/* Social links */
.social-section {
  padding: 1.5rem 0 0.2rem; /* 往下移，並貼近 footer */
}

.social-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.75rem;
}

.social-icon {
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #2e6af3; /* 較亮的藍 */
  background: rgba(46, 106, 243, 0.12);
  border-radius: 50%; /* 改為圓形 */
  transition: transform 0.2s ease, background 0.2s ease;
}

.social-icon:hover {
  transform: translateY(-2px);
  background: rgba(46, 106, 243, 0.22);
}

.social-icon svg {
  width: 26px;
  height: 26px; /* 四個 icon 尺寸一致，與容器同比例放大 */
  fill: currentColor;
}
/* Modern Reset and Variables */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Modern Color Scheme - More Balanced */
  --primary-bg: #0f0f23;
  --secondary-bg: #1a1a2e;
  --accent-bg: #16213e;
  --card-bg: rgba(22, 33, 62, 0.8);

  /* Professional Colors */
  --accent-teal: #4ecdc4;
  --accent-blue: #45b7d1;
  --accent-purple: #6c5ce7;
  --warning-orange: #fd79a8;
  --success-green: #00b894;

  /* Gradients */
  --hero-gradient: linear-gradient(
    135deg,
    #0f0f23 0%,
    #1a1a2e 50%,
    #16213e 100%
  );
  --accent-gradient: linear-gradient(
    135deg,
    #4ecdc4 0%,
    #45b7d1 50%,
    #6c5ce7 100%
  );
  --progress-gradient: linear-gradient(90deg, #4ecdc4 0%, #45b7d1 100%);
  --card-gradient: linear-gradient(
    135deg,
    rgba(22, 33, 62, 0.9) 0%,
    rgba(26, 26, 46, 0.8) 100%
  );

  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #b0b3b8;
  --text-muted: #8b949e;
  --text-accent: #4ecdc4;

  /* Effects */
  --glow-teal: 0 0 20px rgba(78, 205, 196, 0.3);
  --glow-blue: 0 0 20px rgba(69, 183, 209, 0.3);
  --glow-purple: 0 0 20px rgba(108, 92, 231, 0.3);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-elevated: 0 20px 60px rgba(0, 0, 0, 0.5);

  /* Layout */
  --max-width: 1200px;
  --section-padding: clamp(40px, 8vw, 80px);
  --border-radius: 20px;
  --border-radius-sm: 12px;

  /* Animation */
  --transition-smooth: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-bounce: all 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Base Styles */
html {
  scroll-behavior: smooth;
  background: var(--hero-gradient); /* 防止橡皮筋露白 */
  background-attachment: fixed;
  height: 100%;
}

body {
  font-family: "Inter", "SF Pro Display", -apple-system, BlinkMacSystemFont,
    sans-serif;
  background: var(--hero-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  /* 保持彈性滾動（允許滑過頭），並以 html/body 背景避免露白 */
  overscroll-behavior: auto;
}

/* 安全層：用固定背景覆蓋視窗，避免彈性滾動露出底色 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: var(--hero-gradient);
  z-index: -1;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 40px);
  background: transparent;
}

/* Subtle Grid Background */
.cyber-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(
    circle at 1px 1px,
    rgba(78, 205, 196, 0.1) 1px,
    transparent 0
  );
  background-size: 60px 60px;
  pointer-events: none;
  z-index: -2;
  opacity: 0.5;
}

/* Subtle Floating Particles */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.4;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent-teal);
  border-radius: 50%;
  animation: float 8s ease-in-out infinite;
  box-shadow: 0 0 6px rgba(78, 205, 196, 0.3);
}

.particle:nth-child(odd) {
  background: var(--accent-blue);
  box-shadow: 0 0 6px rgba(69, 183, 209, 0.3);
  animation-delay: -4s;
}

.particle:nth-child(3n) {
  background: var(--accent-purple);
  box-shadow: 0 0 6px rgba(108, 92, 231, 0.3);
  animation-delay: -2s;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
    opacity: 0;
  }
  10%,
  90% {
    opacity: 1;
  }
  50% {
    transform: translateY(-100vh) rotate(180deg);
  }
}

/* Main Layout */
.main-content {
  position: relative;
  z-index: 1;
  background: transparent;
}

/* Channel Logo */
.channel-logo {
  display: flex;
  justify-content: center;
  margin-bottom: 0.8rem;
  animation: logoFloat 6s ease-in-out infinite;
}

@keyframes logoFloat {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-5px);
  }
}

.logo-circle {
  width: 130px;
  height: 130px;
  background: linear-gradient(135deg, #4ecdc4 0%, #45b7d1 100%);
  border-radius: 50%;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(78, 205, 196, 0.3), 0 8px 32px rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(255, 255, 255, 0.15);
  transition: var(--transition-smooth);
  cursor: pointer;
}

.logo-circle:hover {
  transform: scale(1.03) rotate(2deg);
  box-shadow: 0 0 30px rgba(78, 205, 196, 0.4), 0 12px 40px rgba(0, 0, 0, 0.4);
}

.logo-mic {
  font-size: 2.3rem;
  margin-bottom: 0.3rem;
  filter: sepia(1) hue-rotate(200deg) brightness(0.3);
}

.logo-text-top {
  font-size: 0.7rem;
  font-weight: 800;
  color: #2c5282;
  text-transform: uppercase;
  letter-spacing: 1px;
  line-height: 1;
  text-align: center;
  margin-bottom: 0.2rem;
}

.logo-text-bottom {
  font-size: 0.85rem;
  font-weight: 700;
  color: #2c5282;
  line-height: 1;
  text-align: center;
}

.logo-stars {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}

.star {
  position: absolute;
  font-size: 1.2rem;
  color: #2c5282;
  top: 50%;
  animation: starTwinkle 4s ease-in-out infinite;
}

.star.left {
  left: 15%;
  animation-delay: 0s;
}

.star.right {
  right: 15%;
  animation-delay: 2s;
}

@keyframes starTwinkle {
  0%,
  100% {
    opacity: 0.7;
    transform: translateY(-50%) scale(1);
  }
  50% {
    opacity: 1;
    transform: translateY(-50%) scale(1.1);
  }
}

/* Alternative: Real Logo Image */
.logo-image {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  cursor: pointer;
  transition: var(--transition-smooth);
  animation: logoFloat 6s ease-in-out infinite;
  box-shadow: 0 0 30px rgba(125, 211, 192, 0.4), 0 8px 32px rgba(0, 0, 0, 0.3);
  border: 3px solid rgba(255, 255, 255, 0.1);
}

.logo-image:hover {
  transform: scale(1.05) rotate(5deg);
  box-shadow: 0 0 50px rgba(125, 211, 192, 0.6), 0 15px 40px rgba(0, 0, 0, 0.4);
}

/* Hero Section */
.hero {
  min-height: auto;
  max-height: none;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  text-align: center;
  padding: clamp(20px, 3vh, 40px) 0 clamp(8px, 2vh, 12px);
  background: transparent;
  position: relative;
  overflow: visible;
}

.hero-title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-top: 0; /* prevent UA default top margin causing large gaps */
  margin-bottom: 1rem;
  line-height: 1.1;
  filter: drop-shadow(0 4px 20px rgba(78, 205, 196, 0.2));
}

@keyframes glow {
  from {
    filter: drop-shadow(0 0 20px rgba(0, 255, 136, 0.5));
  }
  to {
    filter: drop-shadow(0 0 40px rgba(0, 255, 136, 0.8));
  }
}

.hero-subtitle {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  color: #e1e7ef;
  margin-bottom: 1.5rem;
  max-width: 800px;
  font-weight: 400;
  letter-spacing: 0.5px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  opacity: 0.95;
}

/* Progress Section */
.progress-section {
  background: rgba(15, 15, 35, 0.7);
  backdrop-filter: blur(30px);
  border: 1px solid rgba(78, 205, 196, 0.2);
  border-radius: var(--border-radius);
  padding: clamp(0.8rem, 2vw, 1.2rem);
  margin: clamp(1.2rem, 3vw, 2rem) 0 clamp(0.8rem, 2vw, 1.5rem) 0;
  box-shadow: var(--shadow-card);
  transition: var(--transition-smooth);
  max-width: 600px;
  width: 100%;
  position: relative;
  overflow: clip; /* prevents scroll jank from overflow painting on large images */
}

.progress-section:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-elevated);
  border-color: rgba(78, 205, 196, 0.4);
}

.progress-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(78, 205, 196, 0.1),
    transparent
  );
  animation: progressSectionShine 3s infinite;
}

@keyframes progressSectionShine {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.stat-card {
  text-align: center;
  padding: 1.2rem;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--border-radius-sm);
  border: 1px solid rgba(78, 205, 196, 0.2);
  transition: var(--transition-smooth);
}

.stat-card:hover {
  transform: translateY(-2px);
  background: rgba(78, 205, 196, 0.1);
  border-color: rgba(78, 205, 196, 0.4);
}

.stat-number {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  margin-bottom: 0.5rem;
  animation: numberGlow 3s ease-in-out infinite;
  position: relative;
}

.stat-number::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: blur(8px);
  opacity: 0;
  z-index: -1;
  animation: numberGlowEffect 3s ease-in-out infinite;
}

@keyframes numberGlow {
  0%,
  100% {
    transform: scale(1);
    filter: brightness(1);
  }
  50% {
    transform: scale(1.02);
    filter: brightness(1.2);
  }
}

@keyframes numberGlowEffect {
  0%,
  100% {
    opacity: 0;
  }
  50% {
    opacity: 0.3;
  }
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 500;
}

/* Progress Bar */
.progress-container {
  margin: 2rem 0;
  position: relative;
}

/* Progress Particles */
.progress-particles {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  pointer-events: none;
  z-index: 2;
  transform: translateY(-50%);
  overflow: hidden;
}

.progress-particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent-teal);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat 4s linear infinite;
}

.progress-particle:nth-child(1) {
  animation-delay: 0s;
  top: -15px;
  background: var(--accent-teal);
  box-shadow: 0 0 8px rgba(78, 205, 196, 0.8);
}
.progress-particle:nth-child(2) {
  animation-delay: 1s;
  top: 15px;
  background: var(--accent-blue);
  box-shadow: 0 0 8px rgba(69, 183, 209, 0.8);
}
.progress-particle:nth-child(3) {
  animation-delay: 2s;
  top: -20px;
  background: var(--accent-purple);
  box-shadow: 0 0 8px rgba(108, 92, 231, 0.8);
}
.progress-particle:nth-child(4) {
  animation-delay: 3s;
  top: 20px;
  background: var(--accent-teal);
  box-shadow: 0 0 8px rgba(78, 205, 196, 0.8);
}

@keyframes particleFloat {
  0% {
    left: -10px;
    opacity: 0;
    transform: translateY(0) scale(0.5) rotate(0deg);
  }
  10% {
    opacity: 1;
    transform: translateY(0) scale(1) rotate(180deg);
  }
  50% {
    transform: translateY(-3px) scale(1.2) rotate(360deg);
  }
  90% {
    opacity: 1;
    transform: translateY(0) scale(1) rotate(540deg);
  }
  100% {
    left: calc(100% + 10px);
    opacity: 0;
    transform: translateY(0) scale(0.5) rotate(720deg);
  }
}

/* Progress Sparks Effect */
.progress-sparks {
  position: absolute;
  top: 50%;
  right: 0;
  width: 2px;
  height: 2px;
  pointer-events: none;
  z-index: 4;
  transform: translateY(-50%);
}

.spark {
  position: absolute;
  width: 2px;
  height: 2px;
  background: #ffd700;
  border-radius: 50%;
  animation: sparkFly 1s ease-out infinite;
  opacity: 0;
}

.spark:nth-child(1) {
  animation-delay: 0ms;
  animation-duration: 0.8s;
}
.spark:nth-child(2) {
  animation-delay: 200ms;
  animation-duration: 1.2s;
}
.spark:nth-child(3) {
  animation-delay: 400ms;
  animation-duration: 1s;
}

@keyframes sparkFly {
  0% {
    transform: translate(0, 0) scale(1);
    opacity: 1;
    background: #ffd700;
  }
  50% {
    background: #ff6b35;
    opacity: 0.8;
  }
  100% {
    transform: translate(var(--spark-x, 20px), var(--spark-y, -15px)) scale(0);
    opacity: 0;
    background: #4ecdc4;
  }
}

.progress-bar {
  width: 100%;
  height: 20px;
  background: var(--secondary-bg);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3),
    0 0 15px rgba(78, 205, 196, 0.2);
  animation: progressBarGlow 3s ease-in-out infinite;
}

.progress-bar::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(78, 205, 196, 0.1) 30%,
    rgba(69, 183, 209, 0.2) 50%,
    rgba(78, 205, 196, 0.1) 70%,
    transparent 100%
  );
  animation: progressBarSweep 4s ease-in-out infinite;
}

.progress-bar::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  right: 2px;
  bottom: 2px;
  border-radius: 8px;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.1) 0%,
    transparent 50%,
    rgba(0, 0, 0, 0.1) 100%
  );
  pointer-events: none;
}

@keyframes progressBarGlow {
  0%,
  100% {
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3),
      0 0 15px rgba(78, 205, 196, 0.2);
  }
  50% {
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3),
      0 0 25px rgba(78, 205, 196, 0.4);
  }
}

@keyframes progressBarSweep {
  0% {
    left: -100%;
  }
  50% {
    left: 0%;
  }
  100% {
    left: 100%;
  }
}

.progress-fill {
  height: 100%;
  background: var(--progress-gradient);
  border-radius: 10px;
  width: 0%;
  transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  box-shadow: 0 0 10px rgba(78, 205, 196, 0.5),
    inset 0 0 10px rgba(78, 205, 196, 0.2), 2px 0 15px rgba(78, 205, 196, 0.3);
  animation: progressPulse 2s ease-in-out infinite;
  overflow: hidden;
}

.progress-fill::before {
  content: "";
  position: absolute;
  top: 0;
  right: -3px;
  width: 6px;
  height: 100%;
  background: linear-gradient(
    90deg,
    rgba(78, 205, 196, 0.8) 0%,
    rgba(78, 205, 196, 0.4) 50%,
    transparent 100%
  );
  border-radius: 0 10px 10px 0;
  z-index: 1;
  filter: blur(1px);
}

.progress-fill-edge {
  position: absolute;
  top: 0;
  right: -5px;
  width: 10px;
  height: 100%;
  background: linear-gradient(
    90deg,
    rgba(78, 205, 196, 0.6) 0%,
    rgba(78, 205, 196, 0.2) 50%,
    transparent 100%
  );
  border-radius: 0 10px 10px 0;
  z-index: 1;
  filter: blur(2px);
}

.progress-fill::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.8) 30%,
    rgba(255, 255, 255, 1) 50%,
    rgba(255, 255, 255, 0.8) 70%,
    transparent 100%
  );
  border-radius: 10px;
  animation: shimmer 1.5s infinite;
  opacity: 0.7;
}

/* Progress End Indicator */
.progress-end-indicator {
  position: absolute;
  top: 50%;
  right: -4px;
  width: 8px;
  height: 24px;
  background: linear-gradient(135deg, #4ecdc4 0%, #45b7d1 100%);
  border-radius: 50%;
  transform: translateY(-50%);
  box-shadow: 0 0 15px rgba(78, 205, 196, 0.8), 0 0 30px rgba(78, 205, 196, 0.4),
    inset 0 2px 4px rgba(255, 255, 255, 0.3);
  animation: progressIndicatorPulse 2s ease-in-out infinite;
  z-index: 3;
}

.progress-end-indicator::before {
  content: "";
  position: absolute;
  top: -3px;
  left: -3px;
  right: -3px;
  bottom: -3px;
  background: radial-gradient(
    circle,
    rgba(78, 205, 196, 0.4) 0%,
    transparent 70%
  );
  border-radius: 50%;
  animation: progressIndicatorRings 3s ease-in-out infinite;
}

.progress-end-indicator::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  right: 2px;
  bottom: 2px;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.8) 0%,
    transparent 100%
  );
  border-radius: 50%;
}

@keyframes progressIndicatorPulse {
  0%,
  100% {
    transform: translateY(-50%) scale(1);
    box-shadow: 0 0 15px rgba(78, 205, 196, 0.8),
      0 0 30px rgba(78, 205, 196, 0.4);
  }
  50% {
    transform: translateY(-50%) scale(1.2);
    box-shadow: 0 0 25px rgba(78, 205, 196, 1), 0 0 50px rgba(78, 205, 196, 0.6);
  }
}

@keyframes progressIndicatorRings {
  0% {
    transform: scale(1);
    opacity: 0.8;
  }
  50% {
    transform: scale(1.5);
    opacity: 0.3;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

@keyframes progressPulse {
  0%,
  100% {
    box-shadow: 0 0 10px rgba(78, 205, 196, 0.5),
      inset 0 0 10px rgba(78, 205, 196, 0.2);
  }
  50% {
    box-shadow: 0 0 20px rgba(78, 205, 196, 0.8),
      inset 0 0 15px rgba(78, 205, 196, 0.4);
  }
}

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

@keyframes shimmer {
  0% {
    transform: translateX(-120%) skewX(-15deg);
    opacity: 0;
  }
  20% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    transform: translateX(120%) skewX(-15deg);
    opacity: 0;
  }
}

.progress-text {
  text-align: center;
  margin-top: 0.8rem;
  font-size: 1.2rem;
  color: #62f1e5;
  font-weight: 600;
  animation: progressTextPulse 2.5s ease-in-out infinite;
  text-shadow: 0 0 10px rgba(78, 205, 196, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.progress-text span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
  animation: percentageBounce 2s ease-in-out infinite;
  display: inline-block;
  position: relative;
  overflow: hidden;
  min-width: 4rem;
  text-align: center;
}

.progress-text span::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(78, 205, 196, 0.3) 50%,
    transparent 100%
  );
  animation: percentageGlow 3s ease-in-out infinite;
}

@keyframes percentageGlow {
  0% {
    left: -100%;
  }
  50% {
    left: 0%;
  }
  100% {
    left: 100%;
  }
}

.milestone-text {
  text-align: center;
  margin-top: 1rem;
  font-size: 1rem;
  color: var(--text-secondary);
  animation: milestoneFloat 4s ease-in-out infinite;
}

.milestone-text span {
  color: var(--text-accent);
  font-weight: 600;
  animation: remainingPulse 3s ease-in-out infinite;
}

@keyframes progressTextPulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.02);
  }
}

@keyframes percentageBounce {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

@keyframes milestoneFloat {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-2px);
  }
}

@keyframes remainingPulse {
  0%,
  100% {
    color: var(--text-accent);
    text-shadow: 0 0 5px rgba(78, 205, 196, 0.3);
  }
  50% {
    color: var(--accent-blue);
    text-shadow: 0 0 15px rgba(78, 205, 196, 0.6);
  }
}

/* CTA Button */
.cta-section {
  text-align: center;
  margin-top: 0.25rem;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 2.2rem;
  background: var(--accent-gradient);
  color: #1e2a4a;
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  font-weight: 700;
  font-size: 1.25rem;
  transition: var(--transition-smooth);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(78, 205, 196, 0.3);
  position: relative;
  overflow: hidden;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.2);
}

.cta-button .cta-emoji {
  filter: drop-shadow(0 2px 6px rgba(78, 205, 196, 0.5));
}

.cta-button .cta-subtext {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: rgba(30, 42, 74, 0.8);
  margin-left: 0.3rem;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(78, 205, 196, 0.4);
}

.cta-button:active {
  transform: translateY(0);
}

/* Story Section */
.story-section {
  /* 上內距縮小，讓它更貼近進度條 */
  padding: clamp(10px, 2vh, 16px) 0;
  max-width: 1000px;
  margin: clamp(5px, 1vh, 15px) auto 0;
  background: transparent;
}

.story-content {
  background: rgba(15, 15, 35, 0.85);
  backdrop-filter: blur(25px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--border-radius);
  padding: clamp(2.5rem, 6vw, 4.5rem);
  box-shadow: var(--shadow-card);
  line-height: 1.75;
  max-width: 900px;
  margin: 0 auto;
}

/* Medium-style Story Title */
.story-title {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: #ffffff;
  text-align: left;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 0%, #e1e7ef 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Author Info Section */
.author-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2rem 0 2.5rem 0;
}

.author-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(78, 205, 196, 0.3);
  transition: all 0.3s ease;
}

.author-avatar:hover {
  transform: scale(1.05);
  border-color: rgba(78, 205, 196, 0.6);
}

.author-details {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.author-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
}

.author-email {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.95rem;
  color: #cfe6ff;
  text-decoration: none;
  opacity: 0.95;
}

.author-email:hover {
  text-decoration: underline;
}

.author-email-icon {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.author-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: 0.02em;
}

.author-date {
  font-size: 0.9rem;
  color: #b4c2d3;
  font-weight: 400;
  opacity: 0.8;
}

/* Lead paragraph (first paragraph) */
.story-lead {
  font-size: 1.3rem;
  line-height: 1.6;
  color: #d8e3f0;
  margin-bottom: 2rem;
  font-weight: 400;
  text-align: left;
  font-style: italic;
}

.story-content h2 {
  font-size: clamp(1.8rem, 4vw, 2.2rem);
  margin: 3rem 0 1.5rem 0;
  background: linear-gradient(135deg, #4ecdc4 0%, #45b7d1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.story-content h3 {
  font-size: clamp(1.4rem, 3vw, 1.7rem);
  margin: 2.5rem 0 1.2rem 0;
  color: #e1e7ef;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.story-content p {
  margin-bottom: 1.8rem;
  color: #d8e3f0;
  font-size: 1.2rem;
  line-height: 1.75;
  text-align: left;
  font-weight: 400;
  letter-spacing: 0.01em;
}

.story-content strong {
  font-weight: 700;
}

/* Story CTA Button - Coordinated with main CTA */
.story-cta-container {
  display: flex;
  justify-content: center;
  margin: 3rem 0;
}

.story-cta-button {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  background: var(--accent-gradient);
  color: #1e2a4a;
  padding: 1.2rem 2rem;
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 15px rgba(78, 205, 196, 0.3);
  position: relative;
  max-width: 380px;
  justify-content: space-between;
  border: 1px solid rgba(78, 205, 196, 0.2);
}

.story-cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(78, 205, 196, 0.4);
}

.story-cta-button .cta-icon {
  font-size: 1.3rem;
  animation: bounce 2s infinite;
}

.story-cta-button .cta-main {
  font-size: 1.2rem;
  font-weight: 800;
  flex: 1;
  text-align: center;
}

.story-cta-button .cta-sub {
  font-size: 0.85rem;
  font-weight: 500;
  opacity: 0.8;
  position: absolute;
  bottom: 0.3rem;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
}

.story-cta-button .cta-arrow {
  font-size: 1.1rem;
  font-weight: bold;
  transition: transform 0.3s ease;
  opacity: 0.7;
}

.story-cta-button:hover .cta-arrow {
  transform: translateX(3px);
  opacity: 1;
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-2px);
  }
  60% {
    transform: translateY(-1px);
  }
}

/* Responsive adjustments for story CTA */
@media (max-width: 768px) {
  .story-cta-button {
    padding: 0.75rem 1rem;
    font-size: 1rem;
    flex-direction: row; /* 改為橫向，減少高度 */
    align-items: center;
    text-align: center;
    gap: 0.5rem;
    max-width: 90%;
    position: relative;
  }

  .story-cta-button .cta-main {
    font-size: 1.1rem;
  }

  .story-cta-button .cta-sub {
    font-size: 0.8rem;
    position: static;
    transform: none;
  }

  .story-cta-button .cta-arrow {
    display: inline; /* 手機版顯示箭頭 */
    margin-left: 0.25rem;
  }
}

/* Reading comfort improvements */
.story-content {
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Special class for emphasized paragraphs */
.story-content .highlight-quote {
  font-size: 1.25rem;
  font-weight: 500;
  color: #e1e7ef;
  text-align: left;
  padding: 1.5rem 1.5rem 1.5rem 2rem;
  margin: 2.5rem 0;
  border-left: 4px solid #4ecdc4;
  border-radius: 0 8px 8px 0;
  background: rgba(78, 205, 196, 0.08);
  position: relative;
  box-shadow: 0 2px 8px rgba(78, 205, 196, 0.1);
}

/* Better paragraph spacing for readability */
.story-content p + p {
  margin-top: 1.8rem;
}

/* Video Section */
.video-section {
  margin: 3.5rem 0;
  text-align: center;
  padding: 0 1rem;
}

.video-header {
  max-width: 800px;
  margin: 0 auto 0.6rem auto;
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
}

.video-header .yt-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.7);
}

.video-header .yt-video-title {
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  font-weight: 700;
  color: #e9eef6;
}

.video-container {
  position: relative;
  max-width: 800px;
  margin: 2rem auto;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-elevated);
  transition: var(--transition-smooth);
  contain: content; /* isolate layout/paint to avoid page reflow blips */
}

.video-container:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-elevated), var(--glow-blue);
}

.video-thumbnail {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--secondary-bg);
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: var(--transition-smooth);
  will-change: transform, opacity; /* hint for smoother overlay transitions */
}

/* Medium-like top bar with channel and title */
.yt-topbar {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px 8px 8px;
  background: transparent; /* 不要遮罩 */
  border-radius: 12px;
  color: #fff;
  z-index: 3;
  backdrop-filter: none; /* 移除模糊 */
}

.yt-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  border: none; /* 不要外框 */
}

.yt-meta {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.yt-channel {
  display: none; /* 上方不用再寫頻道名 */
}

.yt-title {
  font-size: clamp(1rem, 2.4vw, 1.35rem); /* bigger for readability */
  font-weight: 800;
  letter-spacing: 0.2px;
}

/* Medium-like watch bar at bottom-left */
.yt-watchbar {
  position: absolute;
  left: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  padding: 14px 18px;
  color: #fff;
  font-size: 1.05rem;
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0) 0%,
    rgba(0, 0, 0, 0.65) 60%,
    rgba(0, 0, 0, 0.8) 100%
  );
  width: 100%;
  box-sizing: border-box;
  z-index: 2;
}

.yt-watchbar .yt-label {
  font-weight: 800;
  font-size: clamp(1.2rem, 3vw, 1.6rem); /* 再放大 */
}

.video-thumbnail::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.18); /* 預覽時輕微加深 */
  /* 重要：不要攔截點擊，讓使用者能操作 iframe（暫停/播放） */
  pointer-events: none;
  transition: var(--transition-smooth);
  will-change: opacity;
}

/* 播放中關閉任何灰層 */
.video-thumbnail.playing::before {
  background: transparent;
}

.video-thumbnail:hover::before {
  background: rgba(0, 0, 0, 0.1);
}

.play-button {
  width: 86px; /* larger play button */
  height: 60px;
  background: #ff0000; /* Medium-like red play */
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-bounce);
  position: relative;
  z-index: 1; /* lower than iframe */
  pointer-events: none; /* 不要阻擋 iframe 點擊 */
}

.play-button::before {
  content: "";
  display: block;
  width: 0;
  height: 0;
  border-left: 20px solid #fff;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  margin-left: 3px;
}

.play-button:hover {
  transform: scale(1.1);
  box-shadow: var(--glow-neon), var(--shadow-elevated);
}

.video-title {
  position: absolute;
  bottom: 20px;
  left: 20px;
  right: 20px;
  color: var(--text-primary);
  font-size: 1.2rem;
  font-weight: 600;
  text-align: left;
  z-index: 2;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
}

/* Footer */
.footer {
  text-align: center;
  padding: 1rem 0; /* 更薄 */
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: var(--section-padding);
  background: transparent;
}

.footer-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  justify-content: center;
  padding: 0.4rem 0;
}

.footer-badge {
  padding: 0.2rem 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: #e1e7ef;
  text-transform: uppercase;
}

.footer-line {
  width: 1px;
  height: 14px;
  background: rgba(255, 255, 255, 0.18);
}

.footer-copy {
  color: #cfd9e6;
  font-size: 0.9rem;
}

.footer-link {
  color: #96e7df;
  text-decoration: none;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
}

.footer-link:hover {
  text-decoration: underline;
}

.gh-icon {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero {
    padding: clamp(16px, 3.5vh, 28px) 0 clamp(2px, 0.8vh, 6px);
    min-height: auto;
    max-height: none;
  }

  .story-section {
    margin: clamp(2px, 0.8vh, 8px) auto 0;
  }

  .channel-logo {
    margin-bottom: 0.6rem; /* reduce chance of large gap on scroll relayout */
  }

  .logo-circle {
    width: 100px;
    height: 100px;
  }

  .logo-mic {
    font-size: 1.8rem;
  }

  .logo-text-top {
    font-size: 0.55rem;
  }

  .logo-text-bottom {
    font-size: 0.7rem;
  }

  .star {
    font-size: 0.9rem;
  }

  .logo-image {
    width: 100px;
    height: 100px;
  }

  .progress-section {
    margin: clamp(0.6rem, 2vw, 1rem) 0;
    padding: 1rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.6rem;
    margin-bottom: 0.8rem;
  }

  .stat-card {
    padding: 0.9rem;
  }

  .story-content {
    padding: 1.2rem 1rem;
    /* Avoid heavy blur on low-power devices which may cause paint glitches */
    backdrop-filter: none;
    background: rgba(15, 15, 35, 0.92);
    line-height: 1.7;
  }

  .story-title {
    font-size: clamp(1.6rem, 6vw, 2.2rem);
    margin-bottom: 1.2rem;
  }

  .author-info {
    margin: 1.5rem 0 2rem 0;
  }

  .author-avatar {
    width: 50px;
    height: 50px;
  }

  .author-name {
    font-size: 1rem;
  }

  .author-date {
    font-size: 0.85rem;
  }

  .story-lead {
    font-size: 1.15rem;
    margin-bottom: 1.5rem;
  }

  .story-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
  }

  /* Make quote smaller than section titles on mobile */
  .story-content .highlight-quote {
    font-size: 1.05rem;
    padding: 1.2rem 1.2rem 1.2rem 1.5rem;
    margin: 1.5rem 0;
  }

  .story-content h3 {
    font-size: 1.3rem;
    margin: 2rem 0 1rem 0;
  }

  .cta-section {
    margin-top: 0.6rem;
  }

  .cta-button {
    width: 100%;
    max-width: 280px;
    justify-content: center;
    padding: 0.9rem 1.5rem;
  }

  .particle {
    display: none;
  }

  .footer-text {
    font-size: 0.9rem;
  }

  .footer-subtitle {
    font-size: 0.8rem;
  }

  /* Video preview adjustments */
  .video-section {
    margin: 2rem 0;
  }
  .video-container {
    margin: 1rem auto;
  }
  .yt-title {
    font-size: 1rem;
  }
  .yt-watchbar {
    padding: 10px 12px;
  }
  .yt-watchbar .yt-label {
    font-size: 1rem;
  }
  .play-button {
    width: 64px;
    height: 44px;
    border-radius: 10px;
  }
}

/* Extra responsive adjustments */
@media (max-height: 800px) {
  .hero {
    padding: clamp(16px, 2.5vh, 24px) 0 clamp(2px, 0.5vh, 6px);
    max-height: none;
  }

  .story-section {
    margin: clamp(2px, 0.8vh, 8px) auto 0;
  }

  .channel-logo {
    margin-bottom: 0.4rem;
  }

  .logo-circle {
    width: 100px;
    height: 100px;
  }

  .progress-section {
    margin: clamp(0.8rem, 2vw, 1.2rem) 0;
    padding: 0.6rem;
  }

  .stats-grid {
    margin-bottom: 0.6rem;
  }

  .cta-section {
    margin-top: 0.6rem;
  }
}

/* Very low screens */
@media (max-height: 700px) {
  .hero {
    padding: clamp(12px, 1.8vh, 18px) 0 clamp(2px, 0.4vh, 4px);
    max-height: none;
  }

  .story-section {
    margin: clamp(2px, 0.6vh, 6px) auto 0;
  }

  .channel-logo {
    margin-bottom: 0.2rem;
  }

  .logo-circle {
    width: 80px;
    height: 80px;
  }

  .logo-mic {
    font-size: 1.3rem;
  }

  .progress-section {
    margin: clamp(0.6rem, 1.5vw, 1rem) 0;
    padding: 0.5rem;
  }

  .hero-title {
    font-size: clamp(1.8rem, 5vw, 3rem);
    margin-bottom: 0.3rem;
  }

  .hero-subtitle {
    font-size: clamp(0.85rem, 2.5vw, 1rem);
    margin-bottom: 0.8rem;
  }

  .cta-section {
    margin-top: 0.4rem;
  }
}

@media (max-width: 480px) {
  :root {
    --section-padding: 40px;
  }

  .story-section {
    margin: clamp(2px, 0.6vh, 6px) auto 0;
  }

  .story-content .highlight-quote {
    font-size: 1rem; /* keep below title size on very small screens */
    padding: 1rem 1rem 1rem 1.25rem;
    margin: 1.2rem 0;
  }

  .channel-logo {
    margin-bottom: 1.5rem;
  }

  .logo-circle {
    width: 100px;
    height: 100px;
  }

  .logo-mic {
    font-size: 1.5rem;
  }

  .logo-text-top {
    font-size: 0.5rem;
  }

  .logo-text-bottom {
    font-size: 0.65rem;
  }

  .star {
    font-size: 0.8rem;
  }

  .logo-image {
    width: 100px;
    height: 100px;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  /* On very small screens, keep title visible but smaller */
  .yt-topbar {
    display: flex;
  }
  .yt-title {
    font-size: 0.95rem;
  }
  .yt-watchbar .yt-label {
    font-size: 0.95rem;
  }

  /* Make article width more generous on very small screens */
  .story-content {
    padding: 1rem 0.8rem;
  }
}

/* Loading States */
.loading {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* Success Animation */
.success {
  animation: bounce 0.6s;
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

/* Scroll Animations */
@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: slideInUp 0.6s ease-out forwards;
}