:root {
  --bg: #0b0f1a;
  --bg1: #101728;
  --card: #141b2b;
  --card2: #1b2438;
  --line: #2a3348;
  --text: #f4f6fb;
  --muted: #8b93a7;
  --accent: #6e9cff;
  --accent2: #8b5bff;
  --green: #3ddc97;
  --orange: #f0b429;
  --red: #ff6b81;
  --wrap: 1080px;
  --radius: 16px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(720px 380px at 8% -10%, rgba(110,156,255,.14), transparent 55%),
    radial-gradient(640px 420px at 92% 0%, rgba(139,91,255,.1), transparent 50%),
    var(--bg);
  color: var(--text); min-height: 100vh; line-height: 1.65;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 40; background: var(--card); padding: 8px 12px; border-radius: 8px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.site-header {
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  position: sticky; top: 0; z-index: 20;
  background: rgba(11,15,26,.86);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px; gap: 16px; position: relative;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; letter-spacing: .2px; }
.brand:hover { text-decoration: none; }
.logo {
  width: 28px; height: 28px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 6px 18px rgba(110,156,255,.32);
}
.nav-toggle-input { position: absolute; opacity: 0; pointer-events: none; }
.nav-toggle {
  display: none; cursor: pointer; color: var(--text); font-size: 14px; font-weight: 650;
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px;
}
.site-nav { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.site-nav a { color: var(--muted); font-size: 14px; font-weight: 550; padding: 6px 10px; border-radius: 8px; }
.site-nav a:hover { color: var(--text); text-decoration: none; background: rgba(255,255,255,.04); }
.site-nav a.lang { color: var(--text); border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; }
.crumbs { font-size: 13px; color: var(--muted); margin: 22px 0 8px; display: flex; gap: 8px; flex-wrap: wrap; }
.crumbs a { color: var(--muted); }
.hero { padding: 48px 0 8px; }
.eyebrow { letter-spacing: 1.2px; font-size: 13px; color: var(--accent); margin-bottom: 10px; font-weight: 650; }
h1 { font-size: clamp(28px, 4.2vw, 40px); line-height: 1.22; font-weight: 750; margin: 8px 0 14px; letter-spacing: .1px; }
.lead { font-size: 17px; color: #c5cde0; max-width: 720px; margin-bottom: 8px; }
.lead-sm { color: var(--muted); margin: 0 0 16px; }
h2, .section-title { font-size: 22px; margin: 0 0 14px; font-weight: 700; }
h3 { font-size: 17px; margin: 18px 0 8px; }
.prose p, .prose li, .facts { color: #c3cce0; }
.prose ul, .prose ol { padding-left: 20px; margin: 8px 0 16px; }
.prose table { width: 100%; border-collapse: collapse; margin: 12px 0 20px; font-size: 14px; }
.prose th, .prose td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }
pre { background: rgba(0,0,0,.28); padding: 14px; border-radius: 12px; overflow: auto; font-size: 13px; margin: 12px 0 20px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.cards { margin: 40px 0 8px; }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.card {
  display: flex; flex-direction: column; gap: 8px; padding: 18px;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); color: var(--text);
}
.card:hover { border-color: rgba(110,156,255,.45); text-decoration: none; }
.card span { color: var(--muted); font-size: 13px; line-height: 1.5; }
.facts { padding-left: 18px; }
.facts-box, .related, .keyfact {
  border: 1px solid var(--line); background: var(--card); border-radius: 14px; padding: 16px 18px; margin: 18px 0;
}
.keyfact { border-left: 3px solid var(--accent); }
.meta-line { font-size: 13px; color: var(--muted); margin: 24px 0; }
.source-list { padding-left: 18px; margin: 0 0 20px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  margin: 16px 0 8px; padding: 10px 18px; border-radius: 10px; border: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff !important; font-weight: 650; cursor: pointer; font: inherit;
}
.btn:hover { text-decoration: none; filter: brightness(1.06); }
.site-footer { margin-top: 64px; padding: 28px 0 48px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.footer-grid { display: grid; gap: 14px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; }
.footer-links a { color: var(--muted); }
.muted { color: #6a7388; }

.dropzone {
  border: 1.5px dashed rgba(110,156,255,.42); border-radius: 20px; background: var(--card);
  padding: 44px 22px; text-align: center; cursor: pointer; margin: 20px 0 16px;
}
.dropzone:hover, .dropzone.drag { border-color: var(--accent); background: rgba(110,156,255,.08); }
.dz-icon { font-size: 22px; color: var(--accent); margin-bottom: 4px; }
.dz-title { font-weight: 650; margin: 8px 0; font-size: 18px; }
.dz-hint { color: var(--muted); font-size: 13.5px; max-width: 640px; margin: 0 auto 14px; }
.dz-cta { margin: 8px 0 0; pointer-events: none; }
#fileInput, #signFile { display: none; }
[hidden] { display: none !important; }
.progress { text-align: center; padding: 28px 0; color: var(--muted); }
.spinner {
  width: 34px; height: 34px; margin: 0 auto 10px;
  border: 3px solid rgba(120,150,220,.2); border-top-color: var(--accent);
  border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.how { margin: 40px 0 12px; }
.how-list { list-style: none; display: grid; gap: 10px; }
.how-list li {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px;
}
.how-n {
  flex: 0 0 36px; height: 36px; border-radius: 18px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(110,156,255,.18); color: var(--accent); font-weight: 750;
}
.how-list p { color: var(--muted); font-size: 14px; margin-top: 2px; }
.faq {
  border: 1px solid var(--line); background: var(--card); border-radius: 12px;
  padding: 0 16px; margin: 8px 0;
}
.faq summary { cursor: pointer; font-weight: 650; padding: 14px 0; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--muted); font-weight: 400; }
.faq[open] summary::after { content: "–"; }
.faq p { color: #c3cce0; padding: 0 0 14px; }
.more { margin-top: 36px; }

.summary {
  display: flex; gap: 12px; flex-wrap: wrap; margin: 8px 0 16px;
  padding: 12px 16px; border: 1px solid var(--line); border-radius: 14px; background: var(--card);
}
.results { display: flex; flex-direction: column; gap: 18px; }
.report {
  border: 1px solid var(--line); border-radius: 20px; background: var(--card); overflow: hidden;
}
.report-head { display: flex; gap: 20px; padding: 22px; align-items: flex-start; }
.thumb-frame {
  flex: 1 1 360px;
  min-width: 0;
  max-width: 100%;
  display: flex; align-items: center; justify-content: center;
  background: var(--card2); border: 1px solid var(--line); border-radius: 14px;
  overflow: hidden;
}
.thumb {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: min(70vh, 640px);
  object-fit: contain;
  object-position: center;
  background: transparent;
}
.verdict { flex: 1; min-width: 0; }
.verdict h3 { font-size: 24px; margin: 10px 0 8px; line-height: 1.3; }
.verdict .explain { color: var(--muted); font-size: 15px; margin-bottom: 8px; }
.file-line { font-size: 13px; color: var(--muted); }
.badge { display: inline-flex; gap: 6px; padding: 5px 12px; border-radius: 999px; font-size: 13px; font-weight: 700; }
.badge.verified, .badge.native { color: var(--green); border: 1px solid rgba(61,220,151,.4); background: rgba(61,220,151,.12); }
.badge.strong_evidence, .badge.present_untrusted, .badge.roma_trusted { color: #b79aff; border: 1px solid rgba(139,91,255,.4); background: rgba(139,91,255,.12); }
.badge.partial_evidence, .badge.uncertain, .badge.suspect { color: var(--orange); border: 1px solid rgba(240,180,41,.4); background: rgba(240,180,41,.12); }
.badge.unknown, .badge.not_found { color: var(--muted); border: 1px solid rgba(140,150,170,.35); }
.badge.invalid, .badge.likely_upscaled, .badge.upscaled, .badge.conflicting, .badge.binding_failed { color: var(--red); border: 1px solid rgba(255,107,129,.4); background: rgba(255,107,129,.12); }
.understand li.bad { color: #ffb3c0; }
.metrics {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px;
  padding: 0 22px 18px;
}
.metrics-wide { grid-template-columns: repeat(3, 1fr); }
.understand li.ok { color: #b8e6cf; }
.understand li.warn { color: #d7c7a1; }
.understand li.info { color: #b0bad0; }
.metric {
  background: var(--card2); border-radius: 12px; padding: 12px;
  min-width: 0;
}
.metric span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.metric b { display: block; font-size: 14px; color: var(--text); word-break: break-word; }
.metric small { display: block; font-size: 12px; color: var(--muted); font-weight: 500; margin-top: 4px; line-height: 1.45; white-space: pre-line; }
.metric b.ok { color: var(--green); }
.metric b.warn { color: var(--orange); }
.metric b.bad { color: var(--red); }
.metric b.dim { color: var(--muted); font-weight: 600; }
.report details.details {
  border-top: 1px solid var(--line);
}
.report details.details > summary {
  list-style: none; cursor: pointer; padding: 14px 22px;
  display: flex; justify-content: space-between; gap: 12px; align-items: center;
  color: var(--accent); font-weight: 650; font-size: 14px;
}
.report details.details > summary::-webkit-details-marker { display: none; }
.report details.details > summary .hint { color: var(--muted); font-weight: 400; font-size: 12px; }
.ev-list { padding: 0 8px 16px; }
.ev-item { border-top: 1px solid var(--line); }
.ev-item > button {
  width: 100%; text-align: left; background: none; border: 0; color: var(--text);
  padding: 12px 16px; cursor: pointer; font: inherit; display: flex; justify-content: space-between; gap: 12px;
}
.ev-item > button span { color: var(--muted); font-size: 13px; }
.ev-item .ev-detail { display: none; background: rgba(0,0,0,.18); color: #b0bad0; font-size: 13.5px; padding: 0 16px 12px; line-height: 1.6; }
.ev-item .ev-detail.on { display: block; }
.ev-item .ev-detail p { margin: 0 0 8px; }
.warns { padding: 12px 22px; color: #d7c7a1; font-size: 13.5px; background: rgba(240,180,41,.08); border-top: 1px solid var(--line); }
.warns ul { padding-left: 18px; margin: 6px 0 0; }
.again-btn {
  display: none; margin: 24px auto 8px; padding: 11px 28px; border: 0; border-radius: 12px;
  color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent2)); font-weight: 650; cursor: pointer;
}
.again-btn.on { display: block; }
.spec-panel {
  display: none;
  background: rgba(0,0,0,.18);
  padding: 0 16px 14px;
}
.spec-panel.on { display: block; }
.spec-canvas {
  display: block; width: 100%; height: 200px;
  border-radius: 12px; border: 1px solid var(--line);
  background: #0c1220;
}
.sign-form, .form-grid { display: grid; gap: 14px; margin: 18px 0; }
.form-grid label, .sign-form label { font-size: 13px; color: var(--muted); }
.form-grid input, .form-grid select, .sign-form input, .sign-form select {
  display: block; width: 100%; margin-top: 6px; padding: 10px 12px;
  border-radius: 10px; border: 1px solid var(--line); background: #0c1220; color: var(--text); font: inherit;
}
.form-inline { display: flex; gap: 10px; flex-wrap: wrap; margin: 12px 0; }
.form-inline input, .form-inline select {
  flex: 1; min-width: 160px; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: #0c1220; color: var(--text); font: inherit;
}
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; word-break: break-all; }
.cred-layout { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: start; }
.qr-box { width: 160px; height: 160px; padding: 10px; background: #fff; border-radius: 12px; }
.qr-box svg { width: 100%; height: 100%; }
.related ul { padding-left: 18px; }
.related h2 { margin-bottom: 8px; }

.sd-step { margin: 28px 0 8px; }
.sd-step-title { display: flex; align-items: center; gap: 12px; font-size: 19px; margin: 0 0 12px; }
.sd-step .dropzone { margin-top: 4px; }
.choice-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.choice {
  position: relative; display: flex; flex-direction: column; gap: 4px; padding: 16px 18px; cursor: pointer;
  border: 1.5px solid var(--line); border-radius: 14px; background: var(--card);
}
.choice input { position: absolute; opacity: 0; pointer-events: none; }
.choice:hover { border-color: rgba(110,156,255,.45); }
.choice:has(input:checked) { border-color: var(--accent); background: rgba(110,156,255,.1); box-shadow: 0 0 0 1px var(--accent) inset; }
.choice:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }
.choice-title { font-weight: 700; font-size: 16px; }
.choice-desc { color: var(--muted); font-size: 13px; line-height: 1.45; }
.sd-results { margin-top: 28px; }
.sd-summary { margin-bottom: 14px; }
.sd-head { display: flex; gap: 18px; padding: 22px; align-items: flex-start; }
.sd-mark {
  flex: 0 0 56px; height: 56px; border-radius: 16px; display: inline-flex; align-items: center; justify-content: center;
  font-size: 26px; font-weight: 800; color: var(--muted); background: rgba(140,150,170,.12); border: 1px solid rgba(140,150,170,.3);
}
.sd-mark.verified { color: var(--green); background: rgba(61,220,151,.12); border-color: rgba(61,220,151,.4); }
.sd-mark.invalid { color: var(--red); background: rgba(255,107,129,.12); border-color: rgba(255,107,129,.4); }
.sd-mark.strong_evidence { color: #b79aff; background: rgba(139,91,255,.12); border-color: rgba(139,91,255,.4); }
.sd-card .verdict h3 { font-size: 21px; }
.sd-conflict { color: #d7c7a1; }
.sd-detail { padding: 4px 22px 18px; }
.sd-detail h4 { font-size: 14px; color: var(--muted); margin: 16px 0 8px; font-weight: 650; letter-spacing: .3px; }
.sd-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.sd-table th { text-align: left; font-weight: 600; color: var(--muted); font-size: 12px; padding: 4px 8px; border-bottom: 1px solid var(--line); }
.sd-table td { padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.sd-table .mono { font-size: 12.5px; }
.sd-kv td:first-child { width: 120px; }
.sd-st { white-space: nowrap; font-weight: 650; width: 92px; }
.sd-dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 7px; background: var(--muted); }
.st-pass .sd-st { color: var(--green); } .st-pass .sd-dot { background: var(--green); }
.st-fail .sd-st { color: var(--red); } .st-fail .sd-dot { background: var(--red); }
.st-warn .sd-st { color: var(--orange); } .st-warn .sd-dot { background: var(--orange); }
.st-skip .sd-st { color: var(--muted); }
.sd-baseline { font-size: 13px; color: var(--muted); margin: 16px 0 0; }
.sd-baseline.sd-stale { color: var(--orange); }
.sd-results .again-btn { display: block; }
.lab-hint { padding: 10px 22px 16px; font-size: 13.5px; color: var(--muted); }

.console-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; margin-top: 24px; }
.console-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 20px; }
.console-nav a { color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; font-size: 13px; }
.console-nav a.on, .console-nav a:hover { color: var(--text); text-decoration: none; border-color: var(--accent); }
.tab-panel { margin: 8px 0 24px; }
.ev-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.ev-table td { border-bottom: 1px solid var(--line); padding: 8px 6px; }
.site-nav a.account { border: 1px solid var(--line); border-radius: 999px; }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    width: 100%; z-index: 30;
    background: #0b0f1a; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; padding: 10px 24px 16px; gap: 4px;
  }
  .nav-toggle-input:checked ~ .site-nav { display: flex; }
  .card-grid, .metrics, .metrics-wide { grid-template-columns: 1fr 1fr; }
  .choice-grid { grid-template-columns: 1fr; }
  .report-head { flex-direction: column; }
  .thumb-frame { flex: 1 1 auto; width: 100%; }
  .thumb { max-height: min(75vh, 720px); }
  .cred-layout { grid-template-columns: 1fr; }
  .hero { padding-top: 28px; }
}
@media (max-width: 560px) {
  .card-grid, .metrics, .metrics-wide { grid-template-columns: 1fr; }
}