/* 开云响应式官网 */
:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --primary: #11AEEA;
    --primary-strong: #1688D8;
    --deep: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(17, 174, 234, .18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 50px rgba(17, 119, 184, .12);
    --shadow-sm: 0 10px 28px rgba(17, 119, 184, .09);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --header-h: 76px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 0;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.75;
    padding-top: var(--header-h);
}
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; }
.container { width: min(100% - 32px, 1220px); margin-inline: auto; }
.skip-link { position: fixed; left: 12px; top: -60px; z-index: 9999; padding: 10px 16px; border-radius: 8px; background: var(--deep); color: #fff; transition: top .2s ease; }
.skip-link:focus { top: 12px; }
.site-header { position: fixed; inset: 0 0 auto; z-index: 1000; height: var(--header-h); background: rgba(255,255,255,.95); border-bottom: 1px solid var(--border); backdrop-filter: blur(18px); }
.header-inner { width: min(100% - 32px, 1360px); height: 100%; margin-inline: auto; display: flex; align-items: center; gap: clamp(14px, 2vw, 32px); min-width: 0; }
.brand-logo { flex: 0 0 auto; display: inline-flex; align-items: center; }
.brand-logo img, .drawer-logo img, .footer-logo img { width: auto; object-fit: contain; }
.brand-logo img { max-width: 132px; max-height: 46px; }
.desktop-nav { flex: 1; min-width: 0; display: flex; align-items: center; justify-content: center; gap: clamp(8px, .85vw, 18px); overflow: hidden; }
.desktop-nav a { position: relative; white-space: nowrap; font-size: clamp(13px, .84vw, 15px); color: var(--muted); padding: 11px 2px; transition: color .2s ease; }
.desktop-nav a::after { content: ""; position: absolute; left: 50%; right: 50%; bottom: 3px; height: 2px; border-radius: 999px; background: var(--primary); transition: left .2s ease, right .2s ease; }
.desktop-nav a:hover, .desktop-nav a.is-active { color: var(--deep); }
.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 { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 0 24px; border: 0; border-radius: 999px; background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%); color: #fff; font-weight: 700; box-shadow: 0 12px 26px rgba(22,136,216,.23); transition: transform .2s ease, box-shadow .2s ease; white-space: nowrap; }
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(22,136,216,.3); }
.compact-btn { min-height: 42px; padding-inline: 21px; }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); align-items: center; justify-content: center; flex-direction: column; gap: 5px; }
.menu-toggle span { width: 20px; height: 2px; border-radius: 2px; background: var(--deep); }
.drawer-overlay { position: fixed; inset: 0; z-index: 1090; background: rgba(7,58,104,.44); backdrop-filter: blur(4px); }
.mobile-drawer { position: fixed; top: 0; right: 0; z-index: 1100; width: min(88vw, 380px); height: 100dvh; padding: 22px; background: #fff; transform: translateX(105%); transition: transform .28s ease; overflow-y: auto; box-shadow: -20px 0 60px rgba(7,58,104,.18); }
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.drawer-logo img { max-width: 132px; max-height: 46px; }
.drawer-close { width: 42px; height: 42px; border: 1px solid var(--border); border-radius: 50%; background: var(--soft); color: var(--deep); font-size: 28px; line-height: 1; }
.mobile-nav { display: grid; margin: 18px 0; }
.mobile-nav a { padding: 13px 12px; border-bottom: 1px solid rgba(17,174,234,.11); color: var(--text); font-weight: 600; }
.mobile-nav a:hover, .mobile-nav a.is-active { color: var(--primary-strong); background: var(--soft); border-radius: 10px; }
.drawer-register { width: 100%; }
main { min-height: 62vh; }
.hero-slider-wrap { padding: 22px 0 0; }
.hero-slider { position: relative; width: min(100% - 32px, 1360px); aspect-ratio: 16 / 6.3; margin-inline: auto; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--soft); box-shadow: var(--shadow); }
.slides { height: 100%; }
.slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .55s ease; }
.slide.is-active { opacity: 1; visibility: visible; }
.slide img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.slider-arrow { position: absolute; top: 50%; z-index: 3; width: 48px; height: 48px; border: 1px solid rgba(255,255,255,.72); border-radius: 50%; background: rgba(7,58,104,.55); color: #fff; font-size: 28px; line-height: 1; transform: translateY(-50%); backdrop-filter: blur(8px); }
.slider-arrow:hover { background: rgba(7,58,104,.78); }
.slider-prev { left: 18px; }
.slider-next { right: 18px; }
.slider-dots { position: absolute; left: 50%; bottom: 16px; z-index: 3; display: flex; gap: 9px; transform: translateX(-50%); }
.slider-dot { width: 10px; height: 10px; padding: 0; border: 2px solid #fff; border-radius: 50%; background: rgba(255,255,255,.35); box-shadow: 0 2px 10px rgba(7,58,104,.22); }
.slider-dot.is-active { width: 28px; border-radius: 999px; background: #fff; }
.home-intro { padding: 72px 0 34px; }
.intro-panel, .page-hero-inner { position: relative; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-lg); background: linear-gradient(135deg, #fff 0%, #eefaff 100%); box-shadow: var(--shadow-sm); }
.intro-panel { display: grid; grid-template-columns: 1.35fr .65fr; gap: 38px; align-items: center; padding: clamp(28px, 5vw, 64px); }
.intro-panel::before, .page-hero-inner::before { content: ""; position: absolute; width: 300px; height: 300px; right: -110px; top: -150px; border-radius: 50%; background: radial-gradient(circle, rgba(53,215,255,.32), transparent 70%); pointer-events: none; }
.eyebrow { display: inline-flex; align-items: center; min-height: 30px; padding: 3px 12px; border-radius: 999px; background: var(--soft); color: var(--primary-strong); font-size: 13px; font-weight: 800; letter-spacing: .06em; }
h1, h2, h3 { margin: 0; line-height: 1.25; color: var(--deep); }
h1 { margin-top: 16px; font-size: clamp(36px, 5vw, 68px); letter-spacing: -.035em; }
h2 { font-size: clamp(28px, 3.2vw, 46px); letter-spacing: -.025em; }
h3 { font-size: clamp(19px, 1.8vw, 24px); }
p { margin: 0; }
.lead { margin-top: 18px; color: var(--muted); font-size: clamp(17px, 1.5vw, 20px); }
.intro-copy p + p, .prose p + p, .card p, .review-card p, .notice-panel p, .page-hero-copy p + p { margin-top: 12px; }
.intro-actions, .hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 26px; }
.text-link { display: inline-flex; align-items: center; gap: 7px; color: var(--primary-strong); font-weight: 800; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }
.intro-stats { display: grid; gap: 14px; }
.stat-card { padding: 20px; border: 1px solid var(--border); border-radius: var(--radius-md); background: rgba(255,255,255,.82); }
.stat-card strong { display: block; color: var(--primary-strong); font-size: 28px; }
.stat-card span { color: var(--muted); }
.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }
.section-soft { background: var(--soft); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 28px; }
.section-head-copy { max-width: 760px; }
.section-head .eyebrow { margin-bottom: 12px; }
.section-head p { max-width: 680px; color: var(--muted); }
.grid-2, .grid-3, .grid-4, .grid-5 { 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)); }
.grid-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.card, .review-card, .info-panel, .faq-card, .step-card { min-width: 0; padding: 26px; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface); box-shadow: var(--shadow-sm); }
.card { transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.card:hover { transform: translateY(-5px); border-color: rgba(17,174,234,.38); box-shadow: var(--shadow); }
.card-number, .step-number { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; margin-bottom: 18px; border-radius: 14px; background: linear-gradient(135deg, rgba(53,215,255,.2), rgba(22,136,216,.16)); color: var(--primary-strong); font-weight: 900; }
.card h3 + p, .step-card h3 + p { margin-top: 10px; color: var(--muted); }
.card .text-link { margin-top: 18px; }
.media-card { overflow: hidden; padding: 0; }
.media-frame { position: relative; min-height: 220px; overflow: hidden; border-radius: calc(var(--radius-md) - 1px); background: linear-gradient(145deg, #dff7ff, #fff); }
.media-frame img { width: 100%; height: 100%; max-height: 420px; object-fit: contain; object-position: center; }
.media-body { padding: 24px; }
.feature-split { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: center; }
.feature-split.reverse .feature-media { order: 2; }
.feature-copy { padding: clamp(8px, 2vw, 24px); }
.feature-copy h2 { margin-top: 14px; }
.feature-copy .lead { margin-bottom: 18px; }
.feature-copy ul, .check-list { margin: 22px 0 0; padding: 0; list-style: none; display: grid; gap: 11px; }
.feature-copy li, .check-list li { position: relative; padding-left: 30px; color: var(--muted); }
.feature-copy li::before, .check-list li::before { content: "✓"; position: absolute; left: 0; top: 1px; width: 21px; height: 21px; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; background: var(--soft); color: var(--primary-strong); font-size: 13px; font-weight: 900; }
.feature-media { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.feature-media img { width: 100%; max-height: 520px; object-fit: contain; }
.notice-panel { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 30px; border: 1px solid var(--border); border-radius: var(--radius-md); background: linear-gradient(135deg, #fff, #e9f8ff); box-shadow: var(--shadow-sm); }
.notice-panel h2 { font-size: clamp(24px, 2.5vw, 34px); }
.notice-panel p { color: var(--muted); }
.review-card { position: relative; }
.review-card::before { content: "“"; position: absolute; top: 10px; right: 20px; color: rgba(17,174,234,.14); font-size: 74px; font-weight: 900; line-height: 1; }
.review-card strong { display: block; margin-top: 18px; color: var(--deep); }
.review-card span { color: var(--muted); font-size: 14px; }
.page-hero { padding: 38px 0 0; }
.page-hero-inner { display: grid; grid-template-columns: 1.25fr .75fr; gap: 36px; align-items: center; padding: clamp(32px, 5vw, 62px); }
.page-hero-inner.no-media { grid-template-columns: 1fr; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--primary-strong); }
.page-hero h1 { font-size: clamp(36px, 4.8vw, 62px); }
.page-hero-media { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-sm); }
.page-hero-media img { width: 100%; max-height: 430px; object-fit: contain; }
.prose { color: var(--muted); }
.prose h2, .prose h3 { margin-top: 28px; }
.prose h2:first-child, .prose h3:first-child { margin-top: 0; }
.prose p { margin-top: 12px; }
.steps { counter-reset: steps; }
.step-card { position: relative; }
.step-number { border-radius: 50%; }
.faq-list { display: grid; gap: 14px; }
.faq-item { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-sm); background: #fff; box-shadow: var(--shadow-sm); }
.faq-item summary { position: relative; padding: 20px 56px 20px 22px; color: var(--deep); font-weight: 800; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; top: 50%; right: 22px; transform: translateY(-50%); color: var(--primary-strong); font-size: 24px; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding: 0 22px 22px; color: var(--muted); }
.contact-list { display: grid; gap: 12px; margin-top: 20px; }
.contact-item { padding: 18px 20px; border: 1px solid var(--border); border-radius: 14px; background: var(--soft); }
.contact-item strong { display: block; color: var(--deep); }
.contact-item span { color: var(--muted); }
.site-footer { margin-top: 70px; background: var(--footer); color: var(--footer-text); }
.footer-grid { display: grid; grid-template-columns: .9fr 1.6fr; gap: 72px; padding: 64px 0 48px; }
.footer-logo { display: inline-flex; padding: 10px 14px; border-radius: 12px; background: #fff; }
.footer-logo img { max-width: 130px; max-height: 44px; }
.footer-brand p { max-width: 480px; margin-top: 20px; color: rgba(234,248,255,.78); }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.footer-links h2 { margin-bottom: 14px; color: #fff; font-size: 17px; }
.footer-links a { display: block; padding: 4px 0; color: rgba(234,248,255,.78); }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(234,248,255,.14); }
.footer-bottom-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 20px 0; color: rgba(234,248,255,.72); font-size: 14px; }
.age-note { padding: 26px; border: 1px solid rgba(17,174,234,.3); border-radius: var(--radius-md); background: linear-gradient(135deg, #e7f8ff, #fff); }
.age-note h2 { font-size: clamp(24px, 2.5vw, 34px); }
.age-note p { margin-top: 10px; color: var(--muted); }

@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: inline-flex; }
    .brand-logo { margin-right: auto; }
    .hero-slider { aspect-ratio: 16 / 7.3; }
    .grid-5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 920px) {
    :root { --header-h: 70px; }
    .intro-panel, .page-hero-inner, .feature-split { grid-template-columns: 1fr; }
    .feature-split.reverse .feature-media { order: 0; }
    .intro-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: 1fr; gap: 40px; }
    .section-head { align-items: start; flex-direction: column; }
    .notice-panel { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 680px) {
    :root { --radius-lg: 20px; --radius-md: 16px; }
    .container, .header-inner, .hero-slider { width: min(100% - 24px, 1220px); }
    .header-inner { gap: 8px; }
    .brand-logo img { max-width: 108px; max-height: 38px; }
    .compact-btn { min-height: 40px; padding-inline: 16px; font-size: 14px; }
    .menu-toggle { width: 40px; height: 40px; }
    .hero-slider-wrap { padding-top: 14px; }
    .hero-slider { aspect-ratio: 16 / 9.5; }
    .slider-arrow { width: 38px; height: 38px; font-size: 22px; }
    .slider-prev { left: 9px; }
    .slider-next { right: 9px; }
    .slider-dots { bottom: 10px; }
    .home-intro { padding-top: 34px; }
    .intro-panel, .page-hero-inner { padding: 26px 22px; }
    .intro-stats, .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
    .section { padding: 50px 0; }
    .section-sm { padding: 34px 0; }
    .card, .review-card, .info-panel, .faq-card, .step-card { padding: 22px; }
    .footer-links { grid-template-columns: 1fr 1fr; }
    .footer-bottom-inner { align-items: flex-start; flex-direction: column; }
    .page-hero { padding-top: 22px; }
    .main-btn { min-height: 46px; padding-inline: 20px; }
}
@media (max-width: 430px) {
    .compact-btn { padding-inline: 14px; }
    .footer-links { grid-template-columns: 1fr; }
    .mobile-drawer { width: 92vw; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}