/* ===== 变量与基础 ===== */
:root {
  --color-primary: #c41e3a;
  --color-primary-dark: #9a1830;
  --color-primary-light: #e8354f;
  --color-gold: #d4a853;
  --color-gold-light: #f0d78c;
  --color-bg-dark: #1a0f0f;
  --color-bg-section: #231515;
  --color-bg-card: #2d1c1c;
  --color-bg-card-hover: #3a2424;
  --color-text: #f5ebe0;
  --color-text-muted: #b8a090;
  --color-border: rgba(212, 168, 83, 0.2);
  --font-serif: 'Noto Serif SC', 'SimSun', serif;
  --font-sans: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --shadow-glow: 0 0 40px rgba(196, 30, 58, 0.3);
  --radius: 12px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

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

/* ===== 导航 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(26, 15, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(26, 15, 15, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-gold);
}

.logo-icon {
  font-size: 1.8rem;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-gold);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--color-gold);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-gold);
  transition: var(--transition);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: 0 4px 20px rgba(196, 30, 58, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(196, 30, 58, 0.5);
}

.btn-outline {
  border-color: var(--color-gold);
  color: var(--color-gold);
  background: transparent;
}

.btn-outline:hover {
  background: rgba(212, 168, 83, 0.1);
}

/* ===== 英雄区 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(196, 30, 58, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(212, 168, 83, 0.1) 0%, transparent 40%),
    linear-gradient(180deg, #1a0f0f 0%, #2a1515 50%, #1a0f0f 100%);
}

.hero-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0L60 30L30 60L0 30Z' fill='%23d4a853'/%3E%3C/svg%3E");
  background-size: 60px 60px;
}

.floating-tiles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.tile {
  position: absolute;
  font-size: 3rem;
  opacity: 0.15;
  animation: float 6s ease-in-out infinite;
}

.tile-1 { top: 15%; left: 10%; animation-delay: 0s; }
.tile-2 { top: 25%; right: 15%; animation-delay: 1s; font-size: 2.5rem; }
.tile-3 { bottom: 30%; left: 8%; animation-delay: 2s; }
.tile-4 { top: 40%; right: 8%; animation-delay: 0.5s; font-size: 4rem; }
.tile-5 { bottom: 20%; right: 20%; animation-delay: 1.5s; font-size: 2rem; }

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

.hero-content {
  position: relative;
  text-align: center;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(212, 168, 83, 0.15);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--color-gold);
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease;
}

.hero-title {
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease 0.1s both;
}

.title-line {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.1em;
}

.title-sub {
  display: block;
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  color: var(--color-text-muted);
  font-weight: 300;
  margin-top: 8px;
  letter-spacing: 0.3em;
}

.hero-desc {
  max-width: 640px;
  margin: 0 auto 40px;
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-bottom: 40px;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.stat {
  text-align: center;
}

.stat-num {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-gold);
}

.stat-unit {
  font-size: 1.2rem;
  color: var(--color-gold);
}

.stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  animation: fadeInUp 0.8s ease 0.6s both;
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--color-gold);
  border-bottom: 2px solid var(--color-gold);
  transform: rotate(45deg);
  margin: 8px auto 0;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50% { transform: rotate(45deg) translateY(8px); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 通用区块 ===== */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--color-primary-light);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--color-gold);
  margin-bottom: 16px;
}

.section-desc {
  max-width: 560px;
  margin: 0 auto;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* ===== 游戏玩法 ===== */
.games {
  background: var(--color-bg-section);
}

.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px;
}

.game-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 36px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.game-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
  opacity: 0;
  transition: var(--transition);
}

.game-card:hover {
  transform: translateY(-4px);
  border-color: rgba(212, 168, 83, 0.4);
  box-shadow: var(--shadow-glow);
}

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

.game-mahjong::before {
  background: linear-gradient(90deg, var(--color-primary), #e8354f);
}

.game-doudizhu::before {
  background: linear-gradient(90deg, var(--color-gold), #f0d78c);
}

.game-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.game-icon {
  font-size: 2.5rem;
}

.game-card-header h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--color-gold);
  flex: 1;
}

.game-tag {
  padding: 4px 12px;
  background: rgba(196, 30, 58, 0.2);
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--color-primary-light);
}

.game-doudizhu .game-tag {
  background: rgba(212, 168, 83, 0.2);
  color: var(--color-gold);
}

.game-intro {
  color: var(--color-text-muted);
  margin-bottom: 24px;
  line-height: 1.8;
}

.game-rules {
  margin-bottom: 24px;
}

.game-rules li {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.game-rules li strong {
  color: var(--color-text);
}

.game-highlights {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.game-highlights span {
  padding: 6px 14px;
  background: rgba(212, 168, 83, 0.1);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--color-gold);
}

/* ===== 特色 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

.feature-item {
  padding: 32px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.feature-item:hover {
  background: var(--color-bg-card-hover);
  border-color: rgba(212, 168, 83, 0.3);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.feature-item h4 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-gold);
  margin-bottom: 12px;
}

.feature-item p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== 姐妹团 ===== */
.characters {
  background: var(--color-bg-section);
}

.characters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.character-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.character-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.character-card[data-color="red"]::after { background: var(--color-primary); }
.character-card[data-color="gold"]::after { background: var(--color-gold); }
.character-card[data-color="green"]::after { background: #4a9c6d; }
.character-card[data-color="blue"]::after { background: #4a7ec4; }

.character-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.character-avatar {
  font-size: 4rem;
  margin-bottom: 16px;
}

.character-card h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--color-gold);
  margin-bottom: 8px;
}

.character-role {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.character-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  text-align: left;
}

.character-card blockquote {
  font-style: italic;
  font-size: 0.85rem;
  color: var(--color-gold);
  padding: 12px;
  background: rgba(212, 168, 83, 0.08);
  border-radius: 8px;
  border-left: 3px solid var(--color-gold);
  text-align: left;
}

/* ===== 活动 ===== */
.events-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.event-card {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
  position: relative;
}

.event-card:hover {
  border-color: rgba(212, 168, 83, 0.4);
  background: var(--color-bg-card-hover);
}

.event-hot {
  border-color: rgba(196, 30, 58, 0.4);
  box-shadow: 0 0 30px rgba(196, 30, 58, 0.15);
}

.event-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 12px;
  background: var(--color-primary);
  border-radius: 20px;
  font-size: 0.75rem;
  color: #fff;
}

.event-badge.upcoming {
  background: rgba(212, 168, 83, 0.3);
  color: var(--color-gold);
}

.event-date {
  flex-shrink: 0;
  width: 72px;
  text-align: center;
  padding: 12px;
  background: rgba(212, 168, 83, 0.1);
  border-radius: 8px;
}

.event-date .month {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.event-date .day {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-gold);
}

.event-info h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-text);
  margin-bottom: 8px;
  padding-right: 80px;
}

.event-info p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
  line-height: 1.7;
}

.event-link {
  font-size: 0.9rem;
  color: var(--color-gold);
  transition: var(--transition);
}

.event-link:hover {
  color: var(--color-gold-light);
}

/* ===== 评价 ===== */
.reviews {
  background: var(--color-bg-section);
  overflow: hidden;
}

.reviews-slider {
  overflow: hidden;
  margin: 0 -24px;
  padding: 0 24px;
}

.review-track {
  display: flex;
  gap: 24px;
  transition: transform 0.5s ease;
}

.review-card {
  flex: 0 0 calc(33.333% - 16px);
  min-width: 280px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}

.review-stars {
  color: var(--color-gold);
  font-size: 1rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  font-style: italic;
}

.review-card cite {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: normal;
}

.reviews-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 32px;
}

.reviews-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: rgba(212, 168, 83, 0.3);
  cursor: pointer;
  transition: var(--transition);
}

.reviews-dots button.active {
  background: var(--color-gold);
  width: 24px;
  border-radius: 5px;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}

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

.faq-item summary {
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 500;
  color: var(--color-text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--color-gold);
  transition: var(--transition);
}

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

.faq-item summary:hover {
  color: var(--color-gold);
}

.faq-item p {
  padding: 0 24px 20px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===== 下载 ===== */
.download {
  background:
    radial-gradient(ellipse at center, rgba(196, 30, 58, 0.2) 0%, transparent 60%),
    var(--color-bg-section);
}

.download-box {
  display: flex;
  align-items: center;
  gap: 48px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 48px;
  box-shadow: var(--shadow-glow);
}

.download-content {
  flex: 1;
}

.download-content h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--color-gold);
  margin-bottom: 16px;
}

.download-content > p {
  color: var(--color-text-muted);
  margin-bottom: 28px;
  line-height: 1.7;
}

.download-content strong {
  color: var(--color-gold-light);
}

.download-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.download-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  transition: var(--transition);
}

.download-btn:hover {
  background: rgba(212, 168, 83, 0.15);
  border-color: var(--color-gold);
  transform: translateY(-2px);
}

.dl-icon {
  font-size: 1.8rem;
}

.dl-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.dl-text small {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.download-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.download-qr {
  flex-shrink: 0;
}

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

.qr-code {
  width: 140px;
  height: 140px;
  background:
    linear-gradient(45deg, #333 25%, transparent 25%),
    linear-gradient(-45deg, #333 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #333 75%),
    linear-gradient(-45deg, transparent 75%, #333 75%);
  background-size: 10px 10px;
  background-position: 0 0, 0 5px, 5px -5px, -5px 0;
  background-color: #fff;
  border-radius: 8px;
  margin-bottom: 8px;
  position: relative;
}

.qr-code::after {
  content: '🀄';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  background: rgba(255, 255, 255, 0.9);
  margin: 40px;
  border-radius: 4px;
}

.qr-placeholder span {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ===== 页脚 ===== */
.footer {
  background: #120a0a;
  border-top: 1px solid var(--color-border);
  padding: 60px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.footer-links h4 {
  font-size: 0.9rem;
  color: var(--color-gold);
  margin-bottom: 16px;
}

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

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

.footer-links a:hover {
  color: var(--color-gold);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  opacity: 0.7;
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
  .review-card {
    flex: 0 0 calc(50% - 12px);
  }

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

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

  .download-buttons {
    justify-content: center;
  }

  .dl-text {
    text-align: left;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(26, 15, 15, 0.98);
    flex-direction: column;
    padding: 24px;
    gap: 0;
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-links li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-links a {
    display: block;
    padding: 16px 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero-stats {
    gap: 24px;
  }

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

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

  .event-card {
    flex-direction: column;
  }

  .event-info h3 {
    padding-right: 0;
  }

  .review-card {
    flex: 0 0 100%;
  }

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

  .section {
    padding: 72px 0;
  }
}