/* roulang page: index */
:root{
      --bg:#0b0a12;
      --bg2:#12101b;
      --panel:#171320;
      --panel2:#20182a;
      --line:rgba(255,255,255,.08);
      --text:#f7f3f5;
      --muted:#b8adba;
      --muted2:#8f8796;
      --pink:#e0447a;
      --rose:#ff4d8d;
      --violet:#9b5cff;
      --cyan:#28e0d4;
      --amber:#f5b84b;
      --shadow:0 18px 50px rgba(0,0,0,.35);
      --radius:18px;
      --radius-sm:14px;
      --max:1240px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        linear-gradient(180deg, rgba(19,14,28,.96) 0%, rgba(11,10,18,1) 36%, rgba(11,10,18,1) 100%);
      letter-spacing:0;
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background:
        linear-gradient(120deg, rgba(224,68,122,.14) 0%, transparent 34%),
        linear-gradient(300deg, rgba(155,92,255,.10) 0%, transparent 32%),
        linear-gradient(180deg, rgba(40,224,212,.04), transparent 22%);
      mix-blend-mode:screen;
      opacity:.9;
    }
    body::after{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.18;
      background-image:
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
      background-size: 32px 32px;
      mask-image: linear-gradient(180deg, rgba(0,0,0,.7), rgba(0,0,0,.2) 80%, transparent);
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    ::selection{background:rgba(224,68,122,.35);color:#fff}
    ::-webkit-scrollbar{width:10px;height:10px}
    ::-webkit-scrollbar-track{background:#0f0d16}
    ::-webkit-scrollbar-thumb{background:linear-gradient(180deg,var(--pink),var(--violet));border-radius:999px;border:2px solid #0f0d16}
    .site-shell{position:relative;z-index:1}
    .container-max{
      width:min(var(--max), calc(100% - 32px));
      margin-inline:auto;
    }
    .topbar{
      background:rgba(255,255,255,.95);
      color:#111;
      backdrop-filter:blur(14px);
      border-bottom:1px solid rgba(15,23,42,.08);
      box-shadow:0 8px 24px rgba(15,23,42,.05);
    }
    .brand-mark{
      width:38px;height:38px;
      border-radius:14px;
      background:linear-gradient(135deg,var(--rose),var(--violet));
      box-shadow:0 12px 24px rgba(224,68,122,.25);
      position:relative;
      flex:none;
    }
    .brand-mark::before{
      content:"";
      position:absolute;
      inset:9px;
      border-radius:10px;
      border:1px solid rgba(255,255,255,.55);
    }
    .brand-text{
      font-weight:800;
      color:#0f1020;
      letter-spacing:0;
      line-height:1.1;
    }
    .nav-link{
      position:relative;
      color:#1f2937;
      font-weight:600;
      padding:.65rem .9rem;
      border-radius:999px;
      transition:all .2s ease;
    }
    .nav-link:hover,
    .nav-link:focus-visible{
      background:rgba(224,68,122,.08);
      color:#0f1020;
    }
    .nav-link.active{
      background:linear-gradient(135deg, rgba(224,68,122,.14), rgba(155,92,255,.12));
      color:#0b0a12;
      box-shadow:inset 0 0 0 1px rgba(224,68,122,.18);
    }
    .nav-link[data-slug]::after{
      content:attr(data-slug);
      display:none;
    }
    .btn-primary{
      border:none;
      background:linear-gradient(135deg,var(--rose),var(--violet));
      color:#fff;
      box-shadow:0 14px 28px rgba(224,68,122,.22);
      transition:transform .2s ease, box-shadow .2s ease, filter .2s ease;
    }
    .btn-primary:hover,
    .btn-primary:focus-visible{
      transform:translateY(-1px);
      box-shadow:0 18px 38px rgba(155,92,255,.22);
      filter:brightness(1.05);
    }
    .btn-secondary{
      background:rgba(15,23,42,.72);
      color:#fff;
      border:1px solid rgba(255,255,255,.12);
      transition:transform .2s ease, border-color .2s ease, background .2s ease;
    }
    .btn-secondary:hover,
    .btn-secondary:focus-visible{
      transform:translateY(-1px);
      border-color:rgba(40,224,212,.35);
      background:rgba(30,35,54,.88);
    }
    .ghost-input,
    .dark-input,
    .filter-select{
      width:100%;
      border:1px solid rgba(255,255,255,.12);
      background:rgba(15,20,33,.9);
      color:var(--text);
      outline:none;
      transition:border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .ghost-input::placeholder,
    .dark-input::placeholder{
      color:#8e8597;
    }
    .ghost-input:focus,
    .dark-input:focus,
    .filter-select:focus{
      border-color:rgba(224,68,122,.45);
      box-shadow:0 0 0 4px rgba(224,68,122,.15);
      background:#141826;
    }
    .hero-panel,
    .section-panel{
      background:linear-gradient(180deg, rgba(23,19,32,.98), rgba(18,16,27,.98));
      border:1px solid rgba(255,255,255,.08);
      box-shadow:var(--shadow);
      border-radius:calc(var(--radius) + 4px);
      position:relative;
      overflow:hidden;
    }
    .hero-panel::before,
    .section-panel::before{
      content:"";
      position:absolute;
      inset:0;
      pointer-events:none;
      background:linear-gradient(135deg, rgba(224,68,122,.10), transparent 32%, rgba(40,224,212,.08));
      opacity:.9;
    }
    .panel-inner{
      position:relative;
      z-index:1;
    }
    .energy-line{
      height:4px;
      background:linear-gradient(90deg,var(--rose),var(--violet),var(--cyan));
      border-radius:999px;
      box-shadow:0 0 18px rgba(155,92,255,.35);
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.42rem .75rem;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.12);
      background:rgba(255,255,255,.04);
      color:var(--text);
      font-size:.86rem;
      font-weight:700;
      line-height:1;
      white-space:nowrap;
    }
    .tag.soft{
      background:rgba(255,255,255,.06);
      color:#efe9f2;
    }
    .tag.pink{
      border-color:rgba(224,68,122,.28);
      background:rgba(224,68,122,.12);
    }
    .tag.cyan{
      border-color:rgba(40,224,212,.28);
      background:rgba(40,224,212,.08);
    }
    .section-title{
      font-size:clamp(1.55rem, 3vw, 2.6rem);
      line-height:1.12;
      letter-spacing:0;
      font-weight:900;
      color:#fff;
    }
    .section-copy{
      color:var(--muted);
      line-height:1.75;
      font-size:1rem;
    }
    .hero-title{
      font-size:clamp(2.1rem, 5vw, 4rem);
      line-height:1.06;
      font-weight:900;
      letter-spacing:0;
      text-wrap:balance;
    }
    .hero-copy{
      color:#ddd5e0;
      line-height:1.8;
      font-size:1.04rem;
      max-width:62ch;
    }
    .card{
      background:linear-gradient(180deg, rgba(26,20,36,.98), rgba(21,17,31,.98));
      border:1px solid rgba(255,255,255,.08);
      border-radius:var(--radius);
      box-shadow:0 14px 34px rgba(0,0,0,.2);
      transition:transform .2s ease, border-color .2s ease, box-shadow .2s ease;
      overflow:hidden;
      position:relative;
    }
    .card:hover{
      transform:translateY(-3px);
      border-color:rgba(224,68,122,.28);
      box-shadow:0 18px 42px rgba(0,0,0,.28);
    }
    .card::before{
      content:"";
      position:absolute;
      inset:0 0 auto 0;
      height:3px;
      background:linear-gradient(90deg,var(--rose),var(--violet),var(--cyan));
      opacity:.9;
    }
    .card-flat::before{display:none}
    .mini-stat{
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      border-radius:16px;
    }
    .soft-list li{
      position:relative;
      padding-left:1.1rem;
      color:#e4dbe6;
      line-height:1.7;
    }
    .soft-list li::before{
      content:"";
      position:absolute;
      left:0;
      top:.72rem;
      width:.42rem;
      height:.42rem;
      border-radius:999px;
      background:linear-gradient(135deg,var(--rose),var(--cyan));
      box-shadow:0 0 0 4px rgba(224,68,122,.1);
    }
    .timeline{
      position:relative;
      padding-left:1.5rem;
    }
    .timeline::before{
      content:"";
      position:absolute;
      left:.35rem;
      top:.3rem;
      bottom:.3rem;
      width:1px;
      background:linear-gradient(180deg, rgba(224,68,122,.7), rgba(40,224,212,.3));
    }
    .timeline-item{
      position:relative;
      padding-bottom:1.25rem;
    }
    .timeline-item::before{
      content:"";
      position:absolute;
      left:-1.05rem;
      top:.45rem;
      width:.75rem;
      height:.75rem;
      border-radius:999px;
      background:linear-gradient(135deg,var(--rose),var(--violet));
      box-shadow:0 0 0 4px rgba(224,68,122,.14);
    }
    .list-link{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:.8rem;
      padding:.95rem 0;
      border-bottom:1px solid rgba(255,255,255,.08);
      transition:color .2s ease;
    }
    .list-link:hover{color:#fff}
    .list-link small{color:var(--muted2)}
    .pill{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.26rem .6rem;
      border-radius:999px;
      font-size:.78rem;
      font-weight:700;
      border:1px solid rgba(255,255,255,.08);
      color:#efe7f0;
      background:rgba(255,255,255,.05);
    }
    .pill.pink{background:rgba(224,68,122,.12);border-color:rgba(224,68,122,.25)}
    .pill.cyan{background:rgba(40,224,212,.10);border-color:rgba(40,224,212,.25)}
    .pill.amber{background:rgba(245,184,75,.12);border-color:rgba(245,184,75,.25)}
    .faq-item{
      border:1px solid rgba(255,255,255,.08);
      border-radius:16px;
      background:rgba(255,255,255,.04);
      overflow:hidden;
    }
    .faq-trigger{
      width:100%;
      text-align:left;
      padding:1rem 1.1rem;
      background:transparent;
      border:none;
      color:#fff;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      cursor:pointer;
      font-weight:800;
    }
    .faq-answer{
      padding:0 1.1rem 1rem 1.1rem;
      color:#d9d0dc;
      line-height:1.8;
      display:none;
    }
    .faq-item.open .faq-answer{display:block}
    .faq-icon{
      width:1.8rem;
      height:1.8rem;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.12);
      display:grid;
      place-items:center;
      flex:none;
      color:#efe9f2;
      background:rgba(255,255,255,.05);
      transition:transform .2s ease;
    }
    .faq-item.open .faq-icon{transform:rotate(45deg)}
    .gradient-text{
      background:linear-gradient(90deg,#fff 0%, #ffd3e1 35%, #f6b8ff 58%, #aeefff 100%);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }
    .thumbnail{
      border-radius:18px;
      background:
        radial-gradient(circle at 20% 20%, rgba(224,68,122,.24), transparent 28%),
        radial-gradient(circle at 78% 18%, rgba(40,224,212,.18), transparent 26%),
        linear-gradient(145deg, rgba(224,68,122,.34), rgba(155,92,255,.24) 38%, rgba(32,24,42,.98) 82%);
      border:1px solid rgba(255,255,255,.1);
      min-height:150px;
      position:relative;
      overflow:hidden;
    }
    .thumbnail::after{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(135deg, rgba(255,255,255,.12), transparent 30%),
        linear-gradient(180deg, transparent, rgba(11,10,18,.42));
      opacity:.95;
    }
    .micro-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:.75rem;
    }
    .footer-link{
      color:#d8cfe0;
      transition:color .2s ease;
    }
    .footer-link:hover,
    .footer-link:focus-visible{
      color:#fff;
    }
    .sticky-shadow{
      box-shadow:0 10px 25px rgba(15,23,42,.08);
    }
    .mobile-menu{
      display:none;
    }
    @media (max-width: 1023px){
      .desktop-nav,
      .desktop-search{
        display:none !important;
      }
      .mobile-menu{display:block}
    }
    @media (max-width: 767px){
      .container-max{width:min(var(--max), calc(100% - 20px))}
      .hero-title{font-size:clamp(2rem, 10vw, 2.75rem)}
      .section-title{font-size:clamp(1.45rem, 6vw, 2.1rem)}
    }

/* roulang page: category2 */
:root {
      --bg: #0b0a12;
      --bg-soft: #12101b;
      --panel: #171320;
      --panel-2: #20182a;
      --text: #f7f3f5;
      --muted: #cfc5d4;
      --subtle: #a99fb1;
      --line: rgba(255,255,255,.10);
      --line-strong: rgba(40,224,212,.42);
      --pink: #ff4d8d;
      --pink-2: #e0447a;
      --purple: #9b5cff;
      --cyan: #28e0d4;
      --amber: #f5b84b;
      --white: #ffffff;
      --radius: 18px;
      --radius-sm: 12px;
      --shadow: 0 20px 70px rgba(0,0,0,.38);
      --shadow-soft: 0 14px 42px rgba(0,0,0,.26);
      --font: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      min-height: 100vh;
      color: var(--text);
      background:
        linear-gradient(135deg, rgba(255,77,141,.10), transparent 28%),
        linear-gradient(225deg, rgba(40,224,212,.08), transparent 30%),
        radial-gradient(circle at 50% 0%, rgba(155,92,255,.20), transparent 34%),
        var(--bg);
      font-family: var(--font);
      line-height: 1.7;
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: .24;
      background-image:
        linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
      background-size: 44px 44px;
      mask-image: linear-gradient(to bottom, black, transparent 78%);
      z-index: -1;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease, box-shadow .2s ease;
    }

    button,
    input,
    select,
    textarea {
      font: inherit;
    }

    button {
      cursor: pointer;
    }

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

    ::selection {
      background: rgba(40,224,212,.28);
      color: #fff;
    }

    :focus-visible {
      outline: 3px solid rgba(40,224,212,.55);
      outline-offset: 3px;
    }

    .container-max {
      width: min(100% - 32px, 1220px);
      margin-inline: auto;
    }

    .topbar {
      background: rgba(255,255,255,.96);
      color: #171320;
      border-bottom: 1px solid rgba(15,23,42,.08);
      box-shadow: 0 10px 28px rgba(12,10,18,.08);
      backdrop-filter: blur(18px);
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      position: relative;
      flex: 0 0 auto;
      background:
        conic-gradient(from 140deg, var(--pink), var(--purple), var(--cyan), var(--pink));
      box-shadow: 0 10px 24px rgba(224,68,122,.28);
    }

    .brand-mark::before {
      content: "";
      position: absolute;
      inset: 8px;
      border-radius: 10px;
      background: rgba(255,255,255,.92);
      clip-path: polygon(50% 0, 92% 28%, 74% 100%, 26% 100%, 8% 28%);
    }

    .brand-text {
      font-weight: 900;
      letter-spacing: 0;
      color: #171320;
      white-space: nowrap;
    }

    .nav-link {
      display: inline-flex;
      align-items: center;
      min-height: 38px;
      padding: 8px 14px;
      border-radius: 999px;
      color: #3b3444;
      font-size: 14px;
      font-weight: 800;
      line-height: 1;
    }

    .nav-link:hover {
      color: #111018;
      background: rgba(155,92,255,.10);
    }

    .nav-link.active {
      color: #fff;
      background: linear-gradient(135deg, var(--pink), var(--purple));
      box-shadow: 0 12px 24px rgba(224,68,122,.22);
    }

    .ghost-input {
      width: 100%;
      border: 1px solid rgba(15,23,42,.10);
      background: #f4f2f5;
      color: #171320;
      transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }

    .ghost-input::placeholder {
      color: #777280;
    }

    .ghost-input:focus {
      border-color: rgba(224,68,122,.55);
      background: #fff;
      box-shadow: 0 0 0 4px rgba(224,68,122,.13);
      outline: none;
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--pink), var(--purple));
      box-shadow: 0 16px 38px rgba(224,68,122,.28);
      transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
      white-space: nowrap;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      filter: brightness(1.08);
      box-shadow: 0 18px 46px rgba(255,77,141,.34);
    }

    .btn-secondary {
      color: var(--text);
      border: 1px solid rgba(40,224,212,.45);
      background: rgba(40,224,212,.08);
      box-shadow: inset 0 0 0 1px rgba(255,255,255,.03);
      transition: transform .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease;
      white-space: nowrap;
    }

    .btn-secondary:hover {
      transform: translateY(-2px);
      border-color: rgba(40,224,212,.78);
      background: rgba(40,224,212,.14);
      box-shadow: 0 16px 34px rgba(40,224,212,.12);
    }

    .section {
      padding: 82px 0;
    }

    .section-tight {
      padding: 56px 0;
    }

    .hero {
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--line);
      background:
        linear-gradient(130deg, rgba(255,77,141,.16), transparent 28%),
        linear-gradient(305deg, rgba(40,224,212,.14), transparent 34%),
        linear-gradient(180deg, rgba(18,16,27,.92), rgba(11,10,18,.98));
    }

    .hero::after {
      content: "";
      position: absolute;
      inset: auto -10% -1px -10%;
      height: 120px;
      background: linear-gradient(to bottom, transparent, var(--bg));
      pointer-events: none;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: 1px solid rgba(255,255,255,.12);
      background: rgba(255,255,255,.06);
      color: #f6edf2;
      border-radius: 999px;
      padding: 8px 12px;
      font-size: 13px;
      font-weight: 800;
      line-height: 1;
    }

    .badge::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--cyan);
      box-shadow: 0 0 16px rgba(40,224,212,.85);
    }

    .panel {
      background: linear-gradient(180deg, rgba(32,24,42,.94), rgba(23,19,32,.98));
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }

    .panel-cyan {
      border-color: rgba(40,224,212,.28);
      box-shadow: 0 20px 70px rgba(0,0,0,.38), inset 0 1px 0 rgba(40,224,212,.12);
    }

    .task-card {
      position: relative;
      overflow: hidden;
      background: linear-gradient(180deg, rgba(32,24,42,.94), rgba(18,16,27,.96));
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow-soft);
      transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease, background .22s ease;
    }

    .task-card::before {
      content: "";
      position: absolute;
      inset: 0 0 auto 0;
      height: 3px;
      background: linear-gradient(90deg, var(--cyan), var(--purple), var(--pink));
      opacity: .84;
    }

    .task-card:hover {
      transform: translateY(-3px);
      border-color: rgba(40,224,212,.36);
      box-shadow: 0 24px 72px rgba(0,0,0,.42), 0 0 0 1px rgba(40,224,212,.12);
    }

    .chip {
      display: inline-flex;
      align-items: center;
      min-height: 30px;
      padding: 6px 11px;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,.10);
      background: rgba(255,255,255,.055);
      color: #e8dfea;
      font-size: 13px;
      font-weight: 700;
      transition: background .2s ease, border-color .2s ease, color .2s ease;
    }

    .chip:hover,
    .chip.active {
      color: #fff;
      border-color: rgba(40,224,212,.46);
      background: rgba(40,224,212,.12);
    }

    .field-dark {
      width: 100%;
      border: 1px solid rgba(255,255,255,.12);
      background: rgba(9,8,18,.62);
      color: #fff;
      border-radius: 999px;
      padding: 12px 15px;
      transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }

    .field-dark:focus {
      outline: none;
      border-color: rgba(40,224,212,.62);
      box-shadow: 0 0 0 4px rgba(40,224,212,.13);
      background: rgba(9,8,18,.84);
    }

    .field-dark option {
      color: #171320;
    }

    .mini-cover {
      min-height: 132px;
      border-radius: 16px;
      border: 1px solid rgba(255,255,255,.10);
      background:
        linear-gradient(135deg, rgba(40,224,212,.18), transparent 28%),
        linear-gradient(315deg, rgba(255,77,141,.20), transparent 36%),
        repeating-linear-gradient(135deg, rgba(255,255,255,.08) 0 1px, transparent 1px 12px),
        #15111f;
      position: relative;
      overflow: hidden;
    }

    .mini-cover::after {
      content: "18+";
      position: absolute;
      right: 12px;
      top: 12px;
      padding: 4px 8px;
      border-radius: 999px;
      background: rgba(9,8,18,.72);
      border: 1px solid rgba(255,255,255,.13);
      color: #fff;
      font-size: 12px;
      font-weight: 900;
    }

    .metric {
      border-radius: 16px;
      border: 1px solid rgba(255,255,255,.10);
      background: rgba(255,255,255,.05);
      padding: 16px;
    }

    .step-item {
      display: grid;
      grid-template-columns: 42px 1fr;
      gap: 14px;
      align-items: start;
      padding: 18px;
      border-radius: 16px;
      border: 1px solid rgba(255,255,255,.10);
      background: rgba(255,255,255,.045);
    }

    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 42px;
      height: 42px;
      border-radius: 14px;
      color: #071314;
      background: linear-gradient(135deg, var(--cyan), #b4fff8);
      font-weight: 900;
    }

    .compare-row {
      display: grid;
      grid-template-columns: 1.1fr 1fr 1fr;
      gap: 1px;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,.10);
      border-radius: 16px;
      background: rgba(255,255,255,.10);
    }

    .compare-cell {
      background: rgba(23,19,32,.96);
      padding: 16px;
      color: var(--muted);
    }

    .compare-head {
      color: #fff;
      font-weight: 900;
      background: rgba(40,224,212,.10);
    }

    .faq-item {
      border: 1px solid rgba(255,255,255,.10);
      background: rgba(23,19,32,.92);
      border-radius: 16px;
      overflow: hidden;
    }

    .faq-button {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 20px;
      color: #fff;
      font-weight: 900;
      text-align: left;
    }

    .faq-answer {
      display: none;
      padding: 0 20px 20px;
      color: var(--muted);
      font-size: 15px;
    }

    .faq-item.open .faq-answer {
      display: block;
    }

    .faq-icon {
      flex: 0 0 auto;
      width: 28px;
      height: 28px;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #071314;
      background: var(--cyan);
      font-weight: 900;
    }

    .faq-item.open .faq-icon {
      background: var(--pink);
      color: #fff;
    }

    .cta-band {
      position: relative;
      overflow: hidden;
      border-radius: 26px;
      border: 1px solid rgba(255,255,255,.12);
      background:
        linear-gradient(120deg, rgba(255,77,141,.22), transparent 34%),
        linear-gradient(300deg, rgba(40,224,212,.20), transparent 36%),
        #15111f;
      box-shadow: var(--shadow);
    }

    .footer-link {
      color: #cfc5d4;
      transition: color .2s ease, transform .2s ease;
    }

    .footer-link:hover {
      color: #fff;
      transform: translateX(3px);
    }

    .mobile-menu {
      display: none;
    }

    @media (max-width: 1024px) {
      .desktop-nav,
      .desktop-search {
        display: none !important;
      }

      .mobile-menu {
        display: inline-flex;
      }

      #mobileMenu.mobile-menu {
        display: block;
      }

      #mobileMenu.hidden {
        display: none;
      }

      .section {
        padding: 64px 0;
      }

      .compare-row {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .container-max {
        width: min(100% - 24px, 1220px);
      }

      .section {
        padding: 54px 0;
      }

      .section-tight {
        padding: 42px 0;
      }

      .brand-mark {
        width: 34px;
        height: 34px;
      }

      .nav-link {
        width: 100%;
        justify-content: center;
      }

      .hero-title {
        font-size: clamp(2rem, 10vw, 2.65rem);
        line-height: 1.12;
      }

      .step-item {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 520px) {
      .brand-text {
        max-width: 190px;
        white-space: normal;
        line-height: 1.15;
      }

      .btn-primary,
      .btn-secondary {
        width: 100%;
      }

      .faq-button {
        align-items: flex-start;
      }
    }

/* roulang page: category1 */
:root {
      --bg: #0b0a12;
      --bg-deep: #090812;
      --panel: #171320;
      --panel-2: #20182a;
      --panel-3: #251b32;
      --text: #f7f3f5;
      --muted: #cfc5d4;
      --weak: #a99fb1;
      --line: rgba(255,255,255,.10);
      --line-strong: rgba(255,255,255,.18);
      --rose: #ff4d8d;
      --rose-2: #e0447a;
      --violet: #9b5cff;
      --cyan: #28e0d4;
      --amber: #f5b84b;
      --radius: 18px;
      --radius-sm: 12px;
      --shadow: 0 18px 50px rgba(0,0,0,.35);
      --shadow-soft: 0 12px 30px rgba(0,0,0,.24);
      --container: 1220px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text);
      background:
        linear-gradient(135deg, rgba(224,68,122,.16), transparent 28%),
        linear-gradient(225deg, rgba(40,224,212,.10), transparent 30%),
        var(--bg);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: .28;
      background-image:
        linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
      background-size: 38px 38px;
      mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), transparent 78%);
      z-index: -1;
    }

    a { color: inherit; text-decoration: none; }
    img, svg { display: block; max-width: 100%; }
    button, input, select, textarea { font: inherit; }
    button { cursor: pointer; }
    ::selection { background: rgba(255,77,141,.35); color: #fff; }

    .container-max {
      width: min(100% - 32px, var(--container));
      margin-inline: auto;
    }

    .topbar {
      background: rgba(255,255,255,.96);
      color: #16121d;
      border-bottom: 1px solid rgba(15, 23, 42, .08);
      box-shadow: 0 10px 28px rgba(13, 10, 18, .10);
      backdrop-filter: blur(18px);
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 14px;
      background:
        radial-gradient(circle at 70% 22%, var(--cyan), transparent 24%),
        linear-gradient(135deg, var(--rose), var(--violet));
      box-shadow: 0 10px 24px rgba(224,68,122,.35);
      position: relative;
      flex: 0 0 auto;
    }

    .brand-mark::after {
      content: "";
      position: absolute;
      inset: 10px;
      border: 2px solid rgba(255,255,255,.82);
      border-radius: 9px;
      transform: rotate(10deg);
    }

    .brand-text {
      font-weight: 900;
      color: #15111d;
      line-height: 1.15;
      white-space: nowrap;
    }

    .nav-link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 40px;
      padding: 0 14px;
      border-radius: 999px;
      color: #40374b;
      font-size: 14px;
      font-weight: 700;
      transition: color .2s ease, background .2s ease, box-shadow .2s ease;
    }

    .nav-link:hover,
    .nav-link:focus-visible {
      color: #12101b;
      background: #f3edf4;
      outline: none;
    }

    .nav-link.active {
      color: #fff;
      background: linear-gradient(135deg, var(--rose-2), var(--violet));
      box-shadow: 0 10px 22px rgba(224,68,122,.28);
    }

    .ghost-input {
      width: 100%;
      border: 1px solid rgba(15, 23, 42, .10);
      background: #f5f2f6;
      color: #171320;
      outline: none;
      transition: border .2s ease, box-shadow .2s ease, background .2s ease;
    }

    .ghost-input::placeholder { color: #756b7d; }
    .ghost-input:focus {
      border-color: rgba(224,68,122,.55);
      box-shadow: 0 0 0 4px rgba(224,68,122,.13);
      background: #fff;
    }

    .btn-primary,
    .btn-secondary,
    .btn-quiet {
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, filter .2s ease, background .2s ease;
      white-space: nowrap;
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--rose), var(--violet));
      box-shadow: 0 16px 34px rgba(224,68,122,.32);
    }

    .btn-primary:hover,
    .btn-primary:focus-visible {
      transform: translateY(-2px);
      filter: brightness(1.08);
      box-shadow: 0 18px 38px rgba(255,77,141,.38);
      outline: none;
    }

    .btn-secondary {
      color: var(--text);
      border: 1px solid rgba(40,224,212,.42);
      background: rgba(40,224,212,.08);
    }

    .btn-secondary:hover,
    .btn-secondary:focus-visible {
      border-color: rgba(40,224,212,.85);
      box-shadow: 0 0 0 4px rgba(40,224,212,.10);
      transform: translateY(-2px);
      outline: none;
    }

    .btn-quiet {
      color: var(--muted);
      border: 1px solid var(--line);
      background: rgba(255,255,255,.04);
    }

    .btn-quiet:hover,
    .btn-quiet:focus-visible {
      color: #fff;
      border-color: rgba(255,77,141,.55);
      background: rgba(255,77,141,.10);
      outline: none;
    }

    .desktop-nav,
    .desktop-search { display: flex; }
    .mobile-menu { display: none; }

    .hero {
      position: relative;
      overflow: hidden;
      padding: 58px 0 42px;
      background:
        radial-gradient(circle at 16% 16%, rgba(255,77,141,.26), transparent 32%),
        radial-gradient(circle at 78% 24%, rgba(155,92,255,.24), transparent 34%),
        linear-gradient(180deg, rgba(18,16,27,.72), rgba(11,10,18,.98));
      border-bottom: 1px solid var(--line);
    }

    .hero::after {
      content: "";
      position: absolute;
      inset: auto 0 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255,77,141,.85), rgba(40,224,212,.65), transparent);
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: #ffe7ef;
      background: rgba(255,77,141,.12);
      border: 1px solid rgba(255,77,141,.30);
      border-radius: 999px;
      padding: 8px 12px;
      font-size: 13px;
      font-weight: 800;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--amber);
      box-shadow: 0 0 18px rgba(245,184,75,.78);
    }

    .hero-title {
      margin-top: 18px;
      max-width: 850px;
      font-size: clamp(2.1rem, 5vw, 4rem);
      line-height: 1.08;
      font-weight: 900;
      letter-spacing: 0;
    }

    .hero-copy {
      margin-top: 18px;
      max-width: 760px;
      color: var(--muted);
      font-size: 16px;
      line-height: 1.85;
    }

    .panel {
      border: 1px solid var(--line);
      background: linear-gradient(180deg, rgba(32,24,42,.92), rgba(18,16,27,.94));
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }

    .panel-glow {
      position: relative;
      overflow: hidden;
    }

    .panel-glow::before {
      content: "";
      position: absolute;
      inset: 0 0 auto;
      height: 3px;
      background: linear-gradient(90deg, var(--rose), var(--violet), var(--cyan));
    }

    .progress-track {
      height: 12px;
      border-radius: 999px;
      overflow: hidden;
      background: rgba(255,255,255,.08);
      border: 1px solid rgba(255,255,255,.08);
    }

    .progress-fill {
      height: 100%;
      width: 68%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--rose), var(--amber), var(--cyan));
      box-shadow: 0 0 20px rgba(255,77,141,.35);
    }

    .chip,
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 700;
      line-height: 1;
      white-space: nowrap;
    }

    .chip {
      padding: 9px 12px;
      color: #f7eef4;
      border: 1px solid rgba(255,255,255,.12);
      background: rgba(255,255,255,.055);
    }

    .chip:hover {
      border-color: rgba(255,77,141,.55);
      background: rgba(255,77,141,.10);
    }

    .badge {
      padding: 7px 10px;
      color: #101018;
      background: var(--cyan);
    }

    .badge-rose {
      color: #fff;
      background: rgba(255,77,141,.18);
      border: 1px solid rgba(255,77,141,.36);
    }

    .section {
      padding: 72px 0;
    }

    .section-tight {
      padding: 52px 0;
    }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 26px;
    }

    .section-kicker {
      color: var(--cyan);
      font-size: 13px;
      font-weight: 900;
    }

    .section-title {
      margin-top: 8px;
      color: #fff;
      font-size: clamp(1.55rem, 3.2vw, 2.55rem);
      line-height: 1.15;
      font-weight: 900;
    }

    .section-desc {
      max-width: 660px;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.8;
    }

    .filter-card,
    .task-card,
    .scenario-card,
    .faq-item,
    .price-card {
      border: 1px solid var(--line);
      background: rgba(23,19,32,.86);
      border-radius: var(--radius);
      box-shadow: var(--shadow-soft);
      transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease, background .22s ease;
    }

    .filter-card:hover,
    .task-card:hover,
    .scenario-card:hover,
    .price-card:hover {
      transform: translateY(-3px);
      border-color: rgba(255,77,141,.48);
      box-shadow: 0 22px 54px rgba(0,0,0,.38);
      background: rgba(32,24,42,.94);
    }

    .energy-line {
      height: 3px;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--rose), var(--violet), var(--cyan));
    }

    .dark-field,
    .dark-select,
    .dark-textarea {
      width: 100%;
      border: 1px solid rgba(255,255,255,.12);
      color: var(--text);
      background: rgba(9,8,18,.72);
      outline: none;
      transition: border .2s ease, box-shadow .2s ease, background .2s ease;
    }

    .dark-field::placeholder,
    .dark-textarea::placeholder { color: #8f8498; }

    .dark-field:focus,
    .dark-select:focus,
    .dark-textarea:focus {
      border-color: rgba(40,224,212,.75);
      box-shadow: 0 0 0 4px rgba(40,224,212,.12);
      background: rgba(9,8,18,.92);
    }

    .list-dot {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--rose);
      box-shadow: 0 0 14px rgba(255,77,141,.55);
      flex: 0 0 auto;
      margin-top: 10px;
    }

    .visual-tile {
      min-height: 132px;
      border-radius: 16px;
      border: 1px solid rgba(255,255,255,.10);
      background:
        linear-gradient(135deg, rgba(255,77,141,.26), transparent 42%),
        linear-gradient(225deg, rgba(40,224,212,.18), transparent 44%),
        rgba(255,255,255,.045);
      position: relative;
      overflow: hidden;
    }

    .visual-tile::before {
      content: "";
      position: absolute;
      inset: 14px;
      border: 1px solid rgba(255,255,255,.10);
      border-radius: 14px;
    }

    .visual-tile::after {
      content: "";
      position: absolute;
      left: 18px;
      right: 18px;
      bottom: 18px;
      height: 8px;
      border-radius: 999px;
      background: linear-gradient(90deg, rgba(255,255,255,.28), rgba(255,255,255,.04));
    }

    .compare-row {
      display: grid;
      grid-template-columns: 1.1fr 1fr 1fr;
      gap: 1px;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--line);
    }

    .compare-cell {
      background: rgba(23,19,32,.92);
      padding: 18px;
      min-height: 86px;
    }

    .faq-button {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      text-align: left;
      color: #fff;
      font-weight: 800;
      padding: 20px;
      border-radius: var(--radius);
    }

    .faq-button:focus-visible {
      outline: 3px solid rgba(40,224,212,.45);
      outline-offset: 3px;
    }

    .faq-answer {
      display: none;
      padding: 0 20px 20px;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.8;
    }

    .faq-item.open .faq-answer { display: block; }
    .faq-icon { transition: transform .2s ease; }
    .faq-item.open .faq-icon { transform: rotate(45deg); }

    .footer-link {
      color: #cfc5d4;
      transition: color .2s ease, transform .2s ease;
    }

    .footer-link:hover,
    .footer-link:focus-visible {
      color: #fff;
      transform: translateX(3px);
      outline: none;
    }

    @media (max-width: 1024px) {
      .desktop-nav,
      .desktop-search { display: none; }
      .mobile-menu { display: inline-flex; }
      .mobile-menu.hidden { display: none; }
      .mobile-menu:not(.hidden) { display: block; }
      .section { padding: 58px 0; }
      .section-head {
        align-items: flex-start;
        flex-direction: column;
      }
      .compare-row { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .container-max { width: min(100% - 24px, var(--container)); }
      .hero { padding: 42px 0 30px; }
      .hero-title { font-size: clamp(2rem, 10vw, 2.55rem); }
      .hero-copy { font-size: 15px; }
      .section { padding: 48px 0; }
      .section-tight { padding: 40px 0; }
      .brand-mark { width: 34px; height: 34px; border-radius: 12px; }
      .brand-text { white-space: normal; }
      .faq-button { padding: 18px; }
    }

    @media (max-width: 520px) {
      .btn-primary,
      .btn-secondary,
      .btn-quiet {
        width: 100%;
        justify-content: center;
      }
      .hero-actions,
      .cta-actions {
        width: 100%;
      }
      .chip { font-size: 12px; padding: 8px 10px; }
      .panel { border-radius: 16px; }
    }