:root {
  --ink: #1b1d21;
  --ink-2: #4a5058;
  --ink-3: #666d76;
  --line: #dfe2e6;
  --line-2: #eceef1;
  --bg: #f6f7f9;
  --card: #ffffff;
  --blue: #004888;
  --blue-dark: #003465;
  --blue-soft: #eef3f9;
  --warn: #8a5a00;
  --warn-bg: #fdf6e7;
  --danger: #9b2226;
  --danger-bg: #fdf0f0;
  --ok: #1f6f43;
  --radius: 8px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans CJK SC",
    "Source Han Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

.wrap { width: 100%; max-width: 880px; margin: 0 auto; padding: 0 20px; }
.hidden { display: none !important; }

/* ---------- 顶栏 ---------- */
.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 58px;
}
.brand { display: flex; align-items: center; gap: 9px; font-weight: 600; letter-spacing: .3px; }
.dot { width: 9px; height: 9px; background: var(--blue); border-radius: 2px; display: inline-block; }
.nav { display: flex; align-items: center; gap: 14px; }
.nav-link {
  color: var(--blue);
  text-decoration: none;
  font-size: 14px;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}
.nav-link:hover { border-bottom-color: var(--blue); }
.user-box { display: flex; align-items: center; gap: 10px; }
.user-name { font-size: 13px; color: var(--ink-2); }

/* ---------- 布局 ---------- */
.main { padding: 28px 20px 40px; }
.hero { margin-bottom: 22px; }
.hero h1 { font-size: 22px; margin: 0 0 8px; font-weight: 600; letter-spacing: .2px; }
.lede { margin: 0; color: var(--ink-2); font-size: 14px; }
.lede strong { color: var(--ink); font-weight: 600; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 18px;
}
.card-title { font-size: 16px; font-weight: 600; margin: 0 0 12px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.card-head .card-title { margin-bottom: 0; }
.card-info { background: #fbfbfc; }
.card-result { border-color: #c9d6e4; }

/* ---------- 表单 ---------- */
.form { display: flex; flex-direction: column; gap: 16px; }
.field { display: block; }
.label { display: block; font-size: 13px; color: var(--ink-2); margin-bottom: 6px; }
input[type="text"], input[type="password"], textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  background: #fff;
  outline: none;
}
input[type="text"]:focus, input[type="password"]:focus, textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(0, 72, 136, .18);
}
/* 键盘可见焦点环：输入框、按钮、链接都保留清晰的可聚焦指示 */
input:focus-visible, textarea:focus-visible, .btn:focus-visible, a:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}
textarea { resize: vertical; min-height: 120px; }
.counter { display: block; text-align: right; font-size: 12px; color: var(--ink-3); margin-top: 4px; }
.hint { font-size: 13px; color: var(--ink-3); margin: 10px 0 0; }

.pin-input {
  letter-spacing: .42em;
  font-size: 24px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  text-align: center;
  text-transform: uppercase;
  padding: 14px 12px !important;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: 1px solid transparent;
  padding: 10px 18px;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.2;
  white-space: nowrap;
}
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.progress-text { font-size: 13px; color: var(--ink-3); }

/* ---------- 文件区 ---------- */
.dropzone {
  position: relative;
  border: 1px dashed #c3c9d1;
  border-radius: 6px;
  padding: 22px;
  text-align: center;
  background: #fbfcfd;
  cursor: pointer;
}
.dropzone.dragover { border-color: var(--blue); background: var(--blue-soft); }
.file-input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }
.dz-text { margin: 0; font-size: 14px; color: var(--ink-2); }
.dz-hint { margin: 6px 0 0; font-size: 12px; color: var(--ink-3); }
.file-list { list-style: none; padding: 0; margin: 12px 0 0; }
.file-list li {
  display: flex; justify-content: space-between; gap: 10px;
  font-size: 13px; padding: 6px 0; border-bottom: 1px solid var(--line-2);
  color: var(--ink-2);
}
.file-list li:last-child { border-bottom: none; }
.file-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- 取件码展示 ---------- */
.pin-box {
  background: var(--blue-soft);
  border: 1px solid #cfdcea;
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
  margin-bottom: 16px;
}
.pin-label { font-size: 12px; color: var(--ink-2); letter-spacing: .1em; }
.pin-value {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 40px;
  font-weight: 600;
  letter-spacing: .22em;
  color: var(--blue);
  margin: 8px 0 14px;
  word-break: break-all;
}
.pin-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

.meta-list, .info-list { margin: 0; padding-left: 20px; font-size: 14px; color: var(--ink-2); }
.meta-list li, .info-list li { margin: 5px 0; }
.meta-list strong { color: var(--ink); }

/* ---------- 提醒 ---------- */
.alert {
  border-radius: 6px;
  padding: 12px 14px;
  font-size: 14px;
  margin-bottom: 18px;
  border: 1px solid;
}
.alert.error { background: var(--danger-bg); border-color: #f0c9c9; color: var(--danger); }
.alert.warn { background: var(--warn-bg); border-color: #f0e0bd; color: var(--warn); }
.alert.ok { background: #f0f7f2; border-color: #cbe3d4; color: var(--ok); }

.badge {
  font-size: 12px;
  color: var(--ink-2);
  background: #f1f3f5;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 10px;
}
.badge-warn { background: var(--warn-bg); border-color: #f0e0bd; color: var(--warn); }

/* ---------- 取件内容 ---------- */
.text-block { margin-bottom: 20px; }
.text-block-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.text-content {
  margin: 0;
  background: #fbfbfc;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px;
  font-size: 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 420px;
  overflow: auto;
}
.download-list { list-style: none; padding: 0; margin: 8px 0 0; }
.download-list li {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; margin-bottom: 8px;
}
.dl-meta { min-width: 0; }
.dl-name { font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dl-size { font-size: 12px; color: var(--ink-3); }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 16px 0 26px;
  font-size: 12px;
  color: var(--ink-3);
  text-align: center;
  background: var(--card);
}

@media (max-width: 560px) {
  .pin-value { font-size: 32px; letter-spacing: .16em; }
  .card { padding: 18px; }
  .main { padding: 20px 14px 32px; }
  .wrap { padding: 0 14px; }
}