/* ==========================================================================
   阿达西 (Adaxi) - 商务极简风 (Business Minimalist Style) CSS 样式表
   极简、原生、高颜商务质感、亚秒级首屏加载
   ========================================================================== */

/* 1. CSS Reset & 商务风格变量 */
:root {
  --bg-dark: #080d1a;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.9);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(59, 130, 246, 0.4);
  
  --primary-gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-purple: #8b5cf6;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-sub: #64748b;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6), inset 0 1px 0 0 rgba(255, 255, 255, 0.1);
  --shadow-btn: 0 4px 20px rgba(37, 99, 235, 0.35);
  --transition-fast: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  background-image: 
    radial-gradient(circle at 10% 10%, rgba(37, 99, 235, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 90% 50%, rgba(6, 182, 212, 0.1) 0%, transparent 45%),
    radial-gradient(circle at 50% 95%, rgba(15, 23, 42, 0.8) 0%, transparent 50%);
  background-attachment: fixed;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #fff;
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.45);
  filter: brightness(1.08);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border-color: var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.05rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(37, 99, 235, 0.12);
  color: #60a5fa;
  border: 1px solid rgba(37, 99, 235, 0.3);
}

.badge-green {
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.3);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem auto;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: #ffffff;
}

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

/* ==========================================================================
   2. 页眉导航目录 (Header with Navigation Catalog)
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 13, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.9rem 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(37, 99, 235, 0.4);
}

.nav-catalog {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.925rem;
  font-weight: 500;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link:hover {
  color: var(--accent-cyan);
}

/* ==========================================================================
   3. 主视觉区 (Hero Section: 左右分布 + 动态图卡)
   ========================================================================== */
.hero {
  padding: 5rem 0 4rem 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

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

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  color: #ffffff;
}

.hero-title .brand-highlight {
  background: linear-gradient(135deg, #60a5fa 0%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2.25rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-trust-list {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.hero-dynamic-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.hero-dynamic-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.card-header-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-green);
}

.pulse-dot {
  width: 10px;
  height: 10px;
  background: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-ring 1.8s infinite;
}

@keyframes pulse-ring {
  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); }
}

.node-status-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-bottom: 1.5rem;
}

.node-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition-fast);
}

.node-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(59, 130, 246, 0.4);
  transform: translateX(4px);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.node-flag { font-size: 1.1rem; }
.node-name { font-size: 0.9rem; font-weight: 600; }
.node-type { font-size: 0.75rem; color: var(--text-sub); }

.node-ping {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-green);
  font-family: monospace;
}

.speed-bar-box {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem;
}

.speed-title-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.speed-progress-track {
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.speed-progress-fill {
  height: 100%;
  width: 92%;
  background: var(--primary-gradient);
  border-radius: 4px;
  animation: speed-pulse 3s infinite alternate;
}

@keyframes speed-pulse {
  0% { width: 85%; }
  50% { width: 96%; }
  100% { width: 90%; }
}

/* ==========================================================================
   4. 核心优势 3大卡片
   ========================================================================== */
.features-section { padding: 5rem 0; }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.75rem; }

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.25rem 1.75rem;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  transition: var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
}

.feature-icon-wrap {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-sm);
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(37, 99, 235, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: #38bdf8;
}

.feature-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.75rem; color: #fff; }
.feature-desc { color: var(--text-muted); font-size: 0.925rem; line-height: 1.6; }

/* ==========================================================================
   5. 流媒体与 AI 支持矩阵
   ========================================================================== */
.support-section {
  padding: 5rem 0;
  background: rgba(15, 23, 42, 0.35);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.support-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }

.support-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition-fast);
}

.support-card:hover {
  transform: translateY(-3px);
  border-color: rgba(6, 182, 212, 0.4);
  background: rgba(30, 41, 59, 0.85);
}

.support-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.05rem;
  flex-shrink: 0;
}

.icon-ai { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.icon-netflix { background: rgba(239, 68, 68, 0.15); color: #f87171; }
.icon-yt { background: rgba(239, 68, 68, 0.2); color: #ef4444; }
.icon-claude { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.icon-disney { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.icon-spotify { background: rgba(34, 197, 94, 0.15); color: #4ade80; }

.support-info { display: flex; flex-direction: column; }
.support-name { font-weight: 700; font-size: 0.95rem; }
.support-tag { font-size: 0.775rem; color: var(--text-muted); }

/* ==========================================================================
   6. 价格方案表 (Pricing Table)
   ========================================================================== */
.pricing-section { padding: 6rem 0 3rem 0; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.75rem; align-items: stretch; }

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.25rem 1.75rem;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-fast);
}

.pricing-card.popular {
  border-color: rgba(37, 99, 235, 0.7);
  background: rgba(23, 37, 84, 0.6);
  box-shadow: 0 15px 40px -10px rgba(37, 99, 235, 0.35);
  transform: scale(1.02);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 1rem;
  border-radius: var(--radius-full);
}

.plan-name { font-size: 1.3rem; font-weight: 700; margin-bottom: 0.5rem; color: #fff; }
.plan-desc { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 1.5rem; }
.plan-price { font-size: 2.5rem; font-weight: 800; color: #fff; margin-bottom: 1.5rem; display: flex; align-items: baseline; gap: 0.25rem; }
.plan-price span { font-size: 0.9rem; font-weight: 500; color: var(--text-muted); }

.plan-features { list-style: none; margin-bottom: 2rem; flex-grow: 1; }
.plan-features li { display: flex; align-items: center; gap: 0.6rem; font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0.8rem; }
.plan-features li svg { color: var(--accent-green); flex-shrink: 0; }

/* ==========================================================================
   7. SEO 文章卡片板块 (位于价格板块下方)
   ========================================================================== */
.articles-section {
  padding: 5rem 0 6rem 0;
  border-top: 1px solid var(--border-color);
  background: rgba(10, 16, 30, 0.4);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(59, 130, 246, 0.5);
  background: var(--bg-card-hover);
}

.article-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.article-card-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(6, 182, 212, 0.25);
}

.article-card-date {
  font-size: 0.775rem;
  color: var(--text-sub);
}

.article-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.45;
  margin-bottom: 0.75rem;
}

.article-card-snippet {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #38bdf8;
  transition: var(--transition-fast);
}

.article-card-link:hover {
  color: #60a5fa;
  transform: translateX(4px);
}

/* 内链样式 */
.internal-link {
  color: #38bdf8;
  font-weight: 600;
  text-decoration: underline;
}

.internal-link:hover {
  color: #60a5fa;
}

/* ==========================================================================
   8. 用户评价 (Testimonials)
   ========================================================================== */
.reviews-section {
  padding: 5rem 0;
  background: rgba(15, 23, 42, 0.25);
}
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.75rem; }

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars { color: #f59e0b; margin-bottom: 0.75rem; font-size: 0.9rem; }
.review-content { font-size: 0.925rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 1.5rem; }
.review-user { display: flex; align-items: center; gap: 0.75rem; }
.user-avatar { width: 40px; height: 40px; border-radius: var(--radius-full); background: var(--primary-gradient); display: flex; align-items: center; justify-content: center; font-weight: 700; color: #fff; }
.user-name { font-weight: 600; font-size: 0.9rem; }
.user-role { font-size: 0.775rem; color: var(--text-sub); }

/* ==========================================================================
   9. 常见问题 (FAQ)
   ========================================================================== */
.faq-section { padding: 6rem 0; }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 1rem; }

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

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-icon { transition: transform 0.3s ease; color: var(--text-muted); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s cubic-bezier(0, 1, 0, 1); padding: 0 1.5rem; color: var(--text-muted); font-size: 0.925rem; line-height: 1.6; }

.faq-item.active .faq-icon { transform: rotate(180deg); color: #38bdf8; }
.faq-item.active .faq-answer { max-height: 500px; padding: 0 1.5rem 1.25rem 1.5rem; transition: max-height 0.3s cubic-bezier(1, 0, 1, 0); }

/* ==========================================================================
   10. 页脚 (Footer - 严格包含 4 个标题链接在新页面打开)
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border-color);
  background: rgba(5, 8, 15, 0.95);
  padding: 3rem 0 2rem 0;
}

.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 2rem; }
.footer-brand { display: flex; align-items: center; gap: 0.5rem; font-size: 1.2rem; font-weight: 800; }
.footer-links { display: flex; align-items: center; justify-content: center; gap: 2.5rem; flex-wrap: wrap; }
.footer-link { font-size: 0.95rem; font-weight: 600; color: var(--text-muted); transition: var(--transition-fast); }
.footer-link:hover { color: #38bdf8; text-decoration: underline; }
.footer-copy { font-size: 0.85rem; color: var(--text-sub); text-align: center; border-top: 1px solid rgba(255, 255, 255, 0.05); width: 100%; padding-top: 1.5rem; margin-top: 1rem; }

/* ==========================================================================
   11. 独立子页面 & SEO 文章页 独有样式
   ========================================================================== */
.page-header { padding: 4rem 0 2rem 0; text-align: center; }
.page-title { font-size: 2.5rem; font-weight: 800; margin-bottom: 1rem; }

.page-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 3rem 2.5rem;
  margin-bottom: 4rem;
  backdrop-filter: blur(16px);
}

.article-meta-box {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.article-section { margin-bottom: 2.5rem; }
.article-h2 { font-size: 1.4rem; font-weight: 700; color: var(--text-main); margin-bottom: 1rem; display: flex; align-items: center; gap: 0.5rem; border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; }
.article-h3 { font-size: 1.15rem; font-weight: 600; color: #38bdf8; margin: 1.5rem 0 0.75rem 0; }
.article-p { color: var(--text-muted); font-size: 0.975rem; line-height: 1.8; margin-bottom: 1rem; }
.article-list { color: var(--text-muted); padding-left: 1.5rem; margin-bottom: 1rem; line-height: 1.8; }
.article-list li { margin-bottom: 0.5rem; }

.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin: 1.5rem 0; }
.stats-box { background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border-color); padding: 1.25rem; border-radius: var(--radius-sm); text-align: center; }
.stat-value { font-size: 1.75rem; font-weight: 800; color: #38bdf8; }
.stat-label { font-size: 0.85rem; color: var(--text-muted); }

/* ==========================================================================
   12. 移动端自适应 (Mobile First Responsiveness)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-title { font-size: 2.35rem; }
  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .pricing-card.popular { transform: none; }
  .support-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-catalog { display: none; }
  .hero-title { font-size: 2rem; }
  .hero-cta { flex-direction: column; width: 100%; }
  .hero-cta .btn { width: 100%; }
  .footer-links { flex-direction: column; gap: 1.25rem; }
  .support-grid { grid-template-columns: 1fr; }
  .page-content { padding: 1.5rem; }
}