/* roulang page: index */
:root{
    --ink-950:#0E0A1B;
    --ink-900:#15102A;
    --ink-800:#1E1738;
    --line:#2E2650;
    --brand-500:#2BE3C4;
    --brand-600:#14BFA4;
    --accent-500:#FF7A45;
    --violet-500:#7C5CFF;
    --text-100:#F2F0FA;
    --text-300:#B9B2D6;
    --text-500:#7E769E;
    --paper:#FBFAFF;
    --radius-lg:16px;
    --radius-md:12px;
    --radius-sm:10px;
    --ease:cubic-bezier(.2,.7,.3,1);
    --shadow-card:0 0 0 1px rgba(43,227,196,.10), 0 24px 48px -22px rgba(0,0,0,.8);
    --shadow-card-hover:0 0 0 1px rgba(43,227,196,.35), 0 28px 56px -22px rgba(0,0,0,.85);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--ink-950);
    color:var(--text-100);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
    font-size:15px;
    line-height:1.85;
    font-weight:400;
    -webkit-font-smoothing:antialiased;
    background-image:
      linear-gradient(rgba(46,38,80,.35) 1px, transparent 1px),
      linear-gradient(90deg, rgba(46,38,80,.35) 1px, transparent 1px);
    background-size:64px 64px;
    background-position:-1px -1px;
  }
  img{display:block;max-width:100%;height:auto;}
  a{color:var(--brand-500);text-decoration:none;transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);}
  a:hover{color:#6BF2DA;}
  button,input,textarea,select{font:inherit;color:inherit;}
  h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:0;}
  p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  :focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}

  .shell{display:block;}
  .main{margin-left:240px;min-height:100vh;display:flex;flex-direction:column;}
  .container{width:100%;max-width:1280px;margin:0 auto;padding:0 40px;}

  /* ---------- 侧栏 ---------- */
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;width:240px;
    background:var(--ink-900);
    border-right:1px solid var(--line);
    padding:24px 18px;
    display:flex;flex-direction:column;gap:22px;
    overflow-y:auto;z-index:60;
  }
  .logo{display:flex;align-items:center;gap:12px;color:var(--text-100);}
  .logo:hover{color:var(--text-100);}
  .logo-mark{
    flex:0 0 auto;width:42px;height:42px;border-radius:12px;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(140deg,var(--brand-500),var(--violet-500));
    color:#0B0817;font-weight:800;font-size:17px;letter-spacing:.5px;
  }
  .logo-text{display:flex;flex-direction:column;line-height:1.3;min-width:0;}
  .logo-text strong{font-size:15px;font-weight:700;color:var(--text-100);}
  .logo-text small{font-size:12px;color:var(--text-500);white-space:nowrap;}

  .nav{display:flex;flex-direction:column;gap:6px;}
  .nav-title{font-size:12px;color:var(--text-500);padding:0 16px 6px;}
  .nav-item{
    position:relative;display:flex;align-items:center;gap:10px;
    height:44px;padding:0 16px;border-radius:var(--radius-sm);
    color:var(--text-300);font-size:14px;font-weight:500;
  }
  .nav-item:hover{background:rgba(43,227,196,.08);color:var(--text-100);}
  .nav-item.active{background:rgba(43,227,196,.12);color:var(--brand-500);font-weight:600;}
  .nav-item.active::before{
    content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:3px;
    background:var(--brand-500);
  }
  .nav-abbr{display:none;font-size:13px;font-weight:700;width:100%;text-align:center;}

  .sidebar-cta{
    display:flex;align-items:center;justify-content:center;gap:8px;
    height:46px;border-radius:var(--radius-sm);
    background:var(--accent-500);color:#22100A;font-weight:700;font-size:14px;
    box-shadow:0 0 0 1px rgba(255,122,69,.5), 0 14px 30px -14px rgba(255,122,69,.75);
  }
  .sidebar-cta:hover{background:#FF8E5F;color:#22100A;box-shadow:0 0 0 1px rgba(255,122,69,.7), 0 0 22px rgba(255,122,69,.45);}
  .sidebar-cta:active{transform:scale(.98);}

  .sidebar-divider{height:1px;background:var(--line);margin:2px 0;}
  .sidebar-minor{display:flex;flex-direction:column;gap:4px;}
  .sidebar-minor a{display:block;padding:8px 16px;font-size:13px;color:var(--text-500);border-radius:8px;}
  .sidebar-minor a:hover{color:var(--text-100);background:rgba(255,255,255,.04);}
  .sidebar-foot{margin-top:auto;font-size:12px;color:var(--text-500);line-height:1.7;padding:0 6px;}

  /* ---------- 顶栏（移动端） ---------- */
  .topbar{
    display:none;position:sticky;top:0;z-index:70;
    align-items:center;justify-content:space-between;gap:12px;
    height:56px;padding:0 16px;
    background:rgba(21,16,42,.94);
    border-bottom:1px solid var(--line);
    backdrop-filter:blur(8px);
  }
  .topbar .brand{display:flex;align-items:center;gap:10px;color:var(--text-100);font-weight:700;font-size:14px;}
  .topbar .brand .logo-mark{width:32px;height:32px;border-radius:9px;font-size:13px;}
  .menu-btn{
    width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
    background:var(--ink-800);color:var(--text-100);display:flex;align-items:center;justify-content:center;
    cursor:pointer;
  }
  .menu-btn:hover{border-color:var(--brand-500);color:var(--brand-500);}
  .menu-btn:active{transform:scale(.97);}
  .scrim{
    position:fixed;inset:0;background:rgba(6,4,14,.66);z-index:55;
    opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s var(--ease);
  }
  .scrim.show{opacity:1;visibility:visible;}

  /* ---------- 通用 ---------- */
  .section{padding:64px 0;}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
  .section-head h2{font-size:28px;font-weight:800;color:var(--text-100);}
  .section-head p{margin-top:10px;color:var(--text-300);font-size:15px;max-width:680px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;color:var(--brand-500);font-weight:600;
    padding:6px 14px;border-radius:999px;
    background:rgba(43,227,196,.10);
  }
  .badge{
    display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
    font-size:12px;font-weight:600;line-height:1;
  }
  .badge-brand{background:rgba(43,227,196,.14);color:#7CF2DC;}
  .badge-violet{background:rgba(124,92,255,.18);color:#B7A4FF;}
  .badge-accent{background:rgba(255,122,69,.16);color:#FFA87D;}

  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:all .2s var(--ease);}
  .btn-primary{background:var(--accent-500);color:#22100A;box-shadow:0 0 0 1px rgba(255,122,69,.45), 0 16px 32px -16px rgba(255,122,69,.8);}
  .btn-primary:hover{background:#FF8E5F;color:#22100A;box-shadow:0 0 0 1px rgba(255,122,69,.7), 0 0 24px rgba(255,122,69,.45);}
  .btn-primary:active{transform:scale(.98);}
  .btn-ghost{background:transparent;color:var(--brand-500);border-color:rgba(43,227,196,.45);}
  .btn-ghost:hover{background:rgba(43,227,196,.10);color:#7CF2DC;border-color:var(--brand-500);}
  .btn-ghost:active{transform:scale(.98);}
  .link-more{position:relative;font-size:14px;font-weight:600;color:var(--brand-500);padding-bottom:2px;}
  .link-more::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand-500);transition:width .25s var(--ease);}
  .link-more:hover::after{width:100%;}

  .card{
    background:var(--ink-900);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-card);
    padding:22px;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);}

  /* ---------- Hero ---------- */
  .hero{padding:56px 0 40px;}
  .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;min-height:480px;}
  .hero h1{font-size:42px;line-height:1.15;font-weight:800;margin-top:18px;}
  .hero h1 em{font-style:normal;color:var(--brand-500);}
  .hero-sub{margin-top:18px;font-size:16px;color:var(--text-300);max-width:560px;}
  .hero-actions{display:flex;align-items:center;gap:22px;margin-top:30px;flex-wrap:wrap;}
  .hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
  .hero-points span{font-size:13px;color:var(--text-300);border:1px solid var(--line);border-radius:999px;padding:6px 14px;}
  .hero-visual{position:relative;border-radius:20px;overflow:hidden;aspect-ratio:16/10;box-shadow:var(--shadow-card);}
  .hero-visual img{width:100%;height:100%;object-fit:cover;opacity:.92;}
  .hero-visual::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(150deg, rgba(14,10,27,.9) 6%, rgba(14,10,27,.35) 58%, rgba(43,227,196,.22) 100%);
  }
  .hero-visual .grid-overlay{
    position:absolute;inset:0;z-index:2;pointer-events:none;
    background-image:linear-gradient(rgba(240,250,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(240,250,255,.06) 1px,transparent 1px);
    background-size:40px 40px;
  }
  .hero-visual .visual-tag{
    position:absolute;left:20px;bottom:20px;z-index:3;
    background:rgba(14,10,27,.82);border:1px solid rgba(43,227,196,.35);
    border-radius:12px;padding:12px 16px;font-size:13px;color:var(--text-300);
    backdrop-filter:blur(4px);
  }
  .hero-visual .visual-tag b{display:block;color:var(--text-100);font-size:15px;font-weight:700;margin-bottom:2px;}

  /* ---------- 数据条 ---------- */
  .stats{background:var(--ink-900);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
  .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);}
  .stat{padding:28px 24px;border-right:1px solid var(--line);}
  .stat:last-child{border-right:none;}
  .stat b{display:block;font-size:32px;font-weight:800;color:var(--brand-500);line-height:1.1;}
  .stat b i{font-style:normal;font-size:16px;color:var(--text-300);margin-left:4px;}
  .stat span{display:block;margin-top:8px;font-size:13px;color:var(--text-500);}

  /* ---------- 通道能力 ---------- */
  .feature-block{display:grid;grid-template-columns:120px 1fr;gap:32px;padding:36px 0;border-top:1px solid var(--line);}
  .feature-block:first-of-type{border-top:none;padding-top:0;}
  .feature-index{font-size:36px;font-weight:800;color:transparent;-webkit-text-stroke:1px var(--brand-500);line-height:1;}
  .feature-index small{display:block;margin-top:12px;font-size:13px;font-weight:600;color:var(--text-500);-webkit-text-stroke:0;}
  .feature-row{display:grid;grid-template-columns:1.25fr .85fr;gap:20px;align-items:start;}
  .feature-panel h3{font-size:20px;font-weight:700;color:var(--text-100);}
  .feature-panel p{margin-top:12px;color:var(--text-300);font-size:15px;}
  .feature-list{margin-top:16px;display:flex;flex-direction:column;gap:10px;}
  .feature-list li{display:flex;gap:10px;font-size:14px;color:var(--text-300);}
  .feature-list li::before{content:"";flex:0 0 auto;width:6px;height:6px;border-radius:50%;background:var(--brand-500);margin-top:11px;}
  .feature-side{background:var(--ink-800);border-radius:var(--radius-md);padding:20px;box-shadow:0 0 0 1px rgba(124,92,255,.16);}
  .feature-side h4{font-size:16px;font-weight:700;color:var(--text-100);}
  .feature-side p{margin-top:10px;font-size:14px;color:var(--text-300);}
  .feature-side .mini{margin-top:14px;font-size:12px;color:var(--text-500);}

  /* ---------- 场景 ---------- */
  .scene{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:36px 0;}
  .scene + .scene{border-top:1px dashed var(--line);}
  .scene.reverse .scene-media{order:2;}
  .scene-media{border-radius:var(--radius-lg);overflow:hidden;aspect-ratio:4/3;box-shadow:var(--shadow-card);}
  .scene-media img{width:100%;height:100%;object-fit:cover;}
  .scene-text h3{font-size:22px;font-weight:700;color:var(--text-100);margin-top:14px;}
  .scene-text > p{margin-top:14px;color:var(--text-300);font-size:15px;}
  .scene-quote{margin-top:20px;padding-left:16px;border-left:3px solid var(--brand-500);font-size:14px;color:var(--text-100);}
  .scene-list{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
  .scene-list li{display:flex;gap:10px;font-size:14px;color:var(--text-300);}
  .scene-list li b{flex:0 0 auto;color:var(--brand-500);font-weight:700;}

  /* ---------- 用户反馈 ---------- */
  .proof-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;}
  .proof-lg{grid-column:span 3;}
  .proof-sm{grid-column:span 2;}
  .proof-quote{font-size:15px;color:var(--text-100);line-height:1.8;}
  .proof-from{margin-top:16px;font-size:13px;color:var(--text-500);}
  .proof-result{margin-top:14px;display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--accent-500);background:rgba(255,122,69,.12);border-radius:999px;padding:6px 14px;}

  /* ---------- 方案 ---------- */
  .plans{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start;}
  .plan{position:relative;display:flex;flex-direction:column;height:100%;}
  .plan.hot{border-radius:var(--radius-lg);background:linear-gradient(180deg,rgba(43,227,196,.10),rgba(21,16,42,1) 42%);box-shadow:0 0 0 1px rgba(43,227,196,.45), 0 28px 56px -24px rgba(0,0,0,.85);}
  .plan.hot .card{background:transparent;box-shadow:none;height:100%;}
  .plan.hot .card:hover{transform:none;}
  .plan-tag{position:absolute;top:-12px;left:22px;z-index:2;background:var(--brand-500);color:#0B0817;font-size:12px;font-weight:700;border-radius:999px;padding:5px 14px;}
  .plan h3{font-size:19px;font-weight:700;color:var(--text-100);}
  .plan-desc{margin-top:8px;font-size:13px;color:var(--text-500);}
  .plan-price{margin-top:20px;font-size:34px;font-weight:800;color:var(--text-100);line-height:1;}
  .plan-price i{font-style:normal;font-size:14px;font-weight:500;color:var(--text-500);margin-left:6px;}
  .plan ul{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
  .plan ul li{display:flex;gap:10px;font-size:14px;color:var(--text-300);}
  .plan ul li::before{content:"✓";color:var(--brand-500);font-weight:700;}
  .plan .btn{margin-top:26px;width:100%;}

  /* ---------- 最新信息 ---------- */
  .post-card{background:var(--ink-900);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);overflow:hidden;height:100%;transition:transform .2s var(--ease),box-shadow .2s var(--ease);}
  .post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);}
  .post-card-link{display:flex;flex-direction:column;height:100%;color:inherit;}
  .post-card-link:hover{color:inherit;}
  .post-cover{aspect-ratio:16/10;overflow:hidden;background:var(--ink-800);}
  .post-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease);}
  .post-card:hover .post-cover img{transform:scale(1.04);}
  .post-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1;}
  .post-title{font-size:17px;font-weight:700;color:var(--text-100);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .post-excerpt{font-size:14px;color:var(--text-300);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .post-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-500);border-top:1px solid var(--line);padding-top:12px;}
  .post-meta span{color:var(--brand-500);font-weight:600;}
  .empty-card{background:var(--ink-900);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);padding:48px 24px;text-align:center;color:var(--text-300);}

  /* ---------- FAQ ---------- */
  .faq-wrap{display:grid;grid-template-columns:280px 1fr;gap:48px;}
  .faq-side h2{font-size:26px;font-weight:800;}
  .faq-side p{margin-top:14px;color:var(--text-300);font-size:14px;}
  .faq-list{background:var(--ink-900);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);overflow:hidden;}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-item:last-child{border-bottom:none;}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
    min-height:56px;padding:16px 24px;font-size:15px;font-weight:600;color:var(--text-100);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:hover{color:var(--brand-500);}
  .faq-item summary .ico{flex:0 0 auto;width:22px;height:22px;border-radius:6px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--brand-500);font-size:15px;line-height:1;}
  .faq-item[open] summary{color:var(--brand-500);}
  .faq-item[open] summary .ico{border-color:var(--brand-500);background:rgba(43,227,196,.12);}
  .faq-body{padding:0 24px 18px;color:var(--text-300);font-size:14px;line-height:1.85;}

  /* ---------- CTA ---------- */
  .cta-band{
    border-radius:20px;padding:40px;
    background:linear-gradient(135deg,rgba(43,227,196,.14),rgba(124,92,255,.14) 55%,rgba(255,122,69,.12));
    box-shadow:0 0 0 1px rgba(43,227,196,.35), 0 30px 60px -30px rgba(0,0,0,.9);
    display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start;
  }
  .cta-band h2{font-size:28px;font-weight:800;color:var(--text-100);}
  .cta-band p{margin-top:14px;color:var(--text-300);font-size:15px;}
  .form{background:rgba(14,10,27,.55);border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;}
  .field{margin-bottom:16px;}
  .field label{display:block;font-size:13px;color:var(--text-300);margin-bottom:8px;}
  .field input,.field textarea{
    width:100%;background:var(--ink-800);border:1px solid var(--line);border-radius:var(--radius-sm);
    padding:12px 14px;font-size:14px;color:var(--text-100);min-height:46px;
  }
  .field textarea{min-height:96px;resize:vertical;line-height:1.7;}
  .field input::placeholder,.field textarea::placeholder{color:var(--text-500);}
  .field input:focus,.field textarea:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(43,227,196,.14);}
  .form-note{margin-top:12px;font-size:12px;color:var(--text-500);}
  .form-alert{margin-top:14px;font-size:13px;color:var(--accent-500);border-left:3px solid var(--accent-500);padding-left:10px;display:none;}
  .form-alert.show{display:block;}

  /* ---------- 页脚 ---------- */
  .footer{margin-top:auto;background:var(--ink-900);border-top:1px solid var(--line);padding:56px 0 0;}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
  .footer h4{font-size:14px;font-weight:600;color:var(--text-100);margin-bottom:16px;}
  .footer p{font-size:13px;color:var(--text-500);}
  .footer-links{display:flex;flex-direction:column;gap:10px;}
  .footer-links a{font-size:14px;color:var(--text-300);}
  .footer-links a:hover{color:var(--brand-500);}
  .footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
  .footer-bottom{
    margin-top:48px;border-top:1px solid var(--line);padding:20px 0;
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
    font-size:13px;color:var(--text-500);
  }
  .footer-bottom a{color:var(--text-300);}
  .footer-bottom a:hover{color:var(--brand-500);}

  @media (prefers-reduced-motion: reduce){
    *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
  }

  /* ---------- 平板 ---------- */
  @media (max-width:1023px){
    .sidebar{width:72px;padding:20px 8px;gap:16px;align-items:stretch;}
    .logo{justify-content:center;}
    .logo-text{display:none;}
    .nav-title,.sidebar-divider,.sidebar-minor,.sidebar-foot{display:none;}
    .nav-item{padding:0;justify-content:center;}
    .nav-item .nav-text{display:none;}
    .nav-abbr{display:block;}
    .nav-item.active::before{left:-8px;}
    .sidebar-cta{padding:0;}
    .sidebar-cta .cta-text{display:none;}
    .main{margin-left:72px;}
    .hero h1{font-size:34px;}
    .hero-grid{grid-template-columns:1fr;gap:32px;min-height:0;}
    .hero-visual{order:2;}
    .stats-grid{grid-template-columns:repeat(2,1fr);}
    .stat{border-bottom:1px solid var(--line);}
    .stat:nth-child(2n){border-right:none;}
    .feature-block{grid-template-columns:80px 1fr;gap:24px;}
    .feature-row{grid-template-columns:1fr;}
    .proof-grid{grid-template-columns:repeat(2,1fr);}
    .proof-lg,.proof-sm{grid-column:span 1;}
    .plans{grid-template-columns:1fr;}
    .faq-wrap{grid-template-columns:1fr;gap:28px;}
    .cta-band{grid-template-columns:1fr;padding:32px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
    .section{padding:56px 0;}
    .container{padding:0 24px;}
  }

  /* ---------- 手机 ---------- */
  @media (max-width:639px){
    .topbar{display:flex;}
    .sidebar{
      width:82vw;max-width:320px;left:auto;right:0;padding:22px 18px;
      transform:translateX(101%);transition:transform .28s var(--ease);
      box-shadow:-24px 0 60px -30px rgba(0,0,0,.9);
    }
    .sidebar.open{transform:translateX(0);}
    .sidebar .logo{justify-content:flex-start;}
    .sidebar .logo-text{display:flex;}
    .sidebar .nav-title,.sidebar .sidebar-divider,.sidebar .sidebar-minor,.sidebar .sidebar-foot{display:flex;}
    .sidebar .sidebar-foot{display:block;}
    .nav-item{padding:0 16px;justify-content:flex-start;}
    .nav-item .nav-text{display:inline;}
    .nav-abbr{display:none;}
    .nav-item.active::before{left:0;}
    .sidebar-cta .cta-text{display:inline;}
    .main{margin-left:0;}
    .container{padding:0 20px;}
    .hero{padding:32px 0 8px;}
    .hero h1{font-size:28px;}
    .hero-sub{font-size:15px;}
    .hero-actions{gap:14px;}
    .hero-actions .btn{width:100%;}
    .section{padding:44px 0;}
    .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px;}
    .section-head h2{font-size:23px;}
    .stats-grid{grid-template-columns:1fr;}
    .stat{border-right:none;}
    .feature-block{grid-template-columns:1fr;gap:14px;}
    .feature-index{font-size:28px;}
    .scene{grid-template-columns:1fr;gap:24px;}
    .scene.reverse .scene-media{order:0;}
    .scene-text h3{font-size:19px;}
    .proof-grid{grid-template-columns:1fr;}
    .post-title{font-size:16px;}
    .plan-price{font-size:30px;}
    .cta-band{padding:24px;border-radius:16px;}
    .cta-band h2{font-size:22px;}
    .footer{padding-top:40px;}
    .footer-grid{grid-template-columns:1fr;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
    .faq-item summary{padding:14px 18px;font-size:14px;}
    .faq-body{padding:0 18px 16px;}
  }

/* roulang page: article */
:root{
  --ink-950:#0E0A1B;
  --ink-900:#15102A;
  --ink-800:#1E1738;
  --line:#2E2650;
  --brand-500:#2BE3C4;
  --brand-600:#14BFA4;
  --accent-500:#FF7A45;
  --violet-500:#7C5CFF;
  --text-100:#F2F0FA;
  --text-300:#B9B2D6;
  --text-500:#7E769E;
  --paper:#FBFAFF;
  --radius-card:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --shadow-ring:0 0 0 1px rgba(43,227,196,.14), 0 24px 48px -26px rgba(0,0,0,.92);
  --ease:cubic-bezier(.2,.7,.3,1);
  --shell-w:240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--ink-950);
  background-image:linear-gradient(rgba(46,38,80,.32) 1px, transparent 1px),linear-gradient(90deg, rgba(46,38,80,.32) 1px, transparent 1px);
  background-size:64px 64px,64px 64px;
  color:var(--text-100);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:15px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-500);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease)}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
h1,h2,h3,h4{letter-spacing:0}
::selection{background:rgba(43,227,196,.3);color:#0B0718}

.container{width:100%;max-width:1280px;margin:0 auto;padding:0 40px}
@media (max-width:1023px){.container{padding:0 24px}}
@media (max-width:639px){.container{padding:0 20px}}

/* ---------- App Shell ---------- */
.shell{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--shell-w);
  padding:24px 18px;
  background:var(--ink-900);
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  gap:18px;
  overflow-y:auto;
  z-index:60;
  transition:transform .24s var(--ease);
}
.shell-brand{display:flex;align-items:center;gap:12px;padding:0 6px 6px}
.logo-mark{
  flex:none;
  width:42px;height:42px;
  border-radius:12px;
  background:linear-gradient(140deg,var(--brand-500),var(--violet-500));
  color:#08131F;
  font-weight:800;
  font-size:15px;
  display:grid;place-items:center;
  box-shadow:0 0 0 1px rgba(43,227,196,.35);
}
.brand-text strong{display:block;font-size:14px;line-height:1.35;font-weight:700;color:var(--text-100)}
.brand-text small{display:block;font-size:11px;line-height:1.4;color:var(--text-500);margin-top:3px}
.nav{display:flex;flex-direction:column;gap:4px}
.nav-title{font-size:12px;color:var(--text-500);padding:0 16px 8px;display:block}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:10px;
  height:44px;
  padding:0 16px;
  border-radius:10px;
  color:var(--text-300);
  font-size:15px;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.nav-item:hover{background:rgba(43,227,196,.08);color:var(--text-100)}
.nav-item.active{background:rgba(43,227,196,.12);color:var(--brand-500)}
.nav-item.active::before{content:"";position:absolute;left:0;top:11px;bottom:11px;width:3px;border-radius:2px;background:var(--brand-500)}
.nav-abbr{display:none;font-size:15px;font-weight:700}
.nav-sep{height:1px;background:var(--line);margin:6px 8px}
.nav-minor{display:flex;flex-direction:column;gap:8px;padding:0 16px}
.nav-minor a{font-size:13px;color:var(--text-500)}
.nav-minor a:hover{color:var(--brand-500)}
.shell-copy{margin-top:auto;font-size:11px;line-height:1.6;color:var(--text-500);padding:0 8px}

.main{margin-left:var(--shell-w);min-height:100vh;display:flex;flex-direction:column}
.topbar{display:none}
.mask{position:fixed;inset:0;background:rgba(6,4,14,.72);opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s;z-index:55}
.mask.show{opacity:1;visibility:visible}

@media (max-width:1023px){
  .shell{width:72px;padding:18px 10px;align-items:stretch}
  .shell-brand{justify-content:center;padding:0 0 6px}
  .brand-text{display:none}
  .nav-title{display:none}
  .nav-item{justify-content:center;padding:0}
  .nav-text{display:none}
  .nav-abbr{display:inline-flex}
  .nav-minor{display:none}
  .shell-copy{display:none}
  .main{margin-left:72px}
  .shell .btn span{display:none}
  .shell .btn{padding:0;width:100%;justify-content:center;font-size:0}
  .shell .btn::after{content:"入";font-size:15px}
}
@media (max-width:639px){
  .topbar{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    position:sticky;top:0;height:56px;padding:0 16px;
    background:rgba(21,16,42,.94);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    z-index:70;
  }
  .topbar-brand{display:flex;align-items:center;gap:10px;color:var(--text-100);font-size:14px;font-weight:700}
  .topbar-brand .logo-mark{width:32px;height:32px;border-radius:10px;font-size:12px}
  .topbar-btn{
    height:38px;padding:0 14px;border-radius:10px;
    background:rgba(43,227,196,.12);
    border:1px solid rgba(43,227,196,.4);
    color:var(--brand-500);font-size:13px;font-weight:600;cursor:pointer;
    transition:background-color .2s var(--ease),border-color .2s var(--ease);
  }
  .topbar-btn:hover{background:rgba(43,227,196,.2)}
  .topbar-btn:active{transform:scale(.98)}
  .shell{
    width:82vw;max-width:340px;
    padding:22px 18px;
    transform:translateX(103%);
  }
  .shell.open{transform:translateX(0)}
  .shell-brand{justify-content:flex-start;padding:0 6px 6px}
  .brand-text{display:block}
  .nav-title{display:block}
  .nav-item{justify-content:flex-start;padding:0 16px}
  .nav-text{display:inline}
  .nav-abbr{display:none}
  .nav-minor{display:flex}
  .shell-copy{display:block}
  .shell .btn{padding:0 24px;width:100%;font-size:15px}
  .shell .btn::after{content:none}
  .main{margin-left:0}
}

/* ---------- 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:filter .2s var(--ease),box-shadow .2s var(--ease),transform .15s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{background:var(--accent-500);color:#1A0A02}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 0 0 4px rgba(255,122,69,.18)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:transparent;border-color:rgba(43,227,196,.55);color:var(--brand-500)}
.btn-ghost:hover{background:rgba(43,227,196,.1);border-color:var(--brand-500);color:var(--brand-500)}
.btn-ghost:active{transform:scale(.98)}
.btn-block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed;filter:none;box-shadow:none}
.text-link{color:var(--brand-500);font-weight:600;border-bottom:2px solid transparent;padding-bottom:2px}
.text-link:hover{border-color:var(--brand-500)}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:999px;font-size:12px;font-weight:600;line-height:1;white-space:nowrap;
}
.badge-brand{background:rgba(43,227,196,.12);color:var(--brand-500);border:1px solid rgba(43,227,196,.3)}
.badge-violet{background:rgba(124,92,255,.16);color:#B6A3FF;border:1px solid rgba(124,92,255,.34)}
.badge-accent{background:rgba(255,122,69,.14);color:#FFB08D;border:1px solid rgba(255,122,69,.32)}

/* ---------- 文章头部 ---------- */
.article-head{
  padding:44px 0 36px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(760px 320px at 8% -20%, rgba(124,92,255,.24), transparent 62%),
    radial-gradient(680px 300px at 88% -10%, rgba(43,227,196,.16), transparent 66%),
    var(--ink-950);
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-500);margin-bottom:18px}
.crumb a{color:var(--text-300)}
.crumb a:hover{color:var(--brand-500)}
.crumb span.sep{color:var(--line)}
.crumb-current{color:var(--text-500);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-title{
  font-size:clamp(26px,3.4vw,42px);
  line-height:1.18;
  font-weight:800;
  color:var(--text-100);
  margin:14px 0 16px;
  max-width:22ch;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-500)}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.cover-figure{position:relative;margin:28px 0 0;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);aspect-ratio:16/9;background:var(--ink-800);box-shadow:var(--shadow-ring)}
.cover-figure img{width:100%;height:100%;object-fit:cover}
.cover-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,10,27,0) 45%,rgba(14,10,27,.78))}
.cover-caption{position:absolute;left:20px;bottom:16px;z-index:2;font-size:13px;color:var(--text-300)}

/* ---------- 板块 ---------- */
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:72px 0}}
.section-tight{padding:36px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.section-head h2{font-size:clamp(20px,2.4vw,28px);font-weight:700;margin:0;color:var(--text-100)}
.section-head p{margin:8px 0 0;font-size:14px;color:var(--text-300);max-width:62ch}

/* ---------- 正文双栏 ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start}
@media (max-width:1023px){.article-layout{grid-template-columns:1fr;gap:22px}}
.paper{
  background:var(--paper);
  color:#1A1330;
  border-radius:20px;
  padding:40px;
  max-width:820px;
  font-size:16px;
  line-height:1.85;
  box-shadow:0 0 0 1px rgba(43,227,196,.14),0 34px 64px -34px rgba(0,0,0,.95);
}
@media (max-width:639px){.paper{padding:24px 20px;font-size:15.5px}}
.paper > * + *{margin-top:1.2em}
.paper h2{font-size:clamp(21px,2.2vw,26px);line-height:1.4;font-weight:700;color:#150F2C;margin:2em 0 0;padding-left:14px;border-left:4px solid var(--brand-600)}
.paper h3{font-size:19px;line-height:1.5;font-weight:700;color:#150F2C;margin:1.7em 0 0}
.paper h4{font-size:17px;font-weight:700;color:#1F1740;margin:1.4em 0 0}
.paper p{margin:0;color:#1A1330}
.paper strong{color:#0F0A22;font-weight:700}
.paper a{color:#0B7A69;text-decoration:underline;text-underline-offset:3px}
.paper a:hover{color:#075C4F}
.paper ul,.paper ol{padding-left:1.35em;margin:0}
.paper li{margin:.5em 0;line-height:1.9}
.paper blockquote{margin:1.4em 0;padding:14px 18px;background:#F0EEFA;border-left:4px solid var(--violet-500);border-radius:0 12px 12px 0;color:#3B3460}
.paper blockquote p{color:#3B3460}
.paper img{border-radius:12px;margin:1.4em auto;height:auto}
.paper figure{margin:1.4em 0}
.paper figcaption{font-size:13px;color:#5A5470;text-align:center;margin-top:8px}
.paper table{width:100%;border-collapse:collapse;font-size:14px;margin:1.4em 0;border-radius:12px;overflow:hidden}
.paper thead th{background:#EEEBFA;color:#221A45;text-align:left;padding:12px 14px;font-weight:600}
.paper tbody td{padding:12px 14px;border-top:1px solid #E4E0F2;color:#2A2347}
.paper tbody tr:nth-child(even){background:#F6F4FD}
.paper hr{border:0;border-top:1px solid #E4E0F2;margin:2em 0}
.paper code{background:#EDEAF8;padding:2px 6px;border-radius:6px;font-size:14px}
.wide-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;padding-top:24px;border-top:1px dashed #D9D4EE}
.tag{font-size:13px;line-height:1;padding:8px 13px;border-radius:999px;background:#EFECFA;color:#4A4270}

.empty-card{text-align:center;padding:48px 20px;max-width:520px;margin:0 auto}
.empty-icon{width:54px;height:54px;margin:0 auto 18px;border-radius:14px;display:grid;place-items:center;background:#EFECFA;color:#0FA88F;font-size:22px;font-weight:800}
.empty-card h2{font-size:22px;font-weight:700;color:#150F2C;margin:0 0 10px;border:0;padding:0}
.empty-card p{font-size:14.5px;color:#5A5470;margin:0 0 22px}

/* ---------- 侧栏 ---------- */
.side-stack{display:flex;flex-direction:column;gap:20px;position:sticky;top:24px}
@media (max-width:1023px){.side-stack{position:static;order:2}}
.side-card{background:var(--ink-900);border:1px solid var(--line);border-radius:var(--radius-card);padding:20px}
.side-card h3{font-size:15px;font-weight:600;color:var(--text-100);margin:0 0 14px}
.side-link{display:flex;align-items:flex-start;gap:10px;padding:11px 0;border-top:1px solid rgba(46,38,80,.75);font-size:14px;color:var(--text-300);line-height:1.6}
.side-link:first-of-type{border-top:0;padding-top:0}
.side-link:hover{color:var(--brand-500)}
.side-link .idx{font-size:12px;color:var(--text-500);font-weight:700;flex:none;padding-top:2px}
.side-note{font-size:13px;color:var(--text-500);margin:0}
.mini-item{display:flex;gap:12px;align-items:center;padding:10px 0;border-top:1px solid rgba(46,38,80,.75)}
.mini-item:first-of-type{border-top:0;padding-top:0}
.mini-item img{width:72px;height:48px;object-fit:cover;border-radius:8px;flex:none;background:var(--ink-800)}
.mini-item span{font-size:13.5px;line-height:1.55;color:var(--text-300)}
.mini-item:hover span{color:var(--brand-500)}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
@media (max-width:1023px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:639px){.card-grid{grid-template-columns:1fr}}
.card{
  display:flex;flex-direction:column;gap:12px;
  background:var(--ink-900);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(43,227,196,.45);box-shadow:var(--shadow-ring)}
.card figure{margin:0;border-radius:var(--radius-sm);overflow:hidden;aspect-ratio:16/10;background:var(--ink-800)}
.card figure img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.card:hover figure img{transform:scale(1.03)}
.card h3{
  font-size:18px;line-height:1.45;font-weight:700;color:var(--text-100);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card p{
  font-size:14px;line-height:1.7;color:var(--text-300);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--text-500);margin-top:auto;padding-top:8px}
.card-meta .go{color:var(--brand-500);font-weight:600}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:36px 40px;
  border-radius:20px;
  border:1px solid rgba(43,227,196,.3);
  background:linear-gradient(120deg, rgba(43,227,196,.16), rgba(124,92,255,.2)), var(--ink-900);
  overflow:hidden;
}
@media (max-width:639px){.cta-band{padding:26px 22px}}
.cta-band::before{
  content:"";position:absolute;left:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle, rgba(43,227,196,.28), transparent 68%);
}
.cta-band h2{position:relative;font-size:clamp(20px,2.4vw,28px);font-weight:700;margin:0 0 10px;color:var(--text-100)}
.cta-band p{position:relative;margin:0;font-size:14.5px;color:var(--text-300);max-width:60ch}
.cta-actions{position:relative;display:flex;align-items:center;gap:18px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.footer{margin-top:auto;background:var(--ink-900);border-top:1px solid var(--line);padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:32px}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:639px){.footer-grid{grid-template-columns:1fr;gap:26px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:4px}
.footer-brand .logo-mark{width:32px;height:32px;border-radius:10px;font-size:13px}
.footer h4{font-size:14px;font-weight:600;color:var(--text-100);margin:0 0 14px}
.footer p{font-size:14px;line-height:1.8;color:var(--text-300);margin:12px 0 0}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-300)}
.footer-links a:hover{color:var(--brand-500)}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--text-500);
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
  --ink-950:#0E0A1B;
  --ink-900:#15102A;
  --ink-800:#1E1738;
  --line:#2E2650;
  --brand-500:#2BE3C4;
  --brand-600:#14BFA4;
  --accent-500:#FF7A45;
  --violet-500:#7C5CFF;
  --text-100:#F2F0FA;
  --text-300:#B9B2D6;
  --text-500:#7E769E;
  --paper:#FBFAFF;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-card:0 0 0 1px rgba(43,227,196,.10), 0 24px 48px -22px rgba(0,0,0,.85);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--text-100);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--text-300);text-decoration:none;transition:color .2s var(--ease),background-color .2s var(--ease)}
a:hover{color:var(--brand-500)}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.25;color:var(--text-100)}
h1{font-size:40px;line-height:1.15;letter-spacing:0}
h2{font-size:30px}
h3{font-size:19px}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
::selection{background:rgba(43,227,196,.3);color:#fff}

/* ---------- layout ---------- */
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 40px}
.section{padding:64px 0}
.section.tight{padding:40px 0 8px}
@media (min-width:1024px){.section{padding:92px 0}.section.tight{padding:52px 0 8px}}
@media (max-width:1023px){.container{padding:0 24px}}
@media (max-width:639px){.container{padding:0 20px}}

.main{margin-left:240px;min-height:100vh;display:flex;flex-direction:column}
@media (min-width:640px) and (max-width:1023px){.main{margin-left:72px}}
@media (max-width:639px){.main{margin-left:0}}

/* ---------- sidebar shell ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:240px;z-index:70;
  background:var(--ink-900);border-right:1px solid var(--line);
  padding:22px 16px 20px;display:flex;flex-direction:column;gap:20px;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:11px;padding:2px 4px 0}
.brand:hover .brand-text strong{color:var(--brand-500)}
.logo-mark{
  flex:0 0 auto;width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  font-size:14px;font-weight:800;letter-spacing:.02em;color:#06171A;
  background:linear-gradient(140deg,var(--brand-500),var(--violet-500));
  box-shadow:0 0 0 1px rgba(43,227,196,.35),0 12px 26px -12px rgba(43,227,196,.7);
}
.brand-text strong{display:block;font-size:14px;line-height:1.35;font-weight:800;color:var(--text-100);transition:color .2s var(--ease)}
.brand-text em{font-style:normal;display:block;font-size:11px;color:var(--text-500);line-height:1.4}
.nav{display:flex;flex-direction:column;gap:6px}
.nav-title{font-size:12px;color:var(--text-500);padding:0 4px 6px;letter-spacing:.06em}
.nav-item{
  position:relative;height:44px;display:flex;align-items:center;gap:10px;
  padding:0 14px;border-radius:var(--radius-sm);color:var(--text-300);font-size:14.5px;font-weight:500;
}
.nav-item:hover{background:rgba(43,227,196,.08);color:var(--text-100)}
.nav-item.active{background:rgba(43,227,196,.12);color:var(--brand-500);font-weight:600}
.nav-item.active::before{content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:3px;background:var(--brand-500)}
.nav-item:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.nav-abbr{display:none}
.sidebar-cta{width:100%;margin-top:2px}
.sidebar-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px}
.sidebar-foot a{font-size:13px;color:var(--text-500);padding:2px 4px}
.sidebar-foot a:hover{color:var(--brand-500)}
.sidebar-copy{font-size:11.5px;color:var(--text-500);line-height:1.6;padding:6px 4px 0;margin:0}

/* ---------- topbar + drawer (mobile) ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:75;
  background:rgba(21,16,42,.96);border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);align-items:center;justify-content:space-between;padding:0 14px;
}
.topbar .brand-text strong{font-size:13px}
.topbar .logo-mark{width:32px;height:32px;border-radius:9px;font-size:11px}
.menu-btn{
  width:44px;height:44px;border-radius:var(--radius-sm);background:rgba(43,227,196,.1);
  border:1px solid rgba(43,227,196,.35);color:var(--brand-500);font-size:13px;font-weight:600;cursor:pointer;
}
.menu-btn:hover{background:rgba(43,227,196,.2)}
.menu-btn:active{transform:scale(.97)}
.mask{position:fixed;inset:0;background:rgba(6,4,14,.68);opacity:0;pointer-events:none;transition:opacity .25s var(--ease);z-index:80}
.mask.open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82vw;max-width:330px;z-index:90;
  background:var(--ink-900);border-left:1px solid var(--line);padding:20px 18px;
  transform:translateX(102%);transition:transform .28s var(--ease);overflow-y:auto;
  display:flex;flex-direction:column;gap:18px;
}
.drawer.open{transform:translateX(0)}
.drawer-close{position:absolute;top:14px;right:14px;width:40px;height:40px;border-radius:var(--radius-sm);background:transparent;border:1px solid var(--line);color:var(--text-300);font-size:16px;cursor:pointer}
.drawer-close:hover{color:var(--brand-500);border-color:rgba(43,227,196,.5)}
@media (max-width:639px){
  .sidebar{display:none}
  .topbar{display:flex}
  .main{padding-top:56px}
}

/* medium: collapse sidebar to icon rail */
@media (min-width:640px) and (max-width:1023px){
  .sidebar{width:72px;padding:18px 10px;align-items:center;gap:16px}
  .brand{padding:0}
  .brand-text,.nav-title,.sidebar-copy{display:none}
  .nav{width:100%;align-items:center}
  .nav-item{justify-content:center;padding:0;width:44px}
  .nav-text{display:none}
  .nav-abbr{display:block;font-size:14px;font-weight:700}
  .sidebar-cta{width:44px;height:44px;padding:0;font-size:0;gap:0}
  .sidebar-cta::after{content:"咨询";font-size:11px;font-weight:700}
  .sidebar-foot{align-items:center;width:100%}
  .sidebar-foot a{font-size:0;width:36px;height:36px;display:grid;place-items:center;border-radius:9px;background:rgba(43,227,196,.06)}
  .sidebar-foot a::after{font-size:12px;color:var(--text-500)}
  .sidebar-foot a:nth-child(1)::after{content:"步"}
  .sidebar-foot a:nth-child(2)::after{content:"答"}
  .sidebar-foot a:nth-child(3)::after{content:"首"}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;
  transition:filter .2s var(--ease),transform .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--accent-500);color:#231005;box-shadow:0 14px 30px -16px rgba(255,122,69,.9)}
.btn-primary:hover{filter:brightness(1.06);color:#231005;box-shadow:0 0 0 1px rgba(255,122,69,.45),0 18px 34px -16px rgba(255,122,69,.85)}
.btn-ghost{background:transparent;border-color:rgba(43,227,196,.45);color:var(--brand-500)}
.btn-ghost:hover{background:rgba(43,227,196,.1);border-color:var(--brand-500);color:var(--brand-500)}
.btn-soft{background:rgba(124,92,255,.14);border-color:rgba(124,92,255,.4);color:#C3B4FF}
.btn-soft:hover{background:rgba(124,92,255,.24);color:#DAD2FF}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand-500);font-weight:600;font-size:14.5px;
  border-bottom:2px solid rgba(43,227,196,.35);padding-bottom:2px;height:auto;
}
.btn-link:hover{color:var(--brand-500);border-bottom-color:var(--brand-500)}
.btn[disabled],.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;filter:none}

.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  background:rgba(43,227,196,.12);color:var(--brand-500);border:1px solid rgba(43,227,196,.28);
}
.badge.violet{background:rgba(124,92,255,.14);color:#C3B4FF;border-color:rgba(124,92,255,.3)}
.badge.accent{background:rgba(255,122,69,.14);color:#FFA57C;border-color:rgba(255,122,69,.3)}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;min-height:300px;display:flex;align-items:center;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(14,10,27,.95) 0%,rgba(14,10,27,.82) 46%,rgba(14,10,27,.5) 100%);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:linear-gradient(rgba(43,227,196,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(43,227,196,.07) 1px,transparent 1px);
  background-size:46px 46px;
}
.page-hero .container{position:relative;z-index:2;padding-top:52px;padding-bottom:52px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-500);margin-bottom:18px}
.crumbs a{color:var(--text-500)}
.crumbs a:hover{color:var(--brand-500)}
.crumbs .sep{color:var(--line)}
.crumbs .current{color:var(--text-300)}
.page-hero h1{margin:14px 0 16px;max-width:19em}
.hero-sub{max-width:44em;color:var(--text-300);font-size:16px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px 20px}

/* ---------- stats ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  background:var(--ink-900);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px 32px;box-shadow:var(--shadow-card);
}
.stat-num{font-size:34px;font-weight:800;line-height:1.1;color:var(--brand-500);letter-spacing:-.01em}
.stat-num.alt{color:var(--accent-500)}
.stat-num.vio{color:var(--violet-500)}
.stat-num small{font-size:14px;font-weight:700;margin-left:3px}
.stat-label{font-size:13px;color:var(--text-500);margin-top:6px;line-height:1.6}

/* ---------- section heading ---------- */
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.section-head h2{margin-top:12px}
.section-head p{color:var(--text-300);font-size:15px;max-width:60ch;margin:10px 0 0}
.section-index{font-size:13px;font-weight:700;color:var(--brand-500);letter-spacing:.14em}

/* ---------- step layout ---------- */
.step-layout{display:grid;grid-template-columns:264px minmax(0,1fr);gap:40px;align-items:start}
.toc{
  position:sticky;top:28px;background:var(--ink-900);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:18px 16px;box-shadow:var(--shadow-card);
}
.toc h3{font-size:14px;color:var(--text-100);margin-bottom:10px;padding-left:6px}
.toc a{display:block;padding:10px 12px;border-radius:var(--radius-sm);font-size:14px;color:var(--text-300)}
.toc a:hover{background:rgba(43,227,196,.08);color:var(--text-100)}
.toc a.current{background:rgba(43,227,196,.1);color:var(--brand-500)}
.toc-tip{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);font-size:12.5px;color:var(--text-500);line-height:1.7}

.timeline{position:relative;padding-left:38px}
.timeline::before{
  content:"";position:absolute;left:11px;top:10px;bottom:26px;width:2px;
  background:linear-gradient(180deg,var(--brand-500),rgba(124,92,255,.45),rgba(46,38,80,0));
}
.step{position:relative;padding-bottom:26px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:-38px;top:16px;width:22px;height:22px;border-radius:999px;
  background:var(--ink-800);border:2px solid var(--brand-500);box-shadow:0 0 0 5px rgba(43,227,196,.09);
}
.step-card{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:20px 22px;transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.step-card:hover{transform:translateY(-4px);border-color:rgba(43,227,196,.45);box-shadow:0 0 0 1px rgba(43,227,196,.22),0 26px 44px -26px rgba(0,0,0,.95)}
.step-head{display:flex;align-items:center;gap:12px;margin-bottom:8px}
.step-no{font-size:13px;font-weight:800;color:var(--brand-500);letter-spacing:.08em}
.step-card h3{font-size:18px}
.step-card p{color:var(--text-300);font-size:15px;margin:0}
.step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* ---------- feature rows ---------- */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;margin-bottom:56px}
.feature-row:last-child{margin-bottom:0}
.feature-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);aspect-ratio:4/3}
.feature-media img{width:100%;height:100%;object-fit:cover}
.feature-media::after{content:"";position:absolute;inset:0;background:linear-gradient(160deg,rgba(14,10,27,.12),rgba(14,10,27,.55))}
.feature-body h3{font-size:22px;margin-bottom:12px}
.feature-body p{color:var(--text-300);font-size:15px}
.check-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.check-list li{position:relative;padding-left:24px;font-size:14.5px;color:var(--text-300)}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:9px;height:9px;border-radius:3px;
  background:linear-gradient(140deg,var(--brand-500),var(--violet-500));
}
@media (max-width:1023px){
  .step-layout{grid-template-columns:1fr}
  .toc{position:static}
  .feature-row{grid-template-columns:1fr;gap:24px;margin-bottom:44px}
  .feature-row.reverse .feature-media{order:2}
}

/* ---------- faq ---------- */
.faq{background:var(--ink-900);border:1px solid var(--line);border-radius:var(--radius-lg);padding:8px 24px;box-shadow:var(--shadow-card)}
.faq details{border-bottom:1px solid var(--line)}
.faq details:last-child{border-bottom:none}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;padding:10px 0;cursor:pointer;font-size:16px;font-weight:600;color:var(--text-100);
  list-style:none;transition:color .2s var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:20px;color:var(--brand-500);font-weight:700;transition:transform .2s var(--ease)}
.faq summary:hover{color:var(--brand-500)}
.faq summary:focus-visible{outline:2px solid var(--brand-500);outline-offset:3px;border-radius:6px}
.faq details[open] summary{color:var(--brand-500)}
.faq details[open] summary::after{content:"−"}
.faq .answer{padding:0 0 18px;color:var(--text-300);font-size:15px;max-width:78ch}

/* ---------- form ---------- */
.apply-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:40px;align-items:start}
.panel{background:var(--ink-900);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-card)}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.field label{font-size:14px;color:var(--text-300);font-weight:600}
.field input,.field select,.field textarea{
  width:100%;height:46px;background:var(--ink-800);border:1px solid var(--line);border-radius:var(--radius-sm);
  color:var(--text-100);padding:0 14px;font-size:15px;font-family:inherit;outline:none;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{height:auto;min-height:120px;padding:12px 14px;line-height:1.75;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--text-500)}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(43,227,196,.16)}
.field .hint{font-size:12.5px;color:var(--text-500);line-height:1.6}
.form-note{margin-top:14px;font-size:13px;color:var(--text-500)}
.form-msg{
  display:none;margin-top:14px;padding:12px 14px;border-radius:var(--radius-sm);font-size:14px;
  background:rgba(43,227,196,.1);border-left:3px solid var(--brand-500);color:var(--brand-500);
}
.form-msg.show{display:block}
.apply-aside h3{font-size:19px;margin-bottom:14px}
.apply-aside p{color:var(--text-300);font-size:15px}
.aside-list{display:flex;flex-direction:column;gap:14px;margin-top:20px}
.aside-item{background:var(--ink-800);border:1px solid var(--line);border-radius:var(--radius-md);padding:16px 18px}
.aside-item strong{display:block;font-size:15px;color:var(--text-100);margin-bottom:4px}
.aside-item span{font-size:13.5px;color:var(--text-300)}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:20px;padding:42px 40px;
  background:linear-gradient(118deg,rgba(43,227,196,.16),rgba(124,92,255,.16));
  border:1px solid rgba(43,227,196,.34);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(43,227,196,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(43,227,196,.06) 1px,transparent 1px);
  background-size:38px 38px;
}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{font-size:26px;margin-bottom:8px}
.cta-band p{color:var(--text-300);font-size:15px;max-width:52ch;margin:0}

/* ---------- category cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  display:flex;flex-direction:column;background:var(--ink-800);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-card);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(43,227,196,.45)}
.card-cover{aspect-ratio:16/10;border-radius:var(--radius-md);overflow:hidden;margin-bottom:14px;border:1px solid var(--line)}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.card:hover .card-cover img{transform:scale(1.04)}
.card h3{font-size:18px;margin:10px 0 8px}
.card p{font-size:14px;color:var(--text-300);margin:0 0 16px}
.card-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-500);border-top:1px solid var(--line);padding-top:12px}
.card-meta a{color:var(--brand-500);font-weight:600}
.card-meta a:hover{color:var(--brand-500);text-decoration:underline;text-underline-offset:4px}
@media (max-width:1023px){
  .stats{grid-template-columns:repeat(2,1fr);gap:20px;padding:24px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .apply-grid{grid-template-columns:1fr}
}
@media (max-width:639px){
  h1{font-size:28px}
  h2{font-size:24px}
  .page-hero{min-height:360px}
  .page-hero .container{padding-top:38px;padding-bottom:38px}
  .stats{grid-template-columns:1fr;gap:16px;padding:20px}
  .stat-num{font-size:28px}
  .card-grid{grid-template-columns:1fr}
  .cta-band{padding:28px 22px}
  .cta-band .btn{width:100%}
  .faq{padding:4px 16px}
  .panel{padding:22px 18px}
  .timeline{padding-left:30px}
  .step::before{left:-30px;width:18px;height:18px}
  .timeline::before{left:8px}
}

/* ---------- footer ---------- */
.footer{margin-top:auto;background:var(--ink-900);border-top:1px solid var(--line);padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .logo-mark{width:34px;height:34px;border-radius:10px;font-size:12px}
.footer p{color:var(--text-300);font-size:14px;line-height:1.8;max-width:42ch}
.footer h4{font-size:14px;font-weight:600;color:var(--text-100);margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-300)}
.footer-links a:hover{color:var(--brand-500)}
.footer-bottom{
  margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:var(--text-500);
}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
@media (max-width:639px){.footer-grid{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --ink-950:#0E0A1B;
  --ink-900:#15102A;
  --ink-800:#1E1738;
  --line:#2E2650;
  --brand-500:#2BE3C4;
  --brand-600:#14BFA4;
  --accent-500:#FF7A45;
  --violet-500:#7C5CFF;
  --text-100:#F2F0FA;
  --text-300:#B9B2D6;
  --text-500:#7E769E;
  --paper:#FBFAFF;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-card:0 0 0 1px rgba(43,227,196,.10), 0 24px 48px -28px rgba(0,0,0,.92);
  --shadow-lift:0 0 0 1px rgba(43,227,196,.30), 0 30px 56px -26px rgba(0,0,0,.95);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:15px;
  line-height:1.85;
  font-weight:400;
  color:var(--text-100);
  background-color:var(--ink-950);
  background-image:
    radial-gradient(900px 520px at 88% -8%, rgba(43,227,196,.10), transparent 62%),
    radial-gradient(760px 460px at 4% 12%, rgba(124,92,255,.12), transparent 60%),
    linear-gradient(rgba(46,38,80,.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46,38,80,.22) 1px, transparent 1px);
  background-size:auto,auto,56px 56px,56px 56px;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:var(--brand-500);text-decoration:none;transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);}
a:hover{color:var(--text-100);}
h1,h2,h3,h4,p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,textarea,select{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(43,227,196,.28);color:#fff;}

.container{width:100%;max-width:1280px;margin:0 auto;padding:0 20px;}
@media (min-width:1024px){.container{padding:0 40px;}}

/* ======= 布局：App Shell ======= */
.app-main{min-height:100vh;display:flex;flex-direction:column;}
main{flex:1 1 auto;}

/* ======= 侧边导航 ======= */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:240px;z-index:60;
  background:var(--ink-900);
  border-right:1px solid var(--line);
  padding:22px 16px 20px;
  display:flex;flex-direction:column;gap:18px;
  overflow-y:auto;
}
.logo{display:flex;align-items:center;gap:12px;color:var(--text-100);}
.logo:hover{color:var(--brand-500);}
.logo-mark{
  flex:0 0 auto;width:42px;height:42px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;letter-spacing:.5px;
  color:#0E0A1B;
  background:linear-gradient(140deg,var(--brand-500),var(--brand-600) 70%,var(--violet-500));
  box-shadow:0 0 0 1px rgba(43,227,196,.35), 0 12px 26px -14px rgba(43,227,196,.75);
}
.logo-text{display:flex;flex-direction:column;line-height:1.35;}
.logo-main{font-size:14px;font-weight:800;color:var(--text-100);}
.logo-sub{font-size:11px;color:var(--text-500);}
.logo:hover .logo-main{color:var(--brand-500);}
.sidebar-foot-copy{margin-top:auto;}

.nav{display:flex;flex-direction:column;gap:6px;}
.nav-title{
  font-size:11px;color:var(--text-500);letter-spacing:1.4px;
  padding:0 16px 8px;display:block;
}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 16px;border-radius:var(--r-sm);
  color:var(--text-300);font-size:14.5px;font-weight:500;
}
.nav-item::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:0 3px 3px 0;
  background:var(--brand-500);opacity:0;transition:opacity .2s var(--ease);
}
.nav-item:hover{background:rgba(43,227,196,.08);color:var(--text-100);}
.nav-item.active{background:rgba(43,227,196,.12);color:var(--brand-500);font-weight:600;}
.nav-item.active::before{opacity:1;}
.nav-abbr{display:none;font-size:15px;font-weight:700;}

.sidebar-cta{margin-top:2px;}
.cta-icon{display:none;}

.sidebar-extra{display:flex;flex-direction:column;gap:8px;padding:16px 16px 0;border-top:1px solid var(--line);}
.sidebar-extra a{font-size:13px;color:var(--text-500);}
.sidebar-extra a:hover{color:var(--brand-500);}
.sidebar-copy{margin-top:auto;padding:16px 16px 0;border-top:1px solid var(--line);font-size:11.5px;color:var(--text-500);line-height:1.7;}

/* ======= 顶栏（移动端） ======= */
.topbar{display:none;}
.overlay{display:none;position:fixed;inset:0;background:rgba(6,4,14,.7);z-index:80;opacity:0;visibility:hidden;transition:opacity .26s var(--ease),visibility .26s var(--ease);}
.overlay.show{opacity:1;visibility:visible;}

/* ======= 按钮 ======= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:14.5px;font-weight:700;cursor:pointer;border:1px solid transparent;
  transition:transform .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.btn:active{transform:scale(.98);}
.btn[disabled],.btn.disabled{opacity:.5;cursor:not-allowed;transform:none;}
.btn-primary{
  background:var(--accent-500);color:#25100A;
  box-shadow:0 16px 30px -18px rgba(255,122,69,.9);
}
.btn-primary:hover{background:#FF8C5C;color:#25100A;box-shadow:0 0 0 1px rgba(255,122,69,.5),0 20px 40px -18px rgba(255,122,69,.95);}
.btn-ghost{background:transparent;border-color:rgba(43,227,196,.55);color:var(--brand-500);}
.btn-ghost:hover{background:rgba(43,227,196,.1);color:var(--brand-500);border-color:var(--brand-500);}
.btn-text{
  background:none;border:0;padding:0;min-height:auto;color:var(--text-300);
  border-bottom:1px solid rgba(185,178,214,.4);border-radius:0;
}
.btn-text:hover{color:var(--brand-500);border-bottom-color:var(--brand-500);}
.btn-block{width:100%;}

/* ======= 徽章 / 标签 ======= */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;
  font-size:12.5px;font-weight:600;line-height:1.6;
}
.badge-brand{background:rgba(43,227,196,.14);color:#7DF3E1;}
.badge-violet{background:rgba(124,92,255,.18);color:#B6A2FF;}
.badge-accent{background:rgba(255,122,69,.16);color:#FFA983;}

/* ======= 页头横幅 ======= */
.page-hero{
  position:relative;overflow:hidden;
  padding:56px 0 48px;
  border-bottom:1px solid var(--line);
  background-image:
    linear-gradient(112deg, rgba(14,10,27,.95) 0%, rgba(14,10,27,.82) 46%, rgba(14,10,27,.58) 100%),
    url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(180deg, rgba(43,227,196,.05) 0 1px, transparent 1px 5px);
  opacity:.45;
}
.page-hero .container{position:relative;z-index:2;}
@media (min-width:1024px){.page-hero{padding:76px 0 64px;min-height:280px;display:flex;align-items:center;}}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-500);margin-bottom:18px;flex-wrap:wrap;}
.crumbs a{color:var(--text-300);}
.crumbs a:hover{color:var(--brand-500);}
.crumbs .current{color:var(--text-500);}
.hero-sub{margin-top:16px;font-size:16px;color:var(--text-300);max-width:620px;}
.hero-actions{display:flex;align-items:center;gap:20px;margin-top:28px;flex-wrap:wrap;}

/* ======= 排版 ======= */
.h1{font-size:28px;line-height:1.2;font-weight:800;letter-spacing:0;}
.h2{font-size:24px;line-height:1.32;font-weight:700;}
.h3{font-size:18px;line-height:1.5;font-weight:700;}
@media (min-width:1024px){
  .h1{font-size:42px;line-height:1.15;}
  .h2{font-size:30px;}
  .h3{font-size:19px;}
}
.section{padding:64px 0;}
@media (min-width:1024px){.section{padding:96px 0;}}
.sec-head{max-width:720px;margin-bottom:36px;}
.sec-head .h2{position:relative;padding-left:16px;}
.sec-head .h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand-500),var(--violet-500));
}
.sec-desc{margin-top:14px;color:var(--text-300);font-size:15px;}
.card-index{
  display:inline-block;font-size:12px;font-weight:800;letter-spacing:1.6px;
  color:var(--brand-500);margin-bottom:12px;
}

/* ======= 数据条 ======= */
.stats-band{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(30,23,56,.72),rgba(14,10,27,.5));
  padding:36px 0;
}
@media (min-width:1024px){.stats-band{padding:44px 0;}}
.stats{display:grid;grid-template-columns:1fr;gap:24px;}
@media (min-width:640px){.stats{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.stats{grid-template-columns:repeat(4,1fr);gap:20px;}}
.stat{padding:4px 0 4px 18px;border-left:2px solid rgba(43,227,196,.35);}
.stat-num{display:block;font-size:32px;font-weight:800;line-height:1.1;color:var(--brand-500);}
.stat:nth-child(2n) .stat-num{color:var(--accent-500);}
.stat-unit{font-size:14px;font-weight:600;margin-left:4px;color:var(--text-300);}
.stat p{margin-top:8px;font-size:13px;color:var(--text-300);line-height:1.7;}

/* ======= Bento 网格 ======= */
.bento{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:640px){.bento{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.bento{grid-template-columns:repeat(3,1fr);grid-auto-rows:minmax(170px,auto);}}
.bento-card{
  background:var(--ink-900);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  padding:24px;
  display:flex;flex-direction:column;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.bento-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);}
.bento-card p{color:var(--text-300);font-size:14.5px;margin-top:10px;}
@media (min-width:1024px){
  .bento-main{grid-column:span 2;grid-row:span 2;padding:28px;}
  .bento-wide{grid-column:span 2;}
}
.bento-main img{
  margin-top:20px;border-radius:var(--r-md);aspect-ratio:16/10;object-fit:cover;
  box-shadow:0 0 0 1px rgba(43,227,196,.14);
}
.dot-list{margin-top:16px;display:flex;flex-direction:column;gap:9px;}
.dot-list li{position:relative;padding-left:18px;font-size:14px;color:var(--text-300);line-height:1.8;}
.dot-list li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;
  background:var(--brand-500);box-shadow:0 0 0 3px rgba(43,227,196,.16);
}
.link-more{
  margin-top:auto;padding-top:18px;font-size:13.5px;font-weight:600;color:var(--brand-500);
  display:inline-flex;align-items:center;gap:6px;
}
.link-more::after{content:"→";transition:transform .2s var(--ease);}
.link-more:hover{color:#7DF3E1;}
.link-more:hover::after{transform:translateX(4px);}

/* ======= 时间轴 ======= */
.timeline{position:relative;display:flex;flex-direction:column;gap:0;max-width:860px;}
.timeline li{position:relative;padding:0 0 32px 60px;}
.timeline li:last-child{padding-bottom:0;}
.timeline li::before{
  content:"";position:absolute;left:19px;top:44px;bottom:-4px;width:2px;
  background:linear-gradient(180deg,rgba(43,227,196,.6),rgba(124,92,255,.25));
}
.timeline li:last-child::before{display:none;}
.tl-dot{
  position:absolute;left:0;top:0;width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:800;letter-spacing:.5px;color:#0E0A1B;
  background:linear-gradient(140deg,var(--brand-500),var(--brand-600));
  box-shadow:0 0 0 1px rgba(43,227,196,.4),0 12px 24px -14px rgba(43,227,196,.8);
}
.tl-body p{margin-top:8px;color:var(--text-300);font-size:14.5px;max-width:680px;}

/* ======= 对照区 ======= */
.compare{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:768px){.compare{grid-template-columns:repeat(2,1fr);gap:24px;}}
.compare-col{
  border-radius:var(--r-lg);padding:26px 24px;
  background:var(--ink-900);box-shadow:var(--shadow-card);
}
.compare-good{border-top:3px solid var(--brand-500);}
.compare-bad{border-top:3px solid var(--accent-500);}
.compare-col .h3{margin-bottom:16px;}
.check-list,.warn-list{display:flex;flex-direction:column;gap:12px;}
.check-list li,.warn-list li{
  position:relative;padding-left:22px;font-size:14.5px;color:var(--text-300);line-height:1.8;
}
.check-list li::before{
  content:"✓";position:absolute;left:0;top:0;color:var(--brand-500);font-weight:800;font-size:13px;
}
.warn-list li::before{
  content:"!";position:absolute;left:2px;top:0;color:var(--accent-500);font-weight:800;font-size:13px;
}

/* ======= 场景卡片 ======= */
.scene-track{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:640px){.scene-track{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.scene-track{grid-template-columns:repeat(3,1fr);gap:24px;}}
.scene-card{
  background:var(--ink-900);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--shadow-card);display:flex;flex-direction:column;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);}
.scene-card img{aspect-ratio:16/10;object-fit:cover;width:100%;}
.scene-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;}
.scene-body p{margin-top:10px;color:var(--text-300);font-size:14.5px;}
.scene-points{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.scene-points li{font-size:13.5px;color:var(--text-500);padding-left:14px;position:relative;}
.scene-points li::before{
  content:"";position:absolute;left:0;top:10px;width:5px;height:5px;border-radius:50%;background:var(--violet-500);
}

/* ======= FAQ ======= */
.faq-layout{display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:1024px){.faq-layout{grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start;}}
.faq-list{margin-top:26px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;padding:15px 0;font-size:16px;font-weight:600;color:var(--text-100);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";flex:0 0 auto;font-size:20px;font-weight:700;line-height:1;color:var(--brand-500);
  transition:transform .2s var(--ease);
}
.faq-item summary:hover{color:var(--brand-500);}
.faq-item[open] summary{color:var(--brand-500);}
.faq-item[open] summary::after{content:"−";}
.faq-body{padding:0 0 18px;color:var(--text-300);font-size:14.5px;line-height:1.85;}
.faq-side{
  background:var(--ink-900);border-radius:var(--r-lg);padding:24px;box-shadow:var(--shadow-card);
}
.side-links{margin-top:16px;display:flex;flex-direction:column;gap:4px;}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 14px;border-radius:var(--r-sm);font-size:14px;color:var(--text-300);
}
.side-links a::after{content:"›";color:var(--text-500);font-size:16px;}
.side-links a:hover{background:rgba(43,227,196,.1);color:var(--brand-500);}
.side-links a:hover::after{color:var(--brand-500);}

/* ======= CTA + 表单 ======= */
.cta-panel{
  border-radius:20px;padding:1px;
  background:linear-gradient(135deg,rgba(43,227,196,.7),rgba(124,92,255,.35) 48%,rgba(255,122,69,.55));
}
.cta-inner{
  border-radius:19px;padding:34px 22px;
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(43,227,196,.12), transparent 55%),
    radial-gradient(120% 140% at 100% 100%, rgba(124,92,255,.14), transparent 55%),
    var(--ink-900);
  display:grid;grid-template-columns:1fr;gap:32px;
}
@media (min-width:768px){.cta-inner{padding:40px 36px;}}
@media (min-width:1024px){.cta-inner{grid-template-columns:1.05fr 1fr;gap:48px;align-items:start;}}
.cta-copy p{margin-top:14px;color:var(--text-300);font-size:15px;max-width:520px;}
.cta-points{margin-top:22px;display:flex;flex-direction:column;gap:10px;}
.cta-points li{position:relative;padding-left:18px;font-size:14px;color:var(--text-300);}
.cta-points li::before{
  content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:3px;
  background:var(--brand-500);transform:rotate(45deg);
}
.apply-form{display:flex;flex-direction:column;gap:18px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:13.5px;font-weight:600;color:var(--text-300);}
.field input,.field textarea{
  width:100%;min-height:46px;padding:11px 14px;border-radius:var(--r-sm);
  background:var(--ink-800);border:1px solid var(--line);color:var(--text-100);
  font-size:14.5px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{min-height:110px;resize:vertical;line-height:1.8;}
.field input::placeholder,.field textarea::placeholder{color:var(--text-500);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(43,227,196,.16);
}
.form-hint{font-size:13px;color:var(--text-500);}
.form-tip{
  display:none;font-size:13.5px;color:var(--brand-500);
  border-left:3px solid var(--brand-500);padding:8px 12px;background:rgba(43,227,196,.08);border-radius:0 var(--r-sm) var(--r-sm) 0;
}
.form-tip.show{display:block;}

/* ======= 页脚 ======= */
.footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(21,16,42,.9),rgba(14,10,27,1));
  padding:56px 0 28px;margin-top:8px;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.footer p{font-size:13.5px;color:var(--text-300);line-height:1.85;max-width:360px;}
.footer h4{font-size:14px;font-weight:600;color:var(--text-100);margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--text-300);}
.footer-links a:hover{color:var(--brand-500);}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:12.5px;color:var(--text-500);
}

/* ======= 平板侧栏 ======= */
@media (min-width:640px) and (max-width:1023px){
  body{padding-left:72px;}
  .sidebar{width:72px;padding:18px 10px;align-items:center;}
  .logo{justify-content:center;gap:0;}
  .logo-text{display:none;}
  .nav{width:100%;align-items:center;}
  .nav-title{display:none;}
  .nav-item{width:44px;justify-content:center;padding:0;margin:0 auto;}
  .nav-text{display:none;}
  .nav-abbr{display:inline-block;}
  .sidebar-cta{width:44px;min-height:44px;padding:0;justify-content:center;}
  .sidebar-cta .cta-text{display:none;}
  .sidebar-cta .cta-icon{display:inline;font-size:16px;}
  .sidebar-extra,.sidebar-copy{display:none;}
}

/* ======= 桌面侧栏 ======= */
@media (min-width:1024px){
  body{padding-left:240px;}
  .nav-abbr{display:none;}
}

/* ======= 移动端抽屉 ======= */
@media (max-width:639px){
  body{padding-left:0;}
  .topbar{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    position:sticky;top:0;z-index:70;height:56px;padding:0 16px;
    background:rgba(21,16,42,.94);
    border-bottom:1px solid var(--line);
    backdrop-filter:blur(10px);
  }
  .topbar .logo{gap:10px;}
  .topbar .logo-mark{width:34px;height:34px;font-size:12px;border-radius:10px;}
  .topbar .logo-main{font-size:13px;}
  .topbar .logo-sub{display:none;}
  .menu-btn{
    display:inline-flex;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:var(--r-sm);
    background:rgba(43,227,196,.1);border:1px solid rgba(43,227,196,.3);color:var(--brand-500);
    cursor:pointer;font-size:18px;line-height:1;
  }
  .menu-btn:hover{background:rgba(43,227,196,.18);}
  .overlay{display:block;}
  .sidebar{
    left:auto;right:0;width:82vw;max-width:340px;
    border-right:0;border-left:1px solid var(--line);
    transform:translateX(100%);
    transition:transform .28s var(--ease);
    z-index:90;padding:20px 16px;
    box-shadow:-24px 0 60px -30px rgba(0,0,0,.95);
  }
  .sidebar.open{transform:translateX(0);}
  .sidebar .logo-text{display:flex;}
  .sidebar .nav-text{display:inline;}
  .sidebar .nav-abbr{display:none;}
  .timeline li{padding-left:52px;}
  .page-hero{padding:40px 0 36px;}
}

/* ======= 减弱动效 ======= */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category3 */
:root{
  --ink-950:#0E0A1B;
  --ink-900:#15102A;
  --ink-800:#1E1738;
  --line:#2E2650;
  --brand-500:#2BE3C4;
  --brand-600:#14BFA4;
  --accent-500:#FF7A45;
  --violet-500:#7C5CFF;
  --text-100:#F2F0FA;
  --text-300:#B9B2D6;
  --text-500:#7E769E;
  --paper:#FBFAFF;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-card:0 1px 0 rgba(43,227,196,.10) inset, 0 24px 44px rgba(0,0,0,.38);
  --shadow-card-hover:0 1px 0 rgba(43,227,196,.22) inset, 0 30px 56px rgba(0,0,0,.48);
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}

html{scroll-behavior:smooth;}

body{
  margin:0;
  background:var(--ink-950);
  color:var(--text-100);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%;display:block;}

a{color:var(--brand-500);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:#6BF3DC;}

button{font-family:inherit;}

:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px;}

::selection{background:rgba(43,227,196,.28);color:#fff;}

.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 40px;
}

/* ---------- 侧栏骨架 ---------- */
.sidebar{
  position:fixed;
  left:0;top:0;bottom:0;
  width:240px;
  background:var(--ink-900);
  border-right:1px solid var(--line);
  padding:24px 16px 20px;
  display:flex;
  flex-direction:column;
  gap:4px;
  z-index:60;
  overflow-y:auto;
}

.layout{
  margin-left:240px;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

.logo{
  display:flex;
  align-items:center;
  gap:12px;
  padding:6px 10px 20px;
  color:var(--text-100);
}
.logo:hover{color:var(--text-100);}

.logo-mark{
  flex:0 0 auto;
  width:40px;height:40px;
  display:inline-flex;
  align-items:center;justify-content:center;
  border-radius:12px;
  background:linear-gradient(140deg,var(--brand-500),var(--brand-600));
  color:#06231E;
  font-weight:800;
  font-size:15px;
  letter-spacing:.02em;
  box-shadow:0 8px 20px rgba(43,227,196,.28);
}

.logo-text{display:flex;flex-direction:column;line-height:1.25;}
.logo-line{font-size:15px;font-weight:800;color:var(--text-100);}
.logo-sub{font-size:12px;font-weight:500;color:var(--text-500);}

.nav{display:flex;flex-direction:column;gap:4px;}

.nav-title{
  font-size:12px;
  font-weight:600;
  color:var(--text-500);
  padding:6px 12px 6px 16px;
  letter-spacing:.02em;
}

.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 14px 0 16px;
  border-radius:var(--radius-sm);
  color:var(--text-300);
  font-size:14px;
  font-weight:500;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-item:hover{
  background:rgba(43,227,196,.08);
  color:var(--text-100);
}
.nav-item.active{
  background:rgba(43,227,196,.12);
  color:var(--brand-500);
  font-weight:700;
}
.nav-item.active::before{
  content:"";
  position:absolute;
  left:0;top:10px;bottom:10px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--brand-500);
}
.nav-abbr{display:none;}

.sidebar-cta{
  margin-top:18px;
  width:100%;
}

.sidebar-divider{
  height:1px;
  background:var(--line);
  margin:18px 4px 12px;
}

.sidebar-minor{display:flex;flex-direction:column;gap:2px;}
.sidebar-minor a{
  display:flex;
  align-items:center;
  min-height:38px;
  padding:0 14px;
  border-radius:var(--radius-sm);
  font-size:13px;
  color:var(--text-500);
}
.sidebar-minor a:hover{color:var(--brand-500);background:rgba(43,227,196,.07);}

.sidebar-foot{
  margin-top:auto;
  padding:16px 12px 0;
  font-size:12px;
  color:var(--text-500);
  line-height:1.6;
}

/* ---------- 移动端顶栏与抽屉 ---------- */
.mobile-bar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:56px;
  z-index:80;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  background:rgba(21,16,42,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.mobile-logo{display:flex;align-items:center;gap:10px;color:var(--text-100);}
.mobile-logo:hover{color:var(--text-100);}
.logo-mark-sm{
  width:32px;height:32px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand-500),var(--brand-600));
  color:#06231E;font-weight:800;font-size:13px;
}
.logo-text-sm{font-size:14px;font-weight:700;color:var(--text-100);}

.menu-btn{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:var(--ink-800);
  color:var(--text-100);
  cursor:pointer;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.menu-btn:hover{border-color:rgba(43,227,196,.5);background:rgba(43,227,196,.1);}
.menu-btn:active{transform:scale(.98);}

.drawer-mask{
  position:fixed;inset:0;
  background:rgba(6,4,14,.66);
  opacity:0;visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s var(--ease);
  z-index:90;
}
.drawer-mask.open{opacity:1;visibility:visible;}

.drawer{
  position:fixed;
  top:0;right:0;bottom:0;
  width:82vw;
  max-width:340px;
  background:var(--ink-900);
  border-left:1px solid var(--line);
  padding:22px 18px;
  transform:translateX(102%);
  transition:transform .3s var(--ease);
  z-index:100;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.drawer-close{
  width:40px;height:40px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:var(--ink-800);color:var(--text-100);
  font-size:18px;cursor:pointer;
}
.drawer-close:hover{border-color:rgba(43,227,196,.5);}

/* ---------- 通用组件 ---------- */
.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:0 24px;
  border-radius:var(--radius-sm);
  border:1px solid rgba(255,122,69,.55);
  background:var(--accent-500);
  color:#20100A;
  font-size:15px;
  font-weight:700;
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
  box-shadow:0 14px 30px rgba(255,122,69,.22);
}
.btn-primary:hover{
  background:#FF8F62;
  color:#20100A;
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(255,122,69,.65),0 18px 36px rgba(255,122,69,.34);
}
.btn-primary:active{transform:scale(.98);}
.btn-primary:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:0 22px;
  border-radius:var(--radius-sm);
  border:1px solid rgba(43,227,196,.45);
  background:transparent;
  color:var(--brand-500);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn-ghost:hover{
  background:rgba(43,227,196,.12);
  color:#8CF7E2;
  border-color:rgba(43,227,196,.75);
}
.btn-ghost:active{transform:scale(.98);}

.link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--brand-500);
  border-bottom:2px solid rgba(43,227,196,0);
  padding-bottom:2px;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.link-more:hover{color:#8CF7E2;border-color:rgba(43,227,196,.7);}

.badge{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  background:rgba(124,92,255,.16);
  border:1px solid rgba(124,92,255,.34);
  color:#B9A9FF;
}
.badge-brand{
  background:rgba(43,227,196,.13);
  border-color:rgba(43,227,196,.34);
  color:#7FF3DE;
}
.badge-accent{
  background:rgba(255,122,69,.14);
  border-color:rgba(255,122,69,.36);
  color:#FFA57C;
}

.card{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:20px;
  box-shadow:var(--shadow-card);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(43,227,196,.45);
  box-shadow:var(--shadow-card-hover);
}

.card-cover{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--radius-md);
  border:1px solid var(--line);
}

.section{padding:72px 0;}
.section-alt{background:var(--ink-900);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:700;
  color:var(--brand-500);
  letter-spacing:.06em;
}
.eyebrow::before{
  content:"";
  width:20px;height:2px;
  border-radius:2px;
  background:var(--brand-500);
}

.sec-title{
  font-size:clamp(24px,2.6vw,31px);
  line-height:1.3;
  font-weight:800;
  margin:14px 0 12px;
  color:var(--text-100);
}
.sec-desc{
  font-size:15px;
  color:var(--text-300);
  max-width:720px;
  margin:0;
}

.h1-title{
  font-size:clamp(28px,4vw,42px);
  line-height:1.18;
  font-weight:800;
  margin:16px 0 18px;
  color:var(--text-100);
}
.lead{
  font-size:16px;
  line-height:1.9;
  color:var(--text-300);
  margin:0 0 26px;
  max-width:560px;
}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding:64px 0 72px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(43,227,196,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(43,227,196,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse at 70% 30%,#000 10%,transparent 72%);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:48px;
  align-items:center;
}
.hero-media{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid rgba(43,227,196,.26);
  box-shadow:0 30px 60px rgba(0,0,0,.5);
  aspect-ratio:16/10;
}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(14,10,27,.12),rgba(14,10,27,.72)),
             linear-gradient(rgba(43,227,196,.06) 1px,transparent 1px),
             linear-gradient(90deg,rgba(43,227,196,.06) 1px,transparent 1px);
  background-size:auto,32px 32px,32px 32px;
}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px;}

/* ---------- 数据条 ---------- */
.stats{
  background:var(--ink-900);
  border-bottom:1px solid var(--line);
  padding:34px 0;
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}
.stat{position:relative;padding-left:18px;}
.stat::before{
  content:"";
  position:absolute;
  left:0;top:6px;bottom:6px;
  width:2px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--brand-500),rgba(43,227,196,0));
}
.stat-num{
  font-size:clamp(26px,3vw,34px);
  font-weight:800;
  line-height:1.1;
  color:var(--brand-500);
  display:flex;
  align-items:baseline;
  gap:6px;
}
.stat-num span{font-size:13px;font-weight:600;color:var(--text-500);}
.stat-label{font-size:13px;color:var(--text-300);margin-top:8px;}

/* ---------- 功能模块 ---------- */
.module-grid{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:40px;
  align-items:start;
  margin-top:40px;
}
.module-list{display:flex;flex-direction:column;gap:16px;}
.module-item{
  display:grid;
  grid-template-columns:56px 1fr;
  gap:18px;
  padding:20px;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:var(--ink-900);
  transition:border-color .2s var(--ease),transform .2s var(--ease),background .2s var(--ease);
}
.module-item:hover{
  border-color:rgba(43,227,196,.42);
  background:var(--ink-800);
  transform:translateY(-4px);
}
.module-num{
  font-size:22px;
  font-weight:800;
  color:var(--brand-500);
  line-height:1.2;
  letter-spacing:.02em;
}
.module-name{font-size:18px;font-weight:700;color:var(--text-100);margin:0 0 8px;}
.module-text{font-size:14px;color:var(--text-300);margin:0;}
.point-list{
  list-style:none;
  margin:14px 0 0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:7px;
}
.point-list li{
  position:relative;
  padding-left:16px;
  font-size:13px;
  color:var(--text-500);
  line-height:1.7;
}
.point-list li::before{
  content:"";
  position:absolute;
  left:0;top:9px;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--brand-500);
  opacity:.8;
}

.stagger{display:flex;flex-direction:column;gap:24px;}
.stagger-card{background:var(--ink-800);}
.stagger-card .card-cover{margin-bottom:16px;}
.card-title{font-size:18px;font-weight:700;color:var(--text-100);margin:12px 0 8px;line-height:1.45;}
.card-text{font-size:14px;color:var(--text-300);margin:0 0 14px;line-height:1.8;}
.card-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:12px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-500);
}

/* ---------- 场景卡片带 ---------- */
.scene-track{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
  margin-top:40px;
}
.scene-card{
  display:flex;
  flex-direction:column;
  scroll-snap-align:start;
}
.scene-card .card-cover{margin-bottom:16px;}
.scene-name{font-size:18px;font-weight:700;color:var(--text-100);margin:0 0 8px;}
.scene-desc{font-size:14px;color:var(--text-300);margin:0;}

/* ---------- 长文纸面 ---------- */
.paper{
  background:var(--paper);
  color:#1A1330;
  border-radius:20px;
  padding:40px;
  max-width:820px;
  box-shadow:0 30px 60px rgba(0,0,0,.42);
}
.paper h2{
  font-size:clamp(20px,2.2vw,25px);
  font-weight:800;
  color:#161029;
  margin:0 0 20px;
  padding-left:14px;
  border-left:4px solid var(--brand-600);
  line-height:1.4;
}
.paper h3{
  font-size:17px;
  font-weight:700;
  color:#1A1330;
  margin:28px 0 10px;
}
.paper p{
  font-size:15.5px;
  line-height:1.9;
  color:#3B3457;
  margin:0 0 18px;
}
.paper .note{
  border-left:3px solid var(--brand-600);
  background:rgba(43,227,196,.09);
  padding:14px 18px;
  border-radius:0 10px 10px 0;
  color:#2A2444;
  font-size:15px;
}

/* ---------- FAQ ---------- */
.faq-wrap{margin-top:36px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  min-height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:12px 4px;
  background:none;
  border:0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--text-100);
  cursor:pointer;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand-500);}
.faq-item.open .faq-q{color:var(--brand-500);}
.faq-icon{
  flex:0 0 auto;
  width:26px;height:26px;
  border-radius:8px;
  border:1px solid var(--line);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:15px;
  color:var(--brand-500);
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.faq-item.open .faq-icon{background:rgba(43,227,196,.14);border-color:rgba(43,227,196,.5);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s var(--ease);
}
.faq-a-inner{
  padding:0 44px 18px 4px;
  font-size:14.5px;
  line-height:1.85;
  color:var(--text-300);
}
.faq-item.open .faq-a{max-height:400px;}

/* ---------- 相关分类 / CTA ---------- */
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
  margin-top:36px;
}
.cta-banner{
  position:relative;
  border-radius:20px;
  padding:44px;
  background:linear-gradient(135deg,rgba(43,227,196,.14),rgba(124,92,255,.12) 55%,rgba(255,122,69,.14));
  border:1px solid rgba(43,227,196,.34);
  overflow:hidden;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:26px;
}
.cta-banner::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:100% 44px;
  pointer-events:none;
}
.cta-banner h2{
  position:relative;
  z-index:1;
  font-size:clamp(21px,2.4vw,27px);
  font-weight:800;
  margin:0 0 10px;
  color:var(--text-100);
}
.cta-banner p{
  position:relative;
  z-index:1;
  margin:0;
  font-size:15px;
  color:var(--text-300);
  max-width:620px;
}
.cta-banner .btn-primary{position:relative;z-index:1;}

/* ---------- 表单 ---------- */
.form-panel{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:28px;
  box-shadow:var(--shadow-card);
}
.form-row{margin-bottom:18px;}
.form-label{display:block;font-size:13px;font-weight:600;color:var(--text-300);margin-bottom:8px;}
.form-input,.form-textarea{
  width:100%;
  min-height:46px;
  padding:10px 14px;
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:var(--ink-900);
  color:var(--text-100);
  font-size:14px;
  font-family:inherit;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.form-textarea{min-height:110px;resize:vertical;line-height:1.8;}
.form-input::placeholder,.form-textarea::placeholder{color:var(--text-500);}
.form-input:focus,.form-textarea:focus{
  outline:none;
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(43,227,196,.16);
}
.form-error{
  margin-top:8px;
  font-size:13px;
  color:var(--accent-500);
  padding-left:10px;
  border-left:2px solid var(--accent-500);
}
.form-actions{display:flex;justify-content:flex-end;margin-top:8px;}

/* ---------- 页脚 ---------- */
.footer{
  background:var(--ink-900);
  border-top:1px solid var(--line);
  padding:56px 0 28px;
  margin-top:auto;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:34px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-grid p{font-size:13.5px;color:var(--text-500);line-height:1.85;margin:0;}
.footer-grid h4{
  font-size:14px;
  font-weight:600;
  color:var(--text-100);
  margin:0 0 14px;
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{
  font-size:14px;
  color:var(--text-300);
}
.footer-links a:hover{color:var(--brand-500);}
.footer-bottom{
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:var(--text-500);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 32px;}
}

@media (max-width:1023px){
  .sidebar{
    width:72px;
    padding:20px 10px 16px;
    align-items:center;
  }
  .logo{padding:4px 0 18px;justify-content:center;}
  .logo-text{display:none;}
  .nav{width:100%;}
  .nav-title{display:none;}
  .nav-item{padding:0;justify-content:center;}
  .nav-text{display:none;}
  .nav-abbr{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:36px;height:36px;
    border-radius:10px;
    font-size:14px;
    font-weight:700;
  }
  .nav-item.active::before{left:-10px;}
  .sidebar-cta{padding:0;min-height:44px;font-size:13px;}
  .sidebar-cta .cta-text{display:none;}
  .sidebar-cta .cta-abbr{display:inline;}
  .sidebar-minor{width:100%;}
  .sidebar-minor a{justify-content:center;padding:0;font-size:12px;}
  .sidebar-foot{display:none;}
  .layout{margin-left:72px;}

  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-media{order:2;}
  .module-grid{grid-template-columns:1fr;gap:28px;}
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .scene-track{
    grid-auto-flow:column;
    grid-auto-columns:minmax(280px,1fr);
    grid-template-columns:none;
    overflow-x:auto;
    padding-bottom:10px;
    scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;
  }
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}

@media (max-width:639px){
  .sidebar{display:none;}
  .mobile-bar{display:flex;}
  .layout{margin-left:0;padding-top:56px;}

  .container{padding:0 20px;}
  .section{padding:52px 0;}
  .hero{padding:40px 0 52px;}
  .h1-title{font-size:28px;}
  .lead{font-size:15px;}
  .stats-grid{grid-template-columns:1fr;gap:18px;}
  .scene-track{
    grid-auto-flow:row;
    grid-auto-columns:auto;
    overflow:visible;
    gap:20px;
  }
  .related-grid{grid-template-columns:1fr;}
  .paper{padding:24px;border-radius:16px;}
  .cta-banner{padding:28px 22px;}
  .cta-banner .btn-primary{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .btn-primary,.btn-ghost{min-height:46px;width:100%;}
  .hero-actions .link-more{width:auto;}
  .form-actions{justify-content:stretch;}
  .form-actions .btn-primary{width:100%;}
}

.cta-abbr{display:none;}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}

/* roulang page: category4 */
:root{
  --ink-950:#0E0A1B;
  --ink-900:#15102A;
  --ink-800:#1E1738;
  --line:#2E2650;
  --brand-500:#2BE3C4;
  --brand-600:#14BFA4;
  --accent-500:#FF7A45;
  --violet-500:#7C5CFF;
  --text-100:#F2F0FA;
  --text-300:#B9B2D6;
  --text-500:#7E769E;
  --paper:#FBFAFF;
  --radius-card:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --shadow-card:0 0 0 1px rgba(43,227,196,.14), 0 24px 48px -26px rgba(0,0,0,.85);
  --shadow-soft:0 0 0 1px rgba(255,255,255,.04), 0 18px 40px -24px rgba(0,0,0,.7);
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  background:var(--ink-950);
  color:var(--text-300);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:15px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{color:var(--text-100);font-weight:700;line-height:1.25;margin:0;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand-500);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:#7CF2DD;}
button{font-family:inherit;}
ul,ol{margin:0;padding-left:1.2em;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px;}

.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 40px;
}

/* ============ 左侧 App Shell ============ */
.shell-sidebar{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:240px;
  background:var(--ink-900);
  border-right:1px solid var(--line);
  z-index:60;
  overflow-y:auto;
  overflow-x:hidden;
}
.sidebar-inner{
  display:flex;
  flex-direction:column;
  gap:18px;
  min-height:100%;
  padding:22px 16px 26px;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
}
.logo:hover{color:var(--brand-500);}
.logo-mark{
  width:38px;
  height:38px;
  flex:none;
  border-radius:11px;
  display:grid;
  place-items:center;
  font-size:14px;
  font-weight:800;
  color:#06121A;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-600));
  box-shadow:0 0 0 1px rgba(43,227,196,.4),0 10px 24px -12px rgba(43,227,196,.8);
}
.logo-text{display:flex;flex-direction:column;line-height:1.3;min-width:0;}
.logo-line1{font-size:13px;font-weight:700;color:var(--text-100);letter-spacing:.01em;}
.logo-line2{font-size:11px;color:var(--text-500);}

.nav{display:flex;flex-direction:column;gap:4px;}
.nav-title{
  font-size:11px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--text-500);
  padding:0 16px 6px;
}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  height:44px;
  padding:0 16px;
  border-radius:10px;
  font-size:14px;
  color:var(--text-300);
  text-decoration:none;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-item:hover{background:rgba(43,227,196,.08);color:var(--text-100);}
.nav-item.active{
  background:rgba(43,227,196,.12);
  color:var(--brand-500);
  font-weight:600;
}
.nav-item.active::before{
  content:"";
  position:absolute;
  left:0;
  top:10px;
  bottom:10px;
  width:3px;
  border-radius:3px;
  background:var(--brand-500);
}
.nav-abbr{display:none;}

.sidebar-cta{width:100%;margin-top:2px;}
.sidebar-cta .cta-icon{display:none;}
.sidebar-divider{height:1px;background:var(--line);margin:6px 0;}
.sidebar-sub{display:flex;flex-direction:column;gap:8px;padding:0 4px;}
.sidebar-sub a{
  font-size:13px;
  color:var(--text-500);
  text-decoration:none;
}
.sidebar-sub a:hover{color:var(--brand-500);}
.sidebar-copy{
  margin-top:auto;
  font-size:11px;
  line-height:1.7;
  color:var(--text-500);
}

.shell-main{
  margin-left:240px;
  min-height:100vh;
  background:var(--ink-950);
}

/* ============ 移动端顶栏与抽屉 ============ */
.topbar{
  display:none;
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:56px;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  background:rgba(21,16,42,.97);
  border-bottom:1px solid var(--line);
  z-index:70;
  backdrop-filter:blur(10px);
}
.topbar-logo{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:700;
  color:var(--text-100);
  text-decoration:none;
}
.topbar-logo:hover{color:var(--brand-500);}
.topbar-logo .logo-mark{width:30px;height:30px;border-radius:9px;font-size:12px;}
.menu-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:38px;
  padding:0 14px;
  border-radius:9px;
  border:1px solid rgba(43,227,196,.45);
  background:transparent;
  color:var(--brand-500);
  font-size:13px;
  font-weight:600;
  cursor:pointer;
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.menu-btn:hover{background:rgba(43,227,196,.1);border-color:var(--brand-500);}
.menu-btn:active{transform:scale(.97);}

.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.62);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease);
  z-index:80;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  display:none;
  position:fixed;
  top:0;
  right:0;
  bottom:0;
  width:82vw;
  max-width:340px;
  background:var(--ink-900);
  border-left:1px solid var(--line);
  padding:20px 18px;
  overflow-y:auto;
  transform:translateX(100%);
  transition:transform .28s var(--ease);
  z-index:90;
}
.drawer.open{transform:translateX(0);}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:18px;
}
.drawer-head strong{font-size:13px;color:var(--text-100);}
.drawer-close{
  width:36px;
  height:36px;
  border-radius:9px;
  border:1px solid var(--line);
  background:transparent;
  color:var(--text-300);
  font-size:15px;
  cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.drawer-close:hover{color:var(--brand-500);border-color:rgba(43,227,196,.5);}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  text-decoration:none;
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),transform .15s var(--ease),border-color .2s var(--ease);
}
.btn-primary{
  background:var(--accent-500);
  color:#1A0C05;
  box-shadow:0 14px 30px -16px rgba(255,122,69,.95);
}
.btn-primary:hover{background:#FF8E60;color:#1A0C05;box-shadow:0 18px 38px -14px rgba(255,122,69,1);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  background:transparent;
  border-color:rgba(43,227,196,.5);
  color:var(--brand-500);
}
.btn-ghost:hover{background:rgba(43,227,196,.1);border-color:var(--brand-500);color:#8CF5E2;}
.btn-ghost:active{transform:scale(.98);}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

.btn-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--brand-500);
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  border-bottom:2px solid transparent;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.btn-link:hover{color:#8CF5E2;border-color:#8CF5E2;}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  background:rgba(124,92,255,.16);
  color:#C0AFFF;
  border:1px solid rgba(124,92,255,.32);
}
.badge-brand{background:rgba(43,227,196,.14);color:var(--brand-500);border-color:rgba(43,227,196,.32);}
.badge-accent{background:rgba(255,122,69,.14);color:#FFA47C;border-color:rgba(255,122,69,.32);}

.section{padding:60px 0;}
.section-tight{padding:44px 0;}
.section-head{max-width:760px;margin-bottom:32px;}
.section-head h2{font-size:clamp(24px,3vw,30px);letter-spacing:-.01em;margin-bottom:12px;}
.section-head p{font-size:15px;color:var(--text-300);margin:0;}
.kicker{
  display:inline-block;
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--brand-500);
  margin-bottom:12px;
}

/* ============ 页头横幅 ============ */
.page-head{
  position:relative;
  min-height:210px;
  display:flex;
  align-items:flex-end;
  background:#0B0817 url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-head::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(11,8,23,.97) 0%,rgba(11,8,23,.88) 48%,rgba(11,8,23,.66) 100%);
}
.page-head::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:52px 52px;
  opacity:.5;
}
.page-head-inner{position:relative;z-index:2;width:100%;padding:34px 0 30px;}
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-500);
  margin-bottom:16px;
}
.crumbs a{color:var(--text-300);text-decoration:none;}
.crumbs a:hover{color:var(--brand-500);}
.crumbs .sep{color:var(--text-500);}
.crumbs .current{color:var(--text-500);}
.page-head h1{
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.18;
  letter-spacing:-.01em;
  margin:14px 0 12px;
}
.page-head .lead{
  max-width:720px;
  font-size:15px;
  line-height:1.9;
  color:var(--text-300);
  margin:0;
}

/* ============ 步骤条 ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.step{
  position:relative;
  background:var(--ink-900);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px 22px;
  box-shadow:var(--shadow-soft);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.step:hover{transform:translateY(-4px);border-color:rgba(43,227,196,.45);}
.step-num{
  display:block;
  font-size:24px;
  font-weight:800;
  color:var(--brand-500);
  letter-spacing:.04em;
  margin-bottom:10px;
}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--text-300);margin:0;}

/* ============ FAQ 区 ============ */
.faq-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:32px;
  align-items:start;
}
.faq-list{
  background:var(--ink-900);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-soft);
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:none;}
.faq-q{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:56px;
  padding:14px 22px;
  font-size:16px;
  font-weight:600;
  color:var(--text-100);
  cursor:pointer;
  list-style:none;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q:hover{color:var(--brand-500);background:rgba(43,227,196,.04);}
.faq-item[open] .faq-q{color:var(--brand-500);}
.faq-icon{position:relative;width:18px;height:18px;flex:none;color:currentColor;}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:currentColor;
  border-radius:2px;
  transition:transform .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[open] .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{
  padding:0 22px 18px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-300);
}
.faq-a strong{color:var(--text-100);font-weight:600;}

.side-stack{display:flex;flex-direction:column;gap:20px;position:sticky;top:24px;}
.side-card{
  background:var(--ink-900);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:22px;
  box-shadow:var(--shadow-soft);
}
.side-card h3{font-size:16px;margin-bottom:6px;}
.side-card .side-note{font-size:13px;color:var(--text-500);margin:0 0 16px;}
.link-list{display:flex;flex-direction:column;gap:10px;}
.link-list a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:13px 14px;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--ink-800);
  color:var(--text-100);
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  transition:border-color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease);
}
.link-list a:hover{border-color:rgba(43,227,196,.5);background:rgba(43,227,196,.08);color:var(--brand-500);transform:translateX(2px);}
.link-list a span{font-size:13px;color:var(--text-500);font-weight:400;}
.link-list a:hover span{color:var(--text-300);}

/* ============ 延伸阅读卡 ============ */
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.card{
  display:flex;
  flex-direction:column;
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  text-decoration:none;
  color:inherit;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(43,227,196,.45);box-shadow:var(--shadow-card);}
.card-cover{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--ink-900);}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.card:hover .card-cover img{transform:scale(1.04);}
.card-cover::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(14,10,27,0) 40%,rgba(14,10,27,.72) 100%);
}
.card-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card-body h3{
  font-size:18px;
  line-height:1.4;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-body p{
  font-size:14px;
  color:var(--text-300);
  margin:0;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-meta{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:12px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-500);
}
.card-meta .go{color:var(--brand-500);font-weight:600;}
.card:hover .card-meta .go{color:#8CF5E2;}

/* ============ CTA 横幅 ============ */
.cta-band{
  position:relative;
  border-radius:20px;
  padding:44px;
  background:linear-gradient(135deg,rgba(43,227,196,.14),rgba(124,92,255,.14) 60%,rgba(255,122,69,.1));
  border:1px solid rgba(43,227,196,.3);
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:44px 44px;
  opacity:.5;
  pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.cta-inner h2{font-size:clamp(22px,2.6vw,28px);margin-bottom:10px;}
.cta-inner p{margin:0;font-size:15px;color:var(--text-300);max-width:640px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 咨询表单 ============ */
.form-card{
  background:var(--ink-900);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px;
  box-shadow:var(--shadow-soft);
}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1 / -1;}
.field label{font-size:13px;font-weight:600;color:var(--text-100);}
.field input,.field select,.field textarea{
  width:100%;
  min-height:46px;
  padding:11px 14px;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--ink-800);
  color:var(--text-100);
  font-size:14px;
  font-family:inherit;
  line-height:1.6;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{min-height:112px;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:var(--text-500);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(43,227,196,.16);
}
.field .hint{font-size:12px;color:var(--text-500);}
.form-error{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:13px;
  color:#FFA47C;
  border-left:3px solid var(--accent-500);
  padding:6px 0 6px 12px;
  background:rgba(255,122,69,.07);
  border-radius:0 8px 8px 0;
}
.form-actions{display:flex;justify-content:flex-end;margin-top:20px;}

/* ============ 页脚 ============ */
.footer{
  background:var(--ink-900);
  border-top:1px solid var(--line);
  padding:56px 0 24px;
  margin-top:24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:32px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer h4{font-size:14px;font-weight:600;color:var(--text-100);margin:0 0 14px;}
.footer p{font-size:14px;line-height:1.85;color:var(--text-500);margin:0;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--text-300);text-decoration:none;}
.footer-links a:hover{color:var(--brand-500);}
.footer-bottom{
  margin-top:36px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-500);
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .container{padding:0 24px;}
  .faq-layout{grid-template-columns:1fr;}
  .side-stack{position:static;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
  .cta-band{padding:32px;}
}

@media (min-width:640px) and (max-width:1023px){
  .shell-sidebar{width:72px;}
  .sidebar-inner{padding:18px 10px;gap:14px;align-items:center;}
  .logo{justify-content:center;}
  .logo-text{display:none;}
  .nav{width:100%;align-items:center;}
  .nav-title{display:none;}
  .nav-item{
    justify-content:center;
    width:52px;
    height:52px;
    padding:0;
  }
  .nav-item.active::before{top:12px;bottom:12px;}
  .nav-text{display:none;}
  .nav-abbr{display:block;font-size:14px;font-weight:700;}
  .sidebar-cta{width:52px;height:52px;padding:0;}
  .sidebar-cta .cta-label{display:none;}
  .sidebar-cta .cta-icon{display:inline;font-size:18px;font-weight:700;}
  .sidebar-divider{width:100%;}
  .sidebar-sub{display:none;}
  .sidebar-copy{display:none;}
  .shell-main{margin-left:72px;}
}

@media (max-width:639px){
  .container{padding:0 20px;}
  .shell-sidebar{display:none;}
  .shell-main{margin-left:0;padding-top:56px;}
  .topbar{display:flex;}
  .drawer{display:block;}
  .page-head{min-height:190px;}
  .page-head-inner{padding:26px 0 24px;}
  .page-head h1{font-size:26px;}
  .section{padding:44px 0;}
  .section-tight{padding:32px 0;}
  .card-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer{padding:40px 0 20px;}
  .form-grid{grid-template-columns:1fr;}
  .form-actions{justify-content:stretch;}
  .form-actions .btn{width:100%;}
  .cta-band{padding:26px 20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .faq-q{font-size:15px;padding:14px 16px;}
  .faq-a{padding:0 16px 16px;}
  .btn{min-height:46px;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}