/* 全局基础样式 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;600;700;800;900&display=swap');

:root {
    --primary-blue: #3b82f6;
    --primary-blue-dark: #1d4ed8;
    --primary-blue-light: #dbeafe;
    --primary-blue-lighter: #eff6ff;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
}

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

body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    font-size: 16px;
    font-weight: 400;
}

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

.section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.section-title p {
    font-size: 1.1rem;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* 导航栏样式 */
.navbar {
    background: #ffffff;
    box-shadow: 0 2px 20px rgba(59, 130, 246, 0.1);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid #e5e7eb;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #3b82f6;
    text-decoration: none;
    transition: transform 0.3s ease;
    white-space: nowrap;
}

.logo:hover {
    transform: scale(1.05);
    text-decoration: none;
    color: #3b82f6;
}

.logo i {
    margin-right: 8px;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-item a {
    color: #1f2937;
    text-decoration: none;
    font-weight: 500;
    padding: 10px 15px;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
    display: block;
    white-space: nowrap;
}

.nav-item a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: #3b82f6;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-item a:hover,
.nav-item a.active {
    color: #3b82f6;
    text-decoration: none;
}

.nav-item a:hover::before,
.nav-item a.active::before {
    width: 80%;
}

.nav-cta {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8) !important;
    color: #ffffff !important;
    padding: 12px 25px !important;
    border-radius: 25px !important;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3) !important;
    transition: all 0.3s ease !important;
}

.nav-cta:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4) !important;
    color: #ffffff !important;
    text-decoration: none !important;
}

.nav-cta::before {
    display: none !important;
}

/* 移动端导航菜单切换 */
.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 8px;
    border: none;
    background: none;
    z-index: 1001;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #3b82f6;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
    display: block;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Hero区域 */
.hero {
    background: linear-gradient(135deg, var(--primary-blue-lighter) 0%, var(--primary-blue-light) 100%);
    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 1000 1000"><defs><radialGradient id="g" cx="50%" cy="50%"><stop offset="0%" stop-color="%233b82f6" stop-opacity="0.1"/><stop offset="100%" stop-color="%233b82f6" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="300" fill="url(%23g)"/><circle cx="800" cy="800" r="400" fill="url(%23g)"/></svg>');
    opacity: 0.5;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-text .highlight {
    color: var(--primary-blue);
    position: relative;
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 30px;
    line-height: 1.8;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    padding: 15px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    color: var(--white);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(59, 130, 246, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.btn-outline:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.btn i {
    margin-right: 8px;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(59, 130, 246, 0.2);
    transition: transform 0.3s ease;
}

.hero-image:hover img {
    transform: scale(1.02);
}

/* 统计数据 */
.stats {
    background: var(--white);
    padding: 60px 0;
    margin-top: -40px;
    position: relative;
    z-index: 3;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    background: var(--white);
    padding: 40px 20px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.1);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-200);
}

.stat-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.15);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: 10px;
    line-height: 1;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-gray);
    font-weight: 500;
}

/* 关于我们 */
.about {
    background: var(--gray-50);
}

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

.about-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-gray);
    margin-bottom: 25px;
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-features {
    list-style: none;
    margin: 30px 0;
}

.about-features li {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    color: var(--text-gray);
    font-size: 1rem;
}

.about-features li i {
    color: var(--success);
    margin-right: 15px;
    font-size: 1.2rem;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: 15px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

/* 服务项目 */
.services {
    background: var(--white);
}

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

.service-card {
    background: var(--white);
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(59, 130, 246, 0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-blue-light), var(--primary-blue-lighter));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    transition: all 0.3s ease;
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    transform: scale(1.1);
}

.service-icon i {
    font-size: 2rem;
    color: var(--primary-blue);
    transition: color 0.3s ease;
}

.service-card:hover .service-icon i {
    color: var(--white);
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.service-card p {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 25px;
}

.service-features {
    list-style: none;
    margin-bottom: 25px;
}

.service-features li {
    color: var(--text-gray);
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* 专家团队 */
.doctors {
    background: var(--gray-50);
}

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

.doctor-card {
    background: var(--white);
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.doctor-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.doctor-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 20px;
    overflow: hidden;
    border: 4px solid var(--primary-blue-light);
    transition: all 0.3s ease;
}

.doctor-card:hover .doctor-photo {
    border-color: var(--primary-blue);
    transform: scale(1.05);
}

.doctor-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.doctor-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.doctor-title {
    color: var(--primary-blue);
    font-weight: 500;
    margin-bottom: 10px;
}

.doctor-department {
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.doctor-specialties {
    list-style: none;
    margin-bottom: 20px;
}

.doctor-specialties li {
    background: var(--primary-blue-lighter);
    color: var(--primary-blue);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    margin: 5px;
    display: inline-block;
}

/* 设备环境 */
.equipment {
    background: var(--white);
}

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

.equipment-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-200);
}

.equipment-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.equipment-image {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.equipment-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.equipment-card:hover .equipment-image img {
    transform: scale(1.1);
}

.equipment-content {
    padding: 25px;
}

.equipment-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.equipment-content p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* 成功案例 */
.cases {
    background: var(--gray-50);
}

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

.case-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.case-image {
    height: 250px;
    overflow: hidden;
    position: relative;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.case-card:hover .case-image img {
    transform: scale(1.05);
}

.case-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--primary-blue);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.case-content {
    padding: 25px;
}

.case-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.case-meta {
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.case-content p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* 新闻资讯 */
.news {
    background: var(--white);
}

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

.news-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-200);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.news-image {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.news-card:hover .news-image img {
    transform: scale(1.05);
}

.news-category {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--primary-blue);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.news-content {
    padding: 25px;
}

.news-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
    line-height: 1.4;
}

.news-content p {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 15px;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 价格套餐 */
.pricing {
    background: var(--gray-50);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--white);
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid var(--gray-200);
    position: relative;
}

.pricing-card.popular {
    border-color: var(--primary-blue);
    transform: scale(1.05);
}

.pricing-card.popular::before {
    content: '推荐';
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-blue);
    color: var(--white);
    padding: 8px 25px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.pricing-card.popular:hover {
    transform: translateY(-10px) scale(1.05);
}

.pricing-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.pricing-price {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: 5px;
}

.pricing-unit {
    color: var(--text-gray);
    margin-bottom: 30px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-features li {
    padding: 8px 0;
    color: var(--text-gray);
    border-bottom: 1px solid var(--gray-200);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li i {
    color: var(--success);
    margin-right: 10px;
}

/* FAQ */
.faq {
    background: var(--white);
}

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

.faq-item {
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.faq-question {
    background: var(--gray-50);
    padding: 20px 25px;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background: var(--primary-blue-lighter);
    color: var(--primary-blue);
}

.faq-question i {
    transition: transform 0.3s ease;
}

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

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 20px 25px;
    max-height: 200px;
}

.faq-answer p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* 患者评价 */
.testimonials {
    background: var(--gray-50);
}

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

.testimonial-card {
    background: var(--white);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 25px;
    font-size: 4rem;
    color: var(--primary-blue-light);
    line-height: 1;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.testimonial-content {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-footer {
    display: flex;
    align-items: center;
    gap: 15px;
}

.testimonial-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--primary-blue-light);
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.testimonial-info p {
    color: var(--text-gray);
    font-size: 0.9rem;
}

.testimonial-rating {
    margin-left: auto;
    color: var(--warning);
}

/* 联系我们 */
.contact {
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-blue-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
}

.contact-icon i {
    color: var(--primary-blue);
    font-size: 1.2rem;
}

.contact-details h4 {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.contact-details p {
    color: var(--text-gray);
}

.contact-form {
    background: var(--gray-50);
    padding: 40px;
    border-radius: 15px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    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: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-section p,
.footer-section li {
    color: var(--gray-200);
    line-height: 1.6;
    margin-bottom: 10px;
}

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

.footer-section a {
    color: var(--gray-200);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--primary-blue-light);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--primary-blue-light);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 20px;
    text-align: center;
    color: var(--gray-200);
}

/* 工具类 */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-10 { margin-bottom: 10px; }
.mb-20 { margin-bottom: 20px; }
.mb-30 { margin-bottom: 30px; }

.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mt-30 { margin-top: 30px; }

.hidden { display: none; }
.visible { display: block; }

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-200);
    border-radius: 50%;
    border-top-color: var(--primary-blue);
    animation: spin 1s ease-in-out infinite;
}

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

/* 消息提示 */
.message {
    padding: 15px 20px;
    border-radius: 8px;
    margin: 20px 0;
    font-weight: 500;
}

.message.success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.message.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.message.warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fcd34d;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .hero {
        padding: 100px 0 60px;
        text-align: center;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    /* 移动端导航菜单样式 */
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 76px;
        flex-direction: column;
        background-color: #ffffff;
        width: 100%;
        text-align: center;
        transition: left 0.3s ease;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        border-radius: 0 0 20px 20px;
        padding: 20px 0;
        gap: 0;
        z-index: 999;
        border-top: 1px solid #e5e7eb;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        margin: 10px 0;
    }
    
    .nav-item a {
        padding: 15px 20px;
        display: block;
        border-radius: 10px;
        margin: 0 20px;
        font-size: 1.1rem;
    }
    
    .nav-item a::before {
        display: none;
    }
    
    .nav-cta {
        margin: 10px 20px !important;
        text-align: center !important;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .services-grid,
    .doctors-grid,
    .equipment-grid,
    .cases-grid,
    .news-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.popular {
        transform: none;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}