/* ═══════════════════════════════════════════════
   LexiQuiz — 温馨可爱儿童风格样式表 v2
═══════════════════════════════════════════════ */

/* Google Fonts — 圆润可爱字体 */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&family=Baloo+2:wght@700;800&display=swap');

/* ─── 设计变量 ─── */
:root {
  /* 温暖配色 */
  --peach:      #FFBB8A;
  --peach-light:#FFF0E0;
  --coral:      #FF7B54;
  --yellow:     #FFD166;
  --mint:       #8FE3CF;
  --mint-light: #E0F9F3;
  --lavender:   #C5A8FF;
  --lavender-light: #F0EAFF;
  --sky:        #A8D8EA;
  --rose:       #FF9FB2;

  --text:       #4A3728;
  --text-light: #7A6358;
  --white:      #FFFEF9;

  --card-bg:    rgba(255,254,249,0.88);
  --card-border: rgba(255,187,138,0.4);
  --shadow:     0 8px 30px rgba(255,123,84,0.15);
  --radius:     24px;
}

/* ─── 全局 ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Nunito', sans-serif;
  background-color: #FFF8F0;
  background-image: url('bg.png'); /* bg.png lives at css/bg.png */
  background-size: 700px auto;
  background-repeat: repeat;
  background-attachment: fixed;
  min-height: 100vh;
  color: var(--text);
  font-size: 17px;
  line-height: 1.7;
}

/* 整体半透明遮罩，让背景柔和不抢眼 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: rgba(255,248,240,0.6);
  z-index: 0;
  pointer-events: none;
}
/* 内容层在遮罩上方 */
.nav, .container, .hero, footer { position: relative; z-index: 1; }

/* ─── 顶部导航 ─── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 36px;
  background: rgba(255,254,249,0.9);
  backdrop-filter: blur(10px);
  border-bottom: 3px solid var(--peach);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 16px rgba(255,123,84,0.12);
}
.nav-logo {
  font-family: 'Baloo 2', cursive;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--coral);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.nav-tagline {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light);
  background: var(--peach-light);
  padding: 4px 14px;
  border-radius: 100px;
  border: 2px solid var(--peach);
}

/* ─── 容器 ─── */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 36px 20px 60px;
}

/* ─── 白色卡片 ─── */
.card {
  background: var(--card-bg);
  border: 2.5px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
  margin-bottom: 22px;
  backdrop-filter: blur(12px);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(255,123,84,0.22);
}

/* ─── 首页 Hero ─── */
.hero {
  text-align: center;
  padding: 70px 20px 50px;
}
.hero-badge {
  display: inline-block;
  background: var(--yellow);
  color: var(--text);
  padding: 6px 20px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 800;
  margin-bottom: 20px;
  border: 2px solid rgba(0,0,0,0.08);
  box-shadow: 0 3px 0 rgba(0,0,0,0.08);
}
.hero h1 {
  font-family: 'Baloo 2', cursive;
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  color: var(--coral);
  line-height: 1.2;
  margin-bottom: 16px;
  text-shadow: 3px 3px 0 rgba(255,187,138,0.5);
}
.hero p {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 540px;
  margin: 0 auto 32px;
  font-weight: 600;
}

/* ─── 按钮 ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  font-family: 'Nunito', sans-serif;
  font-size: 1.05rem;
  font-weight: 800;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-decoration: none;
  letter-spacing: 0.01em;
}
.btn-primary {
  background: linear-gradient(135deg, var(--coral), #FF9F6B);
  color: #fff;
  box-shadow: 0 5px 0 #C85A3A, 0 8px 20px rgba(255,123,84,0.35);
}
.btn-primary:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 8px 0 #C85A3A, 0 12px 28px rgba(255,123,84,0.5);
}
.btn-primary:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #C85A3A;
}
.btn-secondary {
  background: var(--white);
  color: var(--text);
  border: 2.5px solid var(--peach);
  box-shadow: 0 3px 0 var(--peach);
}
.btn-secondary:hover {
  background: var(--peach-light);
  transform: translateY(-2px);
}

/* ─── 蓝思等级表格 ─── */
.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  margin-top: 24px;
}
.level-item {
  background: var(--peach-light);
  border: 2px solid var(--peach);
  border-radius: 18px;
  padding: 16px 10px;
  text-align: center;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: default;
}
.level-item:hover {
  background: var(--peach);
  transform: translateY(-4px) scale(1.03);
  border-color: var(--coral);
}
.level-lexile {
  font-size: 1rem;
  font-weight: 900;
  color: var(--coral);
  display: block;
  font-family: 'Baloo 2', cursive;
}
.level-grade {
  font-size: 0.72rem;
  color: var(--text-light);
  margin-top: 4px;
  font-weight: 700;
}

/* ─── Section 标题 ─── */
.section-title {
  font-family: 'Baloo 2', cursive;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--coral);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ─── 测评页 — 进度条 ─── */
.progress-wrapper { margin-bottom: 24px; }
.progress-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  color: var(--text-light);
  font-weight: 700;
  margin-bottom: 8px;
}
.progress-bar {
  width: 100%;
  height: 14px;
  background: rgba(255,187,138,0.3);
  border-radius: 100px;
  border: 2px solid var(--peach);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--coral), var(--yellow));
  border-radius: 100px;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.level-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: 100px;
  border: 2px solid var(--lavender);
  background: var(--lavender-light);
  color: #7B5EA7;
}

/* ─── 测评页 — 文章区 ─── */
.passage-card {
  background: rgba(255,254,249,0.92);
  border: 2.5px solid var(--mint);
  border-radius: var(--radius);
  padding: 36px 38px 38px;
  margin-bottom: 22px;
  box-shadow: 0 6px 20px rgba(143,227,207,0.3);
  position: relative;
}
.passage-card::before {
  content: '📖';
  position: absolute;
  top: -18px;
  left: 22px;
  font-size: 2.2rem;
  filter: drop-shadow(2px 3px 0 rgba(0,0,0,0.1));
}
#article-title {
  font-family: 'Baloo 2', cursive;
  font-size: 1.9rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--coral);
  margin-top: 6px;
}
#article-body {
  font-size: 1.5rem;
  line-height: 2.1;
  color: var(--text);
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* ─── 测评页 — 题目 ─── */
#question-text {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px dashed var(--peach);
  color: var(--text);
}

.options-grid {
  display: grid;
  gap: 12px;
  margin-bottom: 22px;
}

.option-btn {
  width: 100%;
  text-align: left;
  padding: 15px 20px;
  border-radius: 16px;
  border: 2.5px solid var(--peach);
  background: var(--peach-light);
  color: var(--text);
  font-family: 'Nunito', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.18s cubic-bezier(0.34, 1.56, 0.64, 1);
  line-height: 1.5;
  box-shadow: 0 3px 0 rgba(255,123,84,0.2);
}
.option-btn:hover:not(:disabled) {
  background: var(--peach);
  border-color: var(--coral);
  transform: translateX(6px) scale(1.02);
  box-shadow: 0 4px 0 rgba(255,123,84,0.35);
}
.option-btn.selected {
  background: var(--sky);
  border-color: #5BA8C4;
  color: #1E6686;
  box-shadow: 0 4px 0 rgba(91,168,196,0.4);
}
.option-btn.correct {
  background: var(--mint-light);
  border-color: #3DB89A;
  color: #1A7A63;
  box-shadow: 0 4px 0 rgba(61,184,154,0.3);
}
.option-btn.wrong {
  background: #FFE0E6;
  border-color: var(--rose);
  color: #C0385A;
  box-shadow: 0 4px 0 rgba(255,159,178,0.3);
}
.option-btn:disabled { cursor: default; transform: none; }

/* ─── 反馈提示 ─── */
.feedback {
  padding: 14px 18px;
  border-radius: 14px;
  margin-bottom: 18px;
  font-size: 1rem;
  font-weight: 800;
  animation: bounceIn 0.35s ease;
}
.feedback-correct {
  background: var(--mint-light);
  border: 2px solid #3DB89A;
  color: #1A7A63;
}
.feedback-wrong {
  background: #FFE0E6;
  border: 2px solid var(--rose);
  color: #C0385A;
}

.submit-row { text-align: right; }
#submit-btn {
  padding: 13px 32px;
  border-radius: 100px;
  border: none;
  background: linear-gradient(135deg, var(--coral), #FF9F6B);
  color: #fff;
  font-family: 'Nunito', sans-serif;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 0 #C85A3A, 0 6px 16px rgba(255,123,84,0.3);
}
#submit-btn:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: 0 7px 0 #C85A3A, 0 10px 24px rgba(255,123,84,0.45);
}
#submit-btn:active:not(:disabled) {
  transform: translateY(1px);
  box-shadow: 0 2px 0 #C85A3A;
}
#submit-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* ─── 结果页 ─── */
.result-hero {
  text-align: center;
  padding: 40px 24px;
}
.result-score-label {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 8px;
}
.result-score {
  font-family: 'Baloo 2', cursive;
  font-size: clamp(3.5rem, 10vw, 5.5rem);
  font-weight: 800;
  color: var(--coral);
  line-height: 1;
  text-shadow: 4px 4px 0 rgba(255,187,138,0.6);
  animation: bounceIn 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
.result-range {
  font-size: 1rem;
  color: var(--text-light);
  margin-top: 8px;
  font-weight: 700;
}
.result-grade {
  margin-top: 16px;
  font-size: 1.15rem;
  font-weight: 800;
  color: #7B5EA7;
  background: var(--lavender-light);
  display: inline-block;
  padding: 6px 20px;
  border-radius: 100px;
  border: 2px solid var(--lavender);
}
.result-emoji { font-size: 3rem; display: block; margin-bottom: 10px; }

/* 准确率统计 */
.accuracy-row {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-top: 24px;
  flex-wrap: wrap;
}
.stat-box {
  text-align: center;
  background: var(--peach-light);
  border: 2px solid var(--peach);
  border-radius: 18px;
  padding: 12px 22px;
  min-width: 80px;
}
.stat-number {
  font-family: 'Baloo 2', cursive;
  font-size: 2rem;
  font-weight: 800;
  color: var(--coral);
  display: block;
}
.stat-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-light);
}

/* 书单卡片 */
.book-list { list-style: none; }
.book-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 2px dashed rgba(255,187,138,0.5);
}
.book-item:last-child { border-bottom: none; }
.book-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
  width: 44px;
  text-align: center;
}
.book-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text);
}
.book-author {
  font-size: 0.82rem;
  color: var(--text-light);
  font-weight: 600;
}
.book-note {
  font-size: 0.8rem;
  color: #3DB89A;
  font-weight: 700;
  margin-top: 2px;
}
.target-books .book-title { color: #7B5EA7; }
.target-books .book-note  { color: var(--coral); }

/* ─── 历程点 ─── */
.path-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 20px;
}
.path-dot {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 800;
}
.path-dot.correct { background: var(--mint-light); border: 2.5px solid #3DB89A; color: #1A7A63; }
.path-dot.wrong   { background: #FFE0E6; border: 2.5px solid var(--rose); color: #C0385A; }
.path-arrow { color: var(--peach); font-size: 1.1rem; font-weight: 900; }

/* ─── 小提示 ─── */
.tip-box {
  background: var(--mint-light);
  border: 2px solid var(--mint);
  border-radius: 16px;
  padding: 14px 20px;
  font-size: 0.9rem;
  font-weight: 700;
  color: #2A7A6A;
  margin-top: 20px;
}
.tip-box strong { color: var(--coral); }

/* ─── 动画 ─── */
@keyframes bounceIn {
  0%   { opacity: 0; transform: scale(0.5); }
  60%  { opacity: 1; transform: scale(1.08); }
  100% { transform: scale(1); }
}
.fade-in { animation: bounceIn 0.5s ease both; }

/* ─── Feature 卡片（首页） ─── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
  margin-top: 8px;
}
.feature-item {
  background: var(--peach-light);
  border: 2px solid var(--peach);
  border-radius: 20px;
  padding: 20px 16px;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: default;
}
.feature-item:hover {
  background: var(--peach);
  border-color: var(--coral);
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 8px 20px rgba(255,123,84,0.25);
}
.feature-icon { font-size: 2.2rem; margin-bottom: 10px; }
.feature-title { font-weight: 800; margin-bottom: 6px; font-size: 1rem; color: var(--text); }
.feature-desc { font-size: 0.82rem; color: var(--text-light); line-height: 1.6; font-weight: 600; }

/* Steps */
.steps-list { list-style: none; counter-reset: steps; }
.steps-list li {
  counter-increment: steps;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 2px dashed rgba(255,187,138,0.5);
}
.steps-list li:last-child { border-bottom: none; }
.steps-list li::before {
  content: counter(steps);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--coral), #FF9F6B);
  color: #fff;
  font-weight: 900;
  font-size: 0.9rem;
  flex-shrink: 0;
  box-shadow: 0 3px 0 #C85A3A;
}
.steps-list li strong { display: block; margin-bottom: 2px; font-size: 1rem; }
.steps-list li span { font-size: 0.85rem; color: var(--text-light); font-weight: 600; }

/* ─── 响应式 ─── */
@media (max-width: 600px) {
  .nav { padding: 12px 16px; }
  .container { padding: 20px 12px 50px; }
  .card { padding: 20px 16px; }
  .hero { padding: 48px 14px 36px; }
  .passage-card { padding: 22px 16px; }
  #article-body { font-size: 1rem; }
}