/* ===== 词门拼图 — 全局样式 ===== */
:root {
  --c-yellow: #FFD93D;
  --c-green: #6BCB77;
  --c-blue: #4D96FF;
  --c-pink: #FF6B6B;
  --c-bg: #FFF8E7;
  --c-card: #FFFFFF;
  --c-text: #2D2D2D;
  --c-text-light: #777;
  --c-shadow: rgba(0,0,0,0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --font-title: 'Kalam', 'Comic Neue', 'Patrick Hand', -apple-system, "PingFang SC", "Microsoft YaHei", cursive, sans-serif;
  --font-body: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-hand: 'Patrick Hand', 'Kalam', 'Comic Neue', cursive, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-body);
  background: var(--c-bg);
  color: var(--c-text);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* 纸张纹理背景 — 手绘质感 */
.page-bg {
  position: fixed; inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(255,217,61,0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(107,203,119,0.12) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(77,150,255,0.08) 0%, transparent 50%),
    repeating-linear-gradient(
      0deg,
      transparent 0px, transparent 2px,
      rgba(255,217,61,0.03) 2px, rgba(255,217,61,0.03) 4px
    );
  pointer-events: none;
  z-index: 0;
}

/* 蜡笔描边阴影 — 关键词用 */
.crayon-shadow {
  display: inline-block;
  position: relative;
  text-shadow:
    2px 2px 0 rgba(255,217,61,0.3),
    -1px -1px 0 rgba(255,217,61,0.15);
  transform: rotate(var(--crayon-rot, -0.5deg));
}

.crayon-outline {
  position: relative;
}
.crayon-outline::after {
  content: '';
  position: absolute;
  inset: -3px;
  border: 2px solid rgba(255,217,61,0.25);
  border-radius: 6px;
  pointer-events: none;
}

/* ===== 首页 ===== */
.main-header {
  text-align: center;
  padding: 40px 20px 20px;
  position: relative;
  z-index: 1;
}

.title-glitch {
  font-family: var(--font-title);
  font-size: 2.8rem;
  background: linear-gradient(135deg, var(--c-yellow), var(--c-green), var(--c-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
  text-shadow: none;
  animation: titlePulse 3s ease-in-out infinite;
  transform: rotate(-0.5deg);
  display: inline-block;
}

@keyframes titlePulse {
  0%,100% { transform: scale(1) rotate(-0.5deg); }
  50% { transform: scale(1.03) rotate(0.5deg); }
}

.subtitle {
  color: var(--c-text-light);
  font-size: 1.1rem;
  margin-top: 8px;
  font-family: var(--font-hand);
  letter-spacing: 1px;
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  padding: 30px 20px 40px;
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.home-card {
  background: var(--c-card);
  border-radius: var(--radius);
  padding: 28px 20px;
  box-shadow: 0 4px 20px var(--c-shadow);
  border-top: 4px solid var(--card-accent, var(--c-yellow));
  transition: transform 0.2s, box-shadow 0.2s;
  position: relative;
  text-align: center;
  overflow: hidden;
}

.home-card::before {
  content: '';
  position: absolute;
  top: -30px; right: -30px;
  width: 60px; height: 60px;
  background: var(--card-accent, var(--c-yellow));
  opacity: 0.08;
  border-radius: 50%;
  pointer-events: none;
}

.home-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.home-card:active {
  transform: translateY(-2px) scale(0.98);
}

.card-icon {
  font-size: 2.8rem;
  margin-bottom: 12px;
  display: inline-block;
  animation: iconBounce 2s ease-in-out infinite;
}

.home-card:nth-child(1) .card-icon { animation-delay: 0s; }
.home-card:nth-child(2) .card-icon { animation-delay: 0.3s; }
.home-card:nth-child(3) .card-icon { animation-delay: 0.6s; }
.home-card:nth-child(4) .card-icon { animation-delay: 0.9s; }

@keyframes iconBounce {
  0%,100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-6px) rotate(3deg); }
}

.home-card h2 {
  font-size: 1.3rem;
  margin-bottom: 8px;
  color: var(--c-text);
  font-family: var(--font-title);
  transform: rotate(-0.3deg);
}

.home-card p {
  font-size: 0.9rem;
  color: var(--c-text-light);
  line-height: 1.5;
}

.card-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--card-accent, var(--c-yellow));
  color: #fff;
  font-size: 0.7rem;
  font-weight: bold;
  padding: 2px 8px;
  border-radius: 20px;
  font-family: var(--font-hand);
  transform: rotate(2deg);
}

.main-footer {
  text-align: center;
  padding: 20px;
  color: var(--c-text-light);
  font-size: 0.9rem;
  position: relative;
  z-index: 1;
  font-family: var(--font-hand);
  letter-spacing: 1px;
}

/* ===== 通用组件 ===== */
.page-wrap {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  position: relative;
  z-index: 1;
}

.back-link {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--c-blue);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s;
}

.back-link:hover {
  transform: translateX(-4px);
}

.game-header {
  text-align: center;
  margin-bottom: 24px;
}

.game-header h2 {
  font-size: 1.8rem;
  background: linear-gradient(135deg, var(--c-yellow), var(--c-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: var(--font-title);
  transform: rotate(-0.5deg);
}

.btn {
  display: inline-block;
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  font-family: var(--font-body);
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  pointer-events: none;
}

.btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn:active {
  transform: scale(0.96);
}

.btn-yellow { background: var(--c-yellow); color: #fff; }
.btn-green { background: var(--c-green); color: #fff; }
.btn-blue { background: var(--c-blue); color: #fff; }
.btn-pink { background: var(--c-pink); color: #fff; }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ===== 纸屑粒子 ===== */
.confetti-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
}

.confetti-piece {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  animation: confettiFall 1.5s ease-out forwards;
}

@keyframes confettiFall {
  0% { opacity: 1; transform: translateY(0) rotate(0deg) scale(1); }
  100% { opacity: 0; transform: translateY(400px) rotate(720deg) scale(0.3); }
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--c-text);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  z-index: 1000;
  animation: toastIn 0.3s ease-out;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

@keyframes toastIn {
  0% { opacity: 0; transform: translateX(-50%) translateY(-20px); }
  100% { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ===== 小火车 ===== */
.train-track {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 8px 0;
}

.train {
  display: flex;
  align-items: center;
  gap: 4px;
  transition: transform 0.5s ease;
}

.train-engine {
  font-size: 1.6rem;
  line-height: 1;
  position: relative;
}

/* 蒸汽粒子 */
.train-engine::after {
  content: '💨';
  position: absolute;
  top: -12px;
  left: 50%;
  font-size: 0.6rem;
  opacity: 0;
  animation: steamPuff 1.5s ease-out infinite;
  pointer-events: none;
}

@keyframes steamPuff {
  0% { opacity: 0.6; transform: translate(-50%, 0) scale(0.5); }
  100% { opacity: 0; transform: translate(-50%, -20px) scale(1.5); }
}

.train-car {
  width: 16px;
  height: 12px;
  border-radius: 3px;
  opacity: 0.3;
  transition: opacity 0.3s;
}

.train-car.active { opacity: 1; }

.train-car.c-yellow { background: var(--c-yellow); }
.train-car.c-green { background: var(--c-green); }
.train-car.c-blue { background: var(--c-blue); }
.train-car.c-pink { background: var(--c-pink); }

/* ===== 响应式 ===== */
@media (max-width: 600px) {
  .title-glitch { font-size: 2rem; }
  .home-grid { grid-template-columns: 1fr; padding: 20px 16px; }
  .page-wrap { padding: 16px; }
}