* { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: 'Inter', sans-serif;
            background-color: #E6F4FF;
            color: #03396c;
            line-height: 1.4;
            scroll-behavior: smooth;
            overflow-x: hidden;
        }
        :root {
            --primary-deep: #0B3B5C;
            --sky-blue: #48B5E4;
            --soft-blue: #A3D8F4;
            --gradient-brand: linear-gradient(145deg, #c4e6ff 0%, #8ac9f0 100%);
            --gradient-sky: linear-gradient(135deg, #d4edff, #b0dff5);
            --light-bg: #F0F9FF;
            --card-shadow: 0 20px 35px -12px rgba(0, 80, 120, 0.12), 0 5px 12px -6px rgba(0, 50, 80, 0.05);
            --transition-default: all 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
        }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }
        section { padding: 100px 0; }

        /* 导航 */
        .navbar {
            position: fixed;
            top: 0; left: 0; width: 100%;
            background: rgba(235, 248, 255, 0.88);
            backdrop-filter: blur(16px);
            box-shadow: 0 2px 20px rgba(0, 80, 130, 0.06);
            z-index: 1000;
            transition: var(--transition-default);
            border-bottom: 1px solid rgba(72, 181, 228, 0.2);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 32px;
            max-width: 1400px;
            margin: 0 auto;
        }
        .logo {
            display: flex; align-items: baseline; gap: 6px;
            font-weight: 800; font-size: 1.8rem; letter-spacing: -0.02em;
            background: linear-gradient(135deg, #006994, #2b8cbe);
            background-clip: text; -webkit-background-clip: text; color: transparent;
            text-decoration: none;
        }
        .logo-sub { font-size: 0.9rem; font-weight: 500; color: #1f6f92; margin-left: 6px; }
        .nav-links { display: flex; gap: 40px; align-items: center; }
        .nav-links a { text-decoration: none; font-weight: 600; color: #03506f; transition: var(--transition-default); font-size: 1rem; }
        .nav-links a:hover { color: #0077be; }
        .nav-btn {
            background: linear-gradient(145deg, #3da2d0, #1f7aac);
            padding: 10px 24px; border-radius: 40px; color: white !important;
            font-weight: 600; box-shadow: 0 6px 14px rgba(42, 150, 210, 0.25);
        }
        .nav-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 20px rgba(42, 150, 210, 0.35); color: white !important; }
        .mobile-menu { display: none; font-size: 1.8rem; cursor: pointer; color: #03506f; }

        /* Hero */
        .hero {
            background: radial-gradient(circle at 20% 30%, #d4edff 0%, #b0dff5 100%);
            padding-top: 160px; padding-bottom: 80px;
            position: relative; overflow: hidden;
        }
        .hero .container { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 40px; }
        .hero-content { flex: 1; min-width: 280px; }
        .hero-badge {
            background: rgba(0, 119, 182, 0.12); color: #006994;
            padding: 6px 16px; border-radius: 40px; font-size: 0.85rem;
            font-weight: 600; display: inline-block; margin-bottom: 24px;
            backdrop-filter: blur(2px);
        }
        .hero-content h1 {
            font-size: 3.8rem; font-weight: 800; line-height: 1.2; letter-spacing: -0.02em;
            background: linear-gradient(145deg, #02457a, #3a8fcb);
            background-clip: text; -webkit-background-clip: text; color: transparent;
            margin-bottom: 20px;
        }
        .hero-content p { font-size: 1.2rem; color: #03506f; max-width: 550px; margin-bottom: 32px; line-height: 1.5; }
        .cta-group { display: flex; gap: 16px; flex-wrap: wrap; }
        .btn-primary {
            background: linear-gradient(145deg, #3da2d0, #1f7aac);
            padding: 14px 34px; border-radius: 50px; color: white; font-weight: 700;
            border: none; cursor: pointer; transition: all 0.2s ease; font-size: 1rem;
            text-decoration: none; display: inline-block;
            box-shadow: 0 8px 18px -6px rgba(30, 130, 190, 0.3);
        }
        .btn-primary:hover { transform: translateY(-3px); filter: brightness(1.02); box-shadow: 0 16px 24px -8px rgba(30, 130, 190, 0.4); }
        .btn-outline {
            background: transparent; border: 1.5px solid #2b8cbe;
            padding: 12px 32px; border-radius: 50px; font-weight: 600;
            color: #006994; transition: 0.2s; text-decoration: none;
        }
        .btn-outline:hover { background: rgba(0, 119, 182, 0.08); border-color: #0077b6; transform: translateY(-2px); }
        .hero-visual { flex: 1; display: flex; justify-content: center; position: relative; }
        .hero-card {
            background: rgba(255,255,255,0.6); backdrop-filter: blur(12px);
            border-radius: 48px; padding: 20px;
            box-shadow: 0 30px 45px -20px rgba(0, 60, 100, 0.15);
            border: 1px solid rgba(255,255,255,0.8);
            width: 100%; max-width: 420px;
        }
        .floating-icon {
            position: absolute; font-size: 2.5rem; bottom: -20px; right: -15px;
            background: white; padding: 12px; border-radius: 50%;
            box-shadow: 0 12px 25px rgba(0, 80, 130, 0.1); color: #2b8cbe;
        }
        .section-title {
            text-align: center; font-size: 2.5rem; font-weight: 800; margin-bottom: 16px;
            letter-spacing: -0.02em;
            background: linear-gradient(145deg, #02457a, #2b8cbe);
            background-clip: text; -webkit-background-clip: text; color: transparent;
        }
        .section-sub { text-align: center; color: #1f6f92; max-width: 680px; margin: 0 auto 64px auto; font-size: 1.1rem; }

        /* ===== 业务卡片 (主页) ===== */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
        }
        .service-card {
            background: white; border-radius: 32px; padding: 32px 28px;
            box-shadow: var(--card-shadow); transition: var(--transition-default);
            border: 1px solid #cde5f5;
            cursor: pointer;
            text-decoration: none;
            color: inherit;
            display: block;
        }
        .service-card:hover { transform: translateY(-8px); border-color: #8ac9f0; box-shadow: 0 30px 40px -20px rgba(42, 150, 210, 0.2); }
        .service-icon {
            font-size: 3rem; background: linear-gradient(130deg, #a3d8f4, #b0dff5);
            width: 70px; height: 70px; display: flex; align-items: center; justify-content: center;
            border-radius: 24px; margin-bottom: 24px; color: #006994;
        }
        .service-card h3 { font-size: 1.7rem; font-weight: 700; margin-bottom: 12px; color: #02457a; }
        .service-card p { color: #1f6f92; line-height: 1.5; }

        /* ===== 业务详情页 (二级页面) ===== */
        .service-detail-page {
            padding: 120px 0 80px;
            background: #E6F4FF;
            min-height: 100vh;
        }
        .back-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: white;
            padding: 10px 24px;
            border-radius: 40px;
            border: 1px solid #cde5f5;
            color: #03506f;
            font-weight: 600;
            cursor: pointer;
            transition: 0.2s;
            text-decoration: none;
            margin-bottom: 32px;
        }
        .back-btn:hover {
            background: #b0dff5;
            border-color: #48b5e4;
        }
        .detail-hero {
            background: linear-gradient(145deg, #9ac9e6, #b5ddf5);
            border-radius: 48px;
            padding: 48px 56px;
            margin-bottom: 48px;
            display: flex;
            align-items: center;
            gap: 40px;
            flex-wrap: wrap;
        }
        .detail-hero .icon-large {
            font-size: 4.5rem;
            color: #02457a;
            background: rgba(255,255,255,0.4);
            width: 100px;
            height: 100px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 32px;
        }
        .detail-hero .hero-text { flex: 1; }
        .detail-hero .hero-text h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #02457a;
            margin-bottom: 8px;
        }
        .detail-hero .hero-text p {
            color: #03506f;
            font-size: 1.1rem;
            line-height: 1.6;
        }
        .detail-body {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
        }
        .detail-body .main-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #02457a;
            margin-bottom: 16px;
        }
        .detail-body .main-text p {
            color: #1f6f92;
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .detail-body .main-text ul {
            list-style: none;
            padding: 0;
        }
        .detail-body .main-text ul li {
            padding: 10px 0;
            border-bottom: 1px solid rgba(0, 80, 130, 0.08);
            display: flex;
            align-items: center;
            gap: 12px;
            color: #03506f;
        }
        .detail-body .main-text ul li i {
            color: #006994;
            width: 24px;
        }
        .detail-sidebar {
            background: white;
            border-radius: 32px;
            padding: 32px;
            border: 1px solid #cde5f5;
            box-shadow: var(--card-shadow);
        }
        .detail-sidebar h4 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #02457a;
            margin-bottom: 16px;
        }
        .detail-sidebar .info-item {
            padding: 12px 0;
            border-bottom: 1px solid #eef4f9;
            display: flex;
            justify-content: space-between;
            font-size: 0.95rem;
        }
        .detail-sidebar .info-item:last-child { border-bottom: none; }
        .detail-sidebar .info-item .label { color: #6f8ba5; }
        .detail-sidebar .info-item .value { color: #03396c; font-weight: 600; }

        /* 数据 */
        .showcase { background: var(--light-bg); }
        .stats-wrap {
            display: flex; justify-content: space-between; flex-wrap: wrap;
            gap: 32px; margin-top: 48px;
        }
        .stat-item { text-align: center; flex: 1; min-width: 140px; }
        .stat-number {
            font-size: 3rem; font-weight: 800;
            background: linear-gradient(145deg, #02457a, #3a8fcb);
            background-clip: text; -webkit-background-clip: text; color: transparent;
        }
        .stat-label { font-weight: 500; color: #1f6f92; }

        /* ===== 作品集板块 (主页) ===== */
        #projects { scroll-margin-top: 80px; }
        .project-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
        }
        .project-item {
            background: white; border-radius: 28px; overflow: hidden;
            box-shadow: var(--card-shadow); transition: 0.25s;
            border: 1px solid #cde5f5;
            cursor: pointer;
            text-decoration: none;
            color: inherit;
            display: block;
        }
        .project-item:hover {
            transform: translateY(-6px);
            box-shadow: 0 30px 45px -18px rgba(0, 80, 130, 0.18);
            border-color: #8ac9f0;
        }
        .project-img {
            height: 200px;
            background: linear-gradient(145deg, #9ac9e6, #b5ddf5);
            display: flex; align-items: center; justify-content: center;
            color: #02457a; font-size: 3rem;
        }
        .project-info { padding: 20px; }
        .project-info h4 { font-size: 1.3rem; font-weight: 700; color: #02457a; }
        .project-info p { color: #1f6f92; font-size: 0.95rem; margin-top: 4px; }

        /* ===== 作品集详情页 ===== */
        .case-detail-page {
            padding: 120px 0 80px;
            background: #E6F4FF;
            min-height: 100vh;
        }
        .detail-header { margin-bottom: 40px; }
        .detail-header h2 {
            font-size: 2.4rem;
            font-weight: 800;
            background: linear-gradient(145deg, #02457a, #3a8fcb);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }
        .detail-header p { color: #1f6f92; font-size: 1.1rem; margin-top: 4px; }
        .detail-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 32px;
        }
        .detail-card {
            background: white;
            border-radius: 32px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            border: 1px solid #cde5f5;
            transition: 0.25s;
        }
        .detail-card:hover { transform: translateY(-4px); box-shadow: 0 30px 45px -18px rgba(0, 80, 130, 0.15); }
        .detail-video-wrapper {
            position: relative;
            width: 100%;
            padding-top: 56.25%;
            background: #b0d5eb;
            cursor: pointer;
            overflow: hidden;
            border-bottom: 2px solid #cde5f5;
        }
        .detail-video-wrapper .video-placeholder {
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(145deg, #9ac9e6, #b5ddf5);
            color: #03396c;
            font-size: 3.2rem;
            transition: 0.2s;
        }
        .detail-video-wrapper .video-placeholder i {
            background: rgba(255,255,255,0.7);
            padding: 16px 20px;
            border-radius: 60px;
            backdrop-filter: blur(6px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.05);
        }
        .detail-video-wrapper:hover .video-placeholder { filter: brightness(0.96); }
        .detail-video-wrapper video {
            position: absolute;
            top: 0; left: 0;
            width: 100%; height: 100%;
            object-fit: cover;
            background: #000;
            display: none;
        }
        .detail-video-wrapper.playing .video-placeholder { display: none; }
        .detail-video-wrapper.playing video { display: block; }
        .detail-info { padding: 20px 22px 24px; }
        .detail-info h4 { font-size: 1.2rem; font-weight: 700; color: #02457a; margin-bottom: 4px; }
        .detail-info .tag {
            display: inline-block;
            background: #e6f4ff;
            padding: 2px 14px;
            border-radius: 30px;
            font-size: 0.7rem;
            font-weight: 600;
            color: #006994;
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .detail-info p { color: #1f6f92; font-size: 0.95rem; line-height: 1.5; }

        /* 视频弹窗 */
        .video-modal {
            display: none;
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(0, 20, 40, 0.7);
            backdrop-filter: blur(12px);
            z-index: 999;
            justify-content: center;
            align-items: center;
            padding: 30px;
        }
        .video-modal.active { display: flex; }
        .modal-content {
            background: #0b1f2e;
            border-radius: 40px;
            max-width: 820px;
            width: 100%;
            position: relative;
            box-shadow: 0 40px 70px rgba(0,0,0,0.5);
            overflow: hidden;
        }
        .modal-content video {
            width: 100%;
            display: block;
            border-radius: 40px;
            background: #000;
            max-height: 80vh;
        }
        .modal-close {
            position: absolute;
            top: 16px; right: 20px;
            background: rgba(255,255,255,0.2);
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            width: 48px; height: 48px;
            border-radius: 50%;
            backdrop-filter: blur(8px);
            transition: 0.2s;
        }
        .modal-close:hover { background: rgba(255,80,80,0.4); }
        .modal-caption {
            padding: 16px 24px 24px;
            color: #d4edff;
            background: #0b1f2e;
            border-radius: 0 0 40px 40px;
        }
        .modal-caption h3 { font-weight: 700; font-size: 1.5rem; margin-bottom: 4px; }
        .modal-caption p { opacity: 0.8; }

        /* 联系 */
        .contact {
            background: linear-gradient(145deg, #b3ddf5, #8ac9f0);
            color: #03396c;
            border-radius: 0;
        }
        .contact .section-title, .contact .section-sub { color: #03396c; background: none; -webkit-background-clip: unset; }
        .contact-flex { display: flex; flex-wrap: wrap; gap: 48px; justify-content: space-between; align-items: center; }
        .contact-info { flex: 1; }
        .contact-detail p { margin: 20px 0; display: flex; align-items: center; gap: 16px; font-size: 1.1rem; color: #03396c; }
        .contact-detail i { width: 32px; font-size: 1.7rem; color: #006994; }

        .footer {
            background: #b0d5eb;
            color: #03396c;
            padding: 48px 0;
            text-align: center;
            font-size: 0.9rem;
            border-top: 1px solid #8ac9f0;
        }
        .footer a { color: #03506f; text-decoration: none; }

        .main-content.hidden { display: none; }
        .sub-text-highlight {
            color: #02457a;
            font-weight: 600;
        }

        @media (max-width: 900px) {
            .nav-links { display: none; }
            .mobile-menu { display: block; }
            .hero-content h1 { font-size: 2.5rem; }
            .container { padding: 0 24px; }
            section { padding: 70px 0; }
            .hero { padding-top: 130px; }
            .service-detail-page { padding: 100px 0 60px; }
            .case-detail-page { padding: 100px 0 60px; }
            .detail-hero { padding: 32px 24px; flex-direction: column; text-align: center; }
            .detail-body { grid-template-columns: 1fr; }
        }
        @media (max-width: 720px) {
            .hero .container { flex-direction: column; }
            .section-title { font-size: 2rem; }
            .detail-grid { grid-template-columns: 1fr; }
        }
        .mobile-nav-active {
            display: flex !important;
            flex-direction: column;
            background: rgba(235, 248, 255, 0.98);
            backdrop-filter: blur(20px);
            position: absolute;
            top: 70px; left: 0; width: 100%;
            padding: 32px; gap: 24px;
            box-shadow: 0 20px 35px rgba(0, 80, 130, 0.08);
            border-radius: 0 0 24px 24px;
            z-index: 999;
        }
        .mobile-nav-active a { font-size: 1.2rem; }
        .logo-image{
          width: 60px;
          height: 60px;
        }
        .fhc{
          display: flex;
          align-items: center;
        }
        .wh100{
          width: 100%;
          height: 100%;
        }