/* 五子棋小课堂 —— 糖果乐园风 */
:root {
  --cream: #fff6e5;
  --paper: #fffdf7;
  --ink: #4a3728;
  --wood: #e8b96f;
  --wood-dark: #c99b53;
  --red: #ff6b6b;
  --red-dark: #e85555;
  --blue: #5bc0eb;
  --green: #7bc950;
  --yellow: #ffd166;
  --purple: #b388eb;
  --shadow: 0 6px 0 rgba(74, 55, 40, 0.15);
  --radius: 24px;
}

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

body {
  font-family: "ZCOOL KuaiLe", "PingFang SC", "Hiragino Sans GB", sans-serif;
  background: var(--cream);
  background-image:
    radial-gradient(circle at 15% 20%, rgba(255, 209, 102, 0.18) 0 120px, transparent 120px),
    radial-gradient(circle at 85% 70%, rgba(91, 192, 235, 0.14) 0 160px, transparent 160px),
    radial-gradient(circle at 70% 15%, rgba(255, 107, 107, 0.10) 0 100px, transparent 100px);
  color: var(--ink);
  min-height: 100vh;
  letter-spacing: 0.04em;
}

/* ---------- 导航 ---------- */
.nav {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 16px 24px;
  background: var(--paper);
  border-bottom: 4px dashed var(--yellow);
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav .logo {
  font-size: 26px;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
}
.nav .logo span { color: var(--red); }
.nav a.navlink {
  text-decoration: none;
  color: var(--ink);
  background: var(--cream);
  padding: 8px 16px;
  border-radius: 999px;
  border: 2px solid transparent;
  font-size: 17px;
  transition: transform 0.15s, border-color 0.15s;
}
.nav a.navlink:hover { transform: translateY(-3px) rotate(-2deg); border-color: var(--yellow); }
.nav a.navlink.active { background: var(--yellow); border-color: var(--wood-dark); }

.wrap { max-width: 960px; margin: 0 auto; padding: 32px 20px 80px; }

/* ---------- 标题 ---------- */
h1.page-title {
  font-size: clamp(30px, 5vw, 44px);
  text-align: center;
  margin: 16px 0 8px;
}
h1.page-title em { font-style: normal; color: var(--red); }
.page-sub { text-align: center; font-size: 19px; color: #8a6f55; margin-bottom: 36px; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--paper);
  border-radius: var(--radius);
  border: 3px solid var(--ink);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 32px;
}
.card h2 {
  font-size: 26px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.card h2 .badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--yellow);
  border: 3px solid var(--ink);
  font-size: 20px;
  flex-shrink: 0;
}
.card p, .card li { font-size: 19px; line-height: 1.9; }
.card ul { padding-left: 28px; }
.card .tip {
  margin-top: 16px;
  background: var(--cream);
  border: 2px dashed var(--wood-dark);
  border-radius: 16px;
  padding: 14px 18px;
  font-size: 18px;
}
.card .tip::before { content: "💡 "; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  font-family: inherit;
  font-size: 20px;
  letter-spacing: 0.06em;
  color: #fff;
  background: var(--red);
  border: 3px solid var(--ink);
  border-radius: 999px;
  padding: 12px 30px;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 5px 0 var(--ink);
  transition: transform 0.1s, box-shadow 0.1s;
}
.btn:hover { transform: translateY(2px); box-shadow: 0 3px 0 var(--ink); }
.btn:active { transform: translateY(5px); box-shadow: 0 0 0 var(--ink); }
.btn.blue { background: var(--blue); }
.btn.green { background: var(--green); }
.btn.small { font-size: 16px; padding: 8px 20px; }

/* ---------- 首页 hero ---------- */
.hero { text-align: center; padding: 48px 16px 24px; }
.hero h1 {
  font-size: clamp(36px, 7vw, 64px);
  line-height: 1.3;
  animation: pop-in 0.6s ease both;
}
.hero h1 .stone-emoji { display: inline-block; animation: bounce 2s ease-in-out infinite; }
.hero p {
  font-size: 22px;
  color: #8a6f55;
  margin: 18px 0 30px;
  animation: pop-in 0.6s 0.15s ease both;
}
.hero .btn { animation: pop-in 0.6s 0.3s ease both; }

@keyframes pop-in {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to { opacity: 1; transform: none; }
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------- 进阶之路地图 ---------- */
.path-map { position: relative; margin-top: 24px; }
.path-step {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--paper);
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px 24px;
  margin: 0 auto 18px;
  max-width: 620px;
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.15s;
  animation: pop-in 0.5s ease both;
}
.path-step:nth-child(odd) { transform: rotate(-1deg); }
.path-step:nth-child(even) { transform: rotate(1deg); }
.path-step:hover { transform: scale(1.04) rotate(0deg); }
.path-step .step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  border: 3px solid var(--ink);
  flex-shrink: 0;
  color: #fff;
}
.path-step h3 { font-size: 22px; margin-bottom: 4px; }
.path-step p { font-size: 16px; color: #8a6f55; }
.path-step .go { margin-left: auto; font-size: 28px; }

/* ---------- 棋盘 ---------- */
.board-box { display: flex; flex-direction: column; align-items: center; gap: 16px; }
canvas.board {
  border: 4px solid var(--ink);
  border-radius: 12px;
  box-shadow: var(--shadow);
  background: var(--wood);
  max-width: 100%;
  touch-action: manipulation;
}
.board-caption { font-size: 18px; text-align: center; min-height: 1.5em; }
.board-caption.good { color: var(--green); }
.board-caption.bad { color: var(--red-dark); }

/* ---------- 练习题 ---------- */
.quiz-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.quiz-item { text-align: center; }
.quiz-item h3 { font-size: 20px; margin-bottom: 12px; }

/* ---------- 对弈控制 ---------- */
.play-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 20px;
}
.play-status {
  text-align: center;
  font-size: 24px;
  margin-bottom: 16px;
  min-height: 1.5em;
}
.play-status .win { color: var(--green); }
.play-status .lose { color: var(--red-dark); }

/* ---------- 心理课表情卡 ---------- */
.mood-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.mood-card {
  background: var(--paper);
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  text-align: center;
  transition: transform 0.15s;
}
.mood-card:hover { transform: translateY(-6px) rotate(-1deg); }
.mood-card .face { font-size: 56px; display: block; margin-bottom: 12px; }
.mood-card h3 { font-size: 21px; margin-bottom: 8px; }
.mood-card p { font-size: 17px; line-height: 1.8; color: #6e5640; }

/* ---------- 页脚 ---------- */
.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 40px; }
footer {
  text-align: center;
  padding: 24px;
  font-size: 16px;
  color: #a08868;
}

@media (max-width: 600px) {
  .nav { padding: 12px; gap: 8px; }
  .nav a.navlink { font-size: 15px; padding: 6px 12px; }
  .card { padding: 20px; }
}