/* ==========================================================================
   疾风云 - 现代化原生极简样式表 (移动端优先，纯原生CSS，秒开极速体验)
   ========================================================================== */

:root {
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
  --accent: #10b981;
  --accent-purple: #8b5cf6;
  --bg-dark: #090d16;
  --bg-card: #111827;
  --bg-card-hover: #1f2937;
  --bg-card-border: rgba(255, 255, 255, 0.08);
  --text-main: #f3f4f6;
  --text-sub: #9ca3af;
  --text-muted: #6b7280;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(37, 99, 235, 0.35);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1200px;
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #172554 0%, #090d16 65%);
}

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

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

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

/* 导航栏 (Header) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 13, 22, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--bg-card-border);
  transition: var(--transition);
}

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

.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #fff;
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: var(--primary-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
}

.site-nav {
  display: none; /* 移动端默认隐藏长目录，保留最精炼按钮；桌面端展示完整导航 */
}

@media (min-width: 860px) {
  .site-nav {
    display: flex;
    align-items: center;
    gap: 28px;
  }
  .nav-link {
    font-size: 0.95rem;
    color: var(--text-sub);
    transition: var(--transition);
    font-weight: 500;
  }
  .nav-link:hover {
    color: #fff;
  }
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 9999px;
  background: var(--primary-gradient);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
  transition: var(--transition);
}

.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
}

/* 按钮通用风格 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  background: var(--primary-gradient);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);
  transition: var(--transition);
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.6);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 26px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

/* 区块通用结构 */
.section-padding {
  padding: 70px 0;
}

@media (min-width: 768px) {
  .section-padding {
    padding: 100px 0;
  }
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px auto;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  padding: 5px 12px;
  border-radius: 9999px;
  margin-bottom: 14px;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.3;
  color: #fff;
  margin-bottom: 14px;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.3rem;
  }
}

.section-desc {
  font-size: 1rem;
  color: var(--text-sub);
}

/* 主视觉区 (Hero Section) */
.hero-section {
  padding: 60px 0 80px 0;
  position: relative;
}

@media (min-width: 992px) {
  .hero-section {
    padding: 90px 0 110px 0;
  }
}

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

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 60px;
  }
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 0.85rem;
  color: #93c5fd;
  margin-bottom: 20px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3.2rem;
  }
}

.gradient-text {
  background: linear-gradient(135deg, #60a5fa 0%, #34d399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtext {
  font-size: 1.05rem;
  color: var(--text-sub);
  margin-bottom: 30px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 35px;
}

.hero-stats {
  display: flex;
  gap: 25px;
  padding-top: 25px;
  border-top: 1px solid var(--bg-card-border);
}

.stat-item h3, .stat-item .stat-num {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
}

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

/* 主视觉动态卡片 (Hero Interactive Card) */
.hero-visual {
  position: relative;
}

.dynamic-card {
  background: rgba(17, 24, 39, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.dynamic-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(from 0deg, transparent, rgba(59, 130, 246, 0.15), transparent 30%);
  animation: rotate-beam 8s linear infinite;
  z-index: 0;
  pointer-events: none;
}

@keyframes rotate-beam {
  100% { transform: rotate(360deg); }
}

.card-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.card-status-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: #34d399;
  font-weight: 600;
  background: rgba(16, 185, 129, 0.12);
  padding: 4px 10px;
  border-radius: 9999px;
}

.status-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #34d399;
}

.nodes-monitor-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  z-index: 1;
}

.node-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.node-row:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(59, 130, 246, 0.3);
}

.node-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-flag {
  font-size: 1.1rem;
}

.node-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: #e5e7eb;
}

.node-type {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.node-stats {
  text-align: right;
}

.node-ping {
  font-size: 0.85rem;
  font-weight: 700;
  color: #34d399;
}

.node-load {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.speed-meter {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
  z-index: 1;
}

.speed-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  margin-bottom: 8px;
  color: var(--text-sub);
}

.speed-bar-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 9999px;
  overflow: hidden;
}

.speed-bar-fill {
  height: 100%;
  width: 94%;
  background: var(--primary-gradient);
  border-radius: 9999px;
  animation: pulse-bar 3s ease-in-out infinite alternate;
}

@keyframes pulse-bar {
  0% { width: 88%; }
  100% { width: 98%; }
}

/* 核心优势板块 (3个图文卡片) */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: var(--shadow-card), 0 0 20px rgba(37, 99, 235, 0.15);
}

.feature-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(37, 99, 235, 0.12);
  color: #60a5fa;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.65;
}

/* 流媒体与 AI 支持图卡 */
.streaming-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .streaming-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.unlock-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.unlock-card:hover {
  border-color: rgba(16, 185, 129, 0.3);
}

.unlock-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
}

.unlock-badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.unlock-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 0.85rem;
  color: #e2e8f0;
}

/* 价格对比表板块 (Pricing Section) */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 30px 22px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.price-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card);
}

.price-card.featured {
  border-color: #3b82f6;
  background: linear-gradient(180deg, rgba(30, 58, 138, 0.3) 0%, var(--bg-card) 60%);
  box-shadow: 0 0 25px rgba(59, 130, 246, 0.25);
}

.featured-ribbon {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 9999px;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.5);
}

.plan-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-bottom: 20px;
}

.plan-price-box {
  margin-bottom: 24px;
}

.plan-currency {
  font-size: 1.2rem;
  font-weight: 600;
  color: #fff;
}

.plan-price-num {
  font-size: 2.3rem;
  font-weight: 800;
  color: #fff;
}

.plan-period {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.plan-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: #d1d5db;
}

.check-icon {
  width: 16px;
  height: 16px;
  color: #10b981;
  flex-shrink: 0;
}

.price-card .btn-primary, .price-card .btn-secondary {
  width: 100%;
  padding: 12px;
  font-size: 0.95rem;
}

/* 9篇 SEO 文章图卡板块 (位于价格板块下方) */
.articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: var(--shadow-card);
}

.article-thumb {
  height: 160px;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--bg-card-border);
  overflow: hidden;
}

.article-thumb-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3px 10px;
  border-radius: 9999px;
  font-size: 0.75rem;
  color: #38bdf8;
  font-weight: 600;
}

.article-thumb-icon {
  width: 50px;
  height: 50px;
  color: rgba(255, 255, 255, 0.25);
  transition: var(--transition);
}

.article-card:hover .article-thumb-icon {
  transform: scale(1.1);
  color: #3b82f6;
}

.article-content {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.article-title {
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
  color: #fff;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: var(--transition);
}

.article-card:hover .article-title {
  color: #60a5fa;
}

.article-summary {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.article-footer-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: #38bdf8;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-footer-link:hover {
  text-decoration: underline;
}

/* 用户评价 (Testimonials) */
.reviews-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 768px) {
  .reviews-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

.review-stars {
  color: #fbbf24;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 16px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.author-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #1e293b;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #38bdf8;
  font-size: 0.85rem;
}

.author-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
}

.author-role {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* FAQ 常见问题解答 */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-question {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-question::before {
  content: 'Q';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 4px;
  background: rgba(37, 99, 235, 0.2);
  color: #60a5fa;
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
}

.faq-answer {
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.65;
  padding-left: 32px;
}

/* 页脚 (Footer) */
.site-footer {
  background: #060911;
  border-top: 1px solid var(--bg-card-border);
  padding: 50px 0 35px 0;
  margin-top: auto;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 30px;
  margin-bottom: 30px;
}

.footer-nav-link {
  font-size: 0.95rem;
  color: #e5e7eb;
  font-weight: 600;
  transition: var(--transition);
}

.footer-nav-link:hover {
  color: #38bdf8;
  text-decoration: underline;
}

.pbn-container {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.pbn-statement {
  font-size: 0.88rem;
  color: #94a3b8;
  margin-bottom: 12px;
}

.pbn-links-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 18px;
  margin-bottom: 16px;
}

/* 友情链接显色高亮设置 */
.pbn-anchor-link {
  font-size: 0.88rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  transition: var(--transition);
}

.pbn-link-1 {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.pbn-link-1:hover {
  background: rgba(56, 189, 248, 0.2);
  color: #7dd3fc;
}

.pbn-link-2 {
  color: #34d399;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.25);
}

.pbn-link-2:hover {
  background: rgba(52, 211, 153, 0.2);
  color: #6ee7b7;
}

.pbn-link-3 {
  color: #f472b6;
  background: rgba(244, 114, 182, 0.1);
  border: 1px solid rgba(244, 114, 182, 0.25);
}

.pbn-link-3:hover {
  background: rgba(244, 114, 182, 0.2);
  color: #fbcfe8;
}

.footer-copyright {
  font-size: 0.78rem;
  color: var(--text-muted);
}