/* roulang page: index */
/* ========== 设计变量 ========== */
:root{
  --brand:#2A5BD7;
  --brand-dark:#1B3F9E;
  --brand-soft:#E8EFFE;
  --brand-line:#C9D9FB;
  --accent:#FF7A45;
  --accent-soft:#FFF1E9;
  --teal:#12B5A5;
  --teal-soft:#E4F7F4;
  --teal-ink:#0B8C80;
  --bg:#F5F8FC;
  --surface:#FFFFFF;
  --ink:#121A2B;
  --ink-2:#4A5568;
  --ink-3:#8A94A6;
  --line:#E3E9F2;
  --hairline:rgba(18,26,43,.08);
  --radius-card:14px;
  --radius-img:12px;
  --radius-input:10px;
  --shadow-sm:0 1px 2px rgba(18,26,43,.04),0 6px 18px rgba(42,91,215,.06);
  --shadow-md:0 8px 28px rgba(42,91,215,.14);
  --ease:cubic-bezier(.2,.6,.3,1);
  --nav-w:224px;
}

/* ========== 基础 reset / base ========== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",Inter,ui-sans-serif,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease)}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,.accordion-title:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:8px;
}
::selection{background:var(--brand);color:#fff}

/* ========== 覆盖 Foundation 默认味道 ========== */
.button,.button.primary,.button.secondary{
  background:var(--brand);color:#fff;border-radius:999px;
  font-size:15px;font-weight:600;padding:0 24px;height:46px;line-height:46px;border:1px solid transparent;
}
.button:hover,.button:focus{background:var(--brand-dark);color:#fff}
input[type="text"],input[type="email"],input[type="search"],textarea{
  border:1px solid var(--line);border-radius:var(--radius-input);box-shadow:none;
  background:#fff;height:46px;padding:0 14px;font-size:15px;transition:border-color .18s,box-shadow .18s;
}
input[type="text"]:focus,input[type="email"]:focus,input[type="search"]:focus,textarea:focus{
  border-color:var(--brand);box-shadow:0 0 0 4px rgba(42,91,215,.12);outline:none;
}
.accordion{border:0;background:transparent}
.accordion-item{border:0}
.accordion-content{border:0}

/* ========== 布局骨架 ========== */
.app{min-height:100vh}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}

/* ========== 左侧竖向导航 ========== */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:20px 14px 18px;overflow-y:auto;z-index:60;
  transition:width .2s var(--ease),transform .25s var(--ease);
}
.brand{
  display:flex;align-items:center;gap:10px;
  padding:4px 6px 18px;margin-bottom:14px;border-bottom:1px solid var(--line);
}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  background:linear-gradient(140deg,var(--brand),var(--brand-dark));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:800;letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:15px;font-weight:700;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--ink-3);letter-spacing:.2em}
.nav{display:flex;flex-direction:column;gap:4px;flex:1 1 auto}
.nav-item{
  position:relative;display:flex;align-items:center;gap:11px;
  height:44px;padding:0 12px;border-radius:10px;
  color:var(--ink-2);font-size:14px;font-weight:500;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-item:hover{background:var(--brand-soft);color:var(--brand-dark)}
.nav-item.is-active{background:var(--brand-soft);color:var(--brand-dark);font-weight:700}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.nav-ico{width:20px;height:20px;flex:0 0 20px;display:flex;align-items:center;justify-content:center}
.nav-ico svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.nav-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-cta{
  margin-top:16px;display:flex;align-items:center;justify-content:center;gap:8px;
  height:46px;border-radius:999px;background:var(--brand);color:#fff;
  font-size:14px;font-weight:600;box-shadow:0 6px 18px rgba(42,91,215,.22);
  transition:background .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.nav-cta:hover{background:#3566de;box-shadow:0 10px 24px rgba(42,91,215,.3);transform:translateY(-1px)}
.nav-cta:active{transform:translateY(1px)}
.nav-cta .nav-ico svg{stroke-width:1.8}

/* ========== 内容区 ========== */
.content{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column}
.topbar{display:none}
.nav-scrim{display:none}

/* ========== 按钮 / 标签 ========== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;
  font-size:15px;font-weight:600;border:1px solid transparent;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(42,91,215,.22)}
.btn-primary:hover{background:#3566de;box-shadow:0 10px 26px rgba(42,91,215,.3);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(255,122,69,.26)}
.btn-accent:hover{background:#ff8c5e;box-shadow:0 10px 26px rgba(255,122,69,.32);transform:translateY(-1px)}
.btn-accent:active{transform:translateY(1px)}
.btn-outline{background:#fff;color:var(--brand-dark);border-color:var(--brand-line)}
.btn-outline:hover{border-color:var(--brand);background:var(--brand-soft)}
.btn-ghost{background:#fff;color:var(--ink-2);border-color:var(--line)}
.btn-ghost:hover{color:var(--brand-dark);border-color:var(--brand-line);background:var(--brand-soft)}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;
}
.pill .dot{width:6px;height:6px;border-radius:50%;background:var(--brand)}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  background:var(--brand-soft);color:var(--brand-dark);
  border-radius:999px;padding:7px 15px;font-size:12.5px;font-weight:600;
}
.chip svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.chip.is-accent{background:var(--accent-soft);color:#C9501C}

/* ========== 板块 ========== */
.section{padding:88px 0}
.section-tint{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:740px;margin-bottom:44px}
.section-head h2{font-size:clamp(22px,2.4vw,32px);font-weight:700;letter-spacing:-.01em;line-height:1.35}
.section-head p{margin-top:12px;color:var(--ink-2);font-size:15px}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.16em;
  color:var(--brand);text-transform:uppercase;margin-bottom:12px;
}

/* ========== KV 首屏 ========== */
.hero{position:relative;overflow:hidden;background:#fff;border-bottom:1px solid var(--line)}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(620px 340px at 10% 6%,rgba(42,91,215,.075),transparent 70%),
    radial-gradient(460px 280px at 94% 34%,rgba(18,181,165,.06),transparent 72%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(18,26,43,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(18,26,43,.035) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 72%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 72%);
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;
  padding:76px 0 68px;
}
.hero-copy h1{
  font-size:clamp(28px,3.4vw,44px);line-height:1.28;font-weight:700;
  letter-spacing:-.012em;margin-top:18px;
}
.hero-copy .lede{margin-top:18px;font-size:16px;color:var(--ink-2);max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:20px;box-shadow:0 18px 44px rgba(42,91,215,.18);
}
.float-card{
  position:absolute;left:-26px;bottom:-24px;
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:14px 18px;box-shadow:var(--shadow-md);
  display:flex;align-items:center;gap:14px;
}
.float-card .fc-num{
  font-size:24px;font-weight:800;color:var(--brand-dark);
  font-variant-numeric:tabular-nums;line-height:1.1;
}
.float-card .fc-label{font-size:12.5px;color:var(--ink-3);line-height:1.4}

/* ========== 关键数据条 ========== */
.stats-band{padding:48px 0 8px}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:#fff;border:1px solid var(--line);border-radius:16px;
  box-shadow:var(--shadow-sm);overflow:hidden;
}
.stat{padding:26px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat .num{
  display:block;font-size:34px;font-weight:800;line-height:1.15;
  color:var(--brand-dark);font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.stat .num small{font-size:15px;font-weight:700;margin-left:3px}
.stat .lbl{display:block;margin-top:6px;font-size:13px;color:var(--ink-3)}

/* ========== 玩法步骤 ========== */
.step-card{
  position:relative;height:100%;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);padding:26px 22px 24px;box-shadow:var(--shadow-sm);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
  display:flex;flex-direction:column;
}
.step-card:hover{transform:translateY(-2px);border-color:rgba(42,91,215,.35);box-shadow:var(--shadow-md)}
.step-no{font-size:12.5px;font-weight:800;color:var(--brand);letter-spacing:.1em;font-variant-numeric:tabular-nums}
.step-ico{
  width:44px;height:44px;border-radius:12px;background:var(--brand-soft);color:var(--brand-dark);
  display:flex;align-items:center;justify-content:center;margin:14px 0 16px;
}
.step-ico svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.step-card h3{font-size:18px;font-weight:700;letter-spacing:-.005em}
.step-card p{margin-top:8px;font-size:14px;color:var(--ink-2);line-height:1.75}
.text-link{
  display:inline-flex;align-items:center;gap:5px;margin-top:auto;padding-top:14px;
  font-size:14px;font-weight:600;color:var(--brand);
}
.text-link:hover{color:var(--brand-dark);text-decoration:underline}
.text-link svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}

/* ========== 奖励预览 ========== */
.reward-card{
  height:100%;display:flex;flex-direction:column;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.reward-card:hover{transform:translateY(-2px);border-color:rgba(42,91,215,.35);box-shadow:var(--shadow-md)}
.reward-media{position:relative;background:#EEF2F9;overflow:hidden}
.reward-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .24s var(--ease)}
.reward-card:hover .reward-media img{transform:scale(1.02)}
.tier-badge{
  position:absolute;top:12px;left:12px;background:var(--brand);color:#fff;
  font-size:12px;font-weight:700;padding:4px 11px;border-radius:8px;letter-spacing:.02em;
}
.tier-badge.is-accent{background:var(--accent)}
.reward-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1 1 auto}
.reward-body h3{font-size:17px;font-weight:700}
.reward-body p{font-size:13.5px;color:var(--ink-2);line-height:1.7}
.unlock{margin-top:auto;padding-top:12px;border-top:1px dashed var(--line);font-size:12.5px;color:var(--ink-3)}

/* ========== 任务进度 ========== */
.progress-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:start}
.progress-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-sm);
}
.progress-panel h3{font-size:18px;font-weight:700}
.progress-row{display:flex;align-items:center;gap:16px;margin:24px 0 16px}
.progress-track{flex:1 1 auto;height:8px;border-radius:999px;background:#E9EEF7;overflow:hidden}
.progress-track span{
  display:block;height:100%;border-radius:999px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
}
.progress-num{font-size:20px;font-weight:800;color:var(--brand-dark);font-variant-numeric:tabular-nums}
.muted{font-size:13px;color:var(--ink-3)}
.task-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-sm)}
.task-list li{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;border-bottom:1px solid var(--line);font-size:14.5px;color:var(--ink);
}
.task-list li:last-child{border-bottom:0}
.task-name{display:flex;align-items:center;gap:10px;min-width:0}
.task-name svg{width:18px;height:18px;flex:0 0 18px;fill:none;stroke:var(--ink-3);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.badge{font-size:12.5px;font-weight:700;padding:4px 12px;border-radius:999px;white-space:nowrap}
.badge-done{background:var(--teal-soft);color:var(--teal-ink)}
.badge-doing{background:var(--brand-soft);color:var(--brand-dark)}
.badge-todo{background:#F0F3F8;color:var(--ink-3)}

/* ========== CTA 带 ========== */
.cta-band{
  position:relative;overflow:hidden;padding:64px 0;
  background-color:var(--brand-soft);
  background-image:linear-gradient(rgba(232,239,254,.94),rgba(232,239,254,.94)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border-top:1px solid #D9E5FF;border-bottom:1px solid #D9E5FF;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(560px 300px at 86% 18%,rgba(42,91,215,.14),transparent 72%);
}
.cta-inner{
  position:relative;z-index:2;display:flex;align-items:center;
  justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;letter-spacing:-.01em}
.cta-inner p{margin-top:10px;font-size:15px;color:var(--ink-2);max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ========== 最新信息 ========== */
.post-card{
  display:flex;flex-direction:column;height:100%;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-sm);color:var(--ink);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.post-card:hover{transform:translateY(-2px);border-color:rgba(42,91,215,.35);box-shadow:var(--shadow-md);color:var(--ink)}
.post-cover{background:#EEF2F9;overflow:hidden}
.post-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .24s var(--ease)}
.post-card:hover .post-cover img{transform:scale(1.02)}
.post-body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.post-badge{
  align-self:flex-start;background:var(--brand-soft);color:var(--brand-dark);
  font-size:12px;font-weight:700;padding:4px 10px;border-radius:8px;
}
.post-body h3{
  font-size:16.5px;font-weight:700;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-body p{
  font-size:13.5px;color:var(--ink-2);line-height:1.72;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding-top:12px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--ink-3);
}
.post-meta .arrow{color:var(--brand);font-weight:700;transition:transform .18s var(--ease)}
.post-card:hover .post-meta .arrow{transform:translateX(3px)}
.empty-state{
  border:1px dashed #C6D4EC;border-radius:var(--radius-card);background:#fff;
  padding:56px 24px;text-align:center;color:var(--ink-3);
}
.empty-state svg{width:34px;height:34px;margin:0 auto 14px;fill:none;stroke:#B7C4DA;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.empty-state p{font-size:14.5px}

/* ========== FAQ ========== */
.faq-wrap{max-width:860px}
.faq-wrap .accordion{border-top:1px solid var(--line)}
.accordion-item{border-bottom:1px solid var(--line)!important;background:transparent}
.accordion-title{
  display:flex!important;align-items:center;justify-content:space-between;gap:20px;
  width:100%;padding:22px 0!important;border:0!important;background:transparent!important;
  font-size:16.5px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .18s var(--ease);
}
.accordion-title:hover{color:var(--brand-dark)}
.accordion-title::before{
  content:"+"!important;position:static!important;
  order:2;width:26px;height:26px;flex:0 0 26px;margin:0!important;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;background:var(--brand-soft);color:var(--brand);
  font-size:16px;font-weight:700;line-height:1;top:auto;right:auto;transform:none;
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.accordion-item.is-active .accordion-title{color:var(--brand-dark)}
.accordion-item.is-active .accordion-title::before{
  content:"+"!important;transform:rotate(45deg);background:var(--brand);color:#fff;
}
.accordion-content{
  padding:0 0 24px!important;border:0!important;background:transparent!important;
  color:var(--ink-2);font-size:15px;line-height:1.85;max-width:720px;
}

/* ========== 订阅表单 ========== */
.subscribe{
  margin-top:44px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-sm);
  display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;
}
.subscribe h3{font-size:17px;font-weight:700}
.subscribe .hint{margin-top:6px;font-size:13.5px;color:var(--ink-3)}
.subscribe-form{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:13px;color:var(--ink-2);font-weight:600}
.field input{width:260px}
.form-note{width:100%;font-size:12.5px;color:var(--ink-3)}

/* ========== 页脚 ========== */
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:auto}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
  padding:64px 0 44px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:16px;border-radius:10px}
.footer-brand strong{font-size:15.5px;font-weight:700}
.footer-grid h4{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--ink)}
.footer-grid p{font-size:13.5px;color:var(--ink-2);line-height:1.85;max-width:320px}
.footer-grid ul li{margin-bottom:10px}
.footer-grid ul a{font-size:13.5px;color:var(--ink-2)}
.footer-grid ul a:hover{color:var(--brand);text-decoration:underline}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-3);
}
.footer-bottom .links{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom .links a{color:var(--ink-3)}
.footer-bottom .links a:hover{color:var(--brand)}

/* ========== 响应式 ========== */
@media (max-width:1199px){
  :root{--nav-w:76px}
  .sidebar{padding:18px 10px;align-items:center}
  .sidebar .nav-label,.sidebar .brand-text{display:none}
  .brand{justify-content:center;padding:4px 0 16px;width:100%}
  .nav{width:100%;align-items:center}
  .nav-item{justify-content:center;padding:0;width:52px}
  .nav-item.is-active::before{top:8px;bottom:8px}
  .nav-cta{width:52px;padding:0;border-radius:14px}
}
@media (max-width:991px){
  .sidebar{
    width:282px;padding:20px 16px;align-items:stretch;
    transform:translateX(-100%);z-index:100;box-shadow:0 0 40px rgba(18,26,43,.18);
  }
  .sidebar .nav-label,.sidebar .brand-text{display:block}
  .brand{justify-content:flex-start;padding:4px 6px 18px}
  .nav{align-items:stretch}
  .nav-item{justify-content:flex-start;padding:0 12px;width:auto}
  .nav-cta{width:auto;border-radius:999px;padding:0}
  body.nav-open .sidebar{transform:translateX(0)}
  .content{margin-left:0;padding-top:60px}
  .topbar{
    display:flex;align-items:center;justify-content:space-between;
    position:fixed;top:0;left:0;right:0;height:60px;padding:0 16px;
    background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);z-index:80;
  }
  .topbar-brand{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:700;color:var(--ink)}
  .topbar-brand .brand-mark{width:32px;height:32px;flex:0 0 32px;font-size:15px;border-radius:9px}
  .menu-toggle{
    width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  }
  .menu-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .2s var(--ease),opacity .2s var(--ease)}
  body.nav-open .menu-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  body.nav-open .menu-toggle span:nth-child(2){opacity:0}
  body.nav-open .menu-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  .nav-scrim{
    display:block;position:fixed;inset:0;z-index:90;background:rgba(18,26,43,.45);
    opacity:0;visibility:hidden;transition:opacity .22s var(--ease),visibility .22s var(--ease);
  }
  body.nav-open .nav-scrim{opacity:1;visibility:visible}
  body.nav-open{overflow:hidden}
  .hero-grid{grid-template-columns:1fr;gap:40px;padding:56px 0 56px}
  .float-card{left:16px;bottom:16px}
  .section{padding:64px 0}
  .stats-band{padding:40px 0 0}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat{border-bottom:1px solid var(--line)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(3),.stat:nth-child(4){border-bottom:0}
  .progress-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .subscribe{grid-template-columns:1fr}
}
@media (max-width:575px){
  .container{padding:0 16px}
  .hero-copy h1{margin-top:14px}
  .hero-actions{gap:10px}
  .hero-actions .btn{width:100%}
  .float-card{padding:12px 14px;gap:10px}
  .float-card .fc-num{font-size:20px}
  .section{padding:52px 0}
  .section-head{margin-bottom:32px}
  .stats-grid{grid-template-columns:1fr}
  .stat{border-right:0!important;border-bottom:1px solid var(--line)!important;padding:20px}
  .stat:last-child{border-bottom:0!important}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:48px 0 32px}
  .accordion-title{font-size:15.5px;padding:18px 0!important}
  .field input{width:100%}
  .subscribe-form{width:100%}
  .subscribe-form .btn{width:100%}
  .cta-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --primary:#2A5BD7;
  --primary-dark:#1B3F9E;
  --primary-soft:#E8EFFE;
  --accent:#FF7A45;
  --accent-soft:#FFF1E9;
  --teal:#12B5A5;
  --bg:#F5F8FC;
  --surface:#FFFFFF;
  --text:#121A2B;
  --text-2:#4A5568;
  --text-3:#8A94A6;
  --border:#E3E9F2;
  --hair:rgba(18,26,43,.08);
  --radius:14px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(18,26,43,.04),0 6px 18px rgba(42,91,215,.06);
  --shadow-2:0 8px 28px rgba(42,91,215,.14);
  --ease:cubic-bezier(.2,.6,.3,1);
  --side-w:224px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;padding:0;background:var(--bg);color:var(--text-2);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Inter,ui-sans-serif,system-ui,sans-serif;
  font-size:16px;line-height:1.8;font-weight:400;letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{margin:0;color:var(--text);font-weight:700;line-height:1.35;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--primary);}
img{max-width:100%;display:block;border:0;}
button,input,select,textarea{font:inherit;color:inherit;}
button{border:0;background:none;cursor:pointer;}
svg{display:block;}
table{border-collapse:collapse;}
::selection{background:var(--primary-soft);color:var(--primary-dark);}
a:focus-visible,button:focus-visible,input:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--primary);outline-offset:2px;border-radius:8px;
}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.app{min-height:100vh;display:flex;flex-direction:column;}
.shell{margin-left:var(--side-w);min-height:100vh;display:flex;flex-direction:column;background:var(--bg);}
main{flex:1 1 auto;}
.section{padding:72px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;}
.section-head h2{font-size:clamp(22px,2.4vw,32px);}
.section-head .sub{margin-top:8px;font-size:14px;color:var(--text-3);}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary);white-space:nowrap;}
.link-more svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s var(--ease);}
.link-more:hover{color:var(--primary-dark);}
.link-more:hover svg{transform:translateX(3px);}

/* ============ Sidebar ============ */
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--side-w);
  background:var(--surface);border-right:1px solid var(--border);
  display:flex;flex-direction:column;padding:20px 14px 18px;z-index:60;
}
.side-brand{display:flex;align-items:center;gap:10px;padding:6px 8px 16px;border-bottom:1px solid var(--hair);margin-bottom:14px;}
.brand-mark{
  width:34px;height:34px;flex:0 0 auto;border-radius:10px;
  background:linear-gradient(150deg,#3A6BE6,#1B3F9E);color:#fff;
  display:grid;place-items:center;font-size:16px;font-weight:700;
  box-shadow:0 4px 12px rgba(42,91,215,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;min-width:0;}
.brand-text strong{font-size:14px;color:var(--text);font-weight:700;}
.brand-text em{font-style:normal;font-size:11px;color:var(--text-3);letter-spacing:.18em;}
.nav{display:flex;flex-direction:column;gap:2px;flex:1 1 auto;overflow-y:auto;overflow-x:hidden;}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;height:44px;padding:0 12px;
  border-radius:var(--radius-sm);color:var(--text-2);font-size:14px;font-weight:500;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-item:hover{background:var(--primary-soft);color:var(--primary-dark);}
.nav-item.is-active{background:var(--primary-soft);color:var(--primary-dark);font-weight:700;}
.nav-item.is-active::before{
  content:"";position:absolute;left:-14px;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--primary);
}
.nav-ico{width:20px;height:20px;flex:0 0 auto;display:grid;place-items:center;color:currentColor;}
.nav-ico svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.nav-label{white-space:nowrap;}
.side-cta{
  margin-top:14px;display:flex;align-items:center;justify-content:center;height:44px;
  border-radius:var(--radius-pill);background:var(--primary);color:#fff;font-size:14px;font-weight:700;
  box-shadow:0 6px 18px rgba(42,91,215,.26);
  transition:background .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.side-cta:hover{background:#3468E6;color:#fff;box-shadow:0 8px 24px rgba(42,91,215,.34);}
.side-cta:active{transform:translateY(1px);}

/* ============ Mobile bar & drawer ============ */
.mobile-bar{display:none;}
.drawer{display:none;}
.drawer-mask{display:none;}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.btn svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 18px rgba(42,91,215,.24);}
.btn-primary:hover{background:#3468E6;color:#fff;box-shadow:0 10px 26px rgba(42,91,215,.32);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);}
.btn-ghost:hover{color:var(--primary-dark);border-color:rgba(42,91,215,.42);background:var(--primary-soft);}
.btn-ghost:active{transform:translateY(1px);}

/* ============ Breadcrumb ============ */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);line-height:1.6;}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li+li::before{content:"/";color:#C4CDDB;}
.crumb a{color:var(--text-3);}
.crumb a:hover{color:var(--primary);}
.crumb .current{color:var(--text-2);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ Post hero ============ */
.post-hero{
  position:relative;background:var(--surface);border-bottom:1px solid var(--border);
  padding:28px 0 40px;overflow:hidden;
}
.post-hero::after{
  content:"";position:absolute;right:-140px;top:-180px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(42,91,215,.07),rgba(42,91,215,0) 68%);
  pointer-events:none;
}
.post-hero .container{position:relative;z-index:1;}
.post-head{margin-top:22px;max-width:860px;}
.post-cat{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:8px;
  background:var(--primary-soft);color:var(--primary-dark);font-size:12.5px;font-weight:700;letter-spacing:.02em;
}
.post-title{
  margin-top:14px;font-size:clamp(26px,3.2vw,42px);line-height:1.3;color:var(--text);letter-spacing:-.02em;
}
.post-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:18px;
  font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;
}
.post-meta .dot{color:#C4CDDB;}
.post-meta .tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  border:1px solid var(--border);background:#FAFCFF;color:var(--text-2);font-size:12.5px;
}

/* ============ Post layout ============ */
.post-main{padding:48px 0 72px;}
.post-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:48px;align-items:start;}
.post-col{min-width:0;}
.article-body{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:34px 38px 40px;box-shadow:var(--shadow-1);
  font-size:16px;line-height:1.85;color:var(--text-2);
  overflow-wrap:break-word;word-break:break-word;
  max-width:820px;
}
.article-body h2{
  position:relative;margin:38px 0 14px;padding-left:14px;
  font-size:clamp(19px,1.9vw,24px);color:var(--text);line-height:1.45;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.26em;bottom:.26em;width:4px;border-radius:2px;background:var(--primary);
}
.article-body h2:first-child{margin-top:0;}
.article-body h3{margin:28px 0 10px;font-size:18px;color:var(--text);}
.article-body h4{margin:22px 0 8px;font-size:16px;color:var(--text);}
.article-body p{margin:0 0 16px;}
.article-body strong{color:var(--text);font-weight:700;}
.article-body em{font-style:normal;color:var(--primary-dark);}
.article-body ul,.article-body ol{margin:0 0 18px;}
.article-body ul li{position:relative;padding-left:18px;margin-bottom:10px;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.74em;width:6px;height:6px;border-radius:50%;background:var(--primary);
}
.article-body ol{counter-reset:list-n;}
.article-body ol li{position:relative;padding-left:28px;margin-bottom:10px;counter-increment:list-n;}
.article-body ol li::before{
  content:counter(list-n);position:absolute;left:0;top:.42em;width:19px;height:19px;border-radius:6px;
  background:var(--primary-soft);color:var(--primary-dark);font-size:11.5px;font-weight:700;
  display:grid;place-items:center;line-height:1;
}
.article-body li>ul,.article-body li>ol{margin-top:8px;margin-bottom:6px;}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;background:var(--primary-soft);
  border-left:4px solid var(--primary);border-radius:0 10px 10px 0;color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body pre{
  margin:20px 0;padding:16px 18px;background:#F0F3F8;border:1px solid var(--border);border-radius:12px;
  overflow-x:auto;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  font-size:13.5px;line-height:1.75;color:#1F2A3D;
}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  font-size:.92em;background:#F0F3F8;border-radius:6px;padding:2px 6px;color:#22314D;
}
.article-body pre code{background:none;padding:0;font-size:inherit;}
.article-body img{border-radius:12px;margin:20px 0;height:auto;}
.article-body figure{margin:22px 0;}
.article-body figure img{margin:0;}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:8px;line-height:1.7;}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--primary-dark);}
.article-body hr{border:0;border-top:1px solid var(--hair);margin:32px 0;}
.article-body table{width:100%;margin:20px 0;font-size:14px;}
.article-body th,.article-body td{border:1px solid var(--border);padding:10px 12px;text-align:left;vertical-align:top;}
.article-body th{background:#F7F9FD;color:var(--text);font-weight:700;}
.empty-note{text-align:center;padding:52px 20px 44px;}
.empty-note svg{width:46px;height:46px;margin:0 auto 16px;fill:none;stroke:var(--text-3);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.empty-note h2{margin:0 0 10px;padding-left:0;font-size:20px;color:var(--text);}
.empty-note h2::before{display:none;}
.empty-note p{font-size:14px;color:var(--text-3);max-width:440px;margin:0 auto 22px;}

/* ============ Post actions ============ */
.post-actions{
  max-width:820px;margin:26px 0 0;padding:20px 24px;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-1);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
}
.chips{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.chip{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  background:var(--accent-soft);color:#C24A16;font-size:12.5px;font-weight:600;
}
.post-actions .label{font-size:13px;color:var(--text-3);margin-right:4px;}

/* ============ Side cards ============ */
.post-side{display:none;min-width:0;}
.post-side-inner{position:sticky;top:32px;display:flex;flex-direction:column;gap:16px;}
.side-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px 18px 20px;box-shadow:var(--shadow-1);
}
.side-card h2{
  font-size:14px;color:var(--text);margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--hair);
  letter-spacing:.02em;
}
.side-card ul{display:flex;flex-direction:column;gap:12px;}
.side-card li a{display:flex;gap:9px;align-items:flex-start;font-size:13.5px;line-height:1.65;color:var(--text-2);}
.side-card li a:hover{color:var(--primary);}
.side-card li a .idx{
  flex:0 0 auto;width:20px;height:20px;margin-top:2px;border-radius:6px;background:var(--primary-soft);
  color:var(--primary-dark);font-size:11px;font-weight:700;display:grid;place-items:center;line-height:1;
}
.side-card p{font-size:13.5px;line-height:1.8;color:var(--text-3);}
.side-card .side-btn{
  margin-top:14px;display:flex;align-items:center;justify-content:center;height:40px;border-radius:var(--radius-sm);
  background:var(--primary-soft);color:var(--primary-dark);font-size:13.5px;font-weight:700;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.side-card .side-btn:hover{background:var(--primary);color:#fff;}

/* ============ Related cards ============ */
.related{background:transparent;padding:0 0 88px;}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.post-card{
  display:flex;flex-direction:column;height:100%;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.post-card:hover{transform:translateY(-2px);border-color:rgba(42,91,215,.28);box-shadow:var(--shadow-2);}
.post-card .cover{position:relative;aspect-ratio:16/9;background:#EDF1F8;overflow:hidden;}
.post-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.post-card:hover .cover img{transform:scale(1.04);}
.post-card .cover .badge{
  position:absolute;left:12px;top:12px;display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:8px;background:rgba(255,255,255,.94);color:var(--primary-dark);font-size:12px;font-weight:700;
  box-shadow:0 2px 8px rgba(18,26,43,.12);
}
.post-card .body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.post-card h3{
  font-size:16.5px;line-height:1.5;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card p{
  font-size:13.5px;line-height:1.72;color:var(--text-3);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card .foot{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--hair);
  display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--text-3);
  font-variant-numeric:tabular-nums;
}
.post-card .foot svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s var(--ease);}
.post-card:hover .foot svg{transform:translateX(3px);color:var(--primary);}

/* ============ Footer ============ */
.site-footer{background:#0F1A2E;color:rgba(255,255,255,.68);padding:56px 0 0;margin-top:auto;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px;}
.site-footer h4{color:#fff;font-size:14px;margin-bottom:16px;font-weight:700;letter-spacing:.02em;}
.site-footer ul{display:flex;flex-direction:column;gap:11px;}
.site-footer li{font-size:13.5px;line-height:1.7;color:rgba(255,255,255,.6);}
.site-footer a{color:rgba(255,255,255,.68);font-size:13.5px;transition:color .18s var(--ease);}
.site-footer a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand strong{color:#fff;font-size:15px;font-weight:700;}
.site-footer .footer-grid>div:first-child p{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.6);max-width:330px;}
.footer-bottom{
  margin-top:42px;padding:18px 0 22px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.48);
}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:18px;}
.footer-bottom a{font-size:12.5px;color:rgba(255,255,255,.55);}

/* ============ Responsive ============ */
@media (max-width:1199px){
  :root{--side-w:76px;}
  .sidebar{padding:16px 10px 14px;align-items:center;}
  .side-brand{border-bottom:0;margin-bottom:10px;padding:4px 0 8px;justify-content:center;}
  .brand-text{display:none;}
  .nav-item{justify-content:center;padding:0;height:46px;}
  .nav-label{display:none;}
  .nav-item.is-active::before{left:-10px;}
  .side-cta{width:46px;height:46px;padding:0;font-size:0;}
  .side-cta::after{
    content:"";width:18px;height:18px;
    background:
      linear-gradient(currentColor,currentColor) center/12px 2px no-repeat,
      linear-gradient(currentColor,currentColor) center/2px 12px no-repeat;
    border-radius:2px;
  }
  .side-cta{color:#fff;}
  .post-layout{gap:32px;}
  .article-body{padding:30px 30px 36px;}
}
@media (min-width:1200px){
  .post-layout{grid-template-columns:minmax(0,1fr) 240px;}
  .post-side{display:block;}
}
@media (max-width:991px){
  .sidebar{display:none;}
  .shell{margin-left:0;}
  .mobile-bar{
    display:flex;align-items:center;justify-content:space-between;
    position:sticky;top:0;z-index:70;height:60px;padding:0 16px;
    background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);
  }
  .mobile-brand{display:flex;align-items:center;gap:9px;font-size:14.5px;font-weight:700;color:var(--text);}
  .mobile-brand .brand-mark{width:30px;height:30px;border-radius:9px;font-size:14px;}
  .menu-btn{
    width:44px;height:44px;display:grid;place-items:center;border-radius:var(--radius-sm);color:var(--text);
    transition:background .18s var(--ease),color .18s var(--ease);
  }
  .menu-btn:hover{background:var(--primary-soft);color:var(--primary-dark);}
  .menu-btn svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;}
  .drawer{
    display:flex;flex-direction:column;gap:14px;
    position:fixed;left:0;top:0;bottom:0;width:288px;max-width:86vw;z-index:90;
    background:var(--surface);padding:18px 14px;overflow-y:auto;
    transform:translateX(-102%);transition:transform .24s var(--ease);
    box-shadow:0 0 40px rgba(18,26,43,.18);
  }
  .drawer.is-open{transform:translateX(0);}
  .drawer .side-brand{display:flex;border-bottom:1px solid var(--hair);padding:4px 6px 14px;margin-bottom:4px;}
  .drawer .brand-text{display:flex;}
  .drawer .nav-item{justify-content:flex-start;padding:0 12px;height:46px;}
  .drawer .nav-label{display:inline;}
  .drawer .nav-item.is-active::before{left:-14px;}
  .drawer .side-cta{width:100%;height:46px;font-size:14px;}
  .drawer .side-cta::after{display:none;}
  .drawer-mask{
    display:block;position:fixed;inset:0;z-index:80;background:rgba(18,26,43,.45);
    opacity:0;pointer-events:none;transition:opacity .24s var(--ease);
  }
  .drawer-mask.is-open{opacity:1;pointer-events:auto;}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px;}
  .container{padding:0 24px;}
  .section{padding:56px 0;}
  .post-main{padding:36px 0 56px;}
  .related{padding-bottom:64px;}
}
@media (max-width:640px){
  .container{padding:0 16px;}
  .section{padding:48px 0;}
  .post-hero{padding:20px 0 30px;}
  .article-body{padding:24px 20px 28px;border-radius:12px;font-size:15.5px;}
  .article-body h2{margin-top:30px;}
  .post-actions{padding:16px 18px;flex-direction:column;align-items:flex-start;}
  .post-actions .btn{width:100%;}
  .grid-3{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .crumb .current{max-width:100%;white-space:normal;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category2 */
:root{
  --brand:#2A5BD7;
  --brand-deep:#1B3F9E;
  --brand-soft:#E8EFFE;
  --accent:#FF7A45;
  --accent-soft:#FFF1E9;
  --teal:#12B5A5;
  --teal-soft:#E6F7F5;
  --bg:#F5F8FC;
  --surface:#FFFFFF;
  --ink:#121A2B;
  --ink-2:#4A5568;
  --ink-3:#8A94A6;
  --line:#E3E9F2;
  --hair:rgba(18,26,43,.08);
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --shadow-1:0 1px 2px rgba(18,26,43,.04),0 6px 18px rgba(42,91,215,.06);
  --shadow-2:0 8px 28px rgba(42,91,215,.14);
  --ease:cubic-bezier(.2,.6,.3,1);
  --sidebar-w:224px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",Inter,ui-sans-serif,system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em;line-height:1.35}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;border-radius:var(--r-img)}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--brand-deep)}
button{font:inherit;cursor:pointer}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}

/* ============ 左侧竖向导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--surface);
  border-right:1px solid var(--line);
  padding:24px 16px 20px;
  display:flex;flex-direction:column;gap:22px;
  z-index:60;
  overflow-y:auto;
}
.sidebar-brand{display:flex;align-items:center;gap:10px;padding:2px 6px 0}
.brand-mark{
  flex:0 0 auto;
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  color:#fff;display:grid;place-items:center;
  font-size:18px;font-weight:700;letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:15px;color:var(--ink);font-weight:700}
.brand-text em{font-style:normal;font-size:11px;letter-spacing:.18em;color:var(--ink-3);margin-top:2px}

.nav{display:flex;flex-direction:column;gap:4px}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;border-radius:10px;
  font-size:14.5px;color:var(--ink-2);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-item:hover{background:var(--brand-soft);color:var(--brand-deep)}
.nav-item.is-active{background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
.nav-item.is-active::before{
  content:'';position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.nav-ico{display:inline-flex;flex:0 0 auto;color:currentColor}
.nav-ico svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.nav-ico svg circle[fill="currentColor"]{fill:currentColor;stroke:none}
.sidebar-cta{
  margin-top:auto;display:block;text-align:center;
  background:var(--brand);color:#fff;
  border-radius:999px;padding:12px 10px;
  font-size:14.5px;font-weight:600;
  box-shadow:0 6px 16px rgba(42,91,215,.22);
  transition:background .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.sidebar-cta:hover{background:#2f63e0;color:#fff;transform:translateY(-1px);box-shadow:0 8px 22px rgba(42,91,215,.3)}
.sidebar-cta:active{transform:translateY(1px)}

/* ============ 主区域与移动端顶栏 ============ */
.main-wrap{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.topbar{
  display:none;
  position:sticky;top:0;z-index:50;
  height:60px;align-items:center;justify-content:space-between;
  padding:0 16px;
  background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
}
.topbar-brand{display:flex;align-items:center;gap:9px;color:var(--ink)}
.topbar-brand .brand-mark{width:32px;height:32px;border-radius:9px;font-size:15px}
.topbar-brand strong{font-size:15px;color:var(--ink)}
.nav-toggle{
  width:44px;height:44px;border-radius:10px;
  border:1px solid var(--line);background:#fff;color:var(--ink);
  display:grid;place-items:center;
}
.nav-toggle svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round}
.nav-toggle:hover{border-color:rgba(42,91,215,.4);color:var(--brand)}
.nav-mask{
  position:fixed;inset:0;z-index:55;
  background:rgba(18,26,43,.45);
  opacity:0;visibility:hidden;transition:opacity .2s var(--ease),visibility .2s var(--ease);
}
.nav-mask.is-open{opacity:1;visibility:visible}

/* ============ 通用按钮 / 徽章 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:13px 24px;border-radius:999px;border:1px solid transparent;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(42,91,215,.22)}
.btn-primary:hover{background:#2f63e0;color:#fff;transform:translateY(-1px);box-shadow:0 8px 22px rgba(42,91,215,.3)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 3px 10px rgba(42,91,215,.22)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:rgba(42,91,215,.4);color:var(--brand-deep);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.badge{display:inline-flex;align-items:center;font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;letter-spacing:.02em}
.badge-done{color:#0B8F82;background:var(--teal-soft)}
.badge-doing{color:var(--brand-deep);background:var(--brand-soft)}
.badge-idle{color:var(--ink-3);background:#F1F4F9}

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:52px 0 68px;
  background:
    radial-gradient(880px 420px at 82% -10%,rgba(42,91,215,.09),transparent 68%),
    var(--surface);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.hero::after{
  content:'';position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(18,26,43,.028) 1px,transparent 1px),linear-gradient(90deg,rgba(18,26,43,.028) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.65),transparent 78%);
}
.hero .container{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:20px}
.breadcrumb li+li::before{content:'/';margin-right:8px;color:#C7CEDA}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb li[aria-current]{color:var(--ink-2);font-weight:600}
.hero h1{font-size:clamp(28px,3.4vw,44px);letter-spacing:-.02em}
.hero-sub{margin-top:16px;font-size:18px;font-weight:600;color:var(--ink)}
.hero-desc{margin-top:12px;max-width:560px;font-size:15.5px;color:var(--ink-2)}
.hero-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:7/5;object-fit:cover;border-radius:20px;box-shadow:var(--shadow-2);background:#EDF1F8}
.hero-chip{
  position:absolute;left:-18px;bottom:26px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:12px 20px;box-shadow:var(--shadow-1);
  display:flex;flex-direction:column;line-height:1.35;
}
.hero-chip span{font-size:22px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums}
.hero-chip small{font-size:12px;color:var(--ink-3)}

/* ============ 板块 ============ */
.section{padding:88px 0;background:var(--bg)}
.section-white{background:var(--surface)}
.section-head{max-width:720px;margin-bottom:44px}
.section-head h2{font-size:clamp(22px,2.4vw,32px);letter-spacing:-.02em}
.section-head p{margin-top:12px;color:var(--ink-2);font-size:15.5px}

/* ============ 交错图文行 ============ */
.mode-rows{display:flex;flex-direction:column;gap:28px}
.mode-row{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:28px;box-shadow:var(--shadow-1);
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.mode-row:hover{box-shadow:var(--shadow-2);border-color:rgba(42,91,215,.2);transform:translateY(-2px)}
.mode-row.is-reverse .mode-media{order:2}
.mode-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);background:#EDF1F8}
.mode-index{
  display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:.16em;
  color:var(--brand);background:var(--brand-soft);
  padding:4px 10px;border-radius:6px;font-variant-numeric:tabular-nums;
}
.mode-body h3{font-size:20px;margin:14px 0 8px}
.mode-body p{font-size:15px;color:var(--ink-2)}
.tag-pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag-pills li{
  font-size:12.5px;color:var(--brand-deep);
  background:var(--brand-soft);border:1px solid rgba(42,91,215,.14);
  padding:5px 12px;border-radius:999px;
}
.tag-pills li.is-accent{color:#C64A16;background:var(--accent-soft);border-color:rgba(255,122,69,.22)}
.text-link{display:inline-flex;align-items:center;gap:6px;margin-top:20px;font-size:14.5px;font-weight:600;color:var(--brand)}
.text-link svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s var(--ease)}
.text-link:hover svg{transform:translateX(4px)}

/* ============ 挑选维度（Foundation 栅格） ============ */
.choose-grid{margin-left:-14px;margin-right:-14px}
.choose-grid>.cell{padding-left:14px;padding-right:14px}
.pill-panel{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:28px;box-shadow:var(--shadow-1);height:100%;
}
.pill-panel h3{font-size:18px;margin-bottom:6px}
.pill-panel>p{font-size:14.5px;color:var(--ink-2);margin-bottom:20px}
.pill-cloud{display:flex;flex-wrap:wrap;gap:10px}
.pill-cloud li{
  font-size:13.5px;color:var(--ink);
  background:#fff;border:1px solid var(--line);
  padding:8px 16px;border-radius:999px;
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.pill-cloud li:hover{border-color:rgba(42,91,215,.4);color:var(--brand-deep);background:var(--brand-soft)}
.pill-cloud li.is-hot{border-color:rgba(255,122,69,.35);color:#C64A16;background:var(--accent-soft)}
.info-stack{display:flex;flex-direction:column;gap:20px}
.info-card{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:24px;box-shadow:var(--shadow-1);
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.info-card:hover{box-shadow:var(--shadow-2);border-color:rgba(42,91,215,.2);transform:translateY(-2px)}
.info-card .ico{display:inline-flex;width:40px;height:40px;border-radius:11px;background:var(--brand-soft);color:var(--brand);align-items:center;justify-content:center;margin-bottom:14px}
.info-card .ico svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.info-card h3{font-size:17px;margin-bottom:8px}
.info-card p{font-size:14.5px;color:var(--ink-2)}

/* ============ 阶段进度 ============ */
.stage-list{display:flex;flex-direction:column;gap:14px}
.stage-row{
  display:grid;grid-template-columns:150px 1fr 240px auto;
  gap:20px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:16px 20px;box-shadow:var(--shadow-1);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.stage-row:hover{border-color:rgba(42,91,215,.2);box-shadow:var(--shadow-2)}
.stage-name{display:flex;align-items:center;gap:9px;font-weight:600;color:var(--ink);font-size:15px}
.stage-dot{width:8px;height:8px;border-radius:50%;background:var(--brand);flex:0 0 auto}
.stage-row:nth-child(1) .stage-dot,.stage-row:nth-child(2) .stage-dot{background:var(--teal)}
.stage-row:nth-child(4) .stage-dot{background:#C7CEDA}
.stage-note{font-size:14px;color:var(--ink-2)}
.stage-progress{display:flex;align-items:center;gap:12px}
.progress-bar{flex:1;height:8px;border-radius:999px;background:#EDF1F8;overflow:hidden}
.progress-bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--accent))}
.stage-progress b{font-size:13px;color:var(--ink);font-weight:800;font-variant-numeric:tabular-nums;min-width:42px;text-align:right}
.stage-foot{margin-top:24px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;font-size:13.5px;color:var(--ink-3)}

/* ============ FAQ（覆盖 Foundation Accordion） ============ */
.faq-wrap{max-width:880px}
.accordion{background:transparent;border:0;margin:0;border-top:1px solid var(--line)}
.accordion .accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent}
.accordion .accordion-title{
  display:block;position:relative;
  padding:22px 52px 22px 0;
  font-size:16.5px;font-weight:600;color:var(--ink);
  background:transparent;border:0;
  transition:color .18s var(--ease);
}
.accordion .accordion-title:hover{color:var(--brand)}
.accordion .accordion-title::before{
  content:'+';position:absolute;right:8px;top:50%;
  transform:translateY(-50%);
  font-size:24px;font-weight:400;line-height:1;color:var(--ink-3);
  transition:transform .2s var(--ease),color .2s var(--ease);
}
.accordion .accordion-item.is-active .accordion-title{color:var(--brand)}
.accordion .accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(45deg);color:var(--brand)}
.accordion .accordion-content{padding:0 52px 24px 0;background:transparent;border:0;color:var(--ink-2);font-size:15px;line-height:1.85;max-width:760px}

/* ============ CTA 带 ============ */
.cta-band{position:relative;overflow:hidden;background:var(--brand-soft);padding:72px 0}
.cta-band::before{
  content:'';position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.12;
}
.cta-band .container{position:relative;z-index:1}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(22px,2.4vw,30px);color:var(--brand-deep)}
.cta-inner p{margin-top:10px;font-size:15.5px;color:var(--ink-2);max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{background:#101828;color:#AEB8CB;padding:64px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{width:36px;height:36px;border-radius:10px;font-size:17px}
.footer-brand strong{color:#fff;font-size:16px;letter-spacing:-.01em}
.site-footer p{font-size:14px;line-height:1.85;color:#98A3B8;max-width:320px}
.site-footer h4{color:#fff;font-size:14px;margin-bottom:16px;letter-spacing:.02em}
.site-footer ul li{margin-bottom:10px;font-size:14px}
.site-footer a{color:#AEB8CB}
.site-footer a:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8B96AB;
}
.footer-bottom .links{display:flex;gap:18px}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  :root{--sidebar-w:76px}
  .sidebar{padding:20px 10px 18px;align-items:center}
  .brand-text{display:none}
  .nav-item{justify-content:center;padding:0;gap:0}
  .nav-label{display:none}
  .sidebar-brand{padding:0;justify-content:center}
  .sidebar-cta{font-size:0;padding:12px 0;width:100%}
  .sidebar-cta::after{content:'开始';font-size:12.5px;font-weight:600}
  .hero-chip{left:12px}
}
@media (max-width:991px){
  :root{--sidebar-w:0}
  .topbar{display:flex}
  .sidebar{
    width:272px;padding:22px 16px;
    transform:translateX(-100%);
    box-shadow:var(--shadow-2);
    transition:transform .24s var(--ease);
    align-items:stretch;
  }
  .sidebar.is-open{transform:translateX(0)}
  .brand-text{display:flex}
  .nav-label{display:block}
  .nav-item{justify-content:flex-start;padding:0 12px;gap:10px}
  .sidebar-cta{font-size:14.5px;padding:12px 10px}
  .sidebar-cta::after{content:none}
  .main-wrap{margin-left:0}
  .container{padding:0 24px}
  .hero{padding:40px 0 52px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-chip{left:16px;bottom:16px}
  .section{padding:60px 0}
  .section-head{margin-bottom:32px}
  .mode-row{grid-template-columns:1fr;gap:22px;padding:22px}
  .mode-row.is-reverse .mode-media{order:0}
  .stage-row{grid-template-columns:1fr;gap:10px;padding:18px}
  .stage-progress{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:24px}
}
@media (max-width:767px){
  .choose-grid{margin-left:0;margin-right:0}
  .choose-grid>.cell{padding-left:0;padding-right:0}
  .choose-grid>.cell+.cell{margin-top:20px}
}
@media (max-width:575px){
  .container{padding:0 16px}
  .hero-desc{font-size:15px}
  .hero-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .accordion .accordion-title{padding-right:40px;font-size:15.5px}
  .accordion .accordion-content{padding-right:0}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
/* ============ 1. 设计变量 ============ */
:root{
  --brand:#2A5BD7;
  --brand-deep:#1B3F9E;
  --brand-hover:#3366E6;
  --brand-soft:#E8EFFE;
  --brand-tint:#F0F5FF;
  --accent:#FF7A45;
  --accent-soft:#FFF1E9;
  --teal:#12B5A5;
  --teal-soft:#E6F7F5;
  --bg:#F5F8FC;
  --surface:#FFFFFF;
  --ink:#121A2B;
  --ink-2:#4A5568;
  --ink-3:#8A94A6;
  --line:#E3E9F2;
  --hair:rgba(18,26,43,.08);
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(18,26,43,.04), 0 6px 18px rgba(42,91,215,.06);
  --sh-2:0 8px 28px rgba(42,91,215,.14);
  --ease:cubic-bezier(.2,.6,.3,1);
  --t:200ms cubic-bezier(.2,.6,.3,1);
  --nav-w:224px;
  --nav-w-mini:76px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",Inter,ui-sans-serif,system-ui,-apple-system,sans-serif;
}

/* ============ 2. 基础重置 ============ */
*,*::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;
}
body.is-locked{overflow:hidden;}
h1,h2,h3,h4,p,ul,ol,li,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color var(--t);}
a:hover,a:focus{color:var(--brand-deep);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
strong{font-weight:700;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
section[id]{scroll-margin-top:24px;}

/* ============ 3. 覆盖 Foundation 默认 ============ */
.grid-x.grid-padding-x{margin-left:-8px;margin-right:-8px;margin-bottom:-16px;}
.grid-x.grid-padding-x > .cell{padding-left:8px;padding-right:8px;padding-bottom:16px;}
.accordion,.accordion-item,.accordion-title,.accordion-content{
  background:transparent;color:inherit;font-size:inherit;margin:0;padding:0;border:0;list-style:none;
}
a.accordion-title{text-decoration:none;}
input,textarea,select{font-family:inherit;font-size:15px;border-radius:var(--r-btn);}

/* ============ 4. 布局骨架 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.page{
  margin-left:var(--nav-w);
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.page > main{flex:1 0 auto;}

/* ============ 5. 左侧竖向导航 ============ */
.sidenav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--nav-w);
  background:var(--surface);
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  padding:22px 16px 20px;
  z-index:60;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:4px 6px 0;
  color:var(--ink);
}
.brand:hover{color:var(--ink);}
.brand-mark{
  flex:0 0 auto;
  width:38px;height:38px;
  border-radius:12px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#fff;
  display:grid;place-items:center;
  font-size:18px;font-weight:800;line-height:1;
  box-shadow:0 6px 16px rgba(42,91,215,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;}
.brand-text em{font-style:normal;font-size:12px;color:var(--ink-3);letter-spacing:.16em;}
.nav-caption{
  margin:24px 8px 10px;
  font-size:11px;
  letter-spacing:.18em;
  color:var(--ink-3);
  text-transform:uppercase;
}
.nav{display:flex;flex-direction:column;gap:4px;}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  height:44px;
  padding:0 12px;
  border-radius:10px;
  font-size:14.5px;
  font-weight:500;
  color:var(--ink-2);
  transition:background var(--t),color var(--t);
}
.nav-item:hover{background:var(--brand-soft);color:var(--brand-deep);}
.nav-item.is-active{background:var(--brand-soft);color:var(--brand-deep);font-weight:700;}
.nav-item.is-active::before{
  content:"";
  position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;
  background:var(--brand);
}
.nav-ico{flex:0 0 20px;width:20px;height:20px;display:block;}
.nav-ico svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.nav-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.sidenav-cta{margin-top:auto;padding-top:18px;}
.sidenav-note{margin-top:10px;font-size:12px;line-height:1.6;color:var(--ink-3);padding:0 4px;}
.cta-ico{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;}

/* ============ 6. 按钮 / 标签 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.01em;
  border:1px solid transparent;
  cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t),box-shadow var(--t),transform var(--t);
}
.btn-pill{border-radius:999px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(42,91,215,.24);}
.btn-primary:hover,.btn-primary:focus{background:var(--brand-hover);color:#fff;box-shadow:0 10px 24px rgba(42,91,215,.30);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 12px rgba(42,91,215,.24);}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--brand-deep);}
.btn-ghost:hover,.btn-ghost:focus{background:var(--brand-soft);border-color:rgba(42,91,215,.35);color:var(--brand-deep);}
.btn-text{background:transparent;color:var(--brand);padding:0 10px;}
.btn-text:hover,.btn-text:focus{background:var(--brand-soft);color:var(--brand-deep);}
.btn-text .arrow{transition:transform var(--t);display:inline-block;}
.btn-text:hover .arrow{transform:translateX(3px);}
.btn-light{background:#fff;color:var(--brand-deep);box-shadow:0 8px 22px rgba(12,28,60,.22);}
.btn-light:hover,.btn-light:focus{background:#F4F8FF;color:var(--brand-deep);transform:translateY(-1px);}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.5);color:#fff;}
.btn-outline-light:hover,.btn-outline-light:focus{background:rgba(255,255,255,.14);border-color:#fff;color:#fff;}
.btn-block{width:100%;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  background:var(--brand-soft);
  color:var(--brand-deep);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.06em;
  margin-bottom:16px;
}
.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
  white-space:nowrap;
}
.badge-done{background:var(--teal-soft);color:#0E8E82;}
.badge-doing{background:var(--brand-soft);color:var(--brand-deep);}
.badge-wait{background:#EEF1F6;color:var(--ink-3);}

/* ============ 7. 顶部栏与抽屉（移动端） ============ */
.topbar{
  display:none;
  position:sticky;
  top:0;
  z-index:70;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  height:64px;
  padding:0 16px;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.topbar-brand{display:flex;align-items:center;gap:10px;color:var(--ink);}
.topbar-brand:hover{color:var(--ink);}
.hamburger{
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:background var(--t),border-color var(--t);
}
.hamburger:hover{background:var(--brand-soft);border-color:rgba(42,91,215,.3);}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);}
.drawer{
  position:fixed;
  top:0;left:0;bottom:0;
  width:290px;max-width:84vw;
  background:var(--surface);
  z-index:95;
  padding:18px 16px 24px;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  transform:translateX(-102%);
  transition:transform 240ms var(--ease);
  box-shadow:0 18px 48px rgba(18,26,43,.2);
}
.drawer.is-open{transform:none;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px;}
.drawer-close{
  width:38px;height:38px;border-radius:11px;border:1px solid var(--line);
  display:grid;place-items:center;font-size:20px;line-height:1;color:var(--ink-2);
}
.drawer-close:hover{background:var(--brand-soft);color:var(--brand-deep);}
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(18,26,43,.45);
  opacity:0;visibility:hidden;
  transition:opacity 220ms var(--ease),visibility 220ms var(--ease);
  z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ============ 8. 面包屑与首屏 ============ */
.page-hero{padding:30px 0 0;}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:0;
  font-size:13px;
  color:var(--ink-3);
  margin-bottom:20px;
}
.crumb li{display:inline-flex;align-items:center;}
.crumb li + li::before{content:"/";margin:0 9px;color:#C6CEDD;}
.crumb a{color:var(--ink-3);}
.crumb a:hover{color:var(--brand);}
.crumb [aria-current]{color:var(--ink-2);font-weight:500;}

.hero-card{
  position:relative;
  display:grid;
  grid-template-columns:7fr 5fr;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.hero-copy{padding:52px 48px;display:flex;flex-direction:column;justify-content:center;}
.hero-copy h1{
  font-size:clamp(28px,3.4vw,44px);
  font-weight:700;
  line-height:1.22;
  letter-spacing:-.01em;
  margin-bottom:14px;
}
.hero-lead{
  font-size:17px;
  font-weight:600;
  color:var(--brand-deep);
  margin-bottom:16px;
}
.hero-text{
  font-size:15.5px;
  color:var(--ink-2);
  max-width:38em;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.hero-media{position:relative;min-height:360px;background:#EDF1F7;}
.hero-media img{width:100%;height:100%;object-fit:cover;min-height:360px;}
.hero-float{
  position:absolute;
  left:22px;bottom:22px;
  background:rgba(255,255,255,.96);
  border:1px solid var(--line);
  border-radius:12px;
  padding:12px 16px;
  box-shadow:var(--sh-1);
  display:flex;flex-direction:column;line-height:1.4;
}
.hero-float-label{font-size:12px;color:var(--ink-3);letter-spacing:.06em;}
.hero-float strong{font-size:15px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--brand-deep);}

/* ============ 9. 数据条 ============ */
.stats{padding:40px 0 0;}
.stats-grid{margin-bottom:0;}
.stat{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px 20px;
  box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.stat:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(42,91,215,.2);}
.stat strong{
  display:block;
  font-size:clamp(26px,2.6vw,34px);
  font-weight:800;
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--brand-deep);
  font-variant-numeric:tabular-nums;
  margin-bottom:6px;
}
.stat span{font-size:13px;color:var(--ink-3);}

/* ============ 10. 板块通用 ============ */
.section{padding:80px 0;}
.section.band{
  background:var(--brand-tint);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{max-width:720px;margin-bottom:36px;}
.section-head h2{
  font-size:clamp(22px,2.4vw,32px);
  font-weight:700;
  line-height:1.3;
  letter-spacing:-.01em;
  margin-bottom:12px;
}
.section-head p{color:var(--ink-2);font-size:15.5px;}

/* ============ 11. 步骤时间轴 ============ */
.timeline{position:relative;}
.tl-item{
  position:relative;
  display:grid;
  grid-template-columns:56px 1fr;
  gap:24px;
  padding-bottom:26px;
}
.tl-item::before{
  content:"";
  position:absolute;
  left:27px;top:60px;bottom:2px;
  width:2px;
  background:linear-gradient(180deg,var(--line),rgba(227,233,242,0));
}
.tl-item:last-child{padding-bottom:0;}
.tl-item:last-child::before{display:none;}
.tl-num{
  width:56px;height:56px;
  border-radius:16px;
  background:var(--surface);
  border:1px solid var(--line);
  display:grid;place-items:center;
  font-size:19px;font-weight:800;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  box-shadow:var(--sh-1);
  letter-spacing:-.02em;
}
.tl-body{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px 26px;
  box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.tl-body:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(42,91,215,.2);}
.tl-body h3{font-size:18px;font-weight:700;margin-bottom:8px;}
.tl-body p{color:var(--ink-2);font-size:15px;margin-bottom:12px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
}
.link-arrow span{display:inline-block;transition:transform var(--t);}
.link-arrow:hover span{transform:translateX(4px);}

/* ============ 12. 准备清单 ============ */
.check-card{
  display:flex;gap:14px;
  height:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px 22px;
  box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.check-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(42,91,215,.22);}
.check-dot{
  flex:0 0 22px;
  width:22px;height:22px;margin-top:4px;
  border-radius:50%;
  border:2px solid var(--brand);
  position:relative;
}
.check-dot::after{
  content:"";
  position:absolute;inset:4px;
  border-radius:50%;
  background:var(--brand);
}
.check-card h3{font-size:16.5px;font-weight:700;margin-bottom:6px;}
.check-card p{font-size:14.5px;color:var(--ink-2);}

/* ============ 13. 常见误区 ============ */
.pit-card{
  height:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 24px;
  box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.pit-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(255,122,69,.35);}
.pit-index{
  display:inline-grid;place-items:center;
  width:34px;height:34px;
  border-radius:10px;
  background:var(--accent-soft);
  color:#D9561F;
  font-size:13px;font-weight:800;
  font-variant-numeric:tabular-nums;
  margin-bottom:16px;
}
.pit-card h3{font-size:17px;font-weight:700;line-height:1.5;margin-bottom:10px;}
.pit-card p{font-size:14.5px;color:var(--ink-2);}

/* ============ 14. 任务进度 ============ */
.progress-panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:18px;
  padding:34px 36px;
  box-shadow:var(--sh-1);
}
.progress-panel .section-head{margin-bottom:26px;}
.task-list{display:flex;flex-direction:column;gap:18px;}
.task{display:flex;align-items:flex-start;gap:20px;}
.task-main{flex:1 1 auto;min-width:0;}
.task-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.task-name{font-size:15.5px;font-weight:600;}
.bar{height:8px;border-radius:999px;background:#E9EEF6;overflow:hidden;margin-top:10px;}
.bar-fill{
  display:block;height:100%;
  border-radius:999px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  transition:width 600ms var(--ease);
}
.task-pct{
  flex:0 0 auto;
  font-size:15px;font-weight:800;
  color:var(--brand-deep);
  font-variant-numeric:tabular-nums;
  line-height:2.1;
}

/* ============ 15. CTA 带 ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:20px;
  background:linear-gradient(135deg,#1B3F9E 0%,#2A5BD7 62%,#3A6CE8 100%);
  color:#fff;
  display:grid;
  grid-template-columns:1.35fr 1fr;
  gap:36px;
  align-items:center;
  padding:48px 52px;
  box-shadow:0 18px 44px rgba(27,63,158,.26);
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-90px;top:-110px;
  width:340px;height:340px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.18),rgba(255,255,255,0) 68%);
  pointer-events:none;
}
.cta-copy{position:relative;z-index:1;}
.cta-copy h2{
  font-size:clamp(22px,2.4vw,30px);
  font-weight:700;
  line-height:1.35;
  letter-spacing:-.01em;
  margin-bottom:12px;
}
.cta-copy p{color:rgba(255,255,255,.84);font-size:15.5px;margin-bottom:26px;max-width:34em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.cta-media{position:relative;z-index:1;}
.cta-media img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid rgba(255,255,255,.22);
  box-shadow:0 14px 34px rgba(9,22,52,.32);
  background:rgba(255,255,255,.08);
}

/* ============ 16. FAQ ============ */
.faq-wrap{max-width:880px;}
.faq{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.faq .accordion-item + .accordion-item{border-top:1px solid var(--line);}
.faq .accordion-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  padding:20px 24px;
  font-size:16.5px;
  font-weight:600;
  line-height:1.55;
  color:var(--ink);
  background:var(--surface);
  transition:color var(--t),background var(--t);
}
.faq .accordion-title::before{content:none;display:none;}
.faq .accordion-title::after{
  content:"+";
  flex:0 0 auto;
  font-size:20px;
  line-height:1;
  font-weight:400;
  color:var(--brand);
  transition:transform 200ms var(--ease),color var(--t);
}
.faq .accordion-title:hover{background:var(--brand-tint);color:var(--brand-deep);}
.faq .accordion-item.is-active .accordion-title{color:var(--brand-deep);}
.faq .accordion-item.is-active .accordion-title::after{transform:rotate(45deg);}
.faq .accordion-content{
  padding:0 24px 22px;
  font-size:15px;
  color:var(--ink-2);
  max-width:720px;
  background:var(--surface);
  border:0;
}
.faq-hint{
  margin-top:22px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  padding:18px 22px;
  border:1px dashed rgba(42,91,215,.35);
  border-radius:var(--r-card);
  background:rgba(255,255,255,.7);
  font-size:14.5px;
  color:var(--ink-2);
}

/* ============ 17. 页脚 ============ */
.site-footer{
  margin-top:auto;
  background:#0F1B33;
  color:rgba(255,255,255,.72);
  padding:60px 0 26px;
  font-size:14.5px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:32px;
}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:14px;}
.footer-brand .brand-mark{width:34px;height:34px;font-size:16px;border-radius:10px;}
.footer-brand strong{font-size:15.5px;color:#fff;letter-spacing:-.01em;}
.site-footer h4{color:#fff;font-size:14px;font-weight:700;letter-spacing:.02em;margin-bottom:16px;}
.site-footer ul li{margin-bottom:10px;line-height:1.7;}
.site-footer a{color:rgba(255,255,255,.72);}
.site-footer a:hover,.site-footer a:focus{color:#fff;text-decoration:underline;}
.site-footer p{color:rgba(255,255,255,.62);line-height:1.8;max-width:32em;}
.footer-bottom{
  margin-top:40px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:rgba(255,255,255,.55);
}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:18px;}

/* ============ 18. 响应式 ============ */
@media (max-width:1199px){
  .page{margin-left:var(--nav-w-mini);}
  .sidenav{width:var(--nav-w-mini);padding:18px 12px;align-items:center;}
  .brand{flex-direction:column;gap:8px;padding:0;}
  .brand-text{display:none;}
  .nav-caption{display:none;}
  .nav{margin-top:18px;width:100%;align-items:center;}
  .nav-item{justify-content:center;padding:0;width:44px;}
  .nav-label{display:none;}
  .sidenav-cta{width:100%;display:flex;justify-content:center;}
  .sidenav-cta-btn{width:44px;padding:0;}
  .sidenav-cta-btn span{display:none;}
  .sidenav-note{display:none;}
  .container{padding:0 24px;}
}
@media (max-width:991px){
  .sidenav{display:none;}
  .topbar{display:flex;}
  .page{margin-left:0;}
  .container{padding:0 24px;}
  .section{padding:56px 0;}
  .hero-card{grid-template-columns:1fr;}
  .hero-copy{padding:36px 28px;order:1;}
  .hero-media{min-height:240px;order:2;}
  .hero-media img{min-height:240px;}
  .hero-float{left:16px;bottom:16px;padding:10px 14px;}
  .cta-band{grid-template-columns:1fr;padding:36px 28px;gap:26px;}
  .cta-media{order:-1;}
  .progress-panel{padding:26px 22px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .section{padding:48px 0;}
  .container{padding:0 16px;}
  .page-hero{padding:22px 0 0;}
  .hero-copy{padding:28px 20px;}
  .hero-copy h1{font-size:26px;}
  .hero-lead{font-size:15.5px;}
  .hero-text{font-size:14.5px;margin-bottom:22px;}
  .hero-actions .btn{flex:1 1 auto;}
  .tl-item{grid-template-columns:44px 1fr;gap:14px;}
  .tl-num{width:44px;height:44px;border-radius:13px;font-size:16px;}
  .tl-item::before{left:21px;top:48px;}
  .tl-body{padding:20px 18px;}
  .task{flex-direction:column;gap:6px;}
  .task-pct{line-height:1.4;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .stat{padding:18px 16px;}
  .check-card{padding:18px 16px;}
  .cta-band{padding:28px 20px;border-radius:16px;}
  .cta-copy h2{font-size:21px;}
  .cta-actions .btn{width:100%;}
  .faq .accordion-title{padding:16px 18px;font-size:15.5px;}
  .faq .accordion-content{padding:0 18px 18px;}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;}
}

/* roulang page: category3 */
:root{
  --primary:#2A5BD7;
  --primary-dark:#1B3F9E;
  --primary-light:#4A78E8;
  --primary-soft:#E8EFFE;
  --accent:#FF7A45;
  --accent-soft:#FFF1E9;
  --teal:#12B5A5;
  --teal-dark:#0E8F83;
  --bg:#F5F8FC;
  --surface:#FFFFFF;
  --text:#121A2B;
  --text-2:#4A5568;
  --text-3:#8A94A6;
  --line:#E3E9F2;
  --hairline:rgba(18,26,43,.08);
  --radius-sm:10px;
  --radius:14px;
  --radius-lg:20px;
  --shadow-1:0 1px 2px rgba(18,26,43,.04), 0 6px 18px rgba(42,91,215,.06);
  --shadow-2:0 8px 28px rgba(42,91,215,.14);
  --ease:cubic-bezier(.2,.6,.3,1);
  --nav-w:224px;
  --nav-w-sm:76px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-num:Inter,ui-sans-serif,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;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-num),var(--font-cn);
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6,p,figure,blockquote{margin:0;padding:0;}
ul,ol,li{margin:0;padding:0;list-style:none;}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .18s var(--ease);}
button{font-family:inherit;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
::selection{background:var(--primary-soft);color:var(--primary-dark);}

/* ---------- layout shell ---------- */
.shell{position:relative;min-height:100vh;}
.shell-body{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}

/* ---------- side nav ---------- */
.side-nav{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  background:var(--surface);
  border-right:1px solid var(--line);
  padding:24px 16px 20px;
  display:flex;flex-direction:column;
  z-index:70;
}
.brand{display:flex;align-items:center;gap:10px;padding:0 6px 22px;text-decoration:none;}
.brand-mark{
  flex:0 0 auto;width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);
  color:#fff;font-weight:700;font-size:19px;display:grid;place-items:center;
  box-shadow:0 6px 16px rgba(42,91,215,.26);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;min-width:0;}
.brand-text strong{font-size:15px;font-weight:700;color:var(--text);letter-spacing:-.01em;white-space:nowrap;}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:.18em;}
.nav{display:flex;flex-direction:column;gap:4px;margin-top:4px;}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;border-radius:var(--radius-sm);
  color:var(--text-2);font-size:14.5px;font-weight:500;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-ico{display:flex;align-items:center;justify-content:center;flex:0 0 20px;}
.nav-ico svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.nav-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.nav-item:hover{background:var(--primary-soft);color:var(--primary-dark);}
.nav-item.is-active{background:var(--primary-soft);color:var(--primary-dark);font-weight:600;}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--primary);
}
.side-foot{margin-top:auto;padding-top:20px;}
.side-cta{width:100%;justify-content:center;}
.side-cta .ico{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- mobile topbar ---------- */
.topbar{
  display:none;align-items:center;justify-content:space-between;
  position:sticky;top:0;z-index:80;
  padding:12px 18px;background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.topbar .brand{padding:0;}
.hamburger{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;display:flex;flex-direction:column;justify-content:center;
  align-items:center;gap:5px;cursor:pointer;transition:border-color .18s var(--ease),background .18s var(--ease);
}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);}
.hamburger:hover{border-color:rgba(42,91,215,.4);background:var(--primary-soft);}
.drawer{padding:22px 18px;background:#fff;}
.drawer .brand{padding:0 0 20px;}
.drawer .nav-item{height:46px;}
.drawer .side-foot{margin-top:24px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  border-radius:999px;padding:13px 26px;
  font-size:15px;font-weight:600;line-height:1.2;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 18px rgba(42,91,215,.24);}
.btn-primary:hover{background:var(--primary-light);color:#fff;box-shadow:0 10px 26px rgba(42,91,215,.30);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 12px rgba(42,91,215,.22);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(255,122,69,.26);}
.btn-accent:hover{background:#FF8E60;color:#fff;box-shadow:0 10px 26px rgba(255,122,69,.32);}
.btn-accent:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--primary-dark);border-color:var(--line);}
.btn-ghost:hover{border-color:rgba(42,91,215,.42);background:var(--primary-soft);color:var(--primary-dark);}
.btn-quiet{background:transparent;color:var(--primary-dark);padding:13px 14px;}
.btn-quiet:hover{color:var(--primary);background:var(--primary-soft);}
.btn-sm{padding:10px 20px;font-size:14px;}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}

/* ---------- crumbs ---------- */
.crumbs{padding-top:26px;font-size:13px;color:var(--text-3);}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs li+li::before{content:"/";color:#C3CCDA;}
.crumbs a{color:var(--text-2);}
.crumbs a:hover{color:var(--primary);text-decoration:underline;}
.crumbs [aria-current="page"]{color:var(--text-3);}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;background:linear-gradient(180deg,#FFFFFF 0%,#F7FAFF 100%);
  border-bottom:1px solid var(--line);padding:48px 0 72px;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(560px 320px at 84% 4%, rgba(42,91,215,.12), transparent 68%),
    radial-gradient(420px 280px at 6% 96%, rgba(255,122,69,.10), transparent 70%);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(18,26,43,.045) 1px, transparent 1px),
                   linear-gradient(90deg, rgba(18,26,43,.045) 1px, transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(680px 420px at 70% 20%, #000, transparent 78%);
  -webkit-mask-image:radial-gradient(680px 420px at 70% 20%, #000, transparent 78%);
}
.cat-hero__grid{position:relative;z-index:1;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.1em;color:var(--primary);
  background:var(--primary-soft);border-radius:999px;padding:6px 14px;
}
.cat-hero h1{
  margin:18px 0 14px;
  font-size:clamp(28px,3.4vw,44px);font-weight:700;letter-spacing:-.01em;line-height:1.25;
}
.lead{font-size:16px;color:var(--text-2);max-width:44ch;}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 30px;}
.pill{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13px;font-weight:500;color:var(--text-2);
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 15px;
  box-shadow:0 1px 2px rgba(18,26,43,.03);
}
.pill i{width:6px;height:6px;border-radius:50%;background:var(--primary);display:block;}
.pill.is-accent i{background:var(--accent);}
.pill.is-teal i{background:var(--teal);}
.hero-visual{position:relative;}
.hero-visual>img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--radius-lg);box-shadow:var(--shadow-2);
  background:#EDF1F8;
}
.hero-float{
  position:absolute;left:-24px;bottom:-24px;
  display:flex;align-items:center;gap:14px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 20px;box-shadow:var(--shadow-2);
}
.hero-float .num{font-family:var(--font-num);font-size:22px;font-weight:800;color:var(--primary);font-variant-numeric:tabular-nums;letter-spacing:-.02em;}
.hero-float .cap{font-size:12.5px;color:var(--text-3);line-height:1.5;}

/* ---------- sections ---------- */
.section{padding:76px 0;}
.section--tight{padding:56px 0;}
.section--surface{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:720px;margin-bottom:36px;}
.section-head h2{margin:14px 0 12px;font-size:clamp(22px,2.4vw,32px);font-weight:700;letter-spacing:-.01em;line-height:1.3;}
.section-head p{color:var(--text-2);font-size:15px;}

/* ---------- tier cards ---------- */
.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.tier-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.tier-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(42,91,215,.28);}
.tier-media{position:relative;aspect-ratio:16/9;background:#EDF1F8;overflow:hidden;}
.tier-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.tier-card:hover .tier-media img{transform:scale(1.03);}
.tier-badge{
  position:absolute;top:12px;left:12px;padding:5px 13px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.02em;color:#fff;background:var(--primary);
  box-shadow:0 4px 12px rgba(42,91,215,.3);
}
.tier-badge.is-accent{background:var(--accent);box-shadow:0 4px 12px rgba(255,122,69,.3);}
.tier-body{display:flex;flex-direction:column;gap:10px;padding:20px 20px 22px;flex:1;}
.tier-body h3{font-size:18px;font-weight:600;letter-spacing:-.005em;}
.tier-body p{font-size:14.5px;color:var(--text-2);line-height:1.75;}
.tier-cond{
  margin-top:auto;display:flex;align-items:center;gap:8px;
  padding-top:13px;border-top:1px dashed var(--line);
  font-size:12.5px;color:var(--text-3);
}
.tier-cond svg{width:15px;height:15px;fill:none;stroke:var(--accent);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:0 0 15px;}

/* ---------- progress block ---------- */
.progress-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:28px;align-items:start;}
.panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow-1);
}
.panel h3{font-size:18px;font-weight:600;margin-bottom:6px;}
.panel .hint{font-size:13.5px;color:var(--text-3);margin-bottom:22px;}
.progress-track{height:8px;border-radius:999px;background:#E7EDF7;overflow:hidden;}
.progress-fill{
  height:100%;width:68%;border-radius:999px;
  background:linear-gradient(90deg,var(--primary) 0%,var(--accent) 100%);
}
.progress-meta{display:flex;align-items:baseline;justify-content:space-between;margin-top:14px;}
.progress-meta .label{font-size:13.5px;color:var(--text-2);}
.progress-meta .value{
  font-family:var(--font-num);font-size:26px;font-weight:800;color:var(--primary-dark);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.progress-ticks{display:flex;justify-content:space-between;margin-top:10px;font-size:12px;color:var(--text-3);}
.task-list{display:flex;flex-direction:column;gap:12px;}
.task-item{
  display:flex;align-items:center;gap:14px;
  border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:14px 16px;background:#FBFCFE;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.task-item:hover{border-color:rgba(42,91,215,.26);background:#fff;}
.task-ico{
  flex:0 0 34px;width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;background:var(--primary-soft);
}
.task-ico svg{width:17px;height:17px;fill:none;stroke:var(--primary-dark);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.task-text{flex:1;min-width:0;font-size:14.5px;color:var(--text);}
.task-text small{display:block;font-size:12.5px;color:var(--text-3);font-weight:400;}
.status{font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;white-space:nowrap;}
.status--done{background:rgba(18,181,165,.12);color:var(--teal-dark);}
.status--doing{background:var(--primary-soft);color:var(--primary-dark);}
.status--todo{background:#F1F4F9;color:var(--text-3);}

/* ---------- timeline ---------- */
.timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.timeline::before{
  content:"";position:absolute;top:22px;left:26px;right:26px;height:2px;
  background:linear-gradient(90deg,rgba(42,91,215,.42) 0%,rgba(255,122,69,.42) 100%);
}
.step{position:relative;}
.step-num{
  position:relative;z-index:1;width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;background:#fff;border:1px solid var(--line);
  font-family:var(--font-num);font-size:15px;font-weight:800;color:var(--primary);
  font-variant-numeric:tabular-nums;box-shadow:var(--shadow-1);
}
.step h3{margin-top:18px;font-size:17px;font-weight:600;}
.step p{margin-top:8px;font-size:14px;color:var(--text-2);}

/* ---------- faq ---------- */
.accordion{border:none;background:transparent;margin:0;}
.accordion .accordion-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  margin-bottom:12px;overflow:hidden;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.accordion .accordion-item:hover{border-color:rgba(42,91,215,.26);box-shadow:var(--shadow-1);}
.accordion .accordion-title{
  position:relative;display:block;background:transparent;border:none;
  padding:20px 60px 20px 22px;font-size:16.5px;font-weight:600;color:var(--text);
  line-height:1.6;transition:color .18s var(--ease),background .18s var(--ease);
}
.accordion .accordion-title:hover,
.accordion .accordion-title:focus{background:var(--primary-soft);color:var(--primary-dark);}
.accordion .accordion-title::before{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;line-height:1;color:var(--primary);
  transition:transform .2s var(--ease);
}
.accordion .accordion-item.is-active{border-color:rgba(42,91,215,.32);box-shadow:var(--shadow-1);}
.accordion .accordion-item.is-active .accordion-title{color:var(--primary-dark);background:var(--primary-soft);}
.accordion .accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(45deg);}
.accordion .accordion-content{
  display:none;background:#fff;border:none;border-top:1px solid var(--line);
  padding:20px 22px 24px;color:var(--text-2);font-size:15px;
}
.accordion .accordion-content p{max-width:720px;}
.accordion .accordion-content.is-open{display:block;}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  padding:52px 48px;border:1px solid rgba(42,91,215,.16);
  background-color:var(--primary-soft);
  background-image:linear-gradient(90deg,rgba(232,239,254,.97) 0%,rgba(232,239,254,.90) 48%,rgba(232,239,254,.55) 100%),
                   url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(21px,2.2vw,28px);font-weight:700;letter-spacing:-.01em;max-width:22ch;}
.cta-band p{margin-top:10px;font-size:15px;color:var(--text-2);max-width:44ch;}

/* ---------- footer ---------- */
.site-footer{margin-top:auto;background:var(--surface);border-top:1px solid var(--line);padding-top:56px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand strong{font-size:16px;font-weight:700;letter-spacing:-.01em;}
.site-footer p{font-size:14px;color:var(--text-2);max-width:34ch;}
.site-footer h4{font-size:14px;font-weight:600;color:var(--text);margin-bottom:16px;}
.site-footer li{margin-bottom:10px;font-size:14px;color:var(--text-2);}
.site-footer li a{color:var(--text-2);}
.site-footer li a:hover{color:var(--primary);text-decoration:underline;}
.footer-bottom{
  border-top:1px solid var(--line);padding:18px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:18px;}
.footer-bottom .links a{color:var(--text-3);}
.footer-bottom .links a:hover{color:var(--primary);text-decoration:underline;}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .side-nav{width:var(--nav-w-sm);padding:22px 10px 18px;align-items:center;}
  .brand{padding:0 0 20px;}
  .brand-text{display:none;}
  .nav{width:100%;align-items:center;}
  .nav-item{justify-content:center;padding:0;gap:0;}
  .nav-item.is-active::before{top:8px;bottom:8px;}
  .nav-label{display:none;}
  .side-cta{width:44px;height:44px;padding:0;border-radius:50%;}
  .side-cta span{display:none;}
  .shell-body{margin-left:var(--nav-w-sm);}
  .container{padding:0 28px;}
  .tier-grid{grid-template-columns:repeat(2,1fr);}
  .timeline{grid-template-columns:repeat(2,1fr);gap:28px;}
  .timeline::before{display:none;}
}
@media (max-width:991px){
  .side-nav{display:none;}
  .topbar{display:flex;}
  .shell-body{margin-left:0;}
  .cat-hero{padding:36px 0 60px;}
  .cat-hero__grid{grid-template-columns:1fr;gap:40px;}
  .hero-visual{max-width:560px;}
  .hero-float{left:14px;bottom:-20px;}
  .progress-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .section{padding:60px 0;}
  .section--tight{padding:44px 0;}
  .cta-band{padding:40px 32px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .tier-grid{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr;gap:26px;}
  .timeline::before{
    display:block;top:8px;bottom:8px;left:21px;right:auto;width:2px;height:auto;
    background:linear-gradient(180deg,rgba(42,91,215,.42) 0%,rgba(255,122,69,.42) 100%);
  }
  .step{padding-left:64px;}
  .step-num{position:absolute;left:0;top:0;}
  .step h3{margin-top:8px;}
  .section{padding:48px 0;}
  .section--tight{padding:40px 0;}
  .section-head{margin-bottom:28px;}
  .accordion .accordion-title{padding:17px 54px 17px 18px;font-size:15.5px;}
  .accordion .accordion-title::before{right:18px;}
  .accordion .accordion-content{padding:16px 18px 20px;}
  .cta-band{padding:32px 22px;border-radius:var(--radius);}
  .panel{padding:22px;}
  .hero-float{left:10px;bottom:-18px;padding:12px 16px;}
  .hero-float .num{font-size:19px;}
}
@media (max-width:575px){
  .container{padding:0 16px;}
  .footer-grid{grid-template-columns:1fr;}
  .btn{width:100%;justify-content:center;}
  .btn-row{flex-direction:column;align-items:stretch;}
  .btn-quiet{width:auto;}
  .btn-row .btn-quiet{width:100%;justify-content:center;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}
#tiers,#stages,#faq{scroll-margin-top:92px;}

/* roulang page: category4 */
:root{
  --primary:#2A5BD7;
  --primary-deep:#1B3F9E;
  --primary-soft:#E8EFFE;
  --accent:#FF7A45;
  --accent-soft:#FFF1E9;
  --teal:#12B5A5;
  --bg:#F5F8FC;
  --surface:#FFFFFF;
  --ink:#121A2B;
  --ink-2:#4A5568;
  --ink-3:#8A94A6;
  --line:#E3E9F2;
  --hair:rgba(18,26,43,.08);
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --sh:0 1px 2px rgba(18,26,43,.04),0 6px 18px rgba(42,91,215,.06);
  --sh-hover:0 8px 28px rgba(42,91,215,.14);
  --ease:cubic-bezier(.2,.6,.3,1);
  --side:224px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",Inter,ui-sans-serif,system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--primary);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--primary-deep)}
ul,ol{list-style:none;margin:0;padding:0}
button{font-family:inherit;border:0;background:none;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.35;color:var(--ink)}
p{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}

/* ---------- 容器 ---------- */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}

/* ---------- 左侧导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;
  width:var(--side);
  height:100vh;
  background:var(--surface);
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  padding:22px 16px 20px;
  z-index:60;
}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:24px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:11px;
  background:linear-gradient(140deg,var(--primary),var(--primary-deep));
  color:#fff;font-weight:800;font-size:17px;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:15px;font-weight:700;letter-spacing:-.01em}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--ink-3);letter-spacing:.16em}
.nav{display:flex;flex-direction:column;gap:4px}
.nav-item{
  display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;border-radius:10px;
  color:var(--ink-2);font-size:14.5px;font-weight:500;
  position:relative;
  border-left:3px solid transparent;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.nav-item:hover{background:var(--primary-soft);color:var(--primary-deep)}
.nav-item.is-active{background:var(--primary-soft);color:var(--primary-deep);font-weight:600;border-left-color:var(--primary)}
.nav-ico{width:22px;height:22px;flex:0 0 22px;display:flex;align-items:center;justify-content:center}
.nav-ico svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.sidebar-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}
.sidebar-note{margin-top:10px;font-size:12px;color:var(--ink-3);line-height:1.7}
.nav-toggle{
  display:none;
  width:42px;height:42px;border-radius:10px;
  align-items:center;justify-content:center;
  color:var(--ink);border:1px solid var(--line);background:var(--surface);
}
.nav-toggle svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.nav-mask{display:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--r-btn);
  font-size:14.5px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:var(--primary);color:#fff;border-radius:999px;box-shadow:0 6px 16px rgba(42,91,215,.22)}
.btn-primary:hover{background:#3163e0;color:#fff;box-shadow:0 8px 22px rgba(42,91,215,.3)}
.btn-primary:active{transform:translateY(1px)}
.btn-accent{background:var(--accent);color:#fff;border-radius:999px;box-shadow:0 6px 16px rgba(255,122,69,.24)}
.btn-accent:hover{background:#ff8a5b;color:#fff;box-shadow:0 8px 22px rgba(255,122,69,.3)}
.btn-ghost{background:var(--surface);color:var(--primary);border-color:var(--line)}
.btn-ghost:hover{border-color:rgba(42,91,215,.4);color:var(--primary-deep);background:#fff}
.btn-ghost:active{transform:translateY(1px)}
.btn-block{width:100%}
.btn-arrow::after{content:"→";font-size:14px;transition:transform .18s var(--ease)}
.btn-arrow:hover::after{transform:translateX(3px)}

/* ---------- 主内容偏移 ---------- */
.main-wrap{margin-left:var(--side);min-height:100vh;display:flex;flex-direction:column}
.main-wrap main{flex:1}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:26px 0 0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:#C3CBD8}
.breadcrumb a{color:var(--ink-2)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb [aria-current="page"]{color:var(--ink-3)}

/* ---------- Hero ---------- */
.cat-hero{
  position:relative;
  margin-top:22px;
  border-radius:20px;
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--surface);
  box-shadow:var(--sh);
}
.cat-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(circle at 84% 18%,rgba(42,91,215,.10),transparent 56%),radial-gradient(circle at 8% 92%,rgba(255,122,69,.08),transparent 48%);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:40px;
  align-items:center;
  padding:52px 48px;
}
.hero-tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 12px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary-deep);
  font-size:12.5px;font-weight:600;
}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--primary);display:block}
.hero-copy h1{
  font-size:clamp(28px,3.4vw,44px);
  margin:16px 0 14px;
}
.hero-lead{
  font-size:15.5px;color:var(--ink-2);
  max-width:34em;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;
}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 13px;border-radius:999px;
  background:#fff;border:1px solid var(--line);
  font-size:12.5px;color:var(--ink-2);
}
.pill b{color:var(--primary-deep);font-weight:700;font-variant-numeric:tabular-nums}
.hero-figure{position:relative}
.hero-figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-img);
  box-shadow:0 14px 34px rgba(18,26,43,.14);
  background:#EDF1F8;
}
.hero-badge{
  position:absolute;left:-14px;bottom:-16px;
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:12px 16px;box-shadow:var(--sh);
  min-width:150px;
}
.hero-badge span{display:block;font-size:11.5px;color:var(--ink-3);letter-spacing:.08em}
.hero-badge strong{display:block;font-size:20px;font-weight:800;color:var(--primary-deep);font-variant-numeric:tabular-nums}

/* ---------- 板块通用 ---------- */
.section{padding:76px 0 0}
.section-head{max-width:720px;margin-bottom:34px}
.section-head h2{font-size:clamp(22px,2.4vw,32px)}
.section-head p{margin-top:12px;color:var(--ink-2);font-size:15.5px}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:700;
  letter-spacing:.14em;color:var(--primary);margin-bottom:12px;text-transform:uppercase;
}

/* ---------- 快捷入口卡 ---------- */
.quick-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
.quick-card{
  display:flex;flex-direction:column;gap:10px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh);
  color:var(--ink);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.quick-card:hover{
  transform:translateY(-2px);
  border-color:rgba(42,91,215,.35);
  box-shadow:var(--sh-hover);
  color:var(--ink);
}
.quick-ico{
  width:44px;height:44px;border-radius:12px;
  background:var(--primary-soft);color:var(--primary-deep);
  display:flex;align-items:center;justify-content:center;
}
.quick-ico svg{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.quick-card h3{font-size:17.5px;font-weight:600}
.quick-card p{font-size:14px;color:var(--ink-2);line-height:1.75}
.quick-more{font-size:13.5px;font-weight:600;color:var(--primary);margin-top:auto}
.quick-card:hover .quick-more{color:var(--primary-deep)}

/* ---------- FAQ 分组 ---------- */
.faq-group{margin-bottom:34px}
.faq-group-head{
  display:flex;align-items:center;gap:12px;margin-bottom:16px;
}
.faq-group-head span{
  width:30px;height:30px;border-radius:9px;flex:0 0 30px;
  background:var(--primary-soft);color:var(--primary-deep);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:800;font-variant-numeric:tabular-nums;
}
.faq-group-head h3{font-size:18.5px}
.faq-group-head em{font-style:normal;font-size:13px;color:var(--ink-3);margin-left:auto}

/* Foundation Accordion 覆盖 */
.accordion{background:transparent;border:0;margin:0;list-style:none}
.accordion-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  margin-bottom:12px;
  overflow:hidden;
  box-shadow:var(--sh);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.accordion-item:hover{border-color:rgba(42,91,215,.28)}
.accordion-item.is-active{border-color:rgba(42,91,215,.4);box-shadow:0 6px 22px rgba(42,91,215,.1)}
.accordion-title{
  display:block;position:relative;
  padding:18px 58px 18px 22px;
  font-size:16px;font-weight:600;line-height:1.6;
  color:var(--ink);
  border-bottom:0 !important;
  background:transparent;
}
.accordion-title::before{content:none !important}
.accordion-title:hover{color:var(--primary)}
.accordion-item.is-active .accordion-title{color:var(--primary-deep)}
.faq-icon{
  position:absolute;right:22px;top:50%;
  width:14px;height:14px;margin-top:-7px;
  transition:transform .22s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:0;top:6px;
  width:14px;height:2px;border-radius:2px;background:var(--ink-3);
  transition:background .2s var(--ease);
}
.faq-icon::after{transform:rotate(90deg)}
.accordion-title:hover .faq-icon::before,
.accordion-title:hover .faq-icon::after{background:var(--primary)}
.accordion-item.is-active .faq-icon{transform:rotate(45deg)}
.accordion-item.is-active .faq-icon::before,
.accordion-item.is-active .faq-icon::after{background:var(--primary)}
.accordion-content{
  display:none;
  padding:0 22px 20px;
  border-bottom:0 !important;
  background:transparent;
  font-size:15px;color:var(--ink-2);line-height:1.8;
}
.accordion-content.is-active{display:block}
.accordion-content p+p{margin-top:10px}
.accordion-content strong{color:var(--ink);font-weight:600}
.accordion-content .tip-list{margin-top:10px;display:flex;flex-direction:column;gap:7px}
.accordion-content .tip-list li{position:relative;padding-left:16px;font-size:14.5px}
.accordion-content .tip-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:6px;height:6px;border-radius:50%;background:var(--primary);
}

/* ---------- 处理路径 ---------- */
.flow-list{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  counter-reset:flow;
}
.flow-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 22px;box-shadow:var(--sh);position:relative;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.flow-item:hover{transform:translateY(-2px);border-color:rgba(42,91,215,.3);box-shadow:var(--sh-hover)}
.flow-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  background:var(--primary-soft);color:var(--primary-deep);
  font-size:13.5px;font-weight:800;font-variant-numeric:tabular-nums;
  margin-bottom:14px;
}
.flow-item h3{font-size:16.5px;font-weight:600;margin-bottom:8px}
.flow-item p{font-size:14px;color:var(--ink-2);line-height:1.75}
.flow-connector{display:none}

/* ---------- 支持信息条 ---------- */
.support-strip{
  margin-top:20px;
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
}
.support-item{background:var(--surface);padding:22px 24px}
.support-item span{display:block;font-size:12.5px;color:var(--ink-3);letter-spacing:.06em}
.support-item strong{display:block;margin-top:6px;font-size:15.5px;font-weight:700;color:var(--ink)}
.support-item em{font-style:normal;display:block;margin-top:4px;font-size:13.5px;color:var(--ink-2)}

/* ---------- CTA 带 ---------- */
.cta-band{
  margin-top:88px;
  background:linear-gradient(120deg,#EEF3FE,#F7F9FE 60%,#FFF3EC);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(circle at 88% 24%,rgba(255,122,69,.12),transparent 52%),radial-gradient(circle at 12% 78%,rgba(42,91,215,.12),transparent 50%);
  pointer-events:none;
}
.cta-inner{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:60px 32px;
}
.cta-inner h2{font-size:clamp(22px,2.4vw,30px)}
.cta-inner p{margin-top:12px;color:var(--ink-2);font-size:15.5px;max-width:38em}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#0F1729;
  color:#B9C3D6;
  margin-top:0;
  padding:60px 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px;
  padding-bottom:44px;
}
.site-footer h4{
  color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;letter-spacing:0;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-mark{background:linear-gradient(140deg,#3D6EE8,#1B3F9E)}
.footer-brand strong{color:#fff;font-size:15.5px}
.site-footer p{font-size:13.5px;line-height:1.8;color:#93A0B8;max-width:30em}
.site-footer ul{display:flex;flex-direction:column;gap:10px}
.site-footer ul li{font-size:13.5px;color:#93A0B8}
.site-footer ul a{color:#C6D0E2;font-size:13.5px}
.site-footer ul a:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13px;color:#8A94A6;
}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:18px}
.footer-bottom a{color:#C6D0E2}
.footer-bottom a:hover{color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  :root{--side:76px}
  .site-header{padding:18px 10px}
  .brand-text,.nav-label,.sidebar-foot,.sidebar-note{display:none}
  .brand{justify-content:center;width:100%}
  .nav-item{justify-content:center;padding:0;border-left-width:3px}
  .nav-item.is-active{background:var(--primary-soft)}
}
@media (max-width:991px){
  :root{--side:0px}
  .site-header{
    position:sticky;top:0;left:0;
    width:100%;height:62px;
    flex-direction:row;align-items:center;
    padding:0 16px;
    border-right:0;border-bottom:1px solid var(--line);
    box-shadow:0 2px 12px rgba(18,26,43,.05);
    z-index:70;
  }
  .brand-row{width:100%;margin:0;justify-content:space-between}
  .brand-text{display:flex}
  .nav-toggle{display:flex}
  .nav{
    position:fixed;top:62px;left:0;
    width:280px;height:calc(100vh - 62px);
    background:var(--surface);
    padding:16px 14px;
    gap:6px;
    transform:translateX(-102%);
    transition:transform .24s var(--ease);
    box-shadow:14px 0 34px rgba(18,26,43,.14);
    z-index:75;overflow-y:auto;
  }
  .nav-label{display:inline}
  .nav-item{justify-content:flex-start;padding:0 12px;height:46px}
  body.nav-open .nav{transform:translateX(0)}
  body.nav-open .nav-mask{display:block}
  .nav-mask{
    position:fixed;inset:0;top:62px;
    background:rgba(18,26,43,.45);
    z-index:65;
  }
  .sidebar-foot{display:none}
  .main-wrap{margin-left:0}
  .container{padding:0 24px}
  .hero-grid{grid-template-columns:1fr;gap:30px;padding:40px 32px}
  .hero-figure{order:-1}
  .hero-badge{left:auto;right:14px;bottom:-14px}
  .quick-grid{grid-template-columns:1fr;gap:16px}
  .flow-list{grid-template-columns:repeat(2,1fr)}
  .support-strip{grid-template-columns:1fr}
  .section{padding:56px 0 0}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:48px 24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:575px){
  .container{padding:0 16px}
  body{font-size:15.5px}
  .hero-grid{padding:32px 20px}
  .cat-hero{border-radius:16px}
  .hero-badge{position:static;margin-top:16px;display:inline-block}
  .flow-list{grid-template-columns:1fr}
  .cta-inner{padding:40px 16px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .accordion-title{padding:16px 52px 16px 18px;font-size:15px}
  .accordion-content{padding:0 18px 18px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}