/* ============================================
   CSS Reset & Base Variables
   ============================================ */

:root {
  /* Color Palette - Refined Luxury */
  --color-primary: #1a2a4a;
  --color-primary-dark: #0f1a30;
  --color-accent: #c9a863;
  --color-accent-light: #dcb87a;
  --color-text: #2d3142;
  --color-text-light: #6b7280;
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-border: #e5e7eb;
  
  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;
  
  /* Container */
  --container-max: 1280px;
  --container-padding: 1.5rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.2;
  font-weight: 600;
  color: var(--color-primary);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  z-index: 1000;
  transition: var(--transition-smooth);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 1.25rem var(--container-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.logo-divider {
  width: 1px;
  height: 1.5rem;
  background: var(--color-border);
}

.logo-en {
  font-size: 0.875rem;
  color: var(--color-text-light);
  font-weight: 400;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
  padding: 0.5rem 0;
}

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

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

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

.lang-switch {
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.lang-switch:hover {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: white;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(26, 42, 74, 0.8) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(201, 168, 99, 0.15) 0%, transparent 50%),
    linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  background-image: 
    linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%),
    url('../images/hero.jpg');
  background-blend-mode: overlay;
  background-size: cover;
  background-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(farthest-corner at 0% 0%, rgba(201, 168, 99, 0.12) 0%, transparent 60%),
    linear-gradient(to right, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.2) 100%);
  /* Add subtle grain texture */
  background-image: 
    radial-gradient(farthest-corner at 0% 0%, rgba(201, 168, 99, 0.12) 0%, transparent 60%),
    linear-gradient(to right, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.2) 100%);
  background-blend-mode: overlay;
}

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

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
  color: white;
}

.hero-text {
  padding-top: 2rem;
}

.hero-subtitle {
  font-size: 1rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent-light);
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(30px);
}

.hero-title {
  color: white;
  margin-bottom: 2rem;
  line-height: 1.1;
  opacity: 0;
  transform: translateY(30px);
}

.gold-text {
  color: var(--color-accent-light);
}

.hero-description {
  font-size: 1.15rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2.5rem;
  max-width: 580px;
  opacity: 0;
  transform: translateY(30px);
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(30px);
}

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-smooth);
  cursor: pointer;
  border: none;
  font-family: var(--font-body);
}

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

.btn-primary:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px -5px rgba(201, 168, 99, 0.3);
}

.btn-outline {
  background: transparent;
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
  border-color: white;
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.btn-cta {
  background: white;
  color: var(--color-primary);
  font-weight: 600;
  padding: 1.125rem 2.5rem;
  font-size: 1.05rem;
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px -10px rgba(0, 0, 0, 0.25);
}

.hero-stat {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  border-left: 1px solid rgba(255, 255, 255, 0.3);
  padding-left: 3rem;
}

.stat-item {
  opacity: 0;
  transform: translateY(30px);
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent-light);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.75);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 4rem;
  background: rgba(255, 255, 255, 0.4);
  margin: 1rem auto 0;
  animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(10px); }
}

/* ============================================
   Reveal Animation
   ============================================ */

.reveal-element {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), 
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ============================================
   Section Base
   ============================================ */

.section {
  padding: var(--spacing-xl) 0;
}

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

.section-label {
  display: inline-block;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
  font-weight: 500;
}

.section-title {
  margin-bottom: 1.5rem;
}

.section-description {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 700px;
  margin-bottom: 4rem;
}

.section-header {
  text-align: left;
}

/* ============================================
   About Section
   ============================================ */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 5rem;
  align-items: center;
}

.about-image .image-frame {
  position: relative;
  padding: 1rem;
  background: white;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
}

.about-image .image-frame::before {
  content: '';
  position: absolute;
  top: 2rem;
  left: -2rem;
  width: 4rem;
  height: 4rem;
  background: var(--color-accent);
  opacity: 0.15;
  z-index: -1;
}

.about-image .image-frame::after {
  content: '';
  position: absolute;
  bottom: 2rem;
  right: -2rem;
  width: 4rem;
  height: 4rem;
  border: 2px solid var(--color-accent);
  opacity: 0.3;
  z-index: -1;
}

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

.image-placeholder {
  width: 100%;
  aspect-ratio: 3/4;
  background: 
    linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  background-image: 
    linear-gradient(135deg, rgba(26, 42, 74, 0.05) 0%, rgba(201, 168, 99, 0.08) 100%),
    linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 0.9rem;
}

.about-text {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
}

.feature-item svg {
  flex-shrink: 0;
  color: var(--color-accent);
}

/* ============================================
   Projects Section
   ============================================ */

.section-header {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.project-card {
  background: white;
  overflow: hidden;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 10px 15px -3px rgba(0, 0, 0, 0.05);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.project-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
}

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

.project-placeholder {
  width: 100%;
  height: 100%;
}

.project-placeholder.project-1 {
  background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
}

.project-placeholder.project-2 {
  background: linear-gradient(135deg, #1a2a4a 0%, #c9a863 100%);
}

.project-placeholder.project-3 {
  background: linear-gradient(135deg, #2d403a 0%, #8f9779 100%);
}

.project-placeholder.project-4 {
  background: linear-gradient(135deg, #3a3a50 0%, #a8a8c9 100%);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 42, 74, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-link {
  padding: 0.75rem 2rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-smooth);
}

.project-link:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.project-info {
  padding: 1.5rem;
}

.project-info h3 {
  margin-bottom: 0.5rem;
}

.project-info p {
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.project-tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.25rem 0.75rem;
  background: rgba(201, 168, 99, 0.15);
  color: var(--color-primary);
  border-radius: 100px;
  font-weight: 500;
}

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

/* ============================================
   Services Section
   ============================================ */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.service-item {
  padding: 2.5rem 2rem;
  background: white;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-smooth);
}

.service-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 15px 35px -10px rgba(201, 168, 99, 0.15);
  transform: translateY(-4px);
}

.service-icon {
  font-size: 2.5rem;
  margin-bottom: 1.25rem;
}

.service-image {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 140px;
  margin-bottom: 1.25rem;
  border-radius: var(--radius-sm);
}

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

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

.service-item h3 {
  margin-bottom: 0.75rem;
}

.service-item p {
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
  position: relative;
  padding: 6rem 0;
  background: 
    linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  background-image: 
    radial-gradient(circle at 0% 0%, rgba(201, 168, 99, 0.15) 0%, transparent 50%),
    linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  overflow: hidden;
}

.cta-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle at 100% 100%, rgba(201, 168, 99, 0.1) 0%, transparent 50%);
}

.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: white;
}

.cta-title {
  color: white;
  margin-bottom: 1.5rem;
}

.cta-text {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 2.5rem;
}

/* ============================================
   Contact Section
   ============================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-text {
  color: var(--color-text-light);
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
}

.contact-details {
  display: grid;
  gap: 1.5rem;
}

.contact-item strong {
  display: block;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.contact-item p {
  color: var(--color-text-light);
  margin-bottom: 0;
}

.contact-form {
  background: white;
  padding: 2.5rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--color-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
  background: var(--color-bg);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(201, 168, 99, 0.1);
}

.form-group textarea {
  resize: vertical;
}

.form-btn {
  width: 100%;
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand h3 {
  color: white;
  margin-bottom: 0.5rem;
  font-size: 1.5rem;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 1rem;
}

.footer-tagline {
  font-family: var(--font-display);
  color: var(--color-accent-light) !important;
  font-style: italic;
}

.footer h4 {
  color: white;
  margin-bottom: 1rem;
  font-size: 1rem;
  font-family: var(--font-body);
  font-weight: 600;
}

.footer ul {
  list-style: none;
}

.footer li {
  margin-bottom: 0.5rem;
}

.footer a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.9rem;
}

.footer-bottom p {
  margin-bottom: 0.5rem;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 968px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 2rem;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    display: none;
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .mobile-toggle {
    display: flex;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .hero-stat {
    grid-template-columns: repeat(3, 1fr);
    border-left: none;
    padding-left: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    padding-top: 2rem;
  }
  
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  
  .about-features {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: 5rem 0;
  }
}

@media (max-width: 640px) {
  .logo-en {
    display: none;
  }
  
  .logo-divider {
    display: none;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
    text-align: center;
  }
  
  .hero-stat {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-form {
    padding: 1.5rem;
  }
}

/* 微信浏览器终极修复：服务区域空白 + 图片显示正常 */
.service-item.reveal-element {
  opacity: 1 !important;
  visibility: visible !important;
  transform: none !important;
  transition: none !important;
  animation: none !important;
}
.service-image {
  position: relative !important;
  width: 100% !important;
  height: 140px !important;
  overflow: hidden !important;
  border-radius: var(--radius-sm) !important;
  background: #f6f6f6 !important;
}
.service-image img {
  position: absolute !important;
  top: 0 !important;
  left: 0 !important;
  width: 100% !important;
  height: 100% !important;
  object-fit: cover !important;
  object-position: center !important;
  display: block !important;
  transform: none !important;
}