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

body {
    font-family: 'Noto Sans SC', 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    scroll-behavior: smooth;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    text-align: center;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #3498db, #2c3e50);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2980b9, #1a2530);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(52, 152, 219, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #3498db;
    border-color: #3498db;
}

.btn-secondary:hover {
    background: #3498db;
    color: white;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: #3498db;
    border: 2px solid #3498db;
}

.btn-outline:hover {
    background: #3498db;
    color: white;
}

.btn-tertiary {
    background: rgba(52, 152, 219, 0.1);
    color: #3498db;
    border: 2px solid rgba(52, 152, 219, 0.3);
}

.btn-tertiary:hover {
    background: rgba(52, 152, 219, 0.2);
    transform: translateY(-2px);
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo h2 {
    color: #2c3e50;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo i {
    color: #3498db;
    margin-right: 10px;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
}

.nav-menu li {
    margin-left: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 8px 12px;
    border-radius: 4px;
    position: relative;
}

.nav-menu a:hover {
    color: #3498db;
    background: rgba(52, 152, 219, 0.1);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #3498db;
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-buttons {
    display: flex;
    align-items: center;
    gap: 15px;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    margin-left: 15px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 首页横幅 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 150px 0 100px;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-text h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-text h1 .highlight {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
}

.cta-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.trust-indicators {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.indicator {
    display: flex;
    align-items: center;
    gap: 8px;
}

.indicator i {
    color: #ffd700;
    font-size: 1.2rem;
}

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

.hero-image img {
    width: 100%;
    max-width: 500px;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* 章节标题 */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
    font-weight: 700;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* 服务部分 */
.services {
    padding: 120px 0;
    background: #f8f9fa;
}

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

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

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #3498db, #2c3e50);
    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 40px rgba(0,0,0,0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3498db, #2c3e50);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 2rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #2c3e50;
    font-weight: 600;
}

.service-card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.service-features {
    list-style: none;
    margin-bottom: 20px;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    color: #27ae60;
    font-size: 0.9rem;
}

.service-features li i {
    color: #27ae60;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: #3498db;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.service-link:hover {
    color: #2980b9;
}

/* 特色优势 */
.features {
    padding: 120px 0;
    background: white;
}

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

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.feature-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    width: 70px;
    height: 70px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon i {
    color: white;
    font-size: 1.8rem;
}

.feature-content h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #2c3e50;
    font-weight: 600;
}

.feature-content p {
    color: #666;
    margin-bottom: 15px;
    line-height: 1.6;
}

.feature-stats {
    display: flex;
    gap: 20px;
    margin: 15px 0;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #3498db;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
}

.tech-stack {
    display: flex;
    gap: 10px;
    margin: 15px 0;
    flex-wrap: wrap;
}

.tech-tag {
    background: #e3f2fd;
    color: #1976d2;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.feature-list {
    list-style: none;
    margin: 15px 0;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    color: #2c3e50;
}

.feature-list li i {
    color: #27ae60;
    font-size: 0.9rem;
}

.security-certifications {
    display: flex;
    gap: 10px;
    margin: 15px 0;
    flex-wrap: wrap;
}

.cert-badge {
    background: #4caf50;
    color: white;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.cost-savings {
    display: flex;
    gap: 20px;
    margin: 15px 0;
}

.saving-item {
    text-align: center;
}

.saving-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: #4caf50;
}

.saving-desc {
    font-size: 0.8rem;
    color: #666;
}

/* 费用计算器 */
.calculator {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.calc-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

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

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

.form-group select,
.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group select:focus,
.form-group input:focus {
    outline: none;
    border-color: #3498db;
}

.calc-btn {
    width: 100%;
    padding: 15px;
    font-size: 1.1rem;
}

.calc-result h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: #2c3e50;
    text-align: center;
}

.result-display {
    text-align: center;
    margin-bottom: 20px;
}

.result-amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: #3498db;
    display: block;
    margin-bottom: 10px;
}

.result-display p {
    font-size: 0.9rem;
    color: #666;
}

.cost-breakdown {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
}

.cost-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #e1e8ed;
}

.cost-item:last-child {
    border-bottom: none;
    font-weight: 600;
    color: #2c3e50;
}

/* 成功案例 */
.cases {
    padding: 120px 0;
    background: #f8f9fa;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.case-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.case-card:hover {
    transform: translateY(-5px);
}

.case-image {
    height: 200px;
    overflow: hidden;
}

.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-content {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.case-category {
    background: #3498db;
    color: white;
    display: inline-block;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    margin-bottom: 15px;
    align-self: flex-start;
}

.case-content h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #2c3e50;
    font-weight: 600;
}

.case-content p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
    flex-grow: 1;
}

.case-stats {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.stat-item {
    text-align: center;
    flex: 1;
    min-width: 100px;
}

.stat-item i {
    color: #3498db;
    font-size: 1.2rem;
    margin-bottom: 5px;
    display: block;
}

.stat-item strong {
    display: block;
    font-size: 1.1rem;
    color: #2c3e50;
    font-weight: 700;
}

.stat-item span {
    font-size: 0.8rem;
    color: #666;
}

.case-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: #3498db;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
    margin-top: auto;
}

.case-link:hover {
    color: #2980b9;
}

/* 价格方案 */
.pricing {
    padding: 120px 0;
    background: white;
}

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

.pricing-card {
    background: white;
    border: 2px solid #e1e8ed;
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.pricing-card.popular {
    border-color: #3498db;
    transform: scale(1.05);
    box-shadow: 0 20px 40px rgba(52, 152, 219, 0.2);
}

.pricing-card.popular::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #3498db, #2c3e50);
}

.popular-badge {
    position: absolute;
    top: -10px;
    right: -30px;
    background: #3498db;
    color: white;
    padding: 5px 30px;
    transform: rotate(45deg);
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #2c3e50;
    font-weight: 600;
}

.price {
    margin: 15px 0;
}

.amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: #3498db;
}

.unit {
    font-size: 0.9rem;
    color: #666;
}

.pricing-header p {
    color: #666;
    margin-bottom: 20px;
}

.pricing-features {
    list-style: none;
    margin: 25px 0;
    text-align: left;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    padding: 8px 0;
}

.pricing-features li i {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
}

.pricing-features li i.fa-check {
    background: #e8f5e9;
    color: #4caf50;
}

.pricing-features li i.fa-times {
    background: #ffebee;
    color: #f44336;
}

/* 资源中心 */
.resources {
    padding: 120px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.resource-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.resource-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.resource-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.5rem;
}

.resource-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.resource-card p {
    margin-bottom: 20px;
    opacity: 0.9;
}

.resource-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: white;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.resource-link:hover {
    color: #ffd700;
}

/* 关于我们 */
.about {
    padding: 120px 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.about-text p {
    margin-bottom: 20px;
    color: #666;
    line-height: 1.8;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 30px 0;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.stat-item h3 {
    font-size: 2rem;
    color: #3498db;
    margin-bottom: 5px;
    font-weight: 700;
}

.stat-item p {
    color: #666;
    font-size: 0.9rem;
}

.team-section h3 {
    font-size: 1.5rem;
    margin: 30px 0 15px;
    color: #2c3e50;
}

.team-section p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.team-highlights {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.highlight-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
}

.highlight-item i {
    font-size: 1.5rem;
    color: #3498db;
    margin-top: 3px;
}

.highlight-item h4 {
    margin-bottom: 5px;
    color: #2c3e50;
    font-weight: 600;
}

.highlight-item p {
    margin: 0;
    color: #666;
    font-size: 0.9rem;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* 客户评价 */
.testimonials {
    padding: 100px 0;
    background: #f8f9fa;
}

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

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

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 4rem;
    color: rgba(52, 152, 219, 0.1);
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-content {
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.testimonial-content p {
    font-style: italic;
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

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

.testimonial-author img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.testimonial-author h4 {
    margin-bottom: 5px;
    color: #2c3e50;
    font-weight: 600;
}

.testimonial-author p {
    color: #666;
    font-size: 0.9rem;
    margin: 0;
}

/* 联系我们 */
.contact {
    padding: 120px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.contact-info p {
    margin-bottom: 30px;
    opacity: 0.9;
    line-height: 1.6;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.contact-item i {
    font-size: 1.5rem;
    color: #3498db;
    margin-top: 5px;
}

.contact-item h4 {
    margin-bottom: 5px;
    font-weight: 600;
}

.contact-item p {
    margin: 0;
    opacity: 0.9;
}

.contact-hours h4 {
    margin-bottom: 10px;
    font-weight: 600;
}

.contact-hours ul {
    list-style: none;
}

.contact-hours li {
    margin-bottom: 8px;
    opacity: 0.9;
}

.contact-form .form-row {
    grid-template-columns: 1fr;
    gap: 0;
}

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 10px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: normal;
}

.contact-form input[type="checkbox"] {
    width: auto;
}

.contact-form textarea {
    resize: vertical;
}

.form-disclaimer {
    margin-top: 15px;
    font-size: 0.8rem;
    opacity: 0.8;
}

.form-disclaimer a {
    color: #ffd700;
    text-decoration: none;
}

.form-disclaimer a:hover {
    text-decoration: underline;
}

/* 页脚 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 80px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.footer-logo i {
    color: #3498db;
    margin-right: 10px;
}

.footer-logo p {
    margin-bottom: 20px;
    opacity: 0.7;
    font-size: 0.9rem;
}

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

.social-links a {
    color: white;
    font-size: 1.2rem;
    transition: color 0.3s ease;
    text-decoration: none;
}

.social-links a:hover {
    color: #3498db;
}

.footer-section h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
    position: relative;
    padding-bottom: 10px;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: #3498db;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.9rem;
}

.footer-section ul li a:hover {
    color: white;
    padding-left: 5px;
}

.contact-footer li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 15px;
}

.contact-footer i {
    margin-top: 5px;
    color: #3498db;
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-legal {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links {
    display: flex;
    gap: 15px;
    margin-top: 5px;
}

.footer-links a {
    color: #3498db;
    text-decoration: none;
    font-size: 0.9rem;
}

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

.payment-methods {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
}

.payment-methods i {
    color: white;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content {
        gap: 30px;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
}

@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .trust-indicators {
        justify-content: center;
    }
    
    .calc-container {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-card.popular {
        transform: scale(1);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0,0,0,0.05);
        padding: 20px 0;
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 1rem 0;
    }

    .hamburger {
        display: flex;
    }

    .hero {
        padding: 120px 0 60px;
        min-height: auto;
    }
    
    .hero-text h1 {
        font-size: 2.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .case-stats {
        flex-direction: column;
        align-items: center;
    }
    
    .checkbox-group {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-legal {
        align-items: center;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 10px;
    }
    
    .hero-text h1 {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .service-grid,
    .feature-grid,
    .case-grid,
    .pricing-grid,
    .resource-grid,
    .testimonial-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 10px;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

/* 表单验证样式 */
.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: #e74c3c;
}

.form-error-message {
    color: #e74c3c;
    font-size: 0.8rem;
    margin-top: 5px;
    display: block;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: #3498db;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2980b9;
}

/* 回到顶部按钮 */
#topButton {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

#topButton:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltip-text {
    visibility: hidden;
    width: 200px;
    background-color: #555;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.9rem;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}