* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #ee1c24;
    --primary-dark: #c80f16;
    --secondary-color: #353a3e;
    --accent-color: #e42125;
    --text-color: #404040;
    --text-light: #999;
    --bg-color: #ffffff;
    --bg-light: #f5f5f5;
    --border-color: #e6e6e6;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-light);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity 0.3s;
}

.logo a:hover {
    opacity: 0.8;
}

.logo-img {
    height: 50px;
    width: auto;
    max-width: 200px;
}

.logo-text {
    font-size: 24px;
    font-weight: bold;
    color: var(--secondary-color);
}

.header-contact .phone {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s;
}

.header-contact .phone:hover {
    color: var(--primary-color);
}

/* Main Content */
.main {
    min-height: calc(100vh - 200px);
    padding: 40px 0;
}

.page-header {
    text-align: center;
    margin-bottom: 50px;
}

.page-header h1 {
    font-size: 42px;
    color: var(--secondary-color);
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 18px;
    color: var(--text-light);
}

/* Category Sections */
.category-section {
    margin-bottom: 60px;
}

.category-section:last-child {
    margin-bottom: 0;
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

.category-title {
    font-size: 32px;
    color: var(--secondary-color);
    margin: 0;
    font-weight: 700;
}

.btn-buy {
    display: inline-block;
    padding: 10px 24px;
    background-color: var(--secondary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s;
    font-size: 15px;
    white-space: nowrap;
}

.btn-buy:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(53, 58, 62, 0.3);
}

/* Point Clouds Grid */
.point-clouds-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 0;
}

.point-cloud-card {
    background: var(--bg-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}

.point-cloud-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.card-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 50%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.card-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.image-placeholder {
    color: rgba(255, 255, 255, 0.9);
}

.card-content {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card-content h3 {
    font-size: 20px;
    color: var(--secondary-color);
    margin-bottom: 10px;
    font-weight: 600;
}

.equipment {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 12px;
}

.description {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 20px;
    flex-grow: 1;
    line-height: 1.5;
}

.btn-view {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s;
    font-size: 15px;
}

.btn-view:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(238, 28, 36, 0.3);
}

/* Footer */
.footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 40px 0 20px;
    margin-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 15px;
    font-weight: 600;
}

.footer-section p {
    margin-bottom: 8px;
    font-size: 14px;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 20px;
    text-align: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

/* Responsive */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 32px;
    }

    .category-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .category-title {
        font-size: 26px;
    }

    .btn-buy {
        align-self: flex-start;
    }

    .point-clouds-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .header-top {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .page-header h1 {
        font-size: 28px;
    }

    .category-title {
        font-size: 22px;
    }

    .btn-buy {
        padding: 8px 20px;
        font-size: 14px;
    }

    .subtitle {
        font-size: 16px;
    }
}