/* ============================================================
 * MECCHA CHAMELEON Guide styles
 * 
 * 
 * ============================================================ */

/* --- CSS 自定义属性（设计令牌） --- */
:root {
  /* 背景色系 */
  --aa-bg: #f7f5f2;
  --aa-bg-elevated: #ffffff;
  --aa-surface: #ffffff;
  --aa-surface-hover: #f0ece6;

  /* 边框 */
  --aa-border: rgba(26, 32, 44, 0.08);
  --aa-border-strong: rgba(26, 32, 44, 0.14);

  /* 文字颜色 */
  --aa-text: #1c2128;
  --aa-text-muted: #5a6270;
  --aa-text-dim: #8a919c;

  /* 强调色（青色/绿色系） */
  --aa-accent: #2a9d8f;
  --aa-accent-hover: #238276;
  --aa-accent-glow: rgba(42, 157, 143, 0.22);

  /* 紫色系 */
  --aa-purple: #7c5cbf;
  --aa-purple-dim: rgba(124, 92, 191, 0.1);

  /* 渐变色 */
  --aa-gradient-hero: linear-gradient(145deg, #fefcf9, #f7f5f2 45%, #eef6f3);
  --aa-gradient-cta: linear-gradient(135deg, #e76f51, #2a9d8f);
  --aa-gradient-card: linear-gradient(160deg, rgba(42, 157, 143, 0.07), rgba(231, 111, 81, 0.05));

  /* 英雄区域颜色 */
  --aa-hero-title: #1c2128;
  --aa-hero-subtitle: #3d4654;
  --aa-hero-meta: #6b7280;

  /* 统计卡片 */
  --aa-stat-bg: rgba(255, 255, 255, 0.88);
  --aa-stat-border: rgba(26, 32, 44, 0.1);

  /* 跳转导航 */
  --aa-jump-nav-bg: rgba(255, 255, 255, 0.92);

  /* 页头 */
  --aa-header-bg: rgba(255, 255, 255, 0.92);
  --aa-header-height: 3.5rem;

  /* 按钮主色文字 */
  --aa-btn-primary-text: #ffffff;

  /* 圆角 */
  --aa-radius-sm: 8px;
  --aa-radius: 12px;
  --aa-radius-lg: 16px;
  --aa-radius-pill: 999px;

  /* 阴影 */
  --aa-shadow: 0 4px 24px rgba(28, 33, 40, 0.07);
  --aa-shadow-glow: 0 8px 28px rgba(42, 157, 143, 0.14);

  /* 字体 */
  --aa-font: "Gabarito", "Segoe UI", system-ui, sans-serif;
  --aa-font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* 最大宽度 */
  --aa-max-width: 1120px;

  /* 等级颜色 */
  --aa-tier-splus: #d4a017;
  --aa-tier-s: #7c5cbf;
  --aa-tier-a: #2a9d8f;
  --aa-tier-b: #6b9080;
  --aa-tier-c: #9ca3af;

  /* 徽章颜色 */
  --aa-badge-new: #2a9d8f;
  --aa-badge-active: #e76f51;
  --aa-badge-conflict: #f4a261;

  /* 游戏主题色 */
  --aa-cyan: #2a9d8f;
  --aa-roblox-green: #2a9d8f;
  --aa-roblox-red: #e76f51;
}

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

html, body {
  padding: 0;
  margin: 0;
  font-family: var(--aa-font);
  overflow-x: clip;
  background: var(--aa-bg);
  color: var(--aa-text);
}

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

/* --- 选中文本样式 --- */
::selection {
  background: rgba(42, 157, 143, 0.25);
  color: var(--aa-text);
}

/* --- 无障碍焦点样式 --- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--aa-accent);
  outline-offset: 2px;
}

/* --- 减少动画偏好 --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================
 * 页头 (Header) — 固定顶部导航栏
 * ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--aa-header-height);
  background: var(--aa-header-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--aa-border);
}

/* 页头内部容器 */
.header-inner {
  max-width: var(--aa-max-width);
  margin: 0 auto;
  height: 100%;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* 品牌标志区域 */
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--aa-text);
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: var(--aa-radius-sm);
  object-fit: cover;
  border: 2px solid var(--aa-border-strong);
}

.brand-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-suffix {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--aa-purple);
  background: var(--aa-purple-dim);
  padding: 0.15rem 0.45rem;
  border-radius: var(--aa-radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* --- 桌面端主导航 --- */
.main-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.2rem;
  justify-content: flex-end;
}

/* 导航链接 */
.nav-link {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--aa-text-muted);
  padding: 0.45rem 0.7rem;
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  border-radius: var(--aa-radius-sm);
  transition: color 0.15s, background 0.15s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--aa-accent);
  background: var(--aa-surface-hover);
}

/* --- 下拉菜单 --- */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.4rem 0.65rem;
  border: none;
  border-radius: var(--aa-radius-sm);
  background: transparent;
  color: var(--aa-text-muted);
  font: inherit;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}

.nav-dropdown-trigger:hover {
  color: var(--aa-text);
  background: var(--aa-surface);
}

.dropdown-chevron {
  font-size: 0.65rem;
  opacity: 0.85;
  line-height: 1;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 11.5rem;
  padding: 0.45rem 0 0.35rem;
  background: var(--aa-bg-elevated);
  border: 1px solid var(--aa-border-strong);
  border-radius: var(--aa-radius-sm);
  box-shadow: var(--aa-shadow-glow);
  z-index: 200;
}

.nav-dropdown.open .nav-dropdown-menu {
  display: block;
}

.nav-dropdown-item {
  display: block;
  padding: 0.5rem 0.85rem;
  color: var(--aa-text-muted);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 600;
  white-space: nowrap;
  transition: color 0.15s, background 0.15s;
}

.nav-dropdown-item:hover {
  color: var(--aa-text);
  background: var(--aa-surface);
}

/* --- 移动端菜单按钮 --- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.menu-btn {
  display: none;
  background: var(--aa-surface);
  border: 1px solid var(--aa-border-strong);
  color: var(--aa-text);
  border-radius: var(--aa-radius-sm);
  padding: 0.45rem 0.65rem;
  min-width: 2.75rem;
  min-height: 2.75rem;
  font-size: 1.1rem;
  cursor: pointer;
  line-height: 1;
}

/* --- 移动端侧边导航 --- */
.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 0.5rem 1.25rem 1rem;
  border-top: 1px solid var(--aa-border);
  background: var(--aa-bg-elevated);
}

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

.sidebar-link {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--aa-text-muted);
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--aa-border);
  text-decoration: none;
}

.sidebar-link:hover {
  color: var(--aa-accent);
}

/* --- 移动端下拉 --- */
.sidebar-dropdown {
  display: flex;
  flex-direction: column;
}

.sidebar-dropdown-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.65rem 0;
  border: none;
  border-bottom: 1px solid var(--aa-border);
  background: transparent;
  color: var(--aa-text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}

.sidebar-dropdown-menu {
  display: flex;
  flex-direction: column;
  padding: 0 0 0.35rem 0.75rem;
}

.sidebar-dropdown-link {
  display: block;
  padding: 0.55rem 0;
  color: var(--aa-text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
}

.sidebar-dropdown-link:hover {
  color: var(--aa-accent);
}

/* ============================================================
 * 主内容区
 * ============================================================ */
.site-main {
  width: 100%;
  padding-top: var(--aa-header-height);
  background: var(--aa-bg);
  color: var(--aa-text);
  font-family: var(--aa-font);
}

.content-wrap {
  max-width: var(--aa-max-width);
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

/* ============================================================
 * 英雄区 (Hero Section) — 首页顶部大标题区域
 * ============================================================ */
.hero {
  position: relative;
  margin-bottom: 0;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding: 3.25rem max(1.25rem, calc(50vw - var(--aa-max-width) / 2 + 1.25rem)) 2.75rem;
  min-height: clamp(20rem, 48vh, 28rem);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 1.5rem 2rem;
  align-items: center;
  background: var(--aa-gradient-hero);
  overflow: hidden;
}

/* 英雄区背景图片 */
.hero-bg {
  position: relative;
  grid-column: 2;
  grid-row: 1;
  min-height: clamp(14rem, 36vw, 20rem);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-radius: var(--aa-radius-lg);
  border: 1px solid var(--aa-border);
  box-shadow: var(--aa-shadow);
}

/* 背景图片装饰渐变覆盖层 */
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 55%, rgba(255, 255, 255, 0.35));
}

/* 英雄区文字内容 */
.hero-inner {
  position: relative;
  z-index: 2;
  grid-column: 1;
  grid-row: 1;
  max-width: 38rem;
}

/* 英雄区徽章 */
.hero-badge {
  display: inline-block;
  margin-bottom: 0.85rem;
  padding: 0.3rem 0.75rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--aa-accent);
  background: rgba(42, 157, 143, 0.1);
  border: 1px solid rgba(42, 157, 143, 0.22);
  border-radius: var(--aa-radius-pill);
}

/* 英雄区主标题 */
.hero-title {
  margin: 0 0 0.85rem;
  font-size: clamp(1.85rem, 5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--aa-hero-title);
}

/* 英雄区副标题 */
.hero-subtitle {
  margin: 0 0 1.25rem;
  max-width: 38rem;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--aa-hero-subtitle);
}

/* 英雄区元数据 */
.hero-meta {
  margin: 0 0 1.5rem;
  font-size: 0.82rem;
  color: var(--aa-hero-meta);
}

/* 英雄区按钮组 */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

/* 英雄区统计信息 */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 2rem;
}

/* 统计卡片 */
.stat-chip {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.65rem 1rem;
  background: var(--aa-stat-bg);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--aa-stat-border);
  border-radius: var(--aa-radius);
  min-width: 7rem;
  box-shadow: var(--aa-shadow);
}

.stat-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--aa-text-dim);
}

.stat-value {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--aa-text);
}

/* ============================================================
 * 跳转导航 (Jump Nav) — 粘性二级导航
 * ============================================================ */
.jump-nav {
  position: sticky;
  top: var(--aa-header-height);
  z-index: 50;
  margin: 0 -1.25rem 1.75rem;
  padding: 0.65rem 1.25rem;
  background: var(--aa-jump-nav-bg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--aa-border);
  box-shadow: 0 2px 12px rgba(28, 33, 40, 0.04);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.jump-nav::-webkit-scrollbar {
  display: none;
}

.jump-nav-inner {
  display: flex;
  gap: 0.4rem;
  max-width: var(--aa-max-width);
  margin: 0 auto;
  min-width: min-content;
}

.jump-link {
  flex-shrink: 0;
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--aa-text-muted);
  background: var(--aa-surface);
  border: 1px solid var(--aa-border);
  border-radius: var(--aa-radius-pill);
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.jump-link:hover {
  color: var(--aa-accent);
  border-color: var(--aa-accent);
  background: rgba(42, 157, 143, 0.08);
}

/* ============================================================
 * 按钮样式
 * ============================================================ */

/* 主要按钮（渐变背景） */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.25rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--aa-btn-primary-text);
  background: var(--aa-gradient-cta);
  border: none;
  border-radius: var(--aa-radius);
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 4px 16px var(--aa-accent-glow);
  transition: transform 0.15s, box-shadow 0.15s, filter 0.15s;
}

.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--aa-accent-glow);
}

/* 次要按钮（白色边框） */
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.25rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--aa-text);
  background: var(--aa-surface);
  border: 1px solid var(--aa-border-strong);
  border-radius: var(--aa-radius);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn-secondary:hover {
  background: var(--aa-surface-hover);
  border-color: var(--aa-accent);
}

/* 外部链接按钮 */
.btn-external {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.25rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--aa-text);
  background: var(--aa-surface);
  border: 1px solid var(--aa-border-strong);
  border-radius: var(--aa-radius);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn-external:hover {
  background: var(--aa-surface-hover);
  border-color: var(--aa-accent);
}

/* ============================================================
 * 内容区块 (Sections)
 * ============================================================ */
.section {
  margin-bottom: 3rem;
  scroll-margin-top: calc(var(--aa-header-height) + 3.5rem);
}

.section-header {
  margin-bottom: 1.25rem;
}

.section-title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.35rem, 3vw, 1.65rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--aa-text);
}

.section-lead {
  margin: 0;
  max-width: 42rem;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--aa-text-muted);
}

/* ============================================================
 * 资源卡片网格 (Resource Grid)
 * ============================================================ */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
  gap: 0.75rem;
}

.resource-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem;
  background: var(--aa-gradient-card);
  background-color: var(--aa-surface);
  border: 1px solid var(--aa-border);
  border-radius: var(--aa-radius);
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.resource-card:hover {
  transform: translateY(-2px);
  border-color: var(--aa-accent);
  box-shadow: var(--aa-shadow-glow);
}

.resource-icon {
  font-size: 1.35rem;
  line-height: 1;
}

.resource-title {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--aa-text);
}

.resource-desc {
  margin: 0;
  font-size: 0.75rem;
  line-height: 1.45;
  color: var(--aa-text-dim);
}

/* ============================================================
 * 卡片网格 (Card Grid)
 * ============================================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.85rem;
}

.card {
  padding: 1.1rem;
  background: var(--aa-bg-elevated);
  border: 1px solid var(--aa-border);
  border-radius: var(--aa-radius);
  transition: border-color 0.15s;
  text-decoration: none;
  color: inherit;
  display: block;
}

.card:hover {
  border-color: var(--aa-border-strong);
}

.card-title {
  margin: 0 0 0.4rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--aa-text);
}

.card-desc {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.5;
  color: var(--aa-text-muted);
}

/* ============================================================
 * 散文段落和列表
 * ============================================================ */
.prose-para {
  margin: 0 0 0.85rem;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--aa-text-muted);
}

.prose-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.prose-list li {
  position: relative;
  padding: 0.55rem 0 0.55rem 1.35rem;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--aa-text-muted);
  border-bottom: 1px solid var(--aa-border);
}

.prose-list li:last-child {
  border-bottom: none;
}

.prose-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.95rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--aa-purple);
}

/* 内联引导链接 */
.inline-guide-link {
  color: var(--aa-purple);
  font-weight: 600;
  text-decoration: none;
}

.inline-guide-link:hover {
  text-decoration: underline;
}

/* ============================================================
 * 步骤列表（编号步骤）
 * ============================================================ */
.steps-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps-list li {
  counter-increment: step;
  position: relative;
  padding: 1rem 1rem 1rem 3.25rem;
  margin-bottom: 0.65rem;
  background: var(--aa-bg-elevated);
  border: 1px solid var(--aa-border);
  border-radius: var(--aa-radius);
}

.steps-list li::before {
  content: counter(step);
  position: absolute;
  left: 1rem;
  top: 1rem;
  width: 1.65rem;
  height: 1.65rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 800;
  color: #fff;
  background: var(--aa-gradient-cta);
  border-radius: var(--aa-radius-sm);
}

.step-title {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--aa-text);
}

/* ============================================================
 * 面板 (Panel)
 * ============================================================ */
.panel {
  padding: 1.25rem;
  background: var(--aa-surface);
  border: 1px solid var(--aa-border);
  border-radius: var(--aa-radius-lg);
}

/* ============================================================
 * FAQ 列表
 * ============================================================ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.faq-item {
  padding: 1rem 1.15rem;
  background: var(--aa-surface);
  border: 1px solid var(--aa-border);
  border-radius: var(--aa-radius);
}

.faq-q {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--aa-text);
}

.faq-a {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--aa-text-muted);
}

/* ============================================================
 * CTA 横幅
 * ============================================================ */
.cta-band {
  margin-top: 1rem;
  padding: 2rem;
  text-align: center;
  background: var(--aa-gradient-card);
  background-color: var(--aa-surface);
  border: 1px solid var(--aa-border);
  border-radius: var(--aa-radius-lg);
  box-shadow: var(--aa-shadow-glow);
}

.cta-band .section-title {
  margin-bottom: 0.65rem;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
  margin-top: 1.25rem;
}

/* ============================================================
 * 表格样式
 * ============================================================ */
.table-wrap {
  overflow-x: auto;
  margin-top: 1rem;
  border: 1px solid var(--aa-border);
  border-radius: var(--aa-radius-lg);
  background: var(--aa-bg-elevated);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

.data-table th,
.data-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--aa-border);
}

.data-table th {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--aa-text-dim);
  background: var(--aa-surface);
}

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

.data-table tbody tr:hover td {
  background: rgba(42, 157, 143, 0.04);
}

/* ============================================================
 * 时间线样式
 * ============================================================ */
.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline-item {
  position: relative;
  padding: 0 0 1.25rem 1.5rem;
  border-left: 2px solid var(--aa-border-strong);
  margin-left: 0.35rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 0.35rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--aa-purple);
  box-shadow: 0 0 8px var(--aa-accent-glow);
}

.timeline-date {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--aa-accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.timeline-label {
  display: block;
  margin: 0.2rem 0 0.35rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--aa-text);
}

/* ============================================================
 * 页脚 (Footer)
 * ============================================================ */
.site-footer {
  margin-top: auto;
  background: var(--aa-bg-elevated);
  border-top: 1px solid var(--aa-border);
  color: var(--aa-text-muted);
  font-size: 0.84rem;
}

.footer-grid {
  max-width: var(--aa-max-width);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem 2rem;
}

.footer-col h4 {
  margin: 0 0 0.75rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--aa-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-col li {
  margin: 0.4rem 0;
}

.footer-col a {
  color: var(--aa-text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.footer-col a:hover {
  color: var(--aa-accent);
}

.footer-bottom {
  max-width: var(--aa-max-width);
  margin: 0 auto;
  padding: 1rem 1.25rem 1.75rem;
  border-top: 1px solid var(--aa-border);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
}

.footer-legal {
  margin: 0;
  line-height: 1.55;
  max-width: 42rem;
}

.footer-meta {
  margin: 0;
  color: var(--aa-text-dim);
  font-size: 0.75rem;
}

/* ============================================================
 * 子页面英雄区（页面顶部标题区）
 * ============================================================ */
.page-hero {
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding: 2.5rem max(1.25rem, calc(50vw - var(--aa-max-width) / 2 + 1.25rem)) 2rem;
  background: var(--aa-gradient-hero);
  border-bottom: 1px solid var(--aa-border);
}

.page-hero-inner {
  max-width: var(--aa-max-width);
  margin: 0 auto;
}

.page-hero-badge {
  display: inline-block;
  margin-bottom: 0.5rem;
  padding: 0.3rem 0.75rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--aa-accent);
  background: rgba(42, 157, 143, 0.1);
  border: 1px solid rgba(42, 157, 143, 0.22);
  border-radius: var(--aa-radius-pill);
}

.page-title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--aa-text);
}

.page-subtitle {
  margin: 0;
  max-width: 42rem;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--aa-text-muted);
}

/* ============================================================
 * 子页面内容区（用于内部页面）
 * ============================================================ */
.page-content {
  max-width: var(--aa-max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.page-content .section {
  margin-bottom: 2rem;
}

/* ============================================================
 * 徽章样式
 * ============================================================ */
.badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--aa-radius-sm);
}

.badge-new {
  color: #fff;
  background: var(--aa-badge-new);
}

.badge-active {
  color: #fff;
  background: var(--aa-badge-active);
}

/* ============================================================
 * 响应式布局
 * ============================================================ */
@media (max-width: 900px) {
  .main-nav {
    display: none;
  }
  .menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 1.25rem;
    min-height: auto;
    padding-top: 1.5rem;
    padding-bottom: 2rem;
  }
  .hero .hero-inner {
    grid-column: 1;
    grid-row: 1;
    max-width: none;
  }
  .hero .hero-bg {
    grid-column: 1;
    grid-row: 2;
    min-height: clamp(12rem, 42vw, 16rem);
  }
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }
  .stat-chip {
    min-width: 0;
  }
}

@media (max-width: 640px) {
  .content-wrap {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .jump-nav {
    margin-left: -1rem;
    margin-right: -1rem;
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions a {
    width: 100%;
    text-align: center;
  }
  .resource-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .card-grid {
    grid-template-columns: 1fr;
  }
  .cta-band {
    padding: 1.5rem 1rem;
  }
}

/* ============================================================
 * 帮助类
 * ============================================================ */
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.text-center { text-align: center; }
.text-dim { color: var(--aa-text-dim); }
.text-muted { color: var(--aa-text-muted); }

/* ============================================================
 * 地图页面特殊样式 — 验证隐藏点样式
 * ============================================================ */
.spot-card {
  padding: 1rem;
  background: var(--aa-surface);
  border: 1px solid var(--aa-border);
  border-radius: var(--aa-radius);
  margin-bottom: 0.5rem;
}

.spot-card h3 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--aa-text);
}

.spot-card p {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.5;
  color: var(--aa-text-muted);
}

/* ============================================================
 * 颜色匹配训练器 (Color Match Trainer) 特殊样式
 * ============================================================ */
.trainer-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 600px;
  margin: 0 auto;
}

.color-swatch {
  width: 100%;
  height: 8rem;
  border-radius: var(--aa-radius);
  border: 2px solid var(--aa-border);
}

.color-picker-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.color-option {
  width: 3rem;
  height: 3rem;
  border-radius: var(--aa-radius-sm);
  border: 2px solid var(--aa-border);
  cursor: pointer;
  transition: transform 0.1s, border-color 0.1s;
}

.color-option:hover {
  transform: scale(1.1);
  border-color: var(--aa-accent);
}

.feedback {
  padding: 0.75rem 1rem;
  border-radius: var(--aa-radius);
  font-weight: 600;
  text-align: center;
}

.feedback-correct {
  background: rgba(42, 157, 143, 0.12);
  color: var(--aa-accent);
}

.feedback-wrong {
  background: rgba(231, 111, 81, 0.12);
  color: var(--aa-roblox-red);
}