/* ==========================================================================
   良心云 - 全球极速专线加速器 官方落地页样式表
   ========================================================================== */

/* 1. 基础重置与全局变量 */
:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  
  /* 色彩系统 - 暗夜科技风 */
  --bg-main: #090d16;
  --bg-card: rgba(22, 30, 49, 0.75);
  --bg-card-hover: rgba(30, 41, 66, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(0, 153, 255, 0.4);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* 品牌高光渐变 (亮蓝系) */
  --accent-blue-start: #0099ff;
  --accent-blue-end: #00b4d8;
  --accent-glow: rgba(0, 153, 255, 0.35);
  --accent-cyan: #38bdf8;
  
  /* 阴影与过渡 */
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* 容器定义 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 按钮通用基础 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue-start), var(--accent-blue-end));
  color: #ffffff;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 0.95rem;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 153, 255, 0.5);
  filter: brightness(1.1);
}

.btn-pill-lg {
  background: linear-gradient(135deg, var(--accent-blue-start), var(--accent-blue-end));
  color: #ffffff;
  padding: 14px 36px;
  border-radius: 999px;
  font-size: 1.1rem;
  box-shadow: 0 6px 20px var(--accent-glow);
  gap: 10px;
}

.btn-pill-lg:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 30px rgba(0, 153, 255, 0.55);
  filter: brightness(1.12);
}

.btn-arrow {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

.btn-pill-lg:hover .btn-arrow {
  transform: translateX(4px);
}

.btn-outline-pill {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 14px 32px;
  border-radius: 999px;
  font-size: 1.05rem;
  backdrop-filter: blur(8px);
}

.btn-outline-pill:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 30%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 2. 顶部页眉 (Header) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(9, 13, 22, 0.85);
  border-bottom: 1px solid var(--border-color);
  height: 72px;
  display: flex;
  align-items: center;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #ffffff;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent-blue-start), var(--accent-blue-end));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 12px var(--accent-glow);
}

.logo-icon svg {
  width: 22px;
  height: 22px;
}

.logo-icon.small {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.logo-icon.small svg {
  width: 18px;
  height: 18px;
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #ffffff;
}

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

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.status-indicator-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 6px 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.status-indicator-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 8px #f59e0b;
  animation: pulse-warn 2s infinite;
}

@keyframes pulse-warn {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* 3. 主视觉区 (Hero Section) */
.hero-section {
  position: relative;
  padding: 90px 0 80px;
  text-align: center;
  overflow: hidden;
}

.hero-bg-glow {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 450px;
  background: radial-gradient(circle, rgba(0, 153, 255, 0.22) 0%, rgba(0, 180, 216, 0.08) 45%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}

.hero-container {
  position: relative;
  z-index: 1;
  max-width: 920px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 153, 255, 0.1);
  border: 1px solid rgba(0, 153, 255, 0.3);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  color: #38bdf8;
  font-weight: 600;
  margin-bottom: 24px;
}

.badge-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 6px #38bdf8;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 22px;
  letter-spacing: -1px;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

/* 关键数据指标条 */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(7, auto);
  align-items: center;
  justify-content: center;
  background: rgba(18, 25, 42, 0.65);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  padding: 24px 36px;
  border-radius: 20px;
  box-shadow: var(--shadow-card);
  max-width: 820px;
  margin: 0 auto;
}

.metric-item {
  text-align: center;
}

.metric-val {
  font-size: 1.75rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.5px;
}

.metric-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.metric-divider {
  width: 1px;
  height: 36px;
  background: rgba(255, 255, 255, 0.1);
  margin: 0 24px;
}

/* 4. 章节通用排版 */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* 5. 核心优势卡片 (Features Grid) */
.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: 20px;
  padding: 36px 30px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: 0 16px 36px -8px rgba(0, 153, 255, 0.2);
}

.feature-icon-box {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: rgba(0, 153, 255, 0.12);
  color: #38bdf8;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  border: 1px solid rgba(0, 153, 255, 0.25);
}

.feature-icon-box svg {
  width: 26px;
  height: 26px;
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 14px;
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.feature-checklist {
  list-style: none;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-checklist li {
  font-size: 0.85rem;
  color: #cbd5e1;
  position: relative;
  padding-left: 20px;
}

.feature-checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #38bdf8;
  font-weight: bold;
}

/* 6. 节点监控面板 (Network Section) */
.network-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.network-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.network-tag {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  color: #38bdf8;
  letter-spacing: 1px;
}

.network-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
  margin-top: 4px;
}

.network-live-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: #4ade80;
  background: rgba(74, 222, 128, 0.1);
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(74, 222, 128, 0.25);
}

.pulse-green {
  width: 8px;
  height: 8px;
  background: #4ade80;
  border-radius: 50%;
  box-shadow: 0 0 8px #4ade80;
}

.node-table {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.node-row {
  display: grid;
  grid-template-columns: 2.5fr 1fr 1fr 1fr 1fr;
  align-items: center;
  padding: 16px 20px;
  border-radius: 12px;
  background: rgba(14, 21, 35, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 0.95rem;
}

.node-head {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 8px 20px;
}

.node-name {
  color: #ffffff;
  font-weight: 600;
}

.node-tag-item {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.node-ping {
  font-weight: 700;
}

.ping-good {
  color: #4ade80;
}

.node-load {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.load-bar {
  display: inline-block;
  height: 6px;
  width: 32px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  position: relative;
  overflow: hidden;
}

.load-bar::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
}

.load-low::after {
  width: 30%;
  background: #4ade80;
}

.load-medium::after {
  width: 50%;
  background: #facc15;
}

.btn-node-connect {
  background: rgba(0, 153, 255, 0.12);
  color: #38bdf8;
  border: 1px solid rgba(0, 153, 255, 0.3);
  padding: 6px 14px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
  transition: all var(--transition-fast);
}

.btn-node-connect:hover {
  background: var(--accent-blue-start);
  color: #ffffff;
  border-color: var(--accent-blue-start);
}

/* 7. 全平台支持 (Platforms) */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  margin-bottom: 40px;
}

.platform-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px 16px;
  transition: all var(--transition-normal);
  text-align: center;
}

.platform-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.platform-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

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

.platform-version {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.platforms-cta {
  margin-top: 20px;
}

/* 8. 常见问题 (FAQ) */
.faq-accordion {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 22px 26px;
}

.faq-question {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.faq-answer {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 9. 页脚 (Footer) */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: #060910;
  padding-top: 60px;
  margin-top: 60px;
}

.footer-container {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 60px;
  padding-bottom: 48px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer-slogan {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 320px;
  line-height: 1.6;
}

.footer-links-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-heading {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
}

.footer-links-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: #38bdf8;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 22px 0;
  background: rgba(0, 0, 0, 0.2);
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-terms-inline a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-terms-inline a:hover {
  color: var(--text-secondary);
}

/* ==========================================================================
   10. 系统服务异常警示弹窗规范 (严格还原设计图)
   ========================================================================== */

/* 遮罩层 (Backdrop)
   - 页面加载后自动覆盖全屏
   - 背景高斯模糊结合深色半透明
   - backdrop-filter: blur(8px); background: rgba(0, 0, 0, 0.45);
*/
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  
  /* 严格规范要求 */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  background: rgba(0, 0, 0, 0.45);
  
  /* 动画初始状态 (隐藏) */
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              visibility 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
}

/* 弹窗卡片 (Modal Container)
   - 水平及垂直居中悬浮
   - 纯白背景
   - 圆角 16px
   - 带深层柔和阴影 box-shadow: 0 20px 40px rgba(0,0,0,0.25)
   - 最大宽度 440px，移动端自适应左右留白
*/
.modal-container {
  position: relative;
  width: 100%;
  max-width: 440px;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
  overflow: hidden;
  padding: 32px 28px 30px;
  
  /* 动画效果：平滑缩放进入 */
  transform: scale(0.92) translateY(12px);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-backdrop.is-visible .modal-container {
  transform: scale(1) translateY(0);
}

/* 右上角轻量关闭按钮“✕” */
.modal-close-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  background: transparent;
  border: none;
  font-size: 1.15rem;
  color: #94a3b8;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  line-height: 1;
}

.modal-close-btn:hover {
  background: #f1f5f9;
  color: #1e293b;
  transform: rotate(90deg);
}

.modal-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* 警告标题与图标
   - 包含警示图标 ⚠️ 与加粗标题：“系统服务异常”
   - 标题文字深色加粗，居中排版
*/
.modal-header-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 16px;
}

.modal-warning-icon {
  font-size: 2.6rem;
  line-height: 1;
  margin-bottom: 10px;
}

.modal-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: #0f172a;
  letter-spacing: -0.3px;
}

/* 公告正文 (严格方案一文案)
   - 行高舒适，字距清晰，保持视觉警示重点
*/
.modal-content-text {
  font-size: 0.95rem;
  line-height: 1.75;
  color: #334155;
  text-align: left;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 24px;
  letter-spacing: 0.2px;
}

/* 核心行动按钮 (CTA)
   - 文案：“立即访问稳定备用机场”
   - 大圆角药丸按钮 (border-radius: 999px)
   - 高亮亮蓝色 (#0099ff 到 #00b4d8 渐变)
   - 悬停微动效与亮度提升
*/
.modal-action-box {
  width: 100%;
}

.modal-cta-btn {
  display: block;
  width: 100%;
  padding: 14px 20px;
  border-radius: 999px;
  background: linear-gradient(135deg, #0099ff 0%, #00b4d8 100%);
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  letter-spacing: 0.3px;
  box-shadow: 0 6px 18px rgba(0, 153, 255, 0.4);
  transition: all 0.25s ease;
}

.modal-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 153, 255, 0.55);
  filter: brightness(1.1);
}

.modal-cta-btn:active {
  transform: translateY(0);
}

/* ==========================================================================
   11. 移动端响应式适配 (Mobile Responsive)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.8rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .platforms-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-links-col {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .hero-section {
    padding: 60px 0 50px;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-desc {
    font-size: 1rem;
    padding: 0 10px;
  }

  .hero-metrics {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    padding: 20px;
  }

  .metric-divider {
    display: none;
  }

  .node-row {
    grid-template-columns: 1fr;
    gap: 8px;
    text-align: left;
    padding: 16px;
  }

  .node-head {
    display: none;
  }

  .btn-node-connect {
    margin-top: 8px;
    padding: 8px;
  }

  .platforms-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-links-col {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  /* 弹窗在移动端的留白保障 */
  .modal-container {
    padding: 26px 20px 22px;
    max-width: 100%;
    border-radius: 14px;
  }

  .modal-title {
    font-size: 1.3rem;
  }

  .modal-content-text {
    font-size: 0.9rem;
    padding: 14px 14px;
    margin-bottom: 20px;
  }
}