:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #E8F7FF;
    --primary: #10AEEA;
    --primary-deep: #1688D8;
    --heading: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(16,174,234,.18);
    --shadow: 0 16px 42px rgba(22,136,216,.12);
    --shadow-sm: 0 8px 24px rgba(22,136,216,.10);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --container: min(100% - 32px, 1240px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    color: var(--text);
    background:
        radial-gradient(circle at 8% 3%, rgba(53,215,255,.15), transparent 26rem),
        linear-gradient(180deg, #F8FDFF 0%, var(--bg) 100%);
    font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.75;
}
body.drawer-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
.skip-link {
    position: fixed;
    left: 16px;
    top: -60px;
    z-index: 2000;
    padding: 10px 16px;
    border-radius: 10px;
    background: #073A68;
    color: #fff;
    transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    height: 76px;
    background: rgba(255,255,255,.94);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 30px rgba(7,58,104,.06);
    backdrop-filter: blur(16px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    height: 100%;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: clamp(12px, 1.4vw, 26px);
}
.brand-logo, .drawer-logo { flex: 0 0 auto; }
.brand-logo img { width: clamp(104px, 10vw, 144px); max-height: 48px; object-fit: contain; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(5px, .72vw, 12px);
    overflow: hidden;
}
.desktop-nav a {
    position: relative;
    flex: 0 0 auto;
    white-space: nowrap;
    padding: 9px clamp(5px, .65vw, 10px);
    border-radius: 10px;
    color: #31566F;
    font-size: clamp(12px, .84vw, 14px);
    font-weight: 600;
    transition: color .2s ease, background .2s ease, transform .2s ease;
}
.desktop-nav a:hover, .desktop-nav a.active {
    color: var(--primary-deep);
    background: var(--surface-soft);
}
.header-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.main-btn, .secondary-btn, .text-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 0;
    cursor: pointer;
    font-weight: 700;
    transition: transform .2s ease, box-shadow .2s ease, opacity .2s ease;
}
.main-btn {
    min-width: 78px;
    padding: 11px 20px;
    border-radius: 999px;
    color: #fff;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    box-shadow: 0 10px 24px rgba(22,136,216,.24);
    white-space: nowrap;
}
.main-btn:hover, .secondary-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(22,136,216,.27); }
.secondary-btn {
    padding: 10px 18px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--primary-deep);
    background: #fff;
}
.text-link { color: var(--primary-deep); justify-content: flex-start; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 13px;
    background: #fff;
}
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 2px; background: var(--heading); }
.site-main { padding-top: 76px; }

.drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1090;
    opacity: 0;
    background: rgba(7,58,104,.42);
    transition: opacity .22s ease;
}
.drawer-backdrop.show { opacity: 1; }
.mobile-drawer {
    position: fixed;
    inset: 0 0 0 auto;
    z-index: 1100;
    width: min(88vw, 380px);
    padding: 18px;
    overflow-y: auto;
    transform: translateX(105%);
    background: #fff;
    box-shadow: -20px 0 50px rgba(7,58,104,.18);
    transition: transform .25s ease;
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.drawer-logo img { width: 124px; max-height: 48px; object-fit: contain; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 12px; color: var(--heading); background: var(--surface-soft); font-size: 28px; line-height: 1; }
.drawer-nav { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 9px; padding: 18px 0; }
.drawer-nav a { padding: 11px 12px; border: 1px solid var(--border); border-radius: 12px; color: #31566F; background: #fff; font-size: 14px; font-weight: 600; }
.drawer-nav a.active { color: var(--primary-deep); background: var(--surface-soft); }
.drawer-register { width: 100%; }

.container { width: var(--container); margin-inline: auto; }
.section { padding: clamp(52px, 7vw, 92px) 0; }
.section-tight { padding: clamp(36px, 5vw, 64px) 0; }
.section-soft { background: linear-gradient(180deg, rgba(232,247,255,.78), rgba(244,251,255,.3)); border-block: 1px solid rgba(16,174,234,.08); }
.section-heading { max-width: 760px; margin-bottom: 30px; }
.section-heading.center { margin-inline: auto; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 8px; color: var(--primary-deep); font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 24px; height: 3px; border-radius: 99px; background: linear-gradient(90deg, #35D7FF, #1688D8); }
h1, h2, h3 { margin: 0 0 .55em; color: var(--heading); line-height: 1.28; }
h1 { font-size: clamp(34px, 5vw, 62px); letter-spacing: -.03em; }
h2 { font-size: clamp(27px, 3.2vw, 42px); }
h3 { font-size: clamp(19px, 2vw, 24px); }
p { margin: 0 0 1em; }
.lead { color: #355E79; font-size: clamp(17px, 1.7vw, 21px); line-height: 1.85; }
.muted { color: var(--muted); }

.hero-inner {
    padding: clamp(70px, 9vw, 120px) 0 clamp(48px, 7vw, 84px);
    background:
        radial-gradient(circle at 82% 15%, rgba(53,215,255,.18), transparent 25rem),
        linear-gradient(180deg, #F8FDFF 0%, #EDF9FF 100%);
    border-bottom: 1px solid rgba(16,174,234,.10);
}
.hero-grid { display: grid; grid-template-columns: minmax(0,1.1fr) minmax(280px,.9fr); align-items: center; gap: clamp(28px, 6vw, 76px); }
.hero-copy { max-width: 720px; }
.hero-copy .lead { margin-bottom: 26px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-visual { position: relative; min-height: 320px; display: grid; place-items: center; }
.hero-visual::before { content: ""; position: absolute; inset: 10% 0 0 12%; border-radius: 50%; background: radial-gradient(circle, rgba(53,215,255,.28), rgba(22,136,216,.05) 58%, transparent 70%); filter: blur(4px); }
.hero-visual img { position: relative; width: 100%; max-height: 420px; object-fit: contain; border-radius: var(--radius-lg); filter: drop-shadow(0 22px 36px rgba(22,136,216,.18)); }
.hero-panel { position: relative; z-index: 1; width: min(100%, 470px); padding: clamp(24px, 4vw, 38px); border: 1px solid rgba(255,255,255,.9); border-radius: var(--radius-lg); background: rgba(255,255,255,.82); box-shadow: var(--shadow); backdrop-filter: blur(12px); }
.hero-panel ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 13px; }
.hero-panel li { display: flex; align-items: flex-start; gap: 12px; color: #31566F; }
.hero-panel li::before { content: "✓"; flex: 0 0 24px; width: 24px; height: 24px; display: grid; place-items: center; margin-top: 2px; border-radius: 50%; color: #fff; background: linear-gradient(135deg, #35D7FF, #1688D8); font-size: 13px; }

.carousel-wrap { padding: clamp(18px, 3vw, 32px) 0 0; }
.carousel {
    position: relative;
    width: min(100% - 32px, 1360px);
    margin-inline: auto;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: clamp(18px, 3vw, 30px);
    background: var(--surface-soft);
    box-shadow: var(--shadow);
    aspect-ratio: 16 / 6.2;
    min-height: 230px;
}
.carousel-track { display: flex; height: 100%; transition: transform .55s cubic-bezier(.22,.61,.36,1); }
.carousel-slide { min-width: 100%; height: 100%; }
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; background: #EAF8FF; }
.carousel-control { position: absolute; top: 50%; z-index: 2; width: 46px; height: 46px; display: grid; place-items: center; transform: translateY(-50%); border: 1px solid rgba(255,255,255,.75); border-radius: 50%; color: #fff; background: rgba(7,58,104,.46); backdrop-filter: blur(8px); cursor: pointer; font-size: 24px; }
.carousel-control.prev { left: 18px; }
.carousel-control.next { right: 18px; }
.carousel-dots { position: absolute; z-index: 2; 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,.65); box-shadow: 0 2px 7px rgba(7,58,104,.15); cursor: pointer; }
.carousel-dot.active { width: 28px; border-radius: 99px; background: #fff; }

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.card {
    min-width: 0;
    padding: clamp(22px, 3vw, 30px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: rgba(255,255,255,.94);
    box-shadow: var(--shadow-sm);
}
.card p:last-child { margin-bottom: 0; }
.card-icon { width: 48px; height: 48px; display: grid; place-items: center; margin-bottom: 16px; border-radius: 15px; color: #fff; background: linear-gradient(135deg, #35D7FF, #1688D8); font-weight: 900; box-shadow: 0 10px 20px rgba(22,136,216,.19); }
.link-card { display: flex; flex-direction: column; }
.link-card .text-link { margin-top: auto; padding-top: 10px; }
.media-card { overflow: hidden; padding: 0; }
.media-card img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; background: #EEF9FF; }
.media-card-body { padding: clamp(20px, 3vw, 28px); }
.split { display: grid; grid-template-columns: minmax(0,1fr) minmax(320px,.85fr); align-items: center; gap: clamp(28px, 6vw, 72px); }
.split.reverse .split-copy { order: 2; }
.split.reverse .split-media { order: 1; }
.split-media img { width: 100%; max-height: 450px; object-fit: contain; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #EDF9FF; box-shadow: var(--shadow); }
.feature-list { display: grid; gap: 14px; margin: 22px 0 0; padding: 0; list-style: none; }
.feature-list li { position: relative; padding-left: 30px; color: #355E79; }
.feature-list li::before { content: ""; position: absolute; left: 0; top: .65em; width: 14px; height: 14px; border-radius: 5px; background: linear-gradient(135deg, #35D7FF, #1688D8); box-shadow: 0 5px 12px rgba(22,136,216,.22); }

.quick-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; }
.quick-item { min-height: 210px; padding: 22px; border: 1px solid var(--border); border-radius: 18px; background: #fff; box-shadow: 0 8px 24px rgba(22,136,216,.08); }
.quick-item h3 { font-size: 19px; }
.quick-item p { color: var(--muted); font-size: 14px; }

.stats-strip { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 14px; margin-top: 28px; }
.stat { padding: 20px; text-align: center; border: 1px solid var(--border); border-radius: 18px; background: rgba(255,255,255,.8); }
.stat strong { display: block; margin-bottom: 4px; color: var(--primary-deep); font-size: 21px; }
.stat span { color: var(--muted); font-size: 14px; }

.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.review-card { position: relative; padding: 24px; border: 1px solid var(--border); border-radius: 18px; background: #fff; box-shadow: var(--shadow-sm); }
.review-card::before { content: "“"; position: absolute; right: 18px; top: 3px; color: rgba(16,174,234,.16); font: 700 64px/1 Georgia, serif; }
.review-card p { position: relative; color: #355E79; }
.review-card strong { display: block; color: var(--heading); }
.review-card span { color: var(--muted); font-size: 13px; }

.notice-panel { padding: clamp(24px, 4vw, 38px); border: 1px solid rgba(16,174,234,.2); border-radius: var(--radius-lg); background: linear-gradient(135deg, rgba(232,247,255,.9), rgba(255,255,255,.96)); box-shadow: var(--shadow-sm); }
.notice-panel h2 { font-size: clamp(24px, 3vw, 34px); }
.notice-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 14px; margin-top: 22px; }
.notice-item { padding: 17px; border-radius: 15px; background: rgba(255,255,255,.82); border: 1px solid rgba(16,174,234,.14); }
.notice-item strong { display: block; margin-bottom: 4px; color: var(--heading); }
.notice-item span { color: var(--muted); font-size: 14px; }

.faq-list { display: grid; gap: 14px; }
details { border: 1px solid var(--border); border-radius: 16px; background: #fff; box-shadow: 0 8px 22px rgba(22,136,216,.07); overflow: hidden; }
summary { position: relative; padding: 19px 54px 19px 20px; color: var(--heading); font-weight: 700; cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 20px; top: 50%; width: 28px; height: 28px; display: grid; place-items: center; transform: translateY(-50%); border-radius: 50%; color: var(--primary-deep); background: var(--surface-soft); }
details[open] summary::after { content: "−"; }
details p { margin: 0; padding: 0 20px 20px; color: var(--muted); }

.cta-box { display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: center; gap: 24px; padding: clamp(28px, 5vw, 48px); border-radius: var(--radius-lg); color: #fff; background: linear-gradient(135deg, #0B76C5 0%, #10AEEA 55%, #35D7FF 100%); box-shadow: 0 20px 45px rgba(22,136,216,.25); }
.cta-box h2, .cta-box p { color: #fff; }
.cta-box p { margin-bottom: 0; opacity: .9; }
.cta-box .main-btn { color: var(--primary-deep); background: #fff; box-shadow: 0 10px 24px rgba(7,58,104,.16); }

.site-footer { margin-top: 0; color: #EAF8FF; background: #073A68; }
.footer-inner { width: var(--container); margin-inline: auto; display: grid; grid-template-columns: minmax(260px,1.05fr) minmax(0,1.5fr); gap: clamp(40px, 7vw, 90px); padding: 58px 0 38px; }
.footer-brand img { width: 140px; max-height: 50px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 460px; margin-top: 18px; color: rgba(234,248,255,.75); }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 24px; }
.footer-links h2 { margin-bottom: 14px; color: #fff; font-size: 16px; }
.footer-links a { display: block; width: fit-content; margin: 8px 0; color: rgba(234,248,255,.72); font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-notice { border-top: 1px solid rgba(234,248,255,.12); border-bottom: 1px solid rgba(234,248,255,.12); }
.footer-notice p { width: var(--container); margin: 0 auto; padding: 18px 0; color: rgba(234,248,255,.72); font-size: 13px; }
.footer-bottom { width: var(--container); margin-inline: auto; padding: 18px 0 24px; color: rgba(234,248,255,.55); font-size: 13px; }
.footer-bottom p { margin: 0; }

@media (max-width: 1179px) {
    .desktop-nav { display: none; }
    .header-inner { justify-content: space-between; }
    .menu-toggle { display: block; }
    .header-actions .main-btn { min-width: 72px; padding-inline: 18px; }
    .quick-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
    .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 900px) {
    .hero-grid, .split { grid-template-columns: 1fr; }
    .hero-copy { max-width: none; }
    .hero-visual { min-height: auto; }
    .split.reverse .split-copy, .split.reverse .split-media { order: initial; }
    .grid-3, .review-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .quick-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .notice-grid, .stats-strip { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-inner { grid-template-columns: 1fr; }
    .carousel { aspect-ratio: 16 / 8; }
}
@media (max-width: 640px) {
    :root { --container: min(100% - 24px, 1240px); }
    .site-header { height: 68px; }
    .site-main { padding-top: 68px; }
    .header-inner { width: min(100% - 20px, 1360px); gap: 8px; }
    .brand-logo img { width: 104px; }
    .header-actions .main-btn { min-width: 64px; padding: 9px 14px; font-size: 14px; }
    .menu-toggle { width: 40px; height: 40px; padding: 8px; }
    .hero-inner { padding-top: 58px; }
    h1 { font-size: clamp(31px, 11vw, 44px); }
    .carousel-wrap { padding-top: 12px; }
    .carousel { width: min(100% - 20px, 1360px); min-height: 180px; aspect-ratio: 4 / 3; border-radius: 18px; }
    .carousel-control { width: 38px; height: 38px; font-size: 20px; }
    .carousel-control.prev { left: 10px; }
    .carousel-control.next { right: 10px; }
    .carousel-dots { bottom: 10px; }
    .grid-2, .grid-3, .grid-4, .review-grid, .quick-grid, .notice-grid, .stats-strip { grid-template-columns: 1fr; }
    .card, .quick-item { padding: 20px; }
    .hero-actions { display: grid; grid-template-columns: 1fr 1fr; }
    .hero-actions a { width: 100%; }
    .cta-box { grid-template-columns: 1fr; }
    .cta-box .main-btn { width: 100%; }
    .footer-links { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}