/* roulang page: index */
:root{--teal:#17645d;--teal-dark:#103f3b;--teal-soft:#dfeee9;--terracotta:#bd694e;--paper:#f5f3ee;--white:#fffdf9;--ink:#17302d;--muted:#6a7772;--line:#d8ded8;--radius:18px;--shadow:0 12px 30px rgba(21,54,49,.08);--max:1200px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer}img{max-width:100%;display:block}.container{width:min(var(--max),calc(100% - 48px));margin:auto}.site-header{height:78px;display:flex;align-items:center;background:rgba(245,243,238,.96);border-bottom:1px solid transparent;position:sticky;top:0;z-index:20;transition:.25s}.site-header.scrolled{border-color:var(--line);box-shadow:0 4px 18px rgba(16,63,59,.05)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.04em;font-size:19px;white-space:nowrap}.brand-mark{width:34px;height:34px;background:var(--teal);color:#fff;border-radius:9px;display:grid;place-items:center;font-size:14px}.nav{display:flex;align-items:center;gap:27px;margin-left:auto}.nav a{font-size:14px;color:#52635f;padding:26px 0;position:relative}.nav a:hover,.nav a.active{color:var(--teal-dark)}.nav a.active:after{content:"";height:3px;width:22px;background:var(--terracotta);position:absolute;bottom:16px;left:0;border-radius:4px}.menu-toggle{display:none;background:none;border:0;color:var(--teal);font-size:25px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border-radius:11px;border:1px solid transparent;font-weight:700;font-size:14px;transition:.2s}.btn-primary{background:var(--teal);color:#fff}.btn-primary:hover{background:var(--teal-dark);transform:translateY(-2px)}.btn-outline{border-color:#9db6ae;color:var(--teal);background:transparent}.btn-outline:hover{background:var(--teal-soft);transform:translateY(-2px)}.eyebrow{color:var(--terracotta);font-size:13px;font-weight:800;letter-spacing:.08em;margin-bottom:12px}.section{padding:92px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:34px}.section-head h2{font-size:34px;line-height:1.25;margin:0;letter-spacing:-.04em}.section-head p{color:var(--muted);margin:0;max-width:470px}.hero{padding:84px 0 76px;overflow:hidden;position:relative}.hero:before{content:"";position:absolute;right:-120px;top:15px;width:55%;height:440px;background:var(--teal-soft);border-radius:48% 0 0 48%;z-index:-1}.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.hero h1{font-size:52px;line-height:1.2;letter-spacing:-.06em;margin:0 0 22px;max-width:620px}.hero p{color:var(--muted);max-width:540px;margin:0 0 28px}.actions{display:flex;gap:12px;flex-wrap:wrap}.app-scene{height:400px;position:relative;display:flex;align-items:center;justify-content:center}.phone{width:205px;height:370px;border:9px solid var(--teal-dark);border-radius:30px;background:#fafcf9;box-shadow:var(--shadow);padding:23px 14px 13px;position:relative;z-index:2}.phone:before{content:"";position:absolute;top:8px;left:50%;transform:translateX(-50%);width:64px;height:5px;border-radius:4px;background:#315d57}.phone h3{font-size:17px;margin:5px 0 18px}.ui-chip{height:48px;background:var(--teal-soft);border-radius:10px;margin:10px 0;padding:9px;font-size:11px;color:var(--teal-dark)}.ui-line{height:9px;width:80%;background:#dfe5e0;border-radius:8px;margin:11px 0}.ui-line.short{width:48%}.ui-nav{position:absolute;bottom:12px;left:14px;right:14px;border-top:1px solid var(--line);padding-top:9px;display:flex;justify-content:space-around;color:var(--teal);font-size:11px}.phone.back{position:absolute;transform:translate(125px,24px) rotate(7deg);opacity:.68;z-index:1}.phone.back .ui-chip{background:#f1e4dc}.status-band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--white)}.status-grid{display:grid;grid-template-columns:repeat(4,1fr)}.status-item{padding:22px 20px;border-right:1px solid var(--line)}.status-item:last-child{border:0}.status-item small{display:block;color:var(--terracotta);font-weight:800;font-size:12px}.status-item strong{font-size:15px}.entry-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}.entry-card{background:var(--white);border:1px solid var(--line);padding:27px;border-radius:var(--radius);min-height:160px;transition:.2s;position:relative}.entry-card.tall{grid-row:span 2;min-height:340px;background:var(--teal);color:#fff}.entry-card:hover,.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.entry-card h3{margin:30px 0 8px;font-size:23px}.entry-card p{color:var(--muted);font-size:14px;margin:0;max-width:300px}.entry-card.tall p{color:#c8dfd9}.arrow{position:absolute;right:25px;top:26px;font-size:23px;color:var(--terracotta)}.download{background:var(--teal-soft)}.download-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:center}.device-stack{height:330px;position:relative}.device-stack .phone{position:absolute;left:110px;transform:rotate(-8deg);height:315px;width:175px}.mini-screen{position:absolute;left:0;top:34px;width:135px;height:205px;border:6px solid var(--teal);border-radius:17px;background:#fff;padding:17px 10px;box-shadow:var(--shadow);transform:rotate(5deg)}.download h2{font-size:35px;line-height:1.25;margin:0 0 15px}.download p{color:var(--muted)}.platform-tags{display:flex;gap:8px;flex-wrap:wrap;margin:21px 0}.tag,.badge{display:inline-flex;padding:4px 10px;border-radius:30px;background:#e9eee9;color:var(--teal-dark);font-size:12px;font-weight:700}.qr{width:90px;height:90px;border:1px dashed #83a79e;display:grid;place-items:center;color:var(--teal);font-size:12px;text-align:center;margin:20px 0}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:25px}.step{border-top:2px solid var(--teal);padding-top:17px}.step b{color:var(--terracotta);font-size:24px}.step h3{font-size:18px;margin:8px 0}.step p{color:var(--muted);font-size:14px;margin:0}.feature-grid{display:grid;grid-template-columns:1.15fr .85fr .85fr;gap:16px}.feature{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:25px;min-height:145px}.feature.large{grid-row:span 2;background:var(--teal-dark);color:#fff;min-height:305px}.feature h3{margin:16px 0 5px;font-size:19px}.feature p{font-size:14px;color:var(--muted);margin:0}.feature.large p{color:#c9ded8}.news-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px}.lead-news,.news-list{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:25px}.date-box{color:var(--terracotta);font-size:13px;font-weight:800}.lead-news h3{font-size:25px;line-height:1.4;margin:18px 0 10px}.lead-news p,.news-row p{color:var(--muted);font-size:14px}.news-row{padding:13px 0;border-bottom:1px solid var(--line)}.news-row:last-child{border:0}.news-row h3{font-size:16px;margin:3px 0}.news-row a,.lead-news a{color:var(--teal);font-weight:700;font-size:13px}.empty{padding:30px;color:var(--muted);text-align:center}.security{background:var(--teal-dark);color:#fff;padding:54px 0}.security-grid{display:grid;grid-template-columns:1fr 2fr;gap:60px;align-items:center}.security h2{font-size:32px;line-height:1.3;margin:0}.security p{color:#c3d8d2}.security-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.security-item{border-left:2px solid var(--terracotta);padding-left:16px}.security-item strong{display:block}.security-item span{font-size:14px;color:#bed2cd}.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0}.timeline-item{border-top:2px solid #9bb8b0;padding:20px 17px 0;position:relative}.timeline-item:before{content:"";width:11px;height:11px;background:var(--terracotta);border-radius:50%;position:absolute;top:-7px;left:16px}.timeline-item time{color:var(--terracotta);font-size:12px;font-weight:800}.timeline-item h3{font-size:17px;margin:8px 0}.timeline-item p{font-size:13px;color:var(--muted);margin:0}.guide-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:50px}.path{border-left:2px solid #a8c2ba;padding-left:25px}.path-item{position:relative;margin-bottom:22px}.path-item:before{content:"";position:absolute;left:-34px;top:6px;width:14px;height:14px;border:3px solid var(--teal);background:var(--paper);border-radius:50%}.path-item b{color:var(--terracotta);font-size:13px}.path-item h3{margin:2px 0;font-size:17px}.path-item p{margin:0;color:var(--muted);font-size:14px}.guide-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}.guide-card{padding:21px;background:var(--white);border:1px solid var(--line);border-radius:14px}.guide-card b{color:var(--terracotta)}.guide-card h3{font-size:16px;line-height:1.5;margin:16px 0 8px}.guide-card small{color:var(--muted)}.faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:60px}.faq-grid h2{font-size:33px;line-height:1.3;margin:0}.faq-grid p{color:var(--muted)}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;border:0;background:none;text-align:left;padding:18px 3px;display:flex;justify-content:space-between;font-weight:700;color:var(--ink)}.faq-q span{color:var(--terracotta);font-size:21px}.faq-a{display:none;padding:0 30px 17px 3px;color:var(--muted);font-size:14px}.faq-item.open .faq-a{display:block}.support{background:var(--white);border:1px solid var(--line);border-radius:22px;padding:42px}.support-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:60px}.support h2{font-size:32px;line-height:1.3;margin:0 0 12px}.support-intro{color:var(--muted)}.support-notes{margin-top:25px;padding-left:18px;border-left:2px solid var(--terracotta);color:var(--muted);font-size:14px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:700}.field input,.field select,.field textarea{width:100%;border:1px solid var(--line);background:#fbfaf6;border-radius:10px;padding:12px 13px;outline:0;color:var(--ink)}.field textarea{min-height:115px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(23,100,93,.12)}.privacy{font-size:12px;color:var(--muted);margin:12px 0}.site-footer{background:var(--teal-dark);color:#d6e5df;padding:55px 0 24px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:45px;padding-bottom:38px}.site-footer h3{color:#fff;margin:0 0 15px;font-size:18px}.site-footer p,.site-footer li{color:#abc4bc;font-size:14px}.site-footer ul{list-style:none;margin:0;padding:0;line-height:2.2}.copyright{border-top:1px solid rgba(214,229,223,.2);padding-top:20px;color:#91afa6;font-size:12px;display:flex;justify-content:space-between;gap:20px}.floating{position:fixed;right:20px;bottom:20px;background:var(--terracotta);color:#fff;padding:11px 15px;border-radius:10px;font-size:13px;font-weight:700;box-shadow:var(--shadow)}
@media(max-width:960px){.nav{gap:15px}.hero-grid,.download-grid,.support-grid{gap:35px}.hero h1{font-size:43px}.feature-grid{grid-template-columns:1fr 1fr}.feature.large{grid-row:auto;grid-column:1/-1}.footer-grid{grid-template-columns:1fr 1fr}.security-grid{gap:30px}}
@media(max-width:768px){.container{width:min(100% - 32px,var(--max))}.site-header{height:68px}.menu-toggle{display:block}.nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--paper);padding:12px 20px 20px;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;gap:0}.nav.show{display:flex}.nav a{padding:9px 0}.nav a.active:after{bottom:2px}.header-inner>.btn{display:none}.hero{padding:58px 0}.hero-grid,.download-grid,.news-wrap,.guide-grid,.faq-grid,.support-grid{grid-template-columns:1fr}.hero:before{width:100%;height:300px;top:380px;right:-35%}.hero h1{font-size:36px}.app-scene{margin-top:20px}.status-grid{grid-template-columns:repeat(2,1fr)}.status-item:nth-child(2){border:0}.section{padding:62px 0}.section-head{display:block}.section-head h2{font-size:29px;margin-bottom:10px}.steps,.timeline{grid-template-columns:1fr 1fr}.security-grid{grid-template-columns:1fr}.support{padding:25px}.guide-cards{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.brand{font-size:16px}.brand-mark{width:30px;height:30px}.status-grid,.feature-grid,.security-list,.steps,.timeline,.form-grid{grid-template-columns:1fr}.status-item{border-right:0;border-bottom:1px solid var(--line)}.status-item:last-child{border-bottom:0}.app-scene{transform:scale(.85);margin-left:-20px;margin-right:-20px}.phone.back{transform:translate(100px,24px) rotate(7deg)}.actions .btn{width:100%}.footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}.section-head h2{font-size:27px}}

/* roulang page: category1 */
:root{--teal:#17645d;--teal-dark:#103f3b;--teal-soft:#dfeee9;--terracotta:#bd694e;--paper:#f5f3ee;--white:#fffdf9;--ink:#17302d;--muted:#6a7772;--line:#d8ded8;--radius:18px;--radius-sm:11px;--shadow:0 12px 30px rgba(21,54,49,.08);--max:1200px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:3px solid rgba(189,105,78,.45);outline-offset:3px}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
img{display:block;max-width:100%}
.container{width:min(var(--max),calc(100% - 48px));margin:auto}
.site-header{height:78px;display:flex;align-items:center;background:rgba(245,243,238,.97);border-bottom:1px solid transparent;position:sticky;top:0;z-index:30;transition:.25s}
.site-header.scrolled{border-color:var(--line);box-shadow:0 4px 18px rgba(16,63,59,.05)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:30px;width:100%}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.04em;font-size:19px;white-space:nowrap}
.brand-mark{width:34px;height:34px;border-radius:9px;background:var(--teal);color:#fff;display:grid;place-items:center;font-size:14px;letter-spacing:0}
.nav{display:flex;align-items:center;gap:27px;margin-left:auto}
.nav a{font-size:14px;color:#52635f;padding:26px 0;position:relative;transition:color .2s}
.nav a:hover,.nav a.active{color:var(--teal-dark)}
.nav a.active:after{content:"";height:3px;width:22px;background:var(--terracotta);position:absolute;bottom:16px;left:0;border-radius:4px}
.header-actions{display:flex;align-items:center;gap:16px}
.menu-toggle{display:none;border:0;background:none;color:var(--teal);font-size:25px;line-height:1}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border:1px solid transparent;border-radius:11px;font-size:14px;font-weight:700;transition:transform .2s,background .2s,border-color .2s,color .2s}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-dark);color:#fff;transform:translateY(-2px)}
.btn-outline{background:transparent;border-color:#9db6ae;color:var(--teal)}
.btn-outline:hover{background:var(--teal-soft);color:var(--teal-dark);transform:translateY(-2px)}
.btn-light{background:var(--white);color:var(--teal-dark)}
.btn-light:hover{background:#e9f1ed;color:var(--teal-dark);transform:translateY(-2px)}
.notice-bar{border-bottom:1px solid var(--line);background:#edf2ee;color:#45625c}
.notice-inner{min-height:40px;display:flex;align-items:center;gap:10px;font-size:13px}
.notice-dot{width:7px;height:7px;border-radius:50%;background:var(--terracotta);flex:none}
.notice-inner a{font-weight:700;color:var(--teal);transition:color .2s}
.notice-inner a:hover{color:var(--teal-dark)}
main{overflow:hidden}
.section{padding:86px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:34px}
.section-head h2{margin:0;font-size:34px;line-height:1.25;letter-spacing:-.045em}
.section-head p{max-width:500px;margin:0;color:var(--muted);font-size:15px}
.eyebrow{margin:0 0 11px;color:var(--terracotta);font-size:13px;font-weight:800;letter-spacing:.08em}
.page-intro{padding:68px 0 56px;position:relative;background:var(--paper)}
.page-intro:after{content:"";position:absolute;right:-80px;bottom:-130px;width:350px;height:350px;border:1px solid rgba(23,100,93,.14);border-radius:50%;box-shadow:0 0 0 28px rgba(23,100,93,.035),0 0 0 57px rgba(23,100,93,.025)}
.breadcrumb{position:relative;z-index:1;display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:26px;color:var(--muted);font-size:13px}
.breadcrumb a{color:var(--teal);font-weight:700}
.breadcrumb span{color:#9aa7a2}
.page-intro-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.25fr .75fr;gap:50px;align-items:end}
.page-intro h1{margin:0 0 18px;font-size:50px;line-height:1.16;letter-spacing:-.065em}
.page-intro p{max-width:700px;margin:0;color:var(--muted);font-size:17px}
.update-box{padding:22px 24px;border:1px solid var(--line);border-radius:var(--radius);background:var(--white);box-shadow:var(--shadow)}
.update-box small{display:block;margin-bottom:5px;color:var(--terracotta);font-weight:800;font-size:12px;letter-spacing:.06em}
.update-box strong{display:block;font-size:18px;line-height:1.45}
.update-box span{display:block;margin-top:4px;color:var(--muted);font-size:13px}
.highlight-wrap{padding-top:0}
.highlight{display:grid;grid-template-columns:auto 1fr auto;gap:22px;align-items:center;padding:20px 26px;background:var(--teal-dark);color:#fff;border-radius:var(--radius)}
.date-block{display:grid;place-items:center;width:62px;min-height:62px;border-radius:12px;background:rgba(255,255,255,.12);font-weight:800;line-height:1.2;text-align:center}
.date-block strong{font-size:22px}
.date-block span{font-size:11px;color:#bed2cd}
.highlight-content small{display:block;color:#eab6a3;font-size:12px;font-weight:800;letter-spacing:.07em}
.highlight-content h2{margin:3px 0 0;font-size:19px;line-height:1.45}
.highlight-content p{margin:2px 0 0;color:#c8dfd9;font-size:14px}
.highlight-arrow{font-size:24px;color:#eab6a3}
.news-layout{display:grid;grid-template-columns:180px 1fr;gap:55px}
.news-aside{padding-top:11px}
.news-aside h2{margin:0 0 12px;font-size:30px;line-height:1.3;letter-spacing:-.04em}
.news-aside p{margin:0;color:var(--muted);font-size:14px}
.news-track{position:relative;padding-left:40px}
.news-track:before{content:"";position:absolute;top:6px;bottom:6px;left:7px;width:1px;background:#b8cec6}
.news-item{position:relative;display:grid;grid-template-columns:100px 1fr auto;gap:22px;align-items:start;padding:0 0 35px}
.news-item:before{content:"";position:absolute;left:-38px;top:9px;width:11px;height:11px;border:3px solid var(--paper);border-radius:50%;background:var(--terracotta);box-shadow:0 0 0 1px #9eb9b0}
.news-item:last-child{padding-bottom:0}
.news-date{padding-top:3px;color:var(--terracotta);font-size:13px;font-weight:800}
.news-body{padding:23px 25px;border:1px solid var(--line);border-radius:var(--radius);background:var(--white);transition:transform .2s,box-shadow .2s}
.news-item:hover .news-body{transform:translateY(-3px);box-shadow:var(--shadow)}
.badge{display:inline-flex;align-items:center;min-height:24px;padding:3px 10px;border-radius:30px;background:#e9eee9;color:var(--teal-dark);font-size:12px;font-weight:800;line-height:1.2}
.badge.orange{background:#f4e4dc;color:#98523d}
.badge.dark{background:var(--teal-soft);color:var(--teal-dark)}
.news-body h3{margin:11px 0 8px;font-size:21px;line-height:1.4;letter-spacing:-.025em}
.news-body p{margin:0;color:var(--muted);font-size:14px;line-height:1.8}
.text-link{display:inline-flex;align-items:center;gap:7px;margin-top:15px;color:var(--teal);font-size:14px;font-weight:800;transition:gap .2s,color .2s}
.text-link:hover{gap:11px;color:var(--teal-dark)}
.filter-section{padding:58px 0;background:#ecefe9;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.filter-row{display:flex;align-items:center;justify-content:space-between;gap:28px}
.filter-row h2{margin:0;font-size:26px;line-height:1.35;letter-spacing:-.04em}
.filters{display:flex;flex-wrap:wrap;gap:10px}
.filter{border:1px solid var(--line);border-radius:999px;background:var(--white);color:#5d6d67;padding:8px 15px;font-size:13px;font-weight:700;transition:.2s}
.filter:hover,.filter.active{border-color:var(--teal);background:var(--teal);color:#fff}
.featured-card{display:grid;grid-template-columns:190px 1fr auto;gap:32px;align-items:center;padding:32px;background:var(--white);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}
.featured-visual{min-height:145px;border-radius:14px;background:var(--teal-soft);position:relative;overflow:hidden;padding:22px}
.featured-visual:before,.featured-visual:after{content:"";position:absolute;border:1px solid rgba(23,100,93,.22);border-radius:50%}
.featured-visual:before{width:150px;height:150px;right:-48px;bottom:-55px}
.featured-visual:after{width:92px;height:92px;right:20px;top:-40px}
.featured-visual b{position:relative;z-index:1;display:block;color:var(--teal);font-size:13px;letter-spacing:.08em}
.featured-visual strong{position:relative;z-index:1;display:block;margin-top:22px;color:var(--teal-dark);font-size:34px;line-height:1}
.featured-copy h2{margin:10px 0 8px;font-size:26px;line-height:1.35;letter-spacing:-.04em}
.featured-copy p{margin:0;color:var(--muted);font-size:15px}
.entry-grid{display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:16px}
.entry-card{position:relative;min-height:220px;padding:27px;border:1px solid var(--line);border-radius:var(--radius);background:var(--white);overflow:hidden;transition:transform .2s,box-shadow .2s,border-color .2s}
.entry-card:hover{border-color:#aac1ba;box-shadow:var(--shadow);transform:translateY(-4px)}
.entry-card.primary{background:var(--teal);border-color:var(--teal);color:#fff}
.entry-card:after{content:"";position:absolute;right:-30px;bottom:-45px;width:150px;height:150px;border:1px solid rgba(23,100,93,.12);border-radius:50%}
.entry-card.primary:after{border-color:rgba(255,255,255,.17)}
.entry-card .entry-number{position:relative;z-index:1;color:var(--terracotta);font-size:13px;font-weight:800;letter-spacing:.09em}
.entry-card.primary .entry-number{color:#f2b8a2}
.entry-card h3{position:relative;z-index:1;margin:30px 0 8px;font-size:24px;line-height:1.3}
.entry-card p{position:relative;z-index:1;max-width:225px;margin:0;color:var(--muted);font-size:14px}
.entry-card.primary p{color:#c8dfd9}
.entry-arrow{position:absolute;z-index:1;right:25px;bottom:22px;color:var(--terracotta);font-size:24px}
.support-section{padding:78px 0;background:var(--teal-dark);color:#fff}
.support-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:center}
.support-grid h2{margin:0 0 13px;font-size:35px;line-height:1.25;letter-spacing:-.045em}
.support-grid p{margin:0;color:#c7dcd6}
.support-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.support-item{padding:15px 0 15px 16px;border-left:2px solid var(--terracotta)}
.support-item strong{display:block;font-size:15px}
.support-item span{display:block;margin-top:3px;color:#b9d0c9;font-size:13px;line-height:1.65}
.site-footer{padding:58px 0 24px;background:#142c29;color:#d4e2de}
.footer-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr;gap:55px;padding-bottom:45px}
.site-footer h3{margin:0 0 13px;color:#fff;font-size:16px}
.site-footer p{max-width:290px;margin:0;color:#aebfba;font-size:14px}
.site-footer ul{margin:0;padding:0;list-style:none}
.site-footer li{margin:7px 0;color:#b7c7c2;font-size:14px}
.copyright{display:flex;justify-content:space-between;gap:20px;padding-top:22px;border-top:1px solid rgba(211,230,222,.15);color:#91aaa2;font-size:13px}
@media(max-width:960px){
.nav{gap:18px}
.page-intro-grid,.support-grid{grid-template-columns:1fr;gap:28px}
.update-box{max-width:450px}
.news-layout{grid-template-columns:1fr;gap:28px}
.news-aside{display:flex;align-items:end;justify-content:space-between;gap:25px}
.news-aside p{max-width:360px}
.featured-card{grid-template-columns:160px 1fr}
.featured-card .btn{grid-column:2}
.entry-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:768px){
.container{width:min(var(--max),calc(100% - 32px))}
.site-header{height:70px}
.header-inner{gap:14px}
.brand{font-size:16px}
.brand-mark{width:31px;height:31px}
.menu-toggle{display:block}
.header-actions .btn{display:none}
.nav{display:none;position:absolute;top:70px;left:0;right:0;margin:0;padding:10px 24px 18px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:0 12px 22px rgba(16,63,59,.06);flex-direction:column;align-items:flex-start;gap:0}
.nav.open{display:flex}
.nav a{width:100%;padding:12px 0}
.nav a.active:after{bottom:7px}
.notice-inner{font-size:12px}
.section{padding:60px 0}
.page-intro{padding:48px 0 42px}
.page-intro h1{font-size:37px}
.page-intro p{font-size:16px}
.section-head{display:block;margin-bottom:26px}
.section-head h2{font-size:29px}
.section-head p{margin-top:10px}
.highlight{grid-template-columns:auto 1fr;gap:15px;padding:18px}
.highlight-arrow{display:none}
.news-item{grid-template-columns:1fr;gap:8px;padding-bottom:27px}
.news-date{padding-left:0}
.news-body{padding:21px}
.news-track{padding-left:29px}
.news-item:before{left:-27px}
.filter-row{display:block}
.filters{margin-top:16px}
.featured-card{grid-template-columns:1fr;gap:21px;padding:22px}
.featured-visual{min-height:115px}
.featured-card .btn{grid-column:auto;justify-self:start}
.entry-grid{grid-template-columns:1fr}
.entry-card{min-height:180px}
.support-grid{gap:35px}
.footer-grid{grid-template-columns:1fr 1fr;gap:30px}
.footer-grid>div:first-child{grid-column:span 2}
}
@media(max-width:520px){
body{font-size:15px}
.page-intro h1{font-size:32px}
.update-box{padding:19px}
.highlight-content h2{font-size:16px}
.highlight-content p{font-size:13px}
.news-aside{display:block}
.news-aside h2{font-size:27px}
.news-aside p{margin-top:8px}
.news-body h3{font-size:19px}
.featured-copy h2{font-size:23px}
.support-grid h2{font-size:29px}
.support-list{grid-template-columns:1fr}
.copyright{display:block}
.copyright span{display:block;margin:5px 0}
.footer-grid{grid-template-columns:1fr}
.footer-grid>div:first-child{grid-column:auto}
}

/* roulang page: article */
:root{
      --teal:#17645d;--teal-dark:#103f3b;--teal-soft:#dfeee9;
      --terracotta:#bd694e;--paper:#f5f3ee;--white:#fffdf9;
      --ink:#17302d;--muted:#6a7772;--line:#d8ded8;
      --radius:18px;--shadow:0 12px 30px rgba(21,54,49,.08);--max:1200px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}
    a{color:inherit;text-decoration:none}
    a:focus-visible,button:focus-visible{outline:3px solid rgba(189,105,78,.45);outline-offset:3px}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    img{max-width:100%;display:block}
    .container{width:min(var(--max),calc(100% - 48px));margin:auto}
    .site-header{height:78px;display:flex;align-items:center;background:rgba(245,243,238,.96);border-bottom:1px solid transparent;position:sticky;top:0;z-index:20;transition:.25s}
    .site-header.scrolled{border-color:var(--line);box-shadow:0 4px 18px rgba(16,63,59,.05)}
    .header-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.04em;font-size:19px;white-space:nowrap}
    .brand-mark{width:34px;height:34px;background:var(--teal);color:#fff;border-radius:9px;display:grid;place-items:center;font-size:14px}
    .nav{display:flex;align-items:center;gap:27px;margin-left:auto}
    .nav a{font-size:14px;color:#52635f;padding:26px 0;position:relative}
    .nav a:hover,.nav a.active{color:var(--teal-dark)}
    .nav a.active:after{content:"";height:3px;width:22px;background:var(--terracotta);position:absolute;bottom:16px;left:0;border-radius:4px}
    .menu-toggle{display:none;background:none;border:0;color:var(--teal);font-size:25px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border-radius:11px;border:1px solid transparent;font-weight:700;font-size:14px;transition:.2s}
    .btn-primary{background:var(--teal);color:#fff}
    .btn-primary:hover{background:var(--teal-dark);transform:translateY(-2px);color:#fff}
    .btn-outline{border-color:#9db6ae;color:var(--teal);background:transparent}
    .btn-outline:hover{background:var(--teal-soft);transform:translateY(-2px)}
    .eyebrow{color:var(--terracotta);font-size:13px;font-weight:800;letter-spacing:.08em;margin-bottom:12px}
    .section{padding:78px 0}
    .article-head{padding:62px 0 48px;background:var(--white);border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:28px}
    .breadcrumb a:hover{color:var(--teal)}
    .breadcrumb .current{max-width:500px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .article-head-grid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:60px;align-items:end}
    .article-head h1{font-size:clamp(34px,5vw,54px);line-height:1.25;letter-spacing:-.055em;margin:0 0 20px;max-width:850px}
    .article-summary{font-size:17px;color:var(--muted);max-width:780px;margin:0}
    .article-meta{display:flex;flex-wrap:wrap;gap:10px 20px;color:var(--muted);font-size:13px;border-left:2px solid var(--terracotta);padding-left:18px}
    .article-meta strong{display:block;color:var(--ink);font-size:14px}
    .reading-layout{display:grid;grid-template-columns:220px minmax(0,800px);gap:64px;align-items:start}
    .toc{position:sticky;top:108px;background:var(--white);border:1px solid var(--line);border-radius:16px;padding:22px}
    .toc h2{font-size:15px;margin:0 0 13px;color:var(--teal-dark)}
    .toc p{font-size:13px;color:var(--muted);margin:0}
    .toc-line{height:1px;background:var(--line);margin:14px 0}
    .article-body{background:var(--white);border:1px solid var(--line);border-radius:20px;padding:clamp(26px,5vw,58px)}
    .article-body>*:first-child{margin-top:0}
    .article-body h2{font-size:30px;line-height:1.35;margin:42px 0 16px;letter-spacing:-.035em;color:var(--teal-dark)}
    .article-body h3{font-size:21px;line-height:1.45;margin:30px 0 12px;color:var(--ink)}
    .article-body p{margin:0 0 20px;color:#3c504c}
    .article-body ul,.article-body ol{padding-left:25px;margin:0 0 22px;color:#3c504c}
    .article-body li{margin:7px 0}
    .article-body blockquote{margin:28px 0;padding:18px 22px;border-left:4px solid var(--terracotta);background:#f3e8e2;color:var(--teal-dark);border-radius:0 12px 12px 0}
    .article-body img{border-radius:14px;margin:26px auto}
    .article-body table{width:100%;border-collapse:collapse;margin:24px 0;display:block;overflow-x:auto}
    .article-body th,.article-body td{padding:12px 15px;border:1px solid var(--line);white-space:nowrap;text-align:left}
    .article-body th{background:var(--teal-soft);color:var(--teal-dark)}
    .empty-state{text-align:center;padding:60px 20px;background:var(--white);border:1px solid var(--line);border-radius:20px}
    .empty-icon{width:52px;height:52px;border:1px solid #9db6ae;border-radius:14px;display:grid;place-items:center;margin:0 auto 15px;color:var(--teal);font-size:24px}
    .empty-state h2{font-size:25px;margin:0 0 8px}
    .empty-state p{color:var(--muted);margin:0 0 22px}
    .notice-box{background:var(--teal-soft);border:1px solid #c5ddd5;border-radius:16px;padding:24px 28px;display:flex;justify-content:space-between;align-items:center;gap:25px}
    .notice-box h2{font-size:20px;margin:0 0 5px;color:var(--teal-dark)}
    .notice-box p{margin:0;color:#4f6862;font-size:14px}
    .article-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .nav-card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:22px;transition:.2s}
    .nav-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#9db6ae}
    .nav-card.next{text-align:right}
    .nav-card small{display:block;color:var(--terracotta);font-weight:800;font-size:12px;margin-bottom:7px}
    .nav-card strong{font-size:16px;line-height:1.5}
    .related-grid{display:grid;grid-template-columns:1.25fr .875fr .875fr;gap:16px}
    .related-card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:23px;min-height:180px;transition:.2s}
    .related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .related-card.featured{background:var(--teal-dark);color:#fff}
    .related-card .tag{display:inline-flex;padding:4px 10px;border-radius:30px;background:#e9eee9;color:var(--teal-dark);font-size:12px;font-weight:700}
    .related-card.featured .tag{background:#d8ebe5}
    .related-card h3{font-size:19px;line-height:1.45;margin:18px 0 9px}
    .related-card p{font-size:14px;color:var(--muted);margin:0 0 15px}
    .related-card.featured p{color:#c7dbd5}
    .related-card a.more{color:var(--teal);font-size:13px;font-weight:800}
    .related-card.featured a.more{color:#fff}
    .support-bar{background:var(--teal-dark);color:#fff;padding:33px 0}
    .support-inner{display:flex;align-items:center;justify-content:space-between;gap:25px}
    .support-inner h2{font-size:24px;margin:0 0 5px}
    .support-inner p{margin:0;color:#c8ddd7;font-size:14px}
    .site-footer{background:#0c302e;color:#d9e7e2;padding:58px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:50px;padding-bottom:42px}
    .site-footer h3{font-size:16px;color:#fff;margin:0 0 15px}
    .site-footer p{color:#abc3bc;font-size:14px;margin:0;max-width:270px}
    .site-footer ul{list-style:none;padding:0;margin:0}
    .site-footer li{color:#abc3bc;font-size:14px;margin:5px 0}
    .copyright{border-top:1px solid rgba(217,231,226,.16);padding-top:17px;display:flex;justify-content:space-between;gap:15px;color:#8eaaa2;font-size:12px}
    @media(max-width:960px){
      .nav{gap:16px}.article-head-grid{grid-template-columns:1fr;gap:25px}
      .reading-layout{grid-template-columns:1fr;gap:25px}.toc{position:static}
      .related-grid{grid-template-columns:1fr 1fr}
      .related-card.featured{grid-column:span 2}
    }
    @media(max-width:768px){
      .container{width:min(var(--max),calc(100% - 34px))}
      .site-header{height:68px}.header-inner{gap:12px}.brand{font-size:16px}
      .brand-mark{width:31px;height:31px}.nav{display:none;position:absolute;top:68px;left:0;right:0;margin:0;padding:12px 22px 18px;background:var(--white);border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:flex-start;gap:0}
      .nav.open{display:flex}.nav a{padding:10px 0;width:100%}.nav a.active:after{bottom:5px}
      .menu-toggle{display:block}.header-inner>.btn{display:none}
      .article-head{padding:42px 0 35px}.article-head h1{font-size:35px}
      .section{padding:52px 0}.article-body{padding:25px 20px}.article-body h2{font-size:26px}
      .notice-box,.support-inner{align-items:flex-start;flex-direction:column}
      .article-nav,.related-grid{grid-template-columns:1fr}.related-card.featured{grid-column:auto}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-grid>div:first-child{grid-column:span 2}
      .copyright{flex-direction:column;gap:4px}
    }
    @media(max-width:480px){
      .brand{font-size:14px}.breadcrumb{font-size:12px}.article-meta{display:block}
      .article-meta span{display:block;margin-bottom:7px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}
      .btn{width:100%}
    }

/* roulang page: category2 */
:root{--teal:#17645d;--teal-dark:#103f3b;--teal-soft:#dfeee9;--terracotta:#bd694e;--paper:#f5f3ee;--white:#fffdf9;--ink:#17302d;--muted:#6a7772;--line:#d8ded8;--radius:18px;--shadow:0 12px 30px rgba(21,54,49,.08);--max:1200px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
img{max-width:100%;display:block}
.container{width:min(var(--max),calc(100% - 48px));margin:auto}
.site-header{height:78px;display:flex;align-items:center;background:rgba(245,243,238,.96);border-bottom:1px solid transparent;position:sticky;top:0;z-index:20;transition:.25s}
.site-header.scrolled{border-color:var(--line);box-shadow:0 4px 18px rgba(16,63,59,.05)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:30px;width:100%}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.04em;font-size:19px;white-space:nowrap}
.brand-mark{width:34px;height:34px;background:var(--teal);color:#fff;border-radius:9px;display:grid;place-items:center;font-size:14px}
.nav{display:flex;align-items:center;gap:27px;margin-left:auto}
.nav a{font-size:14px;color:#52635f;padding:26px 0;position:relative}
.nav a:hover,.nav a.active{color:var(--teal-dark)}
.nav a.active:after{content:"";height:3px;width:22px;background:var(--terracotta);position:absolute;bottom:16px;left:0;border-radius:4px}
.menu-toggle{display:none;background:none;border:0;color:var(--teal);font-size:25px;padding:6px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border-radius:11px;border:1px solid transparent;font-weight:700;font-size:14px;transition:.2s}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-dark);transform:translateY(-2px);color:#fff}
.btn-outline{border-color:#9db6ae;color:var(--teal);background:transparent}
.btn-outline:hover{background:var(--teal-soft);transform:translateY(-2px)}
.btn:focus-visible,.nav a:focus-visible,.faq-question:focus-visible{outline:3px solid rgba(189,105,78,.42);outline-offset:3px}
.notice-bar{background:#edf2ee;border-bottom:1px solid var(--line);font-size:13px;color:#49605a}
.notice-bar .container{min-height:40px;display:flex;align-items:center;gap:10px}
.notice-dot{width:7px;height:7px;background:var(--terracotta);border-radius:50%;flex:0 0 auto}
.notice-bar a{font-weight:700;color:var(--teal)}
.section{padding:92px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:34px}
.section-head h2{font-size:34px;line-height:1.25;margin:0;letter-spacing:-.04em}
.section-head p{color:var(--muted);margin:0;max-width:480px}
.eyebrow{color:var(--terracotta);font-size:13px;font-weight:800;letter-spacing:.08em;margin-bottom:12px}
.badge,.tag{display:inline-flex;align-items:center;padding:4px 10px;border-radius:30px;background:#e9eee9;color:var(--teal-dark);font-size:12px;font-weight:700;line-height:1.5}
.tag.orange{color:#91452f;background:#f4e5df}
.tag.dark{color:#dcece7;background:rgba(255,255,255,.12)}
.page-intro{padding:64px 0 52px;position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.page-intro:after{content:"";position:absolute;width:430px;height:430px;right:-150px;top:-210px;border:1px solid #c9ddd6;border-radius:50%;box-shadow:0 0 0 42px rgba(223,238,233,.52),0 0 0 84px rgba(223,238,233,.28)}
.breadcrumb{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:13px;margin-bottom:24px;position:relative;z-index:1}
.breadcrumb span:last-child{color:var(--teal);font-weight:700}
.intro-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:60px;align-items:end;position:relative;z-index:1}
.page-intro h1{font-size:50px;line-height:1.18;letter-spacing:-.06em;margin:0 0 17px}
.page-intro p{max-width:700px;color:var(--muted);margin:0;font-size:17px}
.intro-aside{padding:24px;border-left:2px solid var(--terracotta);background:rgba(255,253,249,.65)}
.intro-aside b{display:block;font-size:13px;color:var(--terracotta);margin-bottom:5px}
.intro-aside span{font-size:14px;color:var(--ink)}
.compat-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.download-area{background:#e9f1ed}
.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
.download-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;min-height:322px;display:flex;flex-direction:column;transition:.22s}
.download-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b7cec6}
.system-icon{width:46px;height:46px;border:1px solid #afc7bf;background:var(--teal-soft);color:var(--teal);display:grid;place-items:center;border-radius:14px;font-size:15px;font-weight:800}
.download-card h3{font-size:22px;margin:20px 0 8px}
.download-card p{font-size:14px;color:var(--muted);margin:0 0 18px}
.download-meta{padding:12px 0;border-top:1px solid var(--line);font-size:13px;color:#52635f;margin-top:auto}
.download-card .btn{margin-top:18px;width:100%}
.download-note{font-size:12px;color:var(--muted);margin:12px 0 0}
.preview-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:68px;align-items:center}
.preview-copy p{color:var(--muted);margin:0 0 22px}
.preview-list{list-style:none;margin:0;padding:0}
.preview-list li{padding:13px 0;border-bottom:1px solid var(--line);display:flex;gap:13px;align-items:flex-start;font-size:14px}
.preview-list i{font-style:normal;color:var(--terracotta);font-weight:800}
.phone-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;align-items:end}
.device{min-height:292px;border:7px solid #17302d;border-radius:27px;background:var(--white);padding:15px 10px;position:relative;box-shadow:0 14px 22px rgba(16,63,59,.12);overflow:hidden}
.device:nth-child(2){transform:translateY(-25px);background:#f0f6f2}
.device:nth-child(3){background:#fff8f3}
.device:nth-child(4){transform:translateY(10px)}
.speaker{width:42px;height:5px;background:#17302d;border-radius:5px;margin:0 auto 15px}
.screen-title{font-size:10px;font-weight:800;color:var(--teal-dark);margin-bottom:10px}
.screen-line{height:8px;background:#dfeee9;border-radius:5px;margin:7px 0}
.screen-line.short{width:62%}
.screen-card{height:54px;border-radius:9px;background:var(--teal);margin:10px 0;padding:8px;color:#fff;font-size:9px}
.screen-card.warm{background:#e8c4b5;color:#703b2a}
.screen-nav{position:absolute;left:11px;right:11px;bottom:13px;padding-top:8px;border-top:1px solid #d8ded8;display:flex;justify-content:space-around;font-size:8px;color:var(--teal)}
.steps-wrap{display:grid;grid-template-columns:1fr 1.6fr;gap:70px;align-items:start}
.side-title{position:sticky;top:108px}
.side-title h2{font-size:36px;line-height:1.25;letter-spacing:-.05em;margin:0 0 16px}
.side-title p{color:var(--muted);margin:0}
.install-list{border-top:1px solid var(--line)}
.install-item{display:grid;grid-template-columns:70px 1fr auto;gap:22px;align-items:center;padding:23px 0;border-bottom:1px solid var(--line)}
.step-no{font-size:13px;font-weight:800;color:var(--terracotta);letter-spacing:.08em}
.install-item h3{font-size:19px;margin:0 0 4px}
.install-item p{color:var(--muted);font-size:14px;margin:0}
.text-link{font-size:13px;font-weight:800;color:var(--teal);white-space:nowrap}
.text-link:hover{color:var(--terracotta)}
.update-section{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.update-timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:6px}
.update-item{border-top:2px solid #a6c2b9;padding:23px 18px 2px;position:relative}
.update-item:before{content:"";width:11px;height:11px;background:var(--terracotta);border-radius:50%;position:absolute;left:17px;top:-7px}
.update-item time{display:block;color:var(--terracotta);font-size:12px;font-weight:800;margin-bottom:7px}
.update-item h3{font-size:17px;margin:0 0 8px}
.update-item p{font-size:13px;color:var(--muted);margin:0}
.channel-grid{display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:16px}
.channel-card{min-height:215px;border:1px solid var(--line);border-radius:var(--radius);padding:25px;background:var(--white);position:relative;transition:.2s}
.channel-card:first-child{background:var(--teal-dark);color:#fff}
.channel-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.channel-card h3{font-size:22px;margin:38px 0 7px}
.channel-card p{font-size:14px;color:var(--muted);margin:0}
.channel-card:first-child p{color:#c5dad4}
.channel-card .arrow{position:absolute;right:25px;top:22px;color:var(--terracotta);font-size:24px}
.support-section{padding-top:88px}
.support-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:65px;align-items:start}
.support-copy{background:var(--teal-dark);color:#fff;border-radius:var(--radius);padding:34px}
.support-copy h2{font-size:31px;line-height:1.3;margin:0 0 14px;letter-spacing:-.04em}
.support-copy p{color:#c6dbd5;font-size:14px;margin:0}
.support-points{margin:23px 0 0;padding:0;list-style:none}
.support-points li{border-top:1px solid rgba(255,255,255,.15);padding:13px 0;font-size:14px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-question{width:100%;border:0;background:transparent;padding:19px 42px 19px 0;color:var(--ink);font-weight:800;font-size:16px;text-align:left;position:relative}
.faq-question:after{content:"+";position:absolute;right:6px;top:15px;font-size:24px;font-weight:400;color:var(--teal);transition:.2s}
.faq-item.open .faq-question:after{content:"−";color:var(--terracotta)}
.faq-answer{display:none;color:var(--muted);font-size:14px;padding:0 30px 20px 0}
.faq-item.open .faq-answer{display:block}
.support-action{margin-top:28px}
.site-footer{background:var(--teal-dark);color:#edf5f1;padding:58px 0 23px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:60px;padding-bottom:42px}
.footer-grid h3{font-size:16px;margin:0 0 13px;color:#fff}
.footer-grid p{color:#bad0c9;font-size:14px;max-width:310px;margin:0}
.footer-grid ul{margin:0;padding:0;list-style:none;color:#bdd1cb;font-size:14px;line-height:2.1}
.copyright{border-top:1px solid rgba(255,255,255,.15);padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#a8c1b9;font-size:13px}
@media(max-width:1024px){
 .nav{gap:18px}.intro-grid,.preview-layout,.steps-wrap,.support-grid{gap:38px}.page-intro h1{font-size:43px}.phone-gallery{gap:10px}.device{min-height:255px}.download-grid{gap:13px}.update-item{padding-left:12px}.update-item:before{left:11px}
}
@media(max-width:768px){
 .container{width:min(var(--max),calc(100% - 34px))}.site-header{height:70px}.header-inner{gap:12px}.brand{font-size:16px}.brand-mark{width:31px;height:31px}.menu-toggle{display:block;margin-left:auto}.header-cta{display:none}
 .nav{display:none;position:absolute;top:70px;left:0;right:0;background:var(--white);border-bottom:1px solid var(--line);padding:8px 17px 16px;box-shadow:0 14px 25px rgba(16,63,59,.08);flex-direction:column;align-items:stretch;gap:0}
 .nav.open{display:flex}.nav a{padding:12px 6px}.nav a.active:after{bottom:6px}
 .section{padding:58px 0}.section-head{display:block;margin-bottom:26px}.section-head h2{font-size:29px;margin-bottom:11px}
 .page-intro{padding:44px 0}.page-intro:after{width:270px;height:270px;right:-150px;top:-120px}.intro-grid,.preview-layout,.steps-wrap,.support-grid{grid-template-columns:1fr;gap:27px}.page-intro h1{font-size:35px}.page-intro p{font-size:16px}.intro-aside{max-width:460px}.download-grid{grid-template-columns:1fr}.download-card{min-height:auto}.phone-gallery{grid-template-columns:repeat(2,1fr);max-width:380px;margin:auto}.device{min-height:280px}.device:nth-child(2),.device:nth-child(4){transform:translateY(0)}
 .side-title{position:static}.side-title h2{font-size:30px}.install-item{grid-template-columns:54px 1fr;gap:12px}.install-item .text-link{grid-column:2}.update-timeline{grid-template-columns:repeat(2,1fr);gap:24px}.channel-grid{grid-template-columns:1fr}.channel-card{min-height:180px}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-grid>div:first-child{grid-column:span 2}.copyright{display:block}.copyright span{display:block;margin-bottom:4px}
}
@media(max-width:480px){
 body{font-size:15px}.container{width:calc(100% - 28px)}.notice-bar .container{font-size:12px}.page-intro h1{font-size:31px}.section-head h2{font-size:27px}.compat-tags{margin-top:18px}.download-card{padding:22px}.preview-copy h2,.side-title h2,.support-copy h2{font-size:27px}.install-item{grid-template-columns:1fr;gap:6px;padding:19px 0}.install-item .text-link{grid-column:auto;margin-top:5px}.update-timeline{grid-template-columns:1fr;gap:18px}.update-item{padding-left:14px}.support-copy{padding:27px 23px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.btn{width:100%}
}

/* roulang page: category3 */
:root{--teal:#17645d;--teal-dark:#103f3b;--teal-soft:#dfeee9;--terracotta:#bd694e;--paper:#f5f3ee;--white:#fffdf9;--ink:#17302d;--muted:#6a7772;--line:#d8ded8;--radius:18px;--shadow:0 12px 30px rgba(21,54,49,.08);--max:1200px}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}
    a{color:inherit;text-decoration:none}
    a:focus-visible,button:focus-visible{outline:3px solid rgba(189,105,78,.45);outline-offset:4px}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 48px));margin:auto}
    .site-header{height:78px;display:flex;align-items:center;background:rgba(245,243,238,.96);border-bottom:1px solid transparent;position:sticky;top:0;z-index:20;transition:.25s}
    .site-header.scrolled{border-color:var(--line);box-shadow:0 4px 18px rgba(16,63,59,.05)}
    .header-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.04em;font-size:19px;white-space:nowrap}
    .brand-mark{width:34px;height:34px;background:var(--teal);color:#fff;border-radius:9px;display:grid;place-items:center;font-size:14px}
    .nav{display:flex;align-items:center;gap:27px;margin-left:auto}
    .nav a{font-size:14px;color:#52635f;padding:26px 0;position:relative}
    .nav a:hover,.nav a.active{color:var(--teal-dark)}
    .nav a.active:after{content:"";height:3px;width:22px;background:var(--terracotta);position:absolute;bottom:16px;left:0;border-radius:4px}
    .menu-toggle{display:none;background:none;border:0;color:var(--teal);font-size:25px}
    .header-action{margin-left:4px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border-radius:11px;border:1px solid transparent;font-weight:700;font-size:14px;transition:.2s}
    .btn-primary{background:var(--teal);color:#fff}
    .btn-primary:hover{background:var(--teal-dark);transform:translateY(-2px)}
    .btn-outline{border-color:#9db6ae;color:var(--teal);background:transparent}
    .btn-outline:hover{background:var(--teal-soft);transform:translateY(-2px)}
    .eyebrow{color:var(--terracotta);font-size:13px;font-weight:800;letter-spacing:.08em;margin-bottom:12px}
    .section{padding:78px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:34px}
    .section-head h2{font-size:34px;line-height:1.25;margin:0;letter-spacing:-.04em}
    .section-head p{color:var(--muted);margin:0;max-width:510px}
    .page-intro{padding:76px 0 58px;border-bottom:1px solid var(--line);background:var(--paper)}
    .crumbs{font-size:13px;color:var(--muted);margin-bottom:25px}
    .crumbs a{color:var(--teal);font-weight:700}
    .intro-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:50px;align-items:end}
    .page-intro h1{font-size:50px;line-height:1.2;letter-spacing:-.06em;margin:0 0 18px}
    .page-intro p{color:var(--muted);max-width:670px;margin:0}
    .update-box{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:23px}
    .update-box small{display:block;color:var(--terracotta);font-weight:800;font-size:12px;margin-bottom:5px}
    .update-box strong{font-size:17px;display:block}
    .guide-path{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .path-node{padding:27px 24px;position:relative;border-right:1px solid var(--line)}
    .path-node:last-child{border:0}
    .path-node b{color:var(--terracotta);font-size:13px;letter-spacing:.08em}
    .path-node h3{font-size:19px;margin:9px 0 4px}
    .path-node p{font-size:14px;color:var(--muted);margin:0}
    .guide-list{display:grid;grid-template-columns:repeat(2,1fr);gap:17px}
    .guide-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;min-height:205px;transition:.2s;display:flex;flex-direction:column}
    .guide-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .card-top{display:flex;justify-content:space-between;align-items:center;gap:12px}
    .tag{display:inline-flex;padding:4px 10px;border-radius:30px;background:#e9eee9;color:var(--teal-dark);font-size:12px;font-weight:700}
    .difficulty{color:var(--terracotta);font-size:12px;font-weight:800}
    .guide-card h3{font-size:21px;line-height:1.4;margin:18px 0 8px}
    .guide-card p{font-size:14px;color:var(--muted);margin:0 0 17px}
    .card-meta{margin-top:auto;display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px}
    .card-meta a{color:var(--teal);font-weight:800}
    .quick-topics{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .topic{background:var(--teal-soft);border:1px solid #c8ddd6;border-radius:14px;padding:21px 17px;transition:.2s}
    .topic:hover{background:#cfe5df;transform:translateY(-3px)}
    .topic strong{display:block;font-size:16px;margin-bottom:5px}
    .topic span{font-size:13px;color:#55716a}
    .example{background:#ebe9e1;padding:44px;border-radius:var(--radius)}
    .example-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:46px;align-items:center}
    .example h2{font-size:31px;line-height:1.3;margin:0 0 12px}
    .example p{color:var(--muted);margin:0}
    .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
    .step-card{background:var(--white);border:1px solid var(--line);border-radius:15px;padding:22px}
    .step-number{width:34px;height:34px;background:var(--teal);color:#fff;border-radius:9px;display:grid;place-items:center;font-weight:800;margin-bottom:22px}
    .step-card h3{font-size:18px;margin:0 0 7px}
    .step-card p{font-size:14px;color:var(--muted);margin:0}
    .mini-screen{height:108px;background:var(--white);border:1px solid var(--line);border-radius:14px;padding:14px;margin-top:18px}
    .mini-line{height:8px;background:var(--teal-soft);border-radius:5px;margin-bottom:9px}
    .mini-line.short{width:62%;background:#f1e4dc}
    .entry-panel{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .entry-link{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;justify-content:space-between;gap:15px;align-items:start;transition:.2s}
    .entry-link:hover{border-color:#9db6ae;box-shadow:var(--shadow);transform:translateY(-3px)}
    .entry-link h3{font-size:19px;margin:0 0 6px}
    .entry-link p{font-size:13px;color:var(--muted);margin:0}
    .entry-arrow{color:var(--terracotta);font-size:23px}
    .support{background:var(--teal-dark);color:#fff}
    .support-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
    .support h2{font-size:34px;line-height:1.3;margin:0 0 15px}
    .support p{color:#c8ddd7;margin:0 0 24px}
    .support-list{display:grid;grid-template-columns:repeat(2,1fr);gap:13px}
    .support-item{border-left:2px solid var(--terracotta);padding-left:14px;color:#d8e6e1;font-size:14px}
    .faq-list{display:grid;gap:11px}
    .faq-item{background:var(--white);border:1px solid var(--line);border-radius:13px;overflow:hidden}
    .faq-question{width:100%;border:0;background:none;color:var(--ink);padding:18px 21px;text-align:left;font-weight:700;display:flex;justify-content:space-between;align-items:center}
    .faq-question span{color:var(--terracotta);font-size:22px;transition:.2s}
    .faq-answer{display:none;padding:0 21px 19px;color:var(--muted);font-size:14px}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-question span{transform:rotate(45deg)}
    .site-footer{background:#102f2c;color:#d6e4df;padding:52px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:55px}
    .site-footer h3{color:#fff;margin:0 0 13px;font-size:17px}
    .site-footer p{color:#aec4bd;font-size:14px;margin:0;max-width:280px}
    .site-footer ul{list-style:none;margin:0;padding:0;color:#aec4bd;font-size:14px;line-height:2.1}
    .copyright{border-top:1px solid rgba(214,228,223,.16);margin-top:38px;padding-top:17px;display:flex;justify-content:space-between;gap:20px;color:#91aaa2;font-size:12px}
    @media(max-width:960px){
      .nav{gap:17px}.hero-grid,.intro-grid,.example-grid,.support-grid{grid-template-columns:1fr}
      .page-intro h1{font-size:42px}.guide-path{grid-template-columns:repeat(2,1fr)}
      .path-node:nth-child(2){border-right:0}.path-node:nth-child(-n+2){border-bottom:1px solid var(--line)}
      .quick-topics{grid-template-columns:repeat(3,1fr)}.entry-panel{grid-template-columns:1fr}
    }
    @media(max-width:768px){
      .container{width:min(var(--max),calc(100% - 32px))}
      .site-header{height:70px}.menu-toggle{display:block}.header-action{display:none}
      .nav{display:none;position:absolute;left:0;right:0;top:70px;background:var(--paper);padding:10px 24px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:flex-start;gap:0}
      .nav.open{display:flex}.nav a{padding:10px 0;width:100%}.nav a.active:after{bottom:4px}
      .section{padding:57px 0}.section-head{display:block}.section-head h2{font-size:29px;margin-bottom:11px}
      .page-intro{padding:52px 0 42px}.page-intro h1{font-size:35px}.guide-list{grid-template-columns:1fr}
      .quick-topics{grid-template-columns:repeat(2,1fr)}.example{padding:28px 22px}.steps{grid-template-columns:1fr}
      .support-list{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}
      .footer-grid>div:first-child{grid-column:1/-1}.copyright{display:block}.copyright span{display:block;margin-top:4px}
    }
    @media(max-width:480px){
      .brand{font-size:16px}.brand-mark{width:30px;height:30px}
      .guide-path{grid-template-columns:1fr}.path-node{border-right:0;border-bottom:1px solid var(--line)!important}
      .path-node:last-child{border-bottom:0!important}.quick-topics{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}
    }