/* roulang page: index */
:root{--ink:#25323a;--muted:#62717a;--brand:#1f6f8b;--brand-dark:#175b72;--teal:#5a9aa8;--mist:#eaf3f6;--paper:#fff;--soft:#f5f7f8;--line:#dce7eb;--amber:#c8873d;--dark:#243239;--radius:16px;--shadow:0 12px 34px rgba(33,62,73,.09);--shadow-hover:0 20px 42px rgba(31,93,116,.16);--container:1240px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fdfefe;font:16px/1.82 "PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input,select,textarea{font:inherit}button{cursor:pointer;border:0}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(31,111,139,.34);outline-offset:3px}.container{width:min(calc(100% - 48px),var(--container));margin:auto}.topbar{height:34px;background:var(--mist);font-size:13px;color:#4d6771}.topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between;gap:18px}.trust{display:flex;gap:18px;white-space:nowrap}.top-contact{display:flex;gap:18px;white-space:nowrap}.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.97);border-bottom:1px solid rgba(220,231,235,.88)}.nav-wrap{height:76px;display:flex;align-items:center;gap:30px}.logo{font-weight:750;font-size:19px;letter-spacing:-.4px;color:var(--ink);line-height:1.25}.logo small{display:block;color:var(--brand);font-size:11px;font-weight:650;letter-spacing:1.4px}.nav{display:flex;align-items:center;justify-content:center;gap:4px;flex:1}.nav a{position:relative;padding:10px 12px;font-size:14px;color:#43565f;border-radius:8px;white-space:nowrap}.nav a:hover,.nav a.active{color:var(--brand);background:#f2f8fa}.nav a.active:after{content:"";position:absolute;height:2px;background:var(--brand);left:14px;right:14px;bottom:4px;border-radius:2px}.btn{min-height:46px;padding:0 20px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:9px;font-weight:650;font-size:15px;transition:.22s transform,.22s background,.22s box-shadow}.btn:hover{transform:translateY(-2px)}.btn:active{transform:translateY(0)}.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(31,111,139,.2)}.btn-primary:hover{background:var(--brand-dark)}.btn-secondary{background:#fff;border:1px solid #a8c9d4;color:var(--brand)}.btn-secondary:hover{background:var(--mist)}.menu-toggle{display:none;background:var(--mist);width:44px;height:44px;border-radius:9px;color:var(--brand);font-size:20px}
main section{padding:105px 0}.section-head{max-width:750px;margin-bottom:42px}.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--brand);font-size:13px;font-weight:700;letter-spacing:.7px}.eyebrow:before{content:"";width:22px;height:2px;background:var(--teal)}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(38px,4vw,56px);line-height:1.22;letter-spacing:-1.4px;margin:18px 0}h2{font-size:clamp(28px,3vw,38px);line-height:1.35;letter-spacing:-.7px;margin:12px 0 15px}h3{font-size:20px;line-height:1.45;margin-bottom:8px}p{color:var(--muted)}.hero{padding:0;min-height:690px;position:relative;overflow:hidden;background:var(--dark);color:#fff}.slides{height:690px;position:relative}.slide{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity .7s ease;display:flex;align-items:center;background-position:center;background-size:cover}.slide.active{opacity:1;visibility:visible}.slide:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(23,42,51,.88) 0%,rgba(27,56,67,.72) 43%,rgba(24,54,64,.22) 78%,rgba(20,39,48,.38))}.slide.one{background-image:url('/assets/images/backpic/back-1.webp')}.slide.two{background-image:url('/assets/images/backpic/back-3.webp')}.slide.three{background-image:url('/assets/images/backpic/back-5.webp')}.hero-content{position:relative;z-index:1;width:min(calc(100% - 48px),var(--container));margin:auto;padding:65px 0 105px}.hero-content h1{max-width:800px}.hero-content p{max-width:745px;font-size:17px;line-height:1.9;color:#e3eef1;margin-bottom:27px}.hero-tag{display:inline-flex;padding:6px 10px;border:1px solid rgba(210,232,237,.45);color:#d9edf1;background:rgba(15,39,48,.32);font-size:13px;border-radius:999px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.hero .btn-secondary{border-color:#bfd7de;background:rgba(255,255,255,.09);color:#fff}.hero .btn-secondary:hover{background:rgba(234,243,246,.2)}.slide-panel{position:absolute;right:max(24px,calc((100vw - var(--container))/2));bottom:72px;z-index:2;width:290px;border-left:2px solid #8ab8c5;padding:13px 0 13px 18px;color:#d8e6e9;font-size:14px;background:linear-gradient(90deg,rgba(26,55,65,.68),transparent)}.slider-control{position:absolute;z-index:3;bottom:28px;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:12px}.slider-control button{width:44px;height:44px;border:1px solid rgba(222,239,242,.48);color:#fff;background:rgba(16,40,49,.46);border-radius:50%;font-size:18px}.slider-control button:hover{background:rgba(234,243,246,.22)}.dots{display:flex;gap:8px}.dot{padding:0!important;width:30px!important;height:4px!important;border-radius:5px!important;border:0!important;background:rgba(255,255,255,.36)!important}.dot.active{background:#e9f6f8!important}
.problem-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:76px;align-items:center}.problem-list{border-left:1px solid var(--line);padding-left:22px}.problem-item{padding:15px 0 15px 16px;border-bottom:1px solid var(--line);position:relative}.problem-item:before{content:"";position:absolute;left:-23px;top:25px;width:7px;height:7px;border-radius:50%;background:var(--amber)}.problem-item strong{display:block;font-size:17px}.architecture{background:var(--soft);padding:28px;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow)}.layer{margin:10px 0;padding:13px 18px;border-radius:9px;font-weight:650;font-size:14px;position:relative}.layer small{font-weight:400;margin-left:10px;color:#5d747d}.layer.cloud{background:#d8edf2;color:#215d71}.layer.app{background:#e8f1f3;color:#2d5664;margin-left:8%}.layer.base{background:#fff;color:#36525d;margin-left:15%;border:1px solid #d6e3e7}.layer.vehicle{background:#31515c;color:#fff;margin-left:23%}.arch-note{display:flex;gap:10px;margin-top:17px;font-size:13px;color:var(--muted)}.arch-note i{font-style:normal;color:var(--brand);font-weight:700}
.advantages{background:var(--soft)}.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.adv-card{background:#fff;padding:24px;border:1px solid var(--line);border-radius:14px;box-shadow:0 5px 17px rgba(37,61,70,.045);transition:.24s}.adv-card:hover{transform:translateY(-5px);border-color:#a9cad5;box-shadow:var(--shadow-hover)}.adv-no{font-size:12px;color:var(--teal);font-weight:800;letter-spacing:1px;border-top:2px solid var(--teal);padding-top:10px}.line-icon{width:38px;height:38px;margin:16px 0;color:var(--brand)}.line-icon svg{width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:1.65}.pill{display:inline-block;padding:3px 8px;background:var(--mist);color:#3e7486;border-radius:5px;font-size:12px;font-weight:650}
.timeline{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:0}.timeline:before{content:"";position:absolute;left:9%;right:9%;top:34px;height:1px;background:#b8d3db}.step{position:relative;padding:0 18px 0 0}.step-num{position:relative;z-index:1;width:68px;height:68px;display:grid;place-items:center;border:1px solid #a9cbd5;border-radius:50%;background:#fff;color:var(--brand);font-weight:800;font-size:19px}.step h3{margin-top:20px;font-size:18px}.step p{font-size:14px;margin-bottom:12px}.io{font-size:12px;color:#52717c;background:#f2f7f8;padding:5px 7px;border-radius:5px}.process-action{margin-top:34px}
.products{background:var(--mist)}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.product{overflow:hidden;background:#fff;border:1px solid #d5e5e9;border-radius:var(--radius);box-shadow:var(--shadow);transition:.24s}.product:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}.product img{width:100%;height:205px;object-fit:cover}.product-body{padding:22px}.product-meta{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:12px}.product .btn{padding:0;min-height:auto;color:var(--brand);font-size:14px}.product .btn:hover{transform:translateX(3px)}
.case-dark{position:relative;background:var(--dark);color:#edf6f7;overflow:hidden}.case-dark:after{content:"";position:absolute;width:800px;height:800px;border:1px solid rgba(129,182,193,.12);border-radius:50%;right:-270px;top:-450px;box-shadow:0 0 0 70px rgba(129,182,193,.035),0 0 0 150px rgba(129,182,193,.025)}.case-layout{position:relative;z-index:1;display:grid;grid-template-columns:.82fr 1.18fr;gap:80px;align-items:center}.case-number{font-size:clamp(84px,11vw,154px);line-height:.85;color:#9cc8d1;font-weight:750;letter-spacing:-6px}.case-left p,.case-dark .section-head p{color:#c4d8dc}.case-label{color:#9cc8d1;font-size:13px;letter-spacing:1px;font-weight:700}.principles{border-top:1px solid rgba(195,224,229,.25)}.principle{display:grid;grid-template-columns:48px 1fr;gap:18px;padding:20px 0;border-bottom:1px solid rgba(195,224,229,.25)}.principle b{color:#9cc8d1;font-size:14px}.principle p{margin:0;color:#c5d5d9;font-size:14px}.case-dark .btn-secondary{margin-top:25px;border-color:#9bbec6;background:transparent;color:#f1fbfc}.case-dark .btn-secondary:hover{background:#dceef1;color:#243239}
.stories-track{display:flex;gap:20px;overflow:auto;padding:3px 3px 16px;scroll-snap-type:x mandatory}.story{min-width:min(370px,88vw);scroll-snap-align:start;border:1px solid var(--line);border-radius:15px;padding:25px;background:#fff;box-shadow:0 7px 20px rgba(35,62,70,.055)}.story:nth-child(even){margin-top:34px;background:#f7fbfc}.role{font-size:13px;color:var(--brand);font-weight:700}.story ul{list-style:none;padding:0;margin:16px 0 0}.story li{padding:8px 0;border-top:1px solid var(--line);font-size:14px;color:#52656d}.story li b{color:var(--ink)}
.metrics{background:#edf5f7}.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid #cbdfe5;border-radius:14px;overflow:hidden;background:#fff}.metric{padding:28px 24px;border-right:1px solid #dbe8eb}.metric:last-child{border:0}.metric b{display:block;font-size:39px;line-height:1.1;color:var(--brand);letter-spacing:-1px}.metric span{font-size:13px;color:#627780}.metric-note{margin-top:18px;display:flex;gap:20px;flex-wrap:wrap;font-size:13px;color:#60747c}.metric-note span:before{content:"— ";color:var(--teal)}
.scenes-layout{display:grid;grid-template-columns:310px 1fr;gap:28px}.scene-tabs{display:flex;flex-direction:column;gap:7px}.scene-tab{background:transparent;text-align:left;padding:15px 17px;border-left:3px solid transparent;color:#52646d;border-radius:0 8px 8px 0}.scene-tab:hover,.scene-tab.active{background:var(--mist);color:var(--brand);border-left-color:var(--brand);font-weight:700}.scene-panel{min-height:295px;border-radius:var(--radius);padding:36px;background:linear-gradient(135deg,#f5fafb,#e2f0f3);border:1px solid #d3e3e7}.scene-panel h3{font-size:25px}.scene-panel p{max-width:640px}.scene-tags{display:flex;gap:9px;flex-wrap:wrap;margin-top:22px}.scene-panel:not(.active){display:none}
.reviews{background:var(--soft)}.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.review{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 7px 21px rgba(35,62,70,.055)}.review-mark{color:var(--amber);letter-spacing:3px;font-size:14px}.review p{font-size:15px;color:#485d66}.reviewer{border-top:1px solid var(--line);padding-top:14px;font-size:13px;color:var(--muted)}.avatar{width:29px;height:29px;display:inline-grid;place-items:center;border-radius:50%;background:var(--mist);color:var(--brand);font-weight:700;margin-right:8px}
.news-layout{display:grid;grid-template-columns:1.12fr .88fr;gap:34px}.news-main{border-top:2px solid var(--brand)}.news-item{padding:20px 0;border-bottom:1px solid var(--line)}.news-item a{display:block}.news-item a:hover h3{color:var(--brand)}.news-item h3{transition:.2s;margin:8px 0 5px}.news-date{font-size:12px;color:#6c8088}.news-side{background:var(--mist);padding:26px;border-radius:14px}.news-side img{height:150px;width:100%;object-fit:cover;border-radius:10px;margin-bottom:16px}.read-link{color:var(--brand);font-size:14px;font-weight:700}
.faq-wrap{max-width:890px;margin:auto}.faq{border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;min-height:63px;padding:16px 48px 16px 0;background:none;text-align:left;color:var(--ink);font-weight:700;position:relative}.faq-q:after{content:"+";position:absolute;right:7px;top:13px;font-size:26px;color:var(--brand);font-weight:400;transition:.25s}.faq-item.open .faq-q:after{transform:rotate(45deg)}.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}.faq-a p{padding:0 40px 18px 0;margin:0;font-size:15px}.faq-item.open .faq-a{max-height:190px}
.contact{padding:100px 0!important;background:linear-gradient(135deg,#e6f3f6,#fff 70%)}.contact-box{display:grid;grid-template-columns:.9fr 1.1fr;gap:54px;align-items:center}.contact-box p{max-width:470px}.contact-form{background:#fff;padding:26px;border:1px solid #d5e5e9;border-radius:15px;box-shadow:var(--shadow)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.field{display:flex;flex-direction:column;gap:5px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:650;color:#49606a}.required{color:#b66531}input,select,textarea{width:100%;border:1px solid #ccdfe4;border-radius:8px;padding:10px 12px;color:var(--ink);background:#fff;transition:.2s}input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,111,139,.12);outline:0}textarea{height:82px;resize:vertical}.form-status{min-height:20px;margin:10px 0 0;font-size:13px;color:var(--brand)}
.footer{background:#202b30;color:#d3e0e2;padding:58px 0 24px}.footer-grid{display:grid;grid-template-columns:1.45fr repeat(3,1fr);gap:38px;padding-bottom:40px;border-bottom:1px solid rgba(217,235,238,.15)}.footer .logo{color:#f2f8f9}.footer .logo small{color:#91c3ce}.footer p{color:#aebfc3;font-size:14px}.footer h3{font-size:15px;color:#f0f6f7}.footer-links{display:flex;flex-direction:column;gap:8px;font-size:14px;color:#b8c9cd}.footer-links a:hover{color:#9ed1dc}.copyright{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;padding-top:19px;font-size:12px;color:#91a7ac}
@media(max-width:1024px){.nav{gap:0}.nav a{padding:10px 8px;font-size:13px}.case-layout,.problem-grid{gap:38px}.product-grid,.review-grid{gap:14px}.slide-panel{display:none}.footer-grid{grid-template-columns:1.4fr 1fr 1fr}.footer-grid>div:last-child{grid-column:2/4}}
@media(max-width:768px){.topbar .trust{display:none}.topbar .container{justify-content:center}.top-contact span:not(:first-child){display:none}.nav{display:none;position:absolute;top:76px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:12px 24px 22px;box-shadow:0 16px 30px rgba(25,52,61,.1)}.nav.open{display:flex;align-items:stretch;flex-direction:column}.nav a{min-height:44px;padding:12px}.nav-cta{display:none}.menu-toggle{display:grid;place-items:center;margin-left:auto}.nav-wrap{height:68px}.slides{height:630px}.hero{min-height:630px}.hero-content{padding:52px 0 104px}.hero-content p{font-size:16px}.problem-grid,.case-layout,.contact-box,.news-layout,.scenes-layout{grid-template-columns:1fr}.architecture{order:-1}.adv-grid{grid-template-columns:repeat(2,1fr)}.timeline{grid-template-columns:1fr;gap:0}.timeline:before{left:34px;top:34px;bottom:34px;right:auto;width:1px;height:auto}.step{padding:0 0 24px 92px;min-height:92px}.step-num{position:absolute;left:0;top:0}.step h3{margin:0}.product-grid,.review-grid{grid-template-columns:1fr}.product{display:grid;grid-template-columns:190px 1fr}.product img{height:100%}.metric-grid{grid-template-columns:1fr 1fr}.metric:nth-child(2){border-right:0}.metric:nth-child(-n+2){border-bottom:1px solid #dbe8eb}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}.footer-grid>div:last-child{grid-column:auto}.contact{padding:70px 0!important}main section{padding:72px 0}}
@media(max-width:520px){.container{width:min(calc(100% - 32px),var(--container))}.topbar{height:32px}.nav-wrap{gap:12px}.logo{font-size:16px}.slides,.hero{height:650px;min-height:650px}.hero-content{padding-top:45px}.hero-content h1{font-size:36px}.hero-actions .btn{width:100%}.slider-control{bottom:18px}.adv-grid{grid-template-columns:1fr}.product{display:block}.product img{height:190px}.metric-grid{grid-template-columns:1fr}.metric{border-right:0;border-bottom:1px solid #dbe8eb}.metric:last-child{border-bottom:0}.scene-tabs{flex-direction:row;overflow:auto;padding-bottom:7px}.scene-tab{white-space:nowrap;border-left:0;border-bottom:3px solid transparent}.scene-tab.active{border-left:0;border-bottom-color:var(--brand)}.scene-panel{padding:25px}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.footer-grid>div:last-child{grid-column:auto}.case-number{font-size:92px}.section-head{margin-bottom:29px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important}.slide{transition:none}}

/* roulang page: category1 */
:root{--ink:#25323a;--muted:#62717a;--brand:#1f6f8b;--brand-dark:#175b72;--teal:#5a9aa8;--mist:#eaf3f6;--paper:#fff;--soft:#f5f7f8;--line:#dce7eb;--amber:#c8873d;--dark:#243239;--radius:16px;--shadow:0 12px 34px rgba(33,62,73,.09);--shadow-hover:0 20px 42px rgba(31,93,116,.16);--container:1240px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fdfefe;font:16px/1.82 "PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input,select,textarea{font:inherit}button{cursor:pointer;border:0}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(31,111,139,.34);outline-offset:3px}.container{width:min(calc(100% - 48px),var(--container));margin:auto}
.topbar{height:34px;background:var(--mist);font-size:13px;color:#4d6771}.topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between;gap:18px}.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.97);border-bottom:1px solid rgba(220,231,235,.88)}.nav-wrap{height:76px;display:flex;align-items:center;gap:30px}.logo{font-weight:750;font-size:19px;letter-spacing:-.4px;color:var(--ink);line-height:1.25;white-space:nowrap}.logo small{display:block;color:var(--brand);font-size:11px;font-weight:650;letter-spacing:1.4px}.nav{display:flex;align-items:center;justify-content:center;gap:4px;flex:1}.nav a{position:relative;padding:10px 12px;font-size:14px;color:#43565f;border-radius:8px;white-space:nowrap}.nav a:hover,.nav a.active{color:var(--brand);background:#f2f8fa}.nav a.active:after{content:"";position:absolute;height:2px;background:var(--brand);left:14px;right:14px;bottom:4px;border-radius:2px}.btn{min-height:46px;padding:0 20px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:9px;font-weight:650;font-size:15px;transition:.22s transform,.22s background,.22s box-shadow}.btn:hover{transform:translateY(-2px)}.btn:active{transform:translateY(0)}.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(31,111,139,.2)}.btn-primary:hover{background:var(--brand-dark)}.btn-secondary{background:#fff;border:1px solid #a8c9d4;color:var(--brand)}.btn-secondary:hover{background:var(--mist)}.menu-toggle{display:none;background:var(--mist);width:44px;height:44px;border-radius:9px;color:var(--brand);font-size:20px}
main section{padding:104px 0}.section-head{max-width:760px;margin-bottom:42px}.section-head h2{font-size:34px;line-height:1.35;letter-spacing:-.5px;margin:10px 0 13px}.section-head p{margin:0;color:var(--muted)}.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--brand);font-size:13px;font-weight:700;letter-spacing:.7px}.eyebrow:before{content:"";width:22px;height:2px;background:var(--teal)}h1,h2,h3,p{margin-top:0}h3{line-height:1.45}.page-hero{padding:0;min-height:338px;position:relative;isolation:isolate;color:#fff;overflow:hidden;background:#243239}.page-hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(24,45,53,.91),rgba(26,55,65,.72),rgba(30,68,78,.4));z-index:-1}.page-hero:after{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;z-index:-2}.hero-inner{padding:48px 0 58px}.crumbs{display:flex;gap:10px;align-items:center;color:#d2e5e9;font-size:13px;margin-bottom:22px}.crumbs span{opacity:.7}.page-hero h1{font-size:46px;line-height:1.24;max-width:820px;margin:0 0 13px;letter-spacing:-1px}.page-hero p{max-width:760px;margin:0;color:#e0edf0;font-size:16px}.hero-rule{width:112px;height:3px;background:#8dc1ce;margin-top:25px}
.overview{display:grid;grid-template-columns:1.02fr .98fr;gap:70px;align-items:center}.architecture{min-height:405px;padding:30px;background:linear-gradient(145deg,#eff7f8,#fff);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);position:relative;overflow:hidden}.architecture:after{content:"";position:absolute;width:170px;height:170px;border:1px solid #bad5dd;border-radius:50%;right:-46px;bottom:-62px}.arch-title{font-size:13px;color:var(--brand);font-weight:700;letter-spacing:.6px;margin-bottom:18px}.arch-layer{position:relative;z-index:1;margin:9px 0;padding:11px 15px;border-radius:9px;border-left:4px solid var(--brand);background:#fff;box-shadow:0 4px 12px rgba(27,76,91,.06);font-size:14px;font-weight:650}.arch-layer small{float:right;color:var(--muted);font-weight:400}.arch-layer:nth-child(3){margin-left:22px;border-left-color:#5a9aa8}.arch-layer:nth-child(4){margin-left:42px;border-left-color:#76aebe}.arch-layer:nth-child(5){margin-left:22px;border-left-color:var(--amber)}.boundary-list{padding:0;margin:25px 0 0;list-style:none}.boundary-list li{padding:15px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:30px 1fr;gap:12px}.boundary-list b{color:var(--brand);font-size:14px}.boundary-list span{color:var(--muted);font-size:15px}
.content-list{background:var(--soft)}.feature-article{display:grid;grid-template-columns:42% 1fr;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);margin-bottom:18px;transition:.25s}.feature-article:hover,.article-row:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#a9cad5}.feature-article img{width:100%;height:100%;min-height:260px;object-fit:cover}.article-copy{padding:30px}.article-copy h3{font-size:25px;margin:12px 0 10px}.article-copy p{color:var(--muted);margin-bottom:18px}.meta{font-size:13px;color:#71848c;display:flex;gap:15px;flex-wrap:wrap}.tag{display:inline-block;padding:3px 9px;border-radius:5px;background:var(--mist);color:#32718a;font-size:12px;font-weight:700}.article-rows{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.article-row{padding:20px;background:#fff;border:1px solid var(--line);border-radius:13px;transition:.25s}.article-row h3{font-size:17px;margin:10px 0 8px}.article-row p{font-size:14px;color:var(--muted);margin-bottom:13px}.more-line{margin-top:28px;text-align:right}.more-line a{font-weight:700;color:var(--brand);border-bottom:1px solid #9bc2ce;padding-bottom:3px}
.topic-matrix{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.topic{padding:25px 22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:220px}.topic-no{font-size:13px;font-weight:800;color:var(--amber);letter-spacing:1px}.topic h3{font-size:19px;margin:18px 0 9px}.topic p{margin:0;color:var(--muted);font-size:14px}.topic:nth-child(even){background:#f8fbfc}
.scenes{background:#edf5f7}.scene-layout{display:grid;grid-template-columns:.82fr 1.18fr;gap:60px;align-items:start}.scene-note{padding:28px;background:var(--dark);color:#fff;border-radius:var(--radius);position:sticky;top:120px}.scene-note p{color:#c9dde1;margin:16px 0 0}.scene-list{display:grid;gap:13px}.scene-item{display:grid;grid-template-columns:62px 1fr;gap:18px;padding:21px;background:#fff;border:1px solid #d7e6e9;border-radius:13px;transition:.25s}.scene-item:hover{transform:translateX(5px);box-shadow:var(--shadow)}.scene-icon{width:50px;height:50px;border-radius:14px;background:var(--mist);color:var(--brand);display:grid;place-items:center;font-size:22px;font-weight:700}.scene-item h3{font-size:18px;margin:0 0 4px}.scene-item p{font-size:14px;color:var(--muted);margin:0}
.direction-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.direction{min-height:145px;padding:22px;border:1px solid var(--line);border-radius:13px;background:#fff;transition:.25s}.direction:hover{border-color:#9bc1cc;box-shadow:var(--shadow);transform:translateY(-4px)}.direction b{display:block;color:var(--brand);font-size:13px;margin-bottom:18px}.direction span{font-weight:700;font-size:17px;line-height:1.4;display:block}.faq-contact{background:linear-gradient(180deg,#fff 0%,#f1f8fa 100%)}.faq-wrap{max-width:920px}.faq{border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;min-height:62px;padding:16px 46px 16px 0;background:none;text-align:left;color:var(--ink);font-weight:700;position:relative}.faq-q:after{content:"+";position:absolute;right:7px;top:11px;font-size:26px;color:var(--brand);font-weight:400;transition:.25s}.faq-item.open .faq-q:after{transform:rotate(45deg)}.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}.faq-a p{padding:0 42px 18px 0;margin:0;color:var(--muted);font-size:15px}.faq-item.open .faq-a{max-height:190px}.consult-strip{margin-top:52px;padding:32px 36px;border-radius:var(--radius);background:var(--dark);display:flex;align-items:center;justify-content:space-between;gap:25px;color:#fff}.consult-strip h2{font-size:25px;margin:0 0 6px}.consult-strip p{margin:0;color:#c6dade}.consult-strip .btn-secondary{border-color:#a7c9d1;background:transparent;color:#f4fbfc}.consult-strip .btn-secondary:hover{background:#e6f2f4;color:var(--dark)}
.footer{background:#202c32;color:#d7e2e4;padding:66px 0 20px}.footer-grid{display:grid;grid-template-columns:1.45fr .85fr .85fr 1.25fr;gap:42px}.footer .logo{color:#fff;display:inline-block}.footer .logo small{color:#8bc2cf}.footer p{font-size:14px;color:#aabdc2;max-width:340px;margin:17px 0 0}.footer h3{font-size:14px;color:#fff;margin:3px 0 16px}.footer-links{display:grid;gap:8px;font-size:14px;color:#b7c8cc}.footer-links a:hover{color:#9bd3df}.copyright{border-top:1px solid rgba(194,217,222,.16);padding-top:20px;margin-top:48px;display:flex;justify-content:space-between;gap:20px;color:#95abb1;font-size:13px}.copyright a:hover{color:#c9e8ed}
@media(max-width:1024px){.nav-wrap{gap:16px}.nav a{padding:10px 8px;font-size:13px}.overview,.scene-layout{gap:38px}.topic-matrix{grid-template-columns:repeat(2,1fr)}.direction-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.container{width:min(calc(100% - 32px),var(--container))}.topbar .container span:first-child{display:none}.topbar .container{justify-content:flex-end}.nav-wrap{height:67px}.menu-toggle{display:grid;place-items:center;margin-left:auto}.nav{display:none;position:absolute;top:101px;left:0;right:0;padding:15px 16px 22px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 16px 28px rgba(35,58,65,.1);align-items:stretch}.nav.open{display:flex;flex-direction:column}.nav a{width:100%;padding:13px 15px;font-size:16px}.nav a.active:after{display:none}.nav-wrap>.btn{display:none}main section{padding:68px 0}.section-head{margin-bottom:30px}.section-head h2{font-size:28px}.page-hero{min-height:290px}.hero-inner{padding:37px 0 42px}.page-hero h1{font-size:34px}.overview,.scene-layout{grid-template-columns:1fr}.architecture{min-height:auto}.feature-article{grid-template-columns:1fr}.feature-article img{height:210px;min-height:0}.article-copy{padding:23px}.article-copy h3{font-size:21px}.article-rows{grid-template-columns:1fr}.scene-note{position:static}.consult-strip{padding:27px;align-items:flex-start;flex-direction:column}.footer-grid{gap:30px}.copyright{flex-direction:column;margin-top:35px}}
@media(max-width:520px){.page-hero h1{font-size:29px}.page-hero p{font-size:14px}.architecture{padding:20px}.arch-layer:nth-child(3),.arch-layer:nth-child(4),.arch-layer:nth-child(5){margin-left:0}.topic-matrix,.direction-grid{grid-template-columns:1fr}.topic{min-height:auto}.scene-item{grid-template-columns:52px 1fr;padding:18px}.footer-grid{grid-template-columns:1fr}.copyright{font-size:12px}.consult-strip h2{font-size:22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

/* roulang page: category2 */
:root{--ink:#25323a;--muted:#62717a;--brand:#1f6f8b;--brand-dark:#175b72;--teal:#5a9aa8;--mist:#eaf3f6;--paper:#fff;--soft:#f5f7f8;--line:#dce7eb;--amber:#c8873d;--dark:#243239;--radius:16px;--shadow:0 12px 34px rgba(33,62,73,.09);--shadow-hover:0 20px 42px rgba(31,93,116,.16);--container:1240px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:#fdfefe;font:16px/1.82 "PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input,select,textarea{font:inherit}
button{cursor:pointer;border:0}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(31,111,139,.34);outline-offset:3px}
.container{width:min(calc(100% - 48px),var(--container));margin:auto}
.topbar{height:34px;background:var(--mist);font-size:13px;color:#4d6771}
.topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between;gap:18px}
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.97);border-bottom:1px solid rgba(220,231,235,.88)}
.nav-wrap{height:76px;display:flex;align-items:center;gap:30px}
.logo{font-weight:750;font-size:19px;letter-spacing:-.4px;color:var(--ink);line-height:1.25}
.logo small{display:block;color:var(--brand);font-size:11px;font-weight:650;letter-spacing:1.4px}
.nav{display:flex;align-items:center;justify-content:center;gap:4px;flex:1}
.nav a{position:relative;padding:10px 12px;font-size:14px;color:#43565f;border-radius:8px;white-space:nowrap}
.nav a:hover,.nav a.active{color:var(--brand);background:#f2f8fa}
.nav a.active:after{content:"";position:absolute;height:2px;background:var(--brand);left:14px;right:14px;bottom:4px;border-radius:2px}
.btn{min-height:46px;padding:0 20px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:9px;font-weight:650;font-size:15px;transition:.22s transform,.22s background,.22s box-shadow}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(31,111,139,.2)}
.btn-primary:hover{background:var(--brand-dark)}
.btn-secondary{background:#fff;border:1px solid #a8c9d4;color:var(--brand)}
.btn-secondary:hover{background:var(--mist)}
.menu-toggle{display:none;background:var(--mist);width:44px;height:44px;border-radius:9px;color:var(--brand);font-size:20px}
main section{padding:104px 0}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(34px,4.2vw,54px);line-height:1.2;letter-spacing:-1.5px;margin-bottom:20px}
h2{font-size:clamp(28px,3vw,38px);line-height:1.3;letter-spacing:-.8px;margin-bottom:14px}
h3{font-size:20px;line-height:1.4;margin-bottom:9px}
.section-head{max-width:760px;margin-bottom:42px}
.section-head p{color:var(--muted);margin-bottom:0}
.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--brand);font-size:13px;font-weight:700;letter-spacing:.7px;margin-bottom:15px}
.eyebrow:before{content:"";width:22px;height:2px;background:var(--teal)}
.page-hero{padding:62px 0 58px;background:linear-gradient(100deg,#f5fafb 0%,#eaf3f6 55%,#f9fcfc 100%);border-bottom:1px solid var(--line)}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:26px}
.breadcrumb a{color:var(--brand)}
.page-hero-grid{display:grid;grid-template-columns:1fr 390px;gap:65px;align-items:center}
.page-hero p{max-width:720px;color:#53656d;font-size:17px;margin-bottom:0}
.theme-strip{height:190px;border-radius:18px;overflow:hidden;position:relative;background:url('/assets/images/backpic/back-6.webp') center/cover}
.theme-strip:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(23,55,66,.84),rgba(31,111,139,.26))}
.theme-code{position:absolute;z-index:1;left:26px;bottom:22px;color:#eaf6f7;font-size:14px;line-height:2}
.overview{background:#fff}
.overview-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:76px;align-items:center}
.boundary-list{list-style:none;padding:0;margin:28px 0 0}
.boundary-list li{display:flex;gap:15px;padding:17px 0;border-bottom:1px solid var(--line)}
.boundary-list b{color:var(--brand);min-width:76px;font-size:14px}
.arch-board{padding:25px;background:var(--soft);border:1px solid var(--line);border-radius:18px}
.arch-layer{padding:18px 20px;margin:10px 0;border:1px solid #c7dce2;border-radius:11px;background:#fff;position:relative}
.arch-layer strong{display:block;font-size:17px}
.arch-layer span{color:var(--muted);font-size:13px}
.arch-layer.cloud{border-left:4px solid var(--teal)}
.arch-layer.mid{border-left:4px solid var(--brand)}
.arch-layer.os{border-left:4px solid var(--amber)}
.arch-layer.app{border-left:4px solid #7dabb4}
.arch-line{height:22px;width:1px;background:#9dbfc7;margin:auto}
.content-section{background:var(--soft)}
.feature-article{display:grid;grid-template-columns:1.05fr .95fr;gap:0;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);margin-bottom:24px}
.feature-article img{width:100%;height:100%;min-height:290px;object-fit:cover}
.article-copy{padding:34px}
.article-copy p{color:var(--muted);margin-bottom:22px}
.article-meta{display:flex;gap:9px;align-items:center;flex-wrap:wrap;color:var(--muted);font-size:13px;margin-bottom:13px}
.list-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.list-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;min-height:214px;transition:.24s}
.list-card:hover{transform:translateY(-5px);border-color:#a9cad5;box-shadow:var(--shadow-hover)}
.list-card .index{color:var(--brand);font-size:13px;font-weight:700}
.list-card p{color:var(--muted);font-size:14px;margin-bottom:15px}
.reading{display:flex;justify-content:space-between;color:#788890;font-size:12px;border-top:1px solid var(--line);padding-top:12px}
.more-row{text-align:center;margin-top:30px}
.matrix{background:#fff}
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.topic{padding:26px 22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:190px}
.topic-no{font-size:13px;color:var(--amber);font-weight:700;margin-bottom:22px}
.topic p{font-size:14px;color:var(--muted)}
.scenes{background:var(--mist)}
.scene-list{display:grid;grid-template-columns:1fr 1.6fr;gap:20px;align-items:stretch}
.scene-index{display:flex;flex-direction:column;gap:8px}
.scene-index button{min-height:58px;text-align:left;padding:0 20px;border-radius:9px;background:#fff;color:#4f626a;border:1px solid transparent;transition:.2s}
.scene-index button:hover,.scene-index button.active{color:var(--brand);border-color:#a7c9d4;background:#fdfefe}
.scene-panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:34px;box-shadow:var(--shadow)}
.scene-panel h3{font-size:26px}
.scene-panel p{color:var(--muted);max-width:680px}
.scene-points{display:flex;gap:10px;flex-wrap:wrap}
.tag{padding:6px 10px;background:var(--mist);color:#376f80;border-radius:6px;font-size:13px}
.related{background:#fff}
.related-links{display:flex;gap:12px;flex-wrap:wrap}
.related-links a{padding:13px 18px;border:1px solid #bfd5db;border-radius:10px;color:var(--brand);background:#fff;transition:.22s}
.related-links a:hover{background:var(--mist);transform:translateY(-3px)}
.faq-wrap{max-width:890px;margin:auto}
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;min-height:63px;padding:16px 48px 16px 0;background:none;text-align:left;color:var(--ink);font-weight:700;position:relative}
.faq-q:after{content:"+";position:absolute;right:7px;top:13px;font-size:26px;color:var(--brand);font-weight:400;transition:.25s}
.faq-item.open .faq-q:after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 40px 18px 0;margin:0;font-size:15px;color:var(--muted)}
.faq-item.open .faq-a{max-height:180px}
.consult{padding-top:20px;background:linear-gradient(135deg,#eaf3f6,#fff)}
.consult-box{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center}
.consult-copy p{color:var(--muted);max-width:520px}
.contact-form{background:#fff;padding:27px;border:1px solid #d5e5e9;border-radius:15px;box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;font-weight:700;color:#536870}
input,select,textarea{width:100%;border:1px solid #ccdfe4;border-radius:8px;padding:10px 12px;color:var(--ink);background:#fff;min-height:44px}
textarea{min-height:94px;resize:vertical}
input::placeholder,textarea::placeholder{color:#9aaab0}
.form-note{font-size:12px;color:var(--muted);margin:13px 0 0}
.form-status{font-size:13px;margin-top:10px;color:var(--brand);min-height:22px}
.footer{padding:62px 0 22px;background:var(--dark);color:#dcebed}
.footer-grid{display:grid;grid-template-columns:1.45fr .8fr .8fr 1.2fr;gap:42px}
.footer .logo{color:#fff;display:inline-block;margin-bottom:17px}
.footer .logo small{color:#9ed0d7}
.footer p{color:#a9c0c5;font-size:14px;max-width:310px}
.footer h3{font-size:15px;color:#fff;margin-bottom:17px}
.footer-links{display:flex;flex-direction:column;gap:8px;color:#a9c0c5;font-size:13px}
.footer-links a:hover{color:#fff}
.copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(214,235,238,.16);margin-top:42px;padding-top:19px;color:#91aeb5;font-size:12px}
.copyright a:hover{color:#fff}
@media(max-width:1024px){.nav-wrap{gap:14px}.nav a{padding:9px 7px}.page-hero-grid,.overview-grid,.consult-box{gap:35px}.topic-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.container{width:min(calc(100% - 32px),var(--container))}.topbar{height:32px}.topbar .container{font-size:12px}.topbar .container span:last-child{display:none}.nav-wrap{height:68px}.menu-toggle{display:block;margin-left:auto}.nav{display:none;position:absolute;top:100px;left:0;right:0;padding:14px 16px 22px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 14px 24px rgba(31,64,75,.1);flex-direction:column;align-items:stretch}.site-header.menu-open .nav{display:flex}.nav a{min-height:44px;display:flex;align-items:center}.nav a.active:after{left:12px;right:auto;width:24px;bottom:5px}.nav-wrap>.btn{display:none}main section{padding:70px 0}.page-hero{padding:38px 0 40px}.page-hero-grid,.overview-grid,.feature-article,.scene-list,.consult-box{grid-template-columns:1fr}.theme-strip{height:160px}.feature-article img{height:220px;min-height:0}.list-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{gap:25px}}
@media(max-width:520px){h1{font-size:35px}.section-head{margin-bottom:28px}.list-grid,.topic-grid,.form-grid{grid-template-columns:1fr}.article-copy{padding:24px}.arch-board{padding:16px}.scene-panel{padding:24px}.copyright{flex-direction:column;gap:5px;margin-top:30px}.footer{padding-top:48px}}
@media(max-width:375px){.container{width:calc(100% - 28px)}.logo{font-size:17px}.topbar .container span:first-child{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}

/* roulang page: category4 */
:root{--ink:#25323a;--muted:#62717a;--brand:#1f6f8b;--brand-dark:#175b72;--teal:#5a9aa8;--mist:#eaf3f6;--paper:#fff;--soft:#f5f7f8;--line:#dce7eb;--amber:#c8873d;--dark:#243239;--radius:16px;--shadow:0 12px 34px rgba(33,62,73,.09);--shadow-hover:0 20px 42px rgba(31,93,116,.16);--container:1240px}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;color:var(--ink);background:#fdfefe;font:16px/1.82 "PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif} a{color:inherit;text-decoration:none} img{display:block;max-width:100%} button,input,select,textarea{font:inherit} button{cursor:pointer;border:0} button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(31,111,139,.34);outline-offset:3px}.container{width:min(calc(100% - 48px),var(--container));margin:auto}
.topbar{height:34px;background:var(--mist);font-size:13px;color:#4d6771}.topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between;gap:18px}.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.97);border-bottom:1px solid rgba(220,231,235,.88)}.nav-wrap{height:76px;display:flex;align-items:center;gap:30px}.logo{font-weight:750;font-size:19px;letter-spacing:-.4px;color:var(--ink);line-height:1.25}.logo small{display:block;color:var(--brand);font-size:11px;font-weight:650;letter-spacing:1.4px}.nav{display:flex;align-items:center;justify-content:center;gap:4px;flex:1}.nav a{position:relative;padding:10px 12px;font-size:14px;color:#43565f;border-radius:8px;white-space:nowrap}.nav a:hover,.nav a.active{color:var(--brand);background:#f2f8fa}.nav a.active:after{content:"";position:absolute;height:2px;background:var(--brand);left:14px;right:14px;bottom:4px;border-radius:2px}.btn{min-height:46px;padding:0 20px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:9px;font-weight:650;font-size:15px;transition:.22s transform,.22s background,.22s box-shadow}.btn:hover{transform:translateY(-2px)}.btn:active{transform:translateY(0)}.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(31,111,139,.2)}.btn-primary:hover{background:var(--brand-dark)}.btn-secondary{background:#fff;border:1px solid #a8c9d4;color:var(--brand)}.btn-secondary:hover{background:var(--mist)}.menu-toggle{display:none;background:var(--mist);width:44px;height:44px;border-radius:9px;color:var(--brand);font-size:20px}
main section{padding:100px 0}.section-head{max-width:760px;margin-bottom:38px}.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--brand);font-size:13px;font-weight:700;letter-spacing:.7px}.eyebrow:before{content:"";width:22px;height:2px;background:var(--teal)}h1,h2,h3,p{margin-top:0}h1{font-size:48px;line-height:1.25;letter-spacing:-1.5px;margin:15px 0 16px}h2{font-size:34px;line-height:1.35;letter-spacing:-.7px;margin:12px 0 14px}h3{font-size:19px;line-height:1.45;margin-bottom:8px}p{color:var(--muted)}.crumb{font-size:13px;color:#6b7e86;margin-bottom:16px}.crumb a:hover{color:var(--brand)}.tag{display:inline-flex;align-items:center;padding:4px 9px;border-radius:6px;background:var(--mist);color:#397187;font-size:12px;font-weight:700}.page-hero{padding:0!important;background:linear-gradient(90deg,#f4f9fa 0%,#fff 52%,#e7f1f4 100%);border-bottom:1px solid var(--line);overflow:hidden}.page-hero .container{min-height:340px;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:40px}.page-hero p{max-width:670px;font-size:16px}.hero-visual{height:255px;position:relative;overflow:hidden;border-radius:18px 18px 0 0}.hero-visual img{height:100%;width:100%;object-fit:cover}.hero-visual:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(31,73,87,.15),rgba(234,243,246,.12))}.visual-label{position:absolute;z-index:1;left:22px;bottom:18px;color:#fff;background:rgba(32,51,58,.82);padding:8px 12px;border-radius:8px;font-size:13px}
.boundary{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}.system-map{border:1px solid var(--line);border-radius:var(--radius);padding:23px;background:linear-gradient(145deg,#fff,#f4f9fa);box-shadow:var(--shadow)}.map-top{display:flex;align-items:center;justify-content:space-between;font-weight:700;margin-bottom:16px}.map-flow{display:grid;gap:9px}.map-layer{padding:13px 15px;border-radius:9px;border:1px solid #d5e4e8;background:#fff;display:flex;justify-content:space-between;align-items:center;font-size:14px}.map-layer strong{color:var(--brand)}.map-layer:nth-child(2){margin-left:18px;background:#eef7f8}.map-layer:nth-child(3){margin-left:36px;background:#e4f0f3}.map-layer:nth-child(4){margin-left:18px;background:#f7f8f8}.boundary-list{list-style:none;padding:0;margin:24px 0 0}.boundary-list li{position:relative;padding:14px 0 14px 27px;border-bottom:1px solid var(--line);color:#4e626b}.boundary-list li:before{content:"";position:absolute;left:2px;top:23px;width:9px;height:9px;border:2px solid var(--teal);border-radius:50%}
.content-section{background:var(--soft)}.feature-article{display:grid;grid-template-columns:40% 60%;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);margin-bottom:18px}.feature-article img{height:285px;width:100%;object-fit:cover}.feature-copy{padding:31px}.meta{font-size:13px;color:#71828a;display:flex;gap:13px;flex-wrap:wrap;margin:12px 0}.read-link{font-size:14px;font-weight:700;color:var(--brand);display:inline-flex;align-items:center;gap:6px}.read-link:hover{color:var(--brand-dark);transform:translateX(3px)}.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.article-row{display:grid;grid-template-columns:108px 1fr;gap:16px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;transition:.24s}.article-row:hover{transform:translateY(-4px);border-color:#a9cad5;box-shadow:var(--shadow-hover)}.article-row img{height:92px;width:108px;object-fit:cover;border-radius:8px}.article-row h3{font-size:16px;margin:5px 0}.article-row p{font-size:13px;line-height:1.7;margin:0}.more-line{text-align:center;margin-top:28px}
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.topic{min-height:234px;padding:26px;border-right:1px solid var(--line);background:#fff}.topic:last-child{border:0}.topic-no{font-size:13px;color:var(--amber);font-weight:800;letter-spacing:1px}.topic p{font-size:14px;margin-bottom:0}.topic:nth-child(even){background:#f7fafb}
.scene-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:65px;align-items:start}.scene-quote{padding:32px;border-radius:var(--radius);background:var(--dark);color:#fff}.scene-quote h2{color:#fff}.scene-quote p{color:#c6d7db}.scene-list{display:grid;gap:13px}.scene-item{display:grid;grid-template-columns:58px 1fr;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}.scene-icon{width:48px;height:48px;border-radius:12px;background:var(--mist);color:var(--brand);display:grid;place-items:center;font-size:21px;font-weight:700}.scene-item p{font-size:14px;margin:0}
.direction-section{background:#edf5f7}.direction-links{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.direction-link{display:flex;align-items:center;justify-content:space-between;min-height:92px;padding:18px;border-radius:12px;border:1px solid #cfe0e5;background:#fff;font-weight:700;color:#405860;transition:.22s}.direction-link:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--shadow);transform:translateY(-3px)}.direction-link b{font-size:20px;font-weight:400}
.faq-cta{padding-bottom:108px!important}.faq-wrap{max-width:920px;margin:auto}.faq{border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;min-height:63px;padding:16px 48px 16px 0;background:none;text-align:left;color:var(--ink);font-weight:700;position:relative}.faq-q:after{content:"+";position:absolute;right:7px;top:13px;font-size:26px;color:var(--brand);font-weight:400;transition:.25s}.faq-item.open .faq-q:after{transform:rotate(45deg)}.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}.faq-a p{padding:0 40px 18px 0;margin:0;font-size:15px}.faq-item.open .faq-a{max-height:180px}.consult-strip{margin-top:55px;padding:31px 34px;border-radius:16px;background:linear-gradient(100deg,#e4f1f4,#fff);border:1px solid #cfe2e7;display:flex;justify-content:space-between;align-items:center;gap:30px}.consult-strip h3{margin:0 0 4px;font-size:22px}.consult-strip p{margin:0;font-size:14px}
.footer{background:#25323a;color:#d5e2e5;padding:68px 0 22px}.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr 1.15fr;gap:42px}.footer .logo{color:#fff;display:inline-block;margin-bottom:13px}.footer p{color:#aebfc4;font-size:14px;max-width:350px}.footer h3{color:#f3fafb;font-size:15px;margin-bottom:15px}.footer-links{display:grid;gap:8px;font-size:14px;color:#b9cbd0}.footer-links a:hover{color:#fff}.copyright{border-top:1px solid rgba(202,222,226,.18);margin-top:44px;padding-top:19px;display:flex;justify-content:space-between;gap:20px;font-size:13px;color:#a8bdc3}.copyright a:hover{color:#fff}
@media(max-width:1024px){.nav-wrap{gap:15px}.nav a{padding:10px 8px}.page-hero .container,.boundary,.scene-layout{gap:38px}.topic{padding:19px}.footer-grid{gap:25px}.direction-links{grid-template-columns:repeat(2,1fr)}}@media(max-width:768px){.topbar .container span:first-child{display:none}.topbar .container{justify-content:center}.nav-wrap{height:68px;justify-content:space-between}.menu-toggle{display:block}.nav{display:none;position:absolute;left:0;right:0;top:68px;background:#fff;padding:13px 24px 21px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);align-items:stretch}.nav.open{display:flex;flex-direction:column}.nav a{min-height:44px;width:100%;display:flex;align-items:center}.nav-wrap>.btn{display:none}.page-hero .container{min-height:auto;padding:47px 0 0;grid-template-columns:1fr}.hero-visual{height:190px}.page-hero h1{font-size:37px}.boundary,.scene-layout{grid-template-columns:1fr}.feature-article{grid-template-columns:1fr}.feature-article img{height:210px}.article-list{grid-template-columns:1fr}.topic-grid{grid-template-columns:repeat(2,1fr)}.topic:nth-child(2){border-right:0}.topic:nth-child(-n+2){border-bottom:1px solid var(--line)}.footer-grid{grid-template-columns:1fr 1fr}.consult-strip{align-items:flex-start;flex-direction:column}main section{padding:68px 0}}@media(max-width:520px){.container{width:min(calc(100% - 32px),var(--container))}h1{font-size:32px}h2{font-size:27px}.page-hero .container{padding-top:35px}.page-hero p{font-size:15px}.feature-copy{padding:22px}.article-row{grid-template-columns:84px 1fr;gap:12px}.article-row img{width:84px;height:82px}.article-row p{display:none}.topic-grid,.direction-links,.footer-grid{grid-template-columns:1fr}.topic{border-right:0!important;border-bottom:1px solid var(--line)}.topic:last-child{border-bottom:0}.direction-link{min-height:72px}.consult-strip{padding:25px}.copyright{display:block}.copyright span{display:block;margin-bottom:7px}.map-layer:nth-child(2),.map-layer:nth-child(4){margin-left:8px}.map-layer:nth-child(3){margin-left:16px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

/* roulang page: category3 */
:root{--ink:#25323a;--muted:#62717a;--brand:#1f6f8b;--brand-dark:#175b72;--teal:#5a9aa8;--mist:#eaf3f6;--paper:#fff;--soft:#f5f7f8;--line:#dce7eb;--amber:#c8873d;--dark:#243239;--radius:16px;--shadow:0 12px 34px rgba(33,62,73,.09);--shadow-hover:0 20px 42px rgba(31,93,116,.16);--container:1240px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fdfefe;font:16px/1.82 "PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input,select,textarea{font:inherit}button{cursor:pointer;border:0}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(31,111,139,.34);outline-offset:3px}.container{width:min(calc(100% - 48px),var(--container));margin:auto}
.topbar{height:34px;background:var(--mist);font-size:13px;color:#4d6771}.topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between;gap:18px}.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.97);border-bottom:1px solid rgba(220,231,235,.88)}.nav-wrap{height:76px;display:flex;align-items:center;gap:30px}.logo{font-weight:750;font-size:19px;letter-spacing:-.4px;color:var(--ink);line-height:1.25;white-space:nowrap}.logo small{display:block;color:var(--brand);font-size:11px;font-weight:650;letter-spacing:1.4px}.nav{display:flex;align-items:center;justify-content:center;gap:4px;flex:1}.nav a{position:relative;padding:10px 12px;font-size:14px;color:#43565f;border-radius:8px;white-space:nowrap}.nav a:hover,.nav a.active{color:var(--brand);background:#f2f8fa}.nav a.active:after{content:"";position:absolute;height:2px;background:var(--brand);left:14px;right:14px;bottom:4px;border-radius:2px}.btn{min-height:46px;padding:0 20px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:9px;font-weight:650;font-size:15px;transition:.22s transform,.22s background,.22s box-shadow}.btn:hover{transform:translateY(-2px)}.btn:active{transform:translateY(0)}.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(31,111,139,.2)}.btn-primary:hover{background:var(--brand-dark)}.btn-secondary{background:#fff;border:1px solid #a8c9d4;color:var(--brand)}.btn-secondary:hover{background:var(--mist)}.menu-toggle{display:none;background:var(--mist);width:44px;height:44px;border-radius:9px;color:var(--brand);font-size:20px}
main section{padding:100px 0}.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--brand);font-size:13px;font-weight:700;letter-spacing:.7px}.eyebrow:before{content:"";width:22px;height:2px;background:var(--teal)}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(36px,4.5vw,56px);line-height:1.2;letter-spacing:-1.5px;margin:18px 0}h2{font-size:clamp(28px,3vw,38px);line-height:1.3;letter-spacing:-.8px;margin:14px 0}h3{font-size:20px;line-height:1.4;margin:0 0 10px}.muted{color:var(--muted)}.section-head{max-width:760px;margin-bottom:42px}.pill{display:inline-block;padding:3px 9px;background:var(--mist);color:#3e7486;border-radius:5px;font-size:12px;font-weight:650}
.category-hero{min-height:340px;padding:45px 0 55px;background:#f3f8f9;border-bottom:1px solid var(--line);position:relative;overflow:hidden}.category-hero:after{content:"";position:absolute;width:420px;height:420px;border:1px solid #c8e0e5;border-radius:50%;right:7%;top:-220px;box-shadow:0 0 0 35px rgba(234,243,246,.7),0 0 0 70px rgba(234,243,246,.45)}.crumb{font-size:13px;color:var(--muted);position:relative;z-index:1}.crumb a{color:var(--brand)}.hero-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:70px;align-items:end;position:relative;z-index:1}.category-hero p{max-width:680px;color:#53666e;font-size:17px;margin-bottom:0}.hero-panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:var(--shadow)}.panel-line{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding:11px 0;font-size:14px}.panel-line:last-child{border-bottom:0}.panel-line b{color:var(--brand);font-weight:700}.panel-mark{display:inline-flex;width:38px;height:38px;border-radius:10px;background:var(--mist);color:var(--brand);align-items:center;justify-content:center;font-size:20px;margin-right:10px}
.split{display:grid;grid-template-columns:.85fr 1.15fr;gap:85px;align-items:center}.boundary{padding:28px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}.layer{display:flex;align-items:center;gap:16px;padding:16px 18px;margin:8px 0;border-left:4px solid var(--brand);background:#f7fbfc;border-radius:8px}.layer:nth-child(2){margin-left:30px;border-left-color:var(--teal)}.layer:nth-child(3){margin-left:60px;border-left-color:var(--amber)}.layer:nth-child(4){margin-left:90px;border-left-color:#8db8c0}.layer strong{display:block}.layer small{color:var(--muted)}
.content-section{background:var(--soft)}.feature-story{display:grid;grid-template-columns:1fr 1.1fr;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);margin-bottom:22px}.feature-story img{width:100%;height:100%;min-height:245px;object-fit:cover}.feature-body{padding:32px}.feature-body p{color:var(--muted);margin:12px 0 20px}.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.article-card{display:grid;grid-template-columns:128px 1fr;gap:18px;background:#fff;border:1px solid var(--line);padding:15px;border-radius:13px;transition:.24s}.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#a9cad5}.article-card img{width:128px;height:105px;object-fit:cover;border-radius:9px}.article-card h3{font-size:17px;margin:7px 0}.article-card p{font-size:14px;color:var(--muted);line-height:1.65;margin:0}.meta{font-size:12px;color:#78909a}
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.topic{border-top:3px solid var(--brand);padding:22px 4px 8px}.topic:nth-child(2){border-color:var(--teal)}.topic:nth-child(3){border-color:var(--amber)}.topic:nth-child(4){border-color:#8aaeb6}.topic b{font-size:28px;color:#bdd6dc;display:block;margin-bottom:12px}.topic p{font-size:14px;color:var(--muted);margin:0}
.scene-section{background:#f8fbfb}.scene-grid{display:grid;grid-template-columns:250px 1fr;gap:40px}.scene-nav{border-right:1px solid var(--line)}.scene-btn{display:block;width:100%;min-height:52px;padding:12px 18px;background:none;text-align:left;border-radius:8px;color:var(--muted);font-weight:650}.scene-btn:hover,.scene-btn.active{background:var(--mist);color:var(--brand)}.scene-panel{display:none;grid-template-columns:170px 1fr;gap:28px;align-items:center}.scene-panel.active{display:grid}.scene-panel img{width:170px;height:140px;object-fit:cover;border-radius:12px}.scene-panel p{color:var(--muted);margin-bottom:0}
.related{padding:70px 0;background:#fff}.related-row{display:flex;gap:12px;flex-wrap:wrap}.related a{padding:13px 18px;border:1px solid var(--line);border-radius:9px;color:var(--brand);background:#fbfdfd;transition:.2s}.related a:hover{background:var(--mist);border-color:#a8c9d4;transform:translateY(-2px)}
.faq-wrap{max-width:900px}.faq{border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;min-height:63px;padding:16px 48px 16px 0;background:none;text-align:left;color:var(--ink);font-weight:700;position:relative}.faq-q:after{content:"+";position:absolute;right:7px;top:13px;font-size:26px;color:var(--brand);font-weight:400;transition:.25s}.faq-item.open .faq-q:after{transform:rotate(45deg)}.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}.faq-a p{padding:0 40px 18px 0;margin:0;font-size:15px;color:var(--muted)}.faq-item.open .faq-a{max-height:180px}.cta{margin-top:65px;background:var(--mist);border-radius:18px;padding:30px 34px;display:flex;justify-content:space-between;align-items:center;gap:25px}.cta p{color:var(--muted);margin:6px 0 0}
.footer{background:var(--dark);color:#e5f0f2;padding:66px 0 22px}.footer-grid{display:grid;grid-template-columns:1.5fr .8fr .8fr 1.2fr;gap:42px}.footer .logo{color:#fff}.footer .logo small{color:#9bc8d0}.footer p{color:#aebfc3;max-width:310px;font-size:14px}.footer h3{font-size:15px;color:#fff}.footer-links{display:flex;flex-direction:column;gap:8px;color:#aec0c5;font-size:14px}.footer-links a:hover{color:#fff}.copyright{border-top:1px solid rgba(220,239,242,.16);margin-top:42px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#8fa5aa;font-size:12px}.copyright a:hover{color:#fff}
@media(max-width:1024px){.nav-wrap{gap:14px}.nav a{padding:10px 7px;font-size:13px}.split{gap:35px}.topic-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.container{width:min(calc(100% - 32px),var(--container))}.topbar{height:32px}.topbar .container span:last-child{display:none}.nav-wrap{height:68px}.menu-toggle{display:block}.nav{display:none;position:absolute;left:0;right:0;top:100px;background:#fff;border-bottom:1px solid var(--line);padding:12px 16px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav.open{display:flex}.nav a{min-height:44px;padding:11px 15px}.nav a.active:after{display:none}.nav-wrap>.btn{display:none}.hero-layout,.split{grid-template-columns:1fr;gap:28px}.category-hero{min-height:auto;padding-bottom:42px}.category-hero:after{right:-180px}.hero-panel{max-width:520px}.category-hero h1{font-size:38px}main section{padding:70px 0}.feature-story{grid-template-columns:1fr}.feature-story img{height:210px}.article-list{grid-template-columns:1fr}.scene-grid{grid-template-columns:1fr;gap:20px}.scene-nav{display:flex;overflow:auto;border-right:0;border-bottom:1px solid var(--line);gap:5px}.scene-btn{white-space:nowrap;width:auto}.scene-panel.active{grid-template-columns:120px 1fr}.scene-panel img{width:120px;height:110px}.cta{align-items:flex-start;flex-direction:column}.copyright{flex-direction:column;gap:7px}}
@media(max-width:480px){h2{font-size:28px}.logo{font-size:16px}.topic-grid{grid-template-columns:1fr}.scene-panel.active{grid-template-columns:1fr}.scene-panel img{width:100%;height:155px}.footer-grid{grid-template-columns:1fr;gap:28px}.copyright{font-size:11px}.article-card{grid-template-columns:100px 1fr;gap:12px}.article-card img{width:100px;height:92px}.article-card p{display:none}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}

/* roulang page: category5 */
:root{--ink:#25323a;--muted:#62717a;--brand:#1f6f8b;--brand-dark:#175b72;--teal:#5a9aa8;--mist:#eaf3f6;--paper:#fff;--soft:#f5f7f8;--line:#dce7eb;--amber:#c8873d;--dark:#243239;--radius:16px;--shadow:0 12px 34px rgba(33,62,73,.09);--shadow-hover:0 20px 42px rgba(31,93,116,.16);--container:1240px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fdfefe;font:16px/1.82 "PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input,select,textarea{font:inherit}button{cursor:pointer;border:0}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(31,111,139,.34);outline-offset:3px}.container{width:min(calc(100% - 48px),var(--container));margin:auto}
.topbar{height:34px;background:var(--mist);font-size:13px;color:#4d6771}.topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between;gap:18px}.topbar-right{display:flex;gap:18px;white-space:nowrap}.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.97);border-bottom:1px solid rgba(220,231,235,.88)}.nav-wrap{height:76px;display:flex;align-items:center;gap:30px}.logo{font-weight:750;font-size:19px;letter-spacing:-.4px;color:var(--ink);line-height:1.25;flex-shrink:0}.logo small{display:block;color:var(--brand);font-size:11px;font-weight:650;letter-spacing:1.4px}.nav{display:flex;align-items:center;justify-content:center;gap:4px;flex:1}.nav a{position:relative;padding:10px 12px;font-size:14px;color:#43565f;border-radius:8px;white-space:nowrap}.nav a:hover,.nav a.active{color:var(--brand);background:#f2f8fa}.nav a.active:after{content:"";position:absolute;height:2px;background:var(--brand);left:14px;right:14px;bottom:4px;border-radius:2px}.btn{min-height:46px;padding:0 20px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:9px;font-weight:650;font-size:15px;transition:.22s transform,.22s background,.22s box-shadow}.btn:hover{transform:translateY(-2px)}.btn:active{transform:translateY(0)}.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(31,111,139,.2)}.btn-primary:hover{background:var(--brand-dark)}.btn-secondary{background:#fff;border:1px solid #a8c9d4;color:var(--brand)}.btn-secondary:hover{background:var(--mist)}.menu-toggle{display:none;background:var(--mist);width:44px;height:44px;border-radius:9px;color:var(--brand);font-size:20px}
main section{padding:104px 0}.section-head{max-width:780px;margin-bottom:42px}.section-head h2{font-size:34px;line-height:1.35;margin:10px 0 12px;letter-spacing:-.7px}.section-head p{margin:0;color:var(--muted)}.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--brand);font-size:13px;font-weight:700;letter-spacing:.7px}.eyebrow:before{content:"";width:22px;height:2px;background:var(--teal)}.pill{display:inline-block;padding:3px 8px;background:var(--mist);color:#3e7486;border-radius:5px;font-size:12px;font-weight:650}.menu-toggle span{display:block;line-height:1}
.category-hero{padding:0;min-height:334px;position:relative;overflow:hidden;color:#fff;background:#263b43}.category-hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(25,48,57,.94) 0%,rgba(31,67,80,.79) 48%,rgba(34,64,73,.34) 100%),url('/assets/images/backpic/back-5.webp') center/cover}.category-hero .container{position:relative;padding:45px 0 55px}.breadcrumb{display:flex;gap:9px;align-items:center;font-size:13px;color:#cfe1e5;margin-bottom:21px}.breadcrumb span{opacity:.72}.category-hero h1{max-width:820px;margin:0 0 13px;font-size:46px;line-height:1.24;letter-spacing:-1px}.category-hero p{max-width:760px;margin:0;color:#e0edf0;font-size:16px}.theme-line{display:flex;gap:8px;margin-top:28px}.theme-line i{display:block;height:4px;border-radius:9px;background:#7fb7c4}.theme-line i:nth-child(1){width:108px}.theme-line i:nth-child(2){width:52px;background:#d4b078}.theme-line i:nth-child(3){width:168px;background:#b8dce2}
.boundary{background:var(--soft)}.boundary-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:64px;align-items:center}.module-map{min-height:330px;padding:28px;display:grid;grid-template-columns:repeat(2,1fr);gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);position:relative}.module-map:before{content:"";position:absolute;left:50%;top:47px;bottom:47px;border-left:1px dashed #9fc6d0}.module{padding:20px;border:1px solid #d9e8ec;border-radius:12px;background:#fbfefe;position:relative}.module:nth-child(2),.module:nth-child(3){background:var(--mist)}.module b{display:block;font-size:17px;margin-bottom:6px}.module span{font-size:13px;line-height:1.65;color:var(--muted)}.boundary-copy h2{font-size:34px;line-height:1.36;margin:8px 0 18px}.boundary-copy>p{color:var(--muted);margin:0 0 20px}.check-list{list-style:none;padding:0;margin:0}.check-list li{position:relative;padding:14px 0 14px 29px;border-top:1px solid var(--line)}.check-list li:before{content:"";position:absolute;left:0;top:19px;width:14px;height:14px;border:2px solid var(--teal);border-radius:50%}.check-list strong{display:block;font-size:15px}.check-list span{display:block;font-size:14px;color:var(--muted)}
.content-layout{display:grid;grid-template-columns:1.13fr .87fr;gap:24px}.feature-story{min-height:100%;display:grid;grid-template-columns:.92fr 1.08fr;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.24s}.feature-story:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}.feature-story img{height:100%;min-height:340px;width:100%;object-fit:cover}.feature-body{padding:30px}.meta{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;flex-wrap:wrap}.feature-body h3{font-size:25px;line-height:1.45;margin:15px 0 12px}.feature-body p{color:var(--muted);margin:0 0 18px}.text-link{color:var(--brand);font-size:14px;font-weight:700}.text-link:hover{color:var(--brand-dark);text-decoration:underline;text-underline-offset:4px}.article-list{border-top:2px solid var(--brand)}.article{display:grid;grid-template-columns:84px 1fr;gap:15px;padding:17px 0;border-bottom:1px solid var(--line);transition:.2s}.article:hover{padding-left:7px;background:#fbfefe}.article img{width:84px;height:66px;object-fit:cover;border-radius:8px}.article h3{font-size:16px;line-height:1.5;margin:3px 0 3px}.article p{font-size:13px;line-height:1.65;color:var(--muted);margin:0}.more-line{margin-top:21px}
.topics{background:#eef6f8}.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid #cce0e5;border-radius:var(--radius);overflow:hidden;background:#fff}.topic{padding:25px 22px;border-right:1px solid #dbe8eb;min-height:230px}.topic:last-child{border-right:0}.topic-no{display:block;color:var(--amber);font-size:13px;font-weight:800;letter-spacing:1px}.topic h3{font-size:19px;line-height:1.45;margin:20px 0 10px}.topic p{font-size:14px;color:var(--muted);margin:0}.scene-stream{display:grid;grid-template-columns:1fr 1fr;gap:18px 42px}.scene-item{display:grid;grid-template-columns:52px 1fr;gap:17px;align-items:start;padding:20px 0;border-top:1px solid var(--line)}.scene-icon{width:48px;height:48px;display:grid;place-items:center;border-radius:13px;background:var(--mist);color:var(--brand);font-size:22px;font-weight:700}.scene-item h3{font-size:18px;margin:0 0 5px}.scene-item p{font-size:14px;color:var(--muted);margin:0}
.related{background:var(--soft)}.related-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.related-card{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:19px;border:1px solid var(--line);border-radius:12px;background:#fff;transition:.22s}.related-card:hover{transform:translateY(-4px);border-color:#9ec3ce;box-shadow:var(--shadow)}.related-card b{font-size:15px}.related-card span{color:var(--brand);font-size:19px}.faq-contact{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:start}.faq{border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;min-height:63px;padding:16px 44px 16px 0;background:none;text-align:left;color:var(--ink);font-weight:700;position:relative}.faq-q:after{content:"+";position:absolute;right:7px;top:13px;font-size:26px;color:var(--brand);font-weight:400;transition:.25s}.faq-item.open .faq-q:after{transform:rotate(45deg)}.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}.faq-a p{padding:0 35px 18px 0;margin:0;font-size:14px;color:var(--muted)}.faq-item.open .faq-a{max-height:180px}.consult-box{padding:33px;background:linear-gradient(145deg,#e8f3f5,#fff 74%);border:1px solid #d4e7eb;border-radius:var(--radius)}.consult-box h2{font-size:28px;line-height:1.4;margin:0 0 12px}.consult-box p{color:var(--muted);margin:0 0 20px}.contact-form{display:grid;gap:12px}.contact-form label{font-size:13px;font-weight:700;color:#48616a}.contact-form input,.contact-form select,.contact-form textarea{width:100%;margin-top:5px;border:1px solid #ccdfe4;border-radius:8px;padding:10px 12px;color:var(--ink);background:#fff;transition:.2s}.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,111,139,.1);outline:0}.contact-form textarea{min-height:82px;resize:vertical}.form-note{font-size:12px;color:var(--muted);margin:0}.form-feedback{display:none;padding:9px 12px;border-radius:8px;background:#e8f4ee;color:#286546;font-size:13px}
.footer{background:#243239;color:#d2e0e3;padding:66px 0 22px}.footer-grid{display:grid;grid-template-columns:1.5fr .8fr .8fr 1.3fr;gap:40px}.footer .logo{color:#fff;display:inline-block;margin-bottom:15px}.footer .logo small{color:#91c6d2}.footer p{max-width:360px;font-size:14px;line-height:1.75;color:#abc0c5;margin:0}.footer h3{font-size:15px;color:#fff;margin:3px 0 14px}.footer-links{display:grid;gap:9px;font-size:14px;color:#b9cbd0}.footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}.copyright{margin-top:47px;padding-top:18px;border-top:1px solid rgba(190,216,220,.19);display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;color:#9bb2b7;font-size:13px}.copyright a:hover{color:#fff}
@media(max-width:1024px){.nav-wrap{gap:15px}.nav a{padding:10px 8px}.boundary-grid,.faq-contact{gap:35px}.content-layout{grid-template-columns:1fr}.feature-story img{min-height:290px}.topic-grid{grid-template-columns:repeat(2,1fr)}.topic:nth-child(2){border-right:0}.topic:nth-child(-n+2){border-bottom:1px solid #dbe8eb}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}}
@media(max-width:768px){.container{width:min(calc(100% - 32px),var(--container))}.topbar .container{justify-content:center}.topbar-left{display:none}.topbar-right span:not(:first-child){display:none}.nav-wrap{height:68px;justify-content:space-between}.menu-toggle{display:block;position:relative;z-index:4}.nav{position:absolute;left:0;right:0;top:68px;padding:14px 16px 20px;display:none;flex-direction:column;align-items:stretch;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 16px 24px rgba(37,50,58,.1)}.nav.open{display:flex}.nav a{min-height:44px;padding:11px 14px}.nav a.active:after{display:none}.nav-wrap>.btn{display:none}.category-hero{min-height:305px}.category-hero .container{padding:36px 0 45px}.category-hero h1{font-size:35px}.category-hero p{font-size:15px}.section-head h2,.boundary-copy h2{font-size:29px}main section{padding:68px 0}.boundary-grid,.faq-contact{grid-template-columns:1fr}.module-map{min-height:300px}.scene-stream{grid-template-columns:1fr;gap:0}.footer-grid{grid-template-columns:1fr 1fr;gap:32px}.feature-story{grid-template-columns:1fr}.feature-story img{height:220px;min-height:0}.feature-body{padding:24px}}
@media(max-width:520px){.category-hero h1{font-size:29px}.theme-line i:nth-child(3){width:85px}.module-map{padding:14px;gap:10px}.module{padding:15px}.module b{font-size:15px}.module span{font-size:12px}.feature-body h3{font-size:22px}.article{grid-template-columns:72px 1fr}.article img{width:72px;height:61px}.topic-grid,.related-row{grid-template-columns:1fr}.topic{border-right:0;border-bottom:1px solid #dbe8eb}.topic:nth-child(2){border-right:0}.topic:last-child{border-bottom:0}.related-card{min-height:65px}.footer-grid{grid-template-columns:1fr}.copyright{margin-top:34px}.section-head{margin-bottom:29px}.consult-box{padding:25px 20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}