:root {
    --primary: rgb(70,139,223);
    --primary-dark: #225fba;
    --primary-soft: #eaf3ff;
    --ink: #102033;
    --muted: #5d6b7d;
    --line: #d9e7f7;
    --card: rgba(255,255,255,.88);
    --bg: #f6faff;
    --shadow: 0 18px 50px rgba(32, 82, 147, .11);
    --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, #f8fbff 0%, #eef6ff 52%, #ffffff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(100% - 32px, 1160px); margin: 0 auto; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,.88);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(217,231,247,.8);
}
.nav-wrap { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .2px; }
.logo img { width: 38px; height: 38px; border-radius: 12px; }
.site-nav { display: none; flex-direction: column; position: absolute; left: 16px; right: 16px; top: 72px; padding: 16px; background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); }
.site-nav a { padding: 10px 12px; border-radius: 12px; color: #33455d; font-weight: 600; }
.site-nav a:hover { background: var(--primary-soft); color: var(--primary-dark); }
.nav-toggle { display: none; }
.nav-toggle:checked ~ .site-nav { display: flex; }
.nav-toggle-label { display: grid; gap: 5px; padding: 10px; border-radius: 12px; background: var(--primary-soft); cursor: pointer; }
.nav-toggle-label span { display: block; width: 22px; height: 2px; background: var(--primary-dark); border-radius: 99px; }
.section { padding: 56px 0; }
.section-title { max-width: 720px; margin-bottom: 24px; }
.section-title.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow, .badge { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 999px; background: var(--primary-soft); color: var(--primary-dark); font-weight: 700; font-size: 13px; }
h1, h2, h3 { margin: 0 0 14px; line-height: 1.25; color: var(--ink); }
h1 { font-size: clamp(32px, 8vw, 58px); letter-spacing: -1.6px; }
h2 { font-size: clamp(25px, 5vw, 38px); letter-spacing: -.8px; }
h3 { font-size: 20px; }
p { margin: 0 0 16px; color: var(--muted); }
.hero { padding: 54px 0 40px; position: relative; }
.hero::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 440px; background: radial-gradient(circle at 20% 10%, rgba(70,139,223,.18), transparent 34%), radial-gradient(circle at 80% 18%, rgba(70,139,223,.12), transparent 30%); pointer-events: none; }
.hero-layout { position: relative; display: grid; gap: 30px; align-items: center; }
.hero-copy { padding-top: 8px; }
.hero-copy p { font-size: 17px; }
.hero-tags, .mini-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 24px; }
.tag { padding: 8px 12px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.76); color: #31506f; font-size: 13px; font-weight: 700; }
.download-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 13px 24px; border-radius: 999px; background: var(--primary); color: #fff; font-weight: 800; box-shadow: 0 12px 26px rgba(70,139,223,.28); border: none; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease; }
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 34px rgba(70,139,223,.34); }
.hero-visual { display: grid; grid-template-columns: 1fr; gap: 16px; position: relative; }
.phone-card { position: relative; padding: 20px; min-height: 440px; border: 1px solid rgba(217,231,247,.9); border-radius: 30px; background: linear-gradient(145deg, rgba(255,255,255,.92), rgba(234,243,255,.84)); box-shadow: var(--shadow); overflow: hidden; }
.app-shot { width: min(78%, 280px); margin: 8px auto 0; border-radius: 28px; box-shadow: 0 24px 55px rgba(25,64,116,.18); }
.status-card, .asset-card, .risk-card { border: 1px solid var(--line); background: rgba(255,255,255,.9); border-radius: 18px; padding: 14px 16px; box-shadow: 0 12px 28px rgba(33,78,134,.09); }
.status-card { position: absolute; left: 16px; top: 22px; width: 190px; }
.asset-card { position: absolute; right: 16px; bottom: 28px; width: 205px; }
.risk-card { margin-top: 0; }
.status-line { display: flex; justify-content: space-between; gap: 10px; font-size: 13px; color: var(--muted); }
.status-dot { width: 10px; height: 10px; background: var(--primary); border-radius: 50%; display: inline-block; box-shadow: 0 0 0 5px rgba(70,139,223,.15); }
.security-strip { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 26px; }
.metric { padding: 18px; border-radius: 18px; background: #fff; border: 1px solid var(--line); box-shadow: 0 8px 24px rgba(38,91,152,.06); }
.metric strong { display: block; margin-bottom: 5px; font-size: 18px; }
.grid, .feature-grid, .category-grid, .scenario-grid, .recommend-grid { display: grid; gap: 16px; }
.feature-grid, .category-grid, .scenario-grid { grid-template-columns: 1fr; }
.card, .category-card, .feature-card, .scenario-card, .faq-item, .note-card, .process-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: 0 12px 32px rgba(34,82,144,.07); }
.category-card, .scenario-card { transition: transform .2s ease, box-shadow .2s ease; }
.category-card:hover, .scenario-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card-link { color: var(--primary-dark); font-weight: 800; }
.steps { display: grid; gap: 14px; counter-reset: step; }
.step { position: relative; padding: 20px 20px 20px 66px; background: #fff; border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 10px 24px rgba(34,82,144,.06); }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 20px; top: 20px; width: 32px; height: 32px; display: grid; place-items: center; border-radius: 12px; background: var(--primary); color: #fff; font-weight: 800; }
.security-layout, .split-layout, .page-layout { display: grid; gap: 22px; align-items: start; }
.security-panel { background: linear-gradient(145deg, #ffffff, #eaf3ff); border: 1px solid var(--line); border-radius: 28px; padding: 24px; box-shadow: var(--shadow); }
.panel-row { display: flex; justify-content: space-between; gap: 14px; padding: 13px 0; border-bottom: 1px solid var(--line); color: var(--muted); }
.panel-row:last-child { border-bottom: 0; }
.panel-row strong { color: var(--ink); }
.cta-section { margin: 34px 0 0; padding: 34px 20px; text-align: center; border-radius: 30px; background: linear-gradient(135deg, rgba(70,139,223,.14), rgba(255,255,255,.94)); border: 1px solid var(--line); box-shadow: var(--shadow); }
.page-hero { padding: 52px 0 18px; }
.page-hero .container { display: grid; gap: 18px; }
.content-body { max-width: 820px; }
.article-panel { background: #fff; border: 1px solid var(--line); border-radius: 28px; padding: 24px; box-shadow: var(--shadow); }
.check-list, .plain-list { margin: 0; padding-left: 0; list-style: none; display: grid; gap: 10px; }
.check-list li, .plain-list li { position: relative; padding-left: 30px; color: var(--muted); }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--primary-dark); font-weight: 900; }
.plain-list li::before { content: "•"; position: absolute; left: 8px; top: 0; color: var(--primary); font-weight: 900; }
.faq-list { display: grid; gap: 14px; }
.faq-item h3 { margin-bottom: 8px; }
.download-single { display: flex; justify-content: center; margin: 28px 0; }
.table-like { display: grid; gap: 12px; }
.table-row { display: grid; gap: 8px; padding: 16px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.table-row strong { color: var(--ink); }
.site-footer { margin-top: 42px; padding: 44px 0 22px; background: #102033; color: #fff; }
.site-footer p, .site-footer a { color: rgba(255,255,255,.72); }
.footer-grid { display: grid; gap: 24px; }
.footer-grid a { display: block; margin: 8px 0; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-brand img { width: 34px; height: 34px; border-radius: 10px; }
.footer-bottom { margin-top: 26px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.58); font-size: 13px; }
@media (min-width: 640px) {
    .category-grid, .feature-grid, .scenario-grid, .recommend-grid { grid-template-columns: repeat(2, 1fr); }
    .security-strip { grid-template-columns: repeat(2, 1fr); }
    .table-row { grid-template-columns: 180px 1fr; }
}
@media (min-width: 920px) {
    .nav-toggle-label { display: none; }
    .site-nav { display: flex; position: static; flex-direction: row; align-items: center; padding: 0; border: 0; box-shadow: none; background: transparent; }
    .hero { padding: 78px 0 52px; }
    .hero-layout { grid-template-columns: 1.05fr .95fr; gap: 46px; }
    .hero-copy p { font-size: 18px; max-width: 650px; }
    .category-grid, .feature-grid, .scenario-grid { grid-template-columns: repeat(3, 1fr); }
    .recommend-grid { grid-template-columns: repeat(4, 1fr); }
    .steps { grid-template-columns: repeat(3, 1fr); }
    .security-layout, .split-layout, .page-layout { grid-template-columns: 1.05fr .95fr; gap: 34px; }
    .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; }
    .security-strip { grid-template-columns: repeat(4, 1fr); }
    .phone-card { min-height: 500px; }
}
@media (max-width: 420px) {
    .container { width: min(100% - 24px, 1160px); }
    .phone-card { min-height: 420px; padding: 16px; }
    .status-card, .asset-card { position: static; width: auto; margin-bottom: 12px; }
    .app-shot { width: min(82%, 250px); }
    .download-btn { width: 100%; }
    .hero-tags .tag, .mini-tags .tag { font-size: 12px; }
}