:root {
    --red: #C90000;
    --red-dark: #A80000;
    --red-light: #F12B2B;
    --ink: #1F2329;
    --muted: #5D6673;
    --soft: #8A93A0;
    --line: rgba(201, 0, 0, 0.12);
    --panel: #FFFFFF;
    --page: #FFFFFF;
    --subtle: #F6F7F9;
    --section: #F1F3F6;
    --footer: #11151C;
    --shadow: 0 12px 30px rgba(18, 28, 45, 0.08);
    --radius: 18px;
    --header-h: 76px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--page);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
    overflow-x: hidden;
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font: inherit; }

.container-wide {
    width: min(1380px, calc(100% - 40px));
    margin-inline: auto;
}

.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 {
    min-height: var(--header-h);
    display: grid;
    grid-template-columns: 210px minmax(0, 1fr) 118px;
    align-items: center;
    gap: 24px;
}
.logo { display: inline-flex; align-items: center; min-width: 0; }
.logo img { max-height: 52px; width: auto; }
.nav-core {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(12px, 2vw, 24px);
    white-space: nowrap;
    flex-wrap: nowrap;
    min-width: 0;
}
.nav-core a {
    position: relative;
    color: var(--ink);
    padding: 10px 4px;
    font-weight: 700;
    transition: .2s ease;
}
.nav-core a:hover,
.nav-core a.active { color: var(--red); }
.nav-core a.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -11px;
    height: 3px;
    border-radius: 999px;
    background: var(--red);
}
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 22px;
    border-radius: 999px;
    background: linear-gradient(180deg, var(--red-light) 0%, var(--red) 55%, var(--red-dark) 100%);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 10px 22px rgba(201,0,0,.18);
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-1px); box-shadow: 0 14px 28px rgba(201,0,0,.23); }
.header-register { justify-self: end; min-width: 96px; }
.menu-toggle { display: none; }

.site-main { padding-top: calc(var(--header-h) + 24px); }
.site-layout {
    display: grid;
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
}
.page-content { min-width: 0; }
.side-category {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    max-height: calc(100vh - var(--header-h) - 40px);
    overflow: auto;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 14px;
}
.side-title {
    padding: 4px 10px 10px;
    color: var(--red);
    font-weight: 900;
    font-size: 15px;
}
.side-category nav { display: grid; gap: 4px; }
.side-category a {
    padding: 9px 12px;
    border-radius: 12px;
    color: var(--ink);
    font-weight: 650;
    transition: .2s ease;
}
.side-category a:hover,
.side-category a.active { color: var(--red); background: rgba(201,0,0,.08); }

.banner-slider {
    width: 100%;
    margin: 0 auto 34px;
    border-radius: 22px;
    background: #F7F8FA;
    box-shadow: var(--shadow);
    overflow: hidden;
    position: relative;
    min-height: 260px;
    height: clamp(260px, 30vw, 360px);
}
.banner-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity .45s ease;
}
.banner-slide.active { opacity: 1; pointer-events: auto; }
.banner-slide img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #F7F8FA;
}
.banner-prev,
.banner-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: 50%;
    background: rgba(17,21,28,.58);
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    z-index: 3;
}
.banner-prev { left: 16px; }
.banner-next { right: 16px; }
.banner-dots {
    position: absolute;
    left: 50%;
    bottom: 14px;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 3;
}
.banner-dots button {
    width: 9px;
    height: 9px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: rgba(255,255,255,.65);
    cursor: pointer;
}
.banner-dots button.active { width: 24px; border-radius: 999px; background: #fff; }
.banner-caption,
.banner-text,
.slide-title,
.slide-desc,
.slide-content,
.slide-card,
.banner-card { display: none !important; }

.section { padding: 34px 0; }
.section-muted {
    margin-inline: -18px;
    padding: 38px 18px;
    background: var(--subtle);
    border-radius: 24px;
}
.section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 20px;
}
.section-head > div { max-width: 760px; }
.eyebrow {
    display: inline-flex;
    color: var(--red);
    font-weight: 900;
    font-size: 13px;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin-bottom: 8px;
}
h1, h2, h3, .section-title { color: var(--red); line-height: 1.28; }
h1 { font-size: clamp(34px, 4vw, 56px); margin: 0 0 16px; }
h2 { font-size: clamp(26px, 3vw, 38px); margin: 0; }
h3 { font-size: 20px; margin: 12px 0 8px; }
p { margin: 0 0 12px; color: var(--muted); }
.lead { font-size: 18px; color: #3C4551; }

.page-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr);
    gap: 34px;
    align-items: center;
    padding: 40px;
    border: 1px solid var(--line);
    border-radius: 26px;
    background: linear-gradient(135deg, #fff 0%, #f8f9fb 100%);
    box-shadow: var(--shadow);
    margin-bottom: 28px;
}
.page-hero.no-image { grid-template-columns: 1fr; }
.page-hero-copy { max-width: 760px; }
.page-hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.page-hero img {
    width: 100%;
    max-height: 280px;
    object-fit: contain;
    background: #F7F8FA;
    border-radius: 18px;
}
.secondary-link {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0 18px;
    border-radius: 999px;
    border: 1px solid var(--line);
    color: var(--red);
    font-weight: 800;
    background: #fff;
}

.intro-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(260px, .75fr);
    gap: 28px;
    align-items: center;
    padding: 30px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.intro-panel img {
    width: 100%;
    max-height: 260px;
    object-fit: contain;
    background: #F7F8FA;
    border-radius: 16px;
}

.feature-grid,
.product-grid,
.channel-grid,
.review-grid,
.summary-grid {
    display: grid;
    gap: 18px;
}
.feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.product-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.channel-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.summary-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.feature-card,
.product-card,
.channel-card,
.summary-card,
.review-card,
.info-card,
.card,
.zone-card {
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    border-radius: var(--radius);
}
.feature-card,
.channel-card,
.summary-card,
.info-card,
.card,
.zone-card { padding: 22px; }
.feature-card img,
.zone-card img,
.info-card img,
.content-img {
    width: 100%;
    height: 190px;
    object-fit: contain;
    background: #F7F8FA;
    border-radius: 14px;
    margin-bottom: 16px;
}
.product-card { overflow: hidden; }
.product-card img {
    width: 100%;
    height: 170px;
    object-fit: contain;
    background: #F7F8FA;
}
.product-card-body { padding: 18px; }
.text-link { color: var(--red); font-weight: 800; display: inline-flex; margin-top: 8px; }
.text-link:hover { text-decoration: underline; }

.channel-card { border-top: 4px solid var(--red); }
.channel-card a { color: var(--red); font-weight: 800; }
.summary-card { background: var(--red); color: #fff; border-color: var(--red); box-shadow: 0 14px 28px rgba(201,0,0,.18); }
.summary-card h3, .summary-card p { color: #fff; }
.summary-card .summary-number { font-size: 28px; font-weight: 900; opacity: .45; }

.split-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, .85fr);
    gap: 24px;
    align-items: stretch;
}
.split-layout.reverse > :first-child { order: 2; }
.media-panel,
.copy-panel {
    padding: 26px;
    border-radius: var(--radius);
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.media-panel img {
    width: 100%;
    height: 100%;
    min-height: 230px;
    max-height: 300px;
    object-fit: contain;
    background: #F7F8FA;
    border-radius: 14px;
}
.check-list { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 10px; }
.check-list li { position: relative; padding-left: 28px; color: var(--muted); }
.check-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--red);
    font-weight: 900;
}

.review-card { margin: 0; padding: 24px; }
.review-card p { color: var(--ink); font-size: 16px; }
.review-card footer { color: var(--soft); font-size: 14px; }
.review-index { color: var(--red); font-weight: 900; }

.faq-list { display: grid; gap: 12px; }
.faq-item {
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fff;
    box-shadow: 0 8px 20px rgba(18,28,45,.05);
    overflow: hidden;
}
.faq-item summary {
    cursor: pointer;
    list-style: none;
    padding: 18px 48px 18px 20px;
    position: relative;
    font-weight: 800;
    color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 20px; color: var(--red); font-size: 22px; top: 12px; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding: 0 20px 20px; margin: 0; }

.notice-box {
    padding: 24px 26px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, rgba(201,0,0,.08), rgba(201,0,0,.03));
    border: 1px solid var(--line);
}
.notice-box h2 { font-size: 24px; margin-bottom: 10px; }
.notice-box p { margin-bottom: 0; }

.service-steps { counter-reset: step; display: grid; gap: 16px; }
.service-step {
    counter-increment: step;
    position: relative;
    padding: 22px 22px 22px 78px;
    border-radius: 16px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.service-step::before {
    content: counter(step, decimal-leading-zero);
    position: absolute;
    left: 20px;
    top: 20px;
    color: var(--red);
    font-weight: 900;
    font-size: 24px;
}
.service-step h3 { margin-top: 0; }

.contact-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.contact-card { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background:#fff; box-shadow: var(--shadow); }
.contact-card h3 { margin-top: 0; }

.site-footer {
    margin-top: 70px;
    background: var(--footer);
    color: #E7ECF3;
    padding: 46px 0 18px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 34px;
}
.footer-logo img { max-height: 52px; width: auto; margin-bottom: 14px; }
.site-footer h2 { color: #fff; font-size: 18px; margin: 0 0 14px; }
.site-footer p { color: #BFC7D2; }
.site-footer section > a:not(.footer-logo):not(.footer-register) { display: block; color: #D8DEE7; margin: 8px 0; }
.site-footer a:hover { color: #fff; }
.footer-register { display: inline-flex; margin-top: 8px; color:#fff; font-weight:800; border-bottom:1px solid rgba(255,255,255,.55); }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding-top: 18px;
    margin-top: 28px;
    border-top: 1px solid rgba(255,255,255,.1);
    color: #AAB4C2;
    font-size: 14px;
}

.drawer-overlay,
.mobile-drawer,
.mobile-bottom-nav { display: none; }

@media (max-width: 1120px) {
    .header-inner { grid-template-columns: 180px minmax(0, 1fr) 108px; gap: 16px; }
    .nav-core { gap: 12px; }
    .site-layout { grid-template-columns: 210px minmax(0, 1fr); gap: 20px; }
    .product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .feature-grid, .channel-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .summary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: 1.4fr repeat(2, 1fr); }
    .footer-grid section:last-child { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
    :root { --header-h: 66px; }
    .container-wide { width: min(100% - 28px, 760px); }
    .header-inner {
        width: calc(100% - 24px);
        grid-template-columns: 54px minmax(0, 1fr) 84px;
        gap: 8px;
    }
    .menu-toggle {
        display: inline-grid;
        place-content: center;
        gap: 5px;
        width: 42px;
        height: 42px;
        border: 1px solid var(--line);
        border-radius: 12px;
        background: #fff;
        cursor: pointer;
    }
    .menu-toggle span { display:block; width:20px; height:2px; background:var(--ink); border-radius:999px; }
    .logo { justify-self: center; }
    .logo img { max-height: 43px; }
    .nav-core, .side-category { display: none; }
    .header-register { min-width: 78px; padding-inline: 14px; min-height: 40px; }
    .site-layout { display: block; }
    .site-main { padding-top: calc(var(--header-h) + 16px); }

    .drawer-overlay {
        display: block;
        position: fixed;
        inset: 0;
        z-index: 1190;
        background: rgba(17,21,28,.48);
        opacity: 0;
        visibility: hidden;
        transition: .25s ease;
    }
    .mobile-drawer {
        display: block;
        position: fixed;
        inset: 0 auto 0 0;
        z-index: 1200;
        width: min(84vw, 320px);
        background: #fff;
        transform: translateX(-102%);
        transition: transform .25s ease;
        overflow-y: auto;
        box-shadow: 18px 0 40px rgba(17,21,28,.16);
    }
    .drawer-open .drawer-overlay { opacity: 1; visibility: visible; }
    .drawer-open .mobile-drawer { transform: translateX(0); }
    .drawer-head {
        display:flex;
        align-items:center;
        justify-content:space-between;
        min-height:66px;
        padding:10px 14px;
        border-bottom:1px solid var(--line);
    }
    .drawer-logo img { max-height: 42px; width:auto; }
    .drawer-close { width:40px; height:40px; border:0; border-radius:12px; background:var(--subtle); color:var(--ink); font-size:28px; cursor:pointer; }
    .drawer-nav { display:grid; padding:12px 14px 90px; gap:4px; }
    .drawer-nav a { padding:12px 14px; border-radius:12px; font-weight:700; }
    .drawer-nav a:hover, .drawer-nav a.active { color:var(--red); background:rgba(201,0,0,.08); }

    .mobile-bottom-nav {
        position: fixed;
        left: 10px;
        right: 10px;
        bottom: 10px;
        z-index: 1100;
        min-height: 58px;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        align-items: center;
        background: rgba(255,255,255,.97);
        border: 1px solid var(--line);
        border-radius: 18px;
        box-shadow: 0 14px 34px rgba(18,28,45,.16);
        backdrop-filter: blur(10px);
    }
    .mobile-bottom-nav a { display:grid; place-items:center; gap:1px; font-size:12px; color:var(--muted); }
    .mobile-bottom-nav a span { font-size:19px; line-height:1; }
    .mobile-bottom-nav a.active { color:var(--red); font-weight:800; }
    body { padding-bottom: 84px; }

    .page-hero, .intro-panel, .split-layout { grid-template-columns: 1fr; padding: 26px; }
    .page-hero img { max-height: 230px; }
    .split-layout.reverse > :first-child { order: initial; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid section:last-child { grid-column: auto; }
    .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
    .container-wide { width: calc(100% - 22px); }
    .section { padding: 26px 0; }
    .section-muted { margin-inline: 0; padding: 28px 14px; }
    .banner-slider { height: 190px; min-height: 190px; border-radius: 16px; margin-bottom: 24px; }
    .banner-prev, .banner-next { width: 36px; height: 36px; font-size: 20px; }
    .page-hero { padding: 22px; gap: 22px; border-radius: 20px; }
    h1 { font-size: 34px; }
    h2 { font-size: 27px; }
    .lead { font-size: 16px; }
    .feature-grid, .channel-grid, .summary-grid, .review-grid, .product-grid { grid-template-columns: 1fr; }
    .feature-card img, .zone-card img, .info-card img, .content-img { height: 160px; }
    .product-card img { height: 150px; }
    .media-panel img { min-height: 190px; max-height: 230px; }
    .section-head { align-items: flex-start; flex-direction: column; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; }
}