/* ===========================================================
   广东龙晟环保科技有限公司 · 官网 方案D「杂志编辑风」
   设计基调：纸感 / 衬线 / 直角 / 编辑排版 · 高端画册感
   与 A/B/C 的差异：无卡片圆角、无阴影、无分栏 Hero，
   采用全宽超大标题 + 编号索引 + 墨黑横带 + 手风琴服务
   =========================================================== */

:root {
  --paper: #faf8f4;
  --paper-2: #f2efe8;
  --ink: #16150f;
  --ink-2: #4a473d;
  --muted: #6b6659;          /* 对比度 5.39:1 on 纸色（原 #8a8577 仅 3.47，不达 WCAG AA） */
  --line: #d9d3c6;
  --line-strong: #16150f;
  --accent: #c8401c;
  --accent-2: #8f2c10;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --maxw: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--font-sans); line-height: 1.75; font-size: 16px;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; font-family: var(--font-serif); font-weight: 700; line-height: 1.18; letter-spacing: -.01em; }
p { margin: 0; }
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

/* ---------- 顶部细条 ---------- */
.topbar { background: var(--ink); color: #cfc9ba; font-size: 12.5px; letter-spacing: .3px; }
/* min-height 而非固定 height：窄屏文字换行时不会被裁切 */
.topbar .wrap { display: flex; justify-content: space-between; align-items: center; min-height: 38px; gap: 20px; padding-top: 4px; padding-bottom: 4px; }
.topbar b { color: #fff; font-weight: 600; }
.topbar .r { display: flex; gap: 22px; }
@media (max-width: 980px) { .topbar .r { display: none; } }
@media (max-width: 640px) { .topbar { font-size: 12px; } .topbar .wrap { line-height: 1.45; } }

/* ---------- 导航 ---------- */
.nav-bar { border-bottom: 1px solid var(--line-strong); position: sticky; top: 0; z-index: 90; background: rgba(250, 248, 244, .94); backdrop-filter: blur(10px); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 84px; }
.logo { display: flex; align-items: baseline; gap: 12px; }
.logo .zh { font-family: var(--font-serif); font-size: 25px; font-weight: 700; letter-spacing: .02em; }
.logo .en { font-size: 10.5px; letter-spacing: 2.4px; text-transform: uppercase; color: var(--muted); }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { font-size: 14.5px; font-weight: 500; color: var(--ink-2); position: relative; padding: 6px 0; transition: color .2s; }
.nav-links a .no { font-size: 10px; color: var(--accent); margin-right: 4px; font-weight: 700; vertical-align: super; }
.nav-links a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px; background: var(--ink); transition: right .3s; }
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after, .nav-links a.active::after { right: 0; }
.nav-links a.active { color: var(--ink); }
.nav-cta { padding: 11px 22px !important; background: var(--accent); color: #fff !important; font-weight: 600; }
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--accent-2); color: #fff !important; }
.burger { display: none; background: none; border: 1px solid var(--line-strong); padding: 10px 12px; cursor: pointer; }
.burger i { display: block; width: 20px; height: 1.5px; background: var(--ink); margin: 4px 0; }
@media (max-width: 900px) {
  .nav-links { display: none; position: absolute; top: 84px; left: 0; right: 0; background: var(--paper); border-bottom: 1px solid var(--line-strong); flex-direction: column; align-items: stretch; gap: 0; padding: 8px 32px 20px; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-cta { margin-top: 12px; text-align: center; }
  .burger { display: block; }
}

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 15px 30px; font-size: 14.5px; font-weight: 600; border: 1px solid var(--ink); transition: .25s; cursor: pointer; font-family: inherit; }
.btn-fill { background: var(--ink); color: var(--paper); }
.btn-fill:hover { background: var(--accent); border-color: var(--accent); }
.btn-line { background: transparent; color: var(--ink); }
.btn-line:hover { background: var(--ink); color: var(--paper); }
.btn-accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-2); border-color: var(--accent-2); }

/* ---------- 编辑式 Hero ---------- */
.hero-edit { padding: 84px 0 0; border-bottom: 1px solid var(--line-strong); }
.hero-top { display: grid; grid-template-columns: 1.35fr 1fr; gap: 56px; align-items: end; padding-bottom: 56px; }
.hero-edit h1 {
  font-size: clamp(44px, 8.2vw, 108px); line-height: 1.02; letter-spacing: -.03em; font-weight: 700;
}
.hero-edit h1 em { font-style: normal; color: var(--accent); }
.hero-aside { padding-bottom: 12px; }
.hero-aside .lead { font-size: 16.5px; color: var(--ink-2); line-height: 1.85; }
.hero-aside .actions { margin-top: 28px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-index { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.hero-index .cell { padding: 30px 26px 34px 0; border-right: 1px solid var(--line); }
.hero-index .cell:last-child { border-right: 0; }
.hero-index .k { font-family: var(--font-serif); font-size: 34px; line-height: 1; }
.hero-index .k small { font-size: .45em; color: var(--accent); font-family: var(--font-sans); font-weight: 700; }
.hero-index .l { margin-top: 12px; font-size: 13.5px; color: var(--muted); letter-spacing: .3px; }
@media (max-width: 900px) {
  .hero-top { grid-template-columns: 1fr; gap: 30px; align-items: start; }
  .hero-index { grid-template-columns: repeat(2, 1fr); }
  .hero-index .cell:nth-child(2) { border-right: 0; }
  .hero-index .cell:nth-child(1), .hero-index .cell:nth-child(2) { border-bottom: 1px solid var(--line); }
}

/* ---------- 滚动字幕 ---------- */
.marquee { background: var(--ink); color: var(--paper); overflow: hidden; padding: 20px 0; }
.marquee-track { display: flex; gap: 0; width: max-content; animation: slide 34s linear infinite; }
.marquee-track span { font-family: var(--font-serif); font-size: 22px; padding: 0 34px; white-space: nowrap; display: inline-flex; align-items: center; gap: 34px; }
.marquee-track span::after { content: "◆"; font-size: 11px; color: var(--accent); }
@keyframes slide { to { transform: translateX(-50%); } }

/* ---------- 章节 ---------- */
.section { padding: 96px 0; }
.sec-head { display: grid; grid-template-columns: 240px 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid var(--line-strong); margin-bottom: 0; }
.sec-head .no { font-size: 12px; letter-spacing: 2.5px; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.sec-head h2 { font-size: clamp(28px, 4vw, 46px); }
.sec-head .sub { margin-top: 14px; color: var(--ink-2); max-width: 620px; font-size: 16px; }
@media (max-width: 800px) { .sec-head { grid-template-columns: 1fr; gap: 14px; } }

/* ---------- 编号索引列表（代替卡片） ---------- */
.index-list { border-bottom: 1px solid var(--line); }
.index-row {
  display: grid; grid-template-columns: 78px 1.1fr 1.6fr 46px; gap: 32px; align-items: start;
  padding: 34px 0; border-top: 1px solid var(--line); transition: background .3s, padding .3s;
}
.index-row:first-child { border-top: 0; }
.index-row:hover { background: var(--paper-2); padding-left: 18px; padding-right: 18px; }
.index-row .n { font-family: var(--font-serif); font-size: 30px; color: var(--accent); line-height: 1; }
.index-row h3 { font-size: 22px; }
.index-row h3 .en { display: block; font-family: var(--font-sans); font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); margin-top: 8px; font-weight: 600; }
.index-row p { color: var(--ink-2); font-size: 15px; }
.index-row .go { font-size: 22px; color: var(--muted); transition: .3s; align-self: center; }
.index-row:hover .go { color: var(--accent); transform: translateX(6px); }
@media (max-width: 800px) {
  .index-row { grid-template-columns: 46px 1fr; gap: 18px; }
  .index-row p { grid-column: 2; }
  .index-row .go { display: none; }
}

/* ---------- 墨黑数据横带 ---------- */
.band { background: var(--ink); color: var(--paper); }
.band-inner { display: grid; grid-template-columns: repeat(4, 1fr); }
.band .cell { padding: 52px 30px; border-right: 1px solid rgba(255,255,255,.14); }
.band .cell:last-child { border-right: 0; }
.band .num { font-family: var(--font-serif); font-size: clamp(38px, 5vw, 62px); line-height: 1; }
.band .num small { font-size: .38em; color: var(--accent); font-family: var(--font-sans); font-weight: 700; margin-left: 4px; }
.band .lbl { margin-top: 14px; font-size: 13.5px; color: #a49e8f; letter-spacing: .4px; }
@media (max-width: 800px) {
  .band-inner { grid-template-columns: repeat(2, 1fr); }
  .band .cell:nth-child(2) { border-right: 0; }
  .band .cell:nth-child(1), .band .cell:nth-child(2) { border-bottom: 1px solid rgba(255,255,255,.14); }
}

/* ---------- 双栏编辑排版 ---------- */
.editorial { display: grid; grid-template-columns: 1fr 1.25fr; gap: 60px; align-items: start; }
.editorial .quote { font-family: var(--font-serif); font-size: clamp(24px, 3vw, 34px); line-height: 1.42; }
.editorial .quote::before { content: ""; display: block; width: 54px; height: 3px; background: var(--accent); margin-bottom: 26px; }
.editorial .body p { color: var(--ink-2); margin-bottom: 18px; font-size: 15.5px; }
.editorial .body p:last-child { margin-bottom: 0; }
@media (max-width: 860px) { .editorial { grid-template-columns: 1fr; gap: 32px; } }

/* ---------- 手风琴服务 ---------- */
.acc { border-top: 1px solid var(--line-strong); }
.acc-item { border-bottom: 1px solid var(--line); }
.acc-head {
  display: grid; grid-template-columns: 64px 1fr auto; gap: 26px; align-items: center;
  width: 100%; background: none; border: 0; cursor: pointer; text-align: left;
  padding: 30px 0; font-family: inherit; color: inherit;
}
.acc-head .n { font-family: var(--font-serif); font-size: 26px; color: var(--accent); }
.acc-head h3 { font-size: 22px; }
.acc-head .sign { font-size: 26px; color: var(--ink-2); transition: transform .3s; line-height: 1; }
.acc-item.open .sign { transform: rotate(45deg); color: var(--accent); }
.acc-body { max-height: 0; overflow: hidden; transition: max-height .45s cubic-bezier(.16,.8,.3,1); }
.acc-item.open .acc-body { max-height: 460px; }
.acc-body-inner { padding: 0 0 34px 90px; }
.acc-body p { color: var(--ink-2); font-size: 15.5px; max-width: 780px; }
.acc-body .chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.acc-body .chips span { font-size: 12.5px; font-weight: 600; color: var(--ink); border: 1px solid var(--line-strong); padding: 6px 14px; }
@media (max-width: 800px) {
  .acc-head { grid-template-columns: 44px 1fr auto; gap: 16px; }
  .acc-head h3 { font-size: 18px; }
  .acc-body-inner { padding-left: 60px; }
}

/* ---------- 内页头 ---------- */
.page-head { padding: 76px 0 48px; border-bottom: 1px solid var(--line-strong); }
.page-head .crumb { font-size: 12.5px; letter-spacing: 1.6px; text-transform: uppercase; color: var(--muted); margin-bottom: 22px; }
.page-head .crumb a:hover { color: var(--accent); }
.page-head h1 { font-size: clamp(38px, 6.4vw, 82px); line-height: 1.04; letter-spacing: -.03em; max-width: 16ch; }
.page-head .lead { margin-top: 26px; color: var(--ink-2); font-size: 17px; max-width: 700px; }

/* ---------- 时间线（编辑式） ---------- */
.tl { border-top: 1px solid var(--line-strong); }
.tl-row { display: grid; grid-template-columns: 150px 1fr; gap: 34px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.tl-row .y { font-family: var(--font-serif); font-size: 22px; color: var(--accent); }
.tl-row h4 { font-size: 19px; margin-bottom: 6px; }
.tl-row p { color: var(--ink-2); font-size: 15px; }
@media (max-width: 700px) { .tl-row { grid-template-columns: 1fr; gap: 8px; } }

/* ---------- 资质网格（线框） ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); }
.cert-grid .c { border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); padding: 34px 30px; }
.cert-grid .c .t { font-family: var(--font-serif); font-size: 19px; margin-bottom: 12px; }
.cert-grid .c .d { color: var(--ink-2); font-size: 14.5px; }
.cert-grid .c .m { font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--accent); font-weight: 700; margin-bottom: 16px; }
@media (max-width: 900px) { .cert-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .cert-grid { grid-template-columns: 1fr; } }

/* ---------- 极简联系 ---------- */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
.field-line { margin-bottom: 30px; }
.field-line label { display: block; font-size: 11.5px; letter-spacing: 1.8px; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; font-weight: 700; }
.field-line input, .field-line textarea, .field-line select {
  width: 100%; background: transparent; border: 0; border-bottom: 1px solid var(--line-strong);
  padding: 10px 0; font-family: var(--font-serif); font-size: 18px; color: var(--ink);
}
.field-line select { font-family: var(--font-sans); font-size: 16px; }
.field-line input:focus, .field-line textarea:focus, .field-line select:focus { outline: none; border-bottom-color: var(--accent); }
.field-line textarea { resize: vertical; min-height: 90px; }
.form-ok { display: none; padding: 16px 0; border-top: 1px solid var(--accent); border-bottom: 1px solid var(--accent); color: var(--accent-2); font-weight: 600; margin-bottom: 26px; font-size: 15px; }
.form-ok.show { display: block; }
.info-list { border-top: 1px solid var(--line-strong); }
.info-list .row { display: grid; grid-template-columns: 120px 1fr; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.info-list .row .k { font-size: 12px; letter-spacing: 1.4px; text-transform: uppercase; color: var(--muted); font-weight: 700; padding-top: 3px; }
.info-list .row .v { font-family: var(--font-serif); font-size: 18px; }
@media (max-width: 860px) { .contact-wrap { grid-template-columns: 1fr; gap: 40px; } }

/* ---------- 页脚 ---------- */
.footer { background: var(--ink); color: #b5b0a2; padding: 70px 0 34px; }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 46px; border-bottom: 1px solid rgba(255,255,255,.14); }
.footer .logo .zh { color: #fff; }
.footer .logo .en { color: #8a8577; }
.footer h5 { font-family: var(--font-serif); color: #fff; font-size: 16px; margin-bottom: 20px; }
.footer li { margin-bottom: 12px; font-size: 14.5px; }
.footer a:hover { color: #fff; }
.footer .desc { margin-top: 22px; font-size: 14px; line-height: 1.85; max-width: 340px; color: #8f8a7c; }
.footer-bot { padding-top: 26px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; color: #8a8577; }
@media (max-width: 900px) { .footer-top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .footer-top { grid-template-columns: 1fr; } }

/* ---------- 动画 ----------
   注意：仅在 <html> 带 .js 类时才把内容设为透明。
   这样 JS 被拦截/加载失败时内容依然可见（由 <head> 内联脚本添加 .js）。 */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s cubic-bezier(.16,.8,.3,1), transform .8s cubic-bezier(.16,.8,.3,1); }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- 通用小工具 ---------- */
.mt-0 { margin-top: 0; }
.center { text-align: center; }
.pad-b-0 { padding-bottom: 0; }

/* ===========================================================
   以下为内容增强新增：插画、照片位、团队、案例、设备、FAQ、文化
   =========================================================== */

/* ---------- 插画 / 照片位 ---------- */
.figure { position: relative; overflow: hidden; border: 1px solid var(--line-strong); background: var(--paper-2); }
.figure svg { display: block; width: 100%; height: 100%; }
.figure .ph-tag {
  position: absolute; left: 14px; bottom: 14px; font-size: 11px; letter-spacing: 1.4px;
  text-transform: uppercase; color: var(--muted); background: rgba(250,248,244,.9);
  border: 1px solid var(--line); padding: 5px 10px; font-weight: 700;
}
.figure-wide { aspect-ratio: 16 / 7; }
.figure-16-10 { aspect-ratio: 16 / 10; }
.figure-4-3 { aspect-ratio: 4 / 3; }
.figure-1-1 { aspect-ratio: 1 / 1; }

/* 首页首屏右侧编辑式插画 */
.hero-figure { border: 1px solid var(--line-strong); background: var(--paper-2); aspect-ratio: 4 / 5; }

/* ---------- 核心团队 ---------- */
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); }
.team-card { border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); display: flex; flex-direction: column; transition: background .3s; }
.team-card:hover { background: var(--paper-2); }
.team-card .ph { aspect-ratio: 1 / 1; border-bottom: 1px solid var(--line); position: relative; overflow: hidden; background-color: var(--paper-2);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200'%3E%3Crect width='200' height='200' fill='%23f2efe8'/%3E%3Ccircle cx='100' cy='100' r='72' fill='none' stroke='%23c8401c' stroke-width='1' opacity='.25'/%3E%3Ccircle cx='100' cy='76' r='32' fill='%2316150f' opacity='.1'/%3E%3Cpath d='M40 200 C40 152 68 130 100 130 C132 130 160 152 160 200 Z' fill='%2316150f' opacity='.1'/%3E%3Ccircle cx='100' cy='76' r='32' fill='none' stroke='%2316150f' stroke-width='1.2' opacity='.35'/%3E%3Cpath d='M40 200 C40 152 68 130 100 130 C132 130 160 152 160 200' fill='none' stroke='%2316150f' stroke-width='1.2' opacity='.35'/%3E%3C/svg%3E");
  background-size: cover; background-position: center;
}
.team-card .ph::after {
  content: "待替换：成员职业照"; position: absolute; left: 12px; bottom: 12px;
  font-size: 10.5px; letter-spacing: 1px; color: var(--muted); background: rgba(250,248,244,.92);
  border: 1px solid var(--line); padding: 4px 8px; font-weight: 700;
}
.team-card .ph svg { width: 100%; height: 100%; display: block; }
.team-card .bd { padding: 24px 24px 28px; flex: 1; display: flex; flex-direction: column; }
.team-card .bd h4 { font-size: 20px; }
.team-card .bd .role { color: var(--accent); font-size: 13.5px; font-weight: 700; margin-top: 8px; letter-spacing: .3px; }
.team-card .bd .meta { color: var(--ink-2); font-size: 13.5px; margin-top: 12px; line-height: 1.7; flex: 1; }
.team-card .bd .certs { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--muted); line-height: 1.7; }
@media (max-width: 900px) { .team-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .team-grid { grid-template-columns: 1fr; } }

/* ---------- 项目案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); }
.case-card { border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); display: flex; flex-direction: column; transition: background .3s; }
.case-card:hover { background: var(--paper-2); }
.case-card .cover { aspect-ratio: 16 / 9; border-bottom: 1px solid var(--line); overflow: hidden; background: var(--paper-2); }
.case-card .cover svg { width: 100%; height: 100%; display: block; }
.case-card .bd { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.case-card .bd .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.case-card .bd .tags span { font-size: 11.5px; font-weight: 700; color: var(--accent); border: 1px solid var(--line-strong); padding: 3px 9px; letter-spacing: .4px; }
.case-card .bd h4 { font-size: 17.5px; line-height: 1.45; }
.case-card .bd .loc { color: var(--muted); font-size: 13px; margin-top: 10px; }
.case-card .bd .sum { color: var(--ink-2); font-size: 14px; margin-top: 12px; flex: 1; }
.case-card .bd .yr { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--muted); font-weight: 700; letter-spacing: 1px; }
@media (max-width: 900px) { .case-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .case-grid { grid-template-columns: 1fr; } }

/* 案例统计条 */
.case-stats { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line-strong); margin-bottom: 44px; }
.case-stats .c { padding: 30px 26px; border-right: 1px solid var(--line); }
.case-stats .c:last-child { border-right: 0; }
.case-stats .c b { display: block; font-family: var(--font-serif); font-size: 34px; line-height: 1; }
.case-stats .c b small { font-size: .45em; color: var(--accent); font-family: var(--font-sans); font-weight: 700; margin-left: 3px; }
.case-stats .c span { display: block; margin-top: 10px; font-size: 13.5px; color: var(--muted); }
@media (max-width: 800px) { .case-stats { grid-template-columns: repeat(2, 1fr); } .case-stats .c:nth-child(2) { border-right: 0; } .case-stats .c:nth-child(1), .case-stats .c:nth-child(2) { border-bottom: 1px solid var(--line); } }

/* 案例筛选 */
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.filters button {
  font-family: inherit; font-size: 13.5px; font-weight: 700; cursor: pointer;
  padding: 9px 18px; border: 1px solid var(--line-strong); background: transparent; color: var(--ink-2); transition: .22s;
}
.filters button:hover { color: var(--ink); }
.filters button.active { background: var(--ink); border-color: var(--ink); color: var(--paper); }

/* ---------- 设备与实验室 ---------- */
.equip-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); }
.equip { border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); padding: 28px; display: flex; gap: 20px; align-items: flex-start; transition: background .3s; }
.equip:hover { background: var(--paper-2); }
.equip .ic { width: 54px; height: 54px; flex: none; border: 1px solid var(--line-strong); display: grid; place-items: center; }
.equip .ic svg { width: 26px; height: 26px; }
.equip h4 { font-size: 17px; margin-bottom: 8px; }
.equip .models { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 12px; }
.equip .models span { font-size: 12px; font-weight: 600; color: var(--ink-2); border: 1px solid var(--line); padding: 4px 10px; font-family: var(--font-sans); }
.equip p { color: var(--ink-2); font-size: 14px; }
@media (max-width: 800px) { .equip-grid { grid-template-columns: 1fr; } }

/* ---------- 企业文化 ---------- */
.culture { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); }
.culture .c { border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); padding: 36px 30px; }
.culture .c .m { font-size: 11px; letter-spacing: 2.4px; text-transform: uppercase; color: var(--accent); font-weight: 700; margin-bottom: 18px; }
.culture .c h4 { font-family: var(--font-serif); font-size: 22px; margin-bottom: 14px; }
.culture .c p { color: var(--ink-2); font-size: 14.5px; }
@media (max-width: 800px) { .culture { grid-template-columns: 1fr; } }

/* ---------- 服务承诺 ---------- */
.pledge { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); }
.pledge .p { border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); padding: 30px 26px; }
.pledge .p .n { font-family: var(--font-serif); font-size: 28px; color: var(--accent); margin-bottom: 14px; }
.pledge .p h4 { font-size: 16.5px; margin-bottom: 10px; }
.pledge .p p { color: var(--ink-2); font-size: 14px; }
@media (max-width: 900px) { .pledge { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .pledge { grid-template-columns: 1fr; } }

/* ---------- 统计小条（内嵌） ---------- */
.inline-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--line-strong); }
.inline-stats .s { padding: 26px 24px; border-right: 1px solid var(--line); }
.inline-stats .s:last-child { border-right: 0; }
.inline-stats .s b { display: block; font-family: var(--font-serif); font-size: 30px; line-height: 1; }
.inline-stats .s span { display: block; margin-top: 10px; font-size: 13px; color: var(--muted); }

/* ---------- 客户 logo 墙（线框） ---------- */
.logo-wall { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); }
.logo-wall .l { border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); padding: 30px 18px; text-align: center; font-weight: 700; font-size: 14.5px; color: var(--ink-2); transition: .25s; }
.logo-wall .l:hover { background: var(--paper-2); color: var(--accent); }
@media (max-width: 900px) { .logo-wall { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 560px) { .logo-wall { grid-template-columns: repeat(2, 1fr); } }

/* ===== 微信扫码咨询 ===== */
.qr-card { text-align:center; }
.qr-title { font-family:var(--font-serif); font-size:clamp(22px,2.6vw,30px); margin-bottom:14px; }
.qr-lead { color:var(--ink-2); font-size:15px; margin-bottom:32px; }
.qr-frame { display:inline-block; position:relative; padding:14px; background:#fff; border:1px solid var(--line-strong); }
.qr-frame svg { display:block; width:206px; height:206px; }
.qr-tag { position:absolute; left:50%; transform:translateX(-50%); bottom:-12px; white-space:nowrap;
  font-size:11px; font-weight:700; letter-spacing:.4px; color:var(--accent); background:var(--paper);
  border:1px solid var(--line-strong); padding:5px 13px; }
.qr-steps { display:grid; grid-template-columns:repeat(3,1fr); margin:40px 0 0; padding:0;
  border-top:1px solid var(--line-strong); border-left:1px solid var(--line-strong); }
.qr-steps li { list-style:none; border-right:1px solid var(--line-strong); border-bottom:1px solid var(--line-strong);
  padding:22px 18px; font-size:13.5px; color:var(--ink-2); }
.qr-steps li b { display:block; font-family:var(--font-serif); font-size:24px; color:var(--accent); margin-bottom:8px; }
.qr-alt { margin-top:26px; font-size:13.5px; color:var(--muted); }
.qr-alt b { color:var(--ink); }
@media (max-width:560px){ .qr-steps { grid-template-columns:1fr; } }

/* ===========================================================
   无障碍与动效偏好（WCAG 2.1 AA）
   1) prefers-reduced-motion：尊重系统「减少动态效果」设置
   2) :focus-visible：键盘导航时提供清晰焦点环
   3) .skip-link：键盘 / 读屏用户可跳过导航直达正文
   =========================================================== */

/* ---------- 1. 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  /* 入场元素直接显示，不做位移 */
  .js .reveal, .reveal { opacity: 1 !important; transform: none !important; }
  /* 无限滚动字幕停止 */
  .marquee-track { animation: none !important; }
  /* 雷达扫描等旋转装饰停止 */
  .radar .sweep, .sweep { animation: none !important; }
}

/* ---------- 2. 键盘焦点可见 ---------- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}
/* 深色底上的焦点环换成亮色，保证可见 */
.footer :focus-visible, .cta-band :focus-visible, .band :focus-visible { outline-color: #ffffff; }
/* 鼠标点击时不显示焦点环 */
:focus:not(:focus-visible) { outline: none; }

/* ---------- 3. 跳到主内容 ---------- */
.skip-link {
  position: absolute; left: 12px; top: -70px; z-index: 999;
  padding: 11px 20px; font-size: 14.5px; font-weight: 700;
  background: #16150f; color: #faf8f4;
  border-radius: 8px; text-decoration: none; transition: top .2s;
}
.skip-link:focus { top: 12px; }