:root {
    --primary: rgb(70,139,223);
    --primary-dark: #2f6fbd;
    --primary-soft: #eaf3ff;
    --text: #13233a;
    --muted: #607086;
    --line: #d9e6f5;
    --surface: #ffffff;
    --surface-blue: #f5f9ff;
    --shadow: 0 18px 45px rgba(32, 89, 152, 0.10);
    --radius: 22px;
}
* { 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(--text);
    background: linear-gradient(180deg, #f7fbff 0%, #ffffff 36%, #f8fbff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.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(217,230,245,0.78);
}
.header-inner, .container, .footer-inner {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}
.header-inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.brand, .footer-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -0.02em; }
.logo-img { width: 42px; height: 42px; object-fit: contain; }
.brand-text { font-size: 18px; }
.nav-toggle {
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 14px;
    width: 44px;
    height: 40px;
    color: var(--primary);
    font-size: 22px;
}
.site-nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
    box-shadow: var(--shadow);
}
.site-nav.is-open { display: grid; gap: 6px; }
.site-nav a { padding: 10px 12px; border-radius: 12px; color: #40506a; font-size: 14px; }
.site-nav a:hover { background: var(--primary-soft); color: var(--primary-dark); }
.section { padding: 46px 0; }
.section-tight { padding: 30px 0; }
.section-title { margin: 0 0 12px; font-size: clamp(26px, 4vw, 42px); line-height: 1.22; letter-spacing: -0.04em; }
.section-lead { margin: 0 0 24px; color: var(--muted); max-width: 760px; }
.center { text-align: center; }
.center .section-lead { margin-left: auto; margin-right: auto; }
.hero-layout {
    padding: 56px 0 42px;
    display: grid;
    gap: 30px;
    align-items: center;
}
.hero-copy h1, .centered-hero h1, .page-hero h1 {
    margin: 0 0 18px;
    font-size: clamp(34px, 8vw, 64px);
    line-height: 1.08;
    letter-spacing: -0.06em;
}
.hero-copy p, .centered-hero p, .page-hero p { margin: 0 0 22px; color: var(--muted); font-size: 17px; }
.hero-tags, .tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.hero-tags span, .tag-list span, .badge {
    display: inline-flex;
    align-items: center;
    padding: 7px 11px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary-dark);
    border: 1px solid #d7e9ff;
    font-size: 13px;
    font-weight: 700;
}
.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(70,139,223,0.26);
    border: 0;
    transition: transform .2s ease, box-shadow .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 30px rgba(70,139,223,0.32); }
.product-panel, .product-bento {
    position: relative;
    min-height: 520px;
    border: 1px solid rgba(217,230,245,0.86);
    border-radius: 32px;
    background: radial-gradient(circle at 20% 10%, #eaf4ff 0, rgba(234,244,255,0) 42%), linear-gradient(145deg, #fff 0%, #f4f9ff 100%);
    box-shadow: var(--shadow);
    padding: 24px;
    overflow: hidden;
}
.app-card {
    width: min(260px, 82%);
    margin: 18px auto;
    padding: 18px;
    border-radius: 30px;
    background: rgba(255,255,255,0.78);
    border: 1px solid rgba(217,230,245,0.9);
    box-shadow: 0 24px 60px rgba(21,77,141,0.16);
}
.status-card, .floating-card {
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(255,255,255,0.9);
    border: 1px solid rgba(217,230,245,0.95);
    box-shadow: 0 16px 32px rgba(54,92,132,0.10);
}
.status-card strong, .floating-card strong { display: block; color: var(--text); font-size: 15px; }
.status-card span, .floating-card span { color: var(--muted); font-size: 13px; }
.product-panel .status-grid { display: grid; gap: 12px; }
.metric-strip {
    display: grid;
    gap: 12px;
}
.metric {
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255,255,255,0.88);
    box-shadow: 0 10px 30px rgba(70,139,223,0.08);
}
.metric b { display: block; font-size: 22px; color: var(--primary-dark); }
.metric span { color: var(--muted); font-size: 14px; }
.card, .category-card, .feature-card, .scenario-card, .faq-item, .tip-card, .process-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 12px 32px rgba(33,90,145,0.07);
}
.card h3, .category-card h3, .feature-card h3, .scenario-card h3, .tip-card h3 { margin: 0 0 8px; font-size: 20px; letter-spacing: -0.02em; }
.card p, .category-card p, .feature-card p, .scenario-card p, .tip-card p { margin: 0; color: var(--muted); }
.card-link { display: inline-flex; margin-top: 14px; color: var(--primary-dark); font-weight: 800; }
.category-nav, .category-grid, .feature-grid, .scenario-grid, .resource-grid {
    display: grid;
    gap: 16px;
}
.category-card:hover, .scenario-card:hover { transform: translateY(-2px); border-color: #bcd8f7; }
.category-card, .scenario-card { transition: transform .2s ease, border-color .2s ease; }
.category-card.large, .feature-card.large { background: linear-gradient(145deg, #ffffff, #eef6ff); }
.feature-card.small { min-height: 150px; }
.bento-grid {
    display: grid;
    gap: 16px;
}
.security-layout {
    display: grid;
    gap: 20px;
    align-items: start;
}
.security-panel {
    border-radius: 28px;
    border: 1px solid #cfe1f5;
    background: linear-gradient(160deg, #ffffff 0%, #eef6ff 100%);
    padding: 24px;
    box-shadow: var(--shadow);
}
.security-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.security-list li {
    padding: 14px 14px 14px 42px;
    position: relative;
    border-radius: 16px;
    background: rgba(255,255,255,0.78);
    border: 1px solid var(--line);
    color: #394a62;
}
.security-list li::before {
    content: "✓";
    position: absolute;
    left: 14px;
    top: 13px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: #fff;
    background: var(--primary);
    font-size: 12px;
}
.steps, .roadmap, .process-steps {
    display: grid;
    gap: 14px;
    counter-reset: step;
}
.step, .process-card {
    position: relative;
    padding: 20px;
    border-radius: var(--radius);
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 10px 28px rgba(70,139,223,0.07);
}
.step-num {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: inline-grid;
    place-items: center;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    margin-bottom: 12px;
}
.step h3, .process-card h3 { margin: 0 0 8px; }
.step p, .process-card p { margin: 0; color: var(--muted); }
.faq-list { display: grid; gap: 12px; }
.faq-item h3 { margin: 0 0 8px; font-size: 18px; }
.faq-item p { margin: 0; color: var(--muted); }
.cta-section {
    margin: 26px 0 60px;
    padding: 34px 22px;
    text-align: center;
    border-radius: 32px;
    background: linear-gradient(135deg, #eef6ff 0%, #ffffff 56%, #eaf3ff 100%);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.cta-section p { color: var(--muted); max-width: 660px; margin: 0 auto 20px; }
.page-hero {
    padding: 48px 0 22px;
}
.page-hero .badge { margin-bottom: 16px; }
.doc-layout {
    display: grid;
    gap: 22px;
    align-items: start;
}
.doc-main {
    background: rgba(255,255,255,0.86);
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 24px;
    box-shadow: var(--shadow);
}
.doc-main p { color: #4d5e72; margin: 0 0 16px; }
.doc-main h2 { margin-top: 24px; }
.note-list, .check-list { padding: 0; margin: 16px 0 0; list-style: none; display: grid; gap: 10px; }
.note-list li, .check-list li {
    padding: 12px 14px;
    border-radius: 15px;
    border: 1px solid var(--line);
    background: var(--surface-blue);
    color: #3d5068;
}
.doc-aside { display: grid; gap: 16px; }
.inline-actions { margin-top: 20px; }
.download-page-card {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
}
.site-footer {
    background: #f2f7fd;
    border-top: 1px solid var(--line);
    padding: 34px 0 20px;
}
.footer-inner { display: grid; gap: 24px; }
.footer-brand img { width: 38px; height: 38px; }
.footer-inner p { color: var(--muted); max-width: 580px; margin: 12px 0 0; }
.footer-links { display: grid; gap: 8px; }
.footer-links a { color: #40506a; }
.footer-bottom { width: min(1120px, calc(100% - 32px)); margin: 26px auto 0; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
@media (min-width: 680px) {
    .metric-strip, .category-grid, .feature-grid, .scenario-grid, .resource-grid { grid-template-columns: repeat(2, 1fr); }
    .steps, .roadmap { grid-template-columns: repeat(2, 1fr); }
    .doc-main { padding: 32px; }
}
@media (min-width: 960px) {
    .nav-toggle { display: none; }
    .site-nav { position: static; display: flex; align-items: center; gap: 4px; padding: 0; border: 0; box-shadow: none; background: transparent; }
    .hero-layout { grid-template-columns: minmax(0, 1fr) minmax(420px, 0.9fr); padding: 78px 0 64px; }
    .product-panel .status-grid { position: absolute; inset: auto 24px 24px 24px; grid-template-columns: repeat(2, 1fr); }
    .metric-strip { grid-template-columns: repeat(4, 1fr); }
    .category-grid { grid-template-columns: repeat(3, 1fr); }
    .category-card.large { grid-column: span 2; }
    .feature-grid { grid-template-columns: repeat(3, 1fr); }
    .bento-grid { grid-template-columns: repeat(6, 1fr); }
    .bento-grid .feature-card.large { grid-column: span 3; min-height: 220px; }
    .bento-grid .feature-card.medium { grid-column: span 2; }
    .bento-grid .feature-card.small { grid-column: span 1; }
    .security-layout { grid-template-columns: 0.95fr 1.05fr; gap: 34px; }
    .roadmap { grid-template-columns: repeat(6, 1fr); }
    .steps { grid-template-columns: repeat(3, 1fr); }
    .scenario-grid { grid-template-columns: repeat(5, 1fr); }
    .scenario-card { grid-column: span 1; }
    .doc-layout { grid-template-columns: minmax(0, 1fr) 320px; gap: 28px; }
    .footer-inner { grid-template-columns: 1fr auto; align-items: start; }
}
@media (max-width: 430px) {
    .header-inner, .container, .footer-inner, .footer-bottom { width: min(100% - 24px, 1120px); }
    .hero-layout { padding-top: 36px; }
    .product-panel { min-height: auto; }
    .hero-copy h1, .page-hero h1 { font-size: 34px; }
    .download-btn { width: 100%; }
}