:root {
    --page-bg: #E6EBF2;
    --nav-bg: #F5F7FB;
    --card-bg: rgba(255,255,255,0.92);
    --soft-bg: #EEF2F7;
    --soft-bg-2: #DDE4EE;
    --title: #289CFF;
    --nav-text: #4E5F7A;
    --text: #243447;
    --sub: #66788A;
    --hint: #8A9AAF;
    --footer: #243447;
    --footer-text: #EAF3FF;
    --border: rgba(40,156,255,0.16);
    --shadow: 0 14px 36px rgba(56,92,138,0.12);
    --btn: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%);
    --btn-hover: linear-gradient(180deg, #48D9F7 0%, #1E90F0 100%);
}
* { 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", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: var(--title); text-decoration: none; }
a:hover { color: #1E90F0; }
img { max-width: 100%; display: block; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 9999;
    background: #F5F7FB;
    box-shadow: 0 8px 24px rgba(56,92,138,0.10);
    backdrop-filter: blur(10px);
}
.header-inner {
    max-width: 1320px;
    margin: 0 auto;
    min-height: 74px;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 24px;
}
.brand-logo img { width: 142px; height: auto; }
.desktop-nav {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    white-space: nowrap;
}
.desktop-nav a,
.drawer-nav a {
    color: #4E5F7A;
    font-weight: 700;
    font-size: 15px;
    position: relative;
}
.desktop-nav a.active,
.drawer-nav a.active {
    color: #289CFF;
}
.desktop-nav a.active::after {
    content: "";
    position: absolute;
    left: 16%;
    right: 16%;
    bottom: -10px;
    height: 3px;
    border-radius: 99px;
    background: #289CFF;
}
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    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;
    padding: 10px 24px;
    min-width: 86px;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.main-btn:hover {
    background: linear-gradient(180deg, #48D9F7 0%, #1E90F0 100%);
    transform: translateY(-1px);
    box-shadow: 0 14px 28px rgba(36,155,255,0.32);
}
.mobile-header {
    display: none;
    min-height: 66px;
    padding: 0 16px;
    align-items: center;
    justify-content: space-between;
}
.menu-toggle,
.drawer-close,
.slider-arrow,
.slider-dot {
    border: 0;
    cursor: pointer;
    font: inherit;
}
.menu-toggle {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: #FFFFFF;
    box-shadow: 0 8px 22px rgba(56,92,138,0.10);
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}
.menu-toggle span {
    width: 21px;
    height: 2px;
    border-radius: 999px;
    background: #4E5F7A;
}
.mobile-logo img { width: 128px; height: auto; }
.mobile-reg { padding: 8px 16px; min-width: 72px; }
.drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.38);
    opacity: 0;
    visibility: hidden;
    z-index: 10000;
    transition: opacity .25s ease, visibility .25s ease;
}
.mobile-drawer {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 84vw;
    max-width: 320px;
    background: #FFFFFF;
    z-index: 10001;
    transform: translateX(-105%);
    transition: transform .28s ease;
    box-shadow: 18px 0 42px rgba(36,52,71,0.22);
    padding: 18px;
    overflow-y: auto;
}
.drawer-open { overflow: hidden; }
.drawer-open .drawer-overlay { opacity: 1; visibility: visible; }
.drawer-open .mobile-drawer { transform: translateX(0); }
.drawer-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(40,156,255,0.16);
}
.drawer-logo img { width: 132px; }
.drawer-close {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: #EEF2F7;
    color: #4E5F7A;
    font-size: 26px;
    line-height: 1;
}
.drawer-nav {
    display: grid;
    gap: 8px;
}
.drawer-nav a {
    display: block;
    padding: 12px 14px;
    border-radius: 14px;
    background: #F5F7FB;
}
.drawer-nav a.active {
    background: rgba(40,156,255,0.11);
}
.site-main {
    min-height: 60vh;
}
.container {
    width: min(1200px, calc(100% - 40px));
    margin: 0 auto;
}
.section {
    padding: 54px 0;
}
.section.tight { padding: 34px 0; }
.section-head {
    max-width: 780px;
    margin-bottom: 26px;
}
.eyebrow {
    color: #289CFF;
    font-weight: 800;
    letter-spacing: .08em;
    font-size: 13px;
}
h1, h2, h3, .section-title {
    color: #289CFF;
    line-height: 1.25;
    margin: 0 0 16px;
}
h1 { font-size: clamp(30px, 4.2vw, 52px); }
h2 { font-size: clamp(24px, 3.1vw, 36px); }
h3 { font-size: 20px; }
p { margin: 0 0 14px; }
.lead {
    color: #243447;
    font-size: 18px;
}
.muted { color: #66788A; }
.small { color: #8A9AAF; font-size: 14px; }
.card,
.zone-card,
.info-card,
.review-card,
.faq-item,
.notice-band,
.page-hero,
.hero-panel {
    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;
}
.card-tag,
.step-no,
.feature-no {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #289CFF;
    background: rgba(40,156,255,0.10);
    border-radius: 999px;
    padding: 4px 12px;
    font-weight: 800;
    font-size: 13px;
    margin-bottom: 12px;
}
.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-auto { grid-template-columns: repeat(auto-fit, minmax(235px,1fr)); }
.link-more {
    display: inline-flex;
    align-items: center;
    color: #289CFF;
    font-weight: 800;
    margin-top: 10px;
}
.link-more::after {
    content: "›";
    margin-left: 6px;
}
.banner-slider {
    width: min(1200px, calc(100% - 40px));
    height: clamp(220px, 38vw, 520px);
    margin: 28px auto 36px;
    border-radius: 20px;
    background: #FFFFFF;
    box-shadow: 0 18px 40px rgba(56,92,138,0.12);
    overflow: hidden;
    position: relative;
}
.banner-track,
.banner-slide {
    width: 100%;
    height: 100%;
}
.banner-slide {
    display: none;
}
.banner-slide.active {
    display: block;
}
.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: 44px;
    height: 44px;
    border-radius: 999px;
    background: rgba(255,255,255,0.84);
    color: #289CFF;
    font-size: 28px;
    box-shadow: 0 10px 24px rgba(56,92,138,0.14);
    z-index: 2;
}
.slider-prev { left: 18px; }
.slider-next { right: 18px; }
.slider-dots {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 16px;
    display: flex;
    justify-content: center;
    gap: 9px;
    z-index: 2;
}
.slider-dot {
    width: 10px;
    height: 10px;
    padding: 0;
    border-radius: 999px;
    background: rgba(40,156,255,0.28);
}
.slider-dot.active {
    width: 26px;
    background: #289CFF;
}
.hero-panel,
.page-hero {
    padding: 34px;
}
.hero-panel {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 32px;
    align-items: center;
}
.hero-actions {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
    margin-top: 22px;
}
.image-frame {
    background: #FFFFFF;
    border-radius: 22px;
    padding: 14px;
    border: 1px solid rgba(40,156,255,0.14);
    box-shadow: 0 14px 30px rgba(56,92,138,0.10);
}
.content-img,
.zone-card img,
.app-section img,
.banner-slider img {
    max-width: 100%;
    height: auto;
}
.image-frame img,
.card-image img {
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 18px;
    background: #FFFFFF;
}
.split {
    display: grid;
    grid-template-columns: .95fr 1.05fr;
    gap: 26px;
    align-items: center;
}
.soft-panel {
    background: #EEF2F7;
    border-radius: 22px;
    padding: 28px;
    border: 1px solid rgba(40,156,255,0.14);
}
.steps {
    counter-reset: item;
}
.step-card {
    position: relative;
}
.review-card {
    color: #243447;
}
.review-card strong {
    display: block;
    color: #289CFF;
    margin-bottom: 8px;
}
.notice-band {
    padding: 26px;
    background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(238,242,247,0.94));
}
.faq-list {
    display: grid;
    gap: 16px;
}
.faq-item h3 {
    font-size: 18px;
}
.page-hero {
    margin-top: 34px;
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 30px;
    align-items: center;
}
.page-hero.no-image {
    display: block;
}
.page-intro-list {
    display: grid;
    gap: 12px;
    margin-top: 18px;
}
.page-intro-list span {
    display: inline-flex;
    width: fit-content;
    color: #289CFF;
    background: rgba(40,156,255,0.10);
    border-radius: 999px;
    padding: 5px 12px;
    font-weight: 800;
}
.pill-list {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 18px;
}
.pill-list span {
    color: #289CFF;
    border: 1px solid rgba(40,156,255,0.24);
    background: #FFFFFF;
    border-radius: 999px;
    padding: 6px 13px;
    font-weight: 800;
    font-size: 14px;
}
.timeline {
    display: grid;
    gap: 16px;
}
.timeline .info-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 14px;
    align-items: start;
}
.app-gallery {
    display: grid;
    grid-template-columns: repeat(3,minmax(0,1fr));
    gap: 20px;
}
.app-gallery .image-frame {
    padding: 12px;
}
.contact-box {
    display: grid;
    grid-template-columns: repeat(3,minmax(0,1fr));
    gap: 18px;
}
.site-footer {
    background: #243447;
    color: #EAF3FF;
    margin-top: 50px;
}
.footer-inner {
    width: min(1200px, calc(100% - 40px));
    margin: 0 auto;
    padding: 46px 0 26px;
}
.footer-brand {
    display: grid;
    grid-template-columns: 170px 1fr;
    gap: 24px;
    align-items: center;
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(234,243,255,0.16);
}
.footer-brand img {
    width: 150px;
}
.footer-brand p,
.footer-alert,
.copyright {
    color: rgba(234,243,255,0.86);
}
.footer-columns {
    display: grid;
    grid-template-columns: repeat(3,minmax(0,1fr));
    gap: 22px;
    padding: 26px 0;
}
.footer-columns h3 {
    color: #EAF3FF;
    font-size: 17px;
}
.footer-columns a {
    display: block;
    color: rgba(234,243,255,0.78);
    margin: 7px 0;
}
.footer-columns a:hover { color: #FFFFFF; }
.footer-alert {
    background: rgba(255,255,255,0.08);
    border-radius: 18px;
    padding: 18px;
    border: 1px solid rgba(234,243,255,0.12);
}
.copyright {
    margin: 20px 0 0;
    font-size: 14px;
}
@media (max-width: 1220px) {
    .desktop-nav { gap: 10px; }
    .desktop-nav a { font-size: 14px; }
    .header-inner { padding: 0 16px; gap: 14px; }
    .brand-logo img { width: 126px; }
}
@media (max-width: 1040px) {
    .desktop-header { display: none; }
    .mobile-header { display: flex; }
    .container,
    .banner-slider,
    .footer-inner {
        width: min(100% - 28px, 1200px);
    }
    .hero-panel,
    .page-hero,
    .split {
        grid-template-columns: 1fr;
    }
    .grid-4 { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .grid-3 { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .app-gallery,
    .contact-box {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 640px) {
    body { line-height: 1.68; }
    .section { padding: 40px 0; }
    .section.tight { padding: 26px 0; }
    .banner-slider {
        height: clamp(180px, 58vw, 280px);
        margin-top: 18px;
        border-radius: 16px;
    }
    .slider-arrow {
        width: 38px;
        height: 38px;
        font-size: 23px;
    }
    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }
    .hero-panel,
    .page-hero {
        padding: 22px;
    }
    .card,
    .zone-card,
    .info-card,
    .review-card,
    .faq-item,
    .notice-band,
    .soft-panel {
        padding: 20px;
        border-radius: 18px;
    }
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    .footer-brand {
        grid-template-columns: 1fr;
    }
    .footer-columns {
        grid-template-columns: 1fr;
    }
}