/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 0;
}

.header-content {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.title {
    font-size: 3rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.title i {
    color: #3498db;
}

.subtitle {
    font-size: 1.2rem;
    color: #7f8c8d;
    font-weight: 300;
}

/* 主要内容区域 */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    width: 100%;
    max-width: 1000px;
}

/* 工具卡片样式 */
.tool-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.tool-card.coming-soon {
    opacity: 0.7;
    cursor: not-allowed;
}

.tool-card.coming-soon:hover {
    transform: none;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.tool-icon {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 20px;
    text-align: center;
}

.tool-card.coming-soon .tool-icon {
    color: #bdc3c7;
}

.tool-content {
    flex: 1;
    text-align: center;
}

.tool-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 15px;
}

.tool-description {
    color: #7f8c8d;
    margin-bottom: 20px;
    line-height: 1.5;
}

.tool-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-tag {
    background: linear-gradient(135deg, #3498db, #2ecc71);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.coming-soon-tag {
    background: linear-gradient(135deg, #bdc3c7, #95a5a6);
}

.tool-arrow {
    text-align: center;
    color: #3498db;
    font-size: 1.2rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tool-card:hover .tool-arrow {
    opacity: 1;
}

/* 页脚样式 */
.footer {
    margin-top: 60px;
    padding: 30px 0;
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.footer-content {
    color: white;
}

.footer-content p {
    margin-bottom: 15px;
    opacity: 0.9;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.footer-links a {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
}

.footer-links a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 30px;
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    top: 15px;
    right: 20px;
}

.close:hover {
    color: #000;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .title {
        font-size: 2rem;
        flex-direction: column;
        gap: 10px;
    }
    
    .header-content {
        padding: 20px;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .tool-card {
        padding: 20px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.5rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .tool-card {
        padding: 15px;
    }
    
    .tool-icon {
        font-size: 2rem;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tool-card {
    animation: fadeInUp 0.6s ease forwards;
}

.tool-card:nth-child(1) { animation-delay: 0.1s; }
.tool-card:nth-child(2) { animation-delay: 0.2s; }
.tool-card:nth-child(3) { animation-delay: 0.3s; }
.tool-card:nth-child(4) { animation-delay: 0.4s; }

/* 转换器页面样式 */
.converter-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    max-width: 800px;
    margin: 0 auto;
}

.converter-header {
    text-align: center;
    margin-bottom: 40px;
}

.converter-header h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.converter-header h2 i {
    color: #27ae60;
}

.converter-header p {
    color: #7f8c8d;
    font-size: 1.1rem;
}

.converter-content {
    margin-bottom: 30px;
}

/* 上传区域样式 */
.upload-area {
    border: 3px dashed #3498db;
    border-radius: 15px;
    padding: 60px 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.upload-area:hover {
    border-color: #2980b9;
    background: #e8f4fd;
    transform: translateY(-2px);
}

.upload-area.drag-over {
    border-color: #27ae60;
    background: #e8f5e8;
    transform: scale(1.02);
}

.upload-icon {
    font-size: 4rem;
    color: #3498db;
    margin-bottom: 20px;
}

.upload-text h3 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.upload-text p {
    color: #7f8c8d;
    font-size: 1rem;
}

/* 进度区域样式 */
.progress-area {
    text-align: center;
    padding: 40px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #ecf0f1;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 20px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    color: #2c3e50;
    font-size: 1.1rem;
    font-weight: 500;
}

/* 结果区域样式 */
.result-area {
    text-align: center;
    padding: 40px;
}

.success-message {
    color: #27ae60;
}

.success-message i {
    font-size: 4rem;
    margin-bottom: 20px;
}

.success-message h3 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.success-message p {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: #2c3e50;
}


/* 重置提示样式 */
.reset-notification {
    background: linear-gradient(135deg, #3498db, #2ecc71);
    color: white;
    padding: 12px 20px;
    border-radius: 25px;
    margin: 20px 0;
    text-align: center;
    font-size: 0.95rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    animation: slideInUp 0.5s ease;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.reset-notification i {
    font-size: 1rem;
    animation: spin 1s linear infinite;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.download-btn {
    background: linear-gradient(135deg, #3498db, #2ecc71);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(52, 152, 219, 0.3);
}

/* 错误区域样式 */
.error-area {
    text-align: center;
    padding: 40px;
}

.error-message {
    color: #e74c3c;
}

.error-message i {
    font-size: 4rem;
    margin-bottom: 20px;
}

.error-message h3 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.error-message p {
    font-size: 1.1rem;
    color: #2c3e50;
}

/* 转换器页脚样式 */
.converter-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #ecf0f1;
}

.back-btn {
    background: #95a5a6;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 20px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.back-btn:hover {
    background: #7f8c8d;
    transform: translateY(-2px);
}

/* 模态框内容样式 */
.modal-content-text {
    line-height: 1.8;
}

.modal-content-text h3 {
    color: #2c3e50;
    margin-bottom: 15px;
}

.modal-content-text h4 {
    color: #34495e;
    margin: 20px 0 10px 0;
}

.modal-content-text ul, .modal-content-text ol {
    margin: 10px 0;
    padding-left: 20px;
}

.modal-content-text li {
    margin: 5px 0;
}

.contact-info {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
}

.contact-info p {
    margin: 10px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-info i {
    color: #3498db;
    width: 20px;
}

/* 响应式设计 - 转换器页面 */
@media (max-width: 768px) {
    .converter-container {
        padding: 20px;
        margin: 10px;
    }
    
    .converter-header h2 {
        font-size: 2rem;
        flex-direction: column;
        gap: 10px;
    }
    
    .upload-area {
        padding: 40px 20px;
    }
    
    .upload-icon {
        font-size: 3rem;
    }
    
    .upload-text h3 {
        font-size: 1.2rem;
    }
}