/*
 * OK365 VIP Website Styles
 * Casino Style: 光影建筑 (Architectural Light)
 * 核心理念: 现代主义建筑美学，利用光影、结构和空间感引导用户
 * 配色: 混凝土灰色调、纯白、深黑，通过光线照射形成明暗对比
 */

/* ===== 基础重置和变量 ===== */
:root {
  /* 光影建筑配色方案 */
  --primary-black: #000000;
  --primary-white: #ffffff;
  --concrete-gray: #606060;
  --light-concrete: #e8e8e8;
  --dark-concrete: #404040;
  --shadow-dark: #2a2a2a;
  --accent-light: #f5f5f5;
  --text-primary: #333333;
  --text-secondary: #666666;
  --border-light: #dddddd;

  /* 字体 */
  --font-primary: 'Archivo', 'Syne', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

  /* 间距 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;

  /* 圆角 */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;

  /* 阴影 - 模拟建筑光影效果 */
  --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.15);
  --shadow-heavy: 0 8px 32px rgba(0, 0, 0, 0.2);
  --shadow-architectural: 0 12px 48px rgba(0, 0, 0, 0.25);

  /* 过渡效果 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* 固定头部高度 */
  --header-height: 70px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--accent-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== 布局容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-md);
}

/* ===== 顶部导航 ===== */
.header {
  background: linear-gradient(135deg, var(--primary-black) 0%, var(--shadow-dark) 100%);
  box-shadow: var(--shadow-medium);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: var(--transition-normal);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  min-height: var(--header-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: var(--font-weight-bold);
  color: var(--primary-white);
  text-decoration: none;
  letter-spacing: -0.5px;
  transition: var(--transition-fast);
}

.logo:hover {
  opacity: 0.85;
}

.logo-image {
  height: 44px;
  width: auto;
  display: block;
}

.logo-text {
  font-size: 1.6rem;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: var(--spacing-md);
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none; /* hide Firefox scrollbar for horizontal overflow */
  -ms-overflow-style: none; /* hide scrollbar on IE/Edge */
}

.nav-menu::-webkit-scrollbar {
  display: none;
}

.nav-link {
  color: var(--primary-white);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  position: relative;
  transition: var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.nav-link.active {
  background-color: var(--concrete-gray);
}

.alert-banner {
  background: linear-gradient(135deg, #e74c3c, #c0392b);
  color: var(--primary-white);
  padding: var(--spacing-xs) 0;
  text-align: center;
  line-height: 1.4;
}

.alert-banner .container {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-xs) * 0.6);
}

.alert-banner p {
  margin: 0;
  font-size: 0.8rem;
}

.nav-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--primary-white);
  font-size: 1.25rem;
  cursor: pointer;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* ===== Hero区域 ===== */
.hero {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)),
              url('images/heroes/home-hero-beauty.jpg') center/cover;
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  color: var(--primary-white);
  text-align: center;
}

/* 不同页面的Hero背景 */
body[data-page="casino"] .hero,
.casino-truc-tuyen .hero {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)),
              url('images/heroes/casino-hero-beauty.jpg') center/cover;
}

body[data-page="games"] .hero,
.games .hero,
.game-no-hu .hero,
.game-ban-ca .hero {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)),
              url('images/heroes/games-hero-beauty.jpg') center/cover;
}

body[data-page="vip"] .hero,
.he-thong-vip .hero,
.khuyen-mai-uu-dai .hero {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)),
              url('images/heroes/vip-hero-beauty.jpg') center/cover;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-xxl) var(--spacing-md);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xl);
  opacity: 0.9;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.cta-button {
  background: linear-gradient(135deg, var(--concrete-gray) 0%, var(--dark-concrete) 100%);
  color: var(--primary-white);
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1.1rem;
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  display: inline-block;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-medium);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-heavy);
  background: linear-gradient(135deg, var(--dark-concrete) 0%, var(--concrete-gray) 100%);
}

/* ===== 主要内容区域 ===== */
.main-content {
  margin-top: 0;
  background-color: var(--primary-white);
}

.main-content > .hero:first-child {
  padding-top: calc(var(--header-height) + var(--spacing-xs));
  min-height: calc(100vh - var(--header-height));
}

.section {
  padding: var(--spacing-xxl) 0;
  position: relative;
}

.section:nth-child(even) {
  background-color: var(--accent-light);
}

.section-title {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--text-primary);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--concrete-gray), var(--dark-concrete));
}

.section-subtitle {
  font-size: 1.125rem;
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--text-secondary);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== 网格系统 ===== */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ===== 卡片组件 ===== */
.card {
  background: var(--primary-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-light);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--concrete-gray), var(--dark-concrete));
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-heavy);
}

.card-image {
  width: 100%;
  height: 200px;
  background-color: var(--light-concrete);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.card-title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.card-text {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.card-link {
  color: var(--concrete-gray);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: var(--transition-fast);
}

.card-link:hover {
  color: var(--dark-concrete);
  text-decoration: underline;
}

/* ===== VIP系统展示 ===== */
.vip-levels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

.vip-level {
  background: var(--primary-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-light);
  position: relative;
  transition: var(--transition-normal);
}

.vip-level::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--concrete-gray);
}

.vip-level.bronze::before { background: #CD7F32; }
.vip-level.silver::before { background: #C0C0C0; }
.vip-level.gold::before { background: #FFD700; }
.vip-level.platinum::before { background: #E5E4E2; }
.vip-level.diamond::before { background: #B9F2FF; }
.vip-level.black-diamond::before { background: var(--primary-black); }

.vip-level:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
}

.vip-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
}

.vip-name {
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.vip-range {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ===== 表格样式 ===== */
.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--primary-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-light);
  margin: var(--spacing-lg) 0;
}

.table th,
.table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.table th {
  background-color: var(--concrete-gray);
  color: var(--primary-white);
  font-weight: var(--font-weight-bold);
}

.table tr:hover {
  background-color: var(--accent-light);
}

/* ===== 表单样式 ===== */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.form-input {
  width: 100%;
  padding: var(--spacing-sm);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: var(--transition-fast);
  background-color: var(--primary-white);
}

.form-input:focus {
  outline: none;
  border-color: var(--concrete-gray);
  box-shadow: 0 0 0 3px rgba(96, 96, 96, 0.1);
}

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--concrete-gray);
  color: var(--primary-white);
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  text-align: center;
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: 1rem;
}

.btn:hover {
  background-color: var(--dark-concrete);
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--concrete-gray), var(--dark-concrete));
}

.btn-secondary {
  background-color: var(--light-concrete);
  color: var(--text-primary);
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.1rem;
}

/* ===== 底部 ===== */
.footer {
  background: linear-gradient(135deg, var(--primary-black) 0%, var(--shadow-dark) 100%);
  color: var(--primary-white);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  color: var(--primary-white);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-section ul li a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-section ul li a:hover {
  color: var(--primary-white);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary-black);
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-medium);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .logo-image {
    height: 36px;
  }

  .logo-text {
    font-size: 1.3rem;
  }

  .nav-link {
    width: 100%;
    text-align: left;
    padding: var(--spacing-sm);
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  .grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }

  .vip-levels {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }

  .table {
    font-size: 0.9rem;
  }

  .table th,
  .table td {
    padding: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-content {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .section {
    padding: var(--spacing-lg) 0;
  }

  .card {
    padding: var(--spacing-md);
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ===== 特殊效果 ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.highlight {
  background: linear-gradient(120deg, transparent 0%, rgba(96, 96, 96, 0.1) 50%, transparent 100%);
  background-size: 200% 100%;
  background-position: 200% 0;
  animation: highlight 2s ease-in-out;
}

@keyframes highlight {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===== 加载动画 ===== */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(96, 96, 96, 0.3);
  border-radius: 50%;
  border-top-color: var(--concrete-gray);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== 可访问性 ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== 打印样式 ===== */
@media print {
  .header,
  .footer,
  .nav-toggle,
  .cta-button {
    display: none;
  }

  .main-content {
    margin-top: 0;
  }

  .section {
    break-inside: avoid;
  }
}