:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1a1a2e;
  --muted: #777;
  --border: rgba(0, 0, 0, 0.08);
  --accent: #4f6ef7;
  --accent-hover: #3d5ae8;
  --danger: #e5484d;
  --radius: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101014;
    --card: #1b1b22;
    --text: #ececf1;
    --muted: #8b8b96;
    --border: rgba(255, 255, 255, 0.1);
    --accent: #6c84ff;
    --accent-hover: #8197ff;
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100svh;
  display: flex;
  flex-direction: column;
}

header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
}
.logo span { color: var(--accent); }

nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
  margin-left: 16px;
}
nav a.primary { color: var(--accent); font-weight: 600; }

main.page {
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
}

main.narrow { max-width: 440px; }

.hero {
  text-align: center;
  padding: 64px 0 40px;
}
.hero h1 { font-size: clamp(28px, 5vw, 44px); line-height: 1.25; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.sub { margin-top: 16px; color: var(--muted); font-size: 16px; }
.hero .cta { margin-top: 32px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 24px;
}
.feature {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
}
.feature h3 { font-size: 16px; margin-bottom: 8px; }
.feature p { font-size: 14px; color: var(--muted); line-height: 1.6; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
}

h2.title { font-size: 22px; margin-bottom: 20px; text-align: center; }

label { display: block; font-size: 13px; color: var(--muted); margin: 16px 0 6px; }

input[type="email"],
input[type="password"] {
  width: 100%;
  padding: 12px 14px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  outline: none;
}
input:focus { border-color: var(--accent); }

button, .btn {
  display: inline-block;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: background 0.15s;
}
button:hover, .btn:hover { background: var(--accent-hover); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.btn.ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn.block, button.block { width: 100%; margin-top: 24px; }

.candidates {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-top: 8px;
}
.candidates button.code-opt {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 2px;
  padding: 14px 8px;
  font-variant-numeric: tabular-nums;
}
.candidates button.code-opt:hover { border-color: var(--accent); background: transparent; }
.candidates button.code-opt.selected {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
}

.refresh-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
}
.refresh-link:hover { color: var(--accent); background: none; }

.msg { margin-top: 16px; font-size: 14px; min-height: 20px; }
.msg.error { color: var(--danger); }
.msg.ok { color: #2e9e5b; }

.foot-link { text-align: center; margin-top: 20px; font-size: 14px; color: var(--muted); }
.foot-link a { color: var(--accent); text-decoration: none; }

/* 控制台 */
.dash-code {
  text-align: center;
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 6px;
  margin: 8px 0 24px;
  font-variant-numeric: tabular-nums;
}

.link-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
}
.link-row .url {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.link-row button {
  padding: 6px 14px;
  font-size: 13px;
  flex-shrink: 0;
}

.preview-box {
  margin-top: 24px;
  text-align: center;
}
.preview-box img {
  max-width: 280px;
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
}
.preview-box .empty {
  max-width: 280px;
  aspect-ratio: 1;
  margin: 0 auto;
  border: 2px dashed var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
}

.upload-row {
  margin-top: 20px;
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}
input[type="file"] { font-size: 14px; color: var(--muted); max-width: 100%; }

.meta-line { text-align: center; margin-top: 14px; font-size: 13px; color: var(--muted); }

footer.site {
  text-align: center;
  padding: 24px;
  font-size: 13px;
  color: var(--muted);
}

/* ===== v2 ===== */

/* 主页搜索框 */
.search-box {
  display: flex;
  align-items: stretch;
  gap: 10px;
  width: 100%;
  max-width: 420px;
  margin: 32px auto 0;
}
.search-box input {
  flex: 1;
  height: 52px;
  padding: 0 18px;
  font-size: 20px;
  letter-spacing: 4px;
  font-variant-numeric: tabular-nums;
  text-align: center;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  color: var(--text);
  outline: none;
  min-width: 0;
  line-height: 52px;
}
.search-box input:focus { border-color: var(--accent); }
.search-box button {
  height: 52px;
  padding: 0 28px;
  border-radius: 12px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* 平台徽标 */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  color: #fff;
}
.chip.wechat { background: #07C160; }
.chip.feishu { background: #3370FF; }
.chip.none { background: var(--muted); }

/* 控制台：群号卡片 */
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 28px 0 14px;
}
.section-head h2 { font-size: 18px; }

.code-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 18px;
}
.code-card .head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.code-card .head .gname { font-size: 17px; font-weight: 700; flex: 1; min-width: 120px; }
.code-card .head .gcode {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.code-card .qr-preview {
  text-align: center;
  margin-top: 16px;
}
.code-card .qr-preview img {
  width: 100%;
  max-width: 220px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
}
.code-card .qr-preview .empty {
  max-width: 220px;
  aspect-ratio: 1;
  margin: 0 auto;
  border: 2px dashed var(--border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 14px;
}
.code-card .actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 14px;
  flex-wrap: wrap;
}
.code-card .actions .btn,
.code-card .actions button { padding: 9px 18px; font-size: 14px; }

/* 创建面板 */
.create-panel {
  background: var(--card);
  border: 1.5px dashed var(--accent);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 18px;
}
.create-panel .candidates { margin-top: 4px; }

/* 资料卡 */
.profile-grid {
  display: flex;
  gap: 16px;
  align-items: flex-end;
  flex-wrap: wrap;
}
.profile-grid .field { flex: 1; min-width: 200px; }
.profile-grid input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  outline: none;
}
.profile-grid input[type="text"]:focus { border-color: var(--accent); }
.wechat-qr-thumb {
  width: 88px;
  height: 88px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
}

/* ===== v3：控制台列表 / 详情 / 管理 ===== */

/* 状态色点 */
.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--muted);
}
.dot.green { background: #2e9e5b; }
.dot.yellow { background: #e6a817; }
.dot.red { background: var(--danger); }
.dot.none { background: var(--muted); opacity: 0.5; }

.status-legend {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
  font-size: 12px;
  color: var(--muted);
}
.status-legend .dot { width: 8px; height: 8px; margin-left: 6px; }

/* 群号列表行 */
.code-row {
  display: grid;
  grid-template-columns: 14px 1fr auto auto auto;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  margin-bottom: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s;
}
.code-row:hover { border-color: var(--accent); }
.code-row .rname {
  font-weight: 600;
  font-size: 15px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.code-row .rcode {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.code-row .rstatus { font-size: 12px; color: var(--muted); }
.code-row .rstatus.red { color: var(--danger); }
.code-row .rstatus.yellow { color: #e6a817; }
.code-row .ractions { display: flex; gap: 8px; }
.code-row .ractions button { padding: 7px 14px; font-size: 13px; }
.code-row .rmsg { grid-column: 2 / -1; margin: 0; min-height: 0; font-size: 12px; }
.code-row .rmsg:empty { display: none; }

@media (max-width: 560px) {
  .code-row { grid-template-columns: 14px 1fr auto; }
  .code-row .rstatus { display: none; }
  .code-row .ractions { grid-column: 2 / -1; }
}

button.danger, .btn.danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
}
button.danger:hover, .btn.danger:hover { background: rgba(229, 72, 77, 0.1); }

/* 详情页二维码预览（非卡片作用域） */
.qr-preview { text-align: center; }
.qr-preview img {
  width: 100%;
  max-width: 220px;
  border-radius: 12px;
  background: #fff;
}
.qr-preview .empty {
  max-width: 260px;
  margin: 0 auto;
  padding: 32px 20px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  color: var(--muted);
  font-size: 14px;
}
.gcode {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* 自定义群号输入行 */
.custom-code-row { display: flex; gap: 10px; align-items: stretch; }
.custom-code-row input {
  flex: 1;
  padding: 11px 14px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  outline: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.custom-code-row input:focus { border-color: var(--accent); }
.custom-code-row button { flex-shrink: 0; padding: 0 18px; font-size: 14px; }

/* 管理页用户行 */
.user-row {
  display: grid;
  grid-template-columns: 1fr auto auto auto auto;
  align-items: center;
  gap: 14px;
  padding: 13px 18px;
  margin-bottom: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 14px;
}
.user-row .uemail { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-row .urole { font-size: 12px; padding: 3px 10px; border-radius: 999px; background: var(--border); }
.user-row .urole.premium { background: #e6a817; color: #1a1a1a; }
.user-row .urole.admin { background: var(--accent); color: #fff; }
.user-row .ucodes, .user-row .udate { font-size: 12px; color: var(--muted); }
.user-row .uactions button { padding: 6px 14px; font-size: 13px; }

@media (max-width: 560px) {
  .user-row { grid-template-columns: 1fr auto; }
  .user-row .ucodes, .user-row .udate { display: none; }
}