:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --primary: #10AEEA;
    --primary-strong: #1688D8;
    --deep: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(16, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 50px rgba(18, 125, 188, 0.12);
    --shadow-sm: 0 10px 28px rgba(18, 125, 188, 0.09);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --container: min(100% - 32px, 1360px);
    --header-height: 78px;
}

* { 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;
    font-size: 16px;
    line-height: 1.75;
    padding-top: var(--header-height);
}
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; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.28; color: var(--deep); }
h1 { font-size: clamp(2.1rem, 4.2vw, 4.6rem); letter-spacing: -0.035em; margin-bottom: 22px; }
h2 { font-size: clamp(1.65rem, 2.9vw, 2.8rem); letter-spacing: -0.025em; margin-bottom: 16px; }
h3 { font-size: clamp(1.06rem, 1.7vw, 1.35rem); margin-bottom: 10px; }
p { color: var(--muted); }
.container { width: var(--container); margin-inline: auto; }
.section { padding: clamp(58px, 7vw, 100px) 0; }
.section-soft { background: var(--soft); }
.skip-link {
    position: fixed;
    left: 16px;
    top: -80px;
    z-index: 3000;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--deep);
    color: #fff;
    transition: top .2s ease;
}
.skip-link:focus { top: 10px; }

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255,255,255,.96);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 28px rgba(7,58,104,.06);
    backdrop-filter: blur(14px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    height: 100%;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: clamp(14px, 1.8vw, 28px);
}
.brand-logo { flex: 0 0 auto; display: flex; align-items: center; }
.brand-logo img { width: clamp(132px, 11vw, 168px); height: auto; object-fit: contain; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(5px, .62vw, 12px);
    white-space: nowrap;
}
.desktop-nav a {
    position: relative;
    padding: 9px clamp(3px, .38vw, 7px);
    color: #3c5a72;
    font-size: clamp(.76rem, .72vw, .9rem);
    font-weight: 700;
    transition: color .2s ease;
}
.desktop-nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    right: 50%;
    bottom: 2px;
    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(--primary-strong); }
.desktop-nav a:hover::after, .desktop-nav a.is-active::after { left: 7px; right: 7px; }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 24px;
    border: 0;
    border-radius: 999px;
    color: #fff;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    box-shadow: 0 10px 24px rgba(22,136,216,.22);
    font-weight: 800;
    white-space: nowrap;
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(22,136,216,.28); }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #fff;
}
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 2px; background: var(--deep); }
.drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1090;
    background: rgba(7,58,104,.38);
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s ease;
}
.mobile-drawer {
    position: fixed;
    inset: 0 0 0 auto;
    z-index: 1100;
    width: min(88vw, 390px);
    padding: 20px;
    overflow-y: auto;
    background: #fff;
    transform: translateX(102%);
    transition: transform .28s ease;
    box-shadow: -18px 0 60px rgba(7,58,104,.22);
}
.drawer-open .drawer-backdrop { opacity: 1; pointer-events: auto; }
.drawer-open .mobile-drawer { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.drawer-logo img { width: 150px; height: auto; object-fit: contain; }
.drawer-close { width: 42px; height: 42px; border: 1px solid var(--border); border-radius: 12px; background: var(--soft); color: var(--deep); font-size: 26px; line-height: 1; }
.drawer-nav { display: grid; gap: 5px; padding: 18px 0; }
.drawer-nav a { display: flex; justify-content: space-between; align-items: center; padding: 11px 13px; border-radius: 11px; color: #38556d; font-weight: 700; }
.drawer-nav a:hover, .drawer-nav a.is-active { background: var(--soft); color: var(--primary-strong); }
.drawer-register { width: 100%; }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 13px;
    color: var(--primary-strong);
    font-size: .82rem;
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; border-radius: 999px; background: var(--primary); }
.section-heading { max-width: 760px; margin-bottom: 30px; }
.section-heading p { margin-bottom: 0; font-size: 1.02rem; }
.text-btn, .inline-link { display: inline-flex; align-items: center; gap: 8px; color: var(--primary-strong); font-weight: 800; }
.text-btn { min-height: 44px; padding: 0 4px; }
.inline-link { margin-top: auto; padding-top: 8px; }
.inline-link span { transition: transform .2s ease; }
.inline-link:hover span { transform: translateX(4px); }
.card-tag { display: inline-flex; margin-bottom: 13px; padding: 5px 10px; border-radius: 999px; background: var(--soft); color: var(--primary-strong); font-size: .76rem; font-weight: 800; }

.page-hero { position: relative; overflow: hidden; background: linear-gradient(145deg, #fff 0%, #eefaff 58%, #dff5ff 100%); }
.page-hero::before, .page-hero::after { content: ""; position: absolute; border-radius: 50%; pointer-events: none; }
.page-hero::before { width: 420px; height: 420px; right: -190px; top: -210px; background: rgba(53,215,255,.19); }
.page-hero::after { width: 300px; height: 300px; left: -150px; bottom: -190px; background: rgba(22,136,216,.08); }
.page-hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr); align-items: center; gap: clamp(32px, 6vw, 90px); }
.page-hero-copy { max-width: 700px; }
.page-hero-copy p { max-width: 680px; font-size: clamp(1rem, 1.45vw, 1.18rem); }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 28px; }
.page-hero-media, .split-media { margin: 0; padding: clamp(16px, 2vw, 26px); border: 1px solid var(--border); border-radius: var(--radius-xl); background: rgba(255,255,255,.82); box-shadow: var(--shadow); }
.page-hero-media img, .split-media img { width: 100%; max-height: 440px; object-fit: contain; border-radius: calc(var(--radius-xl) - 10px); }

.hero-slider-wrap { padding: 24px 0 0; background: linear-gradient(180deg, #edfaff 0%, var(--bg) 100%); }
.hero-slider {
    position: relative;
    width: var(--container);
    aspect-ratio: 16 / 6.4;
    min-height: 280px;
    margin-inline: auto;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: #e9f8ff;
    box-shadow: var(--shadow);
}
.slider-track { height: 100%; display: flex; transition: transform .55s cubic-bezier(.2,.72,.2,1); }
.slide { flex: 0 0 100%; height: 100%; margin: 0; display: grid; place-items: center; background: #eefaff; }
.slide img { width: 100%; height: 100%; object-fit: contain; }
.slider-arrow { position: absolute; top: 50%; z-index: 4; width: 46px; height: 46px; 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(7px); }
.slider-arrow:hover { background: rgba(7,58,104,.78); }
.slider-prev { left: 18px; }
.slider-next { right: 18px; }
.slider-dots { position: absolute; z-index: 4; left: 50%; bottom: 17px; display: flex; gap: 8px; transform: translateX(-50%); }
.slider-dot { width: 9px; height: 9px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.62); box-shadow: 0 0 0 1px rgba(7,58,104,.25); }
.slider-dot.is-active { width: 24px; border-radius: 999px; background: #fff; }

.home-intro { padding-top: clamp(54px, 6vw, 80px); }
.intro-panel { display: grid; grid-template-columns: 1.1fr .9fr; gap: 34px; padding: clamp(26px, 4vw, 48px); border: 1px solid var(--border); border-radius: var(--radius-xl); background: #fff; box-shadow: var(--shadow-sm); }
.intro-stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.intro-stat { padding: 20px; border-radius: var(--radius-lg); background: var(--soft); }
.intro-stat strong { display: block; color: var(--primary-strong); font-size: 1.3rem; }
.intro-stat span { color: var(--muted); font-size: .9rem; }

.quick-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.quick-card, .feature-card, .step-card, .review-card {
    display: flex;
    flex-direction: column;
    min-width: 0;
    margin: 0;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: #fff;
    box-shadow: var(--shadow-sm);
}
.quick-card p, .feature-card p, .step-card p { margin-bottom: 12px; }
.quick-card .inline-link { margin-top: auto; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.feature-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.media-card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.media-card { min-width: 0; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-sm); }
.media-card figure { margin: 0; aspect-ratio: 16 / 9; padding: 14px; background: #f2fbff; }
.media-card figure img { width: 100%; height: 100%; object-fit: contain; border-radius: 12px; }
.media-card-body { display: flex; flex-direction: column; min-height: 250px; padding: 22px; }
.media-card-body p { margin-bottom: 12px; }

.split-layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr); gap: clamp(34px, 6vw, 80px); align-items: center; }
.split-layout.split-reverse .split-copy { order: 2; }
.split-layout.split-reverse .split-media { order: 1; }
.split-copy > p { font-size: 1.01rem; }
.check-list { display: grid; gap: 10px; margin: 24px 0 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 28px; color: #466076; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 1px; display: grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; background: var(--soft); color: var(--primary-strong); font-size: .75rem; font-weight: 900; }

.steps-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; padding: 0; list-style: none; }
.step-number { display: inline-flex; margin-bottom: 24px; color: var(--primary); font-size: 2.1rem; font-weight: 900; line-height: 1; }
.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.review-card p { flex: 1; color: #3e5c72; font-size: .98rem; }
.review-card footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 16px; border-top: 1px solid var(--border); }
.review-card strong { color: var(--deep); }
.review-card span { color: var(--muted); font-size: .84rem; }

.faq-list { display: grid; gap: 12px; }
.faq-list details { border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; box-shadow: 0 8px 24px rgba(18,125,188,.06); }
.faq-list summary { position: relative; padding: 20px 54px 20px 22px; color: var(--deep); font-weight: 800; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 22px; top: 50%; color: var(--primary-strong); font-size: 24px; transform: translateY(-50%); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: 0; padding: 0 22px 22px; }
.notice-panel { display: grid; grid-template-columns: .8fr 1.2fr; gap: 34px; padding: clamp(28px, 4vw, 46px); border: 1px solid rgba(16,174,234,.25); border-radius: var(--radius-xl); background: linear-gradient(135deg, #fff, #eaf8ff); box-shadow: var(--shadow-sm); }
.notice-panel h2 { margin-bottom: 0; }
.notice-copy p:last-child { margin-bottom: 0; }

.contact-panel { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.contact-card { padding: 26px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-sm); }
.contact-card .contact-icon { display: grid; place-items: center; width: 48px; height: 48px; margin-bottom: 18px; border-radius: 15px; background: var(--soft); color: var(--primary-strong); font-size: 1.25rem; font-weight: 900; }

.site-footer { padding-top: 60px; background: var(--footer); color: var(--footer-text); }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 44px; padding-bottom: 42px; }
.footer-brand img { width: 168px; height: auto; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 430px; margin: 18px 0 0; color: rgba(234,248,255,.76); }
.footer-links h2 { margin-bottom: 18px; color: #fff; font-size: 1rem; }
.footer-links { display: grid; align-content: start; gap: 9px; }
.footer-links a { color: rgba(234,248,255,.76); font-size: .92rem; }
.footer-links a:hover { color: #fff; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 0; border-top: 1px solid rgba(234,248,255,.15); }
.footer-bottom p { margin: 0; color: rgba(234,248,255,.68); font-size: .86rem; }
.footer-bottom div { display: flex; gap: 18px; white-space: nowrap; }
.footer-bottom a { color: rgba(234,248,255,.82); font-size: .86rem; }

@media (max-width: 1179px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: block; }
    .header-inner { gap: 12px; }
    .brand-logo { margin-right: auto; }
    .quick-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .media-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
    :root { --header-height: 72px; }
    .page-hero-grid, .intro-panel, .split-layout, .notice-panel { grid-template-columns: 1fr; }
    .page-hero-media { max-width: 700px; }
    .split-layout.split-reverse .split-copy, .split-layout.split-reverse .split-media { order: initial; }
    .quick-grid, .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .steps-grid, .review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .contact-panel { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1.4fr repeat(2, 1fr); }
    .footer-brand { grid-column: 1 / -1; }
    .hero-slider { aspect-ratio: 16 / 8; }
}

@media (max-width: 640px) {
    :root { --container: min(100% - 24px, 1360px); }
    body { font-size: 15px; }
    .section { padding: 48px 0; }
    .header-inner { width: min(100% - 20px, 1360px); }
    .brand-logo img { width: 122px; }
    .header-register { min-height: 40px; padding: 0 17px; font-size: .9rem; }
    .menu-toggle { width: 40px; height: 40px; padding: 8px; }
    .page-hero { padding-top: 48px; }
    .page-hero-grid { gap: 28px; }
    .hero-actions { gap: 12px; }
    .hero-slider-wrap { padding-top: 12px; }
    .hero-slider { width: min(100% - 20px, 1360px); aspect-ratio: 4 / 3; min-height: 250px; border-radius: 20px; }
    .slider-arrow { width: 40px; height: 40px; font-size: 24px; }
    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }
    .slider-dots { bottom: 11px; }
    .intro-panel { padding: 24px; }
    .intro-stat-grid { grid-template-columns: 1fr 1fr; }
    .quick-grid, .feature-grid, .feature-grid.two, .media-card-grid, .steps-grid, .review-grid { grid-template-columns: 1fr; }
    .quick-card, .feature-card, .step-card, .review-card { padding: 21px; }
    .media-card-body { min-height: auto; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-bottom { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 420px) {
    .header-register { padding: 0 14px; }
    .intro-stat-grid, .footer-grid { grid-template-columns: 1fr; }
    .footer-brand { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}