:var(--primary-soft);color:var(--primary-dark);}
.btn--soft:hover{background:var(--primary-soft-hover);}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;}

/* 标签 */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:var(--r-pill);
  font-size:12px;font-weight:500;line-height:1.6;
  background:#F1F4F9;color:var(--text-2);
}
.tag--cate{background:var(--secondary-soft);color:#0E8E80;}
.tag--hint{background:var(--accent-soft);color:#D9541F;}

/* 页头 band */
.page-head{
  position:relative;color:#FFFFFF;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(18,58,128,.78),rgba(18,58,128,.62)),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
}
.page-head__inner{padding:64px 0 60px;max-width:760px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.78);margin-bottom:18px;}
.breadcrumb a{color:rgba(255,255,255,.88);}
.breadcrumb a:hover{color:#FFFFFF;}
.breadcrumb span.sep{opacity:.6;}
.breadcrumb .current{color:rgba(255,255,255,.72);}
.page-head h1{color:#FFFFFF;font-size:38px;line-height:1.3;}
.page-head p{margin:16px 0 0;font-size:16px;line-height:1.8;color:rgba(255,255,255,.86);}
.page-head__meta{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}
.page-head__meta .chip{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
  border-radius:var(--r-pill);padding:7px 14px;font-size:13px;color:#FFFFFF;
}

/* 两栏布局 */
.layout{display:grid;grid-template-columns:3fr 9fr;gap:40px;align-items:start;}

/* 锚点侧栏 */
.anchor{
  position:sticky;top:96px;
  background:#FFFFFF;border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);padding:20px 18px;
}
.anchor__title{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:12px;padding-left:10px;border-left:3px solid var(--primary);line-height:1.2;}
.anchor__list{display:flex;flex-direction:column;gap:2px;}
.anchor__link{
  display:block;padding:10px 12px;border-radius:8px;font-size:14px;font-weight:500;
  color:var(--text-2);border-left:3px solid transparent;text-decoration:none;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.anchor__link:hover{background:var(--bg-alt);color:var(--primary);text-decoration:none;}
.anchor__link.is-active{background:var(--primary-soft);color:var(--primary-dark);border-left-color:var(--primary);font-weight:600;}
.anchor__foot{margin-top:16px;padding-top:16px;border-top:1px solid var(--border);font-size:13px;color:var(--text-3);}

/* 功能卡片堆叠 */
.stack{display:flex;flex-direction:column;gap:24px;}
.feature-card{
  display:grid;grid-template-columns:200px 1fr;gap:24px;
  background:#FFFFFF;border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);padding:24px;
  transition:box-shadow var(--ease),transform var(--ease);
  scroll-margin-top:100px;
}
.feature-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.feature-card__media{
  width:200px;height:100%;min-height:150px;overflow:hidden;border-radius:var(--r-img);
}
.feature-card__media img{width:100%;height:100%;object-fit:cover;border-radius:var(--r-img);}
.feature-card__body h3{margin-bottom:10px;}
.feature-card__body > p{color:var(--text-2);font-size:15px;margin-bottom:14px;}
.feature-card__tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;}
.feature-card__list{display:flex;flex-direction:column;gap:8px;}
.feature-card__list li{
  position:relative;padding-left:20px;font-size:14.5px;color:var(--text-2);line-height:1.7;
}
.feature-card__list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:var(--secondary);
}
.feature-card__foot{
  margin-top:16px;padding-top:14px;border-top:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;color:var(--text-3);
}

/* 对比表 */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--r-card);background:#FFFFFF;box-shadow:var(--shadow-1);}
table{width:100%;border-collapse:collapse;min-width:680px;}
caption{text-align:left;padding:20px 24px 0;font-size:15px;color:var(--text-2);}
th,td{padding:16px 24px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--border);}
th{background:var(--bg-alt);font-weight:600;color:var(--ink);font-size:14px;}
tbody tr:last-child td{border-bottom:none;}
tbody tr:hover td{background:#FAFCFF;}
td strong{color:var(--primary-dark);font-weight:600;}

/* FAQ */
.faq{background:#FFFFFF;border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-1);overflow:hidden;}
.faq__item{border-bottom:1px solid var(--border);}
.faq__item:last-child{border-bottom:none;}
.faq__item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;font-size:16px;font-weight:600;color:var(--ink);
}
.faq__item summary::-webkit-details-marker{display:none;}
.faq__sign{position:relative;width:18px;height:18px;flex:0 0 18px;}
.faq__sign::before,.faq__sign::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform var(--ease);}
.faq__sign::before{left:0;top:8px;width:18px;height:2px;}
.faq__sign::after{left:8px;top:0;width:2px;height:18px;}
.faq__item[open] .faq__sign::after{transform:scaleY(0);}
.faq__answer{padding:0 24px 20px;color:var(--text-2);font-size:15px;line-height:1.8;max-width:900px;}

/* CTA 横幅 */
.cta-band{
  background:var(--primary-soft);border:1px solid var(--primary-soft-hover);
  border-radius:var(--r-hero);padding:36px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band h2{font-size:24px;margin-bottom:8px;}
.cta-band p{margin:0;color:var(--text-2);font-size:15px;}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap;}

/* 页脚 */
.site-footer{background:var(--dark);color:#B8C5D8;padding:64px 0 0;margin-top:0;}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;}
.footer__brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer__brand .brand__mark{width:38px;height:38px;flex:0 0 38px;border-radius:11px;background:linear-gradient(135deg,var(--primary),#3D82E6);color:#FFFFFF;font-weight:700;font-size:19px;display:flex;align-items:center;justify-content:center;}
.footer__brand .brand__text{display:flex;flex-direction:column;line-height:1.15;}
.footer__brand .brand__line1{font-size:16px;font-weight:700;color:#FFFFFF;}
.footer__brand .brand__line2{font-size:12px;color:#8FA0B8;letter-spacing:.6px;}
.footer__desc{font-size:14px;line-height:1.8;color:#9AABC2;margin:0;max-width:340px;}
.footer__col h4{color:#FFFFFF;font-size:15px;margin-bottom:16px;font-weight:600;}
.footer__col ul{display:flex;flex-direction:column;gap:10px;}
.footer__col li{font-size:14px;color:#9AABC2;}
.footer__col a{color:#B8C5D8;font-size:14px;}
.footer__col a:hover{color:#FFFFFF;text-decoration:underline;text-underline-offset:3px;}
.footer__bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:#8FA0B8;
}

/* 响应式 */
@media (max-width:1023px){
  .layout{grid-template-columns:1fr;gap:28px;}
  .anchor{position:static;}
  .anchor__list{flex-direction:row;overflow-x:auto;gap:8px;padding-bottom:4px;}
  .anchor__link{
    white-space:nowrap;border-left:none;border-radius:var(--r-pill);
    background:var(--bg-alt);padding:9px 16px;
  }
  .anchor__link.is-active{background:var(--primary);color:#FFFFFF;border-left:none;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding:56px 0;}
  h2{font-size:24px;}
  .page-head h1{font-size:32px;}
}
@media (max-width:767px){
  .nav{
    display:none;position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;
    background:#FFFFFF;border-bottom:1px solid var(--border);
    box-shadow:0 12px 28px rgba(15,27,45,.10);padding:8px 16px 16px;
  }
  .nav.is-open{display:flex;}
  .nav__link{padding:14px 4px;border-bottom:1px solid var(--border);font-size:16px;}
  .nav__link:last-child{border-bottom:none;}
  .nav__link.is-active::after{display:none;}
  .nav-toggle{display:flex;}
  .header__actions .icon-btn{display:none;}
  .header__inner{position:relative;gap:12px;}
  .topbar__note{display:none;}
  .page-head__inner{padding:44px 0 44px;}
  .page-head h1{font-size:26px;}
  .page-head p{font-size:15px;}
  .hero{grid-template-columns:1fr;}
  .feature-card{grid-template-columns:1fr;padding:18px;}
  .feature-card__media{width:100%;height:180px;min-height:0;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{flex:1;min-width:140px;}
  .footer__bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .section{padding:40px 0;}
  .stack{gap:16px;}
  h1{font-size:24px;}
  h2{font-size:21px;}
  .brand__line1{font-size:15px;}
  .footer__grid{grid-template-columns:1fr;gap:28px;}
  .section__head{flex-direction:column;align-items:flex-start;gap:12px;}
  .btn{width:100%;}
  .cta-band__actions .btn{width:100%;}
}

/* roulang page: category3 */
:root{
  --primary:#1F5FD0;
  --primary-hover:#17499F;
  --primary-active:#123A80;
  --primary-soft:#EAF1FD;
  --primary-soft-hover:#DCE8FB;
  --secondary:#14B8A6;
  --secondary-deep:#0E8F82;
  --secondary-soft:#E6F7F5;
  --accent:#FF7A45;
  --accent-soft:#FFF1EB;
  --ink:#0F1B2D;
  --text:#0F1B2D;
  --muted:#4A5568;
  --weak:#8A94A6;
  --bg:#FFFFFF;
  --bg-alt:#F6F8FB;
  --dark:#0F1B2D;
  --border:#E4E9F2;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-pill:999px;
  --shadow-sm:0 1px 2px rgba(15,27,45,.04), 0 8px 24px rgba(15,27,45,.06);
  --shadow-hover:0 10px 28px rgba(15,27,45,.10);
  --container:1200px;
  --ease:180ms ease-out;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:var(--primary);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--primary-hover);text-decoration:underline;text-underline-offset:2px;}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:none;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}

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

/* ============ 顶部信息条 ============ */
.topbar{background:var(--dark);color:#C7D2E4;font-size:13px;}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:34px;}
.topbar__site{font-weight:600;color:#EAF1FD;letter-spacing:.2px;}
.topbar__note{color:#9FB0C9;}
.topbar__actions{display:flex;align-items:center;gap:18px;}
.topbar__actions a{color:#C7D2E4;font-size:13px;}
.topbar__actions a:hover{color:#fff;text-decoration:underline;}

/* ============ 主导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 4px 16px rgba(15,27,45,.06);}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:68px;position:relative;}

.brand{display:flex;align-items:center;gap:10px;text-decoration:none!important;color:var(--ink);}
.brand__mark{
  width:38px;height:38px;flex:none;border-radius:11px;
  background:linear-gradient(135deg,var(--primary),#3A7BE8);
  color:#fff;font-weight:700;font-size:18px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 14px rgba(31,95,208,.26);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15;}
.brand__line1{font-size:15px;font-weight:700;color:var(--ink);}
.brand__line2{font-size:13px;font-weight:500;color:var(--muted);letter-spacing:.6px;}

.nav{display:flex;align-items:center;gap:28px;}
.nav__link{
  position:relative;font-size:15px;font-weight:600;color:var(--muted);
  padding:6px 0;text-decoration:none!important;white-space:nowrap;
}
.nav__link:hover{color:var(--primary);}
.nav__link.is-active{color:var(--primary);}
.nav__link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;background:var(--primary);
}

.header__actions{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--border);
  color:var(--muted);display:inline-flex;align-items:center;justify-content:center;
  transition:all var(--ease);
}
.icon-btn:hover{color:var(--primary);border-color:var(--primary);background:var(--primary-soft);}
.icon-btn:active{background:var(--primary-soft-hover);}
.menu-btn{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);
  color:var(--ink);align-items:center;justify-content:center;transition:all var(--ease);
}
.menu-btn:hover{border-color:var(--primary);color:var(--primary);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:all var(--ease);text-decoration:none!important;white-space:nowrap;
}
.btn--primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(31,95,208,.24);}
.btn--primary:hover{background:var(--primary-hover);color:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(31,95,208,.28);}
.btn--primary:active{background:var(--primary-active);transform:translateY(0);}
.btn--ghost{background:#fff;color:var(--primary);border-color:var(--primary);}
.btn--ghost:hover{background:var(--primary-soft);color:var(--primary-hover);transform:translateY(-2px);}
.btn--ghost:active{background:var(--primary-soft-hover);transform:translateY(0);}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn--disabled,.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none!important;box-shadow:none;}

/* ============ 页面头图 ============ */
.page-band{
  position:relative;color:#fff;
  background-image:linear-gradient(104deg, rgba(15,27,45,.88) 0%, rgba(31,95,208,.70) 62%, rgba(20,184,166,.52) 100%), url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.page-band__inner{padding:56px 0 60px;max-width:840px;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72);}
.breadcrumb a{color:rgba(255,255,255,.88);text-decoration:none;}
.breadcrumb a:hover{color:#fff;text-decoration:underline;}
.breadcrumb .sep{color:rgba(255,255,255,.45);}
.breadcrumb .is-current{color:rgba(255,255,255,.62);}
.page-band h1{
  font-size:40px;line-height:1.25;font-weight:700;
  margin:18px 0 14px;letter-spacing:0;
}
.page-band__desc{font-size:17px;line-height:1.8;color:rgba(255,255,255,.86);max-width:680px;}
.page-band__tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.page-band__tags span{
  display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 14px;
  border-radius:var(--radius-pill);font-size:13px;font-weight:500;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);color:#fff;
}

/* ============ 板块 ============ */
.section{padding:80px 0;}
.section--alt{background:var(--bg-alt);}
.section__head{max-width:720px;margin-bottom:40px;}
.section__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--secondary-deep);
  background:var(--secondary-soft);border-radius:var(--radius-pill);
  padding:5px 14px;margin-bottom:14px;
}
.section__eyebrow i{font-size:12px;}
h2{font-size:28px;line-height:1.35;font-weight:700;color:var(--ink);}
.section__desc{margin-top:14px;font-size:16px;color:var(--muted);}

/* ============ 速览数据 ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.stat{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-sm);transition:all var(--ease);
}
.stat:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.stat__num{font-size:30px;font-weight:700;color:var(--primary);line-height:1.2;letter-spacing:-.4px;}
.stat__num small{font-size:14px;font-weight:600;color:var(--secondary-deep);margin-left:4px;}
.stat__label{margin-top:8px;font-size:14px;color:var(--muted);}

/* ============ 步骤时间轴 ============ */
.timeline{position:relative;max-width:900px;}
.timeline::before{
  content:"";position:absolute;left:19px;top:14px;bottom:14px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--primary),var(--secondary));
}
.timeline__item{position:relative;padding-left:68px;padding-bottom:30px;}
.timeline__item:last-child{padding-bottom:0;}
.timeline__dot{
  position:absolute;left:0;top:0;width:40px;height:40px;border-radius:50%;
  background:#fff;border:2px solid var(--primary);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;
  box-shadow:0 4px 12px rgba(31,95,208,.14);
}
.timeline__item:nth-child(even) .timeline__dot{border-color:var(--secondary);color:var(--secondary-deep);box-shadow:0 4px 12px rgba(20,184,166,.16);}
.step-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:24px 26px;box-shadow:var(--shadow-sm);transition:all var(--ease);
}
.step-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.step-card h3{font-size:18px;font-weight:600;color:var(--ink);margin-bottom:10px;}
.step-card p{font-size:15px;color:var(--muted);line-height:1.8;}
.step-card__meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;}

/* ============ 标签 ============ */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 11px;border-radius:var(--radius-pill);
  font-size:12px;font-weight:500;line-height:1;
}
.tag--soft{background:var(--secondary-soft);color:var(--secondary-deep);}
.tag--gray{background:#F1F4F9;color:var(--muted);}
.tag--accent{background:var(--accent-soft);color:#D95B22;}

/* ============ 场景宽卡（两列） ============ */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.scene-card{
  display:grid;grid-template-columns:200px 1fr;gap:22px;align-items:center;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:20px;box-shadow:var(--shadow-sm);transition:all var(--ease);
}
.scene-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.scene-card img{width:100%;height:148px;object-fit:cover;border-radius:var(--radius-img);}
.scene-card h3{font-size:17px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.scene-card p{font-size:14px;color:var(--muted);line-height:1.75;}
.scene-card .tag{margin-top:12px;}

/* ============ 整宽提示块 ============ */
.notice{
  display:grid;grid-template-columns:1fr 260px;gap:32px;align-items:center;
  background:var(--primary-soft);border-left:4px solid var(--primary);
  border-radius:var(--radius-card);padding:34px 36px;
}
.notice h2{font-size:24px;}
.notice ul{margin-top:18px;display:grid;gap:12px;}
.notice li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--muted);}
.notice li i{color:var(--primary);font-size:14px;margin-top:6px;flex:none;}
.notice__media img{width:100%;height:180px;object-fit:cover;border-radius:var(--radius-img);box-shadow:var(--shadow-sm);}

/* ============ FAQ ============ */
.faq{display:grid;gap:14px;max-width:900px;}
.faq__item{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);overflow:hidden;transition:box-shadow var(--ease);
}
.faq__item[open]{box-shadow:var(--shadow-hover);}
.faq__item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--ink);transition:color var(--ease);
}
.faq__item summary::-webkit-details-marker{display:none;}
.faq__item summary:hover{color:var(--primary);}
.faq__icon{position:relative;width:18px;height:18px;flex:none;}
.faq__icon::before{content:"";position:absolute;left:0;top:8px;width:18px;height:2px;border-radius:2px;background:var(--primary);}
.faq__icon::after{content:"";position:absolute;left:8px;top:0;width:2px;height:18px;border-radius:2px;background:var(--primary);transition:transform 200ms ease-out;}
.faq__item[open] .faq__icon::after{transform:scaleY(0);}
.faq__body{padding:0 24px 22px;font-size:15px;line-height:1.85;color:var(--muted);}

/* ============ 相关栏目与 CTA ============ */
.related{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-bottom:40px;}
.related__card{
  display:flex;align-items:center;gap:20px;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:18px 22px;box-shadow:var(--shadow-sm);transition:all var(--ease);
  text-decoration:none!important;
}
.related__card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.related__card img{width:88px;height:66px;object-fit:cover;border-radius:10px;flex:none;}
.related__card h3{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:6px;}
.related__card:hover h3{color:var(--primary);}
.related__card p{font-size:13px;color:var(--weak);}
.related__arrow{margin-left:auto;color:var(--primary);font-size:14px;}

.cta-banner{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  background:var(--primary-soft);border:1px solid #D6E4FA;border-radius:18px;
  padding:34px 38px;
}
.cta-banner h2{font-size:22px;}
.cta-banner p{margin-top:8px;font-size:15px;color:var(--muted);}
.cta-banner__actions{display:flex;gap:14px;flex:none;}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:#9FB0C9;padding:64px 0 0;margin-top:0;}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer__brand .brand__mark{box-shadow:none;}
.footer__brand .brand__line1{color:#fff;}
.footer__brand .brand__line2{color:#9FB0C9;}
.footer__desc{font-size:14px;line-height:1.8;color:#8FA1BB;max-width:340px;}
.footer__col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer__col ul{display:grid;gap:10px;}
.footer__col li{font-size:14px;color:#8FA1BB;}
.footer__col a{color:#8FA1BB;font-size:14px;}
.footer__col a:hover{color:#fff;text-decoration:underline;}
.footer__bottom{
  border-top:1px solid rgba(255,255,255,.10);
  padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:#7C8DA8;
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .section{padding:56px 0;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .scene-card{grid-template-columns:160px 1fr;gap:18px;}
  .scene-card img{height:132px;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
  .page-band h1{font-size:32px;}
}
@media (max-width:900px){
  .nav{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--border);
    box-shadow:0 12px 24px rgba(15,27,45,.08);
    padding:8px 16px 16px;display:none;
  }
  .nav.is-open{display:flex;}
  .nav__link{padding:14px 4px;border-bottom:1px solid var(--border);font-size:15px;}
  .nav__link:last-child{border-bottom:none;}
  .nav__link.is-active::after{display:none;}
  .menu-btn{display:inline-flex;}
  .header__actions .btn--sm{display:none;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .topbar__note{display:none;}
  .topbar__actions a:nth-child(2){display:none;}
  .page-band__inner{padding:40px 0 44px;}
  .page-band h1{font-size:26px;}
  .page-band__desc{font-size:15px;}
  h2{font-size:21px;}
  .section{padding:40px 0;}
  .section__head{margin-bottom:28px;}
  .scene-grid{grid-template-columns:1fr;}
  .scene-card{grid-template-columns:1fr;}
  .scene-card img{height:170px;}
  .notice{grid-template-columns:1fr;padding:26px 22px;}
  .notice__media{display:none;}
  .related{grid-template-columns:1fr;margin-bottom:28px;}
  .cta-banner{flex-direction:column;align-items:flex-start;padding:26px 22px;}
  .cta-banner__actions{width:100%;flex-direction:column;}
  .cta-banner__actions .btn{width:100%;}
  .timeline__item{padding-left:56px;padding-bottom:24px;}
  .timeline::before{left:15px;}
  .timeline__dot{width:32px;height:32px;font-size:13px;}
  .step-card{padding:20px;}
  .footer__grid{grid-template-columns:1fr;gap:28px;}
  .footer__bottom{flex-direction:column;align-items:flex-start;gap:6px;}
  .btn{height:46px;}
}
@media (max-width:479px){
  .stats{grid-template-columns:1fr;}
  .brand__line1{font-size:14px;}
  .brand__line2{font-size:12px;}
  .page-band h1{font-size:23px;}
  .cta-banner h2{font-size:19px;}
}