* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    background: #E6EBF2;
    color: #243447;
    line-height: 1.75;
    padding-top: 78px;
    overflow-x: hidden;
}

body.drawer-open {
    overflow: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: min(1200px, calc(100% - 36px));
    margin: 0 auto;
}

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 20000;
    background: #F5F7FB;
    border-bottom: 1px solid rgba(40,156,255,0.14);
    box-shadow: 0 10px 28px rgba(56,92,138,0.08);
}

.desktop-header {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
}

.logo img {
    max-height: 52px;
    width: auto;
}

.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 {
    position: relative;
    border: 0;
    background: transparent;
    cursor: pointer;
    font: inherit;
    color: #4E5F7A;
    padding: 23px 0 22px;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.nav-link:hover,
.nav-link.active,
.dropdown-menu a.active,
.more-menu a.active {
    color: #289CFF;
}

.nav-link.active::after,
.nav-link:hover::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 14px;
    height: 3px;
    border-radius: 999px;
    background: #289CFF;
}

.dropdown,
.more-dropdown {
    position: relative;
}

.dropdown-toggle::after {
    content: "⌄";
    font-size: 12px;
    color: #8A9AAF;
    transform: translateY(-1px);
}

.dropdown-menu,
.more-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    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;
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: .18s ease;
}

.more-menu {
    left: auto;
    right: 0;
}

.dropdown:hover .dropdown-menu,
.more-dropdown:hover .more-menu,
.dropdown.open .dropdown-menu,
.more-dropdown.open .more-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a,
.more-menu a {
    display: block;
    padding: 11px 14px;
    color: #4E5F7A;
    white-space: nowrap;
    border-radius: 10px;
}

.dropdown-menu a:hover,
.more-menu a:hover {
    color: #289CFF;
    background: rgba(40,156,255,0.08);
}

.header-action {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
}

.main-btn,
.text-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 22px;
    border-radius: 999px;
    font-weight: 700;
    letter-spacing: .02em;
}

.main-btn {
    background: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%);
    color: #FFFFFF;
    box-shadow: 0 12px 26px rgba(36,155,255,0.28);
}

.main-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 16px 30px rgba(36,155,255,0.34);
}

.text-btn {
    color: #289CFF;
    background: rgba(40,156,255,0.08);
}

.mobile-header {
    display: none;
    min-height: 68px;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
}

.menu-toggle {
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: 14px;
    background: #FFFFFF;
    box-shadow: 0 8px 18px rgba(56,92,138,0.10);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}

.menu-toggle span {
    width: 20px;
    height: 2px;
    background: #4E5F7A;
    border-radius: 999px;
}

.mobile-logo img {
    max-height: 44px;
    width: auto;
}

.mobile-reg {
    min-height: 38px;
    padding: 0 16px;
}

.drawer-mask {
    position: fixed;
    inset: 0;
    background: rgba(36,52,71,0.36);
    z-index: 20001;
    opacity: 0;
    visibility: hidden;
    transition: .24s ease;
}

.drawer-mask.show {
    opacity: 1;
    visibility: visible;
}

.mobile-drawer {
    position: fixed;
    z-index: 20002;
    left: 0;
    top: 0;
    bottom: 0;
    width: 84%;
    max-width: 320px;
    background: #FFFFFF;
    transform: translateX(-105%);
    transition: transform .28s ease;
    box-shadow: 24px 0 40px rgba(36,52,71,0.20);
    display: flex;
    flex-direction: column;
}

.mobile-drawer.open {
    transform: translateX(0);
}

.drawer-head {
    min-height: 74px;
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(40,156,255,0.12);
    background: #F5F7FB;
}

.drawer-logo img {
    max-height: 46px;
    width: auto;
}

.drawer-close {
    border: 0;
    background: #FFFFFF;
    color: #4E5F7A;
    border-radius: 12px;
    width: 38px;
    height: 38px;
    font-size: 26px;
    line-height: 1;
}

.drawer-nav {
    padding: 14px;
    overflow-y: auto;
    display: grid;
    gap: 7px;
}

.drawer-nav a {
    padding: 11px 14px;
    border-radius: 12px;
    color: #4E5F7A;
    background: #F5F7FB;
}

.drawer-nav a.active,
.drawer-nav a:hover {
    color: #289CFF;
    background: rgba(40,156,255,0.10);
}

.drawer-note {
    margin-top: auto;
    padding: 16px;
    color: #66788A;
    font-size: 13px;
    background: #F5F7FB;
}

main {
    display: block;
}

.section,
.inner-section {
    padding: 42px 0;
}

.section-sm {
    padding: 28px 0;
}

.section-head {
    max-width: 760px;
    margin-bottom: 24px;
}

.section-kicker,
.tag,
.step-num,
.card-index {
    color: #289CFF;
    font-weight: 800;
}

.section-title,
h1,
h2,
h3 {
    color: #289CFF;
    line-height: 1.25;
    margin: 0 0 14px;
}

h1 {
    font-size: clamp(32px, 5vw, 52px);
}

h2,
.section-title {
    font-size: clamp(26px, 3.2vw, 38px);
}

h3 {
    font-size: 21px;
}

p {
    margin: 0 0 14px;
}

.muted {
    color: #66788A;
}

.note {
    color: #8A9AAF;
    font-size: 14px;
}

.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;
    z-index: 1;
}

.slider-track {
    position: relative;
    height: clamp(260px, 46vw, 520px);
}

.slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity .5s ease;
    background: #FFFFFF;
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

.banner-slider img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #FFFFFF;
}

.slide-caption {
    position: absolute;
    left: clamp(18px, 4vw, 48px);
    bottom: clamp(20px, 5vw, 56px);
    max-width: 480px;
    padding: 18px 22px;
    border-radius: 20px;
    background: rgba(255,255,255,0.88);
    border: 1px solid rgba(40,156,255,0.16);
    box-shadow: 0 14px 30px rgba(56,92,138,0.12);
}

.slide-caption strong {
    display: block;
    color: #289CFF;
    font-size: clamp(22px, 3vw, 34px);
    line-height: 1.25;
    margin-bottom: 8px;
}

.slide-caption span {
    color: #243447;
}

.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 50%;
    color: #289CFF;
    background: rgba(255,255,255,0.88);
    box-shadow: 0 10px 24px rgba(56,92,138,0.16);
    font-size: 26px;
    cursor: pointer;
    z-index: 3;
}

.slider-prev {
    left: 16px;
}

.slider-next {
    right: 16px;
}

.slider-dots {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 16px;
    display: flex;
    justify-content: center;
    gap: 9px;
    z-index: 4;
}

.slider-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 0;
    background: rgba(78,95,122,0.32);
    cursor: pointer;
}

.slider-dot.active {
    width: 28px;
    border-radius: 999px;
    background: #289CFF;
}

.card,
.zone-card,
.info-card,
.review-card,
.faq-item,
.notice-panel,
.hero-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: 22px;
}

.card,
.zone-card,
.info-card,
.review-card,
.faq-item {
    padding: 24px;
}

.hero-card {
    padding: clamp(26px, 5vw, 46px);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    align-items: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.grid-5 {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 18px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 22px;
}

.content-img,
.zone-card img,
.app-section img,
.inner-hero img {
    max-width: 100%;
    height: auto;
}

.image-card {
    padding: 14px;
    background: #FFFFFF;
    border-radius: 24px;
    box-shadow: 0 14px 36px rgba(56,92,138,0.10);
    border: 1px solid rgba(40,156,255,0.12);
}

.image-card img,
.zone-card img {
    width: 100%;
    object-fit: contain;
    background: #FFFFFF;
    border-radius: 18px;
}

.image-card img {
    max-height: 360px;
}

.zone-card img {
    max-height: 210px;
    margin-bottom: 16px;
}

.quick-card {
    min-height: 190px;
    display: flex;
    flex-direction: column;
}

.quick-card .text-link {
    margin-top: auto;
}

.text-link {
    color: #289CFF;
    font-weight: 800;
}

.check-list,
.clean-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 12px;
}

.check-list li,
.clean-list li {
    position: relative;
    padding-left: 24px;
    color: #243447;
}

.check-list li::before,
.clean-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .75em;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #289CFF;
    box-shadow: 0 0 0 5px rgba(40,156,255,0.10);
}

.step-grid {
    counter-reset: step;
}

.step-card {
    position: relative;
}

.step-num {
    display: inline-flex;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(40,156,255,0.10);
    margin-bottom: 12px;
}

.review-card {
    color: #243447;
}

.review-card strong {
    color: #289CFF;
    display: block;
    margin-bottom: 8px;
}

.notice-panel {
    padding: 28px;
    background: #EEF2F7;
}

.faq-list {
    display: grid;
    gap: 16px;
}

.faq-item h3 {
    margin-bottom: 8px;
}

.inner-hero {
    padding: 48px 0 34px;
}

.inner-hero .hero-card {
    background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(245,247,251,0.94));
}

.breadcrumb {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    color: #8A9AAF;
    font-size: 14px;
    margin-bottom: 18px;
}

.breadcrumb a {
    color: #66788A;
}

.service-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    margin-top: 24px;
}

.service-strip .info-card {
    padding: 18px;
}

.site-footer {
    margin-top: 44px;
    background: #243447;
    color: #EAF3FF;
}

.footer-grid {
    padding: 44px 0 28px;
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 28px;
}

.footer-logo img {
    max-height: 52px;
    width: auto;
    margin-bottom: 16px;
}

.footer-brand p,
.footer-bottom p {
    color: rgba(234,243,255,0.78);
}

.footer-links {
    display: grid;
    gap: 8px;
    align-content: start;
}

.footer-links h3 {
    color: #EAF3FF;
    font-size: 18px;
}

.footer-links a {
    color: rgba(234,243,255,0.78);
}

.footer-links a:hover {
    color: #FFFFFF;
}

.footer-bottom {
    border-top: 1px solid rgba(234,243,255,0.12);
    padding: 18px 0 26px;
    font-size: 14px;
}

@media (max-width: 1120px) {
    .nav {
        gap: 14px;
        font-size: 14px;
    }
    .optional-desktop {
        display: none;
    }
}

@media (max-width: 900px) {
    body {
        padding-top: 68px;
    }
    .desktop-header {
        display: none;
    }
    .mobile-header {
        display: flex;
    }
    .grid-4,
    .grid-5,
    .service-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .grid-3 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .slide-caption {
        max-width: calc(100% - 36px);
        bottom: 48px;
    }
}

@media (max-width: 680px) {
    .container {
        width: min(100% - 28px, 1200px);
    }
    .section,
    .inner-section {
        padding: 30px 0;
    }
    .grid-2,
    .grid-3,
    .grid-4,
    .grid-5,
    .service-strip,
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .slider-track {
        height: 310px;
    }
    .slide-caption {
        padding: 14px 16px;
    }
    .slider-arrow {
        width: 38px;
        height: 38px;
        font-size: 22px;
    }
    .mobile-reg {
        padding: 0 14px;
    }
    .hero-card,
    .card,
    .zone-card,
    .info-card,
    .review-card,
    .notice-panel,
    .faq-item {
        border-radius: 18px;
    }
}