/* ==========================================================================
   赛风 (Saifeng) - 核心组件样式体系 (Components CSS)
   ========================================================================== */

/* ---------------- 顶部导航栏 (Navbar) ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 9, 14, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  background: rgba(7, 9, 14, 0.96);
  border-bottom: 1px solid var(--border-violet);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

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

/* 品牌 Logo 规范：统一呈现为“赛风”，严禁附带任何域名后缀 */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ffffff;
  user-select: none;
}

.brand-icon-wrapper {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.25), rgba(16, 185, 129, 0.25));
  border: 1px solid var(--border-violet);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--emerald-green-light);
  box-shadow: 0 0 16px rgba(168, 85, 247, 0.3);
  transition: transform var(--transition-fast);
}

.brand-logo:hover .brand-icon-wrapper {
  transform: rotate(6deg) scale(1.05);
  border-color: var(--emerald-green);
}

.brand-name {
  background: linear-gradient(135deg, #ffffff 40%, var(--plasma-violet-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--plasma-violet), var(--emerald-green));
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--text-main);
  cursor: pointer;
}

/* ---------------- 英雄区 (Hero Section) ---------------- */
.hero-section {
  position: relative;
  padding: 80px 0 60px;
  overflow: hidden;
}

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

.hero-content h1 {
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero-description {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-bottom: 40px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 28px;
}

.metric-item .metric-value {
  font-size: 1.85rem;
  font-weight: 800;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, #ffffff, var(--emerald-green-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.metric-item .metric-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* 英雄区控制台卡片 */
.hero-console-card {
  background: rgba(12, 17, 26, 0.85);
  border: 1px solid var(--border-violet);
  border-radius: 18px;
  box-shadow: var(--shadow-lg), 0 0 35px rgba(168, 85, 247, 0.15);
  overflow: hidden;
}

.console-header {
  background: rgba(20, 27, 40, 0.9);
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.window-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.console-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
}

.console-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
}

/* ---------------- 交互模拟器: MPQUIC 双网聚合 ---------------- */
.mpquic-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: 16px;
  padding: 28px;
  box-shadow: var(--shadow-md);
  margin-top: 24px;
}

.sim-controls-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.channel-switch-group {
  display: flex;
  gap: 14px;
  align-items: center;
}

.toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.toggle-btn.active {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--emerald-green);
  color: var(--emerald-green-light);
  box-shadow: 0 0 14px var(--emerald-glow);
}

.toggle-btn.severed {
  background: rgba(244, 63, 94, 0.15);
  border-color: var(--rose-alert);
  color: #fda4af;
  text-decoration: line-through;
}

.sim-display-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.waveform-canvas-wrap {
  position: relative;
  background: #04060a;
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  height: 250px;
  padding: 12px;
  display: flex;
  flex-direction: column;
}

.waveform-canvas-wrap canvas {
  width: 100%;
  height: 100%;
}

.waveform-legend {
  display: flex;
  justify-content: flex-end;
  gap: 14px;
  margin-bottom: 6px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.legend-tag {
  display: flex;
  align-items: center;
  gap: 5px;
}

.legend-tag::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 3px;
  border-radius: 2px;
}

.legend-fiber::before { background: var(--cyan-neon); }
.legend-cellular::before { background: var(--plasma-violet); }
.legend-aggregated::before { background: var(--emerald-green-light); }

.sim-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.stat-tile {
  background: rgba(7, 10, 15, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 14px 18px;
}

.stat-tile .num {
  font-size: 1.45rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: #ffffff;
}

.stat-tile .title {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ---------------- 交互看板: TLS 1.3 拟态混淆对抗 ---------------- */
.mimicry-dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.radar-wrapper {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  position: relative;
}

.radar-wrapper canvas {
  max-width: 100%;
  height: auto;
}

.dpi-log-stream {
  background: #030508;
  border: 1px solid var(--border-violet);
  border-radius: 12px;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  height: 240px;
  overflow-y: auto;
  line-height: 1.6;
}

.log-entry {
  display: flex;
  gap: 10px;
  margin-bottom: 6px;
}
.log-time { color: var(--text-muted); }
.log-action { color: var(--plasma-violet-light); }
.log-status { color: var(--emerald-green-light); font-weight: 600; }
.log-drop { color: var(--rose-alert); }

/* ---------------- 交互看板: 全球 Anycast 与住宅 ISP ---------------- */
.topology-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 30px;
}

.node-selector-bar {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 12px;
  margin-bottom: 24px;
}

.node-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.node-btn.active {
  background: rgba(168, 85, 247, 0.15);
  border-color: var(--plasma-violet);
  color: #ffffff;
  box-shadow: 0 0 16px var(--plasma-glow);
}

.node-detail-panel {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 28px;
}

.unlock-matrix {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.unlock-card {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  padding: 12px 16px;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
}

.unlock-status {
  color: var(--emerald-green-light);
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 5px;
}

/* ---------------- 价格套餐对比体系 (Pricing) ---------------- */
.pricing-header-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 36px 0 48px;
}

.toggle-switch-wrap {
  display: flex;
  align-items: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: 9999px;
  padding: 4px;
  cursor: pointer;
}

.toggle-switch-btn {
  padding: 8px 22px;
  border-radius: 9999px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.toggle-switch-btn.active {
  background: linear-gradient(135deg, var(--plasma-violet), var(--emerald-green-dark));
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.save-badge {
  background: rgba(16, 185, 129, 0.2);
  color: var(--emerald-green-light);
  border: 1px solid var(--border-emerald);
  padding: 3px 10px;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 700;
}

.pricing-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card.featured {
  border-color: var(--plasma-violet);
  background: linear-gradient(180deg, rgba(20, 28, 44, 0.95), rgba(12, 16, 26, 0.95));
  box-shadow: 0 0 35px rgba(168, 85, 247, 0.2);
  transform: scale(1.02);
}

.pricing-card.featured::before {
  content: "最受欢迎 · 极客首选";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--plasma-violet), var(--emerald-green));
  color: #ffffff;
  padding: 4px 14px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.pricing-plan-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 42px;
}

.price-display {
  margin: 20px 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-symbol {
  font-size: 1.4rem;
  color: var(--text-secondary);
}

.price-amount {
  font-size: 2.8rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #ffffff;
  letter-spacing: -0.03em;
}

.price-period {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.pricing-features-list {
  list-style: none;
  margin: 24px 0;
  flex-grow: 1;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.feature-item.highlight {
  color: var(--text-main);
  font-weight: 600;
}

.feature-item .icon-check {
  color: var(--emerald-green-light);
  flex-shrink: 0;
}

/* ---------------- FAQ 手风琴 ---------------- */
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--border-violet);
  box-shadow: 0 4px 20px rgba(168, 85, 247, 0.15);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
}

.faq-icon {
  font-size: 1.25rem;
  color: var(--plasma-violet-light);
  transition: transform var(--transition-normal);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--emerald-green-light);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  padding-bottom: 22px;
  max-height: 600px;
}

/* ---------------- 资讯中心: 分页器与展开器 ---------------- */
.news-filters {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 36px;
}

.filter-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 550;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--plasma-violet), var(--emerald-green-dark));
  color: #ffffff;
  border-color: transparent;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 24px;
  transition: all var(--transition-normal);
}

.news-card:hover {
  border-color: var(--border-violet);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.news-full-body {
  display: none;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--border-subtle);
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.news-full-body.expanded {
  display: block;
  animation: fadeIn 0.3s ease-in-out;
}

.toggle-expand-btn {
  background: transparent;
  border: none;
  color: var(--plasma-violet-light);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  transition: color var(--transition-fast);
}

.toggle-expand-btn:hover {
  color: var(--emerald-green-light);
}

.pagination-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 40px;
}

.page-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.page-btn:hover,
.page-btn.active {
  background: var(--plasma-violet);
  color: #ffffff;
  border-color: var(--plasma-violet);
}

.page-btn.disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ---------------- 页脚系统 (Footer) ---------------- */
.site-footer {
  background: #04060a;
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 30px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 380px;
}

.footer-col h4 {
  font-size: 0.95rem;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--plasma-violet-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.cert-badges {
  display: flex;
  gap: 16px;
  align-items: center;
}

.cert-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 响应式调整 */
@media (max-width: 1024px) {
  .pricing-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    width: 100%;
    background: rgba(7, 9, 14, 0.98);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-subtle);
    gap: 18px;
  }
  .nav-menu.open {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .pricing-cards-grid {
    grid-template-columns: 1fr;
  }
  .sim-display-grid,
  .mimicry-dashboard-grid,
  .node-detail-panel {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 14px;
    text-align: center;
  }
}