/* ==========================================================================
   1. 基礎設定 (Global & Base)
   ========================================================================== */
html, body {
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-TimesNewRoman), serif;
  line-height: 1.5;
  padding-top: 80px; /* 補償固定導覽列高度 */
  overflow-x: hidden; /* 防止水平滾動 */
}

/* 頁面載入動畫狀態 */
body.page-loading {
  overflow: hidden;
}

body.page-loaded {
  overflow-x: hidden;
}

/* 所有連結的基礎過渡效果 */
a {
  transition: color 0.3s ease, opacity 0.3s ease;
}

.container {
  width: min(100% - 3rem, var(--container));
  margin-inline: auto;
}

img {
  /* 禁止選取與拖拽圖片 */
  -webkit-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-user-drag: none;
  pointer-events: none; /* 物理層面防止點擊 */
}

/* ==========================================================================
   2. 佈局結構 (Layout & Sections)
   ========================================================================== */
.section {
  padding: var(--space-7) 0;
  border-bottom: 1px solid var(--color-border);
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.two-col {
  display: grid;
  gap: var(--space-7);
  align-items: start;
}

/* ==========================================================================
   3. 導覽列 (Site Header & Navigation)
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

/* 滾動時的導覽列樣式 */
.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.header-inner .logo {
  font-weight: 800;
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  transition: transform 0.3s ease;
}

.header-inner .logo:hover {
  transform: scale(1.05);
}

.site-nav ul {
  display: flex;
  gap: var(--space-6);
}

.site-nav a {
  text-transform: uppercase;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  transition: color 0.3s ease, transform 0.3s ease;
  position: relative;
  display: inline-block;
}

/* 導覽連結底線動畫 */
.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ==========================================================================
   4. 英雄區塊 (Hero Section)
   ========================================================================== */
.hero {
  padding: calc(var(--space-8) * 2.5) 0;
  min-height: 90vh;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
  background: #111; /* fallback */
}

.hero-bg-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  pointer-events: none;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.28); /* 讓文字更清楚 */
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-5);
  white-space: nowrap; /* 強制不換行 */
  width: 100%;
  color: white;
  -webkit-text-stroke: 0.25px black;
}

.hero .subtitle {
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  color: white;
  -webkit-text-stroke: 0.25px black;
}

.hero .lede {
  max-width: 90ch;
  font-size: 1.25rem;
  color: var(--color-muted);
  color: white;
  -webkit-text-stroke: 0.25px black;
}

/* ==========================================================================
   5. 通用元件 (Buttons, Cards, Forms)
   ========================================================================== */

/* 按鈕樣式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  text-transform: uppercase;
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

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

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

/* 1. 基礎網格設定 */
.grid {
  display: grid;
  gap: 20px;
  background: transparent;
}

.cards {
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  padding: 20px;
  transition: all 0.3s ease;
}

/* 2. 基礎卡片樣式 - 全新 Hover Overlay 設計 */
.card {
  background: var(--color-bg);
  padding: 0; /* 移除 padding，讓圖片填滿 */
  display: flex;
  flex-direction: column;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  z-index: 1;
  border: 1px solid var(--color-border);
  overflow: hidden; /* 隱藏溢出內容 */
}

/* 3. 當滑鼠進入 .cards 區域時，所有卡片先呈現「半色調/淡化」 */
.cards:hover .card {
  opacity: 0.5;
  filter: grayscale(80%) blur(1px);
  transform: scale(0.95);
}

/* 4. 當滑鼠正對準特定的 .card 時，該卡片「放大彈出」並恢復正常顏色 */
.cards .card:hover {
  opacity: 1;
  filter: grayscale(0%) blur(0px);
  transform: scale(1.08) translateY(-10px);
  z-index: 10;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

/* 圖片樣式 */
.card-media {
  aspect-ratio: 1/1;
  object-fit: cover;
  filter: grayscale(100%);
  transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  margin-bottom: 0;
  pointer-events: none;
  width: 100%;
}

.card:hover .card-media {
  filter: grayscale(0%);
  transform: scale(1.05);
}

/* 卡片連結樣式 */
.card-link {
  display: block;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* ===== 新增：卡片內容 Overlay 效果 ===== */
.card-body {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-5);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.95) 0%, rgba(0, 0, 0, 0.7) 60%, transparent 100%);
  transform: translateY(100%);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  opacity: 0;
}

.card-body h3 {
  color: #fff;
  margin-bottom: var(--space-2);
  transform: translateY(20px);
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.1s;
}

.card-body h3 a {
  color: #fff;
  text-decoration: none;
  transition: color 0.3s ease;
}

.card-body h3 a:hover {
  color: var(--color-accent);
}

.card-body p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9rem;
  line-height: 1.6;
  transform: translateY(20px);
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.15s;
  margin-bottom: 0;
}

/* Hover 時顯示 Overlay */
.card:hover .card-body {
  transform: translateY(0);
  opacity: 1;
}

.card:hover .card-body h3,
.card:hover .card-body p {
  transform: translateY(0);
}

/* 卡片操作按鈕 */
.card-actions {
  margin-top: var(--space-4);
  transform: translateY(20px);
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s;
}

.card:hover .card-actions {
  transform: translateY(0);
}

.card-actions .btn {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}

.card-actions .btn:hover {
  background: #fff;
  color: #000;
  border-color: #fff;
}

/* 表單樣式 */
.form-field {
  margin-bottom: var(--space-5);
  display: flex;
  flex-direction: column;
}

.form-field label {
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
  letter-spacing: 0.1em;
}

.form-field input,
.form-field textarea {
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  font-family: inherit;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: 1px solid var(--color-accent);
  border-color: var(--color-accent);
}

.field-error {
  color: #ff0000;
  font-size: 0.75rem;
  margin-top: var(--space-1);
}

/* ==========================================================================
   6. 專屬分頁樣式 (Contact & PDF Viewer)
   ========================================================================== */

/* 聯繫頁面 */
.two-col.contact {
  grid-template-columns: 2fr 1fr;
}

.social-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.social-list a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 600;
  transition: color 0.2s ease;
}

.social-list a:hover {
  color: var(--color-accent);
}

/* PDF Modal 與 Viewer */
.pdf-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-overlay {
  position: absolute;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
}

.modal-content {
  position: relative;
  background: var(--color-bg);
  width: 90%;
  max-width: 1000px;
  height: 85vh;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  z-index: 2001;
}

.close-modal {
  position: absolute;
  top: -40px;
  right: 0;
  font-size: 2rem;
  color: white;
  background: none;
  border: none;
  cursor: pointer;
}

#pdf-main-container {
  flex: 1;
  overflow-y: auto;
  text-align: center;
  padding: var(--space-4);
  background: #222;
}

.pdf-frame {
  position: relative;
  overflow: hidden;
  user-select: none;
}

#pdf-canvas {
  max-width: 100%;
  height: auto;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.pdf-controls {
  padding: var(--space-3);
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  font-family: var(--font-mono);
  font-weight: bold;
}
/* ==========================================================================
   專案詳情頁面 - 圖片與文字對齊設定
   ========================================================================== */

/* 1. 建立一個限制寬度的包裝容器 */
.detail-media-group {
  display: flex;
  flex-direction: column;
  width: fit-content;    /* 關鍵：讓容器寬度由內容（圖片）決定 */
  height: fit-content;   /* 高度同理 */
  max-width: 100%;       /* 防止超出螢幕邊界 */
  margin: 0 auto var(--space-6); /* 居中並增加底部間距 */
}

/* 2. 圖片設定 */
.detail-image {
  display: block;
  width: 100%;           /* 填滿父容器 */
  height: 100%;          /* 維持原始比例，不強制 1:1 */
  pointer-events: auto;  /* 覆蓋 global 的 none，讓詳情頁圖片可互動 */
}

/* 3. 文字描述設定 */
.detail-description {
  width: 100%;           /* 強制與父容器（圖片寬度）一致 */
  padding-top: var(--space-3); /* 圖片與文字間的微小間距 */
  text-align: justify;   /* 讓文字兩端對齊，視覺上邊界更整齊 */
  color: var(--color-muted); /* 使用 variables.css 定義的顏色 */
}

/* 如果你的圖片有固定最大寬度（例如 800px），可以加在容器上 */
@media (min-width: 768px) {
  .detail-media-group {
    max-width: 800px; 
  }
}
/* ==========================================================================
   7. 滾動動畫效果 (Scroll Animations)
   ========================================================================== */

/* 淡入動畫基礎類別 */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 左側滑入 */
.slide-in-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* 右側滑入 */
.slide-in-right {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* 縮放淡入 */
.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* 交錯動畫延遲 - 用於列表項目 */
.stagger-item {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.stagger-item.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 平滑滾動 */
html {
  scroll-behavior: smooth;
}

/* 頁面標題動畫 */
.section h1,
.section h2 {
  position: relative;
  overflow: hidden;
}

.section h1::after,
.section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.3s;
}

.section h1.visible::after,
.section h2.visible::after {
  width: 60px;
}

/* ==========================================================================
   8. 安全防護與列印設定
   ========================================================================== */
@media print {
  body {
    display: none !important;
  }
}

/* ==========================================================================
   9. 響應式調整 (Responsive)
   ========================================================================== */

/* 卡片在手機版的特殊處理 - 預設顯示標題 */
@media (max-width: 768px) {
  .card-body {
    transform: translateY(0);
    opacity: 1;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, transparent 100%);
    padding: var(--space-4);
  }
  
  .card-body h3,
  .card-body p {
    transform: translateY(0);
  }
  
  .card-body p {
    display: none; /* 手機版隱藏描述，只顯示標題 */
  }
  
  .card:hover .card-body p {
    display: block;
  }
}
@media (max-width: 768px) {
  .hero h1 {
    font-size: 3.5rem;
    white-space: normal; /* 手機版允許換行以防溢出 */
  }

  .two-col.contact {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .cards {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   9. Carousel/Slider Styles (Project Detail)
   ========================================================================== */

.carousel-container {
  position: relative;
  height: 70vh;
  background: #111;
  overflow: hidden;
  margin-bottom: var(--space-6);
  border-radius: 4px;
}

.carousel-track {
  display: flex;
  transition: transform 0.3s ease;
  height: 100%;
}

.carousel-slide {
  min-width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.carousel-slide img {
  object-fit: contain;
  max-width: 100%;
  max-height: 100%;
  pointer-events: auto;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.7);
  color: white;
  border: none;
  padding: 1rem 1.5rem;
  font-size: 1.5rem;
  cursor: pointer;
  transition: background 0.3s ease;
  z-index: 10;
  border-radius: 4px;
}

.carousel-btn:hover {
  background: rgba(0, 0, 0, 0.9);
}

.carousel-btn.prev {
  left: 1rem;
}

.carousel-btn.next {
  right: 1rem;
}

.carousel-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.carousel-indicators {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
  z-index: 10;
}

.carousel-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  border: none;
  cursor: pointer;
  transition: background 0.3s ease;
}

.carousel-indicator.active {
  background: white;
}

.carousel-indicator:hover {
  background: rgba(255, 255, 255, 0.8);
}

/* ==========================================================================
   10. 通用頁面動畫 (Page Animations)
   ========================================================================== */

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

@keyframes fadeInUpLarge {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes lineExpand {
  to {
    width: 60px;
  }
}

@keyframes textReveal {
  from {
    clip-path: inset(0 100% 0 0);
  }
  to {
    clip-path: inset(0 0 0 0);
  }
}

/* 通用動畫類別 */
.anim-fade-in-up {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.anim-fade-in-up-large {
  opacity: 0;
  animation: fadeInUpLarge 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.anim-slide-in-left {
  opacity: 0;
  animation: slideInLeft 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.anim-slide-in-right {
  opacity: 0;
  animation: slideInRight 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.anim-scale-in {
  opacity: 0;
  animation: scaleIn 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

/* 動畫延遲類別 */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }
.delay-6 { animation-delay: 0.6s; }
.delay-7 { animation-delay: 0.7s; }
.delay-8 { animation-delay: 0.8s; }
.delay-9 { animation-delay: 0.9s; }

/* ==========================================================================
   11. Hero 區塊動畫 (Index Page)
   ========================================================================== */
#hero h1 {
  opacity: 0;
  animation: fadeInUpLarge 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s forwards;
}

#hero .subtitle {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.5s forwards;
}

#hero .lede {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.7s forwards;
}

.hero-cta {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.9s forwards;
}

/* Hero CTA 按鈕懸停效果 */
.hero-cta .btn {
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.hero-cta .btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--color-accent);
  transition: left 0.3s ease;
  z-index: -1;
}

.hero-cta .btn:hover::before {
  left: 0;
}

/* ==========================================================================
   12. About 頁面動畫
   ========================================================================== */
.about-media {
  opacity: 0;
  animation: slideInLeft 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s forwards;
}

.about-media img {
  filter: grayscale(100%);
  transition: filter 0.5s ease;
}

.about-media:hover img {
  filter: grayscale(0%);
}

.about-content {
  opacity: 0;
  animation: slideInRight 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.4s forwards;
}

.about-content h1 {
  position: relative;
  display: inline-block;
}

.about-content h1::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  animation: lineExpand 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.8s forwards;
}

/* ==========================================================================
   13. Projects 頁面動畫
   ========================================================================== */
.projects-page .section h1,
.projects-page .section-intro,
#projects-grid {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.projects-page .section h1 { animation-delay: 0.1s; }
.projects-page .section-intro { animation-delay: 0.3s; }
#projects-grid { animation-delay: 0.5s; }

/* ==========================================================================
  14. Video 頁面動畫
  ========================================================================== */
.video-page .section h1,
.video-page .section-intro,
.ribbon {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.video-page .section h1 { animation-delay: 0.1s; }
.video-page .section-intro { animation-delay: 0.3s; }
.ribbon { animation-delay: 0.5s; }

/* Ribbon 卡片效果 */
.ribbon-card {
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.ribbon-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.ribbon-card .card-media {
  filter: grayscale(100%);
  transition: filter 0.4s ease;
}

.ribbon-card:hover .card-media {
  filter: grayscale(0%);
}

/* Ribbon 導航按鈕 */
.ribbon-nav {
  transition: all 0.3s ease;
}

.ribbon-nav:hover {
  background: var(--color-text);
  color: var(--color-bg);
  transform: scale(1.1);
}

/* ==========================================================================
   15. Project Detail 頁面動畫
   ========================================================================== */
.carousel-container {
  opacity: 0;
  animation: scaleIn 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s forwards;
}

#project-content h1 {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.4s forwards;
}

#project-content .lede {
  opacity: 0;
  animation: fadeInUp 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.6s forwards;
}

/* Carousel 按鈕增強效果 */
.carousel-btn {
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.carousel-btn:hover:not(:disabled) {
  transform: translateY(-50%) scale(1.1);
  background: rgba(0, 0, 0, 0.95);
}

/* Carousel 指示器動畫 */
.carousel-indicator {
  transition: all 0.3s ease;
}

.carousel-indicator:hover {
  transform: scale(1.3);
}

.carousel-indicator.active {
  transform: scale(1.2);
}

/* 圖片畫廊過渡 */
.detail-media-group {
  opacity: 0;
  animation: fadeInUp 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.detail-media-group:nth-child(1) { animation-delay: 0.3s; }
.detail-media-group:nth-child(2) { animation-delay: 0.5s; }
.detail-media-group:nth-child(3) { animation-delay: 0.7s; }

/* ==========================================================================
   16. Publication 頁面樣式與動畫
   ========================================================================== */
.pub-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  margin-top: var(--space-6);
}

.pub-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: center;
  text-decoration: none;
  color: inherit;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  opacity: 0;
  transform: translateY(30px);
}

.pub-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.pub-item:hover {
  transform: translateX(10px);
}

.pub-item:hover .pub-cover img {
  filter: grayscale(0%);
  transform: scale(1.02);
}

.pub-cover {
  overflow: hidden;
}

.pub-cover img {
  width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
  filter: grayscale(100%);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.pub-info h2 {
  margin-bottom: var(--space-2);
  font-size: 1.5rem;
}

.publication-page .section h1 {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.1s forwards;
}

@media (max-width: 768px) {
  .pub-item {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   17. Contact 頁面動畫
   ========================================================================== */
.contact-form-wrapper {
  opacity: 0;
  animation: slideInLeft 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s forwards;
}

.contact-social {
  opacity: 0;
  animation: slideInRight 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.4s forwards;
}

/* 表單欄位動畫 */
.contact-form-wrapper .form-field {
  opacity: 0;
  animation: fadeInUp 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.contact-form-wrapper .form-field:nth-child(1) { animation-delay: 0.3s; }
.contact-form-wrapper .form-field:nth-child(2) { animation-delay: 0.4s; }
.contact-form-wrapper .form-field:nth-child(3) { animation-delay: 0.5s; }

/* 表單輸入框焦點效果 */
.contact-form-wrapper .form-field input:focus,
.contact-form-wrapper .form-field textarea:focus {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

/* 社交連結 Hover 效果 */
.contact-social .social-list a {
  position: relative;
  overflow: hidden;
}

.contact-social .social-list a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.3s ease;
}

.contact-social .social-list a:hover::before {
  width: 100%;
}

.contact-social .social-list li {
  opacity: 0;
  animation: fadeInUp 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.contact-social .social-list li:nth-child(1) { animation-delay: 0.5s; }
.contact-social .social-list li:nth-child(2) { animation-delay: 0.6s; }
.contact-social .social-list li:nth-child(3) { animation-delay: 0.7s; }

/* 送出按鈕效果 */
#contact-form .btn {
  opacity: 0;
  animation: fadeInUp 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.6s forwards;
  position: relative;
  overflow: hidden;
}

#contact-form .btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.4s ease, height 0.4s ease;
}

#contact-form .btn:hover::after {
  width: 300px;
  height: 300px;
}

/* ==========================================================================
   18. 頁面載入過渡
   ========================================================================== */
.page-loading .section {
  opacity: 0;
}

.page-loaded .section {
  opacity: 1;
  transition: opacity 0.5s ease;
}