/* ==========================================================================
   快雷 GO云机场 - 官方 CSS 样式表 (kuaileijc.xyz)
   Design: Cyber Lightning & Glassmorphism Theme
   ========================================================================== */

:root {
  --bg-primary: #0a0d18;
  --bg-secondary: #121829;
  --bg-card: rgba(22, 30, 50, 0.7);
  --bg-card-hover: rgba(30, 42, 70, 0.85);
  
  --color-brand-cyan: #00f2fe;
  --color-brand-blue: #4facfe;
  --color-brand-purple: #7f00ff;
  --color-brand-pink: #ff007f;
  --color-accent-gold: #ffb703;
  
  --text-main: #f0f4fc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 242, 254, 0.3);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-brand-cyan);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--color-brand-blue);
}

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 玻璃拟态卡片 */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.glass-panel:hover {
  border-color: var(--border-glow);
  box-shadow: 0 10px 30px rgba(0, 242, 254, 0.12);
}

/* 渐变文字 */
.text-gradient {
  background: linear-gradient(135deg, var(--color-brand-cyan) 0%, var(--color-brand-blue) 50%, var(--color-brand-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 按钮通用规范 */
/* 按钮通用规范 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--color-brand-cyan) 0%, var(--color-brand-blue) 100%);
  color: #050a15;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.35);
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 242, 254, 0.5);
  color: #000;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 50px;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-brand-cyan);
  color: #fff;
}

/* 头部导航栏 */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 13, 24, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 14px 0;
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
  gap: 16px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.logo-img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #fff;
  white-space: nowrap;
}

.logo-badge {
  font-size: 0.7rem;
  padding: 2px 7px;
  background: rgba(0, 242, 254, 0.15);
  color: var(--color-brand-cyan);
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: 20px;
  font-weight: 600;
  white-space: nowrap;
  display: inline-block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  white-space: nowrap;
}

.nav-links li {
  white-space: nowrap;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  display: inline-block;
}
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--color-brand-cyan);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
}

.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 20px;
  z-index: 999;
}

.mobile-nav-drawer.active {
  display: block;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-nav-links a {
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 500;
}

/* HERO SECTION */
.hero-section-xyz {
  padding: 80px 0 60px;
  position: relative;
  background: radial-gradient(circle at 50% 20%, rgba(0, 242, 254, 0.08) 0%, transparent 60%);
}

.hero-layout-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(127, 0, 255, 0.15);
  border: 1px solid rgba(127, 0, 255, 0.3);
  color: #c084fc;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 30px;
  margin-bottom: 20px;
}

.hero-title-xyz {
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-subtitle-xyz {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* HERO RIGHT CARD - LIVE MONITOR */
.hero-right-card {
  padding: 28px;
}

.hero-right-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: #4ade80;
  font-weight: 600;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #4ade80;
  border-radius: 50%;
  box-shadow: 0 0 10px #4ade80;
  animation: pulse 2s infinite;
}

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

.spec-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.spec-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.92rem;
}

.spec-label {
  color: var(--text-muted);
}

.spec-value {
  color: #fff;
  font-weight: 600;
}

.badge-tag {
  background: rgba(0, 242, 254, 0.1);
  color: var(--color-brand-cyan);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* 通用 Section 样式 */
.section-padding {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 50px;
}

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

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
}

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

/* 节点实时测速 grid */
.speed-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.speed-card {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.speed-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.node-name {
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ping-tag {
  font-size: 0.85rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
  background: rgba(74, 222, 128, 0.15);
  color: #4ade80;
}

.speed-bar-bg {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  overflow: hidden;
}

.speed-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-brand-cyan), var(--color-brand-blue));
  border-radius: 10px;
}

.speed-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 服务优势 grid */
.feature-grid-xyz {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.feature-box-xyz {
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.feature-box-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(0, 242, 254, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--color-brand-cyan);
}

.feature-box-xyz h3 {
  font-size: 1.3rem;
  font-weight: 700;
}

.feature-box-xyz p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.7;
}

/* 套餐价格 Matrix */
.pricing-matrix-xyz {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.pricing-card-xyz {
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.pricing-card-xyz.recommended {
  border-color: var(--color-brand-cyan);
  box-shadow: 0 0 35px rgba(0, 242, 254, 0.2);
  background: rgba(22, 34, 60, 0.85);
}

.badge-ribbon {
  position: absolute;
  top: -14px;
  right: 20px;
  background: linear-gradient(135deg, var(--color-brand-cyan), var(--color-brand-blue));
  color: #000;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: 20px;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.card-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  min-height: 38px;
}

.card-price-row {
  margin-bottom: 24px;
}

.price-num {
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--color-brand-cyan);
}

.price-unit {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.feature-check-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
}

.feature-check-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-main);
}

.feature-check-list svg {
  width: 18px;
  height: 18px;
  color: var(--color-brand-cyan);
  flex-shrink: 0;
}

/* 用户评价 TESTIMONIALS SECTION */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.testimonial-card {
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-brand-blue), var(--color-brand-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  font-size: 1.1rem;
}

.user-name {
  font-weight: 700;
  font-size: 1.05rem;
}

.user-role {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.rating-stars {
  color: var(--color-accent-gold);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.testimonial-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* 常见问题 FAQ SECTION */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: 24px;
}

.faq-card {
  padding: 28px;
}

.faq-question {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-brand-cyan);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

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

/* 文章博客列表 SECTION */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.article-card-xyz {
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.art-tag {
  font-size: 0.78rem;
  padding: 4px 10px;
  background: rgba(0, 242, 254, 0.1);
  color: var(--color-brand-cyan);
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 14px;
  font-weight: 600;
}

.art-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}

.art-title a {
  color: #fff;
}

.art-title a:hover {
  color: var(--color-brand-cyan);
}

.art-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.art-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-brand-cyan);
}

/* 文章详情页布局 ARTICLE DETAIL LAYOUT */
.article-detail-section {
  padding: 60px 0 80px;
}

.article-container {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
}

.article-body {
  padding: 40px;
}

.article-header-meta {
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.art-meta-info {
  display: flex;
  gap: 16px;
  color: var(--text-dim);
  font-size: 0.88rem;
  margin-top: 10px;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #d1d5db;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  margin: 36px 0 16px;
  border-left: 4px solid var(--color-brand-cyan);
  padding-left: 14px;
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #f3f4f6;
  margin: 28px 0 12px;
}

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

.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-content ul li {
  list-style: disc;
  margin-bottom: 8px;
}

.article-content blockquote {
  background: rgba(0, 242, 254, 0.05);
  border-left: 4px solid var(--color-brand-cyan);
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
}

.sidebar-widget {
  padding: 24px;
  margin-bottom: 24px;
}

.widget-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.widget-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.widget-list a {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.widget-list a:hover {
  color: var(--color-brand-cyan);
}

/* 页脚 FOOTER & PBN FRIEND LINKS (Core Task 2) */
footer {
  background: #060911;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  margin-top: auto;
}

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

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 14px;
  line-height: 1.6;
}

.footer-col h5 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--color-brand-cyan);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.footer-bottom p {
  color: var(--text-dim);
  font-size: 0.88rem;
}

/* 【Core Task 2: 页脚 PBN 权重精准输血管道】 */
.footer-friend-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 6px;
}

.footer-friend-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.footer-friend-links a:hover {
  color: var(--color-brand-cyan);
  text-decoration: underline;
}

.footer-friend-links span {
  color: rgba(255, 255, 255, 0.2);
}

/* 新手教程与客户端下载 SECTION STYLES */
.quick-steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 50px;
}

.quick-step-card {
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.step-num-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-brand-cyan), var(--color-brand-blue));
  color: #000;
  font-weight: 900;
  font-size: 1.2rem;
  margin-bottom: 14px;
}

.quick-step-card h4 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: #fff;
}

.quick-step-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 客户端下载 Grid */
.client-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.client-card {
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.client-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.client-os-icon {
  font-size: 2.2rem;
  line-height: 1;
}

.client-os-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
}

.client-recommended-tag {
  font-size: 0.78rem;
  color: var(--color-brand-cyan);
  font-weight: 600;
}

.client-body {
  margin-bottom: 20px;
}

.client-body p {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.client-tutorial-steps {
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 0.85rem;
  color: var(--text-main);
}

.client-tutorial-steps li {
  list-style: decimal;
  margin-left: 16px;
  margin-bottom: 6px;
}

.client-tutorial-steps li:last-child {
  margin-bottom: 0;
}

.client-btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* 响应式适配 MOBILE RESPONSIVE */
@media (max-width: 1200px) {
  .nav-links {
    gap: 12px;
  }
  .nav-links a {
    font-size: 0.85rem;
  }
  .logo-text {
    font-size: 1.15rem;
  }
}

@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .hero-layout-grid {
    grid-template-columns: 1fr;
  }
  .article-container {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title-xyz {
    font-size: 2.1rem;
  }
  .faq-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .client-grid {
    grid-template-columns: 1fr;
  }
}