:root {
    --bg: #E6EBF2;
    --nav-bg: #F5F7FB;
    --white: #FFFFFF;
    --soft: #EEF2F7;
    --soft-2: #DDE4EE;
    --primary: #289CFF;
    --nav-text: #4E5F7A;
    --text: #243447;
    --muted: #66788A;
    --hint: #8A9AAF;
    --footer: #243447;
    --footer-text: #EAF3FF;
    --border: rgba(40, 156, 255, 0.16);
    --shadow: 0 14px 36px rgba(56, 92, 138, 0.12);
    --radius-xl: 24px;
    --radius-lg: 18px;
    --radius-md: 14px;
    --header-height: 76px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
    line-height: 1.75;
    padding-top: var(--header-height);
    overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
button, input, textarea { font: inherit; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 20000; padding: 10px 16px; background: var(--primary); color: #fff; border-radius: 8px; }
.skip-link:focus { top: 12px; }

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 12000;
    height: var(--header-height);
    background: rgba(245, 247, 251, 0.96);
    border-bottom: 1px solid rgba(78, 95, 122, 0.10);
    box-shadow: 0 8px 24px rgba(56, 92, 138, 0.08);
    backdrop-filter: blur(14px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: var(--header-height); }
.logo { flex: 0 0 auto; display: inline-flex; align-items: center; }
.logo img { max-height: 50px; width: auto; display: block; }
.nav-wrap { flex: 1 1 auto; min-width: 0; display: flex; justify-content: center; }
.nav { display: flex; align-items: center; gap: clamp(12px, 1.65vw, 22px); white-space: nowrap; flex-wrap: nowrap; }
.nav > a, .nav-trigger { position: relative; display: inline-flex; align-items: center; gap: 5px; min-height: 44px; color: var(--nav-text); font-weight: 700; font-size: 15px; border: 0; background: transparent; cursor: pointer; padding: 0; }
.nav > a::after, .dropdown::after, .more-dropdown::after { content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 2px; border-radius: 9px; background: var(--primary); transform: scaleX(0); transition: transform .22s ease; }
.nav > a:hover, .nav > a.active, .nav-trigger:hover, .dropdown.active .nav-trigger, .more-dropdown.active .nav-trigger { color: var(--primary); }
.nav > a:hover::after, .nav > a.active::after, .dropdown:hover::after, .dropdown.active::after, .more-dropdown:hover::after, .more-dropdown.active::after { transform: scaleX(1); }
.header-action { flex: 0 0 auto; display: flex; align-items: center; }
.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: #FFFFFF; font-weight: 800; border: 1px solid rgba(255,255,255,.42); box-shadow: 0 10px 24px rgba(36,155,255,.25); transition: transform .2s ease, box-shadow .2s ease; }
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(36,155,255,.32); }
.header-register { min-width: 86px; }
.dropdown, .more-dropdown { position: relative; }
.dropdown-menu, .more-menu { position: absolute; top: calc(100% + 8px); left: 50%; min-width: 186px; padding: 8px; background: #FFFFFF; border: 1px solid rgba(40,156,255,0.12); border-radius: 14px; box-shadow: 0 18px 38px rgba(56,92,138,0.16); z-index: 13000; opacity: 0; visibility: hidden; transform: translate(-50%, 8px); transition: opacity .18s ease, transform .18s ease, visibility .18s ease; }
.dropdown-menu a, .more-menu a { display: block; padding: 10px 14px; color: var(--nav-text); white-space: nowrap; border-radius: 9px; font-size: 14px; font-weight: 650; }
.dropdown-menu a:hover, .more-menu a:hover { color: var(--primary); background: rgba(40,156,255,0.08); }
.dropdown:hover .dropdown-menu, .more-dropdown:hover .more-menu, .dropdown:focus-within .dropdown-menu, .more-dropdown:focus-within .more-menu, .dropdown.menu-visible .dropdown-menu, .more-dropdown.menu-visible .more-menu { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.mobile-menu-btn { display: none; width: 42px; height: 42px; padding: 10px; border: 0; border-radius: 12px; background: rgba(40,156,255,.08); cursor: pointer; }
.mobile-menu-btn span { display: block; height: 2px; margin: 5px 0; background: var(--nav-text); border-radius: 2px; }
.drawer-overlay { position: fixed; inset: 0; z-index: 13900; background: rgba(25,43,65,.38); opacity: 0; transition: opacity .24s ease; }
.drawer-overlay.is-visible { opacity: 1; }
.mobile-drawer { position: fixed; z-index: 14000; inset: 0 auto 0 0; width: min(84vw, 320px); background: var(--nav-bg); box-shadow: 20px 0 40px rgba(36,52,71,.18); transform: translateX(-105%); transition: transform .28s ease; overflow-y: auto; }
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid rgba(78,95,122,.12); }
.drawer-logo img { max-height: 46px; width: auto; display: block; }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 12px; background: var(--soft); color: var(--nav-text); font-size: 30px; line-height: 1; cursor: pointer; }
.drawer-nav { display: grid; padding: 12px 14px 28px; }
.drawer-nav a { padding: 11px 13px; color: var(--nav-text); font-weight: 700; border-radius: 10px; }
.drawer-nav a:hover { color: var(--primary); background: rgba(40,156,255,.08); }

.section-space { padding: 72px 0; }
.section-soft { background: rgba(245,247,251,.62); }
.eyebrow, .card-tag { display: inline-flex; align-items: center; color: var(--primary); font-weight: 800; letter-spacing: .08em; font-size: 13px; text-transform: uppercase; }
h1, h2, h3, .section-title { color: var(--primary); line-height: 1.24; margin-top: 0; }
h1 { font-size: clamp(34px, 5vw, 64px); margin-bottom: 20px; letter-spacing: -.04em; }
h2 { font-size: clamp(27px, 3vw, 40px); margin-bottom: 14px; }
h3 { font-size: 21px; margin-bottom: 10px; }
p { margin: 0 0 16px; color: var(--muted); }
.lead { font-size: clamp(17px, 2vw, 20px); color: var(--text); max-width: 760px; }
.text-btn, .inline-link { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-weight: 800; }
.text-btn::after, .inline-link::after { content: "→"; transition: transform .2s ease; }
.text-btn:hover::after, .inline-link:hover::after { transform: translateX(4px); }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 28px; }

.banner-slider { max-width: 1200px; margin: 28px auto 36px; border-radius: 22px; background: #FFFFFF; box-shadow: 0 18px 40px rgba(56,92,138,0.12); overflow: hidden; position: relative; z-index: 1; }
.slider-track { position: relative; aspect-ratio: 16 / 6.7; background: #FFFFFF; }
.slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .55s ease, visibility .55s ease; }
.slide.is-active { opacity: 1; visibility: visible; }
.banner-slider img { width: 100%; height: 100%; object-fit: contain; background: #FFFFFF; display: block; }
.slide-overlay { position: absolute; inset: auto 0 0; padding: clamp(22px, 4vw, 46px); background: linear-gradient(180deg, transparent 0%, rgba(18,45,72,.76) 100%); color: #fff; pointer-events: none; }
.slide-overlay h2 { color: #fff; font-size: clamp(26px, 4vw, 46px); margin: 0 0 8px; }
.slide-overlay p { color: rgba(255,255,255,.9); max-width: 650px; margin: 0; }
.slider-arrow { position: absolute; top: 50%; transform: translateY(-50%); z-index: 3; width: 44px; height: 44px; border-radius: 50%; border: 1px solid rgba(255,255,255,.7); background: rgba(36,52,71,.38); color: #fff; font-size: 26px; cursor: pointer; backdrop-filter: blur(8px); }
.slider-arrow:hover { background: rgba(40,156,255,.85); }
.slider-prev { left: 18px; }
.slider-next { right: 18px; }
.slider-dots { position: absolute; z-index: 3; left: 50%; bottom: 16px; transform: translateX(-50%); display: flex; gap: 9px; }
.slider-dot { width: 10px; height: 10px; border: 0; border-radius: 50%; background: rgba(255,255,255,.58); cursor: pointer; padding: 0; }
.slider-dot.is-active { width: 28px; border-radius: 8px; background: #fff; }

.welcome-grid, .hero-grid, .split-grid, .app-grid, .support-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr); gap: clamp(30px, 5vw, 72px); align-items: center; }
.hero-grid.no-image { grid-template-columns: 1fr; }
.hero-media, .media-card { background: rgba(255,255,255,.92); border: 1px solid var(--border); border-radius: var(--radius-xl); box-shadow: var(--shadow); padding: clamp(14px, 2vw, 24px); }
.hero-media img, .media-card img, .content-img, .zone-card img, .app-section img { max-width: 100%; width: 100%; height: auto; max-height: 460px; object-fit: contain; display: block; border-radius: 16px; }
.inner-hero { padding-top: 84px; background: radial-gradient(circle at 82% 15%, rgba(40,156,255,.17), transparent 34%), linear-gradient(180deg, rgba(245,247,251,.82), rgba(230,235,242,.5)); }

.section-heading { display: flex; align-items: flex-start; gap: 18px; margin-bottom: 30px; max-width: 860px; }
.section-heading.centered { display: block; text-align: center; margin-inline: auto; }
.section-index { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto; width: 46px; height: 46px; border-radius: 14px; background: rgba(40,156,255,.10); color: var(--primary); font-weight: 900; }
.section-heading p { margin: 0; }
.prose-grid { columns: 2 340px; column-gap: 46px; }
.prose-grid p { break-inside: avoid; color: var(--text); }
.feature-grid, .quick-grid, .product-grid, .review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.quick-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.product-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.card, .zone-card, .info-card, .review-card, .quick-card { background: rgba(255,255,255,0.92); border: 1px solid var(--border); box-shadow: 0 14px 36px rgba(56,92,138,0.10); border-radius: var(--radius-lg); }
.info-card, .quick-card { padding: 25px; }
.info-card p, .quick-card p { margin-bottom: 12px; }
.quick-card { display: flex; flex-direction: column; min-height: 225px; }
.quick-card .inline-link { margin-top: auto; }
.zone-card { overflow: hidden; display: flex; flex-direction: column; }
.zone-card .zone-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.zone-card .zone-body .inline-link { margin-top: auto; }
.zone-card img { border-radius: 0; aspect-ratio: 16/9; background: #fff; }
.review-card { margin: 0; padding: 26px; }
.review-card p { color: var(--text); font-size: 16px; }
.review-card footer { color: var(--hint); font-weight: 700; }
.steps-list { counter-reset: step; list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin: 28px 0 0; padding: 0; }
.steps-list li { position: relative; padding: 26px 22px 22px; background: rgba(255,255,255,.9); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: 0 12px 30px rgba(56,92,138,.08); }
.steps-list li::before { counter-increment: step; content: counter(step, decimal-leading-zero); display: block; margin-bottom: 12px; color: var(--primary); font-weight: 900; font-size: 24px; }
.steps-list li > span { display: block; color: var(--text); font-weight: 900; margin-bottom: 7px; }
.steps-list li p { margin: 0; }

.notice-panel { padding: 28px; border-radius: var(--radius-xl); background: linear-gradient(135deg, rgba(40,156,255,.12), rgba(255,255,255,.88)); border: 1px solid var(--border); box-shadow: var(--shadow); }
.notice-list { display: grid; gap: 12px; margin: 18px 0 0; padding: 0; list-style: none; }
.notice-list li { position: relative; padding-left: 22px; color: var(--text); }
.notice-list li::before { content: ""; position: absolute; left: 0; top: .75em; width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }
.faq-layout { display: grid; grid-template-columns: minmax(260px,.72fr) minmax(0,1.28fr); gap: 48px; align-items: start; }
.faq-intro { position: sticky; top: calc(var(--header-height) + 28px); }
.faq-list { display: grid; gap: 14px; }
details { background: rgba(255,255,255,.94); border: 1px solid var(--border); border-radius: var(--radius-md); box-shadow: 0 10px 26px rgba(56,92,138,.07); padding: 0 20px; }
summary { cursor: pointer; list-style: none; padding: 18px 34px 18px 0; color: var(--text); font-weight: 850; position: relative; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 0; top: 50%; transform: translateY(-50%); color: var(--primary); font-size: 24px; }
details[open] summary::after { content: "−"; }
details p { padding-bottom: 18px; margin: 0; }
.final-cta-wrap { padding-top: 20px; }
.final-cta { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: clamp(28px, 5vw, 54px); border-radius: var(--radius-xl); background: linear-gradient(135deg, #FFFFFF 0%, #EEF8FF 60%, #DDEEFF 100%); border: 1px solid var(--border); box-shadow: var(--shadow); }
.final-cta h2 { max-width: 760px; }
.final-cta p { max-width: 800px; margin-bottom: 0; }

.home-intro { padding: 22px 0 0; }
.stat-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 28px; }
.stat-item { padding: 18px; border-radius: 16px; background: rgba(255,255,255,.78); border: 1px solid var(--border); }
.stat-item strong { display: block; color: var(--primary); font-size: 23px; }
.stat-item span { color: var(--muted); font-size: 14px; }

.site-footer { margin-top: 72px; background: var(--footer); color: var(--footer-text); }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, .7fr); gap: 36px; padding: 58px 0 36px; }
.footer-logo img { max-height: 52px; width: auto; display: block; margin-bottom: 18px; }
.footer-brand p { color: rgba(234,243,255,.76); max-width: 440px; }
.footer-col { display: grid; align-content: start; gap: 8px; }
.footer-col h2 { color: #fff; font-size: 17px; margin-bottom: 8px; }
.footer-col a { color: rgba(234,243,255,.76); }
.footer-col a:hover { color: #fff; }
.footer-notice { padding: 22px 0; border-top: 1px solid rgba(234,243,255,.12); }
.footer-notice p { color: rgba(234,243,255,.72); margin: 0; font-size: 14px; }
.footer-bottom { border-top: 1px solid rgba(234,243,255,.10); padding: 17px 0; color: rgba(234,243,255,.58); font-size: 13px; }

.contact-box { display: grid; gap: 14px; }
.contact-row { display: flex; justify-content: space-between; gap: 22px; padding: 18px 20px; border-radius: 14px; background: rgba(255,255,255,.92); border: 1px solid var(--border); }
.contact-row strong { color: var(--text); }
.contact-row span { color: var(--muted); text-align: right; }

@media (max-width: 1060px) {
    .nav { gap: 12px; }
    .nav > a, .nav-trigger { font-size: 14px; }
    .product-grid { grid-template-columns: repeat(3, 1fr); }
    .quick-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
    :root { --header-height: 68px; }
    .container { width: min(100% - 28px, 1180px); }
    .site-header { height: var(--header-height); }
    .header-inner { min-height: var(--header-height); display: grid; grid-template-columns: 1fr auto 1fr; gap: 10px; }
    .mobile-menu-btn { display: block; justify-self: start; }
    .logo { justify-self: center; }
    .logo img { max-height: 44px; }
    .nav-wrap { display: none; }
    .header-action { justify-self: end; }
    .header-register { min-width: 74px; padding-inline: 17px; min-height: 40px; }
    .section-space { padding: 56px 0; }
    .welcome-grid, .hero-grid, .split-grid, .app-grid, .support-grid { grid-template-columns: 1fr; }
    .hero-media { order: -1; }
    .feature-grid, .review-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-list { grid-template-columns: 1fr; }
    .faq-layout { grid-template-columns: 1fr; }
    .faq-intro { position: static; }
    .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .slider-track { aspect-ratio: 16 / 8.2; }
}

@media (max-width: 640px) {
    body { line-height: 1.65; }
    .container { width: min(100% - 22px, 1180px); }
    h1 { font-size: 34px; }
    h2 { font-size: 27px; }
    .section-space { padding: 44px 0; }
    .banner-slider { margin: 16px 11px 26px; border-radius: 16px; }
    .slider-track { aspect-ratio: 16 / 10; }
    .slide-overlay { padding: 18px 18px 48px; }
    .slide-overlay h2 { font-size: 24px; }
    .slide-overlay p { display: none; }
    .slider-arrow { width: 38px; height: 38px; }
    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }
    .slider-dots { bottom: 12px; }
    .quick-grid, .feature-grid, .product-grid, .review-grid, .stat-strip { grid-template-columns: 1fr; }
    .quick-card { min-height: 0; }
    .prose-grid { columns: 1; }
    .section-heading { gap: 12px; }
    .section-index { width: 40px; height: 40px; border-radius: 12px; }
    .final-cta { align-items: flex-start; flex-direction: column; }
    .final-cta .main-btn { width: 100%; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px 18px; }
    .footer-brand { grid-column: 1 / -1; }
    .contact-row { flex-direction: column; gap: 6px; }
    .contact-row span { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}