:root {
            --deep-blue: #0B3D91;
            --steel-blue: #1E90FF;
            --gold: #FBBF24;
            --gold-light: #FCD34D;
            --white: #FFFFFF;
            --light-gray: #F8FAFC;
            --dark-gray: #333333;
            --text-gray: #666666;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Source Han Sans SC', sans-serif;
            color: var(--dark-gray);
            line-height: 1.7;
            overflow-x: hidden;
        }
        .serif-font {
            font-family: 'Noto Serif SC', serif;
        }
        .page-loader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--deep-blue);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 10000;
            transition: opacity 0.5s ease, visibility 0.5s ease;
        }
        .page-loader.loaded {
            opacity: 0;
            visibility: hidden;
        }
        .loader-content {
            text-align: center;
        }
        .loader-logo {
            width: 80px;
            height: 80px;
            border: 3px solid var(--gold);
            border-top-color: transparent;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto 20px;
        }
        .loader-text {
            color: var(--gold);
            font-size: 18px;
            letter-spacing: 8px;
        }
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        .top-bar {
            background: var(--deep-blue);
            padding: 8px 0;
            font-size: 13px;
        }
        .top-bar a {
            color: rgba(255,255,255,0.85);
            text-decoration: none;
            transition: color 0.3s;
        }
        .top-bar a:hover {
            color: var(--gold);
        }
        .top-bar i {
            color: var(--gold);
            margin-right: 5px;
        }
        .top-bar-left span {
            color: rgba(255,255,255,0.85);
            margin-right: 25px;
        }
        .top-bar-right a {
            margin-left: 20px;
        }
        .navbar-custom {
            background: rgba(11, 61, 145, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 12px 0;
            transition: all 0.3s ease;
            border-bottom: 1px solid rgba(251, 191, 36, 0.2);
        }
        .navbar-custom.scrolled {
            background: rgba(11, 61, 145, 0.98);
            padding: 8px 0;
            box-shadow: 0 4px 30px rgba(0,0,0,0.3);
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            text-decoration: none;
        }
        .brand-logo {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 12px;
            font-family: 'Noto Serif SC', serif;
            font-weight: 700;
            font-size: 20px;
            color: var(--deep-blue);
            overflow: hidden;
        }
        .brand-logo img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }
        .brand-text {
            display: flex;
            flex-direction: column;
        }
        .brand-name {
            font-family: 'Noto Serif SC', serif;
            font-size: 22px;
            font-weight: 700;
            color: var(--white);
            letter-spacing: 2px;
        }
        .brand-name span {
            color: var(--gold);
        }
        .brand-slogan {
            font-size: 11px;
            color: rgba(255,255,255,0.6);
            letter-spacing: 3px;
        }
        .nav-link-custom {
            color: rgba(255,255,255,0.9) !important;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 18px !important;
            position: relative;
            transition: color 0.3s;
        }
        .nav-link-custom::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--gold);
            transition: width 0.3s;
        }
        .nav-link-custom:hover::after,
        .nav-link-custom.active::after {
            width: 60%;
        }
        .nav-link-custom:hover,
        .nav-link-custom.active {
            color: var(--gold) !important;
        }
        .navbar-toggler-custom {
            border: 1px solid var(--gold);
            padding: 8px;
        }
        .navbar-toggler-custom:focus {
            box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.3);
        }
        .navbar-toggler-icon-custom {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28212, 168, 67, 1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        .hero-section {
            min-height: 100vh;
            background: linear-gradient(135deg, var(--deep-blue) 0%, var(--steel-blue) 50%, var(--deep-blue) 100%);
            position: relative;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('../images/施工现场/13.jpg') center/cover no-repeat;
            opacity: 0.18;
        }
        .hero-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, rgba(11,61,145,0.7) 0%, rgba(30,144,255,0.5) 50%, rgba(11,61,145,0.9) 100%);
        }
        .hero-decoration {
            position: absolute;
            width: 100%;
            height: 100%;
            pointer-events: none;
        }
        .hero-decoration::before {
            content: '';
            position: absolute;
            top: 15%;
            left: 0;
            width: 200px;
            height: 1px;
            background: linear-gradient(90deg, var(--gold), transparent);
        }
        .hero-decoration::after {
            content: '';
            position: absolute;
            bottom: 20%;
            right: 0;
            width: 300px;
            height: 1px;
            background: linear-gradient(270deg, var(--gold), transparent);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 120px 0 80px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(251, 191, 36, 0.15);
            border: 1px solid rgba(251, 191, 36, 0.3);
            color: var(--gold);
            padding: 8px 24px;
            border-radius: 30px;
            font-size: 13px;
            letter-spacing: 3px;
            margin-bottom: 30px;
            animation: fadeInDown 1s ease;
        }
        .hero-title {
            font-family: 'Noto Serif SC', serif;
            font-size: 72px;
            font-weight: 700;
            color: var(--white);
            letter-spacing: 8px;
            margin-bottom: 20px;
            text-shadow: 0 4px 30px rgba(0,0,0,0.3);
            animation: fadeInUp 1s ease 0.2s both;
        }
        .hero-title span {
            color: var(--gold);
        }
        .hero-subtitle {
            font-size: 20px;
            color: rgba(255,255,255,0.8);
            letter-spacing: 6px;
            margin-bottom: 40px;
            animation: fadeInUp 1s ease 0.4s both;
        }
        .hero-cta {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            animation: fadeInUp 1s ease 0.6s both;
        }
        .btn-primary-custom {
            background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
            color: var(--deep-blue);
            font-weight: 600;
            padding: 14px 40px;
            border-radius: 4px;
            border: none;
            font-size: 15px;
            letter-spacing: 2px;
            transition: all 0.3s;
            text-decoration: none;
            display: inline-block;
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(251, 191, 36, 0.4);
            color: var(--deep-blue);
        }
        .btn-outline-custom {
            background: transparent;
            color: var(--white);
            font-weight: 500;
            padding: 14px 40px;
            border-radius: 4px;
            border: 1px solid rgba(255,255,255,0.4);
            font-size: 15px;
            letter-spacing: 2px;
            transition: all 0.3s;
            text-decoration: none;
            display: inline-block;
        }
        .btn-outline-custom:hover {
            background: rgba(255,255,255,0.1);
            border-color: var(--gold);
            color: var(--gold);
        }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-top: 80px;
            padding-top: 60px;
            border-top: 1px solid rgba(251, 191, 36, 0.2);
            animation: fadeInUp 1s ease 0.8s both;
        }
        .stat-item {
            text-align: center;
        }
        .stat-number {
            font-family: 'Noto Serif SC', serif;
            font-size: 48px;
            font-weight: 700;
            color: var(--gold);
            line-height: 1;
            margin-bottom: 10px;
        }
        .stat-label {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            letter-spacing: 2px;
        }
        .scroll-indicator {
            position: absolute;
            bottom: 40px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            animation: bounce 2s infinite;
        }
        .scroll-indicator a {
            color: var(--gold);
            font-size: 24px;
            text-decoration: none;
        }
        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
            40% { transform: translateX(-50%) translateY(-15px); }
            60% { transform: translateX(-50%) translateY(-7px); }
        }
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(40px); }
            to { opacity: 1; transform: translateY(0); }
        }
        @keyframes fadeInDown {
            from { opacity: 0; transform: translateY(-30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .reveal {
            opacity: 0;
            transform: translateY(50px);
            transition: all 0.8s ease;
        }
        .reveal.active {
            opacity: 1;
            transform: translateY(0);
        }
        .reveal-left {
            opacity: 0;
            transform: translateX(-50px);
            transition: all 0.8s ease;
        }
        .reveal-left.active {
            opacity: 1;
            transform: translateX(0);
        }
        .reveal-right {
            opacity: 0;
            transform: translateX(50px);
            transition: all 0.8s ease;
        }
        .reveal-right.active {
            opacity: 1;
            transform: translateX(0);
        }
        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }
        .section-badge {
            display: inline-block;
            background: rgba(251, 191, 36, 0.1);
            color: var(--gold);
            padding: 6px 20px;
            border-radius: 20px;
            font-size: 13px;
            letter-spacing: 2px;
            margin-bottom: 15px;
        }
        .section-title {
            font-family: 'Noto Serif SC', serif;
            font-size: 42px;
            font-weight: 700;
            color: var(--deep-blue);
            margin-bottom: 15px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-gray);
            max-width: 600px;
            margin: 0 auto;
        }
        .gold-line {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--gold), var(--gold-light));
            margin: 20px auto;
        }
        .products-section {
            padding: 100px 0;
            background: var(--light-gray);
        }
        .product-card {
            background: var(--white);
            border-radius: 8px;
            overflow: hidden;
            margin-bottom: 30px;
            transition: all 0.4s ease;
            box-shadow: 0 5px 30px rgba(0,0,0,0.08);
            position: relative;
        }
        .product-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--gold), var(--gold-light));
            transform: scaleX(0);
            transition: transform 0.4s ease;
            z-index: 2;
        }
        .product-card:hover::before {
            transform: scaleX(1);
        }
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 50px rgba(11, 61, 145, 0.15);
        }
        .product-image {
            height: 220px;
            overflow: hidden;
            position: relative;
        }
        .product-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .product-card:hover .product-image img {
            transform: scale(1.1);
        }
        .product-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, transparent 50%, rgba(11, 61, 145, 0.8) 100%);
            opacity: 0;
            transition: opacity 0.3s;
        }
        .product-card:hover .product-overlay {
            opacity: 1;
        }
        .product-content {
            padding: 25px;
        }
        .product-title {
            font-family: 'Noto Serif SC', serif;
            font-size: 20px;
            font-weight: 600;
            color: var(--deep-blue);
            margin-bottom: 12px;
        }
        .product-desc {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.8;
        }
        .product-tag {
            display: inline-block;
            background: rgba(251, 191, 36, 0.1);
            color: var(--gold);
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 12px;
            margin-top: 12px;
        }
        .advantages-section {
            padding: 100px 0;
            background: linear-gradient(135deg, var(--deep-blue) 0%, var(--steel-blue) 100%);
            position: relative;
        }
        .advantages-section .section-title,
        .advantages-section .section-subtitle {
            color: var(--white);
        }
        .advantages-section .gold-line {
            background: linear-gradient(90deg, var(--gold), var(--gold-light));
        }
        .advantage-card {
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(251, 191, 36, 0.2);
            border-radius: 12px;
            padding: 40px 30px;
            text-align: center;
            margin-bottom: 30px;
            transition: all 0.4s ease;
        }
        .advantage-card:hover {
            background: rgba(255,255,255,0.1);
            border-color: var(--gold);
            transform: translateY(-8px);
        }
        .advantage-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            font-size: 32px;
            color: var(--deep-blue);
        }
        .advantage-number {
            font-family: 'Noto Serif SC', serif;
            font-size: 48px;
            font-weight: 700;
            color: var(--gold);
            line-height: 1;
            margin-bottom: 5px;
        }
        .advantage-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 15px;
        }
        .advantage-desc {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            line-height: 1.8;
        }
        .story-section {
            padding: 100px 0;
            background: var(--white);
        }
        .timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--gold), var(--steel-blue));
            transform: translateX(-50%);
        }
        .timeline-item {
            position: relative;
            padding: 30px 0;
            display: flex;
            align-items: center;
        }
        .timeline-item:nth-child(odd) {
            flex-direction: row-reverse;
        }
        .timeline-content {
            width: 45%;
            padding: 30px;
            background: var(--light-gray);
            border-radius: 12px;
            position: relative;
            transition: all 0.4s ease;
        }
        .timeline-content:hover {
            box-shadow: 0 10px 40px rgba(0,0,0,0.1);
        }
        .timeline-item:nth-child(odd) .timeline-content {
            margin-right: 55%;
        }
        .timeline-item:nth-child(even) .timeline-content {
            margin-left: 55%;
        }
        .timeline-dot {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            width: 20px;
            height: 20px;
            background: var(--gold);
            border-radius: 50%;
            border: 4px solid var(--white);
            box-shadow: 0 0 0 3px var(--gold);
            z-index: 1;
        }
        .timeline-year {
            font-family: 'Noto Serif SC', serif;
            font-size: 32px;
            font-weight: 700;
            color: var(--gold);
            margin-bottom: 10px;
        }
        .timeline-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--deep-blue);
            margin-bottom: 10px;
        }
        .timeline-desc {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.8;
        }
        .cases-section {
            padding: 100px 0;
            background: var(--light-gray);
        }
        .case-card {
            position: relative;
            overflow: hidden;
            border-radius: 12px;
            margin-bottom: 30px;
            height: 350px;
        }
        .case-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .case-card:hover img {
            transform: scale(1.1);
        }
        .case-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, transparent 30%, rgba(11, 61, 145, 0.95) 100%);
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            transition: background 0.4s ease;
        }
        .case-card:hover .case-overlay {
            background: linear-gradient(180deg, rgba(11, 61, 145, 0.7) 0%, rgba(11, 61, 145, 0.98) 100%);
        }
        .case-category {
            display: inline-block;
            background: var(--gold);
            color: var(--deep-blue);
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 15px;
            align-self: flex-start;
        }
        .case-title {
            font-family: 'Noto Serif SC', serif;
            font-size: 22px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 10px;
        }
        .case-desc {
            font-size: 14px;
            color: rgba(255,255,255,0.8);
            line-height: 1.7;
            opacity: 0;
            transform: translateY(20px);
            transition: all 0.4s ease;
        }
        .case-card:hover .case-desc {
            opacity: 1;
            transform: translateY(0);
        }
        .trust-section {
            padding: 80px 0;
            background: var(--white);
        }
        .trust-item {
            text-align: center;
            padding: 30px 20px;
            transition: all 0.3s ease;
        }
        .trust-item:hover {
            transform: translateY(-5px);
        }
        .trust-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--steel-blue) 0%, var(--deep-blue) 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 28px;
            color: var(--gold);
            transition: all 0.3s ease;
        }
        .trust-item:hover .trust-icon {
            background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
            color: var(--deep-blue);
        }
        .trust-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--deep-blue);
            margin-bottom: 8px;
        }
        .trust-desc {
            font-size: 13px;
            color: var(--text-gray);
        }
        .cert-strip {
            margin-top: 50px;
        }
        .cert-item {
            text-align: center;
            margin-bottom: 30px;
        }
        .cert-box {
            border: 2px solid rgba(251, 191, 36, 0.4);
            border-radius: 12px;
            padding: 12px;
            background: var(--light-gray);
            margin-bottom: 12px;
            transition: all 0.3s ease;
            height: 200px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }
        .cert-box:hover {
            border-color: var(--gold);
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(11, 61, 145, 0.15);
        }
        .cert-box img {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
        }
        .cert-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--deep-blue);
        }
        .process-section {
            padding: 100px 0;
            background: var(--light-gray);
            position: relative;
        }
        .process-section .gold-line {
            background: linear-gradient(90deg, var(--gold), var(--gold-light));
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 60px;
        }
        .process-step {
            background: var(--white);
            border-radius: 16px;
            padding: 40px 30px;
            text-align: center;
            position: relative;
            transition: all 0.4s ease;
            border: 1px solid rgba(11, 61, 145, 0.08);
        }
        .process-step:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 50px rgba(11, 61, 145, 0.12);
            border-color: var(--gold);
        }
        .process-num {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--deep-blue), var(--steel-blue));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 22px;
            font-weight: 700;
            color: var(--white);
            position: relative;
            z-index: 2;
        }
        .process-step:hover .process-num {
            background: linear-gradient(135deg, var(--gold), var(--gold-light));
            color: var(--deep-blue);
        }
        .process-icon {
            font-size: 36px;
            color: var(--deep-blue);
            margin-bottom: 16px;
            transition: color 0.3s ease;
        }
        .process-step:hover .process-icon {
            color: var(--gold);
        }
        .process-step h4 {
            font-size: 20px;
            font-weight: 700;
            color: var(--deep-blue);
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.7;
        }
        @media (min-width: 768px) {
            .process-step:nth-child(1)::after,
            .process-step:nth-child(2)::after,
            .process-step:nth-child(4)::after,
            .process-step:nth-child(5)::after {
                content: '';
                position: absolute;
                top: 68px;
                right: -18px;
                width: 0;
                height: 0;
                border-left: 10px solid var(--gold);
                border-top: 8px solid transparent;
                border-bottom: 8px solid transparent;
                opacity: 0.4;
            }
            .process-step:nth-child(3)::after,
            .process-step:nth-child(6)::after {
                display: none;
            }
        }
        .footer {
            background: var(--deep-blue);
            padding: 80px 0 0;
            border-top: 1px solid rgba(251, 191, 36, 0.2);
        }
        .footer-brand {
            margin-bottom: 25px;
        }
        .footer-brand .brand-name {
            font-size: 24px;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            line-height: 1.8;
        }
        .footer-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 12px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 30px;
            height: 2px;
            background: var(--gold);
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: rgba(255,255,255,0.6);
            text-decoration: none;
            font-size: 14px;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
        }
        .footer-links a::before {
            content: '';
            width: 6px;
            height: 6px;
            background: var(--gold);
            border-radius: 50%;
            margin-right: 10px;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .footer-links a:hover {
            color: var(--gold);
            padding-left: 5px;
        }
        .footer-links a:hover::before {
            opacity: 1;
        }
        .footer-contact p {
            color: rgba(255,255,255,0.6);
            font-size: 14px;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }
        .footer-contact i {
            color: var(--gold);
            margin-right: 12px;
            width: 16px;
        }
        .footer-social {
            margin-top: 25px;
        }
        .footer-social a {
            display: inline-flex;
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            color: var(--white);
            margin-right: 12px;
            transition: all 0.3s ease;
        }
        .footer-social a:hover {
            background: var(--gold);
            color: var(--deep-blue);
            transform: translateY(-3px);
        }
        .footer-bottom {
            margin-top: 60px;
            padding: 25px 0;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
        }
        .footer-bottom p {
            color: rgba(255,255,255,0.5);
            font-size: 13px;
            margin: 0;
        }
        .footer-bottom a {
            color: var(--gold);
            text-decoration: none;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--deep-blue);
            font-size: 20px;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 1000;
            box-shadow: 0 5px 20px rgba(251, 191, 36, 0.3);
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(251, 191, 36, 0.5);
        }
        @media (max-width: 991px) {
            .hero-title {
                font-size: 48px;
                letter-spacing: 4px;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stat-number {
                font-size: 36px;
            }
            .section-title {
                font-size: 32px;
            }
            .timeline::before {
                left: 20px;
            }
            .timeline-item,
            .timeline-item:nth-child(odd) {
                flex-direction: column;
                align-items: flex-start;
                padding-left: 50px;
            }
            .timeline-content,
            .timeline-item:nth-child(odd) .timeline-content,
            .timeline-item:nth-child(even) .timeline-content {
                width: 100%;
                margin: 0;
            }
            .timeline-dot {
                left: 20px;
                top: 30px;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-step::after {
                display: none !important;
            }
        }
        @media (max-width: 767px) {
            .top-bar {
                display: none;
            }
            .hero-title {
                font-size: 36px;
                letter-spacing: 2px;
            }
            .hero-subtitle {
                font-size: 16px;
                letter-spacing: 3px;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-number {
                font-size: 28px;
            }
            .stat-label {
                font-size: 12px;
            }
            .section-title {
                font-size: 28px;
            }
            .section-subtitle {
                font-size: 14px;
            }
            .advantage-number {
                font-size: 36px;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .product-image {
                height: 180px;
            }
            .case-card {
                height: 280px;
            }
            .cert-box {
                height: 150px;
            }
            .footer {
                padding: 60px 0 0;
            }
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 44px;
                height: 44px;
            }
        }