/* roulang page: index */
:root{
  --brand:#1450B4;
  --brand-light:#2A73E8;
  --brand-soft:#EDF3FC;
  --brand-deep:#0D2C5E;
  --accent:#F26B21;
  --teal:#12A594;
  --danger:#D9433F;
  --page:#F7FAFE;
  --card:#FFFFFF;
  --text:#10233F;
  --text-2:#5C6E88;
  --text-3:#8A98AD;
  --line:#E2EAF5;
  --r-btn:10px;
  --r-card:16px;
  --r-lg:24px;
  --sh-1:0 6px 20px rgba(13,44,94,.06);
  --sh-2:0 14px 32px rgba(13,44,94,.10);
  --sh-3:0 20px 44px rgba(13,44,94,.12);
  --ease:cubic-bezier(.2,.7,.3,1);

  --bs-primary:#1450B4;
  --bs-body-color:#10233F;
  --bs-body-bg:#F7FAFE;
  --bs-border-color:#E2EAF5;
  --bs-border-radius:16px;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  --bs-link-color:#1450B4;
  --bs-link-hover-color:#F26B21;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;
  font-family:var(--bs-font-sans-serif);
  font-size:16px;line-height:1.85;color:var(--text);
  background:var(--page);
  font-variant-numeric:tabular-nums lining-nums;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;transition:color .2s var(--ease);}
a:hover{color:var(--accent);}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);letter-spacing:-.01em;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
::selection{background:rgba(42,115,232,.18);}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.container{max-width:1200px;padding-left:32px;padding-right:32px;}
@media (min-width:1400px){.container{max-width:1280px;}}
section{position:relative;}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1040;
  background:rgba(255,255,255,.14);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid rgba(255,255,255,.28);
  box-shadow:0 8px 24px rgba(13,44,94,.10);
  transition:background .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.site-header.is-stuck{
  background:rgba(255,255,255,.94);
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px rgba(13,44,94,.12);
}
.nav-inner{
  height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto;}
.brand:hover{text-decoration:none;}
.brand-mark{width:28px;height:28px;flex:0 0 28px;color:#fff;transition:color .24s var(--ease);}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:17px;font-weight:700;color:#fff;letter-spacing:.01em;transition:color .24s var(--ease);}
.brand-sub{font-size:11px;font-weight:500;color:rgba(255,255,255,.72);letter-spacing:.16em;transition:color .24s var(--ease);}
.site-header.is-stuck .brand-mark,
.site-header.is-stuck .brand-name{color:var(--brand-deep);}
.site-header.is-stuck .brand-sub{color:var(--text-3);}

.main-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto;justify-content:center;}
.main-nav a{
  position:relative;display:inline-block;padding:8px 14px;border-radius:999px;
  font-size:15px;font-weight:500;color:rgba(255,255,255,.9);text-decoration:none;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.16);}
.main-nav a.active{color:#fff;background:rgba(255,255,255,.20);}
.main-nav a.active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:2px;
  width:20px;height:2px;border-radius:2px;background:var(--accent);
}
.site-header.is-stuck .main-nav a{color:var(--text-2);}
.site-header.is-stuck .main-nav a:hover{color:var(--brand);background:var(--brand-soft);}
.site-header.is-stuck .main-nav a.active{color:var(--brand);background:var(--brand-soft);}

.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:999px;border:1px solid rgba(255,255,255,.34);background:rgba(255,255,255,.12);
  color:#fff;cursor:pointer;transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.icon-btn:hover{background:rgba(255,255,255,.24);transform:translateY(-1px);}
.site-header.is-stuck .icon-btn{border-color:var(--line);background:#fff;color:var(--brand-deep);}
.site-header.is-stuck .icon-btn:hover{border-color:rgba(20,80,180,.3);color:var(--brand);}

.btn-cta{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);border:none;
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  transition:background .2s var(--ease),transform .18s var(--ease),box-shadow .2s var(--ease);
}
.btn-cta:hover{background:#DE5C15;color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(242,107,33,.28);text-decoration:none;}
.btn-cta:active{transform:translateY(1px);box-shadow:none;}
.site-header .btn-cta{height:42px;padding:0 20px;font-size:14px;}

.burger{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid rgba(255,255,255,.34);
  background:rgba(255,255,255,.12);cursor:pointer;padding:0;align-items:center;justify-content:center;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:#fff;position:relative;transition:background .2s var(--ease);}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:#fff;transition:transform .24s var(--ease);}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}
.site-header.is-stuck .burger{border-color:var(--line);background:#fff;}
.site-header.is-stuck .burger span,
.site-header.is-stuck .burger span::before,
.site-header.is-stuck .burger span::after{background:var(--brand-deep);}

.drawer{
  position:fixed;inset:0;z-index:1050;background:#fff;
  border-bottom-left-radius:24px;border-bottom-right-radius:24px;
  padding:88px 24px 28px;display:flex;flex-direction:column;gap:4px;
  transform:translateY(-102%);transition:transform .32s var(--ease);
  box-shadow:0 24px 60px rgba(13,44,94,.18);
}
.drawer.open{transform:translateY(0);}
.drawer a.drawer-link{
  display:flex;align-items:center;height:56px;font-size:18px;font-weight:600;
  color:var(--text);text-decoration:none;border-bottom:1px solid var(--line);
}
.drawer a.drawer-link.active{color:var(--brand);}
.drawer .btn-cta{margin-top:20px;width:100%;height:48px;}
.drawer-close{
  position:absolute;top:20px;right:20px;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);background:#fff;color:var(--brand-deep);font-size:20px;line-height:1;cursor:pointer;
}

/* ============ Hero ============ */
.hero{
  position:relative;min-height:88vh;display:flex;align-items:center;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  padding:150px 0 140px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(13,44,94,.88) 0%,rgba(13,44,94,.62) 46%,rgba(13,44,94,.24) 100%);
}
.hero::after{
  content:"";position:absolute;right:0;bottom:0;width:46%;height:192px;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:36px 36px;opacity:.06;pointer-events:none;
}
.hero .container{position:relative;z-index:2;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 16px;border-radius:999px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);
  color:#fff;font-size:13px;font-weight:500;letter-spacing:.04em;margin-bottom:24px;
}
.hero h1{
  font-size:clamp(30px,4.6vw,52px);line-height:1.22;letter-spacing:-.02em;
  color:#fff;margin-bottom:20px;text-shadow:0 2px 18px rgba(9,26,56,.35);
}
.hero h1 em{font-style:normal;color:#FFD9BF;}
.hero-sub{
  font-size:17px;line-height:1.75;color:rgba(255,255,255,.86);
  max-width:520px;margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px;}
.btn-primary-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 28px;border-radius:var(--r-btn);border:none;
  background:var(--accent);color:#fff;font-size:16px;font-weight:600;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  transition:background .2s var(--ease),transform .18s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary-x:hover{background:#DE5C15;color:#fff;transform:translateY(-1px);box-shadow:0 14px 28px rgba(242,107,33,.3);text-decoration:none;}
.btn-primary-x:active{transform:translateY(1px);box-shadow:none;}
.btn-glass{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 26px;border-radius:var(--r-btn);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.5);color:#fff;
  font-size:16px;font-weight:600;text-decoration:none;cursor:pointer;
  transition:background .2s var(--ease),transform .18s var(--ease);
}
.btn-glass:hover{background:rgba(255,255,255,.26);color:#fff;transform:translateY(-1px);text-decoration:none;}
.hero-trust{display:flex;flex-wrap:wrap;gap:26px;}
.hero-trust span{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.85);}
.hero-trust svg{width:17px;height:17px;flex:0 0 17px;color:#7FD8C9;}
.hero-float{
  position:absolute;right:32px;bottom:132px;z-index:3;
  width:262px;padding:22px 24px;border-radius:20px;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.34);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  box-shadow:0 20px 44px rgba(9,26,56,.22);
}
.hero-float .hf-item + .hf-item{margin-top:16px;padding-top:16px;border-top:1px solid rgba(255,255,255,.24);}
.hero-float .hf-num{font-size:30px;font-weight:700;color:#fff;line-height:1.2;}
.hero-float .hf-num small{font-size:13px;font-weight:500;color:rgba(255,255,255,.72);margin-left:4px;}
.hero-float .hf-label{font-size:13px;color:rgba(255,255,255,.78);}

/* ============ 指标看板 ============ */
.metrics-wrap{margin-top:-72px;position:relative;z-index:5;}
.metrics-card{
  background:var(--card);border-radius:var(--r-lg);border:1px solid var(--line);
  box-shadow:var(--sh-3);padding:12px 0;
}
.metric{padding:26px 28px;position:relative;}
.metric::before{
  content:"";position:absolute;top:0;left:28px;right:28px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-light));
}
.metric.alt::before{background:linear-gradient(90deg,var(--accent),#F9A46F);}
.metric-num{font-size:39px;font-weight:700;color:var(--brand);line-height:1.1;letter-spacing:-.02em;}
.metric.alt .metric-num{color:var(--accent);}
.metric-num small{font-size:14px;font-weight:500;color:var(--text-3);margin-left:5px;}
.metric-label{margin-top:8px;font-size:14px;color:var(--text-2);}
.metric-col{border-right:1px solid var(--line);}
.metric-col:last-child{border-right:none;}

/* ============ 板块通用 ============ */
.section{padding:96px 0;}
.section.soft{background:var(--brand-soft);}
.section.plain{background:#fff;}
.section-head{max-width:720px;margin-bottom:40px;}
.section-tag{
  display:inline-block;height:26px;line-height:26px;padding:0 14px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:500;margin-bottom:14px;
}
.section h2{
  font-size:clamp(24px,2.6vw,32px);line-height:1.3;margin-bottom:14px;position:relative;padding-left:18px;
}
.section h2::before{
  content:"";position:absolute;left:0;top:6px;width:4px;height:22px;border-radius:2px;background:var(--brand);
}
.section-lead{font-size:16px;color:var(--text-2);max-width:660px;}

/* ============ 服务矩阵 ============ */
.matrix-wide{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);overflow:hidden;height:100%;display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.matrix-wide:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(20,80,180,.3);}
.matrix-wide .mw-img{aspect-ratio:16/10;overflow:hidden;}
.matrix-wide .mw-img img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.matrix-wide .mw-body{padding:28px;}
.matrix-wide h3{font-size:20px;margin-bottom:12px;}
.matrix-wide p{font-size:15px;color:var(--text-2);margin-bottom:16px;}
.matrix-wide .mw-list li{
  position:relative;padding-left:18px;font-size:15px;color:var(--text-2);line-height:1.8;
}
.matrix-wide .mw-list li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--brand-light);
}
.arrow-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:18px;
  font-size:15px;font-weight:600;color:var(--brand);text-decoration:none;
}
.arrow-link:hover{color:var(--accent);text-decoration:none;}
.arrow-link svg{width:15px;height:15px;transition:transform .2s var(--ease);}
.arrow-link:hover svg{transform:translateX(4px);}

.mini-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:28px;height:100%;
  display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.mini-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(20,80,180,.3);}
.mini-icon{
  width:36px;height:36px;border-radius:10px;background:var(--brand-soft);
  display:flex;align-items:center;justify-content:center;color:var(--brand);margin-bottom:16px;
}
.mini-icon svg{width:19px;height:19px;}
.mini-card h3{font-size:17px;margin-bottom:8px;line-height:1.45;}
.mini-card p{font-size:15px;color:var(--text-2);margin:0;}
.mini-card.wide{grid-column:span 2;}

/* ============ 结果对比 ============ */
.compare-head{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:8px;
}
.compare-head .ch-side{flex:1 1 0;font-size:15px;font-weight:600;}
.compare-head .ch-side.left{color:var(--brand);text-align:right;padding-right:16px;}
.compare-head .ch-side.right{color:var(--text-2);padding-left:16px;}
.compare-head .ch-mid{width:180px;flex:0 0 180px;text-align:center;font-size:13px;color:var(--text-3);}
.cmp-row{
  display:grid;grid-template-columns:1fr 180px 1fr;align-items:center;
  padding:18px 0;border-bottom:1px dashed var(--line);
}
.cmp-row:last-child{border-bottom:none;}
.cmp-side{display:flex;flex-direction:column;gap:8px;}
.cmp-side.left{align-items:flex-end;}
.cmp-side.right{align-items:flex-start;}
.cmp-bar{width:100%;height:8px;border-radius:999px;background:var(--line);overflow:hidden;}
.cmp-bar i{display:block;height:100%;border-radius:999px;}
.cmp-side.left .cmp-bar i{background:linear-gradient(90deg,var(--brand-light),var(--brand));margin-left:auto;}
.cmp-side.right .cmp-bar i{background:#C7D3E4;}
.cmp-val{font-size:14px;color:var(--text-2);}
.cmp-side.left .cmp-val{color:var(--brand);font-weight:600;}
.cmp-name{
  text-align:center;font-size:15px;font-weight:600;color:var(--text);
  padding:0 12px;position:relative;
}
.cmp-name::before,.cmp-name::after{
  content:"";position:absolute;top:-8px;bottom:-8px;width:1px;
  background-image:linear-gradient(to bottom,var(--line) 50%,transparent 50%);
  background-size:1px 8px;
}
.cmp-name::before{left:0;}
.cmp-name::after{right:0;}

/* ============ 资讯列表 ============ */
.post-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;height:100%;display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(20,80,180,.3);}
.post-thumb{aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,#EDF3FC,#DCE7F7);}
.post-thumb img{width:100%;height:100%;object-fit:cover;}
.post-body{padding:24px 26px 26px;display:flex;flex-direction:column;flex:1 1 auto;}
.post-cat{
  display:inline-block;height:26px;line-height:26px;padding:0 14px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:500;
  align-self:flex-start;margin-bottom:14px;
}
.post-title{
  font-size:18px;line-height:1.45;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-title a{color:var(--text);text-decoration:none;}
.post-title a:hover{color:var(--brand);}
.post-sum{
  font-size:15px;color:var(--text-2);margin-bottom:18px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:16px;border-top:1px solid var(--line);font-size:14px;color:var(--text-3);
}
.post-foot a{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;text-decoration:none;font-size:14px;}
.post-foot a:hover{color:var(--accent);}
.post-foot a svg{width:14px;height:14px;}
.empty-state{
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-card);
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;padding:36px;
}
.empty-state svg{width:40px;height:40px;color:var(--brand-light);}
.empty-state p{margin:0;color:var(--text-2);font-size:15px;}
.btn-outline-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  background:transparent;border:1px solid var(--brand);color:var(--brand);
  font-size:15px;font-weight:600;text-decoration:none;cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),transform .18s var(--ease);
}
.btn-outline-x:hover{background:rgba(20,80,180,.08);color:var(--brand);transform:translateY(-1px);text-decoration:none;}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:0 auto;}
.accordion-item{background:transparent;border:none;border-top:1px solid var(--line);}
.accordion-item:last-child{border-bottom:1px solid var(--line);}
.accordion-button{
  background:transparent !important;box-shadow:none !important;border-radius:0 !important;
  font-size:17px;font-weight:600;color:var(--text);
  padding:22px 40px 22px 0;line-height:1.6;
  --plus:#10233F;
}
.accordion-button:not(.collapsed){color:var(--brand);}
.accordion-button:focus{box-shadow:none;outline:2px solid var(--brand);outline-offset:-2px;}
.accordion-button::after{
  flex:0 0 16px;width:16px;height:16px;
  background-image:linear-gradient(var(--plus),var(--plus)),linear-gradient(var(--plus),var(--plus)) !important;
  background-size:16px 1.5px,1.5px 16px !important;
  background-position:center !important;
  background-repeat:no-repeat !important;
  transition:transform .24s var(--ease);
}
.accordion-button:not(.collapsed)::after{--plus:#F26B21;transform:rotate(45deg);}
.accordion-body{
  padding:0 40px 24px 0;font-size:15px;line-height:1.85;color:var(--text-2);
}
.accordion-body p:last-child{margin-bottom:0;}

/* ============ 表单 ============ */
.form-panel{
  background:#fff;border:1px solid var(--line);border-radius:20px;
  box-shadow:var(--sh-3);padding:32px;
}
.form-info h2{font-size:clamp(22px,2.4vw,30px);line-height:1.35;margin-bottom:16px;padding-left:18px;position:relative;}
.form-info h2::before{content:"";position:absolute;left:0;top:6px;width:4px;height:22px;border-radius:2px;background:var(--brand);}
.form-info > p{font-size:15px;color:var(--text-2);margin-bottom:22px;}
.info-points li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-2);margin-bottom:14px;}
.info-points .dot{
  flex:0 0 24px;width:24px;height:24px;border-radius:8px;background:var(--brand-soft);
  display:flex;align-items:center;justify-content:center;color:var(--brand);
}
.info-points .dot svg{width:14px;height:14px;}
.contact-lines{margin-top:26px;padding-top:22px;border-top:1px solid var(--line);font-size:14px;color:var(--text-2);line-height:2;}
.form-label{font-size:14px;font-weight:600;color:var(--text);margin-bottom:8px;}
.form-control,.form-select{
  height:46px;border-radius:var(--r-btn);border:1px solid var(--line);background:#fff;
  font-size:15px;color:var(--text);box-shadow:none;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
textarea.form-control{height:auto;min-height:120px;padding-top:12px;line-height:1.7;}
.form-control::placeholder{color:var(--text-3);}
.form-control:focus,.form-select:focus{
  border-color:var(--brand);box-shadow:0 0 0 3px rgba(20,80,180,.18);outline:none;
}
.form-check-input{width:18px;height:18px;border-color:#C7D3E4;margin-top:3px;}
.form-check-input:checked{background-color:var(--brand);border-color:var(--brand);}
.form-check-input:focus{box-shadow:0 0 0 3px rgba(20,80,180,.18);border-color:var(--brand);}
.form-check-label{font-size:14px;color:var(--text-2);line-height:1.7;}
.form-note{font-size:13px;color:var(--text-3);margin-top:10px;}
.guard-row{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:20px;}
.guard-row span{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--text-2);}
.guard-row svg{width:15px;height:15px;color:var(--teal);}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-deep);color:#fff;padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{color:#fff;}
.footer-brand .brand-name{color:#fff;font-size:17px;font-weight:700;}
.footer-brand .brand-sub{color:rgba(255,255,255,.62);font-size:11px;letter-spacing:.16em;}
.footer-desc{font-size:14px;color:rgba(255,255,255,.66);line-height:1.9;margin:0;}
.footer-col h4{font-size:15px;font-weight:600;color:rgba(255,255,255,.8);margin-bottom:18px;}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a{
  font-size:14px;color:rgba(255,255,255,.66);text-decoration:none;
  transition:color .2s var(--ease),transform .2s var(--ease);display:inline-block;
}
.footer-col ul li a:hover{color:#fff;transform:translateX(2px);}
.footer-col p{font-size:14px;color:rgba(255,255,255,.66);line-height:2;margin:0;}
.footer-bottom{
  margin-top:56px;padding:24px 0;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:14px;color:rgba(255,255,255,.55);
}
.footer-bottom a{color:rgba(255,255,255,.55);text-decoration:none;}
.footer-bottom a:hover{color:#fff;}

.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:var(--brand);color:#fff;border:none;display:flex;align-items:center;justify-content:center;
  cursor:pointer;opacity:0;visibility:hidden;z-index:1030;
  box-shadow:0 12px 26px rgba(13,44,94,.28);
  transition:opacity .24s var(--ease),visibility .24s var(--ease),transform .2s var(--ease),background .2s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;}
.to-top:hover{background:var(--brand-light);transform:translateY(-2px);}
.to-top svg{width:18px;height:18px;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .hero-float{display:none;}
}
@media (max-width:991px){
  .container{padding-left:24px;padding-right:24px;}
  .main-nav,.nav-actions .btn-cta{display:none;}
  .burger{display:inline-flex;}
  .nav-inner{height:64px;}
  .hero{min-height:auto;padding:130px 0 120px;}
  .hero-sub{max-width:none;}
  .section{padding:72px 0;}
  .metric-col{border-right:none;border-bottom:1px solid var(--line);}
  .metric-col:nth-child(2n){border-right:none;}
  .mini-card.wide{grid-column:span 1;}
  .cmp-row{grid-template-columns:1fr;gap:14px;padding:22px 0;}
  .cmp-side.left{align-items:flex-start;}
  .cmp-name{text-align:left;padding:0;order:-1;font-size:15px;}
  .cmp-name::before,.cmp-name::after{display:none;}
  .compare-head{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .section{padding:56px 0;}
  .metrics-wrap{margin-top:-48px;}
  .metric{padding:20px;}
  .metric::before{left:20px;right:20px;}
  .matrix-wide .mw-body,.mini-card{padding:22px;}
  .form-panel{padding:24px;}
  .footer-grid{grid-template-columns:1fr;}
  .site-footer{padding-top:48px;}
  .hero-actions .btn-primary-x,.hero-actions .btn-glass{width:100%;}
}
@media (max-width:575px){
  .hero{padding:118px 0 100px;}
  .hero-trust{gap:14px 20px;}
  .metric-num{font-size:32px;}
  .form-panel{border-radius:16px;}
  .to-top{right:16px;bottom:16px;}
}

/* roulang page: article */
:root{
  --brand:#1450B4;
  --brand-2:#2A73E8;
  --brand-soft:#EDF3FC;
  --brand-deep:#0D2C5E;
  --accent:#F26B21;
  --accent-dark:#D95A15;
  --teal:#12A594;
  --danger:#D9433F;
  --bg:#F7FAFE;
  --card:#FFFFFF;
  --text:#10233F;
  --muted:#5C6E88;
  --weak:#8A98AD;
  --line:#E2EAF5;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --sh-1:0 6px 20px rgba(13,44,94,.06);
  --sh-2:0 14px 32px rgba(13,44,94,.10);
  --sh-3:0 20px 44px rgba(13,44,94,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-primary:#1450B4;
  --bs-body-color:#10233F;
  --bs-body-bg:#F7FAFE;
  --bs-border-color:#E2EAF5;
  --bs-border-radius:16px;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --bs-link-color:#1450B4;
  --bs-link-hover-color:#F26B21;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums lining-nums;
}
img{max-width:100%;height:auto;display:block}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--accent)}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;line-height:1.3}
p{margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
@media (min-width:1400px){.container{max-width:1280px}}
@media (max-width:991px){.container{padding:0 24px}}
@media (max-width:575px){.container{padding:0 20px}}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1030;
  background:rgba(255,255,255,.14);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid rgba(255,255,255,.28);
  box-shadow:0 8px 24px rgba(13,44,94,.10);
  transition:background .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;flex:0 0 auto}
.brand:hover{color:#fff}
.brand-mark{width:28px;height:28px;flex:0 0 28px}
.brand-text{display:block;line-height:1.15}
.brand-name{display:block;font-size:17px;font-weight:700;letter-spacing:.01em}
.brand-sub{display:block;font-size:11px;letter-spacing:.14em;opacity:.8}
.main-nav{display:flex;align-items:center;gap:4px}
.main-nav a{
  display:inline-flex;align-items:center;height:38px;padding:0 14px;border-radius:var(--r-pill);
  color:rgba(255,255,255,.88);font-size:15px;font-weight:500;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.16)}
.main-nav a.active{color:#fff;background:rgba(255,255,255,.2)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.icon-btn{
  width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-sm);border:1px solid rgba(255,255,255,.32);
  background:rgba(255,255,255,.12);color:#fff;cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.icon-btn:hover{background:rgba(255,255,255,.24)}
.btn-cta{
  display:inline-flex;align-items:center;justify-content:center;height:42px;padding:0 22px;
  border-radius:var(--r-sm);background:var(--accent);color:#fff;font-weight:600;font-size:15px;letter-spacing:.02em;
  box-shadow:0 8px 18px rgba(242,107,33,.28);border:0;
  transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-cta:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px)}
.btn-cta:active{transform:translateY(1px);box-shadow:none}
.burger{display:none;position:relative;width:42px;height:42px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.32);background:rgba(255,255,255,.12);color:#fff;cursor:pointer}
.burger span,.burger::before,.burger::after{
  content:"";position:absolute;left:12px;right:12px;height:2px;border-radius:2px;background:currentColor;
  transition:transform .24s var(--ease),opacity .2s var(--ease),top .24s var(--ease),bottom .24s var(--ease);
}
.burger span{top:50%;margin-top:-1px}
.burger::before{top:14px}
.burger::after{bottom:14px}
.site-header.nav-open .burger span{opacity:0}
.site-header.nav-open .burger::before{top:50%;transform:translateY(-1px) rotate(45deg)}
.site-header.nav-open .burger::after{bottom:50%;transform:translateY(1px) rotate(-45deg)}

.site-header.is-stuck{
  background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--line);
  box-shadow:0 10px 28px rgba(13,44,94,.12);
}
.site-header.is-stuck .brand,
.site-header.is-stuck .icon-btn,
.site-header.is-stuck .burger{color:var(--text)}
.site-header.is-stuck .brand-sub{color:var(--muted);opacity:1}
.site-header.is-stuck .main-nav a{color:var(--muted)}
.site-header.is-stuck .main-nav a:hover{color:var(--brand);background:var(--brand-soft)}
.site-header.is-stuck .main-nav a.active{color:var(--brand);background:var(--brand-soft)}
.site-header.is-stuck .icon-btn,
.site-header.is-stuck .burger{border-color:var(--line);background:#fff}
.site-header.is-stuck .btn-cta{box-shadow:0 8px 18px rgba(242,107,33,.22)}

@media (max-width:991px){
  .nav-inner{height:64px}
  .burger{display:block}
  .icon-btn{display:none}
  .main-nav{
    position:fixed;left:0;right:0;top:64px;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;padding:14px 20px 22px;
    border-radius:0 0 24px 24px;
    box-shadow:0 20px 44px rgba(13,44,94,.14);
    opacity:0;visibility:hidden;transform:translateY(-12px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  .site-header.nav-open .main-nav{opacity:1;visibility:visible;transform:none}
  .main-nav a,.site-header.is-stuck .main-nav a{
    height:56px;padding:0 6px;border-radius:12px;font-size:18px;font-weight:600;color:var(--text);
  }
  .main-nav a:hover,.main-nav a.active{background:var(--brand-soft);color:var(--brand)}
  .nav-actions .btn-cta{height:44px;padding:0 18px}
}
@media (max-width:575px){
  .brand-name{font-size:16px}
  .brand-sub{display:none}
}

/* ---------- 文章头部横幅 ---------- */
.article-hero{
  position:relative;
  padding:150px 0 64px;
  background-image:linear-gradient(100deg,rgba(13,44,94,.92),rgba(13,44,94,.62) 52%,rgba(20,80,180,.48)),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  border-radius:0 0 32px 32px;
  overflow:hidden;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:56px 56px;
  pointer-events:none;
}
.article-hero .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:22px}
.crumb a{color:rgba(255,255,255,.86)}
.crumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.crumb .sep{color:rgba(255,255,255,.45)}
.crumb .now{max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#fff}
.pill{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:500;
}
.pill-glass{background:rgba(255,255,255,.18);color:#fff;border:1px solid rgba(255,255,255,.34)}
.article-hero h1{
  margin:16px 0 0;
  font-size:clamp(30px,3.6vw,40px);
  line-height:1.32;
  letter-spacing:-.01em;
  color:#fff;
  max-width:22ch;
  text-shadow:0 2px 12px rgba(13,44,94,.32);
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;margin-top:22px;font-size:14px;color:rgba(255,255,255,.82)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.5)}

/* ---------- 正文与侧栏 ---------- */
.article-main{padding:64px 0 88px}
.layout-row{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:40px;align-items:start}
.main-col{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:44px 46px 38px;
}
.section-head{display:flex;align-items:center;gap:12px;margin-bottom:26px}
.section-head::before{content:"";width:4px;height:22px;border-radius:2px;background:var(--brand)}
.section-head h2{font-size:22px;font-weight:700}
.article-body{max-width:780px;font-size:16.5px;line-height:1.9;color:#182B45}
.article-body > * + *{margin-top:1.15em}
.article-body p{color:#22344F}
.article-body h2{
  font-size:24px;line-height:1.4;margin-top:2em;padding-left:14px;position:relative;scroll-margin-top:110px;
}
.article-body h2::before{content:"";position:absolute;left:0;top:6px;width:4px;height:22px;border-radius:2px;background:var(--brand)}
.article-body h3{font-size:20px;font-weight:600;margin-top:1.7em;color:var(--text)}
.article-body ul,.article-body ol{padding-left:1.6em}
.article-body ul li{list-style:none;position:relative;margin:.5em 0}
.article-body ul li::before{content:"";position:absolute;left:-1.1em;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--brand-2)}
.article-body ol{list-style:decimal}
.article-body ol li{margin:.5em 0;padding-left:.2em}
.article-body ol li::marker{color:var(--brand);font-weight:600}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;border-left:3px solid var(--accent);
  background:var(--brand-soft);border-radius:0 12px 12px 0;color:#1B3557;
}
.article-body blockquote p{margin:0}
.article-body img{border-radius:12px;margin:1.6em auto;box-shadow:var(--sh-1)}
.article-body figure{margin:1.8em 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--weak);margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;border-radius:12px;overflow:hidden;box-shadow:var(--sh-1);margin:1.6em 0}
.article-body thead th{background:var(--brand-soft);color:var(--brand-deep);font-weight:600;text-align:left}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line)}
.article-body tbody tr:nth-child(even){background:#FAFCFF}
.article-body code{background:var(--brand-soft);color:#0F3D8F;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;padding:2px 6px;border-radius:6px}
.article-body pre{background:#0F2647;color:#E8F0FB;padding:18px 20px;border-radius:12px;overflow:auto;font-size:14px}
.article-body pre code{background:none;color:inherit;padding:0}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--accent)}

.empty-state{
  min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;padding:40px 20px;border:1px dashed var(--line);border-radius:var(--r-md);background:#FBFDFF;
}
.empty-state svg{width:44px;height:44px;color:var(--brand-2)}
.empty-state h3{font-size:20px}
.empty-state p{font-size:15px;color:var(--muted);max-width:40ch}
.empty-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:6px}

.btn-outline-c,.btn-solid-c,.btn-ghost-c{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);font-weight:600;font-size:15px;letter-spacing:.02em;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-outline-c{border:1px solid rgba(20,80,180,.45);color:var(--brand);background:#fff}
.btn-outline-c:hover{background:rgba(20,80,180,.08);color:var(--brand);transform:translateY(-1px)}
.btn-solid-c{border:1px solid var(--accent);background:var(--accent);color:#fff;box-shadow:0 10px 22px rgba(242,107,33,.24)}
.btn-solid-c:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff;transform:translateY(-1px)}
.btn-solid-c:active,.btn-outline-c:active{transform:translateY(1px);box-shadow:none}

/* 标签 */
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:38px;padding-top:26px;border-top:1px solid var(--line)}
.tag-row .label{font-size:14px;color:var(--weak);margin-right:4px}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:500;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.tag:hover{background:var(--brand);color:#fff}

/* 侧栏 */
.side-col{position:sticky;top:96px;display:grid;gap:22px}
.side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);padding:24px}
.side-card h3{font-size:17px;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.side-card h3::before{content:"";width:4px;height:18px;border-radius:2px;background:var(--brand)}
.toc-list li + li{margin-top:10px}
.toc-list a{display:flex;align-items:center;gap:8px;font-size:15px;color:var(--muted);text-decoration:none}
.toc-list a:hover{color:var(--brand)}
.toc-list a .idx{font-size:12px;color:var(--brand);background:var(--brand-soft);border-radius:6px;padding:1px 7px;font-weight:600}
.side-links li + li{margin-top:2px}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 0;font-size:15px;color:var(--text);border-bottom:1px solid var(--line);
}
.side-links li:last-child a{border-bottom:0}
.side-links a:hover{color:var(--brand);padding-left:2px}
.side-links .sub{font-size:13px;color:var(--weak)}
.side-cta{background:var(--brand-soft);border:1px solid #D9E6FA;box-shadow:none}
.side-cta p{font-size:14px;color:var(--muted);margin:8px 0 16px}
.side-cta .btn-solid-c{width:100%;height:44px}

/* 上一篇 / 下一篇 */
.pn-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:34px}
.pn-card{
  display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 24px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.pn-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(20,80,180,.3)}
.pn-card .k{font-size:13px;color:var(--weak);letter-spacing:.05em}
.pn-card .t{display:block;margin-top:8px;font-size:17px;font-weight:600;color:var(--text)}
.pn-card .d{display:block;margin-top:6px;font-size:14px;color:var(--muted)}
.pn-card.right{text-align:right}

/* ---------- 相关阅读 ---------- */
.related{padding:88px 0;background:#fff;border-top:1px solid var(--line)}
.block-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:40px}
.block-head h2{font-size:32px;line-height:1.3;position:relative;padding-left:16px}
.block-head h2::before{content:"";position:absolute;left:0;top:8px;width:4px;height:24px;border-radius:2px;background:var(--brand)}
.block-head p{margin-top:10px;font-size:15px;color:var(--muted);max-width:56ch}
.more-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand)}
.more-link:hover{color:var(--accent)}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.rcard{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.rcard:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(20,80,180,.3)}
.rcard .thumb{position:relative;aspect-ratio:16/10;background:linear-gradient(135deg,#E4EEFC,#F4F8FE);overflow:hidden}
.rcard .thumb img{width:100%;height:100%;object-fit:cover}
.rcard .thumb .tag{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.92)}
.rcard .body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.rcard h3{font-size:18px;line-height:1.45}
.rcard p{font-size:14.5px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.rcard .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--weak)}

/* ---------- CTA 条 ---------- */
.cta-band{padding:0 0 88px}
.cta-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  background:linear-gradient(120deg,#0D2C5E,#1450B4 62%,#2A73E8);
  border-radius:20px;padding:40px 44px;box-shadow:var(--sh-3);color:#fff;
}
.cta-inner h2{color:#fff;font-size:26px;line-height:1.35}
.cta-inner p{color:rgba(255,255,255,.82);font-size:15px;margin-top:10px;max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.btn-glass{
  display:inline-flex;align-items:center;justify-content:center;height:46px;padding:0 24px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.5);color:#fff;font-weight:600;font-size:15px;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.btn-glass:hover{background:rgba(255,255,255,.28);color:#fff;transform:translateY(-1px)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-deep);color:rgba(255,255,255,.72);padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff}
.footer-brand .brand-mark{width:28px;height:28px}
.footer-brand .brand-name{display:block;font-size:17px;font-weight:700}
.footer-brand .brand-sub{display:block;font-size:11px;letter-spacing:.14em;opacity:.7}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);margin-top:16px;max-width:30ch}
.footer-col h4{font-size:15px;font-weight:600;color:rgba(255,255,255,.9);margin-bottom:16px}
.footer-col ul li + li{margin-top:2px}
.footer-col a,.footer-col p{font-size:14px;color:rgba(255,255,255,.65);line-height:2}
.footer-col a{display:inline-block;transition:color .2s var(--ease),transform .2s var(--ease)}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:13px;color:rgba(255,255,255,.55);
}
@media (max-width:991px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}}
@media (max-width:575px){.site-footer{padding:48px 0 24px}.footer-grid{grid-template-columns:1fr}}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;
  border:0;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s,background .2s var(--ease);
  z-index:1040;
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--accent)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .main-col{padding:38px 34px 32px}
}
@media (max-width:991px){
  .article-hero{padding:118px 0 48px;border-radius:0 0 24px 24px}
  .layout-row{grid-template-columns:minmax(0,1fr);gap:28px}
  .side-col{position:static}
  .article-main{padding:48px 0 64px}
  .related{padding:64px 0}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .block-head h2{font-size:27px}
  .cta-inner{padding:32px 28px}
}
@media (max-width:767px){
  .main-col{padding:28px 22px 24px;border-radius:var(--r-md)}
  .article-hero{padding:104px 0 40px}
  .article-hero h1{max-width:none}
  .article-body{font-size:16px;line-height:1.88}
  .article-body h2{font-size:21px}
  .article-body h3{font-size:18px}
  .pn-grid{grid-template-columns:minmax(0,1fr)}
  .pn-card.right{text-align:left}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .cta-inner h2{font-size:22px}
  .cta-actions{width:100%}
  .cta-actions .btn-solid-c,.cta-actions .btn-glass{width:100%;height:48px}
  .empty-actions .btn-outline-c,.empty-actions .btn-solid-c{width:100%;height:48px}
}
@media (max-width:575px){
  .block-head h2{font-size:24px}
  .btn-solid-c,.btn-outline-c{height:44px;padding:0 18px}
}

/* roulang page: category1 */
:root{
  --c-primary:#1450B4;
  --c-primary-2:#2A73E8;
  --c-light:#EDF3FC;
  --c-deep:#0D2C5E;
  --c-accent:#F26B21;
  --c-accent-dark:#D95A16;
  --c-teal:#12A594;
  --c-danger:#D9433F;
  --bg:#F7FAFE;
  --white:#FFFFFF;
  --tx:#10233F;
  --tx2:#5C6E88;
  --tx3:#8A98AD;
  --line:#E2EAF5;
  --r-btn:10px;
  --r-card:16px;
  --r-lg:24px;
  --r-hero:32px;
  --r-pill:999px;
  --sh1:0 6px 20px rgba(13,44,94,.06);
  --sh2:0 14px 32px rgba(13,44,94,.10);
  --sh3:0 20px 44px rgba(13,44,94,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-primary:#1450B4;
  --bs-body-color:#10233F;
  --bs-body-bg:#F7FAFE;
  --bs-border-color:#E2EAF5;
  --bs-border-radius:16px;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--tx);
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px;transition:color .2s var(--ease)}
a:hover{color:var(--c-accent)}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{font-weight:700;color:var(--tx);letter-spacing:-.01em}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
::selection{background:rgba(42,115,232,.18)}

/* 容器 */
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:32px;padding-right:32px}
@media (min-width:1400px){.container{max-width:1280px}}
@media (max-width:991px){.container{padding-left:24px;padding-right:24px}}
@media (max-width:575px){.container{padding-left:20px;padding-right:20px}}

/* 顶部导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1030;
  background:rgba(255,255,255,.14);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid rgba(255,255,255,.28);
  box-shadow:0 8px 24px rgba(13,44,94,.10);
  transition:background .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.site-header.is-stuck{
  background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--line);
  box-shadow:0 10px 30px rgba(13,44,94,.12);
}
.nav-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff;flex:0 0 auto}
.brand-mark{width:28px;height:28px;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.01em}
.brand-sub{font-size:12px;font-weight:500;opacity:.72;letter-spacing:.08em}
.site-header.is-stuck .brand{color:var(--c-deep)}
.site-header.is-stuck .brand-sub{color:var(--tx3);opacity:1}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto}
.main-nav > a{
  position:relative;
  color:rgba(255,255,255,.92);
  text-decoration:none;
  font-size:15px;
  font-weight:500;
  padding:6px 2px;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.main-nav > a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--c-accent);transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease);
}
.main-nav > a:hover{color:#fff}
.main-nav > a:hover::after{transform:scaleX(1)}
.main-nav > a.active{color:#fff;font-weight:600}
.main-nav > a.active::after{transform:scaleX(1);background:var(--c-accent)}
.site-header.is-stuck .main-nav > a{color:var(--tx2)}
.site-header.is-stuck .main-nav > a:hover{color:var(--c-primary)}
.site-header.is-stuck .main-nav > a.active{color:var(--c-primary)}
.site-header.is-stuck .main-nav > a.active::after{background:var(--c-primary)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.34);
  background:rgba(255,255,255,.12);color:#fff;cursor:pointer;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.icon-btn:hover{background:rgba(255,255,255,.24)}
.site-header.is-stuck .icon-btn{color:var(--c-primary);border-color:var(--line);background:#fff}
.site-header.is-stuck .icon-btn:hover{background:var(--c-light)}
.btn-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;padding:0 26px;border-radius:var(--r-btn);
  background:var(--c-accent);color:#fff;font-size:15px;font-weight:600;letter-spacing:.02em;
  text-decoration:none;border:1px solid transparent;
  box-shadow:0 8px 18px rgba(242,107,33,.26);
  transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-cta:hover{background:var(--c-accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(242,107,33,.30)}
.btn-cta:active{transform:translateY(1px);box-shadow:none}
.burger{
  display:none;width:40px;height:40px;border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.34);background:rgba(255,255,255,.12);
  cursor:pointer;position:relative;
}
.burger span,.burger span::before,.burger span::after{
  position:absolute;left:50%;width:16px;height:1.8px;border-radius:2px;background:#fff;
  transform:translateX(-50%);transition:transform .24s var(--ease),opacity .2s var(--ease);
}
.burger span{top:50%;margin-top:-1px}
.burger span::before{content:"";left:0;transform:none;top:-6px}
.burger span::after{content:"";left:0;transform:none;top:6px}
.site-header.is-stuck .burger{border-color:var(--line);background:#fff}
.site-header.is-stuck .burger span,
.site-header.is-stuck .burger span::before,
.site-header.is-stuck .burger span::after{background:var(--c-deep)}
.drawer-foot{display:none}

/* 汉堡展开态 */
body.nav-open .burger span{background:transparent}
body.nav-open .burger span::before{transform:rotate(45deg);top:0}
body.nav-open .burger span::after{transform:rotate(-45deg);top:0}

/* 页头横幅 */
.page-hero{
  position:relative;overflow:hidden;
  border-radius:0 0 var(--r-hero) var(--r-hero);
  background:#0D2C5E url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding:130px 0 56px;
  min-height:360px;
  display:flex;align-items:flex-end;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(13,44,94,.86) 0%,rgba(13,44,94,.66) 46%,rgba(13,44,94,.34) 100%);
}
.page-hero::after{
  content:"";position:absolute;right:-40px;bottom:-40px;width:320px;height:320px;
  background-image:linear-gradient(rgba(255,255,255,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.14) 1px,transparent 1px);
  background-size:26px 26px;opacity:.35;pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.crumbs{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:18px}
.crumbs a{color:rgba(255,255,255,.78);text-decoration:none}
.crumbs a:hover{color:#fff;text-decoration:underline}
.crumbs .sep{opacity:.5}
.crumbs .current{color:#fff}
.page-hero h1{
  color:#fff;
  font-size:clamp(28px,3.4vw,42px);
  line-height:1.24;
  letter-spacing:-.02em;
  max-width:800px;
  margin-bottom:16px;
}
.hero-lead{color:rgba(255,255,255,.86);font-size:16px;max-width:620px;margin-bottom:22px}
.pill-row{display:flex;flex-wrap:wrap;gap:10px}
.pill-row .pill{
  display:inline-flex;align-items:center;height:26px;padding:0 14px;
  border-radius:var(--r-pill);background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.30);
  color:#fff;font-size:13px;font-weight:500;line-height:1;
}

/* 板块 */
.sec{padding:96px 0}
.sec-alt{background:var(--bg)}
.sec-white{background:#fff}
.sec-lightblue{background:var(--c-light)}
.sec-head{max-width:780px;margin-bottom:40px}
.sec-head h2{
  display:flex;align-items:center;
  font-size:clamp(28px,3vw,34px);line-height:1.3;letter-spacing:-.01em;
  margin-bottom:14px;
}
.sec-head h2::before{
  content:"";width:4px;height:22px;border-radius:2px;background:var(--c-primary);
  margin-right:14px;flex:0 0 auto;
}
.sec-head p{color:var(--tx2);font-size:16px;line-height:1.8}
.sec-head .sec-link{margin-top:14px;display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;text-decoration:none}
.sec-head .sec-link svg{transition:transform .2s var(--ease)}
.sec-head .sec-link:hover svg{transform:translateX(3px)}

/* 按钮 */
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;padding:0 26px;border-radius:var(--r-btn);
  background:var(--c-accent);color:#fff;font-size:15px;font-weight:600;letter-spacing:.02em;
  text-decoration:none;border:none;cursor:pointer;
  transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-main:hover{background:var(--c-accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(242,107,33,.28)}
.btn-main:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  background:transparent;color:var(--c-primary);font-size:15px;font-weight:600;
  border:1px solid rgba(20,80,180,.42);text-decoration:none;cursor:pointer;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.btn-ghost:hover{background:rgba(20,80,180,.08);color:var(--c-primary);border-color:var(--c-primary);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-block{width:100%}

/* 数据卡 */
.stat-card{
  position:relative;overflow:hidden;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 26px 24px;box-shadow:var(--sh1);height:100%;
}
.stat-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-primary-2));
}
.stat-card.is-accent::before{background:linear-gradient(90deg,var(--c-accent),#FF9A5B)}
.stat-num{
  font-size:40px;font-weight:700;line-height:1.1;color:var(--c-primary);
  font-variant-numeric:tabular-nums lining-nums;letter-spacing:-.02em;
}
.stat-num .unit{font-size:14px;font-weight:500;color:var(--tx2);margin-left:4px;letter-spacing:0}
.stat-label{font-size:14px;color:var(--tx2);margin-top:10px;line-height:1.6}
.stat-note{font-size:13px;color:var(--tx3);margin-top:6px}

/* 主体：锚点侧栏 + 内容块 */
.anchor-nav a{
  display:block;padding:9px 12px;border-radius:var(--r-btn);
  font-size:14px;font-weight:500;color:var(--tx2);text-decoration:none;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.anchor-nav a:hover{background:var(--c-light);color:var(--c-primary)}
.anchor-nav a.active{background:var(--c-light);color:var(--c-primary);font-weight:600}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh1);
}
.side-card img{border-radius:12px;aspect-ratio:16/10;object-fit:cover;width:100%;margin-bottom:16px}
.side-note{font-size:13px;color:var(--tx3);line-height:1.7;margin-bottom:18px}
.side-card .anchor-nav{margin-bottom:18px}
.sticky-col{position:sticky;top:96px}

.entry-block{
  padding:28px;border-radius:var(--r-card);
  transition:background .2s var(--ease);
  scroll-margin-top:100px;
}
.entry-block + .entry-block{border-top:1px solid var(--line)}
.entry-block:hover{background:var(--c-light)}
.entry-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.num{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:10px;flex:0 0 auto;
  background:var(--c-light);color:var(--c-primary);
  font-size:14px;font-weight:600;letter-spacing:.02em;font-variant-numeric:tabular-nums;
}
.entry-head h2{font-size:20px;line-height:1.4;font-weight:600}
.entry-desc{color:var(--tx2);font-size:15px;line-height:1.8;margin-bottom:14px}
.entry-list{margin-bottom:18px}
.entry-list li{
  position:relative;padding-left:22px;margin-bottom:8px;
  font-size:15px;line-height:1.7;color:var(--tx2);
}
.entry-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:3px;
  background:var(--c-light);border:1px solid rgba(20,80,180,.38);
}
.inline-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--c-primary);text-decoration:none;
  border-bottom:1px solid rgba(20,80,180,.28);padding-bottom:2px;
}
.inline-link svg{transition:transform .2s var(--ease)}
.inline-link:hover{color:var(--c-accent);border-bottom-color:rgba(242,107,33,.42)}
.inline-link:hover svg{transform:translateX(3px)}

/* 对比区 */
.cmp-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:12px 30px;box-shadow:var(--sh1)}
.cmp-row{
  display:grid;grid-template-columns:220px 1fr;gap:28px;align-items:center;
  padding:22px 0;border-bottom:1px dashed var(--line);
}
.cmp-row:last-child{border-bottom:none}
.cmp-name{font-size:15px;font-weight:600;color:var(--tx);line-height:1.6}
.bar-line{display:grid;grid-template-columns:76px 1fr 56px;align-items:center;gap:12px;margin:7px 0}
.bar-label{font-size:13px;color:var(--tx3);line-height:1.4}
.bar-track{height:8px;border-radius:var(--r-pill);background:var(--line);overflow:hidden}
.bar-fill{display:block;height:100%;border-radius:var(--r-pill)}
.bar-fill.is-ours{background:linear-gradient(90deg,var(--c-primary),var(--c-primary-2))}
.bar-fill.is-theirs{background:#C7D3E4}
.bar-val{font-size:13px;color:var(--tx2);text-align:right;font-variant-numeric:tabular-nums}

/* FAQ */
.faq-col{max-width:880px;margin:0 auto}
.accordion-item{background:transparent;border:none}
.accordion-button{
  background:transparent!important;
  box-shadow:none!important;
  color:var(--tx)!important;
  font-size:17px;font-weight:600;line-height:1.5;
  padding:22px 44px 22px 0;
  border-radius:0!important;
  border-top:1px solid var(--line);
}
.accordion-item:last-child .accordion-button{border-bottom:1px solid var(--line)}
.accordion-button:not(.collapsed){color:var(--c-primary)!important}
.accordion-button::after{
  content:""!important;
  width:16px!important;height:16px!important;
  margin-left:auto;
  background-image:linear-gradient(var(--c-primary-2),var(--c-primary-2)),linear-gradient(var(--c-primary-2),var(--c-primary-2))!important;
  background-size:16px 1.5px,1.5px 16px!important;
  background-position:center,center!important;
  background-repeat:no-repeat!important;
  transition:transform .22s var(--ease);
}
.accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);
  background-image:linear-gradient(var(--c-accent),var(--c-accent)),linear-gradient(var(--c-accent),var(--c-accent))!important;
}
.accordion-button:focus{outline:none}
.accordion-button:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.accordion-body{
  padding:0 40px 24px 0;
  font-size:15px;line-height:1.85;color:var(--tx2);
}
.accordion-body p + p{margin-top:10px}

/* CTA 条 */
.cta-bar{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  background:#fff;border:1px solid var(--line);border-radius:20px;
  padding:28px 32px;box-shadow:var(--sh2);
}
.cta-bar h2{font-size:20px;line-height:1.5;font-weight:600;margin-bottom:6px}
.cta-bar p{font-size:14px;color:var(--tx2);line-height:1.7}
.cta-bar .btn-main{flex:0 0 auto}

/* 页脚 */
.site-footer{
  background:var(--c-deep);color:rgba(255,255,255,.72);
  padding:72px 0 28px;margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:14px}
.footer-brand .brand-mark{color:#fff}
.footer-brand .brand-name{font-size:17px;font-weight:700}
.footer-brand .brand-sub{font-size:12px;font-weight:500;color:rgba(255,255,255,.62);letter-spacing:.08em}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:260px}
.footer-col h4{font-size:15px;font-weight:600;color:rgba(255,255,255,.82);margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col a{
  font-size:14px;color:rgba(255,255,255,.65);text-decoration:none;
  display:inline-block;transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-col p{font-size:14px;color:rgba(255,255,255,.65);line-height:1.8;margin-bottom:8px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;color:rgba(255,255,255,.55);
}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  width:44px;height:44px;border-radius:50%;border:none;cursor:pointer;
  background:var(--c-primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--sh2);opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),background .2s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--c-primary-2)}

/* 响应式 */
@media (max-width:1199px){
  .main-nav{gap:18px}
  .main-nav > a{font-size:14px}
}
@media (max-width:991px){
  .nav-inner{height:64px}
  .main-nav{
    position:fixed;top:64px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-radius:0 0 24px 24px;
    box-shadow:var(--sh3);
    padding:8px 20px 20px;
    max-height:calc(100vh - 64px);overflow:auto;
    opacity:0;visibility:hidden;transform:translateY(-12px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  body.nav-open .main-nav{opacity:1;visibility:visible;transform:none}
  .main-nav > a{
    height:56px;display:flex;align-items:center;
    padding:0 4px;font-size:18px;font-weight:600;color:var(--tx);
    border-bottom:1px solid var(--line);border-radius:0;
  }
  .main-nav > a::after{display:none}
  .main-nav > a:hover{color:var(--c-primary);background:transparent}
  .main-nav > a.active{color:var(--c-primary);font-weight:700;background:transparent}
  .site-header.is-stuck .main-nav > a,
  .site-header .main-nav > a{color:var(--tx)}
  .site-header .main-nav > a.active{color:var(--c-primary)}
  .drawer-foot{display:block;margin-top:18px}
  .drawer-foot .btn-cta{width:100%;height:48px}
  .nav-actions .btn-cta{display:none}
  .burger{display:inline-block}
  .brand-name{font-size:16px}
  .sec{padding:72px 0}
  .page-hero{padding:112px 0 44px;min-height:300px;border-radius:0 0 24px 24px}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:26px}
  .cta-bar .btn-main{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cmp-row{grid-template-columns:1fr;gap:12px}
  .sticky-col{position:static;margin-bottom:28px}
}
@media (max-width:767px){
  .sec{padding:64px 0}
  .page-hero{padding:104px 0 40px;min-height:260px}
  .hero-lead{font-size:15px}
  .entry-block{padding:22px 16px}
  .cmp-wrap{padding:6px 18px}
  .bar-line{grid-template-columns:70px 1fr 48px;gap:10px}
}
@media (max-width:575px){
  .sec{padding:56px 0}
  .brand-sub{display:none}
  .stat-num{font-size:34px}
  .entry-head h2{font-size:18px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .cta-bar h2{font-size:18px}
  .to-top{right:16px;bottom:16px}
}

/* roulang page: category2 */
:root{
  --brand:#1450B4;
  --brand-bright:#2A73E8;
  --brand-soft:#EDF3FC;
  --brand-deep:#0D2C5E;
  --accent:#F26B21;
  --accent-dark:#D95A15;
  --teal:#12A594;
  --warn:#D9433F;
  --page:#F7FAFE;
  --card:#FFFFFF;
  --text:#10233F;
  --text-2:#5C6E88;
  --text-3:#8A98AD;
  --line:#E2EAF5;
  --r-btn:10px;
  --r-card:16px;
  --r-lg:20px;
  --r-xl:24px;
  --sh-1:0 6px 20px rgba(13,44,94,.06);
  --sh-2:0 14px 32px rgba(13,44,94,.10);
  --sh-3:0 20px 44px rgba(13,44,94,.12);
  --ease:cubic-bezier(.2,.7,.3,1);

  --bs-primary:#1450B4;
  --bs-primary-rgb:20,80,180;
  --bs-body-color:#10233F;
  --bs-body-bg:#F7FAFE;
  --bs-border-color:#E2EAF5;
  --bs-border-radius:10px;
  --bs-link-color:#1450B4;
  --bs-link-hover-color:#F26B21;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",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;
  background:var(--page);
  color:var(--text);
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%;height:auto;display:block;}
ul,ol{list-style:none;margin:0;padding:0;}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--accent);}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;}
svg{display:block;}

:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

.container,
.container-sm,
.container-md,
.container-lg,
.container-xl{
  width:100%;
  max-width:1200px;
  margin-left:auto;
  margin-right:auto;
  padding-left:32px;
  padding-right:32px;
}
@media (min-width:1400px){
  .container,.container-sm,.container-md,.container-lg,.container-xl{max-width:1280px;}
}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1030;
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid rgba(226,234,245,.9);
  box-shadow:0 8px 24px rgba(13,44,94,.06);
  transition:background .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.site-header.is-stuck{
  background:rgba(255,255,255,.94);
  border-bottom-color:var(--line);
  box-shadow:0 8px 24px rgba(13,44,94,.12);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:72px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  text-decoration:none;
  flex-shrink:0;
}
.brand:hover{color:var(--text);}
.brand-mark{
  width:28px;height:28px;
  color:var(--brand);
  flex-shrink:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{
  font-size:17px;
  font-weight:700;
  letter-spacing:-.01em;
  color:inherit;
}
.brand-sub{
  font-size:12px;
  font-weight:500;
  letter-spacing:.08em;
  color:var(--text-3);
}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.main-nav a{
  display:inline-block;
  padding:8px 14px;
  border-radius:999px;
  font-size:15px;
  font-weight:500;
  color:var(--text-2);
  white-space:nowrap;
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.main-nav a:hover{color:var(--brand);background:var(--brand-soft);}
.main-nav a.active{
  color:var(--brand);
  background:var(--brand-soft);
  font-weight:600;
}
.nav-actions{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:40px;height:40px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.66);
  color:var(--text-2);
  cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:rgba(20,80,180,.3);background:var(--brand-soft);}
.btn-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:42px;
  padding:0 22px;
  border-radius:var(--r-btn);
  background:var(--accent);
  color:#fff;
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  border:none;
  box-shadow:0 8px 18px rgba(242,107,33,.24);
  transition:background-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-cta:hover{
  background:var(--accent-dark);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:0 12px 24px rgba(242,107,33,.28);
}
.btn-cta:active{transform:translateY(1px);box-shadow:none;}
.burger{
  display:none;
  width:42px;height:42px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.66);
  position:relative;
  cursor:pointer;
}
.burger span,
.burger span::before,
.burger span::after{
  position:absolute;
  left:50%;
  width:18px;height:1.8px;
  background:var(--text);
  border-radius:2px;
  transform:translateX(-50%);
  transition:transform .22s var(--ease),opacity .22s var(--ease),background-color .22s var(--ease);
}
.burger span{top:50%;margin-top:-.9px;}
.burger span::before{content:"";top:-6px;left:0;transform:none;}
.burger span::after{content:"";top:6px;left:0;transform:none;}
.burger.is-open span{background:transparent;}
.burger.is-open span::before{transform:translateY(6px) rotate(45deg);background:var(--brand);}
.burger.is-open span::after{transform:translateY(-6px) rotate(-45deg);background:var(--brand);}

/* ============ 页头横幅 ============ */
.page-banner{
  position:relative;
  padding:140px 0 60px;
  background-color:#EDF3FC;
  background-image:
    linear-gradient(rgba(20,80,180,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(20,80,180,.05) 1px,transparent 1px),
    linear-gradient(160deg,#F4F8FE 0%,#EDF3FC 58%,#E4EEFB 100%);
  background-size:28px 28px,28px 28px,100% 100%;
  border-bottom:1px solid var(--line);
}
.page-banner::after{
  content:"";
  position:absolute;
  right:0;bottom:0;
  width:220px;height:4px;
  background:linear-gradient(90deg,var(--brand),var(--brand-bright));
  opacity:.16;
  border-radius:4px 0 0 0;
}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text-3);
  margin-bottom:18px;
}
.crumb a{color:var(--text-2);text-decoration:none;}
.crumb a:hover{color:var(--brand);}
.crumb span{color:var(--text-3);}
.banner-title{
  font-size:clamp(30px,3.6vw,42px);
  line-height:1.28;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--brand-deep);
  max-width:820px;
}
.banner-lead{
  margin-top:16px;
  font-size:17px;
  color:var(--text-2);
  max-width:720px;
}
.tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:26px;
}
.pill{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 14px;
  border-radius:999px;
  background:var(--brand-soft);
  color:var(--brand);
  font-size:13px;
  font-weight:500;
  line-height:1;
  border:1px solid rgba(20,80,180,.08);
}

/* ============ 交替图文区块 ============ */
.alt-section{
  padding:96px 0 88px;
  background:#FFFFFF;
}
.section-head{
  display:flex;
  align-items:flex-start;
  gap:14px;
  margin-bottom:40px;
}
.section-head .bar{
  width:4px;height:22px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--brand),var(--brand-bright));
  margin-top:9px;
  flex-shrink:0;
}
.section-head h2{
  font-size:clamp(26px,2.6vw,32px);
  line-height:1.32;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--text);
}
.section-head p{
  margin-top:8px;
  font-size:15px;
  color:var(--text-2);
  max-width:640px;
}
.alt-row{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:48px;
  align-items:center;
  padding:56px 0;
  border-bottom:1px solid var(--line);
}
.alt-row:first-of-type{padding-top:8px;}
.alt-row:last-of-type{border-bottom:none;padding-bottom:8px;}
.alt-row.reverse{grid-template-columns:7fr 5fr;}
.alt-row.reverse .alt-media{order:2;}
.img-frame{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  aspect-ratio:16/10;
  background-color:var(--brand-soft);
  background-image:repeating-linear-gradient(135deg,rgba(20,80,180,.09) 0 8px,rgba(20,80,180,.03) 8px 16px);
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.img-frame img{
  width:100%;height:100%;
  object-fit:cover;
  border-radius:var(--r-lg);
}
.alt-body .step-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:30px;
  padding:0 12px;
  border-radius:8px;
  background:var(--brand-soft);
  color:var(--brand);
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  margin-bottom:16px;
}
.alt-body h2{
  font-size:clamp(22px,2.2vw,27px);
  line-height:1.4;
  font-weight:700;
  color:var(--text);
  margin-bottom:16px;
}
.alt-body p{
  font-size:16px;
  color:var(--text-2);
  margin-bottom:14px;
}
.alt-points{margin:20px 0 22px;display:grid;gap:12px;}
.alt-points li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  line-height:1.7;
  color:var(--text);
}
.alt-points li::before{
  content:"";
  position:absolute;
  left:0;top:9px;
  width:8px;height:8px;
  border-radius:3px;
  background:var(--brand-bright);
  opacity:.7;
}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  color:var(--brand);
  border-bottom:1px solid rgba(20,80,180,.28);
  padding-bottom:2px;
  text-underline-offset:3px;
}
.link-more:hover{color:var(--accent);border-bottom-color:rgba(242,107,33,.5);}
.link-more svg{width:16px;height:16px;transition:transform .2s var(--ease);}
.link-more:hover svg{transform:translateX(3px);}

/* ============ 快速入口 ============ */
.quick-section{
  padding:88px 0;
  background:var(--brand-soft);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.quick-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.quick-card{
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  gap:18px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--sh-1);
  color:var(--text);
  min-height:172px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.quick-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--sh-2);
  border-color:rgba(20,80,180,.3);
  color:var(--text);
}
.quick-icon{
  width:40px;height:40px;
  border-radius:12px;
  background:var(--brand-soft);
  color:var(--brand);
  display:flex;align-items:center;justify-content:center;
}
.quick-icon svg{width:20px;height:20px;}
.quick-card h3{
  font-size:18px;
  font-weight:600;
  line-height:1.4;
  margin:14px 0 8px;
}
.quick-card p{
  font-size:14px;
  line-height:1.7;
  color:var(--text-2);
}
.quick-foot{
  display:flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--brand);
}
.quick-card:hover .quick-foot{color:var(--accent);}
.quick-foot svg{width:15px;height:15px;transition:transform .2s var(--ease);}
.quick-card:hover .quick-foot svg{transform:translateX(3px);}

/* ============ FAQ ============ */
.faq-section{
  padding:96px 0;
  background:#FFFFFF;
}
.faq-wrap{max-width:880px;margin:0 auto;}
.accordion{--bs-accordion-border-width:0;--bs-accordion-bg:transparent;--bs-accordion-btn-focus-box-shadow:none;}
.accordion-item{
  background:transparent;
  border:none;
  border-top:1px solid var(--line);
}
.accordion-item:last-child{border-bottom:1px solid var(--line);}
.accordion-button{
  background:transparent;
  color:var(--text);
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  padding:22px 48px 22px 0;
  box-shadow:none;
  border-radius:0;
}
.accordion-button:not(.collapsed){
  color:var(--brand);
  background:transparent;
  box-shadow:none;
}
.accordion-button:hover{background:transparent;color:var(--brand);}
.accordion-button:focus{box-shadow:none;border-color:transparent;}
.accordion-button::after{
  width:20px;height:20px;
  background-size:20px 20px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='%231450B4' stroke-width='1.5' stroke-linecap='round'%3E%3Cpath d='M10 4v12M4 10h12'/%3E%3C/svg%3E");
  transition:transform .22s var(--ease);
  margin-left:auto;
  position:absolute;
  right:2px;
}
.accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='%23F26B21' stroke-width='1.5' stroke-linecap='round'%3E%3Cpath d='M10 4v12M4 10h12'/%3E%3C/svg%3E");
}
.accordion-body{
  padding:0 40px 22px 0;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
}
.accordion-body p+p{margin-top:12px;}

/* ============ 底部 CTA ============ */
.cta-section{
  padding:0 0 96px;
  background:#FFFFFF;
}
.cta-strip{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  background:var(--brand-soft);
  border:1px solid rgba(20,80,180,.12);
  border-radius:var(--r-lg);
  padding:34px 36px;
  box-shadow:var(--sh-1);
}
.cta-strip h2{
  font-size:22px;
  font-weight:700;
  line-height:1.4;
  color:var(--brand-deep);
}
.cta-strip p{
  margin-top:8px;
  font-size:15px;
  color:var(--text-2);
  max-width:620px;
}
.cta-actions{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.btn-primary-solid{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;
  padding:0 26px;
  border-radius:var(--r-btn);
  background:var(--accent);
  color:#fff;
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  border:none;
  box-shadow:0 10px 22px rgba(242,107,33,.24);
  transition:background-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary-solid:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 14px 28px rgba(242,107,33,.28);}
.btn-primary-solid:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;
  padding:0 24px;
  border-radius:var(--r-btn);
  background:transparent;
  border:1px solid var(--brand);
  color:var(--brand);
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  transition:background-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.btn-ghost:hover{background:rgba(20,80,180,.08);color:var(--brand);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--brand-deep);
  color:rgba(255,255,255,.78);
  padding:72px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
}
.footer-brand .brand-mark{color:#fff;}
.footer-brand .brand-name{color:#fff;}
.footer-brand .brand-sub{color:rgba(255,255,255,.6);}
.footer-desc{
  margin-top:16px;
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.65);
  max-width:260px;
}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:rgba(255,255,255,.8);
  margin-bottom:18px;
}
.footer-col ul{display:grid;gap:11px;}
.footer-col li a{
  font-size:14px;
  color:rgba(255,255,255,.65);
  display:inline-block;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-col li a:hover{color:#fff;transform:translateX(2px);}
.footer-col p{
  font-size:14px;
  line-height:1.9;
  color:rgba(255,255,255,.65);
}
.footer-bottom{
  margin-top:52px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.55);
}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;
  right:24px;bottom:24px;
  width:44px;height:44px;
  border-radius:50%;
  border:none;
  background:var(--brand);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s,background-color .2s var(--ease);
  cursor:pointer;
  z-index:1040;
}
.to-top.show{opacity:1;visibility:visible;transform:none;}
.to-top:hover{background:var(--brand-bright);}
.to-top svg{width:18px;height:18px;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .alt-row{gap:40px;}
}
@media (max-width:991px){
  .container,.container-sm,.container-md,.container-lg,.container-xl{padding-left:24px;padding-right:24px;}
  .nav-inner{height:64px;}
  .main-nav{
    position:fixed;
    left:0;right:0;top:64px;
    margin:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:#fff;
    border-radius:0 0 24px 24px;
    padding:8px 20px 24px;
    box-shadow:var(--sh-2);
    opacity:0;
    visibility:hidden;
    transform:translateY(-12px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
    max-height:calc(100vh - 64px);
    overflow-y:auto;
  }
  .main-nav.is-open{opacity:1;visibility:visible;transform:none;}
  .main-nav a{
    font-size:18px;
    font-weight:600;
    line-height:56px;
    padding:0 8px;
    border-radius:12px;
    color:var(--text);
  }
  .main-nav a.active{background:var(--brand-soft);}
  .burger{display:block;}
  .icon-btn{display:none;}
  .page-banner{padding:112px 0 48px;}
  .alt-section,.faq-section{padding:72px 0;}
  .quick-section{padding:68px 0;}
  .cta-section{padding:0 0 72px;}
  .alt-row,
  .alt-row.reverse{
    grid-template-columns:1fr;
    gap:28px;
    padding:44px 0;
  }
  .alt-row.reverse .alt-media{order:0;}
  .quick-grid{grid-template-columns:1fr 1fr;}
  .cta-strip{flex-direction:column;align-items:flex-start;padding:28px;gap:22px;}
  .cta-actions{width:100%;flex-wrap:wrap;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:575px){
  .container,.container-sm,.container-md,.container-lg,.container-xl{padding-left:20px;padding-right:20px;}
  body{font-size:15px;}
  .nav-inner{gap:12px;}
  .brand-sub{display:none;}
  .btn-cta{height:44px;padding:0 18px;font-size:14px;}
  .page-banner{padding:104px 0 44px;}
  .banner-lead{font-size:15px;}
  .alt-section,.faq-section{padding:56px 0;}
  .quick-section{padding:56px 0;}
  .cta-section{padding:0 0 56px;}
  .quick-grid{grid-template-columns:1fr;}
  .cta-actions{flex-direction:column;align-items:stretch;}
  .btn-primary-solid,.btn-ghost{width:100%;height:48px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .site-footer{padding:48px 0 24px;}
  .accordion-button{font-size:16px;padding-right:40px;}
  .accordion-body{padding-right:0;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .to-top{right:16px;bottom:16px;}
}

/* roulang page: category3 */
:root{
  --bs-primary:#1450B4;
  --bs-primary-rgb:20,80,180;
  --bs-body-color:#10233F;
  --bs-body-bg:#F7FAFE;
  --bs-border-color:#E2EAF5;
  --bs-border-radius:10px;
  --bs-font-sans-serif:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,sans-serif;
  --bs-link-color:#1450B4;
  --bs-link-hover-color:#F26B21;

  --brand:#1450B4;
  --brand-bright:#2A73E8;
  --brand-light:#EDF3FC;
  --brand-deep:#0D2C5E;
  --accent:#F26B21;
  --accent-dark:#D95A14;
  --teal:#12A594;
  --danger:#D9433F;
  --page:#F7FAFE;
  --surface:#FFFFFF;
  --text:#10233F;
  --text-2:#5C6E88;
  --text-3:#8A98AD;
  --line:#E2EAF5;

  --r-btn:10px;
  --r-pill:999px;
  --r-card:16px;
  --r-block:20px;
  --r-big:24px;

  --sh-1:0 6px 20px rgba(13,44,94,.06);
  --sh-2:0 14px 32px rgba(13,44,94,.10);
  --sh-3:0 20px 44px rgba(13,44,94,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sec-pad:96px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{list-style:none;padding:0}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--accent)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:32px;padding-right:32px}
@media (min-width:1400px){.container{max-width:1280px}}
.nums{font-variant-numeric:tabular-nums lining-nums}

/* ---------- buttons ---------- */
.btn-main,.btn-ghost,.btn-glass{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15.5px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.btn-main{background:var(--accent);color:#fff;box-shadow:0 10px 22px rgba(242,107,33,.22)}
.btn-main:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 14px 26px rgba(242,107,33,.28)}
.btn-main:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:transparent;color:var(--brand);border-color:rgba(20,80,180,.35)}
.btn-ghost:hover{background:rgba(20,80,180,.08);color:var(--brand);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-glass{background:rgba(255,255,255,.18);color:#fff;border-color:rgba(255,255,255,.55);backdrop-filter:blur(6px)}
.btn-glass:hover{background:rgba(255,255,255,.3);color:#fff}
.btn-main:disabled,.btn-ghost:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}
.btn-lg{height:52px;padding:0 30px}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1030;
  background:rgba(255,255,255,.72);
  backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid rgba(20,80,180,.10);
  box-shadow:0 8px 24px rgba(13,44,94,.06);
  transition:background-color .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.site-header.is-stuck{background:rgba(255,255,255,.94);border-bottom-color:var(--line);box-shadow:0 10px 28px rgba(13,44,94,.12)}
.nav-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:12px;color:var(--text);flex-shrink:0}
.brand:hover{color:var(--brand)}
.brand-mark{width:28px;height:28px;color:var(--brand);flex-shrink:0}
.brand-text{display:flex;flex-direction:column;line-height:1.16}
.brand-name{font-size:17px;font-weight:700;letter-spacing:-.01em}
.brand-sub{font-size:11px;font-weight:500;letter-spacing:.2em;color:var(--text-3)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.main-nav a{
  display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:var(--r-pill);
  font-size:15px;font-weight:500;color:var(--text-2);
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.main-nav a:hover{color:var(--brand);background:rgba(20,80,180,.07)}
.main-nav a.active{color:var(--brand);background:var(--brand-light);font-weight:600}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.icon-btn{
  width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--text-2);
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:rgba(20,80,180,.35);background:var(--brand-light)}
.btn-cta{
  display:inline-flex;align-items:center;height:44px;padding:0 22px;border-radius:var(--r-btn);
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;
  box-shadow:0 8px 18px rgba(242,107,33,.24);
  transition:background-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-cta:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 22px rgba(242,107,33,.3)}
.burger{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;
  cursor:pointer;position:relative;
}
.burger span,.burger span::before,.burger span::after{
  position:absolute;left:50%;transform:translateX(-50%);
  width:18px;height:2px;background:var(--text);border-radius:2px;content:"";
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.burger span{top:50%;margin-top:-1px}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.burger.is-open span{background:transparent}
.burger.is-open span::before{transform:translateX(-50%) rotate(45deg);top:0}
.burger.is-open span::after{transform:translateX(-50%) rotate(-45deg);top:0}

/* ---------- page head ---------- */
.page-head{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#EDF3FC 0%,#F7FAFE 100%);
  padding:150px 0 76px;
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(20,80,180,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(20,80,180,.07) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.7),rgba(0,0,0,0));
  mask-image:linear-gradient(180deg,rgba(0,0,0,.7),rgba(0,0,0,0));
}
.page-head .container{position:relative;z-index:1}
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-3);margin-bottom:22px;flex-wrap:wrap}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--brand)}
.crumb span{color:var(--text-3)}
.page-head h1{font-size:clamp(28px,4vw,42px);font-weight:700;line-height:1.25;letter-spacing:-.02em;max-width:860px}
.lede{margin-top:18px;font-size:17px;line-height:1.8;color:var(--text-2);max-width:680px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--brand-light);color:var(--brand);font-size:13px;font-weight:500;
}
.tag.tag-accent{background:rgba(242,107,33,.1);color:var(--accent-dark)}
.tag.tag-teal{background:rgba(18,165,148,.1);color:#0E8578}

/* ---------- sections ---------- */
.section{padding:var(--sec-pad) 0}
.section-white{background:var(--surface)}
.sec-head{max-width:760px}
.sec-head h2{font-size:clamp(24px,3vw,32px);font-weight:700;line-height:1.32;letter-spacing:-.01em;padding-left:16px;position:relative}
.sec-head h2::before{content:"";position:absolute;left:0;top:.28em;width:4px;height:22px;border-radius:2px;background:var(--brand)}
.sec-head p{margin-top:14px;color:var(--text-2);font-size:16px}

/* ---------- timeline ---------- */
.timeline{position:relative;margin-top:44px;padding-left:38px}
.timeline::before{
  content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--brand),rgba(20,80,180,.12));
}
.tl-item{position:relative;padding-bottom:34px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{
  position:absolute;left:-38px;top:5px;width:20px;height:20px;border-radius:50%;
  background:var(--brand-light);display:flex;align-items:center;justify-content:center;
}
.tl-dot::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--brand);transition:background-color .22s var(--ease)}
.tl-item:hover .tl-dot::after{background:var(--accent)}
.tl-item.is-current .tl-dot::after{background:var(--accent)}
.tl-item h3{font-size:18px;font-weight:600;line-height:1.45;margin-bottom:8px}
.tl-item p{font-size:15px;line-height:1.78;color:var(--text-2);margin-bottom:6px}
.tl-item p:last-of-type{margin-bottom:12px}
.link-inline{font-weight:500;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.link-inline:hover{color:var(--accent)}
.arrow-link{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);
  transition:color .2s var(--ease),gap .2s var(--ease);
}
.arrow-link:hover{color:var(--accent);gap:10px}
.arrow-link svg{width:14px;height:14px}

/* ---------- split block ---------- */
.split{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center}
.split-media{position:relative;border-radius:var(--r-block);overflow:hidden;box-shadow:var(--sh-2);background:var(--brand-light)}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.split-body h2{font-size:clamp(23px,2.6vw,30px);font-weight:700;line-height:1.34;letter-spacing:-.01em}
.split-body p{margin-top:16px;color:var(--text-2);font-size:16px}
.point-list{margin-top:22px;display:flex;flex-direction:column;gap:14px}
.point-list li{display:flex;gap:12px;font-size:15px;line-height:1.7;color:var(--text-2)}
.point-list li strong{color:var(--text);font-weight:600}
.point-icon{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--brand-light);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;margin-top:3px;
}

/* ---------- faq ---------- */
.faq-grid{margin-top:44px}
.accordion-item{background:transparent;border:0;border-top:1px solid var(--line)}
.accordion-item:last-child{border-bottom:1px solid var(--line)}
.accordion-button{
  position:relative;background:transparent;border:0;border-radius:0!important;
  padding:22px 44px 22px 0;font-size:17px;font-weight:600;color:var(--text);
  line-height:1.55;box-shadow:none;
  transition:color .2s var(--ease);
}
.accordion-button:not(.collapsed){background:transparent;color:var(--brand);box-shadow:none}
.accordion-button:hover{color:var(--brand)}
.accordion-button:focus{box-shadow:none;outline:2px solid var(--brand);outline-offset:-2px}
.accordion-button::after{
  content:"";position:absolute;right:4px;top:50%;width:14px;height:14px;
  background-color:transparent;background-image:linear-gradient(currentColor,currentColor),linear-gradient(currentColor,currentColor);
  background-size:14px 1.5px,1.5px 14px;background-position:center;background-repeat:no-repeat;
  color:var(--text-3);transform:translateY(-50%);
  transition:transform .24s var(--ease),color .24s var(--ease);
}
.accordion-button:not(.collapsed)::after{transform:translateY(-50%) rotate(45deg);color:var(--accent)}
.accordion-body{padding:0 44px 22px 0;font-size:15px;line-height:1.85;color:var(--text-2)}

/* ---------- cta bar ---------- */
.cta-bar{
  background:var(--brand-light);border:1px solid rgba(20,80,180,.12);border-radius:var(--r-block);
  padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  box-shadow:var(--sh-1);
}
.cta-bar h2{font-size:22px;font-weight:700;line-height:1.4}
.cta-bar p{margin-top:8px;font-size:15px;color:var(--text-2);max-width:620px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-deep);color:rgba(255,255,255,.72);padding:72px 0 32px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:44px}
.footer-brand{display:flex;align-items:center;gap:12px;color:#fff;margin-bottom:16px}
.footer-brand .brand-mark{color:#7FA7E8}
.footer-brand .brand-sub{color:rgba(255,255,255,.5)}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:280px}
.footer-col h4{font-size:15px;font-weight:600;color:rgba(255,255,255,.85);margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.65);transition:color .2s var(--ease),transform .2s var(--ease);display:inline-block}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-col p{font-size:14px;color:rgba(255,255,255,.65);margin-bottom:10px;line-height:1.7}
.footer-bottom{
  margin-top:52px;padding-top:24px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.5);
}
#toTop{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;border:0;
  background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;
  cursor:pointer;z-index:1040;opacity:0;visibility:hidden;transform:translateY(8px);
  box-shadow:var(--sh-2);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease),background-color .2s var(--ease);
}
#toTop.show{opacity:1;visibility:visible;transform:none}
#toTop:hover{background:var(--brand-bright)}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .split{gap:40px}
}
@media (max-width:991px){
  :root{--sec-pad:72px}
  .container{padding-left:24px;padding-right:24px}
  .nav-inner{height:64px;gap:16px}
  .main-nav{
    position:fixed;top:64px;left:0;right:0;bottom:auto;display:none;
    flex-direction:column;align-items:stretch;gap:2px;margin-left:0;
    background:#fff;padding:14px 20px 26px;border-radius:0 0 24px 24px;
    box-shadow:0 20px 40px rgba(13,44,94,.14);max-height:calc(100vh - 64px);overflow-y:auto;
  }
  .main-nav.open{display:flex}
  .main-nav a{height:56px;font-size:18px;font-weight:600;border-radius:12px;padding:0 16px}
  .nav-actions{margin-left:auto}
  .nav-actions .icon-btn{display:none}
  .burger{display:block}
  .page-head{padding:130px 0 64px}
  .split{grid-template-columns:1fr;gap:32px}
  .split-media{order:-1}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  .cta-bar{padding:28px 24px;flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn-main,.cta-actions .btn-ghost{flex:1}
}
@media (max-width:575px){
  :root{--sec-pad:56px}
  .container{padding-left:20px;padding-right:20px}
  .lede{font-size:16px}
  .timeline{padding-left:32px}
  .tl-dot{left:-32px;width:18px;height:18px}
  .timeline::before{left:8px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .btn-main,.btn-ghost,.btn-glass{height:44px;width:100%}
  .cta-actions{flex-direction:column}
  .footer-bottom{flex-direction:column;gap:8px}
  #toTop{right:16px;bottom:16px}
}