:root {
  --bg: #0a0e13;
  --bg-2: #0e141b;
  --panel: #121a23;
  --panel-2: #16202b;
  --line: #233140;
  --line-soft: #1b2733;
  --text: #e8eef6;
  --muted: #8fa1b6;
  --dim: #65758a;
  --accent: #ff7043;
  --accent-2: #ffb03a;
  --green: #3ddc97;
  --red: #ff6272;
  --blue: #64b5f6;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, .38);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.65;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(900px 500px at 12% -8%, rgba(255, 112, 67, .10), transparent 60%),
    radial-gradient(800px 450px at 92% 0%, rgba(100, 181, 246, .08), transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  background-attachment: fixed;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

/* ---------- header ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(14px);
  background: rgba(10, 14, 19, .78);
  border-bottom: 1px solid var(--line-soft);
}
.topbar-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 62px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  letter-spacing: .3px;
}
.brand:hover { text-decoration: none; }
.logo {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 800;
  color: #1a0f08;
  background: linear-gradient(145deg, var(--accent-2), var(--accent));
  box-shadow: 0 4px 16px rgba(255, 112, 67, .3);
}
.brand small {
  display: block;
  color: var(--muted);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .5px;
}
.topbar-spacer { flex: 1; }
.topbar-links { display: inline-flex; gap: 6px; margin-right: 8px; }
.topbar-links a {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
  text-decoration: none;
  transition: color .15s, border-color .15s, background .15s;
}
.topbar-links a:hover {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(255, 112, 67, .1);
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}
.pill .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

/* ---------- hero ---------- */
.hero { padding: 48px 0 26px; }
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-2);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.kicker::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--accent);
}
h1 {
  margin: 0 0 10px;
  font-size: clamp(28px, 4.4vw, 46px);
  line-height: 1.18;
  letter-spacing: -.6px;
}
h1 .hl { color: var(--accent); }
.lede {
  max-width: 800px;
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 15px;
}

.search-shell {
  position: relative;
  max-width: 860px;
}
.search-form {
  display: flex;
  gap: 10px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(22, 32, 43, .95), rgba(14, 20, 27, .95));
  box-shadow: 0 10px 40px rgba(0, 0, 0, .3), inset 0 1px 0 rgba(255, 255, 255, .04);
  transition: border-color .2s, box-shadow .2s;
}
.search-form:focus-within {
  border-color: rgba(255, 112, 67, .65);
  box-shadow: 0 0 0 4px rgba(255, 112, 67, .13), 0 12px 40px rgba(0, 0, 0, .35);
}
.search-input {
  flex: 1;
  min-width: 0;
  padding: 12px 12px 12px 16px;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 16px;
  font-family: inherit;
}
.search-input::placeholder { color: var(--dim); }
.search-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 24px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(145deg, var(--accent), #e85a2e);
  color: #1b0d06;
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: transform .15s, filter .15s;
}
.search-btn:hover { filter: brightness(1.06); transform: translateY(-1px); }
.search-btn:active { transform: translateY(0); }
.search-btn .kbd {
  font-size: 11px;
  opacity: .72;
  border: 1px solid rgba(0, 0, 0, .28);
  border-radius: 5px;
  padding: 1px 5px;
}

.suggests {
  position: absolute;
  z-index: 20;
  left: 0;
  right: 0;
  top: calc(100% + 8px);
  max-height: 440px;
  overflow: auto;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(18, 26, 35, .98);
  box-shadow: var(--shadow);
}
.suggests.hidden { display: none; }
.sug-group + .sug-group { margin-top: 6px; padding-top: 6px; border-top: 1px solid var(--line-soft); }
.sug-label {
  padding: 4px 10px;
  color: var(--dim);
  font-size: 11px;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}
.sug-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  padding: 9px 10px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--text);
  text-align: left;
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
}
.sug-item:hover, .sug-item.active { background: rgba(255, 112, 67, .11); }
.sug-item b { font-weight: 600; }
.sug-item span {
  color: var(--muted);
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sug-item .kind {
  flex: 0 0 auto;
  padding: 1px 7px;
  border-radius: 999px;
  background: rgba(100, 181, 246, .12);
  color: var(--blue);
  font-size: 10px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.chips-label { align-self: center; color: var(--dim); font-size: 12px; margin-right: 2px; }
.chip {
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(22, 32, 43, .55);
  color: var(--muted);
  font-family: inherit;
  font-size: 12.5px;
  cursor: pointer;
  transition: all .15s;
}
.chip:hover {
  border-color: rgba(255, 112, 67, .55);
  color: var(--accent-2);
  background: rgba(255, 112, 67, .08);
}

/* ---------- layout ---------- */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  align-items: start;
  padding-bottom: 80px;
}
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .side { order: -1; }
}

/* ---------- answer ---------- */
.answer-zone { min-height: 200px; }
.empty {
  padding: 38px 30px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}
.empty h3 { margin: 0 0 8px; color: var(--text); font-size: 17px; }
.empty p { margin: 0; font-size: 13px; }

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(22, 32, 43, .9), rgba(16, 23, 31, .92));
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: rise .25s ease both;
}
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.card-top {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 22px 24px 18px;
  border-bottom: 1px solid var(--line-soft);
}
.mode-badge {
  flex: 0 0 auto;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .4px;
  border: 1px solid;
}
.mode-faq { color: var(--green); border-color: rgba(61, 220, 151, .35); background: rgba(61, 220, 151, .1); }
.mode-command { color: var(--accent-2); border-color: rgba(255, 176, 58, .35); background: rgba(255, 176, 58, .1); }
.mode-doc { color: var(--blue); border-color: rgba(100, 181, 246, .35); background: rgba(100, 181, 246, .1); }
.mode-refuse { color: var(--red); border-color: rgba(255, 98, 114, .35); background: rgba(255, 98, 114, .1); }

.card-heading { flex: 1; min-width: 0; }
.card-title {
  margin: 0 0 4px;
  font-size: clamp(20px, 2.6vw, 27px);
  line-height: 1.3;
  letter-spacing: -.3px;
  word-break: break-word;
}
.card-sub { color: var(--dim); font-size: 12px; }
.conf {
  flex: 0 0 auto;
  text-align: right;
  color: var(--muted);
  font-size: 11px;
}
.conf-bar {
  width: 62px;
  height: 4px;
  margin-top: 5px;
  border-radius: 4px;
  background: var(--line);
  overflow: hidden;
}
.conf-fill { height: 100%; border-radius: 4px; background: linear-gradient(90deg, var(--accent), var(--green)); }

.card-body { padding: 20px 24px 6px; }
.lead {
  margin: 0 0 18px;
  padding: 13px 16px;
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  background: rgba(255, 112, 67, .07);
  color: #f3d9ce;
  font-size: 15px;
}
.section { margin: 0 0 20px; }
.section h4 {
  margin: 0 0 9px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
}
.steps { margin: 0; padding: 0; list-style: none; counter-reset: s; }
.steps li {
  position: relative;
  margin: 0 0 11px;
  padding: 12px 14px 12px 46px;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  background: rgba(10, 14, 19, .35);
  white-space: pre-wrap;
  word-break: break-word;
}
.steps li::before {
  counter-increment: s;
  content: counter(s);
  position: absolute;
  left: 12px;
  top: 12px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(255, 112, 67, .16);
  color: var(--accent-2);
  font-size: 11px;
  font-weight: 700;
}
.code {
  margin: 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #090d12;
  color: #d7e3f2;
  font-family: "Cascadia Code", Consolas, "Courier New", monospace;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}
.excerpt {
  margin: 0;
  padding: 16px;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  background: rgba(9, 13, 18, .58);
  color: #cbd8e8;
  font-size: 13.5px;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 460px;
  overflow: auto;
}
.kv { display: flex; flex-wrap: wrap; gap: 6px; }
.kv .tag {
  padding: 2px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  font-size: 12px;
}
.note { color: var(--muted); font-size: 13px; }

.gates {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 24px 18px;
}
.gate {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border-radius: 999px;
  font-size: 11px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: rgba(10, 14, 19, .35);
}
.gate.ok { color: var(--green); border-color: rgba(61, 220, 151, .3); }
.gate.warn { color: var(--accent-2); border-color: rgba(255, 176, 58, .3); }

.evidence {
  margin: 0 24px 18px;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  overflow: hidden;
}
.evidence summary {
  padding: 10px 14px;
  cursor: pointer;
  color: var(--muted);
  font-size: 12.5px;
  list-style: none;
  background: rgba(10, 14, 19, .35);
}
.evidence summary::-webkit-details-marker { display: none; }
.evidence summary::before { content: "▸ "; color: var(--accent); }
.evidence[open] summary::before { content: "▾ "; }
.evidence-body {
  padding: 14px;
  border-top: 1px solid var(--line-soft);
  color: #c4d2e3;
  font-size: 12.5px;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 420px;
  overflow: auto;
}
.evidence-body + .evidence-body { border-top: 1px dashed var(--line-soft); }

.sources { padding: 0 24px 18px; }
.source-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  margin-bottom: 6px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: rgba(10, 14, 19, .3);
  color: var(--text);
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.source-item:hover { border-color: rgba(100, 181, 246, .45); background: rgba(100, 181, 246, .06); }
.source-ico {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: 7px;
  display: grid;
  place-items: center;
  background: rgba(100, 181, 246, .12);
  color: var(--blue);
  font-size: 10px;
  font-weight: 700;
}
.source-item b { font-size: 13px; font-weight: 600; }
.source-item small { display: block; color: var(--dim); font-size: 11px; }

.related { padding: 0 24px 20px; }
.related .chip { margin: 0 6px 6px 0; }

.feedback {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px 20px;
  border-top: 1px solid var(--line-soft);
}
.feedback .ask { color: var(--dim); font-size: 12px; margin-right: 4px; }
.fb-btn {
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
}
.fb-btn:hover { color: var(--text); border-color: var(--accent); }
.feedback .spacer { flex: 1; }
.copy-btn { background: transparent; border: 0; color: var(--dim); font-size: 12px; cursor: pointer; font-family: inherit; }
.copy-btn:hover { color: var(--accent-2); }

.refuse-body { padding: 22px 24px; }
.refuse-icon {
  width: 42px;
  height: 42px;
  margin-bottom: 14px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 98, 114, .35);
  color: var(--red);
  font-size: 18px;
}
.refuse-body h3 { margin: 0 0 8px; font-size: 18px; }
.refuse-body p { margin: 0 0 12px; color: var(--muted); font-size: 14px; }
.refuse-hint {
  padding: 12px 14px;
  border: 1px solid var(--line-soft);
  border-radius: 9px;
  background: rgba(10, 14, 19, .35);
  color: var(--muted);
  font-size: 13px;
}
.refuse-hint pre { margin: 8px 0 0; white-space: pre-wrap; font-family: inherit; font-size: 12px; color: var(--dim); }

/* ---------- side ---------- */
.side { position: sticky; top: 86px; display: flex; flex-direction: column; gap: 16px; }
@media (max-width: 980px) { .side { position: static; } }
.panel {
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(22, 32, 43, .72), rgba(16, 23, 31, .8));
}
.panel h3 {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--muted);
  text-transform: uppercase;
}
.panel p { margin: 0 0 10px; color: var(--muted); font-size: 12.5px; }
.gate-list { margin: 0; padding: 0; list-style: none; }
.gate-list li {
  display: flex;
  gap: 9px;
  padding: 7px 0;
  border-bottom: 1px dashed var(--line-soft);
  color: var(--muted);
  font-size: 12.5px;
}
.gate-list li:last-child { border-bottom: 0; }
.gate-list .n {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 1px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(61, 220, 151, .12);
  color: var(--green);
  font-size: 10px;
  font-weight: 700;
}
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.stat {
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  border-radius: 9px;
  background: rgba(10, 14, 19, .3);
}
.stat b { display: block; color: var(--text); font-size: 19px; line-height: 1.2; }
.stat span { color: var(--dim); font-size: 11px; }
.popular { display: flex; flex-wrap: wrap; gap: 6px; }
.popular .chip { font-size: 12px; }

footer {
  padding: 26px 0 40px;
  border-top: 1px solid var(--line-soft);
  color: var(--dim);
  font-size: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: space-between;
}

/* ---------- modal ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(4, 7, 10, .72);
  backdrop-filter: blur(6px);
}
.modal.hidden { display: none; }
.modal-card {
  width: min(900px, 100%);
  max-height: min(86vh, 900px);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #0f161e;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .6);
  overflow: hidden;
  animation: rise .2s ease both;
}
.modal-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line-soft);
}
.modal-head h3 { margin: 0 0 4px; font-size: 18px; line-height: 1.35; }
.modal-head small { color: var(--dim); font-size: 11.5px; }
.modal-head .close {
  margin-left: auto;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 16px;
  cursor: pointer;
}
.modal-head .close:hover { color: var(--text); border-color: var(--accent); }
.modal-body {
  padding: 20px 24px 30px;
  overflow: auto;
  color: #cfdbeb;
  font-size: 13.5px;
}
.modal-body h1 { font-size: 24px; margin: 4px 0 14px; }
.modal-body h2 { font-size: 19px; margin: 22px 0 10px; }
.modal-body h3 { font-size: 16px; margin: 18px 0 8px; }
.modal-body p { margin: 0 0 10px; }
.modal-body table { width: 100%; border-collapse: collapse; margin: 10px 0 16px; font-size: 12.5px; }
.modal-body th, .modal-body td { padding: 7px 9px; border: 1px solid var(--line-soft); text-align: left; vertical-align: top; }
.modal-body th { background: rgba(255, 255, 255, .03); color: var(--muted); font-weight: 600; }
.modal-body pre { padding: 13px 14px; border: 1px solid var(--line); border-radius: 9px; background: #090d12; overflow: auto; font-size: 12px; }
.modal-body code { padding: 1px 4px; border-radius: 4px; background: rgba(255, 255, 255, .06); font-family: Consolas, monospace; font-size: .92em; }
.modal-body blockquote { margin: 10px 0; padding: 8px 14px; border-left: 3px solid var(--line); color: var(--muted); }
.modal-body ul, .modal-body ol { margin: 8px 0 12px; padding-left: 22px; }
.modal-body .img-pill { display: inline-block; padding: 0 6px; border: 1px dashed var(--line); border-radius: 4px; color: var(--dim); font-size: 11px; }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  z-index: 80;
  transform: translateX(-50%) translateY(10px);
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #17212c;
  color: var(--text);
  font-size: 13px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 620px) {
  .wrap { width: calc(100% - 24px); }
  .topbar-inner { height: 56px; }
  .brand small { display: none; }
  .topbar .pill { display: none; }
  .hero { padding-top: 32px; }
  .search-form { flex-wrap: wrap; }
  .search-btn { width: 100%; justify-content: center; padding: 11px 18px; }
  .search-btn .kbd { display: none; }
  .card-top { padding: 18px 16px 14px; flex-wrap: wrap; }
  .conf { text-align: left; }
  .card-body { padding: 16px 16px 4px; }
  .gates, .sources, .related { padding-left: 16px; padding-right: 16px; }
  .evidence { margin-left: 16px; margin-right: 16px; }
  .feedback { padding: 12px 16px 16px; flex-wrap: wrap; }
  .modal { padding: 10px; }
  .modal-card { max-height: 92vh; }
}