/* ==================== 
   龙虾学院 - 样式表
   ==================== */

/* 基础变量 */
:root {
    --primary: #ff6b35;
    --primary-dark: #e55a2b;
    --secondary: #4ecdc4;
    --accent: #ffe66d;
    --dark: #2d3436;
    --light: #f8f9fa;
    --gray: #636e72;
    --gray-light: #b2bec3;
    --white: #ffffff;
    --gradient-start: #ff6b35;
    --gradient-end: #ff8c42;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
}

/* 重置与基础 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background: var(--light);
}

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

/* ==================== 
   导航栏
   ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    text-decoration: none;
}

.logo-icon {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 16px;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    gap: 12px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--dark);
    transition: var(--transition);
}

/* ==================== 
   按钮样式
   ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
    background: var(--white);
    color: var(--dark);
    border: 2px solid var(--gray-light);
}

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

.btn-outline {
    background: transparent;
    color: var(--dark);
    border: 2px solid var(--dark);
}

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

.btn-large {
    padding: 14px 28px;
    font-size: 1rem;
}

/* ==================== 
   Hero 区域
   ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 30px 0 15px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #ff6b35, #ff8c42);
    top: -100px;
    right: -100px;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #4ecdc4, #44a08d);
    bottom: -50px;
    left: -100px;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #ffe66d, #ffd93d);
    top: 50%;
    left: 30%;
    opacity: 0.3;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 107, 53, 0.1);
    color: var(--primary);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 28px;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--gray);
    margin-bottom: 28px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
}

.hero-stats {
    margin-bottom: 24px;
    display: flex;
    gap: 32px;
}

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

.stat-number {
    font-size: 3rem;
    display: block;
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: 1rem;
    font-size: 0.9rem;
    color: var(--gray);
}

/* Hero 视觉 */
.hero-visual {
    position: relative;
    height: 500px;
}

.lobster-mascot {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.mascot-body {
    font-size: 8rem;
    animation: float 3s ease-in-out infinite;
}

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

.chat-bubbles {
    position: absolute;
    top: 0;
    left: 100%;
    width: 200px;
}

.bubble {
    background: var(--white);
    padding: 12px 16px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 10px;
    font-size: 0.85rem;
    opacity: 0;
    animation: bubble-in 0.5s ease forwards;
}

.bubble-1 { animation-delay: 0.5s; }
.bubble-2 { animation-delay: 1.5s; }
.bubble-3 { animation-delay: 2.5s; }

@keyframes bubble-in {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.feature-cards {
    position: absolute;
    width: 100%;
    height: 100%;
}

.feature-card {
    position: absolute;
    background: var(--white);
    padding: 16px 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    animation: card-float 4s ease-in-out infinite;
}

.feature-card i {
    font-size: 1.2rem;
    color: var(--primary);
}

.card-1 { top: 10%; left: 0; animation-delay: 0s; }
.card-2 { top: 30%; right: 0; animation-delay: 1s; }
.card-3 { bottom: 30%; left: 10%; animation-delay: 2s; }
.card-4 { bottom: 10%; right: 10%; animation-delay: 3s; }

@keyframes card-float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(2deg); }
}

/* ==================== 
   快速开始
   ==================== */
.quick-start {
    padding: 60px 0;
    background: var(--white);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.step-card {
    background: var(--light);
    padding: 24px 20px;
    border-radius: var(--radius-lg);
    text-align: center;
    position: relative;
    transition: var(--transition);
}

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

.step-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.step-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 20px auto;
    font-size: 2rem;
    color: var(--white);
}

.step-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.step-card p {
    color: var(--gray);
    margin-bottom: 16px;
}

.step-example {
    background: var(--dark);
    color: var(--white);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-family: 'Monaco', monospace;
}

/* ==================== 
   章节样式
   ==================== */
.section {
    padding: 30px 0;
}

/* 统一 section 内部第一个容器的间距 */
.section > .container > div:first-child {
    margin-top: 0 !important;
}

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

.section-header {
    text-align: center;
    margin-bottom: 16px;
}

.section-tag {
    display: inline-block;
    background: rgba(255, 107, 53, 0.1);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.section-desc {
    color: var(--gray);
    font-size: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

/* ==================== 
   学习路径
   ==================== */
.learning-path {
    max-width: 900px;
    margin: 0 auto;
}

.path-track {
    position: relative;
}

.path-line {
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
}

.path-item {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    position: relative;
}

.path-marker {
    width: 50px;
    height: 50px;
    background: var(--white);
    border: 3px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary);
    flex-shrink: 0;
    z-index: 1;
}

.path-item.active .path-marker {
    background: var(--primary);
    color: var(--white);
}

.path-content {
    flex: 1;
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.path-content h3 {
    font-size: 1.4rem;
    margin-bottom: 16px;
}

.path-content ul {
    margin: 16px 0;
    padding-left: 20px;
}

.path-content li {
    margin-bottom: 8px;
    color: var(--gray);
}

.path-content li i {
    color: var(--secondary);
    margin-right: 8px;
}

/* Tip Box */
.tip-box {
    background: rgba(78, 205, 196, 0.1);
    border-left: 4px solid var(--secondary);
    padding: 16px 20px;
    border-radius: 0 8px 8px 0;
    margin-top: 20px;
    display: flex;
    gap: 12px;
}

.tip-box i {
    color: var(--secondary);
    font-size: 1.2rem;
}

.tip-box.warning {
    background: rgba(255, 107, 53, 0.1);
    border-left-color: var(--primary);
}

.tip-box.warning i {
    color: var(--primary);
}

/* Do & Don't */
.do-dont {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 20px;
}

.do, .dont {
    padding: 20px;
    border-radius: var(--radius);
}

.do {
    background: rgba(78, 205, 196, 0.1);
}

.dont {
    background: rgba(231, 76, 60, 0.1);
}

.do h4 {
    color: #27ae60;
    margin-bottom: 12px;
}

.dont h4 {
    color: #e74c3c;
    margin-bottom: 12px;
}

.do-dont ul {
    list-style: none;
    padding: 0;
}

.do-dont li {
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.do li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #27ae60;
}

.dont li::before {
    content: '✗';
    position: absolute;
    left: 0;
    color: #e74c3c;
}

/* 文件指南 */
.file-guide {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 20px 0;
}

.file-method {
    border: 2px solid var(--gray-light);
    border-radius: var(--radius);
    padding: 20px;
}

.file-method.recommended {
    border-color: var(--secondary);
    background: rgba(78, 205, 196, 0.05);
}

.method-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.badge {
    background: var(--secondary);
    color: var(--white);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-secondary {
    background: var(--gray-light);
}

.method-flow {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 16px;
    font-size: 0.85rem;
}

.flow-step {
    background: var(--white);
    padding: 8px 12px;
    border-radius: 6px;
    font-weight: 500;
}

/* AI 团队 */
.ai-team {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin: 20px 0;
}

.team-category {
    background: var(--light);
    padding: 20px;
    border-radius: var(--radius);
}

.team-category h4 {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.team-members {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.member-tag {
    background: var(--white);
    padding: 6px 12px;
    border-radius: 50px;
    font-size: 0.85rem;
    border: 1px solid var(--gray-light);
}

/* 代码块 */
.code-block {
    background: var(--dark);
    border-radius: var(--radius);
    overflow: hidden;
    margin: 20px 0;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: 0.85rem;
}

.copy-btn {
    background: transparent;
    border: none;
    color: var(--gray-light);
    cursor: pointer;
    transition: var(--transition);
}

.copy-btn:hover {
    color: var(--white);
}

.code-block pre {
    padding: 16px;
    margin: 0;
    overflow-x: auto;
}

.code-block code {
    color: var(--white);
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ==================== 
   教程标签页
   ==================== */
.tutorial-tabs {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.tab-nav {
    display: flex;
    border-bottom: 1px solid var(--gray-light);
    overflow-x: auto;
}

.tab-btn {
    flex: 1;
    padding: 20px;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--primary);
    background: rgba(255, 107, 53, 0.05);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom: 3px solid var(--primary);
}

.tab-content {
    display: none;
    padding: 30px;
}

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

.tutorial-header {
    text-align: center;
    margin-bottom: 16px;
}

.tutorial-header h3 {
    font-size: 1.8rem;
    margin-bottom: 8px;
}

.tutorial-header p {
    color: var(--gray);
}

.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.tutorial-item {
    background: var(--light);
    padding: 24px;
    border-radius: var(--radius);
    transition: var(--transition);
}

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

.item-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
    margin-bottom: 16px;
}

.tutorial-item h4 {
    font-size: 1rem;
    margin-bottom: 12px;
}

.tutorial-item ul {
    list-style: none;
    padding: 0;
    margin-bottom: 16px;
}

.tutorial-item li {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 6px;
    padding-left: 16px;
    position: relative;
}

.tutorial-item li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
}

.item-example {
    background: var(--dark);
    color: var(--white);
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
}

.item-example code {
    font-family: monospace;
}

/* ==================== 
   最佳实践
   ==================== */
.practices-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.practice-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

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

.card-header {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--white);
    padding: 24px;
    position: relative;
}

.card-number {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 3rem;
    font-weight: 800;
    opacity: 0.3;
}

.card-header h3 {
    font-size: 1.3rem;
    margin-top: 20px;
}

.card-body {
    padding: 24px;
}

.card-desc {
    color: var(--gray);
    margin-bottom: 16px;
}

/* 对比 */
.compare {
    display: grid;
    gap: 12px;
}

.compare-item {
    padding: 12px;
    border-radius: 8px;
    font-size: 0.9rem;
}

.compare-item.bad {
    background: rgba(231, 76, 60, 0.1);
}

.compare-item.good {
    background: rgba(39, 174, 96, 0.1);
}

.compare-item .label {
    display: block;
    font-weight: 600;
    margin-bottom: 4px;
}

.compare-item.bad .label { color: #e74c3c; }
.compare-item.good .label { color: #27ae60; }

/* 步骤流程 */
.step-flow {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

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

.flow-item .step {
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin: 0 auto 8px;
}

.flow-item p {
    font-size: 0.8rem;
    color: var(--gray);
}

/* 示例标签 */
.examples {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.example-tag {
    background: var(--light);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
}

/* 迭代步骤 */
.iteration-steps p {
    margin-bottom: 12px;
    padding-left: 20px;
    position: relative;
}

.iteration-steps p::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* 提示列表 */
.tips-list {
    list-style: none;
    padding: 0;
}

.tips-list li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tips-list li i {
    color: var(--secondary);
}

/* 快捷指令 */
.shortcuts {
    display: grid;
    gap: 10px;
}

.shortcut {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background: var(--light);
    border-radius: 6px;
}

.shortcut code {
    background: var(--dark);
    color: var(--white);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
}

.shortcut span {
    font-size: 0.85rem;
    color: var(--gray);
}

/* ==================== 
   FAQ
   ==================== */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-search {
    position: relative;
    margin-bottom: 16px;
}

.faq-search i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
}

.faq-search input {
    width: 100%;
    padding: 16px 16px 16px 48px;
    border: 2px solid var(--gray-light);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
}

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

.faq-categories {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.cat-btn {
    padding: 10px 20px;
    border: 2px solid var(--gray-light);
    background: var(--white);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

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

.faq-list {
    display: grid;
    gap: 16px;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--light);
}

.q-icon {
    width: 32px;
    height: 32px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.q-text {
    flex: 1;
    font-weight: 600;
}

.faq-question i {
    color: var(--gray);
    transition: var(--transition);
}

.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: 1000px;
}

.faq-answer > * {
    padding: 0 24px 20px 72px;
}

.faq-answer p {
    margin-bottom: 12px;
}

.faq-answer ul,
.faq-answer ol {
    margin-bottom: 16px;
    padding-left: 20px;
}

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

.faq-answer .tip {
    background: rgba(78, 205, 196, 0.1);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
}

.faq-more {
    text-align: center;
    margin-top: 40px;
    padding: 24px;
    background: var(--white);
    border-radius: var(--radius);
}

.faq-more p {
    color: var(--gray);
    margin-bottom: 16px;
}

/* ==================== 
   练习场
   ==================== */
.playground-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.challenge-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.challenge-level {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.challenge-card:nth-child(1) .challenge-level {
    background: rgba(39, 174, 96, 0.1);
    color: #27ae60;
}

.challenge-card:nth-child(2) .challenge-level {
    background: rgba(255, 107, 53, 0.1);
    color: var(--primary);
}

.challenge-card:nth-child(3) .challenge-level {
    background: rgba(155, 89, 182, 0.1);
    color: #9b59b6;
}

.challenge-card h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.challenge-desc {
    color: var(--gray);
    margin-bottom: 16px;
}

.challenge-tasks {
    margin-bottom: 16px;
}

.task {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-light);
}

.task:last-child {
    border-bottom: none;
}

.task input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.task label {
    cursor: pointer;
    flex: 1;
}

.task input:checked + label {
    text-decoration: line-through;
    color: var(--gray-light);
}

/* ==================== 
   场景表格
   ==================== */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 0.9rem;
}

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

th, td {
    padding: 12px 16px;
    text-align: left;
    border: 1px solid var(--gray-light);
}

th {
    font-weight: 600;
}

tbody tr:nth-child(even) {
    background: var(--light);
}

tbody tr:hover {
    background: rgba(255, 107, 53, 0.05);
}

/* ==================== 
   页脚
   ==================== */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 30px 0 15px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 32px;
    margin-bottom: 16px;
}

.footer-brand .logo-icon {
    font-size: 2.5rem;
}

.footer-brand .logo-text {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-brand p {
    color: var(--gray-light);
    margin-top: 8px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.link-group h4 {
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--white);
}

.link-group a {
    display: block;
    color: var(--gray-light);
    text-decoration: none;
    margin-bottom: 10px;
    transition: var(--transition);
}

.link-group a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray-light);
    font-size: 0.9rem;
}

/* ==================== 
   响应式设计
   ==================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-visual {
        display: none;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
    margin-bottom: 20px;
        justify-content: center;
    }
    
    .steps,
    .practices-grid,
    .playground-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tutorial-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .do-dont,
    .file-guide,
    .ai-team {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu,
    .nav-actions {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero {
        padding: 100px 0 40px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
    margin-bottom: 20px;
        flex-direction: column;
        gap: 16px;
    }
    
    .steps,
    .practices-grid,
    .playground-container,
    .tutorial-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .path-item {
        flex-direction: column;
        gap: 16px;
    }
    
    .path-line {
        display: none;
    }
    
    .tab-nav {
        flex-wrap: nowrap;
        overflow-x: auto;
    }
    
    .tab-btn {
        flex: 0 0 auto;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .faq-answer > * {
        padding: 0 20px 20px 20px;
    }
}

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

.section {
    animation: fadeIn 0.6s ease;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray);
}

/* ==================== 
   什么是龙虾 - 新样式
   ==================== */

/* 龙虾介绍主区域 */
.lobster-intro {
    background: linear-gradient(135deg, #fff5f2 0%, #fff 100%);
    border-radius: var(--radius-lg);
    padding: 30px;
    margin-bottom: 16px;
    border: 2px solid rgba(255, 107, 53, 0.1);
}

.intro-main {
    display: flex;
    align-items: center;
    gap: 32px;
}

.intro-icon {
    flex-shrink: 0;
}

.big-lobster {
    font-size: 120px;
    display: block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.intro-content h3 {
    font-size: 2rem;
    color: var(--dark);
    margin-bottom: 16px;
}

.intro-desc {
    font-size: 1rem;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 16px;
}

.intro-features {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.feature-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--white);
    padding: 10px 20px;
    border-radius: 30px;
    border: 2px solid var(--primary);
    color: var(--primary);
    font-weight: 500;
}

.feature-tag i {
    font-size: 1rem;
}

/* 起源与发展时间线 */
.origin-section {
    margin-bottom: 16px;
}

.subsection-title {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.subsection-title i {
    color: var(--primary);
}

.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    margin-bottom: 16px;
    padding-left: 40px;
}

.timeline-marker {
    position: absolute;
    left: -32px;
    top: 0;
    width: 60px;
    height: 30px;
    background: var(--primary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.85rem;
}

.timeline-marker.current {
    background: var(--secondary);
    width: 70px;
}

.timeline-content {
    background: var(--white);
    padding: 25px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid rgba(0,0,0,0.05);
}

.timeline-content h4 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge.origin {
    background: #e3f2fd;
    color: #1976d2;
}

.badge.origin-cn {
    background: #fce4ec;
    color: #c2185b;
}

.badge.open {
    background: #e8f5e9;
    color: #388e3c;
}

.badge.closed {
    background: #fff3e0;
    color: #f57c00;
}

.badge.internal {
    background: #f3e5f5;
    color: #7b1fa2;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 15px;
}

.tech-tag {
    background: var(--light);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--gray);
}

.variant-list {
    margin-top: 15px;
    padding-left: 20px;
}

.variant-list li {
    margin-bottom: 10px;
    color: var(--gray);
}

.variant-list li strong {
    color: var(--dark);
}

.highlight-box {
    background: linear-gradient(135deg, var(--primary) 0%, var(--gradient-end) 100%);
    color: white;
    padding: 15px 20px;
    border-radius: var(--radius);
    margin-top: 15px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.highlight-box i {
    font-size: 1.2rem;
}

/* 对比表格 */
.comparison-section {
    margin-bottom: 16px;
}

.comparison-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
}

.comparison-table th {
    background: var(--dark);
    color: white;
    padding: 16px;
    text-align: left;
    font-weight: 500;
}

.comparison-table td {
    padding: 16px;
    border-bottom: 1px solid #eee;
}

.comparison-table tr:hover {
    background: var(--light);
}

.comparison-table tr.highlight-row {
    background: linear-gradient(135deg, #fff5f2 0%, #fff 100%);
    border: 2px solid var(--primary);
}

/* 为什么选择龙虾 */
.why-lobster {
    margin-bottom: 16px;
}

.reason-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.reason-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid rgba(0,0,0,0.05);
    transition: var(--transition);
}

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

.reason-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--gradient-end) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

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

.reason-card h4 {
    font-size: 1rem;
    margin-bottom: 12px;
    color: var(--dark);
}

.reason-card p {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 生态图 */
.ecosystem-section {
    margin-bottom: 16px;
}

.ecosystem-diagram {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow);
}

.eco-core {
    text-align: center;
    margin-bottom: 16px;
}

.core-box {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--gradient-end) 100%);
    padding: 30px 50px;
    border-radius: var(--radius-lg);
    color: white;
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.3);
}

.core-icon {
    font-size: 50px;
}

.core-text {
    font-size: 1.3rem;
    font-weight: 600;
}

.eco-layers {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.eco-layer {
    display: flex;
    align-items: center;
    gap: 16px;
}

.layer-label {
    width: 100px;
    font-weight: 600;
    color: var(--gray);
    text-align: right;
}

.layer-items {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.layer-item {
    background: var(--light);
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--dark);
    border: 1px solid rgba(0,0,0,0.05);
}

/* ==================== 
   安装部署 - 新样式
   ==================== */

.deploy-section {
    margin-bottom: 16px;
}

.requirement-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.req-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid rgba(0,0,0,0.05);
}

.req-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--gradient-end) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.req-icon i {
    font-size: 1.3rem;
    color: white;
}

.req-card h4 {
    font-size: 1rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.req-list {
    list-style: none;
}

.req-list li {
    padding: 8px 0;
    color: var(--gray);
    border-bottom: 1px dashed #eee;
}

.req-list li:last-child {
    border-bottom: none;
}

.req-list li strong {
    color: var(--dark);
}

/* 安装方式 */
.install-methods {
    margin-bottom: 16px;
}

.method-card {
    background: var(--white);
    padding: 35px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 2px solid var(--secondary);
    position: relative;
}

.method-card.recommended {
    border-color: var(--primary);
}

.method-badge {
    position: absolute;
    top: -12px;
    right: 30px;
    background: var(--primary);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.method-card h4 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--dark);
}

.method-desc {
    color: var(--gray);
    margin-bottom: 16px;
}

.method-notes {
    margin-top: 20px;
    padding: 15px;
    background: #e8f5e9;
    border-radius: 8px;
    color: #2e7d32;
}

.method-notes i {
    margin-right: 8px;
}

/* 分步安装 */
.step-install {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.install-step {
    display: flex;
    gap: 25px;
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--gradient-end) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.3rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-content h4 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--dark);
}

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

.tip-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    background: #fff3e0;
    border-radius: 8px;
    color: #e65100;
}

.tip-item a {
    color: var(--primary);
    text-decoration: underline;
}

/* 部署模式 */
.deploy-modes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.mode-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid rgba(0,0,0,0.05);
}

.mode-header {
    background: linear-gradient(135deg, var(--dark) 0%, #404040 100%);
    color: white;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.mode-header i {
    font-size: 1.5rem;
}

.mode-header h4 {
    font-size: 1.2rem;
}

.mode-body {
    padding: 25px;
}

.mode-body p {
    color: var(--gray);
    margin-bottom: 15px;
}

.mode-body ul {
    margin-bottom: 16px;
    padding-left: 20px;
}

.mode-body li {
    padding: 5px 0;
    color: var(--dark);
}

.mode-cmd {
    background: var(--dark);
    padding: 12px 15px;
    border-radius: 8px;
    overflow-x: auto;
}

.mode-cmd code {
    color: #4ecdc4;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
}

/* 部署FAQ */
.deploy-faq {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.deploy-faq .faq-item {
    border-bottom: 1px solid #eee;
}

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

.deploy-faq .faq-question {
    padding: 20px 25px;
    background: var(--light);
    cursor: pointer;
    transition: var(--transition);
}

.deploy-faq .faq-question:hover {
    background: rgba(0,0,0,0.03);
}

.deploy-faq .faq-answer {
    background: var(--white);
}

.deploy-faq .faq-answer > * {
    padding: 0 25px 25px 25px;
}

.deploy-faq .faq-answer code {
    display: block;
    background: var(--dark);
    color: #4ecdc4;
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    overflow-x: auto;
}

/* 部署完成下一步 */
.deploy-next {
    text-align: center;
    padding: 30px;
}

.next-box {
    background: linear-gradient(135deg, #e8f5e9 0%, #f1f8e9 100%);
    border: 2px solid #4caf50;
    border-radius: var(--radius-lg);
    padding: 30px;
    display: inline-block;
}

.next-box i {
    font-size: 50px;
    color: #4caf50;
    margin-bottom: 16px;
}

.next-box h4 {
    font-size: 1.5rem;
    color: #2e7d32;
    margin-bottom: 10px;
}

.next-box p {
    color: var(--gray);
    margin-bottom: 25px;
}

.next-box code {
    background: var(--dark);
    color: #4ecdc4;
    padding: 5px 12px;
    border-radius: 4px;
}

.next-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .lobster-intro {
        padding: 24px;
    }
    
    .intro-main {
        flex-direction: column;
        text-align: center;
        gap: 32px;
    }
    
    .big-lobster {
        font-size: 80px;
    }
    
    .intro-features {
        justify-content: center;
    }
    
    .timeline {
        padding-left: 20px;
    }
    
    .timeline-marker {
        left: -25px;
        width: 50px;
        height: 25px;
        font-size: 0.75rem;
    }
    
    .timeline-content {
        padding: 20px;
    }
    
    .install-step {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .eco-layer {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .layer-label {
        text-align: left;
        width: auto;
    }
    
    .next-box {
        padding: 24px;
    }
}

/* ==================== 
   什么是龙虾 - 科普模块样式
   ==================== */

/* 主介绍区 */
.lobster-intro {
    margin-bottom: 16px;
}

.intro-main {
    display: flex;
    align-items: center;
    gap: 32px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.1) 0%, rgba(78, 205, 196, 0.1) 100%);
    border-radius: var(--radius-lg);
    padding: 30px;
}

.intro-icon {
    flex-shrink: 0;
}

.big-lobster {
    font-size: 120px;
    display: block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.intro-content h3 {
    font-size: 1.8rem;
    margin-bottom: 16px;
    color: var(--dark);
}

.intro-desc {
    font-size: 1rem;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 16px;
}

.intro-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.feature-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--white);
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--dark);
    box-shadow: var(--shadow);
}

.feature-tag i {
    color: var(--primary);
}

/* 时间线 */
.origin-section {
    margin-bottom: 16px;
}

.subsection-title {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.subsection-title i {
    color: var(--primary);
}

.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    padding-bottom: 40px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -38px;
    width: 20px;
    height: 20px;
    background: var(--white);
    border: 4px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.timeline-marker.current {
    border-color: var(--secondary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(78, 205, 196, 0.4); }
    50% { box-shadow: 0 0 0 10px rgba(78, 205, 196, 0); }
}

.year {
    position: absolute;
    left: -80px;
    font-weight: 700;
    color: var(--primary);
    font-size: 0.9rem;
}

.timeline-content h4 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.timeline-content p {
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 16px;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge.origin {
    background: #e3f2fd;
    color: #1976d2;
}

.badge.origin-cn {
    background: #fff3e0;
    color: #f57c00;
}

.badge.open {
    background: #e8f5e9;
    color: #388e3c;
}

.badge.closed {
    background: #fce4ec;
    color: #c2185b;
}

.badge.internal {
    background: #f3e5f5;
    color: #7b1fa2;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-tag {
    padding: 4px 12px;
    background: var(--light);
    border-radius: 16px;
    font-size: 0.85rem;
    color: var(--gray);
}

.variant-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.variant-list li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.variant-list li:last-child {
    border-bottom: none;
}

.highlight-box {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(78, 205, 196, 0.1));
    border-radius: var(--radius);
    border-left: 4px solid var(--primary);
    margin-top: 16px;
}

.highlight-box i {
    color: var(--primary);
    font-size: 1.2rem;
}

/* 对比表格 */
.comparison-section {
    margin-bottom: 16px;
}

.comparison-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
}

.comparison-table th,
.comparison-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.comparison-table th {
    background: var(--dark);
    color: var(--white);
    font-weight: 600;
}

.comparison-table tr:hover {
    background: rgba(255, 107, 53, 0.02);
}

.comparison-table .highlight-row {
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.05), rgba(78, 205, 196, 0.05));
}

.comparison-table .highlight-row td {
    font-weight: 500;
}

/* 为什么选择 */
.why-lobster {
    margin-bottom: 16px;
}

.reason-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.reason-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

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

.reason-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.reason-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.reason-card h4 {
    font-size: 1rem;
    margin-bottom: 12px;
}

.reason-card p {
    font-size: 0.9rem;
    color: var(--gray);
    line-height: 1.6;
}

/* 生态图 */
.ecosystem-section {
    margin-bottom: 16px;
}

.ecosystem-diagram {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow);
}

.eco-core {
    text-align: center;
    margin-bottom: 16px;
}

.core-box {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    padding: 20px 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-lg);
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.core-icon {
    font-size: 48px;
}

.core-text {
    font-size: 1.5rem;
    font-weight: 700;
}

.eco-layers {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.eco-layer {
    display: flex;
    align-items: center;
    gap: 16px;
}

.layer-label {
    width: 100px;
    font-weight: 600;
    color: var(--gray);
    text-align: right;
    flex-shrink: 0;
}

.layer-items {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    flex: 1;
}

.layer-item {
    padding: 10px 20px;
    background: var(--light);
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--dark);
    border: 2px solid transparent;
    transition: var(--transition);
}

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

/* ==================== 
   安装部署 - 样式
   ==================== */

.deploy-section {
    margin-bottom: 16px;
}

/* 环境要求卡片 */
.requirement-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.req-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.req-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.req-icon i {
    font-size: 1.3rem;
    color: var(--white);
}

.req-card h4 {
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.req-list {
    list-style: none;
    padding: 0;
}

.req-list li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    font-size: 0.9rem;
    color: var(--gray);
}

.req-list li:last-child {
    border-bottom: none;
}

/* 安装方法 */
.install-methods {
    margin-bottom: 16px;
}

.method-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    position: relative;
}

.method-card.recommended {
    border: 2px solid var(--primary);
}

.method-badge {
    position: absolute;
    top: -12px;
    left: 30px;
    background: var(--primary);
    color: var(--white);
    padding: 4px 16px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.method-card h4 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.method-desc {
    color: var(--gray);
    margin-bottom: 16px;
}

.method-notes {
    margin-top: 20px;
    padding: 16px;
    background: rgba(78, 205, 196, 0.1);
    border-radius: var(--radius);
    border-left: 4px solid var(--secondary);
}

.method-notes i {
    color: var(--secondary);
}

/* 分步安装 */
.step-install {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.install-step {
    display: flex;
    gap: 16px;
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.step-content h4 {
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.config-tips {
    margin-top: 20px;
}

.tip-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--light);
    border-radius: var(--radius);
    font-size: 0.9rem;
}

.tip-item i {
    color: var(--accent);
}

.tip-item a {
    color: var(--primary);
    text-decoration: none;
}

/* 部署模式 */
.deploy-modes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.mode-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.mode-header {
    background: linear-gradient(135deg, var(--dark), #4a5568);
    color: var(--white);
    padding: 24px;
    text-align: center;
}

.mode-header i {
    font-size: 2rem;
    margin-bottom: 12px;
    display: block;
}

.mode-header h4 {
    font-size: 1.2rem;
}

.mode-body {
    padding: 24px;
}

.mode-body p {
    color: var(--gray);
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.mode-body ul {
    list-style: none;
    padding: 0;
    margin-bottom: 16px;
}

.mode-body li {
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
    font-size: 0.9rem;
    color: var(--dark);
}

.mode-body li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

.mode-cmd {
    background: var(--dark);
    padding: 12px 16px;
    border-radius: var(--radius);
    overflow-x: auto;
}

.mode-cmd code {
    color: #4ecdc4;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
}

/* 部署FAQ */
.deploy-faq {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.deploy-faq .faq-item {
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

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

/* 部署下一步 */
.deploy-next {
    text-align: center;
    margin-top: 40px;
}

.next-box {
    display: inline-block;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(78, 205, 196, 0.1));
    padding: 40px 60px;
    border-radius: var(--radius-lg);
    border: 2px dashed var(--primary);
}

.next-box > i {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 16px;
}

.next-box h4 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.next-box p {
    color: var(--gray);
    margin-bottom: 16px;
}

.next-box code {
    background: var(--dark);
    color: var(--secondary);
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.9rem;
}

.next-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 24px;
}

/* ==================== 
   响应式适配
   ==================== */

@media (max-width: 1024px) {
    .intro-main {
        flex-direction: column;
        text-align: center;
    }
    
    .intro-features {
        justify-content: center;
    }
    
    .reason-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .requirement-cards,
    .deploy-modes {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .big-lobster {
        font-size: 80px;
    }
    
    .timeline {
        padding-left: 20px;
    }
    
    .year {
        position: static;
        display: block;
        margin-bottom: 8px;
        margin-left: -40px;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 12px 16px;
        font-size: 0.9rem;
    }
    
    .eco-layer {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .layer-label {
        text-align: left;
        width: auto;
    }
    
    .reason-grid,
    .requirement-cards,
    .deploy-modes {
        grid-template-columns: 1fr;
    }
    
    .install-step {
        flex-direction: column;
        gap: 16px;
    }
    
    .next-box {
        padding: 24px;
    }
    
    .next-actions {
        flex-direction: column;
    }
}

/* ==================== 
   核心组件安装 - 样式
   ==================== */

.component-install {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 16px;
}

.component-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.component-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background: linear-gradient(135deg, var(--dark), #4a5568);
    color: var(--white);
}

.component-logo {
    width: 50px;
    height: 50px;
    background: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.component-logo.copaw {
    background: var(--secondary);
}

.component-info h4 {
    font-size: 1.3rem;
    margin-bottom: 4px;
}

.component-tag {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.8);
    background: rgba(255,255,255,0.1);
    padding: 2px 10px;
    border-radius: 10px;
}

.component-body {
    padding: 24px;
}

.component-body .code-block {
    margin-bottom: 16px;
}

.component-features h5 {
    font-size: 0.95rem;
    margin-bottom: 12px;
    color: var(--dark);
}

.component-features ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.component-features li {
    font-size: 0.85rem;
    color: var(--gray);
    padding-left: 18px;
    position: relative;
}

.component-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.component-links {
    display: flex;
    gap: 16px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(0,0,0,0.05);
}

.component-links a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

.component-links a:hover {
    color: var(--primary-dark);
}

.link-doc i {
    color: var(--secondary);
}

.link-github i {
    color: var(--dark);
}

/* 集成安装框 */
.integration-box {
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.05), rgba(78, 205, 196, 0.05));
    border: 2px solid rgba(255, 107, 53, 0.2);
    border-radius: var(--radius);
    padding: 24px;
}

.integration-box h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--dark);
}

.integration-box h4 i {
    color: var(--primary);
}

.integration-box p {
    color: var(--gray);
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.integration-box .code-block {
    margin: 0;
}

/* 响应式适配 */
@media (max-width: 1024px) {
    .component-install {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .component-header {
        flex-direction: column;
        text-align: center;
    }
    
    .component-features ul {
        grid-template-columns: 1fr;
    }
    
    .component-links {
        flex-direction: column;
        gap: 12px;
    }
    
    .integration-box {
        padding: 20px;
    }
}

/* ==================== 
   什么是龙虾 - 新版样式
   ==================== */

/* 核心概念框 */
.lobster-concept {
    margin-bottom: 16px;
}

.concept-box {
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.08), rgba(78, 205, 196, 0.08));
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    border: 2px solid rgba(255, 107, 53, 0.2);
}

.concept-icon {
    font-size: 80px;
    margin-bottom: 16px;
    display: block;
    animation: float 3s ease-in-out infinite;
}

.concept-box h3 {
    font-size: 1.8rem;
    margin-bottom: 16px;
    color: var(--dark);
}

.concept-desc {
    font-size: 1rem;
    color: var(--gray);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto 30px;
}

.concept-explain {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 30px;
}

.explain-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow);
    font-size: 0.95rem;
}

.explain-item i {
    color: var(--primary);
    font-size: 1.2rem;
}

/* 对比卡片 */
.lobster-compare {
    margin-bottom: 16px;
}

.compare-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.compare-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.compare-card.openclaw .card-header {
    background: linear-gradient(135deg, #2d3436, #636e72);
}

.compare-card.copaw .card-header {
    background: linear-gradient(135deg, #0984e3, #74b9ff);
}

.card-header {
    padding: 24px;
    text-align: center;
    color: var(--white);
}

.card-logo {
    font-size: 48px;
    margin-bottom: 10px;
}

.card-header h4 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.card-tag {
    display: inline-block;
    padding: 4px 16px;
    background: rgba(255,255,255,0.2);
    border-radius: 12px;
    font-size: 0.85rem;
}

.card-body {
    padding: 24px;
}

.compare-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

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

.compare-item .label {
    font-size: 0.85rem;
    color: var(--gray);
    font-weight: 500;
}

.compare-item .value {
    font-size: 0.95rem;
    color: var(--dark);
    line-height: 1.6;
}

.difficulty-high {
    color: #e17055 !important;
    display: flex;
    align-items: center;
    gap: 8px;
}

.difficulty-low {
    color: #00b894 !important;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 能力网格 */
.why-raise {
    margin-bottom: 16px;
}

.ability-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.ability-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

.ability-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.ability-card h4 {
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--dark);
}

.ability-card ul {
    list-style: none;
    padding: 0;
    text-align: left;
}

.ability-card li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    font-size: 0.9rem;
    color: var(--gray);
}

.ability-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

/* 火爆原因 */
.why-hot {
    margin-bottom: 16px;
}

.hot-reasons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.reason-card {
    background: linear-gradient(135deg, var(--primary), #ff8c42);
    padding: 24px;
    border-radius: var(--radius);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.reason-card.large {
    grid-column: span 1;
}

.reason-number {
    font-size: 4rem;
    font-weight: 900;
    opacity: 0.2;
    position: absolute;
    top: 10px;
    right: 20px;
}

.reason-content h4 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    position: relative;
}

.reason-content p {
    font-size: 0.95rem;
    line-height: 1.7;
    opacity: 0.95;
}

/* 警告区域 */
.warnings-section {
    margin-bottom: 16px;
}

.warning-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 16px;
}

.warning-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border-top: 4px solid;
}

.warning-card.warning-danger {
    border-color: #e74c3c;
}

.warning-card.warning-warning {
    border-color: #f39c12;
}

.warning-card.warning-info {
    border-color: #3498db;
}

.warning-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 1.3rem;
}

.warning-danger .warning-icon {
    background: rgba(231, 76, 60, 0.1);
    color: #e74c3c;
}

.warning-warning .warning-icon {
    background: rgba(243, 156, 18, 0.1);
    color: #f39c12;
}

.warning-info .warning-icon {
    background: rgba(52, 152, 219, 0.1);
    color: #3498db;
}

.warning-card h4 {
    font-size: 1rem;
    margin-bottom: 12px;
}

.warning-card p {
    font-size: 0.9rem;
    color: var(--gray);
    line-height: 1.6;
    margin-bottom: 16px;
}

.warning-tip {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: rgba(52, 152, 219, 0.1);
    border-radius: var(--radius);
    font-size: 0.85rem;
    color: var(--dark);
}

.warning-tip i {
    color: var(--primary);
}

/* 官方警告 */
.official-warning {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.05), rgba(243, 156, 18, 0.05));
    border: 2px dashed #e74c3c;
    border-radius: var(--radius);
}

.official-warning > i {
    font-size: 2rem;
    color: #e74c3c;
    flex-shrink: 0;
}

.official-warning strong {
    display: block;
    font-size: 1rem;
    color: var(--dark);
    margin-bottom: 8px;
}

.official-warning p {
    font-size: 0.9rem;
    color: var(--gray);
    line-height: 1.6;
    margin: 0;
}

/* ==================== 
   响应式适配
   ==================== */

@media (max-width: 1024px) {
    .compare-cards,
    .ability-grid,
    .hot-reasons,
    .warning-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .concept-box {
        padding: 30px 20px;
    }
    
    .concept-icon {
        font-size: 60px;
    }
    
    .concept-box h3 {
        font-size: 1.4rem;
    }
    
    .compare-cards,
    .ability-grid,
    .hot-reasons,
    .warning-cards {
        grid-template-columns: 1fr;
    }
    
    .reason-card.large {
        grid-column: auto;
    }
    
    .official-warning {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .explain-item {
        width: 100%;
        justify-content: center;
    }
}

/* ==================== 
   新闻动态板块
   ==================== */

/* 新闻控制栏 */
.news-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 16px;
}

.news-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-btn {
    padding: 10px 20px;
    border: 2px solid rgba(0,0,0,0.1);
    background: var(--white);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray);
    cursor: pointer;
    transition: var(--transition);
}

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

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

/* 新闻搜索 */
.news-search {
    display: flex;
    gap: 10px;
}

.search-input {
    padding: 10px 16px;
    border: 2px solid rgba(0,0,0,0.1);
    border-radius: 20px;
    font-size: 0.9rem;
    width: 200px;
    transition: var(--transition);
}

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

.search-btn {
    padding: 10px 20px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
}

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

/* 新闻网格 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 16px;
}

/* 新闻卡片 - 统一样式 */
.news-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
    animation: fadeInUp 0.6s ease-out backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

/* 头条卡片特殊样式 - 已禁用，统一所有卡片样式 */
/* .news-card.featured {
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.05), rgba(78, 205, 196, 0.05));
    border: 2px solid rgba(255, 107, 53, 0.2);
} */

/* 头条徽章样式 - 已禁用，统一所有卡片样式 */
/* .featured-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: var(--dark);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

.featured-badge i {
    color: #f39c12;
} */

.news-card-header {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.news-category {
    padding: 6px 14px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--white);
}

.news-date {
    font-size: 0.85rem;
    color: var(--gray);
    display: flex;
    align-items: center;
    gap: 6px;
}

.news-card-body {
    padding: 20px;
    flex: 1;
}

.news-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 12px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 头条卡片标题特殊样式 - 已禁用，统一所有卡片样式 */
/* .news-card.featured .news-title {
    font-size: 1.3rem;
} */

.news-summary {
    font-size: 0.9rem;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.news-tags .tag {
    padding: 4px 12px;
    background: rgba(78, 205, 196, 0.1);
    color: var(--secondary);
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.news-card-footer {
    padding: 20px;
    border-top: 1px solid rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.news-source {
    font-size: 0.85rem;
    color: var(--gray);
    display: flex;
    align-items: center;
    gap: 6px;
}

.read-more-btn {
    padding: 8px 16px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.read-more-btn:hover {
    background: var(--primary-dark);
    transform: translateX(4px);
}

/* 加载更多 */
.news-load-more {
    text-align: center;
    margin-bottom: 16px;
}

#loadMoreBtn {
    padding: 14px 40px;
    font-size: 1rem;
    gap: 10px;
}

/* 更新信息 */
.news-update-info {
    text-align: center;
    padding: 24px;
    background: rgba(78, 205, 196, 0.05);
    border-radius: var(--radius);
    border: 2px dashed var(--secondary);
}

.update-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--secondary);
    color: var(--white);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.update-badge i {
    animation: spin 2s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.update-desc {
    font-size: 0.9rem;
    color: var(--gray);
    margin: 0;
}

/* 新闻详情弹窗 */
.news-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.news-modal.active {
    opacity: 1;
    visibility: visible;
}

.news-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
}

.news-modal-content {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-lg);
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    transform: translateY(50px);
    transition: var(--transition);
}

.news-modal.active .news-modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(0,0,0,0.1);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    background: rgba(0,0,0,0.2);
    transform: rotate(90deg);
}

.modal-body {
    padding: 30px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 20px;
    border-bottom: 2px solid rgba(0,0,0,0.05);
}

.modal-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
    line-height: 1.4;
}

.modal-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding: 15px 20px;
    background: rgba(0,0,0,0.03);
    border-radius: var(--radius);
}

.modal-meta .source {
    font-size: 0.9rem;
    color: var(--gray);
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-meta .tags {
    display: flex;
    gap: 8px;
}

.modal-content {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--dark);
}

.modal-content p {
    margin-bottom: 16px;
}

.original-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--primary);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: 600;
    margin-top: 30px;
    transition: var(--transition);
}

.original-link:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* 无新闻提示 */
.no-news, .error-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--gray);
}

.no-news i, .error-message i {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.3;
}

.no-news p, .error-message p {
    font-size: 1rem;
}

/* ==================== 
   响应式适配
   ==================== */

@media (max-width: 1024px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-card.featured {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .news-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .news-filter {
        justify-content: center;
    }
    
    .news-search {
        justify-content: center;
    }
    
    .search-input {
        width: 100%;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-body {
        padding: 30px 20px;
    }
    
    .modal-title {
        font-size: 1.4rem;
    }
    
    .modal-meta {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
}