/* ==========================================================================
   闪狐机场官网 (Shanhu Cloud) - Neo-Brutalism 新粗野主义 Design System
   ========================================================================== */

:root {
  --bg-main: #FFFDF0;
  --bg-card: #FFFFFF;
  --text-main: #000000;
  --border-color: #000000;
  --border-width: 3px;
  --border-thick: 4px;
  --shadow-hard: 5px 5px 0px #000000;
  --shadow-hard-lg: 8px 8px 0px #000000;
  --shadow-hard-sm: 3px 3px 0px #000000;
  --shadow-pressed: 2px 2px 0px #000000;
  
  /* Neo-Brutalism High Contrast Accents */
  --color-yellow: #FFE600;
  --color-red: #FF5757;
  --color-green: #4ADE80;
  --color-cyan: #00E5FF;
  --color-purple: #C084FC;
  --color-orange: #FB923C;
  --color-gray: #E2E8F0;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* Reset & Base Styles */
* {
  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-family);
  font-weight: 700;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Background Canvas */
#bgCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}

.app-wrapper {
  position: relative;
  z-index: 1;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }

a {
  color: inherit;
  text-decoration: none;
}

/* Top Announcement Banner */
.announcement-bar {
  background-color: var(--color-yellow);
  border-bottom: var(--border-width) solid var(--border-color);
  padding: 0.6rem 1rem;
  font-weight: 800;
  text-align: center;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.announcement-badge {
  background-color: var(--color-red);
  color: #FFFFFF;
  padding: 0.15rem 0.6rem;
  border: 2px solid #000000;
  box-shadow: 2px 2px 0px #000000;
  font-size: 0.8rem;
  border-radius: 4px;
}

/* Header & Sticky Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-main);
  border-bottom: var(--border-width) solid var(--border-color);
  padding: 1rem 0;
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.5rem;
  font-weight: 900;
  background-color: var(--color-yellow);
  padding: 0.4rem 0.8rem;
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard-sm);
  transform: rotate(-1deg);
  transition: transform 0.2s ease;
}

.brand-logo:hover {
  transform: rotate(0deg) scale(1.02);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}

.nav-link {
  font-weight: 800;
  font-size: 1rem;
  padding: 0.3rem 0.6rem;
  border: 2px solid transparent;
  transition: all 0.15s ease;
}

.nav-link:hover {
  background-color: var(--color-cyan);
  border: 2px solid #000000;
  box-shadow: 2px 2px 0px #000000;
  transform: translateY(-2px);
}

/* Neo-Brutalism Buttons */
.btn-neo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 900;
  font-size: 1.1rem;
  padding: 0.85rem 1.75rem;
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  text-align: center;
}

.btn-neo-primary {
  background-color: var(--color-yellow);
  color: #000000;
}

.btn-neo-primary:hover {
  background-color: #ffd000;
  box-shadow: var(--shadow-hard-lg);
  transform: translate(-2px, -2px);
}

.btn-neo-primary:active {
  box-shadow: var(--shadow-pressed);
  transform: translate(3px, 3px);
}

.btn-neo-secondary {
  background-color: var(--color-green);
  color: #000000;
}

.btn-neo-secondary:hover {
  background-color: #38c86d;
  box-shadow: var(--shadow-hard-lg);
  transform: translate(-2px, -2px);
}

.btn-neo-secondary:active {
  box-shadow: var(--shadow-pressed);
  transform: translate(3px, 3px);
}

.btn-neo-red {
  background-color: var(--color-red);
  color: #FFFFFF;
}

.btn-neo-red:hover {
  background-color: #ff3838;
  box-shadow: var(--shadow-hard-lg);
  transform: translate(-2px, -2px);
}

.btn-neo-red:active {
  box-shadow: var(--shadow-pressed);
  transform: translate(3px, 3px);
}

/* Sticker Badges System */
.sticker-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 1.5rem 0;
}

.sticker {
  font-size: 0.95rem;
  font-weight: 900;
  padding: 0.4rem 0.9rem;
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard-sm);
  display: inline-block;
  transition: transform 0.2s ease;
}

.sticker:hover {
  transform: scale(1.08) rotate(0deg) !important;
}

/* Hero Section */
.hero-section {
  padding: 4rem 0 3rem;
  border-bottom: var(--border-width) solid var(--border-color);
  background-color: var(--bg-main);
  position: relative;
}

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

.hero-title-box {
  background-color: var(--color-yellow);
  display: inline-block;
  padding: 0.2rem 0.8rem;
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard);
  transform: rotate(-1.5deg);
  margin-bottom: 1rem;
}

.hero-main-title {
  font-size: 3.5rem;
  margin-bottom: 1.2rem;
  line-height: 1.1;
}

.hero-main-title span {
  background-color: var(--color-red);
  color: #FFFFFF;
  padding: 0 0.4rem;
  border: 3px solid #000000;
  box-shadow: 4px 4px 0px #000000;
}

.hero-subtitle {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1.8rem;
  color: #222222;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  align-items: center;
}

.hero-card-preview {
  background-color: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard-lg);
  padding: 1.75rem;
  transform: rotate(1deg);
}

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

.pulse-dot {
  width: 12px;
  height: 12px;
  background-color: var(--color-green);
  border: 2px solid #000000;
  border-radius: 50%;
  display: inline-block;
  animation: pulse-ring 1.5s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(74, 222, 128, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

/* Section Common */
.section {
  padding: 4.5rem 0;
  border-bottom: var(--border-width) solid var(--border-color);
}

.section-title-wrapper {
  text-align: center;
  margin-bottom: 3rem;
}

.section-tag {
  display: inline-block;
  background-color: var(--color-cyan);
  padding: 0.3rem 0.8rem;
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard-sm);
  font-size: 0.9rem;
  font-weight: 900;
  margin-bottom: 0.75rem;
  transform: rotate(-1deg);
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.section-desc {
  font-size: 1.1rem;
  font-weight: 700;
  color: #444444;
}

/* Node Latency Monitor Section */
.node-monitor-box {
  background-color: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard-lg);
  padding: 2rem;
}

.node-monitor-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: var(--border-width) solid var(--border-color);
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.node-card {
  background-color: #FAFAFA;
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard-sm);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s ease;
}

.node-card:hover {
  background-color: var(--color-yellow);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hard);
}

.node-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.node-name {
  font-size: 0.95rem;
  font-weight: 800;
}

.node-ping {
  font-size: 1.1rem;
  font-weight: 900;
  color: #059669;
  background-color: #ECFDF5;
  padding: 0.15rem 0.5rem;
  border: 2px solid #000000;
}

.node-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  margin-top: 0.6rem;
  padding-top: 0.4rem;
  border-top: 1.5px dashed #000000;
}

/* Violent Contrast Cards */
.contrast-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.contrast-card {
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard-lg);
  padding: 2.25rem;
  position: relative;
}

.contrast-card-bad {
  background-color: #F1F5F9;
  transform: rotate(-1deg);
}

.contrast-card-good {
  background-color: var(--color-yellow);
  transform: rotate(1deg);
}

.contrast-badge {
  position: absolute;
  top: -15px;
  right: 20px;
  font-size: 0.9rem;
  font-weight: 900;
  padding: 0.3rem 0.8rem;
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard-sm);
}

.contrast-list {
  list-style: none;
  margin-top: 1.5rem;
}

.contrast-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 1.05rem;
  font-weight: 800;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.75rem;
  margin-top: 3rem;
}

.feature-card {
  background-color: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard);
  padding: 1.75rem;
  transition: all 0.2s ease;
}

.feature-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-hard-lg);
}

.feature-icon {
  width: 50px;
  height: 50px;
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1rem;
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
  position: relative;
}

.pricing-card {
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard-lg);
  padding: 2.25rem 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: transform 0.2s ease;
}

.pricing-card:hover {
  transform: translateY(-5px);
}

.pricing-popular {
  border-width: var(--border-thick);
  transform: scale(1.03);
}

.graffiti-arrow {
  position: absolute;
  top: -35px;
  right: -20px;
  background-color: var(--color-red);
  color: #FFFFFF;
  padding: 0.3rem 0.7rem;
  border: 2px solid #000000;
  box-shadow: 3px 3px 0px #000000;
  font-weight: 900;
  font-size: 0.85rem;
  transform: rotate(8deg);
  z-index: 10;
}

.price-box {
  margin: 1.5rem 0;
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
}

.price-num {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
}

.price-period {
  font-size: 1.1rem;
  font-weight: 800;
}

.pricing-features {
  list-style: none;
  margin: 1.5rem 0;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
  font-size: 0.95rem;
}

/* FAQ Accordion */
.faq-grid {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.faq-card {
  background-color: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard);
  cursor: pointer;
  transition: all 0.2s ease;
}

.faq-header {
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.15rem;
  font-weight: 800;
}

.faq-icon {
  font-size: 1.3rem;
  transition: transform 0.2s ease;
}

.faq-body {
  padding: 0 1.5rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  color: #333333;
  display: none;
  border-top: 2px dashed #000000;
  padding-top: 1rem;
}

.faq-card.active .faq-body {
  display: block;
}

.faq-card.active .faq-icon {
  transform: rotate(180deg);
}

/* Knowledge Base & Articles Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.article-card {
  background-color: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s ease;
  padding: 1.5rem;
}

.article-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-hard-lg);
  background-color: #FFFFF5;
}

.article-tag {
  display: inline-block;
  background-color: var(--color-cyan);
  padding: 0.2rem 0.6rem;
  border: 2px solid #000000;
  font-size: 0.8rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.article-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.article-excerpt {
  font-size: 0.95rem;
  font-weight: 600;
  color: #444444;
  margin-bottom: 1.2rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  border-top: 2px solid #000000;
  padding-top: 0.75rem;
}

/* Reviews Grid */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
}

.review-card {
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.review-avatar {
  width: 46px;
  height: 46px;
  border: 2px solid #000000;
  background-color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 2px 2px 0px #000000;
}

/* Footer */
.footer {
  background-color: var(--color-yellow);
  border-top: var(--border-width) solid var(--border-color);
  padding: 3.5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: var(--border-width) solid var(--border-color);
  font-size: 0.95rem;
  font-weight: 800;
}

/* Standalone Article Layout Styles */
.article-detail-container {
  max-width: 900px;
  margin: 3rem auto;
  background-color: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard-lg);
  padding: 3rem;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  font-weight: 800;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  font-weight: 500;
  color: #1A1A1A;
}

.article-content h2 {
  font-size: 1.8rem;
  margin: 2rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: var(--border-width) solid var(--border-color);
  background-color: var(--color-yellow);
  display: inline-block;
  padding: 0.2rem 0.6rem;
}

.article-content h3 {
  font-size: 1.35rem;
  margin: 1.5rem 0 0.75rem;
}

.article-content p {
  margin-bottom: 1.25rem;
}

.article-content ul, .article-content ol {
  margin: 1rem 0 1.5rem 2rem;
}

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

.article-content code {
  background-color: var(--color-gray);
  border: 1px solid #000000;
  padding: 0.15rem 0.4rem;
  font-family: monospace;
  font-weight: bold;
}

.article-content pre {
  background-color: #1E293B;
  color: #F8FAFC;
  padding: 1.25rem;
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard-sm);
  overflow-x: auto;
  margin: 1.5rem 0;
  font-family: monospace;
}

.article-cta-box {
  background-color: var(--color-yellow);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-hard);
  padding: 2rem;
  text-align: center;
  margin: 3rem 0;
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .contrast-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  .pricing-popular {
    transform: none;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  h1 { font-size: 2.5rem; }
  .hero-main-title { font-size: 2.75rem; }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none; /* simple mobile nav */
  }
  .article-detail-container {
    padding: 1.5rem;
  }
  .hero-main-title { font-size: 2.25rem; }
}