/* ===================================================================
   魔法喵 (mofamao.sbs) - 全反射晶体光学设计系统 (Void-Optics Design System)
   核心哲学：Total-Internal-Reflection Optical Prism UI
   色系：深空绝黑 (OLED #000000)、斜面切割石英晶体、光谱紫与光谱翡翠折射光束 (#8b5cf6 -> #10b981)、外科级冷白排版
   纯原生 CSS，零重型第三方库，毫秒级冷启动与 60FPS 丝滑交互
=================================================================== */

/* -------------------- 全局变量与光学设计令牌 -------------------- */
:root {
  /* 光谱折射色谱 (Spectral Laser Beams) */
  --beam-violet: #8b5cf6;
  --beam-indigo: #6366f1;
  --beam-cyan: #06b6d4;
  --beam-emerald: #10b981;
  --beam-pink: #ec4899;
  --beam-white: #ffffff;
  --beam-spectral: linear-gradient(135deg, #8b5cf6 0%, #ec4899 50%, #10b981 100%);
  --beam-violet-emerald: linear-gradient(90deg, #8b5cf6 0%, #10b981 100%);

  /* 默认：白天模式 (高精度光学实验室 / Clinical Quartz Optical Lab) */
  --bg-void: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-glass-prism: rgba(255, 255, 255, 0.82);
  --bg-glass-smoked: rgba(241, 245, 249, 0.7);

  --quartz-border: rgba(15, 23, 42, 0.08);
  --quartz-bevel: rgba(255, 255, 255, 0.95);
  --quartz-highlight: rgba(139, 92, 246, 0.3);
  --quartz-glow: 0 0 25px rgba(139, 92, 246, 0.12);

  --text-surgical-white: #090d16;
  --text-muted: #475569;
  --text-dim: #94a3b8;

  --laser-line: rgba(139, 92, 246, 0.35);
  --laser-emerald-glow: 0 0 20px rgba(16, 185, 129, 0.25);
  --laser-violet-glow: 0 0 20px rgba(139, 92, 246, 0.25);

  --header-bg: rgba(248, 250, 252, 0.85);
  --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
  --card-shadow-hover: 0 16px 36px -4px rgba(139, 92, 246, 0.15);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --max-width: 1240px;
}

/* 夜间模式：深黑全反射暗场 (Pitch OLED Black Void-Optics) */
[data-theme="dark"] {
  --bg-void: #000000;
  --bg-surface: #07090e;
  --bg-surface-elevated: #0d111a;
  --bg-glass-prism: rgba(13, 17, 26, 0.78);
  --bg-glass-smoked: rgba(10, 14, 22, 0.65);

  --quartz-border: rgba(255, 255, 255, 0.1);
  --quartz-bevel: rgba(255, 255, 255, 0.22);
  --quartz-highlight: rgba(139, 92, 246, 0.6);
  --quartz-glow: 0 0 35px rgba(139, 92, 246, 0.25);

  --text-surgical-white: #ffffff;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --laser-line: rgba(139, 92, 246, 0.6);
  --laser-emerald-glow: 0 0 25px rgba(16, 185, 129, 0.5);
  --laser-violet-glow: 0 0 25px rgba(139, 92, 246, 0.5);

  --header-bg: rgba(0, 0, 0, 0.88);
  --card-shadow: 0 4px 25px -2px rgba(0, 0, 0, 0.85);
  --card-shadow-hover: 0 20px 45px -8px rgba(16, 185, 129, 0.2);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px; /* 锚点滚动吸顶偏移 */
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-void);
  color: var(--text-surgical-white);
  line-height: 1.65;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* 光学实验台背景网格 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(to right, var(--quartz-border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--quartz-border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.45;
  pointer-events: none;
  z-index: 0;
}

/* 顶部全反射光谱色散光晕 */
.spectral-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1400px;
  height: 600px;
  background: radial-gradient(circle at 50% 12%, rgba(139, 92, 246, 0.16) 0%, rgba(236, 72, 153, 0.1) 28%, rgba(16, 185, 129, 0.08) 50%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

[data-theme="dark"] .spectral-glow {
  background: radial-gradient(circle at 50% 12%, rgba(139, 92, 246, 0.28) 0%, rgba(236, 72, 153, 0.16) 30%, rgba(16, 185, 129, 0.12) 52%, transparent 75%);
}

a {
  color: inherit;
  text-decoration: none;
}

img, svg {
  display: block;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* -------------------- 顶部页眉导航 Header -------------------- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  background: var(--header-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--quartz-border);
  z-index: 100;
  transition: all var(--transition-smooth);
}

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

/* 品牌 Logo - 魔法喵 (Magical Cat) 萌宠科技标志 */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 850;
  color: var(--text-surgical-white);
  letter-spacing: -0.5px;
}

.prism-logo-gem {
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--quartz-border);
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.25), inset 0 1px 0 var(--quartz-bevel);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.brand-logo:hover .prism-logo-gem {
  transform: translateY(-1px) scale(1.04);
  box-shadow: 0 6px 20px rgba(236, 72, 153, 0.35);
  border-color: var(--beam-pink);
}

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

.brand-name {
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  background: var(--beam-spectral);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-subtext {
  font-size: 0.68rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 600;
}

/* 导航链接 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  padding: 8px 6px;
  position: relative;
  letter-spacing: 0.2px;
}

.nav-link:hover {
  color: var(--text-surgical-white);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--beam-spectral);
  border-radius: 2px;
  transition: width var(--transition-fast);
}

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

.nav-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.35);
  border-radius: var(--radius-full);
  color: var(--beam-violet);
  font-size: 0.88rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.nav-badge-pill:hover {
  background: rgba(139, 92, 246, 0.22);
  border-color: var(--beam-violet);
  box-shadow: 0 0 12px rgba(139, 92, 246, 0.4);
  transform: translateY(-1px);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 昼夜切换按钮 */
.theme-toggle-btn {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--quartz-border);
  box-shadow: inset 0 1px 0 var(--quartz-bevel);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-surgical-white);
  transition: all var(--transition-fast);
  backdrop-filter: blur(8px);
}

.theme-toggle-btn:hover {
  border-color: var(--quartz-highlight);
  box-shadow: var(--quartz-glow);
  transform: translateY(-1px);
}

.theme-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.icon-sun { display: none; }
.icon-moon { display: block; }

[data-theme="dark"] .icon-sun { display: block; color: #f59e0b; }
[data-theme="dark"] .icon-moon { display: none; }

.mobile-toggle-btn {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--quartz-border);
  background: transparent;
  color: var(--text-surgical-white);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* -------------------- 统一按键系统 -------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  white-space: nowrap;
  letter-spacing: 0.2px;
  position: relative;
  overflow: hidden;
}

.btn-prism {
  background: var(--beam-spectral);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-prism:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(16, 185, 129, 0.45);
}

.btn-glass {
  background: var(--bg-surface);
  color: var(--text-surgical-white);
  border: 1px solid var(--quartz-border);
  box-shadow: inset 0 1px 0 var(--quartz-bevel);
}

.btn-glass:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--quartz-highlight);
  box-shadow: var(--quartz-glow);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
  border-radius: 16px;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
  border-radius: 10px;
}

.btn-block {
  width: 100%;
}

/* -------------------- 1. 主视觉区 Hero Area -------------------- */
.hero-section {
  padding: 80px 0 70px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-left-content {
  text-align: left;
}

.hero-mode-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-full);
  font-size: 0.84rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--beam-emerald);
  box-shadow: inset 0 1px 0 var(--quartz-bevel);
}

.laser-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--beam-emerald);
  box-shadow: 0 0 12px var(--beam-emerald);
  animation: laser-pulse 2s infinite;
}

@keyframes laser-pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.4); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-headline {
  font-size: 3.35rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -1.5px;
  margin-bottom: 18px;
  color: var(--text-surgical-white);
}

.hero-headline .brand-highlight {
  background: var(--beam-spectral);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

.hero-subheadline {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--beam-violet);
  margin-bottom: 16px;
  line-height: 1.4;
}

.hero-intro {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 620px;
}

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

.hero-trust-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--quartz-border);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-number {
  font-size: 1.65rem;
  font-weight: 850;
  color: var(--text-surgical-white);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.5px;
}

.metric-number span {
  font-size: 0.95rem;
  color: var(--beam-emerald);
}

.metric-name {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==================== 魔法喵 实时专线加速控制台 (全新替代图2无意义三棱镜) ==================== */
.tunnel-console-container {
  background: var(--bg-surface);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 40px -8px rgba(139, 92, 246, 0.15), inset 0 1px 0 var(--quartz-bevel);
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--transition-smooth);
}

[data-theme="dark"] .tunnel-console-container {
  box-shadow: 0 16px 50px -10px rgba(0, 0, 0, 0.9), 0 0 35px rgba(139, 92, 246, 0.2);
}

/* 控制台顶部状态栏 */
.console-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--bg-surface-elevated);
  border-bottom: 1px solid var(--quartz-border);
  font-size: 0.84rem;
}

.console-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cat-signal-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--beam-emerald);
  box-shadow: 0 0 10px var(--beam-emerald);
  animation: laser-pulse 2s infinite;
}

.console-title {
  font-weight: 800;
  color: var(--text-surgical-white);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.console-badge {
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.12);
  color: var(--beam-emerald);
  font-size: 0.75rem;
  font-weight: 700;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.console-status-text {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 0.78rem;
  font-family: ui-monospace, SFMono-Regular, monospace;
}

.console-status-text .divider {
  opacity: 0.4;
}

.status-online {
  color: var(--beam-emerald);
  font-weight: 700;
}

/* 场景模式快捷切换器 */
.scene-mode-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 14px 18px 10px;
  background: var(--bg-surface);
}

.scene-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 10px 8px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-muted);
  text-align: center;
}

.scene-tab:hover {
  border-color: var(--quartz-highlight);
  color: var(--text-surgical-white);
  transform: translateY(-1px);
}

.scene-tab.active {
  background: rgba(139, 92, 246, 0.12);
  border-color: var(--beam-violet);
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.25);
  color: var(--text-surgical-white);
}

.scene-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.scene-name {
  font-size: 0.85rem;
  font-weight: 800;
}

.scene-sub {
  font-size: 0.68rem;
  color: var(--text-dim);
}

/* 全球专线光速穿透网络拓扑 (Network Transit Visualizer) */
.network-topology-view {
  padding: 14px 18px;
  background: var(--bg-surface);
}

.topology-stage {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 16px;
  background: radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.08) 0%, var(--bg-surface-elevated) 100%);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
}

.topo-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
  min-width: 90px;
}

.topo-node .node-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--bg-surface);
  border: 1px solid var(--quartz-border);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  transition: all var(--transition-fast);
}

.target-node .node-icon {
  border-color: var(--beam-emerald);
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.35);
  animation: glow-pulse 2.5s infinite;
}

@keyframes glow-pulse {
  0% { box-shadow: 0 0 8px rgba(16, 185, 129, 0.2); }
  50% { box-shadow: 0 0 18px rgba(16, 185, 129, 0.5); }
  100% { box-shadow: 0 0 8px rgba(16, 185, 129, 0.2); }
}

.node-label {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-surgical-white);
}

.node-meta {
  font-size: 0.72rem;
  color: var(--beam-emerald);
  font-weight: 600;
}

/* 专线光纤传输轨道 */
.topo-tunnel-path {
  flex-grow: 1;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.tunnel-line-track {
  width: 100%;
  height: 4px;
  background: rgba(139, 92, 246, 0.2);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}

.tunnel-pulse-beam {
  position: absolute;
  top: 0;
  left: -40%;
  width: 40%;
  height: 100%;
  background: linear-gradient(90deg, transparent, #10b981, #ffffff, #8b5cf6, transparent);
  animation: beam-flow 1.8s linear infinite;
}

@keyframes beam-flow {
  0% { left: -40%; }
  100% { left: 100%; }
}

.packet-dots {
  display: flex;
  justify-content: space-between;
  width: 80%;
}

.p-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--beam-emerald);
  opacity: 0.6;
}

.tunnel-stats-tag {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.speed-badge, .crypto-badge {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 3px;
  background: rgba(0, 0, 0, 0.2);
  color: var(--text-dim);
}

[data-theme="light"] .speed-badge, [data-theme="light"] .crypto-badge {
  background: rgba(0, 0, 0, 0.05);
}

.speed-badge {
  color: var(--beam-emerald);
}

/* 实时带宽吞吐波形监视器 */
.throughput-monitor-wrap {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
}

.monitor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, monospace;
}

.monitor-title {
  color: var(--text-dim);
}

.monitor-speed {
  font-weight: 850;
  color: var(--beam-emerald);
  font-size: 0.95rem;
  letter-spacing: 0.5px;
}

#speedWaveCanvas {
  width: 100%;
  height: 60px;
  display: block;
}

/* 4个核心节点实时遥测卡片 */
.telemetry-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  padding: 0 18px 18px;
}

.tele-item {
  padding: 12px 14px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.tele-item:hover, .tele-item.highlighted {
  border-color: var(--beam-emerald);
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.25);
  transform: translateY(-2px);
}

.tele-top {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 750;
  color: var(--text-surgical-white);
}

.tele-city {
  flex-grow: 1;
}

.tele-badge {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 3px;
}

.badge-fast {
  background: rgba(16, 185, 129, 0.12);
  color: var(--beam-emerald);
}

.badge-ai {
  background: rgba(139, 92, 246, 0.12);
  color: var(--beam-violet);
}

.tele-bottom {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.tele-ping {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--beam-emerald);
  font-family: ui-monospace, SFMono-Regular, monospace;
}

.tele-ping small {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-dim);
}

.tele-detail {
  font-size: 0.72rem;
  color: var(--text-dim);
  font-family: ui-monospace, SFMono-Regular, monospace;
}

/* -------------------- 共通 Section 规范 -------------------- */
.section {
  padding: 96px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-surface-elevated);
  transition: background-color var(--transition-smooth);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--beam-violet);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 850;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--text-surgical-white);
  letter-spacing: -0.8px;
}

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

/* -------------------- 2. 核心优势介绍 (3个斜切晶体卡片) -------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-quartz-card {
  background: var(--bg-surface);
  border: 1px solid var(--quartz-border);
  box-shadow: var(--card-shadow), inset 0 1px 0 var(--quartz-bevel);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
}

.feature-quartz-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--beam-spectral);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.feature-quartz-card:hover {
  transform: translateY(-8px);
  border-color: var(--quartz-highlight);
  box-shadow: var(--card-shadow-hover);
}

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

.feature-gem-icon {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--beam-violet);
  margin-bottom: 24px;
}

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

.feature-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-surgical-white);
  margin-bottom: 14px;
}

.feature-text {
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.feature-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: auto;
}

.feature-bullet {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-surgical-white);
}

.feature-bullet svg {
  width: 16px;
  height: 16px;
  color: var(--beam-emerald);
  flex-shrink: 0;
}

/* -------------------- 3. 流媒体 & AI 双专区图卡 -------------------- */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.ecosystem-card {
  background: var(--bg-surface);
  border: 1px solid var(--quartz-border);
  box-shadow: var(--card-shadow), inset 0 1px 0 var(--quartz-bevel);
  border-radius: var(--radius-lg);
  padding: 44px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
}

.ecosystem-card:hover {
  transform: translateY(-6px);
  border-color: var(--quartz-highlight);
  box-shadow: var(--card-shadow-hover);
}

.eco-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 750;
  margin-bottom: 20px;
}

.pill-stream {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.pill-ai {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.eco-title {
  font-size: 1.75rem;
  font-weight: 850;
  margin-bottom: 14px;
  color: var(--text-surgical-white);
}

.eco-desc {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 28px;
}

.matrix-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.matrix-chip {
  padding: 8px 16px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-surgical-white);
  transition: all var(--transition-fast);
}

.matrix-chip:hover {
  border-color: var(--beam-emerald);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
  transform: translateY(-1px);
}

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

.eco-spec-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-surgical-white);
}

.eco-spec-item svg {
  width: 18px;
  height: 18px;
  color: var(--beam-emerald);
  flex-shrink: 0;
  margin-top: 2px;
}

/* -------------------- 4. 套餐价格对比表 -------------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-plan-card {
  background: var(--bg-surface);
  border: 1px solid var(--quartz-border);
  box-shadow: var(--card-shadow), inset 0 1px 0 var(--quartz-bevel);
  border-radius: var(--radius-lg);
  padding: 44px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-smooth);
}

.pricing-plan-card:hover {
  transform: translateY(-8px);
  border-color: var(--beam-emerald);
  box-shadow: 0 20px 45px -8px rgba(16, 185, 129, 0.35);
}

.pricing-plan-card.featured {
  border: 2px solid var(--beam-violet);
  box-shadow: 0 16px 40px -4px rgba(139, 92, 246, 0.3);
  transform: scale(1.02);
}

.pricing-plan-card.featured:hover {
  transform: scale(1.02) translateY(-8px);
  border-color: var(--beam-emerald);
}

.tier-ribbon {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--beam-spectral);
  color: #ffffff;
  padding: 5px 20px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.5);
  white-space: nowrap;
}

.plan-tier-title {
  font-size: 1.45rem;
  font-weight: 850;
  color: var(--text-surgical-white);
  margin-bottom: 8px;
}

.plan-tier-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
  min-height: 42px;
  margin-bottom: 24px;
}

.price-box {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 12px;
}

.price-currency {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-surgical-white);
}

.price-amount {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-surgical-white);
  letter-spacing: -1.5px;
  font-variant-numeric: tabular-nums;
}

.price-period {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.discount-tag {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--beam-emerald);
  background: rgba(16, 185, 129, 0.1);
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 700;
  margin-bottom: 24px;
}

.tier-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-bottom: 36px;
  flex-grow: 1;
}

.tier-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--text-surgical-white);
}

.tier-feature-item svg {
  width: 18px;
  height: 18px;
  color: var(--beam-emerald);
  flex-shrink: 0;
}

/* -------------------- 5. 用户真实口碑 -------------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.testimonial-card {
  background: var(--bg-surface);
  border: 1px solid var(--quartz-border);
  box-shadow: var(--card-shadow), inset 0 1px 0 var(--quartz-bevel);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
}

.testimonial-card:hover {
  transform: translateY(-6px);
  border-color: var(--quartz-highlight);
  box-shadow: var(--card-shadow-hover);
}

.star-rating {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 18px;
}

.star-rating svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.testimonial-quote {
  font-size: 0.96rem;
  color: var(--text-surgical-white);
  line-height: 1.7;
  margin-bottom: 26px;
  flex-grow: 1;
}

.author-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--quartz-border);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--beam-spectral);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.05rem;
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-size: 0.96rem;
  font-weight: 750;
  color: var(--text-surgical-white);
}

.author-title {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* -------------------- 6. 常见问题 (FAQ) -------------------- */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-card {
  background: var(--bg-surface);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-card:hover {
  border-color: var(--quartz-highlight);
}

.faq-btn {
  width: 100%;
  padding: 22px 26px;
  background: transparent;
  border: none;
  text-align: left;
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--text-surgical-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: inherit;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--beam-violet);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.faq-card.active .faq-icon {
  transform: rotate(180deg);
  color: var(--beam-emerald);
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.faq-card.active .faq-content {
  max-height: 400px;
}

.faq-text {
  padding: 0 26px 24px;
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* -------------------- 底部行动号召 -------------------- */
.cta-banner-section {
  padding: 70px 0;
}

.prism-cta-box {
  background: var(--bg-surface);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-lg);
  padding: 64px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow-hover);
}

.prism-cta-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 0%, rgba(139, 92, 246, 0.22) 0%, rgba(16, 185, 129, 0.12) 40%, transparent 80%);
  pointer-events: none;
}

.cta-title {
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.8px;
  color: var(--text-surgical-white);
}

.cta-desc {
  font-size: 1.12rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 36px;
}

/* -------------------- 7. 页脚规范 (只保留4个标题) -------------------- */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--quartz-border);
  padding: 50px 0 38px;
  transition: all var(--transition-smooth);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  text-align: center;
}

.footer-nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav-item a {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-surgical-white);
  transition: color var(--transition-fast);
  padding: 6px 4px;
}

.footer-nav-item a:hover {
  color: var(--beam-violet);
}

.footer-bottom-copy {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* -------------------- 资讯页面专有样式 -------------------- */
.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin: 50px 0;
}

.article-card {
  background: var(--bg-surface);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
  position: relative;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--quartz-highlight);
  box-shadow: var(--card-shadow-hover);
}

.article-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 750;
  text-transform: uppercase;
  color: var(--beam-emerald);
  margin-bottom: 12px;
}

.article-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-surgical-white);
  line-height: 1.4;
}

.article-title a {
  color: inherit;
  transition: color var(--transition-fast);
}

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

.article-excerpt {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--quartz-border);
  padding-top: 16px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* -------------------- 文章排版与结构 -------------------- */
.breadcrumb-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumb-bar a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.breadcrumb-bar a:hover {
  color: var(--beam-violet);
}

.breadcrumb-separator {
  color: var(--text-dim);
}

.article-post-header {
  margin-bottom: 40px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--quartz-border);
}

.article-post-title {
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 18px;
  color: var(--text-surgical-white);
  letter-spacing: -0.8px;
}

.article-meta-info {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-dim);
  flex-wrap: wrap;
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.toc-box {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--quartz-border);
  box-shadow: inset 0 1px 0 var(--quartz-bevel);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
}

.toc-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-surgical-white);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-list li {
  font-size: 0.94rem;
  line-height: 1.5;
}

.toc-list a {
  color: var(--text-muted);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.toc-list a:hover {
  color: var(--beam-violet);
  padding-left: 4px;
}

.toc-list a::before {
  content: "§";
  color: var(--beam-emerald);
  font-size: 0.85rem;
}

.article-body-content {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.85;
}

.article-body-content p {
  margin-bottom: 22px;
}

.article-body-content h2 {
  font-size: 1.75rem;
  font-weight: 850;
  color: var(--text-surgical-white);
  margin: 48px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--quartz-border);
  position: relative;
}

.article-body-content h2::before {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 50px;
  height: 2px;
  background: var(--beam-spectral);
}

.article-body-content h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-surgical-white);
  margin: 32px 0 14px;
}

.article-body-content ul, .article-body-content ol {
  margin: 0 0 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-body-content li {
  line-height: 1.75;
}

.article-body-content strong {
  color: var(--text-surgical-white);
  font-weight: 750;
}

.callout-box {
  background: rgba(139, 92, 246, 0.08);
  border-left: 4px solid var(--beam-violet);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 20px 24px;
  margin: 28px 0;
  font-size: 0.98rem;
  color: var(--text-surgical-white);
}

.tech-table-wrap {
  overflow-x: auto;
  margin: 32px 0;
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-md);
}

.tech-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

.tech-table th {
  background: var(--bg-surface-elevated);
  padding: 16px 20px;
  color: var(--text-surgical-white);
  font-weight: 750;
  border-bottom: 1px solid var(--quartz-border);
  white-space: nowrap;
}

.tech-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--quartz-border);
  color: var(--text-muted);
}

.tech-table tr:last-child td {
  border-bottom: none;
}

.tech-table tr:hover td {
  background: rgba(139, 92, 246, 0.04);
}

.article-faq-section {
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--quartz-border);
}

.article-faq-title {
  font-size: 1.75rem;
  font-weight: 850;
  color: var(--text-surgical-white);
  margin-bottom: 24px;
}

.article-faq-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.article-faq-item {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.article-faq-q {
  font-size: 1.1rem;
  font-weight: 750;
  color: var(--text-surgical-white);
  margin-bottom: 10px;
}

.article-faq-a {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.related-reading-section {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--quartz-border);
}

.related-reading-title {
  font-size: 1.6rem;
  font-weight: 850;
  color: var(--text-surgical-white);
  margin-bottom: 24px;
}

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

.related-card {
  padding: 20px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-card:hover {
  border-color: var(--beam-emerald);
  box-shadow: var(--laser-emerald-glow);
  transform: translateY(-2px);
}

.related-card-tag {
  font-size: 0.75rem;
  color: var(--beam-emerald);
  font-weight: 700;
}

.related-card-title {
  font-size: 1.05rem;
  font-weight: 750;
  color: var(--text-surgical-white);
  line-height: 1.4;
}

/* -------------------- 响应式适配媒体查询 (@media) -------------------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .hero-left-content {
    text-align: center;
  }

  .hero-intro {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-row {
    justify-content: center;
  }

  .hero-trust-metrics {
    max-width: 600px;
    margin: 0 auto;
  }

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

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }

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

  .pricing-plan-card.featured:hover {
    transform: translateY(-8px);
  }

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

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

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

@media (max-width: 768px) {
  .header-inner {
    height: 66px;
  }

  .mobile-toggle-btn {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 66px;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--quartz-border);
    box-shadow: var(--card-shadow);
  }

  .nav-menu.open {
    display: flex;
  }

  .hero-section {
    padding: 48px 0 40px;
  }

  .hero-headline {
    font-size: 2.25rem;
    letter-spacing: -0.8px;
  }

  .hero-subheadline {
    font-size: 1.15rem;
  }

  .hero-cta-row {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-row .btn {
    width: 100%;
    min-height: 52px;
  }

  .hero-trust-metrics {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .ecosystem-card {
    padding: 28px;
  }

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

  .cta-title {
    font-size: 1.85rem;
  }

  .prism-cta-box {
    padding: 40px 20px;
  }

  .footer-nav-list {
    gap: 20px;
  }

  .article-post-title {
    font-size: 1.85rem;
  }

  .scene-mode-selector {
    grid-template-columns: 1fr;
  }

  .topology-stage {
    flex-direction: column;
    gap: 16px;
  }

  .topo-tunnel-path {
    width: 100%;
    padding: 8px 0;
  }

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

@media (max-width: 480px) {
  .hero-headline {
    font-size: 1.95rem;
  }

  .footer-nav-list {
    flex-direction: column;
    gap: 14px;
  }
}