/* ===================================================================
   熊猫机场 (ipandacloud.sbs) - 全新深度定制视觉系统 (Bento Grid + 高性能动态交互)
   设计原则：拒绝雷同模板 / 非对称现代排版 / 纯原生动效 / 系统字体栈
   =================================================================== */

:root {
  /* 精准工业调色板 - 避开通用 AI 模板色系 */
  --bg-app: #f6f8fc;
  --bg-surface: #ffffff;
  --bg-subtle: #edf2f9;
  --bg-elevated: #ffffff;
  --bg-dark-panel: #0b1120;
  
  --text-main: #090e1a;
  --text-muted: #334155;
  --text-light: #64748b;
  --text-inverse: #f8fafc;
  
  /* 品牌色阶：电光钴蓝 + 极光青 + 琥珀警示 */
  --brand-primary: #1d4ed8;
  --brand-primary-hover: #1e40af;
  --brand-primary-glow: rgba(29, 78, 216, 0.15);
  --brand-accent: #0284c7;
  --brand-cyan: #06b6d4;
  --brand-emerald: #10b981;
  --brand-amber: #f59e0b;
  
  /* 边框与微阴影 */
  --border-hairline: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-focus: #3b82f6;
  
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --shadow-subtle: 0 1px 3px rgba(15, 23, 42, 0.05), 0 1px 2px rgba(15, 23, 42, 0.03);
  --shadow-card: 0 4px 16px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 12px 30px -4px rgba(29, 78, 216, 0.12), 0 4px 12px -2px rgba(15, 23, 42, 0.06);
  --shadow-glow: 0 0 20px rgba(6, 182, 212, 0.25);
  
  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --container-max: 1180px;
  --header-height: 72px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-stack);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.68;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  /* 现代微网格底纹背景 - 增加结构感 */
  background-image: radial-gradient(rgba(148, 163, 184, 0.22) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* 顶部阅读进度指示条 (文章页与全站动态) */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-cyan));
  z-index: 1001;
  transition: width 0.1s ease-out;
}

:focus-visible {
  outline: 3px solid var(--brand-primary);
  outline-offset: 3px;
}

a {
  color: var(--brand-primary);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: var(--brand-primary-hover);
}

/* 布局体系 */
.layout-container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.layout-narrow {
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
}

/* 头部导航 - 动态高质感玻璃质感 */
.site-header {
  background-color: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-hairline);
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: background-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header--scrolled {
  background-color: rgba(255, 255, 255, 0.96);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.site-logo__badge {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #1d4ed8 0%, #0284c7 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(29, 78, 216, 0.25);
  font-size: 1.25rem;
}

.site-logo__text-box {
  display: flex;
  flex-direction: column;
}

.site-logo__name {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.site-logo__sub {
  font-size: 0.72rem;
  color: var(--text-light);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav__link {
  color: var(--text-muted);
  font-size: 0.94rem;
  font-weight: 600;
  padding: 8px 4px;
  position: relative;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--brand-primary);
  transition: width 0.2s ease;
}

.site-nav__link:hover {
  color: var(--brand-primary);
  text-decoration: none;
}

.site-nav__link:hover::after,
.site-nav__link--active::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  background: var(--bg-subtle);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-xs);
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-main);
  font-size: 1.2rem;
}

/* 实体立体微动感 CTA 按钮 (去除通用AI样式) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.98rem;
  font-weight: 700;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  border: 1px solid transparent;
  min-height: 48px;
  position: relative;
  overflow: hidden;
  user-select: none;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: linear-gradient(180deg, #2563eb 0%, #1d4ed8 100%);
  color: #ffffff;
  border-color: #1e40af;
  box-shadow: 0 2px 4px rgba(29, 78, 216, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.btn--primary:hover {
  background: linear-gradient(180deg, #3b82f6 0%, #2563eb 100%);
  box-shadow: 0 4px 14px rgba(29, 78, 216, 0.35);
  color: #ffffff;
  text-decoration: none;
}

.btn--secondary {
  background-color: #ffffff;
  color: var(--text-main);
  border-color: var(--border-medium);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05);
}

.btn--secondary:hover {
  background-color: var(--bg-subtle);
  border-color: #94a3b8;
  color: var(--text-main);
  text-decoration: none;
}

.btn--full {
  width: 100%;
}

/* Hero 模块 - 非对称双栏架构 (左文案 + 右端动态监控板) */
.hero-wrapper {
  padding: 64px 0 54px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-pill-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: #ffffff;
  border: 1px solid #cbd5e1;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  box-shadow: var(--shadow-subtle);
  margin-bottom: 22px;
}

.hero-pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--brand-emerald);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-main-title {
  font-size: 2.75rem;
  line-height: 1.2;
  font-weight: 850;
  color: var(--text-main);
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}

.hero-main-desc {
  font-size: 1.12rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 32px;
}

.hero-cta-cluster {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.hero-trust-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.86rem;
  color: var(--text-light);
  font-weight: 500;
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-trust-icon {
  color: var(--brand-primary);
  font-size: 1rem;
}

/* 右侧终端感实时监控组件 (动态拟真看板) */
.network-terminal {
  background-color: var(--bg-dark-panel);
  border: 1px solid #1e293b;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.35);
  color: #f1f5f9;
  overflow: hidden;
}

.network-terminal__bar {
  background-color: #0f172a;
  border-bottom: 1px solid #1e293b;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.network-terminal__dots {
  display: flex;
  gap: 6px;
}

.network-terminal__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.network-terminal__dot--red { background-color: #ef4444; }
.network-terminal__dot--yellow { background-color: #f59e0b; }
.network-terminal__dot--green { background-color: #10b981; }

.network-terminal__title {
  font-size: 0.78rem;
  font-family: monospace;
  color: #94a3b8;
  letter-spacing: 0.05em;
}

.network-terminal__body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-family: monospace;
}

.telemetry-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xs);
}

.telemetry-node {
  display: flex;
  align-items: center;
  gap: 10px;
}

.telemetry-flag {
  font-size: 1.1rem;
}

.telemetry-name {
  font-size: 0.88rem;
  color: #e2e8f0;
}

.telemetry-proto {
  font-size: 0.72rem;
  color: #64748b;
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
}

.telemetry-ping {
  font-size: 0.85rem;
  font-weight: 700;
  color: #10b981;
}

.telemetry-ping--blue {
  color: #38bdf8;
}

.telemetry-footer-status {
  font-size: 0.8rem;
  color: #94a3b8;
  border-top: 1px solid #1e293b;
  padding-top: 14px;
  display: flex;
  justify-content: space-between;
}

/* 通用区块排版 */
.section-block {
  padding: 70px 0;
}

.section-block--alt {
  background-color: #ffffff;
  border-top: 1px solid var(--border-hairline);
  border-bottom: 1px solid var(--border-hairline);
}

.section-header-compact {
  margin-bottom: 44px;
}

.section-header-compact__label {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--brand-primary);
  background-color: var(--brand-primary-glow);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.section-header-compact__title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.015em;
  margin-bottom: 10px;
}

.section-header-compact__desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
}

/* Bento Grid 现代非对称特性布局 */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.bento-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 30px;
  box-shadow: var(--shadow-subtle);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.bento-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-medium);
}

.bento-card--span-7 {
  grid-column: span 7;
}

.bento-card--span-5 {
  grid-column: span 5;
}

.bento-card--span-6 {
  grid-column: span 6;
}

.bento-card__badge-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.bento-card__badge {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  background-color: var(--brand-primary-glow);
  color: var(--brand-primary);
}

.bento-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-primary);
}

.bento-card__title {
  font-size: 1.35rem;
  font-weight: 750;
  color: var(--text-main);
  margin-bottom: 12px;
}

.bento-card__desc {
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 交互式影音与 AI 矩阵展示 */
.matrix-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.matrix-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-subtle);
}

.matrix-box__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 18px;
}

.matrix-box__icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--brand-primary-glow);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.matrix-box__title {
  font-size: 1.3rem;
  font-weight: 750;
  color: var(--text-main);
}

.chip-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.chip {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-hairline);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  transition: all 0.2s ease;
}

.chip:hover {
  border-color: var(--brand-primary);
  background-color: #ffffff;
}

.feature-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.feature-checklist__item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.feature-checklist__bullet {
  color: var(--brand-primary);
  font-weight: 800;
  margin-top: 1px;
}

/* 使用场景工作流卡片 */
.scenario-timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-brick {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-subtle);
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.scenario-brick__step-tag {
  font-size: 0.76rem;
  font-weight: 800;
  color: var(--brand-primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.scenario-brick__title {
  font-size: 1.22rem;
  font-weight: 750;
  color: var(--text-main);
  margin-bottom: 8px;
}

.scenario-brick__devices {
  font-size: 0.86rem;
  color: var(--brand-accent);
  font-weight: 600;
  background-color: #f0f9ff;
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  display: inline-block;
  margin-bottom: 16px;
}

.scenario-brick__text {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 交互式定价方案 (带月付 / 年付纯前端切换) */
.pricing-toolbar {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 36px;
}

.pricing-switch {
  background-color: #e2e8f0;
  padding: 4px;
  border-radius: var(--radius-full);
  display: inline-flex;
  gap: 4px;
}

.pricing-switch__btn {
  background: transparent;
  border: none;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.pricing-switch__btn--active {
  background-color: #ffffff;
  color: var(--text-main);
  box-shadow: var(--shadow-subtle);
}

.pricing-switch__discount {
  font-size: 0.75rem;
  color: #15803d;
  background: #dcfce7;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-left: 4px;
}

.pricing-deck {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-tile {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 34px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.25s ease;
}

.pricing-tile--prominent {
  border-color: var(--brand-primary);
  box-shadow: 0 10px 30px -5px rgba(29, 78, 216, 0.15);
  transform: scale(1.02);
  z-index: 2;
}

.pricing-tile__popular-ribbon {
  position: absolute;
  top: -14px;
  right: 28px;
  background: linear-gradient(135deg, #1d4ed8 0%, #0284c7 100%);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 8px rgba(29, 78, 216, 0.3);
}

.pricing-tile__audience {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 6px;
}

.pricing-tile__name {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
}

.pricing-tile__figure {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
}

.pricing-tile__currency {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.pricing-tile__amount {
  font-size: 2.75rem;
  font-weight: 850;
  color: var(--text-main);
  line-height: 1;
}

.pricing-tile__unit {
  font-size: 0.92rem;
  color: var(--text-light);
}

.pricing-tile__features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  border-top: 1px solid var(--border-hairline);
  padding-top: 22px;
  margin-bottom: 30px;
  flex-grow: 1;
}

.pricing-tile__feature-item {
  font-size: 0.94rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-tile__feature-check {
  color: var(--brand-primary);
  font-weight: 800;
}

/* FAQ 详情折叠项 (原生支持 + 编号设计) */
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

details.faq-accordion__node {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-subtle);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

details.faq-accordion__node[open] {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-card);
}

summary.faq-accordion__trigger {
  padding: 20px 24px;
  font-size: 1.1rem;
  font-weight: 750;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  min-height: 52px;
}

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

.faq-accordion__title-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.faq-accordion__number {
  font-size: 0.85rem;
  font-family: monospace;
  color: var(--brand-primary);
  background-color: var(--brand-primary-glow);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.faq-accordion__indicator {
  font-size: 1.25rem;
  color: var(--brand-primary);
  transition: transform 0.2s ease;
  line-height: 1;
}

details.faq-accordion__node[open] .faq-accordion__indicator {
  transform: rotate(45deg);
}

.faq-accordion__content {
  padding: 0 24px 22px 66px;
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* Final CTA 尊享暗黑渐变横幅 */
.final-cta-banner {
  background: radial-gradient(circle at top right, #1e293b 0%, #0b1120 100%);
  color: #ffffff;
  padding: 72px 0;
  border-top: 1px solid #1e293b;
  position: relative;
  overflow: hidden;
}

.final-cta-banner__container {
  max-width: 740px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 2;
}

.final-cta-banner__title {
  font-size: 2.25rem;
  font-weight: 850;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.final-cta-banner__desc {
  font-size: 1.1rem;
  color: #94a3b8;
  line-height: 1.7;
  margin-bottom: 32px;
}

/* 简约合规页脚 */
.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--border-hairline);
  padding: 44px 0 30px;
  margin-top: auto;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.site-footer__nav-cluster {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.site-footer__link {
  color: var(--text-muted);
  font-weight: 500;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.site-footer__link:hover {
  color: var(--brand-primary);
}

.site-footer__disclosure {
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 16px;
}

.site-footer__copyright {
  border-top: 1px solid var(--border-hairline);
  padding-top: 20px;
  text-align: center;
  font-size: 0.84rem;
  color: var(--text-light);
}

/* 文章双栏排版系统 (左侧大纲悬浮 + 右侧沉浸正文) */
.article-split-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
  margin-top: 24px;
}

.article-toc-sticky {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 20px;
  box-shadow: var(--shadow-subtle);
}

.article-toc-title {
  font-size: 0.92rem;
  font-weight: 750;
  color: var(--text-main);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 6px;
}

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

.article-toc-link {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.4;
  display: block;
}

.article-toc-link:hover {
  color: var(--brand-primary);
  text-decoration: underline;
}

.article-content-body {
  font-size: 1.05rem;
  color: var(--text-main);
  line-height: 1.85;
}

.article-takeaways-callout {
  background: #f0fdf4;
  border-left: 4px solid var(--brand-emerald);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 20px 24px;
  margin-bottom: 28px;
}

.article-takeaways-title {
  font-size: 1.05rem;
  font-weight: 750;
  color: #166534;
  margin-bottom: 8px;
}

.article-content-body h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 40px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-hairline);
}

.article-content-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 26px 0 12px;
}

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

.article-content-body ul, .article-content-body ol {
  margin-bottom: 22px;
  padding-left: 24px;
}

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

.article-content-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.94rem;
  background-color: #ffffff;
  border-radius: var(--radius-xs);
  overflow: hidden;
  box-shadow: var(--shadow-subtle);
}

.article-content-body th, .article-content-body td {
  border: 1px solid var(--border-hairline);
  padding: 12px 16px;
  text-align: left;
}

.article-content-body th {
  background-color: var(--bg-subtle);
  font-weight: 700;
  color: var(--text-main);
}

.article-cta-box-dynamic {
  background: linear-gradient(135deg, #eff6ff 0%, #f0fdfa 100%);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  margin: 44px 0 32px;
  box-shadow: var(--shadow-subtle);
}

.article-cta-box-dynamic__title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}

.article-cta-box-dynamic__desc {
  font-size: 0.98rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}

/* 移动端吸底 CTA */
.mobile-bottom-dock {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-hairline);
  padding: 10px 16px;
  box-shadow: 0 -4px 16px rgba(15, 23, 42, 0.08);
  z-index: 999;
  transform: translateY(100%);
  transition: transform 0.25s ease-in-out;
}

.mobile-bottom-dock--active {
  transform: translateY(0);
}

.mobile-bottom-dock__btn {
  width: 100%;
}

/* 响应式断点控制 */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .bento-card--span-7,
  .bento-card--span-5,
  .bento-card--span-6 {
    grid-column: span 12;
  }
  .matrix-container {
    grid-template-columns: 1fr;
  }
  .scenario-timeline {
    grid-template-columns: 1fr;
  }
  .pricing-deck {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  .pricing-tile--prominent {
    transform: none;
  }
  .article-split-layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .article-toc-sticky {
    position: static;
    margin-bottom: 20px;
  }
}

@media (max-width: 768px) {
  .hero-main-title {
    font-size: 2rem;
  }
  .hero-main-desc {
    font-size: 1rem;
  }
  .menu-toggle {
    display: inline-flex;
  }
  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-hairline);
    flex-direction: column;
    padding: 20px 24px;
    gap: 14px;
    box-shadow: var(--shadow-card);
  }
  .site-nav--open {
    display: flex;
  }
  .site-nav__link {
    width: 100%;
  }
  .site-nav__btn {
    width: 100%;
  }
  .mobile-bottom-dock {
    display: block;
  }
  body {
    padding-bottom: 68px;
  }
  .faq-accordion__content {
    padding-left: 24px;
  }
}