/* roulang page: index */
:root{
      --blue:#3978d8;--blue-deep:#2459ad;--blue-soft:#eaf2ff;--cyan:#dff5f5;
      --ink:#1d2b42;--muted:#687891;--line:#dbe5f1;--paper:#fff;--wash:#f4f8fc;
      --warm:#fffdf9;--orange:#dd9860;--green:#4a9b78;--red:#b85c66;
      --radius:16px;--radius-sm:10px;--shadow:0 14px 34px rgba(46,86,135,.10);
      --shadow-hover:0 18px 42px rgba(46,86,135,.16);--max:1200px;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;color:var(--ink);background:var(--wash);line-height:1.8;font-size:16px}
    a{color:inherit;text-decoration:none} img{max-width:100%;display:block} button,input{font:inherit}
    button{border:0;cursor:pointer}.container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
    .site-header{background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .nav-wrap{min-height:84px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:16px;white-space:nowrap}
    .brand-name{font-size:25px;font-weight:850;letter-spacing:-1px}.brand-mark{width:10px;height:34px;border-radius:5px;background:var(--blue);display:inline-block}
    .nav-divider{width:1px;height:30px;background:var(--line)}.nav-links{display:flex;align-items:center;gap:6px;flex:1}
    .nav-links a{color:var(--muted);font-size:14px;padding:9px 13px;border-radius:8px;transition:.2s ease}.nav-links a:hover,.nav-links a.active{color:var(--blue-deep);background:var(--blue-soft)}
    .nav-cta{padding:11px 18px;background:var(--blue);color:#fff;border-radius:9px;font-size:14px;font-weight:700;transition:.2s ease}.nav-cta:hover{background:var(--blue-deep);transform:translateY(-1px);box-shadow:0 8px 18px rgba(57,120,216,.22)}
    .menu-btn{display:none;background:var(--blue-soft);color:var(--blue-deep);padding:8px 11px;border-radius:8px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-deep);font-size:13px;font-weight:800;letter-spacing:1px}.eyebrow:before{content:"";width:24px;height:2px;background:var(--blue)}
    .hero{padding:88px 0 62px;background:linear-gradient(120deg,#f7fbff 0%,#edf5ff 58%,#f8fbff 100%);border-bottom:1px solid var(--line)}
    .hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:72px;align-items:center}.hero h1{font-size:clamp(38px,5vw,60px);line-height:1.2;letter-spacing:-2px;margin:18px 0 22px;max-width:660px}.hero h1 span{color:var(--blue)}
    .hero-copy{font-size:17px;color:var(--muted);max-width:610px;line-height:1.95}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.btn{display:inline-flex;justify-content:center;align-items:center;min-height:46px;padding:0 20px;border-radius:9px;font-weight:750;font-size:14px;transition:.2s ease}.btn-primary{background:var(--blue);color:#fff;box-shadow:0 7px 16px rgba(57,120,216,.2)}.btn-primary:hover{background:var(--blue-deep);transform:translateY(-2px);box-shadow:0 12px 24px rgba(57,120,216,.25)}.btn-secondary{color:var(--blue-deep);border:1px solid #b9d0ef;background:#fff}.btn-secondary:hover{border-color:var(--blue);background:var(--blue-soft);transform:translateY(-1px)}
    .hero-index{background:var(--paper);border:1px solid var(--line);border-radius:22px;padding:25px;box-shadow:var(--shadow);position:relative;overflow:hidden}.hero-index:after{content:"";position:absolute;width:150px;height:150px;border-radius:50%;right:-65px;top:-70px;background:var(--cyan)}
    .index-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:17px;position:relative;z-index:1}.index-head strong{font-size:18px}.mini-status{color:var(--green);font-size:12px;background:#edf8f3;padding:4px 9px;border-radius:99px}.index-row{display:flex;align-items:center;gap:14px;padding:17px 0;border-bottom:1px dashed var(--line)}.index-no{color:var(--blue);font-weight:850;font-size:13px;width:28px}.index-row div{flex:1}.index-row b{display:block;font-size:15px}.index-row small{color:var(--muted);font-size:13px}.index-arrow{color:#8da6c7;font-size:20px}.filter-demo{margin-top:19px;padding:13px 15px;border-radius:10px;background:var(--blue-soft);color:var(--blue-deep);font-size:13px;display:flex;justify-content:space-between}.meta-strip{margin-top:52px;padding-top:17px;border-top:1px solid #cbdced;display:flex;gap:30px;color:var(--muted);font-size:13px;flex-wrap:wrap}.meta-strip b{color:var(--ink);margin-right:5px}
    .section{padding:100px 0}.section.alt{background:var(--warm)}.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:42px}.section h2{font-size:clamp(28px,3.5vw,40px);line-height:1.3;letter-spacing:-1px;margin-top:12px}.section-intro{color:var(--muted);max-width:550px;line-height:1.9}
    .feature-layout{display:grid;grid-template-columns:230px 1fr;gap:48px}.feature-menu{border-right:1px solid var(--line);padding-right:22px}.feature-menu a{display:block;padding:14px 15px;color:var(--muted);border-radius:9px;margin-bottom:7px;transition:.2s}.feature-menu a:hover,.feature-menu a.active{color:var(--blue-deep);background:var(--blue-soft);font-weight:750}.feature-menu a.active{border-left:3px solid var(--blue)}
    .feature-main{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}.feature-card,.info-card,.case-main,.price-card,.faq-item{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);transition:.25s ease}.feature-card:hover,.info-card:hover,.case-main:hover,.price-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#b8d0ef}.feature-card{padding:28px;min-height:235px}.feature-card.large{grid-row:span 2;background:#f9fcff}.feature-card h3{font-size:22px;margin:14px 0 8px}.feature-card p{color:var(--muted);font-size:14px}.feature-tag,.label{display:inline-block;font-size:12px;color:var(--blue-deep);background:var(--blue-soft);padding:4px 9px;border-radius:5px;font-weight:750}.feature-card .card-link{display:inline-block;color:var(--blue);font-weight:750;font-size:13px;margin-top:18px}.icon-box{width:42px;height:42px;display:grid;place-items:center;background:#e8f3ff;border-radius:11px;color:var(--blue);font-weight:900}
    .path-list{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}.path-item{padding:27px 28px 24px 0;position:relative}.path-item:not(:last-child){border-right:1px solid var(--line);padding-right:30px;margin-right:30px}.path-no{color:var(--blue);font-size:13px;font-weight:850}.path-item h3{font-size:20px;margin:9px 0}.path-item p{color:var(--muted);font-size:14px}.path-item:after{content:"→";position:absolute;right:12px;top:50px;color:#a8bdd9;font-size:25px}.path-item:last-child:after{display:none}
    .case-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:22px}.case-index{display:flex;flex-direction:column;gap:9px}.case-index a{padding:18px;background:#f7faff;border:1px solid var(--line);border-radius:10px;color:var(--muted);font-size:14px}.case-index a:hover,.case-index a.active{background:var(--blue-soft);color:var(--blue-deep);border-color:#b9d0ef}.case-main{padding:34px}.case-main .label{background:#fff1e7;color:#9a5b2d}.case-main h3{font-size:26px;margin:17px 0 10px}.case-main p{color:var(--muted);max-width:680px}.case-route{display:flex;align-items:center;gap:12px;margin:27px 0;padding:18px;background:#f7faff;border-radius:10px;flex-wrap:wrap}.case-route span{padding:7px 11px;background:#fff;border:1px solid var(--line);border-radius:7px;font-size:13px}.case-route i{font-style:normal;color:var(--blue)}
    .price-wrap{display:grid;grid-template-columns:1fr .8fr;gap:22px;align-items:stretch}.price-card{padding:34px}.price-card h3{font-size:25px;margin-bottom:10px}.price-note{color:var(--muted);font-size:14px}.price-state{display:flex;align-items:baseline;gap:10px;margin:23px 0;color:var(--blue-deep)}.price-state strong{font-size:34px}.rules{list-style:none;border-top:1px solid var(--line);margin-top:20px}.rules li{padding:13px 0;border-bottom:1px dashed var(--line);color:var(--muted);font-size:14px}.rules li:before{content:"✓";color:var(--green);font-weight:900;margin-right:10px}.price-side{background:#edf5ff;border:1px solid #d5e5f8;border-radius:var(--radius);padding:30px}.price-side h3{font-size:20px;margin-bottom:11px}.price-side p{color:var(--muted);font-size:14px}.price-side .btn{margin-top:22px}
    .faq-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:45px}.faq-grid>div>p{color:var(--muted);margin-top:15px}.faq-list{display:flex;flex-direction:column;gap:10px}.faq-item{box-shadow:none;padding:19px 22px}.faq-item summary{cursor:pointer;font-weight:750;list-style:none;display:flex;justify-content:space-between;gap:20px}.faq-item summary:after{content:"+";color:var(--blue);font-size:21px;line-height:1}.faq-item[open] summary:after{content:"−"}.faq-item p{color:var(--muted);font-size:14px;padding-top:12px;max-width:700px}
    .cta{padding:70px 0;background:#e7f1ff}.cta-box{display:flex;justify-content:space-between;align-items:center;gap:30px}.cta h2{font-size:32px;line-height:1.35;margin:12px 0}.cta p{color:var(--muted)}.footer{background:#f8fbfe;border-top:1px solid var(--line);padding:43px 0 24px}.footer-grid{display:grid;grid-template-columns:1.2fr 1fr .8fr;gap:45px;padding-bottom:35px}.footer-brand{font-size:20px;font-weight:850;margin-bottom:10px}.footer p,.footer a{font-size:13px;color:var(--muted)}.footer h4{font-size:14px;margin-bottom:13px}.footer-links{display:flex;flex-wrap:wrap;gap:9px 20px}.footer a:hover{color:var(--blue)}.copyright{border-top:1px solid var(--line);padding-top:20px;color:#8190a5;font-size:12px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
    :focus-visible{outline:3px solid rgba(57,120,216,.38);outline-offset:3px}.muted-box{background:#f5f7fa;color:#8692a4;border:1px dashed #cbd5e2;padding:11px 13px;border-radius:8px;font-size:13px}.error-box{background:#fff1f2;color:var(--red);padding:11px 13px;border-radius:8px;font-size:13px}.disabled{opacity:.48;pointer-events:none}
    @media(max-width:960px){.hero-grid{gap:35px}.feature-layout{grid-template-columns:190px 1fr}.feature-main{grid-template-columns:1fr}.feature-card.large{grid-row:auto}.footer-grid{grid-template-columns:1fr 1fr}.price-wrap{grid-template-columns:1fr}.faq-grid{grid-template-columns:1fr}}
    @media(max-width:768px){.container{width:min(100% - 36px,var(--max))}.nav-wrap{min-height:72px}.menu-btn{display:block;margin-left:auto}.nav-cta{display:none}.nav-links{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:12px 18px;flex-direction:column;align-items:stretch;box-shadow:var(--shadow)}.nav-links.open{display:flex}.nav-links a{padding:11px 13px}.nav-divider{display:none}.brand-name{font-size:20px}.hero{padding:58px 0 42px}.hero-grid{grid-template-columns:1fr}.hero h1{font-size:38px}.section{padding:68px 0}.section-head{display:block;margin-bottom:29px}.section-intro{margin-top:15px}.feature-layout{grid-template-columns:1fr;gap:22px}.feature-menu{border-right:0;border-bottom:1px solid var(--line);padding:0 0 12px;display:flex;gap:6px;overflow:auto}.feature-menu a{white-space:nowrap;margin:0}.path-list{grid-template-columns:1fr}.path-item,.path-item:not(:last-child){border-right:0;border-bottom:1px solid var(--line);padding:22px 35px 22px 0;margin:0}.path-item:after{right:5px;top:35px;transform:rotate(90deg)}.case-layout{grid-template-columns:1fr}.cta-box{display:block}.cta .actions{margin-top:20px}.footer-grid{grid-template-columns:1fr;gap:25px}}
    @media(max-width:520px){.container{width:calc(100% - 36px)}.hero h1{font-size:32px;letter-spacing:-1px}.hero-copy{font-size:15px}.actions .btn{width:100%}.meta-strip{gap:10px 18px}.hero-index{padding:19px}.section h2{font-size:29px}.feature-card,.case-main,.price-card{padding:23px}.case-main h3{font-size:22px}.copyright{display:block}.copyright span{display:block;margin-top:7px}}

/* roulang page: category1 */
:root{--blue:#3978d8;--deep:#2459ad;--soft:#eaf2ff;--cyan:#dff5f5;--ink:#1d2b42;--muted:#687891;--line:#dbe5f1;--paper:#fff;--wash:#f4f8fc;--warm:#fffdf9;--orange:#dd9860;--green:#4a9b78;--red:#b85c66;--r:16px;--rs:10px;--shadow:0 14px 34px rgba(46,86,135,.10);--hover:0 18px 42px rgba(46,86,135,.16);--max:1200px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--wash);color:var(--ink);font:16px/1.8 "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{border:0;cursor:pointer}img{display:block;max-width:100%}.container{width:min(var(--max),calc(100% - 48px));margin:auto}.site-header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.nav-wrap{min-height:84px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:16px;white-space:nowrap}.brand-mark{width:10px;height:34px;border-radius:5px;background:var(--blue)}.brand-name{font-size:25px;font-weight:850;letter-spacing:-1px}.nav-divider{width:1px;height:30px;background:var(--line)}.nav-links{display:flex;align-items:center;gap:6px;flex:1}.nav-links a{padding:9px 13px;border-radius:8px;color:var(--muted);font-size:14px;transition:.2s}.nav-links a:hover,.nav-links a.active{background:var(--soft);color:var(--deep)}.nav-cta,.btn-primary{display:inline-flex;align-items:center;justify-content:center;background:var(--blue);color:#fff;border-radius:9px;font-weight:750;transition:.2s}.nav-cta{padding:11px 18px;font-size:14px}.nav-cta:hover,.btn-primary:hover{background:var(--deep);transform:translateY(-2px);box-shadow:0 12px 24px rgba(57,120,216,.24)}.menu-btn{display:none;background:var(--soft);color:var(--deep);padding:8px 11px;border-radius:8px}.hero{padding:76px 0 58px;background:linear-gradient(120deg,#f7fbff,#edf5ff 58%,#f8fbff);border-bottom:1px solid var(--line)}.crumbs{font-size:13px;color:var(--muted);margin-bottom:26px}.crumbs a{color:var(--blue-deep)}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--deep);font-size:13px;font-weight:800;letter-spacing:1px}.eyebrow:before{content:"";width:24px;height:2px;background:var(--blue)}h1{font-size:clamp(36px,5vw,58px);line-height:1.22;letter-spacing:-2px;margin:18px 0}.hero h1 span{color:var(--blue)}.lead{max-width:630px;color:var(--muted);font-size:17px;line-height:1.95}.actions{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}.btn{min-height:46px;padding:0 20px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:750}.btn-secondary{border:1px solid #b9d0ef;background:#fff;color:var(--deep);transition:.2s}.btn-secondary:hover{background:var(--soft);border-color:var(--blue);transform:translateY(-1px)}.index-panel{background:var(--paper);padding:26px;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);position:relative;overflow:hidden}.index-panel:after{content:"";position:absolute;right:-65px;top:-65px;width:155px;height:155px;border-radius:50%;background:var(--cyan)}.panel-top{display:flex;justify-content:space-between;align-items:center;position:relative;z-index:1}.panel-top strong{font-size:18px}.status{font-size:12px;color:var(--green);background:#e9f6f0;border-radius:99px;padding:3px 9px}.index-row{display:flex;gap:14px;align-items:center;padding:17px 0;border-bottom:1px dashed var(--line);position:relative;z-index:1}.index-row:last-child{border:0}.index-num{color:var(--blue);font-weight:850;font-size:14px}.index-row div{flex:1}.index-row b{display:block;font-size:15px}.index-row small{color:var(--muted);font-size:13px}.arrow{font-size:20px;color:#8da6c7}.meta-strip{display:flex;gap:28px;flex-wrap:wrap;margin-top:48px;padding-top:17px;border-top:1px solid #cbdced;color:var(--muted);font-size:13px}.meta-strip b{color:var(--ink);margin-right:5px}.section{padding:94px 0}.section.alt{background:var(--warm)}.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:38px}.section h2{font-size:clamp(28px,3.5vw,40px);line-height:1.3;letter-spacing:-1px;margin:12px 0 0}.intro{max-width:530px;color:var(--muted)}.filter-box{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:25px}.filter-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr auto;gap:12px;align-items:end}.field label{display:block;color:var(--muted);font-size:12px;margin:0 0 6px}.field input,.field select{width:100%;height:44px;border:1px solid #cbd9e9;border-radius:9px;background:#fff;color:var(--ink);padding:0 12px;outline:0}.field input:focus,.field select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(57,120,216,.15)}.filter-button{height:44px;padding:0 18px;background:var(--blue);color:#fff;border-radius:9px;font-weight:750}.filter-button:hover{background:var(--deep)}.filter-note{margin:16px 0 0;color:var(--muted);font-size:13px}.content-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;margin-top:24px}.wide-card,.list-card,.faq-item,.cta-box{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}.wide-card{padding:30px;min-height:280px;transition:.25s}.wide-card:hover,.list-card:hover{box-shadow:var(--hover);transform:translateY(-3px);border-color:#b8d0ef}.label{display:inline-block;font-size:12px;color:var(--deep);background:var(--soft);border-radius:5px;padding:3px 9px;font-weight:750}.wide-card h3{font-size:25px;margin:18px 0 10px}.wide-card p,.list-card p{color:var(--muted);font-size:14px}.card-foot{display:flex;justify-content:space-between;align-items:center;margin-top:28px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.card-link{color:var(--blue);font-weight:750}.list-stack{display:grid;gap:12px}.list-card{padding:19px 21px;display:flex;align-items:center;gap:16px;transition:.25s}.list-card .list-content{flex:1}.list-card h3{font-size:17px;margin:5px 0 2px}.list-card p{margin:0;line-height:1.6}.list-arrow{color:#9ab1cf;font-size:21px}.steps{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}.step{padding:28px 28px 18px 0;position:relative}.step:not(:last-child){border-right:1px solid var(--line);margin-right:30px;padding-right:30px}.step-no{font-size:13px;color:var(--blue);font-weight:850}.step h3{font-size:20px;margin:9px 0}.step p{margin:0;color:var(--muted);font-size:14px}.step:not(:last-child):after{content:"→";position:absolute;right:10px;top:50px;color:#a8bdd9;font-size:25px}.demo-grid{display:grid;grid-template-columns:240px 1fr;gap:28px}.demo-nav{display:grid;align-content:start;gap:8px}.demo-nav a{padding:14px 16px;border:1px solid var(--line);border-radius:9px;background:#f7faff;color:var(--muted);font-size:14px}.demo-nav a:hover,.demo-nav a.active{background:var(--soft);border-color:#b9d0ef;color:var(--deep)}.demo-card{padding:32px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}.demo-card h3{font-size:25px;margin:15px 0 8px}.demo-card p{color:var(--muted);max-width:690px}.notice{margin-top:22px;padding:14px 16px;border-left:3px solid var(--orange);background:#fff8f1;color:#765438;font-size:13px}.empty{margin-top:24px;padding:22px;border:1px dashed #b8c9dc;border-radius:var(--r);color:var(--muted);text-align:center;background:#fbfdff}.price-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px}.price-card{padding:31px;background:#f9fcff}.price-card h3{font-size:25px;margin:15px 0 8px}.price-card p{color:var(--muted)}.rule-list{margin:20px 0 0;padding:0;list-style:none}.rule-list li{padding:10px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:14px}.rule-list li:before{content:"✓";color:var(--green);font-weight:850;margin-right:9px}.faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:42px}.faq-items{display:grid;gap:11px}.faq-item{padding:18px 21px}.faq-item summary{font-weight:750;cursor:pointer;list-style:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";float:right;color:var(--blue);font-size:20px}.faq-item[open] summary:after{content:"−"}.faq-item p{color:var(--muted);font-size:14px;margin:12px 0 0}.cta-box{padding:42px;text-align:center;background:#eaf3ff;border-color:#c9ddf5}.cta-box h2{margin:0 0 10px}.cta-box p{color:var(--muted);margin:0 auto 22px;max-width:650px}.footer{padding:55px 0 24px;background:#f0f5fa;border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:45px}.footer-brand{font-size:22px;font-weight:850}.footer p{color:var(--muted);font-size:13px;line-height:1.8}.footer h4{margin:0 0 12px;font-size:15px}.footer-links{display:grid;gap:7px;color:var(--muted);font-size:13px}.footer-links a:hover{color:var(--blue)}.copyright{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:35px;padding-top:18px;color:#8291a5;font-size:12px}@media(max-width:1024px){.hero-grid{gap:35px}.filter-grid{grid-template-columns:1fr 1fr 1fr}.filter-grid .field:first-child{grid-column:span 2}.content-layout,.price-grid{grid-template-columns:1fr}.demo-grid{grid-template-columns:190px 1fr}}@media(max-width:768px){.container{width:min(100% - 36px,var(--max))}.nav-wrap{min-height:70px;gap:14px}.brand{gap:10px}.brand-name{font-size:20px}.nav-divider,.nav-cta{display:none}.menu-btn{display:block;margin-left:auto}.nav-links{display:none;position:absolute;left:18px;right:18px;top:70px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav-links.open{display:flex}.hero{padding:55px 0 42px}.hero-grid,.feature-layout,.faq-grid,.demo-grid{grid-template-columns:1fr}.hero h1{font-size:36px}.section{padding:65px 0}.section-head{display:block}.section-head .intro{margin-top:14px}.filter-grid{grid-template-columns:1fr}.filter-grid .field:first-child{grid-column:auto}.filter-button{width:100%}.steps{grid-template-columns:1fr}.step{padding:22px 0;border-bottom:1px solid var(--line)}.step:not(:last-child){border-right:0;margin:0;padding-right:0}.step:not(:last-child):after{content:"↓";right:10px;top:auto;bottom:-18px;z-index:1}.footer-grid{grid-template-columns:1fr;gap:25px}.path-item{padding-right:0}.meta-strip{gap:14px}}@media(max-width:520px){.hero h1{font-size:31px;letter-spacing:-1px}.lead{font-size:15px}.actions .btn{width:100%}.index-panel,.wide-card,.demo-card,.price-card,.cta-box{padding:22px}.list-card{align-items:flex-start}.copyright{display:block}.copyright span{display:block;margin-top:5px}}
:focus-visible{outline:3px solid rgba(57,120,216,.4);outline-offset:3px}.is-disabled{opacity:.55;pointer-events:none}

/* roulang page: category2 */
:root{--blue:#3978d8;--blue-deep:#2459ad;--blue-soft:#eaf2ff;--cyan:#dff5f5;--ink:#1d2b42;--muted:#687891;--line:#dbe5f1;--paper:#fff;--wash:#f4f8fc;--warm:#fffdf9;--orange:#dd9860;--green:#4a9b78;--red:#b85c66;--radius:16px;--radius-sm:10px;--shadow:0 14px 34px rgba(46,86,135,.10);--shadow-hover:0 18px 42px rgba(46,86,135,.16);--max:1200px}
*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;color:var(--ink);background:var(--wash);line-height:1.8;font-size:16px}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{border:0;cursor:pointer}img{max-width:100%;display:block}.container{width:min(var(--max),calc(100% - 48px));margin:0 auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.nav-wrap{min-height:84px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:16px;white-space:nowrap}.brand-name{font-size:25px;font-weight:850;letter-spacing:-1px}.brand-mark{width:10px;height:34px;border-radius:5px;background:var(--blue);display:inline-block}.nav-divider{width:1px;height:30px;background:var(--line)}.nav-links{display:flex;align-items:center;gap:6px;flex:1}.nav-links a{color:var(--muted);font-size:14px;padding:9px 13px;border-radius:8px;transition:.2s ease}.nav-links a:hover,.nav-links a.active{color:var(--blue-deep);background:var(--blue-soft)}.nav-cta{padding:11px 18px;background:var(--blue);color:#fff;border-radius:9px;font-size:14px;font-weight:700;transition:.2s ease}.nav-cta:hover{background:var(--blue-deep);transform:translateY(-1px);box-shadow:0 8px 18px rgba(57,120,216,.22)}.menu-btn{display:none;background:var(--blue-soft);color:var(--blue-deep);padding:8px 11px;border-radius:8px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-deep);font-size:13px;font-weight:800;letter-spacing:1px}.eyebrow:before{content:"";width:24px;height:2px;background:var(--blue)}
.hero{padding:76px 0 48px;background:linear-gradient(120deg,#f7fbff,#edf5ff 58%,#f8fbff);border-bottom:1px solid var(--line)}.crumbs{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:28px}.crumbs a:hover{color:var(--blue)}.hero-grid{display:grid;grid-template-columns:1fr .9fr;gap:72px;align-items:center}.hero h1{font-size:clamp(36px,5vw,58px);line-height:1.2;letter-spacing:-2px;margin:18px 0 20px}.hero h1 span{color:var(--blue)}.hero-copy{font-size:17px;color:var(--muted);max-width:640px;line-height:1.95}.hero-actions{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}.btn{display:inline-flex;justify-content:center;align-items:center;min-height:46px;padding:0 20px;border-radius:9px;font-weight:750;font-size:14px;transition:.2s ease}.btn-primary{background:var(--blue);color:#fff;box-shadow:0 7px 16px rgba(57,120,216,.2)}.btn-primary:hover{background:var(--blue-deep);transform:translateY(-2px);box-shadow:0 12px 24px rgba(57,120,216,.25)}.btn-secondary{color:var(--blue-deep);border:1px solid #b9d0ef;background:#fff}.btn-secondary:hover{border-color:var(--blue);background:var(--blue-soft);transform:translateY(-1px)}.hero-panel{background:var(--paper);border:1px solid var(--line);border-radius:22px;padding:25px;box-shadow:var(--shadow);position:relative;overflow:hidden}.hero-panel:after{content:"";position:absolute;width:150px;height:150px;border-radius:50%;right:-65px;top:-70px;background:var(--cyan)}.panel-top{display:flex;justify-content:space-between;align-items:center;position:relative;z-index:1}.panel-top strong{font-size:17px}.status{font-size:12px;color:var(--green);background:#e9f7f0;padding:4px 9px;border-radius:5px}.filter-line{padding:17px 0;border-bottom:1px dashed var(--line);display:flex;gap:13px;align-items:center;position:relative;z-index:1}.filter-line:last-child{border-bottom:0}.filter-icon{width:34px;height:34px;border-radius:9px;background:var(--blue-soft);color:var(--blue-deep);display:grid;place-items:center;font-weight:800}.filter-line div{flex:1}.filter-line b{display:block;font-size:14px}.filter-line small{font-size:12px;color:var(--muted)}.panel-arrow{color:#8da6c7;font-size:20px}.meta-strip{margin-top:42px;padding-top:16px;border-top:1px solid #cbdced;display:flex;gap:28px;flex-wrap:wrap;color:var(--muted);font-size:13px}.meta-strip b{color:var(--ink);margin-right:5px}
.section{padding:92px 0}.section.alt{background:var(--warm)}.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:38px}.section h2{font-size:clamp(28px,3.5vw,40px);line-height:1.3;letter-spacing:-1px;margin-top:12px}.section-intro{color:var(--muted);max-width:560px;line-height:1.9}.filter-shell{display:grid;grid-template-columns:250px 1fr;gap:34px;align-items:start}.filter-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);position:sticky;top:110px}.filter-box h3{font-size:18px;margin-bottom:16px}.field{margin-bottom:15px}.field label{display:block;font-size:13px;font-weight:750;margin-bottom:6px}.field input,.field select{width:100%;height:42px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--ink);padding:0 11px;outline:0}.field input:focus,.field select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(57,120,216,.14)}.filter-submit{width:100%;margin-top:5px}.filter-note{font-size:12px;color:var(--muted);margin-top:14px;line-height:1.7}.result-area{min-width:0}.result-bar{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:18px;padding-bottom:15px;border-bottom:1px solid var(--line)}.result-bar strong{font-size:18px}.result-bar span{font-size:13px;color:var(--muted)}.result-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}.content-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow);transition:.25s ease;min-height:220px}.content-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#b8d0ef}.content-card.wide{grid-row:span 2;min-height:458px;background:#f9fcff}.card-head{display:flex;justify-content:space-between;gap:12px;align-items:center}.label{display:inline-block;font-size:12px;color:var(--blue-deep);background:var(--blue-soft);padding:4px 9px;border-radius:5px;font-weight:750}.label.orange{background:#fff1e7;color:#9a5b2d}.label.green{background:#e9f7f0;color:#397c60}.content-card h3{font-size:21px;line-height:1.45;margin:18px 0 9px}.content-card p{color:var(--muted);font-size:14px;line-height:1.85}.card-foot{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);margin-top:24px;padding-top:14px;color:var(--muted);font-size:12px}.card-link{color:var(--blue-deep);font-weight:750}.card-link:hover{text-decoration:underline}.placeholder-visual{height:170px;border-radius:12px;margin-bottom:21px;background:linear-gradient(135deg,#e9f2ff,#f7fbff);border:1px solid #d6e5f6;position:relative;overflow:hidden}.placeholder-visual:before,.placeholder-visual:after{content:"";position:absolute;border:1px solid #bdd5f1;border-radius:50%}.placeholder-visual:before{width:210px;height:210px;right:-50px;top:-90px}.placeholder-visual:after{width:110px;height:110px;left:26px;bottom:-65px}.visual-caption{position:absolute;left:18px;bottom:15px;color:var(--blue-deep);font-size:13px;font-weight:800}.pagination{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:30px}.pagination a,.pagination span{min-width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--muted);font-size:13px}.pagination a:hover,.pagination span.current{background:var(--blue-soft);border-color:#b9d0ef;color:var(--blue-deep);font-weight:750}.pagination span.disabled{opacity:.45;cursor:not-allowed}
.topic-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:start}.topic-list{border-top:1px solid var(--line)}.topic-row{display:flex;gap:20px;padding:20px 0;border-bottom:1px solid var(--line);align-items:flex-start}.topic-num{font-size:13px;color:var(--blue);font-weight:800;min-width:30px}.topic-row h3{font-size:17px;margin-bottom:4px}.topic-row p{color:var(--muted);font-size:14px}.notice-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}.notice-card h3{font-size:23px;margin-bottom:12px}.notice-card p{color:var(--muted);font-size:15px}.notice-list{display:grid;gap:12px;margin-top:22px}.notice-list li{list-style:none;background:var(--blue-soft);border-radius:9px;padding:10px 13px;color:var(--blue-deep);font-size:13px}.faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:48px}.faq-item{padding:19px 22px;margin-bottom:12px;box-shadow:none}.faq-item summary{cursor:pointer;font-weight:750;list-style:none;position:relative;padding-right:25px}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";position:absolute;right:0;color:var(--blue);font-size:20px;line-height:1}.faq-item[open] summary:after{content:"−"}.faq-item p{color:var(--muted);font-size:14px;margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}.cta{padding:64px 0;background:#eaf3ff;border-top:1px solid #d6e7f8;border-bottom:1px solid #d6e7f8}.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:28px}.cta h2{font-size:clamp(27px,4vw,40px);margin:10px 0}.cta p{color:var(--muted);max-width:650px}.footer{padding:54px 0 22px;background:#f0f5fa;border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:50px}.footer-brand{font-size:20px;font-weight:850;margin-bottom:9px}.footer p{color:var(--muted);font-size:13px;line-height:1.9}.footer h4{font-size:14px;margin-bottom:13px}.footer-links{display:flex;flex-wrap:wrap;gap:9px 17px}.footer-links a{font-size:13px;color:var(--muted)}.footer-links a:hover{color:var(--blue-deep)}.copyright{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);margin-top:38px;padding-top:17px;color:#8493a8;font-size:12px}
:focus-visible{outline:3px solid rgba(57,120,216,.38);outline-offset:3px}.empty{margin-top:18px;padding:20px;border:1px dashed #b9cce2;border-radius:10px;background:#fbfdff;color:var(--muted);font-size:14px}.error-note{display:none;color:var(--red);font-size:12px;margin-top:8px}.loading-bar{height:6px;border-radius:4px;background:#edf2f7;overflow:hidden;margin-top:16px}.loading-bar i{display:block;width:42%;height:100%;background:#cfe0f6;border-radius:4px}.disabled{opacity:.5;pointer-events:none}
@media(max-width:960px){.hero-grid{gap:36px}.filter-shell{grid-template-columns:210px 1fr}.result-grid{grid-template-columns:1fr}.content-card.wide{grid-row:auto;min-height:250px}.topic-layout{gap:32px}.footer-grid{gap:25px}}
@media(max-width:768px){.container{width:min(var(--max),calc(100% - 36px))}.nav-wrap{min-height:70px;gap:14px}.brand{gap:10px}.brand-name{font-size:20px}.brand-mark{height:28px}.nav-divider,.nav-links,.nav-cta{display:none}.menu-btn{display:block;margin-left:auto}.nav-links.open{display:flex;position:absolute;left:18px;right:18px;top:70px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav-links.open a{padding:12px}.hero{padding:53px 0 38px}.hero-grid,.filter-shell,.topic-layout,.faq-grid{grid-template-columns:1fr}.hero h1{font-size:36px;letter-spacing:-1px}.hero-panel{margin-top:5px}.filter-box{position:static}.section{padding:65px 0}.section-head{display:block;margin-bottom:28px}.section-intro{margin-top:14px}.result-grid{grid-template-columns:1fr}.path-list{grid-template-columns:1fr}.path-item,.path-item:not(:last-child){border-right:0;border-bottom:1px solid var(--line);padding:20px 0;margin:0}.path-item:last-child{border-bottom:0}.path-item:after{display:none}.cta-inner{display:block}.cta-inner .btn{margin-top:22px}.footer-grid{grid-template-columns:1fr;gap:25px}.copyright{display:block}.copyright span{display:block;margin-top:5px}}
@media(max-width:520px){.hero h1{font-size:31px}.hero-copy{font-size:15px}.hero-actions .btn{width:100%}.section h2{font-size:28px}.content-card,.content-card.wide,.notice-card{padding:21px}.placeholder-visual{height:135px}.result-bar{display:block}.result-bar span{display:block;margin-top:5px}.pagination a,.pagination span{min-width:33px;height:33px}.meta-strip{gap:11px 18px}}