/* ==========================================================================
   闪电猫 Lightning Cat - Retro Thunder Arcade Stylesheet
   Pure Native CSS - High Contrast, Accessible, Mobile First
   ========================================================================== */

:root {
  --bg-cream: #FFF7E6;
  --bg-surface: #FFFFFF;
  --bg-surface-alt: #FFFDF9;
  --border-chocolate: #40342C;
  --lightning-yellow: #FFD447;
  --vibrant-orange: #FF8851;
  --brand-blue: #4E86D9;
  --brand-blue-light: #EBF3FF;
  --light-grey: #D7D3CC;
  --text-primary: #332720;
  --text-secondary: #63564D;
  --text-muted: #84766C;
  --shadow-color: #40342C;
  
  --border-width: 3px;
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  
  --shadow-sm: 3px 3px 0 var(--shadow-color);
  --shadow-md: 5px 5px 0 var(--shadow-color);
  --shadow-lg: 8px 8px 0 var(--shadow-color);
  --shadow-pressed: 2px 2px 0 var(--shadow-color);

  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --container-max: 1200px;
  --header-height: 76px;
}

/* 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%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-cream);
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 1rem;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(circle at 1px 1px, rgba(64, 52, 44, 0.08) 1.5px, transparent 0);
  background-size: 24px 24px;
}

/* Accessibility Focus */
:focus-visible {
  outline: 3px dashed var(--brand-blue);
  outline-offset: 4px;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -999px;
  left: 20px;
  background: var(--lightning-yellow);
  color: var(--border-chocolate);
  padding: 10px 16px;
  border: var(--border-width) solid var(--border-chocolate);
  font-weight: bold;
  z-index: 9999;
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}
.skip-link:focus {
  top: 15px;
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  color: var(--border-chocolate);
  font-weight: 800;
  line-height: 1.3;
}

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

a {
  color: var(--brand-blue);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover {
  text-decoration: underline;
}

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Retro Arcade Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  background: var(--bg-surface);
  color: var(--border-chocolate);
  transition: transform 0.1s ease, box-shadow 0.1s ease, background-color 0.15s ease;
  white-space: nowrap;
}
.btn:hover {
  text-decoration: none;
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-md);
}
.btn:active {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-pressed);
}

.btn-primary {
  background-color: var(--lightning-yellow);
  color: var(--border-chocolate);
}
.btn-primary:hover {
  background-color: #ffe066;
}

.btn-orange {
  background-color: var(--vibrant-orange);
  color: #FFFFFF;
}
.btn-orange:hover {
  background-color: #ff9868;
}

.btn-blue {
  background-color: var(--brand-blue);
  color: #FFFFFF;
}
.btn-blue:hover {
  background-color: #6398e8;
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--border-chocolate);
}
.btn-secondary:hover {
  background-color: var(--bg-cream);
}

.btn-lg {
  padding: 0.9rem 2rem;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.875rem;
}

/* Retro Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border: 2px solid var(--border-chocolate);
  border-radius: var(--border-radius-sm);
  background: var(--lightning-yellow);
  color: var(--border-chocolate);
  text-transform: uppercase;
}
.badge-orange {
  background: var(--vibrant-orange);
  color: #FFFFFF;
}
.badge-blue {
  background: var(--brand-blue);
  color: #FFFFFF;
}
.badge-grey {
  background: var(--light-grey);
  color: var(--border-chocolate);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-cream);
  border-bottom: var(--border-width) solid var(--border-chocolate);
  height: var(--header-height);
  display: flex;
  align-items: center;
  box-shadow: 0 4px 0 rgba(64, 52, 44, 0.05);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--border-chocolate);
}
.site-brand:hover {
  text-decoration: none;
}
.brand-logo-wrap {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}
.brand-name {
  font-size: 1.35rem;
  font-weight: 900;
  line-height: 1.1;
  display: flex;
  flex-direction: column;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--vibrant-orange);
  letter-spacing: 0.5px;
}

/* Desktop Nav */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}
.mobile-only-cta {
  display: none;
}
.nav-link {
  color: var(--border-chocolate);
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  padding: 0.4rem 0.2rem;
  position: relative;
  transition: color 0.15s ease;
}
.nav-link:hover {
  color: var(--vibrant-orange);
  text-decoration: none;
}
.nav-link:focus-visible {
  outline: 2px dashed var(--brand-blue);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Mobile Hamburger */
.menu-toggle {
  display: none;
  background: var(--lightning-yellow);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-sm);
  width: 44px;
  height: 44px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 3px;
  background: var(--border-chocolate);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 3.5rem 0 3rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hero-badge-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.18;
  color: var(--border-chocolate);
  letter-spacing: -0.5px;
}
.hero-title .hero-sub {
  display: block;
  color: var(--vibrant-orange);
  font-size: clamp(1.6rem, 3.8vw, 2.4rem);
  margin-top: 0.35rem;
}

.hero-intro-box {
  background: var(--bg-surface);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  padding: 1.25rem 1.5rem;
}
.hero-intro-box p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 0.5rem;
}

.hero-trust-note {
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Retro Arcade Mascot Window */
.hero-window-wrapper {
  position: relative;
}

.arcade-window {
  background: var(--bg-surface);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.window-titlebar {
  background: var(--lightning-yellow);
  border-bottom: var(--border-width) solid var(--border-chocolate);
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.window-dots {
  display: flex;
  gap: 6px;
}
.window-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--border-chocolate);
}
.dot-red { background: var(--vibrant-orange); }
.dot-yellow { background: var(--lightning-yellow); }
.dot-green { background: #52B788; }

.window-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--border-chocolate);
}

.window-screen {
  background: #FFFDF9;
  padding: 1.5rem;
  position: relative;
  min-height: 340px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* Pixel Cat Illustration SVG container */
.mascot-container {
  width: 240px;
  height: 220px;
  position: relative;
  z-index: 2;
}

/* Animated tail wag */
@keyframes tailWag {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(10deg); }
}
.mascot-tail {
  transform-origin: 165px 220px;
  animation: tailWag 3s ease-in-out infinite;
}

/* Pulsing network nodes */
@keyframes nodePulse {
  0%, 100% { opacity: 0.4; transform: scale(0.95); }
  50% { opacity: 1; transform: scale(1.08); }
}
.pulse-node {
  animation: nodePulse 2.4s ease-in-out infinite;
  transform-origin: center;
}
.pulse-node-2 {
  animation: nodePulse 2.8s ease-in-out infinite 0.8s;
  transform-origin: center;
}
.pulse-node-3 {
  animation: nodePulse 3.2s ease-in-out infinite 1.4s;
  transform-origin: center;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto !important;
  }
  .mascot-tail, .pulse-node, .pulse-node-2, .pulse-node-3,
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.network-badge-overlay {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 1rem;
  z-index: 3;
}

/* ==========================================================================
   Section Base Styles
   ========================================================================== */
.section-pad {
  padding: 4.5rem 0;
}
.section-alt {
  background: #FFF9ED;
  border-top: var(--border-width) solid var(--border-chocolate);
  border-bottom: var(--border-width) solid var(--border-chocolate);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3rem;
}
.section-tag {
  margin-bottom: 0.75rem;
}
.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 900;
  color: var(--border-chocolate);
  margin-bottom: 0.75rem;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Core Advantages (核心优势)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--bg-surface);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.feature-icon-box {
  width: 60px;
  height: 60px;
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-sm);
  background: var(--lightning-yellow);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}
.feature-icon-box.icon-orange { background: var(--vibrant-orange); }
.feature-icon-box.icon-blue { background: var(--brand-blue); }

.feature-title {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}
.feature-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}
.feature-points {
  margin-top: 1rem;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.feature-points li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.feature-points li::before {
  content: "⚡";
  font-size: 0.75rem;
  color: var(--vibrant-orange);
}

/* ==========================================================================
   Global Network (全球网络)
   ========================================================================== */
.network-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: start;
}

.network-map-card {
  background: var(--bg-surface);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
}
.map-canvas-wrap {
  width: 100%;
  border: 2px dashed var(--border-chocolate);
  border-radius: var(--border-radius-sm);
  background: #FFFDF9;
  padding: 1rem;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.network-disclaimer-note {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-cream);
  border: 2px solid var(--border-chocolate);
  border-radius: var(--border-radius-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.region-index-card {
  background: var(--bg-surface);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
}
.region-index-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.region-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.region-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  border: 2px solid var(--border-chocolate);
  border-radius: var(--border-radius-sm);
  background: var(--bg-surface-alt);
  font-size: 0.9375rem;
  font-weight: 700;
}
.region-name {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.status-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--border-chocolate);
  border-radius: 3px;
  background: var(--lightning-yellow);
}

/* ==========================================================================
   AI & Streaming (AI 与流媒体)
   ========================================================================== */
.usecases-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.usecase-box {
  background: var(--bg-surface);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  padding: 2rem;
}
.usecase-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 2px dashed var(--border-chocolate);
}
.usecase-badge {
  font-size: 1.5rem;
}
.usecase-title {
  font-size: 1.45rem;
}

.tool-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}
.tool-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.7rem;
  background: var(--bg-cream);
  border: 2px solid var(--border-chocolate);
  border-radius: var(--border-radius-sm);
  font-weight: 700;
  font-size: 0.875rem;
}

.usecase-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.usecase-caution {
  margin-top: 1.25rem;
  padding: 0.85rem 1rem;
  background: #FFF2EA;
  border-left: 4px solid var(--vibrant-orange);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  font-size: 0.85rem;
  color: var(--border-chocolate);
  line-height: 1.6;
}

/* ==========================================================================
   Pricing Section (套餐价格 - 复古票券式)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.ticket-card {
  background: var(--bg-surface);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.ticket-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.ticket-featured {
  border-color: var(--border-chocolate);
  box-shadow: var(--shadow-lg);
  transform: scale(1.02);
  z-index: 2;
}
.ticket-featured:hover {
  transform: scale(1.02) translateY(-4px);
}

.ticket-ribbon {
  background: var(--vibrant-orange);
  color: #FFFFFF;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 800;
  padding: 0.35rem 0;
  border-bottom: var(--border-width) solid var(--border-chocolate);
  letter-spacing: 1px;
}

.ticket-header {
  padding: 1.75rem 1.5rem 1.25rem;
  border-bottom: 2px dashed var(--border-chocolate);
  position: relative;
}
/* Retro Ticket Cutouts */
.ticket-header::before, .ticket-header::after {
  content: "";
  position: absolute;
  bottom: -10px;
  width: 20px;
  height: 20px;
  background-color: var(--bg-cream);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: 50%;
  z-index: 5;
}
.ticket-header::before {
  left: -13px;
}
.ticket-header::after {
  right: -13px;
}

.ticket-name {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}
.ticket-price-box {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  margin-top: 0.5rem;
}
.ticket-currency {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--border-chocolate);
}
.ticket-amount {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--border-chocolate);
  font-family: var(--font-mono);
}
.ticket-period {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.ticket-cycle-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.65rem;
}
.ticket-cycle-pill {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--border-chocolate);
  border-radius: var(--border-radius-sm);
  background: var(--bg-cream);
  color: var(--border-chocolate);
}
.ticket-cycle-pill.pill-accent {
  background: #FFF2EA;
  color: var(--vibrant-orange);
  border-color: var(--vibrant-orange);
}

.ticket-body {
  padding: 1.75rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
}

.ticket-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.ticket-features li {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}
.ticket-features li strong {
  color: var(--text-primary);
}

.ticket-data-notice {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 0.5rem;
}

/* ==========================================================================
   9 Articles SEO Grid (文章卡片)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.article-card {
  background: var(--bg-surface);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.article-thumb-link {
  display: block;
  border-bottom: var(--border-width) solid var(--border-chocolate);
  background: var(--bg-cream);
  overflow: hidden;
}
.article-thumb-svg {
  width: 100%;
  height: 160px;
  transition: transform 0.3s ease;
}
.article-card:hover .article-thumb-svg {
  transform: scale(1.03);
}

.article-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.article-card-title {
  font-size: 1.25rem;
  line-height: 1.35;
  margin-bottom: 0.75rem;
}
.article-card-title a {
  color: var(--border-chocolate);
  text-decoration: none;
}
.article-card-title a:hover {
  color: var(--brand-blue);
  text-decoration: underline;
}

.article-card-excerpt {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px dashed var(--light-grey);
}
.article-readmore {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--vibrant-orange);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}
.article-readmore:hover {
  color: var(--border-chocolate);
}

/* ==========================================================================
   Reviews (用户评价 - 明确标注示例)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.review-card {
  background: var(--bg-surface);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.review-placeholder-tag {
  align-self: flex-start;
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  background: #FFF2EA;
  color: var(--vibrant-orange);
  border: 1px solid var(--vibrant-orange);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-mono);
  margin-bottom: 1rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  font-style: italic;
  margin-bottom: 1.25rem;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--light-grey);
}
.review-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2px solid var(--border-chocolate);
  background: var(--lightning-yellow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}
.review-info-name {
  font-weight: 700;
  font-size: 0.9375rem;
}
.review-info-role {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ==========================================================================
   FAQ Section (details / summary)
   ========================================================================== */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.faq-item {
  background: var(--bg-surface);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow 0.15s ease;
}
.faq-item:hover {
  box-shadow: var(--shadow-md);
}

.faq-summary {
  padding: 1.25rem 1.5rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--border-chocolate);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  user-select: none;
}
.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-icon-toggle {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border: 2px solid var(--border-chocolate);
  border-radius: var(--border-radius-sm);
  background: var(--lightning-yellow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  line-height: 1;
  transition: transform 0.2s ease, background 0.2s ease;
}
.faq-item[open] .faq-icon-toggle {
  transform: rotate(45deg);
  background: var(--vibrant-orange);
  color: #FFFFFF;
}

.faq-content {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px dashed var(--light-grey);
  margin-top: -0.25rem;
  padding-top: 1rem;
}
.faq-content p {
  margin-bottom: 0.75rem;
}
.faq-content p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #FFF3DB;
  border-top: var(--border-width) solid var(--border-chocolate);
  padding: 4rem 0 2rem;
  margin-top: auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.footer-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
  max-width: 380px;
}

.footer-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.footer-links a {
  color: var(--border-chocolate);
  font-size: 0.9375rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.footer-links a:hover {
  color: var(--brand-blue);
  transform: translateX(2px);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: var(--border-width) solid var(--border-chocolate);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Article Page Specific Styles (文章内页规范)
   ========================================================================== */
.article-header-section {
  padding: 3rem 0 2rem;
  background: var(--bg-surface-alt);
  border-bottom: var(--border-width) solid var(--border-chocolate);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.breadcrumbs a {
  color: var(--text-secondary);
}
.breadcrumbs a:hover {
  color: var(--brand-blue);
}
.breadcrumbs span {
  color: var(--light-grey);
}

.article-hero-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.article-info-bar {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  flex-wrap: wrap;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2.5rem;
  padding: 3rem 0;
}

.article-main-body {
  background: var(--bg-surface);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  padding: 2.5rem 2rem;
  color: var(--text-primary);
  font-size: 1.05rem;
  line-height: 1.8;
  word-break: break-word;
}
.article-main-body h2 {
  font-size: 1.65rem;
  margin: 2.25rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-chocolate);
}
.article-main-body h3 {
  font-size: 1.3rem;
  margin: 1.75rem 0 0.75rem;
  color: var(--vibrant-orange);
}
.article-main-body p {
  margin-bottom: 1.25rem;
}
.article-main-body ul, .article-main-body ol {
  margin: 1rem 0 1.5rem 1.5rem;
}
.article-main-body li {
  margin-bottom: 0.5rem;
}
.article-main-body blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background: var(--bg-cream);
  border-left: 4px solid var(--brand-blue);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  font-size: 0.95rem;
}
.article-main-body code {
  font-family: var(--font-mono);
  background: #F3EFE6;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-size: 0.9em;
  border: 1px solid var(--light-grey);
}
.article-main-body pre {
  background: var(--border-chocolate);
  color: #FFF;
  padding: 1.25rem;
  border-radius: var(--border-radius-sm);
  overflow-x: auto;
  margin: 1.5rem 0;
}
.article-main-body pre code {
  background: transparent;
  color: inherit;
  border: none;
  padding: 0;
}

.article-cta-box {
  margin: 2.5rem 0;
  padding: 1.75rem;
  background: var(--bg-cream);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar-widget {
  background: var(--bg-surface);
  border: var(--border-width) solid var(--border-chocolate);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
}
.sidebar-title {
  font-size: 1.15rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px dashed var(--border-chocolate);
}

/* ==========================================================================
   Responsive Breakpoints: 1024px, 768px, 430px, 390px, 375px
   ========================================================================== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .network-layout {
    grid-template-columns: 1fr;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 68px;
    --border-width: 2.5px;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-cream);
    border-bottom: var(--border-width) solid var(--border-chocolate);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    box-shadow: var(--shadow-lg);
    z-index: 999;
  }
  .nav-menu.is-active {
    display: flex;
  }
  .header-actions .btn {
    display: none; /* In header, show inside menu for mobile */
  }
  .nav-menu .mobile-only-cta {
    display: block;
    margin-top: 0.5rem;
    width: 100%;
    text-align: center;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .hero-section {
    padding: 2rem 0;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  .usecases-grid {
    grid-template-columns: 1fr;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 430px) {
  .hero-title {
    font-size: 1.85rem;
  }
  .hero-title .hero-sub {
    font-size: 1.35rem;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  .article-main-body {
    padding: 1.5rem 1rem;
    overflow-wrap: break-word;
    word-break: break-word;
  }
  .mascot-container {
    width: 100%;
    max-width: 240px;
    height: auto;
    aspect-ratio: 240/220;
  }
  .window-screen {
    padding: 1rem 0.5rem;
  }
  .ticket-currency {
    font-size: 1rem;
  }
  .ticket-amount {
    font-size: 1.8rem;
  }
  .btn-lg {
    padding: 0.8rem 1.25rem;
    font-size: 1rem;
  }
}

@media (max-width: 375px) {
  .container {
    padding: 0 0.85rem;
  }
  .hero-title {
    font-size: 1.65rem;
  }
  .hero-title .hero-sub {
    font-size: 1.2rem;
  }
  .brand-name {
    font-size: 1.15rem;
  }
}