.tool-hero {
  text-align: center;
  padding: 2.2rem 0 1rem;
}
.tool-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0 0 0.75rem;
  background: var(--grad-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.tool-hero p {
  color: var(--text-color);
  opacity: 0.9;
  margin: 0;
}
.tool-shell {
  max-width: 1100px;
  margin: 0 auto;
  background: var(--card-bg);
  border: 1px solid var(--header-border);
  border-radius: 16px;
  padding: 28px 28px 20px;
  backdrop-filter: blur(8px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
}
.upload-box {
  text-align: center;
  margin-bottom: 20px;
}
.upload-box input[type="file"] {
  display: none;
}
.file-name {
  display: block;
  margin-top: 10px;
  color: var(--text-color);
  font-size: 0.95rem;
}
.btn-group {
  display: flex;
  gap: 12px;
  margin: 16px 0;
  flex-wrap: wrap;
}
.btn-run {
  padding: 10px 28px;
  background: linear-gradient(135deg, #79627a, #9c5b5b);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: opacity 0.2s;
}
.btn-run:hover {
  opacity: 0.88;
}
.btn-run:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.btn-clear {
  padding: 10px 28px;
  background: transparent;
  color: var(--text-color);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-clear:hover {
  background: var(--hover);
}
#status {
  margin-top: 12px;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.92rem;
  display: none;
}
#status.info {
  display: block;
  background: rgba(121, 98, 122, 0.12);
  color: #79627a;
}
#status.err {
  display: block;
  background: rgba(220, 53, 69, 0.12);
  color: #dc3545;
}
.hint {
  margin-top: 12px;
  padding: 10px 14px;
  background: rgba(0, 0, 0, 0.03);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--footer-text);
  line-height: 1.6;
}
[data-theme="dark"] .hint {
  background: rgba(255, 255, 255, 0.04);
}

/* 结果区域 */
.result-section {
  margin-top: 24px;
}
.result-section h2 {
  font-size: 1.3rem;
  margin-bottom: 16px;
  background: var(--grad-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.comment-summary {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.summary-card {
  flex: 1;
  min-width: 140px;
  padding: 16px;
  background: var(--card-bg);
  border: 1px solid var(--header-border);
  border-radius: 12px;
  text-align: center;
  backdrop-filter: blur(4px);
}
.summary-card .num {
  font-size: 2rem;
  font-weight: 700;
  color: #79627a;
}
.summary-card .label {
  font-size: 0.85rem;
  color: var(--footer-text);
  margin-top: 4px;
}

.chart-card {
  margin-bottom: 24px;
  padding: 16px;
  background: var(--card-bg);
  border: 1px solid var(--header-border);
  border-radius: 12px;
  backdrop-filter: blur(4px);
}
.chart-card h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  color: var(--text-color);
}
.chart-box {
  width: 100%;
  height: 340px;
}

/* 批注列表 */
.comment-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 8px;
}
.comment-card {
  border: 1px solid var(--header-border);
  border-radius: 12px;
  background: var(--card-bg);
  backdrop-filter: blur(4px);
  overflow: hidden;
}
.comment-card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 10px 16px;
  background: rgba(121, 98, 122, 0.08);
  border-bottom: 1px solid var(--header-border);
}
.comment-author {
  font-weight: 600;
}
.comment-date {
  font-size: 0.82rem;
  color: var(--footer-text);
}
.comment-id-badge {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--footer-text);
  background: rgba(121, 98, 122, 0.12);
  padding: 2px 10px;
  border-radius: 20px;
}
.comment-body {
  padding: 12px 16px;
}
.comment-text {
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.6;
  color: var(--text-color);
}
.comment-anchor {
  margin-top: 10px;
  padding: 8px 12px;
  background: rgba(0, 0, 0, 0.03);
  border-left: 3px solid #79627a;
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--footer-text);
  word-break: break-word;
}
[data-theme="dark"] .comment-anchor {
  background: rgba(255, 255, 255, 0.04);
}
.comment-anchor .anchor-label {
  display: block;
  margin-bottom: 4px;
  font-size: 0.75rem;
}
.no-comment {
  padding: 24px;
  text-align: center;
  color: var(--footer-text);
}