:root {
    --page-bg: #E6EBF2;
    --nav-bg: #F5F7FB;
    --white: #FFFFFF;
    --soft: #EEF2F7;
    --soft-deep: #DDE4EE;
    --blue: #289CFF;
    --nav-text: #4E5F7A;
    --text: #243447;
    --muted: #66788A;
    --light-text: #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", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    line-height: 1.7;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: 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);
}
.header-inner {
    width: min(1280px, calc(100% - 32px));
    margin: 0 auto;
    height: 78px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 26px;
}
.logo-link img { width: 142px; display: block; }
.nav { display: flex; align-items: center; justify-content: center; gap: 18px; }
.nav a {
    position: relative;
    color: #4E5F7A;
    font-size: 15px;
    font-weight: 700;
    padding: 28px 0 24px;
    white-space: nowrap;
}
.nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 17px;
    width: 0;
    height: 3px;
    border-radius: 999px;
    background: #289CFF;
    transform: translateX(-50%);
    transition: width .22s ease;
}
.nav a:hover, .nav a.active { color: #289CFF; }
.nav a:hover::after, .nav a.active::after { width: 28px; }
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--btn);
    color: #FFFFFF;
    box-shadow: 0 10px 24px rgba(36,155,255,0.25);
    font-weight: 800;
    letter-spacing: .04em;
    border: 0;
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.main-btn:hover {
    background: var(--btn-hover);
    transform: translateY(-1px);
    box-shadow: 0 14px 28px rgba(36,155,255,0.30);
}
.header-btn { min-width: 90px; }
.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 0;
    background: transparent;
    padding: 0;
}
.menu-toggle span {
    display: block;
    width: 24px;
    height: 3px;
    margin: 5px auto;
    border-radius: 99px;
    background: #4E5F7A;
}
.drawer-mask {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(0,0,0,.42);
    opacity: 0;
    pointer-events: none;
    transition: opacity .24s ease;
}
.drawer-mask.show { opacity: 1; pointer-events: auto; }
.mobile-drawer {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10001;
    width: 84vw;
    max-width: 320px;
    height: 100vh;
    background: #FFFFFF;
    transform: translateX(-102%);
    transition: transform .28s ease;
    box-shadow: 14px 0 32px rgba(36,52,71,.18);
    overflow-y: auto;
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-open { overflow: hidden; }
.drawer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
    background: #F5F7FB;
}
.drawer-head img { width: 132px; display: block; }
.drawer-close {
    width: 38px;
    height: 38px;
    border: 0;
    border-radius: 50%;
    background: #EEF2F7;
    color: #4E5F7A;
    font-size: 28px;
    line-height: 1;
}
.drawer-nav { display: grid; gap: 4px; padding: 16px; }
.drawer-nav a {
    padding: 13px 14px;
    border-radius: 14px;
    color: #4E5F7A;
    font-weight: 700;
}
.drawer-nav a.active, .drawer-nav a:hover { color: #289CFF; background: #EEF2F7; }
.site-main { min-height: 60vh; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: 44px 0; }
.section.compact { padding: 28px 0; }
.section-head {
    max-width: 760px;
    margin: 0 auto 24px;
    text-align: center;
}
h1, h2, h3, .section-title { color: #289CFF; line-height: 1.28; margin: 0 0 14px; }
h1 { font-size: clamp(32px, 5vw, 54px); }
h2, .section-title { font-size: clamp(25px, 3.5vw, 38px); }
h3 { font-size: 20px; }
p { margin: 0 0 14px; color: #243447; }
.lead { color: #66788A; font-size: 18px; }
.muted { color: #66788A; }
.note { color: #8A9AAF; font-size: 14px; }
.text-link {
    color: #289CFF;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.text-link::after { content: "→"; }
.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;
    height: clamp(220px, 36vw, 470px);
}
.banner-track { width: 100%; height: 100%; position: relative; }
.banner-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity .55s ease;
}
.banner-slide.active { opacity: 1; z-index: 1; }
.banner-slider img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #FFFFFF;
    display: block;
}
.banner-caption,
.banner-text,
.slide-title,
.slide-desc,
.slide-content,
.slide-card,
.banner-card { display: none !important; }
.slider-arrow {
    position: absolute;
    top: 50%;
    z-index: 3;
    transform: translateY(-50%);
    width: 46px;
    height: 46px;
    border: 0;
    border-radius: 50%;
    background: rgba(255,255,255,.88);
    color: #289CFF;
    font-size: 28px;
    box-shadow: 0 8px 20px rgba(56,92,138,0.18);
    cursor: pointer;
}
.slider-arrow.prev { left: 18px; }
.slider-arrow.next { right: 18px; }
.slider-dots {
    position: absolute;
    z-index: 4;
    left: 0;
    right: 0;
    bottom: 16px;
    display: flex;
    justify-content: center;
    gap: 9px;
}
.slider-dot {
    width: 10px;
    height: 10px;
    border: 0;
    border-radius: 50%;
    background: rgba(78,95,122,.35);
    cursor: pointer;
}
.slider-dot.active { width: 26px; border-radius: 999px; background: #289CFF; }
.hero {
    padding: 54px 0 24px;
}
.hero-card {
    background: rgba(255,255,255,0.92);
    border: 1px solid var(--border);
    border-radius: 28px;
    box-shadow: var(--shadow);
    padding: clamp(28px, 5vw, 56px);
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr);
    gap: 34px;
    align-items: center;
}
.hero-card.no-image { grid-template-columns: 1fr; }
.hero-card .tagline,
.tagline {
    display: inline-flex;
    color: #289CFF;
    font-weight: 800;
    background: #EEF2F7;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 5px 13px;
    margin-bottom: 15px;
}
.content-img,
.zone-card img,
.app-section img,
.banner-slider img { max-width: 100%; height: auto; }
.hero-image,
.content-img {
    width: 100%;
    border-radius: 24px;
    box-shadow: 0 18px 36px rgba(56,92,138,0.14);
    background: #FFFFFF;
    object-fit: contain;
    display: block;
}
.grid { display: grid; gap: 20px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.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;
    padding: 24px;
}
.card p,
.zone-card p,
.info-card p,
.review-card p,
.faq-item p,
.step-card p { color: #66788A; }
.card .num,
.step-card .num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: #EEF2F7;
    color: #289CFF;
    font-weight: 900;
    margin-bottom: 12px;
}
.image-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}
.image-grid img {
    width: 100%;
    border-radius: 22px;
    box-shadow: 0 14px 36px rgba(56,92,138,0.10);
    background: #FFFFFF;
    object-fit: contain;
}
.split {
    display: grid;
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: 28px;
    align-items: center;
}
.soft-panel {
    background: #EEF2F7;
    border-radius: 26px;
    padding: 30px;
    border: 1px solid var(--border);
}
.list {
    display: grid;
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}
.list li {
    padding: 14px 16px;
    background: rgba(255,255,255,.72);
    border-radius: 16px;
    color: #243447;
    border: 1px solid rgba(40,156,255,0.12);
}
.review-card strong { color: #289CFF; display: block; margin-bottom: 8px; }
.faq-item h3 { color: #289CFF; font-size: 18px; }
.notice-band {
    background: #DDE4EE;
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 26px;
    color: #243447;
}
.notice-band strong { color: #289CFF; }
.site-footer {
    margin-top: 42px;
    background: #243447;
    color: #EAF3FF;
}
.footer-wrap {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 46px 0 30px;
    display: grid;
    grid-template-columns: 1.2fr .6fr .6fr 1fr;
    gap: 30px;
}
.footer-brand img { width: 142px; margin-bottom: 14px; display: block; }
.site-footer p,
.site-footer a { color: #EAF3FF; opacity: .9; }
.site-footer h3 { color: #EAF3FF; font-size: 18px; }
.footer-links { display: grid; gap: 8px; align-content: start; }
.footer-links a:hover { color: #32D1F6; opacity: 1; }
.footer-bottom {
    text-align: center;
    padding: 18px 16px;
    border-top: 1px solid rgba(234,243,255,.14);
    color: #EAF3FF;
    opacity: .85;
}
@media (max-width: 1180px) {
    .nav { gap: 12px; }
    .nav a { font-size: 14px; }
    .header-inner { gap: 16px; }
}
@media (max-width: 980px) {
    .header-inner {
        width: min(100%, calc(100% - 24px));
        height: 66px;
        grid-template-columns: 58px 1fr auto;
        gap: 8px;
    }
    .menu-toggle { display: block; }
    .nav { display: none; }
    .logo-link { justify-self: center; }
    .logo-link img { width: 128px; }
    .header-btn { min-width: 76px; min-height: 38px; padding: 0 16px; }
    .hero { padding-top: 28px; }
    .hero-card, .split { grid-template-columns: 1fr; }
    .grid.four, .grid.three { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-wrap { grid-template-columns: 1fr 1fr; }
    .image-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
    .container { width: min(100%, calc(100% - 24px)); }
    .section { padding: 32px 0; }
    .banner-slider { margin: 18px 12px 26px; border-radius: 16px; height: clamp(190px, 58vw, 310px); }
    .slider-arrow { width: 38px; height: 38px; font-size: 24px; }
    .slider-arrow.prev { left: 10px; }
    .slider-arrow.next { right: 10px; }
    .grid.two, .grid.three, .grid.four { grid-template-columns: 1fr; }
    .hero-card { padding: 24px; border-radius: 22px; }
    .card, .zone-card, .info-card, .review-card, .faq-item, .step-card { padding: 20px; }
    .footer-wrap { grid-template-columns: 1fr; gap: 18px; }
}