.ch {
    display: inline-block;
    will-change: transform, opacity;
    transition:
      transform .9s cubic-bezier(.55,.05,.55,.95),
      opacity .9s ease-in;
  }
  .ch.fall {
    transform: translateY(220px) rotate(var(--r, 12deg));
    opacity: 0;
  }

  .p-char {
    max-width: var(--max);
    margin: 0 auto;
    padding: clamp(80px, 12vh, 140px) var(--pad-x);
    border-top: 1px solid var(--line);
  }

  .char-brain {
    position: relative;
    width: 100%;
    height: clamp(240px, 28vw, 360px);
    margin: 0 0 56px;
    overflow: hidden;
    border-radius: 18px;
    background:
      radial-gradient(80% 60% at 50% 50%, color-mix(in oklab, var(--accent) 9%, transparent) 0%, transparent 70%),
      linear-gradient(180deg, var(--bg-2), var(--bg-1));
    border: 1px solid var(--line);
  }
  .char-brain::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
    background-size: 28px 28px;
    pointer-events: none;
  }
  .char-brain-head {
    position: absolute;
    top: 18px;
    left: 22px;
    right: 22px;
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--fg-4);
    z-index: 3;
    pointer-events: none;
  }
  .char-brain-head .live {
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }
  .char-brain-head .live::before {
    content: "";
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
    animation: brain-pulse 2s ease-in-out infinite;
  }
  @keyframes brain-pulse {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.4); }
  }
  .char-brain svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
  }

  .brain-edge {
    stroke: rgba(255, 255, 255, 0.10);
    stroke-width: 0.8;
    fill: none;
    pointer-events: none;
  }
  .brain-edge.hot {
    stroke: color-mix(in oklab, var(--accent) 60%, rgba(255,255,255,0.10));
  }
  .brain-node {
    fill: rgba(255, 255, 255, 0.42);
    stroke: rgba(255, 255, 255, 0.22);
    stroke-width: 0.6;
    pointer-events: none;
  }
  .brain-node.concept {
    fill: var(--accent);
    stroke: var(--accent);
    filter: drop-shadow(0 0 8px var(--accent));
  }
  .brain-halo {
    fill: none;
    stroke: var(--accent);
    stroke-width: 1;
    opacity: 0.5;
    animation: halo-breathe 3.6s ease-in-out infinite;
    transform-origin: center;
    transform-box: fill-box;
    pointer-events: none;
  }
  @keyframes halo-breathe {
    0%, 100% { opacity: 0.20; transform: scale(1); }
    50%      { opacity: 0.55; transform: scale(1.35); }
  }
  .brain-label {
    fill: var(--fg);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    pointer-events: none;
  }
  .brain-spark {
    fill: var(--accent);
    filter: drop-shadow(0 0 8px var(--accent));
    pointer-events: none;
  }

  .p-char-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 60px;
    align-items: start;
  }
  @media (max-width: 980px) { .p-char-grid { grid-template-columns: 1fr; gap: 32px; } }
  .p-char h2 {
    font-family: var(--font-display);
    font-size: clamp(36px, 4.6vw, 60px);
    line-height: 1.02;
    letter-spacing: -0.025em;
    font-weight: 400;
    margin: 18px 0 28px;
    max-width: 22ch;
  }
  .p-char h2 em { font-style: normal; color: var(--accent); }
  .p-char-copy { display: grid; gap: 22px; max-width: 60ch; }
  .p-char-copy p {
    margin: 0;
    font-size: 17px;
    line-height: 1.65;
    color: var(--fg-2);
  }
  .p-char-copy p strong { color: var(--fg); font-weight: 500; }
  .p-char-copy p .k { color: var(--accent); }

  .char-card {
    position: relative;
    padding: 28px;
    background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg-1) 100%);
    border: 1px solid var(--line);
    border-radius: 18px;
    overflow: hidden;
  }
  .char-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, var(--accent), transparent);
  }
  .char-card-head {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 8px;
  }
  .char-card h3 {
    font-family: var(--font-display);
    font-size: 22px;
    line-height: 1.2;
    font-weight: 500;
    letter-spacing: -0.01em;
    margin: 0 0 22px;
  }
  .char-spec {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0;
  }
  .char-spec li {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 16px;
    padding: 14px 0;
    border-top: 1px solid var(--line);
    font-size: 14px;
    line-height: 1.45;
    color: var(--fg-2);
  }
  .char-spec li:first-child { border-top: 0; padding-top: 4px; }
  .char-spec li .tag {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.18em;
    color: var(--accent);
    text-transform: uppercase;
    align-self: start;
    padding-top: 2px;
    white-space: nowrap;
  }
  .char-spec li .v {
    color: var(--fg);
  }
  .char-spec li .big {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 400;
    letter-spacing: -0.015em;
    color: var(--accent);
    display: inline-block;
    margin-right: 6px;
    line-height: 1;
  }
  .char-tags {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }
  .char-tag {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid var(--line);
    color: var(--fg-3);
  }
  .char-tag.k {
    color: var(--accent);
    border-color: color-mix(in oklab, var(--accent) 40%, var(--line));
  }
  .chat {
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 22px;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.55;
    min-height: 380px;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  .chat-head {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 4px;
  }
  .chat-head .traf {
    display: flex;
    gap: 6px;
  }
  .chat-head .traf span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--bg-3);
  }
  .chat-head .title {
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--fg-4);
    text-transform: uppercase;
    margin-left: 12px;
  }
  .chat-head .status {
    margin-left: auto;
    font-size: 10px;
    letter-spacing: 0.18em;
    color: var(--accent);
  }
  .chat-head .status::before {
    content: "● ";
    color: var(--accent);
  }
  .msg-user {
    align-self: flex-end;
    max-width: 80%;
    padding: 12px 16px;
    background: color-mix(in oklab, var(--accent) 16%, transparent);
    border: 1px solid color-mix(in oklab, var(--accent) 40%, transparent);
    border-radius: 12px;
    color: var(--fg);
  }
  .msg-sys {
    align-self: flex-start;
    max-width: 92%;
    color: var(--fg-2);
  }
  .msg-sys .meta {
    color: var(--fg-4);
    font-size: 10px;
    letter-spacing: 0.16em;
    margin-bottom: 8px;
  }
  .msg-sys .sql {
    background: var(--bg-3);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--fg-2);
    font-size: 12px;
    margin: 6px 0 10px;
    border-left: 2px solid var(--accent);
  }
  .msg-sys .sql .k { color: var(--accent); }
  .msg-sys .answer { color: var(--fg); }
  .typing-dots {
    display: inline-flex;
    gap: 4px;
    margin-left: 8px;
  }
  .typing-dots span {
    width: 5px; height: 5px;
    border-radius: 50%;
    background: var(--accent);
    animation: blink 1.2s infinite;
  }
  .typing-dots span:nth-child(2) { animation-delay: 0.2s; }
  .typing-dots span:nth-child(3) { animation-delay: 0.4s; }
  @keyframes blink {
    0%, 60%, 100% { opacity: 0.3; }
    30% { opacity: 1; }
  }

  @media (max-width: 640px) {
    .char-spec li { grid-template-columns: 1fr; gap: 4px; }
    .char-spec li .tag { white-space: normal; }
    .char-brain { height: clamp(180px, 45vw, 260px); margin-bottom: 32px; }
    .char-brain-head { font-size: 9px; left: 14px; right: 14px; top: 12px; }
    .chat { min-height: 280px; padding: 16px; font-size: 12px; }
    .msg-user, .msg-sys { max-width: 100%; }
    .msg-sys .sql { font-size: 11px; overflow-x: auto; }
    .char-card { padding: 20px; }
  }