/* roulang page: index */
/* ============ 1. 设计变量 ============ */
:root{
  --brand:#2B59FF;
  --brand-dark:#16309E;
  --brand-soft:#EAF0FF;
  --cyan:#00B39B;
  --orange:#FF6A3D;
  --bg:#F5F7FC;
  --bg-alt:#EEF2FA;
  --white:#FFFFFF;
  --ink:#0E1726;
  --ink-2:#4A5670;
  --ink-3:#8A93A6;
  --line:#E2E8F5;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(20,40,100,.06),0 8px 24px rgba(20,40,100,.06);
  --shadow-lg:0 16px 40px rgba(20,40,100,.10);
  --maxw:1200px;
}

/* ============ 2. 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","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--ink);letter-spacing:0;}
h1{font-size:44px;line-height:1.25;}
h2{font-size:30px;}
h3{font-size:20px;font-weight:600;line-height:1.5;}
h4{font-size:16px;font-weight:600;}
p{margin:0 0 14px;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand-dark);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand);text-decoration:underline;}
button{font-family:inherit;cursor:pointer;border:0;background:none;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;
}
::selection{background:var(--brand-soft);color:var(--brand-dark);}

/* ============ 3. 容器与栅格（覆盖 Foundation 默认） ============ */
.container{width:100%;max-width:1248px;margin:0 auto;padding:0 24px;}
.row{max-width:none;margin-left:-12px;margin-right:-12px;}
.row::before,.row::after{content:" ";display:table;}
.row::after{clear:both;}
.columns{float:left;width:100%;padding-left:12px;padding-right:12px;}
@media screen and (min-width:768px){
  .medium-6{width:50%;}
  .medium-4{width:33.3333%;}
}
@media screen and (min-width:1024px){
  .large-3{width:25%;}
  .large-4{width:33.3333%;}
  .large-5{width:41.6667%;}
  .large-6{width:50%;}
  .large-7{width:58.3333%;}
  .large-8{width:66.6667%;}
  .large-12{width:100%;}
}

/* ============ 4. 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:transform .18s ease,background .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease;
}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(43,89,255,.24);}
.btn-primary:hover{background:#1F47E0;color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(43,89,255,.32);}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(43,89,255,.24);}
.btn-outline{background:#fff;border-color:var(--line);color:var(--brand-dark);}
.btn-outline:hover{background:var(--brand-soft);border-color:#B9C9FF;color:var(--brand-dark);transform:translateY(-1px);}
.btn-white{background:#fff;color:var(--brand-dark);box-shadow:0 8px 20px rgba(8,20,60,.18);}
.btn-white:hover{background:#F3F6FF;color:var(--brand-dark);transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  font-size:13px;font-weight:600;line-height:1.4;
  background:var(--brand-soft);color:var(--brand-dark);
}
.badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);}
.badge-cyan{background:rgba(0,179,155,.10);color:#068071;}
.badge-cyan::before{background:var(--cyan);}

.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand-dark);
  transition:gap .18s ease,color .18s ease;
}
.text-link:hover{color:var(--brand);gap:10px;text-decoration:none;}

.section{padding:80px 0;}
.section--alt{background:var(--bg-alt);}
.section--white{background:#fff;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.section-head h2{margin:14px 0 10px;}
.section-desc{font-size:15px;color:var(--ink-2);max-width:620px;margin:0;}

/* ============ 5. 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:200;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(20,40,100,.08);}
.header-inner{display:flex;align-items:center;gap:40px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand:hover{text-decoration:none;}
.brand-mark{
  position:relative;width:26px;height:26px;border-radius:8px;background:var(--brand);
  box-shadow:0 4px 10px rgba(43,89,255,.28);flex:0 0 auto;
}
.brand-mark::after{
  content:"";position:absolute;left:7px;top:7px;width:12px;height:12px;
  border-radius:3px;background:#fff;transform:rotate(45deg);
}
.brand-text{display:flex;flex-direction:column;line-height:1.12;}
.brand-top{font-size:16px;font-weight:800;color:var(--ink);letter-spacing:-.01em;}
.brand-bottom{font-size:12px;font-weight:600;color:var(--brand);letter-spacing:.06em;}

.main-nav{display:flex;align-items:center;gap:26px;margin-right:auto;}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 2px;font-size:15px;color:var(--ink-2);font-weight:500;
  transition:color .18s ease,background .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:2px;right:2px;bottom:2px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-link:hover{color:var(--brand);text-decoration:none;}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{
  color:var(--brand-dark);font-weight:600;
  background:var(--brand-soft);border-radius:8px;padding:8px 12px;
}
.nav-link.active::after{display:none;}

.header-actions{display:flex;align-items:center;gap:16px;flex:0 0 auto;}
.cmd-search{
  display:flex;align-items:center;gap:8px;
  width:248px;height:40px;padding:0 10px;
  background:#F2F5FB;border:1px solid transparent;border-radius:10px;
  transition:background .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.cmd-search svg{flex:0 0 auto;color:var(--ink-3);}
.cmd-search:focus-within{
  background:#fff;border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(43,89,255,.12);
}
.cmd-search input{
  flex:1 1 auto;width:100%;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink);font-family:inherit;
}
.cmd-search input::placeholder{color:var(--ink-3);}
.cmd-search kbd{
  flex:0 0 auto;font-family:inherit;font-size:11px;color:var(--ink-3);
  background:#fff;border:1px solid var(--line);border-radius:5px;padding:1px 6px;
}
.ghost-link{font-size:14px;color:var(--ink-2);font-weight:500;}
.ghost-link:hover{color:var(--brand);text-decoration:none;}

.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
  border:1px solid var(--line);background:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.22s;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;inset:0 0 0 auto;width:min(86vw,340px);z-index:300;
  background:#fff;box-shadow:-16px 0 48px rgba(20,40,100,.16);
  transform:translateX(105%);transition:transform .28s ease;
  padding:20px 20px 30px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-close{width:40px;height:40px;border-radius:10px;background:#F2F5FB;color:var(--ink-2);font-size:20px;line-height:1;}
.drawer-link{
  display:flex;align-items:center;min-height:48px;padding:0 12px;margin-top:8px;
  border-top:1px solid var(--line);font-size:15px;color:var(--ink);border-radius:8px;
}
.drawer-link:first-of-type{margin-top:16px;}
.drawer-link.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:600;}
.drawer-cta{margin-top:22px;}
.scrim{position:fixed;inset:0;background:rgba(14,23,38,.42);opacity:0;visibility:hidden;transition:.28s;z-index:250;}
.scrim.is-open{opacity:1;visibility:visible;}

@media screen and (max-width:1023px){
  .main-nav,.cmd-search,.ghost-link{display:none;}
  .nav-toggle{display:flex;}
  .header-inner{height:60px;gap:16px;}
  .header-actions{margin-left:auto;gap:12px;}
}

/* ============ 6. Hero ============ */
.hero{
  position:relative;background:#fff;overflow:hidden;
  padding:64px 0 76px;
}
.hero::before{
  content:"";position:absolute;top:-160px;right:-120px;width:640px;height:640px;
  background:radial-gradient(circle at center,rgba(43,89,255,.16),rgba(43,89,255,0) 68%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(43,89,255,.16) 1px,transparent 1px);
  background-size:20px 20px;
  -webkit-mask-image:linear-gradient(120deg,rgba(0,0,0,.55),transparent 62%);
          mask-image:linear-gradient(120deg,rgba(0,0,0,.55),transparent 62%);
}
.hero .container{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:1fr;gap:40px;align-items:center;}
.hero-copy h1{margin:18px 0 18px;max-width:16em;}
.hero-sub{font-size:17px;line-height:1.8;color:var(--ink-2);max-width:30em;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.hero-stats{display:flex;flex-wrap:wrap;align-items:center;gap:0;}
.hero-stats li{display:flex;flex-direction:column;padding:0 22px;border-left:1px solid var(--line);}
.hero-stats li:first-child{padding-left:0;border-left:0;}
.hero-stats strong{font-size:20px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;}
.hero-stats span{font-size:13px;color:var(--ink-3);}

.hero-visual{position:relative;}
.hero-image{
  position:relative;border-radius:20px;overflow:hidden;background:#E8EDFA;
  box-shadow:var(--shadow-lg);aspect-ratio:5/4;
}
.hero-image img{width:100%;height:100%;object-fit:cover;}
.hero-image::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(255,255,255,.14),rgba(22,48,158,.30));
}
.float-card{
  position:absolute;background:#fff;border-radius:16px;padding:14px 16px;
  box-shadow:0 16px 40px rgba(20,40,100,.16);border:1px solid #EFF3FC;
}
.float-card-1{left:-16px;bottom:32px;max-width:250px;}
.float-card-1 .fc-label{display:block;font-size:12px;color:var(--ink-3);letter-spacing:.04em;}
.float-card-1 strong{display:block;font-size:15px;color:var(--ink);margin:3px 0 4px;}
.float-card-1 .fc-note{font-size:12px;color:var(--brand);font-weight:600;}
.float-card-2{right:-12px;top:26px;display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--ink-2);}
.dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(0,179,155,.16);}

@media screen and (min-width:1024px){
  .hero-grid{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;}
}
@media screen and (max-width:767px){
  .hero{padding:40px 0 48px;}
  .hero-copy h1{font-size:30px;}
  .hero-sub{font-size:15px;}
  .hero-stats{gap:16px 0;}
  .hero-stats li{padding:0 16px;}
  .float-card-1{left:8px;bottom:12px;max-width:210px;}
  .float-card-2{display:none;}
  .hero-actions .btn{width:100%;}
}

/* ============ 7. 指标带 ============ */
.metrics{background:var(--bg-alt);padding:36px 0;}
.metric{text-align:left;padding:8px 0;border-left:1px solid rgba(43,89,255,.14);padding-left:22px;}
.metric:first-child{border-left:0;padding-left:12px;}
.metric-num{
  display:block;font-size:32px;font-weight:800;color:var(--ink);
  font-variant-numeric:tabular-nums;line-height:1.2;letter-spacing:-.01em;
}
.metric-num em{font-style:normal;font-size:16px;font-weight:600;color:var(--brand);margin-left:4px;}
.metric-label{display:block;font-size:14px;color:var(--ink-2);margin-top:4px;}
@media screen and (max-width:767px){
  .metrics{padding:24px 0;}
  .metric{padding:14px 0 14px 16px;margin-bottom:0;}
  .metric:nth-child(odd){border-left:0;padding-left:12px;}
  .metric-num{font-size:26px;}
}

/* ============ 8. 玩法步骤 ============ */
.flow-aside h2{margin:14px 0 12px;}
.step-list{position:relative;padding-left:6px;}
.step-list::before{
  content:"";position:absolute;left:23px;top:14px;bottom:14px;width:1px;
  background:linear-gradient(180deg,rgba(43,89,255,.34),rgba(43,89,255,.06));
}
.step-item{position:relative;display:flex;gap:18px;padding:0 0 26px;}
.step-item:last-child{padding-bottom:0;}
.step-num{
  position:relative;z-index:2;flex:0 0 auto;
  width:36px;height:36px;border-radius:50%;background:#fff;
  border:1.5px solid var(--brand);color:var(--brand-dark);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;
}
.step-body{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 20px;flex:1 1 auto;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease;}
.step-body:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);}
.step-body h3{margin-bottom:4px;font-size:18px;}
.step-body p{font-size:14px;color:var(--ink-2);margin:0;}

/* ============ 9. 奖励轨道 ============ */
.track{margin:8px 0 36px;}
.track-bar{position:relative;height:8px;border-radius:999px;background:#DFE6F6;overflow:hidden;}
.track-fill{display:block;height:100%;width:64%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--cyan));}
.track-nodes{display:flex;justify-content:space-between;margin-top:-12px;padding:0 2px;}
.track-nodes li{display:flex;flex-direction:column;align-items:center;gap:6px;flex:1 1 0;}
.node-dot{width:16px;height:16px;border-radius:50%;background:#fff;border:2px solid #C9D5F0;}
.track-nodes li.done .node-dot{border-color:var(--brand);background:var(--brand);}
.track-nodes li.current .node-dot{border-color:var(--cyan);background:#fff;box-shadow:0 0 0 4px rgba(0,179,155,.16);}
.node-label{font-size:13px;color:var(--ink-3);text-align:center;}
.track-nodes li.current .node-label{color:var(--cyan);font-weight:600;}
.track-nodes li.done .node-label{color:var(--ink-2);}

.reward-grid{display:grid;grid-template-columns:1fr;gap:20px;}
.reward-card{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;
  box-shadow:var(--shadow);display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.reward-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#CBD9FF;}
.reward-card-main{background:var(--brand-soft);border-color:#C3D2FF;}
.reward-card h3{margin:12px 0 8px;font-size:19px;}
.reward-card p{font-size:14px;color:var(--ink-2);}
.reward-rule{height:1px;background:rgba(43,89,255,.16);margin:16px 0 14px;}
.reward-point{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-dark);}
.reward-point::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);}
@media screen and (min-width:768px){
  .reward-grid{grid-template-columns:1.4fr 1fr 1fr;}
}

/* ============ 10. 任务进度 ============ */
.progress-panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:var(--shadow);height:100%;}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px;}
.muted{font-size:13px;color:var(--ink-3);}
.progress-value{font-size:44px;font-weight:800;color:var(--ink);line-height:1;font-variant-numeric:tabular-nums;letter-spacing:-.02em;}
.progress-value span{font-size:20px;color:var(--brand);margin-left:4px;}
.progress-bar{position:relative;height:10px;border-radius:999px;background:#E4EAF8;margin:16px 0 24px;overflow:hidden;}
.progress-bar-fill{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--cyan));}
.task-list li{display:flex;align-items:center;gap:12px;padding:12px 0;border-top:1px solid var(--line);}
.task-list li:first-child{border-top:0;}
.status{flex:0 0 auto;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;}
.status-done{background:rgba(0,179,155,.12);color:#068071;}
.status-doing{background:var(--brand-soft);color:var(--brand-dark);}
.task-name{flex:1 1 auto;font-size:14px;color:var(--ink);}
.task-link{font-size:13px;font-weight:600;color:var(--brand-dark);}
.task-link:hover{color:var(--brand);}

.panel-dark{background:#0E1726;border-radius:16px;padding:26px;color:#fff;height:100%;display:flex;flex-direction:column;box-shadow:0 20px 48px rgba(14,23,38,.22);}
.panel-dark img{border-radius:12px;aspect-ratio:16/9;object-fit:cover;margin-bottom:18px;}
.panel-dark h3{color:#fff;margin-bottom:10px;}
.panel-dark p{color:rgba(255,255,255,.72);font-size:14px;}
.tick-list{margin-top:14px;display:grid;gap:10px;}
.tick-list li{position:relative;padding-left:20px;font-size:14px;color:rgba(255,255,255,.84);}
.tick-list li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:var(--cyan);}
@media screen and (max-width:1023px){
  .panel-dark{margin-top:20px;}
}

/* ============ 11. 登录 CTA 条 ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:20px;
  padding:48px 40px;text-align:center;color:#fff;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.cta-band::before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(22,48,158,.86),rgba(14,23,38,.80));}
.cta-band > *{position:relative;z-index:2;}
.cta-band h2{color:#fff;margin-bottom:12px;}
.cta-band p{color:rgba(255,255,255,.82);max-width:640px;margin:0 auto 26px;font-size:15px;}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:20px;}
.cta-link{color:#fff;font-size:14px;font-weight:600;text-decoration:underline;text-underline-offset:4px;}
.cta-link:hover{color:#DCE6FF;}
.cta-inner{max-width:880px;margin:0 auto;}
@media screen and (max-width:767px){
  .cta-band{padding:32px 20px;border-radius:16px;}
  .cta-actions .btn{width:100%;}
}

/* ============ 12. 最新信息列表 ============ */
.news-list{margin-top:4px;}
.news-col{margin-bottom:16px;}
.news-card{
  display:flex;gap:16px;background:#fff;border:1px solid var(--line);
  border-radius:16px;padding:14px;height:100%;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:#CBD9FF;}
.news-thumb{flex:0 0 152px;border-radius:12px;overflow:hidden;background:#EEF2FA;}
.news-thumb img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;}
.news-body{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;}
.news-cat{
  display:inline-flex;align-self:flex-start;padding:2px 10px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);font-size:12px;font-weight:600;margin-bottom:8px;
}
.news-title{
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.55;margin:0 0 6px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card:hover .news-title{color:var(--brand);}
.news-summary{
  font-size:13px;color:var(--ink-2);margin:0 0 10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:var(--ink-3);}
.news-arrow{display:inline-flex;align-items:center;gap:4px;color:var(--brand-dark);font-weight:600;transition:transform .18s ease;}
.news-card:hover .news-arrow{transform:translateX(4px);}
.empty-state{
  background:#fff;border:1px dashed #C9D5F0;border-radius:16px;
  padding:44px 24px;text-align:center;max-height:240px;
}
.empty-state .empty-icon{
  width:48px;height:48px;margin:0 auto 14px;border-radius:14px;background:#EEF2FA;
  display:flex;align-items:center;justify-content:center;color:#9AA7C2;
}
.empty-state p{color:var(--ink-3);font-size:14px;margin-bottom:16px;}
@media screen and (max-width:520px){
  .news-card{flex-direction:column;}
  .news-thumb{flex:1 1 auto;}
  .news-thumb img{aspect-ratio:16/9;}
}

/* ============ 13. FAQ ============ */
.faq-list{max-width:880px;margin:0 auto;display:grid;gap:12px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;}
.faq-item.is-open{border-color:#C3D2FF;box-shadow:var(--shadow);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;
  text-align:left;padding:18px 20px;font-size:16px;font-weight:600;color:var(--ink);
  background:none;line-height:1.6;
}
.faq-q:hover{color:var(--brand-dark);}
.faq-icon{position:relative;flex:0 0 auto;width:20px;height:20px;border-radius:50%;background:var(--brand-soft);}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-dark);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .24s ease,opacity .24s ease;
}
.faq-icon::before{width:9px;height:2px;}
.faq-icon::after{width:2px;height:9px;}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .28s ease;}
.faq-a > div{overflow:hidden;}
.faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--ink-2);margin:0;}
.faq-item.is-open .faq-a{grid-template-rows:1fr;}

/* ============ 14. 次级转化带 ============ */
.mini-band{
  background:var(--brand-soft);border:1px solid #D3DEFF;border-radius:16px;
  padding:22px 26px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
}
.mini-band p{margin:0;font-size:15px;color:var(--brand-dark);font-weight:600;}
@media screen and (max-width:767px){
  .mini-band .btn{width:100%;}
}

/* ============ 15. 页脚 ============ */
.site-footer{background:#F2F5FB;border-top:1px solid var(--line);padding:56px 0 0;margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
.footer-brand p{font-size:14px;color:var(--ink-2);margin:14px 0 12px;max-width:22em;}
.footer-tag{display:inline-block;font-size:12px;color:var(--ink-3);background:#fff;border:1px solid var(--line);border-radius:999px;padding:4px 12px;}
.footer-col h4{font-size:14px;color:var(--ink);margin-bottom:14px;letter-spacing:.02em;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:var(--ink-2);}
.footer-col a:hover{color:var(--brand);text-decoration:none;}
.footer-bottom{
  margin-top:44px;border-top:1px solid var(--line);padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-3);
}
@media screen and (min-width:768px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;}
}
@media screen and (max-width:767px){
  .section{padding:44px 0;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
}

/* roulang page: article */
:root{
  --brand:#2B59FF;
  --brand-dark:#16309E;
  --brand-soft:#EAF0FF;
  --teal:#00B39B;
  --orange:#FF6A3D;
  --bg:#F5F7FC;
  --surface:#FFFFFF;
  --alt:#EEF2FA;
  --ink:#0E1726;
  --muted:#4A5670;
  --faint:#8A93A6;
  --line:#E2E8F5;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --shadow-1:0 1px 2px rgba(20,40,100,.06),0 8px 24px rgba(20,40,100,.06);
  --shadow-2:0 16px 40px rgba(20,40,100,.10);
  --container:1200px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",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);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:var(--brand-dark);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand);text-decoration:underline;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
button,input{font-family:inherit;}
h1,h2,h3,h4,h5{margin:0;letter-spacing:0;color:var(--ink);}
p{margin:0;}
ul,ol{margin:0;padding:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 18px rgba(20,40,100,.08);}
.header-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  height:72px;display:flex;align-items:center;gap:40px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;text-decoration:none;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:26px;height:26px;border-radius:8px;flex:0 0 auto;position:relative;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-dark) 55%,var(--teal) 100%);
}
.brand-mark::after{content:"";position:absolute;inset:8px;border-radius:3px;background:#fff;opacity:.92;}
.brand-text{display:flex;flex-direction:column;line-height:1.12;}
.brand-top{font-size:15px;font-weight:700;letter-spacing:.02em;color:var(--ink);}
.brand-bottom{font-size:10px;letter-spacing:.18em;color:var(--muted);}
.main-nav{display:flex;align-items:center;gap:4px;margin-right:auto;}
.nav-link{
  position:relative;display:inline-block;padding:9px 12px;border-radius:999px;
  font-size:15px;color:var(--muted);transition:color .18s ease,background .18s ease;
}
.nav-link::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 .22s ease;
}
.nav-link:hover{color:var(--brand);text-decoration:none;}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand-dark);background:var(--brand-soft);font-weight:600;}
.nav-link.active::after{display:none;}
.header-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto;}
.command-search{
  display:flex;align-items:center;gap:8px;height:44px;width:248px;
  padding:0 10px 0 14px;border-radius:10px;background:#F2F5FB;
  border:1px solid transparent;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.command-search i{font-size:13px;color:var(--faint);}
.command-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;color:var(--ink);height:100%;}
.command-search input::placeholder{color:var(--faint);}
.command-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 4px rgba(43,89,255,.12);}
.command-search kbd{
  font-family:var(--font);font-size:11px;color:var(--faint);background:#fff;
  border:1px solid var(--line);border-radius:6px;padding:2px 6px;white-space:nowrap;
}
.ghost-link{font-size:14px;color:var(--muted);padding:8px 2px;white-space:nowrap;}
.ghost-link:hover{color:var(--brand);text-decoration:none;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(43,89,255,.22);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(43,89,255,.28);}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink);}
.btn-outline:hover{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-dark);transform:translateY(-1px);}
.btn-white{background:#fff;color:var(--brand-dark);box-shadow:0 8px 20px rgba(0,0,0,.14);}
.btn-white:hover{background:#F2F5FB;color:var(--brand-dark);transform:translateY(-1px);}
.btn-block{width:100%;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:#fff;color:var(--ink);cursor:pointer;
}
.mobile-drawer{display:none;background:#fff;border-top:1px solid var(--line);padding:6px 24px 18px;}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{
  display:block;padding:14px 4px;font-size:15px;color:var(--ink);
  border-bottom:1px solid var(--line);text-decoration:none;
}
.mobile-drawer a:last-child{border-bottom:0;}

/* ---------- 文章页主体 ---------- */
.article-shell{padding:30px 0 0;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--faint);
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#C6CFE4;}
.breadcrumb .current{color:var(--brand-dark);font-weight:600;max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

.article-layout{
  display:grid;
  grid-template-columns:minmax(0,780px) 280px;
  gap:60px;
  justify-content:center;
  align-items:start;
  padding:30px 0 8px;
}
.article-head{grid-column:1 / -1;max-width:780px;padding-bottom:26px;border-bottom:1px solid var(--line);}
.post-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:13px;font-weight:600;line-height:1.6;
}
.article-head h1{
  font-size:36px;line-height:1.34;font-weight:700;margin-top:18px;
  word-break:break-word;
}
.article-head .head-rule{width:48px;height:3px;border-radius:2px;background:var(--brand);margin:20px 0 16px;}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--faint);}
.post-meta .dot{width:3px;height:3px;border-radius:50%;background:#C6CFE4;}
.post-meta i{color:var(--faint);font-size:13px;}

.article-main{min-width:0;}
.prose{font-size:16px;line-height:1.85;color:var(--ink);word-break:break-word;}
.prose p{margin:0 0 1.2em;}
.prose h2{
  position:relative;font-size:22px;line-height:1.55;font-weight:700;
  margin:44px 0 16px;padding-left:15px;scroll-margin-top:100px;
}
.prose h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;
  border-radius:2px;background:var(--brand);
}
.prose h3{font-size:18px;font-weight:600;line-height:1.6;margin:30px 0 12px;scroll-margin-top:100px;}
.prose h4{font-size:16px;font-weight:600;margin:24px 0 10px;}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:22px;}
.prose ul{list-style:none;padding-left:4px;}
.prose ul li{position:relative;padding-left:18px;margin-bottom:.55em;}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;
  background:rgba(43,89,255,.6);
}
.prose ol li{margin-bottom:.55em;}
.prose ol li::marker{color:var(--brand);font-weight:600;}
.prose blockquote{
  margin:26px 0;padding:16px 22px;border-left:3px solid var(--teal);
  background:var(--brand-soft);border-radius:0 12px 12px 0;color:var(--muted);
  font-style:normal;
}
.prose blockquote p:last-child{margin-bottom:0;}
.prose img{border-radius:12px;margin:26px auto;box-shadow:var(--shadow-1);}
.prose figure{margin:26px 0;}
.prose figcaption,.prose .caption{font-size:13px;color:var(--faint);text-align:center;margin-top:10px;}
.prose table{
  width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;
}
.prose th{
  background:var(--brand-soft);color:var(--brand-dark);font-weight:600;
  padding:12px 14px;text-align:left;border:0;
}
.prose td{padding:12px 14px;border:0;border-top:1px solid var(--line);color:var(--muted);}
.prose tbody tr:nth-child(even){background:#F7F9FE;}
.prose a{color:var(--brand-dark);text-decoration:underline;text-underline-offset:3px;}
.prose a:hover{color:var(--brand);}
.prose hr{border:0;border-top:1px solid var(--line);margin:36px 0;}
.prose strong{font-weight:700;color:var(--ink);}
.prose code{
  background:var(--alt);border-radius:6px;padding:2px 6px;
  font-size:14px;color:var(--brand-dark);
}

/* 侧栏 */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px;}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;box-shadow:var(--shadow-1);}
.side-card h3{
  font-size:14px;font-weight:700;margin-bottom:14px;color:var(--ink);
  display:flex;align-items:center;gap:8px;
}
.side-card h3 i{color:var(--brand);font-size:13px;}
.toc-list{list-style:none;display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:block;font-size:14px;line-height:1.55;color:var(--muted);
  padding:7px 10px;border-left:2px solid transparent;border-radius:0 8px 8px 0;
  text-decoration:none;transition:all .16s ease;
}
.toc-list a:hover{color:var(--brand-dark);background:var(--alt);border-left-color:#B9C8F5;text-decoration:none;}
.toc-list li.active a{color:var(--brand-dark);font-weight:600;background:var(--brand-soft);border-left-color:var(--brand);}
.toc-empty{font-size:13px;color:var(--faint);line-height:1.7;}
.side-meta{list-style:none;display:flex;flex-direction:column;gap:10px;font-size:14px;}
.side-meta li{display:flex;justify-content:space-between;gap:12px;color:var(--faint);}
.side-meta li span:last-child{color:var(--muted);font-weight:600;text-align:right;}

/* 空态 */
.empty-state{
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-lg);
  padding:64px 24px;text-align:center;box-shadow:var(--shadow-1);
}
.empty-state .empty-icon{
  width:56px;height:56px;border-radius:16px;margin:0 auto 18px;
  display:flex;align-items:center;justify-content:center;
  background:var(--alt);color:var(--faint);font-size:22px;
}
.empty-state h2{font-size:20px;margin-bottom:10px;}
.empty-state p{font-size:15px;color:var(--muted);margin-bottom:22px;}

/* 相关推荐 */
.related-wrap{max-width:1120px;margin:0 auto;padding:0 24px;}
.related{padding-top:56px;margin-top:56px;border-top:1px solid var(--line);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px;}
.section-tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);font-size:13px;font-weight:600;
}
.section-head h2{font-size:26px;line-height:1.4;font-weight:700;margin-top:12px;}
.section-head p{font-size:14px;color:var(--muted);margin-top:8px;}
.text-link{font-size:14px;font-weight:600;color:var(--brand-dark);white-space:nowrap;}
.text-link i{margin-left:6px;transition:transform .18s ease;}
.text-link:hover{text-decoration:none;color:var(--brand);}
.text-link:hover i{transform:translateX(4px);}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.related-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--shadow-1);color:inherit;text-decoration:none;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#C9D8FF;text-decoration:none;}
.related-card img{width:100%;height:152px;object-fit:cover;}
.related-card .rc-body{padding:16px 18px 20px;}
.rc-tag{
  display:inline-block;padding:3px 10px;border-radius:999px;
  background:var(--alt);color:var(--muted);font-size:12px;font-weight:600;
}
.rc-body h3{font-size:16px;line-height:1.55;font-weight:600;margin:10px 0 8px;color:var(--ink);}
.rc-body p{font-size:13px;line-height:1.7;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.related-card:hover h3{color:var(--brand-dark);}

/* 返回列表条 */
.back-bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:36px;}
.back-bar .hint{font-size:14px;color:var(--faint);}

/* CTA 条 */
.cta-band{
  max-width:1120px;margin:60px auto 0;padding:44px 48px;border-radius:20px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  background:
    linear-gradient(105deg,rgba(22,48,158,.90) 0%,rgba(43,89,255,.80) 100%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color:#fff;box-shadow:0 22px 44px rgba(22,48,158,.20);
}
.cta-band h2{font-size:26px;line-height:1.4;color:#fff;font-weight:700;}
.cta-band p{font-size:15px;color:rgba(255,255,255,.86);margin-top:10px;max-width:560px;}
.cta-actions{display:flex;align-items:center;gap:18px;flex:0 0 auto;}
.cta-actions .link-light{color:#fff;font-size:14px;text-decoration:underline;text-underline-offset:4px;}
.cta-actions .link-light:hover{color:#fff;opacity:.85;}

/* 回到顶部 */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:55;
  width:46px;height:46px;border-radius:50%;cursor:pointer;
  background:#fff;border:1px solid var(--line);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-1);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s ease,box-shadow .22s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:none;}
.to-top:hover{box-shadow:var(--shadow-2);color:var(--brand-dark);}

/* ---------- 页脚 ---------- */
.site-footer{background:#F2F5FB;border-top:1px solid var(--line);padding:56px 0 24px;margin-top:72px;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand p{font-size:14px;line-height:1.75;color:var(--muted);max-width:320px;}
.footer-tag{
  display:inline-block;margin-top:14px;padding:4px 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);font-size:12px;font-weight:600;
}
.footer-col h4{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:16px;}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--muted);}
.footer-col a:hover{color:var(--brand);text-decoration:none;}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--faint);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:40px;}
  .cta-band{padding:40px;}
}
@media (max-width:1099px){
  .command-search{width:200px;}
  .main-nav{gap:0;}
}
@media (max-width:991px){
  .main-nav{display:none;}
  .ghost-link{display:none;}
  .header-inner{gap:16px;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;max-width:820px;margin:0 auto;}
  .article-side{display:none;}
  .article-head h1{font-size:32px;}
}
@media (max-width:860px){
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:767px){
  .header-inner{height:60px;padding:0 20px;gap:12px;}
  .command-search{display:none;}
  .nav-toggle{display:inline-flex;}
  .btn-primary{height:40px;padding:0 16px;font-size:14px;}
  .container{padding:0 20px;}
  .article-shell{padding:22px 0 0;}
  .article-head h1{font-size:27px;margin-top:14px;}
  .article-head .head-rule{margin:16px 0 14px;}
  .post-meta{font-size:13px;gap:8px;}
  .prose{font-size:15px;line-height:1.85;}
  .prose h2{font-size:19px;margin-top:36px;}
  .prose h3{font-size:17px;}
  .related-wrap{padding:0 20px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .section-head h2{font-size:22px;}
  .related{padding-top:44px;margin-top:44px;}
  .cta-band{
    margin:44px 20px 0;padding:32px 24px;flex-direction:column;align-items:flex-start;
    gap:22px;border-radius:16px;
  }
  .cta-band h2{font-size:21px;}
  .cta-actions{flex-direction:column;align-items:stretch;width:100%;gap:14px;}
  .cta-actions .btn{width:100%;}
  .back-bar{flex-direction:column;align-items:stretch;}
  .back-bar .btn{width:100%;}
  .site-footer{margin-top:52px;padding:44px 0 20px;}
  .footer-bottom{flex-direction:column;gap:6px;}
  .to-top{right:16px;bottom:16px;width:42px;height:42px;}
  .prose table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;}
}
@media (max-width:560px){
  .related-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .brand-bottom{letter-spacing:.12em;}
  .article-head h1{font-size:24px;}
  .breadcrumb .current{max-width:100%;white-space:normal;}
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root{
  --blue:#2B59FF;
  --blue-dark:#16309E;
  --blue-soft:#EAF0FF;
  --teal:#00B39B;
  --teal-soft:#E4F7F4;
  --orange:#FF6A3D;
  --bg:#F5F7FC;
  --white:#FFFFFF;
  --alt:#EEF2FA;
  --ink:#0E1726;
  --muted:#4A5670;
  --faint:#8A93A6;
  --line:#E2E8F5;
  --deep:#0F1D46;
  --radius-card:16px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,40,100,.06),0 8px 24px rgba(20,40,100,.06);
  --shadow-2:0 16px 40px rgba(20,40,100,.10);
  --section-y:80px;
}

/* ===== 基础 reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--blue-dark);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--blue);text-decoration:underline}
button{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-radius:4px}
::selection{background:var(--blue-soft);color:var(--blue-dark)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ===== 通用按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;text-decoration:none;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 6px 16px rgba(43,89,255,.24)}
.btn-primary:hover{background:#1e46e0;color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(43,89,255,.30)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(43,89,255,.24)}
.btn-ghost{background:#fff;color:var(--blue-dark);border-color:var(--line);box-shadow:var(--shadow-1)}
.btn-ghost:hover{border-color:var(--blue);background:var(--blue-soft);color:var(--blue-dark);transform:translateY(-1px)}
.btn-white{background:#fff;color:var(--blue-dark);box-shadow:0 10px 24px rgba(6,16,50,.22)}
.btn-white:hover{background:#EAF0FF;color:var(--blue-dark);transform:translateY(-1px)}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn:disabled,.btn.is-disabled{opacity:.45;box-shadow:none;transform:none;cursor:not-allowed}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(20,40,100,.09)}
.header-inner{display:flex;align-items:center;gap:32px;height:72px}

.brand{display:inline-flex;align-items:center;gap:10px;margin-right:8px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{
  position:relative;width:26px;height:26px;border-radius:8px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--blue),var(--blue-dark));
  box-shadow:0 6px 14px rgba(43,89,255,.28);
}
.brand-mark::after{content:"";position:absolute;inset:7px;border:2px solid #fff;border-radius:3px;opacity:.92}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-top{font-size:15px;font-weight:700;color:var(--ink);letter-spacing:.2px}
.brand-bottom{font-size:11px;color:var(--faint);letter-spacing:1px}

.main-nav{display:flex;align-items:center;gap:26px}
.nav-link{
  position:relative;font-size:15px;color:var(--muted);
  padding:7px 2px;border-radius:var(--radius-pill);
  transition:color .2s ease,background .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;
  background:var(--blue);border-radius:2px;transition:right .25s ease;
}
.nav-link:hover{color:var(--blue);text-decoration:none}
.nav-link:hover::after{right:0}
.nav-link.active{
  color:var(--blue-dark);font-weight:600;background:var(--blue-soft);
  padding:7px 15px;
}
.nav-link.active::after{display:none}

.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.nav-search{
  display:flex;align-items:center;gap:8px;width:248px;height:40px;
  padding:0 10px 0 12px;background:#F2F5FB;border:1px solid transparent;
  border-radius:var(--radius-sm);transition:background .2s,border-color .2s,box-shadow .2s;
}
.nav-search:focus-within{background:#fff;border-color:var(--blue);box-shadow:0 0 0 4px rgba(43,89,255,.14)}
.nav-search i{font-size:13px;color:var(--faint)}
.nav-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:13.5px;color:var(--ink)}
.nav-search input::placeholder{color:var(--faint)}
.nav-search kbd{
  font-family:inherit;font-size:11px;color:var(--faint);background:#fff;
  border:1px solid var(--line);border-radius:6px;padding:1px 6px;line-height:1.5;
}
.nav-help{font-size:14px;color:var(--muted)}
.nav-help:hover{color:var(--blue);text-decoration:none}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:#fff;color:var(--ink);cursor:pointer;
}
.nav-toggle:hover{border-color:var(--blue);color:var(--blue)}

.mobile-drawer{display:none;background:#fff;border-top:1px solid var(--line)}
.mobile-drawer.is-open{display:block}
.drawer-inner{padding:8px 24px 24px}
.drawer-link{
  display:block;padding:14px 2px;font-size:16px;color:var(--muted);
  border-bottom:1px solid var(--line);
}
.drawer-link:hover{color:var(--blue);text-decoration:none}
.drawer-link.active{color:var(--blue-dark);font-weight:600}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 12px;
  background:#F2F5FB;border-radius:var(--radius-sm);margin:16px 0;
}
.drawer-search i{color:var(--faint);font-size:13px}
.drawer-search input{flex:1;border:0;background:transparent;outline:none;font-size:14px;min-width:0}

/* ===== 面包屑 ===== */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--faint);margin-bottom:18px}
.breadcrumb a{color:var(--faint)}
.breadcrumb a:hover{color:var(--blue);text-decoration:none}
.breadcrumb .sep{color:#C3CCDE}
.breadcrumb .current{color:var(--blue-dark);font-weight:600}

/* ===== 分类页 Hero ===== */
.page-hero{
  position:relative;overflow:hidden;
  padding:30px 0 44px;
  background:linear-gradient(120deg,#EAF0FF 0%,#F7F9FE 52%,#E6F6F3 100%);
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(43,89,255,.16) 1px,transparent 1px);
  background-size:22px 22px;opacity:.5;pointer-events:none;
}
.page-hero .container{position:relative;z-index:1}
.page-hero h1{
  font-size:44px;line-height:1.25;font-weight:700;color:var(--ink);
  letter-spacing:0;margin-bottom:16px;
}
.page-hero h1 .accent{color:var(--blue-dark)}
.hero-lead{
  max-width:760px;font-size:16px;line-height:1.85;color:var(--muted);
  margin-bottom:24px;
}
.chip-row{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;
  border-radius:var(--radius-pill);border:1px solid var(--line);background:#fff;
  color:var(--muted);font-size:14px;cursor:pointer;
  transition:border-color .2s,color .2s,background .2s,box-shadow .2s,transform .2s;
}
.chip:hover{border-color:var(--blue);color:var(--blue-dark);transform:translateY(-1px)}
.chip.is-active{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(43,89,255,.24)}

/* ===== 板块基础 ===== */
.section{padding:var(--section-y) 0}
.section.tight{padding:56px 0}
.section.alt{background:var(--alt)}
.section.white{background:#fff}
.section-head{max-width:720px;margin-bottom:36px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:var(--radius-pill);
  background:var(--blue-soft);color:var(--blue-dark);
  font-size:13px;font-weight:600;margin-bottom:14px;
}
.eyebrow i{font-size:11px}
.section-head h2{font-size:30px;line-height:1.35;font-weight:700;color:var(--ink);margin-bottom:12px}
.section-head p{font-size:15px;line-height:1.8;color:var(--muted)}

/* ===== 时间轴 ===== */
.timeline{position:relative;max-width:920px}
.timeline::before{
  content:"";position:absolute;left:27px;top:18px;bottom:26px;width:2px;
  background:linear-gradient(180deg,rgba(43,89,255,.45),rgba(0,179,155,.35));
  border-radius:2px;
}
.tl-item{position:relative;display:grid;grid-template-columns:56px 1fr;gap:24px;padding-bottom:24px}
.tl-item:last-child{padding-bottom:0}
.tl-num{
  position:relative;z-index:1;
  width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:#fff;border:2px solid var(--blue);color:var(--blue-dark);
  font-size:16px;font-weight:700;font-variant-numeric:tabular-nums;
  box-shadow:0 6px 16px rgba(43,89,255,.14);
}
.tl-card{
  display:grid;grid-template-columns:220px 1fr;gap:24px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:20px;box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.tl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#CBD9F8}
.tl-figure{margin:0;overflow:hidden;border-radius:12px}
.tl-figure img{width:100%;height:100%;min-height:150px;object-fit:cover;border-radius:12px;transition:transform .35s ease}
.tl-card:hover .tl-figure img{transform:scale(1.04)}
.tl-body h3{font-size:20px;font-weight:600;color:var(--ink);margin-bottom:8px}
.tl-body p{font-size:15px;line-height:1.8;color:var(--muted);margin-bottom:14px}
.text-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--blue-dark);
}
.text-arrow i{transition:transform .22s ease;font-size:12px}
.text-arrow:hover{color:var(--blue);text-decoration:none}
.text-arrow:hover i{transform:translateX(4px)}

/* ===== 深色节奏面板 ===== */
.rhythm-panel{
  position:relative;overflow:hidden;
  background:linear-gradient(140deg,#132A6E 0%,var(--deep) 70%);
  border-radius:20px;padding:44px;color:#fff;
  box-shadow:0 24px 50px rgba(12,26,68,.24);
}
.rhythm-panel::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;
  border-radius:50%;background:radial-gradient(circle,rgba(43,89,255,.42),transparent 68%);
}
.rhythm-panel .rp-head{position:relative;z-index:1;margin-bottom:28px}
.rhythm-panel h2{font-size:26px;font-weight:700;color:#fff;margin-bottom:10px}
.rhythm-panel .rp-head p{font-size:14.5px;color:rgba(255,255,255,.72);max-width:640px;line-height:1.8}
.status-list{position:relative;z-index:1;display:grid;gap:18px}
.status-row{display:grid;grid-template-columns:120px 1fr 88px;align-items:center;gap:16px}
.status-label{font-size:14px;color:rgba(255,255,255,.78)}
.status-track{height:10px;border-radius:999px;background:rgba(255,255,255,.14);overflow:hidden}
.status-fill{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--blue),var(--teal))}
.status-value{font-size:14px;font-weight:700;color:#fff;font-variant-numeric:tabular-nums;text-align:right}
.legend-row{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14)}
.legend{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:rgba(255,255,255,.82);
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius-pill);padding:6px 14px;
}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block}
.dot-live{background:var(--teal)}
.dot-soon{background:#7BA2FF}
.dot-done{background:#8A93A6}

/* ===== 规则区 ===== */
.rule-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:start}
.rule-list{display:grid;gap:16px}
.rule-item{
  display:grid;grid-template-columns:auto 1fr;gap:14px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:18px 20px;box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rule-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:#CBD9F8}
.rule-item .ri-icon{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:var(--blue-soft);color:var(--blue-dark);font-size:14px;
}
.rule-item h3{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:4px}
.rule-item p{font-size:14px;line-height:1.75;color:var(--muted)}
.rule-aside{position:sticky;top:96px}
.rule-aside figure{margin:0;border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-1);border:1px solid var(--line);background:#fff}
.rule-aside img{width:100%;height:300px;object-fit:cover;border-radius:0}
.rule-aside figcaption{font-size:13px;color:var(--faint);padding:14px 18px;line-height:1.7}
.aside-note{
  margin-top:16px;padding:18px 20px;border-radius:14px;
  background:var(--teal-soft);border:1px solid #C9EFE9;
}
.aside-note strong{display:block;font-size:14px;color:#04695C;margin-bottom:6px}
.aside-note p{font-size:13.5px;line-height:1.75;color:#116B60}

/* ===== 常见问题 ===== */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  margin-bottom:12px;padding:0 22px;box-shadow:var(--shadow-1);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:#CBD9F8}
.faq-item[open]{border-color:#BFD1FA;box-shadow:0 12px 30px rgba(20,40,100,.09)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:18px 0;font-size:16px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:focus-visible{outline:2px solid var(--blue);outline-offset:4px}
.faq-icon{
  width:26px;height:26px;flex:0 0 auto;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--blue-soft);color:var(--blue-dark);font-size:12px;
  transition:transform .25s ease,background .2s ease,color .2s ease;
}
.faq-item[open] .faq-icon{transform:rotate(180deg);background:var(--blue);color:#fff}
.faq-body{padding:0 0 20px;font-size:15px;line-height:1.85;color:var(--muted);border-top:1px solid var(--line);margin-top:-2px;padding-top:16px}

/* ===== 互链卡 ===== */
.cross-grid{margin-top:4px}
.cross-card{
  display:flex;align-items:center;gap:18px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--shadow-1);height:100%;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.cross-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#CBD9F8;text-decoration:none}
.cross-card .cc-icon{
  width:46px;height:46px;border-radius:12px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:var(--blue-soft);color:var(--blue-dark);font-size:18px;
}
.cross-card h3{font-size:17px;font-weight:600;color:var(--ink);margin-bottom:4px}
.cross-card p{font-size:13.5px;line-height:1.7;color:var(--muted);margin-bottom:0}
.cross-card .cc-arrow{margin-left:auto;color:var(--blue);font-size:14px;transition:transform .22s ease}
.cross-card:hover .cc-arrow{transform:translateX(4px)}

/* ===== CTA 条 ===== */
.cta-section{padding:0 0 var(--section-y)}
.cta-band{
  position:relative;overflow:hidden;
  max-width:880px;margin:0 auto;border-radius:20px;
  padding:48px 44px;color:#fff;text-align:center;
  background-image:linear-gradient(120deg,rgba(22,48,158,.90),rgba(15,29,70,.86)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  box-shadow:0 24px 50px rgba(12,26,68,.22);
}
.cta-band h2{font-size:28px;font-weight:700;color:#fff;margin-bottom:12px}
.cta-band p{font-size:15px;line-height:1.8;color:rgba(255,255,255,.84);max-width:600px;margin:0 auto 26px}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;align-items:center}
.cta-link{color:#fff;font-size:14.5px;text-decoration:underline;text-underline-offset:4px;opacity:.9}
.cta-link:hover{color:#fff;opacity:1}

/* ===== 页脚 ===== */
.site-footer{background:#F2F5FB;border-top:1px solid var(--line);padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.footer-brand .brand{margin-right:0;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--muted);max-width:280px;margin-bottom:14px}
.footer-tag{
  display:inline-block;font-size:12.5px;color:var(--blue-dark);
  background:var(--blue-soft);border-radius:var(--radius-pill);padding:5px 14px;
}
.footer-col h4{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:14px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--muted)}
.footer-col a:hover{color:var(--blue);text-decoration:none}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:38px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--faint);
}

/* ===== 响应式 ===== */
@media (max-width:1199px){
  .nav-search{width:200px}
  .main-nav{gap:20px}
}
@media (max-width:991px){
  .main-nav,.nav-search,.nav-help{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{height:64px;gap:16px}
  .page-hero h1{font-size:34px}
  .rule-grid{grid-template-columns:1fr;gap:28px}
  .rule-aside{position:static}
  .rule-aside img{height:260px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .rhythm-panel{padding:32px}
}
@media (max-width:767px){
  :root{--section-y:48px}
  .container{padding:0 20px}
  .page-hero{padding:22px 0 34px}
  .page-hero h1{font-size:28px;line-height:1.32}
  .hero-lead{font-size:15px;margin-bottom:20px}
  .section-head h2{font-size:23px}
  .section-head p{font-size:14.5px}
  .timeline::before{left:20px}
  .tl-item{grid-template-columns:44px 1fr;gap:14px}
  .tl-num{width:44px;height:44px;font-size:14px}
  .tl-card{grid-template-columns:1fr;padding:16px;gap:16px}
  .tl-figure img{height:180px;min-height:0}
  .tl-body h3{font-size:18px}
  .rhythm-panel{padding:24px;border-radius:16px}
  .rhythm-panel h2{font-size:21px}
  .status-row{grid-template-columns:96px 1fr 68px;gap:10px}
  .status-label,.status-value{font-size:13px}
  .rule-aside img{height:220px}
  .cta-band{padding:32px 22px;border-radius:16px}
  .cta-band h2{font-size:22px}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%}
  .cta-link{text-align:center}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-brand p{max-width:none}
  .cross-card{padding:18px}
  .btn{min-height:46px}
}
@media (max-width:520px){
  .page-hero h1{font-size:25px}
  .chip{height:34px;padding:0 14px;font-size:13px}
  .header-inner{gap:10px}
  .brand-top{font-size:14px}
  .footer-bottom{font-size:12px}
  .status-row{grid-template-columns:88px 1fr 58px}
}

/* roulang page: category3 */
:root{
  --brand:#2B59FF;
  --brand-dark:#16309E;
  --brand-soft:#EAF0FF;
  --teal:#00B39B;
  --teal-soft:#E3F7F3;
  --orange:#FF6A3D;
  --bg:#F5F7FC;
  --alt:#EEF2FA;
  --card:#FFFFFF;
  --ink:#0E1726;
  --ink-2:#4A5670;
  --ink-3:#8A93A6;
  --line:#E2E8F5;
  --line-strong:#CBD6EE;
  --r-card:16px;
  --r-sm:12px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(20,40,100,.06),0 8px 24px rgba(20,40,100,.06);
  --sh-2:0 16px 40px rgba(20,40,100,.10);
  --w:1200px;
  --sec-y:80px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand-dark);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand);text-decoration:underline}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;color:var(--ink);letter-spacing:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:var(--w);margin:0 auto;padding:0 24px}
.section{padding:var(--sec-y) 0}
.section-alt{background:var(--alt)}
.sec-head{max-width:720px}
.sec-head.center{margin:0 auto;text-align:center}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:5px 12px;margin-bottom:16px;
}
.badge.alt{color:var(--teal);background:var(--teal-soft)}
h2.sec-title{font-size:30px;line-height:1.35}
p.sec-desc{margin-top:12px;color:var(--ink-2);font-size:15.5px;line-height:1.8}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .22s ease}
.site-header.is-scrolled{box-shadow:0 6px 24px rgba(20,40,100,.08)}
.header-inner{display:flex;align-items:center;gap:34px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);flex:0 0 auto}
.brand:hover{text-decoration:none;color:var(--ink)}
.brand-mark{position:relative;width:26px;height:26px;border-radius:8px;background:var(--brand);flex:0 0 auto}
.brand-mark::after{content:"";position:absolute;inset:7px;border:2px solid #fff;border-radius:3px}
.brand-text{display:flex;flex-direction:column;line-height:1.12}
.brand-top{font-size:16px;font-weight:700;letter-spacing:.2px}
.brand-bottom{font-size:12px;color:var(--ink-2);letter-spacing:2.5px}
.main-nav{display:flex;align-items:center;gap:28px}
.nav-link{position:relative;font-size:15px;color:var(--ink-2);padding:6px 2px;font-weight:500}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.nav-link:hover{color:var(--brand);text-decoration:none}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:6px 14px}
.nav-link.active::after{display:none}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{display:flex;align-items:center;height:40px;width:240px;padding:0 10px;background:#F2F5FB;border:1px solid transparent;border-radius:10px;transition:background .18s ease,border-color .18s ease,box-shadow .18s ease}
.nav-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 4px rgba(43,89,255,.14)}
.nav-search i{font-size:13px;color:var(--ink-3)}
.nav-search input{flex:1;min-width:0;height:100%;border:0;background:transparent;font-size:13.5px;color:var(--ink);padding:0 8px;outline:none}
.nav-search input::placeholder{color:var(--ink-3)}
.kbd-hint{font-family:system-ui,sans-serif;font-size:11px;color:var(--ink-3);background:#fff;border:1px solid var(--line);border-radius:6px;padding:1px 5px;white-space:nowrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(43,89,255,.22)}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 26px rgba(43,89,255,.28),0 0 0 2px rgba(255,106,61,.5)}
.btn-ghost{background:#fff;color:var(--brand-dark);border-color:var(--line-strong)}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-dark);transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--brand-dark);box-shadow:0 8px 20px rgba(6,20,60,.16)}
.btn-light:hover{background:#F2F5FB;color:var(--brand-dark);transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.menu-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--ink-2);font-size:16px}
.mobile-nav{display:none;border-top:1px solid var(--line);background:#fff;padding:8px 24px 18px}
.mobile-nav.is-open{display:block}
.mobile-nav a{display:block;padding:12px 4px;font-size:15.5px;color:var(--ink-2);border-bottom:1px solid var(--line)}
.mobile-nav a:last-child{border-bottom:0}
.mobile-nav a.active{color:var(--brand);font-weight:600}

/* ---------- Page hero ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:linear-gradient(118deg,#EAF0FF 0%,#F7F9FF 52%,#EDF8F5 100%)}
.page-hero::before{content:"";position:absolute;inset:0;background-image:url(/assets/images/backpic/back-1.webp);background-size:cover;background-position:center;opacity:.14}
.page-hero::after{content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(43,89,255,.16),rgba(43,89,255,0) 68%)}
.hero-inner{position:relative;z-index:1;padding:34px 0 46px;max-width:900px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:22px}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span.sep{color:var(--line-strong)}
.breadcrumb .current{color:var(--brand-dark);font-weight:600}
.page-h1{font-size:40px;line-height:1.28;letter-spacing:0;margin-top:4px}
.page-lead{margin-top:16px;font-size:16.5px;line-height:1.85;color:var(--ink-2);max-width:740px}
.jump-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 16px;border-radius:999px;background:#fff;border:1px solid var(--line-strong);color:var(--ink-2);font-size:14px;font-weight:500;transition:.18s ease}
.chip i{font-size:12px;color:var(--brand)}
.chip:hover{border-color:var(--brand);color:var(--brand-dark);background:var(--brand-soft);text-decoration:none;transform:translateY(-1px)}
.chip.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(43,89,255,.24)}
.chip.active i{color:#fff}

/* ---------- Steps ---------- */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}
.step-card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:26px 24px 24px;box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--line-strong)}
.step-top{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;background:#fff;border:2px solid var(--brand);color:var(--brand);font-size:16px;font-weight:700;font-variant-numeric:tabular-nums;flex:0 0 auto}
.step-kicker{font-size:13px;color:var(--ink-3);letter-spacing:.4px}
.step-card h3{font-size:19px;margin-bottom:10px}
.step-card p{font-size:15px;line-height:1.8;color:var(--ink-2)}
.step-tip{margin-top:18px;padding-top:14px;border-top:1px dashed var(--line);font-size:13.5px;color:var(--ink-3);display:flex;gap:8px;align-items:flex-start}
.step-tip i{color:var(--teal);font-size:12px;margin-top:5px}
.steps-grid .step-card:not(:last-child)::after{content:"";position:absolute;top:46px;right:-16px;width:11px;height:11px;border-top:2px solid var(--line-strong);border-right:2px solid var(--line-strong);transform:rotate(45deg)}

/* ---------- Checklist ---------- */
.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-top:16px}
.check-visual{position:relative;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);border:1px solid var(--line)}
.check-visual img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.check-visual .visual-tag{position:absolute;left:16px;bottom:16px;background:#fff;border-radius:10px;padding:8px 14px;font-size:13px;font-weight:600;color:var(--brand-dark);box-shadow:0 8px 20px rgba(20,40,100,.14)}
.check-list{display:grid;gap:14px;margin-top:26px}
.check-item{display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);padding:16px 18px;box-shadow:0 1px 2px rgba(20,40,100,.04);transition:.2s ease}
.check-item:hover{border-color:var(--line-strong);box-shadow:var(--sh-1);transform:translateY(-2px)}
.check-ico{width:34px;height:34px;border-radius:10px;background:var(--teal-soft);color:var(--teal);display:inline-flex;align-items:center;justify-content:center;font-size:14px;flex:0 0 auto}
.check-item h3{font-size:16px;margin-bottom:4px}
.check-item p{font-size:14.5px;color:var(--ink-2);line-height:1.75}

/* ---------- Hint list ---------- */
.hint-list{display:grid;gap:14px;margin-top:36px}
.hint-row{display:grid;grid-template-columns:110px 1fr auto;gap:20px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px 24px;box-shadow:0 1px 2px rgba(20,40,100,.04);transition:.2s ease}
.hint-row:hover{border-color:var(--line-strong);box-shadow:var(--sh-1)}
.hint-tag{display:inline-flex;align-items:center;justify-content:center;height:30px;padding:0 12px;border-radius:999px;background:var(--brand-soft);color:var(--brand-dark);font-size:13px;font-weight:600;white-space:nowrap}
.hint-tag.warn{background:#FFF1EC;color:#C2410C}
.hint-body h3{font-size:16.5px;margin-bottom:4px}
.hint-body p{font-size:14.5px;color:var(--ink-2);line-height:1.75}
.hint-link{font-size:14px;font-weight:600;color:var(--brand-dark);display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.hint-link i{font-size:12px;transition:transform .18s ease}
.hint-link:hover i{transform:translateX(4px)}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;margin:40px auto 0;display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);box-shadow:0 1px 2px rgba(20,40,100,.04);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item.is-open{border-color:var(--brand);box-shadow:0 10px 26px rgba(20,40,100,.08)}
.faq-q{width:100%;display:flex;align-items:center;gap:16px;text-align:left;padding:18px 22px;font-size:16px;font-weight:600;color:var(--ink);background:none}
.faq-q:hover{color:var(--brand-dark)}
.faq-icon{position:relative;width:24px;height:24px;border-radius:50%;background:var(--brand-soft);flex:0 0 auto;margin-left:auto}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:7px;right:7px;top:50%;height:2px;background:var(--brand);transform:translateY(-50%);transition:transform .25s ease}
.faq-icon::after{transform:translateY(-50%) rotate(90deg)}
.faq-item.is-open .faq-icon::after{transform:translateY(-50%) rotate(0deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.is-open .faq-a{max-height:360px}
.faq-a p{padding:0 22px 20px 22px;font-size:15px;line-height:1.85;color:var(--ink-2)}

/* ---------- CTA ---------- */
.cta-band{position:relative;overflow:hidden;border-radius:20px;background:linear-gradient(120deg,#2B59FF 0%,#1E43D6 60%,#16309E 100%);color:#fff;padding:44px 48px;display:grid;grid-template-columns:1.4fr auto;gap:32px;align-items:center;box-shadow:0 20px 44px rgba(22,48,158,.28)}
.cta-band::after{content:"";position:absolute;right:-80px;bottom:-120px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.18),rgba(255,255,255,0) 70%)}
.cta-band h2{font-size:26px;color:#fff;line-height:1.4;position:relative;z-index:1}
.cta-band p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.86);line-height:1.8;position:relative;z-index:1}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;position:relative;z-index:1}
.cta-link{color:#fff;font-size:14.5px;font-weight:600;text-decoration:underline;text-underline-offset:4px}
.cta-link:hover{color:#fff;opacity:.86}

/* ---------- Footer ---------- */
.site-footer{background:#F2F5FB;border-top:1px solid var(--line);padding:56px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--ink-2);line-height:1.8;max-width:280px}
.footer-tag{display:inline-flex;margin-top:16px;font-size:12.5px;color:var(--brand-dark);background:var(--brand-soft);border-radius:999px;padding:5px 12px}
.footer-col h4{font-size:15px;margin-bottom:14px;color:var(--ink)}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--ink-2)}
.footer-col a:hover{color:var(--brand);text-decoration:none}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:40px;padding-top:20px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3)}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  :root{--sec-y:64px}
  .nav-search{width:200px}
  .main-nav{gap:20px}
}
@media (max-width:991px){
  :root{--sec-y:56px}
  .header-inner{gap:16px;min-height:64px}
  .main-nav,.nav-search{display:none}
  .menu-toggle{display:inline-flex}
  .page-h1{font-size:32px}
  .check-grid{grid-template-columns:1fr;gap:28px}
  .steps-grid{grid-template-columns:1fr;gap:16px}
  .steps-grid .step-card:not(:last-child)::after{display:none}
  .hint-row{grid-template-columns:1fr;gap:12px;align-items:flex-start}
  .hint-link{justify-self:start}
  .cta-band{grid-template-columns:1fr;padding:36px 28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:639px){
  :root{--sec-y:40px}
  .container{padding:0 20px}
  .hero-inner{padding:24px 0 36px}
  .page-h1{font-size:28px;line-height:1.32}
  .page-lead{font-size:15px}
  h2.sec-title{font-size:24px}
  .jump-chips{gap:8px}
  .chip{height:36px;font-size:13px;padding:0 14px}
  .btn{width:100%}
  .header-actions .btn-sm{width:auto;padding:0 16px}
  .cta-band h2{font-size:22px}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-link{text-align:center}
  .faq-q{font-size:15px;padding:16px 18px}
  .faq-a p{padding:0 18px 18px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --primary:#2B59FF;
  --primary-dark:#16309E;
  --primary-soft:#EAF0FF;
  --primary-line:#C9D7FF;
  --teal:#00B39B;
  --teal-soft:#E4F7F4;
  --orange:#FF6A3D;
  --bg:#F5F7FC;
  --alt:#EEF2FA;
  --ink:#0E1726;
  --muted:#4A5670;
  --dim:#8A93A6;
  --line:#E2E8F5;
  --white:#FFFFFF;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(20,40,100,.06),0 8px 24px rgba(20,40,100,.06);
  --sh-2:0 16px 40px rgba(20,40,100,.10);
  --ease:.22s cubic-bezier(.4,0,.2,1);
  --max:1200px;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure{margin:0}
h1,h2,h3,h4{font-family:inherit;font-weight:700;line-height:1.3;color:var(--ink);letter-spacing:0}
h1{font-size:44px}
h2{font-size:30px}
h3{font-size:20px;font-weight:600}
a{color:var(--primary-dark);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--primary)}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:separate}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
::selection{background:var(--primary-soft);color:var(--primary-dark)}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ============ 容器 ============ */
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--white);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(20,40,100,.08)}
.header-inner{
  max-width:var(--max);margin:0 auto;padding:0 24px;
  height:72px;display:flex;align-items:center;gap:36px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:26px;height:26px;border-radius:7px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--primary) 0%,var(--teal) 100%);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:8px;border-radius:2px;background:#fff;
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-top{font-size:15px;font-weight:700;color:var(--ink);letter-spacing:.02em}
.brand-bottom{font-size:11px;color:var(--dim);letter-spacing:.18em;margin-top:2px}

.main-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:38px;
  padding:0 14px;font-size:15px;color:var(--muted);border-radius:999px;
  transition:color var(--ease),background var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:5px;width:0;height:2px;
  background:var(--primary);border-radius:2px;transform:translateX(-50%);
  transition:width var(--ease);
}
.nav-link:hover{color:var(--primary);background:var(--primary-soft)}
.nav-link:hover::after{width:16px}
.nav-link.active{color:var(--primary);font-weight:600;background:var(--primary-soft)}
.nav-link.active::after{display:none}

.header-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.nav-search{position:relative;width:236px}
.nav-search input{
  width:100%;height:40px;border-radius:var(--r-sm);
  background:var(--alt);border:1px solid transparent;
  padding:0 62px 0 38px;font-size:14px;color:var(--ink);
  transition:background var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.nav-search input::placeholder{color:var(--dim)}
.nav-search input:focus{
  outline:none;background:#fff;border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(43,89,255,.12);
}
.nav-search .search-icon{
  position:absolute;left:13px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;color:var(--dim);pointer-events:none;
}
.nav-search kbd{
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  font-family:inherit;font-size:11px;color:var(--dim);
  background:#fff;border:1px solid var(--line);border-radius:6px;
  padding:1px 7px;line-height:1.6;pointer-events:none;
}
.help-link{font-size:14px;color:var(--muted);white-space:nowrap}
.help-link:hover{color:var(--primary)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(43,89,255,.22)}
.btn-primary:hover{background:#1f47e0;color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(43,89,255,.30)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 10px rgba(43,89,255,.22)}
.btn-outline{background:#fff;color:var(--primary-dark);border-color:var(--primary-line)}
.btn-outline:hover{background:var(--primary-soft);color:var(--primary);border-color:var(--primary)}
.btn-light{background:#fff;color:var(--primary-dark)}
.btn-light:hover{background:#f2f6ff;color:var(--primary);transform:translateY(-1px);box-shadow:0 10px 24px rgba(10,25,70,.20)}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost-light:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff}
.btn-sm{height:40px;padding:0 18px;font-size:14px}

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

.mobile-panel{display:none;background:#fff;border-top:1px solid var(--line);padding:10px 0 18px}
.mobile-panel.is-open{display:block}
.mobile-panel .m-nav{display:flex;flex-direction:column}
.mobile-panel .m-nav a{
  display:flex;align-items:center;height:48px;padding:0 4px;
  font-size:15px;color:var(--muted);border-bottom:1px solid var(--line);
}
.mobile-panel .m-nav a.active{color:var(--primary);font-weight:600}
.mobile-panel .m-extra{display:flex;flex-direction:column;gap:12px;margin-top:16px}
.mobile-panel .m-extra .btn{width:100%}

/* ============ 分类页 Hero ============ */
.cat-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(118deg,#EDF2FF 0%,#F6F9FF 52%,#E9F8F5 100%);
  border-bottom:1px solid var(--line);
  padding:38px 0 40px;
}
.cat-hero::after{
  content:"";position:absolute;top:-120px;right:-100px;width:520px;height:520px;
  background:radial-gradient(circle at center,rgba(43,89,255,.14),rgba(43,89,255,0) 68%);
  pointer-events:none;
}
.cat-hero .container{position:relative;z-index:1}

.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--dim);margin-bottom:20px}
.breadcrumb a{color:var(--dim)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:#c3ccdd}
.breadcrumb [aria-current]{color:var(--primary-dark);font-weight:600}

.eyebrow{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary-dark);
  font-size:12px;font-weight:600;letter-spacing:.02em;
  margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary)}

.cat-hero h1{font-size:40px;line-height:1.25;max-width:820px}
.cat-hero-lead{
  margin-top:16px;max-width:760px;font-size:16px;line-height:1.85;color:var(--muted);
}
.cat-hero-meta{
  margin-top:20px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 0;
  font-size:13px;color:var(--muted);
}
.cat-hero-meta span{padding:0 14px;position:relative}
.cat-hero-meta span:first-child{padding-left:0}
.cat-hero-meta span+span::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:12px;background:var(--line);
}

.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 18px;
  border-radius:999px;font-size:14px;font-weight:500;
  background:#fff;color:var(--muted);border:1px solid var(--line);
  transition:all var(--ease);
}
.chip:hover{color:var(--primary);border-color:var(--primary-line);background:var(--primary-soft)}
.chip.is-active{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 6px 16px rgba(43,89,255,.22)}
.chip.is-active:hover{background:#1f47e0;color:#fff}

/* ============ 通用板块 ============ */
.section{padding:80px 0}
.section--alt{background:var(--alt)}
.section--tight{padding:64px 0}

.section-head{margin-bottom:36px}
.section-head h2{margin-top:0}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;color:var(--primary-dark);
  background:var(--primary-soft);border-radius:999px;
  height:26px;padding:0 12px;margin-bottom:14px;
}
.section-desc{margin-top:12px;font-size:15px;line-height:1.8;color:var(--muted);max-width:720px}

/* ============ 等级进度 ============ */
.level-board{
  background:#fff;border-radius:var(--r-lg);box-shadow:var(--sh-1);
  padding:32px;border:1px solid var(--line);
}
.level-board-top{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;
  margin-bottom:26px;
}
.level-current{display:flex;align-items:baseline;gap:10px}
.level-current strong{font-size:36px;font-weight:700;color:var(--primary-dark);font-variant-numeric:tabular-nums;line-height:1}
.level-current span{font-size:13px;color:var(--dim)}
.level-note{font-size:13px;color:var(--dim)}

.level-track{position:relative;padding-top:8px}
.level-rail{
  position:relative;height:10px;border-radius:999px;background:#EDF1FA;overflow:hidden;
}
.level-fill{
  position:absolute;left:0;top:0;bottom:0;width:62%;border-radius:999px;
  background:linear-gradient(90deg,var(--primary) 0%,var(--teal) 100%);
}
.level-nodes{
  display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:-23px;position:relative;
}
.level-node{display:flex;flex-direction:column;align-items:flex-start}
.level-node:nth-child(2),.level-node:nth-child(3){align-items:center}
.level-node:nth-child(4){align-items:flex-end}
.level-dot{
  width:16px;height:16px;border-radius:50%;background:#fff;
  border:3px solid var(--primary-line);margin-bottom:12px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.level-dot.is-done{border-color:var(--teal);box-shadow:0 0 0 4px rgba(0,178,155,.14)}
.level-dot.is-now{border-color:var(--primary);box-shadow:0 0 0 4px rgba(43,89,255,.14)}
.level-node h3{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:4px}
.level-node p{font-size:13px;color:var(--dim);line-height:1.7}

/* ============ 图文说明 ============ */
.explain-split{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.explain-copy h2{margin-bottom:16px}
.explain-copy p{font-size:16px;color:var(--muted);line-height:1.85}
.explain-list{margin-top:24px;display:flex;flex-direction:column;gap:14px}
.explain-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--muted)}
.explain-list .dot{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;
  background:var(--teal-soft);color:var(--teal);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;margin-top:3px;
}
.explain-list strong{color:var(--ink);font-weight:600}
.explain-media{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2)}
.explain-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.explain-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,23,38,0) 45%,rgba(14,23,38,.55) 100%);
}
.explain-media figcaption{
  position:absolute;left:20px;right:20px;bottom:16px;z-index:1;
  color:#fff;font-size:13px;line-height:1.6;
}

/* ============ 对比表 ============ */
.table-wrap{overflow-x:auto;padding-bottom:6px}
.table-hint{display:none;font-size:12px;color:var(--dim);margin-top:10px}
.compare-table{
  width:100%;min-width:720px;border-spacing:0 10px;border-collapse:separate;
  font-size:15px;
}
.compare-table th[scope="col"]{
  background:var(--primary-soft);color:var(--primary-dark);
  font-size:13px;font-weight:600;text-align:left;
  padding:14px 20px;letter-spacing:.02em;
}
.compare-table thead th[scope="col"]:first-child{border-radius:var(--r-md) 0 0 var(--r-md)}
.compare-table thead th[scope="col"]:last-child{border-radius:0 var(--r-md) var(--r-md) 0}
.compare-table tbody tr{
  background:#fff;box-shadow:var(--sh-1);
  transition:background var(--ease),box-shadow var(--ease),transform var(--ease);
}
.compare-table tbody tr:hover{background:#F5F8FF;box-shadow:var(--sh-2);transform:translateY(-2px)}
.compare-table tbody th,.compare-table tbody td{
  padding:18px 20px;text-align:left;vertical-align:top;
  border:0;color:var(--muted);line-height:1.7;
}
.compare-table tbody th{
  color:var(--ink);font-weight:600;font-size:15px;
  border-radius:var(--r-md) 0 0 var(--r-md);width:22%;
}
.compare-table tbody td:last-child{
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--primary-dark);font-weight:500;
}
.cell-tag{
  display:inline-block;font-size:11px;font-weight:600;color:var(--primary-dark);
  background:var(--primary-soft);border-radius:6px;padding:1px 7px;
  margin-right:8px;vertical-align:2px;
}

/* ============ 奖励卡组（交错） ============ */
.reward-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.reward-col{display:flex;flex-direction:column;gap:24px}
.reward-col--offset{margin-top:44px}
.reward-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.reward-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--primary-line)}
.reward-card-top{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.reward-icon{
  width:38px;height:38px;border-radius:var(--r-sm);flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary-dark);
  font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;
}
.reward-badge{
  font-size:12px;font-weight:600;color:var(--teal);
  background:var(--teal-soft);border-radius:999px;
  padding:3px 10px;line-height:1.5;
}
.reward-card h3{font-size:19px;margin-bottom:10px}
.reward-card p{font-size:15px;color:var(--muted);line-height:1.8}
.reward-divider{height:1px;background:var(--line);margin:18px 0 14px}
.reward-key{font-size:13px;color:var(--dim);display:flex;align-items:center;gap:8px}
.reward-key::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal);flex:0 0 auto}

/* ============ 流程步骤 ============ */
.flow-steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  counter-reset:flow;
}
.flow-step{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-lg);padding:26px 22px;box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.flow-step:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--primary-line)}
.flow-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:50%;
  border:2px solid var(--primary);color:var(--primary);
  font-size:13px;font-weight:700;background:#fff;
  font-variant-numeric:tabular-nums;margin-bottom:16px;
}
.flow-step h3{font-size:17px;margin-bottom:8px}
.flow-step p{font-size:14px;color:var(--muted);line-height:1.75}
.flow-step::after{
  content:"→";position:absolute;right:-16px;top:50%;transform:translateY(-50%);
  color:var(--primary-line);font-size:18px;line-height:1;
}
.flow-step:last-child::after{display:none}

/* ============ FAQ ============ */
.faq-list{max-width:900px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;box-shadow:var(--sh-1);overflow:hidden;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item:hover{border-color:var(--primary-line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;
}
.faq-q:hover{color:var(--primary)}
.faq-icon{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;
  background:var(--primary-soft);position:relative;
  transition:background var(--ease),transform var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--primary);
  border-radius:2px;transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:2px}
.faq-icon::after{width:2px;height:10px;transition:opacity var(--ease),transform var(--ease)}
.faq-item.is-open .faq-icon{background:var(--primary);transform:rotate(180deg)}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:#fff}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows .28s cubic-bezier(.4,0,.2,1);
}
.faq-item.is-open .faq-a{grid-template-rows:1fr}
.faq-a > div{overflow:hidden}
.faq-a p{
  padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--muted);
}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:20px;
  background-image:linear-gradient(rgba(22,48,158,.86),rgba(22,48,158,.86)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  padding:52px 48px;color:#fff;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band h2{color:#fff;font-size:28px;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.86);font-size:15px;line-height:1.8;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px}
.cta-link{
  color:#fff;font-size:14px;text-decoration:underline;
  text-underline-offset:4px;text-decoration-thickness:1px;
}
.cta-link:hover{color:#fff;text-decoration-thickness:2px}

/* ============ 页脚 ============ */
.site-footer{background:#F2F5FB;border-top:1px solid var(--line);padding:64px 0 28px;margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:40px;
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--muted);line-height:1.8;max-width:280px}
.footer-tag{
  display:inline-block;margin-top:16px;font-size:12px;color:var(--primary-dark);
  background:var(--primary-soft);border-radius:999px;padding:4px 12px;
}
.footer-col h4{
  font-size:14px;font-weight:600;color:var(--ink);margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:var(--muted)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  border-top:1px solid var(--line);padding-top:22px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--dim);
}

/* ============ 响应式 ============ */
@media (max-width:1100px){
  .header-inner{gap:24px}
  .nav-search{width:200px}
  .help-link{display:none}
  .cat-hero h1{font-size:36px}
}

@media (max-width:980px){
  .main-nav{display:none}
  .nav-search{display:none}
  .menu-toggle{display:flex}
  .header-inner{justify-content:space-between}
  .cat-hero{padding:32px 0 34px}
  .cat-hero h1{font-size:32px}
  .explain-split{grid-template-columns:1fr;gap:28px}
  .flow-steps{grid-template-columns:repeat(2,1fr)}
  .flow-step:nth-child(2)::after{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}

@media (max-width:768px){
  .section{padding:56px 0}
  .section--tight{padding:48px 0}
  h1{font-size:30px}
  h2{font-size:24px}
  .cat-hero h1{font-size:28px}
  .cat-hero-lead{font-size:15px}
  .level-board{padding:24px 20px}
  .level-nodes{grid-template-columns:repeat(2,1fr);gap:20px 12px;margin-top:16px}
  .level-node,.level-node:nth-child(2),.level-node:nth-child(3),.level-node:nth-child(4){align-items:flex-start}
  .reward-grid{grid-template-columns:1fr}
  .reward-col--offset{margin-top:0}
  .cta-band{padding:36px 24px}
  .cta-band h2{font-size:23px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .cta-link{width:100%;text-align:center}
}

@media (max-width:640px){
  .container{padding:0 20px}
  .header-inner{height:60px;padding:0 20px}
  .site-header .btn-sm{height:38px;padding:0 14px;font-size:13px}
  .cat-hero{padding:26px 0 28px}
  .cat-hero h1{font-size:25px;line-height:1.35}
  .breadcrumb{font-size:12px;margin-bottom:16px}
  .chips{gap:8px;margin-top:20px}
  .chip{height:32px;padding:0 14px;font-size:13px}
  .flow-steps{grid-template-columns:1fr}
  .flow-step::after{display:none}
  .table-hint{display:block}
  .faq-q{font-size:15px;padding:16px 18px}
  .faq-a p{padding:0 18px 18px;font-size:14px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:28px}
  .footer-bottom{flex-direction:column;font-size:12px}
  .level-current strong{font-size:30px}
  .compare-table{min-width:640px}
}

@media (max-width:420px){
  .cat-hero h1{font-size:22px}
  .section{padding:44px 0}
  .reward-card{padding:20px}
  .level-board{padding:20px 16px}
}