/* roulang page: index */
:root{
  --brand:#1F4E86;
  --brand-hover:#17406F;
  --brand-50:#EEF4FB;
  --brand-25:#F4F8FD;
  --teal:#0E9E92;
  --teal-50:#E6F6F4;
  --orange:#E8862B;
  --bg:#FAFBFD;
  --surface:#FFFFFF;
  --line:#E4E9F0;
  --line-strong:#D3DAE4;
  --ink:#10161F;
  --ink-2:#4A5566;
  --ink-3:#8A94A3;
  --success:#2E9E6B;
  --warn:#D98A0F;
  --error:#D2453A;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:20px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(16,22,31,.04),0 1px 1px rgba(16,22,31,.03);
  --sh2:0 6px 16px -6px rgba(31,78,134,.10),0 2px 6px rgba(16,22,31,.04);
  --sh3:0 18px 40px -18px rgba(31,78,134,.22),0 4px 12px rgba(16,22,31,.05);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:"Inter","DIN Alternate",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
button{font:inherit;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:600}
p{margin:0}
table{border-collapse:separate;border-spacing:0}
:focus-visible{outline:3px solid rgba(31,78,134,.25);outline-offset:2px;border-radius:8px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media(max-width:1023px){.container{padding:0 20px}}
@media(max-width:767px){.container{padding:0 16px}}
@media(min-width:1280px){.container{max-width:1280px}}

/* ---------- 通用组件 ---------- */
.eyebrow{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--brand);
  font-weight:600;
  margin-bottom:12px;
  text-transform:uppercase;
}
.section{padding:96px 0}
@media(max-width:1023px){.section{padding:72px 0}}
@media(max-width:767px){.section{padding:56px 0}}
.section-head{margin-bottom:40px}
.section-head h2{font-size:clamp(1.375rem,2.4vw,1.75rem);line-height:1.35}
.section-sub{color:var(--ink-2);font-size:15px;margin-top:10px;max-width:640px}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.section-head-row .section-head{margin-bottom:0}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:10px;
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  white-space:nowrap;
}
.btn-sm{height:36px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-lg{height:48px;padding:0 26px;font-size:16px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh1)}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--sh2)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.18)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand);background:var(--brand-50);transform:translateY(-1px);box-shadow:var(--sh1)}
.btn-ghost:active{transform:translateY(0)}
.link-more{color:var(--brand);font-size:14px;font-weight:500;text-underline-offset:3px}
.link-more:hover{text-decoration:underline}
.text-link{color:var(--brand);text-underline-offset:3px}
.text-link:hover{text-decoration:underline}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:13px;line-height:1;font-weight:500;
}
.badge-cat{background:var(--brand-50);color:var(--brand)}
.badge-lock{background:var(--teal-50);color:var(--teal)}
.badge-level{background:#fff;border:1px solid var(--line);color:var(--ink-2);height:26px;padding:0 12px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--ink-3);display:inline-block}
.dot-teal{background:var(--teal)}
.dot-brand{background:var(--brand)}
.dot-orange{background:var(--orange)}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:32px;height:72px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);flex-shrink:0}
.logo svg{color:var(--brand);flex-shrink:0}
.logo-text{font-size:16px;font-weight:700;letter-spacing:.01em}
.logo-short{display:none}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav-link{
  position:relative;display:inline-block;padding:6px 2px;
  color:var(--ink-2);font-size:15px;font-weight:500;letter-spacing:.02em;
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-2px;height:2px;width:0;
  background:var(--brand);border-radius:2px;transform:translateX(-50%);
  transition:width .18s var(--ease);
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{width:40%}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{width:60%}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:18px}
.link-login{color:var(--ink-2);font-size:15px;font-weight:500;transition:color .18s var(--ease)}
.link-login:hover{color:var(--brand)}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;
  background:none;border:0;padding:0;position:relative;
}
.nav-toggle span{
  display:block;width:22px;height:1.5px;background:var(--ink);
  margin:5px auto;border-radius:2px;
  transition:transform .25s var(--ease),opacity .2s var(--ease);
}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

.mobile-panel{
  display:none;position:fixed;left:0;right:0;top:60px;bottom:0;z-index:55;
  background:#fff;padding:8px 20px 120px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
}
.mobile-panel.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.m-link{
  display:flex;align-items:center;height:56px;
  border-bottom:1px solid var(--line);
  color:var(--ink-2);font-size:16px;font-weight:500;padding-left:0;
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.m-link.active{color:var(--brand);font-weight:600;border-left:3px solid var(--brand);padding-left:12px;margin-left:-12px}
.mobile-cta{width:100%;margin-top:24px}

@media(max-width:960px){
  .nav-links,.nav-actions{display:none}
  .nav-toggle{display:block}
  .mobile-panel{display:block}
  .nav-wrap{height:60px}
  .logo-text{font-size:15px}
}
@media(max-width:767px){
  .logo-full{display:none}
  .logo-short{display:inline}
}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:88px 0 96px;background:var(--bg)}
.hero::before{
  content:"";position:absolute;top:-18%;right:-10%;width:40vw;height:136%;
  background:linear-gradient(135deg,var(--brand) 0%,var(--teal) 100%);
  opacity:.06;transform:skewX(-12deg);border-radius:40px;pointer-events:none;
}
.hero-inner{position:relative;display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);gap:56px;align-items:center}
.hero h1{
  font-size:clamp(1.75rem,3.4vw,2.5rem);
  line-height:1.25;font-weight:700;letter-spacing:0;
  margin-bottom:18px;
}
.hero-sub{font-size:16px;line-height:1.8;color:var(--ink-2);max-width:520px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-trust{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:26px}
.hero-trust li{
  position:relative;font-size:12px;color:var(--ink-3);padding-left:14px;
}
.hero-trust li::before{
  content:"";position:absolute;left:0;top:50%;width:4px;height:4px;
  background:var(--line-strong);border-radius:50%;transform:translateY(-50%);
}
.hero-media{position:relative}
.hero-media > img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-xl);box-shadow:var(--sh2);
  background:var(--brand-50);
}
.hero-float{
  position:absolute;left:-20px;bottom:20px;width:260px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh3);padding:18px 20px;
}
.hero-float .badge-level{margin-bottom:12px}
.float-list li{
  position:relative;font-size:13px;color:var(--ink-2);line-height:1.6;
  padding-left:12px;margin-bottom:6px;
}
.float-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:1px;background:var(--brand);
}
.hero-float .link-more{display:inline-block;margin-top:10px;font-size:13px}
@media(max-width:1023px){
  .hero{padding:64px 0 72px}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-float{position:static;width:100%;margin-top:16px;box-shadow:var(--sh2)}
}
@media(max-width:767px){
  .hero{padding:48px 0 56px}
  .hero-cta .btn{flex:1 1 auto}
}

/* ---------- 信任数据带 ---------- */
.stats-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:32px 10px;text-align:center;border-left:1px solid var(--line)}
.stat:first-child{border-left:0}
.stat-num{
  display:block;font-family:var(--font-num);font-size:28px;font-weight:700;
  color:var(--brand);letter-spacing:-.01em;font-variant-numeric:tabular-nums;
}
.stat-label{font-size:13px;color:var(--ink-3)}
@media(max-width:767px){
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat{padding:22px 6px}
  .stat-num{font-size:22px}
  .stat:nth-child(odd){border-left:0}
  .stat:nth-child(-n+2){border-top:0}
  .stat:nth-child(n+3){border-top:1px solid var(--line)}
}

/* ---------- 权益对比表 ---------- */
.table-scroll{
  overflow-x:auto;-webkit-overflow-scrolling:touch;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh1);
}
.plan-table{width:100%;min-width:820px}
.plan-table th,.plan-table td{
  padding:16px 20px;text-align:left;font-size:15px;
  border-bottom:1px solid var(--line);vertical-align:middle;
}
.plan-table tbody tr:nth-child(even){background:var(--bg)}
.plan-table tbody tr:last-child td{border-bottom:0}
.plan-table tbody tr{height:56px}
.col-feature{width:26%;font-weight:600;color:var(--ink)}
.plan-th{padding:24px 20px !important;vertical-align:top !important;background:#fff;position:relative}
.plan-th.is-rec{background:var(--brand-25);box-shadow:inset 0 3px 0 var(--brand)}
.plan-th .plan-name{display:block;font-size:15px;font-weight:600;color:var(--ink-2)}
.plan-th .plan-price{
  display:block;font-family:var(--font-num);font-size:28px;font-weight:700;
  color:var(--ink);font-variant-numeric:tabular-nums;margin:6px 0 2px;line-height:1.2;
}
.plan-th .plan-price.is-orange{color:var(--orange)}
.plan-th .plan-price small{font-size:13px;font-weight:400;color:var(--ink-3);margin-left:2px}
.plan-th .plan-desc{display:block;font-size:13px;color:var(--ink-3);margin-bottom:14px;min-height:20px}
.rec-badge{
  position:absolute;top:0;right:0;background:var(--orange);color:#fff;
  font-size:12px;font-weight:600;line-height:1;padding:5px 10px;border-radius:0 0 0 10px;
}
.mark-yes{color:var(--brand);font-weight:700;font-size:16px}
.mark-no{color:var(--ink-3)}
.cell-text{font-size:14px;color:var(--ink-2)}
.table-note{margin-top:14px;font-size:13px;color:var(--ink-3)}

/* ---------- 等级亮点 ---------- */
.tier-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.tier-card{
  grid-column:span 3;display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh2);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.tier-card:hover{transform:translateY(-2px);box-shadow:var(--sh3)}
.tier-card:active{transform:translateY(0)}
.tier-card h3{font-size:17px;line-height:1.5;margin:14px 0 16px}
.tier-list{margin-bottom:20px;flex:1}
.tier-list li{
  position:relative;font-size:14px;color:var(--ink-2);line-height:1.6;
  padding-left:14px;margin-bottom:8px;
}
.tier-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:1px;background:var(--brand);
}
.tier-card .link-more{align-self:flex-start}
.tier-flagship{
  grid-column:span 6;position:relative;overflow:hidden;
  background:var(--brand-25);
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:24px;align-items:center;
}
.tier-flagship::before{
  content:"";position:absolute;top:-56px;left:-56px;width:200px;height:200px;
  border:26px solid var(--brand);border-radius:50%;opacity:.1;pointer-events:none;
}
.tier-flagship-body{position:relative;z-index:1}
.tier-flagship-body h3{font-size:20px;line-height:1.45}
.tier-flagship-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-md);
  background:var(--brand-50);
}
@media(max-width:1023px){
  .tier-flagship{grid-column:span 12}
  .tier-card{grid-column:span 6}
}
@media(max-width:767px){
  .tier-grid{gap:16px}
  .tier-card,.tier-flagship{grid-column:span 12}
  .tier-flagship{grid-template-columns:1fr}
}

/* ---------- 会员专享预览 ---------- */
.section-member{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.member-grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:48px;align-items:start}
.member-copy h2{font-size:clamp(1.375rem,2.4vw,1.75rem);line-height:1.35;margin-bottom:14px}
.member-copy p{color:var(--ink-2);font-size:15px}
.dot-list{margin:22px 0 28px}
.dot-list li{
  position:relative;font-size:14px;color:var(--ink-2);padding-left:16px;margin-bottom:10px;line-height:1.65;
}
.dot-list li::before{
  content:"";position:absolute;left:0;top:10px;width:6px;height:6px;
  border-radius:50%;background:var(--teal);
}
.member-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.member-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh2);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.member-card:hover{transform:translateY(-2px);box-shadow:var(--sh3)}
.member-card-media{position:relative}
.member-card-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--brand-50);
}
.member-card-media .badge-lock{
  position:absolute;left:12px;top:12px;background:rgba(230,246,244,.95);
}
.member-card-body{padding:16px 18px 20px}
.member-card-body h3{font-size:15px;line-height:1.55;margin-bottom:8px}
.member-card-body h3 a{color:var(--ink)}
.member-card-body h3 a:hover{color:var(--brand)}
.member-card-body p{font-size:13px;color:var(--ink-3);line-height:1.65}
.member-card-foot{margin-top:12px;display:flex;align-items:center;gap:10px}
@media(max-width:1023px){
  .member-grid{grid-template-columns:1fr;gap:36px}
}
@media(max-width:575px){
  .member-cards{grid-template-columns:1fr}
}

/* ---------- 最新信息（CMS） ---------- */
.news-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:36px;margin-top:32px}
.news-feature{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh2);display:flex;flex-direction:column;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.news-feature:hover{transform:translateY(-2px);box-shadow:var(--sh3)}
.news-feature-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--brand-50);
}
.news-feature-body{padding:20px 22px 24px}
.news-feature-body .badge-cat{margin-bottom:12px}
.news-feature-title{font-size:19px;line-height:1.5;margin-bottom:10px}
.news-feature-title a{color:var(--ink)}
.news-feature-title a:hover{color:var(--brand)}
.news-feature-sum{font-size:14px;color:var(--ink-2);line-height:1.7;margin-bottom:12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-time{font-size:13px;color:var(--ink-3)}
.news-list li{
  display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--line);
}
.news-list li:first-child{padding-top:0}
.news-thumb{flex-shrink:0}
.news-thumb img{
  width:96px;height:64px;object-fit:cover;border-radius:10px;background:var(--brand-50);
}
.news-item-body{min-width:0;flex:1}
.news-item-title{font-size:15px;line-height:1.55;margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-item-title a{color:var(--ink)}
.news-item-title a:hover{color:var(--brand)}
.news-item-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--ink-3)}
.news-item-meta a{color:var(--ink-3)}
.news-item-meta a:hover{color:var(--brand)}
.empty-state{
  margin-top:32px;padding:64px 24px;text-align:center;
  background:#fff;border:1px dashed var(--line-strong);border-radius:var(--r-lg);
}
.empty-icon{width:28px;height:28px;color:var(--ink-3);margin:0 auto 14px}
.empty-title{font-size:15px;font-weight:600;color:var(--ink-2);margin-bottom:6px}
.empty-sub{font-size:13px;color:var(--ink-3)}
.list-more{margin-top:28px;text-align:center}
.list-more a{
  display:inline-block;padding:10px 22px;border:1px solid var(--line-strong);
  border-radius:var(--r-pill);font-size:14px;color:var(--ink-2);background:#fff;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.list-more a:hover{border-color:var(--brand);color:var(--brand)}
@media(max-width:1023px){
  .news-grid{grid-template-columns:1fr;gap:24px}
}
@media(max-width:575px){
  .news-thumb img{width:80px;height:56px}
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-of-type{border-top:1px solid var(--line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;min-height:56px;font-size:16px;font-weight:600;color:var(--ink);
  cursor:pointer;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";flex-shrink:0;font-size:20px;font-weight:300;color:var(--ink-3);
  transition:transform .2s var(--ease),color .2s var(--ease);
}
.faq details[open] summary::after{content:"−";color:var(--brand)}
.faq summary:hover{color:var(--brand)}
.faq .faq-answer{
  max-width:720px;padding:0 0 22px;font-size:15px;line-height:1.8;color:var(--ink-2);
}

/* ---------- CTA ---------- */
.cta-section{padding:88px 0}
.cta-box{
  background:#F2F6FC;border-radius:var(--r-xl);
  padding:80px 64px;
  display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:56px;align-items:center;
}
.cta-copy h2{font-size:clamp(1.375rem,2.4vw,1.75rem);line-height:1.35;margin-bottom:14px}
.cta-copy p{color:var(--ink-2);font-size:15px;max-width:460px}
.cta-trust{display:flex;flex-wrap:wrap;gap:10px 24px;margin-top:24px}
.cta-trust li{
  position:relative;font-size:13px;color:var(--ink-3);padding-left:14px;
}
.cta-trust li::before{
  content:"";position:absolute;left:0;top:50%;width:8px;height:1px;
  background:var(--brand);transform:translateY(-50%);
}
.cta-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px 24px;box-shadow:var(--sh2);
}
.tier-switch{
  display:flex;gap:6px;padding:4px;background:var(--brand-50);border-radius:var(--r-pill);
}
.switch-btn{
  flex:1;border:0;background:transparent;color:var(--ink-2);
  height:34px;border-radius:var(--r-pill);font-size:14px;font-weight:500;
  transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.switch-btn.active{background:#fff;color:var(--brand);font-weight:600;box-shadow:var(--sh1)}
.cta-price{
  font-family:var(--font-num);font-size:34px;font-weight:700;color:var(--ink);
  font-variant-numeric:tabular-nums;margin:20px 0 2px;line-height:1.2;
}
.cta-price small{font-size:14px;font-weight:400;color:var(--ink-3);margin-left:6px;font-family:var(--font-sans)}
.cta-note{font-size:13px;color:var(--ink-3);margin:12px 0 16px}
.cta-card .btn{width:100%}
.pay-icons{display:flex;gap:10px;margin-top:18px}
.pay-chip{
  width:34px;height:24px;border:1px solid var(--line-strong);border-radius:6px;
  display:flex;align-items:center;justify-content:center;color:var(--ink-3);
}
.pay-chip svg{width:14px;height:14px}
@media(max-width:1023px){
  .cta-box{grid-template-columns:1fr;gap:36px;padding:56px 32px}
  .cta-section{padding:72px 0}
}
@media(max-width:767px){
  .cta-box{padding:40px 20px;border-radius:var(--r-lg)}
  .cta-section{padding:56px 0}
}

/* ---------- 页脚 ---------- */
.site-footer{background:#F7F9FC;border-top:1px solid var(--line);padding:64px 0 40px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--ink-2);line-height:1.7;max-width:320px}
.footer-icons{display:flex;gap:10px;margin-top:20px}
.footer-icons span{
  width:34px;height:34px;border:1px solid var(--line-strong);border-radius:10px;
  display:flex;align-items:center;justify-content:center;color:var(--ink-3);background:#fff;
}
.footer-icons svg{width:15px;height:15px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--ink-2);transition:color .18s var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-note{font-size:14px;color:var(--ink-2);line-height:1.7}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:18px}
.footer-bottom-links a{color:var(--ink-3)}
.footer-bottom-links a:hover{color:var(--brand)}
@media(max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:575px){
  .site-footer{padding:40px 0 32px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* ---------- 移动端底部条 ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;height:60px;z-index:50;
  display:none;align-items:center;justify-content:space-between;gap:16px;
  padding:0 16px;background:rgba(255,255,255,.97);
  border-top:1px solid var(--line);box-shadow:0 -6px 18px -12px rgba(31,78,134,.24);
}
.mobile-bar-price{font-family:var(--font-num);font-size:18px;font-weight:700;color:var(--ink)}
.mobile-bar-price small{font-size:12px;font-weight:400;color:var(--ink-3);margin-left:4px}
.mobile-bar .btn{height:40px;padding:0 20px}
@media(max-width:767px){
  .mobile-bar{display:flex}
  body{padding-bottom:60px}
}

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

/* roulang page: article */
:root{
  --brand:#1F4E86;
  --brand-dark:#17406F;
  --brand-soft:#EEF4FB;
  --brand-faint:#F4F8FD;
  --teal:#0E9E92;
  --teal-soft:#E6F6F4;
  --orange:#E8862B;
  --bg:#FAFBFD;
  --surface:#FFFFFF;
  --line:#E4E9F0;
  --line-strong:#D3DAE4;
  --ink:#10161F;
  --ink-2:#4A5566;
  --ink-3:#8A94A3;
  --ok:#2E9E6B;
  --warn:#D98A0F;
  --err:#D2453A;
  --r-sm:8px;
  --r-md:12px;
  --r-card:16px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,22,31,.04),0 1px 1px rgba(16,22,31,.03);
  --sh-2:0 6px 16px -6px rgba(31,78,134,.10),0 2px 6px rgba(16,22,31,.04);
  --sh-3:0 18px 40px -18px rgba(31,78,134,.22),0 4px 12px rgba(16,22,31,.05);
  --gap:24px;
  --sec:96px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:"Inter","DIN Alternate",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(31,78,134,.25);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.88);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--brand);flex:0 0 auto}
.logo svg{color:var(--brand)}
.logo-text{font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--ink)}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;letter-spacing:.02em;color:var(--ink-2);
  padding:6px 0;transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-4px;height:2px;width:0;
  background:var(--brand);border-radius:2px;transform:translateX(-50%);
  transition:width .18s var(--ease);
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{width:40%}
.nav-link.active{color:var(--ink);font-weight:600}
.nav-link.active::after{width:60%}
.nav-actions{display:flex;align-items:center;gap:18px;flex:0 0 auto}
.nav-login{font-size:14px;color:var(--ink-2);transition:color .18s var(--ease)}
.nav-login:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:10px;
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.18)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line-strong)}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand)}
.btn-pill{height:36px;padding:0 18px;border-radius:var(--r-pill);font-size:14px}
.btn-sm{height:36px;padding:0 16px;font-size:14px}
.btn-lg{height:48px;padding:0 26px;font-size:16px}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-size:15px;font-weight:600;
  border-bottom:1px solid var(--line-strong);padding:4px 0;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.btn-text:hover{border-color:var(--brand);color:var(--brand-dark)}
.menu-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.menu-toggle span{display:block;width:20px;height:1.5px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.mobile-panel{
  display:none;position:fixed;inset:60px 0 0 0;z-index:55;
  background:#fff;padding:8px 20px 0;
  flex-direction:column;overflow-y:auto;
}
.mobile-panel.is-open{display:flex}
.mobile-panel .nav-link{
  height:56px;display:flex;align-items:center;font-size:16px;
  border-bottom:1px solid var(--line);padding-left:12px;position:relative;
}
.mobile-panel .nav-link::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;background:transparent}
.mobile-panel .nav-link.active{color:var(--brand)}
.mobile-panel .nav-link.active::before{background:var(--brand)}
.mobile-panel .nav-link::after{display:none}
.mobile-panel-foot{margin-top:auto;padding:20px 0 28px;display:grid;gap:12px}

/* ---------- Article hero ---------- */
.article-hero{
  position:relative;
  padding:64px 0 56px;
  color:#fff;
  background-color:#122A47;
  background-image:
    linear-gradient(180deg,rgba(13,32,56,.86) 0%,rgba(13,32,56,.78) 55%,rgba(13,32,56,.90) 100%),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
}
.article-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:rgba(255,255,255,.10)
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.62);margin-bottom:20px}
.breadcrumb a{color:rgba(255,255,255,.78);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:rgba(255,255,255,.55);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:#8FC6C0;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;opacity:.7}
.article-title{
  font-size:clamp(1.75rem,3.4vw,2.5rem);
  line-height:1.25;font-weight:700;letter-spacing:0;
  max-width:22ch;color:#fff;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  margin-top:22px;font-size:13px;color:rgba(255,255,255,.70);
}
.article-meta .meta-dot{width:3px;height:3px;border-radius:50%;background:rgba(255,255,255,.45)}
.chip-cat{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.14);color:#fff;font-size:13px;font-weight:500;
  border:1px solid rgba(255,255,255,.18);
}

/* ---------- Article layout ---------- */
.article-section{padding:64px 0 var(--sec)}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}
.article-body{
  max-width:760px;
  font-size:17px;line-height:1.9;color:var(--ink);
}
.article-body > * + *{margin-top:1.25em}
.article-body p{color:#1B222C}
.article-body h2{
  position:relative;font-size:24px;line-height:1.45;font-weight:600;
  margin:48px 0 16px;padding-left:14px;color:var(--ink);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.32em;bottom:.32em;width:3px;border-radius:3px;background:var(--brand);
}
.article-body h3{font-size:20px;line-height:1.5;font-weight:600;margin:36px 0 12px;color:var(--ink)}
.article-body h4{font-size:17px;line-height:1.6;font-weight:600;margin:28px 0 10px;color:var(--ink-2)}
.article-body ul,.article-body ol{padding-left:0;display:grid;gap:10px}
.article-body li{position:relative;padding-left:20px;color:#1B222C}
.article-body li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:1px;background:var(--brand)}
.article-body ol{counter-reset:li}
.article-body ol li{counter-increment:li}
.article-body ol li::before{
  content:counter(li);width:auto;height:auto;background:none;color:var(--brand);
  font-family:var(--font-num);font-size:14px;top:0;left:0;font-weight:600;
}
.article-body ol li{padding-left:24px}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--line-strong)}
.article-body a:hover{text-decoration-color:var(--brand)}
.article-body blockquote{
  margin:28px 0;padding:20px 22px;border-left:3px solid var(--brand);
  background:var(--brand-faint);border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--ink-2);font-size:16px;line-height:1.8;
}
.article-body img{border-radius:var(--r-md);margin:28px auto;box-shadow:var(--sh-1)}
.article-body figure{margin:28px 0}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:12px}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:28px 0;background:#fff;border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1)}
.article-body th,.article-body td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
.article-body th{background:var(--brand-faint);font-weight:600;color:var(--ink-2);font-size:14px}
.article-body tr:last-child td{border-bottom:0}
.article-body code{font-family:var(--font-num);font-size:14px;background:var(--brand-soft);padding:2px 6px;border-radius:6px;color:var(--brand-dark)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}

/* ---------- Side rail ---------- */
.article-rail{position:sticky;top:100px;display:grid;gap:20px}
.rail-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-2);
}
.rail-card h3{font-size:16px;font-weight:600;margin-bottom:12px}
.rail-card p{font-size:14px;color:var(--ink-2);line-height:1.8}
.rail-list{display:grid;gap:0;margin-top:6px}
.rail-list li{border-top:1px solid var(--line);padding:12px 0;font-size:14px;color:var(--ink-2);display:flex;gap:10px}
.rail-list li:first-child{border-top:0}
.rail-list .dot{width:6px;height:6px;border-radius:50%;background:var(--teal);margin-top:9px;flex:0 0 auto}
.rail-card.is-teal{background:var(--teal-soft);border-color:#C9E9E5}
.rail-card.is-teal h3{color:#0A726A}

/* ---------- Member notice bar ---------- */
.member-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  margin:40px 0 0;padding:22px 24px;border-radius:var(--r-md);
  background:var(--brand-soft);border:1px solid #D8E6F5;
}
.member-bar p{font-size:15px;color:var(--brand-dark);line-height:1.7;flex:1 1 320px}

/* ---------- Tags ---------- */
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:36px;padding-top:28px;border-top:1px solid var(--line)}
.tag-row .label{font-size:13px;color:var(--ink-3);margin-right:4px}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--line-strong);color:var(--ink-2);font-size:13px;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.tag:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.tag.is-locked{background:var(--teal-soft);border-color:#C9E9E5;color:#0A726A;gap:6px}
.tag.is-locked svg{width:12px;height:12px}

/* ---------- Back / top ---------- */
.article-foot-nav{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:32px}

/* ---------- CTA strip ---------- */
.cta-section{padding:0 0 var(--sec)}
.cta-strip{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  background-color:#F2F6FC;
  background-image:linear-gradient(0deg,rgba(242,246,252,.96),rgba(242,246,252,.96)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  padding:56px;
  display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:48px;align-items:center;
  border:1px solid var(--line);
}
.cta-strip h2{font-size:clamp(1.375rem,2.4vw,1.75rem);line-height:1.35;font-weight:600;max-width:16ch}
.cta-strip .lead{margin-top:14px;color:var(--ink-2);font-size:15px;max-width:44ch}
.trust-row{display:flex;flex-wrap:wrap;gap:20px;margin-top:24px}
.trust-row span{font-size:13px;color:var(--ink-3);display:inline-flex;align-items:center;gap:8px}
.trust-row span::before{content:"";width:14px;height:1px;background:var(--line-strong)}
.join-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-2);padding:24px}
.seg{display:inline-flex;padding:4px;background:var(--brand-soft);border-radius:var(--r-pill);gap:4px}
.seg button{height:30px;padding:0 14px;border-radius:var(--r-pill);font-size:13px;font-weight:600;color:var(--ink-2);transition:background .2s var(--ease),color .2s var(--ease)}
.seg button.is-on{background:#fff;color:var(--brand);box-shadow:var(--sh-1)}
.price-line{display:flex;align-items:baseline;gap:8px;margin:20px 0 6px}
.price-line .amount{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:34px;font-weight:700;color:var(--orange)}
.price-line .unit{font-size:13px;color:var(--ink-3)}
.join-card .btn{width:100%;margin-top:16px}
.join-card .tiny{margin-top:12px;font-size:12px;color:var(--ink-3);line-height:1.7}
.pay-row{display:flex;gap:10px;margin-top:16px}
.pay-row span{
  width:34px;height:22px;border-radius:5px;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-3);
}
.pay-row svg{width:14px;height:14px}

/* ---------- Empty / error ---------- */
.empty-state{
  max-width:560px;margin:0 auto;text-align:center;padding:64px 24px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-2);
}
.empty-state svg{width:40px;height:40px;color:var(--brand);margin:0 auto 18px}
.empty-title{font-size:19px;font-weight:600;margin-bottom:8px}
.empty-desc{font-size:14px;color:var(--ink-3);margin-bottom:24px}

/* ---------- Footer ---------- */
.site-footer{background:#F7F9FC;border-top:1px solid var(--line);padding:64px 0 40px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--ink-2);line-height:1.8;max-width:34ch}
.footer-icons{display:flex;gap:10px;margin-top:18px}
.footer-icons span{
  width:34px;height:34px;border-radius:10px;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--brand);background:#fff;
}
.footer-icons svg{width:16px;height:16px}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--ink)}
.footer-col ul{display:grid;gap:10px}
.footer-col ul a{font-size:14px;color:var(--ink-2);transition:color .18s var(--ease)}
.footer-col ul a:hover{color:var(--brand)}
.footer-note{font-size:13px;color:var(--ink-3);line-height:1.9}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:20px}
.footer-bottom-links a{color:var(--ink-3);transition:color .18s var(--ease)}
.footer-bottom-links a:hover{color:var(--brand)}

/* ---------- Sticky mobile CTA ---------- */
.sticky-cta{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:50;height:60px;
  background:rgba(255,255,255,.96);border-top:1px solid var(--line);
  align-items:center;justify-content:space-between;padding:0 16px;gap:12px;
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.sticky-cta .price{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:20px;font-weight:700;color:var(--orange)}
.sticky-cta .price small{font-size:12px;color:var(--ink-3);font-weight:400;margin-left:2px}

/* ---------- Breakpoints ---------- */
@media (max-width:1279px){
  .container{max-width:1100px}
  .article-grid{grid-template-columns:minmax(0,1fr) 280px;gap:40px}
}
@media (max-width:1023px){
  :root{--sec:72px}
  .nav-links{display:none}
  .nav-actions .nav-login{display:none}
  .menu-toggle{display:flex}
  .article-grid{grid-template-columns:minmax(0,1fr)}
  .article-rail{position:static;grid-template-columns:repeat(2,minmax(0,1fr));display:grid}
  .cta-strip{grid-template-columns:minmax(0,1fr);padding:44px 32px;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  :root{--sec:56px}
  .container{padding:0 16px}
  .header-inner{height:60px}
  .logo-text{font-size:15px}
  .article-hero{padding:40px 0 36px}
  .article-title{max-width:none}
  .article-section{padding:40px 0 var(--sec)}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:21px;margin-top:36px}
  .article-rail{grid-template-columns:minmax(0,1fr)}
  .cta-strip{padding:32px 20px;border-radius:var(--r-card)}
  .member-bar{padding:18px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .site-footer{padding:40px 0 96px}
  .sticky-cta{display:flex}
}
@media (max-width:575px){
  .article-meta{gap:10px;font-size:12px}
  .cta-strip h2{max-width:none}
  .trust-row{gap:14px}
  .btn{width:100%}
  .btn.btn-inline{width:auto}
  .join-card .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .btn:hover{transform:none}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --brand:#1F4E86;
  --brand-hover:#17406F;
  --brand-soft:#EEF4FB;
  --brand-tint:#F4F8FD;
  --cyan:#0E9E92;
  --cyan-soft:#E6F6F4;
  --orange:#E8862B;
  --bg:#FAFBFD;
  --surface:#FFFFFF;
  --line:#E4E9F0;
  --line-strong:#D3DAE4;
  --ink:#10161F;
  --ink-2:#4A5566;
  --ink-3:#8A94A3;
  --dark:#10161F;
  --dark-2:#18202B;
  --ok:#2E9E6B;
  --warn:#D98A0F;
  --err:#D2453A;
  --r-s:8px;
  --r-m:12px;
  --r-c:16px;
  --r-l:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,22,31,.04),0 1px 1px rgba(16,22,31,.03);
  --sh-2:0 6px 16px -6px rgba(31,78,134,.10),0 2px 6px rgba(16,22,31,.04);
  --sh-3:0 18px 40px -18px rgba(31,78,134,.22),0 4px 12px rgba(16,22,31,.05);
  --maxw:1200px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:"Inter","DIN Alternate",system-ui,-apple-system,sans-serif;
}
/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea{font:inherit}
:focus-visible{outline:3px solid rgba(31,78,134,.25);outline-offset:2px;border-radius:6px}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ============ 容器 ============ */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.rule{height:1px;background:var(--line);border:0;margin:0}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.14em;
  color:var(--brand);text-transform:uppercase;margin-bottom:14px;
}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.88);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:28px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--brand);font-weight:600;font-size:18px;letter-spacing:.01em;white-space:nowrap}
.logo svg{flex:none}
.logo-text{line-height:1}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:12px}
.nav-link{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;font-weight:500;letter-spacing:.02em;color:var(--ink-2);
  transition:color .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;height:2px;width:0;
  background:var(--brand);transform:translateX(-50%);
  transition:width .18s cubic-bezier(.2,.7,.3,1);
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{width:40%}
.nav-link.active{color:var(--brand)}
.nav-link.active::after{width:60%}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:18px}
.link-plain{font-size:15px;font-weight:500;color:var(--ink-2);transition:color .18s ease}
.link-plain:hover{color:var(--brand)}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border-radius:var(--r-s);
}
.nav-toggle span{display:block;width:20px;height:1.5px;background:var(--ink);margin:4px auto;border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

.mobile-panel{
  display:none;position:fixed;inset:60px 0 0 0;z-index:70;
  background:var(--surface);border-top:1px solid var(--line);
  padding:8px 16px 96px;overflow-y:auto;
}
.mobile-panel.is-open{display:block}
.mobile-panel a{
  display:flex;align-items:center;height:56px;
  border-bottom:1px solid var(--line);
  font-size:16px;font-weight:500;color:var(--ink-2);
}
.mobile-panel a.is-current{color:var(--brand);border-left:3px solid var(--brand);padding-left:12px}
.mobile-panel .panel-cta{
  position:fixed;left:16px;right:16px;bottom:16px;
  display:flex;align-items:center;justify-content:center;height:48px;
  background:var(--brand);color:#fff;border-radius:10px;font-weight:600;
}
.mobile-panel .panel-cta:hover{background:var(--brand-hover)}

/* ============ 按钮 / 徽章 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:10px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .2s cubic-bezier(.2,.7,.3,1),box-shadow .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
}
.btn-sm{height:36px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-lg{height:48px;padding:0 26px;font-size:16px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.18)}
.btn-ghost{background:#fff;color:var(--brand);border:1px solid var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand);background:var(--brand-soft)}
.btn-ghost:active{transform:translateY(0)}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-size:15px;font-weight:600;
  text-underline-offset:3px;
}
.link-arrow::after{content:"→";transition:transform .18s ease}
.link-arrow:hover{text-decoration:underline}
.link-arrow:hover::after{transform:translateX(3px)}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;
  border-radius:var(--r-pill);font-size:13px;font-weight:500;white-space:nowrap;
}
.badge-cat{background:var(--brand-soft);color:var(--brand)}
.badge-member{background:var(--cyan-soft);color:var(--cyan)}
.badge-level{background:#F1F3F7;color:var(--ink-2)}
.dot{width:6px;height:6px;border-radius:50%;background:currentColor;flex:none}

/* ============ 紧凑首屏 ============ */
.hero-cat{
  background:var(--surface);
  border-bottom:1px solid var(--line);
  padding:64px 0 48px;
  position:relative;overflow:hidden;
}
.hero-cat::after{
  content:"";position:absolute;right:-10%;top:-40%;
  width:38vw;height:180%;transform:rotate(45deg);
  background:linear-gradient(180deg,rgba(31,78,134,.06),rgba(14,158,146,.04));
  pointer-events:none;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-3);margin-bottom:22px;
}
.breadcrumb a{color:var(--ink-2);transition:color .18s ease}
.breadcrumb a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .current{color:var(--ink-3)}
.hero-cat h1{
  position:relative;padding-left:18px;
  font-size:clamp(1.75rem,3.4vw,2.25rem);line-height:1.25;font-weight:700;
  color:var(--ink);max-width:820px;
}
.hero-cat h1::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;
  border-radius:2px;background:var(--brand);
}
.hero-lead{
  margin-top:18px;max-width:680px;font-size:17px;line-height:1.8;color:var(--ink-2);
}
.hero-actions{margin-top:28px;display:flex;flex-wrap:wrap;align-items:center;gap:16px}

/* ============ 指标带 ============ */
.metrics{background:var(--brand-tint);border-bottom:1px solid var(--line)}
.metrics-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  padding:32px 0;
}
.metric{
  padding:6px 24px;border-left:1px solid var(--line);
}
.metric:first-child{border-left:0;padding-left:0}
.metric-num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:28px;line-height:1.2;font-weight:700;color:var(--brand);
}
.metric-num small{font-size:14px;font-weight:600;margin-left:4px;color:var(--ink-2)}
.metric-label{font-size:13px;color:var(--ink-3);margin-top:6px}

/* ============ 深色时间线 ============ */
.dark-band{background:var(--dark);color:#fff;padding:80px 0}
.dark-band .eyebrow{color:#6FD3C9}
.dark-band h2{font-size:clamp(1.375rem,2.4vw,1.75rem);line-height:1.35;font-weight:600}
.dark-band .lead-dark{margin-top:14px;max-width:700px;color:rgba(255,255,255,.66);font-size:16px}
.timeline{
  position:relative;margin-top:56px;
  display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:24px;
}
.timeline::before{
  content:"";position:absolute;left:0;right:0;top:5px;height:1px;
  background:rgba(255,255,255,.16);
}
.tl-item{position:relative;padding-top:28px}
.tl-dot{
  position:absolute;left:0;top:0;width:11px;height:11px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 0 5px rgba(14,158,146,.16);
}
.tl-time{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:13px;letter-spacing:.06em;color:#6FD3C9;
}
.tl-title{margin-top:8px;font-size:16px;font-weight:600;color:#fff}
.tl-desc{margin-top:8px;font-size:14px;line-height:1.7;color:rgba(255,255,255,.6)}

/* ============ 侧栏目录 + 图文交错 ============ */
.layout{
  display:grid;grid-template-columns:170px minmax(0,1fr);gap:56px;
  align-items:start;
}
.toc{position:sticky;top:104px}
.toc-title{
  font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--ink-3);
  padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:14px;
}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-link{
  position:relative;display:block;padding:9px 0 9px 14px;
  font-size:14px;color:var(--ink-2);border-left:2px solid transparent;
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
}
.toc-link::before{
  content:"";position:absolute;left:0;top:50%;width:2px;height:0;
  background:var(--brand);transform:translateY(-50%);
  transition:height .2s cubic-bezier(.2,.7,.3,1);
}
.toc-link:hover{color:var(--brand)}
.toc-link.is-active{color:var(--brand);font-weight:600}
.toc-link.is-active::before{height:70%}
.toc-tip{
  margin-top:20px;padding:14px;border:1px solid var(--line);border-radius:var(--r-m);
  background:var(--brand-tint);font-size:12px;line-height:1.7;color:var(--ink-3);
}

.content-col{max-width:820px}
.block{padding:48px 0;border-bottom:1px solid var(--line)}
.block:first-child{padding-top:0}
.block:last-child{border-bottom:0;padding-bottom:0}
.block__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:center}
.block__media{order:1;border-radius:var(--r-c);overflow:hidden;box-shadow:var(--sh-2);background:var(--brand-soft)}
.block__media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.block__body{order:2}
.block.is-flipped .block__media{order:2}
.block.is-flipped .block__body{order:1}
.block__index{
  font-family:var(--font-num);font-size:13px;letter-spacing:.14em;
  color:var(--brand);font-weight:600;
}
.block__title{margin-top:8px;font-size:20px;font-weight:600;line-height:1.5;color:var(--ink)}
.block__text{margin-top:12px;font-size:16px;line-height:1.8;color:var(--ink-2)}
.points{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.points li{
  position:relative;padding-left:16px;font-size:15px;color:var(--ink-2);line-height:1.7;
}
.points li::before{
  content:"";position:absolute;left:0;top:11px;width:10px;height:1px;background:var(--brand);
}

/* ============ 内链列表 ============ */
.links-panel{
  margin-top:48px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-c);box-shadow:var(--sh-1);overflow:hidden;
}
.links-head{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;border-bottom:1px solid var(--line);
}
.links-head h3{font-size:17px;font-weight:600}
.links-head span{font-size:13px;color:var(--ink-3)}
.links-list li + li{border-top:1px solid var(--line)}
.links-list a{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:18px 24px;transition:background-color .18s ease;
}
.links-list a:hover{background:var(--brand-tint)}
.links-list .ll-main{font-size:15px;font-weight:600;color:var(--ink)}
.links-list .ll-sub{font-size:13px;color:var(--ink-3);margin-top:2px}
.links-list .ll-go{color:var(--brand);font-size:13px;font-weight:600;white-space:nowrap}

/* ============ FAQ ============ */
.faq-list{max-width:860px;margin:48px auto 0;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  min-height:60px;padding:16px 4px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--ink);
  transition:color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-icon{
  position:relative;flex:none;width:16px;height:16px;border:1px solid var(--line-strong);
  border-radius:50%;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:8px;height:1px}
.faq-icon::after{width:1px;height:8px;transition:opacity .2s ease}
.faq-item[open] .faq-icon::after{opacity:0}
.faq-answer{
  max-width:720px;padding:0 4px 22px;font-size:15px;line-height:1.8;color:var(--ink-2);
}

/* ============ CTA ============ */
.cta-band{
  background:var(--brand-tint);border-radius:var(--r-l);
  padding:56px 48px;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  opacity:.10;pointer-events:none;
}
.cta-inner{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:40px;align-items:center}
.cta-inner h2{font-size:clamp(1.375rem,2.4vw,1.75rem);line-height:1.35;font-weight:600}
.cta-inner p{margin-top:12px;font-size:16px;color:var(--ink-2);max-width:460px}
.cta-points{margin-top:20px;display:flex;flex-wrap:wrap;gap:20px}
.cta-points span{position:relative;padding-left:14px;font-size:13px;color:var(--ink-3)}
.cta-points span::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:1px;background:var(--cyan);
}
.cta-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-c);
  box-shadow:var(--sh-2);padding:28px;
}
.cta-card h3{font-size:17px;font-weight:600}
.cta-price{
  margin-top:14px;font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:32px;font-weight:700;color:var(--ink);line-height:1.1;
}
.cta-price small{font-size:14px;font-weight:500;color:var(--ink-3);margin-left:6px}
.cta-card .btn{width:100%;margin-top:20px}
.cta-note{margin-top:12px;font-size:13px;color:var(--ink-3);line-height:1.6}

/* ============ 页脚 ============ */
.site-footer{background:#F7F9FC;border-top:1px solid var(--line);padding:64px 0 40px;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .logo{font-size:17px}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.75;color:var(--ink-2);max-width:320px}
.footer-icons{display:flex;gap:12px;margin-top:18px}
.footer-icons span{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-s);color:var(--ink-3);background:#fff;
  transition:color .18s ease,border-color .18s ease;
}
.footer-icons span:hover{color:var(--brand);border-color:var(--brand)}
.footer-icons svg{width:16px;height:16px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--ink-2);transition:color .18s ease}
.footer-col a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.footer-note{font-size:13px;line-height:1.7;color:var(--ink-3)}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:var(--ink-3);
}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:18px}
.footer-bottom-links a{color:var(--ink-3);transition:color .18s ease}
.footer-bottom-links a:hover{color:var(--brand)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:1080px}
  .layout{grid-template-columns:160px minmax(0,1fr);gap:40px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .hero-cat{padding:48px 0 40px}
  .layout{grid-template-columns:minmax(0,1fr);gap:0}
  .toc{
    position:static;margin-bottom:32px;padding-bottom:16px;border-bottom:1px solid var(--line);
  }
  .toc-title{margin-bottom:12px}
  .toc-list{flex-direction:row;gap:10px;overflow-x:auto;padding-bottom:6px;scrollbar-width:thin}
  .toc-list li{flex:none}
  .toc-link{
    border:1px solid var(--line-strong);border-radius:var(--r-pill);
    padding:8px 16px;background:#fff;white-space:nowrap;
  }
  .toc-link::before{display:none}
  .toc-link.is-active{background:var(--brand);border-color:var(--brand);color:#fff}
  .toc-tip{display:none}
  .metrics-grid{grid-template-columns:repeat(2,1fr);gap:24px 0}
  .metric{padding:6px 20px}
  .metric:nth-child(odd){border-left:0;padding-left:0}
  .cta-inner{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section--tight{padding:48px 0}
  .header-inner{height:60px;gap:16px}
  .nav-links,.header-actions .link-plain,.header-actions .btn{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .hero-cat{padding:40px 0 32px}
  .hero-cat::after{display:none}
  .hero-cat h1{padding-left:14px;font-size:28px}
  .hero-lead{font-size:16px}
  .hero-actions .btn{width:100%}
  .dark-band{padding:56px 0}
  .timeline{grid-template-columns:minmax(0,1fr);gap:0;margin-top:36px}
  .timeline::before{left:5px;top:6px;bottom:6px;width:1px;height:auto;right:auto}
  .tl-item{padding:0 0 28px 28px}
  .tl-item:last-child{padding-bottom:0}
  .tl-dot{top:6px}
  .block{padding:36px 0}
  .block__grid{grid-template-columns:minmax(0,1fr);gap:20px}
  .block__media,.block.is-flipped .block__media{order:1}
  .block__body,.block.is-flipped .block__body{order:2}
  .links-list a{flex-direction:column;align-items:flex-start;gap:6px;padding:16px 18px}
  .cta-band{padding:36px 20px}
  .site-footer{padding:48px 0 32px;margin-top:56px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  body{padding-bottom:60px}
  .sticky-cta{
    position:fixed;left:0;right:0;bottom:0;z-index:60;
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    height:60px;padding:0 16px;background:rgba(255,255,255,.96);
    border-top:1px solid var(--line);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  }
  .sticky-cta .sc-price{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:18px;font-weight:700;color:var(--ink)}
  .sticky-cta .sc-price small{font-size:12px;font-weight:500;color:var(--ink-3);margin-left:6px}
}
@media (min-width:768px){.sticky-cta{display:none}}
@media (max-width:575px){
  .metrics-grid{grid-template-columns:1fr;gap:0}
  .metric{border-left:0;padding:14px 0;border-bottom:1px solid var(--line)}
  .metric:last-child{border-bottom:0}
  .toc-list{gap:8px}
  .block__title{font-size:18px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
}

/* roulang page: category2 */
:root{
  --c-primary:#1F4E86;
  --c-primary-dark:#17406F;
  --c-primary-50:#EEF4FB;
  --c-primary-25:#F4F8FD;
  --c-teal:#0E9E92;
  --c-teal-50:#E6F6F4;
  --c-orange:#E8862B;
  --c-bg:#FAFBFD;
  --c-card:#FFFFFF;
  --c-line:#E4E9F0;
  --c-line-strong:#D3DAE4;
  --c-text:#10161F;
  --c-text-2:#4A5566;
  --c-text-3:#8A94A3;
  --c-success:#2E9E6B;
  --c-warn:#D98A0F;
  --c-error:#D2453A;
  --c-dark:#131A24;
  --c-footer:#F7F9FC;
  --r-s:8px;
  --r-m:12px;
  --r-card:16px;
  --r-l:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,22,31,.04),0 1px 1px rgba(16,22,31,.03);
  --sh-2:0 6px 16px -6px rgba(31,78,134,.10),0 2px 6px rgba(16,22,31,.04);
  --sh-3:0 18px 40px -18px rgba(31,78,134,.22),0 4px 12px rgba(16,22,31,.05);
  --sp-section:96px;
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1{font-size:clamp(1.75rem,3.4vw,2.25rem);line-height:1.25;font-weight:700}
h2{font-size:clamp(1.375rem,2.4vw,1.75rem);line-height:1.35;font-weight:600}
h3{font-size:20px;line-height:1.5;font-weight:600}
h4{font-size:17px;line-height:1.6;font-weight:600}
p{color:var(--c-text-2)}
:focus-visible{outline:3px solid rgba(31,78,134,.25);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-family:"Inter","DIN Alternate",system-ui,sans-serif;font-variant-numeric:tabular-nums}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.88);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
}
.header-inner{display:flex;align-items:center;gap:24px;height:var(--nav-h)}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:16px;letter-spacing:.01em;color:var(--c-text);white-space:nowrap}
.logo svg{color:var(--c-primary);flex:none}
.nav-links{display:flex;align-items:center;gap:30px;margin-left:auto}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  letter-spacing:.02em;
  color:var(--c-text-2);
  padding:6px 0;
  transition:color .18s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:0;
  height:2px;
  width:0;
  background:var(--c-primary);
  transform:translateX(-50%);
  border-radius:2px;
  transition:width .18s ease;
}
.nav-link:hover{color:var(--c-primary)}
.nav-link:hover::after{width:40%}
.nav-link.active{color:var(--c-primary)}
.nav-link.active::after{width:60%}
.header-actions{display:flex;align-items:center;gap:18px;margin-left:8px}
.link-login{font-size:15px;font-weight:500;color:var(--c-text-2);transition:color .18s ease}
.link-login:hover{color:var(--c-primary)}
.nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border-radius:10px;color:var(--c-text)}
.nav-toggle span{display:block;width:20px;height:1.5px;background:currentColor;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:20px;height:1.5px;background:currentColor}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-panel{
  position:fixed;
  left:0;
  right:0;
  top:60px;
  bottom:0;
  background:#fff;
  padding:8px 16px 24px;
  overflow-y:auto;
  opacity:0;
  visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease;
  z-index:59;
}
.nav-open .mobile-panel{opacity:1;visibility:visible}
.mobile-panel .m-link{
  display:flex;
  align-items:center;
  height:56px;
  border-bottom:1px solid var(--c-line);
  font-size:16px;
  font-weight:500;
  color:var(--c-text-2);
}
.mobile-panel .m-link.active{color:var(--c-primary);box-shadow:inset 3px 0 0 var(--c-primary);padding-left:12px}
.panel-foot{position:sticky;bottom:0;padding-top:24px;background:#fff}
.panel-foot .btn{width:100%}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 20px;
  border-radius:10px;
  font-size:15px;
  font-weight:500;
  letter-spacing:.01em;
  border:1px solid transparent;
  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(--c-primary);color:#fff;box-shadow:var(--sh-2)}
.btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.18)}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-line-strong)}
.btn-ghost:hover{border-color:var(--c-primary);background:var(--c-primary-50)}
.btn-sm{height:36px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-lg{height:48px;padding:0 26px;font-size:16px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--c-primary);text-decoration:underline;text-decoration-color:transparent;text-underline-offset:3px;transition:text-decoration-color .18s ease,color .18s ease}
.link-arrow:hover{text-decoration-color:currentColor;color:var(--c-primary-dark)}

/* ---------- 紧凑首屏 ---------- */
.hero-compact{background:#fff;border-bottom:1px solid var(--c-line);padding:64px 0 48px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);margin-bottom:22px}
.breadcrumb a{color:var(--c-text-3);transition:color .18s ease}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:var(--c-line-strong)}
.breadcrumb .current{color:var(--c-text-2)}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--c-primary);text-transform:uppercase;margin-bottom:14px}
.hero-compact h1{position:relative;padding-left:18px;max-width:820px}
.hero-compact h1::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--c-primary)}
.hero-lead{margin-top:18px;max-width:720px;font-size:16px;line-height:1.8;color:var(--c-text-2)}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:28px}

/* ---------- 指标带 ---------- */
.metrics{background:#fff;border-bottom:1px solid var(--c-line)}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.metric{padding:26px 24px;border-right:1px solid var(--c-line)}
.metric:last-child{border-right:0}
.metric-value{font-size:28px;font-weight:600;line-height:1.2;color:var(--c-text);font-family:"Inter","DIN Alternate",system-ui,sans-serif;font-variant-numeric:tabular-nums}
.metric-value em{font-style:normal;font-size:15px;color:var(--c-text-3);margin-left:4px;font-weight:500}
.metric-label{margin-top:6px;font-size:13px;color:var(--c-text-3)}

/* ---------- 板块通用 ---------- */
.section{padding:var(--sp-section) 0}
.section-tight{padding:64px 0}
.section-head{max-width:720px;margin-bottom:36px}
.section-head h2{margin-bottom:12px}
.section-head p{font-size:15px;line-height:1.8}
.rule{height:1px;background:var(--c-line);border:0;margin:0}

/* ---------- 锚点筛选条 ---------- */
.filter-wrap{background:#fff;border-bottom:1px solid var(--c-line);position:sticky;top:var(--nav-h);z-index:40}
.filter-bar{display:flex;gap:10px;overflow-x:auto;padding:18px 0;scrollbar-width:none}
.filter-bar::-webkit-scrollbar{display:none}
.chip{
  flex:none;
  height:38px;
  padding:0 18px;
  border-radius:var(--r-pill);
  border:1px solid var(--c-line-strong);
  background:#fff;
  color:var(--c-text-2);
  font-size:14px;
  font-weight:500;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.chip:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-50)}
.chip.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-2);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform .2s cubic-bezier(.2,.7,.3,1),box-shadow .2s cubic-bezier(.2,.7,.3,1);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-3)}
.card:active{transform:translateY(0)}
.card-media{aspect-ratio:16/9;background:#EEF4FB;overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s cubic-bezier(.2,.7,.3,1)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:18px;line-height:1.5}
.card-body p{font-size:15px;line-height:1.75}
.card-foot{margin-top:auto;padding-top:8px}
.card.is-hidden{display:none}
.grid-empty{
  display:none;
  padding:56px 24px;
  text-align:center;
  background:#fff;
  border:1px dashed var(--c-line-strong);
  border-radius:var(--r-card);
  color:var(--c-text-3);
}
.grid-empty svg{color:var(--c-line-strong);margin:0 auto 12px}
.grid-empty p{font-size:14px;color:var(--c-text-2)}
.grid-empty span{display:block;font-size:13px;color:var(--c-text-3);margin-top:6px}

/* ---------- 深色属性面板 ---------- */
.panel-dark{
  background:var(--c-dark);
  border-radius:var(--r-l);
  padding:44px 40px;
  color:#E8EDF4;
  box-shadow:var(--sh-3);
}
.panel-dark .panel-head{display:flex;flex-wrap:wrap;gap:16px;align-items:baseline;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.12);padding-bottom:22px}
.panel-dark h2{color:#fff}
.panel-dark .panel-head p{color:rgba(232,237,244,.68);font-size:14px;max-width:420px}
.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:28px}
.tier{border-top:2px solid rgba(255,255,255,.14);padding-top:20px}
.tier.is-featured{border-top-color:var(--c-teal)}
.tier-name{font-size:15px;font-weight:600;color:#fff;letter-spacing:.02em}
.tier-price{margin-top:8px;font-size:28px;font-weight:600;font-family:"Inter","DIN Alternate",system-ui,sans-serif;font-variant-numeric:tabular-nums;color:#fff}
.tier-price.highlight{color:var(--c-orange)}
.tier-price em{font-style:normal;font-size:13px;font-weight:500;color:rgba(232,237,244,.6);margin-left:6px}
.tier-list{margin-top:18px}
.tier-list li{font-size:14px;line-height:1.7;color:rgba(232,237,244,.78);padding:9px 0;border-bottom:1px solid rgba(255,255,255,.08)}
.tier-list li:last-child{border-bottom:0}
.tier-note{margin-top:14px;font-size:12px;color:rgba(232,237,244,.5)}

/* ---------- 要点列表 ---------- */
.split{display:grid;grid-template-columns:0.9fr 1.1fr;gap:48px;align-items:start}
.checklist{margin-top:8px}
.checklist li{position:relative;padding:14px 0 14px 24px;border-bottom:1px solid var(--c-line);font-size:15px;line-height:1.7;color:var(--c-text-2)}
.checklist li:last-child{border-bottom:0}
.checklist li::before{content:"";position:absolute;left:0;top:24px;width:12px;height:1px;background:var(--c-primary)}
.checklist strong{color:var(--c-text);font-weight:600}
.note-line{margin-top:20px;font-size:13px;color:var(--c-text-3)}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto}
.faq details{border-bottom:1px solid var(--c-line)}
.faq summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:60px;
  padding:14px 0;
  font-size:16px;
  font-weight:600;
  color:var(--c-text);
  cursor:pointer;
  list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";
  flex:none;
  font-size:20px;
  font-weight:400;
  line-height:1;
  color:var(--c-text-3);
  transition:color .18s ease;
}
.faq details[open] summary::after{content:"−";color:var(--c-primary)}
.faq summary:hover{color:var(--c-primary)}
.faq-a{max-width:720px;padding:0 0 22px;font-size:15px;line-height:1.8;color:var(--c-text-2)}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  background:#F2F6FC;
  border-radius:var(--r-l);
  padding:64px 48px;
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:48px;
  align-items:center;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  right:0;
  bottom:0;
  width:340px;
  height:100%;
  background:url(/assets/images/backpic/back-3.webp) center/cover no-repeat;
  opacity:.10;
  pointer-events:none;
}
.cta-copy{position:relative;z-index:1}
.cta-copy h2{margin-bottom:14px;max-width:420px}
.cta-copy p{max-width:460px;font-size:15px;line-height:1.8}
.cta-points{display:flex;flex-wrap:wrap;gap:18px;margin-top:22px}
.cta-points span{position:relative;padding-left:14px;font-size:13px;color:var(--c-text-2)}
.cta-points span::before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:50%;background:var(--c-teal)}
.cta-card{position:relative;z-index:1;background:#fff;border-radius:var(--r-card);box-shadow:var(--sh-3);padding:28px;max-width:400px;width:100%}
.tier-switch{display:flex;gap:6px;background:var(--c-primary-25);border-radius:var(--r-pill);padding:4px}
.tier-switch button{
  flex:1;
  height:36px;
  border-radius:var(--r-pill);
  font-size:13px;
  font-weight:500;
  color:var(--c-text-2);
  transition:background-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.tier-switch button:hover{color:var(--c-primary)}
.tier-switch button.active{background:#fff;color:var(--c-primary);box-shadow:var(--sh-1)}
.price-row{display:flex;align-items:baseline;gap:8px;margin:22px 0 6px}
.price-num{font-size:32px;font-weight:600;line-height:1;font-family:"Inter","DIN Alternate",system-ui,sans-serif;font-variant-numeric:tabular-nums;color:var(--c-text)}
.price-num.is-orange{color:var(--c-orange)}
.price-unit{font-size:14px;color:var(--c-text-3)}
.price-desc{font-size:13px;color:var(--c-text-3);min-height:20px}
.cta-card .btn{width:100%;margin-top:20px}
.pay-row{display:flex;align-items:center;gap:12px;margin-top:16px;color:var(--c-text-3)}
.pay-row svg{width:22px;height:22px}
.pay-row span{font-size:12px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-footer);border-top:1px solid var(--c-line);padding:64px 0 40px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .logo{font-size:16px;font-weight:700}
.footer-desc{margin-top:16px;max-width:300px;font-size:13px;line-height:1.75;color:var(--c-text-3)}
.footer-icons{display:flex;gap:14px;margin-top:18px;color:var(--c-text-3)}
.footer-icons span{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;border:1px solid var(--c-line);border-radius:10px;background:#fff}
.footer-icons svg{width:17px;height:17px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--c-text);margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:14px;color:var(--c-text-2);transition:color .18s ease}
.footer-col ul a:hover{color:var(--c-primary)}
.footer-note{font-size:13px;line-height:1.75;color:var(--c-text-3)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  align-items:center;
  justify-content:space-between;
  margin-top:44px;
  padding-top:22px;
  border-top:1px solid var(--c-line);
  font-size:13px;
  color:var(--c-text-3);
}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:18px}
.footer-bottom-links a{color:var(--c-text-3);transition:color .18s ease}
.footer-bottom-links a:hover{color:var(--c-primary)}

/* ---------- 移动端底部条 ---------- */
.mobile-cta-bar{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  height:60px;
  display:none;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:0 16px;
  background:#fff;
  border-top:1px solid var(--c-line);
  box-shadow:0 -4px 16px -8px rgba(16,22,31,.18);
  z-index:55;
}
.mobile-cta-bar .bar-price{font-size:14px;color:var(--c-text-2)}
.mobile-cta-bar .bar-price b{font-size:18px;color:var(--c-orange);font-family:"Inter","DIN Alternate",system-ui,sans-serif;font-variant-numeric:tabular-nums}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1200px}
}
@media (max-width:1023px){
  :root{--sp-section:72px;--nav-h:64px}
  .container{padding:0 20px}
  .hero-compact{padding:52px 0 40px}
  .split{grid-template-columns:1fr;gap:32px}
  .tier-grid{grid-template-columns:1fr;gap:22px}
  .cta-band{grid-template-columns:1fr;gap:32px;padding:48px 32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:767px){
  :root{--sp-section:56px;--nav-h:60px}
  body{padding-bottom:60px}
  .container{padding:0 16px}
  .nav-links,.header-actions{display:none}
  .nav-toggle{display:inline-flex}
  .hero-compact{padding:40px 0 32px}
  .hero-compact h1{font-size:1.6rem}
  .metrics-grid{grid-template-columns:1fr 1fr}
  .metric{border-right:0;border-bottom:1px solid var(--c-line);padding:18px 16px}
  .metric:nth-child(odd){border-right:1px solid var(--c-line)}
  .metric:nth-last-child(-n+2){border-bottom:0}
  .filter-wrap{top:60px}
  .card-grid{grid-template-columns:1fr}
  .panel-dark{padding:30px 22px}
  .cta-band{padding:36px 20px;border-radius:16px}
  .cta-card{max-width:none}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding:40px 0 28px}
  .footer-bottom{margin-top:32px}
  .mobile-cta-bar{display:flex}
  .section-tight{padding:48px 0}
}
@media (max-width:575px){
  .hero-actions .btn{width:100%}
  .tier-switch button{font-size:12px;padding:0 4px}
  .metric-value{font-size:24px}
  .price-num{font-size:28px}
  .faq summary{font-size:15px;min-height:56px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
  .card:hover{transform:none}
  .card:hover .card-media img{transform:none}
}