/* ==========================================================================
   龙猫云 Chinchilla Cloud · 主样式表 (style.css)
   设计语言：复古像素/奶油色调 · 3px粗描边 · 硬阴影 · 纯净系统字体
   ========================================================================== */

:root {
  /* 调色盘规范 */
  --bg-cream: #FFF8E8;
  --bg-card: #FFFDF8;
  --bg-soft-purple: #F3EFFB;
  --bg-soft-yellow: #FFF2D1;
  --bg-soft-coral: #FFEAEA;
  --bg-dark-window: #3C302A;

  --color-stroke: #493C35;
  --color-text-main: #493C35;
  --color-text-muted: #7A6D65;
  --color-text-light: #9C8E86;

  --brand-purple: #9B87D5;
  --brand-purple-dark: #816EBD;
  --brand-purple-light: #C9BDEC;
  --accent-coral: #FF7979;
  --accent-coral-hover: #FA6060;
  --btn-yellow: #FFD46B;
  --btn-yellow-hover: #FFC947;
  --fur-gray: #B8B0AA;
  --accent-green: #74C69D;

  /* 边框与阴影规范 */
  --border-width: 3px;
  --border-main: 3px solid var(--color-stroke);
  --border-thin: 2px solid var(--color-stroke);
  --border-dashed: 3px dashed var(--color-stroke);

  --shadow-sm: 2px 2px 0 var(--color-stroke);
  --shadow-main: 4px 4px 0 var(--color-stroke);
  --shadow-lg: 6px 6px 0 var(--color-stroke);
  --shadow-xl: 8px 8px 0 var(--color-stroke);

  /* 圆角规范 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 9999px;

  /* 字体规范：系统字体优先，保持现代可读，避免全站像素字体 */
  --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, Consolas, "Liberation Mono", monospace;

  /* 间距与最大宽度 */
  --container-max: 1200px;
  --container-narrow: 840px;
  --nav-height: 72px;
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-cream);
  color: var(--color-text-main);
  line-height: 1.65;
  overflow-x: hidden;
  max-width: 100%;
  overflow-wrap: anywhere;
  /* 细微的复古网格背景增强质感 */
  background-image: 
    radial-gradient(var(--fur-gray) 0.8px, transparent 0.8px);
  background-size: 24px 24px;
}

/* 键盘焦点可访问性 */
:focus-visible {
  outline: 3px solid var(--accent-coral);
  outline-offset: 3px;
}

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

a {
  color: var(--color-text-main);
  text-decoration: none;
  transition: all 0.15s ease;
}

ul, ol {
  list-style: none;
}

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

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

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ==========================================================================
   复古像素与装饰组件
   ========================================================================== */
.pixel-box {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-main);
  border-radius: var(--radius-md);
  position: relative;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.pixel-box:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}

.pixel-window {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.pixel-window-header {
  background: var(--brand-purple);
  border-bottom: var(--border-main);
  padding: 8px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.pixel-window-header.coral {
  background: var(--accent-coral);
}

.pixel-window-header.yellow {
  background: var(--btn-yellow);
}

.pixel-window-title {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-main);
}

.pixel-window-dots {
  display: flex;
  gap: 6px;
}

.pixel-window-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 2px solid var(--color-stroke);
  display: inline-block;
}

.dot-red { background: var(--accent-coral); }
.dot-yellow { background: var(--btn-yellow); }
.dot-green { background: var(--accent-green); }

/* 像素徽章 */
.retro-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 0.82rem;
  font-weight: 800;
  border: var(--border-thin);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  background: var(--bg-card);
  white-space: nowrap;
}

.retro-badge.yellow {
  background: var(--btn-yellow);
}

.retro-badge.purple {
  background: var(--brand-purple);
  color: #FFF;
}

.retro-badge.coral {
  background: var(--accent-coral);
  color: #FFF;
}

.retro-badge.green {
  background: var(--accent-green);
  color: #FFF;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 800;
  border: var(--border-main);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-main);
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  background: var(--bg-card);
  color: var(--color-text-main);
  transition: transform 0.1s ease, box-shadow 0.1s ease, background-color 0.15s ease;
  user-select: none;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-sm);
}

.btn-primary {
  background: var(--btn-yellow);
  color: var(--color-text-main);
}

.btn-primary:hover {
  background: var(--btn-yellow-hover);
}

.btn-purple {
  background: var(--brand-purple);
  color: #FFF;
}

.btn-purple:hover {
  background: var(--brand-purple-dark);
}

.btn-coral {
  background: var(--accent-coral);
  color: #FFF;
}

.btn-coral:hover {
  background: var(--accent-coral-hover);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.88rem;
  box-shadow: var(--shadow-sm);
}

.btn-sm:hover {
  box-shadow: var(--shadow-main);
}

.btn-block {
  width: 100%;
}

/* 标题样式 */
.section-header {
  text-align: center;
  margin-bottom: 48px;
  position: relative;
}

.section-tag {
  display: inline-block;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--color-text-main);
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   Header 导航栏
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-cream);
  border-bottom: var(--border-main);
  box-shadow: 0 4px 0 rgba(73, 60, 53, 0.08);
}

.header-inner {
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* 品牌 Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 900;
  font-size: 1.25rem;
  color: var(--color-text-main);
}

.logo-icon {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-title {
  font-size: 1.15rem;
  font-weight: 900;
}

.logo-subtitle {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--brand-purple);
  letter-spacing: 0.5px;
}

/* 桌面导航 */
.site-nav {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-text-main);
  padding: 6px 4px;
  position: relative;
  border-radius: var(--radius-sm);
}

.nav-link:hover {
  color: var(--brand-purple-dark);
}

.nav-link.active {
  color: var(--brand-purple-dark);
  text-decoration: underline;
  text-decoration-thickness: 3px;
  text-underline-offset: 6px;
}

.nav-cta-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 移动端汉堡按钮 */
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 8px;
  background: var(--bg-card);
  border: var(--border-main);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.menu-toggle:hover {
  background: var(--btn-yellow);
}

.hamburger-line {
  width: 22px;
  height: 3px;
  background: var(--color-stroke);
  border-radius: 2px;
  transition: all 0.25s ease;
}

.hamburger-line + .hamburger-line {
  margin-top: 5px;
}

/* 展开状态的汉堡图标 */
.menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* 移动端菜单抽屉 */
.mobile-nav-drawer {
  display: none;
  background: var(--bg-cream);
  border-bottom: var(--border-main);
  box-shadow: var(--shadow-main);
  padding: 20px;
}

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

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  font-size: 1.05rem;
  font-weight: 800;
  background: var(--bg-card);
  border: var(--border-thin);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.mobile-nav-link:hover, .mobile-nav-link:active {
  background: var(--btn-yellow);
}

.mobile-nav-cta {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media (min-width: 1024px) {
  .site-nav {
    display: block;
  }
  .menu-toggle {
    display: none;
  }
  .mobile-nav-drawer {
    display: none !important;
  }
}

/* ==========================================================================
   Hero 首屏
   ========================================================================== */
.hero-section {
  padding: 48px 0 64px 0;
  position: relative;
  overflow: hidden;
}

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

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
  }
}

/* 左侧文字区 */
.hero-tagline {
  margin-bottom: 16px;
}

.hero-h1 {
  font-size: 2.3rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--color-text-main);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

@media (min-width: 768px) {
  .hero-h1 {
    font-size: 2.9rem;
  }
}

.hero-fixed-intro {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}

/* 服务概括介绍框 */
.hero-service-card {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-main);
  border-radius: var(--radius-md);
  padding: 18px 20px;
}

.service-card-title {
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--brand-purple-dark);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-card-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.service-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.mini-tag {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 2px 8px;
  background: var(--bg-soft-purple);
  border: var(--border-thin);
  border-radius: 4px;
}

/* 右侧领航员展示窗 */
.hero-showcase-window {
  width: 100%;
}

.hero-visual-box {
  padding: 20px;
  background: #FFFBF0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.hero-chinchilla-wrap {
  width: 220px;
  max-width: 75%;
  position: relative;
  animation: floatBob 4s ease-in-out infinite;
}

@keyframes floatBob {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

/* 节点示意面板 */
.hero-node-schematic {
  width: 100%;
  background: var(--bg-card);
  border: var(--border-thin);
  border-radius: var(--radius-sm);
  padding: 14px;
}

.schematic-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.schematic-title {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  gap: 6px;
}

.schematic-disclaimer-tag {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--accent-coral);
  background: var(--bg-soft-coral);
  padding: 2px 6px;
  border: 1px solid var(--accent-coral);
  border-radius: 4px;
}

.schematic-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

@media (min-width: 480px) {
  .schematic-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.schematic-node-item {
  background: var(--bg-cream);
  border: var(--border-thin);
  border-radius: 6px;
  padding: 8px;
  text-align: center;
}

.node-flag {
  font-size: 1.2rem;
  display: block;
  margin-bottom: 2px;
}

.node-name {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--color-text-main);
  display: block;
}

.node-status-hint {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.schematic-footer-notice {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--fur-gray);
}

/* ==========================================================================
   核心优势 (3项以上，避免全站卡片雷同)
   ========================================================================== */
.features-section {
  padding: 64px 0;
  background: #FFF5DD;
  border-top: var(--border-main);
  border-bottom: var(--border-main);
}

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

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

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

.feature-card {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-main);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-card-accent-1 { border-top: 6px solid var(--brand-purple); }
.feature-card-accent-2 { border-top: 6px solid var(--accent-coral); }
.feature-card-accent-3 { border-top: 6px solid var(--btn-yellow); }
.feature-card-accent-4 { border-top: 6px solid var(--accent-green); }

.feature-icon-wrap {
  width: 56px;
  height: 56px;
  border: var(--border-thin);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  background: var(--bg-cream);
}

.feature-icon {
  width: 32px;
  height: 32px;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 900;
  margin-bottom: 12px;
  color: var(--color-text-main);
}

.feature-text {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   全球节点 / 网络能力
   ========================================================================== */
.network-section {
  padding: 72px 0;
}

.network-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 960px) {
  .network-container {
    grid-template-columns: 1fr 1fr;
  }
}

.network-left-card {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-main);
  border-radius: var(--radius-md);
  padding: 28px;
}

.network-desc-title {
  font-size: 1.35rem;
  font-weight: 900;
  margin-bottom: 16px;
}

.network-desc-text {
  font-size: 0.96rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  line-height: 1.7;
}

.disclaimer-box {
  background: var(--bg-soft-coral);
  border: var(--border-thin);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--color-text-main);
  line-height: 1.6;
}

.disclaimer-box strong {
  color: var(--accent-coral-hover);
}

/* 地区列表网格 */
.region-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 480px) {
  .region-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.region-item-card {
  background: var(--bg-card);
  border: var(--border-main);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  padding: 16px;
}

.region-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.region-title {
  font-size: 1.05rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 6px;
}

.region-purpose {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   AI 与流媒体专区
   ========================================================================== */
.entertainment-ai-section {
  padding: 72px 0;
  background: var(--bg-soft-purple);
  border-top: var(--border-main);
  border-bottom: var(--border-main);
}

.dual-zone-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

@media (min-width: 860px) {
  .dual-zone-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.zone-window {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-main);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.zone-content {
  padding: 24px;
}

.zone-intro {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

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

.tool-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--bg-cream);
  border: var(--border-thin);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.tool-badge {
  font-weight: 900;
  font-size: 0.8rem;
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--color-stroke);
  white-space: nowrap;
}

.tool-info {
  flex: 1;
}

.tool-name {
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-bottom: 2px;
}

.tool-desc {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.45;
}

/* 兼容性与选节点指引横幅 */
.zone-guide-banner {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-main);
  border-radius: var(--radius-md);
  padding: 24px 28px;
}

.banner-title {
  font-size: 1.15rem;
  font-weight: 900;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.banner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

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

.banner-col-title {
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--brand-purple-dark);
  margin-bottom: 6px;
}

.banner-col-text {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* ==========================================================================
   套餐价格 (Pricing)
   ========================================================================== */
.pricing-section {
  padding: 72px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: stretch;
}

@media (min-width: 860px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-card {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-main);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

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

/* 视觉强调推荐位 */
.pricing-card.featured {
  background: #FFFDF4;
  border: 4px solid var(--color-stroke);
  box-shadow: var(--shadow-lg);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.featured-ribbon {
  position: absolute;
  top: -14px;
  right: 20px;
  background: var(--accent-coral);
  color: #FFF;
  font-weight: 900;
  font-size: 0.78rem;
  padding: 4px 14px;
  border: var(--border-thin);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
}

.pricing-plan-name {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--color-text-main);
  margin-bottom: 8px;
}

.pricing-plan-tagline {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

/* 计费周期切换开关 */
.pricing-toggle-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 36px;
}

.pricing-toggle-box {
  display: inline-flex;
  padding: 4px;
  background: var(--bg-card);
  border: var(--border-main);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
}

.pricing-toggle-btn {
  padding: 8px 20px;
  font-size: 0.92rem;
  font-weight: 800;
  border: 2px solid transparent;
  background: transparent;
  color: var(--color-text-muted);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.15s ease;
}

.pricing-toggle-btn:hover {
  color: var(--color-text-main);
}

.pricing-toggle-btn.active {
  background: var(--btn-yellow);
  color: var(--color-text-main);
  border-color: var(--color-stroke);
  box-shadow: var(--shadow-sm);
}

.pricing-price-box {
  background: var(--bg-cream);
  border: var(--border-thin);
  border-radius: var(--radius-md);
  padding: 18px 14px;
  margin-bottom: 24px;
  text-align: center;
}

.price-main-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  margin-bottom: 6px;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent-coral);
  margin-right: 2px;
}

.price-value {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  color: var(--color-text-main);
  letter-spacing: -1px;
}

.price-period {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--color-text-muted);
  margin-left: 4px;
}

.price-traffic-badge {
  display: inline-block;
  padding: 3px 14px;
  font-size: 0.85rem;
  font-weight: 800;
  border-radius: var(--radius-pill);
  background: var(--bg-soft-purple);
  border: var(--border-thin);
  color: var(--brand-purple-dark);
  margin-bottom: 6px;
}

.price-status {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--accent-coral);
  display: block;
}

.price-subhint {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  display: block;
  margin-top: 4px;
}

.pricing-feature-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--color-text-main);
  line-height: 1.45;
}

.feature-check {
  font-size: 1rem;
  color: var(--accent-green);
  font-weight: 900;
}

/* ==========================================================================
   9 篇 SEO 文章卡片网格
   ========================================================================== */
.articles-section {
  padding: 72px 0;
  background: #FFF9ED;
  border-top: var(--border-main);
  border-bottom: var(--border-main);
}

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

@media (min-width: 680px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.article-card {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-main);
  border-radius: var(--radius-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-card-cover-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #F2EDE2;
  border-bottom: var(--border-main);
  overflow: hidden;
}

.article-card-cover-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-card-body {
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.article-category {
  font-size: 0.75rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--color-stroke);
  background: var(--btn-yellow);
}

.article-time {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 900;
  line-height: 1.35;
  margin-bottom: 10px;
}

.article-card-title a {
  color: var(--color-text-main);
}

.article-card-title a:hover {
  color: var(--brand-purple-dark);
}

.article-card-excerpt {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 20px;
  flex: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px dashed var(--fur-gray);
  padding-top: 14px;
}

.article-card-date {
  font-size: 0.78rem;
  color: var(--color-text-light);
}

.article-card-btn {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--brand-purple-dark);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-card-btn:hover {
  text-decoration: underline;
}

/* ==========================================================================
   用户评价 (规范要求注明：评价示例，待替换)
   ========================================================================== */
.testimonials-section {
  padding: 72px 0;
}

.testimonial-banner-notice {
  text-align: center;
  margin-bottom: 32px;
}

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

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

.testimonial-card {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-main);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.testimonial-quote {
  font-size: 0.94rem;
  color: var(--color-text-main);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
  font-style: italic;
}

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

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: var(--border-thin);
  background: var(--bg-soft-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.1rem;
}

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

.author-name {
  font-size: 0.92rem;
  font-weight: 800;
}

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

.author-badge-slot {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-coral);
}

/* ==========================================================================
   FAQ 折叠问答 (details / summary)
   ========================================================================== */
.faq-section {
  padding: 72px 0;
  background: #FFFBF0;
  border-top: var(--border-main);
  border-bottom: var(--border-main);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 880px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow 0.15s ease;
}

.faq-item:hover {
  box-shadow: var(--shadow-main);
}

.faq-question {
  padding: 18px 22px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

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

.faq-chevron {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-item[open] .faq-question {
  border-bottom: 2px dashed var(--fur-gray);
  background: var(--bg-soft-yellow);
}

.faq-answer {
  padding: 18px 22px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.faq-answer p + p {
  margin-top: 10px;
}

/* ==========================================================================
   Footer 页脚
   ========================================================================== */
.site-footer {
  background: #3A2F29;
  color: #FFFDF8;
  padding: 56px 0 32px 0;
  border-top: 4px solid var(--color-stroke);
}

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

@media (min-width: 768px) {
  .footer-top {
    grid-template-columns: 1.6fr 1fr 1fr;
  }
}

.footer-brand-col p {
  font-size: 0.9rem;
  color: #D2C7BF;
  line-height: 1.65;
  margin-top: 14px;
}

.footer-col-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--btn-yellow);
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

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

.footer-links-list a {
  color: #E2DAD3;
  font-size: 0.88rem;
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-links-list a:hover {
  color: var(--btn-yellow);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid #574A41;
  padding-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  text-align: center;
  font-size: 0.82rem;
  color: #B8ADA4;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-bottom a {
  color: #D6CBC1;
}

.footer-bottom a:hover {
  color: var(--btn-yellow);
}

/* ==========================================================================
   独立文章详情页 (Blog Post Layout)
   ========================================================================== */
.article-page-header {
  padding: 40px 0 24px 0;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--color-text-muted);
}

.breadcrumbs a {
  color: var(--color-text-main);
}

.breadcrumbs a:hover {
  color: var(--brand-purple-dark);
}

.breadcrumbs-sep {
  color: var(--fur-gray);
}

.article-hero {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-main);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  margin-bottom: 36px;
}

.article-h1 {
  font-size: 2.1rem;
  font-weight: 900;
  line-height: 1.3;
  color: var(--color-text-main);
  margin-bottom: 16px;
}

@media (min-width: 768px) {
  .article-h1 {
    font-size: 2.6rem;
  }
}

.article-hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.article-hero-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: var(--border-thin);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #F4EFE6;
}

.article-hero-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 文章正文排版 */
.article-body-content {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-main);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text-main);
  margin-bottom: 40px;
}

@media (min-width: 768px) {
  .article-body-content {
    padding: 48px 44px;
  }
}

.article-body-content h2 {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--color-text-main);
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--btn-yellow);
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-body-content h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-top: 28px;
  margin-bottom: 12px;
}

.article-body-content p {
  margin-bottom: 20px;
}

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

.article-body-content ul {
  list-style: square;
}

.article-body-content ol {
  list-style: decimal;
}

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

.article-body-content strong {
  font-weight: 800;
  color: #2F241F;
}

/* 提示框组件 */
.article-callout {
  background: var(--bg-soft-yellow);
  border-left: 5px solid var(--btn-yellow-hover);
  border: var(--border-thin);
  border-left-width: 6px;
  border-left-color: var(--brand-purple);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 0.95rem;
  line-height: 1.65;
}

.article-callout.warning {
  background: var(--bg-soft-coral);
  border-left-color: var(--accent-coral);
}

.article-callout.tip {
  background: #E8F5EE;
  border-left-color: var(--accent-green);
}

/* 对照表格 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 24px 0;
  border: var(--border-thin);
  border-radius: var(--radius-sm);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
  background: #FFF;
}

.article-table th {
  background: var(--brand-purple);
  color: #FFF;
  font-weight: 800;
  padding: 12px 14px;
  border: 1px solid var(--color-stroke);
  white-space: nowrap;
}

.article-table td {
  padding: 12px 14px;
  border: 1px solid #E5DFD4;
  line-height: 1.5;
}

.article-table tr:nth-child(even) {
  background: var(--bg-cream);
}

/* 代码块 */
.code-block {
  background: #3A2F29;
  color: #FFF8E8;
  border: var(--border-thin);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  overflow-x: auto;
  margin: 24px 0;
  line-height: 1.5;
}

/* 相关文章卡片 */
.related-articles-section {
  margin-top: 48px;
  padding-top: 32px;
  border-top: var(--border-main);
}

.related-title {
  font-size: 1.35rem;
  font-weight: 900;
  margin-bottom: 20px;
}

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

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

@media (min-width: 900px) {
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.related-card {
  background: var(--bg-card);
  border: var(--border-thin);
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.related-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-main);
}

.related-card-title {
  font-size: 0.98rem;
  font-weight: 800;
  margin-bottom: 8px;
  line-height: 1.4;
}

.related-card-excerpt {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   独立静态页面 (About, Terms, Privacy, Sitemap)
   ========================================================================== */
.static-page-header {
  padding: 48px 0 24px 0;
  text-align: center;
}

.static-page-title {
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 12px;
}

.static-page-desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.static-card-content {
  background: var(--bg-card);
  border: var(--border-main);
  box-shadow: var(--shadow-main);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  margin-bottom: 56px;
}

@media (min-width: 768px) {
  .static-card-content {
    padding: 48px;
  }
}

.static-card-content h2 {
  font-size: 1.4rem;
  font-weight: 900;
  margin-top: 32px;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--btn-yellow);
  padding-bottom: 6px;
}

.static-card-content p {
  margin-bottom: 16px;
  line-height: 1.7;
}

/* 网站地图列表卡片 */
.sitemap-group {
  margin-bottom: 32px;
}

.sitemap-group-title {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--brand-purple-dark);
  margin-bottom: 14px;
}

.sitemap-links-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

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

.sitemap-link-card {
  background: var(--bg-cream);
  border: var(--border-thin);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
}

.sitemap-link-card a {
  font-weight: 800;
  color: var(--color-text-main);
  margin-bottom: 4px;
}

.sitemap-link-card span {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   无障碍：减弱动态 (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;
  }
  .hero-chinchilla-wrap {
    animation: none !important;
  }
}

/* ==========================================================================
   打印样式优化
   ========================================================================== */
@media print {
  .site-header, .site-footer, .btn, .menu-toggle {
    display: none !important;
  }
  body {
    background: #FFF;
    color: #000;
  }
  .article-body-content, .pixel-box {
    box-shadow: none !important;
    border: 1px solid #ccc !important;
  }
}