/* 中普网 CSS样式文件 */
/* 响应式布局 | div+css | 兼容Windows Server 2008 / IIS 7.5 */

/* ==================== 基础重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
    color: #2c3e50;
    background-color: #f5f6fa;
    line-height: 1.6;
}

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

ul, ol {
    list-style: none;
}

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

input, button {
    border: none;
    outline: none;
    font-family: inherit;
}

/* ==================== 变量定义 ==================== */
:root {
    /* 颜色 */
    --primary: #1a5276;
    --primary-light: #2980b9;
    --accent: #e67e22;
    --accent-light: #f39c12;
    --bg-light: #f5f6fa;
    --bg-white: #ffffff;
    --text-dark: #2c3e50;
    --text-gray: #7f8c8d;
    --text-light: #95a5a6;
    --border: #ecf0f1;
    --shadow: rgba(0, 0, 0, 0.1);

    /* 间距 */
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 20px;
    --spacing-lg: 30px;
    --spacing-xl: 60px;

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* 容器 */
    --container: 1200px;
}

/* ==================== 通用工具类 ==================== */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
}

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

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

/* ==================== 头部导航 ==================== */
.header {
    background-color: var(--bg-white);
    box-shadow: 0 2px 10px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top {
    background-color: var(--primary);
    color: var(--bg-white);
    padding: 8px 0;
    font-size: 13px;
}

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

.header-top a {
    color: var(--bg-white);
    margin-left: var(--spacing-md);
}

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

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

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 20px;
    margin-right: 12px;
}

.nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-list li a {
    font-size: 15px;
    color: var(--text-dark);
    padding: 8px 0;
    position: relative;
    transition: color 0.3s;
}

.nav-list li a:hover,
.nav-list li a.active {
    color: var(--primary);
}

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

.nav-list li a:hover::after,
.nav-list li a.active::after {
    width: 100%;
}

.header-contact {
    background-color: var(--accent);
    color: var(--bg-white);
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: background-color 0.3s;
}

.header-contact:hover {
    background-color: var(--accent-light);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    width: 30px;
    height: 30px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary);
    border-radius: 2px;
    transition: all 0.3s;
}

/* ==================== 横幅区域 ==================== */
.banner {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--bg-white);
    padding: 80px 0 60px;
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: rgba(255, 255, 255, 0.05);
    transform: rotate(15deg);
}

.banner-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

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

.stat-number {
    font-size: 48px;
    font-weight: 700;
    display: block;
}

.stat-label {
    font-size: 16px;
    opacity: 0.9;
}

.banner-packages {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.package-card {
    background-color: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    width: 280px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
}

.package-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.package-card.featured {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    color: var(--bg-white);
    transform: scale(1.05);
}

.package-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.package-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.package-price {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.package-card.featured .package-price {
    color: var(--bg-white);
}

.package-price span {
    font-size: 16px;
    font-weight: 400;
}

.package-desc {
    color: var(--text-gray);
    font-size: 13px;
    line-height: 1.8;
}

.package-card.featured .package-desc {
    color: rgba(255, 255, 255, 0.9);
}

.package-btn {
    display: inline-block;
    background-color: var(--primary);
    color: var(--bg-white);
    padding: 12px 30px;
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
    font-weight: 500;
    transition: background-color 0.3s;
}

.package-card.featured .package-btn {
    background-color: var(--bg-white);
    color: var(--accent);
}

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

.banner-tagline {
    text-align: center;
    margin-top: var(--spacing-xl);
    font-size: 24px;
    font-weight: 500;
    position: relative;
    z-index: 1;
}

/* ==================== 服务项目 ==================== */
.services {
    background-color: var(--bg-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.service-card {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--radius-lg);
    background-color: var(--bg-light);
    transition: all 0.3s;
}

.service-card:hover {
    box-shadow: 0 10px 30px var(--shadow);
    transform: translateY(-5px);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.service-icon svg {
    width: 40px;
    height: 40px;
    fill: var(--bg-white);
}

.service-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.service-desc {
    color: var(--text-gray);
    font-size: 14px;
    line-height: 1.8;
}

/* ==================== 网站类型 ==================== */
.website-types {
    background-color: var(--bg-light);
}

.types-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--spacing-md);
}

.type-card {
    background-color: var(--bg-white);
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
}

.type-card:hover {
    box-shadow: 0 5px 20px var(--shadow);
    transform: translateY(-3px);
}

.type-card.active {
    background-color: var(--primary);
    color: var(--bg-white);
}

.type-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.type-icon svg {
    width: 40px;
    height: 40px;
    fill: var(--primary);
}

.type-card.active .type-icon svg {
    fill: var(--bg-white);
}

.type-name {
    font-size: 14px;
    font-weight: 500;
}

/* ==================== 行业分类 ==================== */
.industries {
    background-color: var(--bg-white);
}

.industries-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.tab-item {
    padding: 8px 16px;
    background-color: var(--bg-light);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s;
    font-size: 13px;
}

.tab-item:hover {
    background-color: var(--primary-light);
    color: var(--bg-white);
}

.tab-item.active {
    background-color: var(--primary);
    color: var(--bg-white);
}

.industries-list {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: var(--spacing-sm);
}

.industry-item {
    padding: 10px;
    background-color: var(--bg-light);
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s;
}

.industry-item:hover {
    background-color: var(--primary);
    color: var(--bg-white);
}

/* ==================== 优势展示 ==================== */
.advantages {
    background-color: var(--bg-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-md);
}

.advantage-card {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all 0.3s;
}

.advantage-card:hover {
    box-shadow: 0 5px 20px var(--shadow);
    transform: translateY(-3px);
}

.advantage-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.advantage-icon svg {
    width: 30px;
    height: 30px;
    fill: var(--bg-white);
}

.advantage-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
}

/* ==================== 经典案例 ==================== */
.cases {
    background-color: var(--bg-white);
}

.cases-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.case-tab {
    padding: 10px 20px;
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s;
    font-size: 14px;
}

.case-tab:hover {
    background-color: var(--primary-light);
    color: var(--bg-white);
}

.case-tab.active {
    background-color: var(--primary);
    color: var(--bg-white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.case-card {
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s;
}

.case-card:hover {
    box-shadow: 0 10px 30px var(--shadow);
    transform: translateY(-5px);
}

.case-image {
    height: 150px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 48px;
    opacity: 0.3;
}

.case-info {
    padding: var(--spacing-md);
}

.case-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.case-tag {
    font-size: 12px;
    color: var(--text-gray);
}

/* ==================== 文章资讯 ==================== */
.news {
    background-color: var(--bg-light);
}

.news-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.news-tab {
    padding: 10px 25px;
    font-size: 16px;
    cursor: pointer;
    position: relative;
    color: var(--text-gray);
    transition: color 0.3s;
}

.news-tab::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background-color: var(--accent);
    transition: width 0.3s;
}

.news-tab:hover,
.news-tab.active {
    color: var(--accent);
}

.news-tab.active::after {
    width: 100%;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.news-card {
    background-color: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s;
}

.news-card:hover {
    box-shadow: 0 10px 30px var(--shadow);
    transform: translateY(-5px);
}

.news-image {
    height: 140px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 36px;
    opacity: 0.5;
}

.news-content {
    padding: var(--spacing-md);
}

.news-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-date {
    font-size: 12px;
    color: var(--text-light);
}

/* ==================== 关于我们 ==================== */
.about {
    background-color: var(--bg-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.about-intro {
    padding: var(--spacing-lg);
}

.about-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.about-text {
    color: var(--text-gray);
    line-height: 2;
    margin-bottom: var(--spacing-md);
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-dark);
}

.highlight-icon {
    width: 24px;
    height: 24px;
    background-color: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.highlight-icon svg {
    width: 14px;
    height: 14px;
    fill: var(--bg-white);
}

.about-advantages {
    padding: var(--spacing-lg);
}

.advantage-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
}

.advantage-num {
    width: 28px;
    height: 28px;
    background-color: var(--primary);
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

.advantage-text {
    font-size: 13px;
    color: var(--text-dark);
    line-height: 1.6;
}

/* ==================== 页脚 ==================== */
.footer {
    background-color: var(--primary);
    color: var(--bg-white);
}

.footer-main {
    padding: var(--spacing-xl) 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links li a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 13px;
    transition: color 0.3s;
}

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

.footer-contact p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 13px;
    margin-bottom: var(--spacing-sm);
}

.footer-contact .phone {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
    display: block;
    margin-bottom: var(--spacing-md);
}

.footer-bottom {
    background-color: rgba(0, 0, 0, 0.2);
    padding: var(--spacing-md) 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    margin: 0 var(--spacing-sm);
}

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

.friendly-links {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.friendly-links h4 {
    font-size: 14px;
    margin-bottom: var(--spacing-sm);
}

.friendly-links-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.friendly-links-list a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
}

.friendly-links-list a:hover {
    color: var(--accent);
}

/* ==================== 响应式设计 ==================== */

/* 平板 (768px - 1199px) */
@media (max-width: 1199px) {
    .banner-stats {
        gap: var(--spacing-lg);
    }

    .stat-number {
        font-size: 36px;
    }

    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .types-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .industries-list {
        grid-template-columns: repeat(8, 1fr);
    }

    .advantages-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .cases-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .news-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 手机 (< 768px) */
@media (max-width: 767px) {
    html {
        font-size: 12px;
    }

    .header-top {
        display: none;
    }

    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: 0 5px 20px var(--shadow);
        gap: 0;
    }

    .nav-list.active {
        display: flex;
    }

    .nav-list li a {
        display: block;
        padding: var(--spacing-sm) 0;
        border-bottom: 1px solid var(--border);
    }

    .menu-toggle {
        display: flex;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .header-contact {
        display: none;
    }

    .banner {
        padding: 40px 0 30px;
    }

    .banner-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .stat-number {
        font-size: 28px;
    }

    .banner-packages {
        flex-direction: column;
        align-items: center;
    }

    .package-card {
        width: 100%;
        max-width: 320px;
    }

    .package-card.featured {
        transform: scale(1);
    }

    .banner-tagline {
        font-size: 18px;
    }

    .section {
        padding: var(--spacing-lg) 0;
    }

    .section-title {
        font-size: 22px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .types-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .industries-list {
        grid-template-columns: repeat(5, 1fr);
    }

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

    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

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

    .advantage-list {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .friendly-links-list {
        justify-content: center;
    }
}

/* 小屏手机 (< 480px) */
@media (max-width: 479px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .types-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .industries-list {
        grid-template-columns: repeat(4, 1fr);
    }

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

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