:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --soft: #f0f2f5;
  --line: #e3e6ea;
  --line-strong: #ccd2da;
  --ink: #1c2430;
  --muted: #667085;
  --mute: #98a1ad;
  --red: #c8102e;            /* 中信红 */
  --red-dark: #a30d26;
  --red-soft: rgba(200, 16, 46, 0.08);
  --navy: #0f2b5b;
  --navy-soft: #eef2f9;
  --gold: #b8860b;
  --ok: #1a7f4b;
  --danger: #c8102e;
  --shadow: 0 10px 28px rgba(16, 33, 66, 0.08);
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sans: "PingFang SC", "Microsoft YaHei", -apple-system, "Segoe UI", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body { font-family: var(--sans); color: var(--ink); background: var(--bg); line-height: 1.6; font-size: 14px; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--navy); text-decoration: none; }
a:hover { color: var(--red); }
.mono { font-family: var(--mono); }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.hidden { display: none !important; }
mark { background: #fff2b8; color: #6b5300; border-radius: 2px; padding: 1px 2px; }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 7px; border: 1px solid var(--line-strong); border-radius: 6px;
  padding: 9px 16px; background: #fff; font-weight: 600; font-size: 13.5px; transition: .15s; }
.btn:hover { border-color: var(--red); color: var(--red); }
.btn.primary { background: var(--red); border-color: var(--red); color: #fff; }
.btn.primary:hover { background: var(--red-dark); color: #fff; }
.btn.navy { background: var(--navy); border-color: var(--navy); color: #fff; }
.btn.sm { padding: 6px 12px; font-size: 12.5px; }
.pill { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--red-soft); border-radius: 4px;
  padding: 4px 10px; font-size: 12px; color: var(--red); background: var(--red-soft); font-weight: 600; }

/* ---- 首页(银行官网风) ---- */
.topstrip { background: var(--navy); color: #cdd8ea; font-size: 12.5px; }
.topstrip .wrap { display: flex; justify-content: space-between; align-items: center; height: 34px; }
.topstrip a { color: #cdd8ea; }
.nav { background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20; }
.nav .wrap { display: flex; align-items: center; gap: 26px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); font-weight: 800; font-size: 16px; }
.brand .mark { width: 30px; height: 30px; border-radius: 5px; background: var(--red); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 15px; letter-spacing: -1px; }
.brand small { display: block; color: var(--mute); font-size: 10.5px; font-weight: 500; letter-spacing: .02em; }
.nav .links { display: flex; gap: 24px; margin-left: 10px; }
.nav .links a { color: #33415c; font-size: 14px; font-weight: 600; padding: 6px 0; border-bottom: 2px solid transparent; }
.nav .links a:hover { color: var(--red); border-color: var(--red); }
.nav .acts { margin-left: auto; display: flex; gap: 10px; }

.hero { background: linear-gradient(120deg, #0f2b5b 0%, #1b3f7a 55%, #c8102e 160%); color: #fff; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: 50px; align-items: center; padding: 60px 6vw 64px; }
.hero h1 { margin: 16px 0 14px; font-size: clamp(28px, 3.6vw, 42px); line-height: 1.2; font-weight: 800; letter-spacing: .01em; }
.hero p { color: #d6e0f2; font-size: 15.5px; max-width: 44ch; margin: 0; }
.hero .tagline { display: inline-flex; gap: 8px; align-items: center; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.25);
  color: #fff; border-radius: 4px; padding: 5px 12px; font-size: 12.5px; }
.hero .cta { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero .cta .btn { border-color: transparent; }
.hero .trust { margin-top: 26px; display: flex; gap: 22px; flex-wrap: wrap; color: #b9c8e4; font-size: 12.5px; }
.hero .trust span::before { content: "✓ "; color: #7fe0a6; font-weight: 800; }
.hero-card { background: #fff; border-radius: 12px; padding: 20px; box-shadow: 0 18px 50px rgba(0,0,0,.25); color: var(--ink); }
.hero-card .hd { display: flex; align-items: center; justify-content: space-between; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.hero-card .hd strong { font-size: 14px; }
.hero-card .q { justify-self: end; background: var(--navy-soft); color: var(--navy); padding: 9px 13px; border-radius: 8px 8px 2px 8px; font-size: 13.5px; max-width: 84%; margin-top: 12px; }
.hero-card .a { background: #f7f8fa; border: 1px solid var(--line); border-radius: 8px 8px 8px 2px; padding: 12px 14px; font-size: 13.5px; margin-top: 10px; }
.hero-card .a .src { color: var(--red); font-weight: 800; }
.hero-card .ref { margin-top: 10px; font-size: 11.5px; color: var(--muted); border-left: 3px solid var(--red); padding-left: 9px; }

.section { padding: 52px 6vw; }
.section.alt { background: #fff; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-bottom: 24px; }
.section-head h2 { margin: 0; font-size: 24px; letter-spacing: .01em; }
.section-head h2::after { content: ""; display: block; width: 40px; height: 3px; background: var(--red); margin-top: 10px; }
.section-head p { margin: 0; color: var(--muted); font-size: 14px; max-width: 54ch; }
.svc { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.svc .c { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 22px; transition: .15s; }
.svc .c:hover { border-color: var(--red); box-shadow: var(--shadow); }
.svc .c .ico { width: 40px; height: 40px; border-radius: 8px; background: var(--red-soft); color: var(--red); display: grid; place-items: center; font-size: 18px; font-weight: 800; }
.svc .c h3 { margin: 14px 0 8px; font-size: 16px; }
.svc .c p { margin: 0; color: var(--muted); font-size: 13.5px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stats .s { text-align: center; padding: 20px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.stats .s .n { font-size: 26px; font-weight: 800; color: var(--navy); font-family: var(--mono); }
.stats .s .l { color: var(--muted); font-size: 13px; margin-top: 4px; }
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #fff; }
.flow .st { padding: 22px; border-right: 1px solid var(--line); }
.flow .st:last-child { border-right: 0; }
.flow .st .k { font-family: var(--mono); font-size: 12px; color: var(--red); font-weight: 700; }
.flow .st h3 { margin: 10px 0 6px; font-size: 15.5px; }
.flow .st p { margin: 0; color: var(--muted); font-size: 13px; }
.footer { background: #10203c; color: #93a2bd; padding: 30px 6vw; font-size: 12.5px; }
.footer .row { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer .disc { margin-top: 14px; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.1); color: #6f7f9d; line-height: 1.7; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 6vw; }
.wrap-tight { max-width: 900px; margin: 0 auto; padding: 0 24px; }

/* ---- 登录 ---- */
.auth-page { min-height: 100dvh; display: grid; place-items: center; padding: 60px 20px;
  background: linear-gradient(120deg, #0f2b5b 0%, #1b3f7a 60%, #c8102e 170%); }
.auth-panel { width: min(440px, 94vw); background: #fff; border-radius: 12px; box-shadow: 0 24px 60px rgba(0,0,0,.3); padding: 32px 34px; display: grid; gap: 18px; }
.auth-panel h1 { margin: 0; font-size: 22px; }
.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; background: var(--soft); border: 1px solid var(--line); border-radius: 6px; padding: 4px; }
.tabs .tab { border: 0; background: transparent; border-radius: 4px; padding: 8px; font-weight: 700; color: var(--muted); }
.tabs .tab.active { background: #fff; color: var(--red); box-shadow: 0 1px 3px rgba(0,0,0,.08); }
.field { display: grid; gap: 5px; }
.field span { font-size: 12.5px; color: var(--muted); }
.field input { border: 1px solid var(--line-strong); border-radius: 6px; padding: 11px 12px; outline: none; background: #fff; }
.field input:focus { border-color: var(--red); box-shadow: 0 0 0 3px var(--red-soft); }
.form-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.msg { margin: 0; color: var(--danger); font-size: 12.5px; min-height: 16px; }
.msg.ok { color: var(--ok); }

/* ---- 工作台 ---- */
.app { display: grid; grid-template-columns: 216px 1fr; height: 100vh; overflow: hidden; }
.sidebar { background: var(--navy); color: #cdd8ea; padding: 14px 10px; display: flex; flex-direction: column; gap: 14px; }
.sidebar .brand { color: #fff; }
.sidebar .brand small { color: #8fa3c4; }
.sidebar .mark { background: #fff; color: var(--red); }
.nav-btn { border: 0; background: transparent; text-align: left; padding: 9px 11px; border-radius: 6px; color: #b6c4dd; font-size: 13.5px; }
.nav-btn:hover { background: rgba(255,255,255,.08); color: #fff; }
.nav-btn.active { background: var(--red); color: #fff; font-weight: 700; }
.side-foot { margin-top: auto; color: #7f92b4; font-size: 10.5px; font-family: var(--mono); }
.main { min-width: 0; display: flex; flex-direction: column; height: 100%; overflow: hidden; }
.topbar { flex: none; height: 56px; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--line); background: #fff; }
.crumb { color: var(--mute); font-size: 10.5px; font-family: var(--mono); }
.topbar h1 { margin: 0; font-size: 15.5px; }
.top-actions { display: flex; gap: 10px; align-items: center; margin-left: auto; }
.user-capsule { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 999px; padding: 3px 8px 3px 3px; background: #fff; }
.user-avatar { width: 26px; height: 26px; border-radius: 50%; background: var(--navy); color: #fff; display: grid; place-items: center; font-size: 11px; font-weight: 800; }
.logout-chip { border: 0; background: transparent; color: var(--muted); font-size: 11.5px; font-weight: 700; padding: 4px 8px; border-radius: 999px; }
.view { display: none; padding: 16px 20px 20px; flex: 1; min-height: 0; overflow: auto; }
.view.active { display: flex; flex-direction: column; }
#view-kb.active { padding: 0; overflow: hidden; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 18px; width: 100%; }
.card.stretch { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.card-head { display: flex; justify-content: space-between; align-items: start; gap: 16px; margin-bottom: 14px; }
.card h2 { margin: 0 0 4px; font-size: 18px; }
.kb-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.kb-card { border: 1px solid var(--line); border-radius: 8px; padding: 15px; background: #fff; display: grid; gap: 5px; cursor: pointer; transition: .15s; }
.kb-card:hover { border-color: var(--red); box-shadow: var(--shadow); }
.kb-card h3 { margin: 0; font-size: 14.5px; }
.kb-card p { margin: 0; color: var(--muted); font-size: 12.5px; min-height: 34px; }
.kb-meta { color: var(--red); font-size: 11.5px; font-weight: 700; font-family: var(--mono); }
.kb-actions { display: flex; justify-content: space-between; margin-top: 4px; }
.linkish { border: 0; background: transparent; color: var(--navy); font-weight: 700; padding: 0; font-size: 12.5px; }
.linkish.danger { color: var(--red); }
.empty { padding: 20px; text-align: center; color: var(--muted); border: 1px dashed var(--line-strong); border-radius: 8px; font-size: 12.5px; }

.kb-ws { display: grid; grid-template-columns: 280px 1fr; flex: 1; min-height: 0; height: 100%; overflow: hidden; }
.rail { border-right: 1px solid var(--line); background: #fbfcfd; display: flex; flex-direction: column; min-height: 0; }
.rail-head { display: flex; align-items: center; justify-content: space-between; padding: 12px; border-bottom: 1px solid var(--line); }
.rail-head h2 { margin: 0; font-size: 13.5px; }
.dropzone { margin: 12px; border: 1.5px dashed var(--line-strong); border-radius: 8px; background: #fff; padding: 12px; display: flex; gap: 10px; align-items: center; color: var(--muted); cursor: pointer; }
.dropzone:hover, .dropzone.drag { border-color: var(--red); background: var(--red-soft); color: var(--red); }
.drop-ico { width: 30px; height: 30px; border-radius: 6px; background: var(--red-soft); color: var(--red); display: grid; place-items: center; font-size: 17px; font-weight: 700; }
.dropzone strong { display: block; font-size: 12.5px; color: var(--ink); }
.dropzone span { font-size: 11px; }
.file-head { display: flex; justify-content: space-between; padding: 4px 14px; font-size: 11px; font-weight: 700; color: var(--muted); font-family: var(--mono); }
.doc-list { flex: 1; overflow: auto; padding: 0 8px 12px; display: flex; flex-direction: column; gap: 3px; }
.doc-row { display: grid; grid-template-columns: 30px 1fr auto; gap: 8px; align-items: center; padding: 8px; border-radius: 6px; border: 1px solid transparent; }
.doc-row:hover { background: #fff; border-color: var(--line); }
.doc-ico { width: 30px; height: 30px; border-radius: 5px; background: #fff; border: 1px solid var(--line); display: grid; place-items: center; font-size: 9px; font-weight: 800; color: var(--navy); font-family: var(--mono); }
.doc-name { font-size: 12.5px; font-weight: 650; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.doc-meta { font-size: 11px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.badge { padding: 2px 7px; border-radius: 4px; font-size: 10px; font-weight: 700; background: var(--navy-soft); color: var(--navy); font-family: var(--mono); }
.badge.failed { background: var(--red-soft); color: var(--red); }
.badge.multi { background: rgba(184,134,11,.12); color: var(--gold); }
.icon-btn { width: 24px; height: 24px; border: 0; background: transparent; color: var(--muted); border-radius: 5px; }
.icon-btn:hover { background: var(--red-soft); color: var(--red); }

.chat-shell { display: flex; min-width: 0; min-height: 0; height: 100%; background: var(--bg); padding: 12px; overflow: hidden; }
.chat-panel { flex: 1; display: flex; flex-direction: column; min-height: 0; background: #fff; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.chat-head { flex: none; padding: 11px 16px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; background: #fff; }
.chat-title { font-size: 13.5px; font-weight: 800; }
.chat-sub { font-size: 11px; color: var(--muted); font-family: var(--mono); }
.cap-bar { flex: none; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; padding: 7px 14px; border-bottom: 1px solid var(--line); background: #fbfcfd; }
.cap-label { font-family: var(--mono); font-size: 10.5px; color: var(--red); font-weight: 700; }
.cap-chip { border: 1px solid var(--line-strong); background: #fff; color: var(--navy); border-radius: 4px; padding: 2px 9px; font-size: 11px; font-weight: 650; }
.link-bar { flex: none; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; padding: 8px 14px; border-bottom: 1px solid var(--line); background: #fbfcfd; }
.link-chip { border: 1px solid var(--line-strong); background: #fff; color: var(--muted); border-radius: 4px; padding: 4px 11px; font-size: 12px; font-weight: 650; }
.link-chip.on { background: var(--red); border-color: var(--red); color: #fff; }
.messages { flex: 1; min-height: 0; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 16px; background: #f7f8fa; }
.msg { display: grid; grid-template-columns: 38px 1fr; gap: 10px; align-items: start; }
.msg.user { grid-template-columns: 1fr 38px; }
.msg.user .msg-side { order: 2; }
.msg.user .msg-body { order: 1; justify-items: end; }
.msg-avatar { width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; font-size: 11px; font-weight: 800; background: var(--navy-soft); color: var(--navy); }
.msg.user .msg-avatar { background: var(--navy); color: #fff; }
.msg-body { display: grid; gap: 7px; min-width: 0; }
.bubble { max-width: min(720px, 100%); padding: 11px 14px; border-radius: 8px; font-size: 13.5px; white-space: pre-wrap; word-break: break-word; background: #fff; border: 1px solid var(--line); }
.msg.user .bubble { background: var(--navy); color: #fff; border: 0; }
.bubble.error { background: var(--red-soft); color: var(--red); border-color: rgba(200,16,46,.25); }
.bubble.md { white-space: normal; }
.bubble.md p { margin: .45em 0; } .bubble.md h1,.bubble.md h2,.bubble.md h3 { margin: .6em 0 .3em; }
.bubble.md ul,.bubble.md ol { margin: .4em 0; padding-left: 1.3em; }
.bubble.md code { font-family: var(--mono); background: var(--soft); padding: .1em .35em; border-radius: 4px; font-size: .92em; }
.bubble.md pre { background: #f4f5f7; padding: 10px; border-radius: 6px; overflow: auto; }
.bubble.md table { border-collapse: collapse; width: 100%; font-size: 12.5px; }
.bubble.md th,.bubble.md td { border: 1px solid var(--line); padding: 6px 8px; }
.cite-sup a { color: var(--red); font-weight: 800; cursor: pointer; }
.msg-actions { display: flex; gap: 6px; }
.msg-action { border: 1px solid var(--line); background: #fff; color: var(--muted); border-radius: 5px; padding: 4px 9px; font-size: 11px; font-weight: 700; }
.msg-action:hover { border-color: var(--red); color: var(--red); }
.refs { color: var(--muted); font-size: 11.5px; }
.refs .label { font-family: var(--mono); margin-bottom: 4px; }
.refs .item { display: grid; grid-template-columns: 24px 1fr; gap: 4px; margin: 5px 0; }
.refs .num { color: var(--red); font-weight: 800; font-family: var(--mono); }
.refs .file { color: #33415c; font-weight: 650; }
.ref-thumb { display: block; max-width: 190px; max-height: 120px; border-radius: 6px; border: 1px solid var(--line); margin: 6px 0; cursor: zoom-in; }
.source-img { display: block; max-width: 100%; max-height: 40vh; border-radius: 8px; border: 1px solid var(--line); margin-bottom: 12px; }
.workflow-card { border: 1px solid var(--line); border-left: 3px solid var(--red); background: #fff; border-radius: 8px; padding: 9px 12px; max-width: min(720px,100%); }
.wf-title { display: flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 800; color: var(--red); font-family: var(--mono); margin-bottom: 6px; }
.wf-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--red); animation: pulse 1.4s infinite; }
.wf-step { display: grid; grid-template-columns: 20px 88px 1fr; gap: 6px; font-size: 12px; padding: 2px 0; }
.wf-idx { width: 16px; height: 16px; border-radius: 3px; background: var(--navy-soft); color: var(--navy); font-size: 10px; font-weight: 800; display: grid; place-items: center; font-family: var(--mono); }
.wf-label { font-weight: 700; }
.wf-detail { color: var(--muted); }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.35} }
.trace-card { border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 9px 12px; font-size: 12px; color: var(--muted); max-width: min(720px,100%); }
.trace-card summary { cursor: pointer; color: var(--navy); font-weight: 700; font-family: var(--mono); }
.trace-row { display: grid; grid-template-columns: minmax(90px,1.1fr) 2fr auto; gap: 8px; align-items: center; margin-top: 6px; }
.trace-name { font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.trace-bar { height: 8px; background: var(--soft); border-radius: 999px; overflow: hidden; }
.trace-bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--navy), var(--red)); }
.trace-row.dropped .trace-bar i { background: #c8cdd6; }
.trace-num { font-family: var(--mono); font-size: 11px; white-space: nowrap; }
.composer { flex: none; border-top: 1px solid var(--line); padding: 10px 14px 14px; background: #fff; }
.composer-hint { margin: 0 0 8px; color: var(--muted); font-size: 12px; }
.composer-box { border: 1px solid var(--line-strong); border-radius: 8px; padding: 8px; display: grid; gap: 4px; }
.composer-box:focus-within { border-color: var(--red); box-shadow: 0 0 0 3px var(--red-soft); }
.composer-box textarea { border: 0; outline: none; resize: none; min-height: 44px; padding: 6px 8px; background: transparent; font-size: 13.5px; }
.composer-tools { display: flex; align-items: center; gap: 8px; }
.spacer { flex: 1; }
.chip { border: 1px solid var(--line); background: #fff; color: var(--muted); border-radius: 5px; padding: 5px 11px; font-size: 12px; font-weight: 700; }
.chip.on { background: var(--red-soft); border-color: rgba(200,16,46,.4); color: var(--red); }
.send { border: 0; border-radius: 5px; padding: 7px 16px; font-weight: 700; font-size: 13px; background: #dfe3e9; color: #98a1ad; }
.send.active { background: var(--red); color: #fff; }

.form { display: grid; gap: 14px; max-width: 900px; }
fieldset { border: 1px solid var(--line); border-radius: 8px; padding: 14px; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 10px; background: #fbfcfd; }
legend { padding: 0 6px; font-weight: 700; font-size: 13px; color: var(--red); }
.form label { display: grid; gap: 4px; font-size: 12px; color: var(--muted); }
.form input { border: 1px solid var(--line-strong); border-radius: 6px; padding: 8px 9px; background: #fff; }
.test-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; }
.test-card { border: 1px solid var(--line); border-radius: 8px; padding: 11px 13px; background: #fbfcfd; display: grid; gap: 2px; }
.test-card.ok { border-color: rgba(26,127,75,.4); background: rgba(26,127,75,.06); }
.test-card.fail { border-color: rgba(200,16,46,.35); background: var(--red-soft); }
.metric { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.usage-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 12px; }
.usage-card { border: 1px solid var(--line); border-radius: 8px; padding: 16px; background: #fff; }
.usage-card .n { font-size: 24px; font-weight: 800; color: var(--red); font-family: var(--mono); }
.usage-card .l { color: var(--muted); font-size: 12.5px; margin-top: 4px; }

.modal { position: fixed; inset: 0; background: rgba(16,33,66,.45); display: flex; align-items: center; justify-content: center; padding: 20px; z-index: 50; }
.modal-card { width: min(460px,100%); background: #fff; border-radius: 10px; padding: 18px; border: 1px solid var(--line); box-shadow: var(--shadow); display: grid; gap: 12px; }
.modal-card.wide { width: min(780px,94vw); }
.modal-card h3 { margin: 0; font-size: 16px; }
.modal-card form { display: grid; gap: 10px; }
.source-body { max-height: 52vh; overflow: auto; white-space: pre-wrap; line-height: 1.7; font-size: 13.5px; background: #f7f8fa; border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; }
.param-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.toast { position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%); background: var(--navy); color: #fff; padding: 9px 16px; border-radius: 6px; font-size: 13px; z-index: 60; }
.toast.err { background: var(--red-dark); }

@media (max-width: 980px) {
  .app, .hero .wrap { grid-template-columns: 1fr; }
  .kb-ws { grid-template-columns: 1fr; }
  fieldset, .test-grid, .usage-grid, .svc, .stats, .flow { grid-template-columns: 1fr; }
  .nav .links, .topstrip { display: none; }
}

/* ---- 智能客服(登录即问)---- */
.chat-app { height: 100vh; display: flex; flex-direction: column; background: var(--bg); }
.bank-header { flex: none; background: #fff; border-bottom: 1px solid var(--line); }
.bank-header .wrap { max-width: 1000px; margin: 0 auto; padding: 0 20px; height: 62px; display: flex; align-items: center; gap: 16px; }
.bh-right { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.chat-scroll { flex: 1; overflow-y: auto; }
.chat-box { max-width: 880px; margin: 0 auto; padding: 26px 20px 10px; }
.welcome { text-align: center; padding: 30px 10px 10px; }
.w-avatar { width: 52px; height: 52px; border-radius: 12px; background: var(--red); color: #fff; display: grid; place-items: center; font-weight: 800; margin: 0 auto 14px; font-size: 18px; }
.welcome h2 { margin: 0 0 8px; font-size: 21px; }
.welcome p { margin: 0 auto; max-width: 60ch; }
.sugg { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 20px; }
.sugg button { border: 1px solid var(--line-strong); background: #fff; color: #33415c; border-radius: 999px; padding: 8px 15px; font-size: 13px; }
.sugg button:hover { border-color: var(--red); color: var(--red); }
.composer-wrap { flex: none; border-top: 1px solid var(--line); background: #fff; }
.composer-wrap .inner { max-width: 880px; margin: 0 auto; padding: 12px 20px; display: flex; gap: 10px; align-items: flex-end; }
.composer-wrap textarea { flex: 1; border: 1px solid var(--line-strong); border-radius: 10px; padding: 11px 13px; resize: none; max-height: 140px; outline: none; font-size: 14px; }
.composer-wrap textarea:focus { border-color: var(--red); box-shadow: 0 0 0 3px var(--red-soft); }
.bank-footer { flex: none; background: #10203c; color: #7f8fab; font-size: 11.5px; padding: 12px 20px; text-align: center; line-height: 1.6; }
.msg-ai-tools { display: flex; gap: 8px; align-items: center; }

/* 图片问答 */
.img-btn { flex: none; border: 1px solid var(--line-strong); background: #fff; color: #33415c; border-radius: 10px; padding: 11px 14px; font-size: 13px; font-weight: 650; }
.img-btn:hover { border-color: var(--red); color: var(--red); }
.img-preview { display: flex; align-items: center; gap: 10px; padding: 8px 10px; margin-bottom: 8px; border: 1px solid var(--line); border-radius: 10px; background: #fbfcfd; }
.img-preview img { width: 54px; height: 54px; object-fit: cover; border-radius: 8px; border: 1px solid var(--line); }
.img-meta { display: flex; align-items: center; gap: 10px; }
.msg .bubble img.user-img { display: block; max-width: 220px; max-height: 160px; border-radius: 8px; margin-bottom: 6px; }

/* 参考来源折叠按钮 */
.refs-toggle { border: 1px solid var(--line-strong); background: #fff; color: var(--navy); border-radius: 999px; padding: 5px 14px; font-size: 12px; font-weight: 650; }
.refs-toggle:hover { border-color: var(--red); color: var(--red); }
.refs { margin-top: 8px; }

/* ---- 智能客服:配色加深,避免过白 ---- */
.chat-app { background: linear-gradient(180deg, #eaeff7 0%, #e2e8f2 60%, #dde4ef 100%); }
.bank-header { background: linear-gradient(180deg, #ffffff, #f6f8fc); border-top: 3px solid var(--red); box-shadow: 0 2px 10px rgba(16,33,66,.05); }
.chat-scroll { background: transparent; }
.welcome { background: linear-gradient(180deg, #ffffff, #f7f9fd); border: 1px solid var(--line); border-radius: 16px; box-shadow: 0 8px 26px rgba(16,33,66,.07); max-width: 720px; margin: 24px auto 8px; padding: 30px 26px; }
.w-avatar { box-shadow: 0 6px 16px rgba(200,16,46,.28); }
.messages { background: transparent; }
.msg.assistant .bubble { background: #fff; border: 1px solid var(--line); box-shadow: 0 2px 10px rgba(16,33,66,.06); border-left: 3px solid rgba(200,16,46,.4); }
.msg.user .bubble { background: linear-gradient(135deg, #16376b, #0f2b5b); box-shadow: 0 2px 10px rgba(15,43,91,.22); }
.workflow-card, .trace-card { box-shadow: 0 2px 10px rgba(16,33,66,.06); }
.composer-wrap { background: linear-gradient(180deg, #f6f8fc, #ffffff); box-shadow: 0 -2px 12px rgba(16,33,66,.05); }
.composer-wrap textarea { background: #fff; }
.sugg button { background: linear-gradient(180deg,#ffffff,#f5f7fb); box-shadow: 0 1px 4px rgba(16,33,66,.08); }
.sugg button:hover { box-shadow: 0 4px 12px rgba(200,16,46,.14); }
.bank-footer { background: linear-gradient(90deg, #0f2b5b, #14315f); }

/* ---- 智能客服:进一步加深配色 ---- */
.chat-app { background: linear-gradient(160deg, #d8e2f2 0%, #c8d5ea 45%, #bccbe4 100%); }
.chat-scroll { background-image: radial-gradient(rgba(15,43,91,.06) 1.2px, transparent 1.2px); background-size: 22px 22px; }
.bank-header { background: linear-gradient(180deg, #ffffff, #eaf0f9); }
.messages { background: transparent; }
.msg.assistant .bubble { background: #ffffff; border: 1px solid #d3dcec; border-left: 4px solid var(--red); box-shadow: 0 6px 18px rgba(16,33,66,.12); }
.welcome { background: linear-gradient(180deg, #ffffff, #f3f7fd); border: 1px solid #cfd9ea; }
.workflow-card, .trace-card { background: #f4f7fc; border-color: #d3dcec; }
.refs-toggle { background: #ffffff; box-shadow: 0 3px 10px rgba(16,33,66,.10); }
.composer-wrap { background: linear-gradient(180deg, #e8eef8, #ffffff); }
.composer-wrap textarea { border-color: #cfd9ea; }

/* ---- 品牌化 & 设计感 ---- */
.bank-header { background: linear-gradient(120deg, #0f2b5b 0%, #1b3f7a 68%, #b0102a 170%); border-top: 3px solid var(--red); box-shadow: 0 6px 20px rgba(15,43,91,.22); }
.bank-header .brand { color: #fff; }
.bank-header .brand small { color: #a9bce0; }
.bank-header .brand .mark { background: #fff; color: var(--red); }
.bank-header .bh-right .mono, .bank-header .bh-right .small { color: #cdd8ea !important; }
.bank-header .linkish { color: #dbe4f5; }
.bank-header .linkish:hover { color: #fff; }
.bank-header .user-capsule { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.28); }
.bank-header .user-avatar { background: var(--red); color: #fff; }
.bank-header .logout-chip { color: #cdd8ea; }
.bank-header .logout-chip:hover { color: #fff; }

.chat-app { position: relative; background: linear-gradient(180deg, #e8edf7 0%, #d6dff0 55%, #c7d3ea 100%); }
.chat-app::before { content: "CITIC"; position: absolute; right: -24px; bottom: 72px; font-size: 210px; font-weight: 900; letter-spacing: -10px; color: rgba(15,43,91,.045); pointer-events: none; z-index: 0; }
.chat-scroll { position: relative; z-index: 1; background-image: repeating-linear-gradient(135deg, rgba(15,43,91,.035) 0 2px, transparent 2px 18px); }
.chat-box { position: relative; z-index: 2; }
.bank-header { position: relative; z-index: 5; }

.welcome { border-top: 4px solid var(--red); }
.sugg button { border-color: #cfd9ea; }
.msg.assistant .msg-avatar { background: linear-gradient(135deg, #1b3f7a, #0f2b5b); color: #fff; }