/* ====== 51 DNS 查询 · 深空蓝 + 信号青 · 终端控制台风 ====== */
.tsk.dns{
  --tsk-bg:#eef3f9;
  --tsk-card:#ffffff;
  --tsk-card-2:#f2f7fb;
  --tsk-ink:#122036;
  --tsk-sub:#4d5f78;
  --tsk-faint:#8194ab;
  --tsk-line:#d9e3ee;
  --tsk-line-2:#e8eff6;
  --tsk-brand:#0f9e88;
  --tsk-brand-2:#0d7fa2;
  --tsk-brand-soft:#e2faf5;
  --tsk-brand-ink:#0b7d6b;
  --tsk-ok:#1f9d55;
  --tsk-ok-soft:#e6f8ee;
  --tsk-warn:#b37a08;
  --tsk-warn-soft:#fdf4de;
  --tsk-bad:#cf3540;
  --tsk-bad-soft:#fdeceb;
  --tsk-shadow-sm:0 1px 2px rgba(18,32,54,.06),0 8px 20px rgba(18,32,54,.06);
  --tsk-shadow:0 2px 8px rgba(18,32,54,.08),0 22px 54px rgba(18,32,54,.10);
  background:
    linear-gradient(180deg,rgba(15,158,136,.05),transparent 320px),
    repeating-linear-gradient(0deg,rgba(15,158,136,.045) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(90deg,rgba(15,158,136,.045) 0 1px,transparent 1px 44px),
    radial-gradient(720px 300px at 88% -8%,rgba(13,127,162,.08),transparent 60%),
    var(--tsk-bg);
}
:root[data-theme="dark"] .tsk.dns{
  --tsk-bg:#080d16;
  --tsk-card:#111a28;
  --tsk-card-2:#0d1522;
  --tsk-ink:#eaf2ff;
  --tsk-sub:#9aabc4;
  --tsk-faint:#6f8098;
  --tsk-line:#1e2c42;
  --tsk-line-2:#172234;
  --tsk-brand:#43f0cf;
  --tsk-brand-2:#5ad8ff;
  --tsk-brand-soft:rgba(67,240,207,.12);
  --tsk-brand-ink:#43f0cf;
  --tsk-ok:#6cf09a;
  --tsk-ok-soft:rgba(108,240,154,.12);
  --tsk-warn:#ffcb66;
  --tsk-warn-soft:rgba(255,203,102,.12);
  --tsk-bad:#ff8b83;
  --tsk-bad-soft:rgba(255,139,131,.12);
  --tsk-shadow-sm:0 1px 2px rgba(0,0,0,.5),0 8px 20px rgba(0,0,0,.28);
  --tsk-shadow:0 2px 8px rgba(0,0,0,.5),0 22px 54px rgba(0,0,0,.36);
  background:
    linear-gradient(180deg,rgba(67,240,207,.05),transparent 320px),
    repeating-linear-gradient(0deg,rgba(67,240,207,.035) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(90deg,rgba(67,240,207,.035) 0 1px,transparent 1px 44px),
    radial-gradient(720px 300px at 88% -8%,rgba(90,216,255,.12),transparent 60%),
    var(--tsk-bg);
}

.dns-hero{display:grid;grid-template-columns:minmax(0,1fr) 394px;gap:30px;padding:30px 0 24px;align-items:stretch;}
.dns-hero-l{display:flex;flex-direction:column;}
.dns-hero-l>.tsk-hs{flex:1 1 auto;}
.dns-hero-l .tsk-h1 b{color:var(--tsk-brand-ink);}
.dns-sec-sub{font-size:12px;color:var(--tsk-faint);font-weight:600;}

/* ---- 控制台 ---- */
.dns-console{background:var(--tsk-card);border:1px solid var(--tsk-line);border-radius:13px;box-shadow:var(--tsk-shadow);overflow:hidden;display:flex;flex-direction:column;}
.dns-console-hd{display:flex;align-items:center;gap:9px;padding:11px 16px;background:var(--tsk-card-2);border-bottom:1px solid var(--tsk-line);font:700 11.5px/1 var(--tsk-num);letter-spacing:.12em;text-transform:uppercase;color:var(--tsk-sub);}
.dns-dot{width:8px;height:8px;border-radius:50%;background:var(--tsk-brand);box-shadow:0 0 0 4px var(--tsk-brand-soft);}
.dns-console-hd i{margin-left:auto;font-style:normal;font-size:10px;letter-spacing:.14em;color:var(--tsk-faint);}
.dns-console-body{padding:14px 16px 16px;}
.dns-console-body label{display:block;font-size:11.5px;font-weight:800;letter-spacing:.05em;color:var(--tsk-sub);margin-bottom:7px;}
.dns-input{width:100%;padding:10px 12px;border:1px solid var(--tsk-line);border-radius:9px;background:var(--tsk-card-2);color:var(--tsk-ink);font:600 13px/1.85 var(--tsk-num);resize:vertical;outline:none;transition:border-color .16s,box-shadow .16s;}
.dns-input:focus{border-color:var(--tsk-brand);box-shadow:0 0 0 3px var(--tsk-brand-soft);}
.dns-input::placeholder{color:var(--tsk-faint);}
.dns-hint{margin-top:7px;font-size:10.5px;line-height:1.7;color:var(--tsk-faint);}
.dns-types{display:grid;grid-template-columns:repeat(6,1fr);gap:5px;margin-top:13px;}
.dns-type{padding:7px 0;border:1px solid var(--tsk-line);border-radius:7px;background:var(--tsk-card-2);color:var(--tsk-sub);font:800 11px/1.2 var(--tsk-num);letter-spacing:.02em;cursor:pointer;transition:.15s;}
.dns-type:hover{border-color:var(--tsk-brand);color:var(--tsk-brand-ink);}
.dns-type.on{background:var(--tsk-brand-soft);border-color:var(--tsk-brand);color:var(--tsk-brand-ink);box-shadow:inset 0 0 0 1px rgba(46,230,197,.18);}
.dns-err{margin-top:10px;padding:9px 11px;border-radius:8px;background:var(--tsk-bad-soft);border:1px solid rgba(255,122,114,.28);color:var(--tsk-bad);font-size:11.5px;line-height:1.75;}
.dns-acts{display:flex;gap:8px;margin-top:14px;}
.dns-acts .tsk-btn-main{flex:1;background:linear-gradient(120deg,var(--tsk-brand),var(--tsk-brand-2));color:#04140f;}
.dns-btn-ghost{color:var(--tsk-sub);}
.dns-console-foot{margin-top:11px;padding-top:10px;border-top:1px dashed var(--tsk-line);font-size:10.5px;line-height:1.7;color:var(--tsk-faint);}

/* ---- 结果 ---- */
.dns-result{margin:2px 0 30px;border:1px solid var(--tsk-line);border-radius:15px;background:var(--tsk-card);box-shadow:var(--tsk-shadow);overflow:hidden;}
.dns-res-hd{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:14px 18px;border-bottom:1px solid var(--tsk-line);background:var(--tsk-card-2);}
.dns-stat{min-width:86px;}
.dns-stat b{display:block;font:800 19px/1.1 var(--tsk-num);color:var(--tsk-brand-ink);font-variant-numeric:tabular-nums;}
.dns-stat.is-bad b{color:var(--tsk-bad);}
.dns-stat span{display:block;margin-top:2px;font-size:10.5px;color:var(--tsk-faint);font-weight:700;letter-spacing:.03em;}
.dns-res-acts{margin-left:auto;display:flex;gap:7px;}
.dns-table-wrap{overflow-x:auto;}
.dns-table{width:100%;min-width:720px;border-collapse:collapse;}
.dns-table th,.dns-table td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--tsk-line-2);font-size:12.5px;line-height:1.75;vertical-align:top;}
.dns-table thead th{background:var(--tsk-card);font:800 10.5px/1.4 var(--tsk-num);letter-spacing:.09em;text-transform:uppercase;color:var(--tsk-faint);}
.dns-table tbody tr:hover td{background:var(--tsk-card-2);}
.dns-table tbody tr:last-child td{border-bottom:0;}
.dns-dom{font:700 12.5px/1.7 var(--tsk-num);color:var(--tsk-ink);word-break:break-all;}
.dns-rec{font:600 12px/1.8 var(--tsk-num);color:var(--tsk-sub);word-break:break-all;}
.dns-rec em{display:block;font-style:normal;color:var(--tsk-faint);font-size:10.5px;}
.dns-ttl{font:700 11.5px/1.6 var(--tsk-num);color:var(--tsk-sub);}
.dns-badge{display:inline-block;padding:2px 8px;border-radius:5px;font:800 10.5px/1.7 var(--tsk-num);letter-spacing:.05em;}
.dns-badge.ok{background:var(--tsk-ok-soft);color:var(--tsk-ok);}
.dns-badge.bad{background:var(--tsk-bad-soft);color:var(--tsk-bad);}
.dns-badge.warn{background:var(--tsk-warn-soft);color:var(--tsk-warn);}
.dns-note{padding:11px 18px;font-size:11.5px;line-height:1.8;color:var(--tsk-faint);border-top:1px solid var(--tsk-line-2);}

/* ---- 类型卡 ---- */
.dns-type-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:11px;}
.dns-type-card{position:relative;padding:17px 18px 15px;background:var(--tsk-card);border:1px solid var(--tsk-line);border-radius:12px;box-shadow:var(--tsk-shadow-sm);overflow:hidden;}
.dns-type-card::after{content:"";position:absolute;right:-28px;top:-28px;width:74px;height:74px;border-radius:50%;background:var(--tsk-brand-soft);}
.dns-type-tag{display:inline-block;padding:3px 9px;border-radius:4px;background:var(--tsk-brand-soft);color:var(--tsk-brand-ink);font:800 12px/1.6 var(--tsk-num);letter-spacing:.08em;position:relative;z-index:1;}
.dns-type-card b{display:block;margin-top:9px;font-size:13.5px;position:relative;z-index:1;}
.dns-type-card p{margin-top:5px;font-size:12px;line-height:1.8;color:var(--tsk-sub);position:relative;z-index:1;}
.dns-type-card code{display:block;margin-top:10px;padding:6px 9px;border-radius:6px;background:var(--tsk-card-2);border:1px solid var(--tsk-line-2);font:600 10.5px/1.6 var(--tsk-num);color:var(--tsk-faint);word-break:break-all;}

/* ---- 流程 ---- */
.dns-flow{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px;position:relative;}
.dns-flow-node{padding:18px 18px 16px;background:var(--tsk-card);border:1px solid var(--tsk-line);border-radius:12px;box-shadow:var(--tsk-shadow-sm);}
.dns-flow-node span{display:inline-block;font:800 11px/1 var(--tsk-num);letter-spacing:.14em;color:var(--tsk-brand-ink);padding:4px 8px;border-radius:4px;background:var(--tsk-brand-soft);}
.dns-flow-node b{display:block;margin-top:11px;font-size:13.5px;}
.dns-flow-node p{margin-top:5px;font-size:12px;line-height:1.8;color:var(--tsk-sub);}

/* ---- 异常 ---- */
.dns-abn{display:grid;grid-template-columns:repeat(auto-fit,minmax(272px,1fr));gap:9px;}
.dns-abn-item{padding:13px 15px;border-left:3px solid var(--tsk-brand);background:var(--tsk-card);border-radius:0 9px 9px 0;box-shadow:var(--tsk-shadow-sm);}
.dns-abn-item b{display:block;font:800 12px/1.5 var(--tsk-num);letter-spacing:.06em;color:var(--tsk-brand-ink);}
.dns-abn-item p{margin-top:5px;font-size:12px;line-height:1.8;color:var(--tsk-sub);}

/* ---- 使用场景 ---- */
.dns-case{display:grid;grid-template-columns:repeat(auto-fit,minmax(268px,1fr));gap:11px;}
.dns-case-card{padding:19px 20px;background:var(--tsk-card);border:1px solid var(--tsk-line);border-radius:13px;box-shadow:var(--tsk-shadow-sm);position:relative;}
.dns-case-card::before{content:"";position:absolute;inset:0 auto 0 0;width:3px;border-radius:13px 0 0 13px;background:linear-gradient(180deg,var(--tsk-brand),var(--tsk-brand-2));}
.dns-case-ic{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:9px;background:var(--tsk-brand-soft);font-size:17px;line-height:1;}
.dns-case-card b{display:block;margin-top:11px;font-size:13.5px;color:var(--tsk-ink);}
.dns-case-card p{margin-top:5px;font-size:12px;line-height:1.85;color:var(--tsk-sub);}

/* ---- 结果解读表 ---- */
.dns-read{overflow-x:auto;border:1px solid var(--tsk-line);border-radius:12px;background:var(--tsk-card);box-shadow:var(--tsk-shadow-sm);}
.dns-read-table{width:100%;min-width:620px;border-collapse:collapse;}
.dns-read-table th,.dns-read-table td{padding:11px 15px;text-align:left;font-size:12.5px;line-height:1.75;border-bottom:1px solid var(--tsk-line-2);}
.dns-read-table thead th{background:var(--tsk-card-2);font:800 10.5px/1.4 var(--tsk-num);letter-spacing:.08em;text-transform:uppercase;color:var(--tsk-faint);}
.dns-read-table tbody tr:last-child td{border-bottom:0;}
.dns-read-table tbody tr:hover td{background:var(--tsk-card-2);}
.dns-read-k{font-weight:800;color:var(--tsk-brand-ink);white-space:nowrap;}

/* ---- 交互细节 ---- */
.dns-type-card{transition:transform .18s ease,box-shadow .18s ease;}
.dns-type-card:hover{transform:translateY(-2px);box-shadow:var(--tsk-shadow);}
.dns-case-card{transition:border-color .18s ease,box-shadow .18s ease;}
.dns-case-card:hover{border-color:var(--tsk-brand);box-shadow:var(--tsk-shadow);}
.dns-flow-node{transition:border-color .18s ease;}
.dns-flow-node:hover{border-color:var(--tsk-brand);}
.dns-abn-item{transition:box-shadow .18s ease;}
.dns-abn-item:hover{box-shadow:var(--tsk-shadow);}
.dns-btn-ghost:focus-visible,
.dns-type:focus-visible,
.tsk.dns .tsk-btn:focus-visible{outline:2px solid var(--tsk-brand);outline-offset:2px;}

/* ---- 表头在窄屏固定 ---- */
@media (max-width:720px){
  .dns-table thead th{position:sticky;top:0;z-index:2;box-shadow:0 1px 0 var(--tsk-line);}
}

/* ---- 深色下的表格与徽标微调 ---- */
:root[data-theme="dark"] .dns-table thead th{background:#0e1727;}
:root[data-theme="dark"] .dns-table tbody tr:hover td{background:#152033;}
:root[data-theme="dark"] .dns-type-card code{background:#0b1320;}
:root[data-theme="dark"] .dns-console{background:#0f1826;}

/* ---- 打印 ---- */
@media print{
  .dns-hero-r,.dns-res-acts,.dns-console{display:none;}
  .tsk.dns{background:#fff;}
  .dns-result,.dns-type-card,.dns-flow-node,.dns-abn-item,.dns-case-card,.dns-read{box-shadow:none;border-color:#ccc;}
}

/* ---- 减少动效 ---- */
@media (prefers-reduced-motion:reduce){
  .dns-type-card,.dns-case-card,.dns-flow-node,.dns-abn-item,.dns-type{transition:none;}
  .dns-type-card:hover,.dns-case-card:hover{transform:none;}
}

/* ---- 输入禁用与按钮状态 ---- */
.dns-input:disabled{opacity:.6;cursor:not-allowed;}
.dns-acts .tsk-btn:disabled{opacity:.55;cursor:progress;}
.dns-stat b.is-zero{color:var(--tsk-faint);}
.dns-rec span{display:inline-block;max-width:100%;}

@media (max-width:900px){
  .dns-hero{grid-template-columns:1fr;gap:22px;}
  .dns-types{grid-template-columns:repeat(3,1fr);}
  .dns-res-hd{gap:10px;}
  .dns-res-acts{margin-left:0;width:100%;}
}
@media (max-width:520px){
  .dns-acts{flex-wrap:wrap;}
  .dns-acts .tsk-btn-main{flex:1 1 100%;}
  .dns-table th:nth-child(4),.dns-table td:nth-child(4){display:none;}
}