/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部 */
.header {
    background: var(--card-bg);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
    flex-wrap: wrap;
    gap: 15px;
}

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

.logo-icon {
    font-size: 2rem;
}

.logo h1 {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.search-box {
    flex: 1;
    max-width: 400px;
    display: flex;
    gap: 8px;
}

.search-box input {
    flex: 1;
    padding: 10px 16px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

.search-box input:focus {
    border-color: var(--primary);
}

.search-box button {
    padding: 10px 20px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s;
}

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

.nav {
    display: flex;
    gap: 8px;
}

.nav-btn {
    padding: 8px 16px;
    border: 2px solid var(--border);
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.3s;
}

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

.nav-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* 分类筛选 */
.categories {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 15px 0;
}

.category-list {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 5px;
}

.category-btn {
    padding: 6px 16px;
    border: 1px solid var(--border);
    background: transparent;
    border-radius: 20px;
    cursor: pointer;
    white-space: nowrap;
    font-size: 0.9rem;
    transition: all 0.3s;
}

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

.category-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* 统计信息 */
.stats {
    padding: 20px 0;
    color: var(--text-light);
    font-size: 0.95rem;
}

.stats span:first-child {
    margin-right: 15px;
}

/* 内容网格 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding-bottom: 40px;
}

/* 卡片样式 */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.card-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
}

.card-category {
    font-size: 0.8rem;
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
}

.card-desc {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 15px;
}

.tag {
    padding: 4px 10px;
    background: var(--bg);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--text-light);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.card-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
}

.card-link:hover {
    text-decoration: underline;
}

.copy-btn {
    padding: 6px 12px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background 0.3s;
}

.copy-btn:hover {
    background: var(--primary-dark);
}

.copy-btn.copied {
    background: #10b981;
}

/* 加载更多 */
.load-more {
    text-align: center;
    padding: 20px 0 40px;
}

#loadMoreBtn {
    padding: 12px 40px;
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
}

#loadMoreBtn:hover {
    background: var(--primary);
    color: white;
}

/* 回到顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s;
    z-index: 50;
}

.back-to-top.show {
    display: flex;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* 页脚 */
.footer {
    background: var(--card-bg);
    padding: 30px 0;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
}

.footer-info {
    flex: 1;
}

.footer p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.footer-links a {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.85rem;
}

.footer-links a:hover {
    text-decoration: underline;
}

.footer-qrcode {
    text-align: center;
    flex-shrink: 0;
}

.qrcode-img {
    width: 120px;
    height: 120px;
    border-radius: 8px;
    border: 2px solid var(--border);
    object-fit: cover;
}

.qrcode-text {
    color: var(--text-light);
    font-size: 0.8rem;
    margin-top: 8px;
    margin-bottom: 0;
}

/* 弹窗 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 200;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    text-align: center;
}

.modal-content h2 {
    margin-bottom: 15px;
    color: var(--text);
}

.modal-content p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
}

.submit-btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: background 0.3s;
}

.submit-btn:hover {
    background: var(--primary-dark);
}

/* 响应式 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: stretch;
    }

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

    .nav {
        justify-content: center;
    }

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

    /* 手机端卡片样式调整 */
    .card {
        padding: 15px;
    }

    .card-footer {
        flex-direction: column;
        gap: 10px;
        align-items: stretch;
    }

    .card-footer .card-link {
        font-size: 0.85rem;
    }

    .card-actions {
        width: 100%;
    }

    .preview-btn,
    .card-footer .copy-btn {
        padding: 10px 16px;
        font-size: 0.9rem;
    }

    /* 手机端弹窗样式 */
    .preview-modal-content {
        max-width: 95%;
        padding: 20px;
        margin: 10px;
    }

    .preview-modal-content h2 {
        font-size: 1.3rem;
    }

    .preview-prompt-box {
        padding: 15px;
    }

    .preview-prompt-box pre {
        font-size: 0.85rem;
    }

    /* 手机端页脚样式 */
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }

    .footer-links {
        justify-content: center;
    }

    .qrcode-img {
        width: 100px;
        height: 100px;
    }
}

/* 预览按钮样式 */
.card-actions {
    display: flex;
    gap: 10px;
    width: 100%;
}

.preview-btn {
    flex: 1;
    padding: 8px 16px;
    background: white;
    color: var(--primary);
    border: 1px solid var(--primary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
    text-align: center;
    font-weight: 500;
}

.preview-btn:hover {
    background: var(--primary);
    color: white;
}

/* 复制按钮样式调整 */
.card-footer .copy-btn {
    flex: 1;
    padding: 8px 16px;
    font-size: 0.9rem;
    text-align: center;
    font-weight: 500;
}

/* 预览弹窗样式 */
.preview-modal-content {
    max-width: 700px;
    text-align: left;
    max-height: 80vh;
    overflow-y: auto;
}

.preview-modal-content h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    padding-right: 30px;
}

.preview-category {
    display: inline-block;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.preview-desc {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.preview-prompt-box {
    background: #1e293b;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    overflow-x: auto;
}

.preview-prompt-box pre {
    color: #e2e8f0;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
    margin: 0;
}

.preview-usecase {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 20px;
    padding: 12px;
    background: var(--bg);
    border-radius: 6px;
}

.preview-usecase strong {
    color: var(--text);
}

.preview-actions {
    text-align: center;
    padding-top: 15px;
    border-top: 1px solid var(--border);
}

.preview-copy-btn {
    padding: 10px 24px;
    font-size: 0.95rem;
}