```css
/* ==========================================================
   BingMan Comics — Pure Manga World
   Unique Visual System: "Candy Brutalism" 
   Bright, playful, layered with neo-brutalist shadows
   ========================================================== */

/* 基础重置 */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: #FFF9F0;
  color: #2D2D2D;
  line-height: 1.6;
}

/* 核心布局 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; position: relative; }
.section:nth-child(even) { background: #F3F7F7; }

/* 导航 — 固定顶部 */
.site-header { 
  position: fixed; 
  top: 0; 
  left: 0; 
  width: 100%; 
  z-index: 1000; 
  background: rgba(255, 249, 240, 0.92); 
  backdrop-filter: blur(12px); 
  border-bottom: 3px solid #2D2D2D;
  box-shadow: 0 4px 0 #FFC94B;
}

.header-inner { 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  height: 72px; 
  max-width: 1200px; 
  margin: 0 auto; 
  padding: 0 24px; 
}

.logo { 
  display: flex; 
  align-items: center; 
  gap: 10px; 
  font-weight: 900; 
  font-size: 1.4rem; 
  text-decoration: none; 
  color: #2D2D2D;
  letter-spacing: -1px;
  text-transform: uppercase;
}

.logo-icon { 
  width: 40px; 
  height: 40px; 
  border-radius: 50%; 
  background: #FF6B5B;
  border: 2px solid #2D2D2D;
  box-shadow: 3px 3px 0 #2D2D2D;
  display: flex; 
  align-items: center; 
  justify-content: center; 
  font-size: 1.1rem;
  color: #FFF9F0;
}

.main-nav { 
  display: flex; 
  align-items: center; 
  gap: 28px; 
  list-style: none; 
}

.main-nav a { 
  text-decoration: none; 
  font-size: 0.9rem; 
  font-weight: 700; 
  color: #2D2D2D;
  position: relative;
  padding: 4px 2px;
  transition: color 0.2s, background 0.2s;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 4px;
  background: #2EC4B6;
  border-radius: 2px;
  transition: width 0.25s cubic-bezier(0.25, 1, 0.5, 1);
}

.main-nav a:hover {
  color: #FF6B5B;
}
.main-nav a:hover::after {
  width: 100%;
}

.nav-cta { 
  padding: 10px 24px; 
  border-radius: 50px; 
  color: #FFF9F0 !important; 
  background: #2EC4B6;
  border: 2px solid #2D2D2D;
  box-shadow: 3px 3px 0 #2D2D2D;
  font-weight: 800 !important;
}

.nav-cta::after { display: none !important; }
.nav-cta:hover {
  background: #FF6B5B;
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 #2D2D2D;
}

.menu-toggle { 
  display: none; 
  background: none;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: #2D2D2D;
}

/* 首页Hero */
.hero { 
  min-height: 80vh; 
  display: flex; 
  align-items: center; 
  position: relative;
  overflow: hidden;
  padding-top: 72px;
  background: 
    radial-gradient(circle at 85% 30%, rgba(255, 201, 75, 0.4) 0%, transparent 35%),
    radial-gradient(circle at 15% 80%, rgba(46, 196, 182, 0.25) 0%, transparent 30%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3E%3Cpath d='M0 15 L15 0 L30 15 L15 30 Z' fill='none' stroke='%23FF6B5B' stroke-opacity='0.12' fill-opacity='0'/%3E%3C/svg%3E");
}

.hero::before {
  content: '漫画';
  position: absolute;
  right: 4%;
  bottom: 8%;
  font-size: 14rem;
  font-weight: 900;
  color: #FF6B5B;
  opacity: 0.1;
  letter-spacing: -12px;
  line-height: 1;
  pointer-events: none;
  transform: rotate(4deg);
}

.hero-content { 
  max-width: 720px; 
  position: relative;
  z-index: 2;
}

.hero-eyebrow { 
  display: inline-block; 
  font-size: 0.85rem; 
  font-weight: 800; 
  letter-spacing: 1px;
  padding: 8px 18px; 
  border-radius: 50px; 
  background: #FFC94B;
  border: 2px solid #2D2D2D;
  box-shadow: 3px 3px 0 #2D2D2D;
  margin-bottom: 24px; 
  text-transform: uppercase;
}

.hero h1 { 
  font-size: 3.6rem; 
  line-height: 1.05; 
  margin-bottom: 24px; 
  font-weight: 900;
  letter-spacing: -3px;
  text-transform: uppercase;
}

.hero p { 
  font-size: 1.15rem;
  font-weight: 400;
  opacity: 0.75; 
  max-width: 560px; 
  margin-bottom: 40px; 
}

.hero-buttons { display: flex; gap: 16px; }

.hero-image { 
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 340px;
  height: 380px;
  background: #2EC4B6;
  border: 3px solid #2D2D2D;
  border-radius: 30px 30px 30px 8px;
  box-shadow: 12px 12px 0 #FF6B5B;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  z-index: 1;
  rotate: 2deg;
}

.hero-image::before {
  content: '📖';
  font-size: 6rem;
  filter: drop-shadow(4px 4px 0 rgba(45,45,45,0.3));
}

.hero-image::after {
  content: 'FREE';
  position: absolute;
  bottom: 20px;
  right: -34px;
  background: #FFC94B;
  color: #2D2D2D;
  font-weight: 900;
  font-size: 1rem;
  padding: 8px 40px;
  transform: rotate(-8deg);
  border: 2px solid #2D2D2D;
  box-shadow: 2px 2px 0 #2D2D2D;
}

/* 按钮 */
.btn { 
  display: inline-flex; 
  align-items: center; 
  gap: 10px; 
  padding: 14px 32px; 
  border-radius: 50px; 
  font-weight: 800; 
  cursor: pointer; 
  border: 2px solid #2D2D2D; 
  text-decoration: none; 
  transition: all 0.2s cubic-bezier(0.25, 1, 0.5, 1); 
  font-size: 1rem;
}

.btn-primary { 
  color: #FFF9F0; 
  background: #FF6B5B;
  box-shadow: 4px 4px 0 #2D2D2D;
}

.btn-primary:hover {
  background: #2D2D2D;
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 #2D2D2D;
}

.btn-outline { 
  background: transparent; 
  border: 2px solid #2D2D2D;
  color: #2D2D2D;
  box-shadow: 4px 4px 0 #2D2D2D;
}

.btn-outline:hover {
  background: #2EC4B6;
  color: #FFF9F0;
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 #2D2D2D;
}

/* 标签/标题 */
.section-label { 
  display: inline-block; 
  font-size: 0.8rem; 
  font-weight: 800; 
  letter-spacing: 3px; 
  text-transform: uppercase;
  margin-bottom: 16px; 
  padding: 6px 14px;
  background: #2EC4B6;
  color: #FFF9F0;
  border-radius: 4px;
  box-shadow: 2px 2px 0 #2D2D2D;
}

.section-title { 
  font-size: 2.6rem; 
  margin-bottom: 16px; 
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 1.1;
  text-transform: uppercase;
}

.section-desc { 
  max-width: 640px; 
  opacity: 0.7; 
  margin-bottom: 48px; 
  font-size: 1.1rem;
}

/* 卡片网格 */
.cards-grid { 
  display: grid; 
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); 
  gap: 32px; 
}

.category-card { 
  background: #FFF9F0;
  border-radius: 20px 4px 20px 4px; 
  padding: 32px 28px; 
  border: 3px solid #2D2D2D; 
  box-shadow: 6px 6px 0 #2D2D2D;
  transition: all 0.2s cubic-bezier(0.25, 1, 0.5, 1); 
  position: relative;
}

.category-card:hover { 
  transform: translate(-3px, -3px); 
  box-shadow: 10px 10px 0 #FF6B5B;
  background: #FFFFFF;
}

.category-card::after {
  content: '';
  position: absolute;
  top: 12px;
  right: 12px;
  width: 12px;
  height: 12px;
  background: #FFC94B;
  border: 2px solid #2D2D2D;
  border-radius: 50%;
}

.category-card:nth-child(odd) { background: #FFF3E0; }
.category-card:nth-child(even) { background: #E8F6F6; }
.category-card:nth-child(3n) { background: #FFEBEE; }

.card-icon { 
  width: 56px; 
  height: 56px; 
  border-radius: 16px 4px 16px 4px; 
  background: #FFF9F0;
  border: 2px solid #2D2D2D;
  box-shadow: 3px 3px 0 #2D2D2D;
  display: flex; 
  align-items: center; 
  justify-content: center; 
  margin-bottom: 20px; 
  font-size: 1.6rem; 
}

.category-card h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -1px;
}

.category-card p {
  font-size: 0.9rem;
  opacity: 0.7;
  margin-bottom: 20px;
}

.card-link { 
  font-weight: 800; 
  font-size: 0.9rem; 
  text-decoration: none; 
  color: #2EC4B6;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.card-link::after {
  content: '→';
  font-size: 1.2rem;
  transition: transform 0.2s;
}

.card-link:hover::after { transform: translateX(4px); }

/* 特性块 */
.feature-block { 
  display: grid; 
  grid-template-columns: 1fr 1fr; 
  gap: 72px; 
  align-items: center; 
}

.feature-image { 
  border-radius: 24px 4px 24px 4px; 
  overflow: hidden; 
  border: 3px solid #2D2D2D;
  box-shadow: 10px 10px 0 #FFC94B;
  background: linear-gradient(135deg, #FF6B5B, #FFC94B);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
}

.feature-image::after {
  content: '✨';
  font-size: 5rem;
}

.feature-text { 
  position: relative;
}

.feature-text h3 {
  font-size: 1.8rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.feature-text p {
  font-size: 1rem;
  opacity: 0.8;
  margin-bottom: 24px;
}

.feature-list { 
  list-style: none; 
}

.feature-list li { 
  padding: 10px 0; 
  display: flex; 
  align-items: center; 
  gap: 12px; 
  font-weight: 600;
}

.feature-list li::before { 
  content: '✓'; 
  width: 28px;
  height: 28px;
  background: #2EC4B6;
  color: #FFF9F0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  border: 2px solid #2D2D2D;
  box-shadow: 2px 2px 0 #2D2D2D;
}

/* 数据条 */
.stats-bar { 
  display: grid; 
  grid-template-columns: repeat(4, 1fr); 
  gap: 32px; 
  text-align: center; 
}

.stat-item { 
  padding: 36px 20px; 
  border-radius: 24px 4px 24px 4px; 
  border: 3px solid #2D2D2D;
  background: #FFF9F0;
  box-shadow: 6px 6px 0 #2D2D2D;
  position: relative;
  transition: all 0.2s;
}

.stat-item:hover {
  transform: rotate(-1deg) scale(1.02);
  box-shadow: 8px 8px 0 #FF6B5B;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 4px;
  background: #FF6B5B;
  border-radius: 4px;
}

.stat-number { 
  font-size: 2.8rem; 
  font-weight: 900; 
  letter-spacing: -3px;
  color: #FF6B5B;
}

.stat-label { 
  font-size: 0.9rem; 
  font-weight: 700;
  opacity: 0.7; 
  margin-top: 8px; 
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* 内容墙 */
.content-wall { 
  display: grid; 
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); 
  gap: 32px; 
}

.content-wall-item { 
  background: #FFF9F0;
  border-radius: 16px 4px 16px 4px; 
  overflow: hidden; 
  border: 3px solid #2D2D2D;
  box-shadow: 5px 5px 0 #2D2D2D;
  transition: all 0.2s cubic-bezier(0.25, 1, 0.5, 1); 
}

.content-wall-item:hover { 
  transform: translate(-3px, -3px) rotate(-0.5deg); 
  box-shadow: 10px 10px 0 #2EC4B6; 
}

.content-wall-item:has(img) {
  background: linear-gradient(45deg, #FF6B5B, #FFC94B);
}

.content-wall-item img { 
  width: 100%; 
  height: 200px; 
  object-fit: cover; 
  border-bottom: 3px solid #2D2D2D;
  background: linear-gradient(135deg, #2EC4B6, #FFC94B);
}

.content-wall-body { 
  padding: 22px 20px; 
}

.content-wall-body h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.content-wall-body p {
  font-size: 0.9rem;
  opacity: 0.7;
  line-height: 1.5;
}

/* FAQ */
.faq-list { 
  max-width: 800px; 
  margin: 0 auto; 
}

.faq-item { 
  border: 3px solid #2D2D2D; 
  border-radius: 16px 4px 16px 4px; 
  margin-bottom: 16px; 
  overflow: hidden; 
  cursor: pointer; 
  background: #FFF9F0;
  box-shadow: 4px 4px 0 #2D2D2D;
  transition: box-shadow 0.2s;
}

.faq-item:hover {
  box-shadow: 6px 6px 0 #FFC94B;
}

.faq-item.open {
  background: #FFFFFF;
}

.faq-item .faq-question { 
  padding: 20px 24px; 
  font-weight: 800; 
  display: flex; 
  justify-content: space-between; 
  align-items: center;
  font-size: 1rem;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.6rem;
  color: #FF6B5B;
  transition: transform 0.2s;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-item .faq-answer { 
  padding: 0 24px 20px; 
  display: none; 
  opacity: 0.75; 
  line-height: 1.6;
  font-size: 0.95rem;
}

.faq-item.open .faq-answer { 
  display: block; 
  animation: fadeSlide 0.3s ease;
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 0.75; transform: translateY(0); }
}

/* CTA横幅 */
.cta-banner { 
  padding: 56px 24px; 
  text-align: center; 
  border-radius: 40px 8px 40px 8px; 
  background: #FF6B5B;
  border: 3px solid #2D2D2D;
  box-shadow: 10px 10px 0 #2EC4B6;
  position: relative;
  overflow: hidden;
  margin: 0 24px;
}

.cta-banner::before {
  content: 'コミック';
  position: absolute;
  top: 10%;
  left: 5%;
  font-size: 6rem;
  font-weight: 900;
  opacity: 0.1;
  transform: rotate(-8deg);
  letter-spacing: -5px;
}

.cta-banner h2 { 
  font-size: 2.4rem;
  margin-bottom: 16px;
  letter-spacing: -1px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary { 
  background: #FFF9F0; 
  color: #FF6B5B;
  border-color: #2D2D2D;
  box-shadow: 4px 4px 0 #2D2D2D;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  background: #2D2D2D;
  color: #FFF9F0;
}

/* 页脚 */
.site-footer { 
  padding: 72px 0 32px; 
  background: #2D2D2D;
  color: #FFF9F0;
  border-top: 8px solid #FFC94B;
}

.site-footer .container { 
  padding: 0 24px;
}

.footer-grid { 
  display: grid; 
  grid-template-columns: 2fr 1fr 1fr 1fr; 
  gap: 48px; 
}

.footer-brand h3 {
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: -1px;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.7;
  margin-bottom: 24px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
  color: #FFC94B;
}

.footer-col a {
  display: block;
  padding: 6px 0;
  color: rgba(255, 249, 240, 0.8);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s, padding-left 0.2s;
}

.footer-col a:hover {
  color: #2EC4B6;
  padding-left: 6px;
}

.footer-bottom { 
  border-top: 1px solid rgba(255, 249, 240, 0.15); 
  margin-top: 48px; 
  padding-top: 24px; 
  text-align: center; 
  font-size: 0.85rem; 
  opacity: 0.6;
}

/* 工具类 */
.text-accent { color: #FF6B5B; }
.text-center { text-align: center; }
.seo-description { max-width: 600px; margin: 0 auto 48px; opacity: 0.75; font-size: 1rem; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* 选中样式 */
::selection { background: #FFC94B; color: #2D2D2D; }

/* 滚动条 */
::-webkit-scrollbar { width: 12px; }
::-webkit-scrollbar-track { background: #FFF9F0; }
::-webkit-scrollbar-thumb { background: #2D2D2D; border-radius: 20px; border: 3px solid #FFF9F0; }
::-webkit-scrollbar-thumb:hover { background: #FF6B5B; }

/* ==========================================================
   响应式
   ========================================================== */
@media (max-width: 1024px) {
  .hero-image { display: none; }
  .hero h1 { font-size: 3rem; }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .feature-block { grid-template-columns: 1fr; gap: 40px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .main-nav { 
    display: none; 
    flex-direction: column; 
    position: absolute; 
    top: 72px; 
    left: 0; 
    width: 100%; 
    background: #FFF9F0; 
    padding: 24px; 
    border-bottom: 3px solid #2D2D2D;
    gap: 12px;
  }
  .main-nav.open { 
    display: flex; 
    animation: navIn 0.3s ease;
  }
  @keyframes navIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .menu-toggle { display: flex; }
  .main-nav li { width: 100%; }
  .main-nav a { display: block; padding: 12px 0; }
  .nav-cta { 
    display: inline-block; 
    text-align: center;
  }
  .hero { min-height: 60vh; }
  .hero h1 { font-size: 2.4rem; letter-spacing: -2px; }
  .hero p { font-size: 1rem; }
  .section-title { font-size: 2.1rem; }
  .cta-banner { margin: 0; border-radius: 20px 4px 20px 4px; }
  .cta-banner h2 { font-size: 1.8rem; }
  .faq-item .faq-question { font-size: 0.95rem; }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { width: 100%; justify-content: center; }
  .hero { padding-top: 56px; min-height: 50vh; }
  .hero h1 { font-size: 2rem; }
  .section { padding: 48px 0; }
  .stat-number { font-size: 2.4rem; }
  .feature-image { min-height: 180px; }
}