/* ============================================================
   轻享实验室 · 站点样式
   ============================================================ */
:root {
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --bg-card: #ffffff;
  --border: #e8eaed;
  --border-strong: #d7dbe0;
  --text: #1a1d21;
  --text-soft: #5f6672;
  --text-mute: #8b929c;
  --accent: #2563eb;
  --accent-soft: #eff4ff;
  --accent-hover: #1d4ed8;
  --green: #16a34a;
  --green-soft: #ecfdf3;
  --amber: #d97706;
  --amber-soft: #fffbeb;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .05);
  --shadow: 0 4px 16px rgba(16, 24, 40, .07);
  --shadow-lg: 0 12px 36px rgba(16, 24, 40, .10);
  --maxw: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  font-size: 15px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------------- 导航 ---------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  height: 60px; display: flex; align-items: center; gap: 28px;
}
.brand {
  display: flex; align-items: center; gap: 9px;
  font-weight: 700; font-size: 16.5px; color: var(--text);
  letter-spacing: -.2px;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 28px; height: 28px; border-radius: 8px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  display: grid; place-items: center; color: #fff;
  font-size: 14px; font-weight: 800;
}
.nav-links { display: flex; gap: 22px; margin-left: auto; }
.nav-links a {
  color: var(--text-soft); font-size: 14px; font-weight: 500;
}
.nav-links a:hover { color: var(--accent); text-decoration: none; }

/* ---------------- Hero ---------------- */
.hero {
  padding: 74px 0 58px;
  background:
    radial-gradient(900px 400px at 15% -10%, #eef3ff 0%, transparent 60%),
    radial-gradient(700px 380px at 88% 4%, #f5efff 0%, transparent 58%);
  border-bottom: 1px solid var(--border);
}
.hero h1 {
  font-size: 40px; line-height: 1.2; font-weight: 800;
  letter-spacing: -1.1px; margin-bottom: 14px;
}
.hero h1 .grad {
  background: linear-gradient(100deg, #2563eb, #7c3aed 70%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.lead {
  font-size: 17px; color: var(--text-soft); max-width: 620px;
}

/* ---------------- 产品卡片（首页） ---------------- */
.section { padding: 52px 0; }
.section-head { margin-bottom: 26px; }
.section-head h2 {
  font-size: 23px; font-weight: 750; letter-spacing: -.5px;
}
.section-head p { color: var(--text-soft); font-size: 14.5px; margin-top: 4px; }

.product-grid {
  display: grid; gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}
.product-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px;
  transition: box-shadow .22s, transform .22s, border-color .22s;
  display: flex; flex-direction: column;
}
.product-card:hover {
  box-shadow: var(--shadow-lg); transform: translateY(-3px);
  border-color: var(--border-strong);
}
.pc-top { display: flex; align-items: center; gap: 13px; margin-bottom: 15px; }
.pc-logo {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center; font-size: 20px; font-weight: 800;
  color: #fff; flex-shrink: 0;
}
.pc-logo.litejoy { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.pc-logo.dp { background: linear-gradient(135deg, #2563eb, #06b6d4); }
.pc-title { font-size: 18.5px; font-weight: 700; letter-spacing: -.3px; }
.pc-sub { font-size: 13px; color: var(--text-mute); }
.product-card .desc {
  color: var(--text-soft); font-size: 14.5px; margin-bottom: 18px;
  flex: 1;
}
.pc-meta {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px;
}
.chip {
  font-size: 12px; padding: 3.5px 10px; border-radius: 20px;
  background: var(--bg-soft); color: var(--text-soft);
  border: 1px solid var(--border);
  font-weight: 500;
}
.chip.ver { background: var(--accent-soft); color: var(--accent); border-color: #d9e6ff; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 7px; padding: 10px 20px; border-radius: var(--radius-sm);
  font-size: 14.5px; font-weight: 600; cursor: pointer;
  border: 1px solid transparent; transition: all .18s;
  font-family: inherit; white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost {
  background: #fff; color: var(--text); border-color: var(--border-strong);
}
.btn-ghost:hover { background: var(--bg-soft); border-color: #c3c9d1; }
.btn-block { width: 100%; }
.btn[aria-disabled="true"] {
  background: var(--bg-soft); color: var(--text-mute);
  border-color: var(--border); cursor: not-allowed; pointer-events: none;
}

/* ---------------- 产品详情页 ---------------- */
.app-header {
  padding: 52px 0 44px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg-soft), #fff);
}
.app-header-top { display: flex; align-items: flex-start; gap: 20px; }
.app-logo-lg {
  width: 72px; height: 72px; border-radius: 18px;
  display: grid; place-items: center; font-size: 30px; font-weight: 800;
  color: #fff; flex-shrink: 0; box-shadow: var(--shadow);
}
.app-logo-lg.litejoy { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.app-logo-lg.dp { background: linear-gradient(135deg, #2563eb, #06b6d4); }
.app-header h1 {
  font-size: 31px; font-weight: 800; letter-spacing: -.8px; margin-bottom: 5px;
}
.app-header .sub { color: var(--text-soft); font-size: 16px; }
.app-header .actions { margin-top: 20px; display: flex; gap: 10px; flex-wrap: wrap; }

/* 详情网格 */
.detail-grid {
  display: grid; grid-template-columns: 1fr 330px; gap: 32px;
  padding: 42px 0 60px; align-items: start;
}
@media (max-width: 880px) {
  .detail-grid { grid-template-columns: 1fr; }
}

/* 特性列表 */
.feature-list {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-bottom: 36px;
}
.feature {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; background: var(--bg-card);
}
.feature .fi {
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--accent-soft); color: var(--accent);
  display: grid; place-items: center; margin-bottom: 11px;
}
.feature h4 { font-size: 15px; font-weight: 650; margin-bottom: 4px; }
.feature p { font-size: 13.5px; color: var(--text-soft); }

/* 下载面板 */
.dl-panel {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-card); padding: 22px;
  position: sticky; top: 80px; box-shadow: var(--shadow-sm);
}
.dl-panel h3 {
  font-size: 15px; font-weight: 700; margin-bottom: 4px;
  display: flex; align-items: center; gap: 8px;
}
.dl-panel .pn-sub {
  font-size: 12.5px; color: var(--text-mute); margin-bottom: 16px;
}
.dl-item {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 14px; margin-bottom: 10px; background: var(--bg-soft);
}
.dl-item-head {
  display: flex; align-items: center; gap: 9px; margin-bottom: 3px;
}
.dl-os { font-size: 14.5px; font-weight: 650; }
.dl-file {
  font-size: 11.5px; color: var(--text-mute);
  font-family: Consolas, "SF Mono", monospace;
  word-break: break-all; margin-bottom: 10px;
}
.dl-note {
  font-size: 12px; color: var(--amber); background: var(--amber-soft);
  border: 1px solid #fde68a; border-radius: 7px;
  padding: 9px 11px; margin-top: 4px; line-height: 1.5;
}
.dl-foot {
  font-size: 12px; color: var(--text-mute); margin-top: 14px;
  padding-top: 13px; border-top: 1px solid var(--border);
}

/* ---------------- 更新日志 ---------------- */
.releases-head {
  display: flex; align-items: baseline; gap: 12px;
  margin-bottom: 20px; flex-wrap: wrap;
}
.releases-head h2 { font-size: 21px; font-weight: 750; letter-spacing: -.4px; }
.releases-head .cnt { font-size: 13px; color: var(--text-mute); }

.release {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-card); margin-bottom: 14px; overflow: hidden;
  transition: border-color .2s, box-shadow .2s;
}
.release:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.release.highlight { border-color: #c7d9ff; box-shadow: 0 0 0 3px var(--accent-soft); }
.rel-head {
  padding: 17px 20px; display: flex; align-items: center; gap: 11px;
  flex-wrap: wrap; cursor: pointer; user-select: none;
}
.rel-v {
  font-size: 16.5px; font-weight: 750; font-family: Consolas, monospace;
  letter-spacing: -.3px;
}
.rel-title { font-size: 14px; color: var(--text-soft); font-weight: 500; }
.rel-date { font-size: 12.5px; color: var(--text-mute); margin-left: auto; }
.badge {
  font-size: 11px; padding: 2.5px 9px; border-radius: 20px;
  font-weight: 650; letter-spacing: .2px;
}
.badge.new { background: var(--accent-soft); color: var(--accent); }
.badge.stable { background: var(--green-soft); color: var(--green); }
.badge.beta { background: var(--amber-soft); color: var(--amber); }

.rel-body {
  padding: 0 20px 18px 20px; border-top: 1px solid var(--border);
  padding-top: 15px;
}
.rel-body ul { list-style: none; padding: 0; }
.rel-body li {
  font-size: 14px; color: var(--text-soft); padding-left: 20px;
  position: relative; margin-bottom: 7px;
}
.rel-body li::before {
  content: ""; position: absolute; left: 6px; top: 9px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--accent);
}
.rel-dl {
  display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px;
  padding-top: 14px; border-top: 1px dashed var(--border);
}
.rel-dl .btn { padding: 7px 15px; font-size: 13px; }

/* ---------------- 页脚 ---------------- */
.footer {
  border-top: 1px solid var(--border); background: var(--bg-soft);
  padding: 30px 0; margin-top: 20px;
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: var(--text-mute);
}

/* ---------------- 加载态 ---------------- */
.skeleton {
  background: linear-gradient(90deg, #f0f2f5 25%, #f7f8fa 50%, #f0f2f5 75%);
  background-size: 200% 100%; animation: sk 1.3s infinite;
  border-radius: 8px;
}
@keyframes sk { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

.empty-state {
  text-align: center; padding: 50px 20px; color: var(--text-mute);
  font-size: 14.5px;
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 640px) {
  .hero { padding: 50px 0 40px; }
  .hero h1 { font-size: 30px; }
  .app-header h1 { font-size: 25px; }
  .app-header-top { flex-direction: column; gap: 14px; }
  .rel-date { margin-left: 0; width: 100%; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 13px; }
}

/* ================= 单软件官网 补充样式 ================= */

/* 锚点：避开顶部固定导航 */
.sec-anchor { scroll-margin-top: 78px; }

.app-hd-main { min-width: 0; }

/* 区块标题与段落 */
.blk-title {
  font-size: 21px; font-weight: 750; letter-spacing: -.4px;
  margin-bottom: 13px;
}
.blk-p {
  color: var(--text-soft); font-size: 15px; margin-bottom: 11px;
}
.blk-p:last-child { margin-bottom: 0; }

.mt-lg { margin-top: 40px; }
.mt-md { margin-top: 16px; }

/* 亮点清单 */
.hl-list {
  list-style: none; padding: 0; margin: 20px 0 0;
  display: grid; gap: 9px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.hl-list li {
  display: flex; align-items: flex-start; gap: 9px;
  font-size: 14.5px; color: var(--text-soft);
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 11px 13px;
}
.hl-list li svg {
  color: var(--green); flex-shrink: 0; margin-top: 4px;
}

/* 下载项内的 SHA 提示 */
.dl-sha {
  font-size: 10.5px; color: var(--text-mute);
  font-family: Consolas, "SF Mono", monospace;
  margin-top: 8px; letter-spacing: .2px;
  word-break: break-all;
  cursor: help;
}
.dl-os-ico {
  color: var(--text-soft); display: grid; place-items: center;
  flex-shrink: 0;
}
.dl-item-head { margin-bottom: 4px; }

/* 版本日期带时钟图标 */
.rel-date {
  display: inline-flex; align-items: center; gap: 5px;
}

/* 折叠历史版本时的过渡 */
.release { transition: border-color .2s, box-shadow .2s; }

/* 下载面板在无下载项时的留白优化 */
.dl-panel .dl-foot:empty { display: none; }

/* 详情页两栏在窄屏下的间距 */
@media (max-width: 880px) {
  .detail-grid { gap: 26px; }
  .dl-panel { position: static; }
}

/* 打印友好（便于用户存档） */
@media print {
  .nav, .footer, .dl-panel .btn, .rel-dl, #toggle-rel { display: none !important; }
  .detail-grid { grid-template-columns: 1fr; }
}