:root {
    --primary: rgb(70,139,223);
    --primary-dark: #2765af;
    --primary-soft: #edf6ff;
    --ink: #102033;
    --muted: #617086;
    --line: #dce8f7;
    --card: rgba(255, 255, 255, .86);
    --shadow: 0 18px 45px rgba(43, 104, 175, .12);
    --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:
        radial-gradient(circle at top left, rgba(70,139,223,.18), transparent 34rem),
        linear-gradient(180deg, #f4f9ff 0%, #ffffff 42%, #f6f9fd 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,.84);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(220,232,247,.8);
}
.nav-wrap { min-height: 72px; 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: .02em; color: #16375f; }
.logo img { width: 38px; height: 38px; border-radius: 12px; box-shadow: 0 8px 20px rgba(70,139,223,.22); }
.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }
.nav-toggle-label { width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 14px; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 5px; background: #fff; }
.nav-toggle-label span { width: 18px; height: 2px; background: #29415d; border-radius: 10px; }
.site-nav { display: none; position: absolute; left: 16px; right: 16px; top: 74px; background: #fff; border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); padding: 12px; }
.site-nav a { display: block; padding: 12px 14px; color: #2a415c; border-radius: 12px; font-weight: 650; }
.site-nav a:hover { background: var(--primary-soft); color: var(--primary-dark); }
.nav-toggle:checked ~ .site-nav { display: block; }
.section { padding: 58px 0; }
.section-sm { padding: 38px 0; }
.eyebrow, .badge { display: inline-flex; align-items: center; gap: 8px; padding: 7px 12px; background: #eaf4ff; color: var(--primary-dark); border: 1px solid #d5e9ff; border-radius: 999px; font-size: 13px; font-weight: 760; }
.hero { padding: 52px 0 42px; }
.hero-layout { display: grid; grid-template-columns: 1fr; gap: 28px; align-items: center; }
h1 { font-size: clamp(34px, 9vw, 62px); line-height: 1.08; margin: 16px 0 18px; letter-spacing: -.045em; }
h2 { font-size: clamp(26px, 5vw, 40px); line-height: 1.22; margin: 0 0 16px; letter-spacing: -.026em; }
h3 { font-size: 19px; margin: 0 0 8px; }
p { margin: 0 0 16px; color: var(--muted); }
.lead { font-size: 18px; color: #465a73; max-width: 700px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-top: 24px; }
.download-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-height: 48px;
    padding: 0 26px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--primary), #5aa7f2);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(70,139,223,.26);
    border: 1px solid rgba(255,255,255,.6);
    cursor: pointer;
}
.download-btn:hover { transform: translateY(-1px); box-shadow: 0 18px 34px rgba(70,139,223,.32); }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.hero-tags span, .mini-tag { padding: 8px 11px; border-radius: 999px; background: rgba(255,255,255,.78); border: 1px solid var(--line); color: #49627e; font-size: 13px; font-weight: 700; }
.product-visual { position: relative; padding: 18px; border-radius: 32px; background: linear-gradient(145deg, rgba(255,255,255,.9), rgba(235,246,255,.86)); border: 1px solid rgba(211,230,250,.9); box-shadow: var(--shadow); overflow: hidden; }
.product-visual:before { content: ""; position: absolute; width: 220px; height: 220px; right: -70px; top: -60px; background: rgba(70,139,223,.16); border-radius: 50%; }
.app-frame { position: relative; z-index: 1; display: grid; place-items: center; min-height: 420px; }
.app-frame img { width: min(265px, 78%); filter: drop-shadow(0 24px 36px rgba(33,78,132,.25)); }
.status-card { position: absolute; left: 18px; top: 28px; z-index: 2; width: 180px; background: rgba(255,255,255,.9); border: 1px solid #dceafd; border-radius: 18px; padding: 14px; box-shadow: 0 14px 30px rgba(47,99,161,.14); }
.status-dot { width: 10px; height: 10px; border-radius: 50%; background: #37b26c; display: inline-block; margin-right: 8px; }
.visual-labels { position: absolute; right: 18px; bottom: 18px; z-index: 2; display: grid; gap: 9px; }
.visual-labels span { background: rgba(255,255,255,.92); border: 1px solid #dceafd; color: #234666; border-radius: 14px; padding: 9px 12px; font-size: 13px; font-weight: 760; box-shadow: 0 12px 20px rgba(47,99,161,.1); }
.trust-grid, .category-grid, .feature-grid, .scenario-grid, .info-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.trust-card, .category-card, .feature-card, .scenario-card, .info-card, .content-card, .faq-item, .notice-card {
    background: var(--card);
    border: 1px solid rgba(215,229,246,.95);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 10px 28px rgba(43,104,175,.08);
}
.trust-card strong { display: block; font-size: 19px; color: #183a61; margin-bottom: 4px; }
.category-card { transition: transform .2s ease, box-shadow .2s ease; }
.category-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.category-card .arrow { color: var(--primary-dark); font-weight: 850; }
.section-head { max-width: 760px; margin-bottom: 24px; }
.security-layout { display: grid; gap: 22px; align-items: center; }
.security-panel { background: linear-gradient(145deg, #ffffff, #eef7ff); border: 1px solid #d7e8fb; border-radius: 28px; padding: 24px; box-shadow: var(--shadow); }
.security-list, .check-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.security-list li, .check-list li { display: flex; gap: 10px; align-items: flex-start; color: #3d526c; }
.security-list li:before, .check-list li:before { content: "✓"; flex: 0 0 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; color: #fff; background: var(--primary); font-size: 13px; font-weight: 900; }
.steps { counter-reset: step; display: grid; grid-template-columns: 1fr; gap: 14px; }
.step { position: relative; background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 22px; box-shadow: 0 8px 22px rgba(43,104,175,.07); }
.step:before { counter-increment: step; content: counter(step); display: grid; place-items: center; width: 36px; height: 36px; border-radius: 12px; background: var(--primary); color: #fff; font-weight: 900; margin-bottom: 14px; }
.cta-section { text-align: center; border-radius: 30px; padding: 38px 22px; background: linear-gradient(135deg, #eaf5ff, #ffffff 58%, #eef8ff); border: 1px solid #d8eafa; box-shadow: var(--shadow); }
.page-hero { padding: 48px 0 26px; }
.page-layout { display: grid; gap: 20px; align-items: start; }
.article-body { background: rgba(255,255,255,.82); border: 1px solid var(--line); border-radius: 28px; padding: 24px; box-shadow: 0 14px 32px rgba(43,104,175,.08); }
.article-body h2 { font-size: 25px; margin-top: 24px; }
.article-side { display: grid; gap: 16px; }
.faq-list { display: grid; gap: 16px; }
.faq-item h3 { color: #173b62; }
.kpi { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.kpi:last-child { border-bottom: 0; }
.kpi span { color: var(--muted); }
.kpi strong { color: var(--primary-dark); }
.table-like { display: grid; gap: 10px; }
.table-like div { display: grid; gap: 4px; background: #f7fbff; border: 1px solid #dcecff; border-radius: 16px; padding: 14px; }
.inline-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.inline-links a { padding: 9px 12px; border-radius: 999px; background: #fff; border: 1px solid var(--line); color: #2a5f9a; font-weight: 750; font-size: 14px; }
.site-footer { margin-top: 48px; padding: 44px 0 24px; background: #10233a; color: rgba(255,255,255,.82); }
.site-footer p, .site-footer a, .site-footer span { color: rgba(255,255,255,.72); }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
.footer-logo { font-size: 22px; font-weight: 900; color: #fff; margin-bottom: 10px; }
.site-footer h3 { color: #fff; font-size: 16px; }
.site-footer a { display: block; margin: 7px 0; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 28px; padding-top: 18px; display: flex; flex-direction: column; gap: 8px; font-size: 13px; }
@media (min-width: 640px) {
    .container { width: min(1120px, calc(100% - 48px)); }
    .category-grid, .feature-grid, .trust-grid, .scenario-grid, .info-grid { grid-template-columns: repeat(2, 1fr); }
    .hero { padding-top: 68px; }
}
@media (min-width: 920px) {
    .nav-toggle-label { display: none; }
    .site-nav { position: static; display: flex; align-items: center; gap: 4px; box-shadow: none; border: 0; padding: 0; background: transparent; }
    .site-nav a { padding: 10px 13px; }
    .hero-layout { grid-template-columns: minmax(0, 1.02fr) minmax(390px, .98fr); gap: 48px; }
    .hero { padding: 86px 0 64px; }
    .trust-grid { grid-template-columns: repeat(4, 1fr); }
    .category-grid, .feature-grid, .scenario-grid { grid-template-columns: repeat(3, 1fr); }
    .security-layout { grid-template-columns: 1fr .92fr; }
    .steps { grid-template-columns: repeat(4, 1fr); }
    .page-layout { grid-template-columns: minmax(0, 1fr) 330px; }
    .article-body { padding: 34px; }
    .footer-grid { grid-template-columns: 1.2fr .8fr .8fr .8fr; }
    .footer-bottom { flex-direction: row; justify-content: space-between; align-items: center; }
}