/* Warm Editorial Lifestyle Design System for FlashFox.skin */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700&family=Noto+Sans+SC:wght@300;400;500;700&family=Playfair+Display:ital,wght@0,600;0,700;1,400&display=swap');

:root {
  --bg-main: #FBF8F3;        /* 亚麻暖白 (60%) */
  --bg-surface: #F2EDE4;     /* 奶杏浅驼 (20%) */
  --bg-card: #FAF6EF;
  --text-main: #2A2421;      /* 浓缩咖啡深褐 (10%) */
  --text-muted: #6E655F;
  --text-light: #948B83;
  --accent-cta: #A0472E;     /* 陶土红棕 (10%) */
  --accent-cta-hover: #863923;
  --accent-secondary: #5B6348;/* 橄榄苔绿 */
  --accent-secondary-hover: #474E37;
  --divider: #E2D9CC;        /* 浅麦秸灰 */
  
  --font-serif: 'Noto Serif SC', 'Playfair Display', Georgia, serif;
  --font-sans: 'Noto Sans SC', system-ui, -apple-system, sans-serif;

  --shadow-editorial: 0 10px 30px rgba(42, 36, 33, 0.05);
  --shadow-hover: 0 16px 36px rgba(42, 36, 33, 0.09);
  --border-radius-sm: 4px;
  --border-radius-lg: 12px;
}

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

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

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

/* Background Canvas Layer */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  opacity: 0.65;
}

/* Top Announcement Bar */
.top-bar {
  background-color: var(--accent-cta);
  color: #FFFDF9;
  text-align: center;
  padding: 8px 16px;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
}
.top-bar a {
  color: #FFFDF9;
  text-decoration: underline;
  font-weight: 500;
}

/* Navbar */
.site-header {
  border-bottom: 1px solid var(--divider);
  background: rgba(251, 248, 243, 0.92);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}
.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--accent-cta);
  color: #FFFDF9;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.2rem;
}
.brand-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.nav-menu {
  display: flex;
  gap: 28px;
  list-style: none;
}
.nav-link {
  text-decoration: none;
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 400;
  transition: color 0.2s;
  position: relative;
  padding: 4px 0;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-cta);
  transition: width 0.3s ease;
}
.nav-link:hover::after {
  width: 100%;
}
.nav-cta {
  background: var(--accent-cta);
  color: #FFFDF9;
  padding: 9px 22px;
  border-radius: 30px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(160, 71, 46, 0.2);
}
.nav-cta:hover {
  background: var(--accent-cta-hover);
  transform: translateY(-1px);
}

/* Editorial Hero Section */
.hero-section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 60px 32px 80px;
  border-bottom: 1px solid var(--divider);
}
.issue-tag {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--accent-secondary);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.issue-tag::after {
  content: '';
  flex-grow: 1;
  height: 1px;
  background: var(--divider);
  max-width: 120px;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: 3.2rem;
  line-height: 1.25;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
}
.dropcap {
  font-size: 4.5rem;
  float: left;
  line-height: 0.8;
  padding-top: 4px;
  padding-right: 12px;
  padding-bottom: 4px;
  font-family: var(--font-serif);
  color: var(--accent-cta);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  margin-top: 40px;
}
.hero-image-wrapper {
  position: relative;
  border: 1px solid var(--divider);
  padding: 16px;
  background: var(--bg-surface);
  box-shadow: var(--shadow-editorial);
}
.hero-image {
  width: 100%;
  height: 380px;
  object-fit: cover;
  display: block;
  filter: sepia(0.12) contrast(1.02);
}
.hero-quote-card {
  background: var(--bg-surface);
  padding: 36px;
  border-left: 4px solid var(--accent-cta);
  position: relative;
}
.quote-text {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  line-height: 1.6;
  color: var(--text-main);
  font-style: italic;
  margin-bottom: 20px;
}
.hero-cta-group {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.btn-primary-editorial {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--accent-cta);
  color: #FFFDF9;
  text-decoration: none;
  padding: 14px 28px;
  font-size: 1.05rem;
  font-weight: 500;
  border-radius: var(--border-radius-sm);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-editorial);
}
.btn-primary-editorial:hover {
  background: var(--accent-cta-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.editorial-link {
  color: var(--accent-secondary);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px dashed var(--accent-secondary);
  display: inline-block;
  align-self: flex-start;
  transition: color 0.2s;
}
.editorial-link:hover {
  color: var(--accent-cta);
  border-bottom-style: solid;
}

/* Section Wrapper */
.section-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 32px;
}
.section-header {
  margin-bottom: 48px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 2px solid var(--text-main);
  padding-bottom: 16px;
}
.section-title-group .category-label {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--accent-cta);
  text-transform: uppercase;
}
.section-title {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  margin-top: 4px;
}
.section-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 480px;
}

/* Section 3: Node Latency & Status Board */
.node-status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.node-card {
  background: var(--bg-surface);
  border: 1px solid var(--divider);
  padding: 20px;
  border-radius: var(--border-radius-sm);
  transition: all 0.3s ease;
}
.node-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-cta);
}
.node-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.node-location {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 1.05rem;
}
.flag-icon {
  font-size: 1.2rem;
}
.node-type {
  font-size: 0.75rem;
  background: var(--bg-main);
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--text-muted);
  border: 1px solid var(--divider);
}
.node-metrics {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed var(--divider);
}
.ping-value {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-secondary);
}
.ping-value.fast { color: #3B7A57; }
.ping-value.medium { color: #A0472E; }
.node-badge {
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 6px;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #3B7A57;
  display: inline-block;
  box-shadow: 0 0 8px rgba(59, 122, 87, 0.4);
}

/* Section 4: Pricing & Core Advantages */
.pricing-advantages-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.advantages-column h3, .pricing-column h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 24px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--divider);
}
.advantage-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}
.adv-number {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-cta);
  line-height: 1;
}
.adv-content h4 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}
.adv-content p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.pricing-cards {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--divider);
  padding: 24px;
  border-radius: var(--border-radius-sm);
  position: relative;
  transition: all 0.3s ease;
}
.pricing-card.featured {
  border: 2px solid var(--accent-cta);
  background: var(--bg-card);
}
.popular-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  background: var(--accent-cta);
  color: #FFFDF9;
  font-size: 0.75rem;
  padding: 2px 10px;
  border-radius: 12px;
  letter-spacing: 0.05em;
}
.price-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
}
.price-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
}
.price-amount {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-cta);
}
.price-amount span {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: normal;
}
.price-features {
  list-style: none;
  margin: 16px 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.price-features li {
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.price-features li::before {
  content: '✓';
  color: var(--accent-secondary);
  font-weight: bold;
}

/* Section 5: FAQ & Knowledge Base */
.faq-kb-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 48px;
}
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--divider);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
}
.faq-question {
  padding: 16px 20px;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--accent-cta);
  transition: transform 0.3s;
}
.faq-item.active .faq-question::after {
  content: '-';
}
.faq-answer {
  padding: 0 20px 16px;
  color: var(--text-muted);
  font-size: 0.92rem;
  display: none;
  border-top: 1px dashed var(--divider);
  margin-top: -4px;
  padding-top: 12px;
}
.faq-item.active .faq-answer {
  display: block;
}

.kb-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.kb-card {
  background: var(--bg-surface);
  border: 1px solid var(--divider);
  padding: 18px 22px;
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  color: var(--text-main);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.kb-card:hover {
  border-color: var(--accent-cta);
  transform: translateX(4px);
  background: var(--bg-card);
}
.kb-tag {
  font-size: 0.75rem;
  color: var(--accent-cta);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.kb-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin: 6px 0;
  font-weight: 700;
}
.kb-snippet {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Section 6: Testimonials */
.testimonials-slider {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.testimonial-card {
  background: var(--bg-surface);
  border: 1px solid var(--divider);
  padding: 28px;
  border-radius: var(--border-radius-sm);
  position: relative;
}
.quote-icon {
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--divider);
  line-height: 1;
  position: absolute;
  top: 16px;
  right: 20px;
}
.testi-text {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}
.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
}
.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-secondary);
  color: #FFFDF9;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
}
.user-details h5 {
  font-size: 0.95rem;
  font-weight: 600;
}
.user-details span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Article Page Specific Styles */
.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 60px 24px 100px;
}
.article-header {
  border-bottom: 2px solid var(--text-main);
  padding-bottom: 24px;
  margin-bottom: 40px;
}
.article-category {
  font-family: var(--font-serif);
  color: var(--accent-cta);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: 12px;
}
.article-title {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  gap: 20px;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.article-content {
  font-size: 1.05rem;
  line-height: 1.9;
  color: #2A2421;
}
.article-content h2 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--divider);
  color: var(--text-main);
}
.article-content h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin: 24px 0 12px;
  color: var(--accent-secondary);
}
.article-content p {
  margin-bottom: 20px;
}
.article-content ul, .article-content ol {
  margin: 0 0 24px 24px;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content blockquote {
  background: var(--bg-surface);
  border-left: 4px solid var(--accent-cta);
  padding: 20px 24px;
  margin: 28px 0;
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--text-main);
}
.article-cta-box {
  background: var(--bg-surface);
  border: 1px solid var(--divider);
  padding: 32px;
  border-radius: var(--border-radius-sm);
  margin-top: 50px;
  text-align: center;
}
.article-cta-box h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 12px;
}

/* Footer */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--divider);
  padding: 60px 32px 30px;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-brand h4 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--text-main);
  margin-bottom: 12px;
}
.footer-links h5 {
  font-family: var(--font-serif);
  color: var(--text-main);
  margin-bottom: 16px;
  font-size: 1rem;
}
.footer-links ul {
  list-style: none;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover {
  color: var(--accent-cta);
}
.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--divider);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Responsive */
@media (max-width: 992px) {
  .hero-grid, .pricing-advantages-wrapper, .faq-kb-grid, .footer-container {
    grid-template-columns: 1fr;
  }
  .hero-title { font-size: 2.4rem; }
  .header-container { padding: 16px; }
  .nav-menu { display: none; }
}