:root {
    --page-bg: #EAF2FB;
    --content-bg: #FFFFFF;
    --soft-bg: #F4F8FF;
    --soft-bg-2: #EDF5FF;
    --soft-bg-3: #E1ECF8;
    --primary: #2FA8F7;
    --bright: #45C7FF;
    --deep: #137CD8;
    --text: #24364F;
    --muted: #5D718A;
    --border: rgba(47,168,247,0.14);
    --footer: #102B46;
    --footer-text: #EAF6FF;
    --shadow: 0 18px 50px rgba(36,54,79,0.10);
    --radius-lg: 30px;
    --radius-md: 20px;
    --header-h: 76px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
    margin: 0;
    color: var(--text);
    background: var(--page-bg);
    font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.72;
    overflow-x: hidden;
}
body.drawer-open { overflow-y: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; touch-action: manipulation; }
button { font: inherit; touch-action: manipulation; }
p { margin: 0 0 1em; }
h1, h2, h3 { margin: 0; line-height: 1.25; color: var(--deep); }
h1 { font-size: clamp(2.1rem, 5vw, 4.2rem); letter-spacing: -0.04em; }
h2 { font-size: clamp(1.55rem, 3vw, 2.45rem); }
h3 { font-size: 1.18rem; }

.skip-link {
    position: fixed;
    left: 12px;
    top: -80px;
    z-index: 12000;
    background: #fff;
    color: var(--deep);
    padding: 10px 16px;
    border-radius: 12px;
}
.skip-link:focus { top: 12px; }

.section-shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.section { padding: 78px 0; }
.section.compact { padding: 50px 0; }
.section-heading { display: grid; gap: 12px; margin-bottom: 30px; max-width: 760px; }
.section-heading p { color: var(--muted); margin: 0; }
.eyebrow, .card-label {
    display: inline-flex;
    width: fit-content;
    color: var(--deep);
    background: var(--soft-bg-2);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 6px 12px;
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .08em;
}

.main-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-width: 94px;
    min-height: 44px;
    padding: 11px 22px;
    color: #fff;
    background: linear-gradient(135deg, #45C7FF 0%, #2FA8F7 48%, #137CD8 100%);
    border: 0;
    border-radius: 999px;
    box-shadow: 0 12px 26px rgba(19,124,216,0.18);
    font-weight: 700;
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 30px rgba(19,124,216,.24); }
.text-link { color: var(--deep); font-weight: 700; }
.text-link:hover { color: var(--primary); }

.desktop-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 7000;
    height: var(--header-h);
    background: rgba(255,255,255,.90);
    border-bottom: 1px solid rgba(47,168,247,.12);
    backdrop-filter: blur(18px);
}
.header-inner {
    width: min(1180px, calc(100% - 40px));
    height: 100%;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 190px 1fr auto;
    align-items: center;
    gap: 24px;
}
.brand-logo img { width: 152px; max-height: 48px; object-fit: contain; }
.core-nav { display: flex; justify-content: center; gap: clamp(12px, 2vw, 30px); white-space: nowrap; }
.core-nav a { position: relative; padding: 14px 8px; color: var(--muted); font-weight: 700; border-radius: 12px; }
.core-nav a:hover { color: var(--deep); background: var(--soft-bg); }
.core-nav a.active { color: var(--deep); }
.core-nav a.active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 6px;
    width: 26px;
    height: 3px;
    background: var(--primary);
    border-radius: 999px;
    transform: translateX(-50%);
}
.header-register { position: relative; z-index: 9100; }

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

.channel-bar {
    position: sticky;
    top: var(--header-h);
    z-index: 6000;
    margin-top: var(--header-h);
    padding: 10px 0;
    background: rgba(244,248,255,.92);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
}
.channel-scroll {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    display: flex;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: thin;
    overscroll-behavior-inline: contain;
}
.channel-scroll a {
    flex: 0 0 auto;
    padding: 7px 12px;
    border-radius: 999px;
    color: var(--muted);
    font-size: .88rem;
    white-space: nowrap;
}
.channel-scroll a:hover, .channel-scroll a.active { color: var(--deep); background: #fff; box-shadow: 0 8px 22px rgba(36,54,79,.07); }

.floating-service {
    position: fixed;
    right: 18px;
    top: 50%;
    z-index: 8000;
    width: 116px;
    padding: 14px;
    display: grid;
    gap: 8px;
    background: rgba(255,255,255,.96);
    border: 1px solid var(--border);
    border-radius: 22px;
    box-shadow: var(--shadow);
    transform: translateY(-50%);
}
.floating-service > a:not(.main-btn), .floating-service button {
    min-height: 40px;
    display: grid;
    place-items: center;
    color: var(--deep);
    background: var(--soft-bg);
    border: 0;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 700;
}
.floating-service .main-btn { min-width: auto; padding-inline: 10px; }

.breadcrumb { width: min(1180px, calc(100% - 40px)); margin: 24px auto 0; display: flex; gap: 10px; color: var(--muted); font-size: .92rem; }
.breadcrumb a { color: var(--deep); }

.banner-wrap { padding: 34px 0 44px; }
.banner-slider {
    position: relative;
    z-index: 1;
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    padding: 14px;
    background: #fff;
    border-radius: 34px;
    box-shadow: var(--shadow);
    overflow: hidden;
}
.slider-stage { position: relative; aspect-ratio: 16 / 6.5; border-radius: 24px; overflow: hidden; background: var(--soft-bg-3); }
.slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .45s ease; }
.slide.is-active { opacity: 1; visibility: visible; }
.slide img { width: 100%; height: 100%; object-fit: contain; background: var(--soft-bg-3); }
.slider-control {
    position: absolute;
    top: 50%;
    z-index: 3;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(255,255,255,.45);
    border-radius: 50%;
    color: #fff;
    background: rgba(16,43,70,.55);
    cursor: pointer;
    transform: translateY(-50%);
}
.slider-prev { left: 28px; }
.slider-next { right: 28px; }
.slider-dots { position: absolute; left: 50%; bottom: 26px; z-index: 3; display: flex; gap: 9px; transform: translateX(-50%); }
.slider-dot { width: 12px; height: 12px; padding: 0; border: 2px solid #fff; border-radius: 50%; background: rgba(255,255,255,.45); cursor: pointer; }
.slider-dot.is-active { width: 30px; border-radius: 999px; background: #fff; }

.page-hero {
    margin-top: 34px;
    padding: clamp(30px, 5vw, 70px);
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
    align-items: center;
    gap: clamp(28px, 5vw, 68px);
    background: linear-gradient(135deg, #fff 0%, #F4F8FF 60%, #E1ECF8 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}
.page-hero__content { display: grid; gap: 18px; }
.page-hero__content p { max-width: 720px; color: var(--muted); font-size: 1.08rem; }
.page-hero__media { margin: 0; padding: 12px; background: #fff; border-radius: 24px; box-shadow: 0 16px 42px rgba(36,54,79,.10); }
.page-hero__media img { width: 100%; max-height: 380px; object-fit: contain; border-radius: 16px; }
.hero-links { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; }

.split-section {
    display: grid;
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 24px;
}
.content-panel {
    padding: clamp(24px, 4vw, 42px);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: 0 14px 38px rgba(36,54,79,.07);
}
.content-panel h2, .content-panel h3 { margin-bottom: 14px; }
.content-panel p { color: var(--muted); }
.content-panel ul { margin: 18px 0 0; padding-left: 1.2em; color: var(--text); }
.content-panel li + li { margin-top: 8px; }
.media-panel img { width: 100%; max-height: 360px; object-fit: contain; background: var(--soft-bg); border-radius: 18px; }

.info-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
.info-grid.three { grid-template-columns: repeat(3, minmax(0,1fr)); }
.info-grid.two { grid-template-columns: repeat(2, minmax(0,1fr)); }
.info-card {
    min-width: 0;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: 0 12px 32px rgba(36,54,79,.06);
}
.info-card p { color: var(--muted); margin: 0; }
.info-card .text-link { margin-top: auto; }

.notice-strip {
    padding: 22px 28px;
    color: var(--text);
    background: linear-gradient(90deg, #F4F8FF, #fff, #EDF5FF);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: 0 12px 30px rgba(36,54,79,.05);
}

.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.feature-block { padding: 32px; background: #fff; border: 1px solid var(--border); border-radius: 24px; box-shadow: 0 14px 40px rgba(36,54,79,.07); }
.feature-block figure { margin: 0 0 24px; }
.feature-block img { width: 100%; max-height: 300px; object-fit: contain; background: var(--soft-bg); border-radius: 18px; }
.feature-block p { color: var(--muted); }
.feature-block ul { padding-left: 1.2em; }

.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.review-card { padding: 24px; background: #fff; border: 1px solid var(--border); border-radius: 20px; box-shadow: 0 12px 28px rgba(36,54,79,.06); }
.review-card p { color: var(--muted); margin: 0; }
.review-card strong { display: block; color: var(--deep); margin-top: 16px; }

.faq-list { display: grid; gap: 12px; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: 16px; box-shadow: 0 10px 25px rgba(36,54,79,.05); overflow: hidden; }
.faq-item summary { cursor: pointer; list-style: none; padding: 20px 24px; color: var(--deep); font-weight: 800; min-height: 54px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; float: right; color: var(--primary); font-size: 1.35rem; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding: 0 24px 22px; color: var(--muted); margin: 0; }

.article-body { display: grid; gap: 22px; }
.article-body .content-panel p:last-child { margin-bottom: 0; }
.anchor-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.anchor-links a { padding: 8px 13px; color: var(--deep); background: var(--soft-bg); border-radius: 999px; font-weight: 700; }

.site-footer { margin-top: 80px; padding: 60px 0 0; color: var(--footer-text); background: var(--footer); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 44px; }
.site-footer h2 { color: #fff; font-size: 1.05rem; margin-bottom: 18px; }
.site-footer section > a { display: block; color: var(--footer-text); opacity: .88; margin: 9px 0; }
.site-footer p { color: rgba(234,246,255,.76); }
.footer-logo img { width: 150px; max-height: 48px; object-fit: contain; filter: brightness(0) invert(1); margin-bottom: 18px; }
.footer-app-link { font-weight: 800; color: #fff !important; }
.footer-bottom { margin-top: 42px; padding: 20px max(20px, calc((100vw - 1180px)/2)); display: flex; justify-content: space-between; gap: 24px; border-top: 1px solid rgba(234,246,255,.13); }
.footer-bottom p { margin: 0; }
.footer-bottom div { display: flex; flex-wrap: wrap; gap: 18px; }
.mobile-bottom-nav { display: none; }

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

@media (max-width: 900px) {
    :root { --header-h: 66px; }
    .desktop-header, .channel-bar { display: none; }
    .mobile-header {
        position: fixed;
        inset: 0 0 auto 0;
        z-index: 9000;
        height: var(--header-h);
        padding: 8px 14px;
        display: grid;
        grid-template-columns: 48px 1fr auto;
        align-items: center;
        gap: 10px;
        background: rgba(255,255,255,.96);
        border-bottom: 1px solid var(--border);
        backdrop-filter: blur(16px);
    }
    .menu-toggle, .drawer-close {
        min-width: 44px;
        min-height: 44px;
        border: 0;
        border-radius: 14px;
        color: var(--deep);
        background: var(--soft-bg);
        cursor: pointer;
    }
    .menu-toggle { display: grid; place-content: center; gap: 4px; padding: 0; }
    .menu-toggle span { width: 22px; height: 2px; background: var(--deep); border-radius: 999px; }
    .mobile-logo { justify-self: center; }
    .mobile-logo img { width: 128px; max-height: 42px; object-fit: contain; }
    .mobile-register { position: relative; z-index: 9100; min-width: 72px; min-height: 44px; padding: 10px 16px; }
    .drawer-mask {
        position: fixed;
        inset: 0;
        z-index: 9990;
        display: block;
        visibility: hidden;
        opacity: 0;
        pointer-events: none;
        background: rgba(16,43,70,.50);
        transition: opacity .25s ease, visibility .25s ease;
    }
    .drawer-mask.is-visible { visibility: visible; opacity: 1; pointer-events: auto; }
    .mobile-drawer {
        position: fixed;
        inset: 0 auto 0 0;
        z-index: 10000;
        width: min(84vw, 360px);
        display: flex;
        flex-direction: column;
        background: #fff;
        box-shadow: 18px 0 60px rgba(16,43,70,.22);
        transform: translateX(-105%);
        transition: transform .28s ease;
        overflow-y: auto;
        overscroll-behavior: contain;
    }
    .mobile-drawer.is-open { transform: translateX(0); }
    .drawer-head { position: sticky; top: 0; z-index: 1; padding: 14px; display: flex; align-items: center; justify-content: space-between; background: #fff; border-bottom: 1px solid var(--border); }
    .drawer-logo img { width: 140px; max-height: 46px; object-fit: contain; }
    .drawer-close { font-size: 1.6rem; }
    .drawer-nav { padding: 14px 14px 40px; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
    .drawer-nav a { min-height: 44px; padding: 10px 12px; display: flex; align-items: center; color: var(--text); background: var(--soft-bg); border-radius: 12px; font-weight: 700; }
    .drawer-nav a.active { color: #fff; background: linear-gradient(135deg, var(--bright), var(--deep)); }
    main { padding-top: var(--header-h); }
    .breadcrumb { margin-top: 22px; }
    .page-hero { margin-top: 22px; grid-template-columns: 1fr; }
    .page-hero__media { order: -1; }
    .info-grid, .info-grid.three { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .feature-row, .split-section { grid-template-columns: 1fr; }
    .review-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .mobile-bottom-nav {
        position: fixed;
        inset: auto 0 0 0;
        z-index: 8500;
        min-height: 62px;
        padding: 7px 12px calc(7px + env(safe-area-inset-bottom));
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 7px;
        background: rgba(255,255,255,.97);
        border-top: 1px solid var(--border);
        backdrop-filter: blur(16px);
    }
    .mobile-bottom-nav a { min-height: 46px; display: grid; place-items: center; color: var(--muted); border-radius: 12px; font-size: .88rem; font-weight: 700; }
    .mobile-bottom-nav a.active { color: #fff; background: linear-gradient(135deg, var(--bright), var(--deep)); }
    .site-footer { padding-bottom: 80px; }
}

@media (max-width: 640px) {
    .section-shell, .breadcrumb, .banner-slider { width: min(100% - 24px, 1180px); }
    .section { padding: 54px 0; }
    .section.compact { padding: 38px 0; }
    h1 { font-size: clamp(2rem, 11vw, 3.1rem); }
    .banner-wrap { padding: 18px 0 32px; }
    .banner-slider { padding: 8px; border-radius: 22px; }
    .slider-stage { aspect-ratio: 16 / 9; border-radius: 16px; }
    .slider-control { width: 44px; height: 44px; }
    .slider-prev { left: 15px; }
    .slider-next { right: 15px; }
    .slider-dots { bottom: 16px; }
    .page-hero { padding: 24px; border-radius: 24px; }
    .page-hero__content p { font-size: 1rem; }
    .info-grid, .info-grid.three, .info-grid.two, .review-grid, .footer-grid { grid-template-columns: 1fr; }
    .content-panel, .feature-block, .info-card, .review-card { padding: 22px; }
    .footer-bottom { flex-direction: column; }
    .drawer-nav { grid-template-columns: 1fr; }
}