.biz6-container {
            --biz6-bg: #f8fafc;
            --biz6-card-bg: #ffffff;
            --biz6-card-bg-hover: #f1f5f9;
            --biz6-card-border: #e2e8f0;
            --biz6-card-border-hover: #cbd5e1;
            --biz6-accent: #1e56a0;
            --biz6-accent-light: #3b82f6;
            --biz6-text-primary: #1e293b;
            --biz6-text-secondary: #475569;
            --biz6-text-muted: #94a3b8;
            --biz6-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --biz6-shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.1);
            --biz6-transition-flex: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --biz6-transition-opacity: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --biz6-transition-color: 0.3s ease;
            --biz6-radius: 8px;
            --biz6-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --biz6-card-min-width: 72px;
            --biz6-card-expand-ratio: 3.6;
            box-sizing: border-box;
            font-family: var(--biz6-font-family);
            line-height: 1.5;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .biz6-container *,
        .biz6-container *::before,
        .biz6-container *::after {
            box-sizing: inherit;
        }

        .biz6-container {
            width: 100%;
            max-width: 1400px;
            margin: 0 auto;
            padding: 40px 24px 48px;
            background-color: var(--biz6-bg);
            border-radius: var(--biz6-radius);
            user-select: none;
            -webkit-tap-highlight-color: transparent;
        }

        .biz6-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .biz6-header-label {
            display: inline-block;
            font-size: 0.8rem;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            color: var(--biz6-accent);
            margin-bottom: 8px;
            font-weight: 500;
        }
        .biz6-header-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--biz6-text-primary);
            margin: 0;
            letter-spacing: 0.04em;
        }
        .biz6-header-line {
            display: block;
            width: 48px;
            height: 2px;
            background: var(--biz6-accent);
            margin: 14px auto 0;
            border-radius: 1px;
        }

        /* 关键修复：桌面端固定高度，消除跳动 */
        .biz6-cards-wrapper {
            display: flex;
            flex-direction: row;
            flex-wrap: nowrap;
            gap: 2px;
            width: 100%;
            height: 420px;            /* 固定高度替代min-height */
            position: relative;
            z-index: 1;
        }

        .biz6-card {
            position: relative;
            flex: 1 1 0;
            min-width: var(--biz6-card-min-width);
            background-color: var(--biz6-card-bg);
            border: 1px solid var(--biz6-card-border);
            border-radius: var(--biz6-radius);
            cursor: pointer;
            overflow: hidden;
            transition:
                flex var(--biz6-transition-flex),
                border-color var(--biz6-transition-color),
                background-color var(--biz6-transition-color),
                box-shadow var(--biz6-transition-color);
            display: flex;
            align-items: stretch;
            z-index: 1;
        }

        .biz6-card:hover {
            border-color: var(--biz6-card-border-hover);
            background-color: var(--biz6-card-bg-hover);
            box-shadow: var(--biz6-shadow-hover);
            z-index: 10;
        }

        .biz6-card.biz6-expanded {
            flex: var(--biz6-card-expand-ratio) 1 0 !important;
            border-color: var(--biz6-accent);
            background-color: var(--biz6-card-bg-hover);
            box-shadow: var(--biz6-shadow-hover);
            z-index: 10;
            cursor: default;
        }

        .biz6-card-inner {
            display: flex;
            width: 100%;
            height: 100%;
            position: relative;
            padding: 20px 10px;
            align-items: center;
            justify-content: center;
            transition: padding var(--biz6-transition-flex);
        }

        .biz6-card.biz6-expanded .biz6-card-inner {
            padding: 28px 24px;
            align-items: flex-start;
            justify-content: flex-start;
        }

        .biz6-card-index {
            position: absolute;
            bottom: 10px;
            right: 10px;
            font-size: 3.5rem;
            font-weight: 900;
            color: rgba(0, 0, 0, 0.04);
            pointer-events: none;
            line-height: 1;
            transition: all var(--biz6-transition-flex);
            letter-spacing: -0.02em;
        }
        .biz6-card.biz6-expanded .biz6-card-index {
            font-size: 5rem;
            bottom: 8px;
            right: 16px;
            color: rgba(30, 86, 160, 0.08);
        }

        .biz6-card-accent-bar {
            position: absolute;
            left: 0;
            top: 16px;
            bottom: 16px;
            width: 2px;
            background: transparent;
            border-radius: 0 2px 2px 0;
            transition: all var(--biz6-transition-color);
            pointer-events: none;
        }
        .biz6-card:hover .biz6-card-accent-bar,
        .biz6-card.biz6-expanded .biz6-card-accent-bar {
            background: var(--biz6-accent);
            width: 3px;
        }

        .biz6-card-default-view {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            height: 100%;
            transition: opacity var(--biz6-transition-opacity);
            opacity: 1;
            z-index: 2;
            position: relative;
        }
        .biz6-card.biz6-expanded .biz6-card-default-view {
            opacity: 0;
            pointer-events: none;
            position: absolute;
            inset: 0;
        }

        .biz6-card-title-vertical {
            writing-mode: vertical-rl;
            text-orientation: mixed;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--biz6-text-secondary);
            letter-spacing: 0.12em;
            line-height: 1.6;
            text-align: center;
            transition: color var(--biz6-transition-color), font-size var(--biz6-transition-flex);
            white-space: nowrap;
        }
        .biz6-card:hover .biz6-card-title-vertical {
            color: var(--biz6-accent);
        }
        .biz6-card.biz6-expanded .biz6-card-title-vertical {
            color: var(--biz6-accent-light);
        }

        .biz6-card-expanded-view {
            display: flex;
            flex-direction: column;
            width: 100%;
            height: 100%;
            opacity: 0;
            pointer-events: none;
            position: absolute;
            inset: 0;
            padding: 28px 24px 24px;
            transition: opacity var(--biz6-transition-opacity);
            z-index: 1;
            overflow-y: auto;
            justify-content: flex-start;
        }
        .biz6-card.biz6-expanded .biz6-card-expanded-view {
            opacity: 1;
            pointer-events: auto;
            position: relative;
            inset: auto;
        }

        .biz6-card-expanded-title {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--biz6-text-primary);
            margin: 0 0 6px 0;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }
        .biz6-card-expanded-subtitle {
            font-size: 0.78rem;
            color: var(--biz6-accent);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin: 0 0 20px 0;
            font-weight: 500;
        }
        .biz6-card-divider {
            width: 32px;
            height: 1px;
            background: var(--biz6-accent);
            margin: 0 0 18px 0;
            border: none;
            opacity: 0.6;
        }
        .biz6-card-detail-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .biz6-card-detail-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--biz6-text-secondary);
            line-height: 1.5;
            transition: color var(--biz6-transition-color);
            cursor: pointer;
            padding: 4px 0;
        }
        .biz6-card-detail-item:hover {
            color: var(--biz6-text-primary);
        }
        .biz6-card-detail-dot {
            flex-shrink: 0;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--biz6-accent);
            margin-top: 7px;
            transition: background var(--biz6-transition-color), transform var(--biz6-transition-color);
        }
        .biz6-card-detail-item:hover .biz6-card-detail-dot {
            background: var(--biz6-accent-light);
            transform: scale(1.5);
        }
        .biz6-card-detail-text {
            flex: 1;
            min-width: 0;
        }

        .biz6-overlay {
            display: none;
        }

        /* ========================================
           响应式设计 - 移动端
           ======================================== */
        @media (max-width: 768px) {
            .biz6-container {
                padding: 24px 12px 32px;
                border-radius: 6px;
            }
            .biz6-header {
                margin-bottom: 24px;
            }
            .biz6-header-title {
                font-size: 1.35rem;
            }
            .biz6-cards-wrapper {
                flex-wrap: wrap;
                gap: 8px;
                height: auto;          /* 移动端恢复自动高度 */
                min-height: auto;
            }
            .biz6-card {
                flex: 0 0 calc(50% - 4px) !important;
                min-width: 0;
                min-height: 160px;
                border-radius: 6px;
                transition:
                    flex-basis 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                    border-color var(--biz6-transition-color),
                    background-color var(--biz6-transition-color),
                    box-shadow var(--biz6-transition-color);
            }
            .biz6-card.biz6-expanded {
                flex: 0 0 100% !important;
                min-height: 280px;
                z-index: 10;
            }
            .biz6-card-inner {
                padding: 14px 6px;
            }
            .biz6-card.biz6-expanded .biz6-card-inner {
                padding: 20px 16px;
            }
            .biz6-card-title-vertical {
                font-size: 0.95rem;
                letter-spacing: 0.08em;
            }
            .biz6-card-index {
                font-size: 2.5rem;
                bottom: 6px;
                right: 6px;
            }
            .biz6-card.biz6-expanded .biz6-card-index {
                font-size: 3.5rem;
                bottom: 6px;
                right: 10px;
            }
            .biz6-card-expanded-view {
                padding: 20px 16px 16px;
            }
            .biz6-card-expanded-title {
                font-size: 1.15rem;
            }
            .biz6-card-expanded-subtitle {
                font-size: 0.7rem;
                margin-bottom: 14px;
            }
            .biz6-card-divider {
                margin-bottom: 12px;
            }
            .biz6-card-detail-item {
                font-size: 0.82rem;
                gap: 8px;
            }
            .biz6-card-accent-bar {
                top: 10px;
                bottom: 10px;
            }

            .biz6-overlay {
                display: block;
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.5);
                z-index: 5;
                opacity: 0;
                pointer-events: none;
                transition: opacity 0.35s ease;
            }
            .biz6-overlay.biz6-overlay-visible {
                opacity: 1;
                pointer-events: auto;
            }
        }

        @media (max-width: 420px) {
            .biz6-container {
                padding: 16px 8px 24px;
            }
            .biz6-header-title {
                font-size: 1.15rem;
            }
            .biz6-cards-wrapper {
                gap: 6px;
            }
            .biz6-card {
                flex: 0 0 calc(50% - 3px) !important;
                min-height: 140px;
                border-radius: 5px;
            }
            .biz6-card.biz6-expanded {
                flex: 0 0 100% !important;
                min-height: 260px;
            }
            .biz6-card-title-vertical {
                font-size: 0.85rem;
                letter-spacing: 0.06em;
            }
            .biz6-card-inner {
                padding: 10px 4px;
            }
            .biz6-card.biz6-expanded .biz6-card-inner {
                padding: 16px 12px;
            }
            .biz6-card-index {
                font-size: 2rem;
                bottom: 4px;
                right: 4px;
            }
            .biz6-card.biz6-expanded .biz6-card-index {
                font-size: 2.8rem;
            }
            .biz6-card-expanded-view {
                padding: 16px 12px 12px;
            }
            .biz6-card-expanded-title {
                font-size: 1rem;
            }
            .biz6-card-detail-item {
                font-size: 0.78rem;
            }
        }