* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

:root {
    --primary-color: #2563eb; /* 主题色修改为#2563eb */
    --primary-light: #dbeafe; /* 衍生浅色 */
    --primary-dark: #1d4ed8; /* 衍生深色 */
    --text-dark: #333;
    --text-medium: #666;
    --text-light: #999;
    --white: #fff;
    --gray-light: #f8f9fa;
    --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 15px 35px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

body {
    background: var(--gray-light);
    color: var(--text-dark);
    scroll-behavior: smooth;
    line-height: 1.6;
}

/* 导航栏：突出科技感，固定顶部 */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-sm);
    z-index: 999;
    transition: var(--transition);
}

    nav.scrolled {
        padding: 8px 0;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    }

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

.nav-logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: transform 0.3s ease;
}

    .nav-logo:hover {
        transform: scale(1.05);
    }

    .nav-logo i {
        font-size: 28px;
    }

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

    .nav-links a {
        margin: 0 15px;
        text-decoration: none;
        color: var(--text-dark);
        font-weight: 500;
        transition: var(--transition);
        position: relative;
    }

        .nav-links a:hover {
            color: var(--primary-color);
            transform: translateY(-2px);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

.contact-btn {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: 8px 18px;
    border-radius: 20px;
    margin-left: 10px;
    transition: var(--transition);
}

    .contact-btn:hover {
        background: var(--primary-dark);
        box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2); /* 阴影色同步主题 */
        transform: translateY(-2px);
    }

    .contact-btn::after {
        display: none;
    }

/* 页面标题区域 */
.page-header {
    height: 350px;
    background: linear-gradient(135deg, var(--primary-light), var(--white));
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

    .page-header::before {
        content: '';
        position: absolute;
        width: 100%;
        height: 100%;
        background-image: url('https://www.black-jet.cn/images/banner-bg.jpg');
        background-size: cover;
        background-position: center;
        opacity: 0.15;
        z-index: 0;
        transform: scale(1.02);
        animation: bgFloat 20s infinite alternate ease-in-out;
    }

.header-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 0 20px;
}

    .header-content h1 {
        font-size: 48px;
        margin-bottom: 15px;
        color: var(--text-dark);
        position: relative;
        display: inline-block;
    }

        .header-content h1::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--primary-color);
            border-radius: 2px;
        }

    .header-content p {
        font-size: 18px;
        color: var(--text-medium);
        margin-top: 30px;
        line-height: 1.8;
    }

/* 关于我们内容区域 */
.about-container {
    max-width: 1200px;
    margin: 100px auto;
    padding: 0 20px;
}

/* 发展历程（包含左侧公司简介） */
.development-history {
    margin-bottom: 120px;
    position: relative;
    padding-top: 30px;
    display: flex;
    flex-wrap: wrap;
    gap: 60px;
}

/* 左侧公司简介 */
.company-intro-sidebar {
    flex: 0 0 350px;
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

    .company-intro-sidebar.visible {
        opacity: 1;
        transform: translateX(0);
    }

.sidebar-image {
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: 30px;
}

    .sidebar-image img {
        width: 100%;
        height: auto;
        display: block;
        transition: transform 8s ease;
    }

    .sidebar-image:hover img {
        transform: scale(1.05);
    }

.sidebar-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin: 30px 0;
}

.sidebar-stat-item {
    flex: 1;
    min-width: 120px;
    text-align: center;
    padding: 15px 10px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.sidebar-stat-number {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.sidebar-stat-label {
    font-size: 13px;
    color: var(--text-medium);
}

/* 右侧时间线 */
.history-timeline {
    position: relative;
    flex: 1;
    min-width: 300px;
    margin: 0;
    padding-left: 0;
}

    .history-timeline::before {
        content: '';
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        width: 4px;
        background: var(--primary-light);
        transform: none;
    }

.timeline-item {
    position: relative;
    margin-bottom: 60px;
    width: 100%;
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    padding-left: 30px;
}

    .timeline-item.visible {
        opacity: 1;
        transform: translateX(0);
    }

    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        padding-right: 0;
        padding-left: 30px;
        text-align: left;
        transform: translateX(30px);
    }

        .timeline-item:nth-child(even).visible {
            transform: translateX(0);
        }

.timeline-date {
    font-size: 20px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
    display: inline-block;
    padding: 5px 12px;
    background: var(--primary-light);
    border-radius: 20px;
}

.timeline-content {
    background: var(--white);
    padding: 25px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

    .timeline-content:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-lg);
    }

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

    .timeline-content p {
        font-size: 15px;
        color: var(--text-medium);
        line-height: 1.6;
    }

.timeline-dot {
    position: absolute;
    left: 0;
    top: 5px;
    width: 20px;
    height: 20px;
    background: var(--white);
    border: 4px solid var(--primary-color);
    border-radius: 50%;
    transform: none;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1); /* 阴影色同步主题 */
    transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.2);
    box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.15); /* 阴影色同步主题 */
}

/* 企业文化 */
.company-culture {
    margin-bottom: 120px;
    position: relative;
    padding-top: 30px;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.culture-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 35px 30px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0;
    transform: translateY(30px);
    position: relative;
    overflow: hidden;
}

    .culture-item::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 4px;
        background: var(--primary-color);
        transform: scaleX(0);
        transition: transform 0.3s ease;
    }

    .culture-item:hover::before {
        transform: scaleX(1);
    }

    .culture-item.visible {
        opacity: 1;
        transform: translateY(0);
    }

.culture-icon {
    width: 90px;
    height: 90px;
    background-color: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.culture-item:hover .culture-icon {
    background-color: var(--primary-color);
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.2); /* 阴影色同步主题 */
}

.culture-icon i {
    font-size: 40px;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

.culture-item:hover .culture-icon i {
    color: var(--white);
}

.culture-item h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.culture-item p {
    font-size: 15px;
    color: var(--text-medium);
    line-height: 1.7;
}

/* 团队介绍 */
.team-intro {
    margin-bottom: 120px;
    position: relative;
    padding-top: 30px;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 35px;
    margin-top: 60px;
}

.team-member {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
}

    .team-member.visible {
        opacity: 1;
        transform: translateY(0);
    }

    .team-member:hover {
        transform: translateY(-10px);
        box-shadow: var(--shadow-lg);
    }

.member-photo {
    width: 100%;
    height: 300px;
    overflow: hidden;
    position: relative;
}

    .member-photo::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 50%;
        background: linear-gradient(transparent, rgba(0, 0, 0, 0.3));
        z-index: 1;
        opacity: 0;
        transition: opacity 0.3s ease;
    }

.team-member:hover .member-photo::after {
    opacity: 1;
}

.member-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.team-member:hover .member-photo img {
    transform: scale(1.08);
}

.member-social {
    position: absolute;
    bottom: 20px;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 15px;
    z-index: 2;
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition);
}

.team-member:hover .member-social {
    opacity: 1;
    transform: translateY(0);
}

.member-social a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition);
}

    .member-social a:hover {
        background: var(--primary-color);
        color: var(--white);
        transform: scale(1.1);
    }

.member-info {
    padding: 30px 25px;
    text-align: center;
}

    .member-info h3 {
        font-size: 20px;
        margin-bottom: 5px;
        color: var(--text-dark);
    }

.member-title {
    color: var(--primary-color);
    font-size: 16px;
    margin-bottom: 15px;
    font-weight: 500;
}

.member-bio {
    font-size: 14px;
    color: var(--text-medium);
    line-height: 1.6;
}

/* 荣誉资质 */
.honors {
    margin-bottom: 100px;
    position: relative;
    padding-top: 30px;
}

.honors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.honor-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 25px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
}

    .honor-item.visible {
        opacity: 1;
        transform: translateY(0);
    }

    .honor-item:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-lg);
    }

    .honor-item img {
        max-width: 100%;
        max-height: 160px;
        object-fit: contain;
        margin-bottom: 20px;
        transition: transform 0.5s ease;
    }

    .honor-item:hover img {
        transform: scale(1.05);
    }

    .honor-item p {
        font-size: 15px;
        color: var(--text-dark);
        font-weight: 500;
    }

/* 合作伙伴 */
.partners {
    margin-bottom: 120px;
    position: relative;
    padding-top: 30px;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 60px 20px;
    box-shadow: var(--shadow-md);
}

.partner-slider {
    margin-top: 40px;
    overflow: hidden;
    position: relative;
}

.partner-track {
    display: flex;
    animation: scrollPartners 20s linear infinite;
    width: calc(200px * 12);
}

.partner-item {
    width: 200px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
}

    .partner-item img {
        max-width: 100%;
        max-height: 80px;
        object-fit: contain;
        filter: grayscale(100%);
        transition: var(--transition);
        opacity: 0.7;
    }

    .partner-item:hover img {
        filter: grayscale(0);
        opacity: 1;
        transform: scale(1.1);
    }

/* 页脚 */
footer {
    background-color: var(--text-dark);
    color: var(--white);
    padding: 80px 0 40px;
    margin-top: 80px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-col h3 {
    font-size: 20px;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
    color: var(--white);
}

    .footer-col h3::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 50px;
        height: 3px;
        background-color: var(--primary-color);
    }

.footer-col p {
    font-size: 14px;
    color: #ccc;
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

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

    .footer-links a {
        color: #ccc;
        text-decoration: none;
        font-size: 14px;
        transition: var(--transition);
    }

        .footer-links a:hover {
            color: var(--primary-color);
            padding-left: 5px;
        }

.footer-contact {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

    .footer-contact i {
        color: var(--primary-color);
        width: 24px;
        text-align: center;
    }

.footer-bottom {
    max-width: 1200px;
    margin: 50px auto 0;
    padding: 20px;
    text-align: center;
    border-top: 1px solid #444;
    font-size: 14px;
    color: #aaa;
}

/* 在线客服悬浮按钮 */
.floating-service {
    position: fixed;
    right: 30px;
    bottom: 30px;
    z-index: 998;
}

.service-toggle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3); /* 阴影色同步主题 */
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

    .service-toggle:hover {
        transform: scale(1.1);
        background: var(--primary-dark);
    }

.service-panel {
    position: absolute;
    right: 0;
    bottom: 70px;
    width: 280px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 20px;
    display: none;
    overflow: hidden;
}

    .service-panel::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 4px;
        background: var(--primary-color);
    }

    .service-panel.active {
        display: block;
        animation: fadeIn 0.3s ease;
    }

    .service-panel h4 {
        font-size: 18px;
        margin-bottom: 15px;
        text-align: center;
        color: var(--text-dark);
        padding-top: 5px;
    }

.service-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.service-option {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px;
    border-radius: var(--radius-sm);
    background: #f9f9f9;
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    color: var(--text-dark);
}

    .service-option:hover {
        background: var(--primary-light);
        transform: translateX(5px);
    }

    .service-option i {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
    }

.service-qq i {
    background: #12b7f5;
    color: var(--white);
}

.service-phone i {
    background: var(--primary-color);
    color: var(--white);
}

.service-wechat i {
    background: #7bb32e;
    color: var(--white);
}

.service-info h5 {
    font-size: 16px;
    margin-bottom: 3px;
}

.service-info p {
    font-size: 14px;
    color: var(--text-medium);
}

.wechat-image-container {
    text-align: center;
    padding: 10px 0;
}

    .wechat-image-container img {
        width: 100%;
        max-width: 220px;
        border-radius: var(--radius-sm);
        box-shadow: var(--shadow-sm);
        margin: 10px 0;
    }

/* 通用样式 */
.section-title {
    font-size: 36px;
    margin-bottom: 30px;
    color: var(--text-dark);
    position: relative;
    display: inline-block;
    padding-bottom: 10px;
}

    .section-title::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 60px;
        height: 3px;
        background-color: var(--primary-color);
        border-radius: 2px;
    }

.section-desc {
    font-size: 16px;
    color: var(--text-medium);
    margin-bottom: 40px;
    max-width: 700px;
    line-height: 1.8;
}

/* 服务说明文字样式 - 左侧内容区 */
.service-intro {
    background: var(--primary-light);
    border-left: 4px solid var(--primary-color);
    padding: 25px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 30px;
    line-height: 1.8;
    color: var(--text-dark);
    position: relative;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.08); /* 阴影色同步主题 */
    transition: transform 0.3s ease;
}

    .service-intro:hover {
        transform: translateX(5px);
    }

    .service-intro::before {
        content: '\f013';
        font-family: "Font Awesome 6 Free";
        font-weight: 900;
        position: absolute;
        top: -12px;
        left: 25px;
        background: var(--primary-color);
        color: var(--white);
        width: 24px;
        height: 24px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 14px;
        box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3); /* 阴影色同步主题 */
    }

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bgFloat {
    from {
        transform: scale(1.02) translateX(0);
    }

    to {
        transform: scale(1.05) translateX(5%);
    }
}

@keyframes scrollPartners {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(calc(-200px * 6));
    }
}

/* 响应式调整 */
@media (max-width: 992px) {
    .development-history {
        flex-direction: column;
    }

    .company-intro-sidebar {
        flex: none;
        width: 100%;
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 30px;
    }

    .nav-links a {
        margin: 0 8px;
        font-size: 14px;
    }

    .contact-btn {
        padding: 6px 12px;
        font-size: 14px;
    }

    .page-header {
        height: 300px;
    }

    .header-content h1 {
        font-size: 36px;
    }

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

    .partner-track {
        width: calc(160px * 12);
    }

    .partner-item {
        width: 160px;
    }
}

@media (max-width: 576px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block !important;
        font-size: 24px;
        color: var(--text-dark);
        cursor: pointer;
    }

    .page-header {
        height: 260px;
    }

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

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

    .section-desc {
        font-size: 15px;
    }

    .sidebar-stat-item {
        min-width: 100px;
        padding: 10px 5px;
    }

    .sidebar-stat-number {
        font-size: 20px;
    }

    .service-panel {
        width: 250px;
    }

    .culture-grid, .team-grid {
        gap: 25px;
    }

    .partner-item {
        width: 120px;
    }

    .partner-track {
        width: calc(120px * 12);
        animation: scrollPartners 15s linear infinite;
    }
}

.mobile-menu-btn {
    display: none;
}