/* 悦灵陪伴机器人官网样式 - 专为老年群体优化 */

/* 基础重置和字体设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'SimHei', 'PingFang SC', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 18px;
    line-height: 1.6;
    color: #1a202c;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    min-height: 100vh;
}

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

/* 导航栏样式 */
.navbar {
    background: rgba(26, 32, 44, 0.95);
    backdrop-filter: blur(20px);
    padding: 15px 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

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

.nav-brand h1 {
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

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

.nav-link {
    color: #ffffff;
    text-decoration: none;
    font-size: 20px;
    padding: 10px 15px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.nav-link:hover {
    background-color: #2c3e50;
}

.consultation-btn {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(238, 90, 36, 0.4);
    transition: all 0.3s ease;
}

.consultation-btn:hover {
    background: linear-gradient(135deg, #ff5252, #e53935);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(238, 90, 36, 0.6);
}

/* 主要内容区域 */
main {
    margin-top: 80px;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(248,250,252,0.95) 100%);
    backdrop-filter: blur(10px);
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    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 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.5" fill="%23667eea" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

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

.hero-text h2 {
    font-size: 56px;
    background: linear-gradient(135deg, #1a202c, #2d3748);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 24px;
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 26px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 24px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.hero-description {
    font-size: 20px;
    color: #555;
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    padding: 15px 30px;
    font-size: 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5a67d8, #6b46c1);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
    background: rgba(255,255,255,0.9);
    color: #667eea;
    border: 2px solid #667eea;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.robot-placeholder {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-radius: 30px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,0.1), 0 0 0 1px rgba(255,255,255,0.5);
    border: none;
    transition: all 0.3s ease;
}

.robot-placeholder:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 30px 80px rgba(0,0,0,0.15), 0 0 0 1px rgba(255,255,255,0.8);
}

.robot-icon {
    margin-bottom: 25px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.robot-placeholder p {
    font-size: 22px;
    color: #3498db;
    font-weight: 600;
}

/* 功能区域 */
.features {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(248,250,252,0.95) 100%);
    backdrop-filter: blur(10px);
    position: relative;
}

.features::before {
    content: '';
    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 0 200 200"><defs><pattern id="dots" width="40" height="40" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="1" fill="%23667eea" opacity="0.1"/></pattern></defs><rect width="200" height="200" fill="url(%23dots)"/></svg>');
    pointer-events: none;
}

.section-title {
    font-size: 48px;
    text-align: center;
    color: #1a202c;
    margin-bottom: 80px;
    font-weight: 800;
    letter-spacing: -1px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

.safety .section-title {
    color: white;
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-card {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    padding: 50px 40px;
    border-radius: 25px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,0.08), 0 0 0 1px rgba(255,255,255,0.5);
    border: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2, #f093fb, #f5576c);
    background-size: 400% 100%;
    animation: gradientShift 3s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.feature-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 40px 100px rgba(0,0,0,0.12), 0 0 0 1px rgba(255,255,255,0.8);
}

.feature-icon {
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    filter: drop-shadow(0 4px 20px rgba(102, 126, 234, 0.3));
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotateY(10deg);
    filter: drop-shadow(0 8px 30px rgba(102, 126, 234, 0.4));
}

.feature-card h3 {
    font-size: 26px;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.feature-card p {
    font-size: 18px;
    color: #555;
    line-height: 1.7;
}

/* 安全保障区域 */
.safety {
    padding: 100px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    color: white;
}

.safety::before {
    content: '';
    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 0 100 100"><defs><pattern id="hexagon" width="50" height="43.4" patternUnits="userSpaceOnUse"><polygon points="25,0 50,14.4 50,28.9 25,43.4 0,28.9 0,14.4" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23hexagon)"/></svg>');
    pointer-events: none;
}

.safety-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.safety-item {
    text-align: center;
    padding: 40px 30px;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.2);
    transition: all 0.3s ease;
}

.safety-item:hover {
    transform: translateY(-10px);
    background: rgba(255,255,255,0.15);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.safety-item h3 {
    font-size: 26px;
    color: white;
    margin-bottom: 20px;
    font-weight: 600;
}

.safety-item p {
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    line-height: 1.7;
}

/* 用户反馈区域 */
.testimonials {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(248,250,252,0.95) 100%);
    backdrop-filter: blur(10px);
    position: relative;
}

.testimonials::before {
    content: '';
    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 60 60"><defs><pattern id="quote" width="30" height="30" patternUnits="userSpaceOnUse"><path d="M5 15 Q10 10 15 15 Q10 20 5 15" fill="%23667eea" opacity="0.05"/></pattern></defs><rect width="60" height="60" fill="url(%23quote)"/></svg>');
    pointer-events: none;
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.testimonial-card {
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(20px);
    padding: 40px 35px;
    border-radius: 25px;
    border: none;
    border-left: 5px solid transparent;
    background-image: linear-gradient(rgba(255,255,255,0.9), rgba(255,255,255,0.9)), linear-gradient(135deg, #667eea, #764ba2);
    background-origin: border-box;
    background-clip: content-box, border-box;
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
    transition: all 0.4s ease;
    position: relative;
}

.testimonial-card::before {
    content: '“';
    position: absolute;
    top: 15px;
    left: 25px;
    font-size: 60px;
    color: #667eea;
    opacity: 0.3;
    font-family: serif;
    line-height: 1;
}

.testimonial-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 30px 80px rgba(0,0,0,0.12);
}

.testimonial-card p {
    font-size: 20px;
    color: #1a202c;
    font-style: italic;
    margin-bottom: 25px;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    font-size: 16px;
    color: #667eea;
    font-weight: 600;
    text-align: right;
}

/* 咨询区域 */
.consultation {
    padding: 100px 0;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    position: relative;
    color: white;
}

.consultation::before {
    content: '';
    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 0 100 100"><defs><pattern id="consultation" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1.5" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23consultation)"/></svg>');
    pointer-events: none;
}

.consultation .section-title {
    color: white;
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.consultation-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 40px;
}

.consultation-info h3 {
    font-size: 32px;
    color: white;
    margin-bottom: 25px;
    font-weight: 700;
}

.consultation-info p {
    font-size: 22px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 35px;
    line-height: 1.6;
}

.consultation-benefits {
    list-style: none;
}

.consultation-benefits li {
    font-size: 20px;
    color: white;
    margin-bottom: 15px;
    font-weight: 600;
    position: relative;
    padding-left: 10px;
}

.consultation-form {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    padding: 50px 45px;
    border-radius: 25px;
    box-shadow: 0 30px 80px rgba(0,0,0,0.15);
    border: 1px solid rgba(255,255,255,0.3);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 18px;
    color: #2c3e50;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 18px 20px;
    font-size: 16px;
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 12px;
    transition: all 0.3s ease;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(10px);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    background: white;
}

/* 联系我们区域 */
.contact {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(248,250,252,0.95) 100%);
    backdrop-filter: blur(10px);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 25px;
    padding: 40px 35px;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(20px);
    border-radius: 25px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
    border: 1px solid rgba(255,255,255,0.5);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 30px 80px rgba(0,0,0,0.12);
    background: rgba(255,255,255,0.9);
}

.contact-icon {
    font-size: 40px;
}

.contact-details h3 {
    font-size: 24px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.contact-details p {
    font-size: 18px;
    color: #555;
    margin-bottom: 5px;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
    color: white;
    padding: 80px 0 30px;
    position: relative;
}

.footer::before {
    content: '';
    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 0 100 100"><defs><pattern id="footerPattern" width="40" height="40" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="1" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23footerPattern)"/></svg>');
    pointer-events: none;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    font-size: 20px;
}

.footer-section a {
    display: block;
    color: #bdc3c7;
    text-decoration: none;
    margin-bottom: 10px;
    font-size: 16px;
}

.footer-section a:hover {
    color: #3498db;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 15px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-text h2 {
        font-size: 36px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .consultation-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    body {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 32px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-text h2 {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .hero-description {
        font-size: 18px;
    }
    
    .btn {
        padding: 12px 20px;
        font-size: 18px;
    }
    
    .robot-icon {
        font-size: 80px;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    .consultation-form {
        padding: 30px 20px;
    }
}

/* 可访问性增强 */
.btn:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 3px solid #3498db;
    outline-offset: 2px;
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    body {
        color: #000000;
        background-color: #ffffff;
    }
    
    .navbar {
        background-color: #000000;
    }
    
    .feature-card,
    .consultation-form {
        border: 2px solid #000000;
    }
}