:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #E8F7FF;
    --primary: #11AEEA;
    --primary-strong: #1688D8;
    --title: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(17, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --gradient: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    --shadow: 0 18px 48px rgba(22, 136, 216, 0.12);
    --shadow-soft: 0 10px 30px rgba(21, 90, 157, 0.08);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --container: min(100% - 32px, 1360px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
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; }

.skip-link {
    position: fixed;
    left: 16px;
    top: -60px;
    z-index: 9999;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--footer);
    color: #fff;
    transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    height: 76px;
    background: rgba(255,255,255,.96);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 26px rgba(21, 90, 157, 0.06);
    backdrop-filter: blur(14px);
}
.header-inner {
    width: var(--container);
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: clamp(14px, 2vw, 28px);
}
.brand-logo { flex: 0 0 auto; display: inline-flex; align-items: center; }
.brand-logo img { width: clamp(118px, 9vw, 156px); max-height: 48px; object-fit: contain; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(8px, 1.1vw, 18px);
    overflow: hidden;
}
.desktop-nav a {
    flex: 0 0 auto;
    white-space: nowrap;
    color: var(--text);
    font-size: clamp(13px, .94vw, 15px);
    font-weight: 600;
    line-height: 1;
    padding: 12px 0;
    position: relative;
    transition: color .2s ease;
}
.desktop-nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 5px;
    width: 0;
    height: 2px;
    border-radius: 99px;
    background: var(--gradient);
    transform: translateX(-50%);
    transition: width .2s ease;
}
.desktop-nav a:hover,
.desktop-nav a.active { color: var(--primary-strong); }
.desktop-nav a:hover::after,
.desktop-nav a.active::after { width: 100%; }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 24px;
    border: 0;
    border-radius: 999px;
    color: #fff;
    background: var(--gradient);
    font-weight: 700;
    white-space: nowrap;
    box-shadow: 0 10px 24px rgba(22, 136, 216, 0.22);
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(22, 136, 216, 0.28); }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #fff;
}
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 99px; background: var(--title); }

.mobile-drawer {
    position: fixed;
    z-index: 1200;
    top: 0;
    right: 0;
    width: min(88vw, 380px);
    height: 100dvh;
    padding: 20px;
    overflow-y: auto;
    background: #fff;
    box-shadow: -18px 0 50px rgba(7,58,104,.18);
    transform: translateX(105%);
    transition: transform .24s ease;
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-overlay {
    position: fixed;
    z-index: 1100;
    inset: 0;
    background: rgba(7,58,104,.42);
    opacity: 0;
    transition: opacity .22s ease;
}
.drawer-overlay.show { opacity: 1; }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.drawer-brand { font-size: 25px; font-weight: 800; color: var(--primary-strong); letter-spacing: .12em; }
.drawer-close { width: 42px; height: 42px; border: 1px solid var(--border); border-radius: 13px; background: var(--surface-soft); color: var(--title); font-size: 28px; line-height: 1; }
.drawer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 20px 0; }
.drawer-nav a { padding: 12px 14px; border: 1px solid var(--border); border-radius: 13px; color: var(--text); background: #fff; font-weight: 600; }
.drawer-nav a.active { color: var(--primary-strong); background: var(--surface-soft); }
.drawer-register { width: 100%; }
.drawer-note { margin: 16px 0 0; color: var(--muted); font-size: 13px; }

main { padding-top: 76px; }
.site-section { padding: clamp(58px, 7vw, 96px) 0; }
.site-section.compact { padding: clamp(42px, 5vw, 68px) 0; }
.section-soft { background: var(--surface-soft); }
.section-white { background: #fff; }
.container { width: var(--container); margin: 0 auto; }
.section-head { max-width: 820px; margin-bottom: 32px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow { display: inline-block; margin-bottom: 10px; color: var(--primary-strong); font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3 { margin: 0; color: var(--title); line-height: 1.28; }
h1 { font-size: clamp(34px, 5vw, 64px); letter-spacing: -.02em; }
h2 { font-size: clamp(28px, 3.6vw, 44px); }
h3 { font-size: clamp(19px, 2vw, 24px); }
p { margin: 0; }
.section-head p,
.hero-copy p { margin-top: 16px; color: var(--muted); font-size: clamp(15px, 1.4vw, 18px); }

.page-hero { padding: clamp(64px, 8vw, 112px) 0; position: relative; overflow: hidden; }
.page-hero::before,
.page-hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(8px); pointer-events: none; }
.page-hero::before { width: 320px; height: 320px; right: -80px; top: -100px; background: rgba(53,215,255,.20); }
.page-hero::after { width: 220px; height: 220px; left: -70px; bottom: -110px; background: rgba(22,136,216,.12); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(320px, .94fr); gap: clamp(28px, 5vw, 72px); align-items: center; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.text-link { color: var(--primary-strong); font-weight: 800; }
.text-link:hover { text-decoration: underline; }
.secondary-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 22px; border: 1px solid var(--border); border-radius: 999px; background: #fff; color: var(--title); font-weight: 700; }
.hero-image,
.content-image { border-radius: var(--radius-xl); overflow: hidden; background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow); }
.hero-image img,
.content-image img { width: 100%; height: 100%; object-fit: contain; }
.hero-image { aspect-ratio: 16 / 10; padding: clamp(12px, 2vw, 22px); }
.content-image { aspect-ratio: 16 / 10; padding: 14px; }

.carousel-wrap { padding: 24px 0 0; }
.carousel {
    width: var(--container);
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: clamp(18px, 3vw, 30px);
    background: #fff;
    box-shadow: var(--shadow);
}
.carousel-track { display: flex; transition: transform .55s cubic-bezier(.22,.7,.2,1); }
.carousel-slide { min-width: 100%; aspect-ratio: 16 / 5.6; display: grid; place-items: center; background: var(--surface-soft); }
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; }
.carousel-arrow {
    position: absolute;
    top: 50%;
    z-index: 4;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(255,255,255,.78);
    border-radius: 50%;
    background: rgba(7,58,104,.52);
    color: #fff;
    font-size: 28px;
    line-height: 1;
    transform: translateY(-50%);
    backdrop-filter: blur(8px);
}
.carousel-arrow.prev { left: 18px; }
.carousel-arrow.next { right: 18px; }
.carousel-dots { position: absolute; z-index: 4; left: 50%; bottom: 16px; display: flex; gap: 8px; transform: translateX(-50%); }
.carousel-dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.72); box-shadow: 0 0 0 1px rgba(7,58,104,.12); }
.carousel-dot.active { width: 28px; border-radius: 99px; background: var(--primary); }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.card-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.info-card,
.feature-card,
.quote-card,
.step-card,
.notice-card,
.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: #fff;
    box-shadow: var(--shadow-soft);
}
.info-card,
.feature-card,
.step-card,
.notice-card { padding: clamp(22px, 3vw, 32px); }
.info-card p,
.feature-card p,
.step-card p,
.notice-card p { margin-top: 12px; color: var(--muted); }
.card-index { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; margin-bottom: 16px; border-radius: 13px; color: #fff; background: var(--gradient); font-weight: 800; }
.card-link { display: inline-flex; margin-top: 18px; color: var(--primary-strong); font-weight: 800; }
.card-link:hover { text-decoration: underline; }

.split-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .9fr); gap: clamp(28px, 5vw, 68px); align-items: center; }
.split-grid.reverse .content-image { order: -1; }
.list-check { display: grid; gap: 13px; margin: 24px 0 0; padding: 0; list-style: none; }
.list-check li { position: relative; padding-left: 30px; color: var(--text); }
.list-check li::before { content: ""; position: absolute; left: 0; top: .6em; width: 14px; height: 14px; border-radius: 50%; background: var(--gradient); box-shadow: 0 0 0 5px rgba(17,174,234,.10); }

.category-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; }
.category-card { padding: 22px; border: 1px solid var(--border); border-radius: 18px; background: #fff; box-shadow: var(--shadow-soft); }
.category-card p { margin-top: 10px; color: var(--muted); font-size: 14px; }
.category-card a { display: inline-flex; margin-top: 14px; color: var(--primary-strong); font-weight: 800; }

.media-cards { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.media-card { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-soft); }
.media-card .media { aspect-ratio: 16 / 10; padding: 12px; background: var(--surface-soft); }
.media-card .media img { width: 100%; height: 100%; object-fit: contain; }
.media-card .body { padding: 22px; }
.media-card .body p { margin-top: 10px; color: var(--muted); }

.steps { counter-reset: step; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.step-card { counter-increment: step; }
.step-card::before { content: counter(step, decimal-leading-zero); display: block; margin-bottom: 16px; color: var(--primary); font-size: 26px; font-weight: 900; }

.quote-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.quote-grid.five { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.quote-card { padding: 24px; }
.quote-card blockquote { margin: 0; color: var(--text); }
.quote-card footer { margin-top: 16px; color: var(--primary-strong); font-weight: 800; }

.notice-strip { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.notice-card strong { display: block; color: var(--title); font-size: 18px; }
.notice-card p { font-size: 14px; }

.faq-list { display: grid; gap: 14px; }
.faq-item { overflow: hidden; }
.faq-item summary { padding: 20px 24px; cursor: pointer; color: var(--title); font-weight: 800; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; float: right; color: var(--primary-strong); font-size: 24px; line-height: 1; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding: 0 24px 22px; color: var(--muted); }

.compliance-box { display: grid; grid-template-columns: 1.1fr .9fr; gap: 22px; padding: clamp(28px, 4vw, 44px); border: 1px solid var(--border); border-radius: var(--radius-xl); background: linear-gradient(135deg, #fff 0%, #eaf9ff 100%); box-shadow: var(--shadow-soft); }
.compliance-box p { margin-top: 12px; color: var(--muted); }
.compliance-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.compliance-list li { padding: 12px 14px; border-radius: 14px; background: rgba(255,255,255,.86); color: var(--title); font-weight: 700; }

.cta-band { padding: clamp(34px, 5vw, 56px); border-radius: var(--radius-xl); background: var(--footer); color: var(--footer-text); box-shadow: var(--shadow); }
.cta-band h2 { color: #fff; }
.cta-band p { max-width: 760px; margin-top: 14px; color: rgba(234,248,255,.82); }
.cta-band .main-btn { margin-top: 22px; }

.site-footer { background: var(--footer); color: var(--footer-text); }
.footer-inner { width: var(--container); margin: 0 auto; padding: 58px 0 36px; display: grid; grid-template-columns: .9fr 1.5fr; gap: 60px; }
.footer-brand strong { display: inline-block; font-size: 30px; letter-spacing: .12em; }
.footer-brand p { max-width: 460px; margin-top: 14px; color: rgba(234,248,255,.72); }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.footer-links h2 { margin-bottom: 12px; color: #fff; font-size: 17px; }
.footer-links a { display: block; padding: 4px 0; color: rgba(234,248,255,.74); }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(234,248,255,.14); padding: 20px 16px 28px; text-align: center; color: rgba(234,248,255,.68); font-size: 13px; }
.footer-bottom p + p { margin-top: 4px; }

@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .header-inner { justify-content: space-between; }
    .menu-toggle { display: block; }
    .quote-grid.five { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .category-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .media-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
    .hero-grid,
    .split-grid,
    .compliance-box,
    .footer-inner { grid-template-columns: 1fr; }
    .split-grid.reverse .content-image { order: 0; }
    .hero-image { max-width: 720px; width: 100%; }
    .card-grid,
    .card-grid.four,
    .quote-grid,
    .quote-grid.five,
    .steps,
    .notice-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-inner { gap: 36px; }
}

@media (max-width: 640px) {
    :root { --container: min(100% - 24px, 1360px); }
    .site-header { height: 68px; }
    main { padding-top: 68px; }
    .brand-logo img { width: 112px; }
    .header-actions .main-btn { min-height: 40px; padding: 0 17px; font-size: 14px; }
    .menu-toggle { width: 40px; height: 40px; border-radius: 12px; }
    .carousel-wrap { padding-top: 14px; }
    .carousel-slide { aspect-ratio: 16 / 9; }
    .carousel-arrow { width: 38px; height: 38px; font-size: 23px; }
    .carousel-arrow.prev { left: 10px; }
    .carousel-arrow.next { right: 10px; }
    .carousel-dots { bottom: 10px; }
    .category-grid,
    .card-grid,
    .card-grid.two,
    .card-grid.four,
    .media-cards,
    .quote-grid,
    .quote-grid.five,
    .steps,
    .notice-strip,
    .footer-links { grid-template-columns: 1fr; }
    .drawer-nav { grid-template-columns: 1fr 1fr; }
    .site-section { padding: 52px 0; }
    .page-hero { padding: 58px 0; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions a { width: 100%; }
}

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