/* 小游答题官网 —— 品牌色与 APP 一致（sky #2699ED） */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  color: #21364d; background: #fff; line-height: 1.7;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* 顶部导航 */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid #e8f0f8;
}
.nav-inner { display: flex; align-items: center; gap: 32px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; }
.brand img { width: 34px; height: 34px; border-radius: 8px; }
.nav-links { display: flex; gap: 28px; margin-left: auto; font-size: 15px; color: #4a5e75; }
.nav-links a:hover { color: #2699ed; }
.btn-download-sm {
  background: #2699ed; color: #fff; padding: 8px 18px; border-radius: 999px;
  font-size: 14px; transition: background 0.2s;
}
.btn-download-sm:hover { background: #1478c2; }

/* 主视觉 */
.hero {
  background: linear-gradient(180deg, #eaf5ff 0%, #f7fbff 70%, #fff 100%);
  padding: 72px 0 56px; overflow: hidden;
}
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero-text h1 { font-size: 44px; line-height: 1.25; letter-spacing: 1px; }
.slogan { margin: 18px 0 22px; color: #5b7085; font-size: 17px; }
.hero-points { list-style: none; display: grid; gap: 10px; margin-bottom: 30px; font-size: 15px; color: #3c5068; }
.hero-points i { color: #2699ed; margin-right: 8px; }
.hero-actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.btn-download {
  background: #2699ed; color: #fff; padding: 13px 32px; border-radius: 14px;
  font-size: 17px; display: inline-flex; align-items: center; gap: 8px;
  box-shadow: 0 8px 24px rgba(38, 153, 237, 0.35); transition: transform 0.15s, background 0.2s;
}
.btn-download:hover { background: #1478c2; transform: translateY(-1px); }
.btn-ghost { color: #5b7085; border: 1px solid #cfe3f3; padding: 12px 24px; border-radius: 14px; font-size: 15px; }
.btn-ghost:hover { color: #2699ed; border-color: #2699ed; }

/* 手机样机 */
.hero-mockup { display: flex; justify-content: center; }
.phone {
  width: 270px; border-radius: 36px; background: #0f172a; padding: 12px;
  box-shadow: 0 24px 60px rgba(20, 50, 90, 0.25); transform: rotate(3deg);
}
.phone-notch {
  width: 96px; height: 6px; background: #0f172a; border-radius: 0 0 10px 10px;
  margin: 0 auto 8px; position: relative; top: -6px;
}
.phone-screen {
  background: #f5f9fd; border-radius: 26px; overflow: hidden; padding: 10px 12px 16px;
  display: flex; flex-direction: column; min-height: 420px;
}
.mock-statusbar { display: flex; justify-content: space-between; font-size: 11px; color: #73859a; padding: 2px 4px 8px; }
.mock-tabs { display: flex; gap: 10px; font-size: 11px; color: #73859a; padding: 0 4px 10px; }
.mock-tabs .active { color: #1478c2; font-weight: 700; }
.mock-chips { display: flex; flex-wrap: wrap; gap: 5px; padding: 0 4px 12px; }
.mock-chips span {
  font-size: 10px; padding: 4px 10px; border-radius: 8px;
  background: #fff; color: #73859a; border: 1px solid #e0ebf4;
}
.mock-chips .on { background: #2699ed; color: #fff; border-color: #2699ed; }
.mock-card {
  background: #fff; border-radius: 16px; padding: 26px 14px; text-align: center;
  min-height: 120px; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(38, 153, 237, 0.08);
}
.mock-card p { font-size: 15px; font-weight: 700; color: #21364d; }
.mock-options { display: flex; gap: 10px; margin-top: 12px; }
.mock-options button {
  flex: 1; padding: 12px 0; border: none; border-radius: 12px;
  background: #fff; color: #21364d; font-size: 14px; font-weight: 600;
  box-shadow: 0 2px 8px rgba(38, 153, 237, 0.1);
}
.mock-options button:first-child { color: #2699ed; }

/* 数据亮点 */
.stats { background: #fff; padding: 10px 0 46px; }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  border: 1px solid #e4eef7; border-radius: 20px; padding: 28px 12px;
  background: linear-gradient(180deg, #fbfdff, #f3f9fe);
}
.stat { text-align: center; }
.stat b { display: block; font-size: 34px; color: #2699ed; line-height: 1.2; }
.stat span { font-size: 14px; color: #73859a; }

/* 通用标题 */
.section-title { text-align: center; font-size: 30px; margin-bottom: 8px; }
.section-sub { text-align: center; color: #73859a; margin-bottom: 40px; }

/* 功能特色 */
.features { padding: 56px 0 64px; background: #fff; }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature {
  border: 1px solid #e8f0f8; border-radius: 18px; padding: 28px 24px;
  transition: box-shadow 0.2s, transform 0.2s;
}
.feature:hover { box-shadow: 0 12px 32px rgba(38, 153, 237, 0.12); transform: translateY(-3px); }
.feature i { font-size: 30px; color: #2699ed; }
.feature h3 { font-size: 18px; margin: 12px 0 8px; }
.feature p { font-size: 14px; color: #5b7085; }

/* 篇章 */
.chapters { padding: 52px 0 68px; background: linear-gradient(180deg, #f7fbff, #eef6fd); }
.chapter-flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.chapter {
  background: #fff; border-radius: 14px; text-align: center; padding: 20px 8px;
  border: 1px solid #dcebf7;
}
.chapter b { display: block; font-size: 16px; }
.chapter span { font-size: 12px; color: #73859a; }

/* 下载区 */
.download { background: linear-gradient(135deg, #2699ed, #1478c2); color: #fff; padding: 60px 0; }
.download-inner { display: flex; align-items: center; gap: 36px; justify-content: center; flex-wrap: wrap; }
.dl-logo { width: 96px; height: 96px; border-radius: 22px; box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2); }
.dl-text h2 { font-size: 28px; margin-bottom: 6px; }
.dl-text > p { color: rgba(255, 255, 255, 0.85); font-size: 15px; margin-bottom: 18px; }
.btn-download-lg {
  background: #fff; color: #1478c2; padding: 14px 36px; border-radius: 14px;
  font-size: 17px; font-weight: 700; display: inline-flex; align-items: center; gap: 8px;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.18); transition: transform 0.15s;
}
.btn-download-lg:hover { transform: translateY(-2px); }
.dl-pending { display: inline-block; background: rgba(255,255,255,0.18); padding: 14px 28px; border-radius: 14px; font-size: 16px; }
.dl-note { margin-top: 14px; font-size: 12.5px !important; color: rgba(255, 255, 255, 0.7) !important; }

/* 页脚 */
.site-footer {
  background: #0f1c2b; color: #8fa2b8; text-align: center; padding: 36px 0 28px; font-size: 13.5px;
}
.footer-links { display: flex; justify-content: center; gap: 28px; margin-bottom: 12px; }
.footer-links a:hover { color: #fff; }
.copyright { margin-bottom: 6px; }
.icp { color: #8fa2b8; }
.icp:hover { color: #fff; }
.icp-pending { opacity: 0.55; font-size: 12px; }

/* 移动端适配 */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-text h1 { font-size: 32px; }
  .hero { padding: 44px 0 40px; }
  .hero-mockup { order: -1; }
  .phone { transform: none; }
  .nav-links { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px 8px; }
  .features-grid { grid-template-columns: 1fr; }
  .chapter-flow { grid-template-columns: repeat(3, 1fr); }
  .download-inner { text-align: center; flex-direction: column; gap: 20px; }
}