/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --light-color: #f8fafc;
    --dark-color: #1e293b;
    --gray-color: #64748b;
    --light-gray: #e2e8f0;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --white: #ffffff;
    --black: #000000;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 8px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--white);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-full {
    width: 100%;
    text-align: center;
}

.section-title {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.section-subtitle {
    text-align: center;
    color: var(--gray-color);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* 导航栏 */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    margin-right: 10px;
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-menu li a {
    font-weight: 500;
    color: var(--dark-color);
    position: relative;
}

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

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

.nav-menu li a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.nav-cta a {
    background-color: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border-radius: var(--radius);
}

.nav-cta a:hover {
    background-color: var(--secondary-color);
    color: white;
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--dark-color);
    transition: var(--transition);
}

/* 英雄区域 */
.hero {
    background: linear-gradient(rgba(30, 64, 175, 0.9), rgba(37, 99, 235, 0.9));
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    color: white;
}

.hero p {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto 3rem;
    color: rgba(255, 255, 255, 0.9);
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 3rem;
    margin-top: 3rem;
}

.stat {
    text-align: center;
}

.stat h3 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: white;
}

.stat p {
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

/* 服务区域 */
.services {
    padding: 6rem 0;
    background-color: var(--light-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--white);
    padding: 2.5rem 2rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 70px;
    height: 70px;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--primary-color);
    font-size: 1.8rem;
}

.service-card h3 {
    margin-bottom: 1rem;
}

/* 定价区域 */
.pricing {
    padding: 6rem 0;
}

.pricing-table {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.price-column {
    background-color: var(--white);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow);
    position: relative;
    transition: var(--transition);
}

.price-column:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.price-column.popular {
    border: 2px solid var(--primary-color);
}

.price-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary-color);
    color: white;
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.price-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--light-gray);
}

.price-header h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.price span {
    font-size: 1rem;
    color: var(--gray-color);
}

.price-features {
    margin-bottom: 2rem;
}

.price-features li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.price-features li:before {
    content: "✓";
    color: var(--success-color);
    font-weight: bold;
    margin-right: 10px;
}

.pricing-cta {
    text-align: center;
}

.pricing-cta a {
    color: var(--primary-color);
    font-weight: 500;
}

/* 客户评价 */
.testimonials {
    padding: 6rem 0;
    background-color: var(--light-color);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.testimonial-content {
    margin-bottom: 1.5rem;
    font-style: italic;
    color: var(--dark-color);
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.testimonial-author div {
    margin-left: 1rem;
}

.testimonial-author h4 {
    margin-bottom: 0.2rem;
}

.testimonial-author p {
    color: var(--gray-color);
    margin: 0;
    font-size: 0.9rem;
}

/* CTA区域 */
.cta {
    padding: 6rem 0;
    background: linear-gradient(rgba(37, 99, 235, 0.9), rgba(30, 64, 175, 0.9));
    color: white;
    text-align: center;
}

.cta h2 {
    color: white;
    margin-bottom: 1rem;
}

.cta p {
    max-width: 700px;
    margin: 0 auto 2rem;
    color: rgba(255, 255, 255, 0.9);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* 页脚 */
.footer {
    background-color: var(--dark-color);
    color: var(--light-gray);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h3 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.footer-col ul li {
    margin-bottom: 0.8rem;
}

.footer-col ul li a:hover {
    color: var(--primary-color);
}

.contact-info li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.contact-info li i {
    margin-right: 10px;
    color: var(--primary-color);
    margin-top: 5px;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom a {
    color: var(--primary-color);
}

.footer-bottom a:hover {
    text-decoration: underline;
}

/* 页面标题 */
.page-header {
    background-color: var(--light-color);
    padding: 4rem 0;
    text-align: center;
}

.page-header h1 {
    margin-bottom: 1rem;
}

.page-header p {
    color: var(--gray-color);
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
}

/* 服务详情 */
.services-detail {
    padding: 6rem 0;
}

.service-detail {
    display: flex;
    align-items: center;
    gap: 4rem;
    margin-bottom: 6rem;
}

.service-detail.reverse {
    flex-direction: row-reverse;
}

.service-detail-content {
    flex: 1;
}

.service-detail-image {
    flex: 1;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--light-color);
}

.image-placeholder {
    text-align: center;
    color: var(--primary-color);
    padding: 2rem;
}

.image-placeholder i {
    font-size: 5rem;
    margin-bottom: 1rem;
}

.image-placeholder p {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--dark-color);
}

.service-detail h2 {
    margin-bottom: 1.5rem;
}

.service-detail ul {
    margin: 1.5rem 0 2rem;
}

.service-detail ul li {
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
}

.service-detail ul li:before {
    content: "•";
    color: var(--primary-color);
    font-size: 1.5rem;
    position: absolute;
    left: 0;
    top: -5px;
}

/* 关于我们 */
.about-intro {
    padding: 6rem 0;
}

.about-content {
    max-width: 800px;
    margin: 0 auto 4rem;
}

.about-content h2 {
    text-align: center;
    margin-bottom: 2rem;
}

.mission-vision {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.mission, .vision {
    background-color: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.mission h3, .vision h3 {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.mission h3 i, .vision h3 i {
    margin-right: 10px;
    color: var(--primary-color);
}

/* 价值观 */
.values {
    padding: 6rem 0;
    background-color: var(--light-color);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.value-card {
    background-color: var(--white);
    padding: 2.5rem 2rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.value-icon {
    width: 70px;
    height: 70px;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--primary-color);
    font-size: 1.8rem;
}

/* 联系信息 */
.contact-info-section {
    padding: 4rem 0;
    background-color: var(--light-color);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    width: 70px;
    height: 70px;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--primary-color);
    font-size: 1.8rem;
}

/* 联系表单 */
.contact-form-section {
    padding: 6rem 0;
}

.contact-form-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 4rem;
}

.contact-form-container h2, .contact-map-container h2 {
    margin-bottom: 1rem;
}

.contact-form-container p {
    color: var(--gray-color);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--light-gray);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: 'Roboto', sans-serif;
    outline: none;
    transition: var(--transition);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary-color);
}

.form-message {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: var(--radius);
    display: none;
}

.form-message.loading {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(37, 99, 235, 0.3);
}

.form-message.success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.form-message.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.map-placeholder {
    background-color: var(--light-color);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    text-align: center;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.map-placeholder i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-extra-info {
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.emergency-phone {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--danger-color);
    margin: 1rem 0;
}

.emergency-phone i {
    margin-right: 10px;
}

/* FAQ */
.faq {
    padding: 6rem 0;
    background-color: var(--light-color);
}

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

.faq-item {
    background-color: var(--white);
    border-radius: var(--radius);
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.faq-question h3 {
    margin: 0;
    font-size: 1.2rem;
}

.faq-question i {
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    padding-bottom: 1.5rem;
    margin: 0;
}

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

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

/* 响应式设计 */
@media (max-width: 992px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .hero h1 {
        font-size: 2.8rem;
    }
    
    .service-detail, .service-detail.reverse {
        flex-direction: column;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: block;
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow);
        padding: 2rem 0;
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 1rem 0;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .hero-stats {
        gap: 2rem;
    }
    
    .stat h3 {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .hero {
        padding: 4rem 0;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .services, .pricing, .testimonials, .cta {
        padding: 4rem 0;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons a {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
}