:root {
            --brand-royal: #1B278C;
            --brand-dark: #10183B;
            --brand-blue: #2055E8;
            --brand-teal: #00C8CC;
            --brand-mint: #59E2CE;
            --bg-light: #F3F5FA;
            --bg-white: #FFFFFF;
            --text-main: #182342;
            --text-muted: #5A6A85;
            --border-light: #E5EAF4;
            --accent-purple: #9333EA;
            --header-height: 72px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--header-height);
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            color: var(--text-main);
            background-color: var(--brand-royal);
            line-height: 1.6;
            overflow-x: hidden;
            position: relative;
        }

        body.modal-open {
            overflow: hidden !important;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 clamp(16px, 4vw, 32px);
            position: relative;
            z-index: 2;
        }

        /* 1. 顶部导航栏 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(27, 39, 140, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.15);
            z-index: 1000;
            transition: all 0.3s ease;
        }

        .nav-container {
            display: grid;
            grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
            align-items: center;
            height: 100%;
        }

        .nav-container > .logo-wrapper {
            grid-column: 1;
            grid-row: 1;
            justify-self: start;
        }

        .nav-container > .nav-links {
            grid-column: 2;
            grid-row: 1;
            justify-self: center;
            white-space: nowrap;
        }

        .nav-container > .mobile-menu-btn {
            grid-column: 3;
            grid-row: 1;
            justify-self: end;
        }

        /* Keep the centered navigation clear of the logo on narrower screens. */
        @media (max-width: 1100px) {
            .nav-container > .nav-links {
                display: none;
            }
            .nav-container > .mobile-menu-btn {
                display: flex;
            }
        }

        .logo-wrapper {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            background: rgba(255, 255, 255, 0.95);
            padding: 6px 14px;
            border-radius: 4px;
            transition: opacity 0.2s;
        }

        .logo-img {
            height: clamp(24px, 4vw, 32px);
            width: auto;
            object-fit: contain;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: clamp(16px, 3vw, 36px);
            list-style: none;
        }

        .nav-links a {
            text-decoration: none;
            color: rgba(255, 255, 255, 0.88);
            font-weight: 500;
            font-size: 15px;
            transition: color 0.2s;
            padding: 8px 4px;
        }

        .nav-links a:hover,
        .nav-links a:focus-visible {
            color: var(--brand-mint);
            outline: none;
        }



        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 26px;
            color: white;
            min-width: 44px;
            min-height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: 4px;
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            height: calc(100vh - var(--header-height));
            background: var(--brand-dark);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 32px 24px;
            z-index: 999;
            overflow-y: auto;
        }

        .mobile-drawer.active {
            display: block;
        }

        .mobile-drawer ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .mobile-drawer a {
            text-decoration: none;
            color: white;
            font-size: 18px;
            font-weight: 600;
            display: block;
            padding: 12px 16px;
            border-radius: 6px;
            background: rgba(255, 255, 255, 0.05);
        }

        /* 2. 首屏 Hero */
        .hero {
            position: relative;
            padding-top: calc(var(--header-height) + clamp(30px, 6vw, 80px));
            padding-bottom: clamp(60px, 8vw, 120px);
            overflow: hidden;
            background-color: var(--brand-royal);
        }

        .brochure-geom-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1;
            opacity: 0.35;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: clamp(32px, 5vw, 60px);
            align-items: center;
            position: relative;
            z-index: 3;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--brand-mint);
            margin-bottom: 20px;
            background: rgba(255, 255, 255, 0.1);
            padding: 6px 14px;
            border-radius: 2px;
            border-left: 3px solid var(--brand-mint);
        }

        .hero h1 {
            font-size: clamp(28px, 5vw, 52px);
            font-weight: 800;
            color: #FFFFFF;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
            word-break: break-word;
        }

        .hero h1 span {
            color: var(--brand-mint);
            display: inline-block;
        }

        .hero p {
            font-size: clamp(15px, 2vw, 18px);
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 580px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .btn-primary {
            background: var(--brand-teal);
            color: var(--brand-dark);
            padding: 14px 28px;
            border-radius: 4px;
            text-decoration: none;
            font-weight: 700;
            font-size: 15px;
            transition: all 0.2s;
            box-shadow: 0 4px 14px rgba(0, 200, 204, 0.3);
            min-height: 48px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .btn-primary:hover {
            background: var(--brand-mint);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: transparent;
            color: white;
            padding: 14px 26px;
            border-radius: 4px;
            text-decoration: none;
            font-weight: 600;
            font-size: 15px;
            border: 1px solid rgba(255, 255, 255, 0.3);
            transition: all 0.2s;
            min-height: 48px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .btn-secondary:hover {
            border-color: var(--brand-mint);
            color: var(--brand-mint);
            background: rgba(255, 255, 255, 0.05);
        }

        /* 3. 重叠式交互轮播系统 (CoverFlow Stack) */
        .poster-carousel-wrapper {
            position: relative;
            width: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            user-select: none;
            -webkit-user-select: none;
        }

        .poster-stack-container {
            position: relative;
            width: 100%;
            height: clamp(380px, 48vw, 480px);
            display: flex;
            align-items: center;
            justify-content: center;
            perspective: 1000px;
            touch-action: pan-y pinch-zoom;
            cursor: grab;
        }

        .poster-stack-container:active {
            cursor: grabbing;
        }

        .poster-card {
            position: absolute;
            width: clamp(220px, 32vw, 290px);
            height: clamp(320px, 45vw, 420px);
            background: transparent;
            border-radius: 12px;
            transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.4s ease, box-shadow 0.4s ease;
            will-change: transform, opacity;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .poster-card img {
            width: 100%;
            height: 100%;
            object-fit: contain;
            border-radius: 10px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.35);
            display: block;
            pointer-events: none;
        }

        .poster-card.state-center {
            z-index: 10;
            transform: translateX(0) scale(1) rotate(0deg);
            opacity: 1;
            filter: brightness(1);
            cursor: pointer;
        }

        .poster-card.state-center:hover {
            transform: translateX(0) scale(1.03) rotate(0deg);
            box-shadow: 0 20px 45px rgba(0, 0, 0, 0.45);
        }

        .poster-card.state-left {
            z-index: 5;
            transform: translateX(clamp(-110px, -18vw, -150px)) scale(0.88) rotate(-4deg);
            opacity: 0.7;
            filter: brightness(0.85);
            cursor: pointer;
        }

        .poster-card.state-right {
            z-index: 5;
            transform: translateX(clamp(110px, 18vw, 150px)) scale(0.88) rotate(4deg);
            opacity: 0.7;
            filter: brightness(0.85);
            cursor: pointer;
        }

        .poster-card.state-hidden {
            z-index: 1;
            transform: translateX(0) scale(0.7) rotate(0deg);
            opacity: 0;
            pointer-events: none;
        }

        .carousel-nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 380px;
            margin-top: 20px;
            padding: 0 10px;
        }

        .carousel-arrow-btn {
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: white;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background 0.2s, border-color 0.2s;
            font-size: 18px;
            flex-shrink: 0;
        }

        .carousel-arrow-btn:hover,
        .carousel-arrow-btn:focus-visible {
            background: var(--brand-teal);
            border-color: var(--brand-teal);
            color: var(--brand-dark);
            outline: none;
        }

        .carousel-dots {
            display: flex;
            gap: 8px;
            align-items: center;
        }

        .carousel-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.3);
            border: none;
            cursor: pointer;
            transition: background 0.3s, transform 0.3s;
            padding: 0;
        }

        .carousel-dot.active {
            background: var(--brand-mint);
            transform: scale(1.3);
        }

        .carousel-info-bar {
            text-align: center;
            margin-top: 14px;
        }

        .carousel-product-title {
            font-size: 17px;
            font-weight: 700;
            color: white;
            margin-bottom: 4px;
        }

        .carousel-detail-link {
            font-size: 14px;
            color: var(--brand-mint);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: opacity 0.2s;
        }

        .carousel-detail-link:hover {
            opacity: 0.85;
            text-decoration: underline;
        }

        .carousel-hint {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 6px;
        }

        /* 4. 公司宣传视频专区 */
        .company-video-section {
            background: var(--brand-dark);
            padding: clamp(60px, 8vw, 100px) 0;
            color: white;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .video-card-trigger {
            position: relative;
            width: 100%;
            max-width: 960px;
            margin: 0 auto;
            border-radius: 12px;
            overflow: hidden;
            background: #000;
            cursor: pointer;
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
            border: 1px solid rgba(255, 255, 255, 0.15);
            display: block;
            outline: none;
            transition: transform 0.3s, border-color 0.3s;
        }

        .video-card-trigger:hover,
        .video-card-trigger:focus-visible {
            transform: translateY(-4px);
            border-color: var(--brand-mint);
        }

        .video-cover-container {
            position: relative;
            width: 100%;
            padding-top: 56.25%;
            background-color: #182342;
        }

        .video-cover-img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .video-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(16, 24, 59, 0.2) 0%, rgba(16, 24, 59, 0.75) 100%);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 24px;
            text-align: center;
        }

        .play-btn-circle {
            width: clamp(56px, 8vw, 80px);
            height: clamp(56px, 8vw, 80px);
            background: var(--brand-teal);
            color: var(--brand-dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            box-shadow: 0 0 30px rgba(0, 200, 204, 0.5);
            transition: transform 0.3s, background 0.3s;
        }

        .play-btn-circle svg {
            width: clamp(24px, 4vw, 36px);
            height: clamp(24px, 4vw, 36px);
            fill: currentColor;
            margin-left: 4px;
        }

        .video-card-trigger:hover .play-btn-circle {
            transform: scale(1.1);
            background: var(--brand-mint);
        }

        .video-title-text {
            font-size: clamp(16px, 3vw, 22px);
            font-weight: 700;
            color: white;
            letter-spacing: 0.5px;
        }

        /* 5. 品牌介绍 (About Hub) */
        .brand-hub {
            padding: clamp(60px, 8vw, 120px) 0;
            background: var(--bg-light);
            color: var(--text-main);
            position: relative;
            border-bottom: 1px solid var(--border-light);
        }

        .section-header {
            max-width: 720px;
            margin-bottom: clamp(32px, 5vw, 60px);
        }

        .section-tag {
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--brand-blue);
            margin-bottom: 12px;
            display: block;
        }

        .section-header h2 {
            font-size: clamp(26px, 4vw, 38px);
            font-weight: 800;
            color: var(--brand-dark);
            line-height: 1.25;
            letter-spacing: -0.5px;
        }

        .brand-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: clamp(32px, 5vw, 60px);
            align-items: center;
        }

        .brand-quote-box {
            background: var(--bg-white);
            border-left: 4px solid var(--brand-royal);
            padding: clamp(24px, 4vw, 36px);
            border-radius: 0 8px 8px 0;
            box-shadow: 0 10px 30px rgba(27, 39, 140, 0.05);
        }

        .brand-quote-box p {
            font-size: clamp(18px, 2.5vw, 22px);
            font-weight: 600;
            color: var(--brand-royal);
            line-height: 1.5;
            margin-bottom: 16px;
        }

        .brand-quote-box span {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        .brand-text-content p {
            font-size: clamp(15px, 2vw, 16px);
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        /* 6. 产品目录索引区 */
        .products-directory {
            padding: clamp(60px, 8vw, 120px) 0;
            background: var(--brand-dark);
            color: white;
            position: relative;
            overflow: hidden;
        }

        .products-directory .section-tag {
            color: var(--brand-mint);
        }

        .products-directory .section-header h2 {
            color: white;
        }

        .directory-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: clamp(20px, 3vw, 30px);
            margin-top: 40px;
        }

        .directory-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            padding: clamp(24px, 3vw, 36px) clamp(20px, 2.5vw, 30px);
            position: relative;
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            text-decoration: none;
            backdrop-filter: blur(10px);
            min-width: 0;
        }

        .directory-card:hover,
        .directory-card:focus-visible {
            transform: translateY(-6px);
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--brand-teal);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            outline: none;
        }

        .dir-num {
            font-size: clamp(26px, 4vw, 32px);
            font-weight: 800;
            color: rgba(255, 255, 255, 0.2);
            margin-bottom: 16px;
            transition: color 0.3s;
        }

        .directory-card:hover .dir-num {
            color: var(--brand-mint);
        }

        .directory-card h3 {
            font-size: clamp(18px, 2.5vw, 20px);
            font-weight: 700;
            color: white;
            margin-bottom: 12px;
        }

        .directory-card p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.6;
            margin-bottom: 24px;
        }

        .dir-action {
            font-size: 14px;
            font-weight: 600;
            color: var(--brand-mint);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* 7. 产品详细展示区 */
        .product-detail-section {
            padding: clamp(60px, 8vw, 120px) 0;
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-light);
            position: relative;
        }

        .product-detail-section:nth-child(even) {
            background: var(--bg-white);
        }

        .product-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: clamp(32px, 6vw, 80px);
            align-items: center;
        }

        .product-split.reverse {
            direction: rtl;
        }

        .product-split.reverse > * {
            direction: ltr;
        }

        .product-media-box {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: 12px;
            padding: clamp(20px, 4vw, 40px);
            text-align: center;
            box-shadow: 0 16px 40px rgba(27, 39, 140, 0.06);
            position: relative;
            min-width: 0;
        }

        .product-detail-section:nth-child(even) .product-media-box {
            background: var(--bg-light);
        }

        .product-media-box img {
            max-width: 100%;
            height: clamp(240px, 35vw, 380px);
            object-fit: contain;
        }

        .product-badge-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            padding: 4px 12px;
            border-radius: 4px;
            margin-bottom: 16px;
        }

        .badge-purple { background: rgba(147, 51, 234, 0.1); color: var(--accent-purple); }
        .badge-mint { background: rgba(89, 226, 206, 0.2); color: #0E7490; }
        .badge-blue { background: rgba(32, 85, 232, 0.1); color: var(--brand-blue); }

        .product-info h2 {
            font-size: clamp(24px, 4vw, 34px);
            font-weight: 800;
            color: var(--brand-dark);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .product-subtitle {
            font-size: clamp(16px, 2.5vw, 18px);
            font-weight: 600;
            color: var(--brand-royal);
            margin-bottom: 20px;
        }

        .product-desc {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .feature-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .feature-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.5;
        }

        .feature-dot {
            width: 6px;
            height: 6px;
            background: var(--brand-royal);
            border-radius: 50%;
            margin-top: 8px;
            flex-shrink: 0;
        }

        /* 8. 应用场景板块 */
        .scenarios-section {
            padding: clamp(60px, 8vw, 120px) 0;
            background: var(--brand-royal);
            color: white;
            position: relative;
            overflow: hidden;
        }

        .scenarios-section .section-tag {
            color: var(--brand-mint);
        }

        .scenarios-section .section-header h2 {
            color: white;
        }

        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: clamp(20px, 3vw, 30px);
            margin-top: 40px;
        }

        .scenario-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 8px;
            padding: clamp(24px, 3vw, 40px) clamp(20px, 2.5vw, 30px);
            backdrop-filter: blur(10px);
            transition: transform 0.3s, background 0.3s;
            min-width: 0;
        }

        .scenario-card:hover {
            transform: translateY(-6px);
            background: rgba(255, 255, 255, 0.09);
            border-color: var(--brand-mint);
        }

        .scenario-icon {
            width: 48px;
            height: 48px;
            background: rgba(255, 255, 255, 0.1);
            color: var(--brand-mint);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .scenario-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: white;
            margin-bottom: 12px;
        }

        .scenario-card p {
            font-size: 15px;
            color: #CBD5E1;
            line-height: 1.7;
        }

        /* 9. 联系我们与页脚 (单栏清爽布局) */
        .footer-contact {
            background: var(--brand-dark);
            color: white;
            padding: clamp(50px, 7vw, 90px) 0 36px 0;
            position: relative;
            overflow: hidden;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .contact-content-wrapper {
            max-width: 800px;
            margin-bottom: 50px;
        }

        .contact-info h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .contact-info p {
            font-size: 16px;
            color: #94A3B8;
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .contact-details {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .contact-item {
            display: flex;
            flex-wrap: wrap;
            align-items: baseline;
            gap: 12px;
            font-size: 15px;
            color: #CBD5E1;
            word-break: break-word;
        }

        .contact-item strong {
            color: white;
            min-width: 90px;
        }

        .contact-item a {
            color: #CBD5E1;
            text-decoration: none;
            transition: color 0.2s;
        }

        .contact-item a:hover {
            color: var(--brand-mint);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: #64748B;
        }

        .footer-logo-text {
            font-weight: 700;
            color: white;
        }

        .back-to-top {
            position: fixed;
            bottom: 24px;
            right: 24px;
            width: 48px;
            height: 48px;
            background: var(--brand-teal);
            color: var(--brand-dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            box-shadow: 0 4px 16px rgba(0,0,0,0.3);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 998;
            font-weight: 700;
            font-size: 18px;
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }

        .back-to-top:hover {
            background: var(--brand-mint);
            transform: translateY(-3px);
        }

        /* 10. 全局视频弹窗 Modal */
        .video-modal {
            position: fixed;
            inset: 0;
            z-index: 2000;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: clamp(12px, 3vw, 24px);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }

        .video-modal.active {
            opacity: 1;
            visibility: visible;
        }

        .video-modal-backdrop {
            position: absolute;
            inset: 0;
            background: rgba(10, 15, 40, 0.88);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .video-modal-dialog {
            position: relative;
            width: 100%;
            max-width: 900px;
            max-height: calc(100vh - 40px);
            background: #10183B;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 25px 60px rgba(0,0,0,0.6);
            display: flex;
            flex-direction: column;
            z-index: 2;
        }

        .video-modal-header {
            padding: 14px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            background: rgba(255,255,255,0.02);
        }

        .video-modal-title {
            font-size: 16px;
            font-weight: 700;
            color: white;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            padding-right: 12px;
        }

        .modal-close-btn {
            background: rgba(255, 255, 255, 0.1);
            border: none;
            color: white;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 20px;
            transition: background 0.2s;
            flex-shrink: 0;
        }

        .modal-close-btn:hover,
        .modal-close-btn:focus-visible {
            background: rgba(255, 255, 255, 0.25);
            outline: none;
        }

        .video-player-wrapper {
            position: relative;
            width: 100%;
            background: #000;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .video-player-wrapper video {
            width: 100%;
            max-height: 65vh;
            display: block;
            outline: none;
        }

        .video-modal-controls {
            padding: 12px 20px;
            background: rgba(0, 0, 0, 0.4);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .speed-control-box {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: #94A3B8;
        }

        .speed-buttons {
            display: flex;
            gap: 4px;
            flex-wrap: wrap;
        }

        .speed-btn {
            background: rgba(255, 255, 255, 0.1);
            border: none;
            color: white;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, color 0.2s;
            min-height: 32px;
            display: inline-flex;
            align-items: center;
        }

        .speed-btn.active,
        .speed-btn:hover {
            background: var(--brand-teal);
            color: var(--brand-dark);
        }

        .video-error-msg {
            display: none;
            padding: 20px;
            text-align: center;
            color: #FF6B6B;
            font-size: 14px;
            background: rgba(255, 107, 107, 0.1);
            border-top: 1px solid rgba(255, 107, 107, 0.2);
        }

        .video-error-msg a {
            color: var(--brand-mint);
            text-decoration: underline;
            margin-top: 8px;
            display: inline-block;
        }

        /* 响应式断点适配 */
        @media (max-width: 1180px) {
            .hero-grid,
            .brand-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .directory-grid,
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .directory-grid > *:last-child,
            .scenarios-grid > *:last-child {
                grid-column: span 2;
            }
        }

        @media (max-width: 900px) {
            .nav-links {
                display: none;
            }

            .mobile-menu-btn {
                display: flex;
            }

            .product-split,
            .product-split.reverse {
                grid-template-columns: 1fr;
                gap: 32px;
                direction: ltr;
            }

            .product-split.reverse > * {
                direction: ltr;
            }

            .product-media-box {
                max-width: 580px;
                margin: 0 auto;
                width: 100%;
            }
        }

        @media (max-width: 600px) {
            .directory-grid,
            .scenarios-grid {
                grid-template-columns: 1fr;
            }

            .directory-grid > *:last-child,
            .scenarios-grid > *:last-child {
                grid-column: span 1;
            }

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .btn-primary, .btn-secondary {
                width: 100%;
            }

            .video-modal-controls {
                flex-direction: column;
                align-items: flex-start;
            }

            /* 窄屏下联系方式上下排列 */
            .contact-item {
                flex-direction: column;
                gap: 4px;
            }
            .contact-item strong {
                min-width: auto;
            }
        }
    
/* Publishing fixes preserve the supplied layout and palette. */
button,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}
button{font-family:inherit}a:focus-visible,button:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--brand-mint)!important;outline-offset:5px}
.skip-link{position:fixed;left:12px;top:-100px;z-index:3000;padding:12px 18px;background:white;color:var(--brand-dark)}.skip-link:focus{top:12px}
.nav-actions{grid-column:3;grid-row:1;justify-self:end;display:flex;gap:20px;align-items:center}
.language-link{font-size:13px;font-weight:600;color:white;text-decoration:none;padding:10px 4px;min-height:44px;display:inline-flex;align-items:center}
.logo-img{height:46px;width:83px;display:block}.logo-wrapper{padding:4px 10px}
.poster-card{text-decoration:none;border:0}.poster-card:focus-visible{outline-offset:6px}
.carousel-dots{gap:0}.carousel-dot{width:36px;height:44px;border-radius:0;background:none;position:relative}.carousel-dot:after{content:'';position:absolute;inset:17px 13px;border-radius:50%;background:#9da6ce}.carousel-dot.active{transform:none;background:none}.carousel-dot.active:after{background:var(--brand-mint);transform:scale(1.3)}
.carousel-hint{color:#c1c8e3}.dir-num{color:#9ca9c3}.footer-bottom{color:#a8b6cb}.company-video-section .section-tag{color:var(--brand-mint)}
.product-media-box img{display:block;width:100%;max-width:100%;margin:auto}
.product-media-box{overflow:hidden}.product-badge-tag{letter-spacing:1px;overflow-wrap:anywhere}
.video-error-msg:not([hidden]){display:block}.video-error-msg[hidden]{display:none}
.video-modal-dialog{overflow-y:auto;max-height:calc(100dvh - 32px)}.video-player-wrapper video{max-height:60dvh;aspect-ratio:16/9;object-fit:contain}
.video-modal-header{flex-shrink:0}.video-modal-controls{flex-shrink:0}.modal-close-btn{width:44px;height:44px}.speed-btn{min-height:40px}
body.menu-open{overflow:hidden}.mobile-drawer{height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.back-to-top{right:max(16px,env(safe-area-inset-right));bottom:max(16px,env(safe-area-inset-bottom))}
html[lang=en] .hero h1{font-size:clamp(30px,4.2vw,52px)}html[lang=en] .nav-links{gap:18px}html[lang=en] .nav-links a{font-size:14px}html[lang=en] .product-info h2{line-height:1.25;font-size:clamp(24px,3vw,32px)}html[lang=en] .product-badge-tag{font-size:11px}html[lang=en] .contact-item strong{min-width:100px}
@media(max-width:600px){.nav-actions{gap:12px}.logo-img{height:42px;width:76px}.video-modal-title{white-space:normal;line-height:1.4;font-size:14px}.video-modal-header{padding:10px 14px}.carousel-product-title{padding-inline:8px;font-size:16px}.carousel-info-bar{max-width:100%}.poster-card{width:clamp(200px,60vw,270px);height:clamp(280px,80vw,360px)}.poster-stack-container{height:clamp(320px,94vw,410px)}.hero-tag{font-size:11px;letter-spacing:1.2px}.product-badge-tag{padding:6px 8px;font-size:10px}.product-media-box{padding:20px 14px}.product-media-box img{height:auto;aspect-ratio:16/9}.speed-control-box{flex-wrap:wrap;gap:6px}.video-modal-controls{padding:12px}.mobile-drawer ul{gap:6px}.mobile-drawer{padding:14px 20px}.video-card-trigger{min-width:0}.video-title-text{line-height:1.5}.footer-bottom{line-height:1.8}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.poster-card{will-change:auto}}
@media print{header,.video-modal,.back-to-top,.carousel-nav-bar{display:none!important}body{background:white}.hero{padding-top:30px}}

.poster-stack-container{touch-action:pan-y}
.badge-purple{color:#8024ce}

.video-player-wrapper{position:relative}.video-loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;background:rgba(0,0,0,.45);color:#fff;font-size:14px;pointer-events:none}.video-loading[hidden]{display:none}.video-loading-spinner{width:30px;height:30px;border:3px solid #ffffff55;border-top-color:var(--brand-mint);border-radius:50%;animation:video-spin .8s linear infinite}@keyframes video-spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.video-loading-spinner{animation:none}}

.video-player-wrapper video[hidden]{display:none}