/* 智能体训练平台 · 通用样式（无外部CDN依赖）· 大字号清爽版 */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --blue: #2563eb; --blue-l: #dbeafe; --violet: #7c3aed; --violet-l: #ede9fe;
  --green: #16a34a; --green-l: #dcfce7; --red: #dc2626; --red-l: #fee2e2;
  --orange: #ea580c; --orange-l: #ffedd5;
  --ink: #1e293b; --mut: #64748b; --line: #e2e8f0; --bg: #f4f7fb; --card: #ffffff;
}
html, body { font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; background: var(--bg); color: var(--ink); font-size: 17px; line-height: 1.6; }
.wrap { max-width: 880px; margin: 0 auto; padding: 22px 20px 60px; }
.wrap-wide { max-width: 1160px; margin: 0 auto; padding: 16px 18px 48px; }

/* 页面任务色标识（每关一个主色，呼应学习地图） */
.pg-l1 .card { border-left: 7px solid var(--blue); }
.pg-l2 .card { border-left: 7px solid var(--violet); }
.pg-l3 .card { border-left: 7px solid var(--orange); }
.pg-ev .card { border-left: 7px solid var(--green); }

/* 顶栏 */
.topbar { position: sticky; top: 0; z-index: 10; background: linear-gradient(100deg, #1d4ed8, #6d28d9); color: #fff; padding: 12px 18px; display: flex; align-items: center; gap: 12px; box-shadow: 0 2px 10px rgba(29,78,216,.25); }
.topbar .brand { font-weight: 700; font-size: 18px; white-space: nowrap; }
.topbar .name { margin-left: auto; font-size: 15px; opacity: .92; }
.topbar a.navlink { color: #fff; text-decoration: none; font-size: 15px; padding: 6px 14px; border-radius: 18px; background: rgba(255,255,255,.16); white-space: nowrap; transition: background .15s; }
.topbar a.navlink:hover { background: rgba(255,255,255,.28); }
.topbar a.navlink.on { background: #fff; color: var(--blue); font-weight: 700; }

/* 卡片 */
.card { background: var(--card); border-radius: 18px; padding: 26px 30px; margin-top: 22px; box-shadow: 0 2px 12px rgba(15,23,42,.08); }
.card h2 { font-size: 22px; margin-bottom: 8px; letter-spacing: .3px; line-height: 1.5; }
.card .sub { color: var(--mut); font-size: 15.5px; margin-bottom: 16px; line-height: 1.8; }
.card p { line-height: 1.85; }
.card > p[style*="font-weight:600"], .card p b { line-height: 1.8; }

/* 按钮 */
.btn { display: inline-block; border: 0; border-radius: 12px; padding: 12px 24px; font-size: 17px; cursor: pointer; background: var(--blue); color: #fff; font-weight: 600; transition: transform .1s, opacity .15s; font-family: inherit; }
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.big { width: 100%; padding: 16px; font-size: 19px; }
.btn.ghost { background: #eef2ff; color: var(--blue); }
.btn.green { background: var(--green); }
.btn.red { background: var(--red); }
.btn.violet { background: var(--violet); }
.btn.sm { padding: 7px 14px; font-size: 14.5px; border-radius: 9px; }

/* 徽标 */
.tag { display: inline-block; padding: 3px 12px; border-radius: 12px; font-size: 14px; font-weight: 600; }
.tag.ok { background: var(--green-l); color: var(--green); }
.tag.no { background: #f1f5f9; color: var(--mut); }
.tag.doing { background: var(--orange-l); color: var(--orange); }

/* 登录页 */
.hero { text-align: center; padding: 48px 10px 8px; }
.hero .logo { font-size: 56px; }
.hero h1 { font-size: 28px; margin: 10px 0 8px; letter-spacing: 1px; }
.hero p { color: var(--mut); font-size: 16.5px; line-height: 1.8; }
.name-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 16px; }
.name-grid button { padding: 18px 4px; border-radius: 14px; border: 2px solid var(--line); background: #fff; font-size: 18px; cursor: pointer; font-weight: 600; color: var(--ink); transition: all .15s; font-family: inherit; }
.name-grid button:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-l); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(37,99,235,.18); }
@media (max-width: 520px) { .name-grid { grid-template-columns: repeat(3, 1fr); } }

/* 课程地图 */
.map { display: grid; gap: 14px; margin-top: 16px; }
.stage { display: flex; align-items: center; gap: 16px; background: #fff; border-radius: 16px; padding: 20px; box-shadow: 0 2px 10px rgba(15,23,42,.07); text-decoration: none; color: var(--ink); border-left: 7px solid var(--line); transition: transform .15s, box-shadow .15s; }
.stage:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(15,23,42,.12); }
.stage .num { width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: 800; color: #fff; flex: none; }
.stage.s1 { border-left-color: var(--blue); } .stage.s1 .num { background: var(--blue); }
.stage.s2 { border-left-color: var(--violet); } .stage.s2 .num { background: var(--violet); }
.stage.s3 { border-left-color: var(--orange); } .stage.s3 .num { background: var(--orange); }
.stage.lab { border-left-color: #0ea5e9; } .stage.lab .num { background: #0ea5e9; }
.stage .tt { font-weight: 700; font-size: 19px; }
.stage .dd { color: var(--mut); font-size: 15px; margin-top: 3px; }
.stage .st { margin-left: auto; flex: none; }

/* 词频条形图 */
.bars { margin-top: 12px; }
.bar-row { display: flex; align-items: center; gap: 10px; margin: 7px 0; font-size: 16.5px; }
.bar-row .w { width: 96px; text-align: right; font-weight: 600; flex: none; }
.bar-row .track { flex: 1; background: #eef2f7; border-radius: 8px; height: 26px; overflow: hidden; }
.bar-row .fill { height: 100%; background: linear-gradient(90deg, var(--blue), var(--violet)); border-radius: 8px; transition: width .5s; }
.bar-row .n { width: 40px; color: var(--mut); font-size: 14px; flex: none; }

/* 语料选择 */
.corpus { border: 2px solid var(--line); border-radius: 14px; padding: 14px 18px; margin: 10px 0; cursor: pointer; transition: all .15s; }
.corpus:hover { border-color: #94a3b8; }
.corpus.on { border-color: var(--blue); background: var(--blue-l); }
.corpus .t { font-weight: 700; font-size: 17px; }
.corpus .d { color: var(--mut); font-size: 14.5px; margin-top: 4px; }

/* 测验选项 */
.opts { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px; }
.opts button { padding: 18px; border-radius: 14px; border: 2px solid var(--line); background: #fff; font-size: 17.5px; cursor: pointer; transition: all .15s; font-family: inherit; line-height: 1.7; }
.opts button:hover { border-color: var(--blue); }
.opts button.right { border-color: var(--green); background: var(--green-l); color: var(--green); font-weight: 700; }
.opts button.wrong { border-color: var(--red); background: var(--red-l); color: var(--red); }
.opts button:disabled { cursor: default; }

/* 进度条 */
.prog { height: 14px; background: #eef2f7; border-radius: 8px; overflow: hidden; margin: 10px 0; }
.prog > div { height: 100%; background: linear-gradient(90deg, var(--violet), var(--blue)); border-radius: 8px; transition: width .3s; }

/* 标注卡 */
.label-card { background: #fff; border: 2px solid var(--line); border-radius: 18px; padding: 30px 24px; text-align: center; }
.label-card .sent { font-size: 20px; line-height: 1.85; margin: 14px 0 22px; }
.label-card .btns { display: flex; gap: 14px; justify-content: center; }
.label-card .btns .btn { flex: 1; max-width: 180px; padding: 16px; font-size: 18px; }
.btn.good { background: var(--green); }
.btn.bad { background: var(--red); }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.chip { background: var(--violet-l); color: var(--violet); padding: 6px 15px; border-radius: 12px; font-size: 15px; font-weight: 600; }

/* 聊天 */
.chat-box { height: 46vh; overflow-y: auto; background: #f8fafc; border: 1px solid var(--line); border-radius: 14px; padding: 14px; display: flex; flex-direction: column; gap: 12px; }
.msg { max-width: 88%; padding: 12px 16px; border-radius: 16px; font-size: 16.5px; line-height: 1.7; white-space: pre-wrap; word-break: break-word; }
.msg.user { align-self: flex-end; background: var(--blue); color: #fff; border-bottom-right-radius: 4px; }
.msg.bot { align-self: flex-start; background: #fff; border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.msg.bot.offline { border-color: var(--orange); background: var(--orange-l); }
.chat-input { display: flex; gap: 10px; margin-top: 12px; }
.chat-input textarea { flex: 1; resize: none; border: 2px solid var(--line); border-radius: 12px; padding: 12px 14px; font-size: 17px; font-family: inherit; height: 56px; }
.chat-input textarea:focus { outline: 0; border-color: var(--blue); }
.chat-input .btn { font-size: 17px; padding: 0 26px; }
.sugg { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.sugg button { background: #eef2ff; color: var(--blue); border: 0; border-radius: 18px; padding: 9px 18px; font-size: 15px; cursor: pointer; transition: background .15s; font-family: inherit; }
.sugg button:hover { background: var(--blue-l); }
.quota { font-size: 15px; color: var(--mut); margin-top: 10px; text-align: center; }
.spin { display: inline-block; width: 15px; height: 15px; border: 2px solid rgba(255,255,255,.4); border-top-color: #fff; border-radius: 50%; animation: sp 1s linear infinite; vertical-align: -2px; }
@keyframes sp { to { transform: rotate(360deg); } }

/* 教师后台 */
.tabs { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.tabs button { border: 0; padding: 11px 22px; border-radius: 12px 12px 0 0; cursor: pointer; background: #e2e8f0; font-size: 16px; font-weight: 600; color: var(--mut); font-family: inherit; }
.tabs button.on { background: #fff; color: var(--blue); }
table.grid { width: 100%; border-collapse: collapse; background: #fff; border-radius: 14px; overflow: hidden; font-size: 15.5px; box-shadow: 0 2px 10px rgba(15,23,42,.07); }
table.grid th, table.grid td { padding: 12px 10px; text-align: center; border-bottom: 1px solid #f1f5f9; }
table.grid th { background: #f8fafc; color: var(--mut); font-weight: 600; font-size: 14.5px; }
table.grid tr:last-child td { border-bottom: 0; }
.pill { display: inline-block; min-width: 58px; padding: 4px 10px; border-radius: 12px; font-size: 14px; font-weight: 700; }
.pill.ok { background: var(--green-l); color: var(--green); }
.pill.no { background: #f1f5f9; color: #94a3b8; }
.pill.mid { background: var(--orange-l); color: var(--orange); }
.toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 12px 0; }
.toolbar input, .toolbar select { border: 2px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: 16px; font-family: inherit; }
.setrow { display: flex; gap: 12px; align-items: center; margin: 14px 0; flex-wrap: wrap; }
.setrow label { width: 150px; font-weight: 600; font-size: 16px; flex: none; }
.setrow input { flex: 1; min-width: 200px; border: 2px solid var(--line); border-radius: 10px; padding: 11px 13px; font-size: 16px; font-family: inherit; }
.big-url { background: #fff; border-radius: 14px; padding: 16px 18px; text-align: center; box-shadow: 0 2px 10px rgba(15,23,42,.07); }
.big-url .u { font-size: 23px; font-weight: 800; color: var(--blue); letter-spacing: .5px; }
.flex2 { display: flex; gap: 16px; align-items: flex-start; flex-wrap: wrap; }
.flex2 > div { flex: 1; min-width: 260px; }
.notice { background: var(--red-l); color: var(--red); border-radius: 12px; padding: 12px 16px; font-size: 16px; margin-top: 12px; display: none; }
.hint { color: var(--mut); font-size: 14.5px; line-height: 1.7; }
.insight { background: linear-gradient(120deg, var(--blue-l), var(--violet-l)); border-radius: 14px; padding: 18px 22px; font-size: 16.5px; line-height: 2.0; margin-top: 16px; }
.stepdot { display: inline-flex; width: 26px; height: 26px; border-radius: 50%; background: var(--violet); color: #fff; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; margin-right: 8px; }
.test-item { border: 2px solid var(--line); border-radius: 16px; padding: 22px; margin: 14px 0; }
.test-item .res { margin-top: 12px; font-size: 16px; }
.kv { display: flex; gap: 8px; align-items: center; margin-top: 8px; font-size: 16px; }

/* ===== 三关递进条（每关页顶） ===== */
.stepsbar { display: flex; align-items: stretch; gap: 8px; max-width: 880px; margin: 18px auto 0; padding: 0 20px; }
.stepsbar .sb { flex: 1; background: #fff; border: 2px solid var(--line); border-radius: 14px; padding: 11px 10px; text-align: center; transition: all .2s; box-shadow: 0 1px 6px rgba(15,23,42,.05); }
.stepsbar .sb b { display: block; font-size: 16px; }
.stepsbar .sb span { display: block; font-size: 12.5px; color: var(--mut); margin-top: 3px; line-height: 1.4; }
.stepsbar .sb.on { border-color: var(--blue); background: var(--blue-l); box-shadow: 0 3px 14px rgba(37,99,235,.22); }
.stepsbar .sb.on b { color: var(--blue); }
.stepsbar .sb.done { border-color: var(--green); background: var(--green-l); }
.stepsbar .sb.done b { color: var(--green); }
.stepsbar .sb:not(.on) { cursor: pointer; }
.stepsbar .sb:not(.on):hover { transform: translateY(-3px); box-shadow: 0 6px 16px rgba(15,23,42,.14); border-color: var(--blue); }
.stepsbar .sb-arrow { align-self: center; color: #94a3b8; font-size: 18px; font-weight: 700; flex: none; }
@media (max-width: 560px) { .stepsbar { flex-direction: column; } .stepsbar .sb-arrow { transform: rotate(90deg); text-align: center; } }

/* ===== 原文展示（关①） ===== */
.src-card { background: #fbfcfe; border: 2px dashed #c7d2fe; border-radius: 14px; padding: 16px 18px; margin-top: 12px; }
.src-card .src-t { font-weight: 700; font-size: 16px; margin-bottom: 8px; color: var(--violet); }
.src-card .src-body { font-size: 16.5px; line-height: 2.0; color: #334155; text-indent: 2em; }
.src-card .fold { margin-top: 6px; text-align: center; }
.src-card .fold button { border: 0; background: none; color: var(--blue); font-size: 14.5px; cursor: pointer; font-family: inherit; }

/* ===== 知识学习卡 ===== */
.know-card { border: 2px solid var(--line); border-radius: 16px; margin-top: 14px; overflow: hidden; background: #fff; }
.know-card .kc-head { display: flex; align-items: center; gap: 12px; padding: 16px 18px; cursor: pointer; }
.know-card .kc-head .ico { font-size: 26px; flex: none; }
.know-card .kc-head .kt { font-weight: 700; font-size: 18px; }
.know-card .kc-head .kd { color: var(--mut); font-size: 14px; margin-top: 2px; }
.know-card .kc-head .arr { margin-left: auto; color: #94a3b8; font-size: 18px; transition: transform .2s; flex: none; }
.know-card.open .kc-head .arr { transform: rotate(90deg); }
.know-card .kc-body { display: none; padding: 4px 22px 18px; border-top: 1px dashed var(--line); font-size: 16.5px; line-height: 2.0; }
.know-card.open .kc-body { display: block; }
.know-card .kc-body .big-word { display: inline-block; background: var(--blue-l); color: var(--blue); font-weight: 700; padding: 0 8px; border-radius: 6px; margin: 0 2px; }
.know-card .kc-body ul { padding-left: 22px; margin: 8px 0; }
.know-card .kc-body li { margin: 6px 0; }
.flow-chain { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 10px 0; }
.flow-chain .fc { background: var(--violet-l); color: var(--violet); font-weight: 700; padding: 8px 14px; border-radius: 10px; font-size: 15.5px; }
.flow-chain .fa { color: #94a3b8; font-weight: 700; }

/* ===== 评价测评 ===== */
.quiz-item { border: 2px solid var(--line); border-radius: 16px; padding: 20px 22px; margin: 16px 0; }
.quiz-item .qt { font-weight: 700; font-size: 17.5px; line-height: 1.75; margin-bottom: 12px; }
.quiz-item .qt .qn { color: var(--violet); margin-right: 6px; }
.qopt { display: block; width: 100%; text-align: left; border: 2px solid var(--line); background: #fff; border-radius: 12px; padding: 13px 16px; font-size: 16px; margin: 9px 0; cursor: pointer; font-family: inherit; transition: all .15s; }
.qopt:hover { border-color: var(--blue); }
.qopt.sel { border-color: var(--blue); background: var(--blue-l); font-weight: 700; color: var(--blue); }
.qopt.right { border-color: var(--green); background: var(--green-l); font-weight: 700; color: var(--green); }
.qopt.wrong { border-color: var(--red); background: var(--red-l); color: var(--red); }
.qexp { display: none; background: #f0f9ff; border-left: 4px solid var(--blue); border-radius: 8px; padding: 10px 14px; font-size: 15px; line-height: 1.8; margin-top: 10px; color: #075985; }
.self-row { display: flex; align-items: center; gap: 10px; padding: 13px 0; border-bottom: 1px dashed var(--line); flex-wrap: wrap; }
.self-row .sl { flex: 1; min-width: 220px; font-size: 16.5px; }
.self-row button { border: 2px solid var(--line); background: #fff; border-radius: 10px; padding: 8px 16px; font-size: 15px; cursor: pointer; font-family: inherit; }
.self-row button.sel { border-color: var(--violet); background: var(--violet-l); color: var(--violet); font-weight: 700; }
.stars { display: flex; gap: 6px; }
.stars button { border: 0; background: none; font-size: 30px; cursor: pointer; color: #cbd5e1; transition: transform .1s; }
.stars button.on { color: #f59e0b; }
.stars button:hover { transform: scale(1.15); }
.score-big { text-align: center; font-size: 20px; padding: 18px; }
.score-big b { font-size: 52px; color: var(--blue); }
.tagpick { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.tagpick button { border: 2px solid var(--line); background: #fff; border-radius: 20px; padding: 10px 18px; font-size: 16px; cursor: pointer; font-family: inherit; }
.tagpick button.sel { border-color: var(--green); background: var(--green-l); color: var(--green); font-weight: 700; }
.fb-input { width: 100%; border: 2px solid var(--line); border-radius: 12px; padding: 12px 14px; font-size: 16.5px; font-family: inherit; resize: none; }
.fb-input:focus { outline: 0; border-color: var(--blue); }

/* ===== 语料管理（教师） ===== */
.cor-item { border: 2px solid var(--line); border-radius: 14px; padding: 14px 18px; margin: 12px 0; background: #fff; }
.cor-item .ct { font-weight: 700; font-size: 17px; }
.cor-item .cd { color: var(--mut); font-size: 14px; margin: 4px 0 8px; }
.cor-item .cbody { font-size: 15px; color: #334155; line-height: 1.9; background: #f8fafc; border-radius: 10px; padding: 10px 14px; max-height: 110px; overflow: hidden; position: relative; }
.cor-item .cbody::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 40px; background: linear-gradient(transparent, #f8fafc); }
.cor-edit { border: 2px solid var(--blue-l); border-radius: 14px; padding: 14px 18px; margin: 12px 0; background: #f8fbff; }
.cor-edit input, .cor-edit textarea { width: 100%; border: 2px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: 15.5px; font-family: inherit; margin: 6px 0; }
.cor-edit input:focus, .cor-edit textarea:focus { outline: 0; border-color: var(--blue); }

/* ============ 任务一 · 人工分词挑战 ============ */
.seg-sent { background: #fffbeb; border: 2px solid #fde68a; border-radius: 16px; padding: 20px 22px; font-size: 19px; font-weight: 600; line-height: 2.1; letter-spacing: .06em; color: #78350f; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { border: 2px solid var(--line); background: #fff; border-radius: 8px; padding: 6px 12px; font-size: 16.5px; font-weight: 600; color: var(--ink); }
.chip.ok { background: #ecfdf5; border-color: #34d399; color: #047857; }
.chip.extra { background: #fff7ed; border-color: #fdba74; color: #c2410c; }
.chip.miss { background: #fef2f2; border-color: #f87171; color: #b91c1c; }
.seg-note { font-size: 14px; color: var(--mut); font-weight: 400; margin-left: 6px; }
.seg-note .g { color: #047857; } .seg-note .o { color: #c2410c; } .seg-note .r { color: #b91c1c; }

/* 动手分词：点字缝插竖线 */
.seg-sent { user-select: none; }
.seg-sent .ch { position: relative; }
.seg-sent .gap { display: inline-block; width: 22px; cursor: pointer; position: relative; user-select: none; border-radius: 4px; }
.seg-sent .gap:hover { background: #fef3c7; }
.seg-sent .gap::after { content: ''; position: absolute; left: 50%; margin-left: -1px; top: .18em; bottom: .18em; width: 2px; border-radius: 2px; background: #fcd34d; transition: background .12s, width .12s; }
.seg-sent .gap:hover::after { background: #f59e0b; width: 3px; margin-left: -1.5px; }
.seg-sent .gap.on::after { background: #ef4444; width: 4px; margin-left: -2px; }
.seg-tip { font-size: 14.5px; color: var(--mut); margin-top: 8px; }
/* 打字兜底：万一点击不便，可直接用空格分词 */
.seg-type { margin-top: 12px; background: #f8fafc; border: 2px dashed var(--line); border-radius: 14px; padding: 12px 14px; }
.seg-type input { width: 100%; border: 2px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: 16px; font-family: inherit; }
.seg-type input:focus { outline: 0; border-color: var(--blue); }
.seg-mine { margin-top: 14px; background: #f8fafc; border: 2px dashed var(--line); border-radius: 14px; padding: 12px 14px; min-height: 62px; }
.seg-lab { font-size: 15.5px; font-weight: 700; color: var(--ink); margin: 10px 0 8px; }
.chip.mine { background: #eef2ff; border-color: #a5b4fc; color: #3730a3; }
.seg-btns { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.cmp-row { display: flex; align-items: flex-start; gap: 12px; margin: 10px 0; flex-wrap: wrap; }
.cmp-k { flex: none; width: 128px; font-size: 14.5px; font-weight: 700; padding: 6px 8px; border-radius: 8px; text-align: center; }
.cmp-k.ok { background: #ecfdf5; color: #047857; }
.cmp-k.extra { background: #fff7ed; color: #c2410c; }
.cmp-k.miss { background: #fef2f2; color: #b91c1c; }
.tail-box { margin-top: 16px; background: #f8fafc; border: 2px dashed var(--line); border-radius: 14px; padding: 12px 16px; }
.tail-t { font-size: 16px; font-weight: 700; }
.tail-w { font-size: 15px; color: var(--mut); line-height: 1.9; margin: 6px 0; }
.tail-n { font-size: 14.5px; color: var(--ink); }
.guess-box { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 16px; background: #f5f3ff; border: 2px dashed #c4b5fd; border-radius: 14px; padding: 14px 16px; }
.guess-box label { font-size: 17px; }
.guess-box input:focus { outline: 0; border-color: var(--violet); }

/* ============ 侧边学习卡抽屉 ============ */
#drawerTab { position: fixed; right: 0; top: 38%; z-index: 60; background: linear-gradient(135deg, #7c3aed, #4f46e5); color: #fff; border-radius: 12px 0 0 12px; padding: 14px 9px; font-size: 15px; font-weight: 700; cursor: pointer; box-shadow: -3px 3px 12px rgba(79,70,229,.35); text-align: center; line-height: 1.5; letter-spacing: .1em; user-select: none; }
#drawerTab:hover { padding-right: 14px; }
#learnDrawer { position: fixed; top: 0; right: 0; bottom: 0; width: min(300px, 92vw); z-index: 70; background: var(--bg); box-shadow: -8px 0 30px rgba(15,23,42,.25); transform: translateX(105%); transition: transform .28s ease; overflow-y: auto; padding: 14px 14px 26px; }
#learnDrawer.open { transform: translateX(0); }
#learnDrawer .dr-head { display: flex; align-items: center; justify-content: space-between; background: #fff; border-radius: 14px; padding: 12px 12px; box-shadow: 0 2px 10px rgba(15,23,42,.07); margin-bottom: 6px; }
#learnDrawer .dr-t { font-size: 17px; font-weight: 800; color: var(--violet); }
#learnDrawer .dr-d { font-size: 14px; color: var(--mut); margin-top: 2px; }
#learnDrawer .dr-close { border: 0; background: #f1f5f9; color: var(--ink); width: 36px; height: 36px; border-radius: 10px; font-size: 17px; cursor: pointer; }
#learnDrawer .know-card { margin-top: 12px; }

/* ============ 左侧「观察大模型」抽屉（全站常驻，自动更新） ============ */
#growTab { position: fixed; left: 0; top: 30%; z-index: 60; background: linear-gradient(135deg, #0ea5e9, #0369a1); color: #fff; border-radius: 0 12px 12px 0; padding: 13px 8px; font-size: 14px; font-weight: 700; cursor: pointer; box-shadow: 3px 3px 12px rgba(3,105,161,.35); text-align: center; line-height: 1.45; letter-spacing: .08em; user-select: none; }
#growTab:hover { padding-left: 14px; }
#growDrawer { position: fixed; top: 0; left: 0; bottom: 0; width: min(420px, 94vw); z-index: 70; background: var(--bg); box-shadow: 8px 0 30px rgba(15,23,42,.25); transform: translateX(-105%); transition: transform .28s ease; overflow-y: auto; padding: 14px 14px 26px; }
#growDrawer.open { transform: translateX(0); }
#growDrawer .dr-head { display: flex; align-items: center; justify-content: space-between; background: #fff; border-radius: 14px; padding: 12px; box-shadow: 0 2px 10px rgba(15,23,42,.07); margin-bottom: 10px; }
#growDrawer .dr-t { font-size: 17px; font-weight: 800; color: #0369a1; }
#growDrawer .dr-d { font-size: 13px; color: var(--mut); margin-top: 2px; }
#growDrawer .dr-close { border: 0; background: #f1f5f9; color: var(--ink); width: 36px; height: 36px; border-radius: 10px; font-size: 17px; cursor: pointer; }
.gd-box { background: #0f172a; border-radius: 14px; padding: 6px; margin-bottom: 10px; position: relative; }
#growCanvas { width: 100%; display: block; border-radius: 10px; }
.gd-tip { position: absolute; right: 12px; bottom: 8px; color: #94a3b8; font-size: 12px; }
.gd-status { font-size: 14px; line-height: 1.8; background: #fff; border-radius: 12px; padding: 10px 12px; box-shadow: 0 2px 10px rgba(15,23,42,.07); margin-bottom: 10px; }
.gd-lgd { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 10px; }
.gd-lgd i { width: 11px; height: 11px; border-radius: 50%; display: inline-block; margin-right: 5px; }
.gd-note { font-size: 14.5px; line-height: 1.95; color: var(--mut); background: #fff; border-radius: 12px; padding: 10px 12px; }
.gd-acts { display: flex; gap: 8px; margin-top: 10px; }
.cap { margin-bottom: 10px; }
.cap-h { font-size: 13.5px; font-weight: 700; margin-bottom: 4px; display: flex; justify-content: space-between; }
.cap-h span:last-child { font-weight: 400; color: #64748b; font-size: 12.5px; }
.cap .track { height: 9px; background: #e8edf5; border-radius: 6px; overflow: hidden; }
.cap .fill { height: 100%; border-radius: 6px; transition: width .8s ease; }
.dr-badge { display:inline-block; background:#ecfdf5; color:#047857; border:1.5px solid #34d399; border-radius:20px; padding:6px 16px; font-weight:700; font-size:15px; margin:6px 6px 0 0; }
.dr-badge.o { background:#fff7ed; color:#c2410c; border-color:#fdba74; }
.dr-badge.b { background:#eff6ff; color:#1d4ed8; border-color:#93c5fd; }

/* ============ 观察大模型 · 提问面板美化 ============ */
#growDrawer .dr-head { background: linear-gradient(135deg, #0ea5e9, #6366f1); color: #fff; border: 0; }
#growDrawer .dr-t { color: #fff; }
#growDrawer .dr-d { color: rgba(255,255,255,.88); }
#growDrawer .dr-close { background: rgba(255,255,255,.22); color: #fff; }

.gd-sep { font-size: 14px; font-weight: 800; color: var(--violet); margin: 16px 0 9px; padding: 7px 0 7px 11px; border-left: 4px solid var(--violet); background: var(--violet-l); border-radius: 0 8px 8px 0; }

.cap { background: #fff; border-radius: 12px; padding: 10px 12px; box-shadow: 0 2px 10px rgba(15,23,42,.07); margin-bottom: 10px; }
.cap-h { font-size: 13.5px; font-weight: 700; margin-bottom: 7px; display: flex; justify-content: space-between; align-items: center; }
.cap-h span:last-child { font-weight: 800; color: #0ea5e9; font-size: 15px; }
.cap .track { height: 10px; background: #e8edf5; border-radius: 6px; overflow: hidden; margin-bottom: 7px; }
.cap .fill { height: 100%; border-radius: 6px; background: linear-gradient(90deg, #34d399, #0ea5e9, #6366f1); transition: width .9s ease; }
.cap-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.cap-tags .t { font-size: 12px; background: #f1f5f9; color: #475569; border-radius: 20px; padding: 3px 10px; }

.ask-scope { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--mut); margin-bottom: 9px; }
.ask-sel { border: 1.5px solid var(--line); border-radius: 9px; padding: 5px 8px; font-size: 13px; background: #fff; color: var(--ink); }
.ask-learned { margin-left: auto; font-weight: 700; color: #0369a1; background: #e0f2fe; border-radius: 20px; padding: 3px 11px; font-size: 12.5px; }

.ask-box { display: flex; flex-direction: column; gap: 10px; max-height: 300px; overflow-y: auto; margin-bottom: 10px; padding: 2px; }
.ask-bub { border-radius: 14px; padding: 10px 12px; font-size: 14px; line-height: 1.7; max-width: 100%; box-shadow: 0 1px 4px rgba(15,23,42,.06); }
.ask-bub.user { background: #eef2ff; align-self: flex-end; border: 1px solid #c7d2fe; }
.ask-bub.train { background: linear-gradient(135deg, #fff7ed, #ffedd5); border: 1px solid #fed7aa; }
.ask-bub.real { background: linear-gradient(135deg, #eff6ff, #dbeafe); border: 1px solid #bfdbfe; }
.ask-bub.sys { background: #fef2f2; border: 1px solid #fecaca; color: #b91c1c; font-size: 13px; }
.ask-h { font-size: 12.5px; font-weight: 800; margin-bottom: 4px; }
.ask-bub.train .ask-h { color: #c2410c; }
.ask-bub.real .ask-h { color: #1d4ed8; }
.ask-bub.user .ask-h { color: #4338ca; text-align: right; }
.ask-c { color: var(--ink); white-space: pre-wrap; }
.ask-c mark { background: #fde68a; padding: 0 2px; border-radius: 3px; font-weight: 700; color: #92400e; }
.ask-meta { font-size: 11.5px; color: #94a3b8; margin-top: 5px; }

.ask-in { display: flex; gap: 8px; align-items: flex-end; }
.ask-in textarea { flex: 1; border: 1.5px solid var(--line); border-radius: 12px; padding: 9px 11px; font-size: 14px; resize: none; font-family: inherit; color: var(--ink); }
.ask-in textarea:focus { outline: none; border-color: var(--violet); }
.ask-real { width: 100%; margin-top: 8px; background: linear-gradient(135deg, #1d4ed8, #0ea5e9); color: #fff; border: 0; border-radius: 12px; padding: 11px; font-weight: 700; font-size: 14px; cursor: pointer; box-shadow: 0 4px 14px rgba(29,78,216,.3); }
.ask-real:hover { filter: brightness(1.06); }
/* ---- 演变主线：数据 → 大数据 → 大模型 ---- */
.evo { margin: 10px 12px 0; background: linear-gradient(135deg,#f5f3ff,#eef2ff); border: 1px solid #ddd6fe; border-radius: 14px; padding: 10px 12px; }
.evo-h { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: #6d28d9; font-weight: 700; margin-bottom: 8px; }
.evo-h b { font-size: 12px; color: #fff; background: #7c3aed; padding: 2px 10px; border-radius: 999px; }
.evo-track { display: flex; align-items: center; gap: 4px; margin-bottom: 8px; }
.evo-track .stg { flex: 1; text-align: center; font-size: 11px; padding: 4px 0; border-radius: 8px; background: #fff; color: #94a3b8; border: 1px solid #e2e8f0; }
.evo-track .stg.on { background: #7c3aed; color: #fff; border-color: #7c3aed; }
.evo-track .arw { width: 10px; height: 1px; background: #cbd5e1; flex: none; }
.evo-bars .ebar { display: flex; align-items: center; gap: 6px; margin: 3px 0; font-size: 11px; color: #475569; }
.evo-bars .el { width: 46px; flex: none; }
.evo-bars .etr { flex: 1; height: 8px; background: #fff; border-radius: 999px; overflow: hidden; }
.evo-bars .efl { height: 100%; border-radius: 999px; background: #94a3b8; transition: width .5s; }
.evo-bars .efl.me { background: #a78bfa; }
.evo-bars .efl.group { background: #60a5fa; }
.evo-bars .efl.all { background: linear-gradient(90deg,#34d399,#3b82f6,#8b5cf6); }
.evo-bars .ev { width: 48px; text-align: right; flex: none; font-weight: 700; color: #334155; }
.evo-desc { font-size: 11px; color: #6b7280; margin-top: 6px; line-height: 1.5; }
.ask3-btn { display: block; width: calc(100% - 24px); margin: 8px 12px 0; padding: 8px 10px; border: none; border-radius: 10px; font-size: 12.5px; font-weight: 700; color: #fff; background: linear-gradient(90deg,#7c3aed,#2563eb); cursor: pointer; }
.ask3-btn:active { opacity: .85; }
.cmp-box { margin: 10px 0; border: 1px solid #ddd6fe; border-radius: 12px; overflow: hidden; background: #fafaff; }
.cmp-h { background: linear-gradient(90deg,#7c3aed,#2563eb); color: #fff; font-size: 12px; font-weight: 700; padding: 6px 10px; }
.cmp-q { font-size: 12.5px; padding: 8px 10px; color: #334155; background: #fff; border-bottom: 1px solid #ede9fe; }
.cmp-cols { display: flex; gap: 6px; padding: 8px; }
.cmp-col { flex: 1; min-width: 0; background: #fff; border: 1px solid #e9e4ff; border-radius: 10px; padding: 6px 8px; }
.cmp-t { font-size: 11px; font-weight: 700; color: #5b21b6; margin-bottom: 4px; }
.cmp-t b { color: #7c3aed; }
.cmp-p { display: block; font-weight: 400; color: #94a3b8; font-size: 10px; margin-top: 2px; }
.cmp-c { font-size: 11.5px; line-height: 1.6; color: #334155; max-height: 170px; overflow: auto; }
.cmp-f { margin-top: 5px; }
.cmp-f i { font-style: normal; font-size: 10px; padding: 1px 7px; border-radius: 999px; }
.cmp-f .ok { background: #dcfce7; color: #15803d; }
.cmp-f .no { background: #fef3c7; color: #b45309; }
.cmp-tip { font-size: 11px; color: #6b7280; padding: 0 10px 8px; }

.gd-note { font-size: 13px; line-height: 1.7; color: #64748b; background: #f8fafc; border: 1px dashed #cbd5e1; border-radius: 12px; padding: 10px 12px; }

/* —— 抽屉头部：渐变 + 图标 + 呼吸灯 —— */
#growDrawer .dr-head { align-items: center; gap: 10px; }
.dr-ico { width: 42px; height: 42px; border-radius: 13px; background: rgba(255,255,255,.2); display: flex; align-items: center; justify-content: center; font-size: 21px; flex: none; }
.dr-txt { flex: 1; min-width: 0; }
#growDrawer .dr-d { display: flex; align-items: center; gap: 6px; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: #4ade80; display: inline-block; animation: gdPulse 1.6s infinite; }
@keyframes gdPulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: .45; transform: scale(.75); } }

/* —— 能力值卡 —— */
.cap-top { display: flex; justify-content: space-between; align-items: baseline; font-size: 13.5px; font-weight: 700; margin-bottom: 7px; }
.cap-top b { font-size: 21px; font-weight: 800; background: linear-gradient(135deg, #0ea5e9, #6366f1); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* —— 范围分段按钮 —— */
.ask-scope { flex-wrap: wrap; }
.sp { border: 1.5px solid var(--line); background: #fff; color: #64748b; border-radius: 20px; padding: 5px 13px; font-size: 13px; font-weight: 700; cursor: pointer; transition: all .16s; font-family: inherit; }
.sp:hover { border-color: #c4b5fd; color: var(--violet); }
.sp.on { background: linear-gradient(135deg, #7c3aed, #6366f1); border-color: transparent; color: #fff; box-shadow: 0 3px 9px rgba(124,58,237,.32); }

/* —— 提问按钮 —— */
.ask-send { border: 0; border-radius: 12px; padding: 0 18px; min-height: 60px; background: linear-gradient(135deg, #7c3aed, #6366f1); color: #fff; font-weight: 700; font-size: 15px; cursor: pointer; white-space: nowrap; box-shadow: 0 4px 12px rgba(124,58,237,.3); font-family: inherit; }
.ask-send:hover { filter: brightness(1.07); }
.ask-send:disabled { opacity: .5; cursor: not-allowed; }

/* ============ 挑战一 · 数据规模算账 ============ */
.fact-chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 12px 0 4px; }
.fchip { background: #eef2ff; border: 1.5px solid #a5b4fc; color: #3730a3; border-radius: 12px; padding: 8px 14px; font-size: 15.5px; font-weight: 600; }
.fchip b { font-size: 17px; }
.fchip i { display: block; font-style: normal; font-weight: 400; font-size: 12.5px; color: #6366f1; margin-top: 2px; }
.scale-opts { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin-top: 10px; }
.scale-opts button { border: 2px solid var(--line); background: #fff; border-radius: 12px; padding: 12px 10px; font-size: 16.5px; font-weight: 700; color: var(--ink); cursor: pointer; transition: all .15s; }
.scale-opts button:hover { border-color: var(--violet); transform: translateY(-2px); }
.scale-opts button.right { border-color: var(--violet); background: #f5f3ff; color: var(--violet); }
.scale-math { background: #f8fafc; border-left: 4px solid #6366f1; border-radius: 10px; padding: 12px 16px; margin-top: 16px; font-size: 16px; line-height: 1.9; }
.scale-verdict { border-radius: 12px; padding: 12px 16px; margin-top: 12px; font-size: 17px; font-weight: 600; }
.scale-verdict.ok { background: #ecfdf5; color: #047857; border: 1.5px solid #34d399; }
.scale-verdict.no { background: #fef2f2; color: #b91c1c; border: 1.5px solid #f87171; }
.scale-cmp { display: grid; gap: 8px; margin-top: 12px; }
.scale-cmp div { background: #fff7ed; border: 1.5px solid #fdba74; color: #7c2d12; border-radius: 12px; padding: 10px 14px; font-size: 15.5px; }
.calc-panel { background: #f5f3ff; border: 2px dashed #c4b5fd; border-radius: 14px; padding: 16px; margin-top: 14px; }
.calc-row { display: flex; align-items: center; gap: 14px; margin: 12px 0; }
.calc-row label { flex: 0 0 170px; font-size: 16px; font-weight: 600; }
.calc-row input[type=range] { flex: 1; accent-color: var(--violet); height: 26px; }
.calc-out { display: grid; gap: 8px; margin-top: 14px; }
.calc-out div { background: #fff; border-radius: 12px; padding: 11px 14px; font-size: 16px; border: 1.5px solid #e9d5ff; }
.calc-out b { font-size: 18px; color: var(--violet); }
.calc-out span { color: var(--mut); font-size: 14px; }

/* ============ 挑战二 · 温度实验室 ============ */
.temp-pick { display: grid; gap: 8px; }
.temp-pick label { display: flex; align-items: center; gap: 8px; background: #fff; border: 2px solid var(--line); border-radius: 12px; padding: 10px 14px; font-size: 16px; font-weight: 600; cursor: pointer; }
.temp-pick label:has(input:checked) { border-color: var(--violet); background: #f5f3ff; color: var(--violet); }
.temp-q { background: #ecfeff; border: 1.5px solid #22d3ee; color: #155e75; border-radius: 12px; padding: 10px 14px; font-size: 16px; margin: 14px 0 10px; }
.temp-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; }
.temp-col { border-radius: 16px; border: 2px solid var(--line); background: #fff; overflow: hidden; display: flex; flex-direction: column; }
.temp-col .tc-head { padding: 10px 12px; font-size: 16px; color: #fff; }
.temp-col.t0 .tc-head { background: #0e7490; }
.temp-col.t1 .tc-head { background: #7c3aed; }
.temp-col.t1\.5 .tc-head, .temp-col.t1p5 .tc-head { background: #ea580c; }
.temp-col .tc-body { padding: 12px; font-size: 15.5px; line-height: 1.8; flex: 1; }
.temp-col .tc-tip { padding: 8px 12px; font-size: 13px; background: #f8fafc; color: var(--mut); }

/* ============ 教师端 · 评价管理 ============ */
.qz-item { border: 2px solid var(--line); border-radius: 14px; padding: 14px 18px; margin: 12px 0; background: #fff; }
.qz-item .qt { font-weight: 700; font-size: 16px; line-height: 1.7; }
.qz-item .qo { color: var(--mut); font-size: 14.5px; margin-top: 6px; line-height: 1.7; }
.qz-item .qa { margin-top: 6px; font-size: 14.5px; }
.qz-item .qa b.ok { color: var(--green); }
.qz-edit { border: 2px solid var(--blue-l); border-radius: 14px; padding: 16px 18px; margin: 12px 0; background: #f8fbff; }
.qz-edit input, .qz-edit textarea { width: 100%; border: 2px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: 15.5px; font-family: inherit; margin: 6px 0; }
.qz-edit input:focus, .qz-edit textarea:focus { outline: 0; border-color: var(--blue); }
.stat-row { display: flex; align-items: center; gap: 10px; margin: 10px 0; font-size: 15px; }
.stat-row .sl { flex: 1; min-width: 200px; line-height: 1.6; }
.stat-row .st { flex: 1.2; height: 20px; background: #eef2f7; border-radius: 10px; overflow: hidden; flex: none; }
.stat-row .sf { height: 100%; background: linear-gradient(90deg, var(--violet), var(--blue)); border-radius: 10px; }
.stat-row .sn { width: 110px; text-align: right; font-weight: 700; flex: none; font-variant-numeric: tabular-nums; }
.fb-item { border-bottom: 1px dashed var(--line); padding: 10px 2px; font-size: 15.5px; line-height: 1.7; }
.fb-item:last-child { border-bottom: 0; }
.fb-item .fb-n { font-weight: 700; color: var(--violet); }
.praise-wall { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.praise-wall span { background: var(--green-l); color: #047857; border-radius: 18px; padding: 8px 16px; font-size: 15px; font-weight: 600; }