/* roulang page: index */
:root{
  --ink:#123b34;--ink-2:#1d4b42;--lime:#b8d84a;--sage:#dde7df;
  --paper:#f7f5ef;--white:#fff;--text:#1d2421;--muted:#68716d;
  --line:#dfe3dd;--radius:20px;--shadow:0 16px 42px rgba(18,59,52,.09);
  --max:1200px;--ease:220ms ease;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}
a{color:inherit;text-decoration:none;transition:color var(--ease),background var(--ease),transform var(--ease),border-color var(--ease),box-shadow var(--ease)}
img{max-width:100%;display:block}
button,input,textarea,select{font:inherit}
button{cursor:pointer;border:0}
.container{width:min(var(--max),calc(100% - 48px));margin:auto}
.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#79907f;font-weight:700}
.section{padding:92px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:34px}
.section-head h2{font-size:34px;line-height:1.25;letter-spacing:-.03em;color:var(--ink)}
.section-head p{max-width:520px;color:var(--muted);font-size:15px}
.more{font-size:14px;font-weight:700;color:var(--ink);white-space:nowrap}
.more:hover{color:#76931b}
.topbar{background:#0d2c27;color:#cddbd1;font-size:12px}
.topbar .container{height:34px;display:flex;justify-content:space-between;align-items:center}
.topbar span+span{margin-left:25px}
.header{position:sticky;top:0;z-index:20;background:rgba(247,245,239,.94);border-bottom:1px solid rgba(223,227,221,.85);backdrop-filter:blur(12px)}
.nav{height:78px;display:flex;align-items:center;gap:30px}
.logo{display:flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;white-space:nowrap;letter-spacing:-.04em}
.logo-mark{width:34px;height:34px;border-radius:11px;background:var(--ink);position:relative}
.logo-mark:before,.logo-mark:after{content:"";position:absolute;background:var(--lime);border-radius:4px}
.logo-mark:before{width:15px;height:5px;left:9px;top:10px;transform:rotate(45deg)}
.logo-mark:after{width:15px;height:5px;left:9px;top:19px;transform:rotate(-45deg)}
.logo small{display:block;font-size:9px;letter-spacing:.12em;color:#789087;line-height:1.1;margin-top:2px}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links a{padding:9px 11px;font-size:14px;color:#4f5b56;border-radius:9px}
.nav-links a:hover,.nav-links a.active{color:var(--ink);background:var(--sage)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:12px 19px;border-radius:11px;font-size:14px;font-weight:700;border:1px solid transparent;transition:all var(--ease)}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:#1e594e;box-shadow:0 8px 20px rgba(18,59,52,.18);transform:translateY(-2px)}
.btn-lime{background:var(--lime);color:var(--ink)}
.btn-lime:hover{background:#c8e55c;transform:translateY(-2px);box-shadow:0 8px 20px rgba(184,216,74,.2)}
.btn-outline{border-color:#b8c5bb;color:var(--ink);background:transparent}
.btn-outline:hover{border-color:var(--ink);background:#fff}
.menu{display:none;background:var(--sage);color:var(--ink);padding:9px;border-radius:9px}
.hero{padding:86px 0 64px;overflow:hidden;background:var(--paper);position:relative}
.hero:after{content:"";position:absolute;right:-100px;top:60px;width:460px;height:460px;border:1px solid #dce5dc;border-radius:50%;box-shadow:0 0 0 34px rgba(221,231,223,.3),0 0 0 70px rgba(221,231,223,.16);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center;position:relative;z-index:1}
.hero h1{font-size:clamp(42px,5vw,60px);line-height:1.12;letter-spacing:-.065em;color:var(--ink);margin:14px 0 23px}
.hero h1 span{display:block;color:#6a8275;font-size:.56em;letter-spacing:-.02em;margin-top:12px}
.hero-copy{max-width:570px;color:var(--muted);font-size:17px}
.hero-actions{display:flex;gap:12px;margin-top:31px;flex-wrap:wrap}
.trust-row{display:flex;gap:28px;border-top:1px solid var(--line);margin-top:45px;padding-top:22px}
.trust-row b{display:block;color:var(--ink);font-size:14px}.trust-row small{color:var(--muted);font-size:12px}
.device-stage{min-height:390px;background:var(--sage);border-radius:30px;position:relative;padding:32px;display:flex;align-items:center;justify-content:center}
.device{width:210px;height:370px;background:#172d28;border:8px solid #0e211d;border-radius:31px;box-shadow:22px 22px 0 rgba(18,59,52,.1),var(--shadow);padding:17px 12px;color:#fff;position:relative;z-index:2}
.device-notch{width:74px;height:16px;background:#0b1916;border-radius:20px;margin:0 auto 24px}
.screen-title{font-weight:700;font-size:16px;margin-bottom:16px}.screen-date{font-size:10px;color:#b9cec2}
.screen-card{background:#284d43;border-radius:13px;padding:14px;margin:16px 0}
.screen-card strong{display:block;font-size:23px;color:var(--lime);line-height:1.2}.screen-line{height:7px;background:#628074;border-radius:8px;margin-top:11px;width:78%}
.screen-list{display:grid;gap:10px}.screen-item{height:38px;border:1px solid #496b61;border-radius:9px;padding:8px;font-size:10px;color:#c4d5cc}
.qr-card{position:absolute;right:34px;bottom:36px;background:#fff;padding:18px;border-radius:17px;box-shadow:var(--shadow);width:170px;z-index:3}.qr{width:86px;height:86px;margin:auto;background:repeating-linear-gradient(45deg,#123b34 0 4px,#fff 4px 8px);border:7px solid #fff;outline:1px solid var(--line)}.qr-card b{display:block;text-align:center;color:var(--ink);font-size:13px;margin-top:12px}.version{position:absolute;left:30px;top:34px;background:#fff;border-radius:13px;padding:13px 15px;box-shadow:var(--shadow);font-size:12px;color:var(--muted)}.version strong{display:block;color:var(--ink);font-size:18px}
.status-band{background:var(--ink);color:#fff;padding:25px 0}
.status-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px}.status-item{padding:8px 25px;border-right:1px solid rgba(255,255,255,.14)}.status-item:last-child{border:0}.status-item small{color:#a8bdb2;font-size:12px}.status-item strong{display:block;font-size:21px;color:var(--lime);font-family:ui-monospace,monospace}
.feature-grid{display:grid;grid-template-columns:260px 1fr;gap:60px}.feature-index{font-size:78px;color:var(--lime);font-weight:800;line-height:1}.feature-index h2{font-size:33px;color:var(--ink);line-height:1.2;margin-top:16px}.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}.feature-card{padding:25px;border:1px solid var(--line);background:#fff;border-radius:18px;min-height:170px;transition:all var(--ease)}.feature-card:hover,.info-card:hover,.channel:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b8cbbd}.icon{width:36px;height:36px;border-radius:11px;background:var(--sage);color:var(--ink);display:grid;place-items:center;font-weight:800;margin-bottom:17px}.feature-card h3{font-size:19px;color:var(--ink);margin-bottom:6px}.feature-card p{color:var(--muted);font-size:14px}.feature-card a{display:inline-block;margin-top:14px;font-size:13px;font-weight:700;color:#76931b}
.download{background:var(--ink);color:#fff;border-radius:28px;padding:57px 64px;position:relative;overflow:hidden}.download:after{content:"";position:absolute;width:390px;height:390px;border:1px solid rgba(184,216,74,.18);border-radius:50%;right:-80px;top:-100px}.download-grid{display:grid;grid-template-columns:1fr 360px;gap:60px;align-items:center;position:relative;z-index:1}.download h2{font-size:35px;line-height:1.25;margin:10px 0 14px}.download p{color:#bfd0c5;max-width:560px}.platforms{display:flex;gap:9px;margin:25px 0 19px;flex-wrap:wrap}.platform{border:1px solid #527067;border-radius:9px;padding:8px 13px;font-size:13px;color:#dce9df}.platform.active{background:var(--lime);color:var(--ink);border-color:var(--lime)}.download-meta{display:flex;gap:25px;color:#aac0b3;font-size:12px}.download-actions{margin-top:25px}.download-visual{height:230px;display:flex;align-items:center;justify-content:center}.mini-phone{width:118px;height:214px;border:6px solid #091b17;background:#274b41;border-radius:22px;transform:rotate(8deg);padding:20px 10px}.mini-phone+ .mini-phone{transform:rotate(-8deg) translate(-18px,18px);background:#fff;border-color:#dce6dc}.mini-phone div{height:9px;border-radius:8px;background:var(--lime);margin-bottom:13px}.mini-phone+ .mini-phone div{background:#b5cbbd}.info-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:25px}.lead-news{min-height:275px;background:var(--ink);color:#fff;border-radius:22px;padding:30px;display:flex;flex-direction:column;justify-content:end}.lead-news h3{font-size:25px;line-height:1.35;margin:12px 0}.lead-news p{color:#b8ccc0;font-size:14px}.badge{display:inline-flex;width:max-content;padding:4px 9px;border-radius:99px;background:var(--sage);color:var(--ink);font-size:11px;font-weight:700}.lead-news .badge{background:rgba(184,216,74,.18);color:var(--lime)}.news-list{display:grid;gap:0;border-top:1px solid var(--line)}.news-item{padding:16px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:78px 1fr 20px;gap:12px;align-items:center}.news-item time{font-size:12px;color:#83918a}.news-item h3{font-size:16px;line-height:1.4;color:var(--ink)}.news-item p{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.arrow{color:#7b941d;font-size:18px}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}.time-node{padding:24px 22px 5px 0;border-right:1px solid var(--line);margin-right:22px;position:relative}.time-node:last-child{border:0}.time-node:before{content:"";width:11px;height:11px;background:#a9b8ad;border:3px solid var(--paper);box-shadow:0 0 0 1px #a9b8ad;border-radius:50%;position:absolute;top:-6px;left:0}.time-node.current:before{background:var(--lime);box-shadow:0 0 0 1px var(--lime)}.time-node h3{font-size:20px;color:var(--ink);margin:12px 0 3px}.time-node time{font-size:12px;color:var(--muted)}.time-node p{font-size:13px;color:var(--muted);margin-top:12px}.time-node a{font-size:13px;color:#76931b;font-weight:700;display:block;margin-top:14px}
.steps{background:#eaf0e9}.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.step{position:relative;padding:25px 22px;background:#fff;border-radius:18px;border:1px solid var(--line)}.step-num{font-size:40px;line-height:1;color:#9ab72d;font-weight:800}.step h3{color:var(--ink);font-size:18px;margin:17px 0 7px}.step p{font-size:14px;color:var(--muted)}
.guide-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.guide{padding:23px;background:#fff;border-radius:18px;border:1px solid var(--line)}.guide h3{font-size:17px;color:var(--ink);margin:13px 0 6px}.guide p{font-size:13px;color:var(--muted)}.guide a{display:block;margin-top:15px;color:#76931b;font-weight:700;font-size:13px}
.announcement{background:var(--sage)}.notice-list{display:grid;gap:12px}.notice{background:#fff;border-radius:16px;padding:18px 22px;display:grid;grid-template-columns:100px 1fr auto;gap:20px;align-items:center;border:1px solid #d3dfd5}.notice time{font-size:21px;font-weight:800;color:var(--ink)}.notice h3{font-size:16px;color:var(--ink)}.notice p{font-size:13px;color:var(--muted)}.notice a{font-size:13px;color:#76931b;font-weight:700}
.security{background:#dce9de}.security-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:16px}.security-card{background:#fff;padding:28px;border-radius:20px;border:1px solid #cbdacc}.security-card.large{background:var(--ink);color:#fff}.security-card h3{color:var(--ink);font-size:20px;margin:14px 0 8px}.security-card.large h3{color:#fff}.security-card p{color:var(--muted);font-size:14px}.security-card.large p{color:#bdd0c5}.security-card a{display:inline-block;margin-top:18px;color:#78951d;font-size:13px;font-weight:700}
.scenes{display:grid;grid-template-columns:250px 1fr;gap:38px}.scene-tabs{display:grid;gap:8px}.scene-tab{padding:14px 16px;border-radius:11px;color:var(--muted);cursor:pointer}.scene-tab.active,.scene-tab:hover{background:var(--sage);color:var(--ink);font-weight:700}.scene-panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:34px;min-height:220px}.scene-panel h3{color:var(--ink);font-size:24px;margin-bottom:10px}.scene-panel p{color:var(--muted);max-width:620px}.scene-panel ul{margin:20px 0 0 19px;color:#4f5b56}
.channels{background:#f0eee7}.channel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}.channel{background:#fff;padding:21px;border:1px solid var(--line);border-radius:16px}.channel h3{font-size:17px;color:var(--ink);margin:12px 0 5px}.channel p{font-size:13px;color:var(--muted)}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 35px}.faq{border-top:1px solid var(--line);padding:17px 0}.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:15px;color:var(--ink);font-weight:700}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";font-size:20px;color:#849d27}.faq[open] summary:after{content:"−"}.faq p{color:var(--muted);font-size:14px;padding:12px 30px 0 0}
.support{padding-top:30px}.support-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:34px;display:grid;grid-template-columns:1fr 1fr;gap:50px}.support-card h2{color:var(--ink);font-size:29px}.support-card p{color:var(--muted);margin:10px 0 23px}.support-meta{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:#53635a}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.field{display:flex;flex-direction:column;gap:5px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:700;color:var(--ink)}.field input,.field textarea,.field select{border:1px solid var(--line);border-radius:10px;background:#fbfcf9;padding:12px 13px;outline:none}.field textarea{min-height:88px;resize:vertical}.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--ink);box-shadow:0 0 0 3px rgba(184,216,74,.25)}.form-note{font-size:12px;color:#7a8580;margin-top:10px}
.footer{background:#0d2c27;color:#b5c9bd;padding:62px 0 24px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}.footer h3{color:#fff;font-size:17px;margin-bottom:15px}.footer p,.footer a{font-size:13px;color:#a9beb2}.footer a{display:block;margin:7px 0}.footer a:hover{color:var(--lime)}.footer-brand{font-size:19px;color:#fff;font-weight:800}.footer-brand span{color:var(--lime)}.copyright{border-top:1px solid rgba(255,255,255,.13);margin-top:43px;padding-top:19px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#829b8e}
@media(max-width:1024px){.nav-links a{padding:8px 6px;font-size:13px}.hero-grid{gap:35px}.feature-grid{gap:35px}.download{padding:45px 35px}.security-grid{grid-template-columns:1fr 1fr}.security-card.large{grid-column:1/-1}.channel-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.container{width:min(100% - 32px,var(--max))}.topbar .container{height:31px}.topbar span:last-child{display:none}.nav{height:68px}.nav-links{display:none;position:absolute;top:68px;left:16px;right:16px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav-links.open{display:flex}.nav-links a{padding:12px}.nav .btn-primary{display:none}.menu{display:block;margin-left:auto}.section{padding:62px 0}.section-head{display:block;margin-bottom:25px}.section-head h2{font-size:28px;margin-bottom:10px}.hero{padding:58px 0 45px}.hero-grid{grid-template-columns:1fr;gap:40px}.hero h1{font-size:43px}.hero:after{right:-220px;top:280px}.device-stage{min-height:350px}.status-grid{grid-template-columns:1fr 1fr}.status-item{padding:13px 15px;border-bottom:1px solid rgba(255,255,255,.14)}.status-item:nth-child(2){border-right:0}.feature-grid,.download-grid,.info-layout,.scenes,.support-card{grid-template-columns:1fr}.feature-list{grid-template-columns:1fr 1fr}.download-visual{display:none}.timeline{grid-template-columns:1fr 1fr;gap:20px}.time-node{border:0;margin:0;padding-right:5px}.steps-grid,.guide-grid{grid-template-columns:1fr 1fr}.notice{grid-template-columns:75px 1fr}.notice a{display:none}.faq-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}}
@media(max-width:520px){.logo{font-size:14px}.logo small{font-size:8px}.hero h1{font-size:36px}.hero-copy{font-size:15px}.hero-actions .btn{width:100%}.trust-row{gap:12px}.trust-row small{font-size:11px}.device-stage{padding:20px}.qr-card{right:12px;bottom:20px;width:145px}.version{left:14px;top:18px}.feature-list,.steps-grid,.guide-grid,.channel-grid,.security-grid{grid-template-columns:1fr}.security-card.large{grid-column:auto}.download{padding:35px 22px;border-radius:20px}.download h2{font-size:28px}.download-meta{display:block;line-height:2}.timeline{grid-template-columns:1fr}.news-item{grid-template-columns:65px 1fr 16px}.news-item p{display:none}.notice{grid-template-columns:1fr;padding:17px}.notice time{font-size:16px}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.support-card{padding:25px 20px}.footer-grid{grid-template-columns:1fr}.footer{padding-top:45px}}

/* roulang page: article */
:root{
      --ink:#123b34;--ink-2:#1d4b42;--lime:#b8d84a;--sage:#dde7df;
      --paper:#f7f5ef;--white:#fff;--text:#1d2421;--muted:#68716d;
      --line:#dfe3dd;--radius:20px;--shadow:0 16px 42px rgba(18,59,52,.09);
      --ease:220ms ease;--max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none;transition:color var(--ease),background var(--ease),transform var(--ease),border-color var(--ease),box-shadow var(--ease)}
    a:hover{color:var(--ink-2)}
    img{display:block;max-width:100%;height:auto}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer;border:0}
    :focus-visible{outline:3px solid rgba(184,216,74,.75);outline-offset:3px}
    .container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
    .topbar{background:#0d2c27;color:#cddbd1;font-size:12px}
    .topbar .container{height:34px;display:flex;align-items:center;justify-content:space-between}
    .topbar span+span{margin-left:25px}
    .header{position:sticky;top:0;z-index:20;background:rgba(247,245,239,.94);border-bottom:1px solid rgba(223,227,221,.86);backdrop-filter:blur(12px)}
    .nav{height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;white-space:nowrap;letter-spacing:-.04em}
    .logo-mark{width:34px;height:34px;border-radius:11px;background:var(--ink);position:relative;flex:0 0 auto}
    .logo-mark:before,.logo-mark:after{content:"";position:absolute;background:var(--lime);border-radius:4px}
    .logo-mark:before{width:15px;height:5px;left:9px;top:10px;transform:rotate(45deg)}
    .logo-mark:after{width:15px;height:5px;left:9px;top:19px;transform:rotate(-45deg)}
    .logo small{display:block;font-size:9px;letter-spacing:.12em;color:#789087;line-height:1.1;margin-top:2px}
    .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
    .nav-links a{padding:9px 11px;font-size:14px;color:#4f5b56;border-radius:9px}
    .nav-links a:hover,.nav-links a.active{color:var(--ink);background:var(--sage)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:12px 19px;border-radius:11px;font-size:14px;font-weight:700;border:1px solid transparent;transition:all var(--ease)}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:#1e594e;color:#fff;box-shadow:0 8px 20px rgba(18,59,52,.18);transform:translateY(-2px)}
    .btn-lime{background:var(--lime);color:var(--ink)}
    .btn-lime:hover{background:#c8e55c;color:var(--ink);transform:translateY(-2px);box-shadow:0 8px 20px rgba(184,216,74,.2)}
    .btn-outline{border-color:#b8c5bb;color:var(--ink);background:transparent}
    .btn-outline:hover{border-color:var(--ink);background:#fff}
    .menu{display:none;background:var(--sage);color:var(--ink);padding:9px;border-radius:9px}
    .page-head{padding:58px 0 46px;background:var(--sage);border-bottom:1px solid #d1ddd3}
    .breadcrumbs{display:flex;flex-wrap:wrap;gap:9px;align-items:center;color:#71817a;font-size:13px;margin-bottom:23px}
    .breadcrumbs a{text-decoration:underline;text-decoration-color:#a5b6aa;text-underline-offset:4px}
    .breadcrumbs .current{color:var(--ink);font-weight:700;max-width:550px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#718b7c;font-weight:800}
    .page-head h1{max-width:900px;margin:12px 0 17px;color:var(--ink);font-size:clamp(34px,5vw,58px);line-height:1.18;letter-spacing:-.055em}
    .meta-row{display:flex;flex-wrap:wrap;gap:10px 20px;color:#68766f;font-size:14px}
    .meta-row span{display:inline-flex;align-items:center;gap:7px}
    .meta-row span+span:before{content:"";width:4px;height:4px;background:#9aaba0;border-radius:50%;margin-right:5px}
    .badge{display:inline-flex;align-items:center;width:max-content;padding:4px 10px;border-radius:999px;background:#e7eedf;color:#45634f;font-size:12px;font-weight:700}
    .article-layout{display:grid;grid-template-columns:minmax(0,820px) 270px;gap:70px;align-items:start;padding:72px 0 82px}
    .article-intro{border-left:4px solid var(--lime);background:#fff;padding:22px 26px;border-radius:0 16px 16px 0;color:#53645d;font-size:17px;margin-bottom:38px;box-shadow:0 8px 24px rgba(18,59,52,.04)}
    .article-body{font-size:17px;line-height:1.9;color:#303a35}
    .article-body h2{color:var(--ink);font-size:30px;line-height:1.35;margin:46px 0 16px;letter-spacing:-.035em}
    .article-body h3{color:var(--ink);font-size:22px;line-height:1.4;margin:32px 0 12px}
    .article-body p{margin:0 0 22px}
    .article-body ul,.article-body ol{padding-left:1.5em;margin:0 0 24px}
    .article-body li{margin:8px 0}
    .article-body blockquote{margin:28px 0;padding:20px 24px;background:var(--sage);border-radius:14px;color:#416056}
    .article-body img{width:100%;border-radius:16px;margin:28px 0 8px}
    .article-body figure{margin:30px 0}
    .article-body figcaption{color:var(--muted);font-size:13px;text-align:center}
    .article-body table{width:100%;border-collapse:collapse;margin:28px 0;background:#fff;border-radius:12px;overflow:hidden}
    .article-body th,.article-body td{padding:13px 15px;border:1px solid var(--line);text-align:left}
    .article-body th{background:#edf2ec;color:var(--ink);font-weight:700}
    .article-body a{color:#557b37;text-decoration:underline;text-underline-offset:3px}
    .article-side{position:sticky;top:118px}
    .side-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 8px 25px rgba(18,59,52,.04)}
    .side-card+.side-card{margin-top:15px}
    .side-card h3{font-size:16px;color:var(--ink);margin:0 0 14px}
    .side-list{list-style:none;padding:0;margin:0}
    .side-list li{padding:10px 0;border-bottom:1px solid var(--line);font-size:14px;color:#52615a}
    .side-list li:last-child{border-bottom:0;padding-bottom:0}
    .side-list a:hover{color:#6f8e27}
    .reading-note{display:flex;gap:12px;align-items:flex-start;color:#63736b;font-size:13px}
    .note-icon{width:30px;height:30px;border-radius:10px;background:var(--sage);color:var(--ink);display:grid;place-items:center;font-weight:800;flex:0 0 auto}
    .operation-section{padding:0 0 84px}
    .operation-card{display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;background:var(--ink);border-radius:22px;padding:31px 36px;color:#fff;position:relative;overflow:hidden}
    .operation-card:after{content:"";position:absolute;width:220px;height:220px;border:1px solid rgba(184,216,74,.22);border-radius:50%;right:140px;top:-130px}
    .operation-card h2{font-size:25px;margin:0 0 8px;position:relative;z-index:1}
    .operation-card p{margin:0;color:#b9cdc1;font-size:14px;position:relative;z-index:1}
    .operation-card .btn{position:relative;z-index:1;white-space:nowrap}
    .related-section{padding:0 0 88px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}
    .section-head h2{font-size:31px;line-height:1.25;color:var(--ink);letter-spacing:-.04em;margin:0}
    .section-head p{max-width:470px;color:var(--muted);font-size:14px;margin:0}
    .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .related-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;min-height:190px;display:flex;flex-direction:column;transition:all var(--ease)}
    .related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b8cbbd}
    .related-card h3{font-size:18px;line-height:1.45;color:var(--ink);margin:13px 0 8px}
    .related-card p{font-size:13px;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .related-foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:17px;color:#7b8a82;font-size:12px}
    .related-foot strong{color:#6e8e2a;font-size:15px}
    .support-section{padding:0 0 92px}
    .support-box{background:#eef3ec;border:1px solid #d5e0d5;border-radius:22px;padding:30px;display:flex;justify-content:space-between;align-items:center;gap:25px}
    .support-box h2{font-size:24px;color:var(--ink);margin:0 0 6px}
    .support-box p{margin:0;color:var(--muted);font-size:14px}
    .support-actions{display:flex;gap:10px;flex-wrap:wrap}
    .footer{background:var(--ink);color:#b9cdc1;padding:57px 0 23px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
    .footer-brand{font-size:20px;font-weight:800;color:#fff;letter-spacing:-.04em}
    .footer-brand span{font-size:10px;letter-spacing:.14em;color:var(--lime);margin-left:7px}
    .footer p{font-size:13px;color:#a9beb3;margin:0}
    .footer h3{font-size:14px;color:#fff;margin:0 0 13px}
    .footer a{display:block;width:max-content;color:#b9cdc1;font-size:13px;margin:7px 0}
    .footer a:hover{color:var(--lime);text-decoration:underline;text-underline-offset:3px}
    .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(213,231,219,.16);margin-top:40px;padding-top:19px;color:#8da69a;font-size:11px}
    .empty-article{padding:45px 28px;background:#fff;border:1px solid var(--line);border-radius:18px;color:var(--muted);text-align:center}
    @media(max-width:1024px){
      .nav{gap:16px}.nav-links a{padding:8px 7px;font-size:13px}
      .article-layout{grid-template-columns:minmax(0,1fr) 230px;gap:38px}
      .footer-grid{gap:24px}
    }
    @media(max-width:768px){
      .container{width:min(var(--max),calc(100% - 32px))}
      .topbar .container{height:32px}.topbar span+span{display:none}
      .nav{height:70px}.nav-links{display:none;position:absolute;top:70px;left:0;right:0;background:var(--paper);padding:12px 16px 17px;border-bottom:1px solid var(--line);box-shadow:0 12px 28px rgba(18,59,52,.1);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}.nav-links a{padding:12px 14px}
      .nav>.btn-primary{display:none}.menu{display:block;margin-left:auto}
      .page-head{padding:42px 0 34px}.page-head h1{font-size:36px}
      .article-layout{display:block;padding:48px 0 60px}.article-side{position:static;margin-top:38px}
      .article-body{font-size:16px}.article-body h2{font-size:26px}
      .operation-section,.related-section,.support-section{padding-bottom:60px}
      .operation-card{grid-template-columns:1fr;padding:26px}.operation-card .btn{width:max-content}
      .related-grid{grid-template-columns:1fr 1fr}
      .support-box{display:block}.support-actions{margin-top:20px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
      .copyright{display:block}.copyright span{display:block;margin-top:5px}
    }
    @media(max-width:520px){
      .logo small{font-size:8px}.logo{font-size:15px}
      .breadcrumbs .current{max-width:210px}
      .article-intro{font-size:15px;padding:18px 19px}
      .related-grid{grid-template-columns:1fr}
      .support-actions .btn{width:100%}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 18px}
      .footer-grid>div:first-child{grid-column:1/-1}
    }

/* roulang page: category1 */
:root{
      --ink:#123b34;
      --ink-2:#1d4b42;
      --lime:#b8d84a;
      --sage:#dde7df;
      --paper:#f7f5ef;
      --white:#fff;
      --text:#1d2421;
      --muted:#68716d;
      --line:#dfe3dd;
      --soft:#eef3ed;
      --radius:20px;
      --shadow:0 16px 42px rgba(18,59,52,.09);
      --max:1200px;
      --ease:220ms ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none;transition:color var(--ease),background var(--ease),transform var(--ease),border-color var(--ease),box-shadow var(--ease)}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
    .topbar{background:#0d2c27;color:#cddbd1;font-size:12px}
    .topbar .container{height:34px;display:flex;justify-content:space-between;align-items:center}
    .topbar span+span{margin-left:25px}
    .header{position:sticky;top:0;z-index:20;background:rgba(247,245,239,.94);border-bottom:1px solid rgba(223,227,221,.85);backdrop-filter:blur(12px)}
    .nav{height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;white-space:nowrap;letter-spacing:-.04em}
    .logo-mark{width:34px;height:34px;border-radius:11px;background:var(--ink);position:relative;flex:none}
    .logo-mark:before,.logo-mark:after{content:"";position:absolute;background:var(--lime);border-radius:4px}
    .logo-mark:before{width:15px;height:5px;left:9px;top:10px;transform:rotate(45deg)}
    .logo-mark:after{width:15px;height:5px;left:9px;top:19px;transform:rotate(-45deg)}
    .logo small{display:block;font-size:9px;letter-spacing:.12em;color:#789087;line-height:1.1;margin-top:2px}
    .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
    .nav-links a{padding:9px 11px;font-size:14px;color:#4f5b56;border-radius:9px}
    .nav-links a:hover,.nav-links a.active{color:var(--ink);background:var(--sage)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:12px 19px;border-radius:11px;font-size:14px;font-weight:700;border:1px solid transparent;transition:all var(--ease)}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:#1e594e;box-shadow:0 8px 20px rgba(18,59,52,.18);transform:translateY(-2px)}
    .btn-outline{border-color:#b8c5bb;color:var(--ink);background:transparent}
    .btn-outline:hover{border-color:var(--ink);background:#fff}
    .menu{display:none;background:var(--sage);color:var(--ink);padding:9px;border-radius:9px}
    .eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#79907f;font-weight:700}
    .section{padding:84px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:32px}
    .section-head h2{font-size:34px;line-height:1.25;letter-spacing:-.03em;color:var(--ink);margin:8px 0 0}
    .section-head p{max-width:540px;color:var(--muted);font-size:15px;margin:0}
    .page-head{padding:58px 0 48px;background:var(--paper);border-bottom:1px solid var(--line)}
    .crumbs{display:flex;align-items:center;gap:9px;color:#87938d;font-size:13px;margin-bottom:26px}
    .crumbs a:hover{color:var(--ink)}
    .crumbs .current{color:var(--ink);font-weight:700}
    .page-head-grid{display:flex;justify-content:space-between;align-items:end;gap:40px}
    .page-head h1{font-size:clamp(38px,5vw,56px);line-height:1.12;letter-spacing:-.06em;color:var(--ink);margin:12px 0 16px}
    .page-head-copy{max-width:670px;color:var(--muted);font-size:17px;margin:0}
    .update-note{min-width:190px;border-left:3px solid var(--lime);padding:10px 0 10px 18px;color:var(--muted);font-size:13px}
    .update-note strong{display:block;color:var(--ink);font-size:15px;margin-top:4px}
    .filter-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:18px 20px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 8px 24px rgba(18,59,52,.04)}
    .filter-label{font-size:13px;font-weight:700;color:var(--ink);margin-right:5px}
    .filter{padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--muted);font-size:13px}
    .filter:hover,.filter.active{background:var(--sage);border-color:#b9cdbd;color:var(--ink)}
    .badge{display:inline-flex;width:max-content;padding:4px 9px;border-radius:999px;background:var(--sage);color:var(--ink);font-size:12px;font-weight:700;line-height:1.4}
    .badge.lime{background:var(--lime)}
    .badge.gray{background:#edf0ec;color:#68716d}
    .pinned{padding:34px;background:var(--ink);color:#fff;border-radius:24px;display:grid;grid-template-columns:132px 1fr 150px;align-items:center;gap:28px;box-shadow:var(--shadow)}
    .date-block{border-right:1px solid rgba(255,255,255,.2);padding-right:26px}
    .date-block small{display:block;color:#aec1b6;font-size:12px}
    .date-block strong{display:block;color:var(--lime);font-family:ui-monospace,monospace;font-size:34px;line-height:1.15;margin-top:3px}
    .pinned h2{font-size:25px;line-height:1.35;margin:12px 0 8px}
    .pinned p{color:#c1d0c8;font-size:14px;margin:0;max-width:690px}
    .pinned .btn{justify-self:end}
    .timeline{position:relative;margin-top:16px;padding-left:26px}
    .timeline:before{content:"";position:absolute;left:6px;top:8px;bottom:8px;width:1px;background:#c8d4ca}
    .notice-item{position:relative;display:grid;grid-template-columns:120px 1fr auto;gap:26px;align-items:start;padding:24px 0 24px 18px;border-bottom:1px solid var(--line)}
    .notice-item:before{content:"";position:absolute;left:-25px;top:32px;width:13px;height:13px;border:3px solid var(--paper);background:var(--lime);border-radius:50%;box-shadow:0 0 0 1px #a9c16c}
    .notice-date{font-family:ui-monospace,monospace;color:#718078;font-size:13px;padding-top:3px}
    .notice-content h3{font-size:19px;color:var(--ink);margin:8px 0 5px;line-height:1.4}
    .notice-content p{font-size:14px;color:var(--muted);margin:0;max-width:650px}
    .text-link{font-size:13px;font-weight:700;color:#6f8d18;white-space:nowrap;margin-top:25px}
    .text-link:hover{color:var(--ink);transform:translateX(3px)}
    .notice-tip{display:flex;align-items:center;gap:15px;padding:16px 20px;background:var(--soft);border:1px solid #d3dfd5;border-radius:14px;color:#53645b;font-size:14px}
    .notice-tip .tip-icon{width:30px;height:30px;border-radius:50%;background:var(--ink);color:var(--lime);display:grid;place-items:center;font-weight:800;flex:none}
    .archive-section{background:#e9f0e9}
    .archive-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .archive-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;transition:all var(--ease)}
    .archive-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b9cdbd}
    .archive-card h3{color:var(--ink);font-size:20px;margin:0 0 14px}
    .archive-card ul{list-style:none;margin:0;padding:0}
    .archive-card li{display:flex;justify-content:space-between;gap:15px;padding:9px 0;border-bottom:1px solid #edf0eb;color:var(--muted);font-size:13px}
    .archive-card li:last-child{border-bottom:0}
    .archive-card li span:last-child{font-family:ui-monospace,monospace;color:#87938d;font-size:12px}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 24px}
    .faq-item{background:#fff;border:1px solid var(--line);border-radius:15px;overflow:hidden}
    .faq-item summary{list-style:none;cursor:pointer;padding:18px 20px;color:var(--ink);font-weight:700;display:flex;justify-content:space-between;gap:20px}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"+";font-size:22px;font-weight:400;color:#829087;line-height:1}
    .faq-item[open] summary{background:#f0f5ef}
    .faq-item[open] summary:after{content:"−";color:var(--ink)}
    .faq-answer{padding:0 20px 18px;color:var(--muted);font-size:14px}
    .bottom-cta{padding:30px 34px;background:var(--sage);border-radius:22px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .bottom-cta h2{font-size:24px;color:var(--ink);margin:0 0 5px}
    .bottom-cta p{color:var(--muted);font-size:14px;margin:0}
    .footer{background:var(--ink);color:#b7c8be;padding:62px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:38px}
    .footer-brand{font-size:20px;color:#fff;font-weight:800}
    .footer-brand span{font-size:10px;color:var(--lime);letter-spacing:.12em;margin-left:7px}
    .footer p{font-size:13px;line-height:1.7;color:#9eb3a8}
    .footer h3{font-size:14px;color:#fff;margin:0 0 15px}
    .footer a{display:block;color:#a9bdb2;font-size:13px;margin:8px 0}
    .footer a:hover{color:var(--lime);text-decoration:underline;text-underline-offset:4px}
    .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.13);margin-top:45px;padding-top:20px;color:#82988d;font-size:12px}
    :focus-visible{outline:3px solid rgba(184,216,74,.8);outline-offset:3px}
    @media(max-width:1024px){
      .nav{gap:16px}
      .nav-links a{padding:8px 7px;font-size:13px}
      .pinned{grid-template-columns:110px 1fr}
      .pinned .btn{grid-column:2;justify-self:start}
    }
    @media(max-width:768px){
      .container{width:min(var(--max),calc(100% - 34px))}
      .topbar .container{height:32px}
      .topbar span:last-child{display:none}
      .nav{height:70px}
      .nav-links{display:none;position:absolute;left:17px;right:17px;top:78px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 14px}
      .nav>.btn{display:none}
      .menu{display:block;margin-left:auto}
      .page-head{padding:43px 0 38px}
      .page-head-grid{display:block}
      .page-head h1{font-size:42px}
      .update-note{margin-top:28px}
      .section{padding:60px 0}
      .section-head{display:block}
      .section-head p{margin-top:13px}
      .pinned{grid-template-columns:1fr;padding:27px}
      .date-block{border-right:0;border-bottom:1px solid rgba(255,255,255,.2);padding:0 0 16px}
      .pinned .btn{grid-column:auto;justify-self:start}
      .notice-item{grid-template-columns:1fr;gap:5px;padding-left:10px}
      .notice-item:before{left:-24px}
      .text-link{margin-top:8px}
      .archive-grid,.faq-grid{grid-template-columns:1fr}
      .bottom-cta{display:block;padding:26px}
      .bottom-cta .btn{margin-top:18px;width:100%}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .footer-grid>div:first-child{grid-column:1/-1}
      .copyright{display:block}
      .copyright span{display:block;margin-top:7px}
    }
    @media(max-width:520px){
      .logo{font-size:14px}
      .logo small{font-size:7px}
      .logo-mark{width:30px;height:30px;border-radius:9px}
      .logo-mark:before{left:8px;top:9px}
      .logo-mark:after{left:8px;top:17px}
      .page-head h1{font-size:35px}
      .filter-bar{padding:15px}
      .filter-label{width:100%}
      .notice-tip{align-items:flex-start}
      .footer-grid{grid-template-columns:1fr}
      .footer-grid>div:first-child{grid-column:auto}
    }

/* roulang page: category4 */
:root{
      --ink:#123b34;--ink-2:#1d4b42;--lime:#b8d84a;--sage:#dde7df;
      --paper:#f7f5ef;--white:#fff;--text:#1d2421;--muted:#68716d;
      --line:#dfe3dd;--radius:20px;--shadow:0 16px 42px rgba(18,59,52,.09);
      --max:1200px;--ease:220ms ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none;transition:color var(--ease),background var(--ease),transform var(--ease),border-color var(--ease),box-shadow var(--ease)}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(var(--max),calc(100% - 48px));margin:auto}
    .topbar{background:#0d2c27;color:#cddbd1;font-size:12px}
    .topbar .container{height:34px;display:flex;justify-content:space-between;align-items:center}
    .topbar span+span{margin-left:25px}
    .header{position:sticky;top:0;z-index:20;background:rgba(247,245,239,.95);border-bottom:1px solid rgba(223,227,221,.85);backdrop-filter:blur(12px)}
    .nav{height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;white-space:nowrap;letter-spacing:-.04em}
    .logo-mark{width:34px;height:34px;border-radius:11px;background:var(--ink);position:relative;flex:none}
    .logo-mark:before,.logo-mark:after{content:"";position:absolute;background:var(--lime);border-radius:4px;width:15px;height:5px;left:9px}
    .logo-mark:before{top:10px;transform:rotate(45deg)}
    .logo-mark:after{top:19px;transform:rotate(-45deg)}
    .logo small{display:block;font-size:9px;letter-spacing:.12em;color:#789087;line-height:1.1;margin-top:2px}
    .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
    .nav-links a{padding:9px 11px;font-size:14px;color:#4f5b56;border-radius:9px}
    .nav-links a:hover,.nav-links a.active{color:var(--ink);background:var(--sage)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:12px 19px;border-radius:11px;font-size:14px;font-weight:700;border:1px solid transparent;transition:all var(--ease)}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:#1e594e;box-shadow:0 8px 20px rgba(18,59,52,.18);transform:translateY(-2px)}
    .btn-lime{background:var(--lime);color:var(--ink)}
    .btn-lime:hover{background:#c8e55c;transform:translateY(-2px);box-shadow:0 8px 20px rgba(184,216,74,.2)}
    .btn-outline{border-color:#b8c5bb;color:var(--ink);background:transparent}
    .btn-outline:hover{border-color:var(--ink);background:#fff}
    .menu{display:none;background:var(--sage);color:var(--ink);padding:9px;border-radius:9px}
    .page-head{padding:68px 0 52px;border-bottom:1px solid var(--line);background:linear-gradient(120deg,#f7f5ef 58%,#e9f0e9)}
    .crumbs{font-size:13px;color:var(--muted);margin-bottom:28px}
    .crumbs a:hover{color:var(--ink)}
    .crumbs b{padding:0 8px;color:#a2afa7}
    .head-row{display:flex;align-items:end;justify-content:space-between;gap:30px}
    .eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#79907f;font-weight:700}
    h1{font-size:clamp(38px,5vw,58px);line-height:1.12;letter-spacing:-.06em;color:var(--ink);margin:12px 0 18px}
    .head-copy{max-width:650px;color:var(--muted);font-size:17px;margin:0}
    .progress-note{border:1px solid #c9d6ca;background:rgba(255,255,255,.58);border-radius:16px;padding:18px 22px;min-width:205px}
    .progress-note small{display:block;color:var(--muted);font-size:12px}
    .progress-note strong{display:block;color:var(--ink);font-size:20px;margin-top:2px}
    .section{padding:82px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}
    .section-head h2{font-size:32px;line-height:1.25;letter-spacing:-.04em;color:var(--ink);margin:0}
    .section-head p{max-width:540px;color:var(--muted);font-size:15px;margin:0}
    .route{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);background:#fff;border-radius:22px;overflow:hidden}
    .route-step{position:relative;padding:28px 25px 30px;border-right:1px solid var(--line)}
    .route-step:last-child{border-right:0}
    .route-step:after{content:"→";position:absolute;right:-12px;top:35px;width:24px;height:24px;border-radius:50%;background:var(--lime);color:var(--ink);text-align:center;line-height:23px;font-weight:800;z-index:2}
    .route-step:last-child:after{display:none}
    .num{font-family:ui-monospace,monospace;font-size:13px;color:#78931e;font-weight:700}
    .route-step h3{font-size:19px;color:var(--ink);margin:18px 0 6px}
    .route-step p{color:var(--muted);font-size:14px;margin:0}
    .guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
    .guide-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;min-height:225px;display:flex;flex-direction:column;transition:all var(--ease)}
    .guide-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b8cbbd}
    .guide-icon{width:42px;height:42px;border-radius:13px;background:var(--sage);display:grid;place-items:center;color:var(--ink);font-weight:800;font-size:18px}
    .tag{display:inline-flex;width:max-content;padding:4px 9px;border-radius:999px;background:#edf3df;color:#55711e;font-size:12px;font-weight:700;margin-top:18px}
    .guide-card h3{font-size:19px;line-height:1.35;color:var(--ink);margin:10px 0 7px}
    .guide-card p{font-size:14px;color:var(--muted);margin:0}
    .read-link{display:inline-flex;align-items:center;gap:7px;color:#6c891b;font-size:13px;font-weight:700;margin-top:auto;padding-top:17px}
    .read-link:hover{color:var(--ink);transform:translateX(3px)}
    .check-section{background:var(--sage)}
    .check-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:58px;align-items:start}
    .check-intro h2{font-size:34px;line-height:1.25;color:var(--ink);margin:10px 0 15px}
    .check-intro p{color:var(--muted);margin:0}
    .check-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .check-item{background:rgba(255,255,255,.7);border:1px solid rgba(183,201,187,.8);border-radius:15px;padding:17px 18px;display:flex;gap:12px;align-items:flex-start}
    .check-item i{display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--ink);color:var(--lime);font-style:normal;font-size:12px;flex:none;margin-top:3px}
    .check-item strong{display:block;color:var(--ink);font-size:15px}
    .check-item span{display:block;color:var(--muted);font-size:13px;margin-top:2px}
    .example{display:grid;grid-template-columns:390px 1fr;gap:65px;align-items:center}
    .screen-demo{height:300px;background:#e6eee6;border:1px solid #cedbd0;border-radius:25px;padding:20px;position:relative;overflow:hidden}
    .screen-demo:before{content:"";display:block;width:90px;height:5px;border-radius:5px;background:#aabeb0;margin:0 auto 22px}
    .demo-panel{background:#fff;border-radius:15px;padding:18px;box-shadow:0 8px 22px rgba(18,59,52,.07)}
    .demo-panel small{color:#79907f}
    .demo-panel h3{font-size:22px;color:var(--ink);margin:7px 0 16px}
    .demo-line{height:11px;border-radius:6px;background:#e4ebe4;margin:10px 0;width:88%}
    .demo-line.short{width:58%}
    .step-copy{display:grid;gap:18px}
    .step-line{display:flex;gap:17px}
    .step-line b{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;background:var(--ink);color:var(--lime);font-size:14px;flex:none}
    .step-line h3{font-size:18px;color:var(--ink);margin:0 0 3px}
    .step-line p{font-size:14px;color:var(--muted);margin:0}
    .faq-section{background:#fff}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px 22px}
    .faq-item{border:1px solid var(--line);border-radius:14px;background:#fbfcf9;overflow:hidden}
    .faq-item summary{list-style:none;cursor:pointer;padding:18px 20px;color:var(--ink);font-weight:700;display:flex;justify-content:space-between;gap:15px}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"+";font-size:22px;font-weight:400;line-height:1;color:#76931b}
    .faq-item[open] summary{background:#f0f5ed}
    .faq-item[open] summary:after{content:"−"}
    .faq-answer{padding:0 20px 18px;color:var(--muted);font-size:14px}
    .security-card{background:var(--ink);color:#fff;border-radius:23px;padding:34px 38px;display:flex;align-items:center;justify-content:space-between;gap:30px}
    .security-card h2{font-size:28px;margin:7px 0 8px}
    .security-card p{color:#bfd0c5;margin:0;max-width:680px}
    .security-mark{font-size:52px;color:var(--lime);line-height:1}
    .footer{background:var(--ink);color:#b8ccc0;padding:62px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}
    .footer-brand{font-size:21px;font-weight:800;color:#fff}
    .footer-brand span{display:block;color:var(--lime);font-size:11px;letter-spacing:.13em;margin-top:3px}
    .footer p{font-size:13px;color:#9db5a8}
    .footer h3{font-size:14px;color:#fff;margin:0 0 14px}
    .footer a{display:block;font-size:13px;color:#a9c0b3;margin:8px 0}
    .footer a:hover{color:var(--lime);text-decoration:underline}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:42px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#8fa99c}
    :focus-visible{outline:3px solid rgba(184,216,74,.75);outline-offset:3px}
    @media(max-width:1024px){
      .nav{gap:15px}.nav-links a{padding:8px 7px;font-size:13px}
      .head-row,.check-layout{grid-template-columns:1fr;display:grid}.progress-note{width:max-content}
      .example{grid-template-columns:330px 1fr;gap:35px}
    }
    @media(max-width:768px){
      .container{width:min(var(--max),calc(100% - 32px))}
      .topbar .container{height:32px}.topbar span+span{display:none}
      .nav{height:70px}.nav-links{display:none;position:absolute;top:70px;left:16px;right:16px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}.nav-links a{padding:11px 13px}.nav>.btn{display:none}.menu{display:block;margin-left:auto}
      .page-head{padding:45px 0 38px}.head-row{display:block}.progress-note{margin-top:25px}
      .section{padding:62px 0}.section-head{display:block}.section-head p{margin-top:10px}
      .route{grid-template-columns:1fr 1fr}.route-step{border-bottom:1px solid var(--line)}.route-step:nth-child(2){border-right:0}.route-step:nth-child(3){border-bottom:0}.route-step:nth-child(4){border-right:0;border-bottom:0}.route-step:after{display:none}
      .guide-grid{grid-template-columns:1fr 1fr}.check-list,.faq-grid{grid-template-columns:1fr}
      .example{grid-template-columns:1fr}.screen-demo{max-width:390px}
      .security-card{display:block;padding:28px}.security-mark{margin-bottom:15px}
      .footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:7px}
    }
    @media(max-width:520px){
      h1{font-size:38px}.guide-grid,.route{grid-template-columns:1fr}
      .route-step{border-right:0!important;border-bottom:1px solid var(--line)!important}.route-step:last-child{border-bottom:0!important}
      .logo small{font-size:8px}.logo{font-size:15px}
      .footer-grid{grid-template-columns:1fr;gap:24px}
      .security-card h2{font-size:24px}
    }

/* roulang page: category3 */
:root{
      --ink:#123b34;--ink-2:#1d4b42;--lime:#b8d84a;--sage:#dde7df;
      --paper:#f7f5ef;--white:#fff;--text:#1d2421;--muted:#68716d;
      --line:#dfe3dd;--soft:#eef3ed;--radius:20px;--radius-sm:12px;
      --shadow:0 16px 42px rgba(18,59,52,.09);--max:1200px;--ease:220ms ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none;transition:color var(--ease),background var(--ease),transform var(--ease),border-color var(--ease),box-shadow var(--ease)}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer;border:0}
    button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(184,216,74,.7);outline-offset:3px}
    .container{width:min(var(--max),calc(100% - 48px));margin:auto}
    .topbar{background:#0d2c27;color:#cddbd1;font-size:12px}
    .topbar .container{height:34px;display:flex;align-items:center;justify-content:space-between}
    .topbar span+span{margin-left:25px}
    .header{position:sticky;top:0;z-index:30;background:rgba(247,245,239,.94);border-bottom:1px solid rgba(223,227,221,.85);backdrop-filter:blur(12px)}
    .nav{height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;white-space:nowrap;letter-spacing:-.04em}
    .logo-mark{width:34px;height:34px;border-radius:11px;background:var(--ink);position:relative;flex:none}
    .logo-mark:before,.logo-mark:after{content:"";position:absolute;background:var(--lime);border-radius:4px}
    .logo-mark:before{width:15px;height:5px;left:9px;top:10px;transform:rotate(45deg)}
    .logo-mark:after{width:15px;height:5px;left:9px;top:19px;transform:rotate(-45deg)}
    .logo small{display:block;font-size:9px;letter-spacing:.12em;color:#789087;line-height:1.1;margin-top:2px}
    .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
    .nav-links a{padding:9px 11px;font-size:14px;color:#4f5b56;border-radius:9px}
    .nav-links a:hover,.nav-links a.active{color:var(--ink);background:var(--sage)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 19px;border:1px solid transparent;border-radius:11px;font-size:14px;font-weight:700;line-height:1.3;transition:all var(--ease)}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:#1e594e;color:#fff;transform:translateY(-2px);box-shadow:0 8px 20px rgba(18,59,52,.18)}
    .btn-lime{background:var(--lime);color:var(--ink)}
    .btn-lime:hover{background:#c8e55c;color:var(--ink);transform:translateY(-2px);box-shadow:0 8px 20px rgba(184,216,74,.2)}
    .btn-outline{background:transparent;color:var(--ink);border-color:#b8c5bb}
    .btn-outline:hover{background:#fff;color:var(--ink);border-color:var(--ink)}
    .menu{display:none;background:var(--sage);color:var(--ink);padding:9px 11px;border-radius:9px;font-size:18px}
    .section{padding:88px 0}
    .section-soft{background:var(--soft)}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:32px}
    .section-head h2{margin:0;color:var(--ink);font-size:34px;letter-spacing:-.04em;line-height:1.25}
    .section-head p{max-width:520px;margin:0;color:var(--muted);font-size:15px}
    .eyebrow{margin:0 0 9px;color:#6f8c7d;font-size:12px;font-weight:800;letter-spacing:.13em;text-transform:uppercase}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:99px;background:#eef4d7;color:#587111;font-size:12px;font-weight:700;line-height:1.2}
    .badge-muted{background:var(--sage);color:#496158}
    .page-head{position:relative;padding:62px 0 55px;overflow:hidden;border-bottom:1px solid var(--line);background:linear-gradient(115deg,#f7f5ef 0%,#edf2eb 100%)}
    .page-head:after{content:"";position:absolute;right:-110px;top:-175px;width:430px;height:430px;border:1px solid #cbd9ce;border-radius:50%;box-shadow:0 0 0 38px rgba(221,231,223,.55),0 0 0 78px rgba(221,231,223,.25)}
    .page-head-inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr auto;gap:30px;align-items:end}
    .breadcrumb{display:flex;align-items:center;gap:9px;margin-bottom:19px;color:var(--muted);font-size:13px}
    .breadcrumb i{width:5px;height:5px;border-top:1px solid var(--muted);border-right:1px solid var(--muted);transform:rotate(45deg)}
    .breadcrumb a:hover{color:var(--ink)}
    .page-head h1{margin:0;color:var(--ink);font-size:clamp(38px,5vw,55px);letter-spacing:-.06em;line-height:1.12}
    .page-head p{max-width:640px;margin:17px 0 0;color:var(--muted);font-size:16px}
    .update-box{min-width:200px;padding:17px 19px;border:1px solid #d2ddd4;border-radius:15px;background:rgba(255,255,255,.72)}
    .update-box small{display:block;color:var(--muted);font-size:12px}
    .update-box strong{display:block;margin-top:3px;color:var(--ink);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:15px}
    .download-panel{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;padding:35px;border-radius:26px;background:var(--ink);color:#e9f0eb;box-shadow:var(--shadow);overflow:hidden;position:relative}
    .download-panel:after{content:"";position:absolute;right:-90px;bottom:-130px;width:360px;height:360px;border:1px solid rgba(184,216,74,.24);border-radius:50%;box-shadow:0 0 0 32px rgba(184,216,74,.06)}
    .download-intro,.platform-grid{position:relative;z-index:1}
    .download-intro h2{margin:10px 0 11px;color:#fff;font-size:31px;line-height:1.25;letter-spacing:-.04em}
    .download-intro p{margin:0;max-width:470px;color:#bdd0c5;font-size:15px}
    .version-line{display:flex;gap:21px;flex-wrap:wrap;margin-top:25px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);color:#b8ccc1;font-size:13px}
    .version-line b{display:block;color:var(--lime);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:16px}
    .platform-grid{display:grid;gap:12px}
    .platform-card{display:grid;grid-template-columns:47px 1fr auto;gap:14px;align-items:center;padding:16px;border:1px solid rgba(255,255,255,.14);border-radius:16px;background:rgba(255,255,255,.07)}
    .platform-card:hover{border-color:rgba(184,216,74,.65);background:rgba(255,255,255,.11)}
    .platform-icon{width:45px;height:45px;display:grid;place-items:center;border-radius:13px;background:var(--lime);color:var(--ink);font-size:18px;font-weight:800}
    .platform-card h3{margin:0;color:#fff;font-size:16px}
    .platform-card p{margin:2px 0 0;color:#b9ccc1;font-size:12px}
    .platform-card .btn{padding:9px 12px;font-size:12px}
    .preview-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:20px}
    .preview-card{min-height:300px;padding:22px;border:1px solid var(--line);border-radius:22px;background:var(--white);overflow:hidden;position:relative;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
    .preview-card:hover{transform:translateY(-4px);border-color:#b8cbbd;box-shadow:var(--shadow)}
    .preview-card.dark{background:#234b41;color:#fff;border-color:#234b41}
    .preview-card h3{margin:12px 0 6px;color:var(--ink);font-size:19px}
    .preview-card.dark h3{color:#fff}
    .preview-card p{margin:0;color:var(--muted);font-size:14px}
    .preview-card.dark p{color:#bed1c6}
    .phone-frame{position:absolute;right:25px;bottom:-45px;width:185px;height:230px;padding:12px;border:7px solid #173b33;border-radius:28px;background:#f4f7f1;box-shadow:0 14px 28px rgba(14,48,41,.18)}
    .phone-frame:before{content:"";display:block;width:58px;height:8px;margin:0 auto 12px;border-radius:20px;background:#173b33}
    .mini-head{height:25px;border-radius:8px;background:#cbdccc}
    .mini-hero{height:62px;margin-top:10px;border-radius:10px;background:#315c51}
    .mini-row{height:12px;margin-top:9px;border-radius:5px;background:#dbe6de}
    .mini-row.short{width:62%}
    .screen-lines{margin-top:29px}
    .screen-lines span{display:block;height:10px;margin:10px 0;border-radius:5px;background:#dce7de}
    .screen-lines span:nth-child(2){width:82%}
    .screen-lines span:nth-child(3){width:61%}
    .dark .screen-lines span{background:#4c6e64}
    .steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;position:relative}
    .step-card{min-height:195px;padding:24px;border:1px solid var(--line);border-radius:18px;background:var(--white);position:relative}
    .step-number{display:flex;align-items:center;justify-content:center;width:42px;height:42px;margin-bottom:27px;border-radius:50%;background:var(--sage);color:var(--ink);font-size:15px;font-weight:800}
    .step-card h3{margin:0 0 7px;color:var(--ink);font-size:18px}
    .step-card p{margin:0;color:var(--muted);font-size:14px}
    .version-list{display:grid;gap:12px}
    .version-card{display:grid;grid-template-columns:190px 1fr auto;gap:26px;align-items:center;padding:23px 25px;border:1px solid var(--line);border-radius:18px;background:var(--white);transition:all var(--ease)}
    .version-card:hover{transform:translateY(-3px);border-color:#b8cbbd;box-shadow:var(--shadow)}
    .version-meta strong{display:block;color:var(--ink);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:20px}
    .version-meta small{display:block;margin-top:3px;color:var(--muted);font-size:12px}
    .version-info h3{margin:0 0 5px;color:var(--ink);font-size:17px}
    .version-info p{margin:0;color:var(--muted);font-size:14px}
    .text-link{display:inline-flex;align-items:center;gap:6px;color:#6f8c19;font-size:13px;font-weight:800}
    .text-link:hover{color:var(--ink);transform:translateX(3px)}
    .compat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .compat-card{padding:25px;border-radius:18px;background:var(--white);border:1px solid var(--line)}
    .compat-card .compat-icon{width:42px;height:42px;display:grid;place-items:center;margin-bottom:19px;border-radius:12px;background:var(--sage);color:var(--ink);font-size:18px}
    .compat-card h3{margin:0 0 13px;color:var(--ink);font-size:19px}
    .compat-card ul{padding:0;margin:0;list-style:none}
    .compat-card li{padding:9px 0;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
    .compat-card li:first-child{border-top:0;padding-top:0}
    .safety-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:22px}
    .safety-lead{padding:34px;border-radius:24px;background:var(--sage)}
    .safety-symbol{width:56px;height:56px;display:grid;place-items:center;border-radius:17px;background:var(--ink);color:var(--lime);font-size:26px}
    .safety-lead h2{margin:23px 0 10px;color:var(--ink);font-size:31px;line-height:1.25;letter-spacing:-.04em}
    .safety-lead p{margin:0;color:#51655b;font-size:15px}
    .safety-list{display:grid;grid-template-columns:1fr 1fr;gap:13px}
    .safe-item{padding:22px;border:1px solid var(--line);border-radius:18px;background:var(--white)}
    .safe-item b{display:block;margin-bottom:7px;color:var(--ink);font-size:16px}
    .safe-item p{margin:0;color:var(--muted);font-size:13px}
    .support-box{display:grid;grid-template-columns:1fr .95fr;gap:50px;padding:38px;border-radius:25px;background:var(--white);border:1px solid var(--line)}
    .support-box h2{margin:8px 0 11px;color:var(--ink);font-size:31px;line-height:1.25;letter-spacing:-.04em}
    .support-box p{max-width:500px;margin:0;color:var(--muted)}
    .support-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:25px}
    .support-note{padding:22px;border-radius:18px;background:var(--soft)}
    .support-note strong{display:block;color:var(--ink);font-size:16px}
    .support-note p{margin:7px 0 0;color:var(--muted);font-size:14px}
    .footer{padding:66px 0 24px;background:#0d2c27;color:#b9cdc1}
    .footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:42px}
    .footer-brand{color:#fff;font-size:21px;font-weight:800;letter-spacing:-.04em}
    .footer-brand span{display:block;margin-top:2px;color:var(--lime);font-size:10px;letter-spacing:.15em}
    .footer h3{margin:0 0 15px;color:#fff;font-size:14px}
    .footer a{display:block;width:max-content;max-width:100%;margin:8px 0;color:#b9cdc1;font-size:14px}
    .footer a:hover{color:var(--lime);text-decoration:underline;text-underline-offset:4px}
    .footer p{margin:0;color:#a8beb2;font-size:13px}
    .copyright{display:flex;justify-content:space-between;gap:25px;margin-top:47px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);color:#87a196;font-size:12px}
    @media(max-width:1024px){
      .nav{gap:17px}.nav-links a{padding:8px 7px;font-size:13px}
      .download-panel,.support-box{gap:25px}.preview-grid{grid-template-columns:1fr 1fr}.preview-card:first-child{grid-column:span 2}
      .steps-grid{grid-template-columns:1fr 1fr}.compat-grid{grid-template-columns:1fr 1fr}.footer-grid{gap:27px}
    }
    @media(max-width:768px){
      .container{width:min(var(--max),calc(100% - 32px))}
      .topbar .container span:last-child{display:none}.nav{height:70px;gap:14px}.logo{font-size:15px}.logo small{font-size:8px}
      .menu{display:block;margin-left:auto}.nav>.btn{display:none}
      .nav-links{display:none;position:absolute;top:70px;left:16px;right:16px;margin:0;padding:10px;border:1px solid var(--line);border-radius:15px;background:#fff;box-shadow:var(--shadow)}
      .nav-links.open{display:grid}.nav-links a{padding:11px 12px}
      .page-head{padding:46px 0}.page-head-inner,.download-panel,.safety-wrap,.support-box{grid-template-columns:1fr}
      .update-box{width:max-content}.section{padding:63px 0}.section-head{display:block;margin-bottom:25px}.section-head p{margin-top:11px}
      .platform-card{grid-template-columns:45px 1fr}.platform-card .btn{grid-column:2;width:max-content}
      .version-card{grid-template-columns:1fr;gap:12px}.version-card .text-link{width:max-content}
      .footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin:6px 0}
    }
    @media(max-width:520px){
      body{font-size:15px}.container{width:calc(100% - 28px)}.topbar{display:none}
      .page-head{padding:40px 0}.page-head h1{font-size:35px}.page-head p{font-size:15px}.update-box{min-width:0;width:100%}
      .download-panel{padding:23px;border-radius:21px}.download-intro h2,.safety-lead h2,.support-box h2{font-size:27px}
      .platform-card{padding:14px;gap:11px}.preview-grid,.compat-grid,.safety-list,.footer-grid{grid-template-columns:1fr}.preview-card:first-child{grid-column:auto}
      .preview-card{min-height:240px}.steps-grid{grid-template-columns:1fr}.step-card{min-height:auto}.section{padding:52px 0}
      .support-box{padding:25px}.safety-lead{padding:27px}.footer{padding-top:50px}
    }

/* roulang page: category2 */
:root{
      --ink:#123b34;--ink-2:#1d4b42;--lime:#b8d84a;--sage:#dde7df;
      --paper:#f7f5ef;--white:#fff;--text:#1d2421;--muted:#68716d;
      --line:#dfe3dd;--soft:#eef3ed;--radius:20px;
      --shadow:0 16px 42px rgba(18,59,52,.09);--max:1200px;--ease:220ms ease
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none;transition:color var(--ease),background var(--ease),transform var(--ease),border-color var(--ease),box-shadow var(--ease)}
    a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(184,216,74,.7);outline-offset:3px}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(var(--max),calc(100% - 48px));margin:auto}
    .topbar{background:#0d2c27;color:#cddbd1;font-size:12px}
    .topbar .container{height:34px;display:flex;justify-content:space-between;align-items:center}
    .topbar span+span{margin-left:25px}
    .header{position:sticky;top:0;z-index:20;background:rgba(247,245,239,.95);border-bottom:1px solid rgba(223,227,221,.85);backdrop-filter:blur(12px)}
    .nav{height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;white-space:nowrap;letter-spacing:-.04em}
    .logo-mark{width:34px;height:34px;border-radius:11px;background:var(--ink);position:relative;display:block}
    .logo-mark:before,.logo-mark:after{content:"";position:absolute;background:var(--lime);border-radius:4px}
    .logo-mark:before{width:15px;height:5px;left:9px;top:10px;transform:rotate(45deg)}
    .logo-mark:after{width:15px;height:5px;left:9px;top:19px;transform:rotate(-45deg)}
    .logo small{display:block;font-size:9px;letter-spacing:.12em;color:#789087;line-height:1.1;margin-top:2px}
    .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
    .nav-links a{padding:9px 11px;font-size:14px;color:#4f5b56;border-radius:9px}
    .nav-links a:hover,.nav-links a.active{color:var(--ink);background:var(--sage)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:12px 19px;border-radius:11px;font-size:14px;font-weight:700;border:1px solid transparent;transition:all var(--ease)}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:#1e594e;box-shadow:0 8px 20px rgba(18,59,52,.18);transform:translateY(-2px)}
    .btn-outline{border-color:#b8c5bb;color:var(--ink);background:transparent}
    .btn-outline:hover{border-color:var(--ink);background:#fff}
    .menu{display:none;background:var(--sage);color:var(--ink);padding:9px;border-radius:9px}
    .page-head{padding:62px 0 54px;border-bottom:1px solid var(--line);background:var(--paper)}
    .crumbs{font-size:13px;color:var(--muted);margin-bottom:22px}
    .crumbs a:hover{color:var(--ink)}
    .crumbs b{margin:0 9px;color:#9aa79d}
    .page-head-grid{display:grid;grid-template-columns:1fr 370px;gap:60px;align-items:end}
    .eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#79907f;font-weight:700}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(38px,5vw,58px);line-height:1.12;letter-spacing:-.06em;color:var(--ink);margin:13px 0 18px}
    .lead{max-width:680px;color:var(--muted);font-size:17px;margin-bottom:0}
    .head-meta{border-left:3px solid var(--lime);padding:16px 0 16px 22px;color:var(--muted);font-size:14px}
    .head-meta strong{display:block;color:var(--ink);font-size:25px;font-family:ui-monospace,monospace;margin-bottom:4px}
    .section{padding:82px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}
    .section-head h2{font-size:32px;line-height:1.25;letter-spacing:-.04em;color:var(--ink);margin:0}
    .section-head p{max-width:520px;color:var(--muted);font-size:15px;margin:0}
    .feature-article{display:grid;grid-template-columns:1.08fr 1fr;min-height:330px;background:var(--ink);border-radius:24px;overflow:hidden;box-shadow:var(--shadow)}
    .feature-cover{position:relative;min-height:300px;background:linear-gradient(135deg,#315d50 0%,#193f37 60%,#102f2a 100%);display:flex;align-items:center;justify-content:center}
    .feature-cover:before{content:"";width:250px;height:250px;border:1px solid rgba(184,216,74,.45);border-radius:50%;box-shadow:0 0 0 28px rgba(184,216,74,.08),0 0 0 65px rgba(184,216,74,.05)}
    .cover-label{position:absolute;left:28px;top:25px;color:var(--lime);font-size:12px;letter-spacing:.1em;font-weight:700}
    .cover-date{position:absolute;right:28px;bottom:24px;color:#c4d5cc;font-size:13px}
    .feature-body{padding:42px 44px;color:#d7e2db;display:flex;flex-direction:column;justify-content:center}
    .badge{display:inline-flex;align-items:center;width:max-content;padding:5px 10px;border-radius:999px;background:var(--sage);color:var(--ink);font-size:12px;font-weight:700}
    .badge.dark{background:rgba(184,216,74,.16);color:var(--lime)}
    .feature-body h2{font-size:29px;line-height:1.35;color:#fff;margin:19px 0 13px;letter-spacing:-.035em}
    .feature-body p{color:#b8cbc0;font-size:15px;margin-bottom:24px}
    .article-link{color:#76931b;font-size:13px;font-weight:800;display:inline-flex;align-items:center;gap:8px}
    .article-link:hover{color:var(--ink)}
    .feature-body .article-link{color:var(--lime)}
    .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .news-card{background:var(--white);border:1px solid var(--line);border-radius:18px;overflow:hidden;display:flex;flex-direction:column;min-height:320px;transition:all var(--ease)}
    .news-card:hover{transform:translateY(-4px);border-color:#b8cbbd;box-shadow:var(--shadow)}
    .news-cover{height:142px;background:var(--soft);position:relative;overflow:hidden}
    .news-cover:after{content:"";position:absolute;width:140px;height:140px;border:1px solid #c8d7cb;border-radius:50%;right:-22px;top:24px;box-shadow:0 0 0 20px rgba(200,215,203,.35)}
    .news-cover span{position:absolute;left:19px;top:18px;color:var(--ink);font-weight:800;font-size:25px;z-index:1}
    .news-content{padding:21px 21px 18px;display:flex;flex-direction:column;flex:1}
    .news-content h3{font-size:19px;line-height:1.4;color:var(--ink);margin:14px 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .news-content p{color:var(--muted);font-size:14px;line-height:1.65;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
    .news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;color:#8a958f;font-size:12px;border-top:1px solid var(--line);padding-top:13px}
    .popular{background:var(--sage)}
    .popular-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .popular-item{background:rgba(255,255,255,.7);border:1px solid rgba(18,59,52,.1);border-radius:16px;padding:20px 22px;display:flex;align-items:center;gap:18px}
    .popular-item:hover{background:#fff;box-shadow:var(--shadow);transform:translateY(-3px)}
    .number{font-size:30px;line-height:1;color:#8ca423;font-family:ui-monospace,monospace;font-weight:800}
    .popular-item h3{font-size:16px;color:var(--ink);margin:0 0 3px}
    .popular-item small{color:var(--muted);font-size:12px}
    .tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .topic-tag{padding:10px 16px;border:1px solid #c9d5cb;border-radius:999px;color:var(--ink);font-size:14px;background:#fff}
    .topic-tag:hover{border-color:var(--ink);background:var(--ink);color:#fff}
    .notice-box{display:flex;align-items:center;gap:22px;border:1px solid var(--line);border-radius:16px;background:#fff;padding:23px 26px}
    .notice-icon{width:42px;height:42px;border-radius:13px;background:var(--ink);color:var(--lime);display:grid;place-items:center;font-weight:800;flex:none}
    .notice-box p{margin:0;color:var(--muted);font-size:14px}
    .notice-box strong{color:var(--ink);margin-right:9px}
    .subscribe{background:#e9f0e9}
    .subscribe-box{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center;border-radius:22px}
    .subscribe h2{color:var(--ink);font-size:30px;line-height:1.3;margin-bottom:12px}
    .subscribe p{color:var(--muted);font-size:15px;margin-bottom:0}
    .form-line{display:flex;gap:9px}
    .form-line input{height:50px;min-width:0;flex:1;border:1px solid #c3d0c5;border-radius:10px;background:#fff;padding:0 15px;color:var(--text)}
    .form-line input:focus{border-color:var(--ink);box-shadow:0 0 0 4px rgba(184,216,74,.2);outline:0}
    .check{display:block;color:var(--muted);font-size:12px;margin-top:11px}
    .check input{accent-color:var(--ink);margin-right:7px}
    .bottom-row{padding:30px 0 88px;text-align:center}
    .bottom-row p{color:var(--muted);margin-bottom:17px}
    .footer{background:var(--ink);color:#b8cbc0;padding:62px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
    .footer-brand{font-size:20px;font-weight:800;color:#fff;letter-spacing:-.03em}
    .footer-brand span{display:block;color:var(--lime);font-size:11px;letter-spacing:.12em;margin-top:3px}
    .footer p{font-size:13px;color:#9fb5a8}
    .footer h3{font-size:14px;color:#fff;margin:0 0 15px}
    .footer a{display:block;color:#aec2b7;font-size:13px;margin:9px 0}
    .footer a:hover{color:var(--lime);text-decoration:underline}
    .copyright{border-top:1px solid rgba(255,255,255,.13);margin-top:42px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#8fa99b;font-size:12px}
    @media(max-width:1024px){
      .nav{gap:16px}.nav-links a{padding:8px 7px;font-size:13px}
      .page-head-grid{gap:30px}.feature-article{grid-template-columns:1fr 1fr}
      .news-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{width:min(var(--max),calc(100% - 32px))}
      .topbar .container{height:32px}.topbar span:last-child{display:none}
      .nav{height:68px}.nav-links{display:none;position:absolute;left:16px;right:16px;top:76px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}.nav-links a{padding:11px 13px}.nav>.btn{display:none}.menu{display:block;margin-left:auto}
      .page-head{padding:45px 0 40px}.page-head-grid{grid-template-columns:1fr;gap:23px}
      .section{padding:60px 0}.section-head{display:block}.section-head p{margin-top:10px}
      .feature-article{grid-template-columns:1fr}.feature-cover{min-height:190px}.feature-body{padding:30px 26px}
      .news-grid,.popular-grid,.subscribe-box{grid-template-columns:1fr}
      .popular-grid{gap:12px}.subscribe-box{gap:25px}.form-line{flex-direction:column}.form-line .btn{width:100%}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px}.copyright{display:block}.copyright span{display:block;margin-top:7px}
    }
    @media(max-width:520px){
      h1{font-size:38px}.lead{font-size:15px}.news-grid{grid-template-columns:1fr}
      .news-cover{height:130px}.notice-box{align-items:flex-start;padding:19px;gap:14px}
      .footer-grid{grid-template-columns:1fr}.footer{padding-top:45px}
    }