:root {
    --bg: #E6EBF2;
    --surface: #FFFFFF;
    --surface-soft: #F5F7FB;
    --surface-muted: #EEF2F7;
    --border: rgba(40, 156, 255, 0.16);
    --primary: #289CFF;
    --primary-deep: #167BD8;
    --text: #243447;
    --muted: #66788A;
    --shadow: 0 14px 36px rgba(56, 92, 138, 0.10);
    --radius: 20px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.75;
    overflow-x: hidden;
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
.skip-link { position: fixed; left: 12px; top: -60px; z-index: 20000; padding: 10px 16px; background: #fff; border-radius: 10px; color: var(--primary); }
.skip-link:focus { top: 12px; }
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 500;
    background: rgba(245,247,251,0.94);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(56,92,138,0.10);
}
.header-inner {
    width: min(1480px, calc(100% - 40px));
    margin: 0 auto;
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.logo { flex: 0 0 auto; }
.logo img { max-height: 52px; width: auto; }
.nav-core { display: flex; align-items: center; justify-content: center; gap: 24px; white-space: nowrap; flex-wrap: nowrap; }
.nav-core a { position: relative; padding: 8px 2px; color: #4E5F7A; font-weight: 700; }
.nav-core a:hover, .nav-core a.active { color: var(--primary); }
.nav-core a.active::after { content: ""; position: absolute; left: 50%; bottom: -9px; width: 28px; height: 3px; border-radius: 999px; background: var(--primary); transform: translateX(-50%); }
.main-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 24px; border-radius: 999px; background: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%); color: #fff; font-weight: 800; box-shadow: 0 10px 22px rgba(36,155,255,.24); transition: transform .2s ease, box-shadow .2s ease; }
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(36,155,255,.30); }
.header-register { flex: 0 0 auto; }
.mobile-menu-button { display: none; width: 42px; height: 42px; border: 1px solid var(--border); border-radius: 12px; background: #fff; padding: 10px; }
.mobile-menu-button span { display: block; height: 2px; margin: 4px 0; border-radius: 2px; background: var(--primary); }
.site-shell {
    width: min(1360px, calc(100% - 140px));
    margin: 0 auto;
    padding: 104px 0 56px;
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
}
.side-channel { position: sticky; top: 104px; max-height: calc(100vh - 128px); overflow: auto; padding: 16px; background: rgba(255,255,255,0.92); border: 1px solid var(--border); border-radius: 18px; box-shadow: var(--shadow); }
.side-channel-title { padding: 4px 10px 12px; color: var(--text); font-weight: 800; }
.side-channel nav { display: grid; gap: 5px; }
.side-channel a { display: block; padding: 8px 11px; border-radius: 12px; color: var(--muted); font-size: 14px; }
.side-channel a:hover, .side-channel a.active { color: var(--primary); background: rgba(40,156,255,0.10); font-weight: 700; }
.page-content { min-width: 0; }
.floating-service { position: fixed; right: 18px; top: 42%; z-index: 420; display: grid; gap: 8px; }
.floating-service a, .floating-service button { min-width: 54px; padding: 10px 8px; text-align: center; border-radius: 14px; background: #fff; color: var(--primary); border: 1px solid var(--border); box-shadow: 0 14px 30px rgba(56,92,138,.12); font-size: 13px; font-weight: 700; }
.floating-service a.register-link { background: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%); color: #fff; }
.page-hero, .section-box, .card, .zone-card, .info-card, .review-card, .faq-item, .notice-bar { background: rgba(255,255,255,0.92); border: 1px solid var(--border); box-shadow: var(--shadow); }
.page-hero { position: relative; overflow: hidden; margin-bottom: 24px; padding: 48px; border-radius: 26px; }
.page-hero::before { content: ""; position: absolute; right: -90px; top: -130px; width: 320px; height: 320px; border-radius: 50%; background: radial-gradient(circle, rgba(50,209,246,.26), rgba(40,156,255,0)); }
.page-hero > * { position: relative; z-index: 1; }
.eyebrow { display: inline-flex; padding: 5px 12px; border-radius: 999px; color: var(--primary); background: rgba(40,156,255,.10); font-weight: 800; font-size: 13px; letter-spacing: .08em; }
h1, h2, h3, .section-title { color: var(--primary); line-height: 1.35; }
h1 { margin: 14px 0 14px; font-size: clamp(30px, 4vw, 48px); }
h2 { font-size: clamp(22px, 3vw, 30px); }
h3 { font-size: 19px; }
.page-hero p { max-width: 780px; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-weight: 800; }
.text-link::after { content: "→"; }
.section-box { margin: 24px 0; padding: 30px; border-radius: var(--radius); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 18px; }
.section-head h2 { margin: 0; }
.section-head p { max-width: 700px; margin: 0; color: var(--muted); }
.grid-2, .grid-3, .grid-4, .grid-5 { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.grid-5 { grid-template-columns: repeat(5, minmax(0,1fr)); }
.card, .zone-card, .info-card, .review-card { padding: 22px; border-radius: 18px; }
.card h3, .zone-card h3, .info-card h3, .review-card h3 { margin: 0 0 10px; }
.card p, .zone-card p, .info-card p, .review-card p { margin: 0 0 12px; color: var(--muted); }
.card .text-link, .zone-card .text-link { margin-top: 6px; }
.media-split { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr); gap: 24px; align-items: center; }
.media-split.reverse { grid-template-columns: minmax(300px, .85fr) minmax(0, 1.15fr); }
.media-split.reverse .media-copy { order: 2; }
.media-split.reverse .media-frame { order: 1; }
.media-frame { min-height: 240px; display: flex; align-items: center; justify-content: center; padding: 14px; border-radius: 18px; background: var(--surface-soft); overflow: hidden; }
.content-img, .zone-card img, .app-section img { width: 100%; max-height: 300px; object-fit: contain; }
.media-copy p { color: var(--muted); }
.quick-links { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 12px; }
.quick-link { min-height: 120px; padding: 18px; border-radius: 16px; background: var(--surface-soft); border: 1px solid var(--border); transition: transform .2s ease, background .2s ease; }
.quick-link:hover { transform: translateY(-3px); background: #fff; }
.quick-link strong { display: block; color: var(--primary); }
.quick-link span { display: block; margin-top: 7px; color: var(--muted); font-size: 14px; }
.banner-slider { width: 100%; margin: 0 0 30px; height: clamp(300px, 31vw, 400px); border-radius: 22px; background: #fff; box-shadow: 0 18px 40px rgba(56,92,138,.12); overflow: hidden; position: relative; z-index: 1; }
.banner-slider .slide { display: none; width: 100%; height: 100%; }
.banner-slider .slide.active { display: block; }
.banner-slider img { width: 100%; height: 100%; object-fit: contain; background: #fff; }
.banner-caption, .banner-text, .slide-title, .slide-desc, .slide-content, .slide-card, .banner-card { display: none !important; }
.slider-arrow { position: absolute; top: 50%; z-index: 3; width: 44px; height: 44px; transform: translateY(-50%); border: none; border-radius: 999px; background: rgba(255,255,255,.88); color: var(--primary); box-shadow: 0 8px 20px rgba(56,92,138,.16); font-size: 28px; line-height: 1; }
.slider-arrow.prev { left: 16px; }
.slider-arrow.next { right: 16px; }
.slider-dots { position: absolute; left: 50%; bottom: 14px; z-index: 3; display: flex; gap: 8px; transform: translateX(-50%); }
.slider-dots button { width: 10px; height: 10px; padding: 0; border: none; border-radius: 50%; background: rgba(40,156,255,.24); }
.slider-dots button.active { background: var(--primary); }
.product-matrix { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.product-matrix .card:first-child { grid-column: span 2; }
.review-card blockquote { margin: 0; color: var(--muted); }
.review-card cite { display: block; margin-top: 14px; color: var(--text); font-style: normal; font-weight: 800; }
.faq-list { display: grid; gap: 12px; }
.faq-item { padding: 20px 22px; border-radius: 16px; }
.faq-item summary { cursor: pointer; color: var(--text); font-weight: 800; }
.faq-item p { margin: 12px 0 0; color: var(--muted); }
.notice-bar { margin: 24px 0; padding: 22px 24px; border-radius: 18px; border-left: 4px solid var(--primary); }
.notice-bar strong { color: var(--primary); }
.list-clean { margin: 0; padding-left: 20px; color: var(--muted); }
.list-clean li + li { margin-top: 8px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { padding: 5px 10px; border-radius: 999px; background: rgba(40,156,255,.10); color: var(--primary); font-size: 13px; font-weight: 700; }
.site-footer { background: #243447; color: #EAF3FF; }
.footer-inner { width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 46px 0 28px; display: grid; grid-template-columns: 1.1fr 1.9fr; gap: 50px; }
.footer-brand img { max-height: 54px; width: auto; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 470px; color: #BFD0E3; }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 24px; }
.footer-links h2 { margin: 0 0 12px; color: #fff; font-size: 17px; }
.footer-links a { display: block; padding: 5px 0; color: #BFD0E3; }
.footer-links a:hover { color: #fff; }
.compliance-note { width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 20px 0; border-top: 1px solid rgba(234,243,255,.14); color: #BFD0E3; font-size: 14px; }
.compliance-note p { margin: 0; }
.footer-bottom { padding: 18px 20px; text-align: center; border-top: 1px solid rgba(234,243,255,.10); color: #9FB3C8; font-size: 13px; }
.mobile-drawer { position: fixed; left: 0; top: 0; bottom: 0; z-index: 10000; width: min(84vw, 320px); padding: 18px; background: #fff; box-shadow: 20px 0 50px rgba(36,52,71,.22); transform: translateX(-105%); transition: transform .25s ease; overflow-y: auto; }
.drawer-open .mobile-drawer { transform: translateX(0); }
.drawer-overlay { position: fixed; inset: 0; z-index: 9999; background: rgba(36,52,71,.46); opacity: 0; visibility: hidden; transition: .25s ease; }
.drawer-open .drawer-overlay { opacity: 1; visibility: visible; }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 14px; border-bottom: 1px solid #E6EBF2; }
.drawer-logo img { max-height: 46px; width: auto; }
.drawer-close { width: 40px; height: 40px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface-soft); color: var(--primary); font-size: 26px; line-height: 1; }
.drawer-nav { display: grid; gap: 6px; padding-top: 14px; }
.drawer-nav a { padding: 10px 12px; border-radius: 11px; color: var(--muted); }
.drawer-nav a:hover, .drawer-nav a.active { background: rgba(40,156,255,.10); color: var(--primary); font-weight: 800; }
.mobile-bottom-nav { display: none; }
@media (max-width: 1240px) {
    .site-shell { grid-template-columns: 190px minmax(0,1fr); }
    .quick-links { grid-template-columns: repeat(3, minmax(0,1fr)); }
    .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 1023px) {
    .nav-core { display: none; }
    .mobile-menu-button { display: block; flex: 0 0 auto; }
    .header-inner { width: min(100% - 24px, 900px); min-height: 68px; gap: 12px; }
    .header-inner .logo { position: absolute; left: 50%; transform: translateX(-50%); }
    .logo img { max-height: 44px; }
    .header-register { min-height: 40px; padding: 8px 18px; }
    .site-shell { width: min(100% - 24px, 900px); grid-template-columns: 1fr; padding-top: 88px; padding-bottom: 94px; }
    .side-channel, .floating-service { display: none; }
    .mobile-bottom-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 450; display: grid; grid-template-columns: repeat(4,1fr); padding: 7px max(8px, env(safe-area-inset-right)) calc(7px + env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left)); background: rgba(255,255,255,.96); border-top: 1px solid var(--border); box-shadow: 0 -8px 24px rgba(56,92,138,.12); backdrop-filter: blur(10px); }
    .mobile-bottom-nav a { display: grid; justify-items: center; gap: 1px; color: var(--muted); font-size: 12px; }
    .mobile-bottom-nav a span { color: var(--primary); font-weight: 800; font-size: 15px; }
    .mobile-bottom-nav a.active { color: var(--primary); font-weight: 800; }
    .page-hero { padding: 34px 28px; }
    .grid-3, .product-matrix { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .product-matrix .card:first-child { grid-column: auto; }
    .media-split, .media-split.reverse { grid-template-columns: 1fr; }
    .media-split.reverse .media-copy, .media-split.reverse .media-frame { order: initial; }
    .footer-inner { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 700px) {
    .site-shell { width: min(100% - 20px, 650px); }
    .page-hero { padding: 28px 20px; border-radius: 20px; }
    .page-hero p { font-size: 15px; }
    .section-box { padding: 22px 16px; }
    .section-head { display: block; }
    .section-head p { margin-top: 8px; }
    .grid-2, .grid-3, .grid-4, .grid-5, .product-matrix, .quick-links { grid-template-columns: 1fr; }
    .banner-slider { height: clamp(170px, 52vw, 230px); border-radius: 16px; }
    .slider-arrow { width: 36px; height: 36px; font-size: 22px; }
    .slider-arrow.prev { left: 8px; }
    .slider-arrow.next { right: 8px; }
    .media-frame { min-height: 190px; }
    .content-img, .zone-card img, .app-section img { max-height: 240px; }
    .footer-inner, .compliance-note { width: min(100% - 28px, 650px); }
    .footer-links { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 420px) {
    .header-register { padding: 8px 14px; }
    .footer-links { grid-template-columns: 1fr; }
}