.feature-module * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: system-ui, -apple-system, sans-serif;
        }
        .feature-module {
            width: 100%;
            padding: 60px 20px;
        }
        .feature-main-title {
            text-align: center;
            font-size: clamp(28px, 4vw, 44px);
            color: #0f254c;
            font-weight: 600;
            margin-bottom: 50px;
        }
        /* 限定最大宽度1440px */
        .two-col-wrap {
            max-width: 1440px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
        }
        .col-block {
            background: #0f254c;
            padding: 40px 35px;
        }
        .item-box {
            padding: 24px 0;
            border-bottom: 1px solid rgba(255,255,255,0.15);
        }
        .item-box:last-child {
            border-bottom: none;
        }
        .item-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }
        .item-title {
            color: #fff;
            font-size: 19px;
            font-weight: 500;
        }
        .item-title a {
            color: #fff;
            text-decoration: underline;
        }
        .arrow-icon {
            color: #fff;
            font-size: 24px;
            transition: transform 0.24s ease;
        }
        .arrow-icon.active {
            transform: rotate(180deg);
        }
        .item-content {
            color: rgba(255,255,255,0.82);
            font-size: 16px;
            line-height: 1.7;
            margin-top: 14px;
            display: none;
        }
        .item-content.show {
            display: block;
        }
        /* 移动端适配 */
        @media (max-width: 900px) {
            .two-col-wrap {
                grid-template-columns: 1fr;
            }
            .col-block {
                padding: 30px 22px;
            }
            .item-title {
                font-size: 17px;
            }
            .item-box {
                padding: 18px 0;
            }
        }