/* ===== 基础变量：亮色 / 暗色 ===== */
:root {
  --bg: #f4f6fa; --card: #ffffff; --card2: #f8fafc; --text: #1f2937; --muted: #6b7280; --border: #e5e7eb;
  --primary: #2563eb; --primary-weak: #dbeafe; --ok: #16a34a; --warn: #d97706; --bad: #dc2626; --info: #7c3aed;
  --ok-bg: #dcfce7; --warn-bg: #fef3c7; --bad-bg: #fee2e2; --info-bg: #ede9fe;
  --shadow: 0 1px 2px rgba(15,23,42,.06), 0 4px 14px rgba(15,23,42,.05);
  --radius: 12px; --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0b1120; --card: #111827; --card2: #0f172a; --text: #e5e7eb; --muted: #9ca3af; --border: #1f2937;
  --primary: #60a5fa; --primary-weak: #1e3a8a; --ok: #4ade80; --warn: #fbbf24; --bad: #f87171; --info: #a78bfa;
  --ok-bg: #052e16; --warn-bg: #3b2603; --bad-bg: #3f0d0d; --info-bg: #2e1065;
  --shadow: 0 1px 2px rgba(0,0,0,.4); color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1120; --card: #111827; --card2: #0f172a; --text: #e5e7eb; --muted: #9ca3af; --border: #1f2937;
    --primary: #60a5fa; --primary-weak: #1e3a8a; --ok: #4ade80; --warn: #fbbf24; --bad: #f87171; --info: #a78bfa;
    --ok-bg: #052e16; --warn-bg: #3b2603; --bad-bg: #3f0d0d; --info-bg: #2e1065;
    --shadow: 0 1px 2px rgba(0,0,0,.4); color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6; font-size: 15px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
code, .mono { font-family: var(--mono); }
h1 { font-size: 24px; margin: 22px 0 4px; }
h2 { font-size: 18px; margin: 0 0 12px; }
h3 { font-size: 15px; margin: 0 0 8px; }
.lead { color: var(--muted); margin: 0 0 18px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.ok { color: var(--ok); } .warn { color: var(--warn); } .bad { color: var(--bad); } .info { color: var(--info); }

/* ===== 顶部导航 ===== */
.topbar { background: var(--card); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 20; }
.topbar .wrap { max-width: 1280px; display: flex; align-items: center; gap: 14px; height: 52px; }
.brand { font-weight: 700; color: var(--text); white-space: nowrap; display: flex; align-items: center; gap: 6px; }
.brand:hover { text-decoration: none; }
.brand-logo { width: 22px; height: 22px; }
.nav { display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; flex: 1; min-width: 0;
  -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 24px), transparent); mask-image: linear-gradient(to right, #000 calc(100% - 24px), transparent); padding-right: 20px; }
.nav::-webkit-scrollbar { display: none; }
.nav a { color: var(--muted); padding: 6px 8px; border-radius: 8px; white-space: nowrap; font-size: 13.5px; }
.nav a:hover { background: var(--card2); color: var(--text); text-decoration: none; }
.nav a.active { color: var(--primary); background: var(--primary-weak); font-weight: 600; }
:root[data-theme="dark"] .nav a.active { color: #dbeafe; }
.theme-btn { border: 1px solid var(--border); background: var(--card2); color: var(--text); border-radius: 8px; height: 32px; min-width: 32px;
  cursor: pointer; font-size: 15px; padding: 0 8px; }

/* ===== 卡片与布局 ===== */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow); margin-bottom: 16px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); margin-bottom: 16px; }
.grid > .card { margin-bottom: 0; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.kv { display: grid; grid-template-columns: 110px 1fr; gap: 6px 12px; font-size: 14px; }
.kv > div:nth-child(odd) { color: var(--muted); }
.big-ip { font-family: var(--mono); font-size: 22px; font-weight: 700; word-break: break-all; }
.label { color: var(--muted); font-size: 13px; margin-bottom: 2px; }

/* ===== 表单 ===== */
.search { display: flex; gap: 8px; margin-bottom: 14px; }
.search input, .input { flex: 1; min-width: 0; font-size: 16px; padding: 10px 14px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--card); color: var(--text); outline: none; font-family: var(--mono); }
.search input:focus, .input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-weak); }
.btn { font-size: 15px; padding: 9px 18px; border: 0; border-radius: 10px; background: var(--primary); color: #fff; cursor: pointer; white-space: nowrap; }
:root[data-theme="dark"] .btn { color: #0b1120; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.secondary { background: var(--card2); color: var(--text); border: 1px solid var(--border); }
select.input { font-family: inherit; flex: 0 0 auto; }
.chip { border: 1px solid var(--border); background: var(--card2); color: var(--text); border-radius: 999px; padding: 2px 10px; font-size: 13px; cursor: pointer; }
.chip.on { background: var(--primary-weak); border-color: var(--primary); color: var(--primary); }
.switch { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; font-size: 14px; color: var(--muted); user-select: none; }
.form-error { color: var(--bad); margin: 6px 0; }

/* ===== 表格 ===== */
.table-wrap { overflow-x: auto; }
table.t { width: 100%; border-collapse: collapse; font-size: 14px; }
table.t th, table.t td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
table.t th { color: var(--muted); font-weight: 500; background: var(--card2); white-space: nowrap; }
table.t tr:last-child td { border-bottom: 0; }
table.t td.ip { font-family: var(--mono); word-break: break-all; }
.group-row td { background: var(--card2); font-weight: 600; color: var(--muted); font-size: 13px; }

/* ===== 标签 ===== */
.tag { display: inline-block; padding: 0 8px; border-radius: 999px; font-size: 12.5px; line-height: 20px; white-space: nowrap; border: 1px solid transparent; }
.tag.ok { background: var(--ok-bg); color: var(--ok); }
.tag.warn { background: var(--warn-bg); color: var(--warn); }
.tag.bad { background: var(--bad-bg); color: var(--bad); }
.tag.info { background: var(--info-bg); color: var(--info); }
.tag.gray { background: var(--card2); color: var(--muted); border-color: var(--border); }
.flag { font-size: 1.1em; margin-right: 3px; }
.cc { font-family: var(--mono); font-size: 12px; color: var(--muted); margin-right: 4px; }

/* ===== 提示 ===== */
.notice { border-radius: 10px; padding: 10px 14px; margin-bottom: 14px; font-size: 14px; border: 1px solid var(--border); background: var(--card2); }
.notice.ok { background: var(--ok-bg); border-color: transparent; }
.notice.warn { background: var(--warn-bg); border-color: transparent; }
.notice.bad { background: var(--bad-bg); border-color: transparent; }
.verdict-big { font-size: 18px; font-weight: 700; margin-bottom: 4px; }

/* ===== 加载动画 ===== */
.skeleton { display: inline-block; height: 1em; width: 120px; border-radius: 6px; vertical-align: middle;
  background: linear-gradient(90deg, var(--card2), var(--border), var(--card2)); background-size: 200% 100%; animation: sk 1.2s infinite; }
@keyframes sk { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--border); border-top-color: var(--primary);
  border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -2px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 延迟条 ===== */
.bars { display: inline-flex; gap: 2px; vertical-align: middle; }
.bars i { width: 6px; height: 14px; border-radius: 2px; background: var(--border); display: inline-block; }
.bars i.g { background: var(--ok); } .bars i.y { background: var(--warn); } .bars i.r { background: var(--bad); } .bars i.x { background: #9ca3af; opacity: .5; }
.ms { font-family: var(--mono); font-size: 13px; min-width: 56px; display: inline-block; text-align: right; }

/* ===== 分数环 ===== */
.score { display: flex; align-items: center; gap: 16px; }
.score-num { font-size: 40px; font-weight: 800; line-height: 1; }
.meter { height: 8px; background: var(--card2); border-radius: 999px; overflow: hidden; border: 1px solid var(--border); margin-top: 8px; }
.meter > span { display: block; height: 100%; border-radius: 999px; }

details.raw summary { cursor: pointer; color: var(--muted); font-size: 14px; }
details.raw pre { background: var(--card2); border: 1px solid var(--border); border-radius: 8px; padding: 10px; overflow: auto; max-height: 420px; font-size: 12px; }

/* ===== 页脚 ===== */
.footer { color: var(--muted); font-size: 12.5px; padding: 18px 16px 34px; text-align: center; line-height: 1.8; }
.footer a { color: var(--muted); text-decoration: underline; }

@media (max-width: 640px) {
  body { font-size: 14px; }
  h1 { font-size: 20px; }
  .brand-text { display: none; }
  .search { flex-direction: column; }
  .kv { grid-template-columns: 90px 1fr; }
  .card { padding: 14px; }
  table.t th, table.t td { padding: 7px 6px; }
  .hide-sm { display: none; }
}

/* ===== 封锁检测页 ===== */
.hero { background: linear-gradient(135deg, #1e3a8a, #2563eb 60%, #3b82f6); color: #fff; padding: 30px 0 22px; margin-bottom: 16px; }
:root[data-theme="dark"] .hero { background: linear-gradient(135deg, #0b1d4d, #1e3a8a); }
.hero h1 { margin: 0 0 4px; }
.hero .lead { color: rgba(255,255,255,.85); }
.hero .search input { border: 0; box-shadow: 0 4px 14px rgba(0,0,0,.15); }
.hero .btn { background: #f59e0b; color: #fff; font-weight: 600; }
.hero .chip { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.45); color: #fff; font-family: var(--mono); }
.hero .form-error { background: #fef2f2; color: #b91c1c; border-radius: 8px; padding: 8px 12px; }
.hints { font-size: 13px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.nodes-bar { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 16px; font-size: 13px; }
.node-pill { background: var(--card); border: 1px solid var(--border); border-radius: 999px; padding: 3px 12px; display: inline-flex; align-items: center; gap: 6px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: #9ca3af; display: inline-block; }
.dot.on { background: var(--ok); box-shadow: 0 0 0 3px var(--ok-bg); }
.verdict { background: var(--card); border: 1px solid var(--border); border-left: 6px solid var(--primary); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 16px; }
.verdict-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.verdict h2 { margin: 0; font-size: 21px; }
.verdict-summary { margin: 8px 0 4px; }
.verdict-details { margin: 6px 0 0; padding-left: 20px; font-size: 14px; }
.verdict-meta { margin-top: 8px; font-size: 12px; color: var(--muted); }
.badge { font-size: 12px; padding: 2px 10px; border-radius: 999px; background: var(--info-bg); color: var(--info); font-weight: 600; }
.verdict .spinner { display: none; }
.verdict.pending .spinner { display: inline-block; }
.verdict.normal { border-left-color: var(--ok); background: var(--ok-bg); } .verdict.normal h2 { color: var(--ok); }
.verdict.blocked { border-left-color: var(--bad); background: var(--bad-bg); } .verdict.blocked h2 { color: var(--bad); }
.verdict.partial { border-left-color: var(--warn); background: var(--warn-bg); } .verdict.partial h2 { color: var(--warn); }
.verdict.overseas_blocked { border-left-color: var(--info); background: var(--info-bg); } .verdict.overseas_blocked h2 { color: var(--info); }
.verdict.down, .verdict.insufficient, .verdict.error { border-left-color: var(--muted); }
.region { font-size: 12px; padding: 1px 8px; border-radius: 6px; font-weight: 600; white-space: nowrap; }
.region.cn { background: var(--bad-bg); color: var(--bad); }
.region.global { background: var(--primary-weak); color: var(--primary); }
.tcp-item { white-space: nowrap; font-family: var(--mono); font-size: 13px; }
.status-cell { font-weight: 600; white-space: nowrap; }
.loading { color: var(--muted); }
.loading::after { content: "…"; animation: blink 1s steps(3) infinite; }
@keyframes blink { 50% { opacity: .3; } }
table.rules { border-collapse: collapse; margin: 12px 0; width: 100%; max-width: 560px; }
table.rules th, table.rules td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
@media (max-width: 720px) {
  table.nodes thead { display: none; }
  table.nodes, table.nodes tbody, table.nodes tr, table.nodes td { display: block; width: 100%; }
  table.nodes tr { border-bottom: 1px solid var(--border); padding: 8px 0; }
  table.nodes td { border: 0; padding: 3px 10px; display: flex; gap: 10px; }
  table.nodes td::before { content: attr(data-label); color: var(--muted); min-width: 72px; font-size: 12px; }
}
.mono { font-family: var(--mono); }
.notice.info { background: var(--info-bg); border-color: transparent; }
pre { background: var(--card2); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; margin: 0 0 10px; overflow: auto; }
details > summary { cursor: pointer; color: var(--muted); }
.st-card h3 { margin: 0; }
.st-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; }
.speed-num { font-size: 28px; font-weight: 800; font-family: var(--mono); }
#list.grid { align-items: start; }