@charset "UTF-8";
/* ============================================================
   畅言ABC 与义务教育英语教材对接课程 — 主题样式
   Colors:
     Orange:  #FF6B35  (primary)
     Blue:    #4A90D9  (secondary)
     Yellow:  #FFB800  (highlight)
     Green:   #4CAF50  (success)
     Text:    #2D3748  (body)
     Muted:   #718096  (secondary text)
     Light:   #F7FAFC  (background)
     Warm:    #FFF5F0  (warm bg)
     Cool:    #F0F7FF  (cool bg)
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #2D3748;
  background: #F7FAFC;
  line-height: 1.6;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
  background: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1100px;
  margin: 0 auto;
}

.site-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #FF6B35;
  text-decoration: none;
  white-space: nowrap;
}

/* ---------- Nav Dropdown ---------- */
.site-nav {
  display: flex;
  gap: 4px;
  align-items: center;
}

.nav-group {
  position: relative;
}

.site-nav > .page-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  line-height: 1.4;
}

.nav-group-label {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  color: #4A5568;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}

.nav-group-label:hover {
  background: #F7FAFC;
  color: #FF6B35;
}

.nav-arrow {
  font-size: 0.7rem;
  margin-top: 2px;
  transition: transform 0.2s;
}

.nav-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 160px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  padding: 8px 0;
  z-index: 200;
  border: 1px solid #E2E8F0;
}

.nav-group:hover .nav-dropdown {
  display: block;
}

.nav-group:hover .nav-arrow {
  transform: rotate(180deg);
}

.nav-dropdown .page-link {
  display: block;
  padding: 10px 20px;
  color: #4A5568;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.nav-dropdown .page-link:hover {
  background: #F0F7FF;
  color: #4A90D9;
}

/* ---------- Mobile Nav Toggle ---------- */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: #4A5568;
  cursor: pointer;
  padding: 4px 8px;
}

/* ---------- Old page link fallback ---------- */
.page-link {
  color: #4A5568;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

.page-link:hover {
  color: #FF6B35;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #fff;
  border-top: 1px solid #E2E8F0;
  text-align: center;
  padding: 24px 20px;
  color: #718096;
  font-size: 0.85rem;
  margin-top: 40px;
}

.site-footer a {
  color: #4A90D9;
  text-decoration: none;
}

/* ---------- Sections ---------- */
.v-section {
  padding: 40px 20px;
}

.v-section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.v-section-white {
  background: #fff;
}

.v-section-cool {
  background: #F0F7FF;
}

.v-section-warm {
  background: #FFF5F0;
}

.v-section-orange {
  background: linear-gradient(135deg, #FF6B35, #E55A2B);
  color: #fff;
}

.v-section-green {
  background: #F0FFF4;
}

.v-section-title {
  font-size: 1.5rem;
  color: #2D3748;
  margin: 0 0 12px;
}

.v-section-orange .v-section-title {
  color: #fff;
}

.v-section-subtitle {
  font-size: 1rem;
  color: #718096;
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
}

.v-section-center {
  text-align: center;
}

/* ---------- Feature Grid ---------- */
.v-feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.v-feature-item {
  background: #fff;
  border: 1px solid #E2E8F0;
  border-radius: 12px;
  padding: 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.v-feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.v-feature-icon.blue {
  background: #EBF4FF;
  color: #4A90D9;
}

.v-feature-icon.orange {
  background: #FFF5F0;
  color: #FF6B35;
}

.v-feature-icon.green {
  background: #F0FFF4;
  color: #4CAF50;
}

.v-feature-icon.yellow {
  background: #FFF8E6;
  color: #FFB800;
}

.v-feature-text strong {
  display: block;
  margin-bottom: 4px;
  color: #2D3748;
}

.v-feature-text p {
  color: #718096;
  margin: 0;
  font-size: 0.9rem;
}

/* ---------- CTA Button ---------- */
.v-cta-btn {
  display: inline-block;
  padding: 14px 36px;
  background: #FF6B35;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  transition: background 0.2s;
}

.v-cta-btn:hover {
  background: #E55A2B;
}

/* ============================================================
   Curriculum Page
   ============================================================ */
.curriculum-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.curriculum-stage {
  flex: 1 1 100%;
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.curriculum-grade-block {
  margin: 20px 0;
  padding: 16px;
  background: #F7FAFC;
  border-radius: 10px;
}

.curriculum-grade-title {
  color: #4A90D9;
  font-size: 1.2rem;
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid #4A90D9;
}

.curriculum-semester {
  margin-bottom: 16px;
}

.curriculum-semester-title {
  color: #FF6B35;
  font-size: 1.05rem;
  margin: 0 0 10px;
}

.curriculum-unit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 12px;
}

.curriculum-unit-card {
  background: #fff;
  border: 1px solid #E2E8F0;
  border-radius: 10px;
  padding: 14px;
  transition: box-shadow 0.2s;
}

.curriculum-unit-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.curriculum-unit-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.curriculum-unit-num {
  background: #4A90D9;
  color: #fff;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

.curriculum-unit-name {
  font-weight: 700;
  color: #2D3748;
  font-size: 0.95rem;
}

.curriculum-unit-topic {
  color: #718096;
  font-size: 0.85rem;
  margin: 0 0 10px;
  padding-left: 4px;
}

.curriculum-kp {
  background: #F0F7FF;
  border-radius: 8px;
  padding: 10px 12px;
  margin: 6px 0;
  font-size: 0.9rem;
}

.curriculum-kp-placeholder {
  background: #FFF5F0;
  color: #718096;
  font-style: italic;
}

.curriculum-kp-tag {
  display: inline-block;
  background: #FF6B35;
  color: #fff;
  padding: 1px 8px;
  border-radius: 8px;
  font-size: 0.7rem;
  font-weight: 600;
  margin-right: 6px;
  margin-bottom: 4px;
}

.curriculum-kp-zhongkao {
  display: inline-block;
  background: #FFF5F0;
  color: #FF6B35;
  padding: 1px 8px;
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 500;
  margin-left: 4px;
}

.curriculum-kp-detail {
  margin-top: 8px;
  color: #4A5568;
  font-size: 0.85rem;
  line-height: 1.5;
}

.curriculum-kp-detail p {
  margin: 2px 0;
}

.curriculum-oral-practice {
  margin-top: 8px;
  padding: 8px 12px;
  background: #FFF5F0;
  border-radius: 8px;
  font-size: 0.85rem;
}

.curriculum-oral-practice summary {
  cursor: pointer;
  color: #FF6B35;
  font-weight: 600;
}

.curriculum-op-item {
  margin: 8px 0;
  padding: 8px;
  background: #fff;
  border-radius: 6px;
}

.curriculum-op-item strong {
  color: #2D3748;
}

.curriculum-op-item p {
  color: #4A5568;
  font-size: 0.85rem;
  margin: 4px 0 0;
}

.curriculum-practice-link {
  display: inline-block;
  margin-top: 10px;
  padding: 6px 14px;
  background: #F0F7FF;
  color: #4A90D9;
  text-decoration: none;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.2s;
}

.curriculum-practice-link:hover {
  background: #4A90D9;
  color: #fff;
}

/* ============================================================
   Lesson Breakdown & Courseware Display
   ============================================================ */
.curriculum-lessons-breakdown {
  margin-top: 12px;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  overflow: hidden;
}

.curriculum-lessons-header {
  background: #F0F7FF;
  padding: 8px 14px;
  font-weight: 700;
  font-size: 0.85rem;
  color: #4A90D9;
  border-bottom: 1px solid #E2E8F0;
}

.curriculum-lesson-item {
  display: flex;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid #F0F7FF;
  align-items: flex-start;
}

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

.curriculum-lesson-badge {
  background: #4A90D9;
  color: #fff;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.72rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 2px;
}

.curriculum-lesson-content {
  flex: 1;
  min-width: 0;
}

.curriculum-lesson-content strong {
  font-size: 0.88rem;
  color: #2D3748;
}

.curriculum-lesson-focus {
  font-size: 0.8rem;
  color: #718096;
  margin: 2px 0;
}

.curriculum-lesson-words {
  display: flex;
  gap: 6px;
  font-size: 0.78rem;
  color: #4A5568;
  margin: 2px 0;
}

.words-label {
  font-weight: 600;
  color: #FF6B35;
  flex-shrink: 0;
}

/* Courseware (G7) */
.curriculum-courseware {
  margin-top: 12px;
  border: 2px solid #FF6B35;
  border-radius: 10px;
}

.curriculum-courseware summary {
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 700;
  color: #FF6B35;
  font-size: 0.9rem;
  background: linear-gradient(135deg, #FFF5F0, #fff);
}

.courseware-body {
  padding: 12px;
}

.courseware-lesson {
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 14px;
  background: #fff;
}

.courseware-lesson-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid #F0F7FF;
}

.courseware-lesson-num {
  background: #FF6B35;
  color: #fff;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 700;
  white-space: nowrap;
}

.courseware-phase-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 0.72rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.courseware-phase-tag.preview {
  background: #F0FFF4;
  color: #38A169;
}

.courseware-phase-tag.teaching {
  background: #F0F7FF;
  color: #4A90D9;
}

.courseware-phase-tag.practice {
  background: #FFF8E6;
  color: #B7791F;
}

.courseware-phase-tag.review {
  background: #F3E8FF;
  color: #7C3AED;
}

.courseware-phase-tag.homework {
  background: #FFF5F0;
  color: #FF6B35;
}

.courseware-preview,
.courseware-slides,
.courseware-practice,
.courseware-review,
.courseware-homework {
  margin: 10px 0;
  padding: 10px;
  border-radius: 6px;
}

.courseware-preview {
  background: #F0FFF4;
}

.courseware-preview p {
  font-size: 0.82rem;
  color: #4A5568;
  margin: 4px 0 0;
}

.courseware-slides {
  background: #F7FAFC;
}

.courseware-slide {
  display: flex;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px dashed #E2E8F0;
}

.courseware-slide:last-child {
  border-bottom: none;
}

.slide-num {
  background: #4A90D9;
  color: #fff;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}

.slide-content {
  font-size: 0.82rem;
  color: #2D3748;
  margin: 2px 0;
}

.slide-notes {
  font-size: 0.75rem;
  color: #718096;
  margin: 2px 0;
  font-style: italic;
}

.courseware-practice {
  background: #FFF8E6;
}

.courseware-practice-item {
  display: flex;
  gap: 8px;
  padding: 4px 0;
  font-size: 0.82rem;
  color: #4A5568;
}

.courseware-review {
  background: #F3E8FF;
}

.courseware-review > p {
  font-size: 0.82rem;
  color: #4A5568;
  margin: 4px 0;
}

.review-questions {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 4px;
}

.review-q {
  font-size: 0.8rem;
  color: #6D28D9;
}

.courseware-homework {
  background: #FFF5F0;
}

.homework-exercise {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 6px 0;
  border-bottom: 1px solid #FFE4D0;
}

.homework-exercise:last-of-type {
  border-bottom: none;
}

.homework-ex-type {
  background: #FF6B35;
  color: #fff;
  padding: 2px 8px;
  border-radius: 8px;
  font-size: 0.7rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.homework-ex-q {
  font-size: 0.82rem;
  color: #2D3748;
  margin: 0;
}

.homework-ex-a {
  font-size: 0.78rem;
  color: #38A169;
  margin: 2px 0 0;
  font-weight: 600;
}

.courseware-error-tags {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid #FFE4D0;
  font-size: 0.8rem;
  color: #4A5568;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
}

.error-tag {
  background: #FED7D7;
  color: #E53E3E;
  padding: 2px 8px;
  border-radius: 8px;
  font-size: 0.72rem;
  font-weight: 600;
}

.homework-item {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 4px 0;
  font-size: 0.82rem;
  color: #4A5568;
}

.homework-type {
  background: #4A90D9;
  color: #fff;
  padding: 1px 8px;
  border-radius: 8px;
  font-size: 0.7rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Keep old lesson-plan styles for backward compatibility */
.curriculum-lesson-plan {
  margin-top: 12px;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
}

.curriculum-lesson-plan summary {
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
  color: #FF6B35;
  font-size: 0.9rem;
  background: #FFF5F0;
  border-radius: 8px;
}

.lesson-plan-body {
  padding: 12px 14px;
}

.lesson-plan-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.lesson-plan-tag {
  background: #F0F7FF;
  color: #4A5568;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
}

.lesson-plan-class {
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 10px;
  background: #fff;
}

.lesson-plan-class-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.lesson-plan-class-num {
  background: #4A90D9;
  color: #fff;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.lesson-plan-obj {
  font-size: 0.85rem;
  color: #2D3748;
  margin: 6px 0;
}

.lesson-plan-activities {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 8px 0;
}

.lesson-plan-phase {
  display: flex;
  gap: 8px;
  font-size: 0.82rem;
  color: #4A5568;
  align-items: baseline;
  padding: 3px 0;
}

.phase-label {
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.72rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.phase-label.warmup {
  background: #F0FFF4;
  color: #38A169;
}

.phase-label.teaching {
  background: #F0F7FF;
  color: #4A90D9;
}

.phase-label.practice {
  background: #FFF8E6;
  color: #B7791F;
}

.phase-label.wrapup {
  background: #FFF5F0;
  color: #FF6B35;
}

.lesson-plan-homework {
  margin-top: 10px;
  padding: 10px 12px;
  background: #F7FAFC;
  border-radius: 6px;
}

.lesson-plan-homework > strong {
  font-size: 0.85rem;
  color: #2D3748;
}

/* ============================================================
   Grade Tabs Navigation
   ============================================================ */
.grade-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin: 16px 0 24px;
  position: sticky;
  top: 52px;
  z-index: 50;
  background: #F0F7FF;
  padding: 10px;
  border-radius: 12px;
}

.grade-tab {
  padding: 8px 16px;
  border: 1px solid #E2E8F0;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  background: #fff;
  color: #4A5568;
  transition: all 0.2s;
}

.grade-tab:hover {
  border-color: #4A90D9;
  color: #4A90D9;
}

.grade-tab.active {
  background: #4A90D9;
  color: #fff;
  border-color: #4A90D9;
}

.grade-tab.junior.active {
  background: #FF6B35;
  border-color: #FF6B35;
}

.curriculum-grade-block {
  display: none;
}

.curriculum-grade-block.visible {
  display: block;
}

.curriculum-stage h3 {
  display: block;
}

.curriculum-stage.has-visible h3 {
  color: #4A90D9;
}

/* Collapse knowledge points by default */
.curriculum-kp-detail {
  display: none;
}

.curriculum-kp.expanded .curriculum-kp-detail {
  display: block;
}

.curriculum-kp {
  cursor: pointer;
}

.curriculum-kp::before {
  content: "▶ ";
  font-size: 0.7rem;
  color: #FF6B35;
}

.curriculum-kp.expanded::before {
  content: "▼ ";
}

/* Zhongkao module grid */
.curriculum-zk-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.curriculum-zk-module {
  background: #fff;
  border: 1px solid #E2E8F0;
  border-radius: 12px;
  padding: 18px;
}

.curriculum-zk-module-title {
  color: #FF6B35;
  font-size: 1.1rem;
  margin: 0 0 8px;
}

.curriculum-zk-module-desc {
  color: #718096;
  font-size: 0.9rem;
  margin: 0 0 10px;
}

.curriculum-zk-points {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.curriculum-zk-point {
  padding: 8px 0;
  border-bottom: 1px solid #E2E8F0;
}

.curriculum-zk-point:last-child {
  border-bottom: none;
}

.curriculum-zk-point summary {
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: #2D3748;
}

.curriculum-zk-point summary::-webkit-details-marker {
  display: none;
}

.curriculum-zk-point summary::before {
  content: "▶";
  font-size: 0.7rem;
  color: #718096;
  transition: transform 0.2s;
}

.curriculum-zk-point[open] summary::before {
  transform: rotate(90deg);
}

.curriculum-zk-topic {
  flex: 1 1 auto;
}

.curriculum-zk-difficulty {
  font-size: 0.75rem;
  font-weight: 500;
  color: #E53E3E;
  white-space: nowrap;
}

.curriculum-zk-detail {
  margin-top: 8px;
  padding: 10px;
  background: #F7FAFC;
  border-radius: 8px;
  font-size: 0.9rem;
  color: #4A5568;
}

.curriculum-zk-detail ul {
  padding-left: 16px;
  margin: 6px 0;
}

.curriculum-zk-oral {
  margin-top: 6px;
  padding: 8px 10px;
  background: #FFF5F0;
  border-radius: 6px;
  font-size: 0.85rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .site-header .container {
    flex-wrap: wrap;
    gap: 8px;
  }
  .nav-toggle {
    display: block;
  }
  .site-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 2px;
  }
  .site-nav.open {
    display: flex;
  }
  .nav-group {
    width: 100%;
  }
  .nav-group-label {
    width: 100%;
    padding: 10px 14px;
  }
  .nav-dropdown {
    position: static;
    box-shadow: none;
    border: none;
    border-radius: 0;
    padding: 0 0 0 12px;
    display: none;
    background: #F7FAFC;
  }
  .nav-group.open .nav-dropdown {
    display: block;
  }
  .nav-dropdown .page-link {
    padding: 8px 14px;
  }
  .v-section {
    padding: 28px 16px;
  }
  .v-section-title {
    font-size: 1.25rem;
  }
  .v-feature-grid {
    grid-template-columns: 1fr;
  }
  .curriculum-unit-grid {
    grid-template-columns: 1fr;
  }
  .curriculum-zk-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 400px) {
  .site-title {
    font-size: 1rem;
  }
  .page-link {
    font-size: 0.85rem;
  }
  .v-cta-btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }
}
@media print {
  .site-header {
    display: none;
  }
}

/*# sourceMappingURL=main.css.map */