:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #E8F7FF;
    --primary: #10AEEA;
    --primary-strong: #1688D8;
    --primary-deep: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(16, 174, 234, .18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 45px rgba(22, 136, 216, .12);
    --radius: 24px;
    --container: min(calc(100% - 32px), 1360px);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", 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: 2000;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--primary-deep);
    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 24px rgba(22, 136, 216, .07);
    backdrop-filter: blur(14px);
}
.header-inner {
    width: var(--container);
    min-height: 76px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: clamp(10px, 1.2vw, 22px);
}
.brand-logo { flex: 0 0 auto; display: inline-flex; align-items: center; }
.brand-logo img { width: clamp(112px, 10vw, 150px); max-height: 50px; object-fit: contain; }
.desktop-nav {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(4px, .55vw, 12px);
    overflow: hidden;
}
.desktop-nav a {
    white-space: nowrap;
    flex: 0 1 auto;
    padding: 9px clamp(4px, .35vw, 8px);
    border-radius: 999px;
    color: var(--text);
    font-size: clamp(11px, .75vw, 14px);
    font-weight: 700;
    transition: background .2s ease, color .2s ease;
}
.desktop-nav a:hover, .desktop-nav a.is-active { background: var(--surface-soft); color: var(--primary-strong); }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.main-btn, .secondary-btn {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 22px;
    border: 0;
    border-radius: 999px;
    font-weight: 800;
    white-space: nowrap;
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn { color: #fff; background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%); box-shadow: 0 10px 22px rgba(22, 136, 216, .25); }
.secondary-btn { color: var(--primary-strong); background: #fff; border: 1px solid var(--border); }
.main-btn:hover, .secondary-btn:hover { transform: translateY(-2px); }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #fff;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}
.menu-toggle span { width: 20px; height: 2px; border-radius: 2px; background: var(--primary-deep); }
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1300;
    width: min(88vw, 390px);
    height: 100dvh;
    padding: 18px;
    background: #fff;
    transform: translateX(105%);
    transition: transform .25s ease;
    overflow-y: auto;
    box-shadow: -20px 0 50px rgba(7, 58, 104, .2);
}
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-backdrop { position: fixed; inset: 0; z-index: 1200; background: rgba(7, 58, 104, .45); opacity: 0; transition: opacity .22s ease; }
.drawer-backdrop.is-visible { opacity: 1; }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.drawer-logo img { width: 128px; max-height: 46px; object-fit: contain; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 50%; background: var(--surface-soft); color: var(--primary-deep); font-size: 28px; line-height: 1; }
.drawer-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; padding: 18px 0; }
.drawer-nav a { padding: 12px 14px; border: 1px solid var(--border); border-radius: 14px; background: var(--bg); color: var(--text); font-weight: 700; text-align: center; }
.drawer-nav a.is-active { background: var(--surface-soft); color: var(--primary-strong); }
.drawer-register { width: 100%; }
main { min-height: 60vh; }
.container { width: var(--container); margin-inline: auto; }
.section { padding: clamp(56px, 7vw, 96px) 0; }
.section.compact { padding: clamp(40px, 5vw, 72px) 0; }
.section.tint { background: var(--surface-soft); }
.section-heading { max-width: 820px; margin-bottom: 30px; }
.section-heading.center { margin-inline: auto; text-align: center; }
.eyebrow { margin: 0 0 8px; color: var(--primary-strong); font-size: .82rem; font-weight: 900; letter-spacing: .14em; text-transform: uppercase; }
h1, h2, h3 { margin: 0; line-height: 1.25; color: var(--primary-deep); }
h1 { font-size: clamp(2rem, 4.5vw, 4rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.65rem); }
h3 { font-size: clamp(1.08rem, 1.6vw, 1.32rem); }
p { margin: 0 0 1em; }
.lead { margin-top: 18px; color: var(--muted); font-size: clamp(1rem, 1.4vw, 1.18rem); }
.page-hero { padding: clamp(58px, 8vw, 110px) 0; background: linear-gradient(135deg, #F4FBFF 0%, #E8F7FF 58%, #FFFFFF 100%); border-bottom: 1px solid var(--border); }
.page-hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr); gap: clamp(30px, 5vw, 72px); align-items: center; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-image { min-height: 300px; padding: 22px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius); background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow); }
.hero-image img { width: 100%; max-height: 430px; object-fit: contain; }
.carousel-wrap { padding: 26px 0 0; }
.carousel {
    position: relative;
    width: var(--container);
    margin-inline: auto;
    overflow: hidden;
    border-radius: clamp(18px, 2.5vw, 30px);
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    aspect-ratio: 16 / 6.2;
}
.carousel-track { position: relative; width: 100%; height: 100%; }
.carousel-slide { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .55s ease; }
.carousel-slide.is-active { opacity: 1; pointer-events: auto; }
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; background: #fff; }
.carousel-arrow { position: absolute; top: 50%; z-index: 3; width: 46px; height: 46px; border: 1px solid rgba(255,255,255,.65); border-radius: 50%; background: rgba(7,58,104,.58); color: #fff; font-size: 26px; transform: translateY(-50%); backdrop-filter: blur(6px); }
.carousel-arrow.prev { left: 16px; }
.carousel-arrow.next { right: 16px; }
.carousel-dots { position: absolute; left: 50%; bottom: 16px; z-index: 3; 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,.65); box-shadow: 0 0 0 1px rgba(7,58,104,.2); }
.carousel-dot.is-active { width: 30px; border-radius: 999px; background: var(--primary-strong); }
.grid-2, .grid-3, .grid-4 { 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)); }
.card { height: 100%; padding: clamp(22px, 2.5vw, 32px); border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); box-shadow: 0 14px 35px rgba(22,136,216,.08); }
.card p { color: var(--muted); }
.card h3 + p { margin-top: 12px; }
.text-link { display: inline-flex; align-items: center; gap: 8px; color: var(--primary-strong); font-weight: 800; }
.text-link::after { content: '→'; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }
.image-card { padding: 0; overflow: hidden; }
.image-card .image-frame { min-height: 220px; padding: 20px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #F8FDFF, #E8F7FF); }
.image-card img { width: 100%; height: 260px; object-fit: contain; }
.image-card .card-body { padding: 26px; }
.split-section { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, .9fr); gap: clamp(28px, 5vw, 66px); align-items: center; }
.split-section.reverse > :first-child { order: 2; }
.split-image { padding: 20px; border-radius: var(--radius); background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow); }
.split-image img { width: 100%; max-height: 430px; object-fit: contain; }
.list-clean { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.list-clean li { position: relative; padding-left: 24px; color: var(--muted); }
.list-clean li::before { content: ''; position: absolute; left: 0; top: .72em; width: 9px; height: 9px; border-radius: 50%; background: linear-gradient(135deg, #35D7FF, #1688D8); box-shadow: 0 0 0 5px rgba(16,174,234,.1); }
.quick-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.quick-card { min-height: 210px; display: flex; flex-direction: column; }
.quick-card .text-link { margin-top: auto; }
.badge { display: inline-flex; align-items: center; width: fit-content; padding: 6px 12px; border-radius: 999px; background: var(--surface-soft); color: var(--primary-strong); font-size: .82rem; font-weight: 800; }
.notice { padding: 24px 26px; border-left: 4px solid var(--primary); border-radius: 0 18px 18px 0; background: #fff; box-shadow: 0 12px 30px rgba(22,136,216,.08); color: var(--muted); }
.steps { counter-reset: step; display: grid; gap: 16px; }
.step { position: relative; padding: 22px 22px 22px 72px; border-radius: 20px; background: #fff; border: 1px solid var(--border); }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 20px; top: 20px; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: linear-gradient(135deg,#35D7FF,#1688D8); color: #fff; font-weight: 900; }
.testimonial { position: relative; padding-top: 44px; }
.testimonial::before { content: '“'; position: absolute; top: 5px; left: 24px; color: rgba(16,174,234,.26); font-size: 64px; font-family: Georgia, serif; line-height: 1; }
.testimonial cite { display: block; margin-top: 16px; color: var(--primary-strong); font-style: normal; font-weight: 800; }
.faq-list { display: grid; gap: 14px; }
.faq-item { border: 1px solid var(--border); border-radius: 18px; background: #fff; overflow: hidden; }
.faq-question { width: 100%; padding: 20px 22px; border: 0; background: transparent; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: var(--primary-deep); text-align: left; font-weight: 800; }
.faq-question::after { content: '+'; flex: 0 0 auto; font-size: 24px; color: var(--primary-strong); }
.faq-item.is-open .faq-question::after { content: '−'; }
.faq-answer { display: none; padding: 0 22px 22px; color: var(--muted); }
.faq-item.is-open .faq-answer { display: block; }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.tag-list span { padding: 8px 12px; border: 1px solid var(--border); border-radius: 999px; background: #fff; color: var(--primary-deep); font-size: .9rem; font-weight: 700; }
.cta-box { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px; align-items: center; padding: clamp(28px, 4vw, 48px); border-radius: var(--radius); background: linear-gradient(135deg,#0B6FB8,#10AEEA); color: #fff; box-shadow: var(--shadow); }
.cta-box h2, .cta-box p { color: #fff; }
.cta-box p { margin: 12px 0 0; opacity: .9; }
.site-footer { background: var(--footer); color: var(--footer-text); }
.footer-inner { width: var(--container); margin: 0 auto; padding: 56px 0 36px; display: grid; grid-template-columns: 1.1fr 1.9fr; gap: 50px; }
.footer-brand img { width: 145px; max-height: 54px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 480px; margin-top: 18px; color: rgba(234,248,255,.78); }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 26px; }
.footer-links h2 { margin-bottom: 14px; color: #fff; font-size: 1rem; }
.footer-links a { display: block; margin: 8px 0; color: rgba(234,248,255,.78); }
.footer-links a:hover { color: #fff; }
.footer-note { border-top: 1px solid rgba(234,248,255,.16); padding: 22px max(16px, calc((100% - 1360px) / 2)); text-align: center; color: rgba(234,248,255,.7); font-size: .9rem; }
.footer-note p { margin: 4px 0; }
.back-to-top { position: fixed; right: 18px; bottom: 18px; z-index: 900; width: 46px; height: 46px; border: 0; border-radius: 50%; background: var(--primary-strong); color: #fff; box-shadow: 0 12px 30px rgba(22,136,216,.3); opacity: 0; visibility: hidden; transform: translateY(10px); transition: .2s ease; }
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .header-inner { min-height: 70px; }
    .menu-toggle { display: inline-flex; }
    .header-actions { margin-left: auto; }
    .quick-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
    .page-hero-grid, .split-section, .footer-inner { grid-template-columns: 1fr; }
    .split-section.reverse > :first-child { order: initial; }
    .hero-image { min-height: 240px; }
    .grid-4, .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .quick-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .carousel { aspect-ratio: 16 / 8.4; }
    .footer-links { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
    :root { --container: min(calc(100% - 24px), 1360px); --radius: 20px; }
    .header-inner { gap: 8px; }
    .brand-logo img { width: 106px; }
    .header-actions .main-btn { min-height: 40px; padding: 8px 16px; }
    .menu-toggle { width: 40px; height: 40px; }
    .carousel-wrap { padding-top: 14px; }
    .carousel { aspect-ratio: 16 / 10; border-radius: 16px; }
    .carousel-arrow { width: 38px; height: 38px; font-size: 22px; }
    .carousel-arrow.prev { left: 8px; }
    .carousel-arrow.next { right: 8px; }
    .carousel-dots { bottom: 10px; }
    .grid-4, .grid-3, .grid-2, .quick-grid, .footer-links { grid-template-columns: 1fr; }
    .quick-card { min-height: auto; }
    .cta-box { grid-template-columns: 1fr; }
    .cta-box .main-btn { width: 100%; }
    .drawer-nav { grid-template-columns: 1fr 1fr; }
    .footer-inner { gap: 30px; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}