/* 吃瓜社区 - 清新活力风格 */
/* 主色调：珊瑚橙 + 薄荷绿 + 米白 */

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
body { 
  font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif; 
  overflow-x:hidden; 
  background: #faf8f5;
  color: #2c3e50;
}

/* 核心布局 */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:80px 0; }
.section:nth-child(even) { background: #f0f7f4; }

/* 导航 */
.site-header { 
  position:fixed; top:0; left:0; width:100%; z-index:1000; 
  background: rgba(255,248,240,0.95); 
  backdrop-filter:blur(10px); 
  border-bottom: 2px solid #ffd6b3;
}
.header-inner { 
  display:flex; align-items:center; justify-content:space-between; 
  height:68px; max-width:1200px; margin:0 auto; padding:0 24px;
}
.logo { 
  display:flex; align-items:center; gap:10px; 
  font-weight:800; font-size:1.3rem; text-decoration:none; 
  color: #ff6b4a;
}
.logo-icon { 
  width:40px; height:40px; border-radius:50%; 
  display:flex; align-items:center; justify-content:center; 
  background: linear-gradient(135deg, #ff6b4a, #ffb347);
  color: #fff; font-size:1.2rem; 
  box-shadow: 0 4px 12px rgba(255,107,74,0.3);
}
.main-nav { display:flex; align-items:center; gap:28px; list-style:none; }
.main-nav a { 
  text-decoration:none; font-size:0.9rem; font-weight:600; 
  color: #555; transition:0.3s; 
  position: relative;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: #ff6b4a;
  transition: width 0.3s;
}
.main-nav a:hover { color: #ff6b4a; }
.main-nav a:hover::after { width: 100%; }
.nav-cta { 
  padding:10px 24px; border-radius:50px; 
  background: linear-gradient(135deg, #ff6b4a, #ffb347);
  color:#fff!important; font-weight:700; 
  box-shadow: 0 4px 15px rgba(255,107,74,0.4);
  transition: transform 0.3s;
}
.nav-cta:hover { transform: translateY(-2px); }
.nav-cta::after { display: none; }
.menu-toggle { display:none; font-size:1.5rem; cursor:pointer; color: #ff6b4a; }

/* Hero */
.hero { 
  min-height:75vh; display:flex; align-items:center; 
  background: linear-gradient(135deg, #fff8f0 0%, #f0f7f4 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,107,74,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content { max-width:720px; position: relative; z-index: 1; }
.hero-eyebrow { 
  display:inline-block; font-size:0.8rem; font-weight:700; 
  padding:6px 18px; border-radius:50px; margin-bottom:18px;
  background: #ff6b4a; color: #fff;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.hero h1 { 
  font-size:3rem; line-height:1.15; margin-bottom:20px; 
  color: #1a2e3c;
}
.hero h1 span { 
  background: linear-gradient(135deg, #ff6b4a, #ffb347);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p { 
  font-size:1.15rem; opacity:0.7; max-width:560px; margin-bottom:36px; 
  color: #5a6b7a;
}
.hero-buttons { display:flex; gap:16px; }
.hero-image { 
  border-radius:20px; overflow:hidden; 
  box-shadow: 0 20px 60px rgba(255,107,74,0.15);
  transform: perspective(800px) rotateY(-5deg);
  transition: transform 0.5s;
}
.hero-image:hover { transform: perspective(800px) rotateY(0deg); }
.hero-image img { width:100%; height:auto; display: block; }

/* 按钮 */
.btn { 
  display:inline-flex; align-items:center; gap:10px; 
  padding:14px 32px; border-radius:50px; font-weight:700; 
  cursor:pointer; border:none; text-decoration:none; 
  transition:0.3s; font-size:0.95rem;
}
.btn-primary { 
  background: linear-gradient(135deg, #ff6b4a, #ffb347);
  color:#fff; 
  box-shadow: 0 4px 20px rgba(255,107,74,0.4);
}
.btn-primary:hover { 
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(255,107,74,0.5);
}
.btn-outline { 
  background:transparent; border:2px solid #ff6b4a; 
  color: #ff6b4a;
}
.btn-outline:hover { 
  background: #ff6b4a;
  color: #fff;
}

/* 标签/标题 */
.section-label { 
  display:inline-block; font-size:0.75rem; font-weight:800; 
  letter-spacing:3px; margin-bottom:14px;
  color: #ff6b4a;
  text-transform: uppercase;
}
.section-title { 
  font-size:2.2rem; margin-bottom:16px; 
  color: #1a2e3c;
}
.section-desc { 
  max-width:600px; opacity:0.7; margin-bottom:44px; 
  color: #5a6b7a;
  font-size: 1.05rem;
}

/* 卡片网格 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:28px; }
.category-card { 
  border-radius:20px; padding:32px; 
  border: 1px solid rgba(255,107,74,0.1);
  background: #fff;
  transition:0.3s; 
  position: relative;
  overflow: hidden;
}
.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #ff6b4a, #ffb347);
  opacity: 0;
  transition: opacity 0.3s;
}
.category-card:hover { 
  transform:translateY(-5px); 
  box-shadow:0 12px 40px rgba(255,107,74,0.15);
}
.category-card:hover::before { opacity: 1; }
.card-icon { 
  width:56px; height:56px; border-radius:16px; 
  display:flex; align-items:center; justify-content:center; 
  margin-bottom:18px; font-size:1.5rem;
  background: linear-gradient(135deg, #fff0e6, #fff8f0);
  color: #ff6b4a;
}
.card-link { 
  font-weight:700; font-size:0.85rem; text-decoration:none; 
  color: #ff6b4a;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 特性块 */
.feature-block { display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; }
.feature-image { 
  border-radius:20px; overflow:hidden; 
  box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}
.feature-image img { width:100%; height:auto; display: block; }
.feature-text { }
.feature-list { list-style:none; }
.feature-list li { 
  padding:8px 0; display:flex; align-items:center; gap:12px; 
  font-size: 1.05rem;
}
.feature-list li::before { 
  content:'✓'; font-weight:800; 
  color: #4caf50;
  font-size: 1.2rem;
}

/* 数据条 */
.stats-bar { 
  display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center; 
  background: linear-gradient(135deg, #ff6b4a, #ffb347);
  padding: 40px;
  border-radius: 20px;
  color: #fff;
}
.stat-item { 
  padding:20px; border-radius:16px; 
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(10px);
}
.stat-number { 
  font-size:2.4rem; font-weight:900; 
  color: #fff;
}
.stat-label { font-size:0.9rem; opacity:0.85; margin-top:6px; }

/* 内容墙 */
.content-wall { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:28px; }
.content-wall-item { 
  border-radius:20px; overflow:hidden; 
  border: 1px solid rgba(255,107,74,0.1);
  background: #fff;
  transition:0.3s; 
}
.content-wall-item:hover { 
  transform:translateY(-5px); 
  box-shadow:0 12px 40px rgba(255,107,74,0.12);
}
.content-wall-item img { 
  width:100%; height:220px; object-fit:cover; 
  transition: transform 0.5s;
}
.content-wall-item:hover img { transform: scale(1.05); }
.content-wall-body { padding:24px; }
.content-wall-body h3 { margin-bottom: 8px; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { 
  border: 1px solid rgba(255,107,74,0.15);
  border-radius:16px; margin-bottom:10px; 
  overflow:hidden; cursor:pointer; 
  background: #fff;
  transition: 0.3s;
}
.faq-item:hover { border-color: #ff6b4a; }
.faq-item .faq-question { 
  padding:18px 24px; font-weight:700; 
  display:flex; justify-content:space-between; 
  font-size: 1.05rem;
  color: #1a2e3c;
}
.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  color: #ff6b4a;
  transition: transform 0.3s;
}
.faq-item.open .faq-question::after {
  content: '-';
  transform: rotate(180deg);
}
.faq-item .faq-answer { 
  padding:0 24px 20px; display:none; 
  opacity:0.8; line-height: 1.6;
  color: #5a6b7a;
}
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { 
  padding:64px 24px; text-align:center; 
  border-radius:20px; 
  background: linear-gradient(135deg, #ff6b4a, #ffb347);
  color:#fff; 
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  pointer-events: none;
}
.cta-banner h2 { color:#fff; font-size: 2rem; }
.cta-banner .btn-primary { 
  background:#fff; 
  color: #ff6b4a;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}
.cta-banner .btn-primary:hover { 
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

/* 页脚 */
.site-footer { 
  padding:60px 0 30px; 
  background: #1a2e3c;
  color: #b8c5d0;
}
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; }
.footer-brand { }
.footer-brand .logo { color: #ff6b4a; }
.footer-col { }
.footer-col h4 { 
  color: #fff; 
  margin-bottom: 16px;
  font-size: 1rem;
}
.footer-col a { 
  display: block;
  color: #b8c5d0;
  text-decoration: none;
  padding: 4px 0;
  transition: color 0.3s;
}
.footer-col a:hover { color: #ff6b4a; }
.footer-bottom { 
  border-top: 1px solid rgba(255,255,255,0.08); 
  margin-top:40px; padding-top:24px; 
  text-align:center; font-size:0.85rem; 
  color: #8a9ba8;
}

/* 工具类 */
.text-accent { color: #ff6b4a; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.7; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* 响应式 */
@media (max-width: 768px) {
  .feature-block { grid-template-columns:1fr; gap: 40px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); padding: 30px; }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .main-nav { display:none; }
  .menu-toggle { display:flex; }
  .main-nav.open { 
    display:flex; flex-direction:column; 
    position:absolute; top:68px; left:0; width:100%; 
    background:#fff; padding:24px; 
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    gap: 16px;
  }
  .main-nav.open a { padding: 8px 0; }
  .hero h1 { font-size: 2.2rem; }
  .hero { min-height: 60vh; }
}
@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; }
  .section-title { font-size: 1.6rem; }
  .hero h1 { font-size: 1.8rem; }
}