:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-strong: #ffffff;
  --surface-tint: #eef2fa;
  --ink: #1b2437;
  --muted: #647089;
  --line: #dfe5f1;
  --accent: #4f6df5;
  --accent-strong: #3548c8;
  --accent-soft: #e8edfe;
  --mint: #14b8a6;
  --coral: #f0654f;
  --blue: #4f6df5;
  --green: #22a06b;
  --gold: #e5a54b;
  --shadow: 0 10px 30px rgba(27, 36, 55, 0.08), 0 2px 8px rgba(27, 36, 55, 0.04);
  --shadow-lg: 0 24px 60px rgba(27, 36, 55, 0.16);
  --radius: 12px;
  --radius-lg: 18px;
  color-scheme: light;
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 85% 8%, rgba(79, 109, 245, 0.09), transparent 30rem),
    radial-gradient(circle at 8% 92%, rgba(20, 184, 166, 0.07), transparent 28rem),
    var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  letter-spacing: -0.015em;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 22px 18px;
  border-right: 1px solid var(--line);
  background: rgba(255, 253, 247, 0.78);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 8px 24px;
}

.profile-button {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin-bottom: 16px;
  border: 0;
  border-radius: var(--radius);
  padding: 12px 10px;
  background: #ffffff;
  color: var(--ink);
  text-align: left;
  box-shadow: 0 8px 22px rgba(27, 36, 55, 0.06);
}

.profile-button strong,
.profile-button small {
  display: block;
}

.profile-button small {
  margin-top: 3px;
  color: var(--muted);
}

.avatar {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #1b2437;
  color: #ffffff;
  font-weight: 800;
}

.avatar.large {
  width: 70px;
  height: 70px;
  font-size: 28px;
}

.avatar.mini {
  width: 34px;
  height: 34px;
  font-size: 13px;
  background: #6aa58f;
}

.course-nav {
  display: grid;
  gap: 14px;
  max-height: calc(100vh - 118px);
  overflow: auto;
  padding-right: 4px;
}

.home-nav {
  width: 100%;
  margin-bottom: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 11px 12px;
  background: #ffffff;
  color: var(--ink);
  text-align: left;
  font-weight: 800;
}

.home-nav.active {
  background: #e8edfe;
}

.chapter-nav h3 {
  margin: 0 0 8px;
  color: var(--accent-strong);
  font-size: 13px;
  line-height: 1.35;
}

.chapter-title {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  width: 100%;
  margin-bottom: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 11px 10px;
  background: #f7f9ff;
  color: var(--ink);
  text-align: left;
}

.chapter-title span {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #e8edfe;
  color: var(--accent-strong);
  font-size: 13px;
}

.chapter-title strong {
  font-size: 14px;
  line-height: 1.35;
}

.chapter-title.active {
  border-color: rgba(213, 150, 40, 0.72);
  background: #fff1c9;
}

.section-list {
  display: none;
  padding-left: 6px;
}

.section-list.expanded {
  display: block;
}

.chapter-btn {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 8px 10px;
  width: 100%;
  margin-bottom: 6px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 10px;
  background: transparent;
  color: var(--ink);
  text-align: left;
}

.chapter-btn:hover,
.chapter-btn.active {
  border-color: var(--line);
  background: #e8edfe;
}

.chapter-btn span {
  grid-row: span 2;
  display: grid;
  place-items: center;
  height: 34px;
  border-radius: 8px;
  background: #fff8e6;
  color: var(--accent-strong);
  font-weight: 800;
  font-size: 12px;
}

.chapter-btn strong {
  min-width: 0;
  font-size: 13px;
  line-height: 1.35;
}

.chapter-btn small {
  color: var(--muted);
}

.sidebar-resource-list {
  display: grid;
  gap: 6px;
  margin: 2px 0 12px 12px;
  padding-left: 10px;
  border-left: 2px solid #dfe5f1;
}

.sidebar-resource-btn {
  display: grid;
  gap: 3px;
  width: 100%;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 9px 10px;
  background: transparent;
  color: var(--ink);
  text-align: left;
}

.sidebar-resource-btn:hover,
.sidebar-resource-btn.active {
  border-color: var(--line);
  background: #fff1c9;
}

.sidebar-resource-btn strong {
  font-size: 12px;
  line-height: 1.35;
}

.sidebar-resource-btn span {
  color: var(--muted);
  font-size: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: #1b2437;
  color: #ffffff;
  font-weight: 800;
}

.brand strong,
.brand span {
  display: block;
}

.brand span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: grid;
  gap: 6px;
}

.nav-item {
  width: 100%;
  border: 0;
  border-radius: var(--radius);
  padding: 11px 12px;
  background: transparent;
  color: var(--muted);
  text-align: left;
}

.nav-item:hover,
.nav-item.active {
  background: #e8edfe;
  color: var(--ink);
}

.main {
  padding: 28px clamp(18px, 3vw, 40px) 48px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 26px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 700;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: 24px;
}

h3 {
  margin-bottom: 9px;
  font-size: 17px;
}

.top-actions,
.button-row,
.segmented,
.chip-row,
.meta-row,
.agent-tabs,
.stage-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.primary-btn,
.ghost-btn,
.soft-btn,
.danger-btn,
.icon-btn,
.tab-btn {
  border: 1px solid transparent;
  border-radius: var(--radius);
  min-height: 38px;
  padding: 9px 13px;
  transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}

.primary-btn {
  background: var(--ink);
  color: #ffffff;
}

.ghost-btn,
.soft-btn,
.tab-btn {
  background: var(--surface-strong);
  border-color: var(--line);
  color: var(--ink);
}

.soft-btn {
  background: #f6ead0;
}

.danger-btn {
  background: #fff1ea;
  border-color: #efc2b4;
  color: #9b4f3d;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 38px;
  padding: 0;
  background: #ffffff;
  border-color: var(--line);
  color: var(--ink);
  font-size: 20px;
}

.primary-btn:hover,
.ghost-btn:hover,
.soft-btn:hover,
.danger-btn:hover,
.icon-btn:hover,
.tab-btn:hover {
  transform: translateY(-1px);
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.lesson-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(310px, 380px);
  gap: 16px;
  align-items: start;
}

.course-hero {
  display: grid;
  align-items: center;
  min-height: min(72vh, 760px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  padding: clamp(28px, 6vw, 72px);
  background:
    linear-gradient(90deg, rgba(255, 253, 247, 0.96) 0%, rgba(255, 250, 234, 0.78) 48%, rgba(255, 247, 223, 0.36) 100%),
    url("/public/images/学习情境适应需求识别页面.png") center right / min(62%, 760px) no-repeat;
  box-shadow: var(--shadow);
}

.course-hero-content {
  max-width: 700px;
}

.course-hero h2 {
  margin-bottom: 18px;
  font-size: clamp(44px, 7vw, 92px);
  line-height: 0.96;
  white-space: nowrap;
}

.course-hero p {
  max-width: 560px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.resource-column,
.chapter-work-column {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.resource-side {
  position: sticky;
  top: 24px;
  display: grid;
  gap: 16px;
  max-height: calc(100vh - 48px);
  overflow: auto;
}

.resource-panel {
  padding: 18px;
}

.resource-header,
.section-ai-head,
.dynamic-head,
.profile-hero,
.agent-showcase {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.resource-header {
  margin-bottom: 12px;
}

.resource-header h2 {
  margin-bottom: 0;
}

.resource-link {
  flex: 0 0 auto;
  text-decoration: none;
}

.resource-viewer {
  display: block;
  width: 100%;
  height: min(76vh, 820px);
  min-height: 620px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.resource-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 12px;
}

.resource-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px 10px;
  background: #f7f9ff;
  color: var(--ink);
  text-decoration: none;
  font-size: 13px;
}

.resource-card-list {
  display: grid;
  gap: 10px;
}

.resource-card-btn {
  display: grid;
  gap: 5px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 13px;
  background: #ffffff;
  color: var(--ink);
  text-align: left;
}

.resource-card-btn:hover,
.resource-card-btn.active {
  border-color: rgba(213, 150, 40, 0.72);
  background: #fff1c9;
}

.resource-card-btn strong {
  line-height: 1.35;
}

.resource-card-btn span {
  color: var(--muted);
  font-size: 13px;
}

.resource-preview h2 {
  font-size: 20px;
  line-height: 1.35;
}

.empty-preview {
  min-height: 320px;
  display: grid;
  align-content: center;
}

.empty-resource {
  min-height: 420px;
  display: grid;
  align-content: center;
}

.empty-illustration {
  margin-top: 20px;
}

.tool-dock {
  padding: 14px;
}

.module-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.tool-body {
  min-height: 180px;
}

.section-ai-head {
  align-items: flex-start;
  justify-content: flex-start;
}

.section-ai-head h2 {
  margin-bottom: 0;
  font-size: 20px;
}

.bot-face {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-evenly;
  width: 68px;
  height: 54px;
  border: 2px solid #1b2437;
  border-radius: 18px 18px 16px 16px;
  background: #fff8e6;
  box-shadow: inset 0 -3px 0 rgba(79, 109, 245, 0.18);
}

.bot-face::before {
  content: "";
  position: absolute;
  top: -10px;
  width: 18px;
  height: 10px;
  border-left: 2px solid #1b2437;
  border-top: 2px solid #1b2437;
  transform: rotate(28deg);
}

.bot-eye {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #1b2437;
}

.bot-code {
  font-weight: 900;
  color: var(--accent-strong);
}

.agent-showcase {
  align-items: flex-start;
  justify-content: flex-start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: #f7f9ff;
}

.agent-switcher {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.hero-agent {
  margin-bottom: 14px;
}

.agent-grid-full {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 12px;
}

.agent-choice {
  display: grid;
  justify-items: start;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: #ffffff;
  color: var(--ink);
  text-align: left;
}

.agent-choice.active {
  border-color: rgba(213, 150, 40, 0.76);
  background: #fff1c9;
}

.agent-choice strong,
.agent-choice small {
  display: block;
}

.agent-choice small {
  margin-top: 6px;
  color: var(--muted);
  line-height: 1.45;
}

.suggestion-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 12px;
}

.agent-mini {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 72px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  background: #ffffff;
  color: var(--ink);
  text-align: left;
}

.agent-mini .bot-face {
  width: 48px;
  height: 38px;
  border-radius: 14px;
}

.agent-mini.active {
  border-color: rgba(213, 150, 40, 0.72);
  background: #fff1c9;
}

.compact-chat {
  min-height: 240px;
  max-height: 360px;
  margin-top: 12px;
}

.section-chat {
  min-height: 330px;
  max-height: 45vh;
}

.chat-form.vertical {
  grid-template-columns: 1fr;
}

.dynamic-head {
  align-items: stretch;
  margin-bottom: 16px;
}

.strong-metric {
  display: grid;
  min-width: 220px;
  align-content: center;
}

.panel-lite {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: #f7f9ff;
}

.dialog-narrow {
  width: min(560px, calc(100vw - 32px));
}

.dialog-medium {
  width: min(860px, calc(100vw - 32px));
}

.task-companion-panel {
  width: min(1040px, calc(100vw - 32px));
}

.task-companion-dialog-body {
  display: grid;
  gap: 16px;
  padding: clamp(22px, 4vw, 38px);
}

.task-dialog-head,
.task-companion-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.task-dialog-head {
  justify-content: flex-start;
}

.task-dialog-head h2,
.task-companion-entry h3 {
  margin-bottom: 6px;
}

.knowledge-review {
  display: grid;
  gap: 14px;
}

.review-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.review-card {
  display: grid;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: #ffffff;
}

.review-card h3 {
  margin-bottom: 0;
}

.review-card small,
.small-note {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

.review-module {
  border-left: 3px solid #e6c77f;
  padding-left: 10px;
}

.review-module strong {
  display: block;
  margin-bottom: 4px;
  color: var(--accent-strong);
}

.review-module p {
  margin-bottom: 0;
  color: #514b3c;
  line-height: 1.65;
}

.login-card,
.profile-detail {
  display: grid;
  gap: 14px;
  padding: clamp(22px, 4vw, 38px);
}

.login-card label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-weight: 700;
}

.login-card input,
.login-card select,
.login-card textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 11px 12px;
  background: #fffefa;
  color: var(--ink);
}

.login-card textarea {
  min-height: 96px;
  resize: vertical;
}

.profile-hero {
  justify-content: flex-start;
}

.discussion-panel {
  display: grid;
  gap: 12px;
}

.discussion-panel h2 {
  margin-bottom: 0;
  font-size: 22px;
  line-height: 1.35;
}

.discussion-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.discussion-form textarea {
  min-height: 72px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: #fffefa;
}

.discussion-screen {
  min-height: 620px;
}

.auto-cue {
  display: grid;
  gap: 8px;
  margin: 10px 0 12px;
  border: 1px solid rgba(213, 150, 40, 0.42);
  border-radius: var(--radius);
  padding: 13px;
  background: #fff6dc;
}

.auto-cue strong {
  color: var(--accent-strong);
}

.auto-cue p {
  margin-bottom: 0;
  color: #554b36;
  line-height: 1.65;
}

.support-module-grid,
.companion-map-grid {
  display: grid;
  gap: 10px;
}

.support-module-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.support-module-grid span {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 9px;
  background: #ffffff;
  text-align: center;
  color: #514b3c;
  font-size: 13px;
}

.case-supplement-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.case-supplement-form textarea {
  min-height: 70px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: #fffefa;
}

.companion-map-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.companion-map-grid article {
  display: grid;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: #ffffff;
}

.companion-map-grid p,
.companion-map-grid small {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.match-reason-panel {
  margin-bottom: 14px;
}

.coordinator-panel {
  display: grid;
  gap: 12px;
}

.coordinator-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.coordinator-flow span {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  background: #ffffff;
  text-align: center;
  color: #554b36;
  font-size: 13px;
}

.coordinator-flow span:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
}

.coordinator-decision {
  display: grid;
  gap: 8px;
  border: 1px solid rgba(101, 160, 136, 0.32);
  border-radius: var(--radius);
  padding: 10px;
  background: #f4fbf4;
}

.coordinator-decision p {
  margin: 0;
  color: #4f584d;
  line-height: 1.6;
}

.feedback-loop {
  margin-bottom: 16px;
}

.loop-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 12px 0;
}

.loop-step {
  display: flex;
  align-items: center;
  gap: 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  background: #ffffff;
}

.loop-step strong {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #e8edfe;
  color: var(--accent-strong);
}

.loop-step.active {
  border-color: rgba(106, 165, 143, 0.55);
  background: #eef7f1;
}

.task-workspace {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.task-scenario-list {
  display: grid;
  gap: 8px;
}

.task-scenario-list h2 {
  margin-bottom: 4px;
}

.scenario-btn span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.task-detail {
  min-width: 0;
}

.scenario-partner-panel {
  border-color: rgba(111, 143, 184, 0.46);
}

.scenario-partner-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.scenario-thinking-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.scenario-thinking-grid label {
  display: grid;
  gap: 7px;
  color: #514b3c;
  font-weight: 700;
}

.scenario-thinking-grid textarea {
  min-height: 92px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 11px;
  background: #fffefa;
  font-weight: 400;
  line-height: 1.6;
}

.scenario-action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 12px 0;
}

.scenario-action-row .soft-btn.active {
  border-color: rgba(111, 143, 184, 0.72);
  background: #edf3fb;
}

.scenario-action-row button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.scenario-support-output {
  display: grid;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 13px;
  background: #f7f9ff;
}

.scenario-support-output > strong {
  color: #425f84;
}

.grid {
  display: grid;
  gap: 16px;
}

.grid.two {
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.panel,
.card,
.metric,
.tool-surface {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 253, 247, 0.92);
  box-shadow: 0 10px 30px rgba(27, 36, 55, 0.06);
}

.panel {
  padding: clamp(18px, 2vw, 26px);
}

.card,
.metric,
.tool-surface {
  padding: 16px;
}

.hero-band {
  position: relative;
  overflow: hidden;
  min-height: 300px;
  border-radius: var(--radius);
  padding: clamp(24px, 4vw, 46px);
  background:
    linear-gradient(110deg, rgba(255, 253, 247, 0.92) 0%, rgba(255, 249, 232, 0.84) 54%, rgba(226, 238, 223, 0.75) 100%),
    url("/public/images/学习情境适应需求识别页面.png") center right / min(58%, 620px) no-repeat;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero-band h2 {
  max-width: 680px;
  font-size: clamp(30px, 5vw, 62px);
  line-height: 1.04;
}

.hero-band p {
  max-width: 580px;
  color: var(--muted);
  line-height: 1.8;
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.metric strong {
  display: block;
  font-size: 26px;
}

.metric span,
.muted {
  color: var(--muted);
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 5px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff8e6;
  color: #5c4d2e;
  font-size: 13px;
}

.chip.mint {
  background: #eaf4ef;
  color: #315f50;
}

.chip.coral {
  background: #fff0ea;
  color: #914d3d;
}

.chip.blue {
  background: #edf3fb;
  color: #425f84;
}

.progress {
  height: 10px;
  border-radius: 999px;
  background: #efe2c5;
  overflow: hidden;
}

.progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--mint));
}

.timeline {
  display: grid;
  gap: 12px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.timeline-item time {
  color: var(--accent-strong);
  font-weight: 700;
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.option-card {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  min-height: 74px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 13px;
  background: #ffffff;
  text-align: left;
}

.option-card.selected,
.tab-btn.active,
.agent-card.active,
.scenario-btn.active,
.stage-item.active,
.likert-btn.selected {
  border-color: rgba(213, 150, 40, 0.72);
  background: #fff1c9;
}

.option-code {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: #f3e2bd;
  font-weight: 800;
}

.likert-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.likert-item {
  display: grid;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 13px;
  background: #ffffff;
}

.likert-item > div:first-child {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.55;
}

.likert-scale {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.likert-btn {
  display: grid;
  gap: 2px;
  min-height: 56px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 7px 6px;
  background: #f7f9ff;
  color: var(--ink);
  text-align: center;
}

.likert-btn span {
  font-weight: 900;
}

.likert-btn small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.25;
}

.test-dialog {
  width: min(1120px, calc(100vw - 32px));
  padding: 0;
  border: 0;
  border-radius: 10px;
  background: transparent;
}

.test-dialog::backdrop {
  background: rgba(47, 48, 40, 0.38);
  backdrop-filter: blur(3px);
}

.test-panel {
  position: relative;
  max-height: calc(100vh - 38px);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.dialog-close {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 5;
}

.test-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(420px, 1.05fr);
  gap: 22px;
  min-height: 690px;
  padding: clamp(20px, 4vw, 40px);
}

.question-visual {
  display: grid;
  place-items: center;
  min-height: 430px;
  border-radius: var(--radius);
  background: #fff8e7;
  border: 1px solid var(--line);
}

.question-visual img {
  display: block;
  width: min(100%, 680px);
  max-height: 560px;
  object-fit: contain;
}

.test-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.test-copy h2 {
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.15;
}

.test-progress {
  margin-bottom: 18px;
}

.profile-tree {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  align-items: end;
  min-height: 180px;
  padding: 18px 0 4px;
}

.tree-bar {
  display: grid;
  align-content: end;
  gap: 8px;
  min-width: 0;
  text-align: center;
}

.tree-stem {
  width: 46px;
  margin: 0 auto;
  border-radius: 999px 999px 8px 8px;
  background: linear-gradient(180deg, #6aa58f, #4f6df5);
}

.tree-bar span {
  min-height: 42px;
  color: var(--muted);
  font-size: 12px;
}

.result-visual-stack {
  display: grid;
  gap: 14px;
  align-content: center;
}

.radar-card {
  display: grid;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: #ffffff;
}

.radar-card h3 {
  margin-bottom: 0;
}

.profile-radar {
  width: min(100%, 360px);
  margin: 0 auto;
  display: block;
}

.radar-grid polygon {
  fill: none;
  stroke: #dfe5f1;
  stroke-width: 1;
}

.radar-grid line {
  stroke: #dfe5f1;
  stroke-width: 1;
}

.radar-grid text {
  fill: #6f6858;
  font-size: 12px;
  text-anchor: middle;
  dominant-baseline: middle;
}

.radar-area {
  fill: rgba(106, 165, 143, 0.28);
  stroke: #6aa58f;
  stroke-width: 2;
}

.radar-dots circle {
  fill: #4f6df5;
  stroke: #ffffff;
  stroke-width: 2;
}

.radar-legend {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.radar-legend div {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px;
  background: #f7f9ff;
}

.radar-legend strong,
.radar-legend span {
  display: block;
}

.radar-legend strong {
  color: var(--accent-strong);
  font-size: 18px;
}

.radar-legend span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.weekly-report {
  display: grid;
  gap: 16px;
  padding: clamp(22px, 4vw, 38px);
}

.weekly-report-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.weekly-report-head h2 {
  margin-bottom: 8px;
}

.report-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: #ffffff;
}

.report-block p {
  margin-bottom: 0;
  color: #514b3c;
  line-height: 1.75;
}

.report-data-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.agent-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--surface-strong);
}

.agent-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 12px;
  border-radius: 8px;
  background: #e8edfe;
  font-weight: 900;
  color: var(--accent-strong);
}

.agent-card:nth-child(2) .agent-icon,
.agent-card[data-agent="planner"] .agent-icon {
  background: #eaf4ef;
  color: #315f50;
}

.agent-card:nth-child(3) .agent-icon,
.agent-card[data-agent="scenario"] .agent-icon {
  background: #edf3fb;
  color: #425f84;
}

.agent-card:nth-child(4) .agent-icon,
.agent-card[data-agent="discussion"] .agent-icon {
  background: #fff0ea;
  color: #914d3d;
}

.prompt-box {
  max-height: 320px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: #f7f9ff;
  color: #4f493a;
  line-height: 1.75;
  white-space: pre-wrap;
}

.scenario-list {
  display: grid;
  gap: 8px;
}

.scenario-btn,
.stage-item {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 11px 12px;
  background: #ffffff;
  color: var(--ink);
  text-align: left;
}

.task-shell {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 16px;
}

.task-copy {
  display: grid;
  gap: 16px;
}

.role-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.role-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  background: #ffffff;
}

.collaborative-doc {
  display: grid;
  gap: 16px;
}

.collab-head,
.presence-row,
.doc-meta,
.contribution-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.collab-head {
  justify-content: space-between;
  align-items: flex-start;
}

.presence-row {
  flex-wrap: wrap;
}

.collab-editor {
  min-height: 260px;
}

.doc-meta {
  flex-wrap: wrap;
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
}

.contribution-list {
  display: grid;
  gap: 10px;
}

.contribution-item {
  display: grid;
  grid-template-columns: 82px 74px minmax(0, 1fr) 42px;
}

.contribution-item small {
  color: var(--muted);
}

.group-discussion {
  display: grid;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.ig-thread {
  display: grid;
  gap: 12px;
  max-height: 420px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: #f7f9ff;
}

.ig-message {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.ig-message.mine {
  grid-template-columns: minmax(0, 1fr) 34px;
}

.ig-message.mine .avatar {
  grid-column: 2;
  grid-row: 1;
  background: #1b2437;
}

.ig-message.mine .ig-message-body {
  grid-column: 1;
  justify-self: end;
  background: #1b2437;
  color: #ffffff;
}

.ig-message.teacher .avatar {
  background: #4f6df5;
}

.ig-message.teacher .ig-message-body {
  border-color: rgba(106, 165, 143, 0.52);
  background: #eef7f1;
}

.ig-message-body {
  max-width: 760px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #ffffff;
}

.ig-message-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 5px;
}

.ig-message-meta span,
.ig-message-body small {
  color: var(--muted);
  font-size: 12px;
}

.ig-message.mine .ig-message-meta span,
.ig-message.mine .ig-message-body small {
  color: rgba(255, 248, 227, 0.72);
}

.ig-message-body p {
  margin-bottom: 4px;
  line-height: 1.65;
}

.group-message-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.group-message-form textarea {
  min-height: 76px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: #fffefa;
}

.editor {
  min-height: 220px;
  width: 100%;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: #fffefa;
  line-height: 1.7;
}

.checklist {
  display: grid;
  gap: 10px;
}

.checklist label {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  color: #514b3c;
}

.upload-zone {
  display: grid;
  place-items: center;
  min-height: 190px;
  border: 1.5px dashed #d9c79e;
  border-radius: var(--radius);
  background: #f7f9ff;
  text-align: center;
}

.file-list,
.discussion-list,
.chat-log,
.record-list {
  display: grid;
  gap: 10px;
}

.file-item,
.discussion-item,
.chat-bubble,
.record-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: #ffffff;
}

.video-preview {
  width: 100%;
  max-height: 420px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #1b2437;
}

.chat-shell {
  display: grid;
  grid-template-columns: minmax(260px, 0.34fr) minmax(0, 0.66fr);
  gap: 16px;
}

.chat-log {
  min-height: 430px;
  max-height: 52vh;
  overflow: auto;
  align-content: start;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f7f9ff;
}

.chat-bubble {
  width: fit-content;
  max-width: min(86%, 720px);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.55;
}

.chat-bubble.user {
  justify-self: end;
  max-width: min(72%, 620px);
  background: #1b2437;
  color: #ffffff;
}

.chat-bubble.assistant {
  justify-self: start;
}

.chat-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  margin-top: 10px;
}

.chat-form textarea {
  min-height: 54px;
  max-height: 160px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: #fffefa;
}

.analytics-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 16px;
}

.heat-row {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) 52px;
  gap: 10px;
  align-items: center;
  margin: 12px 0;
}

.heat-track {
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: #efe2c5;
}

.heat-track span {
  display: block;
  height: 100%;
  border-radius: inherit;
}

@media (max-width: 1080px) {
  .grid.two,
  .grid.three,
  .grid.four,
  .task-shell,
  .chat-shell,
  .analytics-grid,
  .test-layout,
  .lesson-layout,
  .task-workspace {
    grid-template-columns: 1fr;
  }

  .agent-grid-full {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .support-module-grid,
  .companion-map-grid,
  .contribution-item,
  .review-card-grid,
  .scenario-thinking-grid,
  .loop-steps,
  .coordinator-flow {
    grid-template-columns: 1fr;
  }

  .coordinator-flow span:not(:last-child)::after {
    display: none;
  }

  .section-ai {
    position: static;
    max-height: none;
  }

  .resource-side {
    position: static;
    max-height: none;
  }

  .stat-strip,
  .role-grid,
  .radar-legend,
  .report-data-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .question-visual {
    min-height: 320px;
  }
}

@media (max-width: 780px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .course-nav {
    max-height: none;
  }

  .chapter-btn {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .option-grid,
  .likert-scale,
  .stat-strip,
  .role-grid,
  .radar-legend,
  .report-data-strip {
    grid-template-columns: 1fr;
  }

  .weekly-report-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .scenario-partner-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-band {
    background:
      linear-gradient(180deg, rgba(255, 253, 247, 0.95), rgba(255, 249, 232, 0.9)),
      url("/public/images/学习情境适应需求识别页面.png") center bottom / 88% no-repeat;
    padding-bottom: 260px;
  }

  .course-hero {
    min-height: 620px;
    background:
      linear-gradient(180deg, rgba(255, 253, 247, 0.95), rgba(255, 249, 232, 0.78)),
      url("/public/images/学习情境适应需求识别页面.png") center bottom / 92% no-repeat;
    padding-bottom: 300px;
  }

  .resource-viewer {
    min-height: 480px;
    height: 62vh;
  }

  .agent-switcher {
    grid-template-columns: 1fr;
  }

  .agent-grid-full {
    grid-template-columns: 1fr;
  }

  .task-dialog-head,
  .task-companion-entry,
  .group-message-form {
    align-items: stretch;
    flex-direction: column;
    grid-template-columns: 1fr;
  }
}

/* ============ 课程切换与上传课程（新增组件） ============ */

.course-switch {
  margin-bottom: 14px;
}

.course-switch-box {
  display: grid;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-tint);
}

.course-switch-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.course-add-btn {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--accent);
  font-size: 16px;
  font-weight: 700;
  transition: all 0.15s ease;
}

.course-add-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.course-option {
  display: grid;
  gap: 2px;
  width: 100%;
  border: 1px solid transparent;
  border-radius: 9px;
  padding: 9px 10px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  transition: all 0.15s ease;
}

.course-option strong {
  font-size: 13.5px;
  line-height: 1.3;
}

.course-option small {
  font-size: 11.5px;
  color: var(--muted);
}

.course-option:hover:not(:disabled) {
  background: var(--surface);
  border-color: var(--line);
}

.course-option.active {
  background: var(--surface);
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(79, 109, 245, 0.12);
}

.course-option.active strong {
  color: var(--accent-strong);
}

.course-option:disabled {
  opacity: 0.55;
  cursor: wait;
}

.upload-dialog {
  z-index: 60;
}

.upload-panel {
  min-width: min(520px, 92vw);
}

.upload-drop {
  margin-top: 14px;
  border: 2px dashed var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface-tint);
  transition: all 0.18s ease;
}

.upload-drop:hover,
.upload-drop.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.upload-drop-inner {
  display: grid;
  gap: 6px;
  justify-items: center;
  padding: 38px 20px;
  cursor: pointer;
  text-align: center;
}

.upload-drop-inner strong {
  font-size: 16px;
  color: var(--accent-strong);
}

.upload-drop-inner span {
  font-size: 12.5px;
  color: var(--muted);
  max-width: 360px;
  line-height: 1.6;
}

.upload-progress {
  margin-top: 14px;
  display: grid;
  gap: 8px;
}

.upload-progress p {
  margin: 0;
  font-size: 13px;
  color: var(--ink);
}

.upload-bar {
  height: 8px;
  border-radius: 99px;
  background: var(--line);
  overflow: hidden;
}

.upload-bar-fill {
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--accent), var(--mint));
  transition: width 0.25s ease;
}

.upload-text-viewer {
  overflow: auto;
  padding: 18px;
  background: var(--surface);
}

.chapter-text-pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font: 13.5px/1.85 "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
}

.chapter-summary {
  margin-bottom: 14px;
  padding: 12px 14px;
  border-left: 3px solid var(--mint);
  border-radius: 10px;
  background: rgba(20, 184, 166, 0.07);
}

.chapter-summary strong {
  display: block;
  margin-bottom: 4px;
  font-size: 12.5px;
  color: var(--mint);
}

.chapter-summary p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink);
}

.home-chapter-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.home-chapter-item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
  background: var(--surface);
  color: var(--ink);
  text-align: left;
  transition: all 0.15s ease;
}

.home-chapter-item:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 14px rgba(79, 109, 245, 0.12);
  transform: translateY(-1px);
}

.home-chapter-item strong {
  font-size: 14px;
  line-height: 1.4;
}

.home-chapter-item .muted {
  font-size: 12px;
}

.home-chapter-num {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 800;
}

/* 聊天气泡内的 Markdown 元素 */
.chat-bubble h4 {
  margin: 8px 0 4px;
  font-size: 14.5px;
}

.chat-bubble ul {
  margin: 4px 0;
  padding-left: 20px;
}

.chat-bubble li {
  margin: 3px 0;
  line-height: 1.65;
}

.chat-bubble code {
  padding: 1px 5px;
  border-radius: 5px;
  background: rgba(79, 109, 245, 0.09);
  font-size: 0.9em;
}

.chat-bubble p {
  margin: 0;
  line-height: 1.7;
}