/* roulang page: index */
:root{
  --pine:#174b43;
  --pine-deep:#103a34;
  --pine-soft:#dceae4;
  --lime:#c8e94b;
  --lime-light:#e8f6a7;
  --clay:#e87b4c;
  --cream:#f6f5ef;
  --white:#fff;
  --ink:#1c2623;
  --muted:#65716d;
  --line:#dce4df;
  --radius:14px;
  --radius-lg:20px;
  --shadow:0 8px 24px rgba(23,75,67,.08);
  --shadow-hover:0 13px 30px rgba(23,75,67,.14);
  --max:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC","Hiragino Sans GB",Arial,sans-serif;background:var(--cream);color:var(--ink);line-height:1.7;font-size:15px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input{font:inherit}
button{cursor:pointer}
.container{width:min(var(--max),calc(100% - 64px));margin:auto}
.site-header{height:78px;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30;transition:.25s;backdrop-filter:blur(12px)}
.navbar{height:78px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--pine);font-size:17px;letter-spacing:-.4px;white-space:nowrap}
.logo-mark{width:34px;height:34px;border-radius:10px;background:var(--pine);position:relative;overflow:hidden}
.logo-mark:before,.logo-mark:after{content:"";position:absolute;border:2px solid var(--lime);border-radius:50%}
.logo-mark:before{width:24px;height:14px;left:5px;top:10px}
.logo-mark:after{width:2px;height:24px;left:15px;top:5px;border-width:0 2px 0 0;border-radius:0}
.nav-links{display:flex;align-items:center;gap:24px;margin-left:auto}
.nav-links a{min-height:44px;display:flex;align-items:center;color:var(--muted);font-weight:600;position:relative}
.nav-links a:hover,.nav-links a.active{color:var(--pine)}
.nav-links a.active:after{content:"";position:absolute;height:3px;background:var(--lime);bottom:7px;left:0;right:0;border-radius:3px}
.header-action{padding:10px 16px;border-radius:9px;background:var(--pine);color:#fff;font-weight:700;min-height:44px}
.header-action:hover{background:var(--pine-deep);box-shadow:var(--shadow)}
.menu-toggle{display:none;border:0;background:transparent;color:var(--pine);font-size:25px;width:44px;height:44px}
.hero{padding:78px 0 58px;background:var(--cream);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:70px;align-items:center}
.eyebrow,.section-kicker{color:var(--pine);font-size:12px;font-weight:800;letter-spacing:1.5px;text-transform:uppercase}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:18px}
.eyebrow:before{content:"";width:27px;height:3px;background:var(--lime);border-radius:2px}
.hero h1{font-size:clamp(38px,5vw,58px);line-height:1.16;letter-spacing:-2px;margin-bottom:22px;color:var(--pine-deep);max-width:680px}
.hero h1 span{color:var(--clay)}
.hero-copy{font-size:17px;color:var(--muted);max-width:620px;line-height:1.9}
.actions{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:9px;border:1px solid transparent;font-weight:800;transition:.2s}
.btn-primary{background:var(--pine);color:#fff}
.btn-primary:hover{background:var(--pine-deep);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-lime{background:var(--lime);color:var(--pine-deep)}
.btn-lime:hover{background:#d9f36c;transform:translateY(-2px)}
.btn-outline{border-color:var(--pine);color:var(--pine);background:#fff}
.btn-outline:hover{background:var(--pine-soft)}
.btn:focus,a:focus,button:focus{outline:3px solid rgba(200,233,75,.7);outline-offset:3px}
.hero-note{display:flex;gap:20px;margin-top:27px;flex-wrap:wrap}
.hero-note span{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:7px}
.hero-note i{width:7px;height:7px;background:var(--lime);border-radius:50%;display:inline-block}
.device-scene{min-height:430px;position:relative;display:flex;justify-content:center;align-items:center}
.device-scene:before{content:"";position:absolute;width:390px;height:290px;border-radius:50%;background:var(--pine-soft);transform:rotate(-12deg)}
.phone{width:230px;height:430px;background:var(--pine-deep);border:8px solid #0b2d29;border-radius:32px;padding:13px;position:relative;z-index:1;box-shadow:0 22px 45px rgba(16,58,52,.25)}
.phone-top{height:22px;display:flex;justify-content:space-between;color:#e8f6e4;font-size:10px}
.phone-title{font-size:18px;color:#fff;font-weight:800;margin:10px 0 16px}
.score-item{background:#fff;border-radius:10px;padding:10px;margin-bottom:9px;color:var(--ink)}
.score-item small{font-size:10px;color:var(--muted)}
.score-line{display:flex;justify-content:space-between;align-items:center;font-size:12px;font-weight:700;margin-top:4px}
.live{color:var(--clay);font-size:10px}
.phone-progress{background:#2f6860;border-radius:8px;padding:11px;margin-top:13px;color:#fff;font-size:11px}
.progress-line{height:5px;background:var(--lime);border-radius:8px;margin-top:8px;width:72%}
.phone-nav{position:absolute;bottom:11px;left:13px;right:13px;display:flex;justify-content:space-around;color:#b8d0c7;font-size:10px;border-top:1px solid #38635d;padding-top:10px}
.phone-nav b{color:var(--lime)}
.info-strip{background:var(--pine);color:#fff;padding:20px 0}
.strip-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.strip-item{padding:8px 24px;border-right:1px solid rgba(255,255,255,.2);display:flex;gap:13px;align-items:center}
.strip-item:first-child{padding-left:0}
.strip-item:last-child{border:0}
.strip-icon{font-size:23px;color:var(--lime)}
.strip-item strong{display:block;font-size:14px}
.strip-item small{color:#b8d0c7;font-size:12px}
.section{padding:82px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:28px;gap:20px}
.section-head h2{font-size:32px;line-height:1.25;color:var(--pine-deep);margin-top:7px;letter-spacing:-1px}
.section-head p{max-width:500px;color:var(--muted)}
.topic-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:14px}
.topic-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 17px;min-height:148px;transition:.2s;position:relative;overflow:hidden}
.topic-card:nth-child(1),.topic-card:nth-child(4){grid-column:span 2}
.topic-card:before{content:"";height:5px;background:var(--lime);position:absolute;left:0;right:0;top:0}
.topic-card:nth-child(2):before,.topic-card:nth-child(5):before{background:var(--clay)}
.topic-card:hover,.article-card:hover,.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#a9c8bd}
.topic-num{font-size:12px;color:var(--muted);font-weight:800}
.topic-card h3{font-size:16px;color:var(--pine);margin:11px 0 5px;line-height:1.35}
.topic-card p{font-size:12px;color:var(--muted)}
.focus-section{background:#fff}
.focus-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}
.feature-card,.article-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.2s}
.feature-card{min-height:320px;padding:31px;position:relative;overflow:hidden;background:linear-gradient(135deg,#fff 0%,#eef5ef 100%)}
.feature-card:after{content:"";position:absolute;width:210px;height:210px;border:1px solid #b9d3c7;border-radius:50%;right:-65px;bottom:-75px}
.feature-card h3{font-size:27px;max-width:540px;line-height:1.35;color:var(--pine-deep);margin:15px 0 12px}
.feature-card p{max-width:560px;color:var(--muted)}
.mini-stack{display:grid;gap:18px}
.mini-card{padding:23px;min-height:151px;background:var(--cream);border:1px solid var(--line);border-radius:var(--radius);transition:.2s}
.mini-card:hover{border-color:var(--pine);transform:translateX(3px)}
.meta{display:flex;gap:12px;align-items:center;color:var(--muted);font-size:12px;margin-top:16px}
.tag{display:inline-flex;padding:3px 9px;background:var(--pine-soft);color:var(--pine);border-radius:5px;font-size:11px;font-weight:800}
.tag.hot{background:#fce2d6;color:#a64d2e}
.steps{display:grid;grid-template-columns:repeat(4,1fr);border-top:2px solid var(--pine-soft)}
.step{padding:25px 20px 10px;border-right:1px solid var(--line);position:relative}
.step:last-child{border:0}
.step-no{font-size:37px;line-height:1;color:var(--lime);font-weight:900;text-shadow:1px 1px 0 var(--pine)}
.step h3{font-size:17px;margin:14px 0 6px;color:var(--pine)}
.step p{color:var(--muted);font-size:13px}
.download-panel{background:var(--pine);color:#fff;border-radius:var(--radius-lg);padding:42px;display:grid;grid-template-columns:1fr .8fr;gap:40px;overflow:hidden;position:relative}
.download-panel:after{content:"";position:absolute;right:-120px;top:-150px;width:370px;height:370px;border:1px solid rgba(200,233,75,.28);border-radius:50%}
.download-panel h2{font-size:31px;line-height:1.3;margin:8px 0 14px}
.download-panel p{color:#c4d8d0;max-width:530px}
.system-tags{display:flex;gap:9px;flex-wrap:wrap;margin:20px 0}
.system-tags span{border:1px solid #527a71;padding:5px 10px;border-radius:6px;font-size:12px}
.qr-area{display:flex;gap:22px;align-items:center;position:relative;z-index:1}
.qr{width:105px;height:105px;background:repeating-linear-gradient(45deg,#fff 0 5px,#d5e5da 5px 9px);border:8px solid #fff;border-radius:8px}
.mock-row{display:flex;gap:24px;justify-content:center;align-items:center}
.small-phone{width:155px;height:265px;border:6px solid #0b2d29;border-radius:22px;background:#fff;padding:10px;color:var(--ink);box-shadow:var(--shadow)}
.small-phone:nth-child(2){transform:translateY(24px)}
.small-phone h4{font-size:13px;color:var(--pine);margin:10px 0}
.mock-bar{height:10px;background:var(--pine-soft);border-radius:4px;margin:9px 0}
.mock-bar.accent{background:var(--lime);width:65%}
.compat{font-size:12px;color:#b8d0c7;margin-top:17px}
.showcase{background:var(--pine-soft)}
.showcase-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.showcase-card{background:#fff;border-radius:var(--radius);padding:19px;display:grid;grid-template-columns:110px 1fr;gap:18px;align-items:center}
.showcase-screen{height:170px;background:var(--pine-deep);border-radius:17px;padding:14px;color:#fff}
.showcase-screen b{font-size:12px;color:var(--lime)}
.showcase-card h3{font-size:17px;color:var(--pine);margin-bottom:7px}
.showcase-card p{font-size:13px;color:var(--muted)}
.news-layout{display:grid;grid-template-columns:250px 1fr;gap:50px}
.news-side h2{font-size:31px;color:var(--pine-deep);line-height:1.3;margin:8px 0 13px}
.news-side p{color:var(--muted)}
.filter{display:flex;gap:7px;flex-wrap:wrap;margin-top:22px}
.news-list{display:grid;gap:12px}
.news-item{display:grid;grid-template-columns:1fr auto;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}
.news-item h3{font-size:17px;color:var(--pine);line-height:1.4}
.news-item p{font-size:13px;color:var(--muted);margin-top:4px}
.news-item .meta{margin-top:8px}
.news-arrow{color:var(--pine);font-size:22px;align-self:center}
.empty-state{padding:38px;text-align:center;background:#fff;border:1px dashed #b6c9c0;border-radius:var(--radius);color:var(--muted)}
.timeline-section{background:#e9f2ed}
.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:0;position:relative}
.timeline:before{content:"";position:absolute;top:20px;left:12%;right:12%;border-top:2px dashed #9fbbb0}
.timeline-node{position:relative;padding:0 24px;text-align:center}
.timeline-dot{width:40px;height:40px;margin:0 auto 20px;background:var(--lime);border:8px solid #e9f2ed;border-radius:50%;position:relative;z-index:1}
.timeline-node h3{color:var(--pine);margin-bottom:7px}
.timeline-node p{font-size:13px;color:var(--muted)}
.timeline-node a{display:block;color:var(--pine);font-weight:700;font-size:13px;margin-top:10px}
.tutorial-layout{display:grid;grid-template-columns:220px 1fr;gap:38px}
.chapter{border-left:3px solid var(--pine);padding-left:18px}
.chapter li{list-style:none;padding:9px 0;color:var(--muted);font-size:13px}
.chapter li:first-child{color:var(--pine);font-weight:800}
.tutorial-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
.tutorial-card{padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);min-height:190px}
.tutorial-card h3{font-size:17px;color:var(--pine);margin:14px 0 7px}
.tutorial-card p{font-size:13px;color:var(--muted)}
.terms{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.term{background:#fff;border:1px solid var(--line);border-radius:10px;padding:17px}
.term summary{font-weight:800;color:var(--pine);cursor:pointer}
.term p{font-size:13px;color:var(--muted);padding-top:9px}
.security{background:#fbe9df;border-left:5px solid var(--clay);padding:27px 30px;border-radius:var(--radius);display:flex;gap:25px;align-items:flex-start}
.security-icon{font-size:35px;color:var(--clay)}
.security h2{font-size:23px;color:#75412f;margin-bottom:8px}
.checks{display:flex;gap:24px;flex-wrap:wrap;color:#75412f;font-size:14px}
.checks span:before{content:"✓";font-weight:900;margin-right:7px}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px}
.faq-item summary{font-weight:800;color:var(--pine);cursor:pointer}
.faq-item p{color:var(--muted);font-size:13px;padding:10px 22px 0 0}
.final-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:35px;display:flex;align-items:center;justify-content:space-between;gap:25px}
.final-box h2{color:var(--pine-deep);font-size:27px}
.final-box p{color:var(--muted);margin-top:6px}
.responsibility{margin-top:22px;padding:18px;background:#eef1e8;border-radius:10px;color:var(--muted);font-size:12px}
.site-footer{background:var(--pine-deep);color:#d5e2dc;padding:55px 0 20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:35px;padding-bottom:38px;border-bottom:1px solid rgba(255,255,255,.15)}
.site-footer .logo{color:#fff;margin-bottom:15px}
.site-footer .logo-mark{background:var(--lime)}
.footer-title{color:var(--lime);font-size:14px;font-weight:800;margin-bottom:14px}
.site-footer p,.site-footer li,.site-footer a{color:#b8cdc4;font-size:13px}
.site-footer ul{list-style:none;display:grid;gap:7px}
.site-footer a:hover{color:var(--lime)}
.footer-note{line-height:1.8}
.copyright{display:flex;justify-content:space-between;gap:20px;padding-top:18px;color:#91aba1;font-size:12px;flex-wrap:wrap}
@media(max-width:960px){
 .container{width:min(var(--max),calc(100% - 48px))}
 .nav-links{gap:12px}.header-action{display:none}
 .hero-grid{gap:35px}.topic-grid{grid-template-columns:repeat(4,1fr)}
 .topic-card:nth-child(1),.topic-card:nth-child(4){grid-column:span 2}
 .download-panel{grid-template-columns:1fr}.showcase-grid{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
 .container{width:calc(100% - 32px)}
 .site-header,.navbar{height:68px}.navbar{position:relative}
 .nav-links{display:none;position:fixed;inset:68px 0 0;background:var(--cream);padding:30px 24px;flex-direction:column;align-items:stretch;gap:5px}
 .nav-links.open{display:flex}.nav-links a{font-size:20px;border-bottom:1px solid var(--line)}
 .menu-toggle{display:block}.hero{padding:53px 0 40px}.hero-grid{grid-template-columns:1fr}
 .hero h1{font-size:40px}.device-scene{min-height:390px}
 .strip-grid{grid-template-columns:repeat(2,1fr)}.strip-item{border-bottom:1px solid rgba(255,255,255,.2);padding:10px 12px}
 .strip-item:first-child{padding-left:12px}
 .section{padding:60px 0}.section-head{display:block}.section-head h2{font-size:27px;margin-bottom:10px}
 .topic-grid{grid-template-columns:repeat(2,1fr)}.topic-card:nth-child(1),.topic-card:nth-child(4){grid-column:span 1}
 .focus-grid,.news-layout,.tutorial-layout{grid-template-columns:1fr}.news-layout,.tutorial-layout{gap:25px}
 .steps,.timeline{grid-template-columns:1fr}.step{border-right:0;border-bottom:1px solid var(--line);padding-left:0}
 .timeline:before{left:20px;top:20px;bottom:20px;right:auto;border-top:0;border-left:2px dashed #9fbbb0}
 .timeline-node{text-align:left;padding:0 0 25px 62px}.timeline-dot{position:absolute;left:0;top:0;margin:0}
 .tutorial-cards,.terms,.faq-grid{grid-template-columns:1fr}
 .download-panel{padding:28px 22px}.final-box{display:block}.final-box .actions{margin-top:20px}
}
@media(max-width:480px){
 body{font-size:14px}.hero h1{font-size:34px;letter-spacing:-1px}.hero-copy{font-size:15px}
 .actions,.actions .btn{width:100%}.actions .btn{min-height:48px}
 .strip-grid{grid-template-columns:1fr}.strip-item{border-right:0}.topic-grid{grid-template-columns:1fr}
 .feature-card{padding:23px}.feature-card h3{font-size:22px}.news-item{grid-template-columns:1fr;gap:4px}
 .news-arrow{display:none}.mock-row{gap:10px}.small-phone{width:130px}.qr-area{align-items:flex-start;flex-direction:column}
 .footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin-top:5px}
}

/* roulang page: article */
:root{
      --pine:#174b43;
      --pine-deep:#103a34;
      --pine-soft:#dceae4;
      --lime:#c8e94b;
      --lime-light:#e8f6a7;
      --clay:#e87b4c;
      --cream:#f6f5ef;
      --white:#fff;
      --ink:#1c2623;
      --muted:#65716d;
      --line:#dce4df;
      --radius:14px;
      --radius-lg:20px;
      --shadow:0 8px 24px rgba(23,75,67,.08);
      --shadow-hover:0 13px 30px rgba(23,75,67,.14);
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC","Hiragino Sans GB",Arial,sans-serif;font-size:15px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button{font:inherit;cursor:pointer}
    .container{width:min(var(--max),calc(100% - 64px));margin:0 auto}
    .site-header{height:78px;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30;backdrop-filter:blur(12px);transition:.25s}
    .navbar{height:78px;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--pine);font-size:17px;letter-spacing:-.4px;white-space:nowrap}
    .logo-mark{width:34px;height:34px;border-radius:10px;background:var(--pine);position:relative;overflow:hidden;display:inline-block}
    .logo-mark:before,.logo-mark:after{content:"";position:absolute;border:2px solid var(--lime);border-radius:50%}
    .logo-mark:before{width:24px;height:14px;left:5px;top:10px}
    .logo-mark:after{width:2px;height:24px;left:15px;top:5px;border-width:0 2px 0 0;border-radius:0}
    .nav-links{display:flex;align-items:center;gap:24px;margin-left:auto}
    .nav-links a{min-height:44px;display:flex;align-items:center;color:var(--muted);font-weight:600;position:relative}
    .nav-links a:hover,.nav-links a.active{color:var(--pine)}
    .nav-links a.active:after{content:"";position:absolute;height:3px;background:var(--lime);bottom:7px;left:0;right:0;border-radius:3px}
    .header-action{padding:10px 16px;border-radius:9px;background:var(--pine);color:#fff;font-weight:700;min-height:44px;display:inline-flex;align-items:center}
    .header-action:hover{background:var(--pine-deep);box-shadow:var(--shadow)}
    .menu-toggle{display:none;border:0;background:transparent;color:var(--pine);font-size:25px;width:44px;height:44px}
    .article-top{padding:48px 0 36px;background:#fff;border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:25px}
    .breadcrumb a:hover{color:var(--pine)}
    .breadcrumb .current{color:var(--ink);max-width:480px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .article-heading{max-width:900px}
    .tag{display:inline-flex;align-items:center;min-height:27px;padding:3px 10px;border-radius:7px;background:var(--pine-soft);color:var(--pine);font-size:12px;font-weight:800}
    .article-heading h1{font-size:clamp(34px,4.3vw,50px);line-height:1.25;letter-spacing:-1.5px;color:var(--pine-deep);margin:15px 0 17px}
    .article-meta{display:flex;flex-wrap:wrap;gap:17px;color:var(--muted);font-size:13px}
    .article-meta span{display:inline-flex;align-items:center;gap:6px}
    .meta-dot{width:6px;height:6px;border-radius:50%;background:var(--lime);display:inline-block}
    .article-layout{display:grid;grid-template-columns:minmax(0,820px) 250px;gap:48px;align-items:start;padding:54px 0 78px}
    .article-main{min-width:0}
    .summary-box{background:var(--pine-soft);border-left:4px solid var(--pine);border-radius:0 var(--radius) var(--radius) 0;padding:22px 25px;margin-bottom:35px;color:var(--pine-deep)}
    .summary-box strong{display:block;margin-bottom:5px;font-size:14px}
    .summary-box p{margin:0;color:#355b53;line-height:1.85}
    .article-content{font-size:17px;line-height:2;color:#293632}
    .article-content h2{font-size:28px;line-height:1.4;color:var(--pine-deep);margin:42px 0 16px;padding-left:15px;border-left:5px solid var(--lime)}
    .article-content h3{font-size:21px;color:var(--pine);margin:30px 0 10px}
    .article-content p{margin:0 0 20px}
    .article-content ul,.article-content ol{padding-left:27px;margin:10px 0 24px}
    .article-content li{margin:7px 0}
    .article-content blockquote{margin:28px 0;padding:18px 22px;background:#fff;border-radius:var(--radius);border:1px solid var(--line);color:var(--muted)}
    .article-content img{border-radius:12px;margin:25px auto}
    .article-content table{width:100%;border-collapse:collapse;margin:25px 0;background:#fff;font-size:14px;display:block;overflow-x:auto}
    .article-content th{background:var(--pine-soft);color:var(--pine-deep);text-align:left}
    .article-content th,.article-content td{border:1px solid var(--line);padding:11px 14px;min-width:130px}
    .article-content a{color:var(--pine);text-decoration:underline;text-decoration-color:var(--lime)}
    .article-tools{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:0 0 30px;padding:13px 16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
    .tool-label{font-size:13px;color:var(--muted)}
    .share-actions{display:flex;gap:8px;flex-wrap:wrap}
    .share-btn{border:1px solid var(--line);background:var(--white);border-radius:8px;min-height:38px;padding:5px 12px;color:var(--pine);font-size:13px}
    .share-btn:hover{background:var(--pine-soft);border-color:var(--pine)}
    .app-tip{display:flex;justify-content:space-between;align-items:center;gap:22px;background:var(--pine);color:#fff;border-radius:var(--radius-lg);padding:23px 26px;margin:38px 0}
    .app-tip h3{font-size:19px;margin:0 0 4px;color:var(--lime)}
    .app-tip p{margin:0;color:#d6e4de;font-size:13px}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:9px;border:1px solid transparent;font-weight:800;transition:.2s}
    .btn-primary{background:var(--pine);color:#fff}
    .btn-primary:hover{background:var(--pine-deep);transform:translateY(-2px);box-shadow:var(--shadow)}
    .btn-lime{background:var(--lime);color:var(--pine-deep)}
    .btn-lime:hover{background:#d9f36c;transform:translateY(-2px)}
    .btn-outline{border-color:var(--pine);color:var(--pine);background:#fff}
    .btn-outline:hover{background:var(--pine-soft)}
    .btn:focus,a:focus,button:focus{outline:3px solid rgba(200,233,75,.7);outline-offset:3px}
    .toc{position:sticky;top:106px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
    .toc-title{font-weight:800;color:var(--pine-deep);font-size:16px;margin-bottom:12px}
    .toc p{font-size:13px;color:var(--muted);margin:0;line-height:1.8}
    .side-note{margin-top:16px;padding:16px;background:#fff1e9;border-radius:var(--radius);color:#76452f;font-size:12px;line-height:1.7}
    .related-section{padding:70px 0;background:#fff;border-top:1px solid var(--line)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:25px}
    .section-kicker{color:var(--pine);font-size:12px;font-weight:800;letter-spacing:1.5px}
    .section-head h2{font-size:30px;line-height:1.3;color:var(--pine-deep);margin:7px 0 0}
    .section-head p{max-width:480px;color:var(--muted);margin:0}
    .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .related-card{padding:23px;background:var(--cream);border:1px solid var(--line);border-radius:var(--radius);transition:.2s}
    .related-card:hover{transform:translateY(-3px);border-color:#a9c8bd;box-shadow:var(--shadow-hover)}
    .related-card h3{font-size:18px;line-height:1.5;color:var(--pine);margin:14px 0 9px}
    .related-card p{font-size:13px;color:var(--muted);margin:0 0 12px}
    .read-link{font-size:13px;font-weight:800;color:var(--pine);display:inline-flex;gap:8px;align-items:center}
    .read-link:hover{color:var(--clay)}
    .responsibility{padding:28px 0 70px;background:#fff}
    .responsibility-box{display:flex;gap:20px;align-items:flex-start;padding:23px 26px;background:#fff1e9;border:1px solid #f1c5b2;border-radius:var(--radius)}
    .responsibility-box strong{color:#87462d;display:block;margin-bottom:4px}
    .responsibility-box p{margin:0;color:#765246;font-size:13px}
    .return-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
    .site-footer{background:var(--pine);color:#d9e6e0;padding:56px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.4fr .8fr .9fr 1fr;gap:38px}
    .site-footer .logo{color:#fff}
    .site-footer .logo-mark{background:#fff}
    .footer-note{font-size:13px;line-height:1.8;color:#b8d0c7;margin:17px 0 0}
    .footer-title{font-weight:800;color:var(--lime);margin-bottom:13px}
    .site-footer ul{list-style:none;padding:0;margin:0}
    .site-footer li{margin:7px 0}
    .site-footer li a{font-size:13px;color:#d9e6e0}
    .site-footer li a:hover{color:var(--lime)}
    .copyright{display:flex;justify-content:space-between;gap:15px;border-top:1px solid rgba(255,255,255,.16);margin-top:38px;padding-top:18px;color:#a9c1b8;font-size:12px}
    @media(max-width:960px){
      .container{width:min(var(--max),calc(100% - 48px))}
      .header-action{display:none}
      .article-layout{grid-template-columns:minmax(0,1fr);gap:28px}
      .toc{position:static}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .site-header,.navbar{height:70px}
      .nav-links{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;padding:18px 24px 28px;flex-direction:column;align-items:stretch;gap:5px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
      .nav-links.open{display:flex}
      .nav-links a{font-size:17px;padding:7px 0}
      .nav-links a.active:after{left:0;right:auto;width:35px;bottom:3px}
      .menu-toggle{display:block}
      .article-top{padding:35px 0 28px}
      .article-heading h1{font-size:34px}
      .article-layout{padding:35px 0 55px}
      .article-content{font-size:16px}
      .article-content h2{font-size:25px}
      .app-tip{align-items:flex-start;flex-direction:column}
      .related-grid{grid-template-columns:1fr}
    }
    @media(max-width:520px){
      .container{width:calc(100% - 32px)}
      .breadcrumb .current{max-width:190px}
      .article-heading h1{font-size:30px;letter-spacing:-.8px}
      .article-meta{gap:9px 14px}
      .article-tools{align-items:flex-start;flex-direction:column}
      .share-actions{width:100%}
      .share-btn{flex:1}
      .summary-box{padding:18px}
      .app-tip{padding:20px}
      .app-tip .btn{width:100%}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .copyright{flex-direction:column;gap:5px}
      .return-actions .btn{width:100%}
    }

/* roulang page: category1 */
:root{
      --pine:#174b43;
      --pine-deep:#103a34;
      --pine-soft:#dceae4;
      --lime:#c8e94b;
      --lime-light:#e8f6a7;
      --clay:#e87b4c;
      --cream:#f6f5ef;
      --white:#fff;
      --ink:#1c2623;
      --muted:#65716d;
      --line:#dce4df;
      --radius:14px;
      --radius-lg:20px;
      --shadow:0 8px 24px rgba(23,75,67,.08);
      --shadow-hover:0 13px 30px rgba(23,75,67,.14);
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC","Hiragino Sans GB",Arial,sans-serif;font-size:15px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    a:hover{color:var(--pine)}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 64px));margin:0 auto}
    .site-header{height:78px;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px);transition:.25s}
    .navbar{height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;color:var(--pine);font-size:17px;font-weight:800;letter-spacing:-.4px;white-space:nowrap}
    .logo-mark{width:34px;height:34px;border-radius:10px;background:var(--pine);position:relative;overflow:hidden;display:inline-block}
    .logo-mark:before,.logo-mark:after{content:"";position:absolute;border:2px solid var(--lime);border-radius:50%}
    .logo-mark:before{width:24px;height:14px;left:5px;top:10px}
    .logo-mark:after{width:2px;height:24px;left:15px;top:5px;border-width:0 2px 0 0;border-radius:0}
    .nav-links{display:flex;align-items:center;gap:24px;margin-left:auto}
    .nav-links a{min-height:44px;display:flex;align-items:center;color:var(--muted);font-weight:600;position:relative}
    .nav-links a:hover,.nav-links a.active{color:var(--pine)}
    .nav-links a.active:after{content:"";position:absolute;left:0;right:0;bottom:7px;height:3px;background:var(--lime);border-radius:3px}
    .header-action{min-height:44px;padding:10px 16px;border-radius:9px;background:var(--pine);color:#fff;font-weight:700}
    .header-action:hover{background:var(--pine-deep);color:#fff;box-shadow:var(--shadow)}
    .menu-toggle{display:none;border:0;background:transparent;color:var(--pine);font-size:25px;width:44px;height:44px}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:9px;border:1px solid transparent;font-weight:800;transition:.2s}
    .btn-primary{background:var(--pine);color:#fff}
    .btn-primary:hover{background:var(--pine-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}
    .btn-outline{background:#fff;border-color:var(--pine);color:var(--pine)}
    .btn-outline:hover{background:var(--pine-soft)}
    .btn:focus,a:focus,button:focus{outline:3px solid rgba(200,233,75,.75);outline-offset:3px}
    .page-banner{padding:54px 0 48px;background:#fff;border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:22px}
    .breadcrumb a:hover{text-decoration:underline}
    .breadcrumb .current{color:var(--pine)}
    .banner-grid{display:flex;justify-content:space-between;align-items:end;gap:30px}
    .eyebrow,.section-kicker{color:var(--pine);font-size:12px;font-weight:800;letter-spacing:1.3px}
    .eyebrow{display:flex;align-items:center;gap:8px;margin-bottom:14px}
    .eyebrow:before{content:"";width:27px;height:3px;background:var(--lime);border-radius:3px}
    h1,h2,h3,p{margin-top:0}
    h1{max-width:760px;margin-bottom:14px;color:var(--pine-deep);font-size:clamp(34px,5vw,54px);line-height:1.18;letter-spacing:-1.8px}
    .banner-copy{max-width:680px;color:var(--muted);font-size:17px}
    .banner-meta{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}
    .status-box{min-width:145px;padding:14px 17px;background:var(--cream);border:1px solid var(--line);border-radius:12px}
    .status-box small{display:block;color:var(--muted);font-size:12px}
    .status-box strong{display:block;color:var(--pine);font-size:15px;margin-top:3px}
    .section{padding:70px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:27px}
    .section-head h2{margin:7px 0 0;color:var(--pine-deep);font-size:31px;line-height:1.25;letter-spacing:-1px}
    .section-head p{max-width:500px;margin-bottom:0;color:var(--muted)}
    .filter-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:16px 20px;background:var(--pine);border-radius:var(--radius);color:#fff}
    .filter-title{font-weight:800;margin-right:8px}
    .filter-tag{padding:7px 15px;border:1px solid rgba(255,255,255,.26);border-radius:8px;color:#e8f1ec;font-size:13px}
    .filter-tag.active{background:var(--lime);border-color:var(--lime);color:var(--pine-deep);font-weight:800}
    .channel-panel{margin-top:18px;padding:20px;background:#eef5ef;border:1px solid #cbded5;border-radius:var(--radius);display:flex;align-items:center;justify-content:space-between;gap:20px}
    .channel-panel strong{color:var(--pine-deep);font-size:16px}
    .channel-panel p{margin:3px 0 0;color:var(--muted)}
    .channel-links{display:flex;gap:9px;flex-wrap:wrap}
    .channel-links a{padding:9px 13px;background:#fff;border:1px solid var(--line);border-radius:9px;color:var(--pine);font-weight:700;font-size:13px;white-space:nowrap}
    .channel-links a:hover{border-color:var(--pine);background:var(--pine-soft)}
    .focus-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}
    .feature-card,.article-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.2s}
    .feature-card:hover,.article-card:hover{transform:translateY(-3px);border-color:#a9c8bd;box-shadow:var(--shadow-hover)}
    .feature-card{min-height:310px;padding:31px;position:relative;overflow:hidden;background:linear-gradient(135deg,#fff 0%,#edf5ef 100%)}
    .feature-card:after{content:"";position:absolute;width:230px;height:230px;right:-78px;bottom:-92px;border:1px solid #b8d1c6;border-radius:50%}
    .feature-card h3{max-width:570px;margin:15px 0 12px;color:var(--pine-deep);font-size:27px;line-height:1.35}
    .feature-card p{max-width:570px;color:var(--muted)}
    .mini-stack{display:grid;gap:18px}
    .mini-card{min-height:146px;padding:23px;background:var(--cream);border:1px solid var(--line);border-radius:var(--radius);transition:.2s}
    .mini-card:hover{transform:translateX(4px);border-color:var(--pine);box-shadow:var(--shadow)}
    .tag{display:inline-flex;padding:4px 9px;border-radius:6px;background:var(--pine-soft);color:var(--pine);font-size:12px;font-weight:800}
    .tag.clay{background:#fbe5dc;color:#a9512f}
    .card-title{margin:12px 0 7px;color:var(--pine-deep);font-size:19px;line-height:1.4}
    .mini-card .card-title{font-size:17px}
    .card-summary{color:var(--muted);font-size:14px;margin-bottom:15px}
    .meta{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:12px}
    .read-link{display:inline-flex;align-items:center;gap:8px;color:var(--pine);font-size:13px;font-weight:800}
    .read-link span{transition:.2s}
    .read-link:hover span{transform:translateX(4px)}
    .feature-foot{position:absolute;left:31px;bottom:26px;right:31px;display:flex;justify-content:space-between;align-items:center;z-index:1}
    .news-section{background:#fff}
    .news-layout{display:grid;grid-template-columns:240px 1fr;gap:42px}
    .news-side{padding-right:25px;border-right:1px solid var(--line)}
    .news-side h3{color:var(--pine-deep);font-size:21px;margin:8px 0 10px}
    .news-side p{color:var(--muted);font-size:14px}
    .news-side .side-mark{width:46px;height:5px;background:var(--lime);border-radius:4px}
    .news-list{display:grid;gap:13px}
    .list-card{display:grid;grid-template-columns:1fr auto;gap:20px;padding:20px 21px}
    .list-card .card-title{margin:8px 0 5px;font-size:18px}
    .list-card .card-summary{margin-bottom:7px}
    .empty-state{padding:48px 25px;text-align:center;border:1px dashed #b9cbc3;border-radius:var(--radius);color:var(--muted)}
    .empty-icon{width:42px;height:42px;margin:0 auto 12px;border:2px solid #9ab7aa;border-radius:12px;position:relative}
    .empty-icon:after{content:"";position:absolute;width:17px;height:2px;background:#9ab7aa;left:11px;top:19px}
    .timeline-section{background:var(--pine-soft)}
    .timeline{display:grid;grid-template-columns:repeat(3,1fr);position:relative;gap:22px}
    .timeline:before{content:"";position:absolute;left:10%;right:10%;top:21px;border-top:2px dashed #9ab9aa}
    .time-item{position:relative;padding-top:53px}
    .time-dot{position:absolute;top:11px;left:0;width:21px;height:21px;border:5px solid var(--pine-soft);background:var(--lime);border-radius:50%;z-index:1}
    .time-item h3{color:var(--pine-deep);font-size:18px;margin-bottom:7px}
    .time-item p{color:var(--muted);font-size:14px;margin-bottom:12px}
    .tip-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .tip-card{padding:25px;background:#fff;border-radius:var(--radius);border:1px solid var(--line)}
    .tip-number{color:var(--clay);font-size:28px;font-weight:800;line-height:1}
    .tip-card h3{font-size:17px;color:var(--pine);margin:15px 0 7px}
    .tip-card p{margin-bottom:0;color:var(--muted);font-size:14px}
    .faq-section{background:#fff}
    .faq-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .faq-item{padding:22px;background:var(--cream);border:1px solid var(--line);border-radius:var(--radius)}
    .faq-item summary{cursor:pointer;color:var(--pine-deep);font-weight:800;padding-right:20px;position:relative}
    .faq-item summary::marker{color:var(--clay)}
    .faq-item p{color:var(--muted);font-size:14px;margin:14px 0 0}
    .return-section{padding:62px 0 76px}
    .return-box{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:30px 34px;background:#fff;border:1px solid #c8d8d0;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
    .return-box h2{margin:0 0 7px;color:var(--pine-deep);font-size:25px}
    .return-box p{margin:0;color:var(--muted)}
    .return-actions{display:flex;gap:10px;flex-wrap:wrap}
    .responsibility{margin-top:18px;padding:16px 20px;border-left:4px solid var(--clay);background:#fbe8df;color:#754632;font-size:13px}
    .site-footer{padding:54px 0 22px;background:var(--pine);color:#e7f0eb}
    .site-footer .logo{color:#fff}
    .site-footer .logo-mark{background:#fff}
    .site-footer .logo-mark:before,.site-footer .logo-mark:after{border-color:var(--pine)}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px;padding-bottom:40px}
    .footer-note{max-width:315px;margin:16px 0 0;color:#b8cec4;font-size:13px;line-height:1.8}
    .footer-title{margin-bottom:13px;color:var(--lime);font-weight:800}
    .site-footer ul{padding:0;margin:0;list-style:none}
    .site-footer li{margin:7px 0}
    .site-footer li a{color:#c5d8d0;font-size:13px}
    .site-footer li a:hover{color:var(--lime)}
    .copyright{display:flex;justify-content:space-between;gap:15px;padding-top:18px;border-top:1px solid rgba(255,255,255,.16);color:#a9c2b8;font-size:12px}
    @media(max-width:960px){
      .container{width:min(var(--max),calc(100% - 48px))}
      .header-action{display:none}
      .hero-grid,.focus-grid{grid-template-columns:1fr}
      .banner-grid{display:block}
      .banner-meta{justify-content:flex-start;margin-top:24px}
      .news-layout{grid-template-columns:1fr}
      .news-side{padding:0 0 20px;border-right:0;border-bottom:1px solid var(--line)}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{width:calc(100% - 32px)}
      .site-header,.navbar{height:68px}
      .nav-links{display:none;position:absolute;left:0;right:0;top:68px;padding:23px 24px 28px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:4px}
      .nav-links.open{display:flex}
      .nav-links a{font-size:18px}
      .menu-toggle{display:block;margin-left:auto}
      .page-banner{padding:38px 0 35px}
      h1{font-size:36px}
      .section{padding:54px 0}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .channel-panel{display:block}
      .channel-links{margin-top:15px}
      .timeline,.tip-grid,.faq-grid{grid-template-columns:1fr}
      .timeline:before{left:10px;top:20px;bottom:20px;right:auto;border-top:0;border-left:2px dashed #9ab9aa}
      .time-item{padding:0 0 0 50px;min-height:105px}
      .time-dot{left:0;top:2px}
      .list-card{grid-template-columns:1fr;gap:10px}
      .return-box{display:block;padding:25px}
      .return-actions{margin-top:20px}
    }
    @media(max-width:480px){
      .banner-meta{display:grid;grid-template-columns:1fr 1fr}
      .status-box{min-width:0}
      .filter-bar{padding:15px}
      .filter-title{width:100%;margin:0 0 3px}
      .feature-card{padding:23px;min-height:320px}
      .feature-card h3{font-size:23px}
      .feature-foot{left:23px;right:23px;bottom:22px}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:6px}
      .return-actions .btn{width:100%}
    }

/* roulang page: category2 */
:root{
      --pine:#174b43;--pine-deep:#103a34;--pine-soft:#dceae4;--lime:#c8e94b;
      --lime-light:#e8f6a7;--clay:#e87b4c;--cream:#f6f5ef;--white:#fff;
      --ink:#1c2623;--muted:#65716d;--line:#dce4df;--radius:14px;
      --radius-lg:20px;--shadow:0 8px 24px rgba(23,75,67,.08);
      --shadow-hover:0 13px 30px rgba(23,75,67,.14);--max:1200px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC","Hiragino Sans GB",Arial,sans-serif;font-size:15px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    a:hover{color:var(--pine)}
    img{max-width:100%;display:block}
    button{font:inherit;cursor:pointer}
    .container{width:min(var(--max),calc(100% - 64px));margin:auto}
    .site-header{height:78px;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30;backdrop-filter:blur(12px);transition:.25s}
    .navbar{height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;color:var(--pine);font-size:17px;font-weight:800;white-space:nowrap;letter-spacing:-.4px}
    .logo-mark{width:34px;height:34px;border-radius:10px;background:var(--pine);position:relative;overflow:hidden;display:inline-block}
    .logo-mark:before,.logo-mark:after{content:"";position:absolute;border:2px solid var(--lime);border-radius:50%}
    .logo-mark:before{width:24px;height:14px;left:5px;top:10px}
    .logo-mark:after{width:2px;height:24px;left:15px;top:5px;border-width:0 2px 0 0;border-radius:0}
    .nav-links{display:flex;align-items:center;gap:24px;margin-left:auto}
    .nav-links a{min-height:44px;display:flex;align-items:center;color:var(--muted);font-weight:600;position:relative}
    .nav-links a:hover,.nav-links a.active{color:var(--pine)}
    .nav-links a.active:after{content:"";position:absolute;height:3px;background:var(--lime);bottom:7px;left:0;right:0;border-radius:3px}
    .header-action{padding:10px 16px;border-radius:9px;background:var(--pine);color:#fff;font-weight:700;min-height:44px}
    .header-action:hover{background:var(--pine-deep);color:#fff;box-shadow:var(--shadow)}
    .menu-toggle{display:none;border:0;background:transparent;color:var(--pine);font-size:25px;width:44px;height:44px}
    .section{padding:78px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}
    .section-kicker{font-size:12px;color:var(--pine);font-weight:800;letter-spacing:1.5px}
    .section-head h2{margin:7px 0 0;color:var(--pine-deep);font-size:32px;line-height:1.25;letter-spacing:-1px}
    .section-head p{max-width:520px;margin:0;color:var(--muted)}
    .subtle{color:var(--muted)}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:9px;border:1px solid transparent;font-weight:800;transition:.2s}
    .btn-primary{background:var(--pine);color:#fff}
    .btn-primary:hover{background:var(--pine-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}
    .btn-lime{background:var(--lime);color:var(--pine-deep)}
    .btn-lime:hover{background:#d9f36c;color:var(--pine-deep);transform:translateY(-2px)}
    .btn-outline{border-color:var(--pine);color:var(--pine);background:#fff}
    .btn-outline:hover{background:var(--pine-soft)}
    .btn:focus,a:focus,button:focus{outline:3px solid rgba(200,233,75,.75);outline-offset:3px}
    .page-band{padding:52px 0 42px;background:#fff;border-bottom:1px solid var(--line)}
    .crumb{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:18px}
    .crumb a:hover{color:var(--pine)}
    .page-band h1{max-width:760px;margin:0 0 16px;color:var(--pine-deep);font-size:clamp(34px,5vw,52px);line-height:1.2;letter-spacing:-1.8px}
    .page-intro{max-width:720px;color:var(--muted);font-size:17px;margin:0}
    .page-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .tag{display:inline-flex;align-items:center;min-height:30px;padding:3px 11px;border-radius:7px;background:var(--pine-soft);color:var(--pine);font-size:12px;font-weight:700}
    .tag.lime{background:var(--lime-light)}
    .tag.clay{background:#fbe2d7;color:#9a4b2d}
    .device-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .device-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;min-height:205px;transition:.2s}
    .device-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#a9c8bd}
    .device-icon{width:42px;height:42px;border-radius:12px;background:var(--pine-soft);color:var(--pine);display:grid;place-items:center;font-weight:800;font-size:18px;margin-bottom:18px}
    .device-card h3{margin:0 0 8px;color:var(--pine);font-size:20px}
    .device-card p{margin:0 0 16px;color:var(--muted);font-size:14px}
    .text-link{color:var(--pine);font-weight:800;font-size:13px}
    .text-link span{display:inline-block;transition:.2s;margin-left:5px}
    .text-link:hover span{transform:translateX(4px)}
    .steps-wrap{background:var(--pine);border-radius:var(--radius-lg);padding:36px;color:#fff}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
    .step{position:relative;padding-left:58px;min-height:115px}
    .step:not(:last-child):after{content:"";position:absolute;top:23px;right:-12px;width:24px;border-top:1px dashed rgba(200,233,75,.7)}
    .step-no{position:absolute;left:0;top:0;width:40px;height:40px;border-radius:12px;background:var(--lime);color:var(--pine-deep);display:grid;place-items:center;font-size:18px;font-weight:900}
    .step h3{margin:0 0 8px;font-size:17px;color:#fff}
    .step p{margin:0;color:#c4d7d0;font-size:13px}
    .preview-section{background:#fff}
    .preview-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
    .preview-card{border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;background:var(--cream);display:flex;gap:24px;align-items:center}
    .mock-phone{width:152px;height:275px;border:7px solid var(--pine-deep);border-radius:24px;background:#eef5ef;padding:14px 10px;flex:none;box-shadow:var(--shadow)}
    .mock-top{height:18px;border-bottom:1px solid #c5d8d0;color:var(--pine);font-weight:800;font-size:10px}
    .mock-line{height:9px;background:#fff;border-radius:5px;margin:14px 0 8px}
    .mock-line.short{width:64%;margin-top:0}
    .mock-box{background:#fff;border-left:4px solid var(--lime);border-radius:7px;padding:9px;margin:8px 0;color:var(--pine);font-size:10px}
    .preview-copy h3{font-size:20px;color:var(--pine-deep);margin:0 0 8px}
    .preview-copy p{color:var(--muted);font-size:14px;margin:0 0 17px}
    .release-table{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
    .release-table th,.release-table td{padding:17px 20px;text-align:left;border-bottom:1px solid var(--line)}
    .release-table th{background:var(--pine-soft);color:var(--pine);font-size:13px}
    .release-table td{color:var(--muted)}
    .release-table tr:last-child td{border-bottom:0}
    .version{color:var(--pine-deep);font-weight:800}
    .faq-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:0 20px}
    .faq-item summary{min-height:62px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;color:var(--pine-deep);font-weight:800;list-style:none}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"+";font-size:23px;color:var(--pine)}
    .faq-item[open] summary:after{content:"−"}
    .faq-answer{border-top:1px solid var(--line);padding:15px 0 18px;color:var(--muted);font-size:14px}
    .security-card{display:grid;grid-template-columns:130px 1fr;gap:26px;align-items:center;background:#fbe8df;border:1px solid #f1c9b7;border-radius:var(--radius-lg);padding:31px}
    .security-mark{width:82px;height:82px;border-radius:24px;background:var(--clay);color:#fff;display:grid;place-items:center;font-size:35px}
    .security-card h2{margin:0 0 8px;color:#713820;font-size:25px}
    .security-card p{margin:0;color:#80543f}
    .check-list{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:20px 0 0;padding:0;list-style:none}
    .check-list li{color:#713820;font-size:14px;font-weight:700}
    .check-list li:before{content:"✓";display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;background:#fff;color:var(--clay);margin-right:7px}
    .related{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .guide-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;min-height:180px;display:flex;flex-direction:column;transition:.2s}
    .guide-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#a9c8bd}
    .guide-card h3{font-size:17px;color:var(--pine-deep);line-height:1.45;margin:13px 0 8px}
    .guide-card p{font-size:13px;color:var(--muted);margin:0 0 16px}
    .guide-card .text-link{margin-top:auto}
    .more-link{text-align:center;margin-top:28px}
    .site-footer{background:var(--pine);color:#e7f0ec;padding:54px 0 22px}
    .site-footer .logo{color:#fff}
    .footer-grid{display:grid;grid-template-columns:1.4fr .8fr 1fr 1.25fr;gap:36px;padding-bottom:38px}
    .footer-note{color:#b8d0c7;font-size:13px;line-height:1.8;margin:16px 0 0}
    .footer-title{color:var(--lime);font-weight:800;margin-bottom:13px}
    .site-footer ul{list-style:none;padding:0;margin:0}
    .site-footer li{margin:7px 0}
    .site-footer li a{color:#d6e5df;font-size:13px}
    .site-footer li a:hover{color:var(--lime)}
    .copyright{border-top:1px solid rgba(255,255,255,.18);padding-top:19px;display:flex;justify-content:space-between;gap:20px;color:#a9c4ba;font-size:12px}
    @media(max-width:960px){
      .container{width:min(var(--max),calc(100% - 48px))}
      .header-action{display:none}.nav-links{gap:15px}
      .device-grid,.related{grid-template-columns:repeat(2,1fr)}
      .steps{grid-template-columns:repeat(2,1fr)}
      .step:nth-child(2):after{display:none}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{width:calc(100% - 32px)}
      .site-header,.navbar{height:68px}.menu-toggle{display:block;margin-left:auto}
      .nav-links{display:none;position:fixed;inset:68px 0 0;background:var(--cream);padding:28px 24px;flex-direction:column;align-items:stretch;gap:4px}
      .nav-links.open{display:flex}.nav-links a{font-size:19px;padding:8px 0;border-bottom:1px solid var(--line)}
      .nav-links a.active:after{left:auto;width:34px;right:0;bottom:17px}
      .page-band{padding:38px 0 32px}.page-band h1{font-size:36px}
      .section{padding:58px 0}.section-head{display:block}.section-head p{margin-top:12px}
      .preview-grid,.faq-list{grid-template-columns:1fr}
      .security-card{grid-template-columns:1fr;padding:25px}
      .check-list{grid-template-columns:1fr}
    }
    @media(max-width:520px){
      .logo{font-size:14px}.logo-mark{width:30px;height:30px}
      .device-grid,.related,.steps{grid-template-columns:1fr}
      .step:not(:last-child):after{display:none}
      .preview-card{display:block}.mock-phone{margin:0 auto 20px}
      .release-table{font-size:13px}.release-table th,.release-table td{padding:12px 10px}
      .copyright,.footer-grid{display:block}.copyright span{display:block;margin-top:7px}
      .footer-grid>div{margin-bottom:25px}
      .btn{width:100%}
    }

/* roulang page: category3 */
:root{
      --pine:#174b43;
      --pine-deep:#103a34;
      --pine-soft:#dceae4;
      --lime:#c8e94b;
      --lime-light:#e8f6a7;
      --clay:#e87b4c;
      --cream:#f6f5ef;
      --white:#fff;
      --ink:#1c2623;
      --muted:#65716d;
      --line:#dce4df;
      --radius:14px;
      --radius-lg:20px;
      --shadow:0 8px 24px rgba(23,75,67,.08);
      --shadow-hover:0 13px 30px rgba(23,75,67,.14);
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC","Hiragino Sans GB",Arial,sans-serif;background:var(--cream);color:var(--ink);font-size:15px;line-height:1.75}
    a{color:inherit;text-decoration:none}
    a:hover{color:var(--pine)}
    img{display:block;max-width:100%}
    button{font:inherit;cursor:pointer}
    .container{width:min(var(--max),calc(100% - 64px));margin:0 auto}
    .site-header{height:78px;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30;backdrop-filter:blur(12px);transition:.25s}
    .navbar{height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;color:var(--pine);font-size:17px;font-weight:800;letter-spacing:-.4px;white-space:nowrap}
    .logo-mark{width:34px;height:34px;border-radius:10px;background:var(--pine);position:relative;overflow:hidden;display:inline-block}
    .logo-mark:before,.logo-mark:after{content:"";position:absolute;border:2px solid var(--lime);border-radius:50%}
    .logo-mark:before{width:24px;height:14px;left:5px;top:10px}
    .logo-mark:after{width:2px;height:24px;left:15px;top:5px;border-width:0 2px 0 0;border-radius:0}
    .nav-links{display:flex;align-items:center;gap:24px;margin-left:auto}
    .nav-links a{min-height:44px;display:flex;align-items:center;color:var(--muted);font-weight:600;position:relative}
    .nav-links a:hover,.nav-links a.active{color:var(--pine)}
    .nav-links a.active:after{content:"";position:absolute;height:3px;background:var(--lime);bottom:7px;left:0;right:0;border-radius:3px}
    .header-action{padding:10px 16px;border-radius:9px;background:var(--pine);color:#fff;font-weight:700;min-height:44px}
    .header-action:hover{background:var(--pine-deep);color:#fff;box-shadow:var(--shadow)}
    .menu-toggle{display:none;border:0;background:transparent;color:var(--pine);font-size:25px;width:44px;height:44px}
    .page-head{padding:58px 0 44px;background:#fff;border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:22px}
    .breadcrumb span{color:#a2afa9}
    .page-head-grid{display:flex;justify-content:space-between;align-items:end;gap:35px}
    .section-kicker{color:var(--pine);font-size:12px;font-weight:800;letter-spacing:1.5px}
    .page-head h1{font-size:clamp(34px,4.8vw,54px);line-height:1.2;letter-spacing:-1.8px;color:var(--pine-deep);margin:10px 0 16px;max-width:760px}
    .page-intro{max-width:710px;color:var(--muted);font-size:17px;margin:0}
    .head-facts{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
    .tag{display:inline-flex;align-items:center;min-height:30px;padding:4px 11px;border-radius:7px;background:var(--pine-soft);color:var(--pine);font-size:12px;font-weight:800}
    .tag.warm{background:#fae1d6;color:#9d482d}
    .section{padding:76px 0}
    .section.alt{background:#fff}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}
    .section-head h2{margin:7px 0 0;color:var(--pine-deep);font-size:31px;line-height:1.3;letter-spacing:-1px}
    .section-head p{max-width:520px;color:var(--muted);margin:0}
    .route-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .route-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px;min-height:170px;position:relative;transition:.2s}
    .route-card:hover,.tutorial-card:hover,.term-card:hover{transform:translateY(-3px);border-color:#a9c8bd;box-shadow:var(--shadow-hover)}
    .route-card strong{font-size:34px;color:var(--lime);line-height:1}
    .route-card h3{font-size:17px;color:var(--pine);margin:18px 0 6px}
    .route-card p{color:var(--muted);font-size:13px;margin:0}
    .tutorial-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .tutorial-card{display:grid;grid-template-columns:68px 1fr auto;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:21px 22px;transition:.2s}
    .tutorial-number{width:52px;height:52px;border-radius:12px;background:var(--pine);color:var(--lime);display:grid;place-items:center;font-size:20px;font-weight:800}
    .tutorial-card h3{margin:0 0 5px;font-size:17px;color:var(--pine-deep)}
    .tutorial-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}
    .read-link{color:var(--pine);font-weight:800;white-space:nowrap}
    .read-link:after{content:" →";color:var(--clay);transition:.2s}
    .tutorial-card:hover .read-link:after{padding-left:4px}
    .wireframe-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
    .wireframe{background:#eef4ef;border:1px solid #c9dbd2;border-radius:18px;padding:22px;min-height:300px}
    .wire-top{height:38px;background:#fff;border:1px solid var(--line);border-radius:8px;margin-bottom:14px;display:flex;align-items:center;padding:0 13px;gap:9px}
    .wire-dot{width:8px;height:8px;border-radius:50%;background:var(--lime)}
    .wire-body{display:grid;grid-template-columns:75px 1fr;gap:14px;height:205px}
    .wire-side,.wire-main{background:#fff;border:1px solid var(--line);border-radius:10px;padding:13px}
    .wire-side i{display:block;height:9px;background:var(--pine-soft);border-radius:4px;margin-bottom:14px}
    .wire-main .wire-line{height:12px;background:#dfe9e3;border-radius:5px;margin-bottom:12px}
    .wire-main .wire-line.short{width:48%}
    .wire-main .wire-boxes{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:20px}
    .wire-boxes span{height:70px;background:var(--pine-soft);border-radius:8px}
    .wire-copy h2{font-size:30px;line-height:1.3;color:var(--pine-deep);margin:8px 0 15px}
    .wire-copy p{color:var(--muted);margin-bottom:20px}
    .check-section{background:#fae8df}
    .check-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:38px;align-items:center}
    .check-title{display:flex;align-items:flex-start;gap:17px}
    .lock{width:54px;height:54px;border-radius:15px;background:var(--clay);color:#fff;display:grid;place-items:center;font-size:25px;flex:none}
    .check-title h2{margin:0;color:var(--pine-deep);font-size:29px;line-height:1.3}
    .check-title p{color:#765d54;margin:10px 0 0}
    .check-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .check-item{background:rgba(255,255,255,.7);border:1px solid rgba(157,72,45,.15);border-radius:12px;padding:18px}
    .check-item b{color:var(--pine);display:block;margin-bottom:4px}
    .check-item span{font-size:13px;color:#765d54}
    .terms{background:var(--pine);color:#fff}
    .terms .section-kicker,.terms .section-head h2{color:#fff}
    .terms .section-head p{color:#b8d0c7}
    .term-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .term-card{background:#21594f;border:1px solid #397267;border-radius:var(--radius);padding:20px;transition:.2s}
    .term-card h3{font-size:16px;color:var(--lime);margin:0 0 7px}
    .term-card p{font-size:13px;color:#d6e5df;margin:0}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0 20px}
    .faq-item summary{min-height:60px;display:flex;align-items:center;cursor:pointer;color:var(--pine-deep);font-weight:800;list-style:none}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"+";margin-left:auto;color:var(--clay);font-size:22px}
    .faq-item[open] summary:after{content:"−"}
    .faq-answer{color:var(--muted);font-size:14px;padding:0 0 18px}
    .return-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:34px;display:flex;justify-content:space-between;align-items:center;gap:25px}
    .return-card h2{color:var(--pine-deep);font-size:28px;margin:0 0 7px}
    .return-card p{color:var(--muted);margin:0}
    .button-row{display:flex;gap:11px;flex-wrap:wrap}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:9px;border:1px solid transparent;font-weight:800;transition:.2s}
    .btn-primary{background:var(--pine);color:#fff}
    .btn-primary:hover{background:var(--pine-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}
    .btn-lime{background:var(--lime);color:var(--pine-deep)}
    .btn-lime:hover{background:#d9f36c;transform:translateY(-2px)}
    .btn-outline{border-color:var(--pine);color:var(--pine);background:#fff}
    .btn-outline:hover{background:var(--pine-soft)}
    .btn:focus,a:focus,button:focus{outline:3px solid rgba(200,233,75,.7);outline-offset:3px}
    .responsibility{margin-top:18px;padding:16px 20px;border-left:4px solid var(--lime);background:var(--pine-soft);color:var(--pine-deep);font-size:13px}
    .site-footer{background:var(--pine);color:#dceae4;padding:54px 0 20px}
    .site-footer .logo{color:#fff}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px}
    .footer-note{color:#b8d0c7;font-size:13px;line-height:1.8;margin:15px 0 0}
    .footer-title{color:var(--lime);font-weight:800;margin-bottom:13px}
    .site-footer ul{list-style:none;padding:0;margin:0}
    .site-footer li{margin:7px 0;color:#dceae4;font-size:13px}
    .site-footer li a:hover{color:var(--lime)}
    .copyright{border-top:1px solid rgba(220,234,228,.2);margin-top:38px;padding-top:17px;display:flex;justify-content:space-between;gap:20px;color:#a9c5bb;font-size:12px}
    @media(max-width:960px){
      .container{width:min(var(--max),calc(100% - 48px))}
      .header-action{display:none}
      .nav-links{gap:13px}
      .route-grid{grid-template-columns:repeat(2,1fr)}
      .tutorial-list,.wireframe-wrap,.check-grid{grid-template-columns:1fr}
      .term-grid{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:768px){
      .site-header,.navbar{height:68px}
      .menu-toggle{display:block;margin-left:auto}
      .nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;padding:22px 24px 30px;flex-direction:column;align-items:stretch;gap:5px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
      .nav-links.open{display:flex}
      .nav-links a{font-size:18px;padding:8px 0}
      .page-head{padding:42px 0 35px}
      .page-head-grid,.section-head,.return-card{display:block}
      .head-facts{justify-content:flex-start;margin-top:22px}
      .section{padding:58px 0}
      .section-head h2{font-size:27px;margin-bottom:10px}
      .tutorial-list{gap:12px}
      .tutorial-card{grid-template-columns:52px 1fr}
      .tutorial-card .read-link{grid-column:2}
      .faq-grid{grid-template-columns:1fr}
      .return-card .button-row{margin-top:22px}
      .check-list{grid-template-columns:1fr}
      .copyright{display:block}
      .copyright span{display:block;margin-top:5px}
    }
    @media(max-width:480px){
      .container{width:calc(100% - 32px)}
      .logo{font-size:15px}
      .logo-mark{width:31px;height:31px}
      .route-grid,.term-grid{grid-template-columns:1fr}
      .page-head h1{font-size:34px}
      .page-intro{font-size:15px}
      .tutorial-card{padding:17px}
      .wireframe{padding:14px}
      .wire-body{grid-template-columns:58px 1fr}
      .return-card{padding:25px 20px}
      .button-row .btn{width:100%}
      .footer-grid{grid-template-columns:1fr}
    }