/* ==========================================================================
   一云梯 (YiYunTi VPN) - 赛博荧蓝 极简高性能样式表
   Domain: yiyuntivpn.lol
   ========================================================================== */

:root {
  --bg-primary: #060911;
  --bg-secondary: #0b1120;
  --bg-card: rgba(14, 23, 42, 0.75);
  --bg-card-hover: rgba(20, 33, 61, 0.85);
  
  --neon-cyan: #00f0ff;
  --neon-cyan-glow: rgba(0, 240, 255, 0.45);
  --neon-blue: #0084ff;
  --neon-blue-glow: rgba(0, 132, 255, 0.4);
  --neon-electric: #38bdf8;
  --neon-purple-accent: #6366f1;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --border-subtle: rgba(56, 189, 248, 0.15);
  --border-glow: rgba(0, 240, 255, 0.45);

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

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background: 
    radial-gradient(circle at 50% -20%, rgba(0, 240, 255, 0.12), transparent 45%),
    radial-gradient(circle at 85% 35%, rgba(0, 132, 255, 0.08), transparent 40%),
    radial-gradient(circle at 15% 75%, rgba(99, 102, 241, 0.07), transparent 45%),
    linear-gradient(180deg, #060911 0%, #080d19 100%);
  background-attachment: fixed;
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

/* 赛博网格背景微光装饰 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(0, 240, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all var(--transition-fast);
}

img, svg {
  vertical-align: middle;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   导航条 Navbar
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(6, 9, 17, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

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

/* 点击可回到顶部 */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
  transition: transform var(--transition-fast);
}

.brand-logo:hover {
  transform: translateY(-1px);
}

.brand-logo:active {
  transform: scale(0.97);
}

.logo-icon-box {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(0, 132, 255, 0.15));
  border: 1px solid var(--neon-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px var(--neon-cyan-glow);
  position: relative;
  overflow: hidden;
}

.logo-icon-box svg {
  width: 24px;
  height: 24px;
  color: var(--neon-cyan);
  filter: drop-shadow(0 0 6px var(--neon-cyan));
}

.brand-names {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, #ffffff 0%, var(--neon-cyan) 60%, var(--neon-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--neon-electric);
  text-transform: uppercase;
}

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

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

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--neon-cyan);
  box-shadow: 0 0 8px var(--neon-cyan);
  transition: width var(--transition-fast);
}

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

.nav-action {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* ==========================================================================
   按钮系统 (CTA Buttons - 全部必须为 target="_blank" dofollow)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1rem;
  padding: 13px 28px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, #00f0ff 0%, #0084ff 100%);
  color: #060911;
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 0 24px var(--neon-cyan-glow), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  font-weight: 700;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #38f4ff 0%, #1a94ff 100%);
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(0, 240, 255, 0.65), 0 8px 24px rgba(0, 132, 255, 0.4);
  color: #04070d;
}

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

.btn-secondary {
  background: rgba(14, 23, 42, 0.7);
  color: var(--neon-cyan);
  border: 1px solid var(--neon-cyan);
  backdrop-filter: blur(8px);
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(0, 240, 255, 0.12);
  border-color: #38f4ff;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.35);
}

.btn-accent {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.18), rgba(0, 132, 255, 0.22));
  color: #38f4ff;
  border: 1px solid var(--neon-cyan);
  backdrop-filter: blur(8px);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.28);
}

.btn-accent:hover {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.32), rgba(0, 132, 255, 0.36));
  color: #ffffff;
  border-color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(0, 240, 255, 0.6), 0 0 16px rgba(0, 132, 255, 0.4);
}

.btn-sm {
  padding: 9px 20px;
  font-size: 0.9rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

/* ==========================================================================
   页面区块与排版 Section Layouts
   ========================================================================== */
.section {
  padding: 100px 0;
  position: relative;
}

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

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid var(--border-subtle);
  color: var(--neon-cyan);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 8px var(--neon-cyan);
}

.section-title {
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.25;
  margin-bottom: 16px;
}

.text-gradient-cyan {
  background: linear-gradient(90deg, #ffffff 10%, var(--neon-cyan) 65%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   1. 主视觉区 Hero Section (双栏交互排版 + 动态赛博终端图卡)
   ========================================================================== */
.hero-section {
  padding-top: 140px;
  padding-bottom: 90px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero-left {
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.35);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.18);
  margin-bottom: 24px;
  animation: pulseGlow 3s infinite ease-in-out;
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 15px rgba(0, 240, 255, 0.15); border-color: rgba(0, 240, 255, 0.25); }
  50% { box-shadow: 0 0 32px rgba(0, 240, 255, 0.45); border-color: rgba(0, 240, 255, 0.7); }
}

.hero-badge-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 12px var(--neon-cyan);
  animation: blinkDot 1.4s infinite ease-in-out;
}

@keyframes blinkDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.75); }
}

.hero-badge-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: #e0f2fe;
  letter-spacing: 0.3px;
}

.hero-badge-text strong {
  color: var(--neon-cyan);
}

.hero-title {
  font-size: 3.3rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -1px;
  margin-bottom: 22px;
}

.brand-highlight {
  display: inline-block;
  color: #ffffff;
  position: relative;
  text-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
}

.brand-highlight::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-blue));
  border-radius: 3px;
  opacity: 0.75;
  filter: blur(2px);
  z-index: -1;
}

.hero-subtitle {
  font-size: 1.12rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.75;
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

/* 核心运行数据展示 */
.hero-stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 20px 22px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -8px;
  top: 15%;
  height: 70%;
  width: 1px;
  background: rgba(255, 255, 255, 0.08);
}

/* --------------------------------------------------------------------------
   主视觉区右侧：动态赛博终端图卡 (Dynamic Cyber Terminal Card)
   -------------------------------------------------------------------------- */
.hero-right {
  display: flex;
  justify-content: center;
  position: relative;
}

.hero-right::before {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.22) 0%, rgba(0, 132, 255, 0.08) 50%, transparent 70%);
  filter: blur(40px);
  z-index: 0;
  pointer-events: none;
  animation: floatOrb 6s ease-in-out infinite alternate;
}

@keyframes floatOrb {
  0% { transform: translate(-20px, -20px) scale(0.95); }
  100% { transform: translate(25px, 20px) scale(1.08); }
}

.cyber-terminal-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 480px;
  background: linear-gradient(165deg, rgba(13, 23, 42, 0.92) 0%, rgba(6, 11, 22, 0.96) 100%);
  border: 1px solid rgba(0, 240, 255, 0.35);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.65), 0 0 35px rgba(0, 240, 255, 0.18);
  backdrop-filter: blur(20px);
  overflow: hidden;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(0, 240, 255, 0.15);
  margin-bottom: 20px;
}

.terminal-dots {
  display: flex;
  gap: 7px;
}

.terminal-dots .dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.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); }

.terminal-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  font-family: var(--font-mono);
  color: var(--neon-cyan);
  letter-spacing: 1px;
  font-weight: 700;
}

.pulse-icon {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 8px var(--neon-cyan);
  animation: blinkDot 1s infinite;
}

.terminal-tag {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: #10b981;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-weight: 700;
}

/* 节点实时延迟监控条目 */
.node-meter-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 22px;
}

.node-item {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr 1.2fr;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all var(--transition-fast);
}

.node-item:hover, .node-item.active {
  background: rgba(0, 240, 255, 0.07);
  border-color: rgba(0, 240, 255, 0.35);
  transform: translateX(3px);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.node-flag {
  font-size: 1.1rem;
}

.node-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: #e2e8f0;
}

.node-ping {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--neon-cyan);
  text-align: right;
}

.node-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.node-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, #00f0ff, #0084ff);
  box-shadow: 0 0 10px var(--neon-cyan);
  animation: barPulse 2.4s ease-in-out infinite alternate;
}

.fill-hk { width: 94%; }
.fill-jp { width: 85%; }
.fill-us { width: 68%; }

@keyframes barPulse {
  0% { opacity: 0.75; }
  100% { opacity: 1; filter: brightness(1.2); }
}

/* 实时雷达与测速模块 */
.realtime-radar-wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px;
  background: rgba(0, 0, 0, 0.38);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.radar-circle {
  width: 82px;
  height: 82px;
  border-radius: 50%;
  border: 1px solid rgba(0, 240, 255, 0.4);
  background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 75%);
  position: relative;
  flex-shrink: 0;
  box-shadow: inset 0 0 15px rgba(0, 240, 255, 0.25);
}

.radar-circle::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(0, 240, 255, 0.2);
}

.radar-circle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(0, 240, 255, 0.2);
}

.radar-sweep {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: conic-gradient(from 0deg, rgba(0, 240, 255, 0.6) 0deg, transparent 65deg, transparent 360deg);
  animation: radarScan 3s linear infinite;
}

@keyframes radarScan {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.radar-center-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 0 10px var(--neon-cyan);
}

.radar-ping-dot {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 8px var(--neon-cyan);
  animation: blinkDot 1.8s infinite;
}
.dot-1 { top: 28%; left: 68%; }
.dot-2 { bottom: 25%; left: 32%; animation-delay: 0.9s; }

.speed-readout {
  display: flex;
  flex-direction: column;
}

.speed-val {
  font-family: var(--font-mono);
  font-size: 1.85rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1.1;
  text-shadow: 0 0 15px rgba(0, 240, 255, 0.6);
}

.speed-val small {
  font-size: 0.9rem;
  color: var(--neon-cyan);
  font-weight: 700;
}

.speed-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 3px;
  margin-bottom: 8px;
}

.live-metrics-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.badge-mini {
  font-size: 0.68rem;
  font-family: var(--font-mono);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.25);
  color: var(--neon-electric);
  font-weight: 600;
}

/* 解锁状态胶囊条 */
.terminal-apps-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.app-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.74rem;
  font-weight: 600;
  padding: 6px 4px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  color: #cbd5e1;
}

.chip-status {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 6px #10b981;
}

.stat-number {
  font-size: 1.85rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--neon-cyan);
  text-shadow: 0 0 12px var(--neon-cyan-glow);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   2. 产品核心优势 (3个图文卡片)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.cyber-card {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.cyber-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.cyber-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 16px 36px rgba(0, 240, 255, 0.12), 0 0 20px rgba(0, 132, 255, 0.08);
  background: var(--bg-card-hover);
}

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

.card-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 26px;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
  transition: all var(--transition-fast);
}

.cyber-card:hover .card-icon-wrap {
  background: rgba(0, 240, 255, 0.18);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 28px var(--neon-cyan-glow);
  transform: scale(1.05);
}

.card-icon-wrap svg {
  width: 32px;
  height: 32px;
  color: var(--neon-cyan);
}

.card-badge-num {
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  letter-spacing: 1px;
}

.card-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: #ffffff;
}

.card-desc {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.card-tag {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--neon-electric);
}

/* ==========================================================================
   3. 流媒体与 AI 支持图卡
   ========================================================================== */
.support-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.support-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px;
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 26px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.category-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.category-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(0, 240, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon-cyan);
}

.category-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
}

.category-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #10b981;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.category-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 6px #10b981;
}

.support-badges-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.platform-pill {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.platform-pill:hover {
  background: rgba(0, 240, 255, 0.07);
  border-color: rgba(0, 240, 255, 0.3);
  transform: translateX(4px);
}

.platform-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.4);
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--neon-cyan);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.platform-info {
  display: flex;
  flex-direction: column;
}

.platform-name {
  font-size: 0.92rem;
  font-weight: 600;
  color: #ffffff;
}

.platform-desc {
  font-size: 0.76rem;
  color: var(--text-dim);
}

/* ==========================================================================
   4. 套餐价格对比表 Pricing Table
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  backdrop-filter: blur(14px);
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--neon-cyan);
  box-shadow: 0 20px 45px rgba(0, 240, 255, 0.15);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(14, 30, 60, 0.85) 0%, rgba(10, 20, 40, 0.95) 100%);
  border: 2px solid var(--neon-cyan);
  box-shadow: 0 0 35px rgba(0, 240, 255, 0.25);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 0 0 45px rgba(0, 240, 255, 0.4);
}

.featured-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #00f0ff, #0084ff);
  color: #060911;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 0 16px var(--neon-cyan-glow);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.plan-type {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 42px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--neon-cyan);
}

.amount {
  font-size: 3.2rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: #ffffff;
  line-height: 1;
}

.duration {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.plan-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 34px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.94rem;
  color: #cbd5e1;
}

.plan-feature-item svg {
  width: 18px;
  height: 18px;
  color: var(--neon-cyan);
  flex-shrink: 0;
}

/* ==========================================================================
   5. 用户评价与口碑 Testimonials
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.testimonial-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 240, 255, 0.35);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.stars-row {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  color: #f59e0b;
}

.stars-row svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.testimonial-quote {
  font-size: 0.96rem;
  color: #cbd5e1;
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
  font-style: normal;
}

.reviewer-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(0, 132, 255, 0.2));
  border: 1px solid var(--neon-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: var(--neon-cyan);
}

.reviewer-details {
  display: flex;
  flex-direction: column;
}

.reviewer-name {
  font-size: 0.96rem;
  font-weight: 700;
  color: #ffffff;
}

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

/* ==========================================================================
   6. 常见问题解答 FAQ
   ========================================================================== */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.faq-card:hover {
  border-color: rgba(0, 240, 255, 0.35);
  background: var(--bg-card-hover);
}

.faq-question-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  user-select: none;
}

.faq-question {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
}

.faq-toggle-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0, 240, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon-cyan);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.faq-card.active .faq-toggle-icon {
  transform: rotate(180deg);
  background: var(--neon-cyan);
  color: #060911;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.7;
}

.faq-card.active .faq-answer {
  max-height: 200px;
  padding-top: 16px;
}

/* ==========================================================================
   7. 极简页脚 (SEO 深度增强与赛博荧蓝设计)
   ========================================================================== */
.site-footer {
  border-top: 1px solid rgba(0, 240, 255, 0.2);
  background: radial-gradient(circle at 50% 0%, rgba(0, 240, 255, 0.05), transparent 60%), #04070d;
  padding: 60px 0 45px 0;
  position: relative;
  z-index: 10;
}

.footer-content-wrap {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.footer-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  flex-wrap: wrap;
  gap: 20px;
}

.footer-brand-info {
  max-width: 580px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.footer-logo-title {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(90deg, #ffffff, var(--neon-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.footer-badge {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.35);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-tagline {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 全球节点实时运维微状态条 */
.footer-node-status {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.node-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: #94a3b8;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.node-ping {
  color: var(--neon-cyan);
  font-weight: 600;
}

/* 核心法律与导航条（严格保留四标题，新标签页打开） */
.footer-four-nav {
  display: flex;
  justify-content: center;
  padding: 4px 0;
}

.footer-nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #e2e8f0;
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.footer-nav-link:hover {
  color: #ffffff;
  border-color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.1);
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.25);
  transform: translateY(-2px);
}

/* SEO 关键词权重外链矩阵 (PBN 核心策略，严格 dofollow 与 target="_blank") */
.footer-seo-matrix {
  background: rgba(14, 23, 42, 0.45);
  border: 1px solid rgba(0, 240, 255, 0.18);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.footer-seo-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-seo-title {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--neon-cyan);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
}

.footer-seo-notice {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.footer-seo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-seo-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.86rem;
  color: #cbd5e1;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.footer-seo-tag:hover {
  color: #ffffff;
  border-color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.12);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0, 240, 255, 0.22);
}

.footer-seo-tag svg {
  color: var(--neon-cyan);
  flex-shrink: 0;
}

/* SEO 专栏内链拓扑网络 (Topical Silo Internal Links) */
.footer-silo-matrix {
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-silo-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: #94a3b8;
  font-family: var(--font-mono);
}

.footer-silo-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.footer-silo-link {
  font-size: 0.82rem;
  color: var(--text-dim);
  transition: all var(--transition-fast);
}

.footer-silo-link:hover {
  color: var(--neon-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 安全合规背书与状态 */
.footer-security-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  flex-wrap: wrap;
  gap: 14px;
}

.footer-security-chips {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.sec-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: #cbd5e1;
}

.sec-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
}

.footer-legal-note {
  font-size: 0.76rem;
  color: var(--text-dim);
  line-height: 1.5;
}

/* 页脚居中友情链接与 PBN 博客矩阵推荐 */
.footer-friend-links-center {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px 20px;
  background: rgba(0, 240, 255, 0.035);
  border: 1px solid rgba(0, 240, 255, 0.18);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.friend-links-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.friend-links-label {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--neon-cyan);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
}

.friend-link-anchor {
  font-size: 0.92rem;
  font-weight: 600;
  color: #38bdf8;
  padding: 5px 14px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.friend-link-anchor:hover {
  color: #ffffff;
  background: rgba(0, 240, 255, 0.2);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 14px rgba(0, 240, 255, 0.4);
  transform: translateY(-2px);
}

.link-divider {
  color: rgba(255, 255, 255, 0.2);
  font-size: 0.85rem;
}

/* 版权行 */
.footer-bottom-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  flex-wrap: wrap;
  gap: 14px;
}

.footer-copy {
  font-size: 0.84rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.footer-power {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.footer-power span {
  color: var(--neon-cyan);
}

/* ==========================================================================
   右侧悬浮章节导航 Arrow Controllers
   ========================================================================== */
.floating-section-nav {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: rgba(6, 9, 17, 0.75);
  border: 1px solid var(--border-subtle);
  padding: 10px 8px;
  border-radius: var(--radius-full);
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5), 0 0 15px rgba(0, 240, 255, 0.12);
}

.nav-arrow-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(14, 23, 42, 0.8);
  border: 1px solid rgba(0, 240, 255, 0.3);
  color: var(--neon-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  outline: none;
}

.nav-arrow-btn:hover {
  background: var(--neon-cyan);
  color: #060911;
  transform: scale(1.1);
  box-shadow: 0 0 16px var(--neon-cyan-glow);
}

.nav-arrow-btn:active {
  transform: scale(0.95);
}

.nav-arrow-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

.nav-arrow-btn svg {
  width: 22px;
  height: 22px;
  stroke-width: 2.5;
}

/* ==========================================================================
   子页面专有通用样式 (关于我们、服务条款、隐私政策、网站地图)
   ========================================================================== */
.subpage-hero {
  padding-top: 140px;
  padding-bottom: 40px;
  text-align: center;
}

.content-paper {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 48px;
  backdrop-filter: blur(14px);
  max-width: 920px;
  margin: 0 auto 80px auto;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.content-paper h2 {
  font-size: 1.6rem;
  color: #ffffff;
  margin: 36px 0 16px 0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.content-paper h2:first-child {
  margin-top: 0;
}

.content-paper h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 22px;
  background: var(--neon-cyan);
  box-shadow: 0 0 10px var(--neon-cyan);
  border-radius: 2px;
}

.content-paper p {
  color: var(--text-muted);
  font-size: 1.02rem;
  line-height: 1.8;
  margin-bottom: 18px;
}

.content-paper ul {
  list-style: none;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.content-paper li {
  color: #cbd5e1;
  font-size: 0.98rem;
  line-height: 1.7;
  padding-left: 24px;
  position: relative;
}

.content-paper li::before {
  content: "•";
  position: absolute;
  left: 6px;
  color: var(--neon-cyan);
  font-size: 1.2rem;
}

.sitemap-links-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.sitemap-link-card {
  display: flex;
  flex-direction: column;
  padding: 20px 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.sitemap-link-card:hover {
  background: rgba(0, 240, 255, 0.06);
  border-color: var(--neon-cyan);
  transform: translateY(-3px);
}

.sitemap-link-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sitemap-link-url {
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--neon-electric);
}

/* ==========================================================================
   SEO 专栏文章图卡与阅读排版 (Blog Cards & Article Reader Styles)
   ========================================================================== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(14px);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.blog-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.blog-card:hover {
  transform: translateY(-5px);
  border-color: var(--neon-cyan);
  box-shadow: 0 16px 36px rgba(0, 240, 255, 0.12);
  background: var(--bg-card-hover);
}

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

.blog-card-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.blog-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  line-height: 1.45;
  transition: color var(--transition-fast);
}

.blog-card:hover .blog-card-title {
  color: var(--neon-cyan);
}

.blog-card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.8rem;
  color: var(--text-dim);
}

.blog-card-date {
  font-family: var(--font-mono);
}

.blog-read-btn {
  font-weight: 600;
  color: var(--neon-cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.blog-card:hover .blog-read-btn {
  text-shadow: 0 0 10px var(--neon-cyan-glow);
}

/* 文章详情页专有排版 */
.article-page-wrap {
  padding-top: 110px;
  padding-bottom: 60px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

.breadcrumb a:hover {
  color: var(--neon-cyan);
}

.breadcrumb-separator {
  color: rgba(255, 255, 255, 0.2);
}

.breadcrumb-current {
  color: var(--neon-cyan);
  max-width: 420px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-meta-top {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.article-tag-badge {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.3);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.article-date, .article-readtime {
  font-size: 0.86rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.article-main-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.3;
  letter-spacing: -0.5px;
}

.article-lead {
  font-size: 1.12rem;
  color: #e2e8f0;
  line-height: 1.8;
  margin-bottom: 24px;
  padding: 18px 22px;
  background: rgba(0, 240, 255, 0.05);
  border-left: 4px solid var(--neon-cyan);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.brand-alert-box {
  background: rgba(0, 132, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.3);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin-bottom: 26px;
  color: #bae6fd;
  font-size: 0.96rem;
}

.inline-internal-link {
  color: var(--neon-cyan);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.inline-internal-link:hover {
  color: #ffffff;
  text-shadow: 0 0 10px var(--neon-cyan);
}

.article-body h2 {
  font-size: 1.5rem;
  color: #ffffff;
  margin: 36px 0 16px 0;
}

.article-body h3 {
  font-size: 1.2rem;
  color: #7dd3fc;
  margin: 22px 0 12px 0;
}

.article-body p {
  color: #cbd5e1;
  font-size: 1.02rem;
  line-height: 1.85;
  margin-bottom: 18px;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(14, 23, 42, 0.95), rgba(7, 12, 23, 0.95));
  border: 1.5px solid var(--neon-cyan);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  margin: 48px 0 24px 0;
  box-shadow: 0 0 40px rgba(0, 240, 255, 0.18);
  position: relative;
  overflow: hidden;
}

.cta-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  color: #060911;
  background: linear-gradient(90deg, #00f0ff, #0084ff);
  padding: 4px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.cta-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
}

.cta-desc {
  font-size: 0.96rem;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 24px auto;
}

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

.article-footer-meta {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.article-tag-cloud {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.tag-label {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.tag-chip {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: #93c5fd;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
}

.article-back-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

/* ==========================================================================
   移动端与响应式适配 (@media 媒体查询)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-left {
    text-align: center;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .hero-stats-bar {
    max-width: 600px;
    margin: 0 auto;
  }

  .stat-item {
    align-items: center;
  }

  .features-grid,
  .pricing-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }

  .support-container {
    grid-template-columns: 1fr;
  }

  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .navbar {
    padding: 6px 0;
  }

  .nav-wrap {
    flex-wrap: wrap;
    height: auto;
    gap: 10px;
  }

  .nav-links {
    display: flex;
    width: 100%;
    order: 3;
    overflow-x: auto;
    padding-bottom: 4px;
    gap: 10px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-link {
    font-size: 0.82rem;
    white-space: nowrap;
    padding: 5px 12px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-full);
    border: 1px solid rgba(0, 240, 255, 0.16);
    color: #e2e8f0;
  }

  .nav-action .btn {
    width: auto;
    min-height: 40px;
    padding: 8px 18px;
    font-size: 0.88rem;
  }

  .section {
    padding: 65px 0;
  }

  .hero-section {
    padding-top: 130px;
    padding-bottom: 60px;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 0.98rem;
    margin-bottom: 28px;
  }

  .hero-stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .stat-item:nth-child(2)::after {
    display: none;
  }

  .support-badges-grid {
    grid-template-columns: 1fr;
  }

  .floating-section-nav {
    right: 12px;
    padding: 6px 4px;
  }

  .nav-arrow-btn {
    width: 38px;
    height: 38px;
  }

  .content-paper {
    padding: 26px 18px;
  }

  .sitemap-links-grid {
    grid-template-columns: 1fr;
  }

  .footer-nav-list {
    flex-direction: column;
    gap: 16px;
  }

  .btn {
    width: 100%;
    min-height: 50px;
  }

  .hero-cta-group {
    flex-direction: column;
    gap: 14px;
  }

  .terminal-apps-row {
    grid-template-columns: repeat(2, 1fr);
  }
}