/* ==========================================================================
   特朗普云 (TrumpYun) - 官方落地页样式表
   Design Style: Dark Cyber Midnight + Golden Lux Accents
   Domain: trumpyun.cyou
   ========================================================================== */

:root {
  --bg-dark: #0A0D16;
  --bg-card: #121726;
  --bg-card-hover: #1A2136;
  --bg-header: rgba(10, 13, 22, 0.88);
  
  --primary-gold: #F59E0B;
  --primary-gold-hover: #D97706;
  --primary-gold-light: #FDE68A;
  --primary-gold-glow: rgba(245, 158, 11, 0.25);
  
  --text-main: #F9FAFB;
  --text-muted: #9CA3AF;
  --text-dim: #6B7280;
  
  --border-dark: rgba(255, 255, 255, 0.08);
  --border-gold: rgba(245, 158, 11, 0.3);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 页面背景微光遮罩 */
.bg-grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  background: 
    radial-gradient(circle at 50% 0%, rgba(245, 158, 11, 0.08) 0%, transparent 60%),
    radial-gradient(circle at 80% 40%, rgba(59, 130, 246, 0.04) 0%, transparent 50%);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   Header 导航栏
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: var(--bg-header);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dark);
  padding: 16px 0;
  transition: var(--transition-normal);
}

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

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

.brand-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.brand-text {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.brand-text span {
  color: var(--primary-gold);
}

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

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

.nav-link:hover {
  color: var(--primary-gold);
}

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

/* 按钮通用基础 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-gold);
  color: #000000;
  box-shadow: 0 4px 14px var(--primary-gold-glow);
}

.btn-primary:hover {
  background: #FBBF24;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}

.btn-recommend {
  background: rgba(245, 158, 11, 0.12);
  color: var(--primary-gold);
  border: 1px solid var(--border-gold);
}

.btn-recommend:hover {
  background: rgba(245, 158, 11, 0.22);
  transform: translateY(-2px);
  color: #FFFFFF;
}

.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-dark);
}

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

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
}

/* ==========================================================================
   Hero Section 英雄区 (深度还原截图排版)
   ========================================================================== */
.hero {
  padding-top: 140px;
  padding-bottom: 80px;
  text-align: center;
}

.hero-badge-wrap {
  display: inline-block;
  margin-bottom: 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 20px;
  border-radius: var(--radius-pill);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid var(--border-gold);
  color: var(--primary-gold-light);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 28px;
  letter-spacing: -1px;
}

.hero-title .highlight {
  color: var(--primary-gold);
  background: linear-gradient(135deg, #FDE68A 0%, #F59E0B 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  max-width: 860px;
  margin: 0 auto 36px;
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-muted);
  text-align: center;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

/* ==========================================================================
   通用 Section 样式
   ========================================================================== */
.section {
  padding: 90px 0;
  border-top: 1px solid var(--border-dark);
}

.section-header-wrap {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--primary-gold);
  letter-spacing: 2px;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

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

/* ==========================================================================
   核心特点 (Features Grid)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-gold);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.feature-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-sm);
  background: rgba(245, 158, 11, 0.12);
  color: var(--primary-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

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

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-normal);
}

.pricing-card:hover {
  border-color: rgba(245, 158, 11, 0.5);
  transform: translateY(-4px);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.08) 0%, var(--bg-card) 100%);
  border: 2px solid var(--primary-gold);
  box-shadow: 0 10px 40px var(--primary-gold-glow);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gold);
  color: #000;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pricing-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.pricing-price {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--primary-gold);
  margin-bottom: 4px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pricing-price span {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
}

.pricing-period {
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-dark);
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-features li strong {
  color: var(--text-main);
}

/* ==========================================================================
   节点列表 (Node Status Preview)
   ========================================================================== */
.nodes-container {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  transition: var(--transition-fast);
}

.node-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border-gold);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.node-flag {
  font-size: 1.4rem;
}

.node-name {
  font-weight: 700;
  font-size: 0.95rem;
}

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

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

.node-ping {
  font-weight: 800;
  font-size: 0.9rem;
  color: #10B981;
}

.node-live {
  font-size: 0.72rem;
  color: #10B981;
}

/* ==========================================================================
   文章展示区 (Articles Section)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
}

.article-card:hover {
  border-color: var(--border-gold);
  transform: translateY(-4px);
}

.article-tag {
  font-size: 0.78rem;
  color: var(--primary-gold);
  font-weight: 700;
  margin-bottom: 8px;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.6;
  flex-grow: 1;
}

.article-link {
  color: var(--primary-gold);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition-fast);
}

.article-link:hover {
  color: #FBBF24;
  gap: 8px;
}

/* ==========================================================================
   用户评价 (User Reviews)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 28px;
  position: relative;
}

.testimonial-stars {
  color: var(--primary-gold);
  font-size: 1rem;
  margin-bottom: 14px;
}

.testimonial-quote {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(245, 158, 11, 0.2);
  color: var(--primary-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
}

.user-name {
  font-weight: 700;
  font-size: 0.92rem;
}

.user-role {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ==========================================================================
   常见问题 (FAQ Section)
   ========================================================================== */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item.active {
  border-color: var(--border-gold);
}

.faq-question {
  padding: 22px 28px;
  font-weight: 700;
  font-size: 1.05rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.faq-toggle {
  font-size: 1.4rem;
  color: var(--primary-gold);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 28px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 24px;
}

/* ==========================================================================
   文章详情页样式 (Article Body Styles)
   ========================================================================== */
.article-content-body {
  padding-top: 130px;
  padding-bottom: 80px;
  max-width: 880px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.breadcrumb {
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--primary-gold);
}

.article-content-body h1 {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 20px;
}

.article-content-body h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-top: 40px;
  margin-bottom: 18px;
  color: var(--primary-gold-light);
  border-bottom: 1px solid var(--border-dark);
  padding-bottom: 8px;
}

.article-content-body p {
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.article-content-body ul, .article-content-body ol {
  margin-bottom: 24px;
  padding-left: 24px;
  color: var(--text-muted);
  font-size: 1rem;
}

.article-content-body li {
  margin-bottom: 10px;
  line-height: 1.7;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(18, 23, 38, 0.9) 100%);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-md);
  padding: 32px;
  margin: 36px 0;
  text-align: center;
}

.article-cta-box h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

/* ==========================================================================
   页脚 PBN 输血管道 (Requirement 2)
   ========================================================================== */
.footer {
  background: #06080F;
  border-top: 1px solid var(--border-dark);
  padding: 36px 0;
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.footer-pbn-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer-pbn-links label {
  color: var(--text-muted);
  font-weight: 600;
}

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

.footer-pbn-links a:hover {
  color: var(--primary-gold);
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ==========================================================================
   响应式适配 (Responsive Media Queries)
   ========================================================================== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }

  .hero-desc {
    font-size: 0.98rem;
  }

  .section-title {
    font-size: 1.7rem;
  }

  .pricing-grid, .features-grid, .articles-grid, .testimonials-grid {
    grid-template-columns: 1fr;
  }
}