/* ==========================================================================
   FlyingBird 飞鸟云 - 奇幻探索路线图风格系统 (Fantasy Quest-Map Design System)
   Palette: Parchment Cream, Burgundy, Moss Green, Antique Gold
   ========================================================================== */

:root {
  /* Core Palette */
  --parchment-base: #FDFBF7;
  --parchment-card: #F7EFE4;
  --parchment-card-hover: #F2E7D8;
  --parchment-subtle: #ECE0D0;
  --parchment-border: #DBC8B2;
  --parchment-dark: #CCAFA0;

  --burgundy-primary: #7A2832;
  --burgundy-deep: #5A1B23;
  --burgundy-light: #943440;
  --burgundy-tint: #F8ECEE;

  --moss-primary: #2F5233;
  --moss-deep: #1E3822;
  --moss-light: #3D6B42;
  --moss-tint: #EEF5EF;

  --gold-primary: #C59B27;
  --gold-rich: #D4AF37;
  --gold-deep: #8F6B12;
  --gold-tint: #FAF5E8;

  --ink-primary: #26221D;
  --ink-secondary: #585045;
  --ink-tertiary: #82786B;
  --ink-inverse: #FDFBF7;

  /* Typography */
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, "STSong", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Shadows with warm antique glow */
  --shadow-sm: 0 1px 3px rgba(38, 34, 29, 0.08);
  --shadow-md: 0 4px 12px rgba(38, 34, 29, 0.1);
  --shadow-lg: 0 10px 25px rgba(38, 34, 29, 0.12);
  --shadow-parchment: 0 8px 24px rgba(122, 40, 50, 0.08);

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 9999px;

  /* Spacing */
  --container-max: 1200px;
  --section-gap: 80px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--parchment-base);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  background-image: 
    radial-gradient(var(--parchment-border) 0.6px, transparent 0.6px),
    radial-gradient(var(--gold-primary) 0.4px, transparent 0.4px);
  background-size: 32px 32px, 96px 96px;
  background-position: 0 0, 16px 16px;
}

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

a {
  color: var(--burgundy-primary);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

a:hover, a:focus-visible {
  color: var(--burgundy-deep);
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

/* Accessible focus ring with antique gold glow */
:focus-visible {
  outline: 2px solid var(--gold-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Typography Headings (System Chinese Serif)
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--burgundy-primary);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.25rem, 2.2vw, 1.55rem); }
h4 { font-size: 1.2rem; }

p {
  margin-bottom: 1rem;
}
p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Layout & Container
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.section {
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  background-color: var(--gold-tint);
  border: 1px solid var(--gold-primary);
  color: var(--gold-deep);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.section-tag.tag-moss {
  background-color: var(--moss-tint);
  border-color: var(--moss-primary);
  color: var(--moss-primary);
}

.section-tag.tag-burgundy {
  background-color: var(--burgundy-tint);
  border-color: var(--burgundy-primary);
  color: var(--burgundy-primary);
}

.section-title {
  margin-bottom: 14px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-primary), var(--burgundy-primary));
  margin: 12px auto 0;
  border-radius: 2px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--ink-secondary);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(253, 251, 247, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--parchment-border);
  box-shadow: 0 2px 10px rgba(38, 34, 29, 0.04);
  transition: all 0.3s ease;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--burgundy-primary);
  text-decoration: none;
}

.brand-logo svg {
  width: 36px;
  height: 36px;
  filter: drop-shadow(0 2px 4px rgba(122, 40, 50, 0.2));
}

.brand-logo span {
  display: inline-block;
  line-height: 1;
}

.brand-tagline {
  font-size: 0.75rem;
  font-family: var(--font-sans);
  color: var(--moss-primary);
  font-weight: 500;
  letter-spacing: 0.02em;
  display: block;
  margin-top: 3px;
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: 22px;
}

@media (min-width: 992px) {
  .nav-desktop {
    display: flex;
  }
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-secondary);
  position: relative;
  padding: 6px 2px;
  transition: color 0.2s ease;
}

.nav-link:hover, .nav-link:focus-visible {
  color: var(--burgundy-primary);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--gold-primary);
  transition: width 0.25s ease;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.hamburger-btn {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 44px;
  height: 44px;
  padding: 10px 8px;
  border-radius: var(--radius-sm);
  background: var(--parchment-card);
  border: 1px solid var(--parchment-border);
}

@media (min-width: 992px) {
  .hamburger-btn {
    display: none;
  }
}

.hamburger-line {
  width: 100%;
  height: 2px;
  background-color: var(--burgundy-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger-btn[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger-btn[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger-btn[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Nav Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(38, 34, 29, 0.4);
  backdrop-filter: blur(4px);
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-nav-drawer.is-active {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-panel {
  background: var(--parchment-base);
  border-bottom: 2px solid var(--gold-primary);
  box-shadow: var(--shadow-lg);
  padding: 24px 20px 32px;
  max-height: calc(100vh - 72px);
  overflow-y: auto;
  transform: translateY(-20px);
  transition: transform 0.3s ease;
}

.mobile-nav-drawer.is-active .mobile-nav-panel {
  transform: translateY(0);
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 24px;
}

.mobile-nav-link {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--burgundy-primary);
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--parchment-card);
  border-left: 3px solid var(--gold-primary);
}

/* ==========================================================================
   Buttons & CTAs
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--burgundy-primary), var(--burgundy-deep));
  color: #FFFFFF;
  border: 1px solid var(--gold-deep);
  box-shadow: 0 4px 10px rgba(122, 40, 50, 0.25);
}

.btn-primary:hover, .btn-primary:focus-visible {
  background: linear-gradient(135deg, var(--burgundy-light), var(--burgundy-primary));
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(122, 40, 50, 0.35);
}

.btn-secondary {
  background: var(--parchment-card);
  color: var(--ink-primary);
  border: 1px solid var(--parchment-border);
}

.btn-secondary:hover, .btn-secondary:focus-visible {
  background: var(--parchment-card-hover);
  border-color: var(--gold-primary);
  color: var(--burgundy-primary);
  transform: translateY(-2px);
}

.btn-gold {
  background: linear-gradient(135deg, var(--gold-rich), var(--gold-deep));
  color: #FFFFFF;
  border: 1px solid var(--gold-primary);
}

.btn-gold:hover {
  background: linear-gradient(135deg, #E6C252, var(--gold-rich));
  color: #FFFFFF;
  transform: translateY(-2px);
}

/* ==========================================================================
   Hero Section: Quest Map & Introduction Cartouche
   ========================================================================== */
.hero-section {
  padding-top: 40px;
  padding-bottom: 70px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.15fr 1fr;
    gap: 48px;
  }
}

/* Cartouche Panel on Left */
.hero-cartouche {
  background: var(--parchment-card);
  border: 2px solid var(--gold-primary);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  position: relative;
  box-shadow: var(--shadow-parchment);
}

.hero-cartouche::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px dashed var(--burgundy-primary);
  border-radius: calc(var(--radius-md) - 2px);
  pointer-events: none;
  opacity: 0.6;
}

.hero-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.hero-badge {
  font-size: 0.8rem;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-badge-burgundy {
  background: var(--burgundy-tint);
  color: var(--burgundy-primary);
  border: 1px solid var(--burgundy-primary);
}

.hero-badge-moss {
  background: var(--moss-tint);
  color: var(--moss-primary);
  border: 1px solid var(--moss-primary);
}

.hero-title {
  font-size: clamp(2.1rem, 3.8vw, 3rem);
  line-height: 1.25;
  margin-bottom: 18px;
  color: var(--burgundy-primary);
}

.hero-title .title-accent {
  color: var(--moss-primary);
  display: block;
}

.hero-title .title-gold {
  color: var(--gold-deep);
}

.hero-desc {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--ink-secondary);
  margin-bottom: 24px;
}

.hero-features-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 30px;
}

@media (min-width: 580px) {
  .hero-features-list {
    grid-template-columns: 1fr 1fr;
  }
}

.hero-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--ink-primary);
}

.hero-feature-item svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  color: var(--moss-primary);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 24px;
}

.hero-guarantee {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--ink-tertiary);
  padding-top: 18px;
  border-top: 1px solid var(--parchment-border);
}

.hero-guarantee span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Quest Map Box on Right */
.quest-map-box {
  background: var(--parchment-base);
  border: 2px solid var(--gold-primary);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.quest-map-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--parchment-border);
}

.quest-map-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--burgundy-primary);
}

.quest-map-hint {
  font-size: 0.8rem;
  color: var(--moss-primary);
  background: var(--moss-tint);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--moss-primary);
}

.quest-map-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 11;
  background: #FAF5EB;
  border: 1px solid var(--parchment-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.quest-map-svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* Quest Map Interactive Checkpoints Overlay */
.checkpoint-btn {
  cursor: pointer;
  outline: none;
  transition: transform 0.2s ease, filter 0.2s ease;
}

.checkpoint-btn:hover, .checkpoint-btn:focus-visible {
  filter: drop-shadow(0 0 8px rgba(197, 155, 39, 0.8));
  transform: scale(1.08);
}

.checkpoint-btn.is-selected circle.node-glow {
  fill: var(--gold-primary);
  opacity: 0.6;
  animation: pulseGold 2s infinite ease-in-out;
}

@keyframes pulseGold {
  0% { transform: scale(1); opacity: 0.4; }
  50% { transform: scale(1.3); opacity: 0.8; }
  100% { transform: scale(1); opacity: 0.4; }
}

/* Quest Mini Interaction Status & Tip Panel */
.quest-interaction-panel {
  margin-top: 14px;
  background: var(--parchment-card);
  border: 1px solid var(--gold-primary);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}

.quest-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  font-size: 0.85rem;
}

.quest-step-indicators {
  display: flex;
  gap: 6px;
}

.quest-step-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--parchment-subtle);
  border: 1px solid var(--parchment-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: bold;
  color: var(--ink-tertiary);
  transition: all 0.25s ease;
}

.quest-step-dot.is-active {
  background: var(--gold-primary);
  border-color: var(--gold-deep);
  color: #FFFFFF;
}

.quest-step-dot.is-done {
  background: var(--moss-primary);
  border-color: var(--moss-deep);
  color: #FFFFFF;
}

.quest-reset-btn {
  font-size: 0.78rem;
  color: var(--burgundy-primary);
  text-decoration: underline;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.quest-tip-display {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--ink-primary);
  background: var(--parchment-base);
  border-left: 3px solid var(--burgundy-primary);
  padding: 10px 14px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  min-height: 54px;
  display: flex;
  align-items: center;
}

/* Static fallback accordion for device/setup tips */
.tips-fallback-wrap {
  margin-top: 14px;
}

.tips-fallback-title {
  font-size: 0.85rem;
  color: var(--ink-secondary);
  font-weight: 600;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tips-details-item {
  background: var(--parchment-base);
  border: 1px solid var(--parchment-border);
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  font-size: 0.85rem;
}

.tips-details-item summary {
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 600;
  color: var(--burgundy-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tips-details-item summary::-webkit-details-marker {
  display: none;
}

.tips-details-item p {
  padding: 8px 12px 10px;
  color: var(--ink-secondary);
  border-top: 1px dashed var(--parchment-border);
  font-size: 0.82rem;
}

/* ==========================================================================
   Milestones (Advantages as Route Milestones)
   ========================================================================== */
.milestones-track {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  position: relative;
}

@media (min-width: 768px) {
  .milestones-track {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .milestones-track {
    grid-template-columns: repeat(4, 1fr);
  }
}

.milestone-card {
  background: var(--parchment-card);
  border: 1px solid var(--parchment-border);
  border-top: 4px solid var(--burgundy-primary);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  position: relative;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.milestone-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold-primary);
  border-top-color: var(--burgundy-primary);
  box-shadow: var(--shadow-md);
  background: var(--parchment-card-hover);
}

.milestone-card:nth-child(2) {
  border-top-color: var(--moss-primary);
}
.milestone-card:nth-child(3) {
  border-top-color: var(--gold-primary);
}
.milestone-card:nth-child(4) {
  border-top-color: var(--burgundy-deep);
}

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

.milestone-order {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--gold-deep);
  letter-spacing: 0.05em;
  background: var(--gold-tint);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gold-primary);
}

.milestone-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--parchment-base);
  border: 1px solid var(--parchment-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--burgundy-primary);
}

.milestone-icon svg {
  width: 22px;
  height: 22px;
}

.milestone-title {
  font-size: 1.25rem;
  margin-bottom: 10px;
  color: var(--burgundy-primary);
}

.milestone-text {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--ink-secondary);
}

.milestone-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--parchment-border);
}

.milestone-tag-pill {
  font-size: 0.75rem;
  background: var(--parchment-base);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  color: var(--ink-tertiary);
  border: 1px solid var(--parchment-border);
}

/* ==========================================================================
   Destination Notes (Network Information)
   ========================================================================== */
.destination-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

@media (min-width: 768px) {
  .destination-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .destination-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.destination-card {
  background: var(--parchment-card);
  border: 1px solid var(--parchment-border);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.destination-card:hover {
  transform: translateY(-3px);
  border-color: var(--gold-primary);
  box-shadow: var(--shadow-md);
}

.destination-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.destination-code {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--burgundy-primary);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.destination-latency {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--moss-primary);
  background: var(--moss-tint);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--moss-primary);
}

.destination-name {
  font-size: 1.15rem;
  margin-bottom: 8px;
  color: var(--ink-primary);
}

.destination-desc {
  font-size: 0.9rem;
  color: var(--ink-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.destination-specs {
  list-style: none;
  font-size: 0.82rem;
  color: var(--ink-tertiary);
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 12px;
  border-top: 1px dashed var(--parchment-border);
}

.destination-specs li {
  display: flex;
  justify-content: space-between;
}

.destination-specs span:last-child {
  font-weight: 600;
  color: var(--ink-secondary);
}

/* Network Feature Summary Bar */
.network-summary-bar {
  background: var(--parchment-card);
  border: 1px solid var(--gold-primary);
  border-radius: var(--radius-md);
  padding: 24px 30px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  text-align: center;
}

.summary-metric {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--burgundy-primary);
  margin-bottom: 4px;
}

.summary-label {
  font-size: 0.88rem;
  color: var(--ink-secondary);
}

/* ==========================================================================
   Field Guide (AI & Streaming Guidance)
   ========================================================================== */
.field-guide-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 32px;
}

.guide-tab-btn {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  background: var(--parchment-card);
  border: 1px solid var(--parchment-border);
  color: var(--ink-secondary);
  transition: all 0.25s ease;
}

.guide-tab-btn.is-active, .guide-tab-btn:hover {
  background: var(--burgundy-primary);
  border-color: var(--gold-primary);
  color: #FFFFFF;
}

.guide-content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .guide-content-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .guide-content-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.guide-card {
  background: var(--parchment-card);
  border: 1px solid var(--parchment-border);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  transition: all 0.3s ease;
}

.guide-card:hover {
  transform: translateY(-3px);
  border-color: var(--moss-primary);
  box-shadow: var(--shadow-md);
}

.guide-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.guide-badge-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--parchment-base);
  border: 1px solid var(--parchment-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.guide-title {
  font-size: 1.2rem;
  color: var(--burgundy-primary);
  margin-bottom: 2px;
}

.guide-category {
  font-size: 0.8rem;
  color: var(--moss-primary);
  font-weight: 600;
}

.guide-body {
  font-size: 0.92rem;
  color: var(--ink-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
}

.guide-tip-box {
  background: var(--parchment-base);
  border-left: 3px solid var(--gold-primary);
  padding: 10px 12px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.82rem;
  color: var(--ink-primary);
}

.guide-tip-label {
  font-weight: 700;
  color: var(--gold-deep);
  display: block;
  margin-bottom: 2px;
}

/* ==========================================================================
   Pricing Inventory Cards
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: stretch;
  margin-bottom: 40px;
}

@media (min-width: 640px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.pricing-card {
  background: var(--parchment-card);
  border: 1px solid var(--parchment-border);
  border-radius: var(--radius-md);
  padding: 30px 22px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.pricing-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold-primary);
  box-shadow: var(--shadow-lg);
}

/* Emphasized plan */
.pricing-card.is-featured {
  border: 2px solid var(--gold-primary);
  background: var(--parchment-base);
  box-shadow: var(--shadow-parchment);
}

.featured-pill {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--gold-rich), var(--gold-deep));
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 6px rgba(197, 155, 39, 0.4);
  white-space: nowrap;
}

.pricing-plan-name {
  font-size: 1.35rem;
  margin-bottom: 6px;
  color: var(--burgundy-primary);
  text-align: center;
}

.pricing-plan-desc {
  font-size: 0.85rem;
  color: var(--ink-secondary);
  text-align: center;
  min-height: 40px;
  margin-bottom: 18px;
}

.pricing-price-wrap {
  text-align: center;
  padding: 16px 0;
  border-top: 1px dashed var(--parchment-border);
  border-bottom: 1px dashed var(--parchment-border);
  margin-bottom: 20px;
}

.price-value {
  font-family: var(--font-serif);
  font-size: 2.35rem;
  font-weight: 700;
  color: var(--burgundy-primary);
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
  line-height: 1.1;
  margin-bottom: 4px;
}

.price-currency {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--gold-deep);
}

.price-decimals {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink-secondary);
}

.price-period {
  font-size: 0.85rem;
  color: var(--ink-tertiary);
}

.price-notice {
  font-size: 0.75rem;
  color: var(--moss-primary);
  margin-top: 4px;
}

.pricing-features-list {
  list-style: none;
  font-size: 0.88rem;
  color: var(--ink-secondary);
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.pricing-feature-item svg {
  width: 16px;
  height: 16px;
  margin-top: 4px;
  color: var(--moss-primary);
  flex-shrink: 0;
}

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

.pricing-cta-wrap .btn {
  width: 100%;
}

.pricing-disclaimer {
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-tertiary);
  margin-top: 20px;
}

/* ==========================================================================
   Nine Illustrated SEO Articles Cards (3x3 Desktop, 2 Tablet, 1 Mobile)
   ========================================================================== */
.articles-section {
  background: rgba(246, 239, 230, 0.4);
  border-top: 1px solid var(--parchment-border);
  border-bottom: 1px solid var(--parchment-border);
}

.articles-grid-9 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .articles-grid-9 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .articles-grid-9 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.article-card-mini {
  background: var(--parchment-base);
  border: 1px solid var(--parchment-border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.article-card-mini:hover {
  transform: translateY(-4px);
  border-color: var(--burgundy-primary);
  box-shadow: var(--shadow-md);
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 0.78rem;
  color: var(--ink-tertiary);
}

.article-card-badge {
  background: var(--gold-tint);
  color: var(--gold-deep);
  border: 1px solid var(--gold-primary);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.article-card-title {
  font-size: 1.15rem;
  line-height: 1.45;
  margin-bottom: 10px;
}

.article-card-title a {
  color: var(--burgundy-primary);
  text-decoration: none;
}

.article-card-title a:hover {
  color: var(--burgundy-deep);
}

.article-card-excerpt {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--ink-secondary);
  margin-bottom: 16px;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--ink-tertiary);
  padding-top: 12px;
  border-top: 1px dashed var(--parchment-border);
}

.article-card-link {
  font-weight: 600;
  color: var(--burgundy-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-card-link:hover {
  color: var(--burgundy-deep);
  text-decoration: underline;
}

/* ==========================================================================
   Reviews (Demo Reviews clearly marked 示例评价)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .reviews-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.review-card {
  background: var(--parchment-card);
  border: 1px solid var(--parchment-border);
  border-radius: var(--radius-md);
  padding: 26px 22px;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.review-demo-badge {
  display: inline-block;
  font-size: 0.72rem;
  background: var(--gold-tint);
  color: var(--gold-deep);
  border: 1px solid var(--gold-primary);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  margin-bottom: 12px;
}

.review-quote {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--ink-primary);
  font-style: italic;
  margin-bottom: 18px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px dashed var(--parchment-border);
}

.author-avatar-glyph {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--parchment-base);
  border: 1px solid var(--gold-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--burgundy-primary);
}

.author-info {
  font-size: 0.85rem;
}

.author-name {
  font-weight: 700;
  color: var(--ink-primary);
}

.author-role {
  color: var(--ink-tertiary);
  font-size: 0.78rem;
}

/* ==========================================================================
   FAQ Section Accordions
   ========================================================================== */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--parchment-card);
  border: 1px solid var(--parchment-border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-item:hover {
  border-color: var(--gold-primary);
}

.faq-trigger {
  width: 100%;
  padding: 18px 22px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--burgundy-primary);
  background: none;
  cursor: pointer;
}

.faq-icon-cross {
  width: 20px;
  height: 20px;
  position: relative;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.faq-icon-cross::before, .faq-icon-cross::after {
  content: "";
  position: absolute;
  background-color: var(--gold-deep);
  border-radius: 2px;
}

.faq-icon-cross::before {
  top: 9px;
  left: 2px;
  right: 2px;
  height: 2px;
}

.faq-icon-cross::after {
  top: 2px;
  bottom: 2px;
  left: 9px;
  width: 2px;
  transition: transform 0.25s ease;
}

.faq-item.is-open .faq-icon-cross::after {
  transform: rotate(90deg);
  opacity: 0;
}

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0 22px;
}

.faq-item.is-open .faq-body {
  padding-bottom: 20px;
  max-height: 500px;
}

.faq-content {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--ink-secondary);
  border-top: 1px dashed var(--parchment-border);
  padding-top: 14px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #23201C;
  color: #D1C7BA;
  border-top: 3px solid var(--gold-primary);
  padding-top: 60px;
  padding-bottom: 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

.footer-brand h3 {
  color: #FAF5EB;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.65;
  color: #A99F92;
  margin-bottom: 18px;
}

.footer-heading {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--gold-rich);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-list a {
  color: #BDB2A3;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.footer-nav-list a:hover {
  color: var(--gold-rich);
}

.footer-disclaimer-box {
  background: #2C2824;
  border-left: 3px solid var(--gold-deep);
  padding: 14px 18px;
  font-size: 0.8rem;
  line-height: 1.6;
  color: #9E9385;
  margin-bottom: 36px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid #36322C;
  font-size: 0.82rem;
  color: #8C8274;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}

.footer-legal-links {
  display: flex;
  gap: 16px;
}

.footer-legal-links a {
  color: #A99F92;
}

.footer-legal-links a:hover {
  color: var(--gold-rich);
}

/* ==========================================================================
   Article Pages Specific Styling
   ========================================================================== */
.article-header {
  padding-top: 50px;
  padding-bottom: 30px;
  background: var(--parchment-card);
  border-bottom: 1px solid var(--parchment-border);
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--ink-tertiary);
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: var(--burgundy-primary);
}

.breadcrumb-nav span {
  color: var(--ink-tertiary);
}

.article-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--ink-tertiary);
  margin-top: 16px;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--ink-primary);
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 0;
}

.article-content h2 {
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--parchment-border);
}

.article-content h3 {
  margin-top: 28px;
  margin-bottom: 12px;
}

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

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

.article-content blockquote {
  background: var(--parchment-card);
  border-left: 4px solid var(--burgundy-primary);
  padding: 16px 20px;
  margin: 24px 0;
  font-style: italic;
  color: var(--ink-secondary);
}

.article-cta-box {
  background: var(--parchment-card);
  border: 2px solid var(--gold-primary);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  margin: 40px 0;
}

.related-articles-box {
  background: var(--parchment-card);
  border: 1px solid var(--parchment-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 40px;
}

.related-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 14px;
}

.related-links-list a {
  font-weight: 600;
  color: var(--burgundy-primary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ==========================================================================
   Reduced Motion & Print
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  .site-header, .site-footer, .header-actions, .hero-actions, .pricing-cta-wrap, .article-cta-box {
    display: none !important;
  }
  body {
    background: #FFFFFF;
    color: #000000;
  }
}


/* ==========================================================================
   Article Enhanced Components: TOC, Code, Tables, Related Cards
   ========================================================================== */

/* Table of Contents in Articles */
.article-toc-box {
  background: var(--parchment-card);
  border: 1px solid var(--parchment-border);
  border-left: 4px solid var(--gold-primary);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-sm);
}

.article-toc-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--burgundy-primary);
  margin-bottom: 12px;
}

.article-toc-list {
  padding-left: 20px;
  list-style: decimal;
  font-size: 0.95rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-toc-list a {
  color: var(--burgundy-primary);
  font-weight: 600;
}

.article-toc-list a:hover {
  color: var(--gold-deep);
  text-decoration: underline;
}

/* Article Summary Card */
.article-summary-card {
  background: var(--parchment-card);
  border: 1px solid var(--gold-primary);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 32px;
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Code & Pre Blocks */
pre {
  background: #25221E;
  color: #EDE4D8;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid #3D372F;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  margin: 20px 0;
}

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--parchment-subtle);
  color: var(--burgundy-deep);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--parchment-border);
}

pre code {
  background: none;
  color: inherit;
  padding: 0;
  border: none;
}

/* Tables inside articles */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.92rem;
  background: var(--parchment-base);
  border: 1px solid var(--parchment-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--parchment-border);
}

th {
  background: var(--parchment-card);
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--burgundy-primary);
  border-bottom: 2px solid var(--gold-primary);
}

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

tr:hover td {
  background: rgba(247, 239, 228, 0.6);
}

/* Related articles cards in article footer */
.related-articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 16px;
}

@media (min-width: 640px) {
  .related-articles-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.related-card {
  background: var(--parchment-base);
  border: 1px solid var(--parchment-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  transition: all 0.25s ease;
}

.related-card:hover {
  border-color: var(--gold-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.related-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.related-title a {
  color: var(--burgundy-primary);
}

.related-title a:hover {
  color: var(--burgundy-deep);
}