/* fqapp 项目主页样式：纸色底 + 橙色强调，支持深色模式 */
:root {
  --bg: #FFFEF0;
  --bg-alt: #faf3df;
  --surface: #ffffff;
  --text: #2b2118;
  --muted: #7a6a58;
  --line: #e8dcC4;
  --accent: #FA6725;
  --accent-dark: #d94f14;
  --shadow: 0 4px 18px rgba(90, 60, 20, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171310;
    --bg-alt: #1f1a15;
    --surface: #241e18;
    --text: #f2e9d8;
    --muted: #b3a28a;
    --line: #3a3128;
    --accent: #ff7d3d;
    --accent-dark: #ff8f57;
    --shadow: 0 4px 18px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

.container {
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--accent-dark); }
code {
  background: var(--bg-alt);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.92em;
  word-break: break-all;
}

/* 页眉 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 58px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
}
.brand img { border-radius: 9px; }
.nav { display: flex; gap: 20px; flex-wrap: wrap; }
.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}
.nav a:hover { color: var(--accent-dark); }

/* Hero */
.hero { text-align: center; padding: 64px 0 48px; }
.hero-logo { border-radius: 26px; box-shadow: var(--shadow); }
.hero h1 { font-size: 2.8rem; margin: 18px 0 4px; letter-spacing: 0.01em; }
.tagline { font-size: 1.25rem; margin: 0; }
.subtitle { color: var(--muted); margin: 10px 0 26px; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-version { color: var(--muted); font-size: 0.92rem; margin: 18px 0 14px; }
.badges { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; align-items: center; }
.badges img { height: 20px; }
.notice {
  max-width: 760px;
  margin: 30px auto 0;
  text-align: left;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 18px;
  font-size: 0.9rem;
  color: var(--muted);
}
.notice p { margin: 0; }

/* 按钮 */
.btn {
  display: inline-block;
  padding: 11px 26px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  border: 1.5px solid var(--accent);
  transition: opacity 0.15s ease;
}
.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-ghost { background: transparent; color: var(--accent-dark); }
.btn-sponsor { background: #946ce6; border-color: #946ce6; color: #fff; }

/* 章节 */
.section { padding: 54px 0; }
.section-alt { background: var(--bg-alt); }
.section h2 { font-size: 1.8rem; margin: 0 0 6px; }
.section-lead { color: var(--muted); margin: 0 0 28px; }

/* 卡片网格 */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); margin-top: 22px; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px 22px;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 8px; font-size: 1.08rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.card ul, .card ol { margin: 0; padding-left: 1.25em; color: var(--muted); font-size: 0.95rem; }
.card li { margin-bottom: 6px; }

/* 截图占位（手机框） */
.phones {
  display: flex;
  gap: 28px;
  justify-content: center;
  flex-wrap: wrap;
}
.phone { margin: 0; text-align: center; }
.phone-screen {
  width: 190px;
  height: 390px;
  border: 9px solid #26201a;
  border-radius: 34px;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px;
}
@media (prefers-color-scheme: dark) {
  .phone-screen { border-color: #0c0a08; }
}
.phone-screen img { border-radius: 14px; opacity: 0.9; }
.phone-label { font-weight: 600; margin: 0; }
.phone-soon { color: var(--muted); font-size: 0.88rem; margin: 0; }
.phone figcaption { margin-top: 10px; color: var(--muted); font-size: 0.92rem; }

/* 下载 */
.download-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.download-note { color: var(--muted); font-size: 0.92rem; margin-top: 14px; }

/* 赞助 */
.sponsor-box {
  display: flex;
  align-items: flex-start;
  gap: 36px;
  flex-wrap: wrap;
}
.wechat { margin: 0; text-align: center; }
.wechat img {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}
.wechat figcaption { color: var(--muted); font-size: 0.92rem; margin-top: 8px; }

/* 页脚 */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 30px 0 40px;
  color: var(--muted);
  font-size: 0.92rem;
}
.footer-disclaimer { font-size: 0.85rem; }

/* 窄屏 */
@media (max-width: 820px) {
  .grid { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .hero { padding: 44px 0 36px; }
  .hero h1 { font-size: 2.2rem; }
  .nav { gap: 12px; }
  .header-inner { height: auto; padding-top: 10px; padding-bottom: 10px; flex-wrap: wrap; gap: 6px; }
}