:root {
  --bg-deep: #050508;
  --bg-dark: #0d0d16;
  --cyber-pink: #ff007a;
  --cyber-blue: #00f0ff;
  --cyber-purple: #7000ff;
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.3);
  --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-mid: 0.4s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: transparent; /* 设为透明，让底层的背景图显示出来 */
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text-primary);
}

/* 动态背景 */
.bg-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  /* 增加背景图片层，background.jpg */
  background: 
    linear-gradient(rgba(5, 5, 8, 0.55), rgba(5, 5, 8, 0.65)), /* 调整遮罩透明度，让图更显眼 */
    url('./images/background.jpg') center/cover no-repeat, /* 背景图相对路径 */
    radial-gradient(circle at center, #1a1a2e 0%, #050508 100%); /* 兜底渐变 */
  overflow: hidden;
}

.scanline {
  position: absolute;
  width: 100%;
  height: 2px;
  background: rgba(0, 240, 255, 0.03);
  top: 0;
  animation: scanline 8s linear infinite;
  z-index: 10;
}

@keyframes scanline {
  0% { top: -5%; }
  100% { top: 105%; }
}

.glow-spot {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.2;
  z-index: 1;
}

.spot-1 {
  width: 400px;
  height: 400px;
  background: var(--cyber-purple);
  top: -100px;
  right: -100px;
  animation: drift 15s ease-in-out infinite alternate;
}

.spot-2 {
  width: 300px;
  height: 300px;
  background: var(--cyber-blue);
  bottom: -50px;
  left: -50px;
  animation: drift 12s ease-in-out infinite alternate-reverse;
}

@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-50px, 50px) scale(1.2); }
}

/* 核心容器 */
#app {
  width: 100%;
  height: 100%;
  position: relative;
}

.screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
  transform: translateY(20px) scale(0.98);
}

.screen.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

/* 1. 开场页 */
.poem-lines {
  text-align: center;
  margin-bottom: 40px;
}

.poem-line {
  font-size: 1.4rem;
  line-height: 2.5;
  color: var(--text-secondary);
  opacity: 0;
  filter: blur(10px);
  transform: translateY(10px);
  transition: all 1.6s ease; /* 调整为 1.6s，节奏更紧凑 */
  letter-spacing: 0.15em;
}

.poem-line.visible {
  opacity: 1;
  filter: blur(0);
  transform: translateY(0);
  color: var(--text-primary);
}

.action-area {
  display: flex;
  justify-content: center;
  width: 100%;
  transition: opacity 1s ease;
}

.action-area.hide {
  opacity: 0;
  pointer-events: none;
}

/* 赛博按钮 */
.cyber-btn {
  position: relative;
  padding: 16px 40px;
  background: transparent;
  border: 1px solid var(--cyber-blue);
  color: var(--cyber-blue);
  font-size: 1.1rem;
  font-weight: bold;
  letter-spacing: 2px;
  cursor: pointer;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

.cyber-btn:hover {
  background: var(--cyber-blue);
  color: var(--bg-deep);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
}

/* 2. 答题页 */
.topbar {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  padding: 40px 40px 0;
  z-index: 100;
}

.progress-container {
  max-width: 600px;
  margin: 0 auto;
}

#progress-text {
  font-size: 0.8rem;
  color: var(--cyber-blue);
  letter-spacing: 2px;
  margin-bottom: 10px;
  display: block;
}

.progress-bar-wrap {
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(to right, var(--cyber-blue), var(--cyber-purple));
  box-shadow: 0 0 10px var(--cyber-blue);
  transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.quiz-container {
  width: 100%;
  max-width: 800px;
  text-align: center;
  margin-top: 60px;
}

.question-header {
  margin-bottom: 50px;
}

.glitch-text {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 15px;
  position: relative;
}

#question-desc {
  color: var(--text-secondary);
  font-size: 1rem;
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  width: 100%;
}

.option-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  padding: 30px 20px;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.1rem;
  backdrop-filter: blur(5px);
}

.option-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--cyber-blue);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.option-card.selected {
  background: var(--cyber-blue);
  color: var(--bg-deep);
  border-color: var(--cyber-blue);
  font-weight: bold;
}

/* 3. 最终页 */
.result-header {
  text-align: center;
  margin-bottom: 50px;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  width: 100%;
  max-width: 1000px;
  margin-bottom: 60px;
  max-height: 50vh;
  overflow-y: auto;
  padding: 20px;
}

.char-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  padding: 20px;
  text-align: center;
  transition: all 0.4s ease;
  animation: cardAppear 0.8s backwards;
}

@keyframes cardAppear {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.char-item img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin-bottom: 15px;
  border: 2px solid var(--cyber-blue);
  padding: 4px;
}

.char-item h4 {
  margin-bottom: 5px;
  font-size: 1.1rem;
}

.char-item p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.secondary-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--text-secondary);
  padding: 12px 30px;
  border-radius: 30px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.secondary-btn:hover {
  border-color: #fff;
  color: #fff;
}

/* 解锁弹窗 */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
}

.modal.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-overlay {
  position: absolute;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
}

.unlock-card-container {
  position: relative;
  z-index: 2;
  perspective: 1000px;
  transform: scale(0.8);
  transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal.active .unlock-card-container {
  transform: scale(1);
}

.unlock-card {
  width: 340px;
  background: var(--bg-dark);
  border: 1px solid var(--cyber-blue);
  border-radius: 20px;
  padding: 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 50px rgba(0, 240, 255, 0.2);
}

.card-glow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, transparent, rgba(0, 240, 255, 0.1), transparent);
  animation: cardGlow 3s linear infinite;
}

@keyframes cardGlow {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.unlock-tag {
  font-size: 0.7rem;
  letter-spacing: 3px;
  color: var(--cyber-blue);
  margin-bottom: 30px;
}

.char-avatar-box {
  width: 120px;
  height: 120px;
  margin: 0 auto 30px;
  position: relative;
}

.avatar-frame {
  position: absolute;
  top: -10%;
  left: -10%;
  width: 120%;
  height: 120%;
  border: 1px dashed var(--cyber-blue);
  border-radius: 50%;
  animation: rotate 10s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

#unlock-avatar {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--cyber-blue);
}

.char-info h3 {
  font-size: 1.8rem;
  margin-bottom: 10px;
  background: linear-gradient(to bottom, #fff, #aaa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.char-title {
  color: var(--cyber-blue);
  font-size: 0.9rem;
  margin-bottom: 20px;
  font-weight: bold;
}

.char-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 40px;
}

/* 移动端适配 */
@media (max-width: 600px) {
  .glitch-text { font-size: 1.6rem; }
  .poem-line { font-size: 1.1rem; }
  .options-grid { grid-template-columns: 1fr; }
  .unlock-card { width: 90vw; padding: 30px 20px; }
  .topbar { padding: 30px 20px 0; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
}

.particles {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 2;
}

.particle {
  position: absolute;
  background: #fff;
  border-radius: 50%;
  pointer-events: none;
}

@keyframes float {
  0% { transform: translateY(0) rotate(0); opacity: 0; }
  20% { opacity: 0.5; }
  100% { transform: translateY(-100vh) rotate(360deg); opacity: 0; }
}

@keyframes fadeInOut {
  0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(0.95); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.05); }
}

.pulse-icon {
  width: 10px;
  height: 10px;
  background: var(--cyber-blue);
  border-radius: 50%;
  margin: 0 auto 15px;
  box-shadow: 0 0 15px var(--cyber-blue);
}

/* 占位图生成 (仅限无图时) */
img:not([src]), img[src=""] {
  background: var(--glass-bg);
  position: relative;
}
img:not([src])::after {
  content: 'ID';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  color: var(--cyber-blue);
}