* {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    margin: 0;
    background: #E6EBF2;
    color: #243447;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.72;
}
a {
    color: #289CFF;
    text-decoration: none;
}
a:hover {
    color: #1E90F0;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
.container {
    width: min(1200px, calc(100% - 32px));
    margin: 0 auto;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 9999;
    background: #F5F7FB;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(56,92,138,0.10);
}
.desktop-header {
    min-height: 76px;
    display: flex;
    align-items: center;
    gap: 18px;
}
.brand-logo img,
.mobile-logo img,
.drawer-logo img {
    width: auto;
    object-fit: contain;
}
.brand-logo img {
    max-width: 146px;
    max-height: 46px;
}
.nav {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex-wrap: wrap;
}
.nav a {
    position: relative;
    color: #4E5F7A;
    font-weight: 700;
    font-size: 14px;
    padding: 20px 8px 18px;
    white-space: nowrap;
}
.nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    right: 50%;
    bottom: 10px;
    height: 3px;
    border-radius: 999px;
    background: #289CFF;
    transition: .22s ease;
}
.nav a.active,
.nav a:hover {
    color: #289CFF;
}
.nav a.active::after,
.nav a:hover::after {
    left: 14px;
    right: 14px;
}
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 24px;
    background: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%);
    color: #FFFFFF !important;
    border-radius: 999px;
    box-shadow: 0 10px 24px rgba(36,155,255,0.25);
    font-weight: 800;
    border: 0;
    cursor: pointer;
    transition: .22s ease;
    white-space: nowrap;
}
.main-btn:hover {
    background: linear-gradient(180deg, #48D9F7 0%, #1E90F0 100%);
    transform: translateY(-1px);
}
.header-btn {
    flex: 0 0 auto;
}
.mobile-header {
    display: none;
    height: 66px;
    align-items: center;
    justify-content: space-between;
    padding: 0 14px;
}
.mobile-logo {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}
.mobile-logo img {
    max-width: 132px;
    max-height: 40px;
}
.menu-toggle,
.drawer-close {
    border: 0;
    background: transparent;
    cursor: pointer;
}
.menu-toggle {
    width: 42px;
    height: 42px;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 0 8px;
}
.menu-toggle span {
    display: block;
    height: 3px;
    width: 24px;
    background: #4E5F7A;
    border-radius: 999px;
}
.mobile-register {
    min-height: 38px;
    padding: 0 18px;
}
.drawer-mask {
    position: fixed;
    inset: 0;
    background: rgba(15,31,52,.46);
    opacity: 0;
    pointer-events: none;
    transition: .25s ease;
    z-index: 10000;
}
.mobile-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: min(84vw, 320px);
    height: 100vh;
    background: #FFFFFF;
    transform: translateX(-102%);
    transition: .28s ease;
    z-index: 10001;
    box-shadow: 18px 0 40px rgba(18,40,70,.18);
    overflow-y: auto;
}
.drawer-open {
    overflow: hidden;
}
.drawer-open .drawer-mask {
    opacity: 1;
    pointer-events: auto;
}
.drawer-open .mobile-drawer {
    transform: translateX(0);
}
.drawer-head {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px;
    background: #F5F7FB;
    border-bottom: 1px solid rgba(40,156,255,.14);
}
.drawer-logo img {
    max-width: 142px;
    max-height: 44px;
}
.drawer-close {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    color: #4E5F7A;
    font-size: 30px;
    line-height: 1;
}
.drawer-nav {
    display: grid;
    padding: 14px;
    gap: 6px;
}
.drawer-nav a {
    color: #4E5F7A;
    font-weight: 800;
    padding: 12px 14px;
    border-radius: 14px;
    background: #F5F7FB;
}
.drawer-nav a.active,
.drawer-nav a:hover {
    color: #289CFF;
    background: #EEF2F7;
}
.page-main {
    min-height: 70vh;
    padding-bottom: 60px;
}
.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;
    aspect-ratio: 1200 / 430;
}
.slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity .42s ease;
}
.slide.active {
    opacity: 1;
    pointer-events: auto;
}
.banner-slider img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #FFFFFF;
}
.banner-caption,
.banner-text,
.slide-title,
.slide-desc,
.slide-content,
.slide-card,
.banner-card {
    display: none !important;
}
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid rgba(40,156,255,.18);
    background: rgba(255,255,255,.82);
    color: #289CFF;
    font-size: 30px;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 10px 24px rgba(56,92,138,.14);
}
.slider-prev { left: 18px; }
.slider-next { right: 18px; }
.slider-dots {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.slider-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 0;
    background: rgba(78,95,122,.34);
    cursor: pointer;
}
.slider-dot.active {
    width: 28px;
    border-radius: 999px;
    background: #289CFF;
}
.hero-panel,
.section,
.page-hero,
.notice-strip {
    width: min(1200px, calc(100% - 32px));
    margin: 0 auto 28px;
}
.hero-panel,
.page-hero,
.notice-strip,
.card,
.zone-card,
.info-card,
.review-card,
.faq-item,
.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: 22px;
}
.hero-panel,
.page-hero {
    padding: 34px;
}
.hero-grid,
.split-grid,
.app-grid,
.support-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(280px, .92fr);
    gap: 28px;
    align-items: center;
}
h1,
h2,
h3,
.section-title {
    color: #289CFF;
    line-height: 1.28;
    margin: 0 0 14px;
}
h1 {
    font-size: clamp(30px, 4.6vw, 52px);
}
h2,
.section-title {
    font-size: clamp(24px, 3vw, 34px);
}
h3 {
    font-size: 20px;
}
p {
    margin: 0 0 14px;
}
.lead {
    color: #243447;
    font-size: 18px;
}
.muted,
.card p,
.zone-card p,
.info-card p,
.review-card p,
.faq-item p,
.step-card p {
    color: #66788A;
}
.tiny {
    color: #8A9AAF;
    font-size: 14px;
}
.kicker,
.tag,
.number {
    color: #289CFF;
    font-weight: 900;
}
.actions {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
    margin-top: 20px;
}
.text-link {
    color: #289CFF;
    font-weight: 800;
}
.content-img,
.zone-card img,
.app-section img,
.hero-image img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 18px;
    background: #FFFFFF;
}
.hero-image,
.image-box {
    background: #EEF2F7;
    border-radius: 20px;
    padding: 14px;
    border: 1px solid rgba(40,156,255,.14);
}
.section {
    padding: 28px 0 0;
}
.section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 18px;
}
.section-head p {
    max-width: 680px;
}
.grid-2,
.grid-3,
.grid-4,
.grid-auto {
    display: grid;
    gap: 18px;
}
.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-auto { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.card,
.zone-card,
.info-card,
.review-card,
.faq-item,
.step-card {
    padding: 22px;
}
.zone-card img {
    margin-bottom: 16px;
}
.icon-number {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: #EEF2F7;
    color: #289CFF;
    font-weight: 900;
    margin-bottom: 14px;
}
.notice-strip {
    padding: 24px;
    background: #DDE4EE;
}
.check-list,
.clean-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 10px;
}
.check-list li,
.clean-list li {
    position: relative;
    padding-left: 26px;
    color: #66788A;
}
.check-list li::before,
.clean-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .72em;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #289CFF;
    box-shadow: 0 0 0 5px rgba(40,156,255,.12);
}
.faq-list {
    display: grid;
    gap: 14px;
}
.faq-item h3 {
    margin-bottom: 8px;
}
.review-card strong {
    display: block;
    color: #243447;
    margin-bottom: 8px;
}
.site-footer {
    background: #243447;
    color: #EAF3FF;
    padding: 48px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr .7fr .7fr 1fr;
    gap: 28px;
}
.footer-brand img {
    max-width: 152px;
    max-height: 48px;
    margin-bottom: 16px;
    object-fit: contain;
}
.footer-brand p,
.footer-note p,
.footer-bottom p {
    color: #EAF3FF;
    opacity: .88;
}
.footer-links {
    display: grid;
    gap: 8px;
    align-content: start;
}
.footer-links h3,
.footer-note h3 {
    color: #EAF3FF;
    margin-bottom: 8px;
}
.footer-links a {
    color: #EAF3FF;
    opacity: .86;
}
.footer-links a:hover {
    opacity: 1;
    color: #FFFFFF;
}
.footer-bottom {
    margin-top: 36px;
    border-top: 1px solid rgba(234,243,255,.12);
    text-align: center;
    padding: 18px 16px;
}
@media (max-width: 1080px) {
    .desktop-header { display: none; }
    .mobile-header { display: flex; }
    .page-main { padding-top: 0; }
    .banner-slider { margin-top: 18px; border-radius: 16px; width: calc(100% - 24px); aspect-ratio: 16 / 7; }
    .hero-grid,
    .split-grid,
    .app-grid,
    .support-grid { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 720px) {
    .container,
    .hero-panel,
    .section,
    .page-hero,
    .notice-strip { width: calc(100% - 24px); }
    .hero-panel,
    .page-hero,
    .card,
    .zone-card,
    .info-card,
    .review-card,
    .faq-item,
    .step-card { padding: 18px; border-radius: 18px; }
    .grid-2,
    .grid-3,
    .grid-4 { grid-template-columns: 1fr; }
    .section-head { display: block; }
    .slider-arrow { width: 36px; height: 36px; font-size: 26px; }
    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }
    .banner-slider { aspect-ratio: 16 / 8; }
    .footer-grid { grid-template-columns: 1fr; }
    .lead { font-size: 16px; }
}