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

html {
    font-size: 18px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
}

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

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

/* 头部 */
.header {
    background: #fff;
    padding: 15px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
}

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

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    height: 50px;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: #333;
    letter-spacing: 1px;
}

.btn-contact {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 10px 25px;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-contact:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

/* Banner */
.banner {
    position: relative;
    margin-top: 80px;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.banner-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 60px 20px;
    color: #fff;
}

.banner-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 0 3px 15px rgba(0,0,0,0.4);
    line-height: 1.2;
}

.banner-subtitle {
    font-size: 24px;
    margin-bottom: 30px;
    opacity: 0.95;
    font-weight: 500;
}

.banner-highlight {
    margin-bottom: 30px;
}

.highlight-text {
    display: inline-block;
    font-size: 28px;
    font-weight: 700;
    color: #00e254;
    text-shadow: 0 3px 10px rgba(0,0,0,0.4);
}

.banner-stats {
    font-size: 18px;
    opacity: 0.9;
    line-height: 1.8;
    font-weight: 500;
}

/* 通用标题 */
.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: #333;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin: 15px auto 0;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 18px;
    color: #666;
    font-weight: 500;
}

/* 业务介绍 */
.business {
    background: #fff;
    padding: 80px 0;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.business-item {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(145deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 20px;
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
    cursor: pointer;
}

.business-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(102, 126, 234, 0.2);
    border-color: #667eea;
}

.business-item img {
    width: auto;
    height: 90px;
    margin: 0 auto 20px;
    transition: all 0.3s ease;
}

.business-item:hover img {
    transform: scale(1.15);
}

.business-item span {
    display: block;
    font-size: 18px;
    color: #333;
    font-weight: 600;
    line-height: 1.4;
}

/* 我们的优势 */
.advantages {
    background: #f5f5f5;
    padding: 80px 0;
}

.advantages .section-title {
    text-align: center;
    display: block;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.advantage-item {
    background: #fff;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.advantage-item:hover {
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
    transform: translateY(-8px);
}

.advantage-item img {
    width: auto;
    height: 90px;
    margin: 0 auto 25px;
}

.advantage-item h3 {
    font-size: 22px;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.advantage-item p {
    font-size: 16px;
    color: #666;
    line-height: 1.7;
}

/* 服务说明 */
.service-notice {
    background: #fff;
    padding: 80px 0;
}

.service-notice .section-title {
    text-align: center;
    display: block;
}

.notice-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    background: #fff;
    border-radius: 24px;
    padding: 50px;
    box-shadow: 0 15px 60px rgba(0,0,0,0.1);
    border: 1px solid #e9ecef;
}

.notice-list {
    margin-bottom: 40px;
}

.notice-item {
    display: flex;
    align-items: flex-start;
    padding: 20px 0;
    border-bottom: 1px solid #f0f0f0;
}

.notice-item:last-child {
    border-bottom: none;
}

.notice-dot {
    width: 12px;
    height: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    margin-right: 20px;
    margin-top: 8px;
    flex-shrink: 0;
}

.notice-item p {
    font-size: 18px;
    color: #555;
    line-height: 1.7;
    flex: 1;
}

.notice-action {
    text-align: center;
}

.btn-primary {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 18px 80px;
    border-radius: 35px;
    font-size: 20px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.5);
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.6);
}

/* 用户评价 */
.reviews {
    background: #f5f5f5;
    padding: 80px 0;
}

.reviews-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.review-item {
    background: #fff;
    padding: 30px;
    border-radius: 20px;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.review-item:hover {
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
    transform: translateY(-5px);
}

.review-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin-right: 20px;
    overflow: hidden;
    border: 3px solid #667eea;
}

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

.username {
    font-size: 18px;
    color: #333;
    font-weight: 600;
}

.review-content {
    font-size: 16px;
    color: #555;
    line-height: 1.8;
}

/* 温馨提示 */
.tips {
    background: #f5f5f5;
    padding: 80px 0;
}

.tips .section-title {
    text-align: center;
    display: block;
}

.tips-list {
    max-width: 1200px;
    margin: 0 auto;
    background: #fff;
    border-radius: 24px;
    padding: 50px;
    box-shadow: 0 15px 60px rgba(0,0,0,0.1);
    border: 1px solid #e9ecef;
}

.tip-item {
    display: flex;
    align-items: flex-start;
    padding: 20px 0;
}

.tip-num {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    margin-right: 20px;
    flex-shrink: 0;
}

.tip-item p {
    font-size: 18px;
    color: #555;
    line-height: 1.7;
    flex: 1;
}

/* 底部 */
.footer {
    background: #333;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}

.footer p {
    font-size: 16px;
    color: #aaa;
    margin: 0;
    font-weight: 500;
}

/* 悬浮按钮 */
.float-contact {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
}

.btn-float {
    display: block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 15px 30px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
    transition: all 0.3s ease;
}

.btn-float:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.6);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .reviews-list {
        grid-template-columns: 1fr;
    }
    
    .banner-title {
        font-size: 40px;
    }
    
    .banner-subtitle {
        font-size: 20px;
    }
    
    .highlight-text {
        font-size: 24px;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 16px;
    }
    
    .header {
        padding: 10px 0;
    }
    
    .logo {
        height: 40px;
    }
    
    .logo-text {
        font-size: 18px;
    }
    
    .btn-contact {
        padding: 8px 20px;
        font-size: 14px;
    }
    
    .banner {
        min-height: 400px;
        margin-top: 70px;
    }
    
    .banner-title {
        font-size: 32px;
    }
    
    .banner-subtitle {
        font-size: 18px;
    }
    
    .highlight-text {
        font-size: 20px;
    }
    
    .business {
        padding: 60px 0;
    }
    
    .business-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .business-item {
        padding: 30px 15px;
    }
    
    .business-item img {
        width: auto;
        height: 70px;
    }
    
    .business-item span {
        font-size: 16px;
    }
    
    .advantages {
        padding: 60px 0;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .advantage-item {
        padding: 30px;
    }
    
    .advantage-item img {
        width: auto;
        height: 70px;
    }
    
    .advantage-item h3 {
        font-size: 20px;
    }
    
    .advantage-item p {
        font-size: 15px;
    }
    
    .service-notice {
        padding: 60px 0;
    }
    
    .notice-wrapper {
        padding: 35px;
    }
    
    .notice-item p {
        font-size: 16px;
    }
    
    .btn-primary {
        padding: 16px 60px;
        font-size: 18px;
    }
    
    .reviews {
        padding: 60px 0;
    }
    
    .review-item {
        padding: 25px;
    }
    
    .avatar {
        width: 50px;
        height: 50px;
    }
    
    .username {
        font-size: 16px;
    }
    
    .review-content {
        font-size: 15px;
    }
    
    .tips {
        padding: 60px 0;
    }
    
    .tips-list {
        padding: 35px;
    }
    
    .tip-item p {
        font-size: 16px;
    }
    
    .tip-num {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 12px;
    }
    
    .footer p {
        font-size: 14px;
    }
    
    .float-contact {
        bottom: 20px;
        right: 20px;
    }
    
    .btn-float {
        padding: 12px 25px;
        font-size: 14px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .banner {
        min-height: 350px;
    }
    
    .banner-title {
        font-size: 28px;
    }
    
    .banner-subtitle {
        font-size: 16px;
    }
    
    .banner-stats {
        font-size: 14px;
    }
    
    .highlight-text {
        font-size: 18px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .business-grid {
        gap: 15px;
    }
    
    .business-item {
        padding: 20px 10px;
    }
    
    .business-item img {
        width: auto;
        height: 60px;
    }
    
    .business-item span {
        font-size: 14px;
    }
    
    .notice-wrapper,
    .tips-list {
        padding: 25px;
    }
    
    .notice-item,
    .tip-item {
        padding: 15px 0;
    }
    
    .notice-dot {
        width: 10px;
        height: 10px;
        margin-top: 7px;
    }
    
    .tip-num {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }
    
    .btn-primary {
        padding: 14px 40px;
        font-size: 16px;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.business-item,
.advantage-item,
.review-item {
    animation: fadeInUp 0.8s ease forwards;
}

.business-item:nth-child(1) { animation-delay: 0.1s; }
.business-item:nth-child(2) { animation-delay: 0.2s; }
.business-item:nth-child(3) { animation-delay: 0.3s; }
.business-item:nth-child(4) { animation-delay: 0.4s; }
.business-item:nth-child(5) { animation-delay: 0.5s; }
.business-item:nth-child(6) { animation-delay: 0.6s; }
.business-item:nth-child(7) { animation-delay: 0.7s; }
.business-item:nth-child(8) { animation-delay: 0.8s; }

.advantage-item:nth-child(1) { animation-delay: 0.1s; }
.advantage-item:nth-child(2) { animation-delay: 0.2s; }
.advantage-item:nth-child(3) { animation-delay: 0.3s; }
.advantage-item:nth-child(4) { animation-delay: 0.4s; }

.review-item:nth-child(1) { animation-delay: 0.1s; }
.review-item:nth-child(2) { animation-delay: 0.2s; }
.review-item:nth-child(3) { animation-delay: 0.3s; }
.review-item:nth-child(4) { animation-delay: 0.4s; }
.review-item:nth-child(5) { animation-delay: 0.5s; }