:root {
    --page-bg: #E6EBF2;
    --header-bg: #F5F7FB;
    --surface: #FFFFFF;
    --surface-soft: #EEF2F7;
    --surface-muted: #DDE4EE;
    --brand: #289CFF;
    --brand-dark: #177FD8;
    --nav: #4E5F7A;
    --text: #243447;
    --text-soft: #66788A;
    --text-muted: #8A9AAF;
    --border: rgba(40,156,255,.16);
    --shadow: 0 14px 36px rgba(56,92,138,.12);
    --shadow-strong: 0 18px 40px rgba(56,92,138,.16);
    --radius-lg: 24px;
    --radius-md: 18px;
    --radius-sm: 12px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--page-bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "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 { max-width: 100%; }
button, input, textarea, select { font: inherit; }
button { color: inherit; }

.section-shell {
    width: min(1200px, calc(100% - 40px));
    margin-left: auto;
    margin-right: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20000;
    background: rgba(245,247,251,.96);
    border-bottom: 1px solid rgba(78,95,122,.10);
    backdrop-filter: blur(14px);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 72px;
}
.logo { flex: 0 0 auto; display: inline-flex; align-items: center; }
.logo img { width: auto; max-width: 150px; max-height: 52px; display: block; }
.nav-wrap { flex: 1 1 auto; min-width: 0; display: flex; justify-content: center; }
.desktop-nav { display: flex; align-items: center; gap: 18px; white-space: nowrap; flex-wrap: nowrap; }
.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    min-height: 72px;
    padding: 0 2px;
    border: 0;
    background: transparent;
    color: var(--nav);
    cursor: pointer;
    font-weight: 650;
}
.nav-link::after {
    content: "";
    position: absolute;
    left: 2px;
    right: 2px;
    bottom: 10px;
    height: 3px;
    border-radius: 999px;
    background: var(--brand);
    transform: scaleX(0);
    transition: transform .2s ease;
}
.nav-link:hover, .nav-link.active, .dropdown.active > .nav-link, .more-dropdown.active > .nav-link { color: var(--brand); }
.nav-link:hover::after, .nav-link.active::after, .dropdown.active > .nav-link::after, .more-dropdown.active > .nav-link::after { transform: scaleX(1); }
.header-action { flex: 0 0 auto; display: flex; align-items: center; }
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 11px 24px;
    border: 0;
    border-radius: 999px;
    background: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%);
    color: #FFFFFF;
    font-weight: 750;
    box-shadow: 0 10px 24px rgba(36,155,255,.25);
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(36,155,255,.32); }
.header-register { min-width: 88px; min-height: 42px; padding: 9px 22px; }
.dropdown, .more-dropdown { position: relative; }
.dropdown-menu, .more-menu {
    position: absolute;
    top: calc(100% - 6px);
    left: 50%;
    min-width: 190px;
    padding: 8px;
    background: #FFFFFF;
    border: 1px solid rgba(40,156,255,.12);
    border-radius: 14px;
    box-shadow: 0 18px 38px rgba(56,92,138,.16);
    z-index: 30000;
    opacity: 0;
    visibility: hidden;
    transform: translate(-50%, 10px);
    transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
}
.more-menu { left: auto; right: 0; transform: translate(0, 10px); min-width: 210px; }
.dropdown:hover .dropdown-menu, .more-dropdown:hover .more-menu,
.dropdown.menu-open .dropdown-menu, .more-dropdown.menu-open .more-menu {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
}
.more-dropdown:hover .more-menu, .more-dropdown.menu-open .more-menu { transform: translate(0, 0); }
.dropdown-menu a, .more-menu a {
    display: block;
    padding: 10px 14px;
    color: var(--nav);
    border-radius: 10px;
    white-space: nowrap;
    font-weight: 600;
}
.dropdown-menu a:hover, .more-menu a:hover { color: var(--brand); background: rgba(40,156,255,.08); }
.mobile-menu-button { display: none; }

.site-main { padding-bottom: 72px; }
.banner-slider {
    max-width: 1200px;
    margin: 28px auto 36px;
    border-radius: 20px;
    background: #FFFFFF;
    box-shadow: 0 18px 40px rgba(56,92,138,.12);
    overflow: hidden;
    position: relative;
    isolation: isolate;
}
.slider-track { position: relative; aspect-ratio: 16 / 6.3; min-height: 260px; background: #FFFFFF; }
.slide { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .45s ease; }
.slide.is-active { opacity: 1; pointer-events: auto; }
.slide img { width: 100%; height: 100%; object-fit: contain; background: #FFFFFF; display: block; }
.slide-copy {
    position: absolute;
    left: clamp(20px, 5vw, 64px);
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    width: min(460px, 44%);
    padding: 24px;
    border-radius: 18px;
    background: rgba(245,247,251,.86);
    box-shadow: 0 18px 40px rgba(36,52,71,.12);
    backdrop-filter: blur(10px);
}
.slide-copy span { color: var(--brand); font-weight: 750; }
.slide-copy h2 { margin: 7px 0 8px; color: var(--text); font-size: clamp(24px, 3vw, 42px); line-height: 1.25; }
.slide-copy p { margin: 0; color: var(--text-soft); }
.slider-arrow {
    position: absolute;
    top: 50%;
    z-index: 4;
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 50%;
    background: rgba(255,255,255,.90);
    color: var(--brand);
    box-shadow: 0 8px 20px rgba(56,92,138,.16);
    cursor: pointer;
    transform: translateY(-50%);
}
.slider-arrow:hover { background: #FFFFFF; }
.slider-prev { left: 16px; }
.slider-next { right: 16px; }
.slider-dots { position: absolute; left: 50%; bottom: 14px; z-index: 4; display: flex; gap: 9px; transform: translateX(-50%); }
.slider-dot { width: 9px; height: 9px; padding: 0; border: 0; border-radius: 50%; background: rgba(78,95,122,.35); cursor: pointer; }
.slider-dot.is-active { width: 26px; border-radius: 999px; background: var(--brand); }

.home-section, .content-section { margin-top: 30px; padding: clamp(28px, 5vw, 56px); border-radius: var(--radius-lg); }
.home-section { background: rgba(255,255,255,.60); border: 1px solid rgba(255,255,255,.60); }
.content-section { background: rgba(255,255,255,.64); border: 1px solid rgba(255,255,255,.7); }
.section-heading { max-width: 760px; margin-bottom: 26px; }
.section-heading h2, .compact-heading h2, .content-section h2, .inner-hero h1, .compliance-strip h2 { margin: 6px 0 12px; color: var(--brand); line-height: 1.28; }
.section-heading h2, .content-section h2 { font-size: clamp(25px, 3vw, 38px); }
.section-heading p, .hero-lead, .content-section p { color: var(--text-soft); }
.section-kicker, .eyebrow { color: var(--brand); font-weight: 800; letter-spacing: .08em; font-size: 14px; }
.card-grid { display: grid; gap: 20px; }
.four-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.three-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.two-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card, .zone-card, .info-card, .review-card, .prose-card, .info-panel {
    background: rgba(255,255,255,.92);
    border: 1px solid var(--border);
    box-shadow: 0 14px 36px rgba(56,92,138,.10);
    border-radius: var(--radius-md);
}
.card, .zone-card, .info-card { padding: 24px; }
.card h3, .zone-card h3, .info-card h3 { margin: 8px 0 10px; color: var(--text); }
.card p, .zone-card p, .info-card p { margin: 0; color: var(--text-soft); }
.card-number { display: inline-flex; color: var(--brand); font-weight: 800; }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--brand); font-weight: 750; margin-top: 15px; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }
.media-card { overflow: hidden; padding: 0; }
.media-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: contain; background: var(--surface); display: block; }
.media-card .media-card-copy { padding: 22px; }
.welcome-grid, .app-layout, .security-layout, .about-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 30px; align-items: center; }
.content-img { width: 100%; height: auto; max-height: 520px; object-fit: contain; background: #FFFFFF; border-radius: var(--radius-md); display: block; }
.image-frame { padding: 12px; border-radius: var(--radius-lg); background: rgba(255,255,255,.92); box-shadow: var(--shadow); }
.feature-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 20px; }
.feature-pill { padding: 16px; border-radius: 14px; background: var(--surface-soft); border: 1px solid rgba(40,156,255,.10); }
.feature-pill strong { display: block; color: var(--brand); margin-bottom: 4px; }
.notice-list { display: grid; gap: 14px; }
.notice-item { display: grid; grid-template-columns: auto 1fr; gap: 14px; align-items: start; padding: 18px; border-radius: 16px; background: #FFFFFF; border: 1px solid var(--border); }
.notice-date { color: var(--brand); font-weight: 800; }
.notice-item h3 { margin: 0 0 4px; color: var(--text); }
.notice-item p { margin: 0; color: var(--text-soft); }
.steps-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.step-card { padding: 22px; border-radius: var(--radius-md); background: #FFFFFF; border: 1px solid var(--border); }
.step-card span { display: inline-flex; width: 38px; height: 38px; align-items: center; justify-content: center; border-radius: 50%; background: rgba(40,156,255,.10); color: var(--brand); font-weight: 800; }
.step-card h3 { margin: 14px 0 6px; }
.review-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.review-card { margin: 0; padding: 24px; }
.review-card p { margin: 0 0 16px; color: var(--text); }
.review-card footer { color: var(--text-muted); font-size: 14px; }
.faq-list { display: grid; gap: 14px; }
.faq-item { background: #FFFFFF; border: 1px solid var(--border); border-radius: 16px; padding: 0 20px; }
.faq-item summary { cursor: pointer; padding: 18px 30px 18px 0; color: var(--text); font-weight: 750; list-style: none; position: relative; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 0; top: 50%; color: var(--brand); font-size: 24px; transform: translateY(-50%); }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { margin: 0 0 18px; color: var(--text-soft); }

.inner-main { padding-top: 28px; }
.inner-hero {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 34px;
    align-items: center;
    padding: clamp(30px, 6vw, 64px);
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, rgba(255,255,255,.92), rgba(238,242,247,.82));
    border: 1px solid rgba(255,255,255,.72);
    box-shadow: var(--shadow);
}
.inner-hero h1 { font-size: clamp(34px, 5vw, 58px); }
.hero-lead { font-size: 18px; max-width: 700px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin-top: 24px; }
.hero-media { padding: 12px; border-radius: var(--radius-lg); background: #FFFFFF; box-shadow: var(--shadow); }
.two-column-section { display: grid; grid-template-columns: 1.2fr .8fr; gap: 28px; align-items: start; }
.info-panel { padding: 26px; }
.info-panel h3 { margin-top: 0; color: var(--brand); }
.check-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 26px; color: var(--text-soft); }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--brand); font-weight: 900; }
.split-panel { display: grid; grid-template-columns: .9fr 1.1fr; gap: 30px; align-items: center; }
.split-copy { min-width: 0; }
.step-list { counter-reset: step; margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 14px; }
.step-list li { counter-increment: step; position: relative; padding: 16px 18px 16px 58px; border-radius: 14px; background: #FFFFFF; border: 1px solid var(--border); color: var(--text-soft); }
.step-list li::before { content: counter(step); position: absolute; left: 16px; top: 15px; width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; background: rgba(40,156,255,.12); color: var(--brand); font-weight: 800; }
.prose-card { padding: 28px; }
.prose-card p:first-child { margin-top: 0; }
.prose-card p:last-child { margin-bottom: 0; }
.compliance-strip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    margin-top: 30px;
    padding: 30px;
    border-radius: var(--radius-lg);
    background: #DDE4EE;
    border: 1px solid rgba(40,156,255,.12);
}
.compliance-strip h2 { font-size: clamp(24px, 3vw, 34px); }
.compliance-strip p { color: var(--text-soft); margin-bottom: 0; }
.outline-btn { display: inline-flex; flex: 0 0 auto; align-items: center; justify-content: center; min-height: 44px; padding: 10px 20px; border: 1px solid var(--brand); border-radius: 999px; color: var(--brand); font-weight: 750; background: rgba(255,255,255,.45); }

.contact-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.contact-card { padding: 24px; border-radius: var(--radius-md); background: #FFFFFF; border: 1px solid var(--border); }
.contact-card h3 { margin-top: 0; }
.contact-form { display: grid; gap: 16px; }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.field { display: grid; gap: 8px; }
.field label { font-weight: 700; color: var(--text); }
.field input, .field textarea, .field select { width: 100%; border: 1px solid rgba(78,95,122,.18); border-radius: 12px; padding: 13px 14px; background: #FFFFFF; color: var(--text); outline: none; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(40,156,255,.10); }
.field textarea { min-height: 150px; resize: vertical; }

.site-footer { background: #243447; color: #EAF3FF; padding-top: 54px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 36px; }
.footer-brand img { width: auto; max-width: 150px; max-height: 52px; display: block; margin-bottom: 18px; }
.footer-brand p { max-width: 460px; color: rgba(234,243,255,.75); }
.site-footer h2 { margin: 0 0 16px; color: #FFFFFF; font-size: 18px; }
.site-footer a { display: block; margin: 9px 0; color: rgba(234,243,255,.78); }
.site-footer a:hover { color: #FFFFFF; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 38px; padding-top: 22px; padding-bottom: 26px; border-top: 1px solid rgba(234,243,255,.12); }
.footer-bottom p { margin: 0; color: rgba(234,243,255,.68); font-size: 14px; }
.footer-bottom p:first-child { max-width: 780px; }

.drawer-overlay { position: fixed; inset: 0; z-index: 40000; background: rgba(20,35,54,.45); opacity: 0; transition: opacity .24s ease; }
.drawer-overlay.is-visible { opacity: 1; }
.mobile-drawer { position: fixed; left: 0; top: 0; bottom: 0; z-index: 50000; width: min(84vw, 320px); background: #FFFFFF; box-shadow: 18px 0 40px rgba(36,52,71,.20); transform: translateX(-105%); transition: transform .28s ease; overflow-y: auto; }
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding: 18px; border-bottom: 1px solid rgba(78,95,122,.10); }
.drawer-logo img { max-height: 44px; max-width: 135px; display: block; }
.drawer-close { width: 40px; height: 40px; border: 0; border-radius: 50%; background: var(--surface-soft); color: var(--nav); font-size: 28px; cursor: pointer; }
.drawer-nav { padding: 12px; }
.drawer-nav a { display: block; padding: 12px 14px; border-radius: 10px; color: var(--nav); font-weight: 650; }
.drawer-nav a:hover { color: var(--brand); background: rgba(40,156,255,.08); }

@media (max-width: 1100px) {
    .desktop-nav { gap: 13px; }
    .nav-link { font-size: 14px; }
    .four-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .review-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 900px) {
    .desktop-nav, .nav-wrap { display: none; }
    .mobile-menu-button {
        display: inline-flex;
        width: 44px;
        height: 44px;
        flex: 0 0 auto;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        border: 0;
        border-radius: 12px;
        background: #FFFFFF;
        box-shadow: 0 8px 20px rgba(56,92,138,.10);
        cursor: pointer;
    }
    .mobile-menu-button span { width: 21px; height: 2px; margin: 0 auto; border-radius: 999px; background: var(--nav); }
    .header-inner { display: grid; grid-template-columns: 1fr auto 1fr; gap: 12px; min-height: 66px; }
    .header-inner .logo { justify-self: center; }
    .header-action { justify-self: end; }
    .logo img { max-height: 44px; max-width: 130px; }
    .header-register { min-width: 76px; min-height: 40px; padding: 8px 18px; }
    .inner-hero, .two-column-section, .split-panel, .welcome-grid, .app-layout, .security-layout, .about-layout { grid-template-columns: 1fr; }
    .hero-media { order: -1; }
    .three-grid, .steps-grid, .contact-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-brand { grid-column: 1 / -1; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
    .slide-copy { width: min(500px, calc(100% - 120px)); }
}

@media (max-width: 640px) {
    .section-shell { width: min(100% - 24px, 1200px); }
    .header-inner { width: min(100% - 18px, 1200px); }
    .header-register { min-width: 70px; min-height: 38px; padding: 7px 15px; font-size: 14px; }
    .mobile-menu-button { width: 40px; height: 40px; }
    .banner-slider { margin: 16px 12px 24px; border-radius: 16px; }
    .slider-track { aspect-ratio: auto; min-height: 420px; }
    .slide { display: flex; flex-direction: column; background: #FFFFFF; }
    .slide img { height: 238px; object-fit: contain; }
    .slide-copy { position: static; width: auto; transform: none; margin: 0; border-radius: 0; box-shadow: none; background: #FFFFFF; padding: 20px 52px 44px; }
    .slide-copy h2 { font-size: 25px; }
    .slider-arrow { width: 38px; height: 38px; top: 120px; }
    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }
    .slider-dots { bottom: 16px; }
    .home-section, .content-section { padding: 24px 18px; border-radius: 18px; }
    .inner-hero { padding: 24px 18px; border-radius: 18px; }
    .inner-hero h1 { font-size: 34px; }
    .hero-lead { font-size: 16px; }
    .four-grid, .three-grid, .two-grid, .review-grid, .steps-grid, .contact-grid, .feature-list, .footer-grid, .form-row { grid-template-columns: 1fr; }
    .footer-brand { grid-column: auto; }
    .compliance-strip { flex-direction: column; align-items: flex-start; padding: 24px 18px; }
    .outline-btn { width: 100%; }
    .hero-actions { align-items: stretch; }
    .hero-actions .main-btn, .hero-actions .text-link { width: 100%; justify-content: center; }
    .site-main { padding-bottom: 48px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}