/* KKOS design system — extracted verbatim from kkos-ai.html. Zero external deps. */
  :root{
    --bg:#07080d; --bg-2:#0c0e15; --panel:rgba(15,18,28,.72);
    --text:#e7ecf3; --soft:#9aa6b8; --mute:#5a6678;
    --line:rgba(120,160,255,.16); --line-strong:rgba(120,160,255,.5);
    --accent:#5b8dff; --accent-2:#9d6cff; --accent-3:#22d3ee;
    --hot:#ff8a4c;
  }
  *{box-sizing:border-box}
  html,body{margin:0;padding:0}
  body{
    background:var(--bg); color:var(--text);
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC","PingFang SC","Microsoft YaHei",Helvetica,Arial,sans-serif;
    -webkit-font-smoothing:antialiased; overflow-x:hidden;
  }
  a{color:inherit}
  .wrap{max-width:1180px;margin:0 auto;padding:0 22px}

  /* ---------- 导航 ---------- */
  nav.top{
    position:sticky;top:0;z-index:50;
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    background:rgba(7,8,13,.72);border-bottom:1px solid var(--line);
  }
  .nav-in{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
  .logo{display:flex;align-items:center;gap:9px;font-weight:800;letter-spacing:-.02em;text-decoration:none;font-size:16px}
  .logo-mark{
    width:26px;height:26px;border-radius:8px;flex:0 0 auto;
    background:linear-gradient(135deg,var(--accent),var(--accent-2));
    box-shadow:0 0 18px rgba(120,140,255,.45);
  }
  .nav-links{display:flex;gap:26px;font-size:14px;color:var(--soft)}
  .nav-links a{text-decoration:none;transition:color .18s}
  .nav-links a:hover{color:var(--text)}
  .nav-links a.active{color:var(--text);font-weight:700}
  .nav-right{display:flex;align-items:center;gap:12px}
  .lang-switch{display:flex;border:1px solid var(--line);border-radius:9px;overflow:hidden}
  .lang-switch button{
    background:transparent;border:0;color:var(--soft);font-size:12px;padding:5px 10px;cursor:pointer;font-weight:700;
  }
  .lang-switch button.active{background:rgba(120,160,255,.16);color:var(--text)}
  .nav-signin{font-size:14px;font-weight:600;color:var(--soft);text-decoration:none;padding:8px 14px;border:1px solid var(--line);border-radius:10px;white-space:nowrap}
  .nav-signin:hover{color:var(--text);border-color:var(--line-strong)}
  .nav-cta{
    font-size:14px;font-weight:700;text-decoration:none;padding:9px 18px;border-radius:10px;color:#fff;white-space:nowrap;
    background:linear-gradient(90deg,var(--accent),var(--accent-2));box-shadow:0 6px 24px rgba(110,110,255,.32)
  }
  @media(max-width:880px){.nav-links{display:none}}
  /* 窄屏导航压缩：避免 "Sign in" 换成两行 */
  @media(max-width:560px){
    .nav-in{gap:10px;height:58px}
    .logo{font-size:15px;gap:7px}
    .nav-right{gap:8px}
    .lang-switch button{padding:5px 7px;font-size:11.5px}
    .nav-signin{padding:7px 11px;font-size:13px}
    .nav-cta{padding:8px 13px;font-size:13px}
  }

  /* ---------- 顶部滚动进度（BTCB/cool 式滚动反馈） ---------- */
  .scroll-progress{
    position:fixed;top:0;left:0;height:2px;width:0;z-index:80;
    background:linear-gradient(90deg,var(--accent),var(--accent-2) 52%,var(--accent-3));
    box-shadow:0 0 12px rgba(120,140,255,.6);transition:width .08s linear;
    pointer-events:none;
  }

  /* ---------- Hero ---------- */
  .hero{position:relative;padding:64px 0 34px;overflow:hidden}
  /* 背景照片层（inset 上下各留余量供视差位移，不露白边） */
  .hero-photo{
    position:absolute;inset:-5% 0 auto 0;height:114%;pointer-events:none;z-index:0;
    background:#023046 url('../img/kkos-bg.jpg') center 30%/cover no-repeat;
    opacity:.94;filter:saturate(1.06);
    -webkit-mask-image:linear-gradient(180deg,#000 0%,#000 72%,transparent 100%);
    mask-image:linear-gradient(180deg,#000 0%,#000 72%,transparent 100%);
    will-change:transform
  }
  @media(min-width:761px) and (max-width:1200px){ .hero-photo{background-image:url('../img/kkos-bg-1100.jpg')} }
  @media(max-width:760px){ .hero-photo{background-image:url('../img/kkos-bg-760.jpg');background-position:center 22%;opacity:.8} }
  /* 文字衬底：左列压暗保证标题/正文可读，右侧留亮把照片让出来，底部过渡到页面底色 */
  .hero-scrim{
    position:absolute;inset:0;pointer-events:none;z-index:0;
    background:
      linear-gradient(90deg,rgba(7,8,13,.95) 0%,rgba(7,8,13,.86) 26%,rgba(7,8,13,.30) 56%,rgba(7,8,13,.62) 100%),
      linear-gradient(180deg,rgba(7,8,13,.26) 0%,rgba(7,8,13,.06) 30%,rgba(7,8,13,.12) 54%,rgba(7,8,13,.84) 86%,var(--bg) 100%)
  }
  .hero-bg{
    position:absolute;inset:-20% -10% auto -10%;height:760px;pointer-events:none;z-index:1;
    background:
      radial-gradient(600px 300px at 18% 10%,rgba(91,141,255,.22),transparent 62%),
      radial-gradient(520px 300px at 78% 4%,rgba(157,108,255,.20),transparent 62%),
      radial-gradient(420px 260px at 50% 42%,rgba(34,211,238,.10),transparent 66%);
  }
  .hero-grid{
    position:absolute;inset:0;pointer-events:none;opacity:.5;z-index:1;
    background-image:linear-gradient(rgba(120,160,255,.07) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(120,160,255,.07) 1px,transparent 1px);
    background-size:48px 48px;
    mask-image:radial-gradient(680px 420px at 50% 22%,#000 25%,transparent 78%);
    -webkit-mask-image:radial-gradient(680px 420px at 50% 22%,#000 25%,transparent 78%);
  }
  .hero-in{position:relative;z-index:3;display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,1fr);gap:38px;align-items:center}
  @media(max-width:1000px){.hero-in{grid-template-columns:1fr;gap:28px}}
  .badge{
    display:inline-flex;align-items:center;gap:8px;padding:6px 13px;border:1px solid var(--line-strong);
    border-radius:999px;font-size:11.5px;letter-spacing:.09em;color:var(--soft);font-weight:700;text-transform:uppercase
  }
  .pulse{width:6px;height:6px;border-radius:50%;background:var(--accent-3);box-shadow:0 0 10px var(--accent-3);animation:pulse 1.6s infinite}
  @keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.42;transform:scale(.78)}}
  h1.title{
    margin:18px 0 14px;font-size:clamp(34px,5.1vw,60px);line-height:1.05;font-weight:850;letter-spacing:-.035em
  }
  .grad{background:linear-gradient(96deg,var(--accent),var(--accent-2) 55%,var(--accent-3));-webkit-background-clip:text;background-clip:text;color:transparent}
  .lead{font-size:17px;line-height:1.7;color:var(--soft);margin:0 0 12px;max-width:620px}
  .lead strong{color:var(--text)}
  .sub{font-size:13.5px;line-height:1.75;color:var(--mute);margin:0 0 26px;max-width:620px}
  .cta-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
  .btn-primary{
    display:inline-flex;align-items:center;gap:9px;text-decoration:none;color:#fff;font-weight:800;font-size:15px;
    padding:14px 26px;border-radius:13px;background:linear-gradient(90deg,var(--accent),var(--accent-2));
    box-shadow:0 10px 34px rgba(110,110,255,.34);transition:transform .16s,box-shadow .16s
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 42px rgba(110,110,255,.46)}
  .btn-ghost{
    display:inline-flex;align-items:center;gap:8px;text-decoration:none;color:var(--text);font-weight:700;font-size:14.5px;
    padding:13px 22px;border-radius:13px;border:1px solid var(--line-strong);background:rgba(120,160,255,.05)
  }
  .btn-ghost:hover{background:rgba(120,160,255,.12)}
  .hint-line{font-size:12.5px;color:var(--mute)}

  /* ---------- 画布面板 ---------- */
  .stage{
    position:relative;border:1px solid var(--line);border-radius:18px;overflow:hidden;
    background:linear-gradient(180deg,rgba(13,16,26,.84),rgba(9,11,18,.88));
    backdrop-filter:blur(10px) saturate(1.1);-webkit-backdrop-filter:blur(10px) saturate(1.1);
    box-shadow:0 24px 70px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.05)
  }
  .stage-head{
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    padding:11px 14px;border-bottom:1px solid var(--line);font-size:11.5px;letter-spacing:.1em;
    color:var(--soft);text-transform:uppercase;font-weight:700
  }
  .stage-head .live{display:inline-flex;align-items:center;gap:7px;color:var(--accent-3)}
  .stage-head .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-3);box-shadow:0 0 9px var(--accent-3);animation:pulse 1.5s infinite}
  .cwrap{position:relative;width:100%;overflow:hidden}
  .cwrap.hero{aspect-ratio:16/10}
  .cwrap.big{aspect-ratio:21/9}
  canvas{position:absolute;inset:0;display:block;width:100%;height:100%}
  .stage-foot{
    display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
    padding:10px 14px;border-top:1px solid var(--line);font-size:11.5px;color:var(--mute)
  }
  .legend{display:flex;align-items:center;gap:8px}
  .legend .ramp{width:110px;height:8px;border-radius:4px;
    background:linear-gradient(90deg,#080a14,#101a42,#2442a8,#5b8dff,#9d6cff,#22d3ee,#ecf6ff)}
  .kpis{display:flex;flex-wrap:wrap;gap:8px;padding:12px 14px 14px}
  .kpi{
    flex:1 1 96px;min-width:88px;border:1px solid var(--line);border-radius:11px;padding:9px 11px;background:rgba(120,160,255,.045)
  }
  .kpi b{display:block;font-size:17px;letter-spacing:-.02em}
  .kpi span{font-size:10.5px;color:var(--mute);letter-spacing:.06em;text-transform:uppercase}

  /* ---------- 右侧章节索引（长页导航，≥1200px 才显示） ---------- */
  .dotrail{
    position:fixed;right:20px;top:50%;transform:translateY(-50%);z-index:60;
    display:flex;flex-direction:column;gap:13px;padding:13px 10px;
    border:1px solid var(--line);border-radius:999px;background:rgba(7,8,13,.62);
    backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)
  }
  .dotrail a{
    position:relative;display:block;width:9px;height:9px;border-radius:50%;
    background:rgba(120,160,255,.22);border:1px solid rgba(120,160,255,.35);
    transition:background .2s,transform .2s,box-shadow .2s
  }
  .dotrail a:hover{background:rgba(120,160,255,.55)}
  .dotrail a.on{
    background:linear-gradient(135deg,var(--accent),var(--accent-2));border-color:transparent;
    transform:scale(1.3);box-shadow:0 0 12px rgba(120,140,255,.7)
  }
  .dotrail a span{
    position:absolute;right:21px;top:50%;transform:translateY(-50%);white-space:nowrap;
    font-size:11.5px;font-weight:700;color:var(--soft);background:rgba(7,8,13,.92);
    border:1px solid var(--line);border-radius:8px;padding:4px 9px;
    opacity:0;pointer-events:none;transition:opacity .18s
  }
  .dotrail a:hover span{opacity:1}
  @media(max-width:1200px){.dotrail{display:none}}

  /* ---------- 通用 section ---------- */
  section{padding:76px 0}
  section[id]{scroll-margin-top:82px}   /* 锚点跳转时避开 sticky 导航 */
  .sec-tag{font-size:11.5px;letter-spacing:.14em;color:var(--accent-3);font-weight:800;text-transform:uppercase}
  h2.sec{margin:12px 0 12px;font-size:clamp(25px,3.4vw,38px);line-height:1.16;font-weight:820;letter-spacing:-.025em}
  p.sec-sub{margin:0 0 40px;color:var(--soft);font-size:15.5px;line-height:1.75;max-width:800px}

  .cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
  @media(max-width:960px){.cards{grid-template-columns:1fr 1fr}}
  @media(max-width:640px){.cards{grid-template-columns:1fr}}
  .card{
    position:relative;border:1px solid var(--line);border-radius:16px;padding:22px 20px;overflow:hidden;
    background:linear-gradient(180deg,rgba(15,18,28,.72),rgba(10,12,20,.72));
    transition:border-color .2s,transform .2s
  }
  .card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
  .card::after{
    content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .25s;
    background:radial-gradient(280px 190px at var(--mx,50%) var(--my,0%),rgba(91,141,255,.22),transparent 68%)
  }
  .card:hover::after{opacity:1}
  /* 级联进场：同组内依次延迟，避免整块同时弹入 */
  .cards>.reveal:nth-child(2),.steps>.reveal:nth-child(2){transition-delay:.07s}
  .cards>.reveal:nth-child(3),.steps>.reveal:nth-child(3){transition-delay:.14s}
  .cards>.reveal:nth-child(4),.steps>.reveal:nth-child(4){transition-delay:.21s}
  .cards>.reveal:nth-child(5),.steps>.reveal:nth-child(5){transition-delay:.28s}
  .cards>.reveal:nth-child(6),.steps>.reveal:nth-child(6){transition-delay:.35s}
  .card .ico{
    width:40px;height:40px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:19px;
    background:linear-gradient(135deg,rgba(91,141,255,.26),rgba(157,108,255,.22));border:1px solid var(--line)
  }
  .card h3{margin:14px 0 8px;font-size:16.5px;letter-spacing:-.01em}
  .card p{margin:0;color:var(--soft);font-size:13.5px;line-height:1.72}
  .card ul{margin:10px 0 0;padding-left:17px;color:var(--mute);font-size:12.5px;line-height:1.85}

  .modes{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 16px}
  .mode-btn{
    border:1px solid var(--line);background:rgba(120,160,255,.05);color:var(--soft);
    font-size:12.5px;font-weight:700;padding:8px 15px;border-radius:999px;cursor:pointer;transition:.16s
  }
  .mode-btn:hover{color:var(--text);border-color:var(--line-strong)}
  .mode-btn.active{color:#fff;border-color:transparent;background:linear-gradient(90deg,var(--accent),var(--accent-2))}

  .trait-strip{display:grid;grid-template-columns:repeat(11,minmax(0,1fr));gap:7px;margin-top:16px}
  @media(max-width:900px){.trait-strip{grid-template-columns:repeat(4,minmax(0,1fr))}}
  .trait{border:1px solid var(--line);border-radius:11px;padding:9px 8px;background:rgba(10,12,20,.6)}
  .trait .tname{font-size:9.5px;color:var(--mute);letter-spacing:.05em;text-transform:uppercase;line-height:1.3;height:24px;overflow:hidden}
  .trait .tv{font-size:15px;font-weight:800;margin:5px 0 6px;letter-spacing:-.02em}
  .trait .tbar{height:4px;border-radius:3px;background:rgba(120,160,255,.13);overflow:hidden}
  .trait .tfill{height:100%;width:0;border-radius:3px;transition:width .45s ease,background .45s ease}

  .steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
  @media(max-width:900px){.steps{grid-template-columns:1fr 1fr}}
  @media(max-width:560px){.steps{grid-template-columns:1fr}}
  .step{border:1px solid var(--line);border-radius:15px;padding:20px 18px;background:rgba(12,14,22,.72)}
  .step .n{
    font-size:12px;font-weight:800;color:var(--accent-3);letter-spacing:.14em;margin-bottom:10px
  }
  .step h4{margin:0 0 8px;font-size:15.5px}
  .step p{margin:0;font-size:13px;color:var(--soft);line-height:1.7}

  /* ---------- API 区 ---------- */
  .api-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:30px;align-items:start}
  @media(max-width:960px){.api-grid{grid-template-columns:1fr}}
  .api-list{list-style:none;margin:0;padding:0}
  .api-list li{
    display:flex;gap:12px;padding:14px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--soft);line-height:1.7
  }
  .api-list li b{color:var(--text)}
  .api-list .num{
    flex:0 0 24px;height:24px;border-radius:8px;display:flex;align-items:center;justify-content:center;
    font-size:11.5px;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2))
  }
  pre.code{
    margin:0;border:1px solid var(--line);border-radius:14px;padding:16px 18px;overflow:auto;
    background:#080a11;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px;line-height:1.75;color:#cfd9ea
  }
  pre.code .c{color:#5a6678}
  pre.code .k{color:#9d6cff}
  pre.code .s{color:#22d3ee}
  code.inline{
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px;
    background:rgba(120,160,255,.11);border:1px solid var(--line);border-radius:6px;padding:1.5px 6px;color:#cfe0ff
  }
  .callout{
    margin-top:14px;border:1px solid var(--line);border-left:3px solid var(--accent-3);border-radius:11px;
    padding:13px 15px;font-size:13px;color:var(--soft);background:rgba(34,211,238,.05);line-height:1.7
  }

  /* ---------- 结尾 CTA ---------- */
  .band{
    position:relative;border:1px solid var(--line);border-radius:22px;padding:46px 34px;overflow:hidden;text-align:center;
    background-color:#023046;
    background-image:
      linear-gradient(120deg,rgba(9,12,20,.86),rgba(9,12,20,.78) 52%,rgba(9,12,20,.90)),
      linear-gradient(120deg,rgba(91,141,255,.18),rgba(157,108,255,.16) 52%,rgba(34,211,238,.13)),
      url('../img/kkos-bg.jpg');
    background-size:auto,auto,cover;
    background-position:center,center,center 44%;
    background-repeat:no-repeat,no-repeat,no-repeat
  }
  .band::before{
    content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
    background-image:linear-gradient(rgba(120,160,255,.09) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(120,160,255,.09) 1px,transparent 1px);
    background-size:40px 40px;
    mask-image:radial-gradient(560px 260px at 50% 50%,#000,transparent 76%);
    -webkit-mask-image:radial-gradient(560px 260px at 50% 50%,#000,transparent 76%);
  }
  .band h2{position:relative;margin:0 0 12px;font-size:clamp(24px,3.2vw,36px);font-weight:830;letter-spacing:-.025em}
  .band p{position:relative;margin:0 auto 26px;max-width:620px;color:var(--soft);font-size:15px;line-height:1.75}
  .band .cta-row{position:relative;justify-content:center}

  footer{border-top:1px solid var(--line);padding:34px 0 46px;color:var(--mute);font-size:12.5px}
  .foot-in{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center}
  .foot-in a{color:var(--soft);text-decoration:none;margin-right:16px}
  .foot-in a:hover{color:var(--text)}

  /* 渐进式揭示：默认可见（无 JS / 脚本异常时内容不会消失），仅当 JS 生效后才启用动画 */
  .reveal{opacity:1;transform:none}
  html.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
  html.js .reveal.in{opacity:1;transform:none}
  @media (prefers-reduced-motion: reduce){
    html.js .reveal{opacity:1;transform:none;transition:none}
  }

  /* ---------- P0 · 首屏价值标题（长句，收一点字号） ---------- */
  .hero h1.title{font-size:clamp(30px,4.3vw,52px);text-wrap:balance}
  .stage-note{margin:10px 2px 0;font-size:11px;color:var(--mute);line-height:1.6}
  .hero .lead{margin:0 0 22px}
  .hero .lead strong{color:var(--text)}

  /* ---------- P0 · 量化承诺条 ---------- */
  .promise-sec{padding:38px 0 18px;border-top:1px solid var(--line)}
  .promise-sec p.sec-sub{margin-bottom:10px}
  .promise{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:12px;margin-top:20px}
  @media(max-width:1040px){.promise{grid-template-columns:repeat(3,minmax(0,1fr))}}
  @media(max-width:600px){.promise{grid-template-columns:1fr 1fr}}
  .pcard{border:1px solid var(--line);border-radius:14px;padding:16px 15px;
    background:linear-gradient(180deg,rgba(15,18,28,.72),rgba(10,12,20,.72))}
  .pcard b{display:block;font-size:clamp(19px,2.2vw,25px);font-weight:850;letter-spacing:-.03em;line-height:1.12;
    background:linear-gradient(96deg,var(--accent),var(--accent-2) 58%,var(--accent-3));
    -webkit-background-clip:text;background-clip:text;color:transparent}
  .pcard span{display:block;margin-top:7px;font-size:12px;color:var(--soft);line-height:1.6}
  .pnote{margin:14px 0 0;font-size:12px;color:var(--mute);line-height:1.7}

  /* ---------- P0 · 三层质量模型 ---------- */
  .layers{display:flex;flex-direction:column;gap:18px;margin-top:4px}
  .layer{position:relative;border:1px solid var(--line);border-radius:18px;padding:22px 20px 20px;
    background:linear-gradient(180deg,rgba(13,16,26,.62),rgba(9,11,18,.6))}
  .layer.l3{border-color:rgba(157,108,255,.36)}
  .layer.l1{border-color:rgba(120,160,255,.2)}
  .layer-head{display:flex;align-items:center;gap:14px}
  .layer-rank{flex:0 0 auto;width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
    font-weight:850;font-size:14px;color:#fff;border:1px solid var(--line-strong);
    background:linear-gradient(135deg,rgba(91,141,255,.55),rgba(157,108,255,.5))}
  .layer-kicker{font-size:11px;letter-spacing:.13em;font-weight:800;color:var(--accent-3);text-transform:uppercase}
  .layer-head h3{margin:4px 0 0;font-size:19px;letter-spacing:-.015em}
  .layer-note{margin:12px 0 16px;font-size:13.5px;color:var(--soft);line-height:1.72;max-width:900px}
  .layer-note strong{color:var(--text)}
  .layer .cards{margin-top:0}
  @media(max-width:640px){.layer{padding:18px 15px 16px}}

  /* ---------- P0 · 信任四格 ---------- */
  .trust-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:6px}
  @media(max-width:960px){.trust-grid{grid-template-columns:1fr 1fr}}
  @media(max-width:560px){.trust-grid{grid-template-columns:1fr}}
  .tcard{border:1px solid var(--line);border-radius:16px;padding:20px 18px;
    background:linear-gradient(180deg,rgba(15,18,28,.72),rgba(10,12,20,.72))}
  .tcard .ti{width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:18px;
    background:linear-gradient(135deg,rgba(91,141,255,.26),rgba(157,108,255,.22));border:1px solid var(--line)}
  .tcard h3{margin:13px 0 7px;font-size:16px}
  .tcard p{margin:0;font-size:13px;color:var(--soft);line-height:1.7}
  .tcard .own{margin-top:10px;font-size:10.5px;letter-spacing:.11em;font-weight:800;color:var(--accent-3);text-transform:uppercase}

  /* ---------- P0 · 热力图「如何阅读」 ---------- */
  .howto{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:16px}
  @media(max-width:760px){.howto{grid-template-columns:1fr}}
  .howto div{border:1px dashed var(--line);border-radius:12px;padding:13px 14px;font-size:12.5px;color:var(--soft);line-height:1.68}
  .howto b{color:var(--text);display:block;margin-bottom:5px;font-size:12.5px}

  /* ---------- P1 · 11 维定义面板 ---------- */
  .dimpanel{margin-top:16px;border:1px solid var(--line);border-radius:16px;
    background:linear-gradient(180deg,rgba(15,18,28,.6),rgba(10,12,20,.6));overflow:hidden}
  .dimpanel > summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:750;font-size:14.5px;
    display:flex;align-items:center;justify-content:space-between;gap:12px}
  .dimpanel > summary::-webkit-details-marker{display:none}
  .dimpanel > summary .arw{transition:transform .2s;color:var(--soft);font-size:12px}
  .dimpanel[open] > summary .arw{transform:rotate(180deg)}
  .dimgrid{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--line)}
  @media(max-width:760px){.dimgrid{grid-template-columns:1fr}}
  .dim{padding:14px 18px;border-bottom:1px solid var(--line);display:flex;gap:12px;align-items:flex-start}
  .dim:nth-child(odd){border-right:1px solid var(--line)}
  @media(max-width:760px){.dim:nth-child(odd){border-right:0}}
  .dim .dn{flex:0 0 auto;width:26px;height:26px;border-radius:8px;display:flex;align-items:center;justify-content:center;
    font-size:11px;font-weight:850;color:var(--accent-3);background:rgba(34,211,238,.10);border:1px solid rgba(34,211,238,.25)}
  .dim .dt{font-size:13.5px;font-weight:750;margin:0 0 4px}
  .dim .dq{margin:0;font-size:12.5px;color:var(--soft);line-height:1.62}
  .dimnote{margin:0;padding:13px 18px;font-size:12px;color:var(--mute);line-height:1.65;border-top:1px solid var(--line)}

/* ===================== 三级页面组件（新增） ===================== */
.crumb{max-width:1100px;margin:0 auto;padding:20px 24px 0;font-size:12.5px;color:var(--mute);
  display:flex;gap:9px;align-items:center;flex-wrap:wrap}
.crumb a{color:var(--soft)}.crumb a:hover{color:var(--text)}
.crumb .sep{opacity:.45}
.pagehead{padding:20px 0 8px}
.pagehead .wrap{max-width:1100px}
.pagehead h1{font-size:clamp(27px,3.8vw,42px);line-height:1.16;font-weight:800;letter-spacing:-.02em;margin:12px 0 14px}
.pagehead .lead2{font-size:16px;line-height:1.78;color:var(--soft);max-width:840px}
.layer-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{display:inline-flex;align-items:center;gap:7px;padding:8px 14px;border-radius:99px;
  border:1px solid var(--line);background:rgba(12,14,22,.7);font-size:12.6px;color:var(--soft);
  text-decoration:none;transition:all .2s}
.chip:hover{border-color:var(--line-strong);color:var(--text);transform:translateY(-1px)}
.chip::before{content:'◆';font-size:8px;color:var(--accent-3);opacity:.9}
.layer-go{display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-size:13px;
  font-weight:650;color:var(--accent-3);text-decoration:none;transition:gap .2s}
.layer-go:hover{gap:12px}
.explore-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:26px}
.ecard{display:flex;flex-direction:column;gap:9px;padding:22px 20px;border:1px solid var(--line);
  border-radius:18px;background:rgba(12,14,22,.7);text-decoration:none;transition:transform .22s,border-color .22s}
.ecard:hover{transform:translateY(-3px);border-color:var(--line-strong)}
.ecard .ei{font-size:20px;line-height:1}
.ecard h3{font-size:15px;font-weight:650;line-height:1.35}
.ecard p{font-size:12.6px;line-height:1.66;color:var(--soft);flex:1}
.ecard .eg{font-size:12.5px;font-weight:650;color:var(--accent-3)}
.consent-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:22px}
.citem{padding:18px;border:1px solid var(--line);border-radius:15px;background:rgba(12,14,22,.72)}
.citem .ct{font-size:14px;font-weight:650;display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.citem .cd{font-size:12.5px;line-height:1.68;color:var(--soft);margin-top:9px}
.req,.opt,.mode{font-size:10px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  padding:3px 8px;border-radius:99px;white-space:nowrap}
.req{background:rgba(91,141,255,.16);color:#a5b4fc;border:1px solid rgba(91,141,255,.35)}
.opt{background:rgba(120,160,255,.07);color:var(--mute);border:1px solid var(--line)}
.mode{background:rgba(34,211,238,.12);color:#7dd3fc;border:1px solid rgba(34,211,238,.32)}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin-top:22px}
.fact{padding:20px 18px;border:1px solid var(--line);border-radius:15px;background:rgba(10,12,20,.6)}
.fact b{display:block;font-size:24px;font-weight:800;letter-spacing:-.015em;margin-bottom:8px;
  background:linear-gradient(135deg,var(--accent),var(--accent-3));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.fact span{font-size:12.5px;line-height:1.62;color:var(--soft)}
.nextrow{display:flex;gap:14px;flex-wrap:wrap;justify-content:space-between;align-items:center;
  margin-top:40px;padding-top:24px;border-top:1px solid var(--line)}
.nextrow .nl{font-size:12.5px;color:var(--mute)}
.nextrow .nx{display:flex;gap:10px;flex-wrap:wrap}
.bm-btn{border:1px solid var(--line);background:rgba(120,160,255,.05);color:var(--soft);font-size:12.5px;
  font-weight:700;padding:8px 15px;border-radius:999px;cursor:pointer;transition:.16s}
.bm-btn:hover{color:var(--text);border-color:var(--line-strong)}
.bm-btn.active{color:#fff;border-color:transparent;background:linear-gradient(90deg,var(--accent),var(--accent-2))}
.bm-pane{margin-top:20px}
.bm-pane textarea{width:100%;min-height:120px;resize:vertical;font-family:inherit;font-size:14px;
  background:rgba(8,10,17,.72);border:1px solid var(--line);border-radius:13px;color:var(--text);padding:13px 15px}
.bm-out{margin-top:14px;font-size:13.5px;line-height:1.75;color:var(--soft)}
.bm-out code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:rgba(120,160,255,.12);
  padding:2px 7px;border-radius:6px;color:#a5f3fc}
.bm-out a{color:#a5b4fc;text-decoration:underline}
.bm-note{font-size:12.5px;color:var(--mute);margin-top:10px;line-height:1.65}
.bm-card{margin-top:6px;background:rgba(12,14,22,.66);border:1px solid var(--line);border-radius:20px;padding:26px}
@media(max-width:1080px){.nav-links{gap:16px;font-size:13px}}
@media(max-width:1024px){
  .explore-grid{grid-template-columns:1fr 1fr}
  .consent-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .explore-grid,.consent-grid{grid-template-columns:1fr}
  .pagehead h1{font-size:25px}
  .crumb{padding:16px 18px 0}
}