:root {
    --page-bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --title: #11AEEA;
    --blue: #1688D8;
    --deep: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(17, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 45px rgba(21, 90, 157, 0.12);
    --shadow-soft: 0 10px 28px rgba(21, 90, 157, 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;
    overflow-x: hidden;
    background: var(--page-bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, 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, select { font: inherit; }
button { cursor: pointer; }
.shell { width: min(100% - 32px, 1220px); margin-inline: auto; }
.skip-link {
    position: fixed;
    left: 16px;
    top: -80px;
    z-index: 9999;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--footer);
    color: #fff;
}
.skip-link:focus { top: 12px; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(16px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    height: 100%;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: clamp(12px, 1.8vw, 28px);
}
.brand-logo { flex: 0 0 auto; display: inline-flex; align-items: center; }
.brand-logo img { width: clamp(106px, 9vw, 132px); height: 44px; object-fit: contain; }
.desktop-nav {
    min-width: 0;
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: clamp(8px, 1vw, 18px);
    overflow: hidden;
}
.nav-link {
    position: relative;
    flex: 0 0 auto;
    white-space: nowrap;
    color: var(--muted);
    font-size: clamp(13px, 0.92vw, 15px);
    font-weight: 600;
    transition: color .2s ease, background .2s ease;
}
.desktop-nav .nav-link { padding: 9px 2px; }
.nav-link:hover, .nav-link.is-active { color: var(--blue); }
.desktop-nav .nav-link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 2px;
    width: 0;
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    transform: translateX(-50%);
    transition: width .2s ease;
}
.desktop-nav .nav-link:hover::after, .desktop-nav .nav-link.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: 10px 22px;
    border-radius: 999px;
    font-weight: 700;
    line-height: 1;
    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, 0.22);
}
.secondary-btn { color: var(--blue); background: var(--soft); 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: var(--surface);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}
.menu-toggle span { width: 20px; height: 2px; border-radius: 2px; background: var(--deep); }
.drawer-overlay { position: fixed; inset: 0; z-index: 1100; background: rgba(7, 58, 104, .36); }
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1200;
    width: min(88vw, 390px);
    height: 100dvh;
    padding: 18px;
    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-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.drawer-logo img { width: 118px; height: 42px; object-fit: contain; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 12px; background: var(--soft); color: var(--deep); font-size: 28px; line-height: 1; }
.drawer-nav { display: grid; gap: 6px; padding: 18px 0; }
.drawer-nav .nav-link { padding: 12px 14px; border-radius: 12px; }
.drawer-nav .nav-link:hover, .drawer-nav .nav-link.is-active { background: var(--soft); }
.drawer-register { width: 100%; }

main { min-height: 60vh; }
.section { padding: clamp(58px, 7vw, 96px) 0; }
.section-tight { padding: clamp(42px, 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: 12px;
    color: var(--blue);
    font-size: 14px;
    font-weight: 800;
    letter-spacing: .08em;
}
.eyebrow::before { content: ""; width: 28px; height: 3px; border-radius: 99px; background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%); }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: var(--deep); line-height: 1.28; }
h1 { margin-bottom: 18px; font-size: clamp(32px, 5vw, 58px); letter-spacing: -.025em; }
h2 { margin-bottom: 14px; font-size: clamp(26px, 3.6vw, 40px); }
h3 { margin-bottom: 10px; font-size: clamp(18px, 2vw, 23px); }
p { margin-bottom: 16px; color: var(--muted); }
.lead { max-width: 820px; color: var(--text); font-size: clamp(17px, 2vw, 21px); }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--blue); font-weight: 700; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

.hero-slider-wrap { padding: 22px 0 0; }
.hero-slider {
    position: relative;
    width: min(100% - 32px, 1360px);
    margin-inline: auto;
    overflow: hidden;
    aspect-ratio: 16 / 6.6;
    min-height: 280px;
    border: 1px solid var(--border);
    border-radius: clamp(18px, 3vw, 32px);
    background: linear-gradient(145deg, #E8F7FF, #FFFFFF);
    box-shadow: var(--shadow);
}
.slides, .slide { position: absolute; inset: 0; }
.slide { opacity: 0; visibility: hidden; transition: opacity .7s ease; }
.slide.is-active { opacity: 1; visibility: visible; }
.slide img { width: 100%; height: 100%; object-fit: contain; }
.slider-arrow {
    position: absolute;
    top: 50%;
    z-index: 3;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(255,255,255,.8);
    border-radius: 50%;
    color: var(--deep);
    background: rgba(255,255,255,.86);
    box-shadow: 0 8px 22px rgba(7,58,104,.16);
    transform: translateY(-50%);
    font-size: 24px;
}
.slider-arrow.prev { left: 18px; }
.slider-arrow.next { right: 18px; }
.slider-dots { position: absolute; left: 50%; bottom: 16px; z-index: 3; display: flex; gap: 8px; transform: translateX(-50%); }
.slider-dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 999px; background: rgba(255,255,255,.72); box-shadow: 0 1px 4px rgba(0,0,0,.16); transition: width .2s ease, background .2s ease; }
.slider-dot.is-active { width: 28px; background: var(--blue); }

.home-intro { padding: clamp(44px, 6vw, 78px) 0; }
.home-intro-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr); gap: 26px; align-items: stretch; }
.intro-panel, .stat-panel, .page-hero-card, .content-card, .review-card, .faq-item, .notice-panel {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--shadow-soft);
}
.intro-panel { padding: clamp(28px, 4vw, 48px); }
.stat-panel { padding: 28px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; background: linear-gradient(145deg, #E8F7FF, #FFFFFF); }
.stat-item { padding: 18px; border-radius: 16px; background: rgba(255,255,255,.8); }
.stat-item strong { display: block; margin-bottom: 3px; color: var(--blue); font-size: 24px; }
.stat-item span { color: var(--muted); font-size: 14px; }

.grid-2, .grid-3, .grid-4, .quick-grid, .review-grid, .footer-grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3, .review-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4, .quick-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.content-card { padding: 26px; }
.content-card .number { display: inline-flex; width: 40px; height: 40px; margin-bottom: 16px; border-radius: 13px; align-items: center; justify-content: center; color: #fff; font-weight: 800; background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%); }
.quick-card { min-height: 220px; display: flex; flex-direction: column; }
.quick-card .text-link { margin-top: auto; }
.media-block { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .9fr); gap: clamp(24px, 5vw, 64px); align-items: center; }
.media-block.reverse { grid-template-columns: minmax(320px, .9fr) minmax(0, 1fr); }
.media-block.reverse .media-copy { order: 2; }
.media-block.reverse .media-frame { order: 1; }
.media-frame {
    min-height: 320px;
    padding: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #E8F7FF, #FFFFFF);
    box-shadow: var(--shadow);
}
.media-frame img { width: 100%; max-height: 500px; object-fit: contain; }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 0; padding: 0; list-style: none; }
.tag-list li { padding: 8px 13px; border: 1px solid var(--border); border-radius: 999px; color: var(--deep); background: var(--soft); font-size: 14px; font-weight: 700; }

.page-hero { padding: clamp(54px, 7vw, 94px) 0 44px; }
.page-hero-card { position: relative; overflow: hidden; padding: clamp(34px, 6vw, 68px); background: linear-gradient(135deg, #FFFFFF 0%, #E8F7FF 100%); }
.page-hero-card::after { content: ""; position: absolute; width: 260px; height: 260px; right: -90px; top: -100px; border-radius: 50%; background: rgba(53,215,255,.16); }
.page-hero-card > * { position: relative; z-index: 1; }
.page-hero .lead { margin-bottom: 0; }
.breadcrumb { margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--blue); font-weight: 700; }

.product-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 18px; }
.product-tile { padding: 22px; border-radius: 18px; background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow-soft); }
.product-tile strong { display: block; margin-bottom: 8px; color: var(--deep); font-size: 18px; }
.product-tile p { margin-bottom: 0; font-size: 15px; }

.image-gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.image-card { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-soft); }
.image-card .image-wrap { min-height: 230px; padding: 16px; display: flex; align-items: center; justify-content: center; background: linear-gradient(145deg, #E8F7FF, #FFFFFF); }
.image-card img { width: 100%; max-height: 360px; object-fit: contain; }
.image-card .image-copy { padding: 20px; }
.image-card .image-copy p { margin-bottom: 0; }

.steps { counter-reset: step; display: grid; gap: 16px; }
.step { position: relative; padding: 24px 24px 24px 76px; border: 1px solid var(--border); border-radius: 18px; background: #fff; }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 22px; top: 22px; width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; color: #fff; font-weight: 800; background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%); }
.step h3 { margin-bottom: 6px; }
.step p { margin-bottom: 0; }

.notice-panel { padding: clamp(26px, 4vw, 42px); background: linear-gradient(145deg, #E8F7FF, #FFFFFF); }
.notice-list { margin: 0; padding-left: 22px; color: var(--muted); }
.notice-list li + li { margin-top: 10px; }
.review-card { position: relative; padding: 26px; }
.review-card::before { content: "“"; position: absolute; right: 18px; top: 8px; color: rgba(17,174,234,.16); font-size: 72px; font-family: Georgia, serif; line-height: 1; }
.review-card p { position: relative; min-height: 92px; color: var(--text); }
.review-card strong { color: var(--blue); }
.review-card span { color: var(--muted); font-size: 14px; }

.faq-list { display: grid; gap: 16px; }
.faq-item { padding: 24px 26px; }
.faq-item h3 { padding-right: 20px; }
.faq-item p { margin-bottom: 0; }
.compliance-box { padding: clamp(30px, 5vw, 54px); border-radius: var(--radius-lg); background: var(--footer); box-shadow: var(--shadow); }
.compliance-box h2, .compliance-box h3 { color: #fff; }
.compliance-box p { color: var(--footer-text); }
.compliance-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 26px; }
.compliance-item { padding: 20px; border: 1px solid rgba(234,248,255,.16); border-radius: 16px; background: rgba(255,255,255,.06); }
.compliance-item p { margin-bottom: 0; font-size: 15px; }

.site-footer { padding: 66px 0 22px; background: var(--footer); color: var(--footer-text); }
.footer-grid { grid-template-columns: 1.45fr repeat(3, .85fr); }
.footer-brand img { width: 132px; height: 46px; margin-bottom: 18px; object-fit: contain; filter: brightness(0) invert(1); }
.site-footer h2 { margin-bottom: 14px; color: #fff; font-size: 18px; }
.site-footer p, .site-footer a { color: rgba(234,248,255,.78); }
.site-footer a { display: block; margin: 8px 0; }
.site-footer a:hover { color: #fff; }
.footer-notice { margin-top: 34px; padding-top: 24px; border-top: 1px solid rgba(234,248,255,.14); }
.footer-notice p { margin-bottom: 0; font-size: 14px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; margin-top: 22px; padding-top: 18px; border-top: 1px solid rgba(234,248,255,.12); color: rgba(234,248,255,.64); font-size: 13px; }

@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: flex; }
    .header-inner { justify-content: space-between; }
}
@media (max-width: 980px) {
    .grid-4, .quick-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-3, .review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .home-intro-grid, .media-block, .media-block.reverse { grid-template-columns: 1fr; }
    .media-block.reverse .media-copy, .media-block.reverse .media-frame { order: initial; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .compliance-grid { grid-template-columns: 1fr; }
    .hero-slider { aspect-ratio: 16 / 8.5; }
}
@media (max-width: 680px) {
    :root { --header-height: 68px; }
    .shell, .header-inner, .hero-slider { width: min(100% - 24px, 1220px); }
    .brand-logo img { width: 102px; height: 38px; }
    .main-btn { min-height: 42px; padding-inline: 18px; }
    .header-actions { gap: 8px; }
    .hero-slider-wrap { padding-top: 12px; }
    .hero-slider { min-height: 210px; aspect-ratio: 16 / 10; border-radius: 18px; }
    .slider-arrow { width: 40px; height: 40px; font-size: 20px; }
    .slider-arrow.prev { left: 10px; }
    .slider-arrow.next { right: 10px; }
    .slider-dots { bottom: 10px; }
    .grid-2, .grid-3, .grid-4, .quick-grid, .review-grid, .footer-grid { grid-template-columns: 1fr; }
    .stat-panel { grid-template-columns: 1fr 1fr; padding: 18px; }
    .intro-panel, .page-hero-card, .content-card, .review-card, .faq-item { padding: 22px; }
    .quick-card { min-height: auto; }
    .media-frame { min-height: 240px; padding: 12px; }
    .footer-bottom { flex-direction: column; }
    .page-hero { padding-top: 38px; }
}
@media (max-width: 420px) {
    .header-inner { gap: 8px; }
    .header-actions .main-btn { padding-inline: 15px; }
    .menu-toggle { width: 42px; height: 42px; }
    .stat-panel { grid-template-columns: 1fr; }
    .step { padding-left: 68px; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}