* {
    box-sizing: border-box;
}
:root {
    --page-bg: #E6EBF2;
    --nav-bg: #F5F7FB;
    --white: #FFFFFF;
    --soft: #EEF2F7;
    --soft-2: #DDE4EE;
    --brand: #289CFF;
    --nav-text: #4E5F7A;
    --text: #243447;
    --muted: #66788A;
    --hint: #8A9AAF;
    --border: rgba(40,156,255,0.16);
    --shadow: 0 14px 36px rgba(56,92,138,0.12);
    --button: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%);
    --footer: #243447;
    --footer-text: #EAF3FF;
}
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;
    padding-top: 76px;
}
a {
    color: inherit;
    text-decoration: none;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
button {
    font: inherit;
}
.container {
    width: min(1200px, calc(100% - 40px));
    margin: 0 auto;
}
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 9999;
    background: var(--nav-bg);
    border-bottom: 1px solid rgba(40,156,255,0.12);
    box-shadow: 0 10px 26px rgba(56,92,138,0.08);
}
.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 {
    max-height: 52px;
    width: auto;
    display: block;
}
.nav-wrap {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    justify-content: center;
}
.nav {
    display: flex;
    align-items: center;
    gap: 18px;
    white-space: nowrap;
    flex-wrap: nowrap;
}
.nav-link,
.nav a {
    color: var(--nav-text);
    font-weight: 700;
    font-size: 15px;
    position: relative;
    border: 0;
    background: transparent;
    cursor: pointer;
    padding: 23px 0;
}
.nav-link:hover,
.nav-link.active,
.nav a:hover,
.nav a.active {
    color: var(--brand);
}
.nav-link.active::after,
.nav a.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 15px;
    height: 3px;
    border-radius: 3px;
    background: var(--brand);
}
.header-action {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
}
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 22px;
    border-radius: 999px;
    background: var(--button);
    color: #FFFFFF;
    font-weight: 800;
    box-shadow: 0 12px 24px rgba(36,155,255,0.25);
    border: 0;
    white-space: nowrap;
}
.main-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 16px 30px rgba(36,155,255,0.32);
}
.text-link {
    color: var(--brand);
    font-weight: 800;
}
.dropdown,
.more-dropdown {
    position: relative;
}
.dropdown-menu,
.more-menu {
    position: absolute;
    top: 100%;
    left: -18px;
    min-width: 188px;
    background: #FFFFFF;
    border: 1px solid rgba(40,156,255,0.12);
    border-radius: 14px;
    box-shadow: 0 18px 38px rgba(56,92,138,0.16);
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: .22s ease;
    overflow: hidden;
}
.more-menu {
    left: auto;
    right: 0;
}
.dropdown:hover .dropdown-menu,
.dropdown.open .dropdown-menu,
.more-dropdown:hover .more-menu,
.more-dropdown.open .more-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown-menu a,
.more-menu a {
    display: block;
    padding: 12px 16px;
    color: #4E5F7A;
    white-space: nowrap;
    font-size: 14px;
    font-weight: 700;
}
.dropdown-menu a:hover,
.more-menu a:hover,
.dropdown-menu a.active,
.more-menu a.active {
    color: #289CFF;
    background: rgba(40,156,255,0.08);
}
.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 0;
    background: rgba(40,156,255,0.10);
    border-radius: 12px;
    padding: 10px;
    flex: 0 0 auto;
}
.menu-toggle span {
    display: block;
    height: 2px;
    margin: 5px 0;
    background: var(--brand);
    border-radius: 2px;
}
.drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(36,52,71,0.38);
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: .25s ease;
}
.mobile-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: min(84vw, 320px);
    height: 100vh;
    background: #FFFFFF;
    z-index: 10001;
    transform: translateX(-105%);
    transition: transform .28s ease;
    box-shadow: 20px 0 42px rgba(36,52,71,0.18);
    overflow-y: auto;
}
.drawer-open .drawer-overlay {
    opacity: 1;
    visibility: visible;
}
.drawer-open .mobile-drawer {
    transform: translateX(0);
}
.drawer-open {
    overflow: hidden;
}
.drawer-head {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    background: #F5F7FB;
}
.drawer-logo img {
    max-height: 48px;
    width: auto;
}
.drawer-close {
    width: 38px;
    height: 38px;
    border: 0;
    border-radius: 50%;
    color: #FFFFFF;
    background: var(--button);
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
}
.drawer-nav {
    display: grid;
    padding: 14px;
}
.drawer-nav a {
    padding: 13px 14px;
    border-radius: 12px;
    color: var(--nav-text);
    font-weight: 800;
}
.drawer-nav a:hover,
.drawer-nav a.active {
    color: var(--brand);
    background: rgba(40,156,255,0.08);
}
.site-main {
    min-height: 60vh;
}
.banner-slider {
    max-width: 1200px;
    margin: 28px auto 36px;
    border-radius: 20px;
    background: #FFFFFF;
    box-shadow: 0 18px 40px rgba(56,92,138,0.12);
    overflow: hidden;
    position: relative;
    min-height: 360px;
}
.slides {
    position: relative;
    height: clamp(300px, 42vw, 520px);
}
.slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity .45s ease;
    background: #FFFFFF;
}
.slide.active {
    opacity: 1;
    pointer-events: auto;
}
.slide img,
.banner-slider img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #FFFFFF;
}
.slide-copy {
    position: absolute;
    left: clamp(18px, 4vw, 48px);
    bottom: clamp(18px, 4vw, 46px);
    width: min(420px, calc(100% - 36px));
    padding: 20px 22px;
    border-radius: 18px;
    background: rgba(255,255,255,0.88);
    border: 1px solid rgba(40,156,255,0.16);
    box-shadow: 0 14px 34px rgba(56,92,138,0.13);
}
.slide-copy strong {
    display: inline-flex;
    color: var(--brand);
    margin-bottom: 6px;
}
.slide-copy h1,
.slide-copy h2 {
    margin: 0 0 8px;
    color: var(--brand);
    font-size: clamp(24px, 4vw, 42px);
    line-height: 1.2;
}
.slide-copy p {
    margin: 0;
    color: var(--text);
}
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 4;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 0;
    background: rgba(255,255,255,0.9);
    color: var(--brand);
    box-shadow: 0 10px 26px rgba(56,92,138,0.14);
    cursor: pointer;
    font-size: 24px;
    font-weight: 800;
}
.slider-prev { left: 18px; }
.slider-next { right: 18px; }
.slider-dots {
    position: absolute;
    left: 50%;
    bottom: 14px;
    transform: translateX(-50%);
    z-index: 4;
    display: flex;
    gap: 8px;
}
.slider-dot {
    width: 10px;
    height: 10px;
    border: 0;
    border-radius: 50%;
    background: rgba(40,156,255,0.28);
    cursor: pointer;
}
.slider-dot.active {
    width: 28px;
    border-radius: 999px;
    background: var(--brand);
}
.section {
    padding: 44px 0;
}
.section.compact {
    padding: 28px 0;
}
.section-head {
    margin-bottom: 22px;
    max-width: 820px;
}
h1,
h2,
h3,
.section-title {
    color: #289CFF;
}
h1,
h2,
h3,
p {
    margin-top: 0;
}
h1 {
    font-size: clamp(32px, 5vw, 54px);
    line-height: 1.16;
    margin-bottom: 16px;
}
h2,
.section-title {
    font-size: clamp(24px, 3vw, 34px);
    line-height: 1.22;
    margin-bottom: 12px;
}
h3 {
    font-size: 20px;
    margin-bottom: 10px;
}
p {
    color: var(--text);
}
.lead,
.muted {
    color: var(--muted);
}
.hint {
    color: var(--hint);
}
.card,
.zone-card,
.info-card,
.review-card,
.faq-card,
.notice-card,
.page-hero,
.step-card {
    background: rgba(255,255,255,0.92);
    border: 1px solid rgba(40,156,255,0.16);
    box-shadow: 0 14px 36px rgba(56,92,138,0.10);
    border-radius: 20px;
}
.card,
.info-card,
.review-card,
.faq-card,
.notice-card,
.step-card {
    padding: 24px;
}
.card p:last-child,
.info-card p:last-child,
.review-card p:last-child,
.faq-card p:last-child,
.notice-card p:last-child,
.step-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)); }
.grid-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.split {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 28px;
    align-items: center;
}
.split.reverse {
    grid-template-columns: .95fr 1.05fr;
}
.content-img,
.zone-card img,
.app-section img,
.banner-slider img,
.image-card img {
    max-width: 100%;
    height: auto;
}
.image-card {
    border-radius: 22px;
    overflow: hidden;
    background: #FFFFFF;
    border: 1px solid rgba(40,156,255,0.16);
    box-shadow: var(--shadow);
}
.image-card img {
    width: 100%;
    object-fit: contain;
    background: #FFFFFF;
}
.hero-card {
    padding: 34px;
}
.kicker,
.tag,
.number {
    color: var(--brand);
    font-weight: 900;
}
.kicker {
    display: inline-flex;
    margin-bottom: 10px;
}
.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 16px 0 0;
}
.tag {
    display: inline-flex;
    align-items: center;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(40,156,255,0.10);
    border: 1px solid rgba(40,156,255,0.12);
}
.quick-card {
    min-height: 182px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.zone-card {
    overflow: hidden;
}
.zone-card .zone-img {
    height: 210px;
    padding: 12px;
    background: #FFFFFF;
}
.zone-card .zone-img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.zone-body {
    padding: 22px;
}
.feature-list,
.clean-list {
    list-style: none;
    padding: 0;
    margin: 18px 0 0;
    display: grid;
    gap: 12px;
}
.feature-list li,
.clean-list li {
    padding-left: 28px;
    position: relative;
    color: var(--text);
}
.feature-list li::before,
.clean-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .72em;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--brand);
    box-shadow: 0 0 0 5px rgba(40,156,255,0.10);
}
.steps {
    counter-reset: step;
}
.step-card {
    position: relative;
    padding-top: 54px;
}
.step-card::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    position: absolute;
    top: 20px;
    left: 24px;
    color: var(--brand);
    font-size: 20px;
    font-weight: 900;
}
.page-hero {
    margin: 28px auto 12px;
    padding: 46px;
    background: linear-gradient(135deg, rgba(255,255,255,0.96), rgba(238,242,247,0.92));
}
.page-hero .hero-actions,
.hero-card .hero-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 22px;
}
.page-hero p {
    max-width: 850px;
}
.notice-card {
    background: #EEF2F7;
}
.faq-card h3 {
    margin-bottom: 8px;
}
.review-card {
    position: relative;
}
.review-card::before {
    content: "“";
    position: absolute;
    right: 22px;
    top: 8px;
    font-size: 58px;
    color: rgba(40,156,255,0.16);
    line-height: 1;
}
.app-section {
    background: #F5F7FB;
    border-radius: 28px;
    padding: 32px;
    border: 1px solid var(--border);
}
.site-footer {
    background: #243447;
    color: #EAF3FF;
    margin-top: 48px;
    padding: 54px 0 24px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 30px;
}
.footer-logo img {
    max-height: 52px;
    width: auto;
    margin-bottom: 16px;
}
.footer-brand p,
.footer-reminder p {
    color: #EAF3FF;
    opacity: .86;
}
.footer-col {
    display: grid;
    align-content: start;
    gap: 8px;
}
.footer-col h3 {
    color: #FFFFFF;
    margin-bottom: 8px;
}
.footer-col a {
    color: #EAF3FF;
    opacity: .84;
}
.footer-col a:hover {
    color: #FFFFFF;
    opacity: 1;
}
.footer-reminder {
    margin-top: 30px;
    border-top: 1px solid rgba(234,243,255,0.18);
    padding-top: 22px;
    display: flex;
    justify-content: space-between;
    gap: 22px;
}
@media (max-width: 1100px) {
    .nav { gap: 13px; }
    .nav-link, .nav a { font-size: 14px; }
    .grid-5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
    body { padding-top: 72px; }
    .container { width: min(100% - 28px, 1200px); }
    .header-inner {
        min-height: 68px;
        gap: 10px;
    }
    .menu-toggle { display: block; }
    .nav-wrap { display: none; }
    .logo {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
    }
    .logo img { max-height: 46px; }
    .header-action { margin-left: auto; }
    .header-btn { min-height: 38px; padding: 0 16px; }
    .banner-slider {
        margin: 18px auto 24px;
        border-radius: 16px;
        min-height: 260px;
    }
    .slides { height: 360px; }
    .slide-copy {
        left: 14px;
        right: 14px;
        bottom: 44px;
        width: auto;
        padding: 16px;
    }
    .slider-arrow {
        width: 36px;
        height: 36px;
        font-size: 20px;
    }
    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }
    .section { padding: 32px 0; }
    .grid-2,
    .grid-3,
    .grid-4,
    .grid-5,
    .split,
    .split.reverse {
        grid-template-columns: 1fr;
    }
    .page-hero,
    .hero-card,
    .app-section {
        padding: 24px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .footer-reminder {
        flex-direction: column;
    }
}
@media (max-width: 540px) {
    body { padding-top: 66px; }
    .container { width: calc(100% - 24px); }
    .header-inner { min-height: 64px; }
    .logo img { max-height: 40px; }
    .menu-toggle { width: 38px; height: 38px; padding: 8px; }
    .main-btn { min-height: 38px; padding: 0 14px; }
    .slides { height: 330px; }
    .slide-copy h1,
    .slide-copy h2 { font-size: 22px; }
    .slide-copy p { font-size: 14px; }
    .card,
    .info-card,
    .review-card,
    .faq-card,
    .notice-card,
    .step-card { padding: 20px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-reminder { gap: 8px; }
}