/* mc.duperdition.com 下载站 —— 落地页样式
   约定：不引任何外部资源（字体、图片、CDN 一律没有）；图标都是内联 SVG。 */

:root {
  --bg:        #f5f6f8;
  --surface:   #ffffff;
  --ink:       #1b1f27;
  --ink-soft:  #4a5160;
  --faint:     #6b7280;
  --line:      #e6e8ec;
  --accent:    #2f6fed;
  --accent-dk: #1f56c9;
  --danger:    #b42318;
  --danger-bg: #fef3f2;
  --ok:        #067647;
  --ok-bg:     #ecfdf3;
  --radius:    12px;
  --shadow:    0 1px 2px rgba(16, 24, 40, .05), 0 1px 3px rgba(16, 24, 40, .06);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans SC",
               "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.page {
  width: min(100% - 2rem, 34rem);
  margin-inline: auto;
  padding: clamp(1.75rem, 6vw, 3.25rem) 0 2.5rem;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

.muted { color: var(--faint); font-weight: 400; }

/* ---- 页头 ---- */

.masthead { margin-bottom: 1.5rem; }

.mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  margin-bottom: .85rem;
}

.masthead h1 {
  font-size: clamp(1.35rem, 6vw, 1.7rem);
  line-height: 1.3;
  margin: 0 0 .4rem;
  letter-spacing: -0.01em;
}

.tagline { margin: 0; color: var(--ink-soft); }

/* ---- 卡片 ---- */

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.15rem 1.15rem 1.25rem;
  margin-bottom: 1rem;
}

.card h2 {
  font-size: .95rem;
  font-weight: 600;
  margin: 0 0 .75rem;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: .5rem;
}

.ver-chip {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .75rem;
  font-weight: 500;
  color: var(--accent);
  background: color-mix(in oklab, var(--accent) 10%, #fff);
  border-radius: 999px;
  padding: .1rem .5rem;
}

/* ---- 版本信息 ---- */

.meta { margin: 0; }

.meta-row {
  display: flex;
  gap: .75rem;
  padding: .4rem 0;
  border-bottom: 1px solid var(--line);
}

.meta-row:last-child { border-bottom: none; padding-bottom: 0; }

.meta dt {
  flex: 0 0 4.25rem;
  color: var(--faint);
  font-size: .875rem;
}

.meta dd {
  margin: 0;
  min-width: 0;
  overflow-wrap: anywhere;
}

.meta dd .muted { font-size: .8125rem; margin-left: .35rem; }

/* ---- 更新说明 ---- */

.notes { margin: 0; padding-left: 1.15rem; }

.notes li { margin-bottom: .3rem; }
.notes li:last-child { margin-bottom: 0; }

/* ---- 下载区 ---- */

.lede { margin: 0 0 1rem; color: var(--ink-soft); }

.actions { display: flex; flex-wrap: wrap; gap: .6rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  font: inherit;
  font-size: .9375rem;
  font-weight: 500;
  line-height: 1;
  padding: .65rem 1.05rem;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
  -webkit-tap-highlight-color: transparent;
}

.btn:hover:not(:disabled) { border-color: #d3d7de; background: #fafbfc; }

.btn:disabled { opacity: .55; cursor: default; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-primary:hover:not(:disabled) { background: var(--accent-dk); border-color: var(--accent-dk); }

.btn-small { padding: .45rem .7rem; font-size: .8125rem; }

.btn-ghost { color: var(--faint); }

/* ---- 状态提示 ---- */

.status {
  margin-top: .9rem;
  padding: .6rem .8rem;
  border-radius: 9px;
  font-size: .875rem;
  background: #f2f4f7;
  color: var(--ink-soft);
}

.status-error { background: var(--danger-bg); color: var(--danger); }
.status-ok    { background: var(--ok-bg);     color: var(--ok); }

/* ---- 授权码面板 ---- */

.code-panel {
  margin-top: 1rem;
  padding: .9rem 1rem;
  border: 1px dashed color-mix(in oklab, var(--accent) 35%, var(--line));
  border-radius: 10px;
  background: color-mix(in oklab, var(--accent) 4%, #fff);
}

.label {
  margin: 0 0 .4rem;
  font-size: .8125rem;
  color: var(--faint);
}

.code-line { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }

.code {
  font-size: clamp(1rem, 4.4vw, 1.2rem);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.hint { margin: .5rem 0 0; font-size: .8125rem; color: var(--faint); }

/* ---- 文件列表 ---- */

.downloads { margin-top: 1.1rem; }

.download-list { list-style: none; margin: 0; padding: 0; }

.download-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .55rem 0;
  border-bottom: 1px solid var(--line);
}

.download-item:last-child { border-bottom: none; }

.download-link {
  color: var(--accent);
  text-decoration: none;
  overflow-wrap: anywhere;
  min-width: 0;
}

.download-link:hover { text-decoration: underline; text-underline-offset: .2em; }

.download-size { color: var(--faint); font-size: .8125rem; white-space: nowrap; }

/* ---- 分隔与已有授权码 ---- */

.sep {
  border: none;
  border-top: 1px solid var(--line);
  margin: 1.35rem 0 1.1rem;
}

.unlock label {
  display: block;
  font-size: .875rem;
  color: var(--ink-soft);
  margin-bottom: .45rem;
}

.unlock-row { display: flex; gap: .55rem; }

.unlock-row input {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 1rem;
  padding: .6rem .7rem;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  color: var(--ink);
  text-transform: uppercase;
}

.unlock-row input::placeholder { text-transform: none; color: #a9b0bd; }

.unlock-row input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 18%, transparent);
}

.unlock-row .btn { flex: 0 0 auto; background: var(--surface); }

/* ---- 页脚（与门面页保持一致的观感）---- */

.icp-footer {
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: .75rem;
  line-height: 1.9;
  letter-spacing: .02em;
  color: var(--faint);
}

.icp-footer a {
  display: block;
  width: fit-content;
  margin-inline: auto;
  color: inherit;
  text-decoration: none;
  text-underline-offset: .25em;
  transition: color 120ms ease;
}

.icp-footer a:hover { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; }

.icp-footer img { vertical-align: -.25em; margin-right: .45em; }

/* ---- 无障碍 / 打印 ---- */

a:focus-visible,
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

::selection { background: var(--accent); color: #fff; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

@media print {
  body { background: #fff; color: #000; }
  .card { box-shadow: none; border-color: #ccc; }
  .icp-footer { color: #333; }
}