/* ============================================================
   新华字典 (Xinhua Dictionary) - 典雅新中式视觉规范
   ============================================================ */

:root {
  --bg-main: #f8f6f0;
  --bg-card: #ffffff;
  --bg-subtle: #f2eee6;
  --bg-grid-line: #e2d9cd;
  --border-color: #e4dcce;
  --border-dark: #b8ac9a;
  
  --ink-primary: #272c30;
  --ink-secondary: #575e65;
  --ink-muted: #8b9299;
  
  --cinnabar: #b83b2e;
  --cinnabar-hover: #9c2e22;
  --cinnabar-light: #fbeee9;
  --cinnabar-border: #f2c7be;
  
  --bamboo: #2b7054;
  --bamboo-light: #edf6f2;
  --bamboo-border: #c4e3d5;

  --amber: #b07d2b;
  --amber-light: #fbf5ea;

  --shadow-sm: 0 2px 6px rgba(43, 39, 35, 0.05);
  --shadow-md: 0 4px 16px rgba(43, 39, 35, 0.08);
  --shadow-lg: 0 10px 30px rgba(43, 39, 35, 0.12);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --font-serif: "Songti SC", "Noto Serif SC", "STSong", "Source Han Serif SC", SimSun, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
}

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

body {
  background-color: var(--bg-main);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  background-image: radial-gradient(#ebe3d5 1px, transparent 1px);
  background-size: 24px 24px;
}

body.lookup-modal-open {
  overflow: hidden;
}

/* 顶部导航栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 246, 240, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 1.5rem;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.bookshelf-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--ink-secondary);
  font-size: 0.84rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}

.bookshelf-back:hover {
  background: var(--cinnabar-light);
  border-color: var(--cinnabar);
  color: var(--cinnabar);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  user-select: none;
  text-decoration: none;
}

.brand-seal {
  width: 38px;
  height: 38px;
  background: var(--cinnabar);
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(184, 59, 46, 0.35);
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--ink-primary);
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--ink-muted);
  letter-spacing: 1px;
}

/* 搜索框 */
.search-wrapper {
  position: relative;
  flex: 1;
  max-width: 480px;
}

.search-input-box {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 0.4rem 0.8rem;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.search-input-box:focus-within {
  border-color: var(--cinnabar);
  box-shadow: 0 0 0 3px var(--cinnabar-light);
}

.search-icon {
  color: var(--ink-muted);
  font-size: 1rem;
  margin-right: 0.5rem;
}

.search-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 0.95rem;
  color: var(--ink-primary);
}

.search-clear-btn {
  background: none;
  border: none;
  color: var(--ink-muted);
  cursor: pointer;
  padding: 2px;
  display: none;
  font-size: 0.9rem;
}

.search-clear-btn:hover {
  color: var(--ink-primary);
}

/* 搜索下拉联想框 */
.search-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 380px;
  overflow-y: auto;
  display: none;
  z-index: 100;
}

.search-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  cursor: pointer;
  border-bottom: 1px solid var(--bg-subtle);
  transition: background 0.15s;
}

.search-item:last-child {
  border-bottom: none;
}

.search-item:hover, .search-item.active {
  background: var(--bg-subtle);
}

.search-item-char {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cinnabar);
  margin-right: 0.75rem;
}

.search-item-pinyin {
  font-size: 0.9rem;
  color: var(--ink-secondary);
  font-weight: 600;
}

.search-item-meta {
  font-size: 0.8rem;
  color: var(--ink-muted);
}

/* 顶部操作按钮 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--ink-primary);
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}

.nav-btn:hover {
  border-color: var(--cinnabar);
  color: var(--cinnabar);
  background: var(--cinnabar-light);
}

.nav-btn.primary {
  background: var(--cinnabar);
  color: #fff;
  border-color: var(--cinnabar);
}

.nav-btn.primary:hover {
  background: var(--cinnabar-hover);
}

/* 主内容区域 */
.main-content {
  max-width: 1200px;
  margin: 1.5rem auto;
  padding: 0 1.25rem 3rem;
}

.dict-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 1.75rem;
  align-items: start;
}

/* 左侧：字形展示与笔画引擎 */
.char-visual-column {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* 米字格/田字格画布容器 */
.canvas-card {
  position: relative;
  width: 240px;
  height: 240px;
  margin: 0 auto;
  border: 2px solid var(--cinnabar);
  border-radius: var(--radius-md);
  background-color: #fff;
  overflow: hidden;
  box-shadow: inset 0 0 10px rgba(184, 59, 46, 0.08);
}

/* 米字格背景 */
.grid-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.grid-lines.mi-zi-ge {
  background-image: 
    linear-gradient(to right, transparent 49.5%, var(--border-dark) 49.5%, var(--border-dark) 50.5%, transparent 50.5%),
    linear-gradient(to bottom, transparent 49.5%, var(--border-dark) 49.5%, var(--border-dark) 50.5%, transparent 50.5%),
    linear-gradient(45deg, transparent 49.6%, rgba(184, 172, 154, 0.5) 49.6%, rgba(184, 172, 154, 0.5) 50.4%, transparent 50.4%),
    linear-gradient(-45deg, transparent 49.6%, rgba(184, 172, 154, 0.5) 49.6%, rgba(184, 172, 154, 0.5) 50.4%, transparent 50.4%);
}

.grid-lines.tian-zi-ge {
  background-image: 
    linear-gradient(to right, transparent 49.5%, var(--border-dark) 49.5%, var(--border-dark) 50.5%, transparent 50.5%),
    linear-gradient(to bottom, transparent 49.5%, var(--border-dark) 49.5%, var(--border-dark) 50.5%, transparent 50.5%);
}

.grid-lines.none {
  background: transparent;
}

#hanzi-writer-target {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
}

/* 动图控制栏 */
.writer-controls {
  width: 100%;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.controls-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.btn-ctrl {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--ink-primary);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.btn-ctrl:hover {
  background: var(--cinnabar-light);
  color: var(--cinnabar);
  border-color: var(--cinnabar-border);
}

.btn-ctrl.active {
  background: var(--cinnabar);
  color: #fff;
  border-color: var(--cinnabar);
}

/* 练字打分提示 */
.quiz-feedback-box {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  text-align: center;
  background: var(--bg-subtle);
  color: var(--ink-secondary);
  display: none;
}

.quiz-feedback-box.success {
  display: block;
  background: var(--bamboo-light);
  color: var(--bamboo);
  border: 1px solid var(--bamboo-border);
}

.quiz-feedback-box.mistake {
  display: block;
  background: var(--cinnabar-light);
  color: var(--cinnabar);
  border: 1px solid var(--cinnabar-border);
}

/* 下方：逐笔拆解区域 (Step-by-step breakdown) */
.breakdown-section {
  width: 100%;
  margin-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.25rem;
}

.breakdown-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.breakdown-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.breakdown-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 7px;
  background: var(--cinnabar-light);
  color: var(--cinnabar);
  border-radius: var(--radius-full);
}

/* 逐笔卡片列表网格 */
.stroke-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.6rem;
  width: 100%;
}

.stroke-step-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.2rem;
  cursor: pointer;
  transition: all 0.2s;
  user-select: none;
}

/* 笔画骨架屏加载占位 */
.stroke-step-card.skeleton {
  cursor: default;
  border-color: var(--border-color);
  background: var(--bg-subtle);
  animation: pulseShimmer 1.2s infinite ease-in-out;
}

@keyframes pulseShimmer {
  0% { opacity: 0.45; }
  50% { opacity: 0.85; }
  100% { opacity: 0.45; }
}

.mini-grid.skeleton-box {
  background: #ebe5db;
  border-color: #ddd4c6;
  background-image: none;
}

.skeleton-text {
  width: 34px;
  height: 9px;
  background: #dfd6c8;
  border-radius: 4px;
  margin-top: 5px;
}

.stroke-step-card:hover {
  border-color: var(--cinnabar);
  background: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.stroke-step-card.active {
  border-color: var(--cinnabar);
  background: var(--cinnabar-light);
}

.mini-grid {
  width: 54px;
  height: 54px;
  border: 1px solid #d4c8b8;
  position: relative;
  background: #fff;
  background-image: 
    linear-gradient(to right, transparent 48%, #e8e0d5 48%, #e8e0d5 52%, transparent 52%),
    linear-gradient(to bottom, transparent 48%, #e8e0d5 48%, #e8e0d5 52%, transparent 52%),
    linear-gradient(45deg, transparent 48.5%, #f1ece4 48.5%, #f1ece4 51.5%, transparent 51.5%),
    linear-gradient(-45deg, transparent 48.5%, #f1ece4 48.5%, #f1ece4 51.5%, transparent 51.5%);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  overflow: hidden;
}

.mini-grid svg {
  width: 100%;
  height: 100%;
}

.step-num {
  font-size: 0.7rem;
  color: var(--ink-muted);
  margin-top: 0.3rem;
}

.step-name {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--cinnabar);
  margin-top: 1px;
}

/* 右侧：字典详细条目面板 */
.char-detail-column {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow-sm);
}

/* 顶部字头发音与徽章 */
.entry-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.head-char-group {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
}

.main-char {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--cinnabar);
  line-height: 1;
}

.main-pinyin-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.main-pinyin {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--ink-primary);
  font-family: var(--font-sans);
}

.audio-btn {
  background: var(--bamboo-light);
  border: 1px solid var(--bamboo-border);
  color: var(--bamboo);
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.95rem;
}

.audio-btn:hover {
  background: var(--bamboo);
  color: #fff;
  transform: scale(1.05);
}

/* 多音字标签栏 */
.polyphone-tags {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

.poly-badge {
  font-size: 0.8rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
  color: var(--ink-secondary);
  border: 1px solid var(--border-color);
  cursor: pointer;
}

.poly-badge.active {
  background: var(--cinnabar);
  color: #fff;
  border-color: var(--cinnabar);
}

/* 汉字属性药丸矩阵 */
.char-meta-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.75rem;
  margin: 1.25rem 0;
  background: var(--bg-subtle);
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.meta-item {
  display: flex;
  flex-direction: column;
}

.meta-label {
  font-size: 0.76rem;
  color: var(--ink-muted);
  font-weight: 500;
  margin-bottom: 2px;
}

.meta-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.meta-value.highlight {
  color: var(--cinnabar);
}

/* 释义与扩展章节 */
.section-block {
  margin-top: 1.5rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink-primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-left: 3px solid var(--cinnabar);
  padding-left: 0.6rem;
}

/* 同音字胶囊列表 */
.homophones-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.homophone-chip {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  width: 40px;
  height: 40px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--ink-primary);
}

.homophone-chip:hover {
  border-color: var(--cinnabar);
  color: var(--cinnabar);
  background: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* 常用组词胶囊 */
.words-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.word-chip {
  font-size: 0.9rem;
  padding: 0.35rem 0.8rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--ink-primary);
  cursor: pointer;
  transition: all 0.15s;
}

.word-chip:hover {
  background: var(--bamboo-light);
  color: var(--bamboo);
  border-color: var(--bamboo-border);
}

/* 字典详细释义正文 */
.explanation-body {
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--ink-primary);
  white-space: pre-wrap;
  background: #fff;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  font-family: var(--font-sans);
}

/* 新华字典式检字弹窗：固定步骤栏 + 单页下钻 */
.drawer-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 28px;
  background: rgba(32, 28, 24, 0.58);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index: 300;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

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

.side-drawer {
  position: relative;
  width: min(900px, calc(100vw - 56px));
  height: min(720px, calc(100vh - 56px));
  min-height: 520px;
  overflow: hidden;
  background-color: #fbf8f1;
  background-image:
    linear-gradient(rgba(132, 99, 59, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(132, 99, 59, 0.018) 1px, transparent 1px);
  background-size: 20px 20px;
  border: 1px solid rgba(126, 91, 54, 0.42);
  border-radius: 12px;
  box-shadow: 0 30px 90px rgba(21, 17, 13, 0.34), 0 2px 8px rgba(21, 17, 13, 0.18);
  z-index: 301;
  display: flex;
  flex-direction: column;
  transform: translateY(18px) scale(0.975);
  opacity: 0;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
  will-change: transform;
}

.drawer-overlay.active .side-drawer {
  transform: translateY(0) scale(1);
  opacity: 1;
}

/* 弹窗顶部：书名式标题与固定步骤导航 */
.drawer-header {
  position: relative;
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr) 140px;
  align-items: start;
  padding: 1.3rem 1.5rem 1.15rem;
  background: rgba(255, 253, 248, 0.94);
  border-bottom: 1px solid #dacdbb;
  flex-shrink: 0;
  gap: 1rem;
}

.drawer-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: rgba(184, 59, 46, 0.22);
}

.drawer-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.8rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-secondary);
  cursor: pointer;
  transition: all 0.15s;
  justify-self: start;
  margin-top: 1.2rem;
}

.drawer-back-btn:hover {
  background: var(--cinnabar-light);
  border-color: var(--cinnabar);
  color: var(--cinnabar);
}

.drawer-back-btn.hidden {
  visibility: hidden;
  pointer-events: none;
}

.drawer-back-btn .back-arrow {
  font-size: 1.2rem;
  line-height: 1;
  font-weight: 700;
  margin-top: -1px;
}

.drawer-title-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

.drawer-kicker {
  color: var(--cinnabar);
  font-family: var(--font-serif);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  margin-bottom: 0.15rem;
}

.drawer-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--ink-primary);
  margin: 0;
  letter-spacing: 0.14em;
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.drawer-breadcrumbs {
  width: min(520px, 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin-top: 0.85rem;
}

.drawer-breadcrumbs .crumb {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  white-space: nowrap;
  transition: all 0.15s;
}

.drawer-breadcrumbs .crumb > span {
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #bdb3a5;
  border-radius: 50%;
  font-family: Georgia, serif;
  background: #fffdf8;
}

.drawer-breadcrumbs .crumb:hover {
  color: var(--cinnabar);
}

.drawer-breadcrumbs .crumb.active {
  color: var(--cinnabar);
  font-weight: 700;
}

.drawer-breadcrumbs .crumb.active > span {
  color: #fff;
  border-color: var(--cinnabar);
  background: var(--cinnabar);
  box-shadow: 0 2px 6px rgba(184, 59, 46, 0.2);
}

.drawer-breadcrumbs .crumb.complete {
  color: var(--bamboo);
}

.drawer-breadcrumbs .crumb.complete > span {
  color: transparent;
  border-color: var(--bamboo);
  background: var(--bamboo);
  position: relative;
}

.drawer-breadcrumbs .crumb.complete > span::after {
  content: "✓";
  position: absolute;
  color: #fff;
  font-family: var(--font-sans);
  font-weight: 700;
}

.drawer-breadcrumbs .crumb-line {
  width: clamp(20px, 5vw, 62px);
  height: 1px;
  margin: 0 0.65rem;
  background: #c9c0b4;
}

.drawer-close-btn {
  background: none;
  border: none;
  font-size: 1.35rem;
  color: var(--ink-muted);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  line-height: 1;
  transition: all 0.15s;
  justify-self: end;
  margin-top: 1rem;
  border-radius: var(--radius-sm);
}

.drawer-close-btn:hover {
  color: var(--cinnabar);
  background: var(--cinnabar-light);
}

/* 当前步骤独占内容视口，纵向滚动被限制在弹窗内 */
.drawer-viewport {
  flex: 1;
  overflow: hidden;
  position: relative;
  width: 100%;
}

.drawer-track {
  display: flex;
  width: 300%;
  height: 100%;
  transition: transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
  will-change: transform;
}

.drawer-pane {
  width: 33.333333%;
  height: 100%;
  overflow-y: auto;
  padding: 1.35rem 2rem 2rem;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* 步骤引导横条 */
.pane-instruction {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: rgba(255, 253, 248, 0.84);
  border: 0;
  border-left: 3px solid var(--cinnabar);
  border-radius: 0;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.pane-step-badge {
  background: transparent;
  color: var(--cinnabar);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0;
  border-radius: 0;
}

.pane-step-text {
  font-weight: 600;
  color: var(--ink-primary);
}

/* 步骤吸顶头 */
.pane-sticky-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #fbf8f1;
  padding-bottom: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

/* 下钻卡片通用样式 (Drill-Down Cards) */
.drill-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.18s;
  box-shadow: var(--shadow-sm);
  user-select: none;
}

.drill-card:hover {
  border-color: var(--cinnabar);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  background: #fffdfb;
}

.drill-card:active {
  transform: translateY(0);
}

.drill-card .drill-chevron {
  font-size: 1.15rem;
  color: var(--border-dark);
  font-weight: 700;
  transition: transform 0.15s, color 0.15s;
}

.drill-card:hover .drill-chevron {
  color: var(--cinnabar);
  transform: translateX(2px);
}

/* 笔画卡片网格 (部首步骤 1) */
.drawer-stroke-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}

.stroke-drill-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.1rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.18s;
  box-shadow: var(--shadow-sm);
  user-select: none;
  width: 100%;
  color: inherit;
  font: inherit;
  text-align: left;
}

.stroke-drill-card:hover {
  border-color: var(--cinnabar);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  background: #fffdfb;
}

.stroke-drill-card .stroke-main {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.stroke-drill-card .stroke-number {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.stroke-drill-card .stroke-count-sub {
  font-size: 0.8rem;
  color: var(--ink-muted);
}

.stroke-drill-card .drill-chevron {
  font-size: 1.15rem;
  color: var(--border-dark);
  font-weight: 700;
  transition: all 0.15s;
}

.stroke-drill-card:hover .drill-chevron {
  color: var(--cinnabar);
  transform: translateX(2px);
}

/* 部首卡片网格 (部首步骤 2) */
.drawer-radicals-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
}

.radical-drill-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  padding: 0.75rem 0.85rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.18s;
  box-shadow: var(--shadow-sm);
  user-select: none;
  width: 100%;
  color: inherit;
  font: inherit;
  text-align: left;
}

.radical-drill-card:hover {
  border-color: var(--cinnabar);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  background: #fffdfb;
}

.radical-drill-card .rad-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  align-items: center;
  gap: 0.5rem;
}

.radical-drill-card .rad-char {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--ink-primary);
  line-height: 1;
}

.radical-drill-card .rad-sub {
  font-size: 0.75rem;
  color: var(--ink-muted);
}

.radical-drill-card .drill-chevron {
  font-size: 1.1rem;
  color: var(--border-dark);
  font-weight: 700;
  transition: all 0.15s;
}

.radical-drill-card:hover .drill-chevron {
  color: var(--cinnabar);
  transform: translateX(2px);
}

/* 声母卡片网格 (拼音步骤 1) */
.drawer-shengmu-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.75rem;
}

.shengmu-drill-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  min-height: 82px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.18s;
  box-shadow: var(--shadow-sm);
  user-select: none;
  width: 100%;
  color: inherit;
  font: inherit;
  text-align: left;
}

.shengmu-drill-card:hover {
  border-color: var(--cinnabar);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  background: #fffdfb;
}

.shengmu-drill-card .sm-letter {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.shengmu-drill-card .sm-sub {
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.shengmu-drill-card .drill-chevron {
  font-size: 1.15rem;
  color: var(--border-dark);
  font-weight: 700;
  transition: all 0.15s;
}

.shengmu-drill-card:hover .drill-chevron {
  color: var(--cinnabar);
  transform: translateX(2px);
}

/* 韵母卡片网格 (拼音步骤 2) */
.drawer-yunmu-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}

.yunmu-drill-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  min-height: 76px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.18s;
  box-shadow: var(--shadow-sm);
  user-select: none;
  width: 100%;
  color: inherit;
  font: inherit;
  text-align: left;
}

.yunmu-drill-card:hover {
  border-color: var(--cinnabar);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  background: #fffdfb;
}

.yunmu-drill-card .ym-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.yunmu-drill-card .ym-sub {
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.yunmu-drill-card .drill-chevron {
  font-size: 1.15rem;
  color: var(--border-dark);
  font-weight: 700;
  transition: all 0.15s;
}

.yunmu-drill-card:hover .drill-chevron {
  color: var(--cinnabar);
  transform: translateX(2px);
}

/* 剩余笔画筛选说明与胶囊行 (步骤 3) */
.filter-instruction {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
  padding: 0.65rem 0.85rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.instruction-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ink-secondary);
  white-space: nowrap;
  margin-top: 4px;
}

.extra-stroke-pills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.subfilter-pill-btn {
  font-size: 0.82rem;
  padding: 0.35rem 0.85rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--ink-secondary);
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

.subfilter-pill-btn:hover {
  border-color: var(--bamboo);
  color: var(--bamboo);
  background: var(--bamboo-light);
}

.subfilter-pill-btn.active {
  background: var(--bamboo);
  color: #fff;
  border-color: var(--bamboo);
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(43, 112, 84, 0.25);
}

/* 检字流式汉字展示区 */
.guided-results-flow {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* 按分类分组卡片 */
.group-section {
  padding-bottom: 1.25rem;
  border-bottom: 1px dashed var(--border-color);
}

.group-section:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.group-section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--cinnabar);
  margin-bottom: 0.75rem;
  padding-left: 0.5rem;
  border-left: 3px solid var(--cinnabar);
}

.group-section-count {
  font-size: 0.8rem;
  font-weight: normal;
  color: var(--ink-muted);
}

.tone-subblock {
  margin-top: 0.5rem;
  margin-bottom: 0.75rem;
}

.tone-subblock-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-muted);
  margin-bottom: 0.4rem;
  padding-left: 2px;
}

.char-chips-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.char-chip {
  position: relative;
  font-family: var(--font-serif);
  font-size: 1.3rem;
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
  box-shadow: var(--shadow-sm);
}

.char-chip:hover {
  background: var(--cinnabar-light);
  color: var(--cinnabar);
  border-color: var(--cinnabar);
  transform: scale(1.1);
  z-index: 2;
  box-shadow: var(--shadow-md);
}

/* 响应式适配 */
@media (max-width: 880px) {
  .dict-layout {
    grid-template-columns: 1fr;
  }
  .char-visual-column {
    margin-bottom: 1rem;
  }
  .search-wrapper {
    max-width: 100%;
  }
  .header-container {
    flex-wrap: wrap;
  }
  .header-actions {
    order: 2;
    width: 100%;
    min-width: 0;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    touch-action: pan-x;
    padding-bottom: 2px;
  }
  .header-actions::-webkit-scrollbar {
    display: none;
  }
  .header-actions .nav-btn {
    flex: 0 0 auto;
    min-height: 38px;
    border-radius: var(--radius-sm);
    white-space: nowrap;
  }
  .search-wrapper {
    order: 3;
    width: 100%;
  }
  .drawer-overlay {
    place-items: end center;
    padding: 0;
  }
  .side-drawer {
    width: 100vw;
    height: min(88vh, 760px);
    min-height: 0;
    border-radius: 16px 16px 0 0;
    border-bottom: 0;
    transform: translateY(100%);
  }
  .drawer-overlay.active .side-drawer {
    transform: translateY(0);
  }
  .drawer-header {
    grid-template-columns: 64px minmax(0, 1fr) 64px;
    padding: 0.95rem 0.8rem 0.85rem;
    gap: 0.25rem;
  }
  .drawer-title {
    font-size: 1.35rem;
  }
  .drawer-kicker {
    display: none;
  }
  .drawer-back-btn {
    width: 42px;
    height: 38px;
    padding: 0;
    justify-content: center;
    margin-top: 0;
  }
  .drawer-back-btn .back-text {
    display: none;
  }
  .drawer-close-btn {
    margin-top: 0;
  }
  .drawer-breadcrumbs {
    margin-top: 0.65rem;
    font-size: 0.7rem;
  }
  .drawer-breadcrumbs .crumb {
    gap: 0.2rem;
  }
  .drawer-breadcrumbs .crumb > span {
    width: 21px;
    height: 21px;
  }
  .drawer-breadcrumbs .crumb-line {
    width: 12px;
    margin: 0 0.25rem;
  }
  .drawer-pane {
    padding: 1rem;
    gap: 0.75rem;
  }
  .drawer-stroke-grid,
  .drawer-yunmu-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .drawer-radicals-grid,
  .drawer-shengmu-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .radical-drill-card,
  .shengmu-drill-card {
    min-height: 72px;
  }
}

@media (max-width: 480px) {
  .drawer-breadcrumbs .crumb {
    font-size: 0;
  }
  .drawer-breadcrumbs .crumb > span {
    font-size: 0.72rem;
  }
  .drawer-breadcrumbs .crumb-line {
    width: clamp(24px, 12vw, 48px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .drawer-overlay,
  .side-drawer,
  .drawer-track {
    transition-duration: 0.01ms;
  }
}