:root {
    --ink: #17243b;
    --ink-soft: #536178;
    --orange: #f06a3b;
    --orange-deep: #c94c27;
    --yellow: #ffc857;
    --cream: #fff8ed;
    --paper: #ffffff;
    --line: #eadfce;
    --teal: #2d7e7a;
    --shadow: 0 18px 45px rgba(45, 36, 24, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--cream);
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 248, 237, 0.94);
    border-bottom: 1px solid rgba(234, 223, 206, 0.9);
    backdrop-filter: blur(14px);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; font-size: 19px; letter-spacing: 0; }
.brand img { width: 42px; height: 42px; border-radius: 12px; }
.nav-links { display: flex; align-items: center; gap: 20px; font-size: 14px; color: var(--ink-soft); }
.nav-links a { padding: 8px 2px; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--orange-deep); border-color: var(--orange); }
.nav-download { display: inline-flex; align-items: center; gap: 8px; padding: 11px 16px; border-radius: 10px; background: var(--ink); color: #fff; font-weight: 700; font-size: 14px; }
.nav-download:hover { background: var(--orange-deep); }
.hero { padding: 74px 0 62px; background: radial-gradient(circle at 84% 22%, rgba(255, 200, 87, 0.35), transparent 30%), linear-gradient(135deg, #fff8ed 0%, #fff0dc 55%, #fce3d3 100%); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; align-items: center; gap: 62px; }
.eyebrow { margin: 0 0 14px; color: var(--orange-deep); font-weight: 800; font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.25; margin: 0; letter-spacing: 0; }
h1 { font-size: clamp(36px, 5vw, 64px); max-width: 8em; }
.hero-copy { margin: 22px 0 26px; max-width: 590px; color: var(--ink-soft); font-size: 17px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 20px; border-radius: 10px; border: 1px solid transparent; font-weight: 800; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(23, 36, 59, .16); }
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:hover { background: var(--orange-deep); }
.btn-quiet { border-color: var(--line); background: rgba(255, 255, 255, .68); color: var(--ink); }
.hero-meta { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 24px; color: var(--ink-soft); font-size: 13px; }
.hero-meta strong { color: var(--ink); display: block; font-size: 20px; }
.device-stack { position: relative; min-height: 520px; }
.device-card { position: absolute; width: min(215px, 46%); border: 8px solid #19243a; border-radius: 26px; background: #17243b; box-shadow: var(--shadow); overflow: hidden; }
.device-card img { width: 100%; aspect-ratio: 320 / 705; height: auto; object-fit: cover; }
.device-card.one { top: 4px; right: 3%; transform: rotate(5deg); }
.device-card.two { bottom: 4px; left: 3%; transform: rotate(-5deg); }
.section { padding: 78px 0; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.section-heading h2 { font-size: clamp(28px, 4vw, 42px); }
.section-heading p { margin: 0; max-width: 520px; color: var(--ink-soft); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-card { padding: 24px; background: var(--paper); border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 8px 24px rgba(65, 48, 28, .05); }
.feature-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 12px; background: #fff0d3; color: var(--orange-deep); font-size: 21px; margin-bottom: 18px; }
.feature-card h3 { font-size: 19px; margin-bottom: 10px; }
.feature-card p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.ink-band { background: var(--ink); color: #fff; }
.ink-band .section-heading p, .ink-band .muted { color: #bdc7d6; }
.screens-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; align-items: end; }
.screen-item { text-align: center; }
.screen-item img { width: min(100%, 260px); max-width: 400px; margin: 0 auto 16px; border: 7px solid #101b2e; border-radius: 22px; box-shadow: 0 14px 30px rgba(0,0,0,.22); }
.screen-item h3 { font-size: 17px; }
.screen-item p { margin: 7px auto 0; max-width: 250px; color: #bdc7d6; font-size: 13px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 28px; }
.stat { padding: 18px; border-left: 3px solid var(--yellow); background: rgba(255,255,255,.06); }
.stat strong { display: block; font-size: 28px; color: var(--yellow); }
.stat span { color: #d5dce7; font-size: 13px; }
.path-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.path-card { padding: 28px; border: 1px solid var(--line); background: #fffdf9; border-radius: 14px; }
.path-card h3 { margin-bottom: 12px; }
.path-card p { margin: 0 0 18px; color: var(--ink-soft); font-size: 14px; }
.link-arrow { color: var(--orange-deep); font-weight: 800; font-size: 14px; }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.quote { padding: 24px; border-radius: 14px; background: #fff; border: 1px solid var(--line); }
.quote p { margin: 0 0 15px; font-size: 15px; }
.quote cite { font-style: normal; color: var(--ink-soft); font-size: 13px; }
.faq-list { display: grid; gap: 10px; }
details { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 17px 20px; }
summary { cursor: pointer; font-weight: 800; }
details p { margin: 12px 0 0; color: var(--ink-soft); }
.page-hero { padding: 58px 0 48px; background: linear-gradient(125deg, #fff0dc, #fff8ed 52%, #e8f2ef); }
.page-hero h1 { max-width: none; font-size: clamp(34px, 5vw, 54px); }
.page-hero p { max-width: 700px; margin: 17px 0 0; color: var(--ink-soft); font-size: 16px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 32px; align-items: start; }
.article { padding: 34px; border: 1px solid var(--line); background: #fffdf9; border-radius: 14px; }
.article h2 { margin: 30px 0 13px; font-size: 25px; }
.article h2:first-child { margin-top: 0; }
.article h3 { margin: 22px 0 8px; font-size: 18px; }
.article p { margin: 0 0 15px; color: #39465c; }
.article ul, .article ol { margin: 0 0 18px; padding-left: 24px; color: #39465c; }
.article li { margin: 6px 0; }
.side-nav { position: sticky; top: 102px; padding: 20px; border: 1px solid var(--line); background: #fff; border-radius: 12px; }
.side-nav strong { display: block; margin-bottom: 10px; }
.side-nav a { display: block; padding: 7px 0; color: var(--ink-soft); font-size: 14px; }
.side-nav a:hover { color: var(--orange-deep); }
.notice { margin-top: 22px; padding: 14px 16px; border-left: 4px solid var(--teal); background: #eaf5f2; color: #2a5551; font-size: 13px; }
.site-footer { padding: 38px 0 24px; background: #111b2f; color: #dce2eb; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 30px; }
.site-footer .brand { color: #fff; }
.site-footer p { margin: 12px 0 0; color: #9faabd; font-size: 13px; }
.site-footer h3 { margin-bottom: 10px; color: #fff; font-size: 15px; }
.site-footer a { display: block; color: #b7c1d0; font-size: 13px; margin: 6px 0; }
.disclaimer { margin-top: 26px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.13); color: #9faabd; font-size: 12px; }
.copyright { margin-top: 10px; color: #7e8aa0; font-size: 12px; }
.mobile-toggle { display: none; border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 7px 10px; font-size: 18px; }
@media (max-width: 880px) {
    .nav-links { gap: 12px; }
    .hero-grid, .article-layout { grid-template-columns: 1fr; }
    .device-stack { min-height: 500px; max-width: 500px; margin: 0 auto; width: 100%; }
    .side-nav { position: static; }
    .feature-grid, .quote-grid, .screens-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
    .container { width: min(100% - 28px, 1120px); }
    .nav-wrap { min-height: 66px; }
    .mobile-toggle { display: inline-block; }
    .nav-links { display: none; position: absolute; left: 14px; right: 14px; top: 70px; padding: 12px; background: #fff8ed; border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); }
    .nav-links.is-open { display: grid; }
    .nav-download { display: none; }
    .hero { padding-top: 48px; }
    .hero-copy { font-size: 15px; }
    .device-stack { min-height: 430px; }
    .device-card { width: 170px; border-width: 7px; border-radius: 22px; }
    .feature-grid, .screens-grid, .quote-grid, .stats, .path-grid, .footer-grid { grid-template-columns: 1fr; }
    .section { padding: 58px 0; }
    .section-heading { display: block; }
    .section-heading p { margin-top: 12px; }
    .article { padding: 22px; }
}