/* ==========================================================================
   飞鸟云 (iflyingbird.xyz) - 极速代理/网络加速服务官网样式
   设计风格：动漫科技风 (Cyber Anime Aesthetic), 霓虹发光, 动态图卡, 极速响应
   ========================================================================== */

/* 1. CSS 变量与设计规范 */
:root {
  --bg-dark: #0a0915;
  --bg-card: rgba(20, 18, 40, 0.7);
  --bg-card-hover: rgba(35, 30, 68, 0.9);
  --border-color: rgba(236, 72, 153, 0.15);
  --border-color-hover: rgba(236, 72, 153, 0.5);
  
  --primary-gradient: linear-gradient(135deg, #ec4899 0%, #8b5cf6 50%, #06b6d4 100%);
  --btn-gradient: linear-gradient(135deg, #d946ef 0%, #8b5cf6 100%);
  --btn-gradient-hover: linear-gradient(135deg, #f43f5e 0%, #a855f7 100%);
  
  --anime-pink: #ec4899;
  --anime-purple: #a855f7;
  --anime-cyan: #06b6d4;
  --anime-yellow: #fbbf24;
  --accent-green: #10b981;
  
  --text-main: #ffffff;
  --text-muted: #c4b5fd;
  --text-dim: #8b5cf6;
  
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-full: 9999px;
  
  --shadow-glow: 0 0 30px rgba(236, 72, 153, 0.3);
  --shadow-card: 0 20px 40px -15px rgba(0, 0, 0, 0.7);
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* 2. 基础重置与排版 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(236, 72, 153, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 60%, rgba(139, 92, 246, 0.1) 0%, transparent 45%);
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

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

/* 动漫二次元闪耀星芒背景 */
.glow-bg {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.2) 0%, rgba(139, 92, 246, 0.15) 35%, rgba(10, 9, 21, 0) 70%);
  filter: blur(90px);
  z-index: 0;
  pointer-events: none;
}

.glow-bg-secondary {
  position: absolute;
  bottom: 5%;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, rgba(10, 9, 21, 0) 70%);
  filter: blur(100px);
  z-index: 0;
  pointer-events: none;
}

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

/* 3. 导航栏 Header */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 9, 21, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 10px rgba(236, 72, 153, 0.3));
}

.logo-icon {
  width: 36px;
  height: 36px;
}

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

.nav-link {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 600;
  transition: all 0.3s ease;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-link:hover {
  color: #ffffff;
}

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

.nav-link.badge-link {
  color: var(--anime-yellow);
}

/* 按钮通用规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 700;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border: none;
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--btn-gradient);
  color: #ffffff;
  box-shadow: 0 4px 25px rgba(217, 70, 239, 0.45);
}

.btn-primary:hover {
  background: var(--btn-gradient-hover);
  box-shadow: 0 6px 35px rgba(244, 63, 94, 0.65);
  transform: translateY(-3px);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  background: rgba(236, 72, 153, 0.15);
  border-color: var(--anime-pink);
  transform: translateY(-3px);
}

.btn-recommend {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.18) 0%, rgba(236, 72, 153, 0.18) 100%);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.5);
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.2);
}

.btn-recommend:hover {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.35) 0%, rgba(236, 72, 153, 0.35) 100%);
  border-color: rgba(245, 158, 11, 0.9);
  color: #ffffff;
  box-shadow: 0 6px 30px rgba(245, 158, 11, 0.4);
  transform: translateY(-3px);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

/* 4. Hero 主视觉区 - 左右分栏 + 动漫风格动效 */
.hero {
  padding: 80px 0 60px;
  position: relative;
}

.hero-flex-container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: rgba(236, 72, 153, 0.12);
  border: 1px solid rgba(236, 72, 153, 0.3);
  color: #f472b6;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--anime-pink);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--anime-pink);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
  100% { opacity: 1; transform: scale(1); }
}

.hero-title {
  font-size: 3.3rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -1px;
  margin-bottom: 24px;
}

.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 15px rgba(236, 72, 153, 0.2));
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  font-weight: 400;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
}

.stat-item h4 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 2px;
}

.stat-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 动漫风右侧动态图卡视觉区 (Anime Dynamic Cards Visual) */
.hero-anime-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: center;
  justify-content: center;
}

/* 二次元光轮光背景 */
.anime-magic-circle {
  position: absolute;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  border: 2px dashed rgba(236, 72, 153, 0.35);
  box-shadow: 0 0 60px rgba(139, 92, 246, 0.2);
  animation: rotateCircle 25s linear infinite;
  z-index: 0;
  pointer-events: none;
}

.anime-magic-circle::before {
  content: '';
  position: absolute;
  inset: 20px;
  border-radius: 50%;
  border: 1px solid rgba(6, 182, 212, 0.3);
}

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

/* 3 个漂浮动漫图卡 */
.anime-float-card {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 380px;
  background: rgba(25, 21, 52, 0.85);
  border: 1px solid rgba(236, 72, 153, 0.3);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all 0.3s ease;
}

.anime-float-card.card-1 {
  animation: floatAnim 4s ease-in-out infinite;
  border-left: 4px solid var(--anime-pink);
}

.anime-float-card.card-2 {
  animation: floatAnim 4.5s ease-in-out 0.8s infinite;
  margin-left: 30px;
  border-left: 4px solid var(--anime-cyan);
}

.anime-float-card.card-3 {
  animation: floatAnim 3.8s ease-in-out 1.5s infinite;
  border-left: 4px solid var(--anime-yellow);
}

@keyframes floatAnim {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.anime-float-card:hover {
  transform: scale(1.04) translateY(-5px);
  border-color: var(--anime-pink);
  box-shadow: var(--shadow-glow);
}

.anime-card-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(236, 72, 153, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.anime-card-info h5 {
  font-size: 1.02rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 2px;
}

.anime-card-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 5. 通用 Section 标头 */
.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 56px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* 6. 产品核心优势 (3个图文卡片) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 26px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  background: var(--bg-card-hover);
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-glow);
}

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

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: rgba(236, 72, 153, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--anime-pink);
}

.feature-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 7. 流媒体与 AI 支持图卡 */
.media-ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
}

.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 20px;
  margin-top: 36px;
}

.media-tag {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  transition: all 0.3s ease;
}

.media-tag:hover {
  background: rgba(236, 72, 153, 0.1);
  border-color: var(--anime-pink);
  transform: scale(1.05);
}

.media-icon {
  width: 36px;
  height: 36px;
}

.media-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}

/* 8. 套餐价格对比表 (参考真实机场套餐价格) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
}

.price-card.popular {
  border-color: var(--anime-pink);
  background: rgba(28, 22, 58, 0.9);
  box-shadow: 0 0 35px rgba(236, 72, 153, 0.3);
  transform: translateY(-8px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--btn-gradient);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.price-header h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.price-header p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.price-amount {
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 1.2rem;
}

.price-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
}

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

.price-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.check-icon {
  width: 16px;
  height: 16px;
  color: var(--accent-green);
  flex-shrink: 0;
}

.price-card .btn {
  width: 100%;
}

/* 9. 常见问题解答 FAQ */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 28px;
}

.faq-question {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.faq-icon {
  color: var(--anime-pink);
  font-weight: 800;
}

.faq-answer {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 10. 用户评价 Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-content {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  font-style: italic;
}

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

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  font-size: 0.95rem;
  box-shadow: 0 0 12px rgba(236, 72, 153, 0.4);
}

.author-info h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.author-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 11. 页脚 Footer - 严格保留四大标题入口 */
.footer {
  border-top: 1px solid var(--border-color);
  background: rgba(6, 5, 15, 0.95);
  padding: 60px 0 40px;
  margin-top: 60px;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
  margin-bottom: 40px;
}

.footer-nav-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px 16px;
  transition: all 0.3s ease;
}

.footer-nav-item:hover {
  background: rgba(236, 72, 153, 0.08);
  border-color: var(--border-color-hover);
  transform: translateY(-4px);
}

.footer-nav-link {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* 独立子页通用排版样式 */
.page-header {
  padding: 60px 0 30px;
  text-align: center;
}

.page-title {
  font-size: 2.8rem;
  font-weight: 900;
  margin-bottom: 12px;
}

.page-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  margin-bottom: 60px;
  line-height: 1.8;
}

.page-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

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

.page-content p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 1rem;
}

.page-content ul {
  margin-bottom: 24px;
  padding-left: 20px;
}

.page-content li {
  color: var(--text-muted);
  margin-bottom: 10px;
  list-style: disc;
}

.back-home {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--anime-pink);
  font-weight: 600;
  margin-bottom: 24px;
  transition: opacity 0.2s ease;
}

.back-home:hover {
  opacity: 0.8;
}

/* 资讯文章卡片网格 */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.news-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all 0.3s ease;
}

.news-card:hover {
  background: rgba(236, 72, 153, 0.08);
  border-color: var(--anime-pink);
  transform: translateY(-4px);
}

.news-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.news-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.news-card .news-date {
  font-size: 0.78rem;
  color: var(--anime-pink);
  font-weight: 600;
}

/* 12. 响应式适配与移动端单栏适配 (@media) */
@media (max-width: 1024px) {
  .hero-flex-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-text-content {
    text-align: center;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .hero-anime-visual {
    margin-top: 20px;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-nav {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .nav-links {
    display: none;
  }

  .hero {
    padding: 40px 0 30px;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .hero-subtitle {
    font-size: 0.98rem;
  }
  
  /* 移动端手指点击大按钮，宽度100% */
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  .hero-cta-group .btn {
    width: 100%;
    min-height: 52px;
    font-size: 1.05rem;
  }

  .anime-float-card.card-2 {
    margin-left: 0;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .features-grid, .pricing-grid, .faq-grid, .testimonials-grid, .footer-nav, .news-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .price-card.popular {
    transform: none;
  }
  
  .price-card .btn {
    min-height: 48px;
  }

  .page-content {
    padding: 20px 16px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }
  .anime-magic-circle {
    width: 280px;
    height: 280px;
  }
}