/* ==========================================================================
   流量光官网 (Liuliangguang) - 全局核心样式表
   极速·稳定·安全·智能分流 | 现代化暗色科技风 + 动态视觉动效
   ========================================================================== */

:root {
  --primary: #0ea5e9;
  --primary-light: #38bdf8;
  --primary-dark: #0284c7;
  --primary-glow: rgba(14, 165, 233, 0.35);
  --accent: #6366f1;
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  
  --bg-main: #070b14;
  --bg-surface: #0f172a;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(56, 189, 248, 0.28);
  
  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 35px -5px var(--primary-glow);
  --shadow-glow-purple: 0 0 35px -5px rgba(139, 92, 246, 0.35);
  
  --container-max: 1240px;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础重置 */
*, *::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-main);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #1e1b4b 0%, #070b14 45%, #05070d 100%);
  background-attachment: fixed;
}

/* 动态背景画布 */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

/* 顶部阅读进度条 */
#reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--accent-purple), var(--accent-pink));
  z-index: 9999;
  transition: width 0.1s ease-out;
}

/* 布局容器 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  position: relative;
  z-index: 1;
}

/* 排版与文字 */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.015em;
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: #fff;
  text-shadow: 0 0 10px var(--primary-glow);
}

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

/* 渐变标题特效 */
.gradient-text {
  background: linear-gradient(135deg, #ffffff 10%, #38bdf8 55%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-text-alt {
  background: linear-gradient(135deg, #f43f5e 10%, #fb923c 60%, #fbbf24 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 顶部导航栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(7, 11, 20, 0.82);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.5px;
}

.brand-logo svg {
  filter: drop-shadow(0 0 10px rgba(14, 165, 233, 0.7));
  transition: transform 0.3s ease;
}

.brand-logo:hover svg {
  transform: rotate(15deg) scale(1.1);
}

.brand-badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  background: rgba(14, 165, 233, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--primary-light);
  border-radius: var(--radius-full);
  margin-left: 4px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: #fff;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary-light);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--primary-light);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* 按钮系统 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 50%, #38bdf8 100%);
  color: #ffffff;
  box-shadow: 0 4px 20px -2px var(--primary-glow);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px 2px var(--primary-glow);
  color: #fff;
}

.btn-secondary {
  background: rgba(30, 41, 59, 0.8);
  color: #e2e8f0;
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(51, 65, 85, 0.9);
  border-color: var(--border-glow);
  color: #fff;
  transform: translateY(-2px);
}

.btn-glow-gold {
  background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
  color: #1e1b4b;
  font-weight: 700;
  box-shadow: 0 4px 20px -2px rgba(245, 158, 11, 0.4);
}

.btn-glow-gold:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.6);
  color: #0f172a;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.1rem;
  border-radius: var(--radius-lg);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 6px;
}

/* 首屏 Hero 区域 */
.hero-section {
  padding: 6rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero-glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  z-index: -1;
  pointer-events: none;
  animation: pulseGlow 8s infinite alternate ease-in-out;
}

.hero-glow-1 {
  width: 450px;
  height: 450px;
  background: rgba(14, 165, 233, 0.22);
  top: -80px;
  left: 20%;
}

.hero-glow-2 {
  width: 400px;
  height: 400px;
  background: rgba(139, 92, 246, 0.18);
  top: 15%;
  right: 15%;
  animation-delay: -3s;
}

@keyframes pulseGlow {
  0% { transform: scale(1) translate(0, 0); opacity: 0.7; }
  100% { transform: scale(1.18) translate(25px, -15px); opacity: 1; }
}

.hero-content {
  text-align: center;
  max-width: 920px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  color: var(--primary-light);
  margin-bottom: 1.8rem;
  box-shadow: 0 0 15px rgba(14, 165, 233, 0.15);
  animation: floatBadge 3s ease-in-out infinite alternate;
}

@keyframes floatBadge {
  0% { transform: translateY(0); }
  100% { transform: translateY(-6px); }
}

.hero-pill .dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 8px #10b981;
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.18;
  margin-bottom: 1.5rem;
  letter-spacing: -0.025em;
}

.hero-description {
  font-size: 1.25rem;
  line-height: 1.7;
  color: #cbd5e1;
  max-width: 780px;
  margin: 0 auto 2.5rem;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding: 2rem;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.metric-item {
  text-align: center;
  border-right: 1px solid var(--border-subtle);
}

.metric-item:last-child {
  border-right: none;
}

.metric-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, #fff 20%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.metric-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* 通用板块结构 */
.section {
  padding: 5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem;
}

.section-badge {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--primary-light);
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-full);
  margin-bottom: 0.8rem;
}

.section-title {
  font-size: 2.4rem;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* 核心优势卡片网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.8rem;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--primary-light);
}

.feature-title {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.feature-desc {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* 套餐价格区域 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(20, 30, 55, 0.95) 0%, rgba(15, 23, 42, 0.9) 100%);
  border: 2px solid var(--primary-light);
  box-shadow: var(--shadow-glow);
  transform: scale(1.04);
  z-index: 2;
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  right: 25px;
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  color: #fff;
  padding: 4px 14px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.4);
}

.pricing-header {
  margin-bottom: 1.8rem;
  text-align: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.plan-name {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  min-height: 40px;
}

.plan-price {
  margin: 1.5rem 0 0.5rem;
  display: flex;
  align-items: baseline;
  justify-content: center;
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-main);
  margin-right: 4px;
}

.price-amount {
  font-size: 3.2rem;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-mono);
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-left: 6px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 2.5rem;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: #cbd5e1;
  padding: 8px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
}

.pricing-features li svg {
  flex-shrink: 0;
  color: var(--accent-emerald);
}

.pricing-features li.disabled {
  color: var(--text-muted);
  text-decoration: line-through;
}

.pricing-features li.disabled svg {
  color: var(--text-muted);
}

/* 适合人群区域 */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.audience-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  transition: var(--transition);
}

.audience-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
}

.audience-tag {
  font-size: 0.75rem;
  padding: 3px 8px;
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 1rem;
}

.audience-title {
  font-size: 1.18rem;
  margin-bottom: 0.6rem;
}

.audience-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Clash & Clash Party 教程展示区 */
.tutorial-showcase {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  backdrop-filter: blur(12px);
}

.tutorial-tabs {
  display: flex;
  gap: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
}

.tutorial-tab-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}

.tutorial-tab-btn.active {
  background: rgba(14, 165, 233, 0.15);
  border-color: var(--primary-light);
  color: #fff;
  box-shadow: 0 0 15px rgba(14, 165, 233, 0.25);
}

.tutorial-panel {
  display: none;
}

.tutorial-panel.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.step-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.step-card {
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  position: relative;
}

.step-badge {
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  box-shadow: 0 0 10px var(--primary-glow);
}

.step-title {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.step-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 用户真实评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
}

.review-stars {
  color: #fbbf24;
  margin-bottom: 1rem;
  display: flex;
  gap: 3px;
}

.review-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: #cbd5e1;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 1rem;
}

.author-name {
  font-weight: 600;
  color: #fff;
  font-size: 0.95rem;
}

.author-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ 常见问题折叠 */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--border-glow);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.faq-question {
  width: 100%;
  padding: 1.3rem 1.6rem;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 1.08rem;
  font-weight: 600;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-question svg {
  transition: transform 0.3s ease;
  color: var(--primary-light);
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  padding: 0 1.6rem;
}

.faq-item.active .faq-answer {
  padding: 0 1.6rem 1.4rem;
}

.faq-answer p {
  color: #cbd5e1;
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
}

/* 文章目录卡片 */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.article-thumb {
  width: 100%;
  height: 190px;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.article-thumb-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(14, 165, 233, 0.85);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.article-body {
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-title {
  font-size: 1.22rem;
  line-height: 1.45;
  margin-bottom: 0.8rem;
}

.article-title a {
  color: #fff;
}

.article-title a:hover {
  color: var(--primary-light);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
}

.read-more {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary-light);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

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

/* 转化条 Banner */
.cta-banner {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.15) 0%, rgba(99, 102, 241, 0.2) 100%);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glow);
}

.cta-banner h2 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.cta-banner p {
  font-size: 1.1rem;
  max-width: 680px;
  margin: 0 auto 2rem;
  color: #e2e8f0;
}

/* 页脚 */
.site-footer {
  background: #04070e;
  border-top: 1px solid var(--border-subtle);
  padding: 4.5rem 0 2rem;
  margin-top: 5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin: 1rem 0 1.5rem;
  max-width: 340px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1.2rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-legal-links {
  display: flex;
  gap: 1.5rem;
}

.footer-legal-links a {
  color: var(--text-muted);
}

.footer-legal-links a:hover {
  color: var(--text-secondary);
}

/* 悬浮快捷转化按钮 (Mobile/Sticky) */
.floating-cta {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 990;
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 8px 30px rgba(14, 165, 233, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: var(--transition);
  animation: floatPulse 3s ease-in-out infinite alternate;
}

.floating-cta:hover {
  transform: scale(1.06) translateY(-2px);
  box-shadow: 0 12px 36px rgba(14, 165, 233, 0.8);
  color: #fff;
}

@keyframes floatPulse {
  0% { transform: translateY(0); }
  100% { transform: translateY(-5px); }
}

/* ==========================================================================
   文章详情页专有样式 (深度排版优化 1800+ 字长文阅读)
   ========================================================================== */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 2rem 0 1.5rem;
  flex-wrap: wrap;
}

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

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

.breadcrumbs .separator {
  color: var(--text-muted);
}

.article-header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 2rem;
}

.article-header h1 {
  font-size: 2.4rem;
  line-height: 1.3;
  margin-bottom: 1.2rem;
}

.article-header-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.article-header-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3rem;
  align-items: start;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-content h2 {
  font-size: 1.7rem;
  margin: 2.5rem 0 1.2rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  color: #fff;
}

.article-content h3 {
  font-size: 1.3rem;
  margin: 1.8rem 0 0.8rem;
  color: #f1f5f9;
}

.article-content p {
  margin-bottom: 1.3rem;
}

.article-content ul, .article-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
  color: #cbd5e1;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content strong {
  color: #fff;
  font-weight: 700;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(14, 165, 233, 0.08);
  padding: 1.2rem 1.5rem;
  margin: 1.8rem 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: #e2e8f0;
  font-size: 1rem;
}

.article-content .callout-box {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 2rem 0;
}

.article-content .callout-box.tip {
  border-left: 4px solid #10b981;
}

.article-content .callout-box.warning {
  border-left: 4px solid #f59e0b;
}

.article-content .table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.article-content th {
  background: #1e293b;
  color: #fff;
  padding: 12px 16px;
  font-weight: 600;
  border-bottom: 1px solid var(--border-subtle);
}

.article-content td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: #cbd5e1;
}

.article-content tr:nth-child(even) td {
  background: rgba(15, 23, 42, 0.4);
}

.article-content code {
  font-family: var(--font-mono);
  background: rgba(30, 41, 59, 0.8);
  color: #38bdf8;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}

.article-content pre {
  background: #0f172a;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}

.article-content pre code {
  background: transparent;
  padding: 0;
  color: #e2e8f0;
}

/* 侧边栏 */
.article-sidebar {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.sidebar-title {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: #fff;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.5rem;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: 0.88rem;
}

.toc-list a {
  color: var(--text-secondary);
  display: block;
  line-height: 1.4;
}

.toc-list a:hover {
  color: var(--primary-light);
}

.sidebar-promo {
  text-align: center;
  background: linear-gradient(180deg, rgba(14, 165, 233, 0.15), rgba(15, 23, 42, 0.9));
  border: 1px solid var(--border-glow);
}

/* 文章末尾相关推荐卡片 */
.related-posts {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 1.2rem;
}

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.3rem;
  transition: var(--transition);
}

.related-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

/* 响应式媒体查询 */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
  .pricing-card.featured {
    transform: none;
  }
  .audience-grid, .step-flow {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin: 0 auto;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.3rem;
  }
  .hero-description {
    font-size: 1.05rem;
  }
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    padding: 1.2rem;
  }
  .metric-item:nth-child(2) {
    border-right: none;
  }
  .metric-item {
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 1rem;
  }
  .metric-item:nth-child(3), .metric-item:nth-child(4) {
    border-bottom: none;
    padding-bottom: 0;
  }
  .audience-grid, .step-flow {
    grid-template-columns: 1fr;
  }
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #090e1a;
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
    display: none;
  }
  .nav-menu.open {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .related-posts-grid {
    grid-template-columns: 1fr;
  }
  .floating-cta {
    left: 16px;
    right: 16px;
    justify-content: center;
    bottom: 16px;
  }
}