/* ==========================================================================
   Retro Comic Book Bubble (复古美漫对话框) Theme - Telegram Standard CSS
   ========================================================================== */

:root {
  --comic-yellow: #FFDE59;
  --comic-red: #FF3131;
  --comic-blue: #004AAD;
  --comic-cyan: #00F0FF;
  --comic-bg: #FFF9E6;
  --comic-black: #111111;
  --comic-white: #FFFFFF;
  --comic-muted: #555555;
  --comic-shadow: 4px 4px 0px #111111;
  --comic-shadow-lg: 8px 8px 0px #111111;
  
  --font-comic: "Impact", "Bangers", "Arial Black", -apple-system, sans-serif;
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--comic-bg);
  color: var(--comic-black);
  line-height: 1.6;
  /* Retro halftone dot pattern overlay */
  background-image: radial-gradient(var(--comic-yellow) 20%, transparent 20%), radial-gradient(rgba(0,0,0,0.06) 20%, transparent 20%);
  background-size: 20px 20px;
  background-position: 0 0, 10px 10px;
}

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

a:hover {
  color: var(--comic-red);
}

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

/* ==========================================================================
   Header & Navigation (Comic Heavy Outline)
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--comic-yellow);
  border-bottom: 4px solid var(--comic-black);
  box-shadow: 0 4px 0px var(--comic-black);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-comic);
  font-size: 24px;
  font-weight: 900;
  color: var(--comic-black);
  text-transform: uppercase;
  letter-spacing: 1px;
  transform: rotate(-1deg);
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: var(--comic-red);
  color: var(--comic-yellow);
  border: 3px solid var(--comic-black);
  box-shadow: var(--comic-shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  border-radius: 8px;
  transform: rotate(-3deg);
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  color: var(--comic-black);
  font-size: 15px;
  font-weight: 800;
  text-transform: uppercase;
  padding: 6px 12px;
  border: 2px solid transparent;
  border-radius: 6px;
}

.nav-link.active,
.nav-link:hover {
  background: var(--comic-white);
  border: 2px solid var(--comic-black);
  box-shadow: var(--comic-shadow);
  color: var(--comic-red);
}

/* ==========================================================================
   Buttons (Comic Pop Art "BANG!" Style)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  font-size: 15px;
  font-weight: 900;
  text-transform: uppercase;
  border: 3px solid var(--comic-black);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--comic-shadow);
  text-align: center;
}

.btn-primary {
  background-color: var(--comic-red);
  color: var(--comic-white);
}

.btn-primary:hover {
  background-color: var(--comic-yellow);
  color: var(--comic-black);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--comic-black);
}

.btn-outline {
  background-color: var(--comic-white);
  color: var(--comic-black);
}

.btn-outline:hover {
  background-color: var(--comic-cyan);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--comic-black);
}

/* ==========================================================================
   Hero Banner Section (Comic Book Cover Banner)
   ========================================================================== */
.hero {
  padding: 60px 0;
  text-align: center;
  position: relative;
}

.comic-badge {
  display: inline-block;
  font-family: var(--font-comic);
  font-size: 18px;
  font-weight: 900;
  background: var(--comic-red);
  color: var(--comic-yellow);
  border: 3px solid var(--comic-black);
  padding: 6px 20px;
  box-shadow: var(--comic-shadow);
  transform: rotate(-2deg);
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.hero-title {
  font-size: 42px;
  font-weight: 900;
  line-height: 1.25;
  color: var(--comic-black);
  margin-bottom: 18px;
  text-transform: uppercase;
}

.hero-title span {
  background: var(--comic-yellow);
  border: 3px solid var(--comic-black);
  padding: 2px 10px;
  box-shadow: var(--comic-shadow);
  color: var(--comic-red);
  display: inline-block;
  transform: rotate(1deg);
}

.hero-subtitle {
  font-size: 18px;
  font-weight: 600;
  color: #333333;
  max-width: 800px;
  margin: 0 auto 36px auto;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-bottom: 48px;
}

/* Comic Speech Bubble Showcase Grid */
.comic-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 20px;
}

.comic-card {
  background: var(--comic-white);
  border: 4px solid var(--comic-black);
  box-shadow: var(--comic-shadow-lg);
  border-radius: 12px;
  padding: 16px;
  position: relative;
  transition: transform 0.25s ease;
}

.comic-card:hover {
  transform: scale(1.03) rotate(-1deg);
}

.comic-card::after {
  content: 'BANG!';
  position: absolute;
  top: -16px;
  right: 16px;
  font-family: var(--font-comic);
  font-size: 14px;
  background: var(--comic-yellow);
  color: var(--comic-black);
  border: 2px solid var(--comic-black);
  padding: 2px 8px;
  font-weight: 900;
  border-radius: 4px;
  transform: rotate(12deg);
}

.comic-card img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  border: 3px solid var(--comic-black);
  border-radius: 8px;
}

.comic-card-label {
  margin-top: 12px;
  font-size: 16px;
  font-weight: 800;
  color: var(--comic-black);
}

/* ==========================================================================
   Section Components
   ========================================================================== */
.section {
  padding: 60px 0;
  border-top: 4px solid var(--comic-black);
}

.section-panel {
  background: var(--comic-white);
}

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title h2 {
  font-size: 34px;
  font-weight: 900;
  color: var(--comic-black);
  text-transform: uppercase;
  margin-bottom: 10px;
  display: inline-block;
  background: var(--comic-yellow);
  border: 3px solid var(--comic-black);
  padding: 4px 20px;
  box-shadow: var(--comic-shadow);
  transform: rotate(-1deg);
}

.section-title p {
  color: var(--comic-muted);
  font-size: 16px;
  font-weight: 600;
  margin-top: 14px;
}

/* 3x3 Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.feature-card {
  background: var(--comic-bg);
  border: 3px solid var(--comic-black);
  box-shadow: var(--comic-shadow);
  padding: 28px 22px;
  border-radius: 10px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 7px 7px 0px var(--comic-black);
  background: var(--comic-yellow);
}

.feature-icon {
  width: 46px;
  height: 46px;
  border: 3px solid var(--comic-black);
  background: var(--comic-red);
  color: var(--comic-white);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  margin-bottom: 16px;
  box-shadow: 3px 3px 0px var(--comic-black);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--comic-black);
}

.feature-card p {
  font-size: 14px;
  color: #444444;
  line-height: 1.6;
  font-weight: 500;
}

/* Blog / Tutorial Grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.blog-card {
  background: var(--comic-white);
  border: 3px solid var(--comic-black);
  box-shadow: var(--comic-shadow);
  border-radius: 10px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.blog-card:hover {
  box-shadow: 7px 7px 0px var(--comic-black);
  transform: translate(-2px, -2px);
}

.blog-date {
  font-family: var(--font-comic);
  font-size: 14px;
  background: var(--comic-cyan);
  color: var(--comic-black);
  border: 2px solid var(--comic-black);
  padding: 2px 10px;
  display: inline-block;
  margin-bottom: 12px;
  font-weight: 900;
  border-radius: 4px;
}

.blog-card h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--comic-black);
  margin-bottom: 12px;
  line-height: 1.4;
}

.blog-card p {
  font-size: 14px;
  color: #444444;
  margin-bottom: 18px;
}

.blog-link {
  font-weight: 800;
  font-size: 14px;
  color: var(--comic-blue);
}

.more-wrapper {
  text-align: center;
  margin-top: 40px;
}

/* FAQ Section (Speech Bubbles) */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.faq-item {
  background: var(--comic-white);
  border: 3px solid var(--comic-black);
  box-shadow: var(--comic-shadow);
  border-radius: 12px;
  padding: 24px;
  position: relative;
}

.faq-question {
  font-size: 18px;
  font-weight: 900;
  color: var(--comic-black);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-question::before {
  content: 'Q!';
  background: var(--comic-red);
  color: var(--comic-yellow);
  border: 2px solid var(--comic-black);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
}

.faq-answer {
  font-size: 15px;
  color: #333333;
  line-height: 1.7;
  padding-left: 38px;
  font-weight: 500;
}

/* Download Grid */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.download-card {
  background: var(--comic-white);
  border: 3px solid var(--comic-black);
  box-shadow: var(--comic-shadow-lg);
  border-radius: 12px;
  padding: 32px 22px;
  text-align: center;
}

.download-card-icon {
  font-size: 40px;
  margin-bottom: 14px;
}

.download-card h3 {
  font-size: 22px;
  font-weight: 900;
  color: var(--comic-black);
  margin-bottom: 12px;
}

.download-card p {
  font-size: 14px;
  color: #555555;
  margin-bottom: 24px;
  line-height: 1.6;
}

.download-web-banner {
  margin-top: 36px;
  background: var(--comic-yellow);
  border: 4px solid var(--comic-black);
  box-shadow: var(--comic-shadow-lg);
  border-radius: 12px;
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.download-web-banner h3 {
  font-size: 22px;
  font-weight: 900;
  color: var(--comic-black);
  margin-bottom: 8px;
}

.download-web-banner p {
  color: #333333;
  font-size: 15px;
  font-weight: 600;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background-color: var(--comic-black);
  color: var(--comic-white);
  border-top: 5px solid var(--comic-red);
  padding: 60px 0 30px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 18px;
  font-weight: 900;
  color: var(--comic-yellow);
  margin-bottom: 18px;
  text-transform: uppercase;
}

.footer-col p {
  font-size: 14px;
  color: #dddddd;
  line-height: 1.7;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: #cccccc;
  font-size: 14px;
}

.footer-col a:hover {
  color: var(--comic-yellow);
}

.footer-copyright {
  border-top: 2px solid #333333;
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: #999999;
  font-weight: 700;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .features-grid,
  .download-grid,
  .comic-showcase {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    height: auto;
    padding: 14px 0;
    gap: 12px;
  }
  
  .nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }
  
  .hero-title {
    font-size: 30px;
  }
  
  .features-grid,
  .blog-grid,
  .download-grid,
  .comic-showcase {
    grid-template-columns: 1fr;
  }
  
  .download-web-banner {
    flex-direction: column;
    text-align: center;
    gap: 20px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
}