/* ========================================
   AWWWARDS-LEVEL DESIGN SYSTEM
   Brand: 抢庄牛牛游戏app · 速赢天下
   Style: 珊瑚竞技 · 热带动感
   ======================================== */

/* 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: #FFFAF5;
  color: #2D3E50;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* 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, #FFF5EF 0%, #F0F9F8 100%); }

/* 导航 — 固定顶部 */
.site-header {
  position:fixed;
  top:0;
  left:0;
  width:100%;
  z-index:1000;
  background: rgba(255,250,245,0.85);
  backdrop-filter:blur(16px) saturate(180%);
  -webkit-backdrop-filter:blur(16px) saturate(180%);
  border-bottom: 2px solid rgba(255,107,53,0.12);
  box-shadow: 0 2px 40px rgba(255,107,53,0.06);
}
.header-inner {
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
  max-width:1200px;
  margin:0 auto;
  padding:0 28px;
}
.logo {
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:1.25rem;
  text-decoration:none;
  color:#2D3E50;
  letter-spacing: -0.3px;
  position:relative;
}
.logo-icon {
  width:42px;
  height:42px;
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.3rem;
  background: linear-gradient(135deg, #FF6B35, #FF8C5A);
  color:#fff;
  box-shadow: 0 4px 12px rgba(255,107,53,0.3);
}
.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:#4A5A6E;
  position:relative;
  padding:4px 0;
  transition: color 0.3s ease;
  letter-spacing: 0.3px;
}
.main-nav a::after {
  content:'';
  position:absolute;
  bottom:-2px;
  left:0;
  width:0;
  height:2.5px;
  background: linear-gradient(90deg, #FF6B35, #FFB703);
  border-radius:4px;
  transition: width 0.35s cubic-bezier(0.25,0.46,0.45,0.94);
}
.main-nav a:hover { color:#FF6B35; }
.main-nav a:hover::after { width:100%; }
.nav-cta {
  padding:10px 24px !important;
  border-radius:50px !important;
  color:#fff !important;
  font-weight:700;
  background: linear-gradient(135deg, #FF6B35, #E85D75);
  box-shadow: 0 4px 16px rgba(255,107,53,0.3);
  transition: all 0.3s ease !important;
  letter-spacing: 0.5px;
}
.nav-cta::after { display:none !important; }
.nav-cta:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 28px rgba(255,107,53,0.4) !important;
  color:#fff !important;
}
.menu-toggle {
  display:none;
  width:44px;
  height:44px;
  border-radius:12px;
  border: none;
  background: #F0EDEA;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  font-size:1.4rem;
  color:#2D3E50;
  transition: 0.2s;
}
.menu-toggle:hover { background:#E8E3DE; }

/* 首页Hero */
.hero {
  min-height:85vh;
  display:flex;
  align-items:center;
  position:relative;
  background: linear-gradient(165deg, #FFFAF5 0%, #FFF0E8 40%, #F0F9F7 100%);
  overflow:hidden;
}
.hero::before {
  content:'🐂';
  position:absolute;
  right:-60px;
  top:10%;
  font-size:28vw;
  opacity:0.06;
  transform: rotate(12deg);
  pointer-events:none;
}
.hero::after {
  content:'';
  position:absolute;
  bottom:0;
  left:0;
  width:100%;
  height:6px;
  background: linear-gradient(90deg, #FF6B35, #FFB703, #2EC4B6);
}
.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, rgba(255,107,53,0.12), rgba(255,183,3,0.12));
  color:#FF6B35;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  border: 1px solid rgba(255,107,53,0.15);
}
.hero h1 {
  font-size:3.4rem;
  line-height:1.1;
  margin-bottom:20px;
  font-weight:900;
  background: linear-gradient(135deg, #2D3E50 30%, #FF6B35 80%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  letter-spacing: -1px;
}
.hero p {
  font-size:1.15rem;
  opacity:0.7;
  max-width:560px;
  margin-bottom:36px;
  color:#4A5A6E;
  font-weight:400;
  line-height:1.7;
}
.hero-buttons { display:flex; gap:16px; flex-wrap:wrap; }
.hero-image {
  border-radius:20px;
  overflow:hidden;
  box-shadow: 0 20px 60px rgba(255,107,53,0.15);
  border: 2px solid rgba(255,255,255,0.6);
  position:relative;
}
.hero-image img { width:100%; height:auto; display:block; }
.hero-image::after {
  content:'⚡';
  position:absolute;
  top:12px;
  right:12px;
  font-size:1.6rem;
  background: rgba(255,255,255,0.85);
  width:44px;
  height:44px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  backdrop-filter:blur(4px);
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

/* 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: all 0.3s cubic-bezier(0.25,0.46,0.45,0.94);
  font-size:0.95rem;
  letter-spacing: 0.3px;
}
.btn-primary {
  color:#fff;
  background: linear-gradient(135deg, #FF6B35, #E85D75);
  box-shadow: 0 4px 20px rgba(255,107,53,0.3);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(255,107,53,0.4);
}
.btn-outline {
  background:transparent;
  border:2px solid #FF6B35;
  color:#FF6B35;
}
.btn-outline:hover {
  background: rgba(255,107,53,0.08);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,107,53,0.12);
}

/* 标签/标题 */
.section-label {
  display:inline-block;
  font-size:0.75rem;
  font-weight:700;
  letter-spacing:2.5px;
  margin-bottom:14px;
  color:#FF6B35;
  text-transform: uppercase;
  position:relative;
  padding-left:36px;
}
.section-label::before {
  content:'';
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%);
  width:24px;
  height:2.5px;
  background: linear-gradient(90deg, #FF6B35, #FFB703);
  border-radius:4px;
}
.section-title {
  font-size:2.4rem;
  margin-bottom:16px;
  font-weight:900;
  color:#2D3E50;
  letter-spacing: -0.5px;
  line-height:1.2;
}
.section-desc {
  max-width:600px;
  opacity:0.65;
  margin-bottom:44px;
  font-size:1.05rem;
  color:#4A5A6E;
  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 28px;
  background:#fff;
  border: 1px solid rgba(255,107,53,0.08);
  transition: all 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, #FF6B35, #FFB703);
  opacity:0;
  transition: opacity 0.4s ease;
}
.category-card:hover {
  transform:translateY(-6px);
  box-shadow:0 16px 48px rgba(255,107,53,0.12);
  border-color: rgba(255,107,53,0.15);
}
.category-card:hover::before { opacity:1; }
.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, #FFF0E8, #FFE8D8);
  color:#FF6B35;
  transition: 0.3s;
}
.category-card:hover .card-icon {
  background: linear-gradient(135deg, #FF6B35, #FF8C5A);
  color:#fff;
  transform: scale(1.05);
}
.card-link {
  font-weight:700;
  font-size:0.9rem;
  text-decoration:none;
  color:#FF6B35;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition: gap 0.3s ease;
  margin-top:12px;
}
.card-link:hover { gap:12px; }

/* 特性块 */
.feature-block {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}
.feature-block:nth-child(even) .feature-image { order:2; }
.feature-block:nth-child(even) .feature-text { order:1; }
.feature-image {
  border-radius:18px;
  overflow:hidden;
  box-shadow: 0 16px 48px rgba(46,196,182,0.12);
  border: 2px solid rgba(46,196,182,0.15);
  position:relative;
}
.feature-image img { width:100%; height:auto; display:block; }
.feature-text { }
.feature-text .section-title { margin-top:0; }
.feature-list {
  list-style:none;
  margin-top:20px;
}
.feature-list li {
  padding:10px 0;
  display:flex;
  align-items:center;
  gap:12px;
  font-weight:500;
  color:#2D3E50;
  border-bottom: 1px solid rgba(0,0,0,0.04);
}
.feature-list li:last-child { border-bottom:none; }
.feature-list li::before {
  content:'✓';
  font-weight:800;
  color:#2EC4B6;
  width:24px;
  height:24px;
  background: rgba(46,196,182,0.1);
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:0.8rem;
}

/* 数据条 */
.stats-bar {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  text-align:center;
}
.stat-item {
  padding:32px 20px;
  border-radius:16px;
  background:#fff;
  border: 1px solid rgba(0,0,0,0.04);
  box-shadow: 0 4px 20px rgba(0,0,0,0.03);
  transition: 0.3s ease;
  position:relative;
  overflow:hidden;
}
.stat-item::after {
  content:'';
  position:absolute;
  bottom:0;
  left:0;
  width:100%;
  height:3px;
  background: linear-gradient(90deg, #FF6B35, #2EC4B6);
  opacity:0.6;
}
.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(255,107,53,0.08);
}
.stat-number {
  font-size:2.6rem;
  font-weight:900;
  color:#FF6B35;
  line-height:1;
  letter-spacing: -1px;
}
.stat-label {
  font-size:0.9rem;
  opacity:0.6;
  margin-top:8px;
  color:#4A5A6E;
  font-weight:500;
}

/* 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;
  background:#fff;
  border: 1px solid rgba(0,0,0,0.04);
  transition: all 0.4s cubic-bezier(0.25,0.46,0.45,0.94);
}
.content-wall-item:hover {
  transform:translateY(-6px);
  box-shadow:0 16px 48px rgba(255,107,53,0.1);
  border-color: rgba(255,107,53,0.1);
}
.content-wall-item img {
  width:100%;
  height:210px;
  object-fit:cover;
}
.content-wall-body { padding:24px 22px 26px; }
.content-wall-body h3 {
  font-size:1.15rem;
  margin-bottom:8px;
  font-weight:700;
  color:#2D3E50;
}
.content-wall-body p {
  font-size:0.9rem;
  opacity:0.6;
  line-height:1.6;
}

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item {
  border: 1px solid rgba(0,0,0,0.05);
  border-radius:14px;
  margin-bottom:10px;
  overflow:hidden;
  cursor:pointer;
  background:#fff;
  transition: 0.2s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}
.faq-item:hover {
  border-color: rgba(255,107,53,0.12);
  box-shadow: 0 4px 16px rgba(255,107,53,0.04);
}
.faq-item .faq-question {
  padding:18px 24px;
  font-weight:700;
  display:flex;
  justify-content:space-between;
  align-items:center;
  color:#2D3E50;
  font-size:1rem;
  letter-spacing:0.2px;
}
.faq-item .faq-question::after {
  content:'+';
  font-size:1.4rem;
  font-weight:300;
  color:#FF6B35;
  transition: transform 0.3s ease;
}
.faq-item.open .faq-question::after {
  content:'−';
  transform: rotate(180deg);
}
.faq-item .faq-answer {
  padding:0 24px 20px;
  display:none;
  opacity:0.7;
  color:#4A5A6E;
  line-height:1.7;
}
.faq-item.open .faq-answer {
  display:block;
  animation: fadeSlideIn 0.3s ease;
}
@keyframes fadeSlideIn {
  from { opacity:0; transform:translateY(-6px); }
  to { opacity:1; transform:translateY(0); }
}

/* CTA横幅 */
.cta-banner {
  padding:64px 40px;
  text-align:center;
  border-radius:20px;
  background: linear-gradient(135deg, #FF6B35, #E85D75, #FFB703);
  color:#fff;
  position:relative;
  overflow:hidden;
}
.cta-banner::before {
  content:'🐂⚡';
  position:absolute;
  right:20px;
  bottom:10px;
  font-size:6rem;
  opacity:0.1;
  pointer-events:none;
}
.cta-banner h2 {
  color:#fff;
  font-size:2.2rem;
  font-weight:900;
  margin-bottom:12px;
  letter-spacing:-0.3px;
}
.cta-banner p {
  color: rgba(255,255,255,0.85);
  max-width:540px;
  margin:0 auto 28px;
  font-size:1.05rem;
  line-height:1.6;
}
.cta-banner .btn-primary {
  background:#fff;
  color:#FF6B35;
  box-shadow: 0 6px 24px rgba(0,0,0,0.12);
}
.cta-banner .btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}

/* 页脚 */
.site-footer {
  padding:64px 0 28px;
  background:#2D3E50;
  color: rgba(255,255,255,0.7);
}
.footer-grid {
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:48px;
}
.footer-brand { }
.footer-brand .logo { color:#fff; margin-bottom:12px; }
.footer-brand p { font-size:0.9rem; opacity:0.65; line-height:1.7; max-width:320px; }
.footer-col h4 {
  font-size:0.85rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:1.5px;
  margin-bottom:18px;
  color:#fff;
  opacity:0.9;
}
.footer-col ul { list-style:none; }
.footer-col ul li { margin-bottom:10px; }
.footer-col ul a {
  text-decoration:none;
  color: rgba(255,255,255,0.6);
  font-size:0.9rem;
  transition: 0.2s;
}
.footer-col ul a:hover { color:#FFB703; padding-left:4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  margin-top:44px;
  padding-top:22px;
  text-align:center;
  font-size:0.85rem;
  opacity:0.5;
  letter-spacing:0.3px;
}

/* 工具类 */
.text-accent { color:#FF6B35; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.65; font-size:1.05rem; line-height:1.7; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* 装饰性波浪分隔 */
.section-wave {
  position:relative;
}
.section-wave::after {
  content:'';
  position:absolute;
  bottom:-2px;
  left:0;
  width:100%;
  height:40px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 60'%3E%3Cpath fill='%23FFFAF5' d='M0,40 C360,80 720,0 1440,40 L1440,60 L0,60 Z'/%3E%3C/svg%3E") no-repeat bottom;
  background-size: cover;
  pointer-events:none;
}

/* 额外装饰点缀 */
.deco-dots {
  position:absolute;
  width:120px;
  height:120px;
  background-image: radial-gradient(circle, #FF6B35 2px, transparent 2px);
  background-size: 12px 12px;
  opacity:0.08;
  pointer-events:none;
  z-index:0;
}

/* ⚠️ 响应式 */
@media (max-width: 992px) {
  .hero h1 { font-size:2.8rem; }
  .section-title { font-size:2rem; }
  .stats-bar { grid-template-columns:repeat(2,1fr); gap:16px; }
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
  .feature-block { gap:40px; }
}

@media (max-width: 768px) {
  .feature-block { grid-template-columns:1fr; gap:40px; }
  .feature-block:nth-child(even) .feature-image { order:0; }
  .feature-block:nth-child(even) .feature-text { order:0; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .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:72px;
    left:0;
    width:100%;
    background: rgba(255,250,245,0.98);
    backdrop-filter:blur(16px);
    padding:24px 28px;
    gap:18px;
    border-bottom: 2px solid rgba(255,107,53,0.08);
    box-shadow: 0 20px 48px rgba(0,0,0,0.06);
  }
  .main-nav.open a { font-size:1rem; padding:6px 0; }
  .hero { min-height:70vh; padding:80px 0 40px; }
  .hero h1 { font-size:2.2rem; }
  .hero p { font-size:1rem; }
  .hero-content { max-width:100%; }
  .cta-banner { padding:40px 24px; }
  .cta-banner h2 { font-size:1.7rem; }
  .section-title { font-size:1.7rem; }
}

@media (max-width: 480px) {
  .cards-grid, .content-wall, .stats-bar { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; gap:24px; }
  .hero-buttons { flex-direction:column; }
  .hero h1 { font-size:1.9rem; }
  .btn { padding:12px 24px; font-size:0.9rem; width:100%; justify-content:center; }
  .section { padding:56px 0; }
  .stat-number { font-size:2rem; }
  .stat-item { padding:24px 16px; }
  .category-card { padding:24px 20px; }
  .content-wall-body { padding:18px 16px 20px; }
  .cta-banner h2 { font-size:1.4rem; }
  .section-title { font-size:1.5rem; }
  .hero-eyebrow { font-size:0.7rem; padding:4px 14px; }
}

/* 平滑滚动 */
html { scroll-behavior: smooth; }

/* 选中样式 */
::selection {
  background: rgba(255,107,53,0.2);
  color:#2D3E50;
}

/* 滚动条 */
::-webkit-scrollbar { width:8px; }
::-webkit-scrollbar-track { background:#FFFAF5; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #FF6B35, #FFB703);
  border-radius:8px;
}
::-webkit-scrollbar-thumb:hover { background:#E85D75; }