:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --primary: #10AEEA;
    --primary-dark: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --footer: #073A68;
    --line: #D4EAF6;
    --shadow: 0 18px 48px rgba(22, 96, 148, .12);
    --shadow-soft: 0 10px 28px rgba(22, 96, 148, .08);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --gradient: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    color: var(--text);
    background: var(--bg);
    font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.72;
    text-rendering: optimizeLegibility;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; left: 14px; top: -80px; z-index: 9999; padding: 10px 16px; color: #fff; background: var(--footer); border-radius: 10px; }
.skip-link:focus { top: 14px; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(212, 234, 246, .9);
    background: rgba(255, 255, 255, .95);
    backdrop-filter: blur(16px);
}
.header-inner { min-height: 76px; display: flex; align-items: center; gap: 22px; }
.brand-logo { flex: 0 0 auto; width: 142px; }
.brand-logo img { width: 100%; height: 46px; object-fit: contain; }
.desktop-nav { flex: 1 1 auto; min-width: 0; display: flex; align-items: center; justify-content: center; gap: clamp(10px, 1.2vw, 22px); white-space: nowrap; }
.desktop-nav a { position: relative; padding: 26px 0 24px; color: #31516b; font-size: 14px; font-weight: 700; }
.desktop-nav a::after { content: ""; position: absolute; left: 50%; bottom: 17px; width: 0; height: 3px; border-radius: 999px; background: var(--gradient); transform: translateX(-50%); transition: width .2s ease; }
.desktop-nav a:hover, .desktop-nav a.is-active { color: var(--primary-dark); }
.desktop-nav a:hover::after, .desktop-nav a.is-active::after { width: 26px; }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.main-btn, .secondary-btn {
    display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 22px; border: 0; border-radius: 999px; font-weight: 800; transition: transform .2s ease, box-shadow .2s ease, opacity .2s ease;
}
.main-btn { color: #fff; background: var(--gradient); box-shadow: 0 10px 24px rgba(16, 174, 234, .26); }
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(16, 174, 234, .32); }
.secondary-btn { color: var(--primary-dark); background: var(--soft); border: 1px solid #bfe6f8; }
.secondary-btn:hover { transform: translateY(-2px); }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.menu-toggle span { display: block; width: 100%; height: 2px; margin: 5px 0; border-radius: 3px; background: var(--primary-dark); }
.drawer-backdrop { position: fixed; inset: 0; z-index: 1190; opacity: 0; background: rgba(7, 58, 104, .48); transition: opacity .22s ease; }
.drawer-backdrop.is-visible { opacity: 1; }
.mobile-drawer { position: fixed; top: 0; right: 0; z-index: 1200; width: min(86vw, 360px); height: 100dvh; padding: 22px; overflow-y: auto; background: #fff; box-shadow: -18px 0 50px rgba(7, 58, 104, .22); transform: translateX(105%); transition: transform .25s ease; }
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 15px; border-bottom: 1px solid var(--line); }
.drawer-head strong { color: var(--primary-dark); font-size: 22px; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 12px; color: var(--primary-dark); background: var(--soft); font-size: 26px; line-height: 1; }
.mobile-drawer nav { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 18px 0; }
.mobile-drawer nav a { padding: 11px 12px; border-radius: 12px; color: #31516b; background: #f8fcff; font-size: 14px; font-weight: 700; }
.mobile-drawer nav a:hover { color: var(--primary-dark); background: var(--soft); }
.drawer-register { width: 100%; }

.section { padding: 72px 0; }
.section-tight { padding: 46px 0; }
.section-soft { background: var(--soft); }
.section-white { background: #fff; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 30px; }
.section-head > div { max-width: 760px; }
.section-kicker, .eyebrow { display: inline-block; margin-bottom: 10px; color: var(--primary); font-size: 13px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: var(--primary-dark); line-height: 1.28; }
h1 { margin-bottom: 18px; font-size: clamp(32px, 5vw, 58px); letter-spacing: -.04em; }
h2 { margin-bottom: 14px; font-size: clamp(26px, 3.4vw, 40px); letter-spacing: -.025em; }
h3 { margin-bottom: 10px; font-size: 20px; }
p { margin-bottom: 16px; }
.lead { color: #42637d; font-size: clamp(17px, 2vw, 20px); }
.text-link { display: inline-flex; align-items: center; gap: 7px; color: var(--primary-dark); font-weight: 800; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }

.carousel-shell { position: relative; width: 100%; overflow: hidden; background: #dff4ff; }
.carousel { position: relative; width: 100%; aspect-ratio: 1920 / 680; min-height: 310px; max-height: 680px; }
.carousel-slide { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .5s ease; }
.carousel-slide.is-active { opacity: 1; pointer-events: auto; }
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.carousel-control { position: absolute; top: 50%; z-index: 3; display: grid; place-items: center; width: 48px; height: 48px; border: 1px solid rgba(255,255,255,.6); border-radius: 50%; color: #fff; background: rgba(7,58,104,.42); transform: translateY(-50%); box-shadow: 0 8px 20px rgba(7,58,104,.2); }
.carousel-control:hover { background: rgba(7,58,104,.7); }
.carousel-prev { left: max(16px, calc((100vw - 1180px) / 2)); }
.carousel-next { right: max(16px, calc((100vw - 1180px) / 2)); }
.carousel-dots { position: absolute; left: 50%; bottom: 18px; z-index: 3; display: flex; gap: 9px; transform: translateX(-50%); }
.carousel-dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 99px; background: rgba(255,255,255,.62); transition: width .2s ease, background .2s ease; }
.carousel-dot.is-active { width: 30px; background: #fff; }

.intro-band { margin-top: -1px; padding: 52px 0 58px; background: linear-gradient(180deg, #fff 0%, var(--bg) 100%); }
.intro-card { display: grid; grid-template-columns: 1.3fr .7fr; gap: 42px; align-items: center; padding: 38px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.intro-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px; }

.category-scroll { display: flex; gap: 12px; padding: 6px 0 14px; overflow-x: auto; scrollbar-width: thin; scroll-snap-type: x proximity; }
.category-pill { flex: 0 0 210px; scroll-snap-align: start; padding: 18px; border: 1px solid var(--line); border-radius: 999px; background: #fff; box-shadow: var(--shadow-soft); }
.category-pill strong { display: block; margin-bottom: 4px; color: var(--primary-dark); }
.category-pill span { display: block; color: var(--muted); font-size: 13px; line-height: 1.55; }
.category-pill a { display: inline-block; margin-top: 8px; color: var(--primary); font-size: 13px; font-weight: 800; }

.dashboard-grid, .cards-grid, .reviews-grid, .faq-grid, .tri-grid { display: grid; gap: 20px; }
.dashboard-grid { grid-template-columns: repeat(4, 1fr); }
.dashboard-card, .info-card, .review-card, .faq-card, .mini-card { padding: 25px; border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-soft); }
.dashboard-card .number { display: inline-flex; width: 38px; height: 38px; align-items: center; justify-content: center; margin-bottom: 16px; border-radius: 12px; color: #fff; background: var(--gradient); font-weight: 900; }
.dashboard-card p, .info-card p, .mini-card p { color: var(--muted); }

.feature-panel { display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 46px; padding: 38px; border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.feature-panel.reverse { grid-template-columns: .9fr 1.1fr; }
.feature-panel.reverse .feature-media { order: 2; }
.feature-media { overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: var(--soft); }
.feature-media img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; }
.feature-copy ul, .content-list { margin: 18px 0 24px; padding: 0; list-style: none; }
.feature-copy li, .content-list li { position: relative; margin: 10px 0; padding-left: 22px; color: #42637d; }
.feature-copy li::before, .content-list li::before { content: ""; position: absolute; left: 0; top: .72em; width: 8px; height: 8px; border-radius: 50%; background: var(--gradient); }

.split-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.split-card { display: grid; grid-template-columns: .9fr 1.1fr; min-height: 340px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-soft); }
.split-card:nth-child(even) { grid-template-columns: 1.1fr .9fr; }
.split-card:nth-child(even) .split-media { order: 2; }
.split-media { background: var(--soft); }
.split-media img { width: 100%; height: 100%; object-fit: contain; }
.split-copy { padding: 30px; }

.tri-grid { grid-template-columns: repeat(3, 1fr); }
.mini-card { overflow: hidden; padding: 0; }
.mini-card img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; background: var(--soft); }
.mini-card > div { padding: 24px; }

.app-banner { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: center; overflow: hidden; padding: 44px; border-radius: var(--radius-lg); color: #fff; background: linear-gradient(135deg, #0d91d8 0%, #0b5c9b 100%); box-shadow: var(--shadow); }
.app-banner h2, .app-banner h3 { color: #fff; }
.app-banner p { color: #dff6ff; }
.app-banner .main-btn { color: var(--primary-dark); background: #fff; }
.app-banner img { width: 100%; max-height: 320px; object-fit: contain; }

.notice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.notice-card { padding: 28px; border-radius: var(--radius-md); background: #fff; border: 1px solid var(--line); }
.notice-card strong { display: block; margin-bottom: 8px; color: var(--primary-dark); font-size: 18px; }
.notice-card.warning { background: #fffdf5; border-color: #f2df9b; }

.reviews-grid { grid-template-columns: repeat(3, 1fr); }
.review-card { min-height: 220px; }
.review-head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.review-avatar { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; color: #fff; background: var(--gradient); font-weight: 900; }
.review-head strong, .review-head span { display: block; }
.review-head span { color: var(--muted); font-size: 13px; }
.review-card p { color: #47647b; }

.faq-list { display: grid; gap: 12px; }
.faq-list details { border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: var(--shadow-soft); }
.faq-list summary { position: relative; padding: 20px 54px 20px 22px; color: var(--primary-dark); font-weight: 850; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 22px; top: 50%; color: var(--primary); font-size: 24px; transform: translateY(-50%); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { padding: 0 22px 22px; color: #4c687f; }

.page-hero { padding: 76px 0 54px; background: radial-gradient(circle at 85% 15%, rgba(53,215,255,.22), transparent 32%), linear-gradient(180deg, #fff 0%, var(--bg) 100%); }
.page-hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 48px; align-items: center; }
.page-hero-copy { max-width: 720px; }
.page-hero-media { padding: 18px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.page-hero-media img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.breadcrumbs a { color: var(--primary-dark); }

.content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 28px; align-items: start; }
.content-main { display: grid; gap: 22px; }
.content-block { padding: 30px; border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-soft); }
.content-block h2 { font-size: clamp(24px, 3vw, 34px); }
.content-block p { color: #42637d; }
.content-block img { width: 100%; max-height: 480px; margin: 22px 0; object-fit: contain; border-radius: 18px; background: var(--soft); }
.sidebar { position: sticky; top: 96px; display: grid; gap: 18px; }
.sidebar-card { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-soft); }
.sidebar-card a { display: block; padding: 9px 0; border-bottom: 1px dashed var(--line); color: #31516b; font-weight: 700; }
.sidebar-card a:last-child { border-bottom: 0; }
.sidebar-card .main-btn { display: flex; margin-top: 14px; border-bottom: 0; color: #fff; }
.product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.product-card { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.product-card img { width: 100%; aspect-ratio: 16 / 10; margin: 0; border-radius: 0; object-fit: contain; background: var(--soft); }
.product-card > div { padding: 20px; }
.product-card p { margin-bottom: 0; }
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 24px; }
.stat-box { padding: 18px; border-radius: 16px; background: var(--soft); }
.stat-box strong { display: block; color: var(--primary-dark); }
.stat-box span { color: var(--muted); font-size: 14px; }

.compliance-section { padding-top: 30px; }
.compliance-panel { display: grid; grid-template-columns: .85fr 1.15fr; gap: 42px; padding: 38px; border: 1px solid #bfe6f8; border-radius: var(--radius-lg); background: linear-gradient(135deg, #ffffff 0%, #e9f8ff 100%); }
.compliance-copy p { color: #42637d; }

.contact-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.contact-option { padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.process-list { counter-reset: process; display: grid; gap: 14px; padding: 0; list-style: none; }
.process-list li { counter-increment: process; position: relative; padding: 18px 18px 18px 62px; border-radius: 16px; background: var(--soft); }
.process-list li::before { content: counter(process); position: absolute; left: 18px; top: 15px; display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; color: #fff; background: var(--gradient); font-weight: 900; }

.site-footer { margin-top: 72px; padding: 54px 0 20px; color: #EAF8FF; background: var(--footer); }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 36px; }
.footer-brand img { width: 150px; height: 46px; margin-bottom: 18px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 430px; color: #c9e9fa; }
.site-footer h2 { margin-bottom: 16px; color: #fff; font-size: 17px; }
.site-footer a { display: block; margin: 9px 0; color: #c9e9fa; }
.site-footer a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; margin-top: 38px; padding-top: 20px; border-top: 1px solid rgba(234,248,255,.16); color: #b8dff2; font-size: 13px; }
.footer-bottom p { margin: 0; }

.registration-page { min-height: 100vh; display: grid; place-items: center; padding: 30px; background: radial-gradient(circle at top right, rgba(53,215,255,.28), transparent 35%), var(--bg); }
.registration-card { width: min(720px, 100%); padding: 42px; border: 1px solid var(--line); border-radius: 30px; background: #fff; box-shadow: var(--shadow); text-align: center; }
.registration-card .text-logo { margin-bottom: 18px; color: var(--primary-dark); font-size: 26px; font-weight: 900; }
.registration-card h1 { font-size: clamp(30px, 6vw, 48px); }
.registration-card p { color: #4b687f; }
.registration-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 26px; }

@media (max-width: 1179px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: block; }
    .header-inner { min-height: 70px; }
    .brand-logo { width: 132px; }
}

@media (max-width: 920px) {
    .section { padding: 56px 0; }
    .intro-card, .feature-panel, .feature-panel.reverse, .app-banner, .page-hero-grid, .compliance-panel { grid-template-columns: 1fr; }
    .feature-panel.reverse .feature-media { order: 0; }
    .intro-actions { justify-content: flex-start; }
    .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
    .split-grid, .notice-grid { grid-template-columns: 1fr; }
    .tri-grid, .reviews-grid, .contact-options { grid-template-columns: repeat(2, 1fr); }
    .content-layout { grid-template-columns: 1fr; }
    .sidebar { position: static; grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
    .footer-grid > div:last-child { grid-column: 2 / 4; }
}

@media (max-width: 680px) {
    .container { width: min(100% - 28px, 1180px); }
    .header-inner { gap: 10px; }
    .brand-logo { width: 112px; }
    .brand-logo img { height: 40px; }
    .main-btn, .secondary-btn { min-height: 42px; padding: 0 17px; }
    .header-actions .main-btn { padding: 0 16px; }
    .carousel { aspect-ratio: 16 / 8.5; min-height: 210px; }
    .carousel-control { width: 40px; height: 40px; }
    .carousel-prev { left: 10px; }
    .carousel-next { right: 10px; }
    .intro-card, .feature-panel, .app-banner, .content-block, .compliance-panel { padding: 24px; }
    .section-head { align-items: start; flex-direction: column; }
    .dashboard-grid, .tri-grid, .reviews-grid, .contact-options, .product-grid, .stats-row { grid-template-columns: 1fr; }
    .split-card, .split-card:nth-child(even) { grid-template-columns: 1fr; }
    .split-card:nth-child(even) .split-media { order: 0; }
    .split-media img { aspect-ratio: 16 / 10; }
    .page-hero { padding: 54px 0 38px; }
    .sidebar { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-grid > div:last-child { grid-column: auto; }
    .footer-bottom { flex-direction: column; }
    .registration-card { padding: 28px 22px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}