/* ══════════════════════════════════════════════════════════════
   沪上呼呼·藕粉非遗 — 全局样式表
   主题色：藕粉 #F7E1D7 / 米白 #FBF8F5 / 棕茶 #8B7355 / 浅金 #D4B98C
   ══════════════════════════════════════════════════════════════ */

/* ── CSS Custom Properties ──────────────────────────────────── */
:root {
  --primary: #F7E1D7;      /* 藕粉色 */
  --bg: #FBF8F5;           /* 米白底 */
  --accent: #8B7355;       /* 棕茶色 */
  --gold: #D4B98C;         /* 浅金色 */
  --text: #5C4A3E;         /* 深褐 */
  --title: #222222;        /* 标题色 */
  --white: #FFFFFF;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --radius: 12px;
  --fs-title: 19px;
  --fs-content: 17px;
}

/* ── Global Reset ───────────────────────────────────────────── */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ── Body Base ──────────────────────────────────────────────── */
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: var(--fs-content);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── App Container ──────────────────────────────────────────── */
#app {
  padding-bottom: 60px;   /* avoid tab bar overlap */
  min-height: 100vh;
}

/* ── Page Placeholder (for skeleton loading) ───────────────── */
.page-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  font-size: 16px;
  color: var(--accent);
}

/* ── Bottom Fixed Tab Bar ───────────────────────────────────── */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: row;
  height: 50px;
  background: var(--white);
  border-top: 1px solid #eee;
  z-index: 1000;
}

.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  cursor: pointer;
  color: var(--text);
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.tab-item.active {
  color: var(--gold);
}

.tab-icon {
  font-size: 22px;
  line-height: 1;
}

.tab-label {
  font-size: 10px;
  margin-top: 2px;
  line-height: 1;
}

/* ══════════════════════════════════════════════════════════════
   首页 (#home) 专属样式
   ══════════════════════════════════════════════════════════════ */

/* ── Banner 区 ──────────────────────────────────────────────── */
.home-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 20px;
  background: linear-gradient(135deg, #F7E1D7 0%, #FBF8F5 50%, #F7E1D7 100%);
  border-radius: 0 0 24px 24px;
  min-height: 160px;
}

.banner-content {
  flex: 1;
}

.banner-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 6px;
  line-height: 1.3;
}

.banner-subtitle {
  font-size: var(--fs-content);
  color: var(--accent);
  margin-bottom: 14px;
}

.banner-btn {
  display: inline-block;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--white);
  background: linear-gradient(135deg, var(--gold) 0%, #C4A87C 100%);
  border-radius: 20px;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(212, 185, 140, 0.4);
  transition: transform 0.2s;
}

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

.banner-image img {
  width: 140px;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  margin-left: 12px;
}

/* ── 6 核心入口 (3×2 网格) ─────────────────────────────────── */
.home-entrances {
  padding: 16px 0 8px;
}

.entrance-scroll {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 0 16px;
}

.entrance-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: var(--text);
  gap: 6px;
  -webkit-tap-highlight-color: transparent;
}

.entrance-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--white);
  box-shadow: var(--shadow);
  font-size: 24px;
  transition: transform 0.2s;
}

.entrance-item:active .entrance-icon {
  transform: scale(0.92);
}

.entrance-label {
  font-size: var(--fs-content);
  color: var(--accent);
  white-space: nowrap;
}

/* ── 通用 Section 头部 ──────────────────────────────────────── */
.home-section {
  padding: 16px 20px 8px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.section-title {
  font-size: var(--fs-title);
  font-weight: 700;
  color: var(--title);
}

.section-more {
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
}

/* ── 发现藕粉 (2×2 Grid) ───────────────────────────────────── */
.discover-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.discover-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.discover-card:active {
  transform: scale(0.97);
}

.discover-card-img-wrap {
  position: relative;
  overflow: hidden;
}

.discover-card-img-wrap img {
  width: 100%;
  height: 100px;
  object-fit: cover;
  display: block;
}

.discover-card-fav {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.85);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #e74c3c;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
  transition: transform 0.2s, background 0.2s;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  padding: 0;
}

.discover-card-fav:active {
  transform: scale(0.85);
  background: rgba(255, 255, 255, 0.95);
}

.card-info {
  padding: 8px 10px 10px;
}

.card-info h3 {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--title);
  margin-bottom: 2px;
}

.card-info p {
  font-size: var(--fs-content);
  color: var(--accent);
  line-height: 1.4;
}

/* ── 大师专栏 ────────────────────────────────────────────────── */
.master-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--white);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow);
}

.master-avatar {
  flex-shrink: 0;
}

.master-avatar img {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--gold);
}

.master-info {
  flex: 1;
  min-width: 0;
}

.master-info h3 {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--title);
  margin-bottom: 4px;
}

.master-info p {
  font-size: var(--fs-content);
  color: var(--accent);
  line-height: 1.5;
  margin-bottom: 6px;
}

.master-link {
  font-size: 12px;
  color: var(--gold);
  text-decoration: none;
  font-weight: 500;
}

/* ── 最新作品 (横向滚动) ────────────────────────────────────── */
.works-scroll {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 4px;
}

.works-scroll::-webkit-scrollbar {
  display: none;
}

.works-card {
  flex: 0 0 auto;
  width: 150px;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.works-card:active {
  transform: scale(0.97);
}

.works-card img {
  width: 100%;
  height: 110px;
  object-fit: cover;
  display: block;
}

.works-info {
  padding: 8px 10px 10px;
}

.works-info h3 {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--title);
  margin-bottom: 2px;
}

.works-info span {
  font-size: var(--fs-content);
  color: var(--accent);
}

/* ══════════════════════════════════════════════════════════════
   非遗文化页 (#culture) 专属样式
   ══════════════════════════════════════════════════════════════ */

/* ── 文化页 Banner ──────────────────────────────────────────── */
.culture-banner {
  padding: 32px 20px 24px;
  text-align: center;
  background: linear-gradient(135deg, #F7E1D7 0%, #FBF8F5 50%, #F7E1D7 100%);
}

.culture-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 6px;
}

.culture-subtitle {
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 16px;
}

.culture-divider {
  display: flex;
  justify-content: center;
  align-items: center;
}

.culture-divider-line {
  display: inline-block;
  width: 60px;
  height: 3px;
  background: var(--gold);
  border-radius: 2px;
}

/* ── 文化 Section ────────────────────────────────────────────── */
.culture-section {
  padding: 20px 20px 8px;
}

/* ── 四大价值 2×2 Grid ─────────────────────────────────────── */
.culture-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.culture-card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--primary);
  overflow: hidden;
  transition: box-shadow 0.3s, transform 0.2s;
}

.culture-card:hover {
  box-shadow: 0 4px 16px rgba(247, 225, 215, 0.5);
}

.culture-card:active {
  transform: scale(0.97);
}

.culture-card img {
  width: 100%;
  height: 110px;
  object-fit: cover;
  display: block;
}

.culture-card-body {
  padding: 10px 12px 14px;
  text-align: center;
}

.culture-card-icon {
  font-size: 28px;
  display: block;
  margin-bottom: 4px;
}

.culture-card-title {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--title);
  margin-bottom: 4px;
}

.culture-card-desc {
  font-size: var(--fs-content);
  color: var(--accent);
  line-height: 1.5;
  margin-bottom: 10px;
  text-align: left;
}

.culture-card-btn {
  display: inline-block;
  padding: 6px 16px;
  font-size: 12px;
  font-weight: 500;
  color: var(--white);
  background: linear-gradient(135deg, var(--gold) 0%, #C4A87C 100%);
  border: none;
  border-radius: 16px;
  cursor: pointer;
  transition: transform 0.2s, opacity 0.2s;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.culture-card-btn:active {
  transform: scale(0.94);
}

/* ══════════════════════════════════════════════════════════════
   Modal / Overlay 通用样式
   ══════════════════════════════════════════════════════════════ */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 20px;
}

.modal-content {
  background: var(--white);
  border-radius: var(--radius);
  max-width: 380px;
  width: 100%;
  padding: 24px 20px 20px;
  position: relative;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.modal-close {
  position: absolute;
  top: 8px;
  right: 12px;
  font-size: 24px;
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  line-height: 1;
  padding: 4px;
  -webkit-tap-highlight-color: transparent;
}

.modal-close:active {
  opacity: 0.6;
}

.modal-title {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--title);
  margin-bottom: 14px;
  text-align: center;
}

.modal-placeholder {
  background: #f5f0eb;
  border-radius: 8px;
  padding: 40px 16px;
  text-align: center;
  font-size: var(--fs-content);
  color: var(--accent);
  line-height: 1.6;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ══════════════════════════════════════════════════════════════
   工艺教学页 (#craft) 专属样式
   ══════════════════════════════════════════════════════════════ */

/* ── 工艺页 Banner ──────────────────────────────────────────── */
.craft-banner {
  padding: 32px 20px 24px;
  text-align: center;
  background: linear-gradient(135deg, #F7E1D7 0%, #FBF8F5 50%, #F7E1D7 100%);
}

.craft-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 6px;
}

.craft-subtitle {
  font-size: var(--fs-content);
  color: var(--accent);
  margin-bottom: 16px;
}

.craft-divider {
  display: flex;
  justify-content: center;
  align-items: center;
}

.craft-divider-line {
  display: inline-block;
  width: 60px;
  height: 3px;
  background: var(--gold);
  border-radius: 2px;
}

/* ── 工艺 Section ────────────────────────────────────────────── */
.craft-section {
  padding: 20px 20px 8px;
}

/* ── 材料工具 2×2 Grid ─────────────────────────────────────── */
.craft-tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.craft-tool-item {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--primary);
  padding: 20px 12px;
  text-align: center;
  transition: box-shadow 0.3s, transform 0.2s;
}

.craft-tool-item:active {
  transform: scale(0.97);
}

.craft-tool-icon {
  font-size: 48px;
  display: block;
  margin-bottom: 10px;
  line-height: 1;
}

.craft-tool-name {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--title);
  margin-bottom: 4px;
}

.craft-tool-desc {
  font-size: var(--fs-content);
  color: var(--accent);
  line-height: 1.4;
}

/* ── 工艺特点 水平滚动 ────────────────────────────────────── */
.craft-tags-scroll {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 8px 0 12px;
}

.craft-tags-scroll::-webkit-scrollbar {
  display: none;
}

.craft-tag-item {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 72px;
}

.craft-tag-circle {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--gold);
  background: var(--white);
  transition: transform 0.2s;
}

.craft-tag-item:active .craft-tag-circle {
  transform: scale(0.92);
}

.craft-tag-label {
  font-size: 12px;
  color: var(--accent);
  text-align: center;
  white-space: nowrap;
}

/* ── 五大工序 时间线 ───────────────────────────────────────── */
.craft-timeline {
  position: relative;
  padding-left: 36px;
}

.craft-timeline::before {
  content: '';
  position: absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gold);
}

.craft-step {
  position: relative;
  margin-bottom: 28px;
}

.craft-step:last-child {
  margin-bottom: 0;
}

.craft-step-number {
  position: absolute;
  left: -28px;
  top: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--white);
  border: 2px solid var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--gold);
  z-index: 1;
}

.craft-step-body {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--primary);
  overflow: hidden;
  transition: box-shadow 0.3s;
}

.craft-step-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px 0;
}

.craft-step-icon {
  font-size: 22px;
  line-height: 1;
}

.craft-step-title {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--title);
}

.craft-step-img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  display: block;
  margin-top: 10px;
}

.craft-step-desc {
  font-size: var(--fs-content);
  color: var(--accent);
  line-height: 1.5;
  padding: 10px 14px 14px;
}

/* ══════════════════════════════════════════════════════════════
   智能伴读页 (#reading) 专属样式
   ══════════════════════════════════════════════════════════════ */

/* ── 阅读页大 Banner ───────────────────────────────────────── */
.reading-banner {
  position: relative;
  width: 100%;
  padding: 32px 20px 24px;
  background: linear-gradient(135deg, #F7E1D7 0%, #FBF8F5 50%, #F7E1D7 100%);
  text-align: center;
  overflow: hidden;
}
.reading-banner-bg {
  position: relative;
  z-index: 1;
}
.reading-banner-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--title, #5C4033);
  margin: 0 0 6px;
}
.reading-banner-desc {
  font-size: var(--fs-content);
  color: var(--accent, #A0806A);
  margin: 0;
  line-height: 1.5;
}

/* ── 阅读页 Banner 分隔线 ──────────────────────────────────── */
.reading-banner-divider {
  margin: 12px auto 0;
  width: 60px;
  height: 3px;
  background: #D4A06A;
  border-radius: 2px;
}

/* ── 分类区块（音频/视频/作品） ────────────────────────────── */
.reading-category {
  padding: 20px 20px 8px;
}
.reading-category-title {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 12px;
}
.reading-category-scroll {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
}
.reading-category-scroll::-webkit-scrollbar {
  height: 4px;
}
.reading-category-scroll::-webkit-scrollbar-thumb {
  background: var(--product-gold, #D4B98C);
  border-radius: 2px;
}

.reading-media-card {
  flex-shrink: 0;
  width: 200px;
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.reading-media-img {
  width: 100%;
  height: 130px;
  object-fit: cover;
  display: block;
}
.reading-media-info {
  padding: 10px 12px;
}
.reading-media-name {
  font-size: var(--fs-content);
  color: var(--product-dark, #5C4A3E);
  display: block;
  margin-bottom: 8px;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.reading-media-controls {
  display: flex;
  gap: 6px;
}
.reading-ctrl-btn {
  flex: 1;
  padding: 6px 8px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  text-align: center;
  color: #fff;
}
.reading-ctrl-play {
  background: var(--product-dark, #5C4A3E);
}
.reading-ctrl-dl {
  background: var(--product-gold, #D4B98C);
  color: #5C4A3E;
}
.reading-ctrl-view {
  background: var(--product-dark, #5C4A3E);
}

/* ── 隔代亲子小指引 ────────────────────────────────────────── */
.reading-tips {
  padding: 8px 20px 24px;
}
.reading-tips-title {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 12px;
}
.reading-tips-card {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.reading-tips-heading {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 10px;
}
.reading-tips-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.reading-tips-list li {
  font-size: var(--fs-content);
  color: #555;
  padding: 6px 0;
  line-height: 1.5;
  border-bottom: 1px solid #f0f0f0;
}
.reading-tips-list li:last-child {
  border-bottom: none;
}

/* ════════════════════════════════════════════════════════════════
   周边购买页 (#shop) 专属样式
   ════════════════════════════════════════════════════════════════ */
.shop-page {
  padding: 0 16px 100px;
}

.shop-header {
  text-align: center;
  padding: 16px 0;
}

.shop-header h2 {
  font-size: var(--fs-title);
  margin: 0 0 6px;
  color: var(--text);
}

.shop-header p {
  font-size: var(--fs-content);
  color: var(--accent);
  margin: 0;
}

.shop-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.shop-card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.shop-card-img {
  position: relative;
  width: 100%;
  aspect-ratio: 3/2;
  background: var(--bg);
  overflow: hidden;
}

.shop-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.shop-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--gold);
  color: var(--white);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
}

.shop-card-info {
  padding: 12px;
}

.shop-card-info h3 {
  font-size: var(--fs-title);
  margin: 0 0 6px;
  color: var(--text);
}

.shop-desc {
  font-size: var(--fs-content);
  color: var(--accent);
  margin: 0 0 8px;
  line-height: 1.5;
}

.shop-price-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.shop-price {
  font-size: 20px;
  font-weight: 700;
  color: #e74c3c;
}

.shop-origin-price {
  font-size: 13px;
  color: var(--accent);
  text-decoration: line-through;
}

.shop-sold {
  font-size: 12px;
  color: var(--accent);
  margin: 0 0 8px;
}

.shop-actions {
  display: flex;
  gap: 8px;
}

.shop-cart-btn, .shop-buy-btn {
  flex: 1;
  padding: 10px 0;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: transform 0.2s;
  border: none;
  font-family: inherit;
}

.shop-cart-btn:active, .shop-buy-btn:active {
  transform: scale(0.97);
}

.shop-cart-btn {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
}

.shop-buy-btn {
  background: var(--gold);
  color: var(--white);
  text-decoration: none;
  display: block;
}

.shop-cart-bar {
  position: fixed;
  bottom: 64px;
  left: 0;
  right: 0;
  background: var(--white);
  border-top: 1px solid var(--border);
  padding: 8px 16px;
  text-align: center;
  z-index: 10;
}

.shop-cart-link {
  display: inline-block;
  padding: 8px 24px;
  background: var(--gold);
  color: var(--white);
  border-radius: 20px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}

.cart-count-badge {
  display: inline-block;
  background: #e74c3c;
  color: var(--white);
  font-size: 11px;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  line-height: 20px;
  text-align: center;
  margin-left: 4px;
}

/* ── Checkout ──────────────────────────────────────────────── */
.shop-checkout-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  align-items: flex-end;
  justify-content: center;
}

.shop-checkout-panel {
  background: var(--white);
  width: 100%;
  max-width: 500px;
  max-height: 80vh;
  border-radius: 16px 16px 0 0;
  overflow-y: auto;
  padding: 20px 16px 30px;
}

.shop-checkout-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.shop-checkout-header h3 {
  margin: 0;
  font-size: var(--fs-title);
  color: var(--text);
}

.shop-checkout-close {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--accent);
  cursor: pointer;
  padding: 4px;
  font-family: inherit;
}

.shop-checkout-list {
  margin-bottom: 16px;
}

.checkout-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.checkout-item-name {
  font-size: var(--fs-content);
  color: var(--text);
}

.checkout-item-price {
  font-size: 14px;
  font-weight: 600;
  color: #e74c3c;
}

.shop-checkout-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.shop-checkout-form input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
}

.shop-checkout-form input:focus {
  border-color: var(--gold);
}

.checkout-submit {
  padding: 12px;
  background: var(--gold);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  margin-top: 4px;
}

.checkout-submit:active {
  opacity: 0.8;
}

/* ════════════════════════════════════════════════════════════════
   电子订阅页 (#ebook) 专属样式
   ════════════════════════════════════════════════════════════════ */
.ebook-page {
  padding: 0 16px 40px;
}

.ebook-header {
  text-align: center;
  padding: 16px 0;
}

.ebook-header h2 {
  font-size: var(--fs-title);
  margin: 0 0 6px;
  color: var(--text);
}

.ebook-header p {
  font-size: var(--fs-content);
  color: var(--accent);
  margin: 0;
}

.ebook-list-outer {
  padding: 8px 0;
}

.ebook-card-big {
  background: var(--white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.2s;
}

.ebook-card-big:active {
  transform: scale(0.98);
}

.ebook-card-big-cover {
  width: 100%;
  aspect-ratio: 4/3;
  background: var(--bg);
  overflow: hidden;
}

.ebook-card-big-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ebook-card-big-info {
  padding: 14px;
}

.ebook-card-big-info h3 {
  font-size: var(--fs-title);
  margin: 0 0 6px;
  color: var(--text);
}

.ebook-card-big-info p {
  font-size: var(--fs-content);
  color: var(--accent);
  margin: 0 0 4px;
}

.ebook-card-desc {
  font-size: var(--fs-content);
  color: var(--text);
  margin: 6px 0;
  line-height: 1.5;
}

.ebook-free-tag {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 12px;
  background: #e8f5e9;
  color: #2e7d32;
  font-size: 12px;
  border-radius: 12px;
  font-weight: 500;
}

/* ── Flipbook Viewer ────────────────────────────────────────── */
.ebook-detail {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: #1a1a2e;
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.ebook-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(0,0,0,0.3);
  color: var(--white);
  z-index: 10;
}

.ebook-back-btn {
  color: var(--white);
  text-decoration: none;
  font-size: 14px;
  padding: 4px 8px;
}

.ebook-title-bar {
  font-size: 14px;
  font-weight: 500;
}

.ebook-viewport {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  perspective: 1200px;
}

.ebook-page-flip {
  width: 85%;
  max-width: 500px;
  aspect-ratio: 3/4;
  position: relative;
  cursor: pointer;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  backface-visibility: hidden;
}

.ebook-page-flip img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--white);
  display: block;
}

.ebook-tap-left, .ebook-tap-right {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 35%;
  z-index: 5;
  cursor: pointer;
}

.ebook-tap-left {
  left: 0;
}

.ebook-tap-right {
  right: 0;
}

.ebook-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 12px 16px;
  background: rgba(0,0,0,0.3);
  color: var(--white);
  z-index: 10;
}

.ebook-nav-btn {
  background: none;
  border: none;
  color: var(--white);
  font-size: 24px;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 50%;
  transition: background 0.2s;
  font-family: inherit;
}

.ebook-nav-btn:active {
  background: rgba(255,255,255,0.15);
}

.ebook-progress {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
}

.ebook-total {
  opacity: 0.5;
}

.ebook-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  margin: 0 2px;
  transition: background 0.3s;
  cursor: pointer;
}

.ebook-dot.active {
  background: var(--gold);
  width: 10px;
  height: 10px;
}

/* ══════════════════════════════════════════════════════════════
   个人中心页 (#profile) 专属样式
   ══════════════════════════════════════════════════════════════ */

/* ── 用户信息头部 ──────────────────────────────────────────── */
.profile-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 20px 20px;
  background: linear-gradient(135deg, #F7E1D7 0%, #FBF8F5 50%, #F7E1D7 100%);
  border-radius: 0 0 24px 24px;
  text-align: center;
}

.profile-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--white);
  box-shadow: 0 4px 16px rgba(212, 185, 140, 0.4);
  margin-bottom: 12px;
}

.profile-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.profile-user {
  margin-bottom: 14px;
}

.profile-name {
  font-size: var(--fs-title);
  font-weight: 700;
  color: var(--title);
  margin-bottom: 6px;
}

.profile-badge {
  display: inline-block;
  padding: 4px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--white);
  background: linear-gradient(135deg, var(--gold) 0%, #C4A87C 100%);
  border-radius: 20px;
  box-shadow: 0 2px 8px rgba(212, 185, 140, 0.3);
}

.profile-progress {
  width: 100%;
  max-width: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.profile-progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 4px;
  overflow: hidden;
}

.profile-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--gold) 0%, #C4A87C 100%);
  border-radius: 4px;
  transition: width 0.4s ease;
}

.profile-progress-text {
  font-size: 12px;
  color: var(--accent);
}

/* ── 功能菜单列表 ──────────────────────────────────────────── */
.profile-menu {
  padding: 16px 20px;
}

.profile-menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--white);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  margin-bottom: 10px;
  cursor: pointer;
  transition: transform 0.2s;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.profile-menu-item:active {
  transform: scale(0.97);
}

.profile-menu-icon {
  font-size: 22px;
  flex-shrink: 0;
  line-height: 1;
}

.profile-menu-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.profile-menu-label {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--title);
}

.profile-menu-desc {
  font-size: var(--fs-content);
  color: var(--accent);
  margin-top: 2px;
}

.profile-menu-arrow {
  font-size: 22px;
  color: var(--gold);
  flex-shrink: 0;
  line-height: 1;
}

/* ── 成就墙区域 ────────────────────────────────────────────── */
.profile-section {
  padding: 8px 20px 20px;
}

.profile-achievements {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px 8px;
}

.profile-badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
}

.profile-badge-item.unlocked .profile-badge-circle {
  background: var(--white);
  border: 2px solid var(--gold);
  color: var(--gold);
}

.profile-badge-item.locked .profile-badge-circle {
  background: #f0ece8;
  border: 2px solid #ddd;
  color: #bbb;
}

.profile-badge-item.locked .profile-badge-label {
  color: #bbb;
}

.profile-badge-item.locked .profile-badge-hint {
  color: #ccc;
}

.profile-badge-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 2px 8px rgba(212, 185, 140, 0.2);
  transition: transform 0.2s;
}

.profile-badge-item:active .profile-badge-circle {
  transform: scale(0.92);
}

.profile-badge-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--title);
  white-space: nowrap;
}

.profile-badge-hint {
  font-size: 10px;
  color: var(--accent);
  line-height: 1.2;
}

/* ── 设置项 ────────────────────────────────────────────────── */
.profile-settings {
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.profile-setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid #f5f0eb;
}

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

.profile-setting-label {
  font-size: var(--fs-content);
  font-weight: 500;
  color: var(--title);
}

/* ── Toggle Switch ─────────────────────────────────────────── */
.profile-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.profile-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.profile-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: #ddd;
  border-radius: 24px;
  transition: background 0.3s;
  -webkit-tap-highlight-color: transparent;
}

.profile-slider::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--white);
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
  transition: transform 0.3s;
}

.profile-switch input:checked + .profile-slider {
  background: var(--gold);
}

.profile-switch input:checked + .profile-slider::before {
  transform: translateX(20px);
}

/* ══════════════════════════════════════════════════════════════
   3D 预览页 (#viewer) 专属样式
   ══════════════════════════════════════════════════════════════ */

/* ── Viewer 页面容器 ────────────────────────────────────────── */
.viewer-page {
  position: relative;
  width: 100%;
  min-height: 100vh;
  background: #1a1a1a;
  display: flex;
  flex-direction: column;
}

/* ── Viewer 顶栏 ────────────────────────────────────────────── */
.viewer-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 100;
  color: var(--white);
}

.viewer-back {
  background: none;
  border: none;
  color: var(--white);
  font-size: 15px;
  padding: 4px 8px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.viewer-back:active {
  opacity: 0.7;
}

.viewer-title {
  font-size: var(--fs-title);
  font-weight: 600;
}

/* ── model-viewer 元素（3D 模型容器）────────────────────────── */
model-viewer {
  display: block;
  width: 100%;
  height: calc(100vh - 120px);
  background: #1a1a1a;
  outline: none;
}

/* ── Viewer 底部信息 ────────────────────────────────────────── */
.viewer-info {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 10px 16px;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  text-align: center;
  color: var(--white);
  font-size: 14px;
  z-index: 100;
}

/* ══════════════════════════════════════════════════════════════
   AR扫一扫 浮动按钮 (首页)
   ══════════════════════════════════════════════════════════════ */

.ar-scan-btn {
  position: fixed;
  bottom: 72px;
  right: 20px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold) 0%, #C4A87C 100%);
  box-shadow: 0 4px 16px rgba(212, 185, 140, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--white);
  text-decoration: none;
  z-index: 500;
  transition: transform 0.2s, box-shadow 0.2s;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  flex-direction: column;
  gap: 0;
  line-height: 1.2;
  text-align: center;
  padding: 0;
}

.ar-scan-btn:active {
  transform: scale(0.92);
  box-shadow: 0 2px 8px rgba(212, 185, 140, 0.4);
}

/* ══════════════════════════════════════════════════════════════
   扫描二维码页 (#viewer?scan) 专属样式
   ══════════════════════════════════════════════════════════════ */

/* ── Scanner 全屏容器 ───────────────────────────────────────── */
.scanner-page {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: #000;
  display: flex;
  flex-direction: column;
  z-index: 2000;
}

/* ── Scanner 顶栏 ───────────────────────────────────────────── */
.scanner-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  color: var(--white);
  font-size: 18px;
  font-weight: 600;
  background: rgba(0, 0, 0, 0.7);
  z-index: 10;
}

.scanner-close {
  background: none;
  border: none;
  color: var(--white);
  font-size: 24px;
  cursor: pointer;
  padding: 4px 8px;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  line-height: 1;
}

.scanner-close:active {
  opacity: 0.6;
}

/* ── Scanner 取景器（摄像头区域）────────────────────────────── */
.scanner-viewfinder {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #111;
}

.scanner-viewfinder video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ── 扫描框 ─────────────────────────────────────────────────── */
.scanner-frame {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 220px;
  height: 220px;
  transform: translate(-50%, -50%);
  border: 2px solid var(--gold);
  border-radius: 12px;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5);
  pointer-events: none;
}

/* ── 扫描提示文字 ───────────────────────────────────────────── */
.scanner-hint {
  position: absolute;
  bottom: 60px;
  left: 0;
  right: 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  z-index: 10;
  padding: 0 20px;
}

/* ══════════════════════════════════════════════════════════════
   Product Switcher (水平切换栏)
   ══════════════════════════════════════════════════════════════ */
.product-switcher {
  background: var(--product-light, #FBF8F5);
  padding: 8px 12px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-bottom: 1px solid rgba(0,0,0,0.04);
}
.product-switcher-scroll {
  display: flex;
  gap: 8px;
  white-space: nowrap;
}
.product-switcher-tab {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  border-radius: 20px;
  background: transparent;
  border: 1px solid var(--product-gold, #D4B98C);
  color: var(--product-dark, #5C4A3E);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
}
.product-switcher-tab.active {
  background: var(--product-primary, #F7E1D7);
  border-color: var(--product-accent, #8B7355);
  color: var(--product-dark, #5C4A3E);
  font-weight: 600;
}
.product-switcher-tab:active {
  transform: scale(0.95);
}
.product-switcher::-webkit-scrollbar {
  display: none;
}

/* ══════════════════════════════════════════════════════════════
   Reading Panel — Card Title
   ══════════════════════════════════════════════════════════════ */
.reading-card-title {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 4px 0;
  line-height: 1.4;
}

/* ══════════════════════════════════════════════════════════════
   Theme Colors — Base fallback
   ══════════════════════════════════════════════════════════════ */
:root {
  --product-primary: #F7E1D7;
  --product-accent: #8B7355;
  --product-gold: #D4B98C;
  --product-light: #FBF8F5;
  --product-dark: #5C4A3E;
}

/* ══════════════════════════════════════════════════════════════
   Discover — Static grouped by product
   ══════════════════════════════════════════════════════════════ */
.discover-all {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.discover-group {
  margin-bottom: 4px;
}
.discover-group-title {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 8px 0;
  padding-left: 4px;
}

/* ══════════════════════════════════════════════════════════════
   Masters — Static list on home
   ══════════════════════════════════════════════════════════════ */
.masters-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ══════════════════════════════════════════════════════════════
   Culture Grid — Inline on craft page
   ══════════════════════════════════════════════════════════════ */
.culture-grid-inline {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 420px) {
  .culture-grid-inline {
    grid-template-columns: 1fr;
  }
}

/* ══════════════════════════════════════════════════════════════
   Study — Route List Page
   ══════════════════════════════════════════════════════════════ */
.study-banner {
  padding: 32px 20px 20px;
  text-align: center;
}
.study-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 8px;
}
.study-subtitle {
  font-size: var(--fs-content);
  color: #999;
  margin: 0 0 16px;
}
.study-divider {
  display: flex;
  justify-content: center;
}
.study-divider-line {
  width: 60px;
  height: 3px;
  background: var(--product-gold, #D4B98C);
  border-radius: 2px;
}
.study-route-list {
  padding: 0 16px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.study-route-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  text-decoration: none;
  transition: all 0.2s;
}
.study-route-card:active {
  transform: scale(0.98);
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}
.study-route-emoji {
  font-size: 36px;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--product-light, #FBF8F5);
  border-radius: 12px;
  flex-shrink: 0;
}
.study-route-info {
  flex: 1;
  min-width: 0;
}
.study-route-name {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 4px;
}
.study-route-desc {
  font-size: var(--fs-content);
  color: #999;
  margin: 0;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.study-route-arrow {
  font-size: 18px;
  color: #ccc;
  flex-shrink: 0;
}

/* ══════════════════════════════════════════════════════════════
   Study — Detail Page
   ══════════════════════════════════════════════════════════════ */
.study-detail-banner {
  padding: 24px 20px 20px;
  background: var(--product-light, #FBF8F5);
}
.study-detail-back {
  display: inline-block;
  font-size: 14px;
  color: var(--product-accent, #8B7355);
  text-decoration: none;
  margin-bottom: 12px;
}
.study-detail-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 8px;
}
.study-detail-intro {
  font-size: var(--fs-content);
  color: #777;
  line-height: 1.6;
  margin: 0;
}
.study-detail-body {
  padding: 16px;
  padding-bottom: 80px;
}
.study-section {
  margin-bottom: 24px;
}
.study-section-title {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--product-gold, #D4B98C);
}
.study-day {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: 0 1px 6px rgba(0,0,0,0.05);
}
.study-day-title {
  font-size: var(--fs-title);
  font-weight: 700;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 12px;
}
.study-slot {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
  font-size: var(--fs-content);
  line-height: 1.5;
}
.study-slot-label {
  flex-shrink: 0;
  width: 44px;
  font-weight: 600;
  color: var(--product-accent, #8B7355);
}
.study-slot p {
  margin: 0;
  color: #555;
}
.study-cp-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.study-cp-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: #fff;
  padding: 12px;
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.study-cp-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--product-gold, #D4B98C);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}
.study-cp-body {
  flex: 1;
}
.study-cp-body h4 {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 4px;
}
.study-cp-task {
  font-size: var(--fs-content);
  color: #777;
  margin: 0;
}
.study-task-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.study-task-item {
  background: #fff;
  padding: 14px;
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.study-task-item h4 {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 8px;
}
.study-task-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.study-task-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--product-light, #FBF8F5);
  border: 1px solid var(--product-gold, #D4B98C);
  border-radius: 16px;
  font-size: var(--fs-content);
  color: var(--product-dark, #5C4A3E);
  cursor: pointer;
  user-select: none;
  transition: all 0.2s ease;
}
.study-task-tag:hover {
  opacity: 0.8;
}
.study-task-tag.checked {
  background: var(--product-gold, #D4B98C);
  color: #fff;
  border-color: var(--product-gold, #D4B98C);
}

.study-task-input {
  display: block;
  width: 100%;
  margin-top: 8px;
  padding: 8px 12px;
  border: 1px solid var(--product-gold, #D4B98C);
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
  color: var(--product-dark, #5C4A3E);
  background: var(--product-light, #FBF8F5);
  resize: vertical;
  min-height: 60px;
  box-sizing: border-box;
  outline: none;
}
.study-task-input:focus {
  border-color: var(--accent, #8B7355);
  box-shadow: 0 0 0 2px rgba(139, 115, 85, 0.15);
}

/* ── 研学购买套餐（三档） ────────────────────────────────── */
.study-purchase-tiers {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.purchase-card.purchase-tier {
  background: #fff;
  border-radius: 12px;
  padding: 14px;
  box-shadow: 0 1px 6px rgba(0,0,0,0.05);
  border: 1px solid var(--product-gold, #D4B98C);
  transition: transform 0.2s;
}
.purchase-card.purchase-tier:hover {
  transform: translateY(-2px);
}
.purchase-tier .purchase-title {
  font-size: var(--fs-title);
  font-weight: 700;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 8px;
}
.purchase-tier .purchase-price-badge {
  font-size: 22px;
  font-weight: 700;
  color: var(--accent, #8B7355);
  margin-bottom: 8px;
}
.purchase-tier .purchase-price-badge small {
  font-size: 13px;
  font-weight: 400;
  color: #999;
}
.purchase-tier .purchase-features {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
}
.purchase-tier .purchase-features li {
  font-size: var(--fs-content);
  color: #666;
  padding: 3px 0;
}
.purchase-tier .purchase-btn {
  width: 100%;
  padding: 10px;
  border: none;
  border-radius: 20px;
  background: var(--product-gold, #D4B98C);
  color: #fff;
  font-size: var(--fs-title);
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}
.purchase-tier .purchase-btn:hover {
  opacity: 0.85;
}

/* ── 幼儿动态与安全提示 ────────────────────────────────────── */
.study-safety {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.study-safety-item {
  background: #fff;
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  box-shadow: 0 1px 6px rgba(0,0,0,0.05);
}
.study-safety-icon {
  font-size: 24px;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f5f0eb;
  border-radius: 8px;
}
.study-safety-body {
  flex: 1;
  min-width: 0;
}
.study-safety-body h4 {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--product-dark, #5C4A3E);
  margin: 0 0 4px;
}
.study-safety-body p {
  font-size: var(--fs-content);
  color: #666;
  margin: 0;
  line-height: 1.5;
}

/* ══════════════════════════════════════════════════════════════
   Profile Sub-pages
   ══════════════════════════════════════════════════════════════ */
.profile-sub-page {
  padding: 0;
  background: #f8f6f3;
  min-height: 100%;
}
.profile-sub-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: #fff;
  border-bottom: 1px solid #eee;
  cursor: pointer;
  position: sticky;
  top: 0;
  z-index: 10;
}
.profile-sub-back {
  font-size: var(--fs-content);
  color: var(--accent, #8B7355);
  font-weight: 500;
}
.profile-sub-title {
  font-size: var(--fs-title);
  font-weight: 600;
  color: #333;
  margin: 0;
}
.profile-sub-content {
  padding: 12px 16px;
}
.profile-sub-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #fff;
  padding: 14px;
  border-radius: 10px;
  margin-bottom: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.profile-sub-card-icon {
  font-size: 28px;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--product-light, #FBF8F5);
  border-radius: 10px;
}
.profile-sub-card-info {
  flex: 1;
  min-width: 0;
}
.profile-sub-card-title {
  font-size: var(--fs-title);
  font-weight: 600;
  color: #333;
  margin-bottom: 3px;
}
.profile-sub-card-desc {
  font-size: var(--fs-content);
  color: #999;
}
.profile-sub-status-done {
  color: #52c41a;
  font-weight: 500;
}
.profile-sub-status-progress {
  color: #faad14;
  font-weight: 500;
}
.profile-sub-status-pending {
  color: #bbb;
}
.profile-sub-badge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 10px 0;
}

/* ══════════════════════════════════════════════════════════════
   Culture Detail Modal (非遗文化·四大价值弹窗)
   ══════════════════════════════════════════════════════════════ */
.culture-modal-content {
  max-width: 420px;
  max-height: 80vh;
  overflow-y: auto;
}
.culture-modal-content .modal-subtitle {
  font-size: var(--fs-title);
  color: var(--accent, #8B7355);
  margin: -8px 0 16px;
  padding: 0;
}
.culture-detail-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.culture-detail-item {
  background: var(--light-bg, #f9f7f4);
  border-radius: 12px;
  padding: 14px;
  border: 1px solid #eee;
  transition: all 0.2s ease;
}
.culture-detail-item.active {
  border-color: var(--product-gold, #D4B98C);
  background: var(--product-light, #FBF8F5);
}
.culture-detail-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 8px;
}
.culture-detail-icon {
  font-size: 24px;
  line-height: 1;
  flex-shrink: 0;
}
.culture-detail-label {
  font-size: 11px;
  color: var(--product-gold, #D4B98C);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: block;
  margin-bottom: 2px;
}
.culture-detail-title {
  font-size: var(--fs-title);
  font-weight: 600;
  color: var(--product-dark, #5C4A3E);
  margin: 0;
}
.culture-detail-desc {
  font-size: var(--fs-content);
  color: #666;
  line-height: 1.6;
  margin: 0;
  padding-left: 34px;
}

/* ══════════════════════════════════════════════════════════════
   Elder Large Font Mode (长辈大字版)
   ══════════════════════════════════════════════════════════════ */
.elder-mode {
  --fs-title: 22px;
  --fs-content: 19px;
  font-size: var(--fs-content);
  line-height: 1.6;
}
/* 特殊元素在长辈模式下需保持独特大小的继续单独声明 */
.elder-mode .app-title {
  font-size: 22px;
}
.elder-mode .tab-item {
  font-size: 14px;
}
.elder-mode .checkpoint-icon {
  font-size: 28px;
}
.elder-mode .study-task-tag {
  padding: 8px 16px;
}
.elder-mode .profile-setting-item {
  padding: 14px 16px;
}