:root {
    --primary: rgb(70,139,223);
    --primary-dark: #245fba;
    --primary-soft: #eaf4ff;
    --ink: #10223d;
    --muted: #64748b;
    --line: #dce9f7;
    --bg: #f7fbff;
    --card: rgba(255,255,255,.84);
    --shadow: 0 20px 60px rgba(25, 87, 160, .10);
    --radius: 24px;
}
* { 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: radial-gradient(circle at 20% 0%, #e8f4ff 0, transparent 34%), linear-gradient(180deg, #ffffff 0%, #f5faff 46%, #ffffff 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: 50;
    background: rgba(255,255,255,.82);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(220,233,247,.82);
}
.header-inner, .footer-inner, .content-container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}
.header-inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.brand, .footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    letter-spacing: .02em;
}
.logo { width: 38px; height: 38px; border-radius: 12px; }
.brand-text { font-size: 17px; }
.nav-toggle {
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 999px;
    padding: 8px 14px;
    color: var(--ink);
    font-weight: 700;
}
.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}
.site-nav.is-open { display: flex; }
.site-nav a {
    padding: 10px 12px;
    border-radius: 14px;
    color: #52637a;
    font-size: 14px;
    font-weight: 650;
}
.site-nav a:hover, .site-nav a.active { color: var(--primary-dark); background: var(--primary-soft); }
.section { padding: 58px 0; }
.section-tight { padding: 34px 0; }
.section-title {
    margin: 0 0 14px;
    font-size: clamp(28px, 4vw, 48px);
    line-height: 1.12;
    letter-spacing: -.04em;
}
.section-kicker, .badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-dark);
    background: rgba(70,139,223,.10);
    border: 1px solid rgba(70,139,223,.16);
    padding: 7px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 760;
}
.section-lead { color: var(--muted); max-width: 760px; margin: 0 auto 28px; }
.centered-hero {
    padding: 70px 0 28px;
    text-align: center;
}
.centered-hero h1 {
    max-width: 980px;
    margin: 18px auto 18px;
    font-size: clamp(38px, 8vw, 82px);
    line-height: .98;
    letter-spacing: -.07em;
}
.centered-hero p { max-width: 780px; margin: 0 auto 28px; color: #53657c; font-size: 17px; }
.tag-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 18px; }
.tag {
    border: 1px solid var(--line);
    background: rgba(255,255,255,.76);
    border-radius: 999px;
    padding: 8px 12px;
    color: #52637a;
    font-size: 13px;
    font-weight: 650;
}
.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: 800;
    box-shadow: 0 14px 32px rgba(70,139,223,.22);
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 18px 40px rgba(70,139,223,.26); }
.product-bento {
    display: grid;
    gap: 16px;
    align-items: stretch;
}
.product-showcase {
    position: relative;
    min-height: 430px;
    border: 1px solid rgba(70,139,223,.14);
    border-radius: 32px;
    padding: 28px;
    overflow: hidden;
    background:
        linear-gradient(135deg, rgba(70,139,223,.12), rgba(255,255,255,.85) 42%, rgba(237,247,255,.95)),
        radial-gradient(circle at 60% 22%, rgba(70,139,223,.23), transparent 35%);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    justify-content: center;
}
.product-showcase:before {
    content: "";
    position: absolute;
    inset: 34px;
    border: 1px solid rgba(70,139,223,.13);
    border-radius: 28px;
}
.app-visual { position: relative; z-index: 2; max-height: 380px; margin: 0 auto; filter: drop-shadow(0 30px 42px rgba(23,67,125,.18)); }
.status-stack { display: grid; gap: 16px; }
.status-card, .bento-card, .category-card, .scenario-card, .faq-item, .principle-card, .doc-card, .step-card, .data-card {
    background: var(--card);
    border: 1px solid rgba(210,226,244,.88);
    border-radius: var(--radius);
    box-shadow: 0 12px 36px rgba(32, 84, 142, .07);
}
.status-card { padding: 20px; }
.status-card small, .data-card small { color: var(--primary-dark); font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.status-card strong { display: block; margin: 7px 0 4px; font-size: 19px; }
.status-card p, .bento-card p, .category-card p, .scenario-card p, .doc-card p, .step-card p, .data-card p { margin: 0; color: var(--muted); }
.feature-grid, .category-grid, .scenario-grid, .faq-grid, .data-grid { display: grid; gap: 16px; }
.data-card { padding: 20px; }
.data-card strong { display: block; margin-top: 8px; font-size: 19px; }
.roadmap {
    display: grid;
    gap: 16px;
    counter-reset: road;
}
.roadmap-item {
    position: relative;
    padding: 22px;
    border-radius: 24px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 12px 34px rgba(29,76,132,.06);
}
.roadmap-number {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    margin-bottom: 14px;
}
.roadmap-item h3, .category-card h3, .bento-card h3, .scenario-card h3, .doc-card h3, .step-card h3 { margin: 0 0 8px; line-height: 1.25; }
.inline-link {
    display: inline-flex;
    margin-top: 12px;
    color: var(--primary-dark);
    font-weight: 800;
}
.category-bento, .bento-grid {
    display: grid;
    gap: 16px;
}
.category-card, .bento-card { padding: 22px; min-height: 170px; }
.category-card.is-large, .bento-card.is-large {
    background: linear-gradient(135deg, #ffffff, #edf7ff);
}
.bento-card .chip {
    display: inline-flex;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(70,139,223,.10);
    color: var(--primary-dark);
    font-size: 12px;
    font-weight: 800;
    margin-bottom: 14px;
}
.security-layout {
    display: grid;
    gap: 20px;
    align-items: center;
}
.security-panel {
    padding: 26px;
    border-radius: 30px;
    background: linear-gradient(145deg, rgba(70,139,223,.12), rgba(255,255,255,.92));
    border: 1px solid rgba(70,139,223,.14);
    box-shadow: var(--shadow);
}
.principle-list { display: grid; gap: 12px; margin-top: 18px; }
.principle-card { padding: 16px; display: flex; gap: 12px; align-items: flex-start; }
.principle-card span { color: var(--primary-dark); font-weight: 900; }
.scenario-card { padding: 22px; }
.faq-item { padding: 22px; }
.faq-item h3 { margin: 0 0 8px; font-size: 18px; }
.faq-item p { margin: 0; color: var(--muted); }
.cta-section {
    margin: 34px auto 60px;
    padding: 42px 22px;
    text-align: center;
    border-radius: 32px;
    background: linear-gradient(135deg, #edf7ff, #ffffff 54%, #eaf4ff);
    border: 1px solid rgba(70,139,223,.14);
    box-shadow: var(--shadow);
}
.cta-section h2 { margin: 0 0 12px; font-size: clamp(28px, 4vw, 46px); letter-spacing: -.04em; }
.cta-section p { max-width: 690px; margin: 0 auto 22px; color: var(--muted); }
.page-hero {
    padding: 58px 0 28px;
}
.page-hero-inner {
    width: min(920px, calc(100% - 32px));
    margin: 0 auto;
    text-align: center;
}
.page-hero h1 { margin: 16px 0 14px; font-size: clamp(34px, 6vw, 64px); line-height: 1.02; letter-spacing: -.06em; }
.page-hero p { color: var(--muted); margin: 0 auto; max-width: 760px; }
.doc-layout {
    width: min(1040px, calc(100% - 32px));
    margin: 0 auto 60px;
    display: grid;
    gap: 20px;
}
.doc-main {
    background: rgba(255,255,255,.82);
    border: 1px solid var(--line);
    border-radius: 30px;
    padding: 24px;
    box-shadow: var(--shadow);
}
.doc-main p { color: #52637a; }
.doc-aside { display: grid; gap: 16px; align-content: start; }
.doc-card { padding: 20px; }
.process-steps { display: grid; gap: 14px; margin: 24px 0; }
.step-card { padding: 18px; }
.notice-box {
    margin: 24px 0;
    padding: 18px;
    border-radius: 20px;
    background: #f0f7ff;
    border: 1px solid rgba(70,139,223,.18);
    color: #36516d;
}
.check-list { padding-left: 0; list-style: none; display: grid; gap: 10px; }
.check-list li {
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #fff;
    color: #52637a;
}
.site-footer {
    background: #ffffff;
    border-top: 1px solid var(--line);
    padding: 34px 0 20px;
}
.footer-inner { display: grid; gap: 24px; }
.footer-logo { width: 40px; height: 40px; border-radius: 12px; }
.footer-brand p { margin: 2px 0 0; color: var(--muted); }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px; }
.footer-links a { color: #52637a; font-weight: 650; }
.footer-bottom { width: min(1120px, calc(100% - 32px)); margin: 22px auto 0; color: #8390a3; font-size: 13px; }
@media (min-width: 720px) {
    .feature-grid, .data-grid, .scenario-grid, .faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .category-bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .process-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 960px) {
    .nav-toggle { display: none; }
    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 4px;
        padding: 0;
        background: transparent;
        border: 0;
        box-shadow: none;
    }
    .product-bento { grid-template-columns: minmax(0, 1.6fr) minmax(260px, .7fr); }
    .data-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .roadmap { grid-template-columns: repeat(6, minmax(0, 1fr)); align-items: stretch; }
    .roadmap-item:nth-child(even) { transform: translateY(22px); }
    .category-bento { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .category-card.is-large { grid-column: span 2; }
    .bento-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
    .bento-card { grid-column: span 2; }
    .bento-card.is-large { grid-column: span 3; min-height: 230px; }
    .bento-card.is-medium { grid-column: span 3; }
    .security-layout { grid-template-columns: 1fr .9fr; }
    .scenario-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
    .scenario-card { grid-column: span 1; }
    .scenario-card.is-wide { grid-column: span 2; }
    .doc-layout { grid-template-columns: minmax(0, 1fr) 300px; }
    .doc-main { padding: 34px; }
    .footer-inner { grid-template-columns: 1fr auto; align-items: center; }
}