:root{
    --blue:#8fd3ff;
    --blue-deep:#2b86b8;
    --cream:#fff2c7;
    --orange:#ffb36b;
    --orange-soft:#ffe0bd;
    --white:#ffffff;
    --ink:#243447;
    --muted:#5d7083;
    --line:#e7f2f8;
    --shadow:0 18px 42px rgba(64,119,150,.14);
    --radius:28px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;
    color:var(--ink);
    background:linear-gradient(180deg,#f5fbff 0%,#fffaf0 44%,#ffffff 100%);
    line-height:1.75;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.topbar{max-width:1180px;margin:0 auto;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#244056}
.brand-mark{width:44px;height:44px;border-radius:16px;background:linear-gradient(135deg,var(--blue),var(--cream));display:grid;place-items:center;box-shadow:var(--shadow);color:#1d668e}
.brand-text{font-size:22px;letter-spacing:.5px}
.main-nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.main-nav a{padding:9px 13px;border-radius:999px;color:#385268;font-weight:700;font-size:15px}
.main-nav a.active,.main-nav a:hover{background:#eaf7ff;color:#1b759f}
.nav-toggle{display:none;border:0;background:#eaf7ff;border-radius:14px;width:44px;height:40px;padding:10px;cursor:pointer}
.nav-toggle span{display:block;height:2px;background:#2b6f92;margin:5px 0;border-radius:2px}
main{overflow:hidden}
.section{max-width:1180px;margin:0 auto;padding:72px 22px}
.hero{max-width:1180px;margin:0 auto;padding:72px 22px 46px;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.kicker{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;background:#fff6d7;border:1px solid #ffe4a0;border-radius:999px;color:#8a5a00;font-weight:800;font-size:14px}
h1,h2,h3{line-height:1.25;margin:0;color:#21384d}
h1{font-size:clamp(34px,5vw,60px);letter-spacing:-1.2px;margin-top:18px}
h2{font-size:clamp(28px,3.5vw,42px);margin-bottom:16px}
h3{font-size:22px;margin-bottom:10px}
p{margin:0 0 16px;color:var(--muted)}
.lead{font-size:18px;color:#4d6578;margin-top:20px;max-width:680px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 20px;border-radius:999px;font-weight:800;border:1px solid transparent;transition:.2s transform,.2s box-shadow,.2s background}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 24px rgba(43,134,184,.16)}
.btn-primary{background:linear-gradient(135deg,#61c4f9,#ffd084);color:#1d4054}
.btn-light{background:#ffffff;color:#2b6f92;border-color:#d6edf8}
.hero-visual{position:relative}
.hero-visual::before{content:"";position:absolute;inset:8% -3% -4% 10%;background:#fff0bc;border-radius:38px;filter:blur(0);z-index:-1;transform:rotate(-3deg)}
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:rgba(255,255,255,.88);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.card.soft{background:linear-gradient(180deg,#ffffff,#fff9e9)}
.card.blue{background:linear-gradient(180deg,#f0fbff,#ffffff)}
.card.orange{background:linear-gradient(180deg,#fff7ed,#ffffff)}
.card img{border-radius:22px;margin-bottom:18px;background:#f5fbff}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 14px}
.tag{display:inline-flex;padding:6px 10px;background:#eaf7ff;color:#287294;border-radius:999px;font-size:13px;font-weight:800}
.tag.orange{background:#fff0df;color:#a05a14}
.tag.cream{background:#fff6d7;color:#8a6407}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
.section-head p{max-width:660px}
.band{background:linear-gradient(135deg,#eaf7ff,#fff8df);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.timeline{display:grid;gap:18px}
.step{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:flex-start}
.step-num{width:42px;height:42px;border-radius:16px;background:#ffcf8a;display:grid;place-items:center;font-weight:900;color:#6a3b00}
.list-check{padding:0;margin:0;list-style:none;display:grid;gap:11px}
.list-check li{position:relative;padding-left:30px;color:#4c6476}
.list-check li::before{content:"✓";position:absolute;left:0;top:0;width:22px;height:22px;border-radius:9px;background:#dff5ff;color:#1a779e;display:grid;place-items:center;font-weight:900;font-size:13px}
.notice{padding:18px 20px;border-radius:22px;background:#fff8dd;border:1px solid #ffe5a6;color:#6b520d}
.feature-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:24px}
.feature-pill{padding:16px;border-radius:22px;background:#fff;border:1px solid var(--line);font-weight:800;color:#31526a;text-align:center}
.video-card{position:relative;overflow:hidden;padding:0}
.video-card .video-body{padding:22px}
.play-badge{position:absolute;left:20px;top:20px;width:52px;height:52px;border-radius:50%;background:rgba(255,255,255,.9);display:grid;place-items:center;color:#2b86b8;font-weight:900;box-shadow:var(--shadow)}
.feedback{display:grid;grid-template-columns:72px 1fr;gap:18px;align-items:start}
.avatar{width:72px;height:72px;border-radius:26px;background:#eaf7ff;padding:6px}
.form{display:grid;gap:14px}
.form label{font-weight:800;color:#31526a}
.form input,.form textarea,.form select{width:100%;border:1px solid #d7ecf7;border-radius:18px;padding:13px 15px;background:#fff;color:#243447;font:inherit}
.form textarea{min-height:140px;resize:vertical}
.inline-domain{font-weight:900;color:#1c779f;background:#eaf7ff;border-radius:12px;padding:2px 8px}
.accordion{display:grid;gap:14px}
details{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px 20px;box-shadow:0 10px 26px rgba(64,119,150,.08)}
summary{font-weight:900;color:#29475d;cursor:pointer}
details p{margin-top:12px;margin-bottom:0}
.site-footer{background:#244056;color:#eef9ff;margin-top:40px}
.site-footer .footer-grid{max-width:1180px;margin:0 auto;padding:36px 22px;display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:26px}
.site-footer p,.site-footer a{color:#d5edf8}.site-footer strong{display:block;margin-bottom:10px;color:#fff;font-size:18px}
.page-hero{max-width:1180px;margin:0 auto;padding:66px 22px 40px;display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:center}
.page-hero h1{font-size:clamp(32px,4vw,52px)}
.mini-stat{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px}
.mini-stat div{background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px;text-align:center;box-shadow:0 10px 22px rgba(64,119,150,.08)}
.mini-stat strong{font-size:24px;color:#1f7fae;display:block}
.table-like{display:grid;gap:12px}
.table-row{display:grid;grid-template-columns:1fr 1.3fr 1fr;gap:12px;align-items:center;padding:16px;border-radius:20px;background:#fff;border:1px solid var(--line)}
.table-row strong{color:#2d4f68}
@media (max-width:900px){
    .hero,.page-hero,.grid-2{grid-template-columns:1fr}.grid-3,.grid-4,.feature-strip{grid-template-columns:repeat(2,1fr)}
    .section{padding:56px 18px}.section-head{display:block}.site-footer .footer-grid{grid-template-columns:1fr}.main-nav{display:none;position:absolute;left:14px;right:14px;top:72px;background:#fff;border:1px solid var(--line);border-radius:24px;padding:14px;box-shadow:var(--shadow)}
    .main-nav.open{display:grid;grid-template-columns:1fr 1fr}.nav-toggle{display:block}.topbar{position:relative}.mini-stat{grid-template-columns:1fr 1fr 1fr}
}
@media (max-width:620px){
    .grid-3,.grid-4,.feature-strip,.mini-stat{grid-template-columns:1fr}.hero{padding-top:46px}.card{padding:20px}.table-row{grid-template-columns:1fr}.feedback{grid-template-columns:1fr}.main-nav.open{grid-template-columns:1fr}
}