:root {
    --primary: rgb(70,139,223);
    --primary-dark: rgb(38,92,168);
    --primary-soft: rgba(70,139,223,.12);
    --primary-faint: rgba(70,139,223,.07);
    --text: #142033;
    --muted: #64748b;
    --line: #dbe8f7;
    --surface: #ffffff;
    --surface-soft: #f6faff;
    --bg: #f8fbff;
    --radius: 22px;
    --shadow: 0 18px 48px rgba(42, 91, 153, .12);
    --shadow-soft: 0 10px 30px rgba(42, 91, 153, .08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.72;
    background:
        radial-gradient(circle at top left, rgba(70,139,223,.14), transparent 34rem),
        linear-gradient(180deg, #f7fbff 0%, #ffffff 42%, #f8fbff 100%);
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
p { margin: 0 0 1rem; color: var(--muted); }
main { min-height: 68vh; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.86);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(219,232,247,.85);
}
.header-inner {
    width: min(1160px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 750; letter-spacing: -.02em; }
.logo img { width: 38px; height: 38px; border-radius: 12px; box-shadow: 0 8px 20px rgba(70,139,223,.18); }
.site-nav { display: none; gap: 6px; align-items: center; }
.site-nav a {
    padding: 9px 12px;
    color: #43536b;
    border-radius: 999px;
    font-size: 14px;
    transition: background .2s ease, color .2s ease;
}
.site-nav a:hover, .site-nav a.active { color: var(--primary-dark); background: var(--primary-soft); }
.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }
.nav-toggle-label { width: 42px; height: 42px; display: inline-flex; flex-direction: column; justify-content: center; gap: 5px; align-items: center; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.nav-toggle-label span { width: 18px; height: 2px; background: #30445f; border-radius: 2px; }
.nav-toggle:checked ~ .site-nav {
    display: grid;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 74px;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}
.nav-toggle:checked ~ .site-nav a { padding: 12px 14px; }
.section, .centered-hero, .page-hero, .doc-page { width: min(1160px, calc(100% - 32px)); margin: 0 auto; }
.centered-hero { padding: 72px 0 34px; text-align: center; }
.eyebrow, .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: 680;
}
h1, h2, h3 { margin: 0; letter-spacing: -.04em; color: #10213a; line-height: 1.18; }
h1 { margin-top: 18px; font-size: clamp(36px, 8vw, 72px); }
h2 { font-size: clamp(26px, 4vw, 42px); margin-bottom: 14px; }
h3 { font-size: 20px; margin-bottom: 8px; }
.hero-lead { max-width: 780px; margin: 18px auto 26px; font-size: 17px; color: #52627a; }
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 760;
    box-shadow: 0 14px 34px rgba(70,139,223,.28);
    border: 1px solid rgba(70,139,223,.08);
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.download-btn:hover { transform: translateY(-1px); background: var(--primary-dark); box-shadow: 0 18px 42px rgba(70,139,223,.32); }
.security-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 18px; }
.security-tags span, .mini-tag {
    display: inline-flex;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,.82);
    border: 1px solid var(--line);
    color: #52627a;
    font-size: 13px;
}
.product-bento {
    margin: 30px auto 76px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 30px;
    background: linear-gradient(135deg, #ffffff, #f4f9ff);
    box-shadow: var(--shadow);
    display: grid;
    gap: 16px;
}
.product-main-card {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 420px;
    overflow: hidden;
    border-radius: 26px;
    background:
        radial-gradient(circle at center, rgba(70,139,223,.2), transparent 18rem),
        linear-gradient(145deg, #eef6ff, #ffffff);
}
.app-image { width: min(290px, 76vw); filter: drop-shadow(0 24px 34px rgba(32,79,143,.20)); }
.status-card {
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: rgba(255,255,255,.9);
    box-shadow: var(--shadow-soft);
}
.status-card strong { display: block; margin-bottom: 4px; color: #10213a; }
.status-card p { font-size: 14px; margin: 0; }
.floating-status { position: static; width: 100%; }
.section { padding: 54px 0; }
.section-head { max-width: 760px; margin-bottom: 24px; }
.section-head.center { text-align: center; margin-left: auto; margin-right: auto; }
.capability-grid, .scenario-grid, .faq-grid, .step-grid, .info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.card, .capability-card, .scenario-card, .faq-item, .category-card, .principle-card, .doc-card, .step-card {
    background: rgba(255,255,255,.88);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow-soft);
}
.capability-card .icon, .category-card .icon {
    width: 40px;
    height: 40px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    color: var(--primary-dark);
    background: var(--primary-soft);
    margin-bottom: 14px;
    font-weight: 800;
}
.card-link { display: inline-flex; margin-top: 8px; color: var(--primary-dark); font-weight: 720; }
.card-link::after { content: '→'; margin-left: 6px; }
.roadmap {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    position: relative;
}
.roadmap-step {
    position: relative;
    padding: 22px 20px 22px 72px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: #fff;
    box-shadow: var(--shadow-soft);
}
.roadmap-step .num {
    position: absolute;
    left: 20px;
    top: 22px;
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
}
.category-bento, .bento-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.category-card { min-height: 180px; }
.category-card.featured { background: linear-gradient(145deg, #ffffff, #eff6ff); }
.bento-card {
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 26px;
    background: #fff;
    box-shadow: var(--shadow-soft);
}
.bento-card.large { background: linear-gradient(145deg, #ffffff, #f0f7ff); }
.bento-card.small { min-height: 150px; }
.security-layout {
    display: grid;
    gap: 20px;
    align-items: start;
}
.principle-list { display: grid; gap: 12px; }
.principle-card { display: flex; gap: 12px; align-items: flex-start; }
.principle-card span {
    flex: 0 0 auto;
    width: 26px;
    height: 26px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-weight: 800;
}
.faq-item details { margin: 0; }
.faq-item summary { cursor: pointer; font-weight: 760; color: #142033; }
.faq-item p { margin-top: 12px; }
.cta-section {
    width: min(1160px, calc(100% - 32px));
    margin: 56px auto 82px;
    padding: 38px 22px;
    text-align: center;
    border-radius: 30px;
    border: 1px solid var(--line);
    background: linear-gradient(135deg, rgba(70,139,223,.13), rgba(255,255,255,.96));
    box-shadow: var(--shadow);
}
.page-hero { padding: 68px 0 28px; text-align: center; }
.page-hero h1 { font-size: clamp(34px, 6vw, 58px); }
.page-hero p { max-width: 760px; margin: 18px auto 0; }
.narrow { width: min(860px, calc(100% - 32px)); margin: 0 auto; }
.doc-page { padding: 58px 0 72px; }
.doc-hero {
    margin-bottom: 28px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 28px;
    background: linear-gradient(145deg, #ffffff, #f1f8ff);
    box-shadow: var(--shadow-soft);
}
.doc-hero h1 { font-size: clamp(32px, 6vw, 54px); margin-top: 14px; }
.doc-summary { max-width: 780px; margin-top: 16px; font-size: 17px; }
.doc-layout { display: grid; grid-template-columns: 1fr; gap: 18px; align-items: start; }
.doc-content {
    background: rgba(255,255,255,.92);
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 24px;
    box-shadow: var(--shadow-soft);
}
.doc-content h2 { font-size: 25px; margin-top: 12px; }
.doc-content ul, .doc-content ol { color: #52627a; padding-left: 22px; }
.doc-content li { margin-bottom: 8px; }
.doc-aside { display: grid; gap: 14px; }
.notice-card {
    padding: 20px;
    border-radius: 22px;
    border: 1px solid rgba(70,139,223,.2);
    background: var(--primary-faint);
}
.check-list { display: grid; gap: 10px; padding: 0; list-style: none; }
.check-list li { padding: 12px 14px; border-radius: 16px; background: #f6faff; border: 1px solid var(--line); }
.process-list { counter-reset: steps; display: grid; gap: 12px; padding: 0; list-style: none; }
.process-list li {
    counter-increment: steps;
    position: relative;
    padding: 16px 16px 16px 58px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
}
.process-list li::before {
    content: counter(steps);
    position: absolute;
    left: 16px;
    top: 16px;
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
}
.download-note { margin-top: 22px; text-align: center; }
.site-footer { background: #10213a; color: #d9e8fb; margin-top: 40px; }
.footer-inner { width: min(1160px, calc(100% - 32px)); margin: 0 auto; padding: 42px 0; display: grid; gap: 28px; }
.footer-brand p { max-width: 520px; color: #a8b9cf; margin-top: 14px; }
.footer-logo img { box-shadow: none; }
.footer-links { display: grid; gap: 22px; }
.footer-links div { display: grid; gap: 8px; }
.footer-links strong { color: #fff; }
.footer-links a { color: #a8b9cf; font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); color: #9fb1c8; text-align: center; padding: 18px; font-size: 13px; }
@media (min-width: 700px) {
    .capability-grid, .scenario-grid, .faq-grid, .step-grid, .info-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .category-bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-links { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 940px) {
    .nav-toggle-label { display: none; }
    .site-nav { display: flex; position: static; }
    .centered-hero { padding-top: 104px; }
    .product-bento { grid-template-columns: 1.35fr .65fr; align-items: stretch; padding: 22px; }
    .product-main-card { min-height: 560px; }
    .status-stack { display: grid; gap: 16px; }
    .floating-status { position: absolute; width: 210px; }
    .status-one { left: 38px; top: 54px; }
    .status-two { right: 42px; top: 88px; }
    .status-three { left: 56px; bottom: 58px; }
    .status-four { right: 54px; bottom: 48px; }
    .capability-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .roadmap { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; }
    .roadmap::before { content: ''; position: absolute; left: 6%; right: 6%; top: 39px; height: 2px; background: var(--line); }
    .roadmap-step { padding: 72px 16px 18px; min-height: 240px; }
    .roadmap-step .num { left: 16px; top: 20px; z-index: 1; }
    .roadmap-step:nth-child(even) { margin-top: 34px; }
    .category-bento { grid-template-columns: repeat(4, minmax(0, 1fr)); grid-auto-rows: minmax(168px, auto); }
    .category-card.featured { grid-column: span 2; grid-row: span 2; }
    .bento-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); grid-auto-rows: minmax(170px, auto); }
    .bento-card.large { grid-column: span 3; grid-row: span 2; }
    .bento-card.medium { grid-column: span 2; }
    .bento-card.small { grid-column: span 1; }
    .security-layout { grid-template-columns: .95fr 1.05fr; gap: 34px; }
    .doc-layout { grid-template-columns: minmax(0, 1fr) 310px; }
    .doc-content { padding: 32px; }
    .footer-inner { grid-template-columns: 1fr 1.3fr; align-items: start; }
}
@media (max-width: 420px) {
    .section, .centered-hero, .page-hero, .doc-page { width: min(100% - 24px, 1160px); }
    .header-inner { width: min(100% - 24px, 1160px); }
    .download-btn { width: 100%; }
    .cta-section { width: min(100% - 24px, 1160px); }
}