/* roulang page: index */
:root{
  --brand:#0F5C8C;
  --brand-dark:#0B4A72;
  --brand-soft:#E8F2F8;
  --deep:#0B1B2B;
  --deep-2:#102A40;
  --neon:#22D3EE;
  --warm:#F5A524;
  --bg:#F4F7FA;
  --card:#FFFFFF;
  --text:#0E1A24;
  --muted:#56687A;
  --line:#E3EAF1;
  --radius-card:16px;
  --radius-img:12px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-card:0 1px 2px rgba(15,35,55,.04), 0 8px 24px rgba(15,35,55,.06);
  --shadow-hover:0 16px 40px rgba(15,35,55,.10);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;padding:0;font-family:var(--font-sans);font-size:16px;line-height:1.8;
  color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;color:var(--text);}
p{margin:0;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
input,textarea{font-family:inherit;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
@media (max-width:640px){.wrap{padding:0 20px;}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,27,43,.94);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(34,211,238,.18);
}
.nav-inner{
  max-width:1200px;margin:0 auto;padding:0 32px;height:74px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.logo{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.logo-mark{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:#0F5C8C;border:1px solid rgba(34,211,238,.55);
  color:#EAF6FF;font-size:14px;font-weight:700;letter-spacing:.5px;font-family:system-ui,sans-serif;
  box-shadow:0 0 18px rgba(34,211,238,.22);
}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-main{color:#EAF6FF;font-size:17px;font-weight:700;letter-spacing:.2px;}
.logo-sub{color:#8FA9C0;font-size:11px;letter-spacing:1.6px;}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;padding:10px 14px;font-size:15px;color:#C7D6E4;border-radius:8px;
  transition:color .2s ease,background .2s ease;white-space:nowrap;
}
.nav-link:hover{color:#EAF6FF;background:rgba(255,255,255,.05);}
.nav-link.active{color:var(--neon);}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--neon);box-shadow:0 0 12px rgba(34,211,238,.85);
}
.nav-cta{
  padding:9px 20px;border-radius:var(--radius-pill);border:1px solid rgba(34,211,238,.7);
  color:var(--neon);font-size:14px;font-weight:600;white-space:nowrap;
  transition:all .2s ease;
}
.nav-cta:hover{background:var(--neon);color:#04121E;box-shadow:0 0 20px rgba(34,211,238,.45);}
.burger{
  display:none;width:42px;height:42px;border-radius:var(--radius-btn);
  border:1px solid rgba(34,211,238,.35);flex-direction:column;
  align-items:center;justify-content:center;gap:5px;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:#C7D6E4;transition:all .2s ease;}
.burger:hover span{background:var(--neon);}
.drawer{
  position:fixed;inset:0;z-index:90;background:rgba(8,21,33,.99);
  padding:22px 20px;display:none;flex-direction:column;
}
.drawer.open{display:flex;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-close{
  width:42px;height:42px;border-radius:var(--radius-btn);border:1px solid rgba(34,211,238,.35);
  display:grid;place-items:center;color:#C7D6E4;font-size:20px;
}
.drawer-link{
  padding:14px 16px;border-radius:var(--radius-btn);color:#C7D6E4;font-size:17px;
  border-left:3px solid transparent;transition:all .2s ease;
}
.drawer-link:hover{background:rgba(255,255,255,.05);color:#EAF6FF;}
.drawer-link.active{color:var(--neon);border-left-color:var(--neon);background:rgba(34,211,238,.08);}
.drawer-cta{
  margin-top:20px;text-align:center;padding:13px 20px;border-radius:var(--radius-pill);
  border:1px solid rgba(34,211,238,.7);color:var(--neon);font-weight:600;
}
@media (max-width:1024px){
  .nav-links,.nav-cta{display:none;}
  .burger{display:flex;}
  .nav-inner{height:66px;padding:0 20px;}
  .wrap{padding:0 20px;}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;transition:all .2s ease;white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 24px rgba(15,92,140,.28);}
.btn-ghost{color:#fff;border-color:rgba(255,255,255,.42);}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;}
.btn-outline{background:#fff;color:var(--brand);border-color:#D6E2EC;}
.btn-outline:hover{border-color:var(--brand);color:var(--brand-dark);box-shadow:0 8px 20px rgba(15,92,140,.12);}
.btn:focus-visible,a:focus-visible,button:focus-visible{
  outline:2px solid var(--neon);outline-offset:3px;
}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--deep);color:#fff;padding:88px 0 92px;}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:22px 22px;
}
.hero::after{
  content:"";position:absolute;right:-140px;top:-120px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(34,211,238,.16),transparent 68%);pointer-events:none;
}
.hero-grid{
  position:relative;z-index:1;display:grid;grid-template-columns:58% 42%;
  gap:48px;align-items:center;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--radius-pill);
  background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.4);
  color:#9BE9F7;font-size:13px;margin-bottom:22px;
}
.hero-eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--neon);box-shadow:0 0 10px rgba(34,211,238,.9);}
.hero-title{
  font-size:48px;line-height:1.25;letter-spacing:-.5px;color:#fff;font-weight:700;
}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.85;color:#B9CBDC;max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:12px 40px;margin-top:40px;padding-top:24px;
  border-top:1px solid rgba(255,255,255,.12);
}
.hero-facts li{font-size:14px;color:#9DB0C2;}
.hero-facts strong{color:#EAF6FF;font-size:16px;font-weight:700;margin-right:6px;font-family:system-ui,sans-serif;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;height:380px;object-fit:cover;border-radius:20px;
  border:1px solid rgba(34,211,238,.3);
  box-shadow:0 24px 60px rgba(0,0,0,.42);
  background:#E8EEF4;
}
.float-card{
  position:absolute;left:-22px;bottom:26px;display:flex;align-items:center;gap:12px;
  padding:14px 18px;border-radius:var(--radius-img);
  background:rgba(255,255,255,.94);border:1px solid rgba(34,211,238,.6);
  box-shadow:0 16px 32px rgba(0,0,0,.24);
}
.float-dot{width:9px;height:9px;border-radius:50%;background:#18B26B;box-shadow:0 0 10px rgba(24,178,107,.8);flex:0 0 auto;}
.float-card strong{display:block;font-size:14px;color:var(--text);line-height:1.4;}
.float-card span{display:block;font-size:12px;color:var(--muted);line-height:1.4;}
@media (max-width:960px){
  .hero{padding:60px 0 66px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-title{font-size:32px;letter-spacing:-.3px;}
  .hero-sub{font-size:16px;}
  .hero-visual img{height:260px;}
  .float-card{left:12px;bottom:14px;padding:12px 14px;}
}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0;}
.section-alt{background:#fff;}
.section-head{margin-bottom:44px;max-width:760px;}
.section-head .eyebrow{
  display:inline-block;font-size:13px;font-weight:600;color:var(--brand);
  letter-spacing:1.5px;margin-bottom:12px;text-transform:uppercase;font-family:system-ui,sans-serif;
}
.section-head h2{font-size:30px;line-height:1.35;}
.section-lead{margin-top:14px;font-size:16px;color:var(--muted);line-height:1.85;}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);transition:all .2s ease;}
.text-link .arw{transition:transform .2s ease;}
.text-link:hover{color:var(--brand-dark);}
.text-link:hover .arw{transform:translateX(4px);}
@media (max-width:640px){
  .section{padding:60px 0;}
  .section-head h2{font-size:24px;}
  .section-head-row{margin-bottom:30px;}
}

/* ---------- 服务卡 ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px;}
.svc-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 28px;box-shadow:var(--shadow-card);transition:all .2s ease;
  display:flex;flex-direction:column;gap:10px;
}
.svc-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.svc-main{grid-column:span 6;grid-row:span 3;background:var(--brand);border-color:transparent;color:#EAF6FF;justify-content:flex-start;}
.svc-small{grid-column:span 6;}
.svc-icon{
  width:44px;height:44px;border-radius:var(--radius-img);display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);font-size:18px;font-weight:700;
  font-family:system-ui,sans-serif;margin-bottom:6px;
}
.svc-main .svc-icon{background:rgba(255,255,255,.14);color:#EAF6FF;}
.svc-card h3{font-size:19px;}
.svc-main h3{color:#fff;font-size:22px;margin-top:8px;}
.svc-card p{font-size:15px;color:var(--muted);line-height:1.8;}
.svc-main p{color:#C6DCEB;font-size:15px;max-width:460px;}
.svc-main .svc-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:22px;}
.svc-tags span{
  font-size:13px;padding:4px 12px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.12);color:#EAF6FF;
}
.svc-arrow{margin-top:auto;padding-top:14px;font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;gap:6px;align-items:center;}
.svc-main .svc-arrow{color:#9BE9F7;}
.svc-card:hover .svc-arrow .arw{transform:translateX(4px);}
.svc-arrow .arw{transition:transform .2s ease;}
@media (max-width:1024px){
  .svc-main{grid-column:span 12;grid-row:auto;}
  .svc-small{grid-column:span 6;}
}
@media (max-width:640px){
  .svc-small{grid-column:span 12;}
  .svc-card{padding:22px;}
}

/* ---------- 数据带 ---------- */
.stat-band{background:var(--deep);padding:72px 0;position:relative;overflow:hidden;}
.stat-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:20px 20px;
}
.stat-grid{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:32px;}
.stat-num{
  font-size:38px;font-weight:700;color:var(--neon);line-height:1.2;
  text-shadow:0 0 24px rgba(34,211,238,.45);font-family:system-ui,sans-serif;
}
.stat-label{margin-top:8px;font-size:14px;color:#9DB0C2;line-height:1.7;}
@media (max-width:768px){
  .stat-band{padding:52px 0;}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:26px;}
  .stat-num{font-size:30px;}
}

/* ---------- 案例 ---------- */
.case-grid{display:grid;grid-template-columns:7fr 5fr;gap:20px;}
.case-stack{display:grid;gap:20px;grid-template-rows:1fr 1fr;}
.case-card{
  position:relative;display:block;overflow:hidden;border-radius:var(--radius-card);
  background:#E8EEF4;min-height:220px;
}
.case-card img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.case-card:hover img{transform:scale(1.04);}
.case-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,27,43,.06),rgba(11,27,43,.88));}
.case-body{position:absolute;left:26px;right:26px;bottom:22px;color:#fff;}
.case-body h3{color:#fff;font-size:19px;line-height:1.45;}
.case-tag{
  display:inline-block;margin-bottom:10px;padding:3px 12px;border-radius:var(--radius-pill);
  background:rgba(34,211,238,.16);border:1px solid rgba(34,211,238,.45);
  color:#9BE9F7;font-size:12px;font-weight:600;
}
.case-card-lg{min-height:470px;}
.case-card-lg .case-body h3{font-size:23px;}
@media (max-width:960px){
  .case-grid{grid-template-columns:1fr;}
  .case-card-lg{min-height:320px;}
  .case-stack{grid-template-rows:auto auto;}
}
@media (max-width:640px){
  .case-body{left:20px;right:20px;bottom:18px;}
  .case-card-lg .case-body h3{font-size:19px;}
}

/* ---------- 方案列表 ---------- */
.plan-list{border-top:1px solid var(--line);}
.plan-item{
  display:grid;grid-template-columns:76px 1fr auto;gap:24px;align-items:center;
  padding:26px 0;border-bottom:1px solid var(--line);transition:all .2s ease;
}
.plan-item:hover{background:#fff;padding-left:16px;padding-right:16px;}
.plan-num{font-size:26px;font-weight:700;color:#C3D5E3;font-family:system-ui,sans-serif;line-height:1;}
.plan-item h3{font-size:18px;}
.plan-item p{margin-top:6px;font-size:15px;color:var(--muted);}
.plan-link{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.plan-item:hover .plan-link .arw{transform:translateX(4px);}
.plan-link .arw{transition:transform .2s ease;}
@media (max-width:768px){
  .plan-item{grid-template-columns:48px 1fr;gap:16px;}
  .plan-link{grid-column:2;justify-self:start;}
  .plan-num{font-size:20px;}
}

/* ---------- 资讯列表 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);
  transition:all .2s ease;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.post-thumb{aspect-ratio:16/10;overflow:hidden;background:#E8EEF4;}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.post-card:hover .post-thumb img{transform:scale(1.04);}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.badge{
  display:inline-flex;align-items:center;width:fit-content;
  padding:3px 12px;border-radius:var(--radius-pill);
  background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;
}
.post-title{
  font-size:17px;line-height:1.55;font-weight:600;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .2s ease;
}
.post-card:hover .post-title{color:var(--brand);}
.post-excerpt{
  font-size:14px;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:auto;padding-top:8px;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:#8496A8;font-family:system-ui,sans-serif;
}
.post-meta .arw{color:var(--brand);transition:transform .2s ease;}
.post-card:hover .post-meta .arw{transform:translateX(4px);}
.post-empty{
  grid-column:1/-1;border:1px dashed #C9D8E4;border-radius:var(--radius-card);
  background:#fff;padding:56px 24px;text-align:center;
}
.post-empty p{color:var(--muted);font-size:15px;margin-bottom:18px;}
@media (max-width:1024px){.post-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:640px){.post-grid{grid-template-columns:1fr;}}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);max-width:900px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;padding:18px 0;
  min-height:60px;text-align:left;cursor:pointer;
}
.faq-idx{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:700;
  display:grid;place-items:center;font-family:system-ui,sans-serif;
}
.faq-qtext{flex:1;font-size:16px;font-weight:600;color:var(--text);transition:color .2s ease;}
.faq-icon{font-size:20px;line-height:1;color:var(--muted);transition:transform .2s ease,color .2s ease;}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--brand);}
.faq-item.open .faq-qtext{color:var(--brand);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-item.open .faq-a{max-height:420px;}
.faq-a-inner{
  border-left:3px solid var(--brand);padding:2px 0 22px 16px;
  font-size:15px;color:var(--muted);line-height:1.85;
}

/* ---------- 联系 ---------- */
.contact-panel{
  position:relative;overflow:hidden;
  background:var(--deep);border-radius:var(--radius-card);padding:52px;
  display:grid;grid-template-columns:1fr 1fr;gap:48px;color:#fff;
}
.contact-panel::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:20px 20px;
}
.contact-left,.contact-right{position:relative;z-index:1;}
.contact-left h2{font-size:30px;color:#fff;line-height:1.35;}
.contact-left p{margin-top:16px;font-size:15px;color:#B9CBDC;line-height:1.85;max-width:420px;}
.contact-info{margin-top:30px;display:grid;gap:14px;}
.contact-info li{
  display:flex;gap:12px;align-items:flex-start;font-size:14px;color:#C6DCEB;
  padding:14px 16px;border-radius:var(--radius-img);
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);
}
.contact-info strong{display:block;color:#EAF6FF;font-size:14px;margin-bottom:2px;}
.contact-info .dot{width:8px;height:8px;border-radius:50%;background:var(--neon);margin-top:8px;flex:0 0 auto;box-shadow:0 0 10px rgba(34,211,238,.8);}
.field{margin-bottom:16px;}
.field label{display:block;font-size:14px;color:#9DB0C2;margin-bottom:8px;}
.field input,.field textarea{
  width:100%;background:#fff;border:1px solid #D6E2EC;border-radius:var(--radius-btn);
  padding:0 14px;height:46px;font-size:15px;color:var(--text);transition:all .2s ease;
}
.field textarea{height:auto;min-height:104px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(15,92,140,.18);
}
.form-tip{margin-top:12px;font-size:13px;color:#9BE9F7;min-height:20px;line-height:1.6;}
@media (max-width:960px){
  .contact-panel{grid-template-columns:1fr;padding:34px 24px;gap:32px;}
  .contact-left h2{font-size:24px;}
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--deep);color:#9DB0C2;padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:36px;}
.footer-brand .logo-main{font-size:16px;}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:#8FA9C0;max-width:280px;}
.footer-title{color:#fff;font-size:14px;font-weight:700;margin-bottom:16px;}
.footer-link{display:block;font-size:14px;color:#9DB0C2;padding:5px 0;transition:color .2s ease;}
.footer-link:hover{color:var(--neon);}
.footer-text{font-size:14px;color:#8FA9C0;line-height:1.85;margin-bottom:8px;}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:12px;color:#7E93A6;font-family:system-ui,sans-serif;
}
@media (max-width:960px){
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;}
}
@media (max-width:640px){
  .site-footer{padding:52px 0 0;}
  .footer-grid{grid-template-columns:1fr;}
}

/* roulang page: article */
:root{
  --brand:#0F5C8C;
  --brand-dark:#0B4A72;
  --dark:#0B1B2B;
  --neon:#22D3EE;
  --warm:#F5A524;
  --bg:#F4F7FA;
  --card:#FFFFFF;
  --text:#0E1A24;
  --muted:#56687A;
  --line:#E3EAF1;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(15,35,55,.04),0 8px 24px rgba(15,35,55,.06);
  --sh-hover:0 16px 40px rgba(15,35,55,.10);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease;}
img{display:block;max-width:100%;}
button{font-family:inherit;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0;}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;}

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

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,27,43,.94);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(34,211,238,.18);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;height:76px;}
.logo{display:flex;flex-direction:column;justify-content:center;line-height:1.15;}
.logo-main{font-size:19px;font-weight:700;color:#EAF6FF;letter-spacing:.6px;}
.logo-sub{font-size:12px;font-weight:500;color:var(--neon);letter-spacing:2.6px;margin-top:2px;}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-link{position:relative;padding:10px 14px;font-size:15px;color:#C7D6E4;border-radius:var(--r-btn);transition:color .2s ease,background .2s ease;}
.nav-link:hover{color:#EAF6FF;background:rgba(255,255,255,.06);}
.nav-link.active{color:var(--neon);}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--neon);box-shadow:0 0 12px rgba(34,211,238,.85);
}
.header-actions{display:flex;align-items:center;gap:14px;}
.nav-cta{
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 20px;border-radius:var(--r-pill);
  border:1px solid rgba(34,211,238,.6);
  color:var(--neon);font-size:14px;font-weight:500;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.nav-cta:hover{background:var(--neon);color:#06202C;box-shadow:0 0 20px rgba(34,211,238,.45);transform:translateY(-1px);}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;border-radius:var(--r-btn);
  background:transparent;border:1px solid rgba(34,211,238,.35);
}
.nav-toggle span{display:block;height:2px;width:20px;margin:0 auto;background:#C7D6E4;border-radius:2px;transition:.2s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);background:var(--neon);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);background:var(--neon);}

/* ---------- Page shell ---------- */
.page-main{padding:40px 0 88px;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--muted);margin-bottom:26px;
  max-width:1120px;margin-left:auto;margin-right:auto;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#A9B9C8;}
.breadcrumb .current{color:#8B9AAB;max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px;max-width:1120px;margin:0 auto;}
.article-main{min-width:0;max-width:780px;width:100%;margin:0 auto;}

/* ---------- Article head ---------- */
.article-head{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);padding:32px 34px;margin-bottom:32px;
}
.badge-cat{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:var(--r-pill);
  background:#FEF5E7;color:#A96900;font-size:12px;font-weight:600;letter-spacing:.4px;
}
.article-head h1{
  font-size:32px;line-height:1.32;letter-spacing:-.4px;color:var(--text);
  margin-top:16px;font-weight:700;
}
.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:50%;background:#C3D1DD;}
.article-lead{
  margin-top:18px;padding-top:18px;border-top:1px dashed var(--line);
  font-size:15px;line-height:1.85;color:var(--muted);
}

/* ---------- Article body ---------- */
.article-body{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);padding:38px 40px 42px;
  font-size:16px;line-height:1.9;color:#22303C;
}
.article-body > *:first-child{margin-top:0;}
.article-body > * + *{margin-top:22px;}
.article-body h2{
  font-size:26px;line-height:1.35;font-weight:700;color:var(--text);
  margin-top:40px;padding-left:14px;border-left:4px solid var(--neon);border-radius:2px;
}
.article-body h3{font-size:19px;font-weight:600;color:var(--text);margin-top:32px;}
.article-body h4{font-size:17px;font-weight:600;color:var(--text);margin-top:26px;}
.article-body ul{list-style:none;padding-left:0;}
.article-body ol{list-style:decimal;padding-left:22px;}
.article-body ul li{position:relative;padding-left:20px;margin:9px 0;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:13px;width:6px;height:6px;border-radius:2px;
  background:var(--brand);opacity:.75;
}
.article-body ol li{margin:9px 0;padding-left:4px;}
.article-body ol li::marker{color:var(--brand);font-weight:600;}
.article-body p{margin:0;}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(15,92,140,.3);}
.article-body a:hover{color:var(--brand-dark);border-bottom-color:var(--brand-dark);}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;background:#F0F6FB;
  border-left:4px solid var(--brand);border-radius:0 var(--r-img) var(--r-img) 0;
  color:#33505F;font-size:15.5px;
}
.article-body img{border-radius:var(--r-img);margin:26px auto;max-width:100%;height:auto;}
.article-body figure{margin:26px 0;}
.article-body figcaption{text-align:center;font-size:14px;color:var(--muted);margin-top:10px;}
.article-body table{
  width:100%;border-collapse:collapse;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;
}
.article-body thead th{background:#EFF5FA;text-align:left;font-weight:600;color:var(--text);}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);}
.article-body tbody tr:nth-child(even){background:#FAFCFE;}
.article-body tbody tr:last-child td{border-bottom:none;}
.article-body .note,.article-body .tip,.article-body .ok,.article-body .warn,.article-body .danger{
  padding:16px 20px;border-radius:0 var(--r-img) var(--r-img) 0;font-size:15px;
}
.article-body .note,.article-body .tip{background:#E8F4FB;border-left:4px solid var(--brand);}
.article-body .ok{background:#EAF7EF;border-left:4px solid #1E9E63;}
.article-body .warn{background:#FEF5E7;border-left:4px solid var(--warm);}
.article-body .danger{background:#FDEDED;border-left:4px solid #D9534F;}
.article-body hr{border:none;border-top:1px solid var(--line);margin:34px 0;}

/* ---------- TOC ---------- */
.toc{display:none;}
.toc-title{font-size:14px;font-weight:700;color:var(--text);letter-spacing:1px;margin-bottom:14px;}
.toc-list{display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--line);}
.toc-list a{
  display:block;padding:7px 0 7px 14px;margin-left:-1px;
  font-size:14px;line-height:1.6;color:var(--muted);border-left:2px solid transparent;
}
.toc-list a:hover{color:var(--brand);border-left-color:rgba(15,92,140,.4);}
.toc-list a.is-active{color:var(--brand);border-left-color:var(--neon);font-weight:600;background:linear-gradient(90deg,rgba(34,211,238,.08),transparent);}
.toc-mobile{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:16px 20px;margin-bottom:24px;box-shadow:var(--sh-card);
}
.toc-mobile summary{
  cursor:pointer;font-size:15px;font-weight:600;color:var(--text);
  list-style:none;display:flex;align-items:center;justify-content:space-between;
}
.toc-mobile summary::-webkit-details-marker{display:none;}
.toc-mobile summary::after{content:"+";color:var(--brand);font-size:18px;font-weight:700;transition:transform .2s ease;}
.toc-mobile[open] summary::after{transform:rotate(45deg);}
.toc-mobile .toc-list{margin-top:14px;}

/* ---------- Footer of article ---------- */
.article-tail{
  margin-top:28px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);padding:26px 30px;display:flex;flex-wrap:wrap;gap:18px;
  align-items:center;justify-content:space-between;
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;align-items:center;padding:5px 13px;border-radius:var(--r-pill);
  background:#EFF5FA;color:var(--brand);font-size:12.5px;font-weight:500;
}
.tag:hover{background:var(--brand);color:#fff;}
.tail-actions{display:flex;flex-wrap:wrap;gap:12px;}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);
  padding:8px 14px;border-radius:var(--r-btn);
}
.btn-text:hover{background:#EFF5FA;color:var(--brand-dark);}
.btn-text .arw{transition:transform .2s ease;}
.btn-text:hover .arw{transform:translateX(4px);}

/* ---------- Related ---------- */
.related{margin-top:56px;}
.related-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px;}
.related-head h2{font-size:22px;letter-spacing:-.3px;color:var(--text);}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.rel-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#CFE0EC;}
.rel-thumb{aspect-ratio:4/3;background:#E8EEF4;overflow:hidden;}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .2s ease;}
.rel-card:hover .rel-thumb img{transform:scale(1.04);}
.rel-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;}
.rel-body h3{font-size:15.5px;line-height:1.55;font-weight:600;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-card:hover .rel-body h3{color:var(--brand);}
.rel-date{font-size:12.5px;color:var(--muted);}

/* ---------- CTA panel ---------- */
.cta-panel{
  margin-top:56px;border-radius:var(--r-card);padding:44px 46px;
  background:linear-gradient(135deg,#0B1B2B 0%,#0E2E45 60%,#0B4A72 100%);
  position:relative;overflow:hidden;
}
.cta-panel::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(34,211,238,.35) 1px,transparent 1px);
  background-size:22px 22px;opacity:.06;pointer-events:none;
}
.cta-inner{position:relative;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;}
.cta-inner h2{font-size:26px;color:#EAF6FF;letter-spacing:-.3px;}
.cta-inner p{margin-top:10px;font-size:15px;color:#9DB0C2;max-width:520px;}
.btn-primary{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 26px;border-radius:var(--r-btn);background:var(--brand);color:#fff;
  font-size:15px;font-weight:600;border:none;
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--sh-hover);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 26px;border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.45);color:#EAF6FF;font-size:15px;font-weight:600;background:transparent;
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.btn-ghost:hover{border-color:var(--neon);background:rgba(34,211,238,.12);transform:translateY(-1px);}

/* ---------- Empty state ---------- */
.empty-state{
  background:var(--card);border:1px dashed #C7D8E5;border-radius:var(--r-card);
  padding:64px 30px;text-align:center;box-shadow:var(--sh-card);
}
.empty-state p{font-size:16px;color:var(--muted);margin-bottom:18px;}

/* ---------- Back to top ---------- */
.to-top{
  position:fixed;right:26px;bottom:26px;z-index:40;
  width:46px;height:46px;border-radius:var(--r-pill);
  display:flex;align-items:center;justify-content:center;
  background:var(--dark);color:var(--neon);border:1px solid rgba(34,211,238,.35);
  box-shadow:0 10px 26px rgba(11,27,43,.28);
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
}
.to-top:hover{transform:translateY(-3px);background:#0E2E45;box-shadow:0 14px 32px rgba(11,27,43,.36);}

/* ---------- Footer ---------- */
.site-footer{background:var(--dark);color:#9DB0C2;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:36px;padding-bottom:44px;}
.footer-brand .logo-text{display:flex;flex-direction:column;line-height:1.15;margin-bottom:16px;}
.footer-brand .logo-main{font-size:18px;font-weight:700;color:#EAF6FF;letter-spacing:.6px;}
.footer-brand .logo-sub{font-size:12px;color:var(--neon);letter-spacing:2.6px;margin-top:2px;}
.footer-brand p{font-size:14px;line-height:1.85;color:#8FA3B6;max-width:300px;}
.footer-title{font-size:14px;font-weight:700;color:#FFFFFF;margin-bottom:16px;letter-spacing:.5px;}
.footer-link{display:block;font-size:14px;color:#9DB0C2;padding:5px 0;transition:color .2s ease,transform .2s ease;}
.footer-link:hover{color:var(--neon);transform:translateX(3px);}
.footer-text{font-size:14px;color:#8FA3B6;line-height:1.9;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px solid rgba(255,255,255,.08);padding:20px 0 26px;
  font-size:12px;color:#7A8FA3;
}

/* ---------- Responsive ---------- */
@media (min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,780px) 260px;gap:56px;justify-content:center;}
  .article-main{max-width:none;margin:0;}
  .toc{display:block;position:sticky;top:104px;align-self:start;}
  .toc-mobile{display:none;}
}
@media (max-width:1023px){
  .nav-links{
    position:fixed;left:0;right:0;top:76px;bottom:0;
    flex-direction:column;align-items:stretch;gap:2px;
    padding:22px 20px 40px;overflow-y:auto;
    background:rgba(11,27,43,.985);
    -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
    opacity:0;transform:translateY(-10px);pointer-events:none;
    transition:opacity .2s ease,transform .2s ease;
  }
  .nav-links.open{opacity:1;transform:none;pointer-events:auto;}
  .nav-link{padding:15px 16px;font-size:16px;border-left:3px solid transparent;border-radius:0;}
  .nav-link:hover{background:rgba(255,255,255,.05);}
  .nav-link.active{border-left-color:var(--neon);background:rgba(34,211,238,.07);box-shadow:inset 0 0 18px rgba(34,211,238,.06);}
  .nav-link.active::after{display:none;}
  .nav-toggle{display:flex;}
  .header-actions .nav-cta{display:none;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
}
@media (max-width:900px){
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:767px){
  .wrap{padding:0 20px;}
  .page-main{padding:26px 0 60px;}
  .article-head{padding:24px 22px;}
  .article-head h1{font-size:26px;}
  .article-body{padding:26px 22px 30px;font-size:16px;line-height:1.9;}
  .article-body h2{font-size:22px;margin-top:32px;}
  .article-body h3{font-size:17px;}
  .article-tail{padding:20px 22px;flex-direction:column;align-items:flex-start;}
  .related{margin-top:42px;}
  .related-grid{grid-template-columns:minmax(0,1fr);}
  .cta-panel{padding:30px 24px;margin-top:42px;}
  .cta-inner h2{font-size:22px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;padding-bottom:34px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .to-top{right:16px;bottom:16px;width:42px;height:42px;}
  .breadcrumb .current{max-width:180px;}
}
@media (max-width:520px){
  .logo-main{font-size:17px;}
  .logo-sub{font-size:11px;letter-spacing:2px;}
  .article-head h1{font-size:23px;}
  .article-body table{font-size:14px;}
  .article-body th,.article-body td{padding:9px 10px;}
}

/* roulang page: category1 */
:root{
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --brand:#0F5C8C;
  --brand-dark:#0B4A72;
  --brand-soft:#E8F1F8;
  --cyan:#22D3EE;
  --cyan-dim:rgba(34,211,238,.18);
  --amber:#F5A524;
  --ink:#0E1A24;
  --ink-2:#56687A;
  --ink-3:#8A9AAB;
  --bg:#F4F7FA;
  --card:#FFFFFF;
  --line:#E3EAF1;
  --deep:#0B1B2B;
  --deep-2:#0F2438;
  --nav-bg:rgba(11,27,43,.94);
  --nav-text:#C7D6E4;
  --nav-text-hover:#EAF6FF;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;
  --shadow-card:0 1px 2px rgba(15,35,55,.04),0 8px 24px rgba(15,35,55,.06);
  --shadow-hover:0 16px 40px rgba(15,35,55,.10);
  --glow:0 0 12px rgba(34,211,238,.85);
  --ease:200ms ease;
  --sec-y:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
.site-body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}
h1,h2,h3,p,ul,ol{margin:0;padding:0}
ul,ol{list-style:none}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--nav-bg);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--cyan-dim);
}
.nav-inner{display:flex;align-items:center;gap:28px;height:74px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:6px;height:34px;border-radius:3px;background:var(--cyan);
  box-shadow:var(--glow);
}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-main{font-size:17px;font-weight:700;letter-spacing:.6px;color:#FFFFFF}
.logo-sub{font-size:11px;letter-spacing:1.6px;color:#9DB0C2}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;display:inline-block;padding:9px 14px;border-radius:8px;
  font-size:15px;color:var(--nav-text);transition:color var(--ease),background var(--ease);
}
.nav-link:hover{color:var(--nav-text-hover);background:rgba(255,255,255,.04)}
.nav-link.active{color:var(--cyan)}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;background:var(--cyan);box-shadow:var(--glow);
}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 20px;border-radius:var(--r-pill);
  border:1px solid var(--cyan);color:var(--cyan);
  font-size:14px;letter-spacing:.5px;
  transition:background var(--ease),color var(--ease),box-shadow var(--ease);
}
.nav-cta:hover{background:var(--cyan);color:#08202E;box-shadow:0 0 20px rgba(34,211,238,.45)}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;margin-left:auto;border-radius:8px;
  border:1px solid rgba(255,255,255,.14);
}
.nav-toggle span{display:block;width:18px;height:2px;margin:0 auto;background:#EAF6FF;transition:transform var(--ease),opacity var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;letter-spacing:.4px;
  transition:transform var(--ease),background var(--ease),color var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-card)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--shadow-hover)}
.btn-ghost{border:1px solid rgba(255,255,255,.45);color:#FFFFFF}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:0 0 20px rgba(34,211,238,.30)}
.btn-cyan{background:var(--cyan);color:#08202E}
.btn-cyan:hover{background:#5BE2F5;transform:translateY(-1px);box-shadow:0 0 24px rgba(34,211,238,.45)}
.btn-outline{border:1px solid #D6E2EC;background:#fff;color:var(--brand)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand-dark);transform:translateY(-1px)}
.btn:focus-visible,.nav-link:focus-visible,.nav-cta:focus-visible,.side-link:focus-visible,.faq-btn:focus-visible{
  outline:2px solid var(--cyan);outline-offset:3px;
}

/* ===== 面包屑 ===== */
.crumb-bar{padding:22px 0 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3)}
.crumb a{color:var(--ink-2);transition:color var(--ease)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#C3D0DC}
.crumb em{font-style:normal;color:var(--ink-2)}

/* ===== 分类首屏 ===== */
.cat-hero{padding:28px 0 0}
.cat-hero-grid{display:grid;grid-template-columns:1.45fr 1fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);
  font-size:12px;letter-spacing:1px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--amber)}
.cat-title{
  margin-top:18px;font-size:46px;line-height:1.25;font-weight:700;letter-spacing:-.5px;color:var(--ink);
}
.cat-title span{color:var(--brand)}
.cat-lead{margin-top:20px;font-size:16px;color:var(--ink-2);line-height:1.9;max-width:620px}
.cat-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.cat-meta{display:flex;flex-wrap:wrap;gap:26px;margin-top:34px;padding-top:22px;border-top:1px solid var(--line)}
.cat-meta li{font-size:13px;color:var(--ink-2)}
.cat-meta li strong{display:block;font-size:15px;color:var(--ink);font-weight:700;letter-spacing:.2px}
.hero-visual{position:relative}
.hero-img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);
  box-shadow:var(--shadow-card);background:#E8EEF4;
}
.hero-float{
  position:absolute;left:-18px;bottom:22px;
  padding:14px 18px;border-radius:var(--r-card);
  background:rgba(255,255,255,.94);border:1px solid rgba(34,211,238,.55);
  box-shadow:var(--shadow-card);max-width:240px;
}
.float-label{display:block;font-size:11px;letter-spacing:1.4px;color:var(--brand)}
.float-value{display:block;margin-top:4px;font-size:15px;font-weight:700;color:var(--ink)}

/* ===== 横幅图位 ===== */
.banner-strip{position:relative;margin-top:64px;height:280px;overflow:hidden}
.banner-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.banner-veil{position:absolute;inset:0;background:linear-gradient(90deg,rgba(244,247,250,.96) 0%,rgba(244,247,250,.78) 48%,rgba(244,247,250,.35) 100%)}
.banner-inner{position:relative;height:100%;display:flex;flex-direction:column;justify-content:center;gap:10px}
.banner-tag{
  align-self:flex-start;padding:4px 12px;border-radius:var(--r-pill);
  background:rgba(15,92,140,.10);color:var(--brand);font-size:12px;letter-spacing:1px;
}
.banner-title{font-size:26px;line-height:1.35;font-weight:700;color:var(--ink);max-width:720px}
.banner-text{font-size:14px;color:var(--ink-2);max-width:640px}

/* ===== 主内容：锚点 + 条目 ===== */
.guide-section{padding:var(--sec-y) 0 0}
.guide-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:56px;align-items:start}
.guide-side{position:sticky;top:104px}
.side-label{font-size:12px;letter-spacing:2px;color:var(--ink-3);margin-bottom:14px}
.side-list{border-left:1px solid var(--line)}
.side-list li a{
  position:relative;display:block;padding:10px 0 10px 18px;
  font-size:14px;color:var(--ink-2);transition:color var(--ease),background var(--ease);
}
.side-list li a::before{
  content:"";position:absolute;left:-1px;top:8px;bottom:8px;width:2px;border-radius:2px;
  background:transparent;transition:background var(--ease),box-shadow var(--ease);
}
.side-list li a:hover{color:var(--brand)}
.side-list li a.is-active{color:var(--brand);font-weight:600}
.side-list li a.is-active::before{background:var(--brand);box-shadow:0 0 10px rgba(15,92,140,.35)}
.side-card{
  margin-top:28px;padding:22px;border-radius:var(--r-card);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.side-card-title{font-size:15px;font-weight:700;color:var(--ink)}
.side-card-text{margin:8px 0 16px;font-size:13px;line-height:1.75;color:var(--ink-2)}

.guide-head{margin-bottom:26px}
.section-kicker{font-size:12px;letter-spacing:2px;color:var(--brand)}
.section-title{margin-top:10px;font-size:30px;line-height:1.3;font-weight:700;color:var(--ink);letter-spacing:-.3px}
.section-sub{margin-top:12px;font-size:15px;color:var(--ink-2);max-width:680px}

.entry-list{border-top:1px solid var(--line)}
.entry{
  display:grid;grid-template-columns:56px minmax(0,1fr) 44px;gap:22px;align-items:start;
  padding:30px 0;border-bottom:1px solid var(--line);
  transition:background var(--ease);
}
.entry:hover{background:rgba(255,255,255,.72)}
.entry-no{
  width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid #D6E2EC;background:#fff;
  font-size:14px;font-weight:700;color:var(--brand);letter-spacing:.5px;
}
.entry-title{font-size:19px;line-height:1.45;font-weight:600;color:var(--ink)}
.entry-text{margin-top:8px;font-size:15px;line-height:1.85;color:var(--ink-2)}
.entry-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag{
  display:inline-flex;align-items:center;padding:3px 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);font-size:12px;letter-spacing:.4px;
}
.tag-amber{background:rgba(245,165,36,.14);color:#9A6408}
.entry-arrow{
  display:grid;place-items:center;width:40px;height:40px;border-radius:50%;
  color:var(--ink-3);border:1px solid transparent;
  transition:transform var(--ease),color var(--ease),border-color var(--ease),background var(--ease);
}
.entry:hover .entry-arrow{color:var(--brand);border-color:#D6E2EC;background:#fff;transform:translateX(4px)}

/* ===== 深色数据带 ===== */
.stats-band{margin-top:var(--sec-y);background:var(--deep);color:#fff;padding:76px 0}
.stats-head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:24px;justify-content:space-between}
.stats-title{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.3px}
.stats-sub{font-size:14px;color:#9DB0C2;max-width:520px;line-height:1.8}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:46px}
.stat{padding-top:20px;border-top:1px solid rgba(255,255,255,.10)}
.stat-num{
  font-size:38px;font-weight:700;letter-spacing:-.5px;color:var(--cyan);
  text-shadow:0 0 18px rgba(34,211,238,.45);line-height:1.1;
}
.stat-unit{margin-left:6px;font-size:14px;color:#9DB0C2}
.stat-text{margin-top:10px;font-size:13px;line-height:1.7;color:#9DB0C2}

/* ===== FAQ ===== */
.faq-section{padding:var(--sec-y) 0 0}
.faq-list{margin-top:34px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{font-size:16px;font-weight:400}
.faq-btn{
  display:flex;align-items:center;gap:16px;width:100%;
  min-height:64px;padding:14px 4px;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);
  transition:color var(--ease);
}
.faq-btn:hover{color:var(--brand)}
.faq-mark{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:700;
}
.faq-text{flex:1 1 auto}
.faq-icon{
  flex:0 0 auto;font-size:20px;line-height:1;color:var(--brand);
  transition:transform var(--ease),color var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-item.open .faq-btn{color:var(--brand)}
.faq-a{display:none;padding:0 4px 24px 46px}
.faq-item.open .faq-a{display:block}
.faq-a p{
  border-left:3px solid var(--brand);padding-left:16px;
  font-size:15px;line-height:1.9;color:var(--ink-2);
}

/* ===== CTA 面板 ===== */
.cta-wrap{padding:var(--sec-y) 0}
.cta-panel{
  position:relative;overflow:hidden;
  display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;
  padding:52px 48px;border-radius:var(--r-card);
  background:linear-gradient(135deg,#0B1B2B 0%,#0F2438 100%);
  color:#fff;
}
.cta-panel::after{
  content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;
  border-radius:50%;border:1px solid rgba(34,211,238,.18);opacity:.9;
}
.cta-title{font-size:28px;line-height:1.35;font-weight:700;letter-spacing:-.3px}
.cta-text{margin-top:14px;font-size:15px;line-height:1.9;color:#9DB0C2;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}

/* ===== 页脚 ===== */
.site-footer{background:var(--deep);color:#9DB0C2;padding:72px 0 0;border-top:1px solid rgba(34,211,238,.14)}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:36px}
.footer-brand .logo-text{margin-bottom:14px}
.footer-brand p{font-size:13px;line-height:1.85;color:#9DB0C2;max-width:300px}
.footer-title{font-size:14px;font-weight:700;color:#FFFFFF;margin-bottom:16px}
.footer-link{display:block;font-size:14px;color:#9DB0C2;padding:6px 0;transition:color var(--ease),transform var(--ease)}
.footer-link:hover{color:var(--cyan);transform:translateX(3px)}
.footer-text{font-size:13px;line-height:1.9;color:#9DB0C2;margin-bottom:6px}
.footer-bottom{
  margin-top:52px;padding:22px 0 26px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:12px;color:#7F93A8;
}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .cat-hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{order:2}
  .hero-float{left:14px;bottom:14px}
  .guide-layout{grid-template-columns:1fr;gap:32px}
  .guide-side{position:static}
  .side-card{display:none}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:26px}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .cta-panel{grid-template-columns:1fr;padding:42px 32px}
  .cta-actions{justify-content:flex-start}
  .nav-links{
    position:fixed;left:0;right:0;top:74px;bottom:0;
    flex-direction:column;align-items:stretch;gap:2px;
    margin-left:0;padding:20px 24px 40px;
    background:rgba(11,27,43,.985);
    -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
    opacity:0;transform:translateY(-10px);pointer-events:none;
    transition:opacity var(--ease),transform var(--ease);
    overflow-y:auto;
  }
  .nav-links.open{opacity:1;transform:none;pointer-events:auto}
  .nav-link{padding:16px 10px;font-size:17px;border-bottom:1px solid rgba(255,255,255,.06)}
  .nav-link.active::after{display:none}
  .nav-link.active::before{
    content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:3px;
    background:var(--cyan);box-shadow:var(--glow);
  }
  .nav-cta{display:none}
  .nav-toggle{display:flex}
}
@media (max-width:768px){
  .wrap{padding:0 20px}
  :root{--sec-y:60px}
  .cat-title{font-size:32px}
  .cat-lead{font-size:15px}
  .banner-strip{height:230px}
  .banner-title{font-size:20px}
  .section-title{font-size:24px}
  .stats-title,.cta-title{font-size:22px}
  .stats-band{padding:56px 0}
  .entry{grid-template-columns:44px minmax(0,1fr);gap:16px}
  .entry-arrow{display:none}
  .entry-no{width:38px;height:38px;font-size:13px}
  .entry-title{font-size:17px}
  .faq-a{padding-left:0}
  .faq-btn{font-size:15px}
  .cta-panel{padding:34px 22px}
  .btn{height:46px;padding:0 20px;font-size:14px}
}
@media (max-width:520px){
  .cat-meta{gap:16px}
  .cat-meta li{font-size:12px}
  .stats-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .hero-float{left:10px;bottom:10px;padding:12px 14px;max-width:200px}
  .float-value{font-size:13px}
  .cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column;gap:6px}
}

/* roulang page: category2 */
:root{
  --brand:#0F5C8C;
  --brand-dark:#0B4A72;
  --ink-dark:#0B1B2B;
  --neon:#22D3EE;
  --warm:#F5A524;
  --bg:#F4F7FA;
  --card:#FFFFFF;
  --text:#0E1A24;
  --muted:#56687A;
  --line:#E3EAF1;
  --radius-card:16px;
  --radius-img:12px;
  --radius-btn:10px;
  --radius-pill:999px;
  --radius-input:10px;
  --shadow-card:0 1px 2px rgba(15,35,55,.04),0 8px 24px rgba(15,35,55,.06);
  --shadow-hover:0 16px 40px rgba(15,35,55,.10);
  --space-section:96px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding-left:1.2em}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}
.wrap{max-width:1200px;margin:0 auto;padding:0 32px}
@media (max-width:767px){.wrap{padding:0 20px}}

/* ============ HEADER / NAV ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,27,43,.94);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(34,211,238,.18);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  height:72px;
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-text{display:flex;flex-direction:column;line-height:1.12}
.logo-main{font-size:20px;font-weight:700;letter-spacing:.6px;color:#EAF6FF}
.logo-sub{font-size:11px;letter-spacing:2.4px;color:var(--neon)}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-size:15px;
  color:#C7D6E4;
  transition:color .2s ease;
}
.nav-link:hover{color:#EAF6FF}
.nav-link.active{color:var(--neon)}
.nav-link.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;border-radius:2px;
  background:var(--neon);
  box-shadow:0 0 12px rgba(34,211,238,.85);
}
.header-actions{display:flex;align-items:center;gap:14px}
.btn-nav{
  display:inline-flex;align-items:center;justify-content:center;
  padding:9px 20px;border-radius:var(--radius-pill);
  font-size:14px;font-weight:600;color:var(--neon);
  border:1px solid rgba(34,211,238,.55);
  background:transparent;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn-nav:hover{background:var(--neon);color:#0B1B2B;box-shadow:0 0 20px rgba(34,211,238,.45)}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 10px;
  background:transparent;border:1px solid rgba(34,211,238,.35);border-radius:10px;cursor:pointer;
}
.nav-toggle span{display:block;height:2px;width:100%;background:#C7D6E4;border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-drawer{
  display:none;
  position:fixed;inset:72px 0 0 0;z-index:59;
  background:rgba(9,22,35,.985);
  padding:28px 24px 40px;
  overflow-y:auto;
}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{
  display:block;padding:16px 14px;font-size:17px;color:#C7D6E4;
  border-bottom:1px solid rgba(255,255,255,.07);
}
.mobile-drawer a.active{color:var(--neon);border-left:3px solid var(--neon);box-shadow:inset 12px 0 20px -18px rgba(34,211,238,.9)}
.mobile-drawer .drawer-cta{margin-top:26px;text-align:center;border:1px solid rgba(34,211,238,.55);border-radius:var(--radius-pill);color:var(--neon)}
@media (max-width:1023px){
  .nav-links{display:none}
  .btn-nav{display:none}
  .nav-toggle{display:flex}
}

/* ============ BREADCRUMB ============ */
.crumb{padding:22px 0 0}
.crumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);list-style:none;padding:0;margin:0}
.crumb-list li{display:flex;align-items:center;gap:8px}
.crumb-list li::after{content:"›";color:#B7C5D3}
.crumb-list li:last-child::after{content:""}
.crumb-list a{color:var(--muted);transition:color .2s ease}
.crumb-list a:hover{color:var(--brand)}
.crumb-list .current{color:#8A9AAA}

/* ============ HERO ============ */
.page-hero{
  position:relative;
  padding:40px 0 48px;
  background:linear-gradient(180deg,#F4F7FA 0%,#FFFFFF 100%);
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(15,92,140,.16) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.5;pointer-events:none;
}
.page-hero .wrap{position:relative}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--radius-pill);
  background:#E7F2F9;color:var(--brand);
  font-size:12px;font-weight:600;letter-spacing:.4px;
  margin-bottom:20px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--warm)}
.page-title{
  font-size:48px;line-height:1.24;font-weight:700;letter-spacing:-.5px;
  color:var(--text);max-width:880px;
  margin-bottom:22px;
}
.page-lead{
  max-width:760px;font-size:16px;line-height:1.85;color:var(--muted);
  margin-bottom:32px;
}
.filter-row{
  display:flex;gap:10px;flex-wrap:nowrap;overflow-x:auto;
  padding-bottom:6px;scrollbar-width:thin;
}
.filter-row::-webkit-scrollbar{height:4px}
.filter-row::-webkit-scrollbar-thumb{background:#CFDCE8;border-radius:4px}
.chip{
  flex:0 0 auto;
  padding:9px 20px;border-radius:var(--radius-pill);
  font-size:14px;font-weight:500;cursor:pointer;
  color:var(--brand);background:#FFFFFF;border:1px solid #D6E2EC;
  transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.chip:hover{border-color:var(--brand);color:var(--brand-dark)}
.chip.is-active{
  background:var(--brand);color:#FFFFFF;border-color:var(--brand);
  box-shadow:0 8px 18px rgba(15,92,140,.22);
}
@media (max-width:900px){
  .page-title{font-size:32px;letter-spacing:0}
  .page-hero{padding:28px 0 36px}
}

/* ============ SECTIONS ============ */
.section{padding:var(--space-section) 0}
.section.alt{background:#FFFFFF}
.section-head{margin-bottom:40px}
.section-kicker{
  display:block;font-size:13px;font-weight:600;letter-spacing:2px;
  color:var(--brand);margin-bottom:12px;
}
.section-title{
  font-size:30px;line-height:1.32;font-weight:700;color:var(--text);
  margin-bottom:14px;
}
.section-desc{max-width:720px;font-size:16px;color:var(--muted);line-height:1.85}
@media (max-width:767px){
  :root{--space-section:60px}
  .section-title{font-size:24px}
}

/* ============ BANNER ============ */
.banner{
  position:relative;height:280px;border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-card);
}
.banner img{width:100%;height:100%;object-fit:cover;background:#E8EEF4}
.banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(11,27,43,.62) 0%,rgba(11,27,43,.28) 55%,rgba(11,27,43,.10) 100%);
}
.banner-inner{
  position:absolute;inset:0;z-index:2;
  display:flex;flex-direction:column;justify-content:center;
  padding:0 56px;
}
.banner-inner h2{font-size:26px;line-height:1.35;font-weight:700;color:#FFFFFF;margin-bottom:12px;max-width:520px}
.banner-inner p{font-size:15px;color:rgba(234,246,255,.86);max-width:520px;line-height:1.8}
@media (max-width:767px){
  .banner{height:auto;min-height:240px}
  .banner-inner{padding:28px 22px;position:relative;background:linear-gradient(180deg,rgba(11,27,43,.72),rgba(11,27,43,.86))}
  .banner::after{display:none}
  .banner img{position:absolute;inset:0}
  .banner-inner h2{font-size:20px}
  .banner-inner p{font-size:14px}
}

/* ============ CASE GRID ============ */
.case-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:28px;
}
.case-card{
  position:relative;display:block;
  border-radius:var(--radius-card);overflow:hidden;
  aspect-ratio:16/10;background:#E8EEF4;
  box-shadow:var(--shadow-card);
  transition:box-shadow .25s ease,transform .25s ease;
}
.case-card img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .5s ease,opacity .35s ease;
  opacity:.9;
}
.case-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,27,43,.06) 0%,rgba(11,27,43,.42) 52%,rgba(11,27,43,.86) 100%);
  transition:background .3s ease;
}
.case-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.case-card:hover img{transform:scale(1.04);opacity:1}
.case-card:hover::after{background:linear-gradient(180deg,rgba(11,27,43,.18) 0%,rgba(11,27,43,.56) 48%,rgba(11,27,43,.92) 100%)}
.case-badge{
  position:absolute;top:18px;left:18px;z-index:3;
  padding:5px 13px;border-radius:var(--radius-pill);
  background:rgba(34,211,238,.16);border:1px solid rgba(34,211,238,.5);
  color:#B8F4FF;font-size:12px;font-weight:600;letter-spacing:.5px;
  -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
}
.case-body{
  position:absolute;left:0;right:0;bottom:0;z-index:3;
  padding:24px 24px 22px;
}
.case-body h3{
  font-size:19px;line-height:1.35;font-weight:600;color:#FFFFFF;
  margin-bottom:8px;
}
.case-body p{
  font-size:14px;line-height:1.7;color:rgba(219,233,244,.86);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.case-card:focus-visible{outline:2px solid var(--neon);outline-offset:3px}
@media (max-width:767px){
  .case-grid{grid-template-columns:1fr;gap:20px}
  .case-body{padding:18px 18px 16px}
  .case-body h3{font-size:17px}
}
.case-empty{
  margin-top:28px;padding:44px 20px;text-align:center;
  border:1px dashed #C9D8E5;border-radius:var(--radius-card);
  color:var(--muted);font-size:14px;display:none;
}
.case-empty.show{display:block}

/* ============ STEPS / LIST ============ */
.rule-list{border-top:1px solid var(--line)}
.rule-item{
  display:grid;grid-template-columns:64px 1fr 160px;gap:24px;align-items:start;
  padding:28px 0;border-bottom:1px solid var(--line);
}
.rule-num{
  font-size:15px;font-weight:700;color:var(--brand);
  letter-spacing:1px;padding-top:3px;
}
.rule-item h3{font-size:19px;line-height:1.4;font-weight:600;margin-bottom:8px;color:var(--text)}
.rule-item p{font-size:15px;line-height:1.8;color:var(--muted)}
.rule-tag{
  justify-self:end;align-self:center;
  padding:6px 14px;border-radius:var(--radius-pill);
  background:#E7F2F9;color:var(--brand);font-size:12px;font-weight:600;white-space:nowrap;
}
@media (max-width:900px){
  .rule-item{grid-template-columns:44px 1fr;gap:16px;padding:22px 0}
  .rule-tag{display:none}
}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;
  min-height:62px;padding:14px 0;
  background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--text);
  transition:color .2s ease;
}
.faq-q .mark{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:#E7F2F9;color:var(--brand);font-size:13px;font-weight:700;
}
.faq-q .plus{
  margin-left:auto;flex:0 0 auto;width:18px;height:18px;position:relative;
  transition:transform .2s ease;
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  transition:background .2s ease;
}
.faq-q .plus::before{left:0;top:8px;width:18px;height:2px}
.faq-q .plus::after{left:8px;top:0;width:2px;height:18px}
.faq-q:hover{color:var(--brand)}
.faq-item.open .faq-q{color:var(--brand)}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-item.open .faq-q .plus::before,.faq-item.open .faq-q .plus::after{background:var(--neon)}
.faq-a{
  display:none;
  padding:0 0 22px 40px;
  border-left:3px solid var(--brand);
  margin-left:12px;
  font-size:15px;line-height:1.85;color:var(--muted);
}
.faq-item.open .faq-a{display:block}

/* ============ CTA ============ */
.cta-panel{
  position:relative;overflow:hidden;
  background:var(--ink-dark);
  border-radius:var(--radius-card);
  padding:56px;
  display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center;
  box-shadow:0 20px 50px rgba(11,27,43,.22);
}
.cta-panel::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(34,211,238,.28) 1px,transparent 1px);
  background-size:24px 24px;opacity:.16;pointer-events:none;
}
.cta-panel > *{position:relative}
.cta-panel h2{font-size:28px;line-height:1.35;font-weight:700;color:#FFFFFF;margin-bottom:14px}
.cta-panel p{font-size:16px;line-height:1.8;color:#A9BDCE;max-width:620px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--brand);color:#FFFFFF;box-shadow:0 8px 20px rgba(15,92,140,.25)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 26px rgba(11,74,114,.32)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:#FFFFFF;border-color:rgba(255,255,255,.45)}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#FFFFFF}
.btn-line{background:#FFFFFF;color:var(--brand);border-color:#D6E2EC}
.btn-line:hover{border-color:var(--brand);color:var(--brand-dark);box-shadow:0 8px 20px rgba(15,35,55,.08)}
@media (max-width:900px){
  .cta-panel{grid-template-columns:1fr;padding:36px 24px;gap:26px}
  .cta-panel h2{font-size:22px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 160px}
}

/* ============ FOOTER ============ */
.site-footer{
  background:var(--ink-dark);
  color:#9DB0C2;
  padding:72px 0 0;
  margin-top:var(--space-section);
  border-top:1px solid rgba(34,211,238,.14);
}
.footer-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:40px;
  padding-bottom:52px;
}
.footer-brand .logo-text{margin-bottom:18px}
.footer-brand .logo-main{color:#FFFFFF}
.footer-brand p{font-size:14px;line-height:1.85;color:#8FA3B6;max-width:280px}
.footer-title{font-size:14px;font-weight:700;color:#FFFFFF;margin-bottom:16px;letter-spacing:.4px}
.footer-link{
  display:block;font-size:14px;color:#9DB0C2;padding:5px 0;
  transition:color .2s ease;
}
.footer-link:hover{color:var(--neon)}
.footer-text{font-size:14px;color:#8FA3B6;line-height:1.85;margin-bottom:6px}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  padding:22px 0 30px;
  border-top:1px solid rgba(255,255,255,.08);
  font-size:12px;color:#7D90A3;
}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
}
@media (max-width:640px){
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding-top:52px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: category3 */
:root{
    --ink:#0E1A24;
    --ink-soft:#22323F;
    --muted:#56687A;
    --primary:#0F5C8C;
    --primary-deep:#0B4A72;
    --accent:#22D3EE;
    --warm:#F5A524;
    --bg:#F4F7FA;
    --card:#FFFFFF;
    --line:#E3EAF1;
    --dark:#0B1B2B;
    --radius-card:16px;
    --radius-img:12px;
    --radius-btn:10px;
    --shadow-card:0 1px 2px rgba(15,35,55,.04),0 8px 24px rgba(15,35,55,.06);
    --shadow-hover:0 16px 40px rgba(15,35,55,.10);
    --font-sans:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
    --space-section:96px;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth;scroll-padding-top:96px}
  body{
    margin:0;
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.8;
    color:var(--ink);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit}
  h1,h2,h3,h4,p,ul,ol{margin:0}
  ul,ol{padding:0;list-style:none}
  .wrap{max-width:1200px;margin:0 auto;padding:0 32px}

  /* ============ Header ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(11,27,43,.94);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    border-bottom:1px solid rgba(34,211,238,.18);
  }
  .header-inner{display:flex;align-items:center;gap:24px;height:76px}
  .brand{display:flex;align-items:center;flex:0 0 auto}
  .logo-text{display:flex;flex-direction:column;line-height:1.15}
  .logo-main{font-size:20px;font-weight:700;color:#FFFFFF;letter-spacing:.4px}
  .logo-sub{font-size:11px;font-weight:600;color:var(--accent);letter-spacing:1.6px;margin-top:2px}
  .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
  .nav-link{
    position:relative;display:block;padding:10px 14px;font-size:15px;
    color:#C7D6E4;border-radius:8px;transition:color .2s ease,background-color .2s ease;
  }
  .nav-link:hover{color:#EAF6FF;background:rgba(255,255,255,.05)}
  .nav-link.active{color:var(--accent)}
  .nav-link.active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
    background:var(--accent);border-radius:2px;box-shadow:0 0 12px rgba(34,211,238,.85);
  }
  .header-cta{
    flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
    height:40px;padding:0 20px;font-size:14px;font-weight:600;color:var(--accent);
    border:1px solid rgba(34,211,238,.65);border-radius:999px;
    transition:all .2s ease;white-space:nowrap;
  }
  .header-cta:hover{background:var(--accent);color:#08202F;box-shadow:0 0 20px rgba(34,211,238,.45)}
  .nav-toggle{
    display:none;margin-left:auto;width:44px;height:44px;border:1px solid rgba(34,211,238,.35);
    background:transparent;border-radius:10px;cursor:pointer;padding:0;
    align-items:center;justify-content:center;flex-direction:column;gap:5px;
  }
  .nav-toggle span{display:block;width:20px;height:2px;background:#C7D6E4;border-radius:2px;transition:all .2s ease}
  .mobile-drawer{
    display:none;position:fixed;inset:76px 0 0 0;background:rgba(9,22,35,.985);
    z-index:55;padding:24px 20px 40px;overflow-y:auto;
  }
  .mobile-drawer.open{display:block}
  .drawer-link{
    display:block;position:relative;padding:16px 4px 16px 18px;font-size:17px;color:#C7D6E4;
    border-bottom:1px solid rgba(255,255,255,.07);
  }
  .drawer-link.active{color:var(--accent);font-weight:600}
  .drawer-link.active::before{
    content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;
    background:var(--accent);border-radius:2px;box-shadow:0 0 10px rgba(34,211,238,.9);
  }
  .drawer-cta{
    display:flex;align-items:center;justify-content:center;margin-top:28px;height:46px;
    border-radius:999px;background:var(--accent);color:#08202F;font-weight:700;font-size:15px;
  }

  /* ============ Buttons ============ */
  .btn-primary{
    display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;
    padding:13px 26px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
    border:1px solid transparent;cursor:pointer;transition:all .2s ease;
  }
  .btn-primary:hover{background:var(--primary-deep);transform:translateY(-1px);box-shadow:0 10px 24px rgba(15,92,140,.28)}
  .btn-primary:focus-visible{outline:3px solid rgba(34,211,238,.55);outline-offset:2px}
  .btn-outline{
    display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--primary);
    padding:13px 26px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
    border:1px solid #D6E2EC;cursor:pointer;transition:all .2s ease;
  }
  .btn-outline:hover{border-color:var(--primary);color:var(--primary-deep);transform:translateY(-1px);box-shadow:var(--shadow-card)}
  .btn-ghost{
    display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.06);color:#FFFFFF;
    padding:13px 26px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
    border:1px solid rgba(255,255,255,.32);cursor:pointer;transition:all .2s ease;
  }
  .btn-ghost:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.6)}
  .btn-block{width:100%;justify-content:center}

  /* ============ Hero ============ */
  .page-hero{padding:44px 0 0}
  .crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--muted)}
  .crumb a{color:var(--muted);transition:color .2s ease}
  .crumb a:hover{color:var(--primary)}
  .crumb .sep{color:#B9C7D4}
  .crumb .current{color:#8496A6;max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .page-title{
    font-size:48px;line-height:1.24;font-weight:700;letter-spacing:-.5px;
    margin:20px 0 18px;max-width:900px;
  }
  .page-title .hl{color:var(--primary)}
  .lead{font-size:17px;line-height:1.85;color:var(--muted);max-width:860px}
  .hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
  .pill{
    display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;
    background:#E7F1F7;color:var(--primary);font-size:13px;font-weight:600;
  }
  .pill.warm{background:#FEF3DF;color:#9A6410}

  /* ============ Banner ============ */
  .banner{
    position:relative;margin-top:40px;height:280px;border-radius:var(--radius-card);
    overflow:hidden;background:#E8EEF4;box-shadow:var(--shadow-card);
  }
  .banner img{width:100%;height:100%;object-fit:cover}
  .banner::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(90deg,rgba(244,247,250,.96) 0%,rgba(244,247,250,.86) 42%,rgba(244,247,250,.22) 100%);
  }
  .banner-copy{position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;justify-content:center;padding:0 52px;max-width:660px}
  .banner-copy h2{font-size:28px;line-height:1.35;font-weight:700;color:var(--ink)}
  .banner-copy p{margin-top:10px;font-size:15px;color:var(--muted)}

  /* ============ Layout ============ */
  .section{padding:var(--space-section) 0 0}
  .sec-head{max-width:820px;margin-bottom:36px}
  .sec-head h2{font-size:30px;line-height:1.32;font-weight:700;letter-spacing:-.3px}
  .sec-head p{margin-top:12px;color:var(--muted);font-size:16px}

  .qa-grid{display:grid;grid-template-columns:minmax(0,1fr) 344px;gap:52px;align-items:start}
  .body-col{min-width:0}
  .body-block + .body-block{margin-top:44px}
  .body-block h2{
    position:relative;padding-left:18px;font-size:26px;line-height:1.4;font-weight:700;
    letter-spacing:-.2px;margin-bottom:14px;
  }
  .body-block h2::before{
    content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:2px;background:var(--primary);
  }
  .body-block p{color:var(--ink-soft);margin-top:12px}
  .body-block p.muted{color:var(--muted);font-size:15px}

  .steps{margin-top:18px;counter-reset:step}
  .steps li{
    position:relative;padding-left:42px;margin:14px 0;color:var(--ink-soft);
  }
  .steps li::before{
    counter-increment:step;content:counter(step);
    position:absolute;left:0;top:2px;width:26px;height:26px;border-radius:50%;
    background:rgba(15,92,140,.10);color:var(--primary);
    font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;
    font-family:system-ui,sans-serif;
  }
  .dot-list{margin-top:16px}
  .dot-list li{position:relative;padding-left:20px;margin:10px 0;color:var(--ink-soft)}
  .dot-list li::before{
    content:"";position:absolute;left:2px;top:12px;width:6px;height:6px;border-radius:50%;background:var(--primary);
  }

  .note-box{
    margin-top:20px;background:#E7F1F7;border-left:4px solid var(--primary);
    border-radius:0 var(--radius-img) var(--radius-img) 0;padding:16px 20px;
    font-size:15px;color:var(--ink-soft);
  }
  .note-box.warm{background:#FEF6E7;border-left-color:var(--warm)}

  /* ============ Side column ============ */
  .side-col{position:sticky;top:104px;display:flex;flex-direction:column;gap:20px}
  .side-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
    padding:26px;box-shadow:var(--shadow-card);
  }
  .side-card h3{font-size:17px;font-weight:700;line-height:1.4;margin-bottom:6px}
  .side-card .side-sub{font-size:13px;color:var(--muted);margin-bottom:16px}
  .key-list li{
    position:relative;padding:12px 0 12px 30px;font-size:14.5px;color:var(--ink-soft);
    border-bottom:1px dashed var(--line);
  }
  .key-list li:last-child{border-bottom:0;padding-bottom:0}
  .key-list li::before{
    content:"";position:absolute;left:0;top:19px;width:16px;height:16px;border-radius:5px;
    background:rgba(34,211,238,.16);border:1px solid rgba(15,92,140,.28);
  }
  .key-list li::after{
    content:"";position:absolute;left:5px;top:24px;width:6px;height:3px;
    border-left:2px solid var(--primary);border-bottom:2px solid var(--primary);
    transform:rotate(-45deg);
  }
  .info-row{display:flex;justify-content:space-between;gap:12px;font-size:14px;padding:9px 0;border-bottom:1px solid var(--line)}
  .info-row:last-of-type{border-bottom:0}
  .info-row span:first-child{color:var(--muted)}
  .info-row span:last-child{color:var(--ink);font-weight:600}

  /* ============ FAQ ============ */
  .faq-list{border-top:1px solid var(--line);margin-top:8px}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-q{
    display:flex;align-items:center;gap:14px;width:100%;background:none;border:0;
    padding:16px 2px;text-align:left;font-size:16px;font-weight:600;color:var(--ink);
    cursor:pointer;transition:color .2s ease;
  }
  .faq-q:hover{color:var(--primary)}
  .faq-q .qmark{
    flex:0 0 auto;width:26px;height:26px;border-radius:50%;
    background:rgba(15,92,140,.10);color:var(--primary);
    font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;
    font-family:system-ui,sans-serif;
  }
  .faq-q .plus{
    margin-left:auto;flex:0 0 auto;color:var(--primary);font-size:20px;line-height:1;
    font-weight:400;transition:transform .2s ease;font-family:system-ui,sans-serif;
  }
  .faq-item.open .faq-q{color:var(--primary)}
  .faq-item.open .plus{transform:rotate(45deg)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
  .faq-a-inner{position:relative;padding:0 2px 20px 40px;color:var(--muted);font-size:15px}
  .faq-a-inner::before{
    content:"";position:absolute;left:0;top:4px;bottom:22px;width:3px;border-radius:2px;background:var(--accent);
  }

  /* ============ CTA ============ */
  .cta-panel{
    position:relative;overflow:hidden;border-radius:var(--radius-card);
    background:var(--dark);padding:56px;margin-top:var(--space-section);
  }
  .cta-panel::before{
    content:"";position:absolute;inset:0;opacity:.06;
    background-image:radial-gradient(#22D3EE 1px,transparent 1px);
    background-size:22px 22px;
  }
  .cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:56px;align-items:start}
  .cta-panel h2{color:#FFFFFF;font-size:30px;line-height:1.34;font-weight:700;letter-spacing:-.3px}
  .cta-panel .cta-desc{color:#9DB0C2;margin-top:14px;font-size:15.5px;max-width:460px}
  .cta-points{margin-top:26px;display:grid;gap:10px}
  .cta-points li{display:flex;align-items:center;gap:10px;color:#C7D6E4;font-size:14.5px}
  .cta-points li::before{
    content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);
    box-shadow:0 0 10px rgba(34,211,238,.9);flex:0 0 auto;
  }
  .form-grid{display:grid;gap:16px}
  .field label{display:block;font-size:14px;color:#9DB0C2;margin-bottom:6px}
  .form-input{
    width:100%;height:46px;background:#FFFFFF;border:1px solid #D6E2EC;
    border-radius:var(--radius-btn);padding:0 14px;font-size:15px;color:var(--ink);
    transition:all .2s ease;font-family:inherit;
  }
  textarea.form-input{height:auto;min-height:96px;padding:12px 14px;line-height:1.7;resize:vertical}
  .form-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(34,211,238,.30)}
  .form-hint{font-size:12.5px;color:#7C90A4;margin-top:2px}
  .form-msg{font-size:13px;color:var(--accent);min-height:18px}

  /* ============ Footer ============ */
  .site-footer{background:var(--dark);margin-top:var(--space-section);color:#9DB0C2}
  .footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:40px;padding:64px 0 44px}
  .footer-brand .logo-text{margin-bottom:16px}
  .footer-brand p{font-size:14px;line-height:1.8;color:#9DB0C2;max-width:300px}
  .footer-title{font-size:14px;font-weight:700;color:#FFFFFF;margin-bottom:14px;letter-spacing:.3px}
  .footer-link{display:block;font-size:14px;color:#9DB0C2;padding:5px 0;transition:color .2s ease}
  .footer-link:hover{color:var(--accent)}
  .footer-text{font-size:14px;color:#9DB0C2;padding:4px 0;line-height:1.75}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.08);padding:20px 0 28px;
    display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
    font-size:12px;color:#7C90A4;
  }

  /* ============ Responsive ============ */
  @media (max-width:1100px){
    .nav-links,.header-cta{display:none}
    .nav-toggle{display:flex}
    .qa-grid{grid-template-columns:minmax(0,1fr);gap:36px}
    .side-col{position:static}
    .cta-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  }
  @media (max-width:1024px){
    :root{--space-section:72px}
    .page-title{font-size:38px}
    .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;padding:52px 0 36px}
    .banner-copy{padding:0 32px}
  }
  @media (max-width:768px){
    .wrap{padding:0 20px}
    :root{--space-section:60px}
    .page-hero{padding-top:28px}
    .page-title{font-size:32px;margin:16px 0 14px}
    .lead{font-size:16px}
    .banner{height:auto;min-height:220px;margin-top:28px}
    .banner-copy{position:relative;padding:28px 24px;max-width:100%}
    .banner-copy h2{font-size:21px}
    .banner::after{background:linear-gradient(180deg,rgba(244,247,250,.94) 0%,rgba(244,247,250,.72) 100%)}
    .sec-head h2{font-size:24px}
    .body-block h2{font-size:21px}
    .cta-panel{padding:32px 22px}
    .cta-panel h2{font-size:24px}
    .faq-q{font-size:15px;gap:10px}
    .faq-a-inner{padding-left:36px}
    .side-card{padding:22px}
  }
  @media (max-width:560px){
    .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
    .footer-bottom{flex-direction:column;gap:6px}
    .crumb .current{max-width:180px}
    .steps li{padding-left:36px}
    .hero-meta{gap:8px}
  }