/* =============================================
   V66体育 - 跃动新极限 设计系统
   风格：活力橙白 + 动态斜线切割 + 几何图形点缀
   配色：活力橙 (#FF6B35) + 深蓝 (#1A2A3A) + 米白 (#FFF9F5)
   ============================================= */

/* 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: #FFF9F5;
  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:#F5F0EB; }

/* 装饰性斜线背景 */
.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 20px,
    rgba(255, 107, 53, 0.03) 20px,
    rgba(255, 107, 53, 0.03) 21px
  );
  pointer-events: none;
  z-index: 0;
}

.section > .container {
  position: relative;
  z-index: 1;
}

/* 导航 — 固定顶部 */
.site-header { 
  position:fixed; 
  top:0; 
  left:0; 
  width:100%; 
  z-index:1000; 
  background:rgba(255, 249, 245, 0.95); 
  backdrop-filter:blur(10px); 
  border-bottom: 2px solid #FF6B35;
}
.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:1.4rem; 
  text-decoration:none; 
  color:#1A2A3A;
  letter-spacing: -0.5px;
}
.logo-icon { 
  width:40px; 
  height:40px; 
  border-radius: 12px 4px 12px 4px;
  display:flex; 
  align-items:center; 
  justify-content:center; 
  font-size:1.2rem;
  background: linear-gradient(135deg, #FF6B35, #FF8F65);
  color: #fff;
  font-weight: 900;
  transform: rotate(-5deg);
}
.main-nav { 
  display:flex; 
  align-items:center; 
  gap:32px; 
  list-style:none; 
}
.main-nav a { 
  text-decoration:none; 
  font-size:0.9rem; 
  font-weight:600; 
  transition:0.3s;
  color: #1A2A3A;
  position: relative;
  padding-bottom: 4px;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: #FF6B35;
  transition: width 0.3s;
}
.main-nav a:hover::after {
  width: 100%;
}
.main-nav a:hover {
  color: #FF6B35;
}
.nav-cta { 
  padding:10px 24px; 
  border-radius: 50px; 
  color:#fff!important; 
  font-weight:700; 
  background: linear-gradient(135deg, #FF6B35, #FF8F65);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}
.nav-cta::after {
  display: none !important;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}
.menu-toggle { display:none; }

/* 首页Hero */
.hero { 
  min-height:85vh; 
  display:flex; 
  align-items:center;
  background: linear-gradient(135deg, #FFF9F5 0%, #FFE8DC 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.hero::after {
  content: 'V66';
  position: absolute;
  bottom: -20%;
  left: -10%;
  font-size: 400px;
  font-weight: 900;
  color: rgba(255, 107, 53, 0.04);
  letter-spacing: -20px;
  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:20px;
  background: #FF6B35;
  color: #fff;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.hero h1 { 
  font-size:3.2rem; 
  line-height:1.1; 
  margin-bottom:20px;
  font-weight: 900;
  color: #1A2A3A;
}
.hero h1 span {
  background: linear-gradient(135deg, #FF6B35, #FF8F65);
  -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:36px;
  line-height: 1.7;
}
.hero-buttons { 
  display:flex; 
  gap:16px; 
}
.hero-image { 
  border-radius:20px; 
  overflow:hidden;
  box-shadow: 20px 20px 40px rgba(255, 107, 53, 0.15);
  transform: rotate(-2deg);
  border: 4px solid #fff;
}

/* 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 { 
  color:#fff; 
  background: linear-gradient(135deg, #FF6B35, #FF8F65);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.4);
}
.btn-outline { 
  background:transparent; 
  border:2px solid #FF6B35;
  color: #FF6B35;
}
.btn-outline:hover {
  background: #FF6B35;
  color: #fff;
}

/* 标签/标题 */
.section-label { 
  display:inline-block; 
  font-size:0.75rem; 
  font-weight:700; 
  letter-spacing:3px; 
  margin-bottom:12px;
  color: #FF6B35;
  text-transform: uppercase;
}
.section-title { 
  font-size:2.4rem; 
  margin-bottom:14px;
  font-weight: 900;
  color: #1A2A3A;
  line-height: 1.2;
}
.section-desc { 
  max-width:600px; 
  opacity:0.7; 
  margin-bottom:40px;
  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:16px; 
  padding:32px; 
  border:2px solid #E8DDD5;
  transition:0.3s;
  background: #fff;
  position: relative;
  overflow: hidden;
}
.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, #FF6B35, #FF8F65);
  transition: width 0.3s;
}
.category-card:hover::before {
  width: 8px;
}
.category-card:hover {
  transform:translateY(-5px); 
  box-shadow:0 8px 30px rgba(255, 107, 53, 0.1);
  border-color: #FF6B35;
}
.card-icon { 
  width:56px; 
  height:56px; 
  border-radius:14px; 
  display:flex; 
  align-items:center; 
  justify-content:center; 
  margin-bottom:20px; 
  font-size:1.5rem;
  background: linear-gradient(135deg, #FFE8DC, #FFF9F5);
  color: #FF6B35;
}
.card-link { 
  font-weight:700; 
  font-size:0.85rem; 
  text-decoration:none;
  color: #FF6B35;
  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: 15px 15px 30px rgba(255, 107, 53, 0.1);
  border: 3px solid #fff;
}
.feature-image img { width:100%; height:auto; display: block; }
.feature-text { }
.feature-list { 
  list-style:none; 
  margin-top: 20px;
}
.feature-list li { 
  padding:10px 0; 
  display:flex; 
  align-items:center; 
  gap:12px;
  font-weight: 500;
  border-bottom: 1px solid #F0E8E0;
}
.feature-list li:last-child {
  border-bottom: none;
}
.feature-list li::before { 
  content:'✓'; 
  font-weight:900;
  color: #FF6B35;
  background: rgba(255, 107, 53, 0.1);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 0.9rem;
}

/* 数据条 */
.stats-bar { 
  display:grid; 
  grid-template-columns:repeat(4,1fr); 
  gap:24px; 
  text-align:center; 
}
.stat-item { 
  padding:32px 24px; 
  border-radius:16px; 
  border:2px solid #E8DDD5;
  background: #fff;
  transition: 0.3s;
}
.stat-item:hover {
  border-color: #FF6B35;
  transform: translateY(-3px);
}
.stat-number { 
  font-size:2.6rem; 
  font-weight:900;
  color: #FF6B35;
  line-height: 1;
}
.stat-label { 
  font-size:0.9rem; 
  opacity:0.6; 
  margin-top:8px;
  font-weight: 600;
}

/* 内容墙 */
.content-wall { 
  display:grid; 
  grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); 
  gap:28px; 
}
.content-wall-item { 
  border-radius:16px; 
  overflow:hidden; 
  border:2px solid #E8DDD5;
  transition:0.3s;
  background: #fff;
}
.content-wall-item:hover {
  transform:translateY(-5px); 
  box-shadow:0 8px 30px rgba(255, 107, 53, 0.1);
  border-color: #FF6B35;
}
.content-wall-item img { 
  width:100%; 
  height:220px; 
  object-fit:cover; 
  display: block;
}
.content-wall-body { 
  padding:24px; 
}
.content-wall-body h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.content-wall-body p {
  opacity: 0.7;
  line-height: 1.6;
}

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { 
  border:2px solid #E8DDD5; 
  border-radius:12px; 
  margin-bottom:12px; 
  overflow:hidden; 
  cursor:pointer;
  background: #fff;
  transition: 0.3s;
}
.faq-item:hover {
  border-color: #FF6B35;
}
.faq-item .faq-question { 
  padding:20px 24px; 
  font-weight:700; 
  display:flex; 
  justify-content:space-between;
  align-items: center;
  color: #1A2A3A;
  font-size: 1rem;
}
.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: #FF6B35;
  transition: transform 0.3s;
}
.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}
.faq-item .faq-answer { 
  padding:0 24px 20px; 
  display:none; 
  opacity:0.8;
  line-height: 1.7;
}
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { 
  padding:64px 32px; 
  text-align:center; 
  border-radius:20px; 
  background: linear-gradient(135deg, #FF6B35, #FF8F65);
  color:#fff;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 400px;
  height: 400px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}
.cta-banner h2 { 
  color:#fff;
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 16px;
}
.cta-banner p {
  opacity: 0.9;
  max-width: 500px;
  margin: 0 auto 28px;
  line-height: 1.6;
}
.cta-banner .btn-primary { 
  background:#fff;
  color: #FF6B35;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.cta-banner .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

/* 页脚 */
.site-footer { 
  padding:64px 0 32px; 
  background: #1A2A3A;
  color: rgba(255,255,255,0.8);
}
.site-footer .container { }
.footer-grid { 
  display:grid; 
  grid-template-columns:2fr 1fr 1fr 1fr; 
  gap:40px; 
}
.footer-brand {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.9rem;
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.footer-col ul {
  list-style: none;
}
.footer-col ul li {
  padding: 6px 0;
  opacity: 0.7;
  transition: 0.3s;
  cursor: pointer;
}
.footer-col ul li:hover {
  opacity: 1;
  color: #FF6B35;
}
.footer-bottom { 
  border-top:1px solid rgba(255,255,255,0.1); 
  margin-top:48px; 
  padding-top:24px; 
  text-align:center; 
  font-size:0.85rem;
  opacity: 0.6;
}

/* 工具类 */
.text-accent { color: #FF6B35; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.7; line-height: 1.7; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* 响应式 */
@media (max-width: 768px) {
  .feature-block { grid-template-columns:1fr; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .main-nav { display:none; }
  .menu-toggle { display:flex; }
  .menu-toggle button {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #1A2A3A;
  }
  .main-nav.open { 
    display:flex; 
    flex-direction:column; 
    position:absolute; 
    top:68px; 
    left:0; 
    width:100%; 
    background:#FFF9F5; 
    padding:24px;
    border-bottom: 2px solid #FF6B35;
    gap: 16px;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
  .hero::after {
    font-size: 200px;
  }
  .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; }
  .hero h1 {
    font-size: 1.8rem;
  }
  .hero::after {
    display: none;
  }
}