/* ==========================================================================
   魔戒机场 - 极光夜空流（Nordic Aurora / Ethereal Glow）2.0 新型非对称版式系统
   主调：#0D1117（暗夜天幕）
   光晕渐变 1：#10B981（极光翠绿）
   光晕渐变 2：#6366F1（冷调天青靛蓝）
   按钮/高亮：#2DD4BF（荧光薄荷青）
   文字色彩：#F1F5F9（白）、#94A3B8（淡夜灰）
   ========================================================================== */

:root {
  --bg-dark: #0D1117;
  --bg-deep: #080C10;
  --bg-surface: rgba(18, 24, 34, 0.72);
  --bg-surface-elevated: rgba(26, 34, 48, 0.85);
  --bg-glass-card: rgba(16, 22, 32, 0.65);
  --bg-glass-highlight: rgba(45, 212, 191, 0.08);

  --aurora-green: #10B981;
  --aurora-indigo: #6366F1;
  --accent-cyan: #2DD4BF;
  --accent-cyan-light: #5eead4;
  --accent-cyan-glow: rgba(45, 212, 191, 0.35);

  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-accent: #2DD4BF;

  --border-glass: rgba(255, 255, 255, 0.07);
  --border-glass-light: rgba(255, 255, 255, 0.14);
  --border-accent: rgba(45, 212, 191, 0.3);
  --border-glow: rgba(99, 102, 241, 0.35);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition: all 0.32s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 极光背景画布 */
#aurora-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.9;
}

/* 氛围光晕层 */
.ambient-glow-1 {
  position: fixed;
  top: -10%;
  left: 10%;
  width: 800px;
  height: 600px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.18) 0%, rgba(13, 17, 23, 0) 70%);
  filter: blur(100px);
  z-index: 0;
  pointer-events: none;
  animation: pulseGlow 16s ease-in-out infinite alternate;
}

.ambient-glow-2 {
  position: fixed;
  top: 30%;
  right: -8%;
  width: 850px;
  height: 700px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.22) 0%, rgba(13, 17, 23, 0) 70%);
  filter: blur(110px);
  z-index: 0;
  pointer-events: none;
  animation: floatGlow 20s ease-in-out infinite alternate;
}

.ambient-glow-3 {
  position: fixed;
  bottom: -5%;
  left: 20%;
  width: 750px;
  height: 500px;
  background: radial-gradient(circle, rgba(45, 212, 191, 0.15) 0%, rgba(13, 17, 23, 0) 70%);
  filter: blur(95px);
  z-index: 0;
  pointer-events: none;
}

@keyframes pulseGlow {
  0% { transform: scale(1) translate(0, 0); opacity: 0.6; }
  100% { transform: scale(1.15) translate(40px, 30px); opacity: 0.9; }
}

@keyframes floatGlow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-60px, 45px) scale(1.12); }
}

/* 全局容器 */
.app-container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 1260px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部浮动磨砂导航栏 */
.navbar {
  position: sticky;
  top: 16px;
  z-index: 100;
  margin: 0 auto;
  max-width: 1260px;
  width: calc(100% - 32px);
  padding: 0 16px;
  background: rgba(13, 17, 23, 0.82);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-glass-light);
  border-radius: 20px;
  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.45);
  transition: var(--transition);
}

.navbar .nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  padding: 0 12px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
}

.brand-logo .logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--aurora-green), var(--aurora-indigo));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 18px var(--accent-cyan-glow);
  position: relative;
}

.brand-logo .logo-icon svg {
  width: 22px;
  height: 22px;
  fill: #fff;
}

.brand-title {
  display: flex;
  flex-direction: column;
}

.brand-title .title-text {
  font-size: 1.18rem;
  font-weight: 800;
  background: linear-gradient(90deg, #F1F5F9 20%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.brand-title .subtitle-badge {
  font-size: 0.65rem;
  color: var(--accent-cyan);
  letter-spacing: 0.12em;
  font-weight: 700;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition);
  padding: 8px 12px;
  border-radius: 8px;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-cta-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 12px;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #059669 100%);
  color: #032b27;
  box-shadow: 0 4px 18px rgba(45, 212, 191, 0.35);
  font-weight: 700;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(45, 212, 191, 0.55);
  background: linear-gradient(135deg, #5eead4 0%, #10b981 100%);
  color: #011b19;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass-light);
  color: var(--text-primary);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  color: var(--accent-cyan);
}

.btn-glow-aurora {
  background: linear-gradient(135deg, var(--aurora-green) 0%, var(--aurora-indigo) 100%);
  color: #ffffff;
  box-shadow: 0 4px 22px rgba(99, 102, 241, 0.45);
}

.btn-glow-aurora:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(16, 185, 129, 0.55);
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   1. 非对称驾驶舱 Hero 板块 (Bento Hero Cockpit)
   ========================================================================== */
.hero-cockpit {
  padding: 60px 0 70px;
  position: relative;
}

.hero-bento-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 32px;
  align-items: center;
}

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

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(45, 212, 191, 0.1);
  border: 1px solid rgba(45, 212, 191, 0.25);
  border-radius: 999px;
  font-size: 0.84rem;
  color: var(--accent-cyan);
  font-weight: 600;
  width: fit-content;
  backdrop-filter: blur(10px);
}

.hero-pill-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: blinkDot 1.6s infinite ease-in-out;
}

@keyframes blinkDot {
  0%, 100% { opacity: 0.4; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.2); }
}

.hero-title {
  font-size: 3.3rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.03em;
}

.hero-title .text-aurora {
  background: linear-gradient(120deg, #F1F5F9 10%, var(--accent-cyan) 50%, #818CF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.12rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.hero-subtitle strong {
  color: var(--text-primary);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 8px;
  flex-wrap: wrap;
}

/* 核心特性标签胶囊 */
.hero-tag-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

.hero-tag-pills .tag-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--border-glass);
  padding: 6px 13px;
  border-radius: 10px;
  font-size: 0.83rem;
  color: var(--text-secondary);
}

.hero-tag-pills .tag-pill svg {
  color: var(--accent-cyan);
  width: 15px;
  height: 15px;
}

/* 右侧控制台仪表视窗 (Live Cockpit Console) */
.hero-console-card {
  background: linear-gradient(160deg, rgba(22, 28, 40, 0.85) 0%, rgba(13, 17, 23, 0.95) 100%);
  border: 1px solid var(--border-glass-light);
  border-radius: 24px;
  padding: 26px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), inset 0 1px 1px rgba(255, 255, 255, 0.12);
  position: relative;
  overflow: hidden;
}

.hero-console-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--aurora-green), var(--accent-cyan), var(--aurora-indigo));
}

.console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-glass);
  margin-bottom: 20px;
}

.console-window-dots {
  display: flex;
  gap: 7px;
}

.console-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.console-dot.red { background: #ef4444; }
.console-dot.yellow { background: #f59e0b; }
.console-dot.green { background: #10b981; }

.console-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.console-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 20px;
}

.console-stat-box {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  padding: 14px 16px;
}

.console-stat-label {
  font-size: 0.76rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 4px;
  letter-spacing: 0.05em;
}

.console-stat-value {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.console-stat-value .unit {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.console-graph-visual {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 18px;
}

.graph-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.graph-wave-bars {
  display: flex;
  align-items: flex-end;
  height: 48px;
  gap: 5px;
}

.wave-bar {
  flex: 1;
  background: linear-gradient(180deg, var(--accent-cyan), var(--aurora-indigo));
  border-radius: 3px 3px 0 0;
  animation: equalize 2s infinite ease-in-out alternate;
}

@keyframes equalize {
  0% { transform: scaleY(0.3); }
  50% { transform: scaleY(0.9); }
  100% { transform: scaleY(0.5); }
}

.console-footer-quickstart {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quickstart-link-box {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.035);
  border: 1px dashed var(--border-accent);
  border-radius: 10px;
  padding: 8px 12px;
  justify-content: space-between;
}

.quickstart-text {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-family: monospace;
}

.quickstart-copy-btn {
  background: rgba(45, 212, 191, 0.15);
  border: 1px solid rgba(45, 212, 191, 0.3);
  color: var(--accent-cyan);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
}

.quickstart-copy-btn:hover {
  background: var(--accent-cyan);
  color: #042f2e;
}

/* ==========================================================================
   板块公用标题
   ========================================================================== */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent-cyan);
  background: rgba(45, 212, 191, 0.08);
  padding: 4px 14px;
  border-radius: 20px;
  border: 1px solid rgba(45, 212, 191, 0.22);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
}

/* ==========================================================================
   3. 节点延迟和状态监控板块：指挥中心仪表台 (Mission Control Dashboard)
   ========================================================================== */
.nodes-section {
  padding: 70px 0 90px;
}

.control-dashboard {
  background: rgba(16, 21, 30, 0.75);
  border: 1px solid var(--border-glass-light);
  border-radius: 24px;
  padding: 32px;
  box-shadow: 0 16px 45px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(20px);
}

/* 顶部骨干光纤拓扑可视化条 */
.backbone-topology-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 16px 24px;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 16px;
}

.topology-node-pair {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topology-city {
  display: flex;
  flex-direction: column;
}

.city-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.topology-cable-line {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 10px;
}

.cable-line {
  width: 50px;
  height: 2px;
  background: linear-gradient(90deg, var(--aurora-green), var(--accent-cyan));
  position: relative;
  overflow: hidden;
}

.cable-line::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 15px;
  height: 2px;
  background: #ffffff;
  animation: cablePulse 1.8s infinite linear;
}

@keyframes cablePulse {
  0% { transform: translateX(-15px); }
  100% { transform: translateX(50px); }
}

.topology-refresh-tool {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-test-now {
  background: rgba(45, 212, 191, 0.12);
  border: 1px solid var(--border-accent);
  color: var(--accent-cyan);
  padding: 7px 16px;
  border-radius: 8px;
  font-size: 0.84rem;
  cursor: pointer;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.btn-test-now:hover {
  background: var(--accent-cyan);
  color: #042f2e;
}

/* 节点分类过滤按钮 */
.dashboard-filter-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.dash-filter-btn {
  padding: 8px 18px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  font-size: 0.88rem;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
}

.dash-filter-btn:hover,
.dash-filter-btn.active {
  background: rgba(45, 212, 191, 0.16);
  color: var(--accent-cyan);
  border-color: rgba(45, 212, 191, 0.4);
}

/* 矩阵式节点卡片排列 */
.matrix-nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

.matrix-node-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: var(--transition);
  position: relative;
}

.matrix-node-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(45, 212, 191, 0.35);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.card-header-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.node-region-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.02rem;
}

.node-pill-type {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(99, 102, 241, 0.18);
  color: #c7d2fe;
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.card-speed-line {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  background: rgba(0, 0, 0, 0.2);
  padding: 10px 14px;
  border-radius: 10px;
}

.speed-metric-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.latency-display {
  display: flex;
  align-items: baseline;
  gap: 3px;
}

.latency-num {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--accent-cyan);
  font-variant-numeric: tabular-nums;
}

.card-status-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 0.74rem;
}

.status-tag {
  padding: 2px 7px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.04);
  color: #94a3b8;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* ==========================================================================
   4. 核心优势板块：Bento 非对称便当盒布局 (Asymmetrical Bento Grid)
   ========================================================================== */
.advantages-section {
  padding: 70px 0 90px;
}

.bento-advantages-container {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 22px;
}

/* Bento 卡片通用样式 */
.bento-card {
  background: rgba(18, 24, 34, 0.75);
  border: 1px solid var(--border-glass-light);
  border-radius: 22px;
  padding: 32px 28px;
  backdrop-filter: blur(18px);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.bento-card:hover {
  transform: translateY(-4px);
  border-color: rgba(45, 212, 191, 0.35);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

.bento-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.bento-card:hover::before {
  opacity: 1;
}

.bento-icon-box {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(45, 212, 191, 0.1);
  border: 1px solid rgba(45, 212, 191, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 20px;
}

.bento-icon-box svg {
  width: 26px;
  height: 26px;
}

.bento-card-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.bento-card-desc {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.68;
}

/* 非对称尺寸分配 */
.bento-span-7 {
  grid-column: span 7;
}

.bento-span-5 {
  grid-column: span 5;
}

.bento-span-4 {
  grid-column: span 4;
}

.bento-span-8 {
  grid-column: span 8;
}

.bento-span-12 {
  grid-column: span 12;
}

/* 专线对比可视化图表嵌入卡片 */
.compare-chart-visual {
  margin-top: 20px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.compare-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.compare-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.compare-bar-track {
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  overflow: hidden;
}

.compare-bar-fill.normal {
  width: 35%;
  height: 100%;
  background: #f59e0b;
}

.compare-bar-fill.aurora {
  width: 99.8%;
  height: 100%;
  background: linear-gradient(90deg, var(--aurora-green), var(--accent-cyan));
  box-shadow: 0 0 10px rgba(45, 212, 191, 0.5);
}

/* ==========================================================================
   4. 套餐价格板块：非对称视觉重构 (15月付、22月付、120年付)
   ========================================================================== */
.pricing-section {
  padding: 70px 0 100px;
}

.pricing-bento-layout {
  display: grid;
  grid-template-columns: 1fr 1.18fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.pricing-tile {
  background: rgba(18, 24, 34, 0.72);
  border: 1px solid var(--border-glass-light);
  border-radius: 24px;
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  backdrop-filter: blur(18px);
}

.pricing-tile:hover {
  transform: translateY(-5px);
  border-color: rgba(45, 212, 191, 0.35);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

/* 核心主力 22月付高亮突出 */
.pricing-tile.flagship-featured {
  background: linear-gradient(160deg, rgba(24, 36, 52, 0.9) 0%, rgba(13, 20, 28, 0.95) 100%);
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 20px 50px rgba(45, 212, 191, 0.22);
  transform: scale(1.04);
  z-index: 2;
}

.pricing-tile.flagship-featured:hover {
  transform: scale(1.06) translateY(-4px);
}

.popular-crown-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--aurora-green), var(--accent-cyan));
  color: #032b27;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 5px 18px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  box-shadow: 0 4px 15px rgba(45, 212, 191, 0.4);
  white-space: nowrap;
}

.pricing-tier-header {
  text-align: center;
  margin-bottom: 24px;
}

.pricing-tier-name {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.pricing-tier-tagline {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.pricing-cost-row {
  display: flex;
  align-items: baseline;
  justify-content: center;
  margin: 18px 0 24px;
}

.pricing-symbol {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.pricing-digits {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.pricing-unit {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-left: 6px;
}

.pricing-checklist {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 13px;
  border-top: 1px solid var(--border-glass);
  padding-top: 22px;
}

.pricing-checklist li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.pricing-checklist li.highlight {
  color: var(--text-primary);
  font-weight: 600;
}

.pricing-checklist li svg {
  width: 17px;
  height: 17px;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.pricing-cta-wrap {
  margin-top: auto;
}

.pricing-cta-wrap .btn {
  width: 100%;
  padding: 13px;
  font-size: 1rem;
}

/* ==========================================================================
   5. 常见问题板块：双栏沉浸式问答 (Split FAQ Hub)
   ========================================================================== */
.faq-section {
  padding: 70px 0 90px;
}

.faq-split-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 36px;
  align-items: flex-start;
}

.faq-left-sticky {
  position: sticky;
  top: 110px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.faq-promise-box {
  background: rgba(18, 24, 34, 0.7);
  border: 1px solid var(--border-glass-light);
  border-radius: 20px;
  padding: 28px;
  backdrop-filter: blur(16px);
}

.promise-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 18px;
}

.promise-item:last-child {
  margin-bottom: 0;
}

.promise-item svg {
  color: var(--accent-cyan);
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  margin-top: 2px;
}

.promise-text h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.promise-text p {
  font-size: 0.84rem;
  color: var(--text-muted);
}

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

.faq-item {
  background: rgba(18, 24, 34, 0.65);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(45, 212, 191, 0.28);
}

.faq-item.active {
  border-color: var(--accent-cyan);
  background: rgba(22, 30, 44, 0.8);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.02rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: var(--transition);
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--accent-cyan);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 420px;
  padding: 0 24px 22px;
}

/* ==========================================================================
   6. 知识库与教程板块：杂志式专栏矩阵 (Magazine-Style Knowledge Hub)
   ========================================================================== */
.kb-section {
  padding: 70px 0 90px;
}

.kb-mosaic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
}

.kb-card {
  background: rgba(18, 24, 34, 0.7);
  border: 1px solid var(--border-glass-light);
  border-radius: 20px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.kb-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-cyan);
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.5);
}

.kb-card-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.kb-tag-chip {
  font-size: 0.74rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(45, 212, 191, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(45, 212, 191, 0.25);
}

.kb-reading-metric {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.kb-card-heading {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.48;
  margin-bottom: 12px;
  transition: var(--transition);
}

.kb-card:hover .kb-card-heading {
  color: var(--accent-cyan);
}

.kb-card-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.62;
  margin-bottom: 20px;
  flex-grow: 1;
}

.kb-card-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.84rem;
  color: var(--accent-cyan);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
  font-weight: 600;
}

.kb-card-action svg {
  width: 16px;
  height: 16px;
  transition: transform 0.25s ease;
}

.kb-card:hover .kb-card-action svg {
  transform: translateX(5px);
}

/* ==========================================================================
   7. 用户评价板块：动态口碑卡片 (User Reviews)
   ========================================================================== */
.reviews-section {
  padding: 70px 0 100px;
}

.reviews-asym-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.review-bento-tile {
  background: rgba(18, 24, 34, 0.7);
  border: 1px solid var(--border-glass-light);
  border-radius: 20px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}

.review-bento-tile:hover {
  transform: translateY(-4px);
  border-color: rgba(45, 212, 191, 0.35);
}

.review-stars-bar {
  display: flex;
  gap: 4px;
  color: #FBBF24;
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.review-statement {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.72;
  margin-bottom: 24px;
  flex-grow: 1;
}

.review-user-block {
  display: flex;
  align-items: center;
  gap: 14px;
}

.user-badge-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--aurora-green), var(--aurora-indigo));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.05rem;
  color: #fff;
  box-shadow: 0 0 12px rgba(45, 212, 191, 0.3);
}

.user-bio .bio-name {
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text-primary);
}

.user-bio .bio-title {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   全局底部 CTA Banner 与 页脚
   ========================================================================== */
.cta-banner-section {
  padding: 60px 0 90px;
}

.cta-banner-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.18) 0%, rgba(99, 102, 241, 0.28) 100%);
  border: 1px solid rgba(45, 212, 191, 0.35);
  border-radius: 28px;
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.55);
}

.cta-banner-box h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.cta-banner-box p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 660px;
  margin: 0 auto 34px;
}

.footer {
  border-top: 1px solid var(--border-glass);
  background: rgba(10, 14, 20, 0.92);
  padding: 50px 0 35px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-brand .brand-logo {
  font-size: 1.15rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.85rem;
  max-width: 400px;
}

.footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 25px;
  font-size: 0.82rem;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   知识库文章详情页样式保留
   ========================================================================== */
.article-header {
  padding: 50px 0 30px;
  text-align: center;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--accent-cyan);
  text-decoration: none;
}

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

.article-title {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  color: var(--text-muted);
  font-size: 0.88rem;
  flex-wrap: wrap;
}

.article-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.article-content {
  background: rgba(22, 27, 34, 0.7);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 45px 40px;
  backdrop-filter: blur(16px);
  color: var(--text-primary);
  line-height: 1.85;
  font-size: 1.05rem;
}

.article-content h2 {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 38px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(45, 212, 191, 0.2);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-content h2::before {
  content: '';
  width: 4px;
  height: 22px;
  background: var(--accent-cyan);
  border-radius: 2px;
  display: inline-block;
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: #e2e8f0;
  margin: 28px 0 12px;
}

.article-content p {
  margin-bottom: 20px;
  color: #cbd5e1;
}

.article-content strong {
  color: var(--accent-cyan);
  font-weight: 600;
}

.article-content ul, .article-content ol {
  margin: 16px 0 24px 24px;
  color: #cbd5e1;
}

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

.article-content blockquote {
  border-left: 4px solid var(--accent-cyan);
  background: rgba(45, 212, 191, 0.08);
  padding: 16px 20px;
  border-radius: 0 12px 12px 0;
  margin: 24px 0;
  color: #e2e8f0;
}

.article-cta-box {
  margin-top: 45px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12) 0%, rgba(99, 102, 241, 0.2) 100%);
  border: 1px solid rgba(45, 212, 191, 0.35);
  border-radius: 16px;
  padding: 30px;
  text-align: center;
}

.article-cta-box h4 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.article-cta-box p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 0.95rem;
}

/* ==========================================================================
   移动端与响应式适配
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-bento-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .pricing-bento-layout {
    grid-template-columns: 1fr;
  }
  .pricing-tile.flagship-featured {
    transform: none;
  }
  .bento-advantages-container {
    grid-template-columns: 1fr;
  }
  .bento-span-7, .bento-span-5, .bento-span-4, .bento-span-8, .bento-span-12 {
    grid-column: span 1;
  }
  .faq-split-layout {
    grid-template-columns: 1fr;
  }
  .faq-left-sticky {
    position: static;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }
  .navbar {
    width: 100%;
    top: 0;
    border-radius: 0;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(13, 17, 23, 0.98);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-glass);
    gap: 16px;
    backdrop-filter: blur(25px);
  }
  .nav-links.show {
    display: flex;
  }
  .backbone-topology-bar {
    flex-direction: column;
    align-items: flex-start;
  }
  .kb-mosaic-grid, .matrix-nodes-grid {
    grid-template-columns: 1fr;
  }
}