/* ==========================================================================
   ImmTelecom机场 - 深色霓虹赛博朋克主题样式表 (style.css)
   主域名: https://immtelecomjc.mom
   ========================================================================== */

:root {
  --bg-base: #05060f;
  --bg-elevated: #090b1a;
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-bg-hover: rgba(255, 255, 255, 0.055);
  --glass-border: rgba(255, 255, 255, 0.08);
  --neon-cyan: #22d3ee;
  --neon-purple: #a855f7;
  --neon-pink: #ec4899;
  --neon-green: #10b981;
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --text-bright: #ffffff;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --container-width: 1200px;
  --transition-fast: 0.25s cubic-bezier(0.22, 1, 0.36, 1);
  --transition-smooth: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 全屏粒子网络画布 */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

/* 赛博背景环境光晕 */
.cyber-glow-backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 15% 18%, rgba(168, 85, 247, 0.12) 0%, transparent 38%),
    radial-gradient(circle at 85% 22%, rgba(34, 211, 238, 0.11) 0%, transparent 36%),
    radial-gradient(circle at 50% 80%, rgba(236, 72, 153, 0.09) 0%, transparent 42%);
}

/* 容器与通用布局 */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

section {
  padding: 88px 0;
  position: relative;
  z-index: 1;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 玻璃拟态基础卡片 */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

/* 功能卡与可交互卡片 Hover 霓虹青描边发光并上浮 4px */
.cyber-hover-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease, background-color 0.28s ease;
}

.cyber-hover-card:hover {
  transform: translateY(-4px);
  border-color: var(--neon-cyan);
  background: var(--glass-bg-hover);
  box-shadow: 0 8px 28px rgba(34, 211, 238, 0.25), 0 0 14px rgba(34, 211, 238, 0.35), inset 0 0 12px rgba(34, 211, 238, 0.08);
}

/* 滚动渐显动画 (IntersectionObserver) */
.reveal-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1), transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.reveal-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 吸顶毛玻璃导航栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 6, 15, 0.78);
  border-bottom: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 20px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.32rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-bright);
}

.brand-logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple), var(--neon-pink));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.45);
  font-weight: 900;
  color: #05060f;
  font-size: 1rem;
}

.brand-logo-text {
  background: linear-gradient(90deg, #ffffff 0%, var(--neon-cyan) 55%, var(--neon-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
}

.nav-links a {
  font-size: 0.96rem;
  font-weight: 500;
  color: var(--text-main);
  position: relative;
  padding: 6px 2px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-pink));
  transition: width var(--transition-fast);
  box-shadow: 0 0 8px var(--neon-cyan);
}

.nav-links a:hover {
  color: var(--neon-cyan);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 按钮体系 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  color: #ffffff;
  background: linear-gradient(135deg, var(--neon-purple) 0%, var(--neon-pink) 100%);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 4px 20px rgba(168, 85, 247, 0.38), 0 0 15px rgba(236, 72, 153, 0.28);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 28px rgba(236, 72, 153, 0.72), 0 0 46px rgba(168, 85, 247, 0.55);
  filter: brightness(1.08);
  color: #ffffff;
}

.btn-cyber-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--neon-cyan);
  background: rgba(34, 211, 238, 0.06);
  border: 1px solid rgba(34, 211, 238, 0.55);
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.16);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.btn-cyber-outline:hover {
  transform: translateY(-2px);
  background: rgba(34, 211, 238, 0.15);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 26px rgba(34, 211, 238, 0.52);
  color: #ffffff;
}

.btn-sm {
  padding: 9px 20px;
  font-size: 0.9rem;
}

/* 移动端汉堡按钮 */
.menu-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  color: var(--neon-cyan);
  width: 42px;
  height: 42px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.25rem;
}

/* Hero 主视觉区 */
.hero-section {
  padding: 96px 0 76px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 18px;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.35);
  color: var(--neon-cyan);
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 26px;
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.15);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 10px var(--neon-cyan);
  animation: pulseGlow 1.8s infinite ease-in-out;
}

.hero-title {
  font-size: clamp(2.1rem, 4.6vw, 3.65rem);
  font-weight: 900;
  line-height: 1.22;
  color: var(--text-bright);
  max-width: 960px;
  margin: 0 auto 22px;
  letter-spacing: -0.5px;
}

.hero-title-neon {
  display: block;
  margin-top: 8px;
  background: linear-gradient(90deg, var(--neon-cyan) 0%, var(--neon-purple) 50%, var(--neon-pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 22px rgba(168, 85, 247, 0.35));
}

/* 打字机副标题容器 */
.typewriter-wrapper {
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: clamp(1.08rem, 2.1vw, 1.38rem);
  font-weight: 600;
  color: var(--neon-cyan);
}

.typewriter-cursor {
  display: inline-block;
  width: 10px;
  height: 1.25em;
  background-color: var(--neon-cyan);
  margin-left: 6px;
  vertical-align: text-bottom;
  box-shadow: 0 0 10px var(--neon-cyan);
  animation: cursorBlink 0.85s steps(2, start) infinite;
}

@keyframes cursorBlink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

.hero-desc {
  max-width: 780px;
  margin: 0 auto 36px;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 56px;
}

/* Hero 3个核心数据指标卡片 */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  max-width: 920px;
  margin: 0 auto;
}

.stat-card {
  padding: 26px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 15%;
  right: 15%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-purple), transparent);
}

.stat-value {
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  font-weight: 900;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.96rem;
  color: var(--text-main);
  font-weight: 600;
}

.stat-sub {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* 区块公共标题 */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--neon-pink);
  background: rgba(236, 72, 153, 0.1);
  border: 1px solid rgba(236, 72, 153, 0.35);
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
  font-weight: 800;
  color: var(--text-bright);
  margin-bottom: 14px;
  line-height: 1.3;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.02rem;
}

/* 产品核心优势介绍（3个图文卡片） */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.advantage-card {
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.advantage-illust {
  width: 100%;
  height: 175px;
  border-radius: var(--radius-sm);
  background: rgba(9, 11, 26, 0.75);
  border: 1px solid rgba(34, 211, 238, 0.16);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 12px;
}

.advantage-illust img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.advantage-card h3 {
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--text-bright);
}

.advantage-card p {
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.75;
}

/* 6张功能卡网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 28px 24px;
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.16), rgba(168, 85, 247, 0.16));
  border: 1px solid rgba(34, 211, 238, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  color: var(--neon-cyan);
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.15);
}

.feature-card h3 {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.7;
}

/* 流媒体与人工智能支持图卡 */
.media-ai-showcase {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 32px;
  align-items: center;
  padding: 38px;
}

.media-ai-content h3 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-bright);
  margin-bottom: 16px;
}

.media-ai-content p {
  color: var(--text-muted);
  margin-bottom: 22px;
  font-size: 0.98rem;
}

.media-tags-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  list-style: none;
}

.media-tag-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(168, 85, 247, 0.28);
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--text-main);
}

.media-tag-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--neon-pink);
  box-shadow: 0 0 8px var(--neon-pink);
  flex-shrink: 0;
}

.media-ai-visual {
  border-radius: var(--radius-md);
  background: rgba(5, 6, 15, 0.65);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 20px;
  box-shadow: inset 0 0 28px rgba(168, 85, 247, 0.12);
}

/* 节点网格带绿色延迟圆点 */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.node-card {
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.node-region {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--text-bright);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--neon-green);
  box-shadow: 0 0 12px var(--neon-green);
  display: inline-block;
  animation: pulseGlow 1.6s infinite ease-in-out;
}

@keyframes pulseGlow {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.28);
    opacity: 0.65;
  }
}

.node-latency {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--neon-green);
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.35);
  padding: 3px 10px;
  border-radius: 999px;
}

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

.node-bar-track {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 999px;
  overflow: hidden;
}

.node-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
}

/* 套餐价格表（3档） */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.pricing-card.popular {
  border: 1.5px solid var(--neon-pink);
  background: linear-gradient(180deg, rgba(236, 72, 153, 0.08) 0%, rgba(255, 255, 255, 0.03) 100%);
  box-shadow: 0 0 36px rgba(236, 72, 153, 0.24), inset 0 0 18px rgba(236, 72, 153, 0.08);
  transform: translateY(-8px);
}

.pricing-card.popular:hover {
  transform: translateY(-12px);
  box-shadow: 0 0 44px rgba(236, 72, 153, 0.42), 0 0 20px rgba(34, 211, 238, 0.25);
}

.popular-ribbon {
  position: absolute;
  top: -14px;
  right: 24px;
  background: linear-gradient(135deg, var(--neon-purple), var(--neon-pink));
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 5px 16px;
  border-radius: 999px;
  box-shadow: 0 4px 16px rgba(236, 72, 153, 0.5);
}

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

.plan-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--glass-border);
}

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

.price-amount {
  font-size: 2.85rem;
  font-weight: 900;
  color: var(--text-bright);
  line-height: 1;
}

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

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-main);
}

.check-mark {
  color: var(--neon-cyan);
  font-weight: 900;
  flex-shrink: 0;
}

/* 用户评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.review-card {
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}

.review-stars {
  color: #fbbf24;
  font-size: 1.05rem;
  letter-spacing: 2px;
}

.review-text {
  color: var(--text-main);
  font-size: 0.96rem;
  line-height: 1.78;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--glass-border);
}

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #05060f;
}

.author-name {
  font-weight: 700;
  color: var(--text-bright);
  font-size: 0.96rem;
}

.author-role {
  font-size: 0.83rem;
  color: var(--text-muted);
}

/* FAQ 手风琴 (<details> + <summary>) */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-item[open] {
  border-color: rgba(34, 211, 238, 0.5);
  box-shadow: 0 0 24px rgba(34, 211, 238, 0.14);
}

.faq-item summary {
  list-style: none;
  padding: 20px 24px;
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--text-bright);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  user-select: none;
}

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

.faq-indicator {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.35);
  color: var(--neon-cyan);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
  flex-shrink: 0;
}

.faq-item[open] .faq-indicator {
  transform: rotate(45deg);
  background: var(--neon-cyan);
  color: #05060f;
}

.faq-answer {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.78;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 16px;
}

/* 通栏霓虹 CTA 横幅 */
.cta-banner {
  padding: 56px 36px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 20% 50%, rgba(168, 85, 247, 0.24), transparent 55%),
    radial-gradient(circle at 80% 50%, rgba(34, 211, 238, 0.22), transparent 55%),
    rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(34, 211, 238, 0.32);
  text-align: center;
  box-shadow: 0 0 42px rgba(168, 85, 247, 0.2);
}

.cta-banner h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--text-bright);
  margin-bottom: 14px;
}

.cta-banner p {
  color: var(--text-main);
  max-width: 660px;
  margin: 0 auto 28px;
  font-size: 1.02rem;
}

/* 严格规范页脚（只保留四个标题链接） */
.site-footer {
  position: relative;
  z-index: 1;
  padding: 40px 0;
  border-top: 1px solid var(--glass-border);
  background: rgba(5, 6, 15, 0.88);
  backdrop-filter: blur(12px);
}

.footer-links-only {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 42px;
}

.footer-links-only a {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.footer-links-only a:hover {
  color: var(--neon-cyan);
  border-color: rgba(34, 211, 238, 0.35);
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.2);
}

/* 独立子页面与资讯中心通用样式 */
.subpage-hero {
  padding: 68px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--glass-border);
}

.subpage-content {
  padding: 56px 0 84px;
}

.prose-box {
  padding: 40px;
  margin-bottom: 32px;
}

.prose-box h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--neon-cyan);
  margin: 28px 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--glass-border);
}

.prose-box h2:first-child {
  margin-top: 0;
}

.prose-box h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-bright);
  margin: 22px 0 10px;
}

.prose-box p {
  color: var(--text-main);
  margin-bottom: 16px;
  line-height: 1.85;
  text-align: justify;
}

.prose-box ul,
.prose-box ol {
  margin: 12px 0 20px 24px;
  color: var(--text-main);
}

.prose-box li {
  margin-bottom: 8px;
  line-height: 1.78;
}

.prose-box a {
  color: var(--neon-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.prose-box a:hover {
  color: var(--neon-pink);
}

/* 资讯页目录卡片与文章排版 */
.toc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 56px;
}

.toc-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-num {
  font-size: 0.84rem;
  font-weight: 800;
  color: var(--neon-pink);
}

.toc-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-bright);
  line-height: 1.45;
}

.seo-article {
  padding: 44px;
  margin-bottom: 44px;
  scroll-margin-top: 94px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.86rem;
  color: var(--neon-cyan);
  margin-bottom: 16px;
}

.seo-article h2 {
  font-size: clamp(1.45rem, 2.4vw, 1.95rem);
  font-weight: 800;
  color: var(--text-bright);
  margin-bottom: 22px;
  line-height: 1.38;
}

.seo-article h3 {
  font-size: 1.26rem;
  font-weight: 700;
  color: var(--neon-cyan);
  margin: 28px 0 12px;
  padding-left: 12px;
  border-left: 3px solid var(--neon-purple);
}

.seo-article p {
  color: var(--text-main);
  margin-bottom: 16px;
  line-height: 1.9;
  font-size: 1.01rem;
  text-align: justify;
}

.seo-article a {
  color: var(--neon-cyan);
  font-weight: 600;
  border-bottom: 1px dashed var(--neon-cyan);
}

.seo-article a:hover {
  color: var(--neon-pink);
  border-bottom-color: var(--neon-pink);
}

/* 响应式设计 (@media) */
@media (max-width: 1024px) {
  .advantages-grid,
  .features-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .media-ai-showcase {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  section {
    padding: 64px 0;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    background: rgba(5, 6, 15, 0.96);
    border-bottom: 1px solid var(--glass-border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 14px;
    display: none;
  }

  .nav-links.active {
    display: flex;
  }

  .hero-stats-grid,
  .advantages-grid,
  .features-grid,
  .nodes-grid,
  .pricing-grid,
  .reviews-grid,
  .toc-grid,
  .media-tags-list {
    grid-template-columns: 1fr;
  }

  .hero-cta-group {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-cta-group a {
    width: 100%;
    min-height: 50px;
  }

  .seo-article,
  .prose-box,
  .media-ai-showcase,
  .cta-banner {
    padding: 24px 18px;
  }

  .footer-links-only {
    gap: 18px;
  }
}