/* ==========================================================================
   ORBIT PILOT / 太空探索 - 核心样式表
   配色方案:
   #080D23 (深空底色) / #B2A1FF (星轨淡紫) / #57E4FF (科技天蓝) / #FFE29A (操作金黄)
   ========================================================================== */

:root {
  --bg-space: #080D23;
  --bg-deep: #050817;
  --bg-surface: #0E1638;
  --bg-surface-elevated: #15204E;
  --bg-card: rgba(14, 22, 56, 0.72);
  --bg-card-hover: rgba(21, 32, 78, 0.88);
  
  --color-purple: #B2A1FF;
  --color-purple-dim: rgba(178, 161, 255, 0.15);
  --color-purple-border: rgba(178, 161, 255, 0.28);
  
  --color-cyan: #57E4FF;
  --color-cyan-glow: rgba(87, 228, 255, 0.35);
  --color-cyan-dim: rgba(87, 228, 255, 0.12);
  
  --color-yellow: #FFE29A;
  --color-yellow-hover: #FFF1C5;
  --color-yellow-shadow: rgba(255, 226, 154, 0.32);
  
  --text-main: #F2F5FF;
  --text-secondary: #ADC0E6;
  --text-muted: #7284B0;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --container-max: 1200px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 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-space);
  color: var(--text-main);
}

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

/* 三层星空背景（纯 CSS 径向渐变，零 DOM 冗余） */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  background-image: 
    radial-gradient(1px 1px at 25px 35px, #fff, rgba(0,0,0,0)),
    radial-gradient(1.5px 1.5px at 120px 80px, #57E4FF, rgba(0,0,0,0)),
    radial-gradient(1px 1px at 220px 160px, #B2A1FF, rgba(0,0,0,0)),
    radial-gradient(1.2px 1.2px at 340px 45px, #fff, rgba(0,0,0,0)),
    radial-gradient(1.8px 1.8px at 480px 220px, #FFE29A, rgba(0,0,0,0)),
    radial-gradient(1px 1px at 620px 110px, #57E4FF, rgba(0,0,0,0)),
    radial-gradient(1.4px 1.4px at 780px 290px, #fff, rgba(0,0,0,0)),
    radial-gradient(1px 1px at 910px 190px, #B2A1FF, rgba(0,0,0,0)),
    radial-gradient(1.6px 1.6px at 1040px 95px, #57E4FF, rgba(0,0,0,0)),
    radial-gradient(1px 1px at 1160px 240px, #fff, rgba(0,0,0,0));
  background-repeat: repeat;
  background-size: 1200px 360px;
  opacity: 0.65;
}

body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -2;
  background: 
    radial-gradient(circle at 15% 18%, rgba(87, 228, 255, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 32%, rgba(178, 161, 255, 0.09) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(14, 22, 56, 0.8) 0%, transparent 70%);
}

/* 链接与排版通用 */
a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #8bebff;
}

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 3px;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* 辅助与微提示 */
.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--color-cyan-dim);
  color: var(--color-cyan);
  border: 1px solid rgba(87, 228, 255, 0.3);
}

.badge-tag.purple {
  background: var(--color-purple-dim);
  color: var(--color-purple);
  border-color: var(--color-purple-border);
}

.badge-tag.yellow {
  background: rgba(255, 226, 154, 0.12);
  color: var(--color-yellow);
  border-color: rgba(255, 226, 154, 0.35);
}

.notice-pill {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  display: inline-block;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  transition: transform var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

/* 黄色为关键操作专用 */
.btn-primary {
  background-color: var(--color-yellow);
  color: #060919;
  box-shadow: 0 4px 18px var(--color-yellow-shadow);
  border: 1px solid #FFEBB5;
}

.btn-primary:hover {
  background-color: var(--color-yellow-hover);
  color: #030612;
  box-shadow: 0 6px 24px rgba(255, 226, 154, 0.5);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(178, 161, 255, 0.12);
  color: var(--text-main);
  border: 1px solid var(--color-purple-border);
}

.btn-secondary:hover {
  background: rgba(178, 161, 255, 0.22);
  color: #ffffff;
  border-color: var(--color-purple);
  transform: translateY(-2px);
}

.btn-outline-cyan {
  background: var(--color-cyan-dim);
  color: var(--color-cyan);
  border: 1px solid rgba(87, 228, 255, 0.35);
}

.btn-outline-cyan:hover {
  background: rgba(87, 228, 255, 0.22);
  border-color: var(--color-cyan);
  box-shadow: 0 0 16px var(--color-cyan-glow);
  transform: translateY(-2px);
}

/* ==========================================================================
   Header 导航栏
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  background: rgba(8, 13, 35, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(178, 161, 255, 0.15);
  transition: border-color var(--transition-fast);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.brand-logo svg {
  width: 32px;
  height: 32px;
}

.brand-logo .brand-highlight {
  color: var(--color-cyan);
}

.brand-logo .sub-title {
  font-size: 0.72rem;
  color: var(--color-purple);
  display: block;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 22px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px 2px;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--color-cyan);
  transition: width var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text-main);
}

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

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

/* 动效切换按钮 */
.motion-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-purple-border);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.motion-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-main);
}

.motion-toggle-btn[aria-pressed="true"] {
  border-color: var(--color-yellow);
  color: var(--color-yellow);
}

.motion-toggle-btn svg {
  width: 14px;
  height: 14px;
}

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-purple-border);
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-main);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   Hero 首屏 - ORBIT PILOT 专属视觉
   ========================================================================== */
.hero-section {
  padding: 56px 0 72px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.hero-title {
  font-size: 2.65rem;
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-title .glow-text {
  color: var(--color-cyan);
  text-shadow: 0 0 24px rgba(87, 228, 255, 0.4);
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 580px;
}

.briefing-card {
  background: var(--bg-card);
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 8px 32px rgba(5, 8, 23, 0.6);
}

.briefing-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--color-purple);
  font-family: var(--font-mono);
}

.briefing-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 16px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.briefing-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.briefing-list li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-cyan);
  box-shadow: 0 0 6px var(--color-cyan);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.hero-sub-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.hero-sub-cta a {
  color: var(--color-purple);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.hero-sub-cta a:hover {
  color: #d8cfff;
}

/* 右侧太空航线视窗 */
.hero-viewport {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 440px;
}

.orbit-stage {
  width: 100%;
  max-width: 480px;
  height: auto;
  position: relative;
  filter: drop-shadow(0 12px 36px rgba(14, 22, 56, 0.8));
}

/* SVG 内动画与样式控制 */
.orbit-ring {
  transform-origin: 250px 220px;
  animation: orbitRingRotate 45s linear infinite;
}

.orbit-planet {
  filter: drop-shadow(0 0 20px rgba(87, 228, 255, 0.25));
}

.orbit-path-line {
  stroke-dasharray: 8 6;
  animation: orbitPathFlow 25s linear infinite;
}

/* 飞船沿轨道缓慢飞行 */
.spaceship-group {
  transform-origin: center;
  offset-path: path("M 250,55 A 195,120 18 1 1 249.9,55 Z");
  offset-rotate: auto 90deg;
  animation: spaceshipCruise 28s linear infinite;
}

/* 喷焰轻微伸缩 */
.thruster-flame {
  transform-origin: center bottom;
  animation: flamePulse 0.85s ease-in-out infinite alternate;
}

/* 演示加速状态 */
.spaceship-group.is-patrolling {
  animation: spaceshipPatrol 7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.spaceship-group.is-patrolling .thruster-flame {
  animation: flameBoost 0.3s ease-in-out infinite alternate;
}

.orbit-feedback-badge {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(8, 13, 35, 0.88);
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-full);
  padding: 6px 14px;
  font-size: 0.78rem;
  color: var(--color-cyan);
  display: flex;
  align-items: center;
  gap: 8px;
  backdrop-filter: blur(8px);
  white-space: nowrap;
}

.orbit-indicator-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-cyan);
  box-shadow: 0 0 8px var(--color-cyan);
  animation: indicatorBlink 2s infinite;
}

/* 动画关键帧定义 */
@keyframes orbitRingRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes orbitPathFlow {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: 200; }
}

@keyframes spaceshipCruise {
  0% { offset-distance: 0%; }
  100% { offset-distance: 100%; }
}

@keyframes spaceshipPatrol {
  0% { offset-distance: 0%; filter: drop-shadow(0 0 6px var(--color-cyan)); }
  50% { offset-distance: 50%; filter: drop-shadow(0 0 16px var(--color-cyan)); }
  100% { offset-distance: 100%; filter: drop-shadow(0 0 6px var(--color-cyan)); }
}

@keyframes flamePulse {
  0% { transform: scaleY(0.7) scaleX(0.85); opacity: 0.75; }
  100% { transform: scaleY(1.3) scaleX(1.1); opacity: 1; }
}

@keyframes flameBoost {
  0% { transform: scaleY(1.4) scaleX(1.1); opacity: 0.9; }
  100% { transform: scaleY(2.2) scaleX(1.35); opacity: 1; fill: var(--color-yellow); }
}

@keyframes indicatorBlink {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* 动效暂停状态支持（由 body[data-motion="paused"] 控制） */
body[data-motion="paused"] .orbit-ring,
body[data-motion="paused"] .orbit-path-line,
body[data-motion="paused"] .spaceship-group,
body[data-motion="paused"] .thruster-flame,
body[data-motion="paused"] .orbit-indicator-dot {
  animation-play-state: paused !important;
}

/* 系统级减弱动效偏好适配 */
@media (prefers-reduced-motion: reduce) {
  .orbit-ring,
  .orbit-path-line,
  .spaceship-group,
  .thruster-flame,
  .orbit-indicator-dot {
    animation: none !important;
  }
  html {
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Section 共同标题与布局
   ========================================================================== */
.section-block {
  padding: 80px 0;
  position: relative;
}

.section-block.alt-bg {
  background: linear-gradient(180deg, rgba(14, 22, 56, 0.45) 0%, rgba(8, 13, 35, 0.8) 100%);
  border-top: 1px solid rgba(178, 161, 255, 0.12);
  border-bottom: 1px solid rgba(178, 161, 255, 0.12);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 52px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.section-header .section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--color-cyan);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1.3;
}

.section-desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.68;
}

/* ==========================================================================
   1. 发射前检查清单（购买与配置流程）
   ========================================================================== */
.checklist-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  position: relative;
}

.checklist-step-card {
  background: var(--bg-card);
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.checklist-step-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-cyan);
}

.step-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.step-seq {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-cyan);
  opacity: 0.85;
}

.step-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-purple-dim);
  border: 1px solid var(--color-purple-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-purple);
}

.step-icon-wrap svg {
  width: 22px;
  height: 22px;
}

.step-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-main);
}

.step-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex-grow: 1;
}

.step-meta {
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.checklist-disclaimer {
  margin-top: 36px;
  padding: 16px 20px;
  background: rgba(14, 22, 56, 0.4);
  border-left: 3px solid var(--color-purple);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   2. 核心装备舱（核心优势）
   ========================================================================== */
.equipment-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.equipment-card {
  background: var(--bg-card);
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-md);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.equipment-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-cyan);
  box-shadow: 0 10px 30px rgba(5, 8, 23, 0.6);
}

.equipment-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(87, 228, 255, 0.1);
  border: 1px solid rgba(87, 228, 255, 0.28);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-cyan);
}

.equipment-icon svg {
  width: 26px;
  height: 26px;
}

.equipment-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
}

.equipment-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   3. 星际拓扑航线图（全球节点网络）
   ========================================================================== */
.topology-container {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 36px;
  align-items: center;
}

.topology-canvas-wrap {
  background: var(--bg-card);
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.topology-notice-tag {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 0.76rem;
  background: rgba(8, 13, 35, 0.85);
  border: 1px solid rgba(87, 228, 255, 0.35);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  color: var(--color-cyan);
  z-index: 2;
}

.topology-svg {
  width: 100%;
  height: auto;
  display: block;
}

.topology-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.topology-detail-card {
  background: var(--bg-card);
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.topology-node-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.node-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(178, 161, 255, 0.12);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.node-region {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}

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

/* ==========================================================================
   4. 双轨道空间站（AI 与流媒体专区）
   ========================================================================== */
.orbital-stations-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.orbital-station-card {
  background: var(--bg-card);
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: relative;
  overflow: hidden;
}

.orbital-station-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-purple));
}

.station-header {
  display: flex;
  align-items: center;
  gap: 16px;
}

.station-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-cyan-dim);
  border: 1px solid rgba(87, 228, 255, 0.3);
  color: var(--color-cyan);
}

.station-icon.purple {
  background: var(--color-purple-dim);
  border-color: var(--color-purple-border);
  color: var(--color-purple);
}

.station-icon svg {
  width: 28px;
  height: 28px;
}

.station-title {
  font-size: 1.45rem;
  font-weight: 700;
}

.station-tagline {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.supported-platforms-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.platform-pill {
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(178, 161, 255, 0.18);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.station-details-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.station-details-list li {
  position: relative;
  padding-left: 20px;
  line-height: 1.6;
}

.station-details-list li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--color-cyan);
}

.station-caveat {
  margin-top: auto;
  font-size: 0.82rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
  line-height: 1.5;
}

/* ==========================================================================
   5. 任务舱规格（套餐价格比较）
   ========================================================================== */
.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(--color-purple-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  position: relative;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.pricing-card.highlight {
  border-color: var(--color-cyan);
  background: linear-gradient(180deg, rgba(21, 32, 78, 0.85) 0%, rgba(14, 22, 56, 0.9) 100%);
  box-shadow: 0 12px 36px rgba(5, 8, 23, 0.7);
}

.pricing-badge-popular {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--color-yellow);
  color: #060919;
  font-weight: 700;
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pricing-name {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
}

.pricing-target {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.pricing-price-currency {
  font-size: 1.1rem;
  color: var(--color-cyan);
}

.pricing-price-val {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
}

.pricing-period {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.pricing-specs-table {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.pricing-specs-table li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
}

.pricing-spec-label {
  color: var(--text-muted);
}

.pricing-spec-value {
  color: var(--text-main);
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.pricing-actions {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pricing-unverified-notice {
  margin-top: 36px;
  text-align: center;
  font-size: 0.86rem;
  color: var(--text-muted);
}

/* ==========================================================================
   6. 航行日志（SEO 文章 3x3 图卡）
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-cyan);
  box-shadow: 0 12px 32px rgba(5, 8, 23, 0.7);
}

.article-cover-wrap {
  width: 100%;
  height: 175px;
  background: #080D23;
  position: relative;
  overflow: hidden;
  display: block;
  border-bottom: 1px solid rgba(178, 161, 255, 0.2);
}

.article-cover-wrap svg.article-cover-svg {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), filter 0.5s ease;
}

.article-card:hover .article-cover-wrap svg.article-cover-svg {
  transform: scale(1.06);
  filter: brightness(1.12);
}

.article-category-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(8, 13, 35, 0.88);
  border: 1px solid var(--color-cyan);
  color: var(--color-cyan);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 5;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.45);
}

.article-body {
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.42;
}

.article-title a {
  color: var(--text-main);
}

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

.article-snippet {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.article-read-link {
  color: var(--color-cyan);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   7. 返航留言（用户评价）
   ========================================================================== */
.feedback-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.feedback-card {
  background: var(--bg-card);
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
}

.feedback-demo-tag {
  align-self: flex-start;
  font-size: 0.72rem;
  color: var(--color-yellow);
  background: rgba(255, 226, 154, 0.1);
  border: 1px solid rgba(255, 226, 154, 0.25);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.feedback-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  font-style: italic;
  flex-grow: 1;
}

.feedback-pilot {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.pilot-avatar-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-purple-dim);
  border: 1px solid var(--color-purple-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-purple);
  font-weight: 700;
  font-size: 0.8rem;
}

.pilot-meta {
  display: flex;
  flex-direction: column;
}

.pilot-name {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-main);
}

.pilot-scene {
  font-size: 0.76rem;
  color: var(--text-muted);
}

/* ==========================================================================
   8. 地面指挥问答（FAQ 手风琴）
   ========================================================================== */
.faq-accordion-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

details.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

details.faq-item[open] {
  border-color: var(--color-cyan);
  background: rgba(14, 22, 56, 0.88);
}

summary.faq-question {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

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

summary.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--color-cyan);
  font-family: var(--font-mono);
  transition: transform var(--transition-fast);
}

details.faq-item[open] summary.faq-question::after {
  content: "−";
  color: var(--color-yellow);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 16px;
}

/* ==========================================================================
   Footer 底部
   ========================================================================== */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid rgba(178, 161, 255, 0.15);
  padding: 64px 0 32px;
  margin-top: 40px;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-cyan);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
}

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

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

.footer-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.recommended-network-sites {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.recommended-network-sites a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-purple);
  font-size: 0.88rem;
}

.recommended-network-sites a:hover {
  color: var(--color-cyan);
  text-decoration: underline;
}

.footer-bottom-bar {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-legal-links {
  display: flex;
  gap: 16px;
}

.footer-legal-links a {
  color: var(--text-muted);
}

.footer-legal-links a:hover {
  color: var(--text-secondary);
}

/* ==========================================================================
   独立文章页 & 子页面共享样式
   ========================================================================== */
.page-container {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

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

.article-page-header {
  margin-bottom: 36px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.article-page-h1 {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-main);
}

.article-page-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(178, 161, 255, 0.15);
  padding-bottom: 20px;
}

.article-cover-banner {
  width: 100%;
  height: 220px;
  background: #080D23;
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 36px;
  position: relative;
}

.article-cover-banner svg.article-cover-svg {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.article-rich-content {
  font-size: 1.02rem;
  line-height: 1.82;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.article-rich-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 36px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(178, 161, 255, 0.2);
}

.article-rich-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-cyan);
  margin-top: 20px;
}

.article-rich-content p {
  color: #D3DCF2;
}

.article-rich-content ul, .article-rich-content ol {
  padding-left: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-rich-content li {
  line-height: 1.7;
}

.article-data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-data-table th, .article-data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.article-data-table th {
  background: rgba(21, 32, 78, 0.7);
  color: var(--color-cyan);
  font-weight: 600;
}

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

.article-callout {
  background: rgba(14, 22, 56, 0.6);
  border-left: 4px solid var(--color-cyan);
  padding: 18px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.94rem;
  color: var(--text-secondary);
}

.article-callout.warning {
  border-left-color: var(--color-yellow);
}

.article-faq-section {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(178, 161, 255, 0.2);
}

.related-articles-section {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid rgba(178, 161, 255, 0.2);
}

.related-articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.related-article-card {
  background: var(--bg-card);
  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.related-article-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-cyan);
}

.related-article-card h4 {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-main);
}

.related-article-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   响应式断点适配 (375px, 390px, 430px, 768px, 1024px, 1440px)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  
  .hero-viewport {
    order: -1;
    min-height: 380px;
  }

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

  .topology-container {
    grid-template-columns: 1fr;
  }

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

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

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

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

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    height: calc(100vh - 72px);
    background: rgba(8, 13, 35, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 24px;
    gap: 20px;
    border-bottom: 1px solid var(--color-purple-border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
  }

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

  .nav-links a {
    font-size: 1.15rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .checklist-grid {
    grid-template-columns: 1fr;
  }

  .orbital-stations-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }

  .feedback-grid {
    grid-template-columns: 1fr;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
  }

  .related-articles-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .equipment-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-cta-group .btn {
    width: 100%;
  }

  .briefing-list {
    grid-template-columns: 1fr;
  }

  .hero-viewport {
    min-height: 300px;
  }
}