/* ===== 开元棋牌 style.css ===== */
/* 全局重置与变量 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --primary: #f0c040;
  --primary-dark: #d4a830;
  --bg: #0f0f1a;
  --bg-card: rgba(255,255,255,0.05);
  --text: #e0e0e0;
  --text-light: #a0a0b0;
  --glass: rgba(255,255,255,0.08);
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --radius: 20px;
  --transition: 0.3s ease;
  --gradient-primary: linear-gradient(135deg, var(--primary), #ffd700);
}
body.dark {
  --bg: #0f0f1a;
  --bg-card: rgba(255,255,255,0.05);
  --text: #e0e0e0;
  --text-light: #a0a0b0;
}
body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
}
a {
  color: var(--primary);
  text-decoration: none;
}
img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
/* 头部导航 */
header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(15,15,26,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.logo {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo svg {
  width: 40px;
  height: 40px;
}
.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}
.nav-links a {
  color: var(--text);
  font-size: 0.95rem;
  transition: color var(--transition);
  position: relative;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}
.nav-actions {
  display: flex;
  gap: 16px;
  align-items: center;
}
.search-btn,
.dark-toggle,
.menu-toggle {
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 4px;
  transition: color var(--transition);
}
.search-btn:hover,
.dark-toggle:hover,
.menu-toggle:hover {
  color: var(--primary);
}
.menu-toggle {
  display: none;
}
.mobile-menu {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  background: rgba(15,15,26,0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 20px;
  z-index: 999;
}
.mobile-menu.open {
  display: block;
}
.mobile-menu a {
  display: block;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  color: var(--text);
}
/* 英雄区 */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #0f0f1a 100%);
  padding-top: 80px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg svg {
  width: 100%;
  height: 100%;
  opacity: 0.15;
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  padding: 40px 20px;
}
.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
}
.hero p {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 30px;
}
.hero .btn {
  display: inline-block;
  padding: 14px 40px;
  background: var(--primary);
  color: #0f0f1a;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.hero .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(240,192,64,0.3);
}
.hero-carousel {
  position: absolute;
  bottom: 40px;
  display: flex;
  gap: 12px;
  z-index: 1;
}
.hero-carousel span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  cursor: pointer;
  transition: background var(--transition);
}
.hero-carousel span.active {
  background: var(--primary);
}
/* 通用区块 */
section {
  padding: 100px 0;
}
.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  text-align: center;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-sub {
  text-align: center;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 60px;
  font-size: 1.05rem;
}
/* 网格布局 */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  align-items: center;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
/* 卡片 */
.card {
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 30px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  color: var(--primary);
}
.card h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}
.card p {
  color: var(--text-light);
  font-size: 0.95rem;
}
/* 品牌故事 */
.story-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.story-text p {
  margin-bottom: 16px;
}
/* 统计数字 */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--primary);
}
.stat-label {
  color: var(--text-light);
  margin-top: 4px;
}
/* 客户评价 */
.testimonial {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}
.testimonial p {
  font-style: italic;
  font-size: 1.1rem;
  margin-bottom: 16px;
}
.testimonial cite {
  color: var(--primary);
  font-weight: 600;
}
/* FAQ */
.faq-item {
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 16px 0;
  cursor: pointer;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  color: var(--text-light);
}
.faq-item.open .faq-answer {
  max-height: 200px;
  padding-top: 12px;
}
.faq-item .arrow {
  transition: transform 0.3s;
}
.faq-item.open .arrow {
  transform: rotate(180deg);
}
/* HowTo */
.howto-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 24px;
}
.howto-step .num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: #0f0f1a;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}
/* 联系表单 */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 18px;
  margin-bottom: 16px;
  background: var(--glass);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  color: var(--text);
  font-size: 1rem;
}
.contact-form button {
  padding: 14px 40px;
  background: var(--primary);
  color: #0f0f1a;
  border: none;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition);
}
.contact-form button:hover {
  transform: scale(1.02);
}
/* 页脚 */
.footer {
  background: rgba(0,0,0,0.4);
  padding: 60px 0 30px;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}
.footer h4 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  color: var(--primary);
}
.footer a {
  display: block;
  color: var(--text-light);
  margin-bottom: 8px;
  font-size: 0.9rem;
}
.footer a:hover {
  color: var(--primary);
}
.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.05);
  color: var(--text-light);
  font-size: 0.85rem;
}
/* 面包屑 */
.breadcrumb {
  padding: 100px 0 20px;
  font-size: 0.9rem;
  color: var(--text-light);
}
.breadcrumb a {
  color: var(--primary);
}
/* 搜索模态框 */
.search-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.8);
  z-index: 2000;
  justify-content: center;
  align-items: center;
}
.search-modal.open {
  display: flex;
}
.search-modal input {
  width: 80%;
  max-width: 500px;
  padding: 16px 24px;
  border-radius: 50px;
  border: none;
  font-size: 1.1rem;
  background: #fff;
  color: #0f0f1a;
}
.search-modal .close-btn {
  position: absolute;
  top: 20px;
  right: 30px;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
}
/* 返回顶部 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary);
  color: #0f0f1a;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--transition);
  z-index: 500;
}
.back-to-top.visible {
  opacity: 1;
}
/* 滚动动画 */
.card,
.stat-number,
.story-content,
.grid-2,
.grid-3,
.grid-4 {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
/* 响应式 */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .menu-toggle {
    display: block;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
  .grid-2,
  .grid-3,
  .grid-4,
  .story-content,
  .stats {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  section {
    padding: 60px 0;
  }
}