/* roulang page: index */
:root{
      --ink:#1C1F24;--steel:#3E4550;--paper:#F3EFE8;--spark:#E35A12;--ember:#F4A261;--cool:#1F7A6B;--line:#C9C2B6;
      --white:#FFFBFC;--card:#FFFDF8;--deep:#14171C;--muted:#6A6460;--ok:#1F7A6B;
      --r:24px;--r-sm:14px;--shadow:0 6px 0 rgba(28,31,36,.12);--shadow-hover:0 10px 0 rgba(227,90,18,.18);
      --grad:linear-gradient(135deg,#1C1F24 0%,#E35A12 100%);--grad-warm:linear-gradient(135deg,#3E4550 0%,#F4A261 100%);
      --space:88px;--nav-h:118px;--mono:"JetBrains Mono",ui-monospace,Menlo,monospace;
    }
    *,*::before,*::after{box-sizing:border-box}html{scroll-behavior:smooth}html,body{margin:0}
    body{font-family:"Noto Sans SC","Source Han Sans SC",sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:17px;background-image:linear-gradient(135deg,rgba(201,194,182,.14) 25%,transparent 25%,transparent 50%,rgba(201,194,182,.14) 50%,rgba(201,194,182,.14) 75%,transparent 75%,transparent);background-size:18px 18px}
    img{max-width:100%;display:block;height:auto}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer}
    h1,h2,h3{line-height:1.25;margin:0 0 14px}h2{font-size:32px;font-weight:800;letter-spacing:.02em}h3{font-size:20px;font-weight:700}
    p{margin:0 0 14px}.container{width:min(1200px,calc(100% - 32px));margin:0 auto}
    .skip{position:absolute;left:-999px;top:8px}.skip:focus{left:8px;background:#fff;padding:8px 12px;z-index:80}
    .topbar{background:var(--ink);color:#f6f1ea;font-size:13px}
    .topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:46px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.08em}
    .logo-mark{width:28px;height:28px;border-radius:8px;background:var(--grad);display:grid;place-items:center;color:#fff;font-size:12px}
    .verify{color:#d7cfc4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .top-actions{display:flex;align-items:center;gap:10px}
    .tel{color:#fff;min-height:44px;display:inline-flex;align-items:center}
    header{position:sticky;top:0;z-index:40;background:rgba(243,239,232,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(8px)}
    .nav-row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:72px}
    .nav-links{display:flex;flex-wrap:wrap;gap:6px 18px}
    .nav-links a{min-height:44px;display:inline-flex;align-items:center;font-weight:500;color:var(--steel);position:relative}
    .nav-links a:hover,.nav-links a.is-active{color:var(--spark)}
    .nav-links a.is-active::after{content:"";position:absolute;left:0;right:0;bottom:8px;height:2px;background:var(--spark)}
    .menu-btn{display:none;min-width:44px;min-height:44px;border:1px solid var(--line);background:#fff;border-radius:12px}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:999px;border:1px solid transparent;font-weight:700;transition:.2s transform,.2s filter}
    .btn-primary{background:var(--grad);color:#fff}.btn-ghost{background:transparent;border-color:#c9c2b6;color:#fff}.btn-steel{background:#fff;border-color:var(--steel);color:var(--steel)}
    .btn:hover{transform:translateY(-2px);filter:brightness(1.06)}.btn:active{transform:translateY(1px) scale(.99)}.btn:focus-visible,.nav-links a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,.menu-btn:focus-visible{outline:2px solid var(--spark);outline-offset:2px}
    .hero{position:relative;color:#fff;min-height:760px;overflow:hidden}
    .slides{position:absolute;inset:0}.slide{position:absolute;inset:0;opacity:0;transition:opacity .6s}.slide.is-on{opacity:1}
    .slide-bg{position:absolute;inset:0;background-size:cover;background-position:center}.slide-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(20,23,28,.82),rgba(20,23,28,.35) 58%,rgba(20,23,28,.5))}
    .hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:28px;padding:54px 0 72px}
    .kicker{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(244,162,97,.5);border-radius:999px;padding:6px 12px;font-size:13px;margin-bottom:16px}
    .hero h1{font-size:46px;font-weight:800;max-width:16ch}.lead{font-size:18px;max-width:42ch;color:#f4ece3}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0}
    .quiz{background:rgba(255,253,248,.96);color:var(--ink);border-radius:28px;padding:22px;box-shadow:var(--shadow)}
    .quiz h2{font-size:22px}.opts{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 14px}
    .opt{min-height:44px;padding:0 12px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--steel)}
    .opt.is-on{border-color:var(--spark);color:var(--spark);box-shadow:inset 0 0 0 1px var(--spark)}
    .preview{background:var(--ink);color:#fff;border-radius:18px;padding:14px;margin-top:8px}
    .preview b{background:linear-gradient(135deg,#F4A261,#E35A12);-webkit-background-clip:text;background-clip:text;color:transparent}
    .hero-ctrl{position:absolute;z-index:3;right:4%;bottom:22px;display:flex;gap:8px;align-items:center}
    .dot,.ctrl{width:44px;height:44px;border:0;border-radius:12px;background:rgba(255,255,255,.16);color:#fff}
    .dot.is-on{background:var(--spark)}
    .bento{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}
    .card{background:var(--card);border-radius:var(--r);padding:22px;box-shadow:var(--shadow);position:relative;transition:.2s transform,.2s box-shadow,border-color .2s;border:1.5px solid transparent}
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--spark)}
    .span6{grid-column:span 6}.span4{grid-column:span 4}.span8{grid-column:span 8}.span3{grid-column:span 3}.span12{grid-column:span 12}
    .badge{position:absolute;top:14px;right:14px;background:var(--grad);color:#fff;border-radius:999px;padding:8px 12px;font-family:var(--mono);font-size:12px;line-height:1.2}
    .badge b{display:block;font-size:20px}.num{font-family:var(--mono);font-size:42px;font-weight:700;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
    section{padding:var(--space) 0}.sec-head{max-width:760px;margin-bottom:28px}.sec-head p{color:var(--steel)}
    .split{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:center}
    .cover{border-radius:28px;overflow:hidden;box-shadow:var(--shadow);min-height:360px;object-fit:cover;width:100%;height:100%}
    .matrix{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}
    .matrix .card:nth-child(1){grid-column:span 7}.matrix .card:nth-child(2){grid-column:span 5}.matrix .card:nth-child(3),.matrix .card:nth-child(4){grid-column:span 6}.matrix .card:nth-child(5){grid-column:span 5}.matrix .card:nth-child(6){grid-column:span 7}
    .machines{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:16px}
    .machine{min-height:460px;background:#111;color:#fff;border-radius:28px;overflow:hidden;position:relative;display:flex;flex-direction:column;justify-content:flex-end;padding:22px}
    .machine img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.55}
    .machine > *{position:relative;z-index:1}.param{font-size:14px;color:#efe6dc}
    .compare{display:grid;grid-template-columns:1fr 72px 1fr;gap:12px;align-items:stretch}
    .axis{background:var(--grad-warm);border-radius:20px;display:flex;align-items:center;justify-content:center;color:#fff;writing-mode:vertical-rl}
    table{width:100%;border-collapse:collapse}th,td{padding:12px 10px;text-align:left;border-bottom:1px solid var(--line)}
    .dark{position:relative;color:#fff;background:#12151a}.dark::before{content:"";position:absolute;inset:0;background:url("/assets/images/e3b3c2d19f556585.jpg") center/cover;opacity:.28}
    .dark .container{position:relative}.case-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:16px}
    .timeline{display:flex;gap:10px;overflow:auto}.node{min-width:180px;background:#fff;border-radius:20px;padding:16px;box-shadow:var(--shadow)}
    .stories{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:16px}
    .reviews{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}
    .reviews article:nth-child(1){grid-column:span 7}.reviews article:nth-child(2){grid-column:span 5}.reviews article:nth-child(3){grid-column:span 4}.reviews article:nth-child(4){grid-column:span 8}
    .news{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .news time{font-family:var(--mono);color:var(--muted);font-size:13px}
    .ensure{display:grid;gap:12px}.ensure-item{display:grid;grid-template-columns:160px 1fr auto;gap:12px;align-items:center;background:#fff;border-radius:20px;padding:14px 16px;box-shadow:var(--shadow)}
    .qa{display:grid;gap:10px}.qa details,.qa-line{background:#fff;border-radius:16px;padding:14px 16px;box-shadow:var(--shadow)}
    .faq-item{background:#fff;border-radius:18px;padding:0;margin-bottom:10px;box-shadow:var(--shadow);overflow:hidden}
    .faq-item button{width:100%;text-align:left;background:none;border:0;min-height:56px;padding:14px 18px;display:flex;justify-content:space-between;align-items:center;font-weight:700}
    .faq-item .ans{display:none;padding:0 18px 16px;border-left:3px solid var(--spark);margin:0 18px 14px}
    .faq-item.is-open .ans{display:block}
    .form-wrap{display:grid;grid-template-columns:1.3fr .7fr;gap:18px}
    label{display:block;font-weight:600;margin:10px 0 6px}input,select,textarea{width:100%;min-height:44px;border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:#fff}
    textarea{min-height:110px;resize:vertical}.form-note{display:none;background:#ecf7f3;color:var(--ok);padding:12px;border-radius:12px}
    .side-box{background:var(--ink);color:#fff;border-radius:28px;padding:22px}
    .cta-bar{background:var(--grad);color:#fff;border-radius:28px;padding:28px;display:flex;justify-content:space-between;align-items:center;gap:16px}
    footer{background:var(--deep);color:#e7e0d6;padding:54px 0 24px}footer a:hover{color:var(--ember)}
    .foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:18px}.copy{border-top:1px solid #2c3138;margin-top:28px;padding-top:16px;color:#b7b1a8;font-size:14px}
    .drawer{position:fixed;inset:0 0 0 auto;width:min(86vw,360px);background:#fff;transform:translateX(100%);transition:.25s;z-index:50;padding:24px;box-shadow:-8px 0 0 rgba(0,0,0,.08)}
    .drawer.is-open{transform:none}.drawer a{display:flex;align-items:center;min-height:44px}
    .fit{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    @media (max-width:1280px){h2{font-size:30px}.hero h1{font-size:40px}}
    @media (max-width:1024px){.hero-grid,.split,.machines,.case-grid,.stories,.form-wrap,.foot-grid,.compare,.fit{grid-template-columns:1fr}.axis{writing-mode:horizontal-tb;min-height:44px}.span6,.span4,.span8,.span3,.matrix .card,.reviews article{grid-column:span 12}.nav-links{display:none}.menu-btn{display:inline-flex;align-items:center;justify-content:center}header.is-compact .topbar{display:none}}
    @media (max-width:768px){:root{--space:64px;--nav-h:72px}.hero{min-height:auto}.hero-grid{padding:28px 0 96px}.hero h1{font-size:32px}.ensure-item{grid-template-columns:1fr}.news{grid-template-columns:1fr}.cta-bar{flex-direction:column;align-items:flex-start}}
    @media (max-width:375px){body{font-size:16px}.container{width:calc(100% - 20px)}.hero h1{font-size:28px}}