@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

        /* 核心支柱网格：电脑端 2 列 */
        .tb-philosophy-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
        }

        /* 独立卡片样式 */
        .tb-phil-card {
            background: #fafafa;
            border-radius: 16px;
            padding: 40px;
            transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            border: 1px solid #f0f0f0;
        }

        .tb-phil-card:hover {
            background: #ffffff;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.05);
            transform: translateY(-5px);
            border-color: #e5e5e5;
        }

        .tb-phil-icon {
            width: 32px;
            height: 32px;
            color: #111;
            margin-bottom: 20px;
        }

        .tb-phil-title {
            font-size: 18px;
            font-weight: 600;
            color: #111;
            margin: 0 0 15px 0;
            letter-spacing: -0.01em;
        }

        .tb-phil-text {
            font-size: 14.5px;
            color: #555;
            line-height: 1.7;
            margin: 0;
            font-weight: 400;
        }

        .tb-highlight {
            color: #111;
            font-weight: 600;
        }

        /* 底部标语 */
        .tb-bottom-manifesto {
            margin-top: 60px;
            text-align: center;
            padding: 40px 20px;
            background: #111;
            color: #fff;
            border-radius: 16px;
        }

        .tb-bottom-manifesto p {
            font-size: 18px;
            font-weight: 500;
            margin: 0;
            letter-spacing: 0.02em;
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            #tb-about-us-section { margin: 40px auto; }
            .tb-philosophy-grid { grid-template-columns: 1fr; gap: 20px; }
            .tb-phil-card { padding: 30px 25px; }
            .tb-bottom-manifesto { padding: 30px 20px; }
            .tb-bottom-manifesto p { font-size: 16px; }
        }