:root {
  color-scheme: dark;
  --bg: #071116;
  --panel: rgba(10, 23, 28, .88);
  --line: rgba(121, 183, 181, .17);
  --line-strong: rgba(92, 213, 194, .35);
  --text: #d8e5e2;
  --muted: #728a8d;
  --mint: #63d5bf;
  --cyan: #8cdbda;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --sans: "Microsoft YaHei", "PingFang SC", sans-serif;
}

* { box-sizing: border-box; }
html { min-width: 320px; min-height: 100%; background: var(--bg); }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--sans);
  background:
    radial-gradient(ellipse at 51% 6%, rgba(34, 111, 109, .17), transparent 34rem),
    linear-gradient(rgba(111, 169, 166, .025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(111, 169, 166, .025) 1px, transparent 1px),
    var(--bg);
  background-size: auto, 48px 48px, 48px 48px, auto;
}
button, input { font: inherit; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
#ambient, .scanlines { position: fixed; inset: 0; pointer-events: none; }
#ambient { z-index: 0; opacity: .65; }
.scanlines {
  z-index: 5;
  opacity: .09;
  background: repeating-linear-gradient(to bottom, transparent 0, transparent 3px, rgba(0, 0, 0, .4) 4px);
}
.shell { position: relative; z-index: 1; max-width: 1600px; min-height: 100vh; margin: auto; padding: 0 46px; }
.topbar { height: 78px; display: flex; align-items: center; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 270px; }
.brand-mark {
  width: 38px; height: 38px; display: grid; place-items: center;
  border: 1px solid var(--line-strong); color: var(--mint); font-size: 19px;
  box-shadow: inset 0 0 17px rgba(76, 203, 181, .08), 0 0 15px rgba(76, 203, 181, .08);
}
.brand-copy { display: grid; gap: 3px; }
.brand-copy strong { font: 600 15px var(--mono); letter-spacing: .1em; }
.brand-copy small { color: var(--muted); font: 9px var(--mono); letter-spacing: .14em; }
.accent { color: var(--mint); }
.top-status { display: flex; align-items: center; gap: 10px; color: #a2b7b6; font: 10px var(--mono); letter-spacing: .09em; }
.live-dot, .side-signal { color: var(--mint); text-shadow: 0 0 9px var(--mint); }
.live-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--mint); animation: blink 1.8s infinite; }
.top-divider { color: #3b6265; }
.official-link { margin-left: auto; padding: 9px 12px; border: 1px solid var(--line); color: #a5c4c1; font-size: 12px; transition: .2s ease; }
.official-link:hover { border-color: var(--mint); color: var(--mint); }
.official-link span { color: var(--mint); margin-left: 7px; }
.layout { display: grid; grid-template-columns: 218px minmax(420px, 1fr) 240px; grid-template-areas: "left main right"; gap: 19px; padding-top: 28px; align-items: stretch; }
.panel { border: 1px solid var(--line); background: rgba(10, 23, 28, .96); }
.left-rail { grid-area: left; position: relative; min-height: 0; padding: 23px 15px 16px; }
.rail-heading, .side-title { display: flex; justify-content: space-between; align-items: center; }
.eyebrow { color: #769496; font: 9px var(--mono); letter-spacing: .15em; }
.rail-code { color: #476366; font: 9px var(--mono); }
.left-rail h2, .side-card h2 { margin: 21px 0 14px; font-size: 14px; font-weight: 500; letter-spacing: .08em; }
.category-list { display: grid; gap: 5px; }
.category-button {
  width: 100%; min-height: 46px; display: flex; align-items: center; gap: 10px;
  border: 1px solid transparent; background: transparent; padding: 0 9px;
  color: #8ca1a2; text-align: left; cursor: pointer; font-size: 14px; transition: .18s ease;
}
.category-button:hover { color: var(--text); background: rgba(79, 180, 169, .055); }
.category-button.active { color: #cde9e4; border-color: rgba(83, 196, 180, .2); background: rgba(48, 135, 125, .12); }
.category-marker { color: #557275; font: 9px var(--mono); }
.category-button.active .category-marker { color: var(--mint); }
.category-count { margin-left: auto; color: #557275; font: 8px var(--mono); }
.category-button.active .category-count { color: #8ebdb4; }
.category-arrow { margin-left: auto; opacity: 0; color: var(--mint); }
.category-button.active .category-arrow { opacity: 1; }
.admin-access-row { display: flex; align-items: stretch; gap: 5px; margin-top: 13px; }
.admin-access-link { display: grid; flex: 1; gap: 5px; min-width: 0; padding: 10px 9px; border: 1px solid rgba(99, 213, 191, .22); background: rgba(83, 168, 157, .045); color: #9ec8be; }
.admin-access-link:hover, .admin-access-link:focus-visible { border-color: var(--line-strong); color: var(--mint); outline: none; }
.admin-access-label { font-size: 11px; }
.admin-access-url { overflow-wrap: anywhere; color: #6f9992; font: 8px/1.6 var(--mono); }
.admin-access-row > .copy-url-button { align-self: center; font-family: var(--sans); }
.rail-note { position: absolute; left: 15px; right: 15px; bottom: 53px; display: flex; align-items: flex-start; gap: 10px; padding: 12px 9px; border-top: 1px solid var(--line); }
.note-icon { color: var(--mint); font: 20px var(--mono); }
.rail-note p { margin: 2px 0; color: #a3b9b6; font-size: 11px; line-height: 1.8; }
.rail-note p span { color: var(--muted); font-size: 10px; }
.rail-footer { position: absolute; left: 15px; right: 15px; bottom: 16px; color: #667e81; font: 8px var(--mono); letter-spacing: .08em; }
.rail-footer span { float: right; color: var(--mint); }
.main-column { grid-area: main; min-width: 0; }
.intro { height: 198px; position: relative; overflow: hidden; padding: 25px 27px; }
.intro::after { position: absolute; content: ""; left: 0; top: 0; width: 3px; height: 100%; background: linear-gradient(transparent, var(--mint), transparent); opacity: .8; }
.tiny-square { display: inline-block; width: 5px; height: 5px; margin-right: 7px; background: var(--mint); vertical-align: 1px; }
.intro h1 { position: relative; z-index: 1; margin: 17px 0 8px; font-size: clamp(22px, 2.1vw, 30px); font-weight: 500; letter-spacing: .04em; }
.intro h1 span { color: var(--mint); }
.intro p { position: relative; z-index: 1; max-width: 475px; margin: 0; color: #8ca3a3; font-size: 12px; line-height: 1.9; }
.intro-orbit { position: absolute; width: 185px; height: 185px; right: 72px; top: 5px; display: grid; place-items: center; opacity: .66; }
.orbit-ring { position: absolute; border: 1px solid rgba(88, 211, 191, .22); border-radius: 50%; }
.ring-one { width: 145px; height: 145px; animation: orbit 17s linear infinite; }
.ring-one::before, .ring-two::before { position: absolute; content: ""; width: 4px; height: 4px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 10px var(--mint); }
.ring-one::before { left: 22px; top: 20px; }
.ring-two { width: 110px; height: 110px; border-style: dashed; animation: orbit 23s linear infinite reverse; }
.ring-two::before { right: 4px; bottom: 28px; }
.orbit-core { display: grid; place-items: center; width: 69px; height: 69px; border: 1px solid var(--line-strong); border-radius: 50%; color: var(--mint); font: 11px var(--mono); box-shadow: 0 0 34px rgba(74, 204, 179, .12), inset 0 0 22px rgba(74, 204, 179, .1); }
.orbit-core span { color: #8da5a4; font: 7px var(--sans); }
.orbit-point { position: absolute; top: 36px; right: 31px; width: 5px; height: 5px; border-radius: 50%; background: #b2ede0; box-shadow: 0 0 10px 2px rgba(103, 230, 205, .7); }
.intro-index { position: absolute; right: 19px; top: 17px; color: rgba(126, 168, 166, .58); font: 600 12px var(--mono); line-height: 1.4; text-align: right; }
.intro-index span { color: var(--mint); }
.intro-index small { color: #637d7e; font: 7px var(--mono); letter-spacing: .04em; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 11px 0; }
.metric { min-height: 82px; display: grid; grid-template-columns: 1fr auto; align-content: center; gap: 5px; padding: 10px 14px; }
.metric > span { color: #849c9b; font-size: 10px; }
.metric strong { grid-column: 1; font: 500 18px var(--mono); color: var(--cyan); }
.metric small { grid-column: 2; grid-row: 2; align-self: end; color: #557174; font: 7px var(--mono); }
.metric .ready { color: var(--mint); font-size: 13px; }
.question-browser { margin-bottom: 11px; padding: 14px 16px 12px; }
.question-browser-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.question-browser-head h2 { margin: 5px 0 0; font-size: 13px; font-weight: 500; }
.question-browser-count { color: #8ab9b2; font: 9px var(--mono); white-space: nowrap; }
.question-browser-note { margin: 7px 0 10px; color: #718b8c; font-size: 10px; }
.question-browser-list { max-height: 250px; overflow-y: auto; padding-right: 4px; scrollbar-color: #335656 transparent; scrollbar-width: thin; }
.question-category + .question-category { margin-top: 11px; padding-top: 9px; border-top: 1px solid rgba(106, 162, 160, .12); }
.question-category h3 { display: flex; align-items: center; gap: 7px; margin: 0 0 6px; color: #8fb3af; font-size: 10px; font-weight: 500; }
.question-category h3 span { color: #577779; font: 8px var(--mono); }
.question-category-items { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 5px; }
.question-browser-item { min-width: 0; padding: 7px 9px; border: 1px solid rgba(93, 187, 173, .14); background: rgba(83, 168, 157, .035); color: #9bb5b1; cursor: pointer; text-align: left; font-size: 10px; line-height: 1.55; transition: .15s ease; }
.question-browser-item:hover, .question-browser-item:focus-visible { border-color: rgba(99, 213, 191, .55); background: rgba(83, 168, 157, .1); color: #d2f5ec; outline: none; }
.question-browser-empty { color: var(--muted); font-size: 10px; }
.chat { min-height: 720px; display: flex; flex-direction: column; padding: 18px 20px 12px; }
.chat-head { display: flex; justify-content: space-between; align-items: center; padding-bottom: 13px; border-bottom: 1px solid var(--line); }
.assistant-status { margin-left: auto; padding: 5px 7px; border: 1px solid rgba(121, 183, 181, .17); color: #829b9a; font: 8px var(--mono); white-space: nowrap; }
.assistant-status.ai-ready { border-color: rgba(99, 213, 191, .3); color: var(--mint); }
.chat-head h2 { margin: 5px 0 0; font-size: 14px; font-weight: 500; letter-spacing: .05em; }
.chat-code { margin-left: 7px; color: #698587; font: 9px var(--mono); }
.text-button { border: 0; background: transparent; color: #799495; cursor: pointer; font-size: 10px; }
.text-button:hover { color: var(--mint); }
.text-button span { padding-left: 4px; font-size: 15px; }
.messages { flex: 1; max-height: 600px; min-height: 500px; overflow-y: auto; padding: 15px 2px; scrollbar-color: #335656 transparent; scrollbar-width: thin; }
.message { display: flex; gap: 10px; margin: 1px 0 17px; animation: rise .28s ease both; }
.avatar { flex: 0 0 28px; width: 28px; height: 28px; display: grid; place-items: center; border: 1px solid rgba(99, 213, 191, .35); color: var(--mint); background: rgba(67, 165, 151, .08); font: 8px var(--mono); }
.avatar span { margin-left: -5px; color: #d1e8e3; }
.user-message .avatar { color: #879d9e; border-color: var(--line); font-size: 7px; }
.message-body { flex: 1; min-width: 0; }
.message-meta { display: flex; align-items: center; gap: 10px; margin: 2px 0 7px; color: #8cb0ab; font: 8px var(--mono); letter-spacing: .08em; }
.message-meta time { color: #60777a; font-size: 8px; letter-spacing: 0; }
.user-message .message-meta { color: #839496; }
.bubble { width: fit-content; max-width: 100%; padding: 10px 12px; border: 1px solid rgba(91, 154, 150, .17); background: rgba(26, 47, 49, .56); }
.bubble p { margin: 0; color: #b3c7c4; font-size: 11px; line-height: 1.85; white-space: pre-line; }
.user-message .bubble { margin-left: auto; border-color: rgba(95, 204, 187, .2); background: rgba(46, 113, 106, .17); }
.user-message .message-body { display: flex; flex-direction: column; align-items: flex-end; }
.user-message .message-meta { align-self: flex-end; }
.answer-source { margin-top: 9px; padding-top: 7px; border-top: 1px solid var(--line); color: #698789; font: 8px var(--mono); line-height: 1.7; }
.answer-source a { color: #a2cfc5; text-decoration: underline; overflow-wrap: anywhere; }
.answer-source a:hover { color: #d7eee7; }
.welcome-bubble { max-width: 97%; }
.suggestions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.suggestion-chip { padding: 6px 8px; border: 1px solid rgba(93, 187, 173, .22); background: rgba(83, 168, 157, .06); color: #9dcac1; cursor: pointer; font-size: 9px; transition: .15s ease; }
.suggestion-chip:hover { border-color: var(--mint); color: #d2f5ec; }
.composer { display: flex; align-items: center; gap: 11px; min-height: 48px; padding: 5px 6px 5px 11px; border: 1px solid rgba(103, 184, 176, .25); background: rgba(3, 12, 15, .7); }
.composer:focus-within { border-color: rgba(99, 213, 191, .62); box-shadow: 0 0 16px rgba(63, 179, 164, .07); }
.composer-prefix { color: var(--mint); font: 11px var(--mono); }
.composer input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; color: #d5e5e1; font-size: 11px; }
.composer input::placeholder { color: #607779; }
.composer button { min-width: 74px; height: 34px; border: 1px solid rgba(95, 215, 191, .4); background: rgba(64, 162, 148, .16); color: #c4f0e5; cursor: pointer; font-size: 10px; transition: .2s ease; }
.composer button:hover { border-color: var(--mint); background: rgba(64, 162, 148, .3); }
.composer button:disabled { opacity: .55; cursor: wait; }
.composer button span { margin-left: 5px; color: var(--mint); }
.chat-foot { display: flex; justify-content: space-between; gap: 8px; padding-top: 8px; color: #587173; font: 7px var(--mono); }
.clear-notice { padding: 26px 0; color: #779191; text-align: center; font-size: 11px; }
.right-rail { grid-area: right; display: flex; flex-direction: column; gap: 12px; min-height: 0; }
.side-card { padding: 17px 14px; }
.side-card h2 { margin: 17px 0 11px; }
.ai-info-card p { margin: 10px 0 12px; color: #819b9a; font-size: 10px; line-height: 1.8; }
.ai-info-card a { display: block; width: fit-content; padding: 7px 8px; border: 1px solid rgba(97, 202, 185, .25); color: #a2cfc5; font: 9px var(--mono); transition: .2s ease; }
.right-rail .ai-info-card { flex: 1 1 0; }
.ai-info-card a:hover { border-color: var(--mint); color: var(--mint); }
.ai-lock { color: #91aaa8; font: 8px var(--mono); }
.side-signal { font-size: 8px; }
.side-signal.offline { color: #df8d73; text-shadow: 0 0 9px rgba(223, 141, 115, .6); }
.network-card { flex: 1 1 0; padding-bottom: 13px; }
.network-host { display: grid; gap: 4px; padding: 10px 0 12px; border-top: 1px solid rgba(106, 162, 160, .12); }
.network-host > span, .network-label { color: #829b9a; font-size: 9px; }
.network-host strong { overflow-wrap: anywhere; color: var(--mint); font: 500 15px var(--mono); }
.network-host small { overflow-wrap: anywhere; color: #5f7c7c; font: 8px var(--mono); }
.network-links { display: grid; gap: 6px; }
.network-label { padding-top: 7px; border-top: 1px solid rgba(106, 162, 160, .1); }
.network-url-list { display: grid; gap: 3px; }
.network-help { margin: 2px 0 0; color: #587173; font-size: 8px; line-height: 1.6; }
.network-url-row { display: flex; align-items: center; gap: 5px; min-width: 0; }
.network-url { min-width: 0; flex: 1; overflow-wrap: anywhere; color: #9fc6be; font: 8px var(--mono); line-height: 1.7; transition: color .15s ease; }
.network-url:hover { color: var(--mint); text-decoration: underline; }
.copy-url-button { flex: 0 0 auto; padding: 2px 5px; border: 1px solid rgba(99, 213, 191, .18); background: rgba(83, 168, 157, .045); color: #83aaa4; cursor: pointer; font-size: 8px; line-height: 1.4; }
.copy-url-button:hover, .copy-url-button:focus-visible { border-color: var(--line-strong); color: var(--mint); outline: none; }
.copy-url-button.copied { color: var(--mint); }
.copy-url-button.copy-failed { border-color: rgba(223, 141, 115, .4); color: #df8d73; }
.network-updated { margin-top: 9px; color: #587173; font: 7px var(--mono); }
.campus-link-list { display: grid; gap: 8px; }
.campus-links-card { flex: 1.6 1 0; }
.campus-link-item { display: flex; align-items: center; justify-content: space-between; gap: 7px; padding-top: 8px; border-top: 1px solid rgba(106, 162, 160, .12); }
.campus-link-copy { display: grid; gap: 3px; min-width: 0; }
.campus-link-copy a { overflow-wrap: anywhere; color: #a2cfc5; font-size: 10px; line-height: 1.5; }
.campus-link-copy a:hover { color: var(--mint); text-decoration: underline; }
.campus-link-copy span { color: #718b8c; font-size: 8px; line-height: 1.5; }
.campus-link-item .copy-url-button { font-family: var(--sans); }
.campus-link-note { margin: 11px 0 0; color: #718b8c; font-size: 8px; line-height: 1.8; }
.campus-article-link { display: inline-block; margin-top: 9px; color: #89b7ad; font-size: 8px; }
.campus-article-link:hover { color: var(--mint); }
.campus-article-link span { color: var(--mint); margin-left: 3px; }
.side-foot { display: flex; justify-content: space-between; align-items: center; margin-top: auto; padding: 8px 3px; color: #526b6e; font: 8px var(--mono); }
.bars { display: flex; gap: 3px; align-items: end; height: 12px; }
.bars i { width: 3px; background: var(--mint); opacity: .6; animation: equalize .8s infinite alternate; }
.bars i:nth-child(1), .bars i:nth-child(5) { height: 5px; }
.bars i:nth-child(2), .bars i:nth-child(4) { height: 9px; animation-delay: .2s; }
.bars i:nth-child(3) { height: 12px; animation-delay: .4s; }
.page-footer { display: flex; justify-content: space-between; gap: 12px; padding: 15px 0 18px; color: #5c7375; font: 8px var(--mono); letter-spacing: .04em; }
.page-footer b { color: var(--mint); font-weight: 400; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
@keyframes blink { 50% { opacity: .3; } }
@keyframes orbit { to { transform: rotate(360deg); } }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
@keyframes equalize { to { height: 3px; opacity: .3; } }

@media (min-width: 1500px) { .shell { padding-right: 62px; padding-left: 62px; } .layout { grid-template-columns: 235px minmax(480px, 1fr) 260px; gap: 22px; } }
@media (max-width: 1100px) {
  .shell { padding: 0 24px; }
  .layout { grid-template-columns: minmax(0, 1fr) minmax(280px, .72fr); grid-template-areas: "left left" "main right"; }
  .left-rail { min-height: auto; }
  .intro-orbit { right: 30px; opacity: .38; }
}
@media (max-width: 720px) {
  .shell { padding: 0 14px; }
  .topbar { height: 66px; }
  .brand { min-width: 0; }
  .brand-mark { width: 32px; height: 32px; }
  .brand-copy small { font-size: 7px; }
  .top-status { display: none; }
  .official-link { font-size: 10px; padding: 8px; }
  .layout { grid-template-columns: 1fr; grid-template-areas: "left" "main" "right"; gap: 12px; padding-top: 14px; }
  .left-rail { min-height: auto; padding: 12px; }
  .rail-heading, .left-rail h2, .rail-note, .rail-footer { display: none; }
  .category-list { display: flex; gap: 5px; overflow-x: auto; }
  .category-button { width: auto; flex: 0 0 auto; min-height: 38px; gap: 6px; padding: 0 8px; font-size: 12px; }
  .category-marker { font-size: 8px; }
  .category-count { margin-left: 0; font-size: 7px; }
  .category-arrow { display: none; }
  .admin-access-row { flex: 0 0 auto; margin: 8px 0 0; }
  .admin-access-link { display: flex; align-items: center; padding: 8px; }
  .admin-access-url { max-width: 190px; font-size: 7px; }
  .intro { height: 173px; padding: 20px 17px; }
  .intro h1 { margin-top: 20px; font-size: 23px; }
  .intro p { max-width: 76%; font-size: 10px; }
  .intro-orbit { width: 120px; height: 120px; right: -3px; top: 26px; opacity: .26; }
  .ring-one { width: 103px; height: 103px; }
  .ring-two { width: 80px; height: 80px; }
  .orbit-core { width: 54px; height: 54px; }
  .intro-index { top: 10px; right: 10px; font-size: 9px; }
  .metrics { gap: 6px; margin: 8px 0; }
  .metric { min-height: 70px; padding: 8px; }
  .metric > span { font-size: 9px; }
  .metric strong { font-size: 15px; }
  .metric small { font-size: 6px; }
  .question-browser { padding: 12px; }
  .question-browser-list { max-height: 220px; }
  .question-category-items { grid-template-columns: 1fr; }
  .chat { min-height: 660px; padding: 14px 12px 10px; }
  .chat-code { display: block; margin: 4px 0 0; font-size: 7px; }
  .messages { max-height: 540px; min-height: 440px; }
  .chat-foot { font-size: 6px; }
  .right-rail { grid-column: auto; }
  .side-card { padding: 14px; }
  .page-footer { flex-direction: column; padding-bottom: 15px; font-size: 7px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

.music-card h2 { margin: 15px 0 12px; }
.music-track-label, .music-volume-label { color: #8ca3a3; font-size: 10px; }
.music-track-select { width: 100%; min-height: 36px; border: 1px solid rgba(103, 184, 176, .25); padding: 8px; background: rgba(3, 12, 15, .7); color: #d5e5e1; font-size: 11px; }
.music-track-select:focus { border-color: var(--mint); outline: 0; }
.music-player-controls { display: flex; align-items: center; gap: 8px; margin-top: 10px; }
.music-toggle { min-height: 32px; padding: 0 12px; border: 1px solid rgba(95, 215, 191, .4); background: rgba(64, 162, 148, .16); color: #c4f0e5; cursor: pointer; font-size: 10px; }
.music-toggle:disabled { cursor: not-allowed; opacity: .5; }
.music-player-controls input[type="range"] { width: 72px; accent-color: var(--mint); }
.music-player-status { min-height: 30px; margin: 8px 0 0; color: #82999a; font-size: 9px; line-height: 1.7; }