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

:root {
    /* 亮色主题变量 */
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --error-color: #ef4444;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    
    --transition: all 0.3s ease;
}

/* 暗色主题 */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    
    --border-color: #334155;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: var(--transition);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 1px;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.theme-toggle:hover {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

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

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

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

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

/* 主页横幅 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.api-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    max-width: 300px;
}

.api-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.api-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.api-card span {
    font-weight: 500;
    color: var(--text-primary);
}

/* 章节样式 */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* API分类 */
.api-section {
    padding: 80px 0;
    background-color: var(--bg-secondary);
}

.api-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.category-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.category-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.category-icon i {
    font-size: 1.5rem;
    color: white;
}

.category-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.category-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.category-apis {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.api-tag {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

/* 演示区域 */
.demo-section {
    padding: 80px 0;
    background-color: var(--bg-primary);
}

.demo-container {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 2rem;
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.demo-sidebar {
    background-color: var(--bg-secondary);
    padding: 2rem;
}

.demo-sidebar h3 {
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.api-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.api-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
}

.api-item:hover,
.api-item.active {
    background-color: var(--primary-color);
    color: white;
}

.demo-main {
    padding: 2rem;
}

.demo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.demo-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

.demo-controls {
    display: flex;
    gap: 1rem;
}

.api-info {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.info-item:last-child {
    border-bottom: none;
}

.info-item label {
    font-weight: 500;
    color: var(--text-secondary);
}

.info-item code {
    background-color: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.875rem;
}

.api-result {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 1.5rem;
}

.api-result h4 {
    margin-bottom: 1rem;
    font-weight: 600;
}

.result-content {
    min-height: 200px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 1rem;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.875rem;
    white-space: pre-wrap;
    overflow-x: auto;
}

.placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    gap: 0.5rem;
}

/* 关于我们 */
.about-section {
    padding: 80px 0;
    background-color: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    margin-top: 2rem;
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stat-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.stat-card h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.stat-card p {
    color: var(--text-secondary);
}

/* 页脚 */
.footer {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--primary-color);
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .api-categories {
        grid-template-columns: 1fr;
    }
    
    .demo-container {
        grid-template-columns: 1fr;
    }
    
    .demo-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .nav-menu {
        gap: 1rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.5rem;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .api-section,
    .demo-section,
    .about-section {
        padding: 60px 0;
    }
    
    .category-card,
    
    /* 结果显示样式 */
    .json-result,
    .json-image-result,
    .image-result {
        background-color: var(--bg-card);
        border-radius: var(--radius-lg);
        padding: 1.5rem;
        box-shadow: var(--shadow-md);
        border: 1px solid var(--border-color);
    }
    
    .json-data {
        margin-bottom: 1.5rem;
    }
    
    .json-data h4,
    .image-preview h4 {
        font-size: 1rem;
        font-weight: 600;
        margin-bottom: 0.75rem;
        color: var(--text-primary);
    }
    
    .json-data pre {
        background-color: var(--bg-tertiary);
        border-radius: var(--radius-sm);
        padding: 1rem;
        font-family: 'Monaco', 'Menlo', monospace;
        font-size: 0.875rem;
        white-space: pre-wrap;
        overflow-x: auto;
        border: 1px solid var(--border-color);
    }
    
    .image-preview {
        margin-bottom: 1.5rem;
    }
    
    .image-preview img {
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        margin-bottom: 0.5rem;
    }
    
    .image-info {
        font-size: 0.875rem;
        color: var(--text-secondary);
        margin: 0.5rem 0;
    }
    
    .result-actions {
        display: flex;
        gap: 0.75rem;
        justify-content: flex-end;
        margin-top: 1rem;
        padding-top: 1rem;
        border-top: 1px solid var(--border-color);
    }
    
    .result-actions .btn {
        font-size: 0.875rem;
        padding: 0.5rem 1rem;
    }
    
    .loading {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.75rem;
        color: var(--text-secondary);
        font-size: 1rem;
    }
    
    .loading i {
        animation: spin 1s linear infinite;
    }
    
    @keyframes spin {
        from { transform: rotate(0deg); }
        to { transform: rotate(360deg); }
    }
    
    .error {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.75rem;
        color: var(--error-color);
        font-size: 1rem;
        padding: 1rem;
        background-color: rgba(239, 68, 68, 0.1);
        border-radius: var(--radius-md);
        border: 1px solid rgba(239, 68, 68, 0.2);
    }
    .demo-sidebar,
    
    /* 回到顶部按钮 */
    .back-to-top {
        position: fixed;
        bottom: 2rem;
        right: 2rem;
        width: 50px;
        height: 50px;
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        border: none;
        border-radius: 50%;
        color: white;
        font-size: 1.2rem;
        cursor: pointer;
        opacity: 0;
        visibility: hidden;
        transform: translateY(20px);
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        z-index: 1000;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .back-to-top.show {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .back-to-top:hover {
        background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
        transform: translateY(-3px);
        box-shadow: 0 6px 25px rgba(0, 0, 0, 0.2);
    }
    
    .back-to-top:active {
        transform: translateY(-1px);
    }
    
    .back-to-top i {
        transition: transform 0.2s ease;
    }
    
    .back-to-top:hover i {
        transform: translateY(-2px);
    }
    .demo-main {
        padding: 1.5rem;
    }
}