* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: #FFFFFF;
    color: #1F2329;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
    padding-top: 78px;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(201,0,0,0.08);
}
.header-inner {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 24px;
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.header-logo { flex: 0 0 auto; display: inline-flex; align-items: center; }
.header-logo img, .drawer-logo img, .footer-logo img { max-height: 52px; width: auto; }
.nav-core {
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
    flex-wrap: nowrap;
    min-width: 0;
}
.nav-core a {
    color: #1F2329;
    background: #F6F7F9;
    border-radius: 999px;
    padding: 10px 16px;
    font-weight: 700;
    transition: 0.2s ease;
}
.nav-core a:hover, .nav-core a.active {
    color: #C90000;
    background: rgba(201,0,0,0.08);
}
.header-actions { flex: 0 0 auto; display: flex; align-items: center; }
.main-btn, .ghost-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 10px 20px;
    border-radius: 999px;
    font-weight: 800;
    letter-spacing: 0.02em;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.main-btn {
    background: linear-gradient(180deg, #F12B2B 0%, #C90000 55%, #A80000 100%);
    color: #FFFFFF;
    box-shadow: 0 10px 22px rgba(201, 0, 0, 0.22);
}
.main-btn:hover, .ghost-btn:hover { transform: translateY(-2px); }
.ghost-btn {
    color: #C90000;
    background: rgba(201,0,0,0.08);
    border: 1px solid rgba(201,0,0,0.16);
}
.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    padding: 9px;
    border: 0;
    background: #F6F7F9;
    border-radius: 12px;
}
.menu-toggle span {
    display: block;
    height: 2px;
    background: #1F2329;
    margin: 5px 0;
    border-radius: 4px;
}
.layout-shell {
    max-width: 1440px;
    margin: 0 auto;
    padding: 24px 24px 0;
    display: grid;
    grid-template-columns: 190px minmax(0, 1180px);
    gap: 24px;
    align-items: start;
}
.site-main { min-width: 0; width: 100%; }
.side-category {
    position: sticky;
    top: 96px;
    background: #FFFFFF;
    border: 1px solid rgba(201,0,0,0.10);
    border-radius: 18px;
    box-shadow: 0 12px 30px rgba(18,28,45,0.08);
    padding: 14px;
    max-height: calc(100vh - 120px);
    overflow: auto;
}
.side-category strong {
    display: block;
    color: #C90000;
    font-size: 15px;
    padding: 8px 10px 10px;
}
.side-category a {
    display: block;
    color: #1F2329;
    border-radius: 12px;
    padding: 8px 10px;
    font-size: 14px;
    font-weight: 700;
    margin: 2px 0;
}
.side-category a:hover, .side-category a.active {
    color: #C90000;
    background: rgba(201,0,0,0.08);
}
.banner-slider {
    width: 100%;
    margin: 0 auto 34px;
    border-radius: 22px;
    background: #F7F8FA;
    box-shadow: 0 12px 30px rgba(18,28,45,0.08);
    overflow: hidden;
    position: relative;
    height: clamp(260px, 30vw, 360px);
}
.slides, .slide { width: 100%; height: 100%; }
.slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.45s ease;
}
.slide.active { opacity: 1; z-index: 2; }
.banner-slider img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #F7F8FA;
}
.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: 4;
    width: 42px;
    height: 42px;
    transform: translateY(-50%);
    border: 0;
    border-radius: 999px;
    background: rgba(255,255,255,0.92);
    color: #C90000;
    font-size: 30px;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 8px 18px rgba(18,28,45,0.14);
}
.slider-arrow.prev { left: 16px; }
.slider-arrow.next { right: 16px; }
.slider-dots {
    position: absolute;
    z-index: 4;
    left: 0;
    right: 0;
    bottom: 12px;
    display: flex;
    justify-content: center;
    gap: 8px;
}
.slider-dot {
    width: 9px;
    height: 9px;
    border: 0;
    border-radius: 999px;
    background: rgba(31,35,41,0.25);
    cursor: pointer;
}
.slider-dot.active { width: 24px; background: #C90000; }
.section, .inner-hero, .notice-band, .split-panel, .cards-panel { margin-bottom: 34px; }
.inner-hero, .home-intro, .split-panel, .notice-band, .app-panel, .about-panel {
    background: #FFFFFF;
    border: 1px solid rgba(201,0,0,0.10);
    box-shadow: 0 12px 30px rgba(18,28,45,0.08);
    border-radius: 22px;
    padding: 28px;
}
.inner-hero, .home-intro, .app-panel, .about-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    gap: 28px;
    align-items: center;
}
.eyebrow {
    display: inline-flex;
    color: #C90000;
    background: rgba(201,0,0,0.08);
    border: 1px solid rgba(201,0,0,0.12);
    border-radius: 999px;
    padding: 5px 12px;
    font-size: 13px;
    font-weight: 800;
    margin-bottom: 12px;
}
h1, h2, h3, .section-title {
    color: #C90000;
    line-height: 1.35;
    margin: 0 0 12px;
}
h1 { font-size: clamp(30px, 4vw, 46px); }
h2 { font-size: clamp(24px, 3vw, 34px); }
h3 { font-size: 20px; }
p { margin: 0 0 12px; }
.lead, .section-head p, .muted { color: #5D6673; }
.hero-actions, .card-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.inner-figure, .home-figure, .app-figure, .about-figure {
    margin: 0;
    background: #F7F8FA;
    border-radius: 18px;
    padding: 14px;
    overflow: hidden;
}
.inner-figure img, .home-figure img, .app-figure img, .about-figure img, .content-img {
    width: 100%;
    height: 260px;
    object-fit: contain;
    background: #F7F8FA;
    border-radius: 14px;
}
.section-head { margin-bottom: 18px; max-width: 820px; }
.grid-two, .grid-three, .grid-four, .product-grid, .review-grid, .faq-grid, .electronic-row, .combo-grid {
    display: grid;
    gap: 18px;
}
.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)); }
.product-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.review-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.electronic-row { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.combo-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card, .zone-card, .info-card, .review-card, .faq-card, .stat-card, .product-card, .small-card {
    background: #FFFFFF;
    border: 1px solid rgba(201,0,0,0.10);
    box-shadow: 0 12px 30px rgba(18,28,45,0.08);
    border-radius: 18px;
    padding: 20px;
    min-width: 0;
}
.zone-card img, .info-card img, .product-card img, .small-card img {
    width: 100%;
    height: 170px;
    object-fit: contain;
    background: #F7F8FA;
    border-radius: 14px;
    margin-bottom: 14px;
}
.info-card img { height: 190px; }
.stat-band {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    padding: 20px;
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(241,43,43,0.08), rgba(201,0,0,0.04));
    border: 1px solid rgba(201,0,0,0.12);
    margin-bottom: 34px;
}
.stat-card { box-shadow: none; background: rgba(255,255,255,0.84); }
.stat-card span, .card-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 34px;
    height: 34px;
    border-radius: 999px;
    color: #FFFFFF;
    background: #C90000;
    font-weight: 900;
    margin-bottom: 10px;
}
.product-card { padding: 14px; }
.product-card h3 { font-size: 18px; }
.split-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.8fr);
    gap: 18px;
    background: #F6F7F9;
    border-radius: 22px;
    padding: 24px;
    border: 1px solid rgba(201,0,0,0.08);
}
.check-list, .clean-list { list-style: none; padding: 0; margin: 0; }
.check-list li, .clean-list li {
    position: relative;
    padding-left: 24px;
    margin: 9px 0;
    color: #5D6673;
}
.check-list li::before, .clean-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.72em;
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: #C90000;
}
.notice-band {
    background: #F1F3F6;
    border-radius: 22px;
    border: 1px solid rgba(201,0,0,0.08);
    padding: 24px;
}
.review-card p { color: #5D6673; }
.review-card strong { display: block; color: #1F2329; margin-top: 10px; }
.faq-card h3 { color: #1F2329; }
.site-footer { margin-top: 44px; background: #11151C; color: #E7ECF3; }
.footer-inner {
    max-width: 1320px;
    margin: 0 auto;
    padding: 42px 24px 28px;
    display: grid;
    grid-template-columns: 1.3fr repeat(3, minmax(150px, 0.5fr));
    gap: 28px;
}
.footer-brand p, .footer-notice { color: rgba(231,236,243,0.78); }
.footer-col h3 { color: #FFFFFF; margin-bottom: 10px; }
.footer-col a { display: block; color: rgba(231,236,243,0.80); margin: 6px 0; }
.footer-col a:hover { color: #FFFFFF; }
.footer-notice {
    border-top: 1px solid rgba(255,255,255,0.08);
    max-width: 1320px;
    margin: 0 auto;
    padding: 16px 24px 28px;
    font-size: 14px;
}
.mobile-drawer, .drawer-mask, .mobile-bottom-nav { display: none; }
@media (max-width: 1180px) {
    .layout-shell { display: block; max-width: 1180px; }
    .side-category { display: none; }
    .grid-four, .electronic-row, .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .stat-band { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
    body { padding-top: 66px; padding-bottom: 76px; }
    .header-inner {
        min-height: 64px;
        padding: 0 14px;
        display: grid;
        grid-template-columns: 44px 1fr auto;
        gap: 10px;
    }
    .menu-toggle { display: block; }
    .nav-core { display: none; }
    .header-logo { justify-self: center; }
    .header-logo img { max-height: 44px; }
    .nav-register { min-height: 38px; padding: 8px 15px; font-size: 14px; }
    .layout-shell { padding: 16px 14px 0; }
    .banner-slider { height: clamp(150px, 48vw, 210px); border-radius: 16px; margin-bottom: 22px; }
    .slider-arrow { width: 34px; height: 34px; font-size: 24px; }
    .slider-arrow.prev { left: 8px; }
    .slider-arrow.next { right: 8px; }
    .inner-hero, .home-intro, .app-panel, .about-panel, .split-panel {
        grid-template-columns: 1fr;
        padding: 20px;
        border-radius: 18px;
    }
    .inner-figure img, .home-figure img, .app-figure img, .about-figure img, .content-img { height: 190px; }
    .grid-two, .grid-three, .grid-four, .product-grid, .review-grid, .faq-grid, .electronic-row, .combo-grid, .stat-band {
        grid-template-columns: 1fr;
    }
    .zone-card img, .info-card img, .product-card img, .small-card img { height: 150px; }
    .mobile-drawer {
        display: block;
        position: fixed;
        z-index: 1200;
        top: 0;
        bottom: 0;
        left: 0;
        width: 84vw;
        max-width: 320px;
        background: #FFFFFF;
        box-shadow: 18px 0 40px rgba(18,28,45,0.18);
        transform: translateX(-104%);
        transition: transform 0.25s ease;
        overflow: auto;
    }
    .drawer-open .mobile-drawer { transform: translateX(0); }
    .drawer-mask {
        position: fixed;
        display: block;
        inset: 0;
        z-index: 1190;
        background: rgba(17,21,28,0.42);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.25s ease;
    }
    .drawer-open .drawer-mask { opacity: 1; pointer-events: auto; }
    .drawer-open { overflow: hidden; }
    .drawer-head {
        min-height: 70px;
        padding: 12px 16px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        border-bottom: 1px solid rgba(201,0,0,0.10);
    }
    .drawer-close {
        width: 38px;
        height: 38px;
        border: 0;
        border-radius: 12px;
        background: #F6F7F9;
        color: #C90000;
        font-size: 26px;
        line-height: 1;
    }
    .drawer-links { padding: 14px; }
    .drawer-links a {
        display: block;
        padding: 11px 12px;
        border-radius: 12px;
        color: #1F2329;
        font-weight: 700;
    }
    .drawer-links a.active, .drawer-links a:hover { color: #C90000; background: rgba(201,0,0,0.08); }
    .mobile-bottom-nav {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        position: fixed;
        z-index: 1002;
        left: 0;
        right: 0;
        bottom: 0;
        background: #FFFFFF;
        border-top: 1px solid rgba(31,35,41,0.10);
        min-height: 62px;
        padding-bottom: env(safe-area-inset-bottom);
    }
    .mobile-bottom-nav a {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2px;
        color: #5D6673;
        font-size: 13px;
        font-weight: 800;
    }
    .mobile-bottom-nav a.active { color: #C90000; }
    .mobile-bottom-nav span { line-height: 1; font-size: 17px; }
    .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 460px) {
    h1 { font-size: 28px; }
    h2 { font-size: 23px; }
    .main-btn, .ghost-btn { width: 100%; }
    .header-actions .main-btn { width: auto; }
    .hero-actions { flex-direction: column; }
}