/* ============================================
   现代化产品文档中心样式
   ============================================ */

/* 基础变量和重置 */
:root {
    --primary-color: #2563eb;
    --primary-hover-color: #1d4ed8;
    --primary-color-rgb: 37, 99, 235;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #06b6d4;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --bg-color: #f8fafc;
    --bg-secondary-color: #f1f5f9;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --max-width: 1600px;
    --container-padding: 1rem;
}

.dark-mode {
    --primary-color: #60a5fa;
    --primary-hover-color: #3b82f6;
    --text-color: #f1f5f9;
    --text-muted: #94a3b8;
    --text-light: #64748b;
    --bg-color: #0f172a;
    --bg-secondary-color: #1e293b;
    --card-bg: #1e293b;
    --border-color: #334155;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
}

.docs-center {
    min-height: 100vh;
}

/* ============================================
   Hero 区域
   ============================================ */
.docs-hero {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    padding: var(--spacing-2xl) 0;
    position: relative;
    overflow: hidden;
}

.docs-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 2.75rem;
    font-weight: 700;
    margin: 0 0 var(--spacing-lg) 0;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.hero-title i {
    margin-right: var(--spacing-md);
    font-size: 2.25rem;
}

.hero-subtitle {
    font-size: 1.375rem;
    opacity: 0.95;
    margin: 0;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.5;
}

.hero-search {
    max-width: 750px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    background: white;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    transition: var(--transition);
}

.search-input-wrapper:focus-within {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.search-icon {
    position: absolute;
    left: var(--spacing-xl);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.25rem;
    z-index: 10;
}

.hero-search-input {
    flex: 1;
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-lg) 4rem;
    border: none;
    font-size: 1.125rem;
    color: var(--text-color);
    outline: none;
    transition: var(--transition);
}

.hero-search-input::placeholder {
    color: var(--text-light);
}

.hero-search-input:focus {
    background: #f8fafc;
}

.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--border-color);
    margin-top: 0.25rem;
    display: none;
    z-index: 100;
    max-height: 300px;
    overflow-y: auto;
}

.search-suggestions.show {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.suggestion-item {
    padding: var(--spacing-md) var(--spacing-xl);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
}

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

.suggestion-item:hover {
    background: var(--bg-secondary-color);
    padding-left: calc(var(--spacing-xl) + 0.5rem);
}

.hero-search-btn {
    padding: var(--spacing-lg) var(--spacing-2xl);
    background: var(--primary-color);
    color: white;
    border: none;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    white-space: nowrap;
}

.hero-search-btn:hover {
    background: var(--primary-hover-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.search-tags {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
    justify-content: center;
}

.search-tag-label {
    font-size: 0.875rem;
    opacity: 0.9;
    font-weight: 500;
}

.search-tag {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.15);
    border-radius: 9999px;
    font-size: 0.875rem;
    color: white;
    text-decoration: none;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.search-tag:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   容器和布局
   ============================================ */
.docs-container {
    display: grid;
    grid-template-columns: 280px 1fr 240px;
    gap: var(--spacing-xl);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--container-padding);
}

/* 主内容区间距优化 */
.docs-main {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

/* ============================================
   侧边栏导航
   ============================================ */
.docs-sidebar {
    position: sticky;
    top: var(--spacing-lg);
    height: fit-content;
    max-height: calc(100vh - 3rem);
    overflow-y: auto;
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.docs-sidebar:hover {
    box-shadow: var(--shadow-lg);
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-color);
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.sidebar-close:hover {
    background: var(--bg-secondary-color);
    color: var(--text-color);
}

.docs-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nav-section {
    display: flex;
    flex-direction: column;
}

.nav-section-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-md);
    background: none;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-color);
    transition: var(--transition);
    text-align: left;
}

.nav-section-toggle:hover {
    background: var(--bg-secondary-color);
    transform: translateX(4px);
}

.nav-section-toggle i:first-child {
    margin-right: var(--spacing-md);
    color: var(--primary-color);
    font-size: 1.125rem;
}

.toggle-icon {
    transition: transform 0.3s ease;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.nav-section-toggle.active .toggle-icon {
    transform: rotate(180deg);
    color: var(--primary-color);
}

.nav-section-items {
    list-style: none;
    margin: 0;
    padding: 0 0 0 2.5rem;
    display: none;
    animation: slideDown 0.3s ease;
}

.nav-section-items.show {
    display: block;
}

.nav-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-muted);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    transition: var(--transition);
    margin: 0.125rem 0;
    position: relative;
}

.docs-nav .nav-item:hover {
    color: var(--text-color);
    background: var(--bg-secondary-color);
    transform: translateX(4px);
}

.docs-nav .nav-item.active {
    color: var(--primary-color);
    background: rgba(var(--primary-color-rgb), 0.1);
    font-weight: 600;
    transform: translateX(4px);
}

.docs-nav .nav-item.active::before {
    content: '';
    position: absolute;
    left: -1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 0 2px 2px 0;
}

/* ============================================
   主内容区
   ============================================ */
.docs-main {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.mobile-menu-btn {
    display: none;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-color);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

/* 工具栏 */
.docs-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.docs-toolbar:hover {
    box-shadow: var(--shadow-md);
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.docs-breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

.docs-breadcrumb a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius);
}

.docs-breadcrumb a:hover {
    color: var(--primary-color);
    background: var(--bg-secondary-color);
}

.breadcrumb-separator {
    color: var(--text-light);
    margin: 0 0.25rem;
}

.breadcrumb-current {
    color: var(--text-color);
    font-weight: 500;
    padding: 0.25rem 0.5rem;
    background: var(--bg-secondary-color);
    border-radius: var(--border-radius);
}

.version-selector {
    display: flex;
    align-items: center;
}

.version-select {
    padding: var(--spacing-sm) var(--spacing-2xl) var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-color);
    font-size: 0.875rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-md) center;
    background-size: 1rem;
    transition: var(--transition);
}

.version-select:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.1);
}

.toolbar-btn {
    width: 2.75rem;
    height: 2.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.toolbar-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.toolbar-btn::after {
    content: attr(title);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    margin-bottom: 0.5rem;
    z-index: 1000;
}

.toolbar-btn:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-4px);
}

/* ============================================
   章节标题
   ============================================ */
.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 0 var(--spacing-xl) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-color);
    padding-bottom: var(--spacing-md);
    border-bottom: 3px solid var(--primary-color);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
}

.section-title i {
    color: var(--primary-color);
    font-size: 1.5rem;
    background: rgba(var(--primary-color-rgb), 0.1);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
}

/* ============================================
   热门文档
   ============================================ */
.popular-docs {
    margin-bottom: var(--spacing-2xl);
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.doc-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-decoration: none;
    display: flex;
    gap: var(--spacing-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.doc-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.doc-card.featured {
    background: linear-gradient(135deg, rgba(var(--primary-color-rgb), 0.05), var(--card-bg));
    border-color: var(--primary-color);
    box-shadow: 0 4px 20px rgba(var(--primary-color-rgb), 0.1);
}

.doc-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    transform: rotate(3deg);
    box-shadow: var(--shadow-md);
}

.doc-icon {
    flex-shrink: 0;
    width: 4rem;
    height: 4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover-color));
    border-radius: var(--border-radius-lg);
    color: white;
    font-size: 1.75rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.doc-card:hover .doc-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.doc-content {
    flex: 1;
    min-width: 0;
}

.doc-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-color);
    line-height: 1.4;
}

.doc-content p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0 0 var(--spacing-lg) 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}

.doc-meta {
    display: flex;
    gap: var(--spacing-lg);
    font-size: 0.8125rem;
    color: var(--text-light);
    flex-wrap: wrap;
}

.doc-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-secondary-color);
    padding: 0.125rem 0.5rem;
    border-radius: var(--border-radius);
}

.doc-meta span i {
    font-size: 0.75rem;
}

/* ============================================
   Tab导航
   ============================================ */
.docs-tabs {
    margin-bottom: var(--spacing-2xl);
}

.tabs-nav {
    display: flex;
    gap: var(--spacing-sm);
    background: var(--card-bg);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.tabs-nav .tab-btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-xl);
    background: none;
    border: none;
    border-radius: var(--border-radius);
    color: var(--text-muted);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.tabs-nav .tab-btn:hover {
    color: var(--text-color);
    background: var(--bg-secondary-color);
    transform: translateY(-2px);
}

.tabs-nav .tab-btn.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.tabs-nav .tab-btn i {
    font-size: 1.125rem;
}

/* 注释掉这些样式，以避免与Bootstrap标签页冲突 */
/*
.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}
*/

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   内容区块
   ============================================ */
.content-section {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.content-section:hover {
    box-shadow: var(--shadow-md);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.section-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-color);
}

.section-header h2 i {
    color: var(--primary-color);
    background: rgba(var(--primary-color-rgb), 0.1);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: 1.5rem;
}

.filter-group {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.filter-select {
    padding: var(--spacing-sm) var(--spacing-2xl) var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-color);
    font-size: 0.875rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-md) center;
    background-size: 1rem;
    transition: var(--transition);
}

.filter-select:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.1);
}

/* ============================================
   下载列表
   ============================================ */
.downloads-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.download-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: var(--bg-secondary-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.download-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
    transform: scaleY(0);
    transition: var(--transition);
}

.download-item:hover {
    border-color: var(--primary-color);
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.download-item:hover::before {
    transform: scaleY(1);
}

.download-icon {
    flex-shrink: 0;
    width: 3.5rem;
    height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    font-size: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    margin-top: 0.25rem;
}

.download-item:hover .download-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.download-icon .fa-file-pdf {
    color: #ef4444;
}

.download-icon .fa-file-word {
    color: #3b82f6;
}

.download-icon .fa-file-excel {
    color: #10b981;
}

.download-icon .fa-file-powerpoint {
    color: #f59e0b;
}

.download-icon .fa-file-archive {
    color: #06b6d4;
}

.download-icon .fa-file-alt {
    color: var(--text-muted);
}

.download-info {
    flex: 1;
    min-width: 0;
}

.download-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-color);
    line-height: 1.4;
}

.download-meta {
    display: flex;
    gap: var(--spacing-lg);
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.download-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--card-bg);
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.download-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0 0 var(--spacing-md) 0;
    line-height: 1.5;
}

.download-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-shrink: 0;
    align-items: center;
}

/* ============================================
   筛选表单样式
   ============================================ */
.filter-form {
    width: 100%;
}

.filter-row {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.filter-btn {
    white-space: nowrap;
}

/* ============================================
   搜索结果和分类信息样式
   ============================================ */
.search-results-info,
.category-info {
    background-color: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
}

.search-results-info h3,
.category-info h3 {
    margin: 0 0 10px 0;
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

.search-results-info p,
.category-info p {
    margin: 0;
    font-size: 14px;
    color: #666;
}

/* ============================================
   下载卡片网格样式
   ============================================ */
.downloads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

/* ============================================
   下载卡片样式
   ============================================ */
.download-card {
    background-color: #fff;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.download-card:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.download-card-header {
    display: flex;
    align-items: center;
    padding: 15px;
    background-color: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
}

.download-card-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #e3f2fd;
    color: #1976d2;
    border-radius: 50%;
    margin-right: 15px;
    font-size: 20px;
}

.download-card-title {
    flex: 1;
}

.download-card-title h4 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    color: #333;
    line-height: 1.3;
}

.download-card-body {
    padding: 15px;
}

.download-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 10px;
    font-size: 12px;
    color: #666;
}

.download-card-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.download-card-desc {
    margin: 10px 0 0 0;
    font-size: 14px;
    line-height: 1.4;
    color: #555;
}

.download-card-footer {
    padding: 15px;
    background-color: #f8f9fa;
    border-top: 1px solid #e9ecef;
    text-align: right;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
}

/* ============================================
   空状态样式
   ============================================ */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    background-color: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    margin-top: 20px;
}

.empty-state i {
    font-size: 48px;
    color: #ccc;
    margin-bottom: 20px;
}

.empty-state h3 {
    margin: 0 0 10px 0;
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

.empty-state p {
    margin: 0 0 30px 0;
    font-size: 14px;
    color: #666;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   文档卡片网格
   ============================================ */
.docs-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--spacing-xl);
}

.docs-card-grid .doc-card {
    flex-direction: column;
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition);
}

.docs-card-grid .doc-card:hover {
    transform: translateY(-8px);
}

.docs-card-grid .doc-card-icon {
    width: 100%;
    height: 6rem;
    margin-bottom: var(--spacing-lg);
    font-size: 2rem;
}

.docs-card-grid .doc-card-content {
    text-align: center;
}

.docs-card-grid .doc-card-content h4 {
    margin: 0 0 var(--spacing-md) 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-color);
}

.docs-card-grid .doc-card-meta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    font-size: 0.8125rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.docs-card-grid .doc-card-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-secondary-color);
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius);
}

.docs-card-grid .doc-card-actions {
    display: flex;
    gap: var(--spacing-md);
}

.docs-card-grid .doc-card-actions .btn {
    flex: 1;
    transition: var(--transition);
}

.docs-card-grid .doc-card-actions .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   支持卡片
   ============================================ */
.support-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.support-card-large {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.support-card-large:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.support-card-large.full-width {
    grid-column: 1 / -1;
}

.support-card-header {
    padding: var(--spacing-xl);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.support-card-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.support-card-header.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover-color));
}

.support-card-header.bg-gradient-success {
    background: linear-gradient(135deg, #10b981, #059669);
}

.support-card-header.bg-gradient-info {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
}

.support-card-header.bg-gradient-warning {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.support-card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.support-card-header h3 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.support-card-body {
    padding: var(--spacing-xl);
}

.support-info-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) 0;
}

.support-info-row:not(:last-child) {
    border-bottom: 1px solid var(--border-color);
}

.support-info-icon {
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary-color);
    border-radius: var(--border-radius-lg);
    color: var(--primary-color);
    font-size: 1.25rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.support-info-row:hover .support-info-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.support-info-text {
    flex: 1;
}

.support-info-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 0.125rem;
}

.support-info-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
}

.support-card-btn {
    width: 100%;
    margin-top: var(--spacing-xl);
    transition: var(--transition);
}

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

/* 聊天选项 */
.chat-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.chat-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-secondary-color);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    color: var(--text-color);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.chat-option:hover {
    background: rgba(var(--primary-color-rgb), 0.1);
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.chat-option i {
    font-size: 1.75rem;
    width: 3rem;
    text-align: center;
    transition: var(--transition);
}

.chat-option:hover i {
    transform: scale(1.2);
}

.chat-option span {
    font-weight: 500;
    font-size: 1rem;
}

/* 时间线 */
.process-timeline {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 1.5rem;
    left: 15%;
    right: 15%;
    height: 2px;
    background: var(--border-color);
    z-index: 0;
}

.timeline-item {
    text-align: center;
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.timeline-item:hover {
    transform: translateY(-4px);
}

.timeline-number {
    width: 3.5rem;
    height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover-color));
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-lg) auto;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    z-index: 2;
}

.timeline-item:hover .timeline-number {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.timeline-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-color);
}

.timeline-content p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

/* 报价计划 */
.pricing-plans {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.pricing-plan {
    background: var(--bg-secondary-color);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl) var(--spacing-xl);
    text-align: center;
    position: relative;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.pricing-plan:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.pricing-plan.featured {
    border-color: var(--primary-color);
    background: linear-gradient(180deg, rgba(var(--primary-color-rgb), 0.05), var(--bg-secondary-color));
    box-shadow: 0 4px 20px rgba(var(--primary-color-rgb), 0.1);
}

.plan-badge {
    position: absolute;
    top: -0.75rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-lg);
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.plan-header h4 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-lg) 0;
    color: var(--text-color);
}

.plan-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.125rem;
    margin-bottom: var(--spacing-2xl);
}

.plan-price .currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-muted);
}

.plan-price .amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-color);
}

.plan-price .period {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.plan-features {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--spacing-2xl) 0;
    text-align: left;
}

.plan-features li {
    padding: var(--spacing-md) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.plan-features li:hover {
    color: var(--primary-color);
    transform: translateX(4px);
}

.plan-features li:last-child {
    border-bottom: none;
}

.plan-features li i {
    color: var(--success-color);
    font-size: 1rem;
    flex-shrink: 0;
}

.plan-btn {
    width: 100%;
    transition: var(--transition);
}

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

/* ============================================
   用户反馈
   ============================================ */
.feedback-section {
    margin-bottom: var(--spacing-2xl);
}

.feedback-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.feedback-card:hover {
    box-shadow: var(--shadow-md);
}

.feedback-header {
    margin-bottom: var(--spacing-xl);
}

.feedback-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-lg) 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    color: var(--text-color);
}

.feedback-header h3 i {
    color: var(--primary-color);
    background: rgba(var(--primary-color-rgb), 0.1);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
}

.feedback-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.feedback-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--bg-secondary-color);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    color: var(--text-color);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.feedback-btn.positive.selected {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.feedback-btn.negative.selected {
    background: var(--danger-color);
    border-color: var(--danger-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.feedback-form {
    margin-top: var(--spacing-xl);
    animation: fadeIn 0.5s ease;
}

.feedback-textarea {
    width: 100%;
    min-height: 150px;
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-color);
    background: var(--bg-secondary-color);
    resize: vertical;
    margin-bottom: var(--spacing-lg);
    transition: var(--transition);
}

.feedback-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.1);
}

.feedback-submit {
    padding: var(--spacing-md) var(--spacing-2xl);
    transition: var(--transition);
}

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

/* ============================================
   相关资源
   ============================================ */
.related-resources {
    margin-bottom: var(--spacing-2xl);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.resource-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    color: var(--text-color);
    transition: var(--transition);
    position: relative;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.resource-card::before {
    content: '';
    position: absolute;
    right: -50px;
    top: -50px;
    width: 100px;
    height: 100px;
    background: rgba(var(--primary-color-rgb), 0.05);
    border-radius: 50%;
    transition: var(--transition);
}

.resource-card:hover {
    border-color: var(--primary-color);
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.resource-card:hover::before {
    transform: scale(4);
}

.resource-icon {
    flex-shrink: 0;
    width: 4rem;
    height: 4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover-color));
    border-radius: var(--border-radius-lg);
    color: white;
    font-size: 1.75rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.resource-card:hover .resource-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.resource-content {
    flex: 1;
    min-width: 0;
    position: relative;
    z-index: 1;
}

.resource-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-color);
    line-height: 1.4;
}

.resource-content p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

.resource-arrow {
    color: var(--text-muted);
    transition: var(--transition);
    position: relative;
    z-index: 1;
    font-size: 1.25rem;
}

.resource-card:hover .resource-arrow {
    color: var(--primary-color);
    transform: translateX(8px);
}

/* ============================================
   右侧目录
   ============================================ */
.docs-toc {
    position: sticky;
    top: var(--spacing-lg);
    height: fit-content;
    max-height: calc(100vh - 3rem);
    overflow-y: auto;
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.docs-toc:hover {
    box-shadow: var(--shadow-lg);
}

.toc-header {
    padding: 0 0 var(--spacing-lg) 0;
    margin-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.toc-header h4 {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.toc-header h4 i {
    color: var(--primary-color);
    background: rgba(var(--primary-color-rgb), 0.1);
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
}

.toc-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.toc-link:hover {
    color: var(--primary-color);
    background: rgba(var(--primary-color-rgb), 0.1);
    transform: translateX(4px);
}

.toc-link.active {
    color: var(--primary-color);
    background: rgba(var(--primary-color-rgb), 0.1);
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.toc-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-color);
    border-radius: 3px;
}

/* ============================================
   返回顶部
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 1000;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-hover-color);
    transform: translateY(-4px);
}

/* ============================================
   按钮样式
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

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

.btn-outline {
    background: transparent;
    color: var(--text-color);
    border-color: var(--border-color);
}

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

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-block {
    width: 100%;
}

/* ============================================
   空状态
   ============================================ */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.empty-state h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 0.75rem 0;
    color: var(--text-color);
}

.empty-state p {
    font-size: 1rem;
    color: var(--text-muted);
    margin: 0 0 2rem 0;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1280px) {
    .docs-container {
        grid-template-columns: 260px 1fr;
    }
    
    .docs-toc {
        display: none;
    }
}

@media (max-width: 1024px) {
    .docs-container {
        grid-template-columns: 1fr;
    }
    
    .docs-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 280px;
        height: 100vh;
        max-height: 100vh;
        z-index: 1000;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        border-radius: 0;
    }
    
    .docs-sidebar.show {
        transform: translateX(0);
    }
    
    .sidebar-close {
        display: block;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .support-grid {
        grid-template-columns: 1fr;
    }
    
    .process-timeline {
        grid-template-columns: 1fr;
    }
    
    .pricing-plans {
        grid-template-columns: 1fr;
    }
    
    .resources-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .docs-hero {
        padding: 3rem 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .search-input-wrapper {
        flex-direction: column;
    }
    
    .hero-search-input {
        padding: 1rem 1rem 1rem 3rem;
    }
    
    .hero-search-btn {
        width: 100%;
        justify-content: center;
    }
    
    .search-tags {
        justify-content: flex-start;
    }
    
    .tabs-nav {
        flex-direction: column;
    }
    
    .tabs-nav .tab-btn {
        justify-content: center;
    }
    
    .docs-toolbar {
        flex-direction: column;
        gap: 1rem;
    }
    
    .toolbar-left,
    .toolbar-right {
        width: 100%;
        justify-content: space-between;
    }
    
    .docs-grid {
        grid-template-columns: 1fr;
    }
    
    .download-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .download-actions {
        width: 100%;
    }
    
    .download-actions .btn {
        flex: 1;
    }
    
    .docs-card-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .filter-group {
        width: 100%;
    }
    
    .filter-select {
        flex: 1;
    }
    
    .feedback-buttons {
        flex-direction: column;
    }
    
    .feedback-btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .docs-container {
        padding: 1rem;
    }
    
    .content-section {
        padding: 1.25rem;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
}

/* ============================================
   打印样式
   ============================================ */
@media print {
    .docs-sidebar,
    .docs-toc,
    .mobile-menu-btn,
    .docs-toolbar,
    .docs-tabs,
    .feedback-section,
    .related-resources,
    .back-to-top {
        display: none !important;
    }
    
    .docs-container {
        grid-template-columns: 1fr;
    }
    
    .docs-main {
        width: 100%;
    }
}