:root{--term:#060a15;--bg:#0b1020;--panel:#121a2f;--panel2:#18223d;--line:#24304f;--text:#e6ebf5;--muted:#8d9ab8;--brand:#4f8cff;--brand2:#7b5cff;--ok:#22c55e;--warn:#f59e0b;--bad:#ef4444;--radius:14px}
[data-theme=light]{--bg:#f5f7fb;--panel:#ffffff;--panel2:#eef2fa;--line:#dbe2ef;--text:#152036;--muted:#5d6b87;--term:#0f172a}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:15px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--brand)}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.row{display:flex;align-items:center;justify-content:space-between;gap:16px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.small{font-size:12.5px}
.hint{color:var(--muted);font-size:13.5px}
.topbar{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar .row{height:58px}
.brand{font-weight:700;display:flex;align-items:center;gap:10px}
.dot{width:10px;height:10px;border-radius:50%;background:var(--ok);box-shadow:0 0 10px var(--ok)}
nav a{color:var(--muted);text-decoration:none;margin-left:18px;font-size:14px}
nav a:hover{color:var(--text)}
.nav-cta{color:#fff!important;background:linear-gradient(90deg,var(--brand),var(--brand2));padding:6px 14px;border-radius:999px}
.hero{padding:56px 0 36px;background:radial-gradient(900px 400px at 10% -10%,rgba(79,140,255,.25),transparent),radial-gradient(700px 400px at 100% 0,rgba(123,92,255,.2),transparent)}
.hero-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:32px;align-items:center}
.badge{display:inline-block;font-size:12.5px;padding:4px 12px;border:1px solid var(--line);border-radius:999px;color:var(--muted);margin-bottom:14px}
h1{font-size:42px;line-height:1.15;margin:0 0 10px}
h1 small{display:block;font-size:18px;color:var(--muted);font-weight:500;margin-top:8px}
.lead{font-size:17px;margin:0 0 12px}
.sub{color:var(--muted);margin:0 0 22px}
.btn{border:0;cursor:pointer;border-radius:10px;padding:11px 18px;font-size:14.5px;font-weight:600;text-decoration:none;display:inline-block;color:var(--text);background:var(--panel2);transition:.15s}
.btn:hover{transform:translateY(-1px);filter:brightness(1.1)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn.primary{background:linear-gradient(90deg,var(--brand),var(--brand2));color:#fff}
.btn.ghost{background:transparent;border:1px solid var(--line)}
.btn.sm{padding:8px 14px;font-size:13.5px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:22px}
.info-card .kv{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px dashed var(--line)}
.info-card .kv span{color:var(--muted)}
.info-card .kv b{text-align:right;word-break:break-all;font-weight:600}
.copy{cursor:pointer}
.copy:hover{color:var(--brand)}
.files{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.notice{border-color:var(--warn)}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.sec-head h2{margin:0;font-size:21px}
.tool-form{display:flex;gap:10px;flex-wrap:wrap}
.tool-form input{flex:1;min-width:220px;background:var(--bg);border:1px solid var(--line);color:var(--text);border-radius:10px;padding:11px 14px;font-size:15px;outline:none}
.tool-form input:focus{border-color:var(--brand)}
.tool-btns{display:flex;gap:8px;flex-wrap:wrap}
.quick{margin:12px 0;color:var(--muted);font-size:13.5px}
.quick a{cursor:pointer;margin-right:12px;text-decoration:none}
.term{background:var(--term);border:1px solid var(--line);border-radius:10px;padding:16px;min-height:220px;max-height:520px;overflow:auto;font:13px/1.55 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:#cfe3ff;white-space:pre;margin:0}
.term .err{color:var(--bad)}
.speed-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.meter{background:var(--panel2);border-radius:12px;padding:18px;text-align:center}
.meter span{display:block;color:var(--muted);font-size:13px}
.meter b{display:block;font-size:34px;font-weight:700;margin:4px 0}
.meter i{color:var(--muted);font-style:normal;font-size:12px}
.progress{height:6px;background:var(--panel2);border-radius:6px;margin:16px 0;overflow:hidden}
.progress div{height:100%;width:0;background:linear-gradient(90deg,var(--brand),var(--brand2));transition:width .3s}
.speed-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.bh-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:14px 0}
.bh{background:var(--panel2);border:1px solid transparent;border-radius:12px;padding:14px;cursor:pointer;transition:.15s}
.bh:hover,.bh.active{border-color:var(--brand)}
.bh .t{display:flex;justify-content:space-between;align-items:center}
.bh .t b{font-size:15px}
.bh .line{font-size:18px;font-weight:700;margin:6px 0 2px}
.bh .meta{color:var(--muted);font-size:12.5px}
.tag{display:inline-block;font-size:11.5px;font-weight:700;padding:2px 8px;border-radius:6px;margin-right:4px;background:#334155;color:#fff}
.t-CN2{background:#16a34a}.t-163{background:#64748b}.t-CMI{background:#0891b2}.t-CMIN2{background:#0d9488}.t-CMNET{background:#0369a1}.t-9929{background:#c026d3}.t-CUG{background:#9333ea}.t-4837{background:#d97706}.t-CT{background:#475569}
.legend{color:var(--muted);font-size:12.5px;line-height:2.2}
.legend .tag{margin-left:10px}
table{width:100%;border-collapse:collapse;font-size:13px;margin-top:10px}
th,td{padding:7px 8px;border-bottom:1px solid var(--line);text-align:left}
th{color:var(--muted);font-weight:500}
td.mono{white-space:nowrap}
.ub{background:var(--panel2);border-radius:12px;padding:14px;display:flex;justify-content:space-between;align-items:center}
.st{font-weight:700;font-size:13px;padding:3px 10px;border-radius:999px}
.st.yes{background:rgba(34,197,94,.15);color:var(--ok)}.st.no{background:rgba(239,68,68,.15);color:var(--bad)}.st.partial{background:rgba(245,158,11,.15);color:var(--warn)}.st.unknown{background:#334155;color:#cbd5e1}
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.plan{background:var(--panel2);border:1px solid var(--line);border-radius:14px;padding:20px;display:flex;flex-direction:column;position:relative}
.plan.featured{border-color:var(--brand);box-shadow:0 0 0 1px var(--brand),0 10px 30px rgba(79,140,255,.15)}
.plan .ptag{position:absolute;top:-11px;right:16px;font-size:12px;background:linear-gradient(90deg,var(--brand),var(--brand2));color:#fff;padding:2px 10px;border-radius:999px}
.plan h3{margin:0 0 6px}
.plan .price{font-size:20px;font-weight:700;margin-bottom:10px}
.plan ul{list-style:none;padding:0;margin:0 0 12px}
.plan li{padding:3px 0}.plan li:before{content:"✓ ";color:var(--ok)}
.plan .note{color:var(--muted);font-size:12.5px;margin-bottom:14px;flex:1}
.foot{color:var(--muted);font-size:13px;padding:10px 20px 40px;text-align:center}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--panel);color:var(--text);border:1px solid var(--line);padding:10px 18px;border-radius:10px;z-index:99}
.brand{color:var(--text);text-decoration:none}
.theme-btn{margin-left:14px;background:transparent;border:1px solid var(--line);color:var(--text);border-radius:8px;width:32px;height:30px;cursor:pointer}
.crumbs{font-size:12.5px;color:var(--muted);margin-bottom:14px}.crumbs a{color:var(--muted);text-decoration:none}
h1 small{font-size:17px}
.facts{margin:26px 0 0}.facts .h3,.h3{font-size:17px;margin:0 0 8px}.facts ul{margin:0;padding-left:20px}.facts li{margin:4px 0}
.prose h2{margin:0 0 10px;font-size:21px}.prose h3{font-size:16.5px;margin:18px 0 6px}.prose p,.prose li{color:var(--text)}.prose li{margin:4px 0}
details{border-bottom:1px solid var(--line);padding:4px 0}details summary{cursor:pointer;list-style:none;padding:8px 0}details summary::-webkit-details-marker{display:none}
details summary h3{display:inline;font-size:15.5px;margin:0}details summary:before{content:"＋ ";color:var(--brand)}details[open] summary:before{content:"－ "}details p{margin:0 0 10px;color:var(--muted)}
.table-wrap{overflow-x:auto}
.charts{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:10px 0}
.chart{background:var(--panel2);border-radius:12px;padding:12px}.chart svg{width:100%;height:auto;display:block}
.chart-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px;font-size:13.5px}
.legend2 span{margin-left:10px;color:var(--muted);font-size:12px}.legend2 i{display:inline-block;width:10px;height:3px;margin-right:4px;vertical-align:middle;border-radius:2px}
@media (max-width:520px){.bh-grid{grid-template-columns:1fr}}
@media (max-width:860px){.hero-grid,.plans,.charts{grid-template-columns:1fr}.theme-btn{margin-left:8px}nav a.nav-cta{padding:5px 10px}.card{padding:16px}.term{font-size:11.5px}.bh-grid{grid-template-columns:1fr 1fr}.speed-grid{grid-template-columns:1fr 1fr}h1{font-size:32px}}
/* ---- multi-page / nav ---- */
nav a.on{color:var(--text);font-weight:700}
.menu-btn{display:none;background:transparent;border:1px solid var(--line);color:var(--text);border-radius:8px;width:38px;height:34px;font-size:18px;cursor:pointer}
#mainNav{display:flex;align-items:center}
.page-head{padding:34px 0 18px;background:radial-gradient(800px 300px at 10% -20%,rgba(79,140,255,.18),transparent)}
.page-head h1{font-size:32px;margin:0 0 8px}
.page-head .sub{margin:0 0 6px;max-width:860px}
.foot-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 16px;margin-bottom:10px}
.foot-nav a{color:var(--muted);text-decoration:none}.foot-nav a:hover{color:var(--text)}
.credits{max-width:880px;margin:8px auto}
.page-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:14px}
.page-cards a{display:block;background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:14px;text-decoration:none;color:var(--text)}
.page-cards a:hover{border-color:var(--brand)}.page-cards b{display:block;margin-bottom:4px}.page-cards span{color:var(--muted);font-size:13px}
.mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.mini{display:flex;justify-content:space-between;align-items:center;gap:8px;background:var(--panel2);border-radius:10px;padding:10px 14px;text-decoration:none;color:var(--text);font-size:14px}
.mini span{color:var(--muted)}.mini i{font-style:normal;color:var(--muted);font-size:12.5px}
.facts h2{font-size:18px;margin:0 0 8px}
a.bh{display:block;color:var(--text);text-decoration:none}
.term.short{min-height:120px;max-height:320px}
.term.compact{min-height:0;max-height:120px;font-size:12px;color:var(--muted)}
#ntView:empty{display:none}
/* ---- NextTrace-style results ---- */
.nt-sum{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;margin:14px 0 10px;font-size:14px}
.nt-grid{display:grid;grid-template-columns:1fr;gap:12px}
.nt-map svg.route-map{width:100%;height:auto;display:block;border-radius:12px;border:1px solid var(--line);max-height:460px}
table.hops td{vertical-align:top}
table.hops tr.seg td:first-child{box-shadow:inset 4px 0 0 var(--seg);padding-left:12px;font-weight:700}
table.hops tr.seg-none td:first-child{box-shadow:inset 4px 0 0 #94a3b8;padding-left:12px}
.nowrap{white-space:nowrap}
.share-btn[hidden]{display:none}
/* ---- share modal ---- */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:50;display:flex;align-items:center;justify-content:center;padding:20px}
.modal[hidden]{display:none}
.modal-box{background:var(--panel);border:1px solid var(--line);border-radius:16px;max-width:560px;width:100%;max-height:92vh;display:flex;flex-direction:column}
.modal-head,.modal-actions{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:12px 16px}
.modal-actions{justify-content:flex-start;flex-wrap:wrap}
.modal-body{overflow:auto;padding:0 16px}.modal-body img{width:100%;border-radius:10px;display:block}
@media (max-width:1000px){
  .menu-btn{display:block}
  #mainNav{display:none;position:absolute;top:58px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--panel);border-bottom:1px solid var(--line);padding:8px 16px}
  #mainNav.open{display:flex}
  #mainNav a{display:block!important;margin:0;padding:10px 4px;border-bottom:1px solid var(--line)}
  #mainNav .nav-cta{text-align:center}
  #mainNav .theme-btn{margin:10px 0 4px}
  .page-cards,.mini-grid{grid-template-columns:1fr}
  .page-head h1{font-size:25px}
}
.foot-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 28px;margin-bottom:12px;font-size:13.5px}
.foot-links div{display:flex;flex-wrap:wrap;gap:6px 12px;align-items:center}
.foot-links a{color:var(--muted)}.foot-links a:hover{color:var(--text)}

.plan-links{display:flex;flex-wrap:wrap;gap:.6rem;margin:1rem 0 .4rem}

/* results grid */
.res-sum{margin:0 0 14px;font-size:15px}
.res-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.res-block{margin:0;min-width:0}
.res-table{table-layout:fixed;width:100%;margin:0;font-size:13.5px}
.res-table caption{caption-side:top;text-align:left;font-weight:700;font-size:14px;padding:0 0 6px}
.res-table th,.res-table td{text-align:center;padding:8px 4px;border-bottom:1px solid var(--line);vertical-align:middle}
.res-table thead th{color:var(--muted);font-weight:600;font-size:12.5px}
.res-table tbody th{width:3.2em;color:var(--muted);font-weight:600;text-align:left}
.res-table td b{font-size:16px;display:block;line-height:1.2}
.res-sub{display:block;color:var(--muted);font-size:11px;line-height:1.3;margin-top:3px}
.res-sub.bad{color:var(--bad)}
.ln{display:inline-block;max-width:100%;padding:2px 8px;border-radius:999px;font-size:12px;font-weight:600;text-decoration:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;border:1px solid transparent}
.ln-gia{background:rgba(34,197,94,.15);color:#16a34a;border-color:rgba(34,197,94,.35)}
.ln-gt{background:rgba(132,204,22,.15);color:#65a30d;border-color:rgba(132,204,22,.35)}
.ln-9929{background:rgba(79,140,255,.15);color:var(--brand);border-color:rgba(79,140,255,.35)}
.ln-cmin2{background:rgba(168,85,247,.15);color:#a855f7;border-color:rgba(168,85,247,.35)}
.ln-cmi{background:rgba(245,158,11,.15);color:#d97706;border-color:rgba(245,158,11,.35)}
.ln-std{background:rgba(148,163,184,.15);color:var(--muted);border-color:var(--line)}
.ln-none{color:var(--muted)}
.res-block figcaption{margin-top:6px}
.chip{display:inline-block;padding:1px 8px;border-radius:999px;font-size:12px;border:1px solid var(--line)}
.chip.ok{color:var(--ok);border-color:rgba(34,197,94,.4)}
.chip.no{color:var(--bad);border-color:rgba(239,68,68,.4)}
@media (max-width:760px){.res-grid{grid-template-columns:1fr}.res-table{font-size:12.5px}.ln{font-size:11px;padding:2px 6px}.res-table tbody th{width:2.6em}}

/* hop table */
table.hops{table-layout:fixed;width:100%}
table.hops col.c-n{width:52px}table.hops col.c-ip{width:24%}table.hops col.c-geo{width:19%}table.hops col.c-net{width:auto}table.hops col.c-rtt{width:136px}table.hops col.c-tag{width:76px}
table.hops th{white-space:nowrap}
table.hops td{word-break:normal;overflow-wrap:anywhere}
table.hops .h-geo{min-width:7em}
table.hops .h-host{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
table.hops .h-rtt{white-space:nowrap}
table.hops tr.hop-priv td,table.hops tr.hop-x td{padding-top:5px;padding-bottom:5px;opacity:.75}
@media (max-width:900px){table.hops col.c-rtt{width:120px}table.hops col.c-ip{width:28%}}
@media (max-width:640px){
 .hops-wrap{overflow:visible}
 table.hops,table.hops tbody{display:block;width:100%}
 table.hops colgroup,table.hops thead{display:none}
 table.hops tr{display:grid;grid-template-columns:2.6em minmax(0,1fr) auto;gap:2px 8px;padding:8px 6px 8px 10px;border-bottom:1px solid var(--line)}
 table.hops td{display:block;border:0;padding:0;min-width:0}
 table.hops tr.seg td:first-child,table.hops tr.seg-none td:first-child{box-shadow:none;padding-left:0}
 table.hops tr.seg{box-shadow:inset 3px 0 0 var(--seg)}
 table.hops tr.seg-none{box-shadow:inset 3px 0 0 #94a3b8}
 table.hops .h-n{grid-column:1;grid-row:1;font-weight:700}
 table.hops .h-ip{grid-column:2;grid-row:1 / span 2;display:contents}
 table.hops .h-ip>.mono{grid-column:2;grid-row:1;font-weight:600}
 table.hops .h-ip .h-host{grid-column:2 / 4;grid-row:auto;order:5}
 table.hops .h-rtt{grid-column:3;grid-row:1;text-align:right;font-size:12px}
 table.hops .h-geo,table.hops .h-net{grid-column:2 / 4;font-size:12.5px;display:inline}
 table.hops .h-geo{grid-row:2;grid-column:2}table.hops .h-net{grid-row:3}
 table.hops .h-net div{display:inline;margin-left:6px}
 table.hops .h-tag{grid-column:3;grid-row:2;text-align:right}
 table.hops .h-tag:empty{display:none}
 table.hops .h-x{grid-column:2 / 4;grid-row:2;font-size:12px}
 table.hops tr.hop-x .h-x{grid-row:1;grid-column:2 / 4}
 table.hops tr.hop-x .h-ip{display:none}
}
table.hops .h-n{white-space:nowrap}
table.hops .h-net .mono{font-family:inherit}

/* plan states */
.plan .btn{text-align:center}
.plan .oos{display:inline-block;vertical-align:middle;font-size:11.5px;font-weight:600;color:#b45309;background:rgba(245,158,11,.14);border:1px solid rgba(245,158,11,.4);padding:1px 8px;border-radius:999px;margin-left:4px}
[data-theme=dark] .plan .oos,:root:not([data-theme=light]) .plan .oos{color:#fbbf24}
.plan.soldout .price{opacity:.65}
.plan.soldout .ptag{background:#94a3b8}
.btn.restock{background:transparent;color:#d97706;border:1.5px solid #f59e0b}
.btn.restock:hover{background:rgba(245,158,11,.1)}
.conclusion{margin:10px 0 14px;padding:10px 14px;border-left:3px solid var(--brand);background:color-mix(in srgb,var(--brand) 10%,transparent);border-radius:8px;font-size:15px;line-height:1.6}
.card.conclusion{margin:18px 0 0}
.byline{margin-top:4px}