/* 泰山机场 (Taishan JC) - Modern Cyber Mount Tai Theme */

:root {
  --bg-dark: #070a12;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border-color: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(234, 179, 8, 0.4);
  
  --primary: #eab308; /* 泰山金 */
  --primary-hover: #facc15;
  --primary-glow: rgba(234, 179, 8, 0.3);
  
  --secondary: #6366f1; /* 皇家靛紫 */
  --accent: #10b981; /* 安全绿 */
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: all 0.35s 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;
}

/* 粒子与鼠标尾翼 Canvas Container */
#mouse-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
}

/* 渐变背景光晕 */
.bg-glow-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1;
  pointer-events: none;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.35;
}

.orb-1 {
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, #6366f1 0%, #4338ca 100%);
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #eab308 0%, #d97706 100%);
  top: 600px;
  left: -150px;
}

.orb-3 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #059669 0%, #047857 100%);
  top: 1600px;
  right: -150px;
}

/* 导航栏 Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 10, 18, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.5px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px var(--primary-glow);
}

.logo-icon svg, .logo-icon i {
  color: #000;
  font-size: 1.2rem;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

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

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

.nav-btn-group {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* 按钮通用组件 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #000;
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(245, 158, 11, 0.5);
}

.btn-recommend {
  background: rgba(99, 102, 241, 0.18);
  color: #818cf8;
  border: 1px solid rgba(99, 102, 241, 0.4);
  backdrop-filter: blur(8px);
}

.btn-recommend:hover {
  background: rgba(99, 102, 241, 0.35);
  border-color: #a5b4fc;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.4);
}

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

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--text-muted);
}

/* 图5针对性修改：英雄区 Hero Section 底层背景色彩重构 */
.hero-wrapper {
  background: radial-gradient(ellipse 130% 90% at 50% -10%, #1e1b4b 0%, #0f172a 45%, #070a12 100%);
  border-bottom: 1px solid rgba(99, 102, 241, 0.2);
  position: relative;
  overflow: hidden;
}

.hero {
  position: relative;
  padding: 6.5rem 1.5rem 4.5rem;
  max-width: 1240px;
  margin: 0 auto;
  text-align: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1.2rem;
  border-radius: 50px;
  background: rgba(99, 102, 241, 0.2);
  border: 1px solid rgba(165, 180, 252, 0.4);
  color: #c7d2fe;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 1.8rem;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
}

.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 1.6rem;
  background: linear-gradient(180deg, #ffffff 0%, #e2e8f0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title .gradient-span {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.18rem;
  color: #cbd5e1;
  max-width: 780px;
  margin: 0 auto 2.8rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.hero-actions .btn {
  padding: 1rem 2.4rem;
  font-size: 1.05rem;
}

/* 统计特征条 Stats Bar */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.stat-card {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  text-align: center;
  backdrop-filter: blur(12px);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--primary);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

/* 图1针对性修改：核心优势 Features Section 排列成单行一排格式 (Single Row 4 Columns) */
.section {
  padding: 5.5rem 1.5rem;
  max-width: 1240px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  color: var(--primary);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--text-main);
}

/* 强制单排一行 4 列 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.2rem 1.6rem;
  transition: var(--transition);
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(99, 102, 241, 0.5);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.6);
}

.feature-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(234, 179, 8, 0.2), rgba(99, 102, 241, 0.2));
  border: 1px solid rgba(234, 179, 8, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.4rem;
}

.feature-icon-wrapper i {
  font-size: 1.5rem;
  color: var(--primary);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.85rem;
  color: var(--text-main);
}

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

/* 核心重点：横向一排价格卡片 (Single Row Price Cards) */
.pricing-wrapper {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.4rem;
  margin-top: 2.5rem;
}

@media (max-width: 1024px) {
  .pricing-wrapper {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .pricing-wrapper {
    grid-template-columns: 1fr;
  }
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.2rem 1.6rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(12px);
}

.price-card:hover {
  transform: translateY(-7px);
  border-color: rgba(234, 179, 8, 0.5);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.65);
}

.price-card.popular {
  border: 2px solid var(--primary);
  background: rgba(234, 179, 8, 0.06);
}

.popular-badge {
  position: absolute;
  top: -14px;
  right: 20px;
  background: linear-gradient(135deg, var(--primary), #d97706);
  color: #000;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 0.3rem 0.9rem;
  border-radius: 20px;
  text-transform: uppercase;
}

.plan-name {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  min-height: 2.6rem;
}

.price-box {
  margin: 1.5rem 0;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
}

.price-val {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

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

.plan-features {
  list-style: none;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.plan-features li {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.plan-features li i {
  color: var(--primary);
  font-size: 0.9rem;
  flex-shrink: 0;
}

/* 图4针对性修改：文章网格 6 个卡片必须带精美封面图片 */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
}

@media (max-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
}

.article-thumb {
  width: 100%;
  height: 190px;
  overflow: hidden;
  position: relative;
}

.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.article-card:hover .article-thumb img {
  transform: scale(1.06);
}

.article-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  justify-content: space-between;
}

.article-tag {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary);
  background: rgba(234, 179, 8, 0.12);
  border: 1px solid rgba(234, 179, 8, 0.25);
  padding: 0.25rem 0.7rem;
  border-radius: 6px;
  width: fit-content;
  margin-bottom: 0.85rem;
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.75rem;
  line-height: 1.45;
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1.2rem;
}

.article-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 0.85rem;
  margin-top: auto;
}

/* 用户评价 Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  backdrop-filter: blur(12px);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, #475569, #334155);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--primary);
  font-size: 1.15rem;
  border: 1px solid rgba(234, 179, 8, 0.35);
}

.user-meta h4 {
  font-size: 1rem;
  font-weight: 800;
}

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

.stars {
  color: #fbbf24;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.comment {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* FAQ 常见问题折叠面板 */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

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

.faq-item.active {
  border-color: rgba(234, 179, 8, 0.45);
}

.faq-question {
  padding: 1.35rem 1.6rem;
  font-weight: 800;
  font-size: 1.08rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.faq-toggle {
  font-size: 1.3rem;
  transition: transform 0.3s ease;
  color: var(--primary);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
  padding: 0 1.6rem;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  transition: max-height 0.35s cubic-bezier(1, 0, 1, 0);
  padding: 0 1.6rem 1.35rem;
}

/* 核心要求 2：页脚 PBN 权重精准输血管道 */
footer {
  background: #03060c;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3.5rem 1.5rem 2.2rem;
  text-align: center;
  position: relative;
  z-index: 10;
}

.footer-container {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.6rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.25rem;
  font-weight: 800;
}

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

.footer-copy {
  font-size: 0.88rem;
  color: var(--text-dim);
}

/* 友情链接输送区 - 彻底纠正跳转目标为图3 (jichangreview.net) */
.pbn-links-area {
  margin-top: 1rem;
  padding-top: 1.2rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.pbn-links-area span {
  color: rgba(255, 255, 255, 0.2);
}

.pbn-links-area a {
  color: #64748b;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* 文章详情页通用样式 Article Container */
.article-container {
  max-width: 880px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 6.5rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 2rem;
}

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

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

.article-header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
}

.article-header h1 {
  font-size: 2.3rem;
  font-weight: 900;
  line-height: 1.35;
  margin-bottom: 1rem;
  background: linear-gradient(180deg, #ffffff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.article-meta {
  display: flex;
  gap: 1.5rem;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.article-body {
  font-size: 1.08rem;
  line-height: 1.88;
  color: #cbd5e1;
}

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: #f8fafc;
  margin: 2.4rem 0 1rem;
  border-left: 4px solid var(--primary);
  padding-left: 0.85rem;
}

.article-body h3 {
  font-size: 1.28rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 1.9rem 0 0.85rem;
}

.article-body p {
  margin-bottom: 1.5rem;
}

.article-body ul, .article-body ol {
  margin-bottom: 1.6rem;
  padding-left: 1.6rem;
}

.article-body li {
  margin-bottom: 0.55rem;
}

.article-body blockquote {
  background: rgba(234, 179, 8, 0.06);
  border-left: 4px solid var(--primary);
  padding: 1.2rem 1.4rem;
  margin: 1.6rem 0;
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: var(--text-muted);
}

.article-cta {
  background: linear-gradient(135deg, rgba(234, 179, 8, 0.12), rgba(99, 102, 241, 0.15));
  border: 1px solid rgba(234, 179, 8, 0.35);
  border-radius: var(--radius-md);
  padding: 2.2rem;
  text-align: center;
  margin: 3.2rem 0;
}

.article-cta h3 {
  font-size: 1.45rem;
  margin-bottom: 0.5rem;
  color: #fff;
}

.article-cta p {
  color: var(--text-muted);
  font-size: 0.98rem;
  margin-bottom: 1.6rem;
}

.related-articles {
  margin-top: 4rem;
  padding-top: 2.2rem;
  border-top: 1px solid var(--border-color);
}

.related-articles h3 {
  font-size: 1.35rem;
  margin-bottom: 1.6rem;
}