/* ===========================================================
   BTT918E.CN | 博天堂918 · 至尊娱乐巅峰
   Design System: 新中式奢华杂志风
   (翡翠绿 · 香槟金 · 米白底)
   =========================================================== */

/* --------------------------------------------------------- */
/* 1. 设计令牌与全局重置
/* --------------------------------------------------------- */
:root {
  --color-jade: #1B4332;
  --color-jade-dark: #0F2A1E;
  --color-jade-light: #2D6A4F;
  --color-gold: #D4AF37;
  --color-gold-light: #F4E4C1;
  --color-gold-pale: #EDE0CC;
  --color-cream: #FDFBF7;
  --color-beige: #F5F0EB;
  --color-beige-dark: #E8E2D9;
  --color-white: #FFFFFF;
  --color-ink: #2D2A24;
  --color-ink-light: #5C5852;
  --color-ink-muted: #8A837B;

  --font-primary: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 4px 20px rgba(27, 67, 50, 0.06);
  --shadow-hover: 0 16px 48px rgba(27, 67, 50, 0.12);
  --transition-smooth: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--color-cream);
  color: var(--color-ink);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --------------------------------------------------------- */
/* 2. 核心布局
/* --------------------------------------------------------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
  position: relative;
}

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

/* --------------------------------------------------------- */
/* 3. 排版与标志性装饰
/* --------------------------------------------------------- */
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-jade);
  background: var(--color-gold-light);
  padding: 4px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-jade-dark);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  max-width: 600px;
  color: var(--color-ink-muted);
  font-size: 1.1rem;
  margin-bottom: 48px;
}

.text-accent {
  color: var(--color-gold);
}

.text-center {
  text-align: center;
}

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--color-ink-muted);
  font-size: 1.05rem;
}

/* --------------------------------------------------------- */
/* 4. 导航栏（玻璃态）
/* --------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(253, 251, 247, 0.88);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--color-gold-pale);
  transition: background var(--transition-smooth);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.4rem;
  text-decoration: none;
  color: var(--color-jade-dark);
  letter-spacing: 1px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-jade), var(--color-jade-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--color-gold);
  box-shadow: 0 4px 12px rgba(27, 67, 50, 0.2);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-ink);
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-smooth);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-gold);
  transition: all var(--transition-smooth);
  transform: translateX(-50%);
}

.main-nav a:hover {
  color: var(--color-jade);
}

.main-nav a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px !important;
  border-radius: var(--radius-sm) !important;
  background: linear-gradient(135deg, var(--color-jade), var(--color-jade-light));
  color: var(--color-white) !important;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(27, 67, 50, 0.25);
  transition: all var(--transition-smooth);
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(27, 67, 50, 0.35);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.8rem;
  color: var(--color-jade);
  cursor: pointer;
}

/* --------------------------------------------------------- */
/* 5. 英雄区域
/* --------------------------------------------------------- */
.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  margin-top: 72px;
  background: var(--color-cream);
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(27, 67, 50, 0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: var(--radius-lg);
  background: var(--color-jade);
  color: var(--color-gold);
  margin-bottom: 20px;
  border: 1px solid var(--color-gold);
}

.hero h1 {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-jade-dark);
  margin-bottom: 20px;
  letter-spacing: -1.5px;
}

.hero p {
  font-size: 1.2rem;
  color: var(--color-ink-light);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* --------------------------------------------------------- */
/* 6. 按钮系统
/* --------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--transition-smooth);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-jade), var(--color-jade-light));
  color: var(--color-white);
  box-shadow: 0 4px 16px rgba(27, 67, 50, 0.25);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(27, 67, 50, 0.35);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-gold);
  color: var(--color-jade);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--color-gold);
  color: var(--color-jade-dark);
  border-color: var(--color-gold);
  transform: translateY(-3px);
}

/* --------------------------------------------------------- */
/* 7. 卡片网格
/* --------------------------------------------------------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.category-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid var(--color-beige-dark);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-gold), var(--color-jade));
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition-smooth);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.category-card:hover::before {
  transform: scaleY(1);
}

.card-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold-pale));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
  color: var(--color-jade);
  transition: all var(--transition-smooth);
}

.category-card:hover .card-icon {
  background: linear-gradient(135deg, var(--color-jade), var(--color-jade-light));
  color: var(--color-gold);
  box-shadow: 0 4px 12px rgba(27, 67, 50, 0.2);
}

.card-link {
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--color-jade);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  transition: gap var(--transition-smooth);
}

.card-link:hover {
  gap: 12px;
}

/* --------------------------------------------------------- */
/* 8. 特性块
/* --------------------------------------------------------- */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
}

.feature-text {
  padding: 24px 0;
}

.feature-list {
  list-style: none;
  margin-top: 16px;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  color: var(--color-ink-light);
}

.feature-list li::before {
  content: '✦';
  font-weight: 700;
  color: var(--color-gold);
  font-size: 0.8rem;
}

/* --------------------------------------------------------- */
/* 9. 统计栏
/* --------------------------------------------------------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 32px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-beige-dark);
  background: var(--color-white);
  transition: all var(--transition-smooth);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--color-jade);
  line-height: 1;
  letter-spacing: -1px;
}

.stat-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-ink-muted);
  margin-top: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* --------------------------------------------------------- */
/* 10. 内容墙
/* --------------------------------------------------------- */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-beige-dark);
  background: var(--color-white);
  transition: all var(--transition-smooth);
}

.content-wall-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.content-wall-body {
  padding: 24px;
}

.content-wall-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-jade-dark);
  margin-bottom: 8px;
}

.content-wall-body p {
  color: var(--color-ink-muted);
  font-size: 0.95rem;
}

/* --------------------------------------------------------- */
/* 11. FAQ 手风琴
/* --------------------------------------------------------- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-beige-dark);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--color-white);
  transition: border-color var(--transition-smooth);
}

.faq-item.open {
  border-color: var(--color-gold);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-ink);
  transition: color var(--transition-smooth);
}

.faq-item.open .faq-question {
  color: var(--color-jade);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-gold);
  transition: transform var(--transition-smooth);
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  color: var(--color-ink-light);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeSlideIn 0.3s ease-out;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------- */
/* 12. CTA 横幅
/* --------------------------------------------------------- */
.cta-banner {
  padding: 64px 40px;
  text-align: center;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-jade-dark), var(--color-jade), var(--color-jade-light));
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 80%, rgba(212, 175, 55, 0.15), transparent 60%);
  pointer-events: none;
}

.cta-banner h2 {
  color: var(--color-white);
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 12px;
  position: relative;
}

.cta-banner p {
  opacity: 0.85;
  margin-bottom: 28px;
  font-size: 1.1rem;
  position: relative;
}

.cta-banner .btn-primary {
  background: var(--color-white);
  color: var(--color-jade-dark);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  position: relative;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
}

/* --------------------------------------------------------- */
/* 13. 页脚
/* --------------------------------------------------------- */
.site-footer {
  padding: 56px 0 24px;
  background: var(--color-jade-dark);
  color: var(--color-gold-pale);
}

.site-footer .container {
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand .logo {
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-brand .logo-icon {
  background: var(--color-gold);
  color: var(--color-jade-dark);
}

.footer-brand p {
  opacity: 0.7;
  font-size: 0.95rem;
  max-width: 320px;
  line-height: 1.7;
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

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

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

.footer-col ul li a {
  color: var(--color-gold-pale);
  text-decoration: none;
  opacity: 0.7;
  transition: opacity var(--transition-smooth);
  font-size: 0.9rem;
}

.footer-col ul li a:hover {
  opacity: 1;
  color: var(--color-gold);
}

.footer-bottom {
  border-top: 1px solid rgba(244, 228, 193, 0.15);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.6;
}

/* --------------------------------------------------------- */
/* 14. 工具类
/* --------------------------------------------------------- */
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* --------------------------------------------------------- */
/* 15. 响应式设计
/* --------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 3rem;
  }
  .section-title {
    font-size: 2.2rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background: var(--color-cream);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 2px solid var(--color-gold-pale);
    box-shadow: var(--shadow-hover);
  }

  .main-nav.open {
    display: flex;
  }

  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .hero {
    min-height: 70vh;
    margin-top: 64px;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .feature-text {
    order: -1;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero {
    min-height: 60vh;
  }

  .cta-banner {
    padding: 40px 24px;
  }

  .cta-banner h2 {
    font-size: 1.8rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------- */
/* 16. 精致动画与Awwwards点缀
/* --------------------------------------------------------- */
@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-8px);
  }
}

.hero-image {
  animation: float 6s ease-in-out infinite;
}

.category-card:nth-child(2) .card-icon {
  transition-delay: 0.05s;
}
.category-card:nth-child(3) .card-icon {
  transition-delay: 0.1s;
}
.category-card:nth-child(4) .card-icon {
  transition-delay: 0.15s;
}

/* 为统计数字添加细腻的闪烁光泽 */
.stat-item {
  position: relative;
  isolation: isolate;
}

.stat-item::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(212, 175, 55, 0.1),
    transparent
  );
  transition: left 0.5s;
}

.stat-item:hover::after {
  left: 100%;
}