/* ========================================
   广西北海阔途科技有限公司 - 企业官网样式
   风格：简约大气
   ======================================== */

/* CSS变量 - 主题配色 */
:root {
    --primary-color: #1a73e8;
    --primary-dark: #1557b0;
    --secondary-color: #00c853;
    --text-dark: #333333;
    --text-light: #666666;
    --text-muted: #999999;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-gray: #e9ecef;
    --border-color: #dee2e6;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul, ol {
    list-style: none;
}

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

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

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 8px;
    margin-right: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 18px;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
}

.company-name {
    font-size: 11px;
    font-weight: 400;
    color: var(--text-light);
    margin-top: 2px;
}

.nav-menu {
    display: flex;
    gap: 40px;
}

.nav-menu a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
    padding: 8px 0;
}

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

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

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

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--text-dark);
    transition: var(--transition);
}

/* ========================================
   Banner轮播
   ======================================== */
.banner {
    margin-top: 70px;
    height: calc(100vh - 70px);
    min-height: 500px;
    max-height: 700px;
    position: relative;
    overflow: hidden;
}

.banner-slides {
    display: flex;
    height: 100%;
    transition: transform 0.5s ease;
}

.banner-slide {
    min-width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, #667eea 100%);
    position: relative;
}

.banner-slide:nth-child(2) {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

.banner-slide:nth-child(3) {
    background: linear-gradient(135deg, #ee0979 0%, #ff6a00 100%);
}

.banner-content {
    text-align: center;
    color: white;
    z-index: 2;
    padding: 20px;
}

.banner-content h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.banner-content p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.banner-btn {
    display: inline-block;
    padding: 14px 40px;
    background: white;
    color: var(--primary-color);
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
}

.banner-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.banner-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}

.banner-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.banner-indicator.active {
    background: white;
    transform: scale(1.2);
}

/* ========================================
   通用区块样式
   ======================================== */
.section {
    padding: 80px 0;
}

.section-gray {
    background: var(--bg-light);
}

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

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.section-title p {
    font-size: 16px;
    color: var(--text-light);
}

.section-title-line {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 20px auto 0;
    border-radius: 2px;
}

/* ========================================
   关于我们简介
   ======================================== */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.about-text h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 30px;
}

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

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 5px;
}

/* ========================================
   产品服务卡片
   ======================================== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: 12px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.product-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: white;
}

.product-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.product-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ========================================
   案例展示
   ======================================== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.case-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), #667eea);
    position: relative;
    overflow: hidden;
}

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

.case-tag {
    position: absolute;
    top: 15px;
    left: 15px;
    padding: 5px 12px;
    background: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.case-content {
    padding: 25px;
}

.case-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.case-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ========================================
   合作伙伴
   ======================================== */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 30px;
}

.partner-item {
    background: white;
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

.partner-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.partner-logo {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
}

.partner-logo img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
}

.partner-name {
    font-size: 13px;
    color: var(--text-light);
}

/* ========================================
   联系我们
   ======================================== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--text-dark);
}

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

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--bg-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact-text h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.contact-text p {
    font-size: 14px;
    color: var(--text-light);
}

.contact-form {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 12px;
}

.contact-form h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--text-dark);
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

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

.submit-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(26, 115, 232, 0.3);
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: #1a1a2e;
    color: #ffffff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    color: white;
    margin-bottom: 20px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    line-height: 1.8;
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-links a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin-bottom: 12px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin-bottom: 12px;
}

/* 友情链接 */
.friend-links {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.friend-links-title {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.friend-links-list {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.friend-links-list a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    transition: var(--transition);
}

.friend-links-list a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* ========================================
   关于我们页面
   ======================================== */
.page-banner {
    margin-top: 70px;
    height: 300px;
    background: linear-gradient(135deg, var(--primary-color), #667eea);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.page-banner h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
}

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

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
    font-size: 14px;
    opacity: 0.8;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* 企业文化 */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.culture-item {
    text-align: center;
    padding: 40px 30px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.culture-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: white;
}

.culture-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.culture-item p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* 发展历程 */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--primary-color);
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: 50%;
    position: relative;
    margin-bottom: 40px;
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 50%;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 0 3px var(--primary-color);
}

.timeline-content {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    width: calc(100% - 40px);
    margin-right: 40px;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-right: 0;
    margin-left: 40px;
}

.timeline-year {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.timeline-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.timeline-content p {
    font-size: 14px;
    color: var(--text-light);
}

/* 团队介绍 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.team-member {
    text-align: center;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.team-avatar {
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: white;
}

.team-member h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--text-dark);
}

.team-role {
    font-size: 14px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.team-member p {
    font-size: 13px;
    color: var(--text-light);
}

/* ========================================
   产品服务页面
   ======================================== */
.service-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 60px 0;
    border-bottom: 1px solid var(--border-color);
}

.service-detail:last-child {
    border-bottom: none;
}

.service-detail:nth-child(even) {
    direction: rtl;
}

.service-detail:nth-child(even) > * {
    direction: ltr;
}

.service-image {
    height: 350px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.service-image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), #667eea);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: white;
}

.service-content h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.service-content p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.service-features {
    list-style: none;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    font-size: 14px;
    color: var(--text-dark);
}

.service-features li::before {
    content: '✓';
    width: 24px;
    height: 24px;
    background: var(--secondary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    flex-shrink: 0;
}

/* ========================================
   案例页面
   ======================================== */
.case-filter {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 10px 25px;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    cursor: pointer;
    transition: var(--transition);
}

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

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

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

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: var(--shadow);
        display: none;
    }

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

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

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

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

    .section {
        padding: 60px 0;
    }

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

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

    .about-image {
        order: -1;
    }

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

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

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

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

    .timeline::before {
        left: 20px;
    }

    .timeline-item,
    .timeline-item:nth-child(even) {
        padding-left: 50px;
        padding-right: 0;
        justify-content: flex-start;
    }

    .timeline-item::before {
        left: 20px;
    }

    .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 20px;
        margin-right: 0;
        width: 100%;
    }

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

    .service-detail,
    .service-detail:nth-child(even) {
        grid-template-columns: 1fr;
        direction: ltr;
    }

    .about-stats {
        justify-content: center;
    }

    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .partner-item {
        padding: 20px 15px;
    }

    .partner-logo {
        height: 40px;
        font-size: 14px;
    }
}

/* ========================================
   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;
}

/* 加载占位符 */
.loading-placeholder {
    background: linear-gradient(90deg, var(--bg-light) 25%, var(--bg-gray) 50%, var(--bg-light) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}