:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --primary: #10AEEA;
    --deep: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --line: #D6EDF8;
    --shadow: 0 18px 48px rgba(18, 105, 159, .12);
    --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; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif; line-height: 1.75; overflow-x: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 1000; padding: 10px 14px; border-radius: 10px; background: #fff; color: var(--deep); box-shadow: var(--shadow); }
.skip-link:focus { top: 12px; }
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.section { padding: 76px 0; }
.section.compact { padding: 52px 0; }
.section.soft { background: var(--soft); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
.section-head h2, .page-title { margin: 0; color: var(--deep); line-height: 1.2; }
.section-head h2 { font-size: clamp(28px, 3vw, 42px); }
.section-head p { max-width: 650px; margin: 0; color: var(--muted); }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 12px; padding: 6px 12px; border-radius: 999px; color: var(--deep); background: rgba(16,174,234,.11); font-size: 14px; font-weight: 700; letter-spacing: .04em; }
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 6px rgba(16,174,234,.10); }
.main-btn, .outline-btn, .text-link { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 999px; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.main-btn { min-height: 44px; padding: 0 22px; color: #fff; background: var(--gradient); box-shadow: 0 10px 24px rgba(22,136,216,.24); }
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(22,136,216,.3); }
.outline-btn { min-height: 44px; padding: 0 22px; color: var(--deep); border: 1px solid #9BDCF5; background: #fff; }
.text-link { color: var(--deep); }
.text-link::after { content: "→"; }
.site-header { position: sticky; top: 0; z-index: 100; border-bottom: 1px solid rgba(155,220,245,.6); background: rgba(255,255,255,.94); backdrop-filter: blur(16px); }
.header-inner { width: min(1320px, calc(100% - 32px)); min-height: 76px; margin-inline: auto; display: grid; grid-template-columns: 172px minmax(0, 1fr) auto; align-items: center; gap: 22px; }
.brand-logo img, .drawer-logo img, .footer-brand img { object-fit: contain; }
.brand-logo img { width: 148px; max-height: 50px; }
.desktop-nav { min-width: 0; display: flex; align-items: center; justify-content: center; gap: clamp(10px, 1.4vw, 22px); white-space: nowrap; }
.desktop-nav a { position: relative; padding: 25px 0 22px; color: #39566e; font-size: 14px; font-weight: 650; }
.desktop-nav a::after { content: ""; position: absolute; left: 50%; bottom: 14px; width: 0; height: 3px; border-radius: 3px; background: var(--gradient); transform: translateX(-50%); transition: width .2s ease; }
.desktop-nav a:hover, .desktop-nav a.active { color: var(--deep); }
.desktop-nav a:hover::after, .desktop-nav a.active::after { width: 26px; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.menu-toggle span { display: block; width: 100%; height: 2px; margin: 5px 0; border-radius: 2px; background: var(--deep); }
.drawer-backdrop { position: fixed; inset: 0; z-index: 200; background: rgba(3,38,65,.48); backdrop-filter: blur(2px); }
.mobile-drawer { position: fixed; top: 0; right: 0; z-index: 210; width: min(390px, 88vw); height: 100dvh; padding: 22px; background: #fff; transform: translateX(105%); transition: transform .28s ease; overflow-y: auto; box-shadow: -22px 0 60px rgba(7,58,104,.22); }
.mobile-drawer.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(--line); }
.drawer-logo img { width: 142px; max-height: 48px; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 50%; color: var(--deep); background: var(--soft); font-size: 28px; line-height: 1; }
.mobile-nav { display: grid; gap: 6px; padding: 18px 0; }
.mobile-nav a { display: flex; align-items: center; justify-content: space-between; padding: 11px 14px; border-radius: 12px; color: #39566e; }
.mobile-nav a:hover, .mobile-nav a.active { color: var(--deep); background: var(--soft); }
.drawer-register { width: 100%; }
body.drawer-open { overflow: hidden; }
.hero-carousel { position: relative; overflow: hidden; background: #dff4ff; }
.carousel-track { display: flex; transition: transform .55s cubic-bezier(.22,.61,.36,1); }
.carousel-slide { flex: 0 0 100%; }
.carousel-slide img { width: 100%; aspect-ratio: 1920 / 680; object-fit: contain; background: #dff4ff; }
.carousel-arrow { position: absolute; top: 50%; z-index: 3; width: 48px; height: 48px; border: 1px solid rgba(255,255,255,.65); border-radius: 50%; color: #fff; background: rgba(7,58,104,.42); transform: translateY(-50%); font-size: 26px; }
.carousel-arrow:hover { background: rgba(7,58,104,.7); }
.carousel-arrow.prev { left: 24px; }
.carousel-arrow.next { right: 24px; }
.carousel-dots { position: absolute; left: 50%; bottom: 18px; z-index: 3; display: flex; gap: 9px; transform: translateX(-50%); }
.carousel-dot { width: 10px; height: 10px; padding: 0; border: 1px solid rgba(255,255,255,.9); border-radius: 50%; background: rgba(7,58,104,.28); }
.carousel-dot.active { width: 26px; border-radius: 999px; background: #fff; }
.intro-grid, .feature-split, .app-banner, .security-layout, .page-hero-grid { display: grid; align-items: center; gap: clamp(32px, 5vw, 70px); }
.intro-grid, .feature-split, .page-hero-grid { grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr); }
.intro-copy h1 { margin: 0 0 18px; color: var(--deep); font-size: clamp(36px, 5vw, 64px); line-height: 1.1; }
.intro-copy p { margin: 0 0 16px; color: #4a6478; font-size: 17px; }
.action-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.media-frame { overflow: hidden; border-radius: var(--radius-lg); background: linear-gradient(145deg, #dff5ff, #fff); box-shadow: var(--shadow); }
.media-frame img { width: 100%; max-height: 500px; object-fit: contain; }
.quick-scroll { display: flex; gap: 12px; padding: 4px 2px 14px; overflow-x: auto; scrollbar-width: thin; }
.quick-scroll a { flex: 0 0 auto; min-width: 126px; padding: 12px 18px; border: 1px solid var(--line); border-radius: 999px; color: var(--deep); background: #fff; font-weight: 700; text-align: center; box-shadow: 0 8px 22px rgba(18,105,159,.07); }
.quick-scroll a:hover { color: #fff; border-color: transparent; background: var(--gradient); }
.dashboard-grid, .card-grid, .review-grid, .faq-grid, .triple-grid, .service-grid { display: grid; gap: 20px; }
.dashboard-grid { grid-template-columns: repeat(4, 1fr); }
.card-grid { grid-template-columns: repeat(3, 1fr); }
.review-grid { grid-template-columns: repeat(3, 1fr); }
.faq-grid { grid-template-columns: repeat(2, 1fr); }
.triple-grid { grid-template-columns: repeat(3, 1fr); }
.service-grid { grid-template-columns: repeat(4, 1fr); }
.info-card, .content-card, .review-card, .faq-card, .service-card, .notice-card, .stat-card { border: 1px solid rgba(165,220,243,.78); border-radius: var(--radius-md); background: #fff; box-shadow: 0 12px 34px rgba(18,105,159,.08); }
.info-card, .content-card, .review-card, .faq-card, .service-card, .notice-card { padding: 26px; }
.stat-card { padding: 24px; }
.info-card h3, .content-card h3, .service-card h3, .faq-card h3, .notice-card h3, .stat-card h3 { margin: 0 0 10px; color: var(--deep); }
.info-card p, .content-card p, .review-card p, .faq-card p, .service-card p, .notice-card p, .stat-card p { margin: 0; color: var(--muted); }
.info-card .number { display: inline-flex; width: 38px; height: 38px; align-items: center; justify-content: center; margin-bottom: 18px; border-radius: 12px; color: #fff; background: var(--gradient); font-weight: 800; }
.feature-split.reverse .media-frame { order: 2; }
.feature-copy h2 { margin: 0 0 16px; color: var(--deep); font-size: clamp(30px, 4vw, 48px); line-height: 1.2; }
.feature-copy p { color: var(--muted); }
.check-list { display: grid; gap: 12px; margin: 22px 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 28px; color: #3d586d; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--primary); font-weight: 900; }
.content-card .card-image { margin: -26px -26px 22px; overflow: hidden; border-radius: var(--radius-md) var(--radius-md) 0 0; background: var(--soft); }
.content-card .card-image img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; }
.content-card .text-link { margin-top: 16px; }
.app-banner { grid-template-columns: 1.05fr .95fr; padding: clamp(28px, 5vw, 58px); border-radius: 32px; color: #fff; background: linear-gradient(120deg, #0aaeea 0%, #0a73bb 56%, #073a68 100%); overflow: hidden; box-shadow: var(--shadow); }
.app-banner h2 { margin: 0 0 16px; color: #fff; font-size: clamp(30px, 4vw, 48px); line-height: 1.2; }
.app-banner p { color: #dff6ff; }
.app-banner .outline-btn { border-color: rgba(255,255,255,.55); color: #fff; background: rgba(255,255,255,.1); }
.app-banner .media-frame { box-shadow: none; background: rgba(255,255,255,.08); }
.security-layout { grid-template-columns: 1fr 1fr; }
.security-tips { display: grid; gap: 14px; }
.security-tips .notice-card { padding: 20px 22px; }
.review-card { position: relative; }
.review-card::before { content: "“"; position: absolute; right: 22px; top: 10px; color: #d8f2fc; font-size: 64px; line-height: 1; font-family: Georgia, serif; }
.review-card strong { display: block; margin-top: 18px; color: var(--deep); }
.faq-card button { width: 100%; display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; padding: 0; border: 0; color: var(--deep); background: transparent; text-align: left; font-weight: 800; }
.faq-card button span:last-child { flex: 0 0 auto; font-size: 24px; transition: transform .2s ease; }
.faq-answer { display: none; padding-top: 14px; color: var(--muted); }
.faq-card.open .faq-answer { display: block; }
.faq-card.open button span:last-child { transform: rotate(45deg); }
.page-hero { padding: 64px 0 46px; background: radial-gradient(circle at 15% 20%, rgba(53,215,255,.22), transparent 30%), linear-gradient(180deg, #fff 0%, #eefaff 100%); }
.page-title { font-size: clamp(38px, 5vw, 62px); }
.page-lead { max-width: 760px; margin: 18px 0 0; color: var(--muted); font-size: 18px; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.breadcrumbs a { color: var(--deep); }
.article-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(280px, .5fr); gap: 28px; align-items: start; }
.article-main, .article-side { display: grid; gap: 22px; }
.prose-card { padding: clamp(26px, 4vw, 42px); border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; box-shadow: 0 12px 34px rgba(18,105,159,.07); }
.prose-card h2 { margin-top: 0; color: var(--deep); font-size: clamp(26px, 3vw, 38px); line-height: 1.25; }
.prose-card h3 { color: var(--deep); }
.prose-card p { color: #4b6579; }
.prose-card p:last-child { margin-bottom: 0; }
.side-nav { position: sticky; top: 98px; }
.side-nav a { display: block; padding: 11px 0; border-bottom: 1px solid var(--line); color: #456277; }
.side-nav a:hover { color: var(--primary); }
.image-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.image-row .media-frame img { aspect-ratio: 16 / 10; object-fit: contain; }
.feedback-list { display: grid; gap: 14px; }
.feedback-item { padding: 18px 20px; border-left: 4px solid var(--primary); border-radius: 0 14px 14px 0; background: #f6fcff; }
.feedback-item strong { color: var(--deep); }
.compliance-box { padding: 26px; border: 1px solid #a4def4; border-radius: var(--radius-md); background: linear-gradient(135deg, #f5fcff, #e6f7ff); }
.compliance-box h2 { margin-top: 0; color: var(--deep); }
.compliance-box p { margin-bottom: 0; color: #49657a; }
.site-footer { padding: 62px 0 24px; color: var(--footer-text); background: var(--footer); }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 40px; }
.footer-brand img { width: 152px; max-height: 52px; margin-bottom: 18px; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 460px; color: #c9e9f8; }
.site-footer h2 { margin: 0 0 16px; color: #fff; font-size: 17px; }
.site-footer a { display: block; margin: 9px 0; color: #cfeefc; }
.site-footer a:hover { color: #fff; }
.footer-notice { margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(234,248,255,.16); color: #b9deef; font-size: 13px; }
.footer-notice p { margin: 5px 0; }
.empty-state { display: grid; place-items: center; min-height: 320px; padding: 40px; border-radius: var(--radius-lg); color: var(--muted); background: linear-gradient(145deg, #e7f8ff, #fff); text-align: center; }
@media (max-width: 1180px) {
    .header-inner { grid-template-columns: 1fr auto; }
    .desktop-nav { display: none; }
    .menu-toggle { display: block; }
}
@media (max-width: 980px) {
    .dashboard-grid, .service-grid { grid-template-columns: repeat(2, 1fr); }
    .card-grid, .review-grid, .triple-grid { grid-template-columns: repeat(2, 1fr); }
    .intro-grid, .feature-split, .page-hero-grid, .app-banner, .security-layout, .article-grid { grid-template-columns: 1fr; }
    .feature-split.reverse .media-frame { order: 0; }
    .article-side { grid-template-columns: repeat(2, 1fr); }
    .side-nav { position: static; }
    .footer-grid { grid-template-columns: 1.4fr repeat(2, 1fr); }
    .footer-grid > div:last-child { grid-column: 2 / 4; }
}
@media (max-width: 720px) {
    .container { width: min(100% - 28px, 1180px); }
    .section { padding: 56px 0; }
    .header-inner { width: calc(100% - 24px); min-height: 68px; }
    .brand-logo img { width: 124px; }
    .header-actions .main-btn { min-height: 40px; padding: 0 18px; }
    .menu-toggle { width: 40px; height: 40px; }
    .carousel-slide img { aspect-ratio: 16 / 7; }
    .carousel-arrow { width: 40px; height: 40px; font-size: 22px; }
    .carousel-arrow.prev { left: 10px; }
    .carousel-arrow.next { right: 10px; }
    .carousel-dots { bottom: 10px; }
    .section-head { align-items: flex-start; flex-direction: column; }
    .dashboard-grid, .card-grid, .review-grid, .faq-grid, .triple-grid, .service-grid, .image-row, .article-side { grid-template-columns: 1fr; }
    .app-banner { padding: 28px 22px; }
    .page-hero { padding: 46px 0 34px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-grid > div:last-child { grid-column: auto; }
}
@media (max-width: 480px) {
    .header-actions { gap: 6px; }
    .header-actions .main-btn { padding: 0 14px; }
    .carousel-arrow { display: none; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-grid > div:last-child { grid-column: auto; }
}