/* 導入 Noto Serif TC (金句與大字) 與 Noto Sans TC (內文與字幕) */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;700;900&family=Noto+Serif+TC:wght@700;900&family=JetBrains+Mono:wght@300;500&display=swap');

/* 全局重設 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg-dark: #070B19;
  --color-bg-card: #0B132B;
  --color-cyan: #00F2FE;
  --color-blue: #4FACFE;
  --color-gold: #FFD700;
  --color-white: #F8FAFC;
  --color-gray: #94A3B8;
  --color-red: #EF4444;
  --font-serif: 'Noto Serif TC', serif;
  --font-sans: 'Noto Sans TC', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

body {
  background-color: var(--color-bg-dark);
  color: var(--color-white);
  font-family: var(--font-sans);
  overflow: hidden;
  width: 100vw;
  height: 100vh;
}

/* 播放遮罩 (Glow Overlay) */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-bg-dark);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: opacity 0.8s ease, visibility 0.8s;
}

.overlay.hide {
  opacity: 0;
  visibility: hidden;
}

.overlay-content {
  text-align: center;
}

.overlay-content h1 {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  margin-bottom: 1rem;
  color: var(--color-white);
  text-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
}

.overlay-content p {
  font-size: 1.5rem;
  color: var(--color-gray);
  margin-bottom: 3rem;
}

.glow-btn {
  background: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-blue) 100%);
  color: var(--color-bg-dark);
  border: none;
  padding: 1rem 2.5rem;
  font-size: 1.2rem;
  font-weight: 900;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: 0 0 30px rgba(0, 242, 254, 0.6);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.glow-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 40px rgba(0, 242, 254, 0.9);
}

/* 主影片容器 */
.video-container {
  position: relative;
  width: 100%;
  height: 100%;
  background-color: var(--color-bg-dark);
  overflow: hidden;
}

/* 全局頂部章節指示器 */
.chapter-indicator {
  position: absolute;
  top: 40px;
  left: 50px;
  z-index: 100;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-gray);
  letter-spacing: 2px;
  display: flex;
  align-items: center;
  gap: 15px;
}

.chapter-indicator #chapter-num {
  color: var(--color-cyan);
  font-weight: 500;
  border: 1px stroke var(--color-cyan);
  padding: 3px 8px;
  background-color: rgba(0, 242, 254, 0.1);
  border-radius: 4px;
}

.chapter-indicator #chapter-title {
  text-transform: uppercase;
}

/* 全局底部進度條 (8px 漸層) */
.progress-bar-container {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 8px;
  background-color: rgba(255, 255, 255, 0.05);
  z-index: 100;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-cyan) 0%, var(--color-blue) 50%, var(--color-gold) 100%);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.8);
  transition: width 0.1s linear;
}

/* 全局底部字幕 (半透明深底框) */
.subtitle-container {
  display: none;
  position: absolute;
  bottom: 45px;
  left: 50%;
  transform: translateX(-50%);
  background-color: rgba(11, 19, 43, 0.85);
  border: 1px solid rgba(0, 242, 254, 0.2);
  border-radius: 12px;
  padding: 12px 30px;
  max-width: 95%;
  z-index: 100;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.subtitle-container.show {
  opacity: 1;
}

.subtitle-container p {
  font-size: clamp(0.9rem, 1.8vw, 1.3rem);
  font-weight: 500;
  line-height: 1.6;
  color: var(--color-white);
  white-space: nowrap;
}

/* 前進/倒退按鈕 */
.skip-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  background: rgba(11, 19, 43, 0.6);
  border: 1px solid rgba(0, 242, 254, 0.2);
  color: var(--color-white);
  font-size: 1.5rem;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.3s, background 0.3s;
  backdrop-filter: blur(8px);
}

.video-container:hover .skip-btn {
  opacity: 0.6;
}

.skip-btn:hover {
  opacity: 1 !important;
  background: rgba(0, 242, 254, 0.15);
  border-color: var(--color-cyan);
}

.skip-back { left: 20px; }
.skip-forward { right: 20px; }

/* 場景切換框架 */
.scenes-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
}

.scene {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease-in-out, visibility 0.15s;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 電影感黑場過渡遮罩 */
#transitionMask {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-bg-dark);
  opacity: 0;
  visibility: hidden;
  z-index: 50;
  pointer-events: none;
  transition: opacity 0.25s ease-in-out, visibility 0.25s;
}

#transitionMask.active {
  opacity: 1;
  visibility: visible;
}

.scene.active {
  opacity: 1;
  visibility: visible;
}

/* ========================================== */
/* 版面 1: L5 純大字置中 (Hook / 金句) */
/* ========================================== */
.l5-layout {
  text-align: center;
  max-width: 80%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  transform: scale(0.95);
  transition: transform 10s linear;
}

.scene.active .l5-layout {
  transform: scale(1.03); /* Ken Burns 慢推 */
}

.l5-layout h1 {
  font-family: var(--font-serif);
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.4;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1.5s cubic-bezier(0.16, 1, 0.3, 1), transform 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.l5-layout h1.highlight {
  color: var(--color-gold);
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}

.l5-layout h1.font-huge {
  font-size: 3.8rem;
}

.l5-layout .font-sub {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  color: var(--color-cyan);
  letter-spacing: 4px;
  margin-top: -0.5rem;
  opacity: 0;
  transform: translateY(15px);
  transition: opacity 1.5s ease 1s, transform 1.5s ease 1s;
}

.l5-layout .font-medium {
  font-size: 2.2rem;
  color: var(--color-gray);
  margin-top: 1rem;
}

/* P1 動畫時序 */
.scene.active .p1-text-1 {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.5s;
}

.scene.active .p1-text-2 {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 2.5s;
}

/* P9 動畫時序 */
.scene.active .p9-text-1 {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.5s;
}

.scene.active .p9-text-2 {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 2.2s;
}

/* P10 動畫時序 */
.scene.active .p10-text-1 {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.5s;
}
.scene.active .p10-text-2 {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 2.0s;
}
.scene.active .p10-text-3 {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 4.0s;
}

/* ========================================== */
/* 版面 2: L2 左右分欄 */
/* ========================================== */
.l2-layout {
  display: flex;
  width: 90%;
  height: 80%;
  max-width: 1400px;
  gap: 5%;
}

.column-left {
  flex: 1;
  width: 50%;
}

.column-right {
  flex: 1;
  width: 50%;
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.flex-center-left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

/* L2 文字與標題 */
.scene-title {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 2rem;
  color: var(--color-white);
  border-left: 5px solid var(--color-cyan);
  padding-left: 15px;
}

/* P2: 以前的 AI */
.limit-list {
  list-style: none;
}

.limit-item {
  font-size: 1.2rem;
  color: var(--color-gray);
  margin-bottom: 1.2rem;
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 1.0s ease, transform 1.0s ease;
}

.scene.active .limit-item.text-1 {
  opacity: 1;
  transform: translateX(0);
  transition-delay: 1.5s;
}

.scene.active .limit-item.text-2 {
  opacity: 1;
  transform: translateX(0);
  transition-delay: 3.5s;
  color: var(--color-white);
}

.scene.active .limit-item.text-3 {
  opacity: 1;
  transform: translateX(0);
  transition-delay: 5.5s;
}

/* P2 SVG 玻璃箱動畫 */
.glass-box {
  stroke-dasharray: 8,8;
  animation: rotate-dashed 40s linear infinite;
  transform-origin: 100px 100px;
}

@keyframes rotate-dashed {
  100% {
    transform: rotate(360deg);
  }
}

.robot-head, .robot-body {
  filter: drop-shadow(0 0 5px rgba(148, 163, 184, 0.3));
}

.robot-antenna {
  animation: blink-red 1s infinite alternate;
}

@keyframes blink-red {
  0% { fill: #ef4444; filter: drop-shadow(0 0 1px #ef4444); }
  100% { fill: #fca5a5; filter: drop-shadow(0 0 8px #ef4444); }
}

/* P4: 萬能插座 */
.socket-shell {
  filter: drop-shadow(0 0 10px rgba(0, 242, 254, 0.4));
}

.wire-flow {
  stroke-dasharray: 6,6;
  animation: flow-wire 2s linear infinite;
}

@keyframes flow-wire {
  100% {
    stroke-dashoffset: -20;
  }
}

.metaphor-desc {
  font-size: 1.15rem;
  margin-bottom: 1.2rem;
  color: var(--color-gray);
  opacity: 0;
  transform: translateY(15px);
  transition: opacity 1s ease, transform 1s ease;
}

.metaphor-desc strong {
  color: var(--color-gold);
}

.scene.active .metaphor-desc.text-1 { opacity: 1; transform: translateY(0); transition-delay: 1s; }
.scene.active .metaphor-desc.text-2 { opacity: 1; transform: translateY(0); transition-delay: 4s; }
.scene.active .metaphor-desc.text-3 { opacity: 1; transform: translateY(0); transition-delay: 7s; color: var(--color-white); }

/* ========================================== */
/* 版面 3: L4 SVG 置中 */
/* ========================================== */
.l4-layout {
  width: 90%;
  height: 90%;
  max-width: 1000px;
}

.scene-title-top {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 900;
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--color-white);
  text-shadow: 0 0 15px rgba(255, 255, 255, 0.15);
}

.svg-container {
  width: 100%;
  height: 75%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.glow-svg {
  filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.1));
  overflow: visible;
}

/* P3: 缺一把鑰匙 */
.broken-line {
  stroke: #475569;
  stroke-width: 2.5;
  stroke-dasharray: 4,4;
  opacity: 0.3;
}

.glow-chip rect {
  filter: drop-shadow(0 0 5px rgba(71, 85, 105, 0.4));
}

.tool-node {
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  transform-origin: center;
}

/* P3 工具逐一浮現 */
.scene.active .tool-node.t1 { opacity: 1; transform: scale(1); transition-delay: 1s; }
.scene.active .tool-node.t2 { opacity: 1; transform: scale(1); transition-delay: 2.2s; }
.scene.active .tool-node.t3 { opacity: 1; transform: scale(1); transition-delay: 3.4s; }
.scene.active .tool-node.t4 { opacity: 1; transform: scale(1); transition-delay: 4.6s; }
.scene.active .tool-node.t5 { opacity: 1; transform: scale(1); transition-delay: 5.8s; }
.scene.active .tool-node.t6 { opacity: 1; transform: scale(1); transition-delay: 7s; }

.scene.active .broken-line {
  opacity: 0.6;
  transition: opacity 1.5s ease 8s;
}

/* P5: 怎麼運作 */
.ai-core {
  filter: drop-shadow(0 0 15px rgba(0, 242, 254, 0.8));
  animation: pulse-core 3s infinite alternate;
}

@keyframes pulse-core {
  0% { r: 30; }
  100% { r: 32; stroke-width: 5; }
}

.ai-pulse {
  animation: radar-wave 3s infinite;
  transform-origin: 200px 150px;
}

@keyframes radar-wave {
  0% { r: 30; opacity: 1; }
  100% { r: 80; opacity: 0; }
}

.mcp-badge {
  opacity: 0;
  transform: scale(0.6);
  transition: opacity 0.8s ease 1s, transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275) 1s;
  transform-origin: 200px 105px;
}

.scene.active .mcp-badge {
  opacity: 1;
  transform: scale(1);
}

.mcp-line {
  stroke: var(--color-cyan);
  stroke-width: 3;
  stroke-dasharray: 300;
  stroke-dashoffset: 300;
  opacity: 0.8;
  filter: drop-shadow(0 0 4px var(--color-cyan));
}

.mcp-node {
  opacity: 0;
  transform: scale(0.5);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  transform-origin: center;
}

/* P5 放射連線動畫時序 */
.scene.active .line-1 { stroke-dashoffset: 0; transition: stroke-dashoffset 1.5s ease 2.0s; }
.scene.active .line-2 { stroke-dashoffset: 0; transition: stroke-dashoffset 1.5s ease 2.6s; }
.scene.active .line-3 { stroke-dashoffset: 0; transition: stroke-dashoffset 1.5s ease 3.2s; }
.scene.active .line-4 { stroke-dashoffset: 0; transition: stroke-dashoffset 1.5s ease 3.8s; }
.scene.active .line-5 { stroke-dashoffset: 0; transition: stroke-dashoffset 1.5s ease 4.4s; }
.scene.active .line-6 { stroke-dashoffset: 0; transition: stroke-dashoffset 1.5s ease 5.0s; }

.scene.active .mn-1 { opacity: 1; transform: scale(1); transition-delay: 3.2s; }
.scene.active .mn-2 { opacity: 1; transform: scale(1); transition-delay: 3.8s; }
.scene.active .mn-3 { opacity: 1; transform: scale(1); transition-delay: 4.4s; }
.scene.active .mn-4 { opacity: 1; transform: scale(1); transition-delay: 5.0s; }
.scene.active .mn-5 { opacity: 1; transform: scale(1); transition-delay: 5.6s; }
.scene.active .mn-6 { opacity: 1; transform: scale(1); transition-delay: 6.2s; }

.scene.active .mcp-node circle {
  stroke: var(--color-cyan);
  filter: drop-shadow(0 0 5px rgba(0, 242, 254, 0.5));
  transition: stroke 0.5s, filter 0.5s;
}
.scene.active .mn-1 circle { transition-delay: 3.2s; }
.scene.active .mn-2 circle { transition-delay: 3.8s; }
.scene.active .mn-3 circle { transition-delay: 4.4s; }
.scene.active .mn-4 circle { transition-delay: 5.0s; }
.scene.active .mn-5 circle { transition-delay: 5.6s; }
.scene.active .mn-6 circle { transition-delay: 6.2s; }

/* ========================================== */
/* 版面 4: L6 對比並排 (以前 vs 現在) */
/* ========================================== */
.l6-layout {
  display: flex;
  width: 90%;
  height: 80%;
  max-width: 1200px;
  gap: 40px;
}

.pane {
  flex: 1;
  background-color: var(--color-bg-card);
  border-radius: 16px;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transform: translateY(30px);
  opacity: 0;
  transition: transform 1s cubic-bezier(0.16, 1, 0.3, 1), opacity 1s ease;
}

.scene.active .pane-left {
  transform: translateY(0);
  opacity: 1;
  transition-delay: 0.5s;
}

.scene.active .pane-right {
  transform: translateY(0);
  opacity: 1;
  transition-delay: 3.5s;
  border: 1px solid rgba(0, 242, 254, 0.2);
  box-shadow: 0 10px 40px rgba(0, 242, 254, 0.1);
}

.pane-title {
  font-size: 1.4rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.text-red { color: var(--color-red); }
.text-cyan { color: var(--color-cyan); }

.mini-svg {
  height: 160px;
  width: 100%;
}

.messy-line {
  opacity: 0.4;
  stroke-dasharray: 3,3;
  animation: shake 0.5s infinite alternate;
}

@keyframes shake {
  0% { transform: translate(0.5px, 0.5px) rotate(0deg); }
  100% { transform: translate(-0.5px, -0.5px) rotate(0.1deg); }
}

.clean-line {
  stroke-dasharray: 200;
  stroke-dashoffset: 200;
}

.scene.active .clean-line {
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s ease 4.5s;
}

/* ========================================== */
/* 版面 5: L3 圖示陣列 2x2 (能做什麼) */
/* ========================================== */
.l3-layout {
  width: 90%;
  height: 80%;
  max-width: 1100px;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 25px;
  width: 100%;
  margin-top: 1rem;
}

.grid-card {
  background-color: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s, box-shadow 0.3s;
}

.grid-card:hover {
  border-color: var(--color-cyan);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.15);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 2.5rem;
  background-color: rgba(255, 255, 255, 0.02);
  width: 70px;
  height: 70px;
  border-radius: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.card-info h3 {
  font-size: 1.2rem;
  margin-bottom: 5px;
  color: var(--color-white);
}

.card-info p {
  font-size: 0.9rem;
  color: var(--color-gray);
  line-height: 1.4;
}

/* P7 卡片逐張浮現（對齊口白時間） */
.scene.active .grid-card.c1 { opacity: 1; transform: translateY(0); transition-delay: 0.5s; }
.scene.active .grid-card.c2 { opacity: 1; transform: translateY(0); transition-delay: 3.0s; }
.scene.active .grid-card.c3 { opacity: 1; transform: translateY(0); transition-delay: 5.5s; }
.scene.active .grid-card.c4 { opacity: 1; transform: translateY(0); transition-delay: 8.0s; }

/* ========================================== */
/* P8: 真實場景對話與流程 */
/* ========================================== */
.chat-bubble {
  background-color: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: 15px 25px;
  font-size: 1.15rem;
  max-width: 80%;
  margin-bottom: 20px;
  opacity: 0;
  transform: scale(0.9) translateY(10px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.chat-bubble.user {
  align-self: flex-end;
  border-top-right-radius: 2px;
  border-color: rgba(79, 172, 254, 0.3);
  background: linear-gradient(135deg, rgba(11, 19, 43, 0.8) 0%, rgba(79, 172, 254, 0.1) 100%);
}

.chat-bubble.ai {
  align-self: flex-start;
  border-top-left-radius: 2px;
  border-color: rgba(0, 242, 254, 0.3);
  background: linear-gradient(135deg, rgba(11, 19, 43, 0.8) 0%, rgba(0, 242, 254, 0.1) 100%);
}

.scene.active .chat-bubble.user {
  opacity: 1;
  transform: scale(1) translateY(0);
  transition-delay: 1s;
}

.scene.active .chat-bubble.ai {
  opacity: 1;
  transform: scale(1) translateY(0);
  transition-delay: 4.5s;
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
  width: 100%;
}

.step-item {
  display: flex;
  align-items: center;
  gap: 15px;
  opacity: 0;
  transform: translateX(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-cyan);
  color: var(--color-bg-dark);
  font-family: var(--font-mono);
  font-weight: 900;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.4);
}

.step-item p {
  font-size: 1.1rem;
  color: var(--color-gray);
}

/* P8 流程三步驟動畫 */
.scene.active .step-item.s1 { opacity: 1; transform: translateX(0); transition-delay: 7s; }
.scene.active .step-item.s2 { opacity: 1; transform: translateX(0); transition-delay: 10s; }
.scene.active .step-item.s3 { opacity: 1; transform: translateX(0); transition-delay: 13s; }
.scene.active .step-item.s3 p { color: var(--color-gold); font-weight: 500; }