/* 问鼎娱乐 - 全站样式表 */
/* 独特配色：深红+午夜蓝+金色 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700;900&family=ZCOOL+XiaoWei&display=swap');

:root {
  --clr-primary: #1a0a2e;
  --clr-secondary: #b8860b;
  --clr-accent: #c41e3a;
  --clr-dark: #0d0518;
  --clr-surface: #1e1035;
  --clr-surface-alt: #2a1548;
  --clr-text: #e8e0f0;
  --clr-text-muted: #a89bc2;
  --clr-gold: #d4a843;
  --clr-gold-light: #f0d68a;
  --clr-success: #2ecc71;
  --clr-border: rgba(212,168,67,0.25);
  --font-heading: 'Noto Serif SC', serif;
  --font-body: 'ZCOOL XiaoWei', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 20px rgba(196,30,58,0.3);
  --max-width: 1200px;
  --transition: all 0.35s 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-body);
  background: var(--clr-dark);
  color: var(--clr-text);
  line-height: 1.8;
  overflow-x: hidden;
  min-height: 100vh;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--clr-gold); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--clr-gold-light); }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* === 顶部导航 === */
.site-header {
  background: linear-gradient(180deg, var(--clr-primary) 0%, var(--clr-dark) 100%);
  border-bottom: 2px solid var(--clr-border);
  padding: 0;
  position: relative;
  z-index: 100;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-wrap img {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
}

.logo-wrap .brand-name {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--clr-gold), var(--clr-gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-cta {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn-cta {
  display: inline-block;
  padding: 10px 24px;
  border-radius: var(--radius-xl);
  font-weight: 700;
  font-size: 0.95rem;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: var(--font-body);
}

.btn-primary {
  background: linear-gradient(135deg, var(--clr-accent), #e63956);
  color: #fff;
  box-shadow: 0 4px 15px rgba(196,30,58,0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(196,30,58,0.6);
  color: #fff;
}

.btn-gold {
  background: linear-gradient(135deg, var(--clr-gold), var(--clr-gold-light));
  color: var(--clr-dark);
  box-shadow: 0 4px 15px rgba(212,168,67,0.3);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(212,168,67,0.5);
  color: var(--clr-dark);
}

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

.btn-outline:hover {
  background: var(--clr-gold);
  color: var(--clr-dark);
}

/* 主导航 */
.main-nav {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
}

.nav-list {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 0;
  max-width: var(--max-width);
  margin: 0 auto;
  flex-wrap: wrap;
}

.nav-list li a {
  display: block;
  padding: 14px 18px;
  color: var(--clr-text);
  font-size: 0.95rem;
  font-weight: 600;
  position: relative;
  transition: var(--transition);
}

.nav-list li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--clr-accent);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-list li a:hover::after,
.nav-list li a.active::after {
  width: 70%;
}

.nav-list li a:hover {
  color: var(--clr-gold);
  background: rgba(196,30,58,0.1);
}

/* 移动端菜单 */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--clr-gold);
  font-size: 1.8rem;
  cursor: pointer;
  padding: 5px;
}

/* === Hero区域 === */
.hero-section {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

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

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.45);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,10,46,0.85) 0%, rgba(13,5,24,0.7) 50%, rgba(196,30,58,0.2) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 20px;
  text-align: center;
}

.hero-content h1 {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 900;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff, var(--clr-gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.3;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--clr-text-muted);
  max-width: 700px;
  margin: 0 auto 30px;
  line-height: 1.9;
}

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

/* === 通用模块 === */
.section {
  padding: 60px 0;
}

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

.section-dark {
  background: linear-gradient(180deg, var(--clr-dark) 0%, var(--clr-primary) 100%);
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  color: var(--clr-gold);
  position: relative;
}

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

.section-desc {
  text-align: center;
  color: var(--clr-text-muted);
  max-width: 700px;
  margin: 0 auto 40px;
  font-size: 1rem;
}

/* === 卡片网格 === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.card-grid-4 {
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.card-grid-3 {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.game-card {
  background: var(--clr-surface-alt);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--clr-border);
  transition: var(--transition);
  position: relative;
}

.game-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
  border-color: var(--clr-accent);
}

.game-card .card-img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.game-card .card-body {
  padding: 18px;
}

.game-card .card-body h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--clr-gold);
  margin-bottom: 8px;
}

.game-card .card-body p {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  margin-bottom: 14px;
  line-height: 1.7;
}

.game-card .card-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--clr-accent);
  color: #fff;
  padding: 4px 12px;
  border-radius: var(--radius-xl);
  font-size: 0.75rem;
  font-weight: 700;
}

/* === 棋牌游戏网格 === */
.chess-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.chess-card {
  background: linear-gradient(145deg, var(--clr-surface-alt), var(--clr-surface));
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  border: 1px solid var(--clr-border);
  transition: var(--transition);
}

.chess-card:hover {
  border-color: var(--clr-gold);
  box-shadow: 0 0 25px rgba(212,168,67,0.2);
  transform: translateY(-4px);
}

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

.chess-card h4 {
  font-family: var(--font-heading);
  color: var(--clr-gold);
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.chess-card p {
  font-size: 0.85rem;
  color: var(--clr-text-muted);
  margin-bottom: 14px;
}

/* === 足球赛程 === */
.match-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--clr-surface-alt);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.match-table th {
  background: linear-gradient(135deg, var(--clr-accent), #8b1a2e);
  color: #fff;
  padding: 14px 16px;
  font-size: 0.9rem;
  font-weight: 700;
  text-align: left;
}

.match-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--clr-border);
  font-size: 0.9rem;
  color: var(--clr-text);
}

.match-table tr:hover td {
  background: rgba(196,30,58,0.08);
}

.match-table .prediction {
  color: var(--clr-gold);
  font-weight: 700;
}

/* === 牌照模块 === */
.license-section {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-surface));
  border: 2px solid var(--clr-gold);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  gap: 30px;
  align-items: center;
  margin: 40px auto;
  max-width: 900px;
}

.license-section .license-img {
  flex: 0 0 200px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid var(--clr-gold);
}

.license-section .license-img img {
  width: 100%;
  height: auto;
}

.license-section .license-info h3 {
  font-family: var(--font-heading);
  color: var(--clr-gold);
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.license-section .license-info p {
  color: var(--clr-text-muted);
  line-height: 1.8;
  margin-bottom: 10px;
}

/* === 文章模块 === */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

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

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

.article-card .article-meta {
  padding: 18px;
}

.article-card h4 {
  font-family: var(--font-heading);
  color: var(--clr-text);
  font-size: 1.05rem;
  margin-bottom: 8px;
  line-height: 1.5;
}

.article-card .article-date {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  margin-bottom: 8px;
}

.article-card p {
  font-size: 0.88rem;
  color: var(--clr-text-muted);
  line-height: 1.7;
}

/* === 注册模块 === */
.register-section {
  background: linear-gradient(135deg, var(--clr-accent), #8b1a2e);
  border-radius: var(--radius-lg);
  padding: 50px 30px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.register-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
  animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 1; }
}

.register-section h2 {
  font-family: var(--font-heading);
  color: #fff;
  font-size: 2rem;
  margin-bottom: 16px;
  position: relative;
}

.register-section p {
  color: rgba(255,255,255,0.85);
  margin-bottom: 24px;
  position: relative;
}

.register-form {
  display: flex;
  gap: 12px;
  max-width: 500px;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
  position: relative;
}

.register-form input {
  flex: 1;
  min-width: 200px;
  padding: 14px 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-xl);
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
}

.register-form input::placeholder { color: rgba(255,255,255,0.5); }
.register-form input:focus { border-color: var(--clr-gold); background: rgba(255,255,255,0.15); }

/* === 关于我们 === */
.about-flex {
  display: flex;
  gap: 40px;
  align-items: flex-start;
}

.about-flex .about-img {
  flex: 0 0 45%;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid var(--clr-border);
}

.about-flex .about-img img {
  width: 100%;
  height: auto;
}

.about-flex .about-text {
  flex: 1;
}

.about-flex .about-text h3 {
  font-family: var(--font-heading);
  color: var(--clr-gold);
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.about-flex .about-text p {
  margin-bottom: 14px;
  line-height: 1.9;
  color: var(--clr-text);
}

/* === 支付方式 === */
.payment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

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

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

.payment-item .pay-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.payment-item h4 {
  font-size: 0.95rem;
  color: var(--clr-gold);
  margin-bottom: 4px;
}

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

/* === 用户评论 === */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

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

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

.review-card .avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-gold));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
}

.review-card .reviewer-info h4 {
  color: var(--clr-text);
  font-size: 1rem;
  margin-bottom: 2px;
}

.review-card .reviewer-info .reviewer-meta {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
}

.review-card .stars {
  color: var(--clr-gold);
  font-size: 0.9rem;
  margin-bottom: 10px;
}

.review-card .review-text {
  font-size: 0.9rem;
  color: var(--clr-text);
  line-height: 1.7;
  margin-bottom: 10px;
}

.review-card .review-date {
  font-size: 0.78rem;
  color: var(--clr-text-muted);
}

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

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

.faq-question {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  color: var(--clr-text);
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--clr-gold);
  background: rgba(196,30,58,0.05);
}

.faq-question .faq-toggle {
  font-size: 1.2rem;
  color: var(--clr-gold);
  transition: var(--transition);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

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

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}

.faq-answer p {
  color: var(--clr-text-muted);
  line-height: 1.8;
  font-size: 0.92rem;
}

/* === 客户支持 === */
.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

.support-card {
  background: var(--clr-surface-alt);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  border: 1px solid var(--clr-border);
  transition: var(--transition);
}

.support-card:hover {
  border-color: var(--clr-accent);
  transform: translateY(-3px);
}

.support-card .support-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.support-card h4 {
  color: var(--clr-gold);
  margin-bottom: 8px;
  font-size: 1rem;
}

.support-card p {
  font-size: 0.88rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
}

/* === 充值活动 === */
.promo-banner {
  background: linear-gradient(135deg, var(--clr-surface-alt), var(--clr-primary));
  border: 2px solid var(--clr-gold);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
}

.promo-banner .promo-img {
  flex: 0 0 45%;
}

.promo-banner .promo-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.promo-banner .promo-info {
  flex: 1;
  padding: 30px;
}

.promo-banner .promo-info h3 {
  font-family: var(--font-heading);
  color: var(--clr-gold);
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.promo-banner .promo-info p {
  color: var(--clr-text);
  margin-bottom: 12px;
  line-height: 1.8;
}

.promo-list {
  list-style: none;
  margin-bottom: 20px;
}

.promo-list li {
  padding: 6px 0;
  color: var(--clr-text);
  font-size: 0.92rem;
}

.promo-list li::before {
  content: '✦ ';
  color: var(--clr-gold);
}

/* === 免责声明 === */
.disclaimer-bar {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  padding: 20px;
  text-align: center;
}

.disclaimer-bar p {
  font-size: 0.82rem;
  color: var(--clr-text-muted);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.7;
}

.age-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--clr-accent);
  color: var(--clr-accent);
  font-weight: 900;
  font-size: 0.85rem;
  margin: 0 6px;
  vertical-align: middle;
}

/* === 页脚 === */
.site-footer {
  background: var(--clr-dark);
  border-top: 2px solid var(--clr-border);
  padding: 50px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 30px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.footer-col h4 {
  font-family: var(--font-heading);
  color: var(--clr-gold);
  font-size: 1.05rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--clr-accent);
  display: inline-block;
}

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

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

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

.footer-col ul li a:hover {
  color: var(--clr-gold);
  padding-left: 4px;
}

.footer-col p {
  color: var(--clr-text-muted);
  font-size: 0.88rem;
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid var(--clr-border);
  padding: 20px;
  text-align: center;
  margin-top: 40px;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--clr-text-muted);
}

.social-links {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.social-links a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--clr-surface-alt);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-gold);
  font-size: 1rem;
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
  color: #fff;
}

/* === 面包屑 === */
.breadcrumb {
  padding: 14px 0;
  font-size: 0.85rem;
}

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

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

.breadcrumb span {
  color: var(--clr-text-muted);
  margin: 0 6px;
}

.breadcrumb .current {
  color: var(--clr-gold);
}

/* === 内页内容 === */
.page-content {
  padding: 40px 0 60px;
}

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

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

.page-content h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--clr-text);
  margin: 24px 0 12px;
}

.page-content p {
  margin-bottom: 16px;
  line-height: 1.9;
}

.page-content ul, .page-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.page-content li {
  margin-bottom: 6px;
  line-height: 1.7;
}

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

.info-box {
  background: var(--clr-surface-alt);
  border-left: 4px solid var(--clr-gold);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 20px 0;
}

.info-box h4 {
  color: var(--clr-gold);
  margin-bottom: 8px;
}

.info-box p {
  color: var(--clr-text-muted);
  margin-bottom: 0;
}

/* === APP下载页 === */
.download-hero {
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-dark));
}

.download-hero .phone-mockup {
  max-width: 300px;
  margin: 0 auto 30px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.download-hero .phone-mockup img {
  width: 100%;
}

.download-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-xl);
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition);
}

.download-btn.ios {
  background: linear-gradient(135deg, #333, #555);
  color: #fff;
}

.download-btn.android {
  background: linear-gradient(135deg, var(--clr-success), #27ae60);
  color: #fff;
}

.download-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.3);
  color: #fff;
}

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

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

.feature-item .feat-icon {
  font-size: 2rem;
  margin-bottom: 10px;
}

.feature-item h4 {
  color: var(--clr-gold);
  margin-bottom: 6px;
}

.feature-item p {
  font-size: 0.88rem;
  color: var(--clr-text-muted);
}

/* === 作者信息 === */
.author-box {
  display: flex;
  gap: 16px;
  align-items: center;
  background: var(--clr-surface-alt);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--clr-border);
  margin: 30px 0;
}

.author-box .author-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--clr-gold);
}

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

.author-box .author-info p {
  font-size: 0.85rem;
  color: var(--clr-text-muted);
  margin-bottom: 0;
}

/* === 响应式 === */
@media (max-width: 992px) {
  .hero-content h1 { font-size: 2.2rem; }
  .about-flex { flex-direction: column; }
  .about-flex .about-img { flex: none; }
  .license-section { flex-direction: column; text-align: center; }
  .license-section .license-img { flex: none; max-width: 200px; margin: 0 auto; }
  .promo-banner { flex-direction: column; }
  .promo-banner .promo-img { flex: none; }
}

@media (max-width: 768px) {
  .mobile-toggle { display: block; }
  .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
    background: var(--clr-surface);
  }
  .nav-list.show { display: flex; }
  .nav-list li a {
    padding: 12px 20px;
    border-bottom: 1px solid var(--clr-border);
  }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-content p { font-size: 1rem; }
  .section { padding: 40px 0; }
  .section-title { font-size: 1.6rem; }
  .card-grid, .card-grid-3, .card-grid-4 {
    grid-template-columns: 1fr;
  }
  .chess-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .header-cta .btn-cta { padding: 8px 16px; font-size: 0.85rem; }
  .register-form { flex-direction: column; }
  .register-form input { min-width: auto; }
}

@media (max-width: 480px) {
  .hero-content h1 { font-size: 1.5rem; }
  .chess-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .payment-grid { grid-template-columns: repeat(2, 1fr); }
  .support-grid { grid-template-columns: 1fr; }
}