/* ===== 准投 · 前台/公网样式 ===== */
:root{
  --bg:#0a0f1e;--bg-2:#0d1528;--panel:#111a30;--panel-2:#131e38;
  --line:rgba(148,163,184,.16);--line-soft:rgba(148,163,184,.10);
  --txt:#e2e8f0;--muted:#94a3b8;--dim:#64748b;
  --cyan:#22d3ee;--cyan-deep:#06b6d4;--blue:#3b82f6;
  --emerald:#10b981;--violet:#8b5cf6;--amber:#f59e0b;--rose:#ec4899;
  --grad:linear-gradient(135deg,#06b6d4,#3b82f6);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--txt);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.container{max-width:1120px;margin:0 auto;padding:0 24px}
section{padding:80px 0;position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--cyan);text-transform:uppercase;margin-bottom:16px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--grad);border-radius:2px}
.section-head{text-align:center;max-width:720px;margin:0 auto 48px}
.section-head h2{font-size:clamp(26px,4vw,40px);font-weight:800;letter-spacing:-.01em;line-height:1.2}
.section-head p{color:var(--muted);margin-top:14px;font-size:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:12px;font-weight:600;font-size:15px;cursor:pointer;transition:.18s;border:1px solid transparent;white-space:nowrap}
.btn-primary{background:var(--grad);color:#04121f;box-shadow:0 10px 30px -10px rgba(59,130,246,.5)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 38px -10px rgba(59,130,246,.65)}
.btn-ghost{background:rgba(148,163,184,.06);border-color:var(--line);color:var(--txt)}
.btn-ghost:hover{background:rgba(148,163,184,.13)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-danger{background:rgba(239,68,68,.12);border-color:rgba(239,68,68,.4);color:#fca5a5}
.card{background:var(--panel);border:1px solid var(--line-soft);border-radius:18px}
.rv{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none}}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(10,15,30,.72);backdrop-filter:blur(14px);border-bottom:1px solid var(--line-soft)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{height:34px;mix-blend-mode:screen}
.nav-links{display:flex;align-items:center;gap:26px;font-size:14.5px;color:var(--muted)}
.nav-links a{transition:color .15s}
.nav-links a:hover{color:var(--txt)}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;background:none;border:none;color:var(--txt);cursor:pointer}
@media(max-width:900px){
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;gap:0;background:rgba(13,21,40,.98);border-bottom:1px solid var(--line);padding:10px 24px}
  .nav-links.open{display:flex}
  .nav-links a{width:100%;padding:13px 0;border-bottom:1px solid var(--line-soft)}
  .nav-toggle{display:block}
  .nav-cta .btn:nth-child(1){display:none}
}

/* Hero */
.hero{overflow:hidden;padding:92px 0 88px;text-align:center}
.orb{position:absolute;border-radius:50%;filter:blur(110px);pointer-events:none;opacity:.5}
.orb-1{width:620px;height:620px;left:4%;top:-10%;background:radial-gradient(circle,#3b82f6,#3b82f600 70%)}
.orb-2{width:480px;height:480px;right:2%;bottom:-12%;background:radial-gradient(circle,#8b5cf6,#8b5cf600 70%)}
.hero-inner{position:relative;z-index:2;max-width:820px;margin:0 auto}
.hero-badge{display:inline-flex;align-items:center;gap:10px;padding:8px 16px;border-radius:999px;background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.25);color:var(--cyan);font-size:14px;font-weight:600;margin-bottom:26px}
.hero-badge svg{width:16px;height:16px}
.hero h1{font-size:clamp(34px,5.4vw,56px);font-weight:900;letter-spacing:-.02em;line-height:1.12;margin-bottom:22px}
.hero h1 .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--muted);font-size:18px;max-width:640px;margin:0 auto 36px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.hero-stats{display:flex;flex-wrap:wrap;gap:16px 28px;justify-content:center;margin-top:46px}
.hero-stats .hs{font-size:13px;color:var(--dim);display:flex;align-items:center;gap:8px}
.hero-stats .hs b{color:var(--txt);font-size:15px}

/* 通用栅格 */
.steps-grid,.deep-grid,.why-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media(min-width:768px){.steps-grid,.deep-grid,.why-grid{grid-template-columns:repeat(2,1fr)}}
.steps-grid.steps3{grid-template-columns:1fr}
@media(min-width:768px){.steps-grid.steps3{grid-template-columns:repeat(3,1fr)}}
.step{position:relative;padding:34px 30px}
.step .num{font-size:52px;font-weight:900;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:18px}
.step h3,.item h3,.why-item h3,.feature h3,.ai-item h3{font-size:17px;font-weight:700;margin-bottom:8px}
.step p,.item p,.why-item p,.feature p,.ai-item p{color:var(--muted);font-size:14.5px}
.item,.why-item{display:flex;gap:18px;padding:26px;align-items:flex-start}
.icon{width:48px;height:48px;flex-shrink:0;border-radius:14px;display:grid;place-items:center;color:#fff;margin-bottom:14px}
.icon svg{width:24px;height:24px}
.link-more{display:inline-flex;align-items:center;gap:8px;color:var(--cyan);font-weight:600;font-size:15px}
.link-more svg{width:16px;height:16px}
.link-more:hover svg{transform:translateX(3px)}
.feature-grid,.ai-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:640px){.feature-grid,.ai-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.feature-grid{grid-template-columns:repeat(4,1fr)}.ai-grid{grid-template-columns:repeat(3,1fr)}}
.feature{padding:26px;transition:.18s}.feature:hover{border-color:rgba(34,211,238,.4);transform:translateY(-3px)}
.ai-item{padding:28px}
.tag-soon{font-size:11px;font-weight:700;color:var(--amber);background:rgba(245,158,11,.12);border:1px solid rgba(245,158,11,.3);padding:2px 9px;border-radius:999px}
.ai-item h3{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.stats-band{display:grid;grid-template-columns:1fr 1fr;gap:18px;background:linear-gradient(135deg,rgba(34,211,238,.08),rgba(139,92,246,.08));border:1px solid var(--line-soft);border-radius:20px;padding:30px}
@media(min-width:768px){.stats-band{grid-template-columns:repeat(4,1fr)}}
.stat{text-align:center}
.stat .val{font-size:40px;font-weight:900;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:8px}
.stat .lab{color:var(--muted);font-size:13px}
.agency-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;background:linear-gradient(135deg,rgba(59,130,246,.14),rgba(139,92,246,.12));border:1px solid var(--line-soft);border-radius:22px;padding:42px 40px}
.agency-inner h2{font-size:clamp(24px,3.4vw,34px);font-weight:800;margin-bottom:10px}
.agency-inner p{color:var(--muted);max-width:560px}
.agency-inner .hl{color:var(--cyan);font-weight:800}
.agency-perks{display:flex;flex-wrap:wrap;gap:18px 30px;margin-top:18px;font-size:14px}
.agency-perks span{display:inline-flex;align-items:center;gap:8px}
.agency-perks svg{width:16px;height:16px;color:var(--emerald)}
.price-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:640px){.price-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.price-grid{grid-template-columns:repeat(4,1fr)}}
.plan{padding:30px;display:flex;flex-direction:column;text-align:center}
.plan.popular{border-color:rgba(34,211,238,.55);box-shadow:0 0 0 1px rgba(34,211,238,.25),0 24px 50px -20px rgba(34,211,238,.35);position:relative}
.plan .pop-tag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--grad);color:#04121f;font-size:12px;font-weight:800;padding:4px 14px;border-radius:999px}
.plan .pname{font-size:16px;font-weight:700;color:var(--muted);margin-bottom:14px}
.plan .price{font-size:42px;font-weight:900;letter-spacing:-.02em}
.plan .price small{font-size:15px;font-weight:500;color:var(--dim)}
.plan .desc{margin-top:20px;display:grid;gap:10px;color:var(--muted);font-size:14px}
.plan .desc div{display:flex;justify-content:space-between;gap:10px;border-top:1px dashed var(--line-soft);padding-top:10px}
.plan .desc b{color:var(--txt);font-weight:600}
.plan .btn{margin-top:auto}
.guides-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:640px){.guides-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.guides-grid{grid-template-columns:repeat(3,1fr)}}
.guide-card{display:block;padding:26px;transition:.18s}
.guide-card:hover{border-color:rgba(34,211,238,.4);transform:translateY(-3px)}
.guide-card .glabel{font-size:12px;font-weight:700;color:var(--cyan);letter-spacing:.05em;margin-bottom:12px}
.guide-card h3{font-size:18px;font-weight:700;line-height:1.4;margin-bottom:10px}
.guide-card p{color:var(--muted);font-size:14.5px;margin-bottom:18px}
.guide-meta{display:flex;align-items:center;justify-content:space-between;color:var(--dim);font-size:13px}
.guide-meta .read{display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-weight:600}
.guide-meta .read svg{width:15px;height:15px}
.final-cta{background:var(--bg-2);border-top:1px solid var(--line-soft);padding:90px 0}
.cta-box{text-align:center;max-width:680px;margin:0 auto}
.cta-box h2{font-size:clamp(28px,4.4vw,42px);font-weight:900;letter-spacing:-.02em;line-height:1.15;margin-bottom:16px}
.cta-box p{color:var(--muted);font-size:17px;margin-bottom:34px}

/* 表单/卡片页 */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:30px;background:var(--bg)}
.auth-card{width:100%;max-width:440px;background:var(--panel);border:1px solid var(--line-soft);border-radius:20px;padding:36px}
.auth-card .brand{justify-content:center;margin-bottom:22px}
.auth-card .brand-logo{height:40px}
.auth-card h1{font-size:24px;font-weight:800;text-align:center;margin-bottom:6px}
.auth-card .sub{text-align:center;color:var(--muted);font-size:14px;margin-bottom:24px}
.field{display:grid;gap:6px;margin-bottom:16px}
.field label{font-size:13px;color:var(--muted)}
.field input,.field select,.field textarea{width:100%;padding:11px 13px;border-radius:11px;border:1px solid rgba(148,163,184,.25);background:#0d1528;color:var(--txt);font-size:14px;font-family:inherit}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--cyan)}
.alert{padding:12px 14px;border-radius:11px;font-size:14px;margin-bottom:16px}
.alert.success{background:rgba(16,185,129,.12);border:1px solid rgba(16,185,129,.4);color:#6ee7b7}
.alert.error{background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.4);color:#fca5a5}
.form-card{max-width:640px;margin:0 auto;padding:36px;background:var(--panel);border:1px solid var(--line-soft);border-radius:20px}
.form-card h1{font-size:26px;font-weight:800;margin-bottom:6px}
.form-card .sub{color:var(--muted);font-size:14px;margin-bottom:24px}
.form-actions{display:flex;gap:12px;margin-top:8px;flex-wrap:wrap}
.page-title{font-size:clamp(28px,4vw,40px);font-weight:800;margin-bottom:34px;text-align:center}

/* 页脚 */
.footer{border-top:1px solid var(--line-soft);padding:52px 0 40px}
.footer-inner{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:768px){.footer-inner{grid-template-columns:2fr 1fr 1fr 1fr}}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{color:var(--muted);font-size:14px;max-width:320px}
.footer-col h4{font-size:14px;font-weight:700;margin-bottom:16px}
.footer-col a{display:block;color:var(--muted);font-size:14px;margin-bottom:11px}
.footer-col a:hover{color:var(--txt)}
.footer-bottom{margin-top:38px;padding-top:24px;border-top:1px solid var(--line-soft);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;color:var(--dim);font-size:13px}
.article{max-width:760px;margin:0 auto;padding:40px 0 80px}
.article h1{font-size:clamp(26px,4vw,38px);font-weight:800;line-height:1.3;margin:16px 0 12px}
.article .meta{color:var(--dim);font-size:14px;margin-bottom:28px}
.article .body{color:#cbd5e1;font-size:16px;line-height:1.9}
.article .body h2{color:var(--txt);font-size:22px;font-weight:700;margin:28px 0 12px}
.article .body p{margin:14px 0}
.article .body ul{padding-left:22px;margin:14px 0}
.article .body li{margin:6px 0}

#toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);background:#131e38;border:1px solid rgba(34,211,238,.4);padding:12px 22px;border-radius:12px;font-size:14px;opacity:0;pointer-events:none;transition:.3s;z-index:99;box-shadow:0 10px 30px rgba(0,0,0,.5)}