/* roulang page: index */
:root{
      --ink:#12151f;--muted:#6e7485;--paper:#f7f8fc;--white:#fff;
      --violet:#744cff;--cyan:#26d9c4;--pink:#ff5c91;--line:#e8eaf1;
      --radius:24px;--shadow:0 18px 50px rgba(21,25,45,.09);--ease:all .25s ease;
    }
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC",sans-serif;line-height:1.7}a{text-decoration:none;color:inherit}img{display:block;width:100%;object-fit:cover}button{font:inherit;border:0} .container{max-width:1180px}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(247,248,252,.88);backdrop-filter:blur(18px);border-bottom:1px solid rgba(232,234,241,.8)}
    .navbar{padding:16px 0}.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.02em}.brand-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,var(--violet),var(--pink));display:grid;place-items:center;color:#fff;font-size:18px;box-shadow:0 8px 20px rgba(116,76,255,.25)}.brand-name{font-size:17px}
    .nav-link{color:var(--muted)!important;font-size:14px;font-weight:600;margin:0 5px;padding:9px 12px!important;border-radius:10px;transition:var(--ease)}.nav-link:hover,.nav-link.active{color:var(--ink)!important;background:#fff;box-shadow:0 5px 16px rgba(21,25,45,.06)}
    .nav-action{background:var(--ink);color:#fff;border-radius:12px;padding:10px 17px;font-size:14px;font-weight:700;transition:var(--ease)}.nav-action:hover{background:var(--violet);transform:translateY(-2px)}
    .hero{position:relative;overflow:hidden;padding:82px 0 72px;background:linear-gradient(125deg,#121525 0%,#202045 57%,#382c70 100%);color:#fff}.hero:after{content:"";position:absolute;width:460px;height:460px;border:1px solid rgba(255,255,255,.1);border-radius:50%;right:-100px;top:-180px;box-shadow:0 0 0 50px rgba(255,255,255,.025),0 0 0 100px rgba(255,255,255,.018)}
    .hero-content{position:relative;z-index:1}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:#bdb8ff;font-size:13px;font-weight:700;letter-spacing:.08em;margin-bottom:18px}.eyebrow:before{content:"";width:24px;height:2px;background:var(--cyan)}h1{font-size:clamp(34px,5vw,64px);line-height:1.2;letter-spacing:-.045em;margin:0 0 20px;font-weight:800}.hero h1 em{font-style:normal;color:var(--cyan)}.hero-copy{max-width:670px;color:#c7c9d9;font-size:17px;margin-bottom:30px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.btn-primary-custom,.btn-light-custom{border-radius:13px;padding:13px 22px;font-weight:700;transition:var(--ease);display:inline-flex;align-items:center;gap:8px}.btn-primary-custom{background:var(--cyan);color:#102029}.btn-primary-custom:hover{background:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(38,217,196,.24)}.btn-light-custom{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#fff}.btn-light-custom:hover{background:#fff;color:var(--ink)}.hero-panel{margin-top:42px;position:relative;z-index:1;display:flex;gap:14px;flex-wrap:wrap}.hero-stat{min-width:160px;padding:15px 18px;border:1px solid rgba(255,255,255,.13);border-radius:16px;background:rgba(255,255,255,.08)}.hero-stat strong{display:block;font-size:25px;color:#fff}.hero-stat span{font-size:12px;color:#afb3c7}
    section{padding:78px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:30px}.section-kicker{color:var(--violet);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.section-title{font-size:32px;line-height:1.3;letter-spacing:-.035em;margin:6px 0 0;font-weight:800}.section-desc{max-width:570px;color:var(--muted);font-size:15px;margin:8px 0 0}.text-link{color:var(--violet);font-weight:700;font-size:14px;white-space:nowrap}.text-link:hover{color:var(--pink)}
    .kpi-section{background:#fff;border-bottom:1px solid var(--line)}.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:20px;overflow:hidden}.kpi{background:#fff;padding:25px}.kpi strong{display:block;font-size:34px;line-height:1.2}.kpi span{display:block;color:var(--muted);font-size:13px;margin-top:5px}.kpi b{color:var(--cyan);font-size:12px}
    .matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.matrix-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;min-height:190px;transition:var(--ease)}.matrix-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#d9d2ff}.matrix-icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:#f0edff;color:var(--violet);font-weight:800;margin-bottom:18px}.matrix-card:nth-child(2) .matrix-icon{background:#e5faf7;color:#0aa993}.matrix-card:nth-child(3) .matrix-icon{background:#fff0f5;color:var(--pink)}.matrix-card h3{font-size:18px;margin:0 0 8px}.matrix-card p{color:var(--muted);font-size:13px;margin:0}
    .contrast{background:#141726;color:#fff}.contrast .section-title{color:#fff}.contrast .section-desc{color:#aeb1c2}.compare{display:grid;grid-template-columns:1fr 1fr;gap:18px}.compare-box{padding:27px;border-radius:var(--radius);border:1px solid rgba(255,255,255,.12)}.compare-box.old{background:rgba(255,255,255,.04)}.compare-box.new{background:linear-gradient(135deg,rgba(116,76,255,.38),rgba(38,217,196,.14));border-color:rgba(38,217,196,.4)}.compare-box h3{font-size:19px;margin:0 0 18px}.compare-list{list-style:none;margin:0;padding:0}.compare-list li{padding:11px 0;border-top:1px solid rgba(255,255,255,.1);color:#c7c9d4;font-size:14px}.compare-list li:before{content:"✓";color:var(--cyan);margin-right:10px;font-weight:800}
    .milestone{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:2px solid #ded9ff}.milestone-item{padding:24px 20px 0;border-right:1px solid var(--line);position:relative}.milestone-item:last-child{border:0}.milestone-item:before{content:"";width:13px;height:13px;border-radius:50%;background:var(--violet);border:3px solid var(--paper);position:absolute;top:-8px;left:20px}.milestone-item strong{display:block;font-size:14px;color:var(--violet);margin-bottom:12px}.milestone-item h3{font-size:18px;margin-bottom:8px}.milestone-item p{font-size:13px;color:var(--muted);margin:0}
    .feature-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:18px}.feature-card{border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--line);transition:var(--ease)}.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.feature-card img{height:210px}.feature-card:first-child img{height:280px}.feature-body{padding:20px}.tag{display:inline-block;color:var(--violet);background:#f0edff;border-radius:8px;padding:4px 9px;font-size:11px;font-weight:800;margin-bottom:11px}.feature-card h3{font-size:18px;line-height:1.45;margin:0 0 8px}.feature-card p{font-size:13px;color:var(--muted);margin:0}.date{color:#a0a4b3;font-size:12px;margin-top:14px}
    .trust{background:#fff}.trust-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.trust-item{padding:20px;border:1px solid var(--line);border-radius:18px}.trust-item strong{display:block;font-size:15px;margin-bottom:5px}.trust-item span{font-size:13px;color:var(--muted)}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.accordion-item{border:1px solid var(--line)!important;border-radius:16px!important;overflow:hidden;margin-bottom:12px;background:#fff}.accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:20px}.accordion-button:not(.collapsed){color:var(--violet);background:#fff;box-shadow:none}.accordion-button:focus{box-shadow:0 0 0 3px rgba(116,76,255,.13)}.accordion-body{font-size:14px;color:var(--muted);padding:0 20px 20px}
    .closing{padding:58px 0;background:linear-gradient(120deg,#744cff,#a74cff 55%,#ff5c91);color:#fff}.closing h2{font-size:34px;margin:0 0 10px}.closing p{color:#f0eaff;margin:0;max-width:610px}.closing .btn-primary-custom{background:#fff;color:var(--violet);margin-top:22px}
    footer{background:#10121e;color:#fff;padding:55px 0 25px}.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:35px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.12)}footer .brand-name{color:#fff}footer p,footer a{color:#9da1b2;font-size:13px}footer a{display:block;margin:8px 0}footer a:hover{color:var(--cyan)}footer h4{font-size:14px;margin:4px 0 15px}.copyright{display:flex;justify-content:space-between;gap:15px;padding-top:20px;color:#777d91;font-size:12px}
    :focus-visible{outline:3px solid rgba(38,217,196,.65);outline-offset:3px}
    @media(max-width:992px){.matrix{grid-template-columns:repeat(2,1fr)}.feature-grid{grid-template-columns:1fr 1fr}.feature-card:first-child{grid-column:span 2}.kpi-grid,.trust-row{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}}
    @media(max-width:768px){.navbar{padding:12px 0}.nav-action{display:none}.hero{padding:60px 0}.section-head{display:block}.section-head .text-link{display:inline-block;margin-top:12px}.compare,.faq-grid{grid-template-columns:1fr}.milestone{grid-template-columns:1fr 1fr;gap:20px;border-top:0}.milestone-item{border-right:0;border-top:2px solid #ded9ff;padding-top:20px}.milestone-item:before{top:-8px}.milestone-item:nth-child(3),.milestone-item:nth-child(4){margin-top:10px}.feature-card:first-child img,.feature-card img{height:210px}}
    @media(max-width:520px){h1{font-size:36px}.hero-copy{font-size:15px}.hero-stat{flex:1;min-width:130px}.section-title{font-size:26px}.matrix,.feature-grid,.kpi-grid,.trust-row{grid-template-columns:1fr}.feature-card:first-child{grid-column:auto}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-grid>div:first-child{grid-column:span 2}.copyright{display:block}.copyright span{display:block;margin-top:6px}.milestone{grid-template-columns:1fr}}

/* roulang page: category1 */
:root{--ink:#12151f;--muted:#6e7485;--paper:#f7f8fc;--white:#fff;--violet:#744cff;--cyan:#26d9c4;--pink:#ff5c91;--line:#e8eaf1;--radius:24px;--shadow:0 18px 50px rgba(21,25,45,.09);--ease:all .25s ease}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC",sans-serif;line-height:1.7}a{text-decoration:none;color:inherit}img{display:block;width:100%;object-fit:cover}button{font:inherit;border:0}.container{max-width:1180px}
.site-header{position:sticky;top:0;z-index:20;background:rgba(247,248,252,.9);backdrop-filter:blur(18px);border-bottom:1px solid rgba(232,234,241,.8)}.navbar{padding:16px 0}.brand{display:flex;align-items:center;gap:11px;font-weight:800}.brand-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,var(--violet),var(--pink));display:grid;place-items:center;color:#fff;font-size:15px;box-shadow:0 8px 20px rgba(116,76,255,.25);overflow:hidden;white-space:nowrap}.brand-name{font-size:17px}.nav-link{color:var(--muted)!important;font-size:14px;font-weight:600;margin:0 5px;padding:9px 12px!important;border-radius:10px;transition:var(--ease)}.nav-link:hover,.nav-link.active{color:var(--ink)!important;background:#fff;box-shadow:0 5px 16px rgba(21,25,45,.06)}.nav-action{background:var(--ink);color:#fff;border-radius:12px;padding:10px 17px;font-size:14px;font-weight:700;transition:var(--ease)}.nav-action:hover{background:var(--violet);transform:translateY(-2px)}
.hero{padding:78px 0 70px;background:linear-gradient(125deg,#121525,#202045 57%,#382c70);color:#fff}.eyebrow{display:inline-flex;gap:8px;color:#bdb8ff;font-size:13px;font-weight:700;letter-spacing:.08em;margin-bottom:18px}.eyebrow:before{content:"";width:24px;height:2px;background:var(--cyan);margin-top:12px}.hero h1{font-size:clamp(38px,5vw,68px);line-height:1.15;letter-spacing:-.04em;font-weight:800}.hero h1 em{font-style:normal;color:var(--cyan)}.hero-copy{max-width:650px;color:#c7c9d9;font-size:17px;margin:20px 0 30px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.btn-primary-custom,.btn-light-custom{border-radius:13px;padding:13px 22px;font-weight:700;transition:var(--ease);display:inline-flex;align-items:center;gap:8px}.btn-primary-custom{background:var(--cyan);color:#102029}.btn-primary-custom:hover{background:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(38,217,196,.24)}.btn-light-custom{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#fff}.btn-light-custom:hover{background:#fff;color:var(--ink)}
.hero-stage{background:#fff;border:8px solid rgba(255,255,255,.12);border-radius:28px;box-shadow:0 25px 70px rgba(0,0,0,.22);overflow:hidden;transform:rotate(1deg)}.hero-stage img{height:300px}.stage-bar{padding:13px 16px;background:#171928;color:#fff;display:flex;justify-content:space-between;font-size:12px}.pulse{color:var(--cyan)}
section{padding:76px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:30px}.section-kicker{color:var(--violet);font-size:12px;font-weight:800;letter-spacing:.12em}.section-title{font-size:32px;line-height:1.3;letter-spacing:-.035em;margin:6px 0 0;font-weight:800}.section-desc{max-width:570px;color:var(--muted);font-size:15px;margin:8px 0 0}.text-link{color:var(--violet);font-weight:700;font-size:14px;white-space:nowrap}.text-link:hover{color:var(--pink)}
.intro-band{background:#fff;border-bottom:1px solid var(--line)}.intro-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:45px;align-items:center}.signal-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.signal{padding:18px;border:1px solid var(--line);border-radius:17px;background:var(--paper)}.signal strong{display:block;font-size:24px;color:var(--violet)}.signal span{font-size:13px;color:var(--muted)}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.category-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;min-height:210px;transition:var(--ease)}.category-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#d9d2ff}.category-index{color:var(--pink);font-size:13px;font-weight:800}.category-card h3{font-size:20px;margin:20px 0 8px}.category-card p{font-size:14px;color:var(--muted);margin:0}.category-card a{display:inline-block;margin-top:18px;color:var(--violet);font-size:13px;font-weight:700}
.content-layout{display:grid;grid-template-columns:1.4fr .8fr;gap:22px}.feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.feature-card img{height:300px}.feature-body{padding:24px}.tag{display:inline-block;color:var(--violet);background:#f0edff;border-radius:8px;padding:4px 9px;font-size:11px;font-weight:800;margin-bottom:11px}.feature-body h3{font-size:23px;margin:0 0 8px}.feature-body p{color:var(--muted);font-size:14px;margin:0}.side-list{display:grid;gap:14px}.side-item{background:#fff;border:1px solid var(--line);border-radius:18px;padding:17px;display:flex;gap:15px}.side-item img{width:92px;height:76px;border-radius:12px}.side-item h4{font-size:15px;margin:0 0 5px}.side-item span{font-size:12px;color:var(--muted)}
.dark-section{background:#151827;color:#fff}.dark-section .section-title{color:#fff}.dark-section .section-desc{color:#aeb1c2}.method-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.12);border-radius:22px;overflow:hidden}.method{padding:25px;background:#191c2d}.method b{display:block;color:var(--cyan);font-size:30px}.method h3{font-size:17px;margin:16px 0 7px}.method p{font-size:13px;color:#b8bbca;margin:0}
.rank-layout{display:grid;grid-template-columns:1fr 1fr;gap:22px}.rank-list{background:#fff;border:1px solid var(--line);border-radius:22px;padding:12px 22px}.rank-item{display:grid;grid-template-columns:38px 1fr auto;align-items:center;gap:15px;padding:15px 0;border-bottom:1px solid var(--line)}.rank-item:last-child{border-bottom:0}.rank-no{font-size:20px;font-weight:800;color:var(--violet)}.rank-item strong{font-size:14px}.rank-item small{display:block;color:var(--muted);font-size:12px}.score{color:var(--pink);font-weight:800}
.quote{background:linear-gradient(135deg,#f0edff,#fff);border:1px solid #ddd7ff;border-radius:24px;padding:32px;display:flex;flex-direction:column;justify-content:center}.quote p{font-size:21px;line-height:1.6;font-weight:700;margin:0 0 22px}.quote span{font-size:13px;color:var(--muted)}
.data-strip{background:#fff}.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.data-item{padding:23px;border-left:3px solid var(--cyan)}.data-item strong{font-size:31px;display:block}.data-item span{color:var(--muted);font-size:13px}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.accordion-item{border:1px solid var(--line)!important;border-radius:16px!important;overflow:hidden;margin-bottom:12px;background:#fff}.accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:20px}.accordion-button:not(.collapsed){color:var(--violet);background:#fff;box-shadow:none}.accordion-button:focus{box-shadow:0 0 0 3px rgba(116,76,255,.13)}.accordion-body{font-size:14px;color:var(--muted);padding:0 20px 20px}
.closing{background:linear-gradient(125deg,#744cff,#3b2c86);color:#fff;text-align:center}.closing h2{font-size:36px}.closing p{color:#ddd9ff;max-width:600px;margin:12px auto 22px}.closing .btn-primary-custom{background:#fff;color:var(--violet)}
footer{background:#10121e;color:#fff;padding:58px 0 22px}footer p,footer a{color:#9fa4b8;font-size:13px}footer a{display:block;margin:8px 0}footer a:hover{color:var(--cyan)}footer h4{font-size:14px;margin-bottom:16px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px}.copyright{border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding-top:18px;display:flex;justify-content:space-between;color:#777d92;font-size:12px}
@media(max-width:992px){.nav-link{margin:3px 0}.intro-grid,.content-layout,.rank-layout{grid-template-columns:1fr}.category-grid{grid-template-columns:repeat(2,1fr)}.method-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:2fr 1fr 1fr}}
@media(max-width:768px){section{padding:58px 0}.hero{padding:60px 0}.hero h1{font-size:42px}.section-head{display:block}.section-head .text-link{display:inline-block;margin-top:14px}.data-grid{grid-template-columns:repeat(2,1fr)}.faq-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.brand-name{font-size:15px}}
@media(max-width:520px){.brand-mark{width:34px;height:34px;font-size:12px}.brand-name{font-size:14px}.hero h1{font-size:35px}.hero-copy{font-size:15px}.hero-stage img{height:210px}.category-grid,.method-grid,.data-grid{grid-template-columns:1fr}.signal-list{grid-template-columns:1fr}.feature-card img{height:220px}.footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin-top:6px}}