/* ==========================================================================
   椰皮加速 (YepFast VPN) - 全局样式系统
   域名: yepfastvpn.cyou
   设计主题: 暗黑极速科技 + 椰树热带风 + 白蓝渐变文字 + 动效玻璃浮动卡片
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

:root {
  --bg-main: #060913;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border-color: rgba(56, 189, 248, 0.18);
  --border-glow: rgba(56, 189, 248, 0.45);
  
  --primary-blue: #0072FF;
  --cyan-accent: #38BDF8;
  --sky-light: #BAE6FD;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  --gradient-text: linear-gradient(135deg, #FFFFFF 0%, #70C2FF 50%, #0072FF 100%);
  --gradient-btn: linear-gradient(135deg, #0072FF 0%, #38BDF8 100%);
  --gradient-btn-hover: linear-gradient(135deg, #0056C6 0%, #0284C7 100%);
  --gradient-gold: linear-gradient(135deg, #F59E0B 0%, #FBBF24 100%);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.25);
  --shadow-card: 0 20px 40px -15px rgba(0, 0, 0, 0.6);
  --font-main: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
}

/* Reset & Basic */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-main);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  background: 
    radial-gradient(circle at 15% 20%, rgba(0, 114, 255, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 60%, rgba(56, 189, 248, 0.10) 0%, transparent 50%),
    radial-gradient(circle at 50% 90%, rgba(15, 23, 42, 0.8) 0%, transparent 60%),
    var(--bg-main);
}

/* 椰树元素背景纹理 (SVG Background Accent) */
.coconut-bg-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='600' height='600' viewBox='0 0 800 800'%3E%3Cpath fill='%2338bdf8' d='M400,100 Q450,250 600,200 Q480,300 550,450 Q420,350 400,550 Q380,350 250,450 Q320,300 200,200 Q350,250 400,100 Z'/%3E%3Cpath fill='%230072ff' d='M400,550 Q430,680 410,800 Q390,680 400,550 Z'/%3E%3Cpath fill='%2338bdf8' d='M100,500 C150,400 300,450 250,550 C200,520 150,600 100,500 Z'/%3E%3Cpath fill='%2338bdf8' d='M700,500 C650,400 500,450 550,550 C600,520 650,600 700,500 Z'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 800px 800px;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Typography & White-to-Blue Gradient */
.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

h1, h2, h3, h4 {
  font-weight: 800;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}

a {
  color: var(--cyan-accent);
  text-decoration: none;
  transition: all 0.25s ease;
}

a:hover {
  color: #70C2FF;
}

/* Navigation Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(6, 9, 19, 0.8);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
}

.coconut-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
  flex-shrink: 0;
  overflow: hidden;
}

.coconut-icon svg, .coconut-icon img {
  width: 100%;
  height: 100%;
  display: block;
}

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

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

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

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  outline: none;
}

.btn-primary {
  background: var(--gradient-btn);
  color: #FFFFFF;
  box-shadow: 0 4px 20px rgba(0, 114, 255, 0.4);
}

.btn-primary:hover {
  background: var(--gradient-btn-hover);
  box-shadow: 0 6px 30px rgba(56, 189, 248, 0.6);
  transform: translateY(-2px);
  color: #FFFFFF;
}

.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--cyan-accent);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-recommend {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-recommend:hover {
  background: linear-gradient(135deg, #059669 0%, #047857 100%);
  box-shadow: 0 6px 25px rgba(16, 185, 129, 0.5);
  transform: translateY(-2px);
  color: #FFFFFF;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

/* Hero Section */
.hero-section {
  padding: 90px 0 60px;
  text-align: center;
  position: relative;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-full);
  color: var(--cyan-accent);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #10B981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10B981;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1.1); 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: 3.5rem;
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero-sub {
  max-width: 780px;
  margin: 0 auto 40px;
  font-size: 1.2rem;
  color: var(--text-secondary);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.hero-features-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  list-style: none;
  font-size: 0.95rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.hero-features-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-features-list svg {
  width: 18px;
  height: 18px;
  fill: var(--cyan-accent);
}

/* 实时流量节点 (Live Traffic Nodes Panel) */
.live-nodes-section {
  padding: 40px 0 80px;
}

.glass-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

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

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 992px) {
  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

/* 实时数据仪表盘新模板 (Live Node Monitor Dashboard Template) */
.nodes-metrics-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.metric-card {
  background: rgba(10, 15, 30, 0.65);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  backdrop-filter: blur(8px);
}

.metric-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(0, 114, 255, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan-accent);
  flex-shrink: 0;
}

.metric-icon svg {
  width: 22px;
  height: 22px;
  fill: var(--cyan-accent);
}

.metric-info {
  display: flex;
  flex-direction: column;
}

.metric-title {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.metric-value {
  font-size: 1.35rem;
  font-weight: 800;
  color: #FFFFFF;
}

.nodes-table-wrapper {
  background: rgba(10, 15, 30, 0.65);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow-x: auto;
  backdrop-filter: blur(12px);
}

.nodes-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
  white-space: nowrap;
}

.nodes-table th {
  background: rgba(0, 114, 255, 0.12);
  padding: 16px 22px;
  color: var(--cyan-accent);
  font-weight: 700;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--border-color);
}

.nodes-table td {
  padding: 18px 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  vertical-align: middle;
}

.nodes-table tr:last-child td {
  border-bottom: none;
}

.nodes-table tr:hover td {
  background: rgba(56, 189, 248, 0.08);
}

.ping-bar-outer {
  width: 70px;
  height: 6px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 3px;
  overflow: hidden;
  display: inline-block;
  margin-left: 10px;
  vertical-align: middle;
}

.ping-bar-inner {
  height: 100%;
  background: linear-gradient(90deg, #10B981 0%, #38BDF8 100%);
  border-radius: 3px;
}

.node-card {
  background: rgba(10, 15, 30, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all 0.3s ease;
}

.node-card:hover {
  border-color: var(--cyan-accent);
  transform: translateY(-4px);
  box-shadow: 0 10px 25px -10px rgba(0, 114, 255, 0.3);
}

.node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.node-flag {
  font-size: 1.5rem;
}

.node-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.node-type {
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(0, 114, 255, 0.2);
  color: var(--cyan-accent);
  font-weight: 600;
}

.node-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: #10B981;
  font-weight: 600;
}

.node-stats {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
  background: rgba(0, 0, 0, 0.3);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
}

.stat-label {
  color: var(--text-muted);
}

.stat-value {
  color: var(--sky-light);
  font-family: monospace;
  font-weight: 600;
}

/* 浮动价格表 (Floating Pricing Section) */
.pricing-section {
  padding: 60px 0 100px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
  margin-top: 40px;
}

/* Floating animation for pricing cards */
.floating-card {
  animation: floatCard 6s ease-in-out infinite;
  transition: all 0.35s ease;
}

.floating-card:nth-child(2) {
  animation-delay: 1.5s;
}

.floating-card:nth-child(3) {
  animation-delay: 3s;
}

.floating-card:nth-child(4) {
  animation-delay: 4.5s;
}

@keyframes floatCard {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
  100% { transform: translateY(0px); }
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  backdrop-filter: blur(16px);
}

.pricing-card.popular {
  border-color: var(--cyan-accent);
  box-shadow: var(--shadow-glow);
  background: linear-gradient(180deg, rgba(0, 114, 255, 0.15) 0%, var(--bg-card) 100%);
}

.popular-tag {
  position: absolute;
  top: -14px;
  right: 24px;
  background: var(--gradient-btn);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 40px;
}

.plan-price {
  margin-bottom: 28px;
}

.price-num {
  font-size: 2.8rem;
  font-weight: 900;
  color: #FFFFFF;
}

.price-unit {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.plan-features svg {
  width: 18px;
  height: 18px;
  fill: #10B981;
  flex-shrink: 0;
}

/* Feature Highlights */
.features-section {
  padding: 60px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: all 0.3s ease;
}

.feature-box:hover {
  transform: translateY(-5px);
  border-color: var(--cyan-accent);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(0, 114, 255, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  fill: var(--cyan-accent);
}

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

.feature-box p {
  font-size: 0.93rem;
  color: var(--text-secondary);
}

/* Articles Section */
.articles-section {
  padding: 80px 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--cyan-accent);
  box-shadow: 0 15px 30px -10px rgba(0, 114, 255, 0.25);
}

.article-content {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.tag-badge {
  background: rgba(56, 189, 248, 0.12);
  color: var(--cyan-accent);
  font-size: 0.78rem;
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 600;
}

.article-title {
  font-size: 1.25rem;
  line-height: 1.4;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.article-title a {
  color: var(--text-primary);
}

.article-title a:hover {
  color: var(--cyan-accent);
}

.article-excerpt {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-author-mini {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.author-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0072FF, #38BDF8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 0.85rem;
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

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

/* User Reviews / Testimonials */
.reviews-section {
  padding: 80px 0;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  margin-top: 40px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.review-stars {
  color: #F59E0B;
  font-size: 1.1rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-style: italic;
  line-height: 1.6;
}

.reviewer-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: auto;
}

.reviewer-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--cyan-accent);
}

.reviewer-details {
  display: flex;
  flex-direction: column;
}

.reviewer-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.reviewer-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ Accordion Section */
.faq-section {
  padding: 80px 0 100px;
}

.faq-list {
  max-width: 860px;
  margin: 40px auto 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-question {
  padding: 22px 28px;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.faq-question svg {
  width: 20px;
  height: 20px;
  fill: var(--cyan-accent);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 28px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 28px 24px;
}

/* Article Page Layout */
.article-page {
  padding: 60px 0 100px;
}

.article-header {
  text-align: center;
  max-width: 880px;
  margin: 0 auto 40px;
}

.article-header h1 {
  font-size: 2.5rem;
  line-height: 1.25;
  margin-bottom: 20px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-body {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-card);
}

.article-body h2 {
  font-size: 1.6rem;
  margin: 36px 0 16px;
  color: var(--cyan-accent);
  border-bottom: 1px solid rgba(56, 189, 248, 0.2);
  padding-bottom: 8px;
}

.article-body h3 {
  font-size: 1.25rem;
  margin: 24px 0 12px;
  color: var(--text-primary);
}

.article-body p {
  margin-bottom: 18px;
  font-size: 1.02rem;
  line-height: 1.8;
  color: #CBD5E1;
}

.article-body ul, .article-body ol {
  margin: 16px 0 24px 24px;
  color: #CBD5E1;
}

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

.author-box-large {
  margin: 50px 0 30px;
  padding: 24px;
  background: rgba(0, 114, 255, 0.08);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 20px;
}

.author-box-large .avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0072FF, #38BDF8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.3rem;
  color: #fff;
  flex-shrink: 0;
}

.author-box-large .details h4 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.author-box-large .details p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.internal-links-widget {
  margin-top: 40px;
  padding: 28px;
  background: rgba(15, 23, 42, 0.9);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.internal-links-widget h3 {
  font-size: 1.2rem;
  margin-bottom: 16px;
  color: var(--cyan-accent);
}

.internal-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  list-style: none;
}

.internal-links-grid a {
  display: block;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 6px;
  font-size: 0.88rem;
}

.internal-links-grid a:hover {
  background: rgba(56, 189, 248, 0.15);
  color: #fff;
}

/* ==========================================================================
   页脚 PBN 权重输血管道 (Footer PBN Link Injection System)
   ========================================================================== */
.site-footer {
  background: #03060D;
  border-top: 1px solid var(--border-color);
  padding: 50px 0 30px;
  text-align: center;
  position: relative;
  z-index: 10;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
}

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

.footer-nav a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

/* 低调、美观、小字号的友情链接区 (PBN Link Pipeline) */
.pbn-friend-links {
  margin-top: 10px;
  padding: 12px 24px;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.pbn-friend-links span {
  color: var(--text-muted);
  font-weight: 500;
}

.pbn-friend-links a {
  color: #70C2FF;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s ease;
}

.pbn-friend-links a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-copyright {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 10px;
}

/* Responsive Breakdown */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.8rem;
  }
  .article-body {
    padding: 32px 24px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-sub {
    font-size: 1rem;
  }
  .pbn-friend-links {
    flex-direction: column;
    gap: 8px;
    border-radius: var(--radius-md);
  }
}