/* ================= 全局变量与基础样式 ================= */
        :root {
            --primary-color: #0056b3; /* 主色调 */
            --secondary-color: #004494; /* 主色加深（悬停） */
            --accent-color: #ff9800; /* 强调色（CTA 按钮等） */
            --text-main: #333333;
            --text-light: #666666;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --transition: all 0.3s ease;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: var(--text-main); background-color: var(--bg-white); }
        a { text-decoration: none; color: inherit; }
        ul { list-style: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

        /* ================= 顶部导航栏 ================= */
        header.navbar { background: var(--bg-white); box-shadow: 0 2px 10px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 1000; padding: 15px 0; }
        .nav-container { display: flex; justify-content: space-between; align-items: center; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .logo { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: bold; color: var(--primary-color); }
        .logo-mark {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .logo-mark img {
            display: block;
            height: 40px;
            width: auto;
            max-width: 180px;
            object-fit: contain;
            border-radius: 4px;
        }
        .logo-text {
            white-space: nowrap;
            font-size: 1.2rem;
            line-height: 1;
        }
        .nav-links { display: flex; gap: 20px; align-items: center; }
        .nav-links a { font-weight: 500; transition: var(--transition); }
        .nav-links a:hover { color: var(--primary-color); }

        .lang-switch { display: flex; gap: 8px; align-items: center; margin-left: 10px; }
        .lang-btn { 
            padding: 0 10px; 
            min-width: 36px;
            height: 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            line-height: 1;
            border-radius: 4px; 
            border: 1px solid var(--primary-color); 
            background: transparent; 
            color: var(--primary-color); 
            font-size: 0.85rem; 
            cursor: pointer; 
            transition: var(--transition);
        }
        .lang-btn:hover, .lang-btn.active { 
            background: var(--primary-color); 
            color: #ffffff; 
        }

        /* ================= 首屏 Hero Section ================= */
        .hero { 
            /* 深色遮罩叠加机柜背景图，保证标题文字可读性 */
            background: linear-gradient(rgba(0, 32, 64, 0.8), rgba(0, 32, 64, 0.8)), url('../logo/Network_Cabinet.jpg') no-repeat center center/cover;
            color: white; padding: 120px 20px; text-align: center; 
        }
        .hero h1 { font-size: 3rem; margin-bottom: 20px; }
        .hero h2 { font-size: 1.5rem; font-weight: 400; margin-bottom: 20px; color: #e0e0e0; }
        .hero p { font-size: 1.1rem; max-width: 800px; margin: 0 auto 40px; color: #cccccc; }
        .btn { display: inline-block; padding: 12px 30px; border-radius: 5px; font-weight: bold; transition: var(--transition); cursor: pointer; border: none; }
        .btn-primary { background: var(--primary-color); color: white; margin-right: 15px; }
        .btn-primary:hover { background: var(--secondary-color); transform: translateY(-2px); }
        .btn-outline { background: transparent; border: 2px solid white; color: white; }
        .btn-outline:hover { background: white; color: var(--primary-color); transform: translateY(-2px); }

        /* ================= 核心服务卡片 (Card UI) ================= */
        .services { padding: 80px 0; background-color: var(--bg-light); }
        .section-title { text-align: center; font-size: 2.2rem; margin-bottom: 50px; color: var(--text-main); }
        .services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
        .service-card { background: var(--bg-white); padding: 40px 30px; border-radius: 10px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); transition: var(--transition); text-align: center; }
        .service-card:hover { transform: translateY(-10px); box-shadow: 0 15px 30px rgba(0,0,0,0.1); }
        .service-icon { font-size: 40px; color: var(--primary-color); margin-bottom: 20px; }
        .service-card h3 { margin-bottom: 15px; font-size: 1.3rem; }
        .service-card p { color: var(--text-light); font-size: 0.95rem; }
        .service-more {
            display: inline-block;
            margin-top: 12px;
            font-size: 0.85rem;
            color: var(--primary-color);
            cursor: pointer;
            transition: var(--transition);
        }
        .service-more:hover {
            color: var(--secondary-color);
        }

        /* ================= 公司优势（图文两栏） ================= */
        .why-us { padding: 80px 0; display: flex; align-items: center; gap: 50px; }
        .why-us-img { flex: 1; border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,0.1); width: 100%; height: auto; object-fit: cover; }
        .why-us-content { flex: 1; }
        .why-us-content h2 { font-size: 2.2rem; margin-bottom: 30px; }
        .advantage-item { display: flex; align-items: flex-start; margin-bottom: 20px; }
        .advantage-icon { color: var(--accent-color); font-size: 24px; margin-right: 15px; margin-top: 3px; }
        .advantage-text h4 { font-size: 1.1rem; margin-bottom: 5px; }
        .advantage-text p { color: var(--text-light); font-size: 0.95rem; }

        /* ================= 服务流程四步 ================= */
        .process { padding: 80px 0; background-color: var(--bg-light); text-align: center; }
        .process-steps { display: flex; justify-content: space-between; flex-wrap: wrap; margin-top: 50px; position: relative; }
        .step { flex: 1; min-width: 200px; padding: 20px; position: relative; }
        .step-number { width: 60px; height: 60px; background: var(--primary-color); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: bold; margin: 0 auto 20px; position: relative; z-index: 2; border: 5px solid var(--bg-light); }
        .step h4 { margin-bottom: 10px; font-size: 1.2rem; }
        .step p { color: var(--text-light); font-size: 0.9rem; }
        /* 流程步骤之间的连接线 */
        @media (min-width: 768px) {
            .step::after { content: ''; position: absolute; top: 50px; left: 50%; width: 100%; height: 2px; background: #dcdcdc; z-index: 1; }
            .step:last-child::after { display: none; }
        }

        /* ================= 客户信任与资质 ================= */
        .trust {
            padding: 80px 0;
            background: var(--bg-white);
        }
        .trust-grid {
            display: grid;
            grid-template-columns: 2fr 1.5fr 1.5fr;
            gap: 40px;
            margin-top: 40px;
        }
        .trust-group h3 {
            font-size: 1.2rem;
            margin-bottom: 15px;
        }
        .logo-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .logo-pill {
            padding: 6px 14px;
            border-radius: 999px;
            background: var(--bg-light);
            font-size: 0.9rem;
            color: var(--text-light);
            border: 1px solid #e0e0e0;
        }
        .cert-list li {
            position: relative;
            padding-left: 14px;
            margin-bottom: 8px;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .cert-list li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.6em;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-color);
        }

        /* ================= FAQ 常见问题 ================= */
        .faq {
            padding: 80px 0;
            background: var(--bg-light);
        }
        .faq-list {
            max-width: 900px;
            margin: 40px auto 0;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: 10px;
            padding: 18px 20px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.04);
            margin-bottom: 15px;
        }
        .faq-question {
            font-weight: 600;
            margin-bottom: 6px;
        }
        .faq-answer {
            font-size: 0.9rem;
            color: var(--text-light);
        }

        /* ================= 联系表单 ================= */
        .contact-section {
            padding: 60px 0 80px;
            background: var(--bg-white);
        }
        .contact-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 30px;
        }
        .contact-intro {
            flex: 1 1 260px;
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .contact-form-wrapper {
            flex: 1 1 320px;
            background: var(--bg-light);
            border-radius: 10px;
            padding: 24px 22px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.06);
        }
        .contact-form {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px 16px;
        }
        .contact-form .full-width {
            grid-column: 1 / -1;
        }
        .form-field label {
            display: block;
            font-size: 0.85rem;
            margin-bottom: 4px;
            color: var(--text-main);
        }
        .form-field input,
        .form-field textarea {
            width: 100%;
            padding: 8px 10px;
            border-radius: 6px;
            border: 1px solid #d0d0d0;
            font-size: 0.9rem;
            outline: none;
            transition: var(--transition);
            font-family: inherit;
        }
        .form-field input:focus,
        .form-field textarea:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 2px rgba(0,86,179,0.15);
        }
        .form-field textarea {
            resize: vertical;
            min-height: 80px;
        }
        .contact-submit {
            margin-top: 10px;
            text-align: right;
        }
        .contact-submit .btn {
            font-size: 0.95rem;
        }

        /* ================= 底部 CTA ================= */
        .bottom-cta { padding: 80px 20px; background: var(--primary-color); color: white; text-align: center; }
        .bottom-cta h2 { font-size: 2.5rem; margin-bottom: 20px; }
        .bottom-cta p { font-size: 1.2rem; margin-bottom: 30px; color: rgba(255,255,255,0.9); }
        .btn-cta { background: var(--accent-color); color: white; font-size: 1.1rem; padding: 15px 40px; }
        .btn-cta:hover { background: #e68a00; transform: translateY(-2px); box-shadow: 0 5px 15px rgba(0,0,0,0.2); }

        /* ================= 页脚 ================= */
        .footer { background: #1a1a1a; color: #cccccc; padding: 60px 0 20px; }
        .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 40px; margin-bottom: 40px; }
        .footer h4 { color: white; margin-bottom: 20px; font-size: 1.2rem; }
        .footer p, .footer li { font-size: 0.95rem; margin-bottom: 10px; }
        .footer a { transition: var(--transition); }
        .footer a:hover { color: var(--accent-color); }
        .footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid #333; font-size: 0.85rem; }
        .footer-bottom .icp-link { color: inherit; margin-left: 8px; }
        .footer-bottom .icp-link:hover { color: var(--accent-color); }

        /* ================= 项目案例页 ================= */
        .projects-hero {
            padding: 36px 20px 30px;
            background: var(--bg-light);
            color: var(--text-main);
            text-align: center;
        }
        .projects-hero h1 {
            font-size: 2rem;
            margin-bottom: 10px;
        }
        .projects-hero p {
            max-width: 720px;
            margin: 0 auto;
            color: var(--text-light);
            font-size: 0.95rem;
        }

        .projects-section {
            padding: 34px 0 70px;
            background: var(--bg-white);
        }
.project-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-auto-rows: 1fr;
    gap: 20px;
    margin-top: 20px;
}
.project-card {
    background: var(--bg-light);
    border-radius: 10px;
    padding: 25px 20px 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
    min-height: 320px;
    max-height: 320px;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    cursor: pointer;
}
.project-top {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
    margin-bottom: 10px;
}
.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0,0,0,0.12);
}
.project-tag {
    display: inline-block;
    font-size: 0.75rem;
    padding: 3px 8px;
    border-radius: 999px;
    background: rgba(0, 86, 179, 0.08);
    color: var(--primary-color);
    max-width: 100%;
    flex: 1 1 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.project-date {
    font-size: 0.75rem;
    color: var(--text-light);
    background: #eef3fb;
    padding: 3px 8px;
    border-radius: 999px;
}
.project-meta {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 1;
    overflow: hidden;
}
.project-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}
.project-desc {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    overflow: hidden;
    flex: 1;
}
.project-result {
    font-size: 0.84rem;
    color: var(--text-light);
    border-top: 1px dashed #e1e8f2;
    padding-top: 8px;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}
        .projects-section .section-title,
        .news-section .section-title {
            font-size: 2rem;
            margin-bottom: 18px;
        }

        /* ================= 资讯列表页 ================= */
        .news-section {
            padding: 34px 0 70px;
            background: var(--bg-white);
        }
        .news-list {
            max-width: 900px;
            margin: 0 auto;
        }
        .news-item {
            padding: 18px 0;
            border-bottom: 1px solid #e5e5e5;
        }
        .news-meta {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 4px;
        }
        .news-title {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
.news-summary {
    font-size: 0.9rem;
    color: var(--text-light);
}
.news-title-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition);
}
.news-title-link:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}
.news-empty {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-light);
    padding: 30px 0;
}
.list-pagination {
    margin-top: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}
.page-btn {
    min-width: 36px;
    height: 34px;
    padding: 0 10px;
    border-radius: 8px;
    border: 1px solid #cfdcec;
    background: #ffffff;
    color: #334255;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}
.page-btn:hover:not(:disabled) {
    border-color: var(--primary-color);
    color: var(--primary-color);
}
.page-btn.is-active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #ffffff;
}
.page-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

/* ================= Floating Home Button ================= */
.floating-home {
    position: fixed;
    right: 22px;
    bottom: 22px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    border-radius: 999px;
    background: var(--primary-color);
    color: #ffffff;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: 0 10px 24px rgba(0,0,0,0.18);
    transition: var(--transition);
    z-index: 999;
}
.floating-home:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
}
.floating-home-icon {
    font-size: 0.9rem;
    line-height: 1;
}

        /* ================= 响应式断点 ================= */
        @media (max-width: 992px) {
            .trust-grid {
                grid-template-columns: 1.5fr 1fr;
            }
            .project-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }
        }

        @media (max-width: 768px) {
            .hero h1 { font-size: 2.2rem; }
            .why-us { flex-direction: column; }
            .nav-container {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .nav-links {
                display: flex;
                flex-wrap: wrap;
                gap: 12px;
                width: 100%;
            }
            .trust-grid {
                grid-template-columns: 1fr;
            }
            .contact-grid {
                flex-direction: column;
            }
            .contact-form {
                grid-template-columns: 1fr;
            }
            .projects-hero {
                padding: 24px 14px 20px;
            }
            .projects-hero h1 {
                font-size: 1.58rem;
            }
            .projects-hero p {
                font-size: 0.9rem;
            }
        .project-grid {
            grid-template-columns: 1fr;
        }
        .project-card {
            min-height: 0;
            max-height: none;
        }
        .projects-section .section-title,
        .news-section .section-title {
            font-size: 1.55rem;
            margin-bottom: 14px;
        }
        .floating-home {
            right: 16px;
            bottom: 16px;
            padding: 8px 12px;
            font-size: 0.8rem;
        }
    }