/* ==========================================================================
   库洛米 (Kuromi) - 全球化网络加速服务 样式文件
   Design: Modern Cosmic Dark Glassmorphic Theme with Pink/Violet & Gold Accents
   ========================================================================== */

:root {
  --bg-dark: #0b0726;
  --bg-card: rgba(23, 16, 58, 0.65);
  --bg-card-hover: rgba(36, 25, 87, 0.8);
  --border-glass: rgba(255, 255, 255, 0.12);
  --border-glow: rgba(224, 66, 193, 0.4);
  
  --primary-pink: #e042c1;
  --primary-purple: #8e24aa;
  --gradient-btn: linear-gradient(135deg, #e53995 0%, #a838f3 100%);
  --gradient-btn-hover: linear-gradient(135deg, #f04ab1 0%, #b84dfd 100%);
  --gradient-gold: linear-gradient(135deg, #ffb703 0%, #fb8500 100%);
  
  --text-main: #ffffff;
  --text-sub: #c3c7eb;
  --text-gold: #ffb703;
  --text-pink: #f48fb1;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --container-max: 1200px;
}

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

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;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(142, 36, 170, 0.25) 0%, transparent 40%),
    radial-gradient(circle at 85% 60%, rgba(224, 66, 193, 0.2) 0%, transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(255, 183, 3, 0.1) 0%, transparent 50%);
  background-attachment: fixed;
}

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

/* 头部 Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(11, 7, 38, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

/* 左上角 Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  transition: transform 0.2s ease;
}

.logo:hover {
  transform: scale(1.05);
}

.logo-text {
  font-family: "Georgia", serif;
  font-style: italic;
  font-size: 1.6rem;
  font-weight: 700;
  background: linear-gradient(135deg, #fff 30%, var(--text-pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}

.logo-subtext {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  background: none;
  -webkit-text-fill-color: var(--text-main);
}

/* 导航链接 */
.nav-menu {
  display: flex;
  gap: 25px;
  align-items: center;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--text-sub);
  transition: var(--transition);
  position: relative;
  padding: 4px 0;
}

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

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

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

.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background: var(--gradient-btn);
  color: #ffffff !important;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 50px;
  box-shadow: 0 4px 20px rgba(229, 57, 149, 0.4);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn-cta:hover {
  background: var(--gradient-btn-hover);
  box-shadow: 0 6px 28px rgba(229, 57, 149, 0.6);
  transform: translateY(-2px);
}

.btn-cta-secondary {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(224, 66, 193, 0.5);
  color: #ffffff !important;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-cta-secondary:hover {
  background: rgba(224, 66, 193, 0.2);
  border-color: var(--primary-pink);
  box-shadow: 0 6px 22px rgba(224, 66, 193, 0.4);
  transform: translateY(-2px);
}

/* 主视觉 Hero 区域 */
.hero-section {
  min-height: 100vh;
  padding-top: 120px;
  padding-bottom: 80px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.brand-tag {
  display: inline-block;
  font-size: 1.8rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  color: #ffffff;
}

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

.hero-subtitle {
  font-size: 1.35rem;
  color: var(--text-sub);
  margin-bottom: 35px;
  font-weight: 400;
}

.hero-subtitle strong {
  color: var(--text-gold);
  font-weight: 700;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* 动态火箭和星空卡片 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.rocket-card-wrap {
  width: 100%;
  max-width: 480px;
  height: 400px;
  position: relative;
  border-radius: 24px;
  background: radial-gradient(circle at 70% 30%, rgba(142, 36, 170, 0.3), rgba(11, 7, 38, 0.9));
  border: 1px solid var(--border-glass);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), inset 0 0 30px rgba(224, 66, 193, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.rocket-svg {
  width: 280px;
  height: 280px;
  filter: drop-shadow(0 10px 25px rgba(229, 57, 149, 0.5));
  animation: floatRocket 4s ease-in-out infinite alternate;
}

@keyframes floatRocket {
  0% {
    transform: translateY(0px) rotate(0deg);
  }
  100% {
    transform: translateY(-18px) rotate(-3deg);
  }
}

.stars-bg {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
  background-image: 
    radial-gradient(2px 2px at 20px 30px, #fff, rgba(0,0,0,0)),
    radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.8), rgba(0,0,0,0)),
    radial-gradient(3px 3px at 150px 160px, var(--text-gold), rgba(0,0,0,0)),
    radial-gradient(2px 2px at 280px 90px, #fff, rgba(0,0,0,0)),
    radial-gradient(2px 2px at 320px 240px, var(--primary-pink), rgba(0,0,0,0));
  animation: starsGlow 3s ease-in-out infinite alternate;
}

@keyframes starsGlow {
  0% { opacity: 0.5; }
  100% { opacity: 1; }
}

/* 核心优势板块 */
.section-padding {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 50px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #ffffff;
}

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

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 35px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
  box-shadow: 0 15px 35px rgba(224, 66, 193, 0.25);
}

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(224, 66, 193, 0.2), rgba(142, 36, 170, 0.3));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--primary-pink);
  margin-bottom: 22px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.feature-card h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: #ffffff;
}

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

/* 流媒体与 AI 支持图卡 */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.media-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 18px;
  transition: var(--transition);
}

.media-card:hover {
  border-color: var(--primary-pink);
  transform: translateY(-4px);
  background: rgba(40, 25, 95, 0.7);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.media-badge-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.media-card-info h4 {
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 4px;
}

.media-card-info p {
  font-size: 0.85rem;
  color: var(--text-sub);
}

/* 套餐价格对比表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 22px;
  padding: 35px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(12px);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary-pink);
  box-shadow: 0 18px 40px rgba(142, 36, 170, 0.3);
}

.pricing-card.popular {
  border: 2px solid var(--primary-pink);
  background: linear-gradient(180deg, rgba(45, 18, 100, 0.8) 0%, rgba(23, 16, 58, 0.9) 100%);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-btn);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 20px;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(229, 57, 149, 0.4);
}

.pricing-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.pricing-price {
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 20px;
}

.pricing-price span {
  font-size: 0.9rem;
  color: var(--text-sub);
  font-weight: 400;
}

.pricing-features {
  margin-bottom: 30px;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.9rem;
  color: var(--text-sub);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-features li::before {
  content: '✓';
  color: var(--primary-pink);
  font-weight: bold;
}

/* 12篇 SEO 文章卡片区域 */
.seo-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
  margin-top: 30px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 18px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 183, 3, 0.5);
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}

.article-tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 10px;
  background: rgba(224, 66, 193, 0.2);
  color: var(--text-pink);
  margin-bottom: 12px;
  width: fit-content;
}

.article-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 10px;
  line-height: 1.4;
}

.article-snippet {
  font-size: 0.88rem;
  color: var(--text-sub);
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn-read-more {
  font-size: 0.85rem;
  color: var(--text-gold);
  background: none;
  border: 1px solid rgba(255, 183, 3, 0.3);
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition);
}

.btn-read-more:hover {
  background: rgba(255, 183, 3, 0.15);
  border-color: var(--text-gold);
}

/* FAQ 常见问题解答 */
.faq-grid {
  max-width: 850px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary-pink);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
  content: '-';
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  background: rgba(11, 7, 38, 0.4);
}

.faq-answer-content {
  padding: 0 24px 20px;
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  transition: max-height 0.5s ease-in-out;
}

/* 用户评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 18px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stars {
  color: var(--text-gold);
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-sub);
  margin-bottom: 20px;
  font-style: italic;
}

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

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-pink), var(--primary-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
}

.user-details h5 {
  font-size: 0.95rem;
  color: #fff;
}

.user-details span {
  font-size: 0.8rem;
  color: var(--text-sub);
}

/* 页脚 Footer */
.site-footer {
  background: #060417;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 60px 0 30px;
}

.footer-nav-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-bottom: 40px;
  text-align: center;
}

.footer-nav-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  cursor: pointer;
  padding: 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  transition: var(--transition);
}

.footer-nav-title:hover {
  border-color: var(--primary-pink);
  color: var(--text-pink);
  background: rgba(224, 66, 193, 0.15);
  transform: translateY(-3px);
}

/* PBN 友好链接与版权行 */
.footer-pbn-section {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.pbn-links {
  margin-bottom: 12px;
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.pbn-link {
  color: var(--text-gold);
  font-size: 0.92rem;
  font-weight: 600;
  transition: var(--transition);
}

.pbn-link:hover {
  color: #ffffff;
  text-decoration: underline;
}

.copyright-text {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

/* 右侧悬浮章节上下移动按钮 */
.section-nav-widget {
  position: fixed;
  right: 25px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 999;
}

.nav-arrow-btn {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(23, 16, 58, 0.85);
  border: 1px solid var(--primary-pink);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
  transition: var(--transition);
  backdrop-filter: blur(8px);
}

.nav-arrow-btn:hover {
  background: var(--gradient-btn);
  transform: scale(1.15);
  box-shadow: 0 6px 20px rgba(229, 57, 149, 0.6);
}

.nav-arrow-btn:active {
  transform: scale(0.95);
}

/* 模态框 Modal (关于我们, 服务条款, 隐私政策, 网站地图, SEO文章正文) */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(6, 4, 23, 0.85);
  backdrop-filter: blur(12px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 20px;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: #110c33;
  border: 1px solid var(--primary-pink);
  border-radius: 24px;
  width: 100%;
  max-width: 800px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 35px;
  position: relative;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8);
  color: var(--text-sub);
}

.modal-content h2 {
  font-size: 1.8rem;
  color: #ffffff;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 12px;
}

.modal-content h3 {
  font-size: 1.25rem;
  color: var(--text-gold);
  margin: 20px 0 10px;
}

.modal-content p {
  margin-bottom: 14px;
  line-height: 1.7;
  font-size: 0.95rem;
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--primary-pink);
  transform: rotate(90deg);
}

/* 响应式媒体查询 @media */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .features-grid, .pricing-grid, .reviews-grid, .seo-articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-nav-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .hero-title {
    font-size: 2.3rem;
  }
  
  .features-grid, .pricing-grid, .reviews-grid, .seo-articles-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-nav-grid {
    grid-template-columns: 1fr;
  }
  
  .section-nav-widget {
    right: 12px;
  }
  
  .nav-arrow-btn {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}