/* ==========================================================================
   第83号 樱花校园 · 日式手账留白 · 飘落樱花与笔记本式章节排版 专属样式
   ========================================================================== */

/* 樱花飘落画布 - 背景层 */
#sakura-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
  opacity: 0.85;
}

/* 纵向连续章节排版体系 */
.page-wrapper {
  position: relative;
  z-index: 20;
}

.notebook-chapter-section {
  position: relative;
  padding: 80px 0;
  border-bottom: 1px solid rgba(240, 222, 229, 0.6);
}

.notebook-chapter-section:nth-child(even) {
  background: linear-gradient(180deg, rgba(255, 247, 249, 0.4) 0%, rgba(255, 255, 255, 0.6) 100%);
}

/* 和纸胶带 / 章节印章标题系统 */
.chapter-badge-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
}

.washi-tape-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: #FFEAF0;
  border: 1px dashed var(--sakura-400);
  border-radius: 4px;
  box-shadow: 0 2px 6px rgba(230, 57, 104, 0.08);
  transform: rotate(-1deg);
  transition: transform 0.3s ease;
}

.washi-tape-badge:hover {
  transform: rotate(0deg) scale(1.02);
}

.washi-tape-badge .chapter-num {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--sakura-600);
  letter-spacing: 1.5px;
}

.washi-tape-badge .chapter-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-800);
  border-left: 1px solid var(--sakura-300);
  padding-left: 8px;
}

.section-header-block {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 52px;
}

.section-main-heading {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--ink-900);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  line-height: 1.3;
}

.section-sub-desc {
  font-size: 1.05rem;
  color: var(--ink-700);
  line-height: 1.7;
}

/* 留白与笔记本卡片基础 */
.notebook-paper-card {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.notebook-paper-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-accent);
}

/* --------------------------------------------------------------------------
   第一章：首屏 Hero (#hero)
   -------------------------------------------------------------------------- */
.hero-chapter-section {
  padding: 60px 0 90px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-brand-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #FFF0F3;
  border: 1px solid var(--sakura-300);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--sakura-600);
  margin-bottom: 20px;
}

.hero-brand-tag .dot {
  width: 8px;
  height: 8px;
  background-color: var(--sakura-500);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-h1-title {
  font-size: 2.85rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--ink-900);
  margin-bottom: 20px;
  letter-spacing: -0.8px;
}

.hero-h1-title .sakura-highlight {
  color: var(--sakura-600);
  background: linear-gradient(180deg, transparent 65%, #FFEAF0 65%);
  padding: 0 4px;
}

.hero-desc-p {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--ink-700);
  margin-bottom: 32px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
}

/* 首屏特征速览手账卡片 */
.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1px dashed var(--border-soft);
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
}

.stat-val {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--ink-900);
  line-height: 1.2;
}

.stat-val span {
  font-size: 0.95rem;
  color: var(--sakura-600);
}

.stat-label {
  font-size: 0.82rem;
  color: var(--ink-500);
  margin-top: 4px;
}

/* 首屏右侧手账画板视觉 */
.hero-visual-card {
  background: #FFFFFF;
  border: 1px solid var(--border-soft);
  border-radius: 24px;
  padding: 32px;
  box-shadow: 0 20px 48px rgba(230, 57, 104, 0.08);
  position: relative;
}

.hero-notebook-binder {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 16px;
}

.binder-ring {
  width: 14px;
  height: 24px;
  background: linear-gradient(180deg, #E2D3D8 0%, #BFC0C0 100%);
  border-radius: 7px;
  box-shadow: inset 0 1px 2px rgba(255,255,255,0.8), 0 2px 4px rgba(0,0,0,0.15);
}

.hero-visual-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--border-soft);
}

.visual-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink-900);
}

.visual-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--matcha-500);
  background: var(--matcha-100);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}

.hero-server-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.server-node-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--paper-bg);
  border-radius: 12px;
  border: 1px solid var(--border-soft);
  transition: background 0.2s ease;
}

.server-node-row:hover {
  background: #FFF7F9;
  border-color: var(--border-accent);
}

.node-info-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-flag {
  font-size: 1.2rem;
}

.node-name {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--ink-900);
}

.node-meta {
  font-size: 0.78rem;
  color: var(--ink-500);
}

.node-latency {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", monospace;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--matcha-500);
  background: #E8F5E9;
  padding: 3px 8px;
  border-radius: 6px;
}

/* --------------------------------------------------------------------------
   第二章：品牌优势与知识专题 (#knowledge)
   -------------------------------------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-box {
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
}

.feature-icon-badge {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, #FFEAF0 0%, #FFF0F3 100%);
  border: 1px solid var(--sakura-300);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sakura-600);
  font-size: 1.5rem;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(230, 57, 104, 0.08);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--ink-700);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   第三章：套餐价格展示 (#plans)
   -------------------------------------------------------------------------- */
.plans-toggle-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  background: #FFFFFF;
  padding: 6px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-soft);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.03);
}

.plan-tab-btn {
  flex: 1;
  padding: 10px 16px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink-700);
  border-radius: var(--radius-pill);
  transition: all 0.25s ease;
  text-align: center;
}

.plan-tab-btn.active {
  background: linear-gradient(135deg, var(--sakura-500) 0%, var(--sakura-600) 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(230, 57, 104, 0.25);
}

.pricing-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  background: #FFFFFF;
}

.pricing-card.featured {
  border: 2px solid var(--sakura-400);
  box-shadow: 0 16px 40px rgba(230, 57, 104, 0.14);
  transform: scale(1.02);
}

.card-ribbon {
  position: absolute;
  top: 18px;
  right: -32px;
  background: linear-gradient(90deg, var(--sakura-500), var(--sakura-600));
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 38px;
  transform: rotate(45deg);
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  letter-spacing: 1px;
}

.plan-header {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px dashed var(--border-soft);
}

.plan-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--sakura-600);
  background: #FFF0F3;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--ink-900);
  margin-bottom: 8px;
}

.plan-cycle-tag {
  font-size: 0.88rem;
  color: var(--ink-500);
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-top: 16px;
}

.plan-currency {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--sakura-600);
}

.plan-amount {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--ink-900);
  line-height: 1;
  letter-spacing: -1px;
}

.plan-unit {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-500);
}

.plan-total-note {
  font-size: 0.82rem;
  color: var(--ink-500);
  margin-top: 6px;
}

.plan-features-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--ink-700);
  line-height: 1.5;
}

.feature-check-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #FFF0F3;
  color: var(--sakura-600);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 800;
  margin-top: 2px;
}

.pricing-card .btn-primary-cta {
  width: 100%;
}

.plans-guarantee-note {
  text-align: center;
  margin-top: 36px;
  padding: 18px 24px;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-soft);
  color: var(--ink-700);
  font-size: 0.92rem;
}

/* --------------------------------------------------------------------------
   第四章：使用教程与快速配置 (#timeline)
   -------------------------------------------------------------------------- */
.tutorial-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  margin-bottom: 48px;
}

.step-card {
  padding: 28px 22px;
  position: relative;
  display: flex;
  flex-direction: column;
}

.step-number-tag {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--sakura-500);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  box-shadow: 0 4px 10px rgba(230, 57, 104, 0.25);
}

.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 10px;
}

.step-desc {
  font-size: 0.9rem;
  color: var(--ink-700);
  line-height: 1.6;
}

/* 客户端推荐徽标 */
.client-platforms-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.client-box {
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all 0.25s ease;
}

.client-box:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.client-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: #FFF0F3;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sakura-600);
  font-size: 1.3rem;
}

.client-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--ink-900);
}

.client-hint {
  font-size: 0.78rem;
  color: var(--ink-500);
}

/* --------------------------------------------------------------------------
   第五章：原创文章文库 (#articles)
   -------------------------------------------------------------------------- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-notebook-card {
  display: flex;
  flex-direction: column;
  padding: 30px 24px;
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  transition: all 0.3s ease;
}

.article-notebook-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md);
}

.article-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  font-size: 0.8rem;
  color: var(--ink-500);
}

.article-tag {
  background: #FFF0F3;
  color: var(--sakura-600);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-weight: 600;
}

.article-title-link {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 12px;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-title-link:hover {
  color: var(--sakura-600);
}

.article-summary-p {
  font-size: 0.92rem;
  color: var(--ink-700);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  padding-top: 16px;
  border-top: 1px dashed var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.read-more-btn {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--sakura-600);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.read-more-btn:hover {
  gap: 8px;
}

/* --------------------------------------------------------------------------
   第六章：真实用户体验评价墙与滚动模式 (#feedback)
   -------------------------------------------------------------------------- */
.reviews-marquee-wrapper {
  position: relative;
  width: 100%;
  overflow: hidden;
  padding: 12px 0 24px;
  mask-image: linear-gradient(to right, transparent 0%, black 5%, black 95%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 5%, black 95%, transparent 100%);
}

.reviews-marquee-track {
  display: flex;
  gap: 22px;
  width: max-content;
  padding: 8px 0;
  will-change: transform;
}

.reviews-marquee-track.track-row-1 {
  animation: marquee-scroll-left 42s linear infinite;
}

.reviews-marquee-track.track-row-2 {
  animation: marquee-scroll-right 46s linear infinite;
}

.reviews-marquee-wrapper:hover .reviews-marquee-track {
  animation-play-state: paused;
}

@keyframes marquee-scroll-left {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes marquee-scroll-right {
  0% { transform: translateX(-50%); }
  100% { transform: translateX(0); }
}

/* 评价卡片样式 (完全遵循图三模式) */
.review-card-item {
  width: 380px;
  max-width: 86vw;
  background: #FFFFFF;
  border: 1.5px solid var(--border-soft);
  border-radius: 20px;
  padding: 26px 24px;
  box-shadow: 0 8px 24px rgba(230, 57, 104, 0.05);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex-shrink: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.review-card-item:hover {
  transform: translateY(-5px);
  border-color: var(--sakura-400);
  box-shadow: 0 16px 36px rgba(230, 57, 104, 0.12);
}

.review-card-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.review-star-rating {
  color: #FFB703;
  font-size: 1.25rem;
  letter-spacing: 2px;
  text-shadow: 0 0 10px rgba(255, 183, 3, 0.35);
  display: flex;
  align-items: center;
}

.review-pill-tag {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--sakura-600);
  background: #FFF0F3;
  border: 1px solid var(--sakura-200);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.5px;
}

.review-card-headline {
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--ink-900);
  margin-bottom: 12px;
  line-height: 1.35;
}

.review-quote-body {
  font-size: 0.94rem;
  color: var(--ink-700);
  line-height: 1.72;
  margin-bottom: 22px;
  flex-grow: 1;
}

.review-profile-divider {
  height: 1px;
  border-top: 1px dashed var(--border-soft);
  margin-bottom: 16px;
}

.review-user-profile-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--sakura-400) 0%, var(--sakura-600) 100%);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(230, 57, 104, 0.25);
  flex-shrink: 0;
}

.review-user-text-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.review-user-fullname {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--ink-900);
  line-height: 1.3;
}

.review-user-scenario-tag {
  font-size: 0.8rem;
  color: var(--ink-500);
  margin-top: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 底部反馈提交抽屉与按钮 */
.feedback-action-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 36px;
  gap: 16px;
}

.btn-open-feedback {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: #FFFFFF;
  border: 1.5px dashed var(--sakura-400);
  color: var(--sakura-600);
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  transition: all 0.25s ease;
  cursor: pointer;
}

.btn-open-feedback:hover {
  background: #FFF0F3;
  border-color: var(--sakura-600);
  transform: translateY(-2px);
}

.feedback-collapsible-container {
  display: none;
  max-width: 640px;
  width: 100%;
  margin: 16px auto 0;
}

.feedback-collapsible-container.open {
  display: block;
  animation: fadeInDown 0.35s ease;
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.feedback-box-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

.feedback-intro-card {
  padding: 36px;
  background: #FFFFFF;
}

.feedback-intro-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--ink-900);
  margin-bottom: 16px;
}

.feedback-intro-text {
  font-size: 0.98rem;
  color: var(--ink-700);
  line-height: 1.8;
  margin-bottom: 24px;
}

.feedback-policy-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #FFF7F9;
  border: 1px dashed var(--sakura-300);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-size: 0.86rem;
  color: var(--sakura-700);
}

.feedback-form-card {
  padding: 36px;
  background: #FFFFFF;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-800);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: var(--paper-bg);
  font-size: 0.95rem;
  color: var(--ink-900);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.form-control:focus {
  border-color: var(--sakura-400);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(255, 117, 143, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
}

.feedback-submit-btn {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, var(--sakura-500) 0%, var(--sakura-600) 100%);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 0.98rem;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px rgba(230, 57, 104, 0.25);
  transition: all 0.25s ease;
}

.feedback-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(230, 57, 104, 0.35);
}

.feedback-success-msg {
  display: none;
  margin-top: 16px;
  padding: 12px 16px;
  background: #E8F5E9;
  border: 1px solid #A5D6A7;
  color: #2E7D32;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  text-align: center;
}

/* --------------------------------------------------------------------------
   第七章：常见问题 FAQ (#faq)
   -------------------------------------------------------------------------- */
.faq-accordion-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-accordion-item {
  background: #FFFFFF;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-accordion-item.open {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-sm);
}

.faq-accordion-trigger {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink-900);
  background: transparent;
  transition: color 0.2s ease;
}

.faq-accordion-trigger:hover {
  color: var(--sakura-600);
}

.faq-icon-arrow {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #FFF0F3;
  color: var(--sakura-600);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.faq-accordion-item.open .faq-icon-arrow {
  transform: rotate(180deg);
  background: var(--sakura-500);
  color: #FFFFFF;
}

.faq-accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.faq-accordion-body {
  padding: 0 24px 22px;
  font-size: 0.96rem;
  color: var(--ink-700);
  line-height: 1.75;
  border-top: 1px dashed rgba(240, 222, 229, 0.5);
  margin-top: 4px;
  padding-top: 16px;
}

/* --------------------------------------------------------------------------
   第八章：品牌页脚 (#footer)
   -------------------------------------------------------------------------- */
.site-footer {
  background: #FFFFFF;
  border-top: 1px solid var(--border-soft);
  padding: 68px 0 36px;
  position: relative;
  z-index: 20;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
}

.footer-logo-img {
  height: 42px;
  width: auto;
  margin-bottom: 16px;
}

.footer-brand-desc {
  font-size: 0.92rem;
  color: var(--ink-700);
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 320px;
}

.footer-col-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--sakura-500);
  border-radius: 2px;
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--ink-700);
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-block;
}

.footer-link:hover {
  color: var(--sakura-600);
  transform: translateX(3px);
}

.footer-bottom-bar {
  padding-top: 28px;
  border-top: 1px dashed var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--ink-500);
  flex-wrap: wrap;
  gap: 16px;
}

/* --------------------------------------------------------------------------
   滚动渐入与动效规范 (IntersectionObserver)
   -------------------------------------------------------------------------- */
.reveal-item {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1), transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-item.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* 错峰延迟 */
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

/* 减弱动画设置 (prefers-reduced-motion) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .reveal-item {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  #sakura-canvas {
    display: none !important;
  }
}

/* --------------------------------------------------------------------------
   响应式断点适配 (768px, 992px, 1200px)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual-card {
    max-width: 560px;
    margin: 0 auto;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-card.featured {
    transform: none;
    grid-column: span 2;
  }

  .tutorial-steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .client-platforms-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-top-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .notebook-chapter-section {
    padding: 60px 0;
  }

  .hero-h1-title {
    font-size: 2.15rem;
  }

  .section-main-heading {
    font-size: 1.8rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .pricing-cards-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card.featured {
    grid-column: span 1;
  }

  .tutorial-steps-grid {
    grid-template-columns: 1fr;
  }

  .client-platforms-row {
    grid-template-columns: 1fr;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }

  .feedback-box-wrap {
    grid-template-columns: 1fr;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}