/* roulang page: index */
:root{
      --color-primary:#7C5CFF;
      --color-primary-deep:#6546DD;
      --color-primary-soft:#F2EAFE;
      --color-lilac:#D8CCFF;
      --color-apricot:#FFB86B;
      --color-ink:#2D2938;
      --color-text:#433D52;
      --color-muted:#7B748A;
      --color-line:rgba(124,92,255,.14);
      --color-card:rgba(255,255,255,.86);
      --color-bg:#FBFAFF;
      --color-bg-2:#F7F3FF;
      --shadow-soft:0 18px 48px rgba(71,54,124,.10);
      --shadow-hover:0 22px 58px rgba(71,54,124,.16);
      --radius-sm:12px;
      --radius-md:18px;
      --radius-lg:28px;
      --radius-xl:36px;
      --font-main:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
      --speed:.24s ease;
      --sidebar:104px;
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:var(--font-main);
      color:var(--color-text);
      background:
        radial-gradient(circle at 18% 8%, rgba(216,204,255,.58), transparent 34%),
        radial-gradient(circle at 88% 18%, rgba(255,184,107,.18), transparent 28%),
        linear-gradient(180deg,var(--color-bg) 0%,#fff 52%,var(--color-bg-2) 100%);
      line-height:1.8;
      min-width:320px;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:color var(--speed),background var(--speed),box-shadow var(--speed),transform var(--speed)}
    a:hover{color:var(--color-primary)}
    img{max-width:100%;height:auto;display:block}
    button,input{font-family:inherit}
    button{cursor:pointer}
    :focus-visible{
      outline:3px solid rgba(124,92,255,.28);
      outline-offset:3px;
      border-radius:12px;
    }
    .site-shell{min-height:100vh}
    .desktop-sidebar{
      position:fixed;
      inset:0 auto 0 0;
      width:var(--sidebar);
      padding:18px 14px;
      background:rgba(255,255,255,.78);
      backdrop-filter:blur(18px);
      border-right:1px solid var(--color-line);
      z-index:50;
      display:flex;
      flex-direction:column;
      align-items:center;
      justify-content:space-between;
      box-shadow:10px 0 32px rgba(71,54,124,.06);
    }
    .brand-mark{
      width:68px;
      min-height:74px;
      display:flex;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:7px;
      border-radius:24px;
      background:linear-gradient(145deg,#fff,var(--color-primary-soft));
      border:1px solid rgba(124,92,255,.18);
      box-shadow:var(--shadow-soft);
      color:var(--color-ink);
      font-weight:800;
      letter-spacing:.04em;
      text-align:center;
    }
    .brand-mark .petal{
      width:34px;height:34px;border-radius:50% 50% 50% 12px;
      background:linear-gradient(135deg,var(--color-primary),#A88BFF);
      transform:rotate(-28deg);
      position:relative;
      box-shadow:0 10px 22px rgba(124,92,255,.26);
    }
    .brand-mark .petal:after{
      content:"";
      position:absolute;
      width:14px;height:14px;border-radius:50%;
      right:6px;top:6px;
      background:rgba(255,255,255,.62);
    }
    .brand-mark span{font-size:12px;line-height:1.25}
    .side-nav{
      width:100%;
      display:flex;
      flex-direction:column;
      align-items:center;
      gap:12px;
      margin-top:26px;
    }
    .side-link{
      width:74px;
      min-height:66px;
      border-radius:22px;
      display:flex;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:6px;
      color:var(--color-muted);
      font-size:12px;
      font-weight:700;
      position:relative;
    }
    .side-link .nav-ico{
      font-size:20px;
      line-height:1;
      transition:transform var(--speed), color var(--speed);
    }
    .side-link:hover{
      background:rgba(124,92,255,.08);
      color:var(--color-primary-deep);
      transform:translateY(-2px);
    }
    .side-link:hover .nav-ico{transform:translateY(-1px)}
    .side-link.active{
      background:linear-gradient(145deg,rgba(124,92,255,.16),rgba(242,234,254,.86));
      color:var(--color-primary-deep);
      box-shadow:inset 0 0 0 1px rgba(124,92,255,.18);
    }
    .side-link.active:before{
      content:"";
      position:absolute;
      left:-14px;
      width:4px;
      height:34px;
      border-radius:0 999px 999px 0;
      background:var(--color-primary);
    }
    .sidebar-foot{
      writing-mode:vertical-rl;
      transform:rotate(180deg);
      color:#9B94AA;
      font-size:12px;
      letter-spacing:.16em;
    }
    .mobile-header{
      display:none;
      position:sticky;
      top:0;
      z-index:60;
      height:66px;
      padding:0 16px;
      align-items:center;
      justify-content:space-between;
      background:rgba(255,255,255,.88);
      backdrop-filter:blur(16px);
      border-bottom:1px solid var(--color-line);
    }
    .mobile-logo{
      display:flex;
      align-items:center;
      gap:10px;
      font-weight:800;
      color:var(--color-ink);
    }
    .mobile-logo i{
      width:30px;height:30px;border-radius:50% 50% 50% 9px;
      background:linear-gradient(135deg,var(--color-primary),#A88BFF);
      transform:rotate(-24deg);
      display:inline-block;
    }
    .menu-button{
      width:44px;height:44px;border:0;border-radius:14px;
      background:var(--color-primary-soft);
      color:var(--color-primary-deep);
      font-size:24px;
      line-height:1;
      display:flex;
      align-items:center;
      justify-content:center;
      transition:background var(--speed),transform var(--speed);
    }
    .menu-button:hover{background:#E8DEFF;transform:translateY(-1px)}
    .mobile-menu{
      display:none;
      position:fixed;
      left:12px;right:12px;top:76px;
      z-index:70;
      background:rgba(255,255,255,.96);
      border:1px solid var(--color-line);
      border-radius:22px;
      padding:12px;
      box-shadow:var(--shadow-hover);
    }
    .mobile-menu.is-open{display:block}
    .mobile-menu a{
      display:flex;
      align-items:center;
      justify-content:space-between;
      min-height:48px;
      padding:0 14px;
      border-radius:15px;
      color:var(--color-text);
      font-weight:700;
    }
    .mobile-menu a.active,.mobile-menu a:hover{background:var(--color-primary-soft);color:var(--color-primary-deep)}
    .main-content{
      margin-left:var(--sidebar);
      min-height:100vh;
    }
    .page-container{
      max-width:var(--container);
      margin:0 auto;
      padding:0 34px;
    }
    .section{
      padding:84px 0;
      position:relative;
    }
    .section.compact{padding:58px 0}
    .section-head{
      max-width:760px;
      margin-bottom:34px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:rgba(124,92,255,.10);
      color:var(--color-primary-deep);
      font-size:13px;
      font-weight:800;
      margin-bottom:16px;
    }
    .eyebrow:before{
      content:"";
      width:8px;height:8px;border-radius:50%;
      background:var(--color-apricot);
      box-shadow:0 0 0 5px rgba(255,184,107,.18);
    }
    h1,h2,h3,p{margin-top:0}
    h1{
      font-size:clamp(34px,4.7vw,56px);
      line-height:1.16;
      letter-spacing:-.04em;
      color:var(--color-ink);
      font-weight:850;
      margin-bottom:22px;
    }
    h2{
      font-size:clamp(26px,3vw,36px);
      line-height:1.28;
      letter-spacing:-.03em;
      color:var(--color-ink);
      font-weight:820;
      margin-bottom:14px;
    }
    h3{
      font-size:20px;
      line-height:1.35;
      color:var(--color-ink);
      font-weight:780;
      margin-bottom:9px;
    }
    .lead{
      font-size:17px;
      line-height:1.9;
      color:#5A5369;
      margin-bottom:0;
    }
    .hero{
      padding:34px 0 78px;
    }
    .hero-panel{
      position:relative;
      overflow:hidden;
      border-radius:var(--radius-xl);
      padding:56px;
      background:
        radial-gradient(circle at 80% 14%, rgba(255,184,107,.26), transparent 24%),
        radial-gradient(circle at 20% 80%, rgba(216,204,255,.72), transparent 30%),
        linear-gradient(135deg,rgba(255,255,255,.94),rgba(247,243,255,.90));
      border:1px solid rgba(124,92,255,.16);
      box-shadow:var(--shadow-soft);
    }
    .hero-panel:before,.hero-panel:after{
      content:"";
      position:absolute;
      border-radius:999px;
      pointer-events:none;
    }
    .hero-panel:before{
      width:280px;height:280px;
      right:-80px;top:-90px;
      background:rgba(124,92,255,.10);
    }
    .hero-panel:after{
      width:180px;height:12px;
      right:70px;bottom:62px;
      background:linear-gradient(90deg,var(--color-primary),rgba(124,92,255,.08));
      box-shadow:0 20px 0 rgba(124,92,255,.08),0 40px 0 rgba(255,184,107,.18);
    }
    .hero-copy{position:relative;z-index:2}
    .hero-points{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin:26px 0 30px;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:7px 11px;
      border-radius:999px;
      background:#fff;
      border:1px solid rgba(124,92,255,.14);
      color:#665D78;
      font-size:13px;
      font-weight:750;
      box-shadow:0 8px 18px rgba(71,54,124,.06);
      white-space:nowrap;
    }
    .badge.warm{background:rgba(255,184,107,.13);border-color:rgba(255,184,107,.24);color:#7A5525}
    .button-row{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      align-items:center;
    }
    .btn{
      min-height:48px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      padding:13px 20px;
      border-radius:999px;
      border:1px solid transparent;
      font-weight:800;
      font-size:15px;
      line-height:1;
      transition:transform var(--speed),box-shadow var(--speed),background var(--speed),color var(--speed),border-color var(--speed);
    }
    .btn.primary{
      color:#fff;
      background:linear-gradient(135deg,var(--color-primary),var(--color-primary-deep));
      box-shadow:0 14px 28px rgba(124,92,255,.26);
    }
    .btn.primary:hover{
      color:#fff;
      transform:translateY(-2px);
      box-shadow:0 18px 36px rgba(124,92,255,.34);
      background:linear-gradient(135deg,#8466FF,#5F3ED5);
    }
    .btn.secondary{
      color:var(--color-primary-deep);
      background:#fff;
      border-color:rgba(124,92,255,.22);
      box-shadow:0 10px 24px rgba(71,54,124,.08);
    }
    .btn.secondary:hover{
      background:var(--color-primary-soft);
      transform:translateY(-2px);
      color:var(--color-primary-deep);
    }
    .btn.ghost{
      background:rgba(255,255,255,.72);
      color:var(--color-text);
      border-color:rgba(124,92,255,.14);
    }
    .mock-device{
      position:relative;
      z-index:2;
      border-radius:34px;
      padding:18px;
      background:linear-gradient(145deg,#2D2938,#4B3D70);
      box-shadow:0 26px 60px rgba(45,41,56,.24);
      transform:rotate(1.3deg);
    }
    .mock-screen{
      min-height:420px;
      border-radius:24px;
      overflow:hidden;
      background:
        linear-gradient(180deg,#fff 0%,#FBFAFF 100%);
      border:1px solid rgba(255,255,255,.55);
      padding:18px;
    }
    .screen-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      margin-bottom:18px;
    }
    .screen-dots{display:flex;gap:6px}
    .screen-dots i{width:8px;height:8px;border-radius:50%;background:#D8CCFF;display:block}
    .screen-pill{
      padding:5px 10px;
      border-radius:999px;
      background:var(--color-primary-soft);
      color:var(--color-primary-deep);
      font-size:12px;
      font-weight:800;
    }
    .progress-card{
      border-radius:22px;
      background:linear-gradient(135deg,var(--color-primary-soft),#fff);
      border:1px solid rgba(124,92,255,.14);
      padding:18px;
      margin-bottom:14px;
    }
    .line{
      height:10px;border-radius:999px;background:#ECE7F8;margin:12px 0;overflow:hidden;
    }
    .line span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--color-primary),var(--color-apricot))}
    .mini-list{display:grid;gap:10px}
    .mini-item{
      display:flex;align-items:center;justify-content:space-between;
      padding:12px;border-radius:16px;background:#fff;border:1px solid rgba(124,92,255,.10);
      box-shadow:0 8px 18px rgba(71,54,124,.05);
    }
    .mini-item strong{font-size:14px;color:var(--color-ink)}
    .mini-item small{color:var(--color-muted);font-weight:700}
    .value-wrap{
      display:grid;
      grid-template-columns:.9fr 1.1fr;
      gap:26px;
      align-items:stretch;
    }
    .feature-large,.feature-card,.system-card,.testimonial,.download-panel,.faq-wrap,.topic-strip{
      background:var(--color-card);
      border:1px solid var(--color-line);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-soft);
    }
    .feature-large{
      padding:32px;
      min-height:100%;
      position:relative;
      overflow:hidden;
    }
    .feature-large:after{
      content:"";
      position:absolute;
      width:170px;height:170px;
      right:-62px;bottom:-58px;
      background:radial-gradient(circle,rgba(124,92,255,.18),transparent 70%);
      border-radius:50%;
    }
    .feature-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:18px;
    }
    .feature-card{
      padding:24px;
      transition:transform var(--speed),box-shadow var(--speed),border-color var(--speed);
    }
    .feature-card:hover,.topic-card:hover,.testimonial:hover{
      transform:translateY(-3px);
      box-shadow:var(--shadow-hover);
      border-color:rgba(124,92,255,.35);
    }
    .icon-box{
      width:42px;height:42px;border-radius:16px;
      display:flex;align-items:center;justify-content:center;
      background:linear-gradient(135deg,var(--color-primary-soft),#fff);
      color:var(--color-primary-deep);
      border:1px solid rgba(124,92,255,.14);
      font-size:21px;
      margin-bottom:16px;
      font-weight:900;
    }
    .soft-list{
      list-style:none;
      padding:0;
      margin:22px 0 0;
      display:grid;
      gap:12px;
    }
    .soft-list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:#5D566B;
    }
    .soft-list li:before{
      content:"";
      width:8px;height:8px;border-radius:50%;
      background:var(--color-primary);
      margin-top:11px;
      flex:0 0 auto;
      box-shadow:0 0 0 5px rgba(124,92,255,.10);
    }
    .carousel-shell{
      border-radius:var(--radius-xl);
      background:linear-gradient(135deg,rgba(45,41,56,.96),rgba(80,62,122,.95));
      padding:28px;
      box-shadow:0 24px 60px rgba(45,41,56,.20);
      overflow:hidden;
      position:relative;
    }
    .carousel-track{
      display:flex;
      transition:transform .38s ease;
    }
    .slide{
      min-width:100%;
      padding:6px;
    }
    .slide-inner{
      display:grid;
      grid-template-columns:1fr .78fr;
      gap:28px;
      align-items:center;
    }
    .ui-shot{
      min-height:330px;
      border-radius:28px;
      background:
        linear-gradient(180deg,#fff,#F7F3FF);
      padding:22px;
      position:relative;
      overflow:hidden;
    }
    .ui-shot:before{
      content:"";
      position:absolute;
      inset:auto 24px 24px 24px;
      height:9px;
      border-radius:999px;
      background:linear-gradient(90deg,var(--color-primary) 0 58%,rgba(124,92,255,.12) 58%);
    }
    .shot-row{
      border-radius:18px;
      background:#fff;
      border:1px solid rgba(124,92,255,.12);
      padding:14px;
      margin-bottom:12px;
      display:flex;
      align-items:center;
      gap:12px;
      box-shadow:0 8px 18px rgba(71,54,124,.05);
    }
    .shot-icon{
      width:42px;height:42px;border-radius:14px;
      background:linear-gradient(135deg,var(--color-primary),#A88BFF);
      color:#fff;
      display:flex;align-items:center;justify-content:center;
      font-weight:900;
    }
    .slide-copy{color:#EFEAFF}
    .slide-copy h3{color:#fff;font-size:25px}
    .slide-copy p{color:#DCD3F4}
    .carousel-controls{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      margin-top:20px;
    }
    .carousel-btn{
      width:44px;height:44px;border-radius:16px;
      border:1px solid rgba(255,255,255,.20);
      background:rgba(255,255,255,.10);
      color:#fff;
      font-size:22px;
      display:inline-flex;align-items:center;justify-content:center;
      transition:background var(--speed),transform var(--speed);
    }
    .carousel-btn:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
    .dots{display:flex;gap:8px;align-items:center}
    .dot{
      width:9px;height:9px;border:0;border-radius:999px;
      background:rgba(255,255,255,.36);
      padding:0;
      transition:width var(--speed),background var(--speed);
    }
    .dot.active{width:28px;background:var(--color-apricot)}
    .system-layout{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:22px;
    }
    .system-card{padding:26px}
    .spec-list{display:grid;gap:13px;margin:0;padding:0;list-style:none}
    .spec-list li{
      display:grid;
      grid-template-columns:112px 1fr;
      gap:14px;
      padding:13px 0;
      border-bottom:1px dashed rgba(124,92,255,.18);
    }
    .spec-list li:last-child{border-bottom:0}
    .spec-list b{color:var(--color-ink)}
    .spec-list span{color:#665F72}
    .platform-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .testimonials{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:18px;
      align-items:start;
    }
    .testimonial{
      padding:22px;
      transition:transform var(--speed),box-shadow var(--speed),border-color var(--speed);
    }
    .testimonial:nth-child(2),.testimonial:nth-child(5){margin-top:28px}
    .avatar{
      width:42px;height:42px;border-radius:16px;
      display:flex;align-items:center;justify-content:center;
      background:var(--color-primary-soft);
      color:var(--color-primary-deep);
      font-weight:900;
      margin-bottom:14px;
    }
    .testimonial p{font-size:15px;color:#5F586C;margin-bottom:12px}
    .testimonial small{color:var(--color-muted);font-weight:700}
    .download-panel{
      padding:36px;
      position:relative;
      overflow:hidden;
      background:
        radial-gradient(circle at 90% 18%, rgba(255,184,107,.25), transparent 24%),
        linear-gradient(135deg,#fff,var(--color-primary-soft));
    }
    .download-panel:after{
      content:"";
      position:absolute;
      right:26px;bottom:26px;
      width:170px;height:10px;border-radius:999px;
      background:linear-gradient(90deg,var(--color-primary),rgba(124,92,255,.08));
      box-shadow:0 22px 0 rgba(124,92,255,.10),0 44px 0 rgba(255,184,107,.18);
    }
    .download-grid{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:28px;
      align-items:center;
      position:relative;
      z-index:2;
    }
    .download-buttons{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:12px;
    }
    .download-card{
      min-height:74px;
      border-radius:20px;
      padding:14px 16px;
      background:rgba(255,255,255,.82);
      border:1px solid rgba(124,92,255,.16);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      box-shadow:0 10px 24px rgba(71,54,124,.07);
    }
    .download-card:hover{
      transform:translateY(-2px);
      box-shadow:var(--shadow-hover);
      border-color:rgba(124,92,255,.34);
    }
    .download-card strong{display:block;color:var(--color-ink);line-height:1.3}
    .download-card small{display:block;color:var(--color-muted);font-weight:700}
    .safe-note{
      margin-top:20px;
      padding:14px 16px;
      border-radius:18px;
      background:rgba(255,255,255,.72);
      border:1px dashed rgba(124,92,255,.24);
      color:#635C71;
      font-size:14px;
    }
    .accordion.faq-accordion{
      background:transparent;
      margin:0;
    }
    .faq-accordion .accordion-item{
      margin-bottom:14px;
      border:1px solid var(--color-line);
      border-radius:20px;
      background:rgba(255,255,255,.88);
      overflow:hidden;
      box-shadow:0 10px 26px rgba(71,54,124,.07);
    }
    .faq-accordion .accordion-title{
      border:0;
      padding:19px 22px;
      color:var(--color-ink);
      font-weight:800;
      font-size:16px;
      background:transparent;
    }
    .faq-accordion .accordion-title:before{
      content:"+";
      margin-top:-.7rem;
      color:var(--color-primary);
      font-size:24px;
      transition:transform var(--speed);
    }
    .faq-accordion .is-active>.accordion-title{
      color:var(--color-primary-deep);
      background:linear-gradient(90deg,rgba(124,92,255,.08),transparent);
    }
    .faq-accordion .is-active>.accordion-title:before{
      content:"—";
      transform:rotate(180deg);
    }
    .faq-accordion .accordion-content{
      border:0;
      padding:0 22px 20px;
      color:#655E72;
      background:transparent;
      line-height:1.85;
    }
    .topic-strip{
      padding:24px;
      display:grid;
      grid-template-columns:1fr auto;
      gap:18px;
      align-items:center;
      background:linear-gradient(135deg,rgba(255,255,255,.92),rgba(242,234,254,.82));
    }
    .topic-card{
      border-radius:24px;
      background:#fff;
      border:1px solid var(--color-line);
      padding:24px;
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:18px;
      align-items:center;
      box-shadow:var(--shadow-soft);
      transition:transform var(--speed),box-shadow var(--speed),border-color var(--speed);
    }
    .topic-card .arrow{
      color:var(--color-primary);
      font-size:24px;
      transition:transform var(--speed);
    }
    .topic-card:hover .arrow{transform:translateX(4px)}
    .site-footer{
      margin-left:var(--sidebar);
      background:linear-gradient(135deg,#2D2938,#413658);
      color:#EDE8FA;
      padding:48px 0 28px;
      position:relative;
      overflow:hidden;
    }
    .site-footer:before{
      content:"";
      position:absolute;
      width:260px;height:260px;border-radius:50%;
      right:-80px;top:-90px;
      background:rgba(124,92,255,.18);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr .8fr;
      gap:34px;
      position:relative;
      z-index:1;
    }
    .footer-brand{
      font-size:20px;
      font-weight:850;
      margin-bottom:10px;
    }
    .footer-grid p,.footer-grid a,.copyright{
      color:#CFC7E1;
      font-size:14px;
    }
    .footer-links{display:grid;gap:8px}
    .footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
    .footer-title{
      color:#fff;
      font-weight:800;
      margin-bottom:12px;
    }
    .copyright{
      margin-top:30px;
      padding-top:18px;
      border-top:1px solid rgba(255,255,255,.10);
      position:relative;
      z-index:1;
    }
    @media (max-width:1024px){
      :root{--sidebar:0px}
      .desktop-sidebar{display:none}
      .mobile-header{display:flex}
      .main-content,.site-footer{margin-left:0}
      .hero{padding-top:28px}
      .hero-panel{padding:38px}
      .slide-inner,.download-grid,.value-wrap{grid-template-columns:1fr}
      .mock-device{transform:none}
      .testimonials{grid-template-columns:repeat(2,minmax(0,1fr))}
      .testimonial:nth-child(2),.testimonial:nth-child(5){margin-top:0}
    }
    @media (max-width:768px){
      .page-container{padding:0 18px}
      .section{padding:58px 0}
      .section.compact{padding:44px 0}
      .hero-panel{padding:28px 22px;border-radius:28px}
      .lead{font-size:16px}
      .button-row{align-items:stretch}
      .btn{width:100%;min-height:48px}
      .feature-grid,.system-layout,.download-buttons,.testimonials,.footer-grid{grid-template-columns:1fr}
      .mock-screen{min-height:340px}
      .carousel-shell{padding:18px;border-radius:28px}
      .slide-inner{gap:18px}
      .ui-shot{min-height:280px;padding:16px}
      .carousel-controls{margin-top:14px}
      .spec-list li{grid-template-columns:92px 1fr}
      .topic-strip,.topic-card{grid-template-columns:1fr}
      .topic-card .arrow{display:none}
      .download-panel{padding:26px 20px}
      .site-footer{padding-top:38px}
    }
    @media (max-width:520px){
      .mobile-logo span{font-size:14px;max-width:230px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
      h1{font-size:32px}
      h2{font-size:25px}
      h3{font-size:19px}
      .hero-points{overflow-x:auto;flex-wrap:nowrap;padding-bottom:6px}
      .badge{flex:0 0 auto}
      .download-card{align-items:flex-start;flex-direction:column}
      .screen-top{align-items:flex-start;gap:12px;flex-direction:column}
      .spec-list li{grid-template-columns:1fr;gap:3px}
    }

/* roulang page: category1 */
:root{
      --color-primary:#7C5CFF;
      --color-primary-2:#8E6CF2;
      --color-primary-dark:#5A3FD6;
      --color-soft:#F2EAFE;
      --color-soft-2:#F7F3FF;
      --color-lilac:#D8CCFF;
      --color-warm:#FFB86B;
      --color-ink:#2D2938;
      --color-text:#454052;
      --color-muted:#756F86;
      --color-line:rgba(124,92,255,.14);
      --color-card:rgba(255,255,255,.86);
      --shadow-sm:0 10px 28px rgba(71,54,124,.08);
      --shadow-md:0 18px 48px rgba(71,54,124,.12);
      --shadow-lg:0 26px 70px rgba(71,54,124,.16);
      --radius-sm:14px;
      --radius-md:22px;
      --radius-lg:32px;
      --radius-pill:999px;
      --nav-width:104px;
      --container:1180px;
      --transition:all .24s ease;
      --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-height:100vh;
      font-family:var(--font);
      color:var(--color-text);
      line-height:1.78;
      background:
        radial-gradient(circle at 16% 8%, rgba(216,204,255,.52), transparent 30%),
        radial-gradient(circle at 86% 12%, rgba(255,184,107,.16), transparent 28%),
        linear-gradient(180deg,#FBFAFF 0%,#F7F3FF 48%,#FBFAFF 100%);
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background-image:
        radial-gradient(circle, rgba(124,92,255,.10) 1px, transparent 1.5px),
        linear-gradient(135deg, rgba(255,255,255,.38), transparent);
      background-size:28px 28px,100% 100%;
      opacity:.45;
      z-index:-2;
    }
    a{
      color:inherit;
      text-decoration:none;
      transition:var(--transition);
    }
    img{max-width:100%;height:auto;display:block}
    button,input{font-family:inherit}
    button{cursor:pointer}
    section{position:relative}
    :focus-visible{
      outline:3px solid rgba(124,92,255,.34);
      outline-offset:3px;
      border-radius:12px;
    }

    .page-shell{
      min-height:100vh;
      padding-left:var(--nav-width);
    }
    .page-container{
      width:min(calc(100% - 40px),var(--container));
      margin:0 auto;
    }
    .section{
      padding:82px 0;
    }
    .section.tight{
      padding:54px 0;
    }
    .section-head{
      max-width:760px;
      margin-bottom:30px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:var(--radius-pill);
      color:var(--color-primary-dark);
      background:rgba(242,234,254,.86);
      border:1px solid var(--color-line);
      font-size:13px;
      font-weight:700;
      line-height:1.2;
    }
    .eyebrow::before{
      content:"";
      width:7px;
      height:7px;
      border-radius:50%;
      background:var(--color-warm);
      box-shadow:0 0 0 5px rgba(255,184,107,.16);
    }
    h1,h2,h3,p{margin-top:0}
    h1{
      margin:18px 0 18px;
      color:var(--color-ink);
      font-size:46px;
      line-height:1.18;
      font-weight:800;
      letter-spacing:-.8px;
    }
    h2{
      color:var(--color-ink);
      font-size:32px;
      line-height:1.28;
      font-weight:800;
      letter-spacing:-.35px;
      margin-bottom:12px;
    }
    h3{
      color:var(--color-ink);
      font-size:20px;
      line-height:1.35;
      font-weight:750;
      margin-bottom:8px;
    }
    p{
      font-size:16px;
      color:var(--color-muted);
      margin-bottom:0;
    }

    .side-rail{
      position:fixed;
      left:0;
      top:0;
      bottom:0;
      z-index:40;
      width:var(--nav-width);
      padding:18px 14px;
      background:rgba(255,255,255,.78);
      backdrop-filter:blur(18px);
      border-right:1px solid var(--color-line);
      box-shadow:10px 0 32px rgba(71,54,124,.05);
      display:flex;
      flex-direction:column;
      align-items:center;
      justify-content:space-between;
    }
    .brand-mark{
      width:68px;
      min-height:68px;
      border-radius:24px;
      display:flex;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:2px;
      color:#fff;
      background:
        radial-gradient(circle at 28% 20%, rgba(255,255,255,.48), transparent 28%),
        linear-gradient(145deg,var(--color-primary),var(--color-primary-2));
      box-shadow:0 16px 34px rgba(124,92,255,.25);
      font-weight:800;
      line-height:1.05;
      text-align:center;
    }
    .brand-mark .mark-main{font-size:20px}
    .brand-mark .mark-sub{font-size:11px;opacity:.86}
    .side-nav{
      display:flex;
      flex-direction:column;
      gap:12px;
      width:100%;
      align-items:center;
    }
    .side-link{
      width:76px;
      min-height:70px;
      border-radius:22px;
      display:flex;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:5px;
      color:#6D6680;
      font-size:12px;
      font-weight:700;
      border:1px solid transparent;
      position:relative;
    }
    .side-link .nav-ico{
      font-size:20px;
      line-height:1;
      color:#7B748C;
      transition:var(--transition);
    }
    .side-link:hover{
      color:var(--color-primary-dark);
      background:rgba(242,234,254,.72);
      border-color:var(--color-line);
      transform:translateX(2px);
    }
    .side-link:hover .nav-ico{
      color:var(--color-primary);
      transform:translateY(-1px);
    }
    .side-link.active{
      color:var(--color-primary-dark);
      background:linear-gradient(180deg,rgba(242,234,254,.98),rgba(255,255,255,.82));
      border-color:rgba(124,92,255,.22);
      box-shadow:var(--shadow-sm);
    }
    .side-link.active::before{
      content:"";
      position:absolute;
      left:-14px;
      top:18px;
      width:4px;
      height:34px;
      border-radius:var(--radius-pill);
      background:linear-gradient(180deg,var(--color-primary),var(--color-warm));
    }
    .rail-status{
      writing-mode:vertical-rl;
      color:#9A93AA;
      font-size:12px;
      letter-spacing:2px;
    }

    .mobile-topbar{
      display:none;
      position:sticky;
      top:0;
      z-index:50;
      height:66px;
      padding:0 16px;
      align-items:center;
      justify-content:space-between;
      background:rgba(255,255,255,.86);
      backdrop-filter:blur(18px);
      border-bottom:1px solid var(--color-line);
    }
    .mobile-brand{
      display:flex;
      align-items:center;
      gap:10px;
      font-weight:800;
      color:var(--color-ink);
    }
    .mobile-brand-badge{
      width:38px;
      height:38px;
      border-radius:14px;
      display:grid;
      place-items:center;
      color:#fff;
      background:linear-gradient(135deg,var(--color-primary),var(--color-primary-2));
      box-shadow:0 10px 22px rgba(124,92,255,.22);
    }
    .menu-toggle{
      width:44px;
      height:44px;
      border:0;
      border-radius:15px;
      background:rgba(242,234,254,.9);
      color:var(--color-primary-dark);
      font-size:22px;
      transition:var(--transition);
    }
    .menu-toggle:hover{background:#fff;box-shadow:var(--shadow-sm)}
    .mobile-menu{
      display:none;
      position:fixed;
      z-index:49;
      left:12px;
      right:12px;
      top:76px;
      padding:12px;
      border:1px solid var(--color-line);
      border-radius:24px;
      background:rgba(255,255,255,.96);
      box-shadow:var(--shadow-md);
    }
    .mobile-menu.is-open{display:block}
    .mobile-menu a{
      display:flex;
      align-items:center;
      gap:10px;
      min-height:48px;
      padding:10px 14px;
      border-radius:16px;
      color:var(--color-text);
      font-weight:750;
    }
    .mobile-menu a:hover,
    .mobile-menu a.active{
      color:var(--color-primary-dark);
      background:rgba(242,234,254,.9);
    }

    .topic-hero{
      padding:42px 0 48px;
    }
    .breadcrumb{
      display:flex;
      align-items:center;
      gap:8px;
      flex-wrap:wrap;
      margin-bottom:22px;
      color:#90899E;
      font-size:13px;
      font-weight:650;
    }
    .breadcrumb a:hover{color:var(--color-primary-dark)}
    .hero-panel{
      position:relative;
      overflow:hidden;
      padding:38px;
      border-radius:var(--radius-lg);
      border:1px solid rgba(124,92,255,.16);
      background:
        radial-gradient(circle at 92% 15%, rgba(255,184,107,.20), transparent 26%),
        radial-gradient(circle at 72% 75%, rgba(216,204,255,.42), transparent 32%),
        linear-gradient(135deg,rgba(255,255,255,.94),rgba(247,243,255,.9));
      box-shadow:var(--shadow-md);
    }
    .hero-panel::after{
      content:"";
      position:absolute;
      right:-70px;
      bottom:-80px;
      width:250px;
      height:250px;
      border-radius:42% 58% 48% 52%;
      border:1px solid rgba(124,92,255,.14);
      background:rgba(255,255,255,.28);
      transform:rotate(-18deg);
    }
    .hero-copy{
      position:relative;
      z-index:1;
      max-width:720px;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:26px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:46px;
      padding:12px 20px;
      border-radius:var(--radius-pill);
      border:1px solid transparent;
      font-size:15px;
      font-weight:800;
      line-height:1;
      transition:var(--transition);
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg,var(--color-primary),var(--color-primary-2));
      box-shadow:0 14px 28px rgba(124,92,255,.24);
    }
    .btn-primary:hover{
      color:#fff;
      transform:translateY(-2px);
      box-shadow:0 18px 36px rgba(124,92,255,.30);
      background:linear-gradient(135deg,var(--color-primary-dark),var(--color-primary));
    }
    .btn-secondary{
      color:var(--color-primary-dark);
      background:rgba(255,255,255,.82);
      border-color:rgba(124,92,255,.22);
    }
    .btn-secondary:hover{
      color:var(--color-primary-dark);
      background:rgba(242,234,254,.95);
      transform:translateY(-2px);
      box-shadow:var(--shadow-sm);
    }
    .topic-stats{
      position:relative;
      z-index:1;
      margin-top:30px;
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:12px;
    }
    .stat-tile{
      padding:15px;
      border-radius:20px;
      background:rgba(255,255,255,.68);
      border:1px solid rgba(124,92,255,.12);
    }
    .stat-tile strong{
      display:block;
      color:var(--color-ink);
      font-size:18px;
      margin-bottom:2px;
    }
    .stat-tile span{
      color:var(--color-muted);
      font-size:13px;
      font-weight:650;
    }

    .filter-card{
      padding:18px;
      border-radius:26px;
      background:rgba(255,255,255,.76);
      border:1px solid var(--color-line);
      box-shadow:var(--shadow-sm);
    }
    .filter-bar{
      display:flex;
      gap:10px;
      overflow-x:auto;
      padding:4px 2px 8px;
      scrollbar-width:none;
    }
    .filter-bar::-webkit-scrollbar{display:none}
    .filter-chip{
      flex:0 0 auto;
      display:inline-flex;
      align-items:center;
      gap:7px;
      min-height:40px;
      padding:9px 14px;
      border-radius:var(--radius-pill);
      border:1px solid rgba(124,92,255,.16);
      background:#fff;
      color:#5F5870;
      font-size:14px;
      font-weight:750;
      transition:var(--transition);
    }
    .filter-chip:hover{
      color:var(--color-primary-dark);
      border-color:rgba(124,92,255,.36);
      transform:translateY(-1px);
      box-shadow:var(--shadow-sm);
    }
    .filter-chip.active{
      color:#fff;
      background:linear-gradient(135deg,var(--color-primary),var(--color-primary-2));
      border-color:transparent;
      box-shadow:0 12px 24px rgba(124,92,255,.22);
    }

    .feature-strip{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:20px 22px;
      border-radius:26px;
      border:1px solid rgba(124,92,255,.14);
      background:
        linear-gradient(90deg,rgba(242,234,254,.96),rgba(255,255,255,.82)),
        radial-gradient(circle at 10% 20%,rgba(255,184,107,.16),transparent 28%);
      box-shadow:var(--shadow-sm);
      margin-top:24px;
    }
    .strip-tags{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:8px;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      padding:6px 10px;
      border-radius:var(--radius-pill);
      color:var(--color-primary-dark);
      background:rgba(242,234,254,.9);
      font-size:12px;
      font-weight:800;
      line-height:1.2;
    }
    .badge.warm{
      color:#875A21;
      background:rgba(255,184,107,.22);
    }

    .topic-layout{
      display:grid;
      grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);
      gap:22px;
      align-items:stretch;
    }
    .big-topic-card,
    .compact-card,
    .timeline-card,
    .tool-card,
    .faq-card{
      border:1px solid var(--color-line);
      background:var(--color-card);
      border-radius:var(--radius-md);
      box-shadow:var(--shadow-sm);
      transition:var(--transition);
      overflow:hidden;
    }
    .big-topic-card:hover,
    .compact-card:hover,
    .timeline-card:hover,
    .tool-card:hover{
      transform:translateY(-3px);
      border-color:rgba(124,92,255,.34);
      box-shadow:var(--shadow-md);
    }
    .big-topic-card{
      min-height:100%;
      display:flex;
      flex-direction:column;
    }
    .topic-visual{
      height:250px;
      position:relative;
      overflow:hidden;
      background:
        radial-gradient(circle at 24% 22%, rgba(255,255,255,.62), transparent 20%),
        radial-gradient(circle at 80% 16%, rgba(255,184,107,.24), transparent 24%),
        linear-gradient(135deg,#7C5CFF,#D8CCFF 64%,#F2EAFE);
    }
    .topic-visual::before{
      content:"";
      position:absolute;
      left:32px;
      right:32px;
      bottom:34px;
      height:92px;
      border-radius:24px;
      background:rgba(255,255,255,.78);
      box-shadow:0 18px 42px rgba(71,54,124,.16);
    }
    .topic-visual::after{
      content:"▶  阅读清单  ·  观影进度  ·  正版记录";
      position:absolute;
      left:52px;
      right:52px;
      bottom:64px;
      color:var(--color-primary-dark);
      font-weight:850;
      font-size:15px;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .big-topic-body{
      padding:28px;
    }
    .meta-row{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin:14px 0 20px;
    }
    .read-link{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--color-primary-dark);
      font-weight:850;
    }
    .read-link span{
      transition:var(--transition);
    }
    .read-link:hover span{
      transform:translateX(4px);
    }

    .compact-list{
      display:grid;
      gap:14px;
    }
    .compact-card{
      display:grid;
      grid-template-columns:82px minmax(0,1fr);
      gap:16px;
      padding:16px;
    }
    .thumb{
      width:82px;
      min-height:82px;
      border-radius:20px;
      display:grid;
      place-items:center;
      color:#fff;
      font-size:26px;
      font-weight:900;
      background:
        radial-gradient(circle at 26% 20%, rgba(255,255,255,.48), transparent 28%),
        linear-gradient(145deg,var(--color-primary-2),var(--color-lilac));
    }
    .compact-card:nth-child(2) .thumb{
      background:linear-gradient(145deg,#FFB86B,#D8CCFF);
    }
    .compact-card:nth-child(3) .thumb{
      background:linear-gradient(145deg,#8066D8,#F2EAFE);
    }
    .compact-card p{
      font-size:14px;
      line-height:1.65;
    }
    .card-foot{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-top:10px;
      color:#90899E;
      font-size:12px;
      font-weight:700;
    }

    .timeline{
      position:relative;
      display:grid;
      gap:14px;
    }
    .timeline::before{
      content:"";
      position:absolute;
      left:18px;
      top:18px;
      bottom:18px;
      width:2px;
      background:linear-gradient(180deg,rgba(124,92,255,.34),rgba(255,184,107,.18));
      border-radius:var(--radius-pill);
    }
    .timeline-card{
      position:relative;
      margin-left:44px;
      padding:20px 22px;
    }
    .timeline-card::before{
      content:"";
      position:absolute;
      left:-34px;
      top:24px;
      width:14px;
      height:14px;
      border-radius:50%;
      background:#fff;
      border:4px solid var(--color-primary);
      box-shadow:0 0 0 5px rgba(124,92,255,.12);
    }

    .tool-panel{
      padding:30px;
      border-radius:var(--radius-lg);
      overflow:hidden;
      border:1px solid rgba(124,92,255,.16);
      background:
        radial-gradient(circle at 90% 20%, rgba(255,184,107,.18), transparent 24%),
        linear-gradient(135deg,rgba(242,234,254,.98),rgba(255,255,255,.88));
      box-shadow:var(--shadow-md);
    }
    .tool-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:18px;
      margin-top:24px;
    }
    .tool-card{
      padding:22px;
      background:rgba(255,255,255,.78);
    }
    .tool-icon{
      width:46px;
      height:46px;
      display:grid;
      place-items:center;
      border-radius:16px;
      margin-bottom:14px;
      color:#fff;
      font-size:21px;
      background:linear-gradient(135deg,var(--color-primary),var(--color-primary-2));
      box-shadow:0 12px 22px rgba(124,92,255,.20);
    }

    .faq-wrap{
      max-width:920px;
      margin:0 auto;
    }
    .accordion{
      background:transparent;
    }
    .accordion-item{
      margin-bottom:14px;
      border-radius:22px;
      overflow:hidden;
      background:rgba(255,255,255,.82);
      border:1px solid var(--color-line);
      box-shadow:var(--shadow-sm);
    }
    .accordion-title{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:20px 22px;
      border:0;
      color:var(--color-ink);
      font-size:17px;
      font-weight:850;
      line-height:1.45;
    }
    .accordion-title:hover,
    .accordion-title:focus{
      color:var(--color-primary-dark);
      background:rgba(242,234,254,.6);
    }
    .accordion-title::before{
      right:22px;
      color:var(--color-primary);
      font-size:22px;
      margin-top:-10px;
    }
    .accordion-content{
      padding:0 22px 20px;
      border:0;
      color:var(--color-muted);
      background:transparent;
      font-size:15px;
      line-height:1.8;
    }
    .accordion-content p{font-size:15px}

    .site-footer{
      margin-top:20px;
      padding:48px 0 24px;
      color:rgba(255,255,255,.78);
      background:
        radial-gradient(circle at 15% 0%, rgba(124,92,255,.30), transparent 28%),
        linear-gradient(135deg,#2D2938,#3A334B);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.35fr .75fr 1fr;
      gap:34px;
      padding-bottom:30px;
      border-bottom:1px solid rgba(255,255,255,.12);
    }
    .footer-brand{
      color:#fff;
      font-size:20px;
      font-weight:850;
      margin-bottom:10px;
    }
    .footer-title{
      color:#fff;
      font-size:15px;
      font-weight:850;
      margin-bottom:12px;
    }
    .site-footer p{
      color:rgba(255,255,255,.70);
      font-size:14px;
      line-height:1.8;
    }
    .footer-links{
      display:grid;
      gap:9px;
    }
    .footer-links a{
      color:rgba(255,255,255,.72);
      font-size:14px;
      font-weight:650;
      width:max-content;
    }
    .footer-links a:hover{
      color:#fff;
      text-decoration:underline;
      text-decoration-color:rgba(255,184,107,.7);
      text-underline-offset:4px;
    }
    .copyright{
      padding-top:18px;
      color:rgba(255,255,255,.55);
      font-size:12px;
    }

    @media (max-width:1024px){
      .page-shell{padding-left:0}
      .side-rail{display:none}
      .mobile-topbar{display:flex}
      .topic-hero{padding-top:26px}
      h1{font-size:38px}
      h2{font-size:29px}
      .topic-layout{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
    }

    @media (max-width:768px){
      .page-container{width:min(calc(100% - 28px),var(--container))}
      .section{padding:58px 0}
      .section.tight{padding:42px 0}
      .hero-panel{padding:26px;border-radius:26px}
      h1{font-size:32px;letter-spacing:-.3px}
      h2{font-size:25px}
      h3{font-size:18px}
      p{font-size:15px}
      .hero-actions{flex-direction:column}
      .btn{width:100%;min-height:48px}
      .topic-stats{grid-template-columns:1fr 1fr}
      .feature-strip{align-items:flex-start;flex-direction:column}
      .tool-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
    }

    @media (max-width:520px){
      .mobile-brand span:last-child{
        max-width:210px;
        overflow:hidden;
        text-overflow:ellipsis;
        white-space:nowrap;
      }
      .topic-stats{grid-template-columns:1fr}
      .compact-card{grid-template-columns:1fr}
      .thumb{width:100%;min-height:92px}
      .topic-visual{height:210px}
      .topic-visual::before{left:20px;right:20px}
      .topic-visual::after{left:36px;right:36px}
      .timeline-card{margin-left:34px;padding:18px}
      .timeline::before{left:14px}
      .timeline-card::before{left:-27px}
      .filter-card{padding:14px}
    }