/* roulang page: index */
:root{
      --bg:#071321;
      --bg-deep:#050d18;
      --panel:#0d2032;
      --panel-soft:rgba(17,42,64,.72);
      --panel-light:rgba(24,62,88,.72);
      --line:rgba(142,207,236,.18);
      --line-strong:rgba(91,205,244,.42);
      --text:#edf8ff;
      --muted:#a7c0cf;
      --weak:#718b9b;
      --blue:#5bcdf2;
      --cyan:#8de9da;
      --violet:#9c9cf8;
      --good:#8de0bd;
      --warn:#f6c978;
      --radius:18px;
      --radius-sm:12px;
      --shadow:0 22px 70px rgba(0,0,0,.28);
      --glow:0 0 28px rgba(91,205,244,.25);
      --container:1180px;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{
      min-width:320px;
      background:
        radial-gradient(circle at 76% 10%,rgba(50,132,184,.17),transparent 27rem),
        radial-gradient(circle at 8% 42%,rgba(87,87,168,.11),transparent 24rem),
        var(--bg);
      color:var(--text);
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
      font-size:16px;line-height:1.7;
      -webkit-font-smoothing:antialiased;
    }
    body:before{
      content:"";position:fixed;inset:0;pointer-events:none;opacity:.18;
      background-image:linear-gradient(rgba(129,200,225,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(129,200,225,.06) 1px,transparent 1px);
      background-size:42px 42px;mask-image:linear-gradient(to bottom,black,transparent 75%);
    }
    a{color:inherit;text-decoration:none}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:20;
      border-bottom:1px solid var(--line);
      background:rgba(5,15,27,.82);
      backdrop-filter:blur(18px);
    }
    .toolbar{height:76px;display:flex;align-items:center;gap:26px}
    .brand{display:flex;align-items:center;gap:11px;min-width:238px;font-weight:800;letter-spacing:0}
    .brand-mark{width:35px;height:35px;border-radius:11px;display:grid;place-items:center;color:#062031;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:var(--glow);font-weight:900}
    .brand-name{font-size:16px;white-space:nowrap}
    .nav-links{display:flex;align-items:center;gap:5px;flex:1}
    .nav-links a{padding:9px 13px;border-radius:10px;color:var(--muted);font-size:14px;transition:.2s ease}
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(91,205,244,.11)}
    .nav-links a.active{box-shadow:inset 0 -2px var(--blue)}
    .toolbar-side{display:flex;align-items:center;gap:15px;white-space:nowrap}
    .status{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px}
    .status i{width:8px;height:8px;border-radius:50%;background:var(--good);box-shadow:0 0 12px var(--good)}
    .btn{min-height:42px;padding:9px 17px;border:1px solid transparent;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:14px;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s}
    .btn:hover{transform:translateY(-2px)}
    .btn:active{transform:translateY(0)}
    .btn:focus-visible,.nav-links a:focus-visible,.menu-toggle:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid rgba(141,233,218,.55);outline-offset:3px}
    .btn-primary{color:#042033;background:linear-gradient(120deg,var(--blue),var(--cyan));box-shadow:0 0 24px rgba(91,205,244,.3)}
    .btn-primary:hover{box-shadow:0 0 32px rgba(91,205,244,.5)}
    .btn-secondary{color:var(--text);background:var(--panel-light);border-color:var(--line-strong)}
    .btn-ghost{color:var(--muted);background:transparent;border-color:var(--line)}
    .menu-toggle{display:none;border:1px solid var(--line);background:transparent;color:var(--text);width:42px;height:42px;border-radius:10px}
    .hero{padding:76px 0 64px}
    .hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:64px;align-items:center}
    .eyebrow,.kicker{display:inline-flex;align-items:center;gap:8px;color:var(--cyan);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before{content:"";width:22px;height:1px;background:var(--cyan)}
    h1{font-size:clamp(38px,5vw,64px);line-height:1.14;letter-spacing:0;margin:19px 0 22px;max-width:680px}
    .hero-copy{max-width:620px;color:var(--muted);font-size:17px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:30px 0 28px}
    .hero-points{display:flex;gap:24px;flex-wrap:wrap;color:var(--weak);font-size:13px}
    .hero-points strong{display:block;color:var(--text);font-size:19px;line-height:1.2}
    .hero-stage{position:relative;min-height:390px;padding:25px;border:1px solid var(--line);border-radius:26px;background:linear-gradient(145deg,rgba(22,58,81,.82),rgba(8,25,42,.78));box-shadow:var(--shadow);overflow:hidden}
    .stage-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:18px}
    .stage-title{font-weight:800}.stage-state{font-size:12px;color:var(--good);padding:5px 9px;border-radius:20px;background:rgba(141,224,189,.1)}
    .stage-main{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:25px}
    .stage-block{padding:20px;border:1px solid var(--line);border-radius:15px;background:rgba(5,20,34,.55)}
    .stage-block.large{grid-column:span 2;display:flex;align-items:end;justify-content:space-between;min-height:145px;background:linear-gradient(150deg,rgba(34,87,113,.5),rgba(12,34,56,.55))}
    .stage-block small{display:block;color:var(--weak);font-size:12px;margin-bottom:9px}
    .stage-block strong{font-size:22px}.stage-line{height:7px;background:#17384d;border-radius:20px;margin-top:14px;overflow:hidden}.stage-line i{display:block;width:78%;height:100%;background:linear-gradient(90deg,var(--blue),var(--cyan));border-radius:inherit}
    .floating{position:absolute;padding:12px 14px;border:1px solid var(--line-strong);border-radius:13px;background:rgba(11,33,51,.9);box-shadow:var(--shadow);font-size:12px}
    .float-a{top:92px;right:-14px;color:var(--cyan)}.float-b{bottom:22px;left:-15px;color:var(--muted)}
    section{padding:76px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
    .section-head h2{font-size:34px;line-height:1.25;margin-top:9px}
    .section-head p{max-width:520px;color:var(--muted);font-size:15px}
    .feature-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:18px}
    .card{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel-soft);box-shadow:0 12px 38px rgba(0,0,0,.16);transition:.25s ease}
    .card:hover{border-color:var(--line-strong);transform:translateY(-4px)}
    .feature-main{padding:30px;min-height:280px;background:linear-gradient(145deg,rgba(23,73,97,.7),rgba(11,30,47,.78))}
    .card-label{color:var(--cyan);font-size:12px;font-weight:800}
    .feature-main h3{font-size:27px;margin:16px 0 12px}.feature-main p,.feature-small p{color:var(--muted);font-size:14px}
    .feature-main .inline-link{display:inline-block;margin-top:28px;color:var(--cyan);font-weight:700}
    .feature-side{display:grid;gap:18px}.feature-small{padding:23px}.feature-small h3{font-size:19px;margin:10px 0 6px}
    .mini-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:rgba(91,205,244,.12);color:var(--blue);font-size:18px}
    .scene-band{background:rgba(6,17,29,.5);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line);border-radius:18px;overflow:hidden}
    .scene-item{padding:28px;border-right:1px solid var(--line);position:relative}.scene-item:last-child{border-right:0}
    .scene-item.current{background:rgba(91,205,244,.1)}.scene-index{color:var(--blue);font-weight:800;font-size:13px}.scene-item h3{font-size:20px;margin:13px 0 8px}.scene-item p{color:var(--muted);font-size:14px}.scene-item:after{content:"→";position:absolute;right:22px;top:25px;color:var(--weak);font-size:22px}
    .case-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}.case-card{padding:27px}.case-card h3{font-size:21px;margin:13px 0 8px}.case-card p{color:var(--muted);font-size:14px}.case-meta{display:flex;justify-content:space-between;align-items:center;margin-top:22px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--weak)}.case-meta b{color:var(--good);font-weight:600}
    .news-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}.news-list{padding:8px 25px}.news-row{display:flex;align-items:center;gap:15px;padding:20px 0;border-bottom:1px solid var(--line)}.news-row:last-child{border-bottom:0}.news-date{color:var(--weak);font-size:12px;min-width:76px}.news-row strong{font-size:15px;flex:1}.news-row span:last-child{color:var(--cyan);font-size:13px}.news-feature{padding:28px;background:linear-gradient(145deg,rgba(54,54,110,.52),rgba(13,40,60,.7))}.news-feature h3{font-size:23px;margin:14px 0}.news-feature p{color:var(--muted);font-size:14px}.news-feature a{display:inline-block;margin-top:25px;color:var(--cyan);font-weight:700}
    .price-zone{background:rgba(6,17,29,.55);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.price-card{display:grid;grid-template-columns:1fr 1.25fr .65fr;gap:28px;align-items:center;padding:30px;border-color:var(--line-strong);box-shadow:var(--glow)}.price-card h3{font-size:28px;margin:8px 0}.price-card p{color:var(--muted);font-size:14px}.price-list{display:grid;grid-template-columns:1fr 1fr;gap:11px;color:var(--muted);font-size:14px}.price-list li{list-style:none}.price-list li:before{content:"✓";color:var(--good);margin-right:8px}.price-action{text-align:right}.price-action small{display:block;color:var(--weak);font-size:12px;margin-bottom:14px}
    .faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:46px}.faq-intro p{color:var(--muted);margin-top:15px;font-size:15px}.faq-list{display:grid;gap:10px}details{border:1px solid var(--line);border-radius:12px;background:rgba(13,32,50,.55);padding:0 19px}summary{list-style:none;cursor:pointer;padding:17px 0;font-weight:700;display:flex;justify-content:space-between;gap:20px}summary::-webkit-details-marker{display:none}summary:after{content:"+";color:var(--cyan);font-size:20px}details[open]{border-color:var(--line-strong);background:rgba(20,51,72,.72)}details[open] summary:after{content:"−"}details p{color:var(--muted);font-size:14px;padding:0 25px 18px 0}
    .cta{padding:54px 0}.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:38px 42px;border-radius:22px;background:linear-gradient(110deg,#102e47,#14234d);border:1px solid var(--line-strong);box-shadow:var(--shadow)}.cta h2{font-size:29px}.cta p{color:var(--muted);font-size:14px;margin-top:6px}
    footer{padding:32px 0;border-top:1px solid var(--line);background:rgba(3,11,20,.7)}.footer-row{display:flex;justify-content:space-between;gap:30px;align-items:center}.footer-note{color:var(--weak);font-size:13px;margin-top:8px}.footer-links{display:flex;gap:19px;color:var(--muted);font-size:13px}.footer-links a:hover{color:var(--cyan)}
    @media(max-width:992px){.toolbar{gap:14px}.brand{min-width:auto}.nav-links{gap:0}.nav-links a{padding:8px 8px;font-size:13px}.hero-grid{gap:34px}.feature-layout,.case-grid,.news-layout{grid-template-columns:1fr}.price-card{grid-template-columns:1fr 1fr}.price-action{text-align:left}.faq-grid{grid-template-columns:1fr;gap:25px}}
    @media(max-width:768px){.container{width:min(100% - 32px,var(--container))}.toolbar{height:68px}.nav-links{display:none}.toolbar-side{margin-left:auto}.status span{display:none}.menu-toggle{display:block}.hero{padding:52px 0 40px}.hero-grid{grid-template-columns:1fr}.hero-stage{min-height:330px}.hero-copy{font-size:16px}section{padding:58px 0}.section-head{display:block}.section-head p{margin-top:13px}.scene-grid{grid-template-columns:1fr}.scene-item{border-right:0;border-bottom:1px solid var(--line)}.scene-item:last-child{border-bottom:0}.price-card{grid-template-columns:1fr}.price-action{text-align:left}.cta-inner{display:block;padding:30px 25px}.cta .btn{margin-top:22px}.footer-row{display:block}.footer-links{margin-top:18px;flex-wrap:wrap}}
    @media(max-width:520px){h1{font-size:38px}.brand-name{font-size:14px}.hero-actions .btn{width:100%}.stage-main{gap:9px}.stage-block{padding:15px}.stage-block.large{min-height:125px}.floating{display:none}.feature-main,.case-card,.news-feature{padding:23px}.price-list{grid-template-columns:1fr}.section-head h2{font-size:29px}.footer-links{gap:12px}}

/* roulang page: category2 */
:root{
 --bg:#071321;
 --bg-deep:#050d18;
 --panel:#0d2032;
 --panel-soft:rgba(17,42,64,.72);
 --panel-light:rgba(24,62,88,.72);
 --line:rgba(142,207,236,.18);
 --line-strong:rgba(91,205,244,.42);
 --text:#edf8ff;
 --muted:#a7c0cf;
 --weak:#718b9b;
 --blue:#5bcdf2;
 --cyan:#8de9da;
 --violet:#9c9cf8;
 --good:#8de0bd;
 --warn:#f6c978;
 --radius:18px;
 --radius-sm:12px;
 --shadow:0 22px 70px rgba(0,0,0,.28);
 --glow:0 0 28px rgba(91,205,244,.25);
 --container:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
 margin:0;min-width:320px;background:
 radial-gradient(circle at 76% 10%,rgba(50,132,184,.17),transparent 27rem),
 radial-gradient(circle at 8% 42%,rgba(87,87,168,.11),transparent 24rem),var(--bg);
 color:var(--text);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
 font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;
}
body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.18;background-image:linear-gradient(rgba(129,200,225,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(129,200,225,.06) 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(to bottom,black,transparent 75%)}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;border-bottom:1px solid var(--line);background:rgba(5,15,27,.82);backdrop-filter:blur(18px)}
.header-row{height:72px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:11px;min-width:238px;font-weight:800;letter-spacing:0}
.brand-mark{width:35px;height:35px;border-radius:11px;display:grid;place-items:center;color:#062031;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:var(--glow);font-weight:900}
.brand-name{font-size:16px;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:5px;flex:1}
.nav-links a{padding:9px 13px;border-radius:10px;color:var(--muted);font-size:14px;transition:.2s ease}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(91,205,244,.11)}
.nav-links a.active{box-shadow:inset 0 -2px var(--blue)}
.header-tools{display:flex;align-items:center;gap:14px}
.status{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:12px;white-space:nowrap}
.status i{width:8px;height:8px;border-radius:50%;background:var(--good);box-shadow:0 0 12px var(--good)}
.btn{min-height:42px;padding:9px 17px;border:1px solid transparent;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:14px;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn:focus-visible,.nav-links a:focus-visible,.menu-toggle:focus-visible,summary:focus-visible{outline:3px solid rgba(141,233,218,.55);outline-offset:3px}
.btn-primary{color:#042033;background:linear-gradient(120deg,var(--blue),var(--cyan));box-shadow:0 0 24px rgba(91,205,244,.3)}
.btn-primary:hover{box-shadow:0 0 32px rgba(91,205,244,.5)}
.btn-secondary{color:var(--text);background:var(--panel-light);border-color:var(--line-strong)}
.btn-ghost{color:var(--muted);background:transparent;border-color:var(--line)}
.menu-toggle{display:none;border:1px solid var(--line);background:transparent;color:var(--text);width:42px;height:42px;border-radius:10px}
.page-hero{padding:62px 0 48px;border-bottom:1px solid var(--line)}
.breadcrumb{display:flex;gap:9px;color:var(--weak);font-size:13px;margin-bottom:18px}
.breadcrumb a:hover{color:var(--cyan)}
.kicker{display:inline-flex;align-items:center;gap:8px;color:var(--cyan);font-size:13px;font-weight:800;letter-spacing:.08em}
.kicker:before{content:"";width:22px;height:1px;background:var(--cyan)}
.page-hero-grid{display:grid;grid-template-columns:1fr 390px;gap:50px;align-items:end}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(38px,5vw,60px);line-height:1.16;letter-spacing:-.04em;margin:14px 0 18px}
.lead{max-width:680px;color:var(--muted);font-size:17px;margin-bottom:0}
.summary-panel{padding:24px;border:1px solid var(--line-strong);border-radius:22px;background:linear-gradient(145deg,rgba(24,62,88,.74),rgba(9,27,44,.82));box-shadow:var(--shadow)}
.summary-top{display:flex;justify-content:space-between;align-items:center;padding-bottom:18px;border-bottom:1px solid var(--line)}
.summary-top strong{font-size:18px}
.badge{display:inline-flex;align-items:center;min-height:27px;padding:4px 10px;border-radius:20px;font-size:12px;font-weight:800;color:var(--cyan);background:rgba(91,205,244,.1);border:1px solid rgba(91,205,244,.2)}
.summary-list{list-style:none;padding:0;margin:18px 0 0}
.summary-list li{display:flex;align-items:center;justify-content:space-between;padding:11px 0;border-bottom:1px solid rgba(142,207,236,.1);color:var(--muted);font-size:14px}
.summary-list li:last-child{border-bottom:0}
.summary-list b{color:var(--text);font-weight:700}
section{padding:72px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}
.section-head h2{font-size:32px;line-height:1.25;margin:8px 0 0}
.section-head p{max-width:500px;color:var(--muted);font-size:15px;margin-bottom:0}
.scene-tabs{display:flex;gap:10px;overflow:auto;padding-bottom:8px;margin-bottom:25px}
.scene-tabs a{flex:0 0 auto;padding:10px 17px;border-radius:12px;color:var(--muted);border:1px solid var(--line);background:rgba(13,32,50,.5);font-size:14px;transition:.2s}
.scene-tabs a:hover,.scene-tabs a.active{color:var(--text);border-color:var(--line-strong);background:rgba(91,205,244,.12)}
.explain-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:18px}
.explain-intro{padding:30px;border-radius:var(--radius);border:1px solid var(--line);background:rgba(17,42,64,.6)}
.explain-intro h3{font-size:25px;line-height:1.35;margin:15px 0 12px}
.explain-intro p{color:var(--muted);font-size:14px}
.note-line{display:flex;gap:10px;align-items:flex-start;color:var(--weak);font-size:13px;margin-top:25px}
.note-line i{width:8px;height:8px;background:var(--cyan);border-radius:50%;margin-top:9px;flex:0 0 auto}
.detail-stack{display:grid;gap:12px}
.detail-card{display:grid;grid-template-columns:70px 1fr auto;gap:18px;align-items:center;padding:20px 22px;border:1px solid var(--line);border-radius:16px;background:var(--panel-soft);transition:.25s}
.detail-card:hover{transform:translateX(4px);border-color:var(--line-strong);background:rgba(24,62,88,.72)}
.detail-number{font-size:28px;font-weight:900;color:var(--blue);letter-spacing:-.05em}
.detail-card h3{font-size:18px;margin:0 0 4px}
.detail-card p{margin:0;color:var(--muted);font-size:14px}
.detail-state{font-size:12px;color:var(--good);white-space:nowrap}
.steps-section{background:rgba(5,13,24,.34);border-top:1px solid rgba(142,207,236,.08);border-bottom:1px solid rgba(142,207,236,.08)}
.steps-layout{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}
.steps-copy h2{font-size:34px;line-height:1.28;margin:9px 0 15px}
.steps-copy p{color:var(--muted);max-width:500px}
.step-list{position:relative;margin-top:4px}
.step-list:before{content:"";position:absolute;left:21px;top:25px;bottom:25px;width:1px;background:linear-gradient(var(--blue),rgba(91,205,244,.08))}
.step{position:relative;display:grid;grid-template-columns:44px 1fr;gap:18px;margin-bottom:24px}
.step:last-child{margin-bottom:0}
.step-dot{width:44px;height:44px;display:grid;place-items:center;border-radius:14px;background:#102b43;border:1px solid var(--line-strong);color:var(--cyan);font-weight:900;z-index:1}
.step h3{font-size:18px;margin:2px 0 4px}
.step p{font-size:14px;color:var(--muted);margin:0}
.compare-panel{padding:28px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(145deg,rgba(18,51,74,.7),rgba(8,23,39,.76));box-shadow:var(--shadow)}
.compare-head{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:22px}
.compare-head h3{font-size:22px;margin:0}
.compare-head span{font-size:12px;color:var(--weak)}
.compare-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:13px}
.compare-box{padding:16px;border-radius:13px;background:rgba(4,15,27,.48);border:1px solid var(--line)}
.compare-box small{display:block;color:var(--weak);font-size:12px;margin-bottom:6px}
.compare-box strong{font-size:15px}
.compare-box.good{border-color:rgba(141,224,189,.28)}
.compare-box.good strong{color:var(--good)}
.meter{height:6px;margin-top:18px;background:#17384d;border-radius:10px;overflow:hidden}
.meter i{display:block;width:84%;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--blue),var(--cyan))}
.related{display:grid;grid-template-columns:1.35fr .65fr;gap:18px}
.related-main,.related-side{padding:28px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel-soft)}
.related-main{background:linear-gradient(145deg,rgba(23,73,97,.65),rgba(11,30,47,.78))}
.related h3{font-size:23px;margin:12px 0 9px}
.related p{color:var(--muted);font-size:14px;margin-bottom:20px}
.related-side{display:flex;flex-direction:column;justify-content:space-between}
.related-side h3{font-size:18px}
.related-side a{color:var(--cyan);font-size:14px;font-weight:700}
.faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:55px}
.faq-intro h2{font-size:32px;line-height:1.3;margin:9px 0 14px}
.faq-intro p{color:var(--muted);font-size:14px}
.faq-list{display:grid;gap:10px}
details{border:1px solid var(--line);border-radius:14px;background:rgba(17,42,64,.56);transition:.2s}
details[open]{border-color:var(--line-strong);background:rgba(24,62,88,.68)}
summary{list-style:none;cursor:pointer;padding:17px 20px;font-weight:700;display:flex;justify-content:space-between;gap:15px}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";color:var(--cyan);font-size:20px;line-height:1}
details[open] summary:after{content:"−"}
details p{padding:0 20px 18px;margin:0;color:var(--muted);font-size:14px}
.cta{padding:34px 0 76px}
.cta-box{display:flex;justify-content:space-between;align-items:center;gap:25px;padding:34px 38px;border-radius:24px;background:linear-gradient(110deg,#0d2a43,#102b48);border:1px solid var(--line-strong);box-shadow:var(--shadow)}
.cta-box h2{font-size:28px;margin:0 0 7px}
.cta-box p{color:var(--muted);margin:0;font-size:14px}
footer{border-top:1px solid var(--line);padding:30px 0;background:rgba(5,13,24,.55)}
.footer-row{display:flex;justify-content:space-between;align-items:center;gap:25px}
.footer-note{color:var(--weak);font-size:13px;margin:10px 0 0}
.footer-links{display:flex;gap:22px;flex-wrap:wrap;color:var(--muted);font-size:13px}
.footer-links a{transition:.2s}
.footer-links a:hover{color:var(--cyan)}
@media(max-width:992px){
 .header-row{gap:15px}.brand{min-width:auto}.nav-links{justify-content:center}
 .header-tools .status{display:none}.page-hero-grid{grid-template-columns:1fr 340px;gap:25px}
 .steps-layout,.faq-grid{grid-template-columns:1fr;gap:30px}
}
@media(max-width:768px){
 .container{width:min(var(--container),calc(100% - 32px))}
 .header-row{height:66px}.brand-name{font-size:14px}.brand-mark{width:32px;height:32px}
 .nav-links{display:none;position:absolute;top:66px;left:16px;right:16px;padding:12px;flex-direction:column;align-items:stretch;background:rgba(5,15,27,.97);border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow)}
 .nav-links.open{display:flex}.nav-links a{padding:13px 15px}
 .header-tools{margin-left:auto}.header-tools .btn{display:none}.menu-toggle{display:block}
 .page-hero{padding:44px 0 38px}.page-hero-grid{grid-template-columns:1fr}.summary-panel{max-width:520px}
 section{padding:54px 0}.section-head{display:block}.section-head h2{font-size:28px;margin-bottom:9px}
 .explain-grid,.related{grid-template-columns:1fr}.detail-card{grid-template-columns:52px 1fr}.detail-state{grid-column:2}
 .cta-box{display:block;padding:28px}.cta-box .btn{margin-top:20px}
 .footer-row{display:block}.footer-links{margin-top:22px}
}
@media(max-width:520px){
 h1{font-size:36px}.lead{font-size:15px}.page-hero-grid{gap:28px}
 .summary-panel{padding:19px}.scene-tabs{margin-right:-16px;padding-right:16px}
 .detail-card{padding:17px;gap:12px}.detail-number{font-size:24px}
 .compare-panel{padding:20px}.compare-head{display:block}.compare-head span{display:block;margin-top:5px}
 .compare-row{grid-template-columns:1fr;gap:8px}.steps-copy h2,.faq-intro h2{font-size:28px}
 .footer-links{gap:14px}
}

/* roulang page: category1 */
:root{
 --bg:#071321;
 --bg-deep:#050d18;
 --panel:#0d2032;
 --panel-soft:rgba(17,42,64,.72);
 --panel-light:rgba(24,62,88,.72);
 --line:rgba(142,207,236,.18);
 --line-strong:rgba(91,205,244,.42);
 --text:#edf8ff;
 --muted:#a7c0cf;
 --weak:#718b9b;
 --blue:#5bcdf2;
 --cyan:#8de9da;
 --violet:#9c9cf8;
 --good:#8de0bd;
 --warn:#f6c978;
 --danger:#f29b9b;
 --radius:18px;
 --radius-sm:12px;
 --shadow:0 22px 70px rgba(0,0,0,.28);
 --glow:0 0 28px rgba(91,205,244,.25);
 --container:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
 min-width:320px;
 background:
 radial-gradient(circle at 76% 10%,rgba(50,132,184,.17),transparent 27rem),
 radial-gradient(circle at 8% 42%,rgba(87,87,168,.11),transparent 24rem),
 var(--bg);
 color:var(--text);
 font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
 font-size:16px;line-height:1.7;
 -webkit-font-smoothing:antialiased;
}
body:before{
 content:"";position:fixed;inset:0;pointer-events:none;opacity:.18;
 background-image:linear-gradient(rgba(129,200,225,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(129,200,225,.06) 1px,transparent 1px);
 background-size:42px 42px;mask-image:linear-gradient(to bottom,black,transparent 75%);
}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
h1,h2,h3{line-height:1.25;letter-spacing:-.025em}
.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
.site-header{
 position:sticky;top:0;z-index:20;
 border-bottom:1px solid var(--line);
 background:rgba(5,15,27,.84);
 backdrop-filter:blur(18px);
}
.toolbar{min-height:72px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:11px;min-width:238px;font-weight:800;letter-spacing:0}
.brand-mark{width:35px;height:35px;border-radius:11px;display:grid;place-items:center;color:#062031;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:var(--glow);font-weight:900}
.brand-name{font-size:16px;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:5px;flex:1}
.nav-links a{padding:9px 13px;border-radius:10px;color:var(--muted);font-size:14px;transition:.2s ease}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(91,205,244,.11)}
.nav-links a.active{box-shadow:inset 0 -2px var(--blue)}
.toolbar-end{display:flex;align-items:center;gap:14px}
.status{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:13px;white-space:nowrap}
.status i{width:8px;height:8px;border-radius:50%;background:var(--good);box-shadow:0 0 12px var(--good)}
.btn{min-height:42px;padding:9px 17px;border:1px solid transparent;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:14px;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn:focus-visible,.nav-links a:focus-visible,.menu-toggle:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid rgba(141,233,218,.55);outline-offset:3px}
.btn-primary{color:#042033;background:linear-gradient(120deg,var(--blue),var(--cyan));box-shadow:0 0 24px rgba(91,205,244,.3)}
.btn-primary:hover{box-shadow:0 0 32px rgba(91,205,244,.5)}
.btn-secondary{color:var(--text);background:var(--panel-light);border-color:var(--line-strong)}
.btn-ghost{color:var(--muted);background:transparent;border-color:var(--line)}
.menu-toggle{display:none;border:1px solid var(--line);background:transparent;color:var(--text);width:42px;height:42px;border-radius:10px}
.page-hero{padding:62px 0 42px}
.breadcrumb{display:flex;gap:9px;align-items:center;color:var(--weak);font-size:13px;margin-bottom:22px}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb span{color:var(--line-strong)}
.hero-layout{display:grid;grid-template-columns:1fr 360px;gap:56px;align-items:end}
.eyebrow,.kicker{display:inline-flex;align-items:center;gap:8px;color:var(--cyan);font-size:13px;font-weight:800;letter-spacing:.08em}
.eyebrow:before{content:"";width:22px;height:1px;background:var(--cyan)}
.page-hero h1{font-size:clamp(38px,5vw,60px);max-width:760px;margin:14px 0 18px}
.lead{max-width:720px;color:var(--muted);font-size:17px}
.hero-note{padding:22px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel-soft);box-shadow:var(--shadow)}
.hero-note .note-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.note-top strong{font-size:15px}.note-top span{color:var(--good);font-size:12px}
.note-list{display:grid;gap:12px}
.note-list div{display:flex;align-items:center;gap:10px;padding-bottom:11px;border-bottom:1px solid var(--line);color:var(--muted);font-size:13px}
.note-list div:last-child{border:0;padding-bottom:0}
.note-list i{width:8px;height:8px;border-radius:3px;background:var(--blue)}
section{padding:58px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:26px}
.section-head h2{font-size:32px;margin-top:8px}
.section-head p{max-width:520px;color:var(--muted);font-size:15px}
.index-layout{display:grid;grid-template-columns:245px 1fr 270px;gap:18px;align-items:start}
.panel,.card{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel-soft);box-shadow:0 12px 38px rgba(0,0,0,.16)}
.filter-panel{padding:22px;position:sticky;top:94px}
.filter-title{font-size:16px;font-weight:800;margin-bottom:17px}
.filter-label{display:block;color:var(--weak);font-size:12px;margin:18px 0 8px}
.filter-list{display:grid;gap:6px}
.filter-list button{width:100%;text-align:left;padding:10px 11px;border:1px solid transparent;border-radius:10px;color:var(--muted);background:transparent;font-size:14px;transition:.2s}
.filter-list button:hover,.filter-list button.active{color:var(--text);background:rgba(91,205,244,.11);border-color:var(--line)}
.filter-list button.active{box-shadow:inset 3px 0 var(--blue)}
.filter-status{margin-top:24px;padding-top:17px;border-top:1px solid var(--line);color:var(--weak);font-size:12px}
.content-column{display:grid;gap:14px}
.searchbar{display:flex;gap:10px;margin-bottom:4px}
.searchbar input{width:100%;height:46px;border:1px solid var(--line);border-radius:11px;background:rgba(5,20,34,.68);color:var(--text);padding:0 15px}
.searchbar input::placeholder{color:var(--weak)}
.searchbar input:focus{border-color:var(--line-strong);box-shadow:0 0 0 3px rgba(91,205,244,.1);outline:0}
.searchbar .btn{min-width:88px}
.result-card{padding:22px;display:grid;grid-template-columns:1fr auto;gap:17px;transition:.25s}
.result-card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.result-meta{display:flex;align-items:center;gap:9px;margin-bottom:8px}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 9px;border-radius:20px;color:var(--cyan);background:rgba(141,233,218,.1);font-size:12px;font-weight:700}
.badge.blue{color:var(--blue);background:rgba(91,205,244,.1)}
.badge.violet{color:var(--violet);background:rgba(156,156,248,.1)}
.result-meta time{color:var(--weak);font-size:12px}
.result-card h3{font-size:19px;margin-bottom:7px}
.result-card p{color:var(--muted);font-size:14px;max-width:580px}
.result-action{align-self:center;color:var(--cyan);font-size:13px;font-weight:700;white-space:nowrap}
.result-action:hover{text-decoration:underline}
.side-stack{display:grid;gap:18px}
.summary-card{padding:23px;background:linear-gradient(145deg,rgba(25,71,96,.7),rgba(11,30,47,.78))}
.summary-card h3{font-size:20px;margin:10px 0 9px}
.summary-card p{color:var(--muted);font-size:14px}
.metric{display:flex;justify-content:space-between;align-items:center;padding:14px 0;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.metric:last-child{border-bottom:0}.metric strong{color:var(--text);font-size:16px}
.download-card{padding:22px}
.download-card h3{font-size:18px;margin-bottom:8px}
.download-card p{color:var(--muted);font-size:13px;margin-bottom:17px}
.download-card input{width:100%;height:43px;border:1px solid var(--line);border-radius:10px;background:rgba(5,20,34,.65);color:var(--text);padding:0 12px;margin-bottom:10px}
.download-card input::placeholder{color:var(--weak)}
.download-card .btn{width:100%}
.empty-state{display:none;padding:34px;text-align:center;color:var(--muted)}
.pagination{display:flex;justify-content:center;gap:8px;margin-top:25px}
.pagination button{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;background:var(--panel-soft);color:var(--muted)}
.pagination button:hover,.pagination button.active{color:var(--text);border-color:var(--line-strong);background:rgba(91,205,244,.12)}
.faq-section{background:rgba(5,14,25,.28)}
.faq-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:50px}
.faq-intro p{color:var(--muted);font-size:15px;margin-top:14px}
.faq-list{display:grid;gap:10px}
details{border:1px solid var(--line);border-radius:13px;background:var(--panel-soft);transition:.2s}
details[open]{border-color:var(--line-strong);background:rgba(17,48,70,.78)}
summary{cursor:pointer;list-style:none;padding:18px 20px;font-weight:700;position:relative;padding-right:45px}
summary::-webkit-details-marker{display:none}
summary:after{content:"＋";position:absolute;right:19px;color:var(--cyan);font-size:20px;line-height:1}
details[open] summary:after{content:"－"}
.answer{padding:0 20px 18px;color:var(--muted);font-size:14px}
.cta{padding:45px 0 66px}
.cta-box{display:flex;justify-content:space-between;align-items:center;gap:28px;padding:32px 36px;border:1px solid var(--line-strong);border-radius:22px;background:linear-gradient(105deg,rgba(20,65,91,.86),rgba(12,31,54,.88));box-shadow:var(--shadow)}
.cta-box h2{font-size:28px}.cta-box p{color:var(--muted);margin-top:7px;font-size:14px}
footer{border-top:1px solid var(--line);padding:34px 0 40px;background:rgba(4,12,22,.45)}
.footer-row{display:flex;justify-content:space-between;align-items:end;gap:30px}
.footer-note{color:var(--weak);font-size:13px;margin:12px 0 0 46px}
.footer-links{display:flex;flex-wrap:wrap;gap:20px;color:var(--muted);font-size:13px}
.footer-links a:hover{color:var(--cyan)}
.copyright{margin-top:27px;color:var(--weak);font-size:12px}
@media(max-width:1100px){
 .index-layout{grid-template-columns:220px 1fr}.side-stack{grid-column:1/-1;grid-template-columns:1fr 1fr}.download-card{height:100%}
}
@media(max-width:900px){
 .toolbar{gap:15px}.brand{min-width:auto}.nav-links{gap:0}.nav-links a{padding:8px 9px}
 .status{display:none}.hero-layout{grid-template-columns:1fr;gap:28px}.hero-note{max-width:520px}
 .index-layout{grid-template-columns:1fr}.filter-panel{position:static}.filter-list{display:flex;flex-wrap:wrap}.filter-list button{width:auto}
}
@media(max-width:700px){
 .container{width:min(var(--container),calc(100% - 32px))}
 .toolbar{min-height:64px}.brand-name{font-size:14px}.brand-mark{width:32px;height:32px}
 .nav-links{display:none;position:absolute;top:64px;left:16px;right:16px;padding:10px;flex-direction:column;align-items:stretch;border:1px solid var(--line);border-radius:14px;background:rgba(5,18,31,.97);box-shadow:var(--shadow)}
 .nav-links.open{display:flex}.nav-links a{padding:13px 14px}
 .toolbar-end{margin-left:auto}.toolbar-end .btn{display:none}.menu-toggle{display:block}
 .page-hero{padding:42px 0 28px}.page-hero h1{font-size:38px}.lead{font-size:15px}
 section{padding:42px 0}.section-head,.cta-box,.footer-row{display:block}.section-head h2{font-size:27px}.section-head p{margin-top:12px}
 .searchbar{flex-direction:column}.searchbar .btn{width:100%}
 .result-card{grid-template-columns:1fr}.result-action{justify-self:start}
 .side-stack{grid-template-columns:1fr}.faq-layout{grid-template-columns:1fr;gap:25px}
 .cta-box{padding:27px 24px}.cta-box .btn{margin-top:20px;width:100%}
 .footer-links{margin-top:25px}.footer-note{margin-left:0}.copyright{margin-top:22px}
}
@media(max-width:480px){
 .page-hero h1{font-size:32px}.hero-note{padding:17px}.filter-panel,.result-card,.summary-card,.download-card{padding:18px}
 .result-card h3{font-size:17px}.pagination{gap:5px}
}