/* 雲上美術館 - 莫蘭迪暖色風格 */
/* Design: 低飽和度灰調、溫暖優雅、內斂高級 */

/* === Variables === */
:root {
  /* Colors - 莫蘭迪暖色配色 */
  --color-ink: #5a5045;           /* 灰墨色 */
  --color-ink-light: #7a6b5a;     /* 灰棕浅 */
  --color-ink-lighter: #9a8b7a;   /* 灰棕更浅 */
  --color-brown: #a08b70;         /* 灰棕暖 - 主色调 */
  --color-brown-light: #c4b59a;   /* 灰米黄浅 */
  --color-seal: #c4a5a0;          /* 灰粉红 - 印章色 */
  --color-gold: #d0c0a0;          /* 灰暖金 */
  --color-paper: #f5f0e8;         /* 灰白纸张 */
  --color-paper-bg: #f0ebe3;      /* 灰白背景 */
  --color-paper-dark: #e5e0d8;    /* 灰白深 */
  --color-border: #d0c5b8;        /* 灰调边框 */
  --color-white: #ffffff;
  
  /* Typography */
  --font-zh: 'Noto Serif TC', 'STKaiti', 'KaiTi', 'SimSun', serif;
  --font-en: 'Cormorant Garamond', 'Georgia', 'Times New Roman', serif;
  
  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 80px;
  
  /* Layout */
  --header-height: 60px;
  --container-width: 1200px;
  --container-padding: 20px;
}

/* === Fonts === */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+TC:wght@400;500;600;700&family=Cormorant+Garamond:wght@400;500;600&display=swap');

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

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

body {
  font-family: var(--font-zh);
  background-color: var(--color-paper-bg);
  color: var(--color-ink);
  line-height: 1.8;
  min-height: 100vh;
  position: relative;
}

/* 水墨背景裝飾 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  right: 0;
  width: 35%;
  height: 100%;
  background: 
    radial-gradient(ellipse at 80% 30%, rgba(61, 61, 61, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 90% 70%, rgba(93, 78, 55, 0.06) 0%, transparent 40%),
    radial-gradient(ellipse at 70% 90%, rgba(139, 115, 85, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.5;
  font-family: var(--font-zh);
}

.zh {
  display: block;
  font-family: var(--font-zh);
}

.en {
  display: block;
  font-family: var(--font-en);
  font-size: 0.85em;
  color: var(--color-ink-lighter);
  margin-top: 4px;
}

/* === Layout === */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  position: relative;
  z-index: 1;
}

/* === Header === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background 0.3s;
}

.header-inner {
  max-width: var(--container-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo img,
.header-logo {
  height: 40px;
  width: auto;
  object-fit: contain;
}

.logo-text {
  font-family: var(--font-zh);
  font-size: 18px;
  color: var(--color-brown);
  letter-spacing: 2px;
}

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

.nav-item {
  text-decoration: none;
  color: var(--color-ink);
  font-size: 14px;
  padding: 8px 12px;
  position: relative;
  transition: color 0.3s;
}

.nav-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-seal);
  transition: width 0.3s, left 0.3s;
}

.nav-item:hover::after,
.nav-item.active::after {
  width: 100%;
  left: 0;
}

.nav-item:hover {
  color: var(--color-brown);
}

.nav-item .zh {
  font-size: 14px;
}

.nav-item .en {
  font-size: 11px;
}

/* Mobile Menu Toggle */
.menu-toggle {
  width: 30px;
  height: 30px;
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
}

.menu-icon,
.menu-icon::before,
.menu-icon::after {
  position: absolute;
  width: 20px;
  height: 2px;
  background: var(--color-brown);
  left: 5px;
  transition: transform 0.3s;
}

.menu-icon {
  top: 14px;
}

.menu-icon::before {
  content: '';
  top: -6px;
}

.menu-icon::after {
  content: '';
  top: 6px;
}

/* Header Right & Dropdown */
.header-right {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  min-width: 140px;
  z-index: 1001;
}

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

.dropdown-item {
  display: block;
  padding: 12px 20px;
  text-decoration: none;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.2s;
}

.dropdown-item:last-child {
  border-bottom: none;
}

.dropdown-item:hover {
  background: var(--color-paper-bg);
}

.dropdown-item .zh {
  font-size: 14px;
  letter-spacing: 1px;
  display: block;
}

.dropdown-item .en {
  font-size: 11px;
  color: var(--color-ink-lighter);
  margin-top: 2px;
  display: block;
}

.dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: 4px 0;
}

/* Share Toast */
.share-toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  padding: 16px 24px;
  border-radius: 8px;
  font-size: 14px;
  letter-spacing: 1px;
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  white-space: pre-line;
  max-width: 300px;
  text-align: center;
  line-height: 1.6;
}

.share-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Footer Modal */
.footer-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  opacity: 0;
  transition: opacity 0.3s;
}

.footer-modal.active {
  opacity: 1;
}

.footer-modal-content {
  background: #fff;
  border-radius: 12px;
  max-width: 400px;
  width: 90%;
  max-height: 80vh;
  overflow: hidden;
  transform: scale(0.9);
  transition: transform 0.3s;
}

.footer-modal.active .footer-modal-content {
  transform: scale(1);
}

.footer-modal-large {
  max-width: 600px;
  height: 70vh;
  display: flex;
  flex-direction: column;
}

.footer-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid #e5e0d8;
  background: #faf8f5;
}

.footer-modal-header h3 {
  margin: 0;
  font-size: 18px;
  font-family: 'STKaiti', 'KaiTi', serif;
  color: #a08b70;
  letter-spacing: 2px;
}

.footer-modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  font-size: 24px;
  color: #c4b59a;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s;
}

.footer-modal-close:hover {
  background: #e5e0d8;
  color: #a08b70;
}

.footer-modal-body {
  padding: 24px;
  line-height: 1.8;
  color: #a08b70;
  overflow-y: auto;
}

.footer-modal-body p {
  margin: 0;
  white-space: pre-line;
}

.footer-modal-iframe {
  padding: 0;
  flex: 1;
}

.footer-modal-iframe iframe {
  width: 100%;
  height: 100%;
}

@media (max-width: 480px) {
  .footer-modal-content {
    width: 95%;
    margin: 20px;
  }
  
  .footer-modal-large {
    width: 95%;
    height: 85vh;
  }
}

/* Mobile styles */
@media (max-width: 768px) {
  .nav {
    display: none;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .dropdown-menu {
    position: fixed;
    top: 60px;
    bottom: auto;
    left: auto;
    right: 10px;
    margin-top: 0;
    border-radius: 8px;
    transform: translateY(-10px);
    max-height: none;
  }
  
  .dropdown-menu.active {
    transform: translateY(0);
  }
  
  .dropdown-item {
    padding: 14px 24px;
  }
}

/* === Hero === */
.hero {
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  padding: var(--header-height) var(--container-padding) var(--spacing-xl);
  background: transparent;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.hero-content {
  max-width: var(--container-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.hero-text {
  flex: 1;
  max-width: 500px;
}

.hero-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-brown);
  letter-spacing: 4px;
}

.hero-title .zh {
  font-weight: 600;
}

.hero-title .en {
  font-size: 1.5rem;
  font-style: italic;
  color: var(--color-ink-lighter);
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-ink-light);
  border-left: 3px solid var(--color-seal);
  padding-left: 16px;
}

.hero-subtitle .zh {
  letter-spacing: 2px;
}

.hero-desc {
  font-size: 1rem;
  line-height: 2;
  color: var(--color-ink);
}

.hero-desc .en {
  line-height: 1.8;
}

/* 印章裝飾 */
.hero-seal {
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translateY(-50%);
  width: 80px;
  height: 80px;
  opacity: 0.12;
}

.hero-seal::before {
  content: '雲';
  display: block;
  width: 100%;
  height: 100%;
  background: var(--color-seal);
  color: var(--color-paper);
  font-size: 48px;
  font-weight: bold;
  text-align: center;
  line-height: 80px;
  border-radius: 4px;
  font-family: 'SimSun', 'STSong', serif;
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

/* Logo Animation */
.logo-animation {
  position: relative;
  width: 280px;
  height: 280px;
  max-width: 90vw;
  max-height: 90vw;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-logo-video {
  width: 98%;
  height: 98%;
  max-width: 280px;
  max-height: 280px;
  object-fit: contain;
  border-radius: 8px;
  position: relative;
  z-index: 10;
}

.logo-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, 
    rgba(93, 78, 55, 0.08) 0%,
    transparent 70%);
  animation: glow-pulse 4s ease-in-out infinite;
  z-index: 5;
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.1); }
}

/* === Sections === */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-title {
  font-size: 1.5rem;
  color: var(--color-brown);
  letter-spacing: 2px;
}

.section-title .zh {
  font-weight: 600;
}

.section-line {
  width: 60px;
  height: 2px;
  background: linear-gradient(to right, transparent, var(--color-seal), transparent);
  margin: var(--spacing-sm) auto 0;
}

/* === Featured Exhibitions === */
.featured-exhibitions {
  padding: var(--spacing-xl) var(--container-padding);
  background: var(--color-paper);
  position: relative;
  z-index: 1;
}

.exhibition-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.exhibition-card {
  display: block;
  border-radius: 4px;
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  transition: transform 0.3s, box-shadow 0.3s;
  text-decoration: none;
  position: relative;
}

.exhibition-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(93, 78, 55, 0.12);
  border-color: var(--color-brown-light);
}

.exhibition-card::after {
  content: '展';
  position: absolute;
  right: 12px;
  bottom: 12px;
  width: 32px;
  height: 32px;
  background: var(--color-seal);
  color: var(--color-paper);
  font-size: 18px;
  font-weight: bold;
  text-align: center;
  line-height: 32px;
  border-radius: 3px;
  opacity: 0.15;
  font-family: 'SimSun', 'STSong', serif;
  pointer-events: none;
}

.card-image {
  aspect-ratio: 16/10;
  overflow: hidden;
  position: relative;
  background: var(--color-paper-bg);
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  transition: transform 0.5s;
}

.exhibition-card:hover .card-image img {
  transform: scale(1.03);
}

.card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(61, 61, 61, 0.4) 0%, transparent 50%);
}

.card-content {
  padding: var(--spacing-sm);
  background: var(--color-paper);
}

.card-title {
  font-size: 1.1rem;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.card-title .zh {
  font-weight: 600;
  letter-spacing: 1px;
}

.card-date {
  font-size: 0.85rem;
  color: var(--color-ink-lighter);
}

/* === Featured Artworks === */
.featured-artworks {
  padding: var(--spacing-xl) var(--container-padding);
  background: transparent;
  position: relative;
  z-index: 1;
}

.artwork-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.artwork-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
}

.artwork-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(93, 78, 55, 0.1);
  border-color: var(--color-brown-light);
}

/* 印章裝飾 */
.artwork-card::before {
  content: '藏';
  position: absolute;
  right: 8px;
  bottom: 8px;
  width: 28px;
  height: 28px;
  background: var(--color-seal);
  color: var(--color-paper);
  font-size: 16px;
  font-weight: bold;
  text-align: center;
  line-height: 28px;
  border-radius: 3px;
  opacity: 0.12;
  font-family: 'SimSun', 'STSong', serif;
  pointer-events: none;
  z-index: 1;
}

.artwork-image {
  width: 100%;
  padding-bottom: 100%;
  position: relative;
  overflow: hidden;
  background: var(--color-paper-bg);
}

.artwork-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.artwork-info {
  padding: var(--spacing-sm);
  background: var(--color-paper);
}

.artwork-title {
  font-size: 1rem;
  margin-bottom: 4px;
}

.artwork-title .zh {
  font-weight: 500;
  letter-spacing: 1px;
}

.artwork-author {
  font-size: 0.85rem;
  color: var(--color-ink-lighter);
}

/* View All Button */
.view-all-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: var(--spacing-lg) auto 0;
  padding: 14px 28px;
  background: var(--color-brown);
  color: var(--color-paper);
  text-decoration: none;
  border-radius: 4px;
  font-size: 16px;
  font-family: var(--font-zh);
  letter-spacing: 2px;
  transition: background 0.3s, box-shadow 0.3s;
  max-width: 300px;
  border: none;
}

.view-all-btn:hover {
  background: var(--color-brown-light);
  box-shadow: 0 4px 16px rgba(93, 78, 55, 0.2);
}

.view-all-btn .arrow {
  transition: transform 0.3s;
}

.view-all-btn:hover .arrow {
  transform: translateX(4px);
}

/* === Footer === */
.footer {
  background: var(--color-brown);
  color: var(--color-paper);
  padding: var(--spacing-xl) var(--container-padding) var(--spacing-md);
  position: relative;
  z-index: 1;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(to bottom, var(--color-paper-bg), transparent);
  opacity: 0.3;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: var(--spacing-lg);
  align-items: start;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-logo {
  height: 60px;
  width: auto;
  object-fit: contain;
  margin-bottom: 16px;
}

.footer-quote {
  font-size: 1rem;
  color: var(--color-paper-dark);
  letter-spacing: 2px;
}

.footer-quote .zh {
  font-style: italic;
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-title {
  font-size: 0.9rem;
  margin-bottom: 8px;
  color: var(--color-paper);
}

.footer-title .zh {
  font-weight: 500;
}

.footer-title .en {
  font-size: 0.8em;
}

.footer-column a {
  color: var(--color-paper-dark);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.3s;
}

.footer-column a:hover {
  color: var(--color-seal);
}

.footer-social {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.social-link {
  width: 36px;
  height: 36px;
  color: var(--color-paper);
  transition: color 0.3s;
}

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

.footer-bottom {
  max-width: var(--container-width);
  margin: var(--spacing-lg) auto 0;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(249, 244, 237, 0.2);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-paper-dark);
}

/* === 頁面分隔線 === */
.page-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-border), transparent);
  margin: var(--spacing-lg) 0;
}

/* === Responsive === */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 32px;
    --spacing-xl: 48px;
  }
  
  body::before {
    width: 50%;
  }
  
  /* Header */
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-paper);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: 0;
    transform: translateY(-100%);
    opacity: 0;
    transition: transform 0.3s, opacity 0.3s;
    z-index: 999;
    border-bottom: 1px solid var(--color-border);
  }
  
  .nav.active {
    transform: translateY(0);
    opacity: 1;
  }
  
  .nav-item {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
  }
  
  .menu-toggle {
    display: block;
  }
  
  /* Hero */
  .hero-content {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-text {
    max-width: 100%;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    border-left: none;
    border-top: 3px solid var(--color-seal);
    padding-left: 0;
    padding-top: 12px;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .logo-animation {
    width: 220px;
    height: 220px;
    max-width: 85vw;
    max-height: 85vw;
  }
  
  .hero-logo-video {
    width: 98%;
    height: 98%;
    max-width: 220px;
    max-height: 220px;
  }
  
  .hero-seal {
    display: none;
  }
  
  /* Exhibition Grid */
  .exhibition-grid {
    grid-template-columns: 1fr;
  }
  
  /* Artwork Grid */
  .artwork-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }
  
  /* Footer */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  .footer-links {
    justify-content: center;
  }
  
  .footer-social {
    flex-direction: row;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .artwork-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: 1.5rem;
  }
  
  .hero-title .en {
    font-size: 1rem;
  }
  
  .view-all-btn {
    width: 100%;
    max-width: 100%;
  }
}
/* 图片占位背景 - 无图片时显示 */
.image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #e8e3d8 0%, #d5d0c5 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: 0;
  left: 0;
}

.card-image .image-placeholder::before,
.artwork-image .image-placeholder::before {
  content: "縱浪";
  font-family: "STKaiti", "KaiTi", serif;
  font-size: 24px;
  color: #a08b70;
  opacity: 0.5;
  letter-spacing: 4px;
}

/* 藏品详情页大图占位 */
.image-placeholder-full {
  width: 100%;
  height: 100%;
  min-height: 400px;
  background: linear-gradient(135deg, #e8e3d8 0%, #d5d0c5 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-placeholder-full::before {
  content: "縱浪";
  font-family: "STKaiti", "KaiTi", serif;
  font-size: 48px;
  color: #a08b70;
  opacity: 0.4;
  letter-spacing: 8px;
}