/* ==========================================================================
   云翼网络 (yunyiwangluo.homes) - 官方极速落地页纯原生样式表
   零重型外部依赖 | 毫秒级秒开 | 视网膜高清自适应
   ========================================================================== */

:root {
  --bg-dark: #070B14;
  --bg-card: rgba(13, 21, 38, 0.72);
  --bg-card-hover: rgba(18, 30, 56, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-subtle: rgba(56, 189, 248, 0.12);
  --border-glow: rgba(0, 245, 255, 0.35);
  --border-active: rgba(99, 102, 241, 0.45);

  --primary-cyan: #00F5FF;
  --primary-sky: #38BDF8;
  --primary-blue: #0284C7;
  --primary-indigo: #6366F1;
  --accent-purple: #A855F7;
  --accent-emerald: #10B981;
  --accent-amber: #F59E0B;
  --accent-rose: #F43F5E;

  --text-main: #FFFFFF;
  --text-secondary: #E2E8F0;
  --text-muted: #94A3B8;
  --text-dim: #64748B;

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

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-glow: 0 0 25px rgba(0, 245, 255, 0.2);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  background-color: var(--bg-dark);
}

/* ================= 动态背景层 ================= */
.aurora-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  pointer-events: none;
}

.aurora-blob {
  position: absolute;
  filter: blur(110px);
  opacity: 0.18;
  border-radius: 50%;
  animation: auroraFloat 16s ease-in-out infinite alternate;
}

.aurora-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #00F5FF 0%, #0284C7 70%, transparent 100%);
  top: -150px;
  left: 10%;
  animation-duration: 18s;
}

.aurora-2 {
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, #6366F1 0%, #A855F7 70%, transparent 100%);
  top: 35%;
  right: -150px;
  animation-duration: 22s;
  animation-delay: -5s;
}

.aurora-3 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #0284C7 0%, #10B981 70%, transparent 100%);
  bottom: -100px;
  left: 20%;
  animation-duration: 20s;
  animation-delay: -10s;
}

@keyframes auroraFloat {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.12); }
  100% { transform: translate(-30px, -20px) scale(0.95); }
}

/* ================= 容器与版心 ================= */
.container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* ================= 顶部导航 Header ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 20, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

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

.brand-logo img {
  height: 48px;
  width: auto;
  display: block;
}

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

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover {
  color: var(--primary-cyan);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-cyan), var(--primary-indigo));
  transition: var(--transition);
  border-radius: 2px;
}

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

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

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

.btn-primary {
  background: linear-gradient(135deg, #00F5FF 0%, #0284C7 50%, #6366F1 100%);
  color: #050811;
  font-weight: 700;
  box-shadow: 0 4px 18px rgba(0, 245, 255, 0.32);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 245, 255, 0.5);
  color: #000;
}

.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.btn-outline:hover {
  background: rgba(56, 189, 248, 0.1);
  color: var(--primary-cyan);
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 34px;
  font-size: 1.08rem;
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 7px 16px;
  font-size: 0.86rem;
}

/* 移动端菜单按钮 */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ================= 英雄首屏 Hero Section ================= */
.hero-section {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  background: rgba(0, 245, 255, 0.08);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-full);
  color: var(--primary-cyan);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 24px;
  animation: pulseBadge 3s infinite;
}

@keyframes pulseBadge {
  0%, 100% { box-shadow: 0 0 10px rgba(0, 245, 255, 0.2); }
  50% { box-shadow: 0 0 20px rgba(0, 245, 255, 0.45); }
}

.hero-pill .pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--primary-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--primary-cyan);
}

.hero-title {
  font-size: clamp(2.1rem, 3.5vw, 3.1rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 22px;
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  text-wrap: balance;
}

.hero-nowrap {
  display: inline-block;
  white-space: nowrap;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #FFFFFF 20%, #38BDF8 60%, #00F5FF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 45px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
}

.stat-item {
  text-align: center;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 15%;
  right: 0;
  width: 1px;
  height: 70%;
  background: var(--border-subtle);
}

.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary-cyan);
  font-family: var(--font-mono);
  display: block;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ================= 核心优势 Features Section ================= */
.section {
  padding: 85px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 55px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--primary-cyan);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(14px);
}

.feature-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card), 0 0 20px rgba(0, 245, 255, 0.12);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary-cyan), transparent);
  opacity: 0;
  transition: var(--transition);
}

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

.feature-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(0, 245, 255, 0.08);
  border: 1px solid rgba(0, 245, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 22px;
  color: var(--primary-cyan);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.feature-text {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ================= 官方套餐价格方案 (所有价格严格同排) ================= */
.pricing-section {
  padding: 85px 0;
  background: linear-gradient(180deg, rgba(7, 11, 20, 0) 0%, rgba(13, 22, 42, 0.6) 50%, rgba(7, 11, 20, 0) 100%);
}

.pricing-notice {
  text-align: center;
  margin-bottom: 35px;
  font-size: 0.92rem;
  color: var(--primary-sky);
  background: rgba(56, 189, 248, 0.08);
  border: 1px dashed var(--border-subtle);
  display: inline-block;
  padding: 8px 24px;
  border-radius: var(--radius-full);
}

/* 核心要求：桌面端严格 5 列单排横向排列对齐 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(16px);
}

.pricing-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: 0 16px 36px -10px rgba(0, 0, 0, 0.6), 0 0 24px rgba(0, 245, 255, 0.18);
}

/* 人气推荐高亮卡片 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(14, 30, 60, 0.88) 0%, rgba(10, 18, 38, 0.92) 100%);
  border-color: var(--primary-cyan);
  box-shadow: 0 0 25px rgba(0, 245, 255, 0.22);
}

.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00F5FF, #6366F1);
  color: #050811;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.06em;
  white-space: nowrap;
  box-shadow: 0 3px 12px rgba(0, 245, 255, 0.4);
}

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

.plan-type {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary-cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  min-height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.plan-price-box {
  text-align: center;
  padding: 16px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 20px;
}

.price-currency {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-cyan);
  vertical-align: super;
}

.price-amount {
  font-size: 2.4rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: var(--text-main);
  letter-spacing: -0.03em;
}

.price-period {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.price-sub-note {
  font-size: 0.78rem;
  color: var(--accent-emerald);
  margin-top: 4px;
  font-weight: 600;
}

.plan-features {
  list-style: none;
  margin-bottom: 24px;
  flex-grow: 1;
}

.plan-features li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.45;
}

.feature-check {
  color: var(--primary-cyan);
  font-weight: bold;
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
}

/* ================= 节点架构与测速 Section ================= */
.nodes-section {
  padding: 85px 0;
}

.nodes-matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 45px;
}

.node-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: var(--transition);
}

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

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

.node-region {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.05rem;
}

.node-flag {
  font-size: 1.3rem;
}

.node-ping {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--accent-emerald);
  font-weight: 700;
  background: rgba(16, 185, 129, 0.1);
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

.node-details {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.node-tags {
  display: flex;
  gap: 6px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.node-tag-item {
  font-size: 0.74rem;
  background: rgba(56, 189, 248, 0.1);
  color: var(--primary-sky);
  padding: 2px 7px;
  border-radius: 4px;
}

/* ================= 知识库与深度文章推荐 (Articles Matrix) ================= */
.articles-section {
  padding: 85px 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  transition: var(--transition);
  backdrop-filter: blur(14px);
}

.article-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card), 0 0 20px rgba(0, 245, 255, 0.14);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.article-badge {
  color: var(--primary-cyan);
  background: rgba(0, 245, 255, 0.08);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.article-card-title {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 12px;
  transition: var(--transition);
}

.article-card:hover .article-card-title {
  color: var(--primary-cyan);
}

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--primary-sky);
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

.articles-more-wrap {
  text-align: center;
}

/* ================= 晚高峰测速仪表板 (Speed Dashboard & Table Card) ================= */
.speed-dashboard {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.speed-kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: 10px;
}

.speed-kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  backdrop-filter: blur(14px);
  transition: var(--transition);
}

.speed-kpi-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 245, 255, 0.12);
}

.speed-kpi-label {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.speed-kpi-value {
  font-size: 1.85rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: var(--primary-cyan);
  margin-bottom: 10px;
}

.speed-kpi-value .unit {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-left: 4px;
}

.speed-kpi-bar {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  overflow: hidden;
}

.speed-kpi-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-cyan), var(--primary-indigo));
  border-radius: 2px;
}

/* 独立高科技表格卡片样式 (Table Card Style) */
.speed-table-card {
  background: rgba(12, 19, 36, 0.88);
  border: 1px solid rgba(0, 245, 255, 0.28);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.7), 0 0 30px rgba(0, 245, 255, 0.1);
  overflow: hidden;
}

.speed-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(7, 12, 24, 0.95);
  border-bottom: 1px solid rgba(56, 189, 248, 0.2);
  flex-wrap: wrap;
  gap: 12px;
}

.speed-window-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}

.speed-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

.dot-red { background: #EF4444; box-shadow: 0 0 6px rgba(239, 68, 68, 0.6); }
.dot-yellow { background: #F59E0B; box-shadow: 0 0 6px rgba(245, 158, 11, 0.6); }
.dot-green { background: #10B981; box-shadow: 0 0 6px rgba(16, 185, 129, 0.6); }

.speed-card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.96rem;
  font-weight: 700;
  color: #FFFFFF;
}

.speed-pill-live {
  font-size: 0.76rem;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-full);
  padding: 3px 10px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.speed-pill-live::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent-emerald);
  border-radius: 50%;
  animation: pulseBadge 2s infinite;
}

/* 测速数据表格外壳与样式 */
.speed-table-wrap, .article-table-wrap {
  width: 100%;
  overflow-x: auto;
}

.speed-table, .article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
  text-align: left;
  min-width: 820px;
}

.speed-table th, .article-table th {
  background: rgba(0, 245, 255, 0.06);
  color: var(--primary-cyan);
  font-weight: 700;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 16px 22px;
  border-bottom: 1px solid rgba(56, 189, 248, 0.2);
}

.speed-table td, .article-table td {
  padding: 18px 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  vertical-align: middle;
}

.speed-table tbody tr:nth-child(even), .article-table tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.015);
}

.speed-table tbody tr:hover, .article-table tbody tr:hover {
  background: rgba(0, 245, 255, 0.05);
}

.speed-table tbody tr:last-child td, .article-table tbody tr:last-child td {
  border-bottom: none;
}

.speed-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(7, 12, 24, 0.95);
  border-top: 1px solid rgba(56, 189, 248, 0.18);
  flex-wrap: wrap;
  gap: 14px;
}

.speed-footer-note {
  font-size: 0.86rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.speed-node-title {
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.speed-isp-badge {
  font-size: 0.82rem;
  color: var(--primary-sky);
  background: rgba(56, 189, 248, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
}

.speed-ping-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.86rem;
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.12);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.speed-ping-dot {
  width: 6px;
  height: 6px;
  background: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--accent-emerald);
}

.speed-rate-down {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary-cyan);
}

.speed-rate-up {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--text-muted);
}

.speed-buffer-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 600;
  color: #38BDF8;
  background: rgba(56, 189, 248, 0.1);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

/* ================= 客户端全平台支持 ================= */
.clients-section {
  padding: 70px 0;
  background: rgba(13, 21, 38, 0.4);
}

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

.client-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: var(--transition);
}

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

.client-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
  display: inline-block;
}

.client-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.client-apps {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* ================= 用户真实评价 ================= */
.reviews-section {
  padding: 85px 0;
}

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(14px);
  transition: var(--transition);
}

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

.review-stars {
  color: #FBBF24;
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.review-comment {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-cyan), var(--primary-indigo));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #050811;
  font-size: 1.1rem;
}

.user-info h4 {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-main);
}

.user-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ================= 常见问题 FAQ ================= */
.faq-section {
  padding: 85px 0;
}

.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-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item[open] {
  border-color: var(--border-glow);
  box-shadow: 0 4px 20px rgba(0, 245, 255, 0.1);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  list-style: none;
}

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

.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--primary-cyan);
  transition: var(--transition);
}

.faq-item[open] .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-answer strong {
  color: var(--text-secondary);
}

/* ================= 权威生态与官方外链 Section ================= */
.ecosystem-section {
  padding: 70px 0;
  background: rgba(13, 21, 38, 0.5);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

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

.ecosystem-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-secondary);
  transition: var(--transition);
}

.ecosystem-link:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
  color: var(--primary-cyan);
}

.eco-icon {
  font-size: 1.5rem;
}

.eco-title {
  font-size: 0.94rem;
  font-weight: 700;
  display: block;
}

.eco-desc {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ================= 底部终极转化横幅 CTA Banner ================= */
.cta-banner-section {
  padding: 80px 0;
}

.cta-banner-box {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.25) 0%, rgba(99, 102, 241, 0.25) 100%), var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 245, 255, 0.15);
}

.cta-banner-box h2 {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 18px;
}

.cta-banner-box p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 32px;
}

/* ================= 页脚 Footer ================= */
.site-footer {
  background: #04070D;
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 30px;
  position: relative;
  z-index: 2;
}

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

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 16px;
  max-width: 320px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
  letter-spacing: 0.05em;
}

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

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary-cyan);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.84rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 15px;
}

/* ================= 移动端适配与自适应 ================= */
@media (max-width: 1200px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .nodes-matrix, .clients-grid, .ecosystem-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  .hero-title {
    font-size: 2.6rem;
  }
  .features-grid, .articles-grid, .reviews-grid, .speed-kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
  }
  .stat-item:not(:last-child)::after {
    display: none;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .nav-menu {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
}

@media (max-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .features-grid, .articles-grid, .reviews-grid, .nodes-matrix, .clients-grid, .ecosystem-grid, .speed-kpi-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .hero-desc {
    font-size: 1rem;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr;
  }
  .cta-banner-box {
    padding: 40px 20px;
  }
  .cta-banner-box h2 {
    font-size: 1.85rem;
  }
}