:root {
    --page-bg: #F4FBFF;
    --header-bg: #FFFFFF;
    --soft-blue: #E8F7FF;
    --card-bg: #FFFFFF;
    --cyan: #11AEEA;
    --blue: #1688D8;
    --deep-blue: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(17, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --gradient: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    --shadow: 0 18px 50px rgba(21, 90, 157, 0.10);
    --shadow-soft: 0 10px 30px rgba(21, 90, 157, 0.08);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --container: min(100% - 32px, 1360px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    background: var(--page-bg);
    color: var(--text);
    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%; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
.skip-link {
    position: fixed;
    left: 16px;
    top: -70px;
    z-index: 2000;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--deep-blue);
    color: #fff;
    transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    background: rgba(255, 255, 255, .96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
    box-shadow: 0 6px 24px rgba(21, 90, 157, .06);
}
.header-inner {
    width: var(--container);
    min-height: 76px;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: clamp(12px, 2vw, 28px);
}
.brand-logo { flex: 0 0 auto; width: clamp(108px, 10vw, 150px); }
.brand-logo img { width: 100%; height: 46px; object-fit: contain; }
.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(7px, 1.15vw, 18px);
    white-space: nowrap;
}
.desktop-nav a {
    position: relative;
    flex: 0 0 auto;
    padding: 26px 0 22px;
    color: var(--text);
    font-size: clamp(13px, .95vw, 15px);
    font-weight: 650;
    transition: color .2s ease;
}
.desktop-nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 16px;
    width: 0;
    height: 3px;
    border-radius: 999px;
    background: var(--gradient);
    transform: translateX(-50%);
    transition: width .2s ease;
}
.desktop-nav a:hover, .desktop-nav a.is-active { color: var(--blue); }
.desktop-nav a:hover::after, .desktop-nav a.is-active::after { width: 100%; }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.main-btn, .secondary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 22px;
    border-radius: 999px;
    font-weight: 750;
    white-space: nowrap;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.main-btn { color: #fff; background: var(--gradient); box-shadow: 0 10px 24px rgba(22, 136, 216, .22); }
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(22, 136, 216, .28); }
.secondary-btn { color: var(--blue); background: #fff; border: 1px solid var(--border); }
.secondary-btn:hover { transform: translateY(-2px); background: var(--soft-blue); }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 13px;
    background: #fff;
}
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 99px; background: var(--deep-blue); }
.mobile-drawer {
    position: fixed;
    z-index: 1200;
    inset: 0 0 0 auto;
    width: min(88vw, 380px);
    padding: 22px;
    overflow-y: auto;
    background: #fff;
    box-shadow: -20px 0 50px rgba(7, 58, 104, .18);
    transform: translateX(105%);
    transition: transform .28s ease;
}
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-overlay { position: fixed; z-index: 1100; inset: 0; background: rgba(7, 58, 104, .44); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.drawer-logo { width: 132px; }
.drawer-logo img { width: 100%; height: 44px; object-fit: contain; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 12px; background: var(--soft-blue); color: var(--deep-blue); font-size: 28px; line-height: 1; }
.drawer-nav { display: grid; gap: 5px; padding: 18px 0; }
.drawer-nav a { padding: 11px 14px; border-radius: 11px; color: var(--text); font-weight: 650; }
.drawer-nav a:hover, .drawer-nav a.is-active { color: var(--blue); background: var(--soft-blue); }
.drawer-register { width: 100%; }

main { padding-top: 76px; }
.container { width: var(--container); margin-inline: auto; }
.section { padding: clamp(56px, 7vw, 96px) 0; }
.section-sm { padding: clamp(38px, 5vw, 64px) 0; }
.section-soft { background: var(--soft-blue); }
.section-title { max-width: 790px; margin: 0 auto 36px; text-align: center; }
.section-title.align-left { margin-left: 0; text-align: left; }
.eyebrow { display: inline-block; margin-bottom: 10px; color: var(--blue); font-size: 14px; font-weight: 800; letter-spacing: .08em; }
h1, h2, h3 { margin: 0 0 16px; color: var(--deep-blue); line-height: 1.3; }
h1 { font-size: clamp(34px, 5vw, 62px); }
h2 { font-size: clamp(27px, 3.5vw, 42px); }
h3 { font-size: clamp(19px, 2vw, 24px); }
p { margin: 0 0 16px; }
.lead { color: var(--muted); font-size: clamp(17px, 1.4vw, 20px); }
.text-muted { color: var(--muted); }
.text-link { color: var(--blue); font-weight: 750; }
.text-link:hover { text-decoration: underline; }

.hero-inner {
    padding: clamp(52px, 8vw, 104px) 0;
    background:
        radial-gradient(circle at 10% 10%, rgba(53, 215, 255, .22), transparent 34%),
        radial-gradient(circle at 90% 30%, rgba(22, 136, 216, .15), transparent 32%);
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr); align-items: center; gap: clamp(28px, 6vw, 76px); }
.hero-copy p { max-width: 720px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-media, .content-media {
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, .82);
    box-shadow: var(--shadow);
}
.hero-media img, .content-media img { width: 100%; max-height: 480px; border-radius: calc(var(--radius-lg) - 10px); object-fit: contain; }

.carousel-wrap { padding: 28px 0 0; }
.carousel {
    position: relative;
    width: var(--container);
    margin-inline: auto;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--soft-blue);
    box-shadow: var(--shadow);
}
.carousel-track { display: flex; transition: transform .55s ease; }
.carousel-slide { flex: 0 0 100%; min-width: 0; }
.carousel-slide img { width: 100%; height: clamp(220px, 43vw, 600px); object-fit: contain; background: var(--soft-blue); }
.carousel-arrow {
    position: absolute;
    z-index: 3;
    top: 50%;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(255,255,255,.75);
    border-radius: 50%;
    background: rgba(7, 58, 104, .58);
    color: #fff;
    font-size: 28px;
    transform: translateY(-50%);
    backdrop-filter: blur(8px);
}
.carousel-arrow:hover { background: rgba(7, 58, 104, .78); }
.carousel-prev { left: 18px; }
.carousel-next { right: 18px; }
.carousel-dots { position: absolute; z-index: 3; left: 50%; bottom: 16px; display: flex; gap: 9px; transform: translateX(-50%); }
.carousel-dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.62); box-shadow: 0 0 0 1px rgba(7,58,104,.16); }
.carousel-dot.is-active { width: 28px; border-radius: 99px; background: #fff; }

.grid-2, .grid-3, .grid-4, .grid-5 { 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)); }
.grid-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.card {
    min-width: 0;
    padding: clamp(22px, 2.6vw, 32px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--card-bg);
    box-shadow: var(--shadow-soft);
}
.card p:last-child { margin-bottom: 0; }
.card-topline { width: 44px; height: 5px; margin-bottom: 18px; border-radius: 99px; background: var(--gradient); }
.feature-card { display: flex; flex-direction: column; height: 100%; }
.feature-card .text-link { margin-top: auto; padding-top: 12px; }
.media-card { overflow: hidden; padding: 0; }
.media-card img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; background: var(--soft-blue); }
.media-card-body { padding: 24px; }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .9fr); gap: clamp(28px, 6vw, 72px); align-items: center; }
.split.reverse .content-media { order: -1; }
.check-list, .notice-list, .footer-grid ul { margin: 0; padding: 0; list-style: none; }
.check-list { display: grid; gap: 13px; }
.check-list li { position: relative; padding-left: 30px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--cyan); font-weight: 900; }
.number-list { counter-reset: step; display: grid; gap: 18px; }
.number-item { position: relative; padding: 23px 23px 23px 76px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; }
.number-item::before { counter-increment: step; content: counter(step); position: absolute; left: 22px; top: 22px; width: 36px; height: 36px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--gradient); font-weight: 850; }
.review-card { position: relative; }
.review-card::before { content: "“"; position: absolute; right: 22px; top: 5px; color: rgba(17,174,234,.18); font-size: 78px; font-weight: 900; line-height: 1; }
.review-author { margin-top: 18px; color: var(--blue); font-weight: 800; }
.notice-box { padding: 26px; border: 1px solid var(--border); border-left: 5px solid var(--cyan); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-soft); }
.notice-box strong { color: var(--deep-blue); }
.badge-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0; }
.badge { padding: 7px 13px; border-radius: 999px; color: var(--blue); background: var(--soft-blue); font-size: 14px; font-weight: 750; }
.cta-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: clamp(28px, 5vw, 50px); border-radius: var(--radius-lg); color: #fff; background: linear-gradient(135deg, #11AEEA, #155A9D); box-shadow: var(--shadow); }
.cta-band h2, .cta-band p { color: #fff; }
.cta-band p { max-width: 760px; margin-bottom: 0; opacity: .9; }
.cta-band .main-btn { background: #fff; color: var(--blue); box-shadow: none; }
.faq-list { display: grid; gap: 14px; }
details { border: 1px solid var(--border); border-radius: var(--radius-sm); background: #fff; box-shadow: var(--shadow-soft); }
summary { position: relative; padding: 20px 56px 20px 22px; cursor: pointer; color: var(--deep-blue); font-weight: 800; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 22px; top: 50%; color: var(--blue); font-size: 25px; transform: translateY(-50%); }
details[open] summary::after { content: "−"; }
.faq-answer { padding: 0 22px 22px; color: var(--muted); }

.site-footer { padding: 62px 0 24px; color: var(--footer-text); background: var(--footer); }
.footer-grid { width: var(--container); margin-inline: auto; display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 42px; }
.footer-logo { display: inline-block; width: 148px; padding: 8px 12px; border-radius: 12px; background: #fff; }
.footer-logo img { width: 100%; height: 44px; object-fit: contain; }
.footer-brand p { max-width: 520px; margin-top: 18px; color: rgba(234,248,255,.82); }
.site-footer h2 { color: #fff; font-size: 18px; }
.footer-grid ul { display: grid; gap: 9px; }
.footer-grid a { color: rgba(234,248,255,.82); }
.footer-grid a:hover { color: #fff; }
.footer-notice { width: var(--container); margin: 42px auto 0; padding-top: 24px; border-top: 1px solid rgba(234,248,255,.15); color: rgba(234,248,255,.72); font-size: 14px; text-align: center; }
.footer-notice p { margin-bottom: 8px; }

.contact-form { display: grid; gap: 16px; }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.contact-form label { display: grid; gap: 7px; color: var(--deep-blue); font-weight: 700; }
.contact-form input, .contact-form textarea, .contact-form select { width: 100%; padding: 13px 15px; border: 1px solid var(--border); border-radius: 12px; background: #fff; color: var(--text); outline: 0; }
.contact-form textarea { min-height: 150px; resize: vertical; }
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus { border-color: var(--cyan); box-shadow: 0 0 0 4px rgba(17,174,234,.10); }

@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: block; }
    .header-inner { min-height: 70px; }
    main { padding-top: 70px; }
    .brand-logo { margin-right: auto; }
}
@media (max-width: 980px) {
    .grid-5 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .hero-grid, .split { grid-template-columns: 1fr; }
    .split.reverse .content-media { order: 0; }
    .hero-copy { text-align: center; }
    .hero-copy p { margin-inline: auto; }
    .hero-actions, .badge-row { justify-content: center; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 680px) {
    :root { --container: min(100% - 24px, 1360px); }
    .header-inner { gap: 8px; }
    .brand-logo { width: 104px; }
    .brand-logo img { height: 40px; }
    .header-actions .main-btn { min-height: 40px; padding-inline: 17px; }
    .menu-toggle { width: 40px; height: 40px; }
    .carousel-wrap { padding-top: 16px; }
    .carousel { border-radius: 18px; }
    .carousel-slide img { height: clamp(190px, 58vw, 320px); }
    .carousel-arrow { width: 38px; height: 38px; font-size: 22px; }
    .carousel-prev { left: 10px; }
    .carousel-next { right: 10px; }
    .carousel-dots { bottom: 10px; }
    .grid-2, .grid-3, .grid-4, .grid-5, .form-row { grid-template-columns: 1fr; }
    .cta-band { align-items: flex-start; flex-direction: column; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .number-item { padding-left: 68px; }
}