/* ============================================
  云鼎娱乐平台 — 云鼎娱乐官网
  风格：珊瑚蜜桃 · 暖阳渐变
  设计师：Awwwards 获奖设计师
  域名：ydyypt.cn
============================================ */

/* ----- 基础重置 & 变量 ----- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 主色系 — 珊瑚蜜桃 */
  --primary: #FF6B6B;
  --primary-light: #FF8E8E;
  --primary-dark: #E55A5A;
  --secondary: #FFB088;
  --secondary-light: #FFD4B8;
  --secondary-dark: #F09A6E;

  /* 点缀色 */
  --gold: #D4A853;
  --gold-light: #E8C87A;
  --gold-dark: #B88D3E;
  --teal: #2EC4B6;
  --teal-light: #5FD9CD;

  /* 中性色 */
  --bg: #FFF8F3;
  --bg-alt: #FFF0E8;
  --bg-card: rgba(255, 255, 255, 0.88);
  --text: #2D2D3A;
  --text-secondary: #6B6B7B;
  --text-light: #9A9AAB;
  --border: rgba(255, 107, 107, 0.12);
  --border-light: rgba(255, 107, 107, 0.06);
  --shadow: 0 8px 32px rgba(255, 107, 107, 0.12);
  --shadow-hover: 0 16px 48px rgba(255, 107, 107, 0.18);

  /* 排版 */
  --font-sans: system-ui, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  /* 过渡 */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --duration: 0.35s;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ----- 工具类 ----- */
.text-accent {
  color: var(--primary);
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ----- 容器 & 区块 ----- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--bg-alt);
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  max-width: 600px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--secondary-light), transparent);
  opacity: 0.5;
}

/* ----- 导航 — 固定顶部 ----- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 248, 243, 0.92);
  backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid var(--border-light);
  transition: background var(--duration) var(--ease-out);
}

.site-header.scrolled {
  background: rgba(255, 248, 243, 0.97);
  box-shadow: 0 4px 24px rgba(255, 107, 107, 0.06);
}

.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: 10px;
  font-weight: 800;
  font-size: 1.3rem;
  text-decoration: none;
  color: var(--text);
  letter-spacing: 0.5px;
  transition: opacity 0.2s;
}

.logo:hover {
  opacity: 0.85;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 4px 12px rgba(255, 107, 107, 0.25);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
  transition: color var(--duration) var(--ease-out);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
  transition: width var(--duration) var(--ease-out);
}

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

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

.nav-cta {
  padding: 10px 24px !important;
  border-radius: 50px !important;
  color: #fff !important;
  font-weight: 600 !important;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 4px 16px rgba(255, 107, 107, 0.3);
  transition: transform var(--duration) var(--ease-out), box-shadow var(--duration) var(--ease-out) !important;
}

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

.nav-cta:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 28px rgba(255, 107, 107, 0.35) !important;
  color: #fff !important;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--duration) var(--ease-out);
}

/* ----- Hero ----- */
.hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 72px;
  background: linear-gradient(170deg, var(--bg) 0%, var(--bg-alt) 50%, #FFF0E8 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 107, 107, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 176, 136, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  max-width: 680px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.1), rgba(255, 176, 136, 0.1));
  color: var(--primary);
  border: 1px solid rgba(255, 107, 107, 0.12);
}

.hero h1 {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--text) 40%, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 36px;
  line-height: 1.7;
}

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

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(255, 107, 107, 0.08);
  position: relative;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s var(--ease-out);
}

.hero-image:hover img {
  transform: scale(1.02);
}

/* ----- 按钮 ----- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--duration) var(--ease-out);
  font-family: var(--font-sans);
  letter-spacing: 0.3px;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 4px 20px rgba(255, 107, 107, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(255, 107, 107, 0.35);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--border);
  color: var(--text);
  backdrop-filter: blur(4px);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(255, 107, 107, 0.04);
  transform: translateY(-2px);
}

/* ----- 标签 & 标题 ----- */
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 14px;
  color: var(--primary);
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.08), rgba(255, 176, 136, 0.08));
  padding: 4px 16px;
  border-radius: 50px;
  border: 1px solid rgba(255, 107, 107, 0.08);
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
  letter-spacing: -0.3px;
  color: var(--text);
}

.section-desc {
  max-width: 600px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 48px;
  line-height: 1.7;
}

/* ----- 卡片网格 ----- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.category-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
  transition: all var(--duration) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--gold));
  opacity: 0;
  transition: opacity var(--duration) var(--ease-out);
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 107, 107, 0.15);
}

.category-card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.1), rgba(255, 176, 136, 0.1));
  color: var(--primary);
  transition: transform var(--duration) var(--ease-out);
}

.category-card:hover .card-icon {
  transform: scale(1.08);
}

.card-link {
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--duration) var(--ease-out);
}

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

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

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(255, 107, 107, 0.06);
  position: relative;
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  pointer-events: none;
}

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

.feature-text {
  padding: 8px 0;
}

.feature-list {
  list-style: none;
  margin-top: 20px;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
}

.feature-list li:last-child {
  border-bottom: none;
}

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

/* ----- 数据条 ----- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat-item {
  padding: 32px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
  transition: all var(--duration) var(--ease-out);
}

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

.stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 8px;
  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: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
  transition: all var(--duration) var(--ease-out);
}

.content-wall-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 107, 107, 0.12);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}

.content-wall-item:hover img {
  transform: scale(1.03);
}

.content-wall-body {
  padding: 24px 24px 28px;
}

.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.content-wall-body p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

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

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  transition: all var(--duration) var(--ease-out);
}

.faq-item:hover {
  border-color: rgba(255, 107, 107, 0.15);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text);
  user-select: none;
  transition: color var(--duration);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--primary);
  transition: transform var(--duration) var(--ease-out);
}

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

.faq-item .faq-answer {
  padding: 0 24px 18px;
  display: none;
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.95rem;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeSlideIn 0.4s var(--ease-out);
}

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

/* ----- CTA 横幅 ----- */
.cta-banner {
  padding: 64px 32px;
  text-align: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(255, 107, 107, 0.2);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  max-width: 520px;
  margin: 0 auto 32px;
  font-size: 1.05rem;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}

/* ----- 页脚 ----- */
.site-footer {
  padding: 64px 0 28px;
  background: linear-gradient(180deg, var(--bg), var(--bg-alt));
  border-top: 1px solid var(--border-light);
}

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

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-brand .logo {
  font-size: 1.2rem;
  margin-bottom: 4px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text);
  letter-spacing: 0.5px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul a {
  text-decoration: none;
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color var(--duration);
}

.footer-col ul a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* ----- 响应式 ----- */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 2.8rem;
  }
  .section-title {
    font-size: 2rem;
  }
  .footer-grid {
    gap: 32px;
  }
}

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

  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background: rgba(255, 248, 243, 0.98);
    backdrop-filter: blur(16px);
    padding: 24px 32px;
    flex-direction: column;
    gap: 20px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.04);
  }

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

  .menu-toggle {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: 100px 0 60px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .feature-block .feature-image {
    order: -1;
  }

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

  .stat-number {
    font-size: 2rem;
  }

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

  .section {
    padding: 64px 0;
  }

  .section-title {
    font-size: 1.7rem;
  }

  .cta-banner {
    padding: 48px 24px;
  }

  .cta-banner h2 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 0 16px;
  }

  .container {
    padding: 0 16px;
  }

  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero-buttons {
    flex-direction: column;
    gap: 12px;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .footer-bottom {
    font-size: 0.75rem;
  }
}

/* ----- 微交互 & 动画增强 ----- */
@media (prefers-reduced-motion: no-preference) {
  .category-card,
  .content-wall-item,
  .stat-item,
  .faq-item {
    transition: all var(--duration) var(--ease-out);
  }
}

/* ----- 滚动条美化 ----- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary-light), var(--secondary));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* ----- 选中样式 ----- */
::selection {
  background: rgba(255, 107, 107, 0.2);
  color: var(--text);
}