/* CSS Reset & Variables */
        :root {
            --primary-blue: #5e7691; /* Deep Cyan / Tech Blue */
            --accent-red: #d32f2f;   /* Suntone Red */
            --accent-cyan: #00bcd4;  /* Cyber Cyan */
            --bg-white: #ffffff;
            --bg-gray: #f4f6f9;     /* Light Slate */
            --text-dark: #333333;
            --text-light: #ffffff;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            margin: 0;
            padding: 0;
            color: var(--text-dark);
            line-height: 1.6;
            background-color: var(--bg-gray);
        }

        /* Header & Navigation */
        header {
            background-color: var(--primary-blue);
            color: var(--text-light);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .nav-container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: bold;
        }
        
        .logo span {
            color: var(--accent-red);
        }

        nav ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
        }

        nav li {
            margin-left: 20px;
        }

        nav a {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }

        nav a:hover {
            color: var(--accent-cyan);
        }

        /* Hero Section với Hình ảnh nền */
        .hero {
            /* Lớp phủ gradient tối màu kết hợp với hình nền banner_image.jpg */
            background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('/img/banner.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: var(--text-light);
            text-align: center;
            padding: 6rem 2rem;
        }

        .hero h1 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem auto;
            color: #e0e0e0;
        }

        .btn {
            display: inline-block;
            padding: 10px 25px;
            background-color: var(--accent-red);
            color: var(--text-light);
            text-decoration: none;
            border-radius: 5px;
            font-weight: bold;
            transition: background-color 0.3s;
        }

        .btn:hover {
            background-color: #b71c1c;
        }
        
        .btn-outline {
             background-color: transparent;
             border: 2px solid var(--accent-cyan);
             color: var(--accent-cyan);
             margin-left: 10px;
        }
        
        .btn-outline:hover {
             background-color: var(--accent-cyan);
             color: #1a237e;
        }

        /* Key Metrics Section */
        .metrics {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            padding: 2rem;
            background-color: var(--bg-white);
        }

        .metric-item {
            text-align: center;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            flex: 1;
            min-width: 200px;
        }

        .metric-item h3 {
            color: var(--accent-cyan);
            font-size: 2rem;
            margin: 0 0 10px 0;
        }

        /* Sections General */
        section {
            padding: 4rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .section-title {
            color: var(--primary-blue);
            text-align: center;
            font-size: 2rem;
            margin-bottom: 2rem;
            position: relative;
        }
        
        .section-title::after {
            content: '';
            display: block;
            width: 50px;
            height: 3px;
            background-color: var(--accent-red);
            margin: 10px auto 0;
        }

        /* Leasing Section (Focus) */
        .leasing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .card {
            background: var(--bg-white);
            border-top: 4px solid var(--primary-blue);
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            transition: transform 0.3s;
        }

        .card:hover {
            transform: translateY(-5px);
        }
        
        .card img {
            width: 100%;
            height: auto;
            border-radius: 4px;
            margin-bottom: 15px;
            cursor: pointer;
            transition: transform 0.3s;
        }

        .card img:hover {
            transform: scale(1.02);
        }

        .card h3 {
            color: var(--primary-blue);
            margin-top: 0;
        }

        /* Lightbox Modal CSS cho tính năng Phóng to ảnh */
        .modal {
            display: none;
            position: fixed;
            z-index: 2000;
            padding-top: 50px;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            overflow: auto;
            background-color: rgba(0, 0, 0, 0.9);
        }

        .modal-content {
            margin: auto;
            display: block;
            max-width: 85%;
            max-height: 85vh;
            border-radius: 4px;
            box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
        }

        .close-modal {
            position: absolute;
            top: 20px;
            right: 40px;
            color: #f1f1f1;
            font-size: 40px;
            font-weight: bold;
            cursor: pointer;
            transition: 0.3s;
        }

        .close-modal:hover {
            color: var(--accent-red);
        }

        /* Contact Section */
        .contact-container {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            background: var(--bg-white);
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
        }

        .contact-info, .contact-form {
            flex: 1;
            min-width: 300px;
        }

        .contact-form input, 
        .contact-form select,
        .contact-form textarea {
            width: 100%;
            padding: 10px;
            margin-bottom: 15px;
            border: 1px solid #ccc;
            border-radius: 4px;
            box-sizing: border-box;
        }

        .contact-form button {
            width: 100%;
            border: none;
            cursor: pointer;
        }

        /* Khung chứa Google Maps */
        .map-container { width: 100%; height: 300px; margin-top: 20px; border-radius: 8px; overflow: hidden; box-shadow: 0 4px 6px rgba(0,0,0,0.1); border: 2px solid #eee; }
        .map-container iframe { width: 100%; height: 100%; border: none; }

        /* Footer */
        footer {
            background-color: var(--text-dark);
            color: var(--text-light);
            text-align: center;
            padding: 2rem;
            margin-top: 2rem;
        }