/* ==========================================================================
   kendeji 肯德基机场官方落地页 (kendejichang.mom) - 极速核心原生样式表
   零重型库依赖 | 纯原生 CSS | 极致秒开体验 | 动态星云与科技流光美学
   ========================================================================== */

/* --- 1. 设计系统与 CSS 变量 --- */
:root {
  --bg-deep: #080C16;
  --bg-surface: #0E1626;
  --bg-card: rgba(16, 24, 40, 0.75);
  --bg-card-hover: rgba(23, 34, 56, 0.9);
  --bg-nav: rgba(8, 12, 22, 0.88);

  /* 肯德基机场品牌专属色彩：烈焰赤红、日光暖橙、曜金、霓虹青 */
  --primary: #FF3366;
  --primary-hover: #E11D48;
  --orange: #FF6B35;
  --gold: #FFA800;
  --cyan: #00F2FE;
  --glow-primary: rgba(255, 51, 102, 0.35);
  --glow-orange: rgba(255, 107, 53, 0.32);

  --text-main: #F8FAFC;
  --text-sub: #CBD5E1;
  --text-muted: #94A3B8;
  --text-highlight: #FF7A00;

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-card: rgba(255, 255, 255, 0.12);
  --border-brand: rgba(255, 107, 53, 0.4);
  --border-cyan: rgba(0, 242, 254, 0.4);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-card: 0 12px 36px -8px rgba(0, 0, 0, 0.55);
  --shadow-hover: 0 20px 48px -10px rgba(255, 107, 53, 0.22);
  --shadow-btn: 0 8px 24px -4px rgba(255, 51, 102, 0.4);

  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1240px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  font-family: var(--font-family);
  background-color: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: transparent;
}

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

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

ul, ol {
  list-style: none;
}

/* --- 3. 动态画布与氛围光晕 --- */
#dynamic-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  pointer-events: none;
}

.ambient-nebula {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 15% 20%, rgba(255, 51, 102, 0.12) 0%, transparent 42%),
    radial-gradient(circle at 85% 30%, rgba(255, 168, 0, 0.1) 0%, transparent 48%),
    radial-gradient(circle at 50% 80%, rgba(0, 242, 254, 0.08) 0%, transparent 55%);
  animation: nebulaBreathe 16s ease-in-out infinite alternate;
}

@keyframes nebulaBreathe {
  0% { transform: scale(1) translate(0, 0); opacity: 0.85; }
  50% { transform: scale(1.05) translate(-10px, 15px); opacity: 1; }
  100% { transform: scale(1) translate(10px, -15px); opacity: 0.85; }
}

/* --- 4. 容器与通用排版 --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
  position: relative;
  z-index: 2;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255, 107, 53, 0.12);
  border: 1px solid rgba(255, 107, 53, 0.35);
  border-radius: var(--radius-full);
  color: var(--orange);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.gradient-text {
  background: linear-gradient(135deg, #FF3366 0%, #FF7A00 50%, #FFA800 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-text-cyan {
  background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

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

/* --- 5. 按钮规范 --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #FF3366 0%, #FF6B35 100%);
  color: #FFFFFF;
  box-shadow: var(--shadow-btn);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(255, 51, 102, 0.5);
  background: linear-gradient(135deg, #FF1E56 0%, #FF5A1F 100%);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid var(--border-card);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--text-main);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--orange);
  border: 1.5px solid rgba(255, 107, 53, 0.6);
}

.btn-outline:hover {
  background: rgba(255, 107, 53, 0.15);
  border-color: var(--orange);
  color: #FFF;
  transform: translateY(-2px);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

/* --- 6. 顶部导航栏 (Header) --- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: 76px;
  background: var(--bg-nav);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  transition: all var(--transition);
}

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

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-logo img {
  height: 48px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-sub);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: #FFFFFF;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #FF3366, #FFA800);
  transition: width var(--transition);
  border-radius: 2px;
}

.nav-link:hover::after {
  width: 100%;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.6rem;
  cursor: pointer;
  padding: 6px;
}

/* --- 7. Hero 主屏展区 --- */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(255, 51, 102, 0.12);
  border: 1px solid rgba(255, 51, 102, 0.35);
  border-radius: var(--radius-full);
  color: #FFA5BA;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #FF3366;
  box-shadow: 0 0 10px #FF3366;
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -1px;
  margin-bottom: 22px;
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-sub);
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 45px;
  flex-wrap: wrap;
}

.hero-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  color: var(--text-muted);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.hero-guarantee span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 核心指标统计带 */
.hero-stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 50px;
  background: rgba(14, 22, 38, 0.7);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.stat-item {
  text-align: center;
  border-right: 1px solid var(--border-subtle);
}

.stat-item:last-child {
  border-right: none;
}

.stat-num {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 4px;
}

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

/* --- 8. 核心优势卡片网格 --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition);
  position: relative;
  backdrop-filter: blur(12px);
  overflow: hidden;
}

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

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: rgba(255, 107, 53, 0.12);
  border: 1px solid rgba(255, 107, 53, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 22px;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #FFFFFF;
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.65;
}

/* ==========================================================================
   9. 套餐价格专区 - 严格同排规则 (所有价格要同排)
   在桌面端 (>= 992px) 严格采用 4 列单排布局 (repeat(4, 1fr))
   ========================================================================== */
.pricing-section {
  padding: 90px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  backdrop-filter: blur(12px);
  transition: all var(--transition);
}

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

.pricing-card.popular {
  background: linear-gradient(180deg, rgba(255, 51, 102, 0.1) 0%, rgba(14, 22, 38, 0.85) 100%);
  border: 2px solid #FF4D79;
  box-shadow: 0 16px 40px -10px rgba(255, 51, 102, 0.3);
  position: relative;
}

.pricing-card.popular::before {
  content: '★ 强烈推荐 / 爆款王';
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #FF3366, #FF7A00);
  color: #FFF;
  font-size: 0.76rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(255, 51, 102, 0.4);
  white-space: nowrap;
}

.plan-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-sub);
  margin-bottom: 12px;
}

.pricing-card.popular .plan-badge {
  background: rgba(255, 51, 102, 0.2);
  color: #FFA5BA;
}

.plan-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  min-height: 42px;
  line-height: 1.5;
  margin-bottom: 20px;
}

.plan-price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
}

.price {
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1;
  color: #FFFFFF;
  letter-spacing: -1px;
}

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

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.45;
}

.plan-feature-item strong {
  color: #FFFFFF;
}

.check-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(34, 197, 94, 0.15);
  color: #22C55E;
  font-size: 0.75rem;
  font-weight: 900;
  flex-shrink: 0;
  margin-top: 2px;
}

.plan-cta-box {
  margin-top: auto;
}

/* --- 10. 实时测速与节点表现表格 --- */
.table-wrapper {
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.speed-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.speed-table th {
  background: rgba(255, 255, 255, 0.04);
  padding: 16px 20px;
  color: var(--text-muted);
  font-weight: 700;
  border-bottom: 1px solid var(--border-card);
  white-space: nowrap;
}

.speed-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-sub);
  white-space: nowrap;
}

.speed-table tr:last-child td {
  border-bottom: none;
}

.speed-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.latency-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  background: rgba(34, 197, 94, 0.15);
  color: #22C55E;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.status-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #22C55E;
  font-size: 0.88rem;
  font-weight: 600;
}

.status-live::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22C55E;
  box-shadow: 0 0 8px #22C55E;
}

/* --- 11. 教程与精选文章 (内部链接与SEO矩阵) --- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  position: relative;
  backdrop-filter: blur(12px);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-brand);
  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-cat {
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(255, 107, 53, 0.15);
  color: var(--orange);
  font-weight: 600;
}

.article-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: #FFFFFF;
}

.article-card-title a:hover {
  color: var(--orange);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
}

.read-more-link {
  color: var(--orange);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.read-more-link:hover {
  color: #FFA800;
  transform: translateX(3px);
}

/* --- 12. 用户评价 (Testimonials) --- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(12px);
  transition: all var(--transition);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.2);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #FF3366, #FF7A00);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #FFF;
  flex-shrink: 0;
}

.user-info h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #FFFFFF;
}

.user-role {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.review-stars {
  color: #F59E0B;
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.65;
}

/* --- 13. 常见问题 FAQ (手风琴) --- */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item.active {
  border-color: var(--border-brand);
  background: var(--bg-card-hover);
}

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

.faq-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  transition: transform var(--transition);
  color: var(--orange);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 24px;
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 380px;
  padding-bottom: 22px;
}

/* --- 14. 权威外链与友链专区 --- */
.links-section {
  padding: 40px 0;
  border-top: 1px solid var(--border-subtle);
  background: rgba(8, 12, 22, 0.4);
}

.links-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 20px;
  align-items: center;
  justify-content: center;
}

.external-link-item {
  font-size: 0.88rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
}

.external-link-item:hover {
  color: #FFF;
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
}

/* --- 15. 页脚 Footer --- */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: #060910;
  padding: 60px 0 30px;
  position: relative;
  z-index: 10;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
  margin-top: 16px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 20px;
}

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

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--orange);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 25px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 14px;
}

.disclaimer-text {
  font-size: 0.8rem;
  color: #64748B;
  margin-top: 10px;
  line-height: 1.5;
  width: 100%;
}

/* --- 16. 响应式适配 --- */
@media (max-width: 1120px) {
  .hero-title {
    font-size: 2.8rem;
  }
  .pricing-grid {
    gap: 14px;
  }
  .pricing-card {
    padding: 24px 18px;
  }
  .price {
    font-size: 2.3rem;
  }
}

@media (max-width: 991px) {
  .site-header {
    height: 68px;
  }
  .mobile-menu-btn {
    display: block;
  }
  .nav-menu {
    position: fixed;
    top: 68px;
    left: 0;
    width: 100%;
    background: #0B101E;
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-card);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
  }
  .nav-menu.is-active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .hero-stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .stat-item:nth-child(2) {
    border-right: none;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  /* 在平板端允许横向滚动或 2x2 网格，保持紧凑 */
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .articles-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 50px 0;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .hero-stats-bar {
    grid-template-columns: 1fr;
  }
  .stat-item {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 14px;
  }
  .stat-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .articles-grid, .reviews-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
}


/* ===================================================================
   各种各样动态【肯の机】炸鸡腿漂浮背景 (原味鸡腿/香辣鸡腿/火箭鸡腿/赛博鸡腿/芝士鸡腿/墨镜鸡腿)
   纯 CSS3 硬件加速 | 零外部 JS 依赖 | 秒开流畅 60FPS
   =================================================================== */
.dynamic-bg-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.aurora-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
  will-change: transform;
}

.orb-1 {
  top: -10%;
  left: 15%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #ff1744 0%, rgba(255, 82, 82, 0) 70%);
  animation: floatOrb1 18s ease-in-out infinite alternate;
}

.orb-2 {
  top: 30%;
  right: -5%;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, #ff9100 0%, rgba(255, 145, 0, 0) 70%);
  animation: floatOrb2 22s ease-in-out infinite alternate;
}

.orb-3 {
  bottom: -10%;
  left: 20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #00e5ff 0%, rgba(0, 229, 255, 0) 70%);
  animation: floatOrb3 20s ease-in-out infinite alternate;
}

.cyber-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 60%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 60%, transparent 100%);
}

@keyframes floatOrb1 {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(80px, 60px, 0) scale(1.15); }
  100% { transform: translate3d(-40px, 90px, 0) scale(0.95); }
}

@keyframes floatOrb2 {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-100px, -70px, 0) scale(1.1); }
  100% { transform: translate3d(40px, -40px, 0) scale(0.9); }
}

@keyframes floatOrb3 {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(90px, -80px, 0) scale(1.12); }
  100% { transform: translate3d(-70px, 30px, 0) scale(0.92); }
}

.chicken-leg-item {
  position: absolute;
  pointer-events: none;
  user-select: none;
  will-change: transform;
  filter: drop-shadow(0 8px 18px rgba(0, 0, 0, 0.65)) drop-shadow(0 0 12px rgba(255, 235, 59, 0.28));
  transition: opacity 0.3s ease;
}

.float-track-1 { animation: floatDrumstick1 16s ease-in-out infinite alternate; }
.float-track-2 { animation: floatDrumstick2 20s ease-in-out infinite alternate; }
.float-track-3 { animation: floatDrumstick3 24s ease-in-out infinite alternate; }
.float-track-4 { animation: floatDrumstick4 18s ease-in-out infinite alternate; }
.float-track-5 { animation: floatDrumstick5 22s ease-in-out infinite alternate; }
.float-track-6 { animation: floatDrumstick6 26s ease-in-out infinite alternate; }

@keyframes floatDrumstick1 {
  0% { transform: translate3d(0, 0, 0) rotate(6deg) scale(1); }
  50% { transform: translate3d(28px, -40px, 0) rotate(-10deg) scale(1.06); }
  100% { transform: translate3d(-22px, -80px, 0) rotate(14deg) scale(0.96); }
}

@keyframes floatDrumstick2 {
  0% { transform: translate3d(0, 0, 0) rotate(-12deg) scale(0.96); }
  50% { transform: translate3d(-32px, -50px, 0) rotate(10deg) scale(1.08); }
  100% { transform: translate3d(18px, -90px, 0) rotate(-6deg) scale(1); }
}

@keyframes floatDrumstick3 {
  0% { transform: translate3d(0, 0, 0) rotate(15deg) scale(1); }
  50% { transform: translate3d(35px, -35px, 0) rotate(-5deg) scale(1.05); }
  100% { transform: translate3d(-15px, -70px, 0) rotate(20deg) scale(0.95); }
}

@keyframes floatDrumstick4 {
  0% { transform: translate3d(0, 0, 0) rotate(-8deg) scale(1.04); }
  50% { transform: translate3d(-25px, 40px, 0) rotate(14deg) scale(0.96); }
  100% { transform: translate3d(28px, 80px, 0) rotate(-16deg) scale(1.05); }
}

@keyframes floatDrumstick5 {
  0% { transform: translate3d(0, 0, 0) rotate(5deg) scale(0.94); }
  50% { transform: translate3d(32px, -55px, 0) rotate(-16deg) scale(1.1); }
  100% { transform: translate3d(-28px, -95px, 0) rotate(10deg) scale(0.96); }
}

@keyframes floatDrumstick6 {
  0% { transform: translate3d(0, 0, 0) rotate(-20deg) scale(1); }
  50% { transform: translate3d(-20px, 45px, 0) rotate(6deg) scale(1.06); }
  100% { transform: translate3d(22px, 85px, 0) rotate(-10deg) scale(0.94); }
}