/* ==========================================================================
   冲上云霄 (Soar Cloud / FlyV) 官方落地页 - vpnpn.homes
   夜航跑道设计风格 (Night-Runway Theme)
   Deepest night base #07090c / 进近灯光系统 / 塔台无线电 / 沥青跑道 / 琥珀流光
   ========================================================================== */

:root {
  /* 基底：极夜深邃 #07090c */
  --bg-night: #07090c;
  --bg-asphalt: #0b0f17;
  --bg-card: rgba(11, 16, 26, 0.85);
  --bg-card-hover: rgba(16, 24, 39, 0.95);
  
  /* 跑道灯光色彩系统 */
  --amber: #f59e0b;
  --amber-light: #fbbf24;
  --amber-glow: rgba(245, 158, 11, 0.45);
  --amber-laser: #d97706;
  
  --tower-green: #10b981;
  --tower-green-glow: rgba(16, 185, 129, 0.4);
  
  --cyan-hairline: rgba(6, 182, 212, 0.38);
  --cyan-hairline-bright: #06b6d4;
  --cyan-glow: rgba(6, 182, 212, 0.25);
  
  --blue-beacon: #38bdf8;
  --strobe-white: #ffffff;
  
  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, Courier, monospace;
  
  --container-width: 1340px;
  --container-narrow: 920px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-night);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 动态背景画布 */
#skyCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  opacity: 0.95;
}

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

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

ul, ol {
  list-style: none;
}

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

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

/* ==========================================================================
   跑道进近灯光系统 (Approach Lights Row - ALS)
   ========================================================================== */
.approach-lights-bar {
  width: 100%;
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.08) 0%, transparent 100%);
  border-bottom: 1px solid rgba(245, 158, 11, 0.15);
  padding: 8px 0;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  position: relative;
}

.approach-lights-track {
  display: flex;
  align-items: center;
  gap: 22px;
}

.approach-light-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--amber-light);
  box-shadow: 0 0 10px var(--amber), 0 0 20px var(--amber-glow);
  position: relative;
  animation: beaconPulse 2.4s infinite ease-in-out;
}

/* 进近灯光纵深渐隐效果 (Fading opacity for depth) */
.dot-1 { opacity: 0.15; transform: scale(0.65); animation-delay: 0s; }
.dot-2 { opacity: 0.35; transform: scale(0.75); animation-delay: 0.2s; }
.dot-3 { opacity: 0.55; transform: scale(0.85); animation-delay: 0.4s; }
.dot-4 { opacity: 0.75; transform: scale(0.95); animation-delay: 0.6s; }
.dot-center { 
  opacity: 1; 
  transform: scale(1.2); 
  background-color: #ffffff;
  box-shadow: 0 0 14px #ffffff, 0 0 26px var(--amber);
  animation-delay: 0.8s;
}
.dot-5 { opacity: 0.75; transform: scale(0.95); animation-delay: 1.0s; }
.dot-6 { opacity: 0.55; transform: scale(0.85); animation-delay: 1.2s; }
.dot-7 { opacity: 0.35; transform: scale(0.75); animation-delay: 1.4s; }
.dot-8 { opacity: 0.15; transform: scale(0.65); animation-delay: 1.6s; }

@keyframes beaconPulse {
  0%, 100% {
    filter: brightness(0.9);
  }
  50% {
    filter: brightness(1.6);
  }
}

/* ==========================================================================
   Header & 导航栏 (左上角 Logo)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(7, 9, 12, 0.9);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(6, 182, 212, 0.2);
}

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

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo-img {
  height: 44px;
  width: 44px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--cyan-hairline);
  filter: drop-shadow(0 0 10px rgba(6, 182, 212, 0.4));
  transition: var(--transition);
}

.brand-wrapper:hover .brand-logo-img {
  transform: scale(1.06);
  border-color: var(--amber-light);
  box-shadow: 0 0 16px var(--amber-glow);
}

.footer-logo-img {
  height: 48px;
  width: auto;
  border-radius: 6px;
  object-fit: contain;
  margin-bottom: 12px;
  filter: drop-shadow(0 0 10px rgba(6, 182, 212, 0.3));
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-badge-icao {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 1px 6px;
  border-radius: 3px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--tower-green);
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.brand-tagline {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  font-family: var(--font-mono);
}

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

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 2px;
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--amber-light);
  box-shadow: 0 0 8px var(--amber);
  transition: var(--transition);
}

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

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

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

/* 核心 CTA: THRUST · 起飞 (琥珀光芒) */
.btn-thrust {
  background: linear-gradient(135deg, #d97706 0%, #f59e0b 50%, #fbbf24 100%);
  color: #07090c !important;
  font-family: var(--font-sans);
  font-weight: 800;
  letter-spacing: 0.8px;
  border: 1px solid #fde68a;
  box-shadow: 0 0 20px var(--amber-glow), 0 0 40px rgba(245, 158, 11, 0.25);
  text-shadow: 0 1px 1px rgba(255, 255, 255, 0.4);
}

.btn-thrust:hover {
  background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
  box-shadow: 0 0 30px rgba(245, 158, 11, 0.75), 0 0 50px rgba(245, 158, 11, 0.4);
  transform: translateY(-2px);
}

.btn-outline {
  background: rgba(11, 15, 23, 0.7);
  color: var(--text-main);
  border: 1px solid var(--cyan-hairline);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  background: rgba(6, 182, 212, 0.12);
  border-color: var(--cyan-hairline-bright);
  color: #ffffff;
  box-shadow: 0 0 16px var(--cyan-glow);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 34px;
  font-size: 1.08rem;
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-main);
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-main);
  margin: 5px 0;
  transition: var(--transition);
}

.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: 74px;
  left: 0;
  width: 100%;
  background: rgba(7, 9, 12, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--cyan-hairline);
  padding: 20px;
  flex-direction: column;
  gap: 12px;
  z-index: 99;
}

.mobile-nav-drawer.active {
  display: flex;
}

.mobile-nav-link {
  padding: 12px 16px;
  font-size: 1rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(11, 16, 26, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-nav-link:hover {
  background: rgba(6, 182, 212, 0.15);
  color: var(--amber-light);
}

/* ==========================================================================
   Hero 塔台无线电风格 (Tower-Radio Style Hero)
   ========================================================================== */
.hero-section {
  padding: 60px 0 30px 0;
  position: relative;
  text-align: center;
}

/* 塔台无线电通联绿字 (Green Monospace Tower Transmission) */
.tower-radio-bar {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-sm);
  padding: 7px 18px;
  margin-bottom: 26px;
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.15);
}

.radio-beacon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--tower-green);
  box-shadow: 0 0 10px var(--tower-green), 0 0 20px var(--tower-green-glow);
  animation: blink 1.2s infinite ease-in-out;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

.radio-text {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--tower-green);
  letter-spacing: 0.6px;
}

/* 主标题: 大白字「可以起飞」+ 琥珀色点缀 */
.hero-headline {
  font-size: clamp(2.8rem, 6.5vw, 4.8rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  color: #ffffff;
  letter-spacing: -0.5px;
  text-shadow: 0 0 30px rgba(255, 255, 255, 0.2);
}

.headline-amber {
  color: var(--amber-light);
  text-shadow: 0 0 24px var(--amber-glow), 0 0 50px rgba(245, 158, 11, 0.3);
}

.hero-subdesc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 820px;
  margin: 0 auto 36px auto;
  line-height: 1.75;
}

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

/* ==========================================================================
   水平起飞跑道条 (Horizontal Runway Strip)
   暗沥青跑道 / 白色虚线中心线 / 琥珀边缘灯 / 滑行起飞动画 (3s transform)
   ========================================================================== */
.runway-wrapper {
  max-width: 1100px;
  margin: 30px auto 20px auto;
  padding: 0 16px;
}

.runway-strip {
  width: 100%;
  height: 96px;
  background-color: var(--bg-asphalt);
  border-radius: 8px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  cursor: pointer;
  /* 跑道微质感与暗沥青阴影 */
  box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.8), 0 10px 30px rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: border-color 0.4s ease;
}

.runway-strip:hover {
  border-color: rgba(245, 158, 11, 0.5);
}

/* 顶部与底部跑道边缘灯 (Amber Edge Lights - Dotted Glowing Borders) */
.runway-edge-lights-top,
.runway-edge-lights-bottom {
  position: absolute;
  left: 0;
  width: 100%;
  height: 4px;
  background-image: radial-gradient(circle, #fbbf24 2px, transparent 2.5px);
  background-size: 24px 4px;
  background-repeat: repeat-x;
  filter: drop-shadow(0 0 6px var(--amber));
}

.runway-edge-lights-top { top: 3px; }
.runway-edge-lights-bottom { bottom: 3px; }

/* 跑道白色中心虚线 (White Dashed Centerline via repeating-linear-gradient) */
.runway-centerline {
  position: absolute;
  left: 0;
  width: 100%;
  height: 3px;
  top: calc(50% - 1.5px);
  background: repeating-linear-gradient(
    90deg,
    #ffffff 0px,
    #ffffff 36px,
    transparent 36px,
    transparent 64px
  );
  opacity: 0.85;
  filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.6));
}

/* 跑道编号 "36" 与斑马线接地线 */
.runway-threshold {
  position: absolute;
  left: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  z-index: 2;
  user-select: none;
}

.runway-number {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 2px;
}

.runway-piano-keys {
  display: flex;
  gap: 3px;
}

.piano-key {
  width: 3px;
  height: 28px;
  background-color: rgba(255, 255, 255, 0.5);
}

/* 停靠在左侧的 ✈ 战机：悬停 3 秒滑跑并昂首起飞 (3s transform) */
.runway-plane {
  position: absolute;
  left: 90px;
  top: calc(50% - 18px);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  /* 核心 3 秒缓动动画过渡 */
  transition: transform 3s cubic-bezier(0.22, 1, 0.36, 1), opacity 3s ease;
  will-change: transform;
}

.plane-svg {
  width: 34px;
  height: 34px;
  fill: #ffffff;
  filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.8)) drop-shadow(0 0 20px var(--amber));
  transform: rotate(90deg); /* 沿跑道朝右朝前 */
}

/* 尾焰粒子效果 */
.afterburner-flame {
  position: absolute;
  left: -8px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 6px;
  background: linear-gradient(90deg, rgba(245, 158, 11, 0.9), rgba(56, 189, 248, 0.9));
  border-radius: 4px;
  box-shadow: 0 0 12px var(--amber);
  opacity: 0;
  transition: width 0.3s ease, opacity 0.3s ease;
}

/* 当鼠标悬浮在跑道上时：飞机全速滑行并昂首腾空！ */
.runway-strip:hover .runway-plane,
.runway-strip.flying .runway-plane {
  /* X 轴极速滑跑至右侧，Y 轴昂首升空，机头上仰 -18度 */
  transform: translate3d(850px, -65px, 0) scale(1.15) rotate(-16deg);
  opacity: 0.95;
}

.runway-strip:hover .afterburner-flame,
.runway-strip.flying .afterburner-flame {
  width: 24px;
  opacity: 1;
}

.runway-hint-text {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 8px;
  letter-spacing: 0.5px;
}

.runway-hint-text span {
  color: var(--amber-light);
}

/* ==========================================================================
   发光仪表盘统计栏 (Glowing Stat Numerals)
   ========================================================================== */
.stats-flight-deck {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 1040px;
  margin: 36px auto 0 auto;
}

.stat-flight-card {
  background: var(--bg-card);
  border: 1px solid var(--cyan-hairline);
  padding: 18px 16px;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(12px);
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4), inset 0 0 15px rgba(6, 182, 212, 0.04);
  transition: var(--transition);
}

.stat-flight-card:hover {
  border-color: var(--cyan-hairline-bright);
  box-shadow: 0 0 20px var(--cyan-glow);
  transform: translateY(-3px);
}

/* 核心发光数字 (Glowing Stat Numerals) */
.glowing-stat-num {
  font-family: var(--font-mono);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--blue-beacon);
  text-shadow: 0 0 14px rgba(56, 189, 248, 0.65), 0 0 30px rgba(56, 189, 248, 0.3);
  line-height: 1.2;
}

.glowing-stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 5px;
}

/* ==========================================================================
   价格方案区 (所有价格要同排 · 满足用户核心指令)
   ========================================================================== */
.pricing-section {
  padding: 80px 0;
  position: relative;
}

.pricing-container {
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 16px;
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 46px auto;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--amber-light);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  color: #ffffff;
}

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

/* 5个套餐必须同排并列 (Single Row Side-by-Side Flex Layout) */
.pricing-row {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  gap: 14px;
  width: 100%;
  margin-top: 24px;
  overflow-x: auto;
  padding: 10px 4px 20px 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(245, 158, 11, 0.4) rgba(11, 16, 26, 0.6);
}

.pricing-row::-webkit-scrollbar {
  height: 6px;
}

.pricing-row::-webkit-scrollbar-track {
  background: rgba(11, 16, 26, 0.6);
  border-radius: 4px;
}

.pricing-row::-webkit-scrollbar-thumb {
  background: var(--amber);
  border-radius: 4px;
}

.pricing-card {
  flex: 1 1 0;
  min-width: 236px;
  background: var(--bg-card);
  border: 1px solid var(--cyan-hairline);
  border-radius: var(--radius-sm);
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(14px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--cyan-hairline-bright);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.7), 0 0 20px var(--cyan-glow);
  background: var(--bg-card-hover);
}

/* 爆款主力卡片 (HOT 主力推荐) */
.pricing-card.featured {
  border-color: var(--amber);
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.12) 0%, rgba(11, 16, 26, 0.95) 100%);
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.22);
}

.pricing-card.featured:hover {
  border-color: var(--amber-light);
  box-shadow: 0 14px 40px rgba(245, 158, 11, 0.4);
}

.pricing-popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
  color: #07090c;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  white-space: nowrap;
  box-shadow: 0 2px 10px rgba(245, 158, 11, 0.6);
}

.plan-head {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 16px;
  margin-bottom: 16px;
}

.plan-tag-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background: rgba(6, 182, 212, 0.12);
  color: var(--cyan-hairline-bright);
  margin-bottom: 6px;
  border: 1px solid var(--cyan-hairline);
}

.plan-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
}

.plan-subtitle {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.plan-price-wrap {
  margin: 14px 0 10px 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.plan-currency {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--amber-light);
}

.plan-amount {
  font-size: 2.2rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
  font-family: var(--font-mono);
}

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

.plan-sub-price {
  font-size: 0.76rem;
  color: var(--cyan-hairline-bright);
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

.plan-features-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 22px;
  font-size: 0.83rem;
  color: var(--text-secondary);
  flex-grow: 1;
}

.plan-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.45;
}

.plan-features-list li svg {
  width: 15px;
  height: 15px;
  color: var(--amber-light);
  flex-shrink: 0;
  margin-top: 2px;
}

.plan-features-list li strong {
  color: #ffffff;
}

.plan-action-btn {
  width: 100%;
  margin-top: auto;
}

.pricing-footnote {
  text-align: center;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-top: 24px;
}

.pricing-footnote a {
  color: var(--amber-light);
  text-decoration: underline;
}

/* ==========================================================================
   Dark Feature Cards with Cyan Hairlines (核心优势暗色卡片 + 青色发丝线)
   ========================================================================== */
.features-section, .nodes-section, .articles-section, .reviews-section, .faq-section {
  padding: 80px 0;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--cyan-hairline);
  border-radius: var(--radius-sm);
  padding: 28px 24px;
  transition: var(--transition);
  backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
}

.feature-box:hover {
  transform: translateY(-5px);
  border-color: var(--cyan-hairline-bright);
  box-shadow: 0 0 24px var(--cyan-glow);
  background: var(--bg-card-hover);
}

.feature-code-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--cyan-hairline-bright);
  opacity: 0.8;
  margin-bottom: 12px;
  display: block;
  letter-spacing: 1px;
}

.feature-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid var(--cyan-hairline);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--cyan-hairline-bright);
}

.feature-icon-wrap svg {
  width: 24px;
  height: 24px;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   节点测速监控 (Avionics Status)
   ========================================================================== */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.node-card {
  background: var(--bg-card);
  border: 1px solid var(--cyan-hairline);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
}

.node-card:hover {
  border-color: var(--cyan-hairline-bright);
  background: var(--bg-card-hover);
  box-shadow: 0 0 16px var(--cyan-glow);
}

.node-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.node-flag {
  font-size: 1.4rem;
}

.node-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

.node-type {
  font-size: 0.74rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.node-right {
  text-align: right;
}

.node-ping {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--tower-green);
  display: flex;
  align-items: center;
  gap: 6px;
}

.ping-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--tower-green);
  box-shadow: 0 0 8px var(--tower-green);
}

.node-speed {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ==========================================================================
   资讯专栏区 (Articles Grid)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--cyan-hairline);
  border-radius: var(--radius-sm);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--cyan-hairline-bright);
  background: var(--bg-card-hover);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.6), 0 0 16px var(--cyan-glow);
}

.article-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

.article-category-badge {
  color: var(--amber-light);
  background: rgba(245, 158, 11, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.article-card-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.45;
  margin-bottom: 12px;
}

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

.article-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-keywords-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.article-kw-tag {
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.article-read-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--amber-light);
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-card:hover .article-read-link {
  gap: 10px;
}

/* ==========================================================================
   用户真实评价 (Reviews Grid)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--cyan-hairline);
  border-radius: var(--radius-sm);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.review-card:hover {
  border-color: var(--cyan-hairline-bright);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  box-shadow: 0 0 16px var(--cyan-glow);
}

.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, #d97706 0%, #06b6d4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #07090c;
  font-size: 1.05rem;
}

.review-user-info {
  display: flex;
  flex-direction: column;
}

.review-user-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 6px;
}

.verified-badge {
  font-size: 0.68rem;
  color: var(--tower-green);
  background: rgba(16, 185, 129, 0.12);
  padding: 1px 6px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.review-user-tier {
  font-size: 0.74rem;
  color: var(--text-muted);
}

.review-stars {
  color: var(--amber-light);
  font-size: 0.88rem;
  margin-bottom: 10px;
  letter-spacing: 2px;
}

.review-content {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 12px;
}

.review-date {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: right;
  font-family: var(--font-mono);
}

/* ==========================================================================
   常见问题 FAQ 手风琴
   ========================================================================== */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--cyan-hairline);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition);
}

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

.faq-question {
  padding: 18px 22px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-weight: 700;
  font-size: 1.02rem;
  color: #ffffff;
  user-select: none;
}

.faq-icon {
  font-size: 1.2rem;
  color: var(--amber-light);
  transition: transform 0.3s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.35s ease;
  padding: 0 22px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 22px 20px 22px;
}

.faq-answer a {
  color: var(--amber-light);
  text-decoration: underline;
}

/* ==========================================================================
   CTA 底部转化横幅 (THRUST 风格)
   ========================================================================== */
.cta-banner-section {
  padding: 60px 0 80px 0;
}

.cta-banner {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.16) 0%, rgba(6, 182, 212, 0.12) 100%), var(--bg-card);
  border: 1px solid var(--amber);
  border-radius: var(--radius-md);
  padding: 50px 30px;
  text-align: center;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6), 0 0 30px var(--amber-glow);
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 900;
  margin-bottom: 14px;
  color: #ffffff;
}

.cta-banner p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 30px auto;
}

/* ==========================================================================
   页脚 Footer
   ========================================================================== */
.site-footer {
  background: rgba(4, 6, 8, 0.98);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 60px 0 30px 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

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

.footer-brand p {
  margin-top: 12px;
  color: var(--text-muted);
  max-width: 320px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

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

.footer-col a {
  color: var(--text-secondary);
}

.footer-col a:hover {
  color: var(--amber-light);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 18px;
}

/* ==========================================================================
   文章页内联排版规范 (Articles Inner Page)
   ========================================================================== */
.article-page {
  background-color: var(--bg-night);
}

.breadcrumb {
  padding: 24px 0 16px 0;
  font-size: 0.84rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb a:hover {
  color: var(--amber-light);
}

.article-header {
  margin-bottom: 36px;
}

.article-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 16px;
}

.article-info-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.84rem;
  color: var(--text-muted);
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-wrap: wrap;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #cbd5e1;
}

.article-content h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: #ffffff;
  margin: 40px 0 18px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--cyan-hairline);
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 28px 0 14px 0;
}

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

.article-content strong {
  color: #ffffff;
}

.article-content ul, .article-content ol {
  margin: 16px 0 24px 24px;
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

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

.internal-link {
  color: var(--amber-light);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: var(--transition);
}

.internal-link:hover {
  color: #ffffff;
  text-shadow: 0 0 10px var(--amber-glow);
}

.callout {
  padding: 18px 22px;
  border-radius: var(--radius-sm);
  margin: 24px 0;
  border-left: 4px solid var(--amber-light);
  background: var(--bg-card);
  border: 1px solid var(--cyan-hairline);
}

.callout-title {
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.callout-tip {
  border-left-color: var(--tower-green);
  background: rgba(16, 185, 129, 0.08);
}

.callout-warning {
  border-left-color: var(--amber-light);
  background: rgba(245, 158, 11, 0.08);
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--cyan-hairline);
}

.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.table-wrap th, .table-wrap td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.table-wrap th {
  background: rgba(11, 16, 26, 0.95);
  color: #ffffff;
  font-weight: 700;
}

.table-wrap tr:hover td {
  background: rgba(6, 182, 212, 0.05);
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(11, 16, 26, 0.95) 100%);
  border: 1px solid var(--amber);
  border-radius: var(--radius-sm);
  padding: 30px;
  margin: 40px 0;
  text-align: center;
}

.article-cta-box h3 {
  font-size: 1.4rem;
  color: #ffffff;
  margin-bottom: 10px;
}

.article-cta-box p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.related-articles-box {
  background: var(--bg-card);
  border: 1px solid var(--cyan-hairline);
  border-radius: var(--radius-sm);
  padding: 26px;
  margin-top: 50px;
}

.related-articles-box h3 {
  font-size: 1.2rem;
  color: #ffffff;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.related-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  font-size: 0.92rem;
  transition: var(--transition);
}

.related-item a:hover {
  background: rgba(245, 158, 11, 0.12);
  color: var(--amber-light);
  padding-left: 18px;
}

/* ==========================================================================
   响应式断点适配
   ========================================================================== */
@media (max-width: 1200px) {
  .stats-flight-deck {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }
}

@media (max-width: 992px) {
  .nav-links, .nav-actions .btn-outline {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .runway-strip:hover .runway-plane,
  .runway-strip.flying .runway-plane {
    transform: translate3d(500px, -45px, 0) scale(1.1) rotate(-14deg);
  }
}

@media (max-width: 768px) {
  .hero-section {
    padding: 40px 0 30px 0;
  }
  .hero-headline {
    font-size: 2.3rem;
  }
  .stats-flight-deck {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .features-grid, .articles-grid, .reviews-grid, .nodes-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .pricing-row {
    padding-bottom: 24px;
  }
  .pricing-card {
    min-width: 260px;
  }
  .runway-strip {
    height: 80px;
  }
  .runway-plane {
    left: 70px;
  }
  .runway-strip:hover .runway-plane,
  .runway-strip.flying .runway-plane {
    transform: translate3d(260px, -35px, 0) scale(1.05) rotate(-12deg);
  }
}