/* LADss — 基础样式表 / 无外部依赖（字体、脚本均为本地或系统资源），适配国内网络与 ICP 备案站点 */

:root {
  --paper: #f3ece3;
  --paper-2: #ece2d5;
  --ink: #1b1613;
  --ink-2: #5b4636;
  --brown: #6b3a12;
  --line: rgba(27, 22, 19, 0.16);
  --maxw: 1080px;
  --gutter: clamp(20px, 5vw, 56px);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- 顶部导航 ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(243, 236, 227, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-head .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img { height: 26px; width: auto; }
.brand span {
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.nav { display: flex; gap: clamp(14px, 3vw, 30px); }
.nav a {
  text-decoration: none;
  font-size: 14px;
  color: var(--ink-2);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--ink); }

/* ---------- 通用排版 ---------- */
section { padding: clamp(56px, 9vw, 104px) 0; border-top: 1px solid var(--line); }
section:first-of-type { border-top: 0; }

.eyebrow {
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin: 0 0 18px;
}
h1, h2, h3 { font-weight: 600; line-height: 1.28; margin: 0 0 20px; letter-spacing: 0.01em; }
h1 { font-size: clamp(32px, 6.4vw, 60px); }
h2 { font-size: clamp(24px, 3.6vw, 36px); }
h3 { font-size: 18px; margin-bottom: 10px; }
p { margin: 0 0 18px; max-width: 62ch; color: var(--ink-2); }
p.lead { font-size: clamp(17px, 2.1vw, 20px); color: var(--ink); }

/* ---------- 首屏 ---------- */
.hero { padding-top: clamp(48px, 7vw, 88px); }
.hero-logo { width: min(300px, 60vw); margin-bottom: 32px; }
.hero .slogan {
  font-size: clamp(15px, 2.2vw, 18px);
  letter-spacing: 0.16em;
  color: var(--brown);
  margin-bottom: 26px;
}
.hero-figure { margin: clamp(36px, 6vw, 64px) 0 0; }
.hero-figure img { width: 100%; height: clamp(260px, 46vw, 520px); object-fit: cover; border-radius: 2px; }
figcaption { font-size: 13px; color: var(--ink-2); margin-top: 10px; }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.btn {
  display: inline-block;
  padding: 11px 22px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  text-decoration: none;
  font-size: 14px;
  transition: background .18s ease, color .18s ease;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.ghost { border-color: var(--line); color: var(--ink-2); }
.btn.ghost:hover { background: var(--ink-2); color: var(--paper); border-color: var(--ink-2); }

/* ---------- 栅格 ---------- */
.grid { display: grid; gap: clamp(20px, 3vw, 34px); }
.grid.cols-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }

.card { border-top: 1px solid var(--ink); padding-top: 16px; }
.card .num { font-size: 12px; letter-spacing: 0.2em; color: var(--brown); }
.card p { font-size: 14.5px; margin-bottom: 0; }

/* ---------- 信息表 ---------- */
.facts { border-top: 1px solid var(--line); margin-top: 8px; }
.facts div {
  display: grid;
  grid-template-columns: minmax(96px, 160px) 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}
.facts dt, .facts .k { color: var(--ink-2); font-size: 13px; letter-spacing: 0.08em; }
.facts .v { margin: 0; color: var(--ink); max-width: none; }

/* ---------- 图集 ---------- */
.gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 14px; }
.gallery figure { margin: 0; }
.gallery img { width: 100%; height: clamp(200px, 26vw, 300px); object-fit: cover; border-radius: 2px; }

/* ---------- 二维码 ---------- */
.qr-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: clamp(20px, 4vw, 40px); }
.qr { text-align: center; }
.qr img {
  width: min(220px, 62vw);
  height: min(220px, 62vw);
  object-fit: contain;
  margin: 0 auto 14px;
  background: #fff;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
}
.qr h3 { margin-bottom: 4px; }
.qr p { font-size: 14px; margin: 0 auto; max-width: 30ch; }

/* ---------- 页脚 ---------- */
.site-foot {
  border-top: 1px solid var(--line);
  background: var(--paper-2);
  padding: 44px 0 56px;
  font-size: 13px;
  color: var(--ink-2);
}
.site-foot .wrap { display: grid; gap: 18px; }
.site-foot a { text-decoration: none; border-bottom: 1px solid var(--line); }
.site-foot a:hover { color: var(--ink); }
.foot-top { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: center; justify-content: space-between; }
.beian { display: flex; flex-wrap: wrap; gap: 6px 18px; }

@media (max-width: 560px) {
  .site-head .wrap { min-height: 56px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
  .facts div { grid-template-columns: 1fr; gap: 4px; }
}

/* ---------- 支持方 ---------- */
.support {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 26px 0 0;
  padding: 8px 16px 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--ink-2);
  background: rgba(255, 255, 255, 0.4);
}
.support b { font-weight: 600; color: var(--ink); letter-spacing: 0.04em; }
.support .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--brown); flex: none; }

.support-band { border-top: 1px solid var(--line); background: var(--paper-2); }
.support-band .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 20px;
  padding-top: 26px;
  padding-bottom: 26px;
  font-size: 14px;
  color: var(--ink-2);
}
.support-band .label {
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}
.support-band strong { font-size: 18px; letter-spacing: 0.04em; color: var(--ink); font-weight: 600; }

/* ---------- 与 247Lab 主站的衔接（沿用既有样式，不改动 LADss 视觉体系） ---------- */
.nav a.up::after {
  content: "↗";
  font-size: 11px;
  margin-left: 4px;
  opacity: 0.55;
}

a.support { text-decoration: none; }
a.support:hover {
  background: rgba(255, 255, 255, 0.75);
  border-color: rgba(27, 22, 19, 0.32);
}

.support-band a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.support-band a:hover { color: var(--ink); border-bottom-color: var(--ink); }
.support-band strong a { border-bottom-color: rgba(27, 22, 19, 0.35); }

/* ---------- 主站条：LADss 隶属新研科技 ---------- */
.parent-bar {
  background: #1b1613;
  color: rgba(243, 236, 227, 0.72);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.parent-bar .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 36px;
}
.parent-bar a { color: inherit; text-decoration: none; }
.parent-bar a:hover { color: #fff; }
.parent-bar b { font-weight: 600; color: #f3ece3; letter-spacing: 0.14em; }
.parent-bar .sep { margin: 0 8px; opacity: 0.45; }
.parent-bar .back::after { content: " ↗"; opacity: 0.6; }

/* ---------- 核心领域：仅关键词 ---------- */
.keyword-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 5vw, 56px);
  align-items: baseline;
}
.keyword-row li {
  font-size: clamp(26px, 4.6vw, 44px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.04em;
  color: var(--ink);
}

/* ---------- 图集：拼贴 ---------- */
.collage {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-auto-rows: clamp(70px, 8.4vw, 108px);
  gap: 10px;
  margin-top: 28px;
}
.collage figure { margin: 0; overflow: hidden; border-radius: 2px; }
.collage img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* 横幅照片占 4 列，竖幅占 2 列，避免裁切 */
.collage .c1 { grid-column: span 4; grid-row: span 3; }
.collage .c2 { grid-column: span 2; grid-row: span 3; }
.collage .c3 { grid-column: span 2; grid-row: span 3; }
.collage .c4 { grid-column: span 4; grid-row: span 3; }
.collage .c5 { grid-column: span 2; grid-row: span 3; }
.collage .c6 { grid-column: span 4; grid-row: span 3; }

.collage-sm { grid-auto-rows: clamp(66px, 7.6vw, 96px); }
.collage-sm .c1 { grid-column: span 4; grid-row: span 2; }
.collage-sm .c2 { grid-column: span 2; grid-row: span 2; }
.collage-sm .c3 { grid-column: span 6; grid-row: span 2; }

@media (max-width: 620px) {
  .collage { grid-template-columns: repeat(4, 1fr); grid-auto-rows: 72px; gap: 8px; }
  .collage .c1 { grid-column: span 4; grid-row: span 3; }
  .collage .c2 { grid-column: span 2; grid-row: span 3; }
  .collage .c3 { grid-column: span 2; grid-row: span 3; }
  .collage .c4 { grid-column: span 4; grid-row: span 3; }
  .collage .c5 { grid-column: span 2; grid-row: span 3; }
  .collage .c6 { grid-column: span 2; grid-row: span 3; }
  .collage-sm .c1 { grid-column: span 4; grid-row: span 2; }
  .collage-sm .c2 { grid-column: span 2; grid-row: span 2; }
  .collage-sm .c3 { grid-column: span 4; grid-row: span 2; }
}