/* ============================================
   三昇体育 · 跃动未来
   设计系统：活力渐变 · 流体卡片 · 动态光晕
   ============================================ */

/* 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: #f7fafc;
  color: #1a2e3b;
}

/* 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: linear-gradient(135deg, #e8f4f8 0%, #f0f7fa 100%);
}

/* 导航 — 固定顶部 — 轻玻璃 + 光晕 */
.site-header { 
  position:fixed; top:0; left:0; width:100%; z-index:1000; 
  background: rgba(247,250,252,0.92); 
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,159,183,0.15);
  box-shadow: 0 2px 20px rgba(0,159,183,0.06);
}
.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: #009FB7;
  letter-spacing: 1px;
}
.logo-icon { 
  width:38px; height:38px; border-radius:10px; 
  display:flex; align-items:center; justify-content:center; 
  font-size:1.1rem; 
  background: linear-gradient(135deg, #009FB7, #5BC0BE);
  color: #fff;
  box-shadow: 0 4px 10px rgba(0,159,183,0.25);
}
.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; 
  transition:0.2s; color: #1a2e3b;
  position: relative;
  padding-bottom: 3px;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #009FB7, #5BC0BE);
  transition: width 0.3s;
}
.main-nav a:hover::after { width: 100%; }
.main-nav a:hover { color: #009FB7; }
.nav-cta { 
  padding:9px 22px; border-radius:30px; 
  color:#fff!important; font-weight:600; 
  background: linear-gradient(135deg, #009FB7, #5BC0BE);
  box-shadow: 0 4px 14px rgba(0,159,183,0.3);
  transition: all 0.3s;
}
.nav-cta:hover { 
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,159,183,0.4);
}
.nav-cta::after { display: none !important; }
.menu-toggle { display:none; }

/* 首页Hero — 渐变流体 + 动态光晕 */
.hero { 
  min-height:75vh; 
  display:flex; align-items:center; 
  position: relative;
  background: linear-gradient(160deg, #d4f1f4 0%, #b9e6eb 40%, #e0f3f7 100%);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(91,192,190,0.2) 0%, transparent 70%);
  border-radius: 50%;
  animation: heroGlow 8s ease-in-out infinite alternate;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0,159,183,0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: heroGlow 10s ease-in-out infinite alternate-reverse;
}
@keyframes heroGlow {
  0% { transform: translate(0,0) scale(1); opacity:0.6; }
  100% { transform: translate(40px,30px) scale(1.3); opacity:1; }
}
.hero-content { 
  max-width:720px; 
  position: relative;
  z-index: 2;
}
.hero-eyebrow { 
  display:inline-block; 
  font-size:0.8rem; 
  font-weight:700; 
  padding:5px 16px; 
  border-radius:30px; 
  margin-bottom:18px; 
  background: rgba(0,159,183,0.12);
  color: #009FB7;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.hero h1 { 
  font-size:3rem; 
  line-height:1.15; 
  margin-bottom:20px; 
  font-weight: 800;
  background: linear-gradient(135deg, #1a2e3b 0%, #009FB7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p { 
  font-size:1.15rem; 
  opacity:0.8; 
  max-width:560px; 
  margin-bottom:34px; 
  color: #2c4a5a;
  line-height: 1.7;
}
.hero-buttons { display:flex; gap:14px; }
.hero-image { 
  border-radius:20px; 
  overflow:hidden; 
  position: relative;
  box-shadow: 0 20px 40px rgba(0,159,183,0.15);
}
.hero-image img { width:100%; height:auto; display: block; }

/* 按钮 — 圆润渐变 */
.btn { 
  display:inline-flex; align-items:center; gap:8px; 
  padding:13px 30px; border-radius:40px; 
  font-weight:600; cursor:pointer; border:none; 
  text-decoration:none; transition:0.3s; 
  font-size: 0.95rem;
}
.btn-primary { 
  color:#fff; 
  background: linear-gradient(135deg, #009FB7, #5BC0BE);
  box-shadow: 0 4px 16px rgba(0,159,183,0.3);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0,159,183,0.4);
}
.btn-outline { 
  background:transparent; 
  border:2px solid #009FB7;
  color: #009FB7;
}
.btn-outline:hover {
  background: rgba(0,159,183,0.08);
  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; 
  color: #009FB7;
  text-transform: uppercase;
}
.section-title { 
  font-size:2.2rem; 
  margin-bottom:14px; 
  font-weight: 800;
  color: #1a2e3b;
  line-height: 1.2;
}
.section-desc { 
  max-width:600px; 
  opacity:0.7; 
  margin-bottom:44px; 
  font-size: 1.05rem;
  color: #2c4a5a;
}

/* 卡片网格 — 流体卡片层叠 */
.cards-grid { 
  display:grid; 
  grid-template-columns:repeat(auto-fill,minmax(270px,1fr)); 
  gap:28px; 
}
.category-card { 
  border-radius:20px; 
  padding:32px 28px; 
  border: none;
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 30px rgba(0,159,183,0.08);
  transition: 0.4s cubic-bezier(0.25,0.46,0.45,0.94);
  position: relative;
  overflow: hidden;
}
.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #009FB7, #5BC0BE);
  opacity: 0;
  transition: opacity 0.4s;
}
.category-card:hover::before { opacity: 1; }
.category-card:hover { 
  transform:translateY(-6px); 
  box-shadow: 0 12px 40px rgba(0,159,183,0.15);
  background: rgba(255,255,255,0.9);
}
.card-icon { 
  width:52px; height:52px; border-radius:16px; 
  display:flex; align-items:center; justify-content:center; 
  margin-bottom:18px; font-size:1.4rem; 
  background: linear-gradient(135deg, #d4f1f4, #b9e6eb);
  color: #009FB7;
}
.card-link { 
  font-weight:600; font-size:0.85rem; text-decoration:none; 
  color: #009FB7;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s;
}
.card-link:hover { gap: 10px; }

/* 特性块 — 左右流体布局 */
.feature-block { 
  display:grid; 
  grid-template-columns:1fr 1fr; 
  gap:60px; 
  align-items:center; 
}
.feature-image { 
  border-radius:20px; 
  overflow:hidden; 
  box-shadow: 0 16px 40px rgba(0,159,183,0.1);
}
.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: #2c4a5a;
}
.feature-list li::before { 
  content:'✓'; 
  font-weight:700; 
  color: #009FB7;
  background: rgba(0,159,183,0.1);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
}

/* 数据条 — 渐变数字卡片 */
.stats-bar { 
  display:grid; 
  grid-template-columns:repeat(4,1fr); 
  gap:24px; 
  text-align:center; 
}
.stat-item { 
  padding:32px 20px; 
  border-radius:20px; 
  border: none;
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(6px);
  box-shadow: 0 4px 20px rgba(0,159,183,0.06);
  transition: 0.3s;
}
.stat-item:hover {
  background: rgba(255,255,255,0.9);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,159,183,0.12);
}
.stat-number { 
  font-size:2.4rem; 
  font-weight:800; 
  background: linear-gradient(135deg, #009FB7, #5BC0BE);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}
.stat-label { 
  font-size:0.9rem; 
  opacity:0.6; 
  margin-top:8px; 
  color: #2c4a5a;
  font-weight: 500;
}

/* 内容墙 — 磨砂卡片 */
.content-wall { 
  display:grid; 
  grid-template-columns:repeat(auto-fill,minmax(290px,1fr)); 
  gap:28px; 
}
.content-wall-item { 
  border-radius:20px; 
  overflow:hidden; 
  border: none;
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(6px);
  box-shadow: 0 4px 20px rgba(0,159,183,0.06);
  transition: 0.4s cubic-bezier(0.25,0.46,0.45,0.94);
}
.content-wall-item:hover { 
  transform:translateY(-6px); 
  box-shadow: 0 12px 40px rgba(0,159,183,0.12);
  background: rgba(255,255,255,0.95);
}
.content-wall-item img { 
  width:100%; height:210px; object-fit:cover; 
  transition: transform 0.5s;
}
.content-wall-item:hover img { transform: scale(1.05); }
.content-wall-body { padding:22px; }
.content-wall-body h3 { font-size: 1.1rem; margin-bottom: 8px; color: #1a2e3b; }
.content-wall-body p { font-size: 0.9rem; opacity: 0.7; color: #2c4a5a; }

/* FAQ — 简约折叠 */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { 
  border: none;
  border-radius:16px; 
  margin-bottom:10px; 
  overflow:hidden; 
  cursor:pointer; 
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(4px);
  box-shadow: 0 2px 12px rgba(0,159,183,0.04);
  transition: 0.3s;
}
.faq-item:hover { background: rgba(255,255,255,0.9); }
.faq-item .faq-question { 
  padding:18px 22px; 
  font-weight:600; 
  display:flex; 
  justify-content:space-between; 
  color: #1a2e3b;
  font-size: 1rem;
}
.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  color: #009FB7;
  transition: transform 0.3s;
}
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-item .faq-answer { 
  padding:0 22px 18px; 
  display:none; 
  opacity:0.75; 
  color: #2c4a5a;
  line-height: 1.7;
}
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 — 渐变流体 */
.cta-banner { 
  padding:64px 24px; 
  text-align:center; 
  border-radius:24px; 
  background: linear-gradient(135deg, #009FB7, #5BC0BE, #4a9e9c);
  color:#fff; 
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: ctaGlow 6s ease-in-out infinite alternate;
}
@keyframes ctaGlow {
  0% { transform: translate(0,0) scale(1); }
  100% { transform: translate(30px,-20px) scale(1.2); }
}
.cta-banner h2 { 
  color:#fff; 
  font-size: 2.2rem;
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}
.cta-banner p {
  color: rgba(255,255,255,0.85);
  margin-bottom: 28px;
  position: relative;
  z-index: 2;
}
.cta-banner .btn-primary { 
  background:#fff; 
  color: #009FB7;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  position: relative;
  z-index: 2;
}
.cta-banner .btn-primary:hover { 
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

/* 页脚 — 浅色渐变 */
.site-footer { 
  padding:60px 0 28px; 
  background: linear-gradient(180deg, #e8f4f8 0%, #f7fafc 100%);
  border-top: 1px solid rgba(0,159,183,0.08);
}
.site-footer .container { }
.footer-grid { 
  display:grid; 
  grid-template-columns:2fr 1fr 1fr 1fr; 
  gap:44px; 
}
.footer-brand { }
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand p { font-size: 0.9rem; opacity: 0.6; color: #2c4a5a; }
.footer-col { }
.footer-col h4 { 
  font-size: 0.95rem; 
  font-weight: 700; 
  margin-bottom: 16px; 
  color: #1a2e3b;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a { 
  text-decoration: none; 
  color: #2c4a5a; 
  font-size: 0.9rem; 
  opacity: 0.7;
  transition: opacity 0.2s;
}
.footer-col ul a:hover { opacity: 1; color: #009FB7; }
.footer-bottom { 
  border-top: 1px solid rgba(0,159,183,0.1); 
  margin-top:44px; 
  padding-top:22px; 
  text-align:center; 
  font-size:0.85rem; 
  color: #2c4a5a;
  opacity: 0.6;
}

/* 工具类 */
.text-accent { color: #009FB7; }
.text-center { text-align:center; }
.seo-description { 
  max-width:600px; 
  margin:0 auto 48px; 
  opacity:0.7; 
  color: #2c4a5a;
}
.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); }
  .footer-grid { grid-template-columns:1fr 1fr; gap: 30px; }
  .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: rgba(247,250,252,0.98);
    backdrop-filter: blur(12px);
    padding:24px 20px; 
    border-bottom: 1px solid rgba(0,159,183,0.1);
  }
  .hero h1 { font-size: 2.2rem; }
  .section-title { font-size: 1.8rem; }
}
@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; gap: 12px; }
  .hero h1 { font-size: 1.8rem; }
  .hero { min-height: 60vh; }
}