:root{
  --bg:#0d0f10;
  --card:#151819;
  --card2:#1b1f20;
  --line:#2a3031;
  --text:#f3f6f5;
  --muted:#9ca7a4;
  --green:#7fdc67;
  --green2:#a3ef8f;
  --danger:#ff7979;
  --shadow:0 18px 50px rgba(0,0,0,.25);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:
    radial-gradient(circle at 90% 0%, rgba(127,220,103,.09), transparent 32rem),
    linear-gradient(180deg,#101314 0%,#0b0d0e 100%);
  color:var(--text);
  font-family:Inter,"Noto Sans TC","PingFang TC","Microsoft JhengHei",system-ui,sans-serif;
  min-height:100vh;
}
a{color:inherit}
.topbar{
  width:min(1180px,calc(100% - 32px));
  margin:0 auto;
  min-height:76px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;
  background:var(--green);color:#101410;font-weight:900;
  box-shadow:0 0 0 6px rgba(127,220,103,.08);
}
.brand-name{font-weight:800;letter-spacing:.02em}
.brand-sub{font-size:10px;color:var(--muted);letter-spacing:.18em;margin-top:2px}
.admin-link{
  text-decoration:none;
  padding:10px 14px;
  border:1px solid var(--line);
  border-radius:12px;
  color:#dbe1df;
  font-size:14px;
}
.shell{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:56px 0 34px}
.hero{display:flex;justify-content:space-between;gap:30px;align-items:flex-end;margin-bottom:30px}
.eyebrow{font-size:11px;font-weight:800;letter-spacing:.16em;color:var(--green)}
.hero h1{font-size:clamp(38px,7vw,72px);line-height:.95;margin:10px 0 18px;letter-spacing:-.04em}
.hero p{max-width:740px;color:var(--muted);font-size:16px;line-height:1.8;margin:0}
.hero-status{
  flex:0 0 auto;
  display:flex;align-items:center;gap:10px;
  border:1px solid var(--line);background:rgba(255,255,255,.02);
  padding:10px 14px;border-radius:999px;color:#d6ddda;font-size:13px;
}
.pulse-dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 7px rgba(127,220,103,.1)}
.grid{display:grid;grid-template-columns:1.08fr .92fr;gap:20px}
.panel{
  background:linear-gradient(180deg,rgba(26,30,31,.96),rgba(18,21,22,.98));
  border:1px solid var(--line);
  border-radius:22px;
  box-shadow:var(--shadow);
}
.form-panel,.speed-panel,.history-panel{padding:24px}
.panel-title{display:flex;align-items:flex-start;gap:14px;margin-bottom:22px}
.panel-title>span{
  display:grid;place-items:center;min-width:42px;height:28px;border-radius:999px;
  background:rgba(127,220,103,.12);color:var(--green);font-size:12px;font-weight:900
}
.panel-title h2{margin:0;font-size:19px}
.panel-title p{margin:5px 0 0;color:var(--muted);font-size:13px;line-height:1.5}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{display:flex;flex-direction:column;gap:8px}
.field>span{font-size:12px;color:#c7cfcc;font-weight:700}
input,select,textarea{
  width:100%;border:1px solid #313738;background:#101314;color:var(--text);
  border-radius:12px;padding:13px 14px;outline:none;font:inherit;
  transition:border-color .2s,box-shadow .2s;
}
input:focus,select:focus,textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(127,220,103,.08)}
textarea{resize:vertical;min-height:92px}
.full{margin-top:14px}
.info-strip{
  display:grid;grid-template-columns:1fr 1.2fr .8fr;gap:10px;margin-top:18px
}
.info-strip>div{background:#0f1213;border:1px solid #272c2d;padding:12px;border-radius:12px;min-width:0}
.info-strip b{display:block;font-size:10px;color:var(--green);letter-spacing:.09em;margin-bottom:5px}
.info-strip span{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:12px;color:#d6ddda}
.browser-note{
  margin-top:14px;padding:12px 14px;border-radius:12px;
  background:rgba(255,255,255,.025);border:1px dashed #333a3b;
  color:#9da8a5;font-size:12px;line-height:1.65
}
.speed-panel{display:flex;flex-direction:column}
.speed-gauge{display:flex;flex-direction:column;align-items:center;padding:10px 0 18px}
.gauge-ring{
  width:180px;height:180px;border-radius:50%;
  display:grid;place-content:center;text-align:center;
  background:
    radial-gradient(circle at center,#111415 0 57%,transparent 58%),
    conic-gradient(var(--green) calc(var(--gauge,0)*1%),#2b3132 0);
  box-shadow:inset 0 0 35px rgba(127,220,103,.08),0 18px 50px rgba(0,0,0,.2)
}
.gauge-value{font-size:48px;line-height:1;font-weight:900;letter-spacing:-.05em}
.gauge-unit{font-size:12px;color:var(--muted);margin-top:6px}
.gauge-label{font-size:13px;color:var(--muted);margin-top:14px}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:8px 0 18px}
.metric{background:#0f1213;border:1px solid #272c2d;border-radius:12px;padding:12px 10px;text-align:center}
.metric span{display:block;font-size:9px;letter-spacing:.08em;color:var(--muted)}
.metric strong{display:block;font-size:22px;margin-top:5px}
.metric small{font-size:10px;color:#7f8a87}
.progress-wrap{margin:2px 0 16px}
.progress-track{height:7px;border-radius:999px;background:#252b2c;overflow:hidden}
.progress-bar{height:100%;width:0;background:linear-gradient(90deg,var(--green),var(--green2));transition:width .2s}
.progress-copy{display:flex;justify-content:space-between;color:var(--muted);font-size:11px;margin-top:7px}
button{font:inherit}
.primary-btn,.secondary-btn{
  width:100%;border-radius:14px;padding:15px 18px;font-weight:900;cursor:pointer;
  border:0;transition:transform .15s,opacity .15s
}
.primary-btn{background:var(--green);color:#0c110c}
.primary-btn:hover,.secondary-btn:hover{transform:translateY(-1px)}
.primary-btn:disabled{cursor:not-allowed;opacity:.5;transform:none}
.secondary-btn{background:#252a2b;color:#e7ecea;margin-top:8px;border:1px solid #343b3c}
.result-summary{margin-top:14px;border-radius:14px;padding:14px;background:#0f1213;border:1px solid #2b3233;color:#cfd7d4;font-size:13px;line-height:1.6}
.history-panel{margin-top:20px}
.history-list{display:grid;gap:10px}
.history-empty{border:1px dashed #343a3b;border-radius:14px;padding:22px;color:var(--muted);text-align:center;font-size:13px}
.history-item{
  display:grid;grid-template-columns:minmax(130px,1.3fr) repeat(4,.65fr) minmax(130px,1fr);
  gap:10px;align-items:center;border:1px solid #2b3132;background:#101314;border-radius:14px;padding:13px 14px
}
.history-item .who strong{display:block;font-size:13px}
.history-item .who span,.history-item .stamp{display:block;color:var(--muted);font-size:11px;margin-top:3px}
.history-item .hv{text-align:center}
.history-item .hv b{display:block;font-size:14px}
.history-item .hv span{font-size:9px;color:var(--muted);letter-spacing:.06em}
.history-item .stamp{text-align:right}
.contact-card{
  margin-top:20px;padding:24px;border-radius:22px;border:1px solid #324035;
  background:linear-gradient(110deg,rgba(127,220,103,.12),rgba(127,220,103,.03));
  display:flex;justify-content:space-between;align-items:center;gap:20px
}
.contact-card h2{margin:7px 0 6px;font-size:22px}
.contact-card p{margin:0;color:var(--muted);font-size:13px}
.contact-tags{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.contact-tags span{border:1px solid rgba(127,220,103,.26);background:rgba(0,0,0,.16);padding:9px 12px;border-radius:999px;font-size:12px}
footer{
  width:min(1180px,calc(100% - 32px));margin:0 auto;padding:24px 0 34px;
  display:flex;justify-content:space-between;color:#68716f;font-size:11px
}
.admin-shell{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:42px 0}
.admin-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:22px}
.admin-head h1{margin:8px 0 0;font-size:34px}
.admin-actions{display:flex;gap:8px;flex-wrap:wrap}
.small-btn{border:1px solid #32393a;background:#151819;color:#dfe5e3;padding:10px 12px;border-radius:10px;cursor:pointer}
.small-btn.danger{color:#ffc1c1;border-color:#5b3434}
.admin-note{margin-bottom:18px;padding:14px;border:1px solid #3c433a;background:rgba(127,220,103,.05);border-radius:14px;color:#bdc8c3;font-size:13px;line-height:1.6}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#121516}
table{width:100%;border-collapse:collapse;min-width:980px}
th,td{padding:12px 13px;border-bottom:1px solid #252b2c;text-align:left;font-size:12px;white-space:nowrap}
th{color:#aeb8b5;background:#171b1c;font-size:10px;letter-spacing:.06em}
td{color:#d9dfdd}
td.muted{color:#8f9996}
.backlink{color:var(--green);text-decoration:none;font-size:13px}
@media(max-width:860px){
  .shell{padding-top:36px}
  .hero{align-items:flex-start;flex-direction:column}
  .hero-status{align-self:flex-start}
  .grid{grid-template-columns:1fr}
  .history-item{grid-template-columns:1.3fr repeat(2,.7fr)}
  .history-item .upload,.history-item .jitter{display:none}
  .history-item .stamp{text-align:left}
  .contact-card{align-items:flex-start;flex-direction:column}
  .contact-tags{justify-content:flex-start}
}
@media(max-width:560px){
  .topbar,.shell,footer,.admin-shell{width:min(100% - 20px,1180px)}
  .topbar{min-height:66px}
  .admin-link{font-size:12px;padding:8px 10px}
  .shell{padding-top:28px}
  .hero h1{font-size:44px}
  .hero p{font-size:14px}
  .form-panel,.speed-panel,.history-panel{padding:17px;border-radius:18px}
  .form-grid{grid-template-columns:1fr}
  .info-strip{grid-template-columns:1fr}
  .gauge-ring{width:160px;height:160px}
  .metrics{grid-template-columns:1fr 1fr}
  .history-item{grid-template-columns:1.2fr .8fr .8fr}
  .history-item .ping{display:none}
  footer{flex-direction:column;gap:6px}
  .admin-head{align-items:flex-start;flex-direction:column}
}