/* @import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400..900;1,400..900&family=Inter:wght@300;400;500;600;700&family=Noto+Serif+SC:wght@300;400;600;700&display=swap');

:root {
  /* Color Palette */
  --bg-primary: #FAF9F6;
  --bg-secondary: #FFFFFF;
  --text-primary: #1A1A1A;
  --text-secondary: #666666;
  --accent: #B89770; /* Art Gallery Gold */
  --accent-hover: #9A7E5C;
  --accent-light: #F4EFEA;
  --border-color: rgba(0, 0, 0, 0.06);
  --glass-bg: rgba(250, 249, 246, 0.8);
  --glass-border: rgba(255, 255, 255, 0.5);
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
  
  /* Transitions */
  --transition-smooth: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  --transition-fast: all 0.2s ease;
  
  /* Layout */
  --max-width: 1200px;
  --header-height: 80px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

/* Base Layout Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography styles */
h1, h2, h3, h4, .serif-font {
  font-family: 'Playfair Display', 'Noto Serif SC', Georgia, serif;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.section-title-wrapper {
  text-align: center;
  margin-bottom: 60px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s cubic-bezier(0.25, 1, 0.5, 1) forwards;
  animation-delay: 0.2s;
}

.section-subtitle {
  color: var(--accent);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  font-weight: 600;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: 2.5rem;
  color: var(--text-primary);
  position: relative;
  display: inline-block;
  padding-bottom: 16px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background-color: var(--accent);
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: var(--transition-smooth);
}

.header.scrolled {
  height: 70px;
  background-color: rgba(250, 249, 246, 0.95);
  box-shadow: var(--shadow-sm);
}

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

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

.logo-img {
  height: 48px;
  width: 48px;
  object-fit: contain;
  transition: var(--transition-smooth);
}

.logo-text {
  font-family: 'Playfair Display', 'Noto Serif SC', serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

.logo-text span {
  color: var(--accent);
}

.nav-menu {
  display: flex;
  gap: 40px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  position: relative;
  padding: 8px 0;
}

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

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

.nav-link.active {
  color: var(--accent);
  font-weight: 600;
}

.hamburger {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--text-primary);
  margin: 5px 0;
  transition: var(--transition-smooth);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 0;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}

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

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

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--text-primary);
}

.btn-outline:hover {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  transform: translateY(-2px);
}

.btn-accent {
  background-color: var(--accent);
  color: #FFFFFF;
}

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

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  min-height: 650px;
  display: flex;
  align-items: center;
  background-color: #0c0c0c;
  color: #FFFFFF;
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero-bg-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
  transform: scale(1.05);
  animation: zoomBg 20s infinite alternate;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(0, 0, 0, 0.2) 0%, rgba(0, 0, 0, 0.75) 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 700px;
  opacity: 0;
  transform: translateY(40px);
  animation: fadeInUp 1.2s cubic-bezier(0.25, 1, 0.5, 1) forwards;
  animation-delay: 0.3s;
}

.hero-tag {
  color: var(--accent);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  font-weight: 600;
  margin-bottom: 20px;
  display: block;
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.25;
  margin-bottom: 24px;
  font-weight: 500;
}

.hero-title span {
  font-weight: 700;
  color: var(--accent);
}

.hero-desc {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 40px;
  max-width: 600px;
  font-weight: 300;
}

.hero-btn-group {
  display: flex;
  gap: 20px;
}

/* Feature Section */
.section-padding {
  padding: 100px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 48px 32px;
  transition: var(--transition-smooth);
  opacity: 0;
  transform: translateY(30px);
}

.feature-card.animate {
  opacity: 1;
  transform: translateY(0);
}

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

.feature-icon-wrapper {
  color: var(--accent);
  margin-bottom: 28px;
  display: inline-flex;
}

.feature-icon-wrapper svg {
  width: 40px;
  height: 40px;
  stroke-width: 1.2;
}

.feature-title {
  font-size: 1.4rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Exhibition Display (Highlight Section) */
.exhibitions-section {
  background-color: var(--bg-secondary);
}

.grid-layout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.card-item {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition-smooth);
  opacity: 0;
  transform: translateY(40px);
}

.card-item.animate {
  opacity: 1;
  transform: translateY(0);
}

.card-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.card-img-wrapper {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
}

.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

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

.card-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background-color: var(--accent);
  color: #FFFFFF;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  z-index: 10;
}

.card-body {
  padding: 24px;
}

.card-date {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 10px;
  display: block;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-link {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.card-link svg {
  transition: var(--transition-fast);
}

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

.card-link:hover svg {
  transform: translateX(4px);
}

/* Showcase Banner - Call to Action style */
.showcase-banner {
  background-color: #121212;
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
}

.showcase-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 80% 50%, rgba(184, 151, 112, 0.15) 0%, rgba(0, 0, 0, 0) 60%);
  z-index: 1;
}

.showcase-container {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}

.showcase-text {
  max-width: 600px;
}

.showcase-tag {
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 16px;
  display: block;
}

.showcase-title {
  font-size: 2.2rem;
  line-height: 1.3;
  margin-bottom: 24px;
}

.showcase-desc {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.05rem;
  font-weight: 300;
  margin-bottom: 36px;
}

/* About Page Styles */
.about-hero {
  height: 50vh;
  min-height: 400px;
}

.about-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-intro-image-wrapper {
  position: relative;
  border: 1px solid var(--border-color);
  padding: 16px;
  background-color: var(--bg-secondary);
}

.about-intro-image-wrapper::before {
  content: '';
  position: absolute;
  top: -12px;
  left: -12px;
  width: 60px;
  height: 60px;
  border-top: 2px solid var(--accent);
  border-left: 2px solid var(--accent);
  z-index: 1;
}

.about-intro-image-wrapper::after {
  content: '';
  position: absolute;
  bottom: -12px;
  right: -12px;
  width: 60px;
  height: 60px;
  border-bottom: 2px solid var(--accent);
  border-right: 2px solid var(--accent);
  z-index: 1;
}

.about-intro-content h3 {
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.about-intro-content p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-size: 1.05rem;
}

/* Philosophy / Stats section */
.philosophy-section {
  background-color: var(--accent-light);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.philosophy-item {
  text-align: center;
  padding: 20px;
}

.philosophy-num {
  font-size: 3.5rem;
  font-family: 'Playfair Display', serif;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 12px;
}

.philosophy-title {
  font-size: 1.2rem;
  margin-bottom: 12px;
  color: var(--text-primary);
}

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

/* Exhibitions Directory Grid & Filters */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  background: none;
  border: 1px solid var(--border-color);
  padding: 10px 24px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

/* Contact Page Styles */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

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

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

.contact-item-icon {
  color: var(--accent);
}

.contact-item-icon svg {
  width: 24px;
  height: 24px;
  stroke-width: 1.5;
}

.contact-item-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.contact-item-value {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Mock Map Container */
.mock-map {
  width: 100%;
  height: 250px;
  background-color: #E2DFD8;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.mock-map-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.2;
  background-image: 
    radial-gradient(#1A1A1A 1px, transparent 1px),
    radial-gradient(#1A1A1A 1px, transparent 1px);
  background-size: 20px 20px;
  background-position: 0 0, 10px 10px;
}

.mock-map-pin {
  position: relative;
  z-index: 2;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.mock-map-pin svg {
  width: 40px;
  height: 40px;
  color: var(--accent);
  animation: bounce 2s infinite;
}

.mock-map-label {
  background-color: var(--text-primary);
  color: #FFFFFF;
  padding: 6px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  margin-top: 8px;
  box-shadow: var(--shadow-sm);
}

/* Contact Form */
.contact-form-panel {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 48px;
  box-shadow: var(--shadow-sm);
}

.form-group-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 14px 18px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  background-color: #FFFFFF;
}

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

.submit-message {
  display: none;
  margin-top: 16px;
  padding: 12px;
  border-radius: 4px;
  font-size: 0.9rem;
  text-align: center;
}

.submit-message.success {
  display: block;
  background-color: #E6F4EA;
  color: #137333;
  border: 1px solid #CEEAD6;
}

/* Footer Section & ICP备案 info */
.footer {
  background-color: #121212;
  color: #FFFFFF;
  padding: 80px 0 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.footer-logo-img {
  height: 40px;
  width: 40px;
  filter: invert(1);
}

.footer-logo-text {
  font-family: 'Playfair Display', serif;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.footer-logo-text span {
  color: var(--accent);
}

.footer-desc {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  max-width: 300px;
}

.footer-title {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
  color: #FFFFFF;
}

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

.footer-link {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer-copyright {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.45);
}

.footer-icp {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(255, 255, 255, 0.03);
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition-smooth);
}

.footer-icp:hover {
  border-color: var(--accent);
  background-color: rgba(184, 151, 112, 0.08);
  color: var(--accent);
}

.footer-icp-icon {
  width: 14px;
  height: 14px;
  opacity: 0.7;
}

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

@keyframes zoomBg {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.08);
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

/* Responsive Styles */
@media (max-width: 992px) {
  .features-grid,
  .grid-layout,
  .philosophy-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .about-intro-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .hero-title {
    font-size: 2.8rem;
  }
  
  .showcase-container {
    flex-direction: column;
    text-align: center;
    gap: 40px;
  }
  
  .showcase-text {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }
  
  .hamburger {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--bg-primary);
    flex-direction: column;
    align-items: center;
    padding: 60px 0;
    gap: 30px;
    transition: var(--transition-smooth);
    border-top: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  
  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .hero-desc {
    font-size: 0.95rem;
  }
  
  .features-grid,
  .grid-layout,
  .philosophy-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .form-group-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
  
  .contact-form-panel {
    padding: 28px;
  }
  
  .section-title {
    font-size: 2rem;
  }
}