:root {
  --bg: #f6f7f4;
  --panel: #ffffff;
  --ink: #20231f;
  --muted: #676f66;
  --line: #dfe4dc;
  --soft: #eef2eb;
  --teal: #0f766e;
  --teal-dark: #0a4f4a;
  --red: #b42318;
  --amber: #a16207;
  --blue: #2454a6;
  --shadow: 0 10px 30px rgba(27, 31, 26, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
}

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

button {
  cursor: pointer;
}

.topbar {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.86);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 8px;
  font-weight: 800;
  background: #f3c846;
}

.brand h1 {
  margin: 0;
  font-size: 19px;
  line-height: 1.1;
}

.brand p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.top-actions,
.button-row,
.scene-nav,
.tabbar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(300px, 380px) minmax(440px, 1fr) minmax(300px, 390px);
  gap: 16px;
  padding: 16px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.input-panel,
.output-panel,
.preview-panel {
  padding: 16px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.section-head h2 {
  margin: 0;
  font-size: 16px;
}

.status-pill {
  min-height: 24px;
  padding: 3px 8px;
  border-radius: 999px;
  background: #fff4cf;
  color: #6b4b00;
  border: 1px solid #ebd88f;
  font-size: 12px;
  font-weight: 700;
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

label {
  display: grid;
  gap: 6px;
}

label span,
.textarea-label span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fbfcfa;
  color: var(--ink);
  outline: none;
}

input,
select {
  min-height: 38px;
  padding: 7px 9px;
}

textarea {
  padding: 10px;
  resize: vertical;
  line-height: 1.55;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.13);
}

.segmented {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin: 12px 0;
}

.segment {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--soft);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
}

.segment.active {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}

.upload-zone {
  min-height: 86px;
  border: 1px dashed #9aa69a;
  border-radius: 8px;
  background: #fbfcfa;
  display: grid;
  place-items: center;
  gap: 8px;
  margin: 8px 0 10px;
  color: var(--muted);
}

.upload-zone input {
  display: none;
}

.upload-zone svg {
  width: 24px;
  height: 24px;
  color: var(--teal);
}

.asset-strip {
  display: flex;
  gap: 8px;
  min-height: 64px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.asset-thumb {
  flex: 0 0 64px;
  width: 64px;
  height: 64px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--soft);
  overflow: hidden;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 11px;
}

.asset-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.textarea-label {
  margin-top: 10px;
}

.icon-button,
.square-button,
.tab {
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 11px;
  font-weight: 750;
  white-space: nowrap;
}

.icon-button svg,
.square-button svg {
  width: 17px;
  height: 17px;
}

.icon-button.primary {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}

.square-button {
  width: 36px;
  padding: 0;
}

.button-row {
  justify-content: flex-end;
  margin-top: 12px;
}

.tabbar {
  background: var(--soft);
  border: 1px solid var(--line);
  padding: 3px;
  border-radius: 7px;
}

.tab {
  min-height: 30px;
  padding: 0 10px;
  border-color: transparent;
  background: transparent;
  font-size: 12px;
}

.tab.active {
  background: #fff;
  border-color: var(--line);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}

.metric-row div {
  min-height: 62px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfa;
  padding: 10px;
}

.metric-row strong {
  display: block;
  font-size: 22px;
}

.metric-row span {
  color: var(--muted);
  font-size: 12px;
}

.script-list,
.timeline-list,
.module-list {
  display: grid;
  gap: 10px;
}

.scene-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fff;
}

.scene-card.active {
  border-color: var(--teal);
  box-shadow: inset 4px 0 0 var(--teal);
}

.scene-card header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.scene-card h3 {
  margin: 0;
  font-size: 14px;
}

.scene-card p {
  margin: 0;
  line-height: 1.65;
  color: #32372f;
}

.tagline {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
}

.timeline-ruler {
  height: 34px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  color: var(--muted);
  font-size: 11px;
  align-items: end;
  border-bottom: 1px solid var(--line);
  margin-bottom: 12px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 70px 1fr 80px;
  align-items: center;
  gap: 10px;
}

.timeline-label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.timeline-track {
  height: 30px;
  border-radius: 6px;
  background: var(--soft);
  overflow: hidden;
  border: 1px solid var(--line);
}

.timeline-bar {
  height: 100%;
  min-width: 8%;
  background: var(--teal);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  display: flex;
  align-items: center;
  padding-left: 8px;
}

.timeline-item:nth-child(2n) .timeline-bar {
  background: var(--blue);
}

.timeline-item:nth-child(3n) .timeline-bar {
  background: var(--amber);
}

.timeline-time {
  font-size: 12px;
  color: var(--muted);
  text-align: right;
}

.render-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) minmax(280px, 1.1fr);
  gap: 12px;
}

.render-grid h3 {
  margin: 0 0 10px;
  font-size: 14px;
}

.module-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 10px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: #fbfcfa;
}

.module-row strong {
  font-size: 13px;
}

.module-row span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.code-box {
  min-height: 430px;
  max-height: 520px;
  overflow: auto;
  margin: 0;
  padding: 12px;
  background: #1f241f;
  color: #e7f0df;
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.55;
}

.preview-panel {
  position: sticky;
  top: 92px;
}

.scene-nav span {
  min-width: 52px;
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.phone-frame {
  width: min(100%, 330px);
  margin: 0 auto;
  padding: 10px;
  border: 1px solid #c9d1c4;
  border-radius: 8px;
  background: #111412;
}

.video-stage {
  position: relative;
  aspect-ratio: 9 / 16;
  overflow: hidden;
  border-radius: 6px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(234, 238, 229, 0.88)),
    #e7ece4;
}

.stage-topline {
  position: absolute;
  top: 14px;
  left: 14px;
  right: 14px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  z-index: 4;
  color: #26302a;
  font-size: 11px;
  font-weight: 800;
}

.product-visual {
  position: absolute;
  left: 18px;
  right: 18px;
  top: 54px;
  height: 36%;
  border-radius: 8px;
  border: 1px solid rgba(28, 33, 28, 0.12);
  overflow: hidden;
  background: #fff;
  display: grid;
  place-items: center;
}

.product-visual img,
.product-visual video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.device-placeholder {
  width: 68%;
  height: 64%;
  border: 2px solid #252d27;
  border-radius: 28px;
  position: relative;
  background: #fafafa;
}

.device-placeholder::before,
.device-placeholder::after {
  content: "";
  position: absolute;
  width: 54px;
  height: 28px;
  border: 2px solid #252d27;
  border-radius: 50%;
  top: 40%;
}

.device-placeholder::before {
  left: 20%;
}

.device-placeholder::after {
  right: 20%;
}

.device-placeholder span {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #f3c846;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.host-slot {
  position: absolute;
  z-index: 5;
  display: grid;
  justify-items: center;
  align-content: end;
  gap: 4px;
  border: 1px dashed rgba(32, 35, 31, 0.35);
  background: rgba(255, 255, 255, 0.42);
  border-radius: 8px;
}

.host-slot.center {
  left: 34%;
  right: 34%;
  bottom: 22%;
  height: 25%;
}

.host-slot.left {
  left: 18px;
  width: 32%;
  bottom: 21%;
  height: 30%;
}

.host-slot.pip {
  right: 18px;
  bottom: 20%;
  width: 30%;
  height: 22%;
}

.host-slot.none {
  display: none;
}

.host-head {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #232922;
}

.host-body {
  width: 74%;
  height: 58px;
  border-radius: 26px 26px 8px 8px;
  background: #232922;
}

.info-card {
  position: absolute;
  z-index: 6;
  left: 18px;
  right: 18px;
  bottom: 92px;
  min-height: 88px;
  padding: 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(20, 25, 20, 0.12);
  display: grid;
  gap: 4px;
}

.info-card small {
  color: var(--teal);
  font-weight: 900;
}

.info-card strong {
  font-size: 17px;
  line-height: 1.25;
}

.info-card span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.subtitle-bar {
  position: absolute;
  z-index: 7;
  left: 14px;
  right: 14px;
  bottom: 18px;
  min-height: 52px;
  padding: 9px 11px;
  display: grid;
  place-items: center;
  text-align: center;
  border-radius: 8px;
  background: rgba(31, 36, 31, 0.88);
  color: #fff;
  font-size: 14px;
  line-height: 1.45;
  font-weight: 800;
}

.inspect-table {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.inspect-table div {
  display: grid;
  grid-template-columns: 70px 1fr;
  min-height: 36px;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.inspect-table span {
  color: var(--muted);
  font-size: 12px;
}

.inspect-table strong {
  font-size: 12px;
}

@media (max-width: 1180px) {
  .app-shell {
    grid-template-columns: minmax(320px, 420px) 1fr;
  }

  .preview-panel {
    grid-column: 1 / -1;
    position: static;
  }
}

@media (max-width: 820px) {
  .topbar,
  .app-shell {
    padding-left: 12px;
    padding-right: 12px;
  }

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

  .app-shell,
  .render-grid {
    grid-template-columns: 1fr;
  }

  .field-grid,
  .metric-row {
    grid-template-columns: 1fr;
  }

  .segmented {
    grid-template-columns: 1fr 1fr;
  }

  .brand p {
    display: none;
  }
}

.zhihu-search {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  margin-top: 10px;
}

.zhihu-search .textarea-label {
  flex: 1;
  margin-top: 0;
}

.zhihu-search .icon-button {
  flex-shrink: 0;
}

.zhihu-results {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
}

.zhihu-results:empty {
  display: none;
}

.zhihu-item {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--soft);
  padding: 7px 9px;
}

.zhihu-item-title a {
  color: var(--blue);
  font-weight: 700;
  text-decoration: none;
}

.zhihu-item-title a:hover {
  text-decoration: underline;
}

.zhihu-item-meta {
  margin-top: 3px;
  font-size: 12px;
  color: var(--muted);
}

.zhihu-hint {
  font-size: 13px;
  color: var(--muted);
  padding: 4px 2px;
}