* { margin: 0; padding: 0; box-sizing: border-box; font-family: "Microsoft YaHei", "PingFang SC", sans-serif; }
        :root {
            --primary-blue: #0056b3; --secondary-blue: #007BFF; --light-blue: #E6F2FF;
            --accent-orange: #FF6B35; --text-dark: #333; --text-light: #666;
            --white: #fff; --gray-bg: #f8fafc; --border-color: #eef2f7;
        }
        body { color: var(--text-dark); line-height: 1.6; background-color: var(--white); padding-top: 90px; }
        .about-page {
            background-color: var(--gray-bg);
            margin-top: 90px;
            padding-bottom: 60px;
        }

        /* 1. 头部大横幅 */
        .about-hero {
            background: linear-gradient(135deg, var(--primary-blue) 0%, #003366 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
            margin-bottom: 40px;
        }
        .about-hero h1 {
            font-size: 42px;
            font-weight: 600;
            letter-spacing: 2px;
            margin-bottom: 10px;
        }
        .about-hero p {
            font-size: 16px;
            opacity: 0.8;
        }

        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 15px; }

        /* 2. 公司简介卡片 */
        .intro-card {
            background: white;
            border-radius: 16px;
            box-shadow: 0 10px 40px rgba(0, 86, 179, 0.08);
            padding: 50px;
            margin-bottom: 40px;
            display: flex;
            gap: 50px;
            align-items: center;
        }
        .intro-card .intro-text { flex: 1; }
        .intro-card .intro-img { flex: 1; border-radius: 12px; overflow: hidden; }
        .intro-card .intro-img img { width: 100%; display: block; transition: transform 0.4s; }
        .intro-card .intro-img:hover img { transform: scale(1.05); }

        .section-tag {
            display: inline-block;
            background: var(--light-blue);
            color: var(--primary-blue);
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: bold;
            margin-bottom: 15px;
        }
        .section-title {
            font-size: 32px;
            color: var(--text-dark);
            margin-bottom: 20px;
            line-height: 1.3;
        }
        .section-text {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            text-align: justify;
        }

        /* 3. 数据里程碑 */
        .milestones {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 60px;
        }
        .milestone-item {
            background: white;
            padding: 30px;
            border-radius: 12px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
            border-bottom: 4px solid var(--primary-blue);
        }
        .milestone-item:hover { transform: translateY(-10px); }
        .milestone-number {
            font-size: 48px;
            font-weight: 700;
            color: var(--primary-blue);
            line-height: 1;
            margin-bottom: 10px;
        }
        .milestone-label { font-size: 15px; color: var(--text-light); }

        /* 4. 发展历程 (时间轴美化) */
        .timeline-section { margin-bottom: 60px; }
        .timeline {
            position: relative;
            padding: 40px 0;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            width: 3px;
            height: 100%;
            background: #004caa;
        }
        .timeline-item {
            display: flex;
            justify-content: flex-end;
            padding-right: 40px;
            position: relative;
            margin-bottom: 50px;
            width: 50%;
        }
        .timeline-item:nth-child(even) {
            justify-content: flex-start;
            padding-left: 40px;
            padding-right: 0;
            margin-left: 50%;
        }
        .timeline-content {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.06);
            width: 100%;
            position: relative;
        }
        /* 小三角 */
        .timeline-content::before {
            content: '';
            position: absolute;
            right: -10px;
            top: 20px;
            border-width: 10px 0 10px 10px;
            border-style: solid;
            border-color: transparent transparent transparent white;
        }
        .timeline-item:nth-child(even) .timeline-content::before {
            left: -10px;
            right: auto;
            border-width: 10px 10px 10px 0;
            border-color: transparent white transparent transparent;
        }
        .timeline-year {
            font-size: 18px;
            font-weight: bold;
            color: var(--accent-orange);
            margin-bottom: 8px;
        }
        /* 时间点圆点 */
        .timeline-item::before {
            content: '';
            position: absolute;
            right: -8px;
            top: 20px;
            width: 16px;
            height: 16px;
            background: white;
            border: 4px solid var(--primary-blue);
            border-radius: 50%;
            z-index: 1;
        }
        .timeline-item:nth-child(even)::before {
            left: -8px;
            right: auto;
        }

        /* 5. 企业文化 */
        .culture-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .culture-card {
            background: white;
            padding: 40px 30px;
            border-radius: 16px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }
        .culture-card:hover { background: var(--primary-blue); }
        .culture-icon {
            font-size: 48px;
            margin-bottom: 20px;
        }
        .culture-card h4 {
            font-size: 20px;
            margin-bottom: 10px;
            color: var(--text-dark);
            transition: color 0.3s;
        }
        .culture-card p {
            font-size: 14px;
            color: var(--text-light);
            transition: color 0.3s;
        }
        .culture-card:hover h4,
        .culture-card:hover p { color: white; }

        /* 响应式 */
        @media (max-width: 992px) {
            .intro-card { flex-direction: column; padding: 30px; }
            .milestones { grid-template-columns: repeat(2, 1fr); }
            .culture-grid { grid-template-columns: repeat(2, 1fr); }
            .timeline::before { left: 20px; }
            .timeline-item, .timeline-item:nth-child(even) {
                width: 100%;
                margin-left: 0;
                padding-left: 50px;
                padding-right: 0;
            }
            .timeline-item::before, .timeline-item:nth-child(even)::before { left: 12px; }
            .timeline-content::before { display: none; }
        }
        @media (max-width: 576px) {
            .milestones, .culture-grid { grid-template-columns: 1fr; }
            .about-hero h1 { font-size: 32px; }
        }