:root {
    --primary: rgb(70,139,223);
    --primary-dark: #245d9e;
    --primary-soft: #edf6ff;
    --ink: #11243d;
    --muted: #5f7088;
    --line: #dce9f7;
    --bg: #f7fbff;
    --card: #ffffff;
    --radius: 22px;
    --shadow: 0 18px 45px rgba(34, 94, 160, 0.11);
}
* { 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, #f3f9ff 0%, #ffffff 36%, #f7fbff 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: 50;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(220, 233, 247, 0.82);
}
.nav-wrap { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--ink); }
.logo { width: 38px; height: 38px; border-radius: 12px; }
.nav-toggle {
    width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 14px; background: #fff; display: inline-flex; flex-direction: column; justify-content: center; gap: 5px; padding: 0 10px;
}
.nav-toggle span { height: 2px; background: var(--ink); border-radius: 99px; }
.nav-links { display: none; position: absolute; left: 16px; right: 16px; top: 76px; padding: 12px; background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); }
.nav-links.open { display: grid; gap: 4px; }
.nav-links a { padding: 11px 13px; color: var(--muted); border-radius: 12px; font-weight: 650; font-size: 14px; }
.nav-links a:hover, .nav-links a.active { color: var(--primary-dark); background: var(--primary-soft); }
.section { padding: 56px 0; }
.section-title { margin: 0 0 14px; font-size: clamp(27px, 4vw, 42px); line-height: 1.2; letter-spacing: -0.02em; }
.section-lead { margin: 0 auto 28px; max-width: 760px; color: var(--muted); font-size: 16px; }
.eyebrow, .badge { display: inline-flex; align-items: center; gap: 7px; padding: 7px 12px; border-radius: 999px; background: #eaf4ff; color: var(--primary-dark); font-weight: 750; font-size: 13px; }
.hero { padding: 48px 0 64px; position: relative; }
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 20% 8%, rgba(70,139,223,.18), transparent 30%), radial-gradient(circle at 85% 25%, rgba(70,139,223,.12), transparent 25%); pointer-events: none; }
.hero-layout { position: relative; display: grid; gap: 34px; align-items: center; }
.hero h1 { margin: 16px 0; font-size: clamp(34px, 7vw, 62px); line-height: 1.08; letter-spacing: -0.045em; }
.hero p { margin: 0 0 22px; color: var(--muted); font-size: 17px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0; }
.hero-tags span, .mini-tag { padding: 8px 11px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.76); color: #39536f; font-size: 13px; font-weight: 650; }
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 12px 24px rgba(70,139,223,.27);
    transition: transform .2s ease, box-shadow .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 30px rgba(70,139,223,.33); }
.hero-visual { position: relative; min-height: 420px; display: grid; place-items: center; }
.phone-card { position: relative; width: min(300px, 74vw); padding: 18px; border-radius: 34px; background: linear-gradient(145deg, #ffffff, #eaf4ff); box-shadow: 0 30px 70px rgba(26,77,132,.18); border: 1px solid rgba(255,255,255,.9); }
.phone-card img { border-radius: 28px; }
.float-card { position: absolute; padding: 14px 16px; border-radius: 18px; background: rgba(255,255,255,.92); border: 1px solid rgba(220,233,247,.96); box-shadow: 0 16px 36px rgba(35,90,148,.13); max-width: 215px; }
.float-card strong { display: block; font-size: 14px; }
.float-card span { color: var(--muted); font-size: 12px; }
.float-card.status { left: 0; top: 18px; }
.float-card.asset { right: 0; top: 120px; }
.float-card.risk { left: 14px; bottom: 20px; }
.status-dot { display: inline-block; width: 9px; height: 9px; border-radius: 99px; background: #2ab57d; margin-right: 7px; }
.metric-strip { display: grid; gap: 14px; }
.metric { padding: 18px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 12px 30px rgba(70,139,223,.07); }
.metric strong { display: block; font-size: 18px; margin-bottom: 6px; }
.metric span { color: var(--muted); font-size: 14px; }
.grid, .feature-grid, .category-grid, .scenario-grid, .faq-grid, .article-grid, .steps { display: grid; gap: 16px; }
.category-card, .feature-card, .scenario-card, .faq-item, .step-card, .info-card, .article-card, .security-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 14px 34px rgba(33, 90, 153, 0.08);
}
.category-card { transition: transform .2s ease, border-color .2s ease; }
.category-card:hover { transform: translateY(-3px); border-color: rgba(70,139,223,.55); }
.category-card h3, .feature-card h3, .scenario-card h3, .step-card h3, .info-card h3, .article-card h3 { margin: 0 0 8px; font-size: 18px; }
.category-card p, .feature-card p, .scenario-card p, .step-card p, .info-card p, .article-card p, .faq-item p { margin: 0; color: var(--muted); }
.card-link { margin-top: 14px; display: inline-flex; color: var(--primary-dark); font-weight: 800; }
.step-no { width: 38px; height: 38px; display: inline-grid; place-items: center; border-radius: 14px; background: var(--primary); color: #fff; font-weight: 800; margin-bottom: 14px; }
.security-layout { display: grid; gap: 22px; align-items: center; }
.security-panel { padding: 24px; border-radius: 28px; background: linear-gradient(135deg, #ffffff 0%, #edf7ff 100%); border: 1px solid var(--line); box-shadow: var(--shadow); }
.panel-row { display: flex; justify-content: space-between; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.panel-row:last-child { border-bottom: 0; }
.panel-row span { color: var(--muted); }
.panel-row strong { color: var(--primary-dark); text-align: right; }
.cta-section { text-align: center; padding: 42px 22px; border-radius: 30px; background: linear-gradient(135deg, #eaf4ff 0%, #ffffff 65%, #f5faff 100%); border: 1px solid var(--line); box-shadow: var(--shadow); }
.cta-section h2 { margin: 0 0 12px; font-size: clamp(26px, 4vw, 38px); }
.cta-section p { margin: 0 auto 22px; max-width: 720px; color: var(--muted); }
.page-hero { padding: 48px 0 28px; }
.page-hero .container { display: grid; gap: 18px; }
.page-hero h1 { margin: 12px 0 0; font-size: clamp(31px, 5vw, 48px); line-height: 1.18; letter-spacing: -0.03em; }
.page-hero p { margin: 0; color: var(--muted); max-width: 780px; }
.content-block { padding: 34px 0 60px; }
.article-shell { display: grid; gap: 18px; }
.article-main { background: #fff; border: 1px solid var(--line); border-radius: 28px; padding: 24px; box-shadow: var(--shadow); }
.article-main h2 { margin: 4px 0 12px; font-size: 24px; }
.article-main p { color: #425870; }
.article-main ul, .article-main ol { padding-left: 22px; color: #425870; }
.article-main li { margin: 8px 0; }
.notice { padding: 18px; border-radius: 20px; background: #f0f7ff; border: 1px solid #d5e9ff; color: #34516f; }
.note-grid { display: grid; gap: 14px; margin: 20px 0; }
.faq-item h3 { margin: 0 0 8px; font-size: 17px; }
.site-footer { background: #0f2744; color: rgba(255,255,255,.84); padding: 42px 0 26px; margin-top: 24px; }
.footer-grid { display: grid; gap: 24px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 850; font-size: 19px; }
.footer-brand img { width: 34px; height: 34px; border-radius: 10px; }
.site-footer h3 { margin: 0 0 10px; color: #fff; font-size: 15px; }
.site-footer a { display: block; color: rgba(255,255,255,.74); margin: 8px 0; }
.site-footer p { margin: 14px 0 0; color: rgba(255,255,255,.70); }
.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; color: rgba(255,255,255,.62); }
.center { text-align: center; }
.soft-bg { background: linear-gradient(180deg, #f7fbff, #ffffff); }
.inline-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; }
.kicker-row { display: flex; gap: 10px; flex-wrap: wrap; }
@media (min-width: 640px) {
    .metric-strip, .category-grid, .note-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 860px) {
    .nav-toggle { display: none; }
    .nav-links { position: static; display: flex; align-items: center; gap: 4px; padding: 0; background: transparent; border: 0; box-shadow: none; }
    .nav-links a { padding: 9px 12px; }
    .hero { padding-top: 72px; }
    .hero-layout { grid-template-columns: 1.02fr .98fr; }
    .metric-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .category-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .feature-grid, .scenario-grid, .faq-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .security-layout { grid-template-columns: 1fr .9fr; }
    .article-shell { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
    .footer-grid { grid-template-columns: 1.4fr repeat(3, 1fr); }
    .footer-bottom { flex-direction: row; justify-content: space-between; }
    .article-main { padding: 34px; }
}
@media (min-width: 1080px) {
    .hero-visual { min-height: 520px; }
    .phone-card { width: 330px; }
    .float-card.status { left: 12px; top: 28px; }
    .float-card.asset { right: 10px; top: 150px; }
    .float-card.risk { left: 44px; bottom: 48px; }
}