/* ==========================================================================
   悠兔机场 (YouTu Network Service) - Design Set 1: Premium Editorial SaaS
   Palette: Pure White, Sage/Forest Green (#244C3A, #3F7459, #EEF3EF, #16231D)
   Typography: Clean System Sans, 17px Body, 1.75 Line Height, Editorial Layout
   ========================================================================== */

:root {
  /* Colors */
  --bg-page: #FFFFFF;
  --bg-subtle: #F8FAF8;
  --bg-card: #FFFFFF;
  --bg-card-soft: #F9FBF9;
  --bg-tint-sage: #EEF4F0;
  --bg-tint-sage-hover: #E4ECE6;
  --bg-tint-accent: #E5EFE8;
  
  --brand-forest: #244C3A;
  --brand-forest-dark: #193528;
  --brand-forest-light: #2F604A;
  --brand-sage: #3F7459;
  --brand-sage-light: #52896D;
  --brand-emerald: #2EA063;
  --brand-gold-tint: #FDF9F0;
  --brand-gold-border: #E8DCBE;
  --brand-gold-text: #8C651E;
  
  --text-title: #14221A;
  --text-main: #33433A;
  --text-muted: #5C6E64;
  --text-subtle: #899B90;
  --text-on-dark: #FFFFFF;
  
  --border-light: #E4ECE5;
  --border-card: #E1E8E2;
  --border-focus: #244C3A;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  --font-size-base: 17px;
  --line-height-base: 1.75;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(20, 34, 26, 0.04), 0 2px 6px rgba(20, 34, 26, 0.02);
  --shadow-card: 0 1px 3px rgba(20, 34, 26, 0.04), 0 8px 24px rgba(20, 34, 26, 0.04);
  --shadow-card-hover: 0 4px 12px rgba(20, 34, 26, 0.06), 0 16px 36px rgba(20, 34, 26, 0.08);
  --shadow-elevated: 0 10px 30px rgba(20, 34, 26, 0.08);
  
  /* Radii */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s ease;
}

/* Base Reset & Typography */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: var(--line-height-base);
  color: var(--text-main);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

/* Layout Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
}

.container-narrow {
  max-width: 900px;
}

/* Section Common Styling */
.section {
  padding-top: 96px;
  padding-bottom: 96px;
  position: relative;
}

.section-subtle {
  background-color: var(--bg-subtle);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-header {
  margin-bottom: 54px;
}

.section-header.text-center {
  text-align: center;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--brand-forest);
  background-color: var(--bg-tint-sage);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  border: 1px solid rgba(36, 76, 58, 0.12);
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-title);
  letter-spacing: -0.015em;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.75;
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-normal);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* Brand Symbol & Logo */
.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 20px;
  color: var(--brand-forest);
  letter-spacing: -0.01em;
}

.brand-symbol {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #244C3A 0%, #3F7459 100%);
  color: #FFFFFF;
  border-radius: 9px;
  box-shadow: 0 2px 6px rgba(36, 76, 58, 0.2);
  flex-shrink: 0;
}

.brand-name {
  font-size: 19px;
  font-weight: 700;
  color: var(--brand-forest);
}

.brand-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  background-color: var(--bg-tint-sage);
  color: var(--brand-forest);
  border-radius: var(--radius-full);
  margin-left: 2px;
  border: 1px solid rgba(36, 76, 58, 0.12);
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--brand-forest);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--brand-forest);
  transition: width var(--transition-fast);
  border-radius: 1px;
}

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

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--brand-forest);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.btn-link:hover {
  background-color: var(--bg-tint-sage);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--brand-forest);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--brand-forest);
  transition: all var(--transition-fast);
  box-shadow: 0 2px 6px rgba(36, 76, 58, 0.15);
}

.btn-primary:hover {
  background-color: var(--brand-forest-dark);
  border-color: var(--brand-forest-dark);
  box-shadow: 0 4px 12px rgba(36, 76, 58, 0.25);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: #FFFFFF;
  color: var(--brand-forest);
  font-size: 15px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-card);
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background-color: var(--bg-tint-sage);
  border-color: var(--brand-sage);
  color: var(--brand-forest-dark);
  transform: translateY(-1px);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  color: var(--brand-forest);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background-color: #FFFFFF;
}

/* ==========================================================================
   Hero Section: Editorial Split Layout (55% / 45%)
   ========================================================================== */
.hero-section {
  padding-top: 72px;
  padding-bottom: 72px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F9FAF9 100%);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 55fr 45fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  padding-right: 12px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--brand-forest);
  background-color: var(--bg-tint-sage);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 22px;
  border: 1px solid rgba(36, 76, 58, 0.12);
}

.hero-tag-dot {
  width: 7px;
  height: 7px;
  background-color: var(--brand-emerald);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(46, 160, 99, 0.2);
}

.hero-title {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-title);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-title .title-accent {
  color: var(--brand-forest);
  display: block;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.hero-features-row {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  color: var(--text-main);
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  flex-wrap: wrap;
}

.hero-feature-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.hero-feature-item svg {
  color: var(--brand-sage);
  flex-shrink: 0;
}

/* Hero Network Overview Dashboard */
.hero-dashboard {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 24px;
  position: relative;
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 18px;
}

.dashboard-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dashboard-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-title);
}

.dashboard-live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--brand-emerald);
  background-color: rgba(46, 160, 99, 0.08);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  background-color: var(--brand-emerald);
  border-radius: 50%;
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.dashboard-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.dashboard-meta-card {
  background-color: var(--bg-card-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
}

.meta-label {
  font-size: 12px;
  color: var(--text-subtle);
  margin-bottom: 3px;
  font-weight: 500;
}

.meta-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-title);
}

.dashboard-section-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.node-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.node-item:hover {
  border-color: var(--brand-sage);
  background-color: var(--bg-card-soft);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-flag {
  font-size: 18px;
  line-height: 1;
}

.node-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-title);
}

.node-type {
  font-size: 12px;
  color: var(--text-muted);
}

.node-ping {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ping-value {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--brand-forest);
  background-color: var(--bg-tint-sage);
  padding: 3px 8px;
  border-radius: var(--radius-xs);
}

.ping-bar {
  width: 32px;
  height: 4px;
  background-color: var(--border-light);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}

.ping-fill {
  height: 100%;
  background-color: var(--brand-emerald);
  border-radius: 2px;
}

.dashboard-footer-note {
  margin-top: 14px;
  font-size: 12px;
  color: var(--text-subtle);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* ==========================================================================
   Trust Bar (Hero 下方信任条)
   ========================================================================== */
.trust-bar {
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: 24px 0;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.trust-item {
  display: flex;
  flex-direction: column;
  padding: 0 12px;
  border-left: 1px solid var(--border-light);
}

.trust-item:first-child {
  border-left: none;
  padding-left: 0;
}

.trust-highlight {
  font-size: 18px;
  font-weight: 700;
  color: var(--brand-forest);
  line-height: 1.3;
}

.trust-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   Line Advantages (线路优势) - Bento Card Layout
   ========================================================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.card-advantage {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card-advantage:hover {
  border-color: var(--brand-sage);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.card-adv-1 {
  grid-column: span 7;
  background: linear-gradient(135deg, #FFFFFF 0%, #F5F9F6 100%);
  border-color: rgba(36, 76, 58, 0.2);
}

.card-adv-2 {
  grid-column: span 5;
}

.card-adv-3 {
  grid-column: span 5;
}

.card-adv-4 {
  grid-column: span 7;
}

.adv-top {
  margin-bottom: 24px;
}

.adv-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.adv-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--bg-tint-sage);
  color: var(--brand-forest);
  display: flex;
  align-items: center;
  justify-content: center;
}

.adv-tags {
  display: flex;
  gap: 6px;
}

.adv-tag {
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background-color: var(--bg-tint-sage);
  color: var(--brand-forest);
  border: 1px solid rgba(36, 76, 58, 0.1);
}

.adv-tag.tag-primary {
  background-color: var(--brand-forest);
  color: #FFFFFF;
  border-color: var(--brand-forest);
}

.adv-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 12px;
}

.adv-desc {
  font-size: 16px;
  color: var(--text-main);
  line-height: 1.7;
}

.adv-footer-spec {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
  font-size: 13px;
  color: var(--text-muted);
}

.spec-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.spec-dot {
  width: 6px;
  height: 6px;
  background-color: var(--brand-sage);
  border-radius: 50%;
}

/* ==========================================================================
   Network Architecture (网络架构展示)
   ========================================================================== */
.network-architecture-wrap {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 32px;
  align-items: stretch;
}

.diagram-panel {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
}

.diagram-step {
  display: flex;
  flex-direction: column;
  position: relative;
}

.diagram-step-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.step-badge {
  font-size: 12px;
  font-weight: 700;
  color: var(--brand-forest);
  background-color: var(--bg-tint-sage);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
}

.step-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-title);
}

.step-nodes {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.node-pill {
  padding: 8px 14px;
  background-color: var(--bg-card-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 6px;
}

.node-pill.pill-accent {
  background-color: var(--bg-tint-sage);
  border-color: rgba(36, 76, 58, 0.2);
  color: var(--brand-forest);
}

.diagram-arrow-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 0;
  color: var(--brand-sage);
}

.diagram-arrow-connector svg {
  animation: bounceDown 2s infinite ease-in-out;
}

@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(3px); }
}

/* Status Side Panel */
.status-side-panel {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.panel-header {
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 18px;
  margin-bottom: 24px;
}

.panel-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 6px;
}

.panel-desc {
  font-size: 13px;
  color: var(--text-muted);
}

.status-rows {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 24px;
}

.status-row-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background-color: var(--bg-card-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
}

.status-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.status-state-pill {
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--brand-forest);
  background-color: var(--bg-tint-sage);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.panel-callout {
  padding: 16px;
  background-color: var(--bg-tint-sage);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(36, 76, 58, 0.12);
  font-size: 13px;
  color: var(--brand-forest);
  line-height: 1.6;
}

/* ==========================================================================
   AI & Streaming Scenarios (使用场景)
   ========================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.scenario-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.scenario-card:hover {
  border-color: var(--brand-sage);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.scenario-ai {
  grid-column: span 6;
}

.scenario-stream {
  grid-column: span 6;
}

.scenario-daily {
  grid-column: span 12;
  background: linear-gradient(180deg, #FFFFFF 0%, #FBFDFB 100%);
}

.scenario-icon-title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.scenario-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--bg-tint-sage);
  color: var(--brand-forest);
  display: flex;
  align-items: center;
  justify-content: center;
}

.scenario-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-title);
}

.scenario-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.app-pill-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.app-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background-color: var(--bg-card-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.app-pill:hover {
  border-color: var(--brand-sage);
  background-color: #FFFFFF;
}

.app-pill svg {
  width: 16px;
  height: 16px;
}

/* ==========================================================================
   Pricing Section (套餐区域)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.card-pricing {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: all var(--transition-fast);
}

.card-pricing:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--brand-sage);
  transform: translateY(-2px);
}

.card-pricing.featured {
  border: 2px solid var(--brand-forest);
  box-shadow: var(--shadow-elevated);
  background: linear-gradient(180deg, #FFFFFF 0%, #F5F9F6 100%);
}

.pricing-badge-top {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--brand-forest);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
}

.pricing-head {
  margin-bottom: 24px;
}

.pricing-plan-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 8px;
}

.pricing-plan-target {
  font-size: 13px;
  color: var(--text-muted);
  min-height: 40px;
}

.pricing-price-wrap {
  margin-top: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
}

.price-currency {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-title);
  vertical-align: top;
  margin-right: 2px;
}

.price-number {
  font-size: 38px;
  font-weight: 800;
  color: var(--text-title);
  font-family: var(--font-mono);
  letter-spacing: -0.03em;
}

.price-period {
  font-size: 14px;
  color: var(--text-muted);
}

.price-sub-calc {
  font-size: 13px;
  color: var(--brand-forest);
  font-weight: 600;
  margin-top: 4px;
}

.price-official-notice {
  font-size: 13px;
  color: var(--text-subtle);
  margin-top: 6px;
}

.pricing-features-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-main);
  line-height: 1.5;
}

.pricing-feature-item svg {
  color: var(--brand-sage);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-tip-banner {
  background-color: var(--bg-card-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-muted);
}

.pricing-tip-banner svg {
  color: var(--brand-forest);
  flex-shrink: 0;
}

/* ==========================================================================
   Dynamic Multiplier (动态倍率说明)
   ========================================================================== */
.multiplier-box {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.multiplier-flow-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  margin-top: 36px;
}

.multiplier-step-card {
  background-color: var(--bg-card-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: all var(--transition-fast);
}

.multiplier-step-card:hover {
  background-color: #FFFFFF;
  border-color: var(--brand-sage);
  box-shadow: var(--shadow-sm);
}

.multiplier-step-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 12px;
  border-radius: var(--radius-full);
  background-color: var(--bg-tint-sage);
  color: var(--brand-forest);
  display: flex;
  align-items: center;
  justify-content: center;
}

.multiplier-step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 6px;
}

.multiplier-step-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.multiplier-arrow {
  color: var(--brand-sage);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   Editorial Article: 悠兔机场介绍 (关于悠兔)
   ========================================================================== */
.article-editorial-wrap {
  display: grid;
  grid-template-columns: 8fr 4fr;
  gap: 40px;
  align-items: start;
}

.article-content {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-sm);
}

.article-header {
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

.article-lead {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-main);
  font-weight: 500;
  background-color: var(--bg-card-soft);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--brand-forest);
  margin-bottom: 36px;
}

.article-part {
  margin-bottom: 40px;
}

.article-part:last-of-type {
  margin-bottom: 28px;
}

.part-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.part-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--brand-forest);
  background-color: var(--bg-tint-sage);
  padding: 3px 10px;
  border-radius: var(--radius-xs);
}

.part-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-title);
}

.article-body-p {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 16px;
}

.article-quote-box {
  margin: 20px 0;
  padding: 18px 24px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
}

.article-summary-box {
  margin-top: 36px;
  padding: 28px;
  background: linear-gradient(135deg, #F8FAF8 0%, #EEF4F0 100%);
  border: 1px solid rgba(36, 76, 58, 0.15);
  border-radius: var(--radius-md);
}

.summary-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--brand-forest);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.summary-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.summary-pill {
  font-size: 13px;
  font-weight: 600;
  color: var(--brand-forest);
  background-color: #FFFFFF;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(36, 76, 58, 0.15);
}

/* Editorial Review Card (编辑观察) */
.editorial-side-card {
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.card-editorial-review {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.review-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--brand-forest);
  background-color: var(--bg-tint-sage);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  border: 1px solid rgba(36, 76, 58, 0.1);
}

.review-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 14px;
}

.review-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 20px;
}

.review-guidelines {
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.guideline-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.guideline-dot {
  width: 6px;
  height: 6px;
  background-color: var(--brand-sage);
  border-radius: 50%;
}

.card-service-experience {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.service-exp-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-exp-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   Client Support (客户端支持)
   ========================================================================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.client-platform-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.client-platform-card:hover {
  border-color: var(--brand-sage);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.client-icon-wrap {
  width: 52px;
  height: 52px;
  margin: 0 auto 16px;
  border-radius: var(--radius-md);
  background-color: var(--bg-tint-sage);
  color: var(--brand-forest);
  display: flex;
  align-items: center;
  justify-content: center;
}

.client-platform-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 4px;
}

.client-desc {
  font-size: 13px;
  color: var(--text-muted);
}

.official-client-callout {
  background: linear-gradient(135deg, #FFFFFF 0%, #F5F9F6 100%);
  border: 1px solid rgba(36, 76, 58, 0.2);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  box-shadow: var(--shadow-sm);
}

.official-left {
  display: flex;
  align-items: center;
  gap: 18px;
}

.official-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--brand-forest);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.official-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 4px;
}

.official-subtitle {
  font-size: 15px;
  color: var(--text-main);
  line-height: 1.6;
}

.third-party-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-subtle);
  text-align: center;
}

/* ==========================================================================
   User Reviews (用户评价)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-quote-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.review-quote-card:hover {
  border-color: var(--brand-sage);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.review-quote-text {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 24px;
  position: relative;
}

.review-quote-text::before {
  content: "“";
  font-family: Georgia, serif;
  font-size: 48px;
  color: rgba(36, 76, 58, 0.15);
  position: absolute;
  top: -24px;
  left: -8px;
  line-height: 1;
}

.review-author-row {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
}

.author-avatar-initial {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: var(--bg-tint-sage);
  color: var(--brand-forest);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.author-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-title);
}

.author-role {
  font-size: 12px;
  color: var(--text-muted);
}

/* ==========================================================================
   FAQ Section (常见问题)
   ========================================================================== */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background-color: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--brand-forest);
}

.faq-question-btn {
  width: 100%;
  padding: 22px 28px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: none;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-title);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.faq-question-btn:hover {
  color: var(--brand-forest);
}

.faq-icon-arrow {
  width: 20px;
  height: 20px;
  color: var(--brand-sage);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon-arrow {
  transform: rotate(180deg);
  color: var(--brand-forest);
}

.faq-answer-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.faq-answer-inner {
  padding: 0 28px 24px 28px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-main);
  border-top: 1px solid rgba(228, 236, 229, 0.4);
  padding-top: 16px;
}

/* ==========================================================================
   Bottom CTA
   ========================================================================== */
.cta-section {
  padding-top: 80px;
  padding-bottom: 80px;
}

.cta-box {
  background: linear-gradient(135deg, #EEF4F0 0%, #E3EDE6 100%);
  border: 1px solid rgba(36, 76, 58, 0.15);
  border-radius: var(--radius-xl);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--brand-forest);
  margin-bottom: 16px;
  letter-spacing: -0.015em;
}

.cta-subtitle {
  font-size: 18px;
  color: var(--text-main);
  line-height: 1.75;
  max-width: 600px;
  margin: 0 auto 32px;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-light);
  padding-top: 64px;
  padding-bottom: 40px;
}

.footer-top {
  display: grid;
  grid-template-columns: 4fr 2fr 2fr 2fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-light);
}

.footer-brand-col {
  padding-right: 20px;
}

.footer-logo-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 20px;
  max-width: 320px;
}

.footer-protocol-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.protocol-badge {
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--brand-forest);
  background-color: var(--bg-tint-sage);
  padding: 3px 8px;
  border-radius: var(--radius-xs);
}

.footer-col-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  font-size: 14px;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--brand-forest);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  font-size: 13px;
  color: var(--text-subtle);
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

/* ==========================================================================
   Mobile Nav Drawer & Overlay
   ========================================================================== */
.mobile-nav-drawer {
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-elevated);
  padding: 24px;
  transform: translateY(-110%);
  transition: transform var(--transition-normal), visibility var(--transition-normal);
  z-index: 999;
  display: none;
  pointer-events: none;
  visibility: hidden;
}

.mobile-nav-drawer.open {
  transform: translateY(0);
  pointer-events: auto;
  visibility: visible;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.mobile-nav-link {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-title);
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
}

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

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

/* 1024px and down (Tablets / Small Laptops) */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .hero-content {
    padding-right: 0;
  }
  
  .trust-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  
  .trust-item:nth-child(4),
  .trust-item:nth-child(5) {
    border-left: none;
  }
  
  .card-adv-1,
  .card-adv-2,
  .card-adv-3,
  .card-adv-4 {
    grid-column: span 12;
  }
  
  .network-architecture-wrap {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .article-editorial-wrap {
    grid-template-columns: 1fr;
  }
  
  .editorial-side-card {
    position: static;
  }
  
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 768px and down (Tablets / Large Mobiles) */
@media (max-width: 768px) {
  :root {
    --font-size-base: 16px;
  }
  
  .section {
    padding-top: 64px;
    padding-bottom: 64px;
  }
  
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }
  
  .nav-menu,
  .header-actions .btn-link,
  .header-actions .btn-primary {
    display: none;
  }
  
  .mobile-toggle {
    display: flex;
  }
  
  .mobile-nav-drawer {
    display: block;
  }
  
  .hero-title {
    font-size: 32px;
  }
  
  .hero-subtitle {
    font-size: 16px;
  }
  
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .trust-item {
    border-left: none;
    padding-left: 0;
  }
  
  .scenario-ai,
  .scenario-stream {
    grid-column: span 12;
  }
  
  .multiplier-flow-grid {
    grid-template-columns: 1fr;
  }
  
  .multiplier-arrow {
    transform: rotate(90deg);
    padding: 8px 0;
  }
  
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  
  .official-client-callout {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .cta-box {
    padding: 40px 24px;
  }
  
  .cta-title {
    font-size: 28px;
  }
  
  .article-content {
    padding: 28px 20px;
  }
}

/* 480px and down (Standard & Small Mobiles: 375, 390, 430) */
@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  
  .hero-title {
    font-size: 27px;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    width: 100%;
    min-height: 48px;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .dashboard-meta-grid {
    grid-template-columns: 1fr;
  }
  
  .trust-grid {
    grid-template-columns: 1fr;
  }
  
  .clients-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .cta-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .cta-actions .btn-primary {
    width: 100%;
    min-height: 48px;
  }
  
  .faq-question-btn {
    padding: 18px 20px;
    font-size: 16px;
  }
  
  .faq-answer-inner {
    padding: 0 20px 20px 20px;
    font-size: 15px;
  }
}