/* roulang page: index */
:root{
  --brand:#4326C9;
  --brand-600:#3A20B3;
  --dark:#161228;
  --teal:#12C2A8;
  --hot:#FF6A2B;
  --hot-600:#E85A1D;
  --ink:#1A1626;
  --muted:#5A5570;
  --soft:#8B87A0;
  --line:#E6E3DC;
  --bg:#F7F6F3;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(20,18,40,.06), 0 8px 24px rgba(20,18,40,.06);
  --sh-2:0 12px 32px rgba(20,18,40,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}

/* 容器 */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}
@media (max-width:1023px){.container{padding:0 24px}}
@media (max-width:639px){.container{padding:0 16px}}

/* 左侧 App Shell */
.app-sidebar{
  position:fixed;top:0;left:0;bottom:0;width:236px;z-index:60;
  background:var(--dark);display:flex;flex-direction:column;
  padding:22px 16px 18px;overflow-y:auto;
}
.app-sidebar::-webkit-scrollbar{width:6px}
.app-sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:6px}
.sidebar-brand{display:flex;align-items:center;gap:10px;padding:4px 8px 18px;border-bottom:1px solid rgba(255,255,255,.1)}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  background:linear-gradient(135deg,#4326C9 0%,#12C2A8 100%);
  display:flex;align-items:center;justify-content:center;color:#fff;
}
.logo-text{color:#fff;font-size:17px;font-weight:600;letter-spacing:.02em;white-space:nowrap}
.nav-group-title{font-size:12px;letter-spacing:.08em;color:#7C77A0;font-weight:600;margin:20px 12px 8px}
.nav-link{
  display:flex;align-items:center;gap:10px;height:44px;padding:0 12px;border-radius:10px;
  color:#B9B4D0;font-size:15px;position:relative;
  transition:background .2s ease-out,color .2s ease-out;
}
.nav-link svg{flex:none}
.nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-link.active{background:rgba(67,38,201,.28);color:#fff;box-shadow:inset 3px 0 0 0 var(--brand)}
.sidebar-foot{margin-top:auto;padding-top:20px;border-top:1px solid rgba(255,255,255,.1)}
.sidebar-foot .btn-hot{width:100%}
.sidebar-note{font-size:12px;color:#7C77A0;margin:12px 4px 0;line-height:1.7}

/* 主内容偏移 */
.main-wrap{padding-left:236px}
@media (max-width:1023px){.main-wrap{padding-left:0}}

/* 移动端顶栏与抽屉 */
.mobile-bar{
  position:sticky;top:0;z-index:50;height:56px;background:#fff;
  border-bottom:1px solid var(--line);display:flex;align-items:center;
  justify-content:space-between;padding:0 12px;
}
@media (min-width:1024px){.mobile-bar{display:none}}
.icon-btn{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  border-radius:10px;border:0;background:transparent;color:var(--ink);cursor:pointer;
  transition:background .2s ease;
}
.icon-btn:hover{background:#F0EEE8}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:280px;background:var(--dark);z-index:80;
  transform:translateX(-100%);transition:transform .26s ease-out;overflow-y:auto;padding:20px 16px;
}
.drawer.open{transform:translateX(0)}
.drawer .nav-link{height:48px}
.drawer-overlay{
  position:fixed;inset:0;background:rgba(22,18,40,.55);z-index:70;
  opacity:0;visibility:hidden;transition:opacity .26s ease-out,visibility .26s ease-out;
}
.drawer-overlay.open{opacity:1;visibility:visible}

/* 倒计时条 */
.countdown-bar{background:var(--dark);color:#fff;position:relative;overflow:hidden}
.bar-inner{
  display:flex;align-items:center;gap:20px;flex-wrap:wrap;
  min-height:56px;padding-top:9px;padding-bottom:9px;position:relative;z-index:2;
}
.bar-label{font-size:14px;color:#E8E5F5;white-space:nowrap}
.cd-group{display:flex;align-items:stretch;gap:6px}
.cd-cell{
  min-width:46px;padding:4px 6px 5px;border-radius:8px;text-align:center;
  background:rgba(255,255,255,.1);
}
.cd-num{
  display:block;font-family:"DIN Alternate","Barlow",ui-monospace,monospace;
  font-variant-numeric:tabular-nums;font-size:20px;font-weight:700;
  line-height:1.15;color:var(--teal);
}
.cd-unit{display:block;font-style:normal;font-size:11px;color:rgba(255,255,255,.65);line-height:1.3}
.cd-sep{color:rgba(255,255,255,.4);align-self:center;font-size:18px;line-height:1}
.bar-cta{
  margin-left:auto;display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 16px;
  border-radius:8px;background:var(--hot);color:#fff;font-size:14px;font-weight:600;
  transition:background .2s ease-out,transform .2s ease-out;
}
.bar-cta:hover{background:var(--hot-600);transform:translateY(-1px)}
.countdown-bar.is-over{background:#EFEDE8;color:var(--ink);border-bottom:1px solid var(--line)}
.countdown-bar.is-over .bar-label{color:var(--muted)}
.countdown-bar.is-over .cd-cell{background:#fff;border:1px solid var(--line)}
.countdown-bar.is-over .cd-num{color:var(--soft)}
.countdown-bar.is-over .cd-unit{color:var(--soft)}
@media (max-width:639px){
  .bar-label{font-size:13px}
  .cd-cell{min-width:40px}
  .cd-num{font-size:17px}
}

/* 通用板块 */
.section{padding:88px 0}
@media (max-width:1023px){.section{padding:64px 0}}
@media (max-width:639px){.section{padding:52px 0}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.h2{font-size:28px;position:relative;padding-left:16px;font-weight:700}
.h2::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:2px;
  background:var(--brand);
}
@media (max-width:639px){.h2{font-size:22px}}
.section-desc{color:var(--muted);font-size:16px;max-width:660px;margin-top:12px}
.eyebrow{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;
  color:var(--brand);letter-spacing:.04em;margin-bottom:14px;
}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:10px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out;
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-600);box-shadow:var(--sh-2)}
.btn-hot{background:var(--hot);color:#fff}
.btn-hot:hover{background:var(--hot-600);box-shadow:var(--sh-2)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:#fff}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:8px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px}
.btn-link:hover{text-decoration:underline;text-underline-offset:3px}

/* Hero */
.hero{position:relative;overflow:hidden;min-height:520px;display:flex;align-items:center}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-mask{
  position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(22,18,40,.9) 0%,rgba(67,38,201,.74) 46%,rgba(22,18,40,.66) 100%);
}
.grid-tex{
  position:absolute;inset:0;pointer-events:none;opacity:.07;
  background-image:linear-gradient(#fff 1px,transparent 1px),linear-gradient(90deg,#fff 1px,transparent 1px);
  background-size:64px 64px;
}
.hero-inner{position:relative;z-index:2;width:100%;padding:76px 0}
.hero h1{
  color:#fff;font-size:clamp(28px,4.1vw,42px);line-height:1.24;font-weight:700;
  max-width:15em;margin-bottom:18px;
}
.hero-lead{color:#E8E5F5;font-size:18px;max-width:600px;margin-bottom:30px}
@media (max-width:639px){.hero-lead{font-size:16px}}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.stat-row{display:flex;flex-wrap:wrap;gap:30px;margin-top:36px}
.stat-num{
  font-family:"DIN Alternate","Barlow",ui-monospace,monospace;font-variant-numeric:tabular-nums;
  font-size:26px;font-weight:700;color:var(--teal);line-height:1.1;
}
.stat-label{font-size:13px;color:rgba(255,255,255,.7);margin-top:4px}
.hero-float{border-radius:var(--r-lg);overflow:hidden;box-shadow:0 24px 56px rgba(0,0,0,.42);border:1px solid rgba(255,255,255,.16)}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 12px;border-radius:6px;
  background:rgba(18,194,168,.18);border:1px solid rgba(18,194,168,.45);
  color:#7FE6D6;font-size:13px;font-weight:600;margin-bottom:20px;
}

/* 卖点列表 */
.sell-list{border-bottom:1px solid var(--line)}
.sell-item{
  display:grid;grid-template-columns:auto 1fr;gap:26px;align-items:start;
  padding:30px 0;border-top:1px solid var(--line);
}
.sell-item.wide{grid-column:span 2}
.sell-num{
  font-family:"DIN Alternate","Barlow",ui-monospace,monospace;font-size:40px;font-weight:700;
  line-height:1;color:transparent;-webkit-text-stroke:1.5px var(--brand);letter-spacing:.02em;
}
.sell-title{font-size:18px;font-weight:700;margin-bottom:8px}
.sell-desc{font-size:15px;color:var(--muted);max-width:640px}
.sell-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 48px}
@media (max-width:900px){
  .sell-grid{grid-template-columns:1fr}
  .sell-item.wide{grid-column:auto}
}
@media (max-width:520px){
  .sell-item{gap:18px;padding:24px 0}
  .sell-num{font-size:32px}
}

/* 图墙 */
.wall{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}
.wall-item{position:relative;border-radius:14px;overflow:hidden;display:block}
.wall-item img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
.wall-item::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,rgba(22,18,40,.6),rgba(22,18,40,0) 58%);
  transition:background .3s ease-out;
}
.wall-item:hover img{transform:scale(1.03)}
.wall-item:hover::after{background:linear-gradient(to top,rgba(22,18,40,.78),rgba(22,18,40,.1) 62%)}
.wall-tag{
  position:absolute;top:12px;left:12px;z-index:2;background:var(--teal);color:#fff;
  font-size:12px;font-weight:600;padding:4px 10px;border-radius:6px;
}
.wall-cap{
  position:absolute;left:16px;right:16px;bottom:14px;z-index:2;color:#fff;
  font-size:15px;font-weight:600;line-height:1.5;
}
.wall-arrow{
  position:absolute;right:14px;bottom:14px;z-index:2;color:#fff;opacity:0;transform:translateX(-6px);
  transition:opacity .25s ease-out,transform .25s ease-out;
}
.wall-item:hover .wall-arrow{opacity:1;transform:translateX(0)}
.w1{grid-column:span 6}
.w2{grid-column:span 3}
.w3{grid-column:span 4}
.tall{height:286px}
.short{height:204px}
@media (max-width:900px){
  .w1{grid-column:span 12}
  .w2{grid-column:span 6}
  .w3{grid-column:span 6}
  .tall{height:240px}
  .short{height:190px}
}
@media (max-width:639px){
  .wall{grid-template-columns:repeat(2,1fr);gap:12px}
  .w1,.w2,.w3{grid-column:span 2}
  .tall,.short{height:172px}
}

/* 卡片 */
.card{
  background:#fff;border-radius:var(--r-md);border:1px solid var(--line);overflow:hidden;
  display:flex;flex-direction:column;height:100%;
  transition:transform .22s ease-out,box-shadow .22s ease-out,border-color .22s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D8D3FF}
.card:hover .card-title{color:var(--brand)}
.card-thumb{aspect-ratio:16/10;overflow:hidden;background:#EFEDE8}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.card:hover .card-thumb img{transform:scale(1.03)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{
  font-size:17px;font-weight:600;line-height:1.5;transition:color .2s ease-out;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-desc{
  font-size:14px;color:var(--muted);line-height:1.72;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--soft);border-top:1px solid #F0EEE8;padding-top:12px;
}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:6px;
  font-size:12px;font-weight:600;background:#E4F7F4;color:#0E8A79;width:fit-content;
}
.badge-hot{background:#FFEDE4;color:#D2541C}
.badge-brand{background:#F0EDFB;color:var(--brand)}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:999px;
  background:#F0EEE8;color:var(--muted);font-size:14px;
  transition:background .2s ease-out,color .2s ease-out;
}
.chip:hover{background:#E8E4FF;color:var(--brand)}

/* 空态 */
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:60px 20px;border:1px dashed var(--line);border-radius:var(--r-md);
  background:#fff;color:var(--soft);text-align:center;
}
.empty-state svg{color:#C9C5D6}

/* 数据与反馈 */
.evidence-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:28px}
@media (max-width:900px){.evidence-grid{grid-template-columns:1fr}}
.evidence-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px;box-shadow:var(--sh-1);
}
.evidence-num{
  font-family:"DIN Alternate","Barlow",ui-monospace,monospace;font-variant-numeric:tabular-nums;
  font-size:32px;font-weight:700;color:var(--brand);line-height:1.1;
}
.evidence-label{font-size:13px;color:var(--soft);margin-top:6px}
.quote{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:24px;
  display:flex;flex-direction:column;gap:14px;height:100%;
  transition:box-shadow .22s ease-out,transform .22s ease-out,border-color .22s ease-out;
}
.quote:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#D8D3FF}
.quote-text{font-size:15px;color:var(--muted);line-height:1.8}
.quote-who{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--soft);margin-top:auto}

/* CTA 面板与表单 */
.cta-panel{
  position:relative;overflow:hidden;background:var(--dark);border-radius:var(--r-lg);
  padding:56px;color:#fff;
}
@media (max-width:900px){.cta-panel{padding:36px 24px}}
.cta-item{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:#DDD9F0;margin-top:14px}
.cta-item svg{flex:none;margin-top:6px;color:var(--teal)}
.form-card{
  background:#fff;border-radius:var(--r-lg);padding:28px;color:var(--ink);
  box-shadow:0 18px 44px rgba(0,0,0,.3);
}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;height:46px;border:1px solid var(--line);border-radius:var(--r-sm);
  padding:0 14px;background:#fff;font-size:15px;color:var(--ink);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.field textarea{height:auto;min-height:92px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(67,38,201,.14);
}
.field.error input,.field.error select{border-color:#F04438;box-shadow:0 0 0 3px rgba(240,68,56,.12)}
.field-err{display:none;font-size:12px;color:#F04438;margin-top:6px}
.field.error .field-err{display:block}
.form-help{font-size:12px;color:var(--soft);margin-top:12px;line-height:1.7}
.success-panel{
  display:none;flex-direction:column;align-items:center;gap:12px;text-align:center;
  border:1px solid #B9ECE1;background:#F2FCFA;border-radius:var(--r-md);padding:34px 20px;
}
.success-panel.show{display:flex}
.success-panel svg{color:#12B76A}

/* FAQ */
.faq-wrap{max-width:860px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item.open{border-color:#D8D3FF;box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;min-height:56px;
  padding:14px 20px;background:transparent;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--ink);
}
.faq-idx{
  flex:none;width:26px;height:26px;border-radius:6px;background:#E4F7F4;color:#0E8A79;
  font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.faq-arrow{margin-left:auto;flex:none;color:var(--soft);transition:transform .26s ease-out}
.faq-item.open .faq-arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out}
.faq-a-inner{padding:0 20px 20px 60px;font-size:15px;color:var(--muted);line-height:1.85}
@media (max-width:520px){
  .faq-q{font-size:15px;padding:14px 16px}
  .faq-a-inner{padding:0 16px 18px 56px}
}

/* 关联入口 */
.link-cards{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media (max-width:700px){.link-cards{grid-template-columns:1fr}}
.link-card{
  display:flex;align-items:center;gap:16px;padding:24px;border:1px solid var(--line);
  border-radius:var(--r-md);background:#fff;
  transition:border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.link-card:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--sh-1)}
.link-card-icon{
  width:44px;height:44px;border-radius:10px;background:#F0EDFB;color:var(--brand);
  display:flex;align-items:center;justify-content:center;flex:none;
}

/* 页脚 */
.site-footer{background:var(--dark);color:#B9B4D0;padding:64px 0 0;position:relative;overflow:hidden}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:520px){.footer-grid{grid-template-columns:1fr}}
.footer-title{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-link{display:block;font-size:14px;color:#B9B4D0;padding:9px 0;transition:color .2s ease-out}
.footer-link:hover{color:#fff}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;font-size:13px;color:#7C77A0;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.social-row{display:flex;gap:10px;margin-top:18px}
.social-btn{
  width:38px;height:38px;border-radius:10px;background:rgba(255,255,255,.07);
  display:flex;align-items:center;justify-content:center;color:#B9B4D0;
  transition:background .2s ease-out,color .2s ease-out;
}
.social-btn:hover{background:rgba(67,38,201,.5);color:#fff}

/* 回到顶部 */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:999px;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh-1);
  display:flex;align-items:center;justify-content:center;color:var(--brand);
  opacity:0;visibility:hidden;transform:translateY(8px);z-index:40;
  transition:opacity .25s ease-out,transform .25s ease-out,visibility .25s ease-out;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}

@media (prefers-reduced-motion:reduce){
  *{transition-duration:.001ms !important;animation-duration:.001ms !important}
  html{scroll-behavior:auto}
  .card:hover,.btn:hover,.link-card:hover,.quote:hover{transform:none}
  .card:hover .card-thumb img,.wall-item:hover img{transform:none}
}

/* roulang page: article */
:root{
  --brand:#4326C9;
  --brand-deep:#3320A0;
  --brand-lite:#7C6BF5;
  --ink:#161228;
  --jade:#12C2A8;
  --jade-ink:#0B8F7C;
  --hot:#FF6A2B;
  --bg:#F7F6F3;
  --text:#1A1626;
  --text-2:#5A5570;
  --text-3:#8B87A0;
  --line:#E6E3DC;
  --line-dark:rgba(255,255,255,.12);
  --paper-soft:#F0EDFB;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(20,18,40,.06),0 8px 24px rgba(20,18,40,.06);
  --sh-2:0 12px 32px rgba(20,18,40,.12);
  --font-cn:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  --font-num:"DIN Alternate","Barlow",ui-monospace,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media (min-width:768px){.container{padding:0 24px}}
@media (min-width:1024px){.container{padding:0 40px}}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* 侧栏导航 */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:236px;
  background:var(--ink);
  border-right:1px solid rgba(255,255,255,.06);
  padding:22px 14px 18px;
  display:none;flex-direction:column;
  overflow-y:auto;z-index:50;
}
@media (min-width:1024px){.sidebar{display:flex}}
.sidebar-brand{display:flex;align-items:center;gap:10px;padding:0 8px 8px}
.logo-mark{
  width:32px;height:32px;border-radius:9px;flex:0 0 auto;
  background:linear-gradient(135deg,#4326C9,#12C2A8);
  display:flex;align-items:center;justify-content:center;color:#fff;
}
.logo-text{font-size:17px;font-weight:600;color:#fff;letter-spacing:.01em}
.sidebar-nav{display:flex;flex-direction:column;gap:2px;flex:1;margin-top:8px}
.nav-group-title{
  font-size:12px;letter-spacing:.08em;color:#7C77A0;
  font-weight:600;margin:18px 14px 8px;
}
.sidebar-nav .nav-group-title:first-child{margin-top:6px}
.nav-link{
  position:relative;display:flex;align-items:center;gap:10px;
  min-height:44px;padding:10px 14px;border-radius:10px;
  font-size:15px;color:#B9B4D0;
  transition:background .2s ease-out,color .2s ease-out;
}
.nav-link svg{flex:0 0 auto}
.nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-link.active{background:rgba(67,38,201,.28);color:#fff}
.nav-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand-lite);
}
.side-cta{
  display:block;margin-top:16px;padding:11px 12px;text-align:center;
  border:1px solid var(--hot);border-radius:var(--r-sm);
  color:#FF9A6B;font-size:14px;transition:background .2s,color .2s;
}
.side-cta:hover{background:rgba(255,106,43,.14);color:#FFC0A0}
.side-meta{font-size:12px;color:#7C77A0;text-align:center;margin:14px 0 0}

/* 移动顶栏与抽屉 */
.mobile-bar{
  position:sticky;top:0;z-index:40;
  display:flex;align-items:center;gap:10px;
  height:56px;padding:0 12px;
  background:#fff;border-bottom:1px solid var(--line);
}
@media (min-width:1024px){.mobile-bar{display:none}}
.icon-btn{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  border:none;background:transparent;border-radius:10px;color:var(--ink);
  transition:background .2s;
}
.icon-btn:hover{background:#F2F0FA}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:280px;
  background:var(--ink);z-index:70;
  padding:18px 14px;overflow-y:auto;
  display:flex;flex-direction:column;
  transform:translateX(-100%);
  transition:transform .24s ease-out;
}
.drawer.open{transform:translateX(0)}
.drawer-overlay{
  position:fixed;inset:0;background:rgba(22,18,40,.55);
  opacity:0;pointer-events:none;transition:opacity .24s;z-index:65;
}
.drawer-overlay.open{opacity:1;pointer-events:auto}
body.drawer-open{overflow:hidden}

.main-area{min-height:60vh}
@media (min-width:1024px){.main-area{padding-left:236px}}
.section{padding:44px 0}
@media (min-width:1024px){.section{padding:64px 0}}

/* 面包屑 */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  font-size:13px;color:var(--text-3);padding:26px 0 18px;
}
.crumb a{color:var(--text-2);transition:color .18s}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#C4C0D2}

/* 文章头 */
.post-head{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh-1);
}
@media (min-width:768px){.post-head{padding:40px}}
.post-title{
  font-size:28px;line-height:1.25;font-weight:700;color:var(--ink);
  margin:14px 0 0;letter-spacing:.005em;
}
@media (min-width:1024px){.post-title{font-size:40px}}
.post-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-top:20px;padding-top:18px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.badge{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:6px;font-size:13px;font-weight:600;
  background:#E4F8F4;color:var(--jade-ink);
}
.post-lead{font-size:16px;color:var(--text-2);margin:16px 0 0;line-height:1.85}
@media (min-width:1024px){.post-lead{font-size:18px}}

/* 正文阅读区 */
.read-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--sh-1);
}
@media (min-width:768px){.read-card{padding:40px}}
.article-body{max-width:740px;font-size:17px;line-height:1.85;color:var(--text)}
.article-body>*:first-child{margin-top:0}
.article-body h2{
  font-size:22px;line-height:1.35;font-weight:700;color:var(--ink);
  margin:40px 0 16px;padding-left:14px;border-left:4px solid var(--brand);
  scroll-margin-top:80px;
}
@media (min-width:768px){.article-body h2{font-size:24px}}
.article-body h3{font-size:19px;line-height:1.4;font-weight:700;color:var(--ink);margin:30px 0 12px;scroll-margin-top:80px}
.article-body p{margin:0 0 1.1em}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.25em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:.4em 0}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{
  background:var(--paper-soft);border-left:4px solid var(--brand);
  padding:20px 22px;border-radius:0 var(--r-md) var(--r-md) 0;
  margin:24px 0;color:var(--text-2);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-md);margin:24px 0}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:#F3F1FC;color:var(--ink);font-weight:600}
.article-body tr:nth-child(even) td{background:#FBFAF8}
.article-body pre{
  background:var(--ink);color:#E8E5F5;border-radius:var(--r-sm);
  padding:18px 20px;overflow-x:auto;font-size:14px;line-height:1.7;
  margin:24px 0;font-family:var(--font-num);
}
.article-body code{font-family:var(--font-num);font-size:.92em}
.article-body :not(pre)>code{background:var(--paper-soft);color:var(--brand);padding:2px 6px;border-radius:6px}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-deep)}
.article-body hr{border:none;border-top:1px solid var(--line);margin:32px 0}

/* 侧栏卡 */
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--sh-1);
}
.side-card-title{
  font-size:14px;font-weight:700;color:var(--ink);
  margin:0 0 14px;padding-left:10px;border-left:3px solid var(--brand);line-height:1.4;
}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;padding:8px 10px;border-radius:8px;
  font-size:14px;line-height:1.6;color:var(--text-2);
  transition:background .18s,color .18s;
}
.toc-list a:hover{background:#F3F1FC;color:var(--brand)}
.toc-empty{font-size:14px;color:var(--text-3);margin:0}

/* 互动区 */
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.tag{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;
  background:#F1EFF8;color:var(--text-2);font-size:13px;
  transition:background .18s,color .18s;
}
.tag:hover{background:var(--paper-soft);color:var(--brand)}
.action-row{display:flex;flex-wrap:wrap;gap:12px}
.action-btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#fff;color:var(--text-2);
  font-size:14px;transition:border-color .2s,color .2s,background .2s,transform .2s;
}
.action-btn:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.action-btn.on{background:var(--brand);border-color:var(--brand);color:#fff}
.action-btn .count{font-family:var(--font-num)}

/* 章节标题 */
.block-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px}
.block-title{font-size:22px;font-weight:700;color:var(--ink);margin:0;line-height:1.4}
@media (min-width:768px){.block-title{font-size:28px}}
.block-sub{font-size:15px;color:var(--text-2);margin:10px 0 0}
.more-link{font-size:14px;color:var(--brand);display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.more-link:hover{text-decoration:underline;text-underline-offset:4px}

/* 入口卡 */
.link-card{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;transition:transform .22s ease-out,box-shadow .22s ease-out,border-color .22s;
}
.link-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D9D4F3}
.link-card .thumb{aspect-ratio:16/10;overflow:hidden}
.link-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .24s ease-out}
.link-card:hover .thumb img{transform:scale(1.03)}
.link-card .lc-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.link-card h3{font-size:17px;font-weight:700;color:var(--ink);margin:0;line-height:1.5;transition:color .2s}
.link-card:hover h3{color:var(--brand)}
.link-card p{font-size:14px;color:var(--text-2);margin:0;line-height:1.8}
.link-card .lc-foot{margin-top:auto;font-size:13px;color:var(--brand);display:flex;align-items:center;gap:6px}

/* 按钮 */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--r-sm);border:1px solid transparent;
  background:var(--brand);color:#fff;font-size:15px;font-weight:600;
  transition:background .2s,transform .2s,box-shadow .2s;
}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:0 10px 24px rgba(67,38,201,.28)}
.btn-outline{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--r-sm);
  background:#fff;border:1px solid var(--line);color:var(--ink);font-size:15px;font-weight:600;
  transition:border-color .2s,color .2s,transform .2s;
}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}

/* 空态 */
.empty-state{
  text-align:center;padding:56px 20px;border:1px dashed var(--line);
  border-radius:var(--r-lg);background:#FBFAF8;max-width:620px;margin:0 auto;
}
.empty-state svg{color:var(--text-3);margin:0 auto}
.empty-title{font-size:19px;font-weight:700;color:var(--ink);margin:18px 0 8px}
.empty-desc{font-size:15px;color:var(--text-2);margin:0 0 22px;line-height:1.8}

/* 返回顶部 */
.to-top{
  position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:999px;
  background:var(--ink);color:#fff;border:none;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;pointer-events:none;transform:translateY(8px);
  transition:opacity .22s,transform .22s;z-index:45;
}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
.to-top:hover{background:var(--brand)}

/* 页脚 */
.site-footer{position:relative;overflow:hidden;background:var(--ink);color:#E8E5F5;margin-top:64px;padding:64px 0 0}
.grid-tex{
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:48px 48px;
}
.relative{position:relative}
.z-10{z-index:10}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr}}
.footer-title{font-size:13px;letter-spacing:.08em;color:#8F8AB0;font-weight:600;margin:0 0 12px}
.footer-link{
  display:flex;align-items:center;min-height:44px;font-size:14px;color:#B9B4D0;
  transition:color .2s;
}
.footer-link:hover{color:#fff}
.footer-text{font-size:14px;color:#B9B4D0;margin:6px 0 0;line-height:1.8}
.social-row{display:flex;gap:10px;margin-top:18px}
.social-btn{
  width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line-dark);color:#B9B4D0;transition:background .2s,color .2s,border-color .2s;
}
.social-btn:hover{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.28)}
.footer-bottom{
  margin-top:44px;border-top:1px solid var(--line-dark);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#8F8AB0;
}
.footer-bottom .num{color:#A29CC4}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .link-card:hover{transform:none}
  .link-card:hover .thumb img{transform:none}
}

/* roulang page: category1 */
:root{
  --brand:#4326C9;
  --brand-deep:#3A20B4;
  --teal:#12C2A8;
  --teal-deep:#0E8E7C;
  --heat:#FF6A2B;
  --bg:#F7F6F3;
  --dark:#161228;
  --ink:#1A1626;
  --ink-2:#5A5570;
  --ink-3:#8B87A0;
  --line:#E6E3DC;
  --line-dark:rgba(255,255,255,.12);
  --ok:#12B76A;
  --warn:#F04438;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(20,18,40,.06), 0 8px 24px rgba(20,18,40,.06);
  --sh-2:0 12px 32px rgba(20,18,40,.12);
  --side-w:236px;
  --nav-text:#B9B4D0;
  --nav-muted:#7C77A0;
  --enable:#E8E5F5;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease-out}
button,input,select,textarea{font:inherit;color:inherit}
button{border:0;background:none;cursor:pointer}
h1,h2,h3,h4,p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.num{font-family:"DIN Alternate","Barlow",ui-monospace,monospace;font-variant-numeric:tabular-nums}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}

/* ============ 侧栏导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);
  background:var(--dark);
  display:flex;flex-direction:column;
  padding:22px 14px 18px;
  z-index:70;
  overflow-y:auto;
}
.sidebar .brand{display:flex;align-items:center;gap:10px;padding:0 6px 20px;border-bottom:1px solid var(--line-dark)}
.logo-mark{
  width:32px;height:32px;border-radius:9px;flex:0 0 auto;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--teal));
  color:#fff;
}
.logo-text{font-size:17px;font-weight:600;color:#fff;letter-spacing:.02em}
.sidebar nav{flex:1;padding-top:6px}
.nav-group-title{font-size:12px;letter-spacing:.08em;color:var(--nav-muted);font-weight:600;margin:18px 10px 8px}
.nav-link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  min-height:44px;padding:0 12px;border-radius:var(--r-sm);
  color:var(--nav-text);font-size:15px;
  transition:background .2s ease-out,color .2s ease-out;
}
.nav-link svg{flex:0 0 auto}
.nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-link.active{background:rgba(67,38,201,.28);color:#fff}
.nav-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.side-foot{margin-top:18px;padding-top:16px;border-top:1px solid var(--line-dark)}
.side-cta{
  display:flex;align-items:center;justify-content:center;
  height:46px;border:1px solid var(--heat);border-radius:var(--r-sm);
  color:var(--heat);font-size:15px;font-weight:600;
  transition:background .2s ease-out,color .2s ease-out;
}
.side-cta:hover{background:rgba(255,106,43,.12);color:#FF8656}
.side-meta{font-size:12px;color:var(--nav-muted);margin-top:12px;text-align:center;line-height:1.7}

/* ============ 移动端顶栏 ============ */
.topbar{
  position:sticky;top:0;z-index:55;
  display:none;align-items:center;gap:8px;
  height:56px;padding:0 12px 0 8px;
  background:#fff;border-bottom:1px solid var(--line);
}
.burger{
  width:44px;height:44px;border-radius:var(--r-sm);
  display:grid;place-items:center;color:var(--ink);
  transition:background .2s ease-out;
}
.burger:hover{background:var(--bg)}
.topbar .brand-mini{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:600}
.topbar .brand-mini .logo-mark{width:26px;height:26px;border-radius:8px}
.topbar .top-cta{
  margin-left:auto;width:44px;height:44px;border-radius:var(--r-sm);
  display:grid;place-items:center;color:var(--brand);
  border:1px solid var(--line);
}
.topbar .top-cta:hover{border-color:var(--brand);background:rgba(67,38,201,.05)}

.overlay{
  position:fixed;inset:0;background:rgba(22,18,40,.55);
  opacity:0;visibility:hidden;z-index:65;
  transition:opacity .22s ease-out,visibility .22s ease-out;
}
.overlay.show{opacity:1;visibility:visible}

/* ============ 主区域 ============ */
.app-main{padding-left:var(--side-w)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);padding-top:28px}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#C4C0B8}

/* Hero */
.hero-block{padding:30px 0 4px}
.hero-title{font-size:40px;line-height:1.25;font-weight:700;letter-spacing:-.01em;margin-top:16px}
.hero-sub{font-size:18px;line-height:1.75;color:var(--ink-2);margin-top:16px;max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-figure{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);border:1px solid var(--line)}
.hero-figure img{width:100%;aspect-ratio:16/11;object-fit:cover}
.stat-chip{
  position:absolute;display:inline-flex;align-items:center;gap:8px;
  background:#fff;border-radius:var(--r-sm);
  padding:10px 14px;font-size:13px;font-weight:600;color:var(--ink);
  box-shadow:var(--sh-1);
}
.stat-chip.tl{top:18px;left:18px}
.stat-chip.br{bottom:18px;right:18px}
.stat-chip i{width:8px;height:8px;border-radius:50%;background:var(--teal);display:inline-block;font-style:normal}

.stat-strip{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  margin-top:44px;
}
.stat-strip > div{background:#fff;padding:20px 22px}
.stat-strip b{display:block;font-size:26px;line-height:1.2;color:var(--brand)}
.stat-strip span{font-size:13.5px;color:var(--ink-3)}

/* 通用板块 */
.section{padding:72px 0 0}
.section-head{margin-bottom:30px;max-width:840px}
.eyebrow{font-size:12.5px;letter-spacing:.08em;color:var(--teal-deep);font-weight:600}
.h2{font-size:28px;line-height:1.3;font-weight:700;margin-top:10px;border-left:4px solid var(--brand);padding-left:14px}
.lead{font-size:17px;line-height:1.9;color:var(--ink-2);margin-top:18px;max-width:740px}

/* 要点列表 */
.point-list{border-top:1px solid var(--line);margin-top:28px}
.point-row{
  display:grid;grid-template-columns:88px minmax(0,1fr);gap:24px;
  padding:26px 0;border-bottom:1px solid var(--line);
}
.point-num{
  font-size:38px;line-height:1;font-weight:700;
  color:transparent;-webkit-text-stroke:1.4px var(--brand);
}
.point-row h3{font-size:18px;font-weight:600}
.point-row p{font-size:15px;line-height:1.85;color:var(--ink-2);margin-top:8px;max-width:46em}

/* 卡片 */
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.post-card{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D8D4CA}
.post-card .thumb{aspect-ratio:16/10;overflow:hidden;background:#EFEDE8}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .24s ease-out}
.post-card:hover .thumb img{transform:scale(1.03)}
.post-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{
  font-size:17px;font-weight:600;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .2s ease-out;
}
.post-card:hover h3{color:var(--brand)}
.post-body p{
  font-size:14.5px;line-height:1.8;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
  border-top:1px solid var(--line);padding-top:12px;
}
.arrow-ico{transition:transform .2s ease-out}
.post-card:hover .arrow-ico{transform:translateX(3px);color:var(--brand)}

.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;
  border-radius:6px;font-size:12.5px;font-weight:600;
  background:rgba(18,194,168,.14);color:var(--teal-deep);
}
.chip{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;
  border-radius:999px;font-size:13.5px;
  background:#fff;border:1px solid var(--line);color:var(--ink-2);
}
.chip:hover{border-color:var(--brand);color:var(--brand)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);box-shadow:0 8px 20px rgba(67,38,201,.26)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--sh-1)}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14.5px;font-weight:600}
.btn-text:hover{text-decoration:underline;text-underline-offset:3px}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:860px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:border-color .2s ease-out,box-shadow .2s ease-out}
.faq-item.open{border-color:#CFC9F0;box-shadow:var(--sh-1)}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;gap:14px;
  padding:12px 20px;text-align:left;font-size:16px;font-weight:600;
  transition:color .2s ease-out;
}
.faq-q:hover{color:var(--brand)}
.faq-mark{
  flex:0 0 auto;width:28px;height:28px;border-radius:8px;
  display:grid;place-items:center;font-size:13px;font-weight:700;
  background:rgba(18,194,168,.14);color:var(--teal-deep);
}
.faq-caret{margin-left:auto;flex:0 0 auto;color:var(--ink-3);transition:transform .24s ease-out,color .24s ease-out}
.faq-item.open .faq-caret{transform:rotate(180deg);color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease-out}
.faq-a-inner{padding:0 20px 22px 62px;font-size:15.5px;line-height:1.85;color:var(--ink-2)}

/* 关联入口卡 */
.link-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.link-card{
  display:flex;align-items:flex-start;gap:16px;
  padding:24px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-md);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.link-card:hover{transform:translateY(-2px);border-color:var(--brand);box-shadow:var(--sh-1)}
.link-card .ic{
  flex:0 0 auto;width:42px;height:42px;border-radius:var(--r-sm);
  display:grid;place-items:center;
  background:rgba(67,38,201,.08);color:var(--brand);
}
.link-card h3{font-size:17px;font-weight:600}
.link-card p{font-size:14.5px;line-height:1.8;color:var(--ink-2);margin-top:6px}
.link-card .go{margin-left:auto;color:var(--ink-3);flex:0 0 auto;transition:transform .2s ease-out,color .2s ease-out}
.link-card:hover .go{transform:translateX(3px);color:var(--brand)}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:45;
  width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;
  background:#fff;border:1px solid var(--line);color:var(--brand);
  box-shadow:var(--sh-1);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .22s ease-out,transform .22s ease-out,visibility .22s ease-out;
}
.to-top.show{opacity:1;visibility:visible;transform:none}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;overflow:hidden;
  background:var(--dark);color:var(--enable);
  padding:64px 0 26px;margin-top:80px;
}
.grid-tex{
  position:absolute;inset:0;pointer-events:none;opacity:.08;
  background-image:linear-gradient(to right,#fff 1px,transparent 1px),linear-gradient(to bottom,#fff 1px,transparent 1px);
  background-size:64px 64px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px}
.footer-title{font-size:13px;letter-spacing:.08em;color:var(--nav-muted);font-weight:600;margin-bottom:14px}
.footer-link{display:flex;align-items:center;min-height:44px;font-size:14.5px;color:var(--nav-text)}
.footer-link:hover{color:#fff}
.footer-text{font-size:14px;line-height:1.8;color:var(--nav-text);display:flex;align-items:center;min-height:44px}
.social-row{display:flex;gap:10px;margin-top:20px}
.social-btn{
  width:40px;height:40px;border-radius:var(--r-sm);
  border:1px solid var(--line-dark);color:var(--nav-text);
  display:grid;place-items:center;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.social-btn:hover{color:#fff;border-color:rgba(255,255,255,.35);background:rgba(255,255,255,.06)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:var(--nav-muted);
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .app-main{padding-left:0}
  .topbar{display:flex}
  .sidebar{
    width:280px;
    transform:translateX(-100%);
    transition:transform .26s ease-out;
  }
  .sidebar.open{transform:none;box-shadow:0 0 40px rgba(0,0,0,.35)}
  .sidebar .nav-link{min-height:48px;font-size:15.5px}
  .hero-title{font-size:32px}
  .section{padding:56px 0 0}
}
@media (max-width:768px){
  .container{padding:0 24px}
  .hero-title{font-size:28px}
  .hero-sub{font-size:16px}
  .h2{font-size:22px}
  .card-grid{grid-template-columns:1fr}
  .link-cards{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr}
  .point-row{grid-template-columns:1fr;gap:10px;padding:22px 0}
  .point-num{font-size:30px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .site-footer{padding:48px 0 22px;margin-top:56px}
  .faq-a-inner{padding-left:20px}
  .stat-chip.tl{top:12px;left:12px}
  .stat-chip.br{bottom:12px;right:12px}
}
@media (max-width:560px){
  .container{padding:0 16px}
  .footer-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.001ms !important;animation-duration:.001ms !important}
  .post-card:hover,.link-card:hover,.btn:hover{transform:none !important}
  .post-card:hover .thumb img{transform:none !important}
}

/* roulang page: category2 */
:root{
  --brand:#4326C9;
  --brand-soft:#F0EDFB;
  --aqua:#12C2A8;
  --aqua-soft:#E4F8F5;
  --heat:#FF6A2B;
  --ink:#161228;
  --paper:#F7F6F3;
  --text:#1A1626;
  --text-2:#5A5570;
  --text-3:#8B87A0;
  --line:#E6E3DC;
  --line-dark:rgba(255,255,255,.12);
  --white:#FFFFFF;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --r-xs:6px;
  --sh-1:0 1px 2px rgba(20,18,40,.06), 0 8px 24px rgba(20,18,40,.06);
  --sh-2:0 12px 32px rgba(20,18,40,.12);
  --sidebar-w:236px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}

/* ============ 侧栏 App Shell ============ */
.app-sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--ink);z-index:80;
  display:flex;flex-direction:column;
  padding:24px 16px 20px;
  overflow-y:auto;
  transform:translateX(-100%);
  transition:transform .24s ease-out;
}
.app-sidebar.open{transform:translateX(0)}
.sidebar-brand{display:flex;align-items:center;gap:10px;padding:0 8px 22px}
.logo-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand),#6C4BFF);
  color:#fff;
}
.logo-text{font-size:17px;font-weight:600;color:#fff;letter-spacing:.02em}
.nav-group-title{
  font-size:12px;letter-spacing:.08em;color:#7C77A0;
  padding:16px 10px 8px;margin:0;
}
.nav-link{
  display:flex;align-items:center;gap:12px;
  height:44px;padding:0 10px;border-radius:var(--r-sm);
  font-size:15px;color:#B9B4D0;
  position:relative;
  transition:background .2s ease-out,color .2s ease-out;
}
.nav-link svg{flex:0 0 20px;opacity:.9}
.nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-link.active{
  background:rgba(67,38,201,.28);color:#fff;
}
.nav-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.sidebar-foot{margin-top:auto;padding:22px 8px 0;border-top:1px solid var(--line-dark)}
.btn-outline-heat{
  display:flex;align-items:center;justify-content:center;
  height:44px;border-radius:var(--r-sm);border:1px solid rgba(255,106,43,.64);
  color:#FF8B57;font-size:14px;font-weight:600;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.btn-outline-heat:hover{background:rgba(255,106,43,.14);border-color:var(--heat);color:#fff}
.sidebar-meta{margin-top:14px;font-size:12px;line-height:1.7;color:#7C77A0}

/* ============ 移动顶栏 & 抽屉 ============ */
.mobile-topbar{
  position:sticky;top:0;z-index:70;
  height:56px;display:flex;align-items:center;gap:10px;
  padding:0 12px;background:#fff;border-bottom:1px solid var(--line);
}
.burger{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-sm);color:var(--ink);
}
.burger:hover{background:var(--brand-soft)}
.mobile-brand{display:flex;align-items:center;gap:8px;font-weight:600;font-size:16px}
.mobile-cta{
  margin-left:auto;height:36px;padding:0 14px;border-radius:var(--r-sm);
  background:var(--heat);color:#fff;font-size:13px;font-weight:600;
  display:inline-flex;align-items:center;
}
.overlay{
  position:fixed;inset:0;background:rgba(22,18,40,.55);
  z-index:75;opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s;
}
.overlay.show{opacity:1;visibility:visible}

/* ============ 主区 ============ */
.main-area{padding-bottom:0}
.page-body{padding:28px 0 0}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:20px;
}
.breadcrumb a{color:var(--text-3);transition:color .2s ease-out}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C4C0D2}

/* Hero 宽幅图位 */
.cat-hero{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  min-height:320px;display:flex;align-items:flex-end;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  box-shadow:var(--sh-1);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(67,38,201,.78) 0%,rgba(22,18,40,.62) 62%,rgba(22,18,40,.5) 100%);
}
.cat-hero-inner{position:relative;z-index:2;padding:44px 40px;max-width:840px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;font-weight:600;
  color:#D9F5F0;background:rgba(18,194,168,.24);
  border:1px solid rgba(18,194,168,.4);
  padding:5px 12px;border-radius:var(--r-xs);margin-bottom:16px;
}
.cat-hero h1{
  font-size:40px;line-height:1.25;font-weight:700;color:#fff;
}
.cat-hero .sub{
  margin-top:14px;font-size:18px;line-height:1.7;color:#E8E5F5;max-width:34em;
}

/* 通用板块 */
.section{padding:56px 0}
.section-tight{padding:40px 0}
.section-title{
  font-size:28px;line-height:1.3;font-weight:700;color:var(--text);
  padding-left:16px;position:relative;
}
.section-title::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;
  border-radius:2px;background:var(--brand);
}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:28px}
.section-desc{margin-top:12px;font-size:17px;color:var(--text-2);max-width:46em}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#DAD5F0}

/* 说明 + 要点 */
.intro-grid{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:start}
.intro-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px;box-shadow:var(--sh-1);
}
.intro-card p{font-size:17px;line-height:1.85;color:var(--text-2);max-width:40em}
.intro-card p + p{margin-top:1.1em}
.point-list{margin-top:8px}
.point-item{
  display:flex;gap:14px;padding:16px 0;border-top:1px solid var(--line);
}
.point-item:first-child{border-top:0;padding-top:0}
.point-icon{
  flex:0 0 30px;width:30px;height:30px;border-radius:var(--r-xs);
  background:var(--aqua-soft);color:#0E8F7D;
  display:inline-flex;align-items:center;justify-content:center;
}
.point-item h3{font-size:17px;font-weight:600;line-height:1.5}
.point-item p{font-size:15px;color:var(--text-2);margin-top:4px;line-height:1.75}

/* 时间轴 */
.timeline{position:relative;margin-top:8px}
.tl-item{
  position:relative;display:grid;grid-template-columns:56px 1fr;gap:20px;
  padding-bottom:34px;
}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:27px;top:46px;bottom:6px;width:1px;background:var(--line);
}
.tl-item:last-child::before{display:none}
.tl-num{
  width:56px;height:56px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);
  font-family:"DIN Alternate","Barlow",ui-monospace,monospace;
  font-variant-numeric:tabular-nums;
  font-size:20px;font-weight:700;color:var(--brand);
  box-shadow:var(--sh-1);
}
.tl-body{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 24px;box-shadow:var(--sh-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.tl-body:hover{transform:translateX(2px);box-shadow:var(--sh-2)}
.tl-body h3{font-size:20px;font-weight:600;line-height:1.5}
.tl-body p{margin-top:8px;font-size:16px;color:var(--text-2);max-width:42em}
.tl-tag{
  display:inline-block;margin-top:12px;
  font-size:13px;color:#0E8F7D;background:var(--aqua-soft);
  padding:3px 10px;border-radius:var(--r-xs);
}

/* 2×2 图文卡 */
.grid-2x2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.media-card{overflow:hidden;display:flex;flex-direction:column}
.media-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:#EDEBF3}
.media-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .24s ease-out}
.media-card:hover .media-thumb img{transform:scale(1.03)}
.media-badge{
  position:absolute;left:12px;top:12px;
  font-size:12px;font-weight:600;color:#0E8F7D;
  background:rgba(228,248,245,.94);
  padding:4px 10px;border-radius:var(--r-xs);
}
.media-body{padding:22px;flex:1;display:flex;flex-direction:column}
.media-body h3{font-size:20px;font-weight:600;line-height:1.5;transition:color .2s ease-out}
.media-card:hover .media-body h3{color:var(--brand)}
.media-body p{margin-top:10px;font-size:15px;color:var(--text-2);line-height:1.8}
.meta-row{
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;gap:10px;
  font-size:13px;color:var(--text-3);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#C9C5D8}

/* 关联入口 chip */
.chip-bar{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px 28px;box-shadow:var(--sh-1);
}
.chip-bar .chip-label{font-size:15px;font-weight:600;color:var(--text);margin-right:6px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 18px;border-radius:999px;
  border:1px solid var(--line);background:#fff;
  font-size:14px;color:var(--text-2);
  transition:border-color .2s ease-out,color .2s ease-out,background .2s ease-out;
}
.chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.chip-primary{background:var(--brand);border-color:var(--brand);color:#fff}
.chip-primary:hover{background:#3620A8;color:#fff}

/* FAQ */
.faq-wrap{max-width:860px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-1);
  transition:border-color .2s ease-out;
}
.faq-item.open{border-color:#CFC7F2}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;
  min-height:56px;padding:12px 20px 12px 16px;text-align:left;
  font-size:17px;font-weight:600;color:var(--text);
}
.faq-num{
  flex:0 0 30px;width:30px;height:30px;border-radius:var(--r-xs);
  background:var(--aqua-soft);color:#0E8F7D;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;
}
.faq-caret{margin-left:auto;flex:0 0 20px;color:var(--text-3);transition:transform .24s ease-out}
.faq-item.open .faq-caret{transform:rotate(180deg);color:var(--brand)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .3s ease-out;
}
.faq-item.open .faq-a{max-height:420px}
.faq-a-inner{
  padding:0 20px 20px 60px;font-size:16px;line-height:1.85;color:var(--text-2);
}

/* CTA 描边区 */
.cta-panel{
  border:1px solid #D7D0F3;background:#fff;border-radius:var(--r-lg);
  padding:40px;display:grid;grid-template-columns:1.1fr .9fr;gap:32px;
  align-items:center;box-shadow:var(--sh-1);
  position:relative;overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;
  border-radius:50%;background:var(--brand-soft);opacity:.7;
}
.cta-panel h2{font-size:28px;font-weight:700;line-height:1.3;position:relative}
.cta-panel p{margin-top:14px;font-size:16px;color:var(--text-2);max-width:34em;position:relative}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .2s ease-out,background .2s ease-out,border-color .2s ease-out,color .2s ease-out,box-shadow .2s ease-out;
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--brand);color:#fff;border:1px solid var(--brand)}
.btn-primary:hover{background:#3620A8;border-color:#3620A8;box-shadow:0 8px 20px rgba(67,38,201,.24)}
.btn-ghost{border:1px solid var(--line);background:#fff;color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;
  background:#fff;border:1px solid var(--line);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);z-index:60;
  opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s;
}
.to-top.show{opacity:1;visibility:visible}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;margin-top:72px;background:var(--ink);color:#B9B4D0;
  padding:64px 0 28px;overflow:hidden;
}
.site-footer .grid-tex{
  position:absolute;inset:0;opacity:.06;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.9) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:36px 36px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px}
.footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.footer-link{
  display:block;font-size:14px;color:#B9B4D0;line-height:44px;
  transition:color .2s ease-out;
}
.footer-link:hover{color:#fff}
.footer-info{font-size:14px;line-height:1.85;color:#B9B4D0}
.footer-info + .footer-info{margin-top:8px}
.social-row{display:flex;gap:10px;margin-top:18px}
.social-btn{
  width:38px;height:38px;border-radius:var(--r-sm);
  border:1px solid var(--line-dark);color:#B9B4D0;
  display:inline-flex;align-items:center;justify-content:center;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.social-btn:hover{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.28)}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:#8B87A0;
}

/* ============ 响应式 ============ */
@media (min-width:1024px){
  .app-sidebar{transform:none}
  .overlay{display:none}
  .main-area{margin-left:var(--sidebar-w)}
  .mobile-topbar{display:none}
}
@media (max-width:1023px){
  .main-area{padding-top:0}
  .container{padding:0 24px}
  .cat-hero h1{font-size:32px}
  .intro-grid{grid-template-columns:1fr;gap:28px}
  .cta-panel{grid-template-columns:1fr;padding:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 16px}
  .page-body{padding-top:20px}
  .section{padding:44px 0}
  .cat-hero{min-height:280px}
  .cat-hero-inner{padding:28px 20px}
  .cat-hero h1{font-size:28px}
  .cat-hero .sub{font-size:16px}
  .section-title{font-size:22px}
  .grid-2x2{grid-template-columns:1fr;gap:18px}
  .tl-item{grid-template-columns:44px 1fr;gap:14px}
  .tl-num{width:44px;height:44px;font-size:17px}
  .tl-item::before{left:21px;top:38px}
  .tl-body{padding:18px}
  .faq-a-inner{padding-left:20px}
  .intro-card{padding:22px}
  .chip-bar{padding:18px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-link{line-height:44px}
  .to-top{right:16px;bottom:16px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .card:hover,.tl-body:hover,.btn:hover{transform:none}
  .media-card:hover .media-thumb img{transform:none}
}

/* roulang page: category3 */
:root{
    --brand:#4326C9;
    --brand-dark:#351da6;
    --brand-soft:#F0EDFB;
    --aqua:#12C2A8;
    --aqua-deep:#0B8F7C;
    --heat:#FF6A2B;
    --heat-dark:#e85a1e;
    --bg:#F7F6F3;
    --ink:#1A1626;
    --ink-2:#5A5570;
    --ink-3:#8B87A0;
    --line:#E6E3DC;
    --deep:#161228;
    --deep-line:rgba(255,255,255,.12);
    --ok:#12B76A;
    --warn:#F04438;
    --r-lg:16px;
    --r-md:12px;
    --r-sm:10px;
    --shadow-1:0 1px 2px rgba(20,18,40,.06),0 8px 24px rgba(20,18,40,.06);
    --shadow-2:0 12px 32px rgba(20,18,40,.12);
    --shell:236px;
    --font-cn:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
    --font-num:"DIN Alternate","Barlow",ui-monospace,SFMono-Regular,Menlo,monospace;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:var(--font-cn);
    font-size:16px;
    line-height:1.85;
    letter-spacing:.01em;
  }
  body.lock{overflow:hidden}
  img{max-width:100%;display:block;height:auto}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit;font-size:inherit}
  h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;color:var(--ink)}
  p{margin:0}
  ul,ol{margin:0;padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}

  .container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
  @media (min-width:768px){.container{padding-left:24px;padding-right:24px}}
  @media (min-width:1024px){.container{padding-left:40px;padding-right:40px}}

  /* ---------- 左侧导航栏 ---------- */
  .shell{
    position:fixed;top:0;left:0;bottom:0;width:var(--shell);
    background:var(--deep);
    display:flex;flex-direction:column;
    padding:22px 16px 18px;
    z-index:70;
    transform:translateX(-100%);
    transition:transform .24s ease-out;
    overflow-y:auto;
  }
  .shell.open{transform:none}
  .brand{display:flex;align-items:center;gap:10px;padding:0 6px 6px}
  .logo-mark{
    width:34px;height:34px;border-radius:10px;
    background:linear-gradient(140deg,var(--brand),#6b4bff);
    color:#fff;display:inline-flex;align-items:center;justify-content:center;
    flex:0 0 auto;
  }
  .logo-text{font-size:17px;font-weight:600;color:#fff;letter-spacing:.02em}
  .nav-group-title{
    font-size:12px;letter-spacing:.08em;color:#7C77A0;
    margin:22px 10px 8px;text-transform:none;
  }
  .nav-link{
    position:relative;
    display:flex;align-items:center;gap:10px;
    min-height:44px;padding:0 12px;margin-bottom:2px;
    border-radius:var(--r-sm);
    color:#B9B4D0;font-size:15px;line-height:1.4;
    transition:background .2s ease-out,color .2s ease-out;
  }
  .nav-link svg{flex:0 0 auto}
  .nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
  .nav-link.active{background:rgba(67,38,201,.28);color:#fff;font-weight:600}
  .nav-link.active::before{
    content:"";position:absolute;left:-16px;top:50%;transform:translateY(-50%);
    width:3px;height:22px;border-radius:0 3px 3px 0;background:var(--brand);
  }
  .shell-bottom{margin-top:auto;padding-top:24px}
  .shell-cta{
    display:flex;align-items:center;justify-content:center;
    height:46px;border-radius:var(--r-sm);
    border:1px solid var(--heat);color:#FFD8C6;
    font-size:14px;font-weight:600;
    transition:background .2s ease-out,color .2s ease-out,transform .2s ease-out;
  }
  .shell-cta:hover{background:rgba(255,106,43,.14);color:#fff;transform:translateY(-1px)}
  .shell-meta{font-size:12px;color:#7C77A0;line-height:1.7;margin-top:12px;padding:0 4px}

  /* ---------- 移动端顶栏与抽屉 ---------- */
  .mobile-bar{
    position:sticky;top:0;z-index:50;
    height:56px;display:flex;align-items:center;gap:8px;
    padding:0 8px;background:#fff;border-bottom:1px solid var(--line);
  }
  .hamburger{
    width:44px;height:44px;border:0;background:transparent;border-radius:var(--r-sm);
    display:inline-flex;align-items:center;justify-content:center;color:var(--ink);cursor:pointer;
    transition:background .2s ease-out;
  }
  .hamburger:hover{background:var(--brand-soft)}
  .mobile-brand{
    flex:1;display:flex;align-items:center;gap:8px;
    font-size:16px;font-weight:600;color:var(--ink);
  }
  .mobile-brand .logo-mark{width:28px;height:28px;border-radius:8px}
  .mobile-brand .logo-text{font-size:16px;color:var(--ink)}
  .icon-btn{
    width:44px;height:44px;border-radius:var(--r-sm);
    display:inline-flex;align-items:center;justify-content:center;
    color:var(--brand);background:var(--brand-soft);
    transition:background .2s ease-out;
  }
  .icon-btn:hover{background:#e5e0fa}

  .scrim{
    position:fixed;inset:0;background:rgba(22,18,40,.55);
    opacity:0;pointer-events:none;transition:opacity .24s ease-out;z-index:65;
  }
  .scrim.show{opacity:1;pointer-events:auto}
  .drawer{
    position:fixed;top:0;left:0;bottom:0;width:280px;max-width:86vw;
    background:var(--deep);z-index:72;padding:18px 16px;
    transform:translateX(-100%);transition:transform .24s ease-out;
    display:flex;flex-direction:column;overflow-y:auto;
  }
  .drawer.open{transform:none}
  .drawer-head{display:flex;align-items:center;gap:10px;padding-bottom:8px}
  .drawer-close{
    margin-left:auto;width:40px;height:40px;border:0;border-radius:var(--r-sm);
    background:rgba(255,255,255,.08);color:#fff;font-size:22px;line-height:1;cursor:pointer;
    transition:background .2s ease-out;
  }
  .drawer-close:hover{background:rgba(255,255,255,.16)}
  .drawer .nav-link{min-height:48px}

  @media (min-width:1024px){
    body{padding-left:var(--shell)}
    .shell{transform:none}
    .mobile-bar{display:none}
    .drawer,.scrim{display:none}
  }

  /* ---------- 通用组件 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:46px;padding:0 24px;border-radius:var(--r-sm);
    font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
    transition:transform .2s ease-out,background .2s ease-out,color .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .btn:hover{transform:translateY(-2px)}
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(67,38,201,.22)}
  .btn-primary:hover{background:var(--brand-dark)}
  .btn-accent{background:var(--heat);color:#fff;box-shadow:0 6px 16px rgba(255,106,43,.25)}
  .btn-accent:hover{background:var(--heat-dark)}
  .btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
  .btn-outline:hover{border-color:var(--brand);color:var(--brand)}
  .btn:disabled{opacity:.45;cursor:not-allowed;transform:none}

  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--brand);
    margin-bottom:12px;
  }
  .eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--aqua)}

  .sec-title{font-size:22px}
  @media (min-width:768px){.sec-title{font-size:28px}}
  .sec-sub{color:var(--ink-2);font-size:16px;margin-top:12px;max-width:44em}
  .badge{
    display:inline-flex;align-items:center;height:24px;padding:0 9px;
    border-radius:6px;font-size:12px;font-weight:600;
    background:rgba(18,194,168,.13);color:var(--aqua-deep);
  }
  .badge-heat{background:rgba(255,106,43,.14);color:#C84512}
  .num{font-family:var(--font-num);font-variant-numeric:tabular-nums}
  .text-link{
    display:inline-flex;align-items:center;gap:6px;
    color:var(--brand);font-size:14px;font-weight:600;
    transition:gap .2s ease-out;
  }
  .text-link:hover{gap:10px}
  .text-link:hover span{text-decoration:underline;text-underline-offset:3px}

  /* ---------- 页面标题带 ---------- */
  .page-head{
    position:relative;background:#fff;border-bottom:1px solid var(--line);
    padding:28px 0 44px;overflow:hidden;
  }
  .grid-tex-light{
    position:absolute;inset:0;pointer-events:none;opacity:.06;
    background-image:linear-gradient(var(--brand) 1px,transparent 1px),linear-gradient(90deg,var(--brand) 1px,transparent 1px);
    background-size:48px 48px;
  }
  .crumbs{
    display:flex;align-items:center;gap:8px;flex-wrap:wrap;
    font-size:13px;color:var(--ink-3);position:relative;z-index:2;
  }
  .crumbs a{color:var(--ink-3);transition:color .2s ease-out}
  .crumbs a:hover{color:var(--brand)}
  .crumbs [aria-current="page"]{color:var(--ink-2)}
  .head-inner{
    position:relative;z-index:2;margin-top:26px;
    border-left:4px solid var(--brand);
    padding-left:18px;
  }
  @media (min-width:768px){.head-inner{padding-left:28px}}
  .page-title{font-size:28px;max-width:20em}
  @media (min-width:768px){.page-title{font-size:40px}}
  .page-lead{color:var(--ink-2);font-size:16px;line-height:1.9;margin-top:16px;max-width:740px}
  @media (min-width:768px){.page-lead{font-size:18px}}
  .head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
  .head-facts{
    display:flex;flex-wrap:wrap;gap:12px 32px;margin-top:28px;
    padding-top:20px;border-top:1px solid var(--line);
  }
  .head-facts span{font-size:14px;color:var(--ink-2);display:inline-flex;align-items:baseline;gap:8px}
  .head-facts strong{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:22px;color:var(--aqua-deep)}

  /* ---------- 板块 ---------- */
  .section{padding:56px 0}
  @media (min-width:1024px){.section{padding:88px 0}}
  .section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

  /* ---------- 图片卡 ---------- */
  .figure-card{
    position:relative;border-radius:var(--r-lg);overflow:hidden;
    box-shadow:var(--shadow-1);background:#fff;
  }
  .figure-card img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .24s ease-out}
  .figure-card:hover img{transform:scale(1.03)}
  .figure-tag{
    position:absolute;top:14px;left:14px;
    display:inline-flex;align-items:center;height:26px;padding:0 10px;
    border-radius:6px;font-size:12px;font-weight:600;
    background:var(--heat);color:#fff;box-shadow:0 6px 14px rgba(20,18,40,.18);
  }
  .figure-tag.tag-aqua{top:auto;bottom:14px;left:14px;background:var(--aqua);color:#04302a}

  /* ---------- 要点列表 ---------- */
  .point-list{border-top:1px solid var(--line);margin-top:24px}
  .point-item{
    display:flex;gap:18px;align-items:flex-start;
    padding:22px 0;border-bottom:1px solid var(--line);
  }
  .point-num{
    font-family:var(--font-num);font-variant-numeric:tabular-nums;
    font-size:34px;font-weight:700;line-height:1;min-width:56px;
    color:transparent;-webkit-text-stroke:1.5px var(--brand);
  }
  .point-item h3{font-size:18px}
  .point-item p{color:var(--ink-2);font-size:15px;margin-top:8px}

  /* ---------- 卡片组 ---------- */
  .card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
    padding:20px;box-shadow:var(--shadow-1);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#D9D5CC}
  .card h3{font-size:18px;margin-bottom:8px}
  .card p{color:var(--ink-2);font-size:15px}

  /* ---------- FAQ ---------- */
  .faq-list{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-1)}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item:last-child{border-bottom:0}
  .faq-q{
    width:100%;display:flex;align-items:center;gap:14px;text-align:left;
    background:transparent;border:0;cursor:pointer;
    padding:18px 20px;color:var(--ink);font-size:16px;font-weight:600;line-height:1.6;
    transition:background .2s ease-out;
  }
  .faq-q:hover{background:#FBFAF8}
  .faq-mark{
    flex:0 0 auto;width:30px;height:30px;border-radius:8px;
    background:rgba(18,194,168,.14);color:var(--aqua-deep);
    display:inline-flex;align-items:center;justify-content:center;
    font-family:var(--font-num);font-size:14px;font-weight:700;
  }
  .faq-arrow{
    margin-left:auto;flex:0 0 auto;color:var(--ink-3);
    transition:transform .24s ease-out,color .24s ease-out;
  }
  .faq-item.open .faq-arrow{transform:rotate(180deg);color:var(--brand)}
  .faq-item.open .faq-q{background:#FBFAF8}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease-out}
  .faq-a-inner{padding:0 20px 20px 64px;color:var(--ink-2);font-size:15px;line-height:1.85}

  /* ---------- 侧栏信息卡 ---------- */
  .info-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    padding:24px;box-shadow:var(--shadow-1);
  }
  .info-card h3{font-size:18px;padding-bottom:14px;border-bottom:1px solid var(--line)}
  .info-list{display:grid;gap:12px;margin-top:16px}
  .info-list li{position:relative;padding-left:20px;font-size:15px;color:var(--ink-2)}
  .info-list li::before{
    content:"";position:absolute;left:0;top:10px;
    width:8px;height:8px;border-radius:2px;background:var(--aqua);
  }
  .info-card .btn{width:100%;margin-top:22px}
  .info-note{font-size:13px;color:var(--ink-3);margin-top:12px;text-align:center}
  @media (min-width:1024px){
    .sticky-wrap{position:sticky;top:24px}
  }

  /* ---------- 关联入口卡 ---------- */
  .link-card{
    display:flex;gap:16px;align-items:center;
    background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    padding:18px;box-shadow:var(--shadow-1);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .link-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--brand)}
  .link-card img{width:96px;height:72px;object-fit:cover;border-radius:var(--r-sm);flex:0 0 auto}
  .link-card h3{font-size:18px;margin-bottom:6px}
  .link-card p{color:var(--ink-2);font-size:14px;line-height:1.75}
  .link-card .text-link{margin-top:10px}
  @media (min-width:640px){
    .link-card img{width:140px;height:96px}
  }
  .chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
  .chip{
    display:inline-flex;align-items:center;height:34px;padding:0 14px;
    border-radius:999px;background:#fff;border:1px solid var(--line);
    font-size:14px;color:var(--ink-2);
    transition:border-color .2s ease-out,color .2s ease-out,transform .2s ease-out;
  }
  .chip:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}

  /* ---------- 帮助面板 ---------- */
  .help-panel{
    background:var(--brand-soft);border:1px solid #DCD5F6;border-radius:var(--r-lg);
    padding:28px;display:grid;gap:26px;
  }
  @media (min-width:900px){
    .help-panel{grid-template-columns:1.35fr .85fr;align-items:center;padding:40px}
  }
  .help-panel h2{font-size:22px}
  @media (min-width:768px){.help-panel h2{font-size:26px}}
  .help-panel p{color:var(--ink-2);font-size:15px;margin-top:12px;max-width:40em}
  .check-list{display:grid;gap:10px;margin-top:18px}
  .check-list li{position:relative;padding-left:26px;font-size:15px;color:var(--ink-2)}
  .check-list li::before{
    content:"";position:absolute;left:0;top:9px;width:13px;height:7px;
    border-left:2px solid var(--aqua);border-bottom:2px solid var(--aqua);
    transform:rotate(-45deg);
  }
  .help-actions{display:flex;flex-direction:column;gap:12px}
  .help-actions .btn{width:100%}
  .help-note{font-size:13px;color:var(--ink-3);text-align:center;margin-top:4px}

  /* ---------- 返回顶部 ---------- */
  .to-top{
    position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:999px;
    background:#fff;border:1px solid var(--line);color:var(--brand);
    display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
    box-shadow:var(--shadow-1);opacity:0;pointer-events:none;
    transition:opacity .24s ease-out,transform .2s ease-out;z-index:40;
  }
  .to-top.show{opacity:1;pointer-events:auto}
  .to-top:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}

  /* ---------- 页脚 ---------- */
  .site-footer{position:relative;background:var(--deep);color:#E8E5F5;margin-top:0;overflow:hidden;padding:56px 0 28px}
  @media (min-width:1024px){.site-footer{padding:72px 0 32px}}
  .grid-tex{
    position:absolute;inset:0;pointer-events:none;opacity:.07;
    background-image:linear-gradient(rgba(255,255,255,.55) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.55) 1px,transparent 1px);
    background-size:48px 48px;
  }
  .footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
  @media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px}}
  .footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:10px;letter-spacing:.04em}
  .footer-link{
    display:block;font-size:14px;color:rgba(232,229,245,.72);
    padding:6px 0;line-height:1.7;
    transition:color .2s ease-out;
  }
  @media (max-width:1023px){.footer-link{padding:10px 0;min-height:44px}}
  .footer-link:hover{color:#fff}
  .social-row{display:flex;gap:10px;margin-top:18px}
  .social-btn{
    width:38px;height:38px;border-radius:var(--r-sm);
    display:inline-flex;align-items:center;justify-content:center;
    background:rgba(255,255,255,.07);color:#E8E5F5;
    transition:background .2s ease-out,color .2s ease-out,transform .2s ease-out;
  }
  .social-btn:hover{background:var(--brand);color:#fff;transform:translateY(-2px)}
  .footer-bottom{
    margin-top:40px;padding-top:20px;border-top:1px solid var(--deep-line);
    display:flex;flex-direction:column;gap:8px;
    font-size:13px;color:rgba(232,229,245,.6);
  }
  @media (min-width:768px){
    .footer-bottom{flex-direction:row;align-items:center;justify-content:space-between}
  }

  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{transition:none!important;animation:none!important}
    html{scroll-behavior:auto}
    .btn:hover,.card:hover,.link-card:hover,.figure-card:hover img{transform:none}
  }