/* ============================================================
   NextWindows 系统下载站 —— 前台样式
   布局仿 msdn.sjjzm.com：左侧固定深色栏 + 右侧内容区
   ============================================================ */
:root {
  --side-w: 220px;
  --primary: #1f6feb;
  --primary-dark: #1958c4;
  --side-bg: #1c2330;
  --side-bg2: #161c27;
  --text: #2b2f38;
  --text-soft: #6b7280;
  --line: #e8ebf0;
  --bg: #f3f5f9;
  --card: #ffffff;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(20, 30, 50, .06), 0 6px 18px rgba(20, 30, 50, .05);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

/* ---------- 布局骨架 ---------- */
.layout { display: flex; min-height: 100vh; }

/* ---------- 左侧栏 ---------- */
.side {
  width: var(--side-w);
  flex: 0 0 var(--side-w);
  background: linear-gradient(180deg, var(--side-bg) 0%, var(--side-bg2) 100%);
  color: #cdd3df;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 30;
}
.logo {
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 22px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .5px;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.logo .dot { color: var(--primary); }
.nav { overflow-y: auto; padding: 10px 0; flex: 1; }
.nav ul { list-style: none; margin: 0; padding: 0; }
.nav li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 22px;
  color: #aeb6c4;
  font-size: 14.5px;
  border-left: 3px solid transparent;
  transition: .15s;
}
.nav li a:hover { background: rgba(255, 255, 255, .05); color: #fff; }
.nav li.active a {
  background: rgba(31, 111, 235, .16);
  color: #fff;
  border-left-color: var(--primary);
}
.nav li a .ic { width: 8px; height: 8px; border-radius: 2px; background: currentColor; opacity: .5; }
.side-foot { padding: 14px 22px; font-size: 12px; color: #6c7689; border-top: 1px solid rgba(255, 255, 255, .06); }

/* ---------- 右侧主区 ---------- */
.main { margin-left: var(--side-w); flex: 1; min-width: 0; display: flex; flex-direction: column; }
.header {
  height: 64px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 20;
}
.header .crumb { font-size: 15px; font-weight: 600; }
.header .crumb small { color: var(--text-soft); font-weight: 400; margin-left: 8px; }
.header .tools { display: flex; gap: 18px; align-items: center; }
.header .tools a { color: var(--text-soft); font-size: 13.5px; }
.header .tools a:hover { color: var(--primary); }
.header .tools .muted-tip { color: var(--text-soft); font-size: 13px; }
.header .tools .admin-link {
  background: var(--primary);
  color: #fff;
  padding: 6px 14px;
  border-radius: 6px;
}
.header .tools .admin-link:hover { background: var(--primary-dark); color: #fff; }
.menu-btn { display: none; }

.container { padding: 22px 24px 60px; }

/* ---------- 站点提示条 ---------- */
.notice {
  background: #eef4ff;
  border: 1px solid #d6e4ff;
  color: #29508c;
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 13px;
  margin-bottom: 18px;
}

/* ---------- 版本子菜单 ---------- */
.submenu { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.submenu a {
  padding: 6px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  color: var(--text-soft);
  font-size: 13px;
  transition: .15s;
}
.submenu a:hover { border-color: var(--primary); color: var(--primary); }
.submenu a.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---------- 镜像卡片 ---------- */
.cards { display: flex; flex-direction: column; gap: 16px; }
.box {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.box .name {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px 12px;
}
.box .name h1 { font-size: 16px; font-weight: 700; margin: 0; color: #1b2430; }
.box .name .toggle { color: var(--primary); font-size: 13px; cursor: pointer; user-select: none; white-space: nowrap; }
.box .tag { display: flex; flex-wrap: wrap; gap: 7px; padding: 0 20px 14px; }
.box .tag span {
  font-size: 12px;
  padding: 2px 9px;
  border-radius: 4px;
  background: #f0f2f6;
  color: var(--text-soft);
}
.box .tag .bit { background: #e8f0ff; color: var(--primary); font-weight: 600; }
.box .tag .lang { background: #eaf7ee; color: #1f9d54; }
.box .tag .date { background: #fff3e6; color: #d97912; }

.detail { border-top: 1px dashed var(--line); padding: 14px 20px 18px; }
.detail.collapsed { display: none; }

/* 参数表 */
table.param { width: 100%; border-collapse: collapse; margin-bottom: 14px; font-size: 13px; }
table.param td { padding: 7px 10px; border: 1px solid var(--line); vertical-align: top; }
table.param .param-name { width: 92px; background: #f7f8fb; color: var(--text-soft); white-space: nowrap; }
table.param .param-value { word-break: break-all; font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; font-size: 12.5px; }

/* 下载链接区 */
.download { display: flex; flex-direction: column; gap: 10px; }
.dl-row { display: flex; flex-wrap: wrap; gap: 10px; }
.dl-item { flex: 1 1 320px; display: flex; align-items: stretch; min-width: 0; }
.dl-item.pass { flex: 0 0 170px; }
.dl-label {
  flex: 0 0 96px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12.5px;
  color: #fff;
  border-radius: 6px 0 0 6px;
  padding: 0 6px;
  text-align: center;
  line-height: 1.2;
}
.dl-input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--line);
  border-left: none;
  border-right: none;
  padding: 8px 10px;
  font-size: 13px;
  background: #fbfcfe;
  color: #333;
  outline: none;
  font-family: "SFMono-Regular", Consolas, monospace;
}
.dl-copy {
  flex: 0 0 auto;
  border: none;
  background: #e8ebf0;
  color: var(--text);
  padding: 0 16px;
  font-size: 13px;
  cursor: pointer;
  border-radius: 0;
  transition: .15s;
}
.dl-copy:hover { background: #d7dce3; }
.dl-open {
  flex: 0 0 auto;
  margin-left: 12px;
  border: none;
  background: #e8ebf0;
  color: var(--text);
  padding: 0 14px;
  font-size: 13px;
  cursor: pointer;
  border-radius: 0;
  transition: .15s;
}
.dl-open:hover { background: #d7dce3; }

/* 空状态 */
.empty { text-align: center; padding: 80px 20px; color: var(--text-soft); }
.empty .big { font-size: 48px; margin-bottom: 10px; }

/* 页脚 */
.foot { text-align: center; color: var(--text-soft); font-size: 12.5px; padding: 26px 20px; }

/* Toast 提示 */
.toast {
  position: fixed;
  left: 50%;
  bottom: 40px;
  transform: translateX(-50%) translateY(20px);
  background: rgba(20, 26, 38, .95);
  color: #fff;
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: .25s;
  z-index: 999;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* 加载态 */
.loading { text-align: center; padding: 100px 20px; color: var(--text-soft); }

/* ---------- 移动端 ---------- */
.mask { display: none; }
@media (max-width: 860px) {
  :root { --side-w: 0px; }
  .side {
    width: 240px;
    flex-basis: 240px;
    transform: translateX(-100%);
    transition: transform .25s;
  }
  body.nav-open .side { transform: translateX(0); }
  body.nav-open .mask {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .4);
    z-index: 25;
  }
  .main { margin-left: 0; }
  .menu-btn {
    display: flex;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: 6px;
  }
  .menu-btn span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; }
  .dl-item, .dl-item.pass { flex: 1 1 100%; }
}