/* roulang page: index */
:root{
  --brand:#2563A8;
  --brand-dark:#17497D;
  --brand-light:#E8F0FA;
  --brand-50:#F4F7FB;
  --teal:#0E9B8A;
  --teal-light:#E6F5F2;
  --cta:#E4791F;
  --cta-hover:#C9631A;
  --text:#16222E;
  --text-2:#4B5C6B;
  --text-3:#7C8B99;
  --border:#E2E8F0;
  --border-soft:#E6ECF3;
  --divider:#EDF2F7;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --success:#0E9B8A;
  --warn:#D98416;
  --danger:#C0392B;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(23,60,110,.06);
  --sh-2:0 12px 28px rgba(23,60,110,.12);
  --sh-3:0 20px 48px rgba(23,60,110,.16);
  --maxw:1200px;
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  text-align:left;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--brand);text-decoration:none;transition:color .15s ease,border-color .15s ease,background-color .15s ease;}
a:hover{color:var(--brand-dark);}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px;}
@media (min-width:1024px){.container{padding:0 32px;}}
@media (min-width:1536px){:root{--maxw:1280px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  height:var(--nav-h);
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.6);
  box-shadow:0 8px 24px rgba(20,60,110,.08);
  transition:height .2s ease-out,background-color .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.site-header.is-scrolled{
  height:60px;
  background:rgba(255,255,255,.96);
  border-bottom-color:var(--border);
  box-shadow:0 6px 18px rgba(23,60,110,.10);
  -webkit-backdrop-filter:none;backdrop-filter:none;
}
.nav-inner{height:100%;display:flex;align-items:center;gap:24px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(150deg,var(--brand),var(--brand-dark));
  color:#fff;font-weight:700;font-size:17px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 14px rgba(37,99,168,.28);
  letter-spacing:-.5px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-main{font-size:16px;font-weight:700;color:var(--text);letter-spacing:.2px;}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:2px;}
.nav-links{display:none;align-items:center;gap:4px;margin-left:auto;}
.nav-links a{
  display:inline-block;padding:8px 12px;border-radius:var(--r-btn);
  font-size:14.5px;font-weight:500;color:var(--text-2);
  white-space:nowrap;
}
.nav-links a:hover{color:var(--brand);background:var(--brand-50);}
.nav-links a.active{color:var(--brand);background:var(--brand-light);font-weight:600;}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto;}
.nav-help{display:none;font-size:14px;color:var(--text-2);font-weight:500;}
.nav-help:hover{color:var(--brand);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--r-btn);
  padding:11px 20px;font-size:15px;font-weight:600;line-height:1.2;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.btn-primary{background:var(--cta);color:#fff;box-shadow:0 6px 16px rgba(228,121,31,.26);}
.btn-primary:hover{background:var(--cta-hover);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--brand);border-color:#C9D9EC;}
.btn-ghost:hover{background:var(--brand-50);border-color:var(--brand);color:var(--brand-dark);}
.btn-subtle{background:transparent;color:var(--brand);border-color:transparent;padding-left:6px;padding-right:6px;}
.btn-subtle:hover{color:var(--brand-dark);text-decoration:underline;}
.btn:disabled,.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;}
.btn-sm{padding:9px 16px;font-size:14px;}
.nav-cta{display:none;}
.burger{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;border:1px solid var(--border);border-radius:var(--r-btn);
  background:#fff;align-items:center;padding:0;
}
.burger span{display:block;width:18px;height:2px;background:var(--text-2);border-radius:2px;transition:transform .2s ease,opacity .2s ease;}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

@media (min-width:1024px){
  .nav-links{display:flex;}
  .nav-help{display:inline-block;}
  .nav-cta{display:inline-flex;}
  .burger{display:none;}
  .nav-right{margin-left:0;}
}

/* 移动端抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,40,70,.35);opacity:0;visibility:hidden;
  transition:opacity .24s ease,visibility .24s ease;z-index:130;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(84vw,320px);z-index:140;
  background:#fff;box-shadow:var(--sh-3);
  transform:translateX(102%);transition:transform .24s ease;
  padding:22px 20px;display:flex;flex-direction:column;gap:6px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-title{font-size:13px;color:var(--text-3);letter-spacing:1px;margin:6px 0 8px;}
.drawer a{
  display:block;padding:12px 12px;border-radius:var(--r-btn);
  font-size:15.5px;color:var(--text-2);font-weight:500;border:1px solid transparent;
}
.drawer a:hover{background:var(--brand-50);color:var(--brand);}
.drawer a.active{background:var(--brand-light);color:var(--brand);font-weight:600;}
.drawer .btn{width:100%;margin-top:14px;}

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:calc(var(--nav-h) + 56px) 0 64px;
  background:
    linear-gradient(180deg,rgba(244,247,251,.94) 0%,rgba(246,248,251,.98) 100%),
    url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(37,99,168,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,168,.05) 1px,transparent 1px);
  background-size:44px 44px;
  pointer-events:none;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 78%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 78%);
}
.hero .container{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-pill);
  padding:6px 14px;font-size:13px;color:var(--text-2);font-weight:500;
  box-shadow:var(--sh-1);
}
.eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--teal);display:inline-block;}
.hero h1{
  margin-top:18px;
  font-size:28px;line-height:1.3;font-weight:700;letter-spacing:-.2px;color:var(--text);
}
.hero h1 em{font-style:normal;color:var(--brand);}
.hero-lead{
  margin-top:16px;font-size:16.5px;line-height:1.8;color:var(--text-2);max-width:40ch;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--teal-light);color:#0A7A6C;
  border-radius:var(--r-pill);padding:6px 13px;font-size:13px;font-weight:500;
}
.tag svg{width:14px;height:14px;flex:0 0 auto;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;height:240px;object-fit:cover;border-radius:16px;
  box-shadow:var(--sh-2);border:1px solid #fff;
}
.hero-panel{
  position:relative;margin-top:-38px;margin-left:16px;margin-right:16px;
  background:#fff;border:1px solid var(--border-soft);border-radius:var(--r-card);
  box-shadow:var(--sh-2);padding:18px 20px;
}
.hero-panel h3{font-size:15px;font-weight:600;color:var(--text);}
.hero-panel ol{counter-reset:step;margin-top:10px;display:grid;gap:8px;}
.hero-panel li{
  counter-increment:step;position:relative;padding-left:30px;
  font-size:14px;color:var(--text-2);
}
.hero-panel li::before{
  content:counter(step,decimal-leading-zero);
  position:absolute;left:0;top:2px;
  font-size:12px;font-weight:700;color:var(--brand);
  background:var(--brand-light);border-radius:6px;padding:1px 6px;
  font-variant-numeric:tabular-nums;
}
@media (min-width:768px){
  .hero{padding:calc(var(--nav-h) + 68px) 0 80px;}
  .hero h1{font-size:34px;}
  .hero-visual img{height:320px;}
}
@media (min-width:1024px){
  .hero{padding:calc(var(--nav-h) + 76px) 0 96px;}
  .hero-grid{grid-template-columns:1.05fr .95fr;gap:52px;}
  .hero h1{font-size:42px;line-height:1.25;}
  .hero-lead{font-size:18px;line-height:1.7;}
  .hero-visual img{height:380px;}
  .hero-panel{margin:18px 0 0 -26px;margin-right:26px;}
}

/* ============ 通用板块 ============ */
.section{padding:56px 0;}
.section-alt{background:#fff;}
.section-tint{background:linear-gradient(180deg,#fff 0%,var(--brand-50) 100%);}
.section-head{max-width:720px;}
.section-head .kicker{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:2px;
  color:var(--brand);text-transform:uppercase;margin-bottom:10px;
  font-variant-numeric:tabular-nums;
}
.section-head h2{font-size:24px;line-height:1.35;font-weight:700;color:var(--text);}
.section-head p{margin-top:12px;font-size:15.5px;line-height:1.8;color:var(--text-2);}
.section-foot{margin-top:34px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;}
.link-more{font-size:15px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.link-more:hover{color:var(--brand-dark);text-decoration:underline;}
@media (min-width:768px){.section{padding:72px 0;}.section-head h2{font-size:28px;}}
@media (min-width:1024px){.section{padding:92px 0;}.section-head h2{font-size:31px;}}

/* ============ 卖点错落栅格 ============ */
.feature-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:36px;}
.card{
  background:var(--card);border:1px solid var(--border-soft);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:24px;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(37,99,168,.3);}
.card-icon{
  width:44px;height:44px;border-radius:12px;background:var(--brand-light);
  display:flex;align-items:center;justify-content:center;color:var(--brand);
}
.card-icon svg{width:22px;height:22px;}
.feature-main{display:flex;flex-direction:column;gap:16px;}
.feature-main h3{font-size:21px;font-weight:700;line-height:1.4;color:var(--text);}
.feature-main p{font-size:15.5px;line-height:1.8;color:var(--text-2);}
.feature-main img{height:190px;width:100%;object-fit:cover;}
.mini-list{display:grid;gap:12px;margin-top:18px;}
.mini-list li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2);line-height:1.7;}
.mini-list li b{color:var(--text);font-weight:600;}
.dot{width:6px;height:6px;border-radius:50%;background:var(--brand);flex:0 0 auto;margin-top:9px;}
.feature-side{display:grid;gap:20px;align-content:start;}
.feature-side .card h4{font-size:17px;font-weight:600;margin-top:14px;color:var(--text);}
.feature-side .card p{margin-top:8px;font-size:14.5px;line-height:1.75;color:var(--text-2);}
@media (min-width:768px){
  .feature-side{grid-template-columns:1fr 1fr;}
}
@media (min-width:1024px){
  .feature-grid{grid-template-columns:1.15fr .85fr;gap:24px;margin-top:44px;}
  .feature-side{grid-template-columns:1fr;}
}

/* ============ 时间轴 ============ */
.timeline{margin-top:40px;position:relative;display:grid;gap:0;}
.tl-item{position:relative;padding:0 0 28px 54px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:15px;top:34px;bottom:0;width:1px;background:var(--border);
}
.tl-item:last-child::before{display:none;}
.tl-num{
  position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;
  background:#fff;border:1.5px solid var(--brand);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;
  box-shadow:0 0 0 4px #fff;
}
.tl-body{background:#fff;border:1px solid var(--border-soft);border-radius:var(--r-card);padding:20px 22px;box-shadow:var(--sh-1);transition:box-shadow .2s ease,border-color .2s ease,transform .2s ease;}
.tl-body:hover{box-shadow:var(--sh-2);border-color:rgba(37,99,168,.28);transform:translateY(-2px);}
.tl-body h3{font-size:17px;font-weight:600;color:var(--text);}
.tl-body p{margin-top:8px;font-size:14.5px;line-height:1.75;color:var(--text-2);}
.tl-meta{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  font-size:12.5px;color:var(--text-2);background:var(--divider);
  border-radius:var(--r-pill);padding:4px 11px;
}
.chip-teal{background:var(--teal-light);color:#0A7A6C;}
@media (min-width:1024px){
  .timeline{grid-template-columns:repeat(4,1fr);gap:24px;}
  .tl-item{padding:64px 0 0 0;}
  .tl-item::before{left:36px;top:15px;bottom:auto;width:calc(100% + 24px);height:1px;}
  .tl-item:last-child::before{display:block;width:0;}
}

/* ============ CMS 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:1fr;gap:22px;margin-top:36px;}
.news-card{
  background:#fff;border:1px solid var(--border-soft);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(37,99,168,.3);}
.news-cover{position:relative;display:block;aspect-ratio:16/10;overflow:hidden;background:var(--divider);}
.news-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .35s ease-out;}
.news-card:hover .news-cover img{transform:scale(1.04);}
.news-cover::after{content:"";position:absolute;inset:0;background:rgba(20,60,110,.18);}
.news-badge{
  position:absolute;left:14px;top:14px;z-index:2;
  background:rgba(255,255,255,.94);color:var(--brand);
  font-size:12.5px;font-weight:600;border-radius:var(--r-pill);padding:5px 12px;
  box-shadow:var(--sh-1);
}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.news-body h3{font-size:17px;font-weight:600;line-height:1.5;color:var(--text);}
.news-body h3 a{color:inherit;display:block;}
.news-body h3 a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px;}
.news-body p{
  margin-top:10px;font-size:14.5px;line-height:1.75;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:18px;padding-top:14px;border-top:1px solid var(--divider);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.news-date{font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;}
.news-foot .link-more{font-size:14px;}
.empty-state{
  margin-top:36px;background:#fff;border:1px dashed var(--border);border-radius:var(--r-card);
  padding:48px 24px;text-align:center;box-shadow:var(--sh-1);
}
.empty-state svg{width:28px;height:28px;color:var(--text-3);margin:0 auto 12px;}
.empty-state p{font-size:15px;color:var(--text-2);}
.empty-state .btn{margin-top:18px;}
@media (min-width:640px){.news-grid{grid-template-columns:1fr 1fr;}}
@media (min-width:1024px){
  .news-grid{grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px;}
  .news-grid > .news-card:first-child{grid-column:span 2;}
  .news-grid > .news-card:first-child .news-cover{aspect-ratio:21/9;}
}

/* ============ 社会认同 ============ */
.proof-grid{display:grid;grid-template-columns:1fr;gap:22px;margin-top:38px;}
.stat-band{
  display:grid;grid-template-columns:repeat(2,1fr);gap:1px;
  background:var(--border);border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;
}
.stat{background:#fff;padding:22px 20px;}
.stat b{display:block;font-size:26px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1.2;}
.stat span{display:block;margin-top:6px;font-size:13.5px;color:var(--text-2);}
.quote-card{display:flex;flex-direction:column;gap:14px;}
.quote-card p{font-size:15px;line-height:1.85;color:var(--text-2);}
.quote-who{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--divider);}
.quote-avatar{
  width:38px;height:38px;border-radius:50%;background:var(--brand-light);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;
}
.quote-who strong{display:block;font-size:14.5px;color:var(--text);}
.quote-who small{display:block;font-size:12.5px;color:var(--text-3);}
@media (min-width:768px){
  .proof-grid{grid-template-columns:1.1fr .9fr .9fr;}
  .stat-band{grid-template-columns:repeat(2,1fr);}
}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:1fr;gap:26px;margin-top:36px;}
.faq-intro h2{font-size:24px;line-height:1.35;font-weight:700;}
.faq-intro p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--text-2);}
.faq-list{background:#fff;border:1px solid var(--border-soft);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;}
.faq-item + .faq-item{border-top:1px solid var(--divider);}
.faq-q{
  width:100%;background:transparent;border:0;text-align:left;
  padding:18px 20px;display:flex;gap:14px;align-items:flex-start;
  font-size:15.5px;font-weight:600;color:var(--text);line-height:1.6;
  border-left:3px solid transparent;transition:background-color .18s ease,border-color .18s ease;
}
.faq-q:hover{background:var(--brand-50);}
.faq-item.is-open .faq-q{border-left-color:var(--brand);color:var(--brand-dark);}
.faq-sign{
  margin-left:auto;flex:0 0 auto;width:20px;height:20px;position:relative;top:3px;
  transition:transform .18s ease;color:var(--brand);
}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
}
.faq-sign::before{left:2px;right:2px;top:9px;height:2px;}
.faq-sign::after{top:2px;bottom:2px;left:9px;width:2px;transition:transform .18s ease;}
.faq-item.is-open .faq-sign{transform:rotate(180deg);}
.faq-item.is-open .faq-sign::after{transform:scaleY(0);}
.faq-a{display:none;padding:0 20px 20px 20px;font-size:14.8px;line-height:1.8;color:var(--text-2);}
.faq-item.is-open .faq-a{display:block;}
@media (min-width:1024px){
  .faq-wrap{grid-template-columns:minmax(240px,1fr) 2fr;gap:48px;margin-top:44px;}
}

/* ============ 底部 CTA + 表单 ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:18px;
  background:linear-gradient(135deg,#EAF2FB 0%,#F4F7FB 100%);
  border:1px solid #CFE0F3;box-shadow:var(--sh-1);
  padding:32px 24px;
}
.cta-band::before{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(37,99,168,.14),transparent 68%);
}
.cta-grid{position:relative;display:grid;grid-template-columns:1fr;gap:28px;}
.cta-copy h2{font-size:24px;line-height:1.35;font-weight:700;color:var(--brand-dark);}
.cta-copy p{margin-top:12px;font-size:15.5px;line-height:1.8;color:var(--text-2);}
.cta-points{margin-top:20px;display:grid;gap:10px;}
.cta-points li{font-size:14.5px;color:var(--text-2);display:flex;gap:10px;align-items:flex-start;}
.form-card{
  background:#fff;border:1px solid var(--border-soft);border-radius:var(--r-card);
  box-shadow:var(--sh-2);padding:24px 22px;
}
.form-card h3{font-size:17px;font-weight:600;color:var(--text);}
.form-card > p{margin-top:8px;font-size:13.8px;color:var(--text-3);line-height:1.7;}
.field{margin-top:16px;}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--text-2);margin-bottom:6px;}
.field input,.field textarea{
  width:100%;height:44px;padding:0 13px;border:1px solid var(--border);border-radius:var(--r-input);
  background:#fff;font-size:14.5px;color:var(--text);transition:border-color .16s ease,box-shadow .16s ease;
}
.field textarea{height:auto;min-height:92px;padding:11px 13px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:#A9B6C2;}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(37,99,168,.32);
}
.field .err{display:none;margin-top:6px;font-size:13px;color:var(--danger);}
.field.has-error input,.field.has-error textarea{border-color:var(--danger);}
.field.has-error .err{display:block;}
.form-card .btn{width:100%;margin-top:20px;}
.form-tip{margin-top:12px;font-size:12.8px;color:var(--text-3);line-height:1.7;}
.form-ok{
  display:none;margin-top:14px;background:var(--teal-light);color:#0A7A6C;
  border-radius:var(--r-input);padding:11px 14px;font-size:13.8px;
}
.form-ok.is-show{display:block;}
@media (min-width:1024px){
  .cta-band{padding:48px 44px;}
  .cta-grid{grid-template-columns:1.1fr .9fr;gap:44px;align-items:start;}
  .cta-copy h2{font-size:28px;}
}

/* ============ 页脚 ============ */
.site-footer{background:#0F2A45;color:#C7D5E4;padding:52px 0 0;margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
.footer-brand .brand-main{color:#fff;font-size:16.5px;}
.footer-brand .brand-mark{background:linear-gradient(150deg,#2F7FC4,#1B5C93);}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:#9FB4C9;max-width:36ch;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;letter-spacing:.5px;margin-bottom:14px;}
.footer-col li + li{margin-top:10px;}
.footer-col a{font-size:14px;color:#A9BDD1;}
.footer-col a:hover{color:#fff;}
.footer-col p{font-size:14px;color:#9FB4C9;line-height:1.85;}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:10px 20px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:#8CA3BA;
}
.footer-bottom span{font-variant-numeric:tabular-nums;}
@media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:28px;}}

/* ============ 移动端固定条 / 返回顶部 ============ */
.mobile-bar{
  display:flex;position:fixed;left:0;right:0;bottom:0;z-index:110;
  height:56px;background:rgba(255,255,255,.98);border-top:1px solid var(--border);
  box-shadow:0 -8px 20px rgba(23,60,110,.10);
  align-items:center;gap:14px;padding:0 16px calc(0px + env(safe-area-inset-bottom));
}
.mobile-bar p{font-size:13.5px;color:var(--text-2);line-height:1.4;}
.mobile-bar strong{display:block;font-size:14px;color:var(--text);}
.mobile-bar .btn{margin-left:auto;flex:0 0 auto;}
@media (min-width:768px){.mobile-bar{display:none;}}
.back-top{
  position:fixed;right:18px;bottom:74px;z-index:115;
  width:48px;height:48px;border-radius:50%;
  background:#fff;border:1px solid #C9D9EC;color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;
  transition:opacity .22s ease,visibility .22s ease,transform .18s ease;
}
.back-top.is-show{opacity:1;visibility:visible;}
.back-top:hover{transform:translateY(-3px);color:var(--brand-dark);}
@media (min-width:768px){.back-top{bottom:26px;}}
body{padding-bottom:56px;}
@media (min-width:768px){body{padding-bottom:0;}}

/* roulang page: article */
:root{
  --brand:#2563A8;
  --brand-dark:#17497D;
  --brand-light:#E8F0FA;
  --brand-tint:#F4F7FB;
  --teal:#0E9B8A;
  --teal-light:#E6F5F2;
  --cta:#E4791F;
  --cta-hover:#C9631A;
  --text:#16222E;
  --text-2:#4B5C6B;
  --text-3:#7C8B99;
  --border:#E2E8F0;
  --border-soft:#E6ECF3;
  --divider:#EDF2F7;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --danger:#C0392B;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 2px 8px rgba(23,60,110,.06);
  --shadow-2:0 12px 28px rgba(23,60,110,.12);
  --shadow-3:0 20px 48px rgba(23,60,110,.16);
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{border:0;background:none;cursor:pointer;padding:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
figure{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:var(--brand-light);color:var(--brand-dark)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 32px}}
@media (min-width:1536px){.container{max-width:1280px}}

/* ============ 导航 ============ */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:70;
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.6);
  box-shadow:0 8px 24px rgba(20,60,110,.08);
  transition:background .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.96);
  border-bottom-color:var(--border);
  box-shadow:0 6px 18px rgba(23,60,110,.10);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:18px;
  height:72px;
  transition:height .2s ease-out;
}
.site-header.is-scrolled .header-inner{height:60px}

.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;
  display:grid;place-items:center;
  border-radius:11px;
  background:linear-gradient(140deg,#2563A8,#17497D);
  color:#fff;font-weight:700;font-size:18px;letter-spacing:.5px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand-main{font-size:15px;font-weight:700;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-sub{font-size:12px;color:var(--text-3);letter-spacing:.08em}

.nav-links{display:none}
@media (min-width:1024px){
  .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
  .nav-links a{
    padding:8px 13px;border-radius:10px;
    font-size:15px;font-weight:500;color:var(--text-2);
    transition:color .18s ease,background .18s ease;
    white-space:nowrap;
  }
  .nav-links a:hover{color:var(--brand);background:var(--brand-light)}
  .nav-links a.active{color:var(--brand-dark);background:var(--brand-light);font-weight:600}
}

.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
@media (min-width:1024px){.header-actions{margin-left:12px}}
.header-link{display:none}
@media (min-width:768px){
  .header-link{
    display:inline-flex;align-items:center;
    font-size:14px;color:var(--text-2);padding:8px 10px;border-radius:8px;
    transition:color .18s ease;
  }
  .header-link:hover{color:var(--brand)}
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);
  font-weight:600;
  letter-spacing:.01em;
  padding:11px 22px;
  font-size:15px;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;
  border:1px solid transparent;
  white-space:nowrap;
}
.btn-primary{background:var(--cta);color:#fff;box-shadow:0 6px 16px rgba(228,121,31,.24)}
.btn-primary:hover{background:var(--cta-hover);transform:translateY(-1px);box-shadow:0 10px 22px rgba(228,121,31,.28)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:#fff;color:var(--brand-dark);border-color:#C9D8EA}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-light)}
.btn-ghost{background:var(--brand-light);color:var(--brand-dark)}
.btn-ghost:hover{background:#DCE9F8}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-block{width:100%}

.nav-toggle{
  width:42px;height:42px;border-radius:10px;
  display:grid;place-items:center;
  border:1px solid var(--border);
  background:#fff;color:var(--brand-dark);
}
.nav-toggle:hover{background:var(--brand-light)}
@media (min-width:1024px){.nav-toggle{display:none}}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

.drawer-overlay{
  position:fixed;inset:0;background:rgba(20,40,70,.35);
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;z-index:80;
}
.drawer-overlay.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:280px;max-width:84vw;
  background:#fff;z-index:90;
  transform:translateX(100%);
  transition:transform .24s ease;
  display:flex;flex-direction:column;
  box-shadow:-16px 0 40px rgba(23,60,110,.16);
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--divider)}
.drawer-close{width:36px;height:36px;border-radius:9px;display:grid;place-items:center;color:var(--text-2);border:1px solid var(--border)}
.drawer-close:hover{background:var(--brand-light);color:var(--brand)}
.drawer-nav{padding:14px 12px;display:flex;flex-direction:column;gap:4px}
.drawer-nav a{padding:12px 14px;border-radius:10px;color:var(--text-2);font-weight:500}
.drawer-nav a:hover,.drawer-nav a.active{background:var(--brand-light);color:var(--brand-dark)}
.drawer-foot{margin-top:auto;padding:20px;border-top:1px solid var(--divider);display:flex;flex-direction:column;gap:10px}

/* ============ 页面主体 ============ */
.page-main{padding-top:72px}
@media (max-width:1023px){.page-main{padding-top:72px}}

.crumb-bar{
  background:linear-gradient(180deg,#FFFFFF 0%,var(--brand-tint) 100%);
  border-bottom:1px solid var(--divider);
}
.crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  padding:18px 0;font-size:13.5px;color:var(--text-3);
}
.crumb a{color:var(--text-2);transition:color .18s ease}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#C3CEDA}
.crumb .current{color:var(--brand-dark);font-weight:500;max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.article-hero{
  position:relative;
  padding:36px 0 44px;
  background:
    linear-gradient(rgba(37,99,168,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(37,99,168,.045) 1px,transparent 1px),
    linear-gradient(180deg,#FFFFFF 0%,var(--brand-tint) 100%);
  background-size:32px 32px,32px 32px,100% 100%;
  border-bottom:1px solid var(--divider);
}
.article-hero-inner{max-width:860px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;
  font-size:13px;font-weight:600;letter-spacing:.02em;
}
.chip-brand{background:var(--brand-light);color:var(--brand-dark)}
.chip-teal{background:var(--teal-light);color:#0A7A6C}
.chip-outline{background:#fff;color:var(--text-2);border:1px solid var(--border)}

.article-hero h1{
  margin-top:18px;
  font-size:28px;
  line-height:1.32;
  font-weight:700;
  color:var(--text);
  letter-spacing:-.01em;
}
@media (min-width:768px){.article-hero h1{font-size:36px}}
@media (min-width:1024px){.article-hero h1{font-size:42px;line-height:1.25}}

.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  margin-top:20px;font-size:13.5px;color:var(--text-3);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C3CEDA}
.article-meta .num{font-variant-numeric:tabular-nums;letter-spacing:.02em;color:var(--text-2)}

.layout{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  padding:40px 0 8px;
}
@media (min-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr) 300px;gap:48px;padding:56px 0 12px}
}

.article-card{
  background:var(--card);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:24px 20px;
}
@media (min-width:768px){.article-card{padding:40px 44px}}
@media (min-width:1024px){.article-card{padding:48px 56px}}

.article-body{max-width:760px;font-size:16.5px;line-height:1.8;color:#1F2D3B}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.25em}
.article-body h2{
  position:relative;
  margin:44px 0 16px;
  padding-left:16px;
  font-size:22px;line-height:1.35;font-weight:700;color:var(--text);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:2px;background:var(--brand);
}
@media (min-width:768px){.article-body h2{font-size:26px}}
.article-body h3{margin:32px 0 12px;font-size:20px;line-height:1.4;font-weight:600;color:var(--brand-dark)}
.article-body h4{margin:24px 0 10px;font-size:17px;line-height:1.5;font-weight:600;color:var(--text)}
.article-body ul{margin:0 0 1.25em;padding:0;list-style:none}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:10px}
.article-body ul li::before{content:"";position:absolute;left:4px;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.article-body ol{margin:0 0 1.25em;padding-left:22px;list-style:decimal}
.article-body ol li{margin-bottom:10px;padding-left:6px}
.article-body ol li::marker{color:var(--brand);font-weight:600}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;
  background:var(--brand-light);
  border-left:3px solid var(--brand);
  border-radius:0 12px 12px 0;
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-img);margin:26px auto;box-shadow:var(--shadow-1)}
.article-body figure{margin:26px 0}
.article-body figcaption{margin-top:10px;text-align:center;font-size:13.5px;color:var(--text-3)}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(37,99,168,.35);transition:border-color .18s ease}
.article-body a:hover{border-bottom-color:var(--brand)}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--border);padding:10px 14px;text-align:left}
.article-body th{background:var(--brand-tint);color:var(--brand-dark);font-weight:600}
.article-body code{background:var(--divider);padding:2px 7px;border-radius:6px;font-size:14px}
.article-body hr{border:0;border-top:1px solid var(--divider);margin:32px 0}

.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:12px;
  padding:56px 20px;text-align:center;
  background:linear-gradient(180deg,#FFFFFF 0%,var(--brand-tint) 100%);
  border:1px dashed var(--border);
  border-radius:var(--radius-card);
}
.empty-state svg{color:var(--brand);opacity:.75}
.empty-state p{color:var(--text-2);font-size:15px}

.tag-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:40px;padding-top:24px;border-top:1px solid var(--divider);
}
.tag-row .tag-label{font-size:13.5px;color:var(--text-3);margin-right:2px}
.tag{
  display:inline-flex;align-items:center;
  padding:6px 14px;border-radius:999px;
  font-size:13px;color:var(--text-2);
  background:#fff;border:1px solid var(--border);
  transition:all .18s ease;
}
.tag:hover{color:var(--brand);border-color:rgba(37,99,168,.4);background:var(--brand-light)}

/* ============ 侧栏 ============ */
.side{display:flex;flex-direction:column;gap:20px}
@media (min-width:1024px){.side{position:sticky;top:96px;align-self:start}}
.side-card{
  background:var(--card);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:22px;
}
.side-card h3{
  font-size:16px;font-weight:700;color:var(--text);
  padding-bottom:12px;border-bottom:1px solid var(--divider);
}
.side-list{margin-top:6px}
.side-list li{border-bottom:1px solid var(--divider)}
.side-list li:last-child{border-bottom:0}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 0;font-size:14.5px;color:var(--text-2);
  transition:color .18s ease,padding-left .18s ease;
}
.side-list a:hover{color:var(--brand);padding-left:4px}
.side-list .idx{font-variant-numeric:tabular-nums;font-size:12.5px;color:#A9B6C4;font-weight:600}
.side-note{margin-top:14px;font-size:13.5px;line-height:1.7;color:var(--text-3)}
.side-cta{margin-top:16px}

.side-accent{
  background:linear-gradient(160deg,#F4F7FB 0%,#E8F0FA 100%);
  border-color:#D8E4F3;
}
.side-accent h3{border-bottom-color:#D8E4F3}

/* ============ 相关推荐 ============ */
.section{padding:56px 0}
@media (min-width:768px){.section{padding:72px 0}}
@media (min-width:1024px){.section{padding:88px 0}}

.section-head{max-width:680px;margin-bottom:28px}
.section-head .kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand);letter-spacing:.08em;text-transform:uppercase;
}
.section-head .kicker::before{content:"";width:22px;height:1px;background:var(--brand);opacity:.6}
.section-head h2{margin-top:12px;font-size:24px;line-height:1.3;font-weight:700;color:var(--text)}
@media (min-width:768px){.section-head h2{font-size:30px}}
.section-head p{margin-top:12px;font-size:15.5px;color:var(--text-2)}

.card-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}

.post-card{
  display:flex;flex-direction:column;
  background:var(--card);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(37,99,168,.3)}
.post-card .thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--divider)}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out}
.post-card:hover .thumb img{transform:scale(1.04)}
.post-card .thumb::after{
  content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,60,110,.05),rgba(20,60,110,.18));
}
.post-card .thumb .chip{position:absolute;top:12px;left:12px;z-index:2;background:rgba(255,255,255,.92);color:var(--brand-dark)}
.post-card .body{padding:20px;display:flex;flex-direction:column;flex:1}
.post-card h3{
  font-size:17px;line-height:1.45;font-weight:600;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card:hover h3{color:var(--brand)}
.post-card p{
  margin-top:10px;font-size:14.5px;line-height:1.7;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card .foot{
  margin-top:18px;padding-top:14px;border-top:1px solid var(--divider);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.post-card .foot .num{font-variant-numeric:tabular-nums}
.post-card .foot .go{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600}
.post-card .foot .go svg{transition:transform .2s ease}
.post-card:hover .foot .go svg{transform:translateX(3px)}

/* ============ 返回栏 & CTA ============ */
.back-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 24px;
  background:#fff;border:1px solid var(--border-soft);
  border-radius:var(--radius-card);box-shadow:var(--shadow-1);
}
.back-bar .txt{font-size:14.5px;color:var(--text-2)}
.back-bar .acts{display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--brand);
  border-bottom:1px solid transparent;transition:border-color .18s ease;
}
.text-link:hover{border-bottom-color:var(--brand)}

.cta-section{padding:0 0 72px}
@media (min-width:1024px){.cta-section{padding:0 0 96px}}
.cta-box{
  position:relative;overflow:hidden;
  border-radius:18px;
  border:1px solid #CFE0F2;
  background:linear-gradient(140deg,#F4F7FB 0%,#E8F0FA 100%);
  padding:36px 24px;
}
@media (min-width:768px){.cta-box{padding:48px 56px}}
.cta-box::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  opacity:.14;
}
.cta-box > *{position:relative;z-index:1}
.cta-box h2{font-size:24px;line-height:1.3;font-weight:700;color:var(--brand-dark);max-width:560px}
@media (min-width:768px){.cta-box h2{font-size:30px}}
.cta-box p{margin-top:14px;max-width:620px;font-size:15.5px;line-height:1.75;color:var(--text-2)}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.cta-points .chip{background:rgba(255,255,255,.85);color:var(--brand-dark);border:1px solid #D8E4F3}

/* ============ 页脚 ============ */
.site-footer{
  background:#0F2137;
  color:#B9C8D8;
  padding:56px 0 0;
  font-size:14.5px;
}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:32px;
  padding-bottom:40px;
}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand .brand-main{color:#fff}
.footer-brand .brand-sub{color:#8CA3BA}
.footer-brand .brand-mark{background:linear-gradient(140deg,#2E76BE,#1B5289)}
.footer-brand p{margin-top:16px;line-height:1.8;color:#93A6BB;max-width:340px}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:#B9C8D8;transition:color .15s ease}
.footer-col a:hover{color:#7FB3E6}
.footer-col p{line-height:1.8;color:#93A6BB}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0 28px;
  font-size:13.5px;color:#8CA3BA;
}

/* ============ 返回顶部 & 移动固定条 ============ */
.to-top{
  position:fixed;right:20px;bottom:24px;z-index:60;
  width:48px;height:48px;border-radius:50%;
  background:#fff;border:1px solid #C9D8EA;color:var(--brand);
  display:grid;place-items:center;
  box-shadow:var(--shadow-2);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--brand-light);border-color:var(--brand)}
@media (max-width:767px){.to-top{bottom:76px}}

.mobile-bar{
  display:none;
}
@media (max-width:767px){
  .mobile-bar{
    position:fixed;left:0;right:0;bottom:0;z-index:65;
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    height:56px;padding:0 16px calc(0px + env(safe-area-inset-bottom));
    background:#fff;border-top:1px solid var(--border);
    box-shadow:0 -6px 18px rgba(23,60,110,.10);
  }
  .mobile-bar .txt{font-size:13.5px;color:var(--text-2);line-height:1.3}
  .mobile-bar .btn{padding:9px 16px;font-size:14px}
  body{padding-bottom:56px}
}

/* roulang page: category1 */
:root{
  --brand:#2563A8;
  --brand-dark:#17497D;
  --brand-light:#E8F0FA;
  --brand-tint:#F4F7FB;
  --teal:#0E9B8A;
  --teal-light:#E6F5F2;
  --cta:#E4791F;
  --cta-hover:#C9631A;
  --text:#16222E;
  --text-2:#4B5C6B;
  --text-3:#7C8B99;
  --border:#E2E8F0;
  --border-soft:#E6ECF3;
  --divider:#EDF2F7;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --success:#0E9B8A;
  --warn:#D98416;
  --danger:#C0392B;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 2px 8px rgba(23,60,110,.06);
  --sh-2:0 12px 28px rgba(23,60,110,.12);
  --sh-3:0 20px 48px rgba(23,60,110,.16);
  --container:1200px;
  --nav-h:72px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  padding-top:var(--nav-h);
  text-align:left;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .15s ease;}
a:hover{color:var(--brand-dark);}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);letter-spacing:.2px;}
h1{font-size:40px;line-height:1.25;}
h2{font-size:30px;line-height:1.3;}
h3{font-size:21px;line-height:1.4;font-weight:600;}
h4{font-size:17px;line-height:1.5;font-weight:600;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
@media (min-width:1024px){.container{padding:0 32px;}}
@media (min-width:1536px){.container{max-width:1280px;}}

/* ---------- header / nav ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.6);
  box-shadow:0 8px 24px rgba(20,60,110,.08);
  transition:background .2s ease-out,box-shadow .2s ease-out,height .2s ease-out,border-color .2s ease-out;
}
.site-header.scrolled{
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--border);
  box-shadow:0 6px 18px rgba(23,60,110,.10);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:var(--nav-h);transition:height .2s ease-out;}
.site-header.scrolled .nav-inner{height:60px;}

.brand{display:flex;align-items:center;gap:10px;min-width:0;}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand);color:#fff;
  border-radius:10px;font-weight:700;font-size:18px;
  box-shadow:var(--sh-1);
}
.brand-text{display:flex;flex-direction:column;min-width:0;line-height:1.2;}
.brand-main{font-size:16px;font-weight:700;color:var(--text);white-space:nowrap;}
.brand-sub{font-size:12px;color:var(--text-3);letter-spacing:.6px;}

.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  color:var(--text-2);
  border-radius:8px;
  white-space:nowrap;
  transition:color .16s ease,background .16s ease;
}
.nav-links a:hover{color:var(--brand);background:var(--brand-light);}
.nav-links a.active{color:var(--brand);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-cta-mobile{display:none;}

.nav-actions{display:flex;align-items:center;gap:14px;}
.link-secondary{font-size:15px;color:var(--text-2);}
.link-secondary:hover{color:var(--brand);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  font-size:15px;font-weight:600;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn-cta{background:var(--cta);color:#fff;box-shadow:0 6px 16px rgba(228,121,31,.26);}
.btn-cta:hover{background:var(--cta-hover);color:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(228,121,31,.30);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(37,99,168,.22);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--brand);border-color:var(--brand);}
.btn-ghost:hover{background:var(--brand-light);color:var(--brand-dark);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn:active{transform:translateY(0);}

.nav-toggle{
  display:none;
  width:42px;height:42px;
  align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--border);border-radius:10px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);position:relative;border-radius:2px;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

.nav-mask{
  position:fixed;inset:0;background:rgba(20,40,70,.35);
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;z-index:55;
}
.nav-mask.open{opacity:1;visibility:visible;}

@media (max-width:960px){
  .site-header{background:rgba(255,255,255,.96);-webkit-backdrop-filter:none;backdrop-filter:none;border-bottom:1px solid var(--border);}
  .nav-toggle{display:flex;}
  .nav-actions .link-secondary{display:none;}
  .nav-links{
    position:fixed;top:0;right:0;height:100vh;width:284px;
    flex-direction:column;align-items:flex-start;gap:4px;
    padding:92px 22px 28px;
    background:#fff;
    box-shadow:var(--sh-3);
    transform:translateX(102%);
    transition:transform .24s ease-out;
    z-index:60;
    overflow-y:auto;
  }
  .nav-links.open{transform:translateX(0);}
  .nav-links a{width:100%;padding:12px 14px;font-size:16px;}
  .nav-links a.active::after{display:none;}
  .nav-links a.active{background:var(--brand-light);}
  .nav-cta-mobile{
    display:flex !important;margin-top:12px;width:100%;
    justify-content:center;background:var(--cta);color:#fff !important;
    padding:13px 18px !important;border-radius:var(--r-btn);font-weight:600;
  }
}
@media (max-width:520px){
  .brand-main{font-size:14px;}
  .brand-sub{font-size:11px;}
  .nav-actions .btn-cta{padding:9px 14px;font-size:14px;}
}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding:20px 0 0;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-3);}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li::after{content:"/";color:#C6D2DE;}
.breadcrumb li:last-child::after{display:none;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .current{color:var(--text);font-weight:600;}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;
  margin-top:20px;
  border-radius:18px;
  overflow:hidden;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  box-shadow:var(--sh-2);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(20,50,92,.88) 0%,rgba(23,73,125,.78) 52%,rgba(20,50,92,.58) 100%);
}
.cat-hero-inner{position:relative;padding:56px 28px 52px;max-width:820px;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.34);
  color:#EAF3FC;font-size:13px;letter-spacing:.4px;
  margin-bottom:18px;
}
.cat-hero h1{color:#fff;font-size:36px;line-height:1.25;}
.cat-hero .hero-sub{
  margin-top:14px;font-size:17px;line-height:1.7;color:#D6E4F2;max-width:640px;
}
.cat-hero .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.btn-on-dark{background:#fff;color:var(--brand-dark);}
.btn-on-dark:hover{background:#EAF3FC;color:var(--brand-dark);transform:translateY(-2px);}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.62);}
.btn-outline-light:hover{background:rgba(255,255,255,.14);color:#fff;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:13px;font-weight:500;
}
.badge-teal{background:var(--teal-light);color:#0B7A6D;}
.badge-brand{background:var(--brand-light);color:var(--brand-dark);}
.badge-soft{background:#F1F5F9;color:var(--text-2);}
.cat-hero .badge-teal{background:rgba(255,255,255,.16);color:#D9F4EF;border:1px solid rgba(255,255,255,.26);}
@media (max-width:768px){
  .cat-hero-inner{padding:38px 20px 36px;}
  .cat-hero h1{font-size:27px;}
  .cat-hero .hero-sub{font-size:15.5px;}
}
@media (min-width:1280px){
  .cat-hero h1{font-size:42px;}
}

/* ---------- sections ---------- */
section{padding:64px 0;}
@media (min-width:768px){section{padding:72px 0;}}
@media (min-width:1024px){section{padding:92px 0;}}
.section-head{max-width:720px;margin-bottom:40px;}
.eyebrow{
  display:inline-block;
  font-size:13px;font-weight:600;letter-spacing:1.4px;
  color:var(--brand);text-transform:uppercase;
  margin-bottom:12px;
}
.section-head h2{margin-bottom:14px;}
.section-head p{color:var(--text-2);font-size:16.5px;}
.bg-white{background:#fff;}
.bg-tint{background:var(--brand-tint);}

/* ---------- zigzag ---------- */
.zig-row{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  align-items:center;
  padding:32px 0;
  border-bottom:1px solid var(--divider);
}
.zig-row:last-child{border-bottom:none;padding-bottom:0;}
.zig-row:first-child{padding-top:0;}
@media (min-width:960px){
  .zig-row{grid-template-columns:1.05fr .95fr;gap:56px;padding:44px 0;}
  .zig-row.reverse .zig-media{order:2;}
  .zig-row.reverse .zig-text{order:1;}
}
.zig-media{position:relative;border-radius:var(--r-img);overflow:hidden;box-shadow:var(--sh-1);}
.zig-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);}
.zig-media::after{
  content:"";position:absolute;inset:0;background:rgba(20,60,110,.10);pointer-events:none;
}
.zig-index{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;color:var(--brand);
  letter-spacing:1px;margin-bottom:12px;
}
.zig-index::after{content:"";width:34px;height:1px;background:var(--border);}
.zig-text h3{margin-bottom:14px;font-size:22px;}
.zig-text p{color:var(--text-2);font-size:16px;max-width:560px;}
.check-list{margin-top:20px;display:grid;gap:12px;}
.check-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:15.5px;color:var(--text-2);
}
.check-list li::before{
  content:"";flex:0 0 8px;width:8px;height:8px;margin-top:9px;
  border-radius:50%;background:var(--brand);
}

/* ---------- notice cards ---------- */
.notice-grid{display:grid;gap:24px;grid-template-columns:1fr;}
@media (min-width:768px){.notice-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.notice-grid{grid-template-columns:1.35fr 1fr 1fr;}}
.card{
  background:var(--card);
  border:1px solid var(--border-soft);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(37,99,168,.30);}
.card-lg{padding:30px;}
.card h3{font-size:19px;margin-bottom:10px;}
.card p{color:var(--text-2);font-size:15.5px;}
.card-icon{
  width:40px;height:40px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-light);color:var(--brand);margin-bottom:16px;
}
.card-lg .card-icon{background:var(--brand);color:#fff;}
.status-line{
  display:flex;align-items:center;gap:8px;
  margin-bottom:14px;font-size:13px;font-weight:600;
}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block;}
.dot-warn{background:var(--warn);}
.dot-danger{background:var(--danger);}
.dot-brand{background:var(--brand);}

/* ---------- scene / steps horizontal ---------- */
.step-row{
  display:grid;gap:0;grid-template-columns:1fr;
  border-top:1px solid var(--border);
}
@media (min-width:768px){
  .step-row{grid-template-columns:repeat(3,1fr);}
  .step-item + .step-item{border-left:1px solid var(--border);}
}
.step-item{
  padding:28px 0 4px;
  border-bottom:1px solid var(--border);
}
@media (min-width:768px){
  .step-item{border-bottom:none;padding:32px 26px 8px;}
  .step-item:first-child{padding-left:0;}
}
.step-no{
  font-family:Inter,system-ui,sans-serif;
  font-size:14px;font-weight:700;letter-spacing:2px;
  color:var(--brand);display:block;margin-bottom:12px;
}
.step-item h3{font-size:18px;margin-bottom:10px;}
.step-item p{color:var(--text-2);font-size:15.5px;}

/* ---------- faq ---------- */
.faq-layout{display:grid;gap:32px;grid-template-columns:1fr;}
@media (min-width:1024px){.faq-layout{grid-template-columns:1fr 1.6fr;gap:56px;align-items:start;}}
.faq-side h2{margin-bottom:14px;}
.faq-side p{color:var(--text-2);}
.faq-side .btn{margin-top:20px;}
.faq-item{border-bottom:1px solid var(--divider);}
.faq-item:first-child{border-top:1px solid var(--divider);}
.faq-q{margin:0;font-size:17px;}
.faq-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 16px 20px 0;
  background:transparent;border:none;text-align:left;
  font-size:17px;font-weight:600;color:var(--text);line-height:1.6;
}
.faq-btn:hover{color:var(--brand);}
.faq-icon{
  position:relative;flex:0 0 20px;width:20px;height:20px;
  transition:transform .18s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.faq-icon::before{left:9px;top:2px;width:2px;height:16px;}
.faq-icon::after{left:2px;top:9px;width:16px;height:2px;}
.faq-item.open .faq-btn{color:var(--brand);}
.faq-item.open .faq-icon{transform:rotate(180deg);}
.faq-item.open .faq-icon::before{opacity:0;}
.faq-panel{
  max-height:0;overflow:hidden;
  transition:max-height .28s ease;
  border-left:3px solid transparent;
  padding-left:0;
}
.faq-item.open .faq-panel{
  border-left:3px solid var(--brand);
  padding-left:16px;
}
.faq-panel p{padding:0 0 20px;color:var(--text-2);font-size:15.5px;}

/* ---------- cta ---------- */
.cta-wrap{padding:0 0 96px;}
.cta-card{
  background:var(--brand-light);
  border:1px solid rgba(37,99,168,.24);
  border-radius:18px;
  padding:44px 28px;
  display:grid;gap:26px;grid-template-columns:1fr;
  align-items:center;
}
@media (min-width:960px){
  .cta-card{grid-template-columns:1.4fr 1fr;padding:52px 48px;gap:40px;}
  .cta-card .cta-actions{justify-content:flex-end;}
}
.cta-card h2{font-size:26px;margin-bottom:12px;}
.cta-card p{color:var(--text-2);max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- footer ---------- */
.site-footer{background:#0F2740;color:#B9CADB;padding:64px 0 0;}
.footer-grid{display:grid;gap:36px;grid-template-columns:1fr;}
@media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px;}}
.site-footer .brand-main{color:#fff;}
.site-footer .brand-sub{color:#8CA3BA;}
.site-footer .brand-mark{background:#1D5B96;}
.footer-brand p{margin-top:18px;font-size:15px;color:#9FB4C9;max-width:360px;line-height:1.8;}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:18px;}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{color:#B9CADB;font-size:15px;transition:color .15s ease;}
.footer-col a:hover{color:#fff;}
.footer-col p{font-size:15px;color:#9FB4C9;line-height:1.8;}
.footer-bottom{
  margin-top:52px;
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:14px;color:#8CA3BA;
}

/* ---------- floating ---------- */
.mobile-bar{
  display:none;
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:#fff;border-top:1px solid var(--border);
  box-shadow:0 -8px 22px rgba(23,60,110,.12);
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  align-items:center;justify-content:space-between;gap:14px;
}
.mobile-bar span{font-size:14px;color:var(--text-2);}
.mobile-bar .btn{padding:10px 16px;font-size:14px;}
@media (max-width:767px){
  .mobile-bar{display:flex;}
  body{padding-bottom:78px;}
}
.to-top{
  position:fixed;right:20px;bottom:26px;z-index:65;
  width:48px;height:48px;border-radius:50%;
  background:#fff;border:1px solid var(--brand);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s ease,visibility .2s ease,transform .2s ease,background .18s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--brand-light);}
@media (max-width:767px){.to-top{bottom:88px;right:16px;}}

/* roulang page: category2 */
:root{
  --accent:#2563A8;
  --accent-deep:#17497D;
  --accent-light:#E8F0FA;
  --accent-tint:#F4F7FB;
  --teal:#0E9B8A;
  --teal-light:#E6F5F2;
  --cta:#E4791F;
  --cta-hover:#C9631A;
  --text:#16222E;
  --muted:#4B5C6B;
  --weak:#7C8B99;
  --border:#E2E8F0;
  --card-border:#E6ECF3;
  --divider:#EDF2F7;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-pill:999px;
  --shadow-1:0 2px 8px rgba(23,60,110,.06);
  --shadow-2:0 12px 28px rgba(23,60,110,.12);
  --shadow-3:0 20px 48px rgba(23,60,110,.16);
  --head-h:72px;
  --ease:200ms ease-out;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img)}
a{color:var(--accent);text-decoration:none;transition:color 150ms ease-out}
a:hover{color:var(--accent-deep)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);letter-spacing:.2px}
p{margin:0}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:1024px){
  .container{padding:0 32px}
}
@media (min-width:1536px){
  .container{max-width:1280px}
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
  white-space:nowrap;
}
.btn-cta{background:var(--cta);color:#fff;box-shadow:0 6px 16px rgba(228,121,31,.24)}
.btn-cta:hover{background:var(--cta-hover);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(201,99,26,.28)}
.btn-outline{background:transparent;color:var(--accent);border-color:rgba(37,99,168,.45)}
.btn-outline:hover{background:var(--accent-light);color:var(--accent-deep);border-color:var(--accent)}
.btn-quiet{background:#fff;color:var(--accent);border-color:var(--border)}
.btn-quiet:hover{border-color:var(--accent);color:var(--accent-deep)}
.btn:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  background:rgba(255,255,255,.72);
  backdrop-filter:blur(14px) saturate(150%);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.6);
  box-shadow:0 8px 24px rgba(20,60,110,.08);
  transition:background var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.site-header.is-solid{
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--border);
  box-shadow:0 6px 18px rgba(23,60,110,.10);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:var(--head-h);
  transition:height var(--ease);
}
.site-header.is-solid .header-inner{height:60px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:linear-gradient(160deg,var(--accent),var(--accent-deep));
  color:#fff;font-weight:700;font-size:18px;
  box-shadow:var(--shadow-1);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-main{font-size:16px;font-weight:700;color:var(--text);letter-spacing:.3px}
.brand-sub{font-size:12px;color:var(--weak);letter-spacing:2px}
.nav-links{
  display:none;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.nav-links a{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:38px;
  padding:0 14px;
  border-radius:var(--radius-pill);
  font-size:14.5px;
  font-weight:500;
  color:var(--muted);
  transition:color var(--ease),background var(--ease);
}
.nav-links a:hover{color:var(--accent-deep);background:var(--accent-light)}
.nav-links a.active{color:var(--accent-deep);font-weight:600;background:var(--accent-light)}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;bottom:2px;
  width:16px;height:2px;border-radius:2px;background:var(--accent);
  transform:translateX(-50%);
}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-ghost{font-size:14.5px;font-weight:500;color:var(--muted);display:none}
.nav-ghost:hover{color:var(--accent-deep)}
.nav-toggle{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;padding:0 10px;
  border:1px solid var(--border);border-radius:12px;background:#fff;
}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--accent-deep);transition:transform var(--ease),opacity var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media (min-width:1024px){
  .nav-links{display:flex}
  .nav-actions{margin-left:12px}
  .nav-ghost{display:inline-flex}
  .nav-toggle{display:none}
}
.drawer-mask{
  position:fixed;inset:0;z-index:90;
  background:rgba(20,40,70,.35);
  opacity:0;visibility:hidden;transition:opacity 240ms ease-out,visibility 240ms ease-out;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:95;
  width:min(84vw,320px);
  background:#fff;
  box-shadow:var(--shadow-3);
  transform:translateX(100%);
  transition:transform 240ms ease-out;
  padding:22px 20px;
  display:flex;flex-direction:column;gap:8px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--border);color:var(--muted);font-size:18px;line-height:1}
.drawer a.drawer-link{
  display:block;padding:13px 14px;border-radius:10px;
  color:var(--muted);font-weight:500;border:1px solid transparent;
}
.drawer a.drawer-link:hover{background:var(--accent-light);color:var(--accent-deep)}
.drawer a.drawer-link.active{background:var(--accent-light);color:var(--accent-deep);font-weight:600;border-color:rgba(37,99,168,.25)}
.drawer .btn{margin-top:14px;width:100%}

/* ---------- 通用板块 ---------- */
.page{padding-top:var(--head-h)}
.section{padding:64px 0}
@media (min-width:768px){.section{padding:72px 0}}
@media (min-width:1024px){.section{padding:96px 0}}
.section-head{max-width:720px;margin-bottom:32px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:28px;padding:0 12px;border-radius:var(--radius-pill);
  background:var(--teal-light);color:#0A7F71;
  font-size:13px;font-weight:600;letter-spacing:.4px;
}
.section-title{font-size:26px;line-height:1.3;margin-top:14px}
@media (min-width:1024px){.section-title{font-size:31px}}
.section-desc{margin-top:12px;color:var(--muted);font-size:16px;line-height:1.75}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;
  border-radius:var(--radius-pill);background:var(--accent-light);color:var(--accent-deep);
  font-size:13px;font-weight:600;
}
.tag-teal{background:var(--teal-light);color:#0A7F71}

/* ---------- 缩小版 Hero ---------- */
.hero-sm{
  position:relative;
  padding:40px 0 48px;
  background-image:linear-gradient(105deg,rgba(23,60,110,.82),rgba(37,99,168,.55)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  color:#fff;
  overflow:hidden;
}
.hero-sm::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:44px 44px;
  pointer-events:none;
}
.hero-sm .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:rgba(255,255,255,.82);margin-bottom:18px}
.breadcrumb a{color:rgba(255,255,255,.9)}
.breadcrumb a:hover{color:#fff;text-decoration:underline}
.breadcrumb .sep{color:rgba(255,255,255,.5)}
.hero-sm h1{font-size:28px;line-height:1.25;color:#fff;margin-bottom:14px}
@media (min-width:768px){.hero-sm h1{font-size:36px}}
@media (min-width:1024px){.hero-sm h1{font-size:42px}}
.hero-lead{font-size:17px;line-height:1.7;color:rgba(255,255,255,.9);max-width:640px}
@media (min-width:1024px){.hero-lead{font-size:18px}}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-tags span{
  display:inline-flex;align-items:center;gap:6px;
  height:30px;padding:0 12px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.32);
  color:#fff;font-size:13px;font-weight:500;
}
.hero-cards{display:grid;gap:16px;margin-top:30px}
@media (min-width:768px){.hero-cards{grid-template-columns:repeat(3,1fr)}}
.hero-mini{
  background:rgba(255,255,255,.92);
  border-radius:var(--radius-card);
  padding:18px;
  box-shadow:var(--shadow-2);
  color:var(--text);
}
.hero-mini strong{display:block;font-size:15px;margin-bottom:6px}
.hero-mini span{font-size:13.5px;color:var(--muted);line-height:1.7}

/* ---------- 主体两栏 ---------- */
.page-body{display:grid;gap:28px;align-items:start}
@media (min-width:1024px){
  .page-body{grid-template-columns:250px minmax(0,1fr);gap:44px}
}
.anchor-nav{
  background:#fff;
  border:1px solid var(--card-border);
  border-radius:var(--radius-card);
  padding:14px;
  box-shadow:var(--shadow-1);
}
@media (min-width:1024px){
  .anchor-nav{position:sticky;top:96px;padding:22px}
}
.anchor-nav h2{font-size:14px;color:var(--weak);font-weight:600;letter-spacing:.6px;margin-bottom:10px}
.anchor-list{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;scrollbar-width:thin}
@media (min-width:1024px){
  .anchor-list{display:block;overflow:visible;padding-bottom:0}
}
.anchor-list a{
  display:block;white-space:nowrap;
  padding:9px 12px;border-radius:10px;
  font-size:14px;font-weight:500;color:var(--muted);
  border-left:3px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.anchor-list a:hover{background:var(--accent-tint);color:var(--accent-deep);border-left-color:rgba(37,99,168,.4)}
.anchor-note{margin-top:16px;padding-top:16px;border-top:1px solid var(--divider);font-size:13.5px;color:var(--weak);line-height:1.7}

/* ---------- 图文左右 ---------- */
.split{display:grid;gap:20px}
@media (min-width:1024px){.split{grid-template-columns:1.15fr .85fr;gap:24px}}
.feature-card{
  background:#fff;border:1px solid var(--card-border);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(37,99,168,.3)}
.feature-card img{width:100%;height:220px;object-fit:cover;border-radius:0}
@media (min-width:1024px){.feature-card img{height:268px}}
.feature-body{padding:24px}
.feature-body h3{font-size:20px;margin-bottom:10px}
.feature-body p{color:var(--muted);font-size:15.5px}
.mini-stack{display:grid;gap:16px}
.mini-card{
  background:#fff;border:1px solid var(--card-border);border-radius:var(--radius-card);
  padding:20px;box-shadow:var(--shadow-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.mini-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(37,99,168,.3)}
.mini-card h4{font-size:17px;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.mini-card p{color:var(--muted);font-size:14.5px}
.icon-dot{
  width:28px;height:28px;flex:0 0 28px;border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--accent-light);color:var(--accent);
}
.icon-dot svg{width:16px;height:16px}

/* ---------- 非等高瀑布 ---------- */
.waterfall{
  column-count:1;
  column-gap:22px;
}
@media (min-width:768px){.waterfall{column-count:2}}
.wf-card{
  break-inside:avoid;
  background:#fff;
  border:1px solid var(--card-border);
  border-radius:var(--radius-card);
  padding:22px;
  margin:0 0 22px;
  box-shadow:var(--shadow-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.wf-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(37,99,168,.3)}
.wf-card .wf-index{
  font-family:Inter,ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:13px;font-weight:600;color:var(--weak);letter-spacing:1px;
}
.wf-card h3{font-size:19px;line-height:1.4;margin:10px 0 10px}
.wf-card p{color:var(--muted);font-size:15px}
.wf-card ul{margin-top:14px;display:grid;gap:8px}
.wf-card li{
  position:relative;padding-left:18px;font-size:14.5px;color:var(--muted);
}
.wf-card li::before{
  content:"";position:absolute;left:0;top:10px;
  width:7px;height:7px;border-radius:50%;background:var(--accent);
}
.wf-media{margin-top:16px}
.wf-media img{width:100%;height:170px;object-fit:cover}
.wf-tall img{height:220px}

/* ---------- 序号横排 ---------- */
.steps-row{display:grid;gap:0;border:1px solid var(--card-border);border-radius:var(--radius-card);background:#fff;box-shadow:var(--shadow-1);overflow:hidden}
@media (min-width:768px){.steps-row{grid-template-columns:repeat(3,1fr)}}
.step-cell{padding:26px 24px;border-top:1px solid var(--divider)}
.step-cell:first-child{border-top:0}
@media (min-width:768px){
  .step-cell{border-top:0;border-left:1px solid var(--divider)}
  .step-cell:first-child{border-left:0}
}
.step-num{
  font-family:Inter,ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:22px;font-weight:700;color:rgba(37,99,168,.28);letter-spacing:1px;
}
.step-cell h3{font-size:17.5px;margin:10px 0 8px}
.step-cell p{color:var(--muted);font-size:14.5px}

/* ---------- 设备对照 ---------- */
.device-grid{display:grid;gap:20px}
@media (min-width:768px){.device-grid{grid-template-columns:1fr 1fr;align-items:start}}
.device-card{
  background:#fff;border:1px solid var(--card-border);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.device-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(37,99,168,.3)}
.device-card img{width:100%;height:196px;object-fit:cover;border-radius:0}
.device-body{padding:22px}
.device-head{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.device-head h3{font-size:19px}
.device-list{display:grid;gap:12px;margin-top:6px}
.device-list li{
  display:flex;gap:10px;font-size:14.5px;color:var(--muted);
  padding-top:12px;border-top:1px solid var(--divider);
}
.device-list li:first-child{border-top:0;padding-top:0}
.check{
  width:20px;height:20px;flex:0 0 20px;margin-top:3px;border-radius:6px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--teal-light);color:var(--teal);
}
.check svg{width:12px;height:12px}
.device-card.is-secondary{margin-top:22px}
@media (min-width:768px){.device-card.is-secondary{margin-top:26px}}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;gap:24px}
@media (min-width:1024px){.faq-wrap{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:40px;align-items:start}}
.faq-side h2{font-size:26px;line-height:1.3}
@media (min-width:1024px){.faq-side h2{font-size:30px}}
.faq-side p{margin-top:12px;color:var(--muted);font-size:15.5px}
.faq-list{background:#fff;border:1px solid var(--card-border);border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden}
.faq-item{border-top:1px solid var(--divider)}
.faq-item:first-child{border-top:0}
.faq-q{
  width:100%;
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:20px 22px;text-align:left;
  font-size:16px;font-weight:600;color:var(--text);
  transition:background var(--ease),color var(--ease);
}
.faq-q:hover{background:var(--accent-tint);color:var(--accent-deep)}
.faq-icon{
  width:26px;height:26px;flex:0 0 26px;border-radius:8px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--accent-light);color:var(--accent);
  font-size:16px;font-weight:700;line-height:1;
  transition:transform 180ms ease-out,background var(--ease),color var(--ease);
}
.faq-item.is-open{border-left:3px solid var(--accent)}
.faq-item.is-open .faq-q{color:var(--accent-deep)}
.faq-item.is-open .faq-icon{background:var(--accent);color:#fff;transform:rotate(180deg)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height 220ms ease-out;
}
.faq-a-inner{padding:0 22px 20px;color:var(--muted);font-size:15px;line-height:1.75}
.faq-item.is-open .faq-a{max-height:320px}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--accent-tint);
  border-top:1px solid var(--divider);
  padding:64px 0;
}
@media (min-width:1024px){.cta-band{padding:88px 0}}
.cta-card{
  background:#fff;
  border:1px solid rgba(37,99,168,.35);
  border-radius:var(--radius-card);
  padding:28px;
  box-shadow:var(--shadow-2);
  display:grid;gap:24px;
}
@media (min-width:1024px){
  .cta-card{grid-template-columns:minmax(0,1fr) auto;align-items:center;padding:40px 44px}
}
.cta-card h2{font-size:24px;line-height:1.3}
@media (min-width:1024px){.cta-card h2{font-size:29px}}
.cta-card p{margin-top:12px;color:var(--muted);font-size:15.5px;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600}
.back-row{
  margin-top:24px;display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  padding-top:24px;border-top:1px solid var(--divider);
}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--border);padding:56px 0 0;margin-top:0}
.footer-grid{display:grid;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand p{margin-top:16px;color:var(--muted);font-size:14.5px;line-height:1.75;max-width:340px}
.footer-col h4{font-size:15px;margin-bottom:14px}
.footer-col ul{display:grid;gap:10px}
.footer-col ul a{font-size:14.5px;color:var(--muted)}
.footer-col ul a:hover{color:var(--accent)}
.footer-col p{font-size:14.5px;color:var(--muted);line-height:1.75}
.footer-bottom{
  margin-top:44px;padding:20px 0;border-top:1px solid var(--divider);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13.5px;color:var(--weak);
}

/* ---------- 移动端固定条 / 返回顶部 ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  height:56px;padding:0 16px calc(0px + env(safe-area-inset-bottom,0px));
  background:#fff;border-top:1px solid var(--border);
  box-shadow:0 -8px 20px rgba(23,60,110,.12);
}
.mobile-bar span{font-size:14px;color:var(--muted);font-weight:500}
@media (min-width:768px){.mobile-bar{display:none}}
@media (max-width:767px){body{padding-bottom:56px}}
.to-top{
  position:fixed;right:20px;bottom:76px;z-index:60;
  width:48px;height:48px;border-radius:50%;
  background:#fff;border:1px solid var(--accent);color:var(--accent);
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-2);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity var(--ease),visibility var(--ease),transform var(--ease),background var(--ease),color var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--accent);color:#fff}
@media (min-width:768px){.to-top{bottom:28px}}
.to-top svg{width:18px;height:18px}

/* roulang page: category3 */
:root{
  --brand:#2563A8;
  --brand-dark:#17497D;
  --brand-light:#E8F0FA;
  --brand-tint:#F4F7FB;
  --teal:#0E9B8A;
  --teal-light:#E6F5F2;
  --cta:#E4791F;
  --cta-hover:#C9631A;
  --text:#16222E;
  --text-2:#4B5C6B;
  --text-3:#7C8B99;
  --border:#E2E8F0;
  --border-soft:#E6ECF3;
  --divider:#EDF2F7;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --success:#0E9B8A;
  --warning:#D98416;
  --error:#C0392B;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-pill:999px;
  --shadow-1:0 2px 8px rgba(23,60,110,.06);
  --shadow-2:0 12px 28px rgba(23,60,110,.12);
  --shadow-3:0 20px 48px rgba(23,60,110,.16);
  --container:1200px;
  --font-cn:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:var(--brand);text-decoration:none;transition:color .15s ease;}
a:hover{color:var(--brand-dark);}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;line-height:1.3;}
p{margin:0 0 1.2em;color:var(--text-2);}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:1024px){
  .container{padding:0 32px;}
}
@media (min-width:1536px){
  .container{max-width:1280px;}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  transition:background-color .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn-cta{
  background:var(--cta);
  color:#fff;
  box-shadow:0 6px 16px rgba(228,121,31,.24);
}
.btn-cta:hover{background:var(--cta-hover);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(228,121,31,.28);}
.btn-ghost{
  background:#fff;
  color:var(--brand-dark);
  border:1px solid var(--border);
  box-shadow:var(--shadow-1);
}
.btn-ghost:hover{border-color:rgba(37,99,168,.42);color:var(--brand-dark);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn-outline{
  background:transparent;
  color:var(--brand-dark);
  border:1px solid rgba(37,99,168,.42);
}
.btn-outline:hover{background:var(--brand-light);color:var(--brand-dark);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.6);
  box-shadow:0 8px 24px rgba(20,60,110,.08);
  transition:background-color .2s ease,box-shadow .2s ease,height .2s ease,border-color .2s ease;
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
  transition:height .2s ease;
}
.site-header.is-solid{
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--border);
  box-shadow:0 6px 18px rgba(23,60,110,.10);
}
.site-header.is-solid .header-inner{height:60px;}

.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:38px;height:38px;
  flex:0 0 38px;
  border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,var(--brand) 0%,var(--brand-dark) 100%);
  color:#fff;
  font-size:18px;
  font-weight:700;
  letter-spacing:0;
  box-shadow:0 6px 14px rgba(23,73,125,.24);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-main{font-size:16px;font-weight:700;color:var(--text);letter-spacing:.01em;}
.brand-sub{font-size:12px;color:var(--text-3);letter-spacing:.16em;}

.nav-links{display:flex;align-items:center;gap:4px;}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:var(--text-2);
  border-radius:8px;
  transition:color .15s ease,background-color .15s ease;
}
.nav-links a:hover{color:var(--brand-dark);background:var(--brand-light);}
.nav-links a::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s ease;
}
.nav-links a:hover::after,
.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{color:var(--brand-dark);font-weight:600;}

.header-actions{display:flex;align-items:center;gap:16px;}
.link-secondary{font-size:15px;font-weight:500;color:var(--text-2);}
.link-secondary:hover{color:var(--brand-dark);}

.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:10px;
  border:1px solid var(--border);
  background:#fff;
  align-items:center;justify-content:center;
}
.nav-toggle span{
  display:block;width:18px;height:2px;border-radius:2px;background:var(--brand-dark);
  position:relative;
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--brand-dark);
  transition:transform .2s ease;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

@media (max-width:1023px){
  .nav-links,.header-actions .link-secondary{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-actions{gap:10px;}
}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,40,70,.35);
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;z-index:110;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:290px;max-width:86vw;
  background:#fff;z-index:120;
  transform:translateX(100%);
  transition:transform .24s ease-out;
  box-shadow:var(--shadow-3);
  padding:22px 20px 28px;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--text-2);
}
.drawer nav a{
  display:block;
  padding:13px 12px;
  border-radius:10px;
  font-size:15px;
  font-weight:500;
  color:var(--text-2);
  border-bottom:1px solid var(--divider);
}
.drawer nav a:last-child{border-bottom:none;}
.drawer nav a:hover{background:var(--brand-light);color:var(--brand-dark);}
.drawer nav a.active{color:var(--brand-dark);font-weight:600;background:var(--brand-light);}
.drawer .btn{width:100%;margin-top:18px;}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:132px 0 64px;
  background-image:linear-gradient(120deg,rgba(255,255,255,.94) 0%,rgba(244,247,251,.88) 54%,rgba(232,240,250,.82) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--border);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(37,99,168,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,168,.05) 1px,transparent 1px);
  background-size:48px 48px;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:1;}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:48px;
  align-items:center;
}
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--text-3);margin-bottom:18px;
}
.crumbs a{color:var(--text-2);}
.crumbs a:hover{color:var(--brand);}
.crumbs span.sep{color:#B7C3CF;}
.crumbs .current{color:var(--brand-dark);font-weight:600;}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:30px;padding:0 14px;border-radius:var(--radius-pill);
  background:var(--teal-light);color:#0A7768;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  margin-bottom:18px;
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--teal);display:inline-block;}

.page-hero h1{
  font-size:42px;
  line-height:1.24;
  letter-spacing:-.01em;
  margin-bottom:16px;
}
.page-hero .lede{
  font-size:18px;
  line-height:1.7;
  color:var(--text-2);
  max-width:34em;
  margin-bottom:26px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:24px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;align-items:center;gap:7px;
  height:30px;padding:0 13px;
  border-radius:var(--radius-pill);
  background:var(--teal-light);
  color:#0A7768;
  font-size:13px;
  font-weight:500;
}
.tag::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--teal);}

.hero-visual{position:relative;}
.hero-visual img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:16px;
  box-shadow:var(--shadow-2);
}
.hero-visual::before{
  content:"";
  position:absolute;left:-14px;bottom:-14px;width:120px;height:120px;
  border-radius:18px;
  background:rgba(37,99,168,.07);
  z-index:-1;
}
.hero-badge{
  position:absolute;
  left:18px;bottom:18px;
  background:rgba(255,255,255,.94);
  border:1px solid var(--border);
  border-radius:12px;
  padding:12px 16px;
  box-shadow:var(--shadow-2);
  min-width:172px;
}
.hero-badge strong{display:block;font-size:20px;color:var(--brand-dark);line-height:1.2;}
.hero-badge span{font-size:13px;color:var(--text-3);}

@media (max-width:1023px){
  .page-hero{padding:120px 0 52px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .page-hero h1{font-size:34px;}
  .hero-visual{order:-1;}
  .hero-visual img{aspect-ratio:16/10;}
}
@media (max-width:520px){
  .page-hero{padding:112px 0 44px;}
  .page-hero h1{font-size:28px;}
  .page-hero .lede{font-size:16.5px;}
  .hero-cta .btn{width:100%;}
  .hero-visual::before{display:none;}
}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section.tight{padding:64px 0;}
.section.alt{background:#fff;}
.section-title{margin-bottom:40px;max-width:720px;}
.section-title .kicker{
  display:block;font-size:13.5px;font-weight:600;letter-spacing:.16em;
  color:var(--brand);text-transform:uppercase;margin-bottom:12px;
}
.section-title h2{font-size:31px;line-height:1.3;margin-bottom:14px;}
.section-title p{font-size:16.5px;color:var(--text-2);margin:0;}
@media (max-width:768px){
  .section{padding:64px 0;}
  .section.tight{padding:52px 0;}
  .section-title h2{font-size:25px;}
}

/* ---------- 页面布局：侧栏 + 主内容 ---------- */
.layout{
  display:grid;
  grid-template-columns:248px minmax(0,1fr);
  gap:48px;
  align-items:start;
}
.side-nav{
  position:sticky;
  top:96px;
  background:#fff;
  border:1px solid var(--border-soft);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:22px 20px;
}
.side-nav h3{
  font-size:13px;letter-spacing:.14em;color:var(--text-3);
  font-weight:600;margin-bottom:14px;
}
.side-nav a{
  display:block;
  padding:10px 12px;
  border-radius:9px;
  font-size:14.5px;
  color:var(--text-2);
  border-left:3px solid transparent;
  transition:background-color .15s ease,color .15s ease,border-color .15s ease;
}
.side-nav a:hover{background:var(--brand-tint);color:var(--brand-dark);}
.side-nav a.active{background:var(--brand-light);color:var(--brand-dark);font-weight:600;border-left-color:var(--brand);}
.side-nav .side-note{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--divider);
  font-size:13px;color:var(--text-3);line-height:1.7;
}
.side-select{display:none;}

@media (max-width:1023px){
  .layout{grid-template-columns:1fr;gap:28px;}
  .side-nav{display:none;}
  .side-select{display:block;position:relative;}
  .side-select select{
    width:100%;
    height:48px;
    border-radius:var(--radius-btn);
    border:1px solid var(--border);
    background:#fff url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%234B5C6B' stroke-width='2.2' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right 16px center;
    padding:0 16px;
    font-family:inherit;
    font-size:15px;
    color:var(--text);
    appearance:none;
    box-shadow:var(--shadow-1);
  }
}

/* ---------- 时间线 ---------- */
.timeline{
  position:relative;
  padding-left:56px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:19px;top:10px;bottom:10px;
  width:1px;
  background:var(--border);
}
.tl-item{position:relative;padding-bottom:40px;}
.tl-item:last-child{padding-bottom:0;}
.tl-node{
  position:absolute;
  left:-56px;top:2px;
  width:38px;height:38px;
  border-radius:50%;
  background:#fff;
  border:1px solid rgba(37,99,168,.45);
  color:var(--brand-dark);
  display:flex;align-items:center;justify-content:center;
  font-size:13.5px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
  box-shadow:0 4px 12px rgba(23,60,110,.08);
  z-index:1;
}
.tl-card{
  background:#fff;
  border:1px solid var(--border-soft);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:24px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(37,99,168,.3);}
.tl-card h3{font-size:20px;margin-bottom:8px;}
.tl-card p{margin-bottom:14px;font-size:15.5px;}
.tl-meta{
  display:flex;flex-wrap:wrap;gap:8px;
}
.chip{
  display:inline-flex;align-items:center;
  height:26px;padding:0 11px;
  border-radius:var(--radius-pill);
  background:var(--brand-light);
  color:var(--brand-dark);
  font-size:12.5px;
  font-weight:500;
}
.chip.ok{background:var(--teal-light);color:#0A7768;}
.chip.warn{background:#FBF1E1;color:#9A6410;}

/* ---------- 行卡对照 ---------- */
.rowlist{
  background:#fff;
  border:1px solid var(--border-soft);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  overflow:hidden;
}
.row{
  display:grid;
  grid-template-columns:minmax(0,1.1fr) minmax(0,1.5fr) auto;
  gap:24px;
  align-items:center;
  padding:22px 26px;
  border-bottom:1px solid var(--divider);
  transition:background-color .16s ease;
}
.row:last-child{border-bottom:none;}
.row:hover{background:var(--brand-tint);}
.row-label strong{display:block;font-size:16.5px;font-weight:600;color:var(--text);margin-bottom:4px;}
.row-label span{font-size:13.5px;color:var(--text-3);}
.row-desc{font-size:15px;color:var(--text-2);margin:0;}
.row-state{
  justify-self:end;
  display:inline-flex;align-items:center;gap:7px;
  height:28px;padding:0 12px;
  border-radius:var(--radius-pill);
  font-size:12.5px;font-weight:600;
  white-space:nowrap;
}
.row-state.ok{background:var(--teal-light);color:#0A7768;}
.row-state.info{background:var(--brand-light);color:var(--brand-dark);}
.row-state.warn{background:#FBF1E1;color:#9A6410;}
@media (max-width:900px){
  .row{grid-template-columns:1fr;gap:12px;padding:20px;}
  .row-state{justify-self:start;}
}

/* ---------- 要点卡片 ---------- */
.grid-3{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.grid-2{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.card{
  background:#fff;
  border:1px solid var(--border-soft);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:24px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(37,99,168,.3);}
.card h3{font-size:19px;margin-bottom:10px;}
.card p{font-size:15px;margin:0;}
.card .icon{
  width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-light);
  color:var(--brand-dark);
  margin-bottom:16px;
}
.card .icon svg{width:22px;height:22px;}
.card.feature{
  grid-column:span 1;
  background:linear-gradient(180deg,#FFFFFF 0%,#F8FBFF 100%);
  border-color:rgba(37,99,168,.2);
}
@media (max-width:1023px){
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:640px){
  .grid-3,.grid-2{grid-template-columns:1fr;}
}

/* 图文块 */
.split{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:48px;
  align-items:center;
}
.split img{
  width:100%;
  aspect-ratio:3/2;
  object-fit:cover;
  box-shadow:var(--shadow-2);
}
.split h3{font-size:24px;margin-bottom:14px;}
.split p{font-size:15.5px;}
.check-list li{
  position:relative;
  padding-left:26px;
  margin-bottom:12px;
  font-size:15px;
  color:var(--text-2);
}
.check-list li::before{
  content:"";
  position:absolute;left:2px;top:9px;
  width:8px;height:8px;border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 0 4px rgba(37,99,168,.12);
}
@media (max-width:900px){
  .split{grid-template-columns:1fr;gap:28px;}
}

/* ---------- FAQ ---------- */
.faq-wrap{
  display:grid;
  grid-template-columns:minmax(0,.8fr) minmax(0,1.6fr);
  gap:48px;
  align-items:start;
}
.faq-side h2{font-size:30px;margin-bottom:14px;}
.faq-side p{font-size:15.5px;}
.faq-side .btn{margin-top:8px;}
.faq-list{
  background:#fff;
  border:1px solid var(--border-soft);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  overflow:hidden;
}
.faq-item{border-bottom:1px solid var(--divider);}
.faq-item:last-child{border-bottom:none;}
.faq-q{
  width:100%;
  display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  padding:20px 24px 20px 21px;
  text-align:left;
  font-size:16.5px;
  font-weight:600;
  color:var(--text);
  line-height:1.6;
  border-left:3px solid transparent;
  transition:background-color .16s ease,border-color .16s ease;
}
.faq-q:hover{background:var(--brand-tint);}
.faq-item.open .faq-q{border-left-color:var(--brand);color:var(--brand-dark);}
.faq-icon{
  flex:0 0 22px;
  width:22px;height:22px;
  position:relative;
  margin-top:3px;
  transition:transform .18s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.faq-icon::before{left:0;top:10px;width:22px;height:2px;}
.faq-icon::after{left:10px;top:0;width:2px;height:22px;transition:opacity .18s ease;}
.faq-item.open .faq-icon::after{opacity:0;}
.faq-item.open .faq-icon{transform:rotate(180deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s ease;
}
.faq-a-inner{
  padding:0 24px 22px 21px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.8;
}
@media (max-width:900px){
  .faq-wrap{grid-template-columns:1fr;gap:28px;}
  .faq-side h2{font-size:24px;}
}

/* ---------- 数据带 ---------- */
.stats{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  background:#fff;
  border:1px solid var(--border-soft);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  overflow:hidden;
}
.stat{
  padding:26px 24px;
  border-right:1px solid var(--divider);
}
.stat:last-child{border-right:none;}
.stat strong{
  display:block;
  font-size:30px;
  font-weight:700;
  color:var(--brand-dark);
  font-variant-numeric:tabular-nums;
  line-height:1.2;
  margin-bottom:6px;
}
.stat span{font-size:14px;color:var(--text-3);}
@media (max-width:900px){
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat{border-bottom:1px solid var(--divider);}
  .stat:nth-child(2n){border-right:none;}
  .stat:nth-last-child(-n+2){border-bottom:none;}
}
@media (max-width:520px){
  .stats{grid-template-columns:1fr;}
  .stat{border-right:none;border-bottom:1px solid var(--divider);}
  .stat:last-child{border-bottom:none;}
}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:var(--brand-tint);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  padding:72px 0;
}
.cta-card{
  background:#fff;
  border:1px solid rgba(37,99,168,.24);
  border-radius:18px;
  box-shadow:var(--shadow-2);
  padding:44px;
  display:grid;
  grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);
  gap:36px;
  align-items:center;
}
.cta-card h2{font-size:29px;margin-bottom:14px;}
.cta-card p{font-size:16px;margin-bottom:0;}
.cta-actions{display:flex;flex-direction:column;gap:12px;}
.cta-actions .btn{width:100%;}
@media (max-width:900px){
  .cta-band{padding:56px 0;}
  .cta-card{grid-template-columns:1fr;padding:28px;gap:24px;}
  .cta-card h2{font-size:23px;}
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#0F2740;
  color:#C7D6E4;
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
  gap:40px;
  padding-bottom:44px;
}
.footer-brand .brand-main{color:#fff;}
.footer-brand .brand-sub{color:#8CA3BA;}
.footer-brand p{
  margin-top:18px;
  font-size:14.5px;
  color:#9DB1C4;
  line-height:1.8;
  max-width:34em;
}
.footer-col h4{
  font-size:14px;
  letter-spacing:.1em;
  color:#fff;
  font-weight:600;
  margin-bottom:18px;
}
.footer-col ul li{margin-bottom:11px;}
.footer-col a{font-size:14.5px;color:#9DB1C4;}
.footer-col a:hover{color:#fff;}
.footer-col p{font-size:14px;color:#9DB1C4;line-height:1.8;margin:0;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;justify-content:space-between;
  padding:20px 0 26px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13.5px;
  color:#7E93A8;
}
@media (max-width:900px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr;}
  .site-footer{padding-top:48px;}
}

/* ---------- 移动端固定条 / 返回顶部 ---------- */
.mobile-bar{
  display:none;
}
@media (max-width:767px){
  .mobile-bar{
    position:fixed;
    left:0;right:0;bottom:0;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    height:56px;
    padding:0 16px calc(0px + env(safe-area-inset-bottom));
    background:#fff;
    border-top:1px solid var(--border);
    box-shadow:0 -6px 18px rgba(23,60,110,.10);
    z-index:90;
  }
  .mobile-bar span{font-size:13.5px;color:var(--text-2);}
  .mobile-bar .btn{height:38px;padding:0 16px;font-size:14px;}
  body{padding-bottom:56px;}
}

.to-top{
  position:fixed;
  right:24px;bottom:28px;
  width:48px;height:48px;
  border-radius:50%;
  background:#fff;
  border:1px solid rgba(37,99,168,.4);
  color:var(--brand-dark);
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-2);
  opacity:0;visibility:hidden;
  transform:translateY(8px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s ease,background-color .18s ease;
  z-index:95;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--brand-light);}
@media (max-width:767px){
  .to-top{bottom:72px;right:16px;width:44px;height:44px;}
}

/* roulang page: category4 */
/* ============ 设计变量 ============ */
:root{
  --brand:#2563A8;
  --brand-dark:#17497D;
  --brand-light:#E8F0FA;
  --brand-xlight:#F4F7FB;
  --teal:#0E9B8A;
  --teal-light:#E6F5F2;
  --cta:#E4791F;
  --cta-hover:#C9631A;
  --text:#16222E;
  --text-2:#4B5C6B;
  --text-3:#7C8B99;
  --border:#E2E8F0;
  --divider:#EDF2F7;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --success:#0E9B8A;
  --warning:#D98416;
  --danger:#C0392B;
  --info:#2563A8;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 2px 8px rgba(23,60,110,.06);
  --shadow-2:0 12px 28px rgba(23,60,110,.12);
  --shadow-3:0 20px 48px rgba(23,60,110,.16);
  --ease:180ms ease-out;
}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Inter",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  text-align:left;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:inherit;text-decoration:none;transition:color var(--ease),background-color var(--ease),border-color var(--ease);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
::selection{background:var(--brand-light);color:var(--brand-dark);}

/* ============ 容器 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1024px){ .container{padding:0 32px;} }
@media (min-width:1536px){ .container{max-width:1280px;} }

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  height:72px;display:flex;align-items:center;
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.6);
  box-shadow:0 8px 24px rgba(20,60,110,.08);
  transition:height 200ms ease-out,background 200ms ease-out,box-shadow 200ms ease-out,border-color 200ms ease-out;
}
.site-header.scrolled{
  height:60px;
  background:rgba(255,255,255,.96);
  border-bottom-color:var(--border);
  box-shadow:0 6px 18px rgba(23,60,110,.10);
}
.header-inner{display:flex;align-items:center;gap:20px;width:100%;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;flex-shrink:0;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand) 0%,var(--brand-dark) 100%);
  color:#fff;font-size:17px;font-weight:700;letter-spacing:.5px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-main{font-size:15px;font-weight:700;color:var(--text);letter-spacing:.2px;}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:2px;}
.nav-links{display:none;align-items:center;gap:2px;margin-left:12px;}
.nav-links a{
  padding:8px 12px;border-radius:999px;font-size:15px;color:var(--text-2);white-space:nowrap;
}
.nav-links a:hover{background:var(--brand-light);color:var(--brand-dark);}
.nav-links a.active{background:var(--brand-light);color:var(--brand-dark);font-weight:600;}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto;}
.header-link{font-size:15px;color:var(--text-2);white-space:nowrap;}
.header-link:hover{color:var(--brand);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);font-weight:600;letter-spacing:.2px;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:var(--cta);color:#fff;padding:10px 20px;font-size:15px;
  box-shadow:0 6px 16px rgba(228,121,31,.24);
}
.btn-primary:hover{background:var(--cta-hover);transform:translateY(-1px);box-shadow:0 10px 22px rgba(228,121,31,.28);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{
  background:#fff;color:var(--brand-dark);border:1px solid var(--border);
  padding:10px 20px;font-size:15px;
}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--shadow-1);}
.btn-ghost{color:var(--brand);font-size:15px;padding:8px 4px;font-weight:600;}
.btn-ghost:hover{color:var(--brand-dark);text-decoration:underline;text-underline-offset:4px;}
.btn-lg{padding:13px 26px;font-size:16px;}

/* 移动端导航按钮与抽屉 */
.nav-toggle{
  display:flex;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;border-radius:10px;border:1px solid var(--border);
  background:rgba(255,255,255,.9);margin-left:auto;padding:0 10px;
}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--text);transition:transform 200ms ease-out,opacity 200ms ease-out;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,40,70,.35);opacity:0;visibility:hidden;
  transition:opacity 240ms ease-out,visibility 240ms ease-out;z-index:90;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:290px;max-width:86%;
  background:#fff;z-index:100;padding:22px 20px 32px;
  transform:translateX(100%);transition:transform 240ms ease-out;
  box-shadow:-12px 0 32px rgba(20,40,70,.18);
  display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-title{font-size:13px;letter-spacing:2px;color:var(--text-3);margin:6px 0 12px;}
.drawer a{
  display:block;padding:12px 14px;border-radius:10px;font-size:15px;color:var(--text-2);
}
.drawer a:hover{background:var(--brand-xlight);color:var(--brand-dark);}
.drawer a.active{background:var(--brand-light);color:var(--brand-dark);font-weight:600;}
.drawer .btn-primary{margin-top:16px;width:100%;}
.drawer-close{align-self:flex-end;width:38px;height:38px;border-radius:10px;border:1px solid var(--border);font-size:20px;line-height:1;color:var(--text-2);}

/* ============ 首屏 ============ */
.page-hero{
  position:relative;
  padding:130px 0 64px;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(255,255,255,.96) 0%,rgba(255,255,255,.90) 46%,rgba(244,247,251,.72) 100%);
}
.page-hero .container{position:relative;z-index:1;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px;}
.crumbs a{color:var(--text-3);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:#C3CEDA;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--teal-light);color:#0A7A6D;font-size:13px;font-weight:600;
  padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--teal);}
.page-hero h1{
  font-size:30px;line-height:1.28;font-weight:700;color:var(--text);
  letter-spacing:-.2px;max-width:760px;
}
.page-hero .hero-lead{
  margin-top:16px;font-size:17px;line-height:1.7;color:var(--text-2);max-width:660px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  background:#fff;border:1px solid var(--border);color:var(--text-2);
  font-size:13px;padding:6px 13px;border-radius:999px;box-shadow:var(--shadow-1);
}
.tag b{color:var(--brand-dark);font-weight:600;}
.tag-teal{background:var(--teal-light);border-color:transparent;color:#0A7A6D;font-weight:600;box-shadow:none;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}

@media (min-width:480px){
  .page-hero h1{font-size:34px;}
}
@media (min-width:768px){
  .page-hero{padding:148px 0 78px;}
  .page-hero h1{font-size:38px;}
  .page-hero .hero-lead{font-size:18px;}
}
@media (min-width:1024px){
  .page-hero{padding:160px 0 88px;}
  .page-hero h1{font-size:42px;}
}

/* ============ 主体布局 ============ */
.page-body{padding:56px 0 24px;}
.layout{display:grid;grid-template-columns:1fr;gap:32px;align-items:start;}
@media (min-width:1024px){
  .layout{grid-template-columns:236px minmax(0,1fr);gap:48px;}
}

/* 目录侧栏 */
.toc-mobile{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:14px 18px;box-shadow:var(--shadow-1);margin-bottom:28px;
}
.toc-mobile summary{
  cursor:pointer;font-weight:600;color:var(--brand-dark);font-size:15px;list-style:none;
  display:flex;align-items:center;justify-content:space-between;
}
.toc-mobile summary::-webkit-details-marker{display:none;}
.toc-mobile summary::after{content:"＋";color:var(--brand);font-weight:600;}
.toc-mobile[open] summary::after{content:"－";}
.toc-mobile ul{margin-top:10px;border-top:1px solid var(--divider);padding-top:10px;}
.toc-mobile li a{display:block;padding:9px 0;font-size:14px;color:var(--text-2);border-bottom:1px dashed var(--divider);}
.toc-mobile li:last-child a{border-bottom:0;}
.toc-mobile li a:hover{color:var(--brand);}
.toc-desktop{display:none;}
@media (min-width:1024px){
  .toc-mobile{display:none;}
  .toc-desktop{
    display:block;position:sticky;top:88px;
    background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
    padding:22px 20px;box-shadow:var(--shadow-1);
  }
  .toc-desktop h2{font-size:13px;letter-spacing:2px;color:var(--text-3);font-weight:600;margin-bottom:14px;}
  .toc-desktop li a{
    display:block;padding:9px 12px;border-radius:9px;font-size:14px;color:var(--text-2);
    border-left:2px solid transparent;
  }
  .toc-desktop li a:hover{background:var(--brand-xlight);color:var(--brand-dark);}
  .toc-desktop li a.current{background:var(--brand-light);color:var(--brand-dark);font-weight:600;border-left-color:var(--brand);}
}

/* 板块 */
.section{margin-bottom:56px;}
.section:last-child{margin-bottom:0;}
.section-head{margin-bottom:26px;}
.section-head .eyebrow{
  display:block;font-size:13px;letter-spacing:2px;color:var(--brand);font-weight:600;margin-bottom:10px;
}
.section-head h2{font-size:24px;line-height:1.35;font-weight:700;color:var(--text);}
.section-head p{margin-top:12px;font-size:16px;color:var(--text-2);max-width:720px;}
@media (min-width:768px){
  .section-head h2{font-size:28px;}
}
@media (min-width:1024px){
  .section-head h2{font-size:30px;}
  .section{margin-bottom:72px;}
}

/* ============ 行卡对照清单 ============ */
.rowlist{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);overflow:hidden;
}
.rowcard{
  position:relative;display:grid;grid-template-columns:1fr;gap:10px;
  padding:22px 20px;border-bottom:1px solid var(--divider);
  transition:background-color var(--ease),padding var(--ease);
}
.rowcard:last-child{border-bottom:0;}
.rowcard::before{
  content:"";position:absolute;left:0;top:20px;bottom:20px;width:3px;border-radius:0 3px 3px 0;
  background:var(--brand);opacity:0;transition:opacity var(--ease);
}
.rowcard:hover{background:var(--brand-xlight);}
.rowcard:hover::before{opacity:1;}
.rowcard-label{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.rowcard-code{
  font-family:"Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:13px;font-weight:600;color:var(--text-3);letter-spacing:1px;
}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;padding:4px 11px;border-radius:999px;
  background:var(--brand-light);color:var(--brand-dark);
}
.chip-teal{background:var(--teal-light);color:#0A7A6D;}
.chip-warn{background:#FCF3E4;color:#9A5F0D;}
.chip-danger{background:#FBECEA;color:#9E2F22;}
.rowcard h3{font-size:17px;font-weight:600;line-height:1.5;color:var(--text);}
.rowcard p{font-size:15px;color:var(--text-2);line-height:1.75;}
.rowcard .meta{margin-top:6px;font-size:13px;color:var(--text-3);}
@media (min-width:768px){
  .rowcard{grid-template-columns:212px minmax(0,1fr);gap:32px;padding:26px 24px;}
  .rowcard-label{flex-direction:column;align-items:flex-start;gap:8px;}
  .rowcard h3{font-size:17px;}
}

/* ============ 快速自查时间线 ============ */
.steps{display:grid;grid-template-columns:1fr;gap:18px;}
.step{
  display:flex;gap:16px;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius-card);padding:22px 20px;box-shadow:var(--shadow-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(37,99,168,.3);}
.step-num{
  flex-shrink:0;width:34px;height:34px;border-radius:50%;
  border:1px solid var(--brand);color:var(--brand);background:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:"Inter",ui-monospace,monospace;font-size:14px;font-weight:600;
}
.step h3{font-size:16px;font-weight:600;margin-bottom:6px;}
.step p{font-size:14px;color:var(--text-2);}
@media (min-width:768px){
  .steps{grid-template-columns:repeat(2,1fr);}
}
@media (min-width:1024px){
  .steps{grid-template-columns:repeat(4,1fr);gap:22px;}
  .step{flex-direction:column;gap:14px;padding:24px 22px;}
}

/* ============ 图文说明区块 ============ */
.split{
  display:grid;grid-template-columns:1fr;gap:24px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);
}
.split-media{position:relative;min-height:210px;}
.split-media img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.split-body{padding:26px 22px 30px;}
.split-body h3{font-size:20px;font-weight:700;margin-bottom:12px;}
.split-body p{font-size:15px;color:var(--text-2);}
.checklist{margin-top:18px;display:grid;gap:10px;}
.checklist li{display:flex;gap:10px;font-size:15px;color:var(--text-2);}
.checklist li::before{
  content:"";flex-shrink:0;width:16px;height:16px;margin-top:6px;border-radius:50%;
  background:var(--teal-light);
  border:1px solid var(--teal);
  box-shadow:inset 0 0 0 3px #fff;
}
@media (min-width:768px){
  .split{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);}
  .split.reverse .split-media{order:2;}
  .split-body{padding:34px 30px;}
}

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:1fr;gap:26px;}
.faq-side h2{font-size:24px;font-weight:700;line-height:1.35;}
.faq-side p{margin-top:12px;font-size:15px;color:var(--text-2);max-width:320px;}
.faq-side .faq-note{
  margin-top:18px;background:var(--brand-light);color:var(--brand-dark);
  border-radius:12px;padding:14px 16px;font-size:14px;line-height:1.7;
}
.accordion{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden;}
.acc-item{border-bottom:1px solid var(--divider);}
.acc-item:last-child{border-bottom:0;}
.acc-trigger{
  width:100%;display:flex;align-items:flex-start;gap:16px;justify-content:space-between;
  padding:20px 22px;text-align:left;font-size:16px;font-weight:600;color:var(--text);
  transition:color var(--ease),background-color var(--ease);
  position:relative;
}
.acc-trigger:hover{color:var(--brand);background:var(--brand-xlight);}
.acc-trigger .acc-icon{
  flex-shrink:0;width:24px;height:24px;border-radius:50%;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;color:var(--brand);
  font-size:15px;line-height:1;transition:transform 180ms ease-out,background-color var(--ease),border-color var(--ease);
}
.acc-item.open .acc-trigger{color:var(--brand-dark);}
.acc-item.open .acc-trigger::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;background:var(--brand);border-radius:0 3px 3px 0;
}
.acc-item.open .acc-icon{transform:rotate(180deg);background:var(--brand-light);border-color:var(--brand-light);}
.acc-panel{
  max-height:0;overflow:hidden;transition:max-height 240ms ease-out;
}
.acc-panel-inner{padding:0 22px 22px 62px;font-size:15px;color:var(--text-2);line-height:1.8;}
@media (min-width:1024px){
  .faq-layout{grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:48px;}
  .faq-side h2{font-size:30px;}
}

/* ============ 数据带 ============ */
.stat-band{
  display:grid;grid-template-columns:1fr;gap:1px;background:var(--border);
  border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;
}
.stat-band .stat{background:var(--card);padding:24px 22px;}
.stat .stat-num{
  font-family:"Inter",ui-monospace,monospace;font-size:28px;font-weight:700;color:var(--brand-dark);letter-spacing:-.5px;
}
.stat .stat-label{margin-top:6px;font-size:14px;color:var(--text-2);}
@media (min-width:768px){
  .stat-band{grid-template-columns:repeat(3,1fr);}
}

/* ============ CTA ============ */
.cta-block{
  margin-top:8px;
  background:linear-gradient(135deg,var(--brand-light) 0%,#F4F9FE 100%);
  border:1px solid rgba(37,99,168,.18);
  border-radius:18px;padding:32px 24px;
}
.cta-block h2{font-size:22px;font-weight:700;line-height:1.4;}
.cta-block p{margin-top:12px;font-size:15px;color:var(--text-2);max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}
@media (min-width:768px){
  .cta-block{padding:44px 40px;}
  .cta-block h2{font-size:26px;}
}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:64px;background:#0F2A47;color:#C7D6E6;padding:56px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;}
.footer-brand .brand-main{color:#fff;}
.footer-brand .brand-sub{color:#8CA3BA;}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:#9FB4C9;max-width:340px;}
.footer-col h4{font-size:15px;color:#fff;font-weight:600;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a{font-size:14px;color:#9FB4C9;}
.footer-col ul li a:hover{color:#fff;}
.footer-col p{font-size:14px;line-height:1.8;color:#9FB4C9;max-width:320px;}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.10);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#8299B0;
}
@media (min-width:768px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
}

/* ============ 返回顶部 & 移动端固定条 ============ */
.back-top{
  position:fixed;right:16px;bottom:78px;width:48px;height:48px;border-radius:50%;
  background:#fff;border:1px solid var(--brand);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-2);opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity 200ms ease-out,transform 200ms ease-out,visibility 200ms ease-out;
  z-index:70;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{background:var(--brand-light);}
.back-top svg{width:18px;height:18px;}

.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:75;
  display:flex;align-items:center;gap:14px;justify-content:space-between;
  height:56px;padding:0 16px calc(0px + env(safe-area-inset-bottom,0px));
  background:#fff;border-top:1px solid var(--border);
  box-shadow:0 -6px 18px rgba(23,60,110,.10);
}
.mobile-bar span{font-size:14px;color:var(--text-2);}
.mobile-bar .btn-primary{padding:9px 18px;font-size:14px;}
@media (min-width:768px){
  .mobile-bar{display:none;}
  .back-top{bottom:28px;right:28px;}
}
@media (max-width:767px){
  .site-footer{padding-bottom:64px;}
}

@media (min-width:1024px){
  .nav-toggle{display:none;}
  .nav-links{display:flex;}
  .header-actions{margin-left:auto;}
}
@media (max-width:1023px){
  .header-actions{display:none;}
  .site-header{background:rgba(255,255,255,.94);}
}