/* ==========================================================================
   归浦 AI 实验室 · GUIPU AI LAB · 品牌视觉层 V6.0
   --------------------------------------------------------------------------
   定位：AI 产品创新与应用研发实验室
   气质：国际实验室 —— 大面积留白 / 暖灰分区 / 深墨正文 / 蓝紫点缀 / 克制的动效

   设计约束（与旧层共存，不推翻）
     1. 本文件最后加载，所有新增类以 lb- 前缀命名，不与 v5~v8 / gp10~gp15 冲突
     2. 不接管 .nav / .footer / .btn：nav 与 footer 使用全新类名，彻底隔离旧样式
     3. 旧层负责「动效与骨架」（gp-rv 入场、v16-marquee 模型滚动、gp-sparkles 粒子），
        本层只负责「品牌与版式」，两者叠加而不互删
     4. 圆角克制（12~18px），阴影极低透明，不使用玻璃拟态堆叠
   ========================================================================== */

/* ---------- 0. 令牌 ---------- */
:root{
  --lb-sans:"Plus Jakarta Sans","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --lb-serif:"Instrument Serif","Noto Serif SC",Georgia,"Songti SC",serif;

  --lb-ink:#0B0C0E;
  --lb-ink-2:#1B1D23;
  --lb-ink-3:#54575F;
  --lb-ink-4:#8B8E96;

  --lb-canvas:#FFFFFF;
  --lb-warm:#F7F5F2;
  --lb-warm-2:#EFEBE5;
  --lb-line:#E7E3DD;
  --lb-line-2:#D8D3CB;

  --lb-violet:#6D4BF6;
  --lb-violet-hi:#8E6BFF;
  --lb-indigo:#4B3AD6;
  --lb-tint:#F2EEFF;
  --lb-tint-2:#E8E1FF;
  --lb-grad:linear-gradient(135deg,#8E6BFF 0%,#6D4BF6 46%,#4B3AD6 100%);

  --lb-mint:#0E7C5A;
  --lb-amber:#9A5B00;

  --lb-sh-xs:0 1px 2px rgba(18,16,28,.04);
  --lb-sh-sm:0 2px 8px rgba(18,16,28,.05);
  --lb-sh-md:0 12px 32px -18px rgba(18,16,28,.22);
  --lb-sh-lg:0 28px 64px -32px rgba(18,16,28,.28);

  --lb-ease:cubic-bezier(.22,.61,.36,1);
  --lb-max:1180px;
  --lb-gut:28px;
  --lb-nav-h:74px;
}

/* ---------- 1. 基础 ---------- */
body.lb{
  background:var(--lb-canvas);
  color:var(--lb-ink);
  font-family:var(--lb-sans);
  font-size:16px;
  line-height:1.68;
  letter-spacing:-.011em;
  -webkit-font-smoothing:antialiased;
}
body.lb *{box-sizing:border-box}
body.lb ::selection{background:var(--lb-tint-2);color:var(--lb-ink)}

.lb-wrap{max-width:var(--lb-max);margin:0 auto;padding:0 var(--lb-gut)}
.lb-sec{padding:clamp(64px,8vw,116px) 0}
.lb-sec--warm{background:var(--lb-warm)}
.lb-sec--tight{padding:clamp(44px,5vw,72px) 0}
.lb-main{display:block;min-height:62vh}

/* 标题：字号台阶统一在此，页面内不再写死 px */
.lb-h1{font-size:clamp(38px,5.6vw,72px);line-height:1.08;font-weight:700;letter-spacing:-.035em;margin:0}
.lb-h2{font-size:clamp(28px,3.5vw,46px);line-height:1.16;font-weight:700;letter-spacing:-.03em;margin:0}
.lb-h3{font-size:clamp(19px,1.5vw,22px);line-height:1.4;font-weight:700;letter-spacing:-.018em;margin:0}
.lb-lead{font-size:clamp(16px,1.35vw,19px);line-height:1.72;color:var(--lb-ink-3);margin:0}
.lb-body{font-size:15.5px;line-height:1.78;color:var(--lb-ink-3);margin:0}
.lb-small{font-size:13.5px;line-height:1.7;color:var(--lb-ink-4);margin:0}

/* 英文衬线斜体：品牌里唯一的「手写感」，只用于拉丁字母，避免中文假斜体 */
.lb-serif{font-family:var(--lb-serif);font-style:italic;font-weight:400;letter-spacing:0}
.lb-eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--lb-ink-4)
}
.lb-eyebrow::before{content:"";width:22px;height:1px;background:var(--lb-line-2)}

/* ---------- 2. 按钮 ---------- */
.lb-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 24px;border-radius:12px;border:1px solid transparent;
  font-family:inherit;font-size:15px;font-weight:600;letter-spacing:-.01em;
  text-decoration:none;cursor:pointer;
  transition:transform .28s var(--lb-ease),background .22s,box-shadow .28s,color .22s,border-color .22s;
  white-space:nowrap
}
.lb-btn:hover{transform:translateY(-1px)}
.lb-btn:active{transform:translateY(0)}
.lb-btn--primary{background:var(--lb-ink);color:#fff;box-shadow:var(--lb-sh-sm)}
.lb-btn--primary:hover{background:#000;box-shadow:var(--lb-sh-md)}
.lb-btn--violet{background:var(--lb-grad);color:#fff;box-shadow:0 12px 26px -14px rgba(109,75,246,.6)}
.lb-btn--violet:hover{box-shadow:0 16px 34px -14px rgba(109,75,246,.7)}
.lb-btn--line{background:transparent;color:var(--lb-ink);border-color:var(--lb-line-2)}
.lb-btn--line:hover{border-color:var(--lb-ink);background:#fff}
.lb-btn--ghost{background:transparent;color:var(--lb-ink-3);padding:0 4px;height:auto}
.lb-btn--ghost:hover{color:var(--lb-ink)}
.lb-btn--sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.lb-btn--lg{height:54px;padding:0 30px;font-size:16px;border-radius:14px}
.lb-btn .arw{transition:transform .28s var(--lb-ease)}
.lb-btn:hover .arw{transform:translateX(3px)}

/* 文字链接 */
.lb-link{display:inline-flex;align-items:center;gap:7px;font-size:14.5px;font-weight:600;
  color:var(--lb-ink);text-decoration:none;border-bottom:1px solid var(--lb-line-2);
  padding-bottom:2px;transition:border-color .2s,color .2s}
.lb-link:hover{border-color:var(--lb-violet);color:var(--lb-violet)}

/* ---------- 3. 导航 ---------- */
.lb-nav{
  position:fixed;inset:0 0 auto 0;z-index:95;
  height:calc(var(--lb-nav-h) + env(safe-area-inset-top,0px));
  padding-top:env(safe-area-inset-top,0px);
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(1.7) blur(16px);
  -webkit-backdrop-filter:saturate(1.7) blur(16px);
  border-bottom:1px solid transparent;
  transition:border-color .3s,background .3s
}
.lb-nav.is-stuck{border-bottom-color:var(--lb-line);background:rgba(255,255,255,.94)}
.lb-nav-in{
  max-width:1320px;margin:0 auto;padding:0 32px;height:var(--lb-nav-h);
  display:flex;align-items:center;gap:32px
}

/* 品牌标：字标优先，保证新品牌名一定能显示（旧位图是 GEO 时期的 logo） */
.lb-brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--lb-ink);flex:0 0 auto}
.lb-brand-mark{
  width:30px;height:30px;border-radius:9px;background:var(--lb-grad);
  display:grid;place-items:center;box-shadow:0 6px 14px -8px rgba(109,75,246,.8);flex:0 0 auto
}
.lb-brand-mark svg{width:17px;height:17px}
.lb-brand-tx{display:flex;flex-direction:column;line-height:1.1}
.lb-brand-tx b{font-size:15.5px;font-weight:700;letter-spacing:-.02em}
.lb-brand-tx em{font-family:var(--lb-serif);font-style:italic;font-size:11.5px;color:var(--lb-ink-4);
  letter-spacing:.06em;margin-top:2px}

.lb-nav-menu{display:flex;align-items:center;gap:4px;margin-right:auto}
.lb-nav-menu > a{
  position:relative;padding:9px 14px;border-radius:9px;text-decoration:none;
  font-size:14.5px;font-weight:500;color:var(--lb-ink-2);transition:color .2s,background .2s
}
.lb-nav-menu > a:hover{color:var(--lb-ink);background:var(--lb-warm)}
.lb-nav-menu > a.is-on{color:var(--lb-ink);font-weight:600}
.lb-nav-menu > a.is-on::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  border-radius:2px;background:var(--lb-grad)
}
.lb-nav-acts{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.lb-nav-acts > a.lb-nav-tx{
  padding:9px 12px;font-size:14.5px;font-weight:500;color:var(--lb-ink-2);text-decoration:none;
  border-radius:9px;transition:color .2s,background .2s
}
.lb-nav-acts > a.lb-nav-tx:hover{color:var(--lb-ink);background:var(--lb-warm)}

/* 汉堡 */
.lb-burger{display:none;width:42px;height:42px;border:1px solid var(--lb-line);background:#fff;
  border-radius:11px;cursor:pointer;padding:0;place-items:center}
.lb-burger i{display:block;width:16px;height:1.6px;background:var(--lb-ink);border-radius:2px;
  transition:transform .3s var(--lb-ease),opacity .2s}
.lb-burger i + i{margin-top:4.6px}
body.lb-menu-open .lb-burger i:nth-child(1){transform:translateY(6.2px) rotate(45deg)}
body.lb-menu-open .lb-burger i:nth-child(2){opacity:0}
body.lb-menu-open .lb-burger i:nth-child(3){transform:translateY(-6.2px) rotate(-45deg)}

/* 移动抽屉 */
.lb-drawer{
  position:fixed;inset:calc(var(--lb-nav-h) + env(safe-area-inset-top,0px)) 0 0 0;z-index:94;
  background:#fff;overflow-y:auto;padding:26px 24px 40px;
  transform:translateY(-8px);opacity:0;pointer-events:none;
  transition:opacity .26s var(--lb-ease),transform .26s var(--lb-ease)
}
body.lb-menu-open .lb-drawer{transform:none;opacity:1;pointer-events:auto}
body.lb-menu-open{overflow:hidden}
.lb-drawer-grp{margin-bottom:22px}
.lb-drawer-grp h6{font-size:11.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--lb-ink-4);margin:0 0 10px}
.lb-drawer a.lb-dr{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:15px 2px;border-bottom:1px solid var(--lb-line);
  text-decoration:none;color:var(--lb-ink);font-size:17px;font-weight:600;letter-spacing:-.02em
}
.lb-drawer a.lb-dr em{font-style:normal;font-size:12.5px;font-weight:500;color:var(--lb-ink-4)}
.lb-drawer-cta{display:grid;gap:10px;margin-top:26px}
.lb-drawer .lb-btn{width:100%}

/* ---------- 4. 首屏 ---------- */
.lb-hero{position:relative;overflow:hidden;padding-top:calc(var(--lb-nav-h) + clamp(56px,8vw,104px));
  padding-bottom:clamp(48px,6vw,84px)}
.lb-hero::before{
  content:"";position:absolute;top:-22%;right:-14%;width:min(760px,86vw);height:min(760px,86vw);
  background:radial-gradient(circle at 50% 50%,rgba(140,107,255,.16),rgba(140,107,255,0) 68%);
  border-radius:50%;pointer-events:none
}
.lb-hero::after{
  content:"";position:absolute;left:-12%;bottom:-30%;width:520px;height:520px;
  background:radial-gradient(circle,rgba(109,75,246,.07),transparent 70%);
  border-radius:50%;pointer-events:none
}
.lb-hero-in{position:relative;z-index:2}
.lb-hero-tag{
  display:inline-flex;align-items:center;gap:9px;height:32px;padding:0 14px;border-radius:999px;
  background:var(--lb-tint);border:1px solid #DED4FF;
  font-size:12.5px;font-weight:600;color:var(--lb-indigo);letter-spacing:.01em;margin-bottom:26px
}
.lb-hero-tag i{width:5px;height:5px;border-radius:50%;background:var(--lb-violet);
  box-shadow:0 0 0 3px rgba(109,75,246,.16)}
.lb-hero h1{max-width:15.5em}
.lb-hero .lb-lead{max-width:36em;margin-top:26px}
.lb-hero-acts{display:flex;flex-wrap:wrap;gap:12px;margin-top:38px}
.lb-hero-meta{display:flex;flex-wrap:wrap;gap:0;margin-top:56px;border-top:1px solid var(--lb-line)}
.lb-hero-meta div{padding:20px 34px 0 0;margin-right:34px;border-right:1px solid var(--lb-line)}
.lb-hero-meta div:last-child{border-right:0;margin-right:0}
.lb-hero-meta b{display:block;font-size:22px;font-weight:700;letter-spacing:-.03em;line-height:1.2}
.lb-hero-meta span{font-size:12.5px;color:var(--lb-ink-4);letter-spacing:.02em}

/* Hero 右侧：实验室「信号」视觉，不用假截图 */
.lb-hero-art{position:relative;min-height:340px}
.lb-orbit{position:absolute;inset:0;display:grid;place-items:center}
.lb-orbit-ring{
  position:absolute;border-radius:50%;border:1px solid var(--lb-line);
  animation:lb-spin 34s linear infinite
}
.lb-orbit-ring:nth-child(1){width:min(340px,74%);aspect-ratio:1}
.lb-orbit-ring:nth-child(2){width:min(250px,54%);aspect-ratio:1;border-style:dashed;
  animation-duration:26s;animation-direction:reverse;border-color:var(--lb-line-2)}
.lb-orbit-ring:nth-child(3){width:min(160px,34%);aspect-ratio:1;border-color:#D9CDFF}
.lb-orbit-ring i{
  position:absolute;top:-3px;left:50%;width:6px;height:6px;border-radius:50%;
  background:var(--lb-violet);box-shadow:0 0 0 4px rgba(109,75,246,.14)
}
.lb-orbit-core{
  position:relative;width:96px;height:96px;border-radius:26px;background:var(--lb-grad);
  display:grid;place-items:center;box-shadow:0 26px 54px -24px rgba(75,58,214,.7)
}
.lb-orbit-core svg{width:44px;height:44px}
@keyframes lb-spin{to{transform:rotate(360deg)}}

.lb-orbit-chip{
  position:absolute;display:inline-flex;align-items:center;gap:7px;
  height:34px;padding:0 13px;border-radius:10px;background:#fff;border:1px solid var(--lb-line);
  box-shadow:var(--lb-sh-sm);font-size:12.5px;font-weight:600;color:var(--lb-ink-2);white-space:nowrap
}
.lb-orbit-chip i{width:6px;height:6px;border-radius:50%;background:var(--lb-mint)}
.lb-orbit-chip.c1{top:8%;left:2%}
.lb-orbit-chip.c2{top:26%;right:0}
.lb-orbit-chip.c3{bottom:22%;left:0}
.lb-orbit-chip.c4{bottom:8%;right:6%}

/* ---------- 5. 模型生态（保留原 v16-marquee 组件，只换外壳） ---------- */
.lb-models{position:relative;padding:clamp(52px,6vw,76px) 0;border-top:1px solid var(--lb-line);
  border-bottom:1px solid var(--lb-line);background:#fff;overflow:hidden}
.lb-models-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;
  flex-wrap:wrap;margin-bottom:38px}
.lb-models-head h2{max-width:19em}
.lb-models-head p{max-width:26em;font-size:14.5px;color:var(--lb-ink-4);margin:0}
.lb-marquee-mask{
  position:relative;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent)
}
.lb-models-foot{margin-top:26px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
/* 覆盖旧 eco-item 在新外壳里的尺寸，保持滚动条高度一致 */
.lb-models .eco-item{padding:8px 16px;border-radius:12px}
.lb-models .eco-item b{font-size:12.5px}

/* ---------- 6. 产品矩阵 ---------- */
.lb-mx-head{display:flex;align-items:flex-end;justify-content:space-between;gap:36px;
  flex-wrap:wrap;margin-bottom:44px}
.lb-mx-head .lb-lead{max-width:30em}

.lb-mx{display:grid;gap:20px}
.lb-mx-main{
  display:grid;grid-template-columns:1.05fr .95fr;gap:0;align-items:stretch;
  border:1px solid var(--lb-line);border-radius:18px;overflow:hidden;background:#fff;
  transition:box-shadow .4s var(--lb-ease),border-color .3s
}
.lb-mx-main:hover{box-shadow:var(--lb-sh-lg);border-color:var(--lb-line-2)}
.lb-mx-main-copy{padding:clamp(28px,3.4vw,46px);display:flex;flex-direction:column;justify-content:center}
.lb-mx-main-art{position:relative;background:linear-gradient(160deg,#F4F1FF 0%,#EDE8FF 48%,#F7F5F2 100%);
  min-height:280px;padding:clamp(20px,2.6vw,34px);display:flex;align-items:center;justify-content:center}
.lb-mx-flag{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;
  letter-spacing:.08em;text-transform:uppercase;color:var(--lb-indigo);margin-bottom:18px}
.lb-mx-flag i{width:6px;height:6px;border-radius:50%;background:var(--lb-violet)}
.lb-mx-main h3{font-size:clamp(26px,2.6vw,34px);letter-spacing:-.03em;margin:0 0 12px}
.lb-mx-main .lb-body{max-width:34em}
.lb-mx-feats{list-style:none;margin:24px 0 30px;padding:0;display:grid;gap:11px}
.lb-mx-feats li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--lb-ink-2)}
.lb-mx-feats svg{flex:0 0 auto;margin-top:3px;color:var(--lb-violet)}
.lb-mx-acts{display:flex;flex-wrap:wrap;gap:12px;margin-top:auto}

/* 产品卡（未来扩展位） */
.lb-mx-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.lb-mx-card{
  border:1px dashed var(--lb-line-2);border-radius:16px;padding:24px;background:#fff;
  display:flex;flex-direction:column;gap:10px;min-height:168px;
  transition:border-color .3s,background .3s
}
.lb-mx-card:hover{border-color:var(--lb-violet);background:var(--lb-tint)}
.lb-mx-card .st{font-size:11.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  color:var(--lb-ink-4)}
.lb-mx-card b{font-size:16px;font-weight:700;letter-spacing:-.02em;color:var(--lb-ink-2)}
.lb-mx-card p{margin:0;font-size:13.5px;line-height:1.65;color:var(--lb-ink-4)}
.lb-mx-card.is-live{border-style:solid;border-color:var(--lb-line)}

/* ---------- 7. 探索方向：四个独立视觉模块 ---------- */
.lb-dir-head{max-width:38em;margin-bottom:52px}
.lb-dir-head .lb-h2{margin-top:18px}
.lb-dir-head .lb-lead{margin-top:20px}

.lb-dirs{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.lb-dir{
  position:relative;overflow:hidden;border-radius:18px;background:#fff;
  border:1px solid var(--lb-line);padding:clamp(26px,2.8vw,38px);
  display:flex;flex-direction:column;gap:14px;min-height:250px;
  transition:transform .4s var(--lb-ease),box-shadow .4s var(--lb-ease),border-color .3s
}
.lb-dir:hover{transform:translateY(-3px);box-shadow:var(--lb-sh-md);border-color:var(--lb-line-2)}
.lb-dir-num{font-family:var(--lb-serif);font-style:italic;font-size:13px;color:var(--lb-ink-4);
  letter-spacing:.06em}
.lb-dir h3{font-size:clamp(20px,1.9vw,25px);letter-spacing:-.025em;margin:0}
.lb-dir p{margin:0;font-size:14.5px;line-height:1.72;color:var(--lb-ink-3);max-width:30em}
.lb-dir-art{position:absolute;right:-8px;bottom:-8px;opacity:.9;pointer-events:none}
.lb-dir-art svg{width:132px;height:132px;display:block}
/* 四种底色，避免「四张同款卡片」 */
.lb-dir.d1{background:linear-gradient(160deg,#FBFAFF,#fff)}
.lb-dir.d2{background:linear-gradient(160deg,#FFFDF9,#fff)}
.lb-dir.d3{background:linear-gradient(160deg,#F9FBFB,#fff)}
.lb-dir.d4{background:linear-gradient(160deg,#FCFAFF,#fff)}
.lb-dir.d1::after,.lb-dir.d2::after,.lb-dir.d3::after,.lb-dir.d4::after{
  content:"";position:absolute;top:0;left:0;width:3px;height:44px;border-radius:0 0 3px 0
}
.lb-dir.d1::after{background:linear-gradient(var(--lb-violet),transparent)}
.lb-dir.d2::after{background:linear-gradient(#C8A24B,transparent)}
.lb-dir.d3::after{background:linear-gradient(#2F7E6B,transparent)}
.lb-dir.d4::after{background:linear-gradient(#3D5BD9,transparent)}

/* ---------- 8. Metis 展示（深墨色对比段，全站唯一） ---------- */
.lb-metis{background:#0A0B0E;color:#fff;padding:clamp(68px,8vw,112px) 0;position:relative;overflow:hidden}
.lb-metis::before{
  content:"";position:absolute;top:-40%;right:-10%;width:720px;height:720px;border-radius:50%;
  background:radial-gradient(circle,rgba(109,75,246,.34),transparent 66%);pointer-events:none
}
.lb-metis-in{position:relative;z-index:2;display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(32px,5vw,72px);
  align-items:center}
.lb-metis .lb-eyebrow{color:rgba(255,255,255,.5)}
.lb-metis .lb-eyebrow::before{background:rgba(255,255,255,.24)}
.lb-metis h2{margin:20px 0 20px;color:#fff;max-width:14em}
.lb-metis .lb-lead{color:rgba(255,255,255,.66);max-width:30em}
.lb-metis-caps{list-style:none;margin:32px 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:12px 20px}
.lb-metis-caps li{display:flex;align-items:center;gap:9px;font-size:14px;color:rgba(255,255,255,.82)}
.lb-metis-caps i{width:5px;height:5px;border-radius:50%;background:var(--lb-violet-hi);flex:0 0 auto}
.lb-metis-acts{display:flex;flex-wrap:wrap;gap:12px;margin-top:38px}
.lb-metis .lb-btn--primary{background:#fff;color:var(--lb-ink)}
.lb-metis .lb-btn--primary:hover{background:#F1EDFF}
.lb-metis .lb-btn--line{border-color:rgba(255,255,255,.24);color:#fff}
.lb-metis .lb-btn--line:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.4)}

/* 深色区里的产品窗（沿用 .mock 结构，改边框与底色） */
.lb-metis-win{
  border-radius:16px;overflow:hidden;border:1px solid rgba(255,255,255,.13);
  box-shadow:0 40px 80px -40px rgba(0,0,0,.9);background:#111318
}
.lb-metis-win .mock{background:#111318;border:0;border-radius:0;box-shadow:none}
.lb-metis-win .mock-bar{background:#191C22;border-bottom:1px solid rgba(255,255,255,.07)}
.lb-metis-win .mock-bar u{color:rgba(255,255,255,.42);background:rgba(255,255,255,.05)}
.lb-metis-win .mock-side{border-right-color:rgba(255,255,255,.07)}
.lb-metis-win .mock-side b{color:rgba(255,255,255,.34)}
.lb-metis-win .mock-sess{color:rgba(255,255,255,.6)}
.lb-metis-win .mock-sess.on{background:rgba(109,75,246,.2);color:#fff}
.lb-metis-win .mock-q{background:rgba(255,255,255,.06);color:rgba(255,255,255,.86)}
.lb-metis-win .mock-step{color:rgba(255,255,255,.52);background:rgba(255,255,255,.04)}
.lb-metis-win .mock-step.on{background:rgba(109,75,246,.18);color:#fff}
.lb-metis-win .mock-file{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.08)}
.lb-metis-win .mock-file b{color:#fff}
.lb-metis-win .mock-file span{color:rgba(255,255,255,.45)}
.lb-metis-win .mock-prog{background:rgba(255,255,255,.1)}
.lb-metis-win .mock-prog i{background:var(--lb-grad)}

/* ---------- 9. 实验项目 ---------- */
.lb-exp-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;
  flex-wrap:wrap;margin-bottom:40px}
.lb-exp-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.lb-exp{
  display:flex;flex-direction:column;gap:14px;padding:clamp(24px,2.6vw,32px);
  border:1px solid var(--lb-line);border-radius:16px;background:#fff;text-decoration:none;
  color:inherit;transition:transform .38s var(--lb-ease),box-shadow .38s,border-color .3s
}
.lb-exp:hover{transform:translateY(-3px);box-shadow:var(--lb-sh-md);border-color:var(--lb-line-2)}
.lb-exp-top{display:flex;align-items:center;justify-content:space-between;gap:14px}
.lb-exp-cat{font-size:11.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--lb-ink-4)}
.lb-st{display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:999px;
  font-size:11.5px;font-weight:600;letter-spacing:.02em}
.lb-st i{width:5px;height:5px;border-radius:50%;background:currentColor}
.lb-st.live{background:#E8F7F1;color:var(--lb-mint)}
.lb-st.beta{background:var(--lb-tint);color:var(--lb-indigo)}
.lb-st.proto{background:#FDF4E6;color:var(--lb-amber)}
.lb-st.research{background:#F2F3F5;color:var(--lb-ink-3)}
.lb-st.archived{background:#F4F4F5;color:var(--lb-ink-4)}
.lb-exp h3{font-size:19px;letter-spacing:-.02em;margin:0}
.lb-exp p{margin:0;font-size:14px;line-height:1.7;color:var(--lb-ink-3)}
.lb-exp-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;
  padding-top:16px;border-top:1px solid var(--lb-line);font-size:12.5px;color:var(--lb-ink-4)}
.lb-exp-foot span{display:inline-flex;align-items:center;gap:6px}

/* 空状态 */
.lb-empty{
  border:1px dashed var(--lb-line-2);border-radius:16px;padding:clamp(36px,5vw,60px);
  text-align:center;background:#fff
}
.lb-empty-ic{width:44px;height:44px;border-radius:13px;background:var(--lb-tint);display:grid;
  place-items:center;margin:0 auto 18px;color:var(--lb-violet)}
.lb-empty b{display:block;font-size:17px;letter-spacing:-.02em;margin-bottom:8px}
.lb-empty p{margin:0 auto;max-width:34em;font-size:14px;color:var(--lb-ink-4);line-height:1.7}

/* ---------- 10. 技术探索 ---------- */
.lb-tech{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(32px,5vw,64px);align-items:start}
.lb-tech-list{display:grid;gap:0;border-top:1px solid var(--lb-line)}
.lb-tech-row{
  display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:baseline;
  padding:22px 0;border-bottom:1px solid var(--lb-line);text-decoration:none;color:inherit;
  transition:padding .3s var(--lb-ease)
}
.lb-tech-row:hover{padding-left:8px}
.lb-tech-row .n{font-family:var(--lb-serif);font-style:italic;font-size:13px;color:var(--lb-ink-4);width:26px}
.lb-tech-row b{font-size:16.5px;font-weight:700;letter-spacing:-.02em;display:block}
.lb-tech-row p{margin:5px 0 0;font-size:13.5px;color:var(--lb-ink-4);line-height:1.6}
.lb-tech-row .go{color:var(--lb-ink-4);transition:color .2s,transform .3s var(--lb-ease)}
.lb-tech-row:hover .go{color:var(--lb-violet);transform:translateX(3px)}

/* ---------- 11. 新闻 ---------- */
.lb-news{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(24px,4vw,52px);align-items:start}
.lb-news-hero{display:block;text-decoration:none;color:inherit}
.lb-news-hero .im{
  aspect-ratio:16/10;border-radius:16px;overflow:hidden;background:var(--lb-warm);position:relative
}
.lb-news-hero .im img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--lb-ease)}
.lb-news-hero:hover .im img{transform:scale(1.03)}
.lb-news-hero .meta{display:flex;gap:10px;align-items:center;margin:20px 0 10px;
  font-size:12.5px;color:var(--lb-ink-4)}
.lb-news-hero h3{font-size:clamp(21px,2vw,27px);letter-spacing:-.025em;margin:0 0 10px;line-height:1.32}
.lb-news-hero p{margin:0;font-size:14.5px;color:var(--lb-ink-3);line-height:1.7}
.lb-news-side{display:grid;gap:0;border-top:1px solid var(--lb-line)}
.lb-news-item{display:block;padding:20px 0;border-bottom:1px solid var(--lb-line);
  text-decoration:none;color:inherit;transition:padding .3s var(--lb-ease)}
.lb-news-item:hover{padding-left:6px}
.lb-news-item .meta{font-size:12px;color:var(--lb-ink-4);margin-bottom:7px}
.lb-news-item h4{margin:0;font-size:15.5px;font-weight:700;letter-spacing:-.018em;line-height:1.45}
.lb-news-item:hover h4{color:var(--lb-violet)}

/* ---------- 12. 收尾 CTA ---------- */
.lb-end{position:relative;overflow:hidden;background:var(--lb-warm);padding:clamp(72px,8vw,116px) 0}
.lb-end::before{
  content:"";position:absolute;left:50%;top:-30%;width:min(900px,110vw);height:min(900px,110vw);
  transform:translateX(-50%);border-radius:50%;
  background:radial-gradient(circle,rgba(109,75,246,.11),transparent 62%);pointer-events:none
}
.lb-end-in{position:relative;z-index:2;text-align:center;max-width:820px;margin:0 auto}
.lb-end h2{margin:0 auto;max-width:16em}
.lb-end p{margin:22px auto 0;max-width:34em}
.lb-end-acts{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:38px}
/* 底层 logo 常驻滚动：沿用旧 marquee-track 结构，压到底部做背景 */
.lb-end .end-marquee{opacity:.5;margin-top:56px;position:relative;z-index:1}

/* ---------- 13. 页脚 ---------- */
.lb-foot{background:#fff;border-top:1px solid var(--lb-line);padding:clamp(48px,6vw,72px) 0 28px}
.lb-foot-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:clamp(24px,3vw,48px)}
.lb-foot-brand p{margin:16px 0 0;font-size:13.5px;line-height:1.7;color:var(--lb-ink-4);max-width:24em}
.lb-foot-col h4{font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--lb-ink-4);margin:0 0 16px}
.lb-foot-col a{display:block;font-size:14px;color:var(--lb-ink-2);text-decoration:none;
  padding:6px 0;transition:color .2s}
.lb-foot-col a:hover{color:var(--lb-violet)}
.lb-foot-bot{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  margin-top:clamp(36px,4vw,56px);padding-top:22px;border-top:1px solid var(--lb-line);
  font-size:12.5px;color:var(--lb-ink-4)}
.lb-foot-bot a{color:inherit;text-decoration:none}
.lb-foot-bot a:hover{color:var(--lb-ink)}
.lb-foot-bot .row{display:flex;gap:18px;flex-wrap:wrap;align-items:center}

/* ---------- 14. 内页页头 ---------- */
.lb-head{padding-top:calc(var(--lb-nav-h) + clamp(48px,7vw,88px));padding-bottom:clamp(36px,5vw,64px)}
.lb-crumb{display:flex;align-items:center;gap:9px;font-size:12.5px;color:var(--lb-ink-4);
  margin-bottom:26px;letter-spacing:.01em}
.lb-crumb a{color:var(--lb-ink-4);text-decoration:none}
.lb-crumb a:hover{color:var(--lb-ink)}
.lb-crumb span{color:var(--lb-line-2)}
.lb-head h1{max-width:20em}
.lb-head .lb-lead{max-width:38em;margin-top:22px}
.lb-head--center{text-align:center}
.lb-head--center h1,.lb-head--center .lb-lead{margin-left:auto;margin-right:auto}

/* ---------- 15. 产品矩阵页 ---------- */
.lb-pmx{display:grid;gap:18px}
.lb-pmx-row{
  display:grid;grid-template-columns:200px 1fr auto;gap:clamp(20px,3vw,40px);align-items:center;
  padding:clamp(22px,2.6vw,30px);border:1px solid var(--lb-line);border-radius:16px;background:#fff;
  text-decoration:none;color:inherit;transition:transform .35s var(--lb-ease),box-shadow .35s,border-color .3s
}
.lb-pmx-row:hover{transform:translateY(-2px);box-shadow:var(--lb-sh-md);border-color:var(--lb-line-2)}
.lb-pmx-logo{width:100%;aspect-ratio:16/9;border-radius:12px;background:var(--lb-warm);
  display:grid;place-items:center;overflow:hidden}
.lb-pmx-logo img{width:100%;height:100%;object-fit:cover}
.lb-pmx-logo .ph{font-family:var(--lb-serif);font-style:italic;font-size:26px;color:var(--lb-ink-4)}
.lb-pmx-body h3{margin:0 0 8px;font-size:21px;letter-spacing:-.025em}
.lb-pmx-body p{margin:0;font-size:14px;line-height:1.7;color:var(--lb-ink-3);max-width:42em}
.lb-pmx-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}
.lb-pmx-tags span{font-size:11.5px;color:var(--lb-ink-3);background:var(--lb-warm);
  border:1px solid var(--lb-line);border-radius:999px;padding:3px 10px}
.lb-pmx-go{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;
  color:var(--lb-ink);white-space:nowrap}

/* ---------- 16. Metis 产品页 ---------- */
.lb-mp-hero{padding-top:calc(var(--lb-nav-h) + clamp(44px,6vw,76px));padding-bottom:clamp(32px,4vw,52px)}
.lb-mp-hero-in{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,64px);align-items:center}
.lb-mp-feats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.lb-mp-feat{border:1px solid var(--lb-line);border-radius:14px;padding:22px;background:#fff;
  transition:border-color .3s,transform .35s var(--lb-ease)}
.lb-mp-feat:hover{border-color:var(--lb-violet);transform:translateY(-2px)}
.lb-mp-feat .ic{width:34px;height:34px;border-radius:10px;background:var(--lb-tint);
  display:grid;place-items:center;color:var(--lb-indigo);margin-bottom:14px}
.lb-mp-feat b{display:block;font-size:15.5px;letter-spacing:-.018em;margin-bottom:6px}
.lb-mp-feat p{margin:0;font-size:13.5px;line-height:1.65;color:var(--lb-ink-3)}

/* 长文排版 */
.lb-prose{max-width:44em}
.lb-prose h2{font-size:clamp(22px,2.2vw,28px);letter-spacing:-.025em;margin:44px 0 14px;line-height:1.3}
.lb-prose h2:first-child{margin-top:0}
.lb-prose h3{font-size:18px;letter-spacing:-.02em;margin:30px 0 10px}
.lb-prose p{margin:0 0 16px;font-size:15.5px;line-height:1.82;color:var(--lb-ink-3)}
.lb-prose ul,.lb-prose ol{margin:0 0 18px;padding-left:20px}
.lb-prose li{margin:8px 0;font-size:15.5px;line-height:1.78;color:var(--lb-ink-3)}
.lb-prose strong{color:var(--lb-ink);font-weight:700}
.lb-prose code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.9em;
  background:var(--lb-warm);padding:2px 6px;border-radius:5px}
.lb-prose blockquote{margin:24px 0;padding:16px 22px;border-left:2px solid var(--lb-violet);
  background:var(--lb-tint);border-radius:0 10px 10px 0}
.lb-prose blockquote p{margin:0;color:var(--lb-ink-2)}

/* ---------- 17. 关于 / 联系 ---------- */
.lb-about-split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,72px);align-items:center}
.lb-fig{border-radius:16px;overflow:hidden;background:var(--lb-warm);aspect-ratio:4/3}
.lb-fig img{width:100%;height:100%;object-fit:cover;display:block}

.lb-values{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.lb-value{padding:28px 0 0;border-top:1px solid var(--lb-line)}
.lb-value .n{font-family:var(--lb-serif);font-style:italic;font-size:12.5px;color:var(--lb-ink-4)}
.lb-value b{display:block;margin:12px 0 8px;font-size:17px;letter-spacing:-.02em}
.lb-value p{margin:0;font-size:14px;line-height:1.72;color:var(--lb-ink-3)}

.lb-contact{display:grid;grid-template-columns:.95fr 1.05fr;gap:clamp(32px,5vw,64px);align-items:start}
.lb-co-types{display:grid;gap:0;border-top:1px solid var(--lb-line)}
.lb-co-type{padding:20px 0;border-bottom:1px solid var(--lb-line);display:grid;
  grid-template-columns:auto 1fr;gap:16px;align-items:baseline}
.lb-co-type .n{font-family:var(--lb-serif);font-style:italic;font-size:12.5px;color:var(--lb-ink-4)}
.lb-co-type b{display:block;font-size:15.5px;letter-spacing:-.018em;margin-bottom:5px}
.lb-co-type p{margin:0;font-size:13.5px;line-height:1.65;color:var(--lb-ink-4)}
.lb-co-card{border:1px solid var(--lb-line);border-radius:18px;padding:clamp(26px,3vw,36px);background:#fff}
.lb-co-card h3{margin:0 0 6px;font-size:18px;letter-spacing:-.02em}
.lb-co-card > p{margin:0 0 22px;font-size:13.5px;color:var(--lb-ink-4)}
.lb-field{margin-bottom:14px}
.lb-field label{display:block;font-size:12.5px;font-weight:600;color:var(--lb-ink-3);margin-bottom:7px}
.lb-field input,.lb-field select,.lb-field textarea{
  width:100%;height:46px;padding:0 14px;border:1px solid var(--lb-line-2);border-radius:11px;
  background:#fff;font-family:inherit;font-size:14.5px;color:var(--lb-ink);outline:none;
  transition:border-color .2s,box-shadow .2s
}
.lb-field textarea{height:112px;padding:12px 14px;resize:vertical;line-height:1.6}
.lb-field input:focus,.lb-field select:focus,.lb-field textarea:focus{
  border-color:var(--lb-violet);box-shadow:0 0 0 3px rgba(109,75,246,.12)
}
.lb-form-note{font-size:12px;color:var(--lb-ink-4);margin:12px 0 0;line-height:1.6}
.lb-co-info{display:grid;gap:14px;margin-top:26px;padding-top:22px;border-top:1px solid var(--lb-line)}
.lb-co-info div{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:var(--lb-ink-3)}
.lb-co-info svg{flex:0 0 auto;margin-top:3px;color:var(--lb-ink-4)}
.lb-co-info a{color:var(--lb-ink-3);text-decoration:none}
.lb-co-info a:hover{color:var(--lb-violet)}

/* ---------- 18. 响应式 ---------- */
@media (max-width:1180px){
  .lb-nav-in{padding:0 24px;gap:22px}
  .lb-nav-menu > a{padding:9px 10px;font-size:14px}
  .lb-foot-grid{grid-template-columns:1.4fr repeat(2,1fr);row-gap:36px}
}
@media (max-width:1024px){
  :root{--lb-nav-h:68px}
  .lb-nav-menu,.lb-nav-acts > a.lb-nav-tx,.lb-nav-acts .lb-btn--line{display:none}
  .lb-burger{display:grid}
  .lb-nav-acts{margin-left:auto;gap:8px}
  .lb-hero-art{min-height:300px;margin-top:20px}
  .lb-hero-meta div{padding-right:24px;margin-right:24px}
  .lb-mx-main{grid-template-columns:1fr}
  .lb-mx-main-art{min-height:240px;order:-1}
  .lb-metis-in,.lb-tech,.lb-news,.lb-mp-hero-in,.lb-about-split,.lb-contact{grid-template-columns:1fr}
  .lb-dirs,.lb-exp-grid,.lb-mx-grid{grid-template-columns:1fr 1fr}
  .lb-pmx-row{grid-template-columns:150px 1fr;gap:20px}
  .lb-pmx-go{display:none}
  .lb-values{grid-template-columns:1fr}
  .lb-mp-feats{grid-template-columns:1fr}
}
@media (max-width:720px){
  :root{--lb-gut:20px}
  body.lb{font-size:15.5px}
  .lb-sec{padding:56px 0}
  .lb-hero{padding-top:calc(var(--lb-nav-h) + 40px)}
  .lb-hero-acts{flex-direction:column;align-items:stretch}
  .lb-hero-acts .lb-btn{width:100%}
  .lb-hero-meta{display:grid;grid-template-columns:1fr 1fr;gap:0;margin-top:40px}
  .lb-hero-meta div{border-right:0;margin-right:0;padding:16px 0 0}
  .lb-hero-meta div:nth-child(odd){padding-right:12px}
  .lb-dirs,.lb-exp-grid,.lb-mx-grid,.lb-foot-grid{grid-template-columns:1fr}
  .lb-models-head{flex-direction:column;align-items:flex-start;gap:14px}
  .lb-mx-main-copy,.lb-dir,.lb-exp{padding:22px}
  .lb-metis-caps{grid-template-columns:1fr}
  .lb-metis-acts .lb-btn{width:100%}
  .lb-exp-head,.lb-mx-head{flex-direction:column;align-items:flex-start;gap:16px}
  .lb-end-acts .lb-btn{width:100%}
  .lb-foot-bot{flex-direction:column;gap:12px}
  .lb-pmx-row{grid-template-columns:1fr}
  .lb-pmx-logo{aspect-ratio:16/7}
  .lb-news-hero .im{aspect-ratio:4/3}
  .lb-metis-win{margin-top:8px}
}
@media (max-width:420px){
  /* 保留两列：390px 下三项指标两列排布更紧凑，避免整块竖着拉太长 */
  .lb-hero-meta div{padding-top:14px}
  .lb-hero-meta b{font-size:20px}
}

/* ---------- 19. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  .lb-orbit-ring{animation:none}
  .lb-btn:hover,.lb-dir:hover,.lb-exp:hover,.lb-pmx-row:hover,.lb-mp-feat:hover{transform:none}
  .lb-tech-row:hover{padding-left:0}
}

/* ==========================================================================
   20. 入场动效（data-rv）
   —— 与旧版 gp-rv 同一套节奏：上移 14px + 淡入，分档 0~240ms，
      只在首屏与滚动进入时触发一次，不做无限循环
   ========================================================================== */
[data-rv]{opacity:0;transform:translateY(14px);
  transition:opacity .7s var(--lb-ease),transform .7s var(--lb-ease)}
[data-rv].is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  [data-rv]{opacity:1;transform:none;transition:none}
}

/* ==========================================================================
   21. 模型生态跑马灯（保留 v16-marquee 原组件结构与视觉）
   —— 模板仍渲染两份内容，JS 只做位移校正；悬停暂停由 JS 控制。
      这里补齐该组件在本层所需的全部样式，使其不依赖 v16-home.css。
   ========================================================================== */
.v16-marquee{position:relative;overflow:hidden;padding:4px 0}
.v16-marquee-track{display:flex;align-items:center;gap:12px;width:max-content;will-change:transform}
.v16-marquee .eco-item{
  flex:none;width:auto;min-width:118px;padding:12px 16px;border-radius:14px;
  background:#fff;border:1px solid var(--lb-line);
  display:flex;align-items:center;gap:9px;
  transition:border-color .24s,box-shadow .24s,background .24s
}
.v16-marquee .eco-item img{width:30px;height:30px;object-fit:contain;flex:0 0 auto}
.v16-marquee .eco-item b{font-size:12.5px;font-weight:600;color:var(--lb-ink-2);white-space:nowrap}
.v16-marquee .eco-item:hover{border-color:#D9CDFF;box-shadow:0 10px 26px -18px rgba(109,75,246,.5)}
/* 常驻轻微浮动，错峰相位，让区块保持「活着」但不抢注意力 */
.v16-float{animation:lb-float 3.4s cubic-bezier(.34,1.56,.64,1) infinite;
  transform-origin:center bottom;will-change:transform}
.v16-float:nth-child(4n+1){animation-delay:0s}
.v16-float:nth-child(4n+2){animation-delay:-.85s}
.v16-float:nth-child(4n+3){animation-delay:-1.7s}
.v16-float:nth-child(4n+4){animation-delay:-2.55s}
@keyframes lb-float{0%,100%{transform:translateY(0)}50%{transform:translateY(-3px)}}
@media (prefers-reduced-motion:reduce){.v16-float{animation:none}}

/* ==========================================================================
   22. 浏览器截图框（产品截图统一外壳）
   ========================================================================== */
.lb-shot{
  border-radius:14px;overflow:hidden;background:#fff;
  border:1px solid var(--lb-line);
  box-shadow:0 30px 64px -34px rgba(18,16,28,.34),0 6px 16px -10px rgba(18,16,28,.1)
}
.lb-shot-bar{
  display:flex;align-items:center;gap:6px;height:34px;padding:0 12px;
  background:#FAF9F7;border-bottom:1px solid var(--lb-line)
}
.lb-shot-bar i{width:8px;height:8px;border-radius:50%;background:#DCD7CF}
.lb-shot-bar i:nth-child(1){background:#E6C9C4}
.lb-shot-bar i:nth-child(2){background:#E8DCC0}
.lb-shot-bar i:nth-child(3){background:#CBDCC9}
.lb-shot-bar u{
  margin-left:10px;font-style:normal;font-size:10.5px;color:var(--lb-ink-4);
  background:#fff;border:1px solid var(--lb-line);border-radius:5px;padding:2px 8px;
  text-decoration:none;letter-spacing:.02em
}
.lb-shot img{display:block;width:100%;height:auto}

/* ==========================================================================
   23. Metis 工作台窗口（深色段内）
   ========================================================================== */
.lb-win{border-radius:16px;overflow:hidden;border:1px solid rgba(255,255,255,.12);background:#111318}
.lb-win-bar{display:flex;align-items:center;gap:6px;height:34px;padding:0 12px;
  background:#191C22;border-bottom:1px solid rgba(255,255,255,.07)}
.lb-win-bar i{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.16)}
.lb-win-bar u{margin-left:10px;font-style:normal;font-size:10.5px;color:rgba(255,255,255,.42);
  background:rgba(255,255,255,.05);border-radius:5px;padding:2px 8px;text-decoration:none}
.lb-win-body{display:grid;grid-template-columns:132px 1fr;min-height:268px}
.lb-win-side{padding:16px 12px;border-right:1px solid rgba(255,255,255,.07);display:flex;flex-direction:column;gap:8px}
.lb-win-side b{font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.3);margin-bottom:4px}
.lb-win-sess{font-size:12px;color:rgba(255,255,255,.55);padding:7px 9px;border-radius:7px;white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis}
.lb-win-sess.is-on{background:rgba(109,75,246,.22);color:#fff}
.lb-win-main{padding:18px 18px 20px;display:flex;flex-direction:column;gap:14px}
.lb-win-q{background:rgba(255,255,255,.06);border-radius:10px;padding:12px 14px;
  font-size:12.5px;line-height:1.6;color:rgba(255,255,255,.84)}
.lb-win-steps{display:grid;gap:7px}
.lb-win-step{display:flex;align-items:center;gap:9px;font-size:12px;color:rgba(255,255,255,.46);
  background:rgba(255,255,255,.04);border-radius:8px;padding:8px 11px;
  transition:background .4s var(--lb-ease),color .4s}
.lb-win-step em{width:16px;height:16px;border-radius:50%;border:1px solid rgba(255,255,255,.2);
  display:grid;place-items:center;font-style:normal;font-size:9px;flex:0 0 auto;
  transition:background .4s,border-color .4s,color .4s}
.lb-win-step.is-active{background:rgba(109,75,246,.2);color:#fff}
.lb-win-step.is-active em{background:var(--lb-violet);border-color:var(--lb-violet);color:#fff}
.lb-win-step.is-done{color:rgba(255,255,255,.72)}
.lb-win-step.is-done em{background:rgba(109,75,246,.5);border-color:transparent;color:#fff}
.lb-win-file{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.08);border-radius:9px;padding:10px 12px}
.lb-win-file .ic{width:26px;height:26px;border-radius:7px;background:rgba(109,75,246,.24);
  display:grid;place-items:center;color:#C9B8FF;flex:0 0 auto}
.lb-win-file .tx b{display:block;font-size:11.5px;color:#fff;font-weight:600}
.lb-win-file .tx span{font-size:10.5px;color:rgba(255,255,255,.42)}
.lb-win-bar-prog{height:4px;border-radius:3px;background:rgba(255,255,255,.1);overflow:hidden;margin-top:2px}
.lb-win-bar-prog i{display:block;height:100%;width:0%;border-radius:3px;background:var(--lb-grad);
  transition:width .5s var(--lb-ease)}

/* ==========================================================================
   24. 补充布局与响应式收口
   ========================================================================== */
.lb-btn-row{display:flex;flex-wrap:wrap;gap:12px}

@media (max-width:1024px){
  .lb-hero-grid{grid-template-columns:1fr !important}
  .lb-mp-doc,.lb-exp-doc,.lb-about-mission,.lb-about-split,.lb-mp-cta{grid-template-columns:1fr !important}
  .lb-win-body{grid-template-columns:112px 1fr}
}
@media (max-width:720px){
  .lb-form-2col{grid-template-columns:1fr !important}
  .lb-win-body{grid-template-columns:1fr}
  .lb-win-side{flex-direction:row;overflow-x:auto;border-right:0;
    border-bottom:1px solid rgba(255,255,255,.07);padding:10px 12px}
  .lb-win-side b{display:none}
  .lb-win-sess{flex:0 0 auto}
  .lb-mp-hero-in{gap:28px}
  .lb-co-card{padding:22px}
}

/* ==========================================================================
   25. 产品界面示意 · 浅色变体（复用 .lb-win 结构，纸白底）
   ========================================================================== */
.lb-win--light{
  background:#fff;border:1px solid var(--lb-line);
  box-shadow:0 24px 56px -32px rgba(18,16,28,.28),0 4px 12px -8px rgba(18,16,28,.08)
}
.lb-win--light .lb-win-bar{background:#FAF9F7;border-bottom:1px solid var(--lb-line)}
.lb-win--light .lb-win-bar i{background:#DCD7CF}
.lb-win--light .lb-win-bar i:nth-child(1){background:#E6C9C4}
.lb-win--light .lb-win-bar i:nth-child(2){background:#E8DCC0}
.lb-win--light .lb-win-bar i:nth-child(3){background:#CBDCC9}
.lb-win--light .lb-win-bar u{color:var(--lb-ink-4);background:#fff;border:1px solid var(--lb-line)}
.lb-win--light .lb-win-side{border-right-color:var(--lb-line)}
.lb-win--light .lb-win-side b{color:var(--lb-ink-4)}
.lb-win--light .lb-win-sess{color:var(--lb-ink-3)}
.lb-win--light .lb-win-sess.is-on{background:var(--lb-tint);color:var(--lb-indigo);font-weight:600}
.lb-win--light .lb-win-q{background:var(--lb-warm);color:var(--lb-ink-2)}
.lb-win--light .lb-win-step{background:var(--lb-warm);color:var(--lb-ink-3)}
.lb-win--light .lb-win-step em{border-color:var(--lb-line-2);color:var(--lb-ink-4)}
.lb-win--light .lb-win-step.is-done{color:var(--lb-ink)} 
.lb-win--light .lb-win-step.is-done em{background:var(--lb-violet);border-color:var(--lb-violet);color:#fff}
.lb-win--light .lb-win-file{background:#fff;border-color:var(--lb-line)}
.lb-win--light .lb-win-file .ic{background:var(--lb-tint);color:var(--lb-indigo)}
.lb-win--light .lb-win-file .tx b{color:var(--lb-ink)}
.lb-win--light .lb-win-file .tx span{color:var(--lb-ink-4)}
.lb-win--light .lb-win-bar-prog{background:var(--lb-warm-2)}

/* 方向卡：给右下角图形留出安全区，避免压住标题与正文 */
.lb-dir > *{position:relative;z-index:1}
.lb-dir-art{z-index:0;opacity:.85}
.lb-dir h3, .lb-dir p, .lb-dir-num{padding-right:84px}
@media (max-width:720px){ .lb-dir h3, .lb-dir p, .lb-dir-num{padding-right:56px} }

/* 关于页：文字牌替代团队照片，避免用来源不明的人像照片暗示真实团队 */
.lb-plate{
  border:1px solid var(--lb-line);border-radius:18px;background:
    linear-gradient(160deg,#FBFAFF 0%,#FFFFFF 46%,#F8F6FF 100%);
  padding:clamp(28px,3.4vw,44px);display:flex;flex-direction:column;gap:0;
  position:relative;overflow:hidden
}
.lb-plate::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(109,75,246,.14),transparent 66%)
}
.lb-plate-row{display:flex;align-items:baseline;justify-content:space-between;gap:20px;
  padding:18px 0;border-bottom:1px solid var(--lb-line);position:relative;z-index:1}
.lb-plate-row:last-child{border-bottom:0;padding-bottom:0}
.lb-plate-row b{font-size:15px;font-weight:600;letter-spacing:-.01em}
.lb-plate-row span{font-family:var(--lb-serif);font-style:italic;font-size:13px;color:var(--lb-ink-4)}
.lb-plate .k{font-size:clamp(30px,3.4vw,42px);font-weight:700;letter-spacing:-.04em;line-height:1;
  margin-bottom:6px;position:relative;z-index:1}

/* ==========================================================================
   26. 与旧层冲突的显式覆盖
   —— v5.css 有一条全局 `h1~h6{text-align:center}`（GEO 时期「全站标题居中」的
      旧规范）。新品牌采用左对齐的编辑式排版，这里用 body.lb 提升特异性覆盖它，
      只在明确需要居中的收尾段与居中页头里放行。
   ========================================================================== */
body.lb h1, body.lb h2, body.lb h3, body.lb h4, body.lb h5, body.lb h6{
  text-align:left;letter-spacing:-.025em
}
body.lb .lb-h1{letter-spacing:-.035em}
body.lb .lb-h2{letter-spacing:-.03em}
body.lb .lb-h3{letter-spacing:-.018em}

/* 居中语境 */
body.lb .lb-end-in h2,
body.lb .lb-end-in p,
body.lb .lb-end-in .lb-eyebrow,
body.lb .lb-head--center h1,
body.lb .lb-head--center .lb-lead{text-align:center}
body.lb .lb-end-in .lb-eyebrow{justify-content:center}

/* 行内强调：品牌色只用在关键词上，不做整段染色 */
body.lb .lb-serif{color:var(--lb-violet)}

/* 首屏圆环稍提对比，避免在纯白上「消失」 */
.lb-orbit-ring{border-color:#E9E4F6}
.lb-orbit-ring:nth-child(2){border-color:#DED6F2}
.lb-orbit-ring:nth-child(3){border-color:#D3C4FF;background:radial-gradient(circle,rgba(109,75,246,.05),transparent 70%)}

/* 页脚品牌标在窄屏不与栏目挤在一行 */
@media (max-width:720px){
  .lb-foot-brand{margin-bottom:8px}
}

/* ==========================================================================
   27. 深色展示段收口
   —— 左栏实际宽度约 470px，46px 的标题只放得下 10 个汉字，会把
      「让 AI 不止思考，更能行动。」拆成「…更能行 / 动。」这种孤字。
      这里把该段标题降到 34–38px，并交给 balance 做均衡断行。
   ========================================================================== */
.lb-metis h2{
  font-size:clamp(25px,2.6vw,38px)!important;
  line-height:1.22;max-width:13em;
  text-wrap:balance
}
.lb-metis .lb-lead{max-width:26em}

/* 窗口地址栏：长文案不换行、不撑破 34px 高度 */
.lb-win-bar{overflow:hidden}
.lb-win-bar u{
  flex:1 1 auto;min-width:0;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis
}
.lb-win-bar::after{content:"";flex:0 0 auto}

/* 深色段里的次要按钮在深底上要足够亮 */
.lb-metis .lb-btn--line{color:#fff;border-color:rgba(255,255,255,.3);background:transparent}

@media (max-width:1024px){
  .lb-metis h2{font-size:clamp(24px,4.6vw,32px)!important;max-width:none}
}

/* 地址栏最终排布：三个圆点在左、URL 紧随其后，超长省略 */
.lb-win-bar{justify-content:flex-start}
.lb-win-bar u{flex:0 1 auto;margin-left:10px;margin-right:auto;text-align:left}

/* 只有一个实验项目时撑满整行，避免右侧留下大片空白 */
.lb-exp-grid.is-single{grid-template-columns:1fr}
.lb-exp-grid.is-single .lb-exp{min-height:0}

/* 无封面图时的「纯文字头图」：用边框与内边距撑起视觉重量，不放占位图 */
.lb-news-hero.is-text{
  border:1px solid var(--lb-line);border-radius:16px;background:#fff;
  padding:clamp(22px,3vw,34px);
  transition:border-color .3s,box-shadow .35s var(--lb-ease)
}
.lb-news-hero.is-text:hover{border-color:var(--lb-line-2);box-shadow:var(--lb-sh-md)}
.lb-news-hero.is-text .meta{margin-top:0}

/* ==========================================================================
   28. 窄屏收口（390 / 375 实测）
   —— 问题：导航右侧「进入 Metis AI」按钮 + 品牌标 + 汉堡在 390px 下总宽超限，
      固定定位元素的溢出会把整个文档宽度撑大，导致正文与按钮被裁切。
      处理：≤720px 时导航只保留「品牌标 + 汉堡」，CTA 收进抽屉；
            并给文档加横向裁切兜底，避免任何单点溢出造成整页横滚。
   ========================================================================== */
html, body.lb{overflow-x:hidden}
body.lb{max-width:100vw}

@media (max-width:1024px){
  .lb-nav-in{padding:0 20px;gap:12px}
  .lb-nav-acts{gap:6px}
}
@media (max-width:720px){
  .lb-nav-in{padding:0 16px;gap:8px}
  /* 导航里不再放主 CTA，抽屉与页面内都有入口 */
  .lb-nav-acts > .lb-btn{display:none}
  .lb-burger{width:40px;height:40px}
  .lb-brand-mark{width:27px;height:27px;border-radius:8px}
  .lb-brand-tx b{font-size:14.5px}
  .lb-brand-tx em{font-size:10.5px}
  .lb-hero h1{font-size:clamp(30px,8.6vw,40px)}
  .lb-hero-tag{font-size:11.5px;height:auto;padding:6px 12px;line-height:1.5;
    white-space:normal;text-align:left;display:inline-flex;max-width:100%}
  .lb-hero-tag span, .lb-hero-tag{word-break:break-word}
  .lb-h1{font-size:clamp(30px,8.4vw,40px)}
  .lb-h2{font-size:clamp(24px,6.6vw,30px)}
  .lb-lead{font-size:15.5px;line-height:1.75}
  .lb-drawer a.lb-dr{font-size:16px;padding:14px 2px}
}

/* ==========================================================================
   29. AI 实验室 · 核心产品卡（Metis AI）
   —— 整张卡是「了解详情」的热区（标题链接用 ::after 铺满卡片），
      「立即体验」按钮提升层级浮在热区之上，避免嵌套 <a> 的非法结构。
   ========================================================================== */
.lb-feat{
  position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:0;
  border:1px solid var(--lb-line);border-radius:18px;overflow:hidden;background:#fff;
  transition:box-shadow .4s var(--lb-ease),border-color .3s,transform .4s var(--lb-ease)
}
.lb-feat:hover{box-shadow:var(--lb-sh-lg);border-color:var(--lb-line-2)}
.lb-feat-copy{
  padding:clamp(26px,3.2vw,42px);display:flex;flex-direction:column;justify-content:center
}
.lb-feat-title{
  margin:0 0 14px;font-size:clamp(24px,2.5vw,34px);letter-spacing:-.03em;line-height:1.2
}
.lb-feat-title a{color:var(--lb-ink);text-decoration:none}
.lb-feat-title a:hover{color:var(--lb-violet)}
/* 全卡热区：只覆盖卡片内部，不影响下方列表 */
.lb-feat-title a::after{
  content:"";position:absolute;inset:0;z-index:1;border-radius:18px;cursor:pointer
}
.lb-feat-acts{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.lb-feat-art{
  position:relative;display:flex;align-items:center;
  background:linear-gradient(160deg,#F6F3FF 0%,#EFEAFB 52%,#F8F6F2 100%);
  padding:clamp(20px,2.6vw,34px)
}
@media (max-width:1024px){
  .lb-feat{grid-template-columns:1fr}
  .lb-feat-art{order:-1}
}
@media (max-width:720px){
  .lb-feat-copy{padding:22px}
  .lb-feat-acts .lb-btn{width:100%;justify-content:center}
}

/* ==========================================================================
   30. 产品组合表（首页 Portfolio）
   —— 用「产品 / 方向 / 状态」三列的表结构表达产品线，而不是把单个产品做成大卡。
      已上线产品是普通行（可点），未发布产品是弱化行（不可点、不编名字）。
   ========================================================================== */
.lb-pf{border-top:1px solid var(--lb-line)}
.lb-pf-head{
  display:grid;grid-template-columns:1fr 160px 120px 32px;gap:20px;align-items:center;
  padding:12px 4px;font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--lb-ink-4);border-bottom:1px solid var(--lb-line)
}
.lb-pf-row{
  display:grid;grid-template-columns:1fr 160px 120px 32px;gap:20px;align-items:center;
  padding:22px 4px;border-bottom:1px solid var(--lb-line);
  text-decoration:none;color:inherit;
  transition:background .28s var(--lb-ease),padding-left .28s var(--lb-ease)
}
a.lb-pf-row:hover{background:#FCFBF9;padding-left:10px}
.lb-pf-name{display:flex;flex-direction:column;gap:5px;min-width:0}
.lb-pf-name b{font-size:clamp(17px,1.6vw,20px);font-weight:700;letter-spacing:-.025em}
.lb-pf-name em{font-style:normal;font-size:13.5px;line-height:1.6;color:var(--lb-ink-4);
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.lb-pf-cat{font-size:13.5px;color:var(--lb-ink-3)}
.lb-pf-go{display:flex;justify-content:flex-end;color:var(--lb-ink-4);transition:transform .28s var(--lb-ease),color .2s}
a.lb-pf-row:hover .lb-pf-go{color:var(--lb-violet);transform:translateX(3px)}
/* 未发布：整行弱化，鼠标不显示为可点 */
.lb-pf-row.is-soon{background:transparent;cursor:default}
.lb-pf-row.is-soon .lb-pf-name b{color:var(--lb-ink-3);font-weight:600}
.lb-pf-row.is-soon .lb-pf-name em{color:var(--lb-ink-4)}
/* 底部「还有 N 个方向」：一行说明，不是产品 */
.lb-pf-row.is-more{
  grid-template-columns:1fr auto;border-bottom:0;padding:18px 4px 0;
  font-size:13.5px;color:var(--lb-ink-4)
}
a.lb-pf-row.is-more:hover{background:transparent;padding-left:4px}
.lb-pf-more-link{display:inline-flex;align-items:center;gap:6px;color:var(--lb-ink);font-weight:600}

@media (max-width:900px){
  .lb-pf-head{display:none}
  .lb-pf-row{grid-template-columns:1fr auto;column-gap:12px;row-gap:8px;padding:18px 2px}
  .lb-pf-name{grid-column:1;grid-row:1}
  .lb-pf-go{grid-column:2;grid-row:1;align-self:center}
  .lb-pf-row .lb-st{grid-column:1;grid-row:2;justify-self:start}
  .lb-pf-cat{grid-column:2;grid-row:2;justify-self:end;font-size:12px;color:var(--lb-ink-4)}
  .lb-pf-row.is-more{grid-template-columns:1fr auto;padding-top:16px}
}

/* ==========================================================================
   31. 深色段 · 产品流水线
   ========================================================================== */
.lb-pipe{list-style:none;margin:0;padding:0;display:grid;gap:0}
.lb-pipe-step{
  display:grid;grid-template-columns:110px 96px 1fr;gap:18px;align-items:baseline;
  padding:18px 0;border-bottom:1px solid rgba(255,255,255,.1)
}
.lb-pipe-step:first-child{border-top:1px solid rgba(255,255,255,.1)}
.lb-pipe-k{font-family:var(--lb-serif);font-style:italic;font-size:13px;color:rgba(255,255,255,.42)}
.lb-pipe-t{font-size:15px;font-weight:600;color:#fff}
.lb-pipe-d{font-size:13px;line-height:1.65;color:rgba(255,255,255,.52)}
@media (max-width:720px){
  .lb-pipe-step{grid-template-columns:1fr;gap:6px;padding:16px 0}
  .lb-pipe-k{font-size:12px}
}