/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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: 0 20px;
}

/* 头部样式 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #4a5568;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    color: #667eea;
}

/* 按钮样式 */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 0.9rem;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #e2e8f0;
    color: #4a5568;
}

.btn-secondary:hover {
    background: #cbd5e0;
}

/* 主要内容区域 */
.main {
    padding: 2rem 0;
}

.hero-section {
    text-align: center;
    margin-bottom: 3rem;
    color: white;
}

.hero-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-section p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 过滤器样式 */
.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: none;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    font-size: 0.9rem;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #718096;
}

.filters select {
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    font-size: 0.9rem;
    cursor: pointer;
}

/* 企划网格 */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.project-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.project-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.project-content {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #2d3748;
}

.project-author {
    color: #718096;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.project-description {
    color: #4a5568;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.stars {
    display: flex;
    gap: 0.2rem;
}

.star {
    color: #fbbf24;
    font-size: 0.9rem;
}

.star.empty {
    color: #e2e8f0;
}

.rating-text {
    font-size: 0.9rem;
    color: #718096;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: #a0aec0;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.3s ease;
}

.modal-content.large {
    max-width: 800px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid #e2e8f0;
}

.modal-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2d3748;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: #718096;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.close-btn:hover {
    background: #f7fafc;
    color: #4a5568;
}

.modal-body {
    padding: 1.5rem;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #2d3748;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 0.9rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input[type="file"] {
    padding: 0.5rem;
    border: 2px dashed #e2e8f0;
    background: #f7fafc;
    cursor: pointer;
}

.form-group input[type="file"]:hover {
    border-color: #667eea;
    background: #f0f4ff;
}

.file-upload-info {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: #718096;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

/* 评论样式 */
.reviews-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #e2e8f0;
}

.review-form {
    background: #f7fafc;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.rating-input {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.rating-input input[type="radio"] {
    display: none;
}

.rating-input label {
    font-size: 1.5rem;
    color: #e2e8f0;
    cursor: pointer;
    transition: color 0.2s ease;
}

.rating-input input[type="radio"]:checked ~ label,
.rating-input label:hover,
.rating-input label:hover ~ label {
    color: #fbbf24;
}

.review-item {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border: 1px solid #e2e8f0;
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.reviewer-name {
    font-weight: 500;
    color: #2d3748;
}

.review-date {
    font-size: 0.8rem;
    color: #718096;
}

.review-rating {
    display: flex;
    gap: 0.2rem;
    margin-bottom: 0.5rem;
}

.review-comment {
    color: #4a5568;
    line-height: 1.5;
}

/* 加载动画 */
.loading-spinner {
    text-align: center;
    padding: 2rem;
    color: white;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-section h2 {
        font-size: 2rem;
    }
    
    .filters {
        flex-direction: column;
    }
    
    .search-box {
        min-width: auto;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        margin: 1rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: white;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.7;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.empty-state p {
    opacity: 0.8;
}