/* ===================================================================
   二猫云官网 (ermaocloud.homes) - 全局核心视觉样式表
   主题：深空赛博猫咪科技风 (Deep Space Neon Cat Cloud)
   主色调：星云紫 #8b5cf6 / 极光青 #06b6d4 / 琥珀猫金 #f59e0b / 深曜黑 #090b16
   =================================================================== */

:root {
  --bg-primary: #080a14;
  --bg-secondary: #0e1224;
  --bg-card: rgba(18, 23, 46, 0.72);
  --bg-card-hover: rgba(28, 35, 68, 0.88);
  --border-color: rgba(139, 92, 246, 0.22);
  --border-glow: rgba(168, 85, 247, 0.55);

  --accent-purple: #8b5cf6;
  --accent-purple-light: #a78bfa;
  --accent-violet: #6366f1;
  --accent-cyan: #06b6d4;
  --accent-amber: #f59e0b;
  --accent-pink: #ec4899;
  --accent-green: #10b981;
  --accent-red: #ef4444;

  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition-normal: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-glow: 0 0 35px rgba(139, 92, 246, 0.25);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;
  --container-max: 1240px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: dark;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 背景动态粒子与氛围灯光 */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  pointer-events: none;
}

.ambient-glow {
  position: fixed;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  z-index: -1;
  pointer-events: none;
  opacity: 0.35;
  animation: floatGlow 14s ease-in-out infinite alternate;
}

.glow-purple {
  top: 5%;
  right: 10%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.6) 0%, transparent 70%);
}

.glow-cyan {
  top: 45%;
  left: 5%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.45) 0%, transparent 70%);
  animation-duration: 18s;
  animation-delay: -5s;
}

.glow-amber {
  bottom: 10%;
  right: 15%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.35) 0%, transparent 70%);
  animation-duration: 20s;
  animation-delay: -9s;
}

@keyframes floatGlow {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, 40px) scale(1.15); }
  100% { transform: translate(40px, -20px) scale(0.9); }
}

/* 容器定义 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* 链接与排版基本规则 */
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-normal);
}

img, svg {
  vertical-align: middle;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: var(--radius-full);
  padding: 12px 28px;
  font-size: 15px;
  cursor: pointer;
  transition: var(--transition-normal);
  border: 1px solid transparent;
  outline: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #a855f7 0%, #6366f1 100%);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(168, 85, 247, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(168, 85, 247, 0.65);
  filter: brightness(1.12);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-purple-light);
  transform: translateY(-2px);
}

.btn-outline-amber {
  background: rgba(245, 158, 11, 0.1);
  color: #fde68a;
  border: 1px solid rgba(245, 158, 11, 0.4);
}

.btn-outline-amber:hover {
  background: rgba(245, 158, 11, 0.25);
  border-color: var(--accent-amber);
  transform: translateY(-2px);
  color: #fff;
}

.btn-sm {
  padding: 7px 18px;
  font-size: 13.5px;
}

.btn-lg {
  padding: 15px 36px;
  font-size: 17px;
}

/* 顶部导航栏 */
.header-nav {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(8, 10, 20, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-normal);
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.3px;
}

.nav-brand-logo {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #c084fc, #6366f1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(168, 85, 247, 0.5);
  position: relative;
}

.nav-brand-logo svg {
  width: 24px;
  height: 24px;
  fill: #ffffff;
}

.nav-brand-text span {
  background: linear-gradient(135deg, #f59e0b, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-left: 4px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-menu li a {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 2px;
}

.nav-menu li a:hover,
.nav-menu li a.active {
  color: #ffffff;
}

.nav-menu li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-menu li a:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
}

/* 通用板块标题 */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-purple-light);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.25;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.section-title .gradient-text {
  background: linear-gradient(135deg, #c084fc 0%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ================== Hero 区域 ================== */
.hero-section {
  padding: 120px 0 90px;
  position: relative;
  overflow: hidden;
}

.hero-wrapper {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 50px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: #fbbf24;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 22px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background-color: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10b981;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
  font-size: 48px;
  font-weight: 850;
  line-height: 1.18;
  letter-spacing: -1px;
  color: #ffffff;
  margin-bottom: 22px;
}

.hero-title-highlight {
  background: linear-gradient(135deg, #c084fc 0%, #f472b6 50%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 36px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-features-list {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  list-style: none;
}

.hero-features-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
}

.hero-features-list li svg {
  color: var(--accent-green);
  flex-shrink: 0;
}

/* Hero 右侧视觉模拟台 */
.hero-visual {
  position: relative;
}

.cyber-cat-card {
  background: linear-gradient(145deg, rgba(25, 30, 60, 0.85), rgba(12, 15, 32, 0.95));
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 40px rgba(139, 92, 246, 0.2);
  position: relative;
  overflow: hidden;
}

.cyber-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 18px;
  margin-bottom: 22px;
}

.window-dots {
  display: flex;
  gap: 6px;
}

.window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.window-dots span:nth-child(1) { background: #ef4444; }
.window-dots span:nth-child(2) { background: #f59e0b; }
.window-dots span:nth-child(3) { background: #10b981; }

.status-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.cat-speed-meter {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.meter-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.meter-num {
  font-size: 26px;
  font-weight: 800;
  color: #ffffff;
  display: block;
  font-family: monospace;
}

.meter-num.cyan { color: var(--accent-cyan); }
.meter-num.purple { color: #c084fc; }

.meter-label {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 4px;
  display: block;
}

.cat-console-log {
  background: rgba(0, 0, 0, 0.45);
  border-radius: var(--radius-sm);
  padding: 14px;
  font-family: Consolas, Monaco, "Courier New", monospace;
  font-size: 12.5px;
  color: #93c5fd;
  border-left: 3px solid var(--accent-purple);
  line-height: 1.7;
}

.log-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.log-green { color: #34d399; }
.log-amber { color: #fbbf24; }

/* 飘动装饰贴纸 */
.floating-tag {
  position: absolute;
  background: rgba(15, 20, 42, 0.9);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-glow);
  padding: 10px 18px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  animation: floatTag 6s ease-in-out infinite alternate;
}

.tag-1 {
  top: -15px;
  right: -10px;
  color: #fde047;
}

.tag-2 {
  bottom: -20px;
  left: -15px;
  color: #67e8f9;
  animation-delay: -3s;
}

@keyframes floatTag {
  0% { transform: translateY(0); }
  100% { transform: translateY(-12px); }
}

/* ================== 核心优势板块 ================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-purple), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

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

.feature-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.18), rgba(99, 102, 241, 0.08));
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: var(--accent-purple-light);
  font-size: 24px;
}

.feature-title {
  font-size: 19px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

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

/* ================== 节点延迟与状态板块 ================== */
.nodes-monitor-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.nodes-monitor-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 20px;
  margin-bottom: 24px;
}

.monitor-stats-group {
  display: flex;
  gap: 24px;
}

.monitor-stat-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
}

.monitor-stat-item strong {
  color: #ffffff;
  font-weight: 700;
}

.monitor-refresh-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-normal);
}

.monitor-refresh-btn:hover {
  color: #fff;
  border-color: var(--accent-purple);
  background: rgba(139, 92, 246, 0.15);
}

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

.node-card {
  background: rgba(10, 14, 28, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: var(--transition-normal);
  position: relative;
}

.node-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-3px);
  background: rgba(15, 22, 45, 0.85);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.15);
}

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

.node-country {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  color: #ffffff;
}

.country-flag {
  font-size: 18px;
}

.node-type-tag {
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(139, 92, 246, 0.2);
  color: #c084fc;
  font-weight: 600;
}

.node-body {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 10px;
}

.node-ping {
  font-family: monospace;
  font-size: 20px;
  font-weight: 800;
  color: #34d399;
}

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

.node-load-bar {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 8px;
}

.node-load-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #06b6d4);
  border-radius: 3px;
  transition: width 0.6s ease;
}

.node-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  color: var(--text-dim);
}

.status-online {
  display: flex;
  align-items: center;
  gap: 5px;
  color: #34d399;
}

.status-online::before {
  content: '';
  width: 6px;
  height: 6px;
  background-color: #34d399;
  border-radius: 50%;
  box-shadow: 0 0 6px #34d399;
}

/* ================== 套餐价格板块 ================== */
.pricing-switch-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 46px;
}

.pricing-switch {
  display: inline-flex;
  padding: 5px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
}

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

.pricing-tab-btn.active {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-violet));
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.35);
}

.discount-badge {
  background: linear-gradient(135deg, #f59e0b, #ec4899);
  color: #ffffff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-left: 6px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 34px 26px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
  position: relative;
  backdrop-filter: blur(12px);
}

.pricing-card.popular {
  border-color: var(--border-glow);
  background: linear-gradient(175deg, rgba(30, 27, 65, 0.85) 0%, rgba(14, 18, 38, 0.95) 100%);
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(139, 92, 246, 0.25);
}

.popular-ribbon {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #f59e0b, #ec4899);
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
  letter-spacing: 0.5px;
}

.pricing-card:hover {
  transform: translateY(-10px);
  border-color: var(--accent-purple-light);
  box-shadow: var(--shadow-glow);
}

.pricing-name {
  font-size: 20px;
  font-weight: 750;
  color: #ffffff;
  margin-bottom: 6px;
}

.pricing-desc {
  font-size: 13.5px;
  color: var(--text-dim);
  margin-bottom: 22px;
  min-height: 40px;
}

.pricing-price-box {
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 20px;
  font-weight: 600;
  color: var(--accent-purple-light);
}

.price-amount {
  font-size: 40px;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
}

.price-cycle {
  font-size: 13px;
  color: var(--text-dim);
}

.pricing-divider {
  width: 100%;
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  margin-bottom: 22px;
}

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-bottom: 30px;
  flex-grow: 1;
}

.pricing-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  color: var(--text-muted);
}

.pricing-features-list li svg {
  color: var(--accent-purple-light);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-features-list li strong {
  color: #ffffff;
}

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

/* ================== 用户评价板块 ================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  backdrop-filter: blur(12px);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.review-stars {
  display: flex;
  gap: 4px;
  color: #fbbf24;
  margin-bottom: 16px;
  font-size: 15px;
}

.review-content {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 22px;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 16px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 16px;
  box-shadow: 0 0 12px rgba(139, 92, 246, 0.4);
}

.author-info h4 {
  font-size: 15px;
  color: #ffffff;
  font-weight: 600;
}

.author-info p {
  font-size: 12.5px;
  color: var(--text-dim);
}

/* ================== 常见问题 FAQ 板块 ================== */
.faq-container {
  max-width: 840px;
  margin: 0 auto;
}

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

.faq-item:hover {
  border-color: rgba(168, 85, 247, 0.4);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-icon {
  width: 22px;
  height: 22px;
  transition: transform 0.3s ease;
  color: var(--accent-purple-light);
  flex-shrink: 0;
}

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

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

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

/* ================== 知识库与教程板块 ================== */
.knowledge-section {
  background: linear-gradient(180deg, transparent 0%, rgba(14, 18, 38, 0.6) 100%);
}

.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-color);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  position: relative;
}

.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;
  justify-content: space-between;
  margin-bottom: 14px;
}

.article-category {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(139, 92, 246, 0.15);
  color: #c084fc;
  font-weight: 600;
}

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

.article-title {
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.45;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card:hover .article-title {
  color: var(--accent-purple-light);
}

.article-excerpt {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-cyan);
}

.article-footer span {
  display: flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease;
}

.article-card:hover .article-footer span {
  gap: 8px;
}

/* ================== CTA 转化条 ================== */
.cta-banner-section {
  padding: 60px 0 100px;
}

.cta-banner-box {
  background: linear-gradient(135deg, rgba(88, 28, 135, 0.5) 0%, rgba(30, 27, 75, 0.8) 50%, rgba(14, 116, 144, 0.4) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 50px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.7);
}

.cta-banner-box::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.cta-title {
  font-size: 34px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 16px;
  color: #e2e8f0;
  max-width: 620px;
  margin: 0 auto 30px;
}

.cta-btn-wrap {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ================== 页脚 FOOTER ================== */
.footer {
  background: #05070e;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 70px 0 30px;
  color: var(--text-dim);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand h3 {
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

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

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

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

.footer-links li a:hover {
  color: #ffffff;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
}

/* ================== 文章详情页专属排版 ================== */
.article-page-body {
  padding: 60px 0 100px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text-dim);
  margin-bottom: 28px;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--accent-purple-light);
}

.article-layout {
  display: grid;
  grid-template-columns: 2.8fr 1.2fr;
  gap: 40px;
  align-items: start;
}

.article-content-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 42px 38px;
  backdrop-filter: blur(12px);
}

.article-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 24px;
  margin-bottom: 30px;
}

.article-main-title {
  font-size: 32px;
  font-weight: 850;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 16px;
}

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

.article-body h2 {
  font-size: 24px;
  font-weight: 750;
  color: #ffffff;
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(139, 92, 246, 0.2);
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: #e2e8f0;
  margin: 26px 0 12px;
}

.article-body p {
  font-size: 15.5px;
  line-height: 1.8;
  color: #cbd5e1;
  margin-bottom: 18px;
}

.article-body ul, .article-body ol {
  margin: 16px 0 22px 24px;
  color: #cbd5e1;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.article-body blockquote {
  border-left: 4px solid var(--accent-purple);
  background: rgba(139, 92, 246, 0.08);
  padding: 14px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 22px 0;
  color: #e2e8f0;
  font-size: 14.5px;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 26px 0;
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.article-body th, .article-body td {
  padding: 12px 16px;
  text-align: left;
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 14px;
}

.article-body th {
  background: rgba(139, 92, 246, 0.15);
  color: #ffffff;
  font-weight: 600;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 90px;
}

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(12px);
}

.sidebar-widget h4 {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-articles-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-articles-list li a {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.5;
  display: block;
}

.sidebar-articles-list li a:hover {
  color: var(--accent-purple-light);
}

.sidebar-cta-card {
  background: linear-gradient(145deg, rgba(88, 28, 135, 0.4), rgba(15, 23, 42, 0.8));
  border: 1px solid var(--border-glow);
  text-align: center;
}

/* ================== 响应式适配 ================== */
@media (max-width: 1024px) {
  .hero-wrapper {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .hero-features-list {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(8, 10, 20, 0.98);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
  }
  .nav-menu.open {
    transform: translateY(0);
  }
  .mobile-toggle {
    display: block;
  }
  .hero-title {
    font-size: 34px;
  }
  .section-title {
    font-size: 28px;
  }
  .features-grid,
  .nodes-grid,
  .pricing-grid,
  .reviews-grid,
  .articles-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .article-content-container {
    padding: 26px 18px;
  }
}