/* ==========================================================================
   GieGie Cloud (giegiecloud.homes) - 官方极速原生样式表
   零外部依赖 | 纯原生 CSS3 | 秒开级性能 | 响应式自适应
   ========================================================================== */

:root {
  --bg-dark: #070b14;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(22, 33, 62, 0.85);
  --bg-card-highlight: rgba(30, 41, 79, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(192, 132, 252, 0.4);
  
  --primary: #c084fc;
  --primary-light: #f5d0fe;
  --primary-gradient: linear-gradient(135deg, #f5d0fe 0%, #c084fc 48%, #9333ea 100%);
  --accent-purple: #a855f7;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 25px rgba(192, 132, 252, 0.28);
  --shadow-glow-purple: 0 0 30px rgba(168, 85, 247, 0.35);
  
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--bg-dark);
}

/* 动态背景 Canvas (各种形态各异的动态冰紫科技云朵) */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

/* 动态极光氛围光层 (纯原生 CSS GPU 渲染) */
.aurora-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

main {
  position: relative;
  z-index: 1;
}

.aurora-blob {
  position: absolute;
  filter: blur(90px);
  opacity: 0.18;
  border-radius: 50%;
  will-change: transform;
}

.aurora-1 {
  top: -10%;
  left: 15%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #c084fc 0%, #7e22ce 65%, transparent 100%);
  animation: floatSlow 22s ease-in-out infinite alternate;
}

.aurora-2 {
  top: 40%;
  right: -5%;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, #7928ca 0%, #ff0080 60%, transparent 100%);
  animation: floatSlow 28s ease-in-out infinite alternate-reverse;
}

.aurora-3 {
  bottom: -15%;
  left: 25%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #0ea5e9 0%, #10b981 70%, transparent 100%);
  animation: floatSlow 32s ease-in-out infinite alternate;
}

@keyframes floatSlow {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 40px) scale(1.1); }
  100% { transform: translate(-40px, 80px) scale(0.95); }
}

/* 容器定义 */
.container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部导航 Header */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo-wrapper {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.site-logo {
  height: 48px;
  width: auto;
  display: block;
  transition: transform 0.25s ease;
}

.logo-wrapper:hover .site-logo {
  transform: scale(1.02);
}

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

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 6px 2px;
}

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

.nav-link:hover::after, .nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary-gradient);
  border-radius: 2px;
}

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

/* 通用按钮系统 (纯 CSS，极致性能) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #070b14;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(192, 132, 252, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(192, 132, 252, 0.6);
  color: #000000;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.16);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 7px 16px;
  font-size: 13px;
}

.btn-lg {
  padding: 14px 34px;
  font-size: 16px;
}

.btn-glow {
  position: relative;
  overflow: hidden;
}

.btn-glow::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(60deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: rotate(30deg);
  animation: shine 5s infinite;
}

@keyframes shine {
  0% { transform: translateX(-100%) rotate(30deg); }
  25%, 100% { transform: translateX(100%) rotate(30deg); }
}

/* 移动端菜单按钮 */
.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-color);
  color: #ffffff;
  font-size: 22px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* 英雄首屏 Hero Section */
.hero-section {
  padding: 70px 0 60px;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  background: rgba(192, 132, 252, 0.12);
  border: 1px solid rgba(192, 132, 252, 0.35);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: #e9d5ff;
  margin-bottom: 24px;
}

.hero-pill-badge {
  background: var(--primary-gradient);
  color: #070b14;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(34px, 5.2vw, 58px);
  font-weight: 900;
  line-height: 1.18;
  margin-bottom: 22px;
  letter-spacing: -0.5px;
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 15%, #f5d0fe 40%, #c084fc 70%, #9333ea 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.hero-trust-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  color: var(--text-dim);
  font-size: 13px;
  margin-bottom: 45px;
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-trust-item svg {
  color: var(--accent-green);
}

/* 核心网络数据指标展示 */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 1040px;
  margin: 0 auto;
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  padding: 22px 18px;
  border-radius: var(--radius-md);
  text-align: center;
  transition: var(--transition);
}

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

.stat-val {
  font-size: 32px;
  font-weight: 800;
  color: #ffffff;
  display: block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.stat-unit {
  font-size: 16px;
  color: var(--primary);
  font-weight: 600;
  margin-left: 2px;
}

.stat-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* 通用 Section 标题规范 */
.section-header {
  text-align: center;
  margin-bottom: 52px;
}

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-full);
  color: #c084fc;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.6;
}

/* 核心优势卡片 Features */
.features-section {
  padding: 80px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-box {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

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

.feature-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(192, 132, 252, 0.12);
  border: 1px solid rgba(192, 132, 252, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 22px;
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   价格套餐模块 (严格要求：所有价格同排，桌面端 5 列并列)
   ========================================================================== */
.pricing-section {
  padding: 90px 0 80px;
  position: relative;
}

.pricing-notice-banner {
  background: rgba(192, 132, 252, 0.08);
  border: 1px dashed rgba(192, 132, 252, 0.35);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  text-align: center;
  font-size: 13px;
  color: #e9d5ff;
  max-width: 780px;
  margin: 0 auto 36px;
}

/* 核心：桌面端严格 5 列并列同排 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(192, 132, 252, 0.45);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), var(--shadow-glow);
}

/* 爆款推荐高亮卡片 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(30, 41, 79, 0.95) 0%, rgba(15, 23, 42, 0.95) 100%);
  border: 2px solid var(--primary);
  box-shadow: 0 0 35px rgba(192, 132, 252, 0.35);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-6px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #070b14;
  font-size: 11px;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(192, 132, 252, 0.45);
  white-space: nowrap;
}

.plan-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 18px;
  margin-bottom: 18px;
}

.plan-badge-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}

.plan-name {
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.5;
  min-height: 36px;
}

.plan-price-box {
  margin-bottom: 22px;
}

.price-currency {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  vertical-align: top;
  margin-right: 2px;
}

.price-num {
  font-size: 38px;
  font-weight: 900;
  color: #ffffff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;
  line-height: 1;
}

.price-unit {
  font-size: 13px;
  color: var(--text-muted);
  margin-left: 2px;
}

.price-sub {
  font-size: 12px;
  color: #10b981;
  margin-top: 6px;
  font-weight: 500;
}

.plan-features-list {
  list-style: none;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.plan-features-list li {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.45;
}

.plan-features-list li strong {
  color: #ffffff;
  font-weight: 600;
}

.check-icon {
  color: #c084fc;
  font-size: 14px;
  line-height: 1.3;
  flex-shrink: 0;
}

.plan-cta-btn {
  width: 100%;
  margin-top: auto;
}

/* 节点覆盖与延迟 Section */
.nodes-section {
  padding: 80px 0;
  background: rgba(11, 19, 41, 0.4);
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.node-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 18px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}

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

.node-flag {
  font-size: 32px;
  line-height: 1;
}

.node-info {
  flex: 1;
}

.node-name {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
}

.node-detail {
  font-size: 12px;
  color: var(--text-dim);
}

.node-ping {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.ping-tag {
  font-size: 12px;
  font-weight: 700;
  color: #10b981;
  font-family: monospace;
}

.ping-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
  display: inline-block;
  margin-top: 4px;
}

/* 文章精选推荐专栏 (SEO 核心与内部跳转) */
.articles-preview-section {
  padding: 90px 0 80px;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}

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

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.article-tag {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(192, 132, 252, 0.12);
  color: #e9d5ff;
  border: 1px solid rgba(192, 132, 252, 0.28);
}

.article-date {
  font-size: 12px;
  color: var(--text-dim);
}

.article-card-title {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-card-excerpt {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex: 1;
}

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

.article-card-footer span {
  transition: transform 0.2s ease;
}

.article-card:hover .article-card-footer span {
  transform: translateX(4px);
}

/* 用户真实评价与口碑 */
.reviews-section {
  padding: 80px 0;
  background: rgba(11, 19, 41, 0.35);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.15);
}

.review-stars {
  color: #f59e0b;
  font-size: 16px;
  margin-bottom: 14px;
}

.review-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 22px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f5d0fe 0%, #c084fc 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #070b14;
  font-size: 16px;
}

.review-author-info {
  flex: 1;
}

.review-author-name {
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
}

.review-author-role {
  font-size: 12px;
  color: var(--text-dim);
}

/* 常见问题 FAQ Section (纯原生展开折叠) */
.faq-section {
  padding: 90px 0 80px;
}

.faq-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(192, 132, 252, 0.4);
}

.faq-question {
  width: 100%;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition: color 0.2s ease;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  font-size: 20px;
  color: var(--primary);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 280px;
  padding: 0 24px 22px 24px;
}

/* 权威友链与生态外链 (帮我做好外链) */
.partners-section {
  padding: 60px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: rgba(8, 13, 26, 0.6);
}

.partners-title {
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 28px;
}

.partners-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
}

.partner-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
}

.partner-link:hover {
  background: rgba(192, 132, 252, 0.12);
  border-color: rgba(192, 132, 252, 0.35);
  color: var(--primary);
  transform: translateY(-2px);
}

/* 转化引导横幅 CTA Strip */
.cta-banner-section {
  padding: 80px 0;
}

.cta-banner-card {
  background: linear-gradient(135deg, rgba(30, 41, 79, 0.9) 0%, rgba(15, 23, 42, 0.95) 100%);
  border: 1px solid rgba(192, 132, 252, 0.35);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5), var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.cta-banner-card::before {
  content: "";
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 250px;
  background: radial-gradient(ellipse, rgba(192, 132, 252, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.cta-banner-title {
  font-size: clamp(24px, 3.5vw, 38px);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
}

.cta-banner-desc {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

/* 底部 Footer */
.site-footer {
  padding: 60px 0 30px;
  background: #05070e;
  border-top: 1px solid var(--border-color);
  font-size: 14px;
  color: var(--text-dim);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

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

.footer-col ul a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  transition: var(--transition);
}

.footer-col ul a:hover {
  color: var(--primary);
  padding-left: 3px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 12px;
}

.footer-legal-links {
  display: flex;
  gap: 20px;
}

.footer-legal-links a {
  color: var(--text-dim);
  text-decoration: none;
}

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

/* ==========================================================================
   响应式断点适配
   ========================================================================== */
@media (max-width: 1200px) {
  /* 当屏幕在 1200px 以下时，价格卡片支持流畅横向滑动展示，卡片宽度固定保持同排 */
  .pricing-grid {
    overflow-x: auto;
    padding-bottom: 16px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }
  .pricing-card {
    min-width: 250px;
    scroll-snap-align: start;
  }
  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: rgba(7, 11, 20, 0.98);
    border-bottom: 1px solid var(--border-color);
    padding: 24px;
  }
  .main-nav.open {
    display: block;
  }
  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .mobile-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .features-grid, .articles-grid, .reviews-grid, .nodes-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
}