/* ==========================================================================
   精灵学院 蓝图网络拓扑系统 (BLUEPRINT ROUTING SYSTEM)
   视觉规范: 暖白底色、墨黑线条、蓝图深蓝、青柠高亮、等宽坐标系统、工程图解风格
   ========================================================================== */

:root {
  /* 基础色彩系统 (Visual Palette) */
  --bg-warm: #FAF8F5;
  --bg-card: #FFFFFF;
  --bg-subtle: #F3EFE6;
  --bg-blueprint: #0E3A6E;
  --bg-blueprint-deep: #092244;
  --bg-blueprint-dark: #061830;
  
  --ink-black: #111418;
  --ink-secondary: #4A5568;
  --ink-muted: #718096;
  
  --line-color: #0E3A6E;
  --line-subtle: rgba(14, 58, 110, 0.18);
  --line-dark: rgba(17, 20, 24, 0.85);
  
  --lime-accent: #CCFF00;
  --lime-hover: #B8E600;
  --lime-glow: rgba(204, 255, 0, 0.35);
  --blue-accent: #1D58A3;
  --blue-light: #EBF3FC;
  --blue-tag: #D6E8FB;

  /* 字体系统 (System Chinese + Monospace) */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;

  /* 容器与间距 */
  --container-max: 1240px;
  --radius-none: 0px;
  --radius-sm: 2px;
  --border-width: 1px;
  
  /* 阴影 - 蓝图硬边投影风格 */
  --shadow-blueprint: 4px 4px 0px #0E3A6E;
  --shadow-blueprint-sm: 2px 2px 0px #0E3A6E;
  --shadow-lime: 4px 4px 0px #CCFF00;
  --shadow-dark: 4px 4px 0px #111418;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-warm);
  color: var(--ink-black);
  font-family: var(--font-sans);
  line-height: 1.65;
  background-image: 
    linear-gradient(var(--line-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-subtle) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: -1px -1px;
  overflow-x: hidden;
}

/* 键盘焦点无障碍 */
:focus-visible {
  outline: 2px solid var(--lime-accent);
  outline-offset: 2px;
  background-color: rgba(204, 255, 0, 0.12);
}

/* 选区色彩 */
::selection {
  background-color: var(--lime-accent);
  color: var(--ink-black);
}

/* 容器通用规范 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 等宽坐标与技术标签 */
.coord-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--blue-accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.coord-tag::before {
  content: "+";
  color: var(--lime-accent);
  font-weight: bold;
}

/* 顶部状态条 (Engineering Status Bar) */
.blueprint-status-bar {
  background-color: var(--bg-blueprint-dark);
  color: #E2E8F0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 6px 16px;
  border-bottom: 1px solid var(--blue-accent);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.status-left, .status-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--lime-accent);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--lime-accent);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* 导航头 */
.site-header {
  background-color: var(--bg-warm);
  border-bottom: 2px solid var(--line-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink-black);
}

.logo-badge {
  background-color: var(--bg-blueprint);
  color: var(--lime-accent);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: bold;
  padding: 4px 8px;
  border: 1px solid var(--lime-accent);
  box-shadow: 2px 2px 0px var(--ink-black);
}

.brand-name {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--blue-accent);
  margin-left: 4px;
}

/* 桌面导航链接 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}

.nav-link {
  color: var(--ink-black);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 6px 4px;
  position: relative;
  transition: color 0.15s ease;
}

.nav-link:hover {
  color: var(--blue-accent);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--lime-accent);
  transition: width 0.2s ease;
}

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

/* 按钮规范 (Blueprint Buttons) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
  padding: 10px 20px;
  border: 1.5px solid var(--line-color);
  cursor: pointer;
  transition: all 0.15s ease;
  position: relative;
}

.btn-primary {
  background-color: var(--lime-accent);
  color: var(--ink-black);
  border-color: var(--ink-black);
  box-shadow: var(--shadow-dark);
}

.btn-primary:hover {
  background-color: var(--lime-hover);
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0px var(--ink-black);
}

.btn-primary:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0px var(--ink-black);
}

.btn-blueprint {
  background-color: var(--bg-blueprint);
  color: #FAF8F5;
  border-color: var(--ink-black);
  box-shadow: var(--shadow-dark);
}

.btn-blueprint:hover {
  background-color: var(--blue-accent);
  color: var(--lime-accent);
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0px var(--ink-black);
}

.btn-outline {
  background-color: transparent;
  color: var(--ink-black);
  border-color: var(--line-color);
  box-shadow: var(--shadow-blueprint-sm);
}

.btn-outline:hover {
  background-color: var(--bg-subtle);
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0px var(--line-color);
}

/* 移动端汉堡菜单按钮 */
.menu-toggle {
  display: none;
  background: transparent;
  border: 1.5px solid var(--line-color);
  padding: 8px;
  cursor: pointer;
  width: 42px;
  height: 42px;
  flex-direction: column;
  justify-content: space-around;
  box-shadow: var(--shadow-blueprint-sm);
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--ink-black);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* 移动抽屉导航 */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 82%;
  max-width: 340px;
  height: 100vh;
  background-color: var(--bg-warm);
  border-left: 2px solid var(--line-color);
  z-index: 1001;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: -8px 0px 24px rgba(0,0,0,0.15);
  transition: right 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
}

.mobile-nav-drawer.active {
  right: 0;
}

.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(9, 34, 68, 0.6);
  z-index: 1000;
  backdrop-filter: blur(2px);
}

.mobile-nav-overlay.active {
  display: block;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1.5px solid var(--line-color);
  padding-bottom: 14px;
}

.close-btn {
  background: none;
  border: 1px solid var(--line-color);
  font-size: 1.4rem;
  line-height: 1;
  padding: 4px 10px;
  cursor: pointer;
  box-shadow: 2px 2px 0px var(--line-color);
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav-links a {
  text-decoration: none;
  color: var(--ink-black);
  font-size: 1.05rem;
  font-weight: 700;
  display: block;
  padding: 10px 12px;
  border: 1px solid var(--line-subtle);
  background: #FFF;
}

.mobile-nav-links a:hover {
  background-color: var(--bg-subtle);
  border-color: var(--line-color);
  color: var(--blue-accent);
}

/* ==========================================================================
   HERO 区域 - 桌面双屏切割 / 移动端文字优先
   ========================================================================== */
.hero-section {
  padding: 48px 0 64px 0;
  border-bottom: 2px solid var(--line-color);
  position: relative;
  overflow: hidden;
}

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

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

.hero-coord-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--line-color);
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  width: fit-content;
  box-shadow: 2px 2px 0px var(--line-color);
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--ink-black);
}

.hero-title .brand-highlight {
  color: var(--bg-blueprint);
  background-color: var(--lime-accent);
  padding: 2px 8px;
  display: inline-block;
  border: 1.5px solid var(--ink-black);
}

.hero-description {
  font-size: 1.12rem;
  color: var(--ink-secondary);
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}

.hero-specs-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
  padding-top: 20px;
  border-top: 1px dashed var(--line-color);
}

.spec-cell {
  background-color: var(--bg-card);
  border: 1px solid var(--line-color);
  padding: 10px 12px;
  box-shadow: 2px 2px 0px var(--line-color);
}

.spec-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  display: block;
}

.spec-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink-black);
  margin-top: 2px;
}

/* HERO 右侧轻量蓝图迷宫图解 (Maze Blueprint Visual) */
.hero-visual {
  position: relative;
  background-color: var(--bg-blueprint);
  border: 2px solid var(--ink-black);
  padding: 24px;
  color: #FAF8F5;
  box-shadow: 6px 6px 0px var(--ink-black);
}

.hero-visual::before {
  content: "┌ COORD: LAT-31.23 LON-121.47 ┐";
  position: absolute;
  top: 6px;
  left: 12px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--lime-accent);
  letter-spacing: 0.05em;
}

.hero-visual::after {
  content: "└ SPEC // ROUTE-DISCOVERY-ENGINE ┘";
  position: absolute;
  bottom: 6px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: #93C5FD;
}

.hero-svg-canvas {
  width: 100%;
  height: auto;
  display: block;
  margin: 12px 0;
  border: 1px solid rgba(204, 255, 0, 0.4);
  background-color: var(--bg-blueprint-deep);
}

.hero-visual-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #CBD5E1;
  padding-top: 8px;
  border-top: 1px dashed rgba(255,255,255,0.2);
}

.hero-visual-tag {
  color: var(--lime-accent);
  font-weight: bold;
}

/* ==========================================================================
   编号分节标题规范 (Numbered Section Headers)
   ========================================================================== */
.section-block {
  padding: 72px 0;
  border-bottom: 2px solid var(--line-color);
  position: relative;
}

.section-header {
  margin-bottom: 40px;
}

.section-stamp {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--blue-accent);
  font-weight: 700;
  margin-bottom: 8px;
}

.section-stamp-num {
  background-color: var(--bg-blueprint);
  color: var(--lime-accent);
  padding: 2px 8px;
  border: 1px solid var(--ink-black);
  box-shadow: 2px 2px 0px var(--ink-black);
}

.section-title {
  font-size: 2.1rem;
  font-weight: 850;
  color: var(--ink-black);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--ink-secondary);
  margin-top: 6px;
  max-width: 800px;
}

/* ==========================================================================
   SECTION 01: 产品核心优势 - 注解式工程手册 (Annotated Manual)
   ========================================================================== */
.manual-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.manual-card {
  background-color: var(--bg-card);
  border: 1.5px solid var(--line-color);
  padding: 24px;
  position: relative;
  box-shadow: var(--shadow-blueprint);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.manual-card::before {
  content: "";
  position: absolute;
  top: -4px;
  left: -4px;
  width: 8px;
  height: 8px;
  background-color: var(--lime-accent);
  border: 1px solid var(--ink-black);
}

.manual-card-header {
  border-bottom: 1px solid var(--line-subtle);
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.manual-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--blue-accent);
  font-weight: bold;
}

.manual-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink-black);
  margin-top: 4px;
}

.manual-body {
  font-size: 0.95rem;
  color: var(--ink-secondary);
  line-height: 1.7;
}

.manual-specs-list {
  list-style: none;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.manual-spec-item {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--ink-black);
  display: flex;
  align-items: center;
  gap: 8px;
}

.manual-spec-item span.tick {
  color: var(--blue-accent);
  font-weight: bold;
}

/* ==========================================================================
   SECTION 02: 节点网络拓扑路线图 (Route Diagram)
   ========================================================================== */
.route-diagram-container {
  background-color: var(--bg-blueprint-dark);
  border: 2px solid var(--ink-black);
  color: #FAF8F5;
  padding: 32px;
  box-shadow: var(--shadow-dark);
  position: relative;
}

.route-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--blue-accent);
  padding-bottom: 16px;
  margin-bottom: 24px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #93C5FD;
  flex-wrap: wrap;
  gap: 12px;
}

.route-svg-map {
  width: 100%;
  height: auto;
  border: 1px solid rgba(204, 255, 0, 0.3);
  background: var(--bg-blueprint-deep);
  margin-bottom: 24px;
}

.route-node-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.node-card {
  background: rgba(14, 58, 110, 0.45);
  border: 1px solid var(--blue-accent);
  padding: 16px;
  position: relative;
}

.node-card:hover {
  border-color: var(--lime-accent);
}

.node-code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--lime-accent);
  font-weight: bold;
}

.node-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: #FFF;
  margin: 4px 0;
}

.node-desc {
  font-size: 0.85rem;
  color: #CBD5E1;
  line-height: 1.5;
}

.node-badge {
  display: inline-block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background-color: rgba(204, 255, 0, 0.15);
  color: var(--lime-accent);
  padding: 2px 6px;
  border: 1px solid var(--lime-accent);
}

/* ==========================================================================
   SECTION 03: AI 与流媒体矩阵 (Editorial Comparison Table)
   ========================================================================== */
.matrix-container {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.table-blueprint-wrap {
  width: 100%;
  overflow-x: auto;
  background-color: var(--bg-card);
  border: 2px solid var(--line-color);
  box-shadow: var(--shadow-blueprint);
}

.blueprint-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.blueprint-table th {
  background-color: var(--bg-blueprint);
  color: #FAF8F5;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  padding: 14px 18px;
  border-right: 1px solid rgba(255, 255, 255, 0.15);
  border-bottom: 2px solid var(--ink-black);
}

.blueprint-table th:last-child {
  border-right: none;
}

.blueprint-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-subtle);
  border-right: 1px solid var(--line-subtle);
  color: var(--ink-black);
}

.blueprint-table td:last-child {
  border-right: none;
}

.blueprint-table tr:hover td {
  background-color: rgba(204, 255, 0, 0.08);
}

.app-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
}

.app-status {
  display: inline-block;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  border: 1px solid var(--line-color);
}

.status-optimal {
  background-color: var(--lime-accent);
  color: var(--ink-black);
}

.status-supported {
  background-color: var(--blue-light);
  color: var(--blue-accent);
}

/* ==========================================================================
   SECTION 04: 套餐价格矩阵 (Pricing Slots Table)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.pricing-slot {
  background-color: var(--bg-card);
  border: 1.5px solid var(--line-color);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  box-shadow: var(--shadow-blueprint);
  transition: transform 0.15s ease;
}

.pricing-slot:hover {
  transform: translateY(-2px);
}

.pricing-slot.recommended {
  border: 2.5px solid var(--bg-blueprint);
  box-shadow: 6px 6px 0px var(--lime-accent), 6px 6px 0px 2px var(--ink-black);
  background: #FCFFF2;
}

.slot-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--blue-accent);
  font-weight: bold;
}

.slot-ribbon {
  position: absolute;
  top: -12px;
  right: 16px;
  background-color: var(--lime-accent);
  color: var(--ink-black);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 10px;
  border: 1.5px solid var(--ink-black);
  box-shadow: 2px 2px 0px var(--ink-black);
}

.slot-name {
  font-size: 1.35rem;
  font-weight: 850;
  margin: 6px 0 10px 0;
  color: var(--ink-black);
}

.slot-price-box {
  background-color: var(--bg-subtle);
  border: 1px solid var(--line-color);
  padding: 12px;
  margin: 12px 0 16px 0;
  text-align: center;
}

.price-val {
  font-size: 1.6rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: var(--bg-blueprint);
}

.price-unit {
  font-size: 0.8rem;
  color: var(--ink-secondary);
}

.price-notice {
  font-size: 0.72rem;
  color: var(--ink-muted);
  font-family: var(--font-mono);
  margin-top: 4px;
}

.slot-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  font-size: 0.88rem;
  color: var(--ink-secondary);
}

.slot-features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.slot-features li::before {
  content: "→";
  color: var(--blue-accent);
  font-weight: bold;
}

/* ==========================================================================
   SECTION 05: 迷宫探索测试台 (Interactive Pathfinder Mini Game)
   ========================================================================== */
.game-bench-container {
  background-color: var(--bg-blueprint-dark);
  border: 2px solid var(--ink-black);
  color: #FAF8F5;
  padding: 32px;
  box-shadow: var(--shadow-dark);
}

.game-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 32px;
  align-items: start;
}

.game-canvas-wrap {
  background: var(--bg-blueprint-deep);
  border: 1.5px solid var(--blue-accent);
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

#mazeCanvas {
  max-width: 100%;
  height: auto;
  background-color: #051426;
  border: 1px solid var(--lime-accent);
  image-rendering: pixelated;
}

.game-hud {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #CBD5E1;
  flex-wrap: wrap;
  gap: 8px;
}

.hud-pill {
  background: rgba(14, 58, 110, 0.6);
  padding: 4px 10px;
  border: 1px solid var(--blue-accent);
  color: var(--lime-accent);
  font-weight: bold;
}

.game-controls-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
  background: rgba(14, 58, 110, 0.35);
  border: 1px solid var(--blue-accent);
  padding: 20px;
}

.game-instructions {
  font-size: 0.88rem;
  color: #E2E8F0;
  line-height: 1.6;
}

.game-action-btns {
  display: flex;
  gap: 12px;
}

/* 屏幕触摸方向键 D-Pad */
.dpad-container {
  display: grid;
  grid-template-columns: repeat(3, 54px);
  grid-template-rows: repeat(3, 54px);
  gap: 8px;
  margin: 10px auto;
  justify-content: center;
}

.dpad-btn {
  background: var(--bg-blueprint);
  color: var(--lime-accent);
  border: 1.5px solid var(--lime-accent);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: bold;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 2px 2px 0px #000;
  user-select: none;
  -webkit-user-select: none;
}

.dpad-btn:active {
  background: var(--lime-accent);
  color: var(--ink-black);
  transform: translate(1px, 1px);
}

.dpad-up { grid-column: 2; grid-row: 1; }
.dpad-left { grid-column: 1; grid-row: 2; }
.dpad-center { grid-column: 2; grid-row: 2; background: rgba(0,0,0,0.4); border-color: var(--blue-accent); color: var(--ink-muted); font-size: 0.75rem; }
.dpad-right { grid-column: 3; grid-row: 2; }
.dpad-down { grid-column: 2; grid-row: 3; }

.game-disclaimer-box {
  background: rgba(0, 0, 0, 0.45);
  border-left: 3px solid var(--lime-accent);
  padding: 12px;
  font-size: 0.75rem;
  color: #94A3B8;
  line-height: 1.5;
}

/* 静态无动画降级视图 */
.static-route-view {
  display: none;
  padding: 16px;
  background: #051426;
  border: 1px solid var(--blue-accent);
  color: #E2E8F0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.static-route-view.active {
  display: block;
}

/* ==========================================================================
   SECTION 06: 蓝图技术专栏 (Illustrated Blueprint Cards - 9 Articles)
   3x3 Desktop, 2 col Tablet, 1 col Mobile
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background-color: var(--bg-card);
  border: 1.5px solid var(--line-color);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-blueprint);
  position: relative;
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: 6px 6px 0px var(--bg-blueprint);
}

.card-illustration {
  background-color: var(--bg-subtle);
  border: 1px solid var(--line-subtle);
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
}

.card-illustration svg {
  width: 100%;
  height: 100%;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--blue-accent);
  margin-bottom: 8px;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink-black);
  margin-bottom: 10px;
}

.card-excerpt {
  font-size: 0.88rem;
  color: var(--ink-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  border-top: 1px dashed var(--line-subtle);
  padding-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--blue-accent);
  font-weight: bold;
}

.card-footer span.arrow {
  transition: transform 0.15s ease;
}

.article-card:hover .card-footer span.arrow {
  transform: translateX(4px);
  color: var(--ink-black);
}

/* ==========================================================================
   SECTION 07: 示例体验评测 (Marked Testimonials)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.testimonial-card {
  background-color: var(--bg-card);
  border: 1.5px solid var(--line-color);
  padding: 22px;
  box-shadow: var(--shadow-blueprint);
  position: relative;
}

.testimonial-banner {
  background-color: var(--bg-subtle);
  color: var(--blue-accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: bold;
  padding: 3px 8px;
  display: inline-block;
  margin-bottom: 12px;
  border: 1px solid var(--line-subtle);
}

.testimonial-text {
  font-size: 0.92rem;
  color: var(--ink-secondary);
  line-height: 1.65;
  font-style: italic;
  margin-bottom: 16px;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px dashed var(--line-subtle);
  padding-top: 12px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  background-color: var(--bg-blueprint);
  color: var(--lime-accent);
  font-family: var(--font-mono);
  font-weight: bold;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink-black);
}

.user-info-name {
  font-size: 0.9rem;
  font-weight: 750;
  color: var(--ink-black);
}

.user-info-role {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
}

/* ==========================================================================
   SECTION 08: 常见答疑 (Accordion FAQ)
   ========================================================================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1.5px solid var(--line-color);
  box-shadow: var(--shadow-blueprint-sm);
  transition: all 0.2s ease;
}

.faq-item[open] {
  box-shadow: var(--shadow-blueprint);
  border-color: var(--bg-blueprint);
}

.faq-summary {
  padding: 18px 22px;
  font-size: 1.05rem;
  font-weight: 750;
  color: var(--ink-black);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

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

.faq-summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--blue-accent);
  transition: transform 0.2s ease;
}

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

.faq-content {
  padding: 0 22px 20px 22px;
  font-size: 0.95rem;
  color: var(--ink-secondary);
  line-height: 1.7;
  border-top: 1px dashed var(--line-subtle);
  padding-top: 16px;
}

/* ==========================================================================
   页脚 (Concise Footer)
   包含内部链接、合规声明、以及 3 个指定的编辑推荐链接
   ========================================================================== */
.site-footer {
  background-color: var(--bg-blueprint-dark);
  color: #E2E8F0;
  border-top: 3px solid var(--lime-accent);
  padding: 60px 0 32px 0;
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: #94A3B8;
  line-height: 1.7;
  margin-top: 12px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--lime-accent);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.footer-links a {
  color: #CBD5E1;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--lime-accent);
  text-decoration: underline;
}

.footer-disclosure-box {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 16px;
  font-size: 0.78rem;
  color: #94A3B8;
  line-height: 1.6;
  margin-bottom: 30px;
}

.footer-bottom-bar {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #64748B;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   文章通用内页模板样式 (Article Page Styling)
   ========================================================================== */
.article-header {
  padding: 40px 0 30px 0;
  border-bottom: 2px solid var(--line-color);
  background-color: var(--bg-card);
}

.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.breadcrumbs a {
  color: var(--blue-accent);
  text-decoration: none;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.article-main-title {
  font-size: 2.3rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--ink-black);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
  padding-top: 12px;
  border-top: 1px dashed var(--line-subtle);
}

.article-body-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  padding: 48px 0;
}

.article-prose {
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--ink-black);
}

.article-prose h2 {
  font-size: 1.6rem;
  font-weight: 850;
  margin: 36px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1.5px solid var(--line-color);
  color: var(--bg-blueprint);
}

.article-prose h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin: 24px 0 12px 0;
  color: var(--ink-black);
}

.article-prose p {
  margin-bottom: 18px;
}

.article-prose ul, .article-prose ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-prose li {
  margin-bottom: 8px;
}

.article-prose blockquote {
  background-color: var(--bg-subtle);
  border-left: 4px solid var(--bg-blueprint);
  padding: 16px 20px;
  margin: 24px 0;
  font-style: italic;
  color: var(--ink-secondary);
}

.article-prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--bg-subtle);
  padding: 2px 6px;
  border: 1px solid var(--line-subtle);
}

.article-prose pre {
  background-color: var(--bg-blueprint-dark);
  color: #FAF8F5;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  padding: 18px;
  overflow-x: auto;
  border: 1.5px solid var(--ink-black);
  margin: 24px 0;
}

.article-prose pre code {
  background-color: transparent;
  border: none;
  color: inherit;
  padding: 0;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background-color: var(--bg-card);
  border: 1.5px solid var(--line-color);
  padding: 20px;
  box-shadow: var(--shadow-blueprint-sm);
}

.sidebar-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--blue-accent);
  font-weight: 800;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line-subtle);
  padding-bottom: 8px;
}

/* ==========================================================================
   响应式断点系统 (Responsive Breakpoints)
   精准适配 375px / 390px / 430px / 768px / 1024px / 1440px
   ========================================================================== */

/* 1024px 平板横屏 / 较小桌面 */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .manual-grid {
    grid-template-columns: 1fr;
  }

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

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

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

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

  .game-layout {
    grid-template-columns: 1fr;
  }

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

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

/* 768px 平板竖屏 */
@media (max-width: 768px) {
  .blueprint-status-bar {
    display: none; /* 移动端精简顶栏 */
  }

  .nav-links {
    display: none; /* 隐藏桌面导航 */
  }

  .menu-toggle {
    display: flex; /* 呈现汉堡菜单按钮 */
  }

  .hero-title {
    font-size: 2.1rem;
  }

  .hero-specs-strip {
    grid-template-columns: 1fr;
  }

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

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

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

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

/* 430px / 390px / 375px 窄屏手机 */
@media (max-width: 480px) {
  .container {
    padding-left: 14px;
    padding-right: 14px;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-description {
    font-size: 0.98rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .route-node-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-ctas .btn {
    width: 100%;
  }

  .dpad-container {
    grid-template-columns: repeat(3, 48px);
    grid-template-rows: repeat(3, 48px);
    gap: 6px;
  }

  .dpad-btn {
    font-size: 1rem;
  }
}

/* ==========================================================================
   Prefers-Reduced-Motion 减弱动效与静态降级规范
   ========================================================================== */
@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;
  }

  .status-indicator {
    animation: none !important;
  }

  #mazeCanvas {
    display: none !important;
  }

  .static-route-view {
    display: block !important;
  }

  .dpad-container {
    display: none !important;
  }
}