/* ==========================================================================
   DOVE加速 (DOVE ACCELERATOR) - 2026 OFFICIAL DESIGN SYSTEM
   Theme: 3D Orbiting Connection Rings · Editorial Precision Architecture
   Colors:
     - Paper White:  #FDFCF8 (Canvas surface)
     - Ink Navy:     #293A53 (Primary typography, structural frames, dark accents)
     - Muted Gold:   #B8A06D (Orbital highlights, recommended badge, accents)
     - Pale Blue:    #E7EDF3 (Secondary surface, orbital rings, borders)
   Typography:
     - Hero Heading: Chinese Songti-style serif
     - Body Text:    System sans-serif
     - Region Tags:  Monospace
   ========================================================================== */

:root {
  /* Color Palette */
  --color-paper-white: #FDFCF8;
  --color-ink-navy: #293A53;
  --color-muted-gold: #B8A06D;
  --color-pale-blue: #E7EDF3;

  /* Tonal Derivatives & Functional Colors */
  --color-navy-dark: #1D2A3D;
  --color-navy-deep: #141E2C;
  --color-navy-muted: #57687D;
  --color-navy-light: rgba(41, 58, 83, 0.08);
  --color-navy-subtle: rgba(41, 58, 83, 0.04);

  --color-gold-hover: #9E8555;
  --color-gold-light: rgba(184, 160, 109, 0.15);
  --color-gold-subtle: rgba(184, 160, 109, 0.08);

  --color-pale-blue-dark: #D4DFEC;
  --color-pale-blue-light: rgba(231, 237, 243, 0.6);

  --color-surface-pure: #FFFFFF;
  --color-border-subtle: rgba(41, 58, 83, 0.12);
  --color-border-strong: #293A53;

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

  /* Font Sizes */
  --text-h1: 56px;
  --text-h2: 36px;
  --text-h3: 24px;
  --text-h4: 20px;
  --text-body: 17px;
  --text-small: 14px;
  --text-caption: 12px;

  /* Spacing & Container */
  --container-max: 1240px;
  --container-pad: 24px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(41, 58, 83, 0.04);
  --shadow-md: 0 8px 24px rgba(41, 58, 83, 0.07);
  --shadow-lg: 0 16px 40px rgba(41, 58, 83, 0.10);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s ease;
}

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

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

body {
  background-color: var(--color-paper-white);
  color: var(--color-ink-navy);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.75;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 16px;
  background: var(--color-ink-navy);
  color: var(--color-paper-white);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  z-index: 10000;
  transition: top var(--transition-fast);
  text-decoration: none;
}
.skip-link:focus {
  top: 16px;
  outline: 2px solid var(--color-muted-gold);
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-ink-navy);
  font-weight: 700;
  line-height: 1.3;
}

p {
  margin-bottom: 1.25rem;
  color: var(--color-navy-muted);
}

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

a {
  color: var(--color-ink-navy);
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

a:hover {
  color: var(--color-muted-gold);
}

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

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

.mono-tag {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Container Utility */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(253, 252, 248, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-ink-navy);
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(41, 58, 83, 0.15);
}

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

.brand-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-ink-navy);
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--color-muted-gold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink-navy);
  padding: 6px 4px;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--color-muted-gold);
  transition: width var(--transition-fast);
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--color-ink-navy);
}

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

/* Button Component */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-ink-navy);
  color: var(--color-paper-white);
  border-color: var(--color-ink-navy);
  box-shadow: 0 4px 12px rgba(41, 58, 83, 0.15);
}

.btn-primary:hover {
  background-color: var(--color-navy-dark);
  color: var(--color-paper-white);
  box-shadow: 0 6px 18px rgba(41, 58, 83, 0.25);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-ink-navy);
  border-color: var(--color-border-subtle);
}

.btn-secondary:hover {
  background-color: var(--color-pale-blue-light);
  border-color: var(--color-ink-navy);
  color: var(--color-ink-navy);
}

.btn-gold {
  background-color: var(--color-muted-gold);
  color: #FFFFFF;
  border-color: var(--color-muted-gold);
  font-weight: 600;
}

.btn-gold:hover {
  background-color: var(--color-gold-hover);
  border-color: var(--color-gold-hover);
  color: #FFFFFF;
  box-shadow: 0 6px 16px rgba(184, 160, 109, 0.3);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-lg {
  padding: 14px 30px;
  font-size: 16px;
}

/* Mobile Menu Toggle */
.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  cursor: pointer;
  color: var(--color-ink-navy);
}

.mobile-menu-btn svg {
  width: 22px;
  height: 22px;
}

/* HERO SECTION */
.hero-section {
  padding: 70px 0 80px 0;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border-subtle);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

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

.hero-badge-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-pale-blue);
  border: 1px solid rgba(41, 58, 83, 0.15);
  border-radius: var(--radius-full);
  padding: 6px 16px;
  align-self: flex-start;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-muted-gold);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(184, 160, 109, 0.25);
}

.hero-badge-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink-navy);
  letter-spacing: 0.02em;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: var(--text-h1); /* 56px desktop */
  line-height: 1.18;
  color: var(--color-ink-navy);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-title .highlight-gold {
  color: var(--color-muted-gold);
  font-style: normal;
}

.hero-intro {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-navy-muted);
  max-width: 600px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}

.hero-specs-row {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 16px;
  padding-top: 20px;
  border-top: 1px dashed var(--color-border-subtle);
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-value {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-ink-navy);
}

.spec-label {
  font-size: 12px;
  color: var(--color-navy-muted);
}

/* HERO DASHBOARD: 3D ORBITING CONNECTION RINGS */
.hero-dashboard-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.dashboard-stage {
  position: relative;
  width: 100%;
  max-width: 460px;
  aspect-ratio: 1 / 1;
  perspective: 900px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, rgba(231, 237, 243, 0.45) 0%, rgba(253, 252, 248, 0) 72%);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: inset 0 0 40px rgba(231, 237, 243, 0.35);
}

.orbit-system {
  position: relative;
  width: 320px;
  height: 320px;
  transform-style: preserve-3d;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Center Hub */
.orbit-hub {
  position: absolute;
  width: 64px;
  height: 64px;
  background-color: var(--color-ink-navy);
  border: 2px solid var(--color-muted-gold);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 20;
  box-shadow: 0 4px 16px rgba(41, 58, 83, 0.3);
}

.hub-brand {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-paper-white);
  line-height: 1;
}

.hub-sub {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--color-muted-gold);
  margin-top: 2px;
}

/* Three Elliptical Orbit Rings with rotateX and slow independent rotation */
.orbit-ring {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  transform-style: preserve-3d;
  will-change: transform;
}

/* Ring 1 - Primary Gold Plane */
.orbit-ring-1 {
  width: 290px;
  height: 290px;
  border: 1.8px dashed var(--color-muted-gold);
  animation: orbitRotate1 28s linear infinite;
}

/* Ring 2 - Navy Transverse Plane */
.orbit-ring-2 {
  width: 260px;
  height: 260px;
  border: 1.8px solid rgba(41, 58, 83, 0.65);
  animation: orbitRotate2 36s linear infinite;
}

/* Ring 3 - Pale Blue Oblique Plane */
.orbit-ring-3 {
  width: 230px;
  height: 230px;
  border: 1.8px dotted var(--color-navy-muted);
  animation: orbitRotate3 44s linear infinite;
}

/* Orbit Rotations using CSS rotateX */
@keyframes orbitRotate1 {
  0% {
    transform: rotateX(62deg) rotateY(15deg) rotateZ(0deg);
  }
  100% {
    transform: rotateX(62deg) rotateY(15deg) rotateZ(360deg);
  }
}

@keyframes orbitRotate2 {
  0% {
    transform: rotateX(58deg) rotateY(-25deg) rotateZ(360deg);
  }
  100% {
    transform: rotateX(58deg) rotateY(-25deg) rotateZ(0deg);
  }
}

@keyframes orbitRotate3 {
  0% {
    transform: rotateX(70deg) rotateY(40deg) rotateZ(0deg);
  }
  100% {
    transform: rotateX(70deg) rotateY(40deg) rotateZ(360deg);
  }
}

/* Regional Dots placed along orbit rings */
.orbit-dot {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 6px;
  pointer-events: auto;
  transform: translate(-50%, -50%);
}

.dot-beacon {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-ink-navy);
  border: 2px solid var(--color-paper-white);
  box-shadow: 0 0 0 1px var(--color-muted-gold);
}

.orbit-ring-1 .dot-beacon {
  background-color: var(--color-muted-gold);
}

.orbit-ring-2 .dot-beacon {
  background-color: var(--color-ink-navy);
}

.orbit-ring-3 .dot-beacon {
  background-color: var(--color-navy-muted);
}

/* Region Tag - kept strictly legible */
.dot-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-ink-navy);
  background-color: rgba(253, 252, 248, 0.95);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-border-subtle);
  white-space: nowrap;
  box-shadow: 0 1px 4px rgba(41, 58, 83, 0.08);
}

/* Dot Positions on Ring 1 (290px circle) */
.dot-hk { top: 0%; left: 50%; }
.dot-sg { top: 100%; left: 50%; }

/* Dot Positions on Ring 2 (260px circle) */
.dot-jp { top: 50%; left: 0%; }
.dot-us { top: 50%; left: 100%; }

/* Dot Positions on Ring 3 (230px circle) */
.dot-uk { top: 15%; left: 85%; }
.dot-de { top: 85%; left: 15%; }

/* Dashboard Notice */
.dashboard-notice {
  margin-top: 12px;
  font-size: 12px;
  color: var(--color-navy-muted);
  text-align: center;
  line-height: 1.5;
}

/* Paused state for offscreen */
.is-paused .orbit-ring-1,
.is-paused .orbit-ring-2,
.is-paused .orbit-ring-3 {
  animation-play-state: paused !important;
}

/* SECTION COMMONS */
.section-padding {
  padding: 88px 0;
}

.section-padding-alt {
  padding: 88px 0;
  background-color: #FAF9F5;
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.section-head {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 56px auto;
}

.section-overline {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-muted-gold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: inline-block;
}

.section-title {
  font-family: var(--font-serif);
  font-size: var(--text-h2);
  color: var(--color-ink-navy);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 17px;
  color: var(--color-navy-muted);
  line-height: 1.7;
}

/* THREE ADVANTAGES: Open Numbered Sections */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.advantage-item {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 0 16px 24px 0;
  border-right: 1px solid var(--color-border-subtle);
}

.advantage-item:last-child {
  border-right: none;
  padding-right: 0;
}

.adv-num {
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 700;
  color: var(--color-muted-gold);
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.9;
}

.adv-title {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--color-ink-navy);
  margin-bottom: 14px;
}

.adv-desc {
  font-size: 15px;
  color: var(--color-navy-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.adv-points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.adv-point {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-ink-navy);
}

.adv-point::before {
  content: '';
  width: 6px;
  height: 6px;
  background-color: var(--color-muted-gold);
  border-radius: 50%;
  flex-shrink: 0;
}

/* RADIAL NODES DIRECTORY & LINEAR MOBILE */
.nodes-section-content {
  position: relative;
}

/* Desktop Radial Directory */
.radial-directory-desktop {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  aspect-ratio: 16 / 9;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, rgba(231, 237, 243, 0.4) 0%, rgba(253, 252, 248, 0) 70%);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.radial-center-core {
  position: absolute;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: var(--color-ink-navy);
  border: 3px solid var(--color-muted-gold);
  color: var(--color-paper-white);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  z-index: 10;
  box-shadow: 0 8px 24px rgba(41, 58, 83, 0.25);
}

.core-title {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
}

.core-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-muted-gold);
  margin-top: 4px;
}

.radial-track {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed var(--color-border-subtle);
  pointer-events: none;
}

.radial-track-1 { width: 340px; height: 340px; }
.radial-track-2 { width: 560px; height: 560px; }

/* Radial Node Item */
.radial-node-card {
  position: absolute;
  background: var(--color-surface-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  width: 170px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
  z-index: 5;
}

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

.node-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.node-code {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-ink-navy);
}

.node-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-muted-gold);
}

.node-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink-navy);
  margin-bottom: 4px;
}

.node-routing {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-navy-muted);
}

/* Positions around the radial center */
.pos-hk { top: 12%; left: 16%; }
.pos-jp { top: 10%; right: 16%; }
.pos-sg { top: 52%; left: 6%; }
.pos-us { top: 52%; right: 6%; }
.pos-uk { bottom: 10%; left: 20%; }
.pos-de { bottom: 10%; right: 20%; }

/* Mobile Linear Nodes (hidden on desktop) */
.linear-nodes-mobile {
  display: none;
  flex-direction: column;
  gap: 12px;
}

.linear-node-card {
  background: var(--color-surface-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.linear-node-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.linear-code {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-ink-navy);
  background: var(--color-pale-blue);
  padding: 4px 8px;
  border-radius: 4px;
}

.linear-meta {
  display: flex;
  flex-direction: column;
}

.linear-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink-navy);
}

.linear-desc {
  font-size: 12px;
  color: var(--color-navy-muted);
}

.linear-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-muted-gold);
  background: var(--color-gold-subtle);
  border: 1px solid rgba(184, 160, 109, 0.25);
  padding: 2px 8px;
  border-radius: 4px;
}

.nodes-disclaimer-box {
  margin-top: 24px;
  padding: 14px 20px;
  background-color: var(--color-pale-blue-light);
  border: 1px solid rgba(41, 58, 83, 0.12);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--color-navy-muted);
  line-height: 1.6;
}

/* AI & STREAMING: TWO DISTINCT SCENARIOS */
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.scenario-card {
  background: var(--color-surface-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.scenario-card:hover {
  border-color: var(--color-muted-gold);
  box-shadow: var(--shadow-md);
}

.scenario-icon-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-ink-navy);
  background-color: var(--color-pale-blue);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
  align-self: flex-start;
}

.scenario-title {
  font-family: var(--font-serif);
  font-size: 26px;
  color: var(--color-ink-navy);
  margin-bottom: 14px;
}

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

.app-pill-cluster {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.app-pill {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  background: var(--color-paper-white);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  color: var(--color-ink-navy);
}

.scenario-deep-details {
  background-color: #FAF9F5;
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  margin-top: auto;
}

.scenario-deep-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink-navy);
  margin-bottom: 8px;
}

.scenario-deep-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scenario-deep-item {
  font-size: 13px;
  color: var(--color-navy-muted);
  line-height: 1.6;
  position: relative;
  padding-left: 14px;
}

.scenario-deep-item::before {
  content: '▪';
  position: absolute;
  left: 0;
  color: var(--color-muted-gold);
  font-size: 14px;
}

/* PRICING SECTION */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--color-surface-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.pricing-card:hover {
  border-color: var(--color-ink-navy);
}

/* Recommended Tier with visible "推荐套餐" */
.pricing-card-recommended {
  border: 2px solid var(--color-muted-gold);
  box-shadow: 0 12px 32px rgba(184, 160, 109, 0.15);
  background: #FFFFFD;
  transform: scale(1.02);
  z-index: 2;
}

.pricing-badge-recommended {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-muted-gold);
  color: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  box-shadow: 0 2px 8px rgba(184, 160, 109, 0.35);
  white-space: nowrap;
}

.pricing-name {
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--color-ink-navy);
  margin-bottom: 6px;
}

.pricing-desc {
  font-size: 13px;
  color: var(--color-navy-muted);
  min-height: 40px;
  margin-bottom: 16px;
}

.pricing-rate-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.pricing-symbol {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink-navy);
}

.pricing-amount {
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 700;
  color: var(--color-ink-navy);
  line-height: 1;
}

.pricing-period {
  font-size: 13px;
  color: var(--color-navy-muted);
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0 0 28px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
}

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

.pricing-feature svg {
  width: 16px;
  height: 16px;
  margin-top: 2px;
  color: var(--color-muted-gold);
  flex-shrink: 0;
}

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

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

.pricing-editorial-note {
  margin-top: 28px;
  text-align: center;
  font-size: 12px;
  color: var(--color-navy-muted);
  line-height: 1.6;
}

/* NINE SEO ARTICLES CARDS (3/2/1 Columns) */
.articles-section {
  padding: 88px 0;
}

.seo-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* 3 cols desktop */
  gap: 28px;
}

.article-card {
  background: var(--color-surface-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-ink-navy);
  box-shadow: var(--shadow-md);
}

.article-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.article-category {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-muted-gold);
  background: var(--color-gold-subtle);
  border: 1px solid rgba(184, 160, 109, 0.2);
  padding: 3px 8px;
  border-radius: 4px;
}

.article-readtime {
  font-size: 12px;
  color: var(--color-navy-muted);
}

.article-title {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--color-ink-navy);
  line-height: 1.4;
  margin-bottom: 12px;
  transition: color var(--transition-fast);
}

.article-card:hover .article-title {
  color: var(--color-muted-gold);
}

.article-excerpt {
  font-size: 14px;
  color: var(--color-navy-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-link-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink-navy);
  margin-top: auto;
}

.article-card:hover .article-link-action {
  color: var(--color-muted-gold);
}

/* TESTIMONIALS (3-6 labeled-sample testimonials) */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--color-surface-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
}

.test-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-navy-muted);
  background: var(--color-pale-blue);
  padding: 2px 8px;
  border-radius: 4px;
  align-self: flex-start;
  margin-bottom: 16px;
}

.test-quote {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-ink-navy);
  margin-bottom: 20px;
  flex-grow: 1;
  font-style: italic;
}

.test-author-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border-subtle);
}

.test-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-pale-blue);
  border: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-ink-navy);
  font-size: 15px;
}

.test-author-info {
  display: flex;
  flex-direction: column;
}

.test-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink-navy);
}

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

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

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

.faq-item {
  background: var(--color-surface-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-ink-navy);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink-navy);
  gap: 16px;
}

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

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

.faq-answer {
  display: none;
  padding: 0 24px 20px 24px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-navy-muted);
  border-top: 1px dashed var(--color-border-subtle);
  margin-top: -4px;
  padding-top: 16px;
}

.faq-item.active .faq-answer {
  display: block;
}

/* FOOTER */
.site-footer {
  background-color: var(--color-navy-dark);
  color: #E2E8F0;
  padding: 72px 0 36px 0;
  border-top: 1px solid var(--color-navy-deep);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 56px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-brand-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-paper-white);
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #94A3B8;
  max-width: 320px;
}

.footer-col-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-paper-white);
  margin-bottom: 20px;
  position: relative;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: 14px;
  color: #CBD5E1;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-muted-gold);
}

/* PBN Friendly Links in Footer */
.pbn-bar {
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 28px;
  text-align: center;
}

.pbn-label {
  font-size: 13px;
  color: #94A3B8;
  margin-right: 12px;
}

.pbn-link {
  color: var(--color-muted-gold);
  font-size: 14px;
  font-weight: 600;
  margin: 0 10px;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color var(--transition-fast);
}

.pbn-link:hover {
  color: #E5D5B0;
}

.footer-bottom {
  text-align: center;
  font-size: 13px;
  color: #64748B;
  line-height: 1.6;
}

/* ARTICLE / CONTENT PAGES STYLING */
.content-page-hero {
  padding: 60px 0 40px 0;
  background-color: #FAF9F5;
  border-bottom: 1px solid var(--color-border-subtle);
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-navy-muted);
  margin-bottom: 20px;
}

.breadcrumb-nav a {
  color: var(--color-navy-muted);
}

.breadcrumb-nav a:hover {
  color: var(--color-muted-gold);
}

.breadcrumb-separator {
  color: #A0AEC0;
}

.content-page-title {
  font-family: var(--font-serif);
  font-size: 40px;
  line-height: 1.25;
  color: var(--color-ink-navy);
  margin-bottom: 16px;
}

.content-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--color-navy-muted);
  padding-top: 12px;
}

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

.content-article-body {
  padding: 60px 0 80px 0;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 56px;
  align-items: start;
}

.article-main {
  font-size: 17px;
  line-height: 1.85;
  color: #2D3748;
}

.article-main h2 {
  font-family: var(--font-serif);
  font-size: 26px;
  color: var(--color-ink-navy);
  margin: 44px 0 18px 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.article-main h3 {
  font-size: 20px;
  color: var(--color-ink-navy);
  margin: 32px 0 14px 0;
}

.article-main p {
  margin-bottom: 20px;
  color: #334155;
}

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

.article-main li {
  margin-bottom: 8px;
  color: #334155;
}

.article-callout {
  background-color: var(--color-pale-blue-light);
  border-left: 4px solid var(--color-ink-navy);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 22px;
  margin: 28px 0;
  font-size: 15px;
}

.article-callout-gold {
  background-color: var(--color-gold-subtle);
  border-left-color: var(--color-muted-gold);
}

.article-cta-box {
  background: #FAF9F5;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 40px 0;
  text-align: center;
}

.article-sidebar {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sidebar-widget {
  background: var(--color-surface-pure);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-title {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-ink-navy);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.sidebar-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-link-item a {
  font-size: 14px;
  color: var(--color-navy-muted);
  line-height: 1.5;
  display: block;
}

.sidebar-link-item a:hover {
  color: var(--color-muted-gold);
}

/* RESPONSIVE MEDIA QUERIES */
/* 1024px - 1440px Desktop Adjustments */
@media (max-width: 1024px) {
  :root {
    --text-h1: 46px;
    --text-h2: 32px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-dashboard-wrap {
    order: -1;
  }
  .dashboard-stage {
    max-width: 380px;
  }
  .advantages-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .advantage-item {
    border-right: none;
    border-bottom: 1px solid var(--color-border-subtle);
    padding-bottom: 24px;
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .seo-articles-grid {
    grid-template-columns: repeat(2, 1fr); /* 2 cols tablet */
  }
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
}

/* 768px Tablet & Large Mobile */
@media (max-width: 768px) {
  :root {
    --text-h1: 36px; /* H1 36px mobile as required */
    --text-h2: 28px;
    --text-body: 16px;
  }
  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--color-paper-white);
    border-bottom: 1px solid var(--color-border-subtle);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    display: none;
    box-shadow: 0 10px 24px rgba(41, 58, 83, 0.12);
  }
  .main-nav.is-open {
    display: flex;
  }
  .nav-links {
    flex-direction: column;
    width: 100%;
    gap: 16px;
  }
  .nav-link {
    font-size: 16px;
    width: 100%;
  }
  .mobile-menu-btn {
    display: block;
  }
  .header-actions {
    display: none;
  }
  .main-nav .header-actions {
    display: flex;
    width: 100%;
    margin-top: 12px;
  }
  .main-nav .header-actions .btn {
    width: 100%;
  }
  .radial-directory-desktop {
    display: none;
  }
  .linear-nodes-mobile {
    display: flex;
  }
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card-recommended {
    transform: none;
  }
  .seo-articles-grid {
    grid-template-columns: 1fr; /* 1 col mobile */
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* 430px, 390px, 375px Narrow Mobile Screens */
@media (max-width: 430px) {
  :root {
    --container-pad: 16px;
  }
  .hero-title {
    font-size: 34px;
  }
  .dashboard-stage {
    max-width: 320px;
    padding: 10px;
  }
  .orbit-system {
    width: 260px;
    height: 260px;
  }
  .orbit-ring-1 { width: 240px; height: 240px; }
  .orbit-ring-2 { width: 210px; height: 210px; }
  .orbit-ring-3 { width: 180px; height: 180px; }
  .orbit-hub { width: 54px; height: 54px; }
  .hub-brand { font-size: 12px; }
  .dot-tag { font-size: 9px; padding: 1px 4px; }
  .hero-cta-group {
    flex-direction: column;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
}

/* Reduced Motion Mode */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .orbit-ring {
    animation: none !important;
  }
}