/* ============================================================
   JKL 神思记 — main.css
   视觉基调：新古典学院风 × 数字前沿
   色板来源：品牌 VI 图（米白暖纸底 / 鎏金 / 宝蓝→青→金渐变 / 藏青墨字）
   移动端优先；断点 ≥640px（平板）、≥1024px（桌面）
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root {
  --paper:      #faf8f1;  /* 全站米白暖纸底 */
  --paper-warm: #f3eddd;  /* 古典侧卡片底（暖羊皮纸） */
  --ink:        #1e2a4a;  /* 藏青墨字：标题/正文主色 */
  --text:       #333d5c;  /* 正文 */
  --text-dim:   #636a7d;  /* 次级文字 */
  --gold:       #c39435;  /* 鎏金主色：标题点缀、分隔线、图标 */
  --gold-dim:   #a97f2f;  /* 金暗部：边框强调、大号标题金 */
  --gold-ink:   #816020;  /* 深金：小字号金色文字（浅底对比度 ≥4.5:1） */
  --gold-soft:  #e2cd9a;  /* 金浅部：细线、装饰 */
  --blue:       #1e5fd6;  /* 宝蓝：数字侧主色 */
  --cyan:       #2a9fd8;  /* 青蓝：渐变中段 */
  --blue-ghost: rgba(30, 95, 214, 0.045); /* 数字侧卡片底 */
  --grad-brand: linear-gradient(100deg, var(--blue) 10%, var(--cyan) 50%, #d9a441 95%);

  --font-serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", STSong, serif;
  --font-sans:  "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --font-mono:  "SF Mono", "JetBrains Mono", Consolas, monospace;

  --nav-h: 3.5rem;
  --maxw: 72rem;
}

/* ---------- 2. Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 1rem); }
body {
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--gold-ink); text-decoration: none; transition: color .2s; }
a:hover, a:focus-visible { color: var(--blue); }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 2px; }
h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 600; line-height: 1.4; color: var(--ink); }
em.brand-en { font-family: var(--font-serif); font-style: italic; letter-spacing: .02em; }
code, .mono { font-family: var(--font-mono); font-size: .92em; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }
section { padding: 4.5rem 0; position: relative; }
.section-kicker {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .35em;
  color: var(--gold-ink);
  text-transform: uppercase;
  margin-bottom: .75rem;
}
.section-title { font-size: 1.65rem; margin-bottom: .5rem; }
.section-sub { color: var(--text-dim); margin-bottom: 2.5rem; max-width: 42rem; }

/* ---------- 3. 鎏金分隔线（中央菱形缀饰） ---------- */
.divider {
  display: flex; align-items: center; gap: .8rem;
  margin: 0 auto 2.5rem; max-width: 20rem;
  color: var(--gold);
}
.divider::before, .divider::after {
  content: ""; flex: 1; height: 1px; background: var(--gold-soft);
}
.divider svg { flex: none; width: 12px; height: 12px; }

/* ---------- 4. 导航 ---------- */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(250, 248, 241, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gold-soft);
}
.site-nav .wrap {
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-serif); font-size: 1.05rem; color: var(--ink);
  letter-spacing: .05em;
}
.nav-logo b {
  font-weight: 700;
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: var(--blue);
}
.nav-links { display: none; list-style: none; gap: 1.6rem; }
.nav-links a { color: var(--text); font-size: .9rem; }
.nav-links a:hover { color: var(--gold-ink); }
.nav-toggle {
  background: none; border: 1px solid var(--gold-soft); border-radius: 3px;
  width: 2.2rem; height: 2.2rem; cursor: pointer; color: var(--gold-ink);
  display: inline-flex; align-items: center; justify-content: center;
}
.nav-toggle svg { width: 18px; height: 18px; }
/* 移动端抽屉 */
.nav-drawer {
  position: fixed; top: var(--nav-h); left: 0; right: 0; z-index: 99;
  background: rgba(250, 248, 241, 0.98);
  border-bottom: 1px solid var(--gold-soft);
  padding: 1rem 1.25rem 1.5rem;
  display: none; flex-direction: column; gap: .2rem;
  list-style: none;
  box-shadow: 0 14px 30px rgba(30, 42, 74, .08);
}
.nav-drawer.open { display: flex; }
.nav-drawer a { display: block; padding: .6rem .25rem; color: var(--ink); border-bottom: 1px dashed var(--gold-soft); }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-block; padding: .7rem 1.6rem; border-radius: 3px;
  font-size: .95rem; letter-spacing: .08em; cursor: pointer;
  transition: all .25s; border: 1px solid transparent; text-align: center;
}
.btn-brass {
  background: linear-gradient(160deg, #d3a848, var(--gold));
  color: #fffdf6; font-weight: 600;
  border-color: var(--gold-ink);
  box-shadow: 0 2px 10px rgba(195, 148, 53, .28);
}
.btn-brass:hover, .btn-brass:focus-visible { color: #fffdf6; box-shadow: 0 4px 18px rgba(195, 148, 53, .42); transform: translateY(-1px); }
.btn-glow {
  background: transparent; color: var(--blue);
  border-color: rgba(30, 95, 214, .45);
}
.btn-glow:hover, .btn-glow:focus-visible { color: var(--blue); box-shadow: 0 3px 16px rgba(30, 95, 214, .18); border-color: var(--blue); transform: translateY(-1px); }

/* ---------- 6. 卡片：古典（暖纸 + 鎏金双线框证书感） ---------- */
.card-classic {
  background:
    linear-gradient(160deg, rgba(195, 148, 53, .05), transparent 45%),
    var(--paper-warm);
  border: 1px solid var(--gold);
  outline: 1px solid var(--gold-soft); outline-offset: -7px;
  box-shadow: 0 10px 30px rgba(30, 42, 74, .07);
  padding: 2rem 1.5rem;
  position: relative;
}

/* ---------- 7. 卡片：数字前沿（蓝调玻璃，浅色版） ---------- */
.card-glass {
  background: linear-gradient(170deg, rgba(42, 159, 216, .05), var(--blue-ghost) 60%), #fdfcf8;
  border: 1px solid rgba(30, 95, 214, .25);
  border-radius: 4px;
  padding: 2rem 1.5rem;
  box-shadow: 0 10px 30px rgba(30, 95, 214, .05);
  transition: box-shadow .3s, border-color .3s;
}
.card-glass:hover {
  border-color: rgba(30, 95, 214, .5);
  box-shadow: 0 12px 34px rgba(30, 95, 214, .13);
}

/* ---------- 8. 徽章（权威背书） ---------- */
.badges { display: flex; flex-direction: column; gap: .75rem; margin: 2rem 0; }
.badge {
  display: flex; align-items: center; gap: .7rem;
  border: 1px solid var(--gold-soft); border-radius: 3px;
  padding: .55rem .95rem; font-size: .88rem; color: var(--ink);
  background: rgba(255, 253, 246, .8);
  box-shadow: 0 2px 8px rgba(30, 42, 74, .05);
}
.badge svg { width: 20px; height: 20px; flex: none; color: var(--gold); }

/* ---------- 9. Hero ---------- */
#hero {
  min-height: 100svh;
  display: flex; align-items: center;
  padding-top: calc(var(--nav-h) + 2rem);
  overflow: hidden;
  background:
    radial-gradient(60rem 30rem at 110% -10%, rgba(42, 159, 216, .07), transparent 60%),
    radial-gradient(50rem 26rem at -15% 110%, rgba(195, 148, 53, .08), transparent 60%),
    var(--paper);
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
/* 四角鎏金花纹框（呼应 VI 图边框） */
.hero-frame {
  position: absolute; inset: 1.1rem; border: 1px solid var(--gold-soft);
  pointer-events: none;
}
.hero-frame::before, .hero-frame::after {
  content: ""; position: absolute; width: 14px; height: 14px;
  border: 1px solid var(--gold);
}
.hero-frame::before { top: -7px; left: -7px; border-right: none; border-bottom: none; }
.hero-frame::after  { bottom: -7px; right: -7px; border-left: none; border-top: none; }
.hero-gear {
  position: absolute; left: -90px; bottom: -90px;
  width: 340px; height: 340px; color: var(--gold); opacity: .16;
  animation: gearSpin 60s linear infinite;
}
.hero-net {
  position: absolute; right: -40px; top: 6%;
  width: 380px; height: 320px; opacity: .9;
}
.hero-net circle { fill: var(--cyan); animation: nodePulse 4.5s ease-in-out infinite; }
.hero-net circle:nth-of-type(2n) { fill: var(--blue); animation-delay: 1.4s; }
.hero-net circle:nth-of-type(3n) { animation-delay: 2.6s; }
.hero-net line { stroke: rgba(30, 95, 214, .16); stroke-width: 1; }
@keyframes gearSpin { to { transform: rotate(360deg); } }
@keyframes nodePulse { 0%,100% { opacity: .2; } 50% { opacity: .85; } }

.hero-inner { position: relative; z-index: 1; }
.hero-title {
  font-size: clamp(1.9rem, 6vw, 3.4rem);
  letter-spacing: .04em; margin-bottom: 1.2rem;
}
.hero-title .brand-jkl {
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: var(--blue);
  font-weight: 700;
}
.hero-title .amp { color: var(--gold); }
.hero-lines { font-family: var(--font-serif); }
.hero-line-1 { font-size: clamp(1.15rem, 3.4vw, 1.6rem); color: var(--ink); letter-spacing: .28em; margin-bottom: .6rem; }
.hero-line-2 { font-size: clamp(.98rem, 2.6vw, 1.15rem); color: var(--text-dim); max-width: 34em; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.4rem; }

/* About 引文（手记感：左侧鎏金竖线） */
.about-quote {
  margin-top: 3.5rem; padding: 1.4rem 0 1.4rem 1.4rem;
  border-left: 2px solid var(--gold);
  max-width: 46rem;
  font-family: var(--font-serif);
  color: var(--ink);
  position: relative; z-index: 1;
}
.about-quote .q-mark {
  font-size: 2.6rem; color: var(--gold-soft); line-height: 1;
  font-family: var(--font-serif); display: block; margin-bottom: .3rem;
}
.about-kicker { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .3em; color: var(--gold-ink); margin-bottom: .6rem; }

/* ---------- 10. Services 双板块 ---------- */
.services-grid { display: grid; gap: 1.75rem; }
.svc-head { display: flex; align-items: center; gap: .65rem; margin-bottom: 1.4rem; }
.svc-head svg { width: 26px; height: 26px; flex: none; }
.card-classic .svc-head svg { color: var(--gold); }
.card-glass .svc-head svg { color: var(--blue); }
.svc-title { font-size: 1.28rem; }
.card-glass .svc-title { font-family: var(--font-sans); font-weight: 600; }
.svc-item { margin-bottom: 1.5rem; }
.svc-item:last-child { margin-bottom: 0; }
.svc-item h4 { font-size: 1.02rem; color: var(--gold-ink); margin-bottom: .35rem; }
.card-glass .svc-item h4 { color: var(--blue); font-family: var(--font-sans); }
.svc-item p { color: var(--text); font-size: .95rem; }

/* 隐私承诺强调块（双线框 + 盾） */
.privacy-pledge {
  margin-top: 1.9rem;
  border: 1px solid var(--gold);
  outline: 1px solid var(--gold-soft); outline-offset: 4px;
  padding: 1.2rem 1.1rem;
  background: rgba(195, 148, 53, .06);
}
.privacy-pledge .pp-head {
  display: flex; align-items: center; gap: .55rem;
  font-family: var(--font-serif); font-weight: 600; color: var(--gold-ink);
  margin-bottom: .5rem; font-size: 1.02rem;
}
.privacy-pledge .pp-head svg { width: 20px; height: 20px; }
.privacy-pledge p { font-size: .92rem; color: var(--ink); }

/* AI 学院受众列表 */
.aud-list { list-style: none; display: flex; flex-direction: column; gap: 1.1rem; }
.aud-list li { display: flex; gap: .8rem; align-items: flex-start; }
.aud-list svg { width: 20px; height: 20px; flex: none; color: var(--cyan); margin-top: .35rem; }
.aud-list h4 { font-family: var(--font-sans); font-size: 1rem; color: var(--blue); margin-bottom: .2rem; }
.aud-list p { color: var(--text); font-size: .95rem; }

/* ---------- 11. Archive 档案区 ---------- */
#archive .folder {
  position: relative; margin-top: 2.6rem;
  border: 1px solid var(--gold);
  background: var(--paper-warm);
  box-shadow: 0 12px 34px rgba(30, 42, 74, .08);
  padding: 2.2rem 1.4rem 2rem;
}
.folder-tab {
  position: absolute; top: -2.1rem; left: 0;
  background: var(--paper-warm);
  border: 1px solid var(--gold); border-bottom: none;
  padding: .5rem 1.3rem .35rem;
  font-family: var(--font-serif); color: var(--gold-ink);
  font-size: .95rem;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 100%, 0 100%);
}
.case-title { font-size: 1.25rem; margin-bottom: 2rem; }

/* 时间线 */
.timeline { position: relative; padding-left: 1.6rem; }
.timeline::before {
  content: ""; position: absolute; left: 5px; top: 8px; bottom: 8px;
  width: 1px; background: var(--gold-soft);
}
.tl-item { position: relative; padding-bottom: 2rem; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -1.6rem; top: .5em;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--paper-warm); border: 2px solid var(--gold);
}
.tl-item h4 { font-size: 1.05rem; color: var(--gold-ink); margin-bottom: .4rem; }
.tl-item p { color: var(--text); font-size: .95rem; }
/* Matrix 小节：数字材质 */
.tl-matrix .tl-body {
  background: linear-gradient(170deg, rgba(42, 159, 216, .06), var(--blue-ghost)), #fdfcf8;
  border: 1px solid rgba(30, 95, 214, .3); border-radius: 4px;
  padding: 1rem 1.1rem; font-family: var(--font-mono);
}
.tl-matrix h4 { color: var(--blue); font-family: var(--font-mono); }
.tl-matrix::before { border-color: var(--blue); box-shadow: 0 0 8px rgba(30, 95, 214, .45); background: #fdfcf8; }
.tl-matrix .tl-body p { font-size: .88rem; }
/* Queendom 小节：回到纸感衬线 */
.tl-queendom .tl-body {
  background: rgba(195, 148, 53, .07); border: 1px solid var(--gold-soft);
  padding: 1rem 1.1rem; font-family: var(--font-serif);
}
.tl-queendom .tl-body p { color: var(--ink); }

/* ---------- 12. Lab ---------- */
#lab { overflow: hidden; }
.lab-bg {
  position: absolute; right: -60px; top: -40px; width: 420px; height: 420px;
  color: var(--gold); opacity: .1; pointer-events: none;
}
.lab-grid { display: grid; gap: 1.5rem; position: relative; z-index: 1; }
.lab-card h3 { font-size: 1.12rem; margin-bottom: .7rem; display: flex; align-items: center; gap: .55rem; }
.lab-card h3 svg { width: 21px; height: 21px; flex: none; color: var(--blue); }
.lab-card p { color: var(--text); font-size: .95rem; }
.chip {
  display: inline-block; font-family: var(--font-mono); font-size: .8rem;
  border: 1px solid rgba(30, 95, 214, .35); border-radius: 3px;
  color: var(--blue); padding: .1rem .55rem; margin: .5rem .35rem 0 0;
  background: rgba(30, 95, 214, .05);
}
.lab-sub { margin-top: 1rem; }
.lab-sub h4 { font-size: .95rem; color: var(--gold-ink); margin-bottom: .25rem; font-family: var(--font-sans); font-weight: 600; }
.lab-sub p { font-size: .92rem; }

/* ---------- 13. Book（主页区块 + 落地页共用） ---------- */
#book { text-align: center; padding-bottom: 5.5rem; }
.book-cover {
  width: min(240px, 62vw); aspect-ratio: 2 / 3;
  margin: 2.6rem auto;
  background: linear-gradient(165deg, #253357, var(--ink) 55%, #16203a);
  border: 1px solid var(--gold);
  outline: 1px solid rgba(226, 205, 154, .55); outline-offset: -8px;
  box-shadow: 14px 18px 40px rgba(30, 42, 74, .3), 1px 0 0 2px rgba(195, 148, 53, .35);
  transform: perspective(900px) rotateY(-6deg);
  display: flex; flex-direction: column; align-items: center; justify-content: space-between;
  padding: 2.2rem 1.2rem 1.8rem;
}
.book-cover .bc-title {
  font-family: var(--font-serif); font-style: italic;
  color: #e2cd9a; font-size: 1.25rem; line-height: 1.5; letter-spacing: .04em;
}
.book-cover svg { width: 64%; height: auto; color: rgba(226, 205, 154, .65); }
.book-cover .bc-foot { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .3em; color: rgba(226, 205, 154, .5); }
/* 真实书封（替代占位封面） */
.book-cover-img {
  width: min(270px, 68vw); height: auto; aspect-ratio: 2 / 3; object-fit: cover;
  display: block; margin: 2.6rem auto;
  border: 1px solid var(--gold);
  box-shadow: 14px 18px 40px rgba(30, 42, 74, .3), 1px 0 0 2px rgba(195, 148, 53, .35);
  transform: perspective(900px) rotateY(-6deg);
}
.book-sub { font-family: var(--font-serif); font-style: italic; letter-spacing: .06em; color: var(--text-dim); margin-bottom: .4rem; }
.book-author { font-family: var(--font-mono); font-size: .82rem; letter-spacing: .25em; color: var(--gold-ink); margin-bottom: 1.6rem; }
.buy-note { font-size: .85rem; color: var(--text-dim); margin-top: 1.1rem; }
.buy-note a { text-decoration: underline; text-underline-offset: 2px; }
.book-name { font-size: clamp(1.6rem, 5vw, 2.3rem); font-style: italic; margin-bottom: 1rem; }
.book-quote { font-family: var(--font-serif); color: var(--text); max-width: 34em; margin: 0 auto 1.9rem; }
.book-date { font-family: var(--font-mono); font-size: .8rem; letter-spacing: .2em; color: var(--gold-ink); margin-bottom: 2.2rem; }

/* ---------- 14. 订阅信封（book.html） ---------- */
.envelope {
  max-width: 34rem; margin: 3rem auto 0; position: relative;
  background: var(--paper-warm);
  border: 1px solid var(--gold);
  outline: 1px solid var(--gold-soft); outline-offset: 5px;
  box-shadow: 0 14px 36px rgba(30, 42, 74, .1);
  padding: 4.2rem 1.5rem 2.2rem;
  text-align: center;
}
.envelope::before { /* 信封封盖 */
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3.1rem;
  background: linear-gradient(180deg, rgba(195, 148, 53, .16), rgba(195, 148, 53, .02));
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  pointer-events: none;
}
.wax-seal {
  position: absolute; top: 1.9rem; left: 50%; transform: translateX(-50%);
  width: 3.1rem; height: 3.1rem; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #ddb457, var(--gold) 55%, #8a6a24);
  color: #fffdf6; font-family: var(--font-serif); font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  font-size: .82rem; letter-spacing: .05em;
  box-shadow: 0 3px 10px rgba(30, 42, 74, .3), inset 0 0 0 2px rgba(255, 253, 246, .35);
}
.envelope h2, .envelope h3 { font-size: 1.3rem; margin: 1rem 0 .8rem; }
.envelope .env-lead { color: var(--text); font-size: .95rem; max-width: 28em; margin: 0 auto 1.6rem; }

/* ---------- 15. Footer ---------- */
footer.site-footer { padding: 3.5rem 0 2.5rem; }
.footer-rule {
  height: 1px; background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin-bottom: 3rem;
}
.footer-head { font-family: var(--font-serif); font-size: 1.15rem; margin-bottom: 1.6rem; }
.contact-list { list-style: none; display: flex; flex-direction: column; gap: .9rem; margin-bottom: 2.6rem; }
.contact-list li { display: flex; align-items: center; gap: .8rem; flex-wrap: wrap; }
.contact-list svg { width: 20px; height: 20px; flex: none; color: var(--gold); }
.contact-list .c-label { color: var(--text-dim); font-size: .88rem; min-width: 9.5rem; }
.contact-list .c-value { color: var(--ink); font-size: .95rem; }
.copy-btn {
  background: none; border: 1px solid var(--gold-soft); border-radius: 3px;
  color: var(--gold-ink); font-size: .72rem; padding: .15rem .6rem; cursor: pointer;
  font-family: var(--font-sans); transition: all .2s;
}
.copy-btn:hover { border-color: var(--gold); color: var(--gold); }
.footer-legal { color: var(--text-dim); font-size: .82rem; line-height: 2; }
.footer-legal .slogan { font-family: var(--font-serif); color: var(--gold-ink); }

/* Toast */
.toast {
  position: fixed; bottom: 1.6rem; left: 50%; transform: translateX(-50%) translateY(20px);
  background: #fffdf6; border: 1px solid var(--gold);
  color: var(--ink); font-size: .85rem; padding: .55rem 1.2rem; border-radius: 3px;
  box-shadow: 0 8px 24px rgba(30, 42, 74, .15);
  opacity: 0; pointer-events: none; transition: opacity .25s, transform .25s; z-index: 200;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* book.html 页面骨架 */
.book-page main { padding-top: calc(var(--nav-h) + 3rem); text-align: center; }
.back-link { display: inline-block; margin-top: 3rem; font-size: .9rem; color: var(--text-dim); }
.back-link:hover { color: var(--gold-ink); }

/* ---------- 16. Reduced motion 总闸 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------- 17. ≥640px（平板） ---------- */
@media (min-width: 640px) {
  .wrap { padding: 0 2rem; }
  .nav-toggle { display: none; }
  .nav-links { display: flex; }
  .nav-drawer { display: none !important; }
  .badges { flex-direction: row; flex-wrap: wrap; }
  .contact-list { flex-direction: row; flex-wrap: wrap; gap: 1.2rem 2.6rem; }
  .contact-list .c-label { min-width: 0; }
}

/* ---------- 18. ≥1024px（桌面） ---------- */
@media (min-width: 1024px) {
  section { padding: 6rem 0; }
  .section-title { font-size: 2rem; }
  .services-grid { grid-template-columns: 1fr 1fr; align-items: stretch; }
  .lab-grid { grid-template-columns: 1fr 1fr; }
  .hero-gear { width: 460px; height: 460px; left: -120px; bottom: -120px; }
  .hero-net { width: 520px; height: 430px; right: 0; }
  .hero-frame { inset: 1.6rem; }
  #archive .folder { padding: 2.6rem 2.4rem 2.4rem; }
  .timeline { padding-left: 2rem; }
  .tl-item::before { left: -2rem; }
}