/* ==========================================================================
   大哥云机场官网 (dage-cloud.click)
   设计系统：极简扁平风格 (Minimal Flat Design) + 灵动微动态点缀
   ========================================================================== */

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

  /* 调色盘：极简纯粹 + 点睛色调 */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --border-light: #e2e8f0;
  --border-dark: #1e293b;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  /* 核心功能强调色（参考图1扁平黑 + 图2明亮绿/科技蓝） */
  --color-black: #000000;
  --color-brand-green: #059669;
  --color-badge-green: #10b981;
  --color-badge-bg: #ecfdf5;
  --color-brand-blue: #2563eb;
  --color-blue-hover: #1d4ed8;
  --color-highlight-border: #4ade80;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --transition-base: all 0.24s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-primary);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
  overflow-x: hidden;
  background-color: var(--bg-primary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-base);
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ================= 动态网格背景装饰 ================= */
.dynamic-grid-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 600px;
  background-image: 
    linear-gradient(to right, rgba(0, 0, 0, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 0%, #000 70%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 0%, #000 70%, transparent 100%);
  pointer-events: none;
  z-index: -1;
}

/* ================= 顶部通知条 ================= */
.top-notice-bar {
  background: #000000;
  color: #ffffff;
  padding: 8px 16px;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  letter-spacing: 0.02em;
}

.top-notice-bar .badge-pulse {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* ================= 导航栏 Header ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-black);
}

.logo-square {
  width: 36px;
  height: 36px;
  background: #000;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  font-weight: 900;
  font-size: 18px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease;
}

.brand-logo:hover .logo-square {
  transform: rotate(-4deg) scale(1.05);
}

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

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}

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

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

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-minimal-outline {
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-black);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  background: transparent;
  transition: var(--transition-base);
}

.btn-minimal-outline:hover {
  background: var(--color-black);
  color: #ffffff;
}

.btn-minimal-black {
  padding: 9px 20px;
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  background: var(--color-black);
  border: 1px solid var(--color-black);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.btn-minimal-black:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  background: #222222;
}

.mobile-toggle {
  display: none;
  font-size: 24px;
}

/* ================= Hero 区域 ================= */
.hero-section {
  padding: 72px 0 60px;
  text-align: center;
  position: relative;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(32px, 5vw, 54px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-black);
  margin-bottom: 20px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-desc {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-btn-primary {
  padding: 14px 34px;
  font-size: 15px;
  font-weight: 700;
  background: var(--color-black);
  color: #fff;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.16);
  transition: var(--transition-base);
}

.hero-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

.hero-btn-secondary {
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  background: #ffffff;
  color: var(--color-black);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition-base);
}

.hero-btn-secondary:hover {
  border-color: var(--color-black);
  background: var(--bg-secondary);
}

/* 核心亮点特征栏 */
.hero-features-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  max-width: 1040px;
  margin: 0 auto;
  text-align: left;
}

.feature-pill {
  background: #ffffff;
  border: 1px solid var(--border-light);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: flex-start;
  gap: 14px;
  transition: var(--transition-base);
}

.feature-pill:hover {
  border-color: var(--border-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.feature-icon-box {
  width: 38px;
  height: 38px;
  background: var(--bg-secondary);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.feature-pill-content h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 2px;
}

.feature-pill-content p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ================= 极简扁平风格理念展台 (参考图1) ================= */
.minimal-philosophy-banner {
  margin: 50px auto;
  max-width: 960px;
  border: 2px solid var(--color-black);
  padding: 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: #ffffff;
}

.minimal-philosophy-banner .text-col .subtitle {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-light);
  font-weight: 700;
}

.minimal-philosophy-banner .text-col .title {
  font-size: 26px;
  font-weight: 900;
  color: var(--color-black);
  margin: 4px 0 6px;
}

.minimal-philosophy-banner .text-col .tagline {
  font-size: 15px;
  color: var(--text-muted);
}

.minimal-action-btn {
  background: #000;
  color: #fff;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid #000;
  transition: var(--transition-base);
}

.minimal-action-btn:hover {
  background: transparent;
  color: #000;
}

/* ================= 套餐价格卡片 (完美还原图2) ================= */
.pricing-section {
  padding: 80px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-head {
  text-align: center;
  margin-bottom: 50px;
}

.section-subtitle {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-brand-blue);
  margin-bottom: 8px;
}

.section-title {
  font-size: 32px;
  font-weight: 900;
  color: var(--color-black);
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 15px;
  color: var(--text-muted);
  margin-top: 8px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.pricing-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
}

/* 图2 经典卡片样式 */
.pricing-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 18px;
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
}

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

/* 中间高亮套餐 (图2风格) */
.pricing-card.highlight {
  border: 1.5px solid var(--color-highlight-border);
  box-shadow: 0 10px 25px -5px rgba(74, 222, 128, 0.15);
}

.pricing-card-header {
  text-align: center;
  margin-bottom: 24px;
}

.plan-name {
  font-size: 18px;
  font-weight: 800;
  color: #111827;
  margin-bottom: 16px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  margin-bottom: 12px;
}

.plan-price-symbol {
  font-size: 26px;
  font-weight: 800;
  color: #000000;
}

.plan-price-num {
  font-size: 42px;
  font-weight: 900;
  color: #000000;
  line-height: 1;
}

.plan-price-period {
  font-size: 14px;
  color: #64748b;
  font-weight: 500;
  margin-left: 4px;
}

/* 绿色超值胶囊标签 (图2) */
.value-pill {
  display: inline-block;
  background-color: var(--color-badge-green);
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  margin-top: 6px;
}

.plan-features-list {
  list-style: none;
  margin: 24px 0 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: #1f2937;
  font-weight: 500;
}

/* 图2 绿色对勾小图标 */
.check-icon-circle {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #10b981;
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 900;
  flex-shrink: 0;
}

.plan-feature-note {
  text-align: center;
  font-size: 12px;
  color: #94a3b8;
  margin-top: auto;
  margin-bottom: 24px;
}

/* 图2 蓝色线框购买按钮 */
.btn-buy-outline {
  width: 100%;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-brand-blue);
  border: 1.5px solid var(--color-brand-blue);
  border-radius: 8px;
  background: #ffffff;
  text-align: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition-base);
}

.btn-buy-outline:hover {
  background: var(--color-brand-blue);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

/* ================= 实时节点网络与测速模拟 ================= */
.node-network-section {
  padding: 80px 0;
  background: #ffffff;
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.node-card {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 20px;
  background: #ffffff;
  transition: var(--transition-base);
}

.node-card:hover {
  border-color: var(--border-dark);
  box-shadow: var(--shadow-md);
}

.node-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.node-flag-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
}

.ping-tag {
  font-size: 12px;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-brand-green);
  background: var(--color-badge-bg);
  padding: 2px 8px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.node-details {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
}

.node-bar-container {
  height: 4px;
  background: var(--border-light);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 10px;
}

.node-bar-fill {
  height: 100%;
  background: var(--color-black);
  border-radius: 2px;
}

/* ================= 客户端下载全平台支持 ================= */
.clients-section {
  padding: 80px 0;
  background: var(--bg-secondary);
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.client-item-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition-base);
}

.client-item-card:hover {
  border-color: var(--color-black);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.client-icon {
  font-size: 36px;
  margin-bottom: 14px;
}

.client-name {
  font-size: 17px;
  font-weight: 800;
  color: var(--color-black);
  margin-bottom: 6px;
}

.client-sub {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.client-dl-btn {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-black);
  border: 1px solid var(--border-light);
  padding: 8px 16px;
  border-radius: 6px;
  display: inline-block;
  transition: var(--transition-base);
}

.client-item-card:hover .client-dl-btn {
  background: var(--color-black);
  color: #ffffff;
  border-color: var(--color-black);
}

/* ================= AI 工具导航区 ================= */
.ai-tools-section {
  padding: 80px 0;
  background: #ffffff;
}

.ai-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.ai-tool-card {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition-base);
}

.ai-tool-card:hover {
  border-color: var(--color-black);
  box-shadow: var(--shadow-md);
}

.ai-tool-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: #000;
  color: #fff;
  margin-bottom: 12px;
}

.ai-tool-title {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 8px;
}

.ai-tool-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
}

.ai-unlock-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-brand-green);
}

/* ================= 9篇深度评测专栏矩阵 ================= */
.articles-matrix-section {
  padding: 80px 0;
  background: var(--bg-secondary);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.article-matrix-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-base);
}

.article-matrix-card:hover {
  border-color: var(--color-black);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 12px;
  color: var(--text-light);
}

.article-tag {
  background: var(--bg-secondary);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.article-card-title {
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--color-black);
  margin-bottom: 10px;
}

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

.article-card-excerpt {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 600;
  border-top: 1px solid var(--border-light);
  padding-top: 14px;
}

.read-more-link {
  color: var(--color-black);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.read-more-link:hover {
  gap: 8px;
}

/* ================= 常见问题 FAQ 手风琴 ================= */
.faq-section {
  padding: 80px 0;
  background: #ffffff;
}

.faq-container {
  max-width: 860px;
  margin: 40px auto 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: #ffffff;
  overflow: hidden;
  transition: var(--transition-base);
}

.faq-item.active {
  border-color: var(--color-black);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-black);
  text-align: left;
}

.faq-chevron {
  font-size: 14px;
  transition: transform 0.2s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  background: #fafafa;
}

.faq-answer-inner {
  padding: 0 24px 22px;
  font-size: 14px;
  color: #334155;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 1000px;
  transition: max-height 0.4s ease-in-out;
}

/* ================= 文章内页样式 (Post Page) ================= */
.post-layout {
  padding: 60px 0 100px;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumbs a:hover {
  color: var(--color-black);
}

.post-header {
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 28px;
  margin-bottom: 36px;
}

.post-badge-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.post-title {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--color-black);
  margin-bottom: 18px;
}

.post-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.post-main-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
}

.post-content {
  font-size: 16px;
  line-height: 1.8;
  color: #1e293b;
}

.post-content h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-black);
  margin: 40px 0 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid #000;
  letter-spacing: -0.01em;
}

.post-content h3 {
  font-size: 19px;
  font-weight: 700;
  color: #111827;
  margin: 28px 0 12px;
}

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

.post-content ul, .post-content ol {
  margin: 16px 0 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.post-content li {
  line-height: 1.7;
}

.post-content strong {
  font-weight: 700;
  color: var(--color-black);
}

.post-content blockquote {
  border-left: 4px solid var(--color-black);
  padding: 14px 20px;
  background: var(--bg-secondary);
  font-style: italic;
  margin: 24px 0;
  color: #334155;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 14px;
}

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

.post-content th {
  background: #f1f5f9;
  font-weight: 700;
  color: var(--color-black);
}

.post-content tr:nth-child(even) td {
  background: #fbfcfd;
}

/* 文章内直接购买/注册卡片 */
.post-cta-box {
  background: #000000;
  color: #ffffff;
  padding: 32px;
  border-radius: var(--radius-md);
  margin: 36px 0;
  text-align: center;
}

.post-cta-box h3 {
  color: #ffffff;
  font-size: 22px;
  margin-bottom: 10px;
}

.post-cta-box p {
  color: #cbd5e1;
  font-size: 14px;
  margin-bottom: 24px;
}

.btn-cta-light {
  background: #ffffff;
  color: #000000;
  font-weight: 800;
  padding: 12px 30px;
  border-radius: 4px;
  display: inline-block;
  transition: var(--transition-base);
}

.btn-cta-light:hover {
  background: #e2e8f0;
  transform: translateY(-2px);
}

/* 文章内部导航与互相推荐 */
.post-interlinks {
  margin: 48px 0;
  padding: 24px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
}

.post-interlinks h4 {
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--color-black);
}

.post-interlinks-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
  list-style: none;
}

.post-interlinks-list li a {
  font-size: 14px;
  color: var(--color-brand-blue);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.post-interlinks-list li a:hover {
  text-decoration: underline;
}

/* 侧边栏 Sidebar */
.post-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-sticky-widget {
  position: sticky;
  top: 96px;
}

.sidebar-card {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  background: #ffffff;
  margin-bottom: 24px;
}

.sidebar-card-title {
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

/* ================= 底部 Footer ================= */
.site-footer {
  background: #000000;
  color: #94a3b8;
  padding: 60px 0 30px;
  font-size: 13px;
  border-top: 1px solid #1e293b;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .footer-logo {
  font-size: 20px;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 14px;
}

.footer-brand p {
  line-height: 1.6;
  max-width: 320px;
}

.footer-col-title {
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
  letter-spacing: 0.04em;
}

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

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-keywords-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.f-tag {
  background: #111827;
  color: #94a3b8;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
}

/* ================= 响应式适配 ================= */
@media (max-width: 992px) {
  .pricing-cards-grid {
    grid-template-columns: 1fr;
    max-width: 440px;
  }
  .post-main-grid {
    grid-template-columns: 1fr;
  }
  .sidebar-sticky-widget {
    position: static;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg);
  }
  .nav-menu.open {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .minimal-philosophy-banner {
    flex-direction: column;
    text-align: center;
    padding: 24px;
  }
}