:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --primary: #10AEEA;
    --deep: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --line: #CDEBFA;
    --shadow: 0 18px 46px rgba(21, 90, 157, .11);
    --shadow-small: 0 10px 28px rgba(21, 90, 157, .08);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --gradient: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    --container: 1240px;
}

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

.skip-link {
    position: fixed;
    top: 8px;
    left: 8px;
    z-index: 9999;
    transform: translateY(-160%);
    padding: 10px 14px;
    background: var(--footer);
    color: #fff;
    border-radius: 10px;
}
.skip-link:focus { transform: translateY(0); }
.container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, .95);
    border-bottom: 1px solid rgba(205, 235, 250, .9);
    backdrop-filter: blur(14px);
}
.header-inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    gap: 24px;
}
.brand-logo { flex: 0 0 auto; }
.brand-logo img { width: 138px; max-height: 48px; object-fit: contain; }
.desktop-nav {
    min-width: 0;
    margin-left: auto;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    white-space: nowrap;
}
.desktop-nav a {
    padding: 10px 9px;
    color: var(--text);
    font-size: 14px;
    border-radius: 10px;
    transition: .2s ease;
}
.desktop-nav a:hover,
.desktop-nav a.is-active { color: var(--deep); background: var(--soft); }
.header-actions { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.main-btn,
.secondary-btn,
.text-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    border-radius: 999px;
    font-weight: 700;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.main-btn {
    padding: 10px 22px;
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 10px 22px rgba(22, 136, 216, .24);
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(22, 136, 216, .32); }
.secondary-btn { padding: 10px 20px; color: var(--deep); background: #fff; border: 1px solid var(--line); }
.secondary-btn:hover { background: var(--soft); }
.text-link { min-height: auto; color: var(--deep); justify-content: flex-start; }
.text-link::after { content: "→"; }
.menu-toggle {
    display: none;
    width: 46px;
    height: 46px;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fff;
}
.menu-toggle span { display: block; width: 21px; height: 2px; margin: 5px auto; background: var(--deep); border-radius: 2px; }

.drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 1100;
    background: rgba(7, 58, 104, .45);
    opacity: 0;
    transition: opacity .22s ease;
}
.drawer-overlay.is-visible { opacity: 1; }
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1200;
    width: min(390px, 88vw);
    height: 100dvh;
    padding: 24px;
    background: #fff;
    box-shadow: -24px 0 60px rgba(7, 58, 104, .2);
    transform: translateX(105%);
    transition: transform .24s ease;
    overflow-y: auto;
}
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 12px; background: var(--soft); color: var(--deep); font-size: 28px; line-height: 1; }
.mobile-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; padding: 22px 0; }
.mobile-nav a { padding: 12px 14px; border-radius: 12px; background: var(--bg); color: var(--text); font-size: 15px; }
.mobile-nav a:hover { background: var(--soft); color: var(--deep); }
.drawer-register { width: 100%; }

.hero-slider { padding: 22px 0 0; }
.slider-shell {
    position: relative;
    overflow: hidden;
    border-radius: 30px;
    background: #dceff8;
    box-shadow: var(--shadow);
}
.slides { display: flex; transition: transform .55s ease; }
.slide { min-width: 100%; background: #dceff8; }
.slide img { width: 100%; height: clamp(260px, 43vw, 560px); object-fit: contain; background: #dceff8; }
.slider-arrow {
    position: absolute;
    top: 50%;
    z-index: 4;
    width: 48px;
    height: 48px;
    border: 0;
    border-radius: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,.9);
    color: var(--deep);
    font-size: 28px;
    box-shadow: var(--shadow-small);
}
.slider-arrow:hover { background: #fff; }
.slider-prev { left: 18px; }
.slider-next { right: 18px; }
.slider-dots { position: absolute; left: 50%; bottom: 18px; z-index: 4; display: flex; gap: 9px; transform: translateX(-50%); }
.slider-dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.65); box-shadow: 0 1px 4px rgba(0,0,0,.12); }
.slider-dot.is-active { width: 28px; border-radius: 999px; background: #fff; }

.section { padding: 78px 0; }
.section-tight { padding: 46px 0; }
.section-soft { background: var(--soft); }
.section-dark { background: var(--footer); color: var(--footer-text); }
.section-heading { max-width: 760px; margin-bottom: 34px; }
.section-heading.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow { display: inline-flex; margin-bottom: 10px; color: var(--primary); font-size: 14px; font-weight: 800; letter-spacing: .08em; }
h1, h2, h3 { margin-top: 0; color: var(--deep); line-height: 1.25; }
h1 { margin-bottom: 22px; font-size: clamp(34px, 5vw, 62px); letter-spacing: -.02em; }
h2 { margin-bottom: 16px; font-size: clamp(27px, 3.5vw, 40px); }
h3 { margin-bottom: 10px; font-size: 21px; }
p { margin: 0 0 16px; }
.lead { max-width: 820px; color: var(--muted); font-size: 18px; }
.muted { color: var(--muted); }

.intro-panel {
    position: relative;
    overflow: hidden;
    padding: 44px;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: #fff;
    box-shadow: var(--shadow-small);
}
.intro-panel::after {
    content: "";
    position: absolute;
    width: 220px;
    height: 220px;
    right: -90px;
    bottom: -100px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(53,215,255,.24), rgba(53,215,255,0));
}
.intro-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }

.pill-scroll { display: flex; gap: 12px; overflow-x: auto; padding: 4px 2px 14px; scrollbar-width: thin; }
.pill-scroll a { flex: 0 0 auto; padding: 12px 20px; border: 1px solid var(--line); border-radius: 999px; background: #fff; color: var(--deep); font-weight: 700; box-shadow: 0 7px 18px rgba(21,90,157,.06); }
.pill-scroll a:hover { background: var(--gradient); color: #fff; border-color: transparent; }

.dashboard-grid,
.card-grid,
.feedback-grid,
.faq-grid,
.category-grid,
.support-grid { display: grid; gap: 20px; }
.dashboard-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card-grid.three,
.feedback-grid,
.category-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card-grid.two,
.support-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.info-card,
.feedback-card,
.faq-card,
.category-card,
.stat-card,
.notice-card {
    position: relative;
    overflow: hidden;
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--shadow-small);
}
.info-card:hover,
.category-card:hover { transform: translateY(-3px); transition: transform .2s ease; }
.stat-card strong { display: block; margin-bottom: 10px; color: var(--primary); font-size: 28px; }
.stat-card p,
.info-card p,
.category-card p,
.faq-card p,
.feedback-card p { color: var(--muted); }
.feedback-role { display: inline-flex; margin-bottom: 14px; padding: 6px 11px; border-radius: 999px; background: var(--soft); color: var(--deep); font-size: 13px; font-weight: 800; }

.feature-split {
    display: grid;
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: center;
    gap: 46px;
}
.feature-split.reverse .feature-media { order: 2; }
.feature-split.reverse .feature-copy { order: 1; }
.feature-media {
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: #dceff8;
    box-shadow: var(--shadow);
}
.feature-media img { width: 100%; max-height: 510px; object-fit: contain; background: #dceff8; }
.feature-copy { padding: 10px 0; }
.feature-copy ul,
.check-list { margin: 20px 0 0; padding: 0; list-style: none; }
.feature-copy li,
.check-list li { position: relative; margin: 10px 0; padding-left: 28px; color: var(--muted); }
.feature-copy li::before,
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 900; }

.app-banner {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr);
    align-items: center;
    gap: 36px;
    padding: 46px;
    border-radius: 32px;
    background: linear-gradient(135deg, #ffffff, #e8f7ff);
    box-shadow: var(--shadow);
}
.app-banner img { width: 100%; max-height: 360px; object-fit: contain; }

.page-hero { padding: 64px 0 34px; }
.page-hero-card {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(280px, .92fr);
    align-items: center;
    gap: 42px;
    min-height: 430px;
    padding: 48px;
    border-radius: 32px;
    background: linear-gradient(135deg, #fff, #e8f7ff);
    box-shadow: var(--shadow);
}
.page-hero-card.no-image { display: block; min-height: auto; }
.page-hero-card img { width: 100%; max-height: 390px; object-fit: contain; border-radius: 22px; background: #dceff8; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.breadcrumbs a { color: var(--deep); }

.content-stack { display: grid; gap: 22px; }
.content-box { padding: 30px; border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-small); }
.content-box p:last-child { margin-bottom: 0; }
.media-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.media-card { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-small); }
.media-card img { width: 100%; height: 260px; object-fit: contain; background: #dceff8; }
.media-card-body { padding: 24px; }

.notice-card { background: linear-gradient(135deg, #fff, #e8f7ff); }
.notice-card strong { display: block; margin-bottom: 8px; color: var(--deep); }
.legal-panel { background: #fff; border-top: 1px solid var(--line); }
.legal-panel-inner { display: grid; grid-template-columns: minmax(220px, .7fr) minmax(0, 1.3fr); gap: 42px; align-items: start; }
.legal-copy { padding: 26px; border-radius: var(--radius-md); background: var(--soft); color: var(--muted); }

.faq-list { display: grid; gap: 14px; }
.faq-item { border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: var(--shadow-small); }
.faq-item summary { padding: 20px 24px; color: var(--deep); font-weight: 800; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; float: right; color: var(--primary); font-size: 24px; }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding: 0 24px 22px; color: var(--muted); }

.site-footer { padding: 62px 0 24px; background: var(--footer); color: var(--footer-text); }
.footer-grid { display: grid; grid-template-columns: 1.7fr repeat(3, 1fr); gap: 42px; }
.footer-logo img { width: 150px; max-height: 54px; margin-bottom: 18px; object-fit: contain; }
.site-footer h2 { color: #fff; font-size: 17px; }
.site-footer a { display: block; margin: 9px 0; color: var(--footer-text); opacity: .88; }
.site-footer a:hover { opacity: 1; color: #fff; }
.footer-brand p { max-width: 480px; opacity: .82; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; margin-top: 44px; padding-top: 22px; border-top: 1px solid rgba(234,248,255,.16); font-size: 13px; opacity: .8; }
.footer-bottom p { margin: 0; }

@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: block; }
    .header-inner { min-height: 70px; }
}

@media (max-width: 900px) {
    .section { padding: 58px 0; }
    .dashboard-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .card-grid.three,
    .feedback-grid,
    .category-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .feature-split,
    .page-hero-card,
    .app-banner,
    .legal-panel-inner { grid-template-columns: 1fr; }
    .feature-split.reverse .feature-media,
    .feature-split.reverse .feature-copy { order: initial; }
    .page-hero-card { padding: 34px; min-height: auto; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
    .container { width: min(100% - 24px, var(--container)); }
    .header-inner { gap: 10px; }
    .brand-logo img { width: 116px; }
    .header-actions { gap: 8px; }
    .header-actions .main-btn { padding: 9px 16px; min-height: 42px; }
    .menu-toggle { width: 42px; height: 42px; }
    .hero-slider { padding-top: 12px; }
    .slider-shell { border-radius: 20px; }
    .slide img { height: 235px; }
    .slider-arrow { width: 40px; height: 40px; font-size: 22px; }
    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }
    .slider-dots { bottom: 12px; }
    .section { padding: 48px 0; }
    .intro-panel,
    .page-hero-card,
    .app-banner { padding: 26px 22px; border-radius: 22px; }
    h1 { font-size: 36px; }
    h2 { font-size: 28px; }
    .lead { font-size: 16px; }
    .dashboard-grid,
    .card-grid.three,
    .card-grid.two,
    .feedback-grid,
    .faq-grid,
    .category-grid,
    .support-grid,
    .media-grid { grid-template-columns: 1fr; }
    .feature-split { gap: 26px; }
    .feature-media { border-radius: 20px; }
    .feature-media img { max-height: 340px; }
    .media-card img { height: 220px; }
    .mobile-nav { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; }
}