body {
  font-family: 'Inter', 'Helvetica Neue', Helvetica, Arial, ui-sans-serif, sans-serif;
}
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap');

/* 重置默认样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }

body.theme-nordic {
  --bg: #fff;
  --bg2: #E4EAF2;
  --card: linear-gradient(135deg, #f7fbff 65%, #e9eff6 100%);
  --glass: rgba(255,255,255,0.79);
  --text: #31405c;
  --muted: #7b90a7;
  --heading: #31405c;
  --nav: #a8bdd8;
  --btn: #2e476a;
  --btn-grad: linear-gradient(120deg, #A8BDD8 10%, #2e476a 80%);
  --btn-hover: #ff8356;
  --orange: #FFC99B;
  --coral: #FF8356;
  --border: #d7e0eb;
  --box: 0 4px 32px -14px #a8bdd834, 0 .5px 2.5px 0 #fff4;
  --measure: 68ch;
}

/* 强制应用主题样式 */
body.theme-nordic {
  background: var(--bg) !important;
  color: var(--text) !important;
  font-family: 'Inter', 'Helvetica Neue', Helvetica, Arial, ui-sans-serif, sans-serif !important;
  line-height: 1.7 !important;
  -webkit-font-smoothing: antialiased !important;
  -moz-osx-font-smoothing: grayscale !important;
  text-rendering: optimizeLegibility !important;
}

/* 基础布局 */
body { margin: 0 !important; }
.container { max-width: 970px; margin: 0 auto; padding: 0 26px; }

/* 头部导航 */
header { 
  background: var(--glass) !important; 
  border-bottom: 1.5px solid var(--bg2) !important; 
  box-shadow: 0 6px 80px -38px #31405c22 !important; 
  position: sticky !important;
  top: 0 !important;
  z-index: 10 !important;
}
.nav { 
  display: flex !important; 
  align-items: center !important; 
  justify-content: space-between !important; 
  min-height: 70px !important; 
}
.brand { 
  font-weight: 800 !important; 
  font-size: 1.5rem !important; 
  letter-spacing: 0.04em !important; 
  display: flex !important; 
  align-items: center !important; 
  gap: 12px !important; 
  color: var(--heading) !important; 
  text-decoration: none !important;
}
.brand-badge { 
  width: 32px !important; 
  height: 32px !important; 
  border-radius: 8px !important; 
  background: linear-gradient(125deg, #a8bdd8 60%, #ff8356 120%) !important; 
  box-shadow: 0 2.5px 12px -4px #ff835692, 0 .5px 2.5px 0 #fff8 !important; 
  border: 2px solid #e4eaf2 !important; 
}
.nav-links { 
  display: flex !important; 
  gap: 18px !important; 
}
.nav-links a { 
  color: var(--btn) !important; 
  font-weight: 600 !important; 
  font-size: 1.1em !important; 
  letter-spacing: 0.01em !important; 
  opacity: .92 !important; 
  background: none !important; 
  border-radius: 9px !important; 
  padding: 8px 14px !important; 
  transition: background 0.16s, color 0.18s !important; 
  text-decoration: none !important;
}
.nav-links a:hover { 
  background: var(--orange) !important; 
  color: #2e476a !important; 
  opacity: 1 !important; 
}

/* 主要内容区域 */
.hero { 
  padding: 60px 0 36px !important; 
  text-align: center !important; 
  background: none !important; 
}
h1 { 
  color: transparent !important;
  background: linear-gradient(120deg, #2e476a 10%, #ff8356 85%) !important;
  -webkit-background-clip: text !important;
  background-clip: text !important;
  font-size: clamp(2rem, 3.6vw, 2.8rem) !important;
  letter-spacing: 0.02em !important; 
  font-weight: 900 !important; 
  margin-bottom: .15em !important; 
}
.hero-desc { 
  color: var(--muted) !important; 
  font-size: 1.22em !important; 
  margin: 0 0 28px !important; 
}

/* 正文文字与可读性 */
main p {
  max-width: var(--measure) !important;
  font-size: 1.06em !important;
  line-height: 1.8 !important;
  color: color-mix(in oklab, var(--text) 88%, black) !important;
}
main ul, main ol {
  max-width: var(--measure) !important;
}
main a { text-underline-offset: 3px !important; text-decoration-thickness: 1.5px !important; }

/* 按钮样式 */
.btn-primary {
  background: var(--btn-grad) !important;
  color: #fff !important;
  border: none !important;
  border-radius: 14px !important;
  padding: 15px 38px !important;
  font-weight: 700 !important;
  font-size: 1.13em !important;
  letter-spacing: 0.05em !important;
  box-shadow: 0 2.5px 20px -5px var(--bg2), 0 0.5px 3px 0 #fffffa18 !important;
  transition: background 0.16s, box-shadow 0.18s, color 0.18s, transform 0.14s !important;
  margin-top: 12px !important;
  text-decoration: none !important;
  display: inline-block !important;
  cursor: pointer !important;
}
.btn-primary:hover {
  color: #fff !important; 
  background: var(--btn-hover) !important;
  transform: translateY(-1px) scale(1.035) !important;
  box-shadow: 0 6px 24px -4px var(--coral) !important;
}

/* 内容区块 */
section {
  background: var(--card) !important; 
  border-radius: 23px !important;
  box-shadow: var(--box) !important;
  margin-top: 52px !important;
  margin-bottom: 48px !important;
  padding: 42px 30px !important;
}
section h2 {
  font-size: clamp(1.5rem, 2.2vw, 2rem) !important; 
  color: var(--heading) !important; 
  font-weight: 800 !important; 
  letter-spacing: 0.01em !important;
  margin: 0 0 14px 0 !important; 
}

/* 列表样式 */
ul.feature-list {
  color: var(--text) !important;
  font-size: 1.05em !important;
  margin: 18px 0 0 0 !important;
  padding-left: 1.3em !important; 
}
ul.feature-list li { 
  margin-bottom: 11px !important; 
}
ul li::marker { color: var(--coral) !important; font-weight: 900 !important; }
.how-to-play ol, .tips ul { 
  padding-left: 1.38em !important; 
}
.how-to-play li, .tips li { 
  margin-bottom: 9px !important; 
}

/* FAQ样式 */
.faq h2 { 
  color: var(--coral) !important; 
}
.faq dl {
  margin-bottom: 0 !important;
  margin-top: 20px !important;
}
dt { 
  font-weight: 700 !important; 
  color: var(--btn) !important;
  font-size: 1.18em !important; 
  margin-top: 18px !important;
  margin-bottom: 7px !important;
}
dd { 
  margin-bottom: 13px !important; 
  margin-left: 18px !important; 
  color: var(--muted) !important;
  font-size: 1.05em !important; 
}

/* 游戏容器与iframe（固定 750x540） */
.game-box { width: 750px !important; height: 540px !important; margin: 0 auto !important; }
iframe.game { 
  width: 100% !important; 
  height: 100% !important; 
  max-width: none !important;
  aspect-ratio: auto !important;
  display: block !important; 
  border: none !important; 
  border-radius: 18px !important; 
  background: #e4eaf2 !important; 
  box-shadow: 0 12px 40px -20px #b1bed444, 0 0.5px 1.5px 0 #fff6 !important;
}

/* 全屏时铺满视口 */
.game-box:fullscreen, .game-box:-webkit-full-screen, .game-box:-ms-fullscreen { 
  width: 100vw !important; height: 100vh !important; border-radius: 0 !important; 
}
.game-box:fullscreen iframe, .game-box:-webkit-full-screen iframe, .game-box:-ms-fullscreen iframe { 
  width: 100% !important; height: 100% !important; border-radius: 0 !important; 
}

/* 游戏动作区 */
.game-actions { text-align:center !important; margin-top: 10px !important; }
.btn-ghost {
  background: transparent !important;
  color: var(--btn) !important;
  border: 1.5px solid var(--bg2) !important;
  border-radius: 12px !important;
  padding: 10px 16px !important;
  font-weight: 700 !important;
  display: inline-block !important;
}
.btn-ghost:hover { background: var(--orange) !important; color: #2e476a !important; }

/* 页脚 */
footer { 
  text-align: center !important; 
  color: var(--muted) !important; 
  padding: 42px 0 26px !important; 
  font-size: 1.01em !important; 
  background: none !important;
}
footer a {
  color: var(--muted) !important;
  text-decoration: underline !important;
  text-underline-offset: 2px !important;
  transition: color 0.2s !important;
}
footer a:hover {
  color: var(--btn) !important;
}

/* 卡片内输入和表单优化 */
form textarea, form input[type=text] {
  font-family: inherit !important;
  border-radius: 12px !important;
  border: 1.5px solid var(--bg2) !important;
  background: #f8fafc !important;
  color: var(--btn) !important;
  min-height: 56px !important;
  padding: 13px 15px !important;
  font-size: 1em !important;
  margin-bottom: 11px !important;
  box-shadow: 0 1px 6px -2px #e4eaf2cc !important;
  transition: border 0.18s, box-shadow 0.17s !important;
  resize: vertical !important;
}
form textarea:focus, form input[type=text]:focus {
  border-color: var(--btn) !important;
  box-shadow: 0 0 0 2px var(--orange) !important;
  outline: none !important;
}
form label { 
  font-weight: 700 !important; 
  color: var(--btn) !important; 
  margin-bottom: 7px !important; 
  display: block !important; 
}

/* 响应式设计 */
@media (max-width: 800px) { 
  .container { max-width: 98vw !important; } 
}
@media (max-width: 650px) {
  .container { padding: 0 2vw !important; }
  section { 
    padding: 18px 6px !important; 
    border-radius: 13px !important; 
  }
  .hero { padding: 21px 0 13px !important; }
  iframe.game { min-height: 150px !important; }
  h1 { font-size: 1.31em !important; }
}

/* Screenshots */
.screens-grid { display: grid !important; grid-template-columns: repeat(2, minmax(0,1fr)) !important; gap: 14px !important; }
.shot img { width: 100% !important; aspect-ratio: 16/9 !important; height: auto !important; object-fit: cover !important; border-radius: 16px !important; box-shadow: 0 10px 32px -14px #a8bdd8aa, 0 1px 2px #fff8 !important; background: #e4eaf2 !important; }
@media (max-width: 760px){ .screens-grid { grid-template-columns: 1fr !important; } }