/* ============================================
   全站样式 - 独特深紫金配色方案
   ============================================ */
:root {
  --primary: #1a0a2e;
  --primary-light: #2d1b4e;
  --accent: #d4a017;
  --accent-light: #f0c040;
  --accent-glow: rgba(212, 160, 23, 0.3);
  --text: #e8e0f0;
  --text-muted: #a89bc0;
  --surface: #241540;
  --surface-alt: #1e1038;
  --border: #3a2860;
  --success: #2ecc71;
  --danger: #e74c3c;
  --info: #3498db;
  --white: #ffffff;
  --font-main: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-heading: 'Noto Serif SC', 'STSong', serif;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background: var(--primary);
  color: var(--text);
  line-height: 1.8;
  overflow-x: hidden;
  min-height: 100vh;
}

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

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

a:hover {
  color: var(--accent-light);
}

/* ============================================
   导航栏 - 非sticky
   ============================================ */
.site-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-bottom: 2px solid var(--accent);
  position: relative;
  z-index: 100;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 5%;
  max-width: 1400px;
  margin: 0 auto;
}

.site-logo img {
  height: 50px;
  width: auto;
}

.header-actions {
  display: flex;
  gap: 10px;
}

.btn-cta {
  display: inline-block;
  padding: 10px 28px;
  background: linear-gradient(135deg, var(--accent) 0%, #b8860b 100%);
  color: var(--primary);
  font-weight: 700;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-cta:hover {
  background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
  color: var(--primary);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: var(--primary);
}

.main-nav {
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.nav-list {
  display: flex;
  justify-content: center;
  list-style: none;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0;
  flex-wrap: wrap;
}

.nav-list li {
  position: relative;
}

.nav-list a {
  display: block;
  padding: 14px 22px;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  border-bottom: 3px solid transparent;
}

.nav-list a:hover,
.nav-list a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: rgba(212, 160, 23, 0.08);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--accent);
  font-size: 1.8rem;
  cursor: pointer;
  padding: 8px;
}

/* ============================================
   面包屑导航
   ============================================ */
.breadcrumb {
  padding: 12px 5%;
  max-width: 1400px;
  margin: 0 auto;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb span {
  margin: 0 8px;
  color: var(--border);
}

/* ============================================
   Hero区域
   ============================================ */
.hero-section {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(160deg, #0d0520 0%, #1a0a2e 40%, #2d1b4e 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(26,10,46,0.6) 0%, rgba(26,10,46,0.9) 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  padding: 60px 5%;
  max-width: 900px;
}

.hero-content h1 {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  color: var(--accent);
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(212, 160, 23, 0.4);
  line-height: 1.3;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text);
  margin-bottom: 30px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

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

/* ============================================
   通用容器
   ============================================ */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 5%;
}

.section {
  padding: 60px 0;
}

.section-alt {
  background: var(--surface-alt);
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--accent);
  text-align: center;
  margin-bottom: 12px;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--accent);
  margin: 12px auto 0;
  border-radius: 2px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 40px;
  font-size: 1rem;
}

/* ============================================
   卡片网格
   ============================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.card {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  border-color: var(--accent);
}

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

.card-body {
  padding: 20px;
}

.card-body h3 {
  font-size: 1.2rem;
  color: var(--accent);
  margin-bottom: 10px;
}

.card-body p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 16px;
}

/* ============================================
   游戏小卡片
   ============================================ */
.game-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.game-card {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  text-align: center;
  transition: var(--transition);
}

.game-card:hover {
  border-color: var(--accent);
  transform: scale(1.03);
}

.game-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.game-card-info {
  padding: 14px;
}

.game-card-info h4 {
  color: var(--accent);
  margin-bottom: 6px;
  font-size: 1rem;
}

.game-card-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.btn-play {
  display: inline-block;
  padding: 8px 24px;
  background: var(--accent);
  color: var(--primary);
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.85rem;
  transition: var(--transition);
}

.btn-play:hover {
  background: var(--accent-light);
  color: var(--primary);
}

/* ============================================
   PG电子模块
   ============================================ */
.pg-games {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.pg-game-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.pg-game-item:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 30px rgba(212, 160, 23, 0.2);
}

.pg-game-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.pg-game-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px;
  background: linear-gradient(transparent, rgba(0,0,0,0.9));
  text-align: center;
}

.pg-game-overlay h4 {
  color: var(--white);
  margin-bottom: 8px;
}

/* ============================================
   轮盘走势模块
   ============================================ */
.roulette-trend {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 30px;
  border: 1px solid var(--border);
}

.trend-chart {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin: 20px 0;
}

.trend-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--white);
}

.trend-red { background: #c0392b; }
.trend-black { background: #2c3e50; }
.trend-green { background: #27ae60; }

/* ============================================
   牌照模块
   ============================================ */
.license-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.license-badge {
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid var(--accent);
}

.license-badge img {
  width: 100%;
}

.license-info h3 {
  color: var(--accent);
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.license-info p {
  margin-bottom: 12px;
  color: var(--text-muted);
}

.license-number {
  display: inline-block;
  background: var(--accent);
  color: var(--primary);
  padding: 6px 20px;
  border-radius: 50px;
  font-weight: 700;
  margin-top: 10px;
}

/* ============================================
   文章模块
   ============================================ */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.article-card h3 {
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.article-card .article-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.article-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.article-tag {
  display: inline-block;
  padding: 3px 12px;
  background: rgba(212, 160, 23, 0.15);
  color: var(--accent);
  border-radius: 50px;
  font-size: 0.75rem;
  margin-top: 10px;
}

/* ============================================
   视频模块
   ============================================ */
.video-wrapper {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  max-width: 800px;
  margin: 0 auto;
  aspect-ratio: 16/9;
}

.video-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  background: rgba(212, 160, 23, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  z-index: 5;
}

.video-play-btn::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-left: 24px solid var(--primary);
  border-top: 16px solid transparent;
  border-bottom: 16px solid transparent;
  margin-left: 4px;
}

.video-play-btn:hover {
  background: var(--accent-light);
  transform: translate(-50%, -50%) scale(1.1);
}

/* ============================================
   关于我们模块
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.about-img {
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid var(--border);
}

.about-img img {
  width: 100%;
}

.about-text h3 {
  color: var(--accent);
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.about-text p {
  margin-bottom: 14px;
  color: var(--text-muted);
}

/* ============================================
   充值活动模块
   ============================================ */
.promo-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.promo-card {
  background: linear-gradient(135deg, var(--surface) 0%, var(--primary-light) 100%);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--accent);
  text-align: center;
  transition: var(--transition);
}

.promo-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.promo-card .promo-badge {
  display: inline-block;
  background: var(--accent);
  color: var(--primary);
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.promo-card h3 {
  color: var(--accent);
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.promo-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

/* ============================================
   支付方式
   ============================================ */
.payment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.payment-item {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.payment-item:hover {
  border-color: var(--accent);
}

.payment-item img {
  height: 48px;
  margin: 0 auto 10px;
  width: auto;
}

.payment-item h4 {
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.payment-item p {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ============================================
   客户支持
   ============================================ */
.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.support-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.support-card:hover {
  border-color: var(--accent);
}

.support-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.support-card h4 {
  color: var(--accent);
  margin-bottom: 8px;
}

.support-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============================================
   FAQ模块
   ============================================ */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--surface);
  border-radius: var(--radius);
  margin-bottom: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
}

.faq-question {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--text);
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--accent);
}

.faq-arrow {
  transition: transform 0.3s;
  color: var(--accent);
  font-size: 1.2rem;
}

.faq-item.active .faq-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  color: var(--text-muted);
}

.faq-item.active .faq-answer {
  padding: 0 24px 18px;
  max-height: 500px;
}

/* ============================================
   用户评论
   ============================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.review-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.review-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
}

.review-meta h4 {
  color: var(--text);
  font-size: 0.95rem;
}

.review-meta .review-badge {
  font-size: 0.75rem;
  color: var(--accent);
}

.review-stars {
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 10px;
}

.review-text {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 10px;
}

.review-date {
  font-size: 0.8rem;
  color: var(--border);
}

/* ============================================
   作者信息
   ============================================ */
.author-box {
  display: flex;
  gap: 20px;
  align-items: center;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
  margin: 30px 0;
}

.author-box img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 2px solid var(--accent);
}

.author-info h4 {
  color: var(--accent);
  margin-bottom: 4px;
}

.author-info p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ============================================
   页脚
   ============================================ */
.site-footer {
  background: linear-gradient(180deg, var(--surface-alt) 0%, #0d0520 100%);
  border-top: 2px solid var(--accent);
  padding: 50px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 30px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 5%;
}

.footer-col h4 {
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

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

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-bottom {
  margin-top: 40px;
  padding: 20px 5%;
  border-top: 1px solid var(--border);
  text-align: center;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 8px;
}

.footer-badges {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.footer-badges img {
  height: 40px;
  width: auto;
  opacity: 0.8;
  transition: var(--transition);
}

.footer-badges img:hover {
  opacity: 1;
}

/* ============================================
   APP下载页面
   ============================================ */
.app-hero {
  text-align: center;
  padding: 80px 5%;
  background: linear-gradient(160deg, var(--primary) 0%, var(--primary-light) 100%);
}

.app-hero h1 {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.app-features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.app-feature {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  border: 1px solid var(--border);
}

.app-feature h4 {
  color: var(--accent);
  margin-bottom: 8px;
}

.download-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 30px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: var(--accent);
  color: var(--primary);
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition);
}

.download-btn:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  color: var(--primary);
}

/* ============================================
   内页内容
   ============================================ */
.page-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 5%;
}

.page-content h1 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  color: var(--accent);
  margin-bottom: 20px;
}

.page-content h2 {
  font-size: 1.6rem;
  color: var(--accent);
  margin: 30px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.page-content h3 {
  font-size: 1.2rem;
  color: var(--accent-light);
  margin: 20px 0 10px;
}

.page-content p {
  margin-bottom: 16px;
  color: var(--text-muted);
}

.page-content ul, .page-content ol {
  margin: 16px 0;
  padding-left: 24px;
  color: var(--text-muted);
}

.page-content li {
  margin-bottom: 8px;
}

.content-img {
  border-radius: var(--radius);
  margin: 20px 0;
  border: 1px solid var(--border);
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
}

.info-table th, .info-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.info-table th {
  background: var(--primary-light);
  color: var(--accent);
  font-weight: 600;
}

.info-table td {
  color: var(--text-muted);
}

/* ============================================
   负责任博彩声明
   ============================================ */
.responsible-gaming {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 30px;
  border: 1px solid var(--danger);
  margin: 30px 0;
}

.responsible-gaming h3 {
  color: var(--danger);
  margin-bottom: 14px;
}

.responsible-gaming p {
  color: var(--text-muted);
  margin-bottom: 10px;
}

.age-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--danger);
  color: var(--white);
  padding: 8px 20px;
  border-radius: 50px;
  font-weight: 700;
  margin-top: 10px;
}

.age-badge img {
  width: 30px;
  height: 30px;
}

/* ============================================
   移动端响应式
   ============================================ */
@media (max-width: 768px) {
  html { font-size: 14px; }

  .mobile-toggle { display: block; }

  .main-nav {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
  }

  .main-nav.open {
    max-height: 600px;
  }

  .nav-list {
    flex-direction: column;
  }

  .nav-list a {
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
  }

  .hero-content h1 { font-size: 1.8rem; }
  .hero-content p { font-size: 1rem; }

  .section { padding: 40px 0; }
  .section-title { font-size: 1.5rem; }

  .card-grid,
  .game-cards,
  .pg-games,
  .articles-grid,
  .reviews-grid,
  .promo-cards,
  .support-grid,
  .payment-grid {
    grid-template-columns: 1fr;
  }

  .license-section,
  .about-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-buttons { flex-direction: column; align-items: center; }

  .author-box { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .header-top { flex-direction: column; gap: 10px; }
  .header-actions { width: 100%; justify-content: center; }
}

/* ============================================
   动画效果
   ============================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

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

/* ============================================
   滚动动画观察器
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}