/* roulang page: index */
:root{
  --c-primary:#1F5AA8;
  --c-primary-deep:#143C74;
  --c-primary-tint:#E9F1FB;
  --c-accent-teal:#17A398;
  --c-accent-amber:#E08A3C;
  --c-bg:#F6F8FC;
  --c-surface:#FFFFFF;
  --c-border:#E4EAF3;
  --c-text:#16202E;
  --c-text-sub:#5B6B80;
  --c-text-mute:#8A97A8;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-input:8px;
  --sh-1:0 1px 2px rgba(20,60,116,.06);
  --sh-2:0 12px 28px -18px rgba(20,60,116,.26);
  --sh-3:0 18px 40px -20px rgba(20,60,116,.3);
  --container:1200px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",system-ui,sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.88;
  color:var(--c-text);
  background:var(--c-bg);
  letter-spacing:0;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:#164a8c;}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--c-accent-teal);outline-offset:2px;}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:600;line-height:1.3;color:var(--c-text);letter-spacing:0;}
h1{font-size:40px;line-height:1.28;}
h2{font-size:30px;line-height:1.3;}
h3{font-size:22px;line-height:1.35;}
h4{font-size:18px;line-height:1.4;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0 0 1em;padding-left:1.2em;}
li{margin-bottom:.4em;}
table{border-collapse:collapse;width:100%;}
button,.button{font-family:var(--font-cn);}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:104px 0;position:relative;}
.section--tight{padding:72px 0;}
.section--alt{background:var(--c-surface);}
.text-center{text-align:center;}
.mt-0{margin-top:0;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--c-border);
  transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled{background:rgba(255,255,255,.92);box-shadow:0 6px 18px -14px rgba(20,60,116,.4);}
.nav-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.logo{display:flex;align-items:center;gap:10px;color:var(--c-text);font-weight:700;font-size:19px;}
.logo:hover{color:var(--c-text);}
.logo-mark{width:32px;height:32px;border-radius:9px;background:var(--c-primary);position:relative;flex:0 0 32px;}
.logo-mark::before{content:"";position:absolute;left:8px;top:8px;width:8px;height:8px;border-radius:3px;background:#fff;}
.logo-mark::after{content:"";position:absolute;right:8px;bottom:8px;width:8px;height:8px;border-radius:3px;background:var(--c-accent-teal);}
.logo-text{white-space:nowrap;}
.nav-main{display:flex;align-items:center;gap:4px;}
.nav-item{position:relative;}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;height:72px;padding:0 14px;
  font-size:15px;color:var(--c-text-sub);white-space:nowrap;
  border-bottom:2px solid transparent;transition:color .2s,border-color .2s;
}
.nav-link:hover{color:var(--c-primary);}
.nav-item.is-active>.nav-link{color:var(--c-primary);font-weight:600;border-bottom-color:var(--c-primary);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--c-border);background:#fff;align-items:center;justify-content:center;
  cursor:pointer;padding:0;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-text);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-text);}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* Mega 面板 */
.mega-panel{
  position:absolute;top:calc(100% - 6px);right:0;width:840px;
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-3);padding:26px;overflow:hidden;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
}
.mega-panel::before{content:"";position:absolute;left:0;top:0;right:0;height:3px;background:var(--c-primary);}
.nav-item.has-mega:hover .mega-panel,
.nav-item.has-mega:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1fr 260px;gap:22px;}
.mega-title{font-size:12px;color:var(--c-text-mute);letter-spacing:1px;margin-bottom:10px;}
.mega-link{
  display:block;height:40px;line-height:40px;font-size:14px;color:var(--c-text-sub);
  padding:0 8px;border-radius:var(--r-input);transition:all .18s ease;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.mega-link:hover{color:var(--c-primary);background:var(--c-primary-tint);transform:translateX(2px);}
.mega-card{display:block;border:1px solid var(--c-border);border-radius:var(--r-card);overflow:hidden;background:#fff;box-shadow:var(--sh-1);transition:transform .2s,box-shadow .2s;}
.mega-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.mega-card .thumb{aspect-ratio:16/9;overflow:hidden;}
.mega-card .thumb img{width:100%;height:100%;object-fit:cover;}
.mega-card-body{padding:12px 14px 14px;}
.mega-card h4{font-size:15px;margin-bottom:6px;color:var(--c-text);}
.mega-card p{font-size:13px;color:var(--c-text-sub);line-height:1.6;margin:0 0 8px;}
.mega-card .date{font-size:12px;color:var(--c-text-mute);font-family:var(--font-num);}
.mega-arrow{font-size:11px;transition:transform .2s ease;color:currentColor;}
.nav-item.has-mega:hover .mega-arrow{transform:rotate(180deg);}
.mega-toggle{display:none;}

/* ---------- 锚点条 ---------- */
.anchor-bar{
  position:sticky;top:72px;z-index:110;
  background:rgba(246,248,252,.96);border-bottom:1px solid var(--c-border);
  backdrop-filter:saturate(120%) blur(4px);
}
.anchor-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  display:flex;gap:8px;align-items:center;height:56px;overflow-x:auto;
  scrollbar-width:none;
}
.anchor-inner::-webkit-scrollbar{display:none;}
.anchor-link{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  font-size:14px;color:var(--c-text-sub);white-space:nowrap;transition:all .2s ease;
}
.anchor-link:hover{background:var(--c-primary-tint);color:var(--c-primary);}
.anchor-link.is-current{background:var(--c-primary);color:#fff;font-weight:500;}

/* ---------- 按钮族 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--r-btn);font-size:16px;font-weight:500;
  border:1px solid transparent;cursor:pointer;line-height:1.2;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 10px 22px -16px rgba(31,90,168,.9);}
.btn-primary:hover{background:#1a4d90;color:#fff;transform:translateY(-1px);box-shadow:0 14px 26px -16px rgba(31,90,168,.9);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-border);}
.btn-ghost:hover{background:var(--c-primary-tint);color:var(--c-primary);border-color:rgba(31,90,168,.3);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff;transform:translateY(-1px);}
.btn-sm{padding:10px 18px;font-size:14px;}
.textlink{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--c-primary);
  border-bottom:3px solid transparent;padding-bottom:2px;
}
.textlink:hover{border-bottom-color:rgba(31,90,168,.35);}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    linear-gradient(180deg,rgba(233,241,251,.85) 0%,rgba(246,248,252,0) 62%),
    radial-gradient(circle at 88% 12%,rgba(23,163,152,.10) 0%,rgba(23,163,152,0) 46%);
  padding:76px 0 56px;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(31,90,168,.09) 1px,transparent 1px);
  background-size:22px 22px;opacity:.5;
}
.hero .container{position:relative;z-index:2;}
.hero-grid{align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 14px;
  border-radius:999px;background:var(--c-surface);border:1px solid var(--c-border);
  color:var(--c-primary);font-size:13px;margin-bottom:20px;box-shadow:var(--sh-1);
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--c-accent-teal);display:inline-block;}
.hero h1{margin-bottom:18px;}
.hero-sub{font-size:19px;color:var(--c-text-sub);margin-bottom:14px;}
.hero-desc{font-size:16px;color:var(--c-text-sub);max-width:560px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:40px;}
.hero-visual{position:relative;padding:0 0 24px 24px;}
.hero-media{
  border-radius:var(--r-img);overflow:hidden;border:1px solid var(--c-border);
  box-shadow:var(--sh-2);aspect-ratio:16/11;background:var(--c-surface);
}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-float{
  position:absolute;left:-8px;bottom:-6px;width:250px;background:#fff;
  border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-3);padding:16px;
}
.hero-float h4{font-size:14px;color:var(--c-text-sub);font-weight:500;margin-bottom:10px;}
.hero-float .bar{height:8px;border-radius:999px;background:var(--c-primary-tint);overflow:hidden;margin-bottom:8px;}
.hero-float .bar i{display:block;height:100%;border-radius:999px;background:var(--c-primary);}
.hero-float .bar.t i{background:var(--c-accent-teal);}
.hero-float .val{font-family:var(--font-num);font-size:13px;color:var(--c-text-mute);}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:52px;
  border-top:1px solid var(--c-border);padding-top:28px;
}
.stat{padding:0 22px;border-left:1px solid var(--c-border);}
.stat:first-child{border-left:0;padding-left:0;}
.stat-num{font-family:var(--font-num);font-size:28px;font-weight:700;color:var(--c-primary);line-height:1.2;}
.stat-label{font-size:12px;color:var(--c-text-mute);margin-top:6px;line-height:1.6;}

/* ---------- 通用区块头 ---------- */
.section-head{max-width:660px;margin-bottom:48px;}
.section-head h2{position:relative;padding-left:16px;margin-bottom:14px;}
.section-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  border-radius:2px;background:var(--c-primary);
}
.section-head p{color:var(--c-text-sub);font-size:16px;margin:0;}
.section-head--row{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  max-width:none;margin-bottom:40px;
}
.sec-num{font-family:var(--font-num);font-size:13px;color:var(--c-text-mute);letter-spacing:2px;margin-bottom:10px;}

/* ---------- 卖点区 ---------- */
.value-wrap{align-items:flex-start;}
.value-aside{position:sticky;top:160px;}
.value-aside .section-head{margin-bottom:24px;}
.value-list{list-style:none;padding:0;margin:0 0 28px;}
.value-list li{position:relative;padding-left:22px;font-size:15px;color:var(--c-text-sub);margin-bottom:12px;}
.value-list li::before{
  content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:3px;
  background:var(--c-primary-tint);border:2px solid var(--c-accent-teal);
}
.value-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.v-card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:26px 24px;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.v-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(31,90,168,.3);}
.v-card.offset{margin-top:44px;}
.v-icon{
  width:44px;height:44px;border-radius:12px;background:var(--c-primary-tint);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.v-icon svg{width:22px;height:22px;stroke:var(--c-accent-teal);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.v-card h3{font-size:19px;margin-bottom:10px;}
.v-card p{font-size:15px;color:var(--c-text-sub);line-height:1.78;margin-bottom:16px;}
.heat{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--c-text-mute);}
.heat .bar{flex:1;height:6px;border-radius:999px;background:var(--c-primary-tint);overflow:hidden;}
.heat .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--c-primary),var(--c-accent-teal));border-radius:999px;}
.inline-cta{
  margin-top:36px;padding:22px 26px;border-radius:var(--r-card);
  background:var(--c-surface);border:1px solid var(--c-border);box-shadow:var(--sh-1);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
}
.inline-cta p{margin:0;font-size:15px;color:var(--c-text-sub);}
.inline-cta strong{color:var(--c-text);font-weight:600;}

/* ---------- 演示区 ---------- */
.demo-grid{align-items:flex-start;}
.steps{list-style:none;padding:0;margin:0 0 30px;}
.step{
  display:flex;gap:16px;padding:18px 0;border-bottom:1px dashed var(--c-border);
}
.step:first-child{padding-top:0;}
.step-num{
  flex:0 0 44px;font-family:var(--font-num);font-size:20px;font-weight:700;color:var(--c-primary);
  line-height:1.2;
}
.step h4{font-size:17px;margin-bottom:6px;}
.step p{font-size:14px;color:var(--c-text-sub);margin:0;line-height:1.75;}
.demo-card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-2);overflow:hidden;
}
.win-bar{
  height:38px;display:flex;align-items:center;gap:8px;padding:0 16px;
  background:var(--c-bg);border-bottom:1px solid var(--c-border);
}
.win-bar i{width:9px;height:9px;border-radius:50%;background:#D9E2EF;display:block;}
.win-bar i:nth-child(1){background:#E6B79A;}
.win-bar i:nth-child(2){background:#A8D5CE;}
.win-bar i:nth-child(3){background:#C7D6EA;}
.win-bar span{margin-left:10px;font-size:12px;color:var(--c-text-mute);font-family:var(--font-num);}
.demo-shot{aspect-ratio:16/10;overflow:hidden;}
.demo-shot img{width:100%;height:100%;object-fit:cover;}
.caption{font-size:13px;color:var(--c-text-mute);text-align:center;padding:12px 16px 16px;margin:0;}
.trust-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:56px;
  padding-top:28px;border-top:1px solid var(--c-border);
}
.trust-item{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--c-text-sub);}
.trust-item .dot{width:8px;height:8px;border-radius:50%;background:var(--c-accent-teal);flex:0 0 8px;}

/* ---------- 证据区 ---------- */
.proof-grid{align-items:stretch;}
.metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.metric{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);transition:transform .2s,box-shadow .2s;
}
.metric:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.metric .m-num{font-family:var(--font-num);font-size:30px;font-weight:700;color:var(--c-primary);line-height:1.2;}
.metric .m-num em{font-style:normal;font-size:16px;color:var(--c-accent-teal);margin-left:4px;}
.metric p{font-size:14px;color:var(--c-text-sub);margin:8px 0 0;line-height:1.7;}
.quote-card{
  position:relative;background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:28px 26px 24px;box-shadow:var(--sh-1);margin-bottom:20px;
}
.quote-card::before{
  content:"“";position:absolute;left:20px;top:6px;font-size:52px;line-height:1;
  color:var(--c-primary-tint);font-family:Georgia,serif;
}
.quote-card blockquote{
  margin:0 0 16px;font-size:16px;color:var(--c-text);line-height:1.85;position:relative;z-index:1;
}
.quote-card .who{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--c-text-mute);}
.quote-card .avatar{
  width:34px;height:34px;border-radius:50%;background:var(--c-primary-tint);
  display:flex;align-items:center;justify-content:center;color:var(--c-primary);font-weight:600;font-size:13px;
}
.timeline{
  display:grid;grid-template-columns:repeat(5,1fr);gap:0;margin-top:52px;
  border-top:2px solid var(--c-border);padding-top:26px;position:relative;
}
.tl-item{position:relative;padding-right:16px;}
.tl-item::before{
  content:"";position:absolute;left:0;top:-34px;width:12px;height:12px;border-radius:50%;
  background:#fff;border:3px solid var(--c-accent-teal);
}
.tl-item .tl-num{font-family:var(--font-num);font-size:12px;color:var(--c-text-mute);letter-spacing:1px;}
.tl-item h4{font-size:16px;margin:6px 0 6px;}
.tl-item p{font-size:13px;color:var(--c-text-sub);margin:0;line-height:1.7;}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:22px;}
.news-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-border);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;color:inherit;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(31,90,168,.3);color:inherit;}
.news-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--c-primary-tint);}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.news-card:hover .thumb img{transform:scale(1.04);}
.news-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;
  background:var(--c-primary-tint);color:var(--c-primary);font-size:12px;
  line-height:1;margin-bottom:12px;align-self:flex-start;
}
.news-card h3{
  font-size:18px;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card--lead h3{font-size:22px;}
.news-card p{
  font-size:14px;color:var(--c-text-sub);line-height:1.75;margin:0 0 16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card .meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--c-text-mute);font-family:var(--font-num);
}
.news-card .meta .go{color:var(--c-primary);font-family:var(--font-cn);}
.empty-state{
  border:1px dashed rgba(31,90,168,.4);border-radius:var(--r-card);background:#fff;
  padding:56px 24px;text-align:center;
}
.empty-state svg{width:38px;height:38px;stroke:var(--c-primary);fill:none;stroke-width:1.6;margin:0 auto 14px;}
.empty-state p{color:var(--c-text-sub);font-size:15px;margin-bottom:18px;}

/* ---------- 价格区 ---------- */
.plan-row{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.plan{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:30px 26px;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease;
}
.plan:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.plan h3{font-size:20px;margin-bottom:6px;}
.plan .plan-desc{font-size:14px;color:var(--c-text-sub);margin-bottom:18px;}
.plan .plan-price{
  font-family:var(--font-num);font-size:30px;font-weight:700;color:var(--c-text);
  margin-bottom:18px;line-height:1.2;
}
.plan .plan-price span{font-size:14px;font-weight:400;color:var(--c-text-mute);margin-left:6px;font-family:var(--font-cn);}
.plan ul{list-style:none;padding:0;margin:0 0 26px;}
.plan li{position:relative;padding-left:20px;font-size:15px;color:var(--c-text-sub);margin-bottom:10px;}
.plan li::before{
  content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;
  background:var(--c-accent-teal);
}
.plan .btn{margin-top:auto;width:100%;}
.plan-wrap-featured{max-width:840px;margin:22px auto 0;}
.plan--featured{
  position:relative;border:2px solid var(--c-primary);
  box-shadow:0 22px 44px -30px rgba(31,90,168,.65);
  padding:36px 30px;
}
.plan--featured::before{
  content:"推荐方案";position:absolute;top:-14px;left:26px;height:28px;padding:0 14px;
  border-radius:999px;background:var(--c-accent-amber);color:#fff;font-size:12px;
  display:flex;align-items:center;line-height:1;
}
.plan--featured .plan-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:start;}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px 22px;}
.faq-item{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:rgba(31,90,168,.32);box-shadow:var(--sh-2);}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:20px 52px 20px 20px;font-size:16px;font-weight:500;color:var(--c-text);
  transition:color .2s ease;border-left:3px solid transparent;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:20px;color:var(--c-text-mute);line-height:1;transition:color .2s ease;
}
.faq-item[open] summary{color:var(--c-primary);border-left-color:var(--c-primary);}
.faq-item[open] summary::after{content:"–";color:var(--c-primary);}
.faq-body{padding:0 22px 20px 22px;font-size:15px;color:var(--c-text-sub);line-height:1.85;}

/* ---------- 表单 ---------- */
.form-panel{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:30px 28px;box-shadow:var(--sh-1);
}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1 / -1;}
.field label{font-size:14px;color:var(--c-text-sub);}
.field input,.field textarea,.field select{
  height:48px;border-radius:var(--r-input);border:1px solid var(--c-border);
  padding:0 14px;font-size:15px;font-family:var(--font-cn);color:var(--c-text);
  background:#fff;transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:120px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(31,90,168,.16);
}
.field .hint{font-size:12px;color:var(--c-text-mute);}
.form-actions{grid-column:1 / -1;display:flex;align-items:center;gap:16px;flex-wrap:wrap;}

/* ---------- 尾屏 CTA ---------- */
.cta-band{
  background:var(--c-primary-deep);color:#fff;border-radius:0;
}
.cta-band .container{padding-top:96px;padding-bottom:96px;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;}
.cta-band h2{color:#fff;font-size:30px;margin-bottom:12px;padding:0;}
.cta-band p{color:rgba(255,255,255,.78);font-size:16px;margin:0;max-width:640px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-primary-deep);color:rgba(255,255,255,.76);padding-bottom:72px;}
.foot-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;
  padding:64px 0 40px;border-bottom:1px solid rgba(255,255,255,.14);
}
.site-footer .logo{color:#fff;margin-bottom:16px;}
.site-footer .logo:hover{color:#fff;}
.site-footer .logo-mark{background:#fff;}
.site-footer .logo-mark::before{background:var(--c-primary);}
.site-footer .logo-mark::after{background:var(--c-accent-teal);}
.foot-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);margin:0;max-width:300px;}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600;}
.foot-col ul{list-style:none;padding:0;margin:0;}
.foot-col li{margin-bottom:10px;}
.foot-col a{color:rgba(255,255,255,.7);font-size:14px;transition:color .2s ease,padding-left .2s ease;}
.foot-col a:hover{color:#fff;padding-left:3px;}
.foot-bottom{
  padding-top:26px;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.55);
}
.foot-bottom a{color:rgba(255,255,255,.65);}
.foot-bottom a:hover{color:#fff;}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:130;
  display:inline-flex;align-items:center;gap:10px;height:52px;padding:0 24px;
  border-radius:999px;background:var(--c-accent-amber);color:#fff;font-size:15px;font-weight:500;
  box-shadow:0 16px 30px -16px rgba(224,138,60,.8);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s,background .2s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:#cf7a2e;color:#fff;transform:translateY(-2px);box-shadow:0 20px 34px -16px rgba(224,138,60,.9);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .mega-panel{width:720px;}
  .mega-grid{grid-template-columns:1fr 1fr 1fr 220px;}
}
@media (max-width:1023px){
  h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:19px;}
  body{font-size:16px;}
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .nav-inner{height:64px;}
  .nav-toggle{display:flex;}
  .nav-main{
    position:fixed;left:0;right:0;top:64px;bottom:0;background:#fff;
    flex-direction:column;align-items:stretch;gap:0;padding:12px 20px 120px;
    overflow-y:auto;transform:translateX(100%);transition:transform .28s ease;z-index:115;
    border-top:1px solid var(--c-border);
  }
  .nav-main.is-open{transform:translateX(0);}
  .nav-link{height:52px;padding:0 6px;font-size:16px;border-bottom:1px solid var(--c-border);}
  .nav-item{width:100%;}
  .nav-item.is-active>.nav-link{border-bottom-color:var(--c-border);}
  .nav-item.has-mega .nav-link{justify-content:space-between;}
  .mega-panel{
    position:static;width:auto;opacity:1;visibility:visible;transform:none;
    display:none;box-shadow:none;border:0;border-radius:0;padding:8px 0 16px;
  }
  .mega-panel::before{display:none;}
  .nav-item.has-mega.is-open .mega-panel{display:block;}
  .nav-item.has-mega.is-open .mega-arrow{transform:rotate(180deg);}
  .mega-grid{grid-template-columns:1fr;gap:12px;}
  .mega-card{display:flex;align-items:center;gap:12px;padding:8px;}
  .mega-card .thumb{width:110px;flex:0 0 110px;aspect-ratio:16/10;border-radius:8px;}
  .mega-card-body{padding:0;}
  .anchor-bar{top:64px;}
  .hero{padding:48px 0 40px;}
  .hero-visual{padding:32px 0 0 0;margin-top:28px;}
  .hero-float{position:static;width:100%;margin-top:16px;}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:22px 0;margin-top:36px;}
  .stat{padding:0 16px;}
  .stat:nth-child(odd){border-left:0;padding-left:0;}
  .value-aside{position:static;margin-bottom:32px;}
  .value-cards{grid-template-columns:1fr;gap:18px;}
  .v-card.offset{margin-top:0;}
  .trust-row{grid-template-columns:repeat(2,1fr);gap:14px;}
  .timeline{grid-template-columns:repeat(2,1fr);gap:26px 0;border-top:0;padding-top:0;}
  .tl-item{padding-left:18px;border-left:2px solid var(--c-border);}
  .tl-item::before{left:-7px;top:4px;}
  .news-grid{grid-template-columns:1fr;gap:18px;}
  .plan-row{grid-template-columns:1fr;}
  .plan--featured .plan-grid{grid-template-columns:1fr;}
  .plan-wrap-featured{max-width:none;}
  .faq-grid{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:1fr;}
  .cta-band .container{padding-top:64px;padding-bottom:64px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .foot-grid{grid-template-columns:repeat(2,1fr);gap:28px;padding:48px 0 32px;}
  .float-cta{
    left:0;right:0;bottom:0;height:56px;border-radius:0;padding:0;justify-content:center;
    width:100%;font-size:15px;transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0);}
  .float-cta:hover{transform:translateY(0);}
  .site-footer{padding-bottom:120px;}
}
@media (max-width:639px){
  .container{padding:0 20px;}
  .nav-inner{padding:0 20px;}
  .anchor-inner{padding:0 20px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  .section{padding:48px 0;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-stats{grid-template-columns:1fr;}
  .stat{border-left:0;padding:0 0 16px;border-bottom:1px solid var(--c-border);}
  .stat:last-child{border-bottom:0;padding-bottom:0;}
  .trust-row{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr;}
  .metric-grid{grid-template-columns:1fr;}
  .plan--featured{padding:28px 20px;}
  .form-actions .btn{width:100%;}
  .metric .m-num{font-size:26px;}
}

/* roulang page: article */
:root{
  --c-primary:#1F5AA8;
  --c-primary-deep:#143C74;
  --c-primary-tint:#E9F1FB;
  --c-accent-teal:#17A398;
  --c-accent-amber:#E08A3C;
  --c-bg:#F6F8FC;
  --c-surface:#FFFFFF;
  --c-border:#E4EAF3;
  --c-text:#16202E;
  --c-text-sub:#5B6B80;
  --c-text-mute:#8A97A8;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-input:8px;
  --sh-rest:0 1px 2px rgba(20,60,116,.06);
  --sh-hover:0 12px 28px -18px rgba(20,60,116,.26);
  --sh-float:0 18px 40px -20px rgba(20,60,116,.3);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  --sp-section:104px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.88;
  color:var(--c-text);
  background:var(--c-bg);
  letter-spacing:0;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6{font-family:var(--font-cn);color:var(--c-text);letter-spacing:0;margin:0 0 .6em;font-weight:600;line-height:1.32}
h1{font-size:40px;font-weight:700}
h2{font-size:30px}
h3{font-size:22px}
h4{font-size:18px}
p{margin:0 0 1.15em;color:var(--c-text-sub)}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease}
a:hover{color:var(--c-primary-deep)}
ul,ol{margin:0 0 1.15em;padding-left:1.3em}
li{margin-bottom:.5em;color:var(--c-text-sub)}
img{max-width:100%;display:block}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-accent-teal);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.container-narrow{max-width:900px}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;width:100%;
  background:rgba(255,255,255,.92);
  border-bottom:1px solid var(--c-border);
  backdrop-filter:blur(8px);
  transition:box-shadow .25s ease,background-color .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 20px -16px rgba(20,60,116,.4)}
.nav-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;
  height:72px;display:flex;align-items:center;gap:24px;
}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--c-text)}
.logo-mark{
  width:30px;height:30px;border-radius:9px;display:inline-block;position:relative;
  background:var(--c-primary);
}
.logo-mark::after{
  content:"";position:absolute;right:5px;top:5px;width:9px;height:9px;border-radius:3px;
  background:var(--c-accent-teal);
}
.logo-text{font-size:18px;font-weight:700;letter-spacing:0;color:var(--c-text);white-space:nowrap}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--c-border);
  border-radius:var(--r-input);background:var(--c-surface);position:relative;cursor:pointer;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:11px;width:20px;height:2px;background:var(--c-text);border-radius:2px;content:"";
  transition:transform .22s ease;
}
.nav-toggle span{top:21px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-main{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-item{position:relative;height:72px;display:flex;align-items:center}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;
  padding:0 14px;height:44px;line-height:44px;
  font-size:15px;color:var(--c-text-sub);
  background:transparent;border:0;cursor:pointer;border-radius:9px;
  white-space:nowrap;transition:color .2s ease,background-color .2s ease;
}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-tint)}
.nav-item.is-active .nav-link{color:var(--c-primary);font-weight:600}
.nav-item.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:12px;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.mega-arrow{font-size:11px;color:var(--c-text-mute);transition:transform .2s ease}
.mega-panel{
  position:absolute;top:66px;right:0;width:820px;max-width:calc(100vw - 48px);
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-float);padding:26px 26px 22px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
}
.mega-panel::before{
  content:"";position:absolute;top:0;left:26px;right:26px;height:3px;border-radius:3px;background:var(--c-primary);
}
.nav-item.has-mega:hover .mega-panel,
.nav-item.has-mega:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.nav-item.has-mega:hover .mega-arrow,
.nav-item.has-mega:focus-within .mega-arrow{transform:rotate(180deg);color:var(--c-primary)}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1fr 1.35fr;gap:22px}
.mega-title{font-size:13px;font-weight:700;color:var(--c-text);margin-bottom:10px}
.mega-link{
  display:block;height:40px;line-height:40px;font-size:14px;color:var(--c-text-sub);
  padding:0 8px;border-radius:8px;transition:transform .18s ease,color .18s ease,background-color .18s ease;
}
.mega-link:hover{color:var(--c-primary);background:var(--c-primary-tint);transform:translateX(2px)}
.mega-card{
  display:block;border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:12px;background:var(--c-surface);box-shadow:var(--sh-rest);
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.mega-card:hover{box-shadow:var(--sh-hover);transform:translateY(-2px);border-color:rgba(31,90,168,.3)}
.mega-thumb{aspect-ratio:16/9;border-radius:var(--r-img);overflow:hidden;background:var(--c-primary-tint)}
.mega-thumb img{width:100%;height:100%;object-fit:cover}
.mega-card h5{font-size:15px;margin:10px 0 4px;font-weight:600;color:var(--c-text)}
.mega-card p{font-size:14px;line-height:1.6;margin:0 0 6px;color:var(--c-text-sub)}
.mega-date{font-size:12px;color:var(--c-text-mute);font-family:var(--font-num)}

/* ===== 面包屑 ===== */
.breadcrumb-bar{background:var(--c-surface);border-bottom:1px solid var(--c-border)}
.breadcrumb{
  height:40px;display:flex;align-items:center;gap:8px;
  font-size:14px;color:var(--c-text-sub);
  overflow:hidden;white-space:nowrap;
}
.breadcrumb a{color:var(--c-text-sub)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:var(--c-text-mute)}
.breadcrumb .current{color:var(--c-text-mute);text-overflow:ellipsis;overflow:hidden}

/* ===== 文章布局 ===== */
.article-main{padding:44px 0 96px}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:44px;align-items:start}
.article-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-rest);padding:40px 44px 48px;
}
.article-head{border-bottom:1px solid var(--c-border);padding-bottom:24px;margin-bottom:8px}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:600;color:var(--c-primary);background:var(--c-primary-tint);
  letter-spacing:0;
}
.article-head h1{font-size:38px;line-height:1.32;margin:16px 0 16px;font-weight:700}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;
  font-size:14px;color:var(--c-text-mute);font-family:var(--font-num);
}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--c-accent-teal);display:inline-block}
.share-row{display:flex;gap:10px;margin-left:auto}
.share-btn{
  width:36px;height:36px;border-radius:50%;border:1px solid var(--c-border);background:var(--c-surface);
  display:inline-flex;align-items:center;justify-content:center;color:var(--c-text-sub);cursor:pointer;
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.share-btn:hover{color:var(--c-primary);border-color:rgba(31,90,168,.3);transform:translateY(-1px)}
.share-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.7}

/* ===== 正文排版 ===== */
.article-body{max-width:820px;font-size:17px;line-height:1.9;color:var(--c-text-sub);text-align:left}
.article-body>*:first-child{margin-top:24px}
.article-body p{margin:0 0 1.2em;font-size:17px;line-height:1.9;color:var(--c-text-sub)}
.article-body h2{
  position:relative;font-size:26px;color:var(--c-text);margin:40px 0 16px;padding-left:14px;font-weight:600;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:3px;background:var(--c-primary);
}
.article-body h3{font-size:20px;font-weight:700;color:var(--c-text);margin:32px 0 12px}
.article-body h4{font-size:17px;font-weight:600;color:var(--c-text);margin:24px 0 10px}
.article-body ul,.article-body ol{padding-left:1.35em;margin:0 0 1.2em}
.article-body ul li{list-style:none;position:relative;padding-left:6px}
.article-body ul li::before{
  content:"";position:absolute;left:-14px;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--c-primary);
}
.article-body ol li::marker{color:var(--c-primary);font-weight:600}
.article-body blockquote{
  margin:24px 0;padding:20px 22px;background:var(--c-primary-tint);
  border-left:3px solid var(--c-primary);border-radius:0 var(--r-card) var(--r-card) 0;
  color:var(--c-text);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:24px auto;width:100%;height:auto}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--c-text-mute);text-align:center;margin-top:10px}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;
  border:1px solid var(--c-border);border-radius:var(--r-card);overflow:hidden;
}
.article-body thead th{
  background:var(--c-primary-tint);color:var(--c-text);font-weight:600;text-align:left;
  padding:12px 16px;border-bottom:1px solid var(--c-border);
}
.article-body tbody td{padding:12px 16px;border-bottom:1px solid var(--c-border);color:var(--c-text-sub)}
.article-body tbody tr:nth-child(even){background:#FAFCFF}
.article-body code{
  font-family:var(--font-num);font-size:14px;background:var(--c-primary-tint);
  padding:2px 7px;border-radius:6px;color:var(--c-primary-deep);
}
.article-body pre{
  background:#F2F5FA;border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:18px;overflow:auto;font-size:14px;line-height:1.7;
}
.article-body pre code{background:transparent;padding:0}

/* ===== 侧栏 ===== */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-rest);padding:20px;
}
.side-card h4{font-size:15px;font-weight:700;color:var(--c-text);margin:0 0 12px}
.toc-list{list-style:none;margin:0;padding:0;max-height:320px;overflow:auto}
.toc-list li{margin:0 0 2px}
.toc-list a{
  display:block;font-size:14px;line-height:1.6;padding:7px 8px;border-radius:8px;color:var(--c-text-sub);
  transition:color .18s ease,background-color .18s ease;
}
.toc-list a:hover{color:var(--c-primary);background:var(--c-primary-tint)}
.side-rec{display:flex;gap:12px;margin-bottom:12px;align-items:flex-start}
.side-rec:last-child{margin-bottom:0}
.side-rec .thumb{width:72px;flex:0 0 72px;aspect-ratio:16/10;border-radius:10px;overflow:hidden;background:var(--c-primary-tint)}
.side-rec .thumb img{width:100%;height:100%;object-fit:cover}
.side-rec h5{font-size:14px;font-weight:600;color:var(--c-text);margin:0 0 4px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.side-rec span{font-size:12px;color:var(--c-text-mute);font-family:var(--font-num)}
.side-cta{
  background:var(--c-primary-deep);border-radius:var(--r-card);padding:22px;color:#fff;border:0;
}
.side-cta h4{color:#fff}
.side-cta p{color:rgba(255,255,255,.78);font-size:14px;margin-bottom:14px}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;text-align:center;min-height:44px;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px -12px rgba(20,60,116,.7)}
.btn-primary:hover{background:var(--c-primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-hover)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{background:var(--c-surface);color:var(--c-primary);border-color:var(--c-border)}
.btn-secondary:hover{background:var(--c-primary-tint);color:var(--c-primary-deep);border-color:rgba(31,90,168,.3);transform:translateY(-1px)}
.btn-secondary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;transform:translateY(-1px)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-block{width:100%}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-primary);
  border-bottom:2px solid transparent;padding-bottom:2px;transition:border-color .2s ease,color .2s ease;
}
.link-more:hover{border-bottom-color:var(--c-primary)}

/* ===== 相关推荐 / 资讯卡 ===== */
.section-block{margin-top:44px}
.section-title-row{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:20px}
.section-title-row h2{font-size:24px;margin:0;position:relative;padding-left:14px}
.section-title-row h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;border-radius:3px;background:var(--c-primary);
}
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.news-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-rest);overflow:hidden;display:flex;flex-direction:column;
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.news-card:hover{box-shadow:var(--sh-hover);transform:translateY(-3px);border-color:rgba(31,90,168,.3)}
.news-thumb{aspect-ratio:16/9;background:var(--c-primary-tint);overflow:hidden}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-body h3{
  font-size:17px;line-height:1.55;margin:0;font-weight:600;color:var(--c-text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body p{
  font-size:14px;line-height:1.7;margin:0;color:var(--c-text-sub);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;font-size:12px;color:var(--c-text-mute);font-family:var(--font-num)}
.news-foot a{font-family:var(--font-cn);font-size:14px;font-weight:600}

/* ===== 上一篇 / 下一篇 ===== */
.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:34px}
.prevnext a{
  display:block;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:16px 18px;box-shadow:var(--sh-rest);transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.prevnext a:hover{box-shadow:var(--sh-hover);transform:translateY(-2px);border-color:rgba(31,90,168,.3)}
.prevnext span{display:block;font-size:12px;color:var(--c-text-mute);margin-bottom:6px}
.prevnext strong{font-size:15px;font-weight:600;color:var(--c-text)}

/* ===== 空态 ===== */
.empty-state{
  border:1px dashed rgba(31,90,168,.4);border-radius:var(--r-card);background:var(--c-surface);
  padding:56px 24px;text-align:center;
}
.empty-icon{
  width:46px;height:46px;margin:0 auto 16px;border-radius:12px;border:1.6px solid var(--c-primary);
  display:flex;align-items:center;justify-content:center;
}
.empty-icon svg{width:22px;height:22px;stroke:var(--c-primary);fill:none;stroke-width:1.7}
.empty-state h3{font-size:20px;margin:0 0 8px;color:var(--c-text)}
.empty-state p{margin:0 0 20px;font-size:15px;color:var(--c-text-sub)}

/* ===== 底部 CTA 带 ===== */
.band-cta{background:var(--c-primary-deep);padding:72px 0;margin-top:72px}
.band-cta .cta-row{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.band-cta h2{color:#fff;font-size:28px;margin:0 0 10px}
.band-cta p{color:rgba(255,255,255,.78);margin:0;font-size:15px;max-width:640px}
.band-cta .cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ===== 浮动 CTA ===== */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 22px;border-radius:999px;background:var(--c-accent-amber);color:#fff;
  font-size:15px;font-weight:600;box-shadow:0 14px 30px -16px rgba(224,138,60,.85);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s ease,box-shadow .2s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{color:#fff;transform:translateY(-2px);box-shadow:0 18px 34px -16px rgba(224,138,60,.9)}
.float-cta svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.9}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--c-primary-deep);color:rgba(255,255,255,.8);
  padding:64px 0 88px;
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.site-footer .logo-text{color:#fff}
.site-footer .logo-mark{background:#fff}
.site-footer .logo-mark::after{background:var(--c-accent-teal)}
.foot-brand p{color:rgba(255,255,255,.72);font-size:14px;line-height:1.8;margin:16px 0 0;max-width:320px}
.foot-col h4{color:#fff;font-size:15px;font-weight:600;margin:0 0 14px}
.foot-col ul{list-style:none;margin:0;padding:0}
.foot-col li{margin-bottom:9px}
.foot-col a{color:rgba(255,255,255,.74);font-size:14px}
.foot-col a:hover{color:#fff}
.foot-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.16);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.6);font-family:var(--font-num);
}

/* ===== 响应式 ===== */
@media screen and (max-width:1279px){
  .article-grid{grid-template-columns:minmax(0,1fr)}
  .article-side{position:static;flex-direction:row;flex-wrap:wrap;gap:16px}
  .article-side .side-card{flex:1 1 300px}
}
@media screen and (max-width:1023px){
  :root{--sp-section:72px}
  h1{font-size:32px}
  h2{font-size:24px}
  .mega-panel{width:640px}
  .mega-grid{grid-template-columns:1fr 1fr 1fr}
  .mega-card{grid-column:span 3}
  .foot-grid{grid-template-columns:1fr 1fr}
  .article-head h1{font-size:30px}
}
@media screen and (max-width:767px){
  .nav-toggle{display:block}
  .nav-main{
    position:absolute;left:0;right:0;top:72px;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--c-surface);border-bottom:1px solid var(--c-border);
    box-shadow:var(--sh-float);padding:10px 16px 18px;
    max-height:calc(100vh - 72px);overflow:auto;
    display:none;
  }
  .nav-main.is-open{display:flex}
  .nav-item{height:auto;flex-direction:column;align-items:stretch}
  .nav-item.is-active::after{display:none}
  .nav-link{height:48px;line-height:48px;padding:0 10px;font-size:16px;width:100%;justify-content:flex-start}
  .mega-toggle{justify-content:space-between}
  .mega-panel{
    position:static;width:100%;max-width:100%;opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:0;border-radius:0;padding:0 0 10px;display:none;
  }
  .mega-panel::before{display:none}
  .nav-item.has-mega.is-open .mega-panel{display:block}
  .mega-grid{grid-template-columns:1fr;gap:6px}
  .mega-card{grid-column:auto}
  .news-grid{grid-template-columns:1fr}
  .article-card{padding:26px 20px 32px}
  .article-head h1{font-size:26px}
  .article-body,.article-body p{font-size:16px}
  .article-body h2{font-size:22px;margin-top:32px}
  .prevnext{grid-template-columns:1fr}
  .band-cta{padding:48px 0}
  .band-cta h2{font-size:22px}
  .cta-actions .btn{width:100%}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;justify-content:center;
    width:100%;height:56px;padding:0 16px;
  }
  .site-footer{padding-bottom:96px}
}
@media screen and (max-width:519px){
  .container{padding:0 20px}
  .nav-inner{padding:0 20px}
  h1{font-size:26px}
  .article-head h1{font-size:23px}
  .article-meta{font-size:13px}
  .share-row{margin-left:0;width:100%}
  .logosub{display:none}
  .foot-grid{grid-template-columns:1fr}
}

/* roulang page: category1 */
/* ===================== 设计变量 ===================== */
:root{
  --c-primary:#1F5AA8;
  --c-primary-deep:#143C74;
  --c-primary-tint:#E9F1FB;
  --c-accent-teal:#17A398;
  --c-accent-amber:#E08A3C;
  --c-bg:#F6F8FC;
  --c-surface:#FFFFFF;
  --c-border:#E4EAF3;
  --c-text:#16202E;
  --c-text-sub:#5B6B80;
  --c-text-mute:#8A97A8;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-badge:999px;
  --r-input:8px;
  --sh-1:0 1px 2px rgba(20,60,116,.06);
  --sh-2:0 12px 28px -18px rgba(20,60,116,.26);
  --sh-3:0 18px 40px -20px rgba(20,60,116,.3);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI","PingFang SC",sans-serif;
}

/* ===================== 基础重置 ===================== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.85;
  letter-spacing:0;
  color:var(--c-text);
  background:var(--c-bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease;}
a:hover{color:var(--c-primary-deep);}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-cn);
  color:var(--c-text);
  line-height:1.3;
  margin:0 0 14px;
  font-weight:600;
  letter-spacing:0;
}
h1{font-size:40px;line-height:1.25;font-weight:700;}
h2{font-size:30px;line-height:1.28;}
h3{font-size:22px;line-height:1.35;}
h4{font-size:18px;line-height:1.4;}
p{margin:0 0 1.1em;}
ul,ol{margin:0 0 1.1em;padding-left:1.15em;}
li{margin-bottom:.5em;}
ul li::marker{color:var(--c-primary);}
ol li::marker{color:var(--c-primary);font-weight:600;}
button,.button{font-family:inherit;}
input,select,textarea{font-family:inherit;}
:focus{outline:none;}
:focus-visible{outline:2px solid var(--c-accent-teal);outline-offset:2px;border-radius:4px;}

/* Foundation 默认覆盖 */
a:not(.btn):not(.nav-link):not(.mega-link):not(.logo):not(.float-cta){text-decoration:none;}
a:not(.btn):not(.nav-link):not(.mega-link):not(.logo):not(.float-cta):hover{text-decoration:underline;text-underline-offset:3px;}
button,.button{
  border-radius:var(--r-btn) !important;
  background-color:var(--c-primary);
  color:#fff;
  padding:14px 26px;
  border:1px solid transparent;
  font-size:16px;
  font-weight:500;
  transition:transform .18s ease,background-color .18s ease,box-shadow .18s ease;
}
button:hover,.button:hover{background-color:var(--c-primary-deep);color:#fff;}
table{border-collapse:collapse;width:100%;}
.menu{background:transparent;}
.menu a{color:var(--c-primary);}

/* ===================== 容器与板块 ===================== */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.section{padding:104px 0;}
.section-sm{padding:72px 0;}
.section-tint{background:var(--c-primary-tint);}
.section-surface{background:var(--c-surface);}
.section-head{max-width:760px;margin-bottom:52px;}
.section-head h2{position:relative;padding-left:16px;}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.18em;width:3px;height:.92em;
  background:var(--c-primary);border-radius:2px;
}
.section-head p{color:var(--c-text-sub);font-size:16.5px;margin-bottom:0;}

/* ===================== 按钮族 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 26px;
  border-radius:var(--r-btn);
  font-size:16px;font-weight:500;
  line-height:1.2;
  min-height:48px;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
  border:1px solid transparent;
  white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--c-primary-deep);color:#fff;box-shadow:var(--sh-2);}
.btn-outline{background:#fff;color:var(--c-primary);border-color:var(--c-border);}
.btn-outline:hover{background:var(--c-primary-tint);color:var(--c-primary);border-color:rgba(31,90,168,.3);}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
.btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:500;color:var(--c-primary);
  border-bottom:3px solid rgba(31,90,168,.18);
  padding-bottom:2px;
}
.link-more:hover{color:var(--c-primary-deep);border-bottom-color:var(--c-primary);text-decoration:none;}

/* ===================== 徽章与标签 ===================== */
.badge{
  display:inline-flex;align-items:center;
  height:24px;padding:0 12px;
  border-radius:var(--r-badge);
  background:var(--c-primary-tint);
  color:var(--c-primary);
  font-size:12px;font-weight:500;letter-spacing:0;
  white-space:nowrap;
}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.tag{
  display:inline-flex;align-items:center;
  padding:8px 14px;border-radius:var(--r-badge);
  background:#fff;border:1px solid var(--c-border);
  color:var(--c-text-sub);font-size:13.5px;
  transition:border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.tag:hover{border-color:rgba(31,90,168,.3);color:var(--c-primary);box-shadow:var(--sh-1);}

/* ===================== 顶部导航 ===================== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--c-border);
  transition:box-shadow .22s ease,background-color .22s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.92);
  box-shadow:0 6px 20px -14px rgba(20,60,116,.35);
}
.nav-inner{
  max-width:1200px;margin:0 auto;
  padding:0 24px;
  height:72px;
  display:flex;align-items:center;gap:28px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo:hover{text-decoration:none;}
.logo-mark{
  width:30px;height:30px;border-radius:9px;
  background:var(--c-primary);
  position:relative;flex:0 0 auto;
}
.logo-mark::after{
  content:"";position:absolute;inset:9px;
  border:3px solid #fff;border-radius:5px;
}
.logo-text{font-size:19px;font-weight:700;color:var(--c-text);letter-spacing:0;}
.nav-main{display:flex;align-items:center;gap:4px;flex:1 1 auto;}
.nav-item{position:relative;}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;
  height:72px;padding:0 14px;
  font-size:15.5px;color:var(--c-text-sub);
  border-bottom:2px solid transparent;
  background:transparent;border-top:0;border-left:0;border-right:0;
  border-radius:0;
  cursor:pointer;
  transition:color .18s ease,border-color .18s ease;
}
.nav-link:hover{color:var(--c-primary);border-bottom-color:rgba(31,90,168,.35);text-decoration:none;}
.nav-item.is-active .nav-link{color:var(--c-primary);font-weight:600;border-bottom-color:var(--c-primary);}
.mega-toggle{font-size:15.5px;}
.mega-arrow{font-size:11px;transition:transform .2s ease;}
.has-mega:hover .mega-arrow,
.has-mega:focus-within .mega-arrow,
.has-mega.is-open .mega-arrow{transform:rotate(180deg);}

.nav-toggle{
  display:none;
  width:46px;height:46px;
  padding:0;border:1px solid var(--c-border);
  background:#fff;border-radius:var(--r-btn);
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;transform:translateX(-50%);
  width:20px;height:2px;background:var(--c-text);border-radius:2px;
  content:"";display:block;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-7px;}
.nav-toggle span::after{top:7px;}

/* Mega 面板 */
.mega-panel{
  position:absolute;top:calc(100% - 2px);right:0;
  width:860px;max-width:calc(100vw - 48px);
  background:#fff;
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-3);
  padding:26px 26px 22px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s;
  z-index:70;
}
.mega-panel::before{
  content:"";position:absolute;left:24px;right:24px;top:0;height:3px;
  background:var(--c-primary);border-radius:3px;
}
.has-mega:hover .mega-panel,
.has-mega:focus-within .mega-panel,
.has-mega.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1fr 1.15fr;gap:24px;}
.mega-title{
  font-size:12.5px;color:var(--c-text-mute);
  font-weight:600;margin-bottom:10px;letter-spacing:0;
}
.mega-link{
  display:block;line-height:40px;height:40px;
  font-size:14.5px;color:var(--c-text-sub);
  border-radius:8px;padding:0 8px;margin-left:-8px;
  transition:color .16s ease,transform .16s ease,background-color .16s ease;
  overflow:hidden;white-space:nowrap;text-overflow:ellipsis;
}
.mega-link:hover{color:var(--c-primary);transform:translateX(2px);background:var(--c-primary-tint);text-decoration:none;}
.mega-entry{
  border:1px solid var(--c-border);border-radius:var(--r-card);
  overflow:hidden;background:#fff;box-shadow:var(--sh-1);
  transition:box-shadow .2s ease,transform .2s ease;
}
.mega-entry:hover{box-shadow:var(--sh-2);transform:translateY(-2px);text-decoration:none;}
.mega-entry .media{margin-bottom:0;border-radius:0;}
.mega-entry-body{padding:14px 16px 16px;}
.mega-entry-body h5{
  font-size:15px;font-weight:600;margin:0 0 6px;color:var(--c-text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.mega-entry-body p{
  font-size:13px;line-height:1.6;color:var(--c-text-sub);margin:0 0 8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.mega-date{font-size:12px;color:var(--c-text-mute);font-family:var(--font-num);}

/* ===================== 面包屑 ===================== */
.breadcrumb-bar{background:var(--c-surface);border-bottom:1px solid var(--c-border);}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;
  min-height:40px;padding:10px 0;
  font-size:14px;color:var(--c-text-mute);
  gap:8px;
}
.breadcrumb a{color:var(--c-text-sub);}
.breadcrumb a:hover{color:var(--c-primary);text-decoration:none;}
.breadcrumb .sep{color:var(--c-text-mute);}
.breadcrumb .current{color:var(--c-text-mute);}

/* ===================== 媒体容器 ===================== */
.media{
  position:relative;overflow:hidden;border-radius:var(--r-img);
  background:var(--c-primary-tint);margin:0;
}
.media img{width:100%;height:100%;object-fit:cover;display:block;}
.media-16-9{aspect-ratio:16 / 9;}
.media-16-10{aspect-ratio:16 / 10;}
.media-caption{
  font-size:13px;color:var(--c-text-mute);
  text-align:center;margin:10px 0 0;
}

/* ===================== 页面横幅 ===================== */
.page-banner{
  background:var(--c-primary-tint);
  padding:72px 0 64px;
  border-bottom:1px solid rgba(31,90,168,.1);
}
.banner-copy h1{margin-top:18px;margin-bottom:14px;max-width:12em;}
.banner-sub{
  font-size:17px;font-weight:500;color:var(--c-primary);
  margin-bottom:16px;
}
.banner-desc{font-size:16.5px;color:var(--c-text-sub);max-width:36em;margin-bottom:0;}
.banner-media{position:relative;margin-top:36px;}
.banner-media .media{box-shadow:var(--sh-2);}
.banner-float{
  position:absolute;left:-14px;bottom:22px;
  background:#fff;border:1px solid var(--c-border);
  border-radius:var(--r-card);box-shadow:var(--sh-2);
  padding:14px 18px;min-width:180px;
}
.banner-float-num{
  font-family:var(--font-num);font-size:26px;font-weight:700;
  color:var(--c-primary);line-height:1.1;
}
.banner-float-txt{font-size:12px;color:var(--c-text-mute);margin-top:4px;}
.progress-block{margin-top:34px;max-width:460px;}
.progress-head{display:flex;justify-content:space-between;font-size:13.5px;color:var(--c-text-sub);margin-bottom:8px;}
.progress-head span:last-child{color:var(--c-accent-amber);font-weight:600;font-family:var(--font-num);}
.progress-track{height:8px;border-radius:999px;background:#fff;border:1px solid rgba(31,90,168,.15);overflow:hidden;}
.progress-fill{display:block;height:100%;width:68%;border-radius:999px;background:var(--c-primary);}
.progress-foot{display:flex;justify-content:space-between;font-size:12.5px;color:var(--c-text-mute);margin-top:8px;gap:10px;}

/* ===================== 数据条 ===================== */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;margin-top:56px;
  border-top:1px solid rgba(31,90,168,.14);
  padding-top:28px;
}
.stat-item{padding:0 22px;border-left:1px solid rgba(31,90,168,.14);}
.stat-item:first-child{border-left:0;padding-left:0;}
.stat-num{
  font-family:var(--font-num);font-size:28px;font-weight:700;
  color:var(--c-primary);line-height:1.15;
}
.stat-num em{font-style:normal;font-size:16px;font-weight:600;margin-left:2px;}
.stat-txt{font-size:12.5px;color:var(--c-text-sub);margin-top:6px;}

/* ===================== 三段图文 ===================== */
.flow-row{padding:38px 0;border-top:1px solid var(--c-border);}
.flow-row:first-of-type{border-top:0;padding-top:0;}
.flow-row .media{box-shadow:var(--sh-1);}
.flow-copy{padding-top:8px;}
.step-no{
  display:inline-block;font-family:var(--font-num);
  font-size:13px;font-weight:700;color:var(--c-primary);
  background:var(--c-primary-tint);border-radius:var(--r-badge);
  padding:4px 12px;margin-bottom:14px;
}
.flow-copy h3{margin-bottom:12px;}
.flow-copy p{color:var(--c-text-sub);font-size:16px;}
.tick-list{list-style:none;padding:0;margin:18px 0 0;}
.tick-list li{
  position:relative;padding-left:22px;font-size:15px;color:var(--c-text);
  line-height:1.7;margin-bottom:10px;
}
.tick-list li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:10px;height:10px;border-radius:50%;
  border:2px solid var(--c-accent-teal);background:#fff;
}
.flow-row.is-reverse .flow-media{order:2;}
.flow-row.is-reverse .flow-copy{order:1;}

/* ===================== 卡片族 ===================== */
.card{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
  overflow:hidden;
  height:100%;
}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:rgba(31,90,168,.3);}
.card-body{padding:22px 22px 24px;}
.card h4{font-size:17px;margin-bottom:8px;}
.card p{font-size:14.5px;color:var(--c-text-sub);margin-bottom:0;line-height:1.75;}

.deliver-card{position:relative;padding-top:26px;}
.deliver-num{
  font-family:var(--font-num);font-size:13px;font-weight:700;
  color:var(--c-accent-teal);
}

/* 资讯卡 */
.news-card{display:flex;gap:22px;align-items:stretch;border-radius:var(--r-card);}
.news-card .media{flex:0 0 300px;max-width:300px;border-radius:var(--r-img);}
.news-card .news-body{padding:6px 0;display:flex;flex-direction:column;justify-content:center;}
.news-title{
  font-size:19px;font-weight:600;color:var(--c-text);margin:10px 0 10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-title:hover{color:var(--c-primary);text-decoration:none;}
.news-sum{
  font-size:14.5px;color:var(--c-text-sub);margin-bottom:12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  line-height:1.75;
}
.news-meta{font-size:12.5px;color:var(--c-text-mute);font-family:var(--font-num);}

/* ===================== FAQ ===================== */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.faq-item{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:box-shadow .2s ease,border-color .2s ease;
  height:fit-content;
}
.faq-item:hover{box-shadow:var(--sh-2);border-color:rgba(31,90,168,.3);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:flex-start;gap:12px;
  padding:20px 22px;
  font-size:16.5px;font-weight:600;color:var(--c-text);
  line-height:1.6;
  min-height:48px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"";flex:0 0 auto;width:3px;height:0;
  background:var(--c-primary);border-radius:3px;
  margin-top:.28em;transition:height .2s ease;
}
.faq-item[open] summary{color:var(--c-primary);}
.faq-item[open] summary::before{height:1.05em;}
.faq-item summary::after{
  content:"+";margin-left:auto;flex:0 0 auto;
  font-family:var(--font-num);font-size:20px;font-weight:400;
  color:var(--c-text-mute);line-height:1;transition:transform .2s ease,color .2s ease;
}
.faq-item[open] summary::after{content:"−";color:var(--c-primary);}
.faq-body{padding:0 22px 22px 37px;font-size:15.5px;color:var(--c-text-sub);line-height:1.8;}
.faq-body p{margin-bottom:.7em;}
.faq-body p:last-child{margin-bottom:0;}

/* ===================== 深色 CTA ===================== */
.cta-band{
  background:var(--c-primary-deep);
  color:#fff;
  padding:96px 0;
}
.cta-band h2{color:#fff;margin-bottom:12px;}
.cta-band p{color:rgba(255,255,255,.78);font-size:16.5px;margin-bottom:0;max-width:34em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}
.cta-actions .btn{align-items:center;}

/* ===================== 浮动 CTA ===================== */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:80;
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 24px;border-radius:var(--r-badge);
  background:var(--c-accent-amber);color:#fff;
  font-size:15px;font-weight:600;line-height:1.2;
  box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s,background-color .2s ease,box-shadow .2s ease;
}
.float-cta.is-in{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:#cf7828;color:#fff;transform:translateY(-2px);box-shadow:var(--sh-3);text-decoration:none;}

/* ===================== 页脚 ===================== */
.site-footer{
  background:var(--c-primary-deep);
  color:rgba(255,255,255,.72);
  padding:76px 0 72px;
}
.foot-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px;
  padding-bottom:40px;
}
.foot-brand .logo-text{color:#fff;}
.foot-brand .logo-mark{background:rgba(255,255,255,.16);}
.foot-brand .logo-mark::after{border-color:#fff;}
.foot-brand p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.66);margin:16px 0 0;max-width:30em;}
.foot-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.foot-col ul{list-style:none;padding:0;margin:0;}
.foot-col li{margin-bottom:10px;}
.foot-col a{font-size:14.5px;color:rgba(255,255,255,.7);}
.foot-col a:hover{color:#fff;text-decoration:none;}
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.14);
  padding-top:24px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.6);
}

/* ===================== 响应式 ===================== */
@media screen and (max-width:1279px){
  h1{font-size:36px;}
  .container{padding:0 22px;}
}

@media screen and (max-width:1023px){
  .section{padding:72px 0;}
  .section-sm{padding:56px 0;}
  h1{font-size:32px;}
  h2{font-size:26px;}
  h3{font-size:20px;}
  .nav-toggle{display:inline-block;margin-left:auto;}
  .nav-main{
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--c-border);
    box-shadow:var(--sh-2);
    max-height:0;overflow:hidden;
    transition:max-height .28s ease;
  }
  .nav-main.is-open{max-height:640px;overflow-y:auto;}
  .nav-item{border-top:1px solid var(--c-border);}
  .nav-item:first-child{border-top:0;}
  .nav-link{
    width:100%;height:auto;min-height:52px;
    padding:14px 24px;justify-content:space-between;
    border-bottom:0;border-left:3px solid transparent;
    font-size:16px;
  }
  .nav-item.is-active .nav-link{border-left-color:var(--c-primary);border-bottom:0;}
  .mega-panel{
    position:static;width:100%;max-width:100%;
    opacity:1;visibility:visible;transform:none;
    border:0;border-radius:0;box-shadow:none;
    padding:0 24px;max-height:0;overflow:hidden;
    transition:max-height .3s ease;
  }
  .mega-panel::before{display:none;}
  .has-mega.is-open .mega-panel{max-height:900px;padding:6px 24px 20px;}
  .mega-grid{grid-template-columns:1fr;gap:18px;}
  .mega-entry{max-width:360px;}
  .banner-media{margin-top:32px;}
  .flow-row.is-reverse .flow-media{order:0;}
  .flow-row.is-reverse .flow-copy{order:0;}
  .flow-copy{margin-top:24px;}
  .flow-media{margin-top:0;}
  .cta-actions{justify-content:flex-start;margin-top:26px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .news-card .media{flex:0 0 240px;max-width:240px;}
}

@media screen and (max-width:767px){
  .section{padding:48px 0;}
  .section-sm{padding:40px 0;}
  body{font-size:16px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  h3{font-size:18px;}
  h4{font-size:16px;}
  .container{padding:0 20px;}
  .nav-inner{padding:0 20px;height:64px;gap:16px;}
  .nav-link{height:auto;}
  .page-banner{padding:48px 0 44px;}
  .banner-copy h1{max-width:none;}
  .banner-float{left:auto;right:12px;bottom:12px;padding:12px 14px;min-width:150px;}
  .banner-float-num{font-size:22px;}
  .stat-strip{grid-template-columns:1fr 1fr;row-gap:24px;margin-top:40px;}
  .stat-item{border-left:0;padding:0;}
  .stat-item:nth-child(even){border-left:1px solid rgba(31,90,168,.14);padding-left:20px;}
  .stat-num{font-size:24px;}
  .faq-grid{grid-template-columns:1fr;gap:14px;}
  .news-card{flex-direction:column;}
  .news-card .media{flex:0 0 auto;max-width:100%;width:100%;}
  .cta-band{padding:64px 0;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .float-cta{
    left:0;right:0;bottom:0;
    width:100%;height:56px;border-radius:0;
    padding:0;font-size:15px;
    transform:translateY(0);
  }
  .float-cta.is-in{transform:translateY(0);}
  .float-cta:hover{transform:translateY(0);}
  .site-footer{padding-bottom:72px;}
}

@media screen and (max-width:519px){
  h1{font-size:26px;}
  .btn{width:100%;}
  .btn-row{gap:12px;}
  .progress-foot{font-size:11.5px;}
  .stat-item:nth-child(even){padding-left:16px;}
}

/* roulang page: category2 */
:root{
  --c-primary:#1F5AA8;
  --c-primary-deep:#143C74;
  --c-primary-tint:#E9F1FB;
  --c-accent-teal:#17A398;
  --c-accent-amber:#E08A3C;
  --c-bg:#F6F8FC;
  --c-surface:#FFFFFF;
  --c-border:#E4EAF3;
  --c-text:#16202E;
  --c-text-sub:#5B6B80;
  --c-text-mute:#8A97A8;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-input:8px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,60,116,.06);
  --sh-2:0 12px 28px -18px rgba(20,60,116,.26);
  --sh-3:0 18px 40px -20px rgba(20,60,116,.3);
  --maxw:1200px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-num:Inter,system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px;}
body{
  margin:0;
  padding:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.88;
  color:var(--c-text);
  background:var(--c-bg);
  letter-spacing:0;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--c-primary-deep);}
h1,h2,h3,h4,h5,h6{font-family:var(--font-cn);color:var(--c-text);letter-spacing:0;margin:0 0 16px;}
h1{font-size:40px;line-height:1.28;font-weight:700;}
h2{font-size:30px;line-height:1.32;font-weight:700;}
h3{font-size:22px;line-height:1.4;font-weight:600;}
h4{font-size:18px;line-height:1.45;font-weight:600;}
p{margin:0 0 1.1em;color:var(--c-text-sub);}
ul,ol{margin:0 0 1.1em;padding-left:0;list-style:none;}
li{color:var(--c-text-sub);}
button{font-family:inherit;}
button,input,select,textarea{font-size:16px;font-family:inherit;}
:focus-visible{outline:2px solid var(--c-accent-teal);outline-offset:2px;border-radius:4px;}

/* ---------- foundation overrides ---------- */
.button,.button:visited{
  border-radius:var(--r-btn);
  background:var(--c-primary);
  color:#fff;
  padding:14px 26px;
  font-size:16px;
  font-weight:600;
  border:1px solid transparent;
  transition:all .18s ease;
  margin:0;
}
.button:hover{background:#1a4e93;color:#fff;}
.menu{background:transparent;margin:0;}
.menu a{color:var(--c-text-sub);}
table{border-collapse:separate;border-spacing:0;margin:0;}
ul.menu li{list-style:none;}
.grid-x{max-width:100%;}

/* ---------- layout ---------- */
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;width:100%;}
.section{padding:96px 0;}
.section--tight{padding:64px 0;}
.section--alt{background:var(--c-surface);border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);}
.grid-dots{
  background-image:radial-gradient(rgba(31,90,168,.10) 1px,transparent 1px);
  background-size:22px 22px;
}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(255,255,255,.94);
  border-bottom:1px solid transparent;
  transition:box-shadow .22s ease,border-color .22s ease,background .22s ease;
}
.site-header.is-scrolled{
  border-bottom-color:var(--c-border);
  box-shadow:var(--sh-1);
}
.nav-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 20px;
  min-height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--c-text);}
.logo:hover{color:var(--c-text);}
.logo-mark{
  width:26px;height:26px;border-radius:8px;
  background:var(--c-primary);
  position:relative;
  flex:0 0 auto;
}
.logo-mark::after{
  content:"";position:absolute;inset:8px;border-radius:3px;background:var(--c-accent-teal);
}
.logo-text{font-size:18px;font-weight:700;line-height:1;white-space:nowrap;}
.nav-main{display:flex;align-items:center;gap:2px;}
.nav-item{position:relative;}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:44px;
  padding:0 14px;
  border:0;
  background:transparent;
  border-radius:8px;
  font-size:15px;
  font-weight:500;
  color:var(--c-text-sub);
  white-space:nowrap;
  cursor:pointer;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-tint);}
.nav-item.is-active .nav-link{color:var(--c-primary);font-weight:600;}
.nav-item.is-active .nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.mega-arrow{margin-left:6px;font-size:12px;line-height:1;transition:transform .2s ease;}
.has-mega.is-open .mega-arrow{transform:rotate(180deg);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--c-border);
  border-radius:10px;
  background:#fff;
  align-items:center;
  justify-content:center;
  cursor:pointer;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  display:block;width:18px;height:2px;background:var(--c-text);border-radius:2px;content:"";position:relative;
}
.nav-toggle span::before{position:absolute;top:-6px;left:0;}
.nav-toggle span::after{position:absolute;top:6px;left:0;}

/* mega panel */
.mega-panel{
  position:absolute;
  top:calc(100% + 10px);
  right:0;
  width:860px;
  background:#fff;
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-3);
  padding:26px 26px 22px;
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  pointer-events:none;
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
  z-index:80;
}
.mega-panel::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--c-primary);border-radius:var(--r-card) var(--r-card) 0 0;
}
.has-mega:hover .mega-panel,
.has-mega:focus-within .mega-panel,
.has-mega.is-open .mega-panel{
  opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto;
}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1fr 1.35fr;gap:22px;}
.mega-title{font-size:12px;font-weight:600;color:var(--c-text-mute);margin-bottom:8px;}
.mega-link{
  display:block;
  height:40px;
  line-height:40px;
  padding:0 8px;
  border-radius:8px;
  font-size:14px;
  color:var(--c-text-sub);
  transition:all .18s ease;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.mega-link:hover{color:var(--c-primary);background:var(--c-primary-tint);transform:translateX(2px);}
.mega-card{
  display:block;
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  padding:10px;
  background:#fff;
  box-shadow:var(--sh-1);
  transition:all .2s ease;
}
.mega-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:rgba(31,90,168,.3);}
.mega-card__media{display:block;aspect-ratio:16/9;border-radius:10px;overflow:hidden;background:var(--c-primary-tint);margin-bottom:10px;}
.mega-card__media img{width:100%;height:100%;object-fit:cover;}
.mega-card__title{display:block;font-size:14px;font-weight:600;color:var(--c-text);line-height:1.5;margin-bottom:4px;}
.mega-card__desc{display:block;font-size:13px;color:var(--c-text-sub);line-height:1.6;margin-bottom:6px;}
.mega-card__date{display:block;font-size:12px;color:var(--c-text-mute);font-family:var(--font-num);}

/* ---------- breadcrumb ---------- */
.crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  min-height:40px;font-size:14px;color:var(--c-text-mute);
}
.crumb a{color:var(--c-text-sub);}
.crumb a:hover{color:var(--c-primary);}
.crumb .sep{color:var(--c-text-mute);}
.crumb .current{color:var(--c-text-mute);}

/* ---------- cat hero ---------- */
.cat-hero{
  background:var(--c-surface);
  border-bottom:1px solid var(--c-border);
  padding:56px 0 64px;
  position:relative;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(31,90,168,.08) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
}
.cat-hero__inner{position:relative;z-index:1;}
.cat-hero h1{margin-bottom:18px;}
.cat-hero__lede{
  font-size:18px;
  color:var(--c-text-sub);
  max-width:520px;
  margin-bottom:24px;
  line-height:1.8;
}
.cat-hero__actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.cat-hero__note{font-size:14px;color:var(--c-text-mute);margin-top:16px;}
.cat-hero__media{
  aspect-ratio:16/10;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--c-border);
  box-shadow:var(--sh-2);
  background:var(--c-primary-tint);
}
.cat-hero__media img{width:100%;height:100%;object-fit:cover;}

/* ---------- badges & buttons ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;
  border-radius:var(--r-pill);
  background:var(--c-primary-tint);
  color:var(--c-primary);
  font-size:12px;font-weight:600;line-height:1;
  white-space:nowrap;
}
.badge--amber{background:rgba(224,138,60,.14);color:#B96A22;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:14px 26px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:all .18s ease;
}
.btn--primary{background:var(--c-primary);color:#fff;}
.btn--primary:hover{background:#1a4e93;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn--primary:active{transform:translateY(1px);}
.btn--outline{background:#fff;color:var(--c-primary);border-color:var(--c-border);}
.btn--outline:hover{background:var(--c-primary-tint);border-color:rgba(31,90,168,.3);color:var(--c-primary);transform:translateY(-1px);}
.btn--outline:active{transform:translateY(1px);}
.btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn--ghost:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-1px);}
.btn--block{width:100%;}
.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--c-primary);
  border-bottom:2px solid rgba(31,90,168,.22);
  padding-bottom:3px;
  transition:all .18s ease;
}
.link-more:hover{color:var(--c-primary-deep);border-bottom-color:var(--c-primary);}

/* ---------- metric strip ---------- */
.metric-strip{
  border-top:1px solid var(--c-border);
  border-bottom:1px solid var(--c-border);
  background:var(--c-surface);
  padding:28px 0;
}
.metric-row{display:flex;flex-wrap:wrap;gap:0;}
.metric-item{
  flex:1 1 0;
  min-width:200px;
  padding:8px 24px;
  border-left:1px solid var(--c-border);
}
.metric-item:first-child{border-left:0;padding-left:0;}
.metric-num{
  font-family:var(--font-num);
  font-size:28px;font-weight:700;line-height:1.2;color:var(--c-text);
  display:block;
  margin-bottom:4px;
}
.metric-num em{font-style:normal;color:var(--c-primary);}
.metric-label{font-size:12px;color:var(--c-text-mute);line-height:1.6;display:block;}

/* ---------- two column layout ---------- */
.cat-layout{padding:72px 0 24px;}
.cat-toc{
  position:sticky;
  top:96px;
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  background:var(--c-surface);
  box-shadow:var(--sh-1);
  padding:22px 20px;
}
.cat-toc__title{font-size:12px;font-weight:600;color:var(--c-text-mute);margin-bottom:10px;}
.cat-toc ul{margin:0;}
.cat-toc li{margin-bottom:2px;}
.cat-toc a{
  display:block;
  padding:10px 12px;
  border-radius:8px;
  font-size:14px;
  color:var(--c-text-sub);
  border-left:3px solid transparent;
  transition:all .18s ease;
  line-height:1.5;
}
.cat-toc a:hover{background:var(--c-primary-tint);color:var(--c-primary);border-left-color:rgba(31,90,168,.45);}
.cat-toc a.is-current{background:var(--c-primary-tint);color:var(--c-primary);font-weight:600;border-left-color:var(--c-primary);}
.cat-toc__cta{margin-top:16px;padding-top:16px;border-top:1px solid var(--c-border);}

.cat-block{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  padding:32px;
  margin-bottom:24px;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.cat-block:hover{box-shadow:var(--sh-2);border-color:rgba(31,90,168,.22);}
.cat-block h2{
  font-size:26px;
  position:relative;
  padding-left:16px;
  margin-bottom:18px;
}
.cat-block h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  background:var(--c-primary);border-radius:2px;
}
.cat-block h3{font-size:18px;margin:24px 0 12px;}
.cat-seq{
  font-family:var(--font-num);
  font-size:13px;font-weight:700;color:var(--c-accent-teal);
  display:inline-block;margin-bottom:6px;
}
.plain-list{padding:0;margin:0 0 18px;}
.plain-list li{
  position:relative;
  padding-left:22px;
  margin-bottom:10px;
  line-height:1.8;
  font-size:16px;
}
.plain-list li::before{
  content:"";position:absolute;left:0;top:12px;
  width:6px;height:6px;border-radius:2px;background:var(--c-accent-teal);
}
.plain-list li strong{color:var(--c-text);font-weight:600;}
.note-box{
  border:1px dashed rgba(31,90,168,.35);
  background:rgba(233,241,251,.55);
  border-radius:var(--r-card);
  padding:18px 20px;
  font-size:15px;
  color:var(--c-text-sub);
  line-height:1.8;
  margin-bottom:8px;
}
.quote-card{
  position:relative;
  background:var(--c-primary-tint);
  border-left:3px solid var(--c-primary);
  border-radius:0 var(--r-card) var(--r-card) 0;
  padding:22px 24px 20px 26px;
  margin:20px 0;
}
.quote-card::before{
  content:"“";
  position:absolute;top:6px;left:10px;
  font-size:40px;line-height:1;color:rgba(31,90,168,.28);
  font-family:var(--font-num);
}
.quote-card p{color:var(--c-text);font-size:16px;margin:0 0 8px;}
.quote-card span{font-size:13px;color:var(--c-text-mute);}
.figure{margin:24px 0;}
.figure__media{
  aspect-ratio:16/10;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--c-border);background:var(--c-primary-tint);
}
.figure__media img{width:100%;height:100%;object-fit:cover;}
.figure figcaption{font-size:13px;color:var(--c-text-mute);text-align:center;margin-top:10px;}

/* feature cards */
.feature-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:8px;}
.feature-card{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:var(--sh-1);
  transition:all .2s ease;
}
.feature-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:rgba(31,90,168,.3);}
.feature-card__icon{
  width:32px;height:32px;color:var(--c-accent-teal);margin-bottom:14px;
}
.feature-card__icon svg{width:32px;height:32px;display:block;}
.feature-card h4{font-size:17px;margin-bottom:8px;}
.feature-card p{font-size:14.5px;line-height:1.75;margin:0 0 12px;}
.feature-card .link-more{font-size:14px;}

/* steps */
.step-list{counter-reset:step;margin:0;padding:0;}
.step-list li{
  position:relative;
  padding-left:56px;
  margin-bottom:18px;
  min-height:44px;
}
.step-list li::before{
  counter-increment:step;
  content:"0" counter(step);
  position:absolute;left:0;top:0;
  width:38px;height:38px;border-radius:10px;
  background:var(--c-primary-tint);color:var(--c-primary);
  font-family:var(--font-num);font-size:14px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.step-list li strong{display:block;color:var(--c-text);font-size:16px;font-weight:600;margin-bottom:2px;}

/* FAQ */
.faq-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:12px;}
.faq-item{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  padding:0 20px;
  box-shadow:var(--sh-1);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:rgba(31,90,168,.35);box-shadow:var(--sh-2);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:16px 0;
  font-size:16px;
  font-weight:600;
  color:var(--c-text);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  min-height:44px;
  border-left:3px solid transparent;
  padding-left:12px;
  margin-left:-12px;
  transition:color .18s ease,border-color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-family:var(--font-num);font-size:20px;font-weight:400;color:var(--c-text-mute);flex:0 0 auto;
}
.faq-item[open] summary{color:var(--c-primary);border-left-color:var(--c-primary);}
.faq-item[open] summary::after{content:"–";color:var(--c-primary);}
.faq-item .faq-body{
  padding:2px 0 18px 12px;
  margin-left:-12px;
  font-size:15px;
  color:var(--c-text-sub);
  line-height:1.85;
  border-top:1px solid transparent;
}

/* comparison table */
.table-scroll{overflow-x:auto;border-radius:var(--r-card);}
.cmp{
  width:100%;
  min-width:720px;
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--c-surface);
  font-size:15px;
}
.cmp thead th{
  background:var(--c-primary-tint);
  color:var(--c-text);
  font-weight:600;
  text-align:left;
  height:48px;
  padding:0 18px;
  font-size:14px;
  border-bottom:1px solid var(--c-border);
  white-space:nowrap;
}
.cmp tbody td{
  padding:14px 18px;
  border-bottom:1px solid var(--c-border);
  color:var(--c-text-sub);
  line-height:1.7;
  vertical-align:top;
}
.cmp tbody tr:nth-child(even){background:#FAFCFF;}
.cmp tbody tr:last-child td{border-bottom:0;}
.cmp tbody td:first-child{color:var(--c-text);font-weight:600;white-space:nowrap;}
.cmp .col-hi{background:rgba(233,241,251,.55);}
.cmp thead th.col-hi{background:#DCE9F9;color:var(--c-primary-deep);}

/* section head */
.sec-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  margin-bottom:32px;
}
.sec-head h2{position:relative;padding-left:16px;margin:0;font-size:30px;}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;background:var(--c-primary);border-radius:2px;
}
.sec-head p{margin:8px 0 0 16px;font-size:15px;color:var(--c-text-sub);}

/* content card */
.info-card{
  display:grid;
  grid-template-columns:300px 1fr;
  gap:0;
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:all .2s ease;
}
.info-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:rgba(31,90,168,.3);}
.info-card__media{aspect-ratio:16/11;background:var(--c-primary-tint);}
.info-card__media img{width:100%;height:100%;object-fit:cover;}
.info-card__body{padding:26px 28px;}
.info-card__body h3{font-size:20px;margin:10px 0 10px;line-height:1.5;}
.info-card__body p{font-size:15px;margin-bottom:14px;line-height:1.8;}
.info-card__meta{display:flex;align-items:center;gap:16px;font-size:13px;color:var(--c-text-mute);font-family:var(--font-num);margin-bottom:14px;}

/* CTA band */
.cta-band{
  background:var(--c-primary-deep);
  padding:80px 0;
}
.cta-band__inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-band h2{color:#fff;margin:0 0 10px;font-size:30px;}
.cta-band p{color:rgba(255,255,255,.78);margin:0;font-size:16px;max-width:560px;}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap;}

/* footer */
.site-footer{
  background:var(--c-primary-deep);
  color:rgba(255,255,255,.72);
  padding:72px 0 72px;
  font-size:14px;
}
.site-footer .logo-text{color:#fff;}
.site-footer .logo-mark{background:#2E6FBF;}
.site-footer .logo-mark::after{background:#3FC3B4;}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.foot-brand p{color:rgba(255,255,255,.68);font-size:14px;line-height:1.85;margin:16px 0 0;max-width:340px;}
.foot-col h4{color:#fff;font-size:15px;margin:0 0 14px;font-weight:600;}
.foot-col ul{margin:0;padding:0;}
.foot-col li{margin-bottom:10px;}
.foot-col a{color:rgba(255,255,255,.72);font-size:14px;}
.foot-col a:hover{color:#fff;}
.foot-bottom{
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.6);
}

/* floating cta */
.float-cta{
  position:fixed;
  right:28px;
  bottom:28px;
  z-index:120;
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:52px;
  padding:0 24px;
  border-radius:var(--r-pill);
  background:var(--c-accent-amber);
  color:#fff;
  font-size:15px;
  font-weight:600;
  box-shadow:var(--sh-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:all .25s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:#cf7a2e;color:#fff;transform:translateY(-2px);box-shadow:var(--sh-3);}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  h1{font-size:34px;}
  .mega-panel{width:760px;}
  .mega-grid{grid-template-columns:1fr 1fr 1fr 1.2fr;gap:18px;}
}
@media (max-width:1023px){
  body{font-size:16px;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  .section{padding:72px 0;}
  .section--tight{padding:48px 0;}
  .cat-hero{padding:40px 0 48px;}
  .cat-layout{padding:48px 0 16px;}
  .nav-toggle{display:flex;}
  .nav-main{
    position:fixed;
    top:72px;left:0;right:0;bottom:0;
    background:#fff;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:16px 20px 120px;
    overflow-y:auto;
    border-top:1px solid var(--c-border);
    transform:translateY(-8px);
    opacity:0;
    visibility:hidden;
    transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
    z-index:85;
  }
  .nav-main.is-open{opacity:1;visibility:visible;transform:translateY(0);}
  .nav-item{width:100%;border-bottom:1px solid var(--c-border);}
  .nav-item:last-child{border-bottom:0;}
  .nav-link{width:100%;height:52px;padding:0 4px;justify-content:space-between;font-size:16px;border-radius:0;}
  .nav-item.is-active .nav-link::after{display:none;}
  .nav-item.is-active .nav-link{background:var(--c-primary-tint);padding-left:10px;}
  .mega-panel{
    position:static;
    width:100%;
    display:none;
    opacity:1;visibility:visible;transform:none;pointer-events:auto;
    box-shadow:none;border:0;border-radius:0;padding:6px 0 16px;
  }
  .mega-panel::before{display:none;}
  .has-mega.is-open .mega-panel{display:block;}
  .mega-grid{grid-template-columns:1fr 1fr;gap:14px;}
  .mega-col--entry{grid-column:1 / -1;}
  .mega-link{height:38px;line-height:38px;}
  .cat-toc{position:static;margin-bottom:24px;}
  .cat-toc ul{display:grid;grid-template-columns:1fr 1fr;gap:4px;}
  .cat-toc__cta{display:none;}
  .feature-row{grid-template-columns:1fr;gap:14px;}
  .faq-list{grid-template-columns:1fr;}
  .info-card{grid-template-columns:1fr;}
  .info-card__media{aspect-ratio:16/9;}
  .cta-band{padding:64px 0;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cat-block{padding:26px 22px;}
  .metric-item{flex:1 1 45%;border-left:0;padding:10px 0;}
  .metric-item:nth-child(odd){padding-right:16px;}
  .float-cta{
    right:0;left:0;bottom:0;
    width:100%;height:56px;
    border-radius:0;
    justify-content:center;
    font-size:16px;
  }
  .float-cta.is-visible{transform:none;}
  .float-cta:hover{transform:none;}
  .site-footer{padding-bottom:120px;}
}
@media (max-width:639px){
  .container{padding:0 20px;}
  h1{font-size:26px;}
  h2{font-size:22px;}
  .section{padding:48px 0;}
  .cat-hero__lede{font-size:16px;}
  .cat-hero__actions .btn{width:100%;}
  .cat-toc ul{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr;}
  .cat-block h2{font-size:21px;}
  .sec-head h2{font-size:22px;}
  .cta-band h2{font-size:22px;}
  .cta-band__actions .btn{width:100%;}
  .metric-item{flex:1 1 100%;}
  .metric-num{font-size:24px;}
  .step-list li{padding-left:48px;}
  .step-list li::before{width:34px;height:34px;}
}

/* roulang page: category3 */
:root{
  --c-primary:#1F5AA8;
  --c-primary-deep:#143C74;
  --c-primary-tint:#E9F1FB;
  --c-accent-teal:#17A398;
  --c-accent-amber:#E08A3C;
  --c-bg:#F6F8FC;
  --c-surface:#FFFFFF;
  --c-border:#E4EAF3;
  --c-text:#16202E;
  --c-text-sub:#5B6B80;
  --c-text-mute:#8A97A8;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --r-input:8px;
  --sh-1:0 1px 2px rgba(20,60,116,.06);
  --sh-2:0 12px 28px -18px rgba(20,60,116,.26);
  --sh-3:0 18px 40px -20px rgba(20,60,116,.3);
  --container:1200px;
  --sec-y:110px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",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-cn);
  font-size:17px;
  line-height:1.88;
  color:var(--c-text);
  background:var(--c-bg);
  letter-spacing:0;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;}
a:hover{color:var(--c-primary-deep);}
h1,h2,h3,h4,h5,h6{font-family:var(--font-cn);color:var(--c-text);margin:0 0 16px;line-height:1.3;font-weight:600;letter-spacing:0;}
h1{font-size:40px;line-height:1.25;font-weight:700;}
h2{font-size:30px;line-height:1.3;}
h3{font-size:22px;line-height:1.35;}
h4{font-size:18px;line-height:1.4;}
p{margin:0 0 18px;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0 0 18px;padding-left:22px;}
ul li,ol li{margin-bottom:8px;}
ul li::marker,ol li::marker{color:var(--c-primary);}
button{font-family:inherit;border:0;background:none;cursor:pointer;}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--c-accent-teal);outline-offset:2px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:var(--sec-y) 0;}
.section--alt{background:var(--c-surface);}
.section--tint{background:var(--c-primary-tint);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-num);
  font-size:12px;letter-spacing:.08em;color:var(--c-primary);
  background:var(--c-primary-tint);
  border-radius:var(--r-pill);
  padding:4px 14px;height:24px;margin-bottom:16px;font-weight:600;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent-teal);}
.section-title{position:relative;padding-left:14px;}
.section-title::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;border-radius:2px;background:var(--c-primary);}
.lead{font-size:17px;color:var(--c-text-sub);}
.muted{color:var(--c-text-sub);}
.tiny{font-size:13px;color:var(--c-text-mute);}
.caption{font-size:13px;color:var(--c-text-mute);text-align:center;margin-top:10px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;line-height:1.2;
  border:1px solid transparent;min-height:48px;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--c-primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-border);}
.btn-ghost:hover{background:var(--c-primary-tint);color:var(--c-primary-deep);border-color:rgba(31,90,168,.35);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;transform:translateY(-1px);}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--c-primary);padding:6px 0;border-bottom:3px solid rgba(31,90,168,.25);}
.btn-text:hover{color:var(--c-primary-deep);border-bottom-color:var(--c-primary);}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(160%) blur(6px);
  border-bottom:1px solid var(--c-border);
  transition:box-shadow .2s ease,background-color .2s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 20px -16px rgba(20,60,116,.4);background:rgba(255,255,255,.96);}
.nav-inner{
  width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;
  min-height:72px;display:flex;align-items:center;gap:24px;
}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--c-text);font-weight:700;font-size:18px;}
.logo:hover{color:var(--c-primary);}
.logo-mark{
  width:28px;height:28px;border-radius:8px;background:var(--c-primary);position:relative;flex:0 0 28px;
}
.logo-mark::after{content:"";position:absolute;inset:8px;border-radius:3px;background:#fff;}
.logo-text{white-space:nowrap;}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-item{position:relative;}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 14px;min-height:44px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;color:var(--c-text);position:relative;
}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-tint);}
.nav-item.is-active .nav-link{color:var(--c-primary);font-weight:600;}
.nav-item.is-active .nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--c-primary);
}
.mega-arrow{font-size:11px;transition:transform .2s ease;}
.nav-item.has-mega:hover .mega-arrow,
.nav-item.has-mega:focus-within .mega-arrow{transform:rotate(180deg);}
.mega-panel{
  position:absolute;top:calc(100% + 10px);right:0;width:780px;
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-3);padding:0 0 22px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
  overflow:hidden;
}
.mega-panel::before{content:"";display:block;height:3px;background:var(--c-primary);}
.nav-item.has-mega:hover .mega-panel,
.nav-item.has-mega:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1fr 1.25fr;gap:22px;padding:24px 24px 0;}
.mega-title{font-size:12px;font-weight:700;color:var(--c-text-mute);letter-spacing:.04em;margin-bottom:10px;}
.mega-link{
  display:block;padding:9px 8px;border-radius:8px;font-size:14px;color:var(--c-text-sub);line-height:1.4;min-height:40px;
}
.mega-link:hover{color:var(--c-primary);background:var(--c-primary-tint);transform:translateX(2px);}
.mega-feature{background:var(--c-bg);border:1px solid var(--c-border);border-radius:var(--r-card);padding:12px;}
.mega-feature .ratio{aspect-ratio:16/9;}
.mega-feature h5{font-size:15px;margin:12px 0 6px;line-height:1.45;}
.mega-feature p{font-size:13px;color:var(--c-text-sub);margin:0 0 8px;}
.mega-feature .date{font-size:12px;color:var(--c-text-mute);font-family:var(--font-num);}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--c-border);border-radius:var(--r-btn);background:#fff;position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:12px;right:12px;height:2px;border-radius:2px;background:var(--c-text);
}
.nav-toggle span{top:21px;transition:background .2s ease;}
.nav-toggle span::before{content:"";left:0;right:0;top:-7px;}
.nav-toggle span::after{content:"";left:0;right:0;top:7px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:rotate(45deg);top:0;}
.nav-toggle[aria-expanded="true"] span::after{transform:rotate(-45deg);top:0;}

/* 面包屑 */
.crumb-bar{background:var(--c-surface);border-bottom:1px solid var(--c-border);}
.crumb{display:flex;align-items:center;gap:10px;height:40px;font-size:14px;color:var(--c-text-sub);overflow:hidden;}
.crumb a{color:var(--c-text-sub);}
.crumb a:hover{color:var(--c-primary);}
.crumb .sep{color:var(--c-text-mute);}
.crumb .current{color:var(--c-text-mute);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
img.cover{width:100%;height:100%;object-fit:cover;border-radius:var(--r-img);}
.ratio{position:relative;overflow:hidden;border-radius:var(--r-img);background:var(--c-primary-tint);}
.ratio-16-9{aspect-ratio:16/9;}
.ratio-16-10{aspect-ratio:16/10;}
.ratio-4-3{aspect-ratio:4/3;}

/* Hero */
.hero-int{position:relative;padding:76px 0 64px;background:var(--c-surface);border-bottom:1px solid var(--c-border);overflow:hidden;}
.hero-int::after{
  content:"";position:absolute;right:-60px;top:-40px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle at center,rgba(31,90,168,.10),rgba(31,90,168,0) 68%);
  pointer-events:none;
}
.hero-int .dots{
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(31,90,168,.10) 1px,transparent 1px);
  background-size:20px 20px;
  opacity:.5;pointer-events:none;
}
.hero-int .hero-inner{position:relative;z-index:1;}
.hero-int h1{margin-bottom:18px;}
.hero-int .sub{font-size:18px;color:var(--c-text-sub);max-width:640px;margin-bottom:22px;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-primary-tint);color:var(--c-primary);font-size:12px;font-weight:600;letter-spacing:0;
}
.badge-teal{background:rgba(23,163,152,.12);color:#117C74;}
.badge-amber{background:rgba(224,138,60,.14);color:#A85F1C;}
.hero-visual{position:relative;}
.hero-visual .ratio{border:1px solid var(--c-border);box-shadow:var(--sh-2);}
.float-card{
  position:absolute;left:-18px;bottom:-22px;background:#fff;border:1px solid var(--c-border);
  border-radius:var(--r-card);box-shadow:var(--sh-2);padding:14px 18px;min-width:190px;
}
.float-card .num{font-family:var(--font-num);font-size:26px;font-weight:700;color:var(--c-primary);line-height:1.1;}
.float-card .lbl{font-size:12px;color:var(--c-text-mute);}
.metric-row{
  display:flex;flex-wrap:wrap;margin-top:52px;border-top:1px solid var(--c-border);padding-top:26px;
}
.metric{
  flex:1 1 200px;padding:0 24px;border-left:1px solid var(--c-border);
}
.metric:first-child{border-left:0;padding-left:0;}
.metric .num{font-family:var(--font-num);font-size:28px;font-weight:700;color:var(--c-text);line-height:1.2;}
.metric .num em{font-style:normal;font-size:15px;color:var(--c-text-sub);margin-left:4px;}
.metric .lbl{font-size:12px;color:var(--c-text-mute);margin-top:4px;}

/* 卡片矩阵 */
.matrix{gap:0;}
.mcard{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:26px;height:100%;
  display:flex;flex-direction:column;
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.mcard:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:rgba(31,90,168,.3);}
.mcard h3{font-size:20px;margin:14px 0 10px;}
.mcard p{color:var(--c-text-sub);font-size:15px;margin-bottom:16px;}
.mcard .btn-text{margin-top:auto;align-self:flex-start;}
.mcard--tall{padding:0 0 26px;}
.mcard--tall .ratio{border-radius:var(--r-card) var(--r-card) 0 0;}
.mcard--tall .mcard-body{padding:24px 26px 0;}
.mcard--tint{background:var(--c-primary-tint);border-color:rgba(31,90,168,.2);}
.mcard--dark{background:var(--c-primary-deep);border-color:var(--c-primary-deep);color:#fff;}
.mcard--dark h3,.mcard--dark p{color:#fff;}
.mcard--dark p{color:rgba(255,255,255,.78);}
.mcard--dark .badge{background:rgba(255,255,255,.14);color:#fff;}
.grid-gap > .cell{margin-bottom:28px;}

/* 时间轴 */
.timeline-wrap{background:var(--c-surface);}
.timeline{
  display:flex;gap:0;margin:0;padding:0 0 8px;list-style:none;overflow-x:auto;
  -webkit-overflow-scrolling:touch;scrollbar-width:none;
}
.timeline::-webkit-scrollbar{display:none;}
.tl-item{
  position:relative;flex:1 0 220px;padding:36px 22px 0 0;margin:0;
}
.tl-item::before{
  content:"";position:absolute;top:9px;left:0;right:0;height:1px;background:var(--c-border);
}
.tl-item:last-child::before{background:linear-gradient(90deg,var(--c-border),transparent);}
.tl-dot{
  position:absolute;top:2px;left:0;width:16px;height:16px;border-radius:50%;
  background:#fff;border:3px solid var(--c-accent-teal);box-shadow:0 0 0 4px rgba(23,163,152,.12);
}
.tl-step{font-family:var(--font-num);font-size:12px;font-weight:700;color:var(--c-accent-teal);letter-spacing:.06em;}
.tl-item h4{font-size:17px;margin:6px 0 8px;}
.tl-item p{font-size:14px;color:var(--c-text-sub);margin:0;}

/* 清单/范围 */
.scope-list{list-style:none;padding:0;margin:0;}
.scope-list li{
  display:flex;gap:12px;padding:16px 0;border-bottom:1px dashed var(--c-border);margin:0;
}
.scope-list li:last-child{border-bottom:0;}
.scope-list .k{flex:0 0 96px;font-weight:600;color:var(--c-primary);font-size:15px;}
.scope-list .v{font-size:15px;color:var(--c-text-sub);}
.scope-panel{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:12px 26px;}

/* 资讯卡 */
.news-card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;height:100%;
  display:flex;flex-direction:column;transition:box-shadow .2s ease,transform .2s ease;
}
.news-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);}
.news-card .ratio{border-radius:var(--r-card) var(--r-card) 0 0;}
.news-card .nc-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;}
.news-card h3{font-size:19px;margin:12px 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card p{font-size:15px;color:var(--c-text-sub);margin:0 0 16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card .meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--c-text-mute);font-family:var(--font-num);}

/* CTA 带 */
.cta-band{background:var(--c-primary-deep);color:#fff;padding:96px 0;}
.cta-band h2{color:#fff;margin-bottom:12px;}
.cta-band p{color:rgba(255,255,255,.8);margin:0;max-width:640px;}
.cta-band .btn-primary{background:#fff;color:var(--c-primary-deep);}
.cta-band .btn-primary:hover{background:var(--c-primary-tint);color:var(--c-primary-deep);}

/* 浮动 CTA */
.float-cta{
  position:fixed;right:26px;bottom:26px;z-index:80;
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 24px;border-radius:var(--r-pill);
  background:var(--c-accent-amber);color:#fff;font-size:15px;font-weight:600;
  box-shadow:0 14px 30px -14px rgba(224,138,60,.7);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,box-shadow .2s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{color:#fff;transform:translateY(-2px);box-shadow:0 20px 36px -14px rgba(224,138,60,.85);}

/* 页脚 */
.site-footer{background:var(--c-primary-deep);color:rgba(255,255,255,.78);padding:78px 0 72px;}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.foot-brand .logo{color:#fff;font-size:18px;margin-bottom:16px;}
.foot-brand p{font-size:14px;color:rgba(255,255,255,.72);max-width:340px;line-height:1.85;}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:0;}
.foot-col ul{list-style:none;padding:0;margin:0;}
.foot-col li{margin-bottom:10px;}
.foot-col a{color:rgba(255,255,255,.78);font-size:14px;display:inline-block;min-height:28px;line-height:28px;}
.foot-col a:hover{color:#fff;transform:translateX(2px);}
.foot-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.16);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.62);
}

/* 响应式 */
@media (max-width:1279px){
  h1{font-size:36px;}
  :root{--sec-y:96px;}
}
@media (max-width:1023px){
  :root{--sec-y:72px;}
  h1{font-size:32px;}
  h2{font-size:26px;}
  .hero-int{padding:56px 0 48px;}
  .metric{padding:0 16px;flex:1 1 160px;}
  .float-card{position:static;margin-top:16px;left:auto;bottom:auto;display:inline-block;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .nav-toggle{display:block;}
  .nav-main{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:2px;margin-left:0;
    background:#fff;border-bottom:1px solid var(--c-border);box-shadow:var(--sh-3);
    padding:12px 16px 20px;
    display:none;
  }
  .nav-main.is-open{display:flex;}
  .nav-item{width:100%;}
  .nav-link{width:100%;justify-content:space-between;padding:13px 12px;}
  .nav-item.is-active .nav-link::after{display:none;}
  .nav-item.is-active .nav-link{background:var(--c-primary-tint);border-radius:var(--r-btn);}
  .mega-panel{
    position:static;width:100%;opacity:1;visibility:visible;transform:none;
    border:0;box-shadow:none;padding:0 0 8px;display:none;
  }
  .mega-panel::before{display:none;}
  .nav-item.has-mega.is-open .mega-panel{display:block;}
  .nav-item.has-mega:hover .mega-panel{display:none;}
  .nav-item.has-mega.is-open:hover .mega-panel{display:block;}
  .mega-grid{grid-template-columns:1fr 1fr;padding:12px 12px 0;gap:12px;}
  .mega-feature{grid-column:1 / -1;}
  .tl-item{flex:0 0 240px;padding-right:18px;}
}
@media (max-width:639px){
  body{font-size:16px;padding-bottom:72px;}
  :root{--sec-y:48px;}
  .container{padding:0 20px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  h3{font-size:18px;}
  h4{font-size:16px;}
  .hero-int{padding:40px 0 36px;}
  .hero-int .sub{font-size:16px;}
  .btn-row .btn{width:100%;}
  .metric{flex:1 1 100%;border-left:0;padding:14px 0;border-top:1px solid var(--c-border);}
  .metric:first-child{border-top:0;padding-top:0;}
  .metric-row{margin-top:32px;}
  .mcard{padding:22px;}
  .mcard--tall{padding:0 0 22px;}
  .mcard--tall .mcard-body{padding:20px 22px 0;}
  .scope-list li{flex-direction:column;gap:4px;}
  .scope-list .k{flex:none;}
  .foot-grid{grid-template-columns:1fr;}
  .cta-band{padding:60px 0;}
  .cta-band .btn{width:100%;}
  .float-cta{
    right:0;left:0;bottom:0;border-radius:0;width:100%;height:56px;
    justify-content:center;padding:0 16px;font-size:15px;
    transform:translateY(0);opacity:1;visibility:visible;
    box-shadow:0 -8px 20px -14px rgba(20,60,116,.5);
  }
  .float-cta.is-visible{transform:translateY(0);}
  .site-footer{padding-bottom:96px;}
}

/* roulang page: category4 */
/* ============ 设计变量 ============ */
:root{
  --c-primary:#1F5AA8;
  --c-primary-deep:#143C74;
  --c-primary-tint:#E9F1FB;
  --c-accent-teal:#17A398;
  --c-accent-amber:#E08A3C;
  --c-bg:#F6F8FC;
  --c-surface:#FFFFFF;
  --c-border:#E4EAF3;
  --c-text:#16202E;
  --c-text-sub:#5B6B80;
  --c-text-mute:#8A97A8;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-input:8px;
  --sh-1:0 1px 2px rgba(20,60,116,.06);
  --sh-2:0 12px 28px -18px rgba(20,60,116,.26);
  --sh-3:0 18px 40px -20px rgba(20,60,116,.3);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  letter-spacing:0;
  overflow-x:hidden;
  padding-bottom:0;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
h1,h2,h3,h4,h5,h6{
  margin:0 0 14px;
  font-family:var(--font-cn);
  font-weight:600;
  line-height:1.3;
  color:var(--c-text);
  letter-spacing:0;
}
h1{font-size:40px}
h2{font-size:30px}
h3{font-size:22px}
h4{font-size:18px}
h5{font-size:16px}
h6{font-size:14px}
p{margin:0 0 16px}
ul,ol{margin:0 0 16px;padding-left:1.2em}
li{margin-bottom:8px}
a{
  color:var(--c-primary);
  text-decoration:none;
  transition:color .18s ease,background-color .18s ease,border-color .18s ease,transform .18s ease;
}
a:hover{color:var(--c-primary-deep)}
button,input,select,textarea{font-family:inherit;font-size:inherit;line-height:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--c-accent-teal);outline-offset:2px;border-radius:4px}

/* Foundation 覆盖 */
.button,button.button{
  border-radius:var(--r-btn);
  background:var(--c-primary);
  color:#fff;
  padding:14px 26px;
  font-weight:500;
  font-size:16px;
  border:1px solid var(--c-primary);
  transition:all .18s ease;
}
.button:hover,button.button:hover{background:var(--c-primary-deep);border-color:var(--c-primary-deep);color:#fff;transform:translateY(-1px)}
.button:active{transform:translateY(1px)}
.menu{background:transparent}
.menu a{color:var(--c-text);padding:0}
table{border-collapse:collapse;background:transparent}
input[type="text"],input[type="tel"],input[type="email"],select,textarea{
  height:48px;
  border:1px solid var(--c-border);
  border-radius:var(--r-input);
  padding:0 14px;
  background:#fff;
  width:100%;
  transition:border-color .18s ease,box-shadow .18s ease;
}
textarea{height:auto;min-height:120px;padding:12px 14px;line-height:1.7}
input:focus,select:focus,textarea:focus{border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(31,90,168,.15);outline:none}

/* ============ 容器与板块 ============ */
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.section{padding:104px 0}
.section--tight{padding:72px 0}
.section--alt{background:var(--c-surface)}
.section-head{margin-bottom:44px;max-width:760px}
.section-head .sec-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--c-primary);
  background:var(--c-primary-tint);
  border-radius:999px;padding:4px 14px;margin-bottom:14px;
  font-family:var(--font-num);
}
.sec-title{position:relative;padding-left:16px;font-size:30px}
.sec-title::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  background:var(--c-primary);border-radius:2px;
}
.sec-desc{color:var(--c-text-sub);font-size:16px;margin:0}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--c-border);
  transition:box-shadow .22s ease,background-color .22s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);background:rgba(255,255,255,.98)}
.nav-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;
  height:72px;display:flex;align-items:center;gap:28px;
}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--c-text);font-weight:700;font-size:18px}
.logo:hover{color:var(--c-primary)}
.logo-mark{
  width:30px;height:30px;border-radius:9px;
  background:var(--c-primary);position:relative;flex:0 0 30px;
}
.logo-mark::before{
  content:"";position:absolute;left:8px;top:8px;width:14px;height:14px;
  border:2px solid #fff;border-radius:4px;
}
.logo-mark::after{
  content:"";position:absolute;right:5px;bottom:5px;width:8px;height:8px;border-radius:50%;
  background:var(--c-accent-teal);
}
.logo-text{white-space:nowrap}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-item{position:relative}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;
  height:72px;padding:0 14px;
  font-size:15.5px;color:var(--c-text);font-weight:500;
  border-bottom:2px solid transparent;background:none;
}
.nav-link:hover{color:var(--c-primary)}
.nav-item.is-active .nav-link{color:var(--c-primary);border-bottom-color:var(--c-primary)}
.mega-arrow{font-size:11px;transition:transform .2s ease}
.nav-item.has-mega.is-open .mega-arrow{transform:rotate(180deg)}

/* Mega 面板 */
.mega-panel{
  position:absolute;top:72px;right:0;width:840px;
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-3);
  padding:26px 26px 24px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
  z-index:130;
}
.mega-panel::before{
  content:"";position:absolute;top:0;left:24px;right:24px;height:3px;border-radius:0 0 3px 3px;
  background:var(--c-primary);
}
.nav-item.has-mega:hover .mega-panel,
.nav-item.has-mega:focus-within .mega-panel,
.nav-item.has-mega.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1fr 1.2fr;gap:26px}
.mega-title{font-size:13px;font-weight:700;color:var(--c-text-mute);margin-bottom:10px;font-family:var(--font-num)}
.mega-link{
  display:block;line-height:40px;font-size:15px;color:var(--c-text);
  border-radius:6px;padding:0 8px;margin-left:-8px;
}
.mega-link:hover{color:var(--c-primary);transform:translateX(2px);background:var(--c-primary-tint)}
.mega-card{
  border:1px solid var(--c-border);border-radius:var(--r-card);overflow:hidden;
  background:var(--c-surface);box-shadow:var(--sh-1);
}
.mega-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--c-primary-tint)}
.mega-card .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0}
.mega-card-body{padding:14px 16px 16px}
.mega-card-body h5{font-size:15px;margin:0 0 6px;line-height:1.5}
.mega-card-body p{margin:0;font-size:14px;color:var(--c-text-sub);line-height:1.6}
.mega-card-date{display:block;margin-top:10px;font-size:12px;color:var(--c-text-mute);font-family:var(--font-num)}

.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--c-border);background:#fff;align-items:center;justify-content:center;
}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--c-text);border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-text);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ============ 面包屑 ============ */
.crumb-wrap{background:var(--c-surface);border-bottom:1px solid var(--c-border)}
.crumb{
  display:flex;align-items:center;gap:10px;min-height:48px;
  font-size:14px;color:var(--c-text-sub);flex-wrap:wrap;
}
.crumb a{color:var(--c-text-sub)}
.crumb a:hover{color:var(--c-primary)}
.crumb .sep{color:var(--c-text-mute)}
.crumb .current{color:var(--c-text-mute)}

/* ============ 页面头部横幅 ============ */
.cat-hero{
  background:linear-gradient(180deg,var(--c-primary-tint) 0%,#F4F8FD 100%);
  border-bottom:1px solid var(--c-border);
  position:relative;
  overflow:hidden;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(31,90,168,.10) 1px,transparent 1px);
  background-size:22px 22px;opacity:.7;pointer-events:none;
}
.cat-hero-inner{position:relative;z-index:2;padding:72px 0 68px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center}
.hero-copy .hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--c-border);border-radius:999px;
  padding:6px 14px;font-size:13px;color:var(--c-primary);font-weight:600;
  box-shadow:var(--sh-1);margin-bottom:20px;
}
.hero-copy .hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--c-accent-teal);display:block}
.hero-copy h1{font-size:40px;line-height:1.3;margin-bottom:16px}
.hero-copy h1 em{font-style:normal;color:var(--c-primary)}
.hero-copy .lead{font-size:17px;color:var(--c-text-sub);max-width:560px;margin-bottom:26px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:30px}
.hero-facts{display:flex;gap:0;flex-wrap:wrap;border-top:1px solid rgba(20,60,116,.12);padding-top:22px}
.hero-fact{padding:0 26px;border-left:1px solid rgba(20,60,116,.12)}
.hero-fact:first-child{padding-left:0;border-left:0}
.hero-fact strong{display:block;font-family:var(--font-num);font-size:28px;font-weight:700;color:var(--c-primary-deep);line-height:1.2}
.hero-fact span{font-size:12px;color:var(--c-text-sub)}
.hero-visual{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-2);background:#fff;border:1px solid var(--c-border);
}
.hero-visual .ratio{aspect-ratio:16/10;overflow:hidden;background:var(--c-primary-tint)}
.hero-visual .ratio img{width:100%;height:100%;object-fit:cover;border-radius:0}
.hero-float{
  position:absolute;left:22px;bottom:22px;right:22px;
  background:#fff;border-radius:var(--r-card);border:1px solid var(--c-border);
  box-shadow:var(--sh-2);padding:14px 18px;display:flex;align-items:center;gap:16px;
}
.hero-float .dot{width:10px;height:10px;border-radius:50%;background:var(--c-accent-teal);flex:0 0 10px}
.hero-float b{font-size:15px;display:block}
.hero-float small{font-size:12.5px;color:var(--c-text-sub)}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-btn);font-weight:500;font-size:16px;padding:14px 26px;border:1px solid transparent;transition:all .18s ease;cursor:pointer}
.btn-primary{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
.btn-primary:hover{background:var(--c-primary-deep);border-color:var(--c-primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-border)}
.btn-ghost:hover{background:var(--c-primary-tint);border-color:rgba(31,90,168,.3);color:var(--c-primary);transform:translateY(-1px)}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-outline-light:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-1px)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-primary);border-bottom:3px solid rgba(31,90,168,.25);padding-bottom:2px}
.link-more:hover{border-bottom-color:var(--c-primary);color:var(--c-primary-deep)}

/* ============ 编号清单 ============ */
.layout-grid{display:grid;grid-template-columns:minmax(0,1.85fr) minmax(0,1fr);gap:48px;align-items:start}
.num-list{display:flex;flex-direction:column;gap:16px}
.num-item{
  display:grid;grid-template-columns:78px minmax(0,1fr);gap:20px;
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:26px 28px;box-shadow:var(--sh-1);transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.num-item:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:rgba(31,90,168,.3)}
.num-item .num{
  font-family:var(--font-num);font-size:32px;font-weight:700;color:var(--c-primary);
  line-height:1;padding-top:2px;position:relative;
}
.num-item .num::after{content:"";position:absolute;left:0;bottom:-14px;width:30px;height:2px;background:var(--c-accent-teal);border-radius:2px}
.num-item h3{font-size:20px;margin-bottom:8px}
.num-item p{margin:0;color:var(--c-text-sub);font-size:15.5px}
.num-item .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;
  background:var(--c-primary-tint);color:var(--c-primary);font-size:12px;font-weight:600;
}
.badge--plain{background:#F1F5FA;color:var(--c-text-sub)}

/* ============ 侧栏入口卡 ============ */
.side-col{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
}
.side-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--c-primary-tint)}
.side-card .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0}
.side-card-body{padding:20px 22px 22px}
.side-card-body h3{font-size:18px;margin-bottom:10px}
.side-card-body p{font-size:14.5px;color:var(--c-text-sub);margin-bottom:16px}
.side-list{list-style:none;padding:0;margin:0}
.side-list li{
  display:flex;align-items:flex-start;gap:10px;font-size:14.5px;color:var(--c-text-sub);
  padding:9px 0;border-bottom:1px dashed var(--c-border);
}
.side-list li:last-child{border-bottom:0}
.side-list li::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent-teal);
  margin-top:9px;flex:0 0 6px;
}
.side-card--deep{background:var(--c-primary-deep);border-color:var(--c-primary-deep);color:#fff}
.side-card--deep h3{color:#fff}
.side-card--deep p{color:rgba(255,255,255,.82)}
.side-card--deep .side-list li{color:rgba(255,255,255,.86);border-bottom-color:rgba(255,255,255,.16)}
.side-card--deep .side-list li::before{background:var(--c-accent-amber)}
.side-card--deep .btn-ghost{background:#fff;border-color:#fff;color:var(--c-primary-deep)}
.side-card--deep .btn-ghost:hover{background:rgba(255,255,255,.86);color:var(--c-primary-deep)}
.side-card-pad{padding:22px}

/* ============ 折叠面板 ============ */
.acc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.acc-item{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.acc-item:hover{border-color:rgba(31,90,168,.3)}
.acc-item[open]{box-shadow:var(--sh-2)}
.acc-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:14px;
  padding:18px 20px;font-size:16.5px;font-weight:600;color:var(--c-text);min-height:56px;
}
.acc-item summary::-webkit-details-marker{display:none}
.acc-item summary::after{
  content:"+";margin-left:auto;font-size:20px;font-weight:700;color:var(--c-primary);line-height:1;
}
.acc-item[open] summary{color:var(--c-primary);box-shadow:inset 3px 0 0 var(--c-primary)}
.acc-item[open] summary::after{content:"–"}
.acc-body{padding:0 20px 20px 20px;font-size:15.5px;color:var(--c-text-sub);border-top:1px solid var(--c-border);padding-top:16px;margin-top:0}

/* ============ 参数表格 ============ */
.table-wrap{
  overflow-x:auto;border:1px solid var(--c-border);border-radius:var(--r-card);
  background:var(--c-surface);box-shadow:var(--sh-1);
}
.spec-table{width:100%;min-width:760px;border-collapse:collapse}
.spec-table th{
  background:var(--c-primary-tint);color:var(--c-primary-deep);
  text-align:left;font-size:14.5px;font-weight:600;padding:15px 18px;
  border-bottom:1px solid var(--c-border);white-space:nowrap;
}
.spec-table td{
  padding:14px 18px;font-size:15px;color:var(--c-text-sub);
  border-bottom:1px solid var(--c-border);height:48px;
}
.spec-table tbody tr:nth-child(even){background:#FAFCFF}
.spec-table tbody tr:last-child td{border-bottom:0}
.spec-table td:first-child{color:var(--c-text);font-weight:600}
.spec-note{font-size:13px;color:var(--c-text-mute);margin-top:12px}

/* ============ 指标条 ============ */
.metrics{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  border:1px solid var(--c-border);border-radius:var(--r-card);
  background:var(--c-surface);box-shadow:var(--sh-1);overflow:hidden;
}
.metric{padding:26px 24px;border-left:1px solid var(--c-border)}
.metric:first-child{border-left:0}
.metric strong{display:block;font-family:var(--font-num);font-size:28px;font-weight:700;color:var(--c-primary-deep);line-height:1.2}
.metric span{font-size:13px;color:var(--c-text-sub)}

/* ============ 推荐资讯卡 ============ */
.news-card{
  display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);transition:box-shadow .2s ease,transform .2s ease;
}
.news-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.news-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--c-primary-tint);height:100%}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0}
.news-card-body{padding:26px 28px;display:flex;flex-direction:column}
.news-card-body h3{font-size:21px;margin:12px 0 10px;line-height:1.45}
.news-card-body p{color:var(--c-text-sub);font-size:15.5px;margin-bottom:18px}
.news-meta{margin-top:auto;display:flex;align-items:center;gap:16px;font-size:13px;color:var(--c-text-mute);font-family:var(--font-num)}

/* ============ CTA 带 ============ */
.cta-band{
  background:var(--c-primary-deep);color:#fff;padding:96px 0;
}
.cta-band-inner{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:40px;align-items:center}
.cta-band h2{color:#fff;font-size:30px;margin-bottom:14px}
.cta-band p{color:rgba(255,255,255,.82);margin:0;font-size:16px;max-width:620px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:200;
  display:inline-flex;align-items:center;gap:10px;
  background:var(--c-primary);color:#fff;font-size:15px;font-weight:600;
  padding:14px 24px;border-radius:999px;box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:all .24s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--c-primary-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-3)}
.float-cta .pulse{width:8px;height:8px;border-radius:50%;background:var(--c-accent-amber);display:block}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-primary-deep);color:rgba(255,255,255,.82);padding:72px 0 0;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.foot-brand .logo{color:#fff}
.foot-brand .logo:hover{color:#fff}
.foot-brand .logo-mark{background:#fff}
.foot-brand .logo-mark::before{border-color:var(--c-primary-deep)}
.foot-brand p{margin-top:16px;font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.72);max-width:340px}
.foot-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.foot-col ul{list-style:none;padding:0;margin:0}
.foot-col li{margin-bottom:10px}
.foot-col a{color:rgba(255,255,255,.76);font-size:14.5px}
.foot-col a:hover{color:#fff}
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.14);
  padding:22px 0 30px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.62);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .mega-panel{width:760px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .cat-hero-inner{padding:56px 0}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .layout-grid{grid-template-columns:1fr;gap:36px}
  .side-col{position:static}
  .cta-band{padding:72px 0}
  .cta-band-inner{grid-template-columns:1fr;gap:28px}
  .cta-actions{justify-content:flex-start}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .metrics{grid-template-columns:1fr 1fr}
  .metric:nth-child(3){border-left:0}
  .metric:nth-child(n+3){border-top:1px solid var(--c-border)}

  .nav-toggle{display:inline-flex}
  .nav-main{
    position:fixed;top:72px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--c-border);
    box-shadow:var(--sh-3);
    flex-direction:column;align-items:stretch;gap:0;
    padding:8px 16px 20px;max-height:calc(100vh - 72px);overflow-y:auto;
    transform:translateY(-12px);opacity:0;visibility:hidden;transition:all .22s ease;
  }
  .nav-main.is-open{transform:translateY(0);opacity:1;visibility:visible}
  .nav-item{border-bottom:1px solid var(--c-border)}
  .nav-link{height:52px;width:100%;justify-content:space-between;padding:0 6px;border-bottom:0;font-size:16px}
  .nav-item.is-active .nav-link{color:var(--c-primary);border-bottom:0}
  .mega-panel{
    position:static;width:100%;opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:0;border-radius:0;padding:0 0 12px;display:none;
  }
  .mega-panel::before{display:none}
  .nav-item.has-mega.is-open .mega-panel{display:block}
  .mega-grid{grid-template-columns:1fr 1fr;gap:14px}
  .mega-card{grid-column:1 / -1}
  .mega-link{line-height:38px}
}
@media (max-width:639px){
  body{font-size:16px}
  .container{padding:0 20px}
  .section{padding:48px 0}
  h1,.hero-copy h1{font-size:28px}
  h2,.sec-title,.cta-band h2{font-size:22px}
  h3{font-size:18px}
  .cat-hero-inner{padding:44px 0}
  .hero-copy .lead{font-size:16px}
  .hero-actions{gap:12px}
  .hero-actions .btn{width:100%}
  .hero-facts{display:grid;grid-template-columns:1fr 1fr;gap:18px 0}
  .hero-fact{padding:0 14px}
  .hero-fact:nth-child(3){padding-left:0;border-left:0}
  .hero-float{left:14px;right:14px;bottom:14px;padding:12px 14px}
  .num-item{grid-template-columns:1fr;gap:12px;padding:22px 20px}
  .num-item .num{font-size:26px}
  .acc-grid{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr}
  .metric{border-left:0;border-top:1px solid var(--c-border);padding:20px}
  .metric:first-child{border-top:0}
  .news-card{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;gap:8px}
  .site-footer{padding-bottom:72px}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;width:100%;
    justify-content:center;height:56px;padding:0 16px;font-size:15px;
  }
  .float-cta.is-visible{transform:translateY(0)}
  .float-cta:hover{transform:translateY(0)}
  .mega-grid{grid-template-columns:1fr}
}