/* 全局样式 */
:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --secondary-color: #06B6D4;
    --accent-color: #F59E0B;
    --text-dark: #1F2937;
    --text-light: #6B7280;
    --bg-light: #F9FAFB;
    --bg-white: #FFFFFF;
    --border-color: #E5E7EB;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --danger-color: #EF4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

/* 导航栏 - 使用更高特异性避免与 main.css 冲突 */
body .navbar {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05) !important;
    z-index: 1000 !important;
    padding: 15px 0 !important;
    height: auto !important;
}

body .navbar .container {
    display: grid !important;
    grid-template-columns: auto 1fr auto !important;
    align-items: center !important;
    gap: 20px !important;
    padding: 0 !important;
    max-width: 100% !important;
    margin: 0 !important;
}

.nav-brand {
    padding-left: 30px !important;
}

.nav-actions {
    padding-right: 30px !important;
}

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

.nav-brand .logo i {
    font-size: 28px;
}

.nav-menu {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    flex: 1;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    justify-content: flex-end;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

.btn-login {
    color: var(--text-dark) !important;
    padding: 10px 25px;
    border-radius: 8px;
    transition: all 0.3s;
    border: 2px solid var(--border-color);
    text-decoration: none !important;
}

.btn-login:hover {
    border-color: var(--primary-color);
    color: var(--primary-color) !important;
    transform: translateY(-2px);
}

/* 用户信息链接样式 */
#userInfoDisplay {
    text-decoration: none;
    color: var(--text-dark);
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.3s;
    display: inline-block;
    font-size: 14px;
}

#userInfoDisplay:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
}

.btn-primary {
    background: var(--primary-color);
    color: white !important;
    padding: 10px 25px;
    border-radius: 8px;
    transition: all 0.3s;
    text-decoration: none !important;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

/* Hero 区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,165.3C384,171,480,149,576,128C672,107,768,85,864,90.7C960,96,1056,128,1152,138.7C1248,149,1344,139,1392,133.3L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
}

.hero-logo {
    font-size: 100px;
    margin-bottom: 20px;
    animation: bounce 2s infinite;
}

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

.hero-title {
    font-size: 64px;
    font-weight: bold;
    margin-bottom: 15px;
}

.hero-slogan {
    font-size: 32px;
    margin-bottom: 10px;
    font-weight: 300;
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-hero {
    display: inline-block;
    background: white;
    color: var(--primary-color);
    padding: 18px 45px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 18px;
    font-weight: bold;
    transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-hero:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.btn-hero-login {
    display: inline-block;
    background: white;
    color: var(--primary-color);
    padding: 18px 45px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 18px;
    font-weight: bold;
    transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border: 2px solid white;
}

.btn-hero-login:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

/* 通用区块样式 */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 42px;
    font-weight: bold;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.section-header .subtitle {
    font-size: 18px;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
}

/* 产品介绍 */
.product-intro {
    background: var(--bg-white);
}

.intro-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.intro-card {
    text-align: center;
    padding: 40px 30px;
    border-radius: 16px;
    background: var(--bg-light);
    transition: all 0.3s;
}

.intro-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.intro-icon {
    font-size: 60px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.intro-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.intro-card p {
    font-size: 16px;
    color: var(--text-light);
}

/* 核心理念 */
.core-concepts {
    background: var(--bg-light);
}

.concepts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.concept-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    position: relative;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.concept-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(79, 70, 229, 0.15);
}

.concept-number {
    position: absolute;
    top: -20px;
    right: 30px;
    font-size: 72px;
    font-weight: bold;
    color: var(--primary-color);
    opacity: 0.1;
}

.concept-card h3 {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.concept-subtitle {
    font-size: 14px;
    color: var(--text-light);
    font-style: italic;
    margin-bottom: 15px;
}

.concept-card p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
}

/* 核心功能 */
.features {
    background: white;
}

.feature-block {
    margin-bottom: 60px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    transition: all 0.3s;
}

.feature-block:hover {
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.12);
}

.feature-header {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 30px 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.feature-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    font-size: 36px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.feature-header h3 {
    font-size: 28px;
    margin-bottom: 5px;
}

.feature-subtitle {
    font-size: 14px;
    opacity: 0.9;
    font-style: italic;
}

.feature-content {
    padding: 40px;
    background: white;
}

.feature-item {
    margin-bottom: 30px;
}

.feature-item:last-child {
    margin-bottom: 0;
}

.feature-item h4 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-item h4 i {
    color: var(--primary-color);
}

.feature-item ul {
    list-style: none;
    padding-left: 0;
}

.feature-item ul li {
    padding: 10px 0 10px 30px;
    position: relative;
    color: var(--text-light);
    font-size: 16px;
    line-height: 1.8;
}

.feature-item ul li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
    font-size: 18px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 25px;
}

.grid-item {
    text-align: center;
    padding: 30px 20px;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all 0.3s;
}

.grid-item:hover {
    background: white;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transform: translateY(-5px);
}

.grid-item i {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.grid-item h5 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

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

/* 产品优势 */
.advantages {
    background: var(--bg-light);
}

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

.advantage-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.advantage-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(79, 70, 229, 0.15);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    font-size: 36px;
    color: white;
}

.advantage-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.advantage-card p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
}

/* 适用行业 */
.industries {
    background: white;
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
}

.industry-card {
    background: var(--bg-light);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
}

.industry-card:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(79, 70, 229, 0.3);
}

.industry-card i {
    font-size: 48px;
    margin-bottom: 15px;
    color: var(--primary-color);
    transition: color 0.3s;
}

.industry-card:hover i {
    color: white;
}

.industry-card h4 {
    font-size: 18px;
    font-weight: 600;
}

/* 客户案例 - 信任背书 */
.testimonials {
    background: var(--bg-light);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 40px;
}

.testimonial-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    transition: all 0.3s;
}

.testimonial-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.testimonial-logo {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.testimonial-logo i {
    font-size: 40px;
    color: var(--primary-color);
}

.testimonial-logo h4 {
    font-size: 20px;
    color: var(--text-dark);
}

.testimonial-content {
    margin-bottom: 30px;
}

.quote-icon {
    font-size: 32px;
    color: var(--primary-color);
    opacity: 0.3;
    margin-bottom: 15px;
}

.testimonial-text {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.testimonial-author {
    text-align: right;
}

.author-name {
    font-size: 14px;
    color: var(--text-light);
    font-style: italic;
}

.testimonial-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.stat-item {
    text-align: center;
    padding: 20px 10px;
    background: var(--bg-light);
    border-radius: 12px;
}

.stat-number {
    font-size: 32px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

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

/* AI 智能演示 */
.ai-demo {
    background: white;
}

.ai-demo-content {
    display: grid;
    gap: 50px;
}

.ai-demo-visual {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 50px;
    border-radius: 20px;
    overflow-x: auto;
}

.ai-workflow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    min-width: 800px;
}

.workflow-step {
    flex: 1;
    text-align: center;
    color: white;
}

.step-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 15px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    transition: all 0.3s;
}

.step-icon.risk {
    background: rgba(245, 158, 11, 0.3);
}

.step-icon.alert {
    background: rgba(239, 68, 68, 0.3);
}

.step-icon.success {
    background: rgba(16, 185, 129, 0.3);
}

.workflow-step:hover .step-icon {
    transform: scale(1.1);
    background: rgba(255, 255, 255, 0.3);
}

.workflow-step h4 {
    font-size: 18px;
    margin-bottom: 10px;
}

.workflow-step p {
    font-size: 14px;
    opacity: 0.9;
}

.workflow-arrow {
    font-size: 24px;
    color: white;
    opacity: 0.6;
}

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

.demo-example {
    display: flex;
    gap: 20px;
    padding: 25px;
    background: var(--bg-light);
    border-radius: 16px;
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s;
}

.demo-example:hover {
    background: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transform: translateX(5px);
}

.example-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.example-content h5 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.example-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

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

.cta-content h2 {
    font-size: 36px;
    margin-bottom: 20px;
    line-height: 1.4;
}

.cta-content > p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

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

.contact-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 16px;
    transition: all 0.3s;
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-5px);
}

.contact-card i {
    font-size: 40px;
    margin-bottom: 15px;
}

.contact-card h4 {
    font-size: 18px;
    margin-bottom: 10px;
    opacity: 0.9;
}

.contact-card p {
    font-size: 20px;
    font-weight: bold;
}

.btn-cta {
    background: white;
    color: var(--primary-color);
    border: none;
    padding: 18px 50px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.btn-cta:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

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

.btn-cta.secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-cta.secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.cta-hint {
    font-size: 14px;
    opacity: 0.8;
    margin-top: 20px;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
    align-items: start;
}

.footer-brand .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 15px;
}

.footer-brand .logo i {
    font-size: 28px;
}

.footer-brand p {
    opacity: 0.8;
    font-size: 16px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.footer-column h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

.footer-column a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    margin-bottom: 12px;
    transition: color 0.3s;
}

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

/* 服务号二维码区域 */
.footer-qrcode-section {
    text-align: center;
}

.footer-qrcode-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: white;
}

.footer-qrcode-section .qrcode-container {
    margin: 12px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 120px;
}

.footer-qrcode-section .qrcode-container img {
    max-width: 140px;
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.footer-qrcode-section .qrcode-description {
    margin-top: 12px;
}

.footer-qrcode-section .qrcode-description p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin: 4px 0;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.footer-bottom .icp-beian {
    margin-top: 8px;
    font-size: 12px;
}

.footer-bottom .icp-beian a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-bottom .icp-beian a:hover {
    color: white;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .footer-bottom .icp-beian {
        font-size: 11px;
        word-break: break-all;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .footer-qrcode-section {
        order: -1;
        margin-bottom: 20px;
    }
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: white;
    margin: 10% auto;
    padding: 40px;
    border-radius: 20px;
    max-width: 600px;
    position: relative;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 32px;
    font-weight: bold;
    color: var(--text-light);
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: var(--text-dark);
}

.modal-content h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 32px;
    color: var(--text-dark);
}

.modal-contact-info {
    margin-bottom: 30px;
}

.modal-contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 12px;
    margin-bottom: 15px;
}

.modal-contact-item i {
    font-size: 36px;
    color: var(--primary-color);
}

.modal-contact-item h4 {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 5px;
}

.modal-contact-item p {
    font-size: 20px;
    font-weight: bold;
    color: var(--text-dark);
}

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

.modal-contact-item small {
    font-size: 12px;
    color: var(--text-light);
    display: block;
    margin-top: 5px;
}

.modal-note {
    text-align: center;
    font-size: 16px;
    color: var(--text-light);
}

.modal-intro {
    text-align: center;
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 30px;
    line-height: 1.6;
}

.demo-benefits {
    margin-top: 30px;
    padding: 25px;
    background: var(--bg-light);
    border-radius: 12px;
}

.demo-benefits h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.demo-benefits ul {
    list-style: none;
    padding: 0;
}

.demo-benefits li {
    padding: 10px 0;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.demo-benefits li i {
    color: var(--success-color);
    font-size: 18px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    body .navbar {
        padding: 12px 0 !important;
    }
    
    body .navbar .container {
        grid-template-columns: auto 1fr !important;
        grid-template-rows: auto auto !important;
        gap: 12px 0 !important;
        padding: 0 15px !important;
        align-items: center !important;
    }
    
    .nav-brand {
        padding-left: 0 !important;
        grid-column: 1;
        grid-row: 1;
    }
    
    .nav-brand .logo {
        font-size: 20px;
    }
    
    .nav-brand .logo i {
        font-size: 24px;
    }
    
    .nav-menu {
        grid-column: 1 / -1;
        grid-row: 2;
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        width: 100%;
        justify-content: flex-start;
        padding-top: 8px;
        border-top: 1px solid rgba(0, 0, 0, 0.05);
    }
    
    .nav-menu a {
        font-size: 14px;
        padding: 6px 12px;
        white-space: nowrap;
    }
    
    .nav-actions {
        grid-column: 2;
        grid-row: 1;
        justify-content: flex-end;
        gap: 8px;
        padding-right: 0 !important;
        flex-wrap: wrap;
    }
    
    .btn-v2-login,
    .btn-login,
    .btn-primary {
        padding: 8px 16px;
        font-size: 13px;
        white-space: nowrap;
    }
    
    .btn-primary {
        padding: 8px 14px;
    }
    
    .hero-title {
        font-size: 42px;
    }
    
    .hero-slogan {
        font-size: 24px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-header h2 {
        font-size: 32px;
    }
    
    .intro-content,
    .concepts-grid,
    .advantages-grid,
    .industries-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .ai-workflow {
        flex-direction: column;
        min-width: auto;
    }
    
    .workflow-arrow {
        transform: rotate(90deg);
    }
    
    .ai-demo-visual {
        padding: 30px 20px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn-cta {
        width: 100%;
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .footer-column-wrapper {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .footer-qrcode {
        margin-top: 0;
    }
    
    .modal-content {
        margin: 20% 20px;
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    body .navbar {
        padding: 10px 0 !important;
    }
    
    body .navbar .container {
        padding: 0 12px !important;
        gap: 8px 0 !important;
    }
    
    .nav-brand .logo {
        font-size: 18px;
    }
    
    .nav-brand .logo i {
        font-size: 22px;
    }
    
    .nav-menu {
        gap: 6px;
        padding-top: 6px;
    }
    
    .nav-menu a {
        font-size: 13px;
        padding: 5px 10px;
    }
    
    .nav-actions {
        gap: 6px;
    }
    
    .btn-v2-login,
    .btn-login,
    .btn-primary {
        padding: 7px 12px;
        font-size: 12px;
    }
    
    .btn-primary {
        padding: 7px 10px;
    }
    
    .hero-logo {
        font-size: 60px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-slogan {
        font-size: 20px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .feature-header {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 15px;
    }
    
    .hero-actions .btn-hero,
    .hero-actions .btn-hero-login {
        width: 100%;
        max-width: 280px;
    }
}

/* Hero 徽章 */
.hero-badges {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin: 24px 0;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
}

.badge-free {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
}

.badge-easy {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
}

.badge i {
    font-size: 12px;
}

/* 导航栏徽章 */
.nav-badge-free {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    margin-right: 8px;
}

/* FAQ 区域 */
.faq {
    background: var(--bg-light);
    padding: 80px 0;
}

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

.faq-item {
    background: var(--bg-white);
    border-radius: 12px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.faq-question {
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.faq-question h4 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
}

.faq-question i {
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 24px;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 24px 24px 24px;
}

.faq-answer p {
    margin: 0;
    color: var(--text-light);
    line-height: 1.8;
}

/* 快速入门区域 */
.quick-start {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.quick-start-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.quick-start-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.quick-start-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.quick-start-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.quick-start-card:hover::before {
    transform: scaleX(1);
}

.quick-start-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
    font-size: 36px;
}

.quick-start-card h3 {
    text-align: center;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.quick-start-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 24px;
    font-size: 14px;
}

.quick-start-features {
    list-style: none;
    padding: 0;
    margin: 0 0 30px 0;
}

.quick-start-features li {
    padding: 12px 0;
    color: var(--text-dark);
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.quick-start-features li i {
    color: var(--success-color);
    margin-top: 4px;
    flex-shrink: 0;
}

.btn-quick-start {
    display: block;
    width: 100%;
    text-align: center;
    padding: 14px 24px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-quick-start:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

/* 响应式设计 - 快速入门和 FAQ */
@media (max-width: 768px) {
    .quick-start-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-badges {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-badge-free {
        display: none;
    }
}