/* ========================================
   Chengdu KETE - Oil & Gas Engineering
   Multi-Page Static Website Stylesheet
   ======================================== */

/* ---- CSS Variables ---- */
:root {
  --color-bg-primary: #0a0e1a;
  --color-bg-secondary: #0d1220;
  --color-bg-card: #111827;
  --color-bg-card-hover: #1a2035;
  --color-bg-footer: #080c14;
  --color-surface: rgba(255,255,255,0.05);
  --color-surface-hover: rgba(255,255,255,0.08);
  --color-border: rgba(255,255,255,0.08);
  --color-border-hover: rgba(255,255,255,0.15);
  --color-brand-orange: #f97316;
  --color-brand-orange-light: #fb923c;
  --color-brand-orange-glow: rgba(249,115,22,0.3);
  --color-brand-teal: #14b8a6;
  --color-brand-teal-light: #2dd4bf;
  --color-brand-teal-glow: rgba(20,184,166,0.3);
  --color-accent-blue: #3b82f6;
  --color-text-primary: #f8fafc;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --shadow-card: 0 4px 20px rgba(0,0,0,0.3);
  --shadow-glow-orange: 0 0 30px rgba(249,115,22,0.2);
  --shadow-glow-teal: 0 0 30px rgba(20,184,166,0.2);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  color: inherit;
}

ul, ol {
  list-style: none;
}

input, textarea {
  font-family: inherit;
  font-size: inherit;
}

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

h1 { font-size: clamp(2rem, 4vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.8rem); }
h4 { font-size: clamp(1rem, 1.5vw, 1.3rem); }

.text-gradient-orange {
  background: linear-gradient(135deg, var(--color-brand-orange), var(--color-brand-orange-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-teal {
  background: linear-gradient(135deg, var(--color-brand-teal), var(--color-brand-teal-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-brand {
  background: linear-gradient(135deg, var(--color-brand-orange), var(--color-brand-teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding {
  padding: 80px 0;
}

@media (max-width: 768px) {
  .section-padding {
    padding: 50px 0;
  }
  .container {
    padding: 0 16px;
  }
}

/* ---- Header ---- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 70px;
  background: rgba(10,14,26,0.85);

  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.header.scrolled {
  background: rgba(10,14,26,0.95);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text-primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-brand-orange), var(--color-brand-teal));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.logo span {
  color: var(--color-brand-orange);
}

/* ---- Navigation ---- */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-desktop a {
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: 6px;
  transition: all var(--transition-fast);
}

.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--color-text-primary);
  background: var(--color-surface);
}

/* ---- Dropdown Menu ---- */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: 6px;
  transition: all var(--transition-fast);
  cursor: pointer;
  user-select: none;
}

.nav-dropdown-toggle:hover,
.nav-dropdown-toggle.active {
  color: var(--color-text-primary);
  background: var(--color-surface);
}

.nav-dropdown-arrow {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  transition: transform var(--transition-fast);
  margin-left: 2px;
}

.nav-dropdown.open .nav-dropdown-arrow {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 260px;
  background: rgba(17, 24, 39, 0.98);

  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 8px;
  margin-top: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: 1001;
  box-shadow: 0 20px 50px rgba(0,0,0,0.4);
}

.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-menu a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-dropdown-menu a:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.nav-dropdown-menu a.active {
  color: var(--color-brand-orange);
  background: rgba(249,115,22,0.08);
}

.nav-dropdown-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.nav-dropdown-icon.orange {
  background: rgba(249,115,22,0.12);
}

.nav-dropdown-icon.teal {
  background: rgba(20,184,166,0.12);
}

.nav-dropdown-icon.purple {
  background: rgba(139,92,246,0.12);
}

.nav-dropdown-label {
  display: block;
  font-weight: 600;
  color: var(--color-text-primary);
}

.nav-dropdown-desc {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 2px;
  white-space: nowrap;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 8px;
  transition: all var(--transition-base);
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-brand-orange), #ea580c);
  color: white;
  box-shadow: 0 4px 15px rgba(249,115,22,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(249,115,22,0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--color-brand-teal);
  border: 1px solid var(--color-brand-teal);
}

.btn-secondary:hover {
  background: var(--color-brand-teal);
  color: white;
}

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

.btn-outline:hover {
  border-color: var(--color-brand-orange);
  color: var(--color-brand-orange);
}

/* ---- Mobile Menu ---- */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  z-index: 1001;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all var(--transition-fast);
  border-radius: 1px;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  bottom: 0;
  background: #0a0e1a;
  z-index: 9999;
  padding: 40px 24px;
  flex-direction: column;
  gap: 8px;
  isolation: isolate;
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav a {
  padding: 16px 20px;
  font-size: 1.1rem;
  font-weight: 500;
  color: #ffffff;
  border-radius: 8px;
  transition: all var(--transition-fast);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--color-brand-orange);
  background: var(--color-surface);
}

@media (max-width: 768px) {
  .nav-desktop, .header-actions .btn {
    display: none;
  }
  .mobile-menu-toggle {
    display: flex;
  }
}

/* ---- Hero Section ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 70px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10,14,26,0.7) 0%,
    rgba(10,14,26,0.5) 40%,
    rgba(10,14,26,0.85) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.hero h1 {
  margin-bottom: 20px;
  line-height: 1.15;
}

.hero-description {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  animation: bounce 2s infinite;
  cursor: pointer;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* ---- Section Headers ---- */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-header-left {
  text-align: left;
  max-width: 700px;
  margin: 0 0 60px 0;
}

.section-label {
  display: inline-block;
  padding: 6px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-brand-orange);
  margin-bottom: 16px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ---- Feature Cards ---- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 32px;
  transition: all var(--transition-base);
}

.feature-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-icon.orange {
  background: rgba(249,115,22,0.15);
}

.feature-icon.teal {
  background: rgba(20,184,166,0.15);
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ---- Service Cards ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px;
}

.service-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.service-card-image {
  width: 100%;
  height: 220px;
  overflow: hidden;
}

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

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

.service-card-content {
  padding: 28px;
}

.service-card-content h3 {
  margin-bottom: 10px;
  font-size: 1.3rem;
}

.service-card-content p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-brand-orange);
  transition: gap var(--transition-fast);
}

.service-link:hover {
  gap: 10px;
}

/* ---- Stats Section ---- */
.stats-section {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
}

.stat-item {
  text-align: center;
  padding: 24px;
}

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* ---- Case Studies ---- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.case-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.case-card-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
}

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

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

.case-card-content {
  padding: 24px;
}

.case-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(20,184,166,0.15);
  color: var(--color-brand-teal);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 50px;
  margin-bottom: 10px;
}

.case-card-content h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.case-card-content p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---- News Cards ---- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

.news-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.news-card-image {
  width: 100%;
  height: 180px;
  overflow: hidden;
}

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

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

.news-card-content {
  padding: 20px;
}

.news-date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.news-card-content h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  line-height: 1.4;
}

.news-card-content p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---- Contact Section ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

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

.contact-info-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-info-item h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.contact-info-item p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ---- Contact Form ---- */
.contact-form {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 40px;
}

@media (max-width: 768px) {
  .contact-form {
    padding: 24px;
  }
}

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

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--color-text-secondary);
}

.form-group label .required {
  color: var(--color-brand-orange);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  color: var(--color-text-primary);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-brand-orange);
  box-shadow: 0 0 0 3px rgba(249,115,22,0.15);
}

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

.form-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 6px;
}

.g-recaptcha-placeholder {
  margin-bottom: 20px;
  padding: 16px;
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: 10px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ---- Form Success Message ---- */
.form-success {
  display: none;
  text-align: center;
  padding: 40px;
}

.form-success.active {
  display: block;
}

.form-success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(20,184,166,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 20px;
}

/* ---- Page Hero (smaller) ---- */
.page-hero {
  position: relative;
  min-height: 50vh;
  display: flex;
  align-items: center;
  padding-top: 70px;
  overflow: hidden;
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,14,26,0.8) 0%, rgba(10,14,26,0.95) 100%);
  z-index: 1;
}

.page-hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.page-hero h1 {
  margin-bottom: 16px;
}

.page-hero p {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  line-height: 1.7;
}

/* ---- Breadcrumb ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--color-brand-orange);
}

.breadcrumb-separator {
  color: var(--color-text-muted);
}

/* ---- Content Sections ---- */
.content-section {
  padding: 60px 0;
}

.content-block {
  max-width: 800px;
}

.content-block h2 {
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.content-block h3 {
  margin: 30px 0 15px;
  color: var(--color-brand-teal);
}

.content-block p {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.content-block ul {
  margin: 16px 0;
  padding-left: 20px;
  list-style: disc;
}

.content-block ul li {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 8px;
}

.content-block ul li::marker {
  color: var(--color-brand-orange);
}

/* ---- Tech Showcase ---- */
.tech-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

@media (max-width: 768px) {
  .tech-showcase {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

.tech-showcase-image {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.tech-showcase-image img {
  width: 100%;
  height: auto;
}

.tech-showcase-content h3 {
  margin-bottom: 16px;
}

.tech-showcase-content p {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.tech-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.tech-spec-item {
  padding: 16px;
  background: var(--color-surface);
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.tech-spec-item .spec-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-brand-orange);
}

.tech-spec-item .spec-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ---- Image Grid ---- */
.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.image-grid-item {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.image-grid-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.image-grid-caption {
  padding: 16px;
  background: var(--color-bg-card);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* ---- Timeline ---- */
.timeline {
  position: relative;
  padding-left: 30px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-brand-orange), var(--color-brand-teal));
}

.timeline-item {
  position: relative;
  padding-bottom: 40px;
}

.timeline-dot {
  position: absolute;
  left: -36px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-brand-orange);
  border: 2px solid var(--color-bg-primary);
}

.timeline-year {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-brand-orange);
  margin-bottom: 8px;
}

.timeline-item h4 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.timeline-item p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ---- Footer ---- */
.footer {
  background: var(--color-bg-footer);
  border-top: 1px solid var(--color-border);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 16px;
}

.footer-column h4 {
  font-size: 0.95rem;
  margin-bottom: 20px;
  color: var(--color-text-primary);
}

.footer-column ul li {
  margin-bottom: 12px;
}

.footer-column ul li a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-column ul li a:hover {
  color: var(--color-brand-orange);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  transition: color var(--transition-fast);
}

.footer-bottom-links a:hover {
  color: var(--color-text-secondary);
}

/* ---- Animations ---- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-fade-in {
  animation: fadeIn 0.6s ease forwards;
}

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

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

/* ---- Utilities ---- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

/* ---- Back to Top Button ---- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 999;
}

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

.back-to-top:hover {
  background: var(--color-brand-orange);
  color: white;
  border-color: var(--color-brand-orange);
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border-hover);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ---- Selection ---- */
::selection {
  background: rgba(249,115,22,0.3);
  color: var(--color-text-primary);
}

/* ---- Print ---- */
@media print {
  .header, .footer, .back-to-top, .hero-scroll {
    display: none !important;
  }
  body {
    background: white;
    color: black;
  }
}