/* LSR-2026-03 · OPC-inspired visual skin (design only)
   Soft white canvas · blue→violet glow · large radius · airy cards
   Class names match existing markup — no structure/copy changes. */
.ai-page {
  --ai-ink: #1f2329;
  --ai-ink-soft: #4e5969;
  --ai-mute: #86909c;
  --ai-line: rgba(31, 35, 41, 0.08);
  --ai-paper: #f5f7fb;
  --ai-panel: #ffffff;
  --ai-blue: #4a69ff;
  --ai-violet: #9b51ff;
  --ai-grad: linear-gradient(105deg, #4a69ff 0%, #7b6cff 48%, #9b51ff 100%);
  --ai-glow-b: rgba(74, 105, 255, 0.22);
  --ai-glow-v: rgba(155, 81, 255, 0.18);
  --ai-radius: 20px;
  --ai-radius-sm: 14px;
  --ai-shadow: 0 12px 40px rgba(74, 105, 255, 0.08), 0 4px 16px rgba(15, 23, 42, 0.04);
  --ai-shadow-soft: 0 8px 28px rgba(15, 23, 42, 0.06);
  --ai-max: 1160px;
  --ai-display: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --ai-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --ai-mono: "IBM Plex Mono", ui-monospace, monospace;
  margin: 0;
  color: var(--ai-ink);
  background:
    radial-gradient(900px 520px at 12% 8%, var(--ai-glow-b), transparent 60%),
    radial-gradient(800px 480px at 88% 12%, var(--ai-glow-v), transparent 55%),
    radial-gradient(700px 420px at 50% 100%, rgba(74, 105, 255, 0.08), transparent 50%),
    linear-gradient(180deg, #fbfcfe 0%, var(--ai-paper) 40%, #eef2f8 100%);
  font-family: var(--ai-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.ai-page .site-header {
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ai-line);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8);
}

.ai-wrap {
  width: min(100% - 2.25rem, var(--ai-max));
  margin-inline: auto;
}

/* Subnav */
.ai-subnav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(14px);
  color: var(--ai-ink);
  border-bottom: 1px solid var(--ai-line);
  box-shadow: var(--ai-shadow-soft);
}
.ai-subnav-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 56px;
  width: min(100% - 2.25rem, var(--ai-max));
  margin: 0 auto;
  overflow-x: auto;
}
.ai-subnav-brand {
  flex: 0 0 auto;
  font-family: var(--ai-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ai-blue);
  font-weight: 600;
  white-space: nowrap;
}
.ai-subnav-links {
  display: flex;
  gap: 1rem;
  flex: 1;
}
.ai-subnav-links a {
  color: var(--ai-ink-soft);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  font-weight: 500;
}
.ai-subnav-links a:hover { color: var(--ai-blue); }
.ai-subnav-cta {
  flex: 0 0 auto;
  margin-left: auto;
  background: var(--ai-grad);
  color: #fff !important;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  box-shadow: 0 8px 20px rgba(74, 105, 255, 0.28);
}

/* Breadcrumb */
.ai-crumb {
  padding: 0.9rem 0 0;
  font-size: 13px;
  color: var(--ai-mute);
}
.ai-crumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  width: min(100% - 2.25rem, var(--ai-max));
  margin-inline: auto;
}
.ai-crumb a { color: var(--ai-blue); text-decoration: none; }

/* Hero */
.ai-hero {
  position: relative;
  min-height: min(86vh, 760px);
  display: grid;
  align-items: center;
  padding: 4.5rem 0 5rem;
  overflow: hidden;
  isolation: isolate;
}
.ai-hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(70% 60% at 20% 30%, rgba(74, 105, 255, 0.2), transparent 55%),
    radial-gradient(55% 50% at 80% 25%, rgba(155, 81, 255, 0.18), transparent 50%),
    radial-gradient(50% 45% at 55% 85%, rgba(99, 140, 255, 0.12), transparent 55%),
    linear-gradient(180deg, #ffffff 0%, #f4f7fc 100%);
}
.ai-hero-bg::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  right: 8%;
  top: 12%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(155, 81, 255, 0.22), transparent 68%);
  filter: blur(8px);
  animation: aiOrb 8s ease-in-out infinite;
}
.ai-hero-bg::after {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  left: 6%;
  bottom: 8%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74, 105, 255, 0.2), transparent 68%);
  filter: blur(10px);
  animation: aiOrb 9s ease-in-out 0.6s infinite reverse;
}
.ai-hero-inner {
  width: min(100% - 2.25rem, var(--ai-max));
  margin: 0 auto;
  display: grid;
  gap: 0.25rem;
  text-align: center;
  justify-items: center;
}
.ai-brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ai-blue);
  font-weight: 600;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(74, 105, 255, 0.16);
  box-shadow: var(--ai-shadow-soft);
  animation: aiRise 0.7s ease both;
}
.ai-brand-mark i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ai-grad);
  box-shadow: 0 0 0 0 rgba(74, 105, 255, 0.45);
  animation: aiBlink 2s ease-out infinite;
}
.ai-hero h1 {
  margin: 1rem 0 0;
  max-width: 16em;
  font-family: var(--ai-display);
  font-weight: 800;
  font-size: clamp(2rem, 5.2vw, 3.6rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--ai-ink);
  animation: aiRise 0.8s 0.05s ease both;
}
.ai-hero-lead {
  margin: 1rem 0 0;
  max-width: 36rem;
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--ai-blue);
  font-weight: 500;
  animation: aiRise 0.8s 0.12s ease both;
}
.ai-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
  justify-content: center;
  animation: aiRise 0.8s 0.18s ease both;
}
.ai-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.45rem;
  border-radius: 999px;
  font-weight: 650;
  font-size: 15px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}
.ai-btn:hover { transform: translateY(-2px); }
.ai-btn--solid {
  background: var(--ai-grad);
  color: #fff;
  box-shadow: 0 12px 28px rgba(74, 105, 255, 0.32);
}
.ai-btn--solid:hover { filter: brightness(1.05); }
.ai-btn--ghost {
  background: rgba(255, 255, 255, 0.85);
  color: var(--ai-ink-soft);
  border-color: rgba(74, 105, 255, 0.2);
  box-shadow: var(--ai-shadow-soft);
}
.ai-hero-meta {
  display: grid;
  grid-template-columns: 1.5fr 1.1fr 1fr 0.85fr;
  gap: 0;
  margin-top: 2.75rem;
  width: min(100%, 1100px);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--ai-radius);
  box-shadow: var(--ai-shadow);
  overflow: hidden;
  animation: aiRise 0.85s 0.24s ease both;
}
.ai-hero-meta div {
  padding: 1.25rem 1.35rem;
  text-align: left;
  border-right: 1px solid var(--ai-line);
}
.ai-hero-meta div:last-child { border-right: 0; }
.ai-hero-meta div:nth-child(3),
.ai-hero-meta div:nth-child(4) {
  background: var(--ai-grad);
}
.ai-hero-meta div:nth-child(3) dt,
.ai-hero-meta div:nth-child(4) dt {
  color: rgba(255, 255, 255, 0.75);
}
.ai-hero-meta div:nth-child(3) dd,
.ai-hero-meta div:nth-child(4) dd {
  color: #fff;
}
.ai-hero-meta dt {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--ai-mute);
  font-weight: 500;
}
.ai-hero-meta dd {
  margin: 0.35rem 0 0;
  color: var(--ai-ink);
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
}
.ai-id-rail {
  position: absolute;
  right: max(1rem, calc((100vw - var(--ai-max)) / 2 - 0.25rem));
  top: 22%;
  writing-mode: vertical-rl;
  font-family: var(--ai-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: rgba(74, 105, 255, 0.45);
}

/* Sections */
.ai-sec {
  padding: 4.25rem 0;
}
.ai-sec--invert {
  background:
    radial-gradient(80% 70% at 50% 0%, rgba(74, 105, 255, 0.14), transparent 55%),
    linear-gradient(180deg, #1a1f3b 0%, #151933 100%);
  color: #f2f5ff;
}
.ai-sec--panel {
  background: transparent;
}
.ai-sec-head {
  display: grid;
  gap: 0.55rem;
  margin-bottom: 1.75rem;
  max-width: 42rem;
}
.ai-sec-kicker {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ai-blue);
  font-weight: 650;
}
.ai-sec--invert .ai-sec-kicker {
  color: #a9b8ff;
}
.ai-sec-head h2 {
  margin: 0;
  font-family: var(--ai-display);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.015em;
}
.ai-sec-desc {
  margin: 0;
  color: var(--ai-mute);
  font-size: 1rem;
}
.ai-sec--invert .ai-sec-desc { color: rgba(242, 245, 255, 0.65); }

/* Status meters */
.ai-meters {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}
.ai-meter {
  padding: 1.35rem 1.15rem 1.2rem;
  background: var(--ai-panel);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--ai-radius);
  box-shadow: var(--ai-shadow-soft);
}
.ai-meter strong {
  display: block;
  font-family: var(--ai-display);
  font-size: clamp(1.7rem, 3.6vw, 2.3rem);
  line-height: 1;
  letter-spacing: -0.03em;
  background: var(--ai-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.ai-meter span {
  display: block;
  margin-top: 0.6rem;
  font-size: 13px;
  color: var(--ai-mute);
  font-weight: 500;
}

/* Key question */
.ai-question {
  font-family: var(--ai-display);
  font-size: clamp(1.45rem, 3.4vw, 2.35rem);
  line-height: 1.3;
  letter-spacing: -0.015em;
  max-width: 18em;
  margin: 0 0 1.25rem;
  font-weight: 800;
}
.ai-prose {
  max-width: 42rem;
  color: var(--ai-ink-soft);
}
.ai-sec--invert .ai-prose { color: rgba(242, 245, 255, 0.78); }
.ai-prose p { margin: 0 0 0.9rem; }
.ai-prose a { color: var(--ai-blue); }

/* Expression chain */
.ai-chain {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
  counter-reset: chain;
}
.ai-chain-item {
  position: relative;
  padding: 1.25rem 1.1rem 1.2rem;
  background: var(--ai-panel);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--ai-radius-sm);
  box-shadow: var(--ai-shadow-soft);
  min-height: 138px;
  counter-increment: chain;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.ai-chain-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--ai-shadow);
}
.ai-chain-item::before {
  content: counter(chain, decimal-leading-zero);
  font-family: var(--ai-mono);
  font-size: 12px;
  color: var(--ai-blue);
  font-weight: 600;
}
.ai-chain-item h3 {
  margin: 0.5rem 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 750;
}
.ai-chain-item p {
  margin: 0;
  font-size: 13px;
  color: var(--ai-mute);
  line-height: 1.5;
}

/* Tools */
.ai-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}
.ai-tool {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.6rem 0.95rem;
  border-radius: 999px;
  background: #fff;
  border: 1px solid rgba(74, 105, 255, 0.12);
  box-shadow: var(--ai-shadow-soft);
  font-size: 13px;
}
.ai-tool b { font-weight: 700; color: var(--ai-ink); }
.ai-tool em {
  font-style: normal;
  color: var(--ai-mute);
  font-size: 12px;
}
.ai-pending {
  display: inline-block;
  margin-top: 1rem;
  font-size: 12px;
  font-weight: 650;
  color: var(--ai-violet);
  background: rgba(155, 81, 255, 0.08);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
}

/* Method matrix */
.ai-matrix {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--ai-panel);
  border-radius: var(--ai-radius);
  overflow: hidden;
  box-shadow: var(--ai-shadow-soft);
}
.ai-matrix th,
.ai-matrix td {
  text-align: left;
  padding: 1rem 1.15rem;
  border-bottom: 1px solid var(--ai-line);
  vertical-align: top;
  font-size: 14px;
}
.ai-matrix tr:last-child th,
.ai-matrix tr:last-child td { border-bottom: 0; }
.ai-matrix th {
  width: 28%;
  font-weight: 700;
  color: var(--ai-ink);
  background: linear-gradient(90deg, rgba(74, 105, 255, 0.06), transparent);
}
.ai-sec--invert .ai-matrix {
  background: rgba(255, 255, 255, 0.06);
  color: #f2f5ff;
  box-shadow: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.ai-sec--invert .ai-matrix th {
  background: rgba(74, 105, 255, 0.16);
  color: #fff;
}
.ai-sec--invert .ai-matrix th,
.ai-sec--invert .ai-matrix td {
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

/* AECI */
.ai-aeci {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 1.15rem;
  align-items: stretch;
}
.ai-aeci-score {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2.1rem;
  border-radius: var(--ai-radius);
  background:
    linear-gradient(145deg, rgba(74, 105, 255, 0.12), rgba(155, 81, 255, 0.08)),
    #fff;
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--ai-shadow);
}
.ai-aeci-score .label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ai-blue);
  font-weight: 700;
}
.ai-aeci-score .num {
  margin: 0.45rem 0;
  font-family: var(--ai-display);
  font-size: clamp(2.8rem, 7vw, 4.6rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  font-weight: 800;
  background: var(--ai-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.ai-aeci-score .num span {
  font-size: 0.35em;
  color: var(--ai-mute);
  letter-spacing: 0;
  -webkit-text-fill-color: var(--ai-mute);
}
.ai-aeci-dims {
  display: grid;
  gap: 0.55rem;
}
.ai-aeci-dim {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.3rem 1rem;
  padding: 0.8rem 0.95rem;
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 12px;
  box-shadow: var(--ai-shadow-soft);
}
.ai-aeci-dim strong { font-size: 14px; font-weight: 700; }
.ai-aeci-dim b {
  font-size: 12px;
  color: var(--ai-blue);
  font-weight: 700;
}
.ai-aeci-dim span {
  grid-column: 1 / -1;
  font-size: 12px;
  color: var(--ai-mute);
}

/* Findings */
.ai-findings {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}
.ai-findings li {
  display: grid;
  grid-template-columns: 2.5rem 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.95rem 1.1rem;
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 14px;
  box-shadow: var(--ai-shadow-soft);
}
.ai-findings li i {
  font-style: normal;
  font-weight: 700;
  color: var(--ai-blue);
  font-size: 13px;
}
.ai-findings li em {
  font-style: normal;
  font-size: 12px;
  color: #fff;
  font-weight: 650;
  background: var(--ai-grad);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
}

/* FAQ */
.ai-faq details {
  border: 0;
  padding: 0;
  margin: 0 0 0.65rem;
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--ai-shadow-soft);
  overflow: hidden;
}
.ai-faq summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
  padding: 1rem 1.15rem;
}
.ai-faq summary::-webkit-details-marker { display: none; }
.ai-faq summary::after {
  content: "+";
  float: right;
  color: var(--ai-blue);
  font-weight: 500;
}
.ai-faq details[open] summary::after { content: "–"; }
.ai-faq p {
  margin: 0;
  padding: 0 1.15rem 1.1rem;
  color: var(--ai-mute);
  max-width: 44rem;
}

/* Timeline */
.ai-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 3px solid rgba(74, 105, 255, 0.25);
}
.ai-timeline li {
  position: relative;
  padding: 0 0 1.45rem 1.35rem;
}
.ai-timeline li::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ai-grad);
  box-shadow: 0 0 0 4px rgba(74, 105, 255, 0.14);
}
.ai-timeline time {
  display: block;
  font-size: 12px;
  color: var(--ai-blue);
  font-weight: 700;
  margin-bottom: 0.2rem;
}
.ai-timeline strong { display: block; margin-bottom: 0.2rem; font-weight: 750; }
.ai-timeline p { margin: 0; color: var(--ai-mute); font-size: 14px; }

/* Survey shell */
.ai-survey-shell {
  background: rgba(255, 255, 255, 0.08);
  color: #f2f5ff;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--ai-radius);
  padding: 1.5rem 1.35rem 1.75rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.ai-survey-shell .rr-survey-intro,
.ai-survey-shell .rr-survey-meta,
.ai-survey-shell .rr-survey-loading,
.ai-survey-shell .rr-noscript {
  color: rgba(242, 245, 255, 0.72);
}
.ai-survey-shell .rr-survey-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}
.ai-survey-shell .rr-survey-meta li {
  font-size: 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
}
.ai-survey-shell .rr-survey-app {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 1rem;
}
.ai-page .rr-survey-options label,
.ai-page .rr-survey-scale label {
  border-radius: 12px !important;
}
.ai-page .rr-survey-options label:has(input:checked),
.ai-page .rr-survey-scale label:has(input:checked) {
  border-color: #7b6cff !important;
  background: rgba(74, 105, 255, 0.12) !important;
}
.ai-page .rr-survey-nav .btn-next {
  background: var(--ai-grad) !important;
  border: 0 !important;
  color: #fff !important;
  border-radius: 999px !important;
  box-shadow: 0 10px 22px rgba(74, 105, 255, 0.35);
}
.ai-page .rr-survey-nav .btn-prev {
  border-radius: 999px !important;
}

/* Cite / footer */
.ai-cite {
  padding: 1.35rem 1.4rem;
  background: #fff;
  border-radius: var(--ai-radius-sm);
  border: 1px solid rgba(74, 105, 255, 0.1);
  box-shadow: var(--ai-shadow-soft);
  border-left: 4px solid transparent;
  border-image: var(--ai-grad) 1;
}
.ai-cite a { color: var(--ai-blue); }
.ai-footer {
  padding: 2.75rem 0 3.25rem;
  background: linear-gradient(180deg, #12162c 0%, #0e1224 100%);
  color: rgba(242, 245, 255, 0.78);
}
.ai-footer-inner {
  width: min(100% - 2.25rem, var(--ai-max));
  margin: 0 auto;
  display: grid;
  gap: 1.15rem;
}
.ai-footer-brand {
  font-size: 1.2rem;
  color: #fff;
  font-weight: 750;
}
.ai-footer-meta {
  display: grid;
  gap: 0.4rem;
  font-size: 13px;
}
.ai-footer-meta span { color: rgba(242, 245, 255, 0.45); }
.ai-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.ai-footer-links a {
  color: #b8c4ff;
  text-decoration: none;
  font-size: 13px;
}
.ai-footer-copy {
  margin: 0;
  font-size: 12px;
  color: rgba(242, 245, 255, 0.4);
}

@keyframes aiRise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes aiBlink {
  0% { box-shadow: 0 0 0 0 rgba(74, 105, 255, 0.5); }
  70% { box-shadow: 0 0 0 12px rgba(74, 105, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 105, 255, 0); }
}
@keyframes aiOrb {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.85; }
  50% { transform: translateY(-14px) scale(1.06); opacity: 1; }
}

@media (max-width: 900px) {
  .ai-hero-meta {
    grid-template-columns: 1fr 1fr;
    width: 100%;
  }
  .ai-hero-meta dd { white-space: normal; }
  .ai-hero-meta div { border-right: 0; border-bottom: 1px solid var(--ai-line); }
  .ai-hero-meta div:nth-child(3),
  .ai-hero-meta div:nth-child(4) { border-bottom: 0; }
  .ai-meters { grid-template-columns: 1fr 1fr; }
  .ai-chain { grid-template-columns: 1fr 1fr; }
  .ai-aeci { grid-template-columns: 1fr; }
  .ai-id-rail { display: none; }
  .ai-subnav-links { display: none; }
  .ai-hero-inner { text-align: left; justify-items: start; }
  .ai-hero-actions { justify-content: flex-start; }
}
@media (max-width: 560px) {
  .ai-hero { min-height: auto; padding: 3rem 0 3.5rem; }
  .ai-meters { grid-template-columns: 1fr; }
  .ai-chain { grid-template-columns: 1fr; }
  .ai-findings li { grid-template-columns: 2rem 1fr; }
  .ai-findings li em { grid-column: 2; justify-self: start; }
}
@media (prefers-reduced-motion: reduce) {
  .ai-hero-bg::before,
  .ai-hero-bg::after,
  .ai-brand-mark i,
  .ai-brand-mark,
  .ai-hero h1,
  .ai-hero-lead,
  .ai-hero-actions,
  .ai-hero-meta { animation: none; }
  .ai-intro { display: none !important; }
  html.ai-intro-lock { overflow: auto !important; }
}

/* —— Opening intro：立即强冲击片头（不先露首屏） —— */
html.ai-intro-lock,
html.ai-intro-lock body,
html.ai-intro-pending,
html.ai-intro-pending body {
  overflow: hidden !important;
}
.ai-intro {
  position: fixed;
  inset: 0;
  z-index: 2147483001;
  display: grid;
  place-items: center;
  background: radial-gradient(120% 90% at 50% 40%, #1a1f4a 0%, #0b0f28 55%, #070a1a 100%);
  opacity: 1;
  transform: scale(1);
}
.ai-intro.is-out {
  opacity: 0;
  transform: scale(1.08);
  filter: blur(8px);
  pointer-events: none;
  transition: opacity 0.7s ease, transform 0.7s ease, filter 0.7s ease;
}
.ai-intro.is-impact {
  animation: aiIntroShake 0.38s ease;
}
.ai-intro.is-boom .ai-intro-flash {
  animation: aiIntroFlashBoom 0.5s ease;
}
.ai-intro-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.ai-intro-flash {
  position: absolute;
  inset: -10%;
  background: radial-gradient(circle at 50% 45%, rgba(255, 255, 255, 0.55), transparent 42%);
  opacity: 0;
}
.ai-intro.is-on .ai-intro-flash {
  animation: aiIntroFlashIn 0.55s ease forwards;
}
.ai-intro-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(36px);
  opacity: 0;
  mix-blend-mode: screen;
}
.ai-intro.is-on .ai-intro-orb { animation: aiIntroOrbBoom 4.8s ease forwards; }
.ai-intro-orb--a {
  width: 520px;
  height: 520px;
  left: -8%;
  top: 5%;
  background: rgba(74, 105, 255, 0.55);
}
.ai-intro-orb--b {
  width: 480px;
  height: 480px;
  right: -10%;
  top: 12%;
  background: rgba(155, 81, 255, 0.48);
  animation-delay: 0.08s !important;
}
.ai-intro-orb--c {
  width: 420px;
  height: 420px;
  left: 32%;
  bottom: -8%;
  background: rgba(99, 180, 255, 0.35);
  animation-delay: 0.16s !important;
}
.ai-intro-ring {
  position: absolute;
  left: 50%;
  top: 46%;
  width: 40px;
  height: 40px;
  margin: -20px 0 0 -20px;
  border: 2px solid rgba(155, 180, 255, 0.55);
  border-radius: 50%;
  opacity: 0;
}
.ai-intro.is-on .ai-intro-ring { animation: aiIntroRing 1.8s ease-out forwards; }
.ai-intro-ring--b {
  animation-delay: 0.22s !important;
  border-color: rgba(180, 120, 255, 0.5);
}
.ai-intro-ring--c {
  animation-delay: 0.48s !important;
  border-color: rgba(120, 200, 255, 0.45);
  border-width: 1px;
}
.ai-intro-beam {
  position: absolute;
  left: 50%;
  top: -20%;
  width: 2px;
  height: 140%;
  margin-left: -1px;
  background: linear-gradient(180deg, transparent, rgba(180, 200, 255, 0.85), transparent);
  opacity: 0;
  transform: scaleY(0.2);
}
.ai-intro.is-on .ai-intro-beam {
  animation: aiIntroBeam 1.1s 0.35s ease forwards;
}
.ai-intro-beam--tilt {
  transform: rotate(28deg) scaleY(0.2);
  transform-origin: 50% 50%;
  opacity: 0;
  background: linear-gradient(180deg, transparent, rgba(200, 140, 255, 0.7), transparent);
}
.ai-intro.is-on .ai-intro-beam--tilt {
  animation: aiIntroBeamTilt 1.15s 0.48s ease forwards;
}
.ai-intro-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 45%, transparent 30%, rgba(0, 0, 0, 0.45) 100%);
  opacity: 0;
}
.ai-intro.is-on .ai-intro-vignette {
  animation: aiIntroFade 0.5s 0.05s ease forwards;
}
.ai-intro-grid {
  position: absolute;
  inset: 0;
  opacity: 0;
  background-image:
    linear-gradient(rgba(140, 170, 255, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(140, 170, 255, 0.1) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 45%, #000 18%, transparent 70%);
}
.ai-intro.is-on .ai-intro-grid {
  animation: aiIntroFade 0.6s 0.1s ease forwards;
}
.ai-intro-sparks {
  position: absolute;
  inset: 0;
}
.ai-intro-spark {
  position: absolute;
  left: 50%;
  top: 48%;
  width: 4px;
  height: 4px;
  margin: -2px;
  border-radius: 50%;
  background: #fff;
  opacity: 0;
  box-shadow: 0 0 10px rgba(160, 180, 255, 0.9);
}
.ai-intro.is-on .ai-intro-spark {
  animation: aiIntroSpark 1.35s ease-out forwards;
  animation-delay: calc(0.55s + var(--i) * 0.028s);
}
.ai-intro-stage {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 1.5rem;
  max-width: 980px;
  width: min(960px, 94vw);
}
.ai-intro-duel {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(0.6rem, 2vw, 1.4rem);
  min-height: clamp(3.2rem, 10vw, 5.2rem);
  margin-bottom: 0.35rem;
  perspective: 800px;
}
.ai-intro-duel-word {
  font-family: "Syne", "Noto Sans SC", sans-serif;
  font-weight: 800;
  font-size: clamp(2.6rem, 11vw, 5.2rem);
  line-height: 1;
  letter-spacing: -0.04em;
  opacity: 0;
  will-change: transform, opacity, filter;
}
.ai-intro-duel-word--l {
  color: #7aa2ff;
  text-shadow: 0 0 28px rgba(74, 105, 255, 0.65), 3px 0 0 rgba(255, 80, 180, 0.35);
}
.ai-intro-duel-word--r {
  color: #d6a8ff;
  text-shadow: 0 0 28px rgba(155, 81, 255, 0.65), -3px 0 0 rgba(80, 220, 255, 0.35);
}
.ai-intro-duel-vs {
  font-family: "Syne", sans-serif;
  font-size: clamp(1.4rem, 4vw, 2rem);
  color: rgba(255, 255, 255, 0.55);
  opacity: 0;
  transform: scale(0.4) rotate(-20deg);
}
.ai-intro.is-on .ai-intro-duel-word--l {
  animation: aiIntroDuelL 1.05s cubic-bezier(0.12, 0.9, 0.2, 1) forwards;
}
.ai-intro.is-on .ai-intro-duel-word--r {
  animation: aiIntroDuelR 1.05s cubic-bezier(0.12, 0.9, 0.2, 1) forwards;
}
.ai-intro.is-on .ai-intro-duel-vs {
  animation: aiIntroDuelVs 0.55s 0.55s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.ai-intro.is-clash .ai-intro-duel {
  animation: aiIntroDuelHit 0.45s ease;
}
.ai-intro.is-dance .ai-intro-duel {
  opacity: 0;
  transform: scale(1.35);
  filter: blur(10px);
  transition: opacity 0.45s ease, transform 0.45s ease, filter 0.45s ease;
  pointer-events: none;
}
.ai-intro-line {
  margin: 0;
  opacity: 0;
}
.ai-intro.is-on .ai-intro-line--brand {
  animation: aiIntroPop 0.5s 0.85s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.ai-intro.is-on .ai-intro-line--id {
  animation: aiIntroPop 0.5s 1.05s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.ai-intro.is-on .ai-intro-line--title,
.ai-intro.is-on .ai-intro-line--sub {
  opacity: 1;
}
.ai-intro-line--brand {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 12px;
  letter-spacing: 0.28em;
  color: #9eb0ff;
  font-weight: 600;
  text-shadow: 0 0 24px rgba(120, 150, 255, 0.45);
}
.ai-intro-line--id {
  margin-top: 0.55rem;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: clamp(1.05rem, 3vw, 1.45rem);
  letter-spacing: 0.22em;
  color: #c4b0ff;
  font-weight: 700;
  text-shadow: 0 0 28px rgba(155, 81, 255, 0.55);
}
.ai-intro-line--title {
  margin-top: 1rem;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-weight: 900;
  font-size: clamp(1.85rem, 6.2vw, 3.6rem);
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: #fff;
}
.ai-intro-title-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.02em;
  margin: 0.08em 0;
}
.ai-intro-ch {
  display: inline-block;
  opacity: 0;
  transform: translate(var(--sx), var(--sy)) rotate(var(--rot)) scale(1.8);
  background: linear-gradient(105deg, #ffffff 8%, #a9b8ff 48%, #d6b4ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 8px 18px rgba(74, 105, 255, 0.28));
  will-change: transform, opacity, filter;
}
.ai-intro-ch--sp {
  width: 0.35em;
  opacity: 0;
  background: none;
  color: transparent;
  transform: none;
}
.ai-intro.is-dance .ai-intro-ch:not(.ai-intro-ch--sp) {
  animation:
    aiIntroFightIn 0.7s var(--d) cubic-bezier(0.14, 1.2, 0.28, 1) forwards,
    aiIntroDance var(--dance) calc(var(--d) + 0.7s) ease-in-out 3 alternate;
}
.ai-intro.is-lock .ai-intro-ch:not(.ai-intro-ch--sp) {
  animation: none;
  opacity: 1;
  transform: translate(0, 0) rotate(0deg) scale(1);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), filter 0.35s ease;
}
.ai-intro.is-dance .ai-intro-ch--sp {
  animation: aiIntroFade 0.01s var(--d, 1.5s) forwards;
}
.ai-intro.is-lock .ai-intro-ch--sp {
  opacity: 1;
}
.ai-intro-line--sub {
  margin-top: 1.05rem;
  font-size: 14px;
  letter-spacing: 0.12em;
  font-weight: 600;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.02em;
}
.ai-intro-line--sub .ai-intro-ch {
  font-size: inherit;
  letter-spacing: inherit;
  background: none;
  -webkit-background-clip: unset;
  background-clip: unset;
  color: rgba(220, 228, 255, 0.82);
  filter: none;
  transform: translate(var(--sx), var(--sy)) rotate(calc(var(--rot) * 0.5)) scale(1.35);
}
.ai-intro.is-dance .ai-intro-line--sub .ai-intro-ch:not(.ai-intro-ch--sp) {
  animation:
    aiIntroFightInSoft 0.55s var(--d) cubic-bezier(0.16, 1, 0.3, 1) forwards,
    aiIntroDanceSoft var(--dance) calc(var(--d) + 0.5s) ease-in-out 2 alternate;
}
.ai-intro.is-lock .ai-intro-line--sub .ai-intro-ch:not(.ai-intro-ch--sp) {
  color: rgba(220, 228, 255, 0.82);
}
.ai-intro-bar {
  width: 0;
  height: 4px;
  margin: 1.35rem auto 0;
  border-radius: 999px;
  background: linear-gradient(90deg, #4a69ff, #9b51ff, #63b4ff);
  box-shadow: 0 0 24px rgba(120, 150, 255, 0.7);
  opacity: 0;
}
.ai-intro.is-dance .ai-intro-bar {
  animation: aiIntroBarBoom 0.7s 1.9s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.ai-intro-skip {
  position: absolute;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 2;
  border: 1px solid rgba(180, 200, 255, 0.35);
  background: rgba(255, 255, 255, 0.1);
  color: rgba(240, 244, 255, 0.9);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  font-size: 13px;
  cursor: pointer;
  backdrop-filter: blur(8px);
}
.ai-intro-skip:hover {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
}

@keyframes aiIntroPop {
  from { opacity: 0; transform: translateY(22px) scale(0.92); filter: blur(6px); }
  to { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}
@keyframes aiIntroDuelL {
  0% { opacity: 0; transform: translateX(-58vw) rotate(-18deg) scale(1.4); filter: blur(8px); }
  62% { opacity: 1; transform: translateX(14px) rotate(4deg) scale(1.08); filter: blur(0); }
  82% { transform: translateX(-8px) rotate(-2deg) scale(0.98); }
  100% { opacity: 1; transform: translateX(0) rotate(0) scale(1); }
}
@keyframes aiIntroDuelR {
  0% { opacity: 0; transform: translateX(58vw) rotate(18deg) scale(1.4); filter: blur(8px); }
  62% { opacity: 1; transform: translateX(-14px) rotate(-4deg) scale(1.08); filter: blur(0); }
  82% { transform: translateX(8px) rotate(2deg) scale(0.98); }
  100% { opacity: 1; transform: translateX(0) rotate(0) scale(1); }
}
@keyframes aiIntroDuelVs {
  0% { opacity: 0; transform: scale(0.2) rotate(-40deg); }
  70% { opacity: 1; transform: scale(1.25) rotate(8deg); }
  100% { opacity: 1; transform: scale(1) rotate(0); }
}
@keyframes aiIntroDuelHit {
  0%, 100% { transform: translate(0, 0) scale(1); }
  30% { transform: translate(-10px, 4px) scale(1.06); }
  55% { transform: translate(12px, -5px) scale(0.96); }
  75% { transform: translate(-6px, 2px) scale(1.03); }
}
@keyframes aiIntroFightIn {
  0% {
    opacity: 0;
    transform: translate(var(--sx), var(--sy)) rotate(var(--rot)) scale(1.85);
    filter: blur(8px) drop-shadow(0 8px 18px rgba(74, 105, 255, 0.2));
  }
  58% {
    opacity: 1;
    transform: translate(calc(var(--sx) * -0.08), calc(var(--sy) * -0.08)) rotate(calc(var(--rot) * -0.35)) scale(1.12);
    filter: blur(0) drop-shadow(0 8px 18px rgba(74, 105, 255, 0.35));
  }
  78% {
    transform: translate(calc(var(--sx) * 0.03), calc(var(--sy) * 0.03)) rotate(calc(var(--rot) * 0.12)) scale(0.94);
  }
  100% {
    opacity: 1;
    transform: translate(0, 0) rotate(0deg) scale(1);
    filter: blur(0) drop-shadow(0 8px 18px rgba(74, 105, 255, 0.28));
  }
}
@keyframes aiIntroFightInSoft {
  0% {
    opacity: 0;
    transform: translate(var(--sx), var(--sy)) rotate(calc(var(--rot) * 0.5)) scale(1.35);
  }
  100% {
    opacity: 1;
    transform: translate(0, 0) rotate(0deg) scale(1);
  }
}
@keyframes aiIntroDance {
  0% { transform: translate(0, 0) rotate(0deg) scale(1); }
  25% { transform: translate(-3px, -7px) rotate(-6deg) scale(1.08); }
  50% { transform: translate(4px, 3px) rotate(5deg) scale(0.96); }
  75% { transform: translate(-2px, 5px) rotate(-3deg) scale(1.05); }
  100% { transform: translate(2px, -2px) rotate(4deg) scale(1); }
}
@keyframes aiIntroDanceSoft {
  0% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(0, -4px) rotate(-3deg); }
  100% { transform: translate(0, 2px) rotate(2deg); }
}
@keyframes aiIntroFade {
  to { opacity: 1; }
}
@keyframes aiIntroOrbBoom {
  0% { opacity: 0; transform: scale(0.5); }
  25% { opacity: 1; transform: scale(1.15); }
  100% { opacity: 0.85; transform: scale(1); }
}
@keyframes aiIntroBarBoom {
  0% { width: 0; opacity: 0; }
  100% { width: min(240px, 52vw); opacity: 1; }
}
@keyframes aiIntroRing {
  0% { opacity: 0.9; transform: scale(0.2); }
  100% { opacity: 0; transform: scale(18); }
}
@keyframes aiIntroBeam {
  0% { opacity: 0; transform: scaleY(0.15); }
  35% { opacity: 1; transform: scaleY(1); }
  100% { opacity: 0.35; transform: scaleY(1); }
}
@keyframes aiIntroBeamTilt {
  0% { opacity: 0; transform: rotate(28deg) scaleY(0.15); }
  40% { opacity: 0.85; transform: rotate(28deg) scaleY(1); }
  100% { opacity: 0.25; transform: rotate(28deg) scaleY(1); }
}
@keyframes aiIntroFlashIn {
  0% { opacity: 0.9; }
  100% { opacity: 0; }
}
@keyframes aiIntroFlashBoom {
  0% { opacity: 0; }
  20% { opacity: 0.75; }
  100% { opacity: 0; }
}
@keyframes aiIntroShake {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-6px, 3px); }
  40% { transform: translate(7px, -4px); }
  60% { transform: translate(-4px, -2px); }
  80% { transform: translate(3px, 3px); }
}
@keyframes aiIntroSpark {
  0% { opacity: 0; transform: translate(0, 0) scale(0.4); }
  18% { opacity: 1; transform: translate(calc(var(--dx) * 0.15), calc(var(--dy) * 0.15)) scale(1.15); }
  100% {
    opacity: 0;
    transform: translate(var(--dx), var(--dy)) scale(0.15);
  }
}

@media (max-width: 560px) {
  .ai-intro-line--title { letter-spacing: 0; font-size: clamp(1.55rem, 8.5vw, 2.2rem); }
  .ai-intro-line--sub { letter-spacing: 0.04em; font-size: 12px; }
  .ai-intro-duel-word { font-size: clamp(2.1rem, 14vw, 3.2rem); }
}