:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #EAF7FF;
    --surface-lighter: #F2FAFF;
    --primary: #1CA8F6;
    --primary-bright: #38C7FF;
    --primary-dark: #0877C9;
    --cyan: #7FE4FF;
    --ink: #223044;
    --muted: #5F7082;
    --deep: #1D2A3A;
    --footer: #082A46;
    --line: rgba(28, 168, 246, .14);
    --shadow: 0 16px 40px rgba(8, 119, 201, .08);
    --radius: 22px;
    --header-h: 76px;
    --channel-h: 54px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", 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 { font: inherit; }
.site-main { padding-top: calc(var(--header-h) + var(--channel-h)); }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 42px 0; }
.section-tight { padding: 24px 0; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 22px; }
.section-kicker { color: var(--primary); font-size: 14px; font-weight: 700; letter-spacing: .08em; }
h1, h2, h3, .section-title { color: var(--primary-dark); line-height: 1.28; margin-top: 0; }
h1 { font-size: clamp(30px, 4.2vw, 52px); margin-bottom: 18px; }
h2 { font-size: clamp(24px, 3vw, 36px); margin-bottom: 14px; }
h3 { font-size: 20px; margin-bottom: 10px; }
p { margin: 0 0 16px; }
.muted { color: var(--muted); }
.text-link { color: var(--primary); font-weight: 700; display: inline-flex; align-items: center; gap: 6px; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(3px); }
.main-btn {
    display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 24px;
    background: linear-gradient(135deg, #38C7FF 0%, #1CA8F6 48%, #0877C9 100%);
    color: #fff; border-radius: 999px; box-shadow: 0 12px 26px rgba(8,119,201,.18); font-weight: 800;
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 30px rgba(8,119,201,.24); }
.site-header {
    position: fixed; inset: 0 0 auto; z-index: 1000;
    background: rgba(255,255,255,.94); backdrop-filter: blur(12px);
    box-shadow: 0 8px 24px rgba(8,119,201,.08);
}
.header-inner { width: min(1180px, calc(100% - 40px)); height: var(--header-h); margin: 0 auto; display: grid; grid-template-columns: 210px 1fr auto; align-items: center; gap: 28px; }
.brand-logo { display: inline-flex; align-items: center; }
.brand-logo img { width: 150px; max-height: 48px; object-fit: contain; }
.main-nav { display: flex; align-items: center; justify-content: center; gap: 8px; min-width: 0; }
.main-nav a { position: relative; padding: 11px 16px; border-radius: 12px; color: var(--deep); white-space: nowrap; font-weight: 700; }
.main-nav a:hover { color: var(--primary-dark); background: var(--surface-soft); }
.main-nav a.active { color: var(--primary-dark); }
.main-nav a.active::after { content: ""; position: absolute; left: 18px; right: 18px; bottom: 5px; height: 3px; background: var(--primary); border-radius: 99px; }
.header-register { flex: 0 0 auto; }
.channel-bar { height: var(--channel-h); border-top: 1px solid var(--line); background: rgba(234,247,255,.88); }
.channel-scroll { width: min(1180px, calc(100% - 40px)); height: 100%; margin: 0 auto; display: flex; align-items: center; gap: 10px; overflow-x: auto; scrollbar-width: thin; overscroll-behavior-inline: contain; }
.channel-scroll a { flex: 0 0 auto; padding: 7px 14px; border-radius: 999px; color: var(--muted); background: rgba(255,255,255,.72); border: 1px solid rgba(28,168,246,.12); font-size: 14px; line-height: 1.2; }
.channel-scroll a:hover, .channel-scroll a.active { color: #fff; background: var(--primary); border-color: var(--primary); }
.mobile-header, .mobile-drawer, .mobile-bottom-nav { display: none; }
.service-float { position: fixed; right: 18px; top: 50%; transform: translateY(-50%); z-index: 900; width: 112px; padding: 12px; border-radius: 18px; background: rgba(255,255,255,.96); box-shadow: 0 16px 36px rgba(8,119,201,.14); border: 1px solid var(--line); display: grid; gap: 7px; }
.service-float a, .service-float button { text-align: center; padding: 9px 6px; border: 0; background: transparent; color: var(--primary-dark); border-radius: 10px; cursor: pointer; font-weight: 700; }
.service-float a:hover, .service-float button:hover { background: var(--surface-soft); }
.service-float .float-register { color: #fff; background: linear-gradient(135deg, #38C7FF, #1CA8F6 48%, #0877C9); }
.banner-slider { width: min(1200px, calc(100% - 40px)); 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; }
.slides { position: relative; aspect-ratio: 16/6.2; min-height: 240px; }
.slide { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .45s ease; display: grid; place-items: center; }
.slide.active { opacity: 1; pointer-events: auto; }
.slide img { width: 100%; height: 100%; object-fit: contain; background: #fff; }
.slider-arrow { position: absolute; top: 50%; transform: translateY(-50%); z-index: 4; width: 44px; height: 44px; border: 0; border-radius: 50%; background: rgba(255,255,255,.9); color: var(--primary-dark); box-shadow: 0 8px 24px rgba(8,119,201,.15); cursor: pointer; font-size: 26px; }
.slider-arrow.prev { left: 18px; } .slider-arrow.next { right: 18px; }
.slider-dots { position: absolute; left: 50%; bottom: 16px; transform: translateX(-50%); z-index: 4; display: flex; gap: 8px; }
.slider-dot { width: 10px; height: 10px; border: 0; border-radius: 50%; padding: 0; background: rgba(8,119,201,.3); cursor: pointer; }
.slider-dot.active { width: 28px; border-radius: 99px; background: var(--primary); }
.card, .zone-card, .info-card, .review-card, .content-panel, .hero-card, .faq-item {
    background: #fff; border: 1px solid rgba(28,168,246,.12); box-shadow: var(--shadow); border-radius: var(--radius);
}
.hero-card { width: min(1180px, calc(100% - 40px)); margin: 28px auto 0; padding: clamp(26px, 4vw, 56px); display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 34px; overflow: hidden; background: linear-gradient(135deg, #fff 0%, #f1fbff 56%, #e6f7ff 100%); }
.hero-card.single { grid-template-columns: 1fr; }
.hero-card .hero-copy { max-width: 720px; }
.hero-card .hero-media img, .content-img, .zone-card img, .app-section img { width: 100%; height: auto; object-fit: contain; border-radius: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 22px; }
.quick-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
.quick-card { padding: 18px; border-radius: 18px; background: #fff; border: 1px solid var(--line); }
.quick-card h3 { font-size: 17px; }
.quick-card p { color: var(--muted); font-size: 14px; min-height: 50px; }
.intro-strip { padding: 24px 28px; border-radius: 20px; background: linear-gradient(100deg, #fff, #eaf7ff); border: 1px solid var(--line); box-shadow: 0 12px 30px rgba(8,119,201,.06); }
.info-board { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; }
.info-card { padding: 22px; }
.info-number { color: var(--primary); font-weight: 900; font-size: 28px; }
.dual-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
.triple-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.content-panel, .zone-card { padding: 24px; }
.content-panel.media { display: grid; grid-template-columns: .9fr 1.1fr; gap: 24px; align-items: center; }
.zone-card img { aspect-ratio: 16/9; background: var(--surface-lighter); margin-bottom: 18px; }
.feature-list { margin: 14px 0 18px; padding: 0; list-style: none; display: grid; gap: 9px; }
.feature-list li { position: relative; padding-left: 20px; color: var(--muted); }
.feature-list li::before { content: ""; position: absolute; left: 0; top: .72em; width: 8px; height: 8px; border-radius: 50%; background: var(--primary-bright); box-shadow: 0 0 0 4px rgba(56,199,255,.15); }
.pill-nav { display: flex; flex-wrap: wrap; gap: 10px; }
.pill-nav a { padding: 9px 15px; border-radius: 999px; background: #fff; color: var(--primary-dark); border: 1px solid var(--line); font-weight: 700; }
.pill-nav a:hover { color: #fff; background: var(--primary); }
.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.review-card { padding: 22px; }
.review-card strong { display: block; color: var(--primary-dark); margin-bottom: 8px; }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 20px 22px; }
.faq-item summary { cursor: pointer; color: var(--primary-dark); font-weight: 800; }
.faq-item p { margin: 12px 0 0; color: var(--muted); }
.notice-box { padding: 22px 24px; border-radius: 18px; background: #edf8ff; border-left: 4px solid var(--primary); color: var(--muted); }
.page-hero { width: min(1180px, calc(100% - 40px)); margin: 28px auto 0; padding: clamp(30px, 5vw, 62px); border-radius: 24px; background: linear-gradient(135deg, #fff, #e9f8ff); box-shadow: var(--shadow); }
.page-hero.with-media { display: grid; grid-template-columns: 1.15fr .85fr; gap: 34px; align-items: center; }
.page-hero img { max-height: 360px; width: 100%; object-fit: contain; border-radius: 18px; }
.article-grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: 24px; align-items: start; }
.article-main, .article-side { padding: 26px; border-radius: 22px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.article-side { position: sticky; top: 154px; }
.service-steps { counter-reset: step; display: grid; gap: 14px; }
.service-step { position: relative; padding: 18px 18px 18px 66px; background: #fff; border: 1px solid var(--line); border-radius: 16px; }
.service-step::before { counter-increment: step; content: counter(step, decimal-leading-zero); position: absolute; left: 18px; top: 16px; color: var(--primary); font-weight: 900; font-size: 20px; }
.contact-list { display: grid; gap: 12px; }
.contact-list div { padding: 16px; background: var(--surface-lighter); border-radius: 14px; }
.site-footer { margin-top: 54px; background: var(--footer); color: #EAF8FF; padding: 50px 0 0; }
.footer-grid { width: min(1180px, calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: 1.5fr repeat(3,1fr); gap: 30px; }
.footer-grid h2 { color: #fff; font-size: 18px; }
.footer-grid a { display: block; color: #cdeeff; margin: 7px 0; }
.footer-grid a:hover { color: #fff; }
.footer-logo img { width: 160px; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 420px; color: #cde6f5; }
.footer-notice { width: min(1180px, calc(100% - 40px)); margin: 34px auto 0; padding: 20px 0; border-top: 1px solid rgba(255,255,255,.12); color: #cde6f5; }
.footer-bottom { margin-top: 0; padding: 18px 20px; text-align: center; background: rgba(0,0,0,.12); color: #bcd8e8; }
@media (max-width: 1280px) { .service-float { display: none; } }
@media (max-width: 980px) {
    .main-nav a { padding-inline: 10px; font-size: 14px; }
    .header-inner { grid-template-columns: 170px 1fr auto; gap: 14px; }
    .quick-grid, .triple-grid, .review-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .info-board { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .hero-card, .page-hero.with-media, .article-grid { grid-template-columns: 1fr; }
    .article-side { position: static; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 760px) {
    :root { --header-h: 68px; --channel-h: 0px; }
    .desktop-header, .channel-bar { display: none; }
    .mobile-header { width: 100%; height: var(--header-h); padding: 0 14px; display: grid; grid-template-columns: 48px 1fr auto; align-items: center; gap: 10px; }
    .mobile-logo { justify-self: center; }
    .mobile-logo img { width: 126px; max-height: 42px; }
    .mobile-register { min-height: 38px; padding: 0 16px; font-size: 14px; }
    .menu-toggle { width: 42px; height: 42px; border: 0; background: #eaf7ff; border-radius: 12px; display: grid; place-content: center; gap: 5px; cursor: pointer; }
    .menu-toggle span { display: block; width: 21px; height: 2px; background: var(--primary-dark); border-radius: 99px; }
    .mobile-drawer { display: block; position: fixed; z-index: 1300; inset: 0 auto 0 0; width: min(84vw, 320px); background: #fff; transform: translateX(-102%); transition: transform .24s ease; box-shadow: 20px 0 50px rgba(8,42,70,.18); overflow-y: auto; }
    .mobile-drawer.open { transform: translateX(0); }
    .drawer-overlay { position: fixed; z-index: 1250; inset: 0; background: rgba(8,42,70,.42); opacity: 0; transition: opacity .22s ease; }
    .drawer-overlay.show { opacity: 1; }
    .drawer-head { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; justify-content: space-between; padding: 16px; background: #fff; border-bottom: 1px solid var(--line); }
    .drawer-head .brand-logo img { width: 138px; }
    .drawer-close { border: 0; width: 38px; height: 38px; border-radius: 50%; background: var(--surface-soft); color: var(--primary-dark); font-size: 27px; cursor: pointer; }
    .drawer-nav { padding: 12px 12px 30px; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 8px; }
    .drawer-nav a { padding: 11px 10px; border-radius: 12px; color: var(--deep); background: #f6fbfe; font-size: 14px; }
    .drawer-nav a.active { color: #fff; background: var(--primary); }
    .site-main { padding-top: var(--header-h); }
    .container, .hero-card, .page-hero, .banner-slider { width: min(100% - 24px, 1180px); }
    .banner-slider { margin-top: 14px; border-radius: 16px; }
    .slides { aspect-ratio: 16/8.7; min-height: 170px; }
    .slider-arrow { width: 38px; height: 38px; font-size: 22px; }
    .slider-arrow.prev { left: 10px; } .slider-arrow.next { right: 10px; }
    .section { padding: 30px 0; }
    .hero-card, .page-hero { padding: 24px 20px; }
    .quick-grid, .triple-grid, .dual-grid, .review-grid, .info-board, .content-panel.media { grid-template-columns: 1fr; }
    .quick-card p { min-height: auto; }
    .section-head { align-items: start; flex-direction: column; gap: 8px; }
    .footer-grid { grid-template-columns: 1fr; }
    .site-footer { padding-bottom: 76px; }
    .mobile-bottom-nav { position: fixed; z-index: 1100; left: 0; right: 0; bottom: 0; height: 64px; padding-bottom: env(safe-area-inset-bottom); background: rgba(255,255,255,.96); backdrop-filter: blur(12px); border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(4,1fr); box-shadow: 0 -8px 24px rgba(8,119,201,.08); }
    .mobile-bottom-nav a { display: grid; place-items: center; color: var(--primary-dark); font-weight: 800; font-size: 13px; }
    .site-main { padding-bottom: 22px; }
}
@media (max-width: 430px) {
    .mobile-header { grid-template-columns: 44px 1fr auto; padding-inline: 10px; }
    .mobile-logo img { width: 112px; }
    .mobile-register { padding-inline: 13px; }
    .drawer-nav { grid-template-columns: 1fr 1fr; }
    h1 { font-size: 30px; }
}