/* =====================================================
   YouXin EPS Machine - Main Stylesheet
   ===================================================== */

:root {
    --color-primary: #0056b3;
    --color-primary-dark: #004494;
    --color-secondary: #e6a00b;
    --color-secondary-dark: #c78a00;
    --color-dark: #1a1a2e;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-alt: #f5f7fa;
    --color-border: #e2e8f0;
    --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --transition: 0.25s ease;
    --container: 1200px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-base);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

a:hover {
    color: var(--color-primary-dark);
}

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 0.6em;
    line-height: 1.25;
    color: var(--color-dark);
    font-weight: 700;
}

h1 { font-size: 2.75rem; }
h2 { font-size: 2.125rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin: 0 0 1em;
}

ul, ol {
    margin: 0 0 1em;
    padding-left: 1.5em;
}

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Accessibility */
.screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link:focus {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10000;
    background: var(--color-primary);
    color: #fff;
    padding: 0.75rem 1rem;
    clip: auto;
    width: auto;
    height: auto;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    line-height: 1.2;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: #fff;
}

.btn-secondary {
    background: var(--color-secondary);
    color: #fff;
    border-color: var(--color-secondary);
}

.btn-secondary:hover {
    background: var(--color-secondary-dark);
    border-color: var(--color-secondary-dark);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
}

.btn-lg {
    padding: 1rem 2.25rem;
    font-size: 1.05rem;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: box-shadow var(--transition);
}

.site-header.scrolled {
    box-shadow: var(--shadow);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.site-branding .custom-logo-link img {
    max-height: 56px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    display: inline-flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-text em {
    font-size: 0.7rem;
    font-style: normal;
    background: var(--color-secondary);
    color: #fff;
    padding: 0.15rem 0.4rem;
    margin-top: 0.2rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.main-navigation ul {
    display: flex;
    gap: 2rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.main-navigation a {
    color: var(--color-dark);
    font-weight: 600;
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0;
}

.main-navigation a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-secondary);
    transition: width var(--transition);
}

.main-navigation a:hover::after,
.main-navigation .current-menu-item a::after {
    width: 100%;
}

.main-navigation .current-menu-item a,
.main-navigation a:hover {
    color: var(--color-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background: var(--color-dark);
    border-radius: 2px;
    transition: all var(--transition);
}

.mobile-menu {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: 1.5rem;
    flex-direction: column;
    gap: 1rem;
}

.mobile-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-menu a {
    color: var(--color-dark);
    font-weight: 600;
    font-size: 1.1rem;
}

.mobile-menu.open {
    display: flex;
}

/* Hero */
.hero {
    position: relative;
    min-height: 720px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-dark) 0%, #16213e 100%);
    color: #fff;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></svg>');
    opacity: 0.6;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 720px;
}

.hero-subtitle {
    display: inline-block;
    color: var(--color-secondary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.hero h1 {
    font-size: 3.25rem;
    color: #fff;
    margin-bottom: 1.25rem;
    line-height: 1.15;
}

.hero p {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.85);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-buttons .btn-outline {
    color: #fff;
    border-color: rgba(255,255,255,0.5);
}

.hero-buttons .btn-outline:hover {
    background: #fff;
    color: var(--color-dark);
    border-color: #fff;
}

.hero-image {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 45%;
    opacity: 0.25;
    background: linear-gradient(90deg, var(--color-dark) 0%, transparent 100%), var(--placeholder-img, none);
    background-size: cover;
    background-position: center;
}

/* Section base */
.section {
    padding: 5rem 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 3rem;
}

.section-header h2 {
    margin-bottom: 0.75rem;
}

.section-header p {
    color: var(--color-text-light);
    font-size: 1.1rem;
    margin-bottom: 0;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: -4rem;
    position: relative;
    z-index: 3;
}

.stat-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    border-top: 4px solid var(--color-secondary);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary);
    display: block;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
}

.card-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: transform var(--transition), box-shadow var(--transition);
    display: flex;
    flex-direction: column;
}

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

.card-image {
    aspect-ratio: 16 / 10;
    background: var(--color-bg-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
}

.card:hover .card-image img {
    transform: scale(1.05);
}

.card-placeholder {
    color: var(--color-text-light);
    font-size: 0.875rem;
    text-align: center;
    padding: 1rem;
}

.card-body {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.card-title a {
    color: var(--color-dark);
}

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

.card-text {
    color: var(--color-text-light);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    flex: 1;
}

.card-link {
    font-weight: 600;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.card-link::after {
    content: '→';
    transition: transform var(--transition);
}

.card-link:hover::after {
    transform: translateX(4px);
}

/* Application / feature list */
.app-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
}

.app-item {
    background: #fff;
    border-radius: var(--radius);
    padding: 1.5rem 1rem;
    text-align: center;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.app-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow);
}

.app-icon {
    width: 56px;
    height: 56px;
    background: var(--color-bg-alt);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: var(--color-primary);
    font-size: 1.25rem;
    font-weight: 700;
}

.app-item h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.app-item p {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin: 0;
}

/* About home section */
.about-home {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-home-image {
    position: relative;
}

.about-home-image .placeholder-img {
    width: 100%;
    aspect-ratio: 4 / 3;
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
}

/* Replaceable images dropped in from the page "Page Images" meta box. */
.replaceable-img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: var(--radius-lg);
    display: block;
}

.replaceable-img.wide {
    aspect-ratio: 16 / 9;
}

.contact-map {
    width: 100%;
    height: 320px;
    border: 0;
    border-radius: 12px;
    display: block;
}

.about-home-content ul {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0;
}

.about-home-content li {
    padding-left: 1.75rem;
    position: relative;
    margin-bottom: 0.75rem;
}

.about-home-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: 700;
}

/* CTA */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    text-align: center;
}

.cta-section h2 {
    color: #fff;
    margin-bottom: 1rem;
}

.cta-section p {
    color: rgba(255,255,255,0.9);
    font-size: 1.1rem;
    margin-bottom: 1.75rem;
}

/* Page header */
.page-header {
    background: var(--color-bg-alt);
    padding: 4rem 0;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
    margin-bottom: 0.5rem;
}

.page-header p {
    color: var(--color-text-light);
    font-size: 1.1rem;
    margin: 0;
}

/* Breadcrumbs */
.breadcrumbs {
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 0;
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.breadcrumbs .container {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.breadcrumbs a {
    color: var(--color-text-light);
}

.breadcrumbs a:hover {
    color: var(--color-primary);
}

.breadcrumbs .sep {
    color: var(--color-border);
}

/* Content */
.entry-content {
    max-width: 800px;
    margin: 0 auto;
}

.entry-content h2,
.entry-content h3,
.entry-content h4 {
    margin-top: 2rem;
}

.entry-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

.entry-content th,
.entry-content td {
    border: 1px solid var(--color-border);
    padding: 0.75rem 1rem;
    text-align: left;
}

.entry-content th {
    background: var(--color-bg-alt);
    font-weight: 600;
}

/* Product archive */
.product-archive-toolbar {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.product-cat-filter {
    display: inline-flex;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    background: #fff;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-weight: 500;
    transition: all var(--transition);
}

.product-cat-filter:hover,
.product-cat-filter.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* Product single */
.product-single {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.product-gallery {
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    aspect-ratio: 4 / 3;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-gallery img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-meta h1 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.product-meta .product-excerpt {
    color: var(--color-text-light);
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
}

.product-specs {
    background: var(--color-bg-alt);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.product-specs h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.product-specs ul {
    list-style: none;
    padding: 0;
    margin: 0;
    columns: 2;
    gap: 1.5rem;
}

.product-specs li {
    break-inside: avoid;
    margin-bottom: 0.5rem;
    padding-left: 1.25rem;
    position: relative;
}

.product-specs li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: 700;
}

.product-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.product-tabs {
    margin-top: 3rem;
}

.tabs-nav {
    display: flex;
    gap: 0.5rem;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 1.5rem;
}

.tab-btn {
    padding: 0.75rem 1.25rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    font-weight: 600;
    color: var(--color-text-light);
    cursor: pointer;
}

.tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* Product photo grid (gallery under Description) */
.product-photo-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
    margin-top: 2rem;
}

.product-photo-item {
    display: block;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    overflow: hidden;
    background: #f5f5f5;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.product-photo-item img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    display: block;
}

.product-photo-item:hover,
.product-photo-item:focus-visible {
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
}

@media (max-width: 1024px) {
    .product-photo-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 600px) {
    .product-photo-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }
}

/* FAQ */
.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 1.25rem 1.5rem;
    background: transparent;
    border: none;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--color-primary);
    transition: transform var(--transition);
}

.faq-item.open .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
}

.faq-answer-inner {
    padding: 0 1.5rem 1.25rem;
    color: var(--color-text-light);
}

.faq-item.open .faq-answer {
    max-height: 500px;
}

/* News / Blog */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
}

.news-card .card-meta {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-form label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    margin-bottom: 1rem;
    transition: border-color var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.contact-info-card {
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.contact-info-card h3 {
    margin-bottom: 1rem;
}

.contact-info-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.contact-info-card li {
    margin-bottom: 0.75rem;
    color: var(--color-text-light);
}

.contact-info-card strong {
    color: var(--color-dark);
}

.form-message {
    padding: 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.form-message.success {
    background: #d4edda;
    color: #155724;
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
}

/* Footer */
.site-footer {
    background: var(--color-dark);
    color: rgba(255,255,255,0.75);
    padding-top: 4rem;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.25fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-col h4 {
    color: #fff;
    font-size: 1.1rem;
    margin-bottom: 1.25rem;
}

.site-logo-img {
    display: block;
    width: auto;
}

.footer-logo {
    display: inline-block;
    margin-bottom: 1rem;
    background: #fff;
    padding: 8px 12px;
    border-radius: 8px;
}

.footer-logo .site-logo-img {
    max-height: 40px;
}

.footer-brand p {
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
}

.footer-social a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    transition: background var(--transition);
}

.footer-social a:hover {
    background: var(--color-secondary);
    color: #fff;
}

.footer-links ul,
.footer-products ul,
.footer-contact ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li,
.footer-products li,
.footer-contact li {
    margin-bottom: 0.6rem;
}

.footer-links a,
.footer-products a {
    color: rgba(255,255,255,0.75);
}

.footer-links a:hover,
.footer-products a:hover {
    color: #fff;
}

.footer-bottom {
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.875rem;
    color: rgba(255,255,255,0.5);
}

.footer-bottom p {
    margin: 0;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.pagination a,
.pagination span {
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.pagination .current {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* Responsive */
@media (max-width: 1024px) {
    .card-grid,
    .card-grid-4,
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-top {
        grid-template-columns: repeat(2, 1fr);
    }

    .product-single,
    .about-home,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .main-navigation,
    .header-actions .btn-quote {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero p {
        font-size: 1.05rem;
    }

    .hero {
        min-height: auto;
        padding: 5rem 0;
    }

    .hero-image {
        width: 100%;
        opacity: 0.15;
    }

    .section {
        padding: 3.5rem 0;
    }

    .card-grid,
    .card-grid-4,
    .news-grid,
    .app-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .product-specs ul {
        columns: 1;
    }

    .tabs-nav {
        flex-wrap: wrap;
    }

h1 { font-size: 2rem; }
h2 { font-size: 1.625rem; }
h3 { font-size: 1.25rem; }
}

/* Application (long-tail landing) pages */
.application-single {
    max-width: 820px;
    margin: 0 auto;
}
.application-hero {
    margin-bottom: 1.5rem;
    border-radius: 12px;
    overflow: hidden;
}
.application-hero img {
    width: 100%;
    height: auto;
    display: block;
}

/* -------------------------------------------------------------------------
 * Bundled real-photo sections: certificate wall, shipment strip, factory gallery
 * ---------------------------------------------------------------------- */

/* Certificate wall */
.cert-section {
    padding: 2rem 0;
    background: var(--color-bg-alt);
}
.cert-wall {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 1.5rem 2.5rem;
}
.cert-logo {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 96px;
    transition: box-shadow .2s ease, transform .2s ease;
}
.cert-logo img {
    max-height: 72px;
    width: auto;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: .85;
    transition: filter .2s ease, opacity .2s ease;
}
.cert-logo:hover {
    box-shadow: 0 6px 18px rgba(0,0,0,.12);
    transform: translateY(-2px);
}
.cert-logo:hover img {
    filter: grayscale(0);
    opacity: 1;
}
.cert-caption {
    text-align: center;
    color: var(--color-text-light);
    margin-top: 1.25rem;
    font-size: .95rem;
}

/* Recent shipments strip */
.ship-strip {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: .5rem;
}
.ship-track {
    display: flex;
    gap: 1rem;
}
.ship-item {
    flex: 0 0 auto;
    width: 280px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,.08);
}
.ship-item img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    display: block;
}

/* Factory gallery (About page) */
.factory-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
}
.workshop-gallery {
    margin-top: 3rem;
}
.gallery-item {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,.08);
}
.gallery-item img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    display: block;
    transition: transform .3s ease;
}
.gallery-item:hover img {
    transform: scale(1.04);
}

/* Machine Videos (home) — click-to-play YouTube cards (2 rows x 3 columns) */
.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

@media (max-width: 1024px) {
    .video-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .video-grid { grid-template-columns: 1fr; }
}

.video-card {
    background: var(--color-bg, #ffffff);
    border: 1px solid var(--color-border, #e2e8f0);
    border-radius: var(--radius, 8px);
    overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition);
}

.video-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.video-cover {
    position: relative;
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    padding: 0;
    border: 0;
    background: var(--color-dark, #1a1a2e);
    cursor: pointer;
    overflow: hidden;
}

.video-cover img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-play {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 64px;
    height: 64px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    background-color: rgba(0, 86, 179, 0.85);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23ffffff' d='M8 5v14l11-7z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 55% center;
    background-size: 30px;
    transition: transform var(--transition), background-color var(--transition);
}

.video-cover:hover .video-play,
.video-cover:focus-visible .video-play {
    transform: translate(-50%, -50%) scale(1.1);
    background-color: var(--color-primary, #0056b3);
}

.video-cover:focus-visible {
    outline: 3px solid var(--color-secondary, #e6a00b);
    outline-offset: -3px;
}

.video-cover iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.video-title {
    margin: 0;
    padding: 0.9rem 1.1rem 1.1rem;
    font-size: 1.05rem;
    color: var(--color-text, #333333);
}

/* Home factory showcase band (full-width image under hero) */
.home-showcase {
    position: relative;
    width: 100%;
    line-height: 0;
    overflow: hidden;
}
.home-showcase img {
    width: 100%;
    height: 420px;
    object-fit: cover;
    display: block;
}
.home-showcase-caption {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(2, 30, 68, 0.38);
    padding: 1rem;
}
.home-showcase-caption h2 {
    color: #fff;
    font-size: clamp(1.4rem, 3vw, 2.4rem);
    text-align: center;
    margin: 0;
    text-shadow: 0 2px 14px rgba(0, 0, 0, 0.55);
}
@media (max-width: 768px) {
    .home-showcase img { height: 260px; }
}

/* -------------------------------------------------------------------------
 * SEO / Core Web Vitals (seo-audit.md — A3: prevent layout shift / CLS)
 * Card grids already declare aspect-ratio; these rules are the safety net for
 * full-width images and for any <img> added later without width/height.
 * ---------------------------------------------------------------------- */
img {
    max-width: 100%;
    height: auto;
}

.application-hero img {
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.cert-logo img {
    aspect-ratio: 3 / 4;
}