* { box-sizing: border-box; }
:root {
    --bg: #E6EBF2;
    --surface: #FFFFFF;
    --surface-soft: #F5F7FB;
    --surface-muted: #EEF2F7;
    --line: rgba(40, 156, 255, 0.16);
    --primary: #289CFF;
    --primary-dark: #147ECF;
    --text: #243447;
    --muted: #66788A;
    --footer: #243447;
    --gradient: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%);
    --shadow: 0 14px 36px rgba(56, 92, 138, 0.10);
    --radius: 22px;
}
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    line-height: 1.75;
    overflow-x: hidden;
}
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; }
h1, h2, h3, .section-title { color: var(--primary); line-height: 1.28; }
h1 { font-size: clamp(2rem, 4vw, 3.7rem); margin: 0 0 20px; }
h2 { font-size: clamp(1.5rem, 2.4vw, 2.25rem); margin: 0; }
h3 { font-size: 1.15rem; margin: 0 0 10px; }
p { margin: 0 0 16px; }
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 900;
    background: rgba(245,247,251,0.94);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(56,92,138,0.10);
    border-bottom: 1px solid rgba(255,255,255,0.75);
}
.header-inner {
    width: min(1380px, calc(100% - 40px));
    min-height: 76px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 24px;
}
.logo img { max-height: 52px; width: auto; }
.nav-core { display: flex; justify-content: center; gap: 24px; white-space: nowrap; flex-wrap: nowrap; }
.nav-core a { color: #4E5F7A; position: relative; font-weight: 600; padding: 10px 2px; }
.nav-core a:hover, .nav-core a.active { color: var(--primary); }
.nav-core a.active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -5px;
    width: 28px;
    height: 3px;
    border-radius: 999px;
    background: var(--primary);
    transform: translateX(-50%);
}
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 25px;
    background: var(--gradient);
    color: #FFFFFF;
    border-radius: 999px;
    font-weight: 700;
    box-shadow: 0 10px 24px rgba(36,155,255,0.24);
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 15px 30px rgba(36,155,255,0.30); }
.header-register { white-space: nowrap; }
.mobile-menu-button { display: none; width: 42px; height: 42px; padding: 9px; border: 0; background: transparent; }
.mobile-menu-button span { display: block; height: 2px; margin: 5px 0; background: var(--text); border-radius: 3px; }
.site-shell {
    width: min(1460px, calc(100% - 44px));
    margin: 0 auto;
    padding-top: 104px;
    display: grid;
    grid-template-columns: 205px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
}
.side-channel {
    position: sticky;
    top: 102px;
    background: rgba(255,255,255,0.92);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: 0 14px 32px rgba(56,92,138,0.10);
    padding: 16px;
    max-height: calc(100vh - 124px);
    overflow: auto;
}
.side-title { margin: 0 0 10px; padding: 0 10px; color: var(--text); font-weight: 800; }
.side-channel nav { display: grid; gap: 4px; }
.side-channel a { color: var(--muted); border-radius: 12px; padding: 8px 10px; font-size: 14px; }
.side-channel a:hover, .side-channel a.active { color: var(--primary); background: rgba(40,156,255,0.10); }
.site-main { min-width: 0; padding-bottom: 70px; }
.floating-service {
    position: fixed;
    right: 18px;
    top: 42%;
    z-index: 60;
    display: grid;
    gap: 8px;
    padding: 8px;
    border-radius: 18px;
    background: rgba(255,255,255,0.78);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}
.floating-service a, .floating-service button {
    min-width: 54px;
    min-height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #FFFFFF;
    color: var(--primary);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(56,92,138,0.08);
    font-size: 13px;
    font-weight: 700;
}
.floating-service .register-link { background: var(--gradient); color: #FFFFFF; }
.card, .zone-card, .info-card, .review-card {
    background: rgba(255,255,255,0.92);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    border-radius: var(--radius);
}
.section-block { margin: 34px 0; }
.section-title-row { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin: 0 0 20px; }
.eyebrow { color: var(--primary-dark); font-weight: 800; letter-spacing: .12em; font-size: 13px; margin-bottom: 8px; }
.text-link { color: var(--primary-dark); font-weight: 700; }
.text-link:hover { color: var(--primary); }
.banner-slider {
    width: 100%;
    height: clamp(300px, 31vw, 400px);
    margin: 0 auto 36px;
    border-radius: 22px;
    background: #FFFFFF;
    box-shadow: 0 18px 40px rgba(56,92,138,0.12);
    overflow: hidden;
    position: relative;
    z-index: 1;
}
.banner-slider .slide { display: none; width: 100%; height: 100%; }
.banner-slider .slide.active { display: block; }
.banner-slider img { width: 100%; height: 100%; object-fit: contain; background: #FFFFFF; }
.banner-caption, .banner-text, .slide-title, .slide-desc, .slide-content, .slide-card, .banner-card { display: none !important; }
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 46px;
    height: 46px;
    border: none;
    border-radius: 999px;
    background: rgba(255,255,255,0.86);
    color: var(--primary);
    box-shadow: 0 8px 20px rgba(56,92,138,0.16);
}
.slider-arrow::before { display: block; font-size: 28px; line-height: 1; }
.slider-arrow.prev { left: 16px; }
.slider-arrow.next { right: 16px; }
.slider-arrow.prev::before { content: "‹"; }
.slider-arrow.next::before { content: "›"; }
.slider-dots { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); display: flex; gap: 8px; z-index: 3; }
.slider-dots button { width: 9px; height: 9px; padding: 0; border-radius: 50%; border: none; background: rgba(40,156,255,0.24); }
.slider-dots button.active { background: var(--primary); }
.intro-split { display: grid; grid-template-columns: minmax(0,1.12fr) minmax(300px,.88fr); gap: 28px; align-items: center; padding: 34px; }
.intro-split img, .feature-media img, .page-hero-media img { width: 100%; max-height: 300px; object-fit: contain; }
.lead { font-size: 1.08rem; color: var(--muted); }
.hero-actions { display: flex; align-items: center; gap: 18px; margin-top: 24px; flex-wrap: wrap; }
.quick-grid { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 14px; }
.quick-card { padding: 18px; min-height: 150px; display: flex; flex-direction: column; justify-content: space-between; }
.quick-card p { color: var(--muted); font-size: 14px; }
.service-grid, .review-grid, .product-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.service-card, .product-card { padding: 24px; }
.service-card p, .product-card p { color: var(--muted); }
.dual-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
.feature-panel { padding: 28px; }
.feature-panel p { color: var(--muted); }
.matrix-grid { display: grid; grid-template-columns: repeat(6, minmax(0,1fr)); gap: 14px; }
.matrix-card { padding: 20px; min-height: 170px; }
.matrix-card p { color: var(--muted); font-size: 14px; }
.feature-media { overflow: hidden; }
.feature-media .media-copy { padding: 28px; }
.feature-media img { padding: 20px 20px 0; }
.horizontal-products { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.horizontal-products article { padding: 20px; }
.horizontal-products img { width: 100%; height: 165px; object-fit: contain; margin-bottom: 16px; }
.notice-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; }
.notice-card { padding: 26px; }
.review-card { margin: 0; padding: 24px; color: var(--text); }
.review-card p { color: var(--muted); }
.review-card footer { color: var(--primary-dark); font-weight: 800; }
.faq-list { display: grid; gap: 12px; }
.faq-item { background: rgba(255,255,255,.94); border: 1px solid var(--line); border-radius: 16px; padding: 0 20px; box-shadow: 0 8px 24px rgba(56,92,138,.06); }
.faq-item summary { cursor: pointer; padding: 18px 0; color: var(--text); font-weight: 800; }
.faq-item p { color: var(--muted); padding: 0 0 18px; margin: 0; }
.compliance-card { margin: 34px 0 0; padding: 28px; border-radius: var(--radius); background: #DDE4EE; border: 1px solid rgba(36,52,71,.08); }
.compliance-card h2 { color: var(--text); font-size: 1.5rem; margin-bottom: 10px; }
.compliance-card p { color: #4E5F6F; }
.page-hero { padding: 38px; display: block; }
.page-hero.has-image { display: grid; grid-template-columns: minmax(0,1.1fr) minmax(280px,.9fr); gap: 30px; align-items: center; }
.page-hero-media { margin: 0; padding: 18px; border-radius: 18px; background: var(--surface-soft); }
.page-section { margin-top: 22px; padding: 30px; }
.page-section p { color: var(--muted); }
.section-heading { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.section-heading span { width: 40px; height: 40px; display: inline-flex; align-items: center; justify-content: center; border-radius: 12px; background: rgba(40,156,255,.10); color: var(--primary); font-weight: 900; }
.section-heading h2 { font-size: 1.65rem; }
.feature-list { margin: 18px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
.feature-list li { position: relative; padding: 12px 14px 12px 38px; background: var(--surface-soft); border-radius: 12px; color: #526577; }
.feature-list li::before { content: "✓"; position: absolute; left: 14px; color: var(--primary); font-weight: 900; }
.site-footer { background: var(--footer); color: #EAF3FF; padding: 52px 28px 110px; }
.footer-inner { width: min(1200px,100%); margin: 0 auto; display: grid; grid-template-columns: 1.1fr 1.9fr; gap: 54px; }
.footer-brand img { max-height: 54px; width: auto; filter: brightness(0) invert(1); margin-bottom: 18px; }
.footer-brand p { color: #BFD0E4; max-width: 480px; }
.footer-links { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 28px; }
.footer-links h2 { color: #FFFFFF; font-size: 1rem; margin-bottom: 12px; }
.footer-links a { display: block; color: #BFD0E4; margin: 8px 0; font-size: 14px; }
.footer-links a:hover { color: #FFFFFF; }
.footer-legal { width: min(1200px,100%); margin: 30px auto 0; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); color: #9FB2C8; font-size: 13px; }
.mobile-drawer { position: fixed; z-index: 10000; inset: 0 auto 0 0; width: min(84vw,320px); background: #FFFFFF; transform: translateX(-104%); transition: transform .26s ease; box-shadow: 20px 0 50px rgba(25,52,82,.22); overflow-y: auto; }
.mobile-drawer.open { transform: translateX(0); }
.drawer-overlay { position: fixed; z-index: 9999; inset: 0; background: rgba(20,37,56,.44); opacity: 0; visibility: hidden; transition: .2s ease; }
.drawer-overlay.open { opacity: 1; visibility: visible; }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding: 18px; border-bottom: 1px solid #E5EBF2; }
.drawer-logo img { max-height: 44px; width: auto; }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 12px; background: var(--surface-soft); color: var(--text); font-size: 26px; line-height: 1; }
.drawer-nav { display: grid; padding: 14px; gap: 5px; }
.drawer-nav a { padding: 11px 14px; border-radius: 12px; color: var(--muted); }
.drawer-nav a:hover, .drawer-nav a.active { background: rgba(40,156,255,.10); color: var(--primary); }
.mobile-bottom-nav { display: none; }
@media (max-width: 1260px) {
    .site-shell { grid-template-columns: 185px minmax(0,1fr); }
    .quick-grid { grid-template-columns: repeat(4,minmax(0,1fr)); }
    .matrix-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
    .floating-service { display: none; }
}
@media (max-width: 980px) {
    .site-shell { width: min(100% - 30px, 960px); grid-template-columns: 1fr; padding-top: 96px; }
    .side-channel { display: none; }
    .header-inner { width: calc(100% - 28px); grid-template-columns: 42px 1fr auto; min-height: 68px; gap: 10px; }
    .mobile-menu-button { display: block; }
    .logo { justify-self: center; }
    .logo img { max-height: 44px; }
    .nav-core { display: none; }
    .header-register { min-height: 38px; padding: 0 16px; }
    .banner-slider { height: clamp(230px, 45vw, 320px); }
    .quick-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .service-grid, .review-grid, .product-grid, .horizontal-products { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .intro-split, .page-hero.has-image { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
    body { padding-bottom: 74px; }
    .site-shell { width: calc(100% - 22px); padding-top: 84px; }
    .banner-slider { height: clamp(170px, 55vw, 230px); border-radius: 16px; margin-bottom: 24px; }
    .slider-arrow { width: 38px; height: 38px; }
    .slider-arrow.prev { left: 8px; }
    .slider-arrow.next { right: 8px; }
    .intro-split, .page-hero, .page-section { padding: 22px; }
    .quick-grid, .service-grid, .dual-grid, .product-grid, .horizontal-products, .notice-grid, .review-grid, .matrix-grid { grid-template-columns: 1fr; }
    .feature-list { grid-template-columns: 1fr; }
    .section-title-row { align-items: start; flex-direction: column; gap: 8px; }
    .page-hero.has-image { display: flex; flex-direction: column; }
    .page-hero-media { order: -1; width: 100%; }
    h1 { font-size: 2rem; }
    .mobile-bottom-nav {
        position: fixed;
        z-index: 800;
        left: 10px;
        right: 10px;
        bottom: calc(8px + env(safe-area-inset-bottom));
        display: grid;
        grid-template-columns: repeat(4,1fr);
        background: rgba(255,255,255,.96);
        border: 1px solid var(--line);
        border-radius: 18px;
        box-shadow: 0 14px 34px rgba(25,52,82,.18);
        overflow: hidden;
        backdrop-filter: blur(12px);
    }
    .mobile-bottom-nav a { display: flex; min-height: 58px; flex-direction: column; align-items: center; justify-content: center; color: var(--muted); font-size: 12px; }
    .mobile-bottom-nav span { width: 24px; height: 24px; display: inline-flex; align-items: center; justify-content: center; border-radius: 8px; background: var(--surface-soft); color: var(--primary); font-weight: 900; }
    .mobile-bottom-nav a.active { color: var(--primary); background: rgba(40,156,255,.06); }
    .site-footer { padding: 44px 18px 28px; }
    .footer-links { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 430px) {
    .header-inner { width: calc(100% - 18px); }
    .header-register { padding: 0 13px; }
    .logo img { max-width: 130px; max-height: 40px; }
    .footer-links { grid-template-columns: 1fr; }
}