* {
    box-sizing: border-box;
}

:root {
    --bg: #E6EBF2;
    --bg-soft: #F5F7FB;
    --white: #FFFFFF;
    --line: rgba(40, 156, 255, 0.16);
    --blue: #289CFF;
    --text: #243447;
    --muted: #66788A;
    --footer: #243447;
    --shadow: 0 14px 36px rgba(56, 92, 138, 0.10);
    --shadow-strong: 0 18px 40px rgba(56, 92, 138, 0.12);
    --gradient: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%);
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
}

body.drawer-open {
    overflow: hidden;
}

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

img {
    max-width: 100%;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    background: rgba(245, 247, 251, 0.94);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(56, 92, 138, 0.10);
}

.header-inner {
    width: min(1440px, calc(100% - 40px));
    min-height: 76px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

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

.logo img {
    display: block;
    width: auto;
    max-width: 170px;
    max-height: 52px;
}

.nav-core {
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    white-space: nowrap;
    flex-wrap: nowrap;
}

.nav-core a {
    position: relative;
    padding: 8px 4px;
    color: #4E5F7A;
    font-weight: 650;
    transition: 0.2s ease;
}

.nav-core a:hover,
.nav-core a.active {
    color: var(--blue);
}

.nav-core a.active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -12px;
    width: 28px;
    height: 3px;
    border-radius: 999px;
    background: var(--blue);
    transform: translateX(-50%);
}

.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 24px;
    border: 0;
    border-radius: 999px;
    background: var(--gradient);
    color: #FFFFFF;
    font-weight: 750;
    box-shadow: 0 10px 22px rgba(36, 155, 255, 0.23);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.main-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 28px rgba(36, 155, 255, 0.29);
}

.header-register {
    flex: 0 0 auto;
    min-width: 92px;
}

.mobile-menu-button {
    display: none;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #FFFFFF;
    color: var(--blue);
    font-size: 24px;
    cursor: pointer;
}

.site-shell {
    width: min(1440px, calc(100% - 40px));
    margin: 0 auto;
    padding-top: 104px;
    display: grid;
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
}

.side-channel {
    position: sticky;
    top: 104px;
    max-height: calc(100vh - 126px);
    overflow: auto;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--shadow);
}

.side-channel-title {
    padding: 4px 10px 12px;
    color: var(--text);
    font-size: 14px;
    font-weight: 800;
}

.side-channel nav {
    display: grid;
    gap: 4px;
}

.side-channel a {
    padding: 8px 10px;
    border-radius: 12px;
    color: var(--muted);
    font-size: 14px;
    transition: 0.2s ease;
}

.side-channel a:hover,
.side-channel a.active {
    color: var(--blue);
    background: rgba(40, 156, 255, 0.10);
}

.page-main {
    min-width: 0;
    padding-bottom: 46px;
}

.floating-service {
    position: fixed;
    right: 18px;
    top: 42%;
    z-index: 60;
    width: 68px;
    display: grid;
    gap: 8px;
}

.floating-service a,
.floating-service button {
    min-height: 46px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #FFFFFF;
    color: var(--blue);
    box-shadow: 0 14px 30px rgba(56, 92, 138, 0.12);
    font: inherit;
    font-size: 13px;
    font-weight: 750;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-service .register-link {
    background: var(--gradient);
    color: #FFFFFF;
}

.banner-slider {
    width: 100%;
    height: clamp(300px, 30vw, 400px);
    margin: 0 auto 36px;
    overflow: hidden;
    position: relative;
    z-index: 1;
    border-radius: 22px;
    background: #FFFFFF;
    box-shadow: var(--shadow-strong);
}

.banner-slider .slide {
    display: none;
    width: 100%;
    height: 100%;
}

.banner-slider .slide.active {
    display: block;
}

.banner-slider img {
    display: block;
    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%;
    z-index: 3;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 999px;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.86);
    color: var(--blue);
    box-shadow: 0 8px 20px rgba(56, 92, 138, 0.16);
    font-size: 22px;
    cursor: pointer;
}

.slider-arrow.prev { left: 16px; }
.slider-arrow.next { right: 16px; }

.slider-dots {
    position: absolute;
    left: 50%;
    bottom: 14px;
    z-index: 3;
    display: flex;
    gap: 8px;
    transform: translateX(-50%);
}

.slider-dots button {
    width: 9px;
    height: 9px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: rgba(40, 156, 255, 0.24);
    cursor: pointer;
}

.slider-dots button.active {
    background: var(--blue);
}

.content-section {
    margin: 28px 0;
}

.card,
.zone-card,
.info-card,
.review-card,
.quick-card,
.faq-list details,
.inner-hero {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--shadow);
}

.brand-intro,
.media-split,
.dual-zone,
.split-section {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.brand-intro,
.media-split {
    padding: 30px;
    border-radius: 22px;
    background: rgba(255,255,255,0.90);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    align-items: center;
}

.brand-intro img,
.media-split img,
.inner-hero-image img {
    display: block;
    width: 100%;
    max-height: 300px;
    object-fit: contain;
}

.eyebrow,
.section-heading > span {
    display: inline-block;
    margin-bottom: 6px;
    color: var(--blue);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.08em;
}

h1,
h2,
h3,
.section-title {
    color: var(--blue);
    line-height: 1.35;
}

h1 {
    margin: 0 0 16px;
    font-size: clamp(30px, 4vw, 48px);
}

h2 {
    margin: 0 0 12px;
    font-size: clamp(23px, 2.5vw, 32px);
}

h3 {
    margin: 0 0 10px;
    font-size: 19px;
}

p {
    margin: 0 0 14px;
}

.section-heading {
    max-width: 780px;
    margin-bottom: 20px;
}

.section-heading.compact {
    margin-bottom: 16px;
}

.section-heading p,
.brand-intro p,
.media-split p,
.inner-hero p,
.info-card p,
.zone-card p,
.review-card p,
.prose-card p,
.notice-card p {
    color: var(--muted);
}

.hero-actions,
.inline-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    margin-top: 20px;
}

.text-link {
    color: var(--blue);
    font-weight: 750;
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
}

.quick-card {
    min-height: 122px;
    padding: 18px;
    border-radius: 18px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.quick-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-strong);
}

.quick-card h3 {
    font-size: 17px;
}

.quick-card p {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.6;
}

.quick-card a {
    color: var(--blue);
    font-size: 13px;
    font-weight: 750;
}

.feature-grid,
.service-grid,
.product-grid,
.review-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.info-card,
.zone-card,
.review-card {
    padding: 22px;
    border-radius: 18px;
}

.zone-card img {
    display: block;
    width: 100%;
    height: 170px;
    margin-bottom: 18px;
    object-fit: contain;
}

.product-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.dual-zone > article,
.prose-card,
.notice-card {
    padding: 28px;
    border-radius: 22px;
}

.electronic-feature {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    gap: 26px;
    align-items: center;
    padding: 30px;
    border-radius: 22px;
    background: linear-gradient(145deg, rgba(255,255,255,0.96), rgba(238,242,247,0.96));
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.electronic-feature img {
    display: block;
    width: 100%;
    max-height: 280px;
    object-fit: contain;
}

.review-card {
    margin: 0;
}

.review-card footer {
    margin-top: 14px;
    color: var(--text);
    font-size: 13px;
    font-weight: 800;
}

.faq-list {
    display: grid;
    gap: 12px;
}

.faq-list details {
    padding: 18px 20px;
    border-radius: 16px;
}

.faq-list summary {
    color: var(--text);
    font-weight: 800;
    cursor: pointer;
}

.faq-list details p {
    margin: 12px 0 0;
    color: var(--muted);
}

.compliance-band {
    margin: 28px 0 0;
    padding: 26px 28px;
    border-radius: 22px;
    background: #DDE4EE;
    border: 1px solid rgba(36, 52, 71, 0.08);
}

.compliance-band h2 {
    color: var(--text);
}

.compliance-band p {
    color: #526479;
}

.compliance-band a {
    color: var(--blue);
    font-weight: 800;
}

.inner-hero {
    min-height: 340px;
    padding: 34px;
    border-radius: 24px;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
    gap: 28px;
    align-items: center;
}

.inner-hero-image {
    margin: 0;
}

.step-list,
.check-list {
    margin: 18px 0 0;
    padding-left: 22px;
    color: var(--muted);
}

.step-list li,
.check-list li {
    margin: 8px 0;
}

.site-footer {
    margin-top: 20px;
    padding: 52px max(24px, calc((100% - 1440px) / 2));
    background: var(--footer);
    color: #EAF3FF;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.7fr repeat(3, 1fr);
    gap: 34px;
}

.footer-brand img {
    width: auto;
    max-width: 170px;
    max-height: 50px;
    margin-bottom: 18px;
}

.site-footer h2 {
    margin-bottom: 16px;
    color: #FFFFFF;
    font-size: 17px;
}

.site-footer a {
    display: block;
    margin: 8px 0;
    color: #DDEBFA;
}

.site-footer p {
    color: #BFD0E2;
    font-size: 14px;
}

.footer-note {
    margin-top: 34px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.12);
    display: flex;
    justify-content: space-between;
    gap: 24px;
}

.mobile-drawer {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 10000;
    width: min(84vw, 320px);
    padding: 18px;
    overflow-y: auto;
    background: #FFFFFF;
    transform: translateX(-105%);
    transition: transform 0.24s ease;
    box-shadow: 18px 0 40px rgba(36, 52, 71, 0.18);
}

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

.drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(36, 52, 71, 0.42);
    opacity: 0;
    transition: opacity 0.22s ease;
}

.drawer-overlay.show {
    opacity: 1;
}

.drawer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(40,156,255,0.12);
}

.drawer-logo img {
    width: auto;
    max-width: 140px;
    max-height: 44px;
}

.drawer-close {
    width: 40px;
    height: 40px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--bg-soft);
    color: var(--blue);
    font-size: 26px;
    cursor: pointer;
}

.drawer-nav {
    display: grid;
    gap: 4px;
    padding-top: 14px;
}

.drawer-nav a {
    padding: 11px 12px;
    border-radius: 12px;
    color: var(--muted);
    font-weight: 650;
}

.drawer-nav a.active,
.drawer-nav a:hover {
    color: var(--blue);
    background: rgba(40,156,255,0.09);
}

.mobile-bottom-nav {
    display: none;
}

@media (max-width: 1180px) {
    .site-shell {
        grid-template-columns: 180px minmax(0, 1fr);
        gap: 20px;
    }

    .floating-service {
        right: 8px;
    }

    .quick-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 980px) {
    .nav-core,
    .side-channel,
    .floating-service {
        display: none;
    }

    .mobile-menu-button {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        flex: 0 0 auto;
    }

    .header-inner {
        width: min(100% - 24px, 760px);
        min-height: 68px;
        gap: 12px;
    }

    .header-inner .logo {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
    }

    .logo img {
        max-width: 130px;
        max-height: 42px;
    }

    .header-register {
        min-width: 76px;
        min-height: 40px;
        padding: 8px 17px;
        margin-left: auto;
    }

    .site-shell {
        width: min(100% - 24px, 760px);
        grid-template-columns: 1fr;
        padding-top: 88px;
    }

    .banner-slider {
        height: clamp(230px, 45vw, 320px);
        margin-bottom: 28px;
    }

    .quick-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .feature-grid,
    .service-grid,
    .product-grid,
    .review-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 700px) {
    body {
        padding-bottom: calc(72px + env(safe-area-inset-bottom));
    }

    .site-shell {
        width: min(100% - 20px, 620px);
    }

    .banner-slider {
        height: clamp(170px, 54vw, 230px);
        border-radius: 16px;
    }

    .slider-arrow {
        width: 36px;
        height: 36px;
        font-size: 18px;
    }

    .brand-intro,
    .media-split,
    .dual-zone,
    .split-section,
    .electronic-feature,
    .inner-hero {
        grid-template-columns: 1fr;
    }

    .brand-intro,
    .media-split,
    .electronic-feature,
    .inner-hero {
        padding: 22px;
    }

    .inner-hero-image {
        order: -1;
    }

    .inner-hero-image img,
    .brand-intro img,
    .media-split img,
    .electronic-feature img {
        max-height: 230px;
    }

    .quick-grid,
    .feature-grid,
    .service-grid,
    .product-grid,
    .review-grid {
        grid-template-columns: 1fr;
    }

    .quick-card {
        min-height: auto;
    }

    .site-footer {
        padding: 38px 20px 28px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-note {
        flex-direction: column;
        gap: 4px;
    }

    .mobile-bottom-nav {
        position: fixed;
        inset: auto 0 0 0;
        z-index: 900;
        min-height: 64px;
        padding-bottom: env(safe-area-inset-bottom);
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        border-top: 1px solid rgba(40,156,255,0.14);
        background: rgba(255,255,255,0.96);
        backdrop-filter: blur(10px);
        box-shadow: 0 -8px 24px rgba(56, 92, 138, 0.10);
    }

    .mobile-bottom-nav a {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2px;
        color: var(--muted);
        font-size: 12px;
        font-weight: 700;
    }

    .mobile-bottom-nav span {
        width: 27px;
        height: 27px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 9px;
        background: var(--bg-soft);
        color: var(--blue);
        font-size: 13px;
    }

    .mobile-bottom-nav a.active {
        color: var(--blue);
    }
}