/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "微软雅黑", Arial, sans-serif;
}

body {
    background-color: #f5f7fa;
    color: #333;
}

/* 全屏banner样式 */
.banner {
    width: 100%;
    height: 600px;
    background: url(images/banner/banner1.jpg) no-repeat center center;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-align: center;
}

.banner-content {
    max-width: 800px;
}

.banner h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.banner p {
    font-size: 20px;
    margin-bottom: 30px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: #007bff;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
}

.btn:hover {
    background-color: #0056b3;
    transform: translateY(-3px);
}

/* 导航栏样式 */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 999;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #007bff;
    text-decoration: none;
}

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

.nav-menu li {
    margin-left: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-size: 16px;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: #007bff;
}

/* 内容区域通用样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 20px;
}

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

.section-title h2 {
    font-size: 36px;
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: #007bff;
}

/* 项目展示样式 */
.projects {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.project-item {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.project-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.project-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.project-content {
    padding: 20px;
}

.project-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #007bff;
}

/* 价格展示样式 */
.prices {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.price-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: all 0.3s;
}

.price-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.price-header {
    background-color: #007bff;
    color: #fff;
    padding: 30px 20px;
}

.price-header h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

.price-header .price {
    font-size: 36px;
    font-weight: bold;
}

.price-body {
    padding: 20px;
}

.price-body ul {
    list-style: none;
    margin-bottom: 30px;
}

.price-body li {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

/* 案例展示样式 */
.cases {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.case-item {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.case-img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.case-content {
    padding: 20px;
}

.case-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #007bff;
}

.case-content .client {
    color: #666;
    margin-bottom: 15px;
    display: block;
}

/* 联系我们样式 */
.contact {
    background-color: #fff;
    padding: 60px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

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

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.contact-form textarea {
    height: 150px;
    resize: none;
}

/* 后台样式 */
.admin-login {
    max-width: 400px;
    margin: 100px auto;
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.admin-login h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #007bff;
}

.admin-login input {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.admin-login button {
    width: 100%;
    padding: 12px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.admin-container {
    display: flex;
}

.admin-sidebar {
    width: 220px;
    background-color: #333;
    color: #fff;
    min-height: 100vh;
    padding: 20px;
}

.admin-sidebar h3 {
    margin-bottom: 30px;
    text-align: center;
    font-size: 20px;
}

.admin-sidebar ul {
    list-style: none;
}

.admin-sidebar li {
    margin-bottom: 15px;
}

.admin-sidebar a {
    color: #fff;
    text-decoration: none;
    display: block;
    padding: 10px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.admin-sidebar a:hover {
    background-color: #007bff;
}

.admin-content {
    flex: 1;
    padding: 30px;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 30px;
}

.admin-table th,
.admin-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.admin-table th {
    background-color: #f5f7fa;
    font-weight: bold;
}

.admin-form input,
.admin-form textarea,
.admin-form select {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.admin-form textarea {
    height: 150px;
    resize: none;
}

.admin-form button {
    padding: 12px 30px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}