:root {
    --ink: #111827;
    --navy: #172554;
    --blue: #2563eb;
    --coral: #f05d4f;
    --mint: #35c7a7;
    --paper: #fffdf8;
    --line: #dbe4ef;
    --muted: #607089;
    --shadow: 0 18px 45px rgba(23, 37, 84, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background: var(--paper);
    line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
.site-header {
    position: sticky; top: 0; z-index: 20;
    background: rgba(255, 253, 248, .96);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(10px);
}
.nav-wrap { max-width: 1160px; margin: auto; min-height: 72px; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: 0; color: var(--navy); }
.brand img { width: 42px; height: 42px; object-fit: contain; }
.brand span { font-size: 19px; }
nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
nav a { padding: 8px 13px; border-radius: 6px; color: var(--muted); font-size: 14px; }
nav a:hover, nav a[aria-current="page"] { color: var(--navy); background: #eaf1ff; }
.nav-download, .button-primary { background: var(--coral); color: #fff; font-weight: 700; border-radius: 6px; box-shadow: 0 7px 0 #c64339; transition: transform .18s, box-shadow .18s; }
.nav-download { padding: 9px 16px; }
.nav-download:hover, .button-primary:hover { transform: translateY(2px); box-shadow: 0 4px 0 #c64339; }
.hero { background: var(--navy); color: #fff; position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; inset: 0; opacity: .14; background-image: radial-gradient(#fff 1px, transparent 1px); background-size: 13px 13px; pointer-events: none; }
.hero-inner { max-width: 1160px; margin: auto; min-height: 510px; padding: 88px 24px 76px; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr); align-items: center; gap: 60px; position: relative; z-index: 1; }
.eyebrow { color: var(--mint); font-size: 13px; letter-spacing: 2px; text-transform: uppercase; font-weight: 800; }
h1 { font-size: clamp(34px, 5vw, 60px); line-height: 1.12; margin: 12px 0 18px; letter-spacing: 0; }
.hero-copy { max-width: 590px; color: #dce6ff; font-size: 17px; }
.hero-actions { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-top: 30px; }
.button-primary { display: inline-flex; align-items: center; gap: 9px; padding: 13px 22px; }
.button-ghost { border: 1px solid #91a9d8; color: #fff; border-radius: 6px; padding: 11px 18px; }
.hero-meta { display: flex; gap: 25px; flex-wrap: wrap; margin-top: 32px; color: #b7c8eb; font-size: 13px; }
.hero-meta strong { display: block; color: #fff; font-size: 22px; line-height: 1.2; }
.phone-stack { display: flex; justify-content: center; position: relative; min-height: 340px; }
.phone { width: min(228px, 70vw); background: #08132f; border: 7px solid #e3ebff; border-radius: 27px; padding: 8px; box-shadow: 17px 20px 0 rgba(0,0,0,.24), var(--shadow); transform: rotate(6deg); }
.phone.back { position: absolute; width: min(205px, 60vw); transform: rotate(-10deg) translate(-95px, 28px); opacity: .73; }
.phone img { display: block; width: 100%; height: auto; border-radius: 16px; }
.section { max-width: 1160px; margin: auto; padding: 82px 24px; }
.section-kicker { color: var(--coral); font-weight: 800; font-size: 13px; letter-spacing: 1.5px; text-transform: uppercase; }
h2 { font-size: clamp(27px, 3.6vw, 40px); line-height: 1.2; margin: 8px 0 30px; color: var(--navy); }
h3 { color: var(--navy); line-height: 1.3; margin: 0 0 9px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 17px; }
.feature { border: 1px solid var(--line); border-radius: 8px; padding: 24px 20px; background: #fff; box-shadow: 0 8px 24px rgba(23,37,84,.05); }
.feature-mark { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; margin-bottom: 18px; background: #eaf1ff; color: var(--blue); font-weight: 800; }
.feature:nth-child(2) .feature-mark { background: #fff0ec; color: var(--coral); }
.feature:nth-child(3) .feature-mark { background: #e8fbf5; color: #159a7d; }
.feature:nth-child(4) .feature-mark { background: #fff7db; color: #9d7211; }
.feature p, .article p, .article li { color: var(--muted); }
.split { display: grid; grid-template-columns: .9fr 1.1fr; align-items: start; gap: 70px; }
.poster { border-radius: 8px; border: 1px solid var(--line); background: #fff; padding: 14px; box-shadow: var(--shadow); }
.poster img { width: 100%; max-width: 400px; display: block; margin: auto; border-radius: 5px; }
.check-list { display: grid; gap: 17px; margin: 0; padding: 0; list-style: none; }
.check-list li { display: grid; grid-template-columns: 28px 1fr; gap: 12px; align-items: start; color: var(--muted); }
.check-list b { color: var(--navy); display: block; }
.check { width: 25px; height: 25px; border-radius: 5px; background: var(--mint); color: #fff; display: grid; place-items: center; font-size: 14px; font-weight: 900; }
.band { background: #eef4ff; }
.route-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.route { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 24px; min-height: 160px; position: relative; }
.route a { color: var(--blue); font-weight: 700; }
.route .arrow { position: absolute; right: 22px; bottom: 18px; color: var(--coral); font-size: 20px; }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
blockquote { margin: 0; padding: 22px; border-left: 4px solid var(--coral); background: #fff; border-radius: 0 8px 8px 0; color: var(--navy); }
cite { display: block; margin-top: 14px; color: var(--muted); font-size: 13px; font-style: normal; }
.article { max-width: 840px; margin: auto; }
.article h1 { color: var(--navy); font-size: clamp(34px, 5vw, 52px); }
.article h2 { margin-top: 45px; font-size: 30px; }
.article ul, .article ol { padding-left: 23px; }
.step-list { counter-reset: steps; list-style: none; padding: 0 !important; display: grid; gap: 18px; }
.step-list li { counter-increment: steps; display: grid; grid-template-columns: 42px 1fr; gap: 15px; align-items: start; border-bottom: 1px solid var(--line); padding-bottom: 18px; }
.step-list li::before { content: counter(steps, decimal-leading-zero); color: #fff; background: var(--blue); border-radius: 6px; padding: 5px 6px; text-align: center; font-weight: 800; }
.faq { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); padding: 18px 0; }
summary { cursor: pointer; color: var(--navy); font-weight: 700; padding-right: 24px; }
details p { margin: 12px 0 3px; color: var(--muted); }
.cta { background: var(--coral); color: #fff; }
.cta-inner { max-width: 1160px; margin: auto; padding: 52px 24px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.cta h2 { color: #fff; margin: 0; }
.cta .button-primary { background: #fff; color: var(--navy); box-shadow: 0 7px 0 #b83f36; }
.site-footer { background: #0c1633; color: #b9c8e8; padding: 38px 24px; font-size: 13px; }
.footer-inner { max-width: 1160px; margin: auto; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.footer-brand { color: #fff; font-weight: 800; font-size: 17px; }
.disclaimer { grid-column: 1 / -1; border-top: 1px solid #26365d; padding-top: 18px; }
.note { background: #fff8df; border: 1px solid #f1df9e; border-radius: 6px; padding: 13px 16px; color: #735b17; }
@media (max-width: 850px) {
    .hero-inner, .split { grid-template-columns: 1fr; gap: 35px; }
    .hero-inner { padding-top: 64px; }
    .phone-stack { min-height: 290px; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .nav-wrap { min-height: 64px; padding: 0 16px; }
    .brand span { font-size: 16px; }
    .brand img { width: 36px; height: 36px; }
    nav { gap: 2px; }
    nav a { padding: 7px 8px; font-size: 13px; }
    .nav-download { display: none; }
    .section { padding: 57px 18px; }
    .feature-grid, .route-grid, .quote-grid { grid-template-columns: 1fr; }
    .cta-inner, .footer-inner { grid-template-columns: 1fr; display: grid; }
    .cta-inner { padding: 38px 18px; }
}