:root {
    --text-primary: #222;
    --text-secondary: #666;
    --text-muted: #999;
    --border-color: #eee;
    --background-light: #fafafa;
    --accent-color: #d33;
    --spacing-unit: 20px;
    --max-content-width: 1200px;
    --header-height: 80px;
    --gradient-primary: #c62828;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

.hide {
    display: none !important;
}

.scroll_bar::-webkit-scrollbar {
    width: 5px;
    height: 10px;
    background-color: #e1e1e1;
    border-radius: 10px;
}

.scroll_bar::-webkit-scrollbar-thumb {
    width: 2px;
    height: 5px;
    background-color: #e1e1e1;
    border-radius: 10px;
}

body {
    background-color: white;
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.container {
    width: 100%;
    max-width: var(--max-content-width);
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 300;
    margin-bottom: 20px;
    color: #8e0000;
    font-weight: bold;
    line-height: 1.2;
    /*width: 1200px;*/
    margin: 0 auto;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    /*max-width: 700px;*/
    margin-bottom: 60px;
}

.btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 10px 25px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 8px rgba(198, 40, 40, 0.2);
    /*display: inline-block;
            padding: 14px 32px;
            border-radius: 2px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
            font-size: 1rem;*/
}

.btn-primary {
    background-color: var(--gradient-primary);
    /*background-color: var(--text-primary);*/
    color: white;
}

    .btn-primary:hover {
        /*background-color: #444;*/
        background-color: #E16F6F;
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    }

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

    .btn-outline:hover {
        border-color: #ccc;
        background-color: rgba(0,0,0,0.02);
    }

/* 合作伙伴区域白色按钮 */
.partners-section .btn-outline {
    background-color: white;
}

    .partners-section .btn-outline:hover {
        background-color: white;
        border-color: #ccc;
    }

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

.mb-30 {
    margin-bottom: 30px;
}

.mb-50 {
    margin-bottom: 50px;
}

.mb-80 {
    margin-bottom: 80px;
    width: 1200px;
    margin: 0 auto;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    z-index: 1000;
    height: var(--header-height);
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

    .navbar.scrolled {
        background: rgba(255, 255, 255, 0.98);
        border-bottom: 1px solid var(--border-color);
    }

        .navbar.scrolled .logo,
        .navbar.scrolled .nav-links a,
        .navbar.scrolled .mobile-menu-btn {
            color: var(--text-primary);
        }

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.6rem;
    font-weight: 300;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    color: white;
}

.navbar.scrolled .logo {
    /*color: var(--text-primary);*/
    color: var(--gradient-primary);
}

.logo i {
    margin-right: 10px;
    color: inherit;
    font-size: 1.6rem;
}

.logo span {
    font-weight: 600;
    color: inherit;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
    font-weight: 500;
}

    .nav-links a {
        position: relative;
        padding: 5px 0;
        color: rgba(255, 255, 255, 0.9);
    }

.navbar.scrolled .nav-links a {
    color: var(--text-primary);
}

.nav-links a:hover {
    color: white;
}

.navbar.scrolled .nav-links a:hover {
    color: var(--text-primary);
}

/* 修复导航菜单活动状态指示条 */
.nav-links a.active {
    color: white;
}

.navbar.scrolled .nav-links a.active {
    color: var(--text-primary);
}

/* 导航菜单指示条样式 */
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: white;
    transition: width 0.3s ease;
}

.navbar.scrolled .nav-links a::after {
    background-color: var(--text-primary);
}

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

.nav-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: white;
}

.navbar.scrolled .mobile-menu-btn {
    color: var(--text-primary);
}

/* ===== 主视觉区域 ===== */
.hero {
    padding-top: calc(var(--header-height) + 80px);
    padding-bottom: 120px;
    background: linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.4)), url('https://images.unsplash.com/photo-1487956382158-bb926046304a?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
    position: relative;
    color: white;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.hero h1 {
    font-size: 3.8rem;
    font-weight: 300;
    margin-bottom: 30px;
    color: white;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.4rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 50px;
    line-height: 1.8;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 1px 5px rgba(0,0,0,0.2);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero .btn-primary {
    background-color: white;
    color: var(--text-primary);
}

    .hero .btn-primary:hover {
        background-color: #f0f0f0;
        transform: translateY(-2px);
    }

.hero .btn-outline {
    border-color: white;
    color: white;
    background-color: transparent;
}

    .hero .btn-outline:hover {
        background-color: rgba(255, 255, 255, 0.1);
        border-color: rgba(255, 255, 255, 0.8);
    }

/* ===== 数据统计区域 ===== */
.stats-section {
    background-color: var(--background-light);
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
}

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

.stat-number {
    font-size: 3.2rem;
    font-weight: 500;
    color: #c62828;
    margin-bottom: 10px;
    line-height: 1;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ===== 服务流程区域 ===== */
.services-section {
    padding: 100px 0;
    background-color: var(--background-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 60px;
}

@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.service-card {
    text-align: center;
    padding: 40px 25px;
    border-radius: 4px;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    height: 100%;
    display: flex;
    flex-direction: column;
    background-color: white;
}

    .service-card:hover {
        background-color: rgba(0,0,0,0.02);
        transform: translateY(-10px);
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    }

.service-icon {
    width: 80px;
    height: 80px;
    background-color: #f5f5f5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    color: var(--text-primary);
    font-size: 2rem;
}

.service-title {
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: #333;
    font-weight: 500;
    height: 3.2em;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.service-description {
    color: var(--text-secondary);
    line-height: 1.7;
    flex-grow: 1;
}

/* ===== 精选项目展示 ===== */
.activity-showcase {
    background-color: white;
    padding: 100px 0;
}

.showcase-header {
    /*display: flex;*/
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 60px;
    flex-wrap: wrap;
    gap: 20px;
    text-align: center;
}

    .showcase-header .section-title {
        margin-bottom: 0;
    }

.activity-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

@media (max-width: 1024px) {
    .activity-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.project-card {
    background-color: white;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: all 0.4s ease;
    border: 1px solid var(--border-color);
}

    .project-card:hover {
        transform: translateY(-15px);
        box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    }

.project-image {
    height: 240px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.project-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
    padding: 20px;
    color: white;
}

.project-location {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.project-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: white;
}

.project-content {
    padding: 25px;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

    .project-meta .project-date {
        width: 140px;
    }

    .project-meta .project-dcs {
        width: 190px;
        height: 24px;
        overflow: hidden;
        white-space: nowrap;
        text-overflow: ellipsis;
    }

.project-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
    height: 80px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    background-color: #e8f5e9;
    /*color: var(--text-secondary);*/
    color: #2e7d32;
    padding: 5px 12px;
    border-radius: 30px;
    font-size: 0.85rem;
}

.tag2 {
    background-color: #F8E0E0;
    color: #C62828;
    padding: 5px 12px;
    border-radius: 30px;
    font-size: 0.85rem;
}

/* ===== 合作企业展示 ===== */
.partners-section {
    padding: 100px 0;
    background-color: var(--background-light); /* 调整为灰色背景 */
}

.partner-logos {
    display: grid;
    grid-template-columns: repeat(6, 1fr); /* 一行6个 */
    gap: 15px; /* 减小间距，更密集 */
    margin-top: 60px;
    /*margin-bottom: 60px;*/
    align-items: center;
    justify-items: center;
}

@media (max-width: 1400px) {
    .partner-logos {
        grid-template-columns: repeat(5, 1fr);
        gap: 15px;
    }
}

@media (max-width: 1200px) {
    .partner-logos {
        grid-template-columns: repeat(4, 1fr);
        gap: 15px;
    }
}

@media (max-width: 992px) {
    .partner-logos {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }
}

@media (max-width: 768px) {
    .partner-logos {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
}

@media (max-width: 576px) {
    .partner-logos {
        grid-template-columns: 1fr;
        gap: 15px;
    }
}

.partner-logo {
    width: 100%; /* 缩小宽度 */
    height: 130px; /* 缩小高度 */
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: white; /* Logo卡片保持白色背景 */
    border-radius: 6px;
    padding: 0 15px; /* 减小内边距 */
    border: 1px solid #e0e0e0;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

    .partner-logo:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        border-color: #ccc;
    }

.logo-placeholder {
    font-weight: 600;
    font-size: 0.95rem; /* 缩小字体 */
    color: #333;
    text-align: center;
    line-height: 1.3;
}

    .logo-placeholder .logo {
        /*display: flex;
        flex-wrap: wrap;*/
        width: 140px;
        height: 70px;
    }

        .logo-placeholder .logo img {
            /*flex-grow: 1;
            object-fit: cover;*/
            max-width: 140px;
            max-height: 70px;
            margin: 0 auto;
        }

    .logo-placeholder .gsmc {
        font-size: 0.9rem; /* 缩小英文名称字体 */
        color: #666;
        margin-top: 5px;
    }

/* ===== 全国业务覆盖 - 保留框架 ===== */
.china-map-section {
    padding: 100px 0;
    background-color: white;
}

.china-map-container {
    /*height: 600px;*/
    height: 650px;
    background-color: #f8fbfd;
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    margin-top: 60px;
    border: 1px solid #e1e8ed;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.info_win {
    position: absolute;
    width: 400px;
    background-color: #ffffff;
    margin-top: -640px;
    right: 30px;
    border-radius: 5px;
    z-index: 999;
    overflow-x: hidden;
    max-height: 630px;
}

    .info_win .closebtn {
        position: absolute;
        color: #ffffff;
        margin: 5px 0 0 335px;
        background-color: #909399;
        width: 60px;
        height: 24px;
        border-radius: 5px;
        font-size: 13px;
        line-height: 24px;
        cursor: pointer;
        -webkit-user-select: none; /* Chrome/Safari/Opera */
        -moz-user-select: none; /* Firefox */
        -ms-user-select: none; /* IE/Edge */
        user-select: none; /* Standard syntax */
    }

    .info_win .top_img {
        width: 400px;
        height: 116px;
        display: flex;
        flex-wrap: wrap;
    }

        .info_win .top_img img {
            width: 400px;
            height: 116px;
            flex-grow: 1;
            object-fit: cover;
        }

    .info_win .basic {
        margin: 5px 20px 20px 20px;
        text-align: left;
        font-size: 14px;
        color: #999999;
    }

        .info_win .basic span {
            margin-right: 20px;
        }

    .info_win h3 {
        font-size: 17px;
        text-align: left;
        margin: 20px 20px 0px 20px;
    }

    .info_win .nav {
        margin: 0 20px;
        text-align: left;
        border-bottom: 2px solid #e1e1e1;
        margin-bottom: 20px;
        display: flex;
        height: 30px;
        -webkit-user-select: none; /* Chrome/Safari/Opera */
        -moz-user-select: none; /* Firefox */
        -ms-user-select: none; /* IE/Edge */
        user-select: none; /* Standard syntax */
    }

        .info_win .nav span {
            display: block;
            float: left;
            font-size: 15px;
            margin-right: 10px;
            cursor: pointer;
        }

            .info_win .nav span:hover {
                color: #D34942;
            }

        .info_win .nav .active {
            color: #D34942;
            border-bottom: 2px solid #D34942;
            height: 30px;
        }

    .info_win .info_box {
        margin: 0 20px 20px 20px;
    }

    .info_win .jj {
        text-align: left;
        font-size: 16px;
    }

    .info_win .tp img {
        width: 360px;
        margin-bottom: 10px;
    }

    .info_win .sp {
    }

/* ===== 演讲嘉宾区域 ===== */
.speakers-section {
    padding: 100px 0;
    background-color: white; /* 调整为白色背景 */
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr); /* 一行8个 */
    gap: 15px; /* 缩小间距，更密集 */
    margin-top: 60px;
    margin-bottom: 60px;
}

    /* 默认只显示前两行 */
    .speakers-grid .speaker-card:nth-child(n+17) {
        display: none;
    }

    /* 显示全部嘉宾时的样式 */
    .speakers-grid.show-all .speaker-card {
        display: flex !important;
    }

@media (max-width: 1600px) {
    .speakers-grid {
        grid-template-columns: repeat(6, 1fr);
        gap: 15px;
    }
}

@media (max-width: 1400px) {
    .speakers-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 15px;
    }
}

@media (max-width: 1200px) {
    .speakers-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 15px;
    }
}

@media (max-width: 992px) {
    .speakers-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }
}

@media (max-width: 768px) {
    .speakers-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
}

@media (max-width: 576px) {
    .speakers-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
}

.speaker-card {
    text-align: center;
    padding: 18px 12px; /* 减小内边距，更紧凑 */
    background: white;
    border-radius: 6px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid var(--border-color);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

    .speaker-card:hover {
        transform: translateY(-8px);
        box-shadow: 0 12px 25px rgba(0,0,0,0.1);
        border-color: #ccc;
    }

.speaker-avatar {
    width: 108px; /* 进一步缩小头像大小 */
    height: 108px; /* 进一步缩小头像大小 */
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 12px;
    border: 2px solid #f5f5f5; /* 减小边框 */
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem; /* 缩小图标大小 */
    color: #ccc;
    overflow: hidden;
}

    .speaker-avatar img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

.speaker-name {
    font-size: 0.95rem; /* 缩小姓名字体 */
    font-weight: 600;
    margin-bottom: 5px;
    color: #333;
}

.speaker-title {
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 0;
    font-size: 0.75rem; /* 缩小职务字体 */
    line-height: 1.3; /* 调整行高 */
}

/* 演讲嘉宾弹窗样式 */
.speaker-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

    .speaker-modal.active {
        display: flex;
    }

.modal-content {
    background-color: white;
    border-radius: 12px;
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

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

.modal-header {
    padding: 30px 40px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

    .modal-header h3 {
        font-size: 1.8rem;
        margin: 0;
        color: #333;
    }

.modal-close {
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.3s;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

/*.modal-close:hover {
        color: var(--text-primary);
        background-color: rgba(0,0,0,0.05);
    }*/

.modal-body {
    padding: 30px 40px;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
}

@media (max-width: 768px) {
    .modal-body {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

.modal-avatar {
    width: 200px;
    height: 280px;
    border-radius: 10px;
    object-fit: cover;
    border: 5px solid #f5f5f5;
    margin: 0 auto;
    display: block;
    background-color: #f5f5f5;
    font-size: 4rem;
    color: #ccc;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

    .modal-avatar img {
        width: 100%;
        max-height: 100%;
        object-fit: cover;
    }

.modal-info h4 {
    font-size: 1.4rem;
    margin: 0 0 10px 0;
    color: #333;
}

.modal-info .modal-title {
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 25px;
    font-size: 1.1rem;
}

.modal-info .modal-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 30px;
}

.modal-footer {
    padding: 20px 40px 30px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

/* ===== 联系信息板块 ===== */
.contact-section {
    padding: 100px 0;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
    margin-top: 20px;
}

@media (max-width: 768px) {
    .contact-container {
        grid-template-columns: 1fr;
        gap: 50px;
    }
}

.contact-method {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
    gap: 20px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: #f5f5f5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.contact-details p {
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 25px;
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

    .form-control:focus {
        outline: none;
        border-color: #999;
    }

/* ===== 页脚 ===== */
footer {
    background-color: #111;
    color: #aaa;
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 50px;
    margin-bottom: 60px;
}

.footer-column h3 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    color: white;
    font-weight: 500;
}

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

    .footer-links li {
        margin-bottom: 15px;
    }

    .footer-links a {
        color: #aaa;
        transition: color 0.3s;
    }

        .footer-links a:hover {
            color: white;
        }

.contact-info p {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.contact-info i {
    color: #666;
    width: 20px;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

    .social-links a {
        width: 40px;
        height: 40px;
        background-color: #222;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #aaa;
        transition: all 0.3s;
    }

        .social-links a:hover {
            background-color: #333;
            color: white;
            transform: translateY(-3px);
        }

.newsletter-form {
    display: flex;
    margin-top: 20px;
}

.newsletter-input {
    flex: 1;
    padding: 14px 15px;
    background-color: #222;
    border: 1px solid #333;
    color: white;
    outline: none;
    font-size: 1rem;
}

.newsletter-btn {
    background-color: #333;
    color: white;
    border: none;
    padding: 0 25px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s;
}

    .newsletter-btn:hover {
        background-color: #444;
    }

.copyright {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid #222;
    color: #666;
    font-size: 0.9rem;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 3.2rem;
    }

    .section-title {
        font-size: 2.5rem;
    }
}

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

    .nav-links {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    }

        .nav-links.active {
            display: flex;
            background-color: rgba(255, 255, 255, 0.98);
        }

        .nav-links a {
            color: var(--text-primary);
        }

    .hero {
        padding-top: calc(var(--header-height) + 60px);
        padding-bottom: 80px;
    }

        .hero h1 {
            font-size: 2.5rem;
        }

        .hero p {
            font-size: 1.2rem;
        }

    .section {
        padding: 70px 0;
    }

    .section-title {
        font-size: 2.2rem;
    }

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

        .hero-buttons .btn {
            width: 100%;
            max-width: 300px;
        }

    .partner-logos {
        gap: 15px;
    }

    .partner-logo {
        width: 120px;
        height: 65px;
        padding: 10px 12px;
    }

    .china-map-container {
        height: 450px;
    }

    .speakers-grid {
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

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

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

    .partner-logos {
        gap: 10px;
    }

    .partner-logo {
        width: 100px;
        height: 55px;
        padding: 8px 10px;
    }

    .china-map-container {
        height: 400px;
    }

    .speakers-grid {
        gap: 12px;
    }

    .speaker-card {
        padding: 15px 10px;
    }
}

.fa-solid, .fas {
    color: #c62828;
}

/* 历史活动====开始 */
/* ===== 页面头部 ===== */
.page-header {
    padding-top: calc(var(--header-height) + 80px);
    padding-bottom: 60px;
    background: linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.4)), url('https://images.unsplash.com/photo-1487956382158-bb926046304a?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
    position: relative;
    color: white;
}

.page-header-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.page-header h1 {
    font-size: 3.8rem;
    font-weight: 300;
    margin-bottom: 20px;
    color: white;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.page-header p {
    font-size: 1.4rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
    line-height: 1.8;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 1px 5px rgba(0,0,0,0.2);
}

/* ===== 筛选区域 ===== */
.filters-section {
    padding: 60px 0 30px;
    background-color: var(--background-light);
}

.filters-container {
    /*display: grid;*/
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    align-items: center;
}

@media (max-width: 768px) {
    .filters-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

.search-box {
    position: relative;
}

.search-input {
    width: 100%;
    padding: 14px 50px 14px 50px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
    background-color: white;
}

    .search-input:focus {
        outline: none;
        border-color: #999;
    }

.search-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-reset {
    position: absolute;
    right: 15px;
    top: 46%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 26px;
    cursor: pointer;
}

.filter-controls {
    display: flex;
    gap: 15px;
}

@media (max-width: 576px) {
    .filter-controls {
        flex-direction: column;
    }
}

.filter-select {
    flex: 1;
    padding: 14px 20px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    background-color: white;
    color: var(--text-primary);
    cursor: pointer;
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 30px;
}

.filter-tag {
    padding: 8px 18px;
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

    .filter-tag:hover {
        background-color: #f5f5f5;
        border-color: #ccc;
    }

    .filter-tag.active {
        background-color: var(--gradient-primary);
        color: white;
        border-color: var(--gradient-primary);
    }

/* ===== 项目列表 ===== */
.projects-list-section {
    padding: 60px 0 100px;
    background-color: white;
}

.projects-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 20px;
}

.projects-count {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.sort-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.sort-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.sort-select {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.95rem;
    background-color: white;
    color: var(--text-primary);
    cursor: pointer;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

.project-card {
    background-color: white;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: all 0.4s ease;
    border: 1px solid var(--border-color);
    height: 100%;
    display: flex;
    flex-direction: column;
}

    .project-card:hover {
        transform: translateY(-15px);
        box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    }

.project-image {
    height: 240px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.project-year {
    position: absolute;
    top: 20px;
    left: 20px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 5px 12px;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
}

.project-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
    padding: 20px;
    color: white;
}

.project-location {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.project-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: white;
    height: 38px;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.project-content {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
    height: 84px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.project-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.feature-tag {
    background-color: #f5f5f5;
    color: var(--text-secondary);
    padding: 5px 12px;
    border-radius: 30px;
    font-size: 0.85rem;
}

.project-footer {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.project-status {
    font-size: 0.9rem;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 4px;
}

.status-recruitment {
    background-color: #e8f5e9;
    color: #2e7d32;
}

.status-completed {
    background-color: #F8E0E0;
    color: #C62828;
}

.status-ongoing {
    background-color: #e3f2fd;
    color: #ffffff;
}

.status-upcoming {
    background-color: #fff3e0;
    color: #ef6c00;
}

.project-link {
    color: var(--gradient-primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color 0.3s;
}

    .project-link:hover {
        color: #8e0000;
    }

.project-notfound {
    text-align: center;
    height: 200px;
    color: #8E0000;
    font-size: 16px;
}
/* ===== 分页 ===== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 60px;
}

.pagination-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: white;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

    .pagination-btn:hover:not(:disabled) {
        background-color: #f5f5f5;
        border-color: #ccc;
    }

    .pagination-btn.active {
        background-color: var(--gradient-primary);
        color: white;
        border-color: var(--gradient-primary);
    }

    .pagination-btn:disabled {
        opacity: 0.5;
        cursor: not-allowed;
    }

.pagination-dots {
    padding: 0 5px;
    color: var(--text-muted);
}
/* 历史活动====结束 */

/* 滚动横幅===开始 */
.hero-banner {
    /*position: relative;
    width: 100%;
    height: 560px;*/ /* 修改为固定高度560px */
    /*overflow: hidden;
    background-color: #0a1a2d;*/


    position: relative;
    width: 100%;
    height: 640px;
    overflow: hidden;
    background-color: #0a1a2d;
    /*padding-top: 80px;*/
}

.banner-slides {
    width: 100%;
    height: 100%;
    position: relative;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

    .slide.active {
        opacity: 1;
    }

.slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: brightness(0.9);
}

.slide-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    width: 90%;
    padding: 2rem;
    color: white;
    text-align: center;
    top: 200px;
}

    .slide-content h1 {
        font-size: 2.8rem; /* 稍微减小以适应新高度 */
        margin-bottom: 1.2rem;
        font-weight: 700;
        text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        opacity: 0;
        transform: translateY(30px);
        transition: all 0.8s ease 0.2s;
    }

.slide.active .slide-content h1 {
    opacity: 1;
    transform: translateY(0);
    height: 76px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.slide-content p {
    font-size: 1.2rem; /* 稍微减小以适应新高度 */
    max-width: 800px;
    margin: 0 auto 1.8rem;
    line-height: 1.7;
    text-shadow: 0 1px 5px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease 0.4s;
}

.slide.active .slide-content p {
    opacity: 1;
    transform: translateY(0);
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1.8rem;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease 0.6s;
}

.slide.active .hero-buttons {
    opacity: 1;
    transform: translateY(0);
}

.btn {
    display: inline-block;
    padding: 0.85rem 2rem; /* 稍微减小以适应新高度 */
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.05rem; /* 稍微减小以适应新高度 */
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: #c19a6b;
    color: white;
    border: 2px solid #c19a6b;
}

    .btn-primary:hover {
        background-color: #b08951;
        border-color: #b08951;
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    }

.banner-btn-outline {
    background-color: #ffffff;
    color: #C19A6B;
    border: 2px solid #C19A6B;
}

    .banner-btn-outline:hover {
        background-color: #ffffff;
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    }

.banner-controls {
    position: absolute;
    bottom: 20px; /* 调整位置以适应新高度 */
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

.slide-indicators {
    display: flex;
    gap: 12px;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s ease;
}

    .indicator.active {
        background-color: #c19a6b;
        transform: scale(1.2);
    }

    .indicator:hover {
        background-color: rgba(255, 255, 255, 0.7);
    }

.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.3);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10;
}

    .nav-btn:hover {
        background-color: rgba(0, 0, 0, 0.6);
    }

.prev-btn {
    left: 25px;
}

.next-btn {
    right: 25px;
}

.slide-counter {
    position: absolute;
    bottom: 20px; /* 调整位置以适应新高度 */
    right: 25px;
    color: white;
    font-size: 0.95rem;
    background-color: rgba(0, 0, 0, 0.4);
    padding: 4px 12px;
    border-radius: 20px;
    z-index: 10;
}

.slide-title {
    position: absolute;
    bottom: 60px; /* 调整位置以适应新高度 */
    left: 25px;
    color: white;
    font-size: 1.1rem;
    background-color: rgba(0, 0, 0, 0.4);
    padding: 6px 12px;
    border-radius: 5px;
    z-index: 10;
    max-width: 300px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-banner {
        height: 500px; /* 在中等屏幕上稍微减小高度 */
    }

    .slide-content h1 {
        font-size: 2.3rem;
    }

    .slide-content p {
        font-size: 1.05rem;
    }

    .nav-btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .prev-btn {
        left: 15px;
    }

    .next-btn {
        right: 15px;
    }

    .slide-title {
        max-width: 250px;
        font-size: 1rem;
    }
}

@media (max-width: 768px) {
    .hero-banner {
        height: 450px; /* 在平板上进一步减小高度 */
    }

    .slide-content h1 {
        font-size: 1.9rem;
    }

    .slide-content p {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        margin-top: 1.5rem;
    }

    .btn {
        width: 80%;
        max-width: 280px;
        padding: 0.75rem 1.8rem;
        font-size: 1rem;
    }

    .slide-title {
        left: 50%;
        transform: translateX(-50%);
        width: 90%;
        text-align: center;
        bottom: 80px;
        max-width: none;
        white-space: normal;
    }

    .slide-counter {
        right: 50%;
        transform: translateX(50%);
        bottom: 20px;
    }

    .banner-controls {
        bottom: 15px;
    }
}

@media (max-width: 576px) {
    .hero-banner {
        height: 400px; /* 在手机上进一步减小高度 */
    }

    .slide-content h1 {
        font-size: 1.7rem;
        margin-bottom: 1rem;
    }

    .slide-content p {
        font-size: 0.9rem;
        margin-bottom: 1.2rem;
    }

    .btn {
        padding: 0.7rem 1.5rem;
        font-size: 0.95rem;
    }

    .slide-title {
        font-size: 0.9rem;
        bottom: 70px;
        padding: 5px 10px;
    }
}

@media (max-width: 400px) {
    .hero-banner {
        height: 380px; /* 在非常小的屏幕上再次减小高度 */
    }

    .slide-content h1 {
        font-size: 1.5rem;
    }

    .slide-content p {
        font-size: 0.85rem;
    }
}
/* 滚动横幅====结束 */