:root {
    --primary: rgb(70,139,223);
    --primary-soft: rgba(70,139,223,.12);
    --primary-light: rgba(70,139,223,.08);
    --ink: #13223a;
    --muted: #607089;
    --line: #dfe9f5;
    --panel: #ffffff;
    --bg: #f5f9ff;
    --deep: #0f2442;
    --radius: 22px;
    --shadow: 0 18px 45px rgba(42, 92, 156, .12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, #f7fbff 0%, #ffffff 38%, #f4f8fd 100%);
    line-height: 1.78;
    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; }
.section { padding: 58px 0; }
.section-tight { padding: 38px 0; }
.eyebrow, .category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .03em;
}
.section-head { margin-bottom: 26px; }
.section-head h2, .page-title h1 { margin: 12px 0 10px; line-height: 1.18; letter-spacing: -.04em; }
.section-head h2 { font-size: clamp(28px, 5vw, 46px); }
.section-head p, .page-title p { color: var(--muted); max-width: 760px; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(255,255,255,.88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(223,233,245,.78);
}
.nav-wrap { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; }
.brand-logo { width: 40px; height: 40px; border-radius: 12px; }
.brand-name { font-size: 18px; letter-spacing: -.02em; }
.nav-toggle { display: none; }
.nav-toggle-label { width: 42px; height: 42px; display: inline-flex; flex-direction: column; justify-content: center; gap: 6px; padding: 10px; border: 1px solid var(--line); border-radius: 14px; }
.nav-toggle-label span { height: 2px; width: 100%; background: var(--deep); border-radius: 4px; }
.main-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 78px;
    display: none;
    flex-direction: column;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}
.nav-toggle:checked ~ .main-nav { display: flex; }
.main-nav a { padding: 12px 14px; border-radius: 12px; color: #52627a; font-size: 15px; }
.main-nav a.active, .main-nav a:hover { background: var(--primary-light); color: var(--primary); }
.hero-layout {
    padding: 48px 0 40px;
    background: radial-gradient(circle at top right, rgba(70,139,223,.18), transparent 32%), linear-gradient(135deg, #ffffff 0%, #eef6ff 100%);
}
.hero-grid { display: grid; gap: 34px; align-items: center; }
.hero-copy h1 { font-size: clamp(38px, 9vw, 70px); line-height: 1.02; margin: 14px 0 18px; letter-spacing: -.06em; }
.hero-copy p { color: var(--muted); font-size: 17px; max-width: 620px; }
.hero-tags, .tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0; }
.hero-tags span, .tag-row span, .mini-tag { padding: 8px 12px; background: rgba(255,255,255,.75); border: 1px solid var(--line); border-radius: 999px; color: #445777; font-size: 13px; }
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 26px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    letter-spacing: .02em;
    box-shadow: 0 16px 30px rgba(70,139,223,.28);
    transition: transform .2s ease, box-shadow .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(70,139,223,.34); }
.product-visual { position: relative; padding: 18px; border-radius: 28px; background: rgba(255,255,255,.72); border: 1px solid rgba(255,255,255,.86); box-shadow: var(--shadow); }
.app-frame { display: grid; place-items: center; padding: 18px; border-radius: 26px; background: linear-gradient(160deg, #f7fbff, #e7f2ff); border: 1px solid var(--line); }
.app-frame img { width: min(300px, 72vw); margin: 0 auto; border-radius: 30px; }
.float-card, .status-card {
    background: rgba(255,255,255,.9);
    border: 1px solid var(--line);
    box-shadow: 0 12px 28px rgba(25,80,150,.12);
    border-radius: 18px;
    padding: 13px 15px;
}
.float-card strong, .status-card strong { display: block; font-size: 14px; color: var(--deep); }
.float-card span, .status-card span { display: block; font-size: 12px; color: var(--muted); }
.float-stack { display: grid; gap: 10px; margin-top: 12px; }
.overview-strip { display: grid; gap: 12px; }
.metric-card, .category-card, .feature-card, .scenario-card, .faq-item, .guide-card, .tip-panel, .step-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 12px 30px rgba(45,88,137,.07);
}
.metric-card { padding: 22px; }
.metric-card .number { font-size: 28px; line-height: 1; color: var(--primary); font-weight: 900; margin-bottom: 10px; }
.metric-card h3, .feature-card h3, .category-card h3, .scenario-card h3 { margin: 0 0 8px; }
.metric-card p, .feature-card p, .category-card p, .scenario-card p, .guide-card p, .tip-panel p, .step-card p { margin: 0; color: var(--muted); }
.path-steps { display: grid; gap: 14px; counter-reset: path; }
.path-card { position: relative; padding: 22px; border-left: 3px solid var(--primary); }
.path-card::before { counter-increment: path; content: counter(path, decimal-leading-zero); display: inline-flex; color: var(--primary); font-weight: 900; margin-bottom: 10px; }
.path-card a, .category-card a, .scenario-card a, .inline-link { color: var(--primary); font-weight: 800; display: inline-block; margin-top: 12px; }
.category-grid, .feature-grid, .scenario-grid, .guide-grid { display: grid; gap: 16px; }
.category-card, .feature-card, .scenario-card, .guide-card { padding: 24px; }
.category-card .cat-no { color: var(--primary); font-weight: 900; font-size: 14px; }
.security-layout { display: grid; gap: 24px; align-items: center; }
.security-panel { padding: 24px; border-radius: 28px; background: linear-gradient(135deg, rgba(70,139,223,.15), rgba(255,255,255,.86)); border: 1px solid var(--line); }
.panel-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.panel-list li { display: flex; gap: 12px; align-items: flex-start; padding: 14px; border-radius: 16px; background: rgba(255,255,255,.82); border: 1px solid rgba(223,233,245,.9); color: var(--muted); }
.panel-list li b { color: var(--primary); }
.process-steps { display: grid; gap: 14px; }
.step-card { padding: 20px; }
.step-card .step-num { color: var(--primary); font-weight: 900; letter-spacing: .08em; }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 22px; }
.faq-item h3 { margin: 0 0 8px; font-size: 18px; }
.faq-item p { margin: 0; color: var(--muted); }
.cta-section { padding: 62px 0; }
.cta-box { text-align: center; padding: 42px 22px; border-radius: 30px; background: linear-gradient(135deg, rgba(70,139,223,.14), #fff); border: 1px solid var(--line); box-shadow: var(--shadow); }
.cta-box h2 { margin: 0 0 12px; font-size: clamp(28px, 6vw, 48px); line-height: 1.12; letter-spacing: -.04em; }
.cta-box p { margin: 0 auto 22px; color: var(--muted); max-width: 720px; }
.page-hero { padding: 54px 0 24px; background: radial-gradient(circle at 80% 0%, rgba(70,139,223,.16), transparent 30%); }
.page-title h1 { font-size: clamp(34px, 8vw, 62px); max-width: 820px; }
.content-layout { display: grid; gap: 24px; align-items: start; }
.article-body { background: rgba(255,255,255,.84); border: 1px solid var(--line); border-radius: 28px; padding: 24px; box-shadow: 0 12px 30px rgba(45,88,137,.06); }
.article-body h2 { margin-top: 28px; line-height: 1.25; }
.article-body p { color: #52627a; }
.article-body ul, .article-body ol { color: #52627a; padding-left: 22px; }
.side-panel { display: grid; gap: 14px; }
.tip-panel { padding: 22px; background: linear-gradient(135deg, #fff, #f1f7ff); }
.tip-panel h3 { margin: 0 0 8px; }
.download-only { margin-top: 24px; }
.timeline { display: grid; gap: 14px; }
.timeline-item { display: grid; grid-template-columns: 58px 1fr; gap: 14px; align-items: start; }
.timeline-item .dot { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; color: #fff; background: var(--primary); font-weight: 900; }
.timeline-item .body { padding: 18px; background: #fff; border: 1px solid var(--line); border-radius: 20px; }
.timeline-item h3 { margin: 0 0 6px; }
.timeline-item p { margin: 0; color: var(--muted); }
.site-footer { margin-top: 40px; padding: 38px 0 24px; background: #f0f6ff; border-top: 1px solid var(--line); }
.footer-layout { display: grid; gap: 24px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.footer-brand img { width: 34px; height: 34px; border-radius: 10px; }
.footer-layout p { color: var(--muted); margin: 0; }
.footer-links { display: grid; gap: 10px; }
.footer-links a { color: #52627a; }
.footer-bottom { margin-top: 22px; color: #8090a6; font-size: 13px; }
@media (min-width: 720px) {
    .overview-strip { grid-template-columns: repeat(4, 1fr); }
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-grid, .scenario-grid, .guide-grid { grid-template-columns: repeat(2, 1fr); }
    .process-steps { grid-template-columns: repeat(2, 1fr); }
    .article-body { padding: 34px; }
}
@media (min-width: 960px) {
    .nav-toggle-label { display: none; }
    .main-nav { position: static; display: flex; flex-direction: row; align-items: center; padding: 0; background: transparent; border: 0; box-shadow: none; }
    .main-nav a { padding: 9px 12px; }
    .hero-layout { padding: 88px 0 66px; }
    .hero-grid { grid-template-columns: 1.05fr .95fr; gap: 58px; }
    .float-stack { position: absolute; left: -24px; right: -20px; bottom: 26px; grid-template-columns: repeat(3, 1fr); }
    .product-visual { padding-bottom: 96px; }
    .category-grid { grid-template-columns: repeat(4, 1fr); }
    .feature-grid { grid-template-columns: repeat(3, 1fr); }
    .scenario-grid { grid-template-columns: repeat(3, 1fr); }
    .security-layout { grid-template-columns: .94fr 1.06fr; gap: 46px; }
    .process-steps { grid-template-columns: repeat(4, 1fr); }
    .content-layout { grid-template-columns: minmax(0, 1fr) 310px; }
    .footer-layout { grid-template-columns: 1fr 320px; }
}
@media (max-width: 420px) {
    .container { width: min(100% - 24px, 1120px); }
    .section { padding: 44px 0; }
    .hero-copy h1 { font-size: 36px; }
    .download-btn { width: 100%; }
    .overview-strip { grid-template-columns: 1fr; }
}