:root {
    --page: #EAF2FB;
    --surface: #FFFFFF;
    --soft: #F4F8FF;
    --soft-2: #EDF5FF;
    --soft-3: #E1ECF8;
    --blue: #2FA8F7;
    --cyan: #45C7FF;
    --deep: #137CD8;
    --title: #137CD8;
    --text: #24364F;
    --muted: #5D718A;
    --border: rgba(47,168,247,0.14);
    --footer: #102B46;
    --footer-text: #EAF6FF;
    --shadow: 0 18px 50px rgba(30, 97, 150, 0.10);
    --radius-xl: 30px;
    --radius-lg: 22px;
    --radius-md: 16px;
}

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

.desktop-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 7600;
    height: 74px;
    background: rgba(255,255,255,0.94);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
}
.desktop-header__inner {
    width: min(1180px, calc(100% - 40px));
    height: 100%;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 210px 1fr 110px;
    align-items: center;
    gap: 24px;
}
.brand-logo { display: inline-flex; align-items: center; width: 158px; }
.brand-logo img { width: 100%; max-height: 46px; object-fit: contain; }
.core-nav { display: flex; justify-content: center; align-items: stretch; height: 100%; gap: 8px; white-space: nowrap; }
.core-nav a {
    position: relative;
    min-width: 82px;
    height: 100%;
    padding: 0 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    font-weight: 700;
    transition: .2s ease;
}
.core-nav a:hover { color: var(--deep); background: var(--soft); }
.core-nav a::after {
    content: "";
    position: absolute;
    left: 28%; right: 28%; bottom: 10px;
    height: 3px;
    border-radius: 999px;
    background: transparent;
}
.core-nav a.is-active { color: var(--deep); }
.core-nav a.is-active::after { background: var(--blue); }
.main-btn {
    min-height: 44px;
    padding: 0 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #45C7FF 0%, #2FA8F7 48%, #137CD8 100%);
    color: #FFFFFF;
    border: 0;
    border-radius: 999px;
    box-shadow: 0 12px 26px rgba(19,124,216,0.18);
    font-weight: 800;
    letter-spacing: .04em;
}
.main-btn:hover { transform: translateY(-1px); box-shadow: 0 16px 30px rgba(19,124,216,0.24); }
.desktop-register { justify-self: end; }

.mobile-header { display: none; }
.mobile-drawer, .drawer-mask { display: none; }

.channel-bar {
    position: sticky;
    top: 74px;
    z-index: 7200;
    background: rgba(244,248,255,0.94);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
}
.channel-bar__inner {
    width: min(1220px, calc(100% - 28px));
    margin: 0 auto;
    padding: 10px 0;
    display: flex;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: none;
    overscroll-behavior-inline: contain;
}
.channel-bar__inner::-webkit-scrollbar { display: none; }
.channel-bar a {
    flex: 0 0 auto;
    padding: 6px 12px;
    border-radius: 999px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}
.channel-bar a:hover, .channel-bar a.is-active { color: #fff; background: var(--blue); }

.site-main { padding-top: 74px; min-height: 60vh; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 34px 0; }
.section--tight { padding: 22px 0; }
.section--large { padding: 50px 0; }
.section-heading { margin-bottom: 22px; }
.eyebrow {
    margin: 0 0 8px;
    color: var(--blue);
    font-weight: 800;
    font-size: 13px;
    letter-spacing: .14em;
    text-transform: uppercase;
}
h1, h2, h3 { margin: 0; color: var(--title); line-height: 1.3; }
h1 { font-size: clamp(30px, 4vw, 50px); }
h2 { font-size: clamp(24px, 3vw, 34px); }
h3 { font-size: 20px; }
p { margin: 0 0 14px; }
.lead { color: var(--muted); font-size: 17px; max-width: 780px; }
.text-link { color: var(--deep); font-weight: 800; }
.text-link:hover { color: var(--blue); text-decoration: underline; }

.banner-wrap { padding: 26px 0 18px; background: linear-gradient(180deg, #E8F2FC 0%, #EAF2FB 100%); }
.banner-shell {
    width: min(1240px, calc(100% - 32px));
    margin: 0 auto;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 32px;
    box-shadow: var(--shadow);
}
.banner-slider {
    position: relative;
    z-index: 1;
    width: 100%;
    aspect-ratio: 16 / 6.3;
    overflow: hidden;
    border-radius: 23px;
    background: var(--soft-3);
}
.banner-slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .45s ease; }
.banner-slide.is-active { opacity: 1; visibility: visible; }
.banner-slide img { width: 100%; height: 100%; object-fit: contain; background: #fff; }
.slider-arrow {
    position: absolute;
    top: 50%;
    z-index: 3;
    width: 46px;
    height: 46px;
    border: 0;
    border-radius: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,.90);
    color: var(--deep);
    box-shadow: 0 8px 24px rgba(16,43,70,.16);
    font-size: 24px;
}
.slider-prev { left: 16px; }
.slider-next { right: 16px; }
.slider-dots {
    position: absolute;
    left: 50%;
    bottom: 14px;
    z-index: 3;
    transform: translateX(-50%);
    display: flex;
    gap: 9px;
}
.slider-dot { width: 12px; height: 12px; padding: 0; border: 2px solid #fff; border-radius: 50%; background: rgba(19,124,216,.38); }
.slider-dot.is-active { width: 28px; border-radius: 999px; background: var(--deep); }

.card, .feature-card, .content-panel, .quote-card, .faq-card, .page-hero, .notice-strip {
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.card { padding: 24px; border-radius: var(--radius-lg); }
.card p:last-child { margin-bottom: 0; }
.grid { display: grid; gap: 20px; }
.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)); }

.feature-card {
    padding: 20px;
    border-radius: 20px;
    transition: transform .2s ease, box-shadow .2s ease;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: 0 22px 54px rgba(30,97,150,.15); }
.feature-card h3 { margin-bottom: 10px; }
.feature-card p { color: var(--muted); font-size: 14px; }
.feature-card .text-link { display: inline-flex; margin-top: 4px; }

.notice-strip {
    padding: 20px 24px;
    border-radius: 20px;
    background: linear-gradient(90deg, #FFFFFF 0%, #EDF5FF 100%);
}
.notice-strip p { margin: 0; color: var(--muted); }

.media-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(340px, .95fr);
    gap: 28px;
    align-items: center;
    padding: 28px;
    border-radius: var(--radius-xl);
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.media-panel.reverse { grid-template-columns: minmax(340px, .95fr) minmax(0, 1.05fr); }
.media-panel.reverse .media-image { order: -1; }
.media-image {
    min-height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 14px;
    border-radius: 22px;
    background: var(--soft);
    overflow: hidden;
}
.media-image img { width: 100%; max-height: 380px; object-fit: contain; }
.media-copy ul, .check-list { margin: 14px 0 18px; padding-left: 20px; color: var(--muted); }

.product-card {
    overflow: hidden;
    border-radius: 24px;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.product-card__image { aspect-ratio: 16 / 10; display: flex; align-items: center; justify-content: center; padding: 12px; background: var(--soft); }
.product-card__image img { width: 100%; height: 100%; object-fit: contain; }
.product-card__body { padding: 22px; }
.product-card__body p { color: var(--muted); }

.dashboard-card { padding: 22px; border-radius: 20px; background: linear-gradient(145deg, #fff, #F4F8FF); border: 1px solid var(--border); }
.dashboard-card strong { display: block; margin-bottom: 8px; color: var(--deep); font-size: 19px; }
.dashboard-card p { margin: 0; color: var(--muted); }

.quote-card { padding: 22px; border-radius: 20px; }
.quote-card p { color: var(--muted); }
.quote-card strong { color: var(--deep); }

.faq-list { display: grid; gap: 12px; }
.faq-card { border-radius: 16px; overflow: hidden; }
.faq-card summary { padding: 18px 20px; cursor: pointer; color: var(--deep); font-weight: 800; list-style: none; }
.faq-card summary::-webkit-details-marker { display: none; }
.faq-card summary::after { content: "+"; float: right; color: var(--blue); font-size: 22px; }
.faq-card[open] summary::after { content: "−"; }
.faq-card p { padding: 0 20px 20px; margin: 0; color: var(--muted); }

.page-hero {
    margin: 26px auto 10px;
    padding: 38px;
    border-radius: var(--radius-xl);
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
    gap: 30px;
    align-items: center;
    background: linear-gradient(140deg, #FFFFFF 0%, #EDF5FF 100%);
}
.page-hero__copy .lead { margin-top: 16px; }
.page-hero__image { min-height: 280px; display: flex; align-items: center; justify-content: center; border-radius: 24px; background: rgba(255,255,255,.72); padding: 16px; }
.page-hero__image img { width: 100%; max-height: 360px; object-fit: contain; }
.page-hero--text { grid-template-columns: 1fr; }
.page-hero--text .lead { max-width: 900px; }

.content-panel { padding: 28px; border-radius: 24px; }
.content-panel h2, .content-panel h3 { margin-bottom: 12px; }
.content-panel p, .content-panel li { color: var(--muted); }
.content-panel + .content-panel { margin-top: 20px; }
.kicker-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 0; }
.kicker-list span { padding: 7px 12px; border-radius: 999px; background: var(--soft-2); color: var(--deep); font-size: 13px; font-weight: 800; }

.info-table { width: 100%; border-collapse: collapse; margin-top: 14px; }
.info-table th, .info-table td { padding: 14px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.info-table th { width: 26%; color: var(--deep); background: var(--soft); }
.info-table td { color: var(--muted); }

.floating-service {
    position: fixed;
    right: 24px;
    top: 50%;
    z-index: 8000;
    width: 118px;
    transform: translateY(-50%);
    padding: 12px;
    display: grid;
    gap: 8px;
    border-radius: 20px;
    background: rgba(255,255,255,.96);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.floating-service a:not(.main-btn), .floating-service button {
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 12px;
    background: var(--soft);
    color: var(--deep);
    font-size: 13px;
    font-weight: 800;
}
.floating-service .main-btn { min-height: 40px; padding: 0 14px; font-size: 13px; }

.mobile-bottom-nav { display: none; }
.site-footer { margin-top: 42px; padding: 50px 0 20px; background: var(--footer); color: var(--footer-text); }
.footer-grid { width: min(1180px, calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: 1.7fr 1fr 1fr 1fr; gap: 34px; }
.footer-grid h2 { margin-bottom: 14px; color: #fff; font-size: 18px; }
.footer-grid section:not(.footer-brand) { display: flex; flex-direction: column; gap: 9px; }
.footer-grid a { color: #CBE6FA; }
.footer-grid a:hover { color: #fff; }
.footer-brand img { width: 160px; max-height: 50px; object-fit: contain; margin-bottom: 16px; }
.footer-brand p { color: #B9D5E9; max-width: 420px; }
.footer-notice { width: min(1180px, calc(100% - 40px)); margin: 28px auto 0; padding-top: 20px; border-top: 1px solid rgba(234,246,255,.14); color: #AFCBDD; font-size: 13px; }
.footer-notice p:last-child { margin-bottom: 0; }

@media (max-width: 1240px) {
    .floating-service { display: none; }
}

@media (max-width: 900px) {
    .desktop-header, .channel-bar { display: none; }
    .mobile-header {
        position: fixed;
        inset: 0 0 auto 0;
        z-index: 9000;
        height: 66px;
        padding: 0 14px;
        display: grid;
        grid-template-columns: 48px 1fr 82px;
        align-items: center;
        background: rgba(255,255,255,.96);
        border-bottom: 1px solid var(--border);
        backdrop-filter: blur(14px);
    }
    .menu-toggle {
        width: 44px;
        height: 44px;
        padding: 10px;
        display: grid;
        align-content: center;
        gap: 5px;
        border: 0;
        border-radius: 12px;
        background: var(--soft);
    }
    .menu-toggle span { display: block; height: 2px; border-radius: 2px; background: var(--deep); }
    .mobile-logo { justify-self: center; width: 132px; }
    .mobile-logo img { width: 100%; max-height: 42px; object-fit: contain; }
    .mobile-register { min-width: 76px; min-height: 42px; padding: 0 16px; justify-self: end; position: relative; z-index: 9001; }
    .drawer-mask {
        position: fixed;
        inset: 0;
        z-index: 9990;
        display: none;
        visibility: hidden;
        pointer-events: none;
        background: rgba(12,31,51,.46);
    }
    .drawer-mask.is-visible { display: block; visibility: visible; pointer-events: auto; }
    .mobile-drawer {
        position: fixed;
        inset: 0 auto 0 0;
        z-index: 10000;
        width: min(86vw, 360px);
        display: block;
        transform: translateX(-104%);
        transition: transform .26s ease;
        background: #fff;
        box-shadow: 18px 0 44px rgba(16,43,70,.22);
        overflow-y: auto;
        overscroll-behavior: contain;
    }
    .mobile-drawer.is-open { transform: translateX(0); }
    .drawer-head { position: sticky; top: 0; z-index: 2; height: 68px; padding: 0 14px 0 18px; display: flex; align-items: center; justify-content: space-between; background: #fff; border-bottom: 1px solid var(--border); }
    .drawer-logo { width: 140px; }
    .drawer-logo img { width: 100%; max-height: 44px; object-fit: contain; }
    .drawer-close { width: 44px; height: 44px; border: 0; border-radius: 12px; background: var(--soft); color: var(--deep); font-size: 28px; line-height: 1; }
    .drawer-nav { padding: 14px 14px 28px; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 9px; }
    .drawer-nav a { min-height: 46px; padding: 10px 12px; display: flex; align-items: center; justify-content: center; border-radius: 13px; background: var(--soft); color: var(--muted); font-size: 14px; font-weight: 800; }
    .drawer-nav a.is-active { background: var(--blue); color: #fff; }
    .site-main { padding-top: 66px; }
    .container { width: min(100% - 26px, 720px); }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .media-panel, .media-panel.reverse, .page-hero { grid-template-columns: 1fr; }
    .media-panel.reverse .media-image { order: 0; }
    .page-hero { padding: 28px; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .mobile-bottom-nav {
        position: fixed;
        inset: auto 10px max(10px, env(safe-area-inset-bottom)) 10px;
        z-index: 8500;
        height: 58px;
        padding: 6px;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        border: 1px solid var(--border);
        border-radius: 18px;
        background: rgba(255,255,255,.97);
        box-shadow: 0 14px 36px rgba(16,43,70,.20);
        backdrop-filter: blur(12px);
    }
    .mobile-bottom-nav a { min-height: 44px; display: flex; align-items: center; justify-content: center; border-radius: 13px; color: var(--muted); font-size: 13px; font-weight: 800; }
    .mobile-bottom-nav a.is-active { background: var(--soft-2); color: var(--deep); }
    .site-footer { padding-bottom: 100px; }
}

@media (max-width: 620px) {
    .section { padding: 24px 0; }
    .section--large { padding: 34px 0; }
    .banner-wrap { padding-top: 12px; }
    .banner-shell { width: calc(100% - 18px); padding: 7px; border-radius: 22px; }
    .banner-slider { aspect-ratio: 16 / 8.8; border-radius: 16px; }
    .slider-arrow { width: 42px; height: 42px; font-size: 20px; }
    .slider-prev { left: 8px; }
    .slider-next { right: 8px; }
    .slider-dots { bottom: 9px; gap: 7px; }
    .slider-dot { width: 10px; height: 10px; }
    .slider-dot.is-active { width: 24px; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .card, .content-panel { padding: 20px; }
    .media-panel { padding: 18px; gap: 20px; border-radius: 22px; }
    .media-image, .page-hero__image { min-height: 210px; }
    .page-hero { width: calc(100% - 22px); margin-top: 16px; padding: 22px; gap: 20px; border-radius: 22px; }
    .page-hero__image { padding: 10px; }
    .notice-strip { padding: 18px; }
    .footer-grid { width: calc(100% - 28px); grid-template-columns: 1fr; gap: 24px; }
    .footer-notice { width: calc(100% - 28px); }
    .info-table, .info-table tbody, .info-table tr, .info-table th, .info-table td { display: block; width: 100%; }
    .info-table th { border-bottom: 0; padding-bottom: 6px; }
    .info-table td { padding-top: 6px; }
}