/* ==========================================================================
   瞬云机场 (shunyunjc.cyou) - 2026 全球自营纯血 IEPL 超音速专线网络
   视觉语言：未来航空航天 · 极速星云穿梭 · 钛金银辉与量子天青 (AeroSpace Nebula & Titanium Azure)
   ========================================================================== */

:root {
  --bg-cosmos: #030712;
  --bg-deep: #070e1e;
  --bg-card: rgba(11, 23, 46, 0.72);
  --bg-card-hover: rgba(15, 31, 60, 0.88);
  
  --azure-glow: #38bdf8;
  --azure-core: #0ea5e9;
  --azure-deep: #0284c7;
  --azure-ice: #e0f2fe;
  
  --titanium-light: #ffffff;
  --titanium-silver: #e2e8f0;
  --titanium-muted: #94a3b8;
  --titanium-dim: #64748b;
  
  --afterburner-orange: #f97316;
  --afterburner-gold: #fbbf24;
  
  --border-hud: rgba(56, 189, 248, 0.22);
  --border-light: rgba(255, 255, 255, 0.08);
  --border-active: rgba(56, 189, 248, 0.65);
  
  --shadow-thruster: 0 10px 30px -5px rgba(14, 165, 233, 0.45);
  --shadow-card: 0 16px 40px rgba(0, 0, 0, 0.55);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-cosmos);
  color: var(--titanium-light);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* 航天深空星云动态背景与光轨 */
.bg-aerospace {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.nebula-blob-1 {
  position: absolute;
  top: -15%;
  right: 15%;
  width: 750px;
  height: 650px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.16) 0%, rgba(2, 132, 199, 0.08) 50%, transparent 75%);
  filter: blur(85px);
  animation: floatNebula 20s ease-in-out infinite alternate;
}

.nebula-blob-2 {
  position: absolute;
  top: 40%;
  left: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.14) 0%, rgba(3, 105, 161, 0.05) 50%, transparent 75%);
  filter: blur(95px);
  animation: floatNebula 25s ease-in-out infinite alternate-reverse;
}

.nebula-blob-3 {
  position: absolute;
  bottom: -10%;
  right: -5%;
  width: 800px;
  height: 700px;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.08) 0%, rgba(2, 132, 199, 0.06) 50%, transparent 80%);
  filter: blur(90px);
}

.aerospace-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(56, 189, 248, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 50% 30%, black 40%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 40%, transparent 85%);
}

@keyframes floatNebula {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-50px, 40px) scale(1.06); }
  100% { transform: translate(40px, -60px) scale(0.96); }
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* 顶部航天专线公告栏 */
.top-notice-bar {
  background: linear-gradient(90deg, rgba(2, 132, 199, 0.95), rgba(14, 165, 233, 0.9), rgba(249, 115, 22, 0.85));
  border-bottom: 1px solid rgba(56, 189, 248, 0.4);
  padding: 9px 16px;
  font-size: 0.88rem;
  color: #ffffff;
  text-align: center;
  position: relative;
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

.top-notice-bar a {
  color: #fef08a;
  font-weight: 700;
  text-decoration: underline;
  transition: color 0.2s;
}

.top-notice-bar a:hover {
  color: #ffffff;
}

/* 导航栏 - 钛金航天透明悬浮 */
.navbar-wrapper {
  position: sticky;
  top: 0;
  z-index: 99;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(3, 7, 18, 0.82);
  border-bottom: 1px solid var(--border-hud);
  transition: all 0.3s;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  filter: drop-shadow(0 4px 12px rgba(56, 189, 248, 0.5));
}

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

.brand-title {
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.brand-title .highlight {
  background: linear-gradient(135deg, #38bdf8, #67e8f9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-left: 4px;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--azure-glow);
  letter-spacing: 1px;
  font-weight: 600;
  text-transform: uppercase;
}

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

.nav-links a {
  color: var(--titanium-silver);
  text-decoration: none;
  font-size: 0.94rem;
  font-weight: 500;
  transition: all 0.2s;
  position: relative;
}

.nav-links a:hover {
  color: var(--azure-glow);
}

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

/* 航天级按钮规范 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 60%, #38bdf8 100%);
  color: #ffffff;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.94rem;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: var(--shadow-thruster);
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(14, 165, 233, 0.6);
  filter: brightness(1.1);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--titanium-silver);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.94rem;
  text-decoration: none;
  border: 1px solid var(--border-hud);
  backdrop-filter: blur(10px);
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--azure-glow);
  color: #ffffff;
  transform: translateY(-1px);
}

/* Hero 首屏区 */
.hero-section {
  padding: 85px 0 65px;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--azure-glow);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 24px;
  box-shadow: 0 0 20px rgba(14, 165, 233, 0.18);
}

.hero-pill .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 10px #38bdf8;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; box-shadow: 0 0 14px #38bdf8; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 3.3rem;
  font-weight: 900;
  line-height: 1.22;
  margin-bottom: 22px;
  letter-spacing: -1px;
}

.hero-title .title-gradient {
  background: linear-gradient(135deg, #ffffff 25%, #38bdf8 65%, #67e8f9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  max-width: 820px;
  margin: 0 auto 36px;
  font-size: 1.15rem;
  color: var(--titanium-muted);
  line-height: 1.8;
}

.hero-desc strong {
  color: var(--azure-glow);
}

.hero-cta-group {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 50px;
}

.hero-cta-group .btn-primary {
  padding: 14px 34px;
  font-size: 1.05rem;
}

.hero-cta-group .btn-secondary {
  padding: 14px 28px;
  font-size: 1.05rem;
}

/* 航天遥测指标徽章 (超音速起飞指标) */
.hero-telemetry {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.telemetry-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(11, 23, 46, 0.65);
  border: 1px solid var(--border-hud);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  color: var(--titanium-silver);
}

.telemetry-badge svg {
  color: var(--azure-glow);
}

/* 核心特性网格 (4大维度) */
.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 54px;
}

.section-tag {
  color: var(--azure-glow);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--titanium-muted);
  max-width: 650px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hud);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

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

.feature-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--border-active);
  box-shadow: 0 20px 40px rgba(2, 132, 199, 0.3);
}

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

.feature-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
  color: var(--azure-glow);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--titanium-muted);
  line-height: 1.7;
}

/* 瞬云全球航线雷达监控面板 */
.radar-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-hud);
  border-radius: var(--radius-xl);
  padding: 36px;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
  margin-bottom: 60px;
}

.radar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}

.radar-title {
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.radar-live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(14, 165, 233, 0.15);
  color: var(--azure-glow);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
}

.radar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.radar-node-card {
  background: rgba(3, 7, 18, 0.65);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.25s;
}

.radar-node-card:hover {
  border-color: var(--border-active);
  transform: translateY(-2px);
  background: rgba(2, 132, 199, 0.18);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.node-flag {
  font-size: 24px;
}

.node-name {
  font-weight: 700;
  font-size: 0.98rem;
  color: #ffffff;
}

.node-type {
  font-size: 0.75rem;
  color: var(--azure-glow);
}

.node-metrics {
  text-align: right;
}

.node-ping {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--azure-glow);
}

.node-rate {
  font-size: 0.75rem;
  color: var(--titanium-dim);
}

/* 场景选型推荐 (8K蓝光航线 / 硅谷AI超音速 / 极客跨国科研) */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hud);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(20px);
  transition: all 0.3s;
}

.scenario-card:hover {
  transform: translateY(-5px);
  border-color: var(--azure-glow);
}

.scenario-badge {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--afterburner-gold);
  background: rgba(245, 158, 11, 0.12);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 14px;
}

.scenario-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #fff;
}

.scenario-desc {
  font-size: 0.92rem;
  color: var(--titanium-muted);
  line-height: 1.75;
  margin-bottom: 20px;
}

.scenario-features {
  list-style: none;
  font-size: 0.88rem;
  color: var(--titanium-silver);
}

.scenario-features li {
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.scenario-features li svg {
  color: var(--azure-glow);
  flex-shrink: 0;
}

/* 瞬云专线套餐矩阵 (4大层级) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hud);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(20px);
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card.featured {
  border-color: var(--azure-glow);
  background: linear-gradient(180deg, rgba(2, 132, 199, 0.4) 0%, rgba(11, 23, 46, 0.88) 100%);
  box-shadow: 0 20px 45px rgba(2, 132, 199, 0.35);
  transform: scale(1.03);
  z-index: 2;
}

.featured-pill {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #0ea5e9, #f97316);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.4);
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: #ffffff;
}

.plan-sub {
  font-size: 0.82rem;
  color: var(--titanium-dim);
  margin-bottom: 20px;
  min-height: 38px;
}

.plan-price-box {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}

.plan-price {
  font-size: 2.4rem;
  font-weight: 900;
  color: #ffffff;
}

.plan-price .currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--azure-glow);
}

.plan-price .period {
  font-size: 0.9rem;
  color: var(--titanium-muted);
  font-weight: 500;
}

.plan-features {
  list-style: none;
  font-size: 0.88rem;
  color: var(--titanium-silver);
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-features li {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-features li svg {
  color: var(--azure-glow);
  flex-shrink: 0;
}

.pricing-card .btn-primary,
.pricing-card .btn-secondary {
  width: 100%;
}

/* 客户端一键配置卡片 */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hud);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: all 0.25s;
}

.client-card:hover {
  border-color: var(--azure-glow);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.client-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.client-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: #fff;
}

.client-os {
  font-size: 0.8rem;
  color: var(--azure-glow);
  margin-bottom: 14px;
}

.client-btn {
  display: inline-block;
  font-size: 0.82rem;
  color: #ffffff;
  background: rgba(14, 165, 233, 0.18);
  border: 1px solid var(--border-hud);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s;
}

.client-btn:hover {
  background: var(--azure-core);
  color: #ffffff;
}

/* 常见问答 FAQ */
.faq-grid {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-hud);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  transition: all 0.2s;
}

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

.faq-q {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-q::before {
  content: "Q";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: rgba(14, 165, 233, 0.2);
  color: var(--azure-glow);
  font-size: 0.8rem;
  border-radius: 6px;
  font-weight: 800;
}

.faq-a {
  font-size: 0.94rem;
  color: var(--titanium-muted);
  line-height: 1.8;
  padding-left: 34px;
}

/* 页脚 Footer */
.site-footer {
  background: #02040a;
  border-top: 1px solid var(--border-hud);
  padding: 60px 0 30px;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--titanium-muted);
  line-height: 1.75;
  margin: 16px 0 20px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: var(--titanium-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--azure-glow);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--border-light);
  font-size: 0.82rem;
  color: var(--titanium-dim);
}

.footer-bottom a {
  color: var(--azure-glow);
  text-decoration: none;
}

/* 响应式调整 */
@media (max-width: 1024px) {
  .features-grid, .pricing-grid, .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .radar-grid, .scenarios-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card.featured {
    transform: none;
  }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero-title { font-size: 2.2rem; }
  .features-grid, .pricing-grid, .clients-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}