/* ==========================================================================
   梯子云 (Tiziyun) - AI 高级感 · 旗舰未来科技流 (Next-Gen AI Tech Aesthetic)
   灵感源自 OpenAI / Linear / Perplexity / Vercel 前沿美学
   纯原生 CSS · 零外部重型依赖 · 毫秒级秒开 · 极光微光 · 赛博矩阵
   ========================================================================== */

:root {
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "Fira Code", "JetBrains Mono", Consolas, Courier, monospace;

  /* AI 极曜黑镜色彩体系 */
  --bg-primary: #05070d;
  --bg-secondary: #080c16;
  --bg-card: rgba(13, 19, 34, 0.65);
  --bg-card-hover: rgba(18, 27, 48, 0.82);
  --bg-glass: rgba(5, 7, 13, 0.82);
  
  --text-main: #f8fafc;
  --text-body: #94a3b8;
  --text-light: #64748b;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-hover: rgba(56, 189, 248, 0.45);
  --border-glow: rgba(56, 189, 248, 0.2);
  
  /* AI 极光霓虹渐变色彩 */
  --ai-cyan: #00f2fe;
  --ai-blue: #38bdf8;
  --ai-indigo: #6366f1;
  --ai-purple: #a855f7;
  --ai-emerald: #10b981;
  --ai-orange: #ff7e5f;
  
  --gradient-ai: linear-gradient(135deg, #ffffff 0%, #38bdf8 50%, #c084fc 100%);
  --gradient-primary: linear-gradient(135deg, #00f2fe 0%, #38bdf8 45%, #6366f1 100%);
  --gradient-purple: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --gradient-badge: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(168, 85, 247, 0.15) 100%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);

  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 12px 30px -5px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 20px 50px -10px rgba(0, 0, 0, 0.8);
  --shadow-glow: 0 0 35px rgba(0, 242, 254, 0.35);
  --shadow-glow-purple: 0 0 35px rgba(168, 85, 247, 0.3);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --container-max: 1200px;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-base);
  background-color: var(--bg-primary);
  color: var(--text-body);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  /* 科技感矩阵微点纹理 */
  background-image: 
    radial-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px),
    radial-gradient(ellipse at 50% 0%, rgba(56, 189, 248, 0.12) 0%, rgba(99, 102, 241, 0.08) 35%, transparent 70%);
  background-size: 32px 32px, 100% 900px;
  background-position: 0 0, center top;
  background-repeat: repeat, no-repeat;
}

/* 顶部与底部未来 AI 弥散光球 */
body::before {
  content: "";
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(0, 242, 254, 0.12) 0%, rgba(168, 85, 247, 0.08) 45%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  filter: blur(40px);
}

body::after {
  content: "";
  position: fixed;
  bottom: -200px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.06) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
  filter: blur(50px);
}

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

img, svg {
  display: block;
}

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

/* 标题样式 */
h1, h2, h3, h4, h5 {
  color: var(--text-main);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.025em;
}

.gradient-text {
  background: var(--gradient-ai);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  text-shadow: 0 0 30px rgba(56, 189, 248, 0.2);
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-full);
  color: var(--ai-blue);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 16px;
  backdrop-filter: blur(8px);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.15);
}

.section-title {
  font-size: 2.45rem;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-body);
}

/* ==========================================================================
   导航栏 (Navbar)
   ========================================================================== */
.navbar-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.brand-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #6366f1 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #05070d;
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.45);
  transition: var(--transition);
}

.brand-logo:hover .logo-icon {
  transform: scale(1.06);
  box-shadow: 0 0 30px rgba(0, 242, 254, 0.65);
}

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

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

.nav-link:hover {
  color: var(--text-main);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

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

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

.btn-nav-login {
  padding: 8px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(8px);
}

.btn-nav-login:hover {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.08);
}

.btn-nav-cta {
  padding: 9px 20px;
  font-size: 0.9rem;
  font-weight: 700;
  color: #05070d;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.35);
  position: relative;
  overflow: hidden;
}

.btn-nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 30px rgba(0, 242, 254, 0.6);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 6px;
}

/* ==========================================================================
   首屏横幅区 (Hero Section) - AI 旗舰视效
   ========================================================================== */
.hero-section {
  padding: 165px 0 95px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 22px;
  background: rgba(168, 85, 247, 0.12);
  border: 1px solid rgba(168, 85, 247, 0.35);
  border-radius: var(--radius-full);
  color: #d8b4fe;
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 28px;
  box-shadow: 0 0 25px rgba(168, 85, 247, 0.25);
  animation: ai-pulse 3s infinite;
}

@keyframes ai-pulse {
  0%, 100% {
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.2);
    border-color: rgba(168, 85, 247, 0.35);
  }
  50% {
    box-shadow: 0 0 35px rgba(0, 242, 254, 0.4);
    border-color: rgba(0, 242, 254, 0.5);
    color: #e0f2fe;
  }
}

.hero-title {
  font-size: 3.75rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-body);
  max-width: 840px;
  margin: 0 auto 42px;
  line-height: 1.75;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.btn-primary-hero {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 17px 42px;
  background: var(--gradient-primary);
  color: #05070d;
  font-size: 1.15rem;
  font-weight: 800;
  border-radius: var(--radius-md);
  box-shadow: 0 0 35px rgba(0, 242, 254, 0.45);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.btn-primary-hero::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    60deg,
    transparent,
    rgba(255, 255, 255, 0.25),
    transparent
  );
  transform: rotate(30deg);
  animation: shimmer 4s infinite;
}

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

.btn-primary-hero:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 0 50px rgba(0, 242, 254, 0.7);
}

/* 核心指标统计 - AI 集群样式 */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  position: relative;
}

.hero-metrics::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20%;
  right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.6), transparent);
}

.metric-item {
  text-align: center;
}

.metric-value {
  font-size: 2.15rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  background: linear-gradient(180deg, #ffffff 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.metric-label {
  font-size: 0.88rem;
  color: var(--text-light);
  font-weight: 600;
}

/* ==========================================================================
   核心优势图卡区 (Dynamic Cards Section)
   ========================================================================== */
.features-section {
  padding: 100px 0;
  position: relative;
}

.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 56px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
}

/* 顶部高光反射条 (Apple / Linear 级质感) */
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-color-hover);
  background: var(--bg-card-hover);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.6), 0 0 25px rgba(56, 189, 248, 0.2);
}

.card-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ai-cyan);
  margin-bottom: 24px;
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
}

.card-icon-wrap.purple {
  background: rgba(168, 85, 247, 0.1);
  border-color: rgba(168, 85, 247, 0.2);
  color: #c084fc;
  box-shadow: 0 0 15px rgba(168, 85, 247, 0.15);
}

.card-icon-wrap.gold {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.15);
}

.feature-card h3 {
  font-size: 1.35rem;
  margin-bottom: 14px;
}

.feature-card p {
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--text-body);
}

/* 流媒体与 AI 支持图卡 - AI 矩阵专区 */
.unlock-showcase {
  background: linear-gradient(160deg, rgba(16, 24, 44, 0.8) 0%, rgba(8, 12, 24, 0.9) 100%);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-lg);
  padding: 46px;
  backdrop-filter: blur(16px);
  box-shadow: 0 0 40px rgba(56, 189, 248, 0.1);
  position: relative;
}

.unlock-showcase::before {
  content: "";
  position: absolute;
  top: 0;
  left: 25%;
  right: 25%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.6), transparent);
}

.showcase-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 36px;
}

.showcase-header h3 {
  font-size: 1.85rem;
  margin-bottom: 10px;
}

.showcase-sub {
  color: var(--text-body);
  font-size: 1.02rem;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-box {
  background: rgba(5, 8, 16, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
}

.showcase-box:hover {
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.showcase-box-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.15rem;
  color: var(--text-main);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--text-main);
  font-weight: 500;
  transition: var(--transition);
}

.tag-item:hover {
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--ai-cyan);
  color: var(--ai-cyan);
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.3);
}

/* ==========================================================================
   定价卡片区 (Pricing Section)
   ========================================================================== */
.pricing-section {
  padding: 100px 0;
  position: relative;
}

.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-color);
  border-radius: var(--radius-lg);
  padding: 42px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-color-hover);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.6);
}

/* 推荐卡片高亮 - AI 旗舰高阶质感 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(22, 33, 60, 0.92) 0%, rgba(11, 16, 32, 0.88) 100%);
  border: 2px solid #38bdf8;
  box-shadow: 0 0 45px rgba(56, 189, 248, 0.28);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 0 0 60px rgba(56, 189, 248, 0.45);
}

.pricing-badge-popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: #05070d;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 5px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.5);
}

.plan-header {
  margin-bottom: 24px;
  text-align: center;
}

.plan-name {
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.plan-type {
  font-size: 0.9rem;
  color: var(--text-light);
}

.plan-price-wrap {
  margin: 20px 0;
  text-align: center;
}

.plan-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--ai-cyan);
  vertical-align: top;
}

.plan-amount {
  font-size: 3.3rem;
  font-weight: 900;
  color: var(--text-main);
  font-family: var(--font-mono);
  line-height: 1;
}

.plan-period {
  font-size: 0.95rem;
  color: var(--text-light);
}

.plan-traffic-pill {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: var(--radius-full);
  color: var(--ai-cyan);
  font-size: 0.94rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.pricing-card.featured .plan-traffic-pill {
  background: rgba(0, 242, 254, 0.16);
  border-color: rgba(0, 242, 254, 0.45);
}

.plan-features-list {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.94rem;
  margin-bottom: 14px;
  color: var(--text-body);
}

.plan-features-list svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--ai-cyan);
}

.btn-pricing-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 20px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.btn-pricing-cta:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-2px);
}

.pricing-card.featured .btn-pricing-cta {
  background: var(--gradient-primary);
  color: #05070d;
  border: none;
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.4);
}

.pricing-card.featured .btn-pricing-cta:hover {
  box-shadow: 0 6px 30px rgba(0, 242, 254, 0.65);
}

/* ==========================================================================
   深度特性解析区 (Why Choose Section) - AI 遥测与代码审计
   ========================================================================== */
.why-section {
  padding: 100px 0;
  position: relative;
}

.why-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 90px;
}

.why-row.reverse {
  grid-template-columns: 1fr 1fr;
}

.why-content h3 {
  font-size: 2.15rem;
  margin-bottom: 18px;
  line-height: 1.32;
}

.why-content p {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-body);
  margin-bottom: 24px;
}

.why-bullets {
  list-style: none;
}

.why-bullets li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 12px;
}

.why-bullets svg {
  color: var(--ai-cyan);
  flex-shrink: 0;
}

/* 数据动态监控面板 - AI 算力集群遥测感 */
.data-panel-card {
  background: rgba(10, 16, 30, 0.75);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-lg);
  padding: 34px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-lg), 0 0 35px rgba(56, 189, 248, 0.12);
  position: relative;
}

.data-panel-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20%;
  right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.7), transparent);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--text-main);
}

.status-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 700;
  color: #34d399;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: pulse-green 1.8s infinite;
}

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

.panel-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 24px;
}

.panel-stat-item {
  background: rgba(5, 8, 16, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.panel-stat-label {
  font-size: 0.82rem;
  color: var(--text-light);
  margin-bottom: 6px;
  font-weight: 600;
}

.panel-stat-val {
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--text-main);
  font-family: var(--font-mono);
}

.panel-stat-val.highlight {
  color: var(--ai-cyan);
  text-shadow: 0 0 12px rgba(0, 242, 254, 0.3);
}

.progress-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: 10px;
}

.progress-bar {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  width: 99.8%;
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.6);
}

/* 终端代码块样式 (Strict_No_Logs_Policy.sh) */
.terminal-card {
  background: #030509;
  border: 1px solid #1e293b;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.8), 0 0 25px rgba(56, 189, 248, 0.1);
  font-family: var(--font-mono);
}

.terminal-header {
  background: #0d1322;
  padding: 13px 18px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid #1e293b;
}

.terminal-controls {
  display: flex;
  gap: 7px;
  margin-right: 16px;
}

.t-btn {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.t-close { background: #ef4444; }
.t-min { background: #f59e0b; }
.t-max { background: #10b981; }

.terminal-filename {
  font-size: 0.84rem;
  color: #94a3b8;
  font-weight: 600;
}

.terminal-body {
  padding: 24px;
  font-size: 0.88rem;
  line-height: 1.75;
  color: #cbd5e1;
  overflow-x: auto;
}

.term-comment { color: #64748b; font-style: italic; }
.term-cmd { color: #38bdf8; font-weight: 600; }
.term-prompt { color: #34d399; }
.term-ok { color: #4ade80; font-weight: 700; }
.term-secure { color: #00f2fe; font-weight: 700; text-shadow: 0 0 8px rgba(0, 242, 254, 0.4); }
.term-cursor {
  display: inline-block;
  width: 8px;
  height: 16px;
  background: #38bdf8;
  vertical-align: -2px;
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ==========================================================================
   用户评价跑马灯区 (Testimonials Marquee Section)
   ========================================================================== */
.testimonials-section {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.marquee-container {
  display: flex;
  width: 100%;
  overflow: hidden;
  user-select: none;
  position: relative;
  mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
}

.marquee-track {
  display: flex;
  gap: 24px;
  animation: marquee-scroll 45s linear infinite;
  padding: 12px 0;
}

.marquee-container:hover .marquee-track {
  animation-play-state: paused;
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.review-card {
  flex: 0 0 360px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.review-card:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.avatar-initial {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--ai-cyan);
  font-size: 1.05rem;
}

.reviewer-meta h4 {
  font-size: 0.98rem;
  margin-bottom: 2px;
}

.reviewer-meta span {
  font-size: 0.8rem;
  color: var(--text-light);
}

.stars-rating {
  color: #fbbf24;
  margin-bottom: 12px;
  display: flex;
  gap: 2px;
  font-size: 0.95rem;
}

.review-text {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text-body);
}

/* ==========================================================================
   常见问题解答区 (FAQ Section)
   ========================================================================== */
.faq-section {
  padding: 100px 0;
  position: relative;
}

.faq-wrapper {
  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: 16px;
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(12px);
}

.faq-item:hover {
  border-color: var(--border-color-hover);
}

.faq-summary {
  padding: 22px 26px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

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

.faq-chevron {
  transition: transform 0.3s ease;
  color: var(--ai-cyan);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-item[open] {
  background: var(--bg-card-hover);
  border-color: rgba(56, 189, 248, 0.4);
}

.faq-content {
  padding: 0 26px 24px;
  color: var(--text-body);
  font-size: 0.98rem;
  line-height: 1.75;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 16px;
}

/* ==========================================================================
   底部转化区 (CTA Section) - 能量汇聚感
   ========================================================================== */
.cta-section {
  padding: 100px 0 120px;
  position: relative;
}

.cta-box {
  background: linear-gradient(135deg, rgba(16, 26, 48, 0.92) 0%, rgba(7, 10, 20, 0.96) 100%);
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: var(--radius-lg);
  padding: 68px 40px;
  text-align: center;
  box-shadow: 0 0 60px rgba(0, 242, 254, 0.2);
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 350px;
  background: radial-gradient(ellipse, rgba(0, 242, 254, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.cta-title {
  font-size: 2.65rem;
  margin-bottom: 18px;
}

.cta-desc {
  font-size: 1.15rem;
  color: var(--text-body);
  max-width: 660px;
  margin: 0 auto 38px;
}

.btn-large-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 18px 48px;
  font-size: 1.25rem;
  font-weight: 800;
  color: #05070d;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  box-shadow: 0 0 40px rgba(0, 242, 254, 0.5);
  transition: var(--transition);
}

.btn-large-cta:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 0 55px rgba(0, 242, 254, 0.75);
}

.cta-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  margin-top: 38px;
  flex-wrap: wrap;
  font-size: 0.92rem;
  color: var(--text-light);
}

.cta-badge-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cta-badge-item svg {
  color: #10b981;
}

/* ==========================================================================
   页脚 (Footer) - 严格遵循只保留4个标题并在新页面打开
   ========================================================================== */
.footer-wrapper {
  background: #030408;
  border-top: 1px solid var(--border-color);
  padding: 44px 0 32px;
  position: relative;
  z-index: 10;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--ai-cyan);
  background: rgba(0, 242, 254, 0.08);
}

.footer-copyright {
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-light);
}

/* ==========================================================================
   独立合规/信息页面基础样式 (About, Terms, Privacy, Sitemap, News)
   ========================================================================== */
.page-container {
  max-width: 920px;
  margin: 120px auto 80px;
  padding: 40px 24px;
}

.page-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-lg);
}

.page-title {
  font-size: 2.45rem;
  margin-bottom: 12px;
}

.page-subtitle {
  font-size: 1.02rem;
  color: var(--text-light);
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.page-body h2 {
  font-size: 1.55rem;
  margin: 34px 0 16px;
  color: var(--text-main);
}

.page-body h3 {
  font-size: 1.22rem;
  margin: 22px 0 10px;
  color: var(--ai-cyan);
}

.page-body p {
  font-size: 1.02rem;
  line-height: 1.85;
  margin-bottom: 18px;
  color: var(--text-body);
}

.page-body ul, .page-body ol {
  margin: 0 0 22px 24px;
  color: var(--text-body);
}

.page-body li {
  margin-bottom: 10px;
  line-height: 1.75;
}

.page-back-nav {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ==========================================================================
   推荐资讯与深度 SEO 文章专栏扩展样式
   ========================================================================== */
.articles-portal-header {
  text-align: center;
  max-width: 860px;
  margin: 0 auto 50px;
}

.articles-portal-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: var(--radius-full);
  color: var(--ai-cyan);
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.articles-nav-toc {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 50px;
  backdrop-filter: blur(14px);
}

.toc-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

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

.toc-link-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-body);
  font-size: 0.94rem;
  font-weight: 600;
  transition: var(--transition);
}

.toc-link-item:hover {
  background: rgba(0, 242, 254, 0.08);
  border-color: var(--ai-cyan);
  color: var(--ai-cyan);
  transform: translateX(4px);
}

.toc-badge {
  background: rgba(0, 242, 254, 0.15);
  color: var(--ai-cyan);
  font-size: 0.76rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.article-post-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  margin-bottom: 56px;
  backdrop-filter: blur(14px);
  position: relative;
  transition: var(--transition);
}

.article-post-card:hover {
  border-color: var(--border-color-hover);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5);
}

.article-post-card.highlight-brand {
  border: 2px solid rgba(56, 189, 248, 0.5);
  box-shadow: 0 0 35px rgba(56, 189, 248, 0.18);
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-tag-pill {
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-full);
  color: var(--ai-cyan);
  font-weight: 700;
  font-size: 0.82rem;
}

.article-post-title {
  font-size: 2.15rem;
  line-height: 1.35;
  margin-bottom: 20px;
  color: var(--text-main);
}

.article-summary-box {
  background: rgba(8, 14, 26, 0.7);
  border-left: 4px solid var(--ai-cyan);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 30px;
  font-size: 1.02rem;
  line-height: 1.75;
  color: #cbd5e1;
}

.article-rich-content h3 {
  font-size: 1.48rem;
  margin: 36px 0 16px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-rich-content h3::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 22px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.article-rich-content h4 {
  font-size: 1.2rem;
  margin: 22px 0 10px;
  color: var(--ai-blue);
}

.article-rich-content p {
  font-size: 1.04rem;
  line-height: 1.85;
  color: var(--text-body);
  margin-bottom: 18px;
}

.article-rich-content ul,
.article-rich-content ol {
  margin: 0 0 24px 26px;
  color: var(--text-body);
}

.article-rich-content li {
  margin-bottom: 10px;
  line-height: 1.75;
}

.article-callout {
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin: 24px 0;
}

.article-callout.success {
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.3);
}

.seo-internal-link {
  color: var(--ai-cyan);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: var(--transition);
}

.seo-internal-link:hover {
  color: #ffffff;
  text-shadow: 0 0 10px rgba(0, 242, 254, 0.6);
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 24px 0 32px;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.article-table th {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  padding: 14px 18px;
  border: 1px solid var(--border-color);
  font-weight: 800;
}

.article-table td {
  padding: 14px 18px;
  border: 1px solid var(--border-color);
  color: var(--text-body);
}

.article-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* ==========================================================================
   响应式设计 (@media) - 确保手机端完美单栏展示与大拇指点击
   ========================================================================== */
@media (max-width: 1024px) {
  .cards-grid-3,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }
  
  .why-row {
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .navbar {
    height: 64px;
  }

  .nav-menu {
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    background: #080c16;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.7);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    opacity: 0;
    pointer-events: none;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle {
    display: block;
  }

  .nav-actions {
    display: none;
  }

  .hero-section {
    padding: 120px 0 60px;
  }

  .hero-title {
    font-size: 2.3rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary-hero {
    width: 100%;
    min-height: 52px;
  }

  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    padding: 20px;
    gap: 16px;
  }

  .cards-grid-3 {
    grid-template-columns: 1fr;
  }

  .showcase-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .why-row,
  .why-row.reverse {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .why-row.reverse .terminal-card {
    order: 2;
  }
  .why-row.reverse .why-content {
    order: 1;
  }

  .panel-stats-grid {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .cta-title {
    font-size: 1.95rem;
  }

  .btn-large-cta {
    width: 100%;
    min-height: 56px;
    padding: 16px 20px;
  }

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

  .page-card {
    padding: 28px 20px;
  }

  .page-title {
    font-size: 1.8rem;
  }

  .toc-grid {
    grid-template-columns: 1fr;
  }
  
  .article-post-card {
    padding: 28px 20px;
  }
  
  .article-post-title {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-metrics {
    grid-template-columns: 1fr;
  }
  
  .review-card {
    flex: 0 0 290px;
  }
}