:root {
    --primary: rgb(70,139,223);
    --primary-dark: #1f5fa8;
    --primary-soft: #eaf4ff;
    --ink: #13243a;
    --muted: #61738a;
    --line: #dce8f7;
    --card: rgba(255,255,255,0.92);
    --bg: #f6faff;
    --shadow: 0 18px 45px rgba(53, 105, 168, 0.12);
    --radius: 24px;
}
* { 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 42%, #f5f9ff 100%);
    line-height: 1.72;
    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(255,255,255,0.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(215,230,247,0.8);
}
.header-inner { 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; letter-spacing: 0.3px; }
.logo { width: 36px; height: 36px; border-radius: 12px; }
.brand-text { font-size: 20px; color: #0d2747; }
.nav-toggle {
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 999px;
    padding: 8px 14px;
    color: var(--ink);
    font-weight: 700;
}
.site-nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 16px;
    right: 16px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 10px;
    box-shadow: var(--shadow);
}
.site-nav.open { display: grid; }
.site-nav a { padding: 10px 12px; border-radius: 12px; color: #334a64; font-weight: 650; }
.site-nav a.active, .site-nav a:hover { background: var(--primary-soft); color: var(--primary-dark); }
.section { padding: 56px 0; }
.section-title { margin: 0 0 12px; font-size: clamp(26px, 4vw, 42px); line-height: 1.18; letter-spacing: -0.03em; }
.section-lead { margin: 0 0 28px; color: var(--muted); max-width: 760px; }
.center { text-align: center; }
.center .section-lead { margin-left: auto; margin-right: auto; }
.hero-banner {
    padding: 64px 0 42px;
    background:
        radial-gradient(circle at 18% 22%, rgba(70,139,223,0.16), transparent 32%),
        radial-gradient(circle at 88% 28%, rgba(108,178,255,0.14), transparent 30%);
}
.hero-layout { display: grid; gap: 32px; align-items: center; }
.eyebrow, .badge, .category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    border: 1px solid rgba(70,139,223,0.18);
    background: rgba(234,244,255,0.86);
    color: var(--primary-dark);
    border-radius: 999px;
    padding: 7px 12px;
    font-size: 13px;
    font-weight: 750;
}
.hero-title { font-size: clamp(34px, 8vw, 66px); line-height: 1.08; letter-spacing: -0.055em; margin: 16px 0; }
.hero-text { color: var(--muted); font-size: 17px; margin: 0 0 24px; max-width: 620px; }
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    min-width: 148px;
    padding: 13px 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(70,139,223,0.28);
    transition: transform .18s ease, box-shadow .18s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(70,139,223,0.32); }
.safe-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.safe-tags span, .mini-tag {
    border: 1px solid var(--line);
    background: rgba(255,255,255,0.84);
    color: #38526f;
    border-radius: 999px;
    padding: 7px 11px;
    font-size: 13px;
    font-weight: 700;
}
.hero-visual { position: relative; }
.console-card {
    position: relative;
    background: linear-gradient(145deg, rgba(255,255,255,0.96), rgba(236,246,255,0.84));
    border: 1px solid rgba(220,232,247,0.96);
    border-radius: 32px;
    padding: 22px;
    box-shadow: var(--shadow);
    overflow: hidden;
}
.console-card::before {
    content: "";
    position: absolute;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    right: -80px;
    top: -70px;
    background: rgba(70,139,223,0.12);
}
.app-frame { width: min(250px, 72vw); margin: 10px auto; position: relative; z-index: 2; }
.status-panel {
    position: relative;
    z-index: 2;
    display: grid;
    gap: 10px;
    margin-top: 16px;
}
.status-card {
    background: rgba(255,255,255,0.88);
    border: 1px solid rgba(220,232,247,0.9);
    border-radius: 18px;
    padding: 13px 14px;
    box-shadow: 0 10px 25px rgba(39,92,156,0.08);
}
.status-card strong { display: block; font-size: 14px; color: #163654; }
.status-card span { color: var(--muted); font-size: 13px; }
.metric-strip {
    display: grid;
    gap: 12px;
}
.metric-card, .feature-card, .category-card, .scenario-card, .faq-item, .info-card, .doc-panel, .step-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 12px 32px rgba(44,89,145,0.08);
}
.metric-card strong { display: block; font-size: 18px; margin-bottom: 6px; }
.metric-card p, .feature-card p, .category-card p, .scenario-card p, .info-card p, .doc-panel p, .step-card p { color: var(--muted); margin: 0; }
.category-nav { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 0; }
.category-nav a { background: #fff; border: 1px solid var(--line); color: #35506d; border-radius: 999px; padding: 8px 12px; font-size: 14px; font-weight: 700; }
.category-grid, .feature-grid, .scenario-grid, .recommend-grid { display: grid; gap: 16px; }
.category-card, .scenario-card { display: grid; gap: 10px; }
.category-card h3, .feature-card h3, .scenario-card h3, .info-card h3, .step-card h3 { margin: 0; font-size: 20px; line-height: 1.3; }
.card-link { color: var(--primary-dark); font-weight: 800; margin-top: 4px; display: inline-flex; }
.process-steps, .steps { display: grid; gap: 14px; counter-reset: step; }
.step-card { position: relative; padding-left: 70px; }
.step-card::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    position: absolute;
    left: 20px;
    top: 22px;
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    font-size: 13px;
}
.security-layout { display: grid; gap: 24px; align-items: center; }
.security-panel { background: linear-gradient(145deg, #fff, #edf6ff); border: 1px solid var(--line); border-radius: 28px; padding: 24px; box-shadow: var(--shadow); }
.security-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.security-list li { background: rgba(255,255,255,0.76); border: 1px solid var(--line); border-radius: 16px; padding: 14px 16px; color: #354d68; }
.faq-list { display: grid; gap: 14px; }
.faq-item h3 { margin: 0 0 8px; font-size: 18px; }
.faq-item p { margin: 0; color: var(--muted); }
.cta-section {
    margin: 32px 0 70px;
    padding: 42px 24px;
    border: 1px solid rgba(70,139,223,0.16);
    border-radius: 32px;
    text-align: center;
    background: linear-gradient(135deg, #eef7ff, #fff 70%);
    box-shadow: var(--shadow);
}
.cta-section p { color: var(--muted); max-width: 680px; margin: 0 auto 22px; }
.page-hero { padding: 52px 0 24px; }
.page-hero .reading { max-width: 820px; }
.reading { max-width: 880px; margin: 0 auto; }
.doc-layout { display: grid; gap: 22px; align-items: start; }
.doc-body { display: grid; gap: 18px; }
.doc-panel h2 { margin-top: 0; }
.doc-list { margin: 0; padding-left: 20px; color: #425b76; }
.doc-list li { margin: 8px 0; }
.note-panel { background: #f0f7ff; border: 1px solid #cfe4fb; border-radius: 20px; padding: 18px; color: #35506d; }
.site-footer { background: #f2f7fd; border-top: 1px solid var(--line); padding: 42px 0 20px; color: #3d5571; }
.footer-grid { display: grid; gap: 22px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #0d2747; }
.footer-brand img { width: 32px; height: 32px; border-radius: 10px; }
.site-footer h3 { margin: 0 0 8px; font-size: 15px; color: #183654; }
.site-footer a { display: block; color: #536d89; padding: 4px 0; }
.footer-bottom { border-top: 1px solid var(--line); margin-top: 28px; padding-top: 18px; font-size: 13px; color: #708298; }
.home-intro { background: #fff; border-top: 1px solid rgba(220,232,247,0.65); border-bottom: 1px solid rgba(220,232,247,0.65); }
.feature-grid .large { min-height: 230px; background: linear-gradient(145deg, #fff, #eef7ff); }
.small-pill-grid { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
@media (min-width: 700px) {
    .metric-strip { grid-template-columns: repeat(2, 1fr); }
    .category-grid, .scenario-grid, .recommend-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; }
}
@media (min-width: 960px) {
    .nav-toggle { display: none; }
    .site-nav { display: flex; position: static; background: transparent; box-shadow: none; border: 0; padding: 0; gap: 2px; }
    .site-nav a { padding: 8px 12px; }
    .hero-banner { padding: 92px 0 72px; }
    .hero-layout { grid-template-columns: 1.02fr .98fr; gap: 56px; }
    .status-panel { grid-template-columns: repeat(2, 1fr); }
    .metric-strip { grid-template-columns: repeat(4, 1fr); }
    .category-grid { grid-template-columns: repeat(3, 1fr); }
    .category-card.wide { grid-column: span 2; }
    .feature-grid { grid-template-columns: repeat(6, 1fr); }
    .feature-card { min-height: 180px; }
    .feature-card.large { grid-column: span 3; }
    .feature-card.medium { grid-column: span 2; }
    .feature-card.small { grid-column: span 1; }
    .security-layout { grid-template-columns: 1fr .9fr; }
    .process-steps { grid-template-columns: repeat(3, 1fr); }
    .steps { grid-template-columns: repeat(4, 1fr); }
    .scenario-grid { grid-template-columns: repeat(5, 1fr); }
    .scenario-card { grid-column: span 1; }
    .recommend-grid { grid-template-columns: repeat(3, 1fr); }
    .doc-layout { grid-template-columns: minmax(0, 1fr) 320px; }
    .section { padding: 74px 0; }
}
@media (max-width: 420px) {
    .container { width: min(100% - 24px, 1120px); }
    .hero-title { font-size: 32px; }
    .section { padding: 44px 0; }
    .download-btn { width: 100%; }
    .step-card { padding-left: 62px; }
}