/* ============================================
   山禾艺境设计工作室 - 官方网站样式
   Design: Refined Minimalism with Industrial Touches
   ============================================ */

/* CSS Variables */
:root {
  /* Colors */
  --color-bg: #0a0a0b;
  --color-bg-secondary: #121214;
  --color-bg-tertiary: #1a1a1c;
  --color-text: #e8e8e8;
  --color-text-secondary: #a0a0a0;
  --color-text-muted: #6a6a6a;
  --color-accent: #c9a962;
  --color-accent-hover: #d4b878;
  --color-border: #2a2a2c;
  --color-white: #ffffff;
  --color-black: #000000;
  
  /* Typography */
  --font-display: 'Playfair Display', 'Cormorant Garamond', serif;
  --font-body: 'Noto Sans SC', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-2xl: 8rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Effects */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --glow: 0 0 40px rgba(201, 169, 98, 0.15);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Custom Cursor */
.cursor, .cursor-follower {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: transform 0.1s ease;
}

.cursor {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  opacity: 0.8;
}

.cursor-follower {
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-accent);
  opacity: 0.3;
  transition: transform 0.15s ease, width 0.3s ease, height 0.3s ease;
}

a:hover ~ .cursor-follower,
button:hover ~ .cursor-follower,
.cursor-follower.hover {
  width: 60px;
  height: 60px;
  opacity: 0.5;
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-md) 0;
  transition: background var(--transition-base), padding var(--transition-base);
}

.navbar.scrolled {
  background: rgba(10, 10, 11, 0.95);
  backdrop-filter: blur(20px);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--color-white);
}

.logo-cn {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  line-height: 1.2;
}

.logo-en {
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-menu a {
  text-decoration: none;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-menu a:hover {
  color: var(--color-white);
}

.nav-menu a:hover::after {
  width: 100%;
}

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

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

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

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

.gradient-mesh {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 20% 30%, rgba(201, 169, 98, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(201, 169, 98, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(30, 30, 35, 0.5) 0%, transparent 70%);
  filter: blur(60px);
}

.noise-overlay {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--spacing-xl);
}

.hero-tagline {
  font-size: 0.9rem;
  letter-spacing: 0.3em;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 300;
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
  color: var(--color-white);
}

.title-line {
  display: block;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  font-weight: 300;
  margin-bottom: var(--spacing-lg);
  letter-spacing: 0.1em;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--glow);
}

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

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

.btn-full {
  width: 100%;
  justify-content: center;
}

.btn svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

.btn:hover svg {
  transform: translateX(4px);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--color-text-muted), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
  50% { opacity: 0.8; transform: scaleY(1); }
}

/* Section Styles */
section {
  padding: var(--spacing-2xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-tag {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 400;
  color: var(--color-white);
}

/* About Section */
.about {
  background: var(--color-bg-secondary);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.about-text .lead {
  font-size: 1.2rem;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  font-weight: 300;
}

.about-text p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.about-stats {
  display: flex;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 300;
  color: var(--color-accent);
  line-height: 1;
}

.stat-number::after {
  content: '+';
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
  letter-spacing: 0.05em;
}

.about-image {
  position: relative;
}

.image-frame {
  position: relative;
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.image-frame::before {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  bottom: 20px;
  left: -20px;
  border: 1px solid var(--color-border);
  z-index: -1;
}

.placeholder-image {
  aspect-ratio: 4/3;
  background: var(--color-bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 1rem;
  letter-spacing: 0.1em;
}

.about-img,
.project-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow), filter var(--transition-base);
}

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

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

.project-card:hover .project-img {
  transform: scale(1.05);
  filter: brightness(1.1);
}

/* Services Section */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.service-card {
  padding: var(--spacing-lg);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.service-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

.service-icon svg {
  width: 100%;
  height: 100%;
}

.service-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
}

.service-desc {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

.service-list {
  list-style: none;
  padding: 0;
}

.service-list li {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: 0.4rem 0;
  padding-left: 1.2rem;
  position: relative;
}

.service-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* Projects Section */
.projects {
  background: var(--color-bg-secondary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

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

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
}

.project-image {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--color-bg-tertiary);
}

.project-placeholder {
  width: 100%;
  height: 100%;
  background: var(--color-bg-tertiary);
  transition: transform var(--transition-slow);
}

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

.project-info {
  padding: var(--spacing-md);
}

.project-category {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: var(--spacing-xs);
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-white);
  margin-bottom: var(--spacing-xs);
}

.project-desc {
  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: var(--spacing-xl);
}

.contact-lead {
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
  font-weight: 300;
  line-height: 1.8;
}

.contact-details {
  margin-bottom: var(--spacing-lg);
}

.contact-item {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--spacing-md);
}

.contact-label {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.contact-value {
  color: var(--color-text);
  font-size: 1rem;
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
}

.social-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
}

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

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  position: relative;
}

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

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-bg-tertiary);
}

.form-group label {
  position: absolute;
  left: 1rem;
  top: 1rem;
  color: var(--color-text-muted);
  font-size: 1rem;
  pointer-events: none;
  transition: all var(--transition-fast);
  background: transparent;
  padding: 0 0.25rem;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: -0.6rem;
  left: 0.75rem;
  font-size: 0.75rem;
  color: var(--color-accent);
  background: var(--color-bg-secondary);
}

.contact-value a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.contact-value a:hover {
  color: var(--color-accent);
}

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

.form-note {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-top: 1rem;
}

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

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-brand {
  display: flex;
  flex-direction: column;
}

.footer-logo-cn {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-white);
  letter-spacing: 0.1em;
}

.footer-logo-en {
  font-size: 0.6rem;
  color: var(--color-text-muted);
  letter-spacing: 0.3em;
  margin-top: 0.25rem;
}

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

/* Animations */
.fade-in-up,
.fade-in-left,
.fade-in-right {
  opacity: 0;
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-up {
  transform: translateY(40px);
}

.fade-in-left {
  transform: translateX(-40px);
}

.fade-in-right {
  transform: translateX(40px);
}

.fade-in-up.visible,
.fade-in-left.visible,
.fade-in-right.visible {
  opacity: 1;
  transform: translate(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* Responsive */
@media (max-width: 1024px) {
  .services-grid,
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .about-image {
    order: -1;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background: var(--color-bg-secondary);
    flex-direction: column;
    padding: var(--spacing-xl) var(--spacing-md);
    gap: var(--spacing-md);
    transition: right var(--transition-base);
    border-left: 1px solid var(--color-border);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-toggle {
    display: flex;
    z-index: 1001;
  }
  
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .services-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .about-stats {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  
  .cursor, .cursor-follower {
    display: none;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
}