/* 保持之前的字体设置... */
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    background-color: #f8fafc;
    -webkit-font-smoothing: antialiased;
}

#main-content-container {
    margin-left: 240px;
    padding: 60px 5vw;
    flex: 1;
    width: calc(100% - 240px);
    box-sizing: border-box;
}

/* 顶部文案美化 */
.header-section {
    max-width: 1100px;
    margin: 0 auto 80px auto;
}

.page-title {
    margin-bottom: 40px;
    color: #1a202c;
    font-size: 42px;
    font-weight: 800;
    text-align: center;
}

.copyright-card {
    background: #fff;
    border-radius: 20px;
    padding: 24px 32px;
    display: flex;
    align-items: center;
    gap: 24px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    border: 1px solid #edf2f7;
    margin-bottom: 48px;
}

/* 操作步骤说明区 */
.instruction-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
    border-radius: 24px;
    padding: 40px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
    border: 1px solid #e2e8f0;
}

.step-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 0 20px;
}

.step-number {
    font-size: 32px;
    font-weight: 800;
    color: #cbd5e0;
    margin-bottom: 12px;
    font-family: Georgia, serif; /* 使用衬线体增加艺术感 */
}

.step-content strong {
    display: block;
    font-size: 18px;
    color: #2d3748;
    margin-bottom: 8px;
}

.step-content p {
    font-size: 14px;
    color: #718096;
    line-height: 1.6;
    margin: 0;
}

.step-connector {
    width: 1px;
    height: 60px;
    background: #e2e8f0;
}

/* 列表网格控制 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, 310px);
    gap: 40px;
    justify-content: center;
}

/* 严格执行 310x415 尺寸 */
.card-item {
    width: 310px;
    height: 415px;
    border-radius: 16px;
    overflow: hidden;
    display: block;
    background: #fff;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.card-item:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 30px 60px rgba(0,0,0,0.12);
}

.image-wrapper {
    width: 310px;
    height: 415px;
    position: relative;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.hover-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: all 0.4s ease;
}

.card-item:hover .hover-overlay {
    opacity: 1;
}

.btn-view {
    background: #fff;
    color: #1a202c;
    padding: 12px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* 分类标题样式 */
.category-section {
    margin-bottom: 100px;
}

.category-title {
    font-size: 28px;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 32px;
    text-align: center;
    position: relative;
}

/* 标题装饰线 */
.category-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 4px;
    background: #3498db;
    margin: 12px auto 0;
    border-radius: 2px;
}

/* 移动端优化 */
@media (max-width: 1024px) {
    .instruction-section {
        flex-direction: column;
        gap: 30px;
        padding: 30px;
    }
    .step-connector {
        width: 80%;
        height: 1px;
    }
    .step-item {
        align-items: center;
        text-align: center;
    }
}