/* ==========================================================================
   宝贝云 (Baobei Cloud) 品牌官方网站 · 全站核心样式表
   框架编号: 33 樱花飘落 (自然治愈系)
   遵循 Modern Responsive Design, Accessible UX, High Performance
   ========================================================================== */

/* 1. CSS 变量与设计系统定义 */
:root {
  /* 品牌色系：樱花自然治愈 */
  --sakura-50: #fff5f7;
  --sakura-100: #ffeef2;
  --sakura-200: #ffdbe3;
  --sakura-300: #ffb8cb;
  --sakura-400: #ff85a1;
  --sakura-500: #ff5c8a;
  --sakura-600: #e03164;
  --sakura-700: #b81f4a;

  /* 中性色与背景 */
  --bg-body: #fdfafb;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-subtle: #fff8f9;

  /* 文字颜色 */
  --text-main: #1e2530;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-light: #a0aec0;
  --text-inverse: #ffffff;

  /* 边框与毛玻璃 */
  --border-subtle: rgba(255, 183, 197, 0.35);
  --border-card: rgba(255, 183, 197, 0.45);
  --border-card-hover: rgba(224, 49, 100, 0.4);
  --glass-bg: rgba(255, 255, 255, 0.86);
  --glass-nav: rgba(255, 253, 254, 0.9);

  /* 阴影层次 */
  --shadow-sm: 0 2px 8px rgba(224, 49, 100, 0.06);
  --shadow-md: 0 8px 24px rgba(224, 49, 100, 0.08);
  --shadow-lg: 0 16px 36px rgba(224, 49, 100, 0.12);
  --shadow-hover: 0 20px 40px rgba(224, 49, 100, 0.16);

  /* 间距与尺寸 */
  --nav-height: 72px;
  --max-width: 1200px;
  --border-radius-sm: 10px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
  --border-radius-pill: 9999px;

  /* 渐变体系 */
  --grad-primary: linear-gradient(135deg, #ff7597 0%, #e03164 100%);
  --grad-primary-hover: linear-gradient(135deg, #ff5c8a 0%, #c92253 100%);
  --grad-card: linear-gradient(180deg, #ffffff 0%, #fffcfd 100%);
  --grad-hero: linear-gradient(180deg, #fff2f5 0%, #fffbfc 60%, #fdfafb 100%);

  /* 缓动曲线 */
  --transition-normal: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 2. 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-main);
  background-color: var(--bg-body);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
  overflow-x: hidden;
  min-height: 100vh;
  background-image: 
    radial-gradient(circle at 15% 10%, rgba(255, 230, 236, 0.7) 0%, transparent 40%),
    radial-gradient(circle at 85% 30%, rgba(255, 240, 245, 0.8) 0%, transparent 45%),
    radial-gradient(circle at 50% 80%, rgba(255, 235, 240, 0.6) 0%, transparent 50%);
  background-repeat: no-repeat;
  background-attachment: fixed;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-normal);
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

/* 锚点偏移量，防止被固定导航栏遮挡 */
section[id], div[id] {
  scroll-margin-top: calc(var(--nav-height) + 24px);
}

/* 容器规范 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 3. 顶部固定导航栏 (Fixed / Sticky Header) */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: var(--glass-nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(224, 49, 100, 0.08);
  background: rgba(255, 255, 255, 0.95);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* 品牌 LOGO */
.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  z-index: 1002;
}

.brand-logo-img {
  height: 42px;
  width: auto;
  transition: transform var(--transition-normal);
}

.brand-link:hover .brand-logo-img {
  transform: scale(1.03);
}

/* 导航链接 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 2px;
  transition: color var(--transition-normal);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--grad-primary);
  border-radius: 2px;
  transition: width var(--transition-normal), left var(--transition-normal);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
  left: 0;
}

.nav-menu-cta {
  display: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 汉堡菜单按钮 (移动端专用) */
.mobile-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-sm);
  background: var(--sakura-50);
  border: 1px solid var(--border-subtle);
  color: var(--sakura-600);
  align-items: center;
  justify-content: center;
  z-index: 1002;
}

.hamburger-line {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--sakura-600);
  margin: 4px auto;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.mobile-toggle.active .hamburger-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.mobile-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active .hamburger-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* 4. 按钮系统 (Button System) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--border-radius-pill);
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--grad-primary);
  color: var(--text-inverse);
  box-shadow: 0 6px 18px rgba(224, 49, 100, 0.28);
}

.btn-primary:hover {
  background: var(--grad-primary-hover);
  box-shadow: 0 8px 24px rgba(224, 49, 100, 0.4);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.9);
  color: var(--sakura-600);
  border: 1.5px solid var(--border-card);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--sakura-50);
  border-color: var(--sakura-400);
  color: var(--sakura-700);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 7px 18px;
  font-size: 0.85rem;
}

.btn-full {
  width: 100%;
}

/* 5. 第 1 区：首屏 Hero 区块 */
.hero-section {
  position: relative;
  padding-top: 60px;
  padding-bottom: 90px;
  background: var(--grad-hero);
  overflow: hidden;
}

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

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--sakura-100);
  border: 1px solid var(--border-card);
  border-radius: var(--border-radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--sakura-600);
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-title .highlight {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-desc {
  font-size: 1.12rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 580px;
}

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

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.hero-badge-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.hero-badge-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--sakura-100);
  color: var(--sakura-600);
  font-size: 0.8rem;
}

/* Hero 右侧动态卡片 (樱花治愈视觉主体) */
.hero-visual-card {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--border-card);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overflow: hidden;
  transition: transform var(--transition-smooth);
}

.hero-visual-card:hover {
  transform: translateY(-4px);
}

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

.visual-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.visual-badge {
  font-size: 0.78rem;
  font-weight: 600;
  color: #27ae60;
  background: #eafaf1;
  padding: 4px 10px;
  border-radius: var(--border-radius-pill);
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #27ae60;
  box-shadow: 0 0 8px #27ae60;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.metric-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--border-radius-md);
  padding: 16px;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.metric-item:hover {
  transform: translateY(-2px);
  border-color: var(--sakura-400);
}

.metric-value {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--sakura-600);
  line-height: 1.2;
}

.metric-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.visual-stream-bar {
  background: var(--sakura-50);
  border-radius: var(--border-radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px dashed var(--border-card);
}

.stream-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--sakura-700);
}

.stream-icons {
  display: flex;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* 6. 通用区块标题与间距规范 */
.section {
  padding-top: 80px;
  padding-bottom: 80px;
  position: relative;
}

.section-alt {
  background: var(--bg-subtle);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 54px auto;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--sakura-600);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
  padding: 4px 12px;
  background: var(--sakura-100);
  border-radius: var(--border-radius-pill);
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  line-height: 1.3;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 7. 第 2 区：品牌优势与知识专题 (#knowledge) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--border-radius-lg);
  padding: 28px 22px;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-card-hover);
}

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--border-radius-md);
  background: var(--sakura-100);
  color: var(--sakura-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  transition: transform var(--transition-normal);
}

.feature-card:hover .feature-icon-wrap {
  transform: scale(1.1) rotate(4deg);
  background: var(--grad-primary);
  color: #ffffff;
}

.feature-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 知识专题推荐条 */
.knowledge-banner {
  background: var(--glass-bg);
  border: 1px solid var(--border-card);
  border-radius: var(--border-radius-lg);
  padding: 30px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  box-shadow: var(--shadow-md);
}

.knowledge-banner-content h4 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.knowledge-banner-content p {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* 8. 第 3 区：套餐价格 (#plans) —— 严格基于截图 */
.pricing-section {
  position: relative;
}

/* 周期切换器 */
.pricing-switch-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--sakura-100);
  padding: 6px;
  border-radius: var(--border-radius-pill);
  max-width: 560px;
  width: 100%;
  margin: 0 auto 48px auto;
  border: 1px solid var(--border-subtle);
}

.pricing-switch-btn {
  flex: 1;
  padding: 10px 18px;
  border-radius: var(--border-radius-pill);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-normal);
  text-align: center;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.pricing-switch-btn.active {
  background: var(--bg-surface);
  color: var(--sakura-600);
  box-shadow: 0 4px 12px rgba(224, 49, 100, 0.15);
}

/* 套餐卡片网格 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border-card);
  border-radius: var(--border-radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-smooth);
  box-shadow: var(--shadow-sm);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--sakura-400);
}

.pricing-card.featured {
  border-color: var(--sakura-500);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(180deg, #ffffff 0%, #fff7f9 100%);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad-primary);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--border-radius-pill);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 10px rgba(224, 49, 100, 0.3);
}

.plan-header {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 24px;
}

.currency-sym {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--sakura-600);
}

.price-amount {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
}

.price-period {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* 核心特性列表 */
.plan-features {
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.feature-check {
  color: var(--sakura-600);
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-notice {
  text-align: center;
  margin-top: 36px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* 9. 第 4 区：使用教程与配置流程 (#timeline) */
.tutorial-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 48px;
  position: relative;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--border-radius-lg);
  padding: 32px 26px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal);
}

.step-card:hover {
  transform: translateY(-4px);
  border-color: var(--sakura-400);
}

.step-num {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 2rem;
  font-weight: 900;
  color: var(--sakura-200);
  line-height: 1;
}

.step-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--sakura-100);
  color: var(--sakura-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 20px;
}

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

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

/* 客户端支持标签 */
.client-platforms {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.platform-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  border-radius: var(--border-radius-md);
  background: var(--sakura-50);
  transition: all var(--transition-normal);
}

.platform-item:hover {
  background: var(--sakura-100);
  transform: translateY(-2px);
}

.platform-icon {
  font-size: 1.6rem;
}

.platform-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.platform-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 10. 第 5 区：原创文章 (#articles) */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 36px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--border-radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-hover);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.article-category {
  color: var(--sakura-600);
  background: var(--sakura-100);
  padding: 3px 10px;
  border-radius: var(--border-radius-pill);
  font-weight: 600;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 12px;
  transition: color var(--transition-normal);
}

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

.article-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--sakura-600);
  margin-top: auto;
}

.article-read-more .arrow {
  transition: transform var(--transition-normal);
}

.article-card:hover .article-read-more .arrow {
  transform: translateX(4px);
}

/* 11. 第 6 区：真实评价与反馈区 (#feedback) */
.feedback-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}

.feedback-intro {
  padding-right: 20px;
}

.feedback-intro h3 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
}

.feedback-intro p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.feedback-commitments {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.commitment-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-main);
  font-weight: 500;
}

.commitment-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--sakura-100);
  color: var(--sakura-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

.feedback-form-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
}

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

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--border-radius-md);
  background: #ffffff;
  font-size: 0.92rem;
  color: var(--text-main);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.form-control:focus {
  outline: none;
  border-color: var(--sakura-500);
  box-shadow: 0 0 0 3px rgba(255, 92, 138, 0.2);
}

textarea.form-control {
  resize: vertical;
  min-height: 90px;
}

.form-submit-tip {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 10px;
  text-align: center;
}

/* 12. 第 7 区：常见问题 FAQ (#faq) */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--border-radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.faq-item:hover {
  border-color: var(--sakura-400);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  background: none;
}

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--sakura-50);
  color: var(--sakura-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 400;
  flex-shrink: 0;
  transition: transform var(--transition-normal), background-color var(--transition-normal);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--sakura-500);
  color: #ffffff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
}

.faq-answer-inner {
  padding: 0 24px 22px 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px dashed var(--border-subtle);
  padding-top: 16px;
}

/* 13. 第 8 区：语义化页脚 (Site Footer) */
.site-footer {
  background: #1e2430;
  color: #a0aec0;
  padding-top: 70px;
  padding-bottom: 30px;
  position: relative;
  z-index: 10;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: #a0aec0;
  margin-bottom: 20px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
}

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

.footer-links a {
  color: #cbd5e0;
  font-size: 0.9rem;
  transition: color var(--transition-normal), transform var(--transition-normal);
  display: inline-block;
}

.footer-links a:hover {
  color: #ff85a1;
  transform: translateX(3px);
}

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copy {
  color: #718096;
}

.footer-badges {
  display: flex;
  gap: 16px;
}

.footer-badge-pill {
  padding: 4px 10px;
  border-radius: var(--border-radius-pill);
  background: rgba(255, 255, 255, 0.05);
  font-size: 0.78rem;
  color: #a0aec0;
}

/* 14. 滚动显现微动效 (Scroll Reveal Animations) */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  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.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.18s; }
.reveal-delay-3 { transition-delay: 0.26s; }
.reveal-delay-4 { transition-delay: 0.34s; }

/* 15. 文章详情页通用样式 (Article Details Layout) */
.article-page-body {
  padding-top: 40px;
  padding-bottom: 80px;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.article-breadcrumb a:hover {
  color: var(--sakura-600);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: start;
}

.article-main-content {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.article-header {
  margin-bottom: 30px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-header h1 {
  font-size: clamp(1.8rem, 3.2vw, 2.3rem);
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 14px;
}

.article-post-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-body-text {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #2d3748;
}

.article-body-text h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 36px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--sakura-100);
}

.article-body-text h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 28px;
  margin-bottom: 12px;
}

.article-body-text p {
  margin-bottom: 20px;
}

.article-body-text ul, .article-body-text ol {
  margin-bottom: 22px;
  padding-left: 24px;
}

.article-body-text li {
  margin-bottom: 8px;
  list-style: disc;
}

.article-body-text ol li {
  list-style: decimal;
}

.article-callout {
  background: var(--sakura-50);
  border-left: 4px solid var(--sakura-500);
  border-radius: var(--border-radius-sm);
  padding: 18px 20px;
  margin: 24px 0;
  font-size: 0.98rem;
  color: var(--text-secondary);
}

.article-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 24px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.sidebar-widget h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

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

.toc-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.4;
  padding-left: 10px;
  border-left: 2px solid transparent;
  transition: all var(--transition-normal);
}

.toc-link:hover, .toc-link.active {
  color: var(--sakura-600);
  border-left-color: var(--sakura-500);
  font-weight: 600;
}

/* 16. 响应式布局优化 (Responsive Breakpoints) */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 440px;
    margin: 0 auto;
  }

  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }

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

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

  .feedback-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--nav-height));
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: flex-start;
    padding: 30px 24px;
    gap: 20px;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    z-index: 999;
    overflow-y: auto;
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  .nav-link {
    font-size: 1.15rem;
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid var(--sakura-100);
  }

  .nav-actions .btn-primary {
    display: none; /* 移动端在菜单内部显示 */
  }

  .nav-menu-cta {
    width: 100%;
    margin-top: 20px;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero-section {
    padding-top: 36px;
    padding-bottom: 60px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

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

  .knowledge-banner {
    flex-direction: column;
    text-align: center;
  }

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

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

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

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .article-main-content {
    padding: 24px 18px;
  }
}

@media (max-width: 428px) {
  .hero-title {
    font-size: 1.8rem;
  }

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

  .pricing-switch-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    border-radius: var(--border-radius-md);
    gap: 8px;
    padding: 6px;
  }

  .pricing-switch-btn {
    width: 100%;
    padding: 9px 8px;
    font-size: 0.88rem;
  }

  .price-amount {
    font-size: 2.2rem;
  }
}

/* 17. 右下角悬浮客服 LOGO 组件 (Floating Customer Service Widget) */
.floating-service-widget {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-direction: row-reverse;
}

.service-float-btn {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--grad-primary);
  box-shadow: 0 10px 28px rgba(224, 49, 100, 0.38);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  border: 2px solid rgba(255, 255, 255, 0.85);
  outline: none;
}

.service-float-btn:hover {
  transform: scale(1.08) translateY(-2px);
  box-shadow: 0 14px 34px rgba(224, 49, 100, 0.5);
}

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

.service-logo-svg {
  width: 34px;
  height: 34px;
  pointer-events: none;
}

/* 在线状态绿点与呼吸微光 */
.service-online-dot {
  position: absolute;
  top: 1px;
  right: 1px;
  width: 14px;
  height: 14px;
  background-color: #2ecc71;
  border: 2.5px solid #ffffff;
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(46, 204, 113, 0.8);
}

.service-online-dot::after {
  content: '';
  position: absolute;
  top: -2.5px;
  left: -2.5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid #2ecc71;
  animation: rippleOnline 2.2s infinite ease-out;
}

@keyframes rippleOnline {
  0% { transform: scale(1); opacity: 0.9; }
  100% { transform: scale(2.4); opacity: 0; }
}

/* 悬停气泡提示 */
.service-float-tooltip {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-card);
  padding: 8px 16px;
  border-radius: var(--border-radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--sakura-700);
  box-shadow: var(--shadow-md);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translateX(10px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.floating-service-widget:hover .service-float-tooltip,
.service-float-tooltip.visible {
  opacity: 1;
  transform: translateX(0);
}

@media (max-width: 768px) {
  .floating-service-widget {
    right: 20px;
    bottom: 20px;
  }
  .service-float-btn {
    width: 50px;
    height: 50px;
  }
  .service-logo-svg {
    width: 28px;
    height: 28px;
  }
  .service-float-tooltip {
    display: none; /* 移动端隐藏文字气泡，保持界面简洁 */
  }
}

/* 减少动效支持 */
@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 {
    opacity: 1 !important;
    transform: none !important;
  }
}