:root {
    --bg: #F4FBFF;
    --white: #FFFFFF;
    --soft: #EAF7FF;
    --soft-2: #F2FAFF;
    --primary: #1CA8F6;
    --bright: #38C7FF;
    --deep: #0877C9;
    --cyan: #7FE4FF;
    --ink: #1D2A3A;
    --text: #223044;
    --muted: #5F7082;
    --quiet: #7A8A9A;
    --footer: #082A46;
    --shadow: 0 16px 40px rgba(8,119,201,.09);
    --border: 1px solid rgba(28,168,246,.13);
    --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    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, a { touch-action: manipulation; }
button { font: inherit; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 900;
    background: rgba(255,255,255,.94);
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 24px rgba(8,119,201,.08);
}
.desktop-header { background: rgba(255,255,255,.94); }
.header-inner {
    width: min(1200px, calc(100% - 36px));
    min-height: 76px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 220px 1fr auto;
    align-items: center;
    gap: 24px;
}
.brand-logo { display: inline-flex; align-items: center; width: 178px; }
.brand-logo img { width: 100%; height: 48px; object-fit: contain; object-position: left center; }
.nav-core { display: flex; justify-content: center; gap: clamp(18px, 3vw, 38px); min-width: 0; }
.nav-core a { color: var(--ink); position: relative; font-weight: 700; white-space: nowrap; padding: 24px 0; }
.nav-core a:hover, .nav-core a.active { color: var(--primary); }
.nav-core a.active::after { content: ""; position: absolute; left: 50%; bottom: 12px; width: 28px; height: 3px; border-radius: 999px; background: var(--primary); transform: translateX(-50%); }
.main-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 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; position: relative; z-index: 2; }
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 30px rgba(8,119,201,.26); }
.header-register { min-width: 86px; }

.channel-bar { background: rgba(234,247,255,.88); border-top: 1px solid rgba(28,168,246,.1); border-bottom: 1px solid rgba(28,168,246,.1); overflow-x: auto; white-space: nowrap; scrollbar-width: thin; }
.channel-inner { width: min(1200px, calc(100% - 36px)); margin: 0 auto; display: flex; gap: 8px; padding: 10px 0; }
.channel-bar a { color: var(--muted); border-radius: 999px; padding: 6px 12px; font-size: 14px; }
.channel-bar a:hover, .channel-bar a.active { color: var(--deep); background: rgba(28,168,246,.09); }

.mobile-header { display: none; }
.drawer-overlay { position: fixed; inset: 0; z-index: 999; background: rgba(8,42,70,.42); opacity: 0; visibility: hidden; transition: .25s; }
.mobile-drawer { position: fixed; left: 0; top: 0; bottom: 0; width: min(84vw, 320px); z-index: 1000; background: #fff; transform: translateX(-105%); transition: transform .25s ease; box-shadow: 20px 0 50px rgba(8,42,70,.18); overflow-y: auto; overscroll-behavior: contain; }
.mobile-drawer.open { transform: translateX(0); }
body.drawer-open .drawer-overlay { opacity: 1; visibility: visible; }
.drawer-head { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; justify-content: space-between; padding: 16px; background: #fff; border-bottom: var(--border); }
.drawer-head img { width: 150px; height: 42px; object-fit: contain; object-position: left center; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 50%; background: var(--soft); color: var(--deep); font-size: 30px; line-height: 1; cursor: pointer; }
.drawer-nav { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 8px; padding: 14px 16px 32px; }
.drawer-nav a { padding: 11px 12px; border-radius: 12px; color: var(--ink); background: var(--soft-2); font-weight: 600; font-size: 14px; }
.drawer-nav a.active, .drawer-nav a:hover { background: rgba(28,168,246,.14); color: var(--deep); }

.floating-service { position: fixed; right: 18px; top: 42%; z-index: 60; display: grid; gap: 8px; }
.floating-service a, .floating-service button { min-width: 84px; border-radius: 14px; background: #fff; color: var(--deep); border: 1px solid rgba(28,168,246,.14); box-shadow: 0 14px 30px rgba(8,119,201,.1); padding: 10px 12px; text-align: center; cursor: pointer; }
.floating-service a.register-link { background: linear-gradient(135deg, #38C7FF 0%, #1CA8F6 48%, #0877C9 100%); color: #fff; border: 0; font-weight: 800; }

.section-wrap { width: min(1200px, calc(100% - 36px)); margin: 34px auto; }
.home-main, .page-main { padding-bottom: 20px; }
.section-heading { margin-bottom: 18px; }
.section-heading h2, .section-wrap h2, .section-wrap h1 { margin: 0; color: var(--deep); line-height: 1.3; }
.section-kicker { display: inline-block; margin-bottom: 8px; color: var(--primary); font-weight: 800; letter-spacing: .06em; }
.text-link, .nav a { color: var(--primary); font-weight: 800; }
.text-link:hover { color: var(--deep); }

.banner-slider { margin-top: 24px; border-radius: 22px; background: #fff; box-shadow: 0 16px 40px rgba(8,119,201,.10); overflow: hidden; position: relative; z-index: 1; height: clamp(280px, 31vw, 380px); }
.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; }
.slider-arrow { position: absolute; top: 50%; transform: translateY(-50%); z-index: 3; width: 46px; height: 46px; border: 0; border-radius: 999px; background: rgba(255,255,255,.9); color: var(--primary); box-shadow: 0 8px 20px rgba(8,119,201,.14); cursor: pointer; font-size: 32px; 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: 10px; height: 10px; border-radius: 50%; border: 0; background: rgba(28,168,246,.24); padding: 0; cursor: pointer; }
.slider-dots button.active { background: var(--primary); }

.brand-intro { display: grid; grid-template-columns: 1.1fr .9fr; gap: 32px; align-items: center; padding: 34px; background: linear-gradient(135deg,#fff 0%,#edf8ff 100%); border: var(--border); box-shadow: var(--shadow); border-radius: var(--radius); }
.brand-copy h1 { font-size: clamp(30px, 4.5vw, 52px); margin-bottom: 18px; }
.brand-copy p { color: var(--muted); margin: 0 0 14px; }
.brand-image { min-height: 300px; border-radius: 18px; background: #fff; display: grid; place-items: center; padding: 18px; overflow: hidden; }
.brand-image img { width: 100%; height: 300px; object-fit: contain; }

.pill-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
.pill-grid a { background: #fff; border: var(--border); border-radius: 18px; padding: 18px; box-shadow: 0 12px 28px rgba(8,119,201,.06); transition: .2s; }
.pill-grid a:hover { transform: translateY(-3px); border-color: rgba(28,168,246,.28); }
.pill-grid strong { display: block; color: var(--deep); font-size: 18px; }
.pill-grid span { display: block; margin: 6px 0; color: var(--muted); font-size: 14px; }
.pill-grid em { color: var(--primary); font-style: normal; font-weight: 700; font-size: 14px; }

.platform-strip { display: grid; grid-template-columns: .8fr 1.2fr; gap: 26px; align-items: center; padding: 28px 32px; background: linear-gradient(90deg,#fff,#eaf7ff); border-radius: var(--radius); border: var(--border); }
.platform-strip p { margin: 0; color: var(--muted); }

.board-grid, .feature-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 16px; }
.info-card, .card, .zone-card, .review-card, .prose-card { background: #fff; border: var(--border); box-shadow: var(--shadow); border-radius: var(--radius); }
.info-card { padding: 24px; }
.info-card .num { color: var(--primary); font-weight: 900; font-size: 13px; }
.info-card h3 { color: var(--deep); margin: 8px 0; font-size: 20px; }
.info-card p { color: var(--muted); margin: 0; }

.two-column-content, .feature-pair, .notice-grid, .split-section { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; }
.zone-card { padding: 22px; overflow: hidden; }
.zone-card img { width: 100%; height: 190px; object-fit: contain; background: var(--soft-2); border-radius: 16px; margin-bottom: 18px; }
.zone-card h2 { margin-bottom: 8px; }
.zone-card p { color: var(--muted); }
.zone-card ul { padding-left: 20px; color: var(--muted); }
.with-image { display: grid; grid-template-columns: .9fr 1.1fr; gap: 22px; align-items: center; }
.with-image img { margin: 0; height: 260px; }
.text-only { display: flex; flex-direction: column; justify-content: center; }
.card-trio, .horizontal-zones { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
.app-highlight { border-color: rgba(28,168,246,.32); }
.notice-grid .card { padding: 28px; }
.notice-grid .card p { color: var(--muted); }

.review-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
.review-card { margin: 0; padding: 22px; color: var(--muted); }

.faq-list { display: grid; gap: 12px; }
.faq-list details { background: #fff; border: var(--border); border-radius: 16px; padding: 0 20px; box-shadow: 0 10px 24px rgba(8,119,201,.05); }
.faq-list summary { cursor: pointer; list-style: none; padding: 17px 34px 17px 0; color: var(--ink); font-weight: 800; position: relative; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 0; top: 13px; color: var(--primary); font-size: 26px; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list p { color: var(--muted); margin: 0 0 18px; }

.about-summary, .compliance-panel { padding: 30px; background: linear-gradient(135deg,#fff,#edf8ff); border: var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.about-summary { display: grid; grid-template-columns: .75fr 1.25fr; gap: 24px; align-items: center; }
.about-summary p { color: var(--muted); margin: 0; }
.inline-links, .compliance-links { display: flex; flex-wrap: wrap; gap: 12px; }
.inline-links a, .compliance-links a { color: var(--deep); background: #fff; border: var(--border); border-radius: 999px; padding: 8px 14px; font-weight: 700; }
.compliance-panel p { color: var(--muted); }

.page-hero { margin-top: 28px; display: grid; grid-template-columns: 1.08fr .92fr; gap: 30px; align-items: center; padding: 34px; background: linear-gradient(135deg,#fff,#eaf7ff); border: var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.page-hero h1 { font-size: clamp(32px, 4.2vw, 50px); margin-bottom: 16px; }
.hero-lead { color: var(--muted); font-size: 18px; }
.hero-visual { background: #fff; border-radius: 18px; padding: 18px; min-height: 270px; display: grid; place-items: center; overflow: hidden; }
.hero-visual img { width: 100%; height: 270px; object-fit: contain; }
.prose-card { padding: 30px; }
.prose-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 24px; }
.prose-grid p { margin: 0; color: var(--muted); }
.feature-grid { margin-top: 18px; }
.feature-grid .info-card { min-height: 210px; }
.split-section .card { padding: 28px; }
.check-list { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 30px; color: var(--muted); }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; width: 22px; height: 22px; border-radius: 50%; background: var(--soft); color: var(--deep); display: grid; place-items: center; font-weight: 900; }
.quote-list { display: grid; gap: 12px; margin-top: 18px; }
.quote-list blockquote { margin: 0; padding: 16px; border-radius: 14px; background: var(--soft-2); color: var(--muted); }

.site-footer { margin-top: 50px; background: var(--footer); color: #EAF8FF; }
.footer-inner { width: min(1200px, calc(100% - 36px)); margin: 0 auto; padding: 46px 0 32px; display: grid; grid-template-columns: 1fr 1.5fr; gap: 42px; }
.footer-brand img { width: 180px; height: 54px; object-fit: contain; object-position: left center; filter: brightness(0) invert(1); }
.footer-brand p { color: rgba(234,248,255,.75); max-width: 460px; }
.footer-links { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.footer-links h3 { color: #fff; margin-top: 0; }
.footer-links a { display: block; color: rgba(234,248,255,.72); margin: 8px 0; }
.footer-links a:hover { color: #fff; }
.footer-notice { border-top: 1px solid rgba(234,248,255,.12); width: min(1200px, calc(100% - 36px)); margin: 0 auto; padding: 18px 0 28px; color: rgba(234,248,255,.68); font-size: 13px; display: flex; justify-content: space-between; gap: 20px; }
.footer-notice p { margin: 0; }
.mobile-bottom-nav { display: none; }

@media (max-width: 1100px) {
    .floating-service { display: none; }
    .header-inner { grid-template-columns: 180px 1fr auto; gap: 16px; }
    .nav-core { gap: 18px; }
    .board-grid, .feature-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .review-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 820px) {
    body { padding-bottom: calc(74px + env(safe-area-inset-bottom)); }
    .desktop-header, .channel-bar { display: none; }
    .mobile-header { min-height: 66px; display: grid; grid-template-columns: 56px 1fr 76px; align-items: center; gap: 10px; padding: 8px 12px; position: relative; z-index: 901; background: rgba(255,255,255,.96); }
    .menu-toggle { width: 48px; height: 44px; border: 0; border-radius: 12px; background: var(--soft); display: grid; place-content: center; gap: 5px; cursor: pointer; position: relative; z-index: 905; pointer-events: auto; }
    .menu-toggle span { width: 22px; height: 2px; background: var(--deep); border-radius: 99px; }
    .mobile-logo { display: flex; justify-content: center; min-width: 0; }
    .mobile-logo img { width: min(150px, 100%); height: 42px; object-fit: contain; }
    .mobile-register { min-width: 72px; min-height: 40px; padding: 8px 14px; font-size: 14px; z-index: 905; pointer-events: auto; }
    .section-wrap { width: min(100% - 24px, 720px); margin: 24px auto; }
    .banner-slider { height: clamp(170px, 48vw, 220px); margin-top: 16px; border-radius: 16px; }
    .slider-arrow { width: 40px; height: 40px; font-size: 28px; }
    .brand-intro, .platform-strip, .page-hero, .about-summary { grid-template-columns: 1fr; padding: 24px; }
    .brand-image { min-height: 220px; }
    .brand-image img { height: 220px; }
    .pill-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .two-column-content, .feature-pair, .notice-grid, .split-section { grid-template-columns: 1fr; }
    .with-image { grid-template-columns: 1fr; }
    .with-image img { height: 220px; }
    .card-trio, .horizontal-zones { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .page-hero { margin-top: 18px; }
    .hero-visual { min-height: 230px; }
    .hero-visual img { height: 230px; }
    .prose-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 24px; }
    .footer-notice { flex-direction: column; }
    .mobile-bottom-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 850; display: grid; grid-template-columns: repeat(4,1fr); background: rgba(255,255,255,.97); backdrop-filter: blur(14px); border-top: var(--border); padding: 7px 8px calc(7px + env(safe-area-inset-bottom)); box-shadow: 0 -10px 28px rgba(8,119,201,.1); pointer-events: auto; }
    .mobile-bottom-nav a { display: grid; justify-items: center; gap: 2px; color: var(--muted); font-size: 12px; font-weight: 700; padding: 4px; border-radius: 10px; pointer-events: auto; }
    .mobile-bottom-nav a span { width: 28px; height: 28px; border-radius: 50%; background: var(--soft); color: var(--deep); display: grid; place-items: center; font-size: 12px; }
    .mobile-bottom-nav a.active { color: var(--deep); }
    .mobile-bottom-nav a.active span { color: #fff; background: linear-gradient(135deg,#38C7FF,#0877C9); }
}

@media (max-width: 560px) {
    .section-wrap { width: calc(100% - 20px); }
    .brand-intro, .platform-strip, .page-hero, .prose-card, .about-summary, .compliance-panel { padding: 20px; }
    .brand-copy h1, .page-hero h1 { font-size: 30px; }
    .brand-image, .hero-visual { min-height: 190px; padding: 12px; }
    .brand-image img, .hero-visual img { height: 190px; }
    .pill-grid, .board-grid, .feature-grid, .card-trio, .horizontal-zones, .review-grid { grid-template-columns: 1fr; }
    .zone-card img { height: 170px; }
    .footer-links { grid-template-columns: 1fr 1fr; }
    .drawer-nav { grid-template-columns: 1fr 1fr; }
    .slider-arrow { width: 36px; height: 36px; }
    .slider-arrow.prev { left: 8px; }
    .slider-arrow.next { right: 8px; }
}