:root {
  --bg: #F4FBFF;
  --surface: #FFFFFF;
  --surface-soft: #EAF7FF;
  --surface-pale: #F2FAFF;
  --primary: #1CA8F6;
  --primary-bright: #38C7FF;
  --primary-dark: #0877C9;
  --cyan: #7FE4FF;
  --ink: #223044;
  --ink-strong: #1D2A3A;
  --muted: #5F7082;
  --muted-2: #7A8A9A;
  --footer: #082A46;
  --radius: 22px;
  --shadow: 0 16px 40px rgba(8,119,201,.09);
  --header-height: 124px;
}

* { 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;
  padding-top: var(--header-height);
}
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; }
.shell { width: min(1200px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 999; background: #fff; color: var(--primary-dark); padding: 10px 14px; border-radius: 10px; box-shadow: var(--shadow); }
.skip-link:focus { top: 12px; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 100; background: rgba(255,255,255,.94); backdrop-filter: blur(12px); box-shadow: 0 8px 24px rgba(8,119,201,.08); }
.header-main { height: 74px; display: grid; grid-template-columns: 188px 1fr auto; align-items: center; gap: 28px; }
.brand-logo { display: inline-flex; align-items: center; width: 150px; height: 48px; }
.brand-logo img { max-width: 150px; max-height: 48px; object-fit: contain; }
.nav-core { display: flex; align-items: center; justify-content: center; gap: clamp(18px, 3vw, 38px); min-width: 0; }
.nav-core a { color: var(--ink-strong); position: relative; font-weight: 650; white-space: nowrap; padding: 10px 2px; }
.nav-core a:hover, .nav-core a.active { color: var(--primary); }
.nav-core a.active::after { content: ""; position: absolute; left: 50%; bottom: 1px; 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: 42px; 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: 700; transition: transform .2s ease, box-shadow .2s ease; white-space: nowrap; }
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(8,119,201,.25); }
.channel-bar { height: 50px; background: rgba(234,247,255,.88); border-top: 1px solid rgba(28,168,246,.10); border-bottom: 1px solid rgba(28,168,246,.10); overflow-x: auto; white-space: nowrap; scrollbar-width: thin; }
.channel-inner { display: flex; align-items: center; gap: 8px; height: 100%; }
.channel-bar a { color: var(--muted); border-radius: 999px; padding: 6px 12px; font-size: 14px; line-height: 1.4; }
.channel-bar a:hover, .channel-bar a.active { color: var(--primary-dark); background: rgba(28,168,246,.09); }
.menu-toggle { display: none; width: 42px; height: 42px; border: 0; background: var(--surface-soft); border-radius: 12px; padding: 10px; }
.menu-toggle span { display: block; height: 2px; margin: 4px 0; border-radius: 2px; background: var(--primary-dark); }

.drawer-overlay { position: fixed; inset: 0; z-index: 150; background: rgba(6,35,58,.42); opacity: 0; transition: opacity .25s ease; }
.drawer-overlay.visible { opacity: 1; }
.mobile-drawer { position: fixed; inset: 0 auto 0 0; z-index: 160; width: min(84vw, 320px); background: #fff; transform: translateX(-105%); transition: transform .28s ease; box-shadow: 20px 0 50px rgba(8,42,70,.18); overflow-y: auto; }
.mobile-drawer.open { transform: translateX(0); }
.drawer-head { position: sticky; top: 0; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 18px; background: rgba(255,255,255,.97); border-bottom: 1px solid rgba(28,168,246,.12); }
.drawer-logo img { width: 130px; max-height: 42px; object-fit: contain; }
.drawer-close { width: 38px; height: 38px; border: 0; border-radius: 50%; background: var(--surface-soft); color: var(--primary-dark); font-size: 28px; line-height: 1; }
.drawer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 16px 18px 28px; }
.drawer-nav a { padding: 10px 12px; color: var(--muted); background: var(--surface-pale); border-radius: 12px; font-size: 14px; }
.drawer-nav a.active { color: #fff; background: linear-gradient(135deg, var(--primary-bright), var(--primary-dark)); }

.banner-slider { width: min(1200px, calc(100% - 40px)); height: clamp(280px, 31vw, 380px); 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; }
.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: 44px; height: 44px; border: none; border-radius: 999px; background: rgba(255,255,255,.9); color: var(--primary); box-shadow: 0 8px 20px rgba(8,119,201,.14); font-size: 28px; line-height: 1; }
.slider-arrow:hover { background: #fff; color: var(--primary-dark); }
.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: 9px; height: 9px; padding: 0; border-radius: 50%; border: none; background: rgba(28,168,246,.24); }
.slider-dots button.active { background: var(--primary); }

.page-main { width: min(1200px, calc(100% - 40px)); margin: 0 auto; }
.breadcrumb { width: min(1200px, calc(100% - 40px)); margin: 24px auto 12px; display: flex; gap: 10px; align-items: center; color: var(--muted-2); font-size: 14px; }
.breadcrumb a { color: var(--primary); }
.section-kicker { color: var(--primary); font-weight: 750; font-size: 13px; letter-spacing: .08em; }
h1, h2, h3, .section-title { color: var(--primary-dark); line-height: 1.3; margin-top: 0; }
h1 { font-size: clamp(32px, 5vw, 54px); margin-bottom: 18px; }
h2 { font-size: clamp(24px, 3.6vw, 34px); margin-bottom: 12px; }
h3 { font-size: 19px; margin-bottom: 8px; }
p { margin-top: 0; }
.text-link, .arrow-link { color: var(--primary-dark); font-weight: 700; }
.arrow-link::after { content: " →"; }

.inner-hero, .home-intro { display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(320px, .94fr); gap: 42px; align-items: center; padding: clamp(30px, 5vw, 64px); background: linear-gradient(135deg, #fff 0%, #edf8ff 100%); border: 1px solid rgba(28,168,246,.12); border-radius: 28px; box-shadow: var(--shadow); }
.inner-hero-copy > p, .home-intro-copy > p { color: var(--muted); font-size: 17px; }
.hero-visual { margin: 0; background: #fff; border-radius: 22px; padding: 18px; min-height: 260px; display: grid; place-items: center; }
.hero-visual img { width: 100%; max-height: 300px; object-fit: contain; }

.section-stack { display: grid; gap: 24px; margin-top: 28px; }
.content-section { margin-top: 28px; padding: clamp(26px, 4vw, 46px); background: #fff; border: 1px solid rgba(28,168,246,.12); border-radius: var(--radius); box-shadow: var(--shadow); }
.section-heading { display: grid; grid-template-columns: 52px 1fr; gap: 18px; align-items: start; margin-bottom: 24px; }
.section-heading .num { width: 52px; height: 52px; display: grid; place-items: center; color: var(--primary); background: var(--surface-soft); border-radius: 16px; font-weight: 800; }
.section-heading p { color: var(--muted); margin-bottom: 0; }
.prose { columns: 2; column-gap: 36px; color: var(--muted); }
.prose p { break-inside: avoid; }
.feature-grid, .review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.info-card, .review-card, .zone-card, .card { background: #fff; border: 1px solid rgba(28,168,246,.12); box-shadow: 0 16px 40px rgba(8,119,201,.08); border-radius: 18px; }
.info-card { padding: 22px; background: linear-gradient(180deg, #fff, #f7fcff); }
.info-card p { color: var(--muted); margin-bottom: 0; }
.review-card { margin: 0; padding: 22px; background: var(--surface-pale); }
.review-card p { margin: 0; color: var(--ink); }
.faq-list { display: grid; gap: 12px; }
.faq-list details { border: 1px solid rgba(28,168,246,.14); border-radius: 15px; background: var(--surface-pale); padding: 0 18px; }
.faq-list summary { padding: 16px 32px 16px 0; font-weight: 700; color: var(--ink-strong); cursor: pointer; position: relative; }
.faq-list summary::after { content: "+"; position: absolute; right: 0; color: var(--primary); font-size: 22px; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { color: var(--muted); padding-bottom: 18px; margin-bottom: 0; }
.compliance-notice { margin: 28px 0 54px; display: grid; grid-template-columns: .7fr 1.3fr; gap: 28px; padding: 30px; border-radius: 22px; background: #082A46; color: #EAF8FF; }
.compliance-notice h2 { color: #fff; margin-bottom: 0; }
.compliance-notice p { margin: 0; color: rgba(234,248,255,.83); }

.home-intro { margin-bottom: 28px; }
.home-intro-actions { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-top: 24px; }
.home-intro .hero-visual img { max-height: 270px; }
.quick-channels { margin: 28px 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.quick-channel { padding: 18px; background: #fff; border: 1px solid rgba(28,168,246,.12); border-radius: 999px; box-shadow: 0 10px 24px rgba(8,119,201,.06); display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 8px 14px; }
.quick-channel strong { color: var(--primary-dark); }
.quick-channel small { color: var(--muted); grid-column: 1; }
.quick-channel a { color: var(--primary); font-weight: 750; grid-row: 1 / span 2; grid-column: 2; }
.platform-strip { padding: 24px 28px; margin: 28px 0; background: linear-gradient(90deg, #fff, #eaf7ff); border-radius: 20px; border: 1px solid rgba(28,168,246,.12); }
.platform-strip p { margin: 0; color: var(--muted); }
.dashboard-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin: 28px 0; }
.dashboard-grid .info-card .num { display: inline-flex; margin-bottom: 12px; color: var(--primary); font-weight: 850; }
.split-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; margin: 28px 0; }
.triple-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin: 28px 0; }
.zone-card { overflow: hidden; }
.zone-card figure { margin: 0; padding: 16px; height: 210px; background: var(--surface-pale); display: grid; place-items: center; }
.zone-card img { width: 100%; height: 100%; object-fit: contain; }
.zone-card-body { padding: 22px; }
.zone-card-body p { color: var(--muted); }
.text-panel { padding: 28px; background: #fff; border: 1px solid rgba(28,168,246,.12); border-radius: 22px; box-shadow: var(--shadow); }
.text-panel p { color: var(--muted); }
.service-points { display: grid; gap: 10px; padding: 0; margin: 16px 0; list-style: none; }
.service-points li { position: relative; padding-left: 22px; color: var(--muted); }
.service-points li::before { content: ""; position: absolute; left: 0; top: .75em; width: 8px; height: 8px; border-radius: 50%; background: var(--primary-bright); }

.floating-service { position: fixed; right: 18px; top: 42%; z-index: 60; display: grid; gap: 8px; width: 92px; }
.floating-service a, .floating-service button { display: grid; place-items: center; min-height: 42px; padding: 8px; background: #fff; color: var(--primary-dark); border: 1px solid rgba(28,168,246,.14); border-radius: 12px; box-shadow: 0 14px 30px rgba(8,119,201,.10); font-size: 13px; }
.floating-service .register-link { background: linear-gradient(135deg, #38C7FF 0%, #1CA8F6 48%, #0877C9 100%); color: #fff; }

.site-footer { background: var(--footer); color: #EAF8FF; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 38px; padding: 52px 0 34px; }
.footer-brand img { width: 150px; max-height: 48px; object-fit: contain; margin-bottom: 18px; filter: brightness(0) invert(1); }
.footer-brand p { color: rgba(234,248,255,.72); }
.footer-grid nav { display: grid; align-content: start; gap: 9px; }
.footer-grid h2 { color: #fff; font-size: 17px; margin-bottom: 7px; }
.footer-grid a { color: rgba(234,248,255,.72); font-size: 14px; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding: 18px 0 30px; border-top: 1px solid rgba(234,248,255,.12); color: rgba(234,248,255,.62); font-size: 13px; }
.footer-bottom p { margin: 0; }
.mobile-bottom-nav { display: none; }

@media (max-width: 1080px) {
  .header-main { grid-template-columns: 160px 1fr auto; gap: 16px; }
  .nav-core { gap: 18px; }
  .floating-service { display: none; }
  .feature-grid, .review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dashboard-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .quick-channels { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  :root { --header-height: 70px; }
  body { padding-top: var(--header-height); padding-bottom: calc(74px + env(safe-area-inset-bottom)); }
  .shell, .page-main, .breadcrumb, .banner-slider { width: min(100% - 24px, 1200px); }
  .site-header { height: 70px; }
  .header-main { height: 70px; grid-template-columns: 44px 1fr auto; gap: 10px; }
  .menu-toggle { display: block; }
  .brand-logo { justify-self: center; width: 118px; height: 40px; }
  .brand-logo img { max-width: 118px; max-height: 40px; }
  .nav-core, .channel-bar { display: none; }
  .header-register { padding: 8px 16px; min-height: 38px; font-size: 14px; }
  .banner-slider { height: clamp(160px, 50vw, 220px); margin-top: 16px; margin-bottom: 22px; border-radius: 16px; }
  .slider-arrow { width: 36px; height: 36px; font-size: 22px; }
  .slider-arrow.prev { left: 8px; }
  .slider-arrow.next { right: 8px; }
  .slider-dots { bottom: 9px; }
  .breadcrumb { margin-top: 16px; }
  .inner-hero, .home-intro { grid-template-columns: 1fr; gap: 24px; padding: 24px; border-radius: 22px; }
  .inner-hero-copy > p, .home-intro-copy > p { font-size: 15px; }
  .hero-visual { min-height: 180px; padding: 12px; }
  .hero-visual img { max-height: 230px; }
  .section-stack { gap: 16px; margin-top: 20px; }
  .content-section { margin-top: 20px; padding: 22px 18px; border-radius: 18px; }
  .section-heading { grid-template-columns: 44px 1fr; gap: 12px; }
  .section-heading .num { width: 44px; height: 44px; border-radius: 13px; font-size: 13px; }
  .prose { columns: 1; }
  .feature-grid, .review-grid, .dashboard-grid, .split-grid, .triple-grid, .quick-channels { grid-template-columns: 1fr; }
  .quick-channel { border-radius: 18px; }
  .zone-card figure { height: 180px; }
  .compliance-notice { grid-template-columns: 1fr; padding: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px 20px; padding-top: 38px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; padding-bottom: 26px; }
  .mobile-bottom-nav { position: fixed; inset: auto 0 0; z-index: 90; height: calc(66px + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom); display: grid; grid-template-columns: repeat(4, 1fr); background: rgba(255,255,255,.97); backdrop-filter: blur(12px); border-top: 1px solid rgba(28,168,246,.15); box-shadow: 0 -8px 24px rgba(8,119,201,.09); }
  .mobile-bottom-nav a { display: grid; place-items: center; align-content: center; gap: 2px; color: var(--muted); font-size: 12px; }
  .mobile-bottom-nav span { min-width: 26px; height: 24px; display: grid; place-items: center; color: var(--primary); font-size: 12px; font-weight: 800; }
  .mobile-bottom-nav a.active { color: var(--primary-dark); font-weight: 700; }
}

@media (max-width: 430px) {
  h1 { font-size: 31px; }
  h2 { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .drawer-nav { grid-template-columns: 1fr; }
}