body {
    margin: 0;
    min-height: 100vh;
    background-color: #f0f4f8;
    display: flex;
    flex-direction: column;
}

.header {
    background-color: #2c3e50;
    padding: 1rem 0;
    width: 100%;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 70%;
    margin: 0 auto;
    padding: 0 2rem;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-brand {
    color: white;
    font-size: 1.2rem;
    text-decoration: none;
    font-weight: bold;
}

.nav-back {
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-back:hover {
    color: #bdc3c7;
}

.nav-link {
    color: #bdc3c7;
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.nav-link:hover {
    color: white;
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
    color: white;
    background-color: rgba(255, 255, 255, 0.15);
}

/* 内容区域样式 */
.page-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem;
    min-height: calc(100vh - 80px);
}

/* 首页工具网格布局 */
.tools-grid {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* 工具页面容器 */
.container {
    background-color: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    width: 800px;
}

/* 响应式布局 */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .nav-left {
        width: 100%;
        justify-content: space-between;
    }

    .nav-right {
        width: 100%;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        -webkit-overflow-scrolling: touch;
    }

    .nav-link {
        font-size: 0.85rem;
        padding: 0.3rem 0.6rem;
    }

    .page-content {
        padding: 1rem;
    }

    .container {
        width: 95%;
        padding: 1.5rem;
    }

    .input-group {
        flex-direction: column;
        gap: 0.5rem;
    }

    .input-group label {
        width: 100%;
    }

    .slider-control {
        width: 100%;
    }

    .primary-btn, .secondary-btn {
        padding: 0.6rem 1.5rem;
        width: 100%;
    }

    .button-group {
        flex-direction: column;
        gap: 0.8rem;
    }

    .preview-wrapper {
        flex-direction: column;
    }

    #previewImage, .preview-frame {
        width: 100%;
        max-width: none;
    }
}

/* 平板设备适配 */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        width: 90%;
        max-width: 800px;
    }
}

/* 表单元素样式优化 */
.input-group {
    margin: 1.5rem 0;
}

.slider-control {
    display: flex;
    align-items: center;
    gap: 1rem;
}

input[type="range"] {
    flex: 1;
}

select, input[type="text"] {
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

/* 按钮样式优化 */
.button-group {
    margin: 2rem 0;
}

.primary-btn, .secondary-btn {
    min-width: 120px;
}

/* 打印样式优化 */
@media print {
    .header {
        display: none;
    }

    .container {
        box-shadow: none;
        padding: 0;
    }
}

/* Footer 样式 */
.footer {
    background-color: #f8f9fa;
    padding: 1rem 0;
    margin-top: auto;
    border-top: 1px solid #eee;
    text-align: center;
}

.footer-text {
    color: #666;
    font-size: 0.9rem;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
    line-height: 1.5;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .footer-text {
        font-size: 0.8rem;
        padding: 0 1.5rem;
    }
}