/* ====================================================================
   Now加速专线机场 - 全站 UI 视觉与动效样式表 (AG Specification 2026 v4.0)
   设计主题：【月下幽境 · 碧落萤火与幻蝶轻舞 (Nightfire Mirage · Phantom Butterfly & Ethereal Fireflies)】
   设计语言：唯美动漫幻想 + 高阶微晶玻璃质感 + 极速专线科技感
   性能优化：全原生 CSS3 + GPU 硬件加速 + 零 Web 字体开销 + 完善无障碍
   ==================================================================== */

:root {
  /* 系统原生字体栈 (零下载损耗，保障 LCP < 1.5s) */
  --font-family-base: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  /* 主题色系：幽夜空青、极光青碧、星芒淡金、微晶霜白 */
  --color-night-darkest: #060a12;
  --color-night-deep: #0b1322;
  --color-night-surface: #111b2e;
  --color-night-card: rgba(17, 27, 46, 0.78);
  --color-night-hover: rgba(26, 41, 70, 0.9);

  --color-aurora-cyan: #38bdf8;
  --color-aurora-teal: #14b8a6;
  --color-aurora-glow: #06b6d4;
  --color-starlight-gold: #fde047;
  --color-starlight-amber: #f59e0b;

  --color-text-bright: #f8fafc;
  --color-text-main: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-subtle: #64748b;

  --color-border-glass: rgba(56, 189, 248, 0.18);
  --color-border-hover: rgba(20, 184, 166, 0.5);
  --color-border-popular: rgba(56, 189, 248, 0.6);

  /* 幻彩流动主色阶 */
  --gradient-cta: linear-gradient(135deg, #0284c7 0%, #0d9488 50%, #10b981 100%);
  --gradient-cta-hover: linear-gradient(135deg, #0369a1 0%, #0f766e 50%, #059669 100%);
  --gradient-text-hero: linear-gradient(135deg, #ffffff 20%, #7dd3fc 60%, #5eead4 100%);
  --gradient-popular-border: linear-gradient(90deg, #38bdf8, #14b8a6, #fde047, #38bdf8);

  /* 光影景深 */
  --shadow-glow-cyan: 0 0 25px -4px rgba(56, 189, 248, 0.35);
  --shadow-glow-teal: 0 0 30px -4px rgba(20, 184, 166, 0.4);
  --shadow-card-elevated: 0 12px 36px -8px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(56, 189, 248, 0.12);
  --shadow-button: 0 4px 18px 0 rgba(14, 165, 233, 0.42);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  --max-width-content: 1160px;
  --max-width-article: 840px;
}

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

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

body {
  font-family: var(--font-family-base);
  background-color: var(--color-night-darkest);
  color: var(--color-text-main);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  /* 梦幻幽夜星芒与极光纹理底纹 */
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -15%, rgba(14, 165, 233, 0.22) 0%, transparent 65%),
    radial-gradient(ellipse 60% 40% at 90% 45%, rgba(20, 184, 166, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 10% 75%, rgba(2, 132, 199, 0.14) 0%, transparent 55%),
    linear-gradient(180deg, #070d18 0%, #0a1324 50%, #060a12 100%);
  background-attachment: fixed;
}

/* 焦点可见无障碍规范 */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-aurora-cyan);
  outline-offset: 3px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

/* 容器布局 */
.container {
  width: 100%;
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow {
  width: 100%;
  max-width: var(--max-width-article);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ====================================================================
   全屏氛围层：萤火虫灵动浮升特效 (Firefly Motes Ambient Canvas)
   纯 CSS3 GPU 硬件加速动画，零 CPU 压力
   ==================================================================== */
.ambient-fx-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.firefly-mote {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: radial-gradient(circle, #fde047 30%, #38bdf8 70%, transparent 100%);
  filter: drop-shadow(0 0 6px rgba(253, 224, 71, 0.85));
  opacity: 0;
  animation: fireflyFloat 14s infinite ease-in-out;
}

.firefly-mote:nth-child(1) { left: 12%; top: 85%; animation-duration: 16s; animation-delay: 0s; width: 5px; height: 5px; }
.firefly-mote:nth-child(2) { left: 28%; top: 92%; animation-duration: 19s; animation-delay: 2s; width: 3px; height: 3px; }
.firefly-mote:nth-child(3) { left: 45%; top: 78%; animation-duration: 15s; animation-delay: 4s; width: 4px; height: 4px; }
.firefly-mote:nth-child(4) { left: 63%; top: 88%; animation-duration: 18s; animation-delay: 1s; width: 6px; height: 6px; }
.firefly-mote:nth-child(5) { left: 78%; top: 82%; animation-duration: 21s; animation-delay: 5s; width: 3px; height: 3px; }
.firefly-mote:nth-child(6) { left: 91%; top: 90%; animation-duration: 14s; animation-delay: 3s; width: 4px; height: 4px; }
.firefly-mote:nth-child(7) { left: 5%; top: 70%; animation-duration: 17s; animation-delay: 6s; width: 3px; height: 3px; }

@keyframes fireflyFloat {
  0% {
    transform: translate3d(0, 0, 0) scale(0.6);
    opacity: 0;
  }
  20% {
    opacity: 0.85;
    transform: translate3d(15px, -60px, 0) scale(1.1);
  }
  50% {
    opacity: 0.4;
    transform: translate3d(-20px, -140px, 0) scale(0.8);
  }
  80% {
    opacity: 0.9;
    transform: translate3d(25px, -220px, 0) scale(1.2);
  }
  100% {
    transform: translate3d(-10px, -300px, 0) scale(0.4);
    opacity: 0;
  }
}

/* ====================================================================
   顶部导航栏 (Glassmorphism Nav with Aurora Glow)
   ==================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 19, 34, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-glass);
  transition: all 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(8, 14, 25, 0.92);
  border-bottom-color: rgba(56, 189, 248, 0.3);
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.6);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-text-bright);
  letter-spacing: -0.01em;
}

.brand-icon-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.6));
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.brand-logo:hover .brand-icon {
  transform: rotate(5deg) scale(1.08);
}

.brand-name-text {
  background: linear-gradient(135deg, #ffffff 0%, #bae6fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-aurora-cyan), var(--color-aurora-teal));
  transition: width 0.25s ease, left 0.25s ease;
  border-radius: 2px;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-aurora-cyan);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
  left: 0;
}

/* 导航 CTA 按钮 */
.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #ffffff;
  background: var(--gradient-cta);
  border-radius: var(--radius-sm);
  box-shadow: 0 0 14px -2px rgba(14, 165, 233, 0.45);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.nav-cta-btn:hover {
  background: var(--gradient-cta-hover);
  transform: translateY(-1px);
  box-shadow: 0 0 20px 0 rgba(20, 184, 166, 0.6);
  color: #ffffff;
}

.mobile-menu-btn {
  display: none;
  background: rgba(17, 27, 46, 0.6);
  border: 1px solid var(--color-border-glass);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  color: var(--color-text-main);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.mobile-menu-btn:hover {
  border-color: var(--color-aurora-cyan);
}

.mobile-nav-panel {
  display: none;
  background: rgba(11, 19, 34, 0.96);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-glass);
  padding: 1.25rem 1.5rem 1.5rem;
}

.mobile-nav-panel.is-active {
  display: block;
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.mobile-nav-links .nav-link {
  display: block;
  font-size: 1.0625rem;
  padding: 0.4rem 0;
}

.mobile-nav-cta {
  width: 100%;
  display: block;
  text-align: center;
  padding: 0.75rem;
  background: var(--gradient-cta);
  color: #ffffff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-button);
}

/* ====================================================================
   按钮体系：光泽扫过 (Shimmer Sweep) 与动态光晕
   ==================================================================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2.25rem;
  font-size: 1.0625rem;
  font-weight: 700;
  color: #ffffff;
  background: var(--gradient-cta);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-button), inset 0 1px 1px rgba(255, 255, 255, 0.3);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 按钮微光泽扫过动效 */
.btn-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-22deg);
  transition: none;
}

.btn-primary:hover::after {
  left: 140%;
  transition: left 0.75s ease-in-out;
}

.btn-primary:hover {
  background: var(--gradient-cta-hover);
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 28px -2px rgba(16, 185, 129, 0.55), 0 0 16px rgba(56, 189, 248, 0.5);
  color: #ffffff;
}

.btn-primary:active {
  transform: translateY(1px) scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text-bright);
  background: rgba(17, 27, 46, 0.7);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-md);
  transition: all 0.25s ease;
  cursor: pointer;
}

.btn-secondary:hover {
  background: rgba(26, 41, 70, 0.85);
  border-color: var(--color-aurora-cyan);
  box-shadow: 0 0 18px -4px rgba(56, 189, 248, 0.35);
  color: var(--color-aurora-cyan);
  transform: translateY(-2px);
}

/* ====================================================================
   Hero 区块：二次元灵境构图 + 矢量灵蝶航迹插画
   ==================================================================== */
.hero-section {
  position: relative;
  padding: 5rem 0 4.5rem;
  overflow: hidden;
  z-index: 1;
}

.hero-grid-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 3rem;
}

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

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.375rem 1rem;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-aurora-cyan);
  margin-bottom: 1.5rem;
  backdrop-filter: blur(8px);
  box-shadow: 0 0 14px -2px rgba(56, 189, 248, 0.2);
}

.pill-aurora-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 10px #22c55e;
  animation: pulseBeacon 2.2s infinite ease-in-out;
}

@keyframes pulseBeacon {
  0%, 100% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
  background: var(--gradient-text-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 14px rgba(56, 189, 248, 0.2));
}

.hero-subtitle {
  font-size: 1.1875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 2.25rem;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.hero-trust-badges {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.trust-badge-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4375rem;
  padding: 0.25rem 0.625rem;
  background: rgba(17, 27, 46, 0.5);
  border: 1px solid rgba(56, 189, 248, 0.1);
  border-radius: var(--radius-sm);
}

.trust-badge-icon {
  color: var(--color-aurora-teal);
}

/* Hero 右侧动漫灵境矢量罗盘插图 */
.hero-artwork-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.astral-compass-card {
  position: relative;
  width: 100%;
  max-width: 440px;
  background: rgba(17, 27, 46, 0.65);
  backdrop-filter: blur(14px);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-card-elevated);
  overflow: hidden;
  transition: transform 0.4s ease, border-color 0.4s ease;
}

.astral-compass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.4);
}

.compass-visual-svg {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 0 16px rgba(56, 189, 248, 0.35));
}

/* 灵蝶羽翼微动画 */
.butterfly-wing-left {
  transform-origin: center right;
  animation: flutterLeft 2.4s infinite ease-in-out;
}

.butterfly-wing-right {
  transform-origin: center left;
  animation: flutterRight 2.4s infinite ease-in-out;
}

@keyframes flutterLeft {
  0%, 100% { transform: scaleX(1) rotate(0deg); }
  50% { transform: scaleX(0.82) rotate(5deg); }
}

@keyframes flutterRight {
  0%, 100% { transform: scaleX(1) rotate(0deg); }
  50% { transform: scaleX(0.82) rotate(-5deg); }
}

.orbital-ring-outer {
  transform-origin: center;
  animation: spinSlow 36s linear infinite;
}

.orbital-ring-inner {
  transform-origin: center;
  animation: spinSlowReverse 24s linear infinite;
}

@keyframes spinSlow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes spinSlowReverse {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}

/* ====================================================================
   区块排版与通用模块
   ==================================================================== */
.section-wrapper {
  position: relative;
  padding: 5rem 0;
  z-index: 1;
}

.section-wrapper.bg-surface {
  background: rgba(11, 19, 34, 0.65);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--color-border-glass);
  border-bottom: 1px solid var(--color-border-glass);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-aurora-cyan);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 0.25rem 0.875rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.875rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--color-text-bright);
  margin-bottom: 0.875rem;
  letter-spacing: -0.015em;
}

.section-desc {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ====================================================================
   特性卡片 (4张) + 聚光灯跟随交互
   ==================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.feature-card {
  position: relative;
  background: var(--color-night-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-md);
  padding: 2rem 1.625rem;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), border-color 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
}

/* 聚光灯探照光晕层 (由 JS 计算 clientX/clientY 驱动) */
.feature-card::before {
  content: '';
  position: absolute;
  top: var(--spotlight-y, -100%);
  left: var(--spotlight-x, -100%);
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.16) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: 0 12px 30px -6px rgba(0, 0, 0, 0.6), var(--shadow-glow-cyan);
}

.feature-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(56, 189, 248, 0.14);
  border: 1px solid rgba(56, 189, 248, 0.28);
  color: var(--color-aurora-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  transition: transform 0.3s ease, color 0.3s ease;
}

.feature-card:hover .feature-icon-box {
  transform: scale(1.1);
  color: #ffffff;
  background: var(--gradient-cta);
}

.feature-title {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 0.625rem;
}

.feature-text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ====================================================================
   能力支持：流媒体与 AI 工具
   ==================================================================== */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.capability-card {
  background: var(--color-night-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.capability-card:hover {
  transform: translateY(-3px);
  border-color: rgba(20, 184, 166, 0.45);
}

.capability-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.capability-badge {
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.3125rem 0.625rem;
  border-radius: var(--radius-sm);
  background: rgba(20, 184, 166, 0.15);
  border: 1px solid rgba(20, 184, 166, 0.3);
  color: var(--color-aurora-teal);
}

.capability-card-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-text-bright);
}

.capability-card-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.capability-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

.capability-tag {
  font-size: 0.8125rem;
  background: rgba(17, 27, 46, 0.8);
  border: 1px solid rgba(56, 189, 248, 0.2);
  color: var(--color-aurora-cyan);
  padding: 0.3125rem 0.75rem;
  border-radius: var(--radius-pill);
  font-weight: 500;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.capability-card:hover .capability-tag {
  border-color: rgba(56, 189, 248, 0.4);
}

/* ====================================================================
   真实使用场景卡 (3张，非虚构评论)
   ==================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.scenario-card {
  background: var(--color-night-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.scenario-card:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 10px 28px -6px rgba(0, 0, 0, 0.5);
}

.scenario-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.scenario-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-bright);
}

.scenario-device {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.625rem;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.2);
  color: var(--color-aurora-cyan);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.scenario-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  flex-grow: 1;
}

/* ====================================================================
   定价体系：计费周期切换动画 + 炫彩发光边框
   ==================================================================== */
.billing-switcher-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin: 0 auto 3rem;
  max-width: 380px;
  background: rgba(17, 27, 46, 0.8);
  padding: 0.375rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-glass);
}

.billing-switch-btn {
  flex: 1;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.25s ease;
}

.billing-switch-btn.is-active {
  background: var(--gradient-cta);
  color: #ffffff;
  box-shadow: 0 2px 10px rgba(14, 165, 233, 0.4);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--color-night-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-elevated);
}

/* 推荐方案卡片：流动霓虹旋转边框 */
.pricing-card.is-popular {
  border: 1px solid transparent;
  background: linear-gradient(var(--color-night-deep), var(--color-night-deep)) padding-box,
              var(--gradient-popular-border) border-box;
  box-shadow: 0 12px 40px -8px rgba(0, 0, 0, 0.7), 0 0 24px -2px rgba(56, 189, 248, 0.3);
  transform: scale(1.03);
}

.pricing-card.is-popular:hover {
  transform: scale(1.05) translateY(-4px);
}

.popular-badge {
  position: absolute;
  top: -0.875rem;
  right: 2rem;
  background: var(--gradient-cta);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3125rem 0.875rem;
  border-radius: var(--radius-pill);
  letter-spacing: 0.03em;
  box-shadow: 0 0 12px rgba(20, 184, 166, 0.6);
}

.pricing-tier-name {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 0.5rem;
}

.pricing-tier-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  min-height: 2.6rem;
  line-height: 1.5;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border-glass);
}

.price-currency {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-aurora-cyan);
}

.price-amount {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-text-bright);
  line-height: 1;
}

.price-period {
  font-size: 0.875rem;
  color: var(--color-text-subtle);
  margin-left: 0.25rem;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.9375rem;
  margin-bottom: 2.25rem;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: var(--color-text-main);
  line-height: 1.45;
}

.pricing-feature-icon {
  width: 18px;
  height: 18px;
  color: var(--color-aurora-teal);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.pricing-btn {
  width: 100%;
}

/* ====================================================================
   FAQ 交互手风琴
   ==================================================================== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.125rem;
}

.faq-item {
  background: var(--color-night-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.faq-item:hover {
  border-color: rgba(56, 189, 248, 0.4);
}

.faq-question-btn {
  width: 100%;
  padding: 1.375rem 1.75rem;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-bright);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  color: var(--color-aurora-cyan);
}

.faq-item.is-open {
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 8px 24px -4px rgba(0, 0, 0, 0.5);
}

.faq-item.is-open .faq-icon {
  transform: rotate(180deg);
  color: var(--color-starlight-gold);
}

.faq-answer-panel {
  padding: 0 1.75rem 1.375rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  border-top: 1px solid transparent;
}

.faq-item:not(.is-open) .faq-answer-panel {
  display: none;
}

.faq-item.is-open .faq-answer-panel {
  border-top-color: var(--color-border-glass);
  padding-top: 1.125rem;
}

/* ====================================================================
   指南文章预览卡片
   ==================================================================== */
.guides-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.guide-preview-card {
  background: var(--color-night-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.guide-preview-card:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: 0 10px 24px -4px rgba(0, 0, 0, 0.5);
}

.guide-meta {
  font-size: 0.8125rem;
  color: var(--color-text-subtle);
  margin-bottom: 0.75rem;
  display: flex;
  gap: 0.75rem;
}

.guide-title {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 0.75rem;
  line-height: 1.45;
}

.guide-title a:hover {
  color: var(--color-aurora-cyan);
}

.guide-excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.guide-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-aurora-cyan);
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.guide-link:hover {
  color: var(--color-aurora-teal);
  text-decoration: underline;
}

/* ====================================================================
   Final CTA 区块
   ==================================================================== */
.final-cta-section {
  position: relative;
  padding: 5.5rem 0;
  text-align: center;
  overflow: hidden;
  border-top: 1px solid var(--color-border-glass);
}

.final-cta-inner {
  max-width: 720px;
  margin: 0 auto;
}

.final-cta-title {
  font-size: 2.375rem;
  font-weight: 800;
  color: var(--color-text-bright);
  margin-bottom: 1.125rem;
  background: var(--gradient-text-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.final-cta-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: 2.25rem;
  line-height: 1.7;
}

/* ====================================================================
   移动端吸底 CTA 栏
   ==================================================================== */
.mobile-sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background: rgba(11, 19, 34, 0.94);
  backdrop-filter: blur(16px);
  padding: 0.75rem 1.25rem;
  border-top: 1px solid var(--color-border-glass);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.6);
}

.mobile-sticky-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

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

.sticky-text {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-bright);
}

.sticky-sub {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.sticky-btn {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  flex-shrink: 0;
}

/* ====================================================================
   页脚规范 (包含合规联盟披露，无文章列表)
   ==================================================================== */
.site-footer {
  margin-top: auto;
  background: #060a12;
  border-top: 1px solid var(--color-border-glass);
  padding: 4rem 0 2.25rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.footer-brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text-bright);
  margin-bottom: 0.875rem;
}

.footer-brand-desc {
  line-height: 1.7;
  max-width: 360px;
}

.footer-col-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 1.125rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link:hover {
  color: var(--color-aurora-cyan);
}

.footer-disclaimer-box {
  padding: 1.25rem 1.5rem;
  background: rgba(17, 27, 46, 0.6);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-sm);
  margin-bottom: 2rem;
  font-size: 0.8125rem;
  color: var(--color-text-subtle);
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid rgba(56, 189, 248, 0.1);
  padding-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--color-text-subtle);
}

/* ====================================================================
   文章正文与合规页面排版
   ==================================================================== */
.article-header {
  padding: 4rem 0 2.5rem;
  border-bottom: 1px solid var(--color-border-glass);
  background: rgba(11, 19, 34, 0.5);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-subtle);
  margin-bottom: 1.25rem;
}

.breadcrumb-separator {
  color: var(--color-text-subtle);
}

.article-title {
  font-size: 2.375rem;
  font-weight: 800;
  color: var(--color-text-bright);
  line-height: 1.35;
  margin-bottom: 1.125rem;
  letter-spacing: -0.02em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.875rem;
  color: var(--color-text-subtle);
  flex-wrap: wrap;
}

.article-content {
  padding: 3rem 0 4.5rem;
}

.article-body {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text-main);
}

.article-body h2 {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin: 3rem 0 1.25rem;
  padding-bottom: 0.625rem;
  border-bottom: 1px solid var(--color-border-glass);
}

.article-body h3 {
  font-size: 1.3125rem;
  font-weight: 600;
  color: var(--color-text-bright);
  margin: 2rem 0 0.875rem;
}

.article-body p {
  margin-bottom: 1.375rem;
}

.article-body ul, .article-body ol {
  margin: 0 0 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.article-body a {
  color: var(--color-aurora-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-body a:hover {
  color: var(--color-aurora-teal);
}

.content-callout {
  padding: 1.375rem 1.625rem;
  background: rgba(56, 189, 248, 0.08);
  border-left: 4px solid var(--color-aurora-cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 2rem 0;
  font-size: 0.9375rem;
  color: var(--color-text-bright);
}

.content-callout strong {
  display: block;
  font-weight: 700;
  color: var(--color-aurora-cyan);
  margin-bottom: 0.375rem;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-md);
  background: rgba(17, 27, 46, 0.5);
}

.content-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9375rem;
}

.content-table th, .content-table td {
  padding: 0.875rem 1.125rem;
  border-bottom: 1px solid var(--color-border-glass);
}

.content-table th {
  background: rgba(11, 19, 34, 0.85);
  font-weight: 700;
  color: var(--color-text-bright);
}

.content-table tr:last-child td {
  border-bottom: none;
}

.article-end-cta {
  margin: 3.5rem 0;
  padding: 2.5rem 2rem;
  background: rgba(17, 27, 46, 0.8);
  backdrop-filter: blur(14px);
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-card-elevated);
}

.article-end-cta-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 0.625rem;
}

.article-end-cta-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.related-posts-section {
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid var(--color-border-glass);
}

.related-posts-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 1.5rem;
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.related-post-card {
  padding: 1.5rem;
  background: var(--color-night-card);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-sm);
  transition: all 0.25s ease;
}

.related-post-card:hover {
  border-color: var(--color-aurora-cyan);
  transform: translateY(-2px);
}

.related-post-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text-bright);
  margin-bottom: 0.5rem;
}

.related-post-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* 法律合规页面 */
.legal-page-header {
  padding: 4rem 0 2.5rem;
  background: rgba(11, 19, 34, 0.6);
  border-bottom: 1px solid var(--color-border-glass);
  text-align: center;
}

.legal-title {
  font-size: 2.375rem;
  font-weight: 800;
  color: var(--color-text-bright);
  margin-bottom: 0.625rem;
}

.legal-updated {
  font-size: 0.875rem;
  color: var(--color-text-subtle);
}

.legal-body {
  padding: 3.5rem 0;
  max-width: 820px;
  margin: 0 auto;
}

.legal-section {
  margin-bottom: 2.75rem;
}

.legal-section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 1.125rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border-glass);
}

.legal-section p {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--color-text-main);
  margin-bottom: 1.125rem;
}

.legal-section ul {
  margin: 0 0 1.25rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: var(--color-text-main);
}

/* 网站地图卡片 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin: 3rem 0;
}

.sitemap-card {
  background: var(--color-night-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
}

.sitemap-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 1.25rem;
  padding-bottom: 0.625rem;
  border-bottom: 1px solid var(--color-border-glass);
}

.sitemap-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.sitemap-item a {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.sitemap-item a:hover {
  color: var(--color-aurora-cyan);
  text-decoration: underline;
}

/* ====================================================================
   响应式断点与无障碍动画降级
   ==================================================================== */
@media (max-width: 1024px) {
  .hero-grid-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-content {
    text-align: center;
  }
  .hero-subtitle {
    margin: 0 auto 2rem;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .hero-trust-badges {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }
  .footer-top {
    grid-template-columns: 1.5fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .nav-desktop {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .hero-title {
    font-size: 2.125rem;
  }
  .hero-subtitle {
    font-size: 1.0625rem;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta-group .btn-primary,
  .hero-cta-group .btn-secondary {
    width: 100%;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .capabilities-grid {
    grid-template-columns: 1fr;
  }
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 440px;
    margin: 0 auto;
  }
  .pricing-card.is-popular {
    transform: none;
  }
  .guides-preview-grid {
    grid-template-columns: 1fr;
  }
  .related-posts-grid {
    grid-template-columns: 1fr;
  }
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .mobile-sticky-cta {
    display: block;
  }
  body {
    padding-bottom: 5rem;
  }
}

/* 无障碍：减少动效模式 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .firefly-mote {
    display: none;
  }
}