/* ==========================================================
   小苍梨英语屋 · 共享样式表（全站统一）
   来源：十四类从句训练题 demo 样式抽取 + 扩展
   ========================================================== */

:root {
  --bg: #fdf8f1;
  --bg2: #ffffff;
  --ink: #2d2a26;
  --muted: #8c8279;
  --rule: #e8e0d5;
  --accent: #e8784a;
  --accent2: #3d8b7e;
  --tag-bg: #fff3ed;
  --tag-ink: #d4693c;
  --green-bg: #edf7f4;
  --green-ink: #2d6b5e;
  --yellow-bg: #fffae6;
  --yellow-ink: #8a7530;
}

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif;
  font-size: 16px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
}

/* ambient gradient overlays */
body::before {
  content: '';
  position: fixed;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 60%;
  background: radial-gradient(ellipse, rgba(232,120,74,0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}
body::after {
  content: '';
  position: fixed;
  bottom: -10%;
  left: -10%;
  width: 50%;
  height: 50%;
  background: radial-gradient(ellipse, rgba(61,139,126,0.05) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.page {
  max-width: 860px;
  margin: 0 auto;
  padding: 2.5rem 2rem 4rem;
  position: relative;
  z-index: 1;
}

a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ========== 顶部导航 ========== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(253,248,241,0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.site-nav .nav-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 0.7rem 2rem;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
}
.site-nav .nav-brand {
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--ink);
}
.site-nav .nav-brand span { color: var(--accent); }
.site-nav .nav-links {
  display: flex;
  gap: 1rem;
  margin-left: auto;
  flex-wrap: wrap;
}
.site-nav .nav-links a {
  font-size: 0.92rem;
  color: var(--muted);
  padding: 2px 4px;
}
.site-nav .nav-links a:hover { color: var(--accent); text-decoration: none; }
.site-nav .nav-links a.active { color: var(--accent); font-weight: 700; }
.site-nav .nav-crumb {
  font-size: 0.85rem;
  color: var(--muted);
}
.site-nav .nav-crumb a { color: var(--muted); }
.site-nav .nav-crumb a:hover { color: var(--accent); }

/* ========== 封面 ========== */
.cover {
  text-align: center;
  padding: 4rem 1rem 3rem;
  border-bottom: 2px solid var(--rule);
  margin-bottom: 2.5rem;
}
.cover .badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 18px;
  border-radius: 20px;
  margin-bottom: 1.2rem;
}
.cover h1 {
  font-family: Georgia, "Microsoft YaHei", serif;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.6rem;
  letter-spacing: 0.02em;
}
.cover .subtitle {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.6;
  max-width: 600px;
  margin: 0 auto;
}

/* ========== 标题 ========== */
h2 {
  font-family: Georgia, "Microsoft YaHei", serif;
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--ink);
  margin: 2.8rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--accent);
  display: inline-block;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink);
  margin: 1.8rem 0 0.8rem;
  padding-left: 0.6rem;
  border-left: 4px solid var(--accent2);
}
h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent2);
  margin: 1.2rem 0 0.5rem;
}

/* ========== 卡片 ========== */
.card {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(232,120,74,0.1);
  border-radius: 12px;
  padding: 1.5rem 1.6rem;
  margin: 1.2rem 0;
  box-shadow: 0 2px 12px rgba(232,120,74,0.04);
}
.card h4 { margin-top: 0; }

/* ========== 练习题块 ========== */
.ex-section { margin: 2.5rem 0; }
.ex-num {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  width: 32px; height: 32px;
  line-height: 32px;
  text-align: center;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.9rem;
  margin-right: 0.5rem;
  vertical-align: middle;
}
.ex-title {
  display: inline-block;
  font-size: 1.15rem;
  font-weight: 700;
  vertical-align: middle;
}
.ex-desc {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0.4rem 0 1rem 2.5rem;
}

/* 题目项 */
.q-item {
  background: var(--bg2);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  margin: 0.8rem 0;
}
.q-item .q-label {
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}
.q-item .q-text {
  font-size: 1rem;
  line-height: 1.7;
}
.blank {
  display: inline-block;
  min-width: 80px;
  border-bottom: 2px dashed var(--accent);
  margin: 0 4px;
  padding: 0 6px;
  color: var(--muted);
  font-style: italic;
}
.highlight {
  background: var(--yellow-bg);
  padding: 1px 6px;
  border-radius: 3px;
  font-weight: 600;
}

/* 选项 */
.opts {
  margin-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.opts span {
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 4px 14px;
  font-size: 0.9rem;
  cursor: default;
  transition: all 0.15s;
}
.opts span:hover {
  background: var(--tag-bg);
  border-color: var(--accent);
}

/* 配对双栏 */
.match-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 0.8rem 0;
}
.match-left, .match-right {
  flex: 1;
  min-width: 240px;
}
.match-item {
  background: var(--bg2);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  margin: 0.4rem 0;
  font-size: 0.92rem;
}

/* 对话 */
.dialogue {
  background: var(--bg2);
  border-left: 4px solid var(--accent2);
  border-radius: 0 10px 10px 0;
  padding: 1.2rem 1.5rem;
  margin: 1rem 0;
  line-height: 2;
}
.dialogue .spk {
  font-weight: 700;
  color: var(--accent2);
  margin-right: 0.5rem;
}

/* 提示框 */
.tip-box {
  background: var(--yellow-bg);
  border: 1px solid rgba(138,117,48,0.2);
  border-radius: 10px;
  padding: 1rem 1.3rem;
  margin: 1.2rem 0;
  font-size: 0.93rem;
  color: var(--yellow-ink);
}
.tip-box strong { color: var(--ink); }

.teacher-note {
  background: var(--green-bg);
  border: 1px solid rgba(45,107,94,0.2);
  border-radius: 10px;
  padding: 1.2rem 1.5rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  color: var(--green-ink);
  line-height: 1.85;
}
.teacher-note strong { color: var(--ink); }

/* 标签 */
.tag {
  display: inline-block;
  background: var(--tag-bg);
  color: var(--tag-ink);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 12px;
  margin: 2px 3px;
}
.tag.green {
  background: var(--green-bg);
  color: var(--green-ink);
}

/* ========== 答案区 ========== */
.answer-section {
  margin: 2rem 0;
  padding: 1.5rem;
  background: rgba(255,255,255,0.6);
  border: 1px solid var(--rule);
  border-radius: 12px;
}
.answer-toggle {
  display: inline-block;
  background: var(--accent2);
  color: #fff;
  padding: 6px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  margin: 0.5rem 0;
  transition: opacity 0.2s;
}
.answer-toggle:hover { opacity: 0.85; }
.answer-content {
  display: none;
  margin-top: 1rem;
}
.answer-content.show { display: block; }
.answer-item {
  padding: 0.6rem 0;
  border-bottom: 1px dotted var(--rule);
}
.answer-item:last-child { border-bottom: none; }
.answer-item .a-num {
  font-weight: 700;
  color: var(--accent2);
  margin-right: 0.5rem;
}
.ans-keyword {
  background: var(--yellow-bg);
  padding: 1px 5px;
  border-radius: 3px;
  font-weight: 600;
}

/* 分隔线 */
hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 2.5rem 0;
}

/* 方法论正文 */
.method-prose {
  font-size: 1.02rem;
  line-height: 1.9;
}
.method-prose p { margin: 1rem 0; }
.method-prose blockquote {
  background: var(--green-bg);
  border-left: 4px solid var(--accent2);
  margin: 1.2rem 0;
  padding: 1rem 1.3rem;
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: var(--green-ink);
}
.method-prose .big-idea {
  background: var(--tag-bg);
  border: 2px solid var(--accent);
  border-radius: 12px;
  padding: 1.3rem 1.5rem;
  margin: 1.5rem 0;
  font-size: 1.08rem;
  font-weight: 600;
  text-align: center;
}
.circuit-label {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 3px 14px;
  border-radius: 14px;
  font-size: 0.82rem;
  font-weight: 700;
  margin-right: 0.4rem;
}
.circuit-label.green { background: var(--accent2); }

/* ========== 完成进度 ========== */
.done-btn {
  display: inline-block;
  background: transparent;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  padding: 5px 18px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  margin: 0.5rem 0;
  transition: all 0.2s;
}
.done-btn:hover { background: var(--tag-bg); }
.done-btn.is-done {
  background: var(--accent2);
  border-color: var(--accent2);
  color: #fff;
}
.done-bar {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin: 1rem 0;
}
.done-bar .bar {
  flex: 1;
  height: 8px;
  background: var(--rule);
  border-radius: 4px;
  overflow: hidden;
}
.done-bar .bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 4px;
  transition: width 0.4s;
}
.done-bar .bar-text {
  font-size: 0.85rem;
  color: var(--muted);
  white-space: nowrap;
}

/* ========== 主页 ========== */
.hero {
  text-align: center;
  padding: 3.5rem 1rem 2.5rem;
}
.hero h1 {
  font-family: Georgia, "Microsoft YaHei", serif;
  font-size: 2.6rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
}
.hero h1 .accent { color: var(--accent); }
.hero .subtitle {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.2rem;
  margin: 2rem 0;
}
.module-card {
  display: block;
  background: rgba(255,255,255,0.8);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 1.4rem 1.5rem;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.module-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(232,120,74,0.1);
  text-decoration: none;
  border-color: rgba(232,120,74,0.4);
}
.module-card .m-icon {
  font-size: 1.6rem;
  margin-bottom: 0.6rem;
}
.module-card h3 {
  border: none;
  padding: 0;
  margin: 0 0 0.4rem;
  color: var(--ink);
}
.module-card p {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}
.module-card .m-count {
  display: inline-block;
  margin-top: 0.8rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent2);
  background: var(--green-bg);
  padding: 2px 10px;
  border-radius: 12px;
}
.module-card .m-coming {
  display: inline-block;
  margin-top: 0.8rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--bg);
  padding: 2px 10px;
  border-radius: 12px;
}
.module-card .m-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 4px;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width 0.4s;
}

/* 音频播放器 */
.audio-player {
  margin: 1rem 0;
}
.audio-player audio { width: 100%; }
.audio-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.3rem;
}

/* 阅读文章 */
.passage {
  background: var(--bg2);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.6rem 1.8rem;
  margin: 1.2rem 0;
  line-height: 2;
  font-size: 1rem;
}
.passage h4 { margin-bottom: 0.6rem; }
.passage p { margin: 0.9rem 0; text-indent: 2em; }

/* 页脚 */
footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
}

/* 长内容防溢出 */
.q-text, .match-item, .dialogue p, .passage p, .answer-item, .subtitle, .tip-box, .teacher-note {
  overflow-wrap: break-word;
}

/* 回到顶部 */
.to-top {
  position: fixed;
  right: 1.2rem;
  bottom: 1.5rem;
  z-index: 20;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 44px;
  text-align: center;
  padding: 0;
  box-shadow: 0 4px 14px rgba(232,120,74,0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.to-top.show { opacity: 0.92; pointer-events: auto; }

/* ========== 响应式 ========== */
@media (max-width: 700px) {
  .page { padding: 1.5rem 1rem 3rem; }
  .site-nav .nav-inner { padding: 0.6rem 1rem; gap: 0.8rem; }
  .site-nav .nav-crumb { display: none; }
  .site-nav .nav-brand { font-size: 0.95rem; }
  .site-nav .nav-links { margin-left: 0; gap: 0.6rem; row-gap: 0.1rem; }
  .site-nav .nav-links a { font-size: 0.82rem; }
  .cover { padding: 3rem 1rem 2rem; margin-bottom: 1.8rem; }
  .cover h1 { font-size: 1.8rem; }
  .hero { padding: 2.5rem 1rem 2rem; }
  .hero h1 { font-size: 2rem; }
  h2 { font-size: 1.4rem; margin: 2.2rem 0 0.8rem; }
  .ex-desc { margin: 0.4rem 0 1rem 0.3rem; }
  .match-row { flex-direction: column; }
  .opts { flex-direction: column; gap: 0.3rem; }
  .card { padding: 1rem; }
  .passage { padding: 1.1rem 1rem; }
  .answer-section { padding: 1rem; }
  .dialogue { padding: 1rem 1.1rem; }
  .done-bar { flex-wrap: wrap; }
  .done-bar .bar-text { white-space: normal; }
  .blank { min-width: 60px; }
  .module-grid { grid-template-columns: 1fr; }
  .to-top { right: 1rem; bottom: 1.2rem; width: 40px; height: 40px; line-height: 40px; }
}

@media print {
  body { background: #fff; }
  .page { max-width: 100%; }
  .answer-content { display: block !important; }
  .answer-toggle { display: none; }
  .site-nav { display: none; }
  .done-btn { display: none; }
  .to-top { display: none; }
}