* { margin:0; padding:0; box-sizing:border-box; }
:root {
  --primary:#2f6bff; --primary-deep:#2254e8; --primary-soft:#eef3ff;
  --bg:#f5f7fb; --card:#ffffff; --line:#e6eaf3; --text:#1b2540; --muted:#7a86a3;
  --ok:#1fbf75; --bad:#f05555; --radius:16px;
}
html { scroll-behavior:smooth; }
body { font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif; background:var(--bg); color:var(--text); -webkit-font-smoothing:antialiased; }
a { color:var(--primary); text-decoration:none; }
img { max-width:100%; }

/* 顶部导航 */
.head { position:sticky; top:0; z-index:50; background:rgba(255,255,255,.9); backdrop-filter:blur(10px); border-bottom:1px solid var(--line); }
.head-in { max-width:1180px; margin:0 auto; display:flex; align-items:center; justify-content:space-between; padding:14px 22px; }
.head-logo { display:flex; align-items:center; gap:11px; }
.head-logo img { width:40px; height:40px; border-radius:11px; object-fit:contain; background:#fff; }
.head-logo span { font-size:18px; font-weight:800; letter-spacing:.3px; }
.head-logo b { color:#b9c6e2; font-weight:600; }
.head-nav { display:flex; align-items:center; gap:22px; font-size:14.5px; }
.head-nav a { color:var(--text); transition:color .15s; }
.head-nav a:hover { color:var(--primary); }
.head-actions { display:flex; align-items:center; gap:12px; }
.btn { display:inline-flex; align-items:center; justify-content:center; gap:7px; padding:11px 22px; border-radius:12px; font-size:14.5px; font-weight:700; border:1px solid transparent; cursor:pointer; transition:all .15s; }
.btn-big { padding:15px 34px; font-size:16px; border-radius:14px; }
.btn-primary { background:var(--primary); color:#fff; box-shadow:0 8px 24px rgba(47,107,255,.28); }
.btn-primary:hover { background:var(--primary-deep); transform:translateY(-1px); }
.btn-ghost { background:#fff; border-color:var(--line); color:var(--text); }
.btn-ghost:hover { border-color:var(--primary); color:var(--primary); }
.btn-line { background:transparent; border-color:rgba(255,255,255,.5); color:#fff; }
.btn-line:hover { background:rgba(255,255,255,.12); }

/* Hero */
.hero { position:relative; overflow:hidden; background:linear-gradient(150deg,#eaf1ff 0%,#f6f9ff 55%,#ffffff 100%); padding:88px 22px 96px; }
.hero-in { max-width:1180px; margin:0 auto; display:grid; grid-template-columns:1.1fr .9fr; gap:50px; align-items:center; }
.hero h1 { font-size:46px; line-height:1.22; letter-spacing:-.5px; }
.hero h1 b { color:var(--primary); }
.hero p.sub { color:var(--muted); font-size:16px; line-height:1.9; margin:22px 0 34px; max-width:520px; }
.hero-cta { display:flex; gap:14px; align-items:center; flex-wrap:wrap; }
.hero-note { margin-top:18px; color:var(--muted); font-size:13px; }
.hero-visual { display:flex; justify-content:center; }
.hero-card { width:100%; max-width:420px; background:var(--card); border-radius:22px; box-shadow:0 30px 80px rgba(31,60,150,.16); padding:26px; }
.hero-card .row { display:flex; align-items:center; gap:12px; padding:13px 0; border-bottom:1px dashed var(--line); }
.hero-card .row:last-child { border-bottom:0; }
.status-pill { display:inline-flex; align-items:center; gap:6px; font-size:12.5px; font-weight:700; border-radius:20px; padding:4px 12px; }
.pill-ok { background:rgba(31,191,117,.12); color:var(--ok); }
.dot { display:inline-block; width:8px; height:8px; border-radius:50%; }
.dot-ok { background:var(--ok); box-shadow:0 0 0 3px rgba(31,191,117,.2); }

/* 通用区块 */
.section { padding:76px 22px; }
.section-in { max-width:1180px; margin:0 auto; }
.sec-head { text-align:center; max-width:640px; margin:0 auto 46px; }
.sec-head h2 { font-size:30px; letter-spacing:-.3px; }
.sec-head p { color:var(--muted); margin-top:12px; line-height:1.8; font-size:14.5px; }
.reveal { opacity:0; transform:translateY(26px); transition:opacity .7s ease, transform .7s cubic-bezier(.22,.61,.36,1); }
.reveal.show { opacity:1; transform:none; }

/* 优势 */
.adv-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(250px,1fr)); gap:20px; }
.adv { background:var(--card); border-radius:var(--radius); padding:26px; box-shadow:0 10px 30px rgba(31,60,150,.06); }
.adv .ic { width:46px; height:46px; border-radius:13px; background:var(--primary-soft); display:flex; align-items:center; justify-content:center; color:var(--primary); margin-bottom:16px; }
.adv h3 { font-size:16.5px; margin-bottom:8px; }
.adv p { color:var(--muted); font-size:13.5px; line-height:1.8; }

/* 功能 */
.feat-banner { background:linear-gradient(150deg,#1d4fd8 0%,#2f6bff 60%,#4f8bff 100%); border-radius:24px; color:#fff; padding:46px; position:relative; overflow:hidden; }
.feat-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:16px; }
.feat { background:rgba(255,255,255,.1); border:1px solid rgba(255,255,255,.16); border-radius:16px; padding:20px; backdrop-filter:blur(4px); }
.feat h3 { font-size:15px; margin-bottom:7px; display:flex; align-items:center; gap:9px; }
.feat p { font-size:12.5px; opacity:.85; line-height:1.7; }
.feat .ic { width:34px; height:34px; border-radius:10px; background:rgba(255,255,255,.16); display:flex; align-items:center; justify-content:center; margin-bottom:12px; color:#fff; }

/* 小部件 */
.why-card { display:grid; grid-template-columns:repeat(auto-fit,minmax(250px,1fr)); gap:20px; }
.why { background:var(--card); border-radius:var(--radius); box-shadow:0 10px 30px rgba(31,60,150,.06); padding:24px; }
.why b { font-size:15.5px; }

/* 尾部 CTA */
.cta-band { background:var(--card); border-radius:24px; box-shadow:0 20px 60px rgba(31,60,150,.12); padding:54px 34px; text-align:center; }
.cta-band h2 { font-size:28px; }
.cta-band p { color:var(--muted); margin:14px auto 30px; max-width:520px; line-height:1.8; }

/* 底部 */
.foot { border-top:1px solid var(--line); padding:28px 22px; text-align:center; color:var(--muted); font-size:12.5px; background:#fff; }
.foot b { color:var(--text); }

/* 滚动弹起动画中的过渡延迟 */
.d1 { transition-delay:.05s } .d2 { transition-delay:.12s } .d3 { transition-delay:.19s } .d4 { transition-delay:.26s } .d5 { transition-delay:.33s }

/* ============ 移动端适配 ============ */
@media (max-width: 900px) {
  .head-in { padding:11px 16px; flex-wrap:wrap; gap:8px; }
  .head-nav { order:3; width:100%; gap:16px; padding-top:5px; border-top:1px dashed var(--line); justify-content:center; flex-wrap:wrap; }
  .head-logo span { font-size:16px; }
  .head-actions { gap:8px; }
  .head-actions .btn { padding:8px 14px; font-size:13px; }
  .hero { padding:52px 16px 56px; }
  .hero-in { grid-template-columns:1fr; gap:34px; }
  .hero h1 { font-size:30px; }
  .hero p.sub { font-size:15px; }
  .hero-card { max-width:100%; padding:20px; }
  .hero-cta .btn-big { padding:12px 24px; font-size:15px; }
  .section { padding:52px 16px; }
  .sec-head h2 { font-size:24px; }
  .cta-band { padding:36px 18px; }
  .cta-band h2 { font-size:22px; }
}

@media (max-width: 520px) {
  .head-actions .btn { padding:7px 11px; font-size:12.5px; }
  .head-actions .btn-ghost { display:none; }
  .hero h1 { font-size:25px; }
  .hero-card .row { gap:9px; }
  .adv-grid, .why-card { grid-template-columns:1fr; }
  .feat-grid { grid-template-columns:1fr; }
}