/* ==========================================================================
   悠兔机场 (youtuyun.lat) - 奢华航旅贵宾室与停机坪全景视觉系统
   Mid-century Modern First-Class Airport Lounge & Nocturnal Tarmac Paradigm
   ========================================================================== */

:root {
  /* 核心尊享色调 (中世纪现代奢华机库与贵宾室) */
  --walnut-deep: #1a100b;
  --walnut-rich: #281912;
  --walnut-light: #3e271c;
  --emerald-deep: #082219;
  --emerald-rich: #0f382a;
  --emerald-accent: #195b44;
  --brass-dark: #997136;
  --brass-warm: #d4a359;
  --brass-light: #f3cf8a;
  --brass-glow: rgba(212, 163, 89, 0.28);
  --charcoal-rain: #101418;
  --charcoal-glass: rgba(16, 20, 24, 0.72);

  /* 默认：白天奢华复古光照模式 (Daylight First-Class Lounge) */
  --bg-body: #f7f4ee;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #fdfbf7;
  --bg-surface-subtle: #efebe2;
  --bg-window-frame: #2c1c14;
  --bg-glass: rgba(247, 244, 238, 0.88);
  --bg-glass-card: rgba(255, 255, 255, 0.85);

  --text-main: #241812;
  --text-secondary: #5a4b41;
  --text-muted: #8c7c71;
  --text-inverse: #fdfaf5;
  --text-brass: #b8863b;

  --border-color: #e2dbcd;
  --border-color-subtle: #ede6d8;
  --border-brass: #d4a359;
  --border-glass: rgba(212, 163, 89, 0.35);

  --shadow-sm: 0 2px 6px rgba(44, 28, 20, 0.06);
  --shadow-md: 0 8px 24px -4px rgba(44, 28, 20, 0.1);
  --shadow-lg: 0 20px 48px -8px rgba(44, 28, 20, 0.18);
  --shadow-brass: 0 0 20px rgba(212, 163, 89, 0.22);

  --badge-bg: rgba(212, 163, 89, 0.12);
  --badge-text: #946824;
  --badge-border: rgba(212, 163, 89, 0.4);

  --tarmac-gradient: radial-gradient(circle at 50% 20%, rgba(212, 163, 89, 0.08) 0%, transparent 70%),
                     linear-gradient(180deg, #f7f4ee 0%, #efebe2 100%);

  /* 结构度量 */
  --max-width: 1240px;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-smooth: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
  --transition-theme: background 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}

/* 夜幕全景机坪深邃模式 (Nocturnal Tarmac Mode) */
[data-theme="dark"] {
  --bg-body: #0d1117;
  --bg-surface: #141a22;
  --bg-surface-elevated: #1b232e;
  --bg-surface-subtle: #0f141c;
  --bg-window-frame: #1b120c;
  --bg-glass: rgba(13, 17, 23, 0.88);
  --bg-glass-card: rgba(20, 26, 34, 0.82);

  --text-main: #f5efe6;
  --text-secondary: #b5aba0;
  --text-muted: #786f66;
  --text-inverse: #101418;
  --text-brass: #e4b975;

  --border-color: #27313f;
  --border-color-subtle: #1c242f;
  --border-brass: #b8863b;
  --border-glass: rgba(212, 163, 89, 0.25);

  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 28px -4px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 24px 50px -8px rgba(0, 0, 0, 0.8);
  --shadow-brass: 0 0 24px rgba(212, 163, 89, 0.35);

  --badge-bg: rgba(212, 163, 89, 0.16);
  --badge-text: #f0caa1;
  --badge-border: rgba(212, 163, 89, 0.45);

  --tarmac-gradient: radial-gradient(circle at 50% 15%, rgba(212, 163, 89, 0.12) 0%, transparent 65%),
                     linear-gradient(180deg, #0d1117 0%, #080b0f 100%);
}

/* 基础重置与中世纪字体质感 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "Hiragino Sans GB", "Microsoft YaHei", serif;
  font-size: 16px;
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg-body);
  color: var(--text-main);
  transition: var(--transition-theme);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
}

/* 黄铜铭牌与排版装饰 */
.brass-text {
  color: var(--text-brass);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.brass-gradient-text {
  background: linear-gradient(135deg, var(--brass-light) 0%, var(--brass-warm) 60%, var(--brass-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.wood-accent-line {
  height: 2px;
  width: 60px;
  background: linear-gradient(90deg, var(--brass-warm), transparent);
  margin: 12px 0 20px;
}

/* ==========================================================================
   页眉导航 (Header & Brass Navigation)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--bg-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-theme);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-main);
}

.brand-seal {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--walnut-deep) 0%, var(--walnut-rich) 100%);
  border: 1.5px solid var(--brass-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brass-warm);
  box-shadow: 0 4px 12px rgba(40, 25, 18, 0.4);
  position: relative;
  overflow: hidden;
}

.brand-seal::after {
  content: '';
  position: absolute;
  inset: 2px;
  border: 1px dashed rgba(212, 163, 89, 0.4);
  border-radius: 6px;
  pointer-events: none;
}

.brand-meta-badge {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--brass-warm);
  display: block;
  line-height: 1;
  margin-top: 2px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
}

.nav-link {
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 4px;
  letter-spacing: 0.02em;
}

.nav-link:hover, .nav-link.active {
  color: var(--brass-warm);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brass-warm), var(--brass-light));
  transition: width 0.28s ease, left 0.28s ease;
  border-radius: 2px;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
  left: 0;
}

/* 导航高亮项：推荐资讯 */
.nav-link-highlight {
  color: var(--brass-warm) !important;
  font-weight: 700;
}

.nav-link-highlight::before {
  content: '★';
  font-size: 0.65rem;
  margin-right: 4px;
  color: var(--brass-warm);
  vertical-align: middle;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 精致专业黄铜昼夜切换按钮 (Heavy Brass Rotary Switch Aesthetic) */
.theme-toggle-btn {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(212, 163, 89, 0.12) 0%, rgba(40, 25, 18, 0.12) 100%);
  border: 1.5px solid var(--brass-warm);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brass-warm);
  transition: var(--transition-smooth);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  padding: 0;
}

.theme-toggle-btn:hover {
  transform: rotate(30deg) scale(1.05);
  box-shadow: 0 0 16px var(--brass-glow);
  border-color: var(--brass-light);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
}

.icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.icon-moon {
  position: absolute;
  opacity: 0;
  transform: rotate(120deg) scale(0.6);
}

[data-theme="dark"] .icon-sun {
  opacity: 0;
  transform: rotate(-120deg) scale(0.6);
}

[data-theme="dark"] .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* 移动端汉堡切换按钮 */
.mobile-toggle-btn {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  cursor: pointer;
  color: var(--text-main);
  align-items: center;
  justify-content: center;
  padding: 0;
}

/* ==========================================================================
   按钮规范 (Luxury First-Class Buttons)
   严格遵守 target="_blank" rel="nofollow"
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 26px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition-smooth);
  white-space: nowrap;
  user-select: none;
  position: relative;
  text-transform: uppercase;
}

.btn-brass-primary {
  background: linear-gradient(135deg, #d4a359 0%, #aa7e38 100%);
  color: #1a100b !important;
  border: 1px solid #f3cf8a;
  box-shadow: 0 4px 14px rgba(170, 126, 56, 0.35);
}

.btn-brass-primary:hover {
  background: linear-gradient(135deg, #f3cf8a 0%, #d4a359 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 163, 89, 0.45);
}

.btn-emerald-secondary {
  background: linear-gradient(135deg, var(--emerald-rich) 0%, var(--emerald-deep) 100%);
  color: #f7f4ee !important;
  border: 1px solid rgba(212, 163, 89, 0.5);
  box-shadow: 0 4px 14px rgba(8, 34, 25, 0.3);
}

.btn-emerald-secondary:hover {
  background: linear-gradient(135deg, var(--emerald-accent) 0%, var(--emerald-rich) 100%);
  border-color: var(--brass-light);
  transform: translateY(-2px);
}

.btn-wood-outline {
  background: rgba(44, 28, 20, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-wood-outline:hover {
  border-color: var(--brass-warm);
  color: var(--brass-warm);
  background: rgba(212, 163, 89, 0.08);
  transform: translateY(-2px);
}

.btn-sm {
  min-height: 40px;
  padding: 0 18px;
  font-size: 0.86rem;
}

.btn-lg {
  min-height: 52px;
  padding: 0 32px;
  font-size: 1.02rem;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   全景机坪雨丝观景窗主视觉 (Hero VIP Lounge & Rain Tarmac Glass)
   ========================================================================== */
.hero-lounge-window {
  position: relative;
  padding: 70px 0 80px;
  background: var(--tarmac-gradient);
  border-bottom: 2px solid var(--border-color);
  overflow: hidden;
}

/* 雨丝雨滴与擦拭图层 Canvas */
#rain-wiper-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: auto;
  z-index: 1;
}

/* 停机坪跑道流光与远端灯柱脉冲指示灯 */
.tarmac-runway-lights {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 140px;
  background: linear-gradient(180deg, transparent 0%, rgba(212, 163, 89, 0.06) 100%);
  pointer-events: none;
  z-index: 1;
}

.runway-guidance-line {
  position: absolute;
  bottom: 24px;
  left: 5%;
  right: 5%;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--brass-warm) 0, var(--brass-warm) 12px, transparent 12px, transparent 36px);
  opacity: 0.6;
  animation: runway-glow 3.5s infinite ease-in-out;
}

@keyframes runway-glow {
  0%, 100% { opacity: 0.3; filter: drop-shadow(0 0 2px var(--brass-warm)); }
  50% { opacity: 0.9; filter: drop-shadow(0 0 10px var(--brass-light)); }
}

.hero-content-layer {
  position: relative;
  z-index: 2;
  pointer-events: none; /* 让鼠标手势能够穿透到雨滴画布进行擦拭 */
}

.hero-content-layer * {
  pointer-events: auto; /* 子元素正常交互 */
}

.lounge-badge-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
}

.lounge-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  border: 1px solid var(--brass-warm);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-brass);
}

.status-beacon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brass-warm);
  box-shadow: 0 0 0 0 rgba(212, 163, 89, 0.7);
  animation: beacon-pulse 2s infinite cubic-bezier(0.4, 0, 0.6, 1);
}

@keyframes beacon-pulse {
  0% { box-shadow: 0 0 0 0 rgba(212, 163, 89, 0.8); }
  70% { box-shadow: 0 0 0 10px rgba(212, 163, 89, 0); }
  100% { box-shadow: 0 0 0 0 rgba(212, 163, 89, 0); }
}

.hero-main-title {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: 22px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.hero-description-prose {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 800px;
  margin: 0 auto 38px;
  text-align: center;
  font-weight: 400;
}

.hero-actions-cluster {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

/* ==========================================================================
   全景窗台建筑构型 (Mid-century Lounge Window: Plaque & Telemetry Table)
   ========================================================================== */
.lounge-window-console {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-lg);
  position: relative;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.lounge-window-console::before {
  content: 'FIRST CLASS DECK · TARMAC VIEW OBSERVATION';
  position: absolute;
  top: -11px;
  left: 28px;
  background: var(--walnut-deep);
  color: var(--brass-light);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  padding: 2px 14px;
  border-radius: 4px;
  border: 1px solid var(--brass-warm);
}

/* 左侧：黄铜航班离港时刻看板 (Brass Flight Departure Plaque) */
.departure-plaque {
  background: linear-gradient(180deg, rgba(40, 25, 18, 0.05) 0%, rgba(40, 25, 18, 0.12) 100%);
  border: 1.5px solid var(--border-brass);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
}

.plaque-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 14px;
  margin-bottom: 16px;
}

.plaque-title {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text-brass);
  display: flex;
  align-items: center;
  gap: 8px;
}

.plaque-clock {
  font-family: "Courier New", Courier, monospace;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-main);
  background: var(--bg-surface-subtle);
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.flight-routes-table {
  width: 100%;
  border-collapse: collapse;
}

.flight-routes-table th {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-color);
}

.flight-route-row {
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
}

.flight-route-row:hover {
  background: rgba(212, 163, 89, 0.12);
}

.flight-route-row td {
  padding: 12px 10px;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--border-color-subtle);
  color: var(--text-main);
}

.flight-code {
  font-family: monospace;
  font-weight: 700;
  color: var(--brass-warm);
}

.flight-status-on-time {
  color: #10b981;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.flight-status-on-time::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
}

/* 奢华行李登机吊牌浮层 (Luxury Luggage Pass / Boarding Badge Tooltip) */
.luggage-badge-preview {
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%) translateX(10px);
  background: #fffdf9;
  color: #241812;
  border: 1.5px solid var(--brass-warm);
  border-radius: 6px;
  padding: 10px 14px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
  font-size: 0.78rem;
  line-height: 1.4;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 50;
  width: 220px;
}

.luggage-badge-preview::before {
  content: '🏷️ VIP PASS';
  display: block;
  font-size: 0.68rem;
  font-weight: 800;
  color: #946824;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.flight-route-row:hover .luggage-badge-preview {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* 右侧：极简茶几与实时遥测台 (Telemetry Side-Table) */
.telemetry-side-table {
  background: var(--bg-surface-elevated);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.telemetry-header h3 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

.telemetry-header p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.telemetry-gauges-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 20px 0;
}

.gauge-cell {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px;
  text-align: center;
}

.gauge-val {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--text-brass);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.gauge-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 4px;
}

.wiper-hint {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(212, 163, 89, 0.1);
  border: 1px dashed var(--brass-warm);
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--text-brass);
}

.wiper-hint svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  stroke: var(--brass-warm);
}

/* ==========================================================================
   板块通用中世纪建筑构架 (Section Architecture)
   ========================================================================== */
.section {
  padding: 96px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-surface-subtle);
  transition: var(--transition-theme);
}

.section-head-frame {
  margin-bottom: 56px;
  text-align: center;
}

.section-salute {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-brass);
  margin-bottom: 10px;
}

.section-headline {
  font-size: clamp(2rem, 3.5vw, 2.7rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  color: var(--text-main);
}

.section-prose {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 660px;
  margin: 0 auto;
}

/* ==========================================================================
   产品核心优势：中世纪现代实木与黄铜建筑窗格 (3 Core Advantages)
   ========================================================================== */
.features-window-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-window-card {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.feature-window-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brass-warm), var(--brass-light));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-window-card:hover {
  transform: translateY(-8px);
  border-color: var(--brass-warm);
  box-shadow: var(--shadow-lg), var(--shadow-brass);
}

.feature-window-card:hover::before {
  opacity: 1;
}

.feature-brass-icon {
  width: 58px;
  height: 58px;
  border-radius: 12px;
  background: var(--badge-bg);
  border: 1.5px solid var(--brass-warm);
  color: var(--brass-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: var(--transition-smooth);
}

.feature-window-card:hover .feature-brass-icon {
  background: var(--brass-warm);
  color: #1a100b;
  transform: scale(1.06);
}

.feature-heading {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-main);
}

.feature-body {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-bullet-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px dashed var(--border-color);
}

.feature-bullet-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.feature-bullet-item svg {
  width: 16px;
  height: 16px;
  stroke: var(--brass-warm);
  stroke-width: 2.5;
  fill: none;
  flex-shrink: 0;
}

/* ==========================================================================
   流媒体娱乐舱与重型黄铜机械旋钮 (In-Flight Streaming & Rotary AI Suite)
   ========================================================================== */
.rotary-suite-container {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.brass-rotary-controller {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 10px 24px;
  max-width: 540px;
  margin: 0 auto;
  box-shadow: var(--shadow-sm);
}

.rotary-label {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.rotary-knob-wrap {
  display: flex;
  gap: 8px;
}

.rotary-option-btn {
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  padding: 8px 20px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.rotary-option-btn:hover {
  color: var(--brass-warm);
}

.rotary-option-btn.active {
  background: linear-gradient(135deg, var(--brass-warm) 0%, var(--brass-dark) 100%);
  color: #1a100b;
  border-color: var(--brass-light);
  box-shadow: 0 2px 10px rgba(212, 163, 89, 0.4);
}

.dual-capability-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.capability-window-box {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

.capability-window-box:hover {
  border-color: var(--brass-warm);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.capability-banner {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.capability-emblem {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(212, 163, 89, 0.15) 0%, rgba(15, 56, 42, 0.15) 100%);
  border: 1px solid var(--brass-warm);
  color: var(--brass-warm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.capability-banner h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
}

.capability-banner p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.lounge-tags-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0;
}

.lounge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 6px;
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-color);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  transition: var(--transition-smooth);
}

.lounge-tag:hover {
  border-color: var(--brass-warm);
  background: var(--bg-surface-elevated);
  transform: scale(1.02);
}

.brass-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brass-warm);
}

.telemetry-status-strip {
  margin-top: auto;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-subtle);
  border-left: 3px solid var(--brass-warm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.86rem;
}

/* ==========================================================================
   套餐价格对比表：参考网上真实机场套餐定价 (Pricing Section)
   ========================================================================== */
.pricing-lounge-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-ticket-card {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 34px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
}

.pricing-ticket-card:hover {
  transform: translateY(-8px);
  border-color: var(--brass-warm);
  box-shadow: var(--shadow-lg), var(--shadow-brass);
}

.pricing-ticket-card.flagship-hot {
  border-color: var(--brass-warm);
  background: linear-gradient(180deg, var(--bg-surface) 0%, rgba(212, 163, 89, 0.05) 100%);
  box-shadow: 0 10px 32px rgba(212, 163, 89, 0.25);
}

.ticket-pennant {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--brass-warm) 0%, var(--brass-dark) 100%);
  color: #1a100b;
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--brass-light);
  box-shadow: 0 4px 12px rgba(170, 126, 56, 0.35);
  white-space: nowrap;
}

.ticket-class-name {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--text-main);
}

.ticket-class-sub {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.fare-rate-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-color);
}

.fare-currency {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--brass-warm);
}

.fare-amount {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.02em;
  line-height: 1;
}

.fare-interval {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

.ticket-privileges-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.ticket-privilege-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.ticket-privilege-item svg {
  width: 17px;
  height: 17px;
  stroke: var(--brass-warm);
  stroke-width: 2.4;
  fill: none;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   贵宾常旅客评价簿 (VIP Guestbook / Testimonials)
   ========================================================================== */
.guestbook-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.guestbook-card {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.guestbook-card:hover {
  transform: translateY(-6px);
  border-color: var(--brass-warm);
  box-shadow: var(--shadow-md);
}

.guestbook-wax-seal {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-brass);
}

.guestbook-prose {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
}

.guestbook-signoff {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px dashed var(--border-color);
  padding-top: 18px;
}

.passenger-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--badge-bg);
  border: 1.5px solid var(--brass-warm);
  color: var(--text-brass);
  font-weight: 800;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.passenger-meta h4 {
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--text-main);
}

.passenger-meta p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   常见问题解答手风琴 (FAQ)
   ========================================================================== */
.faq-box-wrap {
  max-width: 860px;
  margin: 0 auto;
}

.faq-deck {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-row {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.faq-row:hover {
  border-color: var(--brass-warm);
}

.faq-trigger {
  width: 100%;
  background: none;
  border: none;
  outline: none;
  padding: 22px 26px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  transition: var(--transition-smooth);
}

.faq-brass-arrow {
  width: 20px;
  height: 20px;
  stroke: var(--text-brass);
  stroke-width: 2.2;
  fill: none;
  transition: transform 0.35s ease;
  flex-shrink: 0;
}

.faq-row.active .faq-brass-arrow {
  transform: rotate(180deg);
}

.faq-drawer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.38s ease, padding 0.38s ease;
  padding: 0 26px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.75;
}

.faq-row.active .faq-drawer {
  max-height: 320px;
  padding: 0 26px 24px;
}

/* 底部行动召唤航旅标牌 (VIP Boarding Banner) */
.lounge-cta-chamber {
  background: linear-gradient(135deg, var(--walnut-deep) 0%, var(--emerald-deep) 100%);
  border: 2px solid var(--brass-warm);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  color: #f7f4ee;
  margin-top: 50px;
  box-shadow: 0 20px 48px rgba(26, 16, 11, 0.45);
  position: relative;
  overflow: hidden;
}

.lounge-cta-chamber::after {
  content: '';
  position: absolute;
  inset: 6px;
  border: 1px dashed rgba(212, 163, 89, 0.35);
  border-radius: calc(var(--radius-lg) - 6px);
  pointer-events: none;
}

.lounge-cta-chamber h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 900;
  margin-bottom: 14px;
}

.lounge-cta-chamber p {
  font-size: 1.05rem;
  color: #d1c8bd;
  max-width: 600px;
  margin: 0 auto 30px;
}

/* ==========================================================================
   页脚规范 (Site Footer)
   严格遵守只保留这四个标题，内容打开新的页面展示
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background: var(--bg-surface);
  border-top: 2px solid var(--border-color);
  padding: 56px 0 38px;
  transition: var(--transition-theme);
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  list-style: none;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.footer-link {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: var(--transition-smooth);
}

.footer-link:hover {
  color: var(--brass-warm);
  border-color: var(--border-brass);
  background: rgba(212, 163, 89, 0.08);
}

.footer-copyright {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   副页面与文章资讯专用样式 (Article & Insights)
   ========================================================================== */
.page-header {
  padding: 64px 0 40px;
  background: var(--tarmac-gradient);
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 48px;
}

.page-header h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 900;
  margin-bottom: 12px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 640px;
}

.page-content-box {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 50px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 60px;
}

.prose {
  color: var(--text-secondary);
  line-height: 1.85;
  font-size: 1rem;
}

.prose h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 38px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.prose h2:first-of-type {
  margin-top: 0;
}

.prose h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 24px 0 12px;
}

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

.prose ul, .prose ol {
  margin-bottom: 22px;
  padding-left: 24px;
}

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

.prose .callout {
  padding: 22px;
  border-radius: var(--radius-md);
  background: rgba(212, 163, 89, 0.08);
  border-left: 4px solid var(--brass-warm);
  margin: 26px 0;
  color: var(--text-main);
}

.prose .callout-danger {
  background: rgba(239, 68, 68, 0.08);
  border-left-color: #ef4444;
}

/* 资讯专栏卡片网格 */
.insights-feed-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.insight-article-card {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

.insight-article-card:hover {
  border-color: var(--brass-warm);
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.insight-card-meta {
  font-size: 0.8rem;
  color: var(--text-brass);
  font-weight: 700;
  margin-bottom: 12px;
}

.insight-card-title {
  font-size: 1.22rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.4;
}

.insight-card-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.insight-read-link {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--brass-warm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.insight-read-link:hover {
  color: var(--brass-light);
  transform: translateX(4px);
}

/* 网站地图样式 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.sitemap-card {
  background: var(--bg-surface-subtle);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
}

.sitemap-card h3 {
  font-size: 1.18rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.sitemap-list a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.sitemap-list a:hover {
  color: var(--brass-warm);
  transform: translateX(4px);
}

/* ==========================================================================
   全响应式断点适配 (@media)
   确保手机端单栏完美显示，触摸黄金尺寸 >= 48px
   ========================================================================== */
@media (max-width: 1100px) {
  .pricing-lounge-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .lounge-window-console {
    grid-template-columns: 1fr;
    padding: 22px;
  }

  .dual-capability-panels {
    grid-template-columns: 1fr;
  }

  .insights-feed-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header-container {
    height: 68px;
  }

  .nav-menu {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 2px solid var(--border-color);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    display: none;
    box-shadow: var(--shadow-lg);
  }

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

  .mobile-toggle-btn {
    display: flex;
  }

  .hero-lounge-window {
    padding: 44px 0 40px;
  }

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

  .hero-actions-cluster .btn {
    width: 100%;
  }

  .features-window-grid,
  .guestbook-grid,
  .sitemap-grid,
  .pricing-lounge-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .section {
    padding: 60px 0;
  }

  .footer-nav {
    flex-direction: column;
    gap: 14px;
  }

  .page-content-box {
    padding: 28px 18px;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .btn {
    min-height: 48px;
    padding: 0 20px;
  }

  .fare-amount {
    font-size: 2.1rem;
  }
}

/* ==========================================================================
   SEO 深度科普文章排版专用体系 (Table of Contents, Article Body, FAQ, Related)
   ========================================================================== */
.article-hero {
  padding: 60px 0 36px;
  background: var(--tarmac-gradient);
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 40px;
}

.article-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.article-breadcrumbs a {
  color: var(--text-brass);
}

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

.article-main-title {
  font-size: clamp(1.8rem, 3.6vw, 2.7rem);
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border-color);
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 目录盒子 (Table of Contents) */
.toc-box {
  background: var(--bg-surface-subtle);
  border: 1.5px solid var(--border-color);
  border-left: 4px solid var(--brass-warm);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin: 30px 0 40px;
}

.toc-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 0;
  margin-bottom: 0;
}

.toc-list li a {
  color: var(--text-secondary);
  font-size: 0.94rem;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  transition: var(--transition-smooth);
}

.toc-list li a:hover {
  color: var(--brass-warm);
  transform: translateX(4px);
}

.toc-list .toc-sub {
  padding-left: 20px;
  font-size: 0.88rem;
}

/* 文章正文段落与表格 */
.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 44px 0 18px;
  padding-bottom: 12px;
  border-bottom: 1.5px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h3 {
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 28px 0 14px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 26px;
}

.article-body li {
  margin-bottom: 10px;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 26px 0;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.94rem;
}

.article-table th {
  background: var(--bg-surface-subtle);
  color: var(--text-main);
  font-weight: 800;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  text-align: left;
}

.article-table td {
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.article-table tr:hover td {
  background: rgba(212, 163, 89, 0.05);
}

/* 文章内专属 CTA 转化卡片 */
.article-cta-box {
  background: linear-gradient(135deg, var(--walnut-deep) 0%, var(--emerald-deep) 100%);
  border: 2px solid var(--brass-warm);
  border-radius: var(--radius-md);
  padding: 32px;
  color: #f7f4ee;
  margin: 44px 0;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.article-cta-box h3 {
  color: #fff;
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.article-cta-box p {
  color: #e2dbcd;
  font-size: 0.98rem;
  max-width: 580px;
  margin: 0 auto 22px;
}

/* 文章内专属 FAQ 列表 */
.article-faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 28px 0;
}

.article-faq-item {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
}

.article-faq-q {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.article-faq-q::before {
  content: 'Q:';
  color: var(--brass-warm);
  font-weight: 900;
}

.article-faq-a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 相关阅读模块 */
.related-posts-section {
  margin-top: 54px;
  padding-top: 36px;
  border-top: 2px dashed var(--border-color);
}

.related-posts-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-post-card {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

.related-post-card:hover {
  border-color: var(--brass-warm);
  background: var(--bg-surface);
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.related-post-card h4 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.45;
}

.related-post-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex-grow: 1;
}

.related-post-card .read-link {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--brass-warm);
  margin-top: 12px;
}

@media (max-width: 768px) {
  .related-posts-grid {
    grid-template-columns: 1fr;
  }
}