/* 永网官网样式 */
:root {
    --primary-color: #0066cc;
    --secondary-color: #003366;
    --accent-color: #ff6600;
    --text-color: #333;
    --light-bg: #f5f5f5;
    --white: #fff;
    --border-color: #ddd;
}

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

body {
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    color: var(--text-color);
    line-height: 1.6;
}

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

ul {
    list-style: none;
}

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

/* 头部导航 */
header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header-top {
    background: var(--secondary-color);
    color: var(--white);
    padding: 5px 0;
    font-size: 14px;
}

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

.header-main {
    padding: 15px 0;
}

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

.logo {
    font-size: 28px;
    font-weight: bold;
    color: var(--accent-color);
}

.logo span {
    color: var(--accent-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--secondary-color);
    transition: 0.3s;
}

nav ul {
    display: flex;
    gap: 30px;
}

nav ul li a {
    font-size: 16px;
    color: var(--secondary-color);
    padding: 10px 0;
    display: block;
    position: relative;
    transition: color 0.3s;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s;
}

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

nav ul li a:hover::after {
    width: 100%;
}

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

/* 移动端导航 */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    nav ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    }

    nav ul.show {
        display: flex;
    }

    nav ul li a {
        padding: 15px 0;
        border-bottom: 1px solid var(--border-color);
    }
}

/* 横幅区域 */
.banner {
    margin-top: 120px;
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    color: var(--white);
    padding: 80px 0;
    text-align: center;
}

.banner h1 {
    font-size: 42px;
    margin-bottom: 20px;
}

.banner p {
    font-size: 20px;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
}

.banner .btn {
    display: inline-block;
    margin-top: 30px;
    padding: 15px 40px;
    background: var(--accent-color);
    color: var(--white);
    border-radius: 5px;
    font-size: 18px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.banner .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(255,102,0,0.4);
}

/* 主要按钮样式 */
.btn-primary {
    display: inline-block;
    padding: 14px 42px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,102,204,0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-color), #e55a00);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255,102,0,0.4);
    color: #fff;
}

/* 服务区域 */
.services {
    padding: 80px 0;
    background: var(--light-bg);
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 36px;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.section-title p {
    color: #666;
    font-size: 16px;
}

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

.service-item {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    display: block;
    color: inherit;
}

.service-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

a.service-item {
    text-decoration: none;
}

.service-item .icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 36px;
    color: var(--white);
}

.service-item h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.service-item p {
    color: #666;
    font-size: 14px;
}

/* 关于我们 */
.about {
    padding: 80px 0;
}

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

.about-text h2 {
    font-size: 36px;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.about-text p {
    color: #666;
    margin-bottom: 20px;
    font-size: 16px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 30px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature .check {
    color: var(--accent-color);
    font-weight: bold;
}

.about-image {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 100px;
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        height: 300px;
    }
}

/* 案例展示 */
.cases {
    padding: 80px 0;
    background: var(--light-bg);
}

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

.case-item {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.case-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.case-image {
    height: 250px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 60px;
}

.case-info {
    padding: 25px;
}

.case-info h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.case-info p {
    color: #666;
    font-size: 14px;
}

.case-info .tag {
    display: inline-block;
    background: var(--light-bg);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 12px;
    color: var(--primary-color);
    margin-top: 15px;
}

/* 案例详情页 */
.case-detail {
    padding: 80px 0;
}

.case-detail-header {
    margin-bottom: 40px;
}

.case-detail-header h1 {
    font-size: 36px;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.case-detail-header .meta {
    color: #999;
    font-size: 14px;
}

.case-detail-content {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

.case-detail-content p {
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.8;
}

.case-detail-images {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.case-detail-images .img {
    height: 250px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 40px;
}

/* 新闻列表 */
.news-section {
    padding: 80px 0;
    background: var(--light-bg);
}

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

.news-item {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.news-image {
    height: 200px;
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 50px;
}

.news-content {
    padding: 25px;
}

.news-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.news-content h3 a:hover {
    color: var(--primary-color);
}

.news-content p {
    color: #666;
    font-size: 14px;
    margin-bottom: 15px;
}

.news-content .meta {
    color: #999;
    font-size: 12px;
}

/* 新闻详情 */
.news-detail {
    padding: 80px 0;
}

.news-detail-header {
    margin-bottom: 40px;
    text-align: center;
}

.news-detail-header h1 {
    font-size: 32px;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.news-detail-header .meta {
    color: #999;
    font-size: 14px;
}

.news-detail-content {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    max-width: 900px;
    margin: 0 auto;
}

.news-detail-content p {
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.8;
}

/* 页面内容通用 */
.page-content {
    padding: 80px 0;
    background: var(--light-bg);
    min-height: 60vh;
}

.page-content.white {
    background: var(--white);
}

.page-header {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    color: var(--white);
    padding: 60px 0;
    text-align: center;
    margin-top: 120px;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

.content-section {
    padding: 60px 0;
}

.content-box {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    margin-bottom: 30px;
}

.content-box h2 {
    font-size: 28px;
    color: var(--secondary-color);
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 3px solid var(--primary-color);
}

.content-box h3 {
    font-size: 22px;
    color: var(--secondary-color);
    margin: 25px 0 15px;
}

.content-box p {
    color: #666;
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 15px;
}

.content-box ul {
    padding-left: 20px;
}

.content-box ul li {
    color: #666;
    font-size: 16px;
    margin-bottom: 10px;
    position: relative;
    padding-left: 20px;
}

.content-box ul li::before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-size: 20px;
}

.price-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.price-table th,
.price-table td {
    padding: 15px;
    text-align: left;
    border: 1px solid var(--border-color);
}

.price-table th {
    background: var(--secondary-color);
    color: var(--white);
    font-weight: bold;
}

.price-table tr:nth-child(even) {
    background: var(--light-bg);
}

.price-table .highlight {
    background: #fff8e6;
    font-weight: bold;
    color: var(--accent-color);
}

/* 联系我们 */
.contact-section {
    padding: 80px 0;
    background: var(--light-bg);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

.contact-info h3 {
    font-size: 24px;
    color: var(--secondary-color);
    margin-bottom: 25px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 25px;
}

.contact-item .icon {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 24px;
    flex-shrink: 0;
}

.contact-item .text h4 {
    font-size: 16px;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.contact-item .text p {
    color: #666;
    font-size: 14px;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

.contact-form h3 {
    font-size: 24px;
    color: var(--secondary-color);
    margin-bottom: 25px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--secondary-color);
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.submit-btn {
    background: var(--primary-color);
    color: var(--white);
    padding: 15px 40px;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    transition: background 0.3s;
}

.submit-btn:hover {
    background: var(--secondary-color);
}

@media (max-width: 768px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

/* 底部 */
footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 50px 0 20px;
}

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

.footer-section h4 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: rgba(255,255,255,0.8);
    font-size: 14px;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.6);
    font-size: 14px;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 50px;
}

.pagination a {
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-color);
    transition: all 0.3s;
}

.pagination a:hover,
.pagination a.active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

/* 面包屑 */
.breadcrumb {
    padding: 15px 0;
    background: var(--light-bg);
}

.breadcrumb .container {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: #999;
}

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

.breadcrumb span {
    color: #666;
}

/* 返回顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    box-shadow: 0 5px 15px rgba(0,102,204,0.3);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-5px);
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade {
    animation: fadeIn 0.6s ease-out;
}

/* 响应式调整 */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 720px;
    }

    .banner h1 {
        font-size: 32px;
    }

    .section-title h2 {
        font-size: 28px;
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 540px;
    }

    .banner {
        padding: 60px 0;
    }

    .banner h1 {
        font-size: 28px;
    }

    .banner p {
        font-size: 16px;
    }

    .services {
        padding: 60px 0;
    }

    .cases-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }

    .page-header h1 {
        font-size: 28px;
    }

    .content-box {
        padding: 25px;
    }

    .case-detail-images {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .logo {
        font-size: 22px;
    }

    .banner h1 {
        font-size: 24px;
    }

    .service-item {
        padding: 30px 20px;
    }

    .about-features {
        grid-template-columns: 1fr;
    }
}