/* roulang page: index */
:root{
  --primary:#0F6BB0;
  --primary-d:#0A4C7F;
  --primary-t:#E8F2FA;
  --accent:#FF7A45;
  --accent-d:#E8622C;
  --ink:#0F1B2A;
  --text:#4A5A6B;
  --muted:#7A8794;
  --line:#E6EBF1;
  --bg:#F5F8FB;
  --white:#FFFFFF;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --sh-sm:0 1px 2px rgba(15,27,42,.06);
  --sh-md:0 8px 24px rgba(15,27,42,.08);
  --sh-lg:0 18px 48px rgba(15,27,42,.10);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{color:var(--ink);margin:0 0 14px;font-weight:600;letter-spacing:0;line-height:1.3;}
h1{font-size:clamp(30px,4.2vw,52px);line-height:1.2;font-weight:700;}
h2{font-size:clamp(24px,2.6vw,32px);}
h3{font-size:20px;}
p{margin:0 0 18px;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--primary-d);}
img{max-width:100%;display:block;border:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}

.grid-container{max-width:1200px;padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto;width:100%;}
@media (min-width:1440px){.grid-container{max-width:1280px;}}
@media (max-width:639px){.grid-container{padding-left:20px;padding-right:20px;}}
.grid-padding-x{margin-left:-12px !important;margin-right:-12px !important;}
.grid-padding-x>.cell{padding-left:12px !important;padding-right:12px !important;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;background:var(--white);
  border-bottom:1px solid var(--line);transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-sm);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:20px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);flex:0 0 auto;}
.brand:hover{color:var(--ink);}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--primary-t);color:var(--primary);display:flex;align-items:center;justify-content:center;flex:0 0 auto;}
.brand-mark svg{width:20px;height:20px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.01em;}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--muted);letter-spacing:.08em;}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-links a{position:relative;font-size:15px;color:var(--text);padding:6px 0;font-weight:500;}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-links a:hover{color:var(--primary);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--primary);font-weight:600;}
.nav-links a.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;transition:background-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  white-space:nowrap;min-width:44px;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--sh-sm);}
.btn-primary:hover{background:var(--primary-d);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-outline{background:var(--white);border-color:var(--primary);color:var(--primary);}
.btn-outline:hover{background:var(--primary-t);color:var(--primary-d);}
.btn-link{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--primary);}
.btn-link i{transition:transform .18s ease;}
.btn-link:hover{color:var(--primary-d);}
.btn-link:hover i{transform:translateX(3px);}

/* ---------- Hero ---------- */
.hero{background:var(--primary-t);padding:76px 0 88px;position:relative;overflow:hidden;}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--line);}
.pill{
  display:inline-flex;align-items:center;gap:8px;background:var(--white);color:var(--primary);
  border:1px solid rgba(15,107,176,.22);border-radius:999px;padding:6px 14px;font-size:13px;font-weight:600;margin-bottom:22px;
}
.pill i{font-size:12px;}
.hero h1{max-width:620px;margin-bottom:18px;}
.hero-sub{font-size:17px;color:var(--text);max-width:520px;margin-bottom:28px;}
.hero-cta{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-bottom:34px;}
.trust{display:flex;gap:26px;flex-wrap:wrap;}
.trust li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text);font-weight:500;}
.trust i{color:var(--primary);font-size:14px;}
.hero-figure{position:relative;border-radius:var(--r-lg);overflow:visible;margin-top:12px;}
.hero-figure img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-md);}
.hero-float{
  position:absolute;right:-8px;bottom:-20px;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh-lg);padding:14px 20px;display:flex;flex-direction:column;
}
.hero-float .hf-num{font-size:22px;font-weight:700;color:var(--primary);line-height:1.2;}
.hero-float .hf-label{font-size:12.5px;color:var(--muted);}

/* ---------- Section basics ---------- */
.section{padding:96px 0;}
.section-alt{background:var(--white);}
.section-head{max-width:720px;margin-bottom:48px;}
.section-head p{margin:0;color:var(--text);}
.section-head.with-action{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;}
.section-head.with-action>div{max-width:640px;}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--primary);letter-spacing:.08em;margin-bottom:12px;}

/* ---------- Value ---------- */
.value-list{display:grid;grid-template-columns:repeat(3,1fr);gap:0;}
.value-list li{padding:0 28px;border-left:1px solid var(--line);}
.value-list li:first-child{padding-left:0;border-left:0;}
.value-list .idx{display:block;font-size:13px;font-weight:700;color:var(--primary);margin-bottom:10px;letter-spacing:.1em;}
.value-list h3{font-size:19px;margin-bottom:8px;}
.value-list p{font-size:14.5px;margin:0;color:var(--text);}

/* ---------- Feature cards ---------- */
.feature-card{
  background:var(--white);border:1px solid var(--line);border-left:4px solid var(--primary);
  border-radius:var(--r-md);padding:28px;height:100%;box-shadow:var(--sh-sm);
  transition:box-shadow .2s ease,transform .2s ease;margin-bottom:24px;
}
.feature-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px);}
.feature-icon{
  width:44px;height:44px;border-radius:12px;background:var(--primary-t);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:19px;margin-bottom:16px;
}
.feature-card h3{font-size:20px;margin-bottom:10px;}
.feature-card p{font-size:15px;margin-bottom:16px;}
.check-list li{display:flex;align-items:flex-start;gap:9px;font-size:14.5px;margin-bottom:8px;color:var(--text);}
.check-list li i{color:var(--primary);font-size:13px;margin-top:6px;}

/* ---------- Steps ---------- */
.steps-row{position:relative;}
.step-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;height:100%;box-shadow:var(--sh-sm);transition:box-shadow .2s ease,transform .2s ease;margin-bottom:24px;position:relative;
}
.step-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px);}
.step-num{
  position:absolute;top:-16px;left:20px;width:32px;height:32px;border-radius:50%;
  background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;box-shadow:var(--sh-sm);
}
.step-card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-sm);margin:18px 0 16px;}
.step-card h3{font-size:17px;margin-bottom:8px;}
.step-card p{font-size:14px;margin:0;}
@media (min-width:1024px){
  .steps-row::before{content:"";position:absolute;top:52px;left:8%;right:8%;height:1px;background:var(--line);z-index:0;}
}

/* ---------- Cases ---------- */
.case-main{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-md);height:100%;display:flex;flex-direction:column;
}
.case-main img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.case-main-body{padding:26px;position:relative;}
.tag{
  display:inline-block;background:var(--primary-t);color:var(--primary);font-size:12.5px;font-weight:600;
  border-radius:999px;padding:4px 12px;
}
.case-stat{display:flex;align-items:baseline;gap:12px;margin:16px 0 12px;}
.case-stat strong{font-size:32px;font-weight:700;color:var(--primary);line-height:1;}
.case-stat span{font-size:14px;color:var(--muted);}
.case-main blockquote{
  margin:0;padding:16px 20px;background:#F8FAFC;border-left:3px solid var(--primary);
  border-radius:0 var(--r-sm) var(--r-sm) 0;font-size:14.5px;color:var(--text);
}
.case-side{display:flex;flex-direction:column;gap:24px;height:100%;}
.case-mini{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-md);padding:24px;
  display:flex;align-items:center;gap:18px;box-shadow:var(--sh-sm);flex:1;
  transition:box-shadow .2s ease,transform .2s ease;
}
.case-mini:hover{box-shadow:var(--sh-md);transform:translateY(-2px);}
.case-mini .cm-icon{
  width:46px;height:46px;border-radius:12px;background:var(--primary-t);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:18px;flex:0 0 auto;
}
.case-mini h3{font-size:17px;margin-bottom:6px;}
.case-mini p{font-size:14px;margin:0;}
.case-mini .cm-num{font-size:20px;font-weight:700;color:var(--primary);}

/* ---------- Pricing ---------- */
.billing-tab{display:inline-flex;background:var(--white);border:1px solid var(--line);border-radius:999px;padding:4px;margin-bottom:40px;}
.billing-tab span{padding:8px 22px;border-radius:999px;font-size:14px;font-weight:600;color:var(--muted);}
.billing-tab span.active{background:var(--primary);color:#fff;}
.price-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-lg);padding:30px;
  height:100%;display:flex;flex-direction:column;box-shadow:var(--sh-sm);margin-bottom:24px;
  transition:box-shadow .2s ease,transform .2s ease;
}
.price-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px);}
.price-card.recommended{border:2px solid var(--primary);box-shadow:var(--sh-lg);position:relative;}
@media (min-width:1024px){.price-card.recommended{margin-top:-8px;}}
.rec-pill{
  position:absolute;top:-14px;left:30px;background:var(--accent);color:#fff;font-size:12.5px;font-weight:700;
  border-radius:999px;padding:4px 14px;
}
.price-card h3{font-size:19px;margin-bottom:6px;}
.price-card .price-desc{font-size:14px;color:var(--muted);margin-bottom:20px;}
.price-amount{display:flex;align-items:baseline;gap:6px;margin-bottom:22px;}
.price-amount strong{font-size:38px;font-weight:700;color:var(--ink);line-height:1;}
.price-amount span{font-size:14px;color:var(--muted);}
.price-card .check-list{margin-bottom:26px;flex:1;}
.check-list li.off{color:#A9B4C0;}
.check-list li.off i{color:#C4CDD7;}
.price-card .btn{width:100%;}

/* ---------- News ---------- */
.news-card{
  display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;height:100%;box-shadow:var(--sh-sm);
  transition:box-shadow .2s ease,transform .2s ease;margin-bottom:24px;color:var(--text);
}
.news-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px);color:var(--text);}
.news-cover{position:relative;background:var(--primary-t);}
.news-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.news-cover .tag-float{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94);}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.news-body h3{
  font-size:16.5px;line-height:1.55;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body p{
  font-size:14px;color:var(--muted);margin:0 0 16px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--muted);padding-top:14px;border-top:1px solid var(--line);
}
.news-meta i{color:var(--primary);transition:transform .18s ease;}
.news-card:hover .news-meta i{transform:translateX(3px);}
.empty-state{
  background:var(--white);border:1px dashed var(--line);border-radius:var(--r-md);
  padding:56px 24px;text-align:center;width:100%;
}
.empty-state i{font-size:44px;color:rgba(15,107,176,.28);margin-bottom:16px;}
.empty-state p{margin-bottom:18px;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{background:var(--white);border:1px solid var(--line);border-radius:var(--r-md);margin-bottom:14px;overflow:hidden;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:transparent;border:0;min-height:56px;padding:14px 24px;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);
}
.faq-q:hover{color:var(--primary);}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--primary-t);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:600;
  transition:transform .2s ease;
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--primary);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease;background:#F8FAFC;border-left:3px solid var(--primary);}
.faq-item.open .faq-a{max-height:340px;}
.faq-a p{margin:0;padding:18px 24px;font-size:14.8px;color:var(--text);}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--primary);border-radius:var(--r-lg);padding:48px 52px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:var(--sh-lg);
}
.cta-band h2{color:#fff;margin-bottom:8px;}
.cta-band p{color:rgba(255,255,255,.86);margin:0;}
.cta-band .btn-primary{background:#fff;color:var(--primary);}
.cta-band .btn-primary:hover{background:#F1F6FB;color:var(--primary-d);}

/* ---------- Footer ---------- */
.site-footer{background:#0F1B2A;color:#C7D2DE;padding:72px 0 0;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.08);color:#7FB6E0;}
.footer-brand strong{color:#fff;font-size:16px;}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:18px;letter-spacing:.02em;}
.footer-col p{font-size:13.5px;color:#C7D2DE;line-height:1.9;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:13.5px;color:#C7D2DE;}
.footer-col ul a:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.12);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:#8B9AAB;
}
.footer-bottom a{color:#8B9AAB;}
.footer-bottom a:hover{color:#fff;}

/* ---------- Mobile bottom tab ---------- */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:90;display:none;
  background:var(--white);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab a{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:56px;font-size:10.5px;color:var(--muted);position:relative;
}
.mobile-tab a i{font-size:19px;}
.mobile-tab a.active{color:var(--primary);}
.mobile-tab a.active::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:24px;height:3px;border-radius:0 0 3px 3px;background:var(--primary);}

/* ---------- Responsive ---------- */
@media (max-width:1023px){
  .nav-links,.nav-actions{display:none;}
  .mobile-tab{display:flex;}
  body{padding-bottom:56px;}
  .section{padding:72px 0;}
  .value-list{grid-template-columns:1fr;}
  .value-list li{padding:0 0 24px;border-left:0;border-top:1px solid var(--line);padding-top:24px;}
  .value-list li:first-child{border-top:0;padding-top:0;}
  .case-side{margin-top:24px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 30px;}
  .site-footer{margin-top:72px;}
}
@media (max-width:639px){
  .section{padding:56px 0;}
  .hero{padding:56px 0 64px;}
  .hero-sub{font-size:15.5px;}
  .hero-float{right:12px;bottom:-16px;padding:12px 16px;}
  .trust{gap:14px 22px;}
  .section-head{margin-bottom:32px;}
  .section-head.with-action{flex-direction:column;align-items:flex-start;}
  .price-card{padding:24px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .cta-band{padding:30px 22px;border-radius:var(--r-md);}
  .faq-q{padding:14px 18px;font-size:15px;}
  .faq-a p{padding:16px 18px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}

/* roulang page: article */
:root{
  --primary:#0F6BB0;
  --primary-d:#0A4C7F;
  --primary-t:#E8F2FA;
  --accent:#FF7A45;
  --accent-h:#E8622C;
  --ink:#0F1B2A;
  --text:#4A5A6B;
  --muted:#7A8794;
  --line:#E6EBF1;
  --bg:#F5F8FB;
  --white:#FFFFFF;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --pill:999px;
  --sh-sm:0 1px 2px rgba(15,27,42,.06);
  --sh-md:0 8px 24px rgba(15,27,42,.08);
  --sh-lg:0 18px 48px rgba(15,27,42,.10);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--primary);}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:600;letter-spacing:0.01em;}
p{margin:0 0 18px;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.grid-container{max-width:var(--container);margin:0 auto;padding-left:20px;padding-right:20px;width:100%;}
@media (min-width:1440px){.grid-container{max-width:1280px;}}
main{display:block;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:0.01em;cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--sh-sm);}
.btn-primary:hover,.btn-primary:focus{background:var(--primary-d);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary);}
.btn-outline:hover,.btn-outline:focus{background:var(--primary-t);color:var(--primary-d);}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover,.btn-accent:focus{background:var(--accent-h);color:#fff;transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:9px;}
.btn-ghost{
  display:inline-flex;align-items:center;gap:6px;height:44px;
  color:var(--primary);font-weight:600;font-size:15px;background:none;border:0;padding:0 2px;cursor:pointer;
}
.btn-ghost .arrow{transition:transform .18s ease;}
.btn-ghost:hover .arrow,.btn-ghost:focus .arrow{transform:translateX(3px);}

/* ============ 标签 ============ */
.pill{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;
  border-radius:var(--pill);background:var(--primary-t);color:var(--primary-d);
  font-size:12.5px;font-weight:600;line-height:1;white-space:nowrap;
}
.pill.accent{background:#FFF1E9;color:var(--accent-h);}
.pill.mint{background:#E6F7F1;color:#12795C;}
.pill.ghost{background:#fff;border:1px solid var(--line);color:var(--muted);}
.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--pill);
  border:1px solid var(--line);background:#fff;color:var(--text);font-size:13px;
  transition:border-color .18s ease,color .18s ease,background-color .18s ease;
}
.tag:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-t);}
.tag.is-active{background:var(--primary);border-color:var(--primary);color:#fff;}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-sm);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;background:var(--primary-t);color:var(--primary);
  display:inline-flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:16px;color:var(--ink);font-weight:700;letter-spacing:0.01em;}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--muted);letter-spacing:0.06em;}
.nav-links{display:flex;align-items:center;gap:30px;}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--ink);
  padding:23px 0;transition:color .16s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:16px;height:2px;background:var(--primary);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-links a:hover{color:var(--primary);}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{color:var(--primary);font-weight:600;}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}

/* ============ 移动底部 Tab ============ */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:80;display:none;
  background:#fff;border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab .tab-item{
  flex:1 1 0;position:relative;height:56px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:3px;color:var(--muted);font-size:10px;
}
.mobile-tab .tab-item svg{width:22px;height:22px;}
.mobile-tab .tab-item.active{color:var(--primary);}
.mobile-tab .tab-item.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:3px;border-radius:0 0 3px 3px;background:var(--primary);
}

/* ============ 文章头部 ============ */
.article-hero{
  background:var(--primary-t);border-bottom:1px solid var(--line);
  padding:34px 0 44px;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);margin-bottom:18px;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:#C3CCD6;}
.breadcrumb .current{color:var(--text);}
.article-hero h1{
  font-size:clamp(28px,3.6vw,42px);line-height:1.28;font-weight:700;
  max-width:880px;margin-bottom:16px;
}
.meta-line{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13px;color:var(--muted);}
.meta-line span{display:inline-flex;align-items:center;gap:6px;}
.meta-line span + span::before{
  content:"";width:1px;height:12px;background:#C9D4DF;margin-right:6px;
  display:inline-block;
}

/* ============ 文章布局 ============ */
.article-main{padding:56px 0 88px;}
.article-layout{align-items:flex-start;}
.article-col{min-width:0;}
.article-body{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-sm);padding:36px 38px 30px;
}
.article-body p{font-size:16.5px;line-height:1.95;color:var(--text);margin:0 0 18px;}
.article-body h2{
  font-size:22px;line-height:1.4;margin:40px 0 16px;padding-left:14px;
  border-left:4px solid var(--primary);color:var(--ink);
}
.article-body h2:first-child{margin-top:0;}
.article-body h3{font-size:18px;line-height:1.5;margin:28px 0 12px;color:var(--ink);}
.article-body h4{font-size:16.5px;margin:22px 0 10px;color:var(--ink);}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;background:#F1F9F6;border-left:4px solid var(--primary);
  border-radius:0 var(--r-sm) var(--r-sm) 0;color:#2A4453;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px;list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{font-size:16px;line-height:1.9;margin-bottom:8px;color:var(--text);}
.article-body li::marker{color:var(--primary);}
.article-body a{color:var(--primary);border-bottom:1px dashed var(--primary);}
.article-body a:hover{border-bottom-style:solid;}
.article-body img{border-radius:12px;margin:22px auto 10px;}
.article-body figure{margin:24px 0;}
.article-body figcaption{text-align:center;font-size:13px;color:var(--muted);margin-top:12px;}
.article-body table{
  width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
}
.article-body th{background:var(--primary-t);color:var(--primary-d);text-align:left;font-weight:600;}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);}
.article-body tbody tr:nth-child(even){background:#F8FAFC;}
.article-body tbody tr:last-child td{border-bottom:0;}
.article-body code{
  background:#EEF3F8;border-radius:6px;padding:2px 6px;font-size:14px;color:var(--primary-d);
}

/* 空态 */
.empty-state{
  text-align:center;padding:56px 20px;border:1px dashed var(--line);border-radius:var(--r-md);
  background:#FBFDFF;
}
.empty-state .empty-icon{
  width:56px;height:56px;margin:0 auto 16px;border-radius:16px;
  background:var(--primary-t);color:var(--primary);display:flex;align-items:center;justify-content:center;
}
.empty-state .empty-icon svg{width:26px;height:26px;}
.empty-state h3{font-size:19px;margin-bottom:8px;}
.empty-state p{font-size:14.5px;color:var(--muted);margin-bottom:22px;}

/* ============ 侧栏 ============ */
.side-col{min-width:0;}
.side-sticky{position:sticky;top:88px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-sm);padding:24px;
}
.side-card h3{
  font-size:15px;font-weight:700;color:var(--ink);margin-bottom:16px;
  display:flex;align-items:center;gap:8px;
}
.side-card h3::before{
  content:"";width:4px;height:14px;border-radius:2px;background:var(--primary);
}
.side-list li{border-bottom:1px solid var(--line);}
.side-list li:last-child{border-bottom:0;}
.side-list a{
  display:flex;gap:10px;padding:13px 0;font-size:14.5px;color:var(--text);line-height:1.6;
}
.side-list a:hover{color:var(--primary);}
.side-list .idx{
  flex:0 0 auto;width:22px;height:22px;border-radius:7px;background:var(--primary-t);
  color:var(--primary);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.side-list .idx.hot{background:#FFF1E9;color:var(--accent-h);}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;}

/* ============ 相关推荐 ============ */
.section-block{margin-top:56px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px;}
.section-head h2{font-size:clamp(22px,2.4vw,28px);line-height:1.35;}
.section-head p{font-size:14px;color:var(--muted);margin:8px 0 0;}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.rel-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-sm);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:#D6E2EE;color:inherit;}
.rel-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--primary-t);}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;}
.rel-card .rel-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-card h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-card p{
  font-size:14px;color:var(--muted);line-height:1.75;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-card .rel-foot{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);
}
.rel-card:hover .rel-foot .arrow{transform:translateX(3px);color:var(--primary);}
.rel-foot .arrow{transition:transform .18s ease;}

/* ============ 上一篇 / 下一篇 ============ */
.pager{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:32px;}
.pager-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px 22px;box-shadow:var(--sh-sm);display:flex;flex-direction:column;gap:8px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.pager-item:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:#D6E2EE;color:inherit;}
.pager-item .dir{font-size:12.5px;color:var(--muted);display:flex;align-items:center;gap:6px;}
.pager-item strong{font-size:15.5px;color:var(--ink);font-weight:600;line-height:1.55;}
.pager-item.next{text-align:right;align-items:flex-end;}
.pager-item.next .dir{flex-direction:row-reverse;}

.back-row{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 底部 CTA ============ */
.cta-band{
  margin-top:72px;background:var(--primary);border-radius:var(--r-lg);
  padding:44px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:var(--sh-lg);overflow:hidden;position:relative;
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);line-height:1.35;margin-bottom:10px;max-width:620px;}
.cta-band p{color:#D3E6F5;font-size:15px;margin:0;max-width:620px;}
.cta-band .btn-outline{background:#fff;border-color:#fff;color:var(--primary);}
.cta-band .btn-outline:hover{background:#EAF4FC;color:var(--primary-d);}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:0 0 auto;}

/* ============ 页脚 ============ */
.site-footer{background:#0F1B2A;color:#C7D2DE;margin-top:88px;padding-top:64px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.08);color:#7FB8E4;}
.footer-brand strong{color:#fff;font-size:16px;font-weight:700;}
.footer-col p{font-size:13.5px;line-height:1.85;color:#9FB0C0;margin:0;}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:18px;}
.footer-col ul li{margin-bottom:11px;}
.footer-col ul a{font-size:13.5px;color:#C7D2DE;transition:color .16s ease;}
.footer-col ul a:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.12);padding:22px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:#8B9AA9;
}

/* ============ 响应式 ============ */
@media (min-width:1024px){
  .mobile-tab{display:none;}
}
@media (max-width:1023px){
  .mobile-tab{display:flex;}
  body{padding-bottom:72px;}
  .nav-links{display:none;}
  .nav-actions .btn-outline{display:none;}
  .article-main{padding:36px 0 64px;}
  .article-body{padding:28px 24px 22px;}
  .side-sticky{position:static;}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-band{padding:34px 30px;flex-direction:column;align-items:flex-start;}
}
@media (max-width:767px){
  .article-hero{padding:26px 0 32px;}
  .article-body p{font-size:16px;}
  .article-body h2{font-size:20px;margin-top:32px;}
  .pager{grid-template-columns:1fr;}
  .pager-item.next{text-align:left;align-items:flex-start;}
  .pager-item.next .dir{flex-direction:row;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
}
@media (max-width:639px){
  .rel-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-band{padding:28px 22px;border-radius:var(--r-md);}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .brand-text strong{font-size:15px;}
  .nav-actions .btn-primary{height:38px;padding:0 14px;font-size:13.5px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --primary:#0F6BB0;
  --primary-d:#0A4C7F;
  --primary-t:#E8F2FA;
  --accent:#FF7A45;
  --accent-h:#E8622C;
  --ink:#0F1B2A;
  --text:#4A5A6B;
  --muted:#7A8794;
  --line:#E6EBF1;
  --bg:#F5F8FB;
  --white:#FFFFFF;
  --mint:#2FBFA0;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --pill:999px;
  --sh-sm:0 1px 2px rgba(15,27,42,.06);
  --sh-md:0 8px 24px rgba(15,27,42,.08);
  --sh-lg:0 18px 48px rgba(15,27,42,.10);
  --t:200ms cubic-bezier(.4,0,.2,1);
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box;min-width:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;border:0}
a{color:var(--primary);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--primary-d)}
p{margin:0 0 18px}
p:last-child{margin-bottom:0}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:.005em}
ul,ol{margin:0;padding:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
::selection{background:var(--primary-t);color:var(--primary-d)}

/* ============ 容器 ============ */
.grid-container{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;width:100%}
@media (min-width:1440px){
  .grid-container{max-width:1280px}
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--white);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t);
}
.site-header.is-scrolled{box-shadow:var(--sh-sm)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  background:var(--primary-t);color:var(--primary);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.01em}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--muted);letter-spacing:.14em;margin-top:2px}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:68px;
  padding:0 15px;font-size:15px;font-weight:500;color:var(--text);
}
.nav-links a::after{
  content:"";position:absolute;left:15px;right:15px;bottom:-1px;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left center;
  transition:transform var(--t);
}
.nav-links a:hover{color:var(--primary)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--primary);font-weight:600}
.nav-links a.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--pill);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;white-space:nowrap;text-align:center;
  transition:background-color var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:52px;padding:0 30px;font-size:16px}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-d);border-color:var(--primary-d);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-outline{background:var(--white);color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary-t);color:var(--primary-d);transform:translateY(-1px)}
.btn-white{background:#fff;color:var(--primary);border-color:#fff}
.btn-white:hover{background:var(--primary-t);color:var(--primary-d);transform:translateY(-1px)}
.btn-accent{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-h);border-color:var(--accent-h);color:#fff;transform:translateY(-1px)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:6px;height:auto;padding:0;
  background:none;border:0;color:var(--primary);font-size:15px;font-weight:600;cursor:pointer;
}
.btn-ghost svg{width:16px;height:16px;transition:transform var(--t)}
.btn-ghost:hover{color:var(--primary-d)}
.btn-ghost:hover svg{transform:translateX(3px)}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:var(--pill);
  background:var(--primary-t);color:var(--primary-d);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.badge-dot{width:6px;height:6px;border-radius:50%;background:var(--mint);display:inline-block}
.tag{
  display:inline-flex;align-items:center;padding:4px 11px;border-radius:var(--pill);
  background:var(--primary-t);color:var(--primary-d);
  font-size:12px;font-weight:600;letter-spacing:.02em;
}
.tag-mint{background:rgba(47,191,160,.12);color:#1E8A72}

/* ============ 分类小 Hero ============ */
.cat-hero{background:#F2F8FC;border-bottom:1px solid var(--line);padding:32px 0 64px}
.crumbs{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);margin-bottom:26px;flex-wrap:wrap}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--primary)}
.crumbs .sep{color:#B7C2CD}
.hero-row{gap:48px}
.hero-copy{width:100%}
.hero-media{width:100%;position:relative}
.hero-copy h1{
  font-size:clamp(30px,4.2vw,50px);line-height:1.2;font-weight:700;
  margin:18px 0 16px;max-width:16em;
}
.hero-sub{font-size:17px;line-height:1.75;color:var(--text);max-width:30em;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px}
.hero-media img{
  width:100%;aspect-ratio:3/2;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line);
}
.hero-note{
  position:absolute;right:16px;bottom:16px;
  background:#fff;border-radius:var(--r-md);box-shadow:var(--sh-lg);
  padding:14px 18px;display:flex;flex-direction:column;gap:2px;max-width:220px;
}
.hero-note strong{font-size:18px;color:var(--ink);font-weight:700}
.hero-note span{font-size:12.5px;color:var(--muted);line-height:1.5}

/* ============ 通用板块 ============ */
.section{padding:88px 0}
.section-white{background:var(--white)}
.section-head{max-width:720px;margin-bottom:52px}
.section-head h2{font-size:clamp(24px,3vw,34px);line-height:1.3;font-weight:600;margin-bottom:14px}
.section-head p{font-size:16px;color:var(--text);margin:0}
.section-head-inline{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:48px;flex-wrap:wrap}
.section-head-inline h2{font-size:clamp(24px,3vw,34px);line-height:1.3;font-weight:600}

/* ============ 图文交替 ============ */
.feature-row{gap:56px}
.feature-row + .feature-row{margin-top:76px}
.feature-media{width:100%}
.feature-copy{width:100%}
.feature-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-md);border:1px solid var(--line);
}
.colorcard{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--primary);
  border-radius:var(--r-md);padding:28px;box-shadow:var(--sh-sm);
  transition:box-shadow var(--t),transform var(--t);
}
.colorcard:hover{box-shadow:var(--sh-md);transform:translateY(-2px)}
.colorcard h3{font-size:21px;line-height:1.4;font-weight:600;margin:14px 0 14px}
.colorcard p{font-size:15.5px;line-height:1.85}
.checklist{list-style:none;margin:18px 0 22px}
.checklist li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:15px;color:var(--text);padding:5px 0;line-height:1.7;
}
.checklist li::before{
  content:"";flex:0 0 20px;width:20px;height:20px;margin-top:6px;border-radius:50%;
  background-color:var(--primary-t);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230F6BB0' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:center;background-size:12px 12px;
}

/* ============ 核对清单板块 ============ */
.points{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.point-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.point-item{
  display:flex;gap:18px;
  background:var(--bg);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;transition:background-color var(--t),border-color var(--t),transform var(--t)
}
.point-item:hover{background:#fff;border-color:#D6E2EE;transform:translateY(-2px)}
.point-num{
  font-size:19px;font-weight:700;color:var(--primary);
  letter-spacing:.04em;line-height:1.5;flex:0 0 auto;
}
.point-item h3{font-size:17px;font-weight:600;margin-bottom:6px;line-height:1.5}
.point-item p{font-size:14.5px;line-height:1.8;color:var(--text);margin:0}

/* ============ CTA 带 ============ */
.cta-zone{padding:0 0 88px}
.cta-band{
  background:var(--primary);border-radius:var(--r-lg);
  padding:48px 44px;display:flex;align-items:center;justify-content:space-between;
  gap:32px;box-shadow:var(--sh-lg);
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);color:#fff;line-height:1.35;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.82);font-size:15.5px;margin:0;max-width:52em}

/* ============ 相关分类互链 ============ */
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.rel-card{
  display:flex;flex-direction:column;gap:10px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px;box-shadow:var(--sh-sm);
  transition:box-shadow var(--t),transform var(--t),border-color var(--t);
}
.rel-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px);border-color:#D6E2EE}
.rel-card h3{font-size:18px;font-weight:600;color:var(--ink);line-height:1.5}
.rel-card p{font-size:14.5px;color:var(--text);margin:0;line-height:1.8;flex:1}
.rel-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary)}
.rel-more svg{width:15px;height:15px;transition:transform var(--t)}
.rel-card:hover .rel-more svg{transform:translateX(3px)}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#C7D2DE;padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.08);color:#7FC3F0}
.footer-brand strong{color:#fff;font-size:16px;font-weight:700}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.02em}
.footer-col p{font-size:13.5px;line-height:1.9;color:#C7D2DE;margin:0}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:13.5px;color:#C7D2DE}
.footer-col ul a:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  margin-top:56px;padding:22px 0 30px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:#93A3B4;
}

/* ============ 移动底部 Tab ============ */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;
  background:#fff;border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom,0);
  box-shadow:0 -2px 12px rgba(15,27,42,.05);
}
.mobile-tab a{
  position:relative;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;height:56px;font-size:10.5px;color:var(--muted);font-weight:500;
}
.mobile-tab a svg{width:22px;height:22px;stroke-width:1.8}
.mobile-tab a.active{color:var(--primary)}
.mobile-tab a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:3px;border-radius:0 0 3px 3px;background:var(--primary);
}

/* ============ 桌面断点 ============ */
@media (min-width:1024px){
  .hero-copy{width:calc(58% - 24px)}
  .hero-media{width:calc(42% - 24px)}
  .feature-row > .feature-media{width:calc(50% - 28px)}
  .feature-row > .feature-copy{width:calc(50% - 28px)}
  .feature-row.reverse > .feature-media{order:2}
  .feature-row.reverse > .feature-copy{order:1}
}

/* ============ 平板断点 ============ */
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-actions .btn-outline{display:none}
  .mobile-tab{display:flex}
  body{padding-bottom:80px}
  .cat-hero{padding:24px 0 48px}
  .hero-row{gap:32px}
  .section{padding:64px 0}
  .feature-row + .feature-row{margin-top:56px}
  .cta-zone{padding:0 0 64px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 28px;gap:24px}
  .rel-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .point-list{grid-template-columns:1fr}
}

/* ============ 手机断点 ============ */
@media (max-width:639px){
  .grid-container{padding-left:16px;padding-right:16px}
  .nav-inner{height:62px}
  .brand-text strong{font-size:15px}
  .brand-text em{font-size:10.5px;letter-spacing:.1em}
  .hero-copy h1{font-size:28px;margin:14px 0 12px}
  .hero-sub{font-size:15.5px}
  .hero-actions{flex-direction:column;align-items:stretch;gap:12px}
  .hero-actions .btn{width:100%}
  .hero-actions .btn-ghost{justify-content:center}
  .hero-note{right:12px;bottom:12px;padding:12px 14px;max-width:180px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .rel-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .colorcard{padding:22px}
  .cta-band{padding:30px 22px;border-radius:var(--r-md)}
  .point-item{padding:20px;gap:14px}
}

/* ============ 动效降级 ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none !important;animation:none !important}
}

/* roulang page: category2 */
:root{
  --primary:#0F6BB0;
  --primary-d:#0A4C7F;
  --primary-t:#E8F2FA;
  --accent:#FF7A45;
  --accent-d:#E8622C;
  --ink:#0F1B2A;
  --text:#4A5A6B;
  --muted:#7A8794;
  --line:#E6EBF1;
  --bg:#F5F8FB;
  --card:#FFFFFF;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --pill:999px;
  --sh-sm:0 1px 2px rgba(15,27,42,.06);
  --sh-md:0 8px 24px rgba(15,27,42,.08);
  --sh-lg:0 18px 48px rgba(15,27,42,.10);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--primary-d)}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:600;letter-spacing:.01em;line-height:1.3}
h1{font-size:clamp(30px,4.2vw,52px);font-weight:700;line-height:1.2}
h2{font-size:clamp(24px,2.6vw,32px)}
h3{font-size:20px}
p{margin:0 0 18px}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
.grid-container{max-width:var(--maxw);margin:0 auto;padding-left:20px;padding-right:20px;width:100%}
@media(min-width:1440px){.grid-container{max-width:1280px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--pill);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;transition:all .18s ease;white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-d);border-color:var(--primary-d);color:#fff;transform:translateY(-1px)}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary-t);color:var(--primary-d)}
.btn-accent{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-accent:hover{background:var(--accent-d);border-color:var(--accent-d);color:#fff;transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px}
.link-arrow i{transition:transform .18s ease}
.link-arrow:hover i{transform:translateX(3px)}

/* ---------- 头部导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-scrolled{box-shadow:var(--sh-sm)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{width:34px;height:34px;flex:0 0 34px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;background:var(--primary-t);color:var(--primary)}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:0}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--muted);letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  position:relative;display:inline-block;padding:10px 14px;font-size:15px;color:var(--text);font-weight:500;
}
.nav-links a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:var(--primary);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-links a:hover{color:var(--primary)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--primary);font-weight:600}
.nav-links a.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:10px}

/* ---------- 分类小 Hero ---------- */
.cat-hero{background:#fff;border-bottom:1px solid var(--line);padding:40px 0 56px}
.crumb{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);margin-bottom:18px;flex-wrap:wrap}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.crumb span.sep{color:#C4CFDA}
.cat-hero-inner{display:flex;align-items:center;gap:48px}
.cat-hero-copy{flex:1 1 56%}
.cat-hero-copy h1{max-width:14em}
.cat-hero-copy .lead{font-size:17px;color:var(--text);margin-top:16px;max-width:30em}
.cat-hero-actions{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap}
.cat-hero-media{flex:1 1 44%;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-md)}
.cat-hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px}
.tag{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--pill);background:var(--primary-t);color:var(--primary-d);font-size:12.5px;font-weight:600;line-height:1.6}
.tag-accent{background:#FFF1EA;color:var(--accent-d)}
.tag-plain{background:#F2F6FA;color:var(--muted)}

/* ---------- 筛选标签条 ---------- */
.filter-band{background:#fff;border-bottom:1px solid var(--line);padding:16px 0}
.filter-scroll{display:flex;gap:10px;overflow-x:auto;white-space:nowrap;padding-bottom:4px;scrollbar-width:thin}
.filter-scroll::-webkit-scrollbar{height:5px}
.filter-scroll::-webkit-scrollbar-thumb{background:#D7E1EA;border-radius:99px}
.chip{
  display:inline-flex;align-items:center;gap:6px;flex:0 0 auto;
  padding:8px 18px;border-radius:var(--pill);border:1px solid var(--line);background:#fff;
  color:var(--text);font-size:14px;font-weight:500;cursor:pointer;transition:all .18s ease;
}
.chip:hover{border-color:var(--primary);color:var(--primary)}
.chip.is-on{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}

/* ---------- 数据条 ---------- */
.stat-strip{display:flex;flex-wrap:wrap;gap:12px;padding:28px 0 0}
.stat{
  flex:1 1 200px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:18px 22px;box-shadow:var(--sh-sm);
}
.stat strong{display:block;font-size:26px;font-weight:700;color:var(--primary-d);line-height:1.25}
.stat span{font-size:13px;color:var(--muted)}

/* ---------- 区块 ---------- */
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head .eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--primary);letter-spacing:.08em;margin-bottom:10px}
.section-head p{margin-top:14px;font-size:16.5px}

/* ---------- 卡片网格 ---------- */
.path-grid{margin-top:8px}
.path-grid > .cell{margin-bottom:24px}
.pcard{
  display:flex;flex-direction:column;height:100%;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  box-shadow:var(--sh-sm);transition:transform .2s ease,box-shadow .2s ease;
}
.pcard:hover{transform:translateY(-2px);box-shadow:var(--sh-md)}
.pc-media{position:relative;overflow:hidden;background:var(--primary-t)}
.pc-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease}
.pcard:hover .pc-media img{transform:scale(1.03)}
.pc-media .tag{position:absolute;left:14px;top:14px;background:#fff;color:var(--primary-d);box-shadow:var(--sh-sm)}
.pc-body{padding:24px;display:flex;flex-direction:column;flex:1 1 auto}
.pc-body h3{font-size:19px;margin-bottom:10px}
.pc-body > p{font-size:14.5px;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pc-foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted)}
.pcard-wide{flex-direction:row}
.pcard-wide .pc-media{flex:0 0 42%;display:flex}
.pcard-wide .pc-media img{height:100%;aspect-ratio:auto}
.pcard-wide .pc-body{flex:1 1 58%;padding:28px}
.pcard-wide h3{font-size:21px}
.pcard-wide .pc-body > p{-webkit-line-clamp:3;font-size:15px}
.dot-list{margin:14px 0 0;display:flex;flex-wrap:wrap;gap:8px 18px}
.dot-list li{position:relative;padding-left:20px;font-size:14px;color:var(--text)}
.dot-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  background:var(--primary-t);border:2px solid var(--primary);
}
.inline-cta{margin-top:18px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:0 auto}
.faq{border:1px solid var(--line);border-radius:var(--r-md);background:#fff;overflow:hidden;box-shadow:var(--sh-sm)}
.faq-item + .faq-item{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;padding:16px 24px;background:transparent;border:0;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--ink);text-align:left;line-height:1.55;
}
.faq-q:hover{color:var(--primary)}
.faq-icon{position:relative;flex:0 0 18px;width:18px;height:18px;transition:transform .2s ease}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{top:0;left:8px;width:2px;height:18px;transition:opacity .2s ease}
.faq-item.open .faq-icon{transform:rotate(90deg)}
.faq-item.open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-item.open .faq-a{max-height:420px}
.faq-a-inner{padding:2px 24px 24px 24px;margin:0 24px 0 21px;border-left:3px solid var(--primary);background:#F8FAFC;border-radius:0 var(--r-sm) var(--r-sm) 0}
.faq-a-inner p{font-size:15px;color:var(--text);padding-top:14px}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--primary);border-radius:var(--r-lg);padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:var(--sh-lg);
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.4vw,28px);max-width:20em}
.cta-band p{color:#D6E9F8;margin-top:10px;font-size:15px;max-width:34em}
.cta-band .btn-primary{background:#fff;color:var(--primary-d);border-color:#fff}
.cta-band .btn-primary:hover{background:#EAF4FC;border-color:#EAF4FC;color:var(--primary-d)}
.cta-band .btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.cta-band .btn-outline:hover{background:rgba(255,255,255,.14);color:#fff}

/* ---------- 相关分类互链 ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--primary);
  border-radius:var(--r-md);padding:24px;box-shadow:var(--sh-sm);
  transition:transform .2s ease,box-shadow .2s ease;display:block;color:inherit;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);color:inherit}
.rel-card h3{font-size:18px;margin-bottom:8px}
.rel-card p{font-size:14px;color:var(--text)}
.rel-card .link-arrow{margin-top:16px;font-size:14px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#C7D2DE;margin-top:96px;padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.08);color:#8FC6EA}
.footer-brand strong{color:#fff;font-size:16px;font-weight:700}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.02em}
.footer-col p{font-size:13.5px;line-height:1.9;color:#C7D2DE}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:13.5px;color:#C7D2DE}
.footer-col ul a:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  margin-top:56px;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:12.5px;color:#93A3B4;
}

/* ---------- 移动底部 Tab ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;
  background:#fff;border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -4px 18px rgba(15,27,42,.06);
}
.tabbar-inner{display:grid;grid-template-columns:repeat(4,1fr)}
.tab{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  height:56px;font-size:10.5px;color:var(--muted);font-weight:500;
}
.tab i{font-size:19px;line-height:1}
.tab::before{content:"";position:absolute;top:0;left:24%;right:24%;height:3px;border-radius:0 0 3px 3px;background:transparent}
.tab.active{color:var(--primary);font-weight:600}
.tab.active::before{background:var(--primary)}

/* ---------- 响应式 ---------- */
@media(max-width:1023px){
  .nav-links{display:none}
  .nav-actions .btn-outline{display:none}
  .tabbar{display:block}
  body{padding-bottom:80px}
  .cat-hero-inner{flex-direction:column;gap:28px;align-items:flex-start}
  .cat-hero-copy,.cat-hero-media{flex:1 1 auto;width:100%}
  .pcard-wide{flex-direction:column}
  .pcard-wide .pc-media{flex:0 0 auto}
  .pcard-wide .pc-media img{height:auto;aspect-ratio:16/9}
  .rel-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section{padding:64px 0}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 28px}
}
@media(max-width:767px){
  .stat{flex:1 1 100%}
  .rel-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cat-hero{padding:28px 0 40px}
  .section{padding:56px 0}
  .pcard-body{padding:20px}
  .cta-band{border-radius:var(--r-md)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media(max-width:519px){
  .brand-text strong{font-size:15px}
  .nav-actions .btn-sm{padding:0 14px}
}
@media(prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category3 */
:root{
  --primary:#0F6BB0;
  --primary-d:#0A4C7F;
  --primary-t:#E8F2FA;
  --accent:#FF7A45;
  --accent-d:#E8622C;
  --ink:#0F1B2A;
  --body:#4A5A6B;
  --muted:#7A8794;
  --line:#E6EBF1;
  --bg:#F5F8FB;
  --white:#FFFFFF;
  --mint:#E7F5EF;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --pill:999px;
  --sh-sm:0 1px 2px rgba(15,27,42,.06);
  --sh-md:0 8px 24px rgba(15,27,42,.08);
  --sh-lg:0 18px 48px rgba(15,27,42,.10);
  --fs:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--fs);
  font-size:16px;
  line-height:1.85;
  color:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease}
a:hover{color:var(--primary-d)}
h1,h2,h3,h4{margin:0;color:var(--ink);font-family:var(--fs);letter-spacing:0;line-height:1.35}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
.tabular{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}

/* 容器 */
.grid-container{
  width:100%;
  max-width:1200px;
  margin-left:auto;
  margin-right:auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:1440px){
  .grid-container{max-width:1280px}
}
.grid-padding-x{margin-left:-12px;margin-right:-12px}
.grid-padding-x>.cell{padding-left:12px;padding-right:12px}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 22px;
  border-radius:var(--pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--sh-sm)}
.btn-primary:hover{background:var(--primary-d);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary-t);color:var(--primary-d);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--primary);padding:0;min-height:auto;font-weight:600}
.btn-ghost .arw{display:inline-block;transition:transform .18s ease}
.btn-ghost:hover .arw{transform:translateX(3px)}
.btn:active{transform:translateY(0)}

/* 徽章 / 标签 */
.pill-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:32px;
  padding:0 14px;
  border-radius:var(--pill);
  background:#fff;
  border:1px solid var(--line);
  color:var(--primary-d);
  font-size:13px;
  font-weight:600;
}
.pill-badge::before{
  content:"";
  width:7px;height:7px;border-radius:50%;
  background:var(--accent);
}
.tag{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:var(--pill);
  background:var(--primary-t);
  color:var(--primary-d);
  font-size:12.5px;
  font-weight:600;
}

/* 顶部导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-sm)}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:68px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:36px;height:36px;
  flex:0 0 36px;
  border-radius:11px;
  background:var(--primary-t);
  color:var(--primary);
  display:grid;
  place-items:center;
}
.brand-mark svg{width:21px;height:21px}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:15.5px;font-weight:700;color:var(--ink);letter-spacing:.01em}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.14em}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  color:#2B3947;
  font-weight:500;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  height:2px;width:0;
  background:var(--primary);
  transition:width .2s ease;
}
.nav-links a:hover{color:var(--primary)}
.nav-links a:hover::after{width:100%}
.nav-links a.active{color:var(--primary);font-weight:600}
.nav-links a.active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:12px}

/* 移动底部 Tab */
.mobile-tab{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:70;
  background:#fff;
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -2px 12px rgba(15,27,42,.05);
}
.mobile-tab a{
  position:relative;
  flex:1 1 0;
  min-height:56px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  font-size:10px;
  color:var(--muted);
  font-weight:500;
}
.mobile-tab a svg{width:22px;height:22px}
.mobile-tab a::before{
  content:"";
  position:absolute;
  top:0;left:50%;
  width:0;height:3px;
  background:var(--primary);
  transition:width .18s ease;
  transform:translateX(-50%);
}
.mobile-tab a.active{color:var(--primary);font-weight:600}
.mobile-tab a.active::before{width:28px;border-radius:0 0 3px 3px}

/* 分类小 Hero */
.page-hero{
  background:var(--primary-t);
  padding:40px 0 52px;
  border-bottom:1px solid var(--line);
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  color:var(--muted);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:#C3CDD8}
.page-hero .hero-flex{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:40px;
}
.page-hero .hero-copy{max-width:660px}
.page-hero h1{
  font-size:clamp(28px,4vw,44px);
  font-weight:700;
  line-height:1.25;
  margin:16px 0 14px;
}
.page-hero .lead{
  font-size:16.5px;
  line-height:1.9;
  color:var(--body);
  max-width:600px;
}
.hero-media{
  position:relative;
  flex:0 0 340px;
  max-width:340px;
}
.hero-media img{
  width:100%;
  aspect-ratio:3/2;
  object-fit:cover;
  border-radius:var(--r-lg);
  border:1px solid #DCE7F2;
  box-shadow:var(--sh-md);
}
.media-badge{
  position:absolute;
  right:-10px;bottom:-18px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:12px 18px;
  box-shadow:var(--sh-lg);
  display:flex;
  flex-direction:column;
  line-height:1.4;
}
.media-badge span{font-size:11.5px;color:var(--muted);letter-spacing:.08em}
.media-badge strong{font-size:16px;color:var(--ink);font-variant-numeric:tabular-nums}

/* 主体布局 */
.section-main{padding:72px 0 88px}
.toc{
  position:sticky;
  top:92px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:20px 16px;
  box-shadow:var(--sh-sm);
}
.toc-title{
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--muted);
  margin:0 0 12px;
  padding-left:12px;
}
.toc-link{
  display:block;
  padding:11px 12px;
  border-left:3px solid transparent;
  border-radius:0 8px 8px 0;
  font-size:14.5px;
  color:var(--body);
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.toc-link:hover{background:var(--primary-t);color:var(--primary-d)}
.toc-link.is-current{
  border-left-color:var(--primary);
  background:var(--primary-t);
  color:var(--primary-d);
  font-weight:600;
}
.toc-tip{
  margin-top:14px;
  padding:14px 12px 0;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
  line-height:1.7;
}

/* 分节 */
.step-block{
  padding-bottom:44px;
  margin-bottom:44px;
  border-bottom:1px solid var(--line);
  scroll-margin-top:92px;
}
.step-block:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.step-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.step-num{
  flex:0 0 46px;
  width:46px;height:46px;
  border-radius:13px;
  background:var(--primary);
  color:#fff;
  display:grid;
  place-items:center;
  font-size:16px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
}
.step-head h2{font-size:clamp(20px,2.4vw,26px);font-weight:600;line-height:1.4}
.step-desc{font-size:16px;line-height:1.95;margin-bottom:26px;max-width:760px}
.check-card{
  height:100%;
  background:#fff;
  border:1px solid var(--line);
  border-left:4px solid var(--primary);
  border-radius:var(--r-md);
  padding:20px 22px;
  box-shadow:var(--sh-sm);
  transition:transform .18s ease,box-shadow .18s ease;
}
.check-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md)}
.check-idx{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:28px;height:28px;
  padding:0 8px;
  border-radius:var(--r-sm);
  background:var(--primary-t);
  color:var(--primary-d);
  font-size:13px;
  font-weight:700;
  margin-bottom:12px;
  font-variant-numeric:tabular-nums;
}
.check-card h3{font-size:17px;font-weight:600;line-height:1.55;margin-bottom:8px}
.check-card p{font-size:14.5px;line-height:1.8;color:var(--body)}
.check-grid>.cell{margin-bottom:24px}

/* 底部分隔提示条 */
.note-strip{
  margin-top:36px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:20px 24px;
  display:flex;
  align-items:flex-start;
  gap:14px;
  box-shadow:var(--sh-sm);
}
.note-strip .dot{
  flex:0 0 10px;
  width:10px;height:10px;
  margin-top:9px;
  border-radius:50%;
  background:var(--accent);
}
.note-strip p{font-size:14.5px;line-height:1.85;color:var(--body)}

/* 相关分类互链 */
.rel-section{
  background:#fff;
  border-top:1px solid var(--line);
  padding:72px 0;
}
.rel-head{margin-bottom:32px}
.rel-head h2{font-size:clamp(22px,2.8vw,30px);font-weight:600}
.rel-head p{margin-top:10px;font-size:15px;color:var(--muted)}
.rel-grid{display:flex;flex-wrap:wrap;margin:0 -12px}
.rel-grid>.cell{padding:0 12px;margin-bottom:24px}
.rel-card{
  display:block;
  height:100%;
  background:var(--bg);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:24px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease,background-color .18s ease;
}
.rel-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh-md);
  border-color:#CFE0EF;
  background:#fff;
}
.rel-card .tag{margin-bottom:14px}
.rel-card h3{font-size:18px;font-weight:600;color:var(--ink);margin-bottom:10px}
.rel-card p{font-size:14.5px;line-height:1.8;color:var(--body);margin-bottom:16px}
.rel-card .link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--primary);
}
.rel-card:hover .link-more .arw{transform:translateX(3px)}
.rel-card .arw{display:inline-block;transition:transform .18s ease}

/* 页脚 */
.site-footer{
  background:var(--ink);
  color:#C7D2DE;
  padding:64px 0 0;
}
.footer-grid{
  display:flex;
  flex-wrap:wrap;
  margin:0 -16px;
}
.footer-col{
  padding:0 16px;
  flex:0 0 25%;
  max-width:25%;
  margin-bottom:36px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-mark{background:rgba(255,255,255,.08);color:#7FC0EA}
.footer-brand strong{font-size:15.5px;color:#fff;font-weight:700}
.footer-col p{font-size:13.5px;line-height:1.9;color:#9FB0C1}
.footer-col h4{
  font-size:14px;
  color:#fff;
  font-weight:700;
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:13.5px;color:#C7D2DE}
.footer-col ul a:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  font-size:12.5px;
  color:#8C9DAE;
}

/* 通用区块标题 */
.section-title{
  font-size:clamp(22px,2.8vw,30px);
  font-weight:600;
  margin-bottom:10px;
}
.section-sub{font-size:15px;color:var(--muted);max-width:680px}

@media (max-width:1199px){
  .page-hero .hero-flex{gap:28px}
  .hero-media{flex:0 0 300px;max-width:300px}
}
@media (max-width:1023px){
  body{padding-bottom:80px}
  .nav-links,.nav-actions{display:none}
  .mobile-tab{display:flex}
  .page-hero{padding:28px 0 40px}
  .page-hero .hero-flex{flex-direction:column;align-items:stretch;gap:26px}
  .hero-media{flex:0 0 auto;max-width:100%;width:100%}
  .hero-media img{aspect-ratio:16/9}
  .media-badge{right:14px;bottom:-16px}
  .section-main{padding:52px 0 64px}
  .toc{
    position:static;
    display:flex;
    gap:8px;
    overflow-x:auto;
    padding:10px;
    margin-bottom:32px;
    -webkit-overflow-scrolling:touch;
  }
  .toc-title{display:none}
  .toc-link{
    flex:0 0 auto;
    white-space:nowrap;
    border-left:0;
    border-bottom:3px solid transparent;
    border-radius:8px;
    padding:8px 14px;
    font-size:13.5px;
  }
  .toc-link.is-current{border-bottom-color:var(--primary)}
  .toc-tip{display:none}
  .rel-section{padding:56px 0}
  .footer-col{flex:0 0 50%;max-width:50%}
}
@media (max-width:639px){
  .grid-container{padding-left:18px;padding-right:18px}
  .page-hero h1{font-size:clamp(24px,7vw,30px)}
  .page-hero .lead{font-size:15.5px}
  .step-num{width:40px;height:40px;flex:0 0 40px;border-radius:11px;font-size:15px}
  .step-head{gap:12px}
  .check-card{padding:18px}
  .footer-col{flex:0 0 100%;max-width:100%}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}