/* ==========================================================================
   FREECAT (自由猫) - CLASSIFIED REDACTED ARCHIVE DESIGN SYSTEM
   Theme: Cold War Classified Military Archive / Dossier
   Domain: freecatnet.cyou
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Courier+Prime:ital,wght@0,400;0,700;1,400&family=Share+Tech+Mono&family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');

:root {
  /* Color Palette - Cold War Dossier */
  --bg-primary: #0b0d10;
  --bg-secondary: #12151c;
  --bg-tertiary: #191d26;
  --bg-card: #141822;
  --bg-hover: #1f2533;
  
  --border-color: #2b3240;
  --border-active: #404b60;
  --border-red: #8b0000;

  --text-main: #d1d7e0;
  --text-muted: #848e9c;
  --text-bright: #ffffff;
  
  --accent-red: #ff2b2b;
  --accent-red-dark: #990000;
  --accent-amber: #ffb703;
  --accent-green: #00ff66;
  --accent-cyan: #00f0ff;

  --font-mono: 'Courier Prime', 'Share Tech Mono', 'Space Mono', monospace;
  --font-sans: 'Space Mono', 'Courier Prime', monospace;
}

/* Reset & Universal Rules (Absolute Right Angles: 0px Radius) */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* Enforce absolute right angles */
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
}

body {
  background-color: var(--bg-primary);
  background-image: 
    linear-gradient(rgba(18, 21, 28, 0.7) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 21, 28, 0.7) 1px, transparent 1px);
  background-size: 24px 24px;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Scanline Effect Overlay */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(
    rgba(18, 16, 16, 0) 50%, 
    rgba(0, 0, 0, 0.25) 50%
  );
  background-size: 100% 4px;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.4;
}

/* Mouse Trail Canvas Overlay */
#cursor-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9998;
}

/* Typography & Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-mono);
  color: var(--text-bright);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
}

a {
  color: var(--accent-red);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: var(--text-bright);
  background-color: var(--accent-red-dark);
}

p {
  margin-bottom: 1.2rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Classified Stamp Badges */
.stamp {
  display: inline-block;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  border: 2px solid var(--accent-red);
  color: var(--accent-red);
  transform: rotate(-2deg);
  box-shadow: 0 0 10px rgba(255, 43, 43, 0.3);
  margin-bottom: 10px;
  user-select: none;
}

.stamp.declassified {
  border-color: var(--accent-green);
  color: var(--accent-green);
  box-shadow: 0 0 10px rgba(0, 255, 102, 0.3);
  transform: rotate(1.5deg);
}

.stamp.restricted {
  border-color: var(--accent-amber);
  color: var(--accent-amber);
  transform: rotate(-1deg);
}

/* Redacted Text Mask Effect */
.redacted {
  background-color: #111;
  color: #111;
  padding: 2px 6px;
  border-bottom: 1px dashed var(--accent-red);
  cursor: help;
  transition: background-color 0.3s ease, color 0.3s ease;
  user-select: none;
  position: relative;
}

.redacted::after {
  content: " [HOVER TO DECLASSIFY]";
  font-size: 0.65rem;
  color: var(--accent-red);
  position: absolute;
  top: -16px;
  left: 0;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.redacted:hover {
  background-color: transparent;
  color: var(--accent-amber);
}

.redacted:hover::after {
  opacity: 1;
}

/* Dossier Card Container */
.dossier-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  position: relative;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  transition: border-color 0.3s ease, transform 0.2s ease;
}

.dossier-card:hover {
  border-color: var(--accent-red);
}

.dossier-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
}

.dossier-id {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 1px;
}

/* Hard Grid Systems */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

/* Buttons & CTAs */
.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent-red);
  color: var(--bg-primary);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 1rem 2rem;
  border: 2px solid var(--accent-red);
  cursor: pointer;
  box-shadow: 4px 4px 0px rgba(0, 0, 0, 0.8);
  transition: all 0.15s ease;
  position: relative;
  text-decoration: none;
}

.btn-cta:hover {
  background-color: transparent;
  color: var(--accent-red);
  box-shadow: 2px 2px 0px var(--accent-red);
  transform: translate(2px, 2px);
}

.btn-cta-secondary {
  background-color: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 0.8rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-transform: uppercase;
}

.btn-cta-secondary:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
  background-color: rgba(0, 255, 102, 0.05);
}

/* Header & Top Bar */
.top-bar {
  background-color: #07080a;
  border-bottom: 1px solid var(--border-color);
  padding: 0.5rem 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.site-header {
  background-color: var(--bg-secondary);
  border-bottom: 2px solid var(--accent-red-dark);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-bright);
}

.brand-logo span.badge {
  background-color: var(--accent-red);
  color: var(--bg-primary);
  font-size: 0.75rem;
  padding: 2px 6px;
  vertical-align: middle;
}

.main-nav {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.main-nav a {
  color: var(--text-main);
  font-size: 0.9rem;
  text-transform: uppercase;
  padding: 4px 8px;
}

.main-nav a:hover {
  background-color: var(--bg-hover);
  color: var(--accent-green);
}

/* Hero Section */
.hero-section {
  padding: 4rem 0 3rem 0;
  border-bottom: 1px solid var(--border-color);
  position: relative;
  background: radial-gradient(circle at 50% 30%, rgba(255, 43, 43, 0.05) 0%, transparent 70%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-title {
  font-size: 2.5rem;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--text-bright);
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* Realtime Radar Widget */
.radar-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  position: relative;
}

.radar-header {
  font-size: 0.8rem;
  color: var(--accent-green);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
}

.ping-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  padding: 6px 0;
  border-bottom: 1px dashed rgba(255,255,255,0.05);
}

.ping-item .status-online {
  color: var(--accent-green);
}

.ping-item .ping-ms {
  color: var(--accent-cyan);
}

/* Pricing Matrix Table & Cards */
.pricing-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-color);
}

.section-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.section-sub {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 3rem;
  font-size: 0.9rem;
}

.price-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.price-card.featured {
  border: 2px solid var(--accent-red);
  background: var(--bg-card);
}

.price-title {
  font-size: 1.3rem;
  color: var(--text-bright);
  margin-bottom: 0.5rem;
}

.price-val {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent-green);
  margin: 1rem 0;
}

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

.price-features {
  list-style: none;
  margin: 1.5rem 0;
}

.price-features li {
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 0.85rem;
}

.price-features li::before {
  content: "[+] ";
  color: var(--accent-green);
}

/* Articles Knowledge Hub */
.articles-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-color);
}

.article-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  transition: all 0.2s ease;
}

.article-card:hover {
  border-color: var(--accent-amber);
}

.article-tag {
  font-size: 0.75rem;
  color: var(--accent-amber);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.article-title-link {
  color: var(--text-bright);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  display: block;
}

.article-title-link:hover {
  color: var(--accent-red);
  background: transparent;
}

.article-snippet {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* User Reviews Section */
.testimonials-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.review-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
}

.review-user {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--accent-cyan);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}

/* FAQ Accordion */
.faq-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-color);
}

.faq-item {
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  margin-bottom: 1rem;
}

.faq-question {
  padding: 1.2rem 1.5rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-question:hover {
  color: var(--accent-green);
}

.faq-answer {
  padding: 0 1.5rem 1.2rem 1.5rem;
  display: none;
  color: var(--text-muted);
  border-top: 1px dashed var(--border-color);
  font-size: 0.9rem;
}

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

.faq-item.active .faq-question {
  color: var(--accent-red);
}

/* Article Detail Page Layout */
.article-page {
  padding: 3rem 0;
}

.article-body {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.article-body h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--text-bright);
}

.article-body h2 {
  font-size: 1.4rem;
  margin: 2rem 0 1rem 0;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  color: var(--accent-amber);
}

.article-body h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.75rem 0;
  color: var(--text-bright);
}

.article-body ul, .article-body ol {
  margin: 1rem 0 1.5rem 1.5rem;
  color: var(--text-main);
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.key-links-box {
  background: var(--bg-tertiary);
  border: 1px solid var(--accent-red);
  padding: 1.5rem;
  margin: 2rem 0;
}

.key-links-box h4 {
  color: var(--accent-red);
  margin-bottom: 1rem;
}

.key-links-box ul {
  list-style: none;
  margin: 0;
}

.key-links-box li {
  margin-bottom: 0.5rem;
}

/* FOOTER PBN PIPELINE (页脚 PBN 权重精准输血管道) */
footer.pbn-footer {
  background-color: #060709;
  border-top: 2px solid var(--border-color);
  padding: 2.5rem 0 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
}

.footer-pbn-title {
  font-size: 0.75rem;
  letter-spacing: 2px;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  opacity: 0.7;
}

.pbn-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.25rem;
  max-width: 1000px;
  margin: 0 auto;
}

.pbn-link {
  color: var(--text-muted);
  font-size: 0.75rem;
  opacity: 0.65;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.pbn-link:hover {
  opacity: 1;
  color: var(--accent-green);
  background-color: transparent;
  text-decoration: underline;
}

.footer-copy {
  margin-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 1rem;
  width: 100%;
  text-align: center;
  font-size: 0.7rem;
  color: rgba(255,255,255,0.3);
}

/* Mobile Responsive */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .site-header .header-inner {
    flex-direction: column;
    gap: 1rem;
  }

  .main-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .article-body {
    padding: 1.25rem;
  }
}