/* ============================================
   在线赌场 - 拉斯维加斯霓虹风格主样式表
   CSS前缀规范: cas-
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700;800;900&family=Noto+Sans+SC:wght@400;500;700;900&display=swap');

/* --- CSS变量 --- */
:root {
  --cas-primary: #0F0F23;
  --cas-secondary: #FF1493;
  --cas-accent: #FFD700;
  --cas-text: #F0E6FF;
  --cas-link: #FF1493;
  --cas-dark: #080816;
  --cas-card-bg: rgba(15, 15, 35, 0.85);
  --cas-border: rgba(255, 20, 147, 0.3);
  --cas-glow-pink: 0 0 15px rgba(255, 20, 147, 0.5);
  --cas-glow-gold: 0 0 15px rgba(255, 215, 0, 0.5);
  --cas-font-cn: 'Noto Sans SC', sans-serif;
  --cas-font-en: 'Montserrat', sans-serif;
  --cas-radius: 8px;
  --cas-transition: all 0.3s ease;
}

/* --- 干扰码隐藏 --- */
.vegas-jammer-block {
  display: none;
  visibility: hidden;
  width: 0;
  height: 0;
  font-size: 0;
  line-height: 0;
  position: absolute;
  left: -9999px;
}

/* --- 全局重置 --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--cas-font-cn);
  background-color: var(--cas-dark);
  color: var(--cas-text);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--cas-link);
  text-decoration: none;
  transition: var(--cas-transition);
}

a:hover {
  color: var(--cas-accent);
  text-shadow: var(--cas-glow-pink);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--cas-font-en);
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
}

h1 { font-size: 2.8rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p { margin-bottom: 1rem; font-size: 1rem; }

/* --- 容器 --- */
.cas-container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --- 导航栏 --- */
.cas-header {
  background: rgba(15, 15, 35, 0.92);
  backdrop-filter: blur(10px);
  padding: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--cas-border);
  position: relative;
}

.cas-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1440px;
  margin: 0 auto;
}

.cas-logo {
  font-family: var(--cas-font-en);
  font-size: 1.6rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--cas-accent), var(--cas-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1px;
  white-space: nowrap;
}

.cas-nav-links {
  display: flex;
  list-style: none;
  gap: 6px;
  align-items: center;
}

.cas-nav-links li a {
  display: block;
  padding: 8px 14px;
  color: var(--cas-text);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--cas-radius);
  transition: var(--cas-transition);
  position: relative;
  white-space: nowrap;
}

.cas-nav-links li a:hover,
.cas-nav-links li a.cas-active {
  color: var(--cas-secondary);
  text-shadow: 0 0 10px rgba(255, 20, 147, 0.6);
  transform: translateY(-2px);
}

.cas-nav-links li a.cas-active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 2px;
  background: var(--cas-secondary);
  box-shadow: 0 0 8px var(--cas-secondary);
  border-radius: 2px;
}

/* --- 汉堡菜单 --- */
.cas-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  z-index: 1100;
}

.cas-hamburger span {
  display: block;
  width: 28px;
  height: 3px;
  background: var(--cas-secondary);
  border-radius: 3px;
  transition: var(--cas-transition);
  box-shadow: 0 0 6px rgba(255, 20, 147, 0.5);
}

.cas-hamburger.cas-open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

.cas-hamburger.cas-open span:nth-child(2) { opacity: 0; }

.cas-hamburger.cas-open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

/* --- 侧边菜单 --- */
.cas-mobile-menu {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100vh;
  background: rgba(8, 8, 22, 0.98);
  backdrop-filter: blur(20px);
  z-index: 1050;
  transition: right 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  padding: 80px 30px 30px;
  border-left: 1px solid var(--cas-border);
  overflow-y: auto;
}

.cas-mobile-menu.cas-open { right: 0; }

.cas-mobile-menu ul { list-style: none; }

.cas-mobile-menu ul li { margin-bottom: 8px; }

.cas-mobile-menu ul li a {
  display: block;
  padding: 14px 16px;
  color: var(--cas-text);
  font-size: 1.05rem;
  border-radius: var(--cas-radius);
  transition: var(--cas-transition);
  border-left: 3px solid transparent;
}

.cas-mobile-menu ul li a:hover,
.cas-mobile-menu ul li a.cas-active {
  color: var(--cas-secondary);
  background: rgba(255, 20, 147, 0.08);
  border-left-color: var(--cas-secondary);
}

.cas-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1040;
}

.cas-overlay.cas-open { display: block; }

/* --- 英雄区域 --- */
.cas-hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(135deg, #0a0a1a 0%, #1a0a2e 30%, #0F0F23 60%, #0a1628 100%);
}

.cas-hero-bg {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
}

.cas-hero-bg::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: radial-gradient(ellipse at 20% 50%, rgba(255, 20, 147, 0.15) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 50%, rgba(255, 215, 0, 0.1) 0%, transparent 50%),
              radial-gradient(ellipse at 50% 0%, rgba(100, 50, 200, 0.2) 0%, transparent 60%);
  z-index: 1;
  animation: cas-hero-glow 8s ease-in-out infinite alternate;
}

@keyframes cas-hero-glow {
  0% { opacity: 0.7; }
  100% { opacity: 1; }
}

.cas-hero-particles {
  position: absolute;
  width: 100%; height: 100%;
  z-index: 1;
  overflow: hidden;
}

.cas-particle {
  position: absolute;
  width: 4px; height: 4px;
  background: var(--cas-accent);
  border-radius: 50%;
  animation: cas-float 6s ease-in-out infinite;
  opacity: 0.6;
}

.cas-particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; animation-duration: 8s; }
.cas-particle:nth-child(2) { left: 30%; top: 60%; animation-delay: 1s; animation-duration: 6s; }
.cas-particle:nth-child(3) { left: 50%; top: 30%; animation-delay: 2s; animation-duration: 7s; }
.cas-particle:nth-child(4) { left: 70%; top: 70%; animation-delay: 0.5s; animation-duration: 9s; }
.cas-particle:nth-child(5) { left: 90%; top: 40%; animation-delay: 1.5s; animation-duration: 5s; }
.cas-particle:nth-child(6) { left: 20%; top: 80%; animation-delay: 3s; animation-duration: 7s; }
.cas-particle:nth-child(7) { left: 60%; top: 10%; animation-delay: 2.5s; animation-duration: 8s; }
.cas-particle:nth-child(8) { left: 80%; top: 50%; animation-delay: 0.8s; animation-duration: 6s; }

@keyframes cas-float {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.4; }
  50% { transform: translateY(-30px) scale(1.5); opacity: 0.8; }
}

.cas-hero-content {
  position: relative;
  z-index: 2;
  padding: 40px 20px;
  max-width: 800px;
}

.cas-hero-content h1 {
  font-size: 3.5rem;
  font-weight: 900;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff, var(--cas-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.cas-hero-content p {
  font-size: 1.2rem;
  color: rgba(240, 230, 255, 0.85);
  margin-bottom: 35px;
  line-height: 1.9;
}

/* --- 按钮 --- */
.cas-btn-primary {
  display: inline-block;
  padding: 16px 40px;
  background: linear-gradient(135deg, var(--cas-secondary), #e0118a);
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: var(--cas-transition);
  letter-spacing: 1px;
  box-shadow: 0 4px 20px rgba(255, 20, 147, 0.4);
  position: relative;
  overflow: hidden;
}

.cas-btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.cas-btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 30px rgba(255, 20, 147, 0.6);
  color: #fff;
}

.cas-btn-primary:hover::before { left: 100%; }

.cas-btn-gold {
  display: inline-block;
  padding: 14px 36px;
  background: linear-gradient(135deg, var(--cas-accent), #e6b800);
  color: var(--cas-primary);
  font-size: 1rem;
  font-weight: 700;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: var(--cas-transition);
  box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
}

.cas-btn-gold:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 30px rgba(255, 215, 0, 0.5);
  color: var(--cas-primary);
}

.cas-btn-outline {
  display: inline-block;
  padding: 12px 32px;
  background: transparent;
  color: var(--cas-secondary);
  font-size: 1rem;
  font-weight: 600;
  border-radius: 50px;
  border: 2px solid var(--cas-secondary);
  cursor: pointer;
  transition: var(--cas-transition);
}

.cas-btn-outline:hover {
  background: var(--cas-secondary);
  color: #fff;
  box-shadow: var(--cas-glow-pink);
}

/* --- 区块标题 --- */
.cas-section-title {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 15px;
  position: relative;
  display: inline-block;
}

.cas-section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--cas-secondary), var(--cas-accent));
  margin: 12px auto 0;
  border-radius: 3px;
}

.cas-section-subtitle {
  text-align: center;
  color: rgba(240, 230, 255, 0.7);
  font-size: 1.05rem;
  margin-bottom: 50px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.cas-section { padding: 80px 0; }

.cas-section-header { text-align: center; margin-bottom: 50px; }

/* --- 游戏分类导航 --- */
.cas-game-categories {
  background: var(--cas-primary);
  padding: 60px 0;
}

.cas-category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.cas-category-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--cas-border);
  border-radius: 16px;
  padding: 35px 20px;
  text-align: center;
  transition: var(--cas-transition);
  cursor: pointer;
}

.cas-category-card:hover {
  transform: translateY(-8px);
  border-color: var(--cas-secondary);
  box-shadow: 0 10px 40px rgba(255, 20, 147, 0.2);
  background: rgba(255, 20, 147, 0.05);
}

.cas-category-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  display: block;
  filter: drop-shadow(0 0 10px rgba(255, 215, 0, 0.5));
}

.cas-category-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.cas-category-card p { font-size: 0.85rem; color: rgba(240, 230, 255, 0.6); margin-bottom: 0; }

/* --- 游戏卡片 --- */
.cas-game-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.cas-game-card {
  background: var(--cas-card-bg);
  border: 1px solid var(--cas-border);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--cas-transition);
}

.cas-game-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 50px rgba(255, 20, 147, 0.25);
  border-color: var(--cas-secondary);
}

.cas-game-card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: var(--cas-transition);
}

.cas-game-card:hover .cas-game-card-img { transform: scale(1.05); }

.cas-game-card-body { padding: 20px; }
.cas-game-card-body h3 { font-size: 1.2rem; margin-bottom: 8px; }
.cas-game-card-body p { font-size: 0.9rem; color: rgba(240, 230, 255, 0.7); margin-bottom: 15px; }

.cas-game-badge {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(255, 20, 147, 0.15);
  color: var(--cas-secondary);
  font-size: 0.75rem;
  border-radius: 20px;
  font-weight: 600;
}

/* --- 大奖榜单 --- */
.cas-jackpot-section {
  background: linear-gradient(180deg, var(--cas-dark) 0%, var(--cas-primary) 100%);
  padding: 60px 0;
  overflow: hidden;
}

.cas-jackpot-ticker {
  display: flex;
  gap: 20px;
  animation: cas-scroll 20s linear infinite;
}

@keyframes cas-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.cas-jackpot-item {
  flex-shrink: 0;
  background: rgba(255, 215, 0, 0.05);
  border: 1px solid rgba(255, 215, 0, 0.2);
  border-radius: 12px;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 320px;
}

.cas-jackpot-avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cas-secondary), var(--cas-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
  flex-shrink: 0;
}

.cas-jackpot-info h4 { font-size: 0.95rem; margin-bottom: 2px; }
.cas-jackpot-info p { font-size: 0.8rem; color: rgba(240, 230, 255, 0.6); margin-bottom: 0; }

.cas-jackpot-amount {
  color: var(--cas-accent);
  font-family: var(--cas-font-en);
  font-weight: 800;
  font-size: 1.3rem;
  text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
  margin-left: auto;
  white-space: nowrap;
}

/* --- 品牌优势 --- */
.cas-advantages { padding: 80px 0; background: var(--cas-primary); }

.cas-advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.cas-advantage-item {
  text-align: center;
  padding: 40px 20px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  transition: var(--cas-transition);
}

.cas-advantage-item:hover {
  border-color: var(--cas-accent);
  box-shadow: 0 0 30px rgba(255, 215, 0, 0.1);
}

.cas-advantage-icon { font-size: 3rem; margin-bottom: 20px; display: block; }
.cas-advantage-item h3 { font-size: 1.15rem; margin-bottom: 10px; color: var(--cas-accent); }
.cas-advantage-item p { font-size: 0.9rem; color: rgba(240, 230, 255, 0.65); margin-bottom: 0; }

/* --- VIP横幅 --- */
.cas-vip-banner {
  position: relative;
  padding: 80px 0;
  background: linear-gradient(135deg, #0a0a1a 0%, #1a0a10 50%, #0a0a1a 100%);
  overflow: hidden;
}

.cas-vip-banner::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: radial-gradient(ellipse at center, rgba(255, 215, 0, 0.08) 0%, transparent 70%);
}

.cas-vip-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cas-vip-content h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--cas-accent), #fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cas-vip-content p { font-size: 1.1rem; color: rgba(240, 230, 255, 0.8); margin-bottom: 30px; }

/* --- 优惠活动 --- */
.cas-promotions { padding: 80px 0; background: var(--cas-dark); }

.cas-promo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.cas-promo-card {
  background: var(--cas-card-bg);
  border: 1px solid var(--cas-border);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--cas-transition);
}

.cas-promo-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 40px rgba(255, 20, 147, 0.2);
}

.cas-promo-card-img { width: 100%; height: 180px; object-fit: cover; }

.cas-promo-card-body { padding: 22px; }
.cas-promo-card-body h3 { font-size: 1.15rem; margin-bottom: 10px; color: var(--cas-accent); }
.cas-promo-card-body p { font-size: 0.9rem; color: rgba(240, 230, 255, 0.7); }

.cas-promo-tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(255, 215, 0, 0.15);
  color: var(--cas-accent);
  font-size: 0.7rem;
  border-radius: 4px;
  font-weight: 600;
  margin-bottom: 10px;
}

/* --- APP推广 --- */
.cas-app-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--cas-primary) 0%, #1a0a2e 100%);
}

.cas-app-wrapper {
  display: flex;
  align-items: center;
  gap: 60px;
}

.cas-app-info { flex: 1; }
.cas-app-info h2 { font-size: 2.2rem; margin-bottom: 20px; }
.cas-app-info p { font-size: 1.05rem; color: rgba(240, 230, 255, 0.8); margin-bottom: 30px; }

.cas-app-buttons { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 30px; }

.cas-app-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.cas-app-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--cas-radius);
}

.cas-app-feature-icon { font-size: 1.5rem; }
.cas-app-feature span { font-size: 0.9rem; }

.cas-app-preview {
  flex: 1;
  display: flex;
  justify-content: center;
}

.cas-app-preview img {
  max-width: 350px;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(255, 20, 147, 0.3);
}

/* --- 合作伙伴 --- */
.cas-partners {
  padding: 60px 0;
  background: var(--cas-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.cas-partner-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
  opacity: 0.7;
}

.cas-partner-logos img {
  height: 40px;
  filter: grayscale(100%) brightness(2);
  transition: var(--cas-transition);
}

.cas-partner-logos img:hover {
  filter: grayscale(0%) brightness(1);
  opacity: 1;
}

.cas-cert-badge {
  text-align: center;
  margin-top: 30px;
  padding: 20px;
  border: 1px solid rgba(255, 215, 0, 0.2);
  border-radius: 12px;
  background: rgba(255, 215, 0, 0.03);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cas-cert-badge p {
  color: var(--cas-accent);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* --- 页脚 --- */
.cas-footer {
  background: #050510;
  padding: 60px 0 0;
  border-top: 1px solid var(--cas-border);
}

.cas-footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  padding-bottom: 40px;
}

.cas-footer-col h4 {
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: var(--cas-accent);
  position: relative;
  padding-bottom: 10px;
}

.cas-footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 40px; height: 2px;
  background: var(--cas-secondary);
}

.cas-footer-col p {
  font-size: 0.9rem;
  color: rgba(240, 230, 255, 0.6);
  line-height: 1.8;
}

.cas-footer-col ul {
  list-style: none;
}

.cas-footer-col ul li { margin-bottom: 10px; }

.cas-footer-col ul li a {
  color: rgba(240, 230, 255, 0.6);
  font-size: 0.9rem;
  transition: var(--cas-transition);
}

.cas-footer-col ul li a:hover {
  color: var(--cas-secondary);
  padding-left: 5px;
}

.cas-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 20px 0;
  text-align: center;
}

.cas-footer-bottom p {
  font-size: 0.8rem;
  color: rgba(240, 230, 255, 0.4);
  margin-bottom: 8px;
}

.cas-footer-bottom a {
  color: rgba(240, 230, 255, 0.5);
  font-size: 0.8rem;
  margin: 0 8px;
}

.cas-footer-bottom a:hover { color: var(--cas-secondary); }

.cas-footer-cert {
  margin-top: 12px;
  font-size: 0.75rem;
  color: rgba(255, 215, 0, 0.6);
}

/* --- 内页英雄 --- */
.cas-page-hero {
  padding: 120px 0 60px;
  text-align: center;
  background: linear-gradient(135deg, #0a0a1a 0%, var(--cas-primary) 50%, #1a0a2e 100%);
  position: relative;
  overflow: hidden;
}

.cas-page-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: radial-gradient(ellipse at 50% 50%, rgba(255, 20, 147, 0.1) 0%, transparent 60%);
}

.cas-page-hero h1 {
  position: relative;
  z-index: 2;
  font-size: 2.8rem;
  margin-bottom: 16px;
}

.cas-page-hero p {
  position: relative;
  z-index: 2;
  font-size: 1.1rem;
  color: rgba(240, 230, 255, 0.75);
  max-width: 650px;
  margin: 0 auto;
}

/* --- 内容区域 --- */
.cas-content-section {
  padding: 60px 0;
  background: var(--cas-dark);
}

.cas-content-wrapper {
  max-width: 900px;
  margin: 0 auto;
}

.cas-content-wrapper h2 {
  font-size: 1.8rem;
  margin: 40px 0 16px;
  color: var(--cas-accent);
}

.cas-content-wrapper h3 {
  font-size: 1.4rem;
  margin: 30px 0 12px;
  color: #fff;
}

.cas-content-wrapper p {
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(240, 230, 255, 0.85);
  margin-bottom: 18px;
}

.cas-content-img {
  width: 100%;
  border-radius: 12px;
  margin: 24px 0;
  border: 1px solid var(--cas-border);
}

/* --- VIP贵宾厅 --- */
.cas-vip-page { background: #050510; }

.cas-vip-hero {
  padding: 120px 0 60px;
  text-align: center;
  background: linear-gradient(135deg, #0a0a0a 0%, #1a0f00 50%, #0a0a0a 100%);
  position: relative;
}

.cas-vip-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: radial-gradient(ellipse at 50% 50%, rgba(255, 215, 0, 0.1) 0%, transparent 60%);
}

.cas-vip-hero h1 {
  position: relative;
  z-index: 2;
  background: linear-gradient(135deg, var(--cas-accent), #fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cas-vip-progress {
  max-width: 600px;
  margin: 30px auto 0;
  position: relative;
  z-index: 2;
}

.cas-vip-progress-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--cas-accent);
}

.cas-vip-progress-bar {
  width: 100%;
  height: 12px;
  background: rgba(255, 215, 0, 0.1);
  border-radius: 6px;
  overflow: hidden;
}

.cas-vip-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--cas-accent), #ff8c00);
  border-radius: 6px;
  width: 65%;
  transition: width 1s ease;
  box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.cas-vip-tiers {
  padding: 80px 0;
}

.cas-vip-tier-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.cas-vip-tier-card {
  background: rgba(255, 215, 0, 0.03);
  border: 1px solid rgba(255, 215, 0, 0.15);
  border-radius: 16px;
  padding: 30px;
  transition: var(--cas-transition);
  position: relative;
  overflow: hidden;
}

.cas-vip-tier-card:hover {
  transform: translateY(-5px);
  border-color: var(--cas-accent);
  box-shadow: 0 10px 40px rgba(255, 215, 0, 0.15);
}

.cas-vip-tier-card.cas-tier-premium {
  border-color: var(--cas-accent);
  background: rgba(255, 215, 0, 0.06);
}

.cas-vip-tier-level {
  font-family: var(--cas-font-en);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--cas-accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.cas-vip-tier-card h3 {
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.cas-vip-tier-perks { list-style: none; }

.cas-vip-tier-perks li {
  padding: 8px 0;
  font-size: 0.9rem;
  color: rgba(240, 230, 255, 0.75);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  display: flex;
  align-items: center;
  gap: 8px;
}

.cas-vip-tier-perks li::before {
  content: '\2726';
  color: var(--cas-accent);
  font-size: 0.8rem;
}

/* --- APP下载页 --- */
.cas-download-hero {
  padding: 120px 0 80px;
  background: linear-gradient(135deg, #0a0a1a 0%, #1a0a2e 50%, #0F0F23 100%);
  position: relative;
  overflow: hidden;
}

.cas-download-wrapper {
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 2;
}

.cas-download-info { flex: 1; }
.cas-download-info h1 { font-size: 2.6rem; margin-bottom: 20px; }
.cas-download-info p { font-size: 1.1rem; color: rgba(240, 230, 255, 0.8); margin-bottom: 30px; }

.cas-download-buttons { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 30px; }

.cas-qr-section {
  text-align: center;
  padding: 20px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 16px;
  border: 1px solid var(--cas-border);
  max-width: 200px;
}

.cas-qr-code {
  width: 150px;
  height: 150px;
  background: #fff;
  border-radius: 8px;
  margin: 0 auto 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cas-download-preview { flex: 1; text-align: center; }

.cas-download-preview img {
  max-width: 400px;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(255, 20, 147, 0.3);
}

.cas-download-features {
  padding: 80px 0;
  background: var(--cas-primary);
}

.cas-download-feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.cas-download-feature-item {
  text-align: center;
  padding: 30px 20px;
}

.cas-download-feature-item .cas-feature-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  display: block;
}

.cas-download-feature-item h3 { font-size: 1.1rem; margin-bottom: 10px; }
.cas-download-feature-item p { font-size: 0.85rem; color: rgba(240, 230, 255, 0.65); margin-bottom: 0; }

/* --- 优惠活动页 --- */
.cas-promo-page-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.cas-promo-page-card {
  background: var(--cas-card-bg);
  border: 1px solid var(--cas-border);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--cas-transition);
}

.cas-promo-page-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 40px rgba(255, 20, 147, 0.2);
}

.cas-promo-page-card-img { width: 100%; height: 200px; object-fit: cover; }

.cas-promo-page-card-body { padding: 24px; }
.cas-promo-page-card-body h3 { font-size: 1.3rem; margin-bottom: 12px; color: var(--cas-accent); }
.cas-promo-page-card-body p { font-size: 0.95rem; color: rgba(240, 230, 255, 0.75); }

.cas-promo-terms {
  margin-top: 16px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 8px;
  font-size: 0.8rem;
  color: rgba(240, 230, 255, 0.5);
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
  .cas-category-grid { grid-template-columns: repeat(2, 1fr); }
  .cas-game-grid { grid-template-columns: repeat(2, 1fr); }
  .cas-advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .cas-footer-grid { grid-template-columns: repeat(2, 1fr); }
  .cas-promo-grid { grid-template-columns: repeat(2, 1fr); }
  .cas-download-feature-grid { grid-template-columns: repeat(2, 1fr); }
  .cas-vip-tier-grid { grid-template-columns: repeat(2, 1fr); }
  .cas-promo-page-grid { grid-template-columns: 1fr; }
  h1 { font-size: 2.2rem; }
  .cas-hero-content h1 { font-size: 2.8rem; }
}

@media (max-width: 768px) {
  .cas-nav-links { display: none; }
  .cas-hamburger { display: flex; }
  .cas-hero-content h1 { font-size: 2.2rem; }
  .cas-hero-content p { font-size: 1rem; }
  .cas-section { padding: 50px 0; }
  .cas-section-title { font-size: 1.8rem; }
  .cas-category-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .cas-game-grid { grid-template-columns: 1fr; }
  .cas-advantage-grid { grid-template-columns: 1fr; }
  .cas-footer-grid { grid-template-columns: 1fr; }
  .cas-promo-grid { grid-template-columns: 1fr; }
  .cas-app-wrapper { flex-direction: column; }
  .cas-download-wrapper { flex-direction: column; text-align: center; }
  .cas-download-buttons { justify-content: center; }
  .cas-download-feature-grid { grid-template-columns: repeat(2, 1fr); }
  .cas-page-hero { padding: 80px 0 40px; }
  .cas-page-hero h1 { font-size: 2rem; }
  .cas-vip-hero { padding: 80px 0 40px; }
  .cas-download-hero { padding: 80px 0 60px; }
}

@media (max-width: 360px) {
  html { font-size: 14px; }
  .cas-hero-content h1 { font-size: 1.8rem; }
  .cas-category-grid { grid-template-columns: 1fr; }
  .cas-download-feature-grid { grid-template-columns: 1fr; }
  .cas-btn-primary { padding: 12px 28px; font-size: 0.95rem; }
  .cas-app-features { grid-template-columns: 1fr; }
}

/* --- 霓虹呼吸灯动画 --- */
@keyframes cas-neon-breathe {
  0%, 100% { box-shadow: 0 0 5px var(--cas-secondary), 0 0 10px rgba(255, 20, 147, 0.3); }
  50% { box-shadow: 0 0 15px var(--cas-secondary), 0 0 30px rgba(255, 20, 147, 0.5); }
}

.cas-neon-glow {
  animation: cas-neon-breathe 3s ease-in-out infinite;
}

/* --- 淡入动画 --- */
@keyframes cas-fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.cas-animate {
  opacity: 0;
  animation: cas-fadeInUp 0.6s ease forwards;
}

.cas-animate-delay-1 { animation-delay: 0.1s; }
.cas-animate-delay-2 { animation-delay: 0.2s; }
.cas-animate-delay-3 { animation-delay: 0.3s; }
.cas-animate-delay-4 { animation-delay: 0.4s; }