:root {
  --orange: #FF7A00;
  --orange-dark: #E86A00;
  --orange-light: #FFF3E8;
  --bg: #FAFAFA;
  --card: #FFFFFF;
  --text: #2B2B2B;
  --muted: #8A8A8A;
  --border: #ECECEC;
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* 顶栏 */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  background: var(--card);
  border-bottom: 3px solid var(--orange);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}
.brand:hover { opacity: .85; }
.logo { font-size: 32px; }
.brand h1 { font-size: 22px; color: var(--orange); }
.tagline { font-size: 12px; color: var(--muted); }
.nav a {
  text-decoration: none;
  color: var(--text);
  margin-left: 20px;
  font-weight: 600;
  padding-bottom: 4px;
}
.nav a.active { color: var(--orange); border-bottom: 2px solid var(--orange); }

/* 控制区 */
.controls {
  max-width: 1100px;
  margin: 24px auto 0;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
#search {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  outline: none;
}
#search:focus { border-color: var(--orange); }
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  cursor: pointer;
  font-size: 13px;
  color: var(--muted);
  transition: .15s;
}
.chip.active, .chip:hover {
  background: var(--orange);
  color: #fff;
  border-color: var(--orange);
}

/* 网格 */
main { max-width: 1100px; margin: 0 auto; padding: 24px; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: .2s;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}
.card h3,
.card p {
  text-decoration: none;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(255,122,0,.15);
  border-color: var(--orange);
}
.card img { width: 100%; height: 140px; object-fit: cover; background: var(--orange-light); }
.card-body { padding: 14px; flex: 1; display: flex; flex-direction: column; gap: 8px; }
.card-body h3 { font-size: 16px; }
.card-body p { font-size: 13px; color: var(--muted); flex: 1;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-size: 11px;
  background: var(--orange-light);
  color: var(--orange-dark);
  padding: 2px 8px;
  border-radius: 6px;
}
.card-foot { display: flex; justify-content: space-between; align-items: center; }
.size { font-size: 12px; color: var(--muted); }
.btn-download {
  text-decoration: none;
  background: var(--orange);
  color: #fff;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}
.btn-download:hover { background: var(--orange-dark); }

.empty { text-align: center; color: var(--muted); margin-top: 40px; }

/* 详情页 */
.detail { max-width: 800px; }
.back { display: inline-block; margin-bottom: 16px; color: var(--orange); text-decoration: none; font-weight: 600; }
.detail-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.detail-card img.cover { width: 100%; height: 280px; object-fit: cover; background: var(--orange-light); }
.detail-inner { padding: 24px; }
.detail-inner h2 { color: var(--orange); margin-bottom: 8px; }
.detail-inner .meta { color: var(--muted); font-size: 13px; margin: 12px 0; }
.detail-inner .desc { margin: 16px 0; }
.big-download, button.big-download {
  display: inline-block;
  background: var(--orange);
  color: #fff;
  text-decoration: none;
  padding: 12px 28px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 16px;
  border: none;
  cursor: pointer;
  font-family: inherit;
}
.big-download:hover, button.big-download:hover { background: var(--orange-dark); }

/* 后台 */
.admin { max-width: 720px; }
.upload-form, .existing {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 24px;
}
.upload-form h2, .existing h2 { color: var(--orange); margin-bottom: 16px; }
.upload-form label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 14px; }
.upload-form input, .upload-form textarea {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}
.upload-form textarea { resize: vertical; min-height: 70px; }
.row { display: flex; gap: 16px; }
.row label { flex: 1; }
.btn-primary {
  background: var(--orange);
  color: #fff;
  border: none;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}
.btn-primary:hover { background: var(--orange-dark); }
.save-tip { margin-top: 12px; color: var(--orange-dark); font-size: 13px; }
.game-list { list-style: none; }
.game-list li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 14px;
}
.game-list .del { color: #d33; cursor: pointer; background: none; border: none; font-size: 13px; }
.btn-ghost {
  margin-top: 12px; background: none; border: 1px solid var(--orange);
  color: var(--orange); padding: 8px 16px; border-radius: 8px; cursor: pointer; font-weight: 600;
}
.btn-ghost:hover { background: var(--orange-light); }

/* 页脚 */
  .footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 32px 24px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}
.footer p + p { margin-top: 14px; }
.footer .disclaimer {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
  color: #a3a3a3;
  opacity: .9;
}
.footer .beian { margin-top: 16px; font-size: 13px; color: var(--muted); }
.footer .beian a { color: var(--muted); text-decoration: none; border-bottom: 1px solid transparent; transition: .2s; }
.footer .beian a:hover { color: var(--orange); border-bottom-color: var(--orange); }

@media (max-width: 600px) {
  .topbar { padding: 12px 16px; }
  .row { flex-direction: column; gap: 0; }
}