/* ============================================
   优塔娱乐平台 - 独特视觉设计系统
   风格：动态渐变流体 + 柔和科技感
   主色：青柠绿 (#7FDB8A) + 珊瑚粉 (#FF6B6B)
   背景：米白 (#FDF6F0)
   ============================================ */

/* 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: #FDF6F0;
  color: #2D3436;
  line-height: 1.6;
}

/* 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, #FDF6F0 0%, #F0FFF4 100%); }

/* 导航 — 固定顶部 + 透明玻璃效果 */
.site-header { 
  position:fixed; top:0; left:0; width:100%; z-index:1000; 
  background: rgba(253, 246, 240, 0.85); 
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(127, 219, 138, 0.2);
}
.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:8px; 
  font-weight:800; font-size:1.4rem; text-decoration:none; 
  color: #2D3436;
  letter-spacing: -0.5px;
}
.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, #7FDB8A, #FF6B6B);
  color: #fff;
  box-shadow: 0 4px 12px rgba(127, 219, 138, 0.3);
}
.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; 
  color: #2D3436;
  transition:0.3s;
  position: relative;
  padding: 4px 0;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #7FDB8A, #FF6B6B);
  transition: width 0.3s ease;
}
.main-nav a:hover::after { width: 100%; }
.main-nav a:hover { color: #7FDB8A; }

.nav-cta { 
  padding:10px 24px; border-radius:50px; 
  color:#fff!important; font-weight:700; 
  background: linear-gradient(135deg, #7FDB8A, #FF6B6B);
  box-shadow: 0 4px 16px rgba(127, 219, 138, 0.3);
  transition: transform 0.3s, box-shadow 0.3s;
}
.nav-cta::after { display: none !important; }
.nav-cta:hover { 
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(127, 219, 138, 0.4);
  color: #fff !important;
}
.menu-toggle { display:none; }

/* 首页Hero — 动态流体背景 */
.hero { 
  min-height:80vh; display:flex; align-items:center; 
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, #FDF6F0 0%, #E8F8F0 40%, #F0E6FF 70%, #FFF0E6 100%);
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(127,219,138,0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: floatBlob 8s ease-in-out infinite;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,107,107,0.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: floatBlob 6s ease-in-out infinite reverse;
}
@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content { max-width:720px; position: relative; z-index: 2; }
.hero-eyebrow { 
  display:inline-block; font-size:0.8rem; font-weight:700; 
  padding:6px 18px; border-radius:50px; margin-bottom:20px; 
  background: linear-gradient(135deg, #7FDB8A, #FF6B6B);
  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: #2D3436;
  letter-spacing: -1px;
}
.hero h1 span { 
  background: linear-gradient(135deg, #7FDB8A, #FF6B6B);
  -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; 
  color: #636E72;
  line-height: 1.7;
}
.hero-buttons { display:flex; gap:16px; }
.hero-image { 
  border-radius:20px; overflow:hidden; 
  box-shadow: 0 20px 60px rgba(0,0,0,0.08);
  position: relative;
}
.hero-image img { width:100%; height:auto; display: block; }

/* 按钮 — 渐变风格 */
.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, #7FDB8A, #FF6B6B);
  box-shadow: 0 4px 20px rgba(127, 219, 138, 0.3);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(127, 219, 138, 0.4);
}
.btn-outline { 
  background:transparent; 
  border:2px solid #7FDB8A;
  color: #2D3436;
}
.btn-outline:hover {
  background: linear-gradient(135deg, #7FDB8A, #FF6B6B);
  color: #fff;
  border-color: transparent;
  transform: translateY(-3px);
}

/* 标签/标题 */
.section-label { 
  display:inline-block; font-size:0.75rem; font-weight:700; 
  letter-spacing:3px; margin-bottom:12px; 
  color: #7FDB8A;
  text-transform: uppercase;
}
.section-title { 
  font-size:2.2rem; margin-bottom:14px; 
  font-weight: 900;
  color: #2D3436;
  letter-spacing: -0.5px;
}
.section-desc { 
  max-width:600px; opacity:0.75; margin-bottom:40px; 
  color: #636E72;
  font-size: 1.05rem;
}

/* 卡片网格 — 漂浮卡片 */
.cards-grid { 
  display:grid; 
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); 
  gap:28px; 
}
.category-card { 
  border-radius:20px; padding:32px; 
  background: #fff;
  border: 1px solid rgba(127, 219, 138, 0.15);
  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, #7FDB8A, #FF6B6B);
  opacity: 0;
  transition: opacity 0.3s;
}
.category-card:hover::before { opacity: 1; }
.category-card:hover {
  transform:translateY(-6px); 
  box-shadow:0 12px 40px rgba(127, 219, 138, 0.15);
  border-color: rgba(127, 219, 138, 0.3);
}
.card-icon { 
  width:56px; height:56px; border-radius:16px; 
  display:flex; align-items:center; justify-content:center; 
  margin-bottom:20px; font-size:1.5rem;
  background: linear-gradient(135deg, rgba(127,219,138,0.1), rgba(255,107,107,0.1));
  color: #7FDB8A;
}
.category-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #2D3436;
}
.category-card p {
  font-size: 0.9rem;
  color: #636E72;
  margin-bottom: 16px;
  line-height: 1.6;
}
.card-link { 
  font-weight:700; font-size:0.85rem; text-decoration:none; 
  color: #FF6B6B;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s;
}
.card-link:hover { gap: 12px; }

/* 特性块 — 左右交错 */
.feature-block { 
  display:grid; 
  grid-template-columns:1fr 1fr; 
  gap:64px; 
  align-items:center; 
}
.feature-image { 
  border-radius:20px; overflow:hidden; 
  box-shadow: 0 16px 48px rgba(0,0,0,0.06);
}
.feature-image img { width:100%; height:auto; display: block; }
.feature-text { }
.feature-text h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #2D3436;
}
.feature-text p {
  color: #636E72;
  line-height: 1.7;
  margin-bottom: 20px;
}
.feature-list { list-style:none; }
.feature-list li { 
  padding:10px 0; display:flex; align-items:center; gap:12px; 
  font-weight: 500;
  color: #2D3436;
}
.feature-list li::before { 
  content:'✦'; 
  font-weight:700; 
  color: #7FDB8A;
  font-size: 1.1rem;
}

/* 数据条 — 渐变数字 */
.stats-bar { 
  display:grid; 
  grid-template-columns:repeat(4,1fr); 
  gap:24px; 
  text-align:center; 
}
.stat-item { 
  padding:32px 24px; border-radius:20px; 
  background: #fff;
  border: 1px solid rgba(127, 219, 138, 0.15);
  transition: 0.3s;
}
.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(127, 219, 138, 0.12);
}
.stat-number { 
  font-size:2.6rem; font-weight:900; 
  background: linear-gradient(135deg, #7FDB8A, #FF6B6B);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { 
  font-size:0.9rem; opacity:0.6; margin-top:8px; 
  color: #636E72;
  font-weight: 500;
}

/* 内容墙 — 新闻卡片 */
.content-wall { 
  display:grid; 
  grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); 
  gap:28px; 
}
.content-wall-item { 
  border-radius:20px; overflow:hidden; 
  background: #fff;
  border: 1px solid rgba(127, 219, 138, 0.15);
  transition:0.3s; 
}
.content-wall-item:hover {
  transform:translateY(-6px); 
  box-shadow:0 12px 40px rgba(127, 219, 138, 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 h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #2D3436;
}
.content-wall-body p {
  font-size: 0.9rem;
  color: #636E72;
  line-height: 1.6;
}
.content-wall-body .meta {
  font-size: 0.8rem;
  color: #7FDB8A;
  font-weight: 600;
  margin-top: 12px;
  display: block;
}

/* FAQ — 圆润折叠 */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { 
  border:1px solid rgba(127, 219, 138, 0.2); 
  border-radius:16px; 
  margin-bottom:12px; 
  overflow:hidden; 
  cursor:pointer; 
  background: #fff;
  transition: 0.3s;
}
.faq-item:hover {
  border-color: rgba(127, 219, 138, 0.4);
  box-shadow: 0 4px 16px rgba(127, 219, 138, 0.08);
}
.faq-item .faq-question { 
  padding:20px 24px; font-weight:700; 
  display:flex; justify-content:space-between; 
  color: #2D3436;
  font-size: 1.05rem;
}
.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: #7FDB8A;
  transition: transform 0.3s;
}
.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}
.faq-item .faq-answer { 
  padding:0 24px 20px; display:none; 
  color: #636E72;
  line-height: 1.7;
}
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 — 渐变大横幅 */
.cta-banner { 
  padding:64px 24px; text-align:center; border-radius:24px; 
  background: linear-gradient(135deg, #7FDB8A, #FF6B6B);
  box-shadow: 0 16px 48px rgba(127, 219, 138, 0.25);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
}
.cta-banner h2 { 
  color:#fff; 
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 12px;
}
.cta-banner p {
  color: rgba(255,255,255,0.85);
  font-size: 1.1rem;
  margin-bottom: 28px;
}
.cta-banner .btn-primary { 
  background:#fff; 
  color: #2D3436;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}
.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

/* 页脚 — 浅色渐变 */
.site-footer { 
  padding:64px 0 32px; 
  background: linear-gradient(180deg, #FDF6F0, #F0FFF4);
  border-top: 1px solid rgba(127, 219, 138, 0.15);
}
.site-footer .container { }
.footer-grid { 
  display:grid; 
  grid-template-columns:2fr 1fr 1fr 1fr; 
  gap:48px; 
}
.footer-brand { }
.footer-brand h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #2D3436;
}
.footer-brand p {
  color: #636E72;
  font-size: 0.9rem;
  line-height: 1.7;
}
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
  color: #2D3436;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  color: #636E72;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s;
}
.footer-col ul li a:hover { color: #7FDB8A; }
.footer-bottom { 
  border-top:1px solid rgba(127, 219, 138, 0.15); 
  margin-top:48px; padding-top:24px; 
  text-align:center; font-size:0.85rem; 
  color: #636E72;
}

/* 工具类 */
.text-accent { 
  background: linear-gradient(135deg, #7FDB8A, #FF6B6B);
  -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: #636E72;
  font-size: 1.05rem;
  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; gap: 40px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; gap: 32px; }
  .main-nav { display:none; }
  .menu-toggle { display:flex; background: none; border: none; cursor: pointer; padding: 8px; }
  .menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #2D3436;
    margin: 5px 0;
    border-radius: 2px;
    transition: 0.3s;
  }
  .main-nav.open { 
    display:flex; flex-direction:column; 
    position:absolute; top:68px; left:0; width:100%; 
    background: rgba(253, 246, 240, 0.98);
    backdrop-filter: blur(20px);
    padding:24px;
    gap: 16px;
    border-bottom: 1px solid rgba(127, 219, 138, 0.2);
  }
  .hero h1 { font-size: 2.2rem; }
  .section-title { font-size: 1.6rem; }
  .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; }
  .hero h1 { font-size: 1.8rem; }
  .stat-number { font-size: 2rem; }
  .cta-banner { padding: 40px 20px; }
  .cta-banner h2 { font-size: 1.5rem; }
}