/* ==========================================================================
   一元机场 (yiyuanjc.click) - 全局原生样式表
   极简无依赖、极致性能秒开、暗夜深空蓝 + 电光蓝科技风
   ========================================================================== */

:root {
  --bg-primary: #050816;
  --bg-secondary: #0b112c;
  --bg-card: rgba(13, 21, 50, 0.7);
  --bg-card-hover: rgba(18, 30, 72, 0.85);
  --border-color: rgba(0, 212, 255, 0.18);
  --border-focus: #00d4ff;
  --accent-blue: #00d4ff;
  --accent-glow: rgba(0, 212, 255, 0.35);
  --accent-glow-strong: rgba(0, 212, 255, 0.65);
  --text-main: #f0f6fc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --nav-bg: rgba(5, 8, 22, 0.88);
  --success: #10b981;
  --badge-bg: rgba(0, 212, 255, 0.12);
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --container-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.68;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

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

ul, ol {
  list-style: none;
}

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

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

/* 全屏粒子画布背景 */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* 导航栏 */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-size: 1.42rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.25), rgba(0, 212, 255, 0.05));
  border: 1px solid var(--border-focus);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  box-shadow: 0 0 15px var(--accent-glow);
}

.logo-text span {
  color: var(--accent-blue);
  text-shadow: 0 0 12px var(--accent-glow);
}

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

.nav-link {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-blue);
  text-shadow: 0 0 8px var(--accent-glow);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-blue);
  transition: width 0.25s ease;
  box-shadow: 0 0 8px var(--accent-blue);
}

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

.nav-badge-hot {
  font-size: 0.72rem;
  background: rgba(0, 212, 255, 0.18);
  color: var(--accent-blue);
  border: 1px solid var(--accent-blue);
  padding: 2px 7px;
  border-radius: 12px;
  margin-left: 5px;
  font-weight: 600;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background: linear-gradient(135deg, #00d4ff, #0099cc);
  color: #050816;
  border: 1px solid #00d4ff;
  font-weight: 700;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #33dcff, #00d4ff);
  box-shadow: 0 6px 28px var(--accent-glow-strong);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(11, 17, 44, 0.8);
  color: var(--accent-blue);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  border-color: var(--accent-blue);
  background: rgba(0, 212, 255, 0.1);
  box-shadow: 0 4px 18px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
  border-radius: 10px;
}

/* 磁性按钮容器 */
.magnetic-wrap {
  display: inline-block;
  position: relative;
}

/* 移动端菜单按钮 */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
}

.mobile-toggle svg {
  width: 26px;
  height: 26px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

/* 主内容容器 */
.main-wrapper {
  position: relative;
  z-index: 1;
}

/* Hero 英雄区 */
.hero-section {
  padding: 90px 0 70px;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--badge-bg);
  border: 1px solid var(--border-color);
  padding: 6px 18px;
  border-radius: 30px;
  color: var(--accent-blue);
  font-size: 0.88rem;
  margin-bottom: 24px;
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.15);
}

.hero-pill-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-blue);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-blue);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -1px;
  margin-bottom: 20px;
  color: var(--text-main);
}

.hero-title .glow-text {
  color: var(--accent-blue);
  text-shadow: 0 0 25px var(--accent-glow-strong);
  display: inline-block;
}

.typing-cursor {
  display: inline-block;
  width: 3px;
  background-color: var(--accent-blue);
  margin-left: 4px;
  animation: blink 0.9s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-desc {
  max-width: 780px;
  margin: 0 auto 36px;
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.75;
}

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

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  backdrop-filter: blur(12px);
}

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

.stat-num {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-blue);
  text-shadow: 0 0 10px var(--accent-glow);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* 区块通用样式 */
.section {
  padding: 85px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-blue);
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 星座节点地图 (Node Constellation) */
.constellation-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 30px;
  position: relative;
  backdrop-filter: blur(12px);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.constellation-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 14px;
  border-bottom: 1px solid rgba(0, 212, 255, 0.12);
  padding-bottom: 16px;
}

.constellation-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.live-indicator {
  width: 10px;
  height: 10px;
  background: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--success);
  animation: pulse-dot 1.5s infinite;
}

.node-grid-display {
  position: relative;
  min-height: 400px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.node-card {
  background: rgba(11, 17, 44, 0.7);
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 12px;
  padding: 18px;
  position: relative;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.node-card:hover {
  border-color: var(--accent-blue);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.node-flag-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 1rem;
}

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

.node-protocol-tag {
  font-size: 0.72rem;
  background: rgba(0, 212, 255, 0.15);
  color: var(--accent-blue);
  padding: 2px 6px;
  border-radius: 4px;
}

.node-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.node-ping {
  color: var(--success);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 4px;
}

.node-ping::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
}

.node-load-bar {
  margin-top: 10px;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  overflow: hidden;
}

.node-load-fill {
  height: 100%;
  background: linear-gradient(90deg, #00d4ff, #10b981);
  border-radius: 2px;
}

/* 核心优势卡片 (3 Cards) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 36px 28px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-blue), transparent);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 255, 0.45);
  box-shadow: 0 12px 36px rgba(0, 212, 255, 0.12);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-box {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  margin-bottom: 22px;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
}

.feature-card-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.feature-card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.68;
}

.feature-highlights {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.feature-pill-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-main);
  margin-bottom: 8px;
}

.feature-pill-item svg {
  color: var(--accent-blue);
  flex-shrink: 0;
}

/* 流媒体与AI支持图卡 */
.unlock-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.unlock-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 32px;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.unlock-box:hover {
  border-color: rgba(0, 212, 255, 0.4);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.1);
}

.unlock-box-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.unlock-box-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.unlock-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.unlock-tag {
  background: rgba(11, 17, 44, 0.9);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
  transition: var(--transition);
}

.unlock-tag:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: rgba(0, 212, 255, 0.08);
}

.unlock-tag .status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}

/* 价格对比表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 36px 30px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.pricing-card.featured {
  border-color: var(--accent-blue);
  background: linear-gradient(180deg, rgba(13, 25, 65, 0.85) 0%, rgba(11, 17, 44, 0.85) 100%);
  box-shadow: 0 0 35px rgba(0, 212, 255, 0.22);
  transform: scale(1.03);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00d4ff, #0088cc);
  color: #050816;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.pricing-header {
  text-align: center;
  margin-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 24px;
}

.pricing-plan-name {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 8px;
}

.pricing-currency {
  font-size: 1.5rem;
  color: var(--accent-blue);
  font-weight: 700;
}

.pricing-amount {
  font-family: var(--font-heading);
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
}

.pricing-duration {
  font-size: 0.92rem;
  color: var(--text-dim);
}

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

.pricing-features-list {
  margin-bottom: 30px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  margin-bottom: 14px;
  color: var(--text-muted);
}

.pricing-feature-item svg {
  color: var(--accent-blue);
  flex-shrink: 0;
}

.pricing-feature-item strong {
  color: var(--text-main);
}

.pricing-cta {
  width: 100%;
}

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 26px;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.review-card:hover {
  border-color: rgba(0, 212, 255, 0.4);
  transform: translateY(-4px);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(11, 17, 44, 0.8));
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--accent-blue);
}

.review-user-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-main);
}

.review-role {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.review-stars {
  color: #ffb800;
  font-size: 0.85rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-content {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* FAQ 手风琴 */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(0, 212, 255, 0.35);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
}

.faq-question svg {
  transition: transform 0.3s ease;
  color: var(--accent-blue);
  flex-shrink: 0;
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  background: rgba(5, 8, 22, 0.4);
}

.faq-answer-inner {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

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

/* 极简规范页脚 */
.site-footer {
  background: #03050f;
  border-top: 1px solid rgba(0, 212, 255, 0.15);
  padding: 46px 0 36px;
  position: relative;
  z-index: 10;
}

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

.footer-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  position: relative;
  padding: 4px 0;
}

.footer-link:hover {
  color: var(--accent-blue);
  text-shadow: 0 0 10px var(--accent-glow);
}

.footer-copyright {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 20px;
}

/* 文章列表与文章内页样式 (资讯中心) */
.article-header {
  padding: 60px 0 30px;
  text-align: center;
}

.article-list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 60px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.15);
}

.article-card-tag {
  display: inline-block;
  font-size: 0.75rem;
  background: rgba(0, 212, 255, 0.12);
  color: var(--accent-blue);
  padding: 3px 10px;
  border-radius: 12px;
  margin-bottom: 14px;
  width: fit-content;
}

.article-card-title {
  font-family: var(--font-heading);
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: var(--text-main);
}

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

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

.article-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
}

.article-detail-wrap {
  max-width: 860px;
  margin: 0 auto 70px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 48px;
  backdrop-filter: blur(12px);
}

.article-detail-title {
  font-family: var(--font-heading);
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
  color: var(--text-main);
}

.article-meta-bar {
  display: flex;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-content h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--text-main);
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(0, 212, 255, 0.15);
}

.article-content h3 {
  font-size: 1.25rem;
  color: var(--text-main);
  margin: 24px 0 12px;
}

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

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

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

.article-content a {
  color: var(--accent-blue);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-content a:hover {
  text-shadow: 0 0 8px var(--accent-glow);
}

.article-highlight-box {
  background: rgba(0, 212, 255, 0.06);
  border-left: 4px solid var(--accent-blue);
  padding: 18px 22px;
  border-radius: 0 10px 10px 0;
  margin: 24px 0;
}

/* 独立静态页面样式 (关于我们 / 服务条款 / 隐私政策 / 网站地图) */
.legal-page-wrap {
  max-width: 900px;
  margin: 50px auto 80px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 48px;
  backdrop-filter: blur(14px);
}

.legal-page-title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 24px;
  color: var(--text-main);
  border-bottom: 1px solid rgba(0, 212, 255, 0.2);
  padding-bottom: 16px;
}

.legal-section {
  margin-bottom: 32px;
}

.legal-section h2 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--accent-blue);
  margin-bottom: 12px;
}

.legal-section p, .legal-section li {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 10px;
}

.sitemap-group {
  margin-bottom: 28px;
}

.sitemap-group h3 {
  color: var(--accent-blue);
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.sitemap-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.sitemap-links a {
  padding: 10px 14px;
  background: rgba(11, 17, 44, 0.6);
  border: 1px solid rgba(0, 212, 255, 0.12);
  border-radius: 8px;
  color: var(--text-main);
  display: block;
}

.sitemap-links a:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  transform: translateX(4px);
}

/* 响应式媒体查询 (移动端单栏适配与触摸优化) */
@media screen and (max-width: 1024px) {
  .features-grid,
  .pricing-grid,
  .reviews-grid,
  .article-list-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .node-grid-display {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero-title {
    font-size: 2.7rem;
  }
}

@media screen and (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(5, 8, 22, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 24px 20px;
    gap: 18px;
    align-items: flex-start;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    font-size: 1.1rem;
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .hero-section {
    padding: 55px 0 45px;
  }

  .hero-title {
    font-size: 2.1rem;
    line-height: 1.28;
  }

  .hero-desc {
    font-size: 1rem;
    margin-bottom: 28px;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 14px;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 50px;
    font-size: 1.05rem;
  }

  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 18px;
  }

  .section {
    padding: 55px 0;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .features-grid,
  .unlock-grid,
  .pricing-grid,
  .reviews-grid,
  .article-list-grid,
  .sitemap-links {
    grid-template-columns: 1fr;
  }

  .node-grid-display {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .pricing-card.featured {
    transform: none;
  }

  .footer-nav-list {
    flex-direction: column;
    gap: 18px;
  }

  .article-detail-wrap,
  .legal-page-wrap {
    padding: 24px 18px;
  }

  .article-detail-title,
  .legal-page-title {
    font-size: 1.65rem;
  }
}

@media screen and (max-width: 480px) {
  .node-grid-display {
    grid-template-columns: 1fr;
  }

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