@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;500;600;700&family=Poppins:wght@400;500;600;700&display=swap');

/* CSS Variables */
:root {
    --primary: #64748B;        /* Slate Grey - Industrial Stone */
    --primary-dark: #475569;   /* Deep Slate */
    --secondary: #94A3B8;      /* Light Slate */
    --accent: #F97316;         /* Safety/Construction Orange */
    --accent-hover: #EA580C;   /* Deep Orange */
    --bg-main: #F8FAFC;        /* Marble Background */
    --bg-card: rgba(255, 255, 255, 0.85); /* Glass card light */
    --border-color: rgba(226, 232, 240, 0.9); /* Fine light border */
    --text-primary: #1E293B;   /* Slate 800 */
    --text-secondary: #475569; /* Slate 600 */
    --text-light: #64748B;     /* Slate 500 - Improved readability for accessibility */
    --white: #FFFFFF;
    --dark: #0F172A;           /* Slate 900 */
    --font-heading: 'Poppins', 'PingFang HK', 'PingFang SC', 'Microsoft JhengHei', 'Microsoft YaHei', sans-serif;
    --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang HK", "PingFang SC", "Microsoft JhengHei", sans-serif;
    --shadow-sm: 0 2px 8px rgba(100, 116, 139, 0.05);
    --shadow-md: 0 10px 25px -5px rgba(100, 116, 139, 0.1);
    --shadow-lg: 0 20px 40px -15px rgba(100, 116, 139, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --container-w: 1200px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-main);
    background-image: radial-gradient(at 0% 0%, rgba(241, 245, 249, 0.5) 0, transparent 50%),
                      radial-gradient(at 150% 150%, rgba(226, 232, 240, 0.5) 0, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--dark);
    font-weight: 600;
    line-height: 1.3;
}

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

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

/* Header & Floating Glass Navbar */
header {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 40px);
    max-width: var(--container-w);
    z-index: 1000;
}

.navbar {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    padding: 10px 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.nav-title {
    display: flex;
    flex-direction: column;
}

.nav-title h1 {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--dark);
}

.nav-title span {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 6px;
}

.nav-item a {
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-item a:hover {
    color: var(--accent);
    background: rgba(249, 115, 22, 0.05);
}

.nav-item.active a {
    color: var(--white);
    background: var(--accent);
}

.nav-item.active a:hover {
    background: var(--accent-hover);
}

/* Call to Action Button */
.nav-cta {
    background: var(--dark);
    color: var(--white) !important;
    padding: 10px 20px !important;
    border-radius: var(--radius-md) !important;
    font-size: 0.9rem !important;
    font-weight: 600 !important;
    box-shadow: var(--shadow-sm);
}

.nav-cta:hover {
    background: var(--accent) !important;
    color: var(--white) !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Hamburger mobile menu */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    border: none;
    background: transparent;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* Main Container spacing for fixed header */
main {
    padding-top: 100px;
    min-height: calc(100vh - 350px);
}

/* Section Common Styles */
.section {
    padding: 60px 20px;
    max-width: var(--container-w);
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-tag {
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    display: inline-block;
    margin-bottom: 8px;
    position: relative;
}

.section-tag::after {
    content: '';
    display: block;
    width: 30px;
    height: 2px;
    background: var(--accent);
    margin: 6px auto 0;
}

.section-title {
    font-size: 2.2rem;
    color: var(--dark);
    font-weight: 700;
    margin-bottom: 12px;
}

.section-desc {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1rem;
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(249, 115, 22, 0.2);
}

/* Button UI */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--accent);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
}

.btn-secondary {
    background: var(--white);
    color: var(--text-primary);
    border: 1px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--bg-main);
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.btn-dark {
    background: var(--dark);
    color: var(--white);
}

.btn-dark:hover {
    background: var(--accent);
    transform: translateY(-2px);
}

/* Footer Section */
footer {
    background: #0B132B;
    color: #8E9AAF;
    padding: 60px 20px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-container {
    max-width: var(--container-w);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 12px;
    color: var(--white);
}

.footer-logo h2 {
    color: var(--white);
    font-size: 1.3rem;
}

.footer-logo span {
    font-size: 0.75rem;
    color: var(--secondary);
    letter-spacing: 0.5px;
}

.footer-logo p {
    font-size: 0.85rem;
    color: #64748B;
    margin-top: 10px;
    line-height: 1.5;
}

.footer-links h3, .footer-contact h3 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 8px;
}

.footer-links h3::after, .footer-contact h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--accent);
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links ul a {
    font-size: 0.85rem;
}

.footer-links ul a:hover {
    color: var(--accent);
    padding-left: 5px;
}

.footer-contact ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 0.85rem;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.footer-contact li svg {
    width: 16px;
    height: 16px;
    fill: var(--accent);
    flex-shrink: 0;
    margin-top: 3px;
}

.footer-bottom {
    max-width: var(--container-w);
    margin: 0 auto;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: #475569;
}

.footer-bottom a:hover {
    color: var(--accent);
}

/* Page 1: index.html (Home) Specific styles */
.hero-slider {
    position: relative;
    height: 520px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin: 20px auto 40px;
    max-width: var(--container-w);
    box-shadow: var(--shadow-lg);
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    padding: 0 60px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.3) 60%, transparent 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
    color: var(--white);
}

.hero-content h2 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.05rem;
    color: #CBD5E1;
    margin-bottom: 28px;
    line-height: 1.6;
}

.hero-content .btn-group {
    display: flex;
    gap: 16px;
}

/* Feature categories home */
.prod-cats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 30px;
}

.cat-card {
    height: 280px;
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    cursor: pointer;
}

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

.cat-card:hover .cat-card-img {
    transform: scale(1.08);
}

.cat-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 24px;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.4) 70%, transparent 100%);
    color: var(--white);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    height: 100%;
}

.cat-card-overlay h3 {
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 600;
}

.cat-card-overlay p {
    color: #94A3B8;
    font-size: 0.8rem;
    margin-top: 4px;
}

/* Home News Section */
.home-news-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 30px;
}

.featured-project {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 380px;
    box-shadow: var(--shadow-md);
}

.featured-project img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-proj-card {
    position: absolute;
    bottom: 30px;
    left: 30px;
    right: 30px;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px;
    border-radius: var(--radius-md);
    color: var(--white);
}

.featured-proj-card h3 {
    color: var(--white);
    font-size: 1.3rem;
    margin-bottom: 6px;
}

.featured-proj-card p {
    color: #94A3B8;
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.home-news-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.news-item-card {
    display: flex;
    gap: 16px;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.news-item-card:hover {
    transform: translateX(5px);
    border-color: var(--accent);
}

.news-item-img {
    width: 90px;
    height: 70px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.news-item-info {
    flex: 1;
}

.news-item-date {
    font-size: 0.75rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 4px;
}

.news-item-title {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.4;
}

/* Page 2: about.html (About Us) specific styles */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
    align-items: center;
}

.about-images {
    position: relative;
    height: 420px;
}

.about-img-main {
    width: 85%;
    height: 340px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
}

.about-img-sub {
    width: 60%;
    height: 220px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 4px solid var(--white);
    position: absolute;
    bottom: 0;
    right: 0;
    z-index: 3;
}

.about-content h3 {
    font-size: 1.6rem;
    margin-bottom: 16px;
    color: var(--primary-dark);
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    border-right: 1px solid var(--border-color);
}

.stat-item:last-child {
    border-right: none;
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Culture values section */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.culture-card {
    text-align: center;
    padding: 24px;
}

.culture-card svg {
    width: 44px;
    height: 44px;
    fill: var(--accent);
    margin-bottom: 16px;
}

.culture-card h4 {
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.culture-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Page 3: products.html (Products & Services) specific styles */
.products-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.tab-btn.active {
    background: var(--accent);
    color: var(--white);
    border-color: var(--accent);
    box-shadow: 0 4px 10px rgba(249, 115, 22, 0.2);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.product-img-box {
    height: 220px;
    position: relative;
    overflow: hidden;
}

.product-img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-img-box img {
    transform: scale(1.06);
}

.product-details {
    padding: 20px;
}

.product-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.product-specs {
    list-style: none;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 10px;
    border-top: 1px solid var(--border-color);
    padding-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.product-specs li span {
    font-weight: 600;
    color: var(--text-primary);
}

.product-features-box {
    margin-top: 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-box {
    padding: 30px;
    text-align: center;
}

.feature-box svg {
    width: 48px;
    height: 48px;
    fill: var(--accent);
    margin-bottom: 20px;
}

.feature-box h4 {
    margin-bottom: 10px;
    font-size: 1.15rem;
}

.feature-box p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Page 4: solutions.html specific styles */
.solution-tabs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-bottom: 40px;
}

.sol-tab-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: center;
    transition: var(--transition);
}

.sol-tab-card:hover, .sol-tab-card.active {
    border-color: var(--accent);
    background: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.sol-tab-card.active h4 {
    color: var(--accent);
}

.sol-tab-card h4 {
    font-size: 1.05rem;
    margin-bottom: 6px;
}

.sol-tab-card p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.solution-details-box {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: center;
}

.solution-showcase-img {
    height: 380px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.solution-showcase-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.solution-info-card h3 {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.solution-info-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.solution-steps {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.solution-steps li {
    display: flex;
    gap: 12px;
    font-size: 0.9rem;
}

.solution-steps li span {
    background: var(--accent);
    color: var(--white);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

/* Project cases grid */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.case-card {
    height: 220px;
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

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

.case-card:hover img {
    transform: scale(1.06);
}

.case-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 16px;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.2) 70%, transparent 100%);
    color: var(--white);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.case-card-overlay h4 {
    color: var(--white);
    font-size: 0.95rem;
}

.case-card-overlay span {
    color: var(--secondary);
    font-size: 0.7rem;
    margin-top: 2px;
}

/* Page 5: news.html specific styles */
.news-page-grid {
    display: grid;
    grid-template-columns: 2.2fr 1fr;
    gap: 40px;
}

.news-main-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.news-blog-card {
    display: grid;
    grid-template-columns: 1.2fr 1.8fr;
    gap: 20px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.news-blog-img {
    height: 200px;
}

.news-blog-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-blog-details {
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.news-meta {
    display: flex;
    gap: 16px;
    font-size: 0.75rem;
    color: var(--accent);
    font-weight: 600;
}

.news-blog-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 8px 0 12px;
}

.news-blog-summary {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.5;
}

.sidebar-box {
    margin-bottom: 30px;
}

.sidebar-box h3 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.sidebar-box ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 0.85rem;
}

.sidebar-box ul a:hover {
    color: var(--accent);
}

.sidebar-post-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sidebar-post-item {
    display: flex;
    gap: 12px;
    align-items: center;
}

.sidebar-post-img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.sidebar-post-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.sidebar-post-date {
    font-size: 0.7rem;
    color: var(--text-light);
    margin-top: 2px;
}

/* Page 6: resources.html specific styles */
.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.knowledge-card {
    padding: 30px;
    border-radius: var(--radius-lg);
}

.knowledge-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
    color: var(--dark);
}

.knowledge-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.knowledge-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 4px;
}

.knowledge-link:hover {
    gap: 8px;
}

.download-section {
    background: #0B132B;
    border-radius: var(--radius-lg);
    padding: 50px 40px;
    margin-top: 50px;
    color: var(--white);
}

.download-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.download-text h2 {
    color: var(--white);
    margin-bottom: 10px;
}

.download-text p {
    color: #64748B;
    font-size: 0.9rem;
}

.download-btn-group {
    display: flex;
    gap: 16px;
}

/* Page 7: service.html specific styles */
.faq-grid {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    font-weight: 600;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-answer {
    padding: 20px 24px;
    background: rgba(255, 255, 255, 0.4);
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-top: none;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-question-arrow {
    transition: var(--transition);
}

.faq-item.active .faq-question-arrow {
    transform: rotate(180deg);
}

.workflow-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 15px;
    margin-top: 40px;
}

.workflow-card {
    text-align: center;
    position: relative;
    padding: 24px 16px;
}

.workflow-num {
    width: 40px;
    height: 40px;
    background: var(--accent);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin: 0 auto 16px;
    box-shadow: 0 4px 10px rgba(249, 115, 22, 0.2);
}

.workflow-card h4 {
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.workflow-card p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.workflow-card::after {
    content: '➔';
    position: absolute;
    top: 30px;
    right: -10px;
    font-size: 1.2rem;
    color: var(--secondary);
}

.workflow-card:last-child::after {
    display: none;
}

/* Page 8: contact.html specific styles */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-detail-card {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon-box {
    background: var(--accent);
    color: var(--white);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon-box svg {
    width: 20px;
    height: 20px;
    fill: var(--white);
}

.contact-detail-info h4 {
    font-size: 1.05rem;
    margin-bottom: 4px;
}

.contact-detail-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-input, .form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.8);
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: var(--transition);
}

.form-input:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.map-container {
    height: 380px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-top: 40px;
}

.map-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .prod-cats-grid, .products-grid, .knowledge-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-container {
        grid-template-columns: 1fr 1fr;
    }
    .contact-grid, .about-grid, .solution-details-box, .news-page-grid {
        grid-template-columns: 1fr;
    }
    .workflow-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .workflow-card::after {
        display: none;
    }
}

@media (max-width: 768px) {
    header {
        top: 10px;
        width: calc(100% - 20px);
    }
    .navbar {
        padding: 10px 16px;
    }
    .nav-toggle {
        display: flex;
    }
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 65px;
        left: 0;
        width: 100%;
        background: var(--bg-card);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 16px;
        box-shadow: var(--shadow-lg);
    }
    .nav-menu.show {
        display: flex;
    }
    .nav-item a {
        display: block;
        padding: 10px 16px;
    }
    .hero-slider {
        height: 380px;
    }
    .hero-content h2 {
        font-size: 2rem;
    }
    .prod-cats-grid, .products-grid, .knowledge-grid, .features-grid, .stats-grid, .culture-grid, .cases-grid {
        grid-template-columns: 1fr;
    }
    .footer-container {
        grid-template-columns: 1fr;
    }
    .workflow-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   OPTIMIZATION & INTERACTIVE STYLES
   ========================================== */

/* 1. Scroll Reveal Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* 2. Auto-sliding Hero Carousel */
.hero-slider {
    position: relative;
    height: 520px;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease-in-out, visibility 1s ease-in-out;
}

.hero-slide.active {
    opacity: 1;
    visibility: visible;
}

/* 3. Lightbox Modal Overlay */
.lightbox-modal {
    position: fixed;
    z-index: 2000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.lightbox-modal.show {
    opacity: 1;
    pointer-events: auto;
}

.lightbox-content {
    max-width: 85%;
    max-height: 80%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.lightbox-modal.show .lightbox-content {
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: 30px;
    right: 40px;
    color: var(--white);
    font-size: 2.5rem;
    cursor: pointer;
    font-weight: 300;
    transition: var(--transition);
}

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

/* 4. Bookmatch Simulator widget */
.bookmatch-simulator {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 30px;
    margin-top: 30px;
    align-items: center;
}

.bookmatch-preview {
    position: relative;
    height: 360px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    display: flex;
}

.bm-panel {
    flex: 1;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.5s ease-in-out;
}

.bm-panel-left {
    border-right: 1px dashed rgba(255, 255, 255, 0.3);
}

.bm-panel-right.mirrored {
    transform: scaleX(-1);
}

.bm-toggle-bar {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 16px;
}

.bm-btn {
    padding: 8px 20px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background: var(--white);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition);
}

.bm-btn.active {
    background: var(--accent);
    color: var(--white);
    border-color: var(--accent);
    box-shadow: 0 4px 10px rgba(249, 115, 22, 0.2);
}

/* 5. Interactive Stone Calculator widget */
.calc-box {
    max-width: 650px;
    margin: 40px auto 0;
}

.calc-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.calc-result-card {
    margin-top: 24px;
    background: rgba(249, 115, 22, 0.04);
    border: 1px solid rgba(249, 115, 22, 0.2);
    padding: 24px;
    border-radius: var(--radius-md);
    display: none;
}

.calc-result-card.show {
    display: block;
    animation: fadeIn 0.4s ease forwards;
}

.calc-result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 16px;
    border-top: 1px solid rgba(249, 115, 22, 0.1);
    padding-top: 16px;
}

.calc-result-item {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.calc-result-item span {
    font-weight: 700;
    color: var(--accent);
    font-size: 1.25rem;
}

/* 6. Back-to-Top circular scroll progress button */
.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--white);
    border: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top-btn svg {
    width: 16px;
    height: 16px;
    fill: var(--text-primary);
    transition: var(--transition);
}

.scroll-top-btn:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
}

.scroll-top-btn:hover svg {
    fill: var(--accent);
}

.scroll-top-progress {
    position: absolute;
    top: -1px;
    left: -1px;
    width: 46px;
    height: 46px;
    transform: rotate(-90deg);
}

.scroll-top-progress circle {
    fill: none;
    stroke: var(--accent);
    stroke-width: 2px;
    stroke-dasharray: 140;
    stroke-dashoffset: 140;
    transition: stroke-dashoffset 0.1s linear;
}

/* 7. Scrolled floating glass header style */
.navbar.scrolled {
    background: rgba(15, 23, 42, 0.9);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-lg);
    padding: 8px 24px;
}

.navbar.scrolled .nav-title h1 {
    color: var(--white);
}

.navbar.scrolled .nav-item a {
    color: #94A3B8;
}

.navbar.scrolled .nav-item a:hover {
    color: var(--accent);
    background: rgba(255, 255, 255, 0.05);
}

.navbar.scrolled .nav-item.active a {
    color: var(--white);
    background: var(--accent);
}

.navbar.scrolled .nav-toggle span {
    background: var(--white);
}

/* 8. Hero Slider Navigation Controls */
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
}

.slider-arrow:hover {
    background: var(--accent);
    color: var(--white);
    border-color: var(--accent);
    transform: translateY(-50%) scale(1.05);
}

.slider-prev {
    left: 30px;
}

.slider-next {
    right: 30px;
}

.slider-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.slider-dot:hover, .slider-dot.active {
    background: var(--accent);
    transform: scale(1.2);
}

@media (max-width: 768px) {
    .slider-arrow {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
    .slider-prev {
        left: 15px;
    }
    .slider-next {
        right: 15px;
    }
    .slider-dots {
        bottom: 20px;
    }
}