/* download.leyoulexue.cn 下载站样式（与 www 同设计语言：品牌蓝 #00A0D2 + 低饱和暖中性色） */
:root {
  --brand: #00A0D2;
  --brand-dark: #0086b3;
  --ink: #0B1E3F;
  --ink-2: #163A6B;
  --warm-bg: #faf8f5;
  --card-bg: #ffffff;
  --line: #e8e2d9;
  --text: #334155;
  --muted: #64748b;
  --ok: #166534;
  --ok-bg: #f0fdf4;
  --warn: #b45309;
  --warn-bg: #fffbeb;
  --radius: 14px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--warm-bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--brand); text-decoration: none; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

/* 顶部导航 */
.nav {
  background: linear-gradient(135deg, #0B1E3F 0%, #0F2B52 40%, #163A6B 100%);
  padding: 14px 0;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo img { height: 36px; }
.nav-logo span { color: #fff; font-weight: 600; font-size: 17px; }
.nav-links { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.nav-links a { color: rgba(255,255,255,.85); font-size: 14px; }
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: #FFD700; font-weight: 600; }

/* Hero */
.hero {
  background: linear-gradient(135deg, #0B1E3F 0%, #0F2B52 40%, #163A6B 100%);
  color: #fff; text-align: center; padding: 44px 16px 40px;
}
.hero h1 { font-size: 28px; margin-bottom: 10px; }
.hero p { color: rgba(255,255,255,.75); font-size: 14px; max-width: 640px; margin: 0 auto; }
.hero .hero-logo { height: 72px; margin-bottom: 14px; filter: drop-shadow(0 6px 16px rgba(0,160,210,.4)); }

/* 筛选条 */
.filters {
  background: var(--card-bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; margin: -24px auto 20px; position: relative; z-index: 2;
  display: flex; flex-wrap: wrap; gap: 10px 22px; align-items: center;
  box-shadow: 0 6px 24px rgba(11,30,63,.06);
}
.filter-group { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.filter-group .label { font-size: 13px; color: var(--muted); }
.chip {
  border: 1px solid var(--line); background: #f8fafc; color: var(--text);
  border-radius: 999px; padding: 4px 14px; font-size: 13px; cursor: pointer;
  transition: all .15s;
}
.chip:hover { border-color: var(--brand); color: var(--brand); }
.chip.active { background: var(--brand); border-color: var(--brand); color: #fff; }

/* 产品网格 */
.grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  padding-bottom: 24px;
}
.card {
  background: var(--card-bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; display: flex; flex-direction: column; gap: 10px;
  transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: 0 8px 24px rgba(11,30,63,.08); transform: translateY(-2px); }
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.card h3 { font-size: 16px; color: var(--ink); }
.pid-tag {
  font-family: monospace; font-size: 12px; background: #e6f7fc; color: var(--brand-dark);
  border-radius: 6px; padding: 2px 8px; white-space: nowrap;
}
.meta { font-size: 13px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; }
.meta .row { display: flex; justify-content: space-between; gap: 8px; }
.meta .val { font-family: monospace; font-size: 12px; color: var(--text); word-break: break-all; text-align: right; }
.meta .fallback-note { color: var(--warn); font-size: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  background: var(--brand); color: #fff; border: none; border-radius: 10px;
  padding: 10px 16px; font-size: 14px; cursor: pointer; transition: background .15s;
}
.btn:hover { background: var(--brand-dark); }
.btn-ghost {
  background: #f8fafc; color: var(--text); border: 1px solid var(--line);
}
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); background: #fff; }
.btn-sm { padding: 6px 12px; font-size: 13px; border-radius: 8px; }
.btn[disabled] { opacity: .55; cursor: not-allowed; }
.card-actions { display: flex; gap: 8px; margin-top: auto; flex-wrap: wrap; }

/* MD5 下载前确认弹层 */
.md5-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 100;
  display: none; align-items: center; justify-content: center; padding: 16px;
}
.md5-overlay.show { display: flex; }
.md5-dialog {
  background: #fff; border-radius: 16px; max-width: 520px; width: 100%;
  padding: 24px; box-shadow: 0 20px 60px rgba(0,0,0,.25);
}
.md5-dialog h3 { color: var(--ink); margin-bottom: 8px; }
.md5-box {
  background: #f8fafc; border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 14px; font-family: monospace; font-size: 13px; word-break: break-all;
  margin: 12px 0;
}
.md5-tip { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.md5-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* 自检矩阵 */
.selfcheck { margin: 8px 0 28px; }
.selfcheck summary {
  cursor: pointer; font-size: 14px; color: var(--muted); user-select: none;
  padding: 10px 4px;
}
.selfcheck-legend { display: flex; gap: 16px; font-size: 12px; color: var(--muted); margin: 8px 0; flex-wrap: wrap; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 4px; vertical-align: -1px; }
.dot.ok { background: #22c55e; }
.dot.bad { background: #e2e8f0; }
.dot.loading { background: #fbbf24; }
.selfcheck table { border-collapse: collapse; width: 100%; font-size: 12px; background: #fff; border-radius: 10px; overflow: hidden; }
.selfcheck th, .selfcheck td { border: 1px solid var(--line); padding: 5px 8px; text-align: center; }
.selfcheck th { background: #f8fafc; color: var(--muted); font-weight: 500; }
.selfcheck td.pid { font-family: monospace; text-align: left; }
.st-ok { color: var(--ok); }
.st-bad { color: var(--muted); }
.st-loading { color: var(--warn); }
.selfcheck .summary-line { font-size: 13px; color: var(--muted); margin: 6px 0; }

/* 说明区块 */
.section { margin: 26px 0; }
.section h2 { font-size: 19px; color: var(--ink); margin-bottom: 12px; }
.panel {
  background: var(--card-bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 20px; font-size: 14px;
}
.panel ol, .panel ul { padding-left: 20px; }
.panel li { margin: 6px 0; }
.req-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.req-item { background: #f8fafc; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; font-size: 13px; }
.req-item b { color: var(--ink); display: block; margin-bottom: 2px; }

/* 页脚 */
.footer {
  background: var(--ink); color: rgba(255,255,255,.65);
  text-align: center; padding: 26px 16px; font-size: 13px; margin-top: 40px;
}
.footer a { color: rgba(255,255,255,.85); }

.toast-tip {
  position: fixed; bottom: 60px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: #fff; padding: 10px 20px; border-radius: 10px;
  font-size: 14px; opacity: 0; transition: all .3s; z-index: 300; pointer-events: none; max-width: 86vw;
}
.toast-tip.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 640px) {
  .hero h1 { font-size: 22px; }
  .filters { margin: -20px 12px 16px; }
  .grid { grid-template-columns: 1fr; }
}