/* ==========================================================================
   CYBER DUCK / 机械控制台 - 全局核心样式
   配色规范:
   - 背景黑: #101214
   - 赛博黄: #FFE500
   - 激光青: #00E6F0
   - 警示红: #FF0050
   ========================================================================== */

:root {
  --bg-primary: #101214;
  --bg-secondary: #16191d;
  --bg-tertiary: #1c2127;
  --bg-card: rgba(22, 25, 29, 0.85);
  --bg-card-hover: rgba(28, 33, 39, 0.95);
  
  --color-yellow: #FFE500;
  --color-cyan: #00E6F0;
  --color-red: #FF0050;
  
  --text-main: #EDEDED;
  --text-muted: #9BA8B5;
  --text-dim: #606C78;
  --text-dark: #101214;
  
  --border-cyan: rgba(0, 230, 240, 0.25);
  --border-cyan-bright: #00E6F0;
  --border-yellow: rgba(255, 229, 0, 0.4);
  --border-yellow-bright: #FFE500;
  --border-dark: #242b33;

  --font-mono: "JetBrains Mono", "Fira Code", "Roboto Mono", Consolas, "SF Mono", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --chamfer-sm: 8px;
  --chamfer-md: 14px;
  --chamfer-lg: 22px;
  
  --shadow-cyan-glow: 0 0 15px rgba(0, 230, 240, 0.25);
  --shadow-yellow-glow: 0 0 15px rgba(255, 229, 0, 0.3);
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background-color: var(--bg-primary);
  background-image: 
    linear-gradient(rgba(0, 230, 240, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 230, 240, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: center top;
}

/* 跳过导航链接 (可访问性) */
.skip-link {
  position: absolute;
  top: -999px;
  left: 20px;
  background: var(--color-yellow);
  color: var(--text-dark);
  padding: 10px 18px;
  font-weight: 700;
  font-family: var(--font-mono);
  z-index: 10000;
  text-decoration: none;
  border: 2px solid var(--text-dark);
}
.skip-link:focus {
  top: 20px;
}

/* 焦点可见性 */
:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 3px;
}

/* 容器定义 */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 赛博切角工具类 */
.cyber-chamfer {
  clip-path: polygon(
    0 0,
    calc(100% - var(--chamfer-md)) 0,
    100% var(--chamfer-md),
    100% 100%,
    var(--chamfer-md) 100%,
    0 calc(100% - var(--chamfer-md))
  );
}

.cyber-chamfer-yellow {
  border: 1px solid var(--border-yellow);
  position: relative;
  background: var(--bg-card);
}
.cyber-chamfer-yellow::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 14px;
  height: 2px;
  background: var(--color-yellow);
  transform: rotate(45deg);
  transform-origin: top right;
}

.cyber-chamfer-cyan {
  border: 1px solid var(--border-cyan);
  position: relative;
  background: var(--bg-card);
}

/* 按钮通用 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  border: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-yellow);
  color: var(--text-dark);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}
.btn-primary:hover {
  background: #fff033;
  box-shadow: var(--shadow-yellow-glow);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-cyan);
  border: 1px solid var(--color-cyan);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}
.btn-secondary:hover {
  background: rgba(0, 230, 240, 0.12);
  box-shadow: var(--shadow-cyan-glow);
  transform: translateY(-2px);
}

.btn-outline {
  background: rgba(22, 25, 29, 0.8);
  color: var(--text-main);
  border: 1px solid var(--border-cyan);
  font-size: 0.85rem;
  padding: 8px 16px;
}
.btn-outline:hover {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
}

/* 控制按钮 (动效切换) */
.btn-toggle-motion {
  background: transparent;
  border: 1px dashed var(--border-cyan);
  color: var(--color-cyan);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 6px 12px;
  cursor: pointer;
  border-radius: 2px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}
.btn-toggle-motion:hover {
  background: rgba(0, 230, 240, 0.1);
  border-style: solid;
}

/* 徽章 / 铭牌标签 */
.tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 3px 8px;
  background: rgba(0, 230, 240, 0.08);
  border: 1px solid var(--border-cyan);
  color: var(--color-cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.tag-badge.yellow {
  background: rgba(255, 229, 0, 0.1);
  border-color: var(--border-yellow);
  color: var(--color-yellow);
}
.tag-badge.red {
  background: rgba(255, 0, 80, 0.1);
  border-color: rgba(255, 0, 80, 0.4);
  color: var(--color-red);
}

/* 视觉示意标注 */
.demo-disclaimer-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  border-left: 2px solid var(--color-yellow);
  padding-left: 8px;
  margin-top: 6px;
}

/* ==========================================================================
   Header 导航 (工程铭牌样式)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(16, 18, 20, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-cyan);
}
.header-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  padding: 4px 20px;
  border-bottom: 1px dashed rgba(0, 230, 240, 0.15);
  background: rgba(12, 14, 16, 0.8);
}
.header-topbar-item {
  display: flex;
  align-items: center;
  gap: 8px;
}
.status-indicator-dot {
  width: 6px;
  height: 6px;
  background-color: var(--color-cyan);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 6px var(--color-cyan);
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  gap: 16px;
}

/* Logo 铭牌 */
.brand-nameplate {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}
.brand-logo-icon {
  width: 38px;
  height: 38px;
  background: #16191d;
  border: 1.5px solid var(--color-yellow);
  display: flex;
  align-items: center;
  justify-content: center;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
  position: relative;
}
.brand-logo-icon svg {
  width: 24px;
  height: 24px;
}
.brand-info {
  display: flex;
  flex-direction: column;
}
.brand-title {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--color-yellow);
  letter-spacing: 0.05em;
  line-height: 1.1;
}
.brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--color-cyan);
  letter-spacing: 0.12em;
}

/* 导航链接 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}
.nav-link {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 10px;
  position: relative;
  transition: color var(--transition-fast);
}
.nav-link:hover, .nav-link.active {
  color: var(--color-yellow);
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 10px;
  right: 10px;
  height: 2px;
  background: var(--color-yellow);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}
.nav-link:hover::after {
  transform: scaleX(1);
}

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

/* 移动端汉堡按钮 */
.burger-btn {
  display: none;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-cyan);
  color: var(--color-cyan);
  width: 42px;
  height: 42px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}
.burger-icon {
  width: 20px;
  height: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.burger-line {
  width: 100%;
  height: 2px;
  background: var(--color-cyan);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.burger-btn[aria-expanded="true"] .burger-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.burger-btn[aria-expanded="true"] .burger-line:nth-child(2) {
  opacity: 0;
}
.burger-btn[aria-expanded="true"] .burger-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ==========================================================================
   Hero 主屏 (赛博机械鸭原创构图)
   上方居中大标题，下方左侧终端摘要、右侧大型矢量机械鸭
   ========================================================================== */
.hero-section {
  padding: 48px 0 64px;
  position: relative;
  border-bottom: 1px solid var(--border-cyan);
  background: radial-gradient(circle at 75% 40%, rgba(0, 230, 240, 0.05) 0%, transparent 60%);
}

.hero-header {
  text-align: center;
  max-width: 960px;
  margin: 0 auto 40px;
}
.hero-pretitle {
  margin-bottom: 14px;
}
.hero-title {
  font-size: 2.8rem;
  font-weight: 900;
  color: #FFFFFF;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  text-shadow: 0 0 20px rgba(0, 230, 240, 0.2);
}
.hero-title .brand-highlight {
  color: var(--color-yellow);
  display: inline-block;
  position: relative;
}
.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 28px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Hero 分割区域: 终端与机械鸭 */
.hero-workspace-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin-top: 24px;
}

/* 左侧终端摘要模块 */
.hero-terminal-card {
  background: #14171a;
  border: 1px solid var(--border-cyan);
  border-radius: 4px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  position: relative;
  overflow: hidden;
}
.terminal-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #0d0f11;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border-cyan);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-cyan);
}
.terminal-controls {
  display: flex;
  gap: 6px;
}
.term-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.term-dot.red { background: #FF0050; }
.term-dot.yellow { background: #FFE500; }
.term-dot.green { background: #00E6F0; }

.terminal-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-main);
  line-height: 1.7;
  max-height: 380px;
  overflow-y: auto;
}
.term-line {
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  overflow-wrap: anywhere;
}
.term-prompt {
  color: var(--color-cyan);
  font-weight: 700;
  flex-shrink: 0;
}
.term-highlight {
  color: var(--color-yellow);
}
.term-dim {
  color: var(--text-dim);
}
.terminal-action-bar {
  padding: 12px 20px;
  background: rgba(13, 15, 17, 0.7);
  border-top: 1px dashed rgba(0, 230, 240, 0.2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.terminal-output-toast {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-yellow);
  min-height: 24px;
  display: flex;
  align-items: center;
}

/* 右侧大型机械鸭容器 */
.hero-duck-stage {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  background: radial-gradient(circle, rgba(0, 230, 240, 0.08) 0%, rgba(16, 18, 20, 0) 70%);
}
.duck-svg-wrapper {
  width: 100%;
  max-width: 480px;
  position: relative;
  filter: drop-shadow(0 0 25px rgba(0, 230, 240, 0.15));
}

/* 机械鸭专属动效定义 */
/* 鸭眼轻微呼吸 */
@keyframes duckEyeBreathe {
  0%, 100% {
    opacity: 0.45;
    filter: drop-shadow(0 0 2px var(--color-cyan));
  }
  50% {
    opacity: 1;
    filter: drop-shadow(0 0 8px var(--color-cyan));
  }
}
.duck-eye-glow {
  animation: duckEyeBreathe 3s ease-in-out infinite;
}

/* 头部低对比度扫描线 */
@keyframes duckScanline {
  0% {
    transform: translateY(-20px);
    opacity: 0;
  }
  20% {
    opacity: 0.35;
  }
  80% {
    opacity: 0.35;
  }
  100% {
    transform: translateY(140px);
    opacity: 0;
  }
}
.duck-scanline-beam {
  animation: duckScanline 4s linear infinite;
}

/* 身体内部缓慢转动的虚线环 */
@keyframes duckCoreRotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
@keyframes duckCoreRotateReverse {
  0% {
    transform: rotate(360deg);
  }
  100% {
    transform: rotate(0deg);
  }
}
.duck-ring-outer {
  transform-origin: 240px 300px;
  animation: duckCoreRotate 24s linear infinite;
}
.duck-ring-inner {
  transform-origin: 240px 300px;
  animation: duckCoreRotateReverse 16s linear infinite;
}

/* 暂停动效全局控制 */
body.motion-paused .cyber-anim,
body.motion-paused .duck-eye-glow,
body.motion-paused .duck-scanline-beam,
body.motion-paused .duck-ring-outer,
body.motion-paused .duck-ring-inner {
  animation-play-state: paused !important;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .duck-eye-glow,
  .duck-scanline-beam,
  .duck-ring-outer,
  .duck-ring-inner,
  .cyber-anim {
    animation: none !important;
  }
}

/* ==========================================================================
   左下状态小窗 (必须能关闭，移动端回归文档流)
   ========================================================================== */
.telemetry-status-dock {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 900;
  width: 320px;
  background: rgba(16, 18, 20, 0.95);
  border: 1px solid var(--border-cyan);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.7);
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  backdrop-filter: blur(8px);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}
.telemetry-status-dock.hidden {
  display: none !important;
}
.telemetry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  border-bottom: 1px dashed rgba(0, 230, 240, 0.2);
  padding-bottom: 6px;
  color: var(--color-cyan);
}
.telemetry-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
}
.telemetry-close-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 2px 6px;
  font-size: 1rem;
  line-height: 1;
}
.telemetry-close-btn:hover {
  color: var(--color-red);
}
.telemetry-content {
  color: var(--text-muted);
  line-height: 1.5;
}
.telemetry-indicator-bar {
  height: 3px;
  background: #242b33;
  margin-top: 8px;
  position: relative;
  overflow: hidden;
}
.telemetry-bar-fill {
  height: 100%;
  width: 100%;
  background: var(--color-cyan);
}

/* ==========================================================================
   Section 通用标题与排版
   ========================================================================== */
.section-wrapper {
  padding: 72px 0;
  border-bottom: 1px solid var(--border-dark);
  position: relative;
}
.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 48px;
}
.section-meta-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-cyan);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 10px;
}
.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   1. 购买步骤 (选择服务 → 完成支付 → 按官方指引配置)
   ========================================================================== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}
.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  padding: 28px 24px;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}
.step-number {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 900;
  color: rgba(0, 230, 240, 0.2);
  line-height: 1;
  margin-bottom: 12px;
}
.step-title {
  font-size: 1.25rem;
  color: var(--color-yellow);
  margin-bottom: 10px;
  font-weight: 700;
}
.step-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}
.step-disclaimer-note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ==========================================================================
   2. 核心优势 (两宽一窄的不对称仪表模块)
   ========================================================================== */
.advantages-asymmetric-grid {
  display: grid;
  grid-template-columns: 1.2fr 1.2fr 0.8fr;
  gap: 24px;
}
.adv-gauge-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  padding: 30px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.adv-gauge-card.wide {
  border-top: 2px solid var(--color-yellow);
}
.adv-gauge-card.narrow {
  border-top: 2px solid var(--color-cyan);
}
.adv-icon-wrap {
  width: 48px;
  height: 48px;
  background: rgba(0, 230, 240, 0.08);
  border: 1px solid var(--border-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-cyan);
  margin-bottom: 20px;
}
.adv-card-title {
  font-size: 1.35rem;
  color: #FFFFFF;
  margin-bottom: 12px;
  font-weight: 700;
}
.adv-card-text {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 20px;
}
.adv-visual-gauge {
  background: #111417;
  border: 1px solid rgba(0, 230, 240, 0.15);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.gauge-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  color: var(--text-dim);
}
.gauge-row span:last-child {
  color: var(--color-cyan);
}

/* ==========================================================================
   3. 全球节点/网络能力 (路由线路板风格)
   ========================================================================== */
.circuit-board-wrapper {
  background: #121519;
  border: 1px solid var(--border-cyan);
  padding: 36px 30px;
  position: relative;
  overflow: hidden;
}
.circuit-board-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  border-bottom: 1px solid rgba(0, 230, 240, 0.2);
  padding-bottom: 12px;
  flex-wrap: wrap;
  gap: 12px;
}
.circuit-svg-topology {
  width: 100%;
  max-width: 1000px;
  height: auto;
  margin: 0 auto 30px;
  display: block;
}

.node-chips-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 30px;
}
.node-chip-item {
  background: #161a1f;
  border: 1px solid var(--border-cyan);
  padding: 16px;
  position: relative;
  font-family: var(--font-mono);
}
.node-code {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-yellow);
  margin-bottom: 4px;
}
.node-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.node-tech-tag {
  font-size: 0.7rem;
  color: var(--color-cyan);
  margin-top: 8px;
  display: block;
}

.node-strategy-box {
  background: rgba(22, 26, 31, 0.7);
  border-left: 3px solid var(--color-yellow);
  padding: 18px 24px;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   4. AI 与流媒体 (两条功能总线)
   ========================================================================== */
.buses-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.function-bus-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  padding: 32px 28px;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}
.function-bus-card.ai-bus {
  border-left: 3px solid var(--color-cyan);
}
.function-bus-card.media-bus {
  border-left: 3px solid var(--color-yellow);
}
.bus-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.bus-title {
  font-size: 1.45rem;
  color: #FFFFFF;
  font-weight: 700;
}
.bus-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.6;
}
.bus-app-tokens {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.app-token {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 5px 10px;
  background: #181d22;
  border: 1px solid var(--border-dark);
  color: var(--text-main);
  border-radius: 2px;
}
.bus-guidelines-list {
  list-style: none;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
}
.bus-guidelines-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
}
.bus-guidelines-list li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--color-cyan);
}
.bus-disclaimer-note {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   5. 套餐价格 (三种芯片槽风格)
   ========================================================================== */
.pricing-chips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.pricing-chip-slot {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}
.pricing-chip-slot:hover {
  transform: translateY(-4px);
  border-color: var(--color-cyan);
}
.pricing-chip-slot.featured {
  border-color: var(--color-yellow);
  background: rgba(26, 30, 36, 0.95);
  box-shadow: 0 0 20px rgba(255, 229, 0, 0.1);
}
.chip-slot-badge {
  position: absolute;
  top: -12px;
  left: 24px;
  background: var(--color-yellow);
  color: var(--text-dark);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 10px;
  text-transform: uppercase;
}
.chip-name {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: #FFFFFF;
  margin-bottom: 8px;
}
.chip-price-box {
  margin: 18px 0;
  padding-bottom: 18px;
  border-bottom: 1px dashed var(--border-dark);
}
.chip-price {
  font-size: 2rem;
  font-family: var(--font-mono);
  font-weight: 900;
  color: var(--color-yellow);
}
.chip-price-note {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 4px;
}

.chip-specs-list {
  list-style: none;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 30px;
}
.chip-spec-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.chip-spec-label {
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}
.chip-spec-val {
  color: var(--text-main);
  font-weight: 600;
}

/* ==========================================================================
   6. SEO 技术档案列表 (3x3 图卡)
   ========================================================================== */
.articles-dossier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.dossier-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  position: relative;
}
.dossier-card:hover {
  border-color: var(--color-cyan);
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
}
.dossier-cover {
  width: 100%;
  height: 180px;
  background: #14181d;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-bottom: 1px solid var(--border-dark);
  overflow: hidden;
}
.dossier-cover svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal), filter var(--transition-normal);
}
.dossier-card:hover .dossier-cover svg {
  transform: scale(1.02);
  filter: drop-shadow(0 0 12px rgba(0, 230, 240, 0.3));
}
.dossier-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.dossier-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-bottom: 10px;
}
.dossier-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.4;
  margin-bottom: 10px;
  transition: color var(--transition-fast);
}
.dossier-card:hover .dossier-title {
  color: var(--color-yellow);
}
.dossier-excerpt {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.dossier-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-cyan);
  padding-top: 12px;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   7. 用户评价 (通信记录风格)
   ========================================================================== */
.reviews-comm-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.comm-record-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  padding: 24px;
  font-family: var(--font-mono);
  position: relative;
}
.comm-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--color-cyan);
  border-bottom: 1px dashed rgba(0, 230, 240, 0.2);
  padding-bottom: 8px;
  margin-bottom: 12px;
}
.comm-user {
  font-weight: 700;
  color: var(--color-yellow);
}
.comm-body {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 14px;
}
.comm-footer {
  font-size: 0.72rem;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
}

/* ==========================================================================
   8. FAQ (终端问答细节展开)
   ========================================================================== */
.faq-accordion-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  transition: border-color var(--transition-fast);
}
.faq-item[open] {
  border-color: var(--border-cyan);
}
.faq-summary {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  font-size: 1.05rem;
  font-weight: 700;
  color: #FFFFFF;
  user-select: none;
}
.faq-summary::-webkit-details-marker {
  display: none;
}
.faq-indicator {
  font-family: var(--font-mono);
  color: var(--color-cyan);
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
}
.faq-item[open] .faq-indicator {
  transform: rotate(45deg);
  color: var(--color-yellow);
}
.faq-content {
  padding: 0 24px 20px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px dashed rgba(255, 255, 255, 0.06);
  padding-top: 14px;
}

/* ==========================================================================
   Footer 页脚
   ========================================================================== */
.site-footer {
  background: #0d0f12;
  border-top: 1px solid var(--border-cyan);
  padding: 60px 0 30px;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand-desc {
  margin-top: 14px;
  line-height: 1.7;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-yellow);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  font-size: 0.88rem;
}
.footer-link:hover {
  color: var(--color-cyan);
}
.footer-link.subtle-ext {
  color: #7d8c99;
}
.footer-link.subtle-ext:hover {
  color: var(--color-yellow);
}

.footer-bottom-bar {
  border-top: 1px solid var(--border-dark);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   文章详情页与独立页面专用样式 (Article & Subpages)
   ========================================================================== */
.subpage-hero {
  padding: 48px 0 36px;
  border-bottom: 1px solid var(--border-dark);
  background: rgba(18, 22, 27, 0.6);
}
.breadcrumbs-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.breadcrumbs-nav a {
  color: var(--color-cyan);
  text-decoration: none;
}
.breadcrumbs-nav a:hover {
  color: var(--color-yellow);
}
.article-h1 {
  font-size: 2.4rem;
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.25;
  margin-bottom: 18px;
}
.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  flex-wrap: wrap;
}
.article-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  padding: 48px 0;
}
.article-main-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #d1d9e0;
  min-width: 0;
  overflow-wrap: anywhere;
}
.article-main-body h2 {
  font-size: 1.65rem;
  color: #FFFFFF;
  margin: 40px 0 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-cyan);
  display: flex;
  align-items: center;
  gap: 10px;
}
.article-main-body h2::before {
  content: "//";
  color: var(--color-yellow);
  font-family: var(--font-mono);
  font-size: 1.2rem;
}
.article-main-body h3 {
  font-size: 1.3rem;
  color: var(--color-yellow);
  margin: 28px 0 14px;
}
.article-main-body p {
  margin-bottom: 20px;
}
.article-main-body ul, .article-main-body ol {
  margin: 0 0 24px 24px;
  padding-left: 10px;
}
.article-main-body li {
  margin-bottom: 10px;
}
.article-main-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.92rem;
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
}
.article-main-body th, .article-main-body td {
  padding: 12px 16px;
  border: 1px solid var(--border-dark);
  text-align: left;
}
.article-main-body th {
  background: #14171a;
  color: var(--color-cyan);
  font-family: var(--font-mono);
  font-weight: 700;
}
.article-callout {
  background: rgba(0, 230, 240, 0.06);
  border-left: 3px solid var(--color-cyan);
  padding: 20px;
  margin: 28px 0;
  font-size: 0.95rem;
}
.article-callout.warning {
  background: rgba(255, 229, 0, 0.08);
  border-left-color: var(--color-yellow);
}
.article-callout-title {
  font-family: var(--font-mono);
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.sidebar-box {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  padding: 24px;
}
.sidebar-title {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--color-yellow);
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-dark);
  padding-bottom: 8px;
}
.related-articles-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.related-article-link {
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.9rem;
  line-height: 1.5;
  transition: color var(--transition-fast);
  display: block;
}
.related-article-link:hover {
  color: var(--color-cyan);
}

/* ==========================================================================
   响应式断点适配 (375, 390, 430, 768, 1024, 1440px)
   ========================================================================== */

/* 平板与小型桌面 (<= 1024px) */
@media (max-width: 1024px) {
  .hero-workspace-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .advantages-asymmetric-grid {
    grid-template-columns: 1fr 1fr;
  }
  .adv-gauge-card.narrow {
    grid-column: span 2;
  }
  .articles-dossier-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
}

/* 移动端与平板竖屏 (<= 768px) */
@media (max-width: 768px) {
  .article-main-body table {
    display: block;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }
  .header-main {
    padding: 10px 16px;
  }
  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(16, 18, 20, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: flex-start;
    padding: 30px 24px;
    gap: 16px;
    display: none;
    overflow-y: auto;
    border-bottom: 2px solid var(--color-cyan);
  }
  .nav-menu.open {
    display: flex;
  }
  .nav-link {
    font-size: 1.15rem;
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  .burger-btn {
    display: flex;
  }
  
  .hero-title {
    font-size: 2.1rem;
  }
  .hero-desc {
    font-size: 1rem;
  }
  
  .steps-grid,
  .advantages-asymmetric-grid,
  .node-chips-grid,
  .buses-container,
  .pricing-chips-grid,
  .articles-dossier-grid,
  .reviews-comm-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .adv-gauge-card.narrow {
    grid-column: span 1;
  }
  
  /* 移动端小窗回归文档流 */
  .telemetry-status-dock {
    position: static;
    width: 100%;
    margin-top: 24px;
    left: auto;
    bottom: auto;
  }
}

/* 紧凑手机屏幕 (<= 430px) */
@media (max-width: 430px) {
  .hero-title {
    font-size: 1.85rem;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .btn {
    width: 100%;
  }
  .container {
    padding-left: 14px;
    padding-right: 14px;
  }
}