:root {
    --page-bg: #EAF2FB;
    --surface: #FFFFFF;
    --surface-soft: #F4F8FF;
    --surface-blue: #EDF5FF;
    --surface-deep: #E1ECF8;
    --primary: #2FA8F7;
    --primary-light: #45C7FF;
    --primary-dark: #137CD8;
    --title: #137CD8;
    --text: #24364F;
    --muted: #5D718A;
    --border: rgba(47,168,247,0.14);
    --footer: #102B46;
    --footer-text: #EAF6FF;
    --shadow: 0 18px 50px rgba(35, 91, 132, 0.10);
    --radius-lg: 30px;
    --radius-md: 22px;
    --radius-sm: 14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    background: var(--page-bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
    padding-top: 132px;
}
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, select { font: inherit; }
button { cursor: pointer; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.skip-link {
    position: fixed; left: 16px; top: -100px; z-index: 12000;
    padding: 10px 16px; background: #fff; color: var(--primary-dark); border-radius: 10px;
}
.skip-link:focus { top: 10px; }

.main-btn {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    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: 700;
    white-space: nowrap;
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(19,124,216,0.24); }
.text-link { color: var(--primary-dark); font-weight: 700; }
.text-link:hover { color: var(--primary); }

.desktop-header {
    position: fixed; inset: 0 0 auto 0; z-index: 7000;
    height: 74px;
    background: rgba(255,255,255,.92);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(18px);
}
.desktop-header__inner { height: 100%; display: grid; grid-template-columns: 210px 1fr 120px; align-items: center; gap: 24px; }
.brand-logo { display: inline-flex; width: 164px; max-height: 52px; align-items: center; }
.brand-logo img { max-height: 48px; width: auto; object-fit: contain; }
.core-nav { display: flex; align-items: center; justify-content: center; gap: 6px; min-width: 0; }
.core-nav__link {
    position: relative; padding: 14px 18px; border-radius: 12px; color: var(--muted); font-weight: 700; white-space: nowrap;
}
.core-nav__link:hover { background: var(--surface-blue); color: var(--primary-dark); }
.core-nav__link.is-active { color: var(--primary-dark); }
.core-nav__link.is-active::after {
    content: ""; position: absolute; left: 50%; bottom: 5px; width: 26px; height: 3px; border-radius: 999px;
    background: var(--primary); transform: translateX(-50%);
}
.desktop-register { justify-self: end; min-width: 96px; }

.channel-bar {
    position: fixed; top: 74px; left: 0; right: 0; z-index: 6500;
    height: 58px; background: rgba(244,248,255,.94); border-bottom: 1px solid var(--border); backdrop-filter: blur(12px);
}
.channel-bar__scroll { height: 100%; display: flex; align-items: center; gap: 8px; overflow-x: auto; scrollbar-width: none; }
.channel-bar__scroll::-webkit-scrollbar { display: none; }
.channel-pill {
    flex: 0 0 auto; padding: 7px 13px; border-radius: 999px; color: var(--muted); font-size: 14px; line-height: 1.4; white-space: nowrap;
}
.channel-pill:hover, .channel-pill.is-active { background: #fff; color: var(--primary-dark); box-shadow: 0 6px 18px rgba(36,54,79,.08); }

.mobile-header, .mobile-drawer, .drawer-mask, .mobile-bottom-nav { display: none; }
.site-main { min-height: 65vh; }

.floating-service {
    position: fixed; right: max(14px, calc((100vw - 1260px) / 2)); top: 50%; transform: translateY(-50%); z-index: 8000;
    width: 110px; display: flex; flex-direction: column; gap: 4px; padding: 12px;
    background: rgba(255,255,255,.95); border: 1px solid var(--border); border-radius: 20px; box-shadow: var(--shadow); backdrop-filter: blur(12px);
}
.floating-service a:not(.main-btn), .floating-service button {
    min-height: 40px; display: flex; align-items: center; justify-content: center; padding: 8px; border: 0; background: transparent;
    color: var(--primary-dark); border-radius: 10px; font-size: 14px;
}
.floating-service a:not(.main-btn):hover, .floating-service button:hover { background: var(--surface-blue); }
.floating-register { min-height: 40px; padding: 8px 12px; font-size: 14px; }

.section { padding: 76px 0; }
.section--tight { padding: 46px 0; }
.section--soft { background: var(--surface-soft); }
.section--white { background: var(--surface); }
.section-heading { max-width: 760px; margin: 0 auto 34px; text-align: center; }
.eyebrow { display: inline-block; margin-bottom: 8px; color: var(--primary); font-size: 14px; font-weight: 800; letter-spacing: .08em; }
h1, h2, h3 { color: var(--title); line-height: 1.35; margin-top: 0; }
h1 { font-size: clamp(34px, 5vw, 58px); margin-bottom: 20px; }
h2 { font-size: clamp(27px, 3.2vw, 40px); margin-bottom: 16px; }
h3 { font-size: 21px; margin-bottom: 12px; }
p { margin: 0 0 16px; }
.section-heading p, .page-hero p { color: var(--muted); }

.banner-wrap { padding: 28px 0 42px; background: linear-gradient(180deg, #EAF2FB 0%, #F5F9FF 100%); }
.banner-slider {
    position: relative; z-index: 1; overflow: hidden; background: #fff; border: 1px solid var(--border); border-radius: 32px;
    box-shadow: 0 24px 65px rgba(38, 89, 128, .14); aspect-ratio: 16 / 6.25;
}
.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: 48px; height: 48px; transform: translateY(-50%);
    border: 1px solid rgba(255,255,255,.65); border-radius: 50%; background: rgba(16,43,70,.42); color: #fff; font-size: 30px; line-height: 1;
    display: flex; align-items: center; justify-content: center;
}
.slider-arrow:hover { background: rgba(19,124,216,.82); }
.slider-arrow--prev { left: 20px; }
.slider-arrow--next { right: 20px; }
.slider-dots { position: absolute; left: 50%; bottom: 18px; z-index: 3; display: flex; gap: 9px; transform: translateX(-50%); }
.slider-dot { width: 11px; height: 11px; padding: 0; border: 2px solid #fff; border-radius: 50%; background: rgba(255,255,255,.45); }
.slider-dot.is-active { width: 28px; border-radius: 999px; background: #fff; }

.page-hero { padding: 72px 0 58px; background: linear-gradient(145deg, #F8FBFF 0%, #E7F2FF 60%, #DDEEFF 100%); }
.page-hero__grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr); align-items: center; gap: 52px; }
.page-hero__content { max-width: 700px; }
.page-hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 26px; }
.secondary-btn {
    min-height: 44px; display: inline-flex; align-items: center; justify-content: center; padding: 10px 22px;
    border: 1px solid rgba(19,124,216,.18); border-radius: 999px; background: #fff; color: var(--primary-dark); font-weight: 700;
}
.secondary-btn:hover { background: var(--surface-blue); }
.hero-image-card { overflow: hidden; padding: 14px; background: rgba(255,255,255,.78); border: 1px solid rgba(255,255,255,.8); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.hero-image-card img { width: 100%; max-height: 420px; object-fit: contain; border-radius: 22px; background: #fff; }

.intro-grid, .split-section { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 34px; align-items: center; }
.content-card, .feature-card, .info-card, .quote-card, .faq-card, .notice-card {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); box-shadow: 0 14px 40px rgba(38,89,128,.07);
}
.content-card { padding: 30px; }
.content-image { overflow: hidden; padding: 10px; background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow); }
.content-image img { width: 100%; max-height: 420px; object-fit: contain; border-radius: 16px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.feature-grid--4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.feature-card { padding: 25px; }
.feature-number { display: inline-flex; align-items: center; justify-content: center; min-width: 42px; height: 42px; padding: 0 12px; margin-bottom: 16px; border-radius: 13px; background: var(--surface-blue); color: var(--primary-dark); font-weight: 800; }
.feature-card p, .info-card p, .quote-card p { color: var(--muted); }
.quick-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.quick-card { padding: 24px; background: #fff; border: 1px solid var(--border); border-radius: 20px; transition: transform .2s ease, box-shadow .2s ease; }
.quick-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.quick-card p { min-height: 52px; color: var(--muted); }
.info-strip { padding: 26px 30px; background: linear-gradient(135deg, #137CD8 0%, #2FA8F7 58%, #45C7FF 100%); color: #fff; border-radius: 26px; box-shadow: 0 20px 45px rgba(19,124,216,.18); }
.info-strip p { margin: 0; }
.dashboard-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; }
.info-card { padding: 24px; }
.info-card h3 { font-size: 19px; }
.media-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 22px; }
.media-card { overflow: hidden; background: #fff; border: 1px solid var(--border); border-radius: 24px; box-shadow: 0 14px 40px rgba(38,89,128,.07); }
.media-card__image { aspect-ratio: 16/9; padding: 10px; background: var(--surface-soft); }
.media-card__image img { width: 100%; height: 100%; object-fit: contain; border-radius: 15px; background: #fff; }
.media-card__body { padding: 24px; }
.media-card__body p { color: var(--muted); }
.service-list { display: grid; gap: 10px; margin: 18px 0; padding: 0; list-style: none; }
.service-list li { position: relative; padding-left: 24px; color: var(--muted); }
.service-list li::before { content: ""; position: absolute; left: 0; top: .72em; width: 10px; height: 10px; border-radius: 50%; background: linear-gradient(135deg, var(--primary-light), var(--primary-dark)); }
.quote-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.quote-card { padding: 25px; }
.quote-card strong { display: block; margin-top: 16px; color: var(--primary-dark); }
.faq-list { display: grid; gap: 14px; max-width: 980px; margin: 0 auto; }
.faq-card { overflow: hidden; }
.faq-card summary { position: relative; padding: 21px 54px 21px 24px; cursor: pointer; color: var(--title); font-weight: 800; list-style: none; }
.faq-card summary::-webkit-details-marker { display: none; }
.faq-card summary::after { content: "+"; position: absolute; right: 23px; top: 50%; transform: translateY(-50%); font-size: 25px; color: var(--primary); }
.faq-card[open] summary::after { content: "−"; }
.faq-card p { padding: 0 24px 22px; color: var(--muted); }
.notice-card { padding: 28px; border-left: 5px solid var(--primary); background: linear-gradient(135deg, #fff, #F1F8FF); }
.notice-card p:last-child { margin-bottom: 0; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.breadcrumbs a:hover { color: var(--primary-dark); }
.article-stack { display: grid; gap: 26px; }
.article-block { padding: 30px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); box-shadow: 0 14px 40px rgba(38,89,128,.06); }
.article-block p { color: var(--muted); }
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.step-card { position: relative; padding: 28px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); }
.step-card::before { counter-increment: step; content: counter(step); display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; margin-bottom: 16px; border-radius: 14px; background: var(--surface-blue); color: var(--primary-dark); font-weight: 900; }
.table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); }
.info-table { width: 100%; min-width: 680px; border-collapse: collapse; }
.info-table th, .info-table td { padding: 16px 18px; text-align: left; border-bottom: 1px solid var(--border); }
.info-table th { color: var(--title); background: var(--surface-soft); }
.info-table td { color: var(--muted); }

.site-footer { background: var(--footer); color: var(--footer-text); padding: 60px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.25fr; gap: 36px; }
.footer-logo { display: inline-flex; width: 170px; padding: 8px 12px; background: #fff; border-radius: 14px; margin-bottom: 18px; }
.footer-logo img { max-height: 44px; object-fit: contain; }
.site-footer h2 { color: #fff; font-size: 18px; }
.site-footer p, .site-footer a { color: rgba(234,246,255,.78); }
.site-footer a:hover { color: #fff; }
.footer-links { display: grid; gap: 9px; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: 16px 28px; padding-top: 28px; margin-top: 38px; border-top: 1px solid rgba(255,255,255,.12); font-size: 14px; }

@media (max-width: 1260px) {
    .floating-service { display: none; }
}
@media (max-width: 980px) {
    .container { width: min(100% - 30px, 1180px); }
    .desktop-header__inner { grid-template-columns: 170px 1fr 102px; gap: 12px; }
    .core-nav__link { padding-inline: 11px; }
    .feature-grid--4, .dashboard-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .media-grid, .feature-grid, .quote-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 760px) {
    body { padding-top: 64px; padding-bottom: calc(76px + env(safe-area-inset-bottom)); }
    .desktop-header, .channel-bar { display: none; }
    .mobile-header {
        position: fixed; inset: 0 0 auto 0; z-index: 9000; height: 64px; display: grid; grid-template-columns: 54px 1fr 86px; align-items: center; gap: 8px;
        padding: 0 12px; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--border); backdrop-filter: blur(16px);
    }
    .mobile-menu-button { width: 44px; height: 44px; display: flex; flex-direction: column; justify-content: center; gap: 5px; padding: 10px; border: 0; background: var(--surface-soft); border-radius: 12px; }
    .mobile-menu-button span { width: 100%; height: 2px; border-radius: 3px; background: var(--primary-dark); }
    .mobile-logo { justify-self: center; max-width: 145px; max-height: 50px; overflow: hidden; }
    .mobile-logo img { max-height: 46px; width: auto; object-fit: contain; }
    .mobile-register { min-height: 42px; padding: 8px 17px; font-size: 14px; justify-self: end; z-index: 9100; }
    .drawer-mask {
        position: fixed; inset: 0; z-index: 9990; display: block; visibility: hidden; opacity: 0; pointer-events: none;
        background: rgba(7,31,54,.48); transition: opacity .25s ease, visibility .25s ease;
    }
    .drawer-mask.is-visible { visibility: visible; opacity: 1; pointer-events: auto; }
    .mobile-drawer {
        position: fixed; top: 0; bottom: 0; left: 0; z-index: 10000; display: flex; flex-direction: column; width: min(86vw, 360px);
        background: #fff; transform: translateX(-105%); transition: transform .28s ease; box-shadow: 16px 0 48px rgba(5,27,48,.2); overflow: hidden;
    }
    .mobile-drawer.is-open { transform: translateX(0); }
    .mobile-drawer__head { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
    .drawer-logo { width: 150px; }
    .drawer-logo img { max-height: 46px; object-fit: contain; }
    .drawer-close { width: 44px; height: 44px; border: 0; border-radius: 12px; background: var(--surface-soft); color: var(--primary-dark); font-size: 30px; line-height: 1; }
    .mobile-drawer__nav { flex: 1; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); align-content: start; gap: 8px; padding: 16px; overflow-y: auto; }
    .drawer-link { min-height: 46px; display: flex; align-items: center; padding: 10px 13px; border-radius: 12px; background: var(--surface-soft); color: var(--muted); font-size: 15px; }
    .drawer-link:hover, .drawer-link.is-active { background: var(--surface-blue); color: var(--primary-dark); font-weight: 700; }
    .mobile-bottom-nav {
        position: fixed; left: 0; right: 0; bottom: 0; z-index: 8500; display: grid; grid-template-columns: repeat(4,1fr);
        padding-bottom: env(safe-area-inset-bottom); background: rgba(255,255,255,.97); border-top: 1px solid var(--border); box-shadow: 0 -10px 30px rgba(27,66,99,.10); backdrop-filter: blur(14px);
    }
    .mobile-bottom-nav a { min-height: 62px; display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: 14px; }
    .mobile-bottom-nav a.is-active { color: var(--primary-dark); font-weight: 800; background: var(--surface-soft); }
    .section { padding: 56px 0; }
    .section--tight { padding: 38px 0; }
    .banner-wrap { padding: 18px 0 30px; }
    .banner-slider { border-radius: 22px; aspect-ratio: 16 / 8.4; }
    .slider-arrow { width: 44px; height: 44px; font-size: 26px; }
    .slider-arrow--prev { left: 10px; }
    .slider-arrow--next { right: 10px; }
    .slider-dots { bottom: 10px; }
    .page-hero { padding: 52px 0 42px; }
    .page-hero__grid, .intro-grid, .split-section { grid-template-columns: 1fr; gap: 28px; }
    .page-hero__grid { grid-template-areas: "content" "image"; }
    .page-hero__content { grid-area: content; }
    .hero-image-card { grid-area: image; }
    .quick-grid, .media-grid, .feature-grid, .feature-grid--4, .dashboard-grid, .quote-grid, .steps { grid-template-columns: 1fr; }
    .quick-card p { min-height: auto; }
    .section-heading { text-align: left; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; gap: 9px; }
    .content-card, .article-block { padding: 24px; }
}

@media (max-width: 420px) {
    .container { width: min(100% - 22px, 1180px); }
    .mobile-header { grid-template-columns: 50px 1fr 78px; padding-inline: 8px; }
    .mobile-logo { max-width: 128px; }
    .mobile-register { padding-inline: 14px; }
    h1 { font-size: 34px; }
    h2 { font-size: 28px; }
    .mobile-drawer__nav { grid-template-columns: 1fr; }
    .page-hero__actions { align-items: stretch; }
    .page-hero__actions a { flex: 1 1 100%; }
}