/* ==========================================================================
   LinkCube (linkcube.surf) - 官方原生样式系统
   纯原生 CSS3 编写，无第三方框架，追求秒开加载与高刷新渲染体验
   ========================================================================== */

:root {
  /* 品牌色彩系统：赛博深空与极速翠绿/霓虹青 */
  --bg-deep: #050a12;
  --bg-dark: #0a1120;
  --bg-card: rgba(14, 23, 42, 0.75);
  --bg-card-hover: rgba(20, 32, 58, 0.88);
  --bg-card-featured: linear-gradient(180deg, rgba(16, 185, 129, 0.12) 0%, rgba(6, 182, 212, 0.08) 100%);
  --bg-glass: rgba(15, 23, 42, 0.65);
  
  --primary: #10b981;
  --primary-light: #34d399;
  --primary-glow: rgba(16, 185, 129, 0.35);
  --cyan: #06b6d4;
  --cyan-light: #22d3ee;
  --cyan-glow: rgba(6, 182, 212, 0.35);
  --blue: #3b82f6;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-inverse: #030712;

  --border-light: rgba(148, 163, 184, 0.14);
  --border-glow: rgba(16, 185, 129, 0.4);
  --border-featured: rgba(6, 182, 212, 0.5);

  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(16, 185, 129, 0.25);
  --shadow-btn: 0 8px 24px -6px rgba(16, 185, 129, 0.45);

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", Consolas, Monaco, "Courier New", monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-deep);
  color: var(--text-main);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 动态背景画布 */
#cyber-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  opacity: 0.85;
}

/* 页面氛围光晕图层 */
.ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  pointer-events: none;
  background: 
    radial-gradient(circle at 15% 20%, rgba(16, 185, 129, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 60%, rgba(6, 182, 212, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 50% 90%, rgba(59, 130, 246, 0.08) 0%, transparent 55%);
}

/* 容器布局 */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 链接基础 */
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  color: #041017;
  box-shadow: var(--shadow-btn);
  font-weight: 700;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -4px rgba(16, 185, 129, 0.6);
  filter: brightness(1.08);
}

.btn-outline {
  background: rgba(148, 163, 184, 0.07);
  border-color: rgba(148, 163, 184, 0.25);
  color: var(--text-main);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: rgba(16, 185, 129, 0.12);
  border-color: var(--primary);
  color: var(--primary-light);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 15px 34px;
  font-size: 16.5px;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 13.5px;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   导航头部 (Header & Navbar)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(6, 11, 20, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo img {
  height: 44px;
  width: auto;
  display: block;
}

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

.nav-link {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-muted);
}

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

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 24px;
  cursor: pointer;
}

/* ==========================================================================
   Hero 首屏视觉区
   ========================================================================== */
.hero-section {
  padding: 90px 0 65px;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  font-size: 13.5px;
  color: var(--primary-light);
  margin-bottom: 24px;
  font-weight: 600;
}

.hero-pill .dot {
  width: 8px;
  height: 8px;
  background-color: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.hero-title {
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
  background: linear-gradient(135deg, #ffffff 30%, #94a3b8 70%, #34d399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title .gradient-text {
  display: block;
  font-size: clamp(18px, 2.35vw, 29px);
  font-weight: 800;
  margin-top: 10px;
  white-space: nowrap;
  background: linear-gradient(135deg, #34d399 0%, #22d3ee 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title .phrase {
  display: inline;
}

.hero-desc {
  max-width: 800px;
  margin: 0 auto 36px;
  font-size: 17.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 52px;
  flex-wrap: wrap;
}

/* 运行状态指标栏 */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  border-right: 1px solid var(--border-light);
}

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

.metric-val {
  font-size: 28px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--primary-light);
}

.metric-label {
  font-size: 13px;
  color: var(--text-muted);
}

/* ==========================================================================
   通用板块标题
   ========================================================================== */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 52px;
}

.section-pill {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--cyan-light);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  color: #ffffff;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
}

/* ==========================================================================
   套餐价格区域 (Pricing) - 核心规范：所有价格严格同排展示
   ========================================================================== */
.pricing-section {
  padding: 90px 0;
  position: relative;
}

.pricing-notice {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 30px;
  padding: 10px 20px;
  background: rgba(6, 182, 212, 0.08);
  border: 1px dashed rgba(6, 182, 212, 0.35);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--cyan-light);
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

/* 计费周期切换栏 */
.pricing-cycle-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 40px;
}

.cycle-switcher {
  display: inline-flex;
  padding: 5px;
  background: rgba(14, 23, 42, 0.9);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
}

.cycle-btn {
  padding: 8px 22px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.cycle-btn.active {
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  color: #041017;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
}

.badge-discount {
  position: absolute;
  top: -12px;
  right: -8px;
  background: #ef4444;
  color: #fff;
  font-size: 10.5px;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.5);
}

/* 核心：4 大套餐严格同排展示 (Desktop 4-Columns Grid, 同一水平基准线) */
.pricing-grid-same-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.price-card {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

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

.price-card.featured {
  background: var(--bg-card-featured);
  border: 1.5px solid var(--border-featured);
  box-shadow: 0 14px 40px -10px rgba(6, 182, 212, 0.35);
  transform: scale(1.02);
}

.price-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
  box-shadow: 0 18px 48px rgba(6, 182, 212, 0.5);
}

.featured-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #06b6d4 0%, #10b981 100%);
  color: #041017;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.5px;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.45);
  white-space: nowrap;
}

.plan-header {
  margin-bottom: 18px;
}

.plan-name {
  font-size: 21px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 13px;
  color: var(--text-muted);
  min-height: 38px;
  line-height: 1.45;
}

.price-amount-box {
  margin: 16px 0;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-light);
}

.price-main {
  display: flex;
  align-items: baseline;
  gap: 3px;
}

.price-currency {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary-light);
}

.price-number {
  font-size: 44px;
  font-weight: 900;
  color: var(--text-main);
  font-family: var(--font-mono);
  letter-spacing: -0.03em;
}

.price-cycle {
  font-size: 14px;
  color: var(--text-muted);
  margin-left: 2px;
}

.price-equivalent {
  font-size: 12px;
  color: var(--cyan-light);
  margin-top: 4px;
  font-weight: 600;
}

.plan-features {
  list-style: none;
  margin-bottom: 26px;
  flex-grow: 1;
}

.plan-features li {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 9px;
  line-height: 1.4;
}

.plan-features li strong {
  color: var(--text-main);
}

.feature-check {
  color: var(--primary-light);
  flex-shrink: 0;
  margin-top: 2px;
}

.plan-action {
  margin-top: auto;
}

.price-footnote {
  text-align: center;
  font-size: 11.5px;
  color: var(--text-dim);
  margin-top: 10px;
}

/* ==========================================================================
   核心优势 (Features Grid)
   ========================================================================== */
.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(12px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  transition: var(--transition);
}

.feature-box:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card);
}

.feature-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-light);
  margin-bottom: 20px;
}

.feature-title {
  font-size: 19px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   全球节点网络与延迟监控 (Global Nodes Network)
   ========================================================================== */
.nodes-section {
  padding: 80px 0;
  position: relative;
}

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

.node-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
}

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

.node-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.node-flag {
  font-size: 24px;
}

.node-name {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-main);
}

.node-tag {
  font-size: 11.5px;
  color: var(--text-dim);
}

.node-ping {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--primary-light);
}

.node-ping .ping-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
}

/* ==========================================================================
   客户端支持与官方外链 (Clients Section)
   ========================================================================== */
.clients-section {
  padding: 80px 0;
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}

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

.client-icon {
  width: 50px;
  height: 50px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(6, 182, 212, 0.1);
  color: var(--cyan-light);
}

.client-title {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.client-os {
  font-size: 12.5px;
  color: var(--primary-light);
  font-weight: 600;
  margin-bottom: 12px;
}

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

.client-link {
  font-size: 13px;
  color: var(--cyan-light);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
}

.client-link:hover {
  color: #ffffff;
  text-decoration: underline;
}

/* ==========================================================================
   知识库 / 机场精选专栏 (Articles Section)
   ========================================================================== */
.articles-section {
  padding: 80px 0;
}

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

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

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

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12.5px;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.article-tag {
  background: rgba(16, 185, 129, 0.12);
  color: var(--primary-light);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 11.5px;
}

.article-title {
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: #ffffff;
}

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

.article-summary {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  color: var(--primary-light);
  font-weight: 600;
}

.article-more:hover {
  gap: 9px;
  color: #ffffff;
}

/* ==========================================================================
   用户真实评价 (Testimonials Section)
   ========================================================================== */
.testimonials-section {
  padding: 80px 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stars {
  color: #fbbf24;
  margin-bottom: 14px;
  font-size: 14px;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #041017;
  font-size: 15px;
}

.user-info .user-name {
  font-size: 14.5px;
  font-weight: 700;
  color: #fff;
}

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

/* ==========================================================================
   常见问题 FAQ (Accordion FAQ)
   ========================================================================== */
.faq-section {
  padding: 80px 0 100px;
}

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

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

.faq-item:hover {
  border-color: rgba(16, 185, 129, 0.35);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 16.5px;
  font-weight: 700;
  cursor: pointer;
}

.faq-icon {
  font-size: 20px;
  color: var(--primary-light);
  transition: transform 0.28s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.35s ease-out;
  padding: 0 24px;
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 22px;
}

/* ==========================================================================
   底栏与 CTA 行动呼吁
   ========================================================================== */
.cta-banner-section {
  padding: 70px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(16, 185, 129, 0.08) 100%);
  text-align: center;
}

.cta-banner-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(6, 182, 212, 0.15) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 50px 30px;
  max-width: 960px;
  margin: 0 auto;
  box-shadow: var(--shadow-glow);
}

.cta-banner-title {
  font-size: 32px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
}

.cta-banner-desc {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 30px;
}

/* 页脚 */
.site-footer {
  background: #03070d;
  border-top: 1px solid var(--border-light);
  padding: 60px 0 30px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 13.5px;
  color: var(--text-dim);
  margin-top: 14px;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  color: #ffffff;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 13.5px;
  color: var(--text-muted);
}

.footer-col ul li a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  border-top: 1px solid rgba(148, 163, 184, 0.08);
  font-size: 12.5px;
  color: var(--text-dim);
}

/* ==========================================================================
   响应式断点 (严格保证桌面端 100% 同排展示)
   ========================================================================== */
@media (max-width: 1100px) {
  .pricing-grid-same-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
  }
  .nodes-grid, .clients-grid, .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid, .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title .gradient-text {
    white-space: normal;
    font-size: 19px;
    line-height: 1.45;
  }
  .hero-title .phrase {
    display: inline-block;
  }
  .nav-menu {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .pricing-grid-same-row {
    grid-template-columns: 1fr;
  }
  .hero-metrics {
    grid-template-columns: 1fr 1fr;
  }
  .features-grid, .nodes-grid, .clients-grid, .articles-grid, .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}


/* ==========================================================================
   冬日雪人与互动丢雪球专属样式
   ========================================================================== */
.snow-interactive-pill {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: rgba(14, 23, 42, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1.5px solid rgba(34, 211, 238, 0.45);
  border-radius: var(--radius-full);
  color: #f8fafc;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 8px 24px -4px rgba(6, 182, 212, 0.35);
  transition: var(--transition);
  user-select: none;
}

.snow-interactive-pill:hover {
  transform: translateY(-3px) scale(1.02);
  border-color: var(--primary-light);
  box-shadow: 0 12px 28px rgba(16, 185, 129, 0.45);
  background: rgba(20, 32, 58, 0.95);
}

.snow-interactive-pill .snow-icon {
  font-size: 17px;
  display: inline-block;
  animation: snowIconWiggle 2s ease-in-out infinite;
}

.snow-interactive-pill .hit-badge {
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  color: #041017;
  padding: 2px 9px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 800;
  font-family: var(--font-mono);
}

@keyframes snowIconWiggle {
  0%, 100% { transform: rotate(0deg) scale(1); }
  25% { transform: rotate(-10deg) scale(1.1); }
  75% { transform: rotate(10deg) scale(1.1); }
}

@media (max-width: 768px) {
  .snow-interactive-pill {
    right: 14px;
    bottom: 14px;
    padding: 8px 14px;
    font-size: 12.5px;
  }
}