/* ====================================================================
   雪橇云 - 设计说明 03：复古掌机 / 像素 HUD 样式表
   配色：双色印刷 + 翠绿 (#2E6B4E) + 纸色米白 (#F4F0E6) + 砖红撞色 (#C23B3B)
   招牌动效：定价卡 3D 翻转卡片
   ==================================================================== */

:root {
  --paper: #F4F0E6;           /* 纸色背景 */
  --paper-card: #FFFFFF;      /* 高亮纸白 */
  --paper-subtle: #EBE5D6;    /* 略暗底色 */
  --ink-green: #2E6B4E;       /* 主墨色 (翠绿) */
  --ink-green-light: #E2ECE5; /* 极浅绿底色 */
  --ink-dark: #1A3A2A;        /* 深墨色 */
  --accent-red: #C23B3B;      /* 唯一 CTA 撞色 (红键) */
  --accent-red-hover: #A82E2E;/* 红键悬停 */
  --text-main: #1A3A2A;       /* 主文字墨色 */
  --text-muted: #5A7A6A;      /* 辅助墨绿灰 */
  --pixel-border: #2E6B4E;    /* 像素边框色 */
  
  --shadow-pixel: 4px 4px 0px #1A3A2A;
  --shadow-pixel-sm: 2px 2px 0px #1A3A2A;
  --shadow-pixel-lg: 6px 6px 0px #1A3A2A;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, "SF Mono", Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --max-width: 1140px;
  --max-width-text: 820px;
  --header-height: 68px;
  --mobile-cta-height: 64px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--paper);
  background-image: 
    radial-gradient(circle, #E5DFD0 10%, transparent 11%),
    radial-gradient(circle, #E5DFD0 10%, transparent 11%);
  background-size: 16px 16px;
  background-position: 0 0, 8px 8px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

a {
  color: var(--ink-green);
  text-decoration: none;
  transition: all 0.15s ease;
}

a:hover {
  color: var(--accent-red);
}

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* 布局容器 */
.layout-container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.layout-narrow {
  max-width: var(--max-width-text);
}

/* 像素风格按键 / 按钮规范 */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 10px 22px;
  border: 3px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel);
  transition: all 0.1s ease;
  white-space: nowrap;
  line-height: 1.3;
  cursor: pointer;
  background-color: var(--paper);
  color: var(--ink-dark);
}

.button:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0px var(--ink-dark);
}

.button:active {
  transform: translate(4px, 4px);
  box-shadow: 0px 0px 0px var(--ink-dark);
}

/* 主 CTA: 掌机 A 键 (红键) */
.button-primary {
  background-color: var(--accent-red);
  color: #FFFFFF !important;
  border-color: var(--ink-dark);
}

.button-primary:hover {
  background-color: var(--accent-red-hover);
  color: #FFFFFF !important;
}

/* 次 CTA: 掌机 B 键 (墨绿边框纸白) */
.button-secondary {
  background-color: var(--paper-card);
  color: var(--ink-dark);
}

.button-secondary:hover {
  background-color: var(--ink-green-light);
  color: var(--ink-green);
}

.button-accent {
  background-color: var(--ink-green);
  color: #FFFFFF !important;
}

.button-accent:hover {
  background-color: #22513B;
}

.button-lg {
  padding: 14px 30px;
  font-size: 1.05rem;
}

.button-block {
  width: 100%;
}

/* 掌机顶部状态栏 Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--paper);
  border-bottom: 3px solid var(--ink-dark);
  box-shadow: 0 4px 0 rgba(26, 58, 42, 0.08);
  height: var(--header-height);
}

.site-header .layout-container {
  max-width: 1260px;
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--ink-dark);
  flex-shrink: 0;
  white-space: nowrap;
}

.brand-logo svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

/* 状态栏 HUD 元素 (电量、槽位、时间) */
.hud-status-strip {
  display: none;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  border: 2px dashed var(--pixel-border);
  padding: 3px 8px;
  background-color: var(--paper-subtle);
  flex-shrink: 0;
  white-space: nowrap;
}

.hud-battery {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 700;
  color: var(--ink-dark);
}

.hud-battery-bars {
  display: inline-flex;
  gap: 2px;
  padding: 2px 3px;
  border: 2px solid var(--ink-dark);
  background: var(--paper-card);
}

.hud-battery-bars span {
  display: block;
  width: 5px;
  height: 10px;
  background-color: var(--ink-green);
}

/* 辅助动效 1：电量末格轻微闪烁 */
.hud-battery-bars span:last-child {
  animation: batteryPulse 1.8s infinite ease-in-out;
}

@keyframes batteryPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

@media (prefers-reduced-motion: reduce) {
  .hud-battery-bars span:last-child {
    animation: none;
    opacity: 1;
  }
}

.main-navigation {
  display: none;
  flex: 0 1 auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: nowrap;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink-dark);
  padding: 4px 6px;
  border: 2px solid transparent;
  white-space: nowrap; /* 核心：防止导航文字分上下行折行 */
  word-break: keep-all; /* 防止中文字间截断 */
  display: inline-block;
  line-height: 1.25;
}

.nav-link:hover, .nav-link.active {
  color: var(--ink-green);
  border: 2px solid var(--ink-dark);
  background-color: var(--ink-green-light);
  box-shadow: 2px 2px 0px var(--ink-dark);
}

.header-action-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.burger-menu-button {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  padding: 6px;
  background: var(--paper-card);
  border: 2px solid var(--ink-dark);
  box-shadow: 2px 2px 0px var(--ink-dark);
}

.burger-menu-button span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--ink-dark);
  transition: all 0.2s ease;
}

.burger-menu-button.is-active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.burger-menu-button.is-active span:nth-child(2) {
  opacity: 0;
}
.burger-menu-button.is-active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* 移动端侧边抽屉 */
.mobile-drawer-menu {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--paper);
  z-index: 999;
  padding: 24px 20px;
  border-top: 3px solid var(--ink-dark);
  overflow-y: auto;
}

.mobile-drawer-menu.is-open {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav-link {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink-dark);
  padding: 10px 14px;
  background-color: var(--paper-card);
  border: 2px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel-sm);
}

.mobile-nav-link:hover {
  background-color: var(--ink-green-light);
  color: var(--ink-green);
}

/* Hero 开机画面与主菜单对话框 */
.hero-section {
  position: relative;
  padding: 48px 0 60px;
  border-bottom: 3px solid var(--ink-dark);
  background-color: var(--paper);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

/* 游戏 HUD 对话框容器 (像素边缘) */
.pixel-dialog-box {
  background-color: var(--paper-card);
  border: 3px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel-lg);
  padding: 28px 24px;
  position: relative;
}

.pixel-dialog-header {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: #FFFFFF;
  background-color: var(--ink-green);
  border: 2px solid var(--ink-dark);
  padding: 4px 12px;
  box-shadow: 2px 2px 0px var(--ink-dark);
  margin-bottom: 20px;
}

.hero-headline {
  font-family: var(--font-mono), var(--font-family);
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--ink-dark);
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}

.hero-headline-highlight {
  color: var(--accent-red);
  text-decoration: underline;
  text-underline-offset: 6px;
}

/* 辅助动效 2：打字机效果 (首屏副标题) */
.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-main);
  line-height: 1.75;
  margin-bottom: 26px;
  max-width: 620px;
  border-left: 3px solid var(--ink-green);
  padding-left: 14px;
}

.hero-action-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 26px;
}

.hero-feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-dark);
}

.hero-tag-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--paper-subtle);
  border: 2px solid var(--ink-dark);
  padding: 4px 10px;
}

.hero-tag-item svg {
  width: 14px;
  height: 14px;
  color: var(--ink-green);
}

/* Hero 右侧掌机画面屏 */
.hero-screen-frame {
  background-color: #2E6B4E;
  border: 4px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel-lg);
  padding: 16px;
  color: #F4F0E6;
}

.screen-crt-inner {
  background-color: #1A3A2A;
  border: 2px solid #3D8B66;
  padding: 20px;
  font-family: var(--font-mono);
}

.screen-hud-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px dashed #3D8B66;
  padding-bottom: 10px;
  margin-bottom: 14px;
  font-size: 0.85rem;
  color: #7EDBB0;
}

.screen-metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

.screen-metric-box {
  background-color: #244C38;
  border: 1px solid #3D8B66;
  padding: 10px;
}

.screen-metric-label {
  font-size: 0.72rem;
  color: #A3D8BD;
  margin-bottom: 4px;
}

.screen-metric-val {
  font-size: 1.15rem;
  font-weight: 800;
  color: #FFFFFF;
}

.screen-status-banner {
  background-color: #C23B3B;
  color: #FFFFFF;
  text-align: center;
  padding: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  border: 1px solid #1A3A2A;
}

/* 区块公用样式 */
.section-wrapper {
  padding: 60px 0;
  border-bottom: 3px solid var(--ink-dark);
}

.section-wrapper-alt {
  background-color: var(--paper-card);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 40px;
}

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--ink-green);
  background-color: var(--paper-subtle);
  border: 2px solid var(--ink-dark);
  padding: 3px 12px;
  box-shadow: 2px 2px 0px var(--ink-dark);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-mono), var(--font-family);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--ink-dark);
  line-height: 1.35;
  margin-bottom: 12px;
}

.section-description {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 特性区块：物品栏四格 (ITEM INVENTORY) + 像素小机器人吉祥物 */
.inventory-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

.mascot-sidebar {
  display: flex;
  align-items: center;
  gap: 16px;
  background-color: var(--paper-subtle);
  border: 3px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel);
  padding: 16px 20px;
  margin-bottom: 24px;
}

.mascot-avatar {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
}

.mascot-dialogue {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--ink-dark);
  line-height: 1.5;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.inventory-slot-card {
  background-color: var(--paper-card);
  border: 3px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel);
  padding: 24px 20px;
  position: relative;
  transition: all 0.15s ease;
}

.inventory-slot-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-pixel-lg);
  border-color: var(--ink-green);
}

.slot-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  color: #FFFFFF;
  background-color: var(--ink-dark);
  padding: 2px 8px;
  display: inline-block;
  margin-bottom: 12px;
}

.feature-card-title {
  font-family: var(--font-mono), var(--font-family);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--ink-dark);
  margin-bottom: 8px;
}

.feature-card-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 流媒体与生产力支持区块 (像素任务徽章) */
.streaming-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.streaming-item-card {
  background-color: var(--paper);
  border: 3px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel-sm);
  padding: 18px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.streaming-badge {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  width: 44px;
  height: 44px;
  border: 2px solid var(--ink-dark);
  background-color: var(--paper-card);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 2px 2px 0px var(--ink-dark);
}

.streaming-item-title {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 800;
  color: var(--ink-dark);
  margin-bottom: 4px;
}

.streaming-item-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* 三大人群对照 (角色选择界面) */
.audience-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.audience-card {
  background-color: var(--paper-card);
  border: 3px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel);
  padding: 26px 20px;
  display: flex;
  flex-direction: column;
}

.audience-class-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 800;
  background-color: var(--ink-green-light);
  color: var(--ink-green);
  border: 2px solid var(--ink-dark);
  padding: 3px 10px;
  display: inline-block;
  margin-bottom: 12px;
  align-self: flex-start;
}

.audience-title {
  font-family: var(--font-mono), var(--font-family);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink-dark);
  margin-bottom: 16px;
}

.audience-point-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
  flex-grow: 1;
}

.audience-point-item {
  font-size: 0.92rem;
  color: var(--text-main);
  line-height: 1.55;
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

.audience-point-item::before {
  content: "▶";
  font-size: 0.72rem;
  color: var(--ink-green);
  margin-top: 3px;
  flex-shrink: 0;
}

/* 使用场景卡片 (存档点记录 SAVE POINTS) */
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.scenario-card {
  background-color: var(--paper-card);
  border: 3px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel);
  padding: 24px 20px;
}

.scenario-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  border-bottom: 2px dashed var(--pixel-border);
  padding-bottom: 8px;
}

.scenario-title {
  font-family: var(--font-mono), var(--font-family);
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--ink-dark);
}

.scenario-save-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  background-color: var(--paper-subtle);
  border: 2px solid var(--ink-dark);
  padding: 2px 8px;
  color: var(--text-muted);
}

.scenario-description {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ====================================================================
   招牌动效：定价存档卡 3D 翻转 (FLIP CARDS)
   ==================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.pricing-flip-container {
  perspective: 1200px;
  min-height: 440px;
}

.pricing-flip-card {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 悬停或由 JS 添加 .is-flipped 时触发 3D 翻转 */
.pricing-flip-container:hover .pricing-flip-card,
.pricing-flip-card.is-flipped {
  transform: rotateY(180deg);
}

.pricing-face {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background-color: var(--paper-card);
  border: 3px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel);
  padding: 26px 20px;
  display: flex;
  flex-direction: column;
}

.pricing-face-back {
  transform: rotateY(180deg);
  background-color: var(--ink-green-light);
}

/* 推荐稀有卡高亮样式 */
.pricing-flip-container.is-recommended .pricing-face {
  border-color: var(--ink-dark);
  box-shadow: var(--shadow-pixel-lg);
}

.card-rarity-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 8px;
  border: 2px solid var(--ink-dark);
  display: inline-block;
  margin-bottom: 10px;
  align-self: flex-start;
  background-color: var(--paper-subtle);
}

.card-rarity-rare {
  background-color: var(--accent-red);
  color: #FFFFFF;
}

.pricing-tier-name {
  font-family: var(--font-mono), var(--font-family);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--ink-dark);
  margin-bottom: 6px;
}

.pricing-tier-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.pricing-price-box {
  background-color: var(--paper);
  border: 2px solid var(--ink-dark);
  padding: 16px;
  text-align: center;
  margin-bottom: 20px;
}

.pricing-price-notice {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--accent-red);
  margin-bottom: 4px;
}

.pricing-price-subtext {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.flip-hint-btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ink-green);
  background-color: var(--paper-subtle);
  border: 2px dashed var(--ink-dark);
  padding: 8px 12px;
  text-align: center;
  margin-top: auto;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.flip-hint-btn:hover {
  background-color: var(--paper);
  color: var(--ink-dark);
}

.pricing-feature-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
  flex-grow: 1;
}

.pricing-feature-item {
  font-size: 0.88rem;
  color: var(--text-main);
  line-height: 1.45;
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

.pricing-feature-item::before {
  content: "✔";
  color: var(--ink-green);
  font-weight: 800;
  flex-shrink: 0;
}

/* prefers-reduced-motion: 禁用 3D 翻转，采用正反面平铺显示 */
@media (prefers-reduced-motion: reduce) {
  .pricing-flip-container {
    perspective: none;
    min-height: auto;
  }
  .pricing-flip-card {
    transform-style: flat;
    transition: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  .pricing-flip-container:hover .pricing-flip-card,
  .pricing-flip-card.is-flipped {
    transform: none;
  }
  .pricing-face {
    position: static;
    backface-visibility: visible;
    -webkit-backface-visibility: visible;
    height: auto;
  }
  .pricing-face-back {
    transform: none;
  }
  .flip-hint-btn {
    display: none;
  }
}

/* FAQ 常见问题 (NPC 答疑对话框) */
.faq-accordion-group {
  max-width: var(--max-width-text);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background-color: var(--paper-card);
  border: 3px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel-sm);
  transition: all 0.15s ease;
}

.faq-item.is-open {
  box-shadow: var(--shadow-pixel);
  border-color: var(--ink-green);
}

.faq-question-btn {
  width: 100%;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  text-align: left;
  font-family: var(--font-mono), var(--font-family);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink-dark);
}

.faq-question-btn:hover {
  color: var(--ink-green);
}

.faq-toggle-icon {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--ink-green);
  flex-shrink: 0;
}

.faq-answer-panel {
  display: none;
  padding: 0 20px 18px;
  font-size: 0.93rem;
  color: var(--text-main);
  line-height: 1.7;
  border-top: 2px dashed var(--pixel-border);
  padding-top: 14px;
}

.faq-item.is-open .faq-answer-panel {
  display: block;
}

/* Final CTA 按键收尾区块 (PRESS A TO START) */
.final-cta-section {
  background-color: var(--ink-dark);
  color: var(--paper);
  padding: 64px 0;
  text-align: center;
  border-bottom: 3px solid var(--ink-dark);
  position: relative;
}

.final-cta-content {
  max-width: 680px;
  margin: 0 auto;
}

.press-key-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--accent-red);
  border: 2px solid var(--accent-red);
  padding: 4px 14px;
  box-shadow: 2px 2px 0px var(--accent-red);
  margin-bottom: 16px;
}

.final-cta-title {
  font-family: var(--font-mono), var(--font-family);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.35;
  color: #FFFFFF;
  margin-bottom: 14px;
}

.final-cta-desc {
  font-size: 1.02rem;
  color: #A3D8BD;
  line-height: 1.7;
  margin-bottom: 28px;
}

.final-cta-btn-wrap {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* 移动端吸底 CTA 栏 */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--mobile-cta-height);
  background-color: var(--paper);
  border-top: 3px solid var(--ink-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 990;
  box-shadow: 0 -4px 0 rgba(26, 58, 42, 0.1);
}

.mobile-sticky-text {
  display: flex;
  flex-direction: column;
}

.mobile-sticky-title {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--ink-dark);
}

.mobile-sticky-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* 页脚 Footer (掌机按键说明与版权) */
.site-footer {
  background-color: var(--paper-subtle);
  color: var(--text-main);
  padding: 50px 0 32px;
  font-size: 0.88rem;
  line-height: 1.6;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

.footer-brand {
  max-width: 340px;
}

.footer-brand p {
  margin-top: 12px;
  color: var(--text-muted);
}

.footer-column-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--ink-dark);
  margin-bottom: 14px;
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-family: var(--font-mono);
}

.footer-nav-list a {
  color: var(--text-main);
}

.footer-nav-list a:hover {
  color: var(--accent-red);
}

.footer-pad-legend {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  border: 2px dashed var(--pixel-border);
  padding: 10px 14px;
  margin-top: 20px;
  background: var(--paper-card);
}

.footer-disclosure-box {
  background-color: var(--paper-card);
  border: 2px solid var(--ink-dark);
  padding: 10px 14px;
  font-size: 0.82rem;
  margin-bottom: 24px;
}

.footer-bottom {
  border-top: 2px solid var(--ink-dark);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 文章页 & 合规页样式 */
.page-container {
  padding: 40px 0 60px;
}

.breadcrumb-trail {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.article-header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 3px solid var(--ink-dark);
}

.article-title {
  font-family: var(--font-mono), var(--font-family);
  font-size: 2rem;
  font-weight: 800;
  color: var(--ink-dark);
  line-height: 1.35;
  margin-bottom: 14px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.article-intro {
  background-color: var(--paper-card);
  border: 3px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel);
  padding: 20px 22px;
  margin: 24px 0;
  font-size: 1rem;
  color: var(--text-main);
  line-height: 1.75;
}

.article-body {
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--text-main);
}

.article-body h2 {
  font-family: var(--font-mono), var(--font-family);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--ink-dark);
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink-dark);
}

.article-body h3 {
  font-family: var(--font-mono), var(--font-family);
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--ink-dark);
  margin: 22px 0 10px;
}

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

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

.article-body ul {
  list-style: square;
}

.article-body ol {
  list-style: decimal;
}

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

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.92rem;
  background-color: var(--paper-card);
  border: 3px solid var(--ink-dark);
}

.article-body th, .article-body td {
  border: 2px solid var(--ink-dark);
  padding: 10px 14px;
  text-align: left;
}

.article-body th {
  background-color: var(--ink-green-light);
  font-family: var(--font-mono);
  font-weight: 800;
  color: var(--ink-dark);
}

.article-cta-box {
  background-color: var(--paper-card);
  border: 3px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel);
  padding: 28px;
  margin: 36px 0 28px;
  text-align: center;
}

.article-cta-title {
  font-family: var(--font-mono), var(--font-family);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink-dark);
  margin-bottom: 10px;
}

.article-cta-desc {
  font-size: 0.94rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.article-related-links {
  background-color: var(--paper-card);
  border: 3px solid var(--ink-dark);
  box-shadow: var(--shadow-pixel-sm);
  padding: 20px;
  margin-top: 32px;
}

.article-related-title {
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--ink-dark);
  margin-bottom: 10px;
}

.article-related-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--font-mono);
}

/* 响应式断点 */
@media (min-width: 768px) {
  .hero-headline {
    font-size: 2.65rem;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .audience-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .scenarios-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  .mobile-sticky-bar {
    display: none;
  }
}

/* 768px ~ 1023px：平板端 (抽屉导航模式下展示 HUD 状态栏) */
@media (min-width: 768px) and (max-width: 1023px) {
  .hud-status-strip {
    display: inline-flex;
  }
}

/* 1024px：桌面端主导航展开 */
@media (min-width: 1024px) {
  .main-navigation {
    display: block;
  }
  .burger-menu-button {
    display: none;
  }
  .hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  /* 1024px ~ 1239px：优先保障 7 个导航项完整单行横排，隐藏 HUD 以免挤占导航栏 */
  .hud-status-strip {
    display: none;
  }
}

/* 1240px：宽屏桌面端，宽度充裕，同时展示 HUD 状态栏与完整单行导航 */
@media (min-width: 1240px) {
  .hud-status-strip {
    display: inline-flex;
  }
  .nav-list {
    gap: 12px;
  }
  .nav-link {
    font-size: 0.92rem;
    padding: 4px 8px;
  }
}