/* 头部导航样式 */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: #fff;
    z-index: 999;
    border-bottom: 1px solid #f1f1f1;
}


#header .fr {
    float: right;
}


#header .nav li > a:hover,
#header .nav li > a.active {
    color: #0066ff;
}

/* 移动菜单按钮 */
.mobile-menu-toggle {
    display: none;
}

/* AI系统页面样式 */
.ai-hero {
    position: relative;
    color: #fff;
    padding: 120px 0 80px;
    text-align: center;
    margin-top: 80px;
    overflow: hidden;
}

/* 添加背景动效元素 */
.ai-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(13, 71, 161, 0.4) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(26, 35, 126, 0.4) 0%, transparent 50%);
    z-index: 1;
}

.ai-hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><rect width="1" height="1" fill="rgba(255,255,255,0.05)"/></svg>');
    opacity: 0.5;
    z-index: 2;
}

.ai-hero .container {
    position: relative;
    z-index: 3;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.ai-hero h1 {
    font-size: 56px;
    margin-bottom: 20px;
    font-weight: bold;
    background: linear-gradient(to right, #fff, #e3f2fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.ai-hero .subtitle {
    font-size: 24px;
    margin-bottom: 40px;
    opacity: 0.9;
    font-weight: 300;
    letter-spacing: 1px;
}

.hero-features {
    margin: 50px 0;
}

.hero-features ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.hero-features li {
    margin: 0;
    padding: 12px 30px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 25px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.hero-features li:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.hero-buttons {
    margin-top: 50px;
}

.hero-buttons .btn {
    display: inline-block;
    margin: 0 10px;
    padding: 15px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    font-size: 16px;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(45deg, #2196f3, #1976d2);
    color: #fff;
    border: none;
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(45deg, #1976d2, #1565c0);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(33, 150, 243, 0.4);
}

.btn-secondary {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.8);
    color: #fff;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    border-color: #fff;
}

.features {
    padding: 80px 0;
    background: #f5f5f5;
}

.features h2,
.scenarios h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 36px;
    color: #333;
    font-weight: bold;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    padding: 0 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.feature-card .icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8eb 100%);
    transition: all 0.3s ease;
}

.feature-card .icon i {
    font-size: 32px;
    color: #0db083;
    transition: all 0.3s ease;
}

.feature-card:hover .icon {
    background: linear-gradient(135deg, #0db083 0%, #0a8f69 100%);
    transform: translateY(-5px);
}

.feature-card:hover .icon i {
    color: #fff;
}

.feature-card h3 {
    margin-bottom: 15px;
    color: #333;
    font-size: 20px;
    font-weight: bold;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
    font-size: 15px;
    margin: 0;
}

.scenarios {
    padding: 80px 0;
    background: #fff;
}

.scenario-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    padding: 0 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.scenario-item {
    background: #fff;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.scenario-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.scenario-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.scenario-item h3 {
    margin: 20px 0 10px;
    color: #333;
    font-size: 20px;
    font-weight: bold;
}

.scenario-item p {
    color: #666;
    line-height: 1.6;
    font-size: 15px;
    margin: 0;
    padding: 0 20px;
}

.scenario-item .icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8eb 100%);
    transition: all 0.3s ease;
}

.scenario-item .icon i {
    font-size: 36px;
    color: #0db083;
    transition: all 0.3s ease;
}

.scenario-item:hover .icon {
    background: linear-gradient(135deg, #0db083 0%, #0a8f69 100%);
    transform: translateY(-5px);
}

.scenario-item:hover .icon i {
    color: #fff;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .min { min-width: unset; }
    .wrap, .wrap_1440 { width: 100%; min-width: unset; padding: 0 15px; box-sizing: border-box; }
    
    /* 导航菜单 */
    #header { position: fixed; background: #fff; border-bottom: 1px solid #f1f1f1; width: 100%; z-index: 999; top: 0; left: 0; }
    #header .wrap { height: 60px; position: relative; }
    #header .logo { height: 36px; margin: 12px 0; }
    #header .logo img { height: 100%; }
    
    /* 移动菜单按钮 */
    .mobile-menu-toggle { 
        display: block; 
        position: absolute;
        right: 15px;
        top: 20px;
        width: 30px;
        height: 20px;
        cursor: pointer;
        z-index: 21;
    }
    .mobile-menu-toggle span {
        display: block;
        width: 100%;
        height: 2px;
        background: #333;
        position: absolute;
        transition: all 0.3s;
    }
    .mobile-menu-toggle span:nth-child(1) { top: 0; }
    .mobile-menu-toggle span:nth-child(2) { top: 9px; }
    .mobile-menu-toggle span:nth-child(3) { top: 18px; }
    .mobile-menu-toggle.active span:nth-child(1) { transform: rotate(45deg); top: 9px; }
    .mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
    .mobile-menu-toggle.active span:nth-child(3) { transform: rotate(-45deg); top: 9px; }
    
    /* 导航菜单 */
    #header .fr { position: static; }
    #header .fr.active {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        height: calc(100vh - 60px);
        background: #fff;
        z-index: 990;
        overflow-y: auto;
    }
    #header .nav { float: none; margin: 0; padding: 0; height: auto; display: none; }
    #header .fr.active .nav { display: block; }
    #header .nav li { float: none; margin: 0; padding: 0; border-bottom: 1px solid #f1f1f1; }
    #header .nav li > a { display: block; height: 50px; line-height: 50px; font-size: 16px; padding: 0 15px; }
    
    .ai-hero {
        padding: 100px 0 60px;
        margin-top: 60px;
    }
    
    .ai-hero h1 {
        font-size: 36px;
    }

    .ai-hero .subtitle {
        font-size: 18px;
        margin-bottom: 30px;
    }

    .hero-features {
        margin: 30px 0;
    }

    .hero-features ul {
        gap: 10px;
    }

    .hero-features li {
        padding: 10px 20px;
        font-size: 14px;
    }

    .hero-buttons {
        margin-top: 30px;
    }

    .hero-buttons .btn {
        padding: 12px 30px;
        font-size: 15px;
    }

    .feature-grid,
    .scenario-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 15px;
    }

    .feature-card,
    .scenario-item {
        padding: 30px 20px;
    }

    .feature-card .icon {
        width: 60px;
        height: 60px;
        padding: 15px;
    }

    .feature-card h3,
    .scenario-item h3 {
        font-size: 18px;
    }

    .feature-card p,
    .scenario-item p {
        font-size: 14px;
    }

    .features h2,
    .scenarios h2 {
        font-size: 28px;
        margin-bottom: 30px;
    }
}

@media (max-width: 480px) {
    .ai-hero h1 {
        font-size: 32px;
    }

    .ai-hero .subtitle {
        font-size: 16px;
    }

    .hero-buttons .btn {
        display: block;
        margin: 10px auto;
        width: 80%;
        max-width: 280px;
    }
}