:root {
  --ink: #153b52;
  --muted: #647684;
  --line: rgba(21, 59, 82, 0.13);
  --paper: rgba(255, 255, 252, 0.9);
  --blue: #2779a7;
  --teal: #1f7a70;
  --orange: #d97735;
  --red: #b94f43;
  --green: #4f7c56;
  --shadow: 0 18px 44px rgba(28, 50, 62, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(31, 122, 112, 0.12), transparent 28rem),
    radial-gradient(circle at 100% 8%, rgba(217, 119, 53, 0.14), transparent 26rem),
    #f1f0ec;
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

button { cursor: pointer; }

.topbar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 22px;
  align-items: start;
  max-width: 1580px;
  margin: 0 auto;
  padding: 24px 24px 10px;
}

.back-link, .ghost-button, .secondary-button, .primary-button, .status-chip, .logic-badge {
  border-radius: 999px;
}

.back-link {
  padding: 0.72rem 1rem;
  color: var(--ink);
  text-decoration: none;
  background: rgba(255,255,255,.72);
  border: 1px solid var(--line);
}

.title-block h1 { margin: 0; font-size: clamp(1.8rem, 4vw, 3rem); letter-spacing: -.045em; }
.title-block > p:last-child { max-width: 48rem; margin: 10px 0 0; color: var(--muted); line-height: 1.65; }
.eyebrow { margin: 0 0 6px; color: var(--orange); font-size: .75rem; letter-spacing: .13em; font-weight: 700; }
.status-chip { display: flex; align-items: center; gap: 8px; padding: .72rem 1rem; background: rgba(255,255,255,.72); border: 1px solid var(--line); font-size: .82rem; white-space: nowrap; }
.status-chip span { width: 9px; height: 9px; background: #43a36e; border-radius: 50%; box-shadow: 0 0 0 5px rgba(67,163,110,.12); }

.page-shell { max-width: 1580px; margin: 0 auto; padding: 14px 24px 48px; }
.panel, .mission-card { background: var(--paper); border: 1px solid var(--line); box-shadow: var(--shadow); backdrop-filter: blur(12px); }
.panel { border-radius: 22px; }

.mission-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: 20px 22px;
  margin-bottom: 18px;
  border-radius: 24px;
}

.mission-card h2, .panel h2 { margin: 0; letter-spacing: -.025em; }
.mission-card h2 { font-size: clamp(1.2rem, 2.4vw, 1.65rem); }
.mission-card > div > p:last-child { margin: 10px 0 0; color: var(--muted); line-height: 1.65; }
.mission-steps { display: flex; gap: 4px; margin: 0; padding: 0; list-style: none; }
.mission-steps li { display: grid; justify-items: center; gap: 5px; min-width: 62px; color: var(--muted); font-size: .77rem; position: relative; }
.mission-steps li:not(:last-child)::after { content: ""; position: absolute; top: 15px; right: -14px; width: 28px; height: 1px; background: var(--line); }
.mission-steps b { display: grid; place-items: center; width: 31px; height: 31px; border: 1px solid var(--line); border-radius: 50%; background: white; z-index: 1; }
.mission-steps li.active b { color: white; background: var(--ink); border-color: var(--ink); }

.workspace-grid { display: grid; grid-template-columns: minmax(290px, 360px) minmax(0, 1fr); gap: 18px; align-items: start; }
.control-panel { padding: 20px; position: sticky; top: 12px; }
.panel-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; }
.panel-heading.compact { align-items: center; }
.panel-heading h2 { font-size: 1.2rem; }

fieldset { margin: 18px 0 0; padding: 16px 0 0; border: 0; border-top: 1px solid var(--line); }
legend { padding: 0; font-weight: 700; }
label { display: grid; gap: 7px; margin-top: 12px; color: var(--muted); font-size: .83rem; }
.input-grid { display: grid; gap: 10px; }
.input-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
input[type="number"], select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 11px;
  color: var(--ink);
  background: rgba(255,255,255,.82);
  padding: .72rem .75rem;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: rgba(39,121,167,.6); box-shadow: 0 0 0 3px rgba(39,121,167,.1); }
.range-label { grid-template-columns: 1fr auto; align-items: center; }
.range-label input { grid-column: 1 / -1; width: 100%; accent-color: var(--teal); }
.range-label strong { color: var(--ink); }

.control-actions, .audio-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; }
.primary-button, .secondary-button, .ghost-button { border: 1px solid var(--line); padding: .72rem 1rem; transition: transform .15s ease, box-shadow .15s ease; }
.primary-button { color: white; background: var(--ink); border-color: var(--ink); }
.secondary-button { color: var(--ink); background: white; }
.ghost-button { color: var(--muted); background: rgba(255,255,255,.5); }
.primary-button:hover, .secondary-button:hover, .ghost-button:hover { transform: translateY(-1px); box-shadow: 0 10px 20px rgba(21,59,82,.1); }
button:disabled { opacity: .45; cursor: not-allowed; transform: none !important; box-shadow: none !important; }
.data-notice { margin: 14px 0 0; padding: 10px 11px; border-radius: 12px; color: #785025; background: rgba(217,119,53,.1); font-size: .75rem; line-height: 1.5; }

.results-stack { display: grid; gap: 18px; }
.summary-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 12px; }
.metric-card { padding: 17px; min-height: 126px; }
.metric-card span, .metric-card small { display: block; color: var(--muted); }
.metric-card span { font-size: .78rem; }
.metric-card strong { display: block; margin: 12px 0 7px; font-size: clamp(1.3rem, 2.5vw, 2rem); }
.metric-card small { font-size: .72rem; line-height: 1.45; }
.metric-card.accent { color: white; background: linear-gradient(145deg, #153b52, #245f75); }
.metric-card.accent span, .metric-card.accent small { color: rgba(255,255,255,.72); }
.metric-card.accent.status-warn { background: linear-gradient(145deg, #9b5428, #d1783d); }
.metric-card.accent.status-good { background: linear-gradient(145deg, #356a50, #568b61); }

.visual-panel, .breakdown-panel, .tutor-card, .optimizer-card, .compare-panel, .audio-panel, .limitations { padding: 20px; }
.chart-legend { display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: .78rem; }
.chart-legend span { width: 12px; height: 12px; border-radius: 3px; }
.empty-key { background: var(--blue); }
.occupied-key { background: var(--orange); margin-left: 7px; }
.rt-chart { display: grid; grid-template-columns: repeat(6, minmax(50px,1fr)); gap: 12px; align-items: end; min-height: 275px; margin-top: 18px; padding: 28px 12px 8px; border-radius: 16px; background: linear-gradient(to top, rgba(21,59,82,.055) 1px, transparent 1px); background-size: 100% 25%; }
.band-column { display: grid; grid-template-rows: 210px auto; gap: 7px; min-width: 0; }
.bar-stage { display: flex; align-items: end; justify-content: center; gap: 4px; height: 210px; position: relative; border-bottom: 1px solid var(--line); }
.rt-bar { width: min(29px, 36%); min-height: 3px; border-radius: 6px 6px 0 0; position: relative; transition: height .25s ease; }
.rt-bar.empty { background: var(--blue); }
.rt-bar.occupied { background: var(--orange); }
.rt-bar span { position: absolute; top: -18px; left: 50%; transform: translateX(-50%); font-size: .67rem; white-space: nowrap; color: var(--ink); }
.target-line { position: absolute; left: 0; right: 0; height: 1px; border-top: 2px dashed rgba(79,124,86,.72); pointer-events: none; }
.target-line::after { content: "参考"; position: absolute; right: 0; top: -16px; color: var(--green); font-size: .6rem; }
.band-label { text-align: center; color: var(--muted); font-size: .72rem; }
.chart-note { margin: 13px 0 0; color: var(--muted); font-size: .77rem; line-height: 1.55; }

.diagnosis-grid, .compare-audio-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
.logic-badge { padding: .4rem .65rem; color: var(--teal); background: rgba(31,122,112,.1); font-size: .67rem; white-space: nowrap; }
.logic-badge.orange { color: #9b5428; background: rgba(217,119,53,.12); }
.tutor-lead { margin: 17px 0 8px; font-weight: 700; line-height: 1.5; }
.tutor-card ul { margin: 8px 0 0; padding-left: 1.15rem; color: var(--muted); line-height: 1.65; font-size: .84rem; }
.optimizer-card > p { color: var(--muted); line-height: 1.6; }
.optimizer-card > small { display: block; margin-top: 11px; color: var(--muted); line-height: 1.5; }
.suggestion-box { min-height: 70px; padding: 12px; border-radius: 14px; background: rgba(217,119,53,.08); }
.suggestion-box strong { display: block; margin-bottom: 5px; }
.suggestion-box span { color: var(--muted); font-size: .8rem; line-height: 1.5; }

.breakdown-panel { min-height: 180px; }
.breakdown-bars { display: grid; gap: 11px; margin-top: 16px; }
.breakdown-row { display: grid; grid-template-columns: 5.7rem minmax(0,1fr) 4.5rem; gap: 10px; align-items: center; font-size: .75rem; }
.breakdown-track { height: 11px; overflow: hidden; border-radius: 999px; background: rgba(21,59,82,.08); }
.breakdown-track span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--teal), var(--blue)); }
.breakdown-value { text-align: right; color: var(--muted); }

.compare-audio-grid { margin-top: 18px; align-items: start; }
.compare-empty { margin-top: 18px; padding: 24px; text-align: center; color: var(--muted); border: 1px dashed var(--line); border-radius: 15px; }
.hidden { display: none !important; }
.method-note { margin-top: 18px; padding: 14px 18px; }
.method-note summary { color: var(--teal); font-weight: 700; }
.method-note p { margin: 10px 0 0; color: var(--muted); font-size: .82rem; line-height: 1.65; }
.comparison-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 16px; }
.comparison-card { padding: 13px; border-radius: 14px; background: rgba(21,59,82,.05); }
.comparison-card b, .comparison-card strong { display: block; }
.comparison-card strong { margin-top: 7px; font-size: 1.35rem; }
.comparison-card small { color: var(--muted); }
.delta-good { color: var(--green); }
.delta-warn { color: var(--orange); }
.reflection-label { margin-top: 16px; }
.reflection-feedback { min-height: 22px; margin: 10px 0; color: var(--muted); font-size: .8rem; line-height: 1.5; }
.reflection-feedback.good { color: var(--green); }
.reflection-feedback.warn { color: var(--orange); }

.audio-panel > p { color: var(--muted); line-height: 1.6; }
.file-picker { display: inline-flex; padding: .75rem 1rem; color: var(--ink); background: white; border: 1px solid var(--line); border-radius: 12px; cursor: pointer; }
.file-picker input { display: none; }
.audio-file-name, .audio-status { font-size: .78rem; }
.audio-status { padding: 10px 12px; border-radius: 12px; background: rgba(39,121,167,.08); }

.limitations { margin-top: 18px; }
.limitations-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 12px; margin-top: 15px; }
.limitations-grid p { margin: 0; padding: 13px; color: var(--muted); background: rgba(21,59,82,.045); border-radius: 13px; font-size: .8rem; line-height: 1.6; }
.limitations-grid b { color: var(--ink); }

@media (max-width: 1150px) {
  .workspace-grid { grid-template-columns: 1fr; }
  .control-panel { position: static; }
  .summary-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .limitations-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 760px) {
  .topbar { grid-template-columns: 1fr; padding: 16px 14px 8px; }
  .back-link { width: max-content; }
  .status-chip { width: max-content; }
  .page-shell { padding: 10px 14px 34px; }
  .mission-card { grid-template-columns: 1fr; }
  .mission-steps { justify-content: space-between; }
  .mission-steps li { min-width: 50px; }
  .diagnosis-grid, .compare-audio-grid { grid-template-columns: 1fr; }
  .rt-chart { gap: 5px; padding-left: 2px; padding-right: 2px; min-height: 245px; }
  .band-column { grid-template-rows: 180px auto; }
  .bar-stage { height: 180px; }
  .rt-bar span { font-size: .6rem; transform: translateX(-50%) rotate(-55deg); transform-origin: center; top: -22px; }
  .limitations-grid { grid-template-columns: 1fr; }
}

@media (max-width: 470px) {
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .metric-card { min-height: 116px; padding: 14px; }
  .input-grid.three { grid-template-columns: 1fr; }
  .control-actions > button, .audio-actions > button { flex: 1 1 auto; }
  .comparison-cards { grid-template-columns: 1fr; }
}