:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #EAF7FF;
    --surface-pale: #F2FAFF;
    --blue: #1CA8F6;
    --blue-light: #38C7FF;
    --blue-dark: #0877C9;
    --cyan: #7FE4FF;
    --ink: #223044;
    --muted: #5F7082;
    --navy: #1D2A3A;
    --footer: #082A46;
    --line: rgba(28, 168, 246, .14);
    --shadow: 0 16px 40px rgba(8, 119, 201, .08);
    --shadow-strong: 0 20px 55px rgba(8, 119, 201, .12);
    --radius: 22px;
    --header-height: 76px;
    --channel-height: 56px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: "PingFang SC", "Microsoft YaHei", Arial, 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%; height: auto; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
.container { width: min(1200px, calc(100% - 40px)); margin: 0 auto; }
.site-main { padding-top: calc(var(--header-height) + var(--channel-height)); }
.section-space { padding: 72px 0; }
.compact-top { padding-top: 24px; }
.tint-section { background: linear-gradient(180deg, rgba(234,247,255,.72), rgba(244,251,255,.15)); }

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    background: rgba(255,255,255,.94);
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 24px rgba(8,119,201,.08);
}
.header-main { height: var(--header-height); display: flex; align-items: center; gap: 28px; }
.brand-logo { width: 170px; flex: 0 0 auto; }
.brand-logo img { max-height: 48px; width: auto; object-fit: contain; }
.core-nav { display: flex; align-items: center; justify-content: center; gap: 8px; flex: 1; min-width: 0; }
.core-nav a { position: relative; padding: 12px 15px; border-radius: 999px; color: var(--navy); font-weight: 700; white-space: nowrap; }
.core-nav a:hover, .core-nav a.is-active { color: var(--blue-dark); background: var(--surface-soft); }
.core-nav a.is-active::after { content: ""; position: absolute; left: 22px; right: 22px; bottom: 5px; height: 2px; border-radius: 3px; background: var(--blue); }
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 24px;
    border: 0;
    border-radius: 999px;
    color: #fff;
    font-weight: 800;
    background: linear-gradient(135deg, #38C7FF 0%, #1CA8F6 48%, #0877C9 100%);
    box-shadow: 0 12px 26px rgba(8,119,201,.18);
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(8,119,201,.24); }
.header-register { flex: 0 0 auto; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 9px; border: 0; border-radius: 14px; background: var(--surface-soft); }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 3px; background: var(--blue-dark); }
.channel-bar { border-top: 1px solid var(--line); background: rgba(234,247,255,.88); }
.channel-scroll { height: var(--channel-height); display: flex; align-items: center; gap: 10px; overflow-x: auto; scrollbar-width: none; }
.channel-scroll::-webkit-scrollbar { display: none; }
.channel-scroll a { flex: 0 0 auto; padding: 7px 13px; border: 1px solid rgba(28,168,246,.12); border-radius: 999px; color: var(--muted); font-size: 14px; background: rgba(255,255,255,.78); }
.channel-scroll a:hover, .channel-scroll a.is-active { color: #fff; border-color: transparent; background: var(--blue); }

.drawer-overlay { position: fixed; inset: 0; z-index: 1290; opacity: 0; pointer-events: none; background: rgba(8,42,70,.42); transition: opacity .25s ease; }
.mobile-drawer { position: fixed; z-index: 1300; inset: 0 auto 0 0; width: min(84vw, 320px); padding: 18px; overflow-y: auto; transform: translateX(-105%); background: #fff; box-shadow: 24px 0 50px rgba(8,42,70,.18); transition: transform .28s ease; }
.drawer-open .drawer-overlay { opacity: 1; pointer-events: auto; }
.drawer-open .mobile-drawer { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.drawer-logo img { max-height: 44px; width: auto; }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 50%; color: var(--blue-dark); font-size: 28px; line-height: 1; background: var(--surface-soft); }
.drawer-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; padding: 18px 0; }
.drawer-nav a { padding: 10px 12px; border-radius: 12px; color: var(--ink); background: var(--surface-pale); font-size: 14px; }
.drawer-nav a.is-active { color: #fff; background: var(--blue); }
.drawer-note { padding: 14px; border-radius: 14px; color: var(--muted); font-size: 13px; background: var(--surface-soft); }

.service-float { position: fixed; z-index: 900; right: 18px; top: 50%; display: grid; gap: 8px; width: 108px; padding: 12px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.96); box-shadow: var(--shadow); transform: translateY(-38%); }
.service-float a, .service-float button { display: block; padding: 9px 7px; border: 0; border-radius: 12px; color: var(--blue-dark); text-align: center; font-size: 13px; background: var(--surface-pale); }
.service-float .float-register { color: #fff; font-weight: 800; background: linear-gradient(135deg, var(--blue-light), var(--blue-dark)); }

.banner-wrap { padding: 24px 0 34px; }
.banner-slider { max-width: 1200px; margin: 0 auto; border-radius: 22px; background: #fff; box-shadow: 0 16px 40px rgba(8,119,201,.10); overflow: hidden; position: relative; z-index: 1; aspect-ratio: 16 / 6.3; }
.banner-track, .banner-slide { position: absolute; inset: 0; }
.banner-slide { opacity: 0; pointer-events: none; transition: opacity .45s ease; }
.banner-slide.is-active { opacity: 1; pointer-events: auto; }
.banner-slide img { width: 100%; height: 100%; object-fit: contain; background: #fff; }
.slider-arrow { position: absolute; z-index: 3; top: 50%; width: 44px; height: 44px; border: 0; border-radius: 50%; color: #fff; font-size: 31px; line-height: 1; background: rgba(8,119,201,.76); transform: translateY(-50%); }
.slider-arrow:hover { background: var(--blue-dark); }
.slider-arrow.prev { left: 18px; }
.slider-arrow.next { right: 18px; }
.slider-dots { position: absolute; z-index: 3; left: 50%; bottom: 16px; display: flex; gap: 8px; transform: translateX(-50%); }
.slider-dot { width: 9px; height: 9px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.78); box-shadow: 0 0 0 1px rgba(8,119,201,.25); }
.slider-dot.is-active { width: 28px; border-radius: 999px; background: var(--blue); }

.eyebrow { display: inline-flex; margin-bottom: 12px; color: var(--blue); font-size: 13px; font-weight: 900; letter-spacing: .12em; }
h1, h2, h3, .section-title { margin: 0 0 16px; color: var(--blue-dark); line-height: 1.3; }
h1 { font-size: clamp(34px, 4.5vw, 60px); }
h2 { font-size: clamp(26px, 3vw, 38px); }
h3 { font-size: 20px; }
p { margin: 0 0 16px; }
.lead { max-width: 760px; color: var(--muted); font-size: clamp(16px, 2vw, 19px); }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--blue); font-weight: 800; }
.text-link::after { content: "→"; }
.section-heading { max-width: 760px; margin: 0 auto 34px; text-align: center; }
.section-heading.left { margin-left: 0; text-align: left; }
.section-heading p { color: var(--muted); }

.brand-intro-grid, .inner-hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 42px; align-items: center; }
.brand-copy, .inner-hero-grid > div, .inner-visual { padding: clamp(24px, 4vw, 46px); border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.brand-copy .actions, .hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 26px; }
.brand-visual, .inner-visual { min-height: 340px; display: grid; place-items: center; background: linear-gradient(145deg, #fff, #EAF7FF); }
.brand-visual img, .inner-visual img { width: 100%; max-height: 420px; object-fit: contain; }
.inner-hero-grid.no-image { grid-template-columns: 1fr; }
.inner-hero-grid.no-image > div { max-width: 940px; }

.quick-categories { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.quick-pill { padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: 0 10px 30px rgba(8,119,201,.06); }
.quick-pill h3 { margin-bottom: 7px; font-size: 17px; }
.quick-pill p { min-height: 48px; margin-bottom: 8px; color: var(--muted); font-size: 14px; }
.platform-strip { display: grid; grid-template-columns: auto 1fr; gap: 26px; align-items: center; padding: 28px 32px; border: 1px solid rgba(127,228,255,.5); border-radius: 22px; background: linear-gradient(110deg, #fff, #EAF7FF); box-shadow: var(--shadow); }
.platform-strip strong { color: var(--blue-dark); font-size: 22px; white-space: nowrap; }
.platform-strip p { margin: 0; color: var(--muted); }

.info-board, .service-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.info-card, .card, .zone-card, .review-card, .article-card { background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.info-card { padding: 24px; border-radius: 20px; }
.info-card > span, .card-index { display: inline-flex; margin-bottom: 16px; color: var(--blue); font-weight: 900; font-size: 14px; }
.info-card p { margin: 0; color: var(--muted); font-size: 14px; }
.dual-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.triple-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.content-card { overflow: hidden; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.content-card figure { min-height: 220px; margin: 0; padding: 18px; display: grid; place-items: center; background: linear-gradient(145deg, #F8FDFF, #EAF7FF); }
.content-card figure img { width: 100%; max-height: 280px; object-fit: contain; }
.content-card-body { padding: 26px; }
.content-card-body p { color: var(--muted); }
.feature-list, .check-list { margin: 18px 0 20px; padding: 0; list-style: none; }
.feature-list li, .check-list li { position: relative; margin: 10px 0; padding-left: 24px; color: var(--muted); }
.feature-list li::before, .check-list li::before { content: ""; position: absolute; left: 0; top: .78em; width: 8px; height: 8px; border-radius: 50%; background: var(--blue-light); box-shadow: 0 0 0 5px rgba(56,199,255,.14); }
.zone-card { overflow: hidden; border-radius: 20px; }
.zone-card img { width: 100%; height: 190px; padding: 14px; object-fit: contain; background: var(--surface-pale); }
.zone-card-body { padding: 22px; }
.zone-card-body p { color: var(--muted); }
.text-wall-card { padding: 28px; border-radius: var(--radius); background: linear-gradient(145deg, #fff, #F2FAFF); border: 1px solid var(--line); box-shadow: var(--shadow); }
.text-wall-card p { color: var(--muted); }
.horizontal-feature { display: grid; grid-template-columns: 1fr 1.15fr; gap: 28px; align-items: center; padding: 28px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.horizontal-feature img { width: 100%; max-height: 340px; object-fit: contain; }
.horizontal-feature .feature-copy { padding: 10px; }

.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.review-card { margin: 0; padding: 24px; border-radius: 18px; }
.review-card p { margin: 0; color: var(--muted); }
.faq-shell { padding: 34px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 0; }
.faq-list summary { position: relative; padding: 18px 42px 18px 0; color: var(--navy); font-weight: 800; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 14px; width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; color: var(--blue-dark); background: var(--surface-soft); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { padding: 0 36px 18px 0; color: var(--muted); }
.compliance-panel { display: grid; grid-template-columns: .75fr 1.6fr auto; gap: 26px; align-items: center; padding: 30px; border-radius: var(--radius); color: #EAF8FF; background: linear-gradient(135deg, #0B416A, #0877C9); box-shadow: var(--shadow-strong); }
.compliance-panel h2, .compliance-panel .eyebrow, .compliance-panel .text-link { color: #fff; }
.compliance-panel p { margin: 0; color: rgba(234,248,255,.9); }

.article-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.article-card { padding: 30px; border-radius: var(--radius); }
.article-card-wide { grid-column: 1 / -1; }
.article-card p { color: var(--muted); }
.article-card p:last-child { margin-bottom: 0; }

.site-footer { margin-top: 74px; padding: 58px 0 24px; color: #EAF8FF; background: var(--footer); }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 34px; }
.footer-brand img { max-height: 54px; width: auto; margin-bottom: 18px; filter: brightness(0) invert(1); }
.site-footer h2 { margin-bottom: 16px; color: #fff; font-size: 17px; }
.site-footer p, .site-footer a { color: rgba(234,248,255,.78); font-size: 14px; }
.footer-links { display: grid; gap: 9px; }
.site-footer a:hover { color: #fff; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 42px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); color: rgba(234,248,255,.65); font-size: 13px; }
.footer-bottom div { display: flex; gap: 18px; }
.mobile-bottom-nav { display: none; }

@media (max-width: 1280px) {
    .service-float { display: none; }
}
@media (max-width: 980px) {
    :root { --header-height: 68px; }
    .core-nav { gap: 2px; }
    .core-nav a { padding: 10px 9px; font-size: 14px; }
    .brand-logo { width: 145px; }
    .brand-intro-grid, .inner-hero-grid, .horizontal-feature { grid-template-columns: 1fr; }
    .inner-visual { order: -1; min-height: 250px; }
    .quick-categories { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .info-board, .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .triple-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .compliance-panel { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
    :root { --header-height: 64px; --channel-height: 0px; }
    .container { width: min(100% - 28px, 1200px); }
    .site-main { padding-top: var(--header-height); }
    .section-space { padding: 50px 0; }
    .header-main { height: var(--header-height); display: grid; grid-template-columns: 46px 1fr auto; gap: 10px; }
    .menu-toggle { display: block; }
    .brand-logo { width: auto; justify-self: center; }
    .brand-logo img { max-height: 38px; max-width: 145px; }
    .core-nav, .channel-bar { display: none; }
    .header-register { min-height: 38px; padding: 0 17px; font-size: 14px; }
    .banner-wrap { padding: 14px 0 24px; }
    .banner-slider { width: calc(100% - 28px); border-radius: 16px; aspect-ratio: 16 / 8.2; }
    .slider-arrow { width: 36px; height: 36px; font-size: 25px; }
    .slider-arrow.prev { left: 10px; }
    .slider-arrow.next { right: 10px; }
    .slider-dots { bottom: 10px; }
    .brand-copy, .inner-hero-grid > div, .inner-visual { padding: 24px; }
    .brand-visual, .inner-visual { min-height: 210px; }
    .quick-categories, .info-board, .service-grid, .dual-grid, .triple-grid, .review-grid, .article-grid { grid-template-columns: 1fr; }
    .article-card-wide { grid-column: auto; }
    .quick-pill p { min-height: auto; }
    .platform-strip { grid-template-columns: 1fr; gap: 10px; padding: 24px; }
    .platform-strip strong { white-space: normal; }
    .content-card figure { min-height: 180px; }
    .zone-card img { height: auto; max-height: 230px; }
    .faq-shell { padding: 24px; }
    .compliance-panel { padding: 24px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { align-items: flex-start; flex-direction: column; padding-bottom: 74px; }
    .mobile-bottom-nav { position: fixed; z-index: 1100; left: 12px; right: 12px; bottom: max(10px, env(safe-area-inset-bottom)); display: grid; grid-template-columns: repeat(4, 1fr); padding: 8px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.96); backdrop-filter: blur(12px); box-shadow: 0 16px 40px rgba(8,42,70,.18); }
    .mobile-bottom-nav a { display: grid; place-items: center; min-height: 46px; border-radius: 14px; color: var(--muted); font-size: 13px; font-weight: 800; }
    .mobile-bottom-nav a.is-active { color: #fff; background: var(--blue); }
    .site-footer { margin-bottom: 74px; }
}
@media (max-width: 420px) {
    .drawer-nav { grid-template-columns: 1fr; }
    h1 { font-size: 32px; }
    h2 { font-size: 25px; }
    .hero-actions { align-items: flex-start; flex-direction: column; }
}