/* ============================================================
   AI·LABA 爱喇叭 — 官网样式 v3（蓝色品牌主题，匹配新 Logo）
   设计令牌：蓝色主色 + 活力橙点缀；无外部字体/图标依赖
   ============================================================ */
:root{
  --brand:#4169E1;--brand-600:#3558C9;--brand-050:#EEF2FC;
  --mint:#10b981;--mint-050:#e7f8f1;
  --amber:#E8613C;--amber-050:#FFF3F0;
  --ink:#15161d;--ink-2:#3c3d47;--gray:#6b6c76;--gray-soft:#9a9ba4;
  --line:#e2e8f0;--paper:#ffffff;--bg:#f8f9fc;--bg-2:#eef2f9;
  --radius:18px;--radius-sm:12px;
  --shadow-sm:0 2px 8px rgba(21,22,29,.05);
  --shadow:0 12px 34px rgba(21,22,29,.09);
  --shadow-lg:0 28px 70px rgba(65,105,225,.14);
  --maxw:1180px;
  --font:"PingFang SC","Microsoft YaHei","Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--ink);background:var(--paper);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;height:auto}
ul,ol{list-style:none}
::selection{background:var(--brand);color:#fff}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.04em;color:var(--brand);background:var(--brand-050);border:1px solid #d0ddef;padding:6px 14px;border-radius:100px}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--brand)}
h1,h2,h3,h4{letter-spacing:-.01em;line-height:1.2}
.section{padding:96px 0}
.section-head{max-width:760px;margin:0 auto 56px;text-align:center}
.section-head h2{font-size:clamp(28px,4vw,42px);font-weight:800;margin:18px 0 14px}
.section-head p{color:var(--gray);font-size:17px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:15px;padding:13px 26px;border-radius:100px;cursor:pointer;border:1.5px solid transparent;transition:.22s ease;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 22px rgba(65,105,225,.28)}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-2px);box-shadow:0 12px 30px rgba(65,105,225,.36)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-lg{padding:16px 34px;font-size:16px}

/* ============ NAV ============ */
header.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.88);backdrop-filter:saturate(180%) blur(16px);border-bottom:1px solid transparent;transition:.3s}
header.nav.scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-sm)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink)}
.brand img{height:60px;width:auto;border-radius:0}
.nav-links{display:flex;align-items:center;gap:20px}
.nav-links a{font-size:14.5px;font-weight:600;color:var(--ink-2);transition:.2s}
.nav-links a:hover{color:var(--brand)}
.nav-links .btn-primary{color:#fff}

.lang-switch{display:inline-flex;align-items:center;gap:4px;background:var(--bg);border:1px solid var(--line);border-radius:100px;padding:4px 6px;margin-left:8px}
.lang-switch a{font-size:12px;font-weight:700;padding:4px 10px;border-radius:100px;transition:.2s;color:var(--gray)}
.lang-switch a.active{background:var(--brand);color:#fff}
.lang-switch a:hover:not(.active){color:var(--brand)}
.nav-cta{display:inline-flex}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:22px;height:2px;background:var(--ink);border-radius:2px}

/* ============ HERO ============ */
.hero{padding:72px 0 40px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(60% 60% at 85% 10%,rgba(65,105,225,.08),transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;position:relative}
.hero h1{font-size:clamp(34px,5vw,58px);font-weight:900;line-height:1.14;margin:22px 0 18px}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero .lead{font-size:18px;color:var(--gray);max-width:560px;margin-bottom:30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap}
.tag{font-size:13px;font-weight:600;color:var(--ink-2);background:var(--bg);border:1px solid var(--line);border-radius:100px;padding:7px 14px}
.tag b{color:var(--brand)}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:26px;box-shadow:var(--shadow)}
.hero-card h3{font-size:17px;margin-bottom:14px}
.loop{display:flex;flex-direction:column;gap:8px}
.loop-step{display:flex;align-items:center;gap:12px;font-size:13.5px;color:var(--ink-2);background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:9px 14px}
.loop-step .n{width:22px;height:22px;flex:none;border-radius:50%;background:var(--brand-050);color:var(--brand);display:grid;place-items:center;font-size:11px;font-weight:800}

/* ============ FAMILIES ============ */
.families,.fam{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.family,.fam-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 18px;transition:.22s;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:6px}
.family:hover,.fam-item:hover{border-color:var(--brand);transform:translateY(-3px);box-shadow:var(--shadow)}
.family .fi,.fam-item .fi{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;font-size:22px;margin-bottom:14px}
.family h3,.fam-item h3{font-size:15px;margin-bottom:6px}
.family p,.fam-item p{font-size:12.5px;color:var(--gray);line-height:1.55}
.fam-item .no{font-size:11px;font-weight:700;color:var(--brand);letter-spacing:.06em;text-transform:uppercase}
.fam-item b{font-size:16px;font-weight:800;display:block;margin-bottom:4px}

/* ============ ROLES ============ */
.roles4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.role{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.role .ri{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;font-size:24px;margin-bottom:16px}
.role b{font-size:16px;display:block;margin-bottom:6px}
.role p{font-size:13px;color:var(--gray);line-height:1.6}

/* ============ AI OS ============ */
.aios{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-top:34px}
.ai-layer{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-sm);padding:18px 14px;text-align:center}
.ai-layer .ln{font-size:11px;font-weight:800;color:var(--brand);margin-bottom:6px}
.ai-layer p{font-size:12px;color:var(--gray-2)}

/* ============ COPILOT ============ */
.copilot{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:28px}
.cp{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px}
.cp b{font-size:14px;display:block;margin-bottom:6px}
.cp p{font-size:12.5px;color:var(--gray);line-height:1.55}

/* ============ ENTRY ============ */
.entry{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.ent{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.22s}
.ent:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.ent .ei{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;font-size:26px;margin-bottom:18px}
.ent h3{font-size:18px;margin-bottom:8px}
.ent p{font-size:13.5px;color:var(--gray);line-height:1.65;margin-bottom:16px}

/* ============ FAMILY DETAIL ============ */
.fam-detail{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.fam-detail .fdi{width:72px;height:72px;border-radius:20px;display:grid;place-items:center;font-size:32px}
.fam-detail h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.fam-detail .lead{font-size:16px;color:var(--gray);margin-bottom:24px}
.steps{display:flex;flex-direction:column;gap:10px}
.step{display:flex;align-items:center;gap:14px;font-size:14px;color:var(--ink-2);background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:12px 16px}
.step .sn{width:26px;height:26px;flex:none;border-radius:50%;background:var(--brand-050);color:var(--brand);display:grid;place-items:center;font-size:12px;font-weight:800}
.fam-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}

/* ============ PRICING ============ */
.price-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:24px}
.price-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;position:relative}
.price-card.featured{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-050)}
.price-card .badge{position:absolute;top:-10px;left:50%;transform:translateX(-50%);background:var(--brand);color:#fff;font-size:11px;font-weight:800;padding:3px 12px;border-radius:100px}
.price-card b{font-size:22px;display:block;margin-bottom:4px}
.price-card .desc{font-size:12.5px;color:var(--gray);line-height:1.5}
.price-card .note{font-size:11.5px;color:var(--gray-soft);margin-top:10px}

/* ============ STATS ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:40px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;text-align:center}
.stat b{font-size:clamp(26px,3vw,36px);font-weight:900;color:var(--brand);display:block;margin-bottom:6px}
.stat span{font-size:13px;color:var(--gray)}

/* ============ CITIES ============ */
.city-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.city-link{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px;font-size:14px;font-weight:700;text-align:center;transition:.2s}
.city-link:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}

/* ============ COMPARE ============ */
.compare{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}
.cmp{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.cmp b{font-size:15px;display:block;margin-bottom:10px}
.cmp ul{font-size:13px;color:var(--gray);line-height:1.7}
.comp-arrow{display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--brand)}
.comp-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.comp-card h3{font-size:17px;margin-bottom:16px}
.comp-item{padding:10px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--ink-2);line-height:1.5}
.comp-item:last-child{border-bottom:none}
.comp-item b{color:var(--ink);font-weight:700}
.comp-item span{color:var(--gray);font-size:13px;display:block;margin-top:2px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.22s}
.card:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.card .ic{width:44px;height:44px;border-radius:12px;background:var(--brand-050);display:grid;place-items:center;font-size:20px;margin-bottom:14px}
.card b{font-size:15px;display:block;margin-bottom:6px}
.card p{font-size:13px;color:var(--gray);line-height:1.55}
.route{display:inline-block;font-size:12px;font-weight:600;color:var(--brand);background:var(--brand-050);border:1px solid #d0ddef;border-radius:100px;padding:4px 12px;margin-top:8px}
.fee{font-size:28px;font-weight:900;color:var(--brand);line-height:1.1;margin:8px 0}
.fee small{font-size:13px;font-weight:600;color:var(--gray);margin-left:4px}
.price-card.hot{border-color:var(--amber);box-shadow:0 0 0 3px var(--amber-050)}
.city-col{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 18px}
.city-col h3{font-size:15px;font-weight:800;margin-bottom:10px;color:var(--ink)}
.city-col ul{display:flex;flex-direction:column;gap:6px}
.city-col li{font-size:13px}
.city-col li a{color:var(--gray);transition:.2s}
.city-col li a:hover{color:var(--brand)}
.stat .v{font-size:clamp(22px,3vw,30px);font-weight:900;color:var(--brand);line-height:1.1}
.stat .v small{font-size:13px;font-weight:600;color:var(--gray);margin-left:4px}
.stat p{font-size:13px;color:var(--gray);margin-top:6px}

/* ============ PACKAGES ============ */
.pkg-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:34px}
.pkg{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-sm);padding:18px}
.pkg b{font-size:15px;display:block;margin-bottom:4px}
.pkg span{font-size:12.5px;color:var(--gray)}
.finance-note{margin-top:24px;font-size:14px;color:var(--ink-2);background:var(--amber-050);border:1px solid #fde0d8;border-radius:var(--radius-sm);padding:14px 18px}

/* ============ CASES ============ */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.case .ci{width:44px;height:44px;border-radius:12px;background:var(--mint-050);display:grid;place-items:center;font-size:20px;margin-bottom:14px}
.case b{font-size:16px;display:block;margin-bottom:6px}
.case p{font-size:13.5px;color:var(--gray)}

/* ============ COMPLIANCE ============ */
.comp-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.cbox{display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.cbox .cbi{width:48px;height:48px;flex:none;border-radius:13px;background:var(--mint-050);display:grid;place-items:center;font-size:22px}
.cbox b{font-size:16px;display:block;margin-bottom:6px}
.cbox p{font-size:13.5px;color:var(--gray)}

/* ============ FAQ (GEO 重点) ============ */
.faq{max-width:820px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:0 22px;margin-bottom:12px;transition:.2s}
.faq details[open]{border-color:var(--brand)}
.faq summary{cursor:pointer;font-weight:700;font-size:15.5px;padding:18px 0;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;color:var(--brand);flex:none;transition:.2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 0 20px;font-size:14px;color:var(--gray);line-height:1.7}

/* ============ CTA / FOOTER ============ */
.cta-sec{background:linear-gradient(135deg,var(--brand),#6B9FFF 55%,#8DB5F0);border-radius:32px;padding:72px 40px;text-align:center;color:#fff;position:relative;overflow:hidden}
.cta-sec::before{content:"";position:absolute;inset:0;background:radial-gradient(50% 80% at 80% 120%,rgba(16,185,129,.2),transparent 60%)}
.cta-sec>*{position:relative}
.cta-sec h2{font-size:clamp(28px,4vw,42px);font-weight:850;margin-bottom:16px}
.cta-sec p{font-size:18px;color:rgba(255,255,255,.9);max-width:560px;margin:0 auto 24px}
.cta-sec .btn-primary{background:#fff;color:var(--brand)}
.cta-sec .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.cta-sec .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}
footer{background:#fff;color:var(--ink-2);border-top:1px solid var(--line);padding:64px 0 32px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;margin-bottom:44px}
.foot-brand .brand{margin-bottom:16px}
.foot-brand p{font-size:14px;color:var(--gray);max-width:320px}
.foot-col h4{font-size:14px;color:var(--ink);margin-bottom:18px;font-weight:700}
.foot-col a{display:block;font-size:14px;color:var(--gray);margin-bottom:12px;transition:.2s}
.foot-col a:hover{color:var(--brand)}
.foot-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--gray-soft);margin-bottom:24px}
.foot-beian{border-top:1px solid var(--line);padding-top:22px;display:flex;justify-content:center;flex-wrap:wrap;gap:6px 18px;font-size:12px;color:var(--gray-soft)}
.foot-beian a{color:inherit;transition:.2s}
.foot-beian a:hover{opacity:1;text-decoration:underline}

/* ============ REVEAL ============ */
.reveal{opacity:0;transform:translateY(28px);transition:.7s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ============ RESPONSIVE ============ */
@media(max-width:920px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .g3,.g2,.g4,.roles4,.aios,.copilot,.fam,.entry,.price-grid,.cases,.city-grid,.pkg-strip{grid-template-columns:1fr 1fr}
  .compare{grid-template-columns:1fr;gap:16px}
  .comp-arrow{transform:rotate(90deg);text-align:center}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .section{padding:64px 0}
  .nav-links{display:none}
  .burger{display:flex}
  .nav-links.open{display:flex;position:absolute;top:70px;left:0;right:0;flex-direction:column;background:#fff;padding:20px 24px;gap:18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .g3,.g2,.g4,.roles4,.aios,.copilot,.fam,.entry,.price-grid,.cases,.city-grid,.comp-list,.pkg-strip,.stats{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  .cta-sec{padding:48px 24px}
  .foot-grid{grid-template-columns:1fr}
  .hero-cta .btn{flex:1}
}