/* roulang page: index */
:root{
      --bg:#f5f8ff;
      --bg-soft:#eef4ff;
      --surface:#ffffff;
      --surface-2:#f8fbff;
      --text:#17324f;
      --muted:#6c7f98;
      --line:#dce7f6;
      --primary:#2f6bff;
      --primary-2:#5d8dff;
      --primary-soft:#e8f0ff;
      --accent:#49b6e8;
      --shadow:0 18px 42px rgba(42, 79, 160, .12);
      --shadow-soft:0 10px 26px rgba(31, 61, 127, .08);
      --radius:24px;
      --radius-sm:18px;
      --radius-xs:14px;
      --transition: 220ms ease;
      --container: 1180px;
    }
    html{scroll-behavior:smooth}
    *{box-sizing:border-box}
    body{
      margin:0;
      font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(47,107,255,.09), transparent 30%),
        radial-gradient(circle at 85% 10%, rgba(73,182,232,.10), transparent 28%),
        linear-gradient(180deg, #f8fbff 0%, #f3f7fe 100%);
      line-height:1.7;
      padding-bottom:108px;
      min-height:100vh;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none;transition:color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition)}
    a:hover{color:var(--primary)}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    :focus-visible{
      outline:3px solid rgba(47,107,255,.22);
      outline-offset:2px;
    }
    .container, .container-lg, .container-xl{
      max-width:var(--container);
    }
    .site-header{
      position:sticky;
      top:0;
      z-index:1030;
      backdrop-filter:blur(14px);
      background:rgba(245,248,255,.82);
      border-bottom:1px solid rgba(220,231,246,.72);
    }
    .topbar{
      min-height:56px;
    }
    .brand{
      display:inline-flex;
      align-items:center;
      gap:.75rem;
      font-weight:800;
      letter-spacing:-.03em;
      color:var(--text);
      white-space:nowrap;
    }
    .brand:hover{color:var(--text)}
    .brand-badge{
      width:36px;height:36px;border-radius:12px;
      background:linear-gradient(145deg, var(--primary), var(--accent));
      box-shadow:0 10px 22px rgba(47,107,255,.22);
      display:grid;
      place-items:center;
      color:#fff;
      font-weight:800;
      font-size:.9rem;
      flex:0 0 auto;
    }
    .brand-name{
      font-size:1.08rem;
      line-height:1;
    }
    .header-actions{
      display:flex;
      align-items:center;
      gap:.75rem;
      flex-wrap:wrap;
    }
    .chip-nav{
      display:flex;
      align-items:center;
      gap:.6rem;
      overflow-x:auto;
      padding:0 0 .35rem;
      scrollbar-width:none;
      -ms-overflow-style:none;
      scroll-snap-type:x proximity;
    }
    .chip-nav::-webkit-scrollbar{display:none}
    .chip{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      white-space:nowrap;
      height:42px;
      padding:0 1rem;
      border-radius:999px;
      border:1px solid rgba(220,231,246,.95);
      background:rgba(255,255,255,.88);
      color:var(--muted);
      font-size:.95rem;
      font-weight:600;
      scroll-snap-align:start;
      box-shadow:0 4px 14px rgba(32,62,124,.05);
      flex:0 0 auto;
    }
    .chip:hover{
      color:var(--primary);
      border-color:rgba(47,107,255,.20);
      transform:translateY(-1px);
      box-shadow:0 10px 20px rgba(47,107,255,.09);
    }
    .chip.active{
      color:#fff;
      border-color:transparent;
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      box-shadow:0 12px 24px rgba(47,107,255,.20);
    }
    .btn{
      border-radius:14px;
      font-weight:700;
      padding:.78rem 1.1rem;
      border:1px solid transparent;
      transition:transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition), opacity var(--transition);
      box-shadow:none;
    }
    .btn:hover{transform:translateY(-1px)}
    .btn:active{transform:translateY(0)}
    .btn:disabled,
    .btn.disabled{
      opacity:.55;
      pointer-events:none;
      transform:none;
      box-shadow:none;
    }
    .btn-main{
      color:#fff;
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      box-shadow:0 14px 28px rgba(47,107,255,.18);
    }
    .btn-main:hover,
    .btn-main:focus-visible{
      color:#fff;
      box-shadow:0 18px 34px rgba(47,107,255,.25);
    }
    .btn-soft{
      color:var(--text);
      background:#fff;
      border-color:rgba(220,231,246,.95);
      box-shadow:0 10px 22px rgba(31,61,127,.06);
    }
    .btn-soft:hover,
    .btn-soft:focus-visible{
      color:var(--primary);
      border-color:rgba(47,107,255,.2);
      box-shadow:0 14px 30px rgba(47,107,255,.10);
    }
    .btn-sm{
      padding:.58rem .9rem;
      border-radius:12px;
      font-size:.94rem;
    }

    main{position:relative}
    section{
      scroll-margin-top:118px;
      padding:4.2rem 0;
      position:relative;
    }
    .section-title{
      font-size:clamp(1.5rem,2.2vw,2.15rem);
      line-height:1.15;
      letter-spacing:-.03em;
      font-weight:800;
      margin:0;
    }
    .section-desc{
      color:var(--muted);
      margin:0;
      max-width:68ch;
      font-size:1rem;
    }
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:1rem;
      margin-bottom:1.4rem;
    }
    .section-tag{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.38rem .72rem;
      border-radius:999px;
      background:var(--primary-soft);
      color:var(--primary);
      font-size:.88rem;
      font-weight:700;
      margin-bottom:.95rem;
    }
    .surface{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(220,231,246,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
    }
    .surface-strong{
      background:linear-gradient(180deg, rgba(255,255,255,.95), rgba(248,251,255,.96));
      border:1px solid rgba(220,231,246,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .soft-note{
      color:var(--muted);
      font-size:.92rem;
    }
    .pill-row{
      display:flex;
      flex-wrap:wrap;
      gap:.55rem;
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      padding:.4rem .72rem;
      border-radius:999px;
      background:rgba(47,107,255,.09);
      color:var(--primary);
      font-size:.88rem;
      font-weight:700;
      border:1px solid rgba(47,107,255,.11);
    }
    .pill.mint{
      background:rgba(73,182,232,.12);
      color:#16698f;
      border-color:rgba(73,182,232,.15);
    }
    .pill.gray{
      background:#f3f7fd;
      color:var(--muted);
      border-color:rgba(220,231,246,.95);
    }

    .hero-wrap{
      padding-top:2rem;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);
      gap:1.35rem;
      align-items:stretch;
    }
    .hero-copy,
    .hero-bento{
      min-height:100%;
    }
    .hero-copy{
      padding:2rem;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      gap:1.4rem;
    }
    .hero-title{
      font-size:clamp(2.2rem,4.5vw,4.1rem);
      line-height:1.04;
      letter-spacing:-.05em;
      font-weight:800;
      margin:0 0 1rem;
    }
    .hero-desc{
      margin:0;
      color:var(--muted);
      font-size:1.03rem;
      max-width:56ch;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:.8rem;
      align-items:center;
    }
    .hero-meta{
      display:grid;
      grid-template-columns:repeat(3, minmax(0,1fr));
      gap:.8rem;
    }
    .meta-item{
      padding:1rem 1rem .92rem;
      border-radius:18px;
      background:#fff;
      border:1px solid rgba(220,231,246,.9);
      box-shadow:0 8px 18px rgba(33,61,127,.06);
    }
    .meta-item .num{
      display:block;
      font-size:1.28rem;
      font-weight:800;
      letter-spacing:-.03em;
      color:var(--text);
      line-height:1.1;
      margin-bottom:.25rem;
    }
    .meta-item .label{
      display:block;
      color:var(--muted);
      font-size:.9rem;
    }

    .hero-bento{
      display:grid;
      grid-template-columns:repeat(2, minmax(0,1fr));
      gap:1rem;
      align-content:stretch;
    }
    .bento-card{
      padding:1.1rem;
      border-radius:22px;
      background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,250,255,.98));
      border:1px solid rgba(220,231,246,.95);
      box-shadow:0 12px 28px rgba(31,61,127,.07);
      position:relative;
      overflow:hidden;
    }
    .bento-card::after{
      content:"";
      position:absolute;
      inset:auto -40px -48px auto;
      width:140px;height:140px;border-radius:50%;
      background:radial-gradient(circle, rgba(47,107,255,.12), transparent 64%);
      pointer-events:none;
    }
    .bento-card-lg{
      grid-column:1 / -1;
      min-height:260px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
    }
    .bento-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      margin-bottom:.8rem;
    }
    .mini-title{
      font-size:.92rem;
      font-weight:700;
      color:var(--muted);
      letter-spacing:.02em;
      text-transform:none;
    }
    .live-dot{
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      padding:.34rem .66rem;
      border-radius:999px;
      background:rgba(47,107,255,.09);
      color:var(--primary);
      font-weight:700;
      font-size:.84rem;
    }
    .live-dot i{
      width:.55rem;height:.55rem;border-radius:50%;
      background:var(--primary);
      display:inline-block;
      box-shadow:0 0 0 6px rgba(47,107,255,.08);
    }
    .bento-stat{
      display:grid;
      grid-template-columns:1fr auto;
      gap:1rem;
      align-items:end;
      margin-bottom:1rem;
    }
    .bento-stat .big{
      font-size:2rem;
      line-height:1;
      font-weight:800;
      letter-spacing:-.04em;
      margin-bottom:.2rem;
    }
    .bento-stat .small{
      color:var(--muted);
      margin:0;
      font-size:.93rem;
    }
    .progress-slim{
      height:8px;
      border-radius:999px;
      background:#edf3ff;
      overflow:hidden;
      margin:.65rem 0 .25rem;
    }
    .progress-slim .bar{
      height:100%;
      border-radius:inherit;
      background:linear-gradient(90deg, var(--primary), var(--accent));
    }
    .mini-list{
      display:grid;
      gap:.7rem;
      margin:0;
      padding:0;
      list-style:none;
    }
    .mini-list li{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:.9rem;
      padding:.82rem .85rem;
      background:#fff;
      border:1px solid rgba(220,231,246,.9);
      border-radius:16px;
    }
    .mini-list .left{
      min-width:0;
    }
    .mini-list strong{
      display:block;
      font-size:.96rem;
      margin-bottom:.15rem;
    }
    .mini-list span{
      display:block;
      color:var(--muted);
      font-size:.88rem;
      line-height:1.5;
    }
    .mini-list em{
      font-style:normal;
      font-size:.84rem;
      color:var(--primary);
      font-weight:700;
      white-space:nowrap;
    }
    .micro-tags{
      display:flex;
      flex-wrap:wrap;
      gap:.5rem;
    }
    .micro-tags .tag{
      padding:.34rem .62rem;
      border-radius:999px;
      background:#f4f8ff;
      border:1px solid rgba(220,231,246,.95);
      color:var(--muted);
      font-size:.84rem;
      font-weight:600;
    }
    .bento-card-sm{
      min-height:150px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
    }
    .bento-card-sm .value{
      font-size:1.8rem;
      line-height:1;
      font-weight:800;
      letter-spacing:-.04em;
      margin:.3rem 0;
    }
    .bento-card-sm p{
      margin:0;
      color:var(--muted);
      font-size:.92rem;
    }
    .checkline{
      display:flex;
      flex-wrap:wrap;
      gap:.45rem;
      margin-top:.9rem;
    }
    .checkline .pill{
      padding:.32rem .6rem;
      font-size:.82rem;
    }

    .feature-grid{
      display:grid;
      grid-template-columns:repeat(3, minmax(0,1fr));
      gap:1rem;
    }
    .feature-card{
      padding:1.25rem;
      border-radius:var(--radius);
      background:rgba(255,255,255,.94);
      border:1px solid rgba(220,231,246,.95);
      box-shadow:var(--shadow-soft);
      position:relative;
      overflow:hidden;
      transition:transform var(--transition), box-shadow var(--transition), border-color var(--transition);
      min-height:100%;
    }
    .feature-card:hover{
      transform:translateY(-4px);
      border-color:rgba(47,107,255,.18);
      box-shadow:0 16px 32px rgba(47,107,255,.10);
    }
    .feature-icon{
      width:48px;height:48px;border-radius:16px;
      display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(47,107,255,.12), rgba(73,182,232,.14));
      color:var(--primary);
      font-size:1.2rem;
      margin-bottom:.95rem;
    }
    .feature-num{
      display:block;
      font-size:1.35rem;
      font-weight:800;
      line-height:1;
      margin-bottom:.4rem;
    }
    .feature-card h3{
      font-size:1.06rem;
      margin:0 0 .55rem;
      line-height:1.35;
      font-weight:800;
    }
    .feature-card p{
      margin:0;
      color:var(--muted);
      font-size:.95rem;
    }
    .bar-track{
      height:8px;
      border-radius:999px;
      background:#edf3ff;
      margin-top:.95rem;
      overflow:hidden;
    }
    .bar-track span{
      display:block;
      height:100%;
      border-radius:inherit;
      background:linear-gradient(90deg, var(--primary), var(--accent));
    }

    .scene-grid{
      display:grid;
      grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);
      gap:1rem;
      align-items:stretch;
    }
    .scene-main,
    .scene-side,
    .proof-main,
    .proof-side,
    .lead-shell,
    .cta-shell,
    .faq-shell{
      padding:1.35rem;
    }
    .scene-panel{
      border-radius:22px;
      border:1px solid rgba(220,231,246,.95);
      background:
        linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,250,255,.98));
      box-shadow:var(--shadow-soft);
      overflow:hidden;
      position:relative;
    }
    .scene-panel .panel-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      margin-bottom:1rem;
    }
    .scene-panel h3,
    .proof-main h3,
    .lead-shell h3,
    .cta-shell h3{
      font-size:1.22rem;
      font-weight:800;
      margin:0;
      line-height:1.25;
      letter-spacing:-.03em;
    }
    .scene-list{
      display:grid;
      gap:.8rem;
      margin-top:1rem;
    }
    .scene-list .row-item{
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:.8rem;
      align-items:center;
      padding:.9rem 1rem;
      background:#fff;
      border:1px solid rgba(220,231,246,.92);
      border-radius:16px;
    }
    .scene-list .icon{
      width:42px;height:42px;border-radius:14px;
      display:grid;place-items:center;
      background:rgba(47,107,255,.09);
      color:var(--primary);
      font-size:1rem;
      flex:0 0 auto;
    }
    .scene-list strong{
      display:block;
      font-size:.95rem;
      margin-bottom:.15rem;
      line-height:1.4;
    }
    .scene-list span{
      display:block;
      color:var(--muted);
      font-size:.88rem;
      line-height:1.45;
    }
    .scene-list em{
      font-style:normal;
      font-size:.84rem;
      color:var(--primary);
      font-weight:700;
      white-space:nowrap;
    }
    .scene-side{
      display:grid;
      gap:1rem;
    }
    .mini-panel{
      padding:1.1rem;
      border-radius:22px;
      background:#fff;
      border:1px solid rgba(220,231,246,.95);
      box-shadow:var(--shadow-soft);
      min-height:calc(50% - .5rem);
    }
    .mini-panel .value{
      font-size:1.9rem;
      font-weight:800;
      letter-spacing:-.04em;
      margin:.25rem 0 .35rem;
    }
    .mini-panel p{
      margin:0;
      color:var(--muted);
      font-size:.93rem;
    }
    .mini-panel .icon{
      width:42px;height:42px;border-radius:14px;
      display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(73,182,232,.13), rgba(47,107,255,.12));
      color:var(--primary);
      margin-bottom:.85rem;
    }
    .mini-panel .tagrow{
      display:flex;
      flex-wrap:wrap;
      gap:.45rem;
      margin-top:.95rem;
    }

    .proof-grid{
      display:grid;
      grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
      gap:1rem;
      align-items:stretch;
    }
    .proof-main{
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      gap:1rem;
    }
    .score-box{
      display:flex;
      gap:1rem;
      align-items:flex-start;
    }
    .score-ring{
      width:82px;height:82px;border-radius:50%;
      background:conic-gradient(var(--primary) 0 82%, #e8effc 82% 100%);
      position:relative;
      flex:0 0 auto;
    }
    .score-ring::after{
      content:"";
      position:absolute;
      inset:10px;
      background:#fff;
      border-radius:50%;
      box-shadow:inset 0 0 0 1px rgba(220,231,246,.9);
    }
    .score-label{
      position:absolute;
      inset:0;
      display:grid;
      place-items:center;
      z-index:1;
      font-weight:800;
      font-size:1.2rem;
      color:var(--text);
    }
    .score-text strong{
      display:block;
      font-size:1rem;
      margin-bottom:.2rem;
    }
    .score-text p{
      margin:0;
      color:var(--muted);
      font-size:.93rem;
    }
    .bar-group{
      display:grid;
      gap:.85rem;
      margin-top:.3rem;
    }
    .bar-row{
      display:grid;
      grid-template-columns:120px 1fr 44px;
      gap:.75rem;
      align-items:center;
      font-size:.9rem;
    }
    .bar-row span:first-child{
      color:var(--muted);
      font-weight:600;
    }
    .bar-row .bar-track{margin:0}
    .bar-row .num{
      text-align:right;
      font-weight:700;
      color:var(--text);
    }
    .proof-side{
      display:grid;
      grid-template-columns:repeat(2, minmax(0,1fr));
      gap:1rem;
    }
    .badge-card{
      padding:1.05rem;
      border-radius:22px;
      background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,250,255,.98));
      border:1px solid rgba(220,231,246,.95);
      box-shadow:var(--shadow-soft);
      min-height:150px;
    }
    .badge-card h4{
      font-size:.98rem;
      font-weight:800;
      margin:0 0 .7rem;
      letter-spacing:-.02em;
    }
    .badge-grid{
      display:flex;
      flex-wrap:wrap;
      gap:.5rem;
    }
    .badge-chip{
      padding:.44rem .7rem;
      border-radius:999px;
      background:#f4f8ff;
      border:1px solid rgba(220,231,246,.96);
      color:var(--muted);
      font-size:.86rem;
      font-weight:600;
    }
    .quote-card{
      padding:1.05rem;
      border-radius:22px;
      background:#fff;
      border:1px solid rgba(220,231,246,.95);
      box-shadow:var(--shadow-soft);
      min-height:150px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
    }
    .quote-card p{
      margin:0;
      font-size:.95rem;
      color:var(--text);
    }
    .quote-card .author{
      margin-top:.85rem;
      color:var(--muted);
      font-size:.88rem;
    }

    .lead-shell{
      padding:1.4rem;
    }
    .form-shell{
      display:grid;
      grid-template-columns:minmax(0,1fr) auto;
      gap:.85rem;
      align-items:center;
      margin-top:1rem;
    }
    .input-wrap{
      position:relative;
    }
    .form-control{
      height:54px;
      border-radius:16px;
      border:1px solid rgba(220,231,246,.95);
      background:#fff;
      box-shadow:0 8px 18px rgba(31,61,127,.05);
      padding:0 1rem;
      color:var(--text);
      transition:border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    }
    .form-control::placeholder{color:#9aa8bb}
    .form-control:focus{
      border-color:rgba(47,107,255,.35);
      box-shadow:0 0 0 .22rem rgba(47,107,255,.12);
    }
    .privacy-note{
      margin-top:.85rem;
      color:var(--muted);
      font-size:.9rem;
      display:flex;
      flex-wrap:wrap;
      gap:.55rem;
      align-items:center;
    }
    .privacy-note .dot{
      width:.45rem;height:.45rem;border-radius:50%;
      background:var(--primary);
      box-shadow:0 0 0 5px rgba(47,107,255,.08);
      display:inline-block;
    }

    .latest-grid{
      display:grid;
      grid-template-columns:repeat(2, minmax(0,1fr));
      gap:1rem;
    }
    .post-card{
      padding:1.15rem;
      border-radius:22px;
      background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,250,255,.98));
      border:1px solid rgba(220,231,246,.95);
      box-shadow:var(--shadow-soft);
      display:flex;
      flex-direction:column;
      gap:.85rem;
      min-height:100%;
      position:relative;
      overflow:hidden;
    }
    .post-card:hover{
      transform:translateY(-4px);
      border-color:rgba(47,107,255,.18);
      box-shadow:0 16px 34px rgba(47,107,255,.10);
    }
    .post-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:.8rem;
      flex-wrap:wrap;
    }
    .post-cat,
    .post-time{
      font-size:.84rem;
      color:var(--muted);
    }
    .post-cat{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.32rem .62rem;
      border-radius:999px;
      background:var(--primary-soft);
      color:var(--primary);
      font-weight:700;
    }
    .post-card h3{
      font-size:1.08rem;
      line-height:1.4;
      margin:0;
      font-weight:800;
      letter-spacing:-.02em;
      display:-webkit-box;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    .post-card p{
      margin:0;
      color:var(--muted);
      font-size:.94rem;
      line-height:1.72;
      display:-webkit-box;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
      overflow:hidden;
      min-height:3.4em;
    }
    .post-footer{
      margin-top:auto;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:.8rem;
      padding-top:.2rem;
    }
    .post-link{
      color:var(--primary);
      font-weight:700;
      font-size:.92rem;
      display:inline-flex;
      align-items:center;
      gap:.3rem;
    }
    .post-link i{
      transition:transform var(--transition);
    }
    .post-card:hover .post-link i{transform:translateX(2px)}
    .latest-empty{
      padding:1.4rem;
      min-height:220px;
      display:grid;
      place-items:center;
      text-align:center;
      border:1px dashed rgba(170,190,220,.85);
      border-radius:22px;
      background:rgba(255,255,255,.84);
      box-shadow:var(--shadow-soft);
    }
    .latest-empty p{
      margin:0 0 1rem;
      color:var(--muted);
      font-size:1rem;
    }

    .accordion{
      --bs-accordion-bg: transparent;
      --bs-accordion-border-color: transparent;
      --bs-accordion-active-color: var(--text);
      --bs-accordion-active-bg: transparent;
      --bs-accordion-btn-focus-box-shadow: none;
      --bs-accordion-btn-icon: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%232f6bff'%3e%3cpath fill-rule='evenodd' d='M1.646 5.646a.5.5 0 0 1 .708 0L8 11.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
      --bs-accordion-btn-active-icon: var(--bs-accordion-btn-icon);
    }
    .faq-shell{
      padding:1.4rem;
    }
    .accordion-item{
      background:#fff;
      border:1px solid rgba(220,231,246,.95) !important;
      border-radius:18px !important;
      box-shadow:var(--shadow-soft);
      overflow:hidden;
      margin-bottom:.9rem;
    }
    .accordion-button{
      padding:1rem 1.05rem;
      font-weight:800;
      color:var(--text);
      background:#fff;
      box-shadow:none !important;
    }
    .accordion-button:not(.collapsed){
      color:var(--primary);
      background:linear-gradient(180deg, rgba(47,107,255,.05), rgba(255,255,255,.98));
    }
    .accordion-button::after{
      width:1rem;height:1rem;
      background-size:1rem;
      transition:transform var(--transition);
    }
    .accordion-body{
      padding:0 1.05rem 1.05rem;
      color:var(--muted);
      line-height:1.8;
    }

    .cta-shell{
      padding:1.5rem;
      background:
        linear-gradient(135deg, rgba(47,107,255,.08), rgba(73,182,232,.08)),
        linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,250,255,.98));
    }
    .cta-row{
      display:flex;
      flex-wrap:wrap;
      gap:.8rem;
      align-items:center;
      justify-content:space-between;
    }
    .cta-copy{
      max-width:62ch;
    }
    .cta-copy p{
      margin:.55rem 0 0;
      color:var(--muted);
    }
    .cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:.75rem;
      align-items:center;
    }

    .site-footer{
      padding:2rem 0 4rem;
      color:var(--muted);
    }
    .footer-wrap{
      border-top:1px solid rgba(220,231,246,.95);
      padding-top:1.4rem;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.15fr .85fr .95fr;
      gap:1rem;
      align-items:start;
    }
    .footer-card{
      padding:0;
    }
    .footer-title{
      font-size:1rem;
      font-weight:800;
      color:var(--text);
      margin:0 0 .8rem;
    }
    .footer-links{
      display:grid;
      gap:.55rem;
    }
    .footer-links a{
      color:var(--muted);
      width:max-content;
    }
    .footer-links a:hover{
      color:var(--primary);
      text-decoration:underline;
      text-underline-offset:4px;
    }
    .footer-copy{
      margin-top:1rem;
      font-size:.9rem;
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:.75rem;
      margin-bottom:.9rem;
      color:var(--text);
      font-weight:800;
    }
    .footer-brand .brand-badge{
      width:34px;height:34px;border-radius:11px;font-size:.82rem;
    }

    .floating-bar{
      position:fixed;
      left:50%;
      bottom:16px;
      transform:translateX(-50%);
      width:min(1180px, calc(100% - 24px));
      z-index:1040;
      background:rgba(255,255,255,.92);
      border:1px solid rgba(220,231,246,.95);
      border-radius:20px;
      box-shadow:0 18px 40px rgba(31,61,127,.12);
      backdrop-filter:blur(14px);
      padding:.9rem 1rem;
      display:flex;
      gap:1rem;
      align-items:center;
      justify-content:space-between;
    }
    .floating-bar .bar-copy{
      min-width:0;
    }
    .floating-bar .bar-copy strong{
      display:block;
      color:var(--text);
      font-size:.98rem;
      margin-bottom:.12rem;
    }
    .floating-bar .bar-copy span{
      color:var(--muted);
      font-size:.9rem;
    }
    .floating-bar .bar-actions{
      display:flex;
      gap:.7rem;
      flex-wrap:wrap;
      justify-content:flex-end;
    }

    @media (max-width: 1199.98px){
      .hero-grid,
      .scene-grid,
      .proof-grid,
      .footer-grid{
        grid-template-columns:1fr;
      }
      .proof-side{
        grid-template-columns:repeat(2, minmax(0,1fr));
      }
    }
    @media (max-width: 991.98px){
      section{padding:3.5rem 0}
      .hero-copy,
      .scene-main,
      .scene-side,
      .proof-main,
      .lead-shell,
      .cta-shell,
      .faq-shell{
        padding:1.2rem;
      }
      .feature-grid,
      .latest-grid{
        grid-template-columns:1fr;
      }
      .hero-meta,
      .proof-side{
        grid-template-columns:1fr 1fr;
      }
      .hero-bento{
        grid-template-columns:1fr 1fr;
      }
    }
    @media (max-width: 767.98px){
      body{padding-bottom:144px}
      .topbar{
        align-items:flex-start !important;
        flex-direction:column;
      }
      .header-actions{
        width:100%;
        justify-content:space-between;
      }
      .hero-title{
        font-size:clamp(1.95rem, 8vw, 3rem);
      }
      .hero-meta,
      .proof-side,
      .hero-bento,
      .bar-row{
        grid-template-columns:1fr;
      }
      .bento-card-lg{
        min-height:auto;
      }
      .form-shell{
        grid-template-columns:1fr;
      }
      .scene-list .row-item{
        grid-template-columns:auto 1fr;
      }
      .scene-list .row-item em{
        grid-column:2;
      }
      .floating-bar{
        left:0;
        transform:none;
        width:100%;
        bottom:0;
        border-radius:22px 22px 0 0;
        padding:.9rem .95rem calc(.9rem + env(safe-area-inset-bottom));
      }
      .floating-bar .bar-actions{
        width:100%;
      }
      .floating-bar .bar-actions .btn{
        flex:1 1 0;
      }
    }
    @media (max-width: 575.98px){
      section{padding:3rem 0}
      .hero-copy,
      .scene-main,
      .scene-side,
      .proof-main,
      .lead-shell,
      .cta-shell,
      .faq-shell{
        padding:1rem;
      }
      .hero-actions,
      .cta-actions{
        width:100%;
      }
      .hero-actions .btn,
      .cta-actions .btn{
        width:100%;
      }
      .floating-bar{
        flex-direction:column;
        align-items:stretch;
      }
      .floating-bar .bar-actions{
        width:100%;
      }
    }

/* roulang page: article */
:root{
      --bg:#f5f8ff;
      --bg-soft:#eef4ff;
      --surface:#ffffff;
      --surface-2:#f8fbff;
      --text:#17324f;
      --muted:#6c7f98;
      --line:#dce7f6;
      --primary:#2f6bff;
      --primary-2:#5d8dff;
      --primary-soft:#e8f0ff;
      --accent:#49b6e8;
      --shadow:0 18px 42px rgba(42, 79, 160, .12);
      --shadow-soft:0 10px 26px rgba(31, 61, 127, .08);
      --radius:24px;
      --radius-sm:18px;
      --radius-xs:14px;
      --transition:220ms ease;
      --container:1180px;
    }

    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(47,107,255,.09), transparent 30%),
        radial-gradient(circle at 85% 10%, rgba(73,182,232,.10), transparent 28%),
        linear-gradient(180deg, #f8fbff 0%, #f3f7fe 100%);
      line-height:1.7;
      min-height:100vh;
      padding-bottom:92px;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none;transition:color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition), opacity var(--transition)}
    a:hover{color:var(--primary)}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    ::selection{background:rgba(47,107,255,.18);color:var(--text)}

    .container,
    .container-lg,
    .container-xl{
      max-width:var(--container);
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:1030;
      backdrop-filter:blur(14px);
      background:rgba(245,248,255,.82);
      border-bottom:1px solid rgba(220,231,246,.72);
    }
    .topbar{
      min-height:56px;
    }
    .brand{
      display:inline-flex;
      align-items:center;
      gap:.75rem;
      font-weight:800;
      letter-spacing:-.03em;
      color:var(--text);
      white-space:nowrap;
    }
    .brand:hover{color:var(--text)}
    .brand-badge{
      width:36px;
      height:36px;
      border-radius:12px;
      background:linear-gradient(145deg, var(--primary), var(--accent));
      box-shadow:0 10px 22px rgba(47,107,255,.22);
      display:grid;
      place-items:center;
      color:#fff;
      font-weight:800;
      font-size:.9rem;
      flex:0 0 auto;
    }
    .brand-name{
      font-size:1.08rem;
      line-height:1;
    }
    .header-actions{
      display:flex;
      align-items:center;
      gap:.75rem;
      flex-wrap:wrap;
    }
    .chip-nav{
      display:flex;
      align-items:center;
      gap:.6rem;
      overflow-x:auto;
      padding:0 0 .35rem;
      scrollbar-width:none;
      -ms-overflow-style:none;
      scroll-snap-type:x proximity;
    }
    .chip-nav::-webkit-scrollbar{display:none}
    .chip{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      white-space:nowrap;
      height:42px;
      padding:0 1rem;
      border-radius:999px;
      border:1px solid rgba(220,231,246,.95);
      background:rgba(255,255,255,.88);
      color:var(--muted);
      font-size:.95rem;
      font-weight:600;
      scroll-snap-align:start;
      box-shadow:0 4px 14px rgba(32,62,124,.05);
      flex:0 0 auto;
    }
    .chip:hover{
      color:var(--primary);
      border-color:rgba(47,107,255,.20);
      transform:translateY(-1px);
      box-shadow:0 10px 20px rgba(47,107,255,.09);
    }
    .chip.active{
      color:#fff;
      border-color:transparent;
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      box-shadow:0 12px 24px rgba(47,107,255,.20);
    }

    .btn{
      border-radius:14px;
      font-weight:700;
      padding:.78rem 1.1rem;
      border:1px solid transparent;
      transition:transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition), opacity var(--transition);
      box-shadow:none;
    }
    .btn:hover{transform:translateY(-1px)}
    .btn:active{transform:translateY(0)}
    .btn:focus-visible{
      box-shadow:0 0 0 .22rem rgba(47,107,255,.18);
    }
    .btn:disabled,
    .btn.disabled{
      opacity:.55;
      pointer-events:none;
      transform:none;
      box-shadow:none;
    }
    .btn-main{
      color:#fff;
      background:linear-gradient(135deg, var(--primary), var(--primary-2));
      box-shadow:0 14px 28px rgba(47,107,255,.18);
    }
    .btn-main:hover,
    .btn-main:focus-visible{
      color:#fff;
      box-shadow:0 18px 34px rgba(47,107,255,.25);
    }
    .btn-soft{
      color:var(--text);
      background:#fff;
      border-color:rgba(220,231,246,.95);
      box-shadow:0 10px 22px rgba(31,61,127,.06);
    }
    .btn-soft:hover,
    .btn-soft:focus-visible{
      color:var(--primary);
      border-color:rgba(47,107,255,.2);
      box-shadow:0 14px 30px rgba(47,107,255,.10);
    }
    .btn-sm{
      padding:.58rem .9rem;
      border-radius:12px;
      font-size:.94rem;
    }

    main{position:relative}
    section{
      scroll-margin-top:118px;
      padding:4.1rem 0;
      position:relative;
    }
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:1rem;
      margin-bottom:1.35rem;
    }
    .section-title{
      font-size:clamp(1.5rem,2.2vw,2.15rem);
      line-height:1.15;
      letter-spacing:-.03em;
      font-weight:800;
      margin:0;
    }
    .section-desc{
      color:var(--muted);
      margin:.55rem 0 0;
      max-width:68ch;
      font-size:1rem;
    }
    .section-tag{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.38rem .72rem;
      border-radius:999px;
      background:var(--primary-soft);
      color:var(--primary);
      font-size:.88rem;
      font-weight:700;
      margin-bottom:.95rem;
    }

    .hero-wrap{
      padding-top:2rem;
    }
    .article-hero{
      border:1px solid rgba(220,231,246,.95);
      background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,251,255,.95));
      border-radius:var(--radius);
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .article-hero-inner{
      padding:1.45rem;
    }
    .crumb{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:.45rem;
      color:var(--muted);
      font-size:.95rem;
      margin-bottom:1rem;
    }
    .crumb a{
      color:var(--muted);
    }
    .crumb a:hover{
      color:var(--primary);
      text-decoration:underline;
      text-underline-offset:3px;
    }

    .article-headline{
      display:grid;
      grid-template-columns:minmax(0,1.18fr) minmax(300px,.82fr);
      gap:1rem;
      align-items:stretch;
    }
    .article-title{
      font-size:clamp(1.95rem,3.1vw,3.1rem);
      line-height:1.12;
      letter-spacing:-.04em;
      font-weight:800;
      margin:0;
    }
    .article-lead{
      color:var(--muted);
      font-size:1.05rem;
      margin:1rem 0 0;
      max-width:64ch;
    }
    .meta-row{
      display:flex;
      flex-wrap:wrap;
      gap:.7rem;
      margin-top:1.15rem;
    }
    .meta-chip{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.5rem .82rem;
      border-radius:999px;
      border:1px solid rgba(220,231,246,.98);
      background:#fff;
      color:var(--muted);
      font-size:.92rem;
      font-weight:600;
      box-shadow:0 6px 18px rgba(31,61,127,.05);
    }
    .meta-chip strong{
      color:var(--text);
      font-weight:700;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:.75rem;
      margin-top:1.25rem;
    }

    .panel{
      border:1px solid rgba(220,231,246,.95);
      background:linear-gradient(180deg, #fff, #f9fbff);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
      overflow:hidden;
    }
    .panel-body{
      padding:1.2rem;
    }
    .panel-title{
      margin:0 0 .85rem;
      font-size:1.05rem;
      font-weight:800;
      letter-spacing:-.02em;
    }

    .info-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:.85rem;
    }
    .info-card{
      border:1px solid rgba(220,231,246,.92);
      background:var(--surface);
      border-radius:18px;
      padding:1rem;
      box-shadow:0 8px 20px rgba(40,67,128,.05);
      min-height:96px;
    }
    .info-card .label{
      color:var(--muted);
      font-size:.85rem;
      margin-bottom:.35rem;
    }
    .info-card .value{
      font-size:1.1rem;
      font-weight:800;
      letter-spacing:-.02em;
      color:var(--text);
      margin-bottom:.35rem;
    }
    .info-card .note{
      color:var(--muted);
      font-size:.92rem;
      margin:0;
    }

    .tag-row{
      display:flex;
      flex-wrap:wrap;
      gap:.55rem;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.42rem .72rem;
      border-radius:999px;
      background:rgba(47,107,255,.09);
      border:1px solid rgba(47,107,255,.12);
      color:var(--primary);
      font-size:.88rem;
      font-weight:700;
    }
    .tag.muted{
      background:#f3f7fd;
      color:var(--muted);
      border-color:rgba(220,231,246,.98);
    }
    .tag.teal{
      background:rgba(73,182,232,.12);
      color:#16698f;
      border-color:rgba(73,182,232,.16);
    }

    .mini-bar{
      margin-top:.85rem;
      height:10px;
      border-radius:999px;
      background:#edf3fb;
      overflow:hidden;
    }
    .mini-bar span{
      display:block;
      height:100%;
      border-radius:999px;
      background:linear-gradient(90deg, var(--primary), var(--accent));
    }

    .subtle-note{
      margin-top:.9rem;
      padding:.9rem 1rem;
      background:var(--bg-soft);
      border:1px dashed rgba(47,107,255,.18);
      border-radius:18px;
      color:var(--muted);
      font-size:.95rem;
    }

    .metric-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:1rem;
    }
    .metric-card{
      border:1px solid rgba(220,231,246,.94);
      background:linear-gradient(180deg, #fff, #f8fbff);
      border-radius:var(--radius);
      padding:1.2rem;
      box-shadow:var(--shadow-soft);
      transition:transform var(--transition), box-shadow var(--transition), border-color var(--transition);
      height:100%;
    }
    .metric-card:hover{
      transform:translateY(-2px);
      box-shadow:var(--shadow);
      border-color:rgba(47,107,255,.16);
    }
    .metric-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      margin-bottom:.7rem;
    }
    .metric-icon{
      width:42px;
      height:42px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:linear-gradient(145deg, rgba(47,107,255,.13), rgba(73,182,232,.12));
      color:var(--primary);
      font-size:1.15rem;
      flex:0 0 auto;
    }
    .metric-value{
      font-size:1.45rem;
      line-height:1;
      letter-spacing:-.03em;
      font-weight:800;
      margin:0;
    }
    .metric-label{
      color:var(--muted);
      font-size:.95rem;
      margin:.3rem 0 .25rem;
    }
    .metric-desc{
      color:var(--muted);
      margin:0;
      font-size:.95rem;
    }

    .article-layout{
      display:grid;
      grid-template-columns:minmax(0,1.05fr) minmax(300px,.65fr);
      gap:1.25rem;
      align-items:start;
    }
    .article-shell{
      border:1px solid rgba(220,231,246,.95);
      background:var(--surface);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .article-shell .shell-head{
      padding:1.1rem 1.2rem;
      border-bottom:1px solid rgba(220,231,246,.9);
      background:linear-gradient(180deg, #fff, #f8fbff);
    }
    .article-shell .shell-body{
      padding:1.35rem 1.2rem;
    }
    .shell-label{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.35rem .66rem;
      border-radius:999px;
      background:var(--primary-soft);
      color:var(--primary);
      font-weight:700;
      font-size:.88rem;
    }

    .article-body{
      font-size:1.02rem;
      line-height:1.92;
      color:var(--text);
      max-width:720px;
      margin:0 auto;
    }
    .article-body > *:first-child{margin-top:0}
    .article-body > *:last-child{margin-bottom:0}
    .article-body h2,
    .article-body h3,
    .article-body h4{
      color:var(--text);
      letter-spacing:-.03em;
      line-height:1.28;
      font-weight:800;
      margin:1.8em 0 .7em;
    }
    .article-body h2{font-size:1.5rem}
    .article-body h3{font-size:1.24rem}
    .article-body p{
      margin:0 0 1.15em;
      color:#29435e;
    }
    .article-body a{
      color:var(--primary);
      text-decoration:none;
      border-bottom:1px solid rgba(47,107,255,.18);
    }
    .article-body a:hover{
      color:#174fd3;
      border-bottom-color:currentColor;
    }
    .article-body ul,
    .article-body ol{
      padding-left:1.2rem;
      margin:0 0 1.15em;
      color:#29435e;
    }
    .article-body li{margin:.45rem 0}
    .article-body blockquote{
      margin:1.4rem 0;
      padding:1rem 1.1rem;
      border-left:4px solid var(--primary);
      background:var(--bg-soft);
      border-radius:0 18px 18px 0;
      color:#2a4462;
    }
    .article-body img{
      max-width:100%;
      height:auto;
      border-radius:22px;
      box-shadow:0 14px 30px rgba(31,61,127,.10);
      margin:1.2rem 0;
    }
    .article-body table{
      width:100%;
      border-collapse:separate;
      border-spacing:0;
      margin:1.2rem 0;
      overflow:hidden;
      border:1px solid rgba(220,231,246,.95);
      border-radius:18px;
    }
    .article-body th,
    .article-body td{
      padding:.85rem .95rem;
      border-bottom:1px solid rgba(220,231,246,.95);
      text-align:left;
      vertical-align:top;
    }
    .article-body th{
      background:#f7fbff;
      color:var(--text);
      font-weight:700;
    }
    .article-body tr:last-child td{border-bottom:none}

    .side-sticky{
      position:sticky;
      top:118px;
    }
    .aside-stack{
      display:grid;
      gap:1rem;
    }
    .aside-card{
      border:1px solid rgba(220,231,246,.95);
      background:linear-gradient(180deg, #fff, #f8fbff);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
      overflow:hidden;
    }
    .aside-card .aside-head{
      padding:1rem 1.05rem;
      border-bottom:1px solid rgba(220,231,246,.9);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
    }
    .aside-card .aside-body{
      padding:1rem 1.05rem 1.1rem;
    }
    .aside-title{
      margin:0;
      font-size:1.02rem;
      font-weight:800;
      letter-spacing:-.02em;
    }
    .detail-list{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:.7rem;
    }
    .detail-list li{
      display:flex;
      align-items:flex-start;
      gap:.7rem;
      padding:.75rem .8rem;
      border-radius:18px;
      background:#fff;
      border:1px solid rgba(220,231,246,.9);
      color:#29435e;
    }
    .detail-list i{
      color:var(--primary);
      font-size:1rem;
      margin-top:.1rem;
      flex:0 0 auto;
    }
    .detail-list strong{
      color:var(--text);
      display:block;
      font-weight:800;
      margin-bottom:.12rem;
    }
    .detail-list span{
      color:var(--muted);
      font-size:.94rem;
    }

    .link-grid{
      display:grid;
      gap:.8rem;
    }
    .link-card{
      display:flex;
      align-items:flex-start;
      gap:.8rem;
      padding:1rem;
      border-radius:18px;
      border:1px solid rgba(220,231,246,.95);
      background:#fff;
      box-shadow:0 8px 20px rgba(31,61,127,.05);
      transition:transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }
    .link-card:hover{
      transform:translateY(-2px);
      box-shadow:0 16px 30px rgba(47,107,255,.10);
      border-color:rgba(47,107,255,.18);
    }
    .link-card i{
      width:40px;
      height:40px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:var(--primary-soft);
      color:var(--primary);
      font-size:1.05rem;
      flex:0 0 auto;
    }
    .link-card .lc-title{
      margin:0 0 .22rem;
      font-weight:800;
      color:var(--text);
    }
    .link-card .lc-desc{
      margin:0;
      color:var(--muted);
      font-size:.94rem;
    }

    .quick-strip{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:.8rem;
    }
    .quick-item{
      border:1px solid rgba(220,231,246,.95);
      background:#fff;
      border-radius:18px;
      padding:.95rem 1rem;
      box-shadow:0 8px 20px rgba(31,61,127,.05);
      transition:transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }
    .quick-item:hover{
      transform:translateY(-2px);
      box-shadow:0 16px 30px rgba(47,107,255,.10);
      border-color:rgba(47,107,255,.18);
    }
    .quick-item .qk-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      margin-bottom:.6rem;
    }
    .quick-item .qk-label{
      font-weight:800;
      margin:0;
      color:var(--text);
    }
    .quick-item .qk-value{
      margin:0;
      color:var(--primary);
      font-weight:800;
      font-size:1.15rem;
    }
    .quick-item .qk-desc{
      margin:0;
      color:var(--muted);
      font-size:.94rem;
    }

    .feedback-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:1rem;
    }
    .feedback-card{
      border:1px solid rgba(220,231,246,.95);
      background:linear-gradient(180deg, #fff, #f8fbff);
      border-radius:var(--radius);
      padding:1.15rem;
      box-shadow:var(--shadow-soft);
      height:100%;
    }
    .stars{
      color:#ffb23f;
      letter-spacing:.08em;
      font-size:1rem;
      margin-bottom:.7rem;
    }
    .feedback-card p{
      margin:0 0 .85rem;
      color:#29435e;
    }
    .feedback-card .who{
      color:var(--muted);
      font-size:.92rem;
    }

    .faq-list{
      display:grid;
      gap:.9rem;
    }
    details.faq-item{
      border:1px solid rgba(220,231,246,.95);
      background:#fff;
      border-radius:20px;
      box-shadow:var(--shadow-soft);
      overflow:hidden;
    }
    details.faq-item[open]{
      box-shadow:var(--shadow);
      border-color:rgba(47,107,255,.16);
    }
    details.faq-item summary{
      list-style:none;
      cursor:pointer;
      padding:1rem 1.1rem;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      font-weight:800;
      color:var(--text);
      outline:none;
    }
    details.faq-item summary::-webkit-details-marker{display:none}
    details.faq-item summary .arrow{
      width:34px;
      height:34px;
      border-radius:12px;
      background:var(--primary-soft);
      color:var(--primary);
      display:grid;
      place-items:center;
      flex:0 0 auto;
      transition:transform var(--transition), background-color var(--transition);
    }
    details.faq-item[open] summary .arrow{
      transform:rotate(180deg);
      background:rgba(47,107,255,.14);
    }
    .faq-content{
      padding:0 1.1rem 1rem;
      color:var(--muted);
    }
    .faq-content p{
      margin:0;
    }

    .cta-box{
      border:1px solid rgba(220,231,246,.95);
      background:linear-gradient(135deg, rgba(47,107,255,.08), rgba(73,182,232,.08)), #fff;
      border-radius:28px;
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .cta-box-inner{
      padding:1.4rem;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      flex-wrap:wrap;
    }
    .cta-copy h2{
      margin:0 0 .4rem;
      font-size:clamp(1.4rem,2vw,1.95rem);
      font-weight:800;
      letter-spacing:-.03em;
    }
    .cta-copy p{
      margin:0;
      color:var(--muted);
      max-width:60ch;
    }

    .site-footer{
      margin-top:1rem;
      padding:0 0 1.2rem;
    }
    .footer-wrap{
      border:1px solid rgba(220,231,246,.95);
      background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,251,255,.95));
      border-radius:30px;
      box-shadow:var(--shadow);
      padding:1.35rem;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr .8fr;
      gap:1rem;
    }
    .footer-card{
      border:1px solid rgba(220,231,246,.92);
      background:#fff;
      border-radius:22px;
      padding:1rem;
      box-shadow:0 8px 20px rgba(31,61,127,.05);
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:.75rem;
      font-weight:800;
      font-size:1.05rem;
      margin-bottom:.75rem;
    }
    .footer-title{
      margin:0 0 .75rem;
      font-size:1.02rem;
      font-weight:800;
    }
    .footer-links{
      display:flex;
      flex-wrap:wrap;
      gap:.55rem .9rem;
    }
    .footer-links a{
      color:var(--muted);
      font-weight:600;
      border-bottom:1px solid transparent;
    }
    .footer-links a:hover{
      color:var(--primary);
      border-bottom-color:rgba(47,107,255,.25);
    }
    .footer-copy{
      color:var(--muted);
      font-size:.95rem;
    }

    .bottom-cta{
      position:fixed;
      left:0;
      right:0;
      bottom:0;
      z-index:1040;
      padding:.8rem 0;
      background:linear-gradient(180deg, rgba(245,248,255,.08), rgba(245,248,255,.96) 24%, rgba(245,248,255,.98));
      backdrop-filter:blur(14px);
      border-top:1px solid rgba(220,231,246,.72);
    }
    .bottom-cta .bar{
      border:1px solid rgba(220,231,246,.95);
      background:rgba(255,255,255,.92);
      box-shadow:var(--shadow);
      border-radius:22px;
      padding:.9rem 1rem;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:.9rem;
      flex-wrap:wrap;
    }
    .bottom-cta .bar .txt{
      color:var(--text);
      font-weight:700;
    }
    .bottom-cta .bar .sub{
      color:var(--muted);
      font-size:.92rem;
      margin-top:.15rem;
    }
    .bottom-cta .actions{
      display:flex;
      gap:.65rem;
      flex-wrap:wrap;
    }

    .empty-shell{
      border:1px solid rgba(220,231,246,.95);
      background:linear-gradient(180deg, #fff, #f8fbff);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
      padding:2rem 1.4rem;
      text-align:center;
    }
    .empty-shell .icon{
      width:60px;
      height:60px;
      margin:0 auto 1rem;
      border-radius:20px;
      display:grid;
      place-items:center;
      background:var(--primary-soft);
      color:var(--primary);
      font-size:1.6rem;
    }
    .empty-shell h1,
    .empty-shell h2{
      margin:0 0 .65rem;
      font-weight:800;
      letter-spacing:-.03em;
    }
    .empty-shell p{
      margin:0 auto 1.2rem;
      color:var(--muted);
      max-width:46ch;
    }

    .focus-ring:focus-visible{
      outline:none;
      box-shadow:0 0 0 .22rem rgba(47,107,255,.18);
    }

    @media (max-width: 1199.98px){
      .article-headline{
        grid-template-columns:1fr;
      }
      .article-layout{
        grid-template-columns:1fr;
      }
      .side-sticky{
        position:static;
      }
    }
    @media (max-width: 991.98px){
      section{padding:3.5rem 0}
      .metric-grid,
      .feedback-grid,
      .footer-grid,
      .quick-strip{
        grid-template-columns:1fr;
      }
      .info-grid{
        grid-template-columns:1fr 1fr;
      }
      .cta-box-inner{
        padding:1.15rem;
      }
    }
    @media (max-width: 767.98px){
      body{padding-bottom:128px}
      .topbar{
        flex-direction:column;
        align-items:flex-start !important;
        justify-content:flex-start !important;
      }
      .header-actions{width:100%}
      .header-actions .btn{width:100%}
      .article-hero-inner,
      .shell-body,
      .shell-head,
      .panel-body,
      .footer-wrap,
      .footer-card,
      .cta-box-inner{
        padding-left:1rem;
        padding-right:1rem;
      }
      .info-grid{
        grid-template-columns:1fr;
      }
      .article-title{
        font-size:clamp(1.65rem,7vw,2.2rem);
      }
      .section-head{
        flex-direction:column;
        align-items:flex-start;
      }
      .bottom-cta .bar{
        border-radius:20px;
      }
    }
    @media (max-width: 575.98px){
      .hero-wrap{padding-top:1.4rem}
      .article-hero-inner{
        padding:1rem;
      }
      .meta-row,.hero-actions,.bottom-cta .actions{
        gap:.55rem;
      }
      .chip{
        height:38px;
        padding:0 .88rem;
        font-size:.92rem;
      }
      .btn{
        width:auto;
      }
      .panel-body{
        padding:1rem;
      }
      .footer-wrap{
        padding:1rem;
        border-radius:26px;
      }
      .footer-card,
      .aside-card,
      .article-shell,
      .metric-card,
      .feedback-card,
      .cta-box,
      .empty-shell{
        border-radius:22px;
      }
      .article-body{
        font-size:1rem;
        line-height:1.88;
      }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}