/* ==========================================================================
   1. CSS 变量和基础样式
   ========================================================================== */
:root {
    /* 主色调 */
    --color-primary: #8B5CF6;
    --color-primary-hover: #7C3AED;
    --halo-color: rgba(59, 130, 246, 0.25);

    /* 亮色主题 - 护眼优化 */
    --bg-default: #e1e1d87c;
    --bg-secondary: #e1e1d87c;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --border-color: #D3D3D3;
    --border-dashed-color: #C0C0C0;

    /* 表格变量 */
    --table-header-bg: #005f73;
    --table-header-text: #ffffff;
    --table-row-even-bg: #f8f9fa;
    --table-row-hover-bg: #e9ecef;
    --subtle-text-color: #6c757d;

    /* 下载列表变量 */
    --download-item-bg: #f1f3f5;
    --download-item-border: #e9ecef;

    /* 代码块变量 */
    --code-bg-color: #e9ecef;
    --code-text-color: #212529;
    --code-block-bg: #f8f9fa;
    --code-block-text: #212529;
    --code-block-border: #dee2e6;
    --highlight-bg-color: #ffe066;
    --highlight-text-color: #333;
    --strong-color: #d9534f;
    
    /* 复制按钮变量 */
    --copy-btn-bg: #ffffff;
    --copy-btn-text: #495057;
    --copy-btn-border: #dee2e6;
    --copy-btn-hover-bg: #f8f9fa;
    --copy-btn-success-bg: #28a745;
    --copy-btn-success-text: #ffffff;
    --copy-btn-success-border: #1e7e34;

    /* 提示/警告/提示框变量 */
    --note-bg-color: #e7f3fe;
    --note-border-color: #2196f3;
    --note-text-color: #1d6aab;
    --warning-bg-color: #fff3e0;
    --warning-border-color: #ff9800;
    --warning-text-color: #c77700;
    --tip-bg-color: #e6f7f4;
    --tip-border-color: #20c997;

    /* 字体 */
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --theme-transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-default);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    padding-top: 4rem;
}

@media (max-width: 768px) {
    body {
        padding-top: 3.5rem;
    }
}

/* 容器样式 */
.container {
    width: 100%;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

/* ==========================================================================
   2. 通用组件样式
   ========================================================================== */

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid transparent;
    transition: all 0.2s;
}

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

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

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

.btn-secondary:hover {
    background-color: color-mix(in srgb, var(--bg-secondary) 80%, black);
    border-color: color-mix(in srgb, var(--border-color) 80%, black);
}

/* 链接样式 */
.content-section a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

.content-section a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

/* 内容区域标题样式 */
.content-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.content-section h2 {
    font-size: 1.875rem;
    font-weight: 600;
    margin: 2.5rem 0 1rem 0;
    color: var(--text-primary);
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 0.5rem;
}

.content-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 2rem 0 1rem 0;
    color: var(--text-primary);
}

.content-section h4 {
    font-size: 1.25rem;
    font-weight: 500;
    margin: 1.5rem 0 0.75rem 0;
    color: var(--text-primary);
}

.content-section p {
    margin-bottom: 1rem;
    line-height: 1.7;
    text-align: left;
}

.content-section ul, .content-section ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.content-section li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* 代码块样式 */
pre {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
    margin: 1rem 0;
    overflow-x: auto;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

code {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    padding: 0.2rem 0.4rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    color: var(--color-primary);
}

pre code {
    background: none;
    border: none;
    padding: 0;
    color: var(--text-primary);
}

/* 特殊块样式 */
.note {
    background-color: rgba(59, 130, 246, 0.1);
    border-left: 4px solid #3B82F6;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 0.25rem;
}

.note strong {
    color: #3B82F6;
}

.warning {
    background-color: rgba(239, 68, 68, 0.1);
    border-left: 4px solid #EF4444;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 0.25rem;
}

.warning strong {
    color: #EF4444;
}

div.highlight {
    background-color: rgba(139, 92, 246, 0.1);
    border: 2px solid var(--color-primary);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

div.highlight h3 {
    color: var(--color-primary);
    margin-top: 0;
    border-bottom: none;
}

span.highlight {
    background-color: rgba(139, 92, 246, 0.15);
    color: var(--color-primary);
    padding: 0.1em 0.4em;
    border-radius: 0.3em;
    font-weight: 500;
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.95rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    border-radius: 0.5rem;
    overflow: hidden;
}

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

thead th {
    background-color: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
}

tbody tr:last-child td {
    border-bottom: none;
}

tbody tr:nth-child(even) {
    background-color: var(--bg-secondary);
}

/* 移动设备表格响应式样式 */
@media (max-width: 768px) {
    table {
        display: block;
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 1rem 0;
        font-size: 0.9rem;
    }
    
    th, td {
        padding: 0.5rem 0.75rem;
        white-space: nowrap;
        min-width: 80px;
    }
    
    thead th {
        font-size: 0.85rem;
    }
}

/* 响应式表格容器 */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    margin: 1.5rem 0;
    -webkit-overflow-scrolling: touch;
}

.table-responsive table {
    margin: 0;
}

/* 居中对齐表格 */
.centered-table th,
.centered-table td {
    text-align: center;
}

.centered-table th:first-child,
.centered-table td:first-child {
    text-align: left;
}

/* 图片样式 */
img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1.5rem auto;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    transition: var(--theme-transition);
}

.content-section img {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: 0.5rem;
    margin: 1rem 0;
    border: 1px solid var(--border-color);
}

/* 工具类 */
.meta-info {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.download-links {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.download-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.download-links li {
    margin-bottom: 0.75rem;
}

.download-links li:last-child {
    margin-bottom: 0;
}

.code-block {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
    margin: 1rem 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    white-space: pre-wrap;
    word-break: break-all;
}

.tip-box {
    background-color: rgba(250, 204, 21, 0.1);
    border-left: 4px solid #FBBF24;
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 0.25rem;
}

.tip-box strong {
    color: #FBBF24;
}

/* ==========================================================================
   3. 首页特定样式
   ========================================================================== */

/* Hero 区域 */
.hero {
    padding: 4rem 0;
    text-align: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr;
    align-items: center;
    gap: 4rem;
}

@media (min-width: 768px) {
    .hero {
        text-align: left;
    }
    .hero-container {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-headline {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

@media (min-width: 1024px) {
    .hero-headline {
        font-size: 3.5rem;
    }
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

@media (min-width: 768px) {
    .hero-buttons {
        justify-content: flex-start;
    }
}

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

.hero-logo-image {
    max-width: 320px;
    width: 100%;
    height: auto;
    border-radius: 50%;
    background-color: color-mix(in srgb, var(--bg-default) 50%, transparent);
    box-shadow: 0 0 80px 20px var(--halo-color);
    transition: box-shadow 0.3s ease-in-out, transform 0.6s ease-in-out;
}

.hero-logo-image:hover {
    transform: rotate(360deg);
}

/* 功能区域 */
.features {
    padding: 4rem 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    display: block;
    background-color: var(--bg-default);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.05);
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   4. 下载中心特定样式
   ========================================================================== */

/* 下载页面 Hero 区域 */
.downloads-hero {
    position: relative;
    padding: 80px 0;
    overflow: hidden;
    text-align: center;
}

.downloads-hero::before {
    content: '';
    position: absolute;
    top: -10%;
    right: -20%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.2), rgba(168, 85, 247, 0.2), transparent 70%);
    filter: blur(120px);
    z-index: -1;
    transform: translateZ(0);
}

.downloads-hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.downloads-hero-headline {
    font-size: clamp(2.2rem, 6vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
    background-image: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.downloads-hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

/* 搜索框 */
.search-container {
    position: relative;
    max-width: 400px;
    margin: 0 auto;
}

.search-input {
    width: 100%;
    padding: 12px 48px 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background-color: var(--bg-default);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.search-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
}

/* 下载区域 */
.downloads-section {
    padding: 60px 0;
    background-color: var(--bg-secondary);
    transition: background-color 0.3s ease;
}

/* 分类过滤器 */
.category-filter {
    display: flex;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: 8px 20px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-default);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: pointer;
}

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

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

/* 下载网格 */
.downloads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

/* 下载卡片 */
.download-card {
    background-color: var(--bg-default);
    padding: 16px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 4px -1px rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.03);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border-color: var(--color-primary);
}

/* 当下拉菜单打开时，提升整个卡片的z-index */
.download-card:has(.dropdown-menu.show) {
    z-index: 11;
}

.download-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.download-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    font-weight: bold;
}

.download-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.download-description {
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.5;
    font-size: 0.9rem;
}

.download-meta {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.meta-item svg {
    width: 16px;
    height: 16px;
}

.download-actions {
    display: flex;
    gap: 8px;
    align-items: stretch;
}

.download-btn {
    flex: 1;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
    transition: all 0.2s ease;
    cursor: pointer;
    line-height: 1;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: color-mix(in srgb, var(--bg-secondary) 80%, black);
}

/* 分类标签 */
.category-tag {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: 8px;
}

.tag-mtk {
    background-color: rgba(59, 130, 246, 0.1);
    color: #3B82F6;
}

.tag-qualcomm {
    background-color: rgba(16, 185, 129, 0.1);
    color: #10B981;
}

.tag-system {
    background-color: rgba(245, 158, 11, 0.1);
    color: #F59E0B;
}

.tag-utility {
    background-color: rgba(139, 92, 246, 0.1);
    color: #8B5CF6;
}

/* ==========================================================================
   5. 教程文档特定样式
   ========================================================================== */

/* 作者信息 */
.author-info, .meta-info {
    text-align: center;
    color: var(--subtle-text-color);
    margin-bottom: 2rem;
    font-size: 0.9em;
    transition: var(--theme-transition);
}

/* 文档标题样式 */
.content-section h1 {
    text-align: center;
    font-size: 2.2em;
    margin-top: 0;
    margin-bottom: 1rem;
}

.content-section h2 {
    margin-top: 3rem;
    padding-bottom: 0.8rem;
    border-bottom: 2px solid var(--border-color);
    font-size: 1.8em;
}

.content-section h3 {
    font-size: 1.4em;
    margin-top: 2em;
    margin-bottom: 1em;
}

/* 文档代码块 */
.code-block {
    background-color: var(--code-block-bg);
    color: var(--code-block-text);
    padding: 15px 20px;
    border-radius: 8px;
    margin: 20px 0;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    white-space: pre-wrap;
    word-break: break-all;
    font-size: 0.95em;
    transition: var(--theme-transition);
    position: relative;
}

/* 代码块复制按钮 */
.copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background-color: var(--copy-btn-bg);
    color: var(--copy-btn-text);
    border: 1px solid var(--copy-btn-border);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 0.8em;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s, background-color 0.2s;
    font-family: var(--font-sans);
}

.copy-btn:hover {
    opacity: 1;
    background-color: var(--copy-btn-hover-bg);
}

.copy-btn.copied {
    background-color: var(--copy-btn-success-bg);
    color: var(--copy-btn-success-text);
    border-color: var(--copy-btn-success-border);
}

/* 提示框样式 */
.note, .warning, .tip-box {
    padding: 1.25rem;
    margin: 1.5rem 0;
    border-radius: 8px;
    border-left: 5px solid;
    transition: var(--theme-transition);
}

.note p:last-child, .warning p:last-child, .tip-box p:last-child {
    margin-bottom: 0;
}

.note {
    background-color: var(--note-bg-color);
    border-color: var(--note-border-color);
    color: var(--note-text-color);
}

.warning {
    background-color: var(--warning-bg-color);
    border-color: var(--warning-border-color);
    color: var(--warning-text-color);
}

.tip-box {
    background-color: var(--tip-bg-color);
    border-color: var(--tip-border-color);
}

.note strong, .warning strong, .tip-box strong {
    color: inherit;
    font-weight: 600;
}

strong {
    color: var(--strong-color);
    font-weight: bold;
}

/* 文件名解析器 */
.filename-explainer {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-top: 1.5rem;
    padding: 1.5rem 2rem;
    background: linear-gradient(145deg, var(--bg-secondary), var(--bg-default));
    transition: var(--theme-transition);
}

.filename-explainer h3 {
    margin-top: 0;
    color: var(--text-primary);
    text-align: center;
    border-bottom: none;
}

.filename-explainer pre {
    background-color: var(--code-bg-color);
    padding: 1rem;
    border-radius: 5px;
    margin: 1rem 0;
    text-align: center;
    font-size: 1.1em;
    word-break: break-all;
    white-space: pre-wrap;
    border: 1px solid var(--border-color);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

.filename-explainer ul {
    list-style: none;
    padding: 0;
}

.filename-explainer li {
    padding: 0.75rem 0;
    border-bottom: 1px dashed var(--border-dashed-color);
}

.filename-explainer li:last-child {
    border-bottom: none;
}

.part-b, .part-v, .part-N, .part-vndklite {
    font-weight: 700;
}

.part-b { color: #2a9d8f; }
.part-v { color: #e76f51; }
.part-N { color: #f4a261; }
.part-vndklite { color: #264653; }

.center {
    text-align: center;
    margin-top: 2rem;
    font-size: 0.9em;
    opacity: 0.8;
}

/* ==========================================================================
   6. 页脚样式
   ========================================================================== */

.main-footer {
    padding: 2rem 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   7. 动画和工具类
   ========================================================================== */

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

.download-card {
    animation: fadeIn 0.6s ease-out;
}

.download-card:nth-child(odd) {
    animation-delay: 0.1s;
}

.download-card:nth-child(even) {
    animation-delay: 0.2s;
}

.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.no-results svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    color: var(--border-color);
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* ==========================================================================
   8. 响应式设计
   ========================================================================== */

@media (max-width: 1024px) {
    .downloads-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 24px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero-headline {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .downloads-grid {
        grid-template-columns: 1fr;
    }
    
    .category-filter {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 8px;
    }
    
    .download-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .download-card {
        padding: 20px;
    }
    
    .download-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .download-meta {
        flex-direction: column;
        gap: 8px;
    }
}

/* ==========================================================================
   9. 下拉菜单样式
   ========================================================================== */

.dropdown {
    position: relative;
    display: inline-block;
    flex: 1;
}

.dropdown:has(.dropdown-toggle[aria-expanded="true"]) {
    z-index: 10;
}

.dropdown-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    line-height: 1;
}

.dropdown-menu {
    display: none;
    position: absolute;
    background-color: var(--bg-default);
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 9999;
    border-radius: 8px;
    overflow: hidden;
    padding: 8px 0;
    top: 100%;
    left: 0;
    margin-top: 8px;
    border: 1px solid var(--border-color);
    list-style: none;
    margin-left: 0;
    padding-left: 0;
}

.dropdown-menu.show {
    display: block;
}

.dropdown-item {
    color: var(--text-primary);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
    white-space: nowrap;
}

.dropdown-item:hover {
    background-color: var(--bg-secondary);
}

.dropdown-arrow {
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid white;
    transition: transform 0.2s ease;
    vertical-align: middle;
    margin-left: 4px;
}

.dropdown-toggle[aria-expanded="true"] .dropdown-arrow {
    transform: rotate(180deg);
}

/* ==========================================================================
   10. 夜间模式样式
   ========================================================================== */

html[data-theme='dark'] {
    --bg-default: #111827;
    --bg-secondary: #1F2937;
    --text-primary: #F9FAFB;
    --text-secondary: #9CA3AF;
    --border-color: #374151;
    --halo-color: rgba(96, 165, 250, 0.3);

    --color-link: #90cdf4;

    /* 表格变量 */
    --table-header-bg: #003440;
    --table-header-text: #e0e0e0;
    --table-row-even-bg: #222b38;
    --table-row-hover-bg: #384557;
    --subtle-text-color: #a0aec0;

    /* 下载列表变量 */
    --download-item-bg: #4a5568;
    --download-item-border: #718096;

    /* 代码块变量 */
    --code-bg-color: #4a5568;
    --code-text-color: #f8f9fa;
    --code-block-bg: #2d3748;
    --code-block-text: #e2e8f0;
    --code-block-border: #4a5568;
    --highlight-bg-color: #b8860b;
    --highlight-text-color: #f0f0f0;
    --strong-color: #ff8a80;
    
    /* 复制按钮变量 */
    --copy-btn-bg: #4a5568;
    --copy-btn-text: #e2e8f0;
    --copy-btn-border: #718096;
    --copy-btn-hover-bg: #2d3748;
    --copy-btn-success-bg: #38a169;
    --copy-btn-success-text: #ffffff;
    --copy-btn-success-border: #2f855a;

    /* 提示/警告/提示框变量 */
    --note-bg-color: #2c5282;
    --note-border-color: #63b3ed;
    --note-text-color: #e2e8f0;
    --warning-bg-color: #543a24;
    --warning-border-color: #ffb74d;
    --warning-text-color: #ffcc80;
    --tip-bg-color: #2c5b4c;
    --tip-border-color: #48bb78;
}

html[data-theme='dark'] .btn-secondary:hover {
    background-color: #4b5563;
}

html[data-theme='dark'] .feature-card {
    box-shadow: none;
}

html[data-theme='dark'] .feature-card:hover {
    border-color: var(--color-primary);
}

html[data-theme='dark'] .github-icon[src*="github-fill.svg"] {
    display: none;
}

html[data-theme='dark'] .github-icon[src*="whitegithub.svg"] {
    display: block;
}

html[data-theme='dark'] .theme-toggle .moon-icon {
    display: none;
}

html[data-theme='dark'] .theme-toggle .sun-icon {
    display: block;
}

/* ==========================================================================
   11. 音乐源特定样式
   ========================================================================== */

/* 音乐源容器 */
.music-sources {
    margin: 2rem 0;
}

.music-sources h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    border-bottom: 3px solid var(--color-primary);
    padding-bottom: 0.5rem;
}

.music-sources h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 2.5rem 0 1rem 0;
    color: var(--text-primary);
    border-left: 4px solid var(--color-primary);
    padding-left: 1rem;
}

.music-sources h4 {
    font-size: 1.25rem;
    font-weight: 500;
    margin: 1.5rem 0 0.5rem 0;
    color: var(--text-primary);
}

/* 音乐源链接区域 */
.source-links {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin: 1rem 0;
}

.source-links h4 {
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
}

.source-links h4:first-child {
    margin-top: 0;
}

.source-links code {
    display: block;
    background-color: var(--code-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    margin: 0.5rem 0 1rem 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    color: var(--code-text-color);
    word-break: break-all;
    white-space: pre-wrap;
    transition: all 0.2s ease;
    cursor: pointer;
    position: relative;
}

.source-links code:hover {
    background-color: color-mix(in srgb, var(--code-bg-color) 90%, black);
    border-color: var(--color-primary);
}

.source-links code:active {
    transform: scale(0.98);
}

/* 引用块样式 */
.music-sources blockquote {
    background-color: var(--note-bg-color);
    border-left: 4px solid var(--note-border-color);
    padding: 1.25rem;
    margin: 1.5rem 0;
    border-radius: 0.5rem;
    color: var(--note-text-color);
}

.music-sources blockquote p {
    margin-bottom: 0;
    font-style: italic;
}

/* 音乐源列表样式 */
.music-sources ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

.music-sources li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.music-sources li a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

.music-sources li a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .music-sources h2 {
        font-size: 1.75rem;
    }
    
    .music-sources h3 {
        font-size: 1.35rem;
    }
    
    .music-sources h4 {
        font-size: 1.15rem;
    }
    
    .source-links {
        padding: 1rem;
    }
    
    .source-links code {
        font-size: 0.85rem;
        padding: 0.6rem 0.8rem;
    }
}

@media (max-width: 480px) {
    .music-sources h2 {
        font-size: 1.5rem;
    }
    
    .music-sources h3 {
        font-size: 1.25rem;
    }
    
    .source-links code {
        font-size: 0.8rem;
        padding: 0.5rem 0.7rem;
    }
}

/* ==========================================================================
   12. 分类过滤和卡片标签样式
   ========================================================================== */

/* 分类过滤器样式 */
.category-filter {
    display: flex;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
    justify-content: center;
    padding: 0 1rem;
}

.filter-btn {
    padding: 8px 20px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-default);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: pointer;
    white-space: nowrap;
}

.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.filter-btn.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(139, 92, 246, 0.3);
}

/* 卡片标签样式 */
.card-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: 12px;
    background-color: rgba(139, 92, 246, 0.1);
    color: var(--color-primary);
    border: 1px solid rgba(139, 92, 246, 0.2);
    transition: all 0.2s ease;
}

.feature-card:hover .card-tag {
    background-color: rgba(139, 92, 246, 0.2);
    border-color: rgba(139, 92, 246, 0.4);
    transform: scale(1.05);
}

/* 卡片过渡动画 */
.feature-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease, opacity 0.3s ease;
}

.feature-card[style*="display: none"] {
    display: none !important;
}

.feature-card[style*="display: block"] {
    animation: fadeInUp 0.4s ease-out;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .category-filter {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 8px;
        margin-bottom: 30px;
    }
    
    .filter-btn {
        padding: 6px 16px;
        font-size: 0.9rem;
    }
    
    .card-tag {
        font-size: 0.7rem;
        padding: 3px 10px;
    }
}

@media (max-width: 480px) {
    .category-filter {
        gap: 8px;
    }
    
    .filter-btn {
        padding: 5px 12px;
        font-size: 0.85rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}