/* ==========================================================================
   红杏云机场 (HongXing Cloud) - 极简高性能响应式原生样式表 (红白配色尊享版)
   零外部依赖 | 纯原生 CSS | 秒开极速加载 | 无障碍友好 (WCAG AAA/AA 对比度)
   ========================================================================== */

:root {
  /* 红白主题色彩系统 */
  --bg-primary: #ffffff;
  --bg-secondary: rgba(255, 248, 248, 0.72);
  --bg-card: #ffffff;
  --bg-card-hover: #fff3f3;
  --bg-table-stripe: #fef2f2;
  
  --text-main: #111827;
  --text-light: #374151;
  --text-muted: #6b7280;
  --text-accent: #dc2626;
  
  --primary: #dc2626;
  --primary-hover: #b91c1c;
  --primary-gradient: linear-gradient(135deg, #e11d48 0%, #dc2626 50%, #f97316 100%);
  --accent-glow: rgba(220, 38, 38, 0.12);
  
  --border-color: #fee2e2;
  --border-card: #fecaca;
  --border-focus: #dc2626;
  --success: #16a34a;
  --badge-bg: rgba(220, 38, 38, 0.08);
  
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --header-height: 72px;
  --transition-fast: 0.2s ease;
}

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

html {
  font-family: var(--font-stack);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: clip;
  background-color: var(--bg-primary);
  background-image: url("plum-branch-bg.svg");
  background-repeat: no-repeat;
  background-position: top center;
  background-size: 1920px auto;
  background-attachment: fixed;
}

/* 锚点滚动避开固定页眉 */
[id] {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

/* 辅助功能：键盘跳转 */
.skip-link {
  position: absolute;
  top: -60px;
  left: 16px;
  background: var(--primary);
  color: #ffffff;
  padding: 12px 20px;
  z-index: 9999;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 16px;
  outline: 3px solid var(--border-focus);
}

/* 容器 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 页眉与导航 (固定置顶不随页面滚动移动) */
.site-header {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
  box-shadow: 0 4px 16px rgba(220, 38, 38, 0.05);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.brand-logo-img {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  box-shadow: 0 2px 10px rgba(220, 38, 38, 0.22);
  transition: transform var(--transition-fast);
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.06);
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 900;
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  color: var(--text-light);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: color var(--transition-fast);
  padding: 8px 4px;
  position: relative;
}

.nav-link:hover, .nav-link:focus-visible {
  color: var(--text-accent);
}

.nav-link.active {
  color: var(--text-accent);
  font-weight: 700;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 8px 22px;
  background: var(--primary-gradient);
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(220, 38, 38, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-cta:hover, .nav-cta:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(220, 38, 38, 0.45);
}

/* 按钮通用规范 (>=44x44px) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 44px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn:focus-visible {
  outline: 3px solid var(--border-focus);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(220, 38, 38, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(220, 38, 38, 0.5);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--text-accent);
  border: 1px solid var(--border-card);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--text-accent);
  color: var(--primary-hover);
}

.btn-block {
  width: 100%;
}

/* 主视觉区 (Hero Section) */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
  text-align: center;
  background: radial-gradient(circle at 50% 20%, rgba(255, 245, 245, 0.65) 0%, rgba(255, 255, 255, 0.45) 85%);
}

.hero-section::before {
  content: "";
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 760px;
  height: 420px;
  background: radial-gradient(circle, rgba(220, 38, 38, 0.09) 0%, rgba(249, 115, 22, 0.03) 50%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background-color: #fff1f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius-full);
  color: var(--text-accent);
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

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

.hero-subtitle {
  font-size: clamp(1.05rem, 2.5vw, 1.25rem);
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 16px;
  font-weight: 600;
}

.hero-intro {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 740px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.trust-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

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

.trust-icon {
  color: var(--primary);
  width: 18px;
  height: 18px;
}

/* 区块通用结构 */
.section-padding {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 50px;
}

.section-tag {
  color: var(--text-accent);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--text-main);
}

.section-desc {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.65;
}

/* 套餐价格表区块 */
.pricing-section {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-card);
  background-color: #ffffff;
  box-shadow: 0 10px 30px rgba(220, 38, 38, 0.05);
  margin-bottom: 30px;
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 680px;
}

.pricing-table caption {
  padding: 16px 20px;
  font-size: 0.9rem;
  color: var(--text-light);
  background-color: #fff1f2;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
  font-weight: 600;
}

.pricing-table th, 
.pricing-table td {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.pricing-table th {
  background-color: #faf5f5;
  font-weight: 700;
  color: var(--text-main);
  font-size: 1rem;
}

.pricing-table tbody tr {
  transition: background-color var(--transition-fast);
}

.pricing-table tbody tr:hover {
  background-color: var(--bg-card-hover);
}

.pricing-table .plan-name {
  font-weight: 700;
  color: var(--text-main);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-table .price {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-accent);
}

.pricing-table .price-unit {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.pricing-badge {
  display: inline-block;
  padding: 2px 8px;
  background-color: var(--primary);
  color: #ffffff;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
}

/* 核心优势卡片 (3卡) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: #fca5a5;
  box-shadow: 0 12px 30px rgba(220, 38, 38, 0.08);
}

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: #fff1f2;
  border: 1px solid #fecaca;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-accent);
  margin-bottom: 24px;
}

.feature-icon {
  width: 28px;
  height: 28px;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-main);
}

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

/* 流媒体与 AI 支持图卡 */
.media-ai-section {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.support-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}

.support-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.support-icon {
  width: 44px;
  height: 44px;
  color: var(--text-accent);
}

.support-card-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
}

.support-desc {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: #fff1f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius-full);
  padding: 6px 14px;
  font-size: 0.875rem;
  color: #991b1b;
  font-weight: 600;
}

/* 用户评价区 */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}

.testimonial-rating {
  color: #f59e0b;
  margin-bottom: 16px;
  display: flex;
  gap: 4px;
}

.testimonial-text {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 20px;
  font-style: normal;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 1rem;
}

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

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

/* FAQ 常见问答区 (默认全部展开) */
.faq-section {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.faq-item:hover {
  border-color: #fca5a5;
  box-shadow: 0 4px 14px rgba(220, 38, 38, 0.05);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: -2px;
}

.faq-chevron {
  width: 20px;
  height: 20px;
  color: var(--text-accent);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
  margin-left: 12px;
}

/* 默认展开时图标旋转 */
.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 26px 22px;
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.75;
}

.faq-answer a {
  color: var(--text-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

.faq-answer a:hover {
  color: var(--primary-hover);
}

/* 页脚 (规范：仅保留4个标题，在新页面展示) */
.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 48px 0 32px;
  margin-top: auto;
  text-align: center;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.footer-link {
  color: var(--text-light);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
}

.footer-link:hover, .footer-link:focus-visible {
  color: var(--text-accent);
  background-color: #fff1f2;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* ==========================================================================
   文章页与二级页面专用样式 (Knowledge Hub / Articles / Secondary)
   ========================================================================== */

.page-hero {
  padding: 60px 0 40px;
  background-color: rgba(255, 248, 248, 0.85);
  border-bottom: 1px solid var(--border-color);
  text-align: center;
}

.page-title {
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-main);
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 680px;
  margin: 0 auto;
}

.article-container {
  max-width: 820px;
  margin: 40px auto 60px;
  padding: 0 20px;
}

.article-header {
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 12px;
  flex-wrap: wrap;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-light);
}

.article-content h2 {
  font-size: 1.5rem;
  color: var(--text-main);
  margin: 36px 0 16px;
  font-weight: 700;
  border-left: 4px solid var(--primary);
  padding-left: 12px;
}

.article-content h3 {
  font-size: 1.25rem;
  color: var(--text-main);
  margin: 28px 0 12px;
  font-weight: 600;
}

.article-content p {
  margin-bottom: 18px;
}

.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content a {
  color: var(--text-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background-color: #fff8f8;
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: var(--text-muted);
  font-style: italic;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(225, 29, 72, 0.07) 0%, rgba(220, 38, 38, 0.04) 100%);
  border: 1px solid #fecaca;
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  margin: 48px 0;
}

.article-cta-box h3 {
  margin-top: 0;
  margin-bottom: 12px;
  color: var(--text-main);
}

.article-cta-box p {
  color: var(--text-light);
  margin-bottom: 20px;
}

/* 知识科普列表网格 */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.article-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--text-accent);
  box-shadow: 0 10px 24px rgba(220, 38, 38, 0.08);
}

.article-card-title {
  color: var(--text-main);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}

.article-card-excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
}

.article-card-readmore {
  color: var(--text-accent);
  font-weight: 700;
}

/* 网站地图列表卡片 */
.sitemap-list {
  background-color: #ffffff;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin: 30px auto;
  max-width: 860px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.03);
}

.sitemap-group {
  margin-bottom: 30px;
}

.sitemap-group:last-child {
  margin-bottom: 0;
}

.sitemap-group-title {
  font-size: 1.25rem;
  color: var(--text-accent);
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
  font-weight: 700;
}

.sitemap-ul {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.sitemap-ul li a {
  color: var(--text-light);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  padding: 6px 0;
  font-weight: 500;
}

.sitemap-ul li a:hover {
  color: var(--text-accent);
  text-decoration: underline;
}

/* ==========================================================================
   背景梅花飘落与国风暗纹动效 (Plum Blossom Ambient Effects)
   GPU 加速 | 纯原生 CSS 动画 | 零外部依赖 | 保证 WCAG 无障碍访问
   ========================================================================== */

.plum-blossoms-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  z-index: 1;
  perspective: 800px;
}

.plum-item {
  position: absolute;
  top: -50px;
  pointer-events: none;
  user-select: none;
  will-change: transform;
  filter: drop-shadow(0 3px 8px rgba(220, 38, 38, 0.35));
}

.plum-item.leaf {
  filter: drop-shadow(0 2px 7px rgba(21, 128, 61, 0.42));
}

/* 36 朵形态各异红梅、花瓣与翠绿梅叶 - 强密度全景飘落 (大中小景深) */
.plum-item.p1  { left: 2%;  width: 30px; animation: plumFall 11s linear infinite, plumSway 4.0s ease-in-out infinite alternate; animation-delay: 0s; }
.plum-item.p2  { left: 5%;  width: 17px; animation: plumFall 15s linear infinite, plumSway 5.2s ease-in-out infinite alternate; animation-delay: 2.8s; }
.plum-item.p3  { left: 8%;  width: 22px; animation: plumFall 13.5s linear infinite, leafSway 4.3s ease-in-out infinite alternate; animation-delay: 1.0s; }
.plum-item.p4  { left: 13%; width: 34px; animation: plumFall 10s linear infinite, plumSway 3.6s ease-in-out infinite alternate; animation-delay: 3.8s; }
.plum-item.p5  { left: 16%; width: 16px; animation: plumFall 16s linear infinite, plumSway 5.0s ease-in-out infinite alternate; animation-delay: 5.5s; }
.plum-item.p6  { left: 20%; width: 25px; animation: plumFall 12s linear infinite, leafSway 3.8s ease-in-out infinite alternate; animation-delay: 1.8s; }
.plum-item.p7  { left: 24%; width: 31px; animation: plumFall 11.5s linear infinite, plumSway 3.8s ease-in-out infinite alternate; animation-delay: 4.8s; }
.plum-item.p8  { left: 28%; width: 15px; animation: plumFall 17s linear infinite, plumSway 5.4s ease-in-out infinite alternate; animation-delay: 0.5s; }
.plum-item.p9  { left: 32%; width: 21px; animation: plumFall 14s linear infinite, leafSway 4.6s ease-in-out infinite alternate; animation-delay: 6.8s; }
.plum-item.p10 { left: 36%; width: 36px; animation: plumFall 9.5s linear infinite, plumSway 3.5s ease-in-out infinite alternate; animation-delay: 1.5s; }
.plum-item.p11 { left: 40%; width: 17px; animation: plumFall 19s linear infinite, plumSway 5.6s ease-in-out infinite alternate; animation-delay: 7.8s; }
.plum-item.p12 { left: 44%; width: 24px; animation: plumFall 12.5s linear infinite, leafSway 4.1s ease-in-out infinite alternate; animation-delay: 3.2s; }
.plum-item.p13 { left: 48%; width: 30px; animation: plumFall 11.5s linear infinite, plumSway 3.9s ease-in-out infinite alternate; animation-delay: 6.2s; }
.plum-item.p14 { left: 52%; width: 16px; animation: plumFall 16s linear infinite, plumSway 5.0s ease-in-out infinite alternate; animation-delay: 2.2s; }
.plum-item.p15 { left: 56%; width: 22px; animation: plumFall 14.5s linear infinite, leafSway 4.4s ease-in-out infinite alternate; animation-delay: 8.8s; }
.plum-item.p16 { left: 60%; width: 33px; animation: plumFall 10.5s linear infinite, plumSway 3.7s ease-in-out infinite alternate; animation-delay: 0.8s; }
.plum-item.p17 { left: 64%; width: 18px; animation: plumFall 15s linear infinite, plumSway 4.7s ease-in-out infinite alternate; animation-delay: 4.2s; }
.plum-item.p18 { left: 68%; width: 26px; animation: plumFall 13s linear infinite, leafSway 4.0s ease-in-out infinite alternate; animation-delay: 7.2s; }
.plum-item.p19 { left: 72%; width: 35px; animation: plumFall 9.8s linear infinite, plumSway 3.6s ease-in-out infinite alternate; animation-delay: 3.6s; }
.plum-item.p20 { left: 75%; width: 16px; animation: plumFall 16.5s linear infinite, plumSway 4.9s ease-in-out infinite alternate; animation-delay: 1.2s; }
.plum-item.p21 { left: 79%; width: 21px; animation: plumFall 13.5s linear infinite, leafSway 4.3s ease-in-out infinite alternate; animation-delay: 5.6s; }
.plum-item.p22 { left: 83%; width: 30px; animation: plumFall 11s linear infinite, plumSway 3.8s ease-in-out infinite alternate; animation-delay: 8.0s; }
.plum-item.p23 { left: 87%; width: 17px; animation: plumFall 17s linear infinite, plumSway 5.3s ease-in-out infinite alternate; animation-delay: 2.0s; }
.plum-item.p24 { left: 91%; width: 24px; animation: plumFall 12s linear infinite, leafSway 4.2s ease-in-out infinite alternate; animation-delay: 6.0s; }
.plum-item.p25 { left: 95%; width: 34px; animation: plumFall 10s linear infinite, plumSway 3.5s ease-in-out infinite alternate; animation-delay: 4.2s; }
.plum-item.p26 { left: 4%;  width: 20px; animation: plumFall 14.5s linear infinite, leafSway 4.5s ease-in-out infinite alternate; animation-delay: 9.8s; }
.plum-item.p27 { left: 11%; width: 15px; animation: plumFall 18.5s linear infinite, plumSway 5.5s ease-in-out infinite alternate; animation-delay: 11.2s; }
.plum-item.p28 { left: 18%; width: 23px; animation: plumFall 13s linear infinite, leafSway 3.9s ease-in-out infinite alternate; animation-delay: 9.0s; }
.plum-item.p29 { left: 26%; width: 18px; animation: plumFall 15s linear infinite, plumSway 4.8s ease-in-out infinite alternate; animation-delay: 10.5s; }
.plum-item.p30 { left: 38%; width: 22px; animation: plumFall 12.8s linear infinite, leafSway 4.2s ease-in-out infinite alternate; animation-delay: 10.8s; }
.plum-item.p31 { left: 50%; width: 16px; animation: plumFall 17s linear infinite, plumSway 5.0s ease-in-out infinite alternate; animation-delay: 11.8s; }
.plum-item.p32 { left: 63%; width: 25px; animation: plumFall 13.5s linear infinite, leafSway 4.1s ease-in-out infinite alternate; animation-delay: 10.0s; }
.plum-item.p33 { left: 70%; width: 29px; animation: plumFall 10.8s linear infinite, plumSway 3.7s ease-in-out infinite alternate; animation-delay: 8.5s; }
.plum-item.p34 { left: 77%; width: 18px; animation: plumFall 15.5s linear infinite, plumSway 4.9s ease-in-out infinite alternate; animation-delay: 11.0s; }
.plum-item.p35 { left: 85%; width: 22px; animation: plumFall 13.8s linear infinite, leafSway 4.3s ease-in-out infinite alternate; animation-delay: 9.5s; }
.plum-item.p36 { left: 97%; width: 15px; animation: plumFall 16s linear infinite, plumSway 5.1s ease-in-out infinite alternate; animation-delay: 12.0s; }

@keyframes plumFall {
  0% {
    top: -55px;
    opacity: 0;
  }
  6% {
    opacity: 0.96;
  }
  94% {
    opacity: 0.96;
  }
  100% {
    top: 105vh;
    opacity: 0;
  }
}

@keyframes plumSway {
  0% {
    transform: translateX(-30px) rotate(0deg) scale(0.9);
  }
  50% {
    transform: translateX(30px) rotate(180deg) scale(1.15);
  }
  100% {
    transform: translateX(-20px) rotate(360deg) scale(0.95);
  }
}

@keyframes leafSway {
  0% {
    transform: translateX(-35px) rotateZ(-30deg) rotateY(0deg) scale(0.9);
  }
  30% {
    transform: translateX(12px) rotateZ(15deg) rotateY(70deg) scale(1.05);
  }
  70% {
    transform: translateX(35px) rotateZ(45deg) rotateY(180deg) scale(1.15);
  }
  100% {
    transform: translateX(-20px) rotateZ(-20deg) rotateY(360deg) scale(0.95);
  }
}

/* 确保所有主内容区层级在花瓣之上，保证无障碍点击与选中文本 */
.hero-content,
.section-header,
.table-responsive,
.feature-card,
.support-card,
.testimonial-card,
.faq-list,
.article-container,
.sitemap-list,
.site-footer {
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   响应式媒体查询 (Mobile Responsive @media)
   适配 1024px, 768px, 480px, 360px
   ========================================================================== */

@media (max-width: 1024px) {
  .features-grid,
  .testimonials-grid,
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  
  body {
    background-size: 1100px auto;
    background-position: top -10px left -50px;
  }
  
  .header-inner {
    flex-wrap: wrap;
    padding: 10px 0;
  }
  
  .site-nav {
    display: flex;
    overflow-x: auto;
    width: 100%;
    order: 3;
    padding: 8px 0 4px;
    gap: 16px;
    -webkit-overflow-scrolling: touch;
  }
  
  .site-header {
    height: auto;
  }
  
  .features-grid,
  .media-ai-grid,
  .testimonials-grid,
  .articles-grid,
  .sitemap-ul {
    grid-template-columns: 1fr;
  }
  
  .hero-section {
    padding: 48px 0 40px;
  }
  
  .section-padding {
    padding: 50px 0;
  }
  
  .trust-badges {
    gap: 16px;
  }
  
  .footer-nav {
    gap: 18px;
  }
  
  .faq-question {
    padding: 18px 20px;
    font-size: 1rem;
  }
  
  .faq-answer {
    padding: 0 20px 18px;
  }
}

@media (max-width: 480px) {
  .btn {
    width: 100%;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-title {
    font-size: 1.85rem;
  }
}

/* 动效降低首选项 */
@media (prefers-reduced-motion: reduce) {
  .plum-blossoms-bg {
    display: none !important;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}