/* roulang page: index */
:root{
  --brand:#2F6BFF;
  --brand-dark:#1E4FD8;
  --brand-light:#EAF1FF;
  --ink:#13233A;
  --muted:#5B6B80;
  --bg:#F6F9FD;
  --surface:#FFFFFF;
  --surface-soft:#EEF4FC;
  --border:#DDE8F5;
  --teal:#0F8B8D;
  --coral:#FF7A59;
  --success:#1F9D72;
  --warn:#E58A1F;
  --error:#D94C4C;
  --radius-card:16px;
  --radius-panel:24px;
  --radius-btn:12px;
  --shadow-card:0 8px 28px rgba(21,49,92,.08);
  --shadow-card-hover:0 14px 36px rgba(21,49,92,.12);
  --sidebar-w:248px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
html body{
  margin:0;
  padding:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",-apple-system,BlinkMacSystemFont,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;height:auto;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:none;cursor:pointer;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:3px solid rgba(47,107,255,.28);
  outline-offset:2px;
  border-radius:6px;
}
body.no-scroll{overflow:hidden;}

/* ============ 布局骨架 ============ */
.main-wrap{
  margin-left:var(--sidebar-w);
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.wrap{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
.page-main{flex:1 0 auto;padding-bottom:8px;}

/* ============ 左侧导航 ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--surface);
  border-right:1px solid var(--border);
  padding:26px 18px 22px;
  display:flex;
  flex-direction:column;
  gap:22px;
  overflow-y:auto;
  z-index:60;
}
.brand-block{display:flex;flex-direction:column;gap:2px;padding:0 6px 6px;}
.brand-name{
  font-size:19px;
  font-weight:700;
  letter-spacing:-.2px;
  color:var(--ink);
  line-height:1.35;
}
.brand-sub{
  font-size:12px;
  color:var(--muted);
  letter-spacing:.4px;
}
.nav-group{display:flex;flex-direction:column;gap:4px;}
.nav-label{
  font-size:12px;
  color:#8A9AAE;
  letter-spacing:.12em;
  padding:0 12px 6px;
}
.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  height:44px;
  padding:0 14px;
  border-radius:10px;
  font-size:15px;
  color:#31445C;
  transition:background .18s ease,color .18s ease;
}
.nav-link:hover{background:#F2F7FF;}
.nav-link.active{
  background:var(--brand-light);
  color:var(--brand-dark);
  font-weight:600;
}
.nav-link.active::before{
  content:"";
  position:absolute;
  left:0;top:10px;bottom:10px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--brand);
}
.nav-dot{
  width:6px;height:6px;border-radius:999px;
  background:#C6D6EC;
  flex:0 0 auto;
}
.nav-link.active .nav-dot{background:var(--brand);}
.sidebar-help{
  margin-top:auto;
  background:var(--brand-light);
  border:1px solid #D5E3FF;
  border-radius:var(--radius-card);
  padding:16px 15px;
}
.sidebar-help h3{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:6px;}
.sidebar-help p{font-size:12.5px;line-height:1.7;color:#4A5C74;margin-bottom:12px;}
.sidebar-help .btn{height:40px;font-size:13.5px;padding:0 14px;width:100%;}

/* ============ 移动端顶栏与抽屉 ============ */
.mobile-topbar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:64px;
  background:#fff;
  border-bottom:1px solid var(--border);
  align-items:center;
  justify-content:space-between;
  padding:0 18px;
  z-index:80;
}
.mobile-topbar .brand-name{font-size:16px;}
.menu-btn{
  width:42px;height:42px;
  border-radius:10px;
  border:1px solid var(--border);
  display:grid;place-items:center;
  color:var(--ink);
  font-size:18px;
  background:#fff;
}
.menu-btn:hover{background:var(--brand-light);border-color:#C6D9FF;}
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(19,35,58,.42);
  z-index:90;
}
.drawer{
  position:fixed;
  top:0;left:0;bottom:0;
  width:280px;
  background:#fff;
  z-index:100;
  padding:22px 18px;
  display:flex;
  flex-direction:column;
  gap:16px;
  transform:translateX(-102%);
  transition:transform .28s ease;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;}
.drawer-close{
  width:36px;height:36px;border-radius:10px;
  border:1px solid var(--border);
  display:grid;place-items:center;
  font-size:18px;color:var(--muted);
}
.drawer .nav-link{border-bottom:1px solid #F1F6FC;border-radius:0;height:48px;}
.drawer .nav-link.active{border-radius:10px;border-bottom-color:transparent;}

/* ============ 倒计时条 ============ */
.countdown-bar{
  margin-top:26px;
  background:var(--brand-light);
  border:1px solid #D5E3FF;
  border-radius:var(--radius-card);
  padding:14px 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
}
.cd-left{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;color:#2A3F5C;}
.cd-dot{
  width:8px;height:8px;border-radius:999px;
  background:var(--coral);
  box-shadow:0 0 0 4px rgba(255,122,89,.16);
}
.cd-right{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.cd-cell{
  min-width:64px;
  background:#fff;
  border:1px solid #D5E3FF;
  border-radius:10px;
  padding:4px 10px 5px;
  text-align:center;
}
.cd-num{
  display:block;
  font-family:"DIN Alternate",Bahnschrift,"PingFang SC",sans-serif;
  font-variant-numeric:tabular-nums;
  font-size:20px;
  font-weight:700;
  line-height:1.25;
  color:var(--brand-dark);
}
.cd-unit{display:block;font-size:11px;color:var(--muted);letter-spacing:.06em;}
.cd-done{font-size:14px;font-weight:600;color:var(--brand-dark);}
.cd-done a{text-decoration:underline;text-underline-offset:3px;}

/* ============ Hero ============ */
.hero{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:48px;
  align-items:center;
  padding:52px 0 64px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:30px;
  padding:0 12px;
  border-radius:999px;
  background:#fff;
  border:1px solid var(--border);
  font-size:13px;
  color:var(--brand-dark);
  font-weight:600;
  margin-bottom:18px;
}
.hero h1{
  font-size:clamp(34px,3.6vw,46px);
  line-height:1.2;
  font-weight:700;
  letter-spacing:-.5px;
  color:var(--ink);
  margin-bottom:18px;
}
.hero-sub{
  font-size:16.5px;
  line-height:1.85;
  color:var(--muted);
  max-width:560px;
  margin-bottom:26px;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:30px;}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
  max-width:520px;
  border-top:1px solid var(--border);
  padding-top:20px;
}
.stat-num{
  font-family:"DIN Alternate",Bahnschrift,"PingFang SC",sans-serif;
  font-variant-numeric:tabular-nums;
  font-size:24px;
  font-weight:700;
  color:var(--brand-dark);
  line-height:1.3;
}
.stat-label{font-size:13px;color:var(--muted);}
.hero-media{position:relative;}
.hero-media img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  border-radius:20px;
  border:1px solid var(--border);
  box-shadow:0 18px 44px rgba(21,49,92,.12);
  background:#E7EEF9;
}
.hero-badge{
  position:absolute;
  left:20px;bottom:20px;
  background:var(--brand);
  color:#fff;
  font-size:13px;
  font-weight:600;
  padding:8px 14px;
  border-radius:999px;
  letter-spacing:.02em;
}

/* ============ 通用按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(47,107,255,.24);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(47,107,255,.2);}
.btn-ghost{background:#fff;color:var(--brand);border-color:rgba(47,107,255,.45);}
.btn-ghost:hover{background:var(--brand-light);}
.btn-ghost:active{background:#DCE9FF;}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-size:14px;font-weight:600;
}
.link-arrow span{transition:transform .18s ease;}
.link-arrow:hover span{transform:translateX(4px);}
.link-arrow:hover{color:var(--brand-dark);text-decoration:underline;text-underline-offset:3px;}

/* ============ 板块标题 ============ */
.section{padding:64px 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:32px;
  flex-wrap:wrap;
}
.section-head h2{
  font-size:clamp(25px,2.4vw,31px);
  line-height:1.3;
  font-weight:700;
  letter-spacing:-.3px;
  margin-bottom:8px;
}
.section-head p{font-size:15px;color:var(--muted);max-width:620px;}

/* ============ 活动卖点 2×2 ============ */
.highlight-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.hl-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  padding:26px 26px 24px;
  transition:box-shadow .22s ease,border-color .22s ease,transform .22s ease;
}
.hl-card:hover{
  box-shadow:var(--shadow-card-hover);
  border-color:rgba(47,107,255,.3);
  transform:translateY(-2px);
}
.hl-card.offset{margin-top:24px;}
.hl-index{
  font-family:"DIN Alternate",Bahnschrift,"PingFang SC",sans-serif;
  font-size:14px;
  font-weight:700;
  color:var(--brand);
  background:var(--brand-light);
  border-radius:8px;
  display:inline-block;
  padding:2px 10px;
  margin-bottom:14px;
  letter-spacing:.08em;
}
.hl-card h3{font-size:19px;font-weight:700;margin-bottom:8px;}
.hl-card p{font-size:15px;color:var(--muted);margin-bottom:16px;}

/* ============ 图墙 ============ */
.gallery-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px;}
.g-tile{
  position:relative;
  overflow:hidden;
  border-radius:16px;
  background:#fff;
  border:1px solid var(--border);
  box-shadow:var(--shadow-card);
  transition:box-shadow .22s ease,border-color .22s ease;
}
.g-tile:hover{box-shadow:var(--shadow-card-hover);border-color:rgba(47,107,255,.3);}
.g-tile--wide{grid-column:span 6;}
.g-tile--sm{grid-column:span 3;}
.g-tile--third{grid-column:span 4;}
.g-tile img{
  width:100%;
  height:206px;
  object-fit:cover;
  transition:transform .38s ease;
  background:#E7EEF9;
}
.g-tile--wide img{height:252px;}
.g-tile:hover img{transform:scale(1.03);}
.g-cap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:13px 16px;
  font-size:14.5px;
  font-weight:600;
  color:var(--ink);
  background:#fff;
}
.g-arrow{color:#B4C6DE;transition:color .18s ease,transform .18s ease;font-size:16px;}
.g-tile:hover .g-arrow{color:var(--brand);transform:translateX(3px);}

/* ============ 报名面板 ============ */
.join-panel{
  background:var(--brand-light);
  border:1px solid #D5E3FF;
  border-radius:var(--radius-panel);
  padding:40px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:start;
}
.join-copy h2{
  font-size:clamp(24px,2.3vw,30px);
  line-height:1.32;
  font-weight:700;
  margin-bottom:12px;
}
.join-copy p{font-size:15px;color:#40536C;margin-bottom:22px;}
.join-points{display:flex;flex-direction:column;gap:12px;}
.join-points li{
  display:flex;
  gap:10px;
  font-size:14.5px;
  color:#33465F;
  line-height:1.75;
}
.join-points li::before{
  content:"";
  flex:0 0 auto;
  width:7px;height:7px;
  margin-top:9px;
  border-radius:999px;
  background:var(--brand);
}
.join-form{
  background:#fff;
  border:1px solid var(--border);
  border-radius:20px;
  padding:26px;
  box-shadow:var(--shadow-card);
}
.field{margin-bottom:16px;}
.field label{
  display:block;
  font-size:13.5px;
  font-weight:600;
  color:#2A3F5C;
  margin-bottom:7px;
}
.req{color:var(--brand);}
.field input,
.field select,
.field textarea{
  width:100%;
  height:48px;
  padding:0 14px;
  border:1px solid var(--border);
  border-radius:var(--radius-btn);
  background:#fff;
  font-size:15px;
  color:var(--ink);
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.field textarea{height:96px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input::placeholder,
.field textarea::placeholder{color:#9AAABF;}
.field input:hover,
.field select:hover,
.field textarea:hover{border-color:#C6D9FF;}
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(47,107,255,.16);
}
.field input.invalid,
.field select.invalid{border-color:var(--error);box-shadow:0 0 0 3px rgba(217,76,76,.12);}
.field-error{
  display:none;
  font-size:13px;
  color:var(--error);
  margin-top:6px;
  line-height:1.6;
}
.field-error.show{display:block;}
.check-row{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:13.5px;
  color:var(--muted);
  line-height:1.7;
  margin-bottom:18px;
}
.check-row input{
  width:18px;height:18px;
  margin-top:3px;
  accent-color:var(--brand);
  flex:0 0 auto;
}
.check-row a{color:var(--brand);font-weight:600;}
.check-row a:hover{text-decoration:underline;text-underline-offset:3px;}
.form-msg{
  display:none;
  border-radius:12px;
  padding:12px 14px;
  font-size:14px;
  line-height:1.7;
  margin-bottom:14px;
}
.form-msg.show{display:block;}
.form-msg.ok{background:#E9F8F1;border:1px solid #BFE9D6;color:#146F51;}
.form-msg.err{background:#FDECEC;border:1px solid #F6C9C9;color:#A93333;}

/* ============ 最新信息 ============ */
.news-list{display:flex;flex-direction:column;gap:14px;}
.news-item{
  display:grid;
  grid-template-columns:82px 1fr 24px;
  gap:18px;
  align-items:flex-start;
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:18px 22px;
  box-shadow:var(--shadow-card);
  transition:box-shadow .22s ease,border-color .22s ease,transform .22s ease;
}
.news-item:hover{
  box-shadow:var(--shadow-card-hover);
  border-color:rgba(47,107,255,.3);
  transform:translateY(-2px);
}
.news-date{
  display:block;
  width:82px;
  background:var(--brand-light);
  border-radius:12px;
  padding:9px 6px;
  text-align:center;
  font-size:13px;
  font-weight:700;
  color:var(--brand-dark);
  font-variant-numeric:tabular-nums;
  line-height:1.5;
  word-break:break-all;
}
.news-main{display:block;min-width:0;}
.news-meta{display:flex;align-items:center;gap:8px;margin-bottom:6px;flex-wrap:wrap;}
.badge{
  display:inline-flex;
  align-items:center;
  height:23px;
  padding:0 10px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
}
.badge-soft{background:var(--brand-light);color:var(--brand-dark);}
.badge-teal{background:#E4F5F5;color:#0B6E70;}
.news-title{
  display:block;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  line-height:1.6;
  margin-bottom:4px;
}
.news-item:hover .news-title{color:var(--brand-dark);}
.news-summary{
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  font-size:14px;
  color:var(--muted);
  line-height:1.75;
}
.news-arrow{
  align-self:center;
  color:#B4C6DE;
  font-size:17px;
  transition:color .18s ease,transform .18s ease;
}
.news-item:hover .news-arrow{color:var(--brand);transform:translateX(3px);}
.empty-state{
  border:1px dashed #BFD6F6;
  background:#F4F8FF;
  border-radius:var(--radius-card);
  padding:38px 24px;
  text-align:center;
  color:#5C7391;
  font-size:15px;
}

/* ============ FAQ ============ */
.faq-layout{
  display:grid;
  grid-template-columns:4fr 8fr;
  gap:48px;
  align-items:start;
}
.faq-aside h2{
  font-size:clamp(24px,2.3vw,30px);
  line-height:1.32;
  font-weight:700;
  margin-bottom:12px;
}
.faq-aside p{font-size:15px;color:var(--muted);margin-bottom:20px;}
.faq-list{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:6px 24px;}
.faq-item{border-bottom:1px solid var(--border);}
.faq-item:last-child{border-bottom:none;}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 0;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  transition:background .18s ease;
  border-radius:8px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{background:rgba(234,241,255,.4);}
.faq-icon{
  flex:0 0 auto;
  width:28px;height:28px;
  border-radius:999px;
  background:var(--brand-light);
  color:var(--brand-dark);
  display:grid;
  place-items:center;
  font-size:16px;
  font-weight:600;
  line-height:1;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.faq-item[open] .faq-icon{background:var(--brand);color:#fff;transform:rotate(180deg);}
.faq-answer{
  padding:0 0 20px;
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:56px;
  background:#13233A;
  color:#C8D6E8;
  padding:56px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:40px;
}
.footer-brand .brand-name{color:#fff;font-size:19px;margin-bottom:10px;}
.footer-brand p{font-size:14px;line-height:1.85;color:#93A7C1;max-width:300px;}
.footer-col h3{
  font-size:14px;
  font-weight:600;
  color:#FFFFFF;
  margin-bottom:14px;
  letter-spacing:.03em;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{
  font-size:15px;
  color:#A8BACE;
  transition:color .18s ease;
}
.footer-col a:hover{color:#FFFFFF;text-decoration:underline;text-underline-offset:3px;}
.footer-contact li{font-size:14px;color:#A8BACE;line-height:1.8;}
.footer-contact strong{color:#fff;font-weight:600;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13.5px;
  color:#8EA2BC;
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .hero{gap:36px;}
  .join-panel{gap:28px;padding:32px;}
  .faq-layout{gap:32px;}
}
@media (max-width:1023px){
  .sidebar{display:none;}
  .mobile-topbar{display:flex;}
  .main-wrap{margin-left:0;padding-top:64px;}
  .wrap{padding:0 24px;}
  .hero{grid-template-columns:1fr;padding:36px 0 44px;gap:28px;}
  .hero-media{order:2;}
  .hero-media img{aspect-ratio:16/10;}
  .hero-sub{max-width:none;}
  .hero-stats{max-width:none;}
  .join-panel{grid-template-columns:1fr;padding:28px;}
  .faq-layout{grid-template-columns:1fr;}
  .g-tile--wide{grid-column:span 12;}
  .g-tile--sm{grid-column:span 6;}
  .g-tile--third{grid-column:span 6;}
  .g-tile img,.g-tile--wide img{height:210px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .wrap{padding:0 20px;}
  .section{padding:44px 0;}
  .countdown-bar{padding:12px 16px;gap:10px;}
  .cd-cell{min-width:56px;padding:3px 8px 4px;}
  .cd-num{font-size:18px;}
  .highlight-grid{grid-template-columns:1fr;gap:16px;}
  .hl-card.offset{margin-top:0;}
  .g-tile--sm,.g-tile--third,.g-tile--wide{grid-column:span 12;}
  .g-tile img,.g-tile--wide img{height:196px;}
  .news-item{grid-template-columns:1fr;gap:10px;padding:16px 18px;}
  .news-date{width:auto;display:inline-block;padding:4px 10px;text-align:left;border-radius:8px;}
  .news-arrow{display:none;}
  .join-form{padding:20px;}
  .hero-actions .btn{width:100%;}
  .faq-list{padding:4px 18px;}
  .faq-aside{margin-bottom:4px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:519px){
  .hero h1{font-size:30px;}
  .hero-stats{grid-template-columns:1fr 1fr;gap:12px;}
  .stat-num{font-size:21px;}
  .footer-grid{grid-template-columns:1fr;}
  .cd-right{width:100%;}
  .cd-cell{flex:1 1 0;min-width:0;}
}

/* roulang page: article */
:root{
  --brand:#2F6BFF; --brand-dark:#1E4FD8; --brand-soft:#EAF1FF;
  --ink:#13233A; --muted:#5B6B80; --bg:#F6F9FD; --surface:#FFFFFF;
  --surface-2:#EEF4FC; --line:#DDE8F5;
  --teal:#0F8B8D; --coral:#FF7A59; --ok:#1F9D72; --warn:#E58A1F; --err:#D94C4C;
  --r-card:16px; --r-panel:24px; --r-btn:12px;
  --shadow:0 8px 28px rgba(21,49,92,.08);
  --shadow-hover:0 14px 36px rgba(21,49,92,.12);
  --sidebar-w:248px;
}
*,*::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","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  font-size:16px; line-height:1.85; -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease;}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:0;list-style:none;}
::selection{background:rgba(47,107,255,.18);}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ============ 左侧导航 ============ */
.sidebar{
  position:fixed; top:0; left:0; width:var(--sidebar-w); height:100vh;
  background:var(--surface); border-right:1px solid var(--line);
  padding:26px 16px 20px; display:flex; flex-direction:column;
  overflow-y:auto; z-index:50;
}
.brand{display:flex;flex-direction:column;gap:4px;padding:0 10px 18px;border-bottom:1px solid var(--line);}
.brand-mark{display:flex;align-items:center;gap:8px;}
.brand-dot{width:10px;height:10px;border-radius:4px;background:var(--brand);flex:none;}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.2px;color:var(--ink);line-height:1.3;}
.brand-sub{font-size:12px;color:#8B9CB5;letter-spacing:.08em;padding-left:18px;}
.nav-group{display:flex;flex-direction:column;gap:3px;margin-top:22px;}
.nav-label{font-size:12px;font-weight:600;letter-spacing:.16em;color:#9AAAC1;padding:0 12px 8px;}
.nav-link{
  display:flex;align-items:center;gap:10px;height:44px;padding:0 12px;
  border-radius:10px;border-left:3px solid transparent;
  font-size:15px;font-weight:500;color:#33475F;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.nav-link:hover{background:#F2F7FF;color:var(--brand-dark);}
.nav-link.active{background:var(--brand-soft);color:var(--brand-dark);border-left-color:var(--brand);font-weight:600;}
.nav-link:focus-visible{outline:3px solid rgba(47,107,255,.28);outline-offset:1px;}
.nav-dot{width:6px;height:6px;border-radius:999px;background:#C9D8EE;flex:none;}
.nav-link.active .nav-dot{background:var(--brand);}
.sidebar-help{
  margin-top:auto;background:var(--brand-soft);border:1px solid #D3E2FF;
  border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:10px;
}
.sidebar-help strong{font-size:14px;color:#1B3A73;font-weight:700;line-height:1.5;}
.sidebar-help p{font-size:12.5px;line-height:1.7;color:#4E6B96;}
.btn-help{
  display:inline-flex;align-items:center;justify-content:center;height:38px;
  background:var(--brand);color:#fff;border-radius:10px;font-size:13.5px;font-weight:600;
  transition:background .18s ease,transform .18s ease;
}
.btn-help:hover{background:var(--brand-dark);transform:translateY(-1px);}
.btn-help:focus-visible{outline:3px solid rgba(47,107,255,.28);outline-offset:2px;}

/* ============ 移动端顶栏与抽屉 ============ */
.mobile-bar{
  position:fixed;top:0;left:0;right:0;height:64px;z-index:60;
  background:rgba(255,255,255,.96);backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
  display:none;align-items:center;justify-content:space-between;padding:0 20px;
}
.mobile-logo{font-size:16px;font-weight:700;color:var(--ink);}
.mobile-logo span{display:block;font-size:11px;font-weight:400;color:#8B9CB5;letter-spacing:.06em;}
.menu-btn{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:var(--surface);display:flex;align-items:center;justify-content:center;
  flex-direction:column;gap:4px;cursor:pointer;
}
.menu-btn span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;}
.menu-btn:focus-visible{outline:3px solid rgba(47,107,255,.28);}
.drawer{position:fixed;inset:0;z-index:90;display:none;}
.drawer.open{display:block;}
.drawer-mask{position:absolute;inset:0;background:rgba(19,35,58,.45);}
.drawer-panel{
  position:absolute;top:0;left:0;width:84%;max-width:330px;height:100%;
  background:var(--surface);padding:20px;overflow-y:auto;
  display:flex;flex-direction:column;box-shadow:0 20px 50px rgba(19,35,58,.25);
}
.drawer-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-close{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:#fff;
  color:var(--muted);font-size:18px;line-height:1;cursor:pointer;
}
.drawer-close:focus-visible{outline:3px solid rgba(47,107,255,.28);}
.drawer .nav-group{margin-top:14px;}
.drawer .nav-link{height:48px;border-left:none;border-bottom:1px solid #F1F6FD;border-radius:0;}
.drawer .nav-link.active{background:var(--brand-soft);border-radius:10px;border-bottom-color:transparent;}
.drawer .sidebar-help{margin-top:24px;}
body.no-scroll{overflow:hidden;}

/* ============ 主区容器 ============ */
.main-shell{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.crumb-bar{border-bottom:1px solid var(--line);background:rgba(255,255,255,.6);}
.crumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:16px 0;font-size:13.5px;color:var(--muted);}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#C3D2E6;}
.crumb .now{color:var(--ink);font-weight:600;max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ 文章头部 ============ */
.article-head{padding:38px 0 26px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;
  border-radius:999px;background:var(--brand-soft);color:var(--brand-dark);
  font-size:12.5px;font-weight:600;letter-spacing:.04em;
}
.badge-teal{background:#E4F5F5;color:#0B7476;}
.article-title{
  margin-top:16px;font-size:clamp(28px,3.4vw,40px);line-height:1.28;font-weight:700;
  letter-spacing:-.2px;overflow-wrap:break-word;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:18px;font-size:14px;color:var(--muted);}
.article-meta .dot{width:4px;height:4px;border-radius:999px;background:#C3D2E6;}
.meta-chip{display:inline-flex;align-items:center;gap:6px;font-weight:500;color:#3B5578;}
.meta-chip i{width:6px;height:6px;border-radius:999px;background:var(--brand);display:inline-block;}

/* ============ 正文布局 ============ */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:48px;
  align-items:start;padding:8px 0 72px;
}
.article-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-panel);
  box-shadow:var(--shadow);padding:36px 40px 44px;
}
.article-body{max-width:760px;font-size:17px;line-height:1.9;color:#22364F;overflow-wrap:break-word;}
.article-body h2{
  position:relative;font-size:25px;line-height:1.45;font-weight:700;color:var(--ink);
  margin:40px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.3em;bottom:.3em;width:3px;
  border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:19px;font-weight:700;color:var(--ink);margin:28px 0 12px;line-height:1.5;}
.article-body p{margin:0 0 18px;}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:20px;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:8px;padding-left:2px;}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand-dark);}
.article-body blockquote{
  margin:24px 0;padding:16px 22px;background:var(--surface-2);
  border-left:3px solid var(--brand);border-radius:0 12px 12px 0;color:#3B4E67;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:12px;margin:22px 0 10px;height:auto;}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--muted);line-height:1.7;margin-top:8px;text-align:center;}
.article-body table{
  width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;line-height:1.7;}
.article-body th{background:var(--surface-2);font-weight:600;color:var(--ink);}
.article-body strong{font-weight:700;color:var(--ink);}
.article-body hr{border:none;border-top:1px solid var(--line);margin:32px 0;}

/* 空态 */
.empty-state{
  border:1.5px dashed #C3D8F6;background:#F7FAFF;border-radius:var(--r-card);
  padding:44px 24px;text-align:center;
}
.empty-state h3{font-size:19px;font-weight:700;color:var(--ink);margin-bottom:10px;}
.empty-state p{font-size:14.5px;color:var(--muted);line-height:1.8;margin-bottom:20px;}

/* ============ 侧栏 ============ */
.aside-card{
  position:sticky;top:32px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--shadow);padding:20px;
}
.aside-card h4{font-size:13px;font-weight:700;letter-spacing:.1em;color:#8B9CB5;margin-bottom:12px;}
.aside-list{display:flex;flex-direction:column;gap:2px;margin-bottom:18px;}
.aside-list a{
  display:flex;align-items:center;gap:8px;font-size:14px;color:#3B5578;
  padding:8px 10px;border-radius:8px;transition:background .18s ease,color .18s ease;
}
.aside-list a::before{content:"";width:4px;height:4px;border-radius:999px;background:#C3D2E6;}
.aside-list a:hover{background:#F2F7FF;color:var(--brand);}
.aside-list a:hover::before{background:var(--brand);}
.aside-note{font-size:12.5px;line-height:1.75;color:var(--muted);border-top:1px solid var(--line);padding-top:14px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(47,107,255,.22);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 10px 24px rgba(30,79,216,.26);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--brand);border-color:#C7DBFF;}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn:focus-visible{outline:3px solid rgba(47,107,255,.28);outline-offset:2px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand);
}
.link-arrow svg{transition:transform .18s ease;}
.link-arrow:hover{color:var(--brand-dark);text-decoration:underline;text-underline-offset:4px;}
.link-arrow:hover svg{transform:translateX(3px);}

/* ============ 相关推荐 ============ */
.related{padding:0 0 72px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px;}
.section-head h2{font-size:26px;font-weight:700;letter-spacing:-.2px;}
.section-head p{font-size:14px;color:var(--muted);margin-top:6px;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rel-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.rel-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:rgba(47,107,255,.3);}
.rel-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--surface-2);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.rel-card:hover .rel-thumb img{transform:scale(1.03);}
.rel-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-tag{align-self:flex-start;font-size:12px;font-weight:600;color:var(--brand-dark);background:var(--brand-soft);border-radius:999px;padding:3px 10px;}
.rel-body h3{font-size:16.5px;font-weight:700;line-height:1.55;color:var(--ink);}
.rel-body p{font-size:13.5px;line-height:1.75;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:6px;font-size:12.5px;color:#93A4BC;}

/* ============ 底部 CTA ============ */
.cta-band{
  background:var(--brand-soft);border:1px solid #D3E2FF;border-radius:var(--r-panel);
  padding:36px 40px;display:flex;align-items:center;justify-content:space-between;
  gap:28px;margin-bottom:72px;
}
.cta-band h2{font-size:24px;font-weight:700;color:#15315C;line-height:1.4;}
.cta-band p{font-size:14.5px;color:#4E6B96;margin-top:8px;line-height:1.8;max-width:560px;}
.cta-actions{display:flex;gap:12px;flex:none;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#C6D5E8;margin-top:auto;}
.site-footer .wrap{padding-top:56px;padding-bottom:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px;}
.footer-brand .brand-name{font-size:18px;font-weight:700;color:#fff;letter-spacing:.2px;}
.footer-brand p{margin-top:12px;font-size:13.5px;line-height:1.85;color:#93AAC8;max-width:320px;}
.footer-col h3{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14.5px;color:#A9BFDA;}
.footer-col a:hover{color:#fff;}
.footer-contact li{font-size:13.5px;line-height:1.8;color:#93AAC8;}
.footer-contact strong{color:#C6D5E8;font-weight:600;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:#7F97B6;flex-wrap:wrap;
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;}
  .article-aside{display:none;}
  .article-panel{padding:32px 32px 38px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:1023px){
  .mobile-bar{display:flex;}
  .sidebar{display:none;}
  .main-shell{margin-left:0;padding-top:64px;}
  .wrap{padding:0 20px;}
  .article-panel{padding:26px 22px 32px;border-radius:18px;}
  .article-body{font-size:16.5px;}
  .article-body h2{font-size:22px;margin-top:32px;}
  .article-body h3{font-size:18px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 24px;border-radius:18px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1;min-width:140px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
}
@media (max-width:767px){
  .article-head{padding:26px 0 18px;}
  .article-title{font-size:26px;line-height:1.35;}
  .crumb .now{max-width:200px;}
  .related-grid{grid-template-columns:minmax(0,1fr);gap:18px;}
  .section-head{flex-direction:column;align-items:flex-start;}
  .section-head h2{font-size:22px;}
  .related,.cta-band{padding-bottom:0;}
  .related{padding-bottom:48px;}
  .cta-band{margin-bottom:48px;}
  .article-layout{padding-bottom:48px;}
  .footer-brand p{max-width:none;}
}
@media (max-width:519px){
  .wrap{padding:0 16px;}
  .article-title{font-size:24px;}
  .article-body{font-size:16px;line-height:1.85;}
  .article-panel{padding:22px 16px 26px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .cta-actions .btn{flex:1 1 100%;}
  .article-body table{font-size:14px;}
  .article-body th,.article-body td{padding:8px 10px;}
}

/* roulang page: category1 */
:root{
    --brand:#2F6BFF;
    --brand-dark:#1E4FD8;
    --brand-soft:#EAF1FF;
    --ink:#13233A;
    --muted:#5B6B80;
    --bg:#F6F9FD;
    --surface:#FFFFFF;
    --surface-2:#EEF4FC;
    --line:#DDE8F5;
    --teal:#0F8B8D;
    --coral:#FF7A59;
    --ok:#1F9D72;
    --warn:#E58A1F;
    --err:#D94C4C;
    --r-card:16px;
    --r-panel:24px;
    --r-btn:12px;
    --shadow:0 8px 28px rgba(21,49,92,.08);
    --shadow-hover:0 14px 36px rgba(21,49,92,.12);
    --sidebar:248px;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body.site-body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",sans-serif;
    background:var(--bg);
    color:var(--ink);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block;height:auto}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0}
  ul,ol{padding:0;list-style:none}
  button{font:inherit;border:0;background:none;cursor:pointer;color:inherit}
  :focus-visible{outline:3px solid rgba(47,107,255,.28);outline-offset:2px;border-radius:8px}

  /* ---------- 侧栏 ---------- */
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;width:var(--sidebar);
    background:var(--surface);border-right:1px solid var(--line);
    display:flex;flex-direction:column;gap:24px;
    padding:26px 18px 22px;overflow-y:auto;z-index:60;
  }
  .brand-block{display:flex;flex-direction:column;gap:4px;padding:2px 6px 0}
  .brand-name{
    font-size:17px;font-weight:700;letter-spacing:.2px;color:var(--ink);
    line-height:1.35;word-break:break-word;
  }
  .brand-sub{font-size:12px;color:var(--muted);letter-spacing:.4px}
  .brand-mark{
    width:34px;height:34px;border-radius:10px;background:var(--brand);
    display:grid;place-items:center;color:#fff;font-weight:700;font-size:15px;
    margin-bottom:10px;box-shadow:0 6px 16px rgba(47,107,255,.28);
  }
  .nav-group{display:flex;flex-direction:column;gap:4px}
  .nav-label{
    font-size:11px;letter-spacing:.18em;color:#93A6BE;
    padding:0 14px 8px;text-transform:uppercase;
  }
  .nav-link{
    position:relative;display:flex;align-items:center;gap:10px;
    height:44px;padding:0 14px;border-radius:10px;
    font-size:15px;font-weight:500;color:#33475F;
    transition:background .18s ease,color .18s ease;
  }
  .nav-link:hover{background:rgba(234,241,255,.8);color:var(--brand-dark)}
  .nav-link.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:600}
  .nav-link.active::before{
    content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
    border-radius:3px;background:var(--brand);
  }
  .nav-dot{width:6px;height:6px;border-radius:50%;background:#C9D8EB;flex:0 0 auto;transition:background .18s ease}
  .nav-link.active .nav-dot{background:var(--brand)}

  .help-card{
    margin-top:auto;background:var(--brand-soft);border:1px solid #D6E4FF;
    border-radius:var(--r-card);padding:18px;
  }
  .help-card h3{font-size:14px;font-weight:700;color:var(--brand-dark);margin-bottom:6px}
  .help-card p{font-size:13px;line-height:1.75;color:#43587A;margin-bottom:14px}
  .help-card .btn{width:100%;justify-content:center;font-size:14px;height:42px}

  /* ---------- 移动端顶栏 ---------- */
  .mobile-topbar{
    display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:70;
    background:var(--surface);border-bottom:1px solid var(--line);
    align-items:center;justify-content:space-between;padding:0 20px;
  }
  .mobile-topbar .brand-name{font-size:15px}
  .mobile-topbar .brand-sub{font-size:11px}
  .menu-btn{
    width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
    display:grid;place-items:center;background:var(--surface);
  }
  .menu-btn span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
  .menu-btn span::before,.menu-btn span::after{
    content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
  }
  .menu-btn span::before{top:-6px}
  .menu-btn span::after{top:6px}

  .drawer-mask{
    position:fixed;inset:0;background:rgba(19,35,58,.42);z-index:80;
    opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s ease;
  }
  .drawer-mask.open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;left:0;bottom:0;width:288px;max-width:86vw;z-index:90;
    background:var(--surface);border-right:1px solid var(--line);
    display:flex;flex-direction:column;gap:20px;padding:22px 18px;
    transform:translateX(-102%);transition:transform .26s cubic-bezier(.4,0,.2,1);
    overflow-y:auto;
  }
  .drawer.open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
  .drawer-close{
    width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
    display:grid;place-items:center;font-size:18px;color:var(--muted);line-height:1;
  }
  .drawer .nav-link{height:48px}

  /* ---------- 主容器 ---------- */
  .page-shell{
    margin-left:var(--sidebar);min-height:100vh;
    display:flex;flex-direction:column;
  }
  .wrap{max-width:1200px;margin:0 auto;padding:0 32px;width:100%}
  main{flex:1 1 auto}

  /* ---------- 面包屑 ---------- */
  .crumb{
    display:flex;align-items:center;gap:8px;flex-wrap:wrap;
    font-size:13px;color:var(--muted);padding:26px 0 0;
  }
  .crumb a{color:var(--muted);transition:color .18s ease}
  .crumb a:hover{color:var(--brand)}
  .crumb .sep{color:#B9C8DC}
  .crumb .current{color:var(--ink);font-weight:600}

  /* ---------- Hero ---------- */
  .hero{
    display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;
    padding:44px 0 72px;
  }
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--brand-soft);color:var(--brand-dark);
    font-size:12.5px;font-weight:600;letter-spacing:.04em;
    padding:6px 14px;border-radius:999px;margin-bottom:18px;
  }
  .eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}
  .hero-title{
    font-size:clamp(32px,3.8vw,46px);line-height:1.22;font-weight:700;
    letter-spacing:-.01em;color:var(--ink);margin-bottom:18px;
  }
  .hero-title em{font-style:normal;color:var(--brand)}
  .hero-sub{font-size:16.5px;line-height:1.85;color:var(--muted);max-width:560px;margin-bottom:28px}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
  .hero-meta{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13.5px;color:var(--muted)}
  .hero-meta li{display:flex;align-items:center;gap:8px}
  .hero-meta li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--teal);flex:0 0 auto}

  .hero-media{position:relative}
  .hero-media img{
    width:100%;aspect-ratio:4/3;object-fit:cover;
    border-radius:20px;border:1px solid var(--line);
    box-shadow:var(--shadow);
  }
  .media-badge{
    position:absolute;left:18px;bottom:18px;
    background:var(--brand);color:#fff;font-size:13px;font-weight:600;
    padding:9px 16px;border-radius:999px;
    box-shadow:0 8px 20px rgba(47,107,255,.32);
  }
  .media-caption{
    position:absolute;right:16px;top:16px;background:#fff;
    border:1px solid var(--line);border-radius:999px;
    font-size:12px;color:var(--muted);padding:6px 12px;
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;letter-spacing:.01em;
    transition:transform .18s ease,background .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease;
    border:1px solid transparent;white-space:nowrap;
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(47,107,255,.24)}
  .btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 26px rgba(30,79,216,.28)}
  .btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(30,79,216,.24)}
  .btn-ghost{background:#fff;color:var(--brand);border-color:#C7D9FF}
  .btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand);transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-sm{height:42px;padding:0 18px;font-size:14px}

  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
    color:var(--brand);transition:color .18s ease,gap .18s ease;
  }
  .link-arrow::after{content:"→";transition:transform .18s ease}
  .link-arrow:hover{color:var(--brand-dark)}
  .link-arrow:hover::after{transform:translateX(3px)}

  /* ---------- 板块标题 ---------- */
  .section{padding:72px 0}
  .section-alt{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .section-head{max-width:720px;margin-bottom:40px}
  .section-head h2{font-size:clamp(24px,2.6vw,31px);line-height:1.35;font-weight:700;margin-bottom:12px}
  .section-head p{font-size:15.5px;color:var(--muted);line-height:1.85}
  .section-kicker{
    display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.14em;
    color:var(--brand);text-transform:uppercase;margin-bottom:10px;
  }

  /* ---------- 流程时间线 ---------- */
  .timeline{position:relative;max-width:940px}
  .step{
    position:relative;display:grid;grid-template-columns:56px 1fr;gap:22px;
    padding-bottom:26px;
  }
  .step:last-child{padding-bottom:0}
  .step:not(:last-child)::before{
    content:"";position:absolute;left:27px;top:56px;bottom:0;width:2px;
    background:var(--line);border-radius:2px;
  }
  .step-num{
    width:56px;height:56px;border-radius:16px;background:#fff;border:1px solid var(--line);
    display:grid;place-items:center;font-weight:700;font-size:18px;color:var(--brand);
    box-shadow:var(--shadow);font-variant-numeric:tabular-nums;position:relative;z-index:1;
  }
  .step-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    padding:24px 26px;box-shadow:var(--shadow);
    transition:box-shadow .22s ease,border-color .22s ease,transform .22s ease;
  }
  .step-card:hover{box-shadow:var(--shadow-hover);border-color:rgba(47,107,255,.3);transform:translateY(-2px)}
  .step-card h3{font-size:19px;font-weight:700;margin-bottom:8px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
  .step-card h3 .tag{
    font-size:12px;font-weight:600;color:var(--teal);background:#E6F5F5;
    border-radius:999px;padding:3px 10px;
  }
  .step-card p{font-size:15.5px;color:var(--muted);line-height:1.85;margin-bottom:14px}
  .step-note{
    display:flex;gap:10px;align-items:flex-start;
    background:#FFF7F4;border:1px solid #FFE0D6;border-radius:12px;
    padding:12px 14px;font-size:13.5px;line-height:1.75;color:#8A4B36;
  }
  .step-note::before{content:"!";flex:0 0 auto;width:18px;height:18px;border-radius:50%;
    background:var(--coral);color:#fff;font-size:12px;font-weight:700;display:grid;place-items:center;margin-top:2px}

  /* ---------- 提示条 ---------- */
  .notice{
    display:flex;gap:16px;align-items:flex-start;
    background:var(--brand-soft);border:1px solid #D3E2FF;border-radius:var(--r-card);
    padding:22px 26px;margin-top:36px;
  }
  .notice-icon{
    flex:0 0 auto;width:34px;height:34px;border-radius:10px;background:var(--brand);
    color:#fff;display:grid;place-items:center;font-weight:700;font-size:15px;
  }
  .notice strong{display:block;font-size:15.5px;color:var(--brand-dark);margin-bottom:4px}
  .notice p{font-size:14.5px;line-height:1.8;color:#3C5480}

  /* ---------- 小贴士卡 ---------- */
  .tip-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:36px}
  .tip-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    padding:24px;box-shadow:var(--shadow);
    transition:box-shadow .22s ease,border-color .22s ease,transform .22s ease;
  }
  .tip-card:hover{box-shadow:var(--shadow-hover);border-color:rgba(47,107,255,.3);transform:translateY(-2px)}
  .tip-card span.ico{
    width:40px;height:40px;border-radius:12px;background:var(--brand-soft);color:var(--brand);
    display:grid;place-items:center;font-weight:700;font-size:16px;margin-bottom:14px;
  }
  .tip-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
  .tip-card p{font-size:14.5px;color:var(--muted);line-height:1.8}

  /* ---------- FAQ ---------- */
  .faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
  .faq-aside h2{font-size:clamp(24px,2.6vw,31px);line-height:1.35;font-weight:700;margin-bottom:12px}
  .faq-aside p{font-size:15.5px;color:var(--muted);line-height:1.85;margin-bottom:20px}
  .faq-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-panel);padding:6px 26px;box-shadow:var(--shadow)}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item:last-child{border-bottom:0}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
    gap:18px;padding:21px 0;font-size:17px;font-weight:600;color:var(--ink);
    transition:color .18s ease;border-radius:8px;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary:hover{color:var(--brand-dark)}
  .faq-icon{
    flex:0 0 auto;width:28px;height:28px;border-radius:50%;background:var(--brand-soft);
    color:var(--brand);display:grid;place-items:center;font-size:16px;font-weight:700;
    line-height:1;transition:background .2s ease,color .2s ease;
  }
  .faq-icon::before{content:"+"}
  .faq-item[open] .faq-icon{background:var(--brand);color:#fff}
  .faq-item[open] .faq-icon::before{content:"−"}
  .faq-answer{padding:0 0 22px;font-size:15px;line-height:1.85;color:var(--muted);max-width:660px}
  .faq-answer a{color:var(--brand);font-weight:600}
  .faq-answer a:hover{text-decoration:underline}

  /* ---------- CTA ---------- */
  .cta-panel{
    background:var(--brand-soft);border:1px solid #D3E2FF;border-radius:var(--r-panel);
    padding:44px 48px;display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center;
  }
  .cta-panel h2{font-size:clamp(23px,2.5vw,29px);line-height:1.35;font-weight:700;margin-bottom:12px}
  .cta-panel p{font-size:15.5px;color:#3C5480;line-height:1.85;margin-bottom:18px}
  .cta-points{display:flex;flex-direction:column;gap:9px}
  .cta-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:#33475F}
  .cta-points li::before{
    content:"";flex:0 0 auto;width:18px;height:18px;border-radius:50%;
    background:#fff;border:1px solid #C7D9FF;margin-top:4px;
    background-image:linear-gradient(var(--brand),var(--brand));
    background-size:8px 2px;background-repeat:no-repeat;background-position:center;
  }
  .cta-side{display:flex;flex-direction:column;gap:12px;align-items:stretch}
  .cta-side .btn{width:100%}
  .cta-side small{font-size:13px;color:#4C6693;text-align:center;line-height:1.7}

  /* ---------- 页脚 ---------- */
  .site-footer{background:#0E1B2E;color:#C5D3E6;padding:56px 0 26px;margin-top:0}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.35fr;gap:40px;padding-bottom:36px}
  .footer-brand .brand-name{color:#fff;font-size:17px;margin-bottom:14px}
  .footer-brand p{font-size:14px;line-height:1.85;color:#9AB0CC;max-width:320px}
  .footer-col h3{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.02em}
  .footer-col ul{display:flex;flex-direction:column;gap:11px}
  .footer-col a{font-size:15px;color:#B4C5DC;transition:color .18s ease}
  .footer-col a:hover{color:#fff}
  .footer-contact li{font-size:13.5px;line-height:1.8;color:#9AB0CC}
  .footer-contact strong{color:#D3DFEF;font-weight:600}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.1);padding-top:22px;
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:#8C9FBB;
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1279px){
    .wrap{padding:0 26px}
    .hero{gap:38px}
    .faq-wrap{gap:34px}
  }
  @media (max-width:1023px){
    .sidebar{display:none}
    .mobile-topbar{display:flex}
    .page-shell{margin-left:0;padding-top:64px}
    .crumb{padding-top:20px}
    .hero{grid-template-columns:1fr;gap:30px;padding:28px 0 56px}
    .hero-media{order:2}
    .hero-media img{aspect-ratio:16/10;max-height:300px}
    .hero-sub{max-width:none}
    .section{padding:52px 0}
    .tip-grid{grid-template-columns:repeat(2,1fr)}
    .faq-wrap{grid-template-columns:1fr;gap:24px}
    .cta-panel{grid-template-columns:1fr;gap:26px;padding:32px 28px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  }
  @media (max-width:767px){
    .wrap{padding:0 20px}
    .hero-title{font-size:30px}
    .hero-actions{width:100%}
    .hero-actions .btn{flex:1 1 auto}
    .hero-media img{aspect-ratio:4/3;max-height:280px}
    .step{grid-template-columns:44px 1fr;gap:14px;padding-bottom:20px}
    .step-num{width:44px;height:44px;border-radius:13px;font-size:16px}
    .step:not(:last-child)::before{left:21px;top:46px}
    .step-card{padding:20px}
    .step-card h3{font-size:17px}
    .tip-grid{grid-template-columns:1fr}
    .faq-list{padding:4px 18px}
    .faq-item summary{font-size:15.5px;padding:18px 0;gap:12px}
    .cta-panel{padding:26px 20px;border-radius:var(--r-card)}
    .notice{flex-direction:row;padding:18px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
    .footer-brand{grid-column:1 / -1}
    .footer-bottom{flex-direction:column;gap:8px}
  }
  @media (max-width:520px){
    .hero-title{font-size:27px}
    .hero-actions{flex-direction:column}
    .hero-actions .btn{width:100%}
    .media-badge{left:12px;bottom:12px;font-size:12px;padding:7px 13px}
    .media-caption{right:12px;top:12px;font-size:11px}
    .footer-grid{grid-template-columns:1fr}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important}
    html{scroll-behavior:auto}
  }

/* roulang page: category2 */
:root{
    --brand:#2F6BFF;
    --brand-deep:#1E4FD8;
    --brand-soft:#EAF1FF;
    --ink:#13233A;
    --muted:#5B6B80;
    --bg:#F6F9FD;
    --surface:#FFFFFF;
    --surface-2:#EEF4FC;
    --line:#DDE8F5;
    --teal:#0F8B8D;
    --coral:#FF7A59;
    --ok:#1F9D72;
    --warn:#E58A1F;
    --err:#D94C4C;
    --r-sm:12px;
    --r-md:16px;
    --r-lg:24px;
    --sh-card:0 8px 28px rgba(21,49,92,.08);
    --sh-hover:0 14px 36px rgba(21,49,92,.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","Noto Sans CJK SC",system-ui,sans-serif;
    background:var(--bg);
    color:var(--ink);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%}
  a{color:inherit;text-decoration:none}
  button,input,select,textarea{font:inherit;color:inherit}
  h1,h2,h3,h4,p,ul,ol,dl,dd{margin:0}
  ul,ol{padding:0;list-style:none}
  :focus-visible{outline:3px solid rgba(47,107,255,.28);outline-offset:2px;border-radius:6px}

  .shell{max-width:1440px;margin:0 auto;position:relative}

  /* ---------- 侧栏 ---------- */
  .sidebar{
    position:fixed;top:0;left:0;width:248px;height:100vh;
    background:var(--surface);border-right:1px solid var(--line);
    padding:26px 18px 22px;display:flex;flex-direction:column;gap:22px;
    overflow-y:auto;z-index:60;
  }
  .brand-link{display:block}
  .brand-name{
    display:block;font-size:19px;font-weight:700;letter-spacing:.2px;color:var(--ink);line-height:1.35;
  }
  .brand-sub{display:block;font-size:12px;color:var(--muted);margin-top:6px;letter-spacing:.6px}
  .nav-group{display:flex;flex-direction:column;gap:4px}
  .nav-label{font-size:12px;color:#93A3B8;letter-spacing:2px;padding:0 12px 8px}
  .nav-link{
    position:relative;display:flex;align-items:center;gap:10px;
    padding:11px 12px;border-radius:10px;font-size:15px;color:var(--muted);
    transition:background .18s ease,color .18s ease;
  }
  .nav-dot{width:6px;height:6px;border-radius:999px;background:#C6D5E8;flex:0 0 6px;transition:background .18s ease}
  .nav-link:hover{background:var(--brand-soft);color:var(--ink)}
  .nav-link:hover .nav-dot{background:var(--brand)}
  .nav-link.active{background:var(--brand-soft);color:var(--ink);font-weight:600}
  .nav-link.active::before{
    content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:3px;background:var(--brand);
  }
  .nav-link.active .nav-dot{background:var(--brand)}
  .help-card{
    margin-top:auto;background:var(--brand-soft);border:1px solid #D5E3FF;border-radius:var(--r-md);
    padding:16px;display:flex;flex-direction:column;gap:10px;
  }
  .help-title{font-size:14px;font-weight:700;color:var(--ink);line-height:1.5}
  .help-text{font-size:12.5px;color:#5C7398;line-height:1.75}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:13px 22px;border-radius:var(--r-sm);font-size:15px;font-weight:600;
    border:1px solid transparent;cursor:pointer;transition:transform .16s ease,background .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease;
    white-space:nowrap;
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(47,107,255,.24)}
  .btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:0 12px 26px rgba(47,107,255,.28)}
  .btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px rgba(47,107,255,.22)}
  .btn-ghost{background:#fff;color:var(--brand);border-color:#BFD4FF}
  .btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand);transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-sm{padding:9px 16px;font-size:13.5px;border-radius:10px}
  .btn-block{width:100%}

  .link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:14.5px;transition:color .18s ease,gap .18s ease}
  .link-arrow:hover{color:var(--brand-deep);gap:11px;text-decoration:underline;text-underline-offset:4px}

  /* ---------- 内容区 ---------- */
  .content{margin-left:248px;min-height:100vh;display:flex;flex-direction:column}
  .wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
  .section{padding:56px 0}
  .section-tight{padding:36px 0}

  /* ---------- 移动端顶栏 ---------- */
  .mobile-bar{display:none}
  .drawer-mask{position:fixed;inset:0;background:rgba(15,30,51,.42);z-index:55;opacity:0;pointer-events:none;transition:opacity .25s ease}
  .drawer-mask.show{opacity:1;pointer-events:auto}

  /* ---------- 倒计时 ---------- */
  .countdown-bar{
    margin-top:24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
    padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:18px;
    box-shadow:0 4px 16px rgba(21,49,92,.05);
  }
  .cd-left{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;color:var(--ink)}
  .cd-dot{width:8px;height:8px;border-radius:999px;background:var(--coral);flex:0 0 8px}
  .cd-right{display:flex;align-items:center;gap:8px}
  .cd-cell{display:flex;align-items:baseline;gap:4px;background:var(--surface-2);border-radius:10px;padding:6px 12px}
  .cd-num{
    font-family:"DIN Alternate","Bahnschrift","PingFang SC",monospace;
    font-variant-numeric:tabular-nums;font-size:20px;font-weight:700;color:var(--brand-deep);line-height:1.2;
  }
  .cd-unit{font-size:12px;color:var(--muted)}
  .cd-ended{font-size:14px;color:var(--muted)}

  /* ---------- 面包屑 ---------- */
  .crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13.5px;color:#8B9CB3;padding-top:18px}
  .crumbs a{color:#8B9CB3}
  .crumbs a:hover{color:var(--brand)}
  .crumbs .sep{color:#C4D2E3}
  .crumbs .now{color:var(--ink);font-weight:600}

  /* ---------- Hero ---------- */
  .cat-hero{display:grid;grid-template-columns:1.08fr .92fr;gap:44px;align-items:center;padding:34px 0 8px}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
    color:var(--brand-deep);font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;margin-bottom:18px;
  }
  .eyebrow i{width:6px;height:6px;border-radius:999px;background:var(--teal);display:inline-block}
  .hero-title{font-size:clamp(30px,3.6vw,46px);line-height:1.22;font-weight:700;letter-spacing:-.4px}
  .hero-title em{font-style:normal;color:var(--brand)}
  .hero-sub{margin-top:18px;font-size:16.5px;color:var(--muted);max-width:560px}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
  .hero-facts{display:flex;flex-wrap:wrap;gap:26px;margin-top:32px;padding-top:24px;border-top:1px dashed var(--line)}
  .fact-num{font-family:"DIN Alternate","Bahnschrift",monospace;font-variant-numeric:tabular-nums;font-size:24px;font-weight:700;color:var(--ink);line-height:1.2}
  .fact-label{font-size:13px;color:var(--muted);margin-top:2px}
  .hero-media{position:relative;border-radius:20px;overflow:hidden;box-shadow:var(--sh-card);border:1px solid var(--line)}
  .hero-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11}
  .hero-badge{
    position:absolute;left:16px;bottom:16px;background:var(--brand);color:#fff;
    font-size:13px;font-weight:600;padding:8px 14px;border-radius:999px;letter-spacing:.4px;
  }

  /* ---------- 通用卡片 ---------- */
  .panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-card)}
  .panel-body{padding:24px}
  .badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:4px 11px;border-radius:999px;background:var(--brand-soft);color:var(--brand-deep);letter-spacing:.3px}
  .badge-teal{background:#E4F5F5;color:#0B6E70}
  .badge-coral{background:#FFEDE8;color:#C94A2B}
  .badge-warn{background:#FCF1DE;color:#9A6410}

  /* ---------- 区块标题 ---------- */
  .sec-head{margin-bottom:28px;display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap}
  .sec-title{font-size:clamp(24px,2.4vw,30px);font-weight:700;line-height:1.3;letter-spacing:-.2px}
  .sec-desc{margin-top:10px;color:var(--muted);font-size:15px;max-width:640px}

  /* ---------- 活动卡 ---------- */
  .campaign-feature{
    display:grid;grid-template-columns:1.02fr 1fr;gap:0;overflow:hidden;border-radius:var(--r-lg);
    background:var(--surface);border:1px solid var(--line);box-shadow:var(--sh-card);
    transition:box-shadow .22s ease,border-color .22s ease;
  }
  .campaign-feature:hover{box-shadow:var(--sh-hover);border-color:rgba(47,107,255,.32)}
  .cf-media{position:relative;min-height:320px;overflow:hidden}
  .cf-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
  .campaign-feature:hover .cf-media img{transform:scale(1.03)}
  .cf-tag{position:absolute;top:16px;left:16px;background:#fff;color:var(--brand-deep);font-size:12.5px;font-weight:700;padding:6px 14px;border-radius:999px;box-shadow:0 4px 14px rgba(21,49,92,.14)}
  .cf-body{padding:32px;display:flex;flex-direction:column;gap:14px;justify-content:center}
  .cf-title{font-size:23px;font-weight:700;line-height:1.4}
  .cf-text{color:var(--muted);font-size:15px}
  .cf-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:6px;padding-top:18px;border-top:1px solid var(--line)}
  .cf-meta dt{font-size:12px;color:#93A3B8;margin-bottom:3px}
  .cf-meta dd{font-size:14px;font-weight:600;color:var(--ink);line-height:1.5}
  .cf-foot{display:flex;align-items:center;gap:16px;margin-top:16px;flex-wrap:wrap}

  .campaign-rows{display:grid;gap:18px;margin-top:20px}
  .campaign-row{
    display:grid;grid-template-columns:190px 1fr;gap:24px;align-items:center;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
    padding:16px;box-shadow:0 6px 20px rgba(21,49,92,.06);
    transition:box-shadow .22s ease,border-color .22s ease,transform .22s ease;
  }
  .campaign-row:hover{box-shadow:var(--sh-hover);border-color:rgba(47,107,255,.3);transform:translateY(-2px)}
  .cr-media{border-radius:12px;overflow:hidden;aspect-ratio:16/10}
  .cr-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
  .campaign-row:hover .cr-media img{transform:scale(1.04)}
  .cr-body{display:flex;flex-direction:column;gap:8px;padding-right:8px}
  .cr-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
  .cr-title{font-size:18px;font-weight:700;line-height:1.45}
  .cr-text{font-size:14.5px;color:var(--muted)}
  .cr-line{display:flex;flex-wrap:wrap;gap:18px;margin-top:4px;font-size:13px;color:#7E8FA6}
  .cr-line strong{color:var(--ink);font-weight:600}

  /* ---------- 规则摘要 ---------- */
  .rules-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:48px;align-items:start}
  .rules-side{position:sticky;top:28px;display:flex;flex-direction:column;gap:16px}
  .rules-list{display:grid;gap:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-card)}
  .rule-item{display:grid;grid-template-columns:52px 1fr;gap:16px;padding:22px 24px;border-bottom:1px solid var(--line)}
  .rule-item:last-child{border-bottom:0}
  .rule-num{
    width:40px;height:40px;border-radius:12px;background:var(--brand-soft);color:var(--brand-deep);
    display:grid;place-items:center;font-weight:700;font-size:15px;font-variant-numeric:tabular-nums;
  }
  .rule-name{font-size:16.5px;font-weight:700;margin-bottom:6px}
  .rule-text{font-size:14.5px;color:var(--muted)}

  /* ---------- CTA ---------- */
  .cta-panel{
    background:linear-gradient(180deg,#FFFFFF 0%,#F4F8FF 100%);
    border:1px solid #D5E3FF;border-radius:var(--r-lg);padding:38px;
    display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;
    box-shadow:var(--sh-card);
  }
  .cta-title{font-size:clamp(22px,2.3vw,28px);font-weight:700;line-height:1.35}
  .cta-text{margin-top:12px;color:var(--muted);font-size:15px}
  .cta-points{display:grid;gap:12px}
  .cta-point{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px}
  .cta-point .tick{
    width:20px;height:20px;flex:0 0 20px;border-radius:999px;background:#E4F5F5;color:#0B6E70;
    display:grid;place-items:center;font-size:12px;font-weight:700;margin-top:2px;
  }
  .cta-point p{font-size:14px;color:var(--muted);line-height:1.7}
  .cta-point strong{color:var(--ink);font-weight:600}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}

  /* ---------- FAQ ---------- */
  .faq-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}
  .faq-aside{display:flex;flex-direction:column;gap:14px}
  .faq-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-card)}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item:last-child{border-bottom:0}
  .faq-item summary{
    display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:20px 24px;cursor:pointer;font-size:16.5px;font-weight:600;color:var(--ink);
    list-style:none;transition:background .18s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary:hover{background:rgba(234,241,255,.6)}
  .faq-icon{position:relative;width:28px;height:28px;flex:0 0 28px;border-radius:999px;background:var(--brand-soft)}
  .faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px}
  .faq-icon::before{width:12px;height:2px;transform:translate(-50%,-50%)}
  .faq-icon::after{width:2px;height:12px;transform:translate(-50%,-50%);transition:transform .2s ease,opacity .2s ease}
  .faq-item[open] .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
  .faq-answer{padding:0 24px 22px;font-size:15px;line-height:1.85;color:var(--muted)}

  /* ---------- 页脚 ---------- */
  .site-footer{background:#13233A;color:#B9C8DB;margin-top:auto}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.25fr;gap:40px;padding:56px 0 40px}
  .footer-brand .brand-name{color:#fff;font-size:19px}
  .footer-brand p{margin-top:14px;font-size:14px;line-height:1.85;color:#93A6BF;max-width:320px}
  .footer-col h3{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.4px}
  .footer-col li{margin-bottom:11px}
  .footer-col a{font-size:15px;color:#9FB2CA;transition:color .18s ease}
  .footer-col a:hover{color:#fff}
  .footer-contact li{font-size:13.5px;line-height:1.8;color:#93A6BF;margin-bottom:10px}
  .footer-contact strong{color:#C9D9EC;font-weight:600}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.1);padding:20px 0 28px;
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:#8298B3;
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1279px){
    .rules-grid,.faq-grid{gap:34px}
    .cta-panel{padding:30px;gap:28px}
  }
  @media (max-width:1023px){
    .sidebar{
      transform:translateX(-100%);transition:transform .28s ease;width:280px;
      box-shadow:0 20px 50px rgba(15,30,51,.22);
    }
    .sidebar.open{transform:translateX(0)}
    .content{margin-left:0;padding-top:64px}
    .mobile-bar{
      display:flex;align-items:center;justify-content:space-between;
      position:fixed;top:0;left:0;right:0;height:64px;padding:0 20px;
      background:#fff;border-bottom:1px solid var(--line);z-index:70;
    }
    .mobile-bar .brand-name{font-size:16px}
    .menu-btn{
      display:inline-flex;align-items:center;gap:8px;background:var(--brand-soft);color:var(--brand-deep);
      border:1px solid #D5E3FF;border-radius:10px;padding:8px 14px;font-size:14px;font-weight:600;cursor:pointer;
      transition:background .18s ease;
    }
    .menu-btn:hover{background:#DCE8FF}
    .wrap{padding:0 24px}
    .cat-hero{grid-template-columns:1fr;gap:28px;padding-top:24px}
    .hero-media{order:2}
    .hero-media img{aspect-ratio:16/10}
    .hero-facts{gap:20px}
    .campaign-feature{grid-template-columns:1fr}
    .cf-media{min-height:220px}
    .rules-grid,.faq-grid,.cta-panel{grid-template-columns:1fr}
    .rules-side{position:static}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:44px 0 32px}
  }
  @media (max-width:767px){
    body{font-size:15.5px}
    .wrap{padding:0 20px}
    .section{padding:42px 0}
    .section-tight{padding:28px 0}
    .countdown-bar{flex-direction:column;align-items:flex-start;gap:12px}
    .cd-right{width:100%;justify-content:space-between;gap:6px}
    .cd-cell{flex:1;justify-content:center;padding:6px 8px}
    .cd-num{font-size:17px}
    .campaign-row{grid-template-columns:1fr;gap:14px}
    .cr-media{aspect-ratio:16/9}
    .cf-body{padding:22px}
    .cf-meta{grid-template-columns:1fr;gap:10px}
    .rule-item{grid-template-columns:44px 1fr;padding:18px}
    .rule-num{width:36px;height:36px;font-size:14px}
    .cta-panel{padding:24px}
    .footer-bottom{flex-direction:column;gap:8px}
    .hero-actions .btn{width:100%}
    .cta-actions .btn{width:100%}
  }
  @media (max-width:520px){
    .hero-facts{flex-direction:column;gap:14px}
    .footer-grid{grid-template-columns:1fr;gap:26px}
    .faq-item summary{padding:16px 18px;font-size:15.5px}
    .faq-answer{padding:0 18px 18px}
  }

/* roulang page: category3 */
:root{
    --primary:#2F6BFF;
    --primary-dark:#1E4FD8;
    --primary-light:#EAF1FF;
    --ink:#13233A;
    --muted:#5B6B80;
    --bg:#F6F9FD;
    --surface:#FFFFFF;
    --surface-2:#EEF4FC;
    --line:#DDE8F5;
    --teal:#0F8B8D;
    --coral:#FF7A59;
    --success:#1F9D72;
    --warn:#E58A1F;
    --err:#D94C4C;
    --r-sm:12px;
    --r-md:16px;
    --r-lg:24px;
    --shadow-card:0 8px 28px rgba(21,49,92,.08);
    --shadow-card-hover:0 14px 36px rgba(21,49,92,.12);
    --sidebar-w:248px;
    --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
    --font-num:"DIN Alternate","Bahnschrift","SFMono-Regular",Consolas,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;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease;}
  img{display:block;max-width:100%;height:auto;}
  button{font-family:inherit;}
  :focus-visible{outline:3px solid rgba(47,107,255,.28);outline-offset:2px;border-radius:6px;}

  /* ---------- 布局骨架 ---------- */
  .sidebar{
    position:fixed;top:0;left:0;z-index:40;
    width:var(--sidebar-w);height:100vh;
    background:var(--surface);
    border-right:1px solid var(--line);
    padding:26px 18px 22px;
    display:flex;flex-direction:column;
    overflow-y:auto;
  }
  .main-area{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;}
  .wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 32px;}

  /* ---------- 侧栏品牌 ---------- */
  .brand{display:flex;align-items:flex-start;gap:10px;padding:0 8px 22px;border-bottom:1px solid var(--line);}
  .brand-mark{
    width:38px;height:38px;flex:0 0 38px;border-radius:11px;
    background:linear-gradient(160deg,var(--primary),#5C8CFF);
    color:#fff;font-weight:700;font-size:16px;
    display:flex;align-items:center;justify-content:center;
    letter-spacing:.5px;box-shadow:0 6px 16px rgba(47,107,255,.28);
  }
  .brand-name{font-size:16px;font-weight:700;line-height:1.35;color:var(--ink);letter-spacing:.2px;}
  .brand-sub{font-size:12px;color:var(--muted);line-height:1.5;margin-top:2px;}

  /* ---------- 导航 ---------- */
  .nav-group{display:flex;flex-direction:column;gap:4px;padding-top:20px;flex:1 1 auto;}
  .nav-label{font-size:12px;color:#93A3B8;letter-spacing:2px;padding:0 10px 8px;font-weight:600;}
  .nav-link{
    position:relative;
    display:flex;align-items:center;gap:10px;
    height:44px;padding:0 12px 0 14px;
    border-radius:10px;
    font-size:15px;color:#3D4E66;font-weight:500;
  }
  .nav-dot{width:6px;height:6px;border-radius:50%;background:#C7D6EA;flex:0 0 6px;transition:background-color .18s ease;}
  .nav-link:hover{background:var(--primary-light);color:var(--primary-dark);}
  .nav-link:hover .nav-dot{background:var(--primary);}
  .nav-link.active{background:var(--primary-light);color:var(--primary-dark);font-weight:700;}
  .nav-link.active .nav-dot{background:var(--primary);}
  .nav-link.active::before{
    content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
    width:3px;height:22px;border-radius:3px;background:var(--primary);
  }
  .help-card{
    margin-top:22px;background:var(--primary-light);border-radius:var(--r-md);
    padding:16px;border:1px solid #D6E4FF;
  }
  .help-card h3{font-size:14px;font-weight:700;margin:0 0 6px;color:var(--ink);}
  .help-card p{font-size:12.5px;line-height:1.7;color:var(--muted);margin:0 0 12px;}
  .help-card a{
    display:block;text-align:center;background:var(--primary);color:#fff;
    font-size:13px;font-weight:600;border-radius:10px;padding:9px 10px;
    transition:background-color .18s ease,transform .18s ease;
  }
  .help-card a:hover{background:var(--primary-dark);transform:translateY(-1px);}

  /* ---------- 移动端顶栏与抽屉 ---------- */
  .mobile-bar{display:none;}
  .drawer,.drawer-mask{display:none;}

  /* ---------- 面包屑 ---------- */
  .breadcrumb{padding:24px 0 0;font-size:13.5px;color:var(--muted);display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
  .breadcrumb a{color:var(--muted);}
  .breadcrumb a:hover{color:var(--primary);}
  .breadcrumb .sep{color:#B8C7DB;}
  .breadcrumb .current{color:var(--ink);font-weight:600;}

  /* ---------- Hero ---------- */
  .hero{padding:28px 0 8px;}
  .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--surface);border:1px solid var(--line);
    color:var(--primary-dark);font-size:13px;font-weight:600;
    padding:6px 14px;border-radius:999px;box-shadow:0 4px 14px rgba(21,49,92,.05);
  }
  .eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--coral);display:inline-block;}
  .hero h1{
    font-size:clamp(32px,3.6vw,44px);
    line-height:1.25;font-weight:700;letter-spacing:-.5px;
    margin:18px 0 16px;color:var(--ink);
  }
  .hero h1 .hl{color:var(--primary);}
  .hero-sub{font-size:16.5px;line-height:1.9;color:var(--muted);max-width:560px;margin:0 0 26px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
  .hero-figure{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-card);}
  .hero-figure img{width:100%;aspect-ratio:16/11;object-fit:cover;}
  .hero-badge{
    position:absolute;left:16px;bottom:16px;
    background:var(--primary);color:#fff;
    font-size:12.5px;font-weight:600;letter-spacing:.5px;
    padding:7px 14px;border-radius:999px;
    box-shadow:0 6px 18px rgba(30,79,216,.35);
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:var(--r-sm);
    font-size:15px;font-weight:600;border:1px solid transparent;
    cursor:pointer;transition:all .18s ease;white-space:nowrap;
  }
  .btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(47,107,255,.24);}
  .btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 12px 26px rgba(30,79,216,.3);}
  .btn-primary:active{transform:none;box-shadow:0 6px 16px rgba(47,107,255,.22);}
  .btn-ghost{background:var(--surface);color:var(--primary-dark);border-color:#C6D9FF;}
  .btn-ghost:hover{background:var(--primary-light);border-color:var(--primary);}
  .btn-ghost:active{background:#DFE9FF;}
  .btn-sm{height:40px;padding:0 18px;font-size:14px;}
  .link-arrow{color:var(--primary);font-weight:600;font-size:14.5px;display:inline-flex;align-items:center;gap:6px;}
  .link-arrow svg{transition:transform .18s ease;}
  .link-arrow:hover{color:var(--primary-dark);text-decoration:underline;}
  .link-arrow:hover svg{transform:translateX(3px);}

  /* ---------- 锚点 chips ---------- */
  .chips{display:flex;flex-wrap:wrap;gap:10px;margin:6px 0 0;}
  .chip{
    display:inline-flex;align-items:center;gap:7px;
    height:38px;padding:0 16px;border-radius:999px;
    background:var(--surface);border:1px solid var(--line);
    color:#3D4E66;font-size:14px;font-weight:600;
    transition:all .18s ease;
  }
  .chip i{width:6px;height:6px;border-radius:50%;background:#C7D6EA;}
  .chip:hover{border-color:#B9CEFF;color:var(--primary-dark);background:#F4F8FF;}
  .chip.is-on{background:var(--primary-light);border-color:#B9CEFF;color:var(--primary-dark);}
  .chip.is-on i{background:var(--primary);}

  /* ---------- 板块 ---------- */
  .section{padding:64px 0 0;}
  .section-head{margin-bottom:28px;}
  .section-head h2{font-size:clamp(24px,2.4vw,30px);line-height:1.35;font-weight:700;margin:0 0 10px;letter-spacing:-.3px;}
  .section-head p{margin:0;color:var(--muted);font-size:15.5px;max-width:720px;}

  /* ---------- 功能矩阵 ---------- */
  .matrix{display:flex;flex-direction:column;gap:24px;}
  .matrix-row{display:grid;grid-template-columns:1fr 1fr;gap:24px;scroll-margin-top:24px;}
  .feature-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
    padding:26px 24px;box-shadow:var(--shadow-card);
    transition:all .2s ease;display:flex;flex-direction:column;gap:14px;
  }
  .feature-card:hover{box-shadow:var(--shadow-card-hover);border-color:rgba(47,107,255,.3);transform:translateY(-2px);}
  .feature-icon{
    width:46px;height:46px;border-radius:13px;background:var(--primary-light);
    display:flex;align-items:center;justify-content:center;color:var(--primary-dark);
    flex:0 0 46px;
  }
  .feature-card h3{font-size:19px;font-weight:700;margin:0;line-height:1.45;}
  .feature-card p{margin:0;color:var(--muted);font-size:15px;line-height:1.85;}
  .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:4px;}
  .tag{
    display:inline-flex;align-items:center;
    font-size:12.5px;font-weight:600;color:var(--primary-dark);
    background:var(--primary-light);border-radius:999px;padding:4px 12px;
    line-height:1.6;
  }
  .tag.teal{color:#0B7072;background:#E3F4F4;}
  .tag.coral{color:#B84A2C;background:#FFEFEA;}
  .row-flag{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;font-weight:700;letter-spacing:1.5px;color:#93A3B8;
    margin-bottom:-8px;
  }
  .row-flag span{width:22px;height:2px;background:#CBDCF4;border-radius:2px;display:inline-block;}

  /* ---------- 提示条 ---------- */
  .notice{
    margin-top:32px;background:var(--primary-light);border:1px solid #D6E4FF;
    border-radius:var(--r-md);padding:20px 24px;
    display:flex;gap:14px;align-items:flex-start;
  }
  .notice-icon{
    width:30px;height:30px;flex:0 0 30px;border-radius:50%;
    background:#fff;color:var(--primary-dark);display:flex;align-items:center;justify-content:center;
    border:1px solid #C6D9FF;
  }
  .notice p{margin:0;font-size:14.5px;line-height:1.85;color:#2A4165;}
  .notice strong{color:var(--primary-dark);}

  /* ---------- 使用流程 ---------- */
  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
  .step{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
    padding:24px;box-shadow:var(--shadow-card);position:relative;
    transition:all .2s ease;
  }
  .step:hover{border-color:rgba(47,107,255,.3);box-shadow:var(--shadow-card-hover);}
  .step-no{
    font-family:var(--font-num);font-size:13px;font-weight:700;letter-spacing:1px;
    color:var(--primary);background:var(--primary-light);border-radius:8px;
    display:inline-flex;align-items:center;justify-content:center;
    padding:3px 10px;margin-bottom:14px;
  }
  .step h3{font-size:18px;font-weight:700;margin:0 0 8px;}
  .step p{margin:0;font-size:14.5px;color:var(--muted);line-height:1.85;}

  /* ---------- FAQ ---------- */
  .faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:44px;align-items:start;}
  .faq-aside h2{font-size:clamp(24px,2.4vw,30px);font-weight:700;margin:0 0 12px;line-height:1.35;}
  .faq-aside p{margin:0 0 18px;color:var(--muted);font-size:15px;}
  .faq-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-card);overflow:hidden;}
  .faq-item + .faq-item{border-top:1px solid var(--line);}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 24px;font-size:16.5px;font-weight:600;color:var(--ink);
    transition:background-color .18s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:hover{background:#F4F8FF;}
  .faq-sign{
    width:26px;height:26px;flex:0 0 26px;border-radius:50%;
    background:var(--primary-light);color:var(--primary-dark);
    display:flex;align-items:center;justify-content:center;
    font-size:17px;font-weight:600;line-height:1;transition:transform .2s ease,background-color .2s ease;
  }
  .faq-item[open] summary{color:var(--primary-dark);background:#F4F8FF;}
  .faq-item[open] .faq-sign{transform:rotate(45deg);background:#D6E4FF;}
  .faq-answer{padding:0 24px 22px;font-size:15px;line-height:1.9;color:var(--muted);}
  .faq-answer p{margin:0;}

  /* ---------- CTA ---------- */
  .cta-panel{
    margin-top:64px;background:var(--primary-light);border:1px solid #D6E4FF;
    border-radius:var(--r-lg);padding:40px 44px;
    display:grid;grid-template-columns:1.3fr .7fr;gap:32px;align-items:center;
  }
  .cta-panel h2{font-size:clamp(22px,2.2vw,28px);font-weight:700;margin:0 0 12px;line-height:1.35;}
  .cta-panel p{margin:0;color:#3D4E66;font-size:15.5px;line-height:1.85;max-width:620px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;}

  /* ---------- 页脚 ---------- */
  .site-footer{margin-top:72px;background:#0E1B2E;color:#C9D6E8;padding:56px 0 0;}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;}
  .footer-brand .brand-name{color:#fff;font-size:18px;font-weight:700;margin-bottom:12px;letter-spacing:.3px;}
  .footer-brand p{margin:0;font-size:14px;line-height:1.9;color:#93A6BF;max-width:320px;}
  .footer-col h3{font-size:14px;font-weight:600;color:#fff;margin:0 0 14px;letter-spacing:.5px;}
  .footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
  .footer-col a{font-size:14.5px;color:#A9BBD2;}
  .footer-col a:hover{color:#fff;}
  .footer-contact li{font-size:14px;line-height:1.8;color:#93A6BF;}
  .footer-contact strong{color:#D5E1F0;font-weight:600;}
  .footer-bottom{
    margin-top:44px;border-top:1px solid rgba(255,255,255,.1);
    padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:10px 24px;
    justify-content:space-between;font-size:13px;color:#7E92AC;
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1279px){
    .wrap{padding:0 26px;}
    .hero-grid{gap:32px;}
    .cta-panel{grid-template-columns:1fr;gap:24px;}
    .cta-actions{justify-content:flex-start;}
  }
  @media (max-width:1023px){
    .sidebar{display:none;}
    .main-area{margin-left:0;padding-top:64px;}
    .mobile-bar{
      display:flex;align-items:center;justify-content:space-between;
      position:fixed;top:0;left:0;right:0;height:64px;z-index:50;
      background:var(--surface);border-bottom:1px solid var(--line);
      padding:0 20px;box-shadow:0 2px 12px rgba(21,49,92,.05);
    }
    .mobile-bar .brand-name{font-size:15px;}
    .mobile-bar .brand-sub{font-size:11px;}
    .menu-btn{
      width:42px;height:42px;border-radius:11px;border:1px solid var(--line);
      background:var(--surface);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
      cursor:pointer;
    }
    .menu-btn span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;}
    .drawer-mask{
      display:block;position:fixed;inset:0;z-index:60;background:rgba(15,27,46,.45);
      opacity:0;pointer-events:none;transition:opacity .25s ease;
    }
    .drawer-mask.on{opacity:1;pointer-events:auto;}
    .drawer{
      display:flex;flex-direction:column;
      position:fixed;top:0;left:0;bottom:0;width:290px;max-width:86vw;z-index:61;
      background:var(--surface);padding:20px 16px;overflow-y:auto;
      transform:translateX(-100%);transition:transform .28s ease;
      box-shadow:14px 0 40px rgba(15,27,46,.16);
    }
    .drawer.on{transform:translateX(0);}
    .drawer-close{
      align-self:flex-end;width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
      background:var(--surface-2);color:var(--ink);font-size:18px;line-height:1;
      display:flex;align-items:center;justify-content:center;cursor:pointer;margin-bottom:10px;
    }
    .drawer .nav-link{height:48px;}
    .faq-layout{grid-template-columns:1fr;gap:24px;}
    .hero-grid{grid-template-columns:1fr;}
    .hero-figure{order:-1;}
    .hero-figure img{aspect-ratio:16/9;}
    .hero-sub{max-width:none;}
  }
  @media (max-width:767px){
    .wrap{padding:0 20px;}
    .section{padding:44px 0 0;}
    .matrix-row{grid-template-columns:1fr;gap:18px;}
    .steps{grid-template-columns:1fr;}
    .hero-actions .btn{width:100%;}
    .hero-actions{flex-direction:column;}
    .cta-panel{padding:28px 22px;margin-top:44px;}
    .cta-actions{flex-direction:column;}
    .cta-actions .btn{width:100%;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
    .footer-brand{grid-column:1 / -1;}
    .site-footer{margin-top:52px;padding-top:40px;}
    .feature-card{padding:22px 20px;}
    .faq-item summary{padding:16px 18px;font-size:15.5px;}
    .faq-answer{padding:0 18px 18px;font-size:14.5px;}
    .notice{padding:16px 18px;}
  }
  @media (max-width:519px){
    .hero h1{font-size:29px;}
    .footer-grid{grid-template-columns:1fr;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
  }

/* roulang page: category4 */
:root{
    --brand:#2F6BFF;
    --brand-deep:#1E4FD8;
    --brand-soft:#EAF1FF;
    --ink:#13233A;
    --muted:#5B6B80;
    --bg:#F6F9FD;
    --surface:#FFFFFF;
    --surface-soft:#EEF4FC;
    --line:#DDE8F5;
    --teal:#0F8B8D;
    --coral:#FF7A59;
    --success:#1F9D72;
    --warn:#E58A1F;
    --danger:#D94C4C;
    --r-card:16px;
    --r-panel:24px;
    --r-btn:12px;
    --shadow-card:0 8px 28px rgba(21,49,92,.08);
    --shadow-hover:0 14px 36px rgba(21,49,92,.12);
    --aside-w:248px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  body.site-body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Hiragino Sans GB",sans-serif;
    background:var(--bg);
    color:var(--ink);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;}
  button{font-family:inherit;}
  .num{font-variant-numeric:tabular-nums;}

  .app-shell{display:flex;align-items:flex-start;min-height:100vh;max-width:1440px;margin:0 auto;}
  .wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}

  /* 左侧竖向导航 */
  .site-aside{
    position:sticky;top:0;align-self:flex-start;
    width:var(--aside-w);flex:0 0 var(--aside-w);
    height:100vh;overflow-y:auto;
    background:var(--surface);
    border-right:1px solid var(--line);
  }
  .aside-inner{display:flex;flex-direction:column;gap:26px;padding:26px 18px 26px;min-height:100%;}
  .brand-lockup{display:flex;align-items:center;gap:12px;padding:6px;border-radius:14px;text-decoration:none;}
  .brand-mark{
    position:relative;flex:0 0 40px;width:40px;height:40px;border-radius:12px;
    background:var(--brand);box-shadow:0 8px 20px rgba(47,107,255,.32);
  }
  .brand-mark::before{content:"";position:absolute;inset:11px;border:2px solid rgba(255,255,255,.92);border-radius:6px;}
  .brand-mark::after{content:"";position:absolute;left:50%;top:50%;width:6px;height:6px;border-radius:999px;background:#fff;transform:translate(-50%,-50%);}
  .brand-text{min-width:0;}
  .brand-name{display:block;font-size:15px;font-weight:700;line-height:1.35;color:var(--ink);letter-spacing:.1px;}
  .brand-sub{display:block;font-size:12px;color:var(--muted);letter-spacing:.4px;line-height:1.6;}

  .nav-group{display:flex;flex-direction:column;gap:4px;}
  .nav-label{font-size:12px;letter-spacing:.18em;color:#93A5BC;padding:0 10px 8px;}
  .nav-link{
    position:relative;display:flex;align-items:center;gap:10px;
    height:42px;padding:0 12px;border-radius:10px;
    font-size:15px;color:#42536B;text-decoration:none;
    transition:background .18s ease,color .18s ease;
  }
  .nav-link:hover{background:#F2F7FF;color:var(--brand-deep);}
  .nav-link.active{background:var(--brand-soft);color:var(--brand-deep);font-weight:600;}
  .nav-link.active::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:3px;background:var(--brand);}
  .nav-dot{flex:0 0 6px;width:6px;height:6px;border-radius:999px;background:#C6D6EA;transition:background .18s ease;}
  .nav-link:hover .nav-dot,.nav-link.active .nav-dot{background:var(--brand);}

  .aside-help{
    margin-top:auto;background:var(--brand-soft);border:1px solid #D8E5FF;
    border-radius:var(--r-card);padding:18px;display:flex;flex-direction:column;gap:10px;
  }
  .aside-help h3{margin:0;font-size:15px;font-weight:700;}
  .aside-help p{margin:0;font-size:13px;line-height:1.7;color:#54688A;}

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:46px;padding:0 22px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;text-decoration:none;border:1px solid transparent;
    cursor:pointer;transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(47,107,255,.24);}
  .btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);}
  .btn-primary:active{transform:translateY(0);}
  .btn-ghost{background:#fff;color:var(--brand);border-color:#BED4FF;}
  .btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep);}
  .btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px;}
  a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
    outline:3px solid rgba(47,107,255,.28);outline-offset:2px;border-radius:10px;
  }

  .content-shell{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;}
  main{flex:1 1 auto;padding:24px 0 76px;}

  /* 顶部提示条 */
  .notice-bar{
    display:flex;align-items:flex-start;gap:12px;
    background:#FFF7F4;border:1px solid #FFDCD1;color:#8A4326;
    border-radius:14px;padding:12px 18px;font-size:14px;line-height:1.7;
  }
  .notice-bar p{margin:0;}
  .notice-dot{flex:0 0 8px;width:8px;height:8px;border-radius:999px;background:var(--coral);margin-top:8px;box-shadow:0 0 0 4px rgba(255,122,89,.16);}

  /* 面包屑 */
  .crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:20px 0 0;font-size:13px;color:var(--muted);}
  .crumbs a{text-decoration:none;color:#5B6B80;}
  .crumbs a:hover{color:var(--brand);}
  .crumbs .sep{color:#B9C8DA;}
  .crumbs .current{color:var(--ink);font-weight:600;}

  /* 页头 */
  .page-head{padding:22px 0 6px;}
  .eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--brand-soft);color:var(--brand-deep);font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;}
  .page-title{
    margin:16px 0 0;font-size:clamp(30px,3.6vw,44px);line-height:1.22;
    font-weight:700;letter-spacing:-.5px;
  }
  .page-lead{max-width:830px;margin:14px 0 0;font-size:16.5px;line-height:1.85;color:var(--muted);}
  .chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;}
  .chip{display:inline-flex;align-items:center;gap:6px;font-size:13px;padding:6px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#42536B;}

  /* 卡片通用 */
  .card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card);}
  .card-pad{padding:26px 28px;}
  .card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:6px;}
  .card-title{margin:0;font-size:20px;font-weight:700;letter-spacing:-.2px;}
  .card-note{margin:0;font-size:13px;color:var(--muted);}

  /* 两栏主体 */
  .security-grid{display:grid;grid-template-columns:1fr;gap:24px;margin-top:36px;}
  @media (min-width:1024px){
    .security-grid{grid-template-columns:minmax(0,1.12fr) minmax(0,1fr);align-items:start;}
  }

  /* 检查清单 */
  .check-row{display:flex;align-items:flex-start;gap:14px;padding:16px 0;border-top:1px solid var(--line);}
  .check-row:first-of-type{border-top:none;padding-top:8px;}
  .check-box{
    appearance:none;-webkit-appearance:none;
    flex:0 0 22px;width:22px;height:22px;margin:3px 0 0;
    border:2px solid #C9DAEF;border-radius:7px;background:#fff;cursor:pointer;position:relative;
    transition:background .18s ease,border-color .18s ease,box-shadow .18s ease;
  }
  .check-box:hover{border-color:#9FBDF0;}
  .check-box:checked{background:var(--brand);border-color:var(--brand);}
  .check-box:checked::after{
    content:"";position:absolute;left:6px;top:2px;width:6px;height:11px;
    border:solid #fff;border-width:0 2px 2px 0;transform:rotate(42deg);
  }
  .check-text{min-width:0;}
  .check-text strong{display:block;font-size:15.5px;font-weight:600;line-height:1.6;}
  .check-text p{margin:3px 0 0;font-size:13.5px;line-height:1.75;color:var(--muted);}
  .check-meter{
    display:flex;align-items:center;gap:12px;margin-top:20px;padding:12px 16px;
    background:var(--surface-soft);border-radius:12px;font-size:13.5px;color:#42536B;
  }
  .check-meter span.num{white-space:nowrap;font-weight:600;color:var(--brand-deep);}
  .meter-track{flex:1 1 auto;height:6px;border-radius:999px;background:#DCE8F8;overflow:hidden;min-width:60px;}
  .meter-fill{height:100%;width:0;background:var(--brand);border-radius:999px;transition:width .3s ease;}

  /* FAQ 手风琴 */
  .faq-item{border-top:1px solid var(--line);}
  .faq-item:first-of-type{border-top:none;}
  .faq-item summary{
    display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
    padding:18px 4px;cursor:pointer;list-style:none;font-size:16.5px;font-weight:600;
    line-height:1.65;color:var(--ink);transition:background .18s ease;border-radius:10px;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:hover{background:rgba(234,241,255,.5);}
  .faq-icon{
    position:relative;flex:0 0 28px;width:28px;height:28px;border-radius:999px;
    background:var(--brand-soft);margin-top:2px;transition:background .18s ease;
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px;
    transform:translate(-50%,-50%);transition:opacity .2s ease,transform .2s ease;
  }
  .faq-icon::before{width:12px;height:2px;}
  .faq-icon::after{width:2px;height:12px;}
  .faq-item[open] .faq-icon::after{opacity:0;transform:translate(-50%,-50%) rotate(90deg);}
  .faq-item[open] summary{color:var(--brand-deep);}
  .faq-a{padding:0 4px 20px;font-size:14.5px;line-height:1.85;color:#4A5C74;}
  .faq-a p{margin:0;}

  /* 情境区 */
  .section{margin-top:66px;}
  .section-title{margin:0 0 10px;font-size:clamp(24px,2.4vw,30px);font-weight:700;letter-spacing:-.3px;line-height:1.35;}
  .section-sub{margin:0;max-width:740px;font-size:15px;color:var(--muted);}
  .situation{display:grid;grid-template-columns:1fr;gap:28px;margin-top:28px;}
  @media (min-width:1024px){
    .situation{grid-template-columns:minmax(0,.82fr) minmax(0,1fr);align-items:center;gap:36px;}
  }
  .figure-card{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);background:#fff;}
  .figure-card img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s ease;}
  .figure-card:hover img{transform:scale(1.03);}
  .figure-badge{
    position:absolute;left:16px;bottom:16px;background:#fff;color:var(--brand-deep);
    font-size:12.5px;font-weight:600;padding:7px 14px;border-radius:999px;
    box-shadow:0 6px 18px rgba(21,49,92,.16);
  }
  .step-item{display:flex;gap:16px;padding:20px 0;border-top:1px solid var(--line);}
  .step-item:first-child{border-top:none;padding-top:0;}
  .step-num{
    flex:0 0 42px;width:42px;height:42px;border-radius:12px;background:var(--brand-soft);
    color:var(--brand-deep);font-weight:700;display:flex;align-items:center;justify-content:center;
    font-size:15px;
  }
  .step-body h3{margin:0 0 4px;font-size:16.5px;font-weight:700;}
  .step-body p{margin:0;font-size:14.5px;line-height:1.8;color:var(--muted);}

  /* 帮助 CTA */
  .help-cta{
    margin-top:66px;display:grid;gap:24px;align-items:center;
    background:var(--brand-soft);border:1px solid #D8E5FF;border-radius:var(--r-panel);
    padding:32px;box-shadow:0 10px 30px rgba(47,107,255,.08);
  }
  @media (min-width:900px){.help-cta{grid-template-columns:minmax(0,1fr) auto;}}
  .help-cta h2{margin:0 0 8px;font-size:24px;font-weight:700;letter-spacing:-.2px;}
  .help-cta p{margin:0;font-size:15px;line-height:1.8;color:#47607F;max-width:660px;}
  .help-actions{display:flex;flex-wrap:wrap;gap:12px;}

  .quick-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
  .quick-link{
    display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:12px;
    background:#fff;border:1px solid var(--line);color:#42536B;font-size:14px;text-decoration:none;
    transition:border-color .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease;
  }
  .quick-link:hover{border-color:rgba(47,107,255,.35);color:var(--brand-deep);box-shadow:var(--shadow-card);transform:translateY(-1px);}
  .quick-link .arrow{color:var(--brand);transition:transform .18s ease;}
  .quick-link:hover .arrow{transform:translateX(3px);}

  /* 页脚 */
  .site-footer{background:#0E1E33;color:#D7E2F1;padding:56px 0 28px;margin-top:auto;}
  .site-footer .wrap{max-width:1200px;}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.25fr;gap:32px;}
  @media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px;}}
  @media (max-width:560px){.footer-grid{grid-template-columns:1fr;}}
  .site-footer .brand-name{font-size:18px;font-weight:700;color:#fff;margin-bottom:10px;}
  .footer-brand p{margin:0;max-width:330px;font-size:14px;line-height:1.85;color:#9DB2CC;}
  .footer-col h3{margin:0 0 14px;font-size:14px;font-weight:600;color:#fff;}
  .footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
  .footer-col a{color:#AFC3DC;text-decoration:none;font-size:14.5px;transition:color .18s ease;}
  .footer-col a:hover{color:#fff;}
  .footer-contact li{color:#9DB2CC;font-size:13.5px;line-height:1.75;}
  .footer-contact strong{color:#D7E2F1;font-weight:600;}
  .footer-bottom{
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
    margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
    font-size:13px;color:#8BA0BC;
  }

  /* 移动端顶栏与抽屉 */
  .mobile-bar{
    display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:60;
    align-items:center;justify-content:space-between;padding:0 20px;
    background:#fff;border-bottom:1px solid var(--line);
  }
  .mobile-brand{display:flex;align-items:center;gap:10px;text-decoration:none;}
  .mobile-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;border-radius:10px;}
  .mobile-brand .brand-mark::before{inset:9px;}
  .mobile-brand .brand-name{font-size:14.5px;}
  .mobile-brand .brand-sub{font-size:11px;}
  .menu-btn{
    display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 14px;
    border-radius:10px;border:1px solid var(--line);background:#fff;color:#31435C;font-size:14px;
    transition:background .18s ease,border-color .18s ease;
  }
  .menu-btn:hover{background:var(--brand-soft);border-color:#BED4FF;color:var(--brand-deep);}
  .menu-icon{display:inline-flex;flex-direction:column;gap:4px;}
  .menu-icon i{display:block;width:16px;height:2px;border-radius:2px;background:currentColor;}

  .drawer-mask{
    position:fixed;inset:0;background:rgba(15,30,51,.42);z-index:70;
    opacity:0;pointer-events:none;transition:opacity .28s ease;
  }
  .drawer-mask.open{opacity:1;pointer-events:auto;}
  .mobile-drawer{
    position:fixed;top:0;bottom:0;left:0;width:84%;max-width:340px;z-index:80;
    display:flex;flex-direction:column;gap:22px;padding:22px 20px 30px;
    background:#fff;overflow-y:auto;transform:translateX(-102%);
    transition:transform .28s ease;
  }
  .mobile-drawer.open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
  .drawer-close{
    display:inline-flex;align-items:center;justify-content:center;
    width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
    background:#fff;color:#31435C;font-size:16px;
  }
  .drawer-close:hover{background:var(--brand-soft);color:var(--brand-deep);}
  .mobile-drawer .nav-link{height:48px;}
  body.lock{overflow:hidden;}

  @media (max-width:1023px){
    .site-aside{display:none;}
    .mobile-bar{display:flex;}
    .content-shell{padding-top:64px;}
  }
  @media (min-width:1024px){
    .mobile-bar,.mobile-drawer,.drawer-mask{display:none;}
  }
  @media (max-width:768px){
    .wrap{padding:0 20px;}
    main{padding:18px 0 48px;}
    .card-pad{padding:20px;}
    .help-cta{padding:22px;}
    .page-lead{font-size:15.5px;}
    .faq-item summary{font-size:15.5px;}
    .site-footer{padding:44px 0 24px;}
    .site-footer .wrap{padding:0 20px;}
    .check-meter{flex-wrap:wrap;}
  }

/* roulang page: category5 */
:root{
    --primary:#2F6BFF;
    --primary-dark:#1E4FD8;
    --primary-soft:#EAF1FF;
    --ink:#13233A;
    --text:#5B6B80;
    --muted:#8695A8;
    --bg:#F6F9FD;
    --surface:#FFFFFF;
    --soft:#EEF4FC;
    --border:#DDE8F5;
    --teal:#0F8B8D;
    --coral:#FF7A59;
    --ok:#1F9D72;
    --warn:#E58A1F;
    --err:#D94C4C;
    --r-card:16px;
    --r-panel:24px;
    --r-btn:12px;
    --shadow:0 8px 28px rgba(21,49,92,.08);
    --shadow-hover:0 14px 36px rgba(21,49,92,.12);
    --sidebar-w:248px;
  }

  *{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
    background:var(--bg);
    color:var(--ink);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%;}
  a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
  a:hover{color:var(--primary-dark);}
  button{font-family:inherit;}
  :focus-visible{outline:3px solid rgba(47,107,255,.28);outline-offset:2px;border-radius:6px;}

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

  /* ============ 侧栏 ============ */
  .sidebar{
    position:fixed;top:0;left:0;width:var(--sidebar-w);height:100vh;
    background:var(--surface);border-right:1px solid var(--border);
    z-index:50;overflow-y:auto;
  }
  .sidebar-inner{display:flex;flex-direction:column;min-height:100%;padding:24px 16px 20px;}
  .brand{display:flex;align-items:center;gap:10px;padding:6px 8px 0;text-decoration:none;}
  .brand-mark{
    width:38px;height:38px;border-radius:11px;flex:0 0 38px;
    background:var(--primary);color:#fff;font-size:16px;font-weight:700;
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 6px 16px rgba(47,107,255,.28);
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.3;min-width:0;}
  .brand-name{font-size:15px;font-weight:700;color:var(--ink);letter-spacing:.2px;}
  .brand-sub{font-size:11px;color:var(--muted);margin-top:2px;}

  .nav-group{display:flex;flex-direction:column;gap:4px;margin-top:26px;}
  .nav-label{font-size:11px;letter-spacing:.18em;color:var(--muted);padding:0 10px 8px;font-weight:600;}
  .nav-link{
    position:relative;display:flex;align-items:center;gap:10px;
    height:44px;padding:0 12px;border-radius:10px;
    font-size:15px;font-weight:500;color:#3D5068;text-decoration:none;
    transition:background .18s ease,color .18s ease;
  }
  .nav-dot{width:6px;height:6px;border-radius:999px;background:#C7D4E5;flex:0 0 6px;transition:background .18s ease;}
  .nav-link:hover{background:var(--soft);color:var(--ink);}
  .nav-link:hover .nav-dot{background:#9DB6DA;}
  .nav-link.active{background:var(--primary-soft);color:var(--primary-dark);font-weight:600;}
  .nav-link.active .nav-dot{background:var(--primary);}
  .nav-link.active::before{
    content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
    width:3px;height:20px;border-radius:0 3px 3px 0;background:var(--primary);
  }
  .help-card{
    margin-top:auto;background:var(--primary-soft);border:1px solid rgba(47,107,255,.18);
    border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:8px;
  }
  .help-card h3{margin:0;font-size:14px;font-weight:700;color:var(--ink);}
  .help-card p{margin:0;font-size:12.5px;line-height:1.7;color:#50617A;}
  .sidebar-foot{margin-top:16px;padding:0 8px;font-size:11.5px;color:var(--muted);}

  /* ============ 主区域 ============ */
  .main-wrap{margin-left:var(--sidebar-w);display:flex;flex-direction:column;min-height:100vh;}
  .page-main{flex:1 1 auto;padding:26px 0 0;}

  .mobile-topbar{display:none;}
  .scrim{display:none;}

  /* ============ 面包屑 ============ */
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);flex-wrap:wrap;}
  .breadcrumb a{color:var(--text);}
  .breadcrumb a:hover{color:var(--primary);}
  .breadcrumb .sep{color:#B7C6D9;}
  .breadcrumb .current{color:var(--ink);font-weight:600;}

  /* ============ 页面头 ============ */
  .page-head{
    display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:44px;align-items:center;
    padding:34px 0 10px;
  }
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--primary-soft);color:var(--primary-dark);
    border:1px solid rgba(47,107,255,.22);border-radius:999px;
    padding:6px 14px;font-size:12.5px;font-weight:600;letter-spacing:.02em;
  }
  .eyebrow::before{content:"";width:6px;height:6px;border-radius:999px;background:var(--coral);}
  .page-title{
    margin:18px 0 14px;font-size:clamp(30px,3.4vw,42px);line-height:1.22;
    font-weight:700;color:var(--ink);letter-spacing:-.01em;
  }
  .page-title .accent{color:var(--primary);}
  .page-lead{margin:0;max-width:620px;font-size:16.5px;color:var(--text);line-height:1.85;}
  .page-meta{display:flex;flex-wrap:wrap;gap:18px;margin-top:20px;font-size:13px;color:var(--muted);}
  .page-meta span{display:inline-flex;align-items:center;gap:6px;}
  .page-meta strong{color:var(--ink);font-weight:600;}
  .page-head-media{position:relative;}
  .page-head-media img{
    width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;
    border:1px solid var(--border);box-shadow:var(--shadow);
  }
  .page-head-tag{
    position:absolute;left:16px;bottom:16px;background:var(--surface);
    border:1px solid var(--border);border-radius:999px;padding:7px 14px;
    font-size:12.5px;font-weight:600;color:var(--ink);box-shadow:var(--shadow);
  }

  /* ============ 筛选 chips ============ */
  .chips{display:flex;flex-wrap:wrap;gap:10px;margin:32px 0 20px;}
  .chip{
    border:1px solid var(--border);background:var(--surface);color:var(--text);
    padding:9px 18px;border-radius:999px;font-size:14px;font-weight:600;
    cursor:pointer;transition:all .18s ease;
  }
  .chip:hover{background:var(--soft);color:var(--ink);border-color:#CBDCEF;}
  .chip.active{background:var(--primary-soft);border-color:rgba(47,107,255,.35);color:var(--primary-dark);}
  .chip:active{transform:translateY(1px);}

  /* ============ 公告列表 ============ */
  .notice-panel{
    background:var(--surface);border:1px solid var(--border);
    border-radius:var(--r-panel);box-shadow:var(--shadow);overflow:hidden;
  }
  .notice-item{
    display:grid;grid-template-columns:88px minmax(0,1fr) 44px;gap:22px;
    align-items:flex-start;padding:24px 28px;border-bottom:1px solid var(--border);
    transition:background .2s ease;
  }
  .notice-item:last-child{border-bottom:0;}
  .notice-item:hover{background:#F8FBFF;}
  .notice-date{
    display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:2px;background:var(--soft);border:1px solid var(--border);
    border-radius:12px;padding:10px 6px;text-align:center;
  }
  .notice-day{font-size:24px;font-weight:700;line-height:1;color:var(--ink);font-variant-numeric:tabular-nums;}
  .notice-month{font-size:12px;color:var(--text);font-weight:600;}
  .notice-year{font-size:11px;color:var(--muted);}
  .notice-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:8px;}
  .badge{
    display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;
    font-size:12px;font-weight:600;line-height:1.4;
  }
  .badge-activity{background:#EAF1FF;color:#1E4FD8;}
  .badge-feature{background:#E3F4F4;color:#0F8B8D;}
  .badge-security{background:#FFEFEA;color:#D9542F;}
  .badge-help{background:#E7F6EF;color:#1F9D72;}
  .notice-time{font-size:12.5px;color:var(--muted);}
  .notice-title{margin:0 0 8px;font-size:18px;font-weight:700;color:var(--ink);line-height:1.5;}
  .notice-desc{margin:0;font-size:14.5px;line-height:1.8;color:var(--text);}
  .notice-link{
    width:40px;height:40px;border-radius:12px;border:1px solid var(--border);
    display:flex;align-items:center;justify-content:center;
    color:var(--primary);font-size:16px;background:var(--surface);
    transition:all .2s ease;align-self:center;
  }
  .notice-item:hover .notice-link{background:var(--primary);border-color:var(--primary);color:#fff;transform:translateX(2px);}

  /* ============ 发布说明 ============ */
  .info-section{margin-top:64px;}
  .info-panel{
    display:grid;grid-template-columns:minmax(0,0.85fr) minmax(0,1fr);gap:44px;
    align-items:center;background:var(--surface);border:1px solid var(--border);
    border-radius:var(--r-panel);padding:36px;box-shadow:var(--shadow);
  }
  .info-media img{
    width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);
    border:1px solid var(--border);
  }
  .info-content h2{margin:0 0 12px;font-size:clamp(24px,2.6vw,30px);font-weight:700;color:var(--ink);line-height:1.3;}
  .info-lead{margin:0 0 22px;font-size:15.5px;color:var(--text);line-height:1.85;}
  .info-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:16px;}
  .info-list li{display:flex;gap:14px;align-items:flex-start;}
  .info-num{
    flex:0 0 34px;width:34px;height:34px;border-radius:10px;background:var(--primary-soft);
    color:var(--primary-dark);font-size:13px;font-weight:700;
    display:flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums;
  }
  .info-list h3{margin:0 0 4px;font-size:15.5px;font-weight:700;color:var(--ink);}
  .info-list p{margin:0;font-size:14px;line-height:1.75;color:var(--text);}

  /* ============ FAQ ============ */
  .faq-section{margin-top:64px;}
  .section-head{max-width:720px;margin-bottom:24px;}
  .section-head h2{margin:0 0 10px;font-size:clamp(24px,2.6vw,30px);font-weight:700;color:var(--ink);line-height:1.3;}
  .section-head p{margin:0;font-size:15.5px;color:var(--text);line-height:1.85;}
  .faq-list{
    background:var(--surface);border:1px solid var(--border);border-radius:var(--r-panel);
    box-shadow:var(--shadow);overflow:hidden;
  }
  .faq-item{border-bottom:1px solid var(--border);}
  .faq-item:last-child{border-bottom:0;}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
    gap:18px;padding:20px 26px;font-size:17px;font-weight:600;color:var(--ink);
    transition:background .18s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:hover{background:#F8FBFF;}
  .faq-icon{
    flex:0 0 28px;width:28px;height:28px;border-radius:999px;background:var(--primary-soft);
    color:var(--primary-dark);position:relative;transition:background .2s ease;
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;top:50%;left:50%;background:currentColor;
    border-radius:2px;transform:translate(-50%,-50%);
  }
  .faq-icon::before{width:12px;height:2px;}
  .faq-icon::after{width:2px;height:12px;transition:opacity .2s ease,transform .2s ease;}
  .faq-item[open] .faq-icon{background:var(--primary);color:#fff;}
  .faq-item[open] .faq-icon::after{opacity:0;transform:translate(-50%,-50%) rotate(90deg);}
  .faq-answer{padding:0 26px 22px;font-size:15px;line-height:1.85;color:var(--text);}
  .faq-answer p{margin:0 0 10px;}
  .faq-answer p:last-child{margin-bottom:0;}

  /* ============ CTA ============ */
  .cta-panel{
    margin-top:64px;background:var(--primary-soft);border:1px solid rgba(47,107,255,.2);
    border-radius:var(--r-panel);padding:40px;display:grid;
    grid-template-columns:minmax(0,1fr) auto;gap:36px;align-items:center;
  }
  .cta-text h2{margin:0 0 12px;font-size:clamp(24px,2.6vw,30px);font-weight:700;color:var(--ink);line-height:1.3;}
  .cta-text p{margin:0 0 18px;font-size:15.5px;color:#41536B;line-height:1.85;max-width:600px;}
  .cta-points{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:12px 26px;}
  .cta-points li{display:flex;align-items:center;gap:8px;font-size:14px;color:#3D5068;}
  .cta-points li::before{content:"";width:6px;height:6px;border-radius:999px;background:var(--primary);flex:0 0 6px;}
  .cta-actions{display:flex;flex-direction:column;gap:12px;min-width:200px;}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;
    font-weight:600;text-decoration:none;border:1px solid transparent;cursor:pointer;
    transition:all .2s ease;white-space:nowrap;
  }
  .btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(47,107,255,.24);}
  .btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(30,79,216,.28);}
  .btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(30,79,216,.24);}
  .btn-ghost{background:var(--surface);color:var(--primary);border-color:rgba(47,107,255,.4);}
  .btn-ghost:hover{background:#fff;color:var(--primary-dark);border-color:var(--primary);}
  .btn-ghost:active{transform:translateY(1px);}
  .btn-sm{height:38px;padding:0 16px;font-size:13.5px;border-radius:10px;}

  /* ============ 页脚 ============ */
  .site-footer{background:#0E1B2C;color:#C7D4E5;margin-top:72px;}
  .site-footer .wrap{padding-top:56px;padding-bottom:26px;}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;}
  .footer-brand .brand-name{color:#fff;font-size:18px;font-weight:700;margin-bottom:12px;}
  .footer-brand p{margin:0;font-size:14px;line-height:1.8;color:#9FB2C9;max-width:320px;}
  .footer-col h3{color:#fff;font-size:14px;font-weight:600;margin:0 0 14px;}
  .footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
  .footer-col a{color:#C7D4E5;font-size:15px;}
  .footer-col a:hover{color:#fff;}
  .footer-contact li{font-size:14px;line-height:1.75;color:#9FB2C9;}
  .footer-contact strong{color:#DCE7F5;font-weight:600;}
  .footer-bottom{
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
    font-size:13px;color:#8FA3BC;
  }

  /* ============ 响应式 ============ */
  @media (max-width:1279px){
    .page-head{grid-template-columns:minmax(0,1fr) 280px;gap:32px;}
    .info-panel{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;padding:30px;}
  }

  @media (max-width:1023px){
    .sidebar{
      width:288px;transform:translateX(-100%);
      transition:transform .28s ease;box-shadow:0 0 40px rgba(14,27,44,.18);
      z-index:80;
    }
    .sidebar.open{transform:translateX(0);}
    .main-wrap{margin-left:0;padding-top:64px;}
    .mobile-topbar{
      display:flex;align-items:center;justify-content:space-between;gap:12px;
      position:fixed;top:0;left:0;right:0;height:64px;padding:0 20px;
      background:var(--surface);border-bottom:1px solid var(--border);z-index:70;
    }
    .brand-mobile{padding:0;gap:8px;}
    .brand-mobile .brand-mark{width:32px;height:32px;flex:0 0 32px;border-radius:9px;font-size:14px;}
    .brand-mobile .brand-name{font-size:14.5px;}
    .brand-mobile .brand-sub{font-size:10px;}
    .menu-btn{
      display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 14px;
      border:1px solid var(--border);border-radius:10px;background:var(--surface);
      color:var(--ink);font-size:14px;font-weight:600;cursor:pointer;
    }
    .menu-btn:hover{background:var(--soft);}
    .scrim{
      display:none;position:fixed;inset:0;background:rgba(14,27,44,.42);z-index:75;
    }
    .scrim.open{display:block;}
    .page-main{padding-top:20px;}
    .page-head{grid-template-columns:1fr;padding-top:24px;}
    .page-head-media{order:2;}
    .page-head-media img{aspect-ratio:16/10;max-height:280px;}
    .info-panel{grid-template-columns:1fr;}
    .cta-panel{grid-template-columns:1fr;padding:32px;}
    .cta-actions{flex-direction:row;flex-wrap:wrap;}
    .cta-actions .btn{flex:1 1 180px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  }

  @media (max-width:767px){
    .wrap{padding:0 20px;}
    .page-title{font-size:30px;}
    .page-lead{font-size:15.5px;}
    .chips{margin:24px 0 16px;gap:8px;}
    .chip{padding:8px 14px;font-size:13px;}
    .notice-item{
      grid-template-columns:minmax(0,1fr) 36px;gap:14px;padding:20px;
    }
    .notice-date{
      grid-column:1 / -1;flex-direction:row;align-items:baseline;justify-content:flex-start;
      gap:8px;background:transparent;border:0;padding:0;
    }
    .notice-day{font-size:18px;}
    .notice-month{font-size:12.5px;}
    .notice-year{font-size:11.5px;}
    .notice-title{font-size:16.5px;}
    .notice-desc{font-size:14px;}
    .notice-link{width:36px;height:36px;align-self:flex-start;}
    .info-section,.faq-section,.cta-panel{margin-top:44px;}
    .info-panel{padding:24px;}
    .faq-item summary{padding:18px 20px;font-size:16px;}
    .faq-answer{padding:0 20px 20px;font-size:14.5px;}
    .cta-panel{padding:26px;}
    .site-footer{margin-top:48px;}
    .site-footer .wrap{padding-top:40px;}
    .footer-bottom{flex-direction:column;gap:8px;}
  }

  @media (max-width:520px){
    .footer-grid{grid-template-columns:1fr;gap:26px;}
    .cta-actions{flex-direction:column;}
    .cta-actions .btn{width:100%;}
    .page-meta{gap:12px;font-size:12.5px;}
  }