/* ==========================================================================
   大哥云机场 - 品牌落地页系统 (V6 文章排版与独立页面修复版)
   ========================================================================== */

:root {
  --bg-main: #f0f7f5;
  --bg-card: #ffffff;
  --bg-subtle: #e6f2ef;
  --bg-accent-soft: #d8ece7;
  --bg-mint-light: #ccedd7;
  
  --primary: #3d8f7f;
  --primary-hover: #29685b;
  --primary-light: #64b5a4;
  --secondary: #e29b38;
  --accent-blue: #4a8ca0;
  
  --text-main: #222b38;
  --text-muted: #52637a;
  --text-light: #8494a8;
  
  --pixel-border-color: #222b38;
  --pixel-shadow-color: #3d8f7f;
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --font-body: "Nunito", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", sans-serif;
  --font-pixel: "Silkscreen", "VT323", "Press Start 2P", monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.8;
  overflow-x: hidden;
  position: relative;
}

/* CRT 扫描线 (极淡柔和) */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.02) 50%),
              linear-gradient(90deg, rgba(255, 0, 0, 0.006), rgba(0, 255, 0, 0.006), rgba(0, 0, 255, 0.006));
  background-size: 100% 4px, 6px 100%;
  pointer-events: none;
  z-index: 9999;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

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

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 像素台阶边框 (参照图2纯净优雅排版) */
.pixel-box {
  background: var(--bg-card);
  border: 2px solid var(--pixel-border-color);
  box-shadow: 4px 4px 0px var(--pixel-shadow-color);
  border-radius: var(--radius-md);
  transition: var(--transition-smooth);
}

.pixel-box:hover {
  transform: translateY(-3px);
  box-shadow: 6px 6px 0px var(--primary-hover);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background-color: var(--bg-accent-soft);
  color: var(--primary-hover);
  font-family: var(--font-pixel);
  font-size: 0.85rem;
  font-weight: 700;
  border: 2px solid var(--pixel-border-color);
  box-shadow: 3px 3px 0px var(--pixel-shadow-color);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 40px auto;
}

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

/* 按钮 */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  font-size: 1.02rem;
  font-weight: 700;
  font-family: var(--font-body);
  border: 2.5px solid var(--pixel-border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  overflow: hidden;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 4px 4px 0px var(--pixel-border-color);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  color: #ffffff;
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--pixel-border-color);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-main);
  box-shadow: 4px 4px 0px var(--pixel-border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-subtle);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--pixel-border-color);
}

/* 导航栏 Navbar (高层级吸顶) */
.navbar {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(240, 247, 245, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 2.5px solid var(--pixel-border-color);
  z-index: 1000;
  padding: 14px 0;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-pixel);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--bg-accent-soft);
  border: 2px solid var(--pixel-border-color);
  box-shadow: 3px 3px 0px var(--pixel-shadow-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition-smooth);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-hover);
  background: var(--bg-accent-soft);
  border: 2px solid var(--pixel-border-color);
}

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

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

/* Hero 视觉区 */
.hero {
  padding: 60px 0 50px 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
  align-items: center;
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-title span {
  color: var(--primary);
  background: var(--bg-accent-soft);
  padding: 0 8px;
  border: 2px solid var(--pixel-border-color);
  box-shadow: 3px 3px 0px var(--pixel-shadow-color);
  border-radius: var(--radius-sm);
}

.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 40px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  padding-top: 24px;
  border-top: 2px dashed var(--pixel-border-color);
}

.metric-item {
  text-align: left;
}

.metric-value-box {
  display: flex;
  align-items: baseline;
  gap: 2px;
}

.metric-number {
  font-family: var(--font-body);
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--primary-hover);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.metric-unit {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-hover);
}

.metric-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 700;
}

.coin-sparkle {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--secondary);
  border: 1px solid var(--pixel-border-color);
  animation: coinBlink 1s steps(2, start) infinite;
  margin-right: 4px;
}

@keyframes coinBlink {
  to { visibility: hidden; }
}

.illustration-card {
  padding: 32px 24px;
  text-align: center;
  position: relative;
}

.svg-hero-art {
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
}

#pixel-paper-plane {
  animation: pixelPlaneFly 3s ease-in-out infinite alternate;
}

@keyframes pixelPlaneFly {
  0% { transform: translate(0, 0); }
  100% { transform: translate(12px, -16px); }
}

/* 核心优势卡片 */
.features {
  padding: 80px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

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

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  background: var(--bg-accent-soft);
  border: 2px solid var(--pixel-border-color);
  box-shadow: 3px 3px 0px var(--pixel-shadow-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 套餐价格 */
.pricing {
  padding: 80px 0;
  background: var(--bg-subtle);
  border-top: 2.5px solid var(--pixel-border-color);
  border-bottom: 2.5px solid var(--pixel-border-color);
}

.pricing-switcher {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
}

.switch-pill {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  padding: 4px;
  border: 2.5px solid var(--pixel-border-color);
  box-shadow: 4px 4px 0px var(--pixel-shadow-color);
  border-radius: var(--radius-sm);
}

.switch-btn {
  padding: 8px 24px;
  font-size: 0.95rem;
  font-weight: 700;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.switch-btn.active {
  background: var(--primary);
  color: #ffffff;
  border: 2px solid var(--pixel-border-color);
  border-radius: var(--radius-sm);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--primary-hover);
  box-shadow: 7px 7px 0px var(--primary-hover);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  right: 20px;
  background: var(--secondary);
  color: #ffffff;
  font-family: var(--font-pixel);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border: 2px solid var(--pixel-border-color);
  border-radius: var(--radius-sm);
}

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

.plan-price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 16px 0 24px 0;
}

.price-currency {
  font-family: var(--font-body);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary-hover);
}

.price-amount {
  font-family: var(--font-body);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.price-period {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-left: 4px;
}

.plan-specs-list {
  list-style: none;
  margin-bottom: 32px;
  flex: 1;
}

.plan-specs-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  font-size: 0.98rem;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px dashed var(--pixel-border-color);
}

/* 目标人群 */
.audience {
  padding: 80px 0;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.audience-card {
  padding: 28px 24px;
  text-align: center;
}

.audience-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px auto;
  background: var(--bg-accent-soft);
  border: 2px solid var(--pixel-border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

/* 评价轮播 */
.testimonials {
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}

.testimonials-carousel-container {
  position: relative;
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 20px 0 40px 0;
}

.carousel-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.testimonial-card-item {
  flex: 0 0 520px;
  max-width: 520px;
  padding: 36px 32px;
  box-sizing: border-box;
  overflow: hidden;
  transition: all 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
  filter: blur(4px);
  opacity: 0.45;
  transform: scale(0.88);
  pointer-events: none;
}

.testimonial-card-item.active-card {
  filter: blur(0px);
  opacity: 1;
  transform: scale(1.04);
  box-shadow: 6px 6px 0px var(--pixel-shadow-color);
  z-index: 5;
  pointer-events: auto;
}

.quote-icon {
  font-family: var(--font-pixel);
  font-size: 2rem;
  color: var(--primary-light);
  line-height: 1;
  margin-bottom: 12px;
}

.testimonial-text {
  font-size: 1.05rem;
  color: var(--text-main);
  line-height: 1.8;
  margin-bottom: 24px;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  background: var(--bg-accent-soft);
  border: 2px solid var(--pixel-border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.author-info h5 {
  font-size: 1rem;
  font-weight: 800;
}

.author-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.carousel-nav-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 28px;
}

.carousel-arrow-btn {
  width: 42px;
  height: 42px;
  background: var(--bg-card);
  border: 2.5px solid var(--pixel-border-color);
  box-shadow: 3px 3px 0px var(--pixel-border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font-pixel);
  font-size: 1.2rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.carousel-arrow-btn:hover {
  background: var(--primary);
  color: #ffffff;
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px var(--pixel-border-color);
}

.carousel-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}

.dot {
  width: 10px;
  height: 10px;
  background: var(--text-light);
  border: 1px solid var(--pixel-border-color);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.dot.active {
  background: var(--primary);
  width: 24px;
}

/* 全局锚点吸顶导航防遮挡 */
section[id] {
  scroll-margin-top: 90px;
}

/* 核心需求 2：文章模块纯净极简排版（参考图2设计） */
.articles-section {
  padding: 80px 0 90px 0;
  scroll-margin-top: 90px;
}

.article-filter-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
  margin-bottom: 36px;
}

.filter-tab-btn {
  padding: 8px 20px;
  font-size: 0.9rem;
  font-weight: 700;
  background: var(--bg-card);
  border: 2px solid var(--pixel-border-color);
  box-shadow: 3px 3px 0px var(--pixel-border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.filter-tab-btn:hover,
.filter-tab-btn.active {
  background: var(--primary);
  color: #ffffff;
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px var(--pixel-border-color);
}

/* 2列纯净大卡片布局（完全匹配参考图2规范） */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

@media (max-width: 768px) {
  .articles-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* 参考图2：高质感纯白圆角卡片，标题突出“大哥云机场”，副标题优雅两行说明 */
.article-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-decoration: none;
  color: inherit;
  background: #ffffff;
  border: 2px solid var(--pixel-border-color);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  box-shadow: 4px 4px 0px var(--pixel-shadow-color);
  transition: var(--transition-smooth);
  min-height: 124px;
  box-sizing: border-box;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: 6px 6px 0px var(--primary-hover);
  border-color: var(--pixel-border-color);
}

.article-title {
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
  transition: color 0.25s ease;
}

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

.article-excerpt {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

/* ==========================================================================
   核心需求 1：文章独立页面排版修护 (解决 1280px 拉伸、内边距缺失、重叠遮挡与字距过密)
   ========================================================================== */
.article-page-main {
  padding-top: 120px;
  padding-bottom: 100px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

/* 集中式黄金阅读列 width 880px + 充沛内边距 */
.article-container {
  max-width: 880px;
  width: 100%;
  padding: 48px 56px;
  background: #ffffff;
  border: 2px solid var(--pixel-border-color);
  box-shadow: 6px 6px 0px var(--pixel-shadow-color);
  border-radius: var(--radius-lg);
  margin: 0 auto;
}

@media (max-width: 768px) {
  .article-page-main {
    padding-top: 100px;
    padding-bottom: 60px;
  }
  .article-container {
    padding: 24px 20px;
    box-shadow: 4px 4px 0px var(--pixel-shadow-color);
  }
}

.article-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 12px;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 2px dashed rgba(61, 143, 127, 0.25);
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-content-render {
  font-family: var(--font-body) !important;
  font-size: 1.08rem;
  color: #2c3e50;
  line-height: 1.9;
}

.article-content-render h1 {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.article-content-render h2 {
  font-size: 1.48rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 40px 0 20px 0;
  border-left: 5px solid var(--primary);
  padding-left: 16px;
  line-height: 1.4;
}

.article-content-render p {
  font-family: var(--font-body) !important;
  font-size: 1.06rem;
  color: #334155;
  margin-bottom: 24px;
  line-height: 1.9;
  letter-spacing: 0.01em;
}

.article-callout {
  background: var(--bg-accent-soft);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
  margin: 28px 0;
  font-size: 1.02rem;
  color: var(--text-main);
  line-height: 1.75;
}

.article-content-render table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 36px 0;
  border: 2px solid var(--pixel-border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 3px 3px 0px rgba(0, 0, 0, 0.05);
}

.article-content-render th,
.article-content-render td {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(61, 143, 127, 0.15);
  border-right: 1px solid rgba(61, 143, 127, 0.15);
  text-align: left;
  line-height: 1.6;
}

.article-content-render tr:last-child td {
  border-bottom: none;
}

.article-content-render th:last-child,
.article-content-render td:last-child {
  border-right: none;
}

.article-content-render th {
  background: var(--bg-accent-soft);
  font-weight: 800;
  color: var(--text-main);
  font-size: 0.98rem;
}

.article-faq-box {
  background: var(--bg-subtle);
  border: 2px solid var(--pixel-border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-top: 48px;
}

.article-faq-box h3 {
  margin-top: 0;
  margin-bottom: 20px;
}

/* 文章末尾 CTA 强引导卡片 (解决按钮贴合重叠问题) */
.article-cta-box {
  background: linear-gradient(135deg, #e6f2ef 0%, #ffffff 100%);
  border: 2px solid var(--pixel-border-color);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  margin-top: 52px;
  margin-bottom: 44px;
  text-align: center;
  box-shadow: 5px 5px 0px var(--pixel-shadow-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  width: 100%;
  box-sizing: border-box;
}

.article-cta-box h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 0;
}

.article-cta-box p {
  font-size: 1.02rem;
  color: var(--text-muted);
  margin: 0 0 6px 0;
}

.article-cta-box .btn {
  margin-top: 6px;
  padding: 14px 36px;
  font-size: 1.05rem;
  font-weight: 800;
}

/* 底部分页与上下篇导栏 (彻底解决按钮重叠遮挡) */
.article-bottom-nav {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 2px dashed rgba(61, 143, 127, 0.3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  width: 100%;
  clear: both;
  box-sizing: border-box;
}

.article-bottom-nav .btn {
  padding: 12px 24px;
  font-size: 0.96rem;
  font-weight: 700;
  white-space: nowrap;
  max-width: 100%;
  box-shadow: 4px 4px 0px var(--pixel-border-color);
  margin: 4px 0;
}

@media (max-width: 640px) {
  .article-bottom-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .article-bottom-nav .btn {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
}

/* FAQ */
.faq-section {
  padding: 80px 0;
  background: var(--bg-card);
  border-top: 2.5px solid var(--pixel-border-color);
}

.faq-accordion {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 2px dashed var(--pixel-border-color);
  padding: 20px 0;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
  cursor: pointer;
  gap: 16px;
}

.faq-icon {
  font-family: var(--font-pixel);
  font-size: 1.2rem;
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding-top: 14px;
}

/* 页脚 */
.footer {
  background: #e2edea;
  border-top: 2.5px solid var(--pixel-border-color);
  padding: 70px 0 40px 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand h4 {
  font-family: var(--font-pixel);
  font-size: 1.3rem;
  color: var(--text-main);
  margin-bottom: 16px;
}

.footer-col h5 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-bottom {
  border-top: 2px dashed var(--pixel-border-color);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

/* Legal Modals */
.legal-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(34, 43, 56, 0.6);
  backdrop-filter: blur(4px);
  z-index: 2000;
  overflow-y: auto;
  padding: 40px 20px;
}

.legal-modal.active {
  display: block;
}

.legal-box {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  padding: 48px;
  position: relative;
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  background: var(--bg-accent-soft);
  border: 2px solid var(--pixel-border-color);
  font-family: var(--font-pixel);
  font-size: 1.1rem;
  cursor: pointer;
}

@media (max-width: 992px) {
  .articles-grid { grid-template-columns: 1fr; }
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-cta, .hero-metrics { justify-content: center; }
  .testimonial-card-item { flex: 0 0 85%; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-card);
    flex-direction: column;
    padding: 20px;
    border-bottom: 2.5px solid var(--pixel-border-color);
  }
  .nav-links.active { display: flex; }
  .mobile-menu-toggle { display: block; }
  .hero-title { font-size: 2.1rem; }
  .testimonial-card-item { flex: 0 0 92%; padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
}