/* roulang page: index */
:root{
      --bg:#070b16;
      --bg-2:#0b1223;
      --panel:rgba(17, 28, 51, .68);
      --panel-2:rgba(12, 20, 38, .82);
      --glass:rgba(255,255,255,.075);
      --glass-strong:rgba(255,255,255,.11);
      --text:#f4f7ff;
      --muted:#a9b6ce;
      --muted-2:#7d8ba6;
      --line:rgba(181,211,255,.16);
      --line-strong:rgba(255,184,206,.36);
      --cyan:#69e3ff;
      --cyan-soft:#4bbdd5;
      --peach:#ff9fbd;
      --peach-2:#ffbd9a;
      --violet:#a98cff;
      --green:#7df5c7;
      --warning:#ffd37a;
      --shadow:0 22px 70px rgba(0,0,0,.38);
      --shadow-soft:0 16px 38px rgba(0,0,0,.24);
      --glow:0 0 28px rgba(255,159,189,.26), 0 0 38px rgba(105,227,255,.12);
      --radius-sm:12px;
      --radius:18px;
      --radius-lg:24px;
      --radius-xl:34px;
      --nav-w:286px;
      --speed:.26s;
      --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(--text);
      line-height:1.7;
      background:
        radial-gradient(circle at 18% 12%, rgba(255,159,189,.18), transparent 34%),
        radial-gradient(circle at 78% 5%, rgba(105,227,255,.16), transparent 30%),
        radial-gradient(circle at 88% 72%, rgba(169,140,255,.15), transparent 38%),
        linear-gradient(135deg, #050812 0%, #091121 42%, #090b16 100%);
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.36;
      background-image:
        linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
      background-size:44px 44px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.78), transparent 88%);
      z-index:-2;
    }
    body:after{
      content:"";
      position:fixed;
      width:760px;
      height:220px;
      left:18%;
      top:16%;
      transform:rotate(-18deg);
      background:linear-gradient(90deg, transparent, rgba(255,159,189,.15), rgba(105,227,255,.09), transparent);
      filter:blur(20px);
      pointer-events:none;
      z-index:-1;
    }
    a{color:inherit;text-decoration:none;transition:color var(--speed), border-color var(--speed), background var(--speed), transform var(--speed)}
    a:hover,a:focus{color:var(--text)}
    img{max-width:100%;display:block}
    button,input,textarea{font-family:inherit}
    button{cursor:pointer}
    :focus-visible{outline:2px solid rgba(105,227,255,.82);outline-offset:4px;border-radius:12px}
    ::selection{background:rgba(255,159,189,.28);color:#fff}

    .site-shell{display:flex;min-height:100vh}
    .side-nav{
      position:fixed;
      left:0;top:0;bottom:0;
      width:var(--nav-w);
      padding:24px 18px;
      background:linear-gradient(180deg, rgba(8,13,26,.92), rgba(9,15,30,.72));
      border-right:1px solid var(--line);
      backdrop-filter:blur(22px);
      z-index:50;
      display:flex;
      flex-direction:column;
      box-shadow:18px 0 60px rgba(0,0,0,.26);
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      padding:10px 10px 20px;
      border-bottom:1px solid var(--line);
    }
    .brand-mark{
      width:48px;height:48px;min-width:48px;
      border-radius:18px;
      position:relative;
      background:
        radial-gradient(circle at 35% 28%, #fff 0 5%, transparent 6%),
        linear-gradient(135deg, var(--peach), var(--violet) 55%, var(--cyan));
      box-shadow:var(--glow);
      overflow:hidden;
    }
    .brand-mark:before{
      content:"";
      position:absolute;
      width:24px;height:34px;
      left:12px;top:7px;
      border-radius:60% 60% 52% 52%;
      background:rgba(255,255,255,.16);
      transform:rotate(18deg);
      border:1px solid rgba(255,255,255,.28);
    }
    .brand-mark:after{
      content:"";
      position:absolute;
      inset:8px;
      border:1px solid rgba(255,255,255,.35);
      border-radius:14px;
    }
    .brand-text strong{
      display:block;
      font-size:15px;
      line-height:1.32;
      letter-spacing:.2px;
      font-weight:800;
    }
    .brand-text span{
      display:block;
      color:var(--muted);
      font-size:12px;
      margin-top:4px;
    }
    .nav-section-title{
      margin:22px 10px 9px;
      font-size:12px;
      color:var(--muted-2);
      letter-spacing:.12em;
    }
    .nav-list{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:8px;
    }
    .nav-link{
      display:flex;
      align-items:center;
      gap:11px;
      padding:12px 13px;
      border-radius:16px;
      color:var(--muted);
      border:1px solid transparent;
      position:relative;
    }
    .nav-link i{width:18px;text-align:center;color:var(--cyan-soft)}
    .nav-link:hover{
      color:var(--text);
      background:rgba(255,255,255,.07);
      border-color:rgba(105,227,255,.18);
      transform:translateX(2px);
    }
    .nav-link.active{
      color:var(--text);
      background:linear-gradient(90deg, rgba(255,159,189,.16), rgba(105,227,255,.08));
      border-color:var(--line-strong);
      box-shadow:inset 3px 0 0 var(--peach), 0 0 24px rgba(255,159,189,.1);
    }
    .nav-mini{
      margin-top:auto;
      padding:16px 12px 4px;
      color:var(--muted-2);
      font-size:12px;
      border-top:1px solid var(--line);
    }
    .nav-mini .status{
      display:flex;align-items:center;gap:8px;
      color:#dce8ff;
      margin-bottom:10px;
    }
    .pulse{
      width:8px;height:8px;border-radius:50%;
      background:var(--green);
      box-shadow:0 0 0 7px rgba(125,245,199,.1);
    }

    .mobile-top{
      display:none;
      position:sticky;
      top:0;
      z-index:60;
      padding:12px 14px;
      background:rgba(7,11,22,.88);
      border-bottom:1px solid var(--line);
      backdrop-filter:blur(18px);
    }
    .mobile-bar{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
    }
    .mobile-brand{
      display:flex;align-items:center;gap:10px;min-width:0;
    }
    .mobile-brand .brand-mark{width:40px;height:40px;min-width:40px;border-radius:15px}
    .mobile-brand strong{
      font-size:13px;
      line-height:1.25;
      font-weight:800;
      display:block;
    }
    .menu-toggle{
      width:44px;height:44px;
      border:1px solid var(--line);
      border-radius:15px;
      color:var(--text);
      background:rgba(255,255,255,.07);
    }
    .mobile-menu{
      display:none;
      margin-top:12px;
      padding:10px;
      border:1px solid var(--line);
      border-radius:20px;
      background:rgba(13,21,39,.92);
      box-shadow:var(--shadow-soft);
    }
    .mobile-menu.open{display:block}
    .mobile-menu .nav-link{padding:11px 12px}

    .content{
      width:calc(100% - var(--nav-w));
      margin-left:var(--nav-w);
      min-height:100vh;
    }
    .page-container{
      width:min(1220px, calc(100% - 48px));
      margin:0 auto;
    }
    .section{
      padding:96px 0;
      position:relative;
    }
    .section.tight{padding:68px 0}
    .section-head{
      max-width:780px;
      margin-bottom:34px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.14);
      color:#eaf3ff;
      font-size:13px;
      background:rgba(255,255,255,.065);
      backdrop-filter:blur(12px);
      box-shadow:0 0 22px rgba(105,227,255,.08);
    }
    .eyebrow i{color:var(--peach)}
    h1,h2,h3,h4,p{margin-top:0}
    h1{
      font-size:clamp(38px, 5.2vw, 76px);
      line-height:1.08;
      letter-spacing:-.055em;
      font-weight:800;
      margin:18px 0 22px;
    }
    h2{
      font-size:clamp(28px, 3vw, 44px);
      line-height:1.18;
      letter-spacing:-.035em;
      font-weight:800;
      margin-bottom:14px;
    }
    h3{
      font-size:22px;
      line-height:1.35;
      font-weight:750;
      margin-bottom:10px;
    }
    p{color:var(--muted);font-size:16px}
    .lead{
      font-size:18px;
      color:#c8d5ec;
      max-width:720px;
    }
    .gradient-text{
      background:linear-gradient(100deg, #fff 0%, #ffd2df 32%, #9befff 72%, #fff 100%);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }

    .hero{
      min-height:100vh;
      display:flex;
      align-items:center;
      padding:72px 0 74px;
      overflow:hidden;
    }
    .hero:before{
      content:"";
      position:absolute;
      right:5%;
      top:8%;
      width:420px;height:420px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(255,159,189,.2), transparent 66%);
      filter:blur(10px);
    }
    .hero-copy{position:relative;z-index:2}
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin:30px 0 28px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:48px;
      padding:13px 21px;
      border-radius:999px;
      font-weight:700;
      border:1px solid transparent;
      transition:transform var(--speed), box-shadow var(--speed), border-color var(--speed), background var(--speed);
      line-height:1.2;
    }
    .btn-primary{
      color:#101423;
      background:linear-gradient(135deg, var(--peach), var(--peach-2) 38%, var(--violet) 100%);
      box-shadow:0 14px 34px rgba(255,159,189,.26), 0 0 30px rgba(169,140,255,.12);
    }
    .btn-primary:hover{
      color:#101423;
      transform:translateY(-2px);
      box-shadow:0 18px 48px rgba(255,159,189,.34), 0 0 42px rgba(105,227,255,.15);
    }
    .btn-secondary{
      color:var(--text);
      background:rgba(255,255,255,.055);
      border-color:rgba(255,255,255,.18);
      backdrop-filter:blur(10px);
    }
    .btn-secondary:hover{
      transform:translateY(-2px);
      border-color:rgba(105,227,255,.42);
      background:rgba(105,227,255,.08);
      box-shadow:0 14px 32px rgba(0,0,0,.22);
    }
    .hero-note{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      align-items:center;
      color:var(--muted);
      font-size:14px;
    }
    .hero-note span{
      display:inline-flex;
      align-items:center;
      gap:7px;
    }
    .hero-note i{color:var(--green)}

    .glass-card{
      background:linear-gradient(180deg, rgba(255,255,255,.092), rgba(255,255,255,.052));
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-soft);
      backdrop-filter:blur(20px);
      position:relative;
      overflow:hidden;
      transition:transform var(--speed), border-color var(--speed), box-shadow var(--speed), background var(--speed);
    }
    .glass-card:before{
      content:"";
      position:absolute;
      left:18px;right:18px;top:0;height:1px;
      background:linear-gradient(90deg, transparent, rgba(255,255,255,.5), transparent);
      opacity:.72;
    }
    .glass-card:hover{
      transform:translateY(-4px);
      border-color:rgba(255,184,206,.34);
      box-shadow:var(--shadow), var(--glow);
      background:linear-gradient(180deg, rgba(255,255,255,.115), rgba(255,255,255,.06));
    }
    .hero-panel{
      padding:22px;
      max-width:490px;
      margin-left:auto;
      transform:translateY(18px);
    }
    .visual-orb{
      height:188px;
      border-radius:24px;
      position:relative;
      overflow:hidden;
      background:
        radial-gradient(circle at 28% 24%, rgba(255,255,255,.34), transparent 8%),
        radial-gradient(circle at 38% 45%, rgba(255,159,189,.55), transparent 17%),
        radial-gradient(circle at 66% 45%, rgba(105,227,255,.46), transparent 18%),
        linear-gradient(135deg, rgba(255,159,189,.18), rgba(169,140,255,.15), rgba(105,227,255,.12));
      border:1px solid rgba(255,255,255,.16);
      margin-bottom:18px;
    }
    .visual-orb:before{
      content:"";
      position:absolute;
      inset:26px;
      border-radius:26px;
      border:1px solid rgba(255,255,255,.2);
      transform:rotate(-8deg);
    }
    .visual-orb:after{
      content:"精品 · 免费 · 高效";
      position:absolute;
      left:22px;bottom:20px;
      font-size:20px;
      font-weight:800;
      letter-spacing:.04em;
    }
    .mini-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:12px;
      margin-bottom:16px;
    }
    .mini-item{
      padding:15px 12px;
      border-radius:18px;
      background:rgba(0,0,0,.16);
      border:1px solid rgba(255,255,255,.12);
    }
    .mini-item strong{display:block;font-size:22px;line-height:1;color:#fff}
    .mini-item span{display:block;margin-top:8px;color:var(--muted);font-size:12px}
    .data-strip{
      padding:13px 15px;
      border-radius:18px;
      background:linear-gradient(90deg, rgba(255,159,189,.13), rgba(105,227,255,.09));
      border:1px solid rgba(255,255,255,.14);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      color:#dce9ff;
      font-size:14px;
    }
    .bar{
      width:118px;height:8px;border-radius:999px;
      background:rgba(255,255,255,.12);
      overflow:hidden;
    }
    .bar span{
      display:block;width:82%;height:100%;
      border-radius:999px;
      background:linear-gradient(90deg, var(--peach), var(--cyan));
    }

    .trust-row{
      margin-top:-42px;
      position:relative;
      z-index:5;
    }
    .trust-card{
      padding:22px;
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:14px;
    }
    .trust-item{
      padding:10px 12px;
      border-right:1px solid var(--line);
    }
    .trust-item:last-child{border-right:0}
    .trust-item strong{
      display:block;
      font-size:27px;
      line-height:1.1;
      color:#fff;
      letter-spacing:-.02em;
    }
    .trust-item span{font-size:13px;color:var(--muted)}

    .feature-split{
      display:grid;
      grid-template-columns:.9fr 1.1fr;
      gap:24px;
      align-items:center;
      margin-top:24px;
    }
    .feature-split.reverse{grid-template-columns:1.1fr .9fr}
    .feature-split.reverse .feature-visual{order:2}
    .feature-visual{
      min-height:330px;
      padding:22px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
    }
    .screen-lines{display:grid;gap:12px}
    .screen-line{
      height:18px;border-radius:999px;
      background:linear-gradient(90deg, rgba(255,255,255,.17), rgba(255,255,255,.045));
      position:relative;
      overflow:hidden;
    }
    .screen-line:nth-child(2){width:84%}
    .screen-line:nth-child(3){width:66%}
    .screen-line:nth-child(4){width:92%}
    .screen-line:after{
      content:"";
      position:absolute;inset:0;
      width:42%;
      background:linear-gradient(90deg, transparent, rgba(105,227,255,.2), transparent);
      animation:shine 3.8s infinite;
    }
    @keyframes shine{0%{transform:translateX(-120%)}100%{transform:translateX(280%)}}
    .feature-content{padding:28px}
    .check-list{
      list-style:none;
      padding:0;
      margin:18px 0 0;
      display:grid;
      gap:12px;
    }
    .check-list li{
      display:flex;
      gap:11px;
      color:#d7e2f6;
      padding:12px 13px;
      border-radius:15px;
      background:rgba(255,255,255,.045);
      border:1px solid rgba(255,255,255,.08);
    }
    .check-list i{color:var(--green);margin-top:4px}
    .tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}
    .tag,.badge{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:7px 11px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.14);
      color:#dce8ff;
      background:rgba(255,255,255,.055);
      font-size:13px;
    }
    .tag.hot{border-color:rgba(255,159,189,.34);color:#ffe3eb;background:rgba(255,159,189,.09)}
    .tag.cool{border-color:rgba(105,227,255,.28);color:#ddf8ff;background:rgba(105,227,255,.08)}

    .category-entry{
      padding:26px;
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:24px;
      align-items:center;
      margin-top:20px;
    }
    .entry-cover{
      min-height:220px;
      border-radius:22px;
      background:
        radial-gradient(circle at 22% 22%, rgba(255,159,189,.34), transparent 18%),
        radial-gradient(circle at 74% 64%, rgba(105,227,255,.28), transparent 22%),
        linear-gradient(135deg, rgba(255,255,255,.1), rgba(255,255,255,.035));
      border:1px solid rgba(255,255,255,.14);
      position:relative;
      overflow:hidden;
    }
    .entry-cover:after{
      content:"内容精选";
      position:absolute;
      right:20px;bottom:18px;
      font-size:28px;
      font-weight:800;
      color:rgba(255,255,255,.88);
    }

    .scenario-wrap{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:18px;
      counter-reset:step;
    }
    .scenario-card{
      padding:24px;
      min-height:260px;
    }
    .scenario-card:after{
      counter-increment:step;
      content:"0" counter(step);
      position:absolute;
      right:20px;top:16px;
      font-size:46px;
      font-weight:800;
      color:rgba(255,255,255,.055);
      line-height:1;
    }
    .icon-bubble{
      width:46px;height:46px;border-radius:16px;
      display:grid;place-items:center;
      color:#111629;
      margin-bottom:18px;
      background:linear-gradient(135deg, var(--peach), var(--cyan));
      box-shadow:0 12px 28px rgba(105,227,255,.14);
    }

    .case-layout{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:20px;
      align-items:stretch;
    }
    .metric-stack{display:grid;gap:16px}
    .metric-card{padding:23px}
    .metric-card strong{font-size:42px;line-height:1;color:#fff;display:block}
    .metric-card span{color:var(--muted);font-size:14px}
    .case-card{padding:28px}
    .quote{
      margin:0;
      padding:20px;
      border-left:3px solid var(--peach);
      background:rgba(255,255,255,.05);
      border-radius:0 18px 18px 0;
      color:#dce6f8;
    }
    .case-points{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:12px;
      margin-top:20px;
    }
    .case-point{
      padding:14px;
      border-radius:16px;
      background:rgba(255,255,255,.045);
      border:1px solid rgba(255,255,255,.09);
    }
    .case-point b{display:block;color:#fff;margin-bottom:3px}
    .case-point small{color:var(--muted)}

    .pricing-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:18px;
    }
    .price-card{
      padding:26px;
      display:flex;
      flex-direction:column;
      min-height:430px;
    }
    .price-card.recommended{
      border-color:rgba(255,159,189,.42);
      box-shadow:var(--shadow-soft), 0 0 42px rgba(255,159,189,.12);
      transform:translateY(-8px);
    }
    .price-name{display:flex;align-items:center;justify-content:space-between;gap:12px}
    .price{
      margin:16px 0;
      font-size:34px;
      font-weight:800;
      letter-spacing:-.03em;
    }
    .price small{font-size:14px;color:var(--muted);font-weight:500}
    .price-list{
      list-style:none;
      padding:0;margin:8px 0 24px;
      display:grid;gap:10px;
    }
    .price-list li{display:flex;gap:9px;color:#d6e1f4}
    .price-list i{color:var(--cyan);margin-top:5px}
    .price-card .btn{margin-top:auto;width:100%}

    .faq-shell{
      display:grid;
      grid-template-columns:.75fr 1.25fr;
      gap:24px;
      align-items:start;
    }
    .accordion{
      background:transparent;
      border:0;
    }
    .accordion-item{
      margin-bottom:12px;
      border-radius:18px;
      overflow:hidden;
      border:1px solid var(--line);
      background:rgba(255,255,255,.055);
    }
    .accordion-title{
      color:#fff;
      font-weight:750;
      font-size:16px;
      border:0!important;
      padding:18px 48px 18px 20px;
      background:transparent;
    }
    .accordion-title:hover,.accordion-title:focus{
      background:rgba(105,227,255,.07);
      color:#fff;
    }
    .accordion-title:before{color:var(--peach);right:18px;margin-top:-.55rem}
    .accordion-content{
      border:0;
      background:rgba(5,8,18,.2);
      color:var(--muted);
      padding:0 20px 20px;
    }

    .cta-panel{
      padding:34px;
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:26px;
      align-items:center;
      background:
        radial-gradient(circle at 12% 20%, rgba(255,159,189,.2), transparent 28%),
        radial-gradient(circle at 85% 40%, rgba(105,227,255,.16), transparent 30%),
        linear-gradient(135deg, rgba(255,255,255,.105), rgba(255,255,255,.052));
    }
    .contact-form{
      display:grid;
      gap:12px;
    }
    .input{
      width:100%;
      min-height:48px;
      padding:12px 15px;
      border-radius:16px;
      border:1px solid rgba(255,255,255,.14);
      background:rgba(6,10,20,.5);
      color:#fff;
      box-shadow:none;
      transition:border-color var(--speed), box-shadow var(--speed), background var(--speed);
    }
    textarea.input{min-height:104px;resize:vertical}
    .input::placeholder{color:#74839e}
    .input:focus{
      border-color:rgba(105,227,255,.52);
      background:rgba(6,10,20,.68);
      box-shadow:0 0 0 4px rgba(105,227,255,.08);
      outline:none;
    }
    .form-hint{
      color:var(--muted-2);
      font-size:12px;
      margin:0;
    }

    .site-footer{
      padding:46px 0 30px;
      border-top:1px solid var(--line);
      background:linear-gradient(180deg, rgba(5,8,16,.22), rgba(5,8,16,.72));
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr .8fr;
      gap:24px;
      align-items:start;
    }
    .footer-brand{
      display:flex;gap:12px;align-items:flex-start;
    }
    .footer-brand strong{display:block;font-size:18px;line-height:1.35}
    .footer-title{
      color:#fff;
      font-weight:800;
      margin-bottom:10px;
    }
    .footer-links{
      list-style:none;padding:0;margin:0;display:grid;gap:8px;
    }
    .footer-links a{color:var(--muted)}
    .footer-links a:hover{color:#fff;transform:translateX(2px)}
    .copyright{
      margin-top:30px;
      padding-top:18px;
      border-top:1px solid var(--line);
      color:var(--muted-2);
      font-size:13px;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      justify-content:space-between;
    }

    @media (max-width:1280px){
      :root{--nav-w:258px}
      .page-container{width:min(1120px, calc(100% - 38px))}
      .hero-panel{max-width:450px}
      h1{font-size:clamp(36px, 5vw, 64px)}
    }
    @media (max-width:1024px){
      .side-nav{display:none}
      .mobile-top{display:block}
      .content{width:100%;margin-left:0}
      .hero{min-height:auto;padding:64px 0 72px}
      .hero-panel{margin:28px 0 0;max-width:none}
      .trust-row{margin-top:0}
      .trust-card{grid-template-columns:repeat(2,1fr)}
      .trust-item:nth-child(2){border-right:0}
      .feature-split,.feature-split.reverse,.category-entry,.case-layout,.faq-shell,.cta-panel,.footer-grid{
        grid-template-columns:1fr;
      }
      .feature-split.reverse .feature-visual{order:0}
      .pricing-grid,.scenario-wrap{grid-template-columns:1fr 1fr}
      .price-card.recommended{transform:none}
      .section{padding:76px 0}
    }
    @media (max-width:768px){
      .page-container{width:min(100% - 28px, 720px)}
      .section{padding:62px 0}
      .section.tight{padding:52px 0}
      .hero{padding:48px 0 56px}
      .hero-actions .btn{width:100%}
      .mini-grid,.pricing-grid,.scenario-wrap,.case-points{grid-template-columns:1fr}
      .trust-card{grid-template-columns:1fr}
      .trust-item{border-right:0;border-bottom:1px solid var(--line)}
      .trust-item:last-child{border-bottom:0}
      .category-entry,.feature-content,.case-card,.cta-panel{padding:22px}
      h1{letter-spacing:-.04em}
    }
    @media (max-width:520px){
      .mobile-brand strong{max-width:235px}
      .brand-mark{width:42px;height:42px;min-width:42px}
      .hero-note{display:grid}
      .data-strip{align-items:flex-start;flex-direction:column}
      .bar{width:100%}
      .visual-orb{height:158px}
      .visual-orb:after{font-size:18px}
      .footer-grid{gap:18px}
      .copyright{display:grid}
    }

/* roulang page: category1 */
:root{
      --bg:#070b18;
      --bg-2:#0b1224;
      --panel:rgba(255,255,255,.075);
      --panel-strong:rgba(255,255,255,.115);
      --text:#f5f7ff;
      --muted:#aeb8d6;
      --soft:#7f8aae;
      --line:rgba(255,255,255,.14);
      --line-strong:rgba(255,255,255,.24);
      --cyan:#69e7ff;
      --peach:#ff9a9e;
      --pink:#ff6fb7;
      --purple:#9b7cff;
      --green:#7cf5c8;
      --warning:#ffd38a;
      --radius-sm:12px;
      --radius:18px;
      --radius-lg:26px;
      --shadow:0 22px 70px rgba(0,0,0,.34);
      --shadow-soft:0 12px 34px rgba(0,0,0,.22);
      --glow:0 0 0 1px rgba(255,255,255,.13), 0 0 34px rgba(255,111,183,.16);
      --nav-width:292px;
      --container:1180px;
      --ease:all .25s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
      color:var(--text);
      line-height:1.75;
      background:
        radial-gradient(circle at 78% 10%, rgba(255,111,183,.20), transparent 34%),
        radial-gradient(circle at 18% 14%, rgba(105,231,255,.16), transparent 32%),
        radial-gradient(circle at 62% 92%, rgba(155,124,255,.18), transparent 38%),
        linear-gradient(135deg,#060914 0%,#0b1021 46%,#090b17 100%);
      min-height:100vh;
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      z-index:-1;
      background-image:
        linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
      background-size:42px 42px;
      mask-image:linear-gradient(to bottom,rgba(0,0,0,.75),rgba(0,0,0,.18));
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    img{max-width:100%;height:auto}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    :focus-visible{outline:3px solid rgba(105,231,255,.55);outline-offset:3px;border-radius:12px}
    .page-shell{display:flex;min-height:100vh}
    .page-main{width:calc(100% - var(--nav-width));margin-left:var(--nav-width);position:relative}
    .page-container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .section{padding:78px 0}
    .section.compact{padding:54px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:28px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;
      border:1px solid rgba(105,231,255,.24);
      background:rgba(105,231,255,.08);
      color:#dffaff;
      border-radius:999px;
      font-size:13px;
      font-weight:700;
      letter-spacing:.04em;
    }
    .eyebrow:before{content:"";width:7px;height:7px;border-radius:999px;background:linear-gradient(135deg,var(--peach),var(--cyan));box-shadow:0 0 16px rgba(255,154,158,.6)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(34px,5vw,64px);line-height:1.08;font-weight:800;letter-spacing:-.04em;margin-bottom:20px}
    h2{font-size:clamp(26px,3vw,40px);line-height:1.18;font-weight:800;letter-spacing:-.03em;margin-bottom:12px}
    h3{font-size:20px;line-height:1.35;font-weight:760;margin-bottom:10px}
    p{color:var(--muted);margin-bottom:16px}
    .lead{font-size:18px;color:#d6dcf4;max-width:760px}
    .side-nav{
      position:fixed;left:0;top:0;bottom:0;width:var(--nav-width);
      padding:24px 18px;
      border-right:1px solid var(--line);
      background:linear-gradient(180deg,rgba(8,13,28,.88),rgba(8,10,20,.72));
      backdrop-filter:blur(22px);
      z-index:50;
      display:flex;
      flex-direction:column;
      box-shadow:18px 0 50px rgba(0,0,0,.2);
    }
    .side-nav-logo{
      display:flex;flex-direction:column;gap:8px;
      padding:17px 16px 18px;
      border:1px solid rgba(255,255,255,.16);
      border-radius:22px;
      background:
        radial-gradient(circle at 20% 20%,rgba(255,154,158,.22),transparent 36%),
        linear-gradient(135deg,rgba(255,255,255,.11),rgba(255,255,255,.045));
      box-shadow:var(--glow);
      position:relative;
      overflow:hidden;
    }
    .side-nav-logo:before,.brand-mark:before{
      content:"";width:38px;height:38px;border-radius:38% 62% 46% 54%;
      background:linear-gradient(135deg,var(--peach),var(--purple) 58%,var(--cyan));
      box-shadow:0 0 22px rgba(255,111,183,.35);
      display:block;margin-bottom:4px;
    }
    .logo-main{font-size:16px;line-height:1.38;font-weight:800;color:#fff}
    .logo-sub{font-size:12px;color:var(--soft);letter-spacing:.08em}
    .side-nav-links{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:10px}
    .side-nav-link{
      display:flex;align-items:center;gap:10px;
      min-height:46px;
      padding:11px 13px;
      border:1px solid transparent;
      border-radius:16px;
      color:#c4cce6;
      font-weight:700;
    }
    .side-nav-link:hover{background:rgba(255,255,255,.07);border-color:rgba(105,231,255,.18);color:#fff;transform:translateX(2px)}
    .side-nav-link.active{
      background:linear-gradient(135deg,rgba(255,111,183,.17),rgba(105,231,255,.09));
      border-color:rgba(255,154,158,.38);
      color:#fff;
      box-shadow:inset 3px 0 0 rgba(255,154,158,.95),0 0 22px rgba(255,111,183,.13);
    }
    .nav-icon{color:var(--peach);font-size:24px;line-height:0}
    .side-nav-footer{
      margin-top:auto;
      padding:14px;
      border-top:1px solid var(--line);
      color:var(--soft);
      font-size:12px;
      letter-spacing:.08em;
    }
    .mobile-topbar{
      display:none;position:sticky;top:0;z-index:60;
      padding:12px 16px;
      border-bottom:1px solid var(--line);
      background:rgba(7,11,24,.82);
      backdrop-filter:blur(20px);
    }
    .mobile-row{display:flex;align-items:center;justify-content:space-between;gap:14px}
    .mobile-brand{display:flex;align-items:center;gap:10px;font-weight:800;line-height:1.25;font-size:14px;max-width:76%}
    .mobile-brand .brand-mark{width:32px;height:32px;display:block;flex:0 0 auto}
    .mobile-brand .brand-mark:before{width:32px;height:32px;margin:0}
    .menu-toggle{
      width:44px;height:40px;border-radius:14px;
      border:1px solid rgba(255,255,255,.18);
      background:rgba(255,255,255,.07);
      color:#fff;
      display:grid;place-items:center;
    }
    .mobile-menu{display:none;margin-top:12px;padding:12px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.07)}
    .mobile-menu.open{display:grid;gap:8px}
    .mobile-menu a{padding:11px 12px;border-radius:13px;color:#d9def2;font-weight:700}
    .mobile-menu a.active,.mobile-menu a:hover{background:rgba(255,111,183,.16);color:#fff}
    .hero{
      padding:72px 0 44px;
      position:relative;
      overflow:hidden;
    }
    .hero:after{
      content:"";
      position:absolute;
      right:-120px;top:30px;
      width:420px;height:420px;border-radius:50%;
      background:radial-gradient(circle,rgba(255,154,158,.18),transparent 68%);
      filter:blur(3px);
      pointer-events:none;
    }
    .hero-card{
      padding:34px;
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:
        linear-gradient(135deg,rgba(255,255,255,.10),rgba(255,255,255,.045)),
        radial-gradient(circle at 15% 5%,rgba(105,231,255,.16),transparent 34%);
      box-shadow:var(--shadow);
      backdrop-filter:blur(20px);
      position:relative;
      overflow:hidden;
    }
    .hero-card:before,.glass-card:before,.feature-panel:before{
      content:"";position:absolute;left:18px;right:18px;top:0;height:1px;
      background:linear-gradient(90deg,transparent,rgba(255,154,158,.74),rgba(105,231,255,.58),transparent);
      opacity:.8;
    }
    .hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:46px;padding:12px 20px;border-radius:999px;
      border:1px solid transparent;
      font-weight:800;
      line-height:1;
      transition:var(--ease);
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg,var(--peach),var(--pink) 48%,var(--purple));
      box-shadow:0 10px 28px rgba(255,111,183,.24);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 38px rgba(255,111,183,.34);color:#fff}
    .btn-secondary{
      color:#eef4ff;
      background:rgba(255,255,255,.065);
      border-color:rgba(255,255,255,.18);
    }
    .btn-secondary:hover{border-color:rgba(105,231,255,.46);background:rgba(105,231,255,.09);color:#fff;transform:translateY(-2px)}
    .chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .chip,.tag{
      display:inline-flex;align-items:center;gap:7px;
      padding:8px 12px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.16);
      background:rgba(255,255,255,.055);
      color:#dce4ff;
      font-size:13px;
      font-weight:700;
      transition:var(--ease);
    }
    .chip:hover,.chip.active{border-color:rgba(255,154,158,.44);background:rgba(255,154,158,.12);transform:translateY(-1px)}
    .hero-metrics{
      display:grid;grid-template-columns:repeat(2,1fr);gap:14px;
      margin-top:10px;
    }
    .metric{
      padding:18px;
      border-radius:18px;
      background:rgba(255,255,255,.07);
      border:1px solid rgba(255,255,255,.13);
    }
    .metric strong{display:block;font-size:28px;line-height:1.1;color:#fff}
    .metric span{display:block;margin-top:6px;color:var(--muted);font-size:13px}
    .filter-bar{
      display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
      padding:16px;
      border:1px solid var(--line);
      border-radius:22px;
      background:rgba(255,255,255,.06);
      backdrop-filter:blur(16px);
      box-shadow:var(--shadow-soft);
    }
    .search-box{position:relative;min-width:280px;flex:1;max-width:460px}
    .search-box input{
      width:100%;
      height:46px;
      padding:0 16px 0 42px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.15);
      background:rgba(5,8,18,.42);
      color:#fff;
      outline:none;
      transition:var(--ease);
    }
    .search-box input:focus{border-color:rgba(105,231,255,.55);box-shadow:0 0 0 4px rgba(105,231,255,.08)}
    .search-box:before{content:"⌕";position:absolute;left:17px;top:8px;color:var(--cyan);font-size:22px;z-index:1}
    .glass-card,.feature-panel{
      position:relative;
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:linear-gradient(135deg,rgba(255,255,255,.09),rgba(255,255,255,.04));
      backdrop-filter:blur(18px);
      box-shadow:var(--shadow-soft);
      overflow:hidden;
      transition:var(--ease);
    }
    .glass-card:hover,.feature-panel:hover{transform:translateY(-4px);border-color:rgba(105,231,255,.32);box-shadow:var(--shadow)}
    .content-layout{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,.75fr);gap:24px;align-items:start}
    .featured-card{padding:28px;min-height:100%}
    .featured-meta{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}
    .card-list{display:grid;gap:16px;margin-top:18px}
    .selection-card{
      display:grid;
      grid-template-columns:1fr auto;
      gap:18px;
      align-items:center;
      padding:22px;
    }
    .selection-card p{margin-bottom:0}
    .card-action{align-self:end;white-space:nowrap}
    .side-stack{display:grid;gap:16px}
    .side-card{padding:22px}
    .side-card ul{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:12px}
    .side-card li{display:flex;gap:10px;color:#d4dcf5;font-size:14px}
    .side-card li:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 14px rgba(124,245,200,.45);margin-top:9px;flex:0 0 auto}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .feature-panel{padding:24px}
    .feature-icon{
      width:46px;height:46px;border-radius:16px;
      display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(255,154,158,.24),rgba(105,231,255,.12));
      border:1px solid rgba(255,255,255,.14);
      margin-bottom:16px;
      font-weight:900;color:#fff;
    }
    .timeline{display:grid;gap:16px;counter-reset:step}
    .timeline-item{
      counter-increment:step;
      display:grid;grid-template-columns:70px 1fr;gap:18px;align-items:start;
      padding:22px;border-radius:22px;border:1px solid var(--line);
      background:rgba(255,255,255,.055);
    }
    .timeline-item:before{
      content:counter(step,decimal-leading-zero);
      width:54px;height:54px;border-radius:18px;
      display:grid;place-items:center;
      background:linear-gradient(135deg,var(--peach),var(--purple));
      font-weight:900;box-shadow:0 12px 24px rgba(255,111,183,.2);
    }
    .faq-wrap{max-width:920px;margin:0 auto}
    .accordion{
      background:transparent;
      border:0;
    }
    .accordion-item{
      margin-bottom:12px;
      border:1px solid var(--line);
      border-radius:18px;
      background:rgba(255,255,255,.06);
      overflow:hidden;
    }
    .accordion-title{
      border:0!important;
      color:#fff!important;
      background:transparent!important;
      font-weight:800;
      font-size:16px;
      padding:18px 48px 18px 20px;
    }
    .accordion-title:hover,.accordion-title:focus{background:rgba(255,255,255,.06)!important;color:#fff!important}
    .accordion-title:before{color:var(--peach);font-size:22px;margin-top:-13px}
    .accordion-content{
      border:0!important;
      background:rgba(5,8,18,.18)!important;
      color:var(--muted);
      padding:0 20px 20px;
    }
    .cta-box{
      padding:34px;
      border-radius:30px;
      border:1px solid rgba(255,154,158,.26);
      background:
        radial-gradient(circle at 18% 10%,rgba(255,154,158,.20),transparent 34%),
        radial-gradient(circle at 86% 22%,rgba(105,231,255,.16),transparent 36%),
        linear-gradient(135deg,rgba(255,255,255,.10),rgba(255,255,255,.045));
      box-shadow:var(--shadow);
      display:grid;
      grid-template-columns:1fr auto;
      gap:24px;
      align-items:center;
    }
    .contact-mini{
      display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:18px;
    }
    .contact-mini span{
      padding:12px 14px;border-radius:16px;border:1px solid var(--line);
      background:rgba(255,255,255,.055);color:#dce4ff;font-weight:700;font-size:14px;
    }
    .site-footer{
      padding:44px 0 28px;
      border-top:1px solid var(--line);
      background:linear-gradient(180deg,rgba(8,12,26,.34),rgba(4,6,13,.82));
    }
    .footer-grid{display:grid;grid-template-columns:1.4fr .7fr .7fr;gap:28px}
    .footer-brand{display:flex;gap:14px;align-items:flex-start}
    .brand-mark{width:42px;height:42px;display:block;flex:0 0 auto}
    .brand-mark:before{width:42px;height:42px;margin:0}
    .footer-brand strong{font-size:18px;color:#fff}
    .footer-title{font-weight:800;color:#fff;margin-bottom:12px}
    .footer-links{list-style:none;margin:0;padding:0;display:grid;gap:9px}
    .footer-links a{color:var(--muted)}
    .footer-links a:hover{color:#fff;padding-left:3px}
    .copyright{
      margin-top:28px;padding-top:18px;border-top:1px solid var(--line);
      display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
      color:var(--soft);font-size:13px;
    }
    @media (max-width:1280px){
      :root{--nav-width:260px}
      .page-container{width:min(1040px,calc(100% - 40px))}
      .grid-3{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:1024px){
      .side-nav{display:none}
      .mobile-topbar{display:block}
      .page-main{width:100%;margin-left:0}
      .hero{padding-top:38px}
      .content-layout{grid-template-columns:1fr}
      .cta-box{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:768px){
      .section{padding:56px 0}
      .section-head{display:block}
      .hero-card{padding:24px}
      .filter-bar{align-items:stretch}
      .search-box{min-width:100%;max-width:none}
      .selection-card{grid-template-columns:1fr}
      .grid-3{grid-template-columns:1fr}
      .hero-metrics{grid-template-columns:1fr}
      .timeline-item{grid-template-columns:1fr}
      .contact-mini{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
    }
    @media (max-width:520px){
      .page-container{width:calc(100% - 28px)}
      h1{font-size:34px}
      .hero-actions .btn{width:100%}
      .cta-box{padding:24px}
      .mobile-brand{font-size:13px}
      .chip-row{gap:8px}
      .chip,.tag{font-size:12px}
    }