/* 重置样式和基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;
    --border-radius: 12px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 20px 0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.logo h1 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.logo span {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 400;
}

.nav {
    display: flex;
    align-items: center;
    gap: 30px;
    flex: 1;
}

/* 搜索框 */
.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: 50px;
    padding: 8px 16px;
    transition: var(--transition);
    min-width: 300px;
}

.search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-box input {
    border: none;
    background: none;
    outline: none;
    flex: 1;
    font-size: 16px;
    color: var(--text-primary);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box button {
    border: none;
    background: none;
    cursor: pointer;
    font-size: 18px;
    color: var(--text-muted);
    transition: var(--transition);
}

.search-box button:hover {
    color: var(--primary-color);
}

/* 过滤标签 */
.filter-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    border: 2px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 50px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: transparent;
    color: white;
}

/* 主要内容区域 */
.main {
    padding: 40px 0;
}

/* 联系信息卡片样式 */
.contact-info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
    padding: 0 20px;
}

.contact-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
    transition: left 0.5s;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.15);
}

.contact-card:hover::before {
    left: 100%;
}

.contact-icon {
    font-size: 32px;
    margin-bottom: 12px;
    display: block;
}

.contact-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 15px 0;
}

/* 二维码小图样式 */
.qr-mini-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.qr-mini {
    /* width: 60px; */
    height: 60px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: white;
    padding: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.qr-mini:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.qr-hint {
    font-size: 12px;
    color: var(--text-muted);
    cursor: pointer;
}

/* 联系详情样式 */
.contact-details {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.contact-email {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    padding: 8px 12px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 20px;
    transition: all 0.3s ease;
}

.contact-email:hover {
    background: rgba(102, 126, 234, 0.2);
    transform: scale(1.02);
}

.contact-hint {
    font-size: 12px;
    color: var(--text-muted);
}

/* 项目信息样式 */
.project-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.project-desc {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 14px;
}

.project-note {
    font-size: 12px;
    color: var(--text-muted);
}

/* 二维码模态框样式 */
.qr-modal-content {
    background: white;
    border-radius: 16px;
    width: 350px;
    max-width: 90vw;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: slideIn 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.qr-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 25px 15px;
    border-bottom: 1px solid var(--border-color);
}

.qr-modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.qr-modal-body {
    padding: 30px;
    text-align: center;
}

.qr-large {
    width: 200px;
    /* height: 200px; */
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    background: white;
    padding: 8px;
}

.qr-instruction {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* 统计信息 */
.stats {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    justify-content: center;
}

.stat-item {
    text-align: center;
    color: white;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
    margin-top: 4px;
}

/* 特效网格 */
.effects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

/* 特效卡片 */
.effect-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    cursor: pointer;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.effect-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 搜索框增强 */
.search-box {
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 249, 255, 0.9));
    border: 2px solid transparent;
    border-radius: 50px;
    padding: 10px 20px;
    transition: all 0.3s ease;
    min-width: 300px;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.1);
    backdrop-filter: blur(10px);
}

.search-box:focus-within {
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1), 0 6px 20px rgba(102, 126, 234, 0.15);
    transform: translateY(-1px);
    background: linear-gradient(135deg, #ffffff, #f8f9ff);
}

.search-box input {
    border: none;
    background: none;
    outline: none;
    flex: 1;
    font-size: 16px;
    color: var(--text-primary);
    font-weight: 500;
}

.search-box input::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

.search-box button {
    border: none;
    background: none;
    cursor: pointer;
    font-size: 18px;
    color: var(--text-muted);
    transition: all 0.3s ease;
    padding: 4px;
    border-radius: 50%;
}

.search-box button:hover {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
    transform: scale(1.1);
}

/* 清除搜索按钮增强 */
#clearSearchBtn {
    padding: 6px 10px;
    border: none;
    background: linear-gradient(135deg, #ff6b6b, #ee5a52);
    color: white;
    border-radius: 20px;
    cursor: pointer;
    margin-left: 8px;
    transition: all 0.3s ease;
    font-size: 12px;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(255, 107, 107, 0.3);
}

#clearSearchBtn:hover {
    background: linear-gradient(135deg, #ff5252, #e53935);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.4);
}

.effect-preview {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(45deg, #f7fafc, #edf2f7);
    border-radius: 8px 8px 0 0;
    cursor: pointer;
}

/* 预览占位符 */
.preview-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    transition: var(--transition);
}

.preview-placeholder.loading {
    background: linear-gradient(135deg, #667eea, #f093fb);
}

.placeholder-icon {
    font-size: 48px;
    margin-bottom: 12px;
    opacity: 0.9;
}

.placeholder-text {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
    opacity: 0.9;
}

.loading-dots {
    display: flex;
    gap: 4px;
}

.loading-dots::before,
.loading-dots::after {
    content: '';
    width: 6px;
    height: 6px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    animation: loadingPulse 1.4s infinite ease-in-out;
}

.loading-dots::before {
    animation-delay: 0s;
}

.loading-dots::after {
    animation-delay: 0.7s;
}

.preview-placeholder.loading .loading-dots::before,
.preview-placeholder.loading .loading-dots::after {
    animation: loadingPulse 0.8s infinite ease-in-out;
}

@keyframes loadingPulse {
    0%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    50% {
        opacity: 1;
        transform: scale(1.2);
    }
}

/* iframe样式 */
.preview-iframe {
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 8px 8px 0 0;
    background: white;
}

/* 悬停叠加层 */
.preview-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
}

.effect-card:hover .preview-overlay {
    opacity: 1;
    pointer-events: auto;
}

.overlay-btn {
    background: rgba(255, 255, 255, 0.95);
    color: var(--text-primary);
    border: none;
    padding: 12px 20px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    z-index: 10;
    position: relative;
}

.overlay-btn:hover {
    background: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    border: 2px solid var(--primary-color);
}

.overlay-btn span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* 新窗口按钮样式 */
.btn-info {
    background: linear-gradient(135deg, #38b2ac, #319795);
    color: white;
}

.btn-info:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 特效卡片悬停效果优化 */
.effect-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.effect-card:hover .preview-placeholder {
    background: linear-gradient(135deg, #f093fb, #f5576c);
}

/* 加载状态动画 */
.preview-placeholder.loading .placeholder-icon {
    animation: iconRotate 2s infinite linear;
}

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

/* 响应式优化 */
@media (max-width: 768px) {
    .effect-preview {
        height: 180px;
    }

    .placeholder-icon {
        font-size: 36px;
    }

    .overlay-btn {
        padding: 10px 16px;
        font-size: 13px;
    }
}

.effect-preview::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    opacity: 0;
    transition: var(--transition);
}

.effect-card:hover .effect-preview::after {
    opacity: 1;
}

.effect-info {
    padding: 20px;
}

.effect-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.3;
}

.effect-description {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 16px;
    line-height: 1.5;
}

.effect-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.tag {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 4px 10px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 500;
}

.effect-actions {
    display: flex;
    gap: 12px;
}

.btn {
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
}

/* 加载指示器 */
.loading-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 40px;
    color: white;
    font-size: 16px;
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.no-more-content {
    text-align: center;
    padding: 40px;
    color: white;
    font-size: 16px;
    opacity: 0.8;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    backdrop-filter: blur(5px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

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

.modal-content {
    background: white;
    border-radius: var(--border-radius);
    width: 95vw;
    height: 90vh;
    max-width: 1400px;
    max-height: 900px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: scale(0.9) translateY(20px);
        opacity: 0;
    }
    to {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0; /* 防止头部被压缩 */
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-actions {
    display: flex;
    gap: 12px;
}

.btn-close {
    background: #ef4444;
    color: white;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    padding: 0;
}

.modal-body {
    flex: 1;
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    font-weight: bold;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .effects-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 20px;
    }

    .header-content {
        flex-direction: column;
        gap: 20px;
    }

    .nav {
        flex-direction: column;
        gap: 20px;
        width: 100%;
    }

    .search-box {
        min-width: 100%;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .effects-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .stats {
        gap: 20px;
    }

    .stat-number {
        font-size: 28px;
    }

    .filter-tabs {
        justify-content: center;
    }

    .modal-content {
        width: 95vw;
        height: 85vh;
    }

    .modal-header {
        padding: 15px 20px;
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }

    .modal-actions {
        justify-content: center;
    }
}

/* 高级过滤器样式 */
.advanced-filters {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(248, 249, 255, 0.95));
    border: 2px solid transparent;
    border-radius: 16px;
    padding: 25px 30px;
    margin-bottom: 25px;
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.12);
    animation: slideDown 0.3s ease-out;
    backdrop-filter: blur(15px);
    position: relative;
    overflow: hidden;
}

.advanced-filters::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2, #f093fb, #667eea);
    background-size: 200% 100%;
    animation: gradientShift 3s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.filter-row {
    display: flex;
    gap: 25px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: flex-start;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 220px;
    flex: 1;
}

.filter-group label {
    font-weight: 600;
    color: #4a5568;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filter-group label::before {
    font-size: 16px;
}

.filter-group:nth-child(1) label::before { content: '🛠️'; }
.filter-group:nth-child(2) label::before { content: '📊'; }
.filter-group:nth-child(3) label::before { content: '⭐'; }

.filter-group select {
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 25px;
    background: linear-gradient(135deg, #ffffff, #f8f9ff);
    font-size: 14px;
    font-weight: 500;
    color: #4a5568;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(102, 126, 234, 0.1);
}

.filter-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15);
    transform: translateY(-2px);
    background: linear-gradient(135deg, #f8f9ff, #ffffff);
}

.filter-group select:hover {
    border-color: #667eea;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.15);
}

.filter-group select[multiple] {
    min-height: 120px;
    padding: 8px;
}

.filter-group select[multiple] option {
    padding: 8px 12px;
    margin: 2px 0;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.filter-group select[multiple] option:checked {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.difficulty-filters, .feature-filters {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.difficulty-btn, .feature-btn {
    padding: 8px 16px;
    border: 2px solid transparent;
    border-radius: 20px;
    background: linear-gradient(135deg, #f8f9ff, #ffffff);
    box-shadow: 0 2px 6px rgba(102, 126, 234, 0.1);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #667eea;
    position: relative;
    overflow: hidden;
}

.difficulty-btn::before, .feature-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
    transition: left 0.4s;
}

.difficulty-btn:hover, .feature-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
    border-color: #667eea;
    background: linear-gradient(135deg, #ffffff, #f8f9ff);
}

.difficulty-btn:hover::before, .feature-btn:hover::before {
    left: 100%;
}

.difficulty-btn.active, .feature-btn.active {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-color: #667eea;
    box-shadow: 0 3px 10px rgba(102, 126, 234, 0.3);
    transform: translateY(-1px);
}

.difficulty-btn.active::before, .feature-btn.active::before {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

/* 难度按钮特殊颜色 */
.difficulty-btn[data-difficulty="beginner"].active {
    background: linear-gradient(135deg, #48bb78, #38a169);
}

.difficulty-btn[data-difficulty="intermediate"].active {
    background: linear-gradient(135deg, #ed8936, #dd6b20);
}

.difficulty-btn[data-difficulty="advanced"].active {
    background: linear-gradient(135deg, #f56565, #e53e3e);
}

.difficulty-btn[data-difficulty="expert"].active {
    background: linear-gradient(135deg, #9f7aea, #805ad5);
}

/* 排序选项样式 */
.sort-options {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(248, 249, 255, 0.95));
    border: 2px solid transparent;
    border-radius: 16px;
    padding: 20px 25px;
    margin-bottom: 25px;
    animation: slideDown 0.3s ease-out;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.sort-options::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2, #f093fb);
    border-radius: 16px 16px 0 0;
}

.sort-row {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.sort-row label {
    font-weight: 600;
    color: #4a5568;
    min-width: 90px;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sort-row label::before {
    content: '📊';
    font-size: 16px;
}

.sort-row select {
    padding: 10px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 25px;
    background: linear-gradient(135deg, #ffffff, #f8f9ff);
    font-size: 14px;
    font-weight: 500;
    color: #4a5568;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.1);
    min-width: 120px;
}

.sort-row select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
    transform: translateY(-1px);
}

.sort-row select:hover {
    border-color: #667eea;
    background: linear-gradient(135deg, #f8f9ff, #ffffff);
    transform: translateY(-1px);
}

.apply-btn {
    padding: 12px 24px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 8px;
}

.apply-btn::before {
    content: '✨';
    font-size: 16px;
}

.apply-btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.apply-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    background: linear-gradient(135deg, #5a67d8, #6b46c1);
}

.apply-btn:hover::after {
    left: 100%;
}

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

/* 推荐区域样式 */
.recommended-section {
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    color: white;
}

.recommended-section h3 {
    margin: 0 0 15px 0;
    font-size: 20px;
}

.recommended-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

/* 批量操作样式 */
.bulk-actions {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(248, 249, 255, 0.95));
    border: 2px solid transparent;
    border-radius: 16px;
    padding: 20px 25px;
    margin-bottom: 25px;
    animation: slideDown 0.3s ease-out;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.bulk-actions::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #4ecdc4, #44a08d, #38b2ac);
    border-radius: 16px 16px 0 0;
}

.bulk-controls {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}

.bulk-btn {
    padding: 10px 20px;
    border: 2px solid transparent;
    border-radius: 25px;
    background: linear-gradient(135deg, #ffffff, #f8f9ff);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: #4a5568;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(76, 175, 168, 0.1);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 6px;
}

.bulk-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
    transition: left 0.4s;
}

.bulk-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(76, 175, 168, 0.2);
    border-color: #4ecdc4;
    background: linear-gradient(135deg, #f8ffff, #f0fffe);
}

.bulk-btn:hover::before {
    left: 100%;
}

.bulk-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(76, 175, 168, 0.2);
}

/* 具体按钮样式 */
#selectAllBtn::after { content: ' ☑️'; }
#clearSelectionBtn::after { content: ' 🗑️'; }
#downloadSelectedBtn::after { content: ' 📥'; }
#favoriteSelectedBtn::after { content: ' 💖'; }

.selected-count {
    color: #4ecdc4;
    font-weight: 600;
    margin-left: auto;
    padding: 8px 16px;
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(78, 205, 196, 0.1), rgba(56, 178, 172, 0.1));
    border: 1px solid rgba(78, 205, 196, 0.3);
    font-size: 14px;
}

/* 高级控制按钮 */
.advanced-controls {
    display: flex;
    gap: 12px;
    margin-left: 20px;
    align-items: center;
}

.toggle-btn {
    padding: 10px 18px;
    border: 2px solid transparent;
    border-radius: 25px;
    background: linear-gradient(135deg, #f8f9ff, #ffffff);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.1);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    color: #667eea;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    user-select: none;
}

.toggle-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
    transition: left 0.5s;
}

.toggle-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.25);
    border-color: #667eea;
    background: linear-gradient(135deg, #ffffff, #f8f9ff);
}

.toggle-btn:hover::before {
    left: 100%;
}

.toggle-btn.active {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-color: #667eea;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transform: translateY(-1px);
}

.toggle-btn.active::before {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.toggle-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
}

/* 按钮图标 */
.toggle-btn .icon {
    font-size: 16px;
    transition: transform 0.3s ease;
}

.toggle-btn:hover .icon {
    transform: scale(1.1);
}

.toggle-btn.active .icon {
    transform: rotate(180deg);
}

/* 清除搜索按钮 */
#clearSearchBtn {
    padding: 8px;
    border: none;
    background: #ff6b6b;
    color: white;
    border-radius: 4px;
    cursor: pointer;
    margin-left: 5px;
    transition: background 0.2s;
}

#clearSearchBtn:hover {
    background: #ff5252;
}

/* 增强的卡片样式 */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

.card-badges {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.difficulty-badge {
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.difficulty-badge.beginner {
    background: #48bb78;
    color: white;
}

.difficulty-badge.intermediate {
    background: #ed8936;
    color: white;
}

.difficulty-badge.advanced {
    background: #f56565;
    color: white;
}

.difficulty-badge.expert {
    background: #9f7aea;
    color: white;
}

.new-badge, .featured-badge {
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.9);
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 10px 0;
    font-size: 12px;
    color: var(--text-muted);
}

.tech-stack {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.tech-tag {
    background: #e2e8f0;
    color: #4a5568;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 500;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-size {
    color: var(--text-muted);
    font-size: 11px;
}

.responsive-icon {
    color: #48bb78;
}

.use-cases {
    margin: 8px 0;
    font-size: 12px;
    color: var(--text-muted);
}

.use-case-list {
    color: var(--text-secondary);
    font-weight: 500;
}

/* 浮动操作按钮 */
.floating-actions {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 1500;
}

.float-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.float-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

#showFavoritesBtn {
    background: linear-gradient(135deg, #ff6b6b, #ee5a52);
    color: white;
}

#toggleBulkModeBtn {
    background: linear-gradient(135deg, #4ecdc4, #44a08d);
    color: white;
}

/* 模态框增强 */
.modal-title-area {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.modal-meta {
    display: flex;
    gap: 10px;
    align-items: center;
}

.modal-info {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    max-height: 120px; /* 限制信息区域高度 */
    overflow-y: auto; /* 如果内容过多则滚动 */
    flex-shrink: 0; /* 不被压缩 */
    transition: max-height 0.3s ease;
}

.modal-info.collapsed {
    max-height: 40px; /* 折叠时的高度 */
    overflow: hidden;
}

.modal-info-toggle {
    position: absolute;
    top: 5px;
    right: 10px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-muted);
    padding: 5px;
    border-radius: 4px;
    transition: background 0.2s;
}

.modal-info-toggle:hover {
    background: var(--bg-secondary);
}

.info-section h4 {
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 14px;
}

.modal-tech-stack {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin: 8px 0;
}

.modal-use-cases {
    color: var(--text-secondary);
    font-size: 13px;
}

.browser-support {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.browser-tag {
    background: #e2e8f0;
    color: #4a5568;
    padding: 3px 6px;
    border-radius: 4px;
    font-size: 11px;
}

.preview-container {
    flex: 1;
    min-height: 400px; /* 确保最小高度 */
    display: flex;
    flex-direction: column;
    position: relative;
}

.preview-container iframe {
    width: 100%;
    height: 100%;
    border: none;
    flex: 1;
    border-radius: 8px;
}

.modal-footer {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    max-height: 120px; /* 限制相关推荐区域高度 */
    overflow-y: auto;
    flex-shrink: 0;
}

.modal-footer.collapsed {
    max-height: 0;
    padding: 0 20px;
    overflow: hidden;
}

.modal-footer-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 12px;
    color: var(--text-muted);
    padding: 5px 0;
    width: 100%;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.modal-footer-toggle:hover {
    background: var(--bg-secondary);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
}

/* 收藏夹模态框 */
.favorites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    padding: 20px;
}

/* 其他响应式优化 */
@media (max-width: 768px) {
    .contact-info-cards {
        grid-template-columns: 1fr;
        gap: 15px;
        margin: 20px 0;
        padding: 0 10px;
    }

    .contact-card {
        padding: 15px;
    }

    .qr-mini {
        /* width: 50px; */
        height: 50px;
    }

    .advanced-controls {
        margin-left: 0;
        margin-top: 10px;
    }

    .filter-row {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group {
        min-width: auto;
    }

    .modal-info {
        grid-template-columns: 1fr;
    }

    .floating-actions {
        bottom: 20px;
        right: 20px;
    }

    .float-btn {
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
}