/* ==========================================================================
   乌龟加速 (wuguijs.lat) - 核心样式表
   极简纯原生 CSS 架构：无第三方框架、毫秒级秒开、响应式极客科技风
   ========================================================================== */

:root {
  --bg-main: #090d16;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(26, 35, 56, 0.85);
  --bg-card-border: rgba(56, 189, 248, 0.12);
  --bg-card-border-active: rgba(56, 189, 248, 0.4);
  
  --primary: #0ea5e9;
  --primary-glow: rgba(14, 165, 233, 0.35);
  --secondary: #10b981;
  --secondary-glow: rgba(16, 185, 129, 0.3);
  --accent: #6366f1;
  --warning: #f59e0b;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --gradient-brand: linear-gradient(135deg, #38bdf8 0%, #6366f1 50%, #10b981 100%);
  --gradient-cta: linear-gradient(135deg, #0284c7 0%, #0ea5e9 50%, #38bdf8 100%);
  --gradient-badge: linear-gradient(90deg, rgba(14, 165, 233, 0.15), rgba(99, 102, 241, 0.15));

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --container-max: 1200px;
  --nav-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background: 
    radial-gradient(circle at 15% 15%, rgba(14, 165, 233, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 30%, rgba(99, 102, 241, 0.07) 0%, transparent 45%),
    radial-gradient(circle at 50% 80%, rgba(16, 185, 129, 0.05) 0%, transparent 50%),
    var(--bg-main);
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

ul, ol {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
}

/* 容器规范 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 语义化通用排版 */
.section {
  padding: 96px 0;
  position: relative;
}

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

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--gradient-badge);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: #38bdf8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--text-main);
}

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

.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==========================================================================
   导航栏 (Navbar)
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(9, 13, 22, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: all 0.3s ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.brand-icon-box {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, #0284c7, #38bdf8);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px var(--primary-glow);
}

.brand-icon-box svg {
  width: 24px;
  height: 24px;
  fill: #ffffff;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
}

.nav-link:hover {
  color: #38bdf8;
}

.nav-link.highlight {
  color: #38bdf8;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-link.highlight::after {
  content: 'HOT';
  font-size: 0.65rem;
  font-weight: 700;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #ffffff;
  padding: 1px 5px;
  border-radius: 4px;
}

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

.btn-nav-login {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.03);
}

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

.btn-nav-primary {
  font-size: 0.9rem;
  font-weight: 600;
  color: #ffffff;
  padding: 9px 20px;
  border-radius: var(--radius-full);
  background: var(--gradient-cta);
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-nav-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5);
}

/* 汉堡菜单复选框原生开关 (无需JS) */
.nav-toggle-input {
  display: none;
}

.nav-toggle-label {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  z-index: 1010;
}

.nav-toggle-label span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--text-main);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ==========================================================================
   首屏横幅区 (Hero Section)
   ========================================================================== */
.hero-section {
  padding-top: calc(var(--nav-height) + 64px);
  padding-bottom: 96px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-glow-bg {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 320px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.22) 0%, rgba(99, 102, 241, 0.12) 40%, transparent 70%);
  filter: blur(80px);
  z-index: 0;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
}

.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-full);
  margin-bottom: 28px;
  box-shadow: 0 0 20px rgba(14, 165, 233, 0.2);
  animation: pulse-border 2.5s infinite;
}

@keyframes pulse-border {
  0%, 100% { border-color: rgba(56, 189, 248, 0.35); box-shadow: 0 0 20px rgba(14, 165, 233, 0.2); }
  50% { border-color: rgba(16, 185, 129, 0.5); box-shadow: 0 0 30px rgba(16, 185, 129, 0.3); }
}

.promo-tag {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}

.promo-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: #e2e8f0;
}

.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 720px;
  margin: 0 auto 40px auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  padding: 16px 36px;
  border-radius: var(--radius-full);
  background: var(--gradient-cta);
  box-shadow: 0 8px 30px rgba(14, 165, 233, 0.45);
  transition: all 0.3s ease;
}

.btn-hero-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 35px rgba(14, 165, 233, 0.65);
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #f1f5f9;
  padding: 16px 32px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-hero-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.35);
}

.hero-stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
  padding: 24px;
  background: rgba(18, 24, 38, 0.5);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
}

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

.stat-val {
  font-size: 1.6rem;
  font-weight: 800;
  color: #38bdf8;
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ==========================================================================
   核心优势图卡区 (Dynamic Cards Section)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 36px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #38bdf8, transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--bg-card-border-active);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
}

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

.card-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.card-icon-wrap svg {
  width: 28px;
  height: 28px;
  stroke: #38bdf8;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-main);
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 流媒体与 AI 支持大图卡 */
.media-ai-card {
  background: linear-gradient(135deg, rgba(18, 24, 38, 0.9), rgba(26, 35, 56, 0.85));
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.media-ai-card::after {
  content: '';
  position: absolute;
  right: -50px;
  bottom: -50px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.media-ai-text h3 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.media-ai-text p {
  color: var(--text-muted);
  font-size: 1.02rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.badges-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.88rem;
  font-weight: 600;
  color: #e2e8f0;
}

.badge-pill.ai {
  border-color: rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.1);
  color: #34d399;
}

.badge-pill.stream {
  border-color: rgba(239, 68, 68, 0.4);
  background: rgba(239, 68, 68, 0.1);
  color: #f87171;
}

.media-ai-visual {
  background: rgba(11, 15, 25, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 24px;
}

.visual-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.visual-row:last-child {
  border-bottom: none;
}

.visual-platform {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
}

.visual-status {
  font-size: 0.82rem;
  font-weight: 700;
  color: #10b981;
  background: rgba(16, 185, 129, 0.12);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

/* ==========================================================================
   定价卡片区 (Pricing Section)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--bg-card-border-active);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(24, 34, 56, 0.95) 0%, rgba(18, 24, 38, 0.9) 100%);
  border: 2px solid #38bdf8;
  box-shadow: 0 0 35px rgba(14, 165, 233, 0.25);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 0 20px 45px rgba(14, 165, 233, 0.35);
}

.badge-featured {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #0284c7, #38bdf8);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 5px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.4);
}

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

.plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}

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

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

.currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: #38bdf8;
}

.price-num {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
  font-family: var(--font-mono);
}

.price-cycle {
  font-size: 0.9rem;
  color: var(--text-dim);
}

.plan-traffic-highlight {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px dashed rgba(56, 189, 248, 0.3);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #38bdf8;
}

.plan-features-list {
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
  color: #cbd5e1;
  margin-bottom: 14px;
}

.plan-features-list li svg {
  width: 18px;
  height: 18px;
  stroke: #10b981;
  flex-shrink: 0;
  margin-top: 2px;
}

.btn-pricing-cta {
  display: block;
  text-align: center;
  width: 100%;
  padding: 14px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: all 0.3s ease;
}

.btn-pricing-cta:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.35);
}

.pricing-card.featured .btn-pricing-cta {
  background: var(--gradient-cta);
  border: none;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.pricing-card.featured .btn-pricing-cta:hover {
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.6);
  transform: translateY(-2px);
}

/* ==========================================================================
   深度特性解析区 (Why Choose Section)
   ========================================================================== */
.feature-split-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 80px;
}

.feature-split-row.reverse {
  direction: rtl;
}

.feature-split-row.reverse > * {
  direction: ltr;
}

.split-text h3 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 18px;
}

.split-text p {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.split-bullets {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.split-bullet-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  color: #e2e8f0;
}

.split-bullet-item svg {
  width: 20px;
  height: 20px;
  stroke: #38bdf8;
  flex-shrink: 0;
}

/* 动态数据面板 */
.data-panel-card {
  background: rgba(18, 24, 38, 0.9);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.panel-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pulse-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: #10b981;
}

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

@keyframes pulse-ring {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

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

.metric-box {
  background: rgba(11, 15, 25, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.metric-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.metric-num {
  font-size: 1.4rem;
  font-weight: 800;
  color: #38bdf8;
  font-family: var(--font-mono);
}

.speed-bar-wrap {
  margin-top: 14px;
}

.speed-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.speed-progress-bg {
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  overflow: hidden;
}

.speed-progress-fill {
  height: 100%;
  width: 96%;
  background: linear-gradient(90deg, #0ea5e9, #10b981);
  border-radius: 4px;
}

/* 终端代码块 (Strict_No_Logs_Policy.sh) */
.terminal-window {
  background: #090d16;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  font-family: var(--font-mono);
}

.terminal-topbar {
  background: #131b2e;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

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

.t-red { background: #ef4444; }
.t-yellow { background: #f59e0b; }
.t-green { background: #10b981; }

.terminal-title {
  font-size: 0.82rem;
  color: #94a3b8;
  margin-left: 8px;
}

.terminal-body {
  padding: 20px;
  font-size: 0.86rem;
  line-height: 1.7;
  color: #cbd5e1;
}

.t-prompt {
  color: #38bdf8;
}

.t-cmd {
  color: #f8fafc;
  font-weight: 700;
}

.t-comment {
  color: #64748b;
}

.t-success {
  color: #34d399;
}

.t-warn {
  color: #fbbf24;
}

/* ==========================================================================
   底部转化区 (CTA Section)
   ========================================================================== */
.cta-banner-box {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.25) 0%, rgba(99, 102, 241, 0.2) 100%);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-lg);
  padding: 64px 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.cta-banner-box::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.cta-banner-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 auto;
}

.cta-banner-title {
  font-size: clamp(2rem, 3.5vw, 2.6rem);
  font-weight: 900;
  margin-bottom: 18px;
}

.cta-banner-desc {
  font-size: 1.1rem;
  color: #cbd5e1;
  margin-bottom: 36px;
  line-height: 1.7;
}

.btn-cta-large {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.2rem;
  font-weight: 800;
  color: #ffffff;
  padding: 18px 44px;
  border-radius: var(--radius-full);
  background: var(--gradient-cta);
  box-shadow: 0 8px 30px rgba(14, 165, 233, 0.5);
  transition: all 0.3s ease;
}

.btn-cta-large:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 40px rgba(14, 165, 233, 0.7);
}

/* ==========================================================================
   用户评价跑马灯区 (Testimonials Marquee Section)
   ========================================================================== */
.marquee-container {
  overflow: hidden;
  width: 100%;
  position: relative;
  padding: 20px 0;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marquee-scroll 32s linear infinite;
}

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

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

.testimonial-card {
  width: 340px;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 24px;
  flex-shrink: 0;
  transition: all 0.3s ease;
}

.testimonial-card:hover {
  border-color: var(--bg-card-border-active);
  transform: translateY(-4px);
}

.stars-row {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
}

.star-icon {
  width: 16px;
  height: 16px;
  fill: #f59e0b;
}

.testimonial-text {
  font-size: 0.92rem;
  color: #cbd5e1;
  line-height: 1.6;
  margin-bottom: 18px;
}

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

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0284c7, #6366f1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #ffffff;
}

.user-info-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
}

.user-info-title {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ==========================================================================
   常见问题解答区 (FAQ Section)
   ========================================================================== */
.faq-accordion-wrap {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
}

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

.faq-summary {
  list-style: none;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  user-select: none;
}

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

.faq-icon-arrow {
  width: 20px;
  height: 20px;
  stroke: #38bdf8;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 24px 22px 24px;
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   页脚 (Footer)
   ========================================================================== */
.footer {
  background: #060910;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 48px 0 36px 0;
  text-align: center;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: #38bdf8;
}

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

/* ==========================================================================
   文章资讯页与独立子页专属样式 (Articles & Pages)
   ========================================================================== */
.page-header {
  padding-top: calc(var(--nav-height) + 48px);
  padding-bottom: 48px;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.page-title {
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 900;
  margin-bottom: 16px;
}

.page-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

.article-content-body {
  max-width: 860px;
  margin: 0 auto;
  padding: 64px 24px;
}

.article-item-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  margin-bottom: 64px;
  transition: all 0.3s ease;
}

.article-item-card:hover {
  border-color: var(--bg-card-border-active);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 18px;
}

.article-tag {
  background: rgba(14, 165, 233, 0.15);
  color: #38bdf8;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.article-title {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 24px;
  line-height: 1.4;
  color: #ffffff;
}

.article-prose {
  font-size: 1.02rem;
  color: #cbd5e1;
  line-height: 1.8;
}

.article-prose h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  margin: 32px 0 14px 0;
  border-left: 4px solid #38bdf8;
  padding-left: 12px;
}

.article-prose h4 {
  font-size: 1.15rem;
  font-weight: 600;
  color: #e2e8f0;
  margin: 24px 0 10px 0;
}

.article-prose p {
  margin-bottom: 18px;
}

.article-prose ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 20px;
}

.article-prose li {
  margin-bottom: 8px;
}

.article-prose a.dofollow-link {
  color: #38bdf8;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-prose a.dofollow-link:hover {
  color: #7dd3fc;
}

.article-prose a.internal-link {
  color: #10b981;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-prose a.internal-link:hover {
  color: #6ee7b7;
}

.callout-box {
  background: rgba(14, 165, 233, 0.08);
  border-left: 4px solid #0ea5e9;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 22px;
  margin: 24px 0;
}

.code-block {
  background: #070a12;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: #e2e8f0;
  overflow-x: auto;
  margin: 20px 0;
}

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

.table-custom {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  text-align: left;
}

.table-custom th, .table-custom td {
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.table-custom th {
  background: rgba(255, 255, 255, 0.04);
  color: #38bdf8;
  font-weight: 700;
}

.table-custom tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

/* ==========================================================================
   响应式媒体查询 (@media) - 确保手机端完美单栏自适应
   ========================================================================== */
@media (max-width: 1024px) {
  .features-grid, .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }

  .media-ai-card {
    grid-template-columns: 1fr;
  }

  .feature-split-row {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .feature-split-row.reverse {
    direction: ltr;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .section {
    padding: 64px 0;
  }

  .nav-links, .nav-cta-group {
    display: none;
  }

  .nav-toggle-label {
    display: flex;
  }

  /* 移动端汉堡抽屉菜单 (原生 CSS Checkbox 驱动) */
  .nav-toggle-input:checked ~ .nav-mobile-drawer {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-mobile-drawer {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(9, 13, 22, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px;
    gap: 18px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s ease-in-out;
    z-index: 999;
  }

  .nav-mobile-drawer .nav-link {
    font-size: 1.1rem;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-mobile-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 12px;
  }

  .nav-mobile-actions a {
    text-align: center;
    width: 100%;
    padding: 14px;
  }

  .hero-section {
    padding-top: calc(var(--nav-height) + 36px);
    padding-bottom: 64px;
  }

  .hero-stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 18px;
  }

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

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

  .btn-hero-primary, .btn-hero-secondary {
    width: 100%;
    justify-content: center;
  }

  .article-item-card {
    padding: 28px 20px;
  }

  .article-title {
    font-size: 1.4rem;
  }

  .footer-nav {
    gap: 20px;
  }
}