:root {
    --page: #E6EBF2;
    --surface: #FFFFFF;
    --surface-soft: #F5F7FB;
    --surface-muted: #EEF2F7;
    --line: rgba(40, 156, 255, 0.16);
    --primary: #289CFF;
    --text: #243447;
    --muted: #66788A;
    --footer: #243447;
    --shadow: 0 14px 36px rgba(56, 92, 138, 0.10);
    --gradient: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    padding-top: 86px;
    overflow-x: hidden;
    background: var(--page);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
}
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; background: #fff; padding: 10px 16px; border-radius: 8px; }
.skip-link:focus { top: 12px; }
.content-width { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    background: rgba(245,247,251,0.94);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(56,92,138,0.10);
    border-bottom: 1px solid rgba(255,255,255,0.72);
}
.header-inner {
    width: min(1380px, 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; display: inline-flex; align-items: center; }
.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 { color: #4E5F7A; position: relative; font-weight: 700; padding: 12px 8px; border-radius: 10px; }
.nav-core a:hover { color: var(--primary); background: rgba(40,156,255,.08); }
.nav-core a.active { color: var(--primary); }
.nav-core a.active::after { content: ""; position: absolute; left: 50%; bottom: 2px; width: 28px; height: 3px; border-radius: 999px; background: var(--primary); transform: translateX(-50%); }
.main-btn { display: inline-flex; justify-content: center; align-items: center; min-height: 44px; padding: 0 24px; border: 0; border-radius: 999px; background: var(--gradient); color: #fff; font-weight: 800; box-shadow: 0 10px 20px rgba(36,155,255,.22); }
.main-btn:hover { transform: translateY(-1px); box-shadow: 0 14px 26px rgba(36,155,255,.28); }
.header-register { flex: 0 0 auto; }
.mobile-menu-button { display: none; width: 42px; height: 42px; padding: 9px; border: 0; background: transparent; border-radius: 10px; }
.mobile-menu-button span { display: block; height: 2px; margin: 5px 0; background: var(--text); border-radius: 2px; }
.page-shell { width: min(1420px, calc(100% - 36px)); margin: 0 auto; display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 24px; align-items: start; }
.site-main { min-width: 0; padding-bottom: 56px; }
.side-channel { position: sticky; top: 100px; margin-top: 28px; max-height: calc(100vh - 124px); overflow: auto; padding: 16px; background: rgba(255,255,255,0.92); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); }
.side-channel strong { display: block; color: var(--text); padding: 4px 10px 10px; }
.side-channel nav { display: grid; gap: 4px; }
.side-channel a { color: var(--muted); border-radius: 12px; padding: 8px 10px; font-size: 14px; }
.side-channel a:hover, .side-channel a.active { color: var(--primary); background: rgba(40,156,255,0.10); font-weight: 700; }
.floating-service { position: fixed; right: 18px; top: 42%; z-index: 60; display: grid; gap: 8px; width: 64px; }
.floating-service a, .floating-service button { min-height: 48px; padding: 8px 5px; border-radius: 14px; border: 1px solid var(--line); background: #fff; color: var(--primary); text-align: center; box-shadow: 0 14px 30px rgba(56,92,138,0.12); font-size: 14px; font-weight: 700; }
.floating-service a.register-link { background: var(--gradient); color: #fff; }
.banner-slider { width: 100%; height: clamp(300px, 31vw, 390px); margin: 28px auto 36px; border-radius: 22px; background: #fff; box-shadow: 0 18px 40px rgba(56,92,138,0.12); 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%; transform: translateY(-50%); z-index: 3; width: 44px; height: 44px; border: none; border-radius: 999px; background: rgba(255,255,255,0.88); color: var(--primary); box-shadow: 0 8px 20px rgba(56,92,138,0.16); font-size: 30px; line-height: 1; }
.slider-arrow.prev { left: 16px; }
.slider-arrow.next { right: 16px; }
.slider-dots { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); display: flex; gap: 8px; z-index: 3; }
.slider-dots button { width: 9px; height: 9px; padding: 0; border-radius: 50%; border: none; background: rgba(40,156,255,0.24); }
.slider-dots button.active { background: var(--primary); transform: scale(1.2); }
.page-hero, .section-block, .card, .zone-card, .info-card, .review-card, .faq-item { background: rgba(255,255,255,0.92); border: 1px solid var(--line); box-shadow: var(--shadow); }
.page-hero { margin: 28px 0 28px; padding: clamp(28px, 5vw, 58px); border-radius: 24px; position: relative; overflow: hidden; }
.page-hero::after { content: ""; position: absolute; right: -90px; top: -120px; width: 280px; height: 280px; border-radius: 50%; background: radial-gradient(circle, rgba(50,209,246,.20), rgba(40,156,255,0)); pointer-events: none; }
.page-hero .eyebrow { color: var(--primary); font-weight: 800; letter-spacing: .08em; }
.page-hero h1 { max-width: 820px; margin: 8px 0 14px; color: var(--primary); font-size: clamp(30px, 5vw, 52px); line-height: 1.25; }
.page-hero p { max-width: 840px; margin: 0 0 22px; color: var(--muted); font-size: 17px; }
.section-block { margin: 24px 0; padding: clamp(22px, 3vw, 34px); border-radius: 22px; }
.section-title { margin: 0 0 10px; color: var(--primary); font-size: clamp(24px, 3vw, 34px); line-height: 1.35; }
.section-lead { margin: 0 0 22px; color: var(--muted); }
.grid-2, .grid-3, .grid-4, .quick-grid, .product-grid, .review-grid, .footer-grid { 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)); }
.quick-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.review-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card, .zone-card, .info-card, .review-card { padding: 22px; border-radius: 18px; }
.card h2, .card h3, .zone-card h2, .zone-card h3, .info-card h2, .info-card h3, .review-card h3 { margin: 0 0 10px; color: var(--primary); line-height: 1.4; }
.card p, .zone-card p, .info-card p, .review-card p { margin: 0; color: var(--muted); }
.text-link { display: inline-flex; margin-top: 14px; color: var(--primary); font-weight: 800; }
.text-link::after { content: "→"; margin-left: 6px; }
.media-card { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(260px, .88fr); gap: 28px; align-items: center; }
.media-card.reverse { grid-template-columns: minmax(260px, .88fr) minmax(0, 1.12fr); }
.media-card.reverse .media-copy { order: 2; }
.content-img, .zone-card img, .app-section img { width: 100%; max-height: 300px; object-fit: contain; border-radius: 16px; background: var(--surface-soft); }
.image-frame { padding: 14px; border-radius: 18px; background: linear-gradient(145deg, #fff, #eef6ff); border: 1px solid var(--line); }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 0; padding: 0; list-style: none; }
.tag-list li { padding: 7px 12px; border-radius: 999px; background: rgba(40,156,255,.10); color: #2779b9; font-size: 14px; }
.notice-box { padding: 18px 20px; border-left: 4px solid var(--primary); border-radius: 12px; background: #f7fbff; color: var(--muted); }
.review-card { position: relative; }
.review-card::before { content: "“"; position: absolute; right: 18px; top: 6px; color: rgba(40,156,255,.16); font-size: 58px; line-height: 1; }
.review-card strong { display: block; margin-top: 14px; color: var(--text); }
.faq-list { display: grid; gap: 12px; }
.faq-item { border-radius: 16px; overflow: hidden; box-shadow: 0 8px 22px rgba(56,92,138,.07); }
.faq-question { width: 100%; display: flex; justify-content: space-between; gap: 16px; text-align: left; padding: 18px 20px; border: 0; background: #fff; color: var(--text); font-weight: 800; }
.faq-question::after { content: "+"; color: var(--primary); font-size: 22px; }
.faq-item.open .faq-question::after { content: "−"; }
.faq-answer { padding: 0 20px 18px; color: var(--muted); }
.compliance-strip { padding: 38px 0; background: #dce7f3; border-top: 1px solid rgba(40,156,255,.13); }
.compliance-strip h2 { margin: 0 0 8px; color: var(--primary); }
.compliance-strip p { margin: 0; color: #53677a; }
.site-footer { background: var(--footer); color: #EAF3FF; padding: 48px 0 18px; }
.footer-grid { grid-template-columns: 1.5fr repeat(3, 1fr); }
.site-footer h2 { margin: 0 0 12px; color: #fff; font-size: 17px; }
.site-footer a, .site-footer p { display: block; margin: 8px 0; color: #cbd9e8; }
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand .logo img { max-height: 50px; }
.footer-bottom { margin-top: 30px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.12); color: #9fb2c5; font-size: 14px; }
.drawer-overlay { position: fixed; inset: 0; z-index: 9998; background: rgba(17,35,55,.42); opacity: 0; transition: opacity .22s ease; }
.drawer-overlay.show { opacity: 1; }
.mobile-drawer { position: fixed; inset: 0 auto 0 0; z-index: 10000; width: min(84vw, 320px); transform: translateX(-105%); transition: transform .26s ease; background: #fff; box-shadow: 18px 0 44px rgba(26,57,91,.20); overflow-y: auto; }
.mobile-drawer.open { transform: translateX(0); }
.drawer-head { position: sticky; top: 0; z-index: 2; display: flex; justify-content: space-between; align-items: center; padding: 16px 18px; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 12px; background: var(--surface-muted); color: var(--text); font-size: 28px; }
.drawer-nav { display: grid; padding: 14px; gap: 5px; }
.drawer-nav a { padding: 11px 14px; border-radius: 12px; color: var(--muted); font-weight: 600; }
.drawer-nav a.active, .drawer-nav a:hover { color: var(--primary); background: rgba(40,156,255,.10); }
.mobile-bottom-nav { display: none; }
body.drawer-open { overflow: hidden; }
@media (max-width: 1180px) {
    .page-shell { grid-template-columns: 170px minmax(0, 1fr); }
    .quick-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .floating-service { right: 8px; }
}
@media (max-width: 980px) {
    body { padding-top: 72px; }
    .header-inner { min-height: 64px; width: calc(100% - 24px); gap: 10px; }
    .nav-core, .side-channel, .floating-service { display: none; }
    .mobile-menu-button { display: block; flex: 0 0 42px; }
    .header-inner .logo { position: absolute; left: 50%; transform: translateX(-50%); }
    .header-inner .logo img { max-height: 42px; max-width: 132px; }
    .header-register { min-height: 40px; padding: 0 18px; margin-left: auto; }
    .page-shell { display: block; width: min(100% - 24px, 900px); }
    .banner-slider { margin-top: 18px; height: clamp(230px, 39vw, 320px); border-radius: 18px; }
    .product-grid, .grid-3, .review-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 680px) {
    body { padding-bottom: calc(74px + env(safe-area-inset-bottom)); }
    .content-width { width: calc(100% - 24px); }
    .page-hero { margin-top: 18px; padding: 25px 20px; border-radius: 18px; }
    .page-hero h1 { font-size: 32px; }
    .page-hero p { font-size: 15px; }
    .section-block { padding: 20px 16px; border-radius: 18px; }
    .banner-slider { height: clamp(170px, 55vw, 230px); margin-bottom: 22px; }
    .slider-arrow { width: 38px; height: 38px; font-size: 26px; }
    .slider-arrow.prev { left: 8px; }
    .slider-arrow.next { right: 8px; }
    .quick-grid, .grid-2, .grid-3, .grid-4, .product-grid, .review-grid, .footer-grid { grid-template-columns: 1fr; }
    .quick-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .media-card, .media-card.reverse { grid-template-columns: 1fr; }
    .media-card.reverse .media-copy { order: initial; }
    .content-img, .zone-card img, .app-section img { max-height: 230px; }
    .mobile-bottom-nav { position: fixed; inset: auto 0 0 0; z-index: 900; display: grid; grid-template-columns: repeat(4, 1fr); padding: 7px 8px calc(7px + env(safe-area-inset-bottom)); background: rgba(255,255,255,.96); backdrop-filter: blur(12px); border-top: 1px solid var(--line); box-shadow: 0 -8px 24px rgba(56,92,138,.10); }
    .mobile-bottom-nav a { padding: 8px 4px; text-align: center; color: var(--muted); font-size: 13px; font-weight: 700; border-radius: 10px; }
    .mobile-bottom-nav a.active { color: var(--primary); background: rgba(40,156,255,.09); }
    .site-footer { padding-bottom: 28px; }
}
@media (max-width: 390px) {
    .quick-grid { grid-template-columns: 1fr; }
    .header-register { padding: 0 15px; }
}