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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #000000;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
}

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

/* 导航栏 */
.navbar {
    position: static;
    z-index: 1000;
    width: 100%;
    margin: 0;
    padding: 0;
}

.logo-header {
    background-color: #000000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    width: 100%;
    margin: 0;
    padding: 0;
}

.logo-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo-link {
    text-decoration: none;
    display: inline-block;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1001;
    background-color: #000000;
}

.logo img {
    height: 30px;
    width: auto;
    display: inline-block;
}

.logo i {
    font-size: 24px;
    color: #e63946;
    display: inline-block;
}

.logo h1, .logo h2 {
    font-size: 24px;
    font-weight: 700;
    color: #F44336;
    display: inline-block;
    margin: 0;
    line-height: 1;
    z-index: 1002;
}

.nav-actions {
    display: flex;
    align-items: center;
}

.btn-primary {
    background-color: #e63946;
    color: #fff;
    padding: 8px 16px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s ease;
    font-size: 14px;
}

.btn-primary:hover {
    background-color: #c1121f;
    color: #fff;
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.9);
    color: #e63946;
    padding: 8px 16px;
    border: 1px solid #e63946;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    font-size: 14px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
    background-color: #e63946;
    color: #fff;
    border-color: #e63946;
}

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

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

/* Hero 区域 */
.hero {
    background: linear-gradient(135deg, #000000, #e63946);
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background-color: rgba(255,255,255,0.15);
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 12px;
    margin-bottom: 16px;
}

.hero h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.1;
    color: #F44336;
}

.hero-subtitle {
    font-size: 16px;
    margin-bottom: 24px;
    opacity: 0.9;
}

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

/* 产品特点 */
.features {
    padding: 80px 0;
    background-color: #f9f9f9;
}

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

.feature-item {
    display: flex;
    gap: 16px;
    padding: 16px;
    border-radius: 8px;
    background-color: #fff;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.08);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background-color: #ffe5e5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon i {
    font-size: 20px;
    color: #e63946;
}

.feature-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #000000;
}

.feature-content p {
    color: #666;
    font-size: 13px;
    line-height: 1.5;
}

/* 操作流程 */
.process {
    padding: 80px 0;
    background-color: #fff;
}

.process h2,
.features h2 {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
    color: #000000;
}

.process-steps {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
}

.process-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 280px;
}

.step-number {
    width: 50px;
    height: 50px;
    background-color: #e63946;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.step-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #000000;
}

.step-content p {
    color: #666;
    font-size: 13px;
    line-height: 1.5;
}

/* 功能展示 */
.use-cases {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.use-cases h2 {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
    color: #333;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.use-case-item {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e8e8e8;
}

.use-case-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.08);
}

.use-case-content {
    padding: 24px;
}

.use-case-query {
    background-color: #ffe5e5;
    padding: 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-weight: 500;
    color: #000000;
    font-size: 14px;
}

.use-case-response {
    margin-bottom: 16px;
}

.response-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 8px;
    padding: 8px;
    background-color: #f9f9f9;
    border-radius: 4px;
}

.response-icon {
    font-size: 16px;
    flex-shrink: 0;
}

.response-text {
    color: #333;
    font-size: 13px;
    line-height: 1.4;
}

.use-case-tags {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.tag {
    font-size: 11px;
    color: #666;
    line-height: 1.4;
}

/* 流量来源分析 */
.traffic-sources {
    padding: 80px 0;
    background-color: #fff;
}

.traffic-sources h2 {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
    color: #000000;
}

.traffic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.traffic-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    border-radius: 8px;
    background-color: #f9f9f9;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.traffic-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.08);
}

.traffic-icon {
    width: 50px;
    height: 50px;
    background-color: #ffe5e5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.traffic-icon i {
    font-size: 20px;
    color: #e63946;
}

.traffic-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #000000;
}

.traffic-content ul {
    list-style: none;
}

.traffic-content ul li {
    margin-bottom: 6px;
    color: #666;
    font-size: 13px;
    line-height: 1.4;
}

.traffic-content ul li:before {
    content: "•";
    color: #e63946;
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

/* 用户需求分析 */
.user-needs {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.user-needs h2 {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
    color: #000000;
}

.needs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.needs-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    border-radius: 8px;
    background-color: #fff;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e8e8e8;
}

.needs-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.08);
}

.needs-icon {
    width: 50px;
    height: 50px;
    background-color: #ffe5e5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.needs-icon i {
    font-size: 20px;
    color: #e63946;
}

.needs-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #000000;
}

.needs-content ul {
    list-style: none;
}

.needs-content ul li {
    margin-bottom: 6px;
    color: #666;
    font-size: 13px;
    line-height: 1.4;
}

.needs-content ul li:before {
    content: "•";
    color: #e63946;
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

/* 底部 CTA */
.cta {
    background: linear-gradient(135deg, #000000, #e63946);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.cta h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.1;
    color: #F44336;
}

.cta p {
    font-size: 16px;
    margin-bottom: 24px;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta .btn-secondary {
    background-color: rgba(255, 255, 255, 0.9);
    color: #e63946;
    border: 1px solid #e63946;
}

.cta .btn-secondary:hover {
    background-color: #e63946;
    color: #fff;
    border-color: #e63946;
}

/* 页脚 */
.footer {
    background-color: #000000;
    color: #ffffff;
    padding: 48px 0 24px;
    border-top: 1px solid #333333;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

.footer-item h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    color: #ffffff;
}

.footer-item p {
    color: #cccccc;
    margin-bottom: 16px;
    font-size: 13px;
}

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

.footer-item ul li {
    margin-bottom: 8px;
}

.footer-item ul li a {
    text-decoration: none;
    color: #cccccc;
    transition: color 0.3s ease;
    font-size: 13px;
}

.footer-item ul li a:hover {
    color: #e63946;
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid #333333;
    color: #999999;
    font-size: 12px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 36px;
    }
    
    .process-steps {
        flex-direction: column;
        align-items: center;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons,
    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 80px 0;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .features,
    .process,
    .use-cases,
    .cta {
        padding: 60px 0;
    }
    
    .process h2,
    .use-cases h2,
    .cta h2 {
        font-size: 24px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .use-case-content {
        padding: 20px;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 24px;
    }
    
    .process h2,
    .use-cases h2,
    .cta h2 {
        font-size: 20px;
    }
    
    .feature-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.5s ease forwards;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #e63946;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #c1121f;
}