:root {
    --primary: rgb(70,139,223);
    --primary-strong: rgb(42,107,198);
    --primary-soft: rgba(70,139,223,0.12);
    --ink: #13233a;
    --muted: #627089;
    --line: #dbe8f7;
    --panel: #ffffff;
    --soft: #f5f9ff;
    --deep: #0e2a4d;
    --radius: 22px;
    --shadow: 0 18px 50px rgba(28, 82, 142, 0.10);
}

* { 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, #f7fbff 0%, #ffffff 36%, #f6faff 100%);
    line-height: 1.72;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,0.88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(219,232,247,0.8);
}
.nav-wrap {
    width: min(1160px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 760; color: var(--deep); letter-spacing: -0.02em; }
.logo-img { width: 38px; height: 38px; border-radius: 12px; }
.nav-toggle {
    border: 1px solid var(--line);
    background: #fff;
    width: 42px;
    height: 42px;
    border-radius: 14px;
    font-size: 20px;
    color: var(--deep);
}
.main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 10px;
}
.main-nav.open { display: grid; gap: 4px; }
.main-nav a {
    padding: 12px 14px;
    border-radius: 12px;
    color: #4b5d76;
    font-size: 15px;
}
.main-nav a.active, .main-nav a:hover { background: var(--primary-soft); color: var(--primary-strong); }

.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.narrow { width: min(860px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: 56px 0; }
.section-head { margin-bottom: 24px; }
.eyebrow, .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary-strong);
    background: var(--primary-soft);
    border: 1px solid rgba(70,139,223,0.18);
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}
h1, h2, h3 { line-height: 1.18; margin: 0; color: var(--deep); letter-spacing: -0.035em; }
h1 { font-size: clamp(36px, 8vw, 72px); }
h2 { font-size: clamp(28px, 5vw, 44px); }
h3 { font-size: 20px; }
p { margin: 0; color: var(--muted); }
.lead { font-size: 18px; color: #53647b; }

.centered-hero {
    padding: 74px 0 34px;
    text-align: center;
    background:
        radial-gradient(circle at 50% 0%, rgba(70,139,223,0.20), transparent 34%),
        linear-gradient(180deg, #f4f9ff, #fff);
}
.hero-inner { width: min(900px, calc(100% - 32px)); margin: 0 auto; display: grid; gap: 22px; justify-items: center; }
.hero-tags { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; }
.hero-tags span, .pill {
    border: 1px solid var(--line);
    background: rgba(255,255,255,0.78);
    color: #41546d;
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 14px;
}
.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 12px 28px rgba(70,139,223,0.26);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    border: 0;
}
.download-btn:hover { transform: translateY(-1px); background: var(--primary-strong); box-shadow: 0 16px 32px rgba(70,139,223,0.32); }

.product-bento { padding: 28px 0 64px; }
.product-shell {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 18px;
}
.product-card {
    background: linear-gradient(145deg, #ffffff, #edf6ff);
    border: 1px solid var(--line);
    border-radius: 28px;
    min-height: 460px;
    padding: 24px;
    box-shadow: var(--shadow);
    display: grid;
    place-items: center;
    overflow: hidden;
    position: relative;
}
.product-card::before {
    content: "";
    position: absolute;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: rgba(70,139,223,0.14);
    filter: blur(10px);
}
.product-card img { position: relative; max-height: 420px; object-fit: contain; filter: drop-shadow(0 28px 36px rgba(28,82,142,0.16)); }
.status-grid { display: grid; gap: 14px; }
.status-card, .card, .category-card, .scenario-card, .faq-item, .principle-card, .step-card, .doc-card {
    background: rgba(255,255,255,0.84);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 10px 34px rgba(28,82,142,0.07);
}
.status-card { padding: 18px; }
.status-card strong { display: block; color: var(--deep); margin-bottom: 6px; }

.grid-4, .scenario-grid { display: grid; gap: 16px; }
.card { padding: 22px; }
.card h3, .category-card h3, .scenario-card h3, .doc-card h3 { margin-bottom: 8px; }
.card-link { color: var(--primary-strong); font-weight: 760; display: inline-block; margin-top: 14px; }

.roadmap {
    display: grid;
    gap: 16px;
    counter-reset: road;
}
.road-item {
    position: relative;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 22px;
    padding: 20px;
    box-shadow: 0 10px 28px rgba(28,82,142,0.06);
}
.road-num {
    width: 38px;
    height: 38px;
    display: inline-grid;
    place-items: center;
    border-radius: 13px;
    color: #fff;
    background: var(--primary);
    font-weight: 800;
    margin-bottom: 12px;
}
.road-item h3 { margin-bottom: 8px; }

.category-bento, .bento-grid { display: grid; gap: 16px; }
.category-card { padding: 22px; transition: transform .2s ease, border-color .2s ease; }
.category-card:hover { transform: translateY(-2px); border-color: rgba(70,139,223,0.42); }
.category-card.large { background: linear-gradient(145deg, #ffffff, #eef6ff); }
.bento-card {
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 24px;
    background: #fff;
    box-shadow: 0 10px 34px rgba(28,82,142,0.07);
}
.bento-card.big { background: linear-gradient(145deg, #ffffff, #eef6ff); }
.bento-card.small { background: #f8fbff; }
.bento-card h3 { margin-bottom: 10px; }

.security-layout { display: grid; gap: 18px; align-items: start; }
.security-copy { display: grid; gap: 16px; }
.security-panel {
    background: linear-gradient(155deg, #ffffff, #edf6ff);
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 24px;
    box-shadow: var(--shadow);
}
.principle-card { padding: 16px; margin-top: 12px; }
.principle-card strong { color: var(--deep); display: block; margin-bottom: 4px; }
.scenario-card { padding: 20px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { padding: 18px 20px; }
.faq-item summary { cursor: pointer; color: var(--deep); font-weight: 760; }
.faq-item p { margin-top: 10px; }
.cta-section {
    width: min(1120px, calc(100% - 32px));
    margin: 16px auto 72px;
    padding: 44px 22px;
    text-align: center;
    display: grid;
    gap: 18px;
    justify-items: center;
    border: 1px solid var(--line);
    border-radius: 30px;
    background: linear-gradient(135deg, #eef6ff, #ffffff 58%, #f5faff);
    box-shadow: var(--shadow);
}

.page-hero { padding: 62px 0 34px; background: radial-gradient(circle at top, rgba(70,139,223,0.16), transparent 38%); }
.page-hero .narrow { display: grid; gap: 16px; }
.doc-layout { padding: 34px 0 72px; }
.doc-grid { width: min(1040px, calc(100% - 32px)); margin: 0 auto; display: grid; gap: 18px; }
.article-panel, .side-panel {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 26px;
    box-shadow: var(--shadow);
    padding: 24px;
}
.article-panel { display: grid; gap: 18px; }
.article-panel h2 { font-size: clamp(24px, 4vw, 34px); }
.doc-card { padding: 18px; }
.check-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.check-list li { padding: 12px 14px; border-radius: 16px; background: #f6faff; color: #465873; border: 1px solid #e4eef9; }
.step-list { display: grid; gap: 12px; }
.inline-step { display: grid; grid-template-columns: 38px 1fr; gap: 12px; align-items: start; }
.inline-step span { width: 38px; height: 38px; border-radius: 13px; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary-strong); font-weight: 800; }
.download-only { margin-top: 6px; }

.download-steps { display: grid; gap: 14px; margin-top: 18px; }
.download-step { padding: 18px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.about-values { display: grid; gap: 16px; }

.site-footer { background: #f2f7ff; border-top: 1px solid var(--line); }
.footer-inner { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding: 38px 0; display: grid; gap: 22px; }
.footer-brand { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; color: var(--deep); }
.footer-brand img { width: 34px; height: 34px; border-radius: 10px; }
.footer-links { display: grid; gap: 10px; }
.footer-links a { color: #52657e; }
.footer-bottom { border-top: 1px solid var(--line); padding: 16px; text-align: center; color: #708098; font-size: 14px; }

@media (min-width: 680px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .scenario-grid { grid-template-columns: repeat(2, 1fr); }
    .category-bento { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 920px) {
    .nav-toggle { display: none; }
    .main-nav { display: flex; position: static; border: 0; box-shadow: none; padding: 0; background: transparent; align-items: center; gap: 2px; }
    .main-nav a { padding: 9px 12px; }
    .centered-hero { padding: 110px 0 46px; }
    .product-shell { grid-template-columns: 1.45fr .75fr; align-items: stretch; }
    .product-card { min-height: 560px; padding: 34px; }
    .status-grid { grid-template-rows: repeat(4, 1fr); }
    .grid-4 { grid-template-columns: repeat(4, 1fr); }
    .roadmap { grid-template-columns: repeat(6, 1fr); align-items: stretch; }
    .road-item:nth-child(even) { margin-top: 42px; }
    .category-bento { grid-template-columns: repeat(4, 1fr); grid-auto-flow: dense; }
    .category-card.large { grid-column: span 2; grid-row: span 2; min-height: 210px; }
    .bento-grid { grid-template-columns: repeat(4, 1fr); }
    .bento-card.big { grid-column: span 2; min-height: 230px; }
    .bento-card.medium { grid-column: span 2; }
    .security-layout { grid-template-columns: 1fr .9fr; gap: 38px; }
    .scenario-grid { grid-template-columns: repeat(5, 1fr); }
    .scenario-card:nth-child(1), .scenario-card:nth-child(2) { grid-column: span 2; }
    .scenario-card:nth-child(3) { grid-column: span 1; }
    .doc-grid { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
    .footer-inner { grid-template-columns: 1fr 320px; }
    .about-values { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 420px) {
    .nav-wrap, .container, .narrow, .product-shell, .doc-grid, .cta-section { width: min(100% - 24px, 1120px); }
    .brand span { font-size: 15px; }
    .section { padding: 42px 0; }
    .download-btn { width: 100%; max-width: 320px; }
    .product-card { min-height: 380px; }
}