/* ==========================================================================
   QuickQ VPN - Retro Cyber Terminal Stylesheet
   Pure Native CSS | Phosphor Green (#33FF66) & Black CRT Theme
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;600;700;800&display=swap');

:root {
  --term-bg: #050805;
  --term-panel: #0a110a;
  --term-panel-border: #1a381d;
  --term-green: #33ff66;
  --term-green-bright: #5cff85;
  --term-green-dim: #1f993d;
  --term-green-glow: rgba(51, 255, 102, 0.35);
  --term-green-glow-strong: rgba(51, 255, 102, 0.7);
  --term-dark-green: #0d2112;
  --term-amber: #ffb833;
  --term-red: #ff3355;
  --term-cyan: #33e6ff;
  --term-font: 'JetBrains Mono', 'SF Mono', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--term-bg);
  color: var(--term-green);
  font-family: var(--term-font);
}

body {
  min-height: 100vh;
  background-color: var(--term-bg);
  color: var(--term-green);
  font-family: var(--term-font);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  text-shadow: 0 0 4px var(--term-green-glow);
}

/* CRT Screen Scanline & Vignette Overlay */
.crt-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
  background: 
    linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.35) 50%),
    linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
  background-size: 100% 3px, 6px 100%;
  animation: crtFlicker 0.12s infinite;
  opacity: 0.85;
}

.crt-vignette {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9998;
  box-shadow: inset 0 0 100px rgba(0, 0, 0, 0.9);
}

@keyframes crtFlicker {
  0% { opacity: 0.92; }
  50% { opacity: 0.88; }
  100% { opacity: 0.94; }
}

/* Blinking Cursor */
.cursor {
  display: inline-block;
  width: 9px;
  height: 1.15em;
  background-color: var(--term-green);
  vertical-align: -0.15em;
  margin-left: 3px;
  animation: cursorBlink 1s infinite steps(1, start);
  box-shadow: 0 0 8px var(--term-green-bright);
}

@keyframes cursorBlink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* Layout Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Terminal Window Frame */
.term-window {
  background: var(--term-panel);
  border: 1px solid var(--term-panel-border);
  box-shadow: 0 0 25px rgba(0, 255, 65, 0.08);
  border-radius: 4px;
  overflow: hidden;
  margin: 25px 0;
}

.term-header {
  background: #0d1a0e;
  padding: 8px 14px;
  border-bottom: 1px solid var(--term-panel-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.term-dots {
  display: flex;
  gap: 8px;
}

.term-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

.term-dot.red { background: #ff5f56; }
.term-dot.yellow { background: #ffbd2e; }
.term-dot.green { background: #27c93f; }

.term-title {
  color: var(--term-green-bright);
  font-weight: 600;
}

.term-status {
  color: var(--term-green-dim);
  font-size: 0.8rem;
}

.term-body {
  padding: 24px;
}

/* Top Navigation Bar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5, 8, 5, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--term-panel-border);
  padding: 14px 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}

.brand-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--term-green-bright);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  text-shadow: 0 0 10px var(--term-green-glow);
}

.brand-logo .brand-tag {
  font-size: 0.7rem;
  background: var(--term-dark-green);
  border: 1px solid var(--term-green-dim);
  padding: 2px 6px;
  border-radius: 2px;
  color: var(--term-green);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--term-green);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  position: relative;
  padding: 4px 6px;
}

.nav-links a:hover {
  color: #fff;
  text-shadow: 0 0 8px var(--term-green-bright);
}

.nav-links a.nav-news {
  background: rgba(51, 255, 102, 0.12);
  border: 1px solid var(--term-green-dim);
  color: var(--term-green-bright);
  padding: 4px 10px;
  border-radius: 2px;
}

.nav-links a.nav-news:hover {
  background: var(--term-green);
  color: #000;
  text-shadow: none;
}

/* ASCII Art Display */
.ascii-banner {
  font-family: var(--term-font);
  white-space: pre;
  font-size: 0.65rem;
  line-height: 1.15;
  color: var(--term-green-bright);
  text-shadow: 0 0 8px var(--term-green-glow);
  overflow-x: auto;
  margin-bottom: 20px;
}

@media (min-width: 768px) {
  .ascii-banner {
    font-size: 0.85rem;
  }
}

/* Hero Section */
.hero {
  padding: 40px 0 30px;
}

.boot-sequence {
  background: #020402;
  border: 1px dashed var(--term-panel-border);
  padding: 16px;
  margin-bottom: 25px;
  font-size: 0.85rem;
  border-radius: 3px;
}

.boot-line {
  margin: 4px 0;
  display: flex;
  gap: 10px;
  word-break: break-all;
}

.boot-tag {
  color: var(--term-green-bright);
  font-weight: 700;
}

.boot-tag.info { color: var(--term-cyan); }
.boot-tag.warn { color: var(--term-amber); }

.hero-headline-group {
  margin-bottom: 25px;
}

.hero-title {
  font-size: 2.3rem;
  line-height: 1.25;
  color: #ffffff;
  text-shadow: 0 0 15px var(--term-green-bright);
  margin-bottom: 15px;
  font-weight: 800;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--term-green-bright);
  margin-bottom: 12px;
  font-weight: 600;
}

.hero-desc {
  font-size: 0.95rem;
  color: #c7ecc8;
  max-width: 860px;
  line-height: 1.7;
}

/* CTA Buttons */
.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  font-family: var(--term-font);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.25s ease;
  min-height: 48px;
  letter-spacing: 0.03em;
}

.btn-primary {
  background: var(--term-green);
  color: #000;
  border: 2px solid var(--term-green);
  box-shadow: 0 0 15px var(--term-green-glow);
}

.btn-primary:hover {
  background: #ffffff;
  border-color: #ffffff;
  box-shadow: 0 0 25px #ffffff;
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--term-green-bright);
  border: 2px solid var(--term-green-dim);
}

.btn-secondary:hover {
  background: rgba(51, 255, 102, 0.15);
  border-color: var(--term-green-bright);
  color: #fff;
  transform: translateY(-2px);
}

.btn-blog {
  background: #09170c;
  color: var(--term-cyan);
  border: 2px solid #1a5640;
}

.btn-blog:hover {
  background: #143525;
  border-color: var(--term-cyan);
  color: #fff;
  box-shadow: 0 0 15px rgba(51, 230, 255, 0.4);
  transform: translateY(-2px);
}

/* Interactive Command Line Box */
.interactive-cli {
  background: #030603;
  border: 1px solid var(--term-panel-border);
  padding: 16px;
  margin: 30px 0;
  border-radius: 3px;
  font-size: 0.9rem;
}

.cli-history {
  margin-bottom: 12px;
  max-height: 220px;
  overflow-y: auto;
  line-height: 1.5;
}

.cli-history p {
  margin-bottom: 6px;
}

.cli-input-line {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cli-prompt {
  color: var(--term-green-bright);
  font-weight: 700;
}

.cli-input {
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-family: var(--term-font);
  font-size: 0.95rem;
  flex: 1;
  text-shadow: 0 0 5px var(--term-green);
}

/* Section Common */
.section {
  padding: 50px 0;
  border-top: 1px dashed var(--term-panel-border);
}

.section-title {
  font-size: 1.7rem;
  color: #ffffff;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title .hash {
  color: var(--term-green-dim);
}

.section-subtitle {
  color: #9fe2a8;
  font-size: 0.95rem;
  margin-bottom: 35px;
}

/* Core Advantages Grid (3 Cards) */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background: var(--term-panel);
  border: 1px solid var(--term-panel-border);
  padding: 24px;
  border-radius: 3px;
  position: relative;
  transition: all 0.3s ease;
}

.feature-card:hover {
  border-color: var(--term-green);
  box-shadow: 0 0 20px rgba(51, 255, 102, 0.15);
  transform: translateY(-3px);
}

.feature-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--term-green-dim);
  border: 1px solid var(--term-panel-border);
  padding: 2px 8px;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.9rem;
  color: #b7e0bb;
  line-height: 1.6;
}

.feature-metrics {
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px dashed var(--term-panel-border);
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--term-green-bright);
}

/* Media & AI Card Section */
.media-ai-card {
  background: var(--term-panel);
  border: 1px solid var(--term-panel-border);
  padding: 30px;
  border-radius: 4px;
}

.media-ai-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 25px;
  margin-top: 20px;
}

@media (min-width: 768px) {
  .media-ai-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.unlock-box {
  background: #040904;
  border: 1px solid #142a18;
  padding: 20px;
  border-radius: 3px;
}

.unlock-box h4 {
  font-size: 1.1rem;
  color: #ffffff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.unlock-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.badge {
  background: var(--term-dark-green);
  border: 1px solid var(--term-green-dim);
  color: #ffffff;
  padding: 4px 10px;
  font-size: 0.8rem;
  border-radius: 2px;
}

/* Pricing Table */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 600px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.pricing-card {
  background: var(--term-panel);
  border: 1px solid var(--term-panel-border);
  padding: 24px 20px;
  border-radius: 3px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card.featured {
  border-color: var(--term-green);
  box-shadow: 0 0 25px rgba(51, 255, 102, 0.2);
  background: #0b1a0e;
}

.pricing-card.featured::before {
  content: "★ 极力推荐 ★";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--term-green);
  color: #000;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 2px 10px;
  border-radius: 2px;
}

.pricing-plan-name {
  font-size: 1.15rem;
  color: #fff;
  margin-bottom: 8px;
  text-align: center;
}

.pricing-price {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--term-green-bright);
  text-align: center;
  margin: 10px 0;
}

.pricing-price span {
  font-size: 0.85rem;
  font-weight: 400;
  color: #9fe2a8;
}

.pricing-save {
  text-align: center;
  font-size: 0.8rem;
  color: var(--term-amber);
  margin-bottom: 20px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 25px;
  flex: 1;
}

.pricing-features li {
  font-size: 0.85rem;
  color: #c7ecc8;
  padding: 6px 0;
  border-bottom: 1px dashed rgba(51, 255, 102, 0.1);
  display: flex;
  align-items: center;
  gap: 6px;
}

.pricing-features li::before {
  content: "✓";
  color: var(--term-green-bright);
  font-weight: bold;
}

.pricing-card .btn {
  width: 100%;
}

/* User Testimonials / Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 768px) {
  .reviews-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.review-card {
  background: var(--term-panel);
  border: 1px solid var(--term-panel-border);
  padding: 20px;
  border-radius: 3px;
}

.review-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-size: 0.85rem;
}

.reviewer-name {
  color: #fff;
  font-weight: 700;
}

.review-stars {
  color: var(--term-amber);
}

.review-text {
  font-size: 0.88rem;
  color: #b7e0bb;
  line-height: 1.6;
  margin-bottom: 12px;
}

.review-meta {
  font-size: 0.78rem;
  color: var(--term-green-dim);
  border-top: 1px dashed var(--term-panel-border);
  padding-top: 8px;
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--term-panel);
  border: 1px solid var(--term-panel-border);
  border-radius: 3px;
  overflow: hidden;
}

.faq-question {
  padding: 16px 20px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: #ffffff;
  user-select: none;
}

.faq-question:hover {
  background: rgba(51, 255, 102, 0.05);
  color: var(--term-green-bright);
}

.faq-answer {
  padding: 0 20px 16px;
  font-size: 0.9rem;
  color: #b7e0bb;
  line-height: 1.6;
  display: block;
}

/* Footer Section */
.footer {
  margin-top: 60px;
  background: #020402;
  border-top: 1px solid var(--term-panel-border);
  padding: 40px 0 30px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 30px;
  margin-bottom: 25px;
}

.footer-link {
  color: var(--term-green-bright);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  padding: 6px 12px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.footer-link:hover {
  border-color: var(--term-green-dim);
  background: var(--term-dark-green);
  color: #ffffff;
  text-shadow: 0 0 8px var(--term-green-bright);
}

.footer-copy {
  text-align: center;
  font-size: 0.8rem;
  color: var(--term-green-dim);
  border-top: 1px dashed #142a18;
  padding-top: 20px;
}

/* Sub-page Article Layout Styles */
.article-container {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
}

.article-card {
  background: var(--term-panel);
  border: 1px solid var(--term-panel-border);
  padding: 28px;
  margin-bottom: 30px;
  border-radius: 3px;
}

.article-card h2 {
  font-size: 1.45rem;
  color: #ffffff;
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-meta {
  font-size: 0.82rem;
  color: var(--term-green-dim);
  margin-bottom: 18px;
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.article-content {
  font-size: 0.93rem;
  color: #c7ecc8;
  line-height: 1.75;
}

.article-content p {
  margin-bottom: 14px;
}

.article-content h3 {
  font-size: 1.15rem;
  color: var(--term-green-bright);
  margin: 20px 0 10px;
}

.article-content ul, .article-content ol {
  margin: 12px 0 16px 24px;
}

.article-content li {
  margin-bottom: 6px;
}

.article-content a {
  color: var(--term-cyan);
  text-decoration: underline;
  font-weight: 600;
}

.article-content a:hover {
  color: #fff;
  text-shadow: 0 0 8px var(--term-cyan);
}

/* Responsive Media Queries */
@media (max-width: 768px) {
  .hero-title {
    font-size: 1.65rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .nav-container {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .nav-links {
    width: 100%;
    justify-content: flex-start;
    gap: 12px;
  }
  
  .cta-group {
    flex-direction: column;
    width: 100%;
  }
  
  .cta-group .btn {
    width: 100%;
    text-align: center;
  }
  
  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
}