/* roulang page: index */
:root{
  --brand-700:#0E3C7E;
  --brand-600:#1758B0;
  --brand-500:#2A72D6;
  --brand-100:#E8F0FC;
  --brand-50:#F4F8FE;
  --teal:#12A594;
  --amber:#E8862A;
  --bg:#F7F9FC;
  --card:#FFFFFF;
  --surface:#EDF3FB;
  --border:#E2E9F2;
  --divider:#EDF1F7;
  --ink:#0E1B2C;
  --body:#47576B;
  --muted:#7C8CA0;
  --danger:#D64545;
  --radius:16px;
  --radius-sm:12px;
  --shadow-sm:0 1px 2px rgba(14,27,44,.05);
  --shadow-card:0 2px 4px rgba(14,27,44,.04),0 12px 28px rgba(14,27,44,.06);
  --shadow-lift:0 6px 12px rgba(14,27,44,.06),0 20px 40px rgba(23,88,176,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
::selection{background:var(--brand-100);color:var(--brand-700)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:16px;top:-80px;z-index:999;background:var(--brand-700);color:#fff;padding:10px 16px;border-radius:8px;transition:top .2s ease}
.skip-link:focus{top:12px}
a:focus-visible,button:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
svg{display:block}

/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--border);
  backdrop-filter:blur(12px);
  transition:box-shadow .18s ease,background .18s ease;
}
.site-header.scrolled{box-shadow:var(--shadow-sm);background:rgba(255,255,255,.99)}
.nav-wrap{display:flex;align-items:center;gap:30px;height:72px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;min-height:44px}
.logo svg{width:38px;height:38px;flex-shrink:0}
.logo-text strong{display:block;font-size:16px;line-height:1.2;color:var(--ink);letter-spacing:.2px}
.logo-text small{display:block;font-size:10px;letter-spacing:2px;color:var(--muted);line-height:1.5}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:10px}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--body);padding:8px 0;min-height:44px;display:inline-flex;align-items:center;transition:color .18s ease}
.nav-link::after{content:"";position:absolute;left:50%;bottom:3px;width:0;height:2px;border-radius:2px;background:var(--brand-600);transform:translateX(-50%);transition:width .18s ease}
.nav-link:hover{color:var(--brand-600)}
.nav-link.active{color:var(--brand-600);font-weight:600}
.nav-link.active::after{width:60%}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.menu-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border:1px solid var(--border);
  border-radius:10px;
  background:#fff;
  padding:0;
}
.menu-toggle span{position:relative;display:block;width:20px;height:2px;border-radius:2px;background:var(--ink);transition:background .18s ease}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:20px;height:2px;border-radius:2px;background:var(--ink);transition:transform .18s ease,top .18s ease}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
.menu-toggle[aria-expanded="true"] span{background:transparent}
.menu-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.menu-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}
.mobile-drawer{
  display:none;
  position:fixed;
  top:72px;left:0;right:0;bottom:0;
  z-index:99;
  background:#fff;
  padding:24px;
  overflow-y:auto;
  border-top:1px solid var(--border);
}
.mobile-drawer.open{display:block}
.drawer-links a{display:flex;align-items:center;min-height:56px;border-bottom:1px solid var(--divider);font-size:16px;font-weight:600;color:var(--ink)}
.drawer-links a.active{color:var(--brand-600)}
.drawer-cta{display:grid;gap:12px;margin-top:24px}
body.menu-open{overflow:hidden}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 24px;
  border-radius:10px;
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  text-align:center;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.btn svg{width:16px;height:16px;flex-shrink:0;transition:transform .18s ease}
.btn:hover svg{transform:translateX(2px)}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 1px 2px rgba(14,27,44,.08)}
.btn-primary:hover{background:var(--brand-500);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-lift)}
.btn-primary:active{background:var(--brand-700);transform:none;box-shadow:none}
.btn-secondary{background:#fff;border-color:#D8E3F2;color:var(--brand-600)}
.btn-secondary:hover{background:var(--brand-50);border-color:var(--brand-100);color:var(--brand-600)}
.btn-secondary:active{background:var(--brand-100)}
.btn-ghost{background:transparent;border-color:transparent;color:var(--brand-600);padding:0 14px}
.btn-ghost:hover{background:var(--brand-50);color:var(--brand-600)}
.btn-white{background:#fff;border-color:#fff;color:var(--brand-700)}
.btn-white:hover{background:#F2F6FC;border-color:#F2F6FC;color:var(--brand-700)}
.btn-lg{min-height:52px;padding:0 30px;font-size:16px;border-radius:12px}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn:disabled{background:#C3D3E6;color:#7C8CA0;border-color:#C3D3E6;box-shadow:none;cursor:not-allowed;transform:none}
.text-link{display:inline-flex;align-items:center;gap:6px;min-height:44px;color:var(--brand-600);font-size:14px;font-weight:600;transition:color .18s ease}
.text-link svg{width:16px;height:16px;transition:transform .18s ease}
.text-link:hover{color:var(--brand-700)}
.text-link:hover svg{transform:translateX(2px)}

/* Shared text */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:2px;color:var(--brand-600);text-transform:uppercase}
.eyebrow::before{content:"";width:20px;height:2px;border-radius:2px;background:var(--brand-500);display:inline-block}
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:12px;font-weight:600;line-height:1.3}
.badge-amber{background:var(--amber);color:#fff}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:40px}
.section-head h2{font-size:32px;line-height:1.3;color:var(--ink);font-weight:700;letter-spacing:-.2px;margin:8px 0 10px}
.section-head p{font-size:17px;line-height:1.8;color:var(--muted);max-width:660px}
.section-head .text-link{flex-shrink:0;margin-bottom:6px}

/* Hero */
.hero{position:relative;padding:72px 0 88px;background:linear-gradient(180deg,var(--brand-50) 0%,#fff 100%);overflow:hidden}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(circle,rgba(23,88,176,.10) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.35;
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:44px;line-height:1.22;letter-spacing:-.5px;color:var(--ink);font-weight:700;margin:14px 0 18px}
.hero-sub{font-size:18px;line-height:1.8;color:var(--body);max-width:580px}
.hero-buttons{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0 26px}
.trust-badges{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:13px;color:var(--muted)}
.trust-badges li{display:flex;align-items:center;gap:7px;min-height:28px}
.trust-badges svg{width:16px;height:16px;color:var(--teal);flex-shrink:0}
.hero-visual{position:relative}
.hero-visual img{width:100%;height:440px;object-fit:cover;border-radius:20px;border:1px solid rgba(255,255,255,.7);box-shadow:var(--shadow-card)}
.floating-card{
  position:absolute;
  left:-22px;
  bottom:26px;
  width:232px;
  display:flex;
  align-items:center;
  gap:12px;
  padding:16px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow-lift);
}
.status-dot{width:10px;height:10px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(18,165,148,.14);flex-shrink:0}
.floating-card strong{display:block;font-size:14px;color:var(--ink);line-height:1.4}
.floating-card small{display:block;font-size:12px;color:var(--muted);line-height:1.5;margin-top:2px}

/* Ladder */
.ladder{position:relative;padding-left:56px;max-width:920px}
.ladder::before{content:"";position:absolute;left:13px;top:14px;bottom:14px;width:3px;border-radius:3px;background:linear-gradient(180deg,var(--brand-500),var(--brand-100))}
.ladder-item{position:relative;margin-bottom:24px}
.ladder-item:last-child{margin-bottom:0}
.ladder-item:nth-child(2){margin-left:24px}
.ladder-item:nth-child(3){margin-left:48px}
.ladder-step{
  position:absolute;
  left:-56px;
  top:18px;
  width:28px;height:28px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-600);
  color:#fff;
  font-family:Inter,"PingFang SC",sans-serif;
  font-size:12px;font-weight:700;
  box-shadow:0 0 0 6px var(--brand-50);
}
.ladder-card{
  display:grid;
  grid-template-columns:48px 1fr auto;
  gap:18px;
  align-items:center;
  padding:20px 24px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.ladder-card:hover{border-color:var(--brand-100);box-shadow:var(--shadow-card);transform:translateY(-2px)}
.ladder-icon{width:48px;height:48px;border-radius:12px;display:grid;place-items:center;background:var(--brand-50);color:var(--brand-600)}
.ladder-icon svg{width:24px;height:24px}
.ladder-card h3{font-size:18px;line-height:1.5;color:var(--ink);font-weight:600}
.ladder-card p{font-size:14px;line-height:1.7;color:var(--muted);margin-top:4px}
.ladder-badge{display:inline-flex;align-items:center;justify-content:center;padding:6px 12px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:12px;font-weight:600;white-space:nowrap}
.ladder-badge.hot{background:rgba(232,134,42,.12);color:#A85A14}

/* Compare */
.compare-scroll{overflow-x:auto;border:1px solid var(--border);border-radius:20px;background:#fff;box-shadow:var(--shadow-card)}
.compare-table{width:100%;min-width:760px}
.compare-table th,.compare-table td{padding:16px 20px;text-align:left;font-size:15px;border-bottom:1px solid var(--divider);vertical-align:middle}
.compare-table thead th{background:var(--brand-50);border-bottom:1px solid var(--border)}
.compare-table thead th:first-child{width:200px;color:var(--muted);font-size:14px;font-weight:600}
.plan-name{display:block;font-size:18px;color:var(--ink);font-weight:700;line-height:1.4}
.plan-price{display:block;font-family:Inter,"PingFang SC",sans-serif;font-size:26px;font-weight:700;line-height:1.1;color:var(--brand-700);font-variant-numeric:tabular-nums;margin-top:4px}
.plan-price small{font-size:12px;color:var(--muted);font-weight:500;font-family:"PingFang SC",sans-serif}
.plan-note{display:block;font-size:12px;color:var(--muted);margin-top:4px}
.plan-badge{display:inline-flex;align-items:center;gap:4px;padding:3px 8px;border-radius:999px;background:var(--amber);color:#fff;font-size:11px;font-weight:700;margin-bottom:6px}
.compare-table tbody th{font-weight:500;color:var(--muted);background:#fff;font-size:14px}
.compare-table tbody td{color:var(--body)}
.recommend{background:var(--brand-50)!important}
.compare-table thead th.recommend{position:relative}
.compare-table tbody tr:hover td{background:#FAFCFF}
.compare-table tbody tr:hover td.recommend{background:var(--brand-50)!important}
.check-mark{display:inline-flex;align-items:center;gap:6px}
.check-mark svg{width:16px;height:16px;color:var(--teal);flex-shrink:0}
.plan-action-row th,.plan-action-row td{padding-top:20px;padding-bottom:20px}
.plan-cards{display:none}
.plan-card{padding:24px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm)}
.plan-card.recommended{background:var(--brand-50);border-color:var(--brand-500);box-shadow:var(--shadow-card)}
.plan-card h3{font-size:18px;color:var(--ink);margin:6px 0 4px}
.plan-card .plan-price{font-size:30px}
.plan-card ul{margin:16px 0 20px;display:grid;gap:8px}
.plan-card li{display:flex;align-items:flex-start;gap:8px;font-size:14px;color:var(--body);line-height:1.6}
.plan-card li svg{width:16px;height:16px;color:var(--teal);flex-shrink:0;margin-top:3px}

/* Limited */
.limited-wrap{padding:0 0 96px}
.limited-bar{
  position:relative;
  overflow:hidden;
  display:grid;
  grid-template-columns:1fr auto;
  gap:32px;
  align-items:center;
  padding:40px;
  border-radius:20px;
  background:var(--brand-600);
  color:#fff;
  box-shadow:var(--shadow-lift);
}
.limited-bar::before{
  content:"";
  position:absolute;
  right:-80px;top:-110px;
  width:420px;height:420px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.16),rgba(255,255,255,0) 68%);
  pointer-events:none;
}
.limited-bar::after{
  content:"";
  position:absolute;
  left:32%;bottom:-120px;
  width:360px;height:360px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.10),rgba(255,255,255,0) 66%);
  pointer-events:none;
}
.limited-content{position:relative;z-index:1}
.limited-content h2{font-size:28px;line-height:1.35;color:#fff;letter-spacing:-.2px}
.limited-content p{font-size:15px;line-height:1.8;color:rgba(255,255,255,.78);margin-top:8px;max-width:620px}
.countdown{display:flex;align-items:center;gap:8px;margin-top:22px;flex-wrap:wrap}
.countdown-label{font-size:13px;color:rgba(255,255,255,.72);margin-right:4px}
.count-box{
  width:56px;height:64px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  background:rgba(9,30,60,.55);
  border:1px solid rgba(255,255,255,.16);
  border-radius:12px;
  font-family:Inter,"PingFang SC",sans-serif;
  font-variant-numeric:tabular-nums;
}
.count-box strong{font-size:24px;line-height:1;color:#fff}
.count-box small{font-size:10px;line-height:1;color:rgba(255,255,255,.62);margin-top:5px;letter-spacing:1px}
.limited-action{position:relative;z-index:1;display:flex;align-items:center;gap:16px}
.limited-action .btn{white-space:nowrap}
.qr-card{
  width:120px;height:120px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:6px;
  border-radius:12px;
  background:#fff;
  border:1px solid rgba(255,255,255,.45);
  color:var(--brand-700);
  font-size:12px;
  font-weight:600;
  flex-shrink:0;
}
.qr-card svg{width:38px;height:38px;color:var(--brand-600)}

/* Category cards */
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cat-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;display:flex;flex-direction:column;transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}
.cat-card:hover{border-color:var(--brand-100);box-shadow:var(--shadow-card);transform:translateY(-2px)}
.cat-card img{width:100%;height:180px;object-fit:cover;background:var(--brand-50)}
.cat-body{padding:24px;display:flex;flex-direction:column;flex:1}
.cat-body h3{font-size:20px;line-height:1.5;color:var(--ink);margin:10px 0 8px}
.cat-body p{font-size:14.5px;line-height:1.8;color:var(--muted);flex-grow:1}
.cat-body .text-link{margin-top:14px;align-self:flex-start}

/* News */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;display:flex;flex-direction:column;transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}
.news-card:hover{border-color:var(--brand-100);box-shadow:var(--shadow-card);transform:translateY(-2px)}
.news-cover{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:var(--brand-50)}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}
.news-card:hover .news-cover img{transform:scale(1.03)}
.news-badge{position:absolute;left:12px;top:12px;display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;background:var(--brand-600);color:#fff;font-size:12px;font-weight:600;line-height:1.4;z-index:1}
.news-body{padding:20px;display:flex;flex-direction:column;flex:1}
.news-body h3{font-size:19px;line-height:1.5;color:var(--ink);font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:57px}
.news-body h3 a{transition:color .18s ease}
.news-body h3 a:hover{color:var(--brand-600)}
.news-body p{font-size:14px;line-height:1.75;color:var(--muted);margin-top:10px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;flex-grow:1}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px;padding-top:14px;border-top:1px solid var(--divider);font-size:13px;color:var(--muted)}
.news-meta a{color:var(--brand-600);font-weight:600;white-space:nowrap}
.empty-state{background:#fff;border:1px dashed var(--border);border-radius:var(--radius);padding:56px 24px;text-align:center;display:flex;flex-direction:column;align-items:center}
.empty-state svg{width:64px;height:64px;color:var(--brand-100);margin-bottom:16px}
.empty-state strong{display:block;font-size:18px;color:var(--ink);line-height:1.5}
.empty-state p{font-size:14px;color:var(--muted);line-height:1.8;margin-top:6px;max-width:480px}
.empty-state .btn{margin-top:20px}

/* Stats */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.stat-value{font-family:Inter,"PingFang SC",sans-serif;font-size:34px;line-height:1.1;font-weight:700;color:var(--brand-700);font-variant-numeric:tabular-nums}
.stat-label{font-size:14px;line-height:1.5;color:var(--ink);font-weight:600;margin-top:8px}
.stat-desc{font-size:13px;line-height:1.7;color:var(--muted);margin-top:4px}
.evidence-note{display:flex;align-items:flex-start;gap:12px;margin-top:24px;padding:20px 24px;background:var(--surface);border-radius:var(--radius-sm);font-size:14px;line-height:1.8;color:var(--body)}
.evidence-note svg{width:20px;height:20px;color:var(--brand-600);flex-shrink:0;margin-top:2px}

/* FAQ */
.faq-list{max-width:880px;margin:0 auto;background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden}
.faq-item{border-bottom:1px solid var(--divider)}
.faq-item:last-child{border-bottom:0}
.faq-question{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 24px;
  min-height:64px;
  background:transparent;
  border:0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  line-height:1.55;
  color:var(--ink);
  transition:background .18s ease;
}
.faq-question:hover{background:var(--brand-50)}
.faq-icon{position:relative;width:20px;height:20px;flex-shrink:0;color:var(--brand-600);transition:transform .18s ease}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:currentColor;border-radius:2px}
.faq-icon::before{left:9px;top:0;width:2px;height:20px}
.faq-icon::after{left:0;top:9px;width:20px;height:2px}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .25s ease}
.faq-item.open .faq-answer{max-height:420px}
.faq-answer-inner{padding:0 24px 24px;font-size:15px;line-height:1.85;color:var(--muted)}

/* Contact */
.contact-grid{display:grid;grid-template-columns:4fr 8fr;gap:40px;align-items:start}
.contact-info h2{font-size:30px;line-height:1.32;color:var(--ink);margin:8px 0 12px}
.contact-info > p{font-size:15px;line-height:1.8;color:var(--muted)}
.trust-list{margin-top:24px;display:grid;gap:14px}
.trust-list li{display:flex;align-items:flex-start;gap:10px;font-size:14px;line-height:1.7;color:var(--body)}
.trust-list svg{width:18px;height:18px;color:var(--teal);flex-shrink:0;margin-top:4px}
.contact-note{margin-top:24px;padding:16px 18px;background:var(--brand-50);border:1px solid var(--brand-100);border-radius:12px;font-size:13px;line-height:1.7;color:var(--brand-700)}
.form-card{background:#fff;border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow-card);padding:32px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:18px}
.field:last-child{margin-bottom:0}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:6px;line-height:1.5}
.input,select,textarea{width:100%;min-height:48px;padding:11px 16px;border:1px solid #D8E3F2;border-radius:10px;background:#fff;font-size:15px;line-height:1.6;color:var(--ink);transition:border-color .18s ease,box-shadow .18s ease}
textarea{min-height:120px;resize:vertical}
.input::placeholder,textarea::placeholder{color:#A9B6C6}
.input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(42,114,214,.14)}
select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237C8CA0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;padding-right:44px}
.field.error .input,.field.error select,.field.error textarea{border-color:var(--danger)}
.field.error .input:focus,.field.error select:focus,.field.error textarea:focus{box-shadow:0 0 0 3px rgba(214,69,69,.12)}
.error-msg{display:none;margin-top:6px;font-size:13px;line-height:1.5;color:var(--danger)}
.field.error .error-msg{display:block}
.field-check{margin:6px 0 20px}
.checkbox-row{display:flex;align-items:flex-start;gap:10px;font-size:13px;line-height:1.7;color:var(--muted)}
.checkbox-row input{width:18px;height:18px;margin-top:3px;accent-color:var(--brand-600);flex-shrink:0}
.checkbox-row label{cursor:pointer}
.field-check.error .checkbox-row{color:var(--danger)}
.form-success{display:none;text-align:center;padding:40px 20px}
.form-success.show{display:block}
.form-card.submitted form{display:none}
.form-card.submitted .form-success{display:block}
.success-icon{width:64px;height:64px;border-radius:50%;display:grid;place-items:center;margin:0 auto 18px;background:rgba(18,165,148,.12);color:var(--teal)}
.success-icon svg{width:32px;height:32px}
.form-success h3{font-size:22px;line-height:1.4;color:var(--ink)}
.form-success p{font-size:14px;line-height:1.8;color:var(--muted);margin:8px auto 20px;max-width:440px}

/* CTA band */
.cta-section{padding:0 0 96px}
.cta-band{
  position:relative;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:48px;
  border-radius:20px;
  background:linear-gradient(90deg,rgba(14,60,126,.95),rgba(23,88,176,.84)),url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color:#fff;
  box-shadow:var(--shadow-lift);
}
.cta-band h2{font-size:30px;line-height:1.35;color:#fff;letter-spacing:-.2px}
.cta-band p{font-size:15px;line-height:1.8;color:rgba(255,255,255,.8);margin-top:8px;max-width:620px}
.cta-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}

/* Footer */
.site-footer{background:var(--brand-700);color:#fff;padding:64px 0 32px;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1.1fr;gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-text strong{color:#fff}
.footer-brand .logo-text small{color:rgba(255,255,255,.6)}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:320px}
.footer-contact{margin-top:18px;display:grid;gap:8px;font-size:13px;line-height:1.7;color:rgba(255,255,255,.7)}
.footer-contact span{display:block}
.footer-contact a{color:rgba(255,255,255,.86)}
.footer-contact a:hover{color:#fff}
.footer-col h3{font-size:14px;line-height:1.5;font-weight:600;color:#fff;padding-bottom:12px;border-bottom:1px solid rgba(255,255,255,.18);margin-bottom:14px}
.footer-col a,.footer-col span.footer-text{display:block;font-size:14px;line-height:1.7;color:rgba(255,255,255,.72);padding:6px 0;transition:color .18s ease,transform .18s ease;min-height:32px}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-note{margin-top:14px;font-size:12px;line-height:1.7;color:rgba(255,255,255,.5)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.14);font-size:13px;line-height:1.7;color:rgba(255,255,255,.56)}
.footer-bottom a{color:rgba(255,255,255,.7)}
.footer-bottom a:hover{color:#fff}

/* Responsive */
@media (max-width:1023px){
  .section{padding:64px 0}
  .hero{padding:56px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:38px}
  .hero-visual img{height:380px}
  .main-nav{gap:18px}
  .nav-link{font-size:14px}
  .category-grid,.news-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr;gap:32px}
  .cta-band{padding:40px}
  .section-head h2{font-size:28px}
  .limited-bar{padding:32px}
}
@media (max-width:900px){
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .nav-actions .btn-ghost{display:none}
  .nav-wrap{gap:16px}
  .logo{margin-right:auto}
  .nav-actions{margin-left:0}
}
@media (max-width:767px){
  .section{padding:48px 0}
  .hero{padding:44px 0 56px}
  .hero h1{font-size:32px;letter-spacing:-.3px}
  .hero-sub{font-size:16px}
  .hero-visual img{height:300px}
  .floating-card{left:12px;bottom:16px;width:214px;padding:13px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px}
  .section-head h2{font-size:26px}
  .section-head p{font-size:15px}
  .section-head .text-link{margin-bottom:0}
  .ladder{padding-left:44px}
  .ladder::before{left:13px}
  .ladder-item:nth-child(2),.ladder-item:nth-child(3){margin-left:0}
  .ladder-step{left:-44px;box-shadow:0 0 0 5px var(--brand-50)}
  .ladder-card{grid-template-columns:40px 1fr;gap:14px;padding:18px}
  .ladder-icon{width:40px;height:40px}
  .ladder-badge{grid-column:2;justify-self:start}
  .compare-scroll{display:none}
  .plan-cards{display:grid;gap:16px}
  .limited-wrap{padding-bottom:64px}
  .limited-bar{grid-template-columns:1fr;padding:28px 22px;gap:24px}
  .limited-content h2{font-size:24px}
  .limited-action{flex-direction:column;align-items:flex-start;gap:14px}
  .limited-action .btn{width:100%}
  .qr-card{width:100%;height:68px;flex-direction:row;gap:10px}
  .category-grid,.news-grid,.stats-grid{grid-template-columns:1fr}
  .cat-card img{height:190px}
  .contact-info h2{font-size:26px}
  .form-card{padding:24px}
  .form-row{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px}
  .cta-band h2{font-size:24px}
  .cta-actions{width:100%;flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1/-1}
  .footer-desc{max-width:none}
  .footer-bottom{flex-direction:column;align-items:flex-start;margin-top:36px}
  .faq-question{padding:18px 20px;font-size:15px}
  .faq-answer-inner{padding:0 20px 20px;font-size:14px}
  .evidence-note{padding:18px}
  .count-box{width:50px;height:58px}
  .count-box strong{font-size:21px}
}
@media (max-width:519px){
  .container{padding:0 16px}
  .nav-wrap{height:68px;gap:10px}
  .mobile-drawer{top:68px;padding:18px}
  .logo svg{width:32px;height:32px}
  .logo-text strong{font-size:14px}
  .logo-text small{font-size:9px;letter-spacing:1px}
  .nav-actions .nav-cta{padding:0 11px;font-size:12px;min-height:40px;border-radius:9px}
  .nav-actions .nav-cta svg{width:14px;height:14px}
  .menu-toggle{width:40px;height:40px;border-radius:9px}
  .hero h1{font-size:27px}
  .hero-buttons{flex-direction:column;align-items:stretch}
  .hero-buttons .btn{width:100%}
  .hero-visual img{height:240px}
  .floating-card{position:relative;left:0;bottom:0;width:100%;margin-top:12px;box-shadow:var(--shadow-sm)}
  .btn-lg{width:100%;min-height:50px;padding:0 18px}
  .plan-card{padding:20px}
  .count-box{width:46px;height:54px}
  .count-box small{font-size:9px}
  .form-card{padding:20px}
  .stats-grid{gap:14px}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .cat-card img{height:170px}
  .news-body h3{min-height:0}
  .faq-question{padding:16px 18px;font-size:14px}
  .faq-answer-inner{padding:0 18px 18px}
  .cta-band{padding:28px 20px}
  .ladder{padding-left:38px}
  .ladder-step{left:-38px;width:26px;height:26px}
  .ladder::before{left:12px}
}

/* roulang page: category1 */
:root{
  --brand-700:#0E3C7E;
  --brand-600:#1758B0;
  --brand-500:#2A72D6;
  --brand-100:#E8F0FC;
  --brand-50:#F4F8FE;
  --teal:#12A594;
  --amber:#E8862A;
  --bg:#F7F9FC;
  --card:#FFFFFF;
  --surface:#EDF3FB;
  --border:#E2E9F2;
  --border-strong:#D8E3F2;
  --divider:#EDF1F7;
  --ink:#0E1B2C;
  --text:#47576B;
  --muted:#7C8CA0;
  --danger:#D64545;
  --radius-card:16px;
  --radius-lg:20px;
  --radius-btn:10px;
  --radius-input:10px;
  --shadow-sm:0 1px 2px rgba(14,27,44,.05);
  --shadow-card:0 2px 4px rgba(14,27,44,.04),0 12px 28px rgba(14,27,44,.06);
  --shadow-lift:0 6px 12px rgba(14,27,44,.06),0 20px 40px rgba(23,88,176,.12);
  --container:1200px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -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:var(--brand-600);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;}
a:hover{color:var(--brand-500);}
img{max-width:100%;display:block;border:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--ink);}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand-500);
  outline-offset:2px;
  border-radius:6px;
}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:#fff;
  border-bottom:1px solid var(--border);
  transition:height .18s ease,box-shadow .18s ease;
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:72px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo svg{
  width:36px;
  height:36px;
  border-radius:10px;
  background:var(--brand-600);
  box-shadow:var(--shadow-sm);
}
.logo-text{
  display:flex;
  flex-direction:column;
  line-height:1.15;
}
.logo-text strong{
  font-size:16px;
  color:var(--ink);
  letter-spacing:.2px;
  font-weight:700;
}
.logo-text small{
  font-size:10px;
  letter-spacing:1px;
  color:var(--muted);
  font-weight:500;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:44px;
  padding:0 14px;
  font-size:15px;
  font-weight:500;
  color:var(--text);
  border-radius:8px;
}
.nav-link:hover{
  color:var(--brand-600);
  background:var(--brand-50);
}
.nav-link.active{
  color:var(--brand-600);
  font-weight:600;
}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:6px;
  transform:translateX(-50%);
  width:60%;
  height:2px;
  border-radius:2px;
  background:var(--brand-600);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:24px;
}
.menu-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--border-strong);
  border-radius:10px;
  background:#fff;
  align-items:center;
  justify-content:center;
  padding:0;
}
.menu-toggle span{
  display:block;
  width:18px;
  height:2px;
  background:var(--brand-700);
  border-radius:2px;
  position:relative;
}
.menu-toggle span::before,
.menu-toggle span::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:var(--brand-700);
  border-radius:2px;
}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}

.mobile-drawer{
  display:none;
  border-top:1px solid var(--border);
  background:#fff;
  padding:12px 0 20px;
}
.mobile-drawer.open{display:block;}
.mobile-drawer .drawer-link{
  display:flex;
  align-items:center;
  min-height:56px;
  padding:0 24px;
  font-size:16px;
  font-weight:500;
  color:var(--text);
  border-bottom:1px solid var(--divider);
}
.mobile-drawer .drawer-link.active{
  color:var(--brand-600);
  font-weight:600;
  background:var(--brand-50);
}
.mobile-drawer .drawer-cta{
  margin:16px 24px 0;
  width:calc(100% - 48px);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 24px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  white-space:nowrap;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn .arrow{
  display:inline-block;
  transition:transform .18s ease;
}
.btn:hover .arrow{transform:translateX(3px);}
.btn-primary{
  background:var(--brand-600);
  color:#fff;
}
.btn-primary:hover{
  background:var(--brand-500);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:var(--shadow-lift);
}
.btn-primary:active{
  background:var(--brand-700);
  transform:none;
  box-shadow:none;
}
.btn-ghost{
  background:#fff;
  border-color:var(--border-strong);
  color:var(--brand-600);
}
.btn-ghost:hover{
  background:var(--brand-50);
  border-color:var(--brand-100);
  color:var(--brand-700);
}
.btn-ghost:active{
  background:var(--brand-100);
}
.btn-white{
  background:#fff;
  color:var(--brand-700);
}
.btn-white:hover{
  background:#F2F6FC;
  color:var(--brand-700);
  transform:translateY(-1px);
  box-shadow:var(--shadow-lift);
}
.btn-lg{
  height:52px;
  padding:0 30px;
  border-radius:12px;
  font-size:16px;
}
.btn-block{width:100%;}
.btn-text{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  color:var(--brand-600);
}
.btn-text .arrow{transition:transform .18s ease;}
.btn-text:hover .arrow{transform:translateX(3px);}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  background:#fff;
  border-bottom:1px solid var(--divider);
}
.breadcrumb-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:16px 0;
  font-size:14px;
  color:var(--muted);
}
.breadcrumb-inner a{color:var(--muted);}
.breadcrumb-inner a:hover{color:var(--brand-600);}
.breadcrumb-inner .sep{color:#C3CEDA;}
.breadcrumb-inner .current{color:var(--brand-600);font-weight:600;}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section.tight{padding:64px 0;}
.section.alt{background:#fff;}
.section-head{
  max-width:720px;
  margin-bottom:48px;
}
.eyebrow{
  display:inline-block;
  font-size:12px;
  font-weight:700;
  letter-spacing:2px;
  color:var(--brand-600);
  text-transform:uppercase;
  margin-bottom:14px;
}
.section-head h2{
  font-size:32px;
  line-height:1.3;
  margin-bottom:14px;
}
.section-head p{
  font-size:17px;
  line-height:1.8;
  color:var(--muted);
}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  background:linear-gradient(180deg,var(--brand-50) 0%,#FFFFFF 100%);
  padding:72px 0 88px;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(23,88,176,.10) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.28;
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
  align-items:center;
}
.hero-copy{grid-column:span 7;}
.hero-media{grid-column:span 5;}
.hero h1{
  font-size:44px;
  line-height:1.2;
  letter-spacing:-.5px;
  margin-bottom:20px;
}
.hero-lead{
  font-size:17px;
  line-height:1.85;
  color:var(--text);
  max-width:560px;
  margin-bottom:16px;
}
.hero-sub{
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
  max-width:560px;
  margin-bottom:32px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:36px;
}
.hero-badges{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.badge-item{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:40px;
  padding:0 16px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:999px;
  font-size:14px;
  font-weight:500;
  color:var(--text);
  box-shadow:var(--shadow-sm);
}
.badge-item .dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--teal);
}
.hero-figure{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--border);
  box-shadow:var(--shadow-card);
  background:var(--brand-50);
}
.hero-figure img{
  width:100%;
  height:420px;
  object-fit:cover;
}
.float-card{
  position:absolute;
  right:18px;
  bottom:18px;
  width:220px;
  background:#fff;
  border-radius:14px;
  border:1px solid var(--border);
  box-shadow:var(--shadow-lift);
  padding:16px;
}
.float-card .fc-label{
  font-size:12px;
  color:var(--muted);
  letter-spacing:1px;
  margin-bottom:6px;
}
.float-card .fc-value{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:700;
  color:var(--ink);
}
.float-card .fc-value .dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--teal);
}
.float-card .fc-note{
  font-size:12px;
  color:var(--muted);
  margin-top:8px;
  line-height:1.6;
}

/* ---------- 流程时间线 ---------- */
.timeline{
  position:relative;
  max-width:900px;
  margin:0 auto;
  padding-left:0;
}
.timeline::before{
  content:"";
  position:absolute;
  left:27px;
  top:16px;
  bottom:16px;
  width:2px;
  background:linear-gradient(180deg,var(--brand-500),var(--brand-100));
  border-radius:2px;
}
.step{
  position:relative;
  display:grid;
  grid-template-columns:56px 1fr;
  gap:24px;
  padding-bottom:36px;
}
.step:last-child{padding-bottom:0;}
.step-index{
  position:relative;
  z-index:1;
  width:56px;
  height:56px;
  border-radius:50%;
  background:var(--brand-600);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:var(--font-num);
  font-size:16px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
  box-shadow:0 0 0 6px #fff,var(--shadow-sm);
}
.step-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:24px;
  box-shadow:var(--shadow-sm);
  transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.step-card:hover{
  border-color:var(--brand-100);
  box-shadow:var(--shadow-card);
  transform:translateY(-2px);
}
.step-card h3{
  font-size:20px;
  margin-bottom:10px;
}
.step-card p{
  font-size:15px;
  line-height:1.85;
  color:var(--text);
}
.step-meta{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:14px;
}
.tag{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  background:var(--brand-50);
  color:var(--brand-700);
  font-size:12px;
  font-weight:600;
}
.tag.amber{
  background:rgba(232,134,42,.12);
  color:#B4650F;
}

/* ---------- 系统要求表 ---------- */
.spec-wrap{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
  align-items:start;
}
.spec-intro{grid-column:span 4;}
.spec-intro h2{
  font-size:32px;
  margin-bottom:16px;
}
.spec-intro p{
  font-size:16px;
  line-height:1.85;
  color:var(--muted);
  margin-bottom:20px;
}
.spec-intro .spec-note{
  display:flex;
  gap:12px;
  padding:18px;
  border-radius:14px;
  background:var(--brand-50);
  border:1px solid var(--brand-100);
  font-size:14px;
  line-height:1.8;
  color:var(--brand-700);
}
.spec-table{
  grid-column:span 8;
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
}
.spec-row{
  display:grid;
  grid-template-columns:200px 1fr;
  gap:24px;
  padding:18px 24px;
  border-bottom:1px solid var(--divider);
  transition:background-color .18s ease;
}
.spec-row:last-child{border-bottom:0;}
.spec-row:hover{background:var(--brand-50);}
.spec-key{
  font-size:14px;
  color:var(--muted);
  font-weight:600;
}
.spec-val{
  font-size:15px;
  color:var(--ink);
  font-weight:500;
}
.spec-val small{
  display:block;
  font-size:13px;
  color:var(--muted);
  font-weight:400;
  margin-top:2px;
}

/* ---------- 下载区 ---------- */
.download-band{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-lg);
  background:linear-gradient(135deg,var(--brand-700) 0%,var(--brand-600) 58%,#1E6ACB 100%);
  padding:48px 40px;
  color:#fff;
  box-shadow:var(--shadow-card);
}
.download-band::after{
  content:"";
  position:absolute;
  right:-80px;
  top:-80px;
  width:320px;
  height:320px;
  border-radius:50%;
  border:36px solid rgba(255,255,255,.06);
}
.download-inner{
  position:relative;
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:40px;
  align-items:center;
}
.download-copy h2{
  color:#fff;
  font-size:30px;
  margin-bottom:14px;
}
.download-copy p{
  color:rgba(255,255,255,.82);
  font-size:16px;
  line-height:1.85;
  max-width:520px;
}
.download-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:26px;
}
.download-side{
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.22);
  border-radius:16px;
  padding:24px;
}
.download-side h3{
  color:#fff;
  font-size:16px;
  margin-bottom:12px;
}
.download-side ul li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:14px;
  line-height:1.75;
  color:rgba(255,255,255,.85);
  padding:7px 0;
}
.download-side ul li::before{
  content:"";
  flex:0 0 auto;
  width:6px;
  height:6px;
  margin-top:9px;
  border-radius:50%;
  background:var(--teal);
}

/* ---------- 提示卡网格 ---------- */
.tips-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.tip-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:28px;
  box-shadow:var(--shadow-sm);
  transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.tip-card:hover{
  border-color:var(--brand-100);
  box-shadow:var(--shadow-card);
  transform:translateY(-2px);
}
.tip-icon{
  width:44px;
  height:44px;
  border-radius:12px;
  background:var(--brand-50);
  color:var(--brand-600);
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:18px;
}
.tip-icon svg{width:22px;height:22px;}
.tip-card h3{
  font-size:18px;
  margin-bottom:10px;
}
.tip-card p{
  font-size:15px;
  line-height:1.85;
  color:var(--text);
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq-list{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
}
.faq-item{border-bottom:1px solid var(--divider);}
.faq-item:last-child{border-bottom:0;}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:64px;
  padding:16px 24px;
  background:transparent;
  border:0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  transition:background-color .18s ease,color .18s ease;
}
.faq-q:hover{background:var(--brand-50);color:var(--brand-700);}
.faq-icon{
  flex:0 0 auto;
  position:relative;
  width:20px;
  height:20px;
  transition:transform .22s ease;
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  background:var(--brand-600);
  border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:14px;height:2px;}
.faq-icon::after{width:2px;height:14px;transition:opacity .22s ease;}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s ease;
}
.faq-a-inner{
  padding:0 24px 24px;
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
}
.faq-item.open .faq-a{max-height:420px;}

/* ---------- 咨询表单 ---------- */
.contact-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:32px;
  align-items:start;
}
.contact-copy{grid-column:span 4;}
.contact-copy h2{
  font-size:32px;
  margin-bottom:16px;
}
.contact-copy p{
  font-size:16px;
  line-height:1.85;
  color:var(--muted);
  margin-bottom:24px;
}
.trust-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:12px 0;
  font-size:15px;
  color:var(--text);
  border-top:1px solid var(--divider);
}
.trust-list li:first-child{border-top:0;}
.trust-list .ti{
  flex:0 0 auto;
  width:22px;
  height:22px;
  border-radius:50%;
  background:rgba(18,165,148,.12);
  color:var(--teal);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:12px;
  font-weight:700;
  margin-top:3px;
}
.form-card{
  grid-column:span 8;
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:32px;
  box-shadow:var(--shadow-card);
}
.form-row{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px;
}
.field{margin-bottom:18px;}
.field label{
  display:block;
  font-size:14px;
  font-weight:600;
  color:var(--ink);
  margin-bottom:6px;
}
.field input,
.field select,
.field textarea{
  width:100%;
  min-height:48px;
  padding:12px 16px;
  border:1px solid var(--border-strong);
  border-radius:var(--radius-input);
  background:#fff;
  color:var(--ink);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{min-height:118px;resize:vertical;line-height:1.75;}
.field input::placeholder,
.field textarea::placeholder{color:#A9B6C6;}
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(42,114,214,.14);
}
.field select{appearance:none;background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='8' viewBox='0 0 14 8'%3E%3Cpath fill='%237C8CA0' d='M7 8 0 0h14z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;background-size:12px 7px;padding-right:40px;}
.check-line{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:14px;
  color:var(--muted);
  line-height:1.7;
  margin-bottom:22px;
}
.check-line input{
  width:18px;
  height:18px;
  margin-top:3px;
  accent-color:var(--brand-600);
  flex:0 0 auto;
}
.form-submit{display:flex;justify-content:flex-end;}
.form-success{
  display:none;
  text-align:center;
  padding:28px 8px;
}
.form-success .ok{
  width:56px;
  height:56px;
  margin:0 auto 18px;
  border-radius:50%;
  background:rgba(18,165,148,.12);
  color:var(--teal);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:26px;
  font-weight:700;
}
.form-success h3{font-size:20px;margin-bottom:10px;}
.form-success p{font-size:15px;color:var(--muted);margin-bottom:20px;}

/* ---------- CTA 通栏 ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  background:var(--brand-600);
  border-radius:var(--radius-lg);
  padding:40px 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  color:#fff;
  box-shadow:var(--shadow-card);
}
.cta-band::before{
  content:"";
  position:absolute;
  left:-60px;
  bottom:-90px;
  width:260px;
  height:260px;
  border-radius:50%;
  border:32px solid rgba(255,255,255,.07);
}
.cta-band > *{position:relative;}
.cta-band h2{
  color:#fff;
  font-size:28px;
  margin-bottom:10px;
}
.cta-band p{
  color:rgba(255,255,255,.82);
  font-size:15px;
  line-height:1.8;
  max-width:600px;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--brand-700);
  color:#fff;
  padding:64px 0 32px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand .logo{margin-bottom:18px;}
.footer-brand .logo svg{background:rgba(255,255,255,.14);box-shadow:none;}
.footer-brand .logo-text strong{color:#fff;}
.footer-brand .logo-text small{color:rgba(255,255,255,.6);}
.footer-desc{
  font-size:14px;
  line-height:1.85;
  color:rgba(255,255,255,.72);
  max-width:340px;
  margin-bottom:18px;
}
.footer-contact span{
  display:block;
  font-size:13px;
  color:rgba(255,255,255,.68);
  line-height:1.9;
}
.footer-contact a{color:rgba(255,255,255,.85);}
.footer-contact a:hover{color:#fff;}
.footer-col h3{
  font-size:14px;
  font-weight:600;
  color:#fff;
  padding-bottom:12px;
  margin-bottom:12px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.footer-col a{
  display:block;
  font-size:14px;
  color:rgba(255,255,255,.72);
  padding:6px 0;
  transition:color .18s ease,transform .18s ease;
}
.footer-col a:hover{
  color:#fff;
  transform:translateX(2px);
}
.footer-text{
  display:block;
  font-size:14px;
  color:rgba(255,255,255,.72);
  padding:6px 0;
}
.footer-note{
  font-size:13px;
  line-height:1.8;
  color:rgba(255,255,255,.55);
  margin-top:10px;
}
.footer-bottom{
  margin-top:40px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(255,255,255,.6);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero h1{font-size:38px;}
}
@media (max-width:1023px){
  .main-nav{display:none;}
  .menu-toggle{display:inline-flex;}
  .header-actions{margin-left:auto;}
  .header-actions .btn-ghost{display:none;}
  .section{padding:64px 0;}
  .hero{padding:56px 0 64px;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-copy,.hero-media{grid-column:span 12;}
  .hero h1{font-size:34px;}
  .hero-figure img{height:340px;}
  .spec-wrap{grid-template-columns:1fr;}
  .spec-intro,.spec-table{grid-column:span 12;}
  .contact-grid{grid-template-columns:1fr;}
  .contact-copy,.form-card{grid-column:span 12;}
  .download-inner{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:48px 0;}
  .hero h1{font-size:30px;letter-spacing:-.2px;}
  .hero-lead{font-size:16px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-figure img{height:260px;}
  .float-card{position:static;width:100%;margin-top:14px;box-shadow:var(--shadow-sm);}
  .section-head h2,.spec-intro h2,.contact-copy h2{font-size:24px;}
  .download-copy h2{font-size:24px;}
  .cta-band h2{font-size:22px;}
  .cta-band{padding:32px 24px;}
  .tips-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .form-card{padding:24px;}
  .spec-row{grid-template-columns:1fr;gap:6px;padding:16px 20px;}
  .step{grid-template-columns:44px 1fr;gap:16px;}
  .step-index{width:44px;height:44px;font-size:14px;}
  .timeline::before{left:21px;}
  .faq-q{padding:14px 18px;font-size:15px;}
  .faq-a-inner{padding:0 18px 20px;}
  .form-submit .btn{width:100%;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .download-band{padding:32px 24px;}
}
@media (max-width:520px){
  .header-actions .btn-primary{padding:0 14px;font-size:14px;}
  .logo-text strong{font-size:15px;}
  .breadcrumb-inner{font-size:13px;}
  .footer-grid{grid-template-columns:1fr;}
}

/* roulang page: article */
:root {
  --brand-700: #0E3C7E;
  --brand-600: #1758B0;
  --brand-500: #2A72D6;
  --brand-100: #E8F0FC;
  --brand-50: #F4F8FE;
  --accent-teal: #12A594;
  --accent-amber: #E8862A;
  --bg: #F7F9FC;
  --surface: #FFFFFF;
  --surface-soft: #EDF3FB;
  --border: #E2E9F2;
  --border-strong: #D8E3F2;
  --divider: #EDF1F7;
  --ink: #0E1B2C;
  --text: #47576B;
  --muted: #7C8CA0;
  --white: #FFFFFF;
  --success: #12A594;
  --warning: #E8862A;
  --error: #D64545;
  --info: #2A72D6;
  --radius-card: 16px;
  --radius-large: 20px;
  --radius-sm: 12px;
  --radius-btn: 10px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(14, 27, 44, .05);
  --shadow-card: 0 2px 4px rgba(14, 27, 44, .04), 0 12px 28px rgba(14, 27, 44, .06);
  --shadow-lift: 0 6px 12px rgba(14, 27, 44, .06), 0 20px 40px rgba(23, 88, 176, .12);
  --container: 1200px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: light;
}
*,
*::before,
*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { padding: 0; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
::selection { background: var(--brand-100); color: var(--brand-700); }
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-500), var(--accent-teal));
  transition: width .08s linear;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  transition: box-shadow .2s ease, background .2s ease;
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }
.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 72px;
  padding-top: 0;
  padding-bottom: 0;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  min-height: 44px;
  border-radius: var(--radius-sm);
}
.logo:focus-visible { outline: 2px solid var(--brand-500); outline-offset: 3px; }
.logo-mark {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border-radius: 11px;
  box-shadow: 0 4px 10px rgba(23, 88, 176, .16);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-text strong {
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.2px;
}
.logo-text small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.6px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  min-width: 0;
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 12px;
  border-radius: 9px;
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-link:hover { background: var(--brand-50); color: var(--brand-600); }
.nav-link:focus-visible { outline: 2px solid var(--brand-500); outline-offset: 2px; }
.nav-link.active { color: var(--brand-600); }
.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 3px;
  left: 50%;
  width: 60%;
  height: 2px;
  border-radius: 2px;
  background: var(--brand-600);
  transform: translateX(-50%);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  flex: 0 0 auto;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 2px solid var(--brand-500); outline-offset: 2px; }
.btn:disabled,
.btn.is-loading {
  background: #C3D3E6;
  border-color: #C3D3E6;
  color: var(--muted);
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}
.btn-primary { background: var(--brand-600); color: var(--white); }
.btn-primary:hover { background: var(--brand-500); box-shadow: var(--shadow-lift); }
.btn-primary:active { background: var(--brand-700); }
.btn-secondary {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--brand-600);
}
.btn-secondary:hover { background: var(--brand-50); border-color: var(--brand-100); }
.btn-ghost { background: transparent; color: var(--brand-600); }
.btn-ghost:hover { background: var(--brand-50); }
.btn-white { background: var(--white); color: var(--brand-700); }
.btn-white:hover { background: #F2F6FC; box-shadow: var(--shadow-lift); }
.btn-outline-white {
  background: transparent;
  border-color: rgba(255, 255, 255, .42);
  color: var(--white);
}
.btn-outline-white:hover { background: rgba(255, 255, 255, .12); border-color: rgba(255, 255, 255, .7); }
.btn-sm { min-height: 38px; padding: 0 14px; font-size: 14px; }
.btn-nav { min-height: 44px; padding: 0 18px; }
.btn-full { width: 100%; }
.mobile-label { display: none; }
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink);
  transition: background .18s ease, border-color .18s ease;
}
.menu-toggle:hover { background: var(--brand-50); border-color: var(--brand-100); }
.menu-toggle:focus-visible { outline: 2px solid var(--brand-500); outline-offset: 2px; }
.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .2s ease, opacity .2s ease;
}
.menu-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.is-open span:nth-child(2) { opacity: 0; }
.menu-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-drawer {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  display: none;
  padding: 20px 24px 32px;
  background: var(--surface);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px);
  overflow-y: auto;
  transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
}
.mobile-drawer.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}
.mobile-nav { display: flex; flex-direction: column; }
.mobile-nav-link {
  display: flex;
  align-items: center;
  min-height: 56px;
  padding: 0 14px;
  border-bottom: 1px solid var(--divider);
  border-radius: 8px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
}
.mobile-nav-link:hover { background: var(--brand-50); color: var(--brand-600); }
.mobile-nav-link:focus-visible { outline: 2px solid var(--brand-500); outline-offset: 2px; }
.mobile-drawer-foot {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.mobile-drawer-foot p {
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.article-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 46px;
  background: linear-gradient(180deg, var(--brand-50) 0%, #FFFFFF 100%);
  border-bottom: 1px solid var(--border);
}
.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  opacity: .12;
  pointer-events: none;
}
.article-hero .container { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}
.breadcrumb a { color: var(--muted); transition: color .18s ease; }
.breadcrumb a:hover { color: var(--brand-600); }
.breadcrumb .sep { color: #A9B6C6; }
.crumb-category { color: var(--text); }
.crumb-current {
  max-width: 48vw;
  color: var(--brand-600);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.article-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  align-items: center;
}
.article-heading { min-width: 0; }
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 3px 11px;
  border-radius: var(--radius-pill);
  background: var(--brand-50);
  color: var(--brand-700);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.5;
}
.badge-soft { background: var(--brand-50); color: var(--brand-700); }
.badge-light { background: rgba(255, 255, 255, .16); color: var(--white); }
.article-heading h1 {
  margin-top: 16px;
  max-width: 820px;
  color: var(--ink);
  font-size: clamp(30px, 3.8vw, 40px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.5px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.article-meta time { font-variant-numeric: tabular-nums; }
.dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #A9B6C6;
}
.article-hero-art {
  overflow: hidden;
  border: 1px solid rgba(226, 233, 242, .9);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-lift);
  background: var(--surface);
}
.article-hero-art img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.article-section { padding: 48px 0 0; }
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) 280px;
  gap: 64px;
  align-items: start;
  justify-content: center;
}
.article-paper {
  min-width: 0;
  padding: 40px 44px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-card);
}
.post-content {
  color: var(--text);
  font-size: 16px;
  line-height: 1.9;
  overflow-wrap: anywhere;
}
.post-content p { margin-bottom: 20px; }
.post-content p:last-child { margin-bottom: 0; }
.post-content h2,
.post-content h3 { scroll-margin-top: 96px; color: var(--ink); }
.post-content h2 {
  margin: 40px 0 16px;
  padding-left: 16px;
  border-left: 4px solid var(--brand-500);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.45;
}
.post-content h3 {
  margin: 28px 0 12px;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.5;
}
.post-content h2:first-child,
.post-content h3:first-child { margin-top: 0; }
.post-content ul { margin: 0 0 20px; padding-left: 0; list-style: none; }
.post-content ul li {
  position: relative;
  padding-left: 22px;
  margin-top: 8px;
}
.post-content ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: .72em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-500);
}
.post-content ol { margin: 0 0 20px; padding-left: 24px; }
.post-content ol li { margin-top: 8px; padding-left: 4px; }
.post-content li > ul,
.post-content li > ol { margin-top: 8px; margin-bottom: 0; }
.post-content blockquote {
  margin: 24px 0;
  padding: 20px 24px;
  border-left: 3px solid var(--brand-500);
  border-radius: 0 12px 12px 0;
  background: var(--brand-50);
  color: var(--text);
  font-size: 16px;
}
.post-content blockquote p:last-child { margin-bottom: 0; }
.post-content a {
  color: var(--brand-600);
  border-bottom: 1px dashed var(--brand-500);
  transition: border-color .18s ease, color .18s ease;
}
.post-content a:hover { color: var(--brand-700); border-bottom-style: solid; }
.post-content img {
  width: 100%;
  margin: 24px 0 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
}
.post-content figure { margin: 24px 0; }
.post-content figure img { margin: 0 0 8px; }
.post-content figcaption {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  text-align: center;
}
.post-content table {
  display: block;
  width: 100%;
  margin: 24px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  border-collapse: collapse;
  overflow-x: auto;
  font-size: 15px;
}
.post-content th,
.post-content td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.post-content th {
  background: var(--brand-50);
  color: var(--ink);
  font-weight: 600;
}
.post-content tr:last-child td { border-bottom: 0; }
.post-content pre {
  margin: 24px 0;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--brand-50);
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.7;
  white-space: pre-wrap;
}
.post-content iframe { max-width: 100%; border-radius: var(--radius-sm); }
.article-sidebar { min-width: 0; }
.toc-card {
  position: sticky;
  top: 96px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
}
.toc-card h3 {
  margin-bottom: 14px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}
.toc-list { display: flex; flex-direction: column; gap: 3px; }
.toc-link {
  display: block;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  border-radius: 0 7px 7px 0;
  color: var(--text);
  font-size: 14px;
  line-height: 1.55;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.toc-link:hover { background: var(--brand-50); color: var(--brand-600); }
.toc-link.is-active {
  border-left-color: var(--brand-500);
  background: var(--brand-50);
  color: var(--brand-600);
}
.toc-link.toc-sub { padding-left: 22px; color: var(--muted); font-size: 13px; }
.toc-empty { display: block; padding: 8px 0; color: var(--muted); font-size: 13px; }
.side-cta-card {
  margin-top: 24px;
  padding: 24px;
  border-radius: var(--radius-large);
  background: var(--brand-600);
  color: var(--white);
  box-shadow: var(--shadow-lift);
  overflow: hidden;
}
.side-cta-card h3 {
  margin-top: 12px;
  color: var(--white);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.45;
}
.side-cta-card p {
  margin: 10px 0 16px;
  color: rgba(255, 255, 255, .8);
  font-size: 14px;
  line-height: 1.8;
}
.side-cta-card img {
  width: 100%;
  height: 142px;
  margin-bottom: 16px;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: var(--radius-sm);
  object-fit: cover;
}
.article-empty {
  max-width: 680px;
  margin: 0 auto;
  padding: 64px 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-card);
  text-align: center;
}
.empty-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--brand-50);
  color: var(--brand-600);
}
.article-empty h2 {
  color: var(--ink);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.4;
}
.article-empty p {
  margin: 12px auto 24px;
  max-width: 460px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}
.post-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1104px;
  margin: 40px auto 0;
  padding: 20px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
}
.tag-row { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.tag-label { color: var(--muted); font-size: 13px; font-weight: 600; }
.chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 3px 11px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  line-height: 1.5;
  transition: background .18s ease, border-color .18s ease, color .18s ease;
}
a.chip:hover { background: var(--brand-50); border-color: var(--brand-100); color: var(--brand-600); }
.post-nav-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.related-block { max-width: 1104px; margin: 64px auto 0; }
.section-head { margin-bottom: 24px; }
.eyebrow {
  display: inline-block;
  color: var(--brand-600);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 2px;
}
.eyebrow-light { color: rgba(255, 255, 255, .72); }
.section-head h2 {
  margin-top: 6px;
  color: var(--ink);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.3px;
}
.section-head p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}
.section-head-center { max-width: 760px; margin-left: auto; margin-right: auto; text-align: center; }
.related-single { max-width: 900px; }
.related-card {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-card);
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.related-card:hover {
  border-color: var(--brand-100);
  box-shadow: var(--shadow-lift);
  transform: translateY(-2px);
}
.related-media { min-height: 220px; background: var(--brand-50); overflow: hidden; }
.related-media img { width: 100%; height: 100%; min-height: 220px; object-fit: cover; }
.related-body { padding: 28px 30px; }
.related-body h3 {
  margin-top: 12px;
  color: var(--ink);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.45;
}
.related-body p {
  margin-top: 10px;
  color: var(--text);
  font-size: 15px;
  line-height: 1.8;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  color: var(--brand-600);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
}
.text-link svg { transition: transform .18s ease; }
.text-link:hover svg { transform: translateX(3px); }
.text-link:focus-visible { outline: 2px solid var(--brand-500); outline-offset: 3px; border-radius: 4px; }
.article-faq-section { padding: 64px 0 0; }
.faq-list {
  max-width: 880px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.faq-item + .faq-item { border-top: 1px solid var(--divider); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  min-height: 64px;
  padding: 18px 24px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  text-align: left;
  transition: background .18s ease, color .18s ease;
}
.faq-question:hover { background: var(--brand-50); color: var(--brand-600); }
.faq-question:focus-visible { outline: 2px solid var(--brand-500); outline-offset: -2px; }
.faq-icon {
  flex: 0 0 auto;
  color: var(--brand-600);
  transition: transform .2s ease;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .28s ease;
}
.faq-answer p {
  padding: 0 24px 24px;
  color: var(--text);
  font-size: 15px;
  line-height: 1.85;
}
.faq-item.open .faq-answer { max-height: 260px; }
.cta-band {
  position: relative;
  overflow: hidden;
  margin-top: 64px;
  padding: 64px 0;
  background: var(--brand-700);
  color: var(--white);
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  opacity: .16;
  pointer-events: none;
}
.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.cta-copy { max-width: 680px; }
.cta-copy h2 {
  margin-top: 8px;
  color: var(--white);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.3px;
}
.cta-copy p {
  margin-top: 12px;
  color: rgba(255, 255, 255, .8);
  font-size: 16px;
  line-height: 1.8;
}
.cta-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; flex: 0 0 auto; }
.site-footer {
  padding: 64px 0 32px;
  background: var(--brand-700);
  color: var(--white);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.footer-brand .logo { margin-bottom: 18px; }
.footer-brand .logo-text strong { color: var(--white); }
.footer-brand .logo-text small { color: rgba(255, 255, 255, .6); }
.footer-brand .logo-mark { box-shadow: none; }
.footer-desc {
  max-width: 380px;
  color: rgba(255, 255, 255, .72);
  font-size: 14px;
  line-height: 1.8;
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-top: 18px;
  color: rgba(255, 255, 255, .66);
  font-size: 13px;
  line-height: 1.7;
}
.footer-contact a { color: rgba(255, 255, 255, .78); border-bottom: 1px solid rgba(255, 255, 255, .28); }
.footer-contact a:hover { color: var(--white); border-bottom-color: rgba(255, 255, 255, .7); }
.footer-col h3 {
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, .14);
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: .3px;
}
.footer-col a {
  display: block;
  padding: 7px 0;
  color: rgba(255, 255, 255, .72);
  font-size: 14px;
  line-height: 1.6;
  transition: color .18s ease, transform .18s ease;
}
.footer-col a:hover { color: var(--white); transform: translateX(2px); }
.footer-col a:focus-visible { outline: 2px solid rgba(255, 255, 255, .72); outline-offset: 2px; border-radius: 4px; }
.footer-text {
  display: block;
  padding: 7px 0;
  color: rgba(255, 255, 255, .66);
  font-size: 14px;
  line-height: 1.7;
}
.footer-note {
  margin-top: 12px;
  color: rgba(255, 255, 255, .48);
  font-size: 12px;
  line-height: 1.7;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, .14);
  color: rgba(255, 255, 255, .54);
  font-size: 12px;
  line-height: 1.7;
}
.form-control {
  width: 100%;
  min-height: 48px;
  padding: 0 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-btn);
  background: var(--surface);
  color: var(--ink);
  font-size: 15px;
  outline: none;
  transition: border-color .18s ease, box-shadow .18s ease;
}
.form-control::placeholder { color: #A9B6C6; }
.form-control:focus { border-color: var(--brand-500); box-shadow: 0 0 0 3px rgba(42, 114, 214, .14); }
.divider { height: 1px; background: var(--divider); border: 0; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
@media (max-width: 1024px) {
  .header-ghost { display: none; }
  .article-layout { grid-template-columns: minmax(0, 1fr); }
  .article-sidebar { display: none; }
  .article-paper { max-width: 760px; margin: 0 auto; }
  .post-footer { max-width: 760px; }
  .related-block { max-width: 760px; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 900px) {
  .main-nav { display: none; }
  .menu-toggle { display: inline-flex; }
  .mobile-drawer { display: block; }
  .header-inner { gap: 16px; }
  .article-hero-inner { grid-template-columns: minmax(0, 1fr) 260px; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .article-hero { padding: 28px 0 36px; }
  .article-hero-inner { grid-template-columns: 1fr; gap: 0; }
  .article-hero-art { display: none; }
  .article-heading h1 { font-size: 30px; line-height: 1.35; }
  .crumb-current { max-width: 70vw; }
  .article-section { padding: 32px 0 0; }
  .article-paper { padding: 28px 22px; border-radius: var(--radius-card); }
  .post-content { font-size: 15px; line-height: 1.85; }
  .post-content h2 { font-size: 22px; margin-top: 34px; }
  .post-content h3 { font-size: 18px; }
  .post-footer { flex-direction: column; align-items: flex-start; margin-top: 32px; }
  .post-nav-actions { width: 100%; }
  .related-block { margin-top: 48px; }
  .related-card { grid-template-columns: 1fr; }
  .related-media { min-height: 0; }
  .related-media img { height: 210px; min-height: 0; }
  .related-body { padding: 22px; }
  .section-head h2 { font-size: 24px; }
  .section-head p { font-size: 15px; }
  .article-faq-section { padding: 48px 0 0; }
  .faq-question { padding: 16px 18px; font-size: 15px; }
  .faq-answer p { padding: 0 18px 20px; }
  .cta-band { margin-top: 48px; padding: 48px 0; }
  .cta-inner { flex-direction: column; align-items: flex-start; gap: 24px; }
  .cta-copy h2 { font-size: 24px; }
  .cta-copy p { font-size: 15px; }
  .cta-actions { width: 100%; }
  .cta-actions .btn { flex: 1 1 180px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
}
@media (max-width: 640px) {
  .header-inner { min-height: 64px; }
  .logo-mark { width: 34px; height: 34px; }
  .logo-text strong { font-size: 15px; }
  .logo-text small { font-size: 9px; letter-spacing: 1.4px; }
  .mobile-drawer { top: 64px; }
  .btn-nav { padding: 0 14px; }
  .desktop-label { display: none; }
  .mobile-label { display: inline; }
  .article-heading h1 { font-size: 28px; }
  .article-meta { gap: 6px; font-size: 12px; }
  .breadcrumb { margin-bottom: 18px; font-size: 13px; }
  .article-paper { padding: 24px 18px; }
  .post-content { font-size: 15px; }
  .post-content h2 { font-size: 21px; padding-left: 12px; border-left-width: 3px; }
  .post-content h3 { font-size: 17px; }
  .post-content blockquote { padding: 16px 18px; }
  .related-body h3 { font-size: 19px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .footer-col h3 { margin-top: 4px; }
  .cta-actions .btn { width: 100%; flex: 1 1 auto; }
  .article-empty { padding: 48px 20px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .header-actions { gap: 8px; }
  .btn { padding: 0 16px; font-size: 14px; }
  .btn-nav { min-height: 42px; }
  .menu-toggle { width: 42px; height: 42px; }
  .article-heading h1 { font-size: 26px; }
  .article-hero { padding: 24px 0 32px; }
  .post-footer { padding: 18px; }
  .tag-row { gap: 6px; }
  .post-nav-actions { flex-direction: column; align-items: stretch; }
  .post-nav-actions .btn { width: 100%; }
  .faq-question { font-size: 14px; }
  .footer-bottom { font-size: 11px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

/* roulang page: category2 */
:root{
  --brand-700:#0E3C7E;
  --brand-600:#1758B0;
  --brand-500:#2A72D6;
  --brand-100:#E8F0FC;
  --brand-50:#F4F8FE;
  --teal:#12A594;
  --amber:#E8862A;
  --bg:#F7F9FC;
  --card:#FFFFFF;
  --surface:#EDF3FB;
  --line:#E2E9F2;
  --divider:#EDF1F7;
  --ink:#0E1B2C;
  --text:#47576B;
  --muted:#7C8CA0;
  --err:#D64545;
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(14,27,44,.05);
  --shadow-card:0 2px 4px rgba(14,27,44,.04),0 12px 28px rgba(14,27,44,.06);
  --shadow-lift:0 6px 12px rgba(14,27,44,.06),0 20px 40px rgba(23,88,176,.12);
  --ease:.18s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
img{display:block;max-width:100%;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ===== 头部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-sm)}
.header-inner{
  display:flex;align-items:center;gap:32px;
  height:72px;
}
.site-header.is-scrolled .header-inner{height:64px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo svg{width:36px;height:36px;flex:0 0 auto}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.5px}
.logo-text small{font-size:10px;letter-spacing:2px;color:var(--brand-600);font-weight:600}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  min-height:44px;padding:0 12px;
  font-size:15px;font-weight:500;color:var(--text);
  border-radius:8px;
  transition:color var(--ease),background var(--ease);
}
.nav-link:hover{color:var(--brand-600);background:var(--brand-50)}
.nav-link.active{color:var(--brand-600);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:50%;bottom:6px;transform:translateX(-50%);
  width:60%;height:2px;border-radius:2px;background:var(--brand-600);
}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
  cursor:pointer;
  text-align:center;
}
.btn svg{width:16px;height:16px;flex:0 0 auto;transition:transform var(--ease)}
.btn:hover svg.arrow{transform:translateX(2px)}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--brand-500);transform:translateY(-1px);box-shadow:var(--shadow-lift)}
.btn-primary:active{background:var(--brand-700);transform:translateY(0);box-shadow:none}
.btn-primary:disabled{background:#C3D3E6;color:#7C8CA0;box-shadow:none;cursor:not-allowed;transform:none}
.btn-ghost{background:#fff;color:var(--brand-600);border-color:#D8E3F2}
.btn-ghost:hover{background:var(--brand-50);border-color:var(--brand-100)}
.btn-ghost:active{background:var(--brand-100)}
.btn-light{background:#fff;color:var(--brand-700);box-shadow:var(--shadow-sm)}
.btn-light:hover{background:#F2F6FC;transform:translateY(-1px);box-shadow:var(--shadow-lift)}
.btn-lg{min-height:52px;padding:0 28px;border-radius:12px;font-size:16px}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:10px;border:1px solid #D8E3F2;background:#fff;
}
.nav-toggle span{display:block;position:relative;width:18px;height:2px;background:var(--ink);border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
  transition:transform var(--ease);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle:hover{background:var(--brand-50);border-color:var(--brand-100)}
.mobile-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
  padding:16px 24px 28px;
}
.mobile-drawer.open{display:block}
.mobile-drawer a{
  display:flex;align-items:center;min-height:56px;
  font-size:16px;font-weight:500;color:var(--ink);
  border-bottom:1px solid var(--divider);
}
.mobile-drawer a.active{color:var(--brand-600);font-weight:600}
.mobile-drawer .btn{width:100%;margin-top:20px;min-height:48px}

/* ===== 面包屑 ===== */
.crumbs{padding:20px 0 0;font-size:14px;color:var(--muted)}
.crumbs ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:#C3CFDE}
.crumbs a:hover{color:var(--brand-600)}
.crumbs .current{color:var(--brand-600);font-weight:600}

/* ===== 通用板块 ===== */
.section{padding:96px 0}
.section.tight{padding:64px 0}
.section-head{max-width:760px;margin:0 auto 48px;text-align:center}
.section-head.left{margin-left:0;text-align:left}
.eyebrow{
  display:inline-block;margin-bottom:14px;
  font-size:12px;font-weight:700;letter-spacing:2px;color:var(--brand-600);
}
.section-head h2{font-size:32px;line-height:1.3;font-weight:700;color:var(--ink);letter-spacing:-.3px}
.section-head p{margin-top:14px;font-size:17px;line-height:1.8;color:var(--muted)}

/* ===== Hero ===== */
.hero{padding:56px 0 24px}
.hero-inner{
  max-width:760px;margin:0 auto;text-align:center;
  padding:56px 40px;
  background:
    radial-gradient(circle at 50% 0%, rgba(42,114,214,.10), rgba(42,114,214,0) 62%),
    linear-gradient(180deg,var(--brand-50) 0%, #FFFFFF 100%);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
}
.hero h1{
  font-size:44px;line-height:1.2;font-weight:700;color:var(--ink);letter-spacing:-.5px;
}
.hero h1 em{font-style:normal;color:var(--brand-600)}
.hero-lead{margin-top:20px;font-size:17px;line-height:1.85;color:var(--text)}
.hero-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:32px}
.hero-badges{
  display:flex;flex-wrap:wrap;justify-content:center;gap:10px 24px;
  margin-top:32px;padding-top:26px;border-top:1px solid var(--divider);
}
.hero-badges li{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text)}
.hero-badges svg{width:16px;height:16px;color:var(--teal);flex:0 0 auto}

/* ===== 交替图文 ===== */
.zigzag{
  display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center;
  margin-top:64px;
}
.zigzag:first-of-type{margin-top:0}
.zigzag .media{grid-column:span 6}
.zigzag .body{grid-column:span 6}
.zigzag.reverse .media{order:2}
.zigzag .media figure{
  border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  background:var(--brand-50);
}
.zigzag .media img{width:100%;height:340px;object-fit:cover}
.zigzag .body h2{font-size:30px;line-height:1.3;font-weight:700;color:var(--ink);letter-spacing:-.2px}
.zigzag .body p{margin-top:16px;font-size:16px;line-height:1.85}
.zigzag .body .tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  font-size:13px;font-weight:600;
  background:var(--brand-50);color:var(--brand-700);
  border:1px solid var(--brand-100);
}
.tag.teal{background:rgba(18,165,148,.10);color:#0B7F73;border-color:rgba(18,165,148,.22)}
.tag.amber{background:rgba(232,134,42,.12);color:#B4631A;border-color:rgba(232,134,42,.26)}

/* ===== 提示卡网格 ===== */
.tip-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.tip-card{
  position:relative;
  padding:28px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.tip-card:hover{border-color:var(--brand-100);box-shadow:var(--shadow-card);transform:translateY(-2px)}
.tip-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:var(--brand-50);color:var(--brand-600);
  margin-bottom:18px;
}
.tip-icon svg{width:22px;height:22px}
.tip-card h3{font-size:18px;line-height:1.5;font-weight:600;color:var(--ink)}
.tip-card p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--text)}

/* ===== 对照列表 ===== */
.compare{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.compare-head{
  display:grid;grid-template-columns:220px 1fr;gap:24px;
  padding:18px 28px;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  font-size:13px;font-weight:700;letter-spacing:1px;color:var(--brand-700);
}
.compare-row{
  display:grid;grid-template-columns:220px 1fr;gap:24px;align-items:start;
  padding:22px 28px;
  border-bottom:1px solid var(--divider);
  transition:background var(--ease);
}
.compare-row:last-child{border-bottom:0}
.compare-row:hover{background:var(--brand-50)}
.compare-row dt{font-size:15px;font-weight:600;color:var(--ink)}
.compare-row dd{margin:0;font-size:15px;line-height:1.8;color:var(--text)}
.compare-row dd strong{color:var(--brand-700);font-weight:600}

/* ===== FAQ ===== */
.faq-card{
  max-width:880px;margin:0 auto;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.faq-item+.faq-item{border-top:1px solid var(--divider)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;min-height:64px;padding:16px 24px;
  text-align:left;font-size:16px;font-weight:600;color:var(--ink);
  transition:background var(--ease);
}
.faq-q:hover{background:var(--brand-50)}
.faq-q .plus{
  position:relative;flex:0 0 auto;width:20px;height:20px;
  transition:transform var(--ease);
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-600);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-q .plus::before{width:14px;height:2px}
.faq-q .plus::after{width:2px;height:14px;transition:opacity var(--ease)}
.faq-item.open .faq-q{color:var(--brand-700)}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .26s ease}
.faq-a>div{overflow:hidden}
.faq-a p{padding:0 24px 24px;font-size:15px;line-height:1.85;color:var(--text);max-width:760px}
.faq-item.open .faq-a{grid-template-rows:1fr}

/* ===== CTA 与表单 ===== */
.cta-band{
  position:relative;overflow:hidden;
  display:flex;flex-wrap:wrap;align-items:center;gap:32px;
  padding:40px;
  border-radius:var(--radius-lg);
  background:var(--brand-600);
  color:#fff;
  box-shadow:var(--shadow-lift);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.18;pointer-events:none;
}
.cta-band>*{position:relative;z-index:1}
.cta-copy{flex:1 1 460px}
.cta-copy h2{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.2px}
.cta-copy p{margin-top:12px;font-size:16px;line-height:1.8;color:rgba(255,255,255,.86);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.consult-card{
  max-width:820px;margin:32px auto 0;
  padding:32px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-card);
}
.consult-card h3{font-size:20px;font-weight:600;color:var(--ink)}
.consult-card>p{margin-top:8px;font-size:15px;color:var(--muted)}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:24px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:14px;font-weight:600;color:var(--ink)}
.field input,.field select,.field textarea{
  width:100%;min-height:48px;padding:0 16px;
  background:#fff;border:1px solid #D8E3F2;border-radius:var(--radius-btn);
  font-size:15px;color:var(--ink);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.field textarea{min-height:120px;padding:12px 16px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:#A9B6C6}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(42,114,214,.14);
}
.field select{
  appearance:none;-webkit-appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,var(--brand-600) 50%),linear-gradient(135deg,var(--brand-600) 50%,transparent 50%);
  background-position:calc(100% - 20px) 22px,calc(100% - 15px) 22px;
  background-size:5px 5px,5px 5px;
  background-repeat:no-repeat;
}
.check-row{display:flex;align-items:flex-start;gap:10px;grid-column:1/-1;font-size:14px;color:var(--text)}
.check-row input{width:18px;height:18px;min-height:0;margin-top:3px;accent-color:var(--brand-600)}
.check-row a{color:var(--brand-600);border-bottom:1px dashed var(--brand-100)}
.form-foot{grid-column:1/-1;display:flex;justify-content:flex-end;margin-top:4px}
.form-foot .btn{min-width:200px}
.form-success{display:none;text-align:center;padding:28px 8px}
.form-success.show{display:block}
.success-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:56px;height:56px;border-radius:50%;
  background:rgba(18,165,148,.12);color:var(--teal);margin-bottom:16px;
}
.success-mark svg{width:26px;height:26px}
.form-success h4{font-size:20px;font-weight:600;color:var(--ink)}
.form-success p{margin-top:8px;font-size:15px;color:var(--muted)}

/* ===== 页脚 ===== */
.site-footer{background:var(--brand-700);color:#fff;padding:64px 0 32px;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .logo{margin-bottom:18px}
.footer-brand .logo svg{width:40px;height:40px}
.footer-brand .logo .logo-text strong{color:#fff;font-size:16px}
.footer-brand .logo .logo-text small{color:rgba(255,255,255,.72)}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:340px}
.footer-contact{display:flex;flex-direction:column;gap:6px;margin-top:18px;font-size:14px;color:rgba(255,255,255,.72)}
.footer-contact a{color:#fff;border-bottom:1px solid rgba(255,255,255,.32)}
.footer-contact a:hover{border-bottom-color:#fff}
.footer-col h3{
  font-size:14px;font-weight:600;color:#fff;
  padding-bottom:12px;margin-bottom:12px;
  border-bottom:1px solid rgba(255,255,255,.5);
}
.footer-col a,.footer-col .footer-text{
  display:block;font-size:14px;color:rgba(255,255,255,.72);
  padding:5px 0;transition:color var(--ease),transform var(--ease);
}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-note{margin-top:12px;font-size:13px;line-height:1.8;color:rgba(255,255,255,.6)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:40px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;color:rgba(255,255,255,.62);
}

/* ===== 响应式 ===== */
@media (max-width:1023px){
  .main-nav{display:none}
  .header-actions .btn-ghost{display:none}
  .nav-toggle{display:flex}
  .section{padding:64px 0}
  .hero h1{font-size:34px}
  .zigzag .media,.zigzag .body{grid-column:span 12}
  .zigzag.reverse .media{order:0}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .section-head{margin-bottom:32px}
  .section-head h2{font-size:24px}
  .section-head p{font-size:16px}
  .hero{padding:32px 0 16px}
  .hero-inner{padding:36px 20px}
  .hero h1{font-size:30px;line-height:1.3;letter-spacing:-.3px}
  .hero-lead{font-size:16px}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
  .hero-badges{flex-direction:column;align-items:center;gap:12px}
  .zigzag{margin-top:48px;gap:20px}
  .zigzag .media img{height:220px}
  .zigzag .body h2{font-size:24px}
  .tip-grid{grid-template-columns:1fr}
  .compare-head{display:none}
  .compare-row{grid-template-columns:1fr;gap:8px;padding:18px 20px}
  .faq-q{font-size:15px;padding:14px 18px}
  .faq-a p{padding:0 18px 20px}
  .cta-band{padding:28px 22px;gap:24px}
  .cta-copy h2{font-size:24px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .consult-card{padding:22px}
  .form-grid{grid-template-columns:1fr}
  .form-foot .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{margin-top:64px;padding:48px 0 24px}
  .footer-bottom{flex-direction:column}
}

/* roulang page: category3 */
:root{
  --brand-700:#0E3C7E;
  --brand-600:#1758B0;
  --brand-500:#2A72D6;
  --brand-100:#E8F0FC;
  --brand-50:#F4F8FE;
  --teal:#12A594;
  --amber:#E8862A;
  --red:#D64545;
  --bg:#F7F9FC;
  --card:#FFFFFF;
  --surface:#EDF3FB;
  --border:#E2E9F2;
  --divider:#EDF1F7;
  --ink:#0E1B2C;
  --text:#47576B;
  --muted:#7C8CA0;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --shadow-sm:0 1px 2px rgba(14,27,44,.05);
  --shadow-card:0 2px 4px rgba(14,27,44,.04),0 12px 28px rgba(14,27,44,.06);
  --shadow-lift:0 6px 12px rgba(14,27,44,.06),0 20px 40px rgba(23,88,176,.12);
  --ease:.18s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:var(--brand-600);text-decoration:none;transition:color var(--ease),background-color var(--ease),border-color var(--ease),transform var(--ease)}
a:hover{color:var(--brand-500)}
img{max-width:100%;display:block;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;letter-spacing:.2px;
  border:1px solid transparent;cursor:pointer;
  transition:background-color var(--ease),color var(--ease),box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.btn svg{width:16px;height:16px;flex:0 0 16px}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--brand-500);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-lift)}
.btn-primary:active{background:var(--brand-700);transform:none;box-shadow:var(--shadow-sm)}
.btn-ghost{background:#fff;border-color:#D8E3F2;color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-50);border-color:var(--brand-100);color:var(--brand-700)}
.btn-ghost:active{background:var(--brand-100)}
.btn-light{background:#fff;color:var(--brand-700);box-shadow:var(--shadow-sm)}
.btn-light:hover{background:#F2F6FC;color:var(--brand-700);transform:translateY(-1px);box-shadow:var(--shadow-lift)}
.btn-light:active{transform:none;background:#E4EDF9}
.btn-lg{min-height:52px;padding:0 28px;border-radius:var(--r-md);font-size:16px}
.btn:disabled{background:#C3D3E6;color:#7C8CA0;box-shadow:none;cursor:not-allowed;transform:none}

/* ---------- 头部 ---------- */
.site-header{position:sticky;top:0;z-index:120;background:rgba(255,255,255,.96);border-bottom:1px solid var(--border);backdrop-filter:saturate(180%) blur(8px);transition:box-shadow var(--ease)}
.site-header.scrolled{box-shadow:var(--shadow-sm)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo svg{width:38px;height:38px;border-radius:10px;flex:0 0 38px}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:.2px}
.logo-text small{font-size:10px;font-weight:500;letter-spacing:2px;color:var(--muted)}
.main-nav{display:flex;align-items:center;gap:4px;margin:0 auto}
.nav-link{position:relative;display:inline-flex;align-items:center;min-height:44px;padding:0 14px;font-size:15px;font-weight:500;color:var(--text);border-radius:8px}
.nav-link:hover{color:var(--brand-600);background:var(--brand-50)}
.nav-link.active{color:var(--brand-600);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:50%;bottom:-1px;transform:translateX(-50%);width:60%;height:2px;border-radius:2px;background:var(--brand-600)}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--border);border-radius:var(--r-sm);background:#fff;color:var(--brand-700)}
.nav-toggle:hover{background:var(--brand-50);border-color:var(--brand-100)}
.nav-toggle svg{width:22px;height:22px}
.mobile-drawer{display:none;border-top:1px solid var(--border);background:#fff;padding:8px 24px 22px}
.mobile-drawer.open{display:block}
.mobile-drawer a{display:flex;align-items:center;min-height:56px;font-size:16px;font-weight:500;color:var(--text);border-bottom:1px solid var(--divider)}
.mobile-drawer a:hover{color:var(--brand-600)}
.mobile-drawer a.active{color:var(--brand-600);font-weight:600}
.mobile-drawer .btn{width:100%;margin-top:18px}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:22px 0 0;font-size:14px;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb span.sep{margin:0 8px;color:#C3D0E0}
.breadcrumb .current{color:var(--brand-600);font-weight:500}

/* ---------- Hero（窄栏） ---------- */
.hero-narrow{padding:36px 0 20px}
.hero-narrow .inner{max-width:720px;margin:0 auto;text-align:center}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:2px;color:var(--brand-600)}
.hero-narrow h1{
  margin:14px 0 18px;
  font-size:44px;line-height:1.22;font-weight:700;
  letter-spacing:-.5px;color:var(--ink);
}
.hero-narrow .lead{font-size:17px;line-height:1.85;color:var(--text)}
.hero-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:28px}
.hero-tips{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:26px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;background:var(--card);border:1px solid var(--border);font-size:13px;font-weight:500;color:var(--text);box-shadow:var(--shadow-sm)}
.chip svg{width:14px;height:14px;color:var(--teal)}

/* ---------- 通用板块 ---------- */
.section{padding:80px 0}
.section--surface{background:var(--surface)}
.section-head{max-width:720px;margin:0 auto 44px;text-align:center}
.section-head h2{margin:12px 0 12px;font-size:32px;line-height:1.3;font-weight:700;color:var(--ink);letter-spacing:-.3px}
.section-sub{font-size:16px;line-height:1.85;color:var(--muted)}

/* ---------- 版本列表 ---------- */
.version-list{max-width:1000px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-sm);overflow:hidden}
.version-item{display:grid;grid-template-columns:132px 1fr;gap:28px;padding:26px 28px;border-bottom:1px solid var(--divider);transition:background-color var(--ease)}
.version-item:last-child{border-bottom:0}
.version-item:hover{background:var(--brand-50)}
.version-meta{display:flex;flex-direction:column;gap:4px}
.v-num{font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;font-variant-numeric:tabular-nums;font-size:19px;font-weight:700;color:var(--brand-700);letter-spacing:.2px}
.v-date{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.v-tag{align-self:flex-start;margin-top:8px;padding:2px 10px;border-radius:999px;background:var(--brand-100);color:var(--brand-700);font-size:12px;font-weight:600;line-height:1.7}
.v-tag.is-now{background:#E4F6F3;color:#0C7F72}
.v-body h3{font-size:17px;line-height:1.5;font-weight:600;color:var(--ink);margin-bottom:10px}
.v-body ul{display:grid;gap:8px}
.v-body li{position:relative;padding-left:20px;font-size:15px;line-height:1.8;color:var(--text)}
.v-body li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--brand-500)}

/* ---------- 升级核对（图文） ---------- */
.split{display:grid;grid-template-columns:1.02fr .98fr;gap:48px;align-items:center}
.split-figure{margin:0;position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--border);background:var(--brand-50);box-shadow:var(--shadow-card)}
.split-figure img{width:100%;aspect-ratio:16/11;object-fit:cover}
.split-caption{position:absolute;left:16px;bottom:16px;padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.94);font-size:13px;font-weight:600;color:var(--brand-700);box-shadow:var(--shadow-sm)}
.check-list{display:grid;gap:16px;margin-top:24px}
.check-list li{display:grid;grid-template-columns:26px 1fr;gap:12px;padding:16px 18px;background:var(--card);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-sm);transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease)}
.check-list li:hover{border-color:var(--brand-100);box-shadow:var(--shadow-card);transform:translateY(-2px)}
.check-icon{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;background:#E4F6F3;color:var(--teal);margin-top:2px}
.check-icon svg{width:14px;height:14px}
.check-list strong{display:block;font-size:15px;font-weight:600;color:var(--ink);margin-bottom:2px}
.check-list p{font-size:14px;line-height:1.8;color:var(--text)}

/* ---------- FAQ ---------- */
.faq{max-width:880px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-sm);overflow:hidden}
.faq-item + .faq-item{border-top:1px solid var(--divider)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;padding:16px 24px;text-align:left;font-size:16px;font-weight:600;color:var(--ink);transition:background-color var(--ease),color var(--ease)}
.faq-q:hover{background:var(--brand-50);color:var(--brand-700)}
.faq-icon{flex:0 0 20px;width:20px;height:20px;color:var(--brand-600);transition:transform var(--ease)}
.faq-icon svg{width:20px;height:20px;display:block}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:420px}
.faq-a p{padding:0 24px 24px;font-size:15px;line-height:1.9;color:var(--text)}

/* ---------- CTA 条 ---------- */
.cta-band{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:44px 40px;border-radius:20px;color:#fff;
  background-image:linear-gradient(120deg,rgba(14,60,126,.94),rgba(23,88,176,.86)),url(/assets/images/backpic/back-2.png);
  background-size:cover;background-position:center;
  box-shadow:var(--shadow-card);
}
.cta-band::after{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;border:1px solid rgba(255,255,255,.18);pointer-events:none}
.cta-band h2{font-size:28px;line-height:1.35;font-weight:700;color:#fff;margin-bottom:10px}
.cta-band p{font-size:15px;line-height:1.85;color:rgba(255,255,255,.86);max-width:640px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto;position:relative;z-index:1}
.cta-band .btn-ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.4);color:#fff}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.22);color:#fff;border-color:rgba(255,255,255,.6)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-700);color:#fff;padding:64px 0 32px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-text strong{color:#fff}
.footer-brand .logo-text small{color:rgba(255,255,255,.6)}
.footer-desc{font-size:14px;line-height:1.9;color:rgba(255,255,255,.72);max-width:360px}
.footer-contact{margin-top:18px;display:grid;gap:6px;font-size:13px;color:rgba(255,255,255,.62)}
.footer-contact a{color:rgba(255,255,255,.86)}
.footer-contact a:hover{color:#fff}
.footer-col h3{font-size:14px;font-weight:600;color:#fff;padding-bottom:12px;margin-bottom:14px;border-bottom:1px solid rgba(255,255,255,.16)}
.footer-col a,.footer-col .footer-text{display:block;font-size:14px;color:rgba(255,255,255,.72);padding:6px 0;transition:color var(--ease),transform var(--ease)}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-note{margin-top:12px;font-size:13px;line-height:1.8;color:rgba(255,255,255,.55)}
.footer-bottom{margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.58)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hero-narrow h1{font-size:38px}
  .split{gap:36px}
}
@media (max-width:1023px){
  .main-nav{display:none}
  .nav-toggle{display:inline-flex}
  .header-actions .btn-ghost{display:none}
  .header-actions .btn-primary{min-height:40px;padding:0 16px;font-size:14px;border-radius:10px}
  .section{padding:64px 0}
  .section-head h2{font-size:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .split{grid-template-columns:1fr}
  .split-figure{order:-1}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 28px}
  .cta-actions{width:100%}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .hero-narrow{padding:28px 0 12px}
  .hero-narrow h1{font-size:30px;line-height:1.3;letter-spacing:0}
  .hero-narrow .lead{font-size:15px}
  .hero-actions .btn{width:100%}
  .section{padding:48px 0}
  .section-head{margin-bottom:32px;text-align:left}
  .section-head h2{font-size:24px}
  .section-sub{font-size:15px}
  .version-item{grid-template-columns:1fr;gap:14px;padding:22px 18px}
  .version-meta{flex-direction:row;align-items:center;flex-wrap:wrap;gap:10px}
  .v-tag{margin-top:0}
  .faq-q{font-size:15px;padding:16px 18px}
  .faq-a p{padding:0 18px 20px;font-size:14px}
  .cta-band h2{font-size:22px}
  .cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .header-inner{height:64px;gap:12px}
  .logo svg{width:34px;height:34px;flex-basis:34px}
  .logo-text strong{font-size:15px}
  .header-actions .btn-primary{display:none}
  .footer-grid{grid-template-columns:1fr}
  .check-list li{grid-template-columns:24px 1fr;padding:14px}
}