/* roulang page: index */
:root{
    --ink-900:#07090C; --ink-800:#0C1015; --ink-700:#12171E;
    --surface-1:#161C24; --surface-2:#1D242D;
    --line:#262E38; --line-strong:#333D49;
    --text-hi:#F2F5F8; --text-mid:#A9B4C0; --text-lo:#6C7885;
    --neon-1:#35E0D0; --neon-2:#FF3D81; --neon-3:#FFB454;
    --r-sm:8px; --r-md:14px; --r-lg:20px; --r-pill:999px;
    --ease:cubic-bezier(.22,.61,.36,1);
    --font-sans:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
    --font-mono:"JetBrains Mono","SF Mono",Consolas,monospace;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{
    margin:0;background:var(--ink-800);color:var(--text-mid);
    font-family:var(--font-sans);font-size:16px;line-height:1.85;letter-spacing:0;
    -webkit-font-smoothing:antialiased;overflow-x:hidden;
  }
  img{max-width:100%;display:block;border-style:none}
  a{color:inherit;text-decoration:none}
  button,input,select,textarea{font:inherit;color:inherit}
  h1,h2,h3,h4,p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--neon-1);outline-offset:2px;border-radius:4px}
  ::selection{background:rgba(53,224,208,.3);color:#fff}
  .mono{font-family:var(--font-mono);font-size:.92em;letter-spacing:.02em}

  .container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
  @media (max-width:1024px){.container{padding:0 24px}}
  @media (max-width:640px){.container{padding:0 20px}}

  .skip-link{position:absolute;left:-9999px;top:0;background:var(--neon-1);color:#07090C;padding:10px 16px;z-index:200;border-radius:0 0 8px 0}
  .skip-link:focus{left:0}

  /* ---------- 顶栏 ---------- */
  .site-header{position:sticky;top:0;z-index:90;background:rgba(12,16,21,.9);
    border-bottom:1px solid transparent;transition:background .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease)}
  .site-header.is-scrolled{background:rgba(7,9,12,.96);border-bottom-color:rgba(53,224,208,.45);
    box-shadow:0 14px 34px -26px rgba(53,224,208,.75)}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px}
  .brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
  .brand-mark{display:inline-flex;width:28px;height:28px;align-items:center;justify-content:center;
    border-radius:9px;background:rgba(53,224,208,.08);box-shadow:0 0 0 1px rgba(53,224,208,.35)}
  .brand-text{font-size:17px;font-weight:800;color:var(--text-hi);letter-spacing:-.01em;white-space:nowrap}
  .nav-desktop{display:none}
  @media (min-width:1024px){.nav-desktop{display:flex;align-items:center;gap:28px;margin-left:12px}}
  .nav-link{position:relative;font-size:15px;color:var(--text-mid);line-height:68px;transition:color .18s var(--ease)}
  .nav-link::after{content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;background:var(--neon-1);
    transform:scaleX(0);transform-origin:left;transition:transform .26s var(--ease)}
  .nav-link:hover{color:var(--text-hi)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.is-active{color:var(--text-hi);text-shadow:0 0 14px rgba(53,224,208,.5)}
  .nav-link.is-active::after{transform:scaleX(1);box-shadow:0 0 10px rgba(53,224,208,.75)}
  .nav-actions{display:flex;align-items:center;gap:16px}
  .nav-divider{display:none;width:1px;height:24px;background:var(--line-strong)}
  @media (min-width:1024px){.nav-divider{display:block}}
  .menu-toggle{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;
    padding:0 10px;background:transparent;border:1px solid var(--line);border-radius:10px;cursor:pointer;transition:border-color .2s var(--ease)}
  .menu-toggle span{display:block;height:2px;background:var(--text-hi);border-radius:2px;transition:transform .26s var(--ease),opacity .2s var(--ease)}
  .menu-toggle:hover{border-color:var(--neon-1)}
  .menu-toggle.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-toggle.is-active span:nth-child(2){opacity:0}
  .menu-toggle.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  @media (min-width:1024px){.menu-toggle{display:none}}
  .mobile-drawer{position:fixed;inset:0;z-index:80;background:var(--ink-900);padding:92px 24px 32px;
    transform:translateY(-102%);transition:transform .34s var(--ease);display:flex;flex-direction:column;justify-content:space-between;overflow-y:auto}
  .mobile-drawer.is-open{transform:translateY(0)}
  .drawer-link{display:flex;align-items:center;height:48px;padding-left:12px;border-left:3px solid transparent;
    font-size:16px;color:var(--text-mid);border-bottom:1px solid rgba(38,46,56,.6)}
  .drawer-link.is-active{color:var(--text-hi);border-left-color:var(--neon-1);text-shadow:0 0 12px rgba(53,224,208,.45)}
  .drawer-foot{margin-top:28px}

  /* ---------- 按钮 ---------- */
  .btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;
    border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;overflow:hidden;
    transition:transform .18s var(--ease),background .26s var(--ease),border-color .26s var(--ease),box-shadow .26s var(--ease),filter .26s var(--ease)}
  .btn:active{transform:scale(.985)}
  .btn-primary{background:var(--neon-1);color:#07090C}
  .btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 26px -8px rgba(53,224,208,.7)}
  .btn-primary::after{content:"";position:absolute;top:0;left:-130%;width:55%;height:100%;
    background:linear-gradient(100deg,transparent,rgba(255,255,255,.6),transparent);transform:skewX(-18deg);transition:left .45s var(--ease)}
  .btn-primary:hover::after{left:135%}
  .btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-hi)}
  .btn-ghost:hover{border-color:var(--neon-1);background:rgba(53,224,208,.08)}
  .btn-lg{height:52px;padding:0 28px;font-size:16px}
  .btn-sm{height:40px;padding:0 18px;font-size:14px}
  .btn-block{width:100%}
  .btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--neon-1);font-size:14px;font-weight:600}
  .btn-text .arw{transition:transform .2s var(--ease)}
  .btn-text:hover .arw{transform:translateX(4px)}
  @media (max-width:640px){
    .btn-lg,.hero-actions .btn{width:100%}
    .hero-actions{flex-direction:column;align-items:stretch}
  }

  /* ---------- 徽章 ---------- */
  .badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
    font-size:12px;letter-spacing:.02em;white-space:nowrap}
  .badge-neon{color:var(--neon-1);background:rgba(53,224,208,.12);border:1px solid rgba(53,224,208,.3)}
  .badge-magenta{color:var(--neon-2);background:rgba(255,61,129,.12);border:1px solid rgba(255,61,129,.32)}
  .badge-amber{color:var(--neon-3);background:rgba(255,180,84,.12);border:1px solid rgba(255,180,84,.3)}

  /* ---------- 通用板块 ---------- */
  .section{padding:112px 0}
  @media (max-width:1024px){.section{padding:88px 0}}
  @media (max-width:640px){.section{padding:64px 0}}
  .eyebrow{display:flex;align-items:center;gap:12px;font-size:13px;letter-spacing:.16em;color:var(--neon-1)}
  .eyebrow::after{content:"";width:24px;height:1px;background:var(--neon-1);box-shadow:0 0 8px rgba(53,224,208,.9)}
  .h2{font-size:clamp(1.6rem,2.8vw,2.35rem);line-height:1.18;font-weight:700;color:var(--text-hi);letter-spacing:-.01em}
  .h3{font-size:1.2rem;line-height:1.45;font-weight:600;color:var(--text-hi)}
  .lead{font-size:15px;color:var(--text-mid);max-width:560px}
  .divider{height:1px;background:var(--line);border:0;margin:0}

  /* ---------- Hero ---------- */
  .hero{position:relative;background:var(--ink-800);padding:88px 0 0;overflow:hidden}
  .hero::before{content:"";position:absolute;inset:0;pointer-events:none;
    background-image:linear-gradient(rgba(53,224,208,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(53,224,208,.05) 1px,transparent 1px);
    background-size:48px 48px;animation:gridDrift 12s linear infinite}
  @keyframes gridDrift{to{background-position:48px 48px}}
  .hero-grid{position:relative;display:grid;gap:48px;grid-template-columns:1fr;align-items:center}
  @media (min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:56px}}
  .hero-copy h1{font-size:clamp(2.3rem,5.4vw,4.2rem);line-height:1.08;font-weight:800;letter-spacing:-.02em;color:var(--text-hi);margin:20px 0 0}
  .hero-sub{margin-top:20px;font-size:17px;color:var(--text-mid);max-width:520px}
  .hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
  .hero-note{margin-top:18px;font-size:13px;color:var(--text-lo)}
  .hero-visual{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);min-height:340px}
  .hero-visual img{width:100%;height:100%;min-height:340px;object-fit:cover;animation:breathe 9s ease-in-out infinite}
  @keyframes breathe{0%,100%{transform:scale(1)}50%{transform:scale(1.02)}}
  .hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,9,12,.92),rgba(7,9,12,.25))}
  @media (max-width:1023px){.hero-visual::after{background:linear-gradient(180deg,rgba(7,9,12,.85),rgba(7,9,12,.3))}}
  .hero-float{position:absolute;left:20px;bottom:20px;z-index:2;background:rgba(12,16,21,.94);
    border:1px solid var(--line);border-radius:var(--r-md);padding:14px 18px;display:flex;align-items:center;gap:14px}
  .hero-float .num{font-family:var(--font-mono);font-size:22px;font-weight:700;color:var(--neon-3)}
  .hero-float .cap{font-size:12px;color:var(--text-lo);line-height:1.5}
  .trust-bar{margin-top:64px;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(2,1fr)}
  @media (min-width:768px){.trust-bar{grid-template-columns:repeat(4,1fr)}}
  .trust-item{padding:26px 20px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
  @media (min-width:768px){.trust-item{border-bottom:0}}
  .trust-item:nth-child(2n){border-right:0}
  @media (min-width:768px){.trust-item:nth-child(2n){border-right:1px solid var(--line)}.trust-item:last-child{border-right:0}}
  .trust-num{font-family:var(--font-mono);font-size:clamp(1.6rem,2.4vw,2.05rem);font-weight:700;color:var(--neon-1)}
  .trust-label{margin-top:6px;font-size:13px;color:var(--text-lo)}

  /* ---------- 三步 ---------- */
  .steps-section{background:var(--ink-900);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .steps-grid{position:relative;display:grid;gap:36px;grid-template-columns:1fr;margin-top:56px}
  @media (min-width:1024px){.steps-grid{grid-template-columns:repeat(3,1fr);gap:48px}
    .steps-grid::before{content:"";position:absolute;top:44px;left:6%;right:6%;border-top:1px dashed var(--line-strong);z-index:0}}
  .step{position:relative;padding-left:28px;z-index:1}
  @media (min-width:1024px){.step{padding-left:0}}
  @media (max-width:1023px){
    .step{border-left:1px solid rgba(53,224,208,.35)}
    .step::before{content:"";position:absolute;left:-5px;top:10px;width:9px;height:9px;border-radius:50%;
      background:var(--neon-1);box-shadow:0 0 12px rgba(53,224,208,.85)}
  }
  .step-num{display:block;font-family:var(--font-mono);font-size:88px;line-height:1;font-weight:700;
    color:rgba(53,224,208,.16);-webkit-text-stroke:1px rgba(53,224,208,.55);margin-bottom:16px}
  @media (max-width:640px){.step-num{font-size:64px}}
  .step p{margin-top:12px;font-size:15px;color:var(--text-mid);max-width:340px}
  .step .btn-text{margin-top:16px}

  /* ---------- 案例 ---------- */
  .case-grid{display:grid;gap:24px;grid-template-columns:1fr;margin-top:56px}
  @media (min-width:1024px){.case-grid{grid-template-columns:8fr 4fr;align-items:stretch}}
  .case-main{position:relative;display:block;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);min-height:380px;
    transition:transform .26s var(--ease),border-color .26s var(--ease),box-shadow .26s var(--ease)}
  .case-main img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .26s var(--ease)}
  .case-main::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,9,12,.2),rgba(7,9,12,.92))}
  .case-main:hover{transform:translateY(-4px);border-color:rgba(53,224,208,.45);
    box-shadow:0 18px 44px -22px rgba(0,0,0,.9),0 0 26px -10px rgba(53,224,208,.5)}
  .case-main:hover img{transform:scale(1.04)}
  .case-main-body{position:relative;z-index:2;padding:28px;height:100%;display:flex;flex-direction:column;justify-content:flex-end}
  .case-main-body h3{font-size:1.3rem;font-weight:600;color:var(--text-hi);line-height:1.45;margin-top:14px}
  .case-metrics{display:flex;gap:28px;margin-top:20px}
  .case-metrics .m-num{font-family:var(--font-mono);font-size:1.5rem;font-weight:700;color:var(--neon-3)}
  .case-metrics .m-cap{font-size:12px;color:var(--text-lo)}
  .case-side{display:flex;flex-direction:column;gap:24px}
  .case-mini{display:flex;align-items:center;gap:14px;padding:16px;border:1px solid var(--line);border-radius:var(--r-md);
    background:var(--surface-1);flex:1;transition:transform .26s var(--ease),border-color .26s var(--ease),box-shadow .26s var(--ease)}
  .case-mini:hover{transform:translateY(-4px);border-color:rgba(53,224,208,.45);box-shadow:0 18px 44px -22px rgba(0,0,0,.9),0 0 26px -10px rgba(53,224,208,.5)}
  .case-mini img{width:56px;height:56px;border-radius:var(--r-sm);object-fit:cover;flex:0 0 56px;border:1px solid var(--line)}
  .case-mini h3{font-size:15px;font-weight:600;color:var(--text-hi);line-height:1.5}
  .case-mini .mini-meta{margin-top:6px;font-size:12px;color:var(--text-lo)}
  .case-mini .arw{margin-left:auto;color:var(--neon-1);transition:transform .2s var(--ease)}
  .case-mini:hover .arw{transform:translateX(4px)}
  .data-bar{display:grid;grid-template-columns:1fr 1fr;gap:0;margin-top:40px;border-top:1px solid var(--line)}
  @media (min-width:768px){.data-bar{grid-template-columns:repeat(3,1fr)}}
  .data-item{padding:26px 20px;border-right:1px solid var(--line)}
  .data-item:last-child{border-right:0}
  @media (max-width:767px){.data-item:nth-child(2n){border-right:0}.data-item{border-bottom:1px solid var(--line)}}
  .data-num{font-family:var(--font-mono);font-size:1.6rem;font-weight:700;color:var(--text-hi)}
  .data-cap{margin-top:6px;font-size:12px;color:var(--text-lo)}

  /* ---------- 资讯卡（CMS） ---------- */
  .news-card{display:flex;flex-direction:column;background:var(--surface-1);border:1px solid var(--line);border-radius:var(--r-md);
    overflow:hidden;transition:transform .26s var(--ease),border-color .26s var(--ease),box-shadow .26s var(--ease)}
  .news-card:hover{transform:translateY(-4px);border-color:rgba(53,224,208,.45);
    box-shadow:0 18px 44px -22px rgba(0,0,0,.9),0 0 26px -10px rgba(53,224,208,.5)}
  .news-media{position:relative;aspect-ratio:16/9;background:var(--ink-700);overflow:hidden}
  .news-media img{width:100%;height:100%;object-fit:cover;transition:transform .26s var(--ease)}
  .news-card:hover .news-media img{transform:scale(1.04)}
  .news-media-ph{position:absolute;inset:0;background:
    repeating-linear-gradient(135deg,rgba(53,224,208,.12) 0 1px,transparent 1px 14px),var(--ink-700);
    box-shadow:inset 0 0 0 1px rgba(53,224,208,.3)}
  .news-tag{position:absolute;left:12px;top:12px;display:inline-flex;align-items:center;height:26px;padding:0 10px;
    border-radius:var(--r-pill);font-size:12px;color:var(--neon-1);background:rgba(7,9,12,.78);border:1px solid rgba(53,224,208,.35)}
  .news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
  .news-title{font-size:1.05rem;font-weight:600;color:var(--text-hi);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .news-desc{margin-top:10px;font-size:14px;color:var(--text-mid);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .news-meta{margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:var(--text-lo)}
  .news-more{color:var(--neon-1)}
  .empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;height:240px;
    border:1px dashed var(--line-strong);border-radius:var(--r-md);background:var(--ink-700);text-align:center;padding:0 20px}
  .empty-state p{font-size:15px;color:var(--text-mid)}

  /* ---------- FAQ ---------- */
  .faq-grid{display:grid;gap:40px;grid-template-columns:1fr;margin-top:12px}
  @media (min-width:1024px){.faq-grid{grid-template-columns:4fr 8fr;gap:64px}}
  .faq-aside{position:static}
  @media (min-width:1024px){.faq-aside{position:sticky;top:104px;align-self:start}}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item:first-child{border-top:1px solid var(--line)}
  .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:22px 0;
    background:none;border:0;text-align:left;font-size:17px;font-weight:600;color:var(--text-hi);cursor:pointer;
    transition:color .2s var(--ease)}
  .faq-q:hover{color:var(--neon-1)}
  .faq-item.is-open .faq-q{color:var(--neon-1)}
  .faq-icon{flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .32s var(--ease)}
  .faq-icon::before,.faq-icon::after{content:"";position:absolute;background:currentColor;border-radius:2px}
  .faq-icon::before{left:0;right:0;top:10px;height:2px}
  .faq-icon::after{top:0;bottom:0;left:10px;width:2px}
  .faq-item.is-open .faq-icon{transform:rotate(45deg)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
  .faq-a-inner{padding:0 40px 22px 0;font-size:15px;line-height:1.85;color:var(--text-mid);max-width:680px}

  /* ---------- CTA ---------- */
  .cta-panel{position:relative;border:1px solid rgba(53,224,208,.4);border-radius:var(--r-lg);background:var(--ink-900);
    overflow:hidden;box-shadow:0 0 44px -22px rgba(53,224,208,.55)}
  .cta-panel::before{content:"";position:absolute;inset:0;pointer-events:none;
    background-image:linear-gradient(rgba(53,224,208,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(53,224,208,.06) 1px,transparent 1px);
    background-size:40px 40px}
  .cta-inner{position:relative;display:grid;gap:44px;grid-template-columns:1fr;padding:44px}
  @media (min-width:1024px){.cta-inner{grid-template-columns:6fr 6fr;padding:56px}}
  @media (max-width:640px){.cta-inner{padding:28px 22px}}
  .check-list{margin-top:26px;display:grid;gap:14px}
  .check-item{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-mid)}
  .check-item .dot{flex:0 0 auto;width:18px;height:18px;margin-top:6px;border-radius:50%;
    border:1px solid rgba(53,224,208,.6);position:relative}
  .check-item .dot::after{content:"";position:absolute;left:5px;top:4px;width:6px;height:3px;border-left:2px solid var(--neon-1);
    border-bottom:2px solid var(--neon-1);transform:rotate(-45deg)}
  .apply-form{background:var(--surface-1);border:1px solid var(--line);border-radius:var(--r-md);padding:24px}
  .field{margin-bottom:16px}
  .field label{display:block;font-size:13px;color:var(--text-lo);margin-bottom:8px}
  .field input,.field select{width:100%;height:48px;padding:0 14px;border-radius:10px;background:var(--surface-2);
    border:1px solid var(--line);color:var(--text-hi);transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
  .field input::placeholder{color:var(--text-lo)}
  .field input:focus,.field select:focus{outline:none;border-color:var(--neon-1);box-shadow:0 0 0 3px rgba(53,224,208,.18)}
  .form-hint{margin-top:14px;font-size:12px;line-height:1.7;color:var(--text-lo)}
  .form-hint.is-ok{color:var(--neon-1)}
  .cta-note{margin-top:26px;font-size:12px;color:var(--text-lo)}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:72px 0 28px;margin-top:0}
  .footer-grid{display:grid;gap:40px;grid-template-columns:1fr}
  @media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}}
  .footer-brand p{margin-top:16px;font-size:14px;color:var(--text-lo);max-width:320px}
  .footer-contact{margin-top:18px;font-size:13px;color:var(--text-mid);line-height:2}
  .footer-title{font-size:14px;font-weight:700;color:var(--text-hi);margin-bottom:18px}
  .footer-list li{margin-bottom:12px}
  .footer-list a{font-size:14px;color:var(--text-mid);transition:color .2s var(--ease)}
  .footer-list a:hover{color:var(--neon-1)}
  .footer-tags{margin-top:44px;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:10px 22px}
  .footer-tags a{font-size:13px;color:var(--text-lo);transition:color .2s var(--ease)}
  .footer-tags a:hover{color:var(--neon-1)}
  .footer-bottom{margin-top:24px;display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
    font-size:12px;color:var(--text-lo)}
  .to-top{position:fixed;right:20px;bottom:24px;z-index:70;width:44px;height:44px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;background:rgba(12,16,21,.94);border:1px solid var(--line);
    color:var(--neon-1);cursor:pointer;opacity:0;pointer-events:none;transition:opacity .26s var(--ease),transform .26s var(--ease),border-color .26s var(--ease)}
  .to-top.is-visible{opacity:1;pointer-events:auto}
  .to-top:hover{transform:translateY(-3px);border-color:var(--neon-1)}

  /* ---------- 入场动画 ---------- */
  .reveal{opacity:0;transform:translateY(18px);animation:rise .42s var(--ease) forwards}
  .reveal.d1{animation-delay:.06s}.reveal.d2{animation-delay:.12s}.reveal.d3{animation-delay:.18s}
  @keyframes rise{to{opacity:1;transform:translateY(0)}}

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

/* roulang page: article */
:root{
  --ink-900:#07090C; --ink-800:#0C1015; --ink-700:#12171E;
  --surface-1:#161C24; --surface-2:#1D242D;
  --line:#262E38; --line-strong:#333D49;
  --text-hi:#F2F5F8; --text-mid:#A9B4C0; --text-lo:#6C7885;
  --neon-1:#35E0D0; --neon-2:#FF3D81; --neon-3:#FFB454;
  --r-sm:8px; --r-md:14px; --r-lg:20px; --r-pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SF Mono",Consolas,monospace;
  --shadow-card:0 0 0 1px var(--line);
  --shadow-hover:0 0 0 1px rgba(53,224,208,.45),0 18px 44px -22px rgba(0,0,0,.9),0 0 26px -10px rgba(53,224,208,.5);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--ink-800); color:var(--text-mid);
  font-family:var(--font-sans); font-size:16px; line-height:1.85;
  letter-spacing:0; -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
h1,h2,h3,h4{color:var(--text-hi); margin:0; letter-spacing:-.01em}
p{margin:0}
a{color:inherit; text-decoration:none; transition:color .18s var(--ease)}
img{max-width:100%; display:block}
button,input,textarea,select{font-family:inherit; font-size:inherit; color:inherit}
ul,ol{margin:0; padding:0; list-style:none}
:focus-visible{outline:2px solid var(--neon-1); outline-offset:2px; border-radius:4px}
::selection{background:rgba(53,224,208,.28); color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--ink-900)}
::-webkit-scrollbar-thumb{background:#242C36; border-radius:999px; border:2px solid var(--ink-900)}
::-webkit-scrollbar-thumb:hover{background:#33404E}

.container{width:100%; max-width:1240px; margin:0 auto; padding:0 32px}

/* ---------- header ---------- */
.site-header{
  position:sticky; top:0; z-index:80;
  background:rgba(12,16,21,.94);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease), background .25s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 1px 0 rgba(53,224,208,.45), 0 18px 40px -30px rgba(0,0,0,.95)}
.nav-inner{display:flex; align-items:center; gap:28px; height:68px}
.brand{display:inline-flex; align-items:center; gap:10px; flex:none}
.brand-mark{display:inline-flex; width:28px; height:28px; align-items:center; justify-content:center}
.brand-text{font-size:1.02rem; font-weight:700; color:var(--text-hi); letter-spacing:.01em; white-space:nowrap}
.brand:hover .brand-text{color:var(--neon-1)}
.nav-desktop{display:flex; align-items:center; gap:6px; margin-left:auto}
.nav-link{
  position:relative; padding:22px 12px; font-size:15px; color:var(--text-mid);
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:""; position:absolute; left:12px; right:12px; bottom:14px; height:2px;
  background:var(--neon-1); border-radius:2px; transform:scaleX(0); transform-origin:left;
  transition:transform .28s var(--ease);
}
.nav-link:hover{color:var(--text-hi)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--text-hi); text-shadow:0 0 14px rgba(53,224,208,.55)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex; align-items:center; gap:16px; flex:none}
.nav-divider{width:1px; height:22px; background:var(--line-strong); display:inline-block}
.menu-toggle{
  display:none; width:44px; height:44px; border:1px solid var(--line); background:transparent;
  border-radius:10px; padding:12px 10px; cursor:pointer; flex-direction:column; justify-content:space-between;
}
.menu-toggle span{display:block; height:2px; background:var(--text-hi); border-radius:2px; transition:transform .26s var(--ease), opacity .2s var(--ease)}
.menu-toggle.is-open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  position:relative; display:inline-flex; align-items:center; justify-content:center; gap:8px;
  height:48px; padding:0 24px; border-radius:10px; font-size:15px; font-weight:600;
  border:1px solid transparent; cursor:pointer; overflow:hidden; white-space:nowrap;
  transition:background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .12s var(--ease);
}
.btn::after{
  content:""; position:absolute; top:0; left:-120%; width:60%; height:100%;
  background:linear-gradient(100deg, transparent, rgba(255,255,255,.35), transparent);
  transform:skewX(-18deg); transition:left .45s var(--ease);
}
.btn:hover::after{left:130%}
.btn:active{transform:scale(.985)}
.btn-primary{background:var(--neon-1); color:#06131A; box-shadow:0 0 24px -10px rgba(53,224,208,.8)}
.btn-primary:hover{background:#4aeadd; box-shadow:0 0 30px -8px rgba(53,224,208,.95)}
.btn-ghost{background:transparent; color:var(--text-hi); border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--neon-1); background:rgba(53,224,208,.08); color:var(--neon-1)}
.btn-sm{height:40px; padding:0 18px; font-size:14px}
.btn-lg{height:52px; padding:0 28px}
.btn-block{width:100%}
.link-arrow{display:inline-flex; align-items:center; gap:6px; color:var(--neon-1); font-size:14px; font-weight:600}
.link-arrow svg{transition:transform .22s var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------- badges ---------- */
.badge{
  display:inline-flex; align-items:center; gap:6px; height:26px; padding:0 12px;
  border-radius:var(--r-pill); font-size:12px; letter-spacing:.02em; font-weight:600;
}
.badge-neon{background:rgba(53,224,208,.12); color:var(--neon-1); border:1px solid rgba(53,224,208,.3)}
.badge-magenta{background:rgba(255,61,129,.14); color:var(--neon-2); border:1px solid rgba(255,61,129,.32)}
.badge-amber{background:rgba(255,180,84,.12); color:var(--neon-3); border:1px solid rgba(255,180,84,.3)}

/* ---------- article head ---------- */
.page-head{
  position:relative; overflow:hidden;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover; background-position:center right;
  border-bottom:1px solid var(--line);
}
.page-head::before{
  content:""; position:absolute; inset:0;
  background:linear-gradient(90deg, rgba(7,9,12,.94) 0%, rgba(7,9,12,.86) 42%, rgba(7,9,12,.32) 100%);
}
.page-head .container{position:relative; z-index:2; padding-top:40px; padding-bottom:56px}
.breadcrumb{
  display:flex; align-items:center; gap:8px; flex-wrap:wrap;
  font-size:13px; color:var(--text-lo); letter-spacing:.02em; margin-bottom:26px;
}
.breadcrumb a:hover{color:var(--neon-1)}
.breadcrumb .sep{color:#3A444F}
.breadcrumb .current{max-width:320px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; color:var(--text-mid)}
.eyebrow{display:inline-flex; align-items:center; gap:12px; font-size:13px; letter-spacing:.02em; color:var(--neon-1); margin-bottom:18px}
.eyebrow::before{content:""; width:24px; height:1px; background:var(--neon-1)}
.article-title{
  font-size:clamp(2rem, 3.6vw, 3rem); line-height:1.22; font-weight:800; letter-spacing:-.02em;
  max-width:860px; margin:0 0 22px;
}
.meta-bar{
  display:flex; align-items:center; gap:14px; flex-wrap:wrap;
  font-size:13px; color:var(--text-lo); letter-spacing:.02em;
}
.meta-bar .dot{width:4px; height:4px; border-radius:50%; background:#3A444F}
.meta-bar .mono{font-family:var(--font-mono); color:var(--text-mid)}
.head-actions{display:flex; gap:12px; margin-top:26px; flex-wrap:wrap}

/* ---------- layout ---------- */
main{display:block}
.section{padding:88px 0}
.section-tight{padding:56px 0}
.section-head{margin-bottom:40px}
.section-title{font-size:clamp(1.6rem,2.8vw,2.35rem); line-height:1.18; font-weight:700}
.section-desc{margin-top:14px; color:var(--text-mid); font-size:16px; max-width:640px}

.article-layout{display:grid; grid-template-columns:minmax(0,1fr); gap:56px}
.article-col{min-width:0}
.article-panel{
  background:var(--ink-700); border:1px solid var(--line); border-radius:var(--r-lg);
  padding:clamp(22px,3.4vw,52px);
}

/* ---------- rich text ---------- */
.article-body{max-width:780px; font-size:17px; line-height:1.9; color:var(--text-mid)}
.article-body > * + *{margin-top:1.2em}
.article-body h2{
  position:relative; font-size:clamp(1.35rem,2.1vw,1.7rem); line-height:1.35; font-weight:700;
  color:var(--text-hi); margin-top:56px; padding-left:16px;
}
.article-body h2::before{
  content:""; position:absolute; left:0; top:.35em; width:4px; height:24px;
  background:var(--neon-1); border-radius:2px; box-shadow:0 0 16px -2px rgba(53,224,208,.85);
}
.article-body h3{font-size:1.2rem; line-height:1.5; font-weight:600; color:var(--text-hi); margin-top:2em}
.article-body h4{font-size:1.05rem; font-weight:600; color:var(--text-hi); margin-top:1.6em}
.article-body p{color:var(--text-mid)}
.article-body strong{color:var(--text-hi); font-weight:700}
.article-body ul,.article-body ol{margin-top:1.1em; margin-bottom:1.1em; padding-left:0}
.article-body li{position:relative; padding-left:22px; line-height:1.75; margin-top:.6em}
.article-body ul > li::before{
  content:""; position:absolute; left:0; top:.68em; width:7px; height:7px;
  background:rgba(53,224,208,.85); border-radius:2px;
}
.article-body ol{counter-reset:item}
.article-body ol > li{counter-increment:item; padding-left:34px}
.article-body ol > li::before{
  content:counter(item,decimal-leading-zero);
  position:absolute; left:0; top:0; font-family:var(--font-mono); font-size:13px; color:var(--neon-1);
}
.article-body blockquote{
  margin:1.6em 0; padding:18px 22px; border-left:2px solid var(--neon-1);
  background:rgba(53,224,208,.06); border-radius:0 var(--r-sm) var(--r-sm) 0; color:var(--text-hi);
}
.article-body blockquote p{color:var(--text-hi)}
.article-body img{border-radius:var(--r-md); border:1px solid var(--line); margin:1.6em 0; width:100%; height:auto}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px; color:var(--text-lo); text-align:center; margin-top:10px; letter-spacing:.02em}
.article-body a{color:var(--neon-1); border-bottom:1px solid rgba(53,224,208,.35); padding-bottom:1px}
.article-body a:hover{border-bottom-color:var(--neon-1); border-bottom-style:solid}
.article-body pre{
  background:var(--ink-900); border:1px solid var(--line); border-radius:var(--r-md);
  padding:18px 20px; overflow-x:auto; font-family:var(--font-mono); font-size:14px; line-height:1.7; color:#CBD6E2;
}
.article-body code{
  font-family:var(--font-mono); font-size:.92em; background:var(--ink-900);
  border:1px solid var(--line); border-radius:6px; padding:2px 6px; color:var(--neon-1);
}
.article-body pre code{background:none; border:0; padding:0; color:inherit}
.article-body hr{border:0; border-top:1px solid var(--line); margin:2.4em 0}
.table-scroll{overflow-x:auto; margin:1.6em 0; border:1px solid var(--line); border-radius:var(--r-md)}
.article-body table{width:100%; border-collapse:collapse; min-width:520px; font-size:15px}
.article-body th,.article-body td{
  border-bottom:1px solid var(--line); padding:12px 16px; text-align:left; line-height:1.7;
}
.article-body th{background:var(--ink-700); color:var(--text-hi); font-weight:600; white-space:nowrap}
.article-body tr:last-child td{border-bottom:0}

.article-foot{
  margin-top:48px; padding-top:24px; border-top:1px solid var(--line);
  display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
}
.article-foot .fb-text{font-size:14px; color:var(--text-lo)}

.empty-state{
  text-align:center; padding:72px 20px; border:1px dashed var(--line-strong); border-radius:var(--r-lg);
  background:var(--ink-700);
}
.empty-state .icon{width:52px; height:52px; margin:0 auto 18px; border:1px solid var(--line-strong); border-radius:14px; display:flex; align-items:center; justify-content:center}
.empty-state h2{font-size:1.25rem; margin-bottom:10px}
.empty-state p{font-size:15px; color:var(--text-lo); margin-bottom:22px}

/* ---------- sidebar ---------- */
.article-side{display:none}
.side-card{
  background:var(--surface-1); border:1px solid var(--line); border-radius:var(--r-md);
  padding:22px; position:sticky; top:96px;
}
.side-card + .side-card{margin-top:20px}
.side-title{font-size:14px; font-weight:700; color:var(--text-hi); letter-spacing:.04em; margin-bottom:14px}
.side-list li + li{border-top:1px solid var(--line)}
.side-list a{display:flex; align-items:center; justify-content:space-between; gap:10px; padding:11px 0; font-size:14px; color:var(--text-mid)}
.side-list a:hover{color:var(--neon-1)}
.side-list .num{font-family:var(--font-mono); font-size:12px; color:var(--text-lo)}
.side-note{font-size:13px; line-height:1.8; color:var(--text-lo)}

/* ---------- related cards ---------- */
.card-grid{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:24px}
.card{
  display:flex; flex-direction:column; background:var(--surface-1); border:1px solid var(--line);
  border-radius:var(--r-md); overflow:hidden; box-shadow:var(--shadow-card);
  transition:transform .26s var(--ease), box-shadow .26s var(--ease), border-color .26s var(--ease);
}
.card:hover{transform:translateY(-4px); box-shadow:var(--shadow-hover); border-color:rgba(53,224,208,.45)}
.card-media{position:relative; aspect-ratio:16/9; overflow:hidden; background:var(--ink-900)}
.card-media img{width:100%; height:100%; object-fit:cover; transition:transform .26s var(--ease)}
.card:hover .card-media img{transform:scale(1.04)}
.card-media::after{content:""; position:absolute; inset:0; background:linear-gradient(180deg, rgba(7,9,12,.1), rgba(7,9,12,.55))}
.card-media .badge{position:absolute; left:12px; top:12px; z-index:2; background:rgba(7,9,12,.72)}
.card-body{padding:20px 22px 22px; display:flex; flex-direction:column; gap:10px; flex:1}
.card-title{font-size:1.05rem; line-height:1.5; font-weight:600; color:var(--text-hi)}
.card-text{font-size:14px; line-height:1.8; color:var(--text-mid)}
.card-foot{
  margin-top:auto; display:flex; align-items:center; justify-content:space-between; gap:10px;
  font-family:var(--font-mono); font-size:12px; color:var(--text-lo); letter-spacing:.02em;
}

/* ---------- faq ---------- */
.faq-layout{display:grid; grid-template-columns:4fr 8fr; gap:48px}
.faq-side{position:sticky; top:96px; align-self:start}
.faq-side p{margin-top:14px; font-size:15px; color:var(--text-mid); max-width:340px}
.faq-side .btn{margin-top:22px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%; display:flex; align-items:center; justify-content:space-between; gap:20px;
  background:transparent; border:0; padding:22px 0; text-align:left; cursor:pointer;
  font-size:17px; font-weight:600; color:var(--text-hi); transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--neon-1)}
.faq-item.is-open .faq-q{color:var(--neon-1)}
.faq-sign{
  flex:none; width:26px; height:26px; border:1px solid var(--line-strong); border-radius:8px;
  display:flex; align-items:center; justify-content:center; font-family:var(--font-mono);
  font-size:15px; color:var(--text-mid); transition:transform .3s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}
.faq-item.is-open .faq-sign{transform:rotate(180deg); border-color:rgba(53,224,208,.6); color:var(--neon-1)}
.faq-a{max-height:0; overflow:hidden; transition:max-height .32s var(--ease)}
.faq-a p{padding:0 0 22px; font-size:15px; line-height:1.85; color:var(--text-mid); max-width:640px}

/* ---------- mini cta strip ---------- */
.strip{
  display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap;
  border:1px solid var(--line); border-radius:var(--r-md); padding:22px 26px; background:var(--ink-700);
}
.strip p{font-size:15px; color:var(--text-mid)}
.strip strong{color:var(--text-hi)}

/* ---------- cta ---------- */
.cta-section{padding:0 0 120px}
.cta-box{
  position:relative; overflow:hidden; border:1px solid rgba(53,224,208,.45); border-radius:var(--r-lg);
  background:var(--ink-900);
  box-shadow:0 0 0 1px rgba(53,224,208,.15), 0 40px 80px -50px rgba(0,0,0,1);
  padding:clamp(26px,4vw,56px);
}
.cta-box::before{
  content:""; position:absolute; inset:0; opacity:.5; pointer-events:none;
  background-image:linear-gradient(rgba(53,224,208,.06) 1px, transparent 1px),
                   linear-gradient(90deg, rgba(53,224,208,.06) 1px, transparent 1px);
  background-size:48px 48px;
}
.cta-grid{position:relative; z-index:2; display:grid; grid-template-columns:6fr 6fr; gap:48px; align-items:start}
.cta-title{font-size:clamp(1.55rem,2.6vw,2.1rem); line-height:1.22; font-weight:700}
.cta-desc{margin-top:14px; font-size:15px; color:var(--text-mid); max-width:440px}
.cta-points{margin-top:26px; display:flex; flex-direction:column; gap:14px}
.cta-points li{display:flex; align-items:flex-start; gap:10px; font-size:15px; color:var(--text-mid)}
.cta-points svg{flex:none; margin-top:5px}
.cta-form{display:grid; grid-template-columns:1fr 1fr; gap:16px; background:rgba(18,23,30,.72); border:1px solid var(--line); border-radius:var(--r-md); padding:24px}
.field{display:flex; flex-direction:column; gap:8px}
.field.full{grid-column:1 / -1}
.field label{font-size:13px; color:var(--text-lo); letter-spacing:.02em}
.field input,.field textarea{
  height:48px; padding:0 14px; background:var(--surface-2); border:1px solid var(--line);
  border-radius:10px; color:var(--text-hi); transition:border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.field textarea{height:auto; min-height:96px; padding:12px 14px; line-height:1.7; resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--text-lo)}
.field input:focus,.field textarea:focus{
  outline:none; border-color:var(--neon-1); box-shadow:0 0 0 3px rgba(53,224,208,.16);
}
.form-note{grid-column:1 / -1; font-size:12px; line-height:1.7; color:var(--text-lo)}
.form-note a{color:var(--neon-1)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900); border-top:1px solid var(--line); padding:64px 0 28px}
.footer-grid{display:grid; grid-template-columns:1.5fr 1fr 1fr 1fr; gap:40px}
.footer-brand p{margin-top:18px; font-size:14px; line-height:1.85; color:var(--text-lo); max-width:320px}
.footer-contact{margin-top:16px; font-family:var(--font-mono); font-size:13px; line-height:1.9; color:var(--text-lo)}
.footer-title{font-size:14px; font-weight:700; color:var(--text-hi); letter-spacing:.04em; margin-bottom:16px}
.footer-list li + li{margin-top:10px}
.footer-list a{font-size:14px; color:var(--text-mid)}
.footer-list a:hover{color:var(--neon-1)}
.footer-tags{
  margin-top:48px; padding-top:22px; border-top:1px solid var(--line);
  display:flex; flex-wrap:wrap; gap:10px;
}
.footer-tags a{
  font-size:13px; padding:6px 14px; border:1px solid var(--line); border-radius:var(--r-pill);
  color:var(--text-mid);
}
.footer-tags a:hover{border-color:rgba(53,224,208,.5); color:var(--neon-1); background:rgba(53,224,208,.06)}
.footer-bottom{
  margin-top:26px; padding-top:20px; border-top:1px solid var(--line);
  display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
  font-size:13px; color:var(--text-lo);
}

/* ---------- drawer / to-top ---------- */
.mobile-drawer{
  position:fixed; inset:0; z-index:90; background:var(--ink-900);
  padding:88px 20px 32px; display:flex; flex-direction:column;
  transform:translateX(100%); transition:transform .3s var(--ease); visibility:hidden;
}
.mobile-drawer.is-open{transform:translateX(0); visibility:visible}
.drawer-link{
  display:flex; align-items:center; height:48px; padding-left:14px; font-size:16px; color:var(--text-mid);
  border-left:3px solid transparent; border-bottom:1px solid var(--line);
}
.drawer-link.is-active{color:var(--neon-1); border-left-color:var(--neon-1); background:rgba(53,224,208,.05)}
.mobile-drawer .btn{margin-top:auto}
.to-top{
  position:fixed; right:22px; bottom:22px; z-index:70; width:44px; height:44px; border-radius:50%;
  display:flex; align-items:center; justify-content:center; cursor:pointer;
  background:var(--surface-1); border:1px solid var(--line-strong); color:var(--text-hi);
  opacity:0; visibility:hidden; transition:opacity .25s var(--ease), visibility .25s var(--ease), border-color .2s var(--ease);
}
.to-top.is-visible{opacity:1; visibility:visible}
.to-top:hover{border-color:var(--neon-1); color:var(--neon-1)}

/* ---------- responsive ---------- */
@media (min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,8fr) 3fr}
  .article-side{display:block}
}
@media (max-width:1279px){
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1023px){
  .nav-desktop,.nav-divider{display:none}
  .menu-toggle{display:flex}
  .nav-inner{justify-content:space-between}
  .nav-actions .btn-primary{display:none}
  .container{padding:0 24px}
  .section{padding:88px 0}
  .faq-layout{grid-template-columns:1fr; gap:32px}
  .faq-side{position:static}
  .cta-grid{grid-template-columns:1fr; gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr; gap:32px}
}
@media (max-width:767px){
  body{font-size:16px; line-height:1.85}
  .container{padding:0 20px}
  .section{padding:64px 0}
  .section-tight{padding:48px 0}
  .page-head .container{padding-top:28px; padding-bottom:40px}
  .page-head{background-position:center}
  .page-head::before{background:linear-gradient(180deg, rgba(7,9,12,.9) 0%, rgba(7,9,12,.78) 55%, rgba(7,9,12,.92) 100%)}
  .article-title{font-size:clamp(1.6rem,7vw,2.1rem)}
  .head-actions .btn{width:100%}
  .card-grid{grid-template-columns:1fr}
  .article-body{font-size:16px; line-height:1.85}
  .article-panel{padding:22px 18px; border-radius:var(--r-md)}
  .meta-bar{gap:10px}
  .breadcrumb .current{max-width:180px}
  .footer-grid{grid-template-columns:1fr; gap:28px}
  .footer-bottom{flex-direction:column; align-items:flex-start}
  .cta-form{grid-template-columns:1fr; padding:20px}
  .btn{width:100%}
  .head-actions{width:100%}
  .strip .btn{width:100%}
  .article-foot{flex-direction:column; align-items:stretch}
  .article-foot .btn{width:100%}
  .to-top{right:14px; bottom:14px}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none !important; transition:none !important}
  .card:hover{transform:none}
  .card:hover .card-media img{transform:none}
}

/* roulang page: category1 */
:root{
  --ink-900:#07090C;
  --ink-800:#0C1015;
  --ink-700:#12171E;
  --surface-1:#161C24;
  --surface-2:#1D242D;
  --line:#262E38;
  --line-strong:#333D49;
  --text-hi:#F2F5F8;
  --text-mid:#A9B4C0;
  --text-lo:#6C7885;
  --neon-1:#35E0D0;
  --neon-2:#FF3D81;
  --neon-3:#FFB454;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","SF Mono",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-800);
  color:var(--text-mid);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:0;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--neon-1);outline-offset:2px}
::selection{background:rgba(53,224,208,.28);color:#fff}
body{scrollbar-color:#2a333d var(--ink-900)}
body::-webkit-scrollbar{width:10px}
body::-webkit-scrollbar-track{background:var(--ink-900)}
body::-webkit-scrollbar-thumb{background:#2a333d;border-radius:999px}
body::-webkit-scrollbar-thumb:hover{background:#3a4652}

body .container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(12,16,21,.92);
  border-bottom:1px solid transparent;
  transition:border-color .28s var(--ease),background .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,224,208,.75),transparent);
  opacity:0;transition:opacity .28s var(--ease);
}
.site-header.is-scrolled{background:rgba(7,9,12,.96);box-shadow:0 18px 40px -30px rgba(0,0,0,.95)}
.site-header.is-scrolled::after{opacity:1}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-hi);font-weight:700;font-size:17px;letter-spacing:.01em}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;filter:drop-shadow(0 0 8px rgba(53,224,208,.5));transition:transform .26s var(--ease)}
.brand:hover .brand-mark{transform:rotate(45deg)}
.brand-text{white-space:nowrap}
.nav-desktop{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:10px 14px;border-radius:var(--r-sm);
  font-size:15px;color:var(--text-mid);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link:hover{color:var(--text-hi);background:rgba(255,255,255,.035)}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--neon-1);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .26s var(--ease),box-shadow .26s var(--ease);
}
.nav-link:hover::after{transform:scaleX(.45)}
.nav-link.is-active{color:var(--text-hi);text-shadow:0 0 14px rgba(53,224,208,.45)}
.nav-link.is-active::after{transform:scaleX(1);box-shadow:0 0 12px rgba(53,224,208,.7)}
.nav-actions{display:flex;align-items:center;gap:14px}
.nav-divider{width:1px;height:22px;background:var(--line)}
.menu-toggle{
  display:none;position:relative;width:44px;height:44px;
  border:1px solid var(--line);border-radius:var(--r-sm);
  background:transparent;cursor:pointer;
}
.menu-toggle span{
  position:absolute;left:12px;width:20px;height:1.6px;background:var(--text-hi);
  transition:transform .24s var(--ease),opacity .2s var(--ease),background .2s var(--ease);
}
.menu-toggle span:nth-child(1){top:15px}
.menu-toggle span:nth-child(2){top:21px}
.menu-toggle span:nth-child(3){top:27px}
.menu-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);background:var(--neon-1)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);background:var(--neon-1)}

/* ============ 按钮 ============ */
.btn{
  position:relative;overflow:hidden;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:10px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:color .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease),transform .12s var(--ease);
}
.btn:active{transform:scale(.985)}
.btn-primary{background:var(--neon-1);color:#07090C;box-shadow:0 0 0 1px rgba(53,224,208,.5),0 14px 34px -20px rgba(53,224,208,.8)}
.btn-primary:hover{filter:brightness(1.07);box-shadow:0 0 0 1px rgba(53,224,208,.7),0 18px 40px -18px rgba(53,224,208,.75)}
.btn-primary::after{
  content:"";position:absolute;top:0;left:-60%;width:45%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);
  transform:skewX(-18deg);transition:left .45s var(--ease);
}
.btn-primary:hover::after{left:120%}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-hi)}
.btn-ghost:hover{border-color:rgba(53,224,208,.6);background:rgba(53,224,208,.08)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:52px;padding:0 28px}
.btn-block{width:100%}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--neon-1);font-size:14.5px;font-weight:600;
  transition:color .18s var(--ease)
}
.btn-text .arw{transition:transform .18s var(--ease)}
.btn-text:hover .arw{transform:translateX(4px)}
.btn-text:hover{color:#6ef0e2}

/* ============ 移动抽屉 ============ */
.mobile-drawer{
  position:fixed;inset:0;z-index:90;
  background:var(--ink-900);
  display:flex;flex-direction:column;
  padding:88px 24px 28px;
  transform:translateX(100%);
  visibility:hidden;
  transition:transform .32s var(--ease),visibility .32s var(--ease);
}
.mobile-drawer.is-open{transform:translateX(0);visibility:visible}
.drawer-link{
  display:flex;align-items:center;height:48px;
  border-left:3px solid transparent;padding-left:14px;
  color:var(--text-mid);font-size:16px;
  border-bottom:1px solid var(--line);
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.drawer-link:hover{color:var(--text-hi);background:rgba(255,255,255,.03)}
.drawer-link.is-active{color:var(--text-hi);border-left-color:var(--neon-1);background:rgba(53,224,208,.06)}
.drawer-foot{margin-top:auto;padding-top:20px}

/* ============ 面包屑 ============ */
.crumb{padding:20px 0 0}
.crumb-list{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-lo);flex-wrap:wrap}
.crumb-list a{transition:color .18s var(--ease)}
.crumb-list a:hover{color:var(--neon-1)}
.crumb-sep{color:var(--line-strong)}
.crumb-current{color:var(--text-mid);max-width:22ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 页头 ============ */
.page-hero{
  position:relative;min-height:320px;display:flex;align-items:flex-end;
  margin-top:20px;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(7,9,12,.94) 0%,rgba(7,9,12,.72) 46%,rgba(7,9,12,.34) 100%);
}
.page-hero-inner{position:relative;width:100%;padding:52px 44px}
.badge{
  display:inline-flex;align-items:center;gap:8px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;letter-spacing:.02em;
  background:rgba(53,224,208,.12);color:var(--neon-1);
  border:1px solid rgba(53,224,208,.3);
}
.badge-magenta{background:rgba(255,61,129,.14);color:#ff86b0;border-color:rgba(255,61,129,.34)}
.page-hero h1{
  margin-top:18px;
  font-size:clamp(2.3rem,5.4vw,4.2rem);
  line-height:1.08;font-weight:800;letter-spacing:-.02em;
  color:var(--text-hi);max-width:16ch;
}
.page-hero-sub{margin-top:16px;font-size:16.5px;color:var(--text-mid);max-width:560px}

/* ============ 锚点条 ============ */
.anchor-bar{margin-top:24px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.anchor-bar-inner{
  display:flex;gap:10px;align-items:center;
  padding:14px 0;overflow-x:auto;scrollbar-width:none;
}
.anchor-bar-inner::-webkit-scrollbar{display:none}
.anchor-chip{
  flex:0 0 auto;display:inline-flex;align-items:center;height:34px;padding:0 14px;
  border-radius:var(--r-pill);border:1px solid var(--line);
  font-size:13.5px;color:var(--text-mid);white-space:nowrap;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.anchor-chip:hover{color:var(--text-hi);border-color:rgba(53,224,208,.55);background:rgba(53,224,208,.07)}

/* ============ 板块基础 ============ */
.section{padding:112px 0}
.section-tight{padding:88px 0}
.eyebrow{display:flex;align-items:center;gap:12px;font-size:13px;letter-spacing:.14em;color:var(--neon-1);font-family:var(--font-mono)}
.eyebrow-line{display:inline-block;width:24px;height:1px;background:var(--neon-1);box-shadow:0 0 8px rgba(53,224,208,.8)}
.section-head{margin-bottom:44px}
.section-head h2{
  margin-top:14px;
  font-size:clamp(1.6rem,2.8vw,2.35rem);
  line-height:1.18;font-weight:700;color:var(--text-hi);letter-spacing:-.01em;
  max-width:22ch;
}
.section-head .lead{margin-top:14px;max-width:620px;font-size:16px;color:var(--text-mid)}

/* ============ 主体双栏 ============ */
.layout{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:start}
.article-body{max-width:100%}
.article-body section{scroll-margin-top:110px}
.article-body section + section{margin-top:64px}
.article-body h2{
  position:relative;padding-left:16px;
  font-size:clamp(1.35rem,2.1vw,1.75rem);line-height:1.3;font-weight:700;color:var(--text-hi);
  margin-bottom:18px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.32em;width:4px;height:1.05em;
  background:var(--neon-1);border-radius:2px;box-shadow:0 0 10px rgba(53,224,208,.6);
}
.article-body h3{margin:28px 0 10px;font-size:1.15rem;font-weight:600;color:var(--text-hi)}
.article-body p{font-size:16.5px;line-height:1.9;color:var(--text-mid)}
.article-body p + p{margin-top:14px}
.article-body ul,.article-body ol{margin:18px 0 6px;display:grid;gap:12px}
.article-body li{position:relative;padding-left:26px;font-size:16px;line-height:1.8;color:var(--text-mid)}
.article-body ul li::before{
  content:"";position:absolute;left:6px;top:.72em;width:7px;height:7px;
  background:var(--neon-1);border-radius:2px;transform:rotate(45deg);
}
.article-body ol{counter-reset:step}
.article-body ol li{counter-increment:step}
.article-body ol li::before{
  content:counter(step,decimal-leading-zero);
  position:absolute;left:0;top:.15em;
  font-family:var(--font-mono);font-size:12.5px;color:var(--neon-3);letter-spacing:.04em;
}
.note-line{
  margin-top:22px;padding:16px 20px;border-left:2px solid var(--neon-1);
  background:rgba(53,224,208,.06);border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:15.5px;color:var(--text-mid);
}
.figure-inline{margin-top:24px}
.figure-inline img{border-radius:var(--r-md);border:1px solid var(--line);aspect-ratio:16/9;object-fit:cover;width:100%}
.figure-inline figcaption{margin-top:10px;font-size:13px;color:var(--text-lo);text-align:center}

/* ============ sticky 侧栏 ============ */
.side-sticky{position:sticky;top:96px;display:grid;gap:20px}
.side-card{
  background:var(--surface-1);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:0 0 0 1px var(--line);
  transition:border-color .26s var(--ease),box-shadow .26s var(--ease);
}
.side-card:hover{border-color:rgba(53,224,208,.45);box-shadow:0 0 0 1px rgba(53,224,208,.4),0 22px 48px -30px rgba(0,0,0,.95)}
.side-title{font-size:13px;letter-spacing:.12em;color:var(--text-lo);font-family:var(--font-mono);text-transform:uppercase}
.toc{margin-top:16px;display:grid;gap:2px}
.toc a{
  display:flex;align-items:flex-start;gap:10px;
  padding:9px 10px;border-radius:var(--r-sm);font-size:14.5px;color:var(--text-mid);
  border-left:2px solid transparent;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}
.toc a:hover{color:var(--text-hi);background:var(--surface-2);border-left-color:var(--neon-1)}
.toc i{font-family:var(--font-mono);font-style:normal;font-size:12px;color:var(--neon-3);padding-top:3px}
.key-card{background:var(--ink-700);border-color:var(--line-strong)}
.key-list{margin-top:16px;display:grid;gap:14px}
.key-list li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;line-height:1.75;color:var(--text-mid)}
.key-dot{
  flex:0 0 auto;margin-top:.55em;width:6px;height:6px;border-radius:50%;
  background:var(--neon-2);box-shadow:0 0 10px rgba(255,61,129,.75);
}
.key-card .btn{width:100%;margin-top:20px}

/* ============ CTA 条 ============ */
.cta-strip{margin-top:96px}
.cta-strip-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 28px;border-radius:var(--r-md);
  border:1px solid rgba(53,224,208,.4);
  background:linear-gradient(90deg,rgba(53,224,208,.09),rgba(7,9,12,.2) 60%,transparent);
  box-shadow:0 0 26px -14px rgba(53,224,208,.6);
}
.cta-strip-text{font-size:16px;color:var(--text-hi);font-weight:600}
.cta-strip-text span{display:block;margin-top:4px;font-size:14px;font-weight:400;color:var(--text-mid)}

/* ============ 要点网格 ============ */
.bento{
  margin-top:8px;
  display:grid;gap:20px;
  grid-template-columns:1.28fr 1fr;grid-template-rows:auto auto;
}
.bento-item{
  position:relative;overflow:hidden;
  background:var(--surface-1);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px;
  transition:transform .26s var(--ease),border-color .26s var(--ease),box-shadow .26s var(--ease);
}
.bento-item:hover{
  transform:translateY(-4px);
  border-color:rgba(53,224,208,.5);
  box-shadow:0 0 0 1px rgba(53,224,208,.4),0 24px 50px -32px rgba(0,0,0,.95),0 0 26px -12px rgba(53,224,208,.55);
}
.bento-lg{grid-row:1 / span 2;display:flex;flex-direction:column}
.bento-num{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.12em;color:var(--text-lo)}
.bento-title{margin-top:12px;font-size:1.22rem;line-height:1.45;font-weight:600;color:var(--text-hi)}
.bento-text{margin-top:10px;font-size:15px;line-height:1.8;color:var(--text-mid)}
.bento-media{margin-top:auto;padding-top:22px}
.bento-media img{border-radius:var(--r-md);border:1px solid var(--line);aspect-ratio:16/9;object-fit:cover;width:100%;transition:transform .26s var(--ease)}
.bento-item:hover .bento-media img{transform:scale(1.02)}
.bento-arrow{margin-top:16px;display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--neon-1)}
.bento-arrow i{font-style:normal;transition:transform .18s var(--ease)}
.bento-item:hover .bento-arrow i{transform:translateX(4px)}

/* ============ FAQ ============ */
.faq{margin-top:8px}
.faq-grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:56px;align-items:start}
.faq-aside{position:sticky;top:96px}
.faq-aside h2{margin-top:14px;font-size:clamp(1.6rem,2.8vw,2.35rem);line-height:1.18;font-weight:700;color:var(--text-hi)}
.faq-aside p{margin-top:14px;font-size:15.5px;color:var(--text-mid);max-width:340px}
.faq-aside .btn{margin-top:22px}
.faq-list{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;background:transparent;border:0;text-align:left;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--text-hi);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--neon-1)}
.faq-icon{
  flex:0 0 auto;position:relative;width:18px;height:18px;
  transition:transform .32s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--text-mid);border-radius:2px;
  transition:background .2s var(--ease),opacity .2s var(--ease);
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item.is-open .faq-q{color:var(--neon-1)}
.faq-item.is-open .faq-icon{transform:rotate(180deg)}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:var(--neon-1)}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .32s var(--ease),opacity .32s var(--ease);
  opacity:0;
}
.faq-item.is-open .faq-a{opacity:1}
.faq-a p{padding:0 0 22px;font-size:15px;line-height:1.85;color:var(--text-mid);max-width:660px}

/* ============ 页脚 ============ */
.site-footer{margin-top:120px;background:var(--ink-900);border-top:1px solid var(--line);padding:72px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{margin-top:16px;font-size:14.5px;line-height:1.8;color:var(--text-lo);max-width:320px}
.footer-contact{margin-top:16px;font-size:13.5px;line-height:1.9;color:var(--text-lo);font-family:var(--font-mono)}
.footer-title{font-size:13px;letter-spacing:.12em;color:var(--text-hi);font-weight:600;margin-bottom:16px}
.footer-list{display:grid;gap:10px}
.footer-list a{font-size:14.5px;color:var(--text-mid);transition:color .18s var(--ease),padding-left .18s var(--ease)}
.footer-list a:hover{color:var(--neon-1);padding-left:4px}
.footer-tags{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:48px;padding-top:26px;border-top:1px solid var(--line);
}
.footer-tags a{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;
  border-radius:var(--r-pill);border:1px solid var(--line);
  font-size:13px;color:var(--text-mid);
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.footer-tags a:hover{color:var(--text-hi);border-color:rgba(53,224,208,.55);background:rgba(53,224,208,.07)}
.footer-bottom{
  margin-top:26px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-lo);
}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--surface-1);border:1px solid var(--line-strong);color:var(--text-hi);
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .26s var(--ease),visibility .26s var(--ease),transform .26s var(--ease),border-color .18s var(--ease);
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:rgba(53,224,208,.6);box-shadow:0 0 20px -8px rgba(53,224,208,.8)}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-desktop{display:none}
  .nav-divider{display:none}
  .menu-toggle{display:block}
  body .container{padding:0 24px}
  .layout{grid-template-columns:1fr;gap:44px}
  .side-sticky{position:static}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .faq-aside{position:static}
  .bento{grid-template-columns:1fr 1fr}
  .bento-lg{grid-column:1 / span 2;grid-row:auto}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .section{padding:88px 0}
  .section-tight{padding:72px 0}
}
@media (max-width:767px){
  body{font-size:16px;line-height:1.85}
  body .container{padding:0 20px}
  .nav-inner{height:62px}
  .brand{font-size:16px}
  .page-hero{min-height:auto;border-radius:var(--r-md)}
  .page-hero-inner{padding:36px 22px}
  .page-hero h1{max-width:100%;font-size:clamp(2rem,8.4vw,2.6rem)}
  .article-body section + section{margin-top:52px}
  .bento{grid-template-columns:1fr}
  .bento-lg{grid-column:auto}
  .cta-strip-inner{flex-direction:column;align-items:flex-start;padding:22px}
  .cta-strip-inner .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .btn{width:100%;min-height:48px}
  .side-card .btn,.cta-strip-inner .btn{width:100%}
  .to-top{right:16px;bottom:16px;width:44px;height:44px}
  .section{padding:64px 0}
  .section-tight{padding:56px 0}
  .site-footer{padding:56px 0 26px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --ink-900:#07090C;--ink-800:#0C1015;--ink-700:#12171E;
  --surface-1:#161C24;--surface-2:#1D242D;
  --line:#262E38;--line-strong:#333D49;
  --text-hi:#F2F5F8;--text-mid:#A9B4C0;--text-lo:#6C7885;
  --neon-1:#35E0D0;--neon-2:#FF3D81;--neon-3:#FFB454;
  --r-sm:8px;--r-md:14px;--r-lg:20px;--r-pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SF Mono",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ink-900);color:var(--text-mid);font-family:var(--font-sans);font-size:16px;line-height:1.85;letter-spacing:0;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;background:none;border:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--neon-1);outline-offset:2px}
::selection{background:rgba(53,224,208,.28);color:#fff}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--neon-1);color:#07090C;padding:10px 18px;border-radius:0 0 10px 0;z-index:200}
.skip-link:focus{left:0}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:var(--ink-800);border-bottom:1px solid transparent;transition:border-color .3s var(--ease),background .3s var(--ease),box-shadow .3s var(--ease)}
.site-header.is-scrolled{background:var(--ink-900);border-bottom-color:rgba(53,224,208,.42);box-shadow:0 14px 40px -32px #000}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;filter:drop-shadow(0 0 10px rgba(53,224,208,.35))}
.brand-text{font-size:17px;font-weight:700;color:var(--text-hi);letter-spacing:.01em;white-space:nowrap}
.nav-desktop{display:flex;align-items:center;gap:4px}
.nav-link{position:relative;padding:10px 13px;font-size:15px;color:var(--text-mid);transition:color .18s var(--ease)}
.nav-link:hover{color:var(--text-hi)}
.nav-link::after{content:"";position:absolute;left:13px;right:13px;bottom:4px;height:2px;border-radius:2px;background:var(--neon-1);transform:scaleX(0);transform-origin:left;transition:transform .26s var(--ease)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--text-hi);text-shadow:0 0 14px rgba(53,224,208,.5)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:16px}
.nav-divider{width:1px;height:22px;background:var(--line-strong)}
.menu-toggle{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line-strong);flex-direction:column;align-items:center;justify-content:center;gap:5px;transition:border-color .2s var(--ease)}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--text-hi);border-radius:2px;transition:transform .26s var(--ease),opacity .2s var(--ease)}
.menu-toggle:hover{border-color:var(--neon-1)}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-drawer{position:fixed;top:68px;left:0;right:0;bottom:0;background:var(--ink-900);z-index:70;padding:20px 0 40px;overflow-y:auto;transform:translateY(-10px);opacity:0;visibility:hidden;transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s}
.mobile-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible}
.mobile-drawer a.dr-link{display:flex;align-items:center;height:52px;padding:0 32px;font-size:16px;color:var(--text-mid);border-left:3px solid transparent;transition:color .2s var(--ease),background .2s var(--ease)}
.mobile-drawer a.dr-link:hover{color:var(--text-hi);background:rgba(53,224,208,.05)}
.mobile-drawer a.dr-link.is-active{color:var(--neon-1);border-left-color:var(--neon-1);background:rgba(53,224,208,.07)}
.mobile-drawer .dr-cta{padding:24px 32px 0}

/* ---------- 按钮 ---------- */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;overflow:hidden;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .26s var(--ease),transform .12s var(--ease)}
.btn-primary{background:var(--neon-1);color:#07090C}
.btn-primary::after{content:"";position:absolute;top:-10%;left:-130%;width:55%;height:120%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);transform:skewX(-18deg);transition:left .45s var(--ease)}
.btn-primary:hover::after{left:140%}
.btn-primary:hover{box-shadow:0 0 28px -8px rgba(53,224,208,.75)}
.btn-primary:active{transform:scale(.985)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-hi)}
.btn-ghost:hover{border-color:var(--neon-1);background:rgba(53,224,208,.08)}
.btn-ghost:active{transform:scale(.985)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%;height:52px}

/* ---------- 标签 / 徽章 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);font-size:12px;letter-spacing:.02em;background:rgba(53,224,208,.12);color:var(--neon-1);border:1px solid rgba(53,224,208,.3)}
.badge-magenta{background:rgba(255,61,129,.12);color:#FF7BA8;border-color:rgba(255,61,129,.34)}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:var(--r-pill);font-size:12px;letter-spacing:.02em;background:rgba(53,224,208,.1);color:var(--neon-1);border:1px solid rgba(53,224,208,.28)}
.eyebrow{display:inline-flex;align-items:center;gap:12px;font-size:13px;letter-spacing:.14em;color:var(--text-lo)}
.eyebrow::after{content:"";width:24px;height:1px;background:var(--neon-1)}

/* ---------- 面包屑 / 页头 ---------- */
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-lo);flex-wrap:wrap}
.breadcrumb a{transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--neon-1)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .current{color:var(--text-mid)}
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:var(--ink-900)}
.page-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.6}
.page-hero-mask{position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,9,12,.94) 0%,rgba(7,9,12,.74) 48%,rgba(7,9,12,.3) 100%)}
.page-hero-inner{position:relative;z-index:2;padding-top:56px;padding-bottom:52px}
.page-title{font-size:clamp(2.3rem,5vw,3.6rem);line-height:1.08;font-weight:800;letter-spacing:-.02em;color:var(--text-hi);margin:18px 0 14px}
.page-sub{font-size:16px;color:var(--text-mid);max-width:560px}
.hero-stats{display:flex;flex-wrap:wrap;gap:32px;margin-top:34px;padding-top:24px;border-top:1px solid rgba(38,46,56,.9);max-width:620px}
.hero-stat{font-family:var(--font-mono)}
.hero-stat b{display:block;font-size:24px;font-weight:600;color:var(--neon-3);line-height:1.2}
.hero-stat span{font-size:12px;color:var(--text-lo);letter-spacing:.04em}

/* ---------- 锚点条 ---------- */
.anchor-bar{position:sticky;top:68px;z-index:50;background:rgba(12,16,21,.96);border-bottom:1px solid var(--line)}
.anchor-inner{display:flex;align-items:center;gap:10px;height:54px;overflow-x:auto;scrollbar-width:none}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-link{flex:0 0 auto;padding:7px 14px;border-radius:var(--r-pill);border:1px solid var(--line-strong);font-size:13.5px;color:var(--text-mid);transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease)}
.anchor-link:hover{color:var(--text-hi);border-color:var(--neon-1);background:rgba(53,224,208,.07)}

/* ---------- 通用板块 ---------- */
.section{padding:112px 0;scroll-margin-top:140px}
.section-tight{padding:88px 0;scroll-margin-top:140px}
.section-head{max-width:720px;margin-bottom:44px}
.section-title{font-size:clamp(1.6rem,2.8vw,2.35rem);line-height:1.18;font-weight:700;color:var(--text-hi);margin-top:18px}
.section-desc{margin-top:16px;font-size:16px;color:var(--text-mid);max-width:620px}
.mono-note{display:flex;align-items:center;gap:12px;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.02em;color:var(--text-lo)}
.mono-note::before{content:"";width:24px;height:1px;background:var(--neon-1);flex:0 0 auto}

/* ---------- 对比表 ---------- */
.cmp-table-wrap{overflow-x:auto;border-top:1px solid var(--line);border-bottom:1px solid var(--line);-webkit-overflow-scrolling:touch}
.cmp-table{width:100%;min-width:760px;border-collapse:collapse}
.cmp-table thead th{position:sticky;top:68px;z-index:6;background:var(--ink-700);text-align:left;font-size:14px;font-weight:600;color:var(--text-hi);padding:18px 22px;border-bottom:1px solid var(--line-strong);letter-spacing:.02em;min-width:160px}
.cmp-table thead th:first-child{min-width:170px;color:var(--text-mid)}
.cmp-table tbody td{padding:18px 22px;border-bottom:1px solid var(--line);font-size:15px;color:var(--text-mid);vertical-align:top;min-width:160px}
.cmp-table tbody tr:last-child td{border-bottom:none}
.cmp-table tbody td:first-child{color:var(--text-hi);font-weight:600;background:rgba(18,23,30,.5)}
.cmp-table tbody tr{transition:background .22s var(--ease)}
.cmp-table tbody tr:hover{background:rgba(53,224,208,.045)}
.cell-hi{color:var(--neon-1)}
.cell-mute{color:var(--text-lo)}
.cmp-foot{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;margin-top:22px}

/* ---------- 窄 CTA 条 ---------- */
.cta-bar{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;border:1px solid var(--line-strong);border-radius:var(--r-md);background:var(--ink-700);padding:22px 26px;margin-top:56px;transition:border-color .26s var(--ease),box-shadow .26s var(--ease)}
.cta-bar:hover{border-color:rgba(53,224,208,.45);box-shadow:0 0 34px -16px rgba(53,224,208,.7)}
.cta-bar p{font-size:15.5px;color:var(--text-hi);font-weight:500}
.cta-bar p span{color:var(--text-mid);font-weight:400}

/* ---------- 选型建议 ---------- */
.advice-grid{display:grid;grid-template-columns:7fr 5fr;gap:28px;align-items:stretch}
.advice-main{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--r-md);background:var(--ink-700);overflow:hidden;transition:border-color .26s var(--ease),transform .26s var(--ease),box-shadow .26s var(--ease)}
.advice-main:hover{border-color:rgba(53,224,208,.45);transform:translateY(-4px);box-shadow:0 0 0 1px rgba(53,224,208,.35),0 26px 50px -30px #000}
.advice-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-900)}
.advice-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.advice-main:hover .advice-media img{transform:scale(1.04)}
.advice-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,9,12,.15),rgba(7,9,12,.72))}
.advice-body{padding:26px 28px 30px}
.advice-body h3{margin:16px 0 10px;font-size:1.28rem;line-height:1.45;font-weight:600;color:var(--text-hi)}
.advice-body p{font-size:15.5px;max-width:560px}
.advice-side{display:flex;flex-direction:column;gap:18px}
.advice-row{display:flex;align-items:flex-start;gap:18px;padding:24px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface-1);transition:border-color .26s var(--ease),transform .26s var(--ease),background .26s var(--ease);flex:1}
.advice-row:hover{border-color:rgba(53,224,208,.45);transform:translateY(-4px);background:var(--ink-700)}
.advice-no{font-family:var(--font-mono);font-size:13px;color:var(--neon-1);letter-spacing:.06em;padding-top:4px}
.advice-row strong{display:block;font-size:1.08rem;font-weight:600;color:var(--text-hi);margin-bottom:8px}
.advice-row span.r-desc{display:block;font-size:14.5px;color:var(--text-mid);line-height:1.75}
.advice-arrow{margin-left:auto;color:var(--text-lo);transition:transform .24s var(--ease),color .24s var(--ease);flex:0 0 auto;padding-top:4px}
.advice-row:hover .advice-arrow{transform:translateX(4px);color:var(--neon-1)}

/* ---------- 折叠问答 ---------- */
.qa-list{border-top:1px solid var(--line);margin-top:8px}
.qa-item{border-bottom:1px solid var(--line)}
.qa-q{width:100%;display:flex;align-items:center;gap:18px;padding:24px 4px;text-align:left;font-size:17px;font-weight:600;color:var(--text-hi);transition:color .2s var(--ease)}
.qa-q:hover{color:var(--neon-1)}
.qa-no{font-family:var(--font-mono);font-size:13px;color:var(--text-lo);flex:0 0 auto;letter-spacing:.06em}
.qa-icon{margin-left:auto;flex:0 0 auto;font-family:var(--font-mono);font-size:20px;line-height:1;color:var(--neon-1);transition:transform .32s var(--ease)}
.qa-item.is-open .qa-icon{transform:rotate(45deg)}
.qa-item.is-open .qa-q{color:var(--neon-1)}
.qa-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.qa-a p{margin:0 0 24px;padding-left:44px;font-size:15px;line-height:1.85;color:var(--text-mid);max-width:780px}

/* ---------- 开通申请 ---------- */
.apply-section{padding:120px 0;scroll-margin-top:140px}
.apply-panel{position:relative;overflow:hidden;border:1px solid rgba(53,224,208,.34);border-radius:var(--r-lg);background:var(--ink-800);padding:48px;box-shadow:0 0 60px -34px rgba(53,224,208,.7)}
.apply-panel::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;background-image:linear-gradient(rgba(53,224,208,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(53,224,208,.05) 1px,transparent 1px);background-size:48px 48px}
.apply-inner{position:relative;z-index:2;display:grid;grid-template-columns:6fr 6fr;gap:48px}
.apply-title{font-size:clamp(1.6rem,2.8vw,2.2rem);line-height:1.2;font-weight:700;color:var(--text-hi);margin:18px 0 14px}
.check-list{margin-top:26px;display:flex;flex-direction:column;gap:14px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-mid)}
.check-list svg{flex:0 0 auto;margin-top:5px}
.apply-form{display:flex;flex-direction:column;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:13px;color:var(--text-mid);letter-spacing:.02em}
.field input,.field select,.field textarea{width:100%;height:48px;border-radius:10px;border:1px solid var(--line-strong);background:var(--surface-2);color:var(--text-hi);padding:0 14px;font-size:15px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease)}
.field textarea{height:auto;min-height:96px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--text-lo)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--neon-1);box-shadow:0 0 0 3px rgba(53,224,208,.16)}
.field.has-error input,.field.has-error select{border-color:rgba(255,61,129,.7)}
.field-error{font-size:12px;color:#FF7BA8;letter-spacing:.02em;display:none}
.field.has-error .field-error{display:block}
.form-tip{font-size:14px;color:var(--neon-1);min-height:22px;letter-spacing:.02em}
.apply-note{margin-top:26px;font-size:12px;color:var(--text-lo);letter-spacing:.02em}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:72px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{margin-top:18px;font-size:14.5px;color:var(--text-mid);max-width:340px}
.footer-contact{margin-top:18px;font-family:var(--font-mono);font-size:12.5px;color:var(--text-lo);line-height:2;letter-spacing:.02em}
.footer-title{font-size:14px;font-weight:600;color:var(--text-hi);margin-bottom:18px;letter-spacing:.02em}
.footer-list li{margin-bottom:12px}
.footer-list a{font-size:14.5px;color:var(--text-mid);transition:color .18s var(--ease),padding-left .18s var(--ease)}
.footer-list a:hover{color:var(--neon-1);padding-left:4px}
.footer-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:52px;padding-top:28px;border-top:1px solid var(--line)}
.footer-tags a{font-size:13px;color:var(--text-lo);padding:6px 12px;border:1px solid var(--line);border-radius:var(--r-pill);transition:color .2s var(--ease),border-color .2s var(--ease)}
.footer-tags a:hover{color:var(--neon-1);border-color:rgba(53,224,208,.45)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;margin-top:28px;padding-top:22px;border-top:1px solid var(--line);font-size:12.5px;color:var(--text-lo);letter-spacing:.02em}

/* ---------- 返回顶部 ---------- */
.back-top{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;border:1px solid var(--line-strong);background:var(--ink-700);color:var(--text-hi);display:flex;align-items:center;justify-content:center;z-index:90;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s,border-color .2s var(--ease)}
.back-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{border-color:var(--neon-1);color:var(--neon-1);box-shadow:0 0 22px -8px rgba(53,224,208,.7)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .section{padding:96px 0}
  .apply-inner{gap:36px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav-desktop{display:none}
  .nav-divider{display:none}
  .nav-actions .btn-sm{display:none}
  .menu-toggle{display:flex}
  .advice-grid{grid-template-columns:1fr;gap:22px}
  .apply-inner{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .section{padding:88px 0}
  .page-hero-bg{opacity:.5}
}
@media (max-width:767px){
  body{font-size:16px;line-height:1.85}
  .container{padding:0 20px}
  .nav-inner{height:64px}
  .mobile-drawer{top:64px}
  .anchor-bar{top:64px}
  .cmp-table thead th{top:64px}
  .brand-text{font-size:15.5px}
  .section{padding:64px 0}
  .section-tight{padding:56px 0}
  .section-head{margin-bottom:32px}
  .page-hero-inner{padding-top:40px;padding-bottom:38px}
  .hero-stats{gap:22px}
  .hero-stat b{font-size:20px}
  .cta-bar{flex-direction:column;align-items:stretch;padding:20px}
  .cta-bar .btn{width:100%}
  .qa-q{font-size:16px;padding:20px 0;gap:12px}
  .qa-a p{padding-left:0}
  .apply-panel{padding:26px 20px}
  .apply-section{padding:72px 0}
  .btn-block{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .back-top{right:16px;bottom:16px}
  .advice-body{padding:22px 20px 24px}
  .advice-row{padding:20px}
}
@media (max-width:520px){
  .hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:18px}
  .cmp-table{min-width:640px}
  .footer-tags a{font-size:12.5px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .advice-main:hover,.advice-row:hover{transform:none}
}

/* roulang page: category3 */
:root{
  --ink-900:#07090C;--ink-800:#0C1015;--ink-700:#12171E;--surface-1:#161C24;--surface-2:#1D242D;
  --line:#262E38;--line-strong:#333D49;
  --text-hi:#F2F5F8;--text-mid:#A9B4C0;--text-lo:#6C7885;
  --neon-1:#35E0D0;--neon-2:#FF3D81;--neon-3:#FFB454;
  --r-sm:8px;--r-md:14px;--r-lg:20px;--r-pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SF Mono",Consolas,monospace;
  --shadow-line:0 0 0 1px var(--line);
  --shadow-hover:0 0 0 1px rgba(53,224,208,.45),0 18px 44px -22px rgba(0,0,0,.9),0 0 26px -10px rgba(53,224,208,.5);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--ink-800);color:var(--text-mid);
  font-family:var(--font-sans);font-size:16.5px;line-height:1.85;letter-spacing:0;
  overflow-x:hidden;
}
body.drawer-open{overflow:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--neon-1);outline-offset:2px;border-radius:4px}
::selection{background:rgba(53,224,208,.25);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--ink-900)}
::-webkit-scrollbar-thumb{background:#2A333E;border-radius:999px;border:2px solid var(--ink-900)}
::-webkit-scrollbar-thumb:hover{background:#3A4757}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.section{padding:112px 0}
.section-tight{padding:84px 0}
.divider{height:1px;background:var(--line);border:0}

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:80;background:rgba(12,16,21,.92);
  border-bottom:1px solid transparent;transition:background .28s var(--ease),border-color .28s var(--ease);
}
.site-header.is-scrolled{background:rgba(7,9,12,.96);border-bottom-color:rgba(53,224,208,.45);box-shadow:0 0 26px -14px rgba(53,224,208,.6)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;filter:drop-shadow(0 0 8px rgba(53,224,208,.35))}
.brand-text{color:var(--text-hi);font-weight:700;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.nav-desktop{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:68px;padding:0 14px;
  font-size:15px;color:var(--text-mid);transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:16px;height:2px;border-radius:2px;
  background:var(--neon-1);transform:scaleX(0);transform-origin:left;transition:transform .28s var(--ease);
}
.nav-link:hover{color:var(--text-hi)}
.nav-link:hover::after{transform:scaleX(.55)}
.nav-link.is-active{color:var(--text-hi);text-shadow:0 0 14px rgba(53,224,208,.55)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:16px}
.nav-divider{width:1px;height:22px;background:var(--line-strong);display:inline-block}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:transparent;cursor:pointer;padding:0;position:relative;
}
.menu-toggle span{
  position:absolute;left:12px;right:12px;height:2px;background:var(--text-hi);border-radius:2px;
  transition:transform .26s var(--ease),opacity .2s var(--ease),top .26s var(--ease);
}
.menu-toggle span:nth-child(1){top:15px}
.menu-toggle span:nth-child(2){top:21px}
.menu-toggle span:nth-child(3){top:27px}
.menu-toggle.is-open span:nth-child(1){top:21px;transform:rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){top:21px;transform:rotate(-45deg)}

.mobile-drawer{
  position:fixed;inset:68px 0 0 0;background:var(--ink-900);z-index:79;
  transform:translateY(-12px);opacity:0;visibility:hidden;transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s;
  display:flex;flex-direction:column;padding:24px 20px 32px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible}
.drawer-link{
  display:flex;align-items:center;height:48px;padding-left:16px;border-left:3px solid transparent;
  color:var(--text-mid);font-size:16px;border-bottom:1px solid rgba(38,46,56,.7);
}
.drawer-link:hover{color:var(--text-hi)}
.drawer-link.is-active{color:var(--text-hi);border-left-color:var(--neon-1);background:rgba(53,224,208,.06)}
.drawer-cta{margin-top:24px;width:100%}

/* ============ 按钮 ============ */
.btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:10px;font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;overflow:hidden;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .12s var(--ease),box-shadow .26s var(--ease);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:52px;padding:0 30px;font-size:16px}
.btn-primary{background:var(--neon-1);color:#04120F;box-shadow:0 0 22px -10px rgba(53,224,208,.75)}
.btn-primary::after{
  content:"";position:absolute;top:-60%;left:-120%;width:60%;height:220%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent);
  transform:rotate(18deg);transition:left .45s var(--ease);
}
.btn-primary:hover{background:#5BEBDE;box-shadow:0 0 30px -8px rgba(53,224,208,.85)}
.btn-primary:hover::after{left:130%}
.btn-primary:active{transform:scale(.985)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-hi)}
.btn-ghost:hover{border-color:var(--neon-1);background:rgba(53,224,208,.08)}
.btn-ghost:active{transform:scale(.985)}
.btn-text{display:inline-flex;align-items:center;gap:8px;color:var(--neon-1);font-size:14.5px;font-weight:600;background:none;border:0;padding:0;cursor:pointer}
.btn-text .arrow{transition:transform .2s var(--ease);display:inline-block}
.btn-text:hover .arrow{transform:translateX(4px)}
.btn-block{width:100%}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.02em;border:1px solid rgba(53,224,208,.3);
  background:rgba(53,224,208,.12);color:var(--neon-1);
}
.badge-pink{border-color:rgba(255,61,129,.35);background:rgba(255,61,129,.12);color:var(--neon-2)}
.badge-mute{border-color:var(--line);background:rgba(255,255,255,.03);color:var(--text-lo)}
.eyebrow{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.eyebrow-line{width:24px;height:1px;background:var(--neon-1);box-shadow:0 0 10px rgba(53,224,208,.8)}
.eyebrow-text{font-size:13px;letter-spacing:.16em;color:var(--text-lo)}
.eyebrow-num{font-family:var(--font-mono);font-size:13px;color:var(--neon-1);letter-spacing:.08em}

/* ============ 面包屑 / 锚点条 ============ */
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-lo);flex-wrap:wrap}
.breadcrumb a{transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--neon-1)}
.breadcrumb .sep{color:#3B4553}
.breadcrumb .current{color:var(--text-mid)}
.anchor-bar{
  display:flex;gap:10px;overflow-x:auto;padding:14px 0 4px;scrollbar-width:none;
  border-top:1px solid var(--line);
}
.anchor-bar::-webkit-scrollbar{display:none}
.anchor-chip{
  flex:0 0 auto;display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:rgba(255,255,255,.02);font-size:13.5px;color:var(--text-mid);
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.anchor-chip:hover{border-color:rgba(53,224,208,.55);color:var(--text-hi);background:rgba(53,224,208,.07)}

/* ============ 页头主视觉 ============ */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:var(--ink-900)}
.page-hero-bg{
  position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;opacity:.5;
}
.page-hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(7,9,12,.96) 0%,rgba(7,9,12,.86) 42%,rgba(7,9,12,.3) 100%);
}
.page-hero-grid{
  position:absolute;inset:0;opacity:.25;
  background-image:linear-gradient(to right,rgba(53,224,208,.09) 1px,transparent 1px),
                   linear-gradient(to bottom,rgba(53,224,208,.09) 1px,transparent 1px);
  background-size:48px 48px;
}
.page-hero-inner{position:relative;z-index:2;padding:64px 0 44px;max-width:820px}
.page-hero h1{
  margin-top:20px;color:var(--text-hi);font-weight:800;letter-spacing:-.02em;
  font-size:clamp(2.1rem,4.6vw,3.4rem);line-height:1.14;
}
.page-hero .lead{margin-top:18px;font-size:17px;color:var(--text-mid);max-width:620px}
.hero-meta{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}

/* ============ 时间线 ============ */
.timeline{position:relative;margin-top:52px}
.timeline::before{
  content:"";position:absolute;left:21px;top:14px;bottom:34px;width:1px;
  background:linear-gradient(180deg,rgba(53,224,208,.7),rgba(53,224,208,.25) 62%,rgba(53,224,208,.05));
}
.tl-item{position:relative;display:grid;grid-template-columns:44px 1fr;gap:28px;padding-bottom:72px}
.tl-item:last-child{padding-bottom:0}
.tl-rail{display:flex;flex-direction:column;align-items:center;gap:14px}
.tl-dot{
  width:15px;height:15px;border-radius:50%;background:var(--ink-800);border:1px solid var(--neon-1);
  box-shadow:0 0 0 4px rgba(53,224,208,.08),0 0 16px rgba(53,224,208,.45);margin-top:6px;
}
.tl-item.is-key .tl-dot{background:var(--neon-1);box-shadow:0 0 0 5px rgba(53,224,208,.14),0 0 22px rgba(53,224,208,.7)}
.tl-num{font-family:var(--font-mono);font-size:13px;color:var(--neon-1);letter-spacing:.08em}
.tl-body h3{color:var(--text-hi);font-size:1.22rem;font-weight:600;line-height:1.5}
.tl-body p{margin-top:12px;font-size:16px;color:var(--text-mid);max-width:720px}
.tl-note{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-family:var(--font-mono);
  font-size:12.5px;color:var(--text-lo);letter-spacing:.04em;
}
.tl-note::before{content:"";width:16px;height:1px;background:var(--neon-2);display:inline-block}

/* ============ 卡片与图文 ============ */
.split{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:start}
.split.reverse{grid-template-columns:5fr 7fr}
.media-card{
  position:relative;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);
  background:var(--surface-1);box-shadow:var(--shadow-line);
}
.media-card img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .26s var(--ease)}
.media-card:hover img{transform:scale(1.04)}
.media-card .tag-float{
  position:absolute;top:14px;left:14px;display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;color:var(--text-hi);background:rgba(7,9,12,.72);
  border:1px solid rgba(53,224,208,.32);
}
.check-list{margin-top:24px;display:grid;gap:14px}
.check-list li{display:flex;gap:14px;align-items:flex-start;font-size:16px;color:var(--text-mid)}
.check-list .tick{
  flex:0 0 auto;width:20px;height:20px;margin-top:5px;border-radius:6px;border:1px solid rgba(53,224,208,.5);
  display:inline-flex;align-items:center;justify-content:center;background:rgba(53,224,208,.1);
}
.check-list .tick svg{width:11px;height:11px}

.panel{
  border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface-1);
  padding:26px;transition:box-shadow .26s var(--ease),border-color .26s var(--ease),transform .26s var(--ease);
}
.panel:hover{border-color:rgba(53,224,208,.4);box-shadow:var(--shadow-hover);transform:translateY(-4px)}
.panel h3{color:var(--text-hi);font-size:1.1rem;font-weight:600;line-height:1.5}
.panel p{margin-top:10px;font-size:15px;color:var(--text-mid)}
.panel-num{font-family:var(--font-mono);font-size:13px;color:var(--neon-2);letter-spacing:.08em}

.fault-row{
  display:grid;grid-template-columns:64px 1.1fr 1.6fr;gap:24px;align-items:baseline;
  padding:24px 0;border-bottom:1px solid var(--line);
}
.fault-row:first-of-type{border-top:1px solid var(--line)}
.fault-code{font-family:var(--font-mono);font-size:13px;color:var(--neon-3);letter-spacing:.08em}
.fault-row h3{color:var(--text-hi);font-size:1.05rem;font-weight:600;line-height:1.6}
.fault-row p{font-size:15.5px;color:var(--text-mid)}

/* ============ 窄 CTA 条 ============ */
.cta-strip{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  border:1px solid rgba(53,224,208,.45);border-radius:var(--r-md);background:var(--ink-700);
  padding:20px 26px;box-shadow:0 0 0 1px rgba(53,224,208,.08),0 0 34px -22px rgba(53,224,208,.9);
}
.cta-strip p{font-size:16px;color:var(--text-hi);font-weight:600}
.cta-strip span{display:block;margin-top:4px;font-size:13.5px;color:var(--text-lo);font-weight:400}

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-side{position:sticky;top:108px}
.faq-head h2{color:var(--text-hi);font-size:clamp(1.6rem,2.8vw,2.35rem);font-weight:700;line-height:1.2}
.faq-head p{margin-top:16px;font-size:15.5px;color:var(--text-mid);max-width:340px}
.faq-list{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;text-align:left;
  background:none;border:0;cursor:pointer;padding:22px 0;color:var(--text-hi);
  font-size:17px;font-weight:600;line-height:1.55;transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--neon-1)}
.faq-item.is-open .faq-q{color:var(--neon-1)}
.faq-icon{
  flex:0 0 auto;font-family:var(--font-mono);font-size:20px;color:var(--text-lo);line-height:1;
  transition:transform .32s var(--ease),color .2s var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--neon-1)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-a p{padding:0 0 24px;font-size:15px;line-height:1.85;color:var(--text-mid);max-width:660px}

/* ============ 表单 / CTA ============ */
.apply-wrap{
  position:relative;border:1px solid rgba(53,224,208,.4);border-radius:var(--r-lg);background:var(--ink-700);
  overflow:hidden;box-shadow:0 0 0 1px rgba(53,224,208,.06),0 30px 70px -50px rgba(53,224,208,.9);
}
.apply-grid-bg{
  position:absolute;inset:0;opacity:.35;pointer-events:none;
  background-image:linear-gradient(to right,rgba(53,224,208,.07) 1px,transparent 1px),
                   linear-gradient(to bottom,rgba(53,224,208,.07) 1px,transparent 1px);
  background-size:48px 48px;
}
.apply-inner{position:relative;z-index:2;display:grid;grid-template-columns:6fr 6fr;gap:48px;padding:44px}
.apply-inner h2{color:var(--text-hi);font-size:clamp(1.6rem,2.8vw,2.2rem);font-weight:700;line-height:1.22}
.apply-inner .desc{margin-top:16px;font-size:15.5px;color:var(--text-mid);max-width:420px}
.apply-points{margin-top:28px;display:grid;gap:16px}
.apply-points li{display:flex;gap:14px;align-items:flex-start;font-size:15.5px;color:var(--text-mid)}
.apply-points .dot{flex:0 0 auto;width:6px;height:6px;border-radius:50%;background:var(--neon-1);margin-top:11px;box-shadow:0 0 10px rgba(53,224,208,.8)}
.form-card{border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface-1);padding:28px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--text-lo);margin-bottom:8px;letter-spacing:.02em}
.field input,.field select{
  width:100%;height:48px;border-radius:10px;border:1px solid var(--line);background:var(--surface-2);
  padding:0 14px;font-size:15px;color:var(--text-hi);transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field input::placeholder{color:var(--text-lo)}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--neon-1);box-shadow:0 0 0 3px rgba(53,224,208,.16);
}
.field.has-error input,.field.has-error select{border-color:var(--neon-2);box-shadow:0 0 0 3px rgba(255,61,129,.14)}
.field .err{display:none;margin-top:8px;font-size:12px;color:var(--neon-2)}
.field.has-error .err{display:block}
.form-foot{margin-top:14px;font-size:12px;color:var(--text-lo);line-height:1.7}
.form-ok{
  display:none;margin-top:14px;padding:12px 14px;border-radius:10px;font-size:13.5px;
  border:1px solid rgba(53,224,208,.4);background:rgba(53,224,208,.08);color:var(--neon-1);
}
.form-ok.show{display:block}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px}
.footer-brand p{margin-top:18px;font-size:14.5px;color:var(--text-lo);line-height:1.85;max-width:300px}
.footer-contact{margin-top:18px;font-size:13.5px;color:var(--text-lo);line-height:1.9;font-family:var(--font-mono)}
.footer-title{color:var(--text-hi);font-size:14px;font-weight:600;letter-spacing:.04em;margin-bottom:18px}
.footer-list li{margin-bottom:11px}
.footer-list a{font-size:14.5px;color:var(--text-mid);transition:color .18s var(--ease)}
.footer-list a:hover{color:var(--neon-1)}
.footer-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:48px;padding-top:26px;border-top:1px solid var(--line)}
.footer-tags a{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);
  border:1px solid var(--line);font-size:13px;color:var(--text-mid);transition:border-color .2s var(--ease),color .2s var(--ease);
}
.footer-tags a:hover{border-color:rgba(53,224,208,.5);color:var(--text-hi)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;margin-top:26px;padding-top:22px;
  border-top:1px solid var(--line);font-size:13px;color:var(--text-lo);
}
.to-top{
  position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line-strong);background:rgba(7,9,12,.9);color:var(--neon-1);cursor:pointer;
  display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;z-index:70;
  transition:opacity .26s var(--ease),visibility .26s,border-color .2s var(--ease),transform .2s var(--ease);
}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{border-color:var(--neon-1);transform:translateY(-3px)}

/* ============ 入场动画 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
.page-hero h1.reveal{transform:translateY(22px)}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1 !important;transform:none !important}
  html{scroll-behavior:auto}
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .split,.split.reverse{grid-template-columns:1fr;gap:36px}
  .faq-layout{grid-template-columns:1fr;gap:36px}
  .faq-side{position:static}
}
@media (max-width:1023px){
  .nav-desktop,.nav-divider{display:none}
  .menu-toggle{display:inline-block}
  .container{padding:0 24px}
  .section{padding:88px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .apply-inner{grid-template-columns:1fr;gap:32px;padding:32px}
}
@media (max-width:767px){
  body{font-size:16px;line-height:1.85}
  .container{padding:0 20px}
  .section{padding:64px 0}
  .section-tight{padding:56px 0}
  .page-hero-inner{padding:44px 0 32px}
  .page-hero-bg::after{background:linear-gradient(180deg,rgba(7,9,12,.94) 0%,rgba(7,9,12,.72) 60%,rgba(7,9,12,.94) 100%)}
  .timeline::before{left:15px}
  .tl-item{grid-template-columns:32px 1fr;gap:16px;padding-bottom:48px}
  .tl-dot{width:13px;height:13px}
  .tl-num{font-size:12px}
  .fault-row{grid-template-columns:1fr;gap:8px;padding:20px 0}
  .cta-strip{flex-direction:column;align-items:stretch;text-align:left;padding:20px}
  .cta-strip .btn{width:100%}
  .btn-lg,.btn{padding:0 20px}
  .apply-inner{padding:24px}
  .form-card{padding:22px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:10px}
  .nav-actions .btn-sm{display:none}
  .to-top{right:16px;bottom:16px}
}

/* roulang page: category4 */
:root{
    --ink-900:#07090C;
    --ink-800:#0C1015;
    --ink-700:#12171E;
    --surface-1:#161C24;
    --surface-2:#1D242D;
    --line:#262E38;
    --line-strong:#333D49;
    --text-hi:#F2F5F8;
    --text-mid:#A9B4C0;
    --text-lo:#6C7885;
    --neon-1:#35E0D0;
    --neon-2:#FF3D81;
    --neon-3:#FFB454;
    --r-sm:8px;
    --r-md:14px;
    --r-lg:20px;
    --r-pill:999px;
    --ease:cubic-bezier(.22,.61,.36,1);
    --font-sans:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
    --font-mono:"JetBrains Mono","SF Mono",Consolas,monospace;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  .site-body{
    margin:0;
    background:var(--ink-800);
    color:var(--text-mid);
    font-family:var(--font-sans);
    font-size:16.5px;
    line-height:1.88;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  .site-body img{max-width:100%;display:block;}
  .site-body a{color:inherit;text-decoration:none;}
  .site-body button{font-family:inherit;}
  .site-body h1,.site-body h2,.site-body h3,.site-body p,.site-body ul,.site-body ol{margin:0;}
  .site-body ul,.site-body ol{padding:0;list-style:none;}
  body .container{
    width:100%;
    max-width:1240px;
    margin:0 auto;
    padding:0 32px;
  }
  :focus-visible{outline:2px solid var(--neon-1);outline-offset:2px;}
  .skip-link{
    position:absolute;left:-9999px;top:0;z-index:200;
    background:var(--neon-1);color:#04120F;padding:10px 18px;border-radius:0 0 10px 0;font-size:14px;
  }
  .skip-link:focus{left:0;}

  /* ===== 顶栏 ===== */
  .site-header{
    position:sticky;top:0;z-index:70;
    background:rgba(12,16,21,.9);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    transition:border-color .26s var(--ease),box-shadow .26s var(--ease),background .26s var(--ease);
  }
  .site-header.is-scrolled{
    border-bottom-color:rgba(53,224,208,.45);
    box-shadow:0 1px 0 rgba(53,224,208,.28),0 14px 34px -26px rgba(0,0,0,.95);
    background:rgba(9,12,17,.96);
  }
  .nav-inner{
    display:flex;align-items:center;justify-content:space-between;gap:24px;
    height:68px;
  }
  .brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-hi);font-weight:700;font-size:17px;letter-spacing:.01em;}
  .brand-mark{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9px;background:rgba(53,224,208,.08);border:1px solid rgba(53,224,208,.28);}
  .brand-text{white-space:nowrap;}
  .nav-desktop{display:flex;align-items:center;gap:4px;}
  .nav-link{
    position:relative;padding:9px 13px;border-radius:8px;
    font-size:15px;color:var(--text-mid);
    transition:color .18s var(--ease),background .18s var(--ease);
  }
  .nav-link:hover{color:var(--text-hi);background:rgba(255,255,255,.03);}
  .nav-link.is-active{color:var(--text-hi);text-shadow:0 0 14px rgba(53,224,208,.55);}
  .nav-link.is-active::after{
    content:"";position:absolute;left:13px;right:13px;bottom:-1px;height:2px;border-radius:2px;
    background:var(--neon-1);box-shadow:0 0 10px rgba(53,224,208,.85);
  }
  .nav-actions{display:flex;align-items:center;gap:14px;}
  .nav-divider{width:1px;height:24px;background:var(--line-strong);display:block;}
  .menu-toggle{
    display:none;width:44px;height:44px;padding:0;background:transparent;
    border:1px solid var(--line-strong);border-radius:10px;cursor:pointer;
    flex-direction:column;align-items:center;justify-content:center;gap:5px;
    transition:border-color .18s var(--ease),background .18s var(--ease);
  }
  .menu-toggle span{display:block;width:18px;height:1.6px;background:var(--text-hi);border-radius:2px;transition:transform .26s var(--ease),opacity .26s var(--ease);}
  .menu-toggle:hover{border-color:var(--neon-1);background:rgba(53,224,208,.08);}

  /* ===== 按钮 ===== */
  .btn{
    position:relative;overflow:hidden;
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:10px;border:1px solid transparent;
    font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
    transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .26s var(--ease);
  }
  .btn-primary{background:var(--neon-1);color:#04120F;}
  .btn-primary:hover{box-shadow:0 0 0 1px rgba(53,224,208,.6),0 16px 34px -22px rgba(53,224,208,.9);}
  .btn-primary::after{
    content:"";position:absolute;top:0;left:-70%;width:42%;height:100%;
    background:linear-gradient(100deg,transparent,rgba(255,255,255,.5),transparent);
    transform:skewX(-18deg);transition:left .45s var(--ease);
  }
  .btn-primary:hover::after{left:135%;}
  .btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-hi);}
  .btn-ghost:hover{border-color:var(--neon-1);background:rgba(53,224,208,.08);}
  .btn:active{transform:scale(.985);}
  .btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:9px;}
  .btn-lg{height:52px;padding:0 28px;font-size:16px;}

  /* ===== 抽屉 ===== */
  .drawer{
    position:fixed;inset:0;z-index:120;
    background:var(--ink-900);
    display:flex;flex-direction:column;
    padding:20px;
    transform:translateX(102%);
    transition:transform .32s var(--ease);
    visibility:hidden;
  }
  .drawer.is-open{transform:translateX(0);visibility:visible;}
  .drawer-top{display:flex;align-items:center;justify-content:space-between;height:52px;border-bottom:1px solid var(--line);padding-bottom:14px;}
  .drawer-close{
    width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
    background:transparent;border:1px solid var(--line-strong);border-radius:10px;color:var(--text-hi);cursor:pointer;
  }
  .drawer-close:hover{border-color:var(--neon-1);color:var(--neon-1);}
  .drawer-nav{display:flex;flex-direction:column;margin-top:18px;}
  .drawer-nav a{
    display:flex;align-items:center;height:48px;padding-left:14px;
    border-left:3px solid transparent;color:var(--text-mid);font-size:16px;
    transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
  }
  .drawer-nav a:hover{color:var(--text-hi);background:rgba(255,255,255,.03);}
  .drawer-nav a.is-active{color:var(--text-hi);border-left-color:var(--neon-1);}
  .drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);}
  .drawer-foot .btn{width:100%;}

  /* ===== 通用板块 ===== */
  .section{padding:110px 0;}
  .section-tight{padding:56px 0;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:12px;
    font-family:var(--font-mono);font-size:13px;letter-spacing:.14em;
    color:var(--neon-1);
  }
  .eyebrow::after{content:"";width:24px;height:1px;background:var(--neon-1);box-shadow:0 0 8px rgba(53,224,208,.8);}
  .h1{
    font-size:clamp(2.3rem,5.2vw,3.6rem);
    line-height:1.08;font-weight:800;letter-spacing:-.02em;color:var(--text-hi);
  }
  .h2{
    font-size:clamp(1.6rem,2.8vw,2.35rem);
    line-height:1.18;font-weight:700;letter-spacing:-.01em;color:var(--text-hi);
  }
  .h3{font-size:1.2rem;line-height:1.45;font-weight:600;color:var(--text-hi);}
  .lead{max-width:560px;font-size:16.5px;line-height:1.88;color:var(--text-mid);}
  .section-head{max-width:720px;margin-bottom:46px;}
  .section-head .h2{margin-top:16px;}
  .section-head .lead{margin-top:16px;}
  .divider-top{border-top:1px solid var(--line);}

  /* ===== 标签 ===== */
  .tag{
    display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:var(--r-pill);
    font-size:12px;letter-spacing:.03em;
    background:rgba(53,224,208,.12);color:var(--neon-1);
    border:1px solid rgba(53,224,208,.3);
  }
  .tag-hot{background:rgba(255,61,129,.12);color:var(--neon-2);border-color:rgba(255,61,129,.32);}

  /* ===== 页头 ===== */
  .page-hero{
    position:relative;overflow:hidden;
    min-height:340px;display:flex;align-items:flex-end;
    padding:64px 0 48px;
    border-bottom:1px solid var(--line);
    background:var(--ink-900);
  }
  .page-hero-media{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.75;}
  .page-hero-shade{
    position:absolute;inset:0;
    background:linear-gradient(90deg,rgba(7,9,12,.94) 0%,rgba(7,9,12,.74) 46%,rgba(7,9,12,.25) 100%);
  }
  .page-hero-inner{position:relative;z-index:2;width:100%;}
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-lo);margin-bottom:20px;}
  .breadcrumb a{color:var(--text-lo);transition:color .18s var(--ease);}
  .breadcrumb a:hover{color:var(--neon-1);}
  .breadcrumb .sep{color:var(--line-strong);}
  .breadcrumb .current{color:var(--text-mid);max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .page-sub{margin-top:16px;max-width:560px;font-size:17px;color:var(--text-mid);}
  .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}

  /* ===== 锚点条 ===== */
  .anchor-bar{
    display:flex;gap:10px;overflow-x:auto;padding:16px 0;
    border-bottom:1px solid var(--line);
    scrollbar-width:none;
  }
  .anchor-bar::-webkit-scrollbar{display:none;}
  .anchor-chip{
    flex:0 0 auto;display:inline-flex;align-items:center;height:36px;padding:0 16px;
    border-radius:var(--r-pill);border:1px solid var(--line-strong);
    font-size:13.5px;color:var(--text-mid);white-space:nowrap;
    transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
  }
  .anchor-chip:hover{color:var(--text-hi);border-color:var(--neon-1);background:rgba(53,224,208,.08);}

  /* ===== 窄 CTA 条 ===== */
  .strip-cta{
    display:flex;align-items:center;justify-content:space-between;gap:24px;
    padding:20px 26px;border:1px solid var(--line-strong);border-radius:var(--r-md);
    background:linear-gradient(90deg,rgba(53,224,208,.09),rgba(53,224,208,0) 62%);
  }
  .strip-cta p{font-size:15.5px;color:var(--text-mid);max-width:660px;}
  .strip-cta strong{color:var(--text-hi);font-weight:600;}

  /* ===== Bento 资源网格 ===== */
  .bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:stretch;}
  .res-card{
    grid-column:span 3;
    display:flex;flex-direction:column;justify-content:space-between;gap:16px;
    min-height:266px;padding:26px;
    border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface-1);
    transition:transform .26s var(--ease),border-color .26s var(--ease),box-shadow .26s var(--ease),background .26s var(--ease);
  }
  .res-card:hover{
    transform:translateY(-4px);
    border-color:rgba(53,224,208,.45);
    background:var(--surface-2);
    box-shadow:0 0 0 1px rgba(53,224,208,.4),0 18px 44px -22px rgba(0,0,0,.9),0 0 26px -12px rgba(53,224,208,.55);
  }
  .res-card-lg{grid-column:span 6;min-height:420px;}
  .res-top{display:flex;align-items:center;justify-content:space-between;gap:12px;}
  .res-icon{
    display:inline-flex;align-items:center;justify-content:center;
    width:40px;height:40px;border-radius:11px;
    border:1px solid rgba(53,224,208,.28);background:rgba(53,224,208,.07);color:var(--neon-1);
  }
  .idx{font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;color:var(--neon-1);}
  .res-title{font-size:1.18rem;font-weight:600;line-height:1.45;color:var(--text-hi);}
  .res-desc{font-size:14.5px;line-height:1.8;color:var(--text-mid);}
  .res-link{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13.5px;color:var(--neon-1);
    padding-top:14px;border-top:1px solid var(--line);
    transition:color .18s var(--ease);
  }
  .res-link svg{transition:transform .18s var(--ease);}
  .res-card:hover .res-link svg{transform:translateX(4px);}
  .res-media{
    position:relative;overflow:hidden;border-radius:var(--r-md);
    border:1px solid var(--line);aspect-ratio:16/9;
  }
  .res-media img{width:100%;height:100%;object-fit:cover;transition:transform .26s var(--ease);}
  .res-media::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(90deg,rgba(7,9,12,.86),rgba(7,9,12,.22));
  }
  .res-card-lg:hover .res-media img{transform:scale(1.04);}
  .res-corner{
    position:absolute;left:14px;top:14px;z-index:2;
    display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:var(--r-pill);
    font-size:12px;color:var(--text-hi);background:rgba(7,9,12,.72);border:1px solid rgba(53,224,208,.4);
  }

  /* ===== 自查清单 ===== */
  .checklist{border-top:1px solid var(--line);}
  .check-item{
    display:grid;grid-template-columns:72px 1fr auto;gap:22px;align-items:center;
    padding:24px 0;border-bottom:1px solid var(--line);
  }
  .check-item .num{font-family:var(--font-mono);font-size:15px;color:var(--neon-1);letter-spacing:.08em;}
  .check-item h3{font-size:1.05rem;font-weight:600;color:var(--text-hi);margin-bottom:6px;}
  .check-item p{font-size:14.5px;line-height:1.78;color:var(--text-mid);}
  .check-flag{
    font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
    color:var(--text-lo);border:1px solid var(--line-strong);border-radius:var(--r-pill);
    padding:5px 12px;white-space:nowrap;
  }
  .check-flag.is-key{color:var(--neon-3);border-color:rgba(255,180,84,.36);}

  /* ===== 异常处置 ===== */
  .incident-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
  .incident-side{grid-column:span 4;}
  .incident-side-inner{position:sticky;top:104px;}
  .incident-main{grid-column:span 8;position:relative;padding-left:28px;}
  .incident-main::before{content:"";position:absolute;left:5px;top:8px;bottom:8px;width:1px;background:linear-gradient(180deg,rgba(53,224,208,.65),rgba(53,224,208,.06));}
  .incident-node{position:relative;padding:0 0 44px 0;}
  .incident-node:last-child{padding-bottom:0;}
  .incident-node::before{
    content:"";position:absolute;left:-28px;top:7px;width:11px;height:11px;border-radius:50%;
    background:var(--ink-800);border:2px solid var(--neon-1);box-shadow:0 0 12px rgba(53,224,208,.75);
  }
  .incident-node .step{font-family:var(--font-mono);font-size:13px;color:var(--text-lo);letter-spacing:.1em;margin-bottom:8px;}
  .incident-node h3{font-size:1.15rem;font-weight:600;color:var(--text-hi);margin-bottom:8px;}
  .incident-node p{font-size:15px;line-height:1.85;color:var(--text-mid);max-width:560px;}

  /* ===== FAQ ===== */
  .faq-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
  .faq-side{grid-column:span 4;}
  .faq-side-inner{position:sticky;top:104px;}
  .faq-side .h2{margin:16px 0 14px;}
  .faq-main{grid-column:span 8;}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-item:first-child{border-top:1px solid var(--line);}
  .faq-q{
    width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
    padding:22px 0;background:none;border:0;text-align:left;cursor:pointer;
    font-size:17px;font-weight:600;line-height:1.6;color:var(--text-hi);
    transition:color .2s var(--ease);
  }
  .faq-q:hover{color:var(--neon-1);}
  .faq-icon{position:relative;flex:0 0 20px;height:20px;margin-top:4px;}
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;background:var(--text-mid);
    transition:transform .32s var(--ease),background .32s var(--ease),opacity .32s var(--ease);
  }
  .faq-icon::before{left:0;top:9px;width:20px;height:1.6px;}
  .faq-icon::after{left:9px;top:0;width:1.6px;height:20px;}
  .faq-item.is-open .faq-q{color:var(--neon-1);}
  .faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0;}
  .faq-item.is-open .faq-icon::before{background:var(--neon-1);}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
  .faq-a-inner{padding:0 40px 22px 0;font-size:15px;line-height:1.85;color:var(--text-mid);}

  /* ===== 结尾 CTA ===== */
  .cta-panel{
    position:relative;overflow:hidden;
    border:1px solid rgba(53,224,208,.35);border-radius:var(--r-lg);
    background:var(--ink-700);
    padding:52px;
    box-shadow:0 0 46px -24px rgba(53,224,208,.7);
  }
  .cta-panel::before{
    content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
    background-image:linear-gradient(rgba(53,224,208,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(53,224,208,.07) 1px,transparent 1px);
    background-size:48px 48px;
  }
  .cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:repeat(12,1fr);gap:44px;}
  .cta-left{grid-column:span 6;}
  .cta-right{grid-column:span 6;}
  .cta-list{margin-top:26px;display:flex;flex-direction:column;gap:14px;}
  .cta-list li{display:flex;align-items:flex-start;gap:12px;font-size:15px;line-height:1.75;color:var(--text-mid);}
  .cta-list svg{flex:0 0 18px;margin-top:5px;color:var(--neon-1);}
  .field{margin-bottom:18px;}
  .field label{display:block;font-size:13px;color:var(--text-mid);margin-bottom:8px;letter-spacing:.02em;}
  .field input,.field select{
    width:100%;height:48px;padding:0 14px;
    background:var(--surface-2);border:1px solid var(--line-strong);border-radius:10px;
    color:var(--text-hi);font-size:15px;font-family:inherit;
    transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
  }
  .field input::placeholder{color:var(--text-lo);}
  .field input:focus,.field select:focus{
    outline:none;border-color:var(--neon-1);
    box-shadow:0 0 0 3px rgba(53,224,208,.16);
  }
  .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 18px;}
  .form-grid .field-full{grid-column:1 / -1;}
  .form-tip{margin-top:14px;font-size:13px;color:var(--neon-1);min-height:20px;}
  .form-note{margin-top:12px;font-size:12px;color:var(--text-lo);line-height:1.7;}

  /* ===== 页脚 ===== */
  .site-footer{
    background:var(--ink-900);
    border-top:1px solid var(--line);
    padding:72px 0 32px;
    margin-top:0;
  }
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
  .footer-brand .brand{margin-bottom:16px;}
  .footer-brand p{font-size:14.5px;line-height:1.85;color:var(--text-mid);max-width:340px;}
  .footer-contact{margin-top:18px;font-size:13.5px;line-height:1.9;color:var(--text-lo);font-family:var(--font-mono);}
  .footer-title{font-size:14px;font-weight:600;color:var(--text-hi);margin-bottom:16px;letter-spacing:.02em;}
  .footer-list li{margin-bottom:11px;}
  .footer-list a{font-size:14.5px;color:var(--text-mid);transition:color .18s var(--ease);}
  .footer-list a:hover{color:var(--neon-1);}
  .footer-tags{
    display:flex;flex-wrap:wrap;gap:10px;
    margin-top:52px;padding-top:26px;border-top:1px solid var(--line);
  }
  .footer-tags a{
    display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--r-pill);
    font-size:13px;color:var(--text-mid);border:1px solid var(--line);
    transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
  }
  .footer-tags a:hover{color:var(--text-hi);border-color:rgba(53,224,208,.5);background:rgba(53,224,208,.07);}
  .footer-bottom{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
    margin-top:24px;padding-top:22px;border-top:1px solid var(--line);
    font-size:13px;color:var(--text-lo);
  }

  /* ===== 返回顶部 ===== */
  .to-top{
    position:fixed;right:24px;bottom:24px;z-index:90;
    width:46px;height:46px;border-radius:50%;
    display:inline-flex;align-items:center;justify-content:center;
    background:var(--ink-700);border:1px solid var(--line-strong);color:var(--text-hi);
    cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);
    transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
  }
  .to-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
  .to-top:hover{border-color:var(--neon-1);color:var(--neon-1);}

  /* ===== 响应式 ===== */
  @media (max-width:1279px){
    .res-card{grid-column:span 6;}
  }
  @media (max-width:1023px){
    body .container{padding:0 24px;}
    .nav-desktop,.nav-divider{display:none;}
    .menu-toggle{display:inline-flex;}
    .section{padding:88px 0;}
    .res-card-lg{grid-column:span 12;}
    .res-card{grid-column:span 6;}
    .incident-grid,.faq-grid{display:block;}
    .incident-side{margin-bottom:36px;}
    .incident-side-inner,.faq-side-inner{position:static;}
    .faq-side{margin-bottom:28px;}
    .cta-inner{grid-template-columns:1fr;gap:36px;}
    .cta-left,.cta-right{grid-column:auto;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  }
  @media (max-width:767px){
    body .container{padding:0 20px;}
    .site-body{font-size:16px;line-height:1.85;}
    .section{padding:64px 0;}
    .section-tight{padding:40px 0;}
    .page-hero{min-height:300px;padding:44px 0 36px;}
    .page-hero-shade{background:linear-gradient(180deg,rgba(7,9,12,.72) 0%,rgba(7,9,12,.92) 78%);}
    .res-card,.res-card-lg{grid-column:span 12;min-height:0;}
    .check-item{grid-template-columns:56px 1fr;gap:16px;}
    .check-flag{grid-column:2;justify-self:start;}
    .strip-cta{flex-direction:column;align-items:stretch;gap:18px;padding:20px;}
    .strip-cta .btn{width:100%;}
    .cta-panel{padding:28px 22px;}
    .form-grid{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr;gap:32px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
    .btn{width:100%;}
    .nav-actions .btn{width:auto;}
    .faq-a-inner{padding-right:0;}
    .to-top{right:16px;bottom:16px;}
  }
  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{
      animation-duration:.001ms !important;
      animation-iteration-count:1 !important;
      transition-duration:.001ms !important;
      scroll-behavior:auto !important;
    }
  }