/* ========================================
   Nanobot 教程 - 主样式文件
   设计原则：新手友好、清晰易懂、视觉舒适
   ======================================== */

/* CSS 变量定义 */
:root {
    --primary-color: #4A90E2;
    --primary-dark: #357ABD;
    --secondary-color: #6C5CE7;
    --success-color: #00B894;
    --warning-color: #FDCB6E;
    --danger-color: #E17055;
    --text-color: #2D3436;
    --text-light: #636E72;
    --bg-color: #F8F9FA;
    --bg-card: #FFFFFF;
    --border-color: #DFE6E9;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.8;
    font-size: 16px;
}

/* 进度条 */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--border-color);
    z-index: 1001;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    transition: width 0.3s ease;
}

/* 侧边栏 */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 280px;
    height: 100vh;
    background: var(--bg-card);
    border-right: 1px solid var(--border-color);
    padding: 20px;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}

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

.sidebar-header h2 {
    font-size: 1.3rem;
    color: var(--primary-color);
}

.close-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-light);
}

/* 搜索框 */
.search-box {
    position: relative;
    margin-bottom: 20px;
}

.search-box input {
    width: 100%;
    padding: 12px 40px 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-box i {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

/* 导航菜单 */
.nav-menu {
    list-style: none;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    margin-bottom: 5px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

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

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

.nav-item i {
    margin-right: 12px;
    font-size: 18px;
}

.nav-item span {
    flex: 1;
}

.check-mark {
    opacity: 0;
    color: var(--success-color);
    transition: var(--transition);
}

.nav-item.completed .check-mark {
    opacity: 1;
}

.nav-item.active .check-mark {
    color: white;
}

/* 学习进度 */
.learning-progress {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.learning-progress h3 {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 15px;
}

.progress-circle {
    position: relative;
    width: 100px;
    height: 100px;
    margin: 0 auto;
}

.progress-circle svg {
    transform: rotate(-90deg);
}

.circle-bg {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 3;
}

.circle-progress {
    fill: none;
    stroke: var(--primary-color);
    stroke-width: 3;
    stroke-linecap: round;
    transition: stroke-dasharray 0.5s ease;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 20px;
    font-weight: bold;
    color: var(--primary-color);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    font-size: 20px;
    cursor: pointer;
    z-index: 1001;
    box-shadow: var(--shadow-md);
}

/* 主内容区 */
.main-content {
    margin-left: 280px;
    padding: 40px;
    max-width: 1200px;
}

/* 章节样式 */
.section {
    display: none;
    animation: fadeIn 0.5s ease;
}

.section.active {
    display: block;
}

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

.section-header {
    margin-bottom: 30px;
}

.section-header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.section-header h1 i {
    color: var(--primary-color);
}

.breadcrumb {
    color: var(--text-light);
    font-size: 14px;
}

/* 内容卡片 */
.content-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.content-card h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.content-card h2 i {
    color: var(--primary-color);
}

.card-icon {
    font-size: 60px;
    text-align: center;
    margin-bottom: 20px;
}

.lead {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 20px;
}

/* 高亮框 */
.highlight-box {
    background: linear-gradient(135deg, #E8F4FD, #F0E6FF);
    border-left: 4px solid var(--primary-color);
    padding: 20px;
    border-radius: var(--radius-sm);
    margin: 20px 0;
}

.highlight-box h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.highlight-box ul {
    margin-left: 20px;
}

.highlight-box li {
    margin-bottom: 8px;
}

/* 价值网格 */
.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.value-item {
    text-align: center;
    padding: 20px;
    border-radius: var(--radius-md);
    background: var(--bg-color);
    transition: var(--transition);
}

.value-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.value-icon {
    font-size: 40px;
    margin-bottom: 10px;
}

.value-item h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.value-item p {
    color: var(--text-light);
    font-size: 14px;
}

/* 受众列表 */
.audience-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.audience-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: var(--bg-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.audience-item:hover {
    background: linear-gradient(135deg, #E8F4FD, #F0E6FF);
}

.audience-icon {
    font-size: 40px;
}

.audience-content h3 {
    margin-bottom: 5px;
}

.audience-content p {
    color: var(--text-light);
    font-size: 14px;
}

/* 功能手风琴 */
.feature-accordion {
    margin-top: 20px;
}

.accordion-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    overflow: hidden;
}

.accordion-header {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    cursor: pointer;
    background: var(--bg-color);
    transition: var(--transition);
}

.accordion-header:hover {
    background: #E8F4FD;
}

.feature-icon {
    font-size: 24px;
    margin-right: 15px;
}

.feature-title {
    flex: 1;
    font-weight: 600;
}

.accordion-header i {
    transition: transform 0.3s ease;
}

.accordion-item.active .accordion-header i {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 20px;
}

.accordion-item.active .accordion-content {
    max-height: 1000px;
    padding: 20px;
}

/* 工具网格 */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.tool-item {
    padding: 15px;
    background: var(--bg-color);
    border-radius: var(--radius-sm);
    text-align: center;
}

.tool-item strong {
    display: block;
    margin-bottom: 5px;
}

.tool-item p {
    font-size: 13px;
    color: var(--text-light);
}

/* 渠道列表 */
.channel-list {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 15px;
}

.channel-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 15px 25px;
    background: var(--bg-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.channel-item:hover {
    transform: scale(1.05);
}

.channel-item img {
    width: 40px;
    height: 40px;
}

.channel-item span {
    font-size: 14px;
}

/* 记忆流程图 */
.memory-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.memory-step {
    text-align: center;
    padding: 15px;
    background: var(--bg-color);
    border-radius: var(--radius-md);
    min-width: 100px;
}

.step-icon {
    font-size: 30px;
    margin-bottom: 5px;
}

.step-text {
    font-size: 13px;
    color: var(--text-light);
}

.arrow {
    font-size: 24px;
    color: var(--primary-color);
}

/* 定时类型 */
.schedule-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.schedule-type {
    padding: 20px;
    background: var(--bg-color);
    border-radius: var(--radius-md);
}

.schedule-type h4 {
    margin-bottom: 10px;
}

.schedule-type p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 10px;
}

.schedule-type code {
    display: block;
    padding: 8px;
    background: #2D3436;
    color: #00B894;
    border-radius: var(--radius-sm);
    font-size: 12px;
}

/* 架构图 */
.architecture-diagram {
    padding: 30px;
    background: var(--bg-color);
    border-radius: var(--radius-md);
    margin-top: 20px;
}

.arch-layer {
    margin-bottom: 10px;
}

.layer-title {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 10px;
    text-align: center;
}

.arch-components {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.arch-component {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 15px 25px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    min-width: 100px;
    transition: var(--transition);
}

.arch-component:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.arch-component i {
    font-size: 24px;
    color: var(--primary-color);
}

.arch-component span {
    font-size: 13px;
}

.highlight-layer .arch-component {
    background: linear-gradient(135deg, #E8F4FD, #F0E6FF);
    border-color: var(--primary-color);
}

.arch-arrow {
    text-align: center;
    padding: 10px;
    font-size: 20px;
    color: var(--text-light);
}

/* 流程图 */
.flow-diagram {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-top: 20px;
}

.flow-step {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: var(--bg-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.flow-step:hover {
    background: linear-gradient(135deg, #E8F4FD, #F0E6FF);
    transform: translateX(10px);
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 18px;
}

.step-content h4 {
    margin-bottom: 5px;
}

.step-content p {
    color: var(--text-light);
    font-size: 14px;
}

.flow-connector {
    width: 2px;
    height: 20px;
    background: var(--border-color);
    margin-left: 39px;
}

/* 模块关系图 */
.module-relationship {
    text-align: center;
    padding: 30px;
}

.module-node {
    display: inline-block;
    padding: 20px 30px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    margin: 10px;
    transition: var(--transition);
}

.module-node:hover {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.main-node {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
}

.node-icon {
    font-size: 30px;
    margin-bottom: 8px;
}

.node-title {
    font-weight: 600;
    margin-bottom: 5px;
}

.node-desc {
    font-size: 13px;
    opacity: 0.8;
}

.module-connections {
    margin-top: 20px;
}

.sub-modules {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

/* 文件夹树 */
.folder-tree {
    font-family: 'Courier New', monospace;
}

.folder-item {
    margin-left: 20px;
}

.folder-item.root {
    margin-left: 0;
}

.folder-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.folder-header:hover {
    background: var(--bg-color);
}

.folder-header i {
    color: #FDCB6E;
}

.folder-desc {
    margin-left: auto;
    color: var(--text-light);
    font-size: 13px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.folder-children {
    display: none;
    margin-left: 20px;
    border-left: 2px solid var(--border-color);
    padding-left: 10px;
}

.folder-item.expanded > .folder-children {
    display: block;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.file-item:hover {
    background: linear-gradient(135deg, #E8F4FD, #F0E6FF);
    transform: translateX(5px);
}

.file-item:active {
    transform: translateX(3px);
}

.file-item i {
    color: var(--primary-color);
    font-size: 14px;
}

.file-item .file-arrow {
    margin-left: auto;
    color: var(--text-light);
    font-size: 12px;
    opacity: 0;
    transition: var(--transition);
}

.file-item:hover .file-arrow {
    opacity: 1;
    color: var(--primary-color);
}

.file-desc {
    color: var(--text-light);
    font-size: 13px;
}

/* 代码块 */
.code-block {
    margin-top: 20px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background: #2D3436;
    color: white;
}

.file-name {
    font-size: 14px;
    color: #DFE6E9;
}

.copy-btn {
    background: transparent;
    border: 1px solid #636E72;
    color: #DFE6E9;
    padding: 5px 15px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.copy-btn:hover {
    background: #636E72;
}

.code-block pre {
    margin: 0;
    padding: 20px;
    background: #2D3436;
    overflow-x: auto;
}

.code-block code {
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
}

/* 代码解释 */
.code-explanation {
    margin-top: 20px;
    padding: 20px;
    background: linear-gradient(135deg, #E8F4FD, #F0E6FF);
    border-radius: var(--radius-md);
}

.code-explanation h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.explanation-steps {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.exp-step {
    display: flex;
    gap: 15px;
    padding: 15px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
}

.exp-num {
    width: 30px;
    height: 30px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

.exp-content strong {
    display: block;
    margin-bottom: 5px;
}

.exp-content p {
    color: var(--text-light);
    font-size: 14px;
}

/* 安装步骤 */
.install-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.install-step {
    display: flex;
    gap: 20px;
    padding: 25px;
    background: var(--bg-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.install-step:hover {
    background: linear-gradient(135deg, #E8F4FD, #F0E6FF);
}

.install-step .step-number {
    flex-shrink: 0;
}

.install-step h3 {
    margin-bottom: 10px;
}

.install-step p {
    color: var(--text-light);
    margin-bottom: 10px;
}

.code-inline {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background: #2D3436;
    border-radius: var(--radius-sm);
}

.code-inline code {
    color: #00B894;
    font-family: 'Fira Code', monospace;
}

.copy-btn-small {
    background: transparent;
    border: none;
    color: #DFE6E9;
    cursor: pointer;
    padding: 5px;
}

.config-example {
    margin-top: 15px;
}

.config-example pre {
    padding: 15px;
    background: #2D3436;
    border-radius: var(--radius-sm);
    overflow-x: auto;
}

/* 学习路径 */
.learning-path {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.path-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: var(--bg-color);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--border-color);
    transition: var(--transition);
}

.path-item.completed {
    border-left-color: var(--success-color);
    background: linear-gradient(90deg, rgba(0, 184, 148, 0.1), transparent);
}

.path-item.active {
    border-left-color: var(--primary-color);
    background: linear-gradient(90deg, rgba(74, 144, 226, 0.1), transparent);
}

.path-icon {
    font-size: 24px;
}

.path-content h4 {
    margin-bottom: 5px;
}

.path-content p {
    color: var(--text-light);
    font-size: 14px;
}

/* FAQ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    cursor: pointer;
    background: var(--bg-color);
    transition: var(--transition);
}

.faq-question:hover {
    background: #E8F4FD;
}

.faq-question span {
    font-weight: 600;
}

.faq-question i {
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p, .faq-answer ul, .faq-answer ol {
    padding: 15px 20px;
}

.faq-answer ul, .faq-answer ol {
    margin-left: 40px;
}

/* 导航按钮 */
.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 25px;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

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

.btn-secondary {
    background: var(--bg-color);
    color: var(--text-color);
    border: 2px solid var(--border-color);
}

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

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

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

.btn-disabled {
    background: var(--border-color);
    color: var(--text-light);
    cursor: not-allowed;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    padding: 40px;
    border-radius: var(--radius-lg);
    text-align: center;
    max-width: 500px;
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

.modal-content h2 {
    margin-bottom: 15px;
}

.modal-content p {
    color: var(--text-light);
    margin-bottom: 10px;
}

.modal-content ul {
    text-align: left;
    margin: 20px 0 30px 30px;
}

.modal-content li {
    margin-bottom: 8px;
}

/* 返回顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .close-btn {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
        padding: 80px 20px 20px;
    }
    
    .arch-components {
        flex-direction: column;
        align-items: center;
    }
    
    .memory-diagram {
        flex-direction: column;
    }
    
    .arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 768px) {
    .value-grid {
        grid-template-columns: 1fr;
    }
    
    .tool-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .schedule-types {
        grid-template-columns: 1fr;
    }
    
    .flow-step {
        flex-direction: column;
        text-align: center;
    }
    
    .navigation-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ==================== 源码查看模态框样式 ==================== */

/* 源码链接按钮 */
.source-code-link {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px dashed var(--border-color);
}

.btn-code {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-code:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-code i {
    font-size: 16px;
}

/* 源码模态框 */
.source-code-modal {
    z-index: 2000;
}

.source-code-modal .modal-content {
    max-width: 900px;
    max-height: 90vh;
    padding: 0;
    overflow: hidden;
}

.source-code-content {
    display: flex;
    flex-direction: column;
    height: 90vh;
}

/* 源码模态框头部 */
.source-code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.source-code-header h2 {
    margin: 0;
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.close-modal-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-modal-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

/* 源码模态框主体 */
.source-code-body {
    flex: 1;
    overflow-y: auto;
    padding: 25px;
}

/* 源码信息 */
.source-code-info {
    margin-bottom: 20px;
}

.source-code-info .info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background: #f0f4ff;
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
}

.source-code-info .info-item i {
    color: var(--primary-color);
}

.source-code-info .info-item span {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 14px;
    color: var(--text-color);
}

.source-code-desc {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
    margin: 0;
}

/* 源码标签页 */
.source-code-tabs {
    margin-bottom: 20px;
}

.tabs-header {
    display: flex;
    gap: 5px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 15px;
    overflow-x: auto;
}

.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    transition: var(--transition);
    white-space: nowrap;
}

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

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* 代码区块 */
.code-section {
    margin-bottom: 20px;
}

.code-explanation {
    background: #fff9e6;
    border-left: 4px solid var(--warning-color);
    padding: 15px 20px;
    margin-bottom: 15px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.code-explanation p {
    margin: 0;
    color: var(--text-color);
    font-size: 14px;
    line-height: 1.7;
}

.code-block {
    background: #2d2d2d;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background: #3d3d3d;
    border-bottom: 1px solid #4d4d4d;
}

.code-lang {
    color: #aaa;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
}

.copy-btn {
    background: #4d4d4d;
    border: none;
    color: #aaa;
    padding: 5px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 5px;
}

.copy-btn:hover {
    background: #5d5d5d;
    color: white;
}

.code-block pre {
    margin: 0;
    padding: 20px;
    overflow-x: auto;
}

.code-block code {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 13px;
    line-height: 1.6;
}

/* 相关文件 */
.source-code-related {
    background: #f8f9fa;
    padding: 15px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.source-code-related h4 {
    margin: 0 0 12px 0;
    font-size: 14px;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.source-code-related h4 i {
    color: var(--primary-color);
}

.related-files {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.related-file {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-color);
}

.related-file i {
    color: var(--primary-color);
    font-size: 12px;
}

/* 学习提示 */
.source-code-tips {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    padding: 15px 20px;
    border-radius: var(--radius-md);
}

.source-code-tips h4 {
    margin: 0 0 12px 0;
    font-size: 14px;
    color: #2e7d32;
    display: flex;
    align-items: center;
    gap: 8px;
}

.source-code-tips h4 i {
    color: #4caf50;
}

.source-code-tips ul {
    margin: 0;
    padding-left: 20px;
}

.source-code-tips li {
    color: #1b5e20;
    font-size: 13px;
    line-height: 1.8;
}

/* 源码模态框底部 */
.source-code-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 15px 25px;
    background: #f8f9fa;
    border-top: 1px solid var(--border-color);
}

.source-code-footer .btn {
    padding: 10px 20px;
}

/* ==================== 方法介绍页面样式 ==================== */

/* 方法金字塔结构 */
.method-pyramid {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    padding: 40px 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
    border-radius: var(--radius-lg);
    margin: 30px 0;
}

.pyramid-level {
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
}

.pyramid-level:hover {
    transform: translateY(-5px) scale(1.02);
    filter: drop-shadow(0 8px 12px rgba(0,0,0,0.15));
}

.pyramid-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 30px;
    color: white;
    text-align: center;
    clip-path: polygon(10% 0%, 90% 0%, 100% 100%, 0% 100%);
    min-width: 300px;
}

.level-1 .pyramid-content {
    background: linear-gradient(135deg, #FF6B6B 0%, #EE5A5A 100%);
    min-width: 250px;
}

.level-2 .pyramid-content {
    background: linear-gradient(135deg, #4ECDC4 0%, #44A08D 100%);
    min-width: 400px;
}

.level-3 .pyramid-content {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-width: 550px;
}

.level-4 .pyramid-content {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    min-width: 700px;
}

.pyramid-content i {
    font-size: 28px;
    margin-bottom: 8px;
}

.level-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 5px;
}

.level-desc {
    font-size: 13px;
    opacity: 0.9;
    margin-bottom: 10px;
}

.level-methods {
    font-size: 12px;
    opacity: 0.8;
    font-family: 'Fira Code', monospace;
    background: rgba(255,255,255,0.2);
    padding: 5px 15px;
    border-radius: 20px;
}

.pyramid-legend {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-light);
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: 4px;
}

/* 知识图谱容器 */
.knowledge-graph-container {
    background: #f8f9fa;
    border-radius: var(--radius-lg);
    padding: 30px;
    margin: 30px 0;
}

.knowledge-graph {
    width: 100%;
    height: 500px;
    position: relative;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.graph-legend {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.graph-legend .legend-title {
    font-weight: 600;
    color: var(--text-color);
    margin-right: 10px;
}

.graph-legend .legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.legend-line {
    width: 30px;
    height: 3px;
    border-radius: 2px;
}

.legend-line.calls {
    background: #4A90E2;
}

.legend-line.uses {
    background: #F5A623;
}

.legend-line.related {
    background: #7ED321;
}

/* 方法关系模式卡片 */
.relationship-patterns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 25px;
}

.pattern-card {
    display: flex;
    gap: 15px;
    padding: 20px;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.pattern-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.pattern-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    flex-shrink: 0;
}

.pattern-content h3 {
    margin: 0 0 8px 0;
    font-size: 16px;
    color: var(--text-color);
}

.pattern-content p {
    margin: 0 0 10px 0;
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.5;
}

.pattern-example {
    font-family: 'Fira Code', monospace;
    font-size: 12px;
    color: var(--primary-color);
    background: #f0f4ff;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary-color);
}

/* 方法过滤器 */
.method-filters {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    color: var(--text-color);
}

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

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

/* 方法列表 */
.methods-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.method-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.method-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.method-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
    opacity: 0;
    transition: var(--transition);
}

.method-card:hover::before {
    opacity: 1;
}

.method-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

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

.method-name {
    font-family: 'Fira Code', monospace;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color);
}

.method-category {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.method-category.entry {
    background: #ffe0e0;
    color: #d32f2f;
}

.method-category.core {
    background: #e0f7fa;
    color: #00838f;
}

.method-category.manage {
    background: #e8eaf6;
    color: #3949ab;
}

.method-category.basic {
    background: #f3e5f5;
    color: #7b1fa2;
}

.method-signature {
    font-family: 'Fira Code', monospace;
    font-size: 13px;
    color: var(--text-light);
    background: #f5f5f5;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
}

.method-description {
    font-size: 14px;
    color: var(--text-color);
    line-height: 1.6;
    margin-bottom: 15px;
}

.method-meta {
    display: flex;
    gap: 20px;
    font-size: 12px;
    color: var(--text-light);
}

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

.method-arrow {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    opacity: 0;
    transition: var(--transition);
}

.method-card:hover .method-arrow {
    opacity: 1;
    color: var(--primary-color);
}

/* 方法详情模态框 */
.method-modal .modal-content {
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
}

.method-detail {
    padding: 10px;
}

.method-detail-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #764ba2 100%);
    color: white;
    padding: 25px;
    border-radius: var(--radius-md);
    margin-bottom: 25px;
}

.method-detail-header h3 {
    margin: 0 0 10px 0;
    font-size: 24px;
    font-family: 'Fira Code', monospace;
}

.method-detail-header .signature {
    font-family: 'Fira Code', monospace;
    font-size: 14px;
    opacity: 0.9;
    background: rgba(255,255,255,0.2);
    padding: 8px 15px;
    border-radius: var(--radius-sm);
    display: inline-block;
}

.socratic-section {
    margin-bottom: 25px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
}

.socratic-section h4 {
    margin: 0 0 15px 0;
    color: var(--text-color);
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.socratic-section h4 i {
    color: var(--primary-color);
}

.socratic-question {
    font-size: 15px;
    color: var(--text-color);
    font-weight: 600;
    margin-bottom: 15px;
    padding: 12px 15px;
    background: white;
    border-radius: var(--radius-sm);
    border: 1px dashed var(--primary-color);
}

.socratic-answer {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-light);
}

.socratic-answer p {
    margin: 0 0 10px 0;
}

.socratic-answer ul {
    margin: 10px 0;
    padding-left: 25px;
}

.socratic-answer li {
    margin-bottom: 8px;
}

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

.relation-item {
    background: white;
    padding: 15px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.relation-item h5 {
    margin: 0 0 10px 0;
    font-size: 13px;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.relation-item h5 i {
    color: var(--primary-color);
}

.relation-item p, .relation-item ul {
    margin: 0;
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

.method-analogy {
    background: linear-gradient(135deg, #fff9e6 0%, #fff3cd 100%);
    padding: 20px;
    border-radius: var(--radius-md);
    margin: 20px 0;
    border-left: 4px solid #ffc107;
}

.method-analogy h4 {
    margin: 0 0 10px 0;
    color: #856404;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.method-analogy p {
    margin: 0;
    color: #856404;
    font-size: 14px;
    line-height: 1.7;
}

.method-code-example {
    margin: 20px 0;
}

.method-code-example h4 {
    margin: 0 0 10px 0;
    font-size: 15px;
    color: var(--text-color);
}

.method-tips {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    padding: 20px;
    border-radius: var(--radius-md);
    margin-top: 20px;
}

.method-tips h4 {
    margin: 0 0 12px 0;
    color: #2e7d32;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.method-tips ul {
    margin: 0;
    padding-left: 20px;
}

.method-tips li {
    color: #1b5e20;
    font-size: 13px;
    line-height: 1.8;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .pyramid-content {
        min-width: 200px !important;
        padding: 15px 20px;
    }
    
    .level-name {
        font-size: 14px;
    }
    
    .level-methods {
        font-size: 10px;
    }
    
    .knowledge-graph {
        height: 300px;
    }
    
    .relationship-patterns {
        grid-template-columns: 1fr;
    }
    
    .method-filters {
        justify-content: center;
    }
    
    .filter-btn {
        padding: 8px 15px;
        font-size: 13px;
    }
}

/* 打印样式 */
@media print {
    .sidebar, .menu-toggle, .back-to-top, .progress-bar {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .section {
        display: block !important;
        page-break-after: always;
    }
    
    .content-card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}