/* roulang page: index */
:root{
  --ink:#17251f;
  --ink-2:#294039;
  --cream:#f7f5ef;
  --paper:#fffdf8;
  --mist:#eceee8;
  --line:#dfe4dc;
  --muted:#68766e;
  --orange:#e9783f;
  --orange-dark:#c85d2b;
  --amber:#f2b45c;
  --green:#537b62;
  --success:#2f8760;
  --radius:10px;
  --radius-lg:20px;
  --shadow:0 12px 35px rgba(23,37,31,.09);
  --container:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--cream);line-height:1.7;font-size:15px}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input{font:inherit}
button{cursor:pointer;border:0}
.container{width:min(var(--container),calc(100% - 48px));margin:auto}
.site-header{height:78px;background:rgba(255,253,248,.94);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
.nav-wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:flex;align-items:center;gap:12px;min-width:220px}
.brand-mark{width:39px;height:39px;border-radius:11px;background:var(--orange);color:#fff;display:grid;place-items:center;font-weight:800;font-size:19px;box-shadow:4px 4px 0 var(--amber)}
.brand strong{display:block;font-size:17px;letter-spacing:.02em}
.brand small{display:block;color:var(--muted);font-size:11px;line-height:1.25;margin-top:2px}
.main-nav{display:flex;align-items:center;gap:4px}
.main-nav a{padding:9px 12px;border-radius:7px;color:#4f5e56;font-size:14px;transition:.2s ease}
.main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--ink);background:#eef1eb}
.main-nav a.active{box-shadow:inset 0 -2px var(--orange)}
.nav-action{background:var(--ink)!important;color:#fff!important;padding:11px 17px!important;border-radius:7px!important}
.nav-action:hover{background:var(--orange)!important}
.menu-toggle{display:none;background:var(--ink);color:#fff;border-radius:7px;padding:8px 11px}
.hero{min-height:590px;background:var(--ink);color:#fff;position:relative;overflow:hidden;display:flex;align-items:center}
.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(23,37,31,.96) 0%,rgba(23,37,31,.78) 48%,rgba(23,37,31,.18) 100%);pointer-events:none}
.hero-art{position:absolute;right:0;top:0;width:55%;height:100%;background:
linear-gradient(135deg,transparent 40%,rgba(242,180,92,.3) 40.2%,rgba(242,180,92,.08) 67%,transparent 67.2%),
radial-gradient(circle at 64% 45%,#7c9b7f 0 5%,transparent 5.4%),
linear-gradient(145deg,#263f34,#718b70 48%,#d97a42)}
.hero-art:before{content:"问鼎\nH5";white-space:pre;position:absolute;right:19%;top:22%;width:185px;height:315px;border:8px solid #f6f3e9;border-radius:27px;background:linear-gradient(#263e34 0 22%,#f7f5ef 22%);color:var(--orange);font-size:42px;font-weight:800;line-height:1.05;padding:92px 22px 0;box-shadow:18px 20px 0 rgba(23,37,31,.3),0 25px 50px rgba(0,0,0,.25);transform:rotate(7deg)}
.hero-inner{position:relative;z-index:1;padding:92px 0 100px;width:58%}
.eyebrow,.section-label{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--amber);font-weight:700}
.hero h1{font-size:clamp(36px,5vw,67px);line-height:1.14;letter-spacing:-.04em;margin:20px 0 22px;max-width:700px}
.hero p{font-size:18px;line-height:1.8;color:#d8e2d9;max-width:610px}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 19px;border-radius:7px;font-weight:700;transition:.2s ease;border:1px solid transparent}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--amber);transform:translateY(-2px)}
.btn-outline{border-color:#cbd6cb;color:var(--ink);background:transparent}
.btn-outline:hover{border-color:var(--orange);color:var(--orange)}
.btn:focus,.main-nav a:focus,summary:focus{outline:3px solid rgba(242,180,92,.55);outline-offset:3px}
.section{padding:92px 0}
.section.soft{background:#eef0e9}
.section.dark{background:var(--ink);color:#fff}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:34px}
.section-head h2{font-size:clamp(27px,3vw,42px);line-height:1.2;letter-spacing:-.03em;margin-top:8px}
.section-head p{color:var(--muted);max-width:530px}
.dark .section-head p{color:#bbcac0}
.quick-bar{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line)}
.quick-item{background:var(--paper);padding:27px 30px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.quick-item:hover{background:#fff7ed}
.quick-item b{font-size:18px}.quick-item span{display:block;color:var(--muted);font-size:13px}
.arrow{font-size:22px;color:var(--orange)}
.download-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:55px;align-items:center}
.device-panel{min-height:365px;border-radius:var(--radius-lg);background:#dfe8dc;position:relative;overflow:hidden;padding:35px}
.device-panel:before{content:"问鼎娱乐";display:block;color:#fff;font-size:51px;font-weight:800;line-height:1;background:var(--green);width:255px;height:235px;padding:34px 25px;border-radius:16px;transform:rotate(-7deg);box-shadow:25px 24px 0 rgba(23,37,31,.13)}
.device-panel:after{content:"APP";position:absolute;right:36px;bottom:34px;color:var(--orange);font-size:78px;font-weight:900;letter-spacing:-.08em}
.feature-list{display:grid;gap:18px;margin-top:25px}
.feature-list li{list-style:none;border-bottom:1px solid var(--line);padding:0 0 16px 34px;position:relative}
.feature-list li:before{content:"✓";position:absolute;left:0;top:1px;width:22px;height:22px;background:var(--orange);color:#fff;border-radius:50%;font-size:13px;text-align:center;line-height:22px}
.feature-list strong{display:block}.feature-list span{display:block;color:var(--muted);font-size:13px}
.meta-row{display:flex;flex-wrap:wrap;gap:8px;margin:23px 0;color:var(--muted);font-size:13px}
.tag{display:inline-block;padding:4px 9px;border-radius:5px;background:#f4e6d8;color:#a7552e;font-size:12px;font-weight:700}
.h5-strip{background:#f2e9dc;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.h5-view{height:285px;background:var(--ink);border-radius:16px 16px 5px 5px;position:relative;overflow:hidden;padding:30px;color:#fff}
.h5-view:before{content:"WEN DINHG YU LE";font-size:13px;letter-spacing:.16em;color:var(--amber)}
.h5-view:after{content:"随时打开问鼎H5";position:absolute;bottom:35px;left:30px;font-size:30px;font-weight:800}
.news-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:45px}
.feature-news{background:var(--ink);color:#fff;padding:35px;min-height:260px;border-radius:var(--radius-lg);display:flex;flex-direction:column;justify-content:end}
.feature-news p{color:#c3d0c7;margin-top:13px}.feature-news .tag{align-self:flex-start;margin-bottom:auto}
.news-list{display:grid;gap:0}
.news-row{padding:17px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:78px 1fr;gap:16px}
.news-row time{color:var(--orange);font-weight:700;font-size:13px}.news-row h3{font-size:16px;line-height:1.4}.news-row p{color:var(--muted);font-size:13px;margin-top:5px}
.dynamic-list{border-top:2px solid var(--ink)}
.dynamic-item{display:grid;grid-template-columns:100px 115px 1fr auto;gap:18px;align-items:center;padding:20px 12px;border-bottom:1px solid var(--line);transition:.2s}
.dynamic-item:hover{background:#fffaf2;padding-left:18px}
.dynamic-item time{color:var(--muted);font-size:13px}.dynamic-item h3{font-size:16px}.dynamic-item p{color:var(--muted);font-size:13px}.read-link{color:var(--orange);font-weight:700;font-size:13px;white-space:nowrap}
.empty-state{padding:36px;text-align:center;color:var(--muted);background:#fffaf2;border:1px dashed #cbd5ca}
.columns{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.info-card{background:var(--paper);padding:28px;border:1px solid var(--line);border-radius:var(--radius);transition:.2s}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#c5d3c5}
.icon{width:39px;height:39px;border-radius:8px;background:#f5dfc8;color:var(--orange-dark);display:grid;place-items:center;font-weight:800;margin-bottom:18px}
.info-card h3{font-size:19px;margin-bottom:8px}.info-card p{color:var(--muted);font-size:14px}
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.scene{border-left:3px solid var(--orange);padding:18px 17px;background:#fffaf2}
.scene b{display:block;margin-bottom:5px}.scene span{font-size:13px;color:var(--muted)}
.experience{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:center}
.screen-stack{height:310px;position:relative}.screen{position:absolute;width:155px;height:275px;border:7px solid var(--ink);border-radius:22px;background:#f6f1e7;padding:35px 13px 15px;color:var(--orange);font-weight:800;font-size:21px}.screen.one{left:12%;top:15px;transform:rotate(-10deg)}.screen.two{left:39%;top:0;transform:rotate(3deg);background:var(--green);color:#fff}.screen.three{left:66%;top:28px;transform:rotate(12deg);background:var(--orange);color:#fff}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.step{border-top:2px solid var(--orange);padding-top:15px}.step em{font-style:normal;color:var(--orange);font-weight:800}.step h3{font-size:16px;margin:8px 0 5px}.step p{font-size:13px;color:var(--muted)}
.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}.timeline article{padding:20px 0;border-top:1px solid #718279}.timeline time{color:var(--amber);font-size:13px}.timeline h3{margin:8px 0}.timeline p{color:#bdcbc1;font-size:14px}
.help-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:55px}.help-list{display:grid;gap:10px}.help-list a{padding:14px 17px;border:1px solid var(--line);background:var(--paper);border-radius:7px}.help-list a:hover{border-color:var(--orange);color:var(--orange)}
.faq{max-width:850px}.faq details{border-bottom:1px solid var(--line);padding:19px 0}.faq summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";color:var(--orange);font-size:22px}.faq details[open] summary:after{content:"−"}.faq p{color:var(--muted);padding:12px 35px 0 0}
.cta-band{background:var(--orange);color:#fff;padding:58px 0}.cta-band .container{display:flex;justify-content:space-between;align-items:center;gap:25px}.cta-band h2{font-size:32px;line-height:1.25}.cta-band p{color:#fff1e7;margin-top:6px}
.site-footer{background:#101a16;color:#d8e2d9;padding:58px 0 24px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:50px;padding-bottom:42px;border-bottom:1px solid #35433b}.site-footer h3{color:#fff;margin-bottom:13px}.site-footer p,.site-footer a{color:#9eafa3;font-size:14px}.site-footer a{display:block;margin:7px 0}.site-footer a:hover{color:var(--amber)}.footer-brand{font-size:22px;color:#fff!important;font-weight:800}.copyright{display:flex;justify-content:space-between;gap:18px;padding-top:22px;color:#819187;font-size:12px}
@media(max-width:1024px){.main-nav{gap:0}.main-nav a{padding:8px 7px;font-size:13px}.hero-inner{width:65%}.hero-art{width:48%}.hero-art:before{right:12%}.steps{grid-template-columns:repeat(3,1fr);row-gap:28px}}
@media(max-width:768px){.container{width:min(100% - 32px,var(--container))}.site-header{height:68px}.brand{min-width:0}.brand strong{font-size:15px}.brand small{font-size:10px}.menu-toggle{display:block}.main-nav{display:none;position:absolute;top:68px;left:0;right:0;padding:12px 16px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:var(--shadow);align-items:stretch;flex-direction:column}.main-nav.open{display:flex}.main-nav a{padding:13px 12px}.nav-action{margin-top:5px;text-align:center}.hero{min-height:610px}.hero-art{width:100%;height:47%;top:auto;bottom:0;opacity:.62}.hero-art:before{right:18%;top:8%;width:130px;height:220px;font-size:29px;padding:65px 16px 0;border-width:6px}.hero:after{background:linear-gradient(180deg,rgba(23,37,31,.94) 0%,rgba(23,37,31,.74) 54%,rgba(23,37,31,.2) 100%)}.hero-inner{width:100%;padding:65px 0 230px}.hero h1{font-size:38px}.hero p{font-size:16px}.section{padding:65px 0}.section-head{display:block}.section-head p{margin-top:13px}.quick-bar,.download-layout,.h5-strip,.news-layout,.experience,.help-layout{grid-template-columns:1fr;gap:28px}.quick-item{padding:21px}.columns,.scene-grid,.timeline{grid-template-columns:1fr 1fr}.dynamic-item{grid-template-columns:80px 1fr}.dynamic-item .tag{display:none}.dynamic-item .read-link{grid-column:2}.steps{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-grid>div:first-child{grid-column:1/-1}.cta-band .container{display:block}.cta-band .actions{margin-top:20px}}
@media(max-width:520px){.brand-mark{width:34px;height:34px}.brand strong{font-size:13px}.brand small{display:none}.hero h1{font-size:33px}.hero-inner{padding-top:52px}.columns,.scene-grid,.steps,.timeline{grid-template-columns:1fr}.device-panel{min-height:280px;padding:25px}.device-panel:before{width:200px;height:185px;font-size:38px}.device-panel:after{font-size:55px}.dynamic-item{grid-template-columns:1fr}.dynamic-item .read-link{grid-column:auto}.screen-stack{transform:scale(.82);transform-origin:left center}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.copyright{display:block}.copyright span{display:block;margin-top:8px}}

/* roulang page: category1 */
:root{
      --ink:#17251f;
      --ink-2:#294039;
      --cream:#f7f5ef;
      --paper:#fffdf8;
      --mist:#eceee8;
      --line:#dfe4dc;
      --muted:#68766e;
      --orange:#e9783f;
      --orange-dark:#c85d2b;
      --amber:#f2b45c;
      --green:#537b62;
      --success:#2f8760;
      --radius:10px;
      --radius-lg:20px;
      --shadow:0 12px 35px rgba(23,37,31,.09);
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--cream);line-height:1.7;font-size:15px}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{height:78px;background:rgba(255,253,248,.94);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .nav-wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:flex;align-items:center;gap:12px;min-width:220px}
    .brand-mark{width:39px;height:39px;border-radius:11px;background:var(--orange);color:#fff;display:grid;place-items:center;font-weight:800;font-size:19px;box-shadow:4px 4px 0 var(--amber)}
    .brand strong{display:block;font-size:17px;letter-spacing:.02em}
    .brand small{display:block;color:var(--muted);font-size:11px;line-height:1.25;margin-top:2px}
    .main-nav{display:flex;align-items:center;gap:4px}
    .main-nav a{padding:9px 12px;border-radius:7px;color:#4f5e56;font-size:14px;transition:.2s ease}
    .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--ink);background:#eef1eb}
    .main-nav a.active{box-shadow:inset 0 -2px var(--orange)}
    .nav-action{background:var(--ink)!important;color:#fff!important;padding:11px 17px!important;border-radius:7px!important}
    .nav-action:hover{background:var(--orange)!important}
    .menu-toggle{display:none;background:var(--ink);color:#fff;border-radius:7px;padding:8px 11px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 19px;border-radius:7px;font-weight:700;transition:.2s ease;border:1px solid transparent}
    .btn-primary{background:var(--orange);color:#fff}
    .btn-primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-2px)}
    .btn-light{background:#fff;color:var(--ink)}
    .btn-light:hover{background:var(--amber);transform:translateY(-2px)}
    .btn-outline{border-color:#cbd6cb;color:var(--ink);background:transparent}
    .btn-outline:hover{border-color:var(--orange);color:var(--orange)}
    .btn:focus,.main-nav a:focus,summary:focus,.topic-link:focus{outline:3px solid rgba(242,180,92,.55);outline-offset:3px}
    .section{padding:86px 0}
    .section.soft{background:#eef0e9}
    .section.dark{background:var(--ink);color:#fff}
    .section-label{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--orange);font-weight:800}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:34px}
    .section-head h2{font-size:clamp(27px,3vw,42px);line-height:1.2;letter-spacing:0;margin:8px 0 0}
    .section-head p{color:var(--muted);max-width:520px;margin:0}
    .page-intro{padding:52px 0 48px;background:var(--paper);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
    .page-intro:after{content:"";position:absolute;width:230px;height:230px;right:7%;top:-100px;background:var(--amber);opacity:.38;clip-path:polygon(50% 0,100% 34%,82% 100%,19% 92%,0 32%)}
    .breadcrumb{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:24px;position:relative;z-index:1}
    .breadcrumb span{color:var(--orange)}
    .intro-grid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:45px;align-items:end;position:relative;z-index:1}
    .intro-grid h1{font-size:clamp(37px,5vw,60px);line-height:1.14;letter-spacing:0;margin:10px 0 17px}
    .intro-grid p{max-width:720px;color:var(--muted);font-size:16px;margin:0}
    .intro-stamp{border-left:4px solid var(--orange);padding:13px 0 13px 20px;color:var(--ink-2);font-weight:700;align-self:center}
    .intro-stamp small{display:block;color:var(--muted);font-weight:400;margin-top:4px}
    .topic-bar{padding:23px 0;background:var(--ink)}
    .topic-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
    .topic-label{color:#d8e2d9;font-weight:700;margin-right:8px}
    .topic-link{border:1px solid rgba(255,255,255,.25);color:#eef4ee;padding:7px 12px;border-radius:5px;font-size:13px;transition:.2s ease}
    .topic-link:hover{background:var(--orange);border-color:var(--orange);color:#fff}
    .news-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:30px}
    .feature-panel{position:relative;min-height:390px;overflow:hidden;border-radius:var(--radius-lg);padding:42px;background:var(--ink);color:#fff;display:flex;flex-direction:column;justify-content:flex-end}
    .feature-panel:before{content:"资讯";position:absolute;right:20px;top:15px;font-weight:900;font-size:88px;line-height:1;color:rgba(242,180,92,.16)}
    .feature-panel:after{content:"";position:absolute;width:210px;height:210px;right:-48px;bottom:-40px;border:38px solid var(--orange);opacity:.76;transform:rotate(28deg)}
    .feature-panel>*{position:relative;z-index:1}
    .tag{display:inline-block;padding:4px 9px;border-radius:5px;background:#f4e6d8;color:#a7552e;font-size:12px;font-weight:700}
    .feature-panel .tag{align-self:flex-start;background:rgba(242,180,92,.22);color:#ffe0a8;margin-bottom:auto}
    .feature-panel h2{font-size:32px;line-height:1.32;margin:18px 0 12px;max-width:510px}
    .feature-panel p{color:#cfdbd1;max-width:500px;margin:0}
    .feature-panel .feature-meta{display:flex;gap:14px;flex-wrap:wrap;margin-top:20px;color:#c5d1c7;font-size:13px}
    .editorial-list{border-top:2px solid var(--ink)}
    .editorial-row{display:grid;grid-template-columns:88px 1fr;gap:16px;padding:21px 0;border-bottom:1px solid var(--line);transition:.2s ease}
    .editorial-row:hover{padding-left:9px;background:#fffaf2}
    .editorial-row time{color:var(--orange);font-size:13px;font-weight:800;padding-top:3px}
    .editorial-row h3{font-size:17px;line-height:1.45;margin:0 0 5px}
    .editorial-row p{color:var(--muted);font-size:13px;margin:0}
    .notice-band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--paper)}
    .notice-grid{display:grid;grid-template-columns:180px 1fr 1fr;gap:30px;align-items:center;padding:29px 0}
    .notice-title{font-weight:800;font-size:18px}
    .notice-item{border-left:1px solid var(--line);padding-left:25px}
    .notice-item b{display:block;font-size:14px}
    .notice-item span{display:block;color:var(--muted);font-size:13px;margin-top:2px}
    .focus-grid{display:grid;grid-template-columns:.84fr 1.16fr;gap:44px;align-items:center}
    .visual-board{min-height:360px;border-radius:var(--radius-lg);background:#dbe4d8;position:relative;overflow:hidden;border:1px solid #cbd6cb}
    .visual-board:before{content:"问鼎 APP";position:absolute;left:10%;top:13%;color:var(--ink);font-size:38px;font-weight:900;z-index:2}
    .visual-board:after{content:"";position:absolute;right:9%;bottom:-60px;width:220px;height:380px;background:var(--paper);border:11px solid var(--ink);border-radius:28px;transform:rotate(9deg);box-shadow:14px 18px 0 rgba(23,37,31,.15)}
    .screen-lines{position:absolute;right:17%;bottom:73px;width:155px;height:185px;z-index:3;transform:rotate(9deg);padding:28px 18px}
    .screen-lines b,.screen-lines span{display:block}
    .screen-lines b{font-size:16px;margin-bottom:15px;color:var(--orange)}
    .screen-lines span{height:9px;background:var(--mist);margin-bottom:11px;border-radius:3px}
    .screen-lines span:nth-child(3){width:73%;background:var(--orange)}
    .focus-copy h2{font-size:clamp(28px,3vw,40px);line-height:1.25;margin:8px 0 17px}
    .focus-copy>p{color:var(--muted);margin-bottom:20px}
    .check-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
    .check-list li{position:relative;padding:0 0 12px 30px;border-bottom:1px solid var(--line)}
    .check-list li:before{content:"✓";position:absolute;left:0;top:2px;width:20px;height:20px;color:#fff;background:var(--success);border-radius:50%;font-size:12px;text-align:center;line-height:20px}
    .check-list span{display:block;color:var(--muted);font-size:13px;margin-top:2px}
    .scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .scene-card{background:var(--paper);border:1px solid var(--line);border-top:4px solid var(--amber);padding:25px 22px;min-height:210px;transition:.2s ease}
    .scene-card:hover{transform:translateY(-4px);border-top-color:var(--orange);box-shadow:var(--shadow)}
    .scene-num{font-size:13px;color:var(--orange);font-weight:800}
    .scene-card h3{font-size:18px;margin:27px 0 8px}
    .scene-card p{color:var(--muted);font-size:13px;margin:0}
    .service-list{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:2px solid var(--ink)}
    .service-item{display:flex;gap:17px;padding:25px 18px;border-bottom:1px solid var(--line)}
    .service-item:nth-child(odd){border-right:1px solid var(--line)}
    .service-icon{width:42px;height:42px;flex:0 0 42px;border-radius:7px;display:grid;place-items:center;background:#f4e6d8;color:var(--orange);font-size:20px;font-weight:800}
    .service-item h3{font-size:17px;margin:0 0 4px}
    .service-item p{font-size:13px;color:var(--muted);margin:0}
    .faq-wrap{display:grid;grid-template-columns:.75fr 1.25fr;gap:70px;align-items:start}
    .faq-lead h2{font-size:clamp(29px,3.3vw,43px);line-height:1.22;margin:8px 0 16px}
    .faq-lead p{color:var(--muted)}
    .faq-list{border-top:1px solid var(--line)}
    details{border-bottom:1px solid var(--line);padding:3px 0}
    summary{list-style:none;cursor:pointer;padding:18px 34px 18px 0;font-size:16px;font-weight:700;position:relative}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:5px;top:16px;color:var(--orange);font-size:24px;line-height:1;font-weight:400}
    details[open] summary:after{content:"−"}
    details p{margin:0;padding:0 28px 19px 0;color:var(--muted);font-size:14px}
    .download-cta{background:var(--orange);color:#fff;padding:55px 0;overflow:hidden;position:relative}
    .download-cta:after{content:"WEN DINHG";position:absolute;right:-10px;bottom:-29px;font-size:80px;font-weight:900;color:rgba(255,255,255,.13);white-space:nowrap}
    .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:30px;position:relative;z-index:1}
    .cta-inner h2{font-size:clamp(28px,3.3vw,42px);line-height:1.2;margin:7px 0}
    .cta-inner p{margin:0;color:#fff1e8}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap}
    .site-footer{background:var(--ink);color:#e2ebe2;padding:61px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:48px;padding-bottom:40px}
    .footer-brand{display:inline-block;color:#fff;font-size:21px;font-weight:800;margin-bottom:12px}
    .site-footer p{color:#adbbb1;font-size:13px;margin:5px 0}
    .site-footer h3{font-size:15px;color:#fff;margin:0 0 14px}
    .site-footer a:not(.footer-brand){display:block;color:#b9c7bd;font-size:13px;margin:8px 0;transition:.2s}
    .site-footer a:not(.footer-brand):hover{color:var(--amber);padding-left:3px}
    .copyright{border-top:1px solid rgba(255,255,255,.15);padding-top:20px;display:flex;justify-content:space-between;gap:16px;color:#93a398;font-size:12px}
    @media(max-width:1024px){
      .main-nav a{padding:8px 8px;font-size:13px}
      .brand{min-width:auto}
      .intro-grid{grid-template-columns:1fr 220px}
      .scene-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{width:min(100% - 32px,var(--container))}
      .site-header{height:68px}
      .nav-wrap{gap:12px}
      .brand-mark{width:34px;height:34px;font-size:16px}
      .brand strong{font-size:15px}
      .brand small{font-size:10px}
      .menu-toggle{display:block}
      .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--paper);padding:14px 16px 20px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);align-items:stretch;flex-direction:column}
      .main-nav.open{display:flex}
      .main-nav a{padding:12px}
      .nav-action{text-align:center;margin-top:4px}
      .page-intro{padding:36px 0}
      .page-intro:after{opacity:.24;right:-75px}
      .intro-grid,.news-layout,.focus-grid,.faq-wrap{grid-template-columns:1fr;gap:28px}
      .intro-stamp{border-left-width:3px;padding-left:14px}
      .section{padding:64px 0}
      .section-head{display:block;margin-bottom:27px}
      .section-head p{margin-top:12px}
      .feature-panel{min-height:330px;padding:28px}
      .feature-panel h2{font-size:27px}
      .notice-grid{grid-template-columns:1fr;gap:16px}
      .notice-item{border-left:0;border-top:1px solid var(--line);padding:14px 0 0}
      .service-list{grid-template-columns:1fr}
      .service-item:nth-child(odd){border-right:0}
      .cta-inner{display:block}
      .cta-actions{margin-top:22px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
      .footer-grid>div:first-child{grid-column:1/-1}
    }
    @media(max-width:520px){
      body{font-size:14px}
      .brand small{display:none}
      .page-intro h1{font-size:36px}
      .topic-row{align-items:flex-start}
      .topic-label{width:100%}
      .editorial-row{grid-template-columns:68px 1fr;gap:10px}
      .editorial-row h3{font-size:16px}
      .scene-grid{grid-template-columns:1fr}
      .scene-card{min-height:0}
      .visual-board{min-height:305px}
      .focus-copy h2{font-size:29px}
      .footer-grid{grid-template-columns:1fr}
      .footer-grid>div:first-child{grid-column:auto}
      .copyright{display:block}
      .copyright span{display:block;margin:5px 0}
      .cta-actions .btn{width:100%}
    }

/* roulang page: article */
:root{
      --ink:#17251f;
      --ink-2:#294039;
      --cream:#f7f5ef;
      --paper:#fffdf8;
      --mist:#eceee8;
      --line:#dfe4dc;
      --muted:#68766e;
      --orange:#e9783f;
      --orange-dark:#c85d2b;
      --amber:#f2b45c;
      --green:#537b62;
      --success:#2f8760;
      --radius:10px;
      --radius-lg:20px;
      --shadow:0 12px 35px rgba(23,37,31,.09);
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--cream);line-height:1.7;font-size:15px}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    button,input{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{height:78px;background:rgba(255,253,248,.95);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .nav-wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:flex;align-items:center;gap:12px;min-width:220px}
    .brand-mark{width:39px;height:39px;border-radius:11px;background:var(--orange);color:#fff;display:grid;place-items:center;font-weight:800;font-size:19px;box-shadow:4px 4px 0 var(--amber)}
    .brand strong{display:block;font-size:17px;letter-spacing:.02em}
    .brand small{display:block;color:var(--muted);font-size:11px;line-height:1.25;margin-top:2px}
    .main-nav{display:flex;align-items:center;gap:4px}
    .main-nav a{padding:9px 12px;border-radius:7px;color:#4f5e56;font-size:14px;transition:.2s ease}
    .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--ink);background:#eef1eb}
    .main-nav a.active{box-shadow:inset 0 -2px var(--orange)}
    .nav-action{background:var(--ink)!important;color:#fff!important;padding:11px 17px!important;border-radius:7px!important}
    .nav-action:hover{background:var(--orange)!important}
    .menu-toggle{display:none;background:var(--ink);color:#fff;border-radius:7px;padding:8px 11px}
    .page-intro{background:var(--ink);color:#fff;padding:76px 0 70px;position:relative;overflow:hidden}
    .page-intro:after{content:"WEN DINHG YU LE";position:absolute;right:4%;bottom:-22px;color:rgba(255,255,255,.055);font-size:clamp(42px,8vw,112px);font-weight:800;letter-spacing:-.06em;white-space:nowrap;pointer-events:none}
    .eyebrow,.section-label{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--amber);font-weight:700}
    .breadcrumb-line{display:flex;flex-wrap:wrap;gap:9px;color:#b8c9bc;font-size:13px;margin-bottom:25px;position:relative;z-index:1}
    .breadcrumb-line a:hover{color:#fff}
    .page-intro h1{font-size:clamp(32px,5vw,62px);line-height:1.18;letter-spacing:-.04em;max-width:900px;margin:0;position:relative;z-index:1;overflow-wrap:anywhere}
    .intro-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:25px;color:#c8d4ca;font-size:13px;position:relative;z-index:1}
    .tag{display:inline-block;padding:4px 9px;border-radius:5px;background:#f4e6d8;color:#a7552e;font-size:12px;font-weight:700}
    .article-layout{display:grid;grid-template-columns:minmax(0,780px) 290px;gap:70px;align-items:start;padding:74px 0 92px}
    .article-body{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);padding:clamp(25px,5vw,58px);box-shadow:0 8px 25px rgba(23,37,31,.045);min-width:0}
    .article-body h2{font-size:28px;line-height:1.3;margin:38px 0 15px;color:var(--ink)}
    .article-body h3{font-size:21px;line-height:1.4;margin:30px 0 12px}
    .article-body p{margin:0 0 20px;color:#405148}
    .article-body ul,.article-body ol{padding-left:24px;margin:0 0 24px;color:#405148}
    .article-body li{margin:8px 0}
    .article-body blockquote{margin:28px 0;padding:18px 22px;border-left:4px solid var(--orange);background:#fff4e9;color:var(--ink-2);border-radius:0 8px 8px 0}
    .article-body table{width:100%;border-collapse:collapse;margin:25px 0;display:block;overflow-x:auto}
    .article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;text-align:left;white-space:nowrap}
    .article-body th{background:var(--mist);color:var(--ink)}
    .article-body img{border-radius:8px;margin:25px auto}
    .article-body a{color:var(--orange-dark);text-decoration:underline;text-underline-offset:3px}
    .article-empty{padding:40px 0;text-align:center;color:var(--muted)}
    .side-column{position:sticky;top:105px}
    .side-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:25px;margin-bottom:18px}
    .side-card h2{font-size:17px;margin:0 0 17px}
    .side-card p{font-size:13px;color:var(--muted);margin:0 0 18px}
    .side-links{display:grid;gap:10px}
    .side-links a{padding:10px 12px;background:#f1f3ed;border-radius:7px;font-size:14px;transition:.2s}
    .side-links a:hover{background:#fff0df;color:var(--orange-dark);transform:translateX(3px)}
    .article-note{margin-top:30px;padding:20px 22px;background:#eef2eb;border:1px solid #dce6dc;border-radius:var(--radius);display:flex;gap:14px;align-items:flex-start}
    .note-icon{width:27px;height:27px;display:grid;place-items:center;border-radius:50%;background:var(--green);color:#fff;font-weight:700;flex:none}
    .article-note strong{display:block;margin-bottom:3px}
    .article-note span{display:block;color:var(--muted);font-size:13px}
    .article-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:35px;padding-top:28px;border-top:1px solid var(--line)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 19px;border-radius:7px;font-weight:700;transition:.2s ease;border:1px solid transparent}
    .btn-primary{background:var(--orange);color:#fff}
    .btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px)}
    .btn-dark{background:var(--ink);color:#fff}
    .btn-dark:hover{background:var(--green);transform:translateY(-2px)}
    .btn-outline{border-color:var(--line);color:var(--ink);background:transparent}
    .btn-outline:hover{border-color:var(--orange);color:var(--orange);background:#fff8ef}
    .related-section{padding:72px 0;background:#eef0e9}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}
    .section-head h2{font-size:clamp(27px,3vw,40px);line-height:1.2;letter-spacing:-.03em;margin:7px 0 0}
    .section-head p{color:var(--muted);max-width:500px;margin:0}
    .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .info-card{background:var(--paper);padding:25px;border:1px solid var(--line);border-radius:var(--radius);min-height:160px;transition:.2s}
    .info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d5b18e}
    .info-card h3{font-size:18px;line-height:1.45;margin:15px 0 8px}
    .info-card p{color:var(--muted);font-size:13px;margin:0 0 14px}
    .text-link{color:var(--orange-dark);font-weight:700;font-size:13px}
    .closing{padding:58px 0;background:var(--orange);color:#fff}
    .closing-inner{display:flex;align-items:center;justify-content:space-between;gap:25px}
    .closing h2{font-size:clamp(25px,3vw,38px);margin:0 0 8px;line-height:1.25}
    .closing p{margin:0;color:#fff3e8}
    .closing .btn-light{background:#fff;color:var(--ink)}
    .site-footer{background:var(--ink);color:#fff;padding:58px 0 22px}
    .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:50px;padding-bottom:42px}
    .footer-brand{font-size:22px;font-weight:800}
    .footer-grid p{color:#b9c8bd;font-size:13px;margin:8px 0}
    .footer-grid h3{font-size:14px;margin:2px 0 15px;color:var(--amber)}
    .footer-grid>div>a:not(.footer-brand){display:block;color:#c3d0c7;font-size:13px;margin:8px 0;transition:.2s}
    .footer-grid>div>a:not(.footer-brand):hover{color:#fff;padding-left:3px}
    .copyright{border-top:1px solid rgba(255,255,255,.14);padding-top:18px;display:flex;justify-content:space-between;gap:15px;color:#91a399;font-size:12px;flex-wrap:wrap}
    .btn:focus,.main-nav a:focus,summary:focus,.side-links a:focus{outline:3px solid rgba(242,180,92,.55);outline-offset:3px}
    @media (max-width:1024px){
      .main-nav{gap:0}
      .main-nav a{padding:8px 8px;font-size:13px}
      .article-layout{grid-template-columns:minmax(0,1fr) 245px;gap:32px}
    }
    @media (max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .site-header{height:70px}
      .brand{min-width:0}
      .brand strong{font-size:15px}
      .brand-mark{width:35px;height:35px;font-size:17px}
      .menu-toggle{display:block}
      .main-nav{display:none;position:absolute;top:70px;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);padding:12px 16px;flex-direction:column;align-items:stretch;box-shadow:var(--shadow)}
      .main-nav.open{display:flex}
      .main-nav a{padding:13px 12px}
      .nav-action{text-align:center;margin-top:5px}
      .page-intro{padding:55px 0 50px}
      .article-layout{display:block;padding:42px 0 60px}
      .side-column{position:static;margin-top:25px}
      .related-grid{grid-template-columns:1fr}
      .closing-inner{align-items:flex-start;flex-direction:column}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .footer-grid>div:first-child{grid-column:1/-1}
    }
    @media (max-width:520px){
      .page-intro h1{font-size:34px}
      .article-body{padding:23px 19px;border-radius:12px}
      .article-body h2{font-size:24px}
      .article-actions{display:grid}
      .article-actions .btn{width:100%}
      .footer-grid{grid-template-columns:1fr}
      .footer-grid>div:first-child{grid-column:auto}
      .copyright{display:block}
      .copyright span{display:block;margin-top:6px}
    }

/* roulang page: category2 */
:root{
      --ink:#17251f;
      --ink-2:#294039;
      --cream:#f7f5ef;
      --paper:#fffdf8;
      --mist:#eceee8;
      --line:#dfe4dc;
      --muted:#68766e;
      --orange:#e9783f;
      --orange-dark:#c85d2b;
      --amber:#f2b45c;
      --green:#537b62;
      --success:#2f8760;
      --radius:10px;
      --radius-lg:20px;
      --shadow:0 12px 35px rgba(23,37,31,.09);
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--cream);line-height:1.7;font-size:15px}
    a{color:inherit;text-decoration:none}
    a:hover{color:inherit}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{height:78px;background:rgba(255,253,248,.95);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .nav-wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:flex;align-items:center;gap:12px;min-width:220px}
    .brand-mark{width:39px;height:39px;border-radius:11px;background:var(--orange);color:#fff;display:grid;place-items:center;font-weight:800;font-size:19px;box-shadow:4px 4px 0 var(--amber)}
    .brand strong{display:block;font-size:17px;letter-spacing:.02em}
    .brand small{display:block;color:var(--muted);font-size:11px;line-height:1.25;margin-top:2px}
    .main-nav{display:flex;align-items:center;gap:4px}
    .main-nav a{padding:9px 12px;border-radius:7px;color:#4f5e56;font-size:14px;transition:.2s ease}
    .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--ink);background:#eef1eb}
    .main-nav a.active{box-shadow:inset 0 -2px var(--orange)}
    .nav-action{background:var(--ink)!important;color:#fff!important;padding:11px 17px!important;border-radius:7px!important}
    .nav-action:hover{background:var(--orange)!important}
    .menu-toggle{display:none;background:var(--ink);color:#fff;border-radius:7px;padding:8px 11px}
    .page-intro{padding:70px 0 66px;background:var(--paper);border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:24px}
    .breadcrumb a:hover{color:var(--orange)}
    .eyebrow,.section-label{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--orange-dark);font-weight:700}
    .page-intro h1{font-size:clamp(34px,5vw,58px);line-height:1.18;letter-spacing:-.04em;margin:13px 0 18px;max-width:760px}
    .page-intro p{font-size:17px;color:var(--muted);max-width:720px;margin:0}
    .topic-bar{background:var(--ink);color:#fff;padding:17px 0}
    .topic-inner{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
    .topic-inner strong{font-size:14px;margin-right:10px}
    .topic-chip{border:1px solid rgba(255,255,255,.2);color:#dce7dc;padding:6px 13px;border-radius:20px;font-size:13px;transition:.2s}
    .topic-chip:hover,.topic-chip:focus{border-color:var(--amber);color:#fff;background:rgba(242,180,92,.14)}
    .section{padding:86px 0}
    .section.soft{background:#eef0e9}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:32px}
    .section-head h2{font-size:clamp(27px,3vw,40px);line-height:1.2;letter-spacing:-.03em;margin:8px 0 0}
    .section-head p{color:var(--muted);max-width:520px;margin:0}
    .download-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:stretch}
    .download-panel{background:var(--ink);color:#fff;border-radius:var(--radius-lg);padding:38px;min-height:365px;position:relative;overflow:hidden}
    .download-panel:after{content:"APP";position:absolute;right:-18px;bottom:-42px;font-size:150px;font-weight:900;color:rgba(242,180,92,.1);line-height:1}
    .download-panel h2{font-size:34px;line-height:1.25;margin:15px 0}
    .download-panel p{color:#cbd8ce;max-width:520px}
    .meta-row{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0;color:var(--muted);font-size:13px}
    .download-panel .meta-row{color:#cbd8ce}
    .tag{display:inline-block;padding:4px 9px;border-radius:5px;background:#f4e6d8;color:#a7552e;font-size:12px;font-weight:700}
    .download-panel .tag{background:rgba(242,180,92,.18);color:#ffd08a}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 19px;border-radius:7px;font-weight:700;transition:.2s ease;border:1px solid transparent}
    .btn-primary{background:var(--orange);color:#fff}
    .btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px)}
    .btn-light{background:#fff;color:var(--ink)}
    .btn-light:hover{background:var(--amber);transform:translateY(-2px)}
    .btn-outline{border-color:#cbd6cb;color:var(--ink);background:transparent}
    .btn-outline:hover{border-color:var(--orange);color:var(--orange)}
    .btn:focus,.main-nav a:focus,summary:focus,.topic-chip:focus{outline:3px solid rgba(242,180,92,.55);outline-offset:3px}
    .device-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;display:flex;flex-direction:column;justify-content:space-between}
    .device-card h3{font-size:24px;margin:0 0 10px}
    .device-card p{color:var(--muted);margin:0 0 20px}
    .device-list{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:18px 0 26px}
    .device-list span{padding:10px 12px;background:var(--mist);border-radius:7px;font-size:13px}
    .device-list b{display:block;font-size:14px}
    .device-list small{color:var(--muted)}
    .download-note{font-size:12px;color:#a8b6aa;margin-top:17px}
    .cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
    .info-card{background:var(--paper);padding:28px;border:1px solid var(--line);border-radius:var(--radius);transition:.2s}
    .info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cbd6ca}
    .icon-box{width:42px;height:42px;border-radius:9px;background:#f4e6d8;color:var(--orange-dark);display:grid;place-items:center;font-weight:800;margin-bottom:22px}
    .info-card h3{font-size:19px;margin:0 0 10px}
    .info-card p{color:var(--muted);font-size:14px;margin:0}
    .feature-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:60px;align-items:center}
    .feature-copy h2{font-size:38px;line-height:1.25;margin:10px 0 18px}
    .feature-copy p{color:var(--muted)}
    .feature-list{display:grid;gap:18px;margin:24px 0 0;padding:0}
    .feature-list li{list-style:none;border-bottom:1px solid var(--line);padding:0 0 16px 34px;position:relative}
    .feature-list li:before{content:"✓";position:absolute;left:0;top:1px;width:22px;height:22px;background:var(--orange);color:#fff;border-radius:50%;font-size:13px;text-align:center;line-height:22px}
    .feature-list strong{display:block}
    .feature-list span{display:block;color:var(--muted);font-size:13px}
    .app-visual{min-height:360px;background:#dfe8de;border-radius:var(--radius-lg);position:relative;overflow:hidden;padding:30px}
    .app-visual:before{content:"";position:absolute;width:230px;height:410px;right:17%;top:34px;background:#fff;border:8px solid var(--ink);border-radius:27px;box-shadow:18px 22px 0 rgba(23,37,31,.14);transform:rotate(7deg)}
    .screen-content{position:absolute;z-index:1;right:calc(17% + 25px);top:91px;width:180px;transform:rotate(7deg)}
    .screen-top{height:45px;background:var(--ink);border-radius:10px 10px 0 0;color:#fff;padding:11px;font-weight:700}
    .screen-line{height:50px;background:#f7f5ef;border-bottom:1px solid var(--line);padding:12px;color:var(--ink-2);font-size:12px}
    .screen-line b{display:block;color:var(--orange-dark)}
    .visual-label{position:absolute;left:31px;bottom:30px;background:var(--paper);padding:15px 18px;border-left:4px solid var(--orange);font-weight:700}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .step{padding:25px 22px;border-right:1px solid var(--line)}
    .step:last-child{border-right:0}
    .step-num{color:var(--orange);font-weight:800;font-size:13px}
    .step h3{font-size:17px;margin:8px 0}
    .step p{color:var(--muted);font-size:13px;margin:0}
    .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper)}
    .compat-table{width:100%;border-collapse:collapse;min-width:620px}
    .compat-table th,.compat-table td{text-align:left;padding:17px 20px;border-bottom:1px solid var(--line)}
    .compat-table th{background:#eef1eb;font-size:13px;color:var(--ink-2)}
    .compat-table td{font-size:14px}
    .compat-table tr:last-child td{border-bottom:0}
    .status{color:var(--success);font-weight:700}
    .faq-list{max-width:850px;margin:auto}
    details{background:var(--paper);border-bottom:1px solid var(--line);padding:20px 22px}
    details:first-child{border-radius:10px 10px 0 0}
    details:last-child{border-radius:0 0 10px 10px}
    summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:20px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";color:var(--orange);font-size:22px;line-height:1}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);margin:13px 28px 0 0;font-size:14px}
    .cta-band{background:var(--orange);color:#fff;padding:48px 0}
    .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:25px}
    .cta-inner h2{font-size:30px;margin:0 0 7px}
    .cta-inner p{margin:0;color:#fff1e7}
    .site-footer{background:var(--ink);color:#fff;padding:62px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:45px}
    .footer-brand{font-size:22px;font-weight:800}
    .site-footer p{color:#b9c7bc;font-size:13px;margin:10px 0}
    .site-footer h3{font-size:14px;margin:5px 0 15px;color:var(--amber)}
    .site-footer a:not(.footer-brand){display:block;color:#c8d4ca;font-size:13px;margin:9px 0;transition:.2s}
    .site-footer a:not(.footer-brand):hover{color:var(--amber);padding-left:4px}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:42px;padding-top:19px;display:flex;justify-content:space-between;gap:15px;color:#9eada2;font-size:12px}
    @media(max-width:1024px){
      .main-nav a{padding:8px 8px;font-size:13px}
      .brand{min-width:190px}
      .download-layout,.feature-grid{grid-template-columns:1fr}
      .feature-grid{gap:35px}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .site-header{height:68px}
      .nav-wrap{gap:12px}
      .brand{min-width:0}
      .brand strong{font-size:15px}
      .brand small{font-size:10px}
      .brand-mark{width:35px;height:35px;font-size:16px}
      .menu-toggle{display:block}
      .main-nav{display:none;position:absolute;left:16px;right:16px;top:74px;background:var(--paper);border:1px solid var(--line);padding:10px;box-shadow:var(--shadow);border-radius:10px;flex-direction:column;align-items:stretch}
      .main-nav.open{display:flex}
      .main-nav a{padding:13px 14px}
      .nav-action{text-align:center}
      .page-intro{padding:50px 0 46px}
      .page-intro h1{font-size:38px}
      .section{padding:62px 0}
      .section-head{display:block;margin-bottom:24px}
      .section-head p{margin-top:12px}
      .cards{grid-template-columns:1fr}
      .steps{grid-template-columns:1fr 1fr}
      .step:nth-child(2){border-right:0}
      .step:nth-child(-n+2){border-bottom:1px solid var(--line)}
      .cta-inner{display:block}
      .cta-inner .btn{margin-top:22px}
      .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:6px}
    }
    @media(max-width:520px){
      .download-panel,.device-card{padding:25px}
      .download-panel h2{font-size:28px}
      .device-list{grid-template-columns:1fr}
      .app-visual{min-height:330px}
      .app-visual:before{right:8%;transform:rotate(5deg) scale(.86);transform-origin:top right}
      .screen-content{right:calc(8% + 22px);transform:rotate(5deg) scale(.86);transform-origin:top right}
      .steps{grid-template-columns:1fr}
      .step{border-right:0;border-bottom:1px solid var(--line)}
      .step:last-child{border-bottom:0}
      .footer-grid{grid-template-columns:1fr}
      .footer-grid>div:first-child{grid-column:auto}
    }

/* roulang page: category3 */
:root{
      --ink:#17251f;
      --ink-2:#294039;
      --cream:#f7f5ef;
      --paper:#fffdf8;
      --mist:#eceee8;
      --line:#dfe4dc;
      --muted:#68766e;
      --orange:#e9783f;
      --orange-dark:#c85d2b;
      --amber:#f2b45c;
      --green:#537b62;
      --success:#2f8760;
      --radius:10px;
      --radius-lg:20px;
      --shadow:0 12px 35px rgba(23,37,31,.09);
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--ink);font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.75}
    a{color:inherit;text-decoration:none}
    a:hover{color:inherit}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .site-header{height:78px;background:rgba(255,253,248,.95);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .nav-wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:25px}
    .brand{display:flex;align-items:center;gap:12px;min-width:220px}
    .brand-mark{width:39px;height:39px;border-radius:11px;background:var(--orange);color:#fff;display:grid;place-items:center;font-weight:800;font-size:19px;box-shadow:4px 4px 0 var(--amber)}
    .brand strong{display:block;font-size:17px;letter-spacing:.02em}
    .brand small{display:block;color:var(--muted);font-size:11px;line-height:1.25;margin-top:2px}
    .main-nav{display:flex;align-items:center;gap:4px}
    .main-nav a{padding:9px 12px;border-radius:7px;color:#4f5e56;font-size:14px;transition:.2s ease}
    .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--ink);background:#eef1eb}
    .main-nav a.active{box-shadow:inset 0 -2px var(--orange)}
    .main-nav .nav-action{background:var(--ink);color:#fff;padding:11px 17px}
    .main-nav .nav-action:hover{background:var(--orange);color:#fff}
    .menu-toggle{display:none;background:var(--ink);color:#fff;border-radius:7px;padding:8px 11px}
    .page-intro{background:var(--paper);border-bottom:1px solid var(--line);padding:68px 0 64px}
    .breadcrumb{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:25px}
    .breadcrumb span{color:#a1aaa2}
    .eyebrow,.section-label{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--orange-dark);font-weight:800}
    .intro-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:70px;align-items:end}
    .page-intro h1{font-size:clamp(36px,5vw,62px);line-height:1.13;letter-spacing:-.045em;margin:15px 0 20px}
    .page-intro p{max-width:690px;color:var(--muted);font-size:17px;margin:0}
    .intro-note{border-left:4px solid var(--orange);padding:19px 22px;background:#fff7ed;color:var(--ink-2)}
    .intro-note strong{display:block;font-size:18px;margin-bottom:5px}
    .intro-note span{display:block;color:var(--muted);font-size:13px}
    .section{padding:82px 0}
    .section.soft{background:#eef0e9}
    .section.dark{background:var(--ink);color:#fff}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:32px}
    .section-head h2{font-size:clamp(27px,3vw,40px);line-height:1.2;letter-spacing:-.03em;margin:8px 0 0}
    .section-head p{max-width:520px;color:var(--muted);margin:0}
    .dark .section-head p{color:#c4d0c7}
    .topic-bar{display:flex;flex-wrap:wrap;gap:10px;padding:16px 0;border-bottom:1px solid var(--line)}
    .topic-bar a,.topic-bar span{padding:8px 14px;border:1px solid var(--line);border-radius:6px;background:var(--paper);font-size:13px;color:var(--ink-2);transition:.2s}
    .topic-bar a:hover,.topic-bar span.active{background:var(--orange);border-color:var(--orange);color:#fff}
    .h5-panel{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:stretch}
    .device-stage{min-height:390px;border-radius:var(--radius-lg);background:var(--ink-2);position:relative;overflow:hidden;padding:35px}
    .device-stage:before{content:"";position:absolute;width:280px;height:280px;border:1px solid rgba(242,180,92,.45);border-radius:50%;right:-70px;top:-75px}
    .device-stage:after{content:"";position:absolute;width:170px;height:170px;border:1px solid rgba(255,255,255,.15);border-radius:50%;left:-60px;bottom:-65px}
    .device-copy{position:relative;z-index:1;color:#fff;max-width:280px}
    .device-copy h3{font-size:31px;line-height:1.2;margin:12px 0}
    .device-copy p{color:#c8d5cc;margin:0}
    .phone{position:absolute;right:52px;bottom:-34px;width:145px;height:275px;background:#f8f5ec;border:7px solid #d7dfd3;border-radius:24px;transform:rotate(8deg);box-shadow:12px 18px 25px rgba(0,0,0,.28);padding:42px 11px 12px}
    .phone:before{content:"问鼎H5";position:absolute;top:11px;left:15px;color:var(--orange);font-weight:800;font-size:17px}
    .phone-line{height:9px;background:#d6ded3;border-radius:8px;margin:13px 0}
    .phone-line.short{width:60%}
    .h5-info{background:var(--paper);border:1px solid var(--line);padding:32px;border-radius:var(--radius)}
    .h5-info h3{font-size:25px;margin:0 0 13px}
    .h5-info>p{color:var(--muted);margin:0 0 24px}
    .feature-list{list-style:none;padding:0;margin:0;display:grid;gap:15px}
    .feature-list li{position:relative;padding-left:34px;border-bottom:1px solid var(--line);padding-bottom:14px}
    .feature-list li:last-child{border-bottom:0}
    .feature-list li:before{content:"✓";position:absolute;left:0;top:2px;width:22px;height:22px;border-radius:50%;background:var(--orange);color:#fff;text-align:center;line-height:22px;font-size:13px}
    .feature-list strong{display:block}
    .feature-list span{display:block;color:var(--muted);font-size:13px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 19px;border-radius:7px;font-weight:700;border:1px solid transparent;transition:.2s ease}
    .btn-primary{background:var(--orange);color:#fff}
    .btn-primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-2px)}
    .btn-dark{background:var(--ink);color:#fff}
    .btn-dark:hover{background:var(--orange);color:#fff}
    .btn-outline{border-color:var(--line);background:transparent;color:var(--ink)}
    .btn-outline:hover{border-color:var(--orange);color:var(--orange)}
    .btn:focus,.main-nav a:focus,summary:focus{outline:3px solid rgba(242,180,92,.6);outline-offset:3px}
    .process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .process-card{background:var(--paper);border:1px solid var(--line);padding:25px;border-radius:var(--radius);min-height:190px}
    .process-number{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--orange);color:#fff;font-weight:800;margin-bottom:22px}
    .process-card h3{font-size:18px;margin:0 0 8px}
    .process-card p{color:var(--muted);font-size:13px;margin:0}
    .compatibility{display:grid;grid-template-columns:1fr 1.25fr;gap:48px;align-items:center}
    .compatibility h2{font-size:clamp(28px,3vw,42px);line-height:1.2;margin:10px 0 16px}
    .compatibility p{color:var(--muted);margin:0}
    .device-table{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
    .device-row{display:grid;grid-template-columns:1fr 1fr 1fr;padding:17px 22px;border-bottom:1px solid var(--line);gap:14px}
    .device-row:last-child{border-bottom:0}
    .device-row.header{background:var(--ink);color:#fff;font-weight:700}
    .device-row span{font-size:13px}
    .device-row:not(.header) span:nth-child(2){color:var(--success);font-weight:700}
    .dynamic-list{border-top:2px solid var(--ink)}
    .dynamic-item{display:grid;grid-template-columns:98px 110px 1fr auto;gap:18px;align-items:center;padding:19px 12px;border-bottom:1px solid var(--line);transition:.2s}
    .dynamic-item:hover{background:#fff8ee;padding-left:18px}
    .dynamic-item time{font-size:13px;color:var(--muted)}
    .dynamic-item h3{font-size:16px;line-height:1.4;margin:0}
    .dynamic-item p{font-size:13px;color:var(--muted);margin:4px 0 0}
    .tag{display:inline-block;padding:4px 9px;border-radius:5px;background:#f4e6d8;color:#a7552e;font-size:12px;font-weight:700;white-space:nowrap}
    .read-link{color:var(--orange-dark);font-weight:700;font-size:13px;white-space:nowrap}
    .empty-state{padding:42px;text-align:center;background:var(--paper);border:1px dashed #cbd3c9;color:var(--muted)}
    .empty-state strong{display:block;color:var(--ink);font-size:18px;margin-bottom:5px}
    .faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:55px}
    .faq-grid h2{font-size:36px;line-height:1.2;margin:10px 0 15px}
    .faq-grid>div>p{color:var(--muted)}
    .faq-list{border-top:1px solid var(--line)}
    details{border-bottom:1px solid var(--line);padding:18px 0}
    summary{cursor:pointer;font-weight:700;list-style:none;padding-right:25px;position:relative}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:0;color:var(--orange);font-size:22px;line-height:1}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);font-size:14px;margin:13px 0 0}
    .cta{padding:58px 0;background:#f4e6d8}
    .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:25px}
    .cta h2{font-size:32px;margin:0 0 8px}
    .cta p{color:var(--muted);margin:0}
    .cta-actions{display:flex;flex-wrap:wrap;gap:10px}
    .site-footer{background:var(--ink);color:#fff;padding:58px 0 25px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:50px;padding-bottom:45px}
    .footer-brand{font-size:22px;font-weight:800}
    .footer-grid p{color:#b8c7bd;font-size:13px;margin:9px 0}
    .footer-grid h3{font-size:15px;margin:0 0 15px}
    .footer-grid>div>a:not(.footer-brand){display:block;color:#b8c7bd;font-size:13px;padding:4px 0;transition:.2s}
    .footer-grid>div>a:not(.footer-brand):hover{color:var(--amber);padding-left:4px}
    .copyright{border-top:1px solid rgba(255,255,255,.13);padding-top:20px;display:flex;justify-content:space-between;gap:20px;color:#91a399;font-size:12px}
    @media (max-width:1024px){
      .main-nav a{padding-left:8px;padding-right:8px;font-size:13px}
      .brand{min-width:190px}
      .intro-grid,.h5-panel,.compatibility,.faq-grid{gap:30px}
      .process-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .site-header{height:70px}
      .nav-wrap{gap:12px}
      .brand{min-width:0}
      .brand strong{font-size:15px}
      .brand small{font-size:10px}
      .main-nav{display:none;position:absolute;left:16px;right:16px;top:78px;background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow);padding:10px;flex-direction:column;align-items:stretch}
      .main-nav.open{display:flex}
      .main-nav a{padding:12px 13px}
      .main-nav .nav-action{text-align:center}
      .menu-toggle{display:block}
      .page-intro{padding:44px 0 42px}
      .intro-grid{grid-template-columns:1fr}
      .page-intro h1{font-size:42px}
      .section{padding:60px 0}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .h5-panel,.compatibility,.faq-grid{grid-template-columns:1fr}
      .device-stage{min-height:350px}
      .dynamic-item{grid-template-columns:78px 1fr}
      .dynamic-item .tag{grid-column:2}
      .dynamic-item .read-link{grid-column:2}
      .process-grid{grid-template-columns:1fr 1fr}
      .cta-inner{display:block}
      .cta-actions{margin-top:22px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
      .footer-grid>div:first-child{grid-column:1/-1}
      .copyright{display:block}
      .copyright span{display:block;margin-top:6px}
    }
    @media (max-width:520px){
      .page-intro h1{font-size:35px}
      .process-grid{grid-template-columns:1fr}
      .device-stage{padding:25px;min-height:330px}
      .phone{right:25px;transform:rotate(6deg) scale(.88);transform-origin:bottom right}
      .h5-info{padding:24px}
      .device-row{grid-template-columns:1fr;gap:4px}
      .device-row.header{display:none}
      .device-row:not(.header){padding:15px 18px}
      .device-row:not(.header) span:first-child{font-weight:700}
      .footer-grid{grid-template-columns:1fr}
      .footer-grid>div:first-child{grid-column:auto}
      .cta h2{font-size:27px}
    }

/* roulang page: category4 */
:root{
      --ink:#17251f;
      --ink-2:#294039;
      --cream:#f7f5ef;
      --paper:#fffdf8;
      --mist:#eceee8;
      --line:#dfe4dc;
      --muted:#68766e;
      --orange:#e9783f;
      --orange-dark:#c85d2b;
      --amber:#f2b45c;
      --green:#537b62;
      --success:#2f8760;
      --radius:10px;
      --radius-lg:20px;
      --shadow:0 12px 35px rgba(23,37,31,.09);
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--cream);line-height:1.7;font-size:15px}
    a{color:inherit;text-decoration:none}
    a:hover{color:inherit}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{height:78px;background:rgba(255,253,248,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .nav-wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:flex;align-items:center;gap:12px;min-width:220px}
    .brand-mark{width:39px;height:39px;border-radius:11px;background:var(--orange);color:#fff;display:grid;place-items:center;font-weight:800;font-size:19px;box-shadow:4px 4px 0 var(--amber)}
    .brand strong{display:block;font-size:17px;letter-spacing:.02em}
    .brand small{display:block;color:var(--muted);font-size:11px;line-height:1.25;margin-top:2px}
    .main-nav{display:flex;align-items:center;gap:4px}
    .main-nav a{padding:9px 12px;border-radius:7px;color:#4f5e56;font-size:14px;transition:.2s ease}
    .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--ink);background:#eef1eb}
    .main-nav a.active{box-shadow:inset 0 -2px var(--orange)}
    .main-nav .nav-action{background:var(--ink)!important;color:#fff!important;padding:11px 17px!important;border-radius:7px!important}
    .main-nav .nav-action:hover{background:var(--orange)!important}
    .menu-toggle{display:none;background:var(--ink);color:#fff;border-radius:7px;padding:8px 11px}
    .page-title{background:var(--paper);border-bottom:1px solid var(--line);padding:70px 0 64px}
    .breadcrumb{display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:13px;margin-bottom:25px}
    .breadcrumb a:hover{color:var(--orange)}
    .eyebrow,.section-label{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--orange-dark);font-weight:800}
    .page-title h1{font-size:clamp(36px,5vw,62px);line-height:1.12;letter-spacing:-.045em;margin:13px 0 18px;max-width:760px}
    .page-title p{font-size:18px;color:var(--muted);max-width:700px;margin:0}
    .guide-tabs{background:var(--ink);color:#fff;padding:18px 0}
    .tab-row{display:flex;gap:10px;flex-wrap:wrap}
    .guide-tabs a,.guide-tabs span{border:1px solid rgba(255,255,255,.2);border-radius:6px;padding:8px 15px;color:#d8e2d9;font-size:13px;transition:.2s}
    .guide-tabs a:hover,.guide-tabs a:focus,.guide-tabs span.current{background:var(--orange);border-color:var(--orange);color:#fff}
    .section{padding:88px 0}
    .section.soft{background:#eef0e9}
    .section.dark{background:var(--ink);color:#fff}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:34px}
    .section-head h2{font-size:clamp(27px,3vw,42px);line-height:1.2;letter-spacing:-.03em;margin:8px 0 0}
    .section-head p{color:var(--muted);max-width:540px;margin:0}
    .dark .section-head p{color:#bbcac0}
    .steps{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
    .step{background:var(--paper);padding:27px 22px;min-height:190px}
    .step-number{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--orange);color:#fff;font-weight:800;margin-bottom:22px}
    .step h3{font-size:18px;margin:0 0 8px}
    .step p{font-size:13px;color:var(--muted);margin:0}
    .guide-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
    .guide-copy h2{font-size:clamp(28px,3vw,43px);line-height:1.2;margin:10px 0 18px}
    .guide-copy p{color:var(--muted);max-width:560px}
    .feature-list{display:grid;gap:16px;margin:27px 0 0;padding:0}
    .feature-list li{list-style:none;border-bottom:1px solid var(--line);padding:0 0 15px 34px;position:relative}
    .feature-list li:before{content:"✓";position:absolute;left:0;top:2px;width:22px;height:22px;background:var(--orange);color:#fff;border-radius:50%;font-size:13px;text-align:center;line-height:22px}
    .feature-list strong{display:block}
    .feature-list span{display:block;color:var(--muted);font-size:13px}
    .device-panel{min-height:390px;background:#dfe8dd;border-radius:var(--radius-lg);position:relative;overflow:hidden;padding:28px}
    .device-panel:after{content:"问鼎APP";position:absolute;right:-18px;bottom:15px;font-size:74px;font-weight:900;color:rgba(83,123,98,.16);transform:rotate(-12deg)}
    .device{position:relative;z-index:1;width:185px;height:335px;margin:0 auto;border:8px solid var(--ink);border-radius:25px;background:var(--paper);box-shadow:18px 18px 0 rgba(23,37,31,.14);overflow:hidden}
    .device-top{height:58px;background:var(--ink);color:#fff;padding:15px 14px;font-size:12px}
    .device-body{padding:20px 14px}
    .device-line{height:10px;background:#e8ece5;border-radius:4px;margin-bottom:12px}
    .device-line.orange{width:68%;background:var(--orange)}
    .device-card{height:92px;background:#f4e6d8;border-radius:8px;margin:20px 0;padding:13px;color:var(--orange-dark);font-weight:700;font-size:13px}
    .info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
    .info-card{background:var(--paper);padding:28px;border:1px solid var(--line);border-radius:var(--radius);transition:.2s}
    .info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .info-card .icon{font-size:25px;color:var(--orange);margin-bottom:17px}
    .info-card h3{font-size:19px;margin:0 0 9px}
    .info-card p{color:var(--muted);font-size:14px;margin:0}
    .compatibility{display:grid;grid-template-columns:1fr 1.5fr;gap:45px;align-items:start}
    .compatibility h2{font-size:34px;line-height:1.25;margin:8px 0 14px}
    .compatibility p{color:var(--muted)}
    .device-table{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
    .device-row{display:grid;grid-template-columns:1fr 1fr 1.4fr;gap:15px;padding:17px 20px;border-bottom:1px solid var(--line);font-size:14px}
    .device-row:last-child{border-bottom:0}
    .device-row.head{background:var(--ink);color:#fff;font-weight:700}
    .status{color:var(--success);font-weight:700}
    .faq-list{max-width:860px;margin:auto}
    details{border-bottom:1px solid var(--line);padding:20px 0}
    summary{cursor:pointer;list-style:none;font-size:17px;font-weight:700;display:flex;justify-content:space-between;gap:20px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";color:var(--orange);font-size:24px;line-height:1}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);margin:13px 30px 0 0}
    .resource-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .resource{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;min-height:185px;transition:.2s}
    .resource:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
    .tag{display:inline-block;padding:4px 9px;border-radius:5px;background:#f4e6d8;color:#a7552e;font-size:12px;font-weight:700;align-self:flex-start}
    .resource h3{font-size:18px;line-height:1.4;margin:17px 0 8px}
    .resource p{color:var(--muted);font-size:13px;margin:0 0 14px}
    .resource a{margin-top:auto;color:var(--orange-dark);font-weight:700;font-size:14px}
    .cta-band{background:var(--orange);color:#fff;padding:56px 0}
    .cta-content{display:flex;align-items:center;justify-content:space-between;gap:28px}
    .cta-content h2{font-size:clamp(26px,3vw,38px);margin:0 0 8px}
    .cta-content p{margin:0;color:#fff1e7}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 19px;border-radius:7px;font-weight:700;transition:.2s;border:1px solid transparent}
    .btn-primary{background:var(--orange);color:#fff}
    .btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px)}
    .btn-light{background:#fff;color:var(--ink)}
    .btn-light:hover{background:var(--amber);transform:translateY(-2px)}
    .btn-dark{background:var(--ink);color:#fff}
    .btn-dark:hover{background:var(--ink-2);transform:translateY(-2px)}
    .btn:focus,.main-nav a:focus,summary:focus,.menu-toggle:focus{outline:3px solid rgba(242,180,92,.6);outline-offset:3px}
    .site-footer{background:var(--ink);color:#fff;padding:58px 0 25px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:50px}
    .footer-brand{font-weight:800;font-size:22px}
    .footer-grid p{color:#adbbb1;font-size:13px;margin:9px 0}
    .footer-grid h3{font-size:15px;margin:0 0 15px}
    .footer-grid>div>a:not(.footer-brand){display:block;color:#adbbb1;font-size:13px;margin:8px 0;transition:.2s}
    .footer-grid>div>a:hover{color:var(--amber)}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:42px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;color:#91a198;font-size:12px}
    @media(max-width:1024px){
      .main-nav a{padding:8px 8px;font-size:13px}
      .brand{min-width:195px}
      .steps{grid-template-columns:repeat(3,1fr)}
      .guide-layout{gap:35px}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .site-header{height:68px}
      .nav-wrap{gap:12px}
      .brand{min-width:0}
      .brand-mark{width:35px;height:35px;font-size:17px}
      .brand strong{font-size:15px}
      .brand small{font-size:10px}
      .menu-toggle{display:block}
      .main-nav{display:none;position:absolute;left:16px;right:16px;top:62px;background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow);padding:10px;flex-direction:column;align-items:stretch}
      .main-nav.open{display:flex}
      .main-nav a{padding:12px 14px}
      .page-title{padding:50px 0 46px}
      .page-title h1{font-size:40px}
      .section{padding:64px 0}
      .section-head,.cta-content{display:block}
      .section-head p{margin-top:14px}
      .steps{grid-template-columns:repeat(2,1fr)}
      .guide-layout,.compatibility{grid-template-columns:1fr}
      .device-panel{min-height:350px}
      .info-grid,.resource-list{grid-template-columns:1fr}
      .cta-actions{margin-top:24px}
      .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){
      .steps{grid-template-columns:1fr}
      .step{min-height:auto}
      .device-row{grid-template-columns:1fr;gap:3px}
      .device-row.head{display:none}
      .device-row span:before{content:"";font-weight:700}
      .footer-grid{grid-template-columns:1fr}
      .footer-grid>div:first-child{grid-column:auto}
      .tab-row{display:grid;grid-template-columns:1fr 1fr}
      .guide-tabs a,.guide-tabs span{padding:8px 10px;text-align:center}
    }