:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #E8F7FF;
    --primary: #10AEEA;
    --primary-deep: #1688D8;
    --heading: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(16, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 45px rgba(21, 90, 157, 0.10);
    --radius: 22px;
    --header-height: 78px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    padding-top: var(--header-height);
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
body.drawer-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }

.skip-link {
    position: fixed;
    left: 16px;
    top: -80px;
    z-index: 3000;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--primary-deep);
    color: #fff;
    transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.container { width: min(100% - 32px, 1180px); margin-inline: auto; }
.wide-container { width: min(100% - 32px, 1360px); margin-inline: auto; }

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1200;
    height: var(--header-height);
    background: rgba(255, 255, 255, .96);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 28px rgba(21, 90, 157, .06);
    backdrop-filter: blur(14px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    height: 100%;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: clamp(10px, 1.5vw, 24px);
    min-width: 0;
}
.brand-logo { flex: 0 0 auto; width: clamp(112px, 9vw, 148px); }
.brand-logo img { width: 100%; max-height: 48px; object-fit: contain; }
.desktop-nav {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(3px, .45vw, 9px);
    overflow: hidden;
}
.desktop-nav a {
    flex: 0 0 auto;
    white-space: nowrap;
    padding: 8px clamp(4px, .4vw, 8px);
    border-radius: 999px;
    color: #365A73;
    font-size: clamp(11px, .72vw, 14px);
    line-height: 1.2;
    transition: color .2s ease, background .2s ease;
}
.desktop-nav a:hover,
.desktop-nav a.active { color: var(--primary-deep); background: var(--surface-soft); }
.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: 42px;
    padding: 10px 22px;
    border: 0;
    border-radius: 999px;
    color: #fff;
    font-weight: 700;
    white-space: nowrap;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    box-shadow: 0 10px 24px rgba(22, 136, 216, .22);
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(22, 136, 216, .28); }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 13px;
    background: var(--surface-soft);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}
.menu-toggle span { width: 20px; height: 2px; border-radius: 2px; background: var(--heading); }

.drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 1390;
    opacity: 0;
    background: rgba(7, 58, 104, .42);
    transition: opacity .22s ease;
}
.drawer-overlay.show { opacity: 1; }
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1400;
    width: min(88vw, 360px);
    height: 100dvh;
    padding: 22px;
    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; gap: 16px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.drawer-logo { width: 132px; }
.drawer-logo img { width: 100%; max-height: 44px; object-fit: contain; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 12px; background: var(--surface-soft); color: var(--heading); font-size: 30px; line-height: 1; }
.mobile-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 18px 0; }
.mobile-nav a { padding: 11px 12px; border: 1px solid var(--border); border-radius: 12px; background: #fff; color: var(--heading); font-size: 14px; text-align: center; }
.drawer-register { width: 100%; }

main { min-height: 60vh; }
.section { padding: clamp(54px, 7vw, 92px) 0; }
.section-soft { background: linear-gradient(180deg, rgba(232, 247, 255, .72), rgba(244, 251, 255, .32)); }
.section-dark { background: linear-gradient(135deg, #0A4D83, #087FB7); color: #fff; }
.section-dark h2, .section-dark h3, .section-dark .eyebrow { color: #fff; }
.section-dark p { color: rgba(255, 255, 255, .84); }
.section-head { max-width: 760px; margin-bottom: 30px; }
.section-head.center { margin-inline: auto; text-align: center; }
.eyebrow { display: inline-block; margin-bottom: 8px; color: var(--primary-deep); font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3 { margin: 0; color: var(--heading); line-height: 1.28; }
h1 { font-size: clamp(32px, 5vw, 58px); }
h2 { font-size: clamp(27px, 3.4vw, 42px); }
h3 { font-size: clamp(18px, 2vw, 24px); }
p { margin: 14px 0 0; }
.lead { font-size: clamp(17px, 1.6vw, 20px); color: var(--muted); }

.page-hero { padding: clamp(70px, 9vw, 118px) 0 clamp(52px, 7vw, 86px); background: radial-gradient(circle at 85% 15%, rgba(53, 215, 255, .28), transparent 30%), linear-gradient(180deg, #F9FDFF 0%, #E8F7FF 100%); }
.page-hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(280px, .92fr); align-items: center; gap: clamp(28px, 5vw, 64px); }
.page-hero-copy { max-width: 720px; }
.page-hero-copy .lead { margin-top: 20px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.text-link { display: inline-flex; align-items: center; gap: 7px; color: var(--primary-deep); font-weight: 700; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(3px); }
.secondary-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 10px 20px; border: 1px solid var(--border); border-radius: 999px; background: rgba(255,255,255,.85); color: var(--heading); font-weight: 700; }
.hero-media, .content-media { border-radius: var(--radius); overflow: hidden; background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow); }
.hero-media img, .content-media img { width: 100%; height: 100%; max-height: 500px; object-fit: contain; background: #fff; }

.slider-section { padding: clamp(22px, 3vw, 38px) 0 0; }
.slider {
    position: relative;
    width: min(100% - 32px, 1360px);
    margin-inline: auto;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: clamp(18px, 2.5vw, 30px);
    background: var(--surface-soft);
    box-shadow: var(--shadow);
}
.slider-track { display: flex; transition: transform .55s ease; }
.slide { min-width: 100%; aspect-ratio: 16 / 5.8; display: grid; place-items: center; background: var(--surface-soft); }
.slide img { width: 100%; height: 100%; object-fit: contain; }
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: clamp(40px, 4vw, 52px);
    height: clamp(40px, 4vw, 52px);
    border: 1px solid rgba(255,255,255,.65);
    border-radius: 50%;
    background: rgba(7, 58, 104, .48);
    color: #fff;
    font-size: 26px;
    display: grid;
    place-items: center;
    backdrop-filter: blur(8px);
}
.slider-arrow:hover { background: rgba(7, 58, 104, .68); }
.slider-prev { left: clamp(10px, 2vw, 24px); }
.slider-next { right: clamp(10px, 2vw, 24px); }
.slider-dots { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); display: flex; gap: 8px; }
.slider-dot { width: 10px; height: 10px; border: 0; border-radius: 999px; padding: 0; background: rgba(255,255,255,.66); box-shadow: 0 1px 5px rgba(7,58,104,.25); }
.slider-dot.active { width: 28px; background: #fff; }

.intro-band { padding: clamp(46px, 6vw, 76px) 0; }
.intro-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 24px; align-items: stretch; }
.intro-copy, .entry-card { padding: clamp(25px, 4vw, 42px); border-radius: var(--radius); background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow); }
.entry-card { background: linear-gradient(135deg, #0B9ED6, #1669B5); color: #fff; }
.entry-card h2, .entry-card h3 { color: #fff; }
.entry-card p { color: rgba(255,255,255,.84); }
.entry-card .main-btn { margin-top: 24px; background: #fff; color: var(--primary-deep); }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.card-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.info-card, .category-card, .product-card, .support-card {
    position: relative;
    min-width: 0;
    padding: 25px;
    border: 1px solid var(--border);
    border-radius: 19px;
    background: #fff;
    box-shadow: 0 13px 34px rgba(21,90,157,.07);
    transition: transform .2s ease, box-shadow .2s ease;
}
.info-card:hover, .category-card:hover, .product-card:hover, .support-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.category-card .index-number { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; margin-bottom: 18px; border-radius: 13px; color: #fff; font-weight: 800; background: linear-gradient(135deg, #35D7FF, #1688D8); }
.category-card p, .info-card p, .product-card p, .support-card p { color: var(--muted); }
.category-card .text-link, .info-card .text-link, .product-card .text-link { margin-top: 16px; }
.card-media { margin: -25px -25px 22px; border-radius: 19px 19px 0 0; overflow: hidden; background: var(--surface-soft); border-bottom: 1px solid var(--border); }
.card-media img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; background: #fff; }

.split-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, .92fr); align-items: center; gap: clamp(30px, 5vw, 68px); }
.split-layout.reverse .content-media { order: -1; }
.feature-list { display: grid; gap: 14px; margin-top: 26px; }
.feature-item { display: grid; grid-template-columns: 34px minmax(0,1fr); gap: 12px; align-items: start; }
.feature-mark { width: 30px; height: 30px; display: grid; place-items: center; border-radius: 10px; background: var(--surface-soft); color: var(--primary-deep); font-weight: 900; }
.feature-item strong { color: var(--heading); }
.feature-item p { margin-top: 3px; color: var(--muted); }

.pill-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.pill { padding: 8px 13px; border: 1px solid var(--border); border-radius: 999px; background: #fff; color: var(--heading); font-size: 14px; }

.timeline { display: grid; gap: 18px; counter-reset: step; }
.timeline-item { position: relative; padding: 24px 24px 24px 76px; border: 1px solid var(--border); border-radius: 18px; background: #fff; }
.timeline-item::before { counter-increment: step; content: counter(step); position: absolute; left: 22px; top: 24px; width: 36px; height: 36px; display: grid; place-items: center; border-radius: 12px; color: #fff; font-weight: 800; background: linear-gradient(135deg,#35D7FF,#1688D8); }
.timeline-item p { color: var(--muted); }

.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.review-card { padding: 24px; border: 1px solid var(--border); border-radius: 18px; background: #fff; box-shadow: 0 12px 30px rgba(21,90,157,.06); }
.review-head { display: flex; align-items: center; gap: 12px; color: var(--heading); }
.review-avatar { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%; background: var(--surface-soft); color: var(--primary-deep); font-weight: 800; }
.review-card p { color: var(--muted); }

.faq-list { display: grid; gap: 14px; }
.faq-item { border: 1px solid var(--border); border-radius: 16px; background: #fff; overflow: hidden; }
.faq-item summary { cursor: pointer; list-style: none; padding: 20px 54px 20px 22px; color: var(--heading); font-weight: 800; position: relative; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%); font-size: 26px; color: var(--primary-deep); }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { margin: 0; padding: 0 22px 22px; color: var(--muted); }

.notice-panel { display: grid; grid-template-columns: .8fr 1.2fr; gap: 28px; align-items: start; padding: clamp(28px, 4vw, 46px); border-radius: var(--radius); color: #fff; background: linear-gradient(135deg, #0B75B5, #073A68); box-shadow: var(--shadow); }
.notice-panel h2, .notice-panel .eyebrow { color: #fff; }
.notice-panel p { color: rgba(255,255,255,.84); }
.notice-links { grid-column: 2; display: flex; flex-wrap: wrap; gap: 14px; }
.notice-links a { color: #fff; font-weight: 700; text-decoration: underline; text-underline-offset: 4px; }

.contact-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.contact-card { padding: 28px; border: 1px solid var(--border); border-radius: 20px; background: #fff; }
.contact-card span { display: inline-block; margin-bottom: 12px; color: var(--primary-deep); font-weight: 800; }
.contact-card p { color: var(--muted); }

.site-footer { padding-top: 56px; background: var(--footer); color: var(--footer-text); }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 34px; }
.footer-brand img { width: 142px; max-height: 48px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 520px; color: rgba(234,248,255,.72); }
.footer-links { display: grid; align-content: start; gap: 9px; }
.footer-links h2 { margin-bottom: 7px; color: #fff; font-size: 17px; }
.footer-links a { color: rgba(234,248,255,.74); font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-bottom { margin-top: 42px; padding: 20px 0 24px; border-top: 1px solid rgba(234,248,255,.14); }
.footer-bottom p { margin: 0; color: rgba(234,248,255,.65); font-size: 14px; }

@media (max-width: 1179px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: inline-flex; }
    .header-inner { gap: 12px; }
    .brand-logo { margin-right: auto; }
}

@media (max-width: 900px) {
    :root { --header-height: 70px; }
    .page-hero-grid, .split-layout, .intro-grid, .notice-panel { grid-template-columns: 1fr; }
    .split-layout.reverse .content-media { order: 0; }
    .card-grid, .card-grid.four, .review-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .notice-links { grid-column: 1; }
    .slide { aspect-ratio: 16 / 7; }
}

@media (max-width: 640px) {
    :root { --header-height: 66px; }
    .container, .wide-container, .slider, .header-inner { width: min(100% - 24px, 100%); }
    .site-header { height: 66px; }
    .brand-logo { width: 114px; }
    .header-actions .main-btn { min-height: 38px; padding: 8px 16px; font-size: 14px; }
    .menu-toggle { width: 40px; height: 40px; }
    .section { padding: 50px 0; }
    .page-hero { padding: 58px 0 48px; }
    .page-hero-grid { gap: 28px; }
    .card-grid, .card-grid.four, .card-grid.two, .review-grid, .contact-grid { grid-template-columns: 1fr; }
    .slider-section { padding-top: 14px; }
    .slide { aspect-ratio: 16 / 8.5; }
    .slider-arrow { width: 38px; height: 38px; font-size: 21px; }
    .slider-dots { bottom: 9px; }
    .slider-dot { width: 8px; height: 8px; }
    .slider-dot.active { width: 22px; }
    .info-card, .category-card, .product-card, .support-card { padding: 22px; }
    .card-media { margin: -22px -22px 20px; }
    .hero-actions { display: grid; }
    .hero-actions > * { width: 100%; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-brand { grid-column: 1 / -1; }
    .notice-panel { padding: 26px 22px; }
    .timeline-item { padding-left: 68px; }
}

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