/* ==========================================================================
   可可云 (KeKeyun) - 2026 OFFICIAL DESIGN SYSTEM
   Theme: Restrained 3D Flip Dashboard · Editorial Architecture
   Palette:
     - Ivory:       #FCFAF4 (Canvas surface)
     - Deep Plum:   #4C4058 (Primary headings, structural frames, dark accents)
     - Muted Mint:  #A6C8BC (Accent badges, route status, hover borders)
     - Charcoal:    #2D3033 (Neutral body typography, crisp technical elements)
   ========================================================================== */

:root {
  /* Core Palette */
  --color-ivory: #FCFAF4;
  --color-ivory-warm: #F6F3EB;
  --color-ivory-dark: #EDE8DE;
  --color-plum: #4C4058;
  --color-plum-deep: #382E42;
  --color-plum-light: rgba(76, 64, 88, 0.08);
  --color-plum-medium: rgba(76, 64, 88, 0.16);
  --color-mint: #A6C8BC;
  --color-mint-dark: #7FA799;
  --color-mint-light: rgba(166, 200, 188, 0.22);
  --color-mint-subtle: rgba(166, 200, 188, 0.12);
  --color-charcoal: #2D3033;
  --color-charcoal-muted: #5F6368;
  --color-charcoal-light: #8A8D91;
  --color-white: #FFFFFF;

  /* Typography */
  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Sizing */
  --text-h1: 50px;
  --text-h2: 32px;
  --text-h3: 22px;
  --text-h4: 18px;
  --text-body: 18px;
  --text-small: 15px;
  --text-caption: 13px;

  /* Borders & Radius */
  --border-subtle: rgba(76, 64, 88, 0.14);
  --border-strong: #4C4058;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  /* Layout */
  --container-max: 1240px;
  --container-pad: 24px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background-color: var(--color-ivory);
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--color-charcoal);
  background-color: var(--color-ivory);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Headings: Rounded Chinese system sans-serif */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-plum);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--text-h1);
}

h2 {
  font-size: var(--text-h2);
}

h3 {
  font-size: var(--text-h3);
}

p {
  margin-bottom: 1.15rem;
}

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

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

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

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

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--color-plum);
  color: var(--color-ivory);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  z-index: 9999;
  font-weight: 600;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 15px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
  text-align: center;
  line-height: 1.3;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--color-plum);
  color: var(--color-ivory);
  border-color: var(--color-plum);
  box-shadow: 0 4px 12px rgba(76, 64, 88, 0.2);
}
.btn-primary:hover, .btn-primary:focus-visible {
  background-color: var(--color-plum-deep);
  color: var(--color-ivory);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(76, 64, 88, 0.28);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-plum);
  border-color: var(--color-plum);
}
.btn-secondary:hover, .btn-secondary:focus-visible {
  background-color: var(--color-plum-light);
  transform: translateY(-2px);
}

.btn-mint {
  background-color: var(--color-mint);
  color: var(--color-charcoal);
  border-color: var(--color-mint);
  box-shadow: 0 4px 12px rgba(166, 200, 188, 0.35);
}
.btn-mint:hover, .btn-mint:focus-visible {
  background-color: var(--color-mint-dark);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 18px;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(252, 250, 244, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color 0.2s ease;
}

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

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 800;
  color: var(--color-plum);
  text-decoration: none;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--color-plum);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-mint);
  font-size: 19px;
  font-weight: 700;
  flex-shrink: 0;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-charcoal);
  position: relative;
  padding: 6px 0;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-plum);
  transition: width 0.2s ease;
}

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

.header-cta-group {
  display: none;
  align-items: center;
  gap: 14px;
}

/* Mobile Nav Toggle */
.mobile-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-plum);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.mobile-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.mobile-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Dropdown Menu */
.mobile-nav {
  display: none;
  padding: 20px 0 28px;
  background-color: var(--color-ivory);
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.mobile-nav-link {
  display: block;
  padding: 10px 14px;
  font-size: 17px;
  font-weight: 500;
  color: var(--color-charcoal);
  border-radius: var(--radius-sm);
}

.mobile-nav-link:hover, .mobile-nav-link:focus-visible {
  background-color: var(--color-plum-light);
  color: var(--color-plum);
}

.mobile-nav-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 10px;
}

/* ==========================================================================
   HERO SECTION with RESTRAINED 3D FLIP DASHBOARD
   ========================================================================== */
.hero-section {
  padding: 60px 0 80px;
  background: linear-gradient(180deg, var(--color-ivory) 0%, var(--color-ivory-warm) 100%);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  max-width: 620px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background-color: var(--color-mint-light);
  border: 1px solid var(--color-mint);
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-plum);
  margin-bottom: 20px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-mint-dark);
}

.hero-title {
  font-size: 34px;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--color-plum);
}

.hero-desc {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-charcoal);
  margin-bottom: 32px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 28px;
}

.hero-notice {
  font-size: 13px;
  color: var(--color-charcoal-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 3D Dashboard Container */
.hero-dashboard-wrap {
  perspective: 1200px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px 0;
}

.hero-dashboard {
  width: 100%;
  max-width: 500px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transform-style: preserve-3d;
}

/* Three Hinged Panels */
.hinged-panel {
  position: relative;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  box-shadow: 0 10px 30px rgba(76, 64, 88, 0.08), 0 1px 3px rgba(45, 48, 51, 0.05);
  border: 1px solid var(--border-subtle);
  transform-style: preserve-3d;
  transform-origin: top center;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.4s ease;
}

/* Panel 1 Tilt & Slow Animation */
.panel-1 {
  animation: panelTilt1 10s ease-in-out infinite alternate;
  border-left: 4px solid var(--color-plum);
}

/* Panel 2 Tilt & Slow Animation */
.panel-2 {
  animation: panelTilt2 11s ease-in-out infinite alternate 1.5s;
  background-color: #FAF8F2;
  border-left: 4px solid var(--color-mint-dark);
}

/* Panel 3 Tilt & Slow Animation */
.panel-3 {
  animation: panelTilt3 12s ease-in-out infinite alternate 3s;
  border-left: 4px solid var(--color-charcoal);
}

@keyframes panelTilt1 {
  0% { transform: rotateX(2deg) rotateY(-3deg) translateZ(0); }
  50% { transform: rotateX(-1deg) rotateY(2deg) translateZ(4px); }
  100% { transform: rotateX(3deg) rotateY(-2deg) translateZ(0); }
}

@keyframes panelTilt2 {
  0% { transform: rotateX(-2deg) rotateY(3deg) translateZ(4px); }
  50% { transform: rotateX(2deg) rotateY(-2deg) translateZ(8px); }
  100% { transform: rotateX(-1deg) rotateY(2deg) translateZ(4px); }
}

@keyframes panelTilt3 {
  0% { transform: rotateX(1deg) rotateY(-2deg) translateZ(2px); }
  50% { transform: rotateX(-3deg) rotateY(3deg) translateZ(6px); }
  100% { transform: rotateX(2deg) rotateY(-1deg) translateZ(2px); }
}

/* Hover/Focus gentle tilt without flipping */
.hinged-panel:hover, .hinged-panel:focus-within {
  transform: rotateX(0deg) rotateY(0deg) translateZ(12px) scale(1.02);
  box-shadow: 0 16px 36px rgba(76, 64, 88, 0.14);
}

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

.panel-region {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--color-plum);
}

.panel-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--color-plum-light);
  color: var(--color-plum);
}

.panel-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-charcoal-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #2E7D32;
}

/* Route visualization line */
.route-svg {
  width: 100%;
  height: 28px;
  margin: 8px 0;
}

.panel-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--color-charcoal-muted);
  border-top: 1px dashed var(--border-subtle);
  padding-top: 10px;
  margin-top: 6px;
}

.panel-meta strong {
  color: var(--color-charcoal);
  font-family: var(--font-mono);
}

/* ==========================================================================
   ADVANTAGES SECTION (Open typography with small tilting diagrams)
   ========================================================================== */
.section {
  padding: 80px 0;
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-plum);
  background-color: var(--color-mint-light);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.section-title {
  margin-bottom: 16px;
}

.section-desc {
  font-size: 18px;
  color: var(--color-charcoal-muted);
  line-height: 1.6;
}

.benefits-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.benefit-card {
  background-color: var(--color-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: 0 4px 16px rgba(76, 64, 88, 0.04);
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.benefit-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(76, 64, 88, 0.08);
  border-color: var(--color-plum-medium);
}

.benefit-diagram {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  background-color: var(--color-ivory-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transform: perspective(600px) rotateX(6deg) rotateY(-6deg);
  transition: transform 0.35s ease;
  border: 1px solid var(--border-subtle);
}

.benefit-card:hover .benefit-diagram {
  transform: perspective(600px) rotateX(-4deg) rotateY(4deg) scale(1.05);
}

.benefit-title {
  font-size: 22px;
  margin-bottom: 14px;
}

.benefit-text {
  font-size: 16px;
  color: var(--color-charcoal);
  line-height: 1.65;
  margin-bottom: 0;
}

/* ==========================================================================
   GLOBAL NODES SECTION (Static readable list, illustrative labels)
   ========================================================================== */
.nodes-section {
  background-color: var(--color-ivory-warm);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.nodes-disclaimer {
  text-align: center;
  font-size: 14px;
  color: var(--color-charcoal-muted);
  margin-top: -36px;
  margin-bottom: 40px;
}

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

.node-row {
  background-color: var(--color-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  align-items: center;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.node-row:hover {
  border-color: var(--color-plum);
  box-shadow: 0 4px 14px rgba(76, 64, 88, 0.06);
}

.node-main {
  display: flex;
  align-items: center;
  gap: 16px;
}

.node-flag-tag {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background-color: var(--color-plum);
  color: var(--color-ivory);
  letter-spacing: 0.04em;
}

.node-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-plum);
}

.node-desc {
  font-size: 15px;
  color: var(--color-charcoal);
}

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

.node-badge {
  font-size: 12px;
  font-family: var(--font-mono);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--color-ivory-dark);
  color: var(--color-charcoal);
}

.node-status-text {
  font-size: 13px;
  color: var(--color-charcoal-muted);
  text-align: left;
}

/* ==========================================================================
   AI & STREAMING SCENARIOS (Two contrasting scenario areas)
   ========================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

/* Contrasting Area 1: Deep Plum Card for AI & Developer */
.scenario-area-ai {
  background: var(--color-plum-deep);
  color: var(--color-ivory);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: 0 12px 36px rgba(56, 46, 66, 0.25);
  border: 1px solid var(--color-plum);
}

.scenario-area-ai h3 {
  color: var(--color-ivory);
  margin-bottom: 12px;
}

.scenario-area-ai .scenario-tag {
  background-color: var(--color-mint);
  color: var(--color-charcoal);
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.scenario-area-ai .scenario-lead {
  color: #D3CFD8;
  font-size: 16px;
  margin-bottom: 28px;
}

/* Contrasting Area 2: Ivory/Mint Card for Streaming & Audio */
.scenario-area-media {
  background: var(--color-white);
  color: var(--color-charcoal);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: 0 10px 30px rgba(76, 64, 88, 0.08);
  border: 2px solid var(--color-mint);
}

.scenario-area-media h3 {
  color: var(--color-plum);
  margin-bottom: 12px;
}

.scenario-area-media .scenario-tag {
  background-color: var(--color-plum-light);
  color: var(--color-plum);
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.scenario-area-media .scenario-lead {
  color: var(--color-charcoal-muted);
  font-size: 16px;
  margin-bottom: 28px;
}

/* Tool Items Inside Scenarios */
.tools-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tool-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease;
}

.scenario-area-ai .tool-item {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.scenario-area-ai .tool-item:hover {
  background-color: rgba(255, 255, 255, 0.12);
}

.scenario-area-media .tool-item {
  background-color: var(--color-ivory);
  border: 1px solid var(--border-subtle);
}
.scenario-area-media .tool-item:hover {
  background-color: var(--color-ivory-warm);
  border-color: var(--color-mint-dark);
}

.tool-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-weight: 800;
  font-size: 16px;
}

.scenario-area-ai .tool-icon {
  background-color: var(--color-mint);
  color: var(--color-charcoal);
}

.scenario-area-media .tool-icon {
  background-color: var(--color-plum);
  color: var(--color-ivory);
}

.tool-content {
  flex: 1;
}

.tool-name {
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 4px;
}

.scenario-area-ai .tool-name {
  color: var(--color-ivory);
}

.scenario-area-media .tool-name {
  color: var(--color-plum);
}

.tool-desc {
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 0;
}

.scenario-area-ai .tool-desc {
  color: #C5C1CC;
}

.scenario-area-media .tool-desc {
  color: var(--color-charcoal-muted);
}

/* ==========================================================================
   PRICING SECTION (Flat and legible, 4-5 tiers, 1 recommended)
   ========================================================================== */
.pricing-section {
  background-color: var(--color-ivory-warm);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.pricing-notice {
  text-align: center;
  font-size: 14px;
  color: var(--color-charcoal-muted);
  max-width: 820px;
  margin: -32px auto 44px;
}

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

.pricing-card {
  background-color: var(--color-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 34px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: 0 4px 14px rgba(76, 64, 88, 0.04);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(76, 64, 88, 0.08);
}

/* Exactly one 推荐套餐 */
.pricing-card-recommended {
  border: 2px solid var(--color-plum);
  background-color: #FAF8F3;
  box-shadow: 0 8px 28px rgba(76, 64, 88, 0.12);
}

.pricing-badge-recommended {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-plum);
  color: var(--color-ivory);
  font-size: 13px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.04em;
  box-shadow: 0 2px 8px rgba(76, 64, 88, 0.25);
}

.pricing-name {
  font-size: 22px;
  margin-bottom: 8px;
}

.pricing-desc {
  font-size: 14px;
  color: var(--color-charcoal-muted);
  min-height: 42px;
  margin-bottom: 20px;
}

.pricing-rate-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.pricing-symbol {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-plum);
}

.pricing-amount {
  font-size: 44px;
  font-weight: 800;
  color: var(--color-plum);
  line-height: 1;
  font-family: var(--font-heading);
}

.pricing-period {
  font-size: 15px;
  color: var(--color-charcoal-muted);
}

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

.pricing-feature {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--color-charcoal);
  line-height: 1.45;
}

.pricing-feature svg {
  width: 18px;
  height: 18px;
  color: var(--color-mint-dark);
  flex-shrink: 0;
  margin-top: 2px;
}

.editorial-tag {
  display: inline-block;
  font-size: 11px;
  font-family: var(--font-mono);
  padding: 2px 6px;
  border-radius: 4px;
  background-color: var(--color-ivory-dark);
  color: var(--color-charcoal-muted);
  margin-left: 4px;
}

/* ==========================================================================
   ARTICLE CARDS SECTION (Below pricing, 3 col desktop / 2 tablet / 1 mobile)
   Hinged-corner decoration!
   ========================================================================== */
.articles-section {
  padding: 80px 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.article-card {
  position: relative;
  background-color: var(--color-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px 26px 26px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 16px rgba(76, 64, 88, 0.04);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  overflow: hidden;
}

/* Hinged-corner decoration (folded geometric flap with restrained 3D hint) */
.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, transparent 50%, var(--color-mint-light) 50%);
  border-bottom-left-radius: 6px;
  transition: transform 0.3s ease;
}

.article-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 14px;
  height: 14px;
  background: var(--color-plum);
  clip-path: polygon(100% 0, 0 100%, 100% 100%);
  opacity: 0.75;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(76, 64, 88, 0.09);
  border-color: var(--color-plum-medium);
}

.article-card:hover::after {
  opacity: 1;
  transform: scale(1.1);
}

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

.article-category {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-plum);
  background-color: var(--color-ivory-warm);
  padding: 3px 8px;
  border-radius: 4px;
}

.article-date {
  font-size: 13px;
  color: var(--color-charcoal-light);
}

.article-card-title {
  font-size: 19px;
  line-height: 1.35;
  margin-bottom: 12px;
}

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

.article-card-desc {
  font-size: 15px;
  color: var(--color-charcoal-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.article-card-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-plum);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
}

.article-card-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.article-card-link:hover svg {
  transform: translateX(4px);
}

/* ==========================================================================
   TESTIMONIALS SECTION (Clearly sample feedback, no fake ratings)
   ========================================================================== */
.testimonials-section {
  background-color: var(--color-ivory-warm);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

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

.testimonial-card {
  background-color: var(--color-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-text {
  font-size: 16px;
  color: var(--color-charcoal);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

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

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-plum-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-plum);
  font-size: 15px;
}

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

.author-name {
  font-weight: 700;
  font-size: 15px;
  color: var(--color-plum);
}

.author-role {
  font-size: 13px;
  color: var(--color-charcoal-muted);
}

/* ==========================================================================
   FAQ SECTION (Accessible Collapsible Q&A)
   ========================================================================== */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item[open] {
  border-color: var(--color-plum);
}

.faq-summary {
  padding: 20px 24px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-plum);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  user-select: none;
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-plum);
  transition: transform 0.25s ease;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 16px;
  color: var(--color-charcoal);
  line-height: 1.7;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   FOOTER (Site links + External dofollow PBN links)
   ========================================================================== */
.site-footer {
  background-color: var(--color-plum-deep);
  color: var(--color-ivory);
  padding: 60px 0 32px;
  margin-top: auto;
  border-top: 1px solid var(--color-plum);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-bottom: 48px;
}

.footer-brand h4 {
  color: var(--color-ivory);
  font-size: 20px;
  margin-bottom: 12px;
}

.footer-brand p {
  color: #C5C1CC;
  font-size: 15px;
  line-height: 1.6;
  max-width: 380px;
}

.footer-nav-title {
  color: var(--color-mint);
  font-size: 15px;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

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

.footer-nav-link {
  color: #D3CFD8;
  font-size: 15px;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-nav-link:hover, .footer-nav-link:focus-visible {
  color: var(--color-mint);
  transform: translateX(3px);
}

/* Friendly Links Bar (Dofollow SEO PBN) */
.friendly-links-section {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  margin-bottom: 24px;
  text-align: center;
}

.friendly-links-title {
  font-size: 14px;
  color: #A39EA8;
  margin-bottom: 12px;
  font-weight: 600;
}

.friendly-links-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  list-style: none;
}

.friendly-link {
  color: var(--color-mint);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s ease, text-decoration 0.2s ease;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.friendly-link:hover, .friendly-link:focus-visible {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
  font-size: 13px;
  color: #9E99A3;
}

.footer-bottom a {
  color: #C5C1CC;
}
.footer-bottom a:hover {
  color: var(--color-mint);
}

/* ==========================================================================
   ARTICLE & SUBPAGE CONTENT STYLES
   ========================================================================== */
.page-header {
  padding: 60px 0 40px;
  background-color: var(--color-ivory-warm);
  border-bottom: 1px solid var(--border-subtle);
}

.breadcrumb-nav {
  margin-bottom: 20px;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  font-size: 14px;
  color: var(--color-charcoal-muted);
}

.breadcrumb-item a {
  color: var(--color-plum);
}

.breadcrumb-separator {
  color: var(--color-charcoal-light);
}

.page-title {
  font-size: 36px;
  margin-bottom: 16px;
  line-height: 1.25;
}

.page-lead {
  font-size: 18px;
  color: var(--color-charcoal-muted);
  max-width: 820px;
  line-height: 1.6;
}

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

.article-body {
  max-width: 840px;
  margin: 0 auto;
}

.article-body h2 {
  font-size: 26px;
  margin-top: 48px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--color-plum);
}

.article-body h3 {
  font-size: 20px;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--color-plum);
}

.article-body p {
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 20px;
  color: var(--color-charcoal);
}

.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 28px;
}

.article-body li {
  font-size: 17px;
  line-height: 1.75;
  margin-bottom: 8px;
}

.article-body blockquote {
  margin: 28px 0;
  padding: 18px 24px;
  background-color: var(--color-ivory-warm);
  border-left: 4px solid var(--color-plum);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 16px;
  color: var(--color-charcoal);
}

.article-callout {
  background-color: var(--color-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 32px 0;
  box-shadow: 0 4px 12px rgba(76, 64, 88, 0.04);
}

.article-callout-cta {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: linear-gradient(135deg, var(--color-ivory-warm) 0%, #F0EDE4 100%);
  border: 1px solid var(--color-plum-medium);
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 40px 0;
  text-align: center;
  align-items: center;
}

.article-callout-cta h4 {
  font-size: 20px;
  color: var(--color-plum);
}

.article-callout-cta p {
  font-size: 15px;
  color: var(--color-charcoal-muted);
  max-width: 600px;
  margin-bottom: 4px;
}

.related-articles {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 2px solid var(--border-subtle);
}

.related-title {
  font-size: 22px;
  margin-bottom: 24px;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.related-item {
  background-color: var(--color-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.related-item:hover {
  transform: translateY(-2px);
  border-color: var(--color-plum);
}

.related-item h4 {
  font-size: 17px;
  margin-bottom: 6px;
}

.related-item p {
  font-size: 14px;
  color: var(--color-charcoal-muted);
  margin-bottom: 0;
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS (Mobile first, 375, 390, 430, 768, 1024, 1440px)
   ========================================================================== */

/* Tablet & Up (>= 768px) */
@media (min-width: 768px) {
  :root {
    --text-h1: 42px;
    --text-h2: 30px;
    --container-pad: 32px;
  }

  .nav-links {
    display: flex;
  }

  .header-cta-group {
    display: flex;
  }

  .mobile-toggle {
    display: none;
  }

  .benefits-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .node-row {
    grid-template-columns: 240px 1fr auto;
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Desktop & Up (>= 1024px) */
@media (min-width: 1024px) {
  :root {
    --text-h1: 50px;
    --text-h2: 34px;
  }

  .hero-title {
    font-size: 50px;
  }

  .hero-section {
    padding: 80px 0 100px;
  }

  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 60px;
  }

  .pricing-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .articles-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Ultra-wide / 1440px */
@media (min-width: 1440px) {
  :root {
    --container-max: 1320px;
  }
}

/* ==========================================================================
   MOTION ACCESSIBILITY (prefers-reduced-motion)
   ========================================================================== */
@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;
  }

  .panel-1, .panel-2, .panel-3 {
    animation: none !important;
    transform: none !important;
  }

  .hinged-panel:hover, .hinged-panel:focus-within {
    transform: none !important;
  }

  .benefit-diagram {
    transform: none !important;
  }

  .benefit-card:hover .benefit-diagram {
    transform: none !important;
  }

  .article-card::after {
    transform: none !important;
  }
}