/* roulang page: index */
:root{--ink:#071426;--navy:#0b1d35;--panel:#102a47;--panel2:#153858;--cyan:#48d7ee;--mint:#91f4d1;--white:#f4f8fc;--muted:#a9b9c9;--line:rgba(149,201,231,.19);--paper:#edf4f8;--darktext:#10263b;--radius:16px;--shadow:0 18px 55px rgba(0,9,25,.28);--glow:0 0 28px rgba(72,215,238,.22)}
        *,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--ink);color:var(--white);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none;transition:.25s ease}a:hover{text-decoration:underline;text-decoration-color:var(--cyan);text-underline-offset:5px;color:var(--cyan)}img{display:block;width:100%;height:auto}button,input,textarea,select{font:inherit}button{cursor:pointer}.container{width:min(1180px,calc(100% - 40px));margin:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(7,20,38,.9);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.topbar,.mainnav{display:flex;align-items:center}.topbar{height:68px;justify-content:space-between}.brand{font-weight:800;font-size:19px;letter-spacing:.02em;white-space:nowrap}.brand-mark{display:inline-flex;width:30px;height:30px;border:1px solid var(--cyan);border-radius:8px;align-items:center;justify-content:center;color:var(--cyan);margin-right:9px;box-shadow:var(--glow)}.tools{display:flex;gap:24px;color:var(--muted);font-size:13px;align-items:center}.header-cta,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:9px;border:1px solid var(--cyan);background:linear-gradient(135deg,#37cce6,#72ead7);color:#062033!important;font-weight:700;box-shadow:var(--glow);text-decoration:none!important}.header-cta{min-height:38px;padding:0 15px;font-size:13px}.btn.secondary{background:transparent;color:var(--white)!important;box-shadow:none;border-color:rgba(149,201,231,.4)}.btn:hover,.header-cta:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(72,215,238,.35)}.btn:focus,.header-cta:focus,.nav-toggle:focus,input:focus,textarea:focus,.faq-q:focus{outline:3px solid rgba(145,244,209,.65);outline-offset:3px}.mainnav{height:55px;border-top:1px solid rgba(149,201,231,.08);gap:27px}.mainnav a{font-size:14px;color:#c7d6e3;height:55px;display:flex;align-items:center;border-bottom:2px solid transparent}.mainnav a:hover,.mainnav a.active{color:var(--cyan);border-color:var(--cyan);text-decoration:none}.nav-toggle{display:none;background:none;color:var(--white);border:1px solid var(--line);border-radius:8px;padding:7px 11px}.hero{min-height:650px;position:relative;display:flex;align-items:center;overflow:hidden;background:linear-gradient(90deg,rgba(7,20,38,.98) 18%,rgba(7,20,38,.72) 53%,rgba(7,20,38,.38)),url('/assets/images/backpic/back-1.webp') center/cover}.hero:after{content:"";position:absolute;inset:auto 0 0;height:180px;background:linear-gradient(transparent,var(--ink));pointer-events:none}.hero-copy{position:relative;z-index:2;max-width:720px;padding:90px 0}.eyebrow,.tag{display:inline-flex;color:var(--cyan);border:1px solid rgba(72,215,238,.42);background:rgba(16,53,78,.6);padding:4px 10px;border-radius:5px;font-size:12px;letter-spacing:.08em}.hero h1{font-size:clamp(38px,5vw,68px);line-height:1.15;letter-spacing:-.045em;margin:22px 0 20px;max-width:700px}.hero p{font-size:18px;color:#d0deea;max-width:680px;margin-bottom:28px}.actions{display:flex;gap:13px;flex-wrap:wrap}.hero-meta{display:flex;gap:28px;margin-top:48px;color:var(--muted);font-size:13px}.hero-meta strong{display:block;color:var(--mint);font-size:20px}.section{padding:105px 0}.section.light{background:var(--paper);color:var(--darktext)}.section-head{max-width:720px;margin-bottom:42px}.section-head h2{font-size:clamp(27px,3.5vw,43px);line-height:1.25;margin:12px 0}.section-head p{color:var(--muted);font-size:16px}.light .section-head p{color:#5a6c7c}.split{display:grid;grid-template-columns:1fr 1fr;gap:65px;align-items:center}.media-frame{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#0c223d;box-shadow:var(--shadow);position:relative}.media-frame img{aspect-ratio:1.35;object-fit:cover}.media-label{position:absolute;left:18px;bottom:18px;background:rgba(7,20,38,.85);border:1px solid var(--line);padding:10px 14px;border-radius:8px;font-size:13px}.feature-list{display:grid;gap:15px}.feature-list li{list-style:none;padding:16px 0 16px 32px;border-bottom:1px solid var(--line);position:relative}.feature-list li:before{content:"";position:absolute;left:2px;top:27px;width:12px;height:12px;border-radius:50%;background:var(--cyan);box-shadow:0 0 15px var(--cyan)}.feature-list strong{display:block;font-size:17px}.feature-list span{display:block;color:var(--muted);font-size:14px}.group-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:16px}.group-card,.ability,.scene,.story,.quote,.news-item{background:linear-gradient(145deg,rgba(21,56,88,.82),rgba(9,29,52,.82));border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.3s}.group-card:first-child{grid-row:span 2;background:linear-gradient(145deg,#174467,#0b213b);min-height:330px}.group-card:hover,.ability:hover,.scene:hover,.story:hover,.news-item:hover{transform:translateY(-5px);border-color:rgba(72,215,238,.62);box-shadow:var(--glow)}h3{font-size:20px;line-height:1.4;margin:13px 0 9px}.card-text{color:var(--muted);font-size:14px;margin:0}.mini-list{padding:0;margin:18px 0 0}.mini-list li{list-style:none;color:#d3e0e9;padding:5px 0;font-size:14px}.mini-list li:before{content:"—";color:var(--cyan);margin-right:8px}.ability-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:16px}.ability{min-height:180px}.ability.big{grid-row:span 2;min-height:375px;background:linear-gradient(160deg,#0f3854,#10223b)}.ability strong{font-size:31px;color:var(--cyan)}.scene-strip{display:grid;grid-template-columns:repeat(6,1fr);gap:11px}.scene{padding:20px 16px;min-height:165px}.scene:nth-child(even){margin-top:28px}.scene .number{color:var(--mint);font-size:13px}.demo{display:grid;grid-template-columns:1.5fr .8fr;gap:26px;align-items:stretch}.demo-screen{background:#06172b;border:1px solid #1b5270;border-radius:14px;padding:18px;box-shadow:var(--shadow)}.window-bar{display:flex;gap:7px;padding-bottom:16px}.window-bar i{width:8px;height:8px;border-radius:50%;background:#48d7ee}.code{font:13px/2 monospace;color:#a3e6df;background:linear-gradient(90deg,#0c2d45,#081c32);padding:24px;border-radius:10px;min-height:250px;white-space:pre-wrap}.demo-aside{padding:22px;background:rgba(16,42,71,.68);border:1px solid var(--line);border-radius:14px}.light .param-table{width:100%;border-collapse:collapse}.param-table th,.param-table td{padding:17px 15px;text-align:left;border-bottom:1px solid #cbd8e0;font-size:14px}.param-table th{color:#537084;width:34%}.param-table td{font-weight:700}.case-section{background:linear-gradient(120deg,#081b32,#103653);position:relative}.case-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:16px}.case{min-height:260px;padding:27px;border-radius:var(--radius);border:1px solid var(--line);background:rgba(5,21,39,.56)}.case:first-child{background:linear-gradient(145deg,rgba(38,97,117,.75),rgba(7,28,49,.8))}.case-result{color:var(--mint);font-size:14px;margin-top:28px}.timeline{display:flex;gap:0;position:relative;margin-top:30px}.step{flex:1;padding:22px 18px 18px;border-top:2px solid #2e748c;position:relative}.step:before{content:"";position:absolute;top:-8px;left:18px;width:14px;height:14px;background:var(--cyan);border-radius:50%;box-shadow:0 0 15px var(--cyan)}.step b{font-size:18px}.step p{color:var(--muted);font-size:14px;margin-top:10px}.stats{padding:45px 0;background:#061a30;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.stat{text-align:center;border-right:1px solid var(--line)}.stat:last-child{border:0}.stat strong{font-size:38px;color:var(--cyan);display:block}.stat span{font-size:13px;color:var(--muted)}.quote-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}.quote{padding:32px;min-height:190px}.quote p{font-size:20px;line-height:1.6;margin-top:0}.quote small{color:var(--mint)}.story-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:18px}.story{min-height:220px}.story img{height:150px;object-fit:cover;border-radius:10px;margin-bottom:18px}.news-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}.news-list{display:grid;gap:10px}.news-item{display:grid;grid-template-columns:95px 1fr;gap:20px;padding:19px 22px}.news-date{color:var(--mint);font-size:13px}.news-item h3{font-size:17px;margin:0}.news-item p{font-size:13px}.topic-panel{background:linear-gradient(145deg,#173a59,#0b2039);border-radius:var(--radius);padding:29px}.topic-panel h3{color:var(--cyan)}.faq{max-width:850px}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;min-height:64px;background:none;border:0;color:var(--white);text-align:left;padding:18px 42px 18px 0;font-weight:700;position:relative}.faq-q:after{content:"+";position:absolute;right:8px;font-size:24px;color:var(--cyan)}.faq-q[aria-expanded=true]:after{content:"−"}.faq-a{display:none;color:var(--muted);font-size:14px;padding:0 35px 20px 0}.faq-a.open{display:block}.cta-panel{border:1px solid rgba(72,215,238,.5);border-radius:20px;padding:48px;background:radial-gradient(circle at 80% 20%,rgba(55,139,163,.35),transparent 42%),#0e2a47;box-shadow:var(--glow)}.cta-panel h2{font-size:38px;line-height:1.3;margin:0 0 10px}.cta-panel>p{color:#c4d5e0;max-width:680px}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px;margin-top:25px}.form-field label{display:block;font-size:13px;color:#bdd0dd;margin-bottom:6px}.form-field input,.form-field textarea,.form-field select{width:100%;border:1px solid var(--line);background:#081c32;color:var(--white);border-radius:8px;padding:12px 13px;min-height:46px}.form-field textarea{min-height:110px;resize:vertical}.full{grid-column:1/-1}.form-note{color:var(--muted);font-size:12px;margin-top:10px}.site-footer{padding:58px 0 25px;background:#040e1c;border-top:1px solid var(--line);color:var(--muted)}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:35px}.site-footer h3{font-size:15px;color:var(--white);margin:0 0 15px}.site-footer a{display:block;font-size:13px;padding:4px 0}.footer-brand p{font-size:13px;max-width:280px}.copyright{border-top:1px solid var(--line);margin-top:40px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}.reveal{animation:rise .7s ease both}@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
        @media(max-width:1024px){.scene-strip{grid-template-columns:repeat(3,1fr)}.group-grid,.case-grid{grid-template-columns:repeat(2,1fr)}.group-card:first-child{grid-row:auto}.ability-grid{grid-template-columns:repeat(2,1fr)}.ability.big{grid-row:auto}.hero{min-height:590px}.mainnav{gap:16px}.mainnav a{font-size:13px}.footer-grid{grid-template-columns:repeat(2,1fr)}}
        @media(max-width:640px){.container{width:min(100% - 28px,560px)}.topbar{height:62px}.tools{display:none}.brand{font-size:15px}.brand-mark{width:25px;height:25px}.nav-toggle{display:block}.mainnav{display:none;height:auto;padding:7px 0 14px;flex-direction:column;align-items:stretch;gap:0}.mainnav.open{display:flex}.mainnav a{height:46px;padding:0 8px}.hero{min-height:610px;background-position:64% center}.hero-copy{padding:70px 0}.hero h1{font-size:39px}.hero p{font-size:16px}.hero-meta{gap:18px;margin-top:32px}.section{padding:70px 0}.split,.demo,.quote-layout,.story-grid,.news-layout{grid-template-columns:1fr;gap:28px}.group-grid,.case-grid,.ability-grid{grid-template-columns:1fr}.scene-strip{grid-template-columns:repeat(2,1fr)}.scene:nth-child(even){margin-top:0}.timeline{display:grid;gap:0}.step{border-top:0;border-left:2px solid #2e748c;padding:12px 14px 22px 28px}.step:before{left:-8px;top:13px}.stat-grid{grid-template-columns:repeat(2,1fr);gap:20px}.stat{border-right:0}.stat strong{font-size:30px}.news-item{grid-template-columns:72px 1fr;gap:10px}.form-grid{grid-template-columns:1fr}.full{grid-column:auto}.cta-panel{padding:30px 20px}.cta-panel h2{font-size:29px}.footer-grid{grid-template-columns:1fr;gap:25px}.copyright{display:block}.copyright span{display:block;margin-top:7px}}
        @media(max-width:375px){.container{width:calc(100% - 24px)}.hero h1{font-size:34px}.actions .btn{width:100%}.scene-strip{grid-template-columns:1fr}.hero-meta{gap:12px}.hero-meta strong{font-size:17px}}

/* roulang page: category1 */
:root{--ink:#071426;--navy:#0b1d35;--panel:#102a47;--panel2:#153858;--cyan:#48d7ee;--mint:#91f4d1;--white:#f4f8fc;--muted:#a9b9c9;--line:rgba(149,201,231,.19);--paper:#edf4f8;--darktext:#10263b;--radius:16px;--shadow:0 18px 55px rgba(0,9,25,.28);--glow:0 0 28px rgba(72,215,238,.22)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--ink);color:var(--white);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none;transition:.25s ease}a:hover{color:var(--cyan);text-decoration:underline;text-decoration-color:var(--cyan);text-underline-offset:5px}img{display:block;width:100%;height:auto}button,input,textarea,select{font:inherit}button{cursor:pointer}.container{width:min(1180px,calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:30;background:rgba(7,20,38,.91);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.topbar,.mainnav{display:flex;align-items:center}.topbar{height:68px;justify-content:space-between}.brand{font-weight:800;font-size:19px;letter-spacing:.02em;white-space:nowrap}.brand-mark{display:inline-flex;width:30px;height:30px;border:1px solid var(--cyan);border-radius:8px;align-items:center;justify-content:center;color:var(--cyan);margin-right:9px;box-shadow:var(--glow)}.tools{display:flex;align-items:center;gap:20px;color:var(--muted);font-size:13px}.header-cta,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:9px;border:1px solid var(--cyan);background:linear-gradient(135deg,#37cce6,#72ead7);color:#062033!important;font-weight:700;box-shadow:var(--glow);text-decoration:none!important}.header-cta{min-height:38px;padding:0 15px;font-size:13px}.btn.secondary{background:transparent;color:var(--white)!important;border-color:rgba(149,201,231,.42);box-shadow:none}.btn:hover,.header-cta:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(72,215,238,.35)}.btn:active,.header-cta:active{transform:translateY(0)}.btn:focus,.header-cta:focus,.nav-toggle:focus,.faq-q:focus,input:focus,textarea:focus,select:focus{outline:3px solid rgba(145,244,209,.66);outline-offset:3px}.mainnav{height:55px;border-top:1px solid rgba(149,201,231,.08);gap:27px}.mainnav a{height:55px;display:flex;align-items:center;border-bottom:2px solid transparent;color:#c7d6e3;font-size:14px;white-space:nowrap}.mainnav a:hover,.mainnav a.active{color:var(--cyan);border-color:var(--cyan);text-decoration:none}.nav-toggle{display:none;background:none;color:var(--white);border:1px solid var(--line);border-radius:8px;padding:8px 12px}
.inner-hero{position:relative;overflow:hidden;padding:76px 0 70px;background:linear-gradient(90deg,rgba(7,20,38,.98),rgba(7,20,38,.72)),url('/assets/images/backpic/back-4.webp') center/cover}.inner-hero:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,var(--ink),transparent 55%);pointer-events:none}.inner-copy{position:relative;z-index:1;max-width:790px}.breadcrumb{display:flex;gap:10px;align-items:center;color:#b8cbd9;font-size:13px;margin-bottom:22px}.breadcrumb span{color:var(--cyan)}.eyebrow,.tag{display:inline-flex;align-items:center;border:1px solid rgba(72,215,238,.42);background:rgba(16,53,78,.67);color:var(--cyan);border-radius:5px;padding:4px 10px;font-size:12px;letter-spacing:.07em}.inner-hero h1{font-size:clamp(35px,5vw,58px);line-height:1.18;letter-spacing:-.04em;margin:18px 0}.inner-hero p{max-width:720px;color:#d3e0ea;font-size:17px;margin:0}.section{padding:92px 0}.section.light{background:var(--paper);color:var(--darktext)}.section-head{max-width:760px;margin-bottom:38px}.section-head h2{margin:10px 0;font-size:clamp(27px,3.5vw,42px);line-height:1.25}.section-head p{color:var(--muted);margin:0}.light .section-head p{color:#587083}
.channel-grid{display:grid;grid-template-columns:280px 1fr;gap:28px}.channel-nav{height:max-content;position:sticky;top:145px;padding:18px;border:1px solid var(--line);border-radius:var(--radius);background:rgba(16,42,71,.8)}.channel-nav h2{font-size:16px;margin:0 0 12px}.channel-nav a{display:block;padding:12px 11px;border-left:2px solid transparent;color:#c8d9e6;font-size:14px}.channel-nav a:hover,.channel-nav a.current{color:var(--cyan);background:rgba(72,215,238,.08);border-left-color:var(--cyan);text-decoration:none}.channel-note{padding:26px;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(140deg,#153a5c,#0b2038)}.channel-note h3{margin:0 0 8px;font-size:21px}.channel-note p{color:var(--muted);margin:0}
.platform-list{display:grid;grid-template-columns:1.15fr .85fr;gap:17px}.platform-card{position:relative;overflow:hidden;min-height:248px;padding:27px;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(145deg,rgba(21,56,88,.93),rgba(9,29,52,.92));transition:.28s}.platform-card.large{grid-row:span 2;min-height:513px;background:linear-gradient(145deg,#17496e,#0a233e)}.platform-card:hover{transform:translateY(-5px);border-color:rgba(72,215,238,.72);box-shadow:var(--glow)}.platform-card h3{font-size:22px;line-height:1.35;margin:14px 0 9px}.platform-card p{color:var(--muted);font-size:14px;margin:0}.platform-card ul{padding:0;margin:16px 0}.platform-card li{list-style:none;padding:5px 0;color:#d6e4ed;font-size:14px}.platform-card li:before{content:"—";color:var(--cyan);margin-right:8px}.card-index{font-size:13px;color:var(--mint);font-weight:700}.more-link{display:inline-block;margin-top:28px;font-weight:700;color:var(--cyan)}
.split-panel{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}.media-frame{position:relative;overflow:hidden;border-radius:var(--radius);border:1px solid var(--line);background:#0c223d;box-shadow:var(--shadow)}.media-frame img{aspect-ratio:1.18;object-fit:cover}.media-label{position:absolute;left:16px;bottom:16px;padding:9px 12px;border-radius:7px;border:1px solid var(--line);background:rgba(7,20,38,.85);font-size:13px}.detail-list{padding:0;margin:23px 0}.detail-list li{list-style:none;position:relative;padding:14px 0 14px 29px;border-bottom:1px solid var(--line)}.detail-list li:before{content:"";position:absolute;left:1px;top:25px;width:11px;height:11px;border-radius:50%;background:var(--cyan);box-shadow:0 0 14px var(--cyan)}.detail-list strong{display:block;font-size:17px}.detail-list span{display:block;color:var(--muted);font-size:14px}
.architecture{display:grid;grid-template-columns:.85fr 1.35fr;gap:30px;align-items:start}.process-intro{padding:27px;border-radius:var(--radius);background:#dbeaf1;border:1px solid #c3d8e2}.process-intro h3{margin:0 0 10px;font-size:24px}.process-intro p{margin:0;color:#486173}.flow{position:relative;padding:0;margin:0}.flow li{list-style:none;position:relative;margin-bottom:15px;padding:19px 22px 19px 67px;border-radius:12px;background:#fff;border:1px solid #d3e1e8;box-shadow:0 7px 21px rgba(30,65,90,.08)}.flow li:before{content:attr(data-step);position:absolute;left:18px;top:18px;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#0d3452;color:var(--cyan);font-size:12px;font-weight:800}.flow strong{display:block;color:#133149}.flow span{display:block;color:#5c7180;font-size:14px}
.matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.matrix-item{min-height:190px;padding:25px;border:1px solid var(--line);border-radius:var(--radius);background:rgba(16,42,71,.75);transition:.25s}.matrix-item:hover{background:rgba(22,64,96,.9);border-color:var(--cyan);transform:translateY(-4px)}.matrix-item h3{margin:12px 0 8px;font-size:20px}.matrix-item p{margin:0;color:var(--muted);font-size:14px}.matrix-item .tag{font-size:11px}
.faq{max-width:890px}.faq-item{border-bottom:1px solid var(--line)}.faq-q{position:relative;width:100%;min-height:65px;padding:18px 45px 18px 0;text-align:left;background:none;border:0;color:var(--white);font-weight:700}.faq-q:after{content:"+";position:absolute;right:8px;font-size:25px;color:var(--cyan)}.faq-q[aria-expanded="true"]:after{content:"−"}.faq-a{display:none;padding:0 38px 21px 0;color:var(--muted);font-size:14px}.faq-a.open{display:block}.cta-panel{display:grid;grid-template-columns:1fr .9fr;gap:40px;padding:47px;border:1px solid rgba(72,215,238,.52);border-radius:20px;background:radial-gradient(circle at 85% 12%,rgba(67,165,190,.27),transparent 37%),#0d2947;box-shadow:var(--glow)}.cta-panel h2{font-size:clamp(28px,3.5vw,42px);line-height:1.25;margin:12px 0}.cta-panel p{color:#c4d5e1}.contact-form{display:grid;gap:12px}.contact-form label{font-size:13px;color:#d6e4ed}.contact-form input,.contact-form textarea,.contact-form select{width:100%;margin-top:4px;padding:11px 13px;border:1px solid rgba(149,201,231,.3);border-radius:8px;background:rgba(4,18,34,.68);color:var(--white)}.contact-form textarea{min-height:82px;resize:vertical}.form-note{margin:0;color:var(--muted);font-size:12px}.site-footer{padding:63px 0 22px;background:#061120;border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:34px}.footer-grid h3{margin:0 0 14px;font-size:15px;color:var(--white)}.footer-grid p{margin:12px 0;color:var(--muted);font-size:14px}.footer-grid a:not(.brand){display:block;margin:8px 0;color:#b7c8d6;font-size:14px}.copyright{display:flex;justify-content:space-between;gap:15px;margin-top:38px;padding-top:20px;border-top:1px solid rgba(149,201,231,.14);color:#8297a9;font-size:12px}
@media(max-width:1024px){.tools>span:first-child{display:none}.channel-grid{grid-template-columns:230px 1fr}.matrix{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:768px){.topbar{height:62px}.tools{display:none}.nav-toggle{display:block}.mainnav{display:none;height:auto;padding:8px 0 14px;gap:0;flex-direction:column;align-items:stretch}.mainnav.open{display:flex}.mainnav a{height:45px;padding:0 10px;border-bottom:0;border-left:2px solid transparent}.mainnav a.active{border-left-color:var(--cyan);background:rgba(72,215,238,.08)}.inner-hero{padding:56px 0}.channel-grid,.split-panel,.architecture,.cta-panel{grid-template-columns:1fr}.channel-nav{position:static}.platform-list{grid-template-columns:1fr}.platform-card.large{grid-row:auto;min-height:auto}.section{padding:70px 0}.footer-grid{gap:26px}}@media(max-width:520px){.container{width:min(100% - 28px,1180px)}.brand{font-size:16px}.brand-mark{width:27px;height:27px;margin-right:6px}.inner-hero h1{font-size:34px}.inner-hero p{font-size:15px}.section-head h2{font-size:28px}.matrix{grid-template-columns:1fr}.platform-card{min-height:auto;padding:22px}.cta-panel{padding:28px 20px}.footer-grid{grid-template-columns:1fr}.copyright{flex-direction:column}.btn{width:100%}.breadcrumb{font-size:12px}}

/* roulang page: category2 */
:root{--ink:#071426;--navy:#0b1d35;--panel:#102a47;--panel2:#153858;--cyan:#48d7ee;--mint:#91f4d1;--white:#f4f8fc;--muted:#a9b9c9;--line:rgba(149,201,231,.19);--paper:#edf4f8;--darktext:#10263b;--radius:16px;--shadow:0 18px 55px rgba(0,9,25,.28);--glow:0 0 28px rgba(72,215,238,.22)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--ink);color:var(--white);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none;transition:.25s ease}a:hover{color:var(--cyan);text-decoration:underline;text-decoration-color:var(--cyan);text-underline-offset:5px}img{display:block;width:100%;height:auto}button,input,textarea,select{font:inherit}button{cursor:pointer}.container{width:min(1180px,calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(7,20,38,.9);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.topbar,.mainnav{display:flex;align-items:center}.topbar{height:68px;justify-content:space-between}.brand{font-weight:800;font-size:19px;letter-spacing:.02em;white-space:nowrap}.brand-mark{display:inline-flex;width:30px;height:30px;border:1px solid var(--cyan);border-radius:8px;align-items:center;justify-content:center;color:var(--cyan);margin-right:9px;box-shadow:var(--glow)}.tools{display:flex;align-items:center;gap:18px;color:var(--muted);font-size:13px}.header-cta,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:9px;border:1px solid var(--cyan);background:linear-gradient(135deg,#37cce6,#72ead7);color:#062033!important;font-weight:700;box-shadow:var(--glow);text-decoration:none!important;transition:.25s ease}.header-cta{min-height:38px;padding:0 15px;font-size:13px}.btn.secondary{background:transparent;color:var(--white)!important;box-shadow:none;border-color:rgba(149,201,231,.4)}.btn:hover,.header-cta:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(72,215,238,.35)}.btn:active,.header-cta:active{transform:translateY(0)}.btn:focus,.header-cta:focus,.nav-toggle:focus,.faq-q:focus,input:focus,textarea:focus{outline:3px solid rgba(145,244,209,.65);outline-offset:3px}.mainnav{height:55px;border-top:1px solid rgba(149,201,231,.08);gap:27px}.mainnav a{font-size:14px;color:#c7d6e3;height:55px;display:flex;align-items:center;border-bottom:2px solid transparent}.mainnav a:hover,.mainnav a.active{color:var(--cyan);border-color:var(--cyan);text-decoration:none}.nav-toggle{display:none;background:none;color:var(--white);border:1px solid var(--line);border-radius:8px;padding:8px 12px}
.page-hero{padding:74px 0 66px;background:linear-gradient(105deg,rgba(7,20,38,.96),rgba(7,20,38,.67)),url('/assets/images/backpic/back-4.webp') center/cover;position:relative;border-bottom:1px solid var(--line)}.crumbs{font-size:13px;color:var(--muted);margin-bottom:22px}.crumbs a{color:var(--cyan)}.eyebrow,.tag{display:inline-flex;color:var(--cyan);border:1px solid rgba(72,215,238,.42);background:rgba(16,53,78,.64);padding:4px 10px;border-radius:5px;font-size:12px;letter-spacing:.07em}.page-hero h1{font-size:clamp(34px,5vw,57px);line-height:1.2;letter-spacing:-.04em;max-width:820px;margin:18px 0}.page-hero p{max-width:760px;margin:0;color:#d0deea;font-size:17px}.hero-points{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.hero-points span{font-size:13px;color:var(--mint);padding:7px 12px;border:1px solid rgba(145,244,209,.25);background:rgba(5,30,46,.48);border-radius:7px}
.section{padding:88px 0}.section.light{background:var(--paper);color:var(--darktext)}.section-head{max-width:745px;margin-bottom:35px}.section-head h2{font-size:clamp(27px,3.4vw,42px);line-height:1.25;margin:12px 0}.section-head p{margin:0;color:var(--muted)}.light .section-head p{color:#526778}.split{display:grid;grid-template-columns:270px 1fr;gap:28px;align-items:start}.channel-nav{position:sticky;top:145px;border:1px solid var(--line);background:rgba(16,42,71,.7);border-radius:var(--radius);padding:16px}.channel-nav h2{font-size:15px;margin:0 0 9px;color:var(--mint)}.channel-nav a{display:block;padding:11px 10px;border-bottom:1px solid rgba(149,201,231,.12);font-size:14px;color:#cadbe7}.channel-nav a:last-child{border-bottom:0}.channel-nav a:hover{background:rgba(72,215,238,.08);border-radius:7px;text-decoration:none}
.arch-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:18px}.arch-main,.module-card,.flow-card{border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(145deg,rgba(21,56,88,.87),rgba(9,29,52,.9));box-shadow:var(--shadow)}.arch-main{padding:28px;min-height:300px}.arch-main h3{font-size:25px;margin:5px 0 12px}.arch-main p,.module-card p,.flow-card p{color:var(--muted);font-size:14px;margin:0}.module-stack{display:grid;gap:18px}.module-card{padding:21px}.module-card h3{font-size:18px;margin:0 0 8px;color:var(--white)}.module-card:hover,.arch-main:hover,.flow-card:hover{transform:translateY(-4px);border-color:rgba(72,215,238,.65);box-shadow:var(--glow)}.module-card,.arch-main,.flow-card{transition:.28s ease}.architecture-list{display:grid;grid-template-columns:repeat(2,1fr);gap:11px;margin-top:24px}.architecture-list span{padding:11px 13px;background:rgba(72,215,238,.08);border-left:2px solid var(--cyan);font-size:13px;color:#d9e8f2}
.feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:17px}.feature-row{position:relative;min-height:164px;padding:24px 24px 20px 75px;background:#fff;border:1px solid #d5e1e8;border-radius:13px;box-shadow:0 10px 30px rgba(18,49,72,.08);transition:.25s}.feature-row:before{content:attr(data-no);position:absolute;left:21px;top:23px;color:#1c829c;font-size:15px;font-weight:800}.feature-row h3{font-size:19px;margin:0 0 8px}.feature-row p{font-size:14px;color:#536879;margin:0}.feature-row:hover{transform:translateY(-4px);border-color:#58bfd4;box-shadow:0 16px 35px rgba(16,93,117,.15)}
.media-layout{display:grid;grid-template-columns:1fr .95fr;gap:48px;align-items:center}.media-frame{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#102a47}.media-frame img{aspect-ratio:1.2;object-fit:cover}.media-note{position:absolute;left:16px;right:16px;bottom:16px;padding:12px 14px;background:rgba(7,20,38,.86);border:1px solid var(--line);border-radius:9px;font-size:13px}.checklist{margin:21px 0 0;padding:0}.checklist li{list-style:none;position:relative;padding:11px 0 11px 27px;border-bottom:1px solid var(--line);color:#d6e3eb}.checklist li:before{content:"";position:absolute;left:1px;top:21px;width:11px;height:11px;border-radius:50%;background:var(--mint);box-shadow:0 0 12px var(--mint)}
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.flow-card{padding:22px;position:relative}.flow-card .step{font-size:12px;color:var(--cyan);letter-spacing:.1em}.flow-card h3{font-size:18px;margin:10px 0}.flow-card ul{padding:0;margin:14px 0 0}.flow-card li{list-style:none;font-size:13px;color:#c7d7e4;padding:3px 0}.flow-card li:before{content:"·";color:var(--cyan);margin-right:7px}.parameter-panel{margin-top:24px;border-radius:var(--radius);overflow:hidden;border:1px solid #cbdce5}.parameter-panel dl{display:grid;grid-template-columns:220px 1fr;margin:0}.parameter-panel dt,.parameter-panel dd{margin:0;padding:14px 18px;border-bottom:1px solid #d5e1e8;font-size:14px}.parameter-panel dt{font-weight:800;background:#e1edf3}.parameter-panel dd{background:#fff;color:#40576a}
.scene-matrix{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:17px}.scene{padding:26px;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(145deg,rgba(20,58,90,.82),rgba(8,28,50,.9));min-height:230px}.scene:first-child{background:linear-gradient(145deg,#185273,#0b233f)}.scene h3{margin:12px 0 10px;font-size:21px}.scene p{color:var(--muted);font-size:14px;margin:0}.scene small{color:var(--mint)}.faq{max-width:900px}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;min-height:64px;background:none;border:0;color:var(--white);text-align:left;padding:18px 42px 18px 0;font-weight:700;position:relative}.faq-q:after{content:"+";position:absolute;right:8px;font-size:24px;color:var(--cyan)}.faq-q[aria-expanded=true]:after{content:"−"}.faq-a{display:none;color:var(--muted);font-size:14px;padding:0 34px 21px 0}.faq-a.open{display:block}
.cta-panel{border:1px solid rgba(72,215,238,.5);border-radius:20px;padding:45px;background:radial-gradient(circle at 85% 10%,rgba(55,139,163,.35),transparent 40%),#0e2a47;box-shadow:var(--glow)}.cta-layout{display:grid;grid-template-columns:1fr .95fr;gap:38px;align-items:center}.cta-panel h2{font-size:34px;line-height:1.3;margin:12px 0}.cta-panel p{color:#c8d9e5}.contact-form{display:grid;grid-template-columns:1fr 1fr;gap:12px}.contact-form label{font-size:13px;color:#d8e5ed}.contact-form input,.contact-form textarea{display:block;width:100%;margin-top:5px;background:rgba(7,20,38,.7);border:1px solid rgba(149,201,231,.32);border-radius:8px;color:var(--white);padding:11px 12px}.contact-form textarea{height:84px;resize:vertical}.contact-form .wide{grid-column:1/-1}.contact-form button{width:100%;border:0}
.site-footer{background:#061120;border-top:1px solid var(--line);padding:60px 0 20px}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:28px}.footer-grid h3{font-size:15px;color:var(--mint);margin:0 0 14px}.footer-grid p{font-size:14px;color:var(--muted);margin:12px 0}.footer-grid a:not(.brand){display:block;color:#bdcfda;font-size:14px;margin:8px 0}.copyright{display:flex;justify-content:space-between;gap:15px;padding-top:28px;margin-top:35px;border-top:1px solid var(--line);color:#879bac;font-size:12px}
@media(max-width:1024px){.tools span{display:none}.process{grid-template-columns:repeat(2,1fr)}.scene-matrix{grid-template-columns:1fr 1fr}.scene:first-child{grid-column:span 2}.footer-grid{grid-template-columns:1.2fr 1fr 1fr}.footer-grid>div:last-child{grid-column:span 3}.split{grid-template-columns:220px 1fr}}
@media(max-width:768px){.nav-toggle{display:block}.mainnav{display:none;height:auto;padding:8px 0 12px;align-items:stretch;gap:0;flex-direction:column}.mainnav.open{display:flex}.mainnav a{height:45px;padding:0 8px}.page-hero{padding:53px 0}.split,.arch-grid,.media-layout,.cta-layout{grid-template-columns:1fr}.channel-nav{position:static}.feature-list{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:last-child{grid-column:auto}.media-layout{gap:26px}}
@media(max-width:520px){.container{width:min(100% - 28px,1180px)}.topbar{height:62px}.brand{font-size:16px}.brand-mark{width:27px;height:27px;margin-right:6px}.header-cta{display:none}.page-hero h1{font-size:34px}.page-hero p{font-size:15px}.section{padding:64px 0}.section-head h2{font-size:28px}.architecture-list,.process,.scene-matrix,.contact-form{grid-template-columns:1fr}.scene:first-child{grid-column:auto}.parameter-panel dl{grid-template-columns:1fr}.parameter-panel dt{padding-bottom:5px}.parameter-panel dd{padding-top:5px}.copyright{flex-direction:column}.footer-grid{grid-template-columns:1fr}.hero-points{gap:8px}.arch-main{padding:22px}.cta-panel{padding:28px 20px}.cta-panel h2{font-size:28px}}

/* roulang page: category3 */
:root{--ink:#071426;--navy:#0b1d35;--panel:#102a47;--panel2:#153858;--cyan:#48d7ee;--mint:#91f4d1;--white:#f4f8fc;--muted:#a9b9c9;--line:rgba(149,201,231,.19);--paper:#edf4f8;--darktext:#10263b;--radius:16px;--shadow:0 18px 55px rgba(0,9,25,.28);--glow:0 0 28px rgba(72,215,238,.22)}
*,:before,:after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ink);color:var(--white);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}
a{color:inherit;text-decoration:none;transition:.25s ease}
a:hover{color:var(--cyan);text-decoration:underline;text-underline-offset:5px;text-decoration-color:var(--cyan)}
img{display:block;width:100%;height:auto}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
.container{width:min(1180px,calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(7,20,38,.92);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.topbar,.mainnav{display:flex;align-items:center}
.topbar{height:68px;justify-content:space-between}
.brand{font-weight:800;font-size:19px;letter-spacing:.02em;white-space:nowrap}
.brand-mark{display:inline-flex;width:30px;height:30px;border:1px solid var(--cyan);border-radius:8px;align-items:center;justify-content:center;color:var(--cyan);margin-right:9px;box-shadow:var(--glow)}
.tools{display:flex;align-items:center;gap:24px;color:var(--muted);font-size:13px}
.header-cta,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:9px;border:1px solid var(--cyan);background:linear-gradient(135deg,#37cce6,#72ead7);color:#062033!important;font-weight:700;box-shadow:var(--glow);text-decoration:none!important}
.header-cta{min-height:38px;padding:0 15px;font-size:13px}
.btn.secondary{background:transparent;color:var(--white)!important;box-shadow:none;border-color:rgba(149,201,231,.4)}
.btn:hover,.header-cta:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(72,215,238,.35)}
.btn:focus,.header-cta:focus,.nav-toggle:focus,input:focus,textarea:focus,.faq-q:focus{outline:3px solid rgba(145,244,209,.65);outline-offset:3px}
.mainnav{height:55px;border-top:1px solid rgba(149,201,231,.08);gap:27px}
.mainnav a{font-size:14px;color:#c7d6e3;height:55px;display:flex;align-items:center;border-bottom:2px solid transparent}
.mainnav a:hover,.mainnav a.active{color:var(--cyan);border-color:var(--cyan);text-decoration:none}
.nav-toggle{display:none;background:none;color:var(--white);border:1px solid var(--line);border-radius:8px;padding:7px 11px;min-height:40px}
.page-top{padding:72px 0 64px;background:radial-gradient(circle at 82% 18%,rgba(38,117,147,.28),transparent 34%),linear-gradient(120deg,#071426,#0c2844)}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:25px}
.breadcrumb a{color:var(--cyan)}
.page-top h1{font-size:clamp(34px,5vw,62px);line-height:1.18;letter-spacing:-.04em;max-width:820px;margin:0 0 20px}
.page-top p{max-width:760px;color:#d2e0ea;font-size:17px;margin:0}
.section{padding:94px 0}
.section.light{background:var(--paper);color:var(--darktext)}
.section-head{max-width:760px;margin-bottom:42px}
.kicker,.tag{display:inline-flex;color:var(--cyan);border:1px solid rgba(72,215,238,.42);background:rgba(16,53,78,.6);padding:4px 10px;border-radius:5px;font-size:12px;letter-spacing:.06em}
.section-head h2{font-size:clamp(27px,3.5vw,43px);line-height:1.25;margin:13px 0}
.section-head p{color:var(--muted);font-size:16px;margin:0}
.light .section-head p{color:#5a6c7c}
.topic-layout{display:grid;grid-template-columns:260px 1fr;gap:42px}
.topic-nav{border-left:1px solid var(--line);padding-left:22px;height:max-content}
.topic-nav a{display:block;color:#c5d7e3;padding:10px 0;border-bottom:1px solid rgba(149,201,231,.1);font-size:14px}
.topic-nav a:first-child{color:var(--cyan);font-weight:700}
.topic-copy{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center}
.topic-copy h3{font-size:29px;line-height:1.3;margin:0 0 15px}
.topic-copy p{color:var(--muted);margin:0}
.glass{background:linear-gradient(145deg,rgba(21,56,88,.85),rgba(9,29,52,.85));border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.image-box{overflow:hidden;position:relative}
.image-box img{aspect-ratio:1.3;object-fit:cover}
.image-caption{position:absolute;left:15px;right:15px;bottom:15px;padding:10px 13px;border-radius:8px;background:rgba(7,20,38,.86);font-size:13px;color:#e6f5fb}
.module-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:17px}
.module-card{padding:27px;min-height:205px;transition:.3s;border-radius:var(--radius);background:linear-gradient(145deg,rgba(21,56,88,.82),rgba(9,29,52,.82));border:1px solid var(--line)}
.module-card:first-child{grid-row:span 2;min-height:430px;background:linear-gradient(145deg,#174467,#0b213b)}
.module-card:hover,.module-card:focus-within{transform:translateY(-5px);border-color:rgba(72,215,238,.65);box-shadow:var(--glow)}
.module-card h3{font-size:21px;margin:15px 0 9px}
.module-card p{font-size:14px;color:var(--muted);margin:0 0 14px}
.module-card ul{margin:0;padding:0;list-style:none;color:#d6e2ea;font-size:14px}
.module-card li{padding:4px 0}
.module-card li:before{content:"—";color:var(--cyan);margin-right:8px}
.module-link{display:inline-block;margin-top:17px;color:var(--mint);font-size:13px}
.split{display:grid;grid-template-columns:.92fr 1.08fr;gap:48px;align-items:center}
.split h2{font-size:clamp(28px,3vw,42px);line-height:1.25;margin:13px 0}
.split p{color:var(--muted)}
.light .split p{color:#5a6c7c}
.architecture{padding:18px;background:#0b2038;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.architecture img{aspect-ratio:1.5;object-fit:cover;border-radius:10px}
.architecture-note{display:flex;justify-content:space-between;gap:12px;padding:15px 3px 0;color:var(--muted);font-size:13px}
.spec-panel{background:#fff;border:1px solid #d5e1e8;border-radius:18px;padding:34px;color:var(--darktext);box-shadow:0 15px 40px rgba(17,49,72,.1)}
.spec-table{width:100%;border-collapse:collapse}
.spec-table td{padding:15px 10px;border-bottom:1px solid #dce6eb;font-size:14px}
.spec-table td:first-child{font-weight:700;width:32%;color:#173d58}
.spec-table td:last-child{color:#587084}
.process{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-top:28px}
.process-step{padding:18px 15px;border-top:3px solid var(--cyan);background:#f2f7f9;border-radius:8px}
.process-step b{display:block;color:#0e5572;font-size:14px}
.process-step span{display:block;color:#627583;font-size:12px;margin-top:6px}
.matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
.matrix-item{padding:23px;border:1px solid var(--line);border-radius:12px;background:rgba(16,42,71,.7)}
.matrix-item strong{display:block;color:var(--mint);font-size:18px;margin-bottom:7px}
.matrix-item span{color:var(--muted);font-size:14px}
.faq{max-width:880px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;min-height:64px;background:none;border:0;color:var(--white);text-align:left;padding:18px 42px 18px 0;font-weight:700;position:relative}
.faq-q:after{content:"+";position:absolute;right:8px;font-size:24px;color:var(--cyan)}
.faq-q[aria-expanded=true]:after{content:"−"}
.faq-a{display:none;color:var(--muted);font-size:14px;padding:0 35px 20px 0}
.faq-a.open{display:block}
.cta-panel{border:1px solid rgba(72,215,238,.5);border-radius:20px;padding:42px;background:radial-gradient(circle at 80% 20%,rgba(55,139,163,.35),transparent 42%),#0e2a47;box-shadow:var(--glow)}
.cta-panel h2{font-size:34px;line-height:1.3;margin:0 0 10px}
.cta-panel>p{color:#c4d7e2;max-width:700px}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px;margin-top:25px}
.field label{display:block;color:#cfe0e8;font-size:13px;margin-bottom:6px}
.field input,.field textarea,.field select{width:100%;background:rgba(4,18,34,.65);border:1px solid rgba(149,201,231,.28);border-radius:8px;color:var(--white);padding:12px 13px;min-height:46px}
.field textarea{min-height:108px;resize:vertical}
.field.full{grid-column:1/-1}
.form-submit{margin-top:18px}
.site-footer{padding:55px 0 22px;background:#06111f;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:30px}
.footer-brand p,.site-footer p{color:var(--muted);font-size:13px}
.site-footer h3{font-size:15px;margin:0 0 13px;color:var(--white)}
.site-footer> .container>div a,.footer-grid>div:not(.footer-brand) a{display:block;color:var(--muted);font-size:13px;padding:3px 0}
.copyright{border-top:1px solid var(--line);margin-top:35px;padding-top:18px;display:flex;justify-content:space-between;color:#778b9b;font-size:12px}
@media(max-width:1024px){.mainnav{gap:16px}.tools span:first-child{display:none}.topic-layout{grid-template-columns:210px 1fr}.module-grid{grid-template-columns:1fr 1fr}.module-card:first-child{grid-row:auto;grid-column:1/-1;min-height:260px}.footer-grid{grid-template-columns:1.4fr 1fr 1fr}}
@media(max-width:640px){.container{width:min(100% - 30px,560px)}.topbar{height:62px}.brand{font-size:16px}.brand-mark{width:27px;height:27px;margin-right:6px}.tools{display:none}.nav-toggle{display:block}.mainnav{display:none;height:auto;position:absolute;left:15px;right:15px;top:62px;background:#0b1d35;border:1px solid var(--line);border-radius:10px;padding:8px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:0}.mainnav.open{display:flex}.mainnav a{height:48px;padding:0 13px;border-bottom:1px solid rgba(149,201,231,.1)}.page-top{padding:48px 0 45px}.page-top h1{font-size:36px}.page-top p{font-size:15px}.section{padding:65px 0}.topic-layout,.topic-copy,.split,.module-grid{grid-template-columns:1fr;gap:25px}.topic-nav{display:grid;grid-template-columns:1fr 1fr;padding-left:15px}.module-card:first-child{grid-column:auto;min-height:0}.matrix{grid-template-columns:1fr}.process{grid-template-columns:1fr 1fr}.process-step:last-child{grid-column:1/-1}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.cta-panel{padding:28px 20px}.cta-panel h2{font-size:27px}.footer-grid{grid-template-columns:1fr 1fr;gap:22px}.footer-brand{grid-column:1/-1}.copyright{display:block}.copyright span{display:block;margin:5px 0}}
@media(max-width:375px){.container{width:calc(100% - 24px)}.brand{font-size:15px}.page-top h1{font-size:32px}.topic-nav{grid-template-columns:1fr}.process{grid-template-columns:1fr}.process-step:last-child{grid-column:auto}.footer-grid{grid-template-columns:1fr}}

/* roulang page: category4 */
:root{--ink:#071426;--navy:#0b1d35;--panel:#102a47;--panel2:#153858;--cyan:#48d7ee;--mint:#91f4d1;--white:#f4f8fc;--muted:#a9b9c9;--line:rgba(149,201,231,.19);--paper:#edf4f8;--darktext:#10263b;--radius:16px;--shadow:0 18px 55px rgba(0,9,25,.28);--glow:0 0 28px rgba(72,215,238,.22)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ink);color:var(--white);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}
a{color:inherit;text-decoration:none;transition:.25s ease}
a:hover{color:var(--cyan);text-decoration:underline;text-decoration-color:var(--cyan);text-underline-offset:5px}
img{display:block;width:100%;height:auto}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(7,20,38,.92);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.topbar{height:68px;display:flex;align-items:center;justify-content:space-between}
.brand{font-weight:800;font-size:19px;letter-spacing:.02em;white-space:nowrap}
.brand-mark{display:inline-flex;width:30px;height:30px;border:1px solid var(--cyan);border-radius:8px;align-items:center;justify-content:center;color:var(--cyan);margin-right:9px;box-shadow:var(--glow)}
.tools{display:flex;align-items:center;gap:24px;color:var(--muted);font-size:13px}
.header-cta,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:9px;border:1px solid var(--cyan);background:linear-gradient(135deg,#37cce6,#72ead7);color:#062033!important;font-weight:700;box-shadow:var(--glow);text-decoration:none!important;transition:.25s ease}
.header-cta{min-height:38px;padding:0 15px;font-size:13px}
.btn.secondary{background:transparent;color:var(--white)!important;box-shadow:none;border-color:rgba(149,201,231,.4)}
.btn:hover,.header-cta:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(72,215,238,.35)}
.btn:focus,.header-cta:focus,.nav-toggle:focus,input:focus,textarea:focus,.faq-q:focus{outline:3px solid rgba(145,244,209,.65);outline-offset:3px}
.mainnav{height:55px;border-top:1px solid rgba(149,201,231,.08);display:flex;align-items:center;gap:27px}
.mainnav a{font-size:14px;color:#c7d6e3;height:55px;display:flex;align-items:center;border-bottom:2px solid transparent}
.mainnav a:hover,.mainnav a.active{color:var(--cyan);border-color:var(--cyan);text-decoration:none}
.nav-toggle{display:none;background:none;color:var(--white);border:1px solid var(--line);border-radius:8px;padding:7px 11px;min-height:40px}
.page-intro{padding:88px 0 78px;background:radial-gradient(circle at 78% 30%,rgba(45,126,159,.25),transparent 35%),linear-gradient(135deg,#081a31,#0c2945)}
.breadcrumb{color:var(--muted);font-size:13px;margin-bottom:26px}
.breadcrumb a{color:var(--cyan)}
.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:end}
.eyebrow,.tag{display:inline-flex;color:var(--cyan);border:1px solid rgba(72,215,238,.42);background:rgba(16,53,78,.6);padding:4px 10px;border-radius:5px;font-size:12px;letter-spacing:.08em}
.page-intro h1{font-size:clamp(36px,5vw,62px);line-height:1.16;letter-spacing:-.045em;margin:18px 0}
.lead{font-size:18px;color:#d0deea;max-width:700px;margin:0}
.intro-panel{border:1px solid var(--line);background:rgba(16,42,71,.72);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow)}
.intro-panel strong{display:block;color:var(--mint);font-size:27px;line-height:1.2;margin-bottom:8px}
.intro-panel span{color:var(--muted);font-size:14px}
.section{padding:100px 0}
.section.light{background:var(--paper);color:var(--darktext)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:clamp(28px,3.5vw,43px);line-height:1.25;margin:12px 0}
.section-head p{color:var(--muted);font-size:16px}
.light .section-head p{color:#5a6c7c}
.guide{display:grid;grid-template-columns:260px 1fr;gap:50px}
.guide-nav{border-left:2px solid rgba(72,215,238,.35);padding-left:22px;display:grid;align-content:start;gap:12px}
.guide-nav a{padding:11px 14px;color:#c9d9e5;border-radius:8px;font-size:14px}
.guide-nav a:hover,.guide-nav a.active{background:rgba(72,215,238,.1);color:var(--cyan);text-decoration:none}
.guide-content{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.feature-card,.flow-card,.scene-card{background:linear-gradient(145deg,rgba(21,56,88,.82),rgba(9,29,52,.82));border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.3s}
.feature-card:hover,.flow-card:hover,.scene-card:hover{transform:translateY(-5px);border-color:rgba(72,215,238,.62);box-shadow:var(--glow)}
.feature-card h3,.flow-card h3,.scene-card h3{margin:12px 0 8px;font-size:20px}
.card-text{color:var(--muted);font-size:14px;margin:0}
.mini-list{padding:0;margin:17px 0 0}
.mini-list li{list-style:none;color:#d3e0e9;padding:5px 0;font-size:14px}
.mini-list li:before{content:"—";color:var(--cyan);margin-right:8px}
.topic-layout{display:grid;grid-template-columns:1fr 1.08fr;gap:62px;align-items:center}
.media-frame{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#0c223d;box-shadow:var(--shadow);position:relative}
.media-frame img{aspect-ratio:1.35;object-fit:cover}
.media-label{position:absolute;left:18px;bottom:18px;background:rgba(7,20,38,.88);border:1px solid var(--line);padding:10px 14px;border-radius:8px;font-size:13px}
.feature-list{display:grid;gap:15px;padding:0;margin:0}
.feature-list li{list-style:none;padding:16px 0 16px 32px;border-bottom:1px solid var(--line);position:relative}
.feature-list li:before{content:"";position:absolute;left:2px;top:27px;width:12px;height:12px;border-radius:50%;background:var(--cyan);box-shadow:0 0 15px var(--cyan)}
.feature-list strong{display:block;font-size:17px}
.feature-list span{display:block;color:var(--muted);font-size:14px}
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;position:relative}
.flow-card{min-height:190px;padding:21px}
.flow-card em{font-style:normal;color:var(--mint);font-size:13px}
.flow-card h3{font-size:17px}
.spec-panel{background:var(--paper);color:var(--darktext);border-radius:20px;padding:42px;box-shadow:var(--shadow)}
.spec-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:45px;align-items:center}
.spec-table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden}
.spec-table th,.spec-table td{text-align:left;padding:14px 16px;border-bottom:1px solid #dbe7ed;font-size:14px}
.spec-table th{width:35%;color:#527084;font-weight:600}
.spec-table td{font-weight:700}
.scene-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:16px}
.scene-card:first-child{grid-row:span 2;min-height:330px;background:linear-gradient(145deg,#174467,#0b213b)}
.scene-card .tag{margin-bottom:18px}
.scene-card h3{font-size:21px}
.dark-band{background:linear-gradient(120deg,#081b32,#103653)}
.cta-panel{border:1px solid rgba(72,215,238,.5);border-radius:20px;padding:48px;background:radial-gradient(circle at 80% 20%,rgba(55,139,163,.35),transparent 42%),#0e2a47;box-shadow:var(--glow)}
.cta-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:50px;align-items:start}
.cta-panel h2{font-size:clamp(28px,3vw,42px);line-height:1.25;margin:12px 0}
.cta-panel p{color:#c6d6e2}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-grid .full{grid-column:1/-1}
label{display:block;color:#c9d9e5;font-size:13px;margin-bottom:6px}
input,textarea,select{width:100%;background:rgba(7,20,38,.68);border:1px solid var(--line);border-radius:8px;color:var(--white);padding:12px 13px;min-height:46px}
textarea{min-height:106px;resize:vertical}
.form-note{font-size:12px;color:var(--muted);margin:12px 0 0}
.faq{max-width:880px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;min-height:64px;background:none;border:0;color:var(--white);text-align:left;padding:18px 42px 18px 0;font-weight:700;position:relative}
.faq-q:after{content:"+";position:absolute;right:8px;font-size:24px;color:var(--cyan)}
.faq-q[aria-expanded=true]:after{content:"−"}
.faq-a{display:none;color:var(--muted);font-size:14px;padding:0 35px 20px 0}
.faq-a.open{display:block}
.site-footer{padding:65px 0 20px;background:#050f1d;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1.1fr;gap:35px}
.footer-brand p,.site-footer p{color:var(--muted);font-size:14px}
.site-footer h3{font-size:15px;color:var(--white);margin:5px 0 16px}
.site-footer a:not(.brand){display:block;color:var(--muted);font-size:13px;margin:9px 0}
.site-footer a:hover{color:var(--cyan)}
.copyright{border-top:1px solid var(--line);margin-top:40px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#718699;font-size:12px}
@media(max-width:1024px){.mainnav{gap:16px}.intro-grid,.topic-layout,.spec-grid{gap:35px}.flow{grid-template-columns:repeat(3,1fr)}.scene-grid{grid-template-columns:1fr 1fr}.scene-card:first-child{grid-row:auto}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.container{width:min(100% - 28px,1180px)}.topbar{height:62px}.tools{display:none}.nav-toggle{display:block}.mainnav{display:none;height:auto;padding:10px 0 15px;flex-direction:column;align-items:stretch;gap:0}.mainnav.open{display:flex}.mainnav a{height:48px;padding:0 12px}.page-intro{padding:58px 0}.intro-grid,.topic-layout,.spec-grid,.cta-grid{grid-template-columns:1fr}.page-intro h1{font-size:39px}.lead{font-size:16px}.section{padding:70px 0}.guide{grid-template-columns:1fr;gap:28px}.guide-content,.scene-grid,.form-grid{grid-template-columns:1fr}.flow{grid-template-columns:1fr}.flow-card{min-height:0}.spec-panel{padding:25px 18px}.spec-table th,.spec-table td{padding:11px 9px;font-size:12px}.cta-panel{padding:29px 21px}.form-grid .full{grid-column:auto}.footer-grid{grid-template-columns:1fr;gap:22px}.copyright{display:block;line-height:2}.copyright span{display:block}}
@media(max-width:375px){.brand{font-size:16px}.brand-mark{width:27px;height:27px;margin-right:5px}.page-intro h1{font-size:34px}.btn{width:100%;padding:0 14px}}