:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --primary: #11AEEA;
    --primary-strong: #1688D8;
    --deep: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(17, 174, 234, 0.18);
    --gradient: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 48px rgba(18, 106, 160, 0.12);
    --shadow-soft: 0 10px 30px rgba(18, 106, 160, 0.08);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --header-height: 76px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    color: var(--text);
    background: var(--bg);
    font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }

.skip-link {
    position: fixed;
    left: 16px;
    top: -60px;
    z-index: 2000;
    padding: 10px 16px;
    border-radius: 10px;
    color: #fff;
    background: var(--primary-strong);
    transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255, 255, 255, .96);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 6px 24px rgba(18, 106, 160, .06);
    backdrop-filter: blur(16px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    height: 100%;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: clamp(14px, 2vw, 28px);
}
.brand-logo, .drawer-logo, .footer-logo { flex: 0 0 auto; }
.brand-logo img { width: clamp(104px, 10vw, 142px); max-height: 48px; object-fit: contain; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(8px, 1vw, 18px);
}
.desktop-nav a {
    position: relative;
    flex: 0 0 auto;
    padding: 10px 0;
    color: #34546E;
    font-size: clamp(13px, .92vw, 15px);
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
    transition: color .2s ease;
}
.desktop-nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 2px;
    width: 0;
    height: 2px;
    border-radius: 999px;
    background: var(--gradient);
    transform: translateX(-50%);
    transition: width .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 { width: 100%; }
.header-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.main-btn, .outline-btn, .text-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    border-radius: 999px;
    font-weight: 800;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.main-btn {
    padding: 0 24px;
    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 { padding: 0 22px; color: var(--primary-strong); border: 1px solid var(--border); background: #fff; }
.outline-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-soft); }
.text-link { min-height: auto; color: var(--primary-strong); border-radius: 0; font-size: 14px; }
.text-link::after { content: "→"; }
.menu-toggle {
    display: none;
    width: 46px;
    height: 46px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--soft);
}
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 999px; background: var(--deep); }

.site-main { padding-top: var(--header-height); }
.container { width: min(100% - 32px, 1200px); margin-inline: auto; }
.wide-container { width: min(100% - 32px, 1360px); margin-inline: auto; }
.section { padding: clamp(56px, 7vw, 96px) 0; }
.section-tight { padding: clamp(40px, 5vw, 70px) 0; }
.section-soft { background: var(--soft); }
.section-white { background: #fff; }
.section-head { max-width: 760px; margin-bottom: 30px; }
.section-head.center { margin-inline: auto; text-align: center; }
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    color: var(--primary-strong);
    font-size: 14px;
    font-weight: 900;
    letter-spacing: .08em;
}
.eyebrow::before { content: ""; width: 22px; height: 3px; border-radius: 999px; background: var(--gradient); }
h1, h2, h3 { margin: 0 0 14px; color: var(--deep); line-height: 1.28; }
h1 { font-size: clamp(34px, 5vw, 62px); letter-spacing: -.035em; }
h2 { font-size: clamp(27px, 3.6vw, 42px); letter-spacing: -.02em; }
h3 { font-size: clamp(19px, 2.1vw, 24px); }
p { margin: 0 0 16px; }
.lead { color: var(--muted); font-size: clamp(16px, 1.8vw, 20px); line-height: 1.9; }
.muted { color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

.carousel-wrap { padding: 26px 0 0; }
.carousel {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: clamp(18px, 3vw, 32px);
    background: #dff6ff;
    box-shadow: var(--shadow);
}
.carousel-viewport { overflow: hidden; }
.carousel-track { display: flex; transition: transform .55s cubic-bezier(.22, .61, .36, 1); will-change: transform; }
.carousel-slide { flex: 0 0 100%; min-width: 0; }
.carousel-slide img { width: 100%; aspect-ratio: 1920 / 650; object-fit: contain; background: #e9f8ff; }
.carousel-arrow {
    position: absolute;
    top: 50%;
    z-index: 2;
    width: clamp(38px, 4vw, 52px);
    height: clamp(38px, 4vw, 52px);
    border: 1px solid rgba(255,255,255,.7);
    border-radius: 50%;
    color: var(--deep);
    background: rgba(255,255,255,.88);
    box-shadow: 0 8px 22px rgba(10, 80, 130, .16);
    transform: translateY(-50%);
}
.carousel-arrow:hover { background: #fff; }
.carousel-arrow.prev { left: clamp(10px, 2vw, 24px); }
.carousel-arrow.next { right: clamp(10px, 2vw, 24px); }
.carousel-dots { position: absolute; left: 50%; bottom: 14px; z-index: 2; display: flex; gap: 8px; transform: translateX(-50%); }
.carousel-dot { width: 9px; height: 9px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.7); box-shadow: 0 0 0 1px rgba(14,102,160,.18); }
.carousel-dot.is-active { width: 24px; border-radius: 999px; background: var(--primary-strong); }

.hero-content { padding: clamp(54px, 7vw, 90px) 0; }
.hero-grid, .split-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
    align-items: center;
    gap: clamp(30px, 6vw, 76px);
}
.hero-panel, .feature-panel, .notice-panel {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: #fff;
    box-shadow: var(--shadow-soft);
}
.hero-panel { padding: clamp(24px, 4vw, 44px); }
.hero-panel ul, .check-list { margin: 22px 0 0; padding: 0; list-style: none; }
.hero-panel li, .check-list li { position: relative; margin: 12px 0; padding-left: 28px; color: var(--muted); }
.hero-panel li::before, .check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--primary-strong); font-weight: 900; }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.card-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.info-card, .quick-card, .review-card, .faq-card, .service-card {
    min-width: 0;
    padding: clamp(22px, 3vw, 30px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--shadow-soft);
}
.info-card, .quick-card, .service-card { transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.info-card:hover, .quick-card:hover, .service-card:hover { transform: translateY(-5px); border-color: rgba(17,174,234,.34); box-shadow: var(--shadow); }
.card-kicker { color: var(--primary); font-size: 13px; font-weight: 900; letter-spacing: .08em; }
.info-card p, .quick-card p, .service-card p { color: var(--muted); }
.quick-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; }
.quick-card { display: flex; min-height: 240px; flex-direction: column; }
.quick-card .text-link { align-self: flex-start; margin-top: auto; }
.icon-badge {
    display: inline-flex;
    width: 48px;
    height: 48px;
    margin-bottom: 18px;
    align-items: center;
    justify-content: center;
    border-radius: 15px;
    color: #fff;
    background: var(--gradient);
    font-size: 18px;
    font-weight: 900;
    box-shadow: 0 10px 22px rgba(22, 136, 216, .22);
}
.media-card { overflow: hidden; padding: 0; }
.media-card .media { display: grid; place-items: center; min-height: 220px; padding: 18px; background: var(--soft); }
.media-card .media img { width: 100%; max-height: 300px; object-fit: contain; }
.media-card .body { padding: clamp(22px, 3vw, 32px); }

.page-hero { position: relative; overflow: hidden; padding: clamp(58px, 8vw, 104px) 0; background: linear-gradient(135deg, #e9f9ff 0%, #f8fdff 52%, #dff6ff 100%); }
.page-hero::before, .page-hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(2px); pointer-events: none; }
.page-hero::before { width: 320px; height: 320px; right: -120px; top: -150px; background: rgba(53,215,255,.18); }
.page-hero::after { width: 220px; height: 220px; left: -110px; bottom: -130px; background: rgba(22,136,216,.12); }
.page-hero .container { position: relative; z-index: 1; }
.page-hero .lead { max-width: 820px; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--primary-strong); }

.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 26px; align-items: start; }
.content-stack { display: grid; gap: 22px; }
.sticky-card { position: sticky; top: calc(var(--header-height) + 22px); }
.notice-panel { padding: clamp(24px, 4vw, 38px); background: linear-gradient(145deg, #fff 0%, #eefaff 100%); }
.notice-panel strong { color: var(--deep); }
.notice-list { margin: 18px 0 0; padding-left: 20px; color: var(--muted); }
.notice-list li { margin: 8px 0; }

.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.review-card blockquote { margin: 0 0 18px; color: var(--text); }
.review-card .reviewer { display: flex; align-items: center; gap: 12px; color: var(--deep); font-weight: 800; }
.review-card .reviewer::before { content: ""; width: 34px; height: 34px; border-radius: 50%; background: var(--gradient); opacity: .88; }
.review-card small { display: block; margin-top: 4px; color: var(--muted); font-weight: 400; }

.faq-list { display: grid; gap: 14px; }
details.faq-item { border: 1px solid var(--border); border-radius: 16px; background: #fff; box-shadow: var(--shadow-soft); }
details.faq-item summary { position: relative; padding: 20px 54px 20px 22px; color: var(--deep); font-weight: 900; cursor: pointer; list-style: none; }
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after { content: "+"; position: absolute; right: 20px; top: 50%; color: var(--primary-strong); font-size: 24px; transform: translateY(-50%); }
details.faq-item[open] summary::after { content: "−"; }
details.faq-item p { padding: 0 22px 22px; color: var(--muted); }

.tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.tag { display: inline-flex; padding: 7px 12px; border: 1px solid var(--border); border-radius: 999px; color: var(--primary-strong); background: var(--soft); font-size: 13px; font-weight: 800; }
.steps { counter-reset: step; display: grid; gap: 16px; }
.step { position: relative; padding: 24px 24px 24px 72px; border: 1px solid var(--border); border-radius: 18px; background: #fff; }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 22px; top: 24px; display: grid; width: 34px; height: 34px; place-items: center; border-radius: 50%; color: #fff; background: var(--gradient); font-weight: 900; }
.step p { color: var(--muted); }

.site-footer { color: var(--footer-text); background: var(--footer); }
.footer-inner { width: min(100% - 32px, 1200px); margin-inline: auto; display: grid; grid-template-columns: 1.2fr 1.8fr; gap: 56px; padding: 66px 0 46px; }
.footer-logo img { width: 138px; max-height: 52px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 470px; margin-top: 22px; 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: 16px; color: #fff; font-size: 17px; }
.footer-links a { display: block; margin: 10px 0; color: rgba(234,248,255,.78); font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-notice { border-top: 1px solid rgba(234,248,255,.12); padding: 22px 16px 30px; text-align: center; }
.footer-notice p { max-width: 1050px; margin: 0 auto 8px; color: rgba(234,248,255,.7); font-size: 13px; }

.drawer-backdrop { position: fixed; inset: 0; z-index: 1200; opacity: 0; background: rgba(5, 46, 80, .42); backdrop-filter: blur(3px); transition: opacity .25s ease; }
.drawer-backdrop.is-visible { opacity: 1; }
.mobile-drawer { position: fixed; z-index: 1300; inset: 0 0 0 auto; width: min(88vw, 380px); padding: 18px; overflow-y: auto; background: #fff; box-shadow: -20px 0 60px rgba(7,58,104,.22); transform: translateX(105%); transition: transform .3s ease; }
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.drawer-logo img { width: 126px; max-height: 48px; object-fit: contain; }
.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; padding: 14px 0; }
.mobile-nav a { display: flex; align-items: center; justify-content: space-between; padding: 13px 10px; border-bottom: 1px solid rgba(17,174,234,.1); color: var(--text); font-weight: 700; }
.mobile-nav a.is-active { color: var(--primary-strong); }
.mobile-nav a span { color: var(--primary); font-size: 22px; }
.drawer-register { width: 100%; margin-top: 8px; }

@media (max-width: 1179px) {
    .desktop-nav { display: none; }
    .header-inner { justify-content: space-between; }
    .menu-toggle { display: block; }
}
@media (max-width: 980px) {
    .quick-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .card-grid.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .hero-grid, .split-grid, .content-grid { grid-template-columns: 1fr; }
    .sticky-card { position: static; }
    .footer-inner { grid-template-columns: 1fr; gap: 34px; }
}
@media (max-width: 760px) {
    :root { --header-height: 68px; }
    .header-inner { width: min(100% - 22px, 1360px); }
    .brand-logo img { width: 108px; }
    .header-actions .main-btn { min-height: 40px; padding: 0 18px; }
    .menu-toggle { width: 42px; height: 42px; }
    .container, .wide-container { width: min(100% - 24px, 1200px); }
    .carousel-wrap { padding-top: 16px; }
    .carousel-slide img { aspect-ratio: 16 / 7; }
    .carousel-arrow { width: 38px; height: 38px; }
    .carousel-dots { bottom: 8px; }
    .card-grid, .card-grid.two, .review-grid { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
    .header-actions { gap: 7px; }
    .header-actions .main-btn { padding: 0 14px; font-size: 14px; }
    .quick-grid, .card-grid.four { grid-template-columns: 1fr; }
    .quick-card { min-height: auto; }
    .footer-links { grid-template-columns: 1fr; }
    .carousel-arrow { top: auto; bottom: 10px; transform: none; }
    .carousel-arrow.prev { left: 10px; }
    .carousel-arrow.next { right: 10px; }
    .carousel-dots { bottom: 21px; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}