/* Tailwind-inspired Main Styles */
* {
    box-sizing: border-box;
}

body {
    background-color: var(--color-background);
    color: var(--color-text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    margin: 0;
    padding: 0;
}

main {
    flex: 1 0 auto;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 0 1rem;
}

/* Hero Section - Tailwind Style */
.hero {
    padding: 1.28rem 0 0.96rem !important; /* 再减少20%的padding，使用!important确保生效 */
    background: linear-gradient(135deg, var(--color-background) 0%, var(--color-card-bg) 100%);
    border-radius: 0.75rem;
    margin-bottom: 0.5rem !important; /* 进一步减少间距，使用!important确保生效 */
}

.hero h1 {
    font-size: 2.5rem !important; /* 大幅减少字体大小 */
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 0.6rem !important; /* 再减少20%标题下边距，使用!important确保生效 */
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .lead {
    font-size: 1rem !important; /* 减少描述字体大小 */
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-bottom: 0.96rem !important; /* 再减少20%描述下边距，使用!important确保生效 */
    max-width: 42rem;
}

.hero img {
    border-radius: 0.75rem;
    box-shadow: 0 25px 50px -12px var(--color-shadow-black);
    transition: transform 0.3s ease;
}

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

/* Cards - Tailwind Style */
.card {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    transition: all 0.2s ease-in-out;
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: 0 1px 3px 0 var(--color-shadow-black-light), 0 1px 2px 0 var(--color-shadow-black-dark);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -3px var(--color-shadow-black-light), 0 4px 6px -2px var(--color-shadow-black-lighter);
    border-color: var(--color-primary);
}

.card-img-container {
    height: 350px;
    overflow: hidden;
}

.card-img-container img {
    width: 350px;
    height: 350px;
    object-fit: cover;
}

.category-card img {
    height: 250px;
    object-fit: cover;
    border-radius: 12px 12px 0 0;
}

/* Product Cards - MOVED TO products.css */
/*
.product-card {
    background: linear-gradient(145deg, var(--color-card-bg), var(--color-card-bg-variant));
    border: 1px solid var(--color-primary-alpha-1);
    box-shadow: 0 4px 15px var(--color-shadow-black-medium);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--color-primary-alpha-2);
    border-color: var(--color-primary-alpha-3);
}

.product-card .card-title a {
    color: var(--color-text);
    transition: color 0.3s ease;
}

.product-card .card-title a:hover {
    color: var(--color-text);
}

.product-card .badge {
    background-color: var(--color-primary-alpha-2);
    color: var(--color-primary);
    border: 1px solid var(--color-primary-alpha-3);
}

.product-card .card-text {
    color: var(--color-text-secondary);
}

.product-card .card-footer {
    background: transparent !important;
    border-top: 1px solid var(--color-primary-alpha-1);
}

.product-card .btn-primary {
    background: linear-gradient(145deg, var(--color-primary), var(--color-primary-hover));
    border: none;
    box-shadow: 0 2px 8px var(--color-primary-alpha-2);
}

.product-card .btn-primary:hover {
    background: linear-gradient(145deg, var(--color-primary-hover), var(--color-primary));
    box-shadow: 0 4px 12px var(--color-primary-alpha-3);
}

.product-card .card-img-container,
.gifts-card .card-img-container {
    height: 350px;
    overflow: hidden;
}

.product-card .card-img-container img,
.gifts-card .card-img-container img {
    width: 350px;
    height: 350px;
    object-fit: cover;
}
*/

/* Client Cards */
.client-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.client-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 15px var(--color-primary-alpha-3);
}

.client-card img {
    height: 150px;
    object-fit: contain;
    padding: 20px;
    background-color: var(--color-card-bg);
}

.client-card .card-title {
    color: var(--color-primary);
    font-weight: 600;
}

.client-card .card-text {
    color: var(--color-text-secondary);
}

.client-card .card-footer {
    background-color: var(--color-background) !important;
    border-top: 1px solid var(--color-border);
}

.client-card .btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text);
}

.client-card .btn-primary:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

/* Footer */
footer {
    background-color: var(--color-background) !important;
    border-top: 1px solid var(--color-border);
    margin-top: auto;
    padding: 2rem 0;
}

footer h5 {
    color: var(--color-primary);
    font-weight: 600;
}

footer a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

footer p {
    color: var(--color-text-secondary);
}

/* Buttons - Tailwind Style */
.btn {
    font-weight: 500;
    border-radius: 0.5rem;
    transition: all 0.15s ease-in-out;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-text);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    box-shadow: 0 1px 2px 0 var(--color-shadow-black-lighter);
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px var(--color-shadow-black-light), 0 2px 4px -1px var(--color-shadow-black-dark);
}

.btn-outline-primary {
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    background-color: transparent;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    margin: 0.5rem;
}

.btn-outline-primary:hover {
    background-color: var(--color-primary);
    color: var(--color-text);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px var(--color-shadow-black-light), 0 2px 4px -1px var(--color-shadow-black-dark);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Navbar - Tailwind Style */
.navbar {
    background-color: var(--color-background) !important;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 1px 3px 0 var(--color-shadow-black-light), 0 1px 2px 0 var(--color-shadow-black-dark);
    padding: 1rem 0;
}

.navbar-brand {
    color: var(--color-text) !important;
    font-weight: 700;
    font-size: 1.5rem;
    text-decoration: none;
}

.nav-link {
    color: var(--color-text-secondary) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: 0.375rem;
    transition: all 0.15s ease-in-out;
    text-decoration: none;
}

.nav-link:hover {
    color: var(--color-primary) !important;
    background-color: var(--color-primary-alpha-1);
}

.nav-link.active {
    color: var(--color-primary) !important;
    background-color: var(--color-primary-alpha-1);
}

/* Mining Equipment Specific Styles */
.specifications-table th {
    width: 40%;
}

/* Badge */
.badge {
    background-color: var(--color-primary);
    color: var(--color-text);
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
}

/* Project Cards */
.project-card img {
    height: 200px;
    object-fit: cover;
}


/* About Section */
.about-us {
    background-color: var(--color-background);
    padding: 2rem;
    border-radius: 12px;
}

.about-us h2 {
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.about-us p {
    color: var(--color-text);
    line-height: 1.8;
}



/* Description Text */
.description-text {
    white-space: pre-line;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: 1rem;
}



/* Form Styles */
.form-control {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.form-control:focus {
    background-color: var(--color-card-bg);
    border-color: var(--color-primary);
    color: var(--color-text);
}

.form-label {
    color: var(--color-text);
}

/* Modal Styles */
.modal-content {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
}

.modal-header {
    border-bottom: 1px solid var(--color-border);
}

.modal-footer {
    border-top: 1px solid var(--color-border);
}

.modal-title {
    color: var(--color-text);
}

/* Alert Styles */
.alert {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.alert-success {
    border-color: var(--color-success);
}

.alert-danger {
    border-color: var(--color-danger);
}

/* Table Styles */
.table {
    color: var(--color-text);
}

.table thead th {
    border-bottom: 2px solid var(--color-border);
    color: var(--color-text);
}

.table td {
    border-top: 1px solid var(--color-border);
}

/* Pagination Styles */
.pagination .page-link {
    background-color: var(--color-card-bg);
    border-color: var(--color-border);
    color: var(--color-text);
}

.pagination .page-link:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text);
}

.pagination .active .page-link {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

/* Tailwind-inspired Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.px-4 {
    padding-left: 1rem;
    padding-right: 1rem;
}

.py-16 {
    padding-top: 4rem;
    padding-bottom: 4rem;
}

.py-8 {
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.mb-12 {
    margin-bottom: 3rem;
}

.mb-6 {
    margin-bottom: 1.5rem;
}

.mb-4 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 0.75rem;
}

.space-y-6 > * + * {
    margin-top: 1.5rem;
}

.space-y-2 > * + * {
    margin-top: 0.5rem;
}

.grid {
    display: grid;
}

.grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.gap-8 {
    gap: 2rem;
}

.gap-12 {
    gap: 3rem;
}

.items-center {
    align-items: center;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-3xl {
    font-size: 1.875rem;
    line-height: 2.25rem;
}

.text-xl {
    font-size: 1.25rem;
    line-height: 1.75rem;
}

.text-lg {
    font-size: 1.125rem;
    line-height: 1.75rem;
}

.text-sm {
    font-size: 0.875rem;
    line-height: 1.25rem;
}

.font-bold {
    font-weight: 700;
}

.font-semibold {
    font-weight: 600;
}

.leading-tight {
    line-height: 1.25;
}

.leading-relaxed {
    line-height: 1.625;
}

.italic {
    font-style: italic;
}

.rounded-lg {
    border-radius: 0.5rem;
}

.shadow-lg {
    box-shadow: 0 10px 15px -3px var(--color-shadow-black-light), 0 4px 6px -2px var(--color-shadow-black-lighter);
}

.shadow-2xl {
    box-shadow: 0 25px 50px -12px var(--color-shadow-black);
}

.overflow-hidden {
    overflow: hidden;
}

.w-full {
    width: 100%;
}

.h-auto {
    height: auto;
}

.h-64 {
    height: 16rem;
}

.max-w-full {
    max-width: 100%;
}

.flex {
    display: flex;
}

.justify-center {
    justify-content: center;
}

.justify-end {
    justify-content: flex-end;
}

.group:hover .group-hover\:scale-105 {
    transform: scale(1.05);
}

.transition-transform {
    transition-property: transform;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 150ms;
}

.duration-300 {
    transition-duration: 300ms;
}

.bg-gray-900 {
    background-color: var(--color-gray-900);
}

.text-gray-300 {
    color: var(--color-gray-300);
}

.text-gray-400 {
    color: var(--color-gray-400);
}

.text-primary {
    color: var(--color-primary);
}

.border-gray-700 {
    border-color: var(--color-gray-700);
}

.my-8 {
    margin-top: 2rem;
    margin-bottom: 2rem;
}

.mt-auto {
    margin-top: auto;
}

.sticky {
    position: sticky;
}

.top-0 {
    top: 0;
}

.z-50 {
    z-index: 50;
}

.border-0 {
    border-width: 0;
}

.me-4 {
    margin-right: 1rem;
}

.form-select-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

/* Responsive Grid */
@media (min-width: 640px) {
    .sm\:grid-cols-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 768px) {
    .md\:grid-cols-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    
    .md\:grid-cols-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    
    .lg\:grid-cols-4 {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
    
    .lg\:text-6xl {
        font-size: 3.75rem;
        line-height: 1;
    }
    
    .lg\:justify-end {
        justify-content: flex-end;
    }
}

@media (min-width: 1280px) {
    .xl\:grid-cols-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    
    .xl\:grid-cols-4 {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

/* Additional Utility Classes */
.flex-col {
    flex-direction: column;
}

.flex-grow {
    flex-grow: 1;
}

.h-full {
    height: 100%;
}

.h-96 {
    height: 24rem;
}

.w-fit {
    width: fit-content;
}

.w-24 {
    width: 6rem;
}

.w-32 {
    width: 8rem;
}

.h-24 {
    height: 6rem;
}

.h-32 {
    height: 8rem;
}

.object-contain {
    object-fit: contain;
}

.rounded-full {
    border-radius: 9999px;
}

.border-t {
    border-top-width: 1px;
}

.border-b {
    border-bottom-width: 1px;
}

.last\:border-b-0:last-child {
    border-bottom-width: 0;
}

.px-6 {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

.py-4 {
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.py-2 {
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

.px-3 {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
}

.px-4 {
    padding-left: 1rem;
    padding-right: 1rem;
}

.mb-16 {
    margin-bottom: 4rem;
}

.pt-6 {
    padding-top: 1.5rem;
}

.pt-8 {
    padding-top: 2rem;
}

.pt-16 {
    padding-top: 4rem;
}

.p-8 {
    padding: 2rem;
}

.p-12 {
    padding: 3rem;
}

.mb-8 {
    margin-bottom: 2rem;
}

.mb-6 {
    margin-bottom: 1.5rem;
}

.mb-4 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 0.75rem;
}

.mr-2 {
    margin-right: 0.5rem;
}

.mr-3 {
    margin-right: 0.75rem;
}

.mt-1 {
    margin-top: 0.25rem;
}

.mt-auto {
    margin-top: auto;
}

.space-x-2 > * + * {
    margin-left: 0.5rem;
}

.space-x-3 > * + * {
    margin-left: 0.75rem;
}

.space-y-3 > * + * {
    margin-top: 0.75rem;
}

.space-y-4 > * + * {
    margin-top: 1rem;
}

.space-y-6 > * + * {
    margin-top: 1.5rem;
}

.space-y-8 > * + * {
    margin-top: 2rem;
}

.text-6xl {
    font-size: 3.75rem;
    line-height: 1;
}

.text-5xl {
    font-size: 3rem;
    line-height: 1;
}

.text-4xl {
    font-size: 2.25rem;
    line-height: 2.5rem;
}

.text-2xl {
    font-size: 1.5rem;
    line-height: 2rem;
}

.text-xl {
    font-size: 1.25rem;
    line-height: 1.75rem;
}

.text-lg {
    font-size: 1.125rem;
    line-height: 1.75rem;
}

.text-sm {
    font-size: 0.875rem;
    line-height: 1.25rem;
}

.max-w-2xl {
    max-width: 42rem;
}

.max-w-3xl {
    max-width: 48rem;
}

.max-w-md {
    max-width: 28rem;
}

.sticky {
    position: sticky;
}

.top-8 {
    top: 2rem;
}

.lg\:col-span-1 {
    grid-column: span 1 / span 1;
}

.lg\:col-span-2 {
    grid-column: span 2 / span 2;
}

.bg-gray-800 {
    background-color: var(--color-gray-800);
}

.bg-gray-700 {
    background-color: var(--color-gray-700);
}

.bg-gray-900 {
    background-color: var(--color-gray-900);
}

.text-gray-500 {
    color: var(--color-gray-500);
}

.hover\:text-primary-hover:hover {
    color: var(--color-primary-hover);
}

.transition-colors {
    transition-property: color, background-color, border-color, text-decoration-color, fill, stroke;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 150ms;
}

.inline-block {
    display: inline-block;
}

.text-decoration-none {
    text-decoration: none;
}

.hover\:text-primary:hover {
    color: var(--color-primary);
}

/* Responsive Styles - Merged from responsive.css */
/* Mobile First Approach */
@media (max-width: 640px) {
    main {
        padding: 0 0.75rem;
    }
    
    .hero {
        padding: 1.2rem 0 0.8rem; /* 再减少20%移动端padding */
        margin-bottom: 0.5rem; /* 进一步减少间距 */
    }
    
    .hero h1 {
        font-size: 1.8rem !important; /* 大幅减少移动端字体大小 */
        line-height: 1.2;
    }
    
    .hero .lead {
        font-size: 0.9rem !important; /* 减少移动端描述字体大小 */
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .nav-link {
        padding: 0.375rem 0.75rem !important;
    }
}

/* Small devices (640px and up) */
@media (min-width: 640px) {
    .hero h1 {
        font-size: 2.2rem !important; /* 减少小屏幕字体大小 */
    }
    
    .hero .lead {
        font-size: 1rem !important; /* 减少小屏幕描述字体大小 */
    }
}

/* Medium devices (768px and up) */
@media (min-width: 768px) {
    .hero {
        padding: 1.6rem 0 1.2rem; /* 再减少20%中等屏幕padding */
    }
    
    .hero h1 {
        font-size: 2.5rem !important; /* 减少中等屏幕字体大小 */
    }
    
    .card-img-container {
        height: 300px;
    }
    
    .category-card img {
        height: 200px;
    }
}

/* Large devices (1024px and up) */
@media (min-width: 1024px) {
    .hero {
        padding: 2rem 0 1.6rem; /* 再减少20%大屏幕padding */
    }
    
    .hero h1 {
        font-size: 2.8rem !important; /* 减少大屏幕字体大小 */
    }
    
    .card-img-container {
        height: 350px;
    }
}

/* Extra large devices (1280px and up) */
@media (min-width: 1280px) {
    main {
        max-width: 1280px;
    }
    
    .hero h1 {
        font-size: 3rem !important; /* 减少超大屏幕字体大小 */
    }
}

/* Product Category Filter Styles */
.category-filter {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--color-card-bg);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: 2rem;
    border: 2px solid transparent;
    font-weight: 500;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.category-filter:hover {
    background-color: var(--color-primary);
    color: var(--color-background);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.category-filter.active {
    background-color: var(--color-primary);
    color: var(--color-background);
    border-color: var(--color-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.category-filter.active:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

/* Category Filter Responsive */
@media (max-width: 768px) {
    .category-filter {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}