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

:root {
    --primary-color: #f39c12;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #f8f9fa;
    --white: #ffffff;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 
                 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: all 0.3s;
}

a:hover {
    color: var(--secondary-color);
}

/* ==================== 导航栏 ==================== */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: var(--secondary-color);
}

.nav-brand i {
    color: var(--primary-color);
    font-size: 28px;
}

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

.nav-menu a {
    color: var(--text-color);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 5px;
    transition: all 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: var(--primary-color);
    color: var(--white);
}

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

.nav-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    font-size: 16px;
}

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

.btn-primary:hover {
    background: #e67e22;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

.btn-secondary:hover {
    background: #34495e;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-lg {
    padding: 15px 40px;
    font-size: 18px;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ==================== 英雄区 ==================== */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 100px 0;
    text-align: center;
}

.hero-title {
    font-size: 56px;
    font-weight: bold;
    margin-bottom: 20px;
    animation: fadeInUp 1s;
}

.hero-subtitle {
    font-size: 28px;
    margin-bottom: 15px;
    animation: fadeInUp 1.2s;
}

.hero-description {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
    animation: fadeInUp 1.4s;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 60px;
    animation: fadeInUp 1.6s;
}

.hero-stats {
    display: flex;
    gap: 60px;
    justify-content: center;
    animation: fadeInUp 1.8s;
}

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

.stat-number {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 16px;
    opacity: 0.9;
}

/* ==================== 特性区 ==================== */
.features {
    padding: 80px 0;
    background: var(--white);
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), #e67e22);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 36px;
    color: var(--white);
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ==================== 工作流程 ==================== */
.workflow {
    padding: 80px 0;
    background: var(--bg-color);
}

.workflow-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.step {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

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

/* ==================== 技术栈 ==================== */
.tech-stack {
    padding: 80px 0;
    background: var(--white);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.tech-item {
    background: var(--bg-color);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s;
}

.tech-item:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: scale(1.05);
}

.tech-item i {
    font-size: 48px;
    margin-bottom: 15px;
    display: block;
}

.tech-item span {
    font-size: 18px;
    font-weight: 500;
}

/* ==================== CTA区 ==================== */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    text-align: center;
}

.cta h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.cta p {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--secondary-color);
    color: var(--white);
    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 {
    font-size: 20px;
    margin-bottom: 20px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 15px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
}

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

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--white);
}

.social-links a:hover {
    background: 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);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.8);
}

/* ==================== 页面标题 ==================== */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

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

/* ==================== 文档页面 ==================== */
.docs-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 40px;
    padding: 60px 0;
}

.docs-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.docs-nav h3 {
    font-size: 16px;
    color: var(--text-light);
    margin: 20px 0 10px;
    text-transform: uppercase;
}

.docs-nav ul {
    list-style: none;
}

.docs-nav ul li {
    margin-bottom: 5px;
}

.docs-nav a {
    display: block;
    padding: 8px 15px;
    color: var(--text-color);
    border-radius: 5px;
    transition: all 0.3s;
}

.docs-nav a:hover,
.docs-nav a.active {
    background: var(--primary-color);
    color: var(--white);
}

.doc-section {
    margin-bottom: 60px;
}

.doc-section h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--secondary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

.doc-section h3 {
    font-size: 24px;
    margin: 30px 0 15px;
    color: var(--secondary-color);
}

.doc-section pre {
    background: #282c34;
    border-radius: 5px;
    padding: 20px;
    overflow-x: auto;
    margin: 20px 0;
}

.doc-section code {
    font-family: 'Courier New', monospace;
    font-size: 14px;
}

.api-endpoint {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 20px 0;
    padding: 15px;
    background: var(--bg-color);
    border-radius: 5px;
}

.method {
    padding: 5px 15px;
    border-radius: 3px;
    font-weight: bold;
    font-size: 14px;
}

.method.get {
    background: #61affe;
    color: var(--white);
}

.method.post {
    background: #49cc90;
    color: var(--white);
}

.path {
    font-family: monospace;
    font-size: 16px;
}

.api-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

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

.api-table th {
    background: var(--bg-color);
    font-weight: 600;
}

.info-box,
.warning-box {
    padding: 20px;
    border-radius: 5px;
    margin: 20px 0;
    display: flex;
    gap: 15px;
}

.info-box {
    background: #e3f2fd;
    border-left: 4px solid #2196f3;
}

.warning-box {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
}

.info-box i,
.warning-box i {
    font-size: 24px;
    flex-shrink: 0;
}

/* ==================== 下载页面 ==================== */
.download-content {
    padding: 60px 0;
}

.download-section {
    margin-bottom: 80px;
}

.download-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 40px;
}

.download-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), #e67e22);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: var(--white);
}

.download-info h2 {
    font-size: 28px;
    margin-bottom: 5px;
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.download-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    position: relative;
}

.download-card.featured {
    border: 2px solid var(--primary-color);
}

.card-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    background: var(--accent-color);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: bold;
}

.download-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

.version-info {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.version {
    background: var(--primary-color);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
}

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

.feature-list {
    list-style: none;
    margin: 20px 0;
}

.feature-list li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.download-stats {
    display: flex;
    gap: 20px;
    margin: 20px 0;
    padding: 15px 0;
    border-top: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-light);
}

.download-notes {
    background: var(--bg-color);
    padding: 20px;
    border-radius: 10px;
    margin-top: 30px;
}

.download-notes h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.download-notes ol {
    margin-left: 20px;
}

.download-notes li {
    margin-bottom: 8px;
}

.platform-icon {
    font-size: 48px;
    text-align: center;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.sdk-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sdk-item {
    background: var(--white);
    padding: 25px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

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

.sdk-header h3 {
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.version-badge {
    background: var(--bg-color);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
}

.sdk-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.changelog {
    max-width: 800px;
}

.changelog-item {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.changelog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
}

.changelog-header h3 {
    font-size: 24px;
}

.changelog-content h4 {
    font-size: 18px;
    margin: 15px 0 10px;
    color: var(--secondary-color);
}

.changelog-content ul {
    margin-left: 20px;
}

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

.system-requirements {
    background: var(--bg-color);
    padding: 40px;
    border-radius: 10px;
    margin-top: 60px;
}

.system-requirements h2 {
    font-size: 28px;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.requirement-card {
    background: var(--white);
    padding: 25px;
    border-radius: 10px;
}

.requirement-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.requirement-card li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

/* ==================== 注册页面 ==================== */
.register-content {
    padding: 60px 0;
    background: var(--bg-color);
}

.register-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1400px;
    margin: 0 auto;
}

.register-info h1 {
    font-size: 42px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 40px;
}

.benefits {
    margin-bottom: 40px;
}

.benefits h3 {
    font-size: 24px;
    margin-bottom: 20px;
}

.benefit-item {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.benefit-item i {
    font-size: 24px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.benefit-item h4 {
    font-size: 18px;
    margin-bottom: 5px;
}

.benefit-item p {
    color: var(--text-light);
}

.stats-showcase {
    display: flex;
    gap: 30px;
}

.stat-box {
    flex: 1;
    background: var(--white);
    padding: 25px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
}

.register-form-container {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
}

.form-header {
    margin-bottom: 30px;
    text-align: center;
}

.form-header h2 {
    font-size: 28px;
    margin-bottom: 10px;
}

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

.form-section h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--secondary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-group label i {
    color: var(--primary-color);
    margin-right: 5px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(243, 156, 18, 0.1);
}

.input-group {
    display: flex;
    gap: 10px;
}

.input-group input {
    flex: 1;
}

.form-hint {
    display: block;
    font-size: 14px;
    color: var(--text-light);
    margin-top: 5px;
}

.password-strength {
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    margin-top: 8px;
    overflow: hidden;
}

.strength-bar {
    height: 100%;
    width: 0;
    transition: all 0.3s;
}

.strength-bar.weak {
    width: 33%;
    background: #e74c3c;
}

.strength-bar.medium {
    width: 66%;
    background: #f39c12;
}

.strength-bar.strong {
    width: 100%;
    background: #27ae60;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
}

.form-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: var(--text-light);
}

.register-process {
    padding: 80px 0;
    background: var(--white);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.process-step {
    text-align: center;
}

.step-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--white);
    margin: 0 auto 20px;
}

.process-step h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.faq-section {
    padding: 80px 0;
    background: var(--bg-color);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    margin-bottom: 15px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    padding: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s;
}

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

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

.faq-question h3 {
    font-size: 18px;
    flex: 1;
}

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

.faq-answer p {
    padding: 0 20px 20px 59px;
    color: var(--text-light);
}

/* ==================== Toast通知 ==================== */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 15px 25px;
    border-radius: 5px;
    color: var(--white);
    font-weight: 500;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s;
    z-index: 9999;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast-success {
    background: #27ae60;
}

.toast-error {
    background: #e74c3c;
}

.toast-warning {
    background: #f39c12;
}

.toast-info {
    background: #3498db;
}

/* ==================== 加载动画 ==================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ==================== 产品页面特定样式 ==================== */
.product-overview {
    padding: 80px 0;
    background: var(--white);
}

.overview-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.overview-text h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.overview-text p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 15px;
}

.overview-image {
    text-align: center;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
}

.phone-mockup i {
    font-size: 120px;
    color: var(--white);
}

.core-features {
    padding: 80px 0;
    background: var(--bg-color);
}

.feature-detail {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 40px;
    margin-bottom: 60px;
    align-items: center;
}

.feature-detail.reverse {
    grid-template-columns: 1fr 150px;
}

.feature-detail.reverse .feature-detail-icon {
    order: 2;
}

.feature-detail.reverse .feature-detail-content {
    order: 1;
}

.feature-detail-icon {
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, var(--primary-color), #e67e22);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    color: var(--white);
}

.feature-detail-content h3 {
    font-size: 28px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.feature-detail-content p {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 15px;
}

.feature-detail-content ul {
    list-style: none;
}

.feature-detail-content li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.feature-detail-content li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.use-cases {
    padding: 80px 0;
    background: var(--white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.case-card {
    background: var(--bg-color);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s;
}

.case-card:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-5px);
}

.case-card i {
    font-size: 48px;
    margin-bottom: 20px;
    display: block;
}

.case-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.advantages {
    padding: 80px 0;
    background: var(--bg-color);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.advantage-item {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.advantage-number {
    font-size: 48px;
    font-weight: bold;
    color: var(--primary-color);
    opacity: 0.3;
    margin-bottom: 15px;
}

.advantage-item h3 {
    font-size: 22px;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.advantage-item p {
    color: var(--text-light);
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .docs-layout {
        grid-template-columns: 1fr;
    }
    
    .docs-sidebar {
        position: static;
    }
    
    .register-layout {
        grid-template-columns: 1fr;
    }
    
    .overview-content {
        grid-template-columns: 1fr;
    }
    
    .feature-detail,
    .feature-detail.reverse {
        grid-template-columns: 1fr;
    }
    
    .feature-detail.reverse .feature-detail-icon,
    .feature-detail.reverse .feature-detail-content {
        order: 0;
    }
}