:root {
  color-scheme: light;
  --ink: #252c27;
  --ink-deep: #17231d;
  --ink-soft: #39463e;
  --muted: #6f746c;
  --muted-light: #94978e;
  --paper: #f3efe5;
  --paper-soft: #f8f5ed;
  --paper-light: #fffdf8;
  --paper-warm: #eee7d8;
  --line: #d9d0bd;
  --line-soft: #e8e1d4;
  --cinnabar: #a23b32;
  --cinnabar-dark: #7d2b27;
  --cinnabar-soft: #f2e2dc;
  --jade: #456b5a;
  --jade-dark: #2f5143;
  --jade-soft: #e3ebe5;
  --gold: #b28b46;
  --gold-deep: #8f6b31;
  --gold-soft: #efe3c6;
  --warning: #b06e2f;
  --danger: #a84843;
  --success: #47725d;
  --shadow-sm: 0 8px 24px rgba(44, 40, 31, .06);
  --shadow: 0 18px 48px rgba(44, 40, 31, .09);
  --shadow-hover: 0 24px 58px rgba(44, 40, 31, .13);
  --radius: 18px;
  --serif: "Songti SC", "STSong", "SimSun", serif;
  --kai: "Kaiti SC", "STKaiti", "KaiTi", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  --mouse-x: 72%;
  --mouse-y: 14%;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(86, 72, 45, .018) 1px, transparent 1px) 0 0 / 28px 28px,
    linear-gradient(rgba(86, 72, 45, .014) 1px, transparent 1px) 0 0 / 28px 28px,
    var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  pointer-events: none;
  background:
    radial-gradient(circle at var(--mouse-x) var(--mouse-y), rgba(178, 139, 70, .12), transparent 20rem),
    radial-gradient(circle at 7% 24%, rgba(69, 107, 90, .075), transparent 25rem),
    radial-gradient(circle at 94% 82%, rgba(162, 59, 50, .055), transparent 24rem);
  transition: background .15s linear;
}
body::after {
  position: fixed;
  inset: 0;
  z-index: 200;
  content: "";
  pointer-events: none;
  opacity: .14;
  mix-blend-mode: multiply;
  background-image:
    repeating-linear-gradient(93deg, transparent 0 12px, rgba(67, 58, 39, .022) 13px, transparent 14px 27px),
    repeating-linear-gradient(7deg, transparent 0 17px, rgba(255, 255, 255, .22) 18px, transparent 19px 31px);
}
::selection { color: #fff; background: rgba(162, 59, 50, .8); }
* { scrollbar-width: thin; scrollbar-color: #c5b89f transparent; }
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { border: 2px solid transparent; border-radius: 999px; background: #c5b89f; background-clip: padding-box; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .46; filter: saturate(.5); }
button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, a:focus-visible {
  outline: 3px solid rgba(178, 139, 70, .28);
  outline-offset: 3px;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 78px;
  color: #f8f1df;
  border-bottom: 1px solid rgba(202, 169, 102, .42);
  background:
    radial-gradient(circle at 10% -60%, rgba(178, 139, 70, .21), transparent 34%),
    radial-gradient(circle at 82% 160%, rgba(83, 126, 102, .18), transparent 38%),
    linear-gradient(112deg, rgba(20, 31, 25, .985), rgba(31, 43, 36, .975));
  box-shadow: 0 9px 32px rgba(26, 30, 25, .14);
  backdrop-filter: blur(18px);
}
.app-header::after {
  position: absolute;
  inset: auto 0 -1px;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, var(--gold), rgba(178, 139, 70, .2), transparent);
}
.header-inner {
  max-width: 1500px;
  height: 100%;
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 245px 1fr 158px;
  gap: 22px;
  align-items: center;
}
.brand {
  position: relative;
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 0;
  border: 0;
  color: #fffaf0;
  background: transparent;
  text-align: left;
}
.brand::after {
  position: absolute;
  right: 4px;
  width: 1px;
  height: 32px;
  content: "";
  background: linear-gradient(transparent, rgba(196, 162, 94, .5), transparent);
}
.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid #d3ad64;
  border-radius: 12px 12px 12px 4px;
  color: #fff8e8;
  background: linear-gradient(145deg, #b64a3d, #7d2826);
  box-shadow: inset 0 0 0 3px rgba(255, 246, 220, .1), 0 8px 24px rgba(113, 39, 33, .28);
  font-family: var(--kai);
  font-weight: 800;
  font-size: 22px;
}
.brand-mark::before {
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(255, 243, 211, .4);
  border-radius: 8px 8px 8px 2px;
  content: "";
}
.brand b, .brand small { display: block; }
.brand b { font-family: var(--serif); font-size: 18px; letter-spacing: .12em; }
.brand small { margin-top: 4px; color: #b9b8a9; font-size: 9px; letter-spacing: .09em; }
.main-nav {
  min-width: 0;
  display: flex;
  justify-content: center;
  gap: 3px;
}
.nav-button {
  position: relative;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 11px 13px;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 10px;
  color: #b7bdb5;
  background: transparent;
  font-size: 12px;
  white-space: nowrap;
  transition: color .22s ease, background .22s ease, transform .22s ease, border-color .22s ease;
}
.nav-button::after {
  position: absolute;
  right: 15px;
  bottom: 3px;
  left: 15px;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0;
  transform: scaleX(.2);
  transition: .24s ease;
}
.nav-button span {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid rgba(223, 201, 158, .2);
  border-radius: 7px 7px 7px 2px;
  color: #c1b18e;
  background: rgba(255, 250, 234, .025);
  font-family: var(--kai);
  font-size: 11px;
  transition: .22s ease;
}
.nav-button:hover {
  color: #fff8e8;
  border-color: rgba(215, 188, 133, .15);
  background: rgba(255, 250, 234, .055);
  transform: translateY(-1px);
}
.nav-button.active {
  color: #fffaf0;
  border-color: rgba(215, 188, 133, .2);
  background: linear-gradient(135deg, rgba(162, 59, 50, .2), rgba(178, 139, 70, .075));
}
.nav-button.active::after { opacity: 1; transform: scaleX(1); }
.nav-button.active span {
  color: #fff6df;
  border-color: rgba(216, 177, 102, .55);
  background: rgba(162, 59, 50, .35);
  box-shadow: inset 0 0 0 2px rgba(255, 245, 220, .05);
}
.ai-state {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid rgba(218, 197, 156, .16);
  border-radius: 999px;
  color: #b7bcb4;
  background: rgba(255, 250, 236, .04);
  font-size: 10px;
  letter-spacing: .04em;
}
.ai-state i { width: 7px; height: 7px; border-radius: 50%; background: #8c948c; }
.ai-state.online { color: #bfe0cd; border-color: rgba(111, 172, 139, .3); background: rgba(50, 103, 77, .18); }
.ai-state.online i { background: #76bd93; box-shadow: 0 0 0 4px rgba(118, 189, 147, .1), 0 0 12px rgba(118, 189, 147, .62); }
.ai-state.offline { color: #e3aaa2; border-color: rgba(198, 89, 75, .28); }
.ai-state.offline i { background: #c65b50; }

.app-main { max-width: 1330px; margin: 0 auto; padding: 44px 28px 78px; }
.page { display: none; }
.page.active { display: block; animation: pageIn .44s cubic-bezier(.22,.72,.28,1); }
@keyframes pageIn {
  from { opacity: 0; transform: translateY(12px) scale(.996); filter: blur(2px); }
  to { opacity: 1; transform: none; filter: none; }
}
.page-intro {
  position: relative;
  min-height: 130px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  margin-bottom: 27px;
  padding: 29px 32px 29px 38px;
  overflow: hidden;
  border: 1px solid #d4c7ae;
  border-radius: 22px 22px 22px 8px;
  background:
    radial-gradient(circle at 91% 15%, rgba(178, 139, 70, .14), transparent 17rem),
    radial-gradient(circle at 75% 120%, rgba(69, 107, 90, .1), transparent 19rem),
    linear-gradient(137deg, rgba(255, 253, 248, .97), rgba(246, 240, 226, .94));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.8), var(--shadow-sm);
}
.page-intro::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 5px;
  content: "";
  background: linear-gradient(var(--cinnabar), #cf8b63 55%, var(--gold));
}
.page-intro::after {
  position: absolute;
  top: -86px;
  right: -28px;
  width: 250px;
  height: 250px;
  border: 1px solid rgba(178, 139, 70, .16);
  border-radius: 50%;
  content: "";
  box-shadow:
    0 0 0 26px rgba(178, 139, 70, .028),
    0 0 0 52px rgba(69, 107, 90, .02);
}
.page-intro > * { position: relative; z-index: 1; }
.compact-intro { min-height: 150px; }
.eyebrow {
  color: var(--cinnabar);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .2em;
}
.eyebrow::before { content: "◆"; margin-right: 7px; color: var(--gold); font-size: 7px; vertical-align: 1px; }
.page-intro h1 {
  margin: 8px 0 9px;
  color: var(--ink-deep);
  font-family: var(--serif);
  font-size: clamp(29px, 3vw, 41px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: .035em;
}
.page-intro p { max-width: 760px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }
.intro-tip {
  flex: 0 0 315px;
  padding: 17px 19px;
  border: 1px solid rgba(166, 132, 70, .24);
  border-left: 3px solid var(--gold);
  border-radius: 4px 13px 13px 4px;
  background: rgba(255, 252, 242, .62);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.8);
}
.intro-tip span { color: var(--gold-deep); font-size: 10px; font-weight: 800; letter-spacing: .08em; }
.intro-tip p { margin-top: 6px; color: #6d7068; font-size: 11px; line-height: 1.7; }
.step-summary { display: flex; align-items: center; gap: 9px; white-space: nowrap; }
.step-summary span {
  padding: 8px 11px;
  border: 1px solid var(--line-soft);
  border-radius: 8px 8px 8px 3px;
  color: #817f75;
  background: rgba(255, 253, 248, .78);
  font-size: 10px;
  font-weight: 700;
}
.step-summary span.active { color: #fff9ec; border-color: var(--cinnabar-dark); background: linear-gradient(135deg, var(--cinnabar), var(--cinnabar-dark)); box-shadow: 0 7px 16px rgba(125,43,39,.16); }
.step-summary i { width: 23px; height: 1px; background: linear-gradient(90deg, var(--line), var(--gold), var(--line)); }

.quick-prompts { display: flex; gap: 9px; margin: -8px 0 19px; overflow-x: auto; padding: 8px 1px; }
.quick-prompts button, .filter-chips button {
  position: relative;
  flex: 0 0 auto;
  padding: 8px 13px;
  overflow: hidden;
  border: 1px solid #d8cfbd;
  border-radius: 999px;
  color: #62685f;
  background: rgba(255, 253, 248, .82);
  box-shadow: 0 4px 14px rgba(54, 48, 37, .03);
  font-size: 11px;
  transition: .22s ease;
}
.quick-prompts button::before { content: "问"; margin-right: 6px; color: var(--cinnabar); font-family: var(--kai); }
.quick-prompts button:hover, .filter-chips button:hover, .filter-chips button.active {
  color: var(--cinnabar-dark);
  border-color: #c5a668;
  background: #fffaf0;
  box-shadow: 0 8px 22px rgba(89, 70, 34, .08);
  transform: translateY(-2px);
}

.assistant-card, .simple-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius) var(--radius) var(--radius) 7px;
  background: rgba(255, 253, 248, .93);
  box-shadow: var(--shadow);
}
.simple-card {
  overflow: hidden;
  padding: 22px;
  transition: border-color .25s ease, box-shadow .25s ease, transform .25s ease;
}
.simple-card::before {
  position: absolute;
  top: 0;
  right: 24px;
  left: 24px;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, rgba(178, 139, 70, .45), transparent);
}
.assistant-card { overflow: hidden; }
.assistant-card::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  z-index: 2;
  content: "";
  background: linear-gradient(90deg, var(--cinnabar), #d19c5f 38%, var(--jade) 75%, transparent);
}
.assistant-head {
  height: 69px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 23px;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(255,253,248,.95), rgba(247,241,227,.72));
}
.assistant-avatar, .message-avatar {
  display: grid;
  place-items: center;
  border: 1px solid #c49b54;
  border-radius: 10px 10px 10px 3px;
  color: #fff8e7;
  background: linear-gradient(145deg, var(--cinnabar), var(--cinnabar-dark));
  box-shadow: inset 0 0 0 2px rgba(255, 246, 221, .08);
  font-family: var(--serif);
  font-weight: 800;
}
.assistant-avatar { width: 40px; height: 40px; font-size: 11px; letter-spacing: -.04em; }
.assistant-head b, .assistant-head small { display: block; }
.assistant-head b { color: var(--ink-deep); font-family: var(--serif); font-size: 15px; letter-spacing: .06em; }
.assistant-head small { margin-top: 3px; color: var(--muted-light); font-size: 9px; }
.text-button {
  position: relative;
  margin-left: auto;
  padding: 7px 10px;
  border: 0;
  border-bottom: 1px solid transparent;
  color: #6e736a;
  background: transparent;
  font-size: 10px;
  transition: .2s ease;
}
.text-button:hover { color: var(--cinnabar); border-bottom-color: rgba(162, 59, 50, .32); }
.chat-list {
  min-height: 325px;
  max-height: 570px;
  overflow-y: auto;
  padding: 27px;
  background:
    radial-gradient(circle at 10% 15%, rgba(69,107,90,.045), transparent 15rem),
    linear-gradient(rgba(255,253,248,.72), rgba(248,244,234,.72));
}
.message { display: flex; align-items: flex-start; gap: 11px; margin-bottom: 22px; animation: messageIn .28s ease both; }
@keyframes messageIn { from { opacity: 0; transform: translateY(7px); } }
.message.user-message { flex-direction: row-reverse; }
.message-avatar { flex: 0 0 32px; width: 32px; height: 32px; border-radius: 9px 9px 9px 3px; font-size: 9px; }
.user-message .message-avatar { color: var(--jade-dark); border-color: #bfcdbf; background: var(--jade-soft); }
.message-body {
  max-width: min(830px, 78%);
  padding: 14px 17px;
  border: 1px solid #e1d8c8;
  border-radius: 5px 15px 15px 15px;
  color: #414941;
  background: rgba(255, 254, 250, .96);
  box-shadow: 0 7px 20px rgba(61, 52, 37, .04);
  font-size: 12px;
  line-height: 1.9;
}
.user-message .message-body {
  color: #fffaf0;
  border-color: #5a796a;
  border-radius: 15px 5px 15px 15px;
  background: linear-gradient(138deg, #527766, #345848);
  box-shadow: 0 9px 22px rgba(52, 88, 72, .15);
}
.message-body p { margin: 7px 0; }
.message-body p:first-child { margin-top: 0; }
.message-body p:last-child { margin-bottom: 0; }
.message-body h3, .message-body h4 { margin: 19px 0 7px; color: var(--ink-deep); font-family: var(--serif); }
.message-body ul, .message-body ol { margin: 7px 0; padding-left: 21px; }
.message-body li { margin: 4px 0; }
.answer-hints { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 11px; }
.answer-hints span { padding: 4px 8px; border: 1px solid #e3dac8; border-radius: 5px; color: #6d7168; background: var(--paper-soft); font-size: 9px; }
.loading-dots { display: inline-flex; gap: 5px; padding: 5px 0; }
.loading-dots i { width: 6px; height: 6px; border-radius: 50%; background: var(--cinnabar); animation: dot 1s infinite alternate; }
.loading-dots i:nth-child(2) { animation-delay: .18s; background: var(--gold); }
.loading-dots i:nth-child(3) { animation-delay: .36s; background: var(--jade); }
@keyframes dot { to { opacity: .28; transform: translateY(-4px); } }
.composer { padding: 15px; border-top: 1px solid var(--line); background: rgba(255,253,248,.96); }
.composer textarea {
  width: 100%;
  min-height: 82px;
  padding: 13px 14px;
  resize: vertical;
  border: 1px solid transparent;
  border-radius: 10px;
  outline: 0;
  color: var(--ink);
  background: rgba(248, 244, 234, .52);
  line-height: 1.7;
  transition: .2s ease;
}
.composer textarea:focus { border-color: rgba(178,139,70,.5); background: #fffdf8; box-shadow: 0 0 0 4px rgba(178,139,70,.08); }
.composer textarea::placeholder, input::placeholder, textarea::placeholder { color: #a29f94; }
.composer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding: 8px 4px 0 12px; }
.composer-bottom > span { color: #9a988f; font-size: 9px; }

.primary-button, .secondary-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 41px;
  padding: 10px 16px;
  overflow: hidden;
  border-radius: 10px 10px 10px 4px;
  font-weight: 750;
  font-size: 11px;
  letter-spacing: .035em;
  isolation: isolate;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, color .2s ease, background .2s ease;
}
.primary-button::before, .secondary-button::before {
  position: absolute;
  top: -60%;
  left: -70%;
  z-index: -1;
  width: 50%;
  height: 220%;
  content: "";
  background: rgba(255,255,255,.22);
  transform: rotate(24deg);
  transition: left .5s ease;
}
.primary-button:hover::before, .secondary-button:hover::before { left: 125%; }
.primary-button {
  border: 1px solid #852e2a;
  color: #fffaf0;
  background: linear-gradient(135deg, #ad4439, #822d29);
  box-shadow: 0 9px 22px rgba(126, 44, 38, .2), inset 0 1px 0 rgba(255,255,255,.16);
}
.primary-button:hover:not(:disabled) { border-color: #6e2422; background: linear-gradient(135deg, #ba4b3d, #742522); box-shadow: 0 13px 28px rgba(126, 44, 38, .28); transform: translateY(-2px); }
.primary-button:active:not(:disabled), .secondary-button:active:not(:disabled) { transform: translateY(0) scale(.98); }
.secondary-button {
  border: 1px solid #cabb9d;
  color: var(--jade-dark);
  background: rgba(255,253,248,.88);
  box-shadow: inset 0 1px 0 #fff;
}
.secondary-button:hover { color: var(--cinnabar-dark); border-color: var(--gold); background: #fffaf0; box-shadow: 0 9px 22px rgba(91,72,38,.09); transform: translateY(-2px); }
.button-ripple {
  position: absolute;
  z-index: 3;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,.48);
  pointer-events: none;
  transform: translate(-50%, -50%) scale(0);
  animation: ripple .6s ease-out forwards;
}
@keyframes ripple { to { opacity: 0; transform: translate(-50%, -50%) scale(18); } }
.full-button { width: 100%; }
.file-button { position: relative; cursor: pointer; }
.file-button input { position: absolute; width: 1px; height: 1px; opacity: 0; }

.upload-card {
  display: grid;
  grid-template-columns: 60px 1fr auto;
  gap: 19px;
  align-items: center;
  padding: 23px 25px;
  border-style: dashed;
  border-color: #c7b898;
  box-shadow: none;
  background:
    radial-gradient(circle at 4% 50%, rgba(162,59,50,.055), transparent 10rem),
    rgba(255,253,248,.8);
}
.upload-card:hover { border-color: var(--gold); background-color: #fffaf2; box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.upload-symbol {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: 1px solid #d6bd8a;
  border-radius: 15px 15px 15px 5px;
  color: var(--cinnabar);
  background: linear-gradient(145deg, #fff8e9, #efe3ca);
  box-shadow: inset 0 0 0 3px rgba(255,255,255,.52);
  font-family: var(--serif);
  font-size: 25px;
}
.upload-card h2 { margin: 0 0 5px; color: var(--ink-deep); font-family: var(--serif); font-size: 17px; letter-spacing: .04em; }
.upload-card p { margin: 0; color: var(--muted); font-size: 11px; }
.button-group { display: flex; flex-wrap: wrap; gap: 8px; }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; margin: 18px 0; }
.metric-grid article {
  position: relative;
  overflow: hidden;
  padding: 18px 19px;
  border: 1px solid var(--line);
  border-radius: 14px 14px 14px 5px;
  background: rgba(255,253,248,.9);
  box-shadow: 0 7px 20px rgba(54,48,37,.035);
  transition: .22s ease;
}
.metric-grid article::after {
  position: absolute;
  top: 0;
  right: 0;
  width: 44px;
  height: 44px;
  border-radius: 0 0 0 44px;
  content: "";
  background: rgba(178,139,70,.08);
}
.metric-grid article:nth-child(2)::after { background: rgba(69,107,90,.09); }
.metric-grid article:nth-child(3)::after { background: rgba(176,110,47,.09); }
.metric-grid article:nth-child(4)::after { background: rgba(162,59,50,.08); }
.metric-grid article:hover { border-color: #c9b891; box-shadow: var(--shadow-sm); transform: translateY(-3px); }
.metric-grid span, .metric-grid b, .metric-grid small { display: block; }
.metric-grid span { color: #85847b; font-size: 9px; letter-spacing: .08em; }
.metric-grid b { margin: 8px 0 4px; color: var(--ink-deep); font-family: var(--serif); font-size: 23px; }
.metric-grid small { color: #9b998f; font-size: 9px; }
.metric-grid article.warn b { color: var(--warning); }
.metric-grid article.ready b { color: var(--success); font-size: 15px; }
.analysis-grid { display: grid; grid-template-columns: 335px minmax(0, 1fr); gap: 16px; align-items: stretch; }
.card-title { display: flex; align-items: flex-start; margin-bottom: 19px; }
.card-title.between { justify-content: space-between; gap: 16px; }
.card-title span, .card-title h2 { display: block; }
.card-title span { color: var(--cinnabar); font-size: 9px; font-weight: 800; letter-spacing: .15em; }
.card-title h2 { margin: 6px 0 0; color: var(--ink-deep); font-family: var(--serif); font-size: 18px; letter-spacing: .035em; }
.card-title > small { color: #929087; font-size: 10px; }
.field { display: grid; gap: 7px; margin-bottom: 14px; color: #5f685f; font-size: 10px; font-weight: 700; }
.field input, .field select, .field textarea, .knowledge-toolbar input, .ask-inline input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid #d9d0bf;
  border-radius: 9px 9px 9px 3px;
  outline: 0;
  color: var(--ink);
  background: rgba(255,254,250,.94);
  font-weight: 500;
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.field select {
  appearance: none;
  padding-right: 36px;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--gold-deep) 50%),
    linear-gradient(135deg, var(--gold-deep) 50%, transparent 50%);
  background-position: calc(100% - 17px) 50%, calc(100% - 12px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}
.field textarea { resize: vertical; line-height: 1.7; }
.field input:hover, .field select:hover, .field textarea:hover, .knowledge-toolbar input:hover, .ask-inline input:hover { border-color: #c6b58f; }
.field input:focus, .field select:focus, .field textarea:focus, .knowledge-toolbar input:focus, .ask-inline input:focus {
  border-color: var(--gold);
  background: #fffdf8;
  box-shadow: 0 0 0 4px rgba(178,139,70,.09);
}
.check-row {
  display: grid;
  grid-template-columns: 19px 1fr;
  gap: 9px;
  align-items: start;
  margin-bottom: 8px;
  padding: 10px;
  border: 1px solid #e8e1d3;
  border-radius: 9px 9px 9px 3px;
  background: rgba(255,255,255,.28);
  cursor: pointer;
  transition: .2s ease;
}
.check-row:hover { border-color: #cbb991; background: #fffaf0; }
.check-row:has(input:checked) { border-color: rgba(69,107,90,.38); background: var(--jade-soft); }
.check-row input { width: 15px; height: 15px; margin-top: 3px; accent-color: var(--jade); }
.check-row b, .check-row small { display: block; }
.check-row b { color: #475148; font-size: 10px; }
.check-row small { margin-top: 3px; color: #8f9188; font-size: 9px; line-height: 1.5; }
.settings-card .primary-button { margin-top: 10px; }
.result-note { margin-top: 11px; padding: 11px; border: 1px solid #e5dece; border-radius: 8px 8px 8px 3px; color: #767b72; background: var(--paper-soft); font-size: 9px; line-height: 1.6; }
.result-note.success { color: var(--jade-dark); border-color: #cbd9ce; background: var(--jade-soft); }
.table-card { min-width: 0; }
.table-wrap { width: 100%; overflow: auto; border-radius: 9px; }
table { width: 100%; border-collapse: collapse; font-size: 10px; }
th, td { padding: 11px 12px; border-bottom: 1px solid #e9e2d4; text-align: left; white-space: nowrap; }
th { color: #5d655e; background: #f2ecdf; font-weight: 800; letter-spacing: .025em; }
td { color: #576159; background: rgba(255,254,250,.52); }
tbody tr { transition: .18s ease; }
tbody tr:hover td { background: #fff8e9; }
.empty-cell { height: 180px; color: #98988f; text-align: center; }
.missing-value { padding: 3px 6px; border-radius: 4px; color: #a2642c; background: #f9ead4; font-size: 9px; }
.stats-card { margin-top: 16px; min-width: 0; box-shadow: var(--shadow-sm); }

.modeling-layout { display: grid; grid-template-columns: 435px minmax(0,1fr); gap: 17px; align-items: stretch; }
.modeling-form { box-shadow: var(--shadow-sm); }
.modeling-form::after {
  position: absolute;
  right: -35px;
  bottom: -35px;
  width: 115px;
  height: 115px;
  border: 1px solid rgba(162,59,50,.09);
  border-radius: 50%;
  content: "";
  box-shadow: 0 0 0 18px rgba(178,139,70,.025);
  pointer-events: none;
}
.form-two { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.ai-result-card { min-height: 545px; background: linear-gradient(145deg, rgba(255,253,248,.96), rgba(246,241,230,.9)); }
.empty-result { min-height: 495px; display: grid; place-items: center; align-content: center; text-align: center; color: #858980; }
.empty-result > span {
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  margin-bottom: 13px;
  border: 1px solid #d2b571;
  border-radius: 18px 18px 18px 6px;
  color: #fff8e7;
  background: linear-gradient(145deg, #aa4438, #7b2a26);
  box-shadow: inset 0 0 0 4px rgba(255,246,220,.09), 0 10px 28px rgba(120,48,40,.17);
  font-family: var(--kai);
  font-weight: 850;
  font-size: 22px;
}
.empty-result h2 { margin: 0 0 8px; color: var(--ink-soft); font-family: var(--serif); font-size: 18px; letter-spacing: .04em; }
.empty-result p { max-width: 340px; margin: 0; font-size: 10px; line-height: 1.75; }
.generated-answer { color: #414a42; font-size: 12px; line-height: 1.9; }
.generated-answer h3, .generated-answer h4 {
  position: relative;
  margin: 22px 0 8px;
  padding-left: 13px;
  color: var(--ink-deep);
  font-family: var(--serif);
}
.generated-answer h3::before, .generated-answer h4::before { position: absolute; top: .25em; bottom: .2em; left: 0; width: 3px; border-radius: 2px; content: ""; background: var(--cinnabar); }
.generated-answer p { margin: 8px 0; }
.generated-answer ul, .generated-answer ol { padding-left: 22px; }
.generated-answer li { margin: 5px 0; }
.result-loading { min-height: 470px; display: grid; place-items: center; align-content: center; color: #767b73; font-size: 11px; }

.knowledge-count {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 15px 18px;
  border: 1px solid #dbcaa8;
  border-radius: 13px 13px 13px 5px;
  background: rgba(255,253,248,.78);
  box-shadow: var(--shadow-sm);
}
.knowledge-count b { color: var(--cinnabar); font-family: var(--serif); font-size: 28px; }
.knowledge-count span { color: #777b72; font-size: 9px; }
.knowledge-ask {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 21px;
  align-items: center;
  margin-bottom: 19px;
  background:
    radial-gradient(circle at 0 50%, rgba(162,59,50,.06), transparent 13rem),
    rgba(255,253,248,.94);
}
.knowledge-ask h2 { margin: 7px 0 0; color: var(--ink-deep); font-family: var(--serif); font-size: 19px; }
.ask-inline { display: grid; grid-template-columns: 1fr auto; gap: 9px; }
.knowledge-answer { grid-column: 1 / -1; padding: 18px; border: 1px solid #d9c9a9; border-radius: 12px 12px 12px 4px; color: #485048; background: #fffaf0; font-size: 11px; line-height: 1.8; }
.knowledge-answer[hidden] { display: none; }
.reference-list { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 13px; }
.reference-list a { padding: 5px 9px; border: 1px solid #d6c39d; border-radius: 7px 7px 7px 3px; color: var(--cinnabar-dark); background: #fffdf8; text-decoration: none; font-size: 9px; transition: .18s ease; }
.reference-list a:hover { border-color: var(--cinnabar); background: var(--cinnabar-soft); transform: translateY(-1px); }
.knowledge-toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.knowledge-toolbar > input { max-width: 335px; }
.filter-chips { display: flex; gap: 6px; overflow-x: auto; padding: 2px 0; }
.filter-chips button.active::before { content: "•"; margin-right: 5px; color: var(--cinnabar); }
.knowledge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.knowledge-item {
  position: relative;
  overflow: hidden;
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: 15px 15px 15px 5px;
  background: rgba(255,253,248,.9);
  box-shadow: 0 7px 20px rgba(54,48,37,.035);
  transition: .25s cubic-bezier(.2,.7,.2,1);
}
.knowledge-item::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  content: "";
  background: linear-gradient(var(--cinnabar), var(--gold));
  transition: height .28s ease;
}
.knowledge-item:hover { transform: translateY(-5px); border-color: #c9b78f; background: #fffdf8; box-shadow: var(--shadow-hover); }
.knowledge-item:hover::before { height: 100%; }
.knowledge-item > span { color: var(--cinnabar); font-size: 9px; font-weight: 800; letter-spacing: .1em; }
.knowledge-item h3 { margin: 9px 0; color: var(--ink-deep); font-family: var(--serif); font-size: 15px; line-height: 1.45; }
.knowledge-item p { min-height: 57px; margin: 0; color: #6f756d; font-size: 10px; line-height: 1.72; }
.knowledge-meta { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 15px; padding-top: 13px; border-top: 1px solid #e9e1d2; color: #929188; font-size: 8px; }
.knowledge-meta a { color: var(--jade-dark); text-decoration: none; font-weight: 700; }
.knowledge-meta a:hover { color: var(--cinnabar); }

.viz-source { display: inline-flex; align-items: center; gap: 8px; padding: 9px 13px; border: 1px solid #d5c9b3; border-radius: 999px; color: #777d74; background: rgba(255,253,248,.78); font-size: 9px; }
.viz-source i { width: 7px; height: 7px; border-radius: 50%; background: #a5a79e; }
.viz-source.ready { color: var(--jade-dark); border-color: #bfcfc3; background: var(--jade-soft); }
.viz-source.ready i { background: #5c9774; box-shadow: 0 0 0 4px rgba(92,151,116,.09); }
.viz-toolbar { display: flex; align-items: end; gap: 11px; margin-bottom: 17px; box-shadow: var(--shadow-sm); }
.viz-toolbar .button-group { flex: 1; }
.inline-field { width: 150px; margin: 0; }
.viz-layout { display: grid; grid-template-columns: minmax(0,1fr) 275px; gap: 17px; }
.chart-card { min-width: 0; }
.chart-wrap { position: relative; overflow: hidden; border: 1px solid #ded3be; border-radius: 13px 13px 13px 5px; background: #faf6ed; }
.chart-wrap canvas { display: block; width: 100%; height: auto; }
.chart-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  color: #8e9188;
  background:
    radial-gradient(circle at 50% 45%, rgba(178,139,70,.1), transparent 12rem),
    #faf6ed;
}
.chart-placeholder span {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin-bottom: 10px;
  border: 1px solid #d0b675;
  border-radius: 16px 16px 16px 5px;
  color: var(--cinnabar);
  background: var(--gold-soft);
  font-family: var(--kai);
  font-weight: 850;
  font-size: 20px;
}
.chart-placeholder p { margin: 0; font-size: 10px; }
.insight-card { box-shadow: var(--shadow-sm); }
.insight-empty { padding: 25px 4px; color: #8c9087; font-size: 10px; line-height: 1.75; }
.insight-list { display: grid; gap: 10px; }
.insight-list article { position: relative; padding: 13px; overflow: hidden; border: 1px solid #e7dece; border-radius: 10px 10px 10px 3px; background: var(--paper-soft); transition: .2s ease; }
.insight-list article:hover { border-color: #cdb98e; background: #fffaf0; transform: translateX(2px); }
.insight-list article::after { position: absolute; top: -13px; right: -13px; width: 36px; height: 36px; border-radius: 50%; content: ""; background: rgba(178,139,70,.09); }
.insight-list span, .insight-list b, .insight-list small { display: block; }
.insight-list span { color: #888b82; font-size: 8px; letter-spacing: .06em; }
.insight-list b { margin: 6px 0 3px; color: var(--ink-soft); font-family: var(--serif); font-size: 18px; }
.insight-list small { color: #8a8e85; font-size: 9px; line-height: 1.5; }

.toast {
  position: fixed;
  right: 25px;
  bottom: 25px;
  z-index: 100;
  max-width: 360px;
  padding: 13px 16px 13px 18px;
  border: 1px solid #c9aa67;
  border-left: 4px solid var(--cinnabar);
  border-radius: 11px 11px 11px 4px;
  color: #fff8e9;
  background: linear-gradient(135deg, rgba(30,43,35,.97), rgba(42,55,46,.97));
  box-shadow: 0 16px 42px rgba(25,31,26,.23);
  font-size: 11px;
  opacity: 0;
  transform: translateY(14px) scale(.98);
  pointer-events: none;
  transition: .25s ease;
}
.toast.show { opacity: 1; transform: none; }

.reveal-item { opacity: 0; transform: translateY(14px); }
.reveal-item.revealed { opacity: 1; transform: none; transition: opacity .5s ease, transform .5s cubic-bezier(.2,.75,.25,1); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  body::before { display: none; }
}
@media (max-width: 1120px) {
  .header-inner { grid-template-columns: 190px 1fr 38px; padding: 0 18px; }
  .brand::after, .brand small { display: none; }
  .nav-button { padding: 9px 10px; font-size: 10px; }
  .ai-state { width: 35px; height: 35px; padding: 0; justify-content: center; }
  .ai-state span { display: none; }
  .analysis-grid, .modeling-layout { grid-template-columns: 1fr; }
  .ai-result-card { min-height: 390px; }
  .empty-result, .result-loading { min-height: 340px; }
  .knowledge-grid { grid-template-columns: repeat(2, 1fr); }
  .viz-toolbar { flex-wrap: wrap; }
  .viz-toolbar .button-group { flex-basis: 100%; }
}
@media (max-width: 840px) {
  .app-header { height: auto; }
  .header-inner { min-height: 69px; grid-template-columns: 1fr auto; gap: 10px; padding: 10px 16px 0; }
  .brand { grid-column: 1; }
  .ai-state { grid-column: 2; }
  .main-nav { grid-column: 1 / -1; order: 3; justify-content: flex-start; overflow-x: auto; padding-bottom: 9px; }
  .nav-button { flex: 0 0 auto; }
  .app-main { padding: 28px 16px 58px; }
  .page-intro, .compact-intro { min-height: 0; align-items: flex-start; flex-direction: column; padding: 24px 22px 24px 28px; }
  .page-intro::after { opacity: .45; }
  .intro-tip { flex: auto; width: 100%; }
  .step-summary { width: 100%; overflow-x: auto; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .upload-card { grid-template-columns: 48px 1fr; }
  .upload-card .button-group { grid-column: 1 / -1; }
  .knowledge-ask { grid-template-columns: 1fr; }
  .knowledge-answer { grid-column: auto; }
  .knowledge-toolbar { align-items: stretch; flex-direction: column; }
  .knowledge-toolbar > input { max-width: none; }
  .viz-layout { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .brand-mark { width: 38px; height: 38px; font-size: 19px; }
  .brand b { font-size: 15px; }
  .nav-button span { display: none; }
  .page-intro h1 { font-size: 27px; }
  .metric-grid, .knowledge-grid, .form-two { grid-template-columns: 1fr; }
  .composer-bottom { align-items: stretch; flex-direction: column; }
  .composer-bottom > span { display: none; }
  .composer-bottom button { width: 100%; }
  .message-body { max-width: 86%; }
  .simple-card { padding: 18px; }
  .ask-inline { grid-template-columns: 1fr; }
  .viz-toolbar { align-items: stretch; flex-direction: column; }
  .inline-field { width: 100%; }
  .viz-toolbar .primary-button { width: 100%; }
  .toast { right: 16px; bottom: 16px; left: 16px; max-width: none; }
}