:root{
  --topbar: #7fe6ff;  
  --text: #222;
  --muted: #666;
  --line: #b9b9b9;
  --accent: #55d6ff; 
}

*{ box-sizing: border-box; }
html, body{ margin: 0; padding: 0; }
body{
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: #fff;
}

.topbar{
  background: var(--topbar);
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.topbar-inner{
  font-size: 18px;    
  font-weight: 700;   
  letter-spacing: 0.5px;
}

.page{
  width: min(1200px, 94%);
  margin: 0 auto;
  padding: 64px 0;
}

/* About title like screenshot: centered, small underline */
.section-title{
  text-align: center;
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 22px 0;
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
}
.section-title::after{
  content: "";
  display: block;
  width: 42px;
  height: 3px;
  background: var(--accent);
  margin: 8px auto 0;
  border-radius: 999px;
}

.about-row{
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 26px;
  margin-top: 10px;
}

.avatar-wrap{
  width: 200px;
  height: 200px;
  border-radius: 999px;
  border: 3px solid var(--accent);
  padding: 4px;
  flex: 0 0 auto;
}
.avatar{
  width: 100%;
  height: 100%;
  border-radius: 999px;
  object-fit: cover;
  display: block;
}

.about-text{
  max-width: 520px;
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
}
.about-text p{
  margin: 0 0 10px 0;
}


/* Labs section */
.section-subtitle{
  margin: 6px 0 18px 0;
  color: var(--muted);
  line-height: 1.6;
}

.labs{
  margin-top: 28px;
  padding-bottom: 36px;
  border-top: 1px solid var(--line);
  padding-top: 26px;
}

.lab-grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.lab-card{
  display: block;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 16px 14px 16px;
  background: #fff;
  transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
}

.lab-card:hover{
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 8px 22px rgba(0,0,0,0.08);
}

.lab-card-top{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.lab-tag{
  display: inline-block;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
}

.lab-status{
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  white-space: nowrap;
}

.lab-status.in-progress{
  border-color: var(--accent);
  color: #0b6476;
  background: rgba(127,230,255,0.25);
}

.lab-status.coming-soon{
  background: rgba(0,0,0,0.03);
}

.lab-title{
  margin: 0 0 6px 0;
  font-size: 18px;
}

.lab-desc{
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: 14px;
}

/* Responsive labs grid */
@media (max-width: 980px){
  .lab-grid{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px){
  .lab-grid{ grid-template-columns: 1fr; }
}


/* Lab report pages */
.breadcrumbs{
  margin: 0 0 18px 0;
  color: var(--muted);
  font-size: 14px;
}
.breadcrumbs a{
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(0,0,0,0.15);
}
.breadcrumbs a:hover{
  border-bottom-color: var(--accent);
}

.report{
  border-top: 1px solid var(--line);
  padding-top: 18px;
  margin-top: 10px;
}

.report h1{
  margin: 0 0 8px 0;
  font-size: 30px;
}

.report-meta{
  margin: 0 0 18px 0;
  color: var(--muted);
  font-size: 14px;
}

.report-section{
  margin: 18px 0;
}
.report-section h2{
  margin: 0 0 12px 0;
  font-size: 22px;
}

.report-section h3{
  margin: 22px 0 10px 0;
  font-size: 20px;
  font-weight: 600;
}

.report-section p{
  margin: 0 0 14px 0;
  color: var(--text);
  font-size: 18px;
  line-height: 1.8;
}
.report-section ul{
  margin: 0 0 14px 20px;
  color: var(--text);
  font-size: 18px;
  line-height: 1.8;
}
.codeblock{
  background: rgba(0,0,0,0.04);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 13px;
  line-height: 1.55;
}

/* Mobile */
@media (max-width: 640px){
  .about-row{
    flex-direction: column;
    text-align: center;
  }
  .about-text{ max-width: 520px; }
}

/* ===== Vertical image layout for lab reports ===== */

.img-vert{
  display: block;
  width: min(900px, 100%);
  margin: 18px auto;     /* 上下留白，居中 */
  height: auto;          /* 不裁切、不变形 */
  border-radius: 14px;
  box-shadow: 0 10px 28px rgba(0,0,0,0.10);
}
.img-tiny{ width: min(360px, 100%); }
.img-small{ width: min(520px, 100%); }
.img-mid{   width: min(760px, 100%); }
.img-large{   width: min(1080px, 100%); }

/* Lab media helpers */
.media{margin:14px 0;}
.media img{max-width:100%;height:auto;border-radius:12px;box-shadow:0 8px 24px rgba(0,0,0,.08);}
.video{width:100%;aspect-ratio:16/9;border-radius:12px;box-shadow:0 8px 24px rgba(0,0,0,.08);}