/* B 版 /ebk/learn 学习导读站（与 A 版 App 底栏阅读器视觉区分） */

body.learn-body {
  margin: 0;
  font-family: "Source Han Sans SC", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  /* 马卡龙 / 糖果系：柔化深蓝，全站导读页统一用变量 */
  --learn-text: #2a3040;
  --learn-text-soft: #4b5568;
  --learn-muted: #6b7280;
  --learn-link: #6e7ee8;
  --learn-link-hover: #5568d6;
  --learn-nav-muted: #64748b;
  --learn-nav-hover: #7c89f0;
  /* 主购买 CTA：与会员页 .btn-buy / #1d7ce8 体系一致，引导性强 */
  --learn-buy-top: #2b88f0;
  --learn-buy: #1d7ce8;
  --learn-buy-deep: #156cbd;
  --learn-buy-shadow: 0 4px 18px rgba(29, 124, 232, 0.38);
  --learn-buy-shadow-hover: 0 7px 26px rgba(29, 124, 232, 0.48);
  --learn-hero-alt-from: #7dd3fc;
  --learn-hero-alt-to: #6ee7c5;
  --learn-bg-a: #fff7fb;
  --learn-bg-b: #f3f8ff;
  --learn-bg-c: #f4fff9;
  background: linear-gradient(155deg, var(--learn-bg-a) 0%, var(--learn-bg-b) 46%, var(--learn-bg-c) 100%);
  color: var(--learn-text);
  line-height: 1.65;
  min-height: 100vh;
}

/* 正文区默认链接色；勿用单一 .learn-body a 覆盖主按钮白字（见 .learn-btn-primary） */
.learn-body .learn-main a:not(.learn-btn-primary):not(.learn-btn-hero-alt):not(.learn-pack-btn):not(.learn-pack-related-title) {
  color: var(--learn-link);
}

/* 正文内指向「词汇汇总」的链接：略强调，不与购买蓝混淆 */
.learn-body .learn-main a.learn-inline-vocab {
  color: #0f766e;
  font-weight: 600;
}

.learn-body .learn-main a.learn-inline-vocab:hover {
  color: #0d9488;
}

.learn-body .learn-topbar a {
  color: var(--learn-nav-muted);
}

.learn-body .learn-topbar a:hover {
  color: var(--learn-nav-hover);
}

.learn-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(29, 124, 232, 0.12);
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(8px);
}

.learn-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--learn-text);
  text-decoration: none;
}

.learn-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.learn-nav a {
  font-size: 0.9rem;
  color: var(--learn-nav-muted);
  text-decoration: none;
}

.learn-nav a:hover {
  color: var(--learn-nav-hover);
}

.learn-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 20px 48px;
}

.learn-footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 40px;
  font-size: 0.88rem;
  color: #64748b;
  border-top: 1px solid #e2e8f0;
}

.learn-footer a {
  color: var(--learn-link);
}

.learn-muted {
  color: var(--learn-muted);
  font-size: 0.92rem;
}

/* 首页 */
.learn-hero {
  background:
    radial-gradient(900px 340px at 14% 0%, rgba(29, 124, 232, 0.14), transparent 58%),
    radial-gradient(720px 300px at 92% 12%, rgba(16, 185, 129, 0.1), transparent 55%),
    rgba(255, 255, 255, 0.96);
  border-radius: 16px;
  padding: 28px 26px;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(29, 124, 232, 0.14);
  margin-bottom: 28px;
}

.learn-hero h1 {
  margin: 0 0 12px;
  font-size: 1.75rem;
  color: var(--learn-text);
}

.learn-lead {
  margin: 0 0 20px;
  font-size: 1.05rem;
  color: var(--learn-text-soft);
}

.learn-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.learn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid #cbd5e1;
  background: #fff;
  color: #334155;
  text-decoration: none;
  cursor: pointer;
}

.learn-btn:hover {
  border-color: #94a3b8;
  color: #0f172a;
}

.learn-btn-primary {
  background: linear-gradient(180deg, var(--learn-buy-top) 0%, var(--learn-buy) 42%, var(--learn-buy-deep) 100%);
  border-color: transparent;
  color: #fff !important;
  box-shadow: var(--learn-buy-shadow);
}

.learn-btn-primary:hover,
.learn-btn-primary:visited,
.learn-btn-primary:focus {
  filter: brightness(1.03);
  color: #fff !important;
  box-shadow: var(--learn-buy-shadow-hover);
}

/* 首页首屏：强化「去书城 / 购买」主按钮体量 */
.learn-hero .learn-btn-primary {
  padding: 12px 22px;
  font-size: 1.02rem;
  border-radius: 11px;
}

/* 首页 hero：第二颗 CTA 与主按钮同为白字，色带区分层次 */
.learn-hero .learn-hero-cta {
  margin-top: 32px;
}

.learn-btn-hero-alt {
  background: linear-gradient(135deg, var(--learn-hero-alt-from), var(--learn-hero-alt-to));
  border-color: transparent;
  color: #fff !important;
}

.learn-btn-hero-alt:hover,
.learn-btn-hero-alt:visited,
.learn-btn-hero-alt:focus {
  filter: brightness(1.05);
  color: #fff !important;
}

.learn-section {
  margin-top: 28px;
}

.learn-section h2 {
  margin: 0 0 12px;
  font-size: 1.25rem;
}

.learn-level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.learn-level-card {
  background: #fff;
  border-radius: 14px;
  padding: 18px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}

.learn-level-card h3 {
  margin: 0 0 12px;
  font-size: 1.05rem;
}

.learn-book-list {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.92rem;
}

.learn-book-list li {
  margin-bottom: 6px;
}

.learn-all-books {
  list-style: none;
  margin: 0;
  padding: 0;
  background: #fff;
  border-radius: 14px;
  border: 1px solid #e2e8f0;
  padding: 16px 20px;
}

.learn-all-books li {
  padding: 8px 0;
  border-bottom: 1px solid #f1f5f9;
}

.learn-all-books li:last-child {
  border-bottom: 0;
}

/* 书目页 */
.learn-article {
  background: #fff;
  border-radius: 16px;
  padding: 26px 24px 32px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
}

.learn-breadcrumb {
  font-size: 0.88rem;
  color: #64748b;
  margin-bottom: 16px;
}

.learn-book-header h1 {
  margin: 0 0 8px;
  font-size: 1.6rem;
}

.learn-meta {
  margin: 0 0 14px;
  color: #64748b;
  font-size: 0.95rem;
}

.learn-desc {
  margin: 0 0 18px;
  color: #334155;
}

.learn-book-cta {
  margin-bottom: 24px;
}

.learn-toc {
  list-style: none;
  margin: 0;
  padding: 0;
}

.learn-toc li {
  border-bottom: 1px solid #f1f5f9;
  padding: 12px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}

.learn-toc a {
  flex: 1;
  min-width: 200px;
  text-decoration: none;
  color: #0f172a;
}

.learn-toc a:hover {
  color: #2563eb;
}

.learn-toc-idx {
  font-weight: 600;
  color: #64748b;
  margin-right: 8px;
}

.learn-toc-title {
  font-weight: 600;
}

.learn-toc-zh {
  display: block;
  width: 100%;
  font-size: 0.88rem;
  color: #64748b;
  margin-top: 4px;
}

.learn-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 999px;
  background: #dbeafe;
  color: #1e40af;
}

.learn-badge-muted {
  background: #f1f5f9;
  color: #64748b;
}

/* 单课长页 */
.learn-lesson-head h1 {
  margin: 0 0 6px;
  font-size: 1.55rem;
}

.learn-lesson-zh {
  margin: 0;
  font-size: 1.05rem;
  color: #475569;
}

.learn-lesson-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 22px;
}

@media (min-width: 900px) {
  .learn-lesson-layout {
    grid-template-columns: 1fr 260px;
    align-items: start;
  }
}

.learn-figure {
  margin: 0 0 20px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #e2e8f0;
}

.learn-figure img {
  width: 100%;
  display: block;
}

.learn-figure.is-locked-teaser img {
  opacity: 0.85;
  filter: saturate(0.95);
}

.learn-audio-block h2,
.learn-sentences h2,
.learn-supplement h2 {
  margin: 22px 0 10px;
  font-size: 1.15rem;
}

.learn-audio-full {
  width: 100%;
  margin-top: 8px;
}

.learn-audio-locked {
  background: #f8fafc;
  border: 1px dashed #cbd5e1;
  border-radius: 12px;
  padding: 18px;
}

.learn-sentence-list {
  margin: 0;
  padding-left: 1.2rem;
}

.learn-sentence-item {
  margin-bottom: 18px;
}

.learn-sentence-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 10px;
}

.learn-sentence-en {
  margin: 0;
  flex: 1;
  min-width: 200px;
  font-size: 1.05rem;
  color: #0f172a;
}

.learn-audio-sentence {
  width: 100%;
  max-width: 280px;
  height: 32px;
}

.learn-sentence-zh {
  margin: 8px 0 0;
  padding: 10px 12px;
  background: #f0fdf4;
  border-left: 3px solid #22c55e;
  border-radius: 0 8px 8px 0;
  font-size: 0.95rem;
  color: #166534;
}

.learn-mask-inline {
  margin-top: 20px;
  padding: 18px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 12px;
}

/* 双语 CTA：英文钩子 + 中文说明（主按钮内子行） */
.learn-btn.learn-btn-biline {
  flex-direction: column;
  line-height: 1.28;
  gap: 3px;
  text-align: center;
}

.learn-btn-biline .learn-cta-en {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.learn-btn-primary .learn-cta-en {
  color: rgba(255, 255, 255, 0.96) !important;
}

.learn-btn:not(.learn-btn-primary) .learn-cta-en {
  font-size: 0.68rem;
  color: #64748b;
}

/* 免费课内「能力升级」条：引导阅读器 / 书架，弱化纯购书话术 */
.learn-cta-strip {
  margin: 22px 0;
  padding: 18px 18px 16px;
  border-radius: 14px;
  border: 1px solid rgba(99, 102, 241, 0.22);
  background: linear-gradient(135deg, rgba(238, 242, 255, 0.95), rgba(255, 255, 255, 0.98));
}

.learn-cta-strip-lead {
  margin: 0 0 10px;
  font-size: 0.95rem;
  color: var(--learn-text-soft);
}

.learn-cta-strip-lead strong {
  color: #4338ca;
  font-weight: 700;
}

.learn-cta-strip ul {
  margin: 0 0 14px;
  padding-left: 1.15rem;
  color: var(--learn-text-soft);
  font-size: 0.92rem;
}

.learn-cta-strip li {
  margin-bottom: 6px;
}

.learn-prose {
  margin: 0 0 12px;
  color: var(--learn-text-soft);
  font-size: 0.98rem;
}

.learn-vocab-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.learn-vocab-chip {
  border: 1px solid rgba(199, 210, 254, 0.95);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(237, 233, 254, 0.5));
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.85rem;
  cursor: pointer;
  color: #6366f1;
}

.learn-vocab-chip:hover {
  background: rgba(237, 233, 254, 0.85);
  border-color: #c4b5fd;
}

.learn-aside-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 14px;
}

.learn-aside-card h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.learn-aside-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 10px 0;
}

.learn-link {
  font-size: 0.9rem;
}

.learn-vocab-pop {
  position: fixed;
  z-index: 100;
  right: 16px;
  bottom: 16px;
  max-width: 320px;
  width: calc(100% - 32px);
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(15, 23, 42, 0.18);
  border: 1px solid #e2e8f0;
  padding: 16px 18px;
}

.learn-vocab-pop-close {
  position: absolute;
  top: 8px;
  right: 10px;
  border: none;
  background: transparent;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  color: #64748b;
}

.learn-vocab-pop h4 {
  margin: 0 28px 8px 0;
  font-size: 1.15rem;
}

/* 首页：学习小贴士卡片 */
.learn-tip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.learn-tip-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  padding: 18px 18px 16px;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}

.learn-tip-card h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  color: #0f172a;
}

.learn-tip-card p {
  margin: 0;
  font-size: 0.95rem;
  color: #475569;
  line-height: 1.65;
}

.learn-hero-points {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.learn-hero-points li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.98rem;
  color: var(--learn-text-soft);
}

.learn-hero-points li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, #c4b5fd, #7dd3fc);
  flex-shrink: 0;
}

/* 语法指南：左目录 + 右正文 */
.learn-grammar-layout {
  display: grid;
  grid-template-columns: minmax(200px, 260px) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

@media (max-width: 840px) {
  .learn-grammar-layout {
    grid-template-columns: 1fr;
  }
}

.learn-grammar-nav {
  position: sticky;
  top: 72px;
  align-self: start;
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.98) 0%, rgba(250, 245, 255, 0.92) 100%);
  border: 1px solid rgba(221, 214, 254, 0.85);
  border-radius: 14px;
  padding: 16px 14px;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.07);
}

@media (max-width: 840px) {
  .learn-grammar-nav {
    position: static;
  }
}

.learn-grammar-nav-title {
  margin: 0 0 12px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #64748b;
}

.learn-grammar-nav-link {
  display: block;
  padding: 8px 10px;
  margin-bottom: 4px;
  border-radius: 8px;
  font-size: 0.92rem;
  color: #334155;
  text-decoration: none;
  border: 1px solid transparent;
}

.learn-grammar-nav-link:hover {
  background: rgba(237, 233, 254, 0.75);
  color: var(--learn-link-hover);
}

.learn-grammar-nav-link.is-active {
  background: linear-gradient(135deg, #ede9fe, #e0f2fe);
  border-color: rgba(165, 180, 252, 0.85);
  color: #4c51a8;
  font-weight: 600;
}

.learn-grammar-main {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(199, 210, 254, 0.55);
  border-radius: 16px;
  padding: 26px 26px 22px;
  box-shadow: 0 8px 28px rgba(129, 140, 248, 0.1);
}

.learn-grammar-head {
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid #e2e8f0;
}

.learn-grammar-kicker {
  margin: 0 0 6px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #8b7fd6;
}

.learn-grammar-head h1 {
  margin: 0 0 8px;
  font-size: 1.65rem;
  color: #0f172a;
}

.learn-grammar-subtitle {
  margin: 0;
  font-size: 1.05rem;
  color: #475569;
}

.learn-grammar-card {
  margin-bottom: 18px;
  padding: 18px 18px 16px;
  background: linear-gradient(180deg, #f8fafc 0%, #fff 48%);
  border: 1px solid #e2e8f0;
  border-radius: 12px;
}

.learn-grammar-card h2 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  color: #0f172a;
}

.learn-grammar-rule {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: #5c6d9e;
  line-height: 1.6;
}

.learn-grammar-prose p {
  margin: 0 0 10px;
  color: #334155;
  font-size: 0.98rem;
}

.learn-grammar-prose p:last-child {
  margin-bottom: 0;
}

.learn-grammar-examples {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 14px;
}

.learn-grammar-examples li {
  list-style: disc;
  color: #64748b;
}

.learn-grammar-ex-en {
  margin: 0 0 4px;
  font-size: 0.98rem;
  color: #0f172a;
  font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, monospace;
}

.learn-grammar-ex-zh {
  margin: 0;
  font-size: 0.92rem;
  color: #475569;
}

.learn-grammar-tip {
  margin: 8px 0 20px;
  padding: 14px 16px;
  border-radius: 12px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  font-size: 0.95rem;
  color: #78350f;
}

.learn-grammar-tip strong {
  color: #92400e;
}

.learn-grammar-back {
  margin: 0;
  font-size: 0.92rem;
  color: #64748b;
}

.learn-grammar-toc-list {
  margin: 8px 0 0;
  padding-left: 1.2rem;
  color: #334155;
  line-height: 1.75;
}

.learn-grammar-toc-list a {
  font-weight: 500;
}

/* —— 词汇学习汇总（/ebk/learn/vocab/）马卡龙卡片 —— */
.learn-vocab-hub .learn-vocab-nav {
  border-color: rgba(252, 231, 243, 0.95);
  box-shadow: 0 4px 22px rgba(244, 114, 182, 0.08);
}

.learn-vocab-kicker {
  margin: 0 0 6px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #a78bfa;
}

.learn-vocab-head {
  margin-bottom: 22px;
  padding: 4px 4px 18px 16px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.85);
  border-radius: 0 0 12px 12px;
  border-left: 5px solid var(--v-accent, #a5b4fc);
  background: linear-gradient(90deg, var(--v-tint, rgba(237, 233, 254, 0.45)) 0%, transparent 72%);
}

.learn-vocab-head h1 {
  margin: 0 0 8px;
  font-size: 1.65rem;
  color: var(--learn-text);
}

.learn-vocab-theme-mint {
  --v-accent: #6ee7b7;
  --v-tint: rgba(209, 250, 229, 0.55);
}

.learn-vocab-theme-lavender {
  --v-accent: #c4b5fd;
  --v-tint: rgba(237, 233, 254, 0.65);
}

.learn-vocab-theme-sky {
  --v-accent: #7dd3fc;
  --v-tint: rgba(224, 242, 254, 0.75);
}

.learn-vocab-theme-peach {
  --v-accent: #fdba74;
  --v-tint: rgba(255, 237, 213, 0.75);
}

.learn-vocab-theme-rose {
  --v-accent: #fb9a8c;
  --v-tint: rgba(255, 228, 230, 0.75);
}

.learn-vocab-theme-lemon {
  --v-accent: #fcd34d;
  --v-tint: rgba(254, 249, 195, 0.85);
}

.learn-vocab-intro-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-bottom: 26px;
}

.learn-vocab-intro-card {
  margin: 0;
  padding: 16px 18px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  font-size: 0.96rem;
  line-height: 1.65;
  color: var(--learn-text-soft);
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.06);
}

.learn-vocab-intro-card p {
  margin: 0;
}

.learn-vocab-intro-card-0 {
  background: linear-gradient(145deg, rgba(224, 242, 254, 0.9), rgba(255, 255, 255, 0.95));
}

.learn-vocab-intro-card-1 {
  background: linear-gradient(145deg, rgba(252, 231, 243, 0.75), rgba(255, 255, 255, 0.95));
}

.learn-vocab-intro-card-2 {
  background: linear-gradient(145deg, rgba(209, 250, 229, 0.75), rgba(255, 255, 255, 0.95));
}

.learn-vocab-tiles-title {
  margin: 8px 0 8px;
  font-size: 1.2rem;
  color: var(--learn-text);
}

.learn-vocab-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.learn-vocab-tile {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  padding: 18px 18px 16px;
  border-radius: 16px;
  text-decoration: none;
  color: inherit;
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 6px 22px rgba(129, 140, 248, 0.1);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  border-left: 5px solid var(--v-accent, #a5b4fc);
  background: linear-gradient(145deg, var(--v-tint, rgba(237, 233, 254, 0.5)), #fff 64%);
}

.learn-vocab-tile:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(129, 140, 248, 0.14);
}

.learn-vocab-tile-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #a78bfa;
}

.learn-vocab-tile-title {
  font-size: 1.08rem;
  color: var(--learn-text);
}

.learn-vocab-tile-sub {
  font-size: 0.9rem;
  color: var(--learn-muted);
  line-height: 1.5;
}

.learn-vocab-card {
  margin-bottom: 16px;
  padding: 18px 18px 16px 20px;
  border-radius: 14px;
  border: 1px solid rgba(226, 232, 240, 0.75);
  border-left: 4px solid var(--v-accent, #a5b4fc);
  background: linear-gradient(110deg, var(--v-tint, rgba(237, 233, 254, 0.35)) 0%, #fff 55%);
  box-shadow: 0 2px 14px rgba(15, 23, 42, 0.04);
}

.learn-vocab-card h2 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  color: var(--learn-text);
}

.learn-vocab-card p {
  margin: 0 0 10px;
  font-size: 0.97rem;
  color: var(--learn-text-soft);
  line-height: 1.65;
}

.learn-vocab-card p:last-child {
  margin-bottom: 0;
}

.learn-vocab-mini-ex {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px dashed rgba(165, 180, 252, 0.65);
}

.learn-vocab-mini-ex-row + .learn-vocab-mini-ex-row {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(226, 232, 240, 0.9);
}

.learn-vocab-mini-en {
  margin: 0 0 4px;
  font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, monospace;
  font-size: 0.92rem;
  color: #4338ca;
}

.learn-vocab-mini-zh {
  margin: 0;
  font-size: 0.88rem;
  color: var(--learn-muted);
}

/* 首页 hero 第三钮：会员入口，不与主购买渐变抢位 */
.learn-btn-member-inline {
  border: 1px solid rgba(29, 124, 232, 0.55);
  background: #fff;
  color: #1d7ce8 !important;
}

.learn-btn-member-inline:hover {
  background: rgba(29, 124, 232, 0.08);
  border-color: #1d7ce8;
  color: #156cbd !important;
}

/* 首页阅读包预告 */
.learn-pack-teaser-list {
  margin: 8px 0 0;
  padding-left: 1.2rem;
  line-height: 1.75;
  color: var(--learn-text-soft);
}

/* —— 阅读包落地页（转化向：对齐会员页蓝白气质） —— */
.learn-pack-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.learn-pack-page {
  max-width: 920px;
  margin: 0 auto;
}

.learn-pack-hero {
  background:
    radial-gradient(1000px 420px at 18% 0%, rgba(29, 124, 232, 0.18), transparent 55%),
    radial-gradient(800px 360px at 92% 10%, rgba(16, 185, 129, 0.12), transparent 58%),
    #fff;
  border: 1px solid rgba(29, 124, 232, 0.14);
  border-radius: 16px;
  padding: 22px 22px 18px;
  margin-bottom: 20px;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
}

.learn-pack-kicker {
  margin: 0 0 8px;
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(29, 124, 232, 0.1);
  color: #1d7ce8;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.learn-pack-hero h1 {
  margin: 10px 0 8px;
  font-size: 1.65rem;
  color: #111827;
  letter-spacing: 0.02em;
}

.learn-pack-lead {
  margin: 0 0 16px;
  font-size: 1.02rem;
  color: #374151;
  line-height: 1.7;
  max-width: 640px;
}

.learn-pack-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.learn-pack-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}

.learn-pack-btn-primary {
  background: linear-gradient(180deg, #2b88f0 0%, #1d7ce8 50%, #156cbd 100%);
  color: #fff !important;
  box-shadow: 0 4px 16px rgba(29, 124, 232, 0.38);
}

.learn-pack-btn-primary:hover {
  filter: brightness(1.03);
  color: #fff !important;
}

.learn-pack-btn-secondary {
  background: #fff;
  color: #1d7ce8 !important;
  border-color: rgba(29, 124, 232, 0.5);
}

.learn-pack-btn-secondary:hover {
  background: rgba(29, 124, 232, 0.06);
  color: #156cbd !important;
}

.learn-pack-hero-note {
  margin: 14px 0 0;
  font-size: 0.9rem;
}

.learn-pack-trust {
  margin-bottom: 22px;
}

.learn-pack-bullets {
  margin: 0 0 14px;
  padding-left: 1.2rem;
  color: #374151;
  line-height: 1.7;
}

.learn-pack-disclaimer {
  margin: 0;
  padding: 14px 16px;
  border-radius: 12px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  font-size: 0.9rem;
  color: #78350f;
  line-height: 1.65;
}

.learn-pack-auto-note {
  margin: 12px 0 0;
  font-size: 0.88rem;
  line-height: 1.55;
}

.learn-pack-major-badge {
  margin: 0 0 8px;
  font-size: 0.88rem;
}

.learn-major-categories .learn-pack-teaser-list {
  margin-top: 8px;
}

.learn-pack-books h2 {
  margin: 0 0 8px;
  font-size: 1.2rem;
  color: #111827;
}

.learn-pack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 14px;
}

.learn-pack-card {
  display: flex;
  gap: 14px;
  padding: 16px;
  border-radius: 14px;
  border: 1px solid rgba(229, 231, 235, 0.95);
  background: #fff;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}

.learn-pack-cover img {
  display: block;
  width: 100px;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
}

.learn-pack-card h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

.learn-pack-card h3 a {
  color: #1d7ce8;
  text-decoration: none;
}

.learn-pack-card h3 a:hover {
  text-decoration: underline;
}

.learn-pack-meta {
  margin: 0 0 8px;
  font-size: 0.85rem;
  color: #6b7280;
}

.learn-pack-blurb {
  margin: 0 0 10px;
  font-size: 0.92rem;
  color: #4b5563;
  line-height: 1.6;
}

.learn-pack-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  font-size: 0.88rem;
}

.learn-pack-link-primary {
  font-weight: 700;
  color: #1d7ce8;
}

.learn-pack-link-muted {
  color: #6b7280;
}

.learn-pack-related {
  margin: 26px 0 8px;
}

.learn-pack-related h2 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  color: #111827;
}

.learn-pack-related-grid {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}

.learn-pack-related-card {
  margin: 0;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid rgba(29, 124, 232, 0.18);
  background: linear-gradient(165deg, rgba(239, 246, 255, 0.9), #fff 70%);
}

.learn-pack-related-title {
  display: block;
  font-weight: 700;
  font-size: 1rem;
  color: #1d7ce8;
  text-decoration: none;
  margin-bottom: 6px;
}

.learn-pack-related-title:hover {
  text-decoration: underline;
}

.learn-pack-related-tagline {
  margin: 0;
  font-size: 0.88rem;
  color: #6b7280;
  line-height: 1.55;
}

.learn-pack-sticky-cta {
  margin: 28px 0 16px;
  padding: 18px 18px 16px;
  border-radius: 14px;
  background: linear-gradient(180deg, #f8fafc 0%, #fff 100%);
  border: 1px solid #e5e7eb;
}

.learn-pack-cta-line {
  margin: 0 0 12px;
  font-size: 0.96rem;
  color: #374151;
  line-height: 1.6;
}

.learn-pack-faq-hint {
  margin: 0;
  font-size: 0.88rem;
}

@media (max-width: 640px) {
  .learn-pack-sticky-cta {
    position: sticky;
    bottom: 12px;
    z-index: 30;
    box-shadow: 0 -4px 20px rgba(15, 23, 42, 0.08);
  }
}

.learn-pack-index-list {
  margin: 16px 0 0;
  padding-left: 1.2rem;
  line-height: 1.85;
  color: var(--learn-text-soft);
}