/* roulang page: index */
:root{
      --brand:#2f6fed;
      --brand-strong:#2159d4;
      --brand-soft:#eaf1ff;
      --bg:#f6f9fe;
      --card:#ffffff;
      --ink:#10213a;
      --muted:#5f6f89;
      --line:#dbe5f3;
      --shadow:0 16px 40px rgba(16, 33, 58, 0.08);
      --shadow-hover:0 22px 48px rgba(16, 33, 58, 0.12);
      --radius:24px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:
        radial-gradient(circle at top left, rgba(47,111,237,.09), transparent 26%),
        radial-gradient(circle at top right, rgba(120,187,255,.10), transparent 24%),
        linear-gradient(180deg, #ffffff 0%, #f7faff 36%, #f6f9fe 100%);
      font-family: PingFang SC, Microsoft YaHei, "Noto Sans SC", sans-serif;
    }
    ::selection{background:rgba(47,111,237,.18); color:var(--ink)}
    .container-wrap{max-width:1240px}
    .card-surface{
      background:var(--card);
      border:1px solid rgba(219,229,243,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .card-hover{
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .card-hover:hover{
      transform: translateY(-2px);
      box-shadow:var(--shadow-hover);
      border-color:#c8d7f5;
    }
    .btn-primary,.btn-secondary,.nav-pill{
      transition: all .2s ease;
    }
    .btn-primary{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      border-radius:9999px;
      background:var(--brand);
      color:#fff;
      padding:.88rem 1.2rem;
      font-weight:700;
      box-shadow:0 12px 24px rgba(47,111,237,.22);
    }
    .btn-primary:hover{background:var(--brand-strong); transform:translateY(-1px)}
    .btn-secondary{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      border-radius:9999px;
      border:1px solid #c8d7f5;
      background:#fff;
      color:var(--ink);
      padding:.88rem 1.2rem;
      font-weight:700;
    }
    .btn-secondary:hover{background:#f7fbff; border-color:#a9c4f4; transform:translateY(-1px)}
    .nav-pill{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.45rem;
      border-radius:9999px;
      padding:.7rem 1rem;
      border:1px solid transparent;
      color:#334155;
      font-weight:600;
    }
    .nav-pill:hover{background:#f4f8ff; color:#1d4ed8; border-color:#d5e3ff}
    .nav-pill.active{
      background:var(--brand-soft);
      color:#1d4ed8;
      border-color:#cfe0ff;
    }
    .section-pad{padding-top:4.5rem;padding-bottom:4.5rem}
    .section-title{
      font-size:clamp(1.55rem, 1.2rem + 1vw, 2.35rem);
      line-height:1.18;
      letter-spacing:-0.02em;
      color:var(--ink);
    }
    .section-lead{color:var(--muted); line-height:1.85}
    .tag-soft{
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      border-radius:9999px;
      background:#eef4ff;
      color:#2551bf;
      border:1px solid #d8e6ff;
      padding:.45rem .8rem;
      font-size:.875rem;
      font-weight:600;
    }
    .mini-stat{
      background:linear-gradient(180deg, rgba(255,255,255,.92), rgba(241,247,255,.98));
      border:1px solid rgba(199,214,243,.8);
    }
    .faq-item summary{
      list-style:none;
      cursor:pointer;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item[open] .faq-chevron{transform:rotate(180deg)}
    .bottom-bar{
      box-shadow:0 -12px 30px rgba(16, 33, 58, 0.08);
      backdrop-filter:saturate(140%);
    }
    .focus-ring:focus{
      outline:none;
      box-shadow:0 0 0 4px rgba(47,111,237,.16);
    }
    .soft-grid{
      background-image:
        linear-gradient(rgba(47,111,237,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(47,111,237,.06) 1px, transparent 1px);
      background-size:28px 28px;
    }
    .footer-link{
      color:#4b607d;
      transition: color .2s ease;
    }
    .footer-link:hover{color:#1d4ed8}
    @media (max-width: 767px){
      .section-pad{padding-top:3.5rem;padding-bottom:3.5rem}
    }

/* roulang page: category2 */
:root{
      --brand:#2F7FEA;
      --brand-dark:#1C5FC0;
      --brand-soft:#EAF3FF;
      --mint:#51BFA6;
      --ink:#122033;
      --text:#334155;
      --muted:#64748B;
      --line:#DDE7F3;
      --panel:#FFFFFF;
      --bg:#F7FBFF;
      --bg-alt:#EEF6FF;
      --radius:24px;
      --radius-lg:32px;
      --shadow:0 18px 50px rgba(15,23,42,.08);
      --shadow-soft:0 14px 38px rgba(47,127,234,.14);
      --transition:180ms ease;
      --max:1240px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-height:100vh;
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
      color:var(--text);
      line-height:1.7;
      background:
        radial-gradient(circle at 12% 4%, rgba(47,127,234,.12), transparent 34%),
        radial-gradient(circle at 88% 18%, rgba(81,191,166,.10), transparent 30%),
        linear-gradient(180deg,#ffffff 0%,var(--bg) 48%,#ffffff 100%);
      padding-bottom:84px;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img,svg{display:block;max-width:100%}
    button,input{font:inherit}
    input:focus{outline:none}
    ::selection{background:rgba(47,127,234,.16);color:var(--ink)}
    .bg-brand{background:var(--brand)}
    .text-brand{color:var(--brand)}
    .focus-ring:focus{box-shadow:0 0 0 4px rgba(47,127,234,.16)}
    .nav-pill{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:40px;
      padding:0 14px;
      border-radius:999px;
      color:#475569;
      font-weight:700;
      transition:background var(--transition),color var(--transition),transform var(--transition);
    }
    .nav-pill:hover{
      background:#EFF6FF;
      color:var(--brand-dark);
      transform:translateY(-1px);
    }
    .nav-pill.active{
      background:var(--brand-soft);
      color:var(--brand-dark);
      box-shadow:inset 0 0 0 1px rgba(47,127,234,.12);
    }
    .btn-primary,.btn-secondary,.btn-ghost{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.45rem;
      min-height:42px;
      border-radius:999px;
      font-weight:800;
      font-size:.92rem;
      transition:transform var(--transition),box-shadow var(--transition),background var(--transition),border-color var(--transition),color var(--transition);
      white-space:nowrap;
    }
    .btn-primary{
      background:var(--brand);
      color:white;
      padding:.72rem 1.08rem;
      box-shadow:var(--shadow-soft);
    }
    .btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 18px 48px rgba(47,127,234,.22)}
    .btn-secondary{
      background:white;
      color:var(--brand-dark);
      border:1px solid rgba(47,127,234,.24);
      padding:.68rem 1rem;
    }
    .btn-secondary:hover{border-color:rgba(47,127,234,.46);background:#F8FBFF;transform:translateY(-2px);box-shadow:0 12px 26px rgba(15,23,42,.07)}
    .btn-ghost{
      background:#F1F7FF;
      color:#1E3A5F;
      padding:.66rem .95rem;
    }
    .btn-ghost:hover{background:#E4F0FF;color:var(--brand-dark);transform:translateY(-1px)}
    .footer-link{
      display:inline-flex;
      align-items:center;
      min-height:36px;
      padding:0 12px;
      border-radius:999px;
      color:#526174;
      background:#F7FAFE;
      border:1px solid #E6EEF8;
      transition:all var(--transition);
    }
    .footer-link:hover{color:var(--brand-dark);border-color:rgba(47,127,234,.30);transform:translateY(-1px)}
    .section{padding:72px 0}
    .section-tight{padding:48px 0}
    .shell{width:100%;max-width:var(--max);margin:0 auto;padding:0 1rem}
    @media (min-width:640px){.shell{padding:0 1.5rem}}
    @media (min-width:1024px){.shell{padding:0 2rem}}
    .card{
      background:rgba(255,255,255,.94);
      border:1px solid rgba(221,231,243,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
      transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
    }
    .card:hover{transform:translateY(-2px);box-shadow:0 24px 62px rgba(15,23,42,.10);border-color:rgba(47,127,234,.20)}
    .badge{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      border-radius:999px;
      padding:.36rem .7rem;
      font-size:.78rem;
      font-weight:800;
      color:#245B93;
      background:#EAF3FF;
      border:1px solid rgba(47,127,234,.12);
      white-space:nowrap;
    }
    .badge.mint{color:#126B5B;background:#EAFBF6;border-color:rgba(81,191,166,.20)}
    .badge.gray{color:#526174;background:#F7FAFE;border-color:#E6EEF8}
    .hero-panel{
      position:relative;
      overflow:hidden;
      border-radius:34px;
      border:1px solid rgba(221,231,243,.95);
      background:
        linear-gradient(135deg,rgba(255,255,255,.96),rgba(239,247,255,.94)),
        radial-gradient(circle at 90% 0%,rgba(47,127,234,.15),transparent 36%);
      box-shadow:var(--shadow);
    }
    .hero-panel:before{
      content:"";
      position:absolute;
      inset:auto -70px -70px auto;
      width:240px;
      height:240px;
      border-radius:999px;
      background:rgba(81,191,166,.13);
      filter:blur(2px);
    }
    .count-ring{
      width:116px;
      height:116px;
      border-radius:999px;
      display:grid;
      place-items:center;
      background:
        conic-gradient(var(--brand) 0 72%, #D9E8FA 72% 100%);
      box-shadow:0 18px 45px rgba(47,127,234,.18);
      position:relative;
    }
    .count-ring:after{
      content:"";
      position:absolute;
      inset:10px;
      border-radius:999px;
      background:white;
      box-shadow:inset 0 0 0 1px #E6EEF8;
    }
    .count-ring span{position:relative;z-index:1}
    .list-item{
      border:1px solid rgba(221,231,243,.95);
      border-radius:24px;
      background:white;
      padding:1.1rem;
      box-shadow:0 12px 32px rgba(15,23,42,.05);
      transition:all var(--transition);
    }
    .list-item:hover{transform:translateX(2px);border-color:rgba(47,127,234,.24);box-shadow:0 18px 44px rgba(15,23,42,.08)}
    .side-card{
      border-radius:28px;
      border:1px solid rgba(221,231,243,.95);
      background:linear-gradient(180deg,#fff,#F8FBFF);
      box-shadow:var(--shadow);
    }
    .step-line{position:relative}
    .step-line:before{
      content:"";
      position:absolute;
      left:18px;
      top:40px;
      bottom:20px;
      width:2px;
      background:#DCEBFB;
    }
    .step-dot{
      width:38px;
      height:38px;
      border-radius:999px;
      display:grid;
      place-items:center;
      background:#EAF3FF;
      color:var(--brand-dark);
      font-weight:900;
      border:1px solid rgba(47,127,234,.18);
      flex:0 0 auto;
      position:relative;
      z-index:1;
    }
    details.faq{
      border:1px solid rgba(221,231,243,.95);
      border-radius:22px;
      background:white;
      box-shadow:0 12px 34px rgba(15,23,42,.05);
      overflow:hidden;
    }
    details.faq summary{
      cursor:pointer;
      list-style:none;
      padding:1.05rem 1.15rem;
      font-weight:900;
      color:#162235;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
    }
    details.faq summary::-webkit-details-marker{display:none}
    details.faq summary:after{
      content:"+";
      width:28px;
      height:28px;
      border-radius:999px;
      display:grid;
      place-items:center;
      color:var(--brand-dark);
      background:#EAF3FF;
      flex:0 0 auto;
    }
    details.faq[open] summary:after{content:"−"}
    details.faq p{padding:0 1.15rem 1.1rem;margin:0;color:#5B6B80;font-size:.95rem;line-height:1.8}
    .bottom-bar{
      position:fixed;
      left:0;
      right:0;
      bottom:0;
      z-index:60;
      border-top:1px solid rgba(221,231,243,.95);
      background:rgba(255,255,255,.95);
      backdrop-filter:blur(14px);
      box-shadow:0 -16px 36px rgba(15,23,42,.08);
    }
    @media (max-width:1023px){
      .section{padding:56px 0}
      .count-ring{width:104px;height:104px}
    }
    @media (max-width:767px){
      body{padding-bottom:94px}
      .section{padding:44px 0}
      .hero-panel{border-radius:26px}
      .card,.side-card{border-radius:22px}
      .btn-primary,.btn-secondary,.btn-ghost{min-height:40px;font-size:.86rem;padding:.62rem .84rem}
      .step-line:before{display:none}
    }
    @media (max-width:520px){
      .bottom-bar .bar-text{display:none}
      .count-ring{width:92px;height:92px}
      .badge{font-size:.72rem;padding:.32rem .58rem}
    }

/* roulang page: category1 */
:root{
      --brand:#5b8def;
      --brand-deep:#315fd8;
      --brand-soft:#eaf2ff;
      --bg:#f5f8fe;
      --bg-2:#eef4ff;
      --text:#0f172a;
      --muted:#5b6475;
      --line:#dbe4f0;
      --shadow:0 18px 45px rgba(15, 23, 42, 0.08);
      --shadow-soft:0 10px 30px rgba(59, 93, 214, 0.10);
      --radius:24px;
      --radius-lg:28px;
      --max:1240px;
    }
    html{scroll-behavior:smooth}
    body{
      font-family: PingFang SC, Microsoft YaHei, Noto Sans SC, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at top left, rgba(91,141,239,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(81,199,180,.08), transparent 20%),
        linear-gradient(180deg, #ffffff 0%, #f6f9ff 42%, #f7faff 100%);
    }
    ::selection{background:var(--brand-soft); color:var(--brand-deep)}
    .bg-brand{background:var(--brand)}
    .text-brand{color:var(--brand)}
    .border-brand{border-color:rgba(91,141,239,.35)}
    .focus-ring:focus{outline:none; box-shadow:0 0 0 4px rgba(91,141,239,.16)}
    .nav-pill{
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      border:1px solid rgba(148,163,184,.26);
      background:rgba(255,255,255,.92);
      color:#334155;
      border-radius:9999px;
      padding:.68rem 1rem;
      line-height:1;
      transition:all .2s ease;
      box-shadow:0 1px 0 rgba(255,255,255,.8) inset;
    }
    .nav-pill:hover{
      transform:translateY(-1px);
      border-color:rgba(91,141,239,.32);
      color:#1d4ed8;
      box-shadow:var(--shadow-soft);
    }
    .nav-pill.active{
      background:linear-gradient(180deg, #eff6ff 0%, #e7f0ff 100%);
      color:#1d4ed8;
      border-color:rgba(91,141,239,.34);
      box-shadow:0 10px 24px rgba(91,141,239,.11);
    }
    .btn-primary,.btn-secondary{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      border-radius:9999px;
      padding:.85rem 1.15rem;
      font-weight:700;
      transition:all .2s ease;
      white-space:nowrap;
      border:1px solid transparent;
    }
    .btn-primary{
      background:linear-gradient(180deg, var(--brand) 0%, var(--brand-deep) 100%);
      color:#fff;
      box-shadow:0 16px 28px rgba(49,95,216,.18);
    }
    .btn-primary:hover{
      transform:translateY(-1px);
      box-shadow:0 20px 36px rgba(49,95,216,.22);
      color:#fff;
    }
    .btn-secondary{
      background:#fff;
      color:#1d4ed8;
      border-color:rgba(91,141,239,.34);
      box-shadow:0 8px 18px rgba(15,23,42,.04);
    }
    .btn-secondary:hover{
      transform:translateY(-1px);
      border-color:rgba(49,95,216,.4);
      box-shadow:var(--shadow-soft);
      color:#1746c5;
    }
    .footer-link,.chip{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      border-radius:9999px;
      transition:all .2s ease;
    }
    .footer-link{
      padding:.55rem .9rem;
      background:#f8fbff;
      border:1px solid rgba(219,228,240,.9);
      color:#334155;
    }
    .footer-link:hover{
      transform:translateY(-1px);
      border-color:rgba(91,141,239,.34);
      color:#1d4ed8;
      box-shadow:0 10px 24px rgba(15,23,42,.05);
    }
    .chip{
      padding:.45rem .8rem;
      background:var(--brand-soft);
      color:#1d4ed8;
      border:1px solid rgba(91,141,239,.18);
      font-size:.86rem;
      font-weight:600;
    }
    .card-panel{
      background:rgba(255,255,255,.96);
      border:1px solid rgba(219,228,240,.94);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow);
    }
    .mini-card{
      background:#fff;
      border:1px solid rgba(219,228,240,.9);
      border-radius:22px;
      box-shadow:0 12px 28px rgba(15,23,42,.06);
    }
    .hero-grid{
      position:relative;
      isolation:isolate;
    }
    .hero-grid::before{
      content:"";
      position:absolute;
      inset:auto -5% -10% auto;
      width:18rem;
      height:18rem;
      background:radial-gradient(circle, rgba(91,141,239,.16) 0%, rgba(91,141,239,0) 72%);
      z-index:-1;
      pointer-events:none;
    }
    .hero-grid::after{
      content:"";
      position:absolute;
      inset:-10% auto auto -6%;
      width:16rem;
      height:16rem;
      background:radial-gradient(circle, rgba(81,199,180,.10) 0%, rgba(81,199,180,0) 72%);
      z-index:-1;
      pointer-events:none;
    }
    .summary-open > summary::-webkit-details-marker{display:none}
    .summary-open > summary{list-style:none}
    .footer-line{border-top:1px solid rgba(219,228,240,.9)}
    .floating-bar{
      box-shadow:0 -12px 30px rgba(15,23,42,.06);
    }
    .count-pill{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      border-radius:9999px;
      padding:.48rem .82rem;
      background:#fff;
      border:1px solid rgba(219,228,240,.95);
      color:#334155;
    }
    .section-kicker{
      letter-spacing:.12em;
      text-transform:uppercase;
      color:#5b6b84;
      font-size:.72rem;
      font-weight:800;
    }
    .simple-scrollbar::-webkit-scrollbar{height:8px;width:8px}
    .simple-scrollbar::-webkit-scrollbar-thumb{background:#c9d7ee;border-radius:999px}
    .simple-scrollbar::-webkit-scrollbar-track{background:transparent}