/* roulang page: index */
:root{
  --bg:#F6F8FB;
  --panel:#FFFFFF;
  --band:#EDF2F9;
  --primary:#1D4E89;
  --primary-dark:#163C69;
  --primary-light:#E8EFF8;
  --accent:#F0864A;
  --accent-light:#FDEBE0;
  --text:#1B2430;
  --muted:#5B6675;
  --line:#E4EAF2;
  --line-soft:#E7EDF5;
  --r:12px;
  --r-sm:8px;
  --sh:0 6px 20px rgba(23,60,105,.07);
  --sh-h:0 12px 28px rgba(23,60,105,.12);
  --nav-w:248px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--text);}
h1{font-size:40px;line-height:1.28;letter-spacing:-.5px;}
h2{font-size:28px;letter-spacing:-.2px;}
h3{font-size:20px;line-height:1.5;}
p{margin:0;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent);}
img{display:block;max-width:100%;height:auto;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
::selection{background:var(--primary-light);color:var(--primary-dark);}

/* ===== 布局骨架 ===== */
.app{display:flex;min-height:100vh;}
.side-nav{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  background:#fff;border-right:1px solid var(--line);
  padding:22px 16px;display:flex;flex-direction:column;gap:20px;
  overflow-y:auto;z-index:1040;
}
.content{margin-left:var(--nav-w);flex:1 1 auto;min-width:0;display:flex;flex-direction:column;min-height:100vh;}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;}

/* ===== 侧栏品牌 ===== */
.brand{display:flex;align-items:center;gap:11px;padding:2px 4px;color:var(--text);}
.brand:hover{color:var(--text);}
.brand__mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:10px;
  background:var(--primary);color:#fff;display:grid;place-items:center;
  font-weight:700;font-size:15px;letter-spacing:.5px;
}
.brand__text{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.brand__name{font-weight:700;font-size:15px;white-space:nowrap;}
.brand__sub{font-size:12px;color:var(--muted);white-space:nowrap;}

.nav-group__title{font-size:12px;letter-spacing:.08em;color:#8794A6;padding:0 10px;margin-bottom:8px;font-weight:600;}
.nav-list{display:flex;flex-direction:column;gap:2px;}
.nav-link{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--r-sm);
  color:#3A4658;font-size:14.5px;font-weight:500;position:relative;
  transition:background .2s ease,color .2s ease;white-space:nowrap;
}
.nav-link i{width:18px;text-align:center;font-size:14px;opacity:.85;}
.nav-link:hover{background:#F3F7FC;color:var(--primary);}
.nav-link.is-active{background:var(--primary-light);color:var(--primary);font-weight:700;}
.nav-link.is-active::before{
  content:"";position:absolute;left:-16px;top:7px;bottom:7px;width:3px;
  border-radius:0 3px 3px 0;background:var(--accent);
}
.side-cta{margin-top:auto;background:var(--primary-light);border-radius:var(--r);padding:16px;}
.side-cta p{font-size:13px;line-height:1.6;color:#3A4658;margin-bottom:10px;}
.side-cta .m-btn{width:100%;height:40px;font-size:14px;}

/* ===== 按钮 ===== */
.m-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-sm);font-size:15px;font-weight:500;
  border:1px solid transparent;cursor:pointer;transition:all .2s ease;
  text-align:center;line-height:1;white-space:nowrap;
}
.m-btn--primary{background:var(--primary);color:#fff;}
.m-btn--primary:hover{background:var(--accent);color:#fff;transform:translateY(-1px);}
.m-btn--outline{background:#fff;color:var(--primary);border-color:#C9DAEE;}
.m-btn--outline:hover{background:var(--primary-light);border-color:var(--primary);color:var(--primary-dark);transform:translateY(-1px);}
.m-btn--sm{height:38px;padding:0 18px;font-size:14px;}

/* ===== 顶部移动栏 ===== */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:1050;
  background:#fff;border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;padding:0 18px;
}
.topbar .brand__mark{width:32px;height:32px;flex:0 0 32px;border-radius:9px;font-size:13px;}
.topbar .brand__sub{display:none;}
.hamb{
  width:42px;height:42px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:#fff;color:var(--primary);font-size:17px;display:grid;place-items:center;cursor:pointer;
}
.hamb:hover{background:var(--primary-light);}

/* ===== 通用板块 ===== */
.section{padding:80px 0;}
.section--band{background:var(--band);}
.section--white{background:#fff;}
.sec-head{max-width:780px;margin-bottom:40px;}
.sec-head h2{font-size:28px;}
.sec-head p{margin-top:12px;color:var(--muted);font-size:16px;max-width:760px;}
.kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--primary);background:var(--primary-light);border-radius:999px;
  padding:5px 14px;margin-bottom:16px;
}
.kicker--accent{background:var(--accent-light);color:#C4591F;}

/* ===== 卡片与网格 ===== */
.grid{display:grid;gap:24px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
.card-m{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r);
  box-shadow:var(--sh);transition:box-shadow .2s ease,transform .2s ease;
  overflow:hidden;height:100%;display:flex;flex-direction:column;
}
.card-m:hover{box-shadow:var(--sh-h);transform:translateY(-2px);}
.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--band);}
.thumb--43{aspect-ratio:4/3;}
.thumb--11{aspect-ratio:1/1;}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.card-m:hover .thumb img{transform:scale(1.03);}
.card-m__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.card-m__title{font-size:17px;font-weight:700;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-m__title a{color:var(--text);}
.card-m__title a:hover{color:var(--primary);}
.card-m__desc{font-size:14.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card-m__meta{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:13px;color:#8794A6;padding-top:6px;}
.dot{width:3px;height:3px;border-radius:50%;background:#C6D0DD;}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;background:var(--primary-light);color:var(--primary);
}
.tag--accent{background:var(--accent-light);color:#C4591F;}

/* ===== Hero ===== */
.hero{position:relative;padding:60px 0 76px;background:#fff;border-bottom:1px solid var(--line);}
.hero__grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.hero h1{font-size:40px;margin-bottom:18px;}
.hero__lead{font-size:16.5px;color:#3A4658;line-height:1.85;max-width:660px;}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero__badges{display:flex;flex-wrap:wrap;gap:28px;margin-top:34px;padding-top:24px;border-top:1px solid var(--line);}
.hbadge strong{display:block;font-size:24px;font-weight:700;color:var(--primary);font-variant-numeric:tabular-nums;line-height:1.2;}
.hbadge span{font-size:13px;color:var(--muted);}
.hero__visual{position:relative;}
.hero__visual img{border-radius:var(--r);aspect-ratio:4/3;object-fit:cover;width:100%;box-shadow:var(--sh);}
.live-card{
  position:absolute;left:18px;right:18px;bottom:18px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(6px);
  border:1px solid var(--line-soft);border-radius:var(--r);padding:16px 18px;
  box-shadow:var(--sh-h);
}
.live-card__top{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--primary);}
.live-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);}
.countdown{display:flex;align-items:center;gap:6px;margin:10px 0 12px;font-variant-numeric:tabular-nums;}
.countdown span{
  min-width:44px;height:40px;border-radius:var(--r-sm);background:var(--primary-light);
  color:var(--primary-dark);font-size:19px;font-weight:700;display:grid;place-items:center;
}
.countdown em{font-style:normal;color:var(--muted);font-weight:700;}

/* ===== 痛点 ===== */
.pain-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r);
  padding:26px 22px;box-shadow:var(--sh);height:100%;transition:box-shadow .2s ease,transform .2s ease;
}
.pain-card:hover{box-shadow:var(--sh-h);transform:translateY(-2px);}
.pain-card__icon{
  width:44px;height:44px;border-radius:11px;background:var(--accent-light);color:#C4591F;
  display:grid;place-items:center;font-size:18px;margin-bottom:16px;
}
.pain-card h3{font-size:17px;margin-bottom:8px;}
.pain-card p{font-size:14.5px;color:var(--muted);line-height:1.7;}

/* ===== 解决方案 ===== */
.solution{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;}
.sol-list{display:flex;flex-direction:column;gap:20px;margin-top:26px;}
.sol-item{display:flex;gap:16px;}
.sol-item__num{
  flex:0 0 38px;height:38px;border-radius:50%;border:1.5px solid var(--primary);
  color:var(--primary);display:grid;place-items:center;font-weight:700;font-size:14px;
  font-variant-numeric:tabular-nums;background:#fff;
}
.sol-item h3{font-size:16.5px;margin-bottom:4px;}
.sol-item p{font-size:14.5px;color:var(--muted);line-height:1.7;}
.sol-visual img{border-radius:var(--r);width:100%;aspect-ratio:4/3;object-fit:cover;box-shadow:var(--sh);}

/* ===== 步骤 ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.step{
  position:relative;background:#fff;border:1px solid var(--line-soft);
  border-radius:var(--r);padding:26px 22px;box-shadow:var(--sh);
}
.step::after{
  content:"";position:absolute;top:44px;right:-24px;width:24px;
  border-top:1px dashed #BFD0E6;
}
.step:last-child::after{display:none;}
.step__num{
  width:40px;height:40px;border-radius:50%;border:1.5px solid var(--primary);
  color:var(--primary);display:grid;place-items:center;font-weight:700;font-size:14px;
  background:#fff;margin-bottom:14px;font-variant-numeric:tabular-nums;
}
.step h3{font-size:16.5px;margin-bottom:6px;}
.step p{font-size:14.5px;color:var(--muted);line-height:1.7;}

/* ===== 交替图文行 ===== */
.alt-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:36px 0;border-bottom:1px solid var(--line);}
.alt-row:last-child{border-bottom:0;padding-bottom:0;}
.alt-row:first-child{padding-top:0;}
.alt-row.reverse .alt-row__media{order:2;}
.alt-row__media img{border-radius:var(--r);width:100%;aspect-ratio:16/10;object-fit:cover;box-shadow:var(--sh);}
.alt-row__body h3{font-size:22px;margin-bottom:12px;}
.alt-row__body p{color:var(--muted);font-size:15.5px;max-width:560px;}
.alt-row__meta{margin-top:18px;display:flex;gap:10px;flex-wrap:wrap;}

/* ===== 数据带 ===== */
.metrics-band{background:var(--band);border-radius:var(--r);padding:44px 40px;}
.metrics-band__head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:28px;}
.metrics-band__head h2{font-size:24px;}
.metrics-band__head span{font-size:14px;color:var(--muted);}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.metric strong{display:block;font-size:38px;font-weight:700;color:var(--primary);line-height:1.1;font-variant-numeric:tabular-nums;}
.metric strong em{font-style:normal;font-size:18px;margin-left:2px;color:var(--primary-dark);}
.metric span{display:block;margin-top:8px;font-size:14px;color:var(--muted);}

/* ===== 引用卡 ===== */
.quote-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r);
  padding:28px 26px;box-shadow:var(--sh);height:100%;display:flex;flex-direction:column;gap:16px;
  transition:box-shadow .2s ease,transform .2s ease;
}
.quote-card:hover{box-shadow:var(--sh-h);transform:translateY(-2px);}
.quote-card__mark{font-size:30px;line-height:1;color:var(--accent);font-weight:700;}
.quote-card p{font-size:15px;color:#3A4658;line-height:1.8;}
.quote-card__foot{margin-top:auto;display:flex;align-items:center;gap:12px;padding-top:14px;border-top:1px solid var(--line);}
.avatar{
  width:40px;height:40px;flex:0 0 40px;border-radius:50%;background:var(--primary-light);
  color:var(--primary);display:grid;place-items:center;font-weight:700;font-size:14px;
}
.quote-card__name{font-size:14px;font-weight:600;}
.quote-card__role{font-size:12.5px;color:var(--muted);}

/* ===== 人群卡 ===== */
.person-card{overflow:hidden;}
.person-card .thumb--43{aspect-ratio:4/3;}
.person-card .card-m__body{padding:18px 20px 20px;gap:8px;}

/* ===== 能力矩阵 ===== */
.matrix{display:grid;grid-template-columns:320px 1fr;gap:48px;align-items:start;}
.matrix__head h2{font-size:26px;margin-bottom:14px;}
.matrix__head p{color:var(--muted);font-size:15px;}
.matrix__rows{border-top:1px solid var(--line);}
.matrix__row{
  display:grid;grid-template-columns:150px 1fr auto;gap:20px;align-items:center;
  padding:20px 8px;border-bottom:1px solid var(--line);transition:background .2s ease;
}
.matrix__row:hover{background:#F3F7FC;}
.matrix__name{font-size:15.5px;font-weight:700;color:var(--primary-dark);}
.matrix__desc{font-size:14.5px;color:var(--muted);line-height:1.7;}

/* ===== 对照表 ===== */
.table-scroll{overflow-x:auto;border-radius:var(--r);border:1px solid var(--line-soft);background:#fff;box-shadow:var(--sh);}
table.cmp{width:100%;min-width:760px;border-collapse:collapse;font-size:15px;}
table.cmp th,table.cmp td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line);}
table.cmp thead th{background:var(--primary-light);color:var(--primary-dark);font-weight:700;font-size:15px;}
table.cmp tbody tr:last-child td{border-bottom:0;}
table.cmp tbody tr:hover{background:#F3F7FC;}
table.cmp td:first-child{font-weight:600;color:var(--text);}
table.cmp td{color:var(--muted);}
table.cmp td .yes{color:var(--primary);font-weight:600;}
table.cmp td .no{color:#9AA6B5;}

/* ===== 指标面板 ===== */
.stat-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r);
  padding:22px;box-shadow:var(--sh);height:100%;
}
.stat-card__top{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:14px;}
.stat-card__top span{font-size:14px;color:var(--muted);}
.stat-card__top strong{font-size:22px;color:var(--primary);font-variant-numeric:tabular-nums;}
.bar{height:8px;border-radius:999px;background:var(--line);overflow:hidden;}
.bar i{display:block;height:100%;border-radius:999px;background:var(--primary);}
.bar i.accent{background:var(--accent);}

/* ===== 保障条 ===== */
.assure{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.assure-item{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r);
  padding:24px 22px;box-shadow:var(--sh);display:flex;gap:14px;align-items:flex-start;
}
.assure-item i{font-size:19px;color:var(--accent);margin-top:2px;}
.assure-item h3{font-size:16px;margin-bottom:6px;}
.assure-item p{font-size:14px;color:var(--muted);line-height:1.7;}

/* ===== FAQ ===== */
.faq-acc{border-radius:var(--r);overflow:hidden;border:1px solid var(--line-soft);box-shadow:var(--sh);background:#fff;}
.faq-acc .accordion-item{border:0;border-bottom:1px solid var(--line);background:#fff;}
.faq-acc .accordion-item:last-child{border-bottom:0;}
.faq-acc .accordion-button{
  background:#fff;color:var(--text);font-size:16.5px;font-weight:600;
  padding:20px 22px;box-shadow:none;gap:14px;display:flex;align-items:center;
}
.faq-acc .accordion-button:not(.collapsed){
  background:var(--primary-light);color:var(--primary-dark);
  box-shadow:inset 3px 0 0 var(--accent);
}
.faq-acc .accordion-button:focus{box-shadow:none;border-color:transparent;}
.faq-acc .accordion-button::after{
  width:14px;height:14px;background-size:14px;flex:0 0 14px;margin-left:auto;
}
.faq-num{
  font-size:13px;font-weight:700;color:var(--primary);background:#fff;
  border:1px solid #C9DAEE;border-radius:6px;padding:2px 8px;font-variant-numeric:tabular-nums;
}
.faq-acc .accordion-body{padding:4px 22px 22px 66px;color:var(--muted);font-size:15px;line-height:1.85;}

/* ===== 结尾 CTA ===== */
.cta-band{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r);
  box-shadow:var(--sh);padding:44px 44px;display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
}
.cta-band h2{font-size:26px;margin-bottom:12px;}
.cta-band p{color:var(--muted);font-size:15px;}
.cta-form{display:flex;gap:12px;}
.cta-form input{
  flex:1 1 auto;height:48px;padding:0 16px;border-radius:var(--r-sm);
  border:1px solid #D3DFEC;background:#fff;color:var(--text);font-size:15px;
  transition:border-color .2s ease;
}
.cta-form input::placeholder{color:#9AA6B5;}
.cta-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(29,78,137,.1);}
.cta-form .m-btn{height:48px;}
.cta-note{margin-top:12px;font-size:13px;color:#8794A6;}

/* ===== 页脚 ===== */
.site-footer{background:var(--band);border-top:1px solid var(--line);padding:56px 0 0;margin-top:auto;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text);}
.footer-col p{font-size:14px;color:var(--muted);line-height:1.8;max-width:320px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--muted);}
.footer-links a:hover{color:var(--primary);}
.footer-bottom{
  border-top:1px solid #DCE5EF;padding:20px 0;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13px;color:#8794A6;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}

/* ===== 抽屉 ===== */
.offcanvas.drawer{width:290px;background:#fff;}
.drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px;}
.drawer .offcanvas-body{padding:20px;display:flex;flex-direction:column;gap:20px;}
.drawer .nav-link.is-active::before{left:-20px;}

/* ===== 响应式 ===== */
@media (max-width:1199px){
  :root{--nav-w:84px;}
  .side-nav{padding:20px 12px;align-items:center;}
  .brand{padding:0;justify-content:center;}
  .brand__text,.nav-group__title,.nav-link span,.side-cta p,.side-cta .m-btn span{display:none;}
  .nav-link{justify-content:center;padding:12px 0;width:52px;}
  .nav-link.is-active::before{left:-12px;}
  .side-cta{padding:10px;background:transparent;}
  .side-cta .m-btn{width:52px;padding:0;height:44px;}
  .solution{gap:36px;}
  .matrix{grid-template-columns:260px 1fr;gap:36px;}
  .hero__grid{gap:36px;}
  .cta-band{padding:36px;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:991px){
  :root{--nav-w:0px;}
  .side-nav{display:none;}
  .topbar{display:flex;}
  .content{margin-left:0;padding-top:60px;}
  .section{padding:56px 0;}
  .hero{padding:44px 0 56px;}
  .hero__grid{grid-template-columns:1fr;gap:32px;}
  h1,.hero h1{font-size:32px;}
  h2,.sec-head h2{font-size:24px;}
  .grid-3,.grid-4,.metrics-grid,.assure{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .step::after{display:none;}
  .solution{grid-template-columns:1fr;}
  .alt-row{grid-template-columns:1fr;gap:24px;}
  .alt-row.reverse .alt-row__media{order:0;}
  .matrix{grid-template-columns:1fr;gap:24px;}
  .cta-band{grid-template-columns:1fr;gap:24px;padding:32px;}
  .metrics-band{padding:32px 24px;}
  .fab,.about,.footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .wrap{padding:0 20px;}
  .section{padding:40px 0;}
  h1,.hero h1{font-size:26px;letter-spacing:-.2px;}
  h2,.sec-head h2{font-size:21px;}
  h3{font-size:17px;}
  .hero{padding:32px 0 40px;}
  .hero__lead{font-size:15.5px;}
  .hero__badges{gap:18px;margin-top:26px;padding-top:20px;}
  .hbadge strong{font-size:20px;}
  .grid,.grid-2,.grid-3,.grid-4,.metrics-grid,.assure,.steps{grid-template-columns:1fr;gap:16px;}
  .metrics-band__head h2{font-size:20px;}
  .metric strong{font-size:30px;}
  .matrix__row{grid-template-columns:1fr;gap:8px;padding:16px 4px;}
  .faq-acc .accordion-body{padding:4px 18px 20px 18px;}
  .faq-acc .accordion-button{padding:16px 18px;font-size:15.5px;gap:10px;}
  .cta-form{flex-direction:column;}
  .cta-form .m-btn{width:100%;}
  .cta-band{padding:26px 20px;}
  .live-card{position:static;margin-top:-40px;margin-left:14px;margin-right:14px;}
  .countdown span{min-width:38px;height:36px;font-size:17px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .alt-row{padding:24px 0;}
  .alt-row__body h3{font-size:19px;}
}
@media (max-width:520px){
  .hero__actions{flex-direction:column;align-items:stretch;}
  .hero__actions .m-btn{width:100%;}
  .faq-num{display:none;}
}

/* roulang page: category1 */
:root{
 --bg:#F6F8FB;
 --panel:#FFFFFF;
 --band:#EDF2F9;
 --primary:#1D4E89;
 --primary-dark:#163C69;
 --primary-light:#E8EFF8;
 --accent:#F0864A;
 --accent-light:#FDEBE0;
 --text:#1B2430;
 --muted:#5B6675;
 --line:#E4EAF2;
 --line-soft:#E7EDF5;
 --r:12px;
 --r-sm:8px;
 --sh:0 6px 20px rgba(23,60,105,.07);
 --sh-h:0 12px 28px rgba(23,60,105,.12);
 --nav-w:248px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
 margin:0;font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
 font-size:16px;line-height:1.75;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent);}
img{display:block;max-width:100%;height:auto;}
button,input,select{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--text);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
::selection{background:var(--primary-light);}

/* ============ 布局骨架 ============ */
.wrap{max-width:1280px;margin:0 auto;padding:0 28px;}
.page{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column;}
main{flex:1 1 auto;}
.section{padding:64px 0;}
.section--band{background:var(--band);}
.section--white{background:#fff;}
.sec-head{margin-bottom:28px;max-width:820px;}
.sec-head h2{font-size:28px;letter-spacing:-.01em;}
.sec-head p{margin-top:10px;color:var(--muted);font-size:15px;line-height:1.8;}
.sec-head--tight{margin-bottom:20px;}

/* ============ 侧栏 ============ */
.side-nav{
 position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
 background:#fff;border-right:1px solid var(--line);
 padding:22px 16px;display:flex;flex-direction:column;gap:22px;
 overflow-y:auto;z-index:1040;
}
.brand{display:flex;align-items:center;gap:11px;padding:2px 4px;color:var(--text);}
.brand:hover{color:var(--text);}
.brand__mark{
 width:38px;height:38px;flex:0 0 38px;border-radius:10px;
 background:var(--primary);color:#fff;display:grid;place-items:center;
 font-weight:700;font-size:15px;letter-spacing:.5px;
}
.brand__text{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.brand__name{font-weight:700;font-size:15px;white-space:nowrap;color:var(--text);}
.brand__sub{font-size:12px;color:var(--muted);white-space:nowrap;}
.nav-group__title{font-size:12px;letter-spacing:.08em;color:#8794A6;padding:0 10px;margin-bottom:8px;font-weight:600;}
.nav-list{display:flex;flex-direction:column;gap:2px;}
.nav-link{
 display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--r-sm);
 color:#3A4658;font-size:14.5px;font-weight:500;position:relative;
 transition:background .2s ease,color .2s ease;white-space:nowrap;
}
.nav-link i{width:18px;text-align:center;font-size:14px;opacity:.85;}
.nav-link:hover{background:#F3F7FC;color:var(--primary);}
.nav-link.is-active{background:var(--primary-light);color:var(--primary);font-weight:700;}
.nav-link.is-active::before{
 content:"";position:absolute;left:-16px;top:7px;bottom:7px;width:3px;
 border-radius:0 3px 3px 0;background:var(--accent);
}
.side-cta{margin-top:auto;background:var(--primary-light);border-radius:var(--r);padding:16px;}
.side-cta p{font-size:13px;line-height:1.6;color:#3A4658;margin-bottom:10px;}
.m-btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 height:44px;padding:0 22px;border-radius:var(--r-sm);font-size:15px;font-weight:500;
 border:1px solid transparent;cursor:pointer;transition:all .2s ease;
 text-align:center;line-height:1;white-space:nowrap;
}
.m-btn--primary{background:var(--primary);color:#fff;}
.m-btn--primary:hover{background:var(--accent);color:#fff;transform:translateY(-1px);}
.m-btn--outline{background:#fff;color:var(--primary);border-color:#C9DAEE;}
.m-btn--outline:hover{background:var(--primary-light);border-color:var(--primary);color:var(--primary-dark);transform:translateY(-1px);}
.m-btn--sm{height:38px;padding:0 18px;font-size:14px;}
.side-cta .m-btn{width:100%;height:40px;font-size:14px;}

/* ============ 顶部移动栏 ============ */
.topbar{
 display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:1050;
 background:#fff;border-bottom:1px solid var(--line);
 align-items:center;justify-content:space-between;padding:0 18px;
}
.topbar .brand__mark{width:32px;height:32px;flex:0 0 32px;border-radius:9px;font-size:13px;}
.topbar .brand__sub{display:none;}
.menu-btn{
 width:40px;height:40px;border-radius:var(--r-sm);border:1px solid var(--line);
 background:#fff;color:var(--primary);display:grid;place-items:center;cursor:pointer;transition:.2s;
}
.menu-btn:hover{background:var(--primary-light);border-color:#C9DAEE;}
.offcanvas.m-drawer{width:284px;max-width:82vw;background:#fff;border-right:1px solid var(--line);padding:20px 16px;}
.m-drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.m-drawer__close{width:36px;height:36px;border-radius:var(--r-sm);border:1px solid var(--line);background:#fff;color:var(--muted);display:grid;place-items:center;cursor:pointer;}
.m-drawer__close:hover{color:var(--primary);border-color:#C9DAEE;background:var(--primary-light);}

/* ============ 分类标题带 ============ */
.cat-head{background:#fff;border-bottom:1px solid var(--line);padding:38px 0 32px;}
.crumb{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--muted);margin-bottom:16px;flex-wrap:wrap;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--primary);}
.crumb i{font-size:10px;opacity:.6;}
.cat-head__grid{display:grid;grid-template-columns:1fr auto;gap:36px;align-items:end;}
.cat-head h1{font-size:34px;letter-spacing:-.015em;}
.cat-head__lead{margin-top:14px;font-size:15.5px;line-height:1.85;color:#3A4658;max-width:780px;}
.cat-stat{
 background:var(--primary-light);border-radius:var(--r);padding:18px 22px;min-width:250px;
 display:flex;flex-direction:column;gap:12px;
}
.cat-stat__row{display:flex;align-items:baseline;justify-content:space-between;gap:20px;font-size:13.5px;color:#3A4658;}
.cat-stat__row strong{font-size:21px;color:var(--primary);font-variant-numeric:tabular-nums;font-weight:700;line-height:1.2;}

/* ============ 筛选条 ============ */
.filter-bar{
 background:#fff;border:1px solid var(--line-soft);border-radius:var(--r);box-shadow:var(--sh);
 padding:16px 20px;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
}
.chips{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
 height:34px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:#fff;
 color:#3A4658;font-size:13.5px;display:inline-flex;align-items:center;gap:6px;cursor:pointer;transition:.2s;
}
.chip:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light);}
.chip.is-on{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600;}
.sort-wrap{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--muted);}
.sort-select{
 height:36px;border:1px solid var(--line);border-radius:var(--r-sm);padding:0 34px 0 12px;
 color:#3A4658;background:#fff;appearance:none;cursor:pointer;
 background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%235B6675' stroke-width='1.5'/%3E%3C/svg%3E");
 background-repeat:no-repeat;background-position:right 12px center;background-size:12px;
 transition:.2s;
}
.sort-select:hover,.sort-select:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px rgba(29,78,137,.1);}

/* ============ 条目列表 ============ */
.entry-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.entry-card{
 background:#fff;border:1px solid var(--line-soft);border-radius:var(--r);overflow:hidden;
 box-shadow:var(--sh);display:flex;flex-direction:column;
 transition:box-shadow .2s ease,transform .2s ease;
}
.entry-card:hover{box-shadow:var(--sh-h);transform:translateY(-2px);}
.entry-card__thumb{aspect-ratio:16/9;background:var(--band);overflow:hidden;}
.entry-card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.entry-card:hover .entry-card__thumb img{transform:scale(1.04);}
.entry-card__body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.entry-card__title{
 font-size:17px;font-weight:700;line-height:1.5;
 display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.entry-card__title a{color:var(--text);}
.entry-card__title a:hover{color:var(--primary);}
.entry-card__desc{
 font-size:14.5px;color:var(--muted);line-height:1.72;
 display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.entry-card__meta{
 margin-top:auto;padding-top:8px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;
 font-size:13px;color:#8794A6;
}
.tag{
 display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
 font-size:12px;font-weight:600;background:var(--primary-light);color:var(--primary);
}
.tag--accent{background:var(--accent-light);color:#C4591F;}
.more-row{display:flex;justify-content:center;margin-top:34px;}
.more-link{
 display:inline-flex;align-items:center;gap:9px;height:46px;padding:0 26px;
 border-radius:var(--r-sm);border:1px solid #C9DAEE;background:#fff;
 color:var(--primary);font-weight:600;font-size:15px;transition:.2s;
}
.more-link:hover{background:var(--primary-light);border-color:var(--primary);color:var(--primary-dark);transform:translateY(-1px);}

/* ============ 分类入口 ============ */
.cat-entries{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.cat-entry{
 display:flex;flex-direction:column;gap:12px;background:#fff;
 border:1px solid var(--line-soft);border-radius:var(--r);box-shadow:var(--sh);
 padding:22px;transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.cat-entry:hover{box-shadow:var(--sh-h);transform:translateY(-2px);border-color:#C9DAEE;}
.cat-entry__icon{
 width:40px;height:40px;border-radius:10px;background:var(--primary-light);color:var(--primary);
 display:grid;place-items:center;font-size:16px;
}
.cat-entry.is-current .cat-entry__icon{background:var(--accent-light);color:#C4591F;}
.cat-entry strong{font-size:15.5px;color:var(--text);}
.cat-entry span{font-size:13.5px;color:var(--muted);line-height:1.65;}

/* ============ 数据概览 ============ */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.metric{
 background:#fff;border:1px solid var(--line-soft);border-radius:var(--r);
 box-shadow:var(--sh);padding:20px 22px;
}
.metric__label{font-size:13.5px;color:var(--muted);}
.metric__num{
 font-size:28px;font-weight:700;color:var(--primary);line-height:1.2;
 margin:6px 0 12px;font-variant-numeric:tabular-nums;
}
.metric__num small{font-size:13px;font-weight:500;color:var(--muted);margin-left:4px;}
.bar{height:6px;border-radius:999px;background:var(--line);overflow:hidden;}
.bar > i{display:block;height:100%;border-radius:999px;background:var(--primary);}
.bar--accent > i{background:var(--accent);}

/* ============ 精选横卡 ============ */
.feature-list{display:flex;flex-direction:column;gap:22px;}
.feature{
 display:grid;grid-template-columns:320px 1fr;background:#fff;
 border:1px solid var(--line-soft);border-radius:var(--r);overflow:hidden;
 box-shadow:var(--sh);transition:box-shadow .2s ease,transform .2s ease;
}
.feature:hover{box-shadow:var(--sh-h);transform:translateY(-2px);}
.feature__thumb{aspect-ratio:4/3;background:var(--band);overflow:hidden;}
.feature__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.feature:hover .feature__thumb img{transform:scale(1.04);}
.feature__body{padding:26px 28px;display:flex;flex-direction:column;gap:12px;}
.feature__body h3{font-size:19px;}
.feature__body h3 a{color:var(--text);}
.feature__body h3 a:hover{color:var(--primary);}
.feature__body p{font-size:14.5px;color:var(--muted);line-height:1.75;}
.feature__meta{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:13px;color:#8794A6;padding-top:6px;flex-wrap:wrap;}

/* ============ 延伸阅读 ============ */
.reading-list{background:#fff;border:1px solid var(--line-soft);border-radius:var(--r);box-shadow:var(--sh);padding:6px 24px;}
.reading-list li + li{border-top:1px solid var(--line);}
.reading-list a{
 display:flex;align-items:center;justify-content:space-between;gap:20px;
 padding:17px 4px;color:var(--text);font-size:15px;font-weight:500;transition:.2s;border-radius:6px;
}
.reading-list a:hover{color:var(--primary);background:#F3F7FC;padding-left:10px;padding-right:10px;}
.reading-list a span{font-size:13px;color:#8794A6;flex:0 0 auto;}

/* ============ FAQ ============ */
.faq .accordion-item{
 border:1px solid var(--line-soft);border-radius:var(--r);overflow:hidden;
 margin-bottom:14px;background:#fff;box-shadow:var(--sh);
}
.faq .accordion-header{margin:0;background:transparent;}
.faq .accordion-button{
 display:flex;align-items:center;gap:14px;width:100%;
 background:#fff;color:var(--text);font-size:15.5px;font-weight:600;
 padding:20px 22px;box-shadow:none;border:0;transition:background .2s ease,color .2s ease;
}
.faq .accordion-button::before{
 content:attr(data-num);font-size:13px;font-weight:700;color:var(--accent);
 font-variant-numeric:tabular-nums;flex:0 0 auto;
}
.faq .accordion-button::after{
 background-image:none;content:"";width:10px;height:10px;flex:0 0 10px;
 border-right:2px solid var(--primary);border-bottom:2px solid var(--primary);
 transform:rotate(45deg);margin-left:auto;transition:transform .2s ease;
}
.faq .accordion-button:not(.collapsed){
 background:var(--primary-light);color:var(--primary-dark);
 box-shadow:inset 3px 0 0 var(--accent);
}
.faq .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);}
.faq .accordion-button:focus{box-shadow:inset 3px 0 0 var(--accent);outline:none;}
.faq .accordion-body{
 padding:6px 22px 22px 46px;font-size:14.5px;color:var(--muted);line-height:1.8;
}

/* ============ 结尾 CTA ============ */
.cta-strip{
 background:var(--primary-light);border:1px solid #CFDEEF;border-radius:var(--r);
 padding:32px 36px;display:flex;align-items:center;justify-content:space-between;
 gap:26px;flex-wrap:wrap;
}
.cta-strip__text h2{font-size:22px;color:var(--primary-dark);}
.cta-strip__text p{margin-top:8px;font-size:14.5px;color:#3A4658;line-height:1.7;max-width:660px;}
.cta-strip__actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:auto;}
.footer-grid{
 display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;
 padding:52px 0 36px;
}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px;}
.footer-col h4{font-size:14.5px;margin-bottom:14px;color:var(--text);}
.footer-col p{font-size:13.8px;color:var(--muted);line-height:1.8;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:13.8px;color:var(--muted);}
.footer-links a:hover{color:var(--primary);}
.footer-bottom{
 border-top:1px solid var(--line);padding:18px 0 26px;
 display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
 font-size:13px;color:#8794A6;
}

/* ============ 响应式：中屏 ============ */
@media (max-width:1199.98px) and (min-width:992px){
 :root{--nav-w:84px;}
 .side-nav{padding:20px 12px;align-items:center;}
 .brand{justify-content:center;padding:0;}
 .brand__text{display:none;}
 .nav-group{width:100%;}
 .nav-group__title{display:none;}
 .nav-link{justify-content:center;padding:12px 0;}
 .nav-link span{display:none;}
 .nav-link.is-active::before{left:-12px;}
 .side-cta{display:none;}
 .cat-head__grid{gap:24px;}
 .cat-stat{min-width:216px;}
 .entry-grid{gap:20px;}
}

/* ============ 响应式：移动 ============ */
@media (max-width:991.98px){
 :root{--nav-w:0px;}
 .side-nav{display:none;}
 .topbar{display:flex;}
 .page{margin-left:0;padding-top:60px;}
 .wrap{padding:0 18px;}
 .section{padding:44px 0;}
 .cat-head{padding:26px 0 24px;}
 .cat-head h1{font-size:26px;}
 .cat-head__grid{grid-template-columns:1fr;align-items:start;gap:20px;}
 .cat-stat{min-width:0;width:100%;flex-direction:row;flex-wrap:wrap;gap:14px 28px;padding:16px 18px;}
 .cat-stat__row{flex-direction:column;align-items:flex-start;gap:2px;}
 .sec-head h2{font-size:23px;}
 .entry-grid{grid-template-columns:1fr;gap:18px;}
 .cat-entries{grid-template-columns:repeat(2,1fr);gap:16px;}
 .metric-grid{grid-template-columns:repeat(2,1fr);gap:16px;}
 .feature{grid-template-columns:1fr;}
 .feature__thumb{aspect-ratio:16/9;}
 .feature__body{padding:20px;}
 .cta-strip{padding:24px 20px;}
 .reading-list{padding:4px 18px;}
 .reading-list a{font-size:14.5px;padding:15px 2px;}
 .footer-grid{grid-template-columns:1fr 1fr;gap:26px;padding:38px 0 26px;}
 .filter-bar{padding:14px 16px;}
}

@media (max-width:520px){
 .brand__name{font-size:14.5px;}
 .cat-head h1{font-size:22px;}
 .cat-head__lead{font-size:14.5px;}
 .entry-card__body{padding:16px 16px 18px;}
 .cat-entries{grid-template-columns:1fr;}
 .metric-grid{grid-template-columns:1fr 1fr;}
 .metric{padding:16px 16px;}
 .metric__num{font-size:23px;}
 .footer-grid{grid-template-columns:1fr;}
 .cta-strip__actions{width:100%;}
 .cta-strip__actions .m-btn{flex:1 1 auto;}
 .sort-wrap{width:100%;justify-content:space-between;}
 .chips{gap:8px;}
 .chip{height:32px;padding:0 13px;font-size:13px;}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}