/* roulang page: index */
:root{
  --brand:#1F6FE5;
  --brand-dark:#1558BE;
  --brand-light:#E8F0FE;
  --brand-soft:#F2F7FD;
  --ink:#0D1B2A;
  --muted:#52657A;
  --bg:#F7FAFD;
  --card:#FFFFFF;
  --line:#DCE7F5;
  --teal:#0EA5A4;
  --amber:#F2A93B;
  --danger:#D94A4A;
  --radius-card:16px;
  --radius-btn:12px;
  --shadow-sm:0 8px 24px rgba(18,52,96,.08);
  --shadow-lg:0 16px 40px rgba(18,52,96,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.78;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
h1,h2,h3,h4,p,dl,dd,dt,figure{margin:0}
ul{margin:0;padding:0;list-style:none}
::selection{background:rgba(31,111,229,.16)}

.container-x{width:100%;max-width:1280px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container-x{padding:0 24px}}
@media (min-width:1024px){.container-x{padding:0 32px}}

/* 导航 */
.site-nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(255,255,255,.55);
  backdrop-filter:blur(16px) saturate(160%);
  -webkit-backdrop-filter:blur(16px) saturate(160%);
  border-bottom:1px solid rgba(255,255,255,.6);
  transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.site-nav.nav-scrolled{
  background:rgba(255,255,255,.94);
  border-bottom-color:var(--line);
  box-shadow:0 8px 24px rgba(18,52,96,.08);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:76px}
.brand{display:flex;align-items:center;gap:12px;font-weight:700;font-size:18px;letter-spacing:.01em;white-space:nowrap}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:none;
  background:linear-gradient(140deg,#2F82F0,#1558BE);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 18px rgba(31,111,229,.32);
}
.brand-mark span{display:block;width:16px;height:16px;border:2px solid #fff;border-radius:4px;position:relative}
.brand-mark span::after{content:"";position:absolute;left:3px;top:3px;width:6px;height:6px;background:#fff;border-radius:2px}
.nav-links{display:none;align-items:center;gap:4px}
@media (min-width:1024px){.nav-links{display:flex}}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;border-radius:10px;
  font-size:15px;color:#31465c;transition:color .2s ease,background-color .2s ease;
}
.nav-link:hover{color:var(--brand);background:rgba(31,111,229,.08)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;border-radius:2px;background:var(--brand);
}
.nav-right{display:flex;align-items:center;gap:10px}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;border:1px solid transparent;background:transparent;color:#31465c;cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.icon-btn:hover{background:rgba(31,111,229,.09);color:var(--brand)}
.icon-btn:focus-visible{outline:2px solid rgba(31,111,229,.55);outline-offset:2px}
.nav-search{display:none;align-items:center;background:#fff;border:1px solid var(--line);border-radius:12px;padding:0 12px;height:44px;width:220px}
.nav-search.is-open{display:flex}
.nav-search input{border:0;outline:0;width:100%;background:transparent;font-size:14px;color:var(--ink)}
.nav-search input::placeholder{color:#93a5b8}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(31,111,229,.28)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 14px 30px rgba(31,111,229,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(31,111,229,.24)}
.btn-ghost{background:rgba(255,255,255,.85);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{background:#fff;border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-outline{background:transparent;color:var(--brand);border-color:rgba(31,111,229,.42)}
.btn-outline:hover{background:var(--brand-light);transform:translateY(-1px)}
.btn-sm{height:42px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn:focus-visible{outline:2px solid rgba(31,111,229,.55);outline-offset:2px}
.btn[disabled]{opacity:.5;pointer-events:none}
.nav-cta{display:none}
@media (min-width:1024px){.nav-cta{display:inline-flex}}
.hamburger{display:inline-flex}
@media (min-width:1024px){.hamburger{display:none}}
.mobile-drawer{
  position:fixed;inset:0;z-index:70;display:none;
}
.mobile-drawer.is-open{display:block}
.drawer-backdrop{position:absolute;inset:0;background:rgba(13,27,42,.4)}
.drawer-panel{
  position:absolute;right:0;top:0;bottom:0;width:min(84vw,360px);
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  border-left:1px solid rgba(255,255,255,.7);
  box-shadow:-16px 0 44px rgba(18,52,96,.16);
  padding:22px 20px 28px;display:flex;flex-direction:column;
  animation:drawerIn .26s ease;
}
@keyframes drawerIn{from{transform:translateX(24px);opacity:.4}to{transform:translateX(0);opacity:1}}
.drawer-link{
  display:flex;align-items:center;height:52px;padding:0 14px;border-radius:12px;
  font-size:16px;color:#1d3348;transition:background-color .2s ease,color .2s ease;
}
.drawer-link:hover,.drawer-link.is-active{background:rgba(31,111,229,.1);color:var(--brand);font-weight:600}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line)}

/* Hero */
.hero{position:relative;isolation:isolate;overflow:hidden}
.hero-bg{
  position:absolute;inset:0;z-index:-3;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.hero-tint{
  position:absolute;inset:0;z-index:-2;
  background:linear-gradient(140deg,rgba(247,250,253,.95) 8%,rgba(232,240,254,.88) 52%,rgba(247,250,253,.9) 100%);
}
.hero-grid{
  position:absolute;inset:0;z-index:-1;
  background-image:radial-gradient(rgba(31,111,229,.16) 1px,transparent 1px);
  background-size:22px 22px;opacity:.55;
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.75),transparent 88%);
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.75),transparent 88%);
}
.hero-ornament{
  position:absolute;right:-70px;top:110px;width:340px;height:340px;border-radius:36px;z-index:-1;
  background-image:
    repeating-linear-gradient(45deg,rgba(31,111,229,.6) 0 1px,transparent 1px 16px),
    repeating-linear-gradient(-45deg,rgba(31,111,229,.6) 0 1px,transparent 1px 16px);
  opacity:.055;pointer-events:none;
}
.hero-card{
  background:rgba(255,255,255,.72);
  backdrop-filter:blur(18px) saturate(160%);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  border:1px solid rgba(255,255,255,.78);
  border-radius:24px;
  padding:32px 26px;
  box-shadow:var(--shadow-lg);
}
@media (min-width:768px){.hero-card{padding:44px 44px 40px}}
.chip{
  display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 14px;border-radius:999px;
  background:rgba(31,111,229,.1);color:var(--brand);font-size:13px;font-weight:600;letter-spacing:.02em;
}
.chip::before{content:"";width:7px;height:7px;border-radius:999px;background:var(--teal)}
.stat-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.stat-num{font-size:24px;font-weight:700;line-height:1.2;color:var(--ink);font-variant-numeric:tabular-nums}
.stat-num em{font-style:normal;font-size:14px;font-weight:600;color:var(--muted);margin-left:4px}
.stat-label{font-size:13px;color:var(--muted);margin-top:4px}

/* 板块 */
.section{padding:56px 0}
@media (min-width:768px){.section{padding:80px 0}}
@media (min-width:1024px){.section{padding:104px 0}}
.section-tag{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--brand);
  background:var(--brand-light);border-radius:999px;padding:6px 14px;
}
.section-title{font-size:clamp(24px,3vw,36px);font-weight:700;line-height:1.28;letter-spacing:-.01em}
.section-desc{color:var(--muted);font-size:16px;line-height:1.85}
.divider{height:1px;background:var(--line)}

/* 对比表 */
.plan-wrap{
  background:var(--card);border:1px solid var(--line);border-radius:20px;
  box-shadow:var(--shadow-sm);overflow:hidden;
}
.plan-scroll{overflow-x:auto;scrollbar-width:thin}
.plan-table{width:100%;border-collapse:separate;border-spacing:0;min-width:860px}
.plan-table th,.plan-table td{padding:18px 20px;text-align:center;font-size:15px;border-bottom:1px solid var(--line)}
.plan-table thead th{
  position:sticky;top:0;background:#fff;font-size:16px;font-weight:700;color:var(--ink);z-index:2;
  padding-top:24px;padding-bottom:18px;
}
.plan-table thead th small{display:block;font-size:12.5px;font-weight:500;color:var(--muted);margin-top:6px}
.plan-table tbody tr:nth-child(even){background:var(--brand-soft)}
.plan-table tbody tr:hover{background:#e9f2fe}
.plan-table .feat{text-align:left;font-weight:600;color:var(--ink);font-size:15px}
.plan-table .col-hot{background:linear-gradient(180deg,#eef5ff,#e6f0ff) !important}
.plan-table thead th.col-hot{background:#dfebff !important}
.plan-table tfoot td{padding:22px 20px;border-bottom:0;background:#fff}
.mark-yes{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:999px;background:rgba(14,165,164,.14);color:var(--teal);font-size:13px;font-weight:700}
.mark-no{color:#b6c5d6;font-size:15px}
.hot-badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:rgba(242,169,59,.18);color:#a9701a;font-size:12px;font-weight:700;margin-left:8px;
  vertical-align:middle;
}
.scroll-hint{display:block;font-size:13px;color:var(--muted);margin-top:12px}
@media (min-width:768px){.scroll-hint{display:none}}

/* 等级阶梯 */
.tier-list{display:grid;gap:18px}
.tier-card{
  position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px 24px;box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  display:grid;grid-template-columns:1fr;gap:18px;
}
.tier-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:#c7dbf3}
@media (min-width:900px){
  .tier-card{grid-template-columns:230px 1fr;gap:32px;align-items:center;padding:28px 32px}
  .tier-card:nth-child(2){margin-left:24px}
  .tier-card:nth-child(3){margin-left:48px}
  .tier-card:nth-child(4){margin-left:72px}
}
.tier-card.is-hot{border-color:rgba(242,169,59,.65);background:linear-gradient(180deg,#fffdf8,#fff)}
.tier-head{display:flex;align-items:center;gap:14px}
.tier-icon{
  width:46px;height:46px;border-radius:13px;flex:none;display:flex;align-items:center;justify-content:center;
  background:var(--brand-light);color:var(--brand);font-weight:700;font-size:16px;
}
.tier-card.is-hot .tier-icon{background:rgba(242,169,59,.18);color:#a9701a}
.tier-name{font-size:19px;font-weight:700}
.tier-sub{font-size:13px;color:var(--muted);margin-top:2px}
.tier-points{display:grid;gap:10px}
.tier-points li{display:flex;gap:10px;font-size:15px;color:#2c4258;line-height:1.7}
.tier-points li::before{
  content:"";width:8px;height:8px;border-radius:999px;background:var(--brand);flex:none;margin-top:9px;
}
.tier-card.is-hot .tier-points li::before{background:var(--amber)}
.tier-bar{height:6px;border-radius:999px;background:#e8f0fa;overflow:hidden;margin-top:6px}
.tier-bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#4b90f0,#1F6FE5)}
.tier-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}
.badge-soft{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--brand-light);color:var(--brand);font-size:12.5px;font-weight:600;
}
.badge-amber{background:rgba(242,169,59,.2);color:#9b6712}

/* 内容预览横向滚动 */
.rail{
  display:flex;gap:20px;overflow-x:auto;padding:6px 4px 22px;
  scroll-snap-type:x mandatory;scrollbar-width:thin;
}
.rail::-webkit-scrollbar{height:8px}
.rail::-webkit-scrollbar-thumb{background:#c8dbf2;border-radius:999px}
.content-card{
  flex:0 0 78%;max-width:300px;scroll-snap-align:start;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:transform .25s ease,box-shadow .25s ease;
}
@media (min-width:640px){.content-card{flex:0 0 320px}}
@media (min-width:1024px){.content-card{flex:0 0 300px}}
.content-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.content-cover{position:relative;aspect-ratio:16/10;background:#eaf2fb;overflow:hidden}
.content-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.content-card:hover .content-cover img{transform:scale(1.05)}
.lock-veil{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(13,27,42,.42);
  backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px);
}
.lock-veil span{
  display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 14px;border-radius:999px;
  background:rgba(255,255,255,.92);color:var(--brand);font-size:13px;font-weight:700;
}
.content-body{padding:18px 18px 20px}
.content-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--muted)}
.content-title{font-size:16.5px;font-weight:700;line-height:1.5;margin-top:10px}
.content-desc{font-size:13.5px;color:var(--muted);line-height:1.7;margin-top:8px}
.content-foot{display:flex;align-items:center;justify-content:space-between;margin-top:16px}

/* 资讯列表 */
.news-item{
  display:grid;grid-template-columns:1fr;gap:16px;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:16px;box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease,background-color .25s ease;
}
.news-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:#c7dbf3;background:#fbfdff}
@media (min-width:768px){.news-item{grid-template-columns:216px 1fr;gap:24px;padding:18px}}
.news-thumb{aspect-ratio:16/10;border-radius:12px;overflow:hidden;background:#eef4fb}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.news-item:hover .news-thumb img{transform:scale(1.05)}
.news-title{font-size:17px;font-weight:700;line-height:1.55;margin-top:10px;transition:color .2s ease}
.news-item:hover .news-title{color:var(--brand)}
.news-sum{font-size:14.5px;color:var(--muted);line-height:1.78;margin-top:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-more{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:600;color:var(--brand);margin-top:12px}
.tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;background:var(--brand-light);color:var(--brand);font-size:12.5px;font-weight:600}
.empty-state{
  border:1px dashed #c2d6ee;border-radius:var(--radius-card);background:#fbfdff;
  padding:44px 24px;text-align:center;color:var(--muted);font-size:15px;
}
.empty-state strong{display:block;color:var(--ink);font-size:16px;margin-bottom:6px}

/* FAQ */
.faq-item{border:1px solid var(--line);border-radius:14px;background:#fff;margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.is-open{border-color:rgba(31,111,229,.45);box-shadow:0 8px 24px rgba(18,52,96,.08)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:64px;padding:16px 20px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);
}
.faq-q:hover{color:var(--brand)}
.faq-q:focus-visible{outline:2px solid rgba(31,111,229,.5);outline-offset:-2px}
.faq-icon{
  width:28px;height:28px;flex:none;border-radius:999px;background:var(--brand-light);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;
  transition:transform .28s ease,background-color .28s ease,color .28s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--brand);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-a-inner{padding:0 20px 20px;font-size:15px;color:var(--muted);line-height:1.85}

/* 表单 / CTA */
.join-panel{
  background:linear-gradient(150deg,#eaf2ff 0%,#f6faff 62%,#ffffff 100%);
  border:1px solid #d7e6fa;border-radius:24px;padding:32px 24px;box-shadow:var(--shadow-sm);
}
@media (min-width:768px){.join-panel{padding:52px 48px}}
.field{display:block}
.field-label{display:block;font-size:13.5px;font-weight:600;color:#31465c;margin-bottom:8px}
.input{
  width:100%;height:50px;padding:0 14px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--ink);font-size:15px;transition:border-color .2s ease,box-shadow .2s ease;
}
.input::placeholder{color:#9aabbd}
.input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,111,229,.18)}
.form-note{font-size:12.5px;color:var(--muted);margin-top:12px;line-height:1.7}

/* 页脚 */
.site-footer{background:#0D1B2A;color:#c4d2e2;margin-top:20px}
.footer-brand-name{color:#fff;font-weight:700;font-size:18px}
.footer-title{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer-link{display:inline-flex;align-items:center;min-height:34px;font-size:14.5px;color:#a9bcd0;transition:color .2s ease,transform .2s ease}
.footer-link:hover{color:#7FB2F5;transform:translateX(2px)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:44px;padding-top:22px;font-size:13px;color:#8fa3b8}
.to-top{
  position:fixed;right:20px;bottom:24px;z-index:50;width:46px;height:46px;border-radius:14px;
  background:#fff;border:1px solid var(--line);color:var(--brand);display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-sm);cursor:pointer;opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease;
}
.to-top.is-show{opacity:1;pointer-events:auto}
.to-top:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
@media (max-width:520px){
  .stat-row{grid-template-columns:1fr;gap:12px}
  .hero-card{padding:24px 18px}
  .nav-inner{height:68px}
  .btn{width:100%}
  .btn-sm,.nav-cta{width:auto}
}

/* roulang page: article */
:root{
    --brand:#1F6FE5;
    --brand-dark:#1A5FC7;
    --brand-soft:#E8F1FE;
    --ink:#0D1B2A;
    --ink-2:#33475C;
    --muted:#52657A;
    --bg:#F7FAFD;
    --card:#FFFFFF;
    --line:#DCE7F5;
    --teal:#0EA5A4;
    --amber:#F2A93B;
    --danger:#D94A4A;
    --r-card:16px;
    --r-btn:12px;
    --sh-1:0 8px 24px rgba(18,52,96,.08);
    --sh-2:0 16px 40px rgba(18,52,96,.12);
    --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    font-family:var(--font-cn);
    background:var(--bg);
    color:var(--ink-2);
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.3}
  p{margin:0}
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block}
  button,input{font-family:inherit}
  .container-x{width:100%;max-width:1280px;margin:0 auto;padding-left:20px;padding-right:20px}
  @media (min-width:768px){.container-x{padding-left:24px;padding-right:24px}}
  @media (min-width:1024px){.container-x{padding-left:32px;padding-right:32px}}
  .section{padding:64px 0}
  @media (min-width:1024px){.section{padding:100px 0}}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--brand);
    background:rgba(31,111,229,.08);border:1px solid rgba(31,111,229,.16);
    padding:6px 14px;border-radius:999px;
  }
  .section-head{max-width:720px}
  .section-head h2{font-size:clamp(24px,3.2vw,34px);letter-spacing:-.01em}
  .section-head p{margin-top:14px;color:var(--muted);font-size:16px}

  /* ---------- 导航 ---------- */
  .site-header{
    position:fixed;top:0;left:0;right:0;z-index:60;
    background:rgba(255,255,255,.55);
    -webkit-backdrop-filter:blur(16px) saturate(160%);
    backdrop-filter:blur(16px) saturate(160%);
    border-bottom:1px solid rgba(255,255,255,.6);
    transition:background .28s ease,box-shadow .28s ease,border-color .28s ease;
  }
  .site-header.nav-scrolled{
    background:rgba(255,255,255,.94);
    border-bottom-color:var(--line);
    box-shadow:var(--sh-1);
  }
  .nav-inner{display:flex;align-items:center;gap:20px;height:76px}
  .brand{display:inline-flex;align-items:center;gap:11px;flex-shrink:0}
  .brand-mark{
    position:relative;width:34px;height:34px;border-radius:10px;flex-shrink:0;
    background:linear-gradient(135deg,#1F6FE5,#0EA5A4);
    display:inline-flex;align-items:center;justify-content:center;
    box-shadow:0 6px 16px rgba(31,111,229,.28);
  }
  .brand-mark::before{content:"";width:15px;height:11px;border-radius:3px;background:#fff;box-shadow:0 0 0 2px rgba(255,255,255,.30)}
  .brand-mark span{position:absolute;right:6px;bottom:6px;width:6px;height:6px;border-radius:50%;background:var(--amber)}
  .brand-name{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:.01em;white-space:nowrap}
  .nav-links{display:none;align-items:center;gap:4px;margin-left:8px}
  @media (min-width:1024px){.nav-links{display:flex}}
  .nav-link{
    display:inline-flex;align-items:center;min-height:40px;padding:8px 13px;border-radius:10px;
    font-size:15px;font-weight:500;color:var(--ink-2);transition:background .2s,color .2s;
  }
  .nav-link:hover{background:var(--brand-soft);color:var(--brand)}
  .nav-link.is-active{color:var(--brand);font-weight:600;background:rgba(31,111,229,.09)}
  .nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
  .icon-btn{
    width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
    color:var(--ink-2);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
    transition:background .2s,color .2s,border-color .2s;
  }
  .icon-btn:hover{background:var(--brand-soft);color:var(--brand);border-color:rgba(31,111,229,.3)}
  .icon-btn:focus-visible{outline:none;box-shadow:0 0 0 2px #fff,0 0 0 4px rgba(31,111,229,.45)}
  .nav-login{display:none;font-size:15px;font-weight:500;color:var(--ink-2);padding:8px 12px;border-radius:10px}
  .nav-login:hover{background:var(--brand-soft);color:var(--brand)}
  @media (min-width:768px){.nav-login{display:inline-flex}}
  .hamburger{
    display:inline-flex;flex-direction:column;justify-content:center;gap:4px;
    width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;
  }
  .hamburger span{display:block;width:16px;height:2px;margin:0 auto;border-radius:2px;background:var(--ink-2);transition:transform .2s}
  @media (min-width:1024px){.hamburger{display:none}}
  .search-panel{display:none;border-top:1px solid var(--line);background:rgba(255,255,255,.96);padding:14px 0}
  .search-panel.is-open{display:block}
  .search-form{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:8px 10px 8px 16px}
  .search-form i{color:var(--muted)}
  .search-form input{flex:1;border:0;outline:none;font-size:15px;color:var(--ink);background:transparent;padding:8px 0;min-height:40px}
  .search-form input::placeholder{color:#8fa3b8}
  .mobile-drawer{
    display:none;position:absolute;top:76px;left:0;right:0;
    background:rgba(255,255,255,.96);
    -webkit-backdrop-filter:blur(18px) saturate(160%);
    backdrop-filter:blur(18px) saturate(160%);
    border-top:1px solid var(--line);box-shadow:var(--sh-2);
    padding:14px 20px 22px;
  }
  .mobile-drawer.is-open{display:block}
  @media (min-width:1024px){.mobile-drawer.is-open{display:none}}
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;
    min-height:48px;padding:10px 12px;border-radius:12px;font-size:16px;color:var(--ink-2);font-weight:500;
  }
  .drawer-link:hover{background:var(--brand-soft);color:var(--brand)}

  /* ---------- 按钮 ---------- */
  .btn-primary{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:45px;padding:11px 22px;border:1px solid transparent;border-radius:var(--r-btn);
    background:var(--brand);color:#fff;font-size:15px;font-weight:600;cursor:pointer;
    box-shadow:0 6px 18px rgba(31,111,229,.25);
    transition:background .2s,transform .2s,box-shadow .2s;
  }
  .btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 26px rgba(31,111,229,.32)}
  .btn-primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(31,111,229,.22)}
  .btn-primary:focus-visible{outline:none;box-shadow:0 0 0 2px #fff,0 0 0 4px rgba(31,111,229,.45)}
  .btn-secondary{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:45px;padding:11px 22px;border:1px solid var(--line);border-radius:var(--r-btn);
    background:#fff;color:var(--ink);font-size:15px;font-weight:600;cursor:pointer;
    transition:background .2s,border-color .2s,transform .2s,box-shadow .2s;
  }
  .btn-secondary:hover{background:var(--brand-soft);border-color:rgba(31,111,229,.3);color:var(--brand);transform:translateY(-1px)}
  .btn-secondary:focus-visible{outline:none;box-shadow:0 0 0 2px #fff,0 0 0 4px rgba(31,111,229,.35)}
  .btn-sm{min-height:40px;padding:8px 16px;font-size:14px}
  .btn-block{width:100%}
  .badge-soft{
    display:inline-flex;align-items:center;gap:6px;
    font-size:13px;font-weight:600;padding:5px 12px;border-radius:999px;
    background:var(--brand-soft);color:var(--brand);border:1px solid rgba(31,111,229,.18);
  }
  .badge-teal{background:rgba(14,165,164,.1);color:#0b8483;border-color:rgba(14,165,164,.22)}

  /* ---------- 文章头部 ---------- */
  .article-hero{position:relative;overflow:hidden;padding:132px 0 52px;background:#EFF5FD}
  .article-hero .hero-bg{
    position:absolute;inset:0;background-size:cover;background-position:center;
    opacity:.36;
  }
  .article-hero::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(247,250,253,.86) 0%,rgba(247,250,253,.94) 55%,var(--bg) 100%);
  }
  .article-hero > .container-x{position:relative;z-index:2}
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted)}
  .breadcrumb a{color:var(--muted)}
  .breadcrumb a:hover{color:var(--brand)}
  .breadcrumb .sep{color:#b8c8da}
  .breadcrumb .current{color:var(--ink);font-weight:500;max-width:min(560px,70vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .article-hero h1{
    margin-top:20px;font-size:clamp(28px,4.2vw,44px);line-height:1.32;letter-spacing:-.015em;max-width:900px;
  }
  .hero-lead{margin-top:16px;max-width:760px;font-size:16.5px;color:var(--muted)}
  .meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:22px}
  .meta-item{display:inline-flex;align-items:center;gap:7px;font-size:14px;color:var(--muted)}
  .meta-item i{color:#93a8bd}
  .share-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:24px}
  .share-btn{
    display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:8px 15px;
    border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;color:var(--ink-2);
    font-size:14px;font-weight:500;cursor:pointer;transition:background .2s,color .2s,border-color .2s;
  }
  .share-btn:hover{background:var(--brand-soft);color:var(--brand);border-color:rgba(31,111,229,.3)}
  .share-btn:focus-visible{outline:none;box-shadow:0 0 0 2px #fff,0 0 0 4px rgba(31,111,229,.4)}
  .toast{
    display:none;align-items:center;gap:8px;font-size:13.5px;color:#0b8483;
    background:rgba(14,165,164,.1);border:1px solid rgba(14,165,164,.24);
    padding:7px 14px;border-radius:999px;
  }
  .toast.is-show{display:inline-flex}

  /* ---------- 正文布局 ---------- */
  .article-main{padding:56px 0 24px}
  .article-grid{display:grid;grid-template-columns:1fr;gap:36px}
  @media (min-width:1024px){
    .article-grid{grid-template-columns:250px minmax(0,1fr);gap:56px;align-items:start}
  }
  .toc-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    padding:22px 20px;box-shadow:var(--sh-1);
  }
  @media (min-width:1024px){.toc-card{position:sticky;top:104px}}
  .toc-title{font-size:15px;font-weight:700;color:var(--ink);display:flex;align-items:center;gap:8px}
  .toc-title i{color:var(--brand)}
  .toc-list{list-style:none;margin:14px 0 0;padding:0;max-height:52vh;overflow:auto}
  .toc-list li{margin:0 0 2px}
  .toc-list a{
    display:block;padding:8px 10px;border-radius:9px;font-size:14px;color:var(--muted);
    line-height:1.6;transition:background .2s,color .2s;
  }
  .toc-list a:hover{background:var(--brand-soft);color:var(--brand)}
  .toc-list a.is-current{background:rgba(31,111,229,.1);color:var(--brand);font-weight:600}
  .toc-aside-tip{
    margin-top:18px;padding-top:16px;border-top:1px dashed var(--line);
    font-size:13px;color:var(--muted);line-height:1.8;
  }

  .article-panel{
    background:var(--card);border:1px solid var(--line);border-radius:20px;
    padding:28px 22px;box-shadow:var(--sh-1);
  }
  @media (min-width:768px){.article-panel{padding:44px 48px}}
  .article-body{max-width:820px;font-size:17.5px;line-height:1.9;color:var(--ink-2)}
  .article-body > *:first-child{margin-top:0}
  .article-body h2{
    font-size:clamp(21px,2.4vw,26px);margin:2.1em 0 .75em;padding-left:14px;
    border-left:4px solid var(--brand);line-height:1.45;scroll-margin-top:104px;
  }
  .article-body h3{font-size:20px;margin:1.7em 0 .55em;color:var(--ink);scroll-margin-top:104px}
  .article-body h4{font-size:17.5px;margin:1.4em 0 .5em}
  .article-body p{margin:0 0 1.2em}
  .article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
  .article-body a:hover{color:var(--brand-dark)}
  .article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:1.45em}
  .article-body li{margin:.45em 0}
  .article-body blockquote{
    margin:1.6em 0;padding:16px 22px;background:var(--brand-soft);
    border-left:4px solid var(--brand);border-radius:0 14px 14px 0;color:var(--ink-2);
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body img{
    margin:1.7em auto;border-radius:14px;box-shadow:var(--sh-1);max-width:100%;height:auto;
  }
  .article-body figure{margin:1.7em 0}
  .article-body figcaption{margin-top:10px;text-align:center;font-size:13.5px;color:var(--muted)}
  .article-body table{
    width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15.5px;
    border:1px solid var(--line);border-radius:12px;overflow:hidden;
  }
  .article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
  .article-body th{background:#F1F6FD;color:var(--ink);font-weight:600}
  .article-body tr:last-child td{border-bottom:0}
  .article-body code{
    background:#EEF4FB;color:#1B4B8F;padding:2px 7px;border-radius:6px;font-size:.9em;
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  }
  .article-body pre{
    background:#0D1B2A;color:#E6EEF8;padding:18px 20px;border-radius:12px;overflow:auto;
    margin:1.6em 0;font-size:14.5px;line-height:1.7;
  }
  .article-body pre code{background:transparent;color:inherit;padding:0}
  .article-body hr{border:0;border-top:1px dashed var(--line);margin:2.2em 0}
  .empty-article{text-align:center;padding:40px 10px 30px}
  .empty-article i{font-size:34px;color:#a9bcd0}
  .empty-article h2{margin:18px 0 10px;font-size:22px;border:0;padding:0}
  .empty-article p{max-width:520px;margin:0 auto 22px;color:var(--muted);font-size:15.5px}

  /* ---------- 相关推荐 ---------- */
  .related-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:28px}
  @media (min-width:640px){.related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.related-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .rel-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
    box-shadow:var(--sh-1);transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column;
  }
  .rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
  .rel-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#E9F1FB}
  .rel-thumb img{width:100%;height:100%;object-fit:cover}
  .rel-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
  .rel-body h3{font-size:17px;line-height:1.5}
  .rel-body h3 a:hover{color:var(--brand)}
  .rel-body p{font-size:14.5px;color:var(--muted);flex:1}
  .rel-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:#8fa3b8}
  .rel-more{color:var(--brand);font-weight:600;font-size:14px}
  .rel-more:hover{color:var(--brand-dark)}

  /* ---------- 返回与 CTA ---------- */
  .back-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
  .cta-panel{
    margin-top:56px;background:linear-gradient(135deg,#1F6FE5 0%,#1857BE 100%);
    border-radius:22px;padding:32px 24px;color:#fff;box-shadow:0 20px 44px rgba(24,87,190,.28);
  }
  @media (min-width:768px){.cta-panel{padding:46px 48px}}
  .cta-panel h2{color:#fff;font-size:clamp(22px,3vw,30px)}
  .cta-panel p{margin-top:12px;color:rgba(255,255,255,.86);font-size:15.5px;max-width:620px}
  .cta-form{display:flex;flex-direction:column;gap:12px;margin-top:22px;max-width:520px}
  @media (min-width:640px){.cta-form{flex-direction:row}}
  .cta-form input{
    flex:1;min-height:47px;border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.35);
    background:rgba(255,255,255,.96);padding:12px 14px;font-size:15px;color:var(--ink);
  }
  .cta-form input:focus{outline:none;border-color:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.35)}
  .cta-form .btn-light{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:47px;
    padding:12px 24px;border-radius:var(--r-btn);border:0;cursor:pointer;
    background:#fff;color:var(--brand);font-weight:700;font-size:15px;
    transition:transform .2s,box-shadow .2s;
  }
  .cta-form .btn-light:hover{transform:translateY(-1px);box-shadow:0 12px 26px rgba(0,0,0,.18)}
  .cta-note{margin-top:14px;font-size:13px;color:rgba(255,255,255,.78)}

  /* ---------- 页脚 ---------- */
  .site-footer{background:#0D1B2A;color:#c3d3e2;margin-top:80px}
  .footer-brand-name{font-size:17px;font-weight:700;color:#fff}
  .footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
  .footer-link{display:inline-flex;align-items:center;min-height:32px;font-size:14.5px;color:#a9bcd0;transition:color .2s}
  .footer-link:hover{color:#7FB2FF}
  .footer-bottom{
    margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
    font-size:13px;color:#8fa3b8;
  }
  .totop{
    position:fixed;right:18px;bottom:22px;z-index:50;width:44px;height:44px;border-radius:12px;
    border:1px solid var(--line);background:#fff;color:var(--brand);cursor:pointer;
    display:none;align-items:center;justify-content:center;box-shadow:var(--sh-1);
  }
  .totop.is-show{display:inline-flex}
  .totop:hover{background:var(--brand-soft)}
  @media (max-width:520px){
    .site-header .nav-inner{height:68px}
    .mobile-drawer{top:68px}
    .article-hero{padding:112px 0 40px}
    .article-body{font-size:17px}
    .brand-name{font-size:15.5px}
  }

/* roulang page: category1 */
:root{
    --brand:#1F6FE5;
    --brand-dark:#1759BC;
    --brand-soft:#E8F1FE;
    --ink:#0D1B2A;
    --text:#20334A;
    --muted:#52657A;
    --muted-2:#7C8DA1;
    --bg:#F7FAFD;
    --card:#FFFFFF;
    --line:#DCE7F5;
    --cyan:#0EA5A4;
    --amber:#F2A93B;
    --danger:#D94A4A;
    --r-card:16px;
    --r-btn:12px;
    --r-lg:24px;
    --sh-1:0 8px 24px rgba(18,52,96,.08);
    --sh-2:0 16px 40px rgba(18,52,96,.12);
    --container:1280px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
    background:var(--bg);
    color:var(--text);
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  h1,h2,h3,h4,p,ul,ol,figure{margin:0}
  ul,ol{padding:0;list-style:none}
  a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease}
  img{max-width:100%;display:block}
  button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
  input{font:inherit;color:inherit}
  :focus-visible{outline:2px solid #7FB3F5;outline-offset:2px}
  body.no-scroll{overflow:hidden}

  .container-x{
    width:100%;
    max-width:var(--container);
    margin:0 auto;
    padding-left:20px;
    padding-right:20px;
  }
  @media (min-width:768px){.container-x{padding-left:24px;padding-right:24px}}
  @media (min-width:1024px){.container-x{padding-left:32px;padding-right:32px}}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:44px;
    padding:11px 22px;
    border-radius:var(--r-btn);
    font-size:15px;
    font-weight:600;
    line-height:1.2;
    border:1px solid transparent;
    transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease;
    white-space:nowrap;
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(31,111,229,.24)}
  .btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 14px 28px rgba(31,111,229,.30)}
  .btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(31,111,229,.24)}
  .btn-outline{background:#fff;color:var(--brand);border-color:var(--line);box-shadow:var(--sh-1)}
  .btn-outline:hover{background:var(--brand-soft);border-color:#BFD8F8;transform:translateY(-1px)}
  .btn-ghost{background:transparent;color:var(--text);border-color:transparent}
  .btn-ghost:hover{background:rgba(31,111,229,.08);color:var(--brand)}
  .btn-sm{min-height:40px;padding:9px 16px;font-size:14px}
  .btn-block{width:100%}
  .btn[disabled]{opacity:.55;pointer-events:none}

  .pill{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:6px 14px;
    border-radius:999px;
    background:var(--brand-soft);
    color:var(--brand);
    font-size:13px;
    font-weight:600;
    border:1px solid #CFE1FB;
  }
  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 11px;
    border-radius:999px;
    font-size:12.5px;
    font-weight:600;
    background:#EAF7F6;
    color:#0B7C7B;
    border:1px solid #C9ECEA;
  }
  .badge-amber{background:#FEF4E4;color:#A96A0B;border-color:#F7E1BB}
  .badge-slate{background:#EFF4FA;color:#4A637D;border-color:#DCE7F5}

  /* ---------- 导航 ---------- */
  .site-header{position:fixed;top:0;left:0;right:0;z-index:70}
  .nav-shell{
    background:rgba(255,255,255,.55);
    -webkit-backdrop-filter:blur(16px) saturate(160%);
    backdrop-filter:blur(16px) saturate(160%);
    border-bottom:1px solid rgba(255,255,255,.6);
    transition:background-color .3s ease,box-shadow .3s ease,border-color .3s ease;
  }
  .site-header.nav-scrolled .nav-shell{
    background:rgba(255,255,255,.94);
    border-bottom-color:var(--line);
    box-shadow:0 8px 24px rgba(18,52,96,.08);
  }
  .nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:72px}
  .brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
  .brand-mark{
    width:38px;height:38px;border-radius:12px;
    background:linear-gradient(135deg,#1F6FE5,#0EA5A4);
    display:grid;place-items:center;
    box-shadow:0 8px 20px rgba(31,111,229,.28);
    flex-shrink:0;
  }
  .brand-mark span{
    width:17px;height:17px;border-radius:5px;
    border:2px solid rgba(255,255,255,.95);
    position:relative;display:block;
  }
  .brand-mark span::after{
    content:"";position:absolute;right:-5px;bottom:-5px;
    width:7px;height:7px;border-radius:50%;
    background:#fff;box-shadow:0 0 0 2px rgba(31,111,229,.35);
  }
  .brand-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:.2px}

  .nav-links{display:none;align-items:center;gap:2px}
  @media (min-width:1024px){.nav-links{display:flex}}
  .nav-link{
    padding:9px 14px;
    border-radius:10px;
    font-size:15px;
    font-weight:500;
    color:#31506F;
    white-space:nowrap;
  }
  .nav-link:hover{color:var(--brand);background:rgba(31,111,229,.08)}
  .nav-link.is-active{color:var(--brand);background:rgba(31,111,229,.10);font-weight:600}

  .nav-actions{display:flex;align-items:center;gap:8px}
  .icon-btn{
    width:42px;height:42px;border-radius:11px;
    display:grid;place-items:center;
    color:#3B5673;font-size:15px;
    transition:background-color .2s ease,color .2s ease;
  }
  .icon-btn:hover{background:rgba(31,111,229,.10);color:var(--brand)}
  .nav-search{display:none;align-items:center;position:relative}
  @media (min-width:1024px){.nav-search{display:flex}}
  .nav-search input{
    width:0;opacity:0;padding:0;border:1px solid var(--line);
    border-radius:11px;background:#fff;height:42px;
    transition:width .3s ease,opacity .25s ease,padding .3s ease;
    font-size:14px;
  }
  .nav-search.is-open input{width:210px;opacity:1;padding:0 14px}
  .nav-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(31,111,229,.18)}
  .login-link{display:none}
  @media (min-width:1024px){.login-link{display:inline-flex}}

  .mobile-drawer{
    display:none;
    position:absolute;top:100%;left:0;right:0;
    background:rgba(255,255,255,.94);
    -webkit-backdrop-filter:blur(18px) saturate(160%);
    backdrop-filter:blur(18px) saturate(160%);
    border-bottom:1px solid var(--line);
    box-shadow:var(--sh-2);
    padding:14px 20px 22px;
  }
  .mobile-drawer.is-open{display:block}
  @media (min-width:1024px){.mobile-drawer{display:none !important}}
  .mobile-drawer .nav-link{display:block;padding:14px 12px;font-size:16px;border-radius:12px}
  .drawer-cta{margin-top:10px}

  /* ---------- Hero ---------- */
  .page-hero{
    position:relative;
    padding-top:104px;
    padding-bottom:64px;
    background-image:linear-gradient(180deg,rgba(247,250,253,.92),rgba(247,250,253,.98)),url("/assets/images/backpic/back-2.webp");
    background-size:cover;
    background-position:center;
    overflow:hidden;
  }
  .page-hero::after{
    content:"";
    position:absolute;inset:0;
    background-image:radial-gradient(rgba(31,111,229,.10) 1px,transparent 1px);
    background-size:22px 22px;
    opacity:.5;
    pointer-events:none;
  }
  .page-hero .container-x{position:relative;z-index:2}
  .breadcrumb{
    display:flex;align-items:center;gap:8px;
    font-size:13.5px;color:var(--muted-2);
    margin-bottom:22px;flex-wrap:wrap;
  }
  .breadcrumb a:hover{color:var(--brand)}
  .breadcrumb .current{color:var(--muted);font-weight:600}

  .hero-grid{display:grid;gap:40px;align-items:center}
  @media (min-width:1024px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px}}
  .hero-copy h1{
    font-size:clamp(30px,4.2vw,44px);
    font-weight:700;
    line-height:1.28;
    color:var(--ink);
    margin:18px 0 16px;
  }
  .hero-sub{font-size:17px;color:var(--muted);max-width:560px}
  .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
  .hero-stats{
    display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
    gap:12px;margin-top:34px;
    background:rgba(255,255,255,.72);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:18px;
    box-shadow:var(--sh-1);
  }
  .hero-stats li{text-align:left}
  .stat-num{font-size:20px;font-weight:700;color:var(--brand);line-height:1.3}
  .stat-label{font-size:12.5px;color:var(--muted-2);margin-top:2px}
  .hero-media{
    border-radius:var(--r-lg);
    overflow:hidden;
    box-shadow:var(--sh-2);
    border:1px solid var(--line);
    background:#fff;
  }
  .hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover}

  /* ---------- 通用板块 ---------- */
  .section{padding:88px 0}
  @media (max-width:768px){.section{padding:60px 0}}
  .section-head{max-width:720px;margin-bottom:44px}
  .section-head h2{
    font-size:clamp(24px,2.8vw,34px);
    font-weight:700;color:var(--ink);line-height:1.35;
    margin:14px 0 14px;
  }
  .section-head p{color:var(--muted);font-size:16px}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:600;color:var(--brand);
  }
  .eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand);display:block}

  /* ---------- 分栏内容 ---------- */
  .split{display:grid;gap:44px}
  @media (min-width:1024px){.split{grid-template-columns:1.35fr .9fr;gap:56px}}
  .check-list{display:grid;gap:14px;margin-top:26px}
  .check-list li{
    display:flex;gap:12px;align-items:flex-start;
    background:#fff;border:1px solid var(--line);
    border-radius:14px;padding:16px 18px;
    box-shadow:var(--sh-1);
    transition:transform .2s ease,box-shadow .2s ease;
  }
  .check-list li:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
  .check-list i{color:var(--brand);font-size:16px;margin-top:4px}
  .check-list strong{display:block;color:var(--ink);font-size:15.5px;font-weight:600}
  .check-list span{font-size:14.5px;color:var(--muted)}

  .note-panel{
    margin-top:26px;
    border-left:3px solid var(--brand);
    background:var(--brand-soft);
    border-radius:12px;
    padding:18px 20px;
    font-size:14.5px;
    color:#1B4275;
  }
  .note-panel strong{display:block;margin-bottom:6px;color:#123B70}

  .sticky-side{display:grid;gap:20px}
  @media (min-width:1024px){.sticky-side{position:sticky;top:104px;align-self:start}}
  .sticky-side figure{
    border-radius:var(--r-card);overflow:hidden;
    border:1px solid var(--line);box-shadow:var(--sh-1);background:#fff;
  }
  .sticky-side figure img{width:100%;aspect-ratio:16/11;object-fit:cover}
  .info-card{
    background:#fff;border:1px solid var(--line);
    border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1);
  }
  .info-card h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:12px}
  .info-card ul{display:grid;gap:10px}
  .info-card li{display:flex;justify-content:space-between;gap:12px;font-size:14px;color:var(--muted);border-bottom:1px dashed var(--line);padding-bottom:10px}
  .info-card li:last-child{border-bottom:0;padding-bottom:0}
  .info-card li b{color:var(--ink);font-weight:600}

  /* ---------- 步骤 ---------- */
  .steps{display:grid;gap:20px}
  @media (min-width:768px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1100px){.steps{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .step-card{
    position:relative;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:26px 24px 24px;
    box-shadow:var(--sh-1);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .step-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#C6DCF7}
  .step-index{
    display:inline-flex;align-items:center;justify-content:center;
    width:42px;height:42px;border-radius:12px;
    background:var(--brand-soft);color:var(--brand);
    font-weight:700;font-size:15px;margin-bottom:16px;
  }
  .step-card h3{font-size:17.5px;font-weight:700;color:var(--ink);margin-bottom:10px}
  .step-card p{font-size:14.8px;color:var(--muted)}
  .step-card .step-tag{margin-top:16px;display:inline-flex}

  /* ---------- 对比表 ---------- */
  .table-wrap{
    background:#fff;border:1px solid var(--line);
    border-radius:var(--r-card);box-shadow:var(--sh-1);
    overflow-x:auto;
  }
  table.compare{width:100%;border-collapse:collapse;min-width:760px}
  table.compare thead th{
    background:#F2F7FD;
    color:var(--ink);
    font-size:14.5px;font-weight:600;
    text-align:left;
    padding:16px 20px;
    border-bottom:1px solid var(--line);
    white-space:nowrap;
  }
  table.compare thead th:first-child{border-top-left-radius:var(--r-card)}
  table.compare thead th:last-child{border-top-right-radius:var(--r-card)}
  table.compare tbody td{
    padding:16px 20px;
    font-size:14.5px;
    color:var(--muted);
    border-bottom:1px solid #EDF4FB;
    vertical-align:middle;
  }
  table.compare tbody tr:nth-child(even) td{background:#FAFCFE}
  table.compare tbody tr:hover td{background:#F3F8FE}
  table.compare tbody td:first-child{color:var(--ink);font-weight:600}
  .dot-ok{color:var(--cyan);font-weight:600}
  .table-hint{margin-top:14px;font-size:13.5px;color:var(--muted-2)}

  /* ---------- 要点两列 ---------- */
  .tips-grid{display:grid;gap:20px}
  @media (min-width:768px){.tips-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  .tip-card{
    display:flex;gap:16px;align-items:flex-start;
    background:#fff;border:1px solid var(--line);
    border-radius:var(--r-card);padding:22px;
    box-shadow:var(--sh-1);
  }
  .tip-icon{
    width:44px;height:44px;border-radius:12px;flex-shrink:0;
    display:grid;place-items:center;
    background:linear-gradient(135deg,#EAF2FE,#E4F6F5);
    color:var(--brand);font-size:17px;
  }
  .tip-card h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:6px}
  .tip-card p{font-size:14.5px;color:var(--muted)}

  /* ---------- FAQ ---------- */
  .faq-layout{display:grid;gap:36px}
  @media (min-width:1024px){.faq-layout{grid-template-columns:.85fr 1.15fr;gap:56px}}
  .faq-aside p{color:var(--muted);font-size:15.5px;margin-top:14px}
  .faq-aside .btn{margin-top:24px}
  .faq-list{
    background:#fff;border:1px solid var(--line);
    border-radius:var(--r-card);box-shadow:var(--sh-1);
    overflow:hidden;
  }
  .faq-item + .faq-item{border-top:1px solid #EDF4FB}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:20px 22px;text-align:left;
    font-size:16px;font-weight:600;color:var(--ink);
    transition:background-color .2s ease;
  }
  .faq-q:hover{background:#F6FAFE}
  .faq-q i{color:var(--brand);font-size:14px;transition:transform .3s ease;flex-shrink:0}
  .faq-item.is-open .faq-q{background:#F6FAFE}
  .faq-item.is-open .faq-q i{transform:rotate(180deg)}
  .faq-a{
    max-height:0;overflow:hidden;
    transition:max-height .35s ease;
    background:#F6FAFE;
  }
  .faq-a div{padding:0 22px 22px;font-size:15px;color:var(--muted);line-height:1.85}

  /* ---------- CTA ---------- */
  .cta-band{
    background:linear-gradient(135deg,#1F6FE5,#1759BC);
    border-radius:var(--r-lg);
    padding:52px 32px;
    color:#fff;
    box-shadow:0 24px 60px rgba(23,89,188,.28);
    position:relative;
    overflow:hidden;
  }
  @media (min-width:768px){.cta-band{padding:64px 56px}}
  .cta-band::after{
    content:"";position:absolute;right:-80px;top:-80px;
    width:280px;height:280px;border-radius:50%;
    background:rgba(255,255,255,.10);
  }
  .cta-band h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.35}
  .cta-band p{margin-top:14px;font-size:15.5px;color:rgba(255,255,255,.86);max-width:640px}
  .cta-form{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;position:relative;z-index:2}
  .cta-form input{
    flex:1 1 260px;min-height:48px;
    border-radius:var(--r-btn);
    border:1px solid rgba(255,255,255,.45);
    background:rgba(255,255,255,.96);
    padding:0 16px;font-size:15px;color:var(--ink);
  }
  .cta-form input:focus{outline:none;border-color:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.35)}
  .cta-form .btn-primary{background:#0D1B2A;box-shadow:none}
  .cta-form .btn-primary:hover{background:#16283C}
  .cta-note{margin-top:16px;font-size:13px;color:rgba(255,255,255,.78);position:relative;z-index:2}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--ink);color:#a9bcd0;margin-top:12px}
  .footer-brand-name{font-size:16px;font-weight:700;color:#fff}
  .footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px}
  .footer-link{display:inline-block;font-size:14.5px;color:#a9bcd0;padding:4px 0}
  .footer-link:hover{color:#7FB3F5}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.12);
    margin-top:44px;padding-top:22px;
    font-size:13px;color:#8fa3b8;
  }
  .to-top{
    position:fixed;right:20px;bottom:24px;z-index:60;
    width:46px;height:46px;border-radius:14px;
    background:#fff;color:var(--brand);
    border:1px solid var(--line);
    box-shadow:var(--sh-2);
    display:grid;place-items:center;
    opacity:0;pointer-events:none;
    transition:opacity .25s ease,transform .2s ease;
  }
  .to-top.is-show{opacity:1;pointer-events:auto}
  .to-top:hover{transform:translateY(-2px)}

  @media (max-width:640px){
    .hero-stats{grid-template-columns:1fr;gap:14px}
    .hero-stats li{text-align:left;border-bottom:1px dashed var(--line);padding-bottom:12px}
    .hero-stats li:last-child{border-bottom:0;padding-bottom:0}
    .hero-cta .btn{width:100%}
    .brand-text{font-size:15.5px}
  }

/* roulang page: category2 */
:root{
    --blue:#1F6FE5;
    --blue-dark:#1559BD;
    --blue-soft:#E8F1FE;
    --ink:#0D1B2A;
    --muted:#52657A;
    --bg:#F7FAFD;
    --card:#FFFFFF;
    --border:#DCE7F5;
    --teal:#0EA5A4;
    --amber:#F2A93B;
    --danger:#D94A4A;
    --radius:16px;
    --radius-sm:12px;
    --radius-lg:24px;
    --shadow:0 8px 24px rgba(18,52,96,.08);
    --shadow-lg:0 16px 40px rgba(18,52,96,.12);
    --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:var(--font-cn);
    font-size:16.5px;
    line-height:1.8;
    color:var(--ink);
    background:var(--bg);
    -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;transition:color .2s ease,background-color .2s ease}
  img{max-width:100%;display:block}
  button{font-family:inherit;cursor:pointer;border:0;background:none}
  input{font-family:inherit;font-size:15.5px}
  a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid rgba(31,111,229,.45);outline-offset:2px;border-radius:8px}

  .container-x{width:100%;max-width:1280px;margin:0 auto;padding-left:20px;padding-right:20px}
  @media (min-width:768px){.container-x{padding-left:24px;padding-right:24px}}
  @media (min-width:1024px){.container-x{padding-left:32px;padding-right:32px}}

  /* ---------- 顶部玻璃导航 ---------- */
  .site-header{position:fixed;top:0;left:0;right:0;z-index:60}
  .nav-shell{
    background:rgba(255,255,255,.55);
    backdrop-filter:blur(16px) saturate(160%);
    -webkit-backdrop-filter:blur(16px) saturate(160%);
    border-bottom:1px solid rgba(255,255,255,.6);
    transition:background-color .28s ease,box-shadow .28s ease,border-color .28s ease;
  }
  .site-header.nav-scrolled .nav-shell{
    background:rgba(255,255,255,.94);
    border-bottom-color:var(--border);
    box-shadow:var(--shadow);
  }
  .nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:72px}
  .brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
  .brand-mark{
    width:34px;height:34px;border-radius:11px;
    background:linear-gradient(135deg,#2F86F6,#1559BD);
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 6px 16px rgba(21,89,189,.28);
  }
  .brand-mark span{width:13px;height:13px;border-radius:4px;background:#fff;box-shadow:inset 0 0 0 3px rgba(31,111,229,.85)}
  .brand-text{font-size:17px;font-weight:700;letter-spacing:.3px;color:var(--ink);white-space:nowrap}
  .nav-links{display:none;align-items:center;gap:4px}
  .nav-link{
    display:inline-flex;align-items:center;height:40px;padding:0 13px;border-radius:10px;
    font-size:15px;font-weight:500;color:#243B54;
  }
  .nav-link:hover{background:var(--blue-soft);color:var(--blue)}
  .nav-link.is-active{background:var(--blue-soft);color:var(--blue);font-weight:600}
  .nav-actions{display:flex;align-items:center;gap:10px}
  .icon-btn{
    width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
    color:#243B54;border:1px solid transparent;transition:.2s ease;
  }
  .icon-btn:hover{background:var(--blue-soft);color:var(--blue);border-color:#CFE2FA}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 20px;border-radius:var(--radius-sm);
    font-size:15px;font-weight:600;letter-spacing:.2px;
    transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease;
  }
  .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(31,111,229,.28)}
  .btn-primary:hover{background:var(--blue-dark);transform:translateY(-1px);box-shadow:0 14px 28px rgba(31,111,229,.32)}
  .btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(31,111,229,.26)}
  .btn-ghost{background:transparent;color:var(--ink);border:1px solid transparent}
  .btn-ghost:hover{background:var(--blue-soft);color:var(--blue)}
  .btn-outline{background:#fff;color:var(--ink);border:1px solid var(--border);box-shadow:var(--shadow)}
  .btn-outline:hover{border-color:#B9D3F3;background:#F4F9FF;color:var(--blue);transform:translateY(-1px)}
  .btn-light{background:rgba(255,255,255,.92);color:var(--blue);border:1px solid rgba(255,255,255,.7)}
  .btn-light:hover{background:#fff;transform:translateY(-1px)}
  .btn-block{width:100%}
  .hamburger{display:flex}
  .nav-search{display:none;align-items:center;gap:8px;background:#fff;border:1px solid var(--border);border-radius:12px;padding:0 12px;height:44px}
  .nav-search input{border:0;outline:none;width:132px;background:transparent;color:var(--ink)}
  .nav-search input::placeholder{color:#8DA0B5}

  @media (min-width:1024px){
    .nav-links{display:flex}
    .hamburger{display:none}
    .nav-search{display:flex}
  }
  @media (max-width:1023px){
    .brand-text{font-size:15.5px}
  }

  /* ---------- 移动抽屉 ---------- */
  .drawer{
    position:fixed;inset:0;z-index:80;
    background:rgba(13,27,42,.42);
    opacity:0;pointer-events:none;transition:opacity .26s ease;
  }
  .drawer.open{opacity:1;pointer-events:auto}
  .drawer-panel{
    position:absolute;top:0;right:0;height:100%;width:min(88vw,350px);
    background:rgba(255,255,255,.96);
    backdrop-filter:blur(16px) saturate(160%);
    -webkit-backdrop-filter:blur(16px) saturate(160%);
    border-left:1px solid var(--border);
    padding:22px 20px 28px;
    display:flex;flex-direction:column;gap:6px;
    transform:translateX(102%);transition:transform .3s cubic-bezier(.4,.2,.2,1);
    overflow-y:auto;
  }
  .drawer.open .drawer-panel{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
  .drawer-link{
    display:flex;align-items:center;min-height:52px;padding:0 14px;border-radius:12px;
    font-size:16px;font-weight:500;color:var(--ink);
  }
  .drawer-link:hover,.drawer-link.is-active{background:var(--blue-soft);color:var(--blue)}
  .drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--border)}

  /* ---------- Hero ---------- */
  .hero{
    position:relative;
    padding:132px 0 76px;
    overflow:hidden;
    background-color:#EAF2FC;
    background-image:linear-gradient(100deg,rgba(247,250,253,.96) 0%,rgba(240,246,253,.86) 42%,rgba(31,111,229,.22) 100%),
      url('/assets/images/backpic/back-2.webp');
    background-size:cover;
    background-position:center right;
  }
  .hero::after{
    content:"";
    position:absolute;inset:0;
    background-image:radial-gradient(rgba(31,111,229,.16) 1px,transparent 1px);
    background-size:26px 26px;
    opacity:.35;
    pointer-events:none;
  }
  .hero-inner{position:relative;z-index:2;display:grid;gap:44px;align-items:center}
  @media (min-width:1024px){
    .hero{padding:150px 0 96px}
    .hero-inner{grid-template-columns:1.08fr .92fr;gap:56px}
  }
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    padding:7px 14px;border-radius:999px;
    background:rgba(31,111,229,.12);color:var(--blue);
    font-size:13.5px;font-weight:600;letter-spacing:.4px;
  }
  .eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--teal)}
  .hero h1{
    margin-top:20px;
    font-size:clamp(30px,6.4vw,50px);
    line-height:1.22;font-weight:700;letter-spacing:-.4px;
  }
  .hero h1 .hl{color:var(--blue)}
  .hero-sub{margin-top:18px;font-size:17px;color:var(--muted);max-width:560px}
  .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
  .hero-stats{
    margin-top:34px;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;
    padding:18px 20px;border-radius:var(--radius);
    background:rgba(255,255,255,.72);
    border:1px solid rgba(255,255,255,.8);
    box-shadow:var(--shadow);
    backdrop-filter:blur(8px);
  }
  .stat-num{font-size:22px;font-weight:700;color:var(--blue);line-height:1.2}
  .stat-label{font-size:12.5px;color:var(--muted);margin-top:4px}

  .hero-media-card{
    position:relative;border-radius:var(--radius-lg);overflow:hidden;
    box-shadow:var(--shadow-lg);border:1px solid rgba(255,255,255,.7);
    background:#fff;
  }
  .hero-media-card img{width:100%;aspect-ratio:16/11;object-fit:cover}
  .hero-media-card::before{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(13,27,42,.06) 0%,rgba(13,27,42,.62) 100%);
  }
  .media-caption{
    position:absolute;left:0;right:0;bottom:0;padding:22px 22px 20px;color:#fff;
  }
  .media-caption h3{font-size:18px;font-weight:600}
  .media-caption p{margin-top:6px;font-size:13.5px;color:rgba(255,255,255,.82)}
  .play-btn{
    position:absolute;left:50%;top:42%;transform:translate(-50%,-50%);
    width:66px;height:66px;border-radius:50%;
    background:rgba(255,255,255,.92);
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 12px 30px rgba(13,27,42,.28);
    transition:transform .2s ease,background .2s ease;
  }
  .play-btn:hover{transform:translate(-50%,-50%) scale(1.06);background:#fff}
  .play-btn::after{
    content:"";margin-left:5px;
    width:0;height:0;border-left:16px solid var(--blue);
    border-top:10px solid transparent;border-bottom:10px solid transparent;
  }

  /* ---------- 面包屑 ---------- */
  .crumbs{
    padding:14px 0;
    background:#fff;
    border-bottom:1px solid var(--border);
    margin-top:72px;
  }
  .crumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted)}
  .crumb-list a{color:var(--muted)}
  .crumb-list a:hover{color:var(--blue)}
  .crumb-list .sep{color:#B7C7D8}
  .crumb-list .current{color:var(--ink);font-weight:600}

  /* ---------- 通用区块 ---------- */
  .section{padding:64px 0}
  @media (min-width:1024px){.section{padding:96px 0}}
  .section-head{max-width:760px}
  .section-tag{
    display:inline-block;padding:6px 13px;border-radius:999px;
    background:var(--blue-soft);color:var(--blue);
    font-size:13px;font-weight:600;letter-spacing:.4px;
  }
  .section-title{margin-top:16px;font-size:clamp(24px,3.2vw,34px);font-weight:700;line-height:1.3;letter-spacing:-.3px}
  .section-desc{margin-top:14px;color:var(--muted);font-size:16px}

  .card{
    background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
    box-shadow:var(--shadow);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  }
  .card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:#C7DCF7}

  /* ---------- 等级卡片网格 ---------- */
  .tier-grid{display:grid;gap:20px;margin-top:44px;grid-template-columns:1fr}
  @media (min-width:768px){.tier-grid{grid-template-columns:repeat(2,1fr);gap:24px}}
  .tier-card{padding:0;overflow:hidden;display:flex;flex-direction:column}
  .tier-cover{position:relative}
  .tier-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}
  .tier-badge{
    position:absolute;left:16px;top:16px;
    padding:6px 13px;border-radius:999px;
    background:rgba(255,255,255,.94);
    font-size:12.5px;font-weight:700;color:var(--blue);
    box-shadow:0 6px 16px rgba(13,27,42,.14);
  }
  .tier-badge.amber{color:#8A5A06;background:rgba(242,169,59,.95)}
  .tier-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
  .tier-name{font-size:19px;font-weight:700}
  .tier-note{margin-top:6px;font-size:13.5px;color:var(--muted)}
  .tier-list{margin-top:16px;display:grid;gap:10px}
  .tier-list li{display:flex;gap:10px;font-size:14.8px;color:#2C4258;line-height:1.7}
  .tick{
    flex-shrink:0;width:19px;height:19px;margin-top:5px;border-radius:50%;
    background:rgba(14,165,164,.14);color:var(--teal);
    display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;
  }
  .tier-foot{margin-top:22px;padding-top:18px;border-top:1px dashed var(--border);display:flex;align-items:center;justify-content:space-between;gap:12px}
  .price{font-size:15px;font-weight:700;color:var(--ink)}
  .price small{display:block;font-size:12px;font-weight:500;color:var(--muted);margin-top:2px}

  /* ---------- 时间线 ---------- */
  .timeline-wrap{display:grid;gap:36px;margin-top:44px}
  @media (min-width:1024px){.timeline-wrap{grid-template-columns:.82fr 1.18fr;gap:56px;align-items:start}}
  .timeline{position:relative;padding-left:38px}
  .timeline::before{
    content:"";position:absolute;left:13px;top:8px;bottom:8px;width:2px;border-radius:2px;
    background:linear-gradient(180deg,var(--blue) 0%,#8FBDF5 55%,rgba(31,111,229,.15) 100%);
  }
  .tl-item{position:relative;padding-bottom:30px}
  .tl-item:last-child{padding-bottom:0}
  .tl-dot{
    position:absolute;left:-38px;top:4px;
    width:28px;height:28px;border-radius:50%;
    background:#fff;border:2px solid var(--blue);
    display:flex;align-items:center;justify-content:center;
    font-size:12px;font-weight:700;color:var(--blue);
    box-shadow:0 4px 12px rgba(31,111,229,.18);
  }
  .tl-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow)}
  .tl-head{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
  .tl-title{font-size:17.5px;font-weight:700}
  .tl-tag{padding:4px 11px;border-radius:999px;font-size:12px;font-weight:600;background:var(--blue-soft);color:var(--blue)}
  .tl-card p{margin-top:10px;font-size:15px;color:var(--muted)}
  .bar{margin-top:16px;height:8px;border-radius:999px;background:#EDF4FE;overflow:hidden}
  .bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#5AA2F5,var(--blue))}
  .bar-label{display:flex;justify-content:space-between;font-size:12.5px;color:var(--muted);margin-top:8px}

  .aside-panel{
    background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
    padding:26px 24px;box-shadow:var(--shadow);
  }
  .aside-panel h3{font-size:18px;font-weight:700}
  .kv-list{margin-top:18px;display:grid;gap:14px}
  .kv-list li{display:flex;justify-content:space-between;gap:14px;font-size:14.5px;padding-bottom:14px;border-bottom:1px dashed var(--border)}
  .kv-list li:last-child{border-bottom:0;padding-bottom:0}
  .kv-list .k{color:var(--muted)}
  .kv-list .v{font-weight:600;text-align:right;color:var(--ink)}
  .aside-note{margin-top:20px;font-size:13px;color:var(--muted);line-height:1.75}

  /* ---------- 资源卡 ---------- */
  .res-grid{display:grid;gap:20px;margin-top:40px;grid-template-columns:1fr}
  @media (min-width:768px){.res-grid{grid-template-columns:repeat(2,1fr);gap:24px}}
  .res-card{overflow:hidden;display:flex;flex-direction:column}
  .res-card img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s ease}
  .res-card:hover img{transform:scale(1.03)}
  .res-cover{overflow:hidden}
  .res-body{padding:22px;display:flex;flex-direction:column;flex:1}
  .chip-row{display:flex;flex-wrap:wrap;gap:8px}
  .chip{
    display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;
    font-size:12px;font-weight:600;background:var(--blue-soft);color:var(--blue);
  }
  .chip.teal{background:rgba(14,165,164,.12);color:#0B7F7E}
  .chip.amber{background:rgba(242,169,59,.16);color:#8A5A06}
  .res-title{margin-top:14px;font-size:18px;font-weight:700;line-height:1.45}
  .res-text{margin-top:10px;font-size:14.8px;color:var(--muted);flex:1}
  .res-link{margin-top:18px;display:inline-flex;align-items:center;gap:7px;font-size:14.5px;font-weight:600;color:var(--blue)}
  .res-link::after{content:"→";transition:transform .2s ease}
  .res-link:hover::after{transform:translateX(4px)}

  /* ---------- 反馈摘录 ---------- */
  .quote-band{
    background:linear-gradient(135deg,#0E2A4C 0%,#123B6B 100%);
    border-radius:var(--radius-lg);
    padding:44px 26px;color:#fff;
    box-shadow:0 20px 50px rgba(13,27,42,.22);
    position:relative;overflow:hidden;
  }
  .quote-band::after{
    content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;
    background:radial-gradient(circle,rgba(31,111,229,.55),transparent 70%);
  }
  .quote-grid{position:relative;z-index:2;display:grid;gap:20px;margin-top:32px}
  @media (min-width:768px){.quote-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
  .quote-card{
    background:rgba(255,255,255,.08);
    border:1px solid rgba(255,255,255,.16);
    border-radius:var(--radius);padding:22px;
    backdrop-filter:blur(4px);
  }
  .quote-card p{font-size:15px;line-height:1.85;color:rgba(255,255,255,.92)}
  .quote-meta{margin-top:16px;display:flex;align-items:center;gap:10px;font-size:13px;color:rgba(255,255,255,.68)}
  .avatar{
    width:34px;height:34px;border-radius:50%;
    background:linear-gradient(135deg,#5AA2F5,#1559BD);
    display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:#fff;
  }
  .quote-band h2{font-size:clamp(22px,3vw,30px);font-weight:700;position:relative;z-index:2}
  .quote-band .lead{margin-top:12px;color:rgba(255,255,255,.75);font-size:15.5px;max-width:640px;position:relative;z-index:2}

  /* ---------- FAQ ---------- */
  .faq-wrap{display:grid;gap:32px;margin-top:40px}
  @media (min-width:1024px){.faq-wrap{grid-template-columns:.78fr 1.22fr;gap:56px;align-items:start}}
  .faq-list{display:grid;gap:12px}
  .faq-item{background:#fff;border:1px solid var(--border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);transition:border-color .2s ease}
  .faq-item.open{border-color:#B9D3F3}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    min-height:64px;padding:18px 22px;text-align:left;
    font-size:16.5px;font-weight:600;color:var(--ink);line-height:1.6;
  }
  .faq-q:hover{background:#F4F9FF}
  .faq-icon{
    flex-shrink:0;width:30px;height:30px;border-radius:10px;
    background:var(--blue-soft);color:var(--blue);
    display:flex;align-items:center;justify-content:center;
    font-size:17px;font-weight:600;line-height:1;
    transition:transform .28s ease,background .2s ease;
  }
  .faq-item.open .faq-icon{transform:rotate(45deg);background:var(--blue);color:#fff}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
  .faq-a-inner{padding:0 22px 20px;font-size:15.5px;color:var(--muted);line-height:1.85;background:#F9FBFE}
  .faq-item.open .faq-a-inner{padding-top:16px}

  /* ---------- CTA 表单 ---------- */
  .cta-panel{
    background:linear-gradient(135deg,#FFFFFF 0%,#EEF5FF 100%);
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    padding:34px 24px;
    box-shadow:var(--shadow-lg);
    display:grid;gap:30px;
    position:relative;overflow:hidden;
  }
  @media (min-width:1024px){
    .cta-panel{grid-template-columns:1.05fr .95fr;gap:48px;padding:52px 48px;align-items:center}
  }
  .cta-panel h2{font-size:clamp(24px,3.2vw,32px);font-weight:700;line-height:1.32}
  .cta-panel .desc{margin-top:14px;color:var(--muted);font-size:16px}
  .field{display:grid;gap:8px}
  .field label{font-size:13.5px;font-weight:600;color:#2C4258}
  .field input{
    width:100%;height:50px;padding:0 15px;border-radius:var(--radius-sm);
    border:1px solid var(--border);background:#fff;color:var(--ink);
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .field input::placeholder{color:#93A6BA}
  .field input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(31,111,229,.16)}
  .form-grid{display:grid;gap:16px}
  @media (min-width:640px){.form-grid{grid-template-columns:1fr 1fr}}
  .form-note{margin-top:14px;font-size:13px;color:var(--muted);line-height:1.7}
  .form-row{margin-top:20px;display:grid;gap:12px}
  @media (min-width:640px){.form-row{grid-template-columns:auto 1fr;align-items:center}}
  .tip-list{margin-top:22px;display:grid;gap:12px}
  .tip-list li{display:flex;gap:10px;font-size:14.8px;color:#2C4258}
  .tip-dot{flex-shrink:0;width:8px;height:8px;border-radius:50%;background:var(--blue);margin-top:10px}

  /* ---------- 页脚 ---------- */
  .site-footer{background:#0B1B2E;color:#cfe0f0;margin-top:0}
  .footer-brand-name{font-size:16.5px;font-weight:700;color:#fff}
  .footer-title{color:#fff;font-size:15px;font-weight:600;margin-bottom:14px}
  .footer-link{display:inline-flex;align-items:center;min-height:32px;font-size:14.5px;color:#A9BCD0;transition:color .2s ease}
  .footer-link:hover{color:#6FB0FF}
  .footer-bottom{
    margin-top:44px;padding-top:22px;
    border-top:1px solid rgba(255,255,255,.12);
    font-size:13px;color:#8FA3B8;
  }
  .back-top{
    position:fixed;right:18px;bottom:18px;z-index:70;
    width:46px;height:46px;border-radius:14px;
    background:rgba(255,255,255,.94);
    border:1px solid var(--border);
    box-shadow:var(--shadow);
    display:flex;align-items:center;justify-content:center;
    color:var(--blue);font-size:18px;font-weight:700;
    opacity:0;pointer-events:none;transform:translateY(10px);
    transition:opacity .25s ease,transform .25s ease,background .2s ease;
  }
  .back-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
  .back-top:hover{background:var(--blue);color:#fff;border-color:var(--blue)}
  @media (min-width:768px){.back-top{right:28px;bottom:28px}}