/* ===== SKEUOMORPHIC CONTROL PANEL — styles.css ===== */

:root {
  /* --- 金属面板色系 --- */
  --chassis-bg: #1a1a1e;
  --panel-dark: #2a2a30;
  --panel-mid: #363640;
  --panel-light: #44444e;
  --panel-highlight: #55555f;
  --groove: #141417;

  /* --- 材质色 --- */
  --metal-cold: #3a3d45;
  --metal-warm: #4e4e56;
  --leather-bg: #3a2e1e;
  --leather-light: #4d3e2c;
  --wood-bg: #4a3824;
  --wood-light: #6a5238;

  /* --- 指示灯 --- */
  --led-green: #39ff14;
  --led-amber: #ffbf00;
  --led-red: #ff3b30;
  --led-blue: #00bfff;
  --led-off: #333;

  /* --- 文字 --- */
  --text-primary: #f0eeea;
  --text-secondary: #bbb8b0;
  --text-dim: #8a8680;
  --text-label: #d5d1c8;
  --text-engrave: rgba(0,0,0,0.6);

  /* --- 高光与阴影 --- */
  --bevel-light: rgba(255,255,255,0.07);
  --bevel-dark: rgba(0,0,0,0.45);
  --inner-glow: rgba(255,255,255,0.04);
  --outer-shadow: rgba(0,0,0,0.6);

  /* --- 尺寸 --- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --max-width: 1320px;

  /* --- 字体 --- */
  --font-ui: "Inter", "Microsoft YaHei", sans-serif;
  --font-mono: "Share Tech Mono", "Courier New", monospace;
  --font-display: "Orbitron", "Inter", sans-serif;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: #0e0e10;
  color: var(--text-primary);
  font-family: var(--font-ui);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

:focus-visible {
  outline: 0;
  box-shadow: 0 0 0 2px var(--led-blue), 0 0 12px rgba(0,191,255,0.3);
}

/* ===== 全局纹理 ===== */
.tex-noise {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  background-repeat: repeat;
}

.tex-vignette {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(0,0,0,0.55) 100%);
}

/* ===== 机箱外壳 ===== */
.chassis {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: 0 0 40px;
}

/* ===== 顶部金属导航条 ===== */
.rack-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 24px;
  margin-bottom: 24px;
  background: linear-gradient(180deg, #3a3a40 0%, #28282e 50%, #222228 100%);
  border-radius: var(--radius-lg);
  border-top: 1px solid rgba(255,255,255,0.1);
  border-bottom: 2px solid #111;
  box-shadow:
    0 2px 8px rgba(0,0,0,0.5),
    inset 0 1px 0 rgba(255,255,255,0.06);
}

.rack-bar__brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-label {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-label strong {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--text-primary);
}

.brand-label span:last-child {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* --- LED 指示灯 --- */
.led {
  display: inline-block;
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.5);
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.4);
}

.led--green {
  background: var(--led-green);
  box-shadow:
    inset 0 1px 2px rgba(0,0,0,0.3),
    0 0 8px rgba(57,255,20,0.6),
    0 0 20px rgba(57,255,20,0.3);
}

.led--amber {
  background: var(--led-amber);
  box-shadow:
    inset 0 1px 2px rgba(0,0,0,0.3),
    0 0 8px rgba(255,191,0,0.6),
    0 0 20px rgba(255,191,0,0.3);
}

.led--red {
  background: var(--led-red);
  box-shadow:
    inset 0 1px 2px rgba(0,0,0,0.3),
    0 0 8px rgba(255,59,48,0.6),
    0 0 20px rgba(255,59,48,0.3);
}

.led--blue {
  background: var(--led-blue);
  box-shadow:
    inset 0 1px 2px rgba(0,0,0,0.3),
    0 0 8px rgba(0,191,255,0.6),
    0 0 20px rgba(0,191,255,0.3);
}

.led--off {
  background: var(--led-off);
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.6);
}

/* --- 导航按钮（拟物按键） --- */
.rack-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.knob-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-label);
  background: linear-gradient(180deg, #444 0%, #333 100%);
  border-radius: var(--radius-sm);
  border-top: 1px solid rgba(255,255,255,0.12);
  border-bottom: 2px solid #1a1a1a;
  box-shadow:
    0 3px 6px rgba(0,0,0,0.4),
    inset 0 1px 0 rgba(255,255,255,0.08);
  transition: all 120ms ease;
  cursor: pointer;
}

.knob-link:hover {
  background: linear-gradient(180deg, #555 0%, #444 100%);
  color: #fff;
  box-shadow:
    0 3px 8px rgba(0,0,0,0.5),
    inset 0 1px 0 rgba(255,255,255,0.12),
    0 0 12px rgba(0,191,255,0.15);
}

.knob-link:active {
  background: linear-gradient(180deg, #2a2a2a 0%, #333 100%);
  border-top: 1px solid rgba(0,0,0,0.2);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  box-shadow:
    inset 0 2px 4px rgba(0,0,0,0.5),
    0 1px 2px rgba(0,0,0,0.3);
  transform: translateY(1px);
}

/* ===== 面板通用样式 ===== */
.metal-panel {
  position: relative;
  padding: 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--panel-mid) 0%, var(--panel-dark) 100%);
  border: 1px solid rgba(255,255,255,0.1);
  border-top: 1px solid rgba(255,255,255,0.15);
  border-bottom: 2px solid var(--groove);
  box-shadow:
    0 6px 24px rgba(0,0,0,0.7),
    0 1px 0 rgba(255,255,255,0.08),
    inset 0 1px 0 rgba(255,255,255,0.08),
    inset 0 -1px 0 rgba(0,0,0,0.3);
  overflow: hidden;
}

.metal-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 64 64' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='m'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.2' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23m)' opacity='0.025'/%3E%3C/svg%3E");
  pointer-events: none;
  border-radius: inherit;
}

/* --- 面板标签条（刻印标签） --- */
.panel-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding: 10px 16px;
  background: rgba(0,0,0,0.4);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.08);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.panel-label .led { margin-right: 4px; }

/* --- 皮革面板 --- */
.leather-panel {
  position: relative;
  padding: 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--leather-light) 0%, var(--leather-bg) 100%);
  border: 1px solid rgba(255,255,255,0.08);
  border-top: 1px solid rgba(255,255,255,0.12);
  border-bottom: 2px solid #1a1408;
  box-shadow:
    0 6px 24px rgba(0,0,0,0.7),
    0 1px 0 rgba(200,170,120,0.1),
    inset 0 1px 0 rgba(255,255,255,0.06);
}

.leather-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 128 128' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='l'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='2.5' numOctaves='5' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23l)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  border-radius: inherit;
}

/* --- 木纹底板 --- */
.wood-panel {
  position: relative;
  padding: 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--wood-light) 0%, var(--wood-bg) 100%);
  border: 1px solid rgba(255,255,255,0.08);
  border-top: 1px solid rgba(255,255,255,0.12);
  border-bottom: 2px solid #2a1e10;
  box-shadow:
    0 6px 24px rgba(0,0,0,0.7),
    0 1px 0 rgba(180,140,80,0.1),
    inset 0 1px 0 rgba(255,255,255,0.05);
}

.wood-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 18px,
      rgba(0,0,0,0.04) 18px,
      rgba(0,0,0,0.04) 20px
    );
  pointer-events: none;
  border-radius: inherit;
}

/* --- 玻璃面板 --- */
.glass-panel {
  position: relative;
  padding: 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255,255,255,0.09) 0%, rgba(255,255,255,0.03) 100%);
  border: 1px solid rgba(255,255,255,0.15);
  box-shadow:
    0 6px 24px rgba(0,0,0,0.5),
    inset 0 1px 0 rgba(255,255,255,0.15),
    inset 0 0 40px rgba(255,255,255,0.03);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* ===== 螺丝装饰 ===== */
.screw {
  display: inline-block;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, #666, #333 60%, #222);
  border: 1px solid #1a1a1a;
  box-shadow:
    inset 0 1px 2px rgba(255,255,255,0.15),
    0 1px 3px rgba(0,0,0,0.5);
  position: relative;
  flex-shrink: 0;
}

.screw::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 8px; height: 1.5px;
  background: #1a1a1a;
  transform: translate(-50%, -50%) rotate(35deg);
  border-radius: 1px;
}

/* ===== 拟物按钮 ===== */
.sk-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 0;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 100ms ease;
}

.sk-button--primary {
  color: #fff;
  background: linear-gradient(180deg, #4488ff 0%, #2266dd 100%);
  border-top: 1px solid rgba(255,255,255,0.25);
  border-bottom: 3px solid #1a44aa;
  box-shadow:
    0 4px 12px rgba(34,102,221,0.4),
    inset 0 1px 0 rgba(255,255,255,0.2);
}

.sk-button--primary:hover {
  background: linear-gradient(180deg, #5599ff 0%, #3377ee 100%);
  box-shadow:
    0 4px 16px rgba(34,102,221,0.5),
    inset 0 1px 0 rgba(255,255,255,0.25),
    0 0 20px rgba(68,136,255,0.2);
}

.sk-button--primary:active {
  background: linear-gradient(180deg, #1a44aa 0%, #2266dd 100%);
  border-top: 1px solid rgba(0,0,0,0.2);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  box-shadow: inset 0 3px 6px rgba(0,0,0,0.4);
  transform: translateY(2px);
}

.sk-button--secondary {
  color: var(--text-label);
  background: linear-gradient(180deg, #444 0%, #333 100%);
  border-top: 1px solid rgba(255,255,255,0.1);
  border-bottom: 3px solid #1a1a1a;
  box-shadow:
    0 3px 8px rgba(0,0,0,0.4),
    inset 0 1px 0 rgba(255,255,255,0.06);
}

.sk-button--secondary:hover {
  background: linear-gradient(180deg, #555 0%, #444 100%);
  color: #fff;
}

.sk-button--secondary:active {
  background: linear-gradient(180deg, #2a2a2a 0%, #333 100%);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  box-shadow: inset 0 3px 6px rgba(0,0,0,0.5);
  transform: translateY(2px);
}

.sk-button--ghost {
  color: var(--led-amber);
  background: transparent;
  border: 2px solid var(--led-amber);
  border-bottom-width: 3px;
  box-shadow: 0 0 8px rgba(255,191,0,0.15);
}

.sk-button--ghost:hover {
  background: rgba(255,191,0,0.1);
  box-shadow: 0 0 16px rgba(255,191,0,0.25);
}

.sk-button--ghost:active {
  background: rgba(255,191,0,0.05);
  border-bottom-width: 1px;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
  transform: translateY(2px);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ===== HERO 区 ===== */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 20px;
  margin-bottom: 24px;
}

/* ===== 仪表盘统计 ===== */
.gauge-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.gauge {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.04);
  text-align: center;
}

.gauge__value {
  display: block;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.gauge__value--green { color: var(--led-green); text-shadow: 0 0 8px rgba(57,255,20,0.4); }
.gauge__value--amber { color: var(--led-amber); text-shadow: 0 0 8px rgba(255,191,0,0.4); }
.gauge__value--blue  { color: var(--led-blue);  text-shadow: 0 0 8px rgba(0,191,255,0.4); }
.gauge__value--red   { color: var(--led-red);   text-shadow: 0 0 8px rgba(255,59,48,0.4); }

.gauge__label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.06em;
}

/* ===== 侧栏卡片 ===== */
.sidebar-stack {
  display: grid;
  gap: 20px;
}

/* ===== 标题排版 ===== */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--led-amber);
}

.eyebrow::before {
  content: "";
  width: 28px; height: 2px;
  background: var(--led-amber);
  box-shadow: 0 0 6px rgba(255,191,0,0.4);
}

.hero-title {
  margin: 16px 0 14px;
  font-family: var(--font-ui);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--text-primary);
}

.hero-title .accent {
  color: var(--led-blue);
  text-shadow: 0 0 20px rgba(0,191,255,0.25);
}

.hero-lead {
  margin: 0;
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.dropcap::first-letter {
  float: left;
  margin-right: 12px;
  font-size: 3.6rem;
  line-height: 0.9;
  font-weight: 800;
  font-family: var(--font-display);
  color: var(--led-amber);
  text-shadow: 0 0 12px rgba(255,191,0,0.3);
}

/* ===== 分隔线（金属槽） ===== */
.groove-divider {
  height: 20px;
  margin: 20px 0;
  position: relative;
}

.groove-divider::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 50%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08) 20%, rgba(255,255,255,0.08) 80%, transparent);
}

.groove-divider::after {
  content: "";
  position: absolute;
  left: calc(50% - 20px); right: calc(50% - 20px);
  top: calc(50% - 4px);
  height: 8px;
  background: linear-gradient(180deg, #555, #333);
  border-radius: 4px;
  border-top: 1px solid rgba(255,255,255,0.15);
  box-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

/* ===== 宣言面板 ===== */
.proclamation {
  margin-bottom: 24px;
}

.proclamation-title {
  margin: 16px 0 14px;
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.proclamation-copy {
  margin: 0;
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== 两栏布局 ===== */
.two-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

/* ===== 目录面板 ===== */
.toc-panel {
  position: sticky;
  top: 20px;
}

.toc-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--led-amber);
}

.toc-list {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.toc-item {
  border-radius: var(--radius-md);
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.07);
  transition: all 120ms ease;
}

.toc-item a {
  display: block;
  padding: 14px 16px;
}

.toc-item:hover {
  background: rgba(0,191,255,0.08);
  border-color: rgba(0,191,255,0.2);
  box-shadow: 0 0 12px rgba(0,191,255,0.1);
}

.toc-vol {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.toc-title {
  display: block;
  margin-top: 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.toc-desc {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-secondary);
}

/* ===== 章节面板 ===== */
.section {
  margin-bottom: 24px;
}

.section-header {
  margin-bottom: 20px;
}

.volume-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--led-green);
}

.section-title {
  margin: 10px 0 8px;
  font-size: clamp(1.6rem, 2.5vw, 2.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.section-lead {
  margin: 0;
  font-size: 16px;
  color: var(--text-secondary);
}

.section-body {
  display: grid;
  gap: 16px;
}

.section-copy {
  margin: 0;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== 卡片网格（仪表子面板） ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 16px;
}

.sub-panel {
  padding: 20px;
  border-radius: var(--radius-md);
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.08);
  border-top: 1px solid rgba(255,255,255,0.1);
  transition: all 150ms ease;
}

.sub-panel:hover {
  border-color: rgba(255,255,255,0.16);
  box-shadow: inset 0 0 24px rgba(255,255,255,0.03), 0 0 12px rgba(0,191,255,0.06);
}

.sub-panel strong {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.sub-panel strong .led { flex-shrink: 0; }

.sub-panel span, .sub-panel p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
}

/* ===== 引用面板（暗色凹槽） ===== */
.quote-recess {
  padding: 24px;
  border-radius: var(--radius-md);
  background: rgba(0,0,0,0.4);
  border: 1px solid rgba(255,255,255,0.03);
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.4);
  margin-top: 16px;
}

.quote-block {
  margin: 0 0 16px;
  padding: 18px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.03);
  border-left: 3px solid var(--led-amber);
}

.quote-block:last-child { margin-bottom: 0; }

.quote-tag {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--led-amber);
}

.quote-block p {
  margin: 0;
  font-size: 15px;
  color: var(--text-primary);
  font-style: italic;
}

/* ===== 列表（指示灯列表） ===== */
.indicator-list {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.indicator-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.07);
  font-size: 15px;
  color: var(--text-secondary);
}

.indicator-list li::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--led-amber);
  box-shadow: 0 0 6px rgba(255,191,0,0.4);
  flex-shrink: 0;
}

/* ===== 提示面板（警告灯） ===== */
.callout-panel {
  margin-top: 16px;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  background: rgba(255,191,0,0.08);
  border: 1px solid rgba(255,191,0,0.2);
  box-shadow: inset 0 0 20px rgba(255,191,0,0.03);
}

.callout-panel strong {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--led-amber);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.callout-panel p {
  margin: 0;
  font-size: 15px;
  color: var(--text-label);
}

/* ===== 附录面板 ===== */
.appendix-links {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.resource-link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 150ms ease;
}

.resource-link:hover {
  background: rgba(0,191,255,0.08);
  border-color: rgba(0,191,255,0.25);
  box-shadow: 0 0 16px rgba(0,191,255,0.1);
}

.resource-link strong {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--led-blue);
}

.resource-link span {
  font-size: 15px;
  color: var(--text-secondary);
}

/* ===== 底部铭牌 ===== */
.chassis-footer {
  padding: 32px 0 8px;
}

.nameplate {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 16px 24px;
  background: linear-gradient(180deg, #2a2a30 0%, #222228 100%);
  border-radius: var(--radius-md);
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 2px solid #111;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.nameplate p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  text-align: center;
}

/* ===== 响应式 ===== */
@media (max-width: 1100px) {
  .hero, .two-col, .card-grid {
    grid-template-columns: 1fr;
  }
  .gauge-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .toc-panel {
    position: static;
  }
}

@media (max-width: 760px) {
  .chassis {
    width: min(calc(100% - 20px), var(--max-width));
  }
  .rack-bar {
    flex-direction: column;
    align-items: flex-start;
    padding: 14px 18px;
  }
  .rack-nav {
    justify-content: flex-start;
  }
  .metal-panel, .leather-panel, .wood-panel, .glass-panel {
    padding: 22px;
  }
  .gauge-row {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 1.9rem;
  }
  .hero-lead, .proclamation-copy, .section-lead, .section-copy {
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}