:root {
    --bg: #F4FBFF;
    --white: #FFFFFF;
    --soft: #EAF7FF;
    --soft-2: #F2FAFF;
    --blue: #1CA8F6;
    --bright: #38C7FF;
    --deep: #0877C9;
    --cyan: #7FE4FF;
    --ink: #223044;
    --muted: #5F7082;
    --footer: #082A46;
    --radius: 22px;
    --shadow: 0 16px 40px rgba(8,119,201,.08);
    --shadow-strong: 0 18px 48px rgba(8,119,201,.13);
    --max: 1200px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    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: 16px; top: -50px; z-index: 3000; background: var(--deep); color: #fff; padding: 9px 14px; border-radius: 10px; }
.skip-link:focus { top: 12px; }
.section-wrap { width: min(calc(100% - 32px), var(--max)); margin-inline: auto; }
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1200;
    background: rgba(255,255,255,.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 8px 24px rgba(8,119,201,.08);
}
.topbar { min-height: 78px; display: grid; grid-template-columns: 210px 1fr auto; align-items: center; gap: 28px; }
.brand-logo { width: 176px; display: flex; align-items: center; }
.brand-logo img { width: 100%; height: 54px; object-fit: contain; object-position: left center; }
.core-nav { display: flex; justify-content: center; align-items: center; gap: 8px; min-width: 0; }
.core-nav a { position: relative; padding: 11px 14px; border-radius: 999px; color: #1D2A3A; font-weight: 700; white-space: nowrap; transition: .2s ease; }
.core-nav a:hover, .core-nav a.is-active { color: var(--deep); background: var(--soft); }
.core-nav a.is-active::after { content: ""; position: absolute; left: 50%; bottom: 4px; width: 22px; height: 3px; border-radius: 99px; background: var(--blue); transform: translateX(-50%); }
.main-btn, .float-register {
    display: inline-flex; align-items: center; justify-content: center;
    min-height: 44px; padding: 0 24px; border-radius: 999px;
    background: linear-gradient(135deg, #38C7FF 0%, #1CA8F6 48%, #0877C9 100%);
    color: #fff; font-weight: 800; border: 0; box-shadow: 0 12px 26px rgba(8,119,201,.18); transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover, .float-register:hover { transform: translateY(-2px); box-shadow: 0 16px 30px rgba(8,119,201,.26); }
.nav-register { justify-self: end; min-width: 88px; flex: 0 0 auto; }
.channel-strip { border-top: 1px solid rgba(28,168,246,.08); background: rgba(234,247,255,.88); }
.channel-scroll { display: flex; align-items: center; gap: 9px; overflow-x: auto; padding-block: 11px; scrollbar-width: thin; scrollbar-color: rgba(28,168,246,.45) transparent; }
.channel-scroll a { flex: 0 0 auto; padding: 7px 13px; color: var(--muted); background: rgba(255,255,255,.82); border: 1px solid rgba(28,168,246,.10); border-radius: 999px; font-size: 14px; white-space: nowrap; }
.channel-scroll a:hover, .channel-scroll a.is-active { background: var(--blue); color: #fff; border-color: var(--blue); }
.menu-toggle { display: none; width: 44px; height: 44px; border: 0; background: var(--soft); border-radius: 13px; padding: 11px; }
.menu-toggle span { display: block; height: 2px; background: var(--deep); margin: 5px 0; border-radius: 99px; }
.site-main { padding-top: 142px; min-height: 70vh; }
.banner-slider { max-width: 1200px; margin: 24px auto 34px; border-radius: 22px; background: #fff; box-shadow: 0 16px 40px rgba(8,119,201,.10); overflow: hidden; position: relative; z-index: 1; }
.slider-track { position: relative; min-height: 260px; aspect-ratio: 16 / 6.3; background: #fff; }
.slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .55s ease; }
.slide.is-active { opacity: 1; visibility: visible; }
.banner-slider img { width: 100%; height: 100%; object-fit: contain; background: #fff; }
.slider-arrow { position: absolute; top: 50%; transform: translateY(-50%); width: 48px; height: 48px; border: 1px solid rgba(255,255,255,.55); border-radius: 50%; background: rgba(8,42,70,.38); color: #fff; font-size: 32px; line-height: 1; z-index: 3; }
.slider-arrow:hover { background: rgba(8,119,201,.78); }
.slider-prev { left: 18px; }
.slider-next { right: 18px; }
.slider-dots { position: absolute; left: 50%; bottom: 16px; transform: translateX(-50%); display: flex; gap: 8px; z-index: 3; }
.slider-dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.62); box-shadow: 0 0 0 1px rgba(8,42,70,.18); }
.slider-dot.is-active { width: 28px; border-radius: 99px; background: var(--bright); }
.section-heading { margin-bottom: 22px; }
.section-heading span, .eyebrow, .panel-tag { display: inline-flex; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
h1, h2, h3, .section-title { color: var(--deep); line-height: 1.28; }
h1 { font-size: clamp(32px, 4vw, 54px); margin: 12px 0 18px; }
h2 { font-size: clamp(24px, 2.7vw, 36px); margin: 8px 0 16px; }
h3 { font-size: 21px; margin: 8px 0 10px; }
p { margin: 0 0 14px; }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--blue); font-weight: 800; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }
.text-link:hover { color: var(--deep); }
.brand-intro, .inner-hero { margin-top: 28px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 34px; align-items: center; background: linear-gradient(135deg, #fff 0%, #EDF8FF 100%); border: 1px solid rgba(28,168,246,.12); box-shadow: var(--shadow); border-radius: 28px; padding: clamp(26px, 4vw, 58px); }
.brand-intro-copy p, .inner-hero-copy p { color: var(--muted); font-size: 17px; }
.brand-intro-media, .inner-hero-media { min-width: 0; }
.brand-intro-media img, .inner-hero-media img, .content-img, .zone-card img, .app-section img { width: 100%; height: auto; max-height: 390px; object-fit: contain; border-radius: 20px; background: #fff; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 24px; }
.quick-categories { margin-top: 32px; }
.quick-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.quick-item { background: #fff; border: 1px solid rgba(28,168,246,.12); border-radius: 18px; padding: 20px; box-shadow: 0 10px 28px rgba(8,119,201,.06); }
.quick-item h3 { font-size: 18px; }
.quick-item p { color: var(--muted); font-size: 14px; min-height: 50px; }
.platform-strip { margin-top: 34px; padding: 28px 34px; border-radius: 22px; background: linear-gradient(100deg, #fff 0%, #EAF7FF 58%, #DFF7FF 100%); border: 1px solid rgba(28,168,246,.12); box-shadow: var(--shadow); }
.platform-strip p { margin: 0; font-size: 17px; }
.info-board { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 34px; }
.info-card, .card, .zone-card, .review-card, .content-panel { background: #fff; border: 1px solid rgba(28,168,246,.12); box-shadow: var(--shadow); border-radius: 20px; }
.info-card { padding: 24px; }
.info-number { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; color: #fff; background: linear-gradient(135deg, var(--bright), var(--deep)); border-radius: 13px; font-weight: 900; }
.info-card p { color: var(--muted); font-size: 15px; }
.content-row { margin-top: 44px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.feature-card { display: grid; grid-template-columns: 1fr; gap: 18px; background: #fff; border: 1px solid rgba(28,168,246,.12); border-radius: 24px; box-shadow: var(--shadow); padding: 26px; overflow: hidden; }
.feature-card img { width: 100%; max-height: 265px; object-fit: contain; border-radius: 16px; background: var(--soft-2); }
.service-list { margin: 14px 0 18px; padding: 0; list-style: none; display: grid; gap: 9px; }
.service-list li { position: relative; padding-left: 22px; color: var(--muted); }
.service-list li::before { content: ""; position: absolute; left: 2px; top: .8em; width: 8px; height: 8px; border-radius: 50%; background: var(--bright); box-shadow: 0 0 0 4px rgba(56,199,255,.15); }
.three-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.zone-card { overflow: hidden; }
.zone-card img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; padding: 12px; background: var(--soft-2); border-bottom: 1px solid rgba(28,168,246,.10); }
.zone-card-body { padding: 24px; }
.zone-card-body p { color: var(--muted); }
.wall-grid { display: grid; grid-template-columns: 1.1fr .9fr .9fr; gap: 18px; }
.horizontal-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.app-wide { grid-column: span 1; }
.text-wall { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.text-wall .card { padding: 28px; }
.security-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.security-grid .card { padding: 30px; background: linear-gradient(145deg, #fff, #F2FAFF); }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.review-card { padding: 24px; }
.review-card p { color: var(--ink); }
.review-card strong { color: var(--deep); font-size: 14px; }
.faq-section { margin-top: 46px; }
.faq-list { display: grid; gap: 12px; }
.faq-list details { background: #fff; border: 1px solid rgba(28,168,246,.12); border-radius: 16px; box-shadow: 0 10px 28px rgba(8,119,201,.05); padding: 0 20px; }
.faq-list summary { padding: 18px 34px 18px 0; list-style: none; cursor: pointer; color: var(--deep); font-weight: 800; position: relative; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 0; top: 13px; width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; background: var(--soft); color: var(--blue); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { color: var(--muted); padding: 0 0 18px; }
.about-summary { margin: 46px auto; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 28px; padding: 34px; background: #fff; border-radius: 22px; border: 1px solid rgba(28,168,246,.12); box-shadow: var(--shadow); }
.compliance-panel { margin: 46px auto; padding: 30px 34px; border-left: 5px solid var(--bright); border-radius: 18px; background: linear-gradient(100deg, #fff, #EAF7FF); box-shadow: var(--shadow); }
.compliance-panel h2 { font-size: 24px; }
.compliance-panel p { color: var(--muted); }
.content-section-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 34px; }
.content-panel { padding: clamp(24px, 3vw, 36px); }
.content-panel-wide { grid-column: 1 / -1; }
.content-panel p { color: var(--muted); }
.service-float { position: fixed; right: 20px; top: 50%; transform: translateY(-42%); z-index: 900; width: 108px; padding: 10px; display: grid; gap: 8px; border-radius: 18px; background: rgba(255,255,255,.95); border: 1px solid rgba(28,168,246,.14); box-shadow: var(--shadow-strong); backdrop-filter: blur(10px); }
.service-float a, .service-float button { min-height: 40px; display: grid; place-items: center; border: 0; border-radius: 12px; background: var(--soft-2); color: var(--deep); font-size: 13px; font-weight: 800; }
.service-float .float-register { background: linear-gradient(135deg, var(--bright), var(--blue), var(--deep)); color: #fff; }
.service-float button:hover, .service-float a:not(.float-register):hover { background: var(--blue); color: #fff; }
.site-footer { margin-top: 64px; background: var(--footer); color: #EAF8FF; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, .8fr); gap: 38px; padding-block: 52px 38px; }
.footer-brand img { width: 176px; height: 56px; object-fit: contain; object-position: left; filter: brightness(0) invert(1); margin-bottom: 18px; }
.footer-brand p { max-width: 520px; color: rgba(234,248,255,.76); }
.footer-grid h2 { color: #fff; font-size: 17px; margin: 0 0 14px; }
.footer-grid > div:not(.footer-brand) { display: flex; flex-direction: column; gap: 8px; }
.footer-grid a { color: rgba(234,248,255,.78); }
.footer-grid a:hover { color: var(--cyan); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-block: 20px; border-top: 1px solid rgba(234,248,255,.12); color: rgba(234,248,255,.66); font-size: 13px; }
.footer-bottom p { margin: 0; }
.mobile-drawer { position: fixed; inset: 0 auto 0 0; z-index: 2200; width: min(84vw, 320px); background: #fff; transform: translateX(-102%); transition: transform .24s ease; box-shadow: 18px 0 45px rgba(8,42,70,.18); display: flex; flex-direction: column; }
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 16px 18px; border-bottom: 1px solid rgba(28,168,246,.12); }
.drawer-head img { width: 150px; height: 48px; object-fit: contain; object-position: left; }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 12px; background: var(--soft); color: var(--deep); font-size: 28px; line-height: 1; }
.drawer-nav { overflow-y: auto; padding: 12px 14px 28px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.drawer-nav a { padding: 10px 11px; border-radius: 11px; color: var(--ink); background: var(--soft-2); font-size: 14px; }
.drawer-nav a.is-active { background: var(--blue); color: #fff; }
.drawer-overlay { position: fixed; inset: 0; z-index: 2100; background: rgba(8,42,70,.42); opacity: 0; transition: opacity .22s ease; }
.drawer-overlay.is-visible { opacity: 1; }
.mobile-bottom-nav { display: none; }

@media (max-width: 1320px) {
    .service-float { right: 8px; width: 98px; }
    .section-wrap { width: min(calc(100% - 46px), var(--max)); }
}
@media (max-width: 1100px) {
    .topbar { grid-template-columns: 180px 1fr auto; gap: 16px; }
    .brand-logo { width: 160px; }
    .core-nav a { padding-inline: 10px; font-size: 14px; }
    .service-float { display: none; }
    .info-board { grid-template-columns: repeat(2, 1fr); }
    .three-grid, .horizontal-grid, .review-grid { grid-template-columns: repeat(2, 1fr); }
    .wall-grid { grid-template-columns: repeat(2, 1fr); }
    .wall-grid .zone-card:first-child { grid-column: 1 / -1; }
    .footer-grid { grid-template-columns: 1.3fr repeat(3, 1fr); gap: 24px; }
}
@media (max-width: 820px) {
    .section-wrap { width: min(calc(100% - 28px), var(--max)); }
    .site-header { box-shadow: 0 6px 20px rgba(8,119,201,.10); }
    .topbar { min-height: 70px; grid-template-columns: 48px 1fr auto; gap: 12px; }
    .menu-toggle { display: block; }
    .core-nav, .channel-strip { display: none; }
    .brand-logo { width: 148px; justify-self: center; }
    .brand-logo img { height: 48px; object-position: center; }
    .nav-register { min-width: 74px; min-height: 40px; padding: 0 18px; }
    .site-main { padding-top: 72px; }
    .banner-slider { margin: 14px 14px 26px; border-radius: 17px; }
    .slider-track { min-height: 180px; aspect-ratio: 16 / 8.6; }
    .slider-arrow { width: 42px; height: 42px; font-size: 28px; }
    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }
    .brand-intro, .inner-hero { grid-template-columns: 1fr; padding: 28px; gap: 24px; }
    .inner-hero-media { order: -1; }
    .quick-grid, .feature-grid, .content-section-grid, .security-grid, .text-wall { grid-template-columns: 1fr; }
    .content-panel-wide { grid-column: auto; }
    .three-grid, .horizontal-grid, .review-grid, .wall-grid { grid-template-columns: 1fr 1fr; }
    .wall-grid .zone-card:first-child { grid-column: auto; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-bottom { flex-direction: column; }
    .mobile-bottom-nav { position: fixed; inset: auto 0 0 0; z-index: 1100; display: grid; grid-template-columns: repeat(4, 1fr); min-height: 66px; padding-bottom: env(safe-area-inset-bottom); background: rgba(255,255,255,.96); border-top: 1px solid rgba(28,168,246,.14); box-shadow: 0 -10px 30px rgba(8,119,201,.10); backdrop-filter: blur(12px); }
    .mobile-bottom-nav a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; color: var(--muted); font-size: 12px; }
    .mobile-bottom-nav span { display: grid; place-items: center; min-width: 28px; height: 24px; padding: 0 5px; border-radius: 9px; background: var(--soft); color: var(--deep); font-size: 11px; font-weight: 900; }
    .mobile-bottom-nav a:hover { color: var(--deep); }
    .site-footer { padding-bottom: 68px; }
}
@media (max-width: 560px) {
    body { font-size: 15px; }
    .section-wrap { width: min(calc(100% - 22px), var(--max)); }
    .topbar { width: calc(100% - 20px); }
    .brand-logo { width: 132px; }
    .brand-logo img { height: 44px; }
    .nav-register { min-width: 66px; padding-inline: 15px; font-size: 14px; }
    .banner-slider { margin-inline: 10px; }
    .slider-track { min-height: 150px; aspect-ratio: 16 / 9.6; }
    .slider-arrow { width: 36px; height: 36px; font-size: 24px; }
    .slider-dots { bottom: 9px; }
    .brand-intro, .inner-hero { padding: 23px; border-radius: 21px; }
    h1 { font-size: 32px; }
    h2 { font-size: 25px; }
    .quick-grid, .info-board, .three-grid, .horizontal-grid, .review-grid, .wall-grid, .footer-grid { grid-template-columns: 1fr; }
    .footer-brand { grid-column: auto; }
    .quick-item p { min-height: auto; }
    .platform-strip, .compliance-panel, .about-summary { padding: 24px; }
    .about-summary { grid-template-columns: 1fr; }
    .content-row { margin-top: 36px; }
    .drawer-nav { grid-template-columns: 1fr 1fr; }
}