/* roulang page: index */
:root{
    --ink-900:#0C0F0C; --ink-700:#2A2F2A; --ink-500:#5E665E; --ink-300:#A8AFA6;
    --paper-0:#F6F3EC; --paper-1:#FFFFFF; --paper-2:#EAE5DA; --line:#DDD8CB;
    --accent:#CBFF3C; --accent-ink:#0C0F0C; --signal:#E2542B;
    --r-card:20px; --r-pill:999px; --r-img:16px; --r-badge:12px;
    --shadow-card:0 0 0 1px var(--line), 0 1px 2px rgba(12,15,12,.04);
    --shadow-lift:0 18px 40px -20px rgba(12,15,12,.28);
    --ease:cubic-bezier(.22,.61,.36,1);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:110px}
  body{
    margin:0;background:var(--paper-0);color:var(--ink-900);
    font-family:'HarmonyOS Sans SC','OPPO Sans','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
    font-size:16px;line-height:1.8;letter-spacing:.01em;
    font-variant-numeric:tabular-nums;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block}
  button,input{font:inherit;color:inherit}
  button{background:none;border:0;cursor:pointer;padding:0}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--ink-900);outline-offset:2px;border-radius:8px}

  .progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:90;transition:width .1s linear}

  .container-x{max-width:1240px;margin:0 auto;padding:0 20px}
  @media (min-width:1024px){ .container-x{padding:0 32px} }

  /* ---------- 导航 Dock ---------- */
  .dock{
    position:fixed;top:16px;left:0;right:0;margin:0 auto;
    width:calc(100% - 32px);max-width:1080px;height:64px;
    display:flex;align-items:center;justify-content:space-between;
    padding:0 10px 0 20px;border-radius:var(--r-pill);
    background:rgba(246,243,236,.86);
    -webkit-backdrop-filter:blur(14px) saturate(1.1);
    backdrop-filter:blur(14px) saturate(1.1);
    border:1px solid var(--line);
    box-shadow:0 12px 32px -20px rgba(12,15,12,.35);
    z-index:60;transition:height .2s var(--ease),top .2s var(--ease);
  }
  .dock.is-scrolled{top:8px;height:56px}
  .brand{display:flex;flex-direction:column;line-height:1;padding-right:8px}
  .brand__main{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
  .brand__sub{font-size:11px;letter-spacing:.1em;color:var(--ink-500);margin-top:3px;white-space:nowrap}
  .dock__links{display:none;align-items:center;gap:2px}
  @media (min-width:1024px){ .dock__links{display:flex} }
  .dock__link{position:relative;padding:9px 14px;font-size:15px;color:var(--ink-700);border-radius:var(--r-pill);transition:color .18s var(--ease)}
  .dock__link:hover{color:var(--ink-900)}
  .dock__link.is-active{color:var(--ink-900);font-weight:700}
  .dock__link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;background:var(--accent);border-radius:2px}
  .dock__actions{display:flex;align-items:center;gap:8px}
  .icon-btn{
    width:40px;height:40px;border-radius:var(--r-pill);border:1px solid var(--line);
    display:grid;place-items:center;color:var(--ink-700);
    transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
  }
  .icon-btn:hover{border-color:var(--ink-900);color:var(--ink-900)}
  .dock__search{display:flex;align-items:center;width:0;overflow:hidden;transition:width .24s var(--ease)}
  .dock__search input{
    width:100%;height:40px;border-radius:var(--r-pill);border:1px solid var(--line);
    background:var(--paper-1);padding:0 16px;font-size:14px;
  }
  .dock__search input::placeholder{color:var(--ink-300)}
  .dock__search.is-open{width:230px}
  @media (max-width:1023px){ .dock__search{display:none} }
  .dock__cta{display:none}
  @media (min-width:640px){ .dock__cta{display:inline-flex;height:40px;padding:0 20px} }
  .dock__burger{display:grid}
  @media (min-width:1024px){ .dock__burger{display:none} }

  .drawer{
    position:fixed;inset:0;z-index:80;background:var(--paper-0);
    padding:92px 20px 32px;display:flex;flex-direction:column;
    opacity:0;transform:translateY(-10px);pointer-events:none;
    transition:opacity .24s var(--ease),transform .24s var(--ease);
  }
  .drawer.is-open{opacity:1;transform:none;pointer-events:auto}
  .drawer__link{
    display:flex;align-items:center;justify-content:space-between;
    font-size:22px;font-weight:700;padding:18px 0;border-bottom:1px solid var(--line);
  }
  .drawer__link.is-active{color:var(--ink-900)}
  .drawer__link.is-active span:first-child{position:relative}
  .drawer__link.is-active span:first-child::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:3px;background:var(--accent);border-radius:3px}
  .drawer__foot{margin-top:auto;display:flex;flex-direction:column;gap:16px}
  .drawer__close{position:absolute;top:20px;right:20px}

  /* ---------- 排版 ---------- */
  .h1{font-size:clamp(34px,5.2vw,68px);font-weight:800;line-height:1.08;letter-spacing:-.02em}
  .h2{font-size:clamp(26px,3.2vw,40px);font-weight:800;line-height:1.15;letter-spacing:-.01em}
  .h3{font-size:20px;font-weight:700;line-height:1.35;margin:0}
  .lead{font-size:17px;line-height:1.8;color:var(--ink-500)}
  .eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.08em;color:var(--ink-500)}
  .eyebrow::before{content:"";width:18px;height:1px;background:var(--ink-300)}
  .muted{color:var(--ink-500)}
  .small{font-size:13px;line-height:1.7;color:var(--ink-500)}
  .accent-dot{display:inline-block;width:8px;height:8px;border-radius:2px;background:var(--accent)}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 26px;border-radius:var(--r-pill);
    font-size:15px;font-weight:700;border:1px solid transparent;
    transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),filter .18s var(--ease);
  }
  .btn--primary{background:var(--accent);color:var(--accent-ink)}
  .btn--primary:hover{filter:brightness(.94);transform:translateY(-1px)}
  .btn--ghost{border-color:var(--ink-900);color:var(--ink-900)}
  .btn--ghost:hover{background:var(--ink-900);color:var(--paper-0)}
  .btn--dark{background:var(--ink-900);color:var(--paper-0)}
  .btn--dark:hover{background:#1b211b;transform:translateY(-1px)}
  .btn:active{transform:scale(.98)}
  .btn--link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:700;color:var(--ink-900)}
  .btn--link svg{transition:transform .18s var(--ease)}
  .btn--link:hover svg{transform:translateX(4px)}
  .btn--link:hover{border-bottom:1px solid var(--accent)}

  /* ---------- 区块 ---------- */
  .section{padding:88px 0}
  @media (min-width:1024px){ .section{padding:128px 0} }
  .section--paper2{background:var(--paper-2)}
  .section--dark{background:var(--ink-900);color:var(--paper-0)}
  .sec-head{display:flex;flex-wrap:wrap;gap:18px;align-items:flex-end;justify-content:space-between;margin-bottom:44px}
  .sec-head__note{font-size:15px;color:var(--ink-500);max-width:420px}

  /* ---------- 卡片 ---------- */
  .card{
    background:var(--paper-1);border:1px solid var(--line);border-radius:var(--r-card);
    padding:26px;transition:transform .18s var(--ease),box-shadow .18s var(--ease);
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift)}
  .card__num{
    width:34px;height:34px;border-radius:8px;background:var(--accent);color:var(--accent-ink);
    display:grid;place-items:center;font-size:13px;font-weight:800;letter-spacing:.02em;
  }
  .card__title{font-size:18px;font-weight:700;margin:16px 0 10px;line-height:1.4}
  .card__text{font-size:15px;line-height:1.8;color:var(--ink-500)}
  .card__arrow{margin-top:20px;color:var(--ink-900);transition:transform .18s var(--ease)}
  .card:hover .card__arrow{transform:translateX(4px)}

  .badge{display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:var(--r-badge);font-size:12px;letter-spacing:.06em;white-space:nowrap}
  .badge--cat{background:rgba(226,84,43,.14);color:var(--signal)}
  .badge--time{background:var(--ink-900);color:var(--paper-0)}
  .badge--tag{background:var(--paper-2);color:var(--ink-500)}

  /* ---------- Hero ---------- */
  .hero{padding:132px 0 72px}
  @media (min-width:1024px){ .hero{padding:172px 0 104px} }
  .hero__grid{display:grid;gap:44px}
  @media (min-width:1024px){ .hero__grid{grid-template-columns:6.5fr 5.5fr;gap:56px;align-items:center} }
  .hero__title{margin:18px 0 20px}
  .hero__sub{font-size:18px;line-height:1.8;color:var(--ink-500);max-width:560px}
  .hero__cta{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:32px}
  .hero__stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px;padding-top:28px;border-top:1px solid var(--line)}
  .stat__num{font-size:clamp(26px,3.2vw,36px);font-weight:800;line-height:1.1;letter-spacing:-.02em}
  .stat__label{font-size:13px;color:var(--ink-500);margin-top:6px;line-height:1.6}
  .hero__media{position:relative}
  .hero__frame{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);background:var(--paper-2);aspect-ratio:4/5}
  .hero__frame img{width:100%;height:100%;object-fit:cover}
  @media (max-width:767px){ .hero__frame{aspect-ratio:16/10;max-height:320px} }
  .hero__block{position:absolute;top:-22px;left:-22px;width:120px;height:120px;background:var(--accent);border-radius:16px;z-index:-1}
  @media (max-width:767px){ .hero__block{width:72px;height:72px;top:-12px;left:-12px} }
  .hero__float{
    position:absolute;right:-10px;bottom:-20px;display:flex;gap:12px;align-items:center;
    background:var(--paper-1);border:1px solid var(--line);border-radius:var(--r-img);
    padding:12px;max-width:270px;box-shadow:var(--shadow-lift);
  }
  .hero__float img{width:56px;height:56px;border-radius:12px;object-fit:cover;background:var(--paper-2)}
  .hero__float p{font-size:13px;line-height:1.6;color:var(--ink-500)}

  /* ---------- 痛点 ---------- */
  .pain{display:grid;gap:40px}
  @media (min-width:1024px){ .pain{grid-template-columns:7fr 5fr;gap:56px;align-items:start} }
  .pain__list li{
    display:flex;gap:20px;padding:26px 0;border-bottom:1px solid var(--line);
  }
  .pain__list li:first-child{border-top:1px solid var(--line)}
  .pain__idx{font-size:13px;font-weight:800;color:var(--ink-300);letter-spacing:.08em;padding-top:4px}
  .pain__title{font-size:18px;font-weight:700;margin-bottom:8px}
  .pain__text{font-size:15px;line-height:1.8;color:var(--ink-500)}
  .sticky-card{
    position:sticky;top:112px;background:var(--paper-1);border:1px solid var(--line);
    border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow-card);
  }
  .sticky-card img{width:100%;border-radius:var(--r-img);aspect-ratio:4/3;object-fit:cover;background:var(--paper-2)}
  .sticky-card blockquote{margin:20px 0 0;font-size:15px;line-height:1.8;color:var(--ink-700)}
  .sticky-card blockquote::before{content:"“";display:block;font-size:42px;line-height:.9;color:var(--signal);font-weight:800}

  /* ---------- 方案 ---------- */
  .solve{display:grid;gap:40px}
  @media (min-width:1024px){ .solve{grid-template-columns:4.5fr 7.5fr;gap:56px;align-items:start} }
  .solve__cards{display:grid;gap:24px}
  @media (min-width:768px){ .solve__cards{grid-template-columns:repeat(2,1fr)} .solve__col--offset{margin-top:32px} }
  .solve-card{border-left:1px solid var(--line);border-radius:var(--r-card);padding:26px 26px 26px 28px;background:var(--paper-1);border-top:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease)}
  .solve-card:hover{border-left:3px solid var(--accent);transform:translateY(-4px);box-shadow:var(--shadow-lift)}

  /* ---------- 成果 ---------- */
  .metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}
  @media (min-width:1024px){ .metrics{grid-template-columns:repeat(4,1fr);gap:24px} }
  .metric__num{font-size:clamp(36px,5vw,56px);font-weight:800;line-height:1.05;color:var(--accent);letter-spacing:-.02em}
  .metric__label{font-size:13px;line-height:1.7;color:rgba(246,243,236,.7);margin-top:10px}
  .flow{display:grid;gap:24px;margin-top:64px}
  @media (min-width:768px){ .flow{grid-template-columns:repeat(4,1fr)} }
  .flow__item{position:relative;padding-top:26px;border-top:1px solid rgba(246,243,236,.2)}
  .flow__item::before{content:"";position:absolute;top:-5px;left:0;width:9px;height:9px;border-radius:50%;background:var(--accent)}
  .flow__step{font-size:12px;letter-spacing:.08em;color:rgba(246,243,236,.55)}
  .flow__title{font-size:16px;font-weight:700;margin:8px 0 6px}
  .flow__text{font-size:13px;line-height:1.7;color:rgba(246,243,236,.65)}

  /* ---------- 证言 ---------- */
  .quotes{display:grid;gap:24px;max-width:1100px;margin:0 auto}
  @media (min-width:1024px){ .quotes{grid-template-columns:1fr 1fr;align-items:start} .quotes__col--right{margin-top:40px} }
  .quotes__col{display:grid;gap:24px}
  .quote{background:var(--paper-1);border:1px solid var(--line);border-radius:var(--r-card);padding:26px}
  .quote__mark{font-size:46px;line-height:.8;font-weight:800;color:var(--signal);font-family:Georgia,serif}
  .quote__text{font-size:16px;line-height:1.8;color:var(--ink-700);margin-top:14px}
  .quote__media{margin-top:18px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);background:var(--paper-2)}
  .quote__media img{width:100%;aspect-ratio:16/10;object-fit:cover}
  .quote__meta{margin-top:20px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;line-height:1.8;color:var(--ink-500)}

  /* ---------- 最新信息 ---------- */
  .post-grid{display:grid;gap:24px;grid-template-columns:1fr}
  @media (min-width:640px){ .post-grid{grid-template-columns:repeat(2,1fr)} }
  @media (min-width:1024px){ .post-grid{grid-template-columns:repeat(3,1fr)} }
  .post-card{background:var(--paper-1);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:transform .18s var(--ease),box-shadow .18s var(--ease)}
  .post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift)}
  .post-card__link{display:flex;flex-direction:column;height:100%}
  .post-card__cover{aspect-ratio:16/10;background:var(--paper-2)}
  .post-card__cover img{width:100%;height:100%;object-fit:cover}
  .post-card__body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
  .post-card__title{font-size:17px;font-weight:700;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .post-card__excerpt{font-size:15px;line-height:1.8;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
  .post-card__meta{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-500)}
  .post-card__meta .dot{width:4px;height:4px;border-radius:50%;background:var(--ink-300)}
  .empty-state{
    background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-card);
    padding:56px 24px;display:flex;flex-direction:column;align-items:center;text-align:center;gap:14px;
  }
  .empty-state__icon{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--ink-300);color:var(--ink-500)}
  .empty-state__actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:center;margin-top:6px}

  /* ---------- FAQ ---------- */
  .faq{max-width:860px;margin:0 auto}
  .faq__item{border-top:1px solid var(--line)}
  .faq__item:last-child{border-bottom:1px solid var(--line)}
  .faq__q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 0;font-size:17px;font-weight:700;text-align:left}
  .faq__icon{flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .2s var(--ease)}
  .faq__icon::before,.faq__icon::after{content:"";position:absolute;background:var(--ink-900);border-radius:2px}
  .faq__icon::before{top:10px;left:0;width:22px;height:2px}
  .faq__icon::after{left:10px;top:0;width:2px;height:22px}
  .faq__item.is-open .faq__icon{transform:rotate(45deg)}
  .faq__a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .26s var(--ease)}
  .faq__item.is-open .faq__a{grid-template-rows:1fr}
  .faq__a>div{overflow:hidden}
  .faq__a p{font-size:15px;line-height:1.8;color:var(--ink-500);padding-bottom:24px;max-width:720px}

  /* ---------- CTA ---------- */
  .cta-band{background:var(--accent);border-radius:0}
  .cta-band__inner{display:grid;gap:28px;align-items:center}
  @media (min-width:1024px){ .cta-band__inner{grid-template-columns:1fr auto;gap:56px} }
  .cta-band h2{color:var(--accent-ink)}
  .cta-band p{font-size:16px;line-height:1.8;color:rgba(12,15,12,.72);margin-top:12px;max-width:520px}

  /* ---------- 页脚 ---------- */
  .footer{background:var(--ink-900);color:var(--paper-0);padding:72px 0 32px}
  .footer__grid{display:grid;gap:36px}
  @media (min-width:768px){ .footer__grid{grid-template-columns:repeat(2,1fr)} }
  @media (min-width:1024px){ .footer__grid{grid-template-columns:1.5fr 1fr 1fr 1.1fr} }
  .footer__title{font-size:14px;font-weight:700;letter-spacing:.06em;margin-bottom:18px;color:var(--paper-0)}
  .footer__list li{margin-bottom:12px;font-size:14px}
  .footer a{color:rgba(246,243,236,.62);transition:color .18s var(--ease)}
  .footer a:hover{color:var(--accent)}
  .footer__brand{padding-right:24px}
  .footer__brand .brand__main{font-size:20px;color:var(--paper-0)}
  .footer__brand .brand__sub{color:rgba(246,243,236,.6)}
  .footer__desc{font-size:14px;line-height:1.8;color:rgba(246,243,236,.62);margin-top:16px;max-width:300px}
  .subscribe{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}
  .subscribe input{flex:1 1 180px;height:48px;border-radius:12px;border:1px solid rgba(246,243,236,.18);background:rgba(246,243,236,.06);color:var(--paper-0);padding:0 16px;font-size:14px}
  .subscribe input::placeholder{color:rgba(246,243,236,.4)}
  .subscribe input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(203,255,60,.22)}
  .subscribe .btn{height:48px;padding:0 22px}
  .form-note{font-size:13px;color:rgba(246,243,236,.6);margin-top:10px}
  .form-note.is-error{color:#F0A38C}
  .form-note.is-ok{color:var(--accent)}
  .footer__socials{display:flex;gap:12px;margin-top:22px}
  .footer__socials a{width:38px;height:38px;border-radius:50%;border:1px solid rgba(246,243,236,.18);display:grid;place-items:center;color:rgba(246,243,236,.7)}
  .footer__socials a:hover{border-color:var(--accent);color:var(--accent)}
  .footer__bottom{
    border-top:1px solid rgba(246,243,236,.12);margin-top:52px;padding-top:24px;
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
    font-size:13px;color:rgba(246,243,236,.55);
  }

  /* ---------- 动效 ---------- */
  .reveal{opacity:0;transform:translateY(16px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
  .reveal.in-view{opacity:1;transform:none}
  @media (prefers-reduced-motion: reduce){
    *{animation:none!important;transition:none!important}
    html{scroll-behavior:auto}
    .reveal{opacity:1;transform:none}
  }

/* roulang page: category1 */
:root{
    --ink-900:#0C0F0C;
    --ink-700:#2A2F2A;
    --ink-500:#5E665E;
    --ink-300:#A8AFA6;
    --paper-0:#F6F3EC;
    --paper-1:#FFFFFF;
    --paper-2:#EAE5DA;
    --line:#DDD8CB;
    --accent:#CBFF3C;
    --accent-ink:#0C0F0C;
    --signal:#E2542B;
    --font-cn:'HarmonyOS Sans SC','OPPO Sans','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
    --font-num:'Space Grotesk','Inter','DIN Alternate',sans-serif;
    --r-pill:999px;
    --r-card:20px;
    --r-img:16px;
    --r-sm:12px;
    --ease:cubic-bezier(.22,.61,.36,1);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--paper-0);
    color:var(--ink-700);
    font-family:var(--font-cn);
    font-size:16px;
    line-height:1.8;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  input{font:inherit}
  table{border-collapse:collapse}
  :focus-visible{outline:2px solid var(--ink-900);outline-offset:2px}
  .sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

  .container-x{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
  @media (min-width:1024px){.container-x{padding:0 32px}}

  /* 滚动进度 */
  #scrollProgress{
    position:fixed;top:0;left:0;height:2px;width:0;
    background:var(--accent);z-index:90;transition:width .12s linear;
  }

  /* 浮动 Dock 导航 */
  .dock{
    position:fixed;top:16px;left:0;right:0;margin:0 auto;
    width:calc(100% - 32px);max-width:1080px;height:64px;
    display:flex;align-items:center;gap:12px;
    padding:0 12px 0 20px;
    border-radius:var(--r-pill);
    background:rgba(246,243,236,.82);
    -webkit-backdrop-filter:blur(14px) saturate(1.1);
    backdrop-filter:blur(14px) saturate(1.1);
    border:1px solid var(--line);
    box-shadow:0 12px 32px -20px rgba(12,15,12,.35);
    z-index:70;
    transition:height .2s var(--ease),top .2s var(--ease),background .2s var(--ease);
  }
  .dock.is-scrolled{height:56px;top:8px;background:rgba(246,243,236,.95)}
  .brand{display:inline-flex;align-items:baseline;gap:6px;font-weight:800;color:var(--ink-900);white-space:nowrap}
  .brand__main{font-size:17px;letter-spacing:-.01em}
  .brand__sub{font-size:11px;letter-spacing:.1em;font-weight:600;color:var(--ink-500)}
  .dock__links{display:none;align-items:center;gap:2px;margin-left:10px;flex:1}
  .dock__link{
    position:relative;padding:8px 12px;font-size:15px;color:var(--ink-700);
    border-radius:var(--r-pill);transition:color .18s var(--ease),background .18s var(--ease);
  }
  .dock__link:hover{color:var(--ink-900);background:var(--paper-2)}
  .dock__link.is-active{color:var(--ink-900);font-weight:700}
  .dock__link.is-active::after{
    content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
    background:var(--accent);border-radius:2px;
  }
  .dock__actions{margin-left:auto;display:flex;align-items:center;gap:8px}
  .dock__search{width:0;overflow:hidden;transition:width .24s var(--ease)}
  .dock__search.is-open{width:240px}
  .dock__search input{
    width:240px;height:40px;border-radius:var(--r-pill);border:1px solid var(--line);
    background:var(--paper-1);padding:0 16px;font-size:14px;color:var(--ink-900);
  }
  .dock__search input::placeholder{color:var(--ink-300)}
  .dock__search input:focus{outline:none;border-color:var(--ink-900);box-shadow:0 0 0 4px rgba(203,255,60,.35)}
  .icon-btn{
    width:40px;height:40px;flex:0 0 40px;border-radius:var(--r-pill);
    border:1px solid var(--line);background:var(--paper-1);
    display:inline-flex;align-items:center;justify-content:center;color:var(--ink-700);
    transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  }
  .icon-btn:hover{background:var(--paper-2);color:var(--ink-900);border-color:var(--ink-300)}
  .dock__burger{display:inline-flex}
  .dock__cta{display:none}
  @media (min-width:640px){.dock__cta{display:inline-flex}}
  @media (min-width:1024px){
    .dock__links{display:flex}
    .dock__burger{display:none}
  }

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 22px;border-radius:var(--r-pill);
    font-size:15px;font-weight:700;white-space:nowrap;
    transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
  }
  .btn--primary{background:var(--accent);color:var(--accent-ink);border:1px solid var(--accent)}
  .btn--primary:hover{background:#c2f52f;transform:translateY(-1px)}
  .btn--ghost{background:transparent;color:var(--ink-900);border:1px solid var(--ink-900)}
  .btn--ghost:hover{background:var(--ink-900);color:var(--paper-0)}
  .btn--ghost-light{background:rgba(12,15,12,.22);color:var(--paper-0);border:1px solid rgba(246,243,236,.6)}
  .btn--ghost-light:hover{background:var(--paper-0);color:var(--ink-900);border-color:var(--paper-0)}
  .btn--dark{background:var(--ink-900);color:var(--accent);border:1px solid var(--ink-900)}
  .btn--dark:hover{background:#171d17;transform:translateY(-1px)}
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:700;
    color:var(--ink-900);padding-bottom:2px;
    border-bottom:1px solid transparent;
    transition:border-color .18s var(--ease),color .18s var(--ease);
  }
  .link-arrow svg{transition:transform .18s var(--ease)}
  .link-arrow:hover{border-bottom-color:var(--accent)}
  .link-arrow:hover svg{transform:translateX(4px)}

  /* 眉标 */
  .eyebrow{
    font-size:12px;letter-spacing:.08em;font-weight:700;color:var(--ink-500);
    text-transform:uppercase;margin-bottom:14px;
  }
  .eyebrow--light{color:rgba(246,243,236,.72)}

  /* Hero */
  .cat-hero{position:relative;overflow:hidden;min-height:380px;display:flex;align-items:flex-end;padding:120px 0 40px}
  @media (min-width:768px){.cat-hero{min-height:460px;padding:150px 0 48px}}
  .cat-hero__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
  .cat-hero__overlay{
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(12,15,12,.42) 0%,rgba(12,15,12,.68) 60%,rgba(12,15,12,.82) 100%);
  }
  .cat-hero__inner{position:relative;z-index:2;color:var(--paper-0);width:100%}
  .cat-hero h1{
    font-size:clamp(32px,4.6vw,56px);font-weight:800;line-height:1.1;letter-spacing:-.02em;color:#fff;
  }
  .cat-hero h1 .h1-sub{
    display:block;font-size:13px;font-weight:600;letter-spacing:.14em;
    color:var(--accent);margin-top:12px;
  }
  .cat-hero__sub{
    margin-top:18px;max-width:620px;font-size:17px;line-height:1.8;color:rgba(246,243,236,.82);
  }
  .cat-hero__cta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:28px}
  .cat-hero__stats{
    position:relative;z-index:2;margin-top:34px;display:flex;flex-wrap:wrap;gap:26px;
    padding-top:20px;border-top:1px solid rgba(246,243,236,.18);
  }
  .cat-hero__stat b{
    display:block;font-family:var(--font-num);font-size:24px;font-weight:700;
    color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.2;
  }
  .cat-hero__stat span{font-size:12px;letter-spacing:.06em;color:rgba(246,243,236,.66)}

  /* 面包屑 */
  .crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);margin-bottom:22px}
  .crumbs a:hover{color:var(--ink-900)}
  .crumbs__sep{color:var(--ink-300)}
  .crumbs--light{color:rgba(246,243,236,.66)}
  .crumbs--light a:hover{color:#fff}
  .crumbs--light .crumbs__sep{color:rgba(246,243,236,.4)}
  .crumbs--light .is-current{color:#fff;font-weight:600}

  /* 子标签横条 */
  .subtabs{
    position:sticky;top:88px;z-index:60;
    background:rgba(246,243,236,.82);
    -webkit-backdrop-filter:blur(12px) saturate(1.05);
    backdrop-filter:blur(12px) saturate(1.05);
    border-bottom:1px solid var(--line);
  }
  .subtabs__inner{display:flex;gap:10px;overflow-x:auto;padding:12px 20px;scrollbar-width:none}
  .subtabs__inner::-webkit-scrollbar{display:none}
  @media (min-width:1024px){.subtabs__inner{padding:12px 32px}}
  .chip{
    flex:0 0 auto;display:inline-flex;align-items:center;
    padding:8px 16px;border-radius:var(--r-pill);border:1px solid var(--line);
    background:var(--paper-1);font-size:14px;color:var(--ink-500);
    transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
  }
  .chip:hover{color:var(--ink-900);border-color:var(--ink-300)}
  .chip.is-current{border-color:var(--accent);color:var(--ink-900);font-weight:700;background:rgba(203,255,60,.16)}

  /* 板块 */
  .section{padding:60px 0}
  @media (min-width:1024px){.section{padding:96px 0}}
  .section--paper{background:var(--paper-2)}
  .section--white{background:var(--paper-1)}
  .section-head{max-width:720px;margin-bottom:36px}
  .section-head h2{font-size:clamp(26px,3.2vw,40px);font-weight:800;line-height:1.15;letter-spacing:-.015em;color:var(--ink-900)}
  .section-head p{margin-top:16px;font-size:16px;color:var(--ink-500)}

  /* 错位双栏 */
  .split{display:grid;gap:28px;align-items:center}
  .split + .split{margin-top:48px}
  .split__media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);background:var(--paper-2)}
  .split__media img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
  .split__body h2{font-size:clamp(24px,2.6vw,32px);font-weight:800;line-height:1.2;color:var(--ink-900);margin-bottom:16px}
  .split__body p{font-size:16px;line-height:1.85;color:var(--ink-500);margin-bottom:20px}
  @media (min-width:1024px){
    .split{grid-template-columns:6fr 5.5fr;gap:56px}
    .split--reverse{grid-template-columns:5.5fr 6fr}
    .split--reverse .split__media{order:2}
  }

  /* 编号清单 */
  .numbered{margin-top:8px;border-top:1px solid var(--line)}
  .numbered__item{
    display:flex;align-items:flex-start;gap:18px;
    padding:24px 0;border-bottom:1px solid var(--line);
    transition:transform .18s var(--ease);
  }
  .numbered__idx{
    flex:0 0 40px;height:40px;border-radius:8px;background:var(--accent);color:var(--accent-ink);
    display:inline-flex;align-items:center;justify-content:center;
    font-family:var(--font-num);font-weight:700;font-size:15px;font-variant-numeric:tabular-nums;
  }
  .numbered__body{flex:1;min-width:0}
  .numbered__body h3{font-size:19px;font-weight:700;color:var(--ink-900);margin-bottom:8px}
  .numbered__body p{font-size:15px;line-height:1.8;color:var(--ink-500)}
  .numbered__arrow{flex:0 0 20px;color:var(--ink-300);margin-top:8px;transition:transform .18s var(--ease),color .18s var(--ease)}
  .numbered__item:hover .numbered__arrow{transform:translateX(4px);color:var(--ink-900)}
  .numbered__item:hover{transform:translateX(2px)}

  /* 规格数据带 */
  .specband{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .specband__grid{display:grid;gap:28px;padding:44px 0}
  @media (min-width:640px){.specband__grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.specband__grid{grid-template-columns:repeat(4,1fr);padding:56px 0}}
  .specband__item b{
    display:block;font-family:var(--font-num);font-size:clamp(28px,3.4vw,40px);
    font-weight:700;color:var(--ink-900);font-variant-numeric:tabular-nums;line-height:1.15;
  }
  .specband__item span{display:block;margin-top:8px;font-size:13px;color:var(--ink-500)}

  /* 场景卡 */
  .scene-grid{display:grid;gap:24px}
  @media (min-width:768px){.scene-grid{grid-template-columns:1fr 1fr}}
  @media (min-width:1024px){.scene-grid{grid-template-columns:1.15fr .9fr 1fr}}
  .card{
    background:var(--paper-1);border:1px solid var(--line);border-radius:var(--r-card);
    padding:26px;display:flex;flex-direction:column;gap:14px;
    transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
  }
  .card:hover{transform:translateY(-4px);box-shadow:0 18px 40px -20px rgba(12,15,12,.28)}
  .card__tag{
    align-self:flex-start;padding:5px 12px;border-radius:var(--r-pill);
    background:rgba(226,84,43,.16);color:var(--signal);
    font-size:12px;letter-spacing:.06em;font-weight:700;
  }
  .card h3{font-size:20px;font-weight:700;color:var(--ink-900);line-height:1.35}
  .card p{font-size:15px;line-height:1.8;color:var(--ink-500)}
  .card__figure{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);background:var(--paper-2)}
  .card__figure img{width:100%;aspect-ratio:16/10;object-fit:cover}

  /* FAQ */
  .faq{max-width:860px;margin:0 auto;border-top:1px solid var(--line)}
  .faq__item{border-bottom:1px solid var(--line)}
  .faq__q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
    padding:22px 0;text-align:left;font-size:17px;font-weight:700;color:var(--ink-900);
    transition:color .18s var(--ease);
  }
  .faq__q:hover{color:var(--ink-700)}
  .faq__icon{position:relative;flex:0 0 16px;width:16px;height:16px;transition:transform .2s var(--ease)}
  .faq__icon::before,.faq__icon::after{content:"";position:absolute;background:var(--ink-900);border-radius:2px}
  .faq__icon::before{left:0;top:7px;width:16px;height:2px}
  .faq__icon::after{left:7px;top:0;width:2px;height:16px}
  .faq__q[aria-expanded="true"] .faq__icon{transform:rotate(45deg)}
  .faq__a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .26s var(--ease)}
  .faq__item.is-open .faq__a{grid-template-rows:1fr}
  .faq__a-inner{overflow:hidden}
  .faq__a p{padding:0 40px 22px 0;font-size:15px;line-height:1.85;color:var(--ink-500)}

  /* CTA 带 */
  .cta-band{background:var(--ink-900);color:var(--paper-0)}
  .cta-band__inner{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
    gap:24px;padding:56px 0;
  }
  .cta-band h2{font-size:clamp(24px,3vw,36px);font-weight:800;line-height:1.2;color:#fff;max-width:620px}
  .cta-band p{margin-top:12px;font-size:15px;color:rgba(246,243,236,.7)}
  .cta-band__side{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
  .cta-band__side small{font-size:13px;color:rgba(246,243,236,.6)}

  /* 页脚 */
  .footer{background:var(--ink-900);color:var(--paper-0);padding:64px 0 28px;margin-top:0}
  .footer__grid{display:grid;gap:32px}
  @media (min-width:768px){.footer__grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.footer__grid{grid-template-columns:1.7fr 1fr 1fr 1.2fr}}
  .footer .brand{color:var(--paper-0)}
  .footer .brand__sub{color:rgba(246,243,236,.6)}
  .footer__desc{margin-top:14px;font-size:15px;color:rgba(246,243,236,.66);max-width:320px}
  .footer__title{font-size:13px;letter-spacing:.08em;font-weight:700;color:rgba(246,243,236,.6);margin-bottom:16px}
  .footer__list li{margin-bottom:10px}
  .footer__list a{font-size:15px;color:rgba(246,243,236,.86);transition:color .18s var(--ease)}
  .footer__list a:hover{color:var(--accent)}
  .footer__contact li{font-size:15px;color:rgba(246,243,236,.86);margin-bottom:10px}
  .footer__contact span{display:block;font-size:13px;color:rgba(246,243,236,.55)}
  .subscribe{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
  .subscribe input{
    flex:1 1 180px;min-width:0;height:48px;border-radius:var(--r-sm);
    border:1px solid rgba(246,243,236,.18);background:rgba(246,243,236,.06);
    color:var(--paper-0);padding:0 14px;font-size:14px;
  }
  .subscribe input::placeholder{color:rgba(246,243,236,.5)}
  .subscribe input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(203,255,60,.35)}
  .form-note{margin-top:10px;font-size:13px;color:rgba(246,243,236,.55)}
  .form-note.is-error{color:#ff9b7a}
  .footer__socials{display:flex;gap:10px;margin-top:20px}
  .footer__socials a{
    width:38px;height:38px;border-radius:var(--r-pill);border:1px solid rgba(246,243,236,.18);
    display:inline-flex;align-items:center;justify-content:center;color:rgba(246,243,236,.8);
    transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  }
  .footer__socials a:hover{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
  .footer__bottom{
    margin-top:44px;padding-top:20px;border-top:1px solid rgba(246,243,236,.12);
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
    font-size:13px;color:rgba(246,243,236,.55);
  }

  /* 移动抽屉 */
  .drawer{
    position:fixed;inset:0;background:var(--paper-0);z-index:85;
    transform:translateX(100%);transition:transform .28s var(--ease);
    display:flex;flex-direction:column;padding:24px 20px;
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
  .drawer__links a{
    display:block;padding:18px 0;font-size:22px;font-weight:700;color:var(--ink-900);
    border-bottom:1px solid var(--line);
  }
  .drawer__links a.is-active{color:var(--ink-900)}
  .drawer__links a.is-active::before{
    content:"";display:inline-block;width:4px;height:4px;border-radius:50%;
    background:var(--accent);margin-right:10px;vertical-align:middle;
  }
  .drawer__foot{margin-top:auto;display:flex;flex-direction:column;gap:16px}
  .drawer__foot p{font-size:14px;color:var(--ink-500)}

  /* 入场动效 */
  .reveal{opacity:0;transform:translateY(16px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
  .reveal.in-view{opacity:1;transform:none}

  @media (max-width:1023px){
    .btn:hover,.card:hover,.numbered__item:hover{transform:none}
    .btn:active{transform:scale(.98)}
  }

  @media (prefers-reduced-motion: reduce){
    *{transition:none !important;animation:none !important}
    html{scroll-behavior:auto}
    .reveal{opacity:1;transform:none}
  }

/* roulang page: article */
:root{
    --ink-900:#0C0F0C;
    --ink-700:#2A2F2A;
    --ink-500:#5E665E;
    --ink-300:#A8AFA6;
    --paper-0:#F6F3EC;
    --paper-1:#FFFFFF;
    --paper-2:#EAE5DA;
    --line:#DDD8CB;
    --accent:#CBFF3C;
    --accent-ink:#0C0F0C;
    --signal:#E2542B;
    --r-card:20px;
    --r-img:16px;
    --r-pill:999px;
    --shadow-1:0 1px 2px rgba(12,15,12,.04);
    --shadow-2:0 18px 40px -20px rgba(12,15,12,.28);
    --ease:cubic-bezier(.22,.61,.36,1);
    --font-sans:'HarmonyOS Sans SC','OPPO Sans','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
    --font-num:'Space Grotesk','Inter','DIN Alternate',sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{
    margin:0;
    padding-top:88px;
    background:var(--paper-0);
    color:var(--ink-700);
    font-family:var(--font-sans);
    font-size:17px;
    line-height:1.8;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none}
  img{display:block;max-width:100%;height:auto}
  button{font:inherit;cursor:pointer}
  ul,ol{margin:0;padding:0}
  :focus-visible{outline:2px solid var(--ink-900);outline-offset:2px}
  ::selection{background:var(--accent);color:var(--accent-ink)}

  .container-x{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
  @media (min-width:1024px){.container-x{padding:0 32px}}

  .num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

  .progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:90;transition:width .1s linear}

  /* ============ Dock 导航 ============ */
  .dock{
    position:fixed;top:16px;left:0;right:0;margin:0 auto;
    width:calc(100% - 32px);max-width:1080px;height:64px;
    display:flex;align-items:center;gap:18px;
    padding:0 12px 0 20px;
    border-radius:var(--r-pill);
    background:rgba(246,243,236,.82);
    -webkit-backdrop-filter:blur(14px) saturate(1.1);
    backdrop-filter:blur(14px) saturate(1.1);
    border:1px solid var(--line);
    box-shadow:0 12px 32px -20px rgba(12,15,12,.35);
    z-index:80;
    transition:height .2s var(--ease),top .2s var(--ease),box-shadow .2s var(--ease);
  }
  .dock.is-scrolled{top:8px;height:56px;box-shadow:0 14px 30px -22px rgba(12,15,12,.45)}

  .brand{display:flex;flex-direction:column;line-height:1.05;color:var(--ink-900);flex:0 0 auto}
  .brand__main{font-weight:800;font-size:17px;letter-spacing:-.01em}
  .brand__sub{font-size:11px;letter-spacing:.1em;color:var(--ink-500);margin-top:3px}

  .dock__links{display:flex;align-items:center;gap:22px;margin-left:8px}
  .dock__link{position:relative;font-size:15px;color:var(--ink-700);padding:6px 2px;transition:color .18s var(--ease)}
  .dock__link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;background:transparent;transition:background .18s var(--ease)}
  .dock__link.is-active{color:var(--ink-900);font-weight:700}
  .dock__link.is-active::after{background:var(--accent)}
  @media (min-width:900px){
    .dock__link:hover{color:var(--ink-900)}
    .dock__link:hover::after{background:var(--accent)}
  }

  .dock__actions{margin-left:auto;display:flex;align-items:center;gap:10px}

  .dock__search{width:0;overflow:hidden;transition:width .25s var(--ease)}
  .dock__search.is-open{width:220px}
  .dock__search input{
    width:100%;height:40px;border-radius:var(--r-pill);
    border:1px solid var(--line);background:var(--paper-1);
    padding:0 16px;font-size:14px;color:var(--ink-900);
    transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
  }
  .dock__search input::placeholder{color:var(--ink-300)}
  .dock__search input:focus{outline:none;border-color:var(--ink-900);box-shadow:0 0 0 4px rgba(203,255,60,.35)}

  .icon-btn{
    width:40px;height:40px;flex:0 0 auto;border-radius:var(--r-pill);
    border:1px solid var(--line);background:var(--paper-1);
    display:grid;place-items:center;color:var(--ink-700);
    transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
  }
  .icon-btn:hover{color:var(--ink-900);border-color:var(--ink-300)}
  .icon-btn:active{transform:scale(.96)}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:40px;padding:0 20px;border-radius:var(--r-pill);
    font-size:14px;font-weight:700;border:1px solid transparent;
    transition:transform .18s var(--ease),filter .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  }
  .btn--primary{background:var(--accent);color:var(--accent-ink)}
  .btn--ghost{border-color:var(--ink-900);color:var(--ink-900);background:transparent}
  .btn--dark{background:var(--ink-900);color:var(--accent);height:48px;padding:0 26px;font-size:15px}
  .btn--lg{height:48px;padding:0 26px;font-size:15px}
  @media (min-width:900px){
    .btn--primary:hover{filter:brightness(.94);transform:translateY(-1px)}
    .btn--ghost:hover{background:var(--ink-900);color:var(--paper-0)}
    .btn--dark:hover{filter:brightness(1.15);transform:translateY(-1px)}
  }
  .btn:active{transform:scale(.98)}

  .link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:700;color:var(--ink-900);border-bottom:1px solid transparent;transition:border-color .18s var(--ease)}
  .link-arrow span{transition:transform .18s var(--ease);color:var(--signal)}
  @media (min-width:900px){
    .link-arrow:hover{border-color:var(--accent)}
    .link-arrow:hover span{transform:translateX(4px)}
  }

  /* ============ 面包屑 / 文章头 ============ */
  .crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);margin-bottom:26px}
  .crumbs a{color:var(--ink-500)}
  .crumbs a:hover{color:var(--ink-900)}
  .crumbs__sep{color:var(--ink-300)}
  .crumbs__current{color:var(--ink-900);font-weight:600;max-width:min(60vw,420px);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

  .post-hero{padding:38px 0 10px}
  .post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--ink-500)}
  .badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);font-size:12px;letter-spacing:.06em}
  .badge--cat{background:rgba(226,84,43,.14);color:var(--signal);font-weight:700}
  .post-meta__dot{color:var(--ink-300)}

  .post-title{
    margin:18px 0 0;
    font-size:clamp(30px,4.2vw,52px);
    line-height:1.18;font-weight:800;letter-spacing:-.02em;color:var(--ink-900);
    max-width:900px;
  }
  .post-lead{
    margin:22px 0 0;max-width:780px;
    border-left:3px solid var(--accent);padding-left:16px;
    font-size:16px;line-height:1.8;color:var(--ink-500);
  }
  .post-cover{margin:34px 0 0}
  .post-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-card);border:1px solid var(--line);background:var(--paper-2)}
  .figcap{margin-top:10px;font-size:13px;color:var(--ink-300)}

  /* ============ 文章布局 ============ */
  .section{padding:56px 0}
  .article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:48px}
  @media (min-width:1024px){.article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:56px}}

  .toc-bar{display:flex;gap:10px;overflow-x:auto;padding:0 0 16px;margin-bottom:8px;scrollbar-width:none}
  .toc-bar::-webkit-scrollbar{display:none}
  .toc-bar a{
    flex:0 0 auto;height:34px;display:inline-flex;align-items:center;padding:0 16px;
    border-radius:var(--r-pill);border:1px solid var(--line);background:var(--paper-1);
    font-size:13px;color:var(--ink-500);white-space:nowrap;
  }
  .toc-bar a.is-current{border-color:var(--accent);color:var(--ink-900);font-weight:700;background:rgba(203,255,60,.22)}
  @media (min-width:1024px){.toc-bar{display:none}}

  .article-body{max-width:740px;font-size:17px;line-height:1.85;color:var(--ink-700)}
  .article-body > *:first-child{margin-top:0}
  .article-body p{margin:0 0 1.2em}
  .article-body h2{
    position:relative;margin:2.2em 0 .8em;padding-left:20px;
    font-size:24px;line-height:1.4;font-weight:800;color:var(--ink-900);
    scroll-margin-top:120px;
  }
  .article-body h2::before{content:"";position:absolute;left:0;top:.5em;width:8px;height:8px;border-radius:2px;background:var(--accent)}
  .article-body h3{margin:1.8em 0 .6em;font-size:19px;font-weight:700;color:var(--ink-900);scroll-margin-top:120px}
  .article-body h4{margin:1.5em 0 .5em;font-size:17px;font-weight:700;color:var(--ink-900)}
  .article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:1.4em}
  .article-body li{margin:.45em 0}
  .article-body ul{list-style:square}
  .article-body ul li::marker{color:var(--accent)}
  .article-body ol{list-style:decimal}
  .article-body ol li::marker{color:var(--signal);font-family:var(--font-num);font-weight:700}
  .article-body blockquote{
    margin:1.7em 0;padding:20px 22px;border-radius:14px;
    background:var(--paper-2);border-left:3px solid var(--signal);
    font-size:16px;color:var(--ink-700);
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body img{border-radius:14px;margin:1.7em auto;border:1px solid var(--line);background:var(--paper-2)}
  .article-body figure{margin:1.7em 0}
  .article-body figcaption{margin-top:10px;font-size:13px;color:var(--ink-300);text-align:center}
  .article-body a{color:var(--ink-900);font-weight:600;box-shadow:inset 0 -1px 0 var(--accent);transition:box-shadow .18s var(--ease),color .18s var(--ease)}
  .article-body a:hover{color:var(--signal);box-shadow:inset 0 -1px 0 var(--signal)}
  .article-body code{
    background:var(--paper-2);border-radius:4px;padding:2px 6px;
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;color:var(--ink-900);
  }
  .article-body pre{
    margin:1.7em 0;padding:18px 20px;border-radius:14px;overflow-x:auto;
    background:var(--ink-900);color:var(--paper-0);border:1px solid var(--ink-900);
  }
  .article-body pre code{background:transparent;color:inherit;padding:0;font-size:13px}
  .article-body table{width:100%;border-collapse:collapse;margin:1.7em 0;font-size:15px}
  .article-body thead th{background:var(--paper-2);color:var(--ink-900);font-weight:700;text-align:left}
  .article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;vertical-align:top}
  .article-body tbody tr:nth-child(even){background:rgba(234,229,218,.5)}
  .article-body hr{border:none;border-top:1px solid var(--line);margin:2.4em 0}

  /* ============ 侧栏 ============ */
  .sidebar{display:none}
  @media (min-width:1024px){.sidebar{display:block}}
  .side-sticky{position:sticky;top:96px;display:grid;gap:24px}
  .side-card{background:var(--paper-1);border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--shadow-1)}
  .side-card__title{display:flex;align-items:center;gap:8px;margin:0 0 14px;font-size:13px;letter-spacing:.08em;font-weight:800;color:var(--ink-900)}
  .side-card__title::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--accent)}
  .toc{list-style:none;display:grid;gap:2px;max-height:320px;overflow:auto}
  .toc a{display:block;position:relative;padding:8px 0 8px 14px;font-size:14px;line-height:1.55;color:var(--ink-500);transition:color .18s var(--ease)}
  .toc a::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:3px;background:transparent;transition:background .18s var(--ease)}
  .toc a:hover{color:var(--ink-900)}
  .toc a.is-current{color:var(--ink-900);font-weight:700}
  .toc a.is-current::before{background:var(--accent)}

  .mini-list{list-style:none;display:grid;gap:14px}
  .mini-list a{display:flex;gap:12px;align-items:center;font-size:14px;line-height:1.5;color:var(--ink-700)}
  .mini-list a:hover{color:var(--ink-900)}
  .mini-list img{width:56px;height:56px;flex:0 0 auto;border-radius:12px;object-fit:cover;border:1px solid var(--line);background:var(--paper-2)}
  .mini-list small{display:block;margin-top:4px;font-size:12px;color:var(--ink-300)}

  /* ============ 文章尾 ============ */
  .post-foot{margin-top:44px;padding-top:26px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between;align-items:center}
  .post-tags{display:flex;flex-wrap:wrap;gap:10px}
  .tag{display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);background:var(--paper-2);color:var(--ink-500);font-size:13px}
  .share{display:flex;align-items:center;gap:10px}
  .share__btn{
    width:38px;height:38px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--paper-1);
    display:grid;place-items:center;color:var(--ink-700);
    transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
  }
  .share__btn:hover{color:var(--ink-900);border-color:var(--ink-300)}
  .share__btn:active{transform:scale(.96)}
  .share__copy{
    height:38px;padding:0 16px;border-radius:var(--r-pill);border:1px solid var(--ink-900);
    background:transparent;color:var(--ink-900);font-size:13px;font-weight:700;
    transition:background .18s var(--ease),color .18s var(--ease);
  }
  .share__copy:hover{background:var(--ink-900);color:var(--paper-0)}

  .nextprev{display:grid;gap:16px;margin:36px 0 26px}
  @media (min-width:768px){.nextprev{grid-template-columns:1fr 1fr}}
  .entry-card{
    display:flex;flex-direction:column;gap:8px;
    padding:24px;border:1px solid var(--line);border-radius:var(--r-card);
    background:var(--paper-1);box-shadow:var(--shadow-1);
    transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
  }
  @media (min-width:900px){
    .entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--ink-300)}
  }
  .entry-card__label{font-size:12px;letter-spacing:.08em;color:var(--ink-500)}
  .entry-card__title{font-size:17px;font-weight:700;color:var(--ink-900)}
  .entry-card__desc{font-size:14px;line-height:1.7;color:var(--ink-500)}
  .entry-card__go{font-size:13px;font-weight:700;color:var(--signal)}

  .empty{
    background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-card);
    padding:56px 24px;text-align:center;
  }
  .empty svg{color:var(--ink-500);margin:0 auto 16px}
  .empty__title{margin:0;font-size:20px;font-weight:800;color:var(--ink-900)}
  .empty__desc{margin:10px auto 22px;max-width:420px;font-size:15px;color:var(--ink-500)}
  .back-list{margin:6px 0 0}

  /* ============ CTA 带 ============ */
  .cta-band{background:var(--accent);padding:56px 0;margin-top:24px}
  .cta-band__inner{display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between}
  .cta-band h2{margin:0;font-size:clamp(24px,3vw,34px);line-height:1.25;font-weight:800;color:var(--accent-ink);max-width:620px}
  .cta-band p{margin:10px 0 0;font-size:15px;color:rgba(12,15,12,.72)}
  .cta-band__side{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
  .cta-band__note{font-size:13px;color:rgba(12,15,12,.7)}

  /* ============ 页脚 ============ */
  .footer{background:var(--ink-900);color:var(--paper-0);padding:64px 0 32px}
  .footer__grid{display:grid;grid-template-columns:1fr;gap:36px}
  @media (min-width:640px){.footer__grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.footer__grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}}
  .footer .brand__main{color:var(--paper-0)}
  .footer .brand__sub{color:rgba(246,243,236,.6)}
  .footer__desc{margin:14px 0 18px;max-width:300px;font-size:14px;line-height:1.75;color:rgba(246,243,236,.66)}
  .footer__title{margin:0 0 16px;font-size:14px;font-weight:700;letter-spacing:.06em;color:var(--paper-0)}
  .footer__list{list-style:none;display:grid;gap:10px;font-size:14px}
  .footer__list a{color:rgba(246,243,236,.66);transition:color .18s var(--ease)}
  .footer__list a:hover{color:var(--accent)}
  .footer__list--plain{color:rgba(246,243,236,.6)}
  .subscribe{display:flex;gap:8px;flex-wrap:wrap;margin-top:4px}
  .subscribe input{
    flex:1 1 170px;height:48px;border-radius:12px;
    border:1px solid rgba(246,243,236,.18);background:rgba(246,243,236,.06);
    color:var(--paper-0);padding:0 14px;font-size:14px;
    transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
  }
  .subscribe input::placeholder{color:rgba(246,243,236,.42)}
  .subscribe input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(203,255,60,.25)}
  .form-note{margin:10px 0 0;font-size:12px;color:rgba(246,243,236,.5)}
  .footer__socials{display:flex;gap:10px;margin-top:20px}
  .footer__socials a{
    width:38px;height:38px;border-radius:var(--r-pill);
    border:1px solid rgba(246,243,236,.18);display:grid;place-items:center;
    color:rgba(246,243,236,.7);transition:color .18s var(--ease),border-color .18s var(--ease);
  }
  .footer__socials a:hover{color:var(--accent);border-color:var(--accent)}
  .footer__bottom{
    margin-top:44px;padding-top:20px;border-top:1px solid rgba(246,243,236,.12);
    display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;
    font-size:13px;color:rgba(246,243,236,.5);
  }

  /* ============ 移动抽屉 ============ */
  .drawer{
    position:fixed;inset:0;z-index:95;background:var(--paper-0);
    padding:22px 20px 28px;display:flex;flex-direction:column;gap:8px;
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:opacity .22s var(--ease),transform .22s var(--ease);
  }
  .drawer.is-open{opacity:1;transform:none;pointer-events:auto}
  .drawer__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
  .drawer__links{display:grid}
  .drawer__links a{
    font-size:22px;font-weight:700;color:var(--ink-900);
    padding:18px 0;border-bottom:1px solid var(--line);
  }
  .drawer__links a.is-active{color:var(--signal)}
  .drawer__foot{margin-top:auto;display:grid;gap:14px}
  .drawer__foot p{margin:0;font-size:13px;color:var(--ink-500)}

  @media (max-width:899px){
    .dock__links{display:none}
    .dock__search{display:none}
    .dock__cta{display:none}
  }
  @media (min-width:900px){
    .dock__burger{display:none}
    .drawer{display:none}
  }

  /* ============ 入场动效 ============ */
  .reveal{opacity:0;transform:translateY(16px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
  .reveal.in-view{opacity:1;transform:none}

  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    *,*::before,*::after{animation:none !important;transition:none !important}
    .reveal{opacity:1;transform:none}
  }

/* roulang page: category2 */
:root{
    --ink-900:#0C0F0C;
    --ink-700:#2A2F2A;
    --ink-500:#5E665E;
    --ink-300:#A8AFA6;
    --paper-0:#F6F3EC;
    --paper-1:#FFFFFF;
    --paper-2:#EAE5DA;
    --line:#DDD8CB;
    --accent:#CBFF3C;
    --accent-ink:#0C0F0C;
    --signal:#E2542B;
    --font-sans:'HarmonyOS Sans SC','OPPO Sans','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
    --font-num:'Space Grotesk','Inter','DIN Alternate',sans-serif;
    --radius-pill:999px;
    --radius-card:20px;
    --radius-media:16px;
    --radius-badge:12px;
    --shadow-base:0 0 0 1px var(--line),0 1px 2px rgba(12,15,12,.04);
    --shadow-lift:0 18px 40px -20px rgba(12,15,12,.28);
    --ease:cubic-bezier(.22,.61,.36,1);
    --space-section:88px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--paper-0);
    color:var(--ink-700);
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.8;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  body.no-scroll{overflow:hidden}
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  input{font:inherit}
  h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
  ul,ol{padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--ink-900);outline-offset:2px;border-radius:6px}

  .container-x{width:100%;max-width:1240px;margin-inline:auto;padding-inline:20px}
  @media (min-width:1024px){.container-x{padding-inline:32px}}

  .num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

  /* ---------- 滚动进度 ---------- */
  .scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:120;transition:width .1s linear}

  /* ---------- Dock 导航 ---------- */
  .dock{
    position:fixed;top:16px;left:0;right:0;margin-inline:auto;
    width:calc(100% - 32px);max-width:1080px;height:64px;
    display:flex;align-items:center;justify-content:space-between;gap:14px;
    padding:0 12px 0 20px;border-radius:var(--radius-pill);
    background:rgba(246,243,236,.82);
    -webkit-backdrop-filter:blur(14px) saturate(1.1);
    backdrop-filter:blur(14px) saturate(1.1);
    border:1px solid var(--line);
    box-shadow:0 12px 32px -20px rgba(12,15,12,.35);
    z-index:100;
    transition:top .2s var(--ease),height .2s var(--ease),background .2s var(--ease);
  }
  .dock.is-compact{top:8px;height:56px;background:rgba(246,243,236,.94)}

  .brand{display:flex;flex-direction:column;gap:2px;line-height:1}
  .brand__main{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink-900)}
  .brand__sub{font-size:11px;letter-spacing:.1em;color:var(--ink-500)}

  .dock__links{display:none;align-items:center;gap:26px}
  @media (min-width:1024px){.dock__links{display:flex}}
  .dock__link{position:relative;padding:6px 2px;font-size:16px;color:var(--ink-700);transition:color .18s var(--ease)}
  .dock__link:hover{color:var(--ink-900)}
  .dock__link.is-active{color:var(--ink-900);font-weight:700}
  .dock__link.is-active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;background:var(--accent);transform:translateY(6px)}

  .dock__actions{display:flex;align-items:center;gap:8px}
  .icon-btn{
    width:40px;height:40px;border-radius:var(--radius-pill);
    border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;
    color:var(--ink-900);background:transparent;
    transition:background-color .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
  }
  .icon-btn:hover{background:var(--paper-2)}
  .icon-btn:active{transform:scale(.98)}
  .dock__burger{display:inline-flex}
  @media (min-width:1024px){.dock__burger{display:none}}

  .dock__search{width:0;overflow:hidden;transition:width .24s var(--ease)}
  .dock__search.is-open{width:216px}
  .dock__search input{
    width:100%;height:40px;padding:0 16px;border-radius:var(--radius-pill);
    border:1px solid var(--line);background:var(--paper-1);color:var(--ink-900);font-size:14px;
    outline:none;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
  }
  .dock__search input:focus{border-color:var(--ink-900);box-shadow:0 0 0 4px rgba(203,255,60,.35)}

  .dock__cta{display:none}
  @media (min-width:640px){.dock__cta{display:inline-flex;height:40px;padding:0 20px}}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 22px;border-radius:var(--radius-pill);
    font-size:15px;font-weight:700;white-space:nowrap;
    transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
  }
  .btn:active{transform:scale(.98)}
  .btn--primary{background:var(--accent);color:var(--accent-ink)}
  .btn--primary:hover{background:#c2f52f;transform:translateY(-1px)}
  .btn--dark{background:var(--ink-900);color:var(--accent)}
  .btn--dark:hover{transform:translateY(-1px);box-shadow:0 14px 30px -16px rgba(12,15,12,.5)}
  .btn--ghost{border:1px solid var(--ink-900);color:var(--ink-900)}
  .btn--ghost:hover{background:var(--ink-900);color:var(--paper-0)}
  .btn--light-ghost{border:1px solid rgba(246,243,236,.5);color:var(--paper-0)}
  .btn--light-ghost:hover{background:var(--paper-0);color:var(--ink-900)}

  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:700;color:var(--ink-900);
    padding:4px 0;border-bottom:1px solid transparent;
    transition:border-color .18s var(--ease),color .18s var(--ease);
  }
  .link-arrow svg{transition:transform .18s var(--ease)}
  .link-arrow:hover{border-bottom-color:var(--accent)}
  .link-arrow:hover svg{transform:translateX(4px)}

  /* ---------- 标签 / 徽章 ---------- */
  .badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--radius-pill);font-size:12px;letter-spacing:.06em}
  .badge--signal{background:rgba(226,84,43,.14);color:var(--signal)}
  .badge--ink{background:var(--ink-900);color:var(--paper-0)}
  .badge--soft{background:var(--paper-2);color:var(--ink-500)}

  .eyebrow{font-size:12px;letter-spacing:.08em;color:var(--ink-500);text-transform:uppercase}
  .eyebrow--light{color:var(--accent)}

  /* ---------- 面包屑 ---------- */
  .crumb{display:flex;align-items:center;gap:8px;font-size:13px}
  .crumb__sep{color:var(--ink-300)}
  .crumb--light{color:rgba(246,243,236,.72)}
  .crumb--light .crumb__sep{color:rgba(246,243,236,.4)}
  .crumb--light [aria-current="page"]{color:#F6F3EC}

  /* ---------- Hero ---------- */
  .cat-hero{position:relative;overflow:hidden;background:var(--ink-900);display:flex;align-items:flex-end;padding:132px 0 52px;min-height:420px}
  .cat-hero__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
  .cat-hero__overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(12,15,12,.74) 0%,rgba(12,15,12,.52) 55%,rgba(12,15,12,.7) 100%)}
  .cat-hero__inner{position:relative;z-index:2;color:var(--paper-0)}
  .cat-hero__title{margin:14px 0 0;font-size:clamp(32px,4.6vw,56px);font-weight:800;line-height:1.08;letter-spacing:-.02em;color:#F6F3EC}
  .cat-hero__title-sub{display:block;margin-top:10px;font-size:clamp(14px,1.5vw,19px);font-weight:600;letter-spacing:.02em;color:rgba(246,243,236,.76)}
  .cat-hero__lead{max-width:640px;margin-top:16px;font-size:18px;line-height:1.75;color:rgba(246,243,236,.86)}
  .cat-hero__foot{display:flex;flex-wrap:wrap;gap:24px;align-items:flex-end;justify-content:space-between;margin-top:32px}
  .cat-hero__meter{font-size:13px;letter-spacing:.04em;color:rgba(246,243,236,.72);display:flex;gap:18px;flex-wrap:wrap}
  .cat-hero__meter b{font-family:var(--font-num);font-size:18px;font-weight:700;color:var(--accent);margin-right:6px}
  @media (max-width:639px){
    .cat-hero{min-height:320px;padding:112px 0 40px}
    .cat-hero__lead{font-size:16px}
  }

  /* ---------- 子标签横条 ---------- */
  .subtabs{
    position:sticky;top:76px;z-index:70;
    background:rgba(246,243,236,.82);
    -webkit-backdrop-filter:blur(14px) saturate(1.1);
    backdrop-filter:blur(14px) saturate(1.1);
    border-bottom:1px solid var(--line);
  }
  @media (min-width:1024px){.subtabs{top:88px}}
  .subtabs__row{display:flex;gap:10px;overflow-x:auto;padding:12px 0;scrollbar-width:none}
  .subtabs__row::-webkit-scrollbar{display:none}
  .chip{
    flex:0 0 auto;display:inline-flex;align-items:center;height:36px;padding:0 16px;
    border-radius:var(--radius-pill);border:1px solid var(--line);
    background:var(--paper-1);color:var(--ink-500);font-size:14px;
    transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
  }
  .chip:hover{color:var(--ink-900);border-color:var(--ink-300)}
  .chip.is-active{border-color:var(--accent);color:var(--ink-900);font-weight:700;background:rgba(203,255,60,.2)}

  /* ---------- 板块骨架 ---------- */
  .section{padding-block:var(--space-section)}
  .section--white{background:var(--paper-1)}
  .section--paper2{background:var(--paper-2)}
  @media (min-width:1024px){.section{padding-block:128px}}

  .sec-head{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;justify-content:space-between;margin-bottom:40px}
  .sec-title{margin-top:8px;font-size:clamp(26px,3.2vw,40px);font-weight:800;line-height:1.15;letter-spacing:-.01em;color:var(--ink-900)}
  .sec-note{max-width:430px;font-size:15px;color:var(--ink-500)}

  /* ---------- 横向卡片带 ---------- */
  .hcards{
    display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
    padding:6px 20px 18px;margin-inline:-20px;scrollbar-width:none;
  }
  .hcards::-webkit-scrollbar{display:none}
  @media (min-width:1024px){.hcards{padding-inline:0;margin-inline:0}}
  .hcards__item{flex:0 0 78%;scroll-snap-align:start}
  @media (min-width:640px){.hcards__item{flex:0 0 52%}}
  @media (min-width:768px){.hcards__item{flex:0 0 calc((100% - 20px)/2)}}
  @media (min-width:1024px){.hcards__item{flex:0 0 calc((100% - 40px)/3)}}

  .mcard{
    background:var(--paper-1);border:1px solid var(--line);border-radius:var(--radius-card);
    padding:16px;box-shadow:0 1px 2px rgba(12,15,12,.04);height:100%;
    transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
  }
  @media (min-width:1024px){
    .mcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift)}
  }
  .mcard__media{aspect-ratio:4/5;border-radius:var(--radius-media);overflow:hidden;background:var(--paper-2);border:1px solid var(--line)}
  .mcard__media img{width:100%;height:100%;object-fit:cover}
  .mcard__body{padding:18px 6px 6px}
  .mcard__title{margin-top:12px;font-size:20px;font-weight:700;color:var(--ink-900)}
  .mcard__text{margin-top:8px;font-size:15px;line-height:1.8;color:var(--ink-500)}

  /* ---------- 三步流程 ---------- */
  .steps{display:grid;gap:26px;position:relative}
  @media (min-width:768px){.steps{grid-template-columns:repeat(3,1fr);gap:24px}}
  .step{position:relative;padding-top:30px;border-top:1px solid var(--line)}
  .step__dot{
    position:absolute;top:-7px;left:0;width:14px;height:14px;border-radius:50%;
    background:var(--accent);box-shadow:0 0 0 4px var(--paper-1);
  }
  .step__idx{font-family:var(--font-num);font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--ink-500)}
  .step__title{margin-top:8px;font-size:20px;font-weight:700;color:var(--ink-900)}
  .step__text{margin-top:8px;font-size:15px;color:var(--ink-500)}
  .steps__line{display:none}
  @media (min-width:768px){
    .steps__line{display:block;position:absolute;top:0;left:0;right:0;height:1px;background:var(--line)}
  }

  /* ---------- 规格数据带 ---------- */
  .spec{display:grid;gap:28px}
  @media (min-width:640px){.spec{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.spec{grid-template-columns:repeat(4,1fr);gap:24px}}
  .spec__item{padding-top:22px;border-top:1px solid rgba(12,15,12,.12)}
  .spec__num{display:flex;align-items:center;font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:clamp(34px,4.6vw,52px);font-weight:800;line-height:1;color:var(--ink-900)}
  .spec__num::before{content:"";width:12px;height:12px;margin-right:12px;border-radius:3px;background:var(--accent)}
  .spec__label{margin-top:12px;font-size:14px;color:var(--ink-500)}

  /* ---------- 场景图文 ---------- */
  .scene{display:grid;gap:24px;align-items:center}
  @media (min-width:768px){.scene{grid-template-columns:1fr 1fr;gap:48px}}
  .scene + .scene{margin-top:56px}
  @media (min-width:1024px){.scene + .scene{margin-top:80px}}
  .scene--rev .scene__media{order:-1}
  @media (min-width:768px){.scene--rev .scene__media{order:2}}
  .scene__media{border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);background:var(--paper-2);aspect-ratio:16/11}
  .scene__media img{width:100%;height:100%;object-fit:cover}
  .scene__title{font-size:22px;font-weight:700;color:var(--ink-900)}
  .scene__text{margin-top:12px;font-size:16px;line-height:1.8;color:var(--ink-700)}
  .scene__list{margin-top:16px;display:grid;gap:10px}
  .scene__list li{position:relative;padding-left:20px;font-size:15px;color:var(--ink-500)}
  .scene__list li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--accent)}

  /* ---------- FAQ ---------- */
  .faq{max-width:860px;margin-inline:auto}
  .faq__item{border-top:1px solid var(--line)}
  .faq__item:last-child{border-bottom:1px solid var(--line)}
  .faq__q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:22px 0;text-align:left;font-size:17px;font-weight:700;color:var(--ink-900);
  }
  .faq__icon{position:relative;flex:0 0 auto;width:22px;height:22px}
  .faq__icon::before,.faq__icon::after{content:"";position:absolute;background:var(--ink-900);border-radius:2px;transition:transform .2s var(--ease)}
  .faq__icon::before{left:2px;right:2px;top:10px;height:2px}
  .faq__icon::after{top:2px;bottom:2px;left:10px;width:2px}
  .faq__item.is-open .faq__icon::after{transform:rotate(90deg) scaleY(0)}
  .faq__a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .26s var(--ease)}
  .faq__item.is-open .faq__a{grid-template-rows:1fr}
  .faq__a > div{overflow:hidden}
  .faq__a p{max-width:720px;margin:0 0 24px;font-size:15px;line-height:1.85;color:var(--ink-500)}

  /* ---------- CTA 带 ---------- */
  .cta-band{background:var(--accent);color:var(--accent-ink);padding:56px 0}
  @media (min-width:1024px){.cta-band{padding:72px 0}}
  .cta-band__inner{display:grid;gap:26px;align-items:center}
  @media (min-width:768px){.cta-band__inner{grid-template-columns:1.5fr .9fr}}
  .cta-band__title{font-size:clamp(24px,3vw,36px);font-weight:800;line-height:1.2;letter-spacing:-.01em}
  .cta-band__text{margin-top:10px;font-size:16px;max-width:520px;color:rgba(12,15,12,.78)}
  .cta-band__actions{display:flex;flex-direction:column;align-items:flex-start;gap:12px}
  .cta-band__hint{font-size:13px;color:rgba(12,15,12,.66)}

  /* ---------- 页脚 ---------- */
  .footer{background:var(--ink-900);color:var(--paper-0);padding:72px 0 28px}
  .footer .brand__main{color:var(--paper-0)}
  .footer .brand__sub{color:rgba(246,243,236,.6)}
  .footer__grid{display:grid;gap:36px}
  @media (min-width:768px){.footer__grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}}
  .footer__desc{margin-top:16px;max-width:300px;font-size:15px;color:rgba(246,243,236,.72)}
  .footer__title{margin-bottom:16px;font-size:14px;font-weight:700;letter-spacing:.06em;color:var(--paper-0)}
  .footer__list{display:grid;gap:12px;font-size:15px;color:rgba(246,243,236,.6)}
  .footer__list a{transition:color .18s var(--ease)}
  .footer__list a:hover{color:var(--paper-0)}
  .footer__text{font-size:15px;color:rgba(246,243,236,.6)}
  .footer__socials{display:flex;gap:10px;margin-top:20px}
  .footer__socials a{
    width:38px;height:38px;border-radius:var(--radius-pill);
    border:1px solid rgba(246,243,236,.18);display:inline-flex;align-items:center;justify-content:center;
    color:rgba(246,243,236,.8);transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
  }
  .footer__socials a:hover{border-color:var(--accent);color:var(--accent);background:rgba(203,255,60,.08)}
  .footer__bottom{
    margin-top:48px;padding-top:20px;border-top:1px solid rgba(246,243,236,.12);
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
    font-size:13px;color:rgba(246,243,236,.6);
  }

  .subscribe{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
  .subscribe input{
    flex:1 1 200px;min-width:0;height:48px;padding:0 14px;border-radius:var(--radius-badge);
    border:1px solid rgba(246,243,236,.2);background:rgba(246,243,236,.06);color:var(--paper-0);font-size:15px;
    outline:none;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
  }
  .subscribe input::placeholder{color:rgba(246,243,236,.45)}
  .subscribe input:focus{border-color:var(--accent);box-shadow:0 0 0 4px rgba(203,255,60,.35)}
  .subscribe .btn{height:48px}
  .form-note{margin-top:10px;font-size:13px;color:rgba(246,243,236,.6)}

  /* ---------- 抽屉 ---------- */
  .drawer{
    position:fixed;inset:0;z-index:110;background:var(--paper-0);
    display:flex;flex-direction:column;padding:22px 20px 32px;overflow-y:auto;
    transform:translateY(-100%);visibility:hidden;
    transition:transform .28s var(--ease),visibility .28s var(--ease);
  }
  .drawer.is-open{transform:translateY(0);visibility:visible}
  .drawer__top{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid var(--line)}
  .drawer__links{display:grid;margin-top:12px}
  .drawer__links a{padding:20px 0;border-bottom:1px solid var(--line);font-size:22px;font-weight:700;color:var(--ink-900)}
  .drawer__links a.is-active{color:var(--ink-900)}
  .drawer__links a.is-active::before{content:"";display:inline-block;width:8px;height:8px;margin-right:10px;border-radius:2px;background:var(--accent);vertical-align:middle}
  .drawer__foot{margin-top:auto;padding-top:28px;display:grid;gap:14px}
  .drawer__meta{font-size:13px;color:var(--ink-500)}

  /* ---------- 动效 ---------- */
  .reveal{opacity:0;transform:translateY(16px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
  .reveal.in-view{opacity:1;transform:none}

  @media (prefers-reduced-motion: reduce){
    *,*::before,*::after{animation:none !important;transition:none !important}
    html{scroll-behavior:auto}
    .reveal{opacity:1;transform:none}
  }