:root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --secondary: #0ea5e9;
            --accent: #10b981;
            --warning: #f59e0b;
            --danger: #ef4444;
            --dark: #1e293b;
            --light: #f8fafc;
            --gray: #94a3b8;
            --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
        }

        body {
            background-color: #f1f5f9;
            color: #334155;
            line-height: 1.6;
        }

        .container {
            width: 100%;
            max-width: 1500px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 首屏专属样式 */
        #hero {
            background: linear-gradient(120deg, #e0f2fe 0%, #dbeafe 100%);
            padding: 80px 0 40px;
            position: relative;
            overflow: hidden;
            min-height: 100vh;
            display: flex;
            align-items: center;
        }

        #hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: linear-gradient(to right, rgba(219, 234, 254, 0.5), rgba(219, 234, 254, 0.8)), 
                        url('https://www.tieyunfei.com/wp-content/uploads/2025/03/微信图片_20250228155553.png') no-repeat center right/cover;
            border-radius: 30px 0 0 30px;
        }

        .gt-hero-content {
            position: relative;
            z-index: 2;
            max-width: 600px;
        }

        .gt-hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--primary-dark);
            margin-bottom: 20px;
            animation: fadeInUp 0.8s ease-out;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.1);
        }

        .gt-hero-subtitle {
            font-size: 1.3rem;
            color: #475569;
            margin-bottom: 40px;
            animation: fadeInUp 0.8s ease-out 0.2s forwards;
            opacity: 0;
            font-weight: 500;
        }

        .gt-stats {
            display: flex;
            gap: 40px;
            margin-top: 30px;
            animation: fadeInUp 0.8s ease-out 0.4s forwards;
            opacity: 0;
        }

        .gt-stat-item {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .gt-stat-value {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .gt-stat-label {
            font-size: 1rem;
            color: #64748b;
            font-weight: 500;
        }

        /* 运费计算器专属样式 */
        .gt-calculator-container {
            margin-top: 50px;
            position: relative;
            z-index: 10;
            animation: fadeIn 1s ease-out 0.6s forwards;
            opacity: 0;
        }

        .gt-calculator {
            background: white;
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow);
            border: 1px solid #e2e8f0;
        }

        .gt-calculator-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .gt-calculator-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .gt-calculator-title i {
            color: var(--primary);
            background: #dbeafe;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .gt-refresh-btn {
            background: #eff6ff;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            color: var(--primary);
            font-size: 1.1rem;
            border: none;
        }

        .gt-refresh-btn:hover {
            background: #dbeafe;
            transform: rotate(30deg);
        }

        .gt-refresh-btn.spin {
            animation: spin 0.8s linear;
        }

        .gt-calculator-form {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 15px;
        }

        .gt-form-group {
            display: flex;
            flex-direction: column;
        }

        .gt-form-group label {
            font-size: 0.95rem;
            color: #64748b;
            margin-bottom: 8px;
            font-weight: 500;
        }

        .gt-form-control {
            padding: 13px 15px;
            border: 1px solid #cbd5e1;
            border-radius: 10px;
            font-size: 1rem;
            transition: var(--transition);
            background: white;
            height: 48px;
        }

        select.gt-form-control {
            appearance: none;
            background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364758b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
            background-repeat: no-repeat;
            background-position: right 15px center;
            background-size: 16px;
            padding-right: 45px;
        }

        .gt-form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
        }

        .input-group {
            display: flex;
        }

        .input-group input {
            border-radius: 10px 0 0 10px;
            border-right: none;
            flex: 1;
        }

        .input-group select {
            border-radius: 0 10px 10px 0;
            width: 90px;
        }

        .gt-results {
            display: flex;
            justify-content: space-between;
            margin-top: 25px;
            padding-top: 25px;
            border-top: 1px solid #e2e8f0;
            gap: 15px;
        }

        .gt-result-card {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 25px 15px;
            border-radius: 12px;
            background: #f8fafc;
            transition: var(--transition);
            min-height: 180px;
            justify-content: center;
            border: 1px solid #e2e8f0;
        }

        .gt-result-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow);
        }

        .gt-result-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 15px;
            font-size: 1.8rem;
        }

        .gt-result-icon.air {
            background: rgba(59, 130, 246, 0.1);
            color: #3b82f6;
        }

        .gt-result-icon.rail {
            background: rgba(249, 115, 22, 0.1);
            color: #f97316;
        }

        .gt-result-icon.sea {
            background: rgba(14, 165, 233, 0.1);
            color: #0ea5e9;
        }

        .gt-result-type {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark);
        }

        .gt-result-price {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 8px;
            min-height: 40px;
            display: flex;
            align-items: center;
            color: var(--primary-dark);
        }

        .gt-result-days {
            font-size: 0.95rem;
            color: #64748b;
            font-weight: 500;
        }

        .inquiry-text {
            color: var(--danger);
            font-weight: 700;
            font-size: 1.3rem;
        }

        .price-change {
            animation: pricePulse 0.6s ease;
        }

        .warning-note {
            margin-top: 15px;
            padding: 12px 15px;
            background: #fef3c7;
            border-radius: 8px;
            color: #92400e;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* 动画效果 */
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes spin {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        @keyframes pricePulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.1); color: var(--primary); }
            100% { transform: scale(1); }
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            #hero::before {
                width: 40%;
            }
            
            .gt-calculator-form {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            #hero {
                padding: 60px 0 30px;
            }
            
            #hero::before {
                display: none;
            }
            
            .gt-hero-content {
                max-width: 100%;
                text-align: center;
            }
            
            .gt-stats {
                justify-content: center;
            }
            
            .gt-stat-item {
                align-items: center;
            }
            
            .gt-hero-title {
                font-size: 2.8rem;
            }
            
            .gt-results {
                flex-direction: column;
                gap: 15px;
            }
        }

        @media (max-width: 576px) {
            .gt-calculator-form {
                grid-template-columns: 1fr;
            }
            
            .gt-hero-title {
                font-size: 2.4rem;
            }
            
            .gt-hero-subtitle {
                font-size: 1.1rem;
            }
            
            .gt-stat-value {
                font-size: 2rem;
            }
            
            .gt-calculator {
                padding: 20px;
            }
        }