:root {
    --primary: rgb(213, 5, 5);
    --header-red: rgb(180, 4, 4);
    --deep-red: rgb(155, 3, 3);
    --text: #222;
    --muted: #6b7280;
    --light: #f6f7f9;
    --line: #e8e8ec;
    --card: #ffffff;
    --dark: #111111;
}
* { 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(--text);
    background: #fff;
    line-height: 1.75;
    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: relative; z-index: 20; background: #fff; box-shadow: 0 6px 18px rgba(0,0,0,.06); }
.desktop-topbar, .desktop-header { display: none; }
.mobile-header {
    height: 64px;
    display: grid;
    grid-template-columns: 44px 1fr auto;
    align-items: center;
    gap: 10px;
    padding: 0 14px;
    background: #fff;
    border-bottom: 3px solid var(--header-red);
}
.menu-button {
    width: 42px;
    height: 42px;
    border: 0;
    background: transparent;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    padding: 0 8px;
    cursor: pointer;
}
.menu-button span { height: 2px; width: 24px; background: var(--dark); border-radius: 10px; }
.mobile-logo { justify-self: center; }
.mobile-logo img { height: 36px; width: auto; }
.top-action, .main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 20px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    letter-spacing: .02em;
    box-shadow: 0 10px 24px rgba(213,5,5,.2);
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.top-action:hover, .main-btn:hover { background: var(--deep-red); transform: translateY(-1px); box-shadow: 0 12px 28px rgba(180,4,4,.25); }
.mobile-nav {
    display: none;
    padding: 8px 16px 14px;
    background: #fff;
    border-bottom: 1px solid var(--line);
}
.mobile-nav.open { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.mobile-nav a {
    padding: 11px 12px;
    border-radius: 12px;
    background: #f8f8f8;
    font-weight: 700;
    font-size: 14px;
    text-align: center;
}
.mobile-nav a.active { background: rgba(213,5,5,.1); color: var(--primary); }
.section { padding: 56px 0; }
.section.light { background: var(--light); }
.section-title { margin: 0 0 12px; font-size: clamp(26px, 5vw, 42px); line-height: 1.18; color: var(--dark); }
.section-lead { margin: 0 0 28px; color: #4b5563; font-size: 16px; max-width: 780px; }
.official-hero {
    background: linear-gradient(180deg, #fff 0%, #fff4f4 100%);
    padding: 44px 0 36px;
    overflow: hidden;
}
.hero-grid { display: grid; gap: 30px; align-items: center; }
.hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 800;
    background: rgba(213,5,5,.08);
    border: 1px solid rgba(213,5,5,.16);
    border-radius: 999px;
    padding: 6px 14px;
    margin-bottom: 16px;
}
.hero-title { margin: 0; font-size: clamp(34px, 8vw, 58px); line-height: 1.08; color: #111; letter-spacing: -.04em; }
.hero-text { margin: 18px 0 24px; color: #4b5563; font-size: 17px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.hero-tags span { padding: 8px 12px; background: #fff; border: 1px solid rgba(213,5,5,.16); border-radius: 999px; color: #3f3f46; font-weight: 700; font-size: 13px; }
.hero-visual { position: relative; }
.hero-visual img { border-radius: 26px; box-shadow: 0 24px 50px rgba(0,0,0,.14); border: 8px solid #fff; }
.hero-badge { position: absolute; left: 12px; bottom: 12px; padding: 12px 16px; background: rgba(255,255,255,.92); border-radius: 16px; box-shadow: 0 12px 28px rgba(0,0,0,.12); font-weight: 800; color: var(--primary); }
.official-entry { background: #fff; }
.category-main-grid { display: grid; gap: 16px; }
.category-sub-grid { display: grid; gap: 14px; margin-top: 16px; }
.category-main-card, .category-sub-card, .focus-card, .info-card, .feature-card, .faq-item, .page-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 22px;
    box-shadow: 0 10px 30px rgba(17,17,17,.04);
}
.category-main-card { min-height: 240px; display: flex; flex-direction: column; justify-content: space-between; }
.category-main-card h3, .category-sub-card h3, .focus-card h3, .info-card h3, .feature-card h3, .page-card h3 { margin: 0 0 10px; font-size: 22px; color: #111; }
.category-main-card p, .category-sub-card p, .focus-card p, .info-card p, .feature-card p, .page-card p { margin: 0 0 14px; color: #565d6a; }
.card-link { color: var(--primary); font-weight: 800; display: inline-flex; align-items: center; gap: 6px; }
.card-link:after { content: "›"; font-size: 20px; line-height: 1; }
.label { display: inline-flex; width: fit-content; padding: 4px 10px; border-radius: 999px; background: rgba(213,5,5,.1); color: var(--primary); font-weight: 800; font-size: 13px; margin-bottom: 14px; }
.focus-grid, .security-grid, .page-grid { display: grid; gap: 16px; }
.focus-card { position: relative; overflow: hidden; }
.focus-card:before { content: ""; position: absolute; left: 0; top: 0; width: 5px; height: 100%; background: var(--primary); }
.info-split { display: grid; gap: 18px; }
.info-column { background: #fff; border: 1px solid var(--line); border-radius: 24px; padding: 22px; }
.info-list { display: grid; gap: 12px; }
.info-list .info-card { box-shadow: none; border-radius: 16px; padding: 18px; }
.info-visual { margin-top: 16px; border-radius: 20px; overflow: hidden; border: 1px solid var(--line); }
.showcase-grid, .data-grid, .app-grid { display: grid; gap: 24px; align-items: center; }
.showcase-image img, .app-image img, .data-visual img { border-radius: 24px; box-shadow: 0 18px 40px rgba(0,0,0,.1); }
.check-list { padding: 0; margin: 18px 0 0; list-style: none; display: grid; gap: 10px; }
.check-list li { position: relative; padding-left: 28px; color: #374151; }
.check-list li:before { content: ""; position: absolute; left: 0; top: .65em; width: 10px; height: 10px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 5px rgba(213,5,5,.1); }
.data-cards { display: grid; gap: 14px; margin-top: 16px; }
.data-card { border: 1px solid rgba(213,5,5,.18); background: #fff; border-radius: 18px; padding: 18px; }
.data-card strong { display: block; color: var(--primary); font-size: 20px; margin-bottom: 6px; }
.security-grid .feature-card { min-height: 190px; }
.responsible-box {
    background: #f7f7f8;
    border-left: 6px solid var(--primary);
    border-radius: 18px;
    padding: 24px;
    box-shadow: inset 0 0 0 1px #ececef;
}
.responsible-box p { margin: 0; color: #424750; }
.faq-list { display: grid; gap: 14px; }
.faq-item h3 { margin: 0 0 8px; font-size: 19px; }
.faq-item p { margin: 0; color: #565d6a; }
.cta-box {
    background: linear-gradient(135deg, rgba(213,5,5,.1), rgba(213,5,5,.03));
    border: 1px solid rgba(213,5,5,.16);
    border-radius: 26px;
    padding: 28px;
    text-align: center;
}
.cta-box h2 { margin: 0 0 10px; font-size: clamp(24px, 5vw, 38px); }
.cta-box p { margin: 0 auto 18px; color: #4b5563; max-width: 720px; }
.page-hero { padding: 48px 0; background: linear-gradient(180deg, #fff6f6, #fff); border-bottom: 1px solid #f0dada; }
.page-hero .breadcrumb { color: var(--primary); font-weight: 800; margin-bottom: 12px; }
.page-hero h1 { margin: 0 0 16px; font-size: clamp(32px, 7vw, 52px); line-height: 1.12; color: #111; }
.page-hero p { margin: 0; color: #4b5563; max-width: 860px; font-size: 17px; }
.content-block { display: grid; gap: 18px; margin-top: 26px; }
.notice-list { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 22px; }
.notice-list h2 { margin: 0 0 12px; }
.notice-list ul { margin: 0; padding-left: 20px; color: #4b5563; }
.notice-list li + li { margin-top: 8px; }
.steps { counter-reset: step; display: grid; gap: 14px; }
.step { position: relative; padding: 18px 18px 18px 58px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.step:before { counter-increment: step; content: counter(step); position: absolute; left: 18px; top: 18px; width: 28px; height: 28px; border-radius: 50%; background: var(--primary); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-weight: 800; }
.site-footer { background: #141414; color: #fff; padding: 42px 0 24px; }
.footer-grid { display: grid; gap: 28px; }
.footer-brand img { height: 42px; margin-bottom: 12px; }
.footer-brand p, .footer-note p { color: #d1d5db; margin: 0; }
.footer-links { display: grid; gap: 8px; }
.footer-links h3 { margin: 0 0 8px; font-size: 18px; }
.footer-links a { color: #e5e7eb; }
.footer-links a:hover { color: #fff; }
.footer-note { border-top: 1px solid rgba(255,255,255,.12); margin-top: 28px; padding-top: 18px; display: grid; gap: 8px; font-size: 13px; }
@media (min-width: 680px) {
    .category-main-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .category-sub-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .focus-grid, .security-grid, .page-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .data-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: 1.4fr repeat(3, 1fr); }
}
@media (min-width: 960px) {
    .mobile-header, .mobile-nav { display: none !important; }
    .desktop-topbar { display: block; background: var(--header-red); color: #fff; font-size: 13px; }
    .topbar-inner { height: 34px; display: flex; align-items: center; justify-content: space-between; }
    .desktop-header { display: block; background: #fff; border-bottom: 1px solid var(--line); }
    .desktop-inner { height: 78px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 24px; }
    .desktop-logo img { height: 46px; width: auto; }
    .desktop-nav { display: flex; align-items: center; justify-content: center; gap: 8px; }
    .desktop-nav a { padding: 10px 13px; border-radius: 999px; font-weight: 800; color: #2f343c; white-space: nowrap; }
    .desktop-nav a.active, .desktop-nav a:hover { color: var(--primary); background: rgba(213,5,5,.08); }
    .desktop-tools { display: flex; align-items: center; gap: 14px; }
    .search-icon { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 50%; position: relative; display: inline-block; }
    .search-icon:before { content: ""; position: absolute; left: 11px; top: 10px; width: 12px; height: 12px; border: 2px solid #333; border-radius: 50%; }
    .search-icon:after { content: ""; position: absolute; left: 23px; top: 23px; width: 9px; height: 2px; background: #333; transform: rotate(45deg); border-radius: 2px; }
    .official-hero { padding: 68px 0 54px; }
    .hero-grid { grid-template-columns: 1.02fr .98fr; gap: 54px; }
    .category-main-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .category-main-card:nth-child(1), .category-main-card:nth-child(4) { transform: translateY(16px); }
    .category-sub-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .focus-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .info-split { grid-template-columns: 1fr 1fr; }
    .showcase-grid, .data-grid, .app-grid { grid-template-columns: 1fr 1fr; }
    .data-grid { grid-template-columns: 1.05fr .95fr; }
    .app-grid { grid-template-columns: .95fr 1.05fr; }
    .security-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .page-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .content-block.two-col { grid-template-columns: 1.08fr .92fr; align-items: start; }
    .section { padding: 74px 0; }
    .cta-box { padding: 42px; }
}