:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --border: #e5e9f0;
  --text: #1e293b;
  --text-dim: #64748b;
  --text-faint: #94a3b8;
  --primary: #2563eb;
  --primary-soft: #eff4ff;
  --v6: #7c3aed;
  --v6-soft: #f3efff;
  --v4: #0ea5e9;
  --v4-soft: #e8f6fe;
  --ok: #16a34a;
  --warn: #d97706;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 23, 42, .05);
  --shadow-hover: 0 4px 10px rgba(15, 23, 42, .08), 0 16px 36px rgba(15, 23, 42, .1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ------------------------------------------------------------ 布局 ---- */
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px 64px; }

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.topbar-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; }
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #fff; display: grid; place-items: center; font-size: 17px;
}
.spacer { flex: 1; }

.search {
  flex: 0 1 260px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface-2);
  font-size: 14px;
  outline: none;
  transition: border-color .15s, background .15s;
}
.search:focus { border-color: var(--primary); background: #fff; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 14px; cursor: pointer;
  transition: all .15s;
  text-decoration: none !important;
}
.btn:hover { background: var(--surface-2); border-color: #cbd5e1; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: #1d4ed8; border-color: #1d4ed8; color: #fff; }
.btn-danger { color: var(--danger); border-color: #fecaca; background: var(--danger-soft); }
.btn-danger:hover { background: #fee2e2; }
.btn-sm { padding: 4px 10px; font-size: 13px; border-radius: 7px; }

/* -------------------------------------------------------- IPv6 状态条 -- */
.statusbar {
  max-width: 1180px; margin: 0 auto;
  padding: 18px 20px 4px;
  display: flex; gap: 12px; flex-wrap: wrap; align-items: stretch;
}
.status-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 18px;
  box-shadow: var(--shadow); flex: 1 1 320px;
}
.status-label {
  font-size: 12px; color: var(--text-faint);
  text-transform: uppercase; letter-spacing: .06em; font-weight: 600;
}
.status-value {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 15px; margin-top: 4px; word-break: break-all;
}
.status-meta { font-size: 12.5px; color: var(--text-dim); margin-top: 6px; }

.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--text-faint); }
.dot.online { background: var(--ok); box-shadow: 0 0 0 3px rgba(22,163,74,.15); }
.dot.offline { background: #cbd5e1; }
.dot.checking { background: var(--warn); }

/* ----------------------------------------------------------- 区块 ---- */
.section { margin-top: 28px; }
.section-head {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 14px; flex-wrap: wrap;
}
.section-title { font-size: 18px; font-weight: 700; margin: 0; display: flex; align-items: center; gap: 9px; }
.section-count { font-size: 13px; color: var(--text-faint); font-weight: 500; }
.section-hint { font-size: 13px; color: var(--text-dim); }

.tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 9px; border-radius: 999px;
  font-size: 12px; font-weight: 700; letter-spacing: .03em;
}
.tag-v6 { background: var(--v6-soft); color: var(--v6); }
.tag-v4 { background: var(--v4-soft); color: var(--v4); }
.tag-auto { background: #ecfdf5; color: #047857; font-weight: 600; }

/* ---------------------------------------------------------- 卡片网格 -- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 14px;
}
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s;
  display: flex; flex-direction: column; gap: 8px;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: #d5ddea; }
.card-head { display: flex; align-items: flex-start; gap: 11px; }
.card-icon {
  width: 38px; height: 38px; flex: none;
  border-radius: 10px; display: grid; place-items: center;
  font-size: 20px; background: var(--surface-2); border: 1px solid var(--border);
}
.card-title { font-weight: 650; font-size: 15.5px; display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.card-desc { font-size: 13px; color: var(--text-dim); min-height: 20px; }
.card-url {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px; color: var(--text-faint);
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 9px;
  word-break: break-all; margin-top: auto;
}
.card-actions { display: flex; gap: 8px; align-items: center; margin-top: 4px; }

.empty {
  border: 1px dashed var(--border); border-radius: var(--radius);
  padding: 30px; text-align: center; color: var(--text-faint); background: var(--surface);
}

/* ------------------------------------------------------------ 登录 ---- */
.login-page {
  min-height: 100vh; display: grid; place-items: center;
  background: linear-gradient(160deg, #eef2ff 0%, #f4f6fb 45%, #faf5ff 100%);
  padding: 20px;
}
.login-card {
  width: 100%; max-width: 380px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 18px; padding: 32px 30px;
  box-shadow: 0 10px 40px rgba(15, 23, 42, .08);
}
.login-title { font-size: 21px; font-weight: 700; margin: 16px 0 4px; text-align: center; }
.login-sub { font-size: 13.5px; color: var(--text-dim); text-align: center; margin-bottom: 22px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.field input {
  width: 100%; padding: 10px 12px; font-size: 14.5px;
  border: 1px solid var(--border); border-radius: 9px;
  background: var(--surface-2); outline: none;
  transition: border-color .15s, background .15s;
}
.field input:focus { border-color: var(--primary); background: #fff; }
.alert {
  border-radius: 9px; padding: 10px 12px; font-size: 13.5px; margin-bottom: 14px;
  background: var(--danger-soft); color: #b91c1c; border: 1px solid #fecaca;
}
.alert-info { background: var(--primary-soft); color: #1d4ed8; border-color: #bfdbfe; }
.login-foot { margin-top: 18px; text-align: center; font-size: 12px; color: var(--text-faint); }
.login-mark { display: grid; place-items: center; }
.login-mark .brand-mark { width: 46px; height: 46px; border-radius: 13px; font-size: 24px; }

/* ------------------------------------------------------------ 管理 ---- */
.panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  margin-top: 22px; overflow: hidden;
}
.panel-head {
  padding: 14px 18px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: var(--surface-2);
}
.panel-head h2 { font-size: 15.5px; margin: 0; font-weight: 700; }
.panel-body { padding: 16px 18px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { font-size: 12.5px; color: var(--text-dim); font-weight: 600; background: var(--surface-2); }
tr:last-child td { border-bottom: none; }
tr.disabled-row td { opacity: .5; }
td.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12.5px; }
.row-actions { display: flex; gap: 6px; flex-wrap: wrap; }

.form-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 12px;
}
.form-grid .full { grid-column: 1 / -1; }

.help { font-size: 12.5px; color: var(--text-dim); margin-top: 8px; line-height: 1.7; }
.help code {
  background: var(--surface-2); border: 1px solid var(--border);
  padding: 1px 5px; border-radius: 5px; font-size: 12px;
}
.kv { display: flex; gap: 8px; padding: 6px 0; border-bottom: 1px dashed var(--border); font-size: 13.5px; }
.kv:last-child { border-bottom: none; }
.kv .k { color: var(--text-dim); flex: 0 0 92px; }
.kv .v { font-family: ui-monospace, Menlo, Consolas, monospace; word-break: break-all; }

.toast {
  position: fixed; right: 20px; bottom: 20px; z-index: 100;
  background: #0f172a; color: #fff; padding: 11px 16px;
  border-radius: 10px; font-size: 14px; box-shadow: 0 8px 24px rgba(0,0,0,.2);
  opacity: 0; transform: translateY(10px); pointer-events: none;
  transition: opacity .2s, transform .2s;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.err { background: var(--danger); }

@media (max-width: 640px) {
  .topbar-inner { padding: 12px 14px; }
  .wrap, .statusbar { padding-left: 14px; padding-right: 14px; }
  .search { flex: 1 1 100%; order: 5; }
  .grid { grid-template-columns: 1fr; }
  table { font-size: 13px; }
  th, td { padding: 8px 8px; }
}