:root {
    --bg: #F4FBFF;
    --surface-soft: #E8F7FF;
    --surface: #FFFFFF;
    --primary: #11AEEA;
    --primary-strong: #1688D8;
    --deep-blue: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(17, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 50px rgba(21, 90, 157, 0.10);
    --shadow-soft: 0 10px 30px rgba(21, 90, 157, 0.08);
    --radius-lg: 26px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --container: min(100% - 32px, 1200px);
}

* { 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: "PingFang SC", "Microsoft YaHei", "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 { font: inherit; }
button { cursor: pointer; }
.skip-link {
    position: fixed;
    left: 16px;
    top: -80px;
    z-index: 2000;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--deep-blue);
    color: #fff;
    transition: top .2s ease;
}
.skip-link:focus { top: 16px; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,.96);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 26px rgba(21,90,157,.06);
    backdrop-filter: blur(14px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    min-height: 76px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: clamp(12px, 1.7vw, 26px);
}
.brand-logo { flex: 0 0 auto; display: inline-flex; align-items: center; }
.brand-logo img { width: clamp(106px, 9vw, 142px); max-height: 48px; object-fit: contain; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(8px, .85vw, 17px);
}
.desktop-nav a {
    position: relative;
    white-space: nowrap;
    color: var(--text);
    font-size: clamp(13px, .92vw, 15px);
    font-weight: 600;
    padding: 9px 0;
    transition: color .2s ease;
}
.desktop-nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    right: 50%;
    bottom: 2px;
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    transition: left .2s ease, right .2s ease;
}
.desktop-nav a:hover, .desktop-nav a.is-active { color: var(--primary-strong); }
.desktop-nav a:hover::after, .desktop-nav a.is-active::after { left: 0; right: 0; }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.main-btn, .secondary-btn, .text-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    font-weight: 700;
    line-height: 1.2;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.main-btn {
    min-height: 42px;
    padding: 11px 23px;
    color: #fff;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    box-shadow: 0 10px 24px rgba(22,136,216,.22);
    white-space: nowrap;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(22,136,216,.28); }
.secondary-btn {
    min-height: 42px;
    padding: 10px 22px;
    color: var(--primary-strong);
    background: #fff;
    border: 1px solid var(--border);
}
.secondary-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-soft); }
.text-link { color: var(--primary-strong); gap: 6px; padding: 4px 0; }
.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(--deep-blue); }
.drawer-overlay { position: fixed; inset: 0; z-index: 1001; background: rgba(7,58,104,.42); opacity: 0; transition: opacity .22s ease; }
.drawer-overlay.is-visible { opacity: 1; }
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1002;
    width: min(88vw, 390px);
    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.is-open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-bottom: 17px; border-bottom: 1px solid var(--border); }
.drawer-logo img { width: 125px; max-height: 44px; object-fit: contain; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 12px; background: var(--surface-soft); color: var(--deep-blue); font-size: 28px; line-height: 1; }
.mobile-nav { display: grid; gap: 7px; padding: 18px 0; }
.mobile-nav a { padding: 11px 13px; border-radius: 11px; color: var(--text); font-weight: 650; }
.mobile-nav a:hover, .mobile-nav a.is-active { color: var(--primary-strong); background: var(--surface-soft); }
.drawer-register { width: 100%; }

main { min-height: 60vh; }
.container { width: var(--container); margin-inline: auto; }
.section { padding: clamp(62px, 7vw, 104px) 0; }
.section.compact { padding: clamp(46px, 5vw, 72px) 0; }
.section-soft { background: var(--surface-soft); }
.section-white { background: #fff; }
.section-head { max-width: 760px; margin-bottom: 34px; }
.section-head.center { margin-inline: auto; text-align: center; }
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    color: var(--primary-strong);
    font-size: 14px;
    font-weight: 800;
    letter-spacing: .08em;
}
.eyebrow::before { content: ""; width: 26px; height: 3px; border-radius: 3px; background: var(--primary); }
h1, h2, h3 { margin-top: 0; color: var(--deep-blue); line-height: 1.25; }
h1 { margin-bottom: 18px; font-size: clamp(34px, 5vw, 64px); letter-spacing: -.03em; }
h2 { margin-bottom: 14px; font-size: clamp(27px, 3.2vw, 42px); }
h3 { margin-bottom: 9px; font-size: clamp(18px, 2vw, 23px); }
p { margin-top: 0; }
.lead { max-width: 760px; color: var(--muted); font-size: clamp(17px, 1.7vw, 20px); }
.muted { color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 24px; }

.page-hero {
    position: relative;
    overflow: hidden;
    padding: clamp(74px, 9vw, 124px) 0 clamp(58px, 7vw, 94px);
    background:
        radial-gradient(circle at 88% 18%, rgba(53,215,255,.24), transparent 34%),
        linear-gradient(145deg, #f9fdff 0%, #e8f7ff 58%, #f4fbff 100%);
}
.page-hero::after {
    content: "";
    position: absolute;
    width: 340px;
    height: 340px;
    right: -110px;
    bottom: -190px;
    border: 45px solid rgba(17,174,234,.08);
    border-radius: 50%;
}
.page-hero .container { position: relative; z-index: 1; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.breadcrumbs a { color: var(--primary-strong); }

.carousel-wrap { padding: 22px 0 0; }
.carousel {
    position: relative;
    width: min(100% - 32px, 1360px);
    margin: 0 auto;
    overflow: hidden;
    border-radius: clamp(18px, 3vw, 32px);
    background: var(--surface-soft);
    box-shadow: var(--shadow);
}
.carousel-track { display: flex; transition: transform .55s cubic-bezier(.22,.61,.36,1); }
.carousel-slide { flex: 0 0 100%; min-width: 0; background: var(--surface-soft); }
.carousel-slide img { width: 100%; height: clamp(230px, 38vw, 560px); object-fit: contain; }
.carousel-arrow {
    position: absolute;
    top: 50%;
    z-index: 2;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(255,255,255,.75);
    border-radius: 50%;
    background: rgba(7,58,104,.38);
    color: #fff;
    font-size: 24px;
    transform: translateY(-50%);
    backdrop-filter: blur(8px);
}
.carousel-arrow:hover { background: rgba(7,58,104,.58); }
.carousel-arrow.prev { left: 18px; }
.carousel-arrow.next { right: 18px; }
.carousel-dots { position: absolute; left: 50%; bottom: 16px; z-index: 2; 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,.58); box-shadow: 0 0 0 1px rgba(7,58,104,.10); }
.carousel-dot.is-active { width: 28px; border-radius: 999px; background: #fff; }

.intro-grid, .split-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr); gap: clamp(30px, 6vw, 80px); align-items: center; }
.split-grid.reverse { grid-template-columns: minmax(300px, .9fr) minmax(0, 1.1fr); }
.split-grid.reverse .media-card { order: -1; }
.media-card { overflow: hidden; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow); }
.media-card img { width: 100%; max-height: 470px; object-fit: contain; background: #fff; }
.media-card figcaption { padding: 14px 18px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--border); }

.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)); }
.card {
    min-width: 0;
    padding: clamp(22px, 2.5vw, 30px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--shadow-soft);
    transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card p:last-child { margin-bottom: 0; }
.card-number { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; margin-bottom: 16px; border-radius: 14px; color: #fff; font-weight: 800; background: linear-gradient(135deg, #35D7FF, #1688D8); }
.quick-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; }
.quick-card { display: flex; min-height: 220px; flex-direction: column; justify-content: space-between; padding: 23px; border: 1px solid var(--border); border-radius: 18px; background: #fff; box-shadow: var(--shadow-soft); }
.quick-card h3 { font-size: 20px; }
.quick-card p { color: var(--muted); font-size: 14px; }

.feature-list { display: grid; gap: 14px; padding: 0; margin: 24px 0 0; list-style: none; }
.feature-list li { position: relative; padding-left: 30px; color: var(--text); }
.feature-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--primary-strong); font-weight: 900; }
.notice-box { padding: 24px; border: 1px solid var(--border); border-left: 5px solid var(--primary); border-radius: 16px; background: #fff; box-shadow: var(--shadow-soft); }
.notice-box strong { color: var(--deep-blue); }

.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.review-card { padding: 24px; border-radius: 18px; background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow-soft); }
.review-card blockquote { margin: 0 0 18px; color: var(--text); }
.review-card cite { color: var(--primary-strong); font-style: normal; font-weight: 800; }
.review-card.wide { grid-column: span 2; }

.faq-list { display: grid; gap: 14px; }
.faq-item { border: 1px solid var(--border); border-radius: 15px; background: #fff; box-shadow: var(--shadow-soft); }
.faq-item summary { padding: 18px 22px; cursor: pointer; color: var(--deep-blue); 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: 22px; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding: 0 22px 20px; margin: 0; color: var(--muted); }

.tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0; }
.tag { display: inline-flex; padding: 7px 13px; border-radius: 999px; color: var(--primary-strong); background: var(--surface-soft); font-size: 14px; font-weight: 700; }
.info-table { width: 100%; overflow: hidden; border-collapse: collapse; border-radius: 16px; background: #fff; box-shadow: var(--shadow-soft); }
.info-table th, .info-table td { padding: 16px 18px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.info-table th { width: 26%; color: var(--deep-blue); background: rgba(232,247,255,.72); }
.info-table tr:last-child th, .info-table tr:last-child td { border-bottom: 0; }

.cta-band { padding: 34px; border-radius: var(--radius-lg); background: linear-gradient(135deg, #0f9fd8 0%, #155a9d 100%); color: #fff; box-shadow: var(--shadow); }
.cta-band h2, .cta-band h3 { color: #fff; }
.cta-band p { color: rgba(255,255,255,.86); }
.cta-band .secondary-btn { border-color: rgba(255,255,255,.35); }

.site-footer { background: var(--footer); color: var(--footer-text); }
.footer-inner { width: var(--container); margin: 0 auto; padding: 58px 0 42px; display: grid; grid-template-columns: minmax(240px, 1fr) minmax(480px, 1.4fr); gap: 60px; }
.footer-brand img { width: 140px; max-height: 48px; margin-bottom: 18px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 480px; color: rgba(234,248,255,.78); }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.footer-links h2 { color: #fff; font-size: 17px; }
.footer-links a { display: block; width: fit-content; margin: 8px 0; color: rgba(234,248,255,.78); font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-notice { padding: 24px max(16px, calc((100% - 1200px) / 2)); border-top: 1px solid rgba(234,248,255,.14); text-align: center; color: rgba(234,248,255,.68); font-size: 13px; }
.footer-notice p { margin-bottom: 6px; }

@media (max-width: 1179px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: inline-block; }
    .header-inner { min-height: 70px; }
    .brand-logo { margin-right: auto; }
    .quick-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .card-grid.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
    .intro-grid, .split-grid, .split-grid.reverse { grid-template-columns: 1fr; }
    .split-grid.reverse .media-card { order: 0; }
    .card-grid, .review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .review-card.wide { grid-column: auto; }
    .quick-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-inner { grid-template-columns: 1fr; gap: 34px; }
}
@media (max-width: 620px) {
    :root { --container: min(100% - 24px, 1200px); }
    .header-inner { width: min(100% - 20px, 1360px); gap: 8px; }
    .brand-logo img { width: 102px; }
    .header-actions { gap: 7px; }
    .header-actions .main-btn { min-height: 40px; padding: 10px 17px; }
    .menu-toggle { width: 40px; height: 40px; padding: 8px; }
    .carousel { width: min(100% - 20px, 1360px); }
    .carousel-slide img { height: clamp(200px, 62vw, 360px); }
    .carousel-arrow { width: 40px; height: 40px; font-size: 20px; }
    .carousel-arrow.prev { left: 10px; }
    .carousel-arrow.next { right: 10px; }
    .carousel-dots { bottom: 10px; }
    .section { padding: 56px 0; }
    .card-grid, .card-grid.two, .card-grid.four, .review-grid, .quick-grid { grid-template-columns: 1fr; }
    .quick-card { min-height: 0; }
    .footer-links { grid-template-columns: 1fr 1fr; }
    .info-table, .info-table tbody, .info-table tr, .info-table th, .info-table td { display: block; width: 100%; }
    .info-table th { border-bottom: 0; padding-bottom: 7px; }
    .info-table td { padding-top: 7px; }
    .cta-band { padding: 26px 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; }
}