/* 基础变量 */
:root {
    --primary: #1a73e8;
    --primary-dark: #0d62d9;
    --primary-light: #4285f4;
    --secondary: #f8f9fa;
    --accent: #4CAF50;
    --text: #333;
    --light-text: #666;
    --border: #e0e0e0;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
    --gradient: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: #f8f9fa;
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 18px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 12px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: contain;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    font-size: 16px;
    padding: 8px 0;
    position: relative;
    transition: var(--transition);
}

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

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

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

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

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

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    padding: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    z-index: 999;
    flex-direction: column;
    gap: 15px;
}

.mobile-menu.active {
    display: flex;
}

.mobile-link {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

.mobile-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

/* 按钮 */
.btn {
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-align: center;
    border: none;
    font-size: 15px;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(26, 115, 232, 0.35);
}

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

.btn-outline:hover {
    background: rgba(26, 115, 232, 0.05);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* Hero 区域 */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edff 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(26, 115, 232, 0.08) 0%, transparent 70%);
    transform: rotate(30deg);
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
    position: relative;
    z-index: 2;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-badges {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.badge {
    background: rgba(26, 115, 232, 0.1);
    color: var(--primary);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-title span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--light-text);
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

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

.hero-image {
    flex: 1;
    max-width: 500px;
}

/* 代码预览 */
.code-preview {
    background: #1e1e1e;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.code-header {
    background: #2d2d2d;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-dot.red { background: #ff5f56; }
.code-dot.yellow { background: #ffbd2e; }
.code-dot.green { background: #27ca40; }

.code-title {
    color: #888;
    font-size: 13px;
    margin-left: auto;
}

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

.code-content code {
    color: #d4d4d4;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 1.8;
}

.code-comment { color: #6a9955; }
.code-cmd { color: #569cd6; }
.code-prompt { color: #4ec9b0; }
.code-output { color: #ce9178; }

/* 区块标题 */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--light-text);
}

/* 功能特性 */
.features {
    padding: 100px 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    border-radius: 16px;
    padding: 35px 30px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    border: 1px solid rgba(26, 115, 232, 0.1);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
    border-color: rgba(26, 115, 232, 0.2);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: rgba(26, 115, 232, 0.1);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    color: var(--primary);
    font-size: 28px;
}

.feature-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text);
}

.feature-description {
    color: var(--light-text);
}

/* 安装方法 */
.install {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edff 100%);
}

.install-tabs {
    max-width: 900px;
    margin: 0 auto;
}

.tab-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    border: none;
    background: white;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.tab-btn:hover {
    background: rgba(26, 115, 232, 0.05);
}

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

.tab-pane {
    display: none;
}

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

.install-steps {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--card-shadow);
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
}

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

.step-number {
    width: 40px;
    height: 40px;
    background: var(--gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.step-content p {
    color: var(--light-text);
}

.step-content code {
    background: rgba(26, 115, 232, 0.1);
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 4px;
}

/* 代码块 */
.code-block {
    background: #1e1e1e;
    border-radius: 12px;
    overflow: hidden;
}

.code-block .code-header {
    background: #2d2d2d;
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.code-block .code-header span {
    color: #888;
    font-size: 14px;
}

.copy-btn {
    background: transparent;
    border: 1px solid #444;
    color: #888;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

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

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

.code-block code {
    color: #d4d4d4;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 1.8;
}

/* 配置说明 */
.config {
    padding: 100px 0;
    background: white;
}

.config-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.config-example {
    position: sticky;
    top: 100px;
}

.config-options {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.config-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
}

.config-card h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--primary);
}

.config-table {
    width: 100%;
}

.config-table td {
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}

.config-table td:last-child {
    text-align: right;
    color: var(--light-text);
}

.config-table tr:last-child td {
    border-bottom: none;
}

.config-table code {
    background: rgba(26, 115, 232, 0.1);
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 13px;
}

/* 使用方法 */
.usage {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edff 100%);
}

.usage-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.usage-card {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--card-shadow);
}

.usage-card h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 25px;
    color: var(--text);
}

.command-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.command-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: #f8f9fa;
    border-radius: 8px;
}

.command-item code {
    background: rgba(26, 115, 232, 0.1);
    color: var(--primary);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 13px;
}

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

.size-table {
    width: 100%;
    border-collapse: collapse;
}

.size-table th,
.size-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.size-table th {
    color: var(--light-text);
    font-weight: 500;
}

.size-table code {
    background: rgba(26, 115, 232, 0.1);
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 13px;
}

/* 模型选择 */
.models {
    padding: 100px 0;
    background: white;
}

.models-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.model-card {
    background: white;
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--card-shadow);
    border: 2px solid var(--border);
    transition: var(--transition);
    position: relative;
}

.model-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
}

.model-card.featured {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.05) 0%, rgba(26, 115, 232, 0.02) 100%);
}

.model-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient);
    color: white;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

.model-icon {
    width: 80px;
    height: 80px;
    background: rgba(26, 115, 232, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 32px;
    color: var(--primary);
}

.model-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.model-desc {
    color: var(--light-text);
    margin-bottom: 20px;
}

.model-features {
    list-style: none;
    text-align: left;
}

.model-features li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--light-text);
}

.model-features i {
    color: var(--accent);
}

/* 常见问题 */
.faq {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edff 100%);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.faq-item {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.faq-question {
    padding: 20px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.faq-question:hover {
    background: rgba(26, 115, 232, 0.02);
}

.faq-question span {
    display: flex;
    align-items: center;
    gap: 12px;
}

.faq-question i:first-child {
    color: var(--primary);
}

.faq-question .fa-chevron-down {
    transition: transform 0.3s ease;
}

.faq-item.active .fa-chevron-down {
    transform: rotate(180deg);
}

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

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 25px 20px;
    color: var(--light-text);
}

.faq-answer a {
    color: var(--primary);
    text-decoration: none;
}

.faq-answer code {
    background: rgba(26, 115, 232, 0.1);
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 4px;
}

/* CTA */
.cta {
    padding: 80px 0;
    background: var(--gradient);
    text-align: center;
    color: white;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.cta p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

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

.cta .btn-outline {
    border-color: white;
    color: white;
}

/* 页脚 */
.footer {
    background: #1a1a2e;
    color: white;
    padding: 40px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* 响应式 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image {
        max-width: 100%;
        margin-top: 40px;
    }
    
    .config-grid {
        grid-template-columns: 1fr;
    }
    
    .config-example {
        position: static;
    }
    
    .usage-grid {
        grid-template-columns: 1fr;
    }
    
    .models-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links,
    .nav-buttons {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-stats {
        gap: 20px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .tab-buttons {
        justify-content: center;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}