/**
 * 武汉一号（LUOJIA-3 02）× DeepSeek Harness 开发者极简航天科技主题样式表
 * 灵感源自 DeepSeek Harness 开发者预览版官方设计系统 (一切皆插件 / 一切皆孪生)
 * 特性：极简前沿暗黑美学、DeepSeek 电光纯蓝、精致金属流光徽章、macOS 终端代码视窗、悬浮流光卡片
 */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,100..1000;1,9..40,100..1000&family=JetBrains+Mono:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;600;700;900&display=swap');

:root {
  /* --------------------------------------------------------------------------
     1. DeepSeek Harness 官方色彩体系 (Dark Minimalist Developer Palette)
     -------------------------------------------------------------------------- */
  --ds-page: #0b0d13;
  --ds-page-trans: rgba(11, 13, 19, 0.85);
  --ds-brand: #4d6bfe;
  --ds-brand-light: #708bff;
  --ds-brand-glow: rgba(77, 107, 254, 0.35);
  --ds-brand-hover: #3b5bdb;

  --ds-primary: #ffffff;
  --ds-title: #f1f5f9;
  --ds-description: #94a3b8;
  --ds-muted: #64748b;

  --ds-surface: rgba(255, 255, 255, 0.03);
  --ds-surface-hover: rgba(255, 255, 255, 0.06);
  --ds-surface-card: rgba(18, 22, 34, 0.65);
  --ds-border: rgba(255, 255, 255, 0.08);
  --ds-border-light: rgba(255, 255, 255, 0.16);

  /* --------------------------------------------------------------------------
     2. 字体与排版
     -------------------------------------------------------------------------- */
  --font-sans: 'DM Sans', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* --------------------------------------------------------------------------
     3. 动画与圆角
     -------------------------------------------------------------------------- */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-pill: 9999px;

  --ease-ds: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* DeepSeek 官方 --enter-y 渐变入场动画系统 */
@keyframes dsHeroEnter {
  from {
    opacity: 0;
    transform: translateY(var(--enter-y, 20px));
    filter: blur(var(--enter-blur, 8px));
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

.ds-hero-enter {
  animation: dsHeroEnter var(--enter-duration, 0.9s) var(--ease-ds) forwards;
  animation-delay: var(--enter-delay, 0s);
  opacity: 0;
}

/* DeepSeek 特技 1: Conic Border-Beam 金属流光环绕动画 */
@keyframes borderBeamRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.ds-border-beam {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  overflow: hidden;
  z-index: 1;
}

.ds-border-beam::after {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: conic-gradient(from 0deg at 50% 50%, transparent 0%, rgba(77, 107, 254, 0.7) 25%, transparent 35%);
  animation: borderBeamRotate 6s linear infinite;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  padding: 1.5px;
}

/* DeepSeek 特技 2: 状态指示灯同心扩散脉冲波纹 */
.status-pulse-ring {
  position: relative;
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  display: inline-block;
}

.status-pulse-ring::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1.5px solid #22c55e;
  animation: pulseRipple 2s cubic-bezier(0, 0.2, 0.8, 1) infinite;
}

@keyframes pulseRipple {
  0% { transform: scale(0.6); opacity: 1; }
  100% { transform: scale(2.6); opacity: 0; }
}

/* DeepSeek 特技 3: 终端光标闪烁 */
.terminal-cursor {
  display: inline-block;
  width: 7px;
  height: 13px;
  background: #60a5fa;
  margin-left: 4px;
  vertical-align: middle;
  animation: termBlink 1s step-end infinite;
}

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

/* 全局胶片噪点质感覆盖层 (Film Grain Overlay) */
.film-grain-overlay {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* 屏幕底端极细叙事滚动进度条 */
.ds-scroll-progress-line {
  position: fixed;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, #4d6bfe 0%, #00e5ff 100%);
  box-shadow: 0 0 8px rgba(77, 107, 254, 0.8);
  z-index: 120;
  transition: width 0.1s ease-out;
}

/* ==========================================================================
   全局重置与深空暗色基础
   ========================================================================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--ds-page);
  color: var(--ds-primary);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

body {
  width: 100%;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  background-color: var(--ds-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   2. 固定全屏 3D WebGL 画布与 DeepSeek 鼠标交互聚光灯
   ========================================================================== */
#bg-canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

.stars-subtle-overlay {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(6, 8, 16, 0.85) 100%);
}

/* ==========================================================================
   3. DeepSeek Harness 风格顶部极简导航栏 (Header Bar)
   ========================================================================== */
.official-navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 60px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  background: rgba(6, 8, 16, 0.45);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: background 0.3s ease;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--ds-primary);
}

.brand-logo-icon {
  width: 26px;
  height: 26px;
  background: linear-gradient(135deg, #4d6bfe 0%, #2563eb 100%);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px var(--ds-brand-glow);
}

.brand-logo-icon svg {
  width: 15px;
  height: 15px;
  color: #ffffff;
}

.brand-text-name {
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ds-primary);
}

/* DeepSeek 经典金属流光胶囊徽标 */
.ds-badge-gradient {
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-pill);
  padding: 1px;
  background: linear-gradient(135deg, rgba(255,255,255,0.45) 0%, rgba(255,255,255,0.08) 35%, rgba(255,255,255,0.04) 65%, rgba(255,255,255,0.30) 100%);
  box-shadow: 0 0 16px rgba(255,255,255,0.06);
}

.ds-badge-inner {
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  line-height: 1;
  background: rgba(6, 8, 16, 0.85);
  color: rgba(255, 255, 255, 0.95);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* 导航链接 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 13px;
  font-weight: 500;
  color: #64748b;
  text-decoration: none;
  transition: var(--transition-fast);
  padding: 6px 4px;
}

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

/* 头部操作按钮组 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ds-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  font-size: 12.5px;
  font-weight: 500;
  color: #0b0d13;
  background: #ffffff;
  border: none;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.2);
}

.ds-btn-primary:hover {
  background: #f1f5f9;
  transform: translateY(-1px);
}

.ds-btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  font-size: 12.5px;
  font-weight: 500;
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.ds-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

/* ==========================================================================
   4. 滚动驱动 3D 叙事容器 (Scroll Story Wrapper)
   ========================================================================= */
#story-scroll-container {
  position: relative;
  z-index: 10;
  width: 100%;
}

.story-section {
  min-height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 6vw;
  pointer-events: none;
}

.story-card-interactive {
  pointer-events: auto;
  max-width: 780px;
  width: 100%;
  margin: 0 auto;
}

/* ==========================================================================
   5. SpaceX / DeepSeek 级非对称“左文右球”大画幅 Hero 巨幕版式
   ========================================================================== */
.hero-section-full {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 120px 6vw 80px 6vw;
  pointer-events: none;
}

.ds-hero-container {
  width: 100%;
  max-width: 620px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  text-align: left;
  gap: 24px;
  pointer-events: none;
  margin: 0;
}

/* 左侧通透深空悬浮文字区 (激光雕刻级清晰度，零地表遮挡) */
.ds-hero-left {
  pointer-events: auto;
  width: 100%;
  max-width: 600px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 22px;
  margin: 0;
  text-align: left;
}

.hero-preview-tag {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-tag-text {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: #94a3b8;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* 震撼纯白紧凑主标题 (Display Typography - 超大字阶，左侧深空激光刻印) */
.ds-hero-title {
  font-size: clamp(38px, 4.2vw, 62px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: #ffffff;
  background: linear-gradient(180deg, #ffffff 60%, rgba(255, 255, 255, 0.75) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 24px rgba(0, 0, 0, 0.95));
}

.ds-hero-desc {
  font-size: 16px;
  line-height: 1.75;
  color: #cbd5e1;
  font-weight: 400;
  max-width: 540px;
  margin: 0;
  letter-spacing: -0.01em;
  text-align: left;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.9);
}

/* DeepSeek 标志性药丸胶囊按钮组 (左对齐) */
.ds-capsule-btn-group {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 12px;
  width: 100%;
  margin-top: 8px;
}

.ds-capsule-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 26px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  outline: none;
}

.ds-capsule-primary {
  background: #ffffff;
  color: #0b0d13;
  box-shadow: 0 4px 24px rgba(255, 255, 255, 0.28);
}

.ds-capsule-primary:hover {
  background: #f8fafc;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255, 255, 255, 0.45);
}

.ds-capsule-ghost {
  background: rgba(255, 255, 255, 0.06);
  color: #cbd5e1;
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.ds-capsule-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.35);
  color: #ffffff;
  transform: translateY(-2px);
}

/* 右下角: 悬浮式极客 macOS 航天遥测视窗 (340px 微型视窗，Border Beam 流光) */
.ds-hero-right {
  pointer-events: auto;
  flex: 0 0 340px;
  margin-bottom: 10px;
}

.ds-terminal-card {
  position: relative;
  width: 100%;
  border-radius: 14px;
  background: rgba(6, 8, 16, 0.55);
  backdrop-filter: blur(32px) saturate(180%);
  -webkit-backdrop-filter: blur(32px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.10);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.ds-terminal-card:hover {
  border-color: rgba(77, 107, 254, 0.4);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.8), 0 0 24px rgba(77, 107, 254, 0.15);
}

.ds-terminal-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.ds-window-dots {
  display: flex;
  align-items: center;
  gap: 5px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.ds-terminal-tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.04);
  padding: 2px;
  border-radius: 6px;
}

.terminal-tab {
  padding: 2px 8px;
  font-size: 10px;
  font-weight: 500;
  border: none;
  background: transparent;
  color: #94a3b8;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.terminal-tab.active {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.btn-terminal-copy {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: #94a3b8;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.btn-terminal-copy:hover {
  color: #ffffff;
}

.ds-terminal-body {
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
}

.terminal-cmd-line {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #cbd5e1;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
}

.prompt-sign {
  color: var(--ds-brand);
  font-weight: 700;
}

.prompt-cmd {
  color: #f1f5f9;
  font-weight: 500;
}

.terminal-output-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.t-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
}

.t-subsat {
  padding-top: 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.t-key {
  color: #64748b;
  font-size: 11px;
}

.t-val {
  color: #cbd5e1;
  font-weight: 500;
}

.text-white { color: #ffffff; font-weight: 600; }
.text-nominal { color: #28c840; font-weight: 600; }
.text-brand { color: #60a5fa; font-weight: 600; }

/* ==========================================================================
   6. 8 大滚动章节卡片 (极薄毛玻璃 + 巨幅空间序号水印 + 鼠标动态聚光灯)
   ========================================================================== */
.ds-feature-card {
  position: relative;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(6, 8, 16, 0.55);
  backdrop-filter: blur(32px) saturate(180%);
  -webkit-backdrop-filter: blur(32px) saturate(180%);
  padding: 32px 36px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: all var(--transition-normal);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

/* 巨幅 120px 空间半透明序号水印 (杂志级层次感) */
.card-step-watermark {
  position: absolute;
  top: -15px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 110px;
  font-weight: 900;
  line-height: 1;
  color: rgba(255, 255, 255, 0.035);
  pointer-events: none;
  user-select: none;
  z-index: 1;
  letter-spacing: -0.05em;
}

/* 鼠标跟随聚光灯发光层 (Mouse Spotlight Glow) */
.ds-feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  border-radius: inherit;
  background: radial-gradient(
    400px circle at var(--mouse-x, -500px) var(--mouse-y, -500px),
    rgba(77, 107, 254, 0.20),
    rgba(0, 229, 255, 0.06) 40%,
    transparent 80%
  );
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.4s var(--ease-ds);
}

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

.ds-feature-card:hover {
  border-color: rgba(255, 255, 255, 0.20);
  transform: translateY(-2px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.75), 0 0 20px rgba(77, 107, 254, 0.12);
}

.card-tag-row {
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 2;
}

.card-title {
  font-size: clamp(24px, 2.8vw, 32px);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #ffffff;
  line-height: 1.2;
  z-index: 2;
}

.card-desc {
  font-size: 13.5px;
  line-height: 1.85;
  color: #94a3b8;
  z-index: 2;
}

.card-grid-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 4px;
  z-index: 2;
}

.metric-item {
  padding: 14px 16px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all var(--transition-fast);
}

.metric-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-1px);
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 2px;
  letter-spacing: -0.02em;
}

.metric-lbl {
  font-size: 11.5px;
  color: #64748b;
  font-weight: 500;
}

/* ==========================================================================
   7. 右侧 8 幕电影级叙事快捷导航器 (Scroll Dot Nav)
   ========================================================================== */
.scroll-dot-nav {
  position: fixed;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.dot-item {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  text-decoration: none;
  cursor: pointer;
}

.dot-label {
  font-family: var(--font-sans);
  font-size: 11.5px;
  font-weight: 500;
  color: #94a3b8;
  background: rgba(11, 13, 19, 0.85);
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--ds-border);
  opacity: 0;
  transform: translateX(10px);
  transition: var(--transition-fast);
  pointer-events: none;
  white-space: nowrap;
}

.dot-item:hover .dot-label {
  opacity: 1;
  transform: translateX(0);
}

.dot-circle {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  transition: var(--transition-fast);
}

.dot-item:hover .dot-circle {
  background: #60a5fa;
  transform: scale(1.4);
}

.dot-item.active .dot-circle {
  background: #3b82f6;
  box-shadow: 0 0 10px #3b82f6, 0 0 20px #60a5fa;
  transform: scale(1.5);
}

/* ==========================================================================
   8. 底部遥测流与三维自由探索悬浮工具栏
   ========================================================================== */
.telemetry-bottom-strip {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 38px;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: rgba(11, 13, 19, 0.85);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--ds-border);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ds-muted);
}

.telemetry-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.telemetry-val {
  color: var(--ds-description);
  font-weight: 500;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #28c840;
  box-shadow: 0 0 8px #28c840;
}

/* 自由探索模式悬浮栏 */
.explore-mode-bar {
  position: fixed;
  top: 76px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  z-index: 95;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 18px;
  border-radius: 30px;
  background: rgba(11, 13, 19, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--ds-border-light);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

body.mode-free .explore-mode-bar {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.explore-bar-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.explore-title {
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
}

.explore-hint {
  font-size: 11.5px;
  color: #94a3b8;
}

.explore-cam-presets {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 0, 0, 0.4);
  padding: 3px 6px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.cam-preset-btn {
  background: none;
  border: none;
  color: #94a3b8;
  font-size: 11.5px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.cam-preset-btn:hover {
  color: #ffffff;
}

.cam-preset-btn.active {
  background: var(--ds-brand);
  color: #ffffff;
  box-shadow: 0 0 10px var(--ds-brand-glow);
}

/* 卫星部件悬浮与点击解析气泡卡片 (HUD Tooltip) */
.part-tooltip-card {
  position: fixed;
  bottom: 56px;
  right: 32px;
  z-index: 95;
  width: 320px;
  padding: 20px;
  border-radius: 14px;
  background: rgba(11, 13, 19, 0.90);
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  border: 1px solid var(--ds-border-light);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.7);
  display: none;
  flex-direction: column;
  gap: 8px;
  animation: tooltipFadeIn 0.25s ease-out forwards;
}

.part-tooltip-card.active {
  display: flex;
}

@keyframes tooltipFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

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

.pt-tag {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  color: #60a5fa;
}

.pt-close-btn {
  background: none;
  border: none;
  color: #94a3b8;
  font-size: 18px;
  cursor: pointer;
  line-height: 1;
}

.pt-title {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
}

.pt-desc {
  font-size: 12.5px;
  line-height: 1.65;
  color: #cbd5e1;
}

/* ==========================================================================
   8. 全平台多分辨率 / 多设备响应式深度适配系统
   ========================================================================== */

/* 4K 与超宽带显示器 (> 1920px) */
@media (min-width: 1921px) {
  .ds-hero-container {
    max-width: 760px;
  }
  .ds-hero-title {
    font-size: 68px;
  }
  .ds-hero-desc {
    font-size: 18px;
    max-width: 640px;
  }
}

/* 常规笔记本与小高度屏幕 (高度 < 820px) */
@media (max-height: 820px) and (min-width: 901px) {
  .hero-section-full {
    padding-top: 80px;
    padding-bottom: 40px;
  }
  .ds-hero-container {
    gap: 16px;
  }
  .ds-hero-left {
    gap: 14px;
  }
  .ds-hero-title {
    font-size: clamp(32px, 3.6vw, 48px);
  }
  .ds-hero-desc {
    font-size: 14px;
    line-height: 1.6;
  }
}

/* 平板与中等屏幕 (max-width: 1100px) */
@media (max-width: 1100px) {
  .nav-menu {
    gap: 16px;
  }
  .nav-link {
    font-size: 12.5px;
  }
  .ds-hero-container {
    max-width: 500px;
  }
  .ds-hero-title {
    font-size: 38px;
  }
}

/* 竖屏平板与移动端设备 (max-width: 900px 响应式重构) */
@media (max-width: 900px) {
  /* 1. 顶部 Header 极简轻量化 */
  .official-navbar {
    padding: 0 12px;
    height: 50px;
    background: rgba(6, 8, 16, 0.75);
  }
  .brand-wrapper {
    gap: 8px;
  }
  .brand-logo-icon {
    width: 22px;
    height: 22px;
  }
  .brand-text-name {
    font-size: 14px;
    white-space: nowrap;
  }
  .brand-wrapper .ds-badge-gradient {
    display: none !important;
  }
  .nav-menu {
    display: none !important;
  }
  .scroll-dot-nav {
    display: none !important;
  }
  
  /* 隐藏非关键顶部按钮，只保留三维自由探索 */
  .nav-actions {
    display: flex;
    align-items: center;
    gap: 6px;
  }
  #btn-reset-view,
  #btn-toggle-audio,
  .nav-actions .ds-btn-secondary {
    display: none !important;
  }
  #btn-toggle-free-cam {
    padding: 4px 12px;
    font-size: 12px;
    height: 30px;
  }

  /* 2. 电影级“上球下文”首屏布局 (Top 55% 震撼地球 + Bottom 45% 悬浮操作抽屉) */
  .hero-section-full {
    align-items: flex-end !important;
    justify-content: center !important;
    padding: 0 14px 44px 14px !important;
    min-height: 100vh;
  }
  
  .ds-hero-container {
    max-width: 100% !important;
    margin: 0 !important;
    width: 100%;
  }
  
  .ds-hero-left {
    align-items: flex-start !important;
    text-align: left !important;
    max-width: 100% !important;
    background: rgba(11, 13, 19, 0.82) !important;
    border: 1px solid rgba(255, 255, 255, 0.12) !important;
    padding: 16px 14px !important;
    border-radius: 16px !important;
    backdrop-filter: blur(24px) !important;
    -webkit-backdrop-filter: blur(24px) !important;
    gap: 10px !important;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.75);
  }
  
  .hero-preview-tag {
    justify-content: flex-start !important;
    gap: 6px !important;
  }
  .hero-preview-tag .ds-badge-gradient {
    font-size: 10px;
  }
  .hero-tag-text {
    font-size: 11px;
    color: #64748b;
  }
  
  .ds-hero-title {
    font-size: 22px !important;
    line-height: 1.18 !important;
    letter-spacing: -0.02em !important;
    text-align: left !important;
    margin: 0 !important;
  }
  
  .ds-hero-desc {
    text-align: left !important;
    font-size: 12.5px !important;
    line-height: 1.5 !important;
    color: #94a3b8 !important;
    max-width: 100% !important;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0 !important;
  }
  
  /* 胶囊按钮组在手机端自适应两列精致排布 */
  .ds-capsule-btn-group {
    display: grid !important;
    grid-template-columns: 1fr 1fr;
    gap: 8px !important;
    width: 100% !important;
    margin-top: 4px !important;
  }
  .ds-capsule-btn {
    padding: 6px 10px !important;
    font-size: 11.5px !important;
    justify-content: center;
    white-space: nowrap;
    border-radius: 20px;
  }
  /* 手机端首屏抽屉隐藏第 5 个按钮，保持 4 个按钮 2x2 完美宫格 */
  .ds-capsule-btn-group a:nth-child(5) {
    display: none;
  }
  
  .story-section {
    padding: 60px 14px;
  }
  
  /* 3. 底部 HUD 遥测条移动端单行极简高雅化 */
  .telemetry-bottom-strip {
    padding: 0 10px !important;
    height: 28px !important;
    font-size: 9.5px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-around !important;
    background: rgba(6, 8, 16, 0.88) !important;
    backdrop-filter: blur(12px) !important;
    overflow: hidden !important;
  }
  .telemetry-item {
    font-size: 9.5px !important;
    gap: 4px !important;
    white-space: nowrap !important;
  }
  /* 手机端隐藏第 4、5 个遥测项（幅宽与时间），保留最关键的在轨状态、530km高度与7.61km/s速度 */
  .telemetry-bottom-strip .telemetry-item:nth-child(n+4) {
    display: none !important;
  }
  
  .explore-mode-bar {
    top: 56px;
    width: 95%;
    padding: 6px 10px;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
  }
  .explore-hint {
    display: none;
  }
}

/* ==========================================================================
   开放地球引擎 OGE 2.0 空间智能遥感工作台 (OGE 2.0 Satellite Workbench)
   ========================================================================== */
.oge-workbench-container {
  width: 100%;
  margin-top: 20px;
  background: rgba(6, 11, 22, 0.94);
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), 0 0 20px rgba(56, 189, 248, 0.12);
  display: flex;
  flex-direction: column;
}

.oge-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-wrap: wrap;
  gap: 10px;
}

.oge-band-tabs {
  display: flex;
  gap: 6px;
  background: rgba(0, 0, 0, 0.4);
  padding: 3px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.oge-tab-btn {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  color: #94a3b8;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.oge-tab-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
}

.oge-tab-btn.active {
  color: #ffffff;
  background: #2563eb;
  box-shadow: 0 0 12px rgba(37, 99, 235, 0.5);
}

.oge-main-viewport {
  display: grid;
  grid-template-columns: 1fr 280px;
  min-height: 280px;
  position: relative;
}

@media (max-width: 860px) {
  .oge-main-viewport {
    grid-template-columns: 1fr;
  }
}

.oge-imagery-display {
  position: relative;
  background: #020617;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 260px;
}

.oge-reticle-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: 
    radial-gradient(circle at center, transparent 40%, rgba(2, 6, 23, 0.6) 100%),
    linear-gradient(rgba(56, 189, 248, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.08) 1px, transparent 1px);
  background-size: 100% 100%, 32px 32px, 32px 32px;
}

.oge-info-sidebar {
  background: rgba(10, 16, 30, 0.85);
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.oge-metric-row {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
}

.oge-metric-lbl {
  color: #94a3b8;
}

.oge-metric-val {
  color: #38bdf8;
  font-weight: 600;
}

/* 四大行业赋能解决方案卡片网格 */
.industry-solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 16px;
  width: 100%;
}

@media (max-width: 768px) {
  .industry-solutions-grid {
    grid-template-columns: 1fr;
  }
}

.solution-card-item {
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 16px 18px;
  transition: all 0.25s ease;
}

.solution-card-item:hover {
  background: rgba(30, 41, 59, 0.85);
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-2px);
}

.solution-title {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.solution-desc {
  font-size: 13px;
  color: #cbd5e1;
  line-height: 1.55;
}

/* ==========================================================================
   3D 地球原生 DOM 高保真全息地标系统 (Screen-Space Holographic Pins)
   ========================================================================== */
.earth-pins-layer {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
  overflow: hidden;
}

.earth-pin {
  position: absolute;
  top: 0;
  left: 0;
  will-change: transform, opacity;
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
  cursor: pointer;
  transform: translate3d(-9999px, -9999px, 0);
  opacity: 0;
}

.earth-pin.visible {
  opacity: 1;
}

/* 武汉主地标 */
.pin-primary {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-left: -50%;
  margin-top: -85px;
}

.pin-anchor {
  position: relative;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 4px;
}

.beacon-dot {
  width: 8px;
  height: 8px;
  background: #facc15;
  border-radius: 50%;
  box-shadow: 0 0 10px #facc15, 0 0 20px #eab308;
  position: relative;
  z-index: 2;
}

.beacon-ring {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1.5px solid #38bdf8;
  animation: pinPulseRing 2.4s cubic-bezier(0.1, 0.4, 0.8, 1) infinite;
}

.beacon-ring.ring-2 {
  animation-delay: 1.2s;
  border-color: #facc15;
}

@keyframes pinPulseRing {
  0% { transform: scale(0.6); opacity: 1; }
  100% { transform: scale(2.8); opacity: 0; }
}

.pin-card {
  position: relative;
  background: rgba(6, 12, 26, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(56, 189, 248, 0.45);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.8), 0 0 20px rgba(56, 189, 248, 0.25);
  border-radius: 10px;
  padding: 8px 14px;
  white-space: nowrap;
  text-align: center;
  transition: all 0.2s ease;
}

.pin-card:hover {
  border-color: #facc15;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.85), 0 0 25px rgba(250, 204, 21, 0.35);
  transform: translateY(-2px);
}

.pin-card-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: #38bdf8;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 2px;
}

.pin-card-title {
  font-size: 13.5px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.pin-card-sub {
  font-size: 11px;
  color: #94a3b8;
  margin-top: 2px;
}

/* 次级地标 (北京、上海、广州等) */
.pin-secondary {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(8, 14, 28, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  padding: 2px 7px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.5);
  white-space: nowrap;
  margin-left: -50%;
  margin-top: -12px;
}

.beacon-dot-sec {
  width: 5px;
  height: 5px;
  background: #38bdf8;
  border-radius: 50%;
  box-shadow: 0 0 6px #38bdf8;
}

.earth-pin.hero-mode .pin-card,
.earth-pin.hero-mode .pin-label {
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
}

@media (max-width: 900px) {
  .pin-secondary .pin-label {
    display: none;
  }
  .pin-secondary {
    background: transparent;
    border: none;
    padding: 0;
    box-shadow: none;
    margin-left: -3px;
    margin-top: -3px;
  }
  .pin-card {
    padding: 6px 10px;
  }
  .pin-card-title {
    font-size: 12px;
  }
  .pin-card-sub {
    display: none;
  }
  .pin-primary {
    margin-top: -65px;
  }
}