:root {
    --primary: rgb(70,139,223);
    --primary-dark: #2368b8;
    --primary-soft: #eaf4ff;
    --ink: #13243a;
    --muted: #62748c;
    --line: #dbe8f6;
    --panel: rgba(255,255,255,.86);
    --bg: #f7fbff;
    --radius: 22px;
    --shadow: 0 18px 45px rgba(45, 95, 150, .12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--ink);
    line-height: 1.72;
    background:
        radial-gradient(circle at 10% 0%, rgba(70,139,223,.13), transparent 28rem),
        linear-gradient(180deg, #ffffff 0%, #f5faff 45%, #ffffff 100%);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.84);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(219,232,246,.78);
}
.nav-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.brand, .footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: .02em;
}
.logo { width: 38px; height: 38px; border-radius: 12px; }
.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
    background: rgba(255,255,255,.96);
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}
.site-nav.is-open { display: flex; }
.site-nav a {
    padding: 10px 12px;
    color: var(--muted);
    border-radius: 12px;
    font-size: 15px;
}
.site-nav a.active, .site-nav a:hover {
    color: var(--primary-dark);
    background: var(--primary-soft);
}
.nav-toggle {
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    border-radius: 999px;
    padding: 8px 14px;
    font-weight: 700;
}
.container {
    width: min(1160px, calc(100% - 32px));
    margin: 0 auto;
}
.narrow { width: min(880px, calc(100% - 32px)); }
.section { padding: 64px 0; }
.section-title { margin-bottom: 24px; }
.section-title.center { text-align: center; }
.eyebrow, .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid rgba(70,139,223,.24);
    background: rgba(70,139,223,.09);
    color: var(--primary-dark);
    border-radius: 999px;
    padding: 6px 12px;
    font-weight: 800;
    font-size: 13px;
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 14px; }
h1 { font-size: clamp(34px, 8vw, 62px); letter-spacing: -.045em; }
h2 { font-size: clamp(26px, 5vw, 40px); letter-spacing: -.03em; }
h3 { font-size: 20px; }
p { margin: 0 0 16px; color: var(--muted); }
.hero-layout {
    padding: 76px 0 46px;
    display: grid;
    gap: 36px;
    align-items: center;
}
.hero-copy { text-align: left; }
.hero-copy .lead {
    font-size: 18px;
    color: #41576f;
    max-width: 720px;
}
.hero-tags, .chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0 28px;
}
.chip {
    padding: 8px 12px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--line);
    color: #476078;
    font-size: 14px;
    box-shadow: 0 8px 22px rgba(70,139,223,.07);
}
.download-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-height: 48px;
    padding: 0 26px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 850;
    box-shadow: 0 14px 30px rgba(70,139,223,.26);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 18px 34px rgba(70,139,223,.3); }
.hero-visual {
    position: relative;
    min-height: 520px;
    border-radius: 32px;
    padding: 24px;
    background:
        linear-gradient(145deg, rgba(255,255,255,.9), rgba(234,244,255,.86)),
        radial-gradient(circle at 70% 20%, rgba(70,139,223,.2), transparent 12rem);
    border: 1px solid rgba(70,139,223,.18);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.phone-card {
    width: min(320px, 78vw);
    margin: 22px auto;
    padding: 18px;
    border-radius: 34px;
    background: linear-gradient(180deg, #ffffff, #eef7ff);
    border: 1px solid rgba(70,139,223,.2);
    box-shadow: 0 30px 60px rgba(25,81,140,.16);
}
.phone-card img { border-radius: 26px; width: 100%; }
.float-card, .status-pill {
    position: relative;
    margin: 10px 0;
    padding: 12px 14px;
    border-radius: 18px;
    background: rgba(255,255,255,.9);
    border: 1px solid rgba(219,232,246,.9);
    box-shadow: 0 12px 26px rgba(44,92,145,.11);
}
.float-card strong, .status-pill strong { display: block; font-size: 14px; color: var(--ink); }
.float-card span, .status-pill span { color: var(--muted); font-size: 13px; }
.status-cluster { display: grid; grid-template-columns: 1fr; gap: 10px; }
.metrics-strip {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 18px;
    border-radius: 26px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.metric {
    padding: 16px;
    border-radius: 20px;
    background: linear-gradient(180deg, #f9fcff, #eef7ff);
    border: 1px solid rgba(70,139,223,.12);
}
.metric b { display: block; font-size: 18px; color: var(--primary-dark); }
.card, .category-card, .feature-card, .scenario-card, .doc-card, .faq-item {
    background: var(--panel);
    border: 1px solid rgba(219,232,246,.92);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 12px 34px rgba(51,105,166,.08);
}
.card.linked:hover, .category-card:hover, .scenario-card:hover { border-color: rgba(70,139,223,.36); transform: translateY(-2px); }
.grid, .category-grid, .feature-grid, .scenario-grid, .doc-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.category-card { min-height: 156px; display: flex; flex-direction: column; gap: 8px; transition: .2s ease; }
.category-card .more, .scenario-card .more, .path-card .more { color: var(--primary-dark); font-weight: 800; margin-top: auto; }
.feature-grid .large { min-height: 210px; }
.feature-card h3::before, .category-card h3::before, .scenario-card h3::before {
    content: "";
    display: inline-block;
    width: 9px;
    height: 9px;
    margin-right: 8px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 5px rgba(70,139,223,.12);
}
.path-steps, .steps {
    counter-reset: step;
    display: grid;
    gap: 14px;
}
.path-card, .step-card {
    position: relative;
    padding: 22px;
    border-radius: 22px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 12px 28px rgba(45,95,150,.08);
}
.path-card::before, .step-card::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    display: inline-flex;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    margin-bottom: 14px;
}
.security-layout {
    display: grid;
    gap: 22px;
    align-items: start;
}
.security-panel {
    border-radius: 28px;
    padding: 24px;
    background: linear-gradient(145deg, #ffffff, #eef7ff);
    border: 1px solid rgba(70,139,223,.18);
    box-shadow: var(--shadow);
}
.principle-list { display: grid; gap: 12px; margin-top: 14px; }
.principle {
    padding: 14px;
    border-radius: 16px;
    background: #fff;
    border: 1px solid var(--line);
    color: #455c76;
}
.cta-section {
    text-align: center;
    padding: 48px 24px;
    border-radius: 30px;
    background:
        radial-gradient(circle at 20% 0%, rgba(70,139,223,.16), transparent 15rem),
        linear-gradient(135deg, #ffffff, #edf7ff);
    border: 1px solid rgba(70,139,223,.16);
    box-shadow: var(--shadow);
}
.faq-list { display: grid; gap: 12px; }
.faq-item summary {
    cursor: pointer;
    font-weight: 850;
    color: var(--ink);
}
.faq-item p { margin: 12px 0 0; }
.page-hero {
    padding: 58px 0 28px;
    background: linear-gradient(180deg, rgba(234,244,255,.76), rgba(255,255,255,0));
}
.page-hero .summary { font-size: 18px; max-width: 820px; }
.doc-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: var(--shadow);
}
.article-body h2 { font-size: 24px; margin-top: 10px; }
.article-body ul, .article-body ol { padding-left: 22px; color: var(--muted); }
.notice {
    border-left: 4px solid var(--primary);
    background: #f0f7ff;
    border-radius: 18px;
    padding: 16px;
    margin: 18px 0;
    color: #48617a;
}
.sidebar { display: grid; gap: 14px; }
.check-list { list-style: none; padding: 0 !important; display: grid; gap: 10px; }
.check-list li {
    padding: 12px 14px;
    border-radius: 14px;
    background: #f8fcff;
    border: 1px solid var(--line);
}
.two-column { display: grid; gap: 16px; }
.inline-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.inline-links a {
    padding: 9px 12px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--primary-dark);
    font-weight: 750;
}
.site-footer {
    margin-top: 70px;
    padding: 48px 0 20px;
    background: #0f2238;
    color: rgba(255,255,255,.86);
}
.site-footer p { color: rgba(255,255,255,.68); }
.footer-grid { display: grid; gap: 24px; }
.footer-grid h3 { font-size: 16px; color: #fff; }
.footer-grid a { display: block; color: rgba(255,255,255,.68); margin: 8px 0; }
.footer-brand img { width: 36px; height: 36px; border-radius: 12px; }
.footer-bottom {
    width: min(1160px, calc(100% - 32px));
    margin: 28px auto 0;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,.12);
    color: rgba(255,255,255,.54);
    font-size: 14px;
}
@media (min-width: 700px) {
    .metrics-strip { grid-template-columns: repeat(2, 1fr); }
    .category-grid, .feature-grid, .scenario-grid, .doc-grid, .grid { grid-template-columns: repeat(2, 1fr); }
    .steps { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
    .two-column { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 980px) {
    .nav-toggle { display: none; }
    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
        gap: 4px;
    }
    .site-nav a { padding: 8px 12px; }
    .hero-layout { grid-template-columns: 1.05fr .95fr; padding-top: 92px; }
    .hero-visual { min-height: 560px; }
    .status-cluster { position: absolute; inset: 24px; pointer-events: none; }
    .status-cluster .float-card { position: absolute; width: 210px; }
    .status-cluster .float-card:nth-child(1) { left: 18px; top: 26px; }
    .status-cluster .float-card:nth-child(2) { right: 16px; top: 82px; }
    .status-cluster .float-card:nth-child(3) { left: 28px; bottom: 76px; }
    .status-cluster .float-card:nth-child(4) { right: 22px; bottom: 28px; }
    .metrics-strip { grid-template-columns: repeat(4, 1fr); }
    .path-steps { grid-template-columns: repeat(6, 1fr); }
    .path-card { padding: 18px; }
    .category-grid { grid-template-columns: repeat(6, 1fr); }
    .category-card { grid-column: span 2; }
    .category-card.wide { grid-column: span 3; }
    .feature-grid { grid-template-columns: repeat(6, 1fr); }
    .feature-card { grid-column: span 2; }
    .feature-card.large { grid-column: span 3; }
    .security-layout { grid-template-columns: 1fr .86fr; }
    .scenario-grid { grid-template-columns: repeat(5, 1fr); }
    .scenario-card { grid-column: span 1; }
    .doc-layout { grid-template-columns: minmax(0, 1fr) 320px; }
    .doc-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 420px) {
    .container, .narrow, .nav-shell, .footer-bottom { width: min(100% - 24px, 1160px); }
    .section { padding: 46px 0; }
    .hero-layout { padding-top: 52px; }
    .hero-visual { min-height: auto; padding: 16px; }
    .download-btn { width: 100%; }
    .cta-section { padding: 34px 18px; }
}