/* roulang page: index */
:root{
 --blue:#2563b8;--blue-dark:#174985;--blue-light:#eaf4ff;--cyan:#dff7f7;
 --orange:#f08a45;--coral:#fff0e8;--ink:#172b4d;--muted:#66758c;
 --line:#dce6f1;--bg:#f6f9fc;--white:#fff;--shadow:0 14px 36px rgba(26,73,125,.09);
 --radius:18px;--container:1200px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{font:inherit;border:0;cursor:pointer}.container{width:min(var(--container),calc(100% - 40px));margin: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{height:76px;display:flex;align-items:center;gap:28px}.logo{font-size:21px;font-weight:800;color:var(--blue-dark);letter-spacing:-.5px;white-space:nowrap}.logo b{color:var(--orange)}.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}.nav-links a{padding:9px 13px;border-radius:9px;color:#53647b;font-size:14px;transition:.2s}.nav-links a:hover,.nav-links a.active{background:var(--blue-light);color:var(--blue);font-weight:700}.nav-cta,.btn-primary{background:var(--blue);color:#fff!important;padding:11px 19px;border-radius:9px;font-weight:700;box-shadow:0 8px 18px rgba(37,99,184,.18);transition:.2s}.nav-cta:hover,.btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px)}.menu-toggle{display:none;background:var(--blue-light);color:var(--blue);padding:9px 12px;border-radius:8px}.hero{padding:70px 0 76px;background:linear-gradient(115deg,#eef7ff 0%,#fff 57%,#f5fbff 100%);overflow:hidden}.hero-grid{display:grid;grid-template-columns:1fr 1.08fr;gap:60px;align-items:center}.eyebrow,.section-kicker{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:1.5px;text-transform:uppercase}.hero h1{font-size:clamp(34px,4.4vw,60px);line-height:1.18;letter-spacing:-2px;margin:17px 0 22px;color:var(--ink)}.hero h1 span{color:var(--blue)}.hero p{font-size:17px;color:var(--muted);margin:0 0 28px;max-width:620px}.actions{display:flex;gap:12px;flex-wrap:wrap}.btn-secondary{background:#fff;border:1px solid #bcd0e6;color:var(--blue);padding:10px 18px;border-radius:9px;font-weight:700;transition:.2s}.btn-secondary:hover{border-color:var(--blue);background:var(--blue-light);transform:translateY(-2px)}.hero-note{display:flex;gap:20px;margin-top:28px;color:var(--muted);font-size:13px}.hero-note strong{display:block;color:var(--ink);font-size:19px}.stage{position:relative;min-height:400px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}.stage-main{height:360px;object-fit:cover;width:100%;border-radius:14px}.stage-card{position:absolute;right:-18px;bottom:27px;background:#fff;border:1px solid var(--line);border-radius:13px;padding:14px 17px;box-shadow:0 12px 28px rgba(25,63,110,.16);font-size:13px}.stage-card strong{display:block;font-size:16px;color:var(--blue-dark)}section{padding:78px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:30px}.section-head h2{font-size:30px;line-height:1.3;margin:8px 0 0;letter-spacing:-.7px}.section-head p{max-width:600px;color:var(--muted);margin:0}.soft{background:#eef6fd}.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.feature{padding:25px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);display:grid;grid-template-columns:46px 1fr;gap:16px;transition:.25s}.feature:hover,.case:hover,.price:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.feature-icon{width:46px;height:46px;border-radius:12px;background:var(--blue-light);color:var(--blue);display:grid;place-items:center;font-weight:800;font-size:18px}.feature h3,.case h3,.price h3{margin:0 0 6px;font-size:18px}.feature p,.case p,.price p{margin:0;color:var(--muted);font-size:14px}.timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid #b8d2ec}.step{position:relative;padding:28px 17px 0}.step:before{content:"";position:absolute;top:-10px;left:17px;width:18px;height:18px;background:var(--blue);border:4px solid #e8f3ff;border-radius:50%}.step b{color:var(--blue);font-size:13px}.step h3{font-size:17px;margin:8px 0}.step p{font-size:13px;color:var(--muted);margin:0}.scene-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}.scene-main{min-height:330px;background:linear-gradient(0deg,rgba(10,38,73,.72),rgba(10,38,73,.05)),url('/assets/images/b256174c88dbcbc3.jpg') center/cover;border-radius:18px;padding:30px;color:#fff;display:flex;align-items:end}.scene-main h3{font-size:27px;margin:0 0 10px}.scene-main p{margin:0;color:#e8f3ff}.scene-list{display:grid;gap:12px}.scene-item{background:#fff;border:1px solid var(--line);padding:17px 19px;border-radius:13px}.scene-item b{display:block;color:var(--blue-dark)}.scene-item span{color:var(--muted);font-size:13px}.demo{background:#fff}.demo-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:30px;align-items:center}.demo-image{border-radius:17px;height:355px;width:100%;object-fit:cover;box-shadow:var(--shadow)}.demo-list{display:grid;gap:14px}.demo-list li{list-style:none;padding:14px 16px;border-left:3px solid var(--blue);background:var(--blue-light);color:#3c5573}.demo-list strong{display:block;color:var(--ink)}.case-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:16px}.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}.case img{height:160px;width:100%;object-fit:cover}.case-body{padding:19px}.tag{display:inline-block;background:var(--coral);color:#b65d2b;padding:4px 9px;border-radius:5px;font-size:12px;font-weight:700;margin-bottom:10px}.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;align-items:stretch}.price{background:#fff;border:1px solid var(--line);border-radius:16px;padding:25px;position:relative;transition:.25s}.price.recommend{border:2px solid var(--blue);box-shadow:0 15px 35px rgba(37,99,184,.13)}.recommend-label{position:absolute;top:15px;right:15px;background:var(--blue);color:#fff;font-size:12px;padding:4px 9px;border-radius:5px}.price .amount{font-size:30px;color:var(--blue-dark);font-weight:800;margin:16px 0}.price ul{padding:0;margin:20px 0;list-style:none;color:var(--muted);font-size:14px}.price li{padding:7px 0;border-bottom:1px solid #edf1f6}.price li:before{content:"✓";color:var(--blue);font-weight:800;margin-right:8px}.quote-strip{display:flex;gap:16px;overflow:auto;padding-bottom:8px}.quote{min-width:280px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px}.quote p{margin:0 0 14px;color:#435673;font-size:15px}.quote small{color:var(--muted)}.stats{display:grid;grid-template-columns:repeat(4,1fr);background:var(--blue-dark);border-radius:18px;color:#fff;overflow:hidden}.stat{padding:28px;border-right:1px solid rgba(255,255,255,.18)}.stat:last-child{border:0}.stat strong{font-size:29px;display:block}.stat span{color:#c9dcf1;font-size:13px}.news-layout{display:grid;grid-template-columns:1fr 330px;gap:25px}.news-list{background:#fff;border:1px solid var(--line);border-radius:16px}.news-item{display:grid;grid-template-columns:85px 1fr auto;gap:17px;align-items:center;padding:19px 22px;border-bottom:1px solid var(--line);transition:.2s}.news-item:last-child{border:0}.news-item:hover{background:var(--blue-light)}.news-item time,.news-item small{color:var(--muted);font-size:12px}.news-item h3{margin:0;font-size:16px}.side-topic{background:#eaf4ff;border-radius:16px;padding:24px}.side-topic h3{margin-top:0}.side-topic a{display:block;padding:12px 0;border-bottom:1px solid #cbdff2;color:var(--blue-dark);font-weight:700;font-size:14px}.tips{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.tip{background:#fff;border:1px solid var(--line);padding:20px;border-radius:14px}.tip b{display:block;color:var(--blue);margin-bottom:8px}.tip p{margin:0;font-size:13px;color:var(--muted)}.topics{display:flex;flex-wrap:wrap;gap:12px;padding:27px;background:#fff;border:1px solid var(--line);border-radius:17px}.topic{padding:11px 18px;border-radius:30px;background:var(--blue-light);color:var(--blue-dark);font-weight:700;font-size:14px}.faq{max-width:850px;margin:auto}.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:11px;padding:17px 20px}.faq summary{cursor:pointer;font-weight:700;color:var(--ink);min-height:25px}.faq details p{color:var(--muted);font-size:14px;margin:14px 0 0}.cta-section{padding:60px 0}.cta-box{background:linear-gradient(110deg,#e7f3ff,#f3fbff);border:1px solid #c7deef;border-radius:22px;padding:45px;display:flex;justify-content:space-between;align-items:center;gap:25px}.cta-box h2{margin:0 0 8px;font-size:29px}.cta-box p{margin:0;color:var(--muted)}.site-footer{background:#142a48;color:#c8d6e8;padding:48px 0 25px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:35px}.footer-logo{color:#fff;font-size:20px;font-weight:800}.footer-grid h3{font-size:14px;color:#fff;margin:0 0 13px}.footer-grid a{display:block;color:#b4c5da;font-size:13px;margin:8px 0}.footer-grid a:hover{color:#fff}.footer-desc{font-size:13px;max-width:280px;color:#9eb2c9}.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:35px;padding-top:20px;font-size:12px;color:#91a7c0}
:focus-visible{outline:3px solid #f5a56d;outline-offset:3px}
@media(max-width:900px){.nav-links{gap:0}.nav-links a{padding:8px}.hero-grid,.scene-layout,.demo-grid,.news-layout{grid-template-columns:1fr}.hero{padding-top:48px}.case-grid{grid-template-columns:repeat(2,1fr)}.case:first-child{grid-column:span 2}.tips{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.container{width:min(100% - 28px,var(--container))}.nav{height:66px}.menu-toggle{display:block;margin-left:auto}.nav-links{display:none;position:absolute;top:66px;left:14px;right:14px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav-links.open{display:flex}.nav-links a,.nav-cta{display:block;text-align:center;margin:3px}.hero h1{font-size:38px}.feature-grid,.price-grid{grid-template-columns:1fr}.timeline{display:block;border-top:0;border-left:2px solid #b8d2ec;margin-left:9px}.step{padding:0 0 26px 28px}.step:before{left:-10px;top:2px}.stats{grid-template-columns:repeat(2,1fr)}.stat{border-bottom:1px solid rgba(255,255,255,.18)}.stat:nth-child(2){border-right:0}.cta-box{display:block;padding:30px}.cta-box .actions{margin-top:22px}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){section{padding:55px 0}.section-head{display:block}.section-head h2{font-size:25px}.section-head p{margin-top:12px}.hero p{font-size:15px}.stage{min-height:280px}.stage-main{height:250px}.stage-card{right:8px;bottom:18px}.hero-note{gap:12px}.case-grid{display:block}.case{margin-bottom:14px}.tips{grid-template-columns:1fr}.news-item{grid-template-columns:1fr;gap:4px;padding:16px}.news-item small{display:none}.footer-grid{grid-template-columns:1fr}.stats{grid-template-columns:1fr 1fr}.stat{padding:20px 14px}.stat strong{font-size:24px}}

/* roulang page: category1 */
:root{
 --blue:#2563b8;--blue-dark:#174985;--blue-light:#eaf4ff;--cyan:#dff7f7;
 --orange:#f08a45;--coral:#fff0e8;--ink:#172b4d;--muted:#66758c;
 --line:#dce6f1;--bg:#f6f9fc;--white:#fff;--shadow:0 14px 36px rgba(26,73,125,.09);
 --radius:18px;--container:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;border:0;cursor:pointer}
.container{width:min(var(--container),calc(100% - 40px));margin: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{height:76px;display:flex;align-items:center;gap:28px}
.logo{font-size:21px;font-weight:800;color:var(--blue-dark);letter-spacing:-.5px;white-space:nowrap}
.logo b{color:var(--orange)}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links a{padding:9px 13px;border-radius:9px;color:#53647b;font-size:14px;transition:.2s}
.nav-links a:hover,.nav-links a.active{background:var(--blue-light);color:var(--blue);font-weight:700}
.nav-cta,.btn-primary{background:var(--blue);color:#fff!important;padding:11px 19px;border-radius:9px;font-weight:700;box-shadow:0 8px 18px rgba(37,99,184,.18);transition:.2s}
.nav-cta:hover,.btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px)}
.menu-toggle{display:none;background:var(--blue-light);color:var(--blue);padding:9px 12px;border-radius:8px}
.page-head{padding:68px 0 54px;background:linear-gradient(115deg,#eef7ff 0%,#fff 58%,#f5fbff 100%)}
.page-head-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:55px;align-items:center}
.eyebrow,.section-kicker{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:1.5px}
.page-head h1{font-size:clamp(34px,4vw,56px);line-height:1.2;letter-spacing:-1.8px;margin:15px 0 18px}
.page-head h1 span{color:var(--blue)}
.page-head p{font-size:17px;color:var(--muted);max-width:680px;margin:0}
.head-visual{position:relative;border-radius:20px;overflow:hidden;min-height:275px;box-shadow:var(--shadow);border:1px solid #cbddec}
.head-visual img{width:100%;height:275px;object-fit:cover}
.visual-caption{position:absolute;left:0;right:0;bottom:0;padding:30px 24px 20px;color:#fff;background:linear-gradient(transparent,rgba(11,42,78,.82))}
.visual-caption strong{display:block;font-size:21px}
.visual-caption span{font-size:13px;color:#e1effc}
.tag-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:25px}
.tag{display:inline-block;background:var(--coral);color:#b65d2b;padding:5px 10px;border-radius:6px;font-size:12px;font-weight:700}
.tag.blue{background:var(--blue-light);color:var(--blue)}
section{padding:72px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
.section-head h2{font-size:30px;line-height:1.3;margin:7px 0 0;letter-spacing:-.7px}
.section-head p{max-width:600px;color:var(--muted);margin:0}
.filter-bar{display:flex;gap:10px;overflow-x:auto;padding:5px 0 16px;border-bottom:1px solid var(--line);scrollbar-width:thin}
.filter-bar button{white-space:nowrap;padding:10px 18px;border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:9px;transition:.2s}
.filter-bar button:hover,.filter-bar button.active{background:var(--blue);border-color:var(--blue);color:#fff}
.tool-index{background:#fff;border:1px solid var(--line);border-radius:16px;display:grid;grid-template-columns:repeat(6,1fr);overflow:hidden;box-shadow:0 7px 24px rgba(26,73,125,.04)}
.index-item{padding:22px 17px;border-right:1px solid var(--line);transition:.2s}
.index-item:last-child{border:0}
.index-item:hover{background:var(--blue-light)}
.index-item b{display:block;color:var(--blue-dark);font-size:16px;margin-bottom:5px}
.index-item span{font-size:13px;color:var(--muted)}
.tools-wrap{display:grid;grid-template-columns:1.65fr .75fr;gap:22px;align-items:start}
.tool-list{display:grid;gap:14px}
.tool-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:23px 25px;display:grid;grid-template-columns:52px 1fr auto;gap:18px;align-items:center;transition:.24s}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#b9d4ed}
.tool-icon{height:48px;width:48px;border-radius:13px;background:var(--blue-light);color:var(--blue);display:grid;place-items:center;font-size:21px;font-weight:800}
.tool-card h3{margin:0 0 5px;font-size:18px}
.tool-card p{margin:0;color:var(--muted);font-size:14px}
.tool-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.tool-meta span{font-size:12px;color:var(--blue-dark);background:#f2f7fc;padding:3px 8px;border-radius:5px}
.tool-action{color:var(--blue);font-size:13px;font-weight:700;white-space:nowrap}
.side-panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;position:sticky;top:98px}
.side-panel h3{margin:0 0 16px;font-size:19px}
.side-panel ul{margin:0;padding:0;list-style:none}
.side-panel li{padding:13px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}
.side-panel li:last-child{border:0}
.side-panel strong{color:var(--blue-dark);display:block}
.process{background:#eef6fd}
.process-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border:1px solid #cbddec;border-radius:16px;overflow:hidden;background:#fff}
.process-step{padding:24px 19px;min-height:170px;border-right:1px solid var(--line);position:relative}
.process-step:last-child{border:0}
.process-num{font-size:13px;font-weight:800;color:var(--orange)}
.process-step h3{font-size:17px;margin:11px 0 7px}
.process-step p{font-size:13px;color:var(--muted);margin:0}
.scene-layout{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.scene-card{min-height:245px;border-radius:18px;overflow:hidden;position:relative;background:#fff;border:1px solid var(--line)}
.scene-card img{width:100%;height:100%;object-fit:cover}
.scene-card .scene-copy{position:absolute;inset:auto 0 0;padding:28px 23px 20px;background:linear-gradient(transparent,rgba(13,47,84,.88));color:#fff}
.scene-copy h3{margin:0 0 5px;font-size:21px}
.scene-copy p{margin:0;font-size:13px;color:#e7f1fb}
.scene-points{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.scene-point{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px}
.scene-point b{display:block;color:var(--blue-dark);margin-bottom:5px}
.scene-point span{font-size:13px;color:var(--muted)}
.tips-section{background:#fff}
.tips-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tip-card{padding:23px;background:var(--bg);border:1px solid var(--line);border-radius:15px}
.tip-card .tip-no{color:var(--orange);font-weight:800;font-size:13px}
.tip-card h3{margin:9px 0 6px;font-size:18px}
.tip-card p{font-size:14px;color:var(--muted);margin:0}
.faq{max-width:880px;margin:auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:11px;padding:17px 20px}
.faq summary{cursor:pointer;font-weight:700;color:var(--ink);min-height:25px}
.faq summary:focus{outline:3px solid #bcd7f2;outline-offset:3px}
.faq details p{color:var(--muted);font-size:14px;margin:14px 0 0}
.article-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:16px}
.article-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;transition:.2s}
.article-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.article-card h3{font-size:18px;line-height:1.45;margin:12px 0 8px}
.article-card p{font-size:14px;color:var(--muted);margin:0 0 15px}
.article-card small{color:var(--muted)}
.cta-section{padding:60px 0}
.cta-box{background:linear-gradient(110deg,#e7f3ff,#f3fbff);border:1px solid #c7deef;border-radius:22px;padding:43px;display:flex;justify-content:space-between;align-items:center;gap:25px}
.cta-box h2{margin:0 0 8px;font-size:29px}
.cta-box p{margin:0;color:var(--muted)}
.site-footer{background:#142a48;color:#c8d6e8;padding:48px 0 25px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:35px}
.footer-logo{color:#fff;font-size:20px;font-weight:800}
.footer-grid h3{font-size:14px;color:#fff;margin:0 0 13px}
.footer-grid a{display:block;color:#b4c5da;font-size:13px;margin:8px 0}
.footer-grid a:hover{color:#fff}
.footer-desc{font-size:13px;line-height:1.8;color:#aebfd3;max-width:270px}
.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:35px;padding-top:20px;font-size:12px;color:#91a8c2}
@media(max-width:1024px){
 .nav{gap:15px}.nav-links a{padding:8px 8px}
 .tool-index{grid-template-columns:repeat(3,1fr)}
 .index-item:nth-child(3){border-right:0}
 .index-item:nth-child(-n+3){border-bottom:1px solid var(--line)}
 .tools-wrap{grid-template-columns:1fr}
 .side-panel{position:static}
}
@media(max-width:768px){
 .container{width:min(var(--container),calc(100% - 28px))}
 .nav{height:66px}.menu-toggle{display:block;margin-left:auto}
 .nav-links{display:none;position:absolute;top:66px;left:14px;right:14px;padding:10px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:13px;flex-direction:column;align-items:stretch}
 .nav-links.open{display:flex}.nav-links a{padding:12px 14px}.nav-cta{text-align:center}
 .page-head{padding:45px 0}.page-head-grid{grid-template-columns:1fr;gap:28px}
 .page-head h1{font-size:39px}
 section{padding:55px 0}.section-head{display:block}.section-head p{margin-top:12px}
 .process-grid{grid-template-columns:1fr 1fr}
 .process-step:nth-child(2){border-right:0}.process-step:nth-child(-n+3){border-bottom:1px solid var(--line)}
 .scene-layout{grid-template-columns:1fr}.tips-grid{grid-template-columns:1fr 1fr}
 .article-grid{grid-template-columns:1fr}
 .cta-box{display:block;padding:30px}.cta-box .btn-primary{display:inline-block;margin-top:22px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
}
@media(max-width:520px){
 .tool-index{display:flex;overflow-x:auto}.index-item{min-width:145px;border-bottom:0!important}
 .tool-card{grid-template-columns:42px 1fr}.tool-icon{height:42px;width:42px}.tool-action{grid-column:2}
 .process-grid{grid-template-columns:1fr}.process-step{border-right:0!important;border-bottom:1px solid var(--line)}
 .scene-points,.tips-grid{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:1fr}
 .page-head h1{font-size:34px}
 .head-visual,.head-visual img{min-height:230px;height:230px}
}

/* roulang page: category2 */
:root{
 --blue:#2563b8;--blue-dark:#174985;--blue-light:#eaf4ff;--cyan:#dff7f7;
 --orange:#f08a45;--coral:#fff0e8;--ink:#172b4d;--muted:#66758c;
 --line:#dce6f1;--bg:#f6f9fc;--white:#fff;
 --shadow:0 14px 36px rgba(26,73,125,.09);--radius:18px;--container:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;border:0;cursor:pointer}
.container{width:min(var(--container),calc(100% - 40px));margin: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{height:76px;display:flex;align-items:center;gap:28px}
.logo{font-size:21px;font-weight:800;color:var(--blue-dark);letter-spacing:-.5px;white-space:nowrap}
.logo b{color:var(--orange)}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links a{padding:9px 13px;border-radius:9px;color:#53647b;font-size:14px;transition:.2s}
.nav-links a:hover,.nav-links a.active{background:var(--blue-light);color:var(--blue);font-weight:700}
.nav-cta,.btn-primary{background:var(--blue);color:#fff!important;padding:11px 19px;border-radius:9px;font-weight:700;box-shadow:0 8px 18px rgba(37,99,184,.18);transition:.2s}
.nav-cta:hover,.btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px)}
.menu-toggle{display:none;background:var(--blue-light);color:var(--blue);padding:9px 12px;border-radius:8px}
.page-intro{padding:64px 0 54px;background:linear-gradient(115deg,#eef7ff,#fff 58%,#f5fbff)}
.intro-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:58px;align-items:center}
.eyebrow,.section-kicker{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:1.5px}
.page-intro h1{font-size:clamp(34px,4.2vw,56px);line-height:1.2;letter-spacing:-2px;margin:15px 0 19px}
.page-intro h1 span{color:var(--blue)}
.page-intro p{font-size:17px;color:var(--muted);max-width:680px;margin:0}
.intro-visual{min-height:285px;border-radius:20px;overflow:hidden;position:relative;background:linear-gradient(0deg,rgba(15,43,78,.82),rgba(15,43,78,.08)),url('/assets/images/525d6143569e38eb.jpg') center/cover;box-shadow:var(--shadow)}
.visual-caption{position:absolute;left:25px;right:25px;bottom:23px;color:#fff}
.visual-caption b{display:block;font-size:23px;margin-bottom:5px}
.visual-caption small{color:#e4f0fb}
.topic-bar{padding:18px 0;background:#fff;border-bottom:1px solid var(--line)}
.topic-scroll{display:flex;gap:10px;overflow:auto;white-space:nowrap}
.topic-scroll a{padding:8px 15px;border:1px solid var(--line);border-radius:30px;color:#52657c;font-size:14px;background:#fff;transition:.2s}
.topic-scroll a:hover,.topic-scroll a.active{background:var(--blue-light);border-color:#b7d4ef;color:var(--blue);font-weight:700}
section{padding:72px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
.section-head h2{font-size:30px;line-height:1.3;margin:8px 0 0;letter-spacing:-.7px}
.section-head p{max-width:620px;color:var(--muted);margin:0}
.feature-strip{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:16px}
.feature-story,.topic-panel,.read-card,.step-card,.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.feature-story{overflow:hidden;display:grid;grid-template-columns:1fr 1fr;min-height:300px}
.feature-story img{height:100%;width:100%;object-fit:cover}
.feature-copy{padding:27px}
.feature-copy h3{font-size:23px;line-height:1.35;margin:10px 0}
.feature-copy p,.read-card p,.topic-panel p,.step-card p{color:var(--muted);font-size:14px;margin:0}
.tag{display:inline-block;background:var(--coral);color:#b65d2b;padding:4px 9px;border-radius:5px;font-size:12px;font-weight:700}
.mini-topic{padding:24px;display:flex;flex-direction:column;justify-content:space-between;min-height:300px}
.mini-topic h3{font-size:19px;line-height:1.4;margin:17px 0 8px}
.mini-topic .mini-icon{width:43px;height:43px;background:var(--blue-light);border-radius:12px;display:grid;place-items:center;color:var(--blue);font-weight:800;font-size:18px}
.read-layout{display:grid;grid-template-columns:1.5fr .75fr;gap:28px}
.read-list{display:grid;gap:12px}
.read-card{padding:21px 23px;display:grid;grid-template-columns:90px 1fr auto;gap:18px;align-items:start;transition:.22s}
.read-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#bcd5ec}
.read-card h3{margin:7px 0 5px;font-size:18px;line-height:1.4}
.read-card time,.read-card small{color:var(--muted);font-size:12px;white-space:nowrap}
.read-card .arrow{color:var(--blue);font-size:22px}
.sidebar{background:#eef7ff;border-radius:18px;padding:24px}
.sidebar h3{margin:0 0 15px;font-size:19px}
.sidebar a{display:block;padding:13px 0;border-bottom:1px solid #cbdff2;color:var(--blue-dark);font-weight:700;font-size:14px}
.sidebar a:last-child{border-bottom:0}
.alt-section{background:#fff}
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
.topic-panel{padding:23px;min-height:170px;transition:.2s}
.topic-panel:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.topic-panel h3{font-size:18px;margin:0 0 8px}
.topic-number{color:var(--blue);font-size:13px;font-weight:800}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.step-card{padding:22px 18px;position:relative}
.step-card strong{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;margin-bottom:15px}
.step-card h3{font-size:16px;margin:0 0 6px}
.step-card:not(:last-child):after{content:"";position:absolute;right:-13px;top:38px;width:14px;border-top:2px solid #bfd8ed}
.notice{margin-top:22px;padding:15px 18px;background:#fff8f1;border-left:3px solid var(--orange);color:#76563e;border-radius:8px;font-size:14px}
.faq{max-width:900px;margin:auto}
.faq details{margin-bottom:11px;padding:17px 20px}
.faq summary{cursor:pointer;font-weight:700;min-height:25px}
.faq details p{color:var(--muted);font-size:14px;margin:13px 0 0}
.cta-section{padding:60px 0}
.cta-box{background:linear-gradient(110deg,#e7f3ff,#f3fbff);border:1px solid #c7deef;border-radius:22px;padding:42px 45px;display:flex;justify-content:space-between;align-items:center;gap:25px}
.cta-box h2{margin:0 0 8px;font-size:29px}
.cta-box p{margin:0;color:var(--muted)}
.btn-secondary{background:#fff;border:1px solid #bcd0e6;color:var(--blue);padding:10px 18px;border-radius:9px;font-weight:700;transition:.2s}
.btn-secondary:hover{border-color:var(--blue);background:var(--blue-light);transform:translateY(-2px)}
.actions{display:flex;gap:12px;flex-wrap:wrap}
.site-footer{background:#142a48;color:#c8d6e8;padding:48px 0 25px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:35px}
.footer-logo{color:#fff;font-size:20px;font-weight:800}
.footer-grid h3{font-size:14px;color:#fff;margin:0 0 13px}
.footer-grid a{display:block;color:#b4c5da;font-size:13px;margin:8px 0}
.footer-grid a:hover{color:#fff}
.footer-desc{font-size:13px;color:#b4c5da;max-width:310px;margin:12px 0 0}
.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:35px;padding-top:20px;font-size:12px;color:#9db1c9}
:focus-visible{outline:3px solid rgba(37,99,184,.35);outline-offset:3px}
@media(max-width:1024px){
 .intro-grid{gap:30px}.feature-strip{grid-template-columns:1fr 1fr}.feature-story{grid-column:1/-1}
 .topic-grid{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:repeat(3,1fr)}
 .step-card:nth-child(3):after,.step-card:nth-child(5):after{display:none}
}
@media(max-width:768px){
 .container{width:min(var(--container),calc(100% - 28px))}
 .nav{height:68px}.menu-toggle{display:block;margin-left:auto}.nav-links{display:none;position:absolute;top:68px;left:14px;right:14px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:13px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
 .nav-links.open{display:flex}.nav-links a{padding:12px 14px}.nav-cta{text-align:center}
 .page-intro{padding:45px 0}.intro-grid,.read-layout{grid-template-columns:1fr}.intro-visual{min-height:250px}
 section{padding:55px 0}.section-head{display:block}.section-head p{margin-top:10px}
 .feature-strip{grid-template-columns:1fr}.feature-story{grid-column:auto;grid-template-columns:1fr}.feature-story img{height:210px}
 .read-card{grid-template-columns:72px 1fr auto;gap:11px}.steps{grid-template-columns:1fr 1fr}.step-card:after{display:none!important}
 .cta-box{display:block;padding:30px 24px}.cta-box .actions{margin-top:22px}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}
}
@media(max-width:520px){
 .logo{font-size:18px}.page-intro h1{font-size:34px}.page-intro p{font-size:15px}
 .topic-grid,.steps{grid-template-columns:1fr}.read-card{grid-template-columns:1fr}.read-card .arrow{display:none}
 .footer-grid{grid-template-columns:1fr}.section-head h2{font-size:25px}
}

/* roulang page: category3 */
:root{
 --blue:#2563b8;--blue-dark:#174985;--blue-light:#eaf4ff;--cyan:#dff7f7;
 --orange:#f08a45;--coral:#fff0e8;--ink:#172b4d;--muted:#66758c;
 --line:#dce6f1;--bg:#f6f9fc;--white:#fff;--shadow:0 14px 36px rgba(26,73,125,.09);
 --radius:18px;--container:1200px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;border:0;cursor:pointer}
.container{width:min(var(--container),calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.nav{height:76px;display:flex;align-items:center;gap:28px}
.logo{font-size:21px;font-weight:800;color:var(--blue-dark);letter-spacing:-.5px;white-space:nowrap}
.logo b{color:var(--orange)}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links a{padding:9px 13px;border-radius:9px;color:#53647b;font-size:14px;transition:.2s}
.nav-links a:hover,.nav-links a.active{background:var(--blue-light);color:var(--blue);font-weight:700}
.nav-cta,.btn-primary{background:var(--blue);color:#fff!important;padding:11px 19px;border-radius:9px;font-weight:700;box-shadow:0 8px 18px rgba(37,99,184,.18);transition:.2s}
.nav-cta:hover,.btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px)}
.menu-toggle{display:none;background:var(--blue-light);color:var(--blue);padding:9px 12px;border-radius:8px}
main{overflow:hidden}
.category-head{padding:70px 0 48px;background:linear-gradient(115deg,#eef7ff 0%,#fff 58%,#f8fbff 100%)}
.category-head-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:55px;align-items:center}
.eyebrow,.section-kicker{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:1.4px}
.category-head h1{font-size:clamp(34px,4.5vw,58px);line-height:1.18;letter-spacing:-2px;margin:16px 0 18px}
.category-head h1 span{color:var(--blue)}
.category-head p{font-size:17px;color:var(--muted);max-width:690px;margin:0 0 25px}
.head-tags,.filter-row{display:flex;flex-wrap:wrap;gap:9px}
.tag,.filter{display:inline-block;background:var(--coral);color:#b65d2b;padding:5px 10px;border-radius:6px;font-size:12px;font-weight:700}
.head-visual{height:300px;border-radius:20px;background:linear-gradient(0deg,rgba(10,38,73,.68),rgba(10,38,73,.05)),url('/assets/images/525d6143569e38eb.jpg') center/cover;position:relative;box-shadow:var(--shadow);overflow:hidden}
.visual-note{position:absolute;left:24px;bottom:22px;color:#fff}
.visual-note strong{font-size:24px;display:block}
.visual-note span{font-size:13px;color:#e5f1ff}
section{padding:72px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
.section-head h2{font-size:30px;line-height:1.3;margin:8px 0 0;letter-spacing:-.7px}
.section-head p{max-width:610px;color:var(--muted);margin:0}
.filter-section{padding-top:42px;background:#fff;border-bottom:1px solid var(--line)}
.filter-box{display:flex;align-items:center;gap:22px;overflow:auto;padding-bottom:42px}
.filter-label{font-weight:800;color:var(--blue-dark);white-space:nowrap}
.filter{background:#f2f6fa;color:#52677f;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:.2s;padding:8px 15px}
.filter:hover,.filter.active{background:var(--blue-light);border-color:#bcd5ed;color:var(--blue)}
.featured-case{display:grid;grid-template-columns:1.1fr .9fr;background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:var(--shadow)}
.featured-image{min-height:370px;background:linear-gradient(0deg,rgba(10,38,73,.72),rgba(10,38,73,.04)),url('/assets/images/b256174c88dbcbc3.jpg') center/cover;display:flex;align-items:end;padding:28px;color:#fff}
.featured-image h3{font-size:28px;line-height:1.3;margin:0}
.featured-content{padding:34px}
.featured-content h2{font-size:27px;line-height:1.35;margin:10px 0 14px}
.featured-content p{color:var(--muted);margin:0 0 20px}
.case-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:25px 0}
.meta-cell{padding:13px;background:var(--blue-light);border-radius:10px}
.meta-cell small{display:block;color:var(--muted);font-size:12px}
.meta-cell b{display:block;color:var(--blue-dark);font-size:14px;margin-top:4px}
.btn-secondary{display:inline-block;background:#fff;border:1px solid #bcd0e6;color:var(--blue);padding:10px 18px;border-radius:9px;font-weight:700;transition:.2s}
.btn-secondary:hover{border-color:var(--blue);background:var(--blue-light);transform:translateY(-2px)}
.case-stream{display:grid;grid-template-columns:1.25fr .75fr;gap:25px}
.case-list{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
.case-row{display:grid;grid-template-columns:150px 1fr;gap:20px;padding:20px;border-bottom:1px solid var(--line);transition:.2s}
.case-row:last-child{border-bottom:0}
.case-row:hover{background:var(--blue-light)}
.case-thumb{height:116px;border-radius:11px;object-fit:cover;width:100%}
.case-row h3{font-size:18px;margin:4px 0 7px}
.case-row p{font-size:13px;color:var(--muted);margin:0}
.case-row small{color:var(--blue);font-weight:700}
.rank-panel{background:#142a48;color:#dbe9f8;border-radius:17px;padding:25px}
.rank-panel h3{margin:0 0 17px;color:#fff;font-size:20px}
.rank-item{display:grid;grid-template-columns:30px 1fr;gap:10px;padding:15px 0;border-bottom:1px solid rgba(255,255,255,.15)}
.rank-item:last-child{border:0}
.rank-num{color:#ffbd8e;font-weight:800;font-size:20px}
.rank-item b{display:block;color:#fff;font-size:14px}
.rank-item span{font-size:12px;color:#a9c1d8}
.breakdown-section{background:#fff}
.breakdown-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.breakdown-step{position:relative;padding:22px 16px;background:var(--bg);border:1px solid var(--line);border-radius:13px}
.breakdown-step:not(:last-child):after{content:"→";position:absolute;right:-17px;top:42px;color:var(--blue);font-size:22px;font-weight:700;z-index:2}
.step-num{color:var(--blue);font-weight:800;font-size:13px}
.breakdown-step h3{font-size:16px;margin:9px 0 5px}
.breakdown-step p{font-size:13px;color:var(--muted);margin:0}
.scene-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:26px;align-items:stretch}
.scene-photo{min-height:340px;border-radius:18px;background:linear-gradient(0deg,rgba(10,38,73,.67),rgba(10,38,73,.08)),url('/assets/images/f703949c49ec76e0.jpg') center/cover;padding:27px;display:flex;align-items:end;color:#fff}
.scene-photo h3{font-size:25px;line-height:1.35;margin:0}
.scene-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.scene-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;transition:.2s}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.scene-card b{display:block;color:var(--blue-dark);font-size:16px;margin-bottom:7px}
.scene-card p{font-size:13px;color:var(--muted);margin:0}
.template-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.template-card{padding:21px;background:#fff;border:1px solid var(--line);border-radius:14px}
.template-card .tag{background:var(--cyan);color:#277878}
.template-card h3{font-size:17px;margin:7px 0}
.template-card p{color:var(--muted);font-size:13px;margin:0}
.faq{max-width:850px;margin:auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:11px;padding:17px 20px}
.faq summary{cursor:pointer;font-weight:700;color:var(--ink);min-height:25px}
.faq summary:focus{outline:3px solid #c7e0fa;outline-offset:3px}
.faq details p{color:var(--muted);font-size:14px;margin:14px 0 0}
.reading-layout{display:grid;grid-template-columns:1fr .78fr;gap:25px}
.article-list{background:#fff;border:1px solid var(--line);border-radius:16px}
.article-item{display:flex;justify-content:space-between;gap:20px;padding:18px 21px;border-bottom:1px solid var(--line)}
.article-item:last-child{border:0}
.article-item h3{font-size:16px;margin:4px 0}
.article-item p{font-size:13px;color:var(--muted);margin:0}
.article-item time{font-size:12px;color:var(--muted);white-space:nowrap}
.tip-panel{padding:28px;border-radius:17px;background:var(--blue-light);border:1px solid #c8def2}
.tip-panel h3{margin:0 0 10px;color:var(--blue-dark)}
.tip-panel p{color:var(--muted);font-size:14px;margin:0 0 18px}
.cta-section{padding:60px 0}
.cta-box{background:linear-gradient(110deg,#e7f3ff,#f3fbff);border:1px solid #c7deef;border-radius:22px;padding:42px;display:flex;justify-content:space-between;align-items:center;gap:25px}
.cta-box h2{margin:0 0 8px;font-size:29px}
.cta-box p{margin:0;color:var(--muted)}
.site-footer{background:#142a48;color:#c8d6e8;padding:48px 0 25px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:35px}
.footer-logo{color:#fff;font-size:20px;font-weight:800}
.footer-grid h3{font-size:14px;color:#fff;margin:0 0 13px}
.footer-grid a{display:block;color:#b4c5da;font-size:13px;margin:8px 0}
.footer-grid a:hover{color:#fff}
.footer-desc{font-size:13px;line-height:1.8;color:#b4c5da;max-width:290px;margin:12px 0 0}
.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:35px;padding-top:20px;font-size:12px;color:#91a9c2}
@media(max-width:900px){
 .nav{height:68px}.nav-links{gap:2px}.nav-links a{padding:8px 9px;font-size:13px}
 .category-head-grid,.case-stream,.reading-layout{grid-template-columns:1fr}
 .breakdown-grid{grid-template-columns:repeat(3,1fr)}
 .breakdown-step:nth-child(3):after{display:none}
 .template-strip{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
 .container{width:min(100% - 28px,var(--container))}
 .nav{justify-content:space-between}.menu-toggle{display:block}
 .nav-links{display:none;position:absolute;top:68px;left:14px;right:14px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
 .nav-links.open{display:flex}.nav-links a{display:block;text-align:center}
 .category-head{padding:52px 0 38px}.category-head h1{font-size:38px}
 .head-visual{height:250px}.section-head{display:block}.section-head p{margin-top:12px}
 section{padding:56px 0}.featured-case{grid-template-columns:1fr}.featured-image{min-height:260px}
 .breakdown-grid{grid-template-columns:1fr 1fr}.breakdown-step:after{display:none!important}
 .scene-layout{grid-template-columns:1fr}.scene-photo{min-height:250px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
 .cta-box{display:block;padding:30px}.cta-box .btn-primary{display:inline-block;margin-top:20px}
}
@media(max-width:520px){
 .logo{font-size:18px}.category-head h1{font-size:32px}
 .category-head p{font-size:15px}.case-row{grid-template-columns:1fr}.case-thumb{height:170px}
 .case-meta{grid-template-columns:1fr}.scene-cards,.template-strip{grid-template-columns:1fr}
 .breakdown-grid{grid-template-columns:1fr}.article-item{display:block}.article-item time{display:block;margin-top:8px}
 .footer-grid{grid-template-columns:1fr}.copyright{line-height:1.6}
}