/* 
  HUAJI AIRPORT (huajic.homes) - BRUTALIST MONOLITH DESIGN SYSTEM 
  Style: Heavy Raw Concrete & Fortress Brutalism
  Base Color: Raw Ore Dark Gray #1F2023
  Border: 2px Solid Hard Deep Black #000000
  Accent: Industrial Warning Yellow #FFC700
  Border-Radius: STRICTLY 0px EVERYWHERE
*/

@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@600;700&family=Noto+Sans+SC:wght@500;700;900&family=Space+Grotesk:wght@700;900&display=swap');

:root {
  --bg-concrete: #1F2023;
  --bg-block: #282A2E;
  --bg-block-alt: #161719;
  --border-black: #000000;
  --border-thick: 2px solid #000000;
  --border-accent: 2px solid #FFC700;
  --text-main: #EAEAEA;
  --text-muted: #A0A5AD;
  --text-dark: #000000;
  --warning-yellow: #FFC700;
  --warning-yellow-hover: #E6B200;
  --alert-red: #E63946;
  --status-green: #2A9D8F;
  --font-heading: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', sans-serif;
  --font-mono: 'Chakra Petch', monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* STRICT BRUTALISM: NO ROUNDED CORNERS */
  box-shadow: none !important; /* NO GLOW OR SOFT SHADOWS */
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-concrete);
  color: var(--text-main);
  font-family: var(--font-body);
  cursor: auto;
}

body {
  background-color: var(--bg-concrete);
  /* Concrete subtle grainy texture overlay */
  background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 0);
  background-size: 16px 16px;
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* CUSTOM WINGED BRUTALIST CURSOR TRAIL CONTAINER */
#brutalist-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 24px;
  height: 24px;
  pointer-events: none;
  z-index: 99999;
  transform: translate(-50%, -50%);
  transition: transform 0.05s linear;
}

#brutalist-cursor svg {
  width: 100%;
  height: 100%;
  fill: var(--warning-yellow);
  stroke: var(--border-black);
  stroke-width: 2px;
  filter: drop-shadow(2px 2px 0px #000);
}

.cursor-trail {
  position: fixed;
  width: 8px;
  height: 8px;
  background-color: var(--warning-yellow);
  border: 1px solid #000;
  pointer-events: none;
  z-index: 99998;
  opacity: 0.8;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* TYPOGRAPHY */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  color: var(--text-main);
  line-height: 1.1;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.3rem, 2.5vw, 2rem);
}

p {
  color: var(--text-muted);
  font-size: 1rem;
}

a {
  color: var(--warning-yellow);
  text-decoration: none;
  font-weight: bold;
}

a:hover {
  text-decoration: underline;
}

/* HARD BRUTALIST UTILITIES */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.block-box {
  background-color: var(--bg-block);
  border: var(--border-thick);
  padding: 1.8rem;
  position: relative;
}

.block-box-alt {
  background-color: var(--bg-block-alt);
  border: var(--border-thick);
  padding: 1.8rem;
  position: relative;
}

.warning-badge {
  display: inline-block;
  background-color: var(--warning-yellow);
  color: var(--text-dark);
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border: 1px solid var(--border-black);
  margin-bottom: 0.5rem;
}

.warning-tag {
  background-color: var(--warning-yellow);
  color: #000;
  font-weight: 900;
  font-family: var(--font-mono);
  padding: 2px 8px;
  font-size: 0.8rem;
  border: 1px solid #000;
}

/* BUTTONS */
.btn-brutal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--warning-yellow);
  color: var(--text-dark);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.15rem;
  padding: 1rem 2rem;
  border: var(--border-thick);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: transform 0.1s ease, background-color 0.1s ease;
  text-decoration: none;
  position: relative;
}

.btn-brutal:hover {
  background-color: var(--warning-yellow-hover);
  transform: translate(-2px, -2px);
  text-decoration: none;
  outline: 2px solid #000;
}

.btn-brutal:active {
  transform: translate(0, 0);
}

.btn-brutal-secondary {
  background-color: var(--bg-block-alt);
  color: var(--text-main);
  border: var(--border-thick);
}

.btn-brutal-secondary:hover {
  background-color: #33363B;
  color: var(--warning-yellow);
}

/* HEADER & NAV */
.top-warning-bar {
  background-color: var(--warning-yellow);
  color: var(--text-dark);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.4rem 0;
  border-bottom: var(--border-thick);
  text-align: center;
  letter-spacing: 0.05em;
  overflow: hidden;
  white-space: nowrap;
}

.top-warning-bar marquee, .top-warning-bar .ticker {
  font-weight: 900;
}

header.brutalist-nav {
  background-color: var(--bg-concrete);
  border-bottom: var(--border-thick);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo .logo-icon {
  background-color: var(--warning-yellow);
  color: #000;
  font-weight: 900;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: var(--border-thick);
}

.brand-logo .logo-text {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.6rem;
  color: var(--text-main);
  letter-spacing: -0.03em;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-main);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  text-transform: uppercase;
}

.nav-links a:hover {
  color: var(--warning-yellow);
  text-decoration: none;
}

.mobile-menu-btn {
  display: none;
  background-color: var(--warning-yellow);
  border: var(--border-thick);
  font-weight: 900;
  padding: 0.5rem 0.8rem;
  cursor: pointer;
  color: #000;
  font-family: var(--font-mono);
}

/* HERO SECTION */
.hero-section {
  padding: 4rem 0 3rem 0;
  border-bottom: var(--border-thick);
  background: radial-gradient(circle at 80% 20%, #2A2C32 0%, var(--bg-concrete) 70%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
}

.hero-badge-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.hero-title {
  margin-bottom: 1.5rem;
}

.hero-title span.highlight {
  color: var(--warning-yellow);
  background-color: #000;
  padding: 0 0.4rem;
  border: 1px solid var(--warning-yellow);
}

.hero-desc {
  font-size: 1.15rem;
  line-height: 1.7;
  margin-bottom: 2rem;
  color: var(--text-main);
  border-left: 4px solid var(--warning-yellow);
  padding-left: 1rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.fortress-card {
  background-color: var(--bg-block-alt);
  border: var(--border-thick);
  padding: 2rem;
  position: relative;
}

.fortress-card::before {
  content: "SECURITY SPEC: LEVEL-5";
  position: absolute;
  top: -12px;
  right: 15px;
  background-color: var(--warning-yellow);
  color: #000;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 900;
  padding: 2px 6px;
  border: 1px solid #000;
}

.stat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}

.stat-item {
  background-color: var(--bg-block);
  border: var(--border-thick);
  padding: 1rem;
  text-align: center;
}

.stat-val {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--warning-yellow);
}

.stat-lbl {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* FEATURES MATRIX */
.section-padding {
  padding: 4.5rem 0;
  border-bottom: var(--border-thick);
}

.section-header {
  margin-bottom: 3rem;
  position: relative;
}

.section-header h2 {
  display: inline-block;
  background-color: var(--bg-block);
  border: var(--border-thick);
  padding: 0.5rem 1.5rem;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background-color: var(--bg-block);
  border: var(--border-thick);
  padding: 2rem;
  transition: transform 0.15s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--warning-yellow);
}

.feature-icon {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--warning-yellow);
  margin-bottom: 1rem;
}

.feature-card h3 {
  margin-bottom: 0.8rem;
}

/* NODES / SERVER STATUS SHOWCASE */
.node-matrix-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.node-item {
  background-color: var(--bg-block-alt);
  border: var(--border-thick);
  padding: 1.2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.node-info {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.node-flag {
  font-family: var(--font-mono);
  font-weight: 900;
  background-color: var(--bg-block);
  border: 1px solid #000;
  padding: 4px 8px;
  font-size: 0.85rem;
  color: var(--warning-yellow);
}

.node-name {
  font-weight: 700;
  font-size: 0.95rem;
}

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

.node-ping {
  font-family: var(--font-mono);
  font-weight: 900;
  color: var(--status-green);
  font-size: 0.9rem;
}

/* PRICING TABLE */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.pricing-card {
  background-color: var(--bg-block);
  border: var(--border-thick);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.featured {
  background-color: #2D2F35;
  border: 2px solid var(--warning-yellow);
}

.pricing-card.featured::before {
  content: "★ 绝大多数用户首选推荐 ★";
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--warning-yellow);
  color: #000;
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 0.75rem;
  padding: 3px 12px;
  border: 1px solid #000;
  white-space: nowrap;
}

.price-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.price-amount {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 900;
  color: var(--warning-yellow);
  line-height: 1;
  margin: 1rem 0;
}

.price-amount span {
  font-size: 1rem;
  color: var(--text-muted);
  font-family: var(--font-body);
}

.price-features {
  list-style: none;
  margin: 1.5rem 0 2rem 0;
  flex-grow: 1;
}

.price-features li {
  padding: 0.6rem 0;
  border-bottom: 1px solid #34373D;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.price-features li::before {
  content: "■";
  color: var(--warning-yellow);
  font-size: 0.7rem;
}

/* ARTICLES SHOWCASE SECTION */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.8rem;
}

.article-card {
  background-color: var(--bg-block);
  border: var(--border-thick);
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease;
}

.article-card:hover {
  border-color: var(--warning-yellow);
}

.article-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
}

.article-card h3 {
  font-size: 1.25rem;
  line-height: 1.4;
  margin-bottom: 1rem;
}

.article-card h3 a {
  color: var(--text-main);
  text-decoration: none;
}

.article-card h3 a:hover {
  color: var(--warning-yellow);
}

.article-excerpt {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.article-link {
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 0.9rem;
  color: var(--warning-yellow);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* TESTIMONIALS (USER REVIEWS) */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.review-card {
  background-color: var(--bg-block-alt);
  border: var(--border-thick);
  padding: 1.8rem;
  position: relative;
}

.review-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  border-bottom: 1px solid #333;
  padding-bottom: 0.75rem;
}

.reviewer-name {
  font-family: var(--font-mono);
  font-weight: 900;
  color: var(--text-main);
}

.reviewer-tag {
  background-color: #33363B;
  color: var(--warning-yellow);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 2px 6px;
  border: 1px solid #000;
}

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

.rating-stars {
  color: var(--warning-yellow);
  margin-top: 0.8rem;
  font-size: 1rem;
}

/* FAQ ACCORDION */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--bg-block);
  border: var(--border-thick);
}

.faq-question {
  padding: 1.2rem 1.5rem;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.15rem;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-question:hover {
  background-color: #303338;
}

.faq-toggle-icon {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--warning-yellow);
}

.faq-answer {
  padding: 0 1.5rem 1.5rem 1.5rem;
  color: var(--text-muted);
  line-height: 1.7;
  display: none;
  border-top: 1px dashed #444;
  margin-top: 0.5rem;
  padding-top: 1rem;
}

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

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

/* ARTICLE DETAILED PAGE STYLING */
.article-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.article-header {
  background-color: var(--bg-block);
  border: var(--border-thick);
  padding: 2.5rem;
  margin-bottom: 2.5rem;
}

.article-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 1rem;
  line-height: 1.25;
}

.article-content {
  background-color: var(--bg-block-alt);
  border: var(--border-thick);
  padding: 2.5rem;
  line-height: 1.8;
  font-size: 1.05rem;
  color: #D1D5DB;
}

.article-content h2 {
  font-size: 1.6rem;
  margin: 2rem 0 1rem 0;
  color: var(--warning-yellow);
  border-left: 4px solid var(--warning-yellow);
  padding-left: 0.75rem;
}

.article-content h3 {
  font-size: 1.3rem;
  margin: 1.5rem 0 0.8rem 0;
  color: var(--text-main);
}

.article-content p {
  margin-bottom: 1.25rem;
  color: #D1D5DB;
}

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

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

.article-cta-box {
  background-color: var(--bg-block);
  border: 2px solid var(--warning-yellow);
  padding: 2rem;
  margin: 2.5rem 0;
  text-align: center;
}

.internal-link-box {
  background-color: var(--bg-block);
  border: var(--border-thick);
  padding: 1.5rem;
  margin: 2rem 0;
}

.internal-link-box h4 {
  color: var(--warning-yellow);
  margin-bottom: 0.8rem;
}

.internal-link-box ul {
  list-style: square;
  margin-left: 1.2rem;
}

/* FOOTER & PBN LINKS SECTION (SPECIFIC USER REQUIREMENT) */
footer.brutalist-footer {
  background-color: #121315;
  border-top: var(--border-thick);
  padding: 3rem 0 2rem 0;
  text-align: center;
}

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

.footer-brand {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.4rem;
  color: var(--text-main);
}

.footer-pbn-area {
  width: 100%;
  max-width: 1000px;
  border-top: 1px solid #2B2D33;
  padding-top: 1.5rem;
  margin-top: 1rem;
}

.footer-pbn-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #666C75;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.pbn-links-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.2rem;
  font-size: 0.8rem;
}

.pbn-links-grid a {
  color: #8A909A;
  font-weight: 500;
  font-size: 0.82rem;
  text-decoration: none;
  transition: color 0.1s ease;
}

.pbn-links-grid a:hover {
  color: var(--warning-yellow);
  text-decoration: underline;
}

.copyright-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #555A62;
  margin-top: 1rem;
}

/* RESPONSIVE DESIGN BREAKPOINTS */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--bg-block);
    border-bottom: var(--border-thick);
    flex-direction: column;
    padding: 1.5rem;
  }
  
  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }

  .pricing-card.featured::before {
    font-size: 0.65rem;
  }
}