/* ============================================
   PRECISION DOOR & WINDOW MANUFACTURER
   European & American Architectural Minimalist Style
   ============================================ */

/* --- CSS Variables --- */
:root {
  --color-primary: #172439;
  --color-gold: #BFA88A;
  --color-blue: #3B82F6;
  --color-bg: #F5F7FA;
  --color-body: #64748B;
  --color-heading: #0F172A;
  --color-white: #FFFFFF;
  --color-border: #E2E8F0;
  --color-dark-bg: #0B1622;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.08);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-body);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--color-heading);
  line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 2.8rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p { margin-bottom: 1rem; }

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

ul { list-style: none; }

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

/* --- Utility --- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
}

.section {
  padding: 120px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 72px;
}

.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 16px;
}

.section-title {
  margin-bottom: 20px;
}

.section-desc {
  max-width: 640px;
  margin: 0 auto;
  font-size: 17px;
  color: var(--color-body);
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(23, 36, 57, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
}

.header.scrolled {
  background: rgba(23, 36, 57, 0.98);
  box-shadow: 0 4px 24px rgba(0,0,0,0.15);
}

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

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

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  color: var(--color-primary);
  letter-spacing: 1px;
}

.logo-text {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 1px;
  line-height: 1.3;
}

.logo-text small {
  display: block;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 2px;
  color: var(--color-gold);
  text-transform: uppercase;
}

.nav-list {
  display: flex;
  gap: 36px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.5px;
  position: relative;
  padding: 4px 0;
  transition: color var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-gold);
  transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.header-cta {
  padding: 10px 28px;
  background: transparent;
  border: 1.5px solid var(--color-gold);
  color: var(--color-gold);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
}

.header-cta:hover {
  background: var(--color-gold);
  color: var(--color-primary);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.menu-toggle span {
  width: 28px;
  height: 2px;
  background: var(--color-white);
  transition: all var(--transition);
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(23,36,57,0.95) 0%, rgba(23,36,57,0.85) 40%, rgba(23,36,57,0.7) 100%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(255,255,255,0.008) 2px,
      rgba(255,255,255,0.008) 4px
    );
}

.hero-pattern {
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background:
    linear-gradient(90deg, rgba(191,168,138,0.06) 1px, transparent 1px),
    linear-gradient(0deg, rgba(191,168,138,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: rgba(191,168,138,0.12);
  border: 1px solid rgba(191,168,138,0.3);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 36px;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-gold);
}

.hero-title {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.1;
  margin-bottom: 28px;
}

.hero-title span {
  color: var(--color-gold);
}

.hero-desc {
  font-size: 18px;
  color: rgba(255,255,255,0.6);
  max-width: 560px;
  margin-bottom: 48px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-gold);
  color: var(--color-primary);
}

.btn-primary:hover {
  background: #d4bd9e;
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.3);
  color: var(--color-white);
}

.btn-outline:hover {
  border-color: var(--color-white);
  transform: translateY(-2px);
}

.hero-stats {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 60px;
  margin-top: 80px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.hero-stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-gold);
  line-height: 1;
}

.hero-stat-label {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-top: 8px;
  letter-spacing: 0.5px;
}

/* --- About --- */
.about {
  background: var(--color-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

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

.about-image {
  width: 100%;
  aspect-ratio: 4/5;
  background: linear-gradient(135deg, #1a2d45, #0f1d30);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.about-image-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 40px;
}

.about-image-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: rgba(191,168,138,0.15);
  border: 2px solid var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-image-icon svg {
  width: 36px;
  height: 36px;
  color: var(--color-gold);
}

.about-image-text {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-gold);
}

.about-accent {
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 200px;
  height: 200px;
  border: 3px solid var(--color-gold);
  z-index: 0;
}

.about-content h2 {
  margin-bottom: 24px;
}

.about-content .lead {
  font-size: 18px;
  color: var(--color-heading);
  font-weight: 500;
  margin-bottom: 24px;
  line-height: 1.6;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 36px;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.about-feature-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-feature-icon svg {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
}

.about-feature-text h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 4px;
}

.about-feature-text p {
  font-size: 13px;
  color: var(--color-body);
  margin: 0;
}

/* --- Products --- */
.products {
  background: var(--color-bg);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.product-card {
  background: var(--color-white);
  overflow: hidden;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border);
}

.product-image {
  height: 260px;
  background: linear-gradient(135deg, #f0f2f5, #e2e6eb);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-image-inner {
  text-align: center;
  padding: 32px;
}

.product-image-icon {
  width: 64px;
  height: 64px;
  background: rgba(23,36,57,0.06);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-image-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}

.product-image-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-gold);
}

.product-info {
  padding: 28px;
}

.product-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 8px;
}

.product-desc {
  font-size: 14px;
  color: var(--color-body);
  margin: 0;
  line-height: 1.5;
}

.product-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.product-tag {
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 500;
  color: var(--color-body);
  background: var(--color-bg);
  letter-spacing: 0.5px;
}

/* --- Advantages --- */
.advantages {
  background: var(--color-primary);
  color: var(--color-white);
}

.advantages .section-label { color: var(--color-gold); }
.advantages .section-title { color: var(--color-white); }
.advantages .section-desc { color: rgba(255,255,255,0.55); }

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.06);
}

.advantage-card {
  background: var(--color-primary);
  padding: 48px 32px;
  text-align: center;
  transition: all var(--transition);
}

.advantage-card:hover {
  background: rgba(255,255,255,0.03);
}

.advantage-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  background: rgba(191,168,138,0.1);
  border: 1px solid rgba(191,168,138,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
}

.advantage-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-gold);
}

.advantage-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
}

.advantage-desc {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin: 0;
  line-height: 1.5;
}

/* --- Projects --- */
.projects {
  background: var(--color-white);
}

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

.project-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.project-image {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #e8ecf1, #d5dbe3);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.6s ease;
}

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

.project-image-content {
  text-align: center;
  padding: 24px;
}

.project-image-icon {
  width: 56px;
  height: 56px;
  background: rgba(23,36,57,0.06);
  margin: 0 auto 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-image-icon svg {
  width: 26px;
  height: 26px;
  color: var(--color-primary);
}

.project-image-type {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-gold);
}

.project-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 28px;
  background: linear-gradient(transparent, rgba(15,23,42,0.95));
  transition: all var(--transition);
}

.project-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 6px;
}

.project-location {
  font-size: 12px;
  color: var(--color-gold);
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* --- CTA Banner --- */
.cta-banner {
  background: var(--color-gold);
  padding: 80px 0;
  text-align: center;
}

.cta-banner h2 {
  color: var(--color-primary);
  margin-bottom: 16px;
}

.cta-banner p {
  color: rgba(23,36,57,0.7);
  max-width: 560px;
  margin: 0 auto 32px;
  font-size: 17px;
}

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

.btn-dark:hover {
  background: #1f3350;
  transform: translateY(-2px);
}

/* --- News --- */
.news {
  background: var(--color-bg);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-card {
  background: var(--color-white);
  overflow: hidden;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border);
}

.news-image {
  height: 200px;
  background: linear-gradient(135deg, #eceff3, #dde1e7);
  display: flex;
  align-items: center;
  justify-content: center;
}

.news-image-text {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--color-body);
  text-transform: uppercase;
}

.news-body {
  padding: 28px;
}

.news-date {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-gold);
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.news-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 12px;
  line-height: 1.4;
}

.news-excerpt {
  font-size: 14px;
  color: var(--color-body);
  margin: 0;
  line-height: 1.5;
}

.news-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.5px;
  transition: gap var(--transition);
}

.news-link:hover {
  color: var(--color-gold);
  gap: 12px;
}

/* --- Contact --- */
.contact {
  background: var(--color-white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
}

.contact-info h2 {
  margin-bottom: 20px;
}

.contact-info > p {
  margin-bottom: 40px;
  font-size: 17px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-item-icon {
  width: 52px;
  height: 52px;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item-icon svg {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
}

.contact-item-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 4px;
}

.contact-item-value {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-heading);
}

.contact-form-wrap {
  background: var(--color-bg);
  padding: 48px;
}

.contact-form-wrap h3 {
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  font-size: 15px;
  font-family: var(--font-sans);
  color: var(--color-heading);
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-gold);
}

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

.btn-submit {
  width: 100%;
  padding: 16px;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
}

.btn-submit:hover {
  background: #1f3350;
}

/* --- Footer --- */
.footer {
  background: var(--color-dark-bg);
  color: rgba(255,255,255,0.55);
  padding: 80px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 56px;
  padding-bottom: 60px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.6;
  margin-top: 20px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-logo-icon {
  width: 40px;
  height: 40px;
  background: var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
  color: var(--color-primary);
}

.footer-logo-text {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.5px;
}

.footer h4 {
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 24px;
  text-transform: uppercase;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,0.45);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--color-gold);
}

.footer-contact-item {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 14px;
  line-height: 1.5;
}

.footer-contact-item svg {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--color-gold);
  margin-top: 3px;
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

.footer-bottom a {
  color: rgba(255,255,255,0.4);
  transition: color var(--transition);
}

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

/* --- Floating Customer Service --- */
.customer-service {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cs-item {
  position: relative;
  width: 52px;
  height: 52px;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
}

.cs-item svg {
  width: 22px;
  height: 22px;
  color: var(--color-white);
}

.cs-item:hover {
  background: var(--color-gold);
}

.cs-tooltip {
  position: absolute;
  right: 64px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-white);
  color: var(--color-heading);
  padding: 12px 20px;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--transition);
}

.cs-tooltip::after {
  content: '';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 12px;
  height: 12px;
  background: var(--color-white);
}

.cs-item:hover .cs-tooltip {
  opacity: 1;
  visibility: visible;
}

.cs-qrcode-popup {
  position: absolute;
  right: 64px;
  bottom: 0;
  background: var(--color-white);
  padding: 16px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  text-align: center;
}

.cs-qrcode-popup::after {
  content: '';
  position: absolute;
  right: -6px;
  bottom: 16px;
  transform: rotate(45deg);
  width: 12px;
  height: 12px;
  background: var(--color-white);
}

.cs-qrcode-popup img {
  width: 140px;
  height: 140px;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--color-body);
}

.cs-qrcode-popup p {
  font-size: 12px;
  color: var(--color-body);
  margin: 8px 0 0;
}

.cs-item:hover .cs-qrcode-popup {
  opacity: 1;
  visibility: visible;
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 998;
  border: none;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-gold);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  color: var(--color-white);
}

/* --- Mobile Menu --- */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 320px;
  height: 100vh;
  background: var(--color-primary);
  z-index: 2000;
  padding: 32px;
  transition: right var(--transition);
  overflow-y: auto;
}

.mobile-nav.open {
  right: 0;
}

.mobile-nav-close {
  display: block;
  margin-left: auto;
  margin-bottom: 48px;
  background: none;
  border: none;
  color: var(--color-white);
  cursor: pointer;
  padding: 8px;
}

.mobile-nav-close svg {
  width: 24px;
  height: 24px;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-nav-link {
  display: block;
  padding: 14px 0;
  font-size: 16px;
  font-weight: 500;
  color: rgba(255,255,255,0.7);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color var(--transition);
}

.mobile-nav-link:hover {
  color: var(--color-gold);
}

.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1500;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.mobile-overlay.open {
  opacity: 1;
  visibility: visible;
}

/* --- Page Banner (Sub-page Hero) --- */
.page-banner {
  padding: 160px 0 80px;
  background: var(--color-primary);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(23,36,57,0.95), rgba(23,36,57,0.8)),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(255,255,255,0.006) 2px,
      rgba(255,255,255,0.006) 4px
    );
}

.page-banner-content {
  position: relative;
  z-index: 1;
}

.page-banner-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 16px;
}

.page-banner-title {
  color: var(--color-white);
  margin-bottom: 16px;
}

.page-banner-desc {
  font-size: 17px;
  color: rgba(255,255,255,0.55);
  max-width: 560px;
  margin: 0 auto;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  padding: 16px 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumbs-list {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-body);
}

.breadcrumbs-list a {
  color: var(--color-body);
  transition: color var(--transition);
}

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

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

.breadcrumbs-list .current {
  color: var(--color-heading);
  font-weight: 500;
}

/* --- Product Detail --- */
.product-detail {
  padding: 100px 0;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.product-detail-gallery {
  position: sticky;
  top: 100px;
}

.product-detail-main-image {
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, #f0f2f5, #dde1e8);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.product-detail-main-image-inner {
  text-align: center;
  padding: 48px;
}

.product-detail-main-image-inner svg {
  width: 80px;
  height: 80px;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.product-detail-main-image-inner span {
  display: block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--color-gold);
  text-transform: uppercase;
}

.product-detail-thumbs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.product-detail-thumb {
  aspect-ratio: 1;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}

.product-detail-thumb:hover {
  border-color: var(--color-gold);
}

.product-detail-thumb svg {
  width: 32px;
  height: 32px;
  color: var(--color-body);
}

.product-detail-info h2 {
  margin-bottom: 24px;
}

.product-detail-desc {
  font-size: 17px;
  line-height: 1.7;
  margin-bottom: 32px;
}

.product-specs {
  margin-bottom: 36px;
}

.product-specs h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--color-heading);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
}

.specs-table tr {
  border-bottom: 1px solid var(--color-border);
}

.specs-table td {
  padding: 14px 0;
  font-size: 14px;
}

.specs-table td:first-child {
  font-weight: 600;
  color: var(--color-heading);
  width: 160px;
}

.product-cta-wrap {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- News Detail --- */
.news-detail {
  padding: 80px 0;
}

.news-detail-layout {
  max-width: 800px;
  margin: 0 auto;
}

.news-detail-header {
  margin-bottom: 40px;
}

.news-detail-date {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--color-gold);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.news-detail-header h1 {
  margin-bottom: 20px;
}

.news-detail-meta {
  display: flex;
  gap: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-body);
}

.news-detail-featured-image {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, #e8ecf1, #d5dbe3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 48px;
}

.news-detail-featured-image span {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--color-body);
  text-transform: uppercase;
}

.news-detail-body {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-body);
}

.news-detail-body h2 {
  font-size: 1.5rem;
  margin: 48px 0 16px;
}

.news-detail-body h3 {
  font-size: 1.2rem;
  margin: 36px 0 12px;
}

.news-detail-body p {
  margin-bottom: 20px;
}

.news-detail-body blockquote {
  margin: 32px 0;
  padding: 28px 32px;
  border-left: 4px solid var(--color-gold);
  background: var(--color-bg);
  font-style: italic;
  color: var(--color-heading);
  font-size: 18px;
}

.news-detail-body ul {
  list-style: disc;
  margin: 20px 0;
  padding-left: 24px;
}

.news-detail-body ul li {
  margin-bottom: 8px;
}

.news-detail-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 48px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  transition: color var(--transition);
}

.news-detail-back:hover {
  color: var(--color-gold);
}

/* --- Product Category Grid --- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.category-card {
  background: var(--color-white);
  overflow: hidden;
  transition: all var(--transition);
  border: 1px solid var(--color-border);
  display: block;
  color: inherit;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-gold);
  color: inherit;
}

.category-card-image {
  height: 280px;
  background: linear-gradient(135deg, #f0f2f5, #e2e6eb);
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-card-image-inner {
  text-align: center;
}

.category-card-image-inner svg {
  width: 64px;
  height: 64px;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.category-card-image-inner span {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--color-gold);
  text-transform: uppercase;
}

.category-card-body {
  padding: 32px;
}

.category-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 10px;
}

.category-card-body p {
  font-size: 14px;
  color: var(--color-body);
  margin: 0;
  line-height: 1.5;
}

/* --- Pagination --- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 60px;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  color: var(--color-body);
  transition: all var(--transition);
}

.pagination a:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

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

.pagination .dots {
  border: none;
}

/* --- About: Timeline --- */
.about-timeline {
  padding: 100px 0 0;
}

.timeline {
  position: relative;
  padding-left: 36px;
  border-left: 2px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -46px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-gold);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-gold);
}

.timeline-year {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--color-gold);
  margin-bottom: 6px;
}

.timeline-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 8px;
}

.timeline-desc {
  font-size: 14px;
  color: var(--color-body);
  margin: 0;
  line-height: 1.6;
}

/* --- About: Team --- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

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

.team-avatar {
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, #e8ecf1, #d5dbe3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.team-avatar svg {
  width: 48px;
  height: 48px;
  color: var(--color-body);
}

.team-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 4px;
}

.team-role {
  font-size: 13px;
  color: var(--color-gold);
  font-weight: 500;
  letter-spacing: 1px;
}

/* --- Contact: Map --- */
.contact-map {
  margin-top: 80px;
}

.contact-map-inner {
  width: 100%;
  height: 400px;
  background: linear-gradient(135deg, #e8ecf1, #d5dbe3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-map-inner span {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--color-body);
  text-transform: uppercase;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .container { padding: 0 24px; }
  .section { padding: 80px 0; }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .hero-stats {
    gap: 40px;
  }

  .category-grid,
  .product-detail-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  .product-detail-gallery {
    position: static;
  }
}

@media (max-width: 768px) {
  .nav-list,
  .header-cta {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .product-grid,
  .project-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    justify-content: center;
  }

  .customer-service {
    right: 12px;
  }

  .category-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }

  .page-banner {
    padding: 120px 0 60px;
  }

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