/* 积木 LIMS — one stylesheet for the home page and the standard information pages. */
:root {
  --green: #37c186;
  --green-ink: #1f8a5b;
  --green-tint: #eaf8f1;
  --ink: #142019;
  --ink-2: #4a5a52;
  --ink-3: #7d8a83;
  --line: #e3e9e6;
  --paper: #ffffff;
  --paper-2: #f5f8f6;
  --wrap: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--paper); line-height: 1.75; font-size: 16px; }
a { color: var(--green-ink); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(30px, 5vw, 50px); font-weight: 800; }
h2 { font-size: clamp(24px, 3.2vw, 34px); font-weight: 750; }
h3 { font-size: 18px; font-weight: 700; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

.top { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 750; font-size: 18px; }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; }
.top nav { display: flex; gap: 22px; font-size: 15px; }
.top nav a { color: var(--ink-2); }
.btn { display: inline-flex; align-items: center; gap: 8px; height: 44px; padding: 0 20px; border-radius: 8px; font-weight: 650; font-size: 15px; border: 1px solid transparent; cursor: pointer; }
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-ink); }
.btn-line { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-sm { height: 36px; padding: 0 14px; font-size: 14px; }

.hero { padding: 76px 0 64px; background: linear-gradient(180deg, var(--green-tint), #fff); }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 650; color: var(--green-ink); letter-spacing: .06em; margin-bottom: 14px; }
.lead { font-size: clamp(17px, 2vw, 19px); color: var(--ink-2); max-width: 700px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }

.section { padding: 64px 0; }
.section.alt { background: var(--paper-2); }
.section-head { max-width: 720px; margin-bottom: 30px; }
.section-head p { color: var(--ink-2); }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 20px; }
.card p { color: var(--ink-2); font-size: 15px; margin: 0; }
.card .tag { display: inline-block; font-size: 12px; font-weight: 650; color: var(--green-ink); background: var(--green-tint); border-radius: 4px; padding: 1px 8px; margin-bottom: 10px; }
.three { display: grid; gap: 28px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.three .n { font-size: 13px; font-weight: 700; color: var(--green-ink); letter-spacing: .1em; }
.three p { color: var(--ink-2); }
.modules { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.modules div { background: #fff; padding: 16px 18px; }
.modules b { display: block; font-size: 15px; margin-bottom: 2px; }
.modules span { font-size: 14px; color: var(--ink-3); }
.note { font-size: 14px; color: var(--ink-3); }

.contact { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); align-items: start; }
.contact .big { font-size: 26px; font-weight: 750; color: var(--ink); letter-spacing: .02em; }
.foot { border-top: 1px solid var(--line); padding: 26px 0; font-size: 13px; color: var(--ink-3); }
.foot .wrap { display: flex; flex-wrap: wrap; gap: 8px 22px; justify-content: space-between; }
.foot a { color: var(--ink-3); }

/* Standard information pages (/article/...) */
.std { padding: 48px 0 64px; }
.std-card { max-width: 760px; border: 1px solid var(--line); border-radius: 12px; padding: 28px; }
.std-code { font-size: clamp(24px, 4vw, 34px); font-weight: 800; margin: 0 0 6px; word-break: break-word; }
.std-title { font-size: 18px; font-weight: 650; margin: 0 0 4px; }
.std-en { color: var(--ink-2); margin: 0 0 18px; }
.std-meta { display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; margin: 0 0 20px; font-size: 15px; }
.std-meta dt { color: var(--ink-3); }
.std-meta dd { margin: 0; }
.std-note { font-size: 14px; color: var(--ink-3); background: var(--paper-2); border-radius: 8px; padding: 12px 14px; margin: 0; }
.std-cta { max-width: 760px; margin-top: 22px; display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px; }
.std-cta p { margin: 0; color: var(--ink-2); }

@media (max-width: 640px) {
  .top nav { display: none; }
  .hero { padding: 52px 0 44px; }
  .section { padding: 48px 0; }
  .std-card { padding: 20px; }
}