:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #E8F7FF;
    --primary: #10AEEA;
    --primary-strong: #1688D8;
    --deep-blue: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(16, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 45px rgba(21, 90, 157, 0.10);
    --shadow-soft: 0 10px 28px rgba(21, 90, 157, 0.08);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --header-height: 78px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    padding-top: var(--header-height);
    min-width: 320px;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
    line-height: 1.75;
    text-rendering: optimizeLegibility;
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
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;
    background: var(--deep-blue);
    color: #fff;
    transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255,255,255,.96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: clamp(12px, 1.6vw, 24px);
}
.brand-logo, .drawer-logo, .footer-logo { display: inline-flex; align-items: center; }
.brand-logo { flex: 0 0 auto; width: clamp(112px, 10vw, 145px); }
.brand-logo img, .drawer-logo img, .footer-logo img { width: 100%; height: auto; object-fit: contain; }
.desktop-nav {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(7px, .75vw, 14px);
    white-space: nowrap;
}
.desktop-nav a {
    position: relative;
    flex: 0 0 auto;
    padding: 10px 0;
    color: var(--text);
    font-size: clamp(12px, .88vw, 14px);
    font-weight: 700;
    transition: color .2s ease;
}
.desktop-nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    right: 50%;
    bottom: 4px;
    height: 2px;
    border-radius: 999px;
    background: var(--primary);
    transition: left .2s ease, right .2s ease;
}
.desktop-nav a:hover, .desktop-nav a.active { color: var(--primary-strong); }
.desktop-nav a:hover::after, .desktop-nav a.active::after { left: 0; right: 0; }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.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: 10px 24px;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    color: #fff;
    box-shadow: 0 10px 24px rgba(22,136,216,.22);
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(22,136,216,.30); }
.outline-btn { padding: 9px 22px; border: 1px solid var(--primary); color: var(--primary-strong); background: #fff; }
.outline-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-soft); }
.text-link { min-height: auto; color: var(--primary-strong); font-weight: 800; }
.text-link::after { content: "→"; }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 11px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface-soft);
}
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 99px; background: var(--deep-blue); }
.drawer-overlay { position: fixed; inset: 0; z-index: 1200; background: rgba(3,36,66,.48); }
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1300;
    width: min(88vw, 390px);
    height: 100dvh;
    padding: 18px;
    overflow-y: auto;
    transform: translateX(105%);
    background: #fff;
    box-shadow: -24px 0 50px rgba(7,58,104,.18);
    transition: transform .28s ease;
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.drawer-logo { width: 126px; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 12px; background: var(--surface-soft); color: var(--deep-blue); font-size: 28px; line-height: 1; }
.mobile-nav { display: grid; gap: 4px; padding: 16px 0; }
.mobile-nav a { display: flex; align-items: center; justify-content: space-between; padding: 11px 12px; border-radius: 12px; font-weight: 700; }
.mobile-nav a:hover, .mobile-nav a.active { background: var(--surface-soft); color: var(--primary-strong); }
.drawer-register { width: 100%; }

main { min-height: 60vh; }
.container { width: min(100% - 32px, 1180px); margin-inline: auto; }
.wide-container { width: min(100% - 32px, 1360px); margin-inline: auto; }
.section { padding: clamp(54px, 7vw, 96px) 0; }
.section.compact { padding: clamp(38px, 5vw, 66px) 0; }
.section-soft { background: var(--surface-soft); }
.section-white { background: #fff; }
.section-header { max-width: 790px; margin: 0 auto 34px; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 10px; color: var(--primary-strong); font-size: 14px; font-weight: 800; letter-spacing: .08em; }
.eyebrow::before { content: ""; width: 24px; height: 3px; border-radius: 99px; background: var(--primary); }
h1, h2, h3 { margin: 0 0 14px; color: var(--deep-blue); line-height: 1.28; }
h1 { font-size: clamp(34px, 5vw, 64px); }
h2 { font-size: clamp(26px, 3.4vw, 42px); }
h3 { font-size: clamp(19px, 2vw, 24px); }
p { margin: 0 0 16px; }
.lead { font-size: clamp(17px, 2vw, 20px); color: var(--muted); }
.muted { color: var(--muted); }
.center { text-align: center; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.actions.centered { justify-content: center; }

.slider-section { padding: 24px 0 0; }
.hero-slider {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface-soft);
    box-shadow: var(--shadow);
    aspect-ratio: 16 / 6.2;
    min-height: 250px;
}
.slides { position: relative; width: 100%; height: 100%; }
.slide { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .55s ease; }
.slide.active { opacity: 1; pointer-events: auto; }
.slide img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.slider-arrow {
    position: absolute;
    top: 50%;
    z-index: 5;
    width: 46px;
    height: 46px;
    transform: translateY(-50%);
    border: 1px solid rgba(255,255,255,.65);
    border-radius: 50%;
    background: rgba(7,58,104,.58);
    color: #fff;
    font-size: 24px;
    line-height: 1;
}
.slider-arrow:hover { background: rgba(7,58,104,.82); }
.slider-prev { left: 16px; }
.slider-next { right: 16px; }
.slider-dots { position: absolute; left: 50%; bottom: 14px; z-index: 5; display: flex; gap: 8px; transform: translateX(-50%); }
.slider-dot { width: 10px; height: 10px; padding: 0; border: 1px solid rgba(255,255,255,.9); border-radius: 50%; background: rgba(7,58,104,.35); }
.slider-dot.active { width: 28px; border-radius: 999px; background: #fff; }

.intro-hero, .page-hero {
    position: relative;
    overflow: hidden;
    padding: clamp(58px, 8vw, 110px) 0;
    background:
        radial-gradient(circle at 15% 20%, rgba(53,215,255,.26), transparent 32%),
        radial-gradient(circle at 85% 18%, rgba(22,136,216,.18), transparent 28%),
        linear-gradient(180deg, #fff 0%, #F4FBFF 100%);
}
.intro-hero::after, .page-hero::after { content: ""; position: absolute; right: -80px; bottom: -120px; width: 340px; height: 340px; border: 55px solid rgba(16,174,234,.08); border-radius: 50%; }
.hero-content { position: relative; z-index: 1; max-width: 820px; }
.hero-content.centered { margin: 0 auto; text-align: center; }
.hero-content.centered .actions { justify-content: center; }

.two-column { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr); gap: clamp(28px, 5vw, 66px); align-items: center; }
.two-column.reverse .media-card { order: -1; }
.media-card { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-soft); }
.media-card img { width: 100%; max-height: 520px; object-fit: contain; background: #fff; }
.content-card { padding: clamp(24px, 4vw, 42px); border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-soft); }

.grid { 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 { padding: 26px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-soft); }
.card h3 { margin-bottom: 10px; }
.card > .media-card { margin: -6px -6px 20px; }
.card p:last-child { margin-bottom: 0; }
.category-card { display: flex; flex-direction: column; min-height: 250px; }
.category-card .text-link { margin-top: auto; align-self: flex-start; }
.number-badge, .icon-badge { display: inline-grid; place-items: center; width: 46px; height: 46px; margin-bottom: 18px; border-radius: 15px; background: linear-gradient(135deg, rgba(53,215,255,.22), rgba(22,136,216,.12)); color: var(--primary-strong); font-weight: 900; }
.tag-list { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; }
.tag { padding: 6px 12px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface-soft); color: var(--deep-blue); font-size: 14px; font-weight: 700; }
.check-list { display: grid; gap: 12px; padding: 0; margin: 22px 0 0; list-style: none; }
.check-list li { position: relative; padding-left: 30px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--surface-soft); color: var(--primary-strong); font-weight: 900; }

.feature-band { padding: 28px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: linear-gradient(135deg, #fff, #E8F7FF); box-shadow: var(--shadow-soft); }
.feature-band .grid { align-items: center; }
.stat { text-align: center; }
.stat strong { display: block; color: var(--primary-strong); font-size: clamp(26px, 3.5vw, 42px); line-height: 1.1; }
.stat span { color: var(--muted); font-size: 14px; }

.review-card { position: relative; margin: 0; padding-top: 32px; }
.review-card::before { content: "“"; position: absolute; left: 22px; top: 4px; color: rgba(16,174,234,.22); font-size: 58px; font-family: Georgia, serif; line-height: 1; }
.review-card cite { display: block; margin-top: 16px; color: var(--primary-strong); font-style: normal; font-weight: 800; }

.notice-box { padding: clamp(26px, 4vw, 42px); border: 1px solid var(--border); border-radius: var(--radius-lg); background: linear-gradient(135deg, #E8F7FF, #fff); }
.notice-box h2, .notice-box h3 { color: var(--deep-blue); }
.notice-box p:last-child { margin-bottom: 0; }

.faq-list { display: grid; gap: 14px; }
.faq-list details { border: 1px solid var(--border); border-radius: var(--radius-sm); background: #fff; box-shadow: var(--shadow-soft); }
.faq-list summary { position: relative; padding: 20px 54px 20px 22px; cursor: pointer; color: var(--deep-blue); font-weight: 800; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%); color: var(--primary-strong); font-size: 24px; }
.faq-list details[open] summary::after { content: "−"; }
.faq-answer { padding: 0 22px 22px; color: var(--muted); }

.link-panel { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 26px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; }
.link-panel + .link-panel { margin-top: 16px; }
.contact-form { display: grid; gap: 16px; }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.form-field { display: grid; gap: 7px; }
.form-field label { color: var(--deep-blue); font-weight: 800; }
.form-field input, .form-field textarea, .form-field select { width: 100%; border: 1px solid var(--border); border-radius: 12px; padding: 13px 14px; background: #fff; color: var(--text); outline: none; }
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(16,174,234,.10); }
.form-field textarea { min-height: 150px; resize: vertical; }

.site-footer { background: var(--footer); color: var(--footer-text); }
.footer-inner { width: min(100% - 32px, 1180px); margin: 0 auto; display: grid; grid-template-columns: 1.25fr .9fr 1fr; gap: 44px; padding: 58px 0 38px; }
.footer-logo { width: 138px; margin-bottom: 18px; padding: 8px 12px; border-radius: 14px; background: #fff; }
.footer-inner h2 { color: #fff; font-size: 19px; }
.footer-inner p { color: rgba(234,248,255,.82); }
.footer-links div { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 8px 18px; }
.footer-links a { color: rgba(234,248,255,.86); }
.footer-links a:hover { color: #fff; }
.footer-bottom { width: min(100% - 32px, 1180px); margin: 0 auto; display: flex; justify-content: space-between; gap: 20px; padding: 20px 0 28px; border-top: 1px solid rgba(234,248,255,.15); color: rgba(234,248,255,.72); font-size: 14px; }
.footer-bottom p { margin: 0; }

@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: block; }
    .brand-logo { margin-right: auto; }
}
@media (max-width: 920px) {
    .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .grid-3 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .two-column, .two-column.reverse { grid-template-columns: 1fr; }
    .two-column.reverse .media-card { order: 0; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .hero-slider { aspect-ratio: 16 / 8; }
}
@media (max-width: 680px) {
    :root { --header-height: 68px; }
    .header-inner, .container, .wide-container, .footer-inner, .footer-bottom { width: min(100% - 24px, 1180px); }
    .brand-logo { width: 108px; }
    .main-btn { padding: 9px 18px; min-height: 42px; }
    .header-actions { gap: 7px; }
    .menu-toggle { width: 42px; height: 42px; }
    .slider-section { padding-top: 12px; }
    .hero-slider { min-height: 220px; aspect-ratio: 4 / 3; border-radius: 20px; }
    .slider-arrow { width: 40px; height: 40px; }
    .slider-prev { left: 9px; }
    .slider-next { right: 9px; }
    .section { padding: 52px 0; }
    .grid-2, .grid-3, .grid-4, .form-row { grid-template-columns: 1fr; }
    .card, .content-card { padding: 22px; }
    .category-card { min-height: auto; }
    .footer-inner { grid-template-columns: 1fr; gap: 28px; }
    .footer-brand { grid-column: auto; }
    .footer-bottom { flex-direction: column; gap: 8px; }
    .link-panel { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}