/* ----------------------------------------------------
   华纳云 (Huanyu Cloud) - 赛博光效与深邃极光全新背景样式表
   Target Domain: thuanyucloud.sbs
   ---------------------------------------------------- */

:root {
  --bg-dark: #050811;
  --bg-card: rgba(15, 22, 38, 0.75);
  --bg-card-hover: rgba(26, 36, 62, 0.85);
  --accent-gold: #f39c12;
  --accent-gold-light: #f1c40f;
  --accent-gold-glow: rgba(243, 156, 18, 0.4);
  --accent-purple: #8e44ad;
  --accent-cyan: #00d2d3;
  --text-main: #f8fafc;
  --text-muted: #a0aec0;
  --text-dim: #64748b;
  --border-color: rgba(243, 156, 18, 0.22);
  --border-glow: rgba(243, 156, 18, 0.5);
  --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --radius-lg: 18px;
  --radius-md: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;

  /* 全新深邃赛博极光与网格背景风格 */
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(243, 156, 18, 0.15) 0%, transparent 45%),
    radial-gradient(circle at 85% 25%, rgba(142, 68, 173, 0.18) 0%, transparent 50%),
    radial-gradient(circle at 50% 75%, rgba(0, 210, 211, 0.12) 0%, transparent 55%),
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 48px 48px, 48px 48px;
  background-attachment: fixed;
}

/* 鼠标跟随 Canvas 尾翼 */
#cursor-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
}

/* 动态深邃极光晕渲染 */
.aurora-bg-glow {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 1200px;
  height: 650px;
  background: radial-gradient(ellipse at center, rgba(243, 156, 18, 0.2) 0%, rgba(142, 68, 173, 0.15) 40%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}

/* 容器类 */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* 导航栏 */
header.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 76px;
  background: rgba(5, 8, 17, 0.85);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(243, 156, 18, 0.15);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.5px;
}

.logo-badge {
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-purple));
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 20px;
  text-transform: uppercase;
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

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

.nav-links a:hover {
  color: var(--accent-gold);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-recommend {
  background: rgba(142, 68, 173, 0.22);
  border: 1px solid var(--accent-purple);
  color: #e2e8f0;
  padding: 8px 18px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
}

.btn-recommend:hover {
  background: var(--accent-purple);
  color: #fff;
  box-shadow: 0 0 18px rgba(142, 68, 173, 0.5);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-gold), #e67e22);
  color: #050811;
  padding: 9px 22px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 4px 20px var(--accent-gold-glow);
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(243, 156, 18, 0.7);
  background: linear-gradient(135deg, #f1c40f, var(--accent-gold));
}

/* 英雄展厅 Hero Section */
.hero {
  padding-top: 160px;
  padding-bottom: 90px;
  text-align: center;
  position: relative;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(243, 156, 18, 0.12);
  border: 1px solid var(--border-color);
  padding: 6px 18px;
  border-radius: 30px;
  color: var(--accent-gold);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #ffffff 30%, #f39c12 70%, #8e44ad 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto 36px auto;
  font-weight: 400;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin-bottom: 48px;
}

.btn-hero-lg {
  padding: 14px 36px;
  font-size: 1.1rem;
  border-radius: 40px;
}

.btn-hero-secondary {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-main);
  padding: 14px 32px;
  border-radius: 40px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
  transition: var(--transition);
}

.btn-hero-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.stat-item h4 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-gold);
}

.stat-item p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* 核心优势板块 */
.section {
  padding: 80px 0;
  position: relative;
}

.section-title {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
}

.section-desc {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 680px;
  margin: 0 auto 50px auto;
}

/* 单排价格框样式 (PRICING ROW IN ONE ROW) */
.pricing-section {
  background: rgba(5, 8, 17, 0.4);
}

.pricing-row-container {
  width: 100%;
  overflow-x: auto;
  padding-bottom: 20px;
}

.pricing-row {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  gap: 18px;
  min-width: 1000px;
}

.pricing-card {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px 22px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(14px);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-gold);
  box-shadow: 0 14px 35px rgba(243, 156, 18, 0.3);
  background: var(--bg-card-hover);
}

.pricing-card.featured {
  border: 2px solid var(--accent-gold);
  box-shadow: 0 8px 30px var(--accent-gold-glow);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  right: 20px;
  background: linear-gradient(135deg, var(--accent-gold), #e67e22);
  color: #050811;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: 12px;
  text-transform: uppercase;
}

.card-plan-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.card-plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  min-height: 40px;
}

.card-price {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--accent-gold);
  margin-bottom: 20px;
}

.card-price span {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 400;
}

.card-features {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.card-features li {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-features li::before {
  content: "✓";
  color: var(--accent-gold);
  font-weight: 900;
}

.pricing-btn {
  width: 100%;
  text-align: center;
  padding: 12px 0;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: var(--transition);
  background: rgba(243, 156, 18, 0.15);
  color: var(--accent-gold);
  border: 1px solid var(--border-color);
}

.pricing-card:hover .pricing-btn,
.pricing-card.featured .pricing-btn {
  background: linear-gradient(135deg, var(--accent-gold), #e67e22);
  color: #050811;
  border: none;
}

/* 特色网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: var(--transition);
  backdrop-filter: blur(12px);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-purple);
  box-shadow: 0 10px 25px rgba(142, 68, 173, 0.3);
}

.feature-icon {
  width: 54px;
  height: 54px;
  background: rgba(243, 156, 18, 0.12);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  color: var(--accent-gold);
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* SEO 文章展厅网格 */
.articles-section {
  background: rgba(5, 8, 17, 0.6);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  backdrop-filter: blur(12px);
}

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

.article-tag {
  color: var(--accent-gold);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.article-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-card h3 a {
  color: var(--text-main);
  text-decoration: none;
  transition: var(--transition);
}

.article-card h3 a:hover {
  color: var(--accent-gold);
}

.article-excerpt {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 20px;
  line-height: 1.6;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 12px;
}

.article-read-link {
  color: var(--accent-gold);
  text-decoration: none;
  font-weight: 600;
}

/* 用户评价与 FAQ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(12px);
}

.review-stars {
  color: #f1c40f;
  margin-bottom: 12px;
  font-size: 1rem;
}

.review-text {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 0.9rem;
}

.author-info h5 {
  font-size: 0.9rem;
  font-weight: 600;
}

.author-info p {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* FAQ 折叠项 */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(12px);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-answer {
  padding: 0 24px 20px 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  display: none;
  line-height: 1.7;
}

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

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-gold);
}

/* 页脚与 PBN 输血管道 (Footer & PBN Dofollow Links) */
footer.site-footer {
  background: #03050a;
  border-top: 1px solid rgba(243, 156, 18, 0.15);
  padding: 60px 0 30px 0;
  color: var(--text-muted);
  text-align: center;
  position: relative;
  z-index: 10;
}

.footer-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
  list-style: none;
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-nav a:hover {
  color: var(--accent-gold);
}

/* PBN 权重输血管道样式 (DoFollow) */
.pbn-links-area {
  padding: 16px 32px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed rgba(243, 156, 18, 0.3);
  border-radius: 30px;
  display: inline-flex;
  align-items: center;
  gap: 16px;
  margin-top: 10px;
  backdrop-filter: blur(10px);
}

.pbn-label {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.pbn-links-area a {
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.pbn-links-area a:hover {
  color: var(--accent-gold);
  text-decoration: underline;
}

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

.copyright {
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* 响应式断点 */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.6rem; }
  .features-grid, .articles-grid, .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero-title { font-size: 2.1rem; }
  .hero-subtitle { font-size: 1rem; }
  .features-grid, .articles-grid, .reviews-grid { grid-template-columns: 1fr; }
  .hero-buttons { flex-direction: column; width: 100%; }
  .btn-hero-lg, .btn-hero-secondary { width: 100%; }
  .pricing-row { min-width: 100%; flex-direction: column; }
}