:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #E8F7FF;
    --primary: #10AEEA;
    --primary-deep: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --line: rgba(21, 90, 157, .13);
    --footer: #073A68;
    --shadow: 0 16px 48px rgba(31, 104, 158, .12);
    --shadow-soft: 0 10px 30px rgba(31, 104, 158, .08);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --gradient: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
}
* { 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", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.75;
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea { font: inherit; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 999; transform: translateY(-150%); background: #fff; padding: 8px 14px; border-radius: 10px; }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 0; z-index: 90; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.header-shell { width: min(1440px, calc(100% - 40px)); min-height: 78px; margin: 0 auto; display: flex; align-items: center; gap: 22px; }
.brand-logo { flex: 0 0 auto; width: 136px; }
.brand-logo img, .drawer-logo img, .footer-brand img { width: 100%; height: auto; object-fit: contain; }
.desktop-nav { min-width: 0; margin-left: auto; display: flex; align-items: center; justify-content: flex-end; gap: clamp(8px, 1vw, 20px); white-space: nowrap; }
.desktop-nav a { position: relative; padding: 26px 0 22px; color: var(--muted); font-size: 14px; font-weight: 700; }
.desktop-nav a::after { content: ""; position: absolute; left: 50%; bottom: 14px; width: 0; height: 3px; border-radius: 999px; background: var(--gradient); transform: translateX(-50%); transition: width .25s ease; }
.desktop-nav a:hover, .desktop-nav a.is-active { color: var(--primary-deep); }
.desktop-nav a:hover::after, .desktop-nav a.is-active::after { width: 22px; }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 12px; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.main-btn, .secondary-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 24px; border-radius: 999px; font-weight: 800; transition: transform .2s ease, box-shadow .2s ease; }
.main-btn { background: var(--gradient); color: #fff; box-shadow: 0 12px 26px rgba(22,136,216,.22); }
.secondary-btn { border: 1px solid rgba(16,174,234,.28); background: #fff; color: var(--primary-deep); }
.main-btn:hover, .secondary-btn:hover { transform: translateY(-2px); }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 14px; background: #fff; align-items: center; justify-content: center; flex-direction: column; gap: 5px; cursor: pointer; }
.menu-toggle span { width: 20px; height: 2px; border-radius: 99px; background: var(--primary-deep); }
.drawer-overlay { position: fixed; inset: 0; z-index: 97; background: rgba(3,35,63,.52); opacity: 0; visibility: hidden; transition: .25s ease; }
.drawer-overlay.is-visible { opacity: 1; visibility: visible; }
.mobile-drawer { position: fixed; top: 0; right: 0; z-index: 98; width: min(390px, 88vw); height: 100dvh; overflow-y: auto; background: #fff; transform: translateX(105%); transition: transform .28s ease; box-shadow: -20px 0 50px rgba(7,58,104,.18); }
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-head { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 20px; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); }
.drawer-logo { width: 130px; }
.drawer-close { border: 0; background: var(--surface-soft); color: var(--primary-deep); width: 42px; height: 42px; border-radius: 50%; font-size: 28px; cursor: pointer; }
.drawer-nav { display: grid; padding: 12px 20px 20px; }
.drawer-nav a { display: flex; align-items: center; justify-content: space-between; padding: 14px 4px; border-bottom: 1px solid var(--line); color: var(--text); font-weight: 700; }
.drawer-nav a.is-active { color: var(--primary); }
.drawer-register { margin: 0 20px 28px; width: calc(100% - 40px); }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 82px 0; }
.section-tight { padding: 56px 0; }
.section-soft { background: var(--surface-soft); }
.section-white { background: var(--surface); }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 12px; color: var(--primary); font-weight: 800; letter-spacing: .08em; font-size: 13px; }
.eyebrow::before { content: ""; width: 22px; height: 3px; border-radius: 99px; background: var(--gradient); }
.section-heading { max-width: 760px; margin-bottom: 34px; }
.section-heading.center { margin-left: auto; margin-right: auto; text-align: center; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 18px; color: var(--primary-deep); font-size: clamp(34px, 5vw, 58px); line-height: 1.18; letter-spacing: -.04em; }
h2 { margin-bottom: 14px; color: var(--primary-deep); font-size: clamp(26px, 3vw, 38px); line-height: 1.3; }
h3 { margin-bottom: 10px; color: var(--primary-deep); font-size: 20px; line-height: 1.4; }
p { color: var(--muted); }
.lead { font-size: clamp(17px, 2vw, 20px); color: var(--text); }
.text-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 8px; color: var(--primary-deep); font-weight: 800; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }
.carousel-wrap { padding: 22px 0 0; }
.hero-carousel { position: relative; width: min(1460px, calc(100% - 32px)); margin: 0 auto; overflow: hidden; border-radius: 28px; background: #dff4ff; box-shadow: var(--shadow); }
.carousel-track { display: flex; transition: transform .55s cubic-bezier(.22,.61,.36,1); }
.carousel-slide { flex: 0 0 100%; aspect-ratio: 16 / 6.25; display: grid; place-items: center; background: #eefaff; }
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; }
.carousel-arrow { position: absolute; top: 50%; z-index: 2; width: 46px; height: 46px; border: 0; border-radius: 50%; background: rgba(255,255,255,.88); color: var(--primary-deep); box-shadow: 0 8px 24px rgba(7,58,104,.16); transform: translateY(-50%); cursor: pointer; font-size: 26px; }
.carousel-arrow.prev { left: 18px; }
.carousel-arrow.next { right: 18px; }
.carousel-dots { position: absolute; left: 50%; bottom: 16px; z-index: 3; display: flex; gap: 8px; transform: translateX(-50%); }
.carousel-dot { width: 9px; height: 9px; border: 0; border-radius: 50%; background: rgba(255,255,255,.62); cursor: pointer; box-shadow: 0 0 0 1px rgba(21,90,157,.12); }
.carousel-dot.is-active { width: 28px; border-radius: 99px; background: #fff; }
.brand-intro { display: grid; grid-template-columns: 1.05fr .95fr; gap: 42px; align-items: center; }
.brand-copy { padding: 18px 0; }
.brand-copy .button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.media-card { min-height: 360px; display: grid; place-items: center; padding: 28px; overflow: hidden; border-radius: var(--radius-lg); background: linear-gradient(145deg, #fff 0%, #e8f7ff 100%); box-shadow: var(--shadow-soft); }
.media-card img { width: 100%; height: 100%; max-height: 420px; object-fit: contain; }
.quick-scroll { display: flex; gap: 12px; overflow-x: auto; padding: 2px 2px 14px; scrollbar-width: thin; scroll-snap-type: x proximity; }
.quick-scroll a { flex: 0 0 auto; scroll-snap-align: start; padding: 12px 19px; border-radius: 999px; border: 1px solid rgba(16,174,234,.18); background: #fff; color: var(--primary-deep); font-weight: 800; box-shadow: 0 8px 18px rgba(31,104,158,.06); }
.quick-scroll a:hover { background: var(--gradient); color: #fff; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 24px; }
.info-card, .content-card, .review-card, .faq-card, .step-card, .safe-card { border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-soft); }
.info-card { padding: 26px; }
.info-card .num { display: inline-flex; width: 42px; height: 42px; align-items: center; justify-content: center; margin-bottom: 18px; border-radius: 14px; background: var(--surface-soft); color: var(--primary-deep); font-weight: 900; }
.content-card { overflow: hidden; }
.content-card .card-image { min-height: 220px; padding: 20px; display: grid; place-items: center; background: linear-gradient(145deg,#effaff,#fff); }
.content-card .card-image img { width: 100%; height: 220px; object-fit: contain; }
.content-card .card-body { padding: 25px; }
.feature-panel { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; align-items: stretch; padding: 28px; border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.feature-panel.reverse { grid-template-columns: .9fr 1.1fr; }
.feature-panel.reverse .feature-media { order: 2; }
.feature-media { min-height: 360px; display: grid; place-items: center; padding: 20px; border-radius: 22px; background: linear-gradient(145deg,#e7f7ff,#f9fdff); }
.feature-media img { width: 100%; height: 100%; max-height: 390px; object-fit: contain; }
.feature-copy { align-self: center; padding: 18px; }
.feature-copy ul, .plain-list { margin: 18px 0 0; padding: 0; list-style: none; }
.feature-copy li, .plain-list li { position: relative; padding: 8px 0 8px 28px; color: var(--muted); }
.feature-copy li::before, .plain-list li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 900; }
.combo-card { display: flex; flex-direction: column; overflow: hidden; border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-soft); border: 1px solid var(--line); }
.combo-card .combo-image { min-height: 210px; display: grid; place-items: center; padding: 20px; background: #effaff; }
.combo-card img { width: 100%; height: 210px; object-fit: contain; }
.combo-card .combo-body { padding: 24px; }
.app-banner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 30px; align-items: center; padding: 42px; border-radius: 30px; background: linear-gradient(135deg, #e5f8ff 0%, #fff 50%, #d8f2ff 100%); box-shadow: var(--shadow); }
.app-banner img { width: 100%; max-height: 330px; object-fit: contain; }
.security-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; }
.security-image { min-height: 380px; display: grid; place-items: center; padding: 24px; border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-soft); }
.security-image img { width: 100%; max-height: 380px; object-fit: contain; }
.safe-stack { display: grid; gap: 14px; }
.safe-card { padding: 20px 22px; }
.safe-card strong { display: block; margin-bottom: 5px; color: var(--primary-deep); }
.review-card { padding: 25px; }
.review-card .review-user { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; color: var(--primary-deep); font-weight: 900; }
.review-card .avatar { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; background: var(--surface-soft); color: var(--primary); }
.review-card p { margin-bottom: 0; }
.faq-list { display: grid; gap: 14px; }
.faq-card { padding: 22px 24px; }
.faq-card summary { cursor: pointer; color: var(--primary-deep); font-weight: 800; }
.faq-card p { margin: 14px 0 0; }
.notice-panel { padding: 30px; border-radius: var(--radius-lg); border: 1px solid rgba(16,174,234,.24); background: linear-gradient(135deg,#fff,#e9f8ff); }
.notice-panel h2 { font-size: 28px; }
.entry-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 16px; }
.entry-card { padding: 22px; border-radius: 18px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-soft); }
.entry-card h3 { font-size: 18px; }
.inner-hero { padding: 70px 0 48px; }
.inner-hero-shell { display: grid; grid-template-columns: 1.05fr .95fr; gap: 38px; align-items: center; padding: 44px; border-radius: 34px; background: linear-gradient(135deg,#fff 0%,#e5f8ff 100%); box-shadow: var(--shadow); }
.inner-hero.no-media .inner-hero-shell { grid-template-columns: 1fr; }
.inner-hero-media { min-height: 330px; display: grid; place-items: center; padding: 18px; border-radius: 25px; background: rgba(255,255,255,.72); }
.inner-hero-media img { width: 100%; height: 100%; max-height: 350px; object-fit: contain; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; color: var(--muted); font-size: 14px; }
.breadcrumbs a { color: var(--primary-deep); }
.page-content-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.page-copy-card { padding: 28px; border-radius: var(--radius-md); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-soft); }
.page-copy-card.full { grid-column: 1 / -1; }
.steps { counter-reset: steps; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
.step-card { position: relative; padding: 26px; }
.step-card::before { counter-increment: steps; content: "0" counter(steps); display: block; margin-bottom: 15px; color: var(--primary); font-weight: 900; letter-spacing: .08em; }
.gallery-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 18px; }
.gallery-item { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: var(--shadow-soft); }
.gallery-item .gallery-image { height: 190px; display: grid; place-items: center; padding: 16px; background: #effaff; }
.gallery-item img { width: 100%; height: 100%; object-fit: contain; }
.gallery-item h3 { padding: 18px 18px 0; font-size: 18px; }
.gallery-item p { padding: 0 18px 20px; }
.contact-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 20px; }
.contact-card { padding: 26px; border-radius: var(--radius-md); border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-soft); }
.form-note { padding: 26px; border-radius: var(--radius-md); background: #fff; border: 1px solid var(--line); }
.site-footer { background: var(--footer); color: #eaf8ff; }
.footer-shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 60px 0 36px; display: grid; grid-template-columns: 1.1fr 1.9fr; gap: 56px; }
.footer-brand img { width: 150px; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 500px; margin-top: 18px; color: #c9e8f8; }
.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: 5px 0; color: #c9e8f8; }
.footer-links a:hover { color: #fff; }
.footer-notice { border-top: 1px solid rgba(234,248,255,.13); border-bottom: 1px solid rgba(234,248,255,.13); }
.footer-notice p { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 20px 0; color: #c9e8f8; font-size: 14px; }
.footer-bottom { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 20px 0 26px; color: #a9d4ea; font-size: 14px; }
@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: inline-flex; }
    .header-shell { min-height: 72px; }
    .brand-logo { margin-right: auto; }
}
@media (max-width: 980px) {
    .brand-intro, .feature-panel, .feature-panel.reverse, .app-banner, .security-layout, .inner-hero-shell, .page-content-grid { grid-template-columns: 1fr; }
    .feature-panel.reverse .feature-media { order: 0; }
    .grid-4, .entry-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .gallery-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .footer-shell { grid-template-columns: 1fr; gap: 34px; }
    .inner-hero-media { min-height: 260px; }
}
@media (max-width: 720px) {
    .container, .header-shell, .footer-shell, .footer-notice p, .footer-bottom { width: min(100% - 28px, 1180px); }
    .header-shell { gap: 10px; }
    .brand-logo { width: 118px; }
    .header-actions .main-btn { min-height: 40px; padding: 0 18px; }
    .section { padding: 62px 0; }
    .section-tight { padding: 44px 0; }
    .carousel-wrap { padding-top: 12px; }
    .hero-carousel { width: calc(100% - 20px); border-radius: 20px; }
    .carousel-slide { aspect-ratio: 16 / 8.5; }
    .carousel-arrow { width: 40px; height: 40px; font-size: 22px; }
    .carousel-arrow.prev { left: 10px; }
    .carousel-arrow.next { right: 10px; }
    .grid-3, .grid-2, .steps, .contact-grid { grid-template-columns: 1fr; }
    .grid-4, .entry-grid { grid-template-columns: 1fr; }
    .feature-panel, .app-banner, .inner-hero-shell { padding: 24px; border-radius: 24px; }
    .media-card, .feature-media, .security-image { min-height: 260px; }
    .inner-hero { padding: 42px 0 30px; }
    h1 { font-size: clamp(32px, 11vw, 46px); }
    .footer-links { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
    .header-actions { gap: 8px; }
    .menu-toggle { width: 40px; height: 40px; }
    .header-actions .main-btn { padding: 0 15px; font-size: 14px; }
    .brand-logo { width: 104px; }
    .carousel-dots { bottom: 10px; }
    .carousel-arrow { width: 34px; height: 34px; }
    .gallery-grid, .footer-links { grid-template-columns: 1fr; }
    .app-banner { padding: 22px; }
}