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

:root {
    --primary-color: #2496ed;
    --secondary-color: #0db7ed;
    --dark-color: #0b1828;
    --light-color: #ffffff;
    --gray-light: #f5f5f5;
    --gray-medium: #e0e0e0;
    --gray-dark: #666666;
    --success-color: #28a745;
    --border-radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* 导航栏 */
.navbar {
    background: var(--dark-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--light-color);
    font-size: 1.5rem;
    font-weight: bold;
}

.logo {
    font-size: 2rem;
}

.brand-name {
    color: var(--light-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    color: var(--light-color);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, var(--dark-color) 0%, #1a3a5c 100%);
    color: var(--light-color);
    padding: 100px 0;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: rgba(255, 255, 255, 0.9);
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.docker-animation {
    position: relative;
    width: 300px;
    height: 300px;
}

.container-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 150px;
    background: var(--primary-color);
    border-radius: 10px;
    animation: float 3s ease-in-out infinite;
}

.whale-icon {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    font-size: 5rem;
    animation: swim 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translate(-50%, -50%) translateY(0);
    }
    50% {
        transform: translate(-50%, -50%) translateY(-20px);
    }
}

@keyframes swim {
    0%, 100% {
        transform: translateX(-50%) rotate(0deg);
    }
    50% {
        transform: translateX(-50%) rotate(5deg);
    }
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: #1a7ebf;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(36, 150, 237, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--light-color);
    border-color: var(--light-color);
}

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

.btn-small {
    padding: 8px 20px;
    font-size: 0.9rem;
}

/* Section */
.section {
    padding: 80px 0;
}

.section.bg-light {
    background: var(--gray-light);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--dark-color);
}

/* 特性网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--light-color);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    color: var(--dark-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.feature-card p {
    color: var(--gray-dark);
    line-height: 1.6;
}

/* 标签页 */
.tabs {
    margin-top: 40px;
}

.tab-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--gray-medium);
    padding-bottom: 20px;
}

.tab-button {
    padding: 10px 25px;
    background: transparent;
    border: 2px solid var(--gray-medium);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: var(--gray-dark);
    transition: var(--transition);
}

.tab-button:hover {
    background: var(--gray-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tab-button.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--light-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

/* 代码块 */
.code-block {
    background: var(--dark-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 30px;
}

.code-block h3 {
    background: var(--primary-color);
    color: var(--light-color);
    padding: 15px 20px;
    margin: 0;
    font-size: 1.1rem;
}

.code-container {
    position: relative;
}

.code-container pre {
    padding: 20px;
    margin: 0;
    overflow-x: auto;
    color: #e0e0e0;
}

.code-container code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.95rem;
    line-height: 1.5;
}

.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 8px 16px;
    background: var(--primary-color);
    color: var(--light-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.copy-btn:hover {
    background: #1a7ebf;
}

/* 信息卡片 */
.info-card {
    background: var(--light-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
}

.info-card h3 {
    color: var(--dark-color);
    margin-bottom: 20px;
}

.info-card ul {
    list-style: none;
}

.info-card li {
    padding: 10px 0;
    color: var(--gray-dark);
}

.info-card code {
    background: var(--gray-light);
    padding: 2px 8px;
    border-radius: 4px;
    color: var(--primary-color);
    font-weight: 600;
}

/* 命令网格 */
.commands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.command-category {
    background: var(--light-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.command-category h3 {
    color: var(--dark-color);
    margin-bottom: 20px;
    font-size: 1.3rem;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--gray-medium);
}

.command-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.command-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.command-item code {
    background: var(--gray-light);
    padding: 10px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    color: var(--primary-color);
    word-break: break-all;
}

.command-item span {
    color: var(--gray-dark);
    font-size: 0.9rem;
}

/* 示例网格 */
.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.example-card {
    background: var(--light-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.example-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.example-card h3 {
    color: var(--dark-color);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.example-card p {
    color: var(--gray-dark);
    margin-bottom: 20px;
}

.example-code {
    background: var(--dark-color);
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    overflow-x: auto;
}

.example-code pre {
    margin: 0;
    color: #e0e0e0;
}

.example-code code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* 最佳实践 */
.practices-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.practice-item {
    display: flex;
    gap: 20px;
    background: var(--light-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.practice-item:hover {
    transform: translateX(10px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.practice-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.practice-content h3 {
    color: var(--dark-color);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.practice-content p {
    color: var(--gray-dark);
    line-height: 1.6;
}

.practice-content code {
    background: var(--gray-light);
    padding: 2px 8px;
    border-radius: 4px;
    color: var(--primary-color);
    font-weight: 600;
}

/* 学习路径 */
.learning-path {
    max-width: 800px;
    margin: 0 auto;
}

.path-step {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    position: relative;
}

.path-step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 25px;
    top: 60px;
    width: 2px;
    height: calc(100% - 20px);
    background: var(--gray-medium);
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--light-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    flex-shrink: 0;
    z-index: 1;
}

.step-content {
    flex: 1;
    background: var(--light-color);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.step-content h3 {
    color: var(--dark-color);
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.step-content p {
    color: var(--gray-dark);
    margin-bottom: 10px;
}

.step-duration {
    display: inline-block;
    background: var(--primary-color);
    color: var(--light-color);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
}

/* 页脚 */
.footer {
    background: var(--dark-color);
    color: var(--light-color);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 目录树形结构样式 */
.code-container pre {
    font-size: 0.85rem;
    line-height: 1.4;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .nav-menu {
        display: none;
    }

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

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

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

    .tab-buttons {
        flex-wrap: wrap;
    }

    .tab-button {
        flex: 1;
        min-width: 120px;
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}