/* =============================================
   PA捕鱼 — 独特视觉设计系统
   风格：海洋渐变流体 + 透明玻璃态 + 珊瑚色调
   灵感：深海光影、气泡、水波纹
   ============================================= */

/* 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: linear-gradient(135deg, #f0f7ff 0%, #e8f4f8 30%, #f5f0ff 70%, #fff5f0 100%);
  background-attachment: fixed;
  color: #1a2a3a;
}

/* 核心布局 — 必须居中 */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:80px 0; position: relative; }
.section:nth-child(even) { 
  background: rgba(255,255,255,0.5); 
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255,255,255,0.8);
  border-bottom: 1px solid rgba(255,255,255,0.8);
}

/* 导航 — 固定顶部 */
.site-header { 
  position:fixed; top:0; left:0; width:100%; z-index:1000; 
  background: rgba(240, 247, 255, 0.85); 
  backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid rgba(147, 197, 253, 0.3);
  box-shadow: 0 4px 30px rgba(147, 197, 253, 0.1);
}
.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; 
  background: linear-gradient(135deg, #0891b2, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo-icon { 
  width:40px; height:40px; border-radius:12px; 
  display:flex; align-items:center; justify-content:center; 
  font-size:1.2rem; 
  background: linear-gradient(135deg, #0891b2, #6366f1);
  color: #fff;
  -webkit-text-fill-color: #fff;
  box-shadow: 0 4px 15px rgba(8, 145, 178, 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:500; 
  color: #1a2a3a; transition:0.3s; 
  position: relative;
  padding: 4px 0;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #0891b2, #6366f1);
  transition: width 0.3s ease;
  border-radius: 2px;
}
.main-nav a:hover::after { width: 100%; }
.main-nav a:hover { color: #0891b2; }
.nav-cta { 
  padding:10px 24px; border-radius:50px; 
  background: linear-gradient(135deg, #0891b2, #6366f1);
  color:#fff!important; font-weight:600;
  box-shadow: 0 4px 15px rgba(8, 145, 178, 0.3);
  transition: 0.3s;
}
.nav-cta:hover { 
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(8, 145, 178, 0.4);
}
.nav-cta::after { display: none !important; }
.menu-toggle { display:none; }

/* 首页Hero */
.hero { 
  min-height:80vh; display:flex; align-items:center; 
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(8, 145, 178, 0.08), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.06), transparent 70%);
  border-radius: 50%;
  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 16px; border-radius:50px; margin-bottom:20px;
  background: linear-gradient(135deg, rgba(8, 145, 178, 0.1), rgba(99, 102, 241, 0.1));
  color: #0891b2;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 1px solid rgba(8, 145, 178, 0.2);
}
.hero h1 { 
  font-size:3.2rem; line-height:1.15; margin-bottom:20px;
  font-weight: 800;
  background: linear-gradient(135deg, #1a2a3a 0%, #0891b2 50%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p { 
  font-size:1.15rem; 
  color: #4a5a6a; 
  max-width:560px; margin-bottom:36px; 
  line-height: 1.7;
}
.hero-buttons { display:flex; gap:16px; }
.hero-image { 
  border-radius:20px; overflow:hidden; 
  box-shadow: 0 20px 60px rgba(8, 145, 178, 0.15);
  position: relative;
}
.hero-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8, 145, 178, 0.1), rgba(99, 102, 241, 0.1));
  z-index: 1;
  pointer-events: none;
}
.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:600; 
  cursor:pointer; border:none; text-decoration:none; transition:0.3s;
  font-size: 0.95rem;
  letter-spacing: 0.3px;
}
.btn-primary { 
  background: linear-gradient(135deg, #0891b2, #6366f1);
  color:#fff; 
  box-shadow: 0 4px 20px rgba(8, 145, 178, 0.3);
}
.btn-primary:hover { 
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(8, 145, 178, 0.4);
}
.btn-outline { 
  background:transparent; 
  border:2px solid rgba(8, 145, 178, 0.4);
  color: #0891b2;
}
.btn-outline:hover { 
  background: rgba(8, 145, 178, 0.05);
  border-color: #0891b2;
  transform: translateY(-2px);
}

/* 标签/标题 */
.section-label { 
  display:inline-block; font-size:0.75rem; font-weight:700; 
  letter-spacing:3px; margin-bottom:14px;
  text-transform: uppercase;
  background: linear-gradient(135deg, #0891b2, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-title { 
  font-size:2.2rem; margin-bottom:16px; 
  font-weight: 800;
  color: #1a2a3a;
  line-height: 1.2;
}
.section-desc { 
  max-width:600px; 
  color: #5a6a7a; 
  margin-bottom:44px; 
  font-size: 1.05rem;
  line-height: 1.7;
}

/* 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; 
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.8);
  transition:0.3s; 
  box-shadow: 0 4px 20px rgba(8, 145, 178, 0.06);
}
.category-card:hover { 
  transform:translateY(-5px); 
  box-shadow: 0 12px 40px rgba(8, 145, 178, 0.12);
  background: rgba(255,255,255,0.8);
  border-color: rgba(8, 145, 178, 0.2);
}
.card-icon { 
  width:52px; height:52px; border-radius:14px; 
  display:flex; align-items:center; justify-content:center; 
  margin-bottom:18px; font-size:1.5rem;
  background: linear-gradient(135deg, rgba(8, 145, 178, 0.1), rgba(99, 102, 241, 0.1));
  color: #0891b2;
}
.card-link { 
  font-weight:600; font-size:0.85rem; text-decoration:none; 
  color: #6366f1;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: 0.3s;
}
.card-link:hover { gap: 10px; color: #0891b2; }

/* 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 15px 50px rgba(8, 145, 178, 0.12);
  position: relative;
}
.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8, 145, 178, 0.05), rgba(99, 102, 241, 0.05));
  pointer-events: none;
}
.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:10px; 
  font-size: 1rem;
  color: #2a3a4a;
}
.feature-list li::before { 
  content:'✦'; 
  font-weight:700; 
  color: #0891b2;
  font-size: 1.2rem;
}

/* 数据条 */
.stats-bar { 
  display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center; 
}
.stat-item { 
  padding:28px 20px; border-radius:20px; 
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.7);
  transition: 0.3s;
}
.stat-item:hover {
  background: rgba(255,255,255,0.7);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(8, 145, 178, 0.08);
}
.stat-number { 
  font-size:2.4rem; font-weight:800; 
  background: linear-gradient(135deg, #0891b2, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size:0.9rem; color: #5a6a7a; margin-top:8px; }

/* 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; 
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.7);
  transition:0.3s; 
}
.content-wall-item:hover { 
  transform:translateY(-5px); 
  box-shadow: 0 12px 40px rgba(8, 145, 178, 0.1);
  background: rgba(255,255,255,0.7);
}
.content-wall-item img { 
  width:100%; height:220px; object-fit:cover; 
  display: block;
}
.content-wall-body { padding:24px; }
.content-wall-body h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
  color: #1a2a3a;
}

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { 
  border: 1px solid rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.3);
  backdrop-filter: blur(8px);
  border-radius:16px; margin-bottom:10px; overflow:hidden; cursor:pointer; 
  transition: 0.3s;
}
.faq-item:hover {
  background: rgba(255,255,255,0.5);
}
.faq-item .faq-question { 
  padding:18px 24px; font-weight:600; 
  display:flex; justify-content:space-between; 
  color: #1a2a3a;
  font-size: 1rem;
}
.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: #0891b2;
  transition: 0.3s;
}
.faq-item.open .faq-question::after {
  content: '−';
}
.faq-item .faq-answer { 
  padding:0 24px 20px; display:none; 
  color: #4a5a6a;
  line-height: 1.6;
}
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { 
  padding:60px 40px; text-align:center; border-radius:24px; 
  background: linear-gradient(135deg, #0891b2, #6366f1);
  color:#fff;
  box-shadow: 0 20px 60px rgba(8, 145, 178, 0.25);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.1), transparent 70%);
  border-radius: 50%;
}
.cta-banner h2 { 
  color:#fff; 
  font-size: 2rem;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
.cta-banner p {
  color: rgba(255,255,255,0.85);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}
.cta-banner .btn-primary { 
  background:#fff; 
  color: #0891b2;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  position: relative;
  z-index: 1;
}
.cta-banner .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

/* 页脚 */
.site-footer { 
  padding:60px 0 32px; 
  background: rgba(240, 247, 255, 0.6);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(147, 197, 253, 0.2);
}
.footer-grid { 
  display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:48px; 
}
.footer-brand { }
.footer-brand p {
  color: #4a5a6a;
  line-height: 1.7;
  margin-top: 12px;
}
.footer-col { }
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: #1a2a3a;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.footer-col a {
  display: block;
  color: #4a5a6a;
  text-decoration: none;
  padding: 4px 0;
  font-size: 0.9rem;
  transition: 0.3s;
}
.footer-col a:hover { color: #0891b2; padding-left: 4px; }
.footer-bottom { 
  border-top: 1px solid rgba(147, 197, 253, 0.2); 
  margin-top:40px; padding-top:20px; 
  text-align:center; font-size:0.85rem; 
  color: #5a6a7a;
}

/* 工具类 */
.text-accent { 
  background: linear-gradient(135deg, #0891b2, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-center { text-align:center; }
.seo-description { 
  max-width:600px; margin:0 auto 48px; 
  color: #4a5a6a; line-height: 1.7;
}
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* 气泡装饰（可选） */
.bubble {
  position: fixed;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(8, 145, 178, 0.06), transparent);
  pointer-events: none;
  z-index: -1;
}

/* ⚠️ 响应式 */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .section-title { font-size: 1.7rem; }
  .feature-block { grid-template-columns:1fr; gap: 40px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); gap: 16px; }
  .footer-grid { grid-template-columns:1fr 1fr; gap: 32px; }
  .main-nav { display:none; }
  .menu-toggle { 
    display:flex; 
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #1a2a3a;
    padding: 8px;
  }
  .main-nav.open { 
    display:flex; flex-direction:column; 
    position:absolute; top:68px; left:0; width:100%; 
    background: rgba(240, 247, 255, 0.95);
    backdrop-filter: blur(20px);
    padding:24px; 
    gap: 16px;
    border-bottom: 1px solid rgba(147, 197, 253, 0.3);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
  }
  .cta-banner { padding: 40px 24px; }
  .cta-banner h2 { font-size: 1.5rem; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.8rem; }
  .cards-grid,.content-wall,.stats-bar { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; gap: 24px; }
  .hero-buttons { flex-direction:column; align-items: stretch; }
  .hero-buttons .btn { justify-content: center; }
  .stat-item { padding: 20px 16px; }
}