/* roulang page: index */
:root{
  --paper:#f5f3ee;--panel:#fffefa;--ink:#20211f;--muted:#6d706b;--line:#d9d9d1;
  --lime:#c8f35b;--lime-dark:#9ac52d;--violet:#9d8be8;--graphite:#242522;
  --shadow:0 14px 36px rgba(31,32,29,.08);--radius:10px;--container:1240px;
  --ease:cubic-bezier(.22,.75,.25,1)
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;background:var(--paper);color:var(--ink);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{border:0;cursor:pointer}
img{display:block;max-width:100%;object-fit:cover}
:focus-visible{outline:3px solid var(--lime-dark);outline-offset:3px}
.container{width:min(var(--container),calc(100% - 48px));margin:auto}
.topline{height:38px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted)}
.brand-mini{display:flex;align-items:center;gap:9px;font-weight:800;color:var(--ink)}
.brand-mark{width:17px;height:17px;background:var(--lime);display:inline-block;position:relative}
.brand-mark:after{content:"";width:7px;height:7px;background:var(--ink);position:absolute;right:3px;bottom:3px}
.status{display:flex;gap:20px}
.site-header{background:rgba(245,243,238,.96);position:relative;z-index:20}
.navbar{height:78px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
.logo{font-size:19px;font-weight:900;letter-spacing:-.06em;white-space:nowrap}
.nav-list{display:flex;align-items:center;gap:26px;margin-left:auto;margin-right:30px}
.nav-list a{font-size:13px;color:#555852;position:relative;padding:29px 0;white-space:nowrap}
.nav-list a:hover,.nav-list a.active{color:var(--ink)}
.nav-list a.active:after{content:"";position:absolute;left:0;right:0;bottom:17px;height:3px;background:var(--lime)}
.nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border:1px solid var(--ink);font-weight:800;font-size:14px;transition:transform .22s var(--ease),background .22s var(--ease),box-shadow .22s var(--ease)}
.nav-cta,.btn-primary{background:var(--ink);color:#fff}
.btn-secondary{background:transparent;color:var(--ink)}
.btn:hover{transform:translateY(-3px);box-shadow:0 8px 18px rgba(32,33,31,.13)}
.btn:active{transform:translateY(0)}
.menu-toggle{display:none;background:none;width:44px;height:44px;align-items:center;justify-content:center}
.menu-toggle span,.menu-toggle span:before,.menu-toggle span:after{width:22px;height:2px;background:var(--ink);display:block;content:"";position:relative}
.menu-toggle span:before{position:absolute;top:-7px}.menu-toggle span:after{position:absolute;top:7px}
.hero{min-height:650px;position:relative;overflow:hidden;padding:78px 0 54px;background:#ebe9e2}
.hero-bg{position:absolute;inset:0;background:url("/assets/images/6cd52146a8f7cb34.webp") center/cover no-repeat;opacity:.25;mix-blend-mode:multiply}
.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#ebe9e2 0%,rgba(235,233,226,.91) 40%,rgba(235,233,226,.2) 100%)}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:47% 53%;align-items:center;gap:30px}
.eyebrow,.section-kicker{font-size:12px;text-transform:uppercase;letter-spacing:.16em;font-weight:900;color:#687438;margin-bottom:18px}
.hero h1{font-size:clamp(44px,6vw,82px);line-height:1.04;letter-spacing:-.08em;max-width:620px;margin-bottom:25px}
.hero-copy{font-size:17px;color:#555850;max-width:590px;margin-bottom:30px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-stage{min-height:390px;position:relative;margin-left:20px}
.frame{position:absolute;border:8px solid #f7f5ef;background:#222;box-shadow:var(--shadow);overflow:hidden}
.frame img{width:100%;height:100%;opacity:.88}
.frame.one{width:62%;height:245px;right:4%;top:16px;transform:rotate(3deg)}
.frame.two{width:48%;height:205px;left:5%;bottom:35px;transform:rotate(-7deg)}
.frame.three{width:34%;height:150px;right:12%;bottom:0;transform:rotate(-2deg)}
.timeline{position:absolute;left:0;right:0;bottom:0;height:16px;background:var(--ink);border-left:52px solid var(--violet)}
.timeline:after{content:"";display:block;width:38%;height:4px;background:var(--lime);margin:6px 10px}
.hero-note{position:absolute;top:0;left:0;background:var(--lime);padding:8px 12px;font-size:12px;font-weight:900;z-index:2}
.slide-controls{display:flex;align-items:center;gap:12px;margin-top:35px;color:var(--muted);font-size:12px}
.slide-controls button{width:38px;height:38px;border:1px solid var(--ink);background:transparent}
.dots{display:flex;gap:6px}.dots i{width:22px;height:3px;background:#c6c6bd}.dots i:first-child{background:var(--ink)}
.section{padding:105px 0}.section.alt{background:#efeee8}.section.dark{background:var(--graphite);color:#f7f4eb}
.section-head{display:flex;justify-content:space-between;gap:35px;align-items:end;margin-bottom:45px}
.section-head h2{font-size:clamp(28px,4vw,48px);line-height:1.15;letter-spacing:-.06em;max-width:600px}
.section-head p{max-width:490px;color:var(--muted);font-size:15px}
.dark .section-head p{color:#aaa99f}
.matrix{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:65px}
.matrix-item{padding:22px 18px;border-right:1px solid var(--line);min-height:112px;transition:background .2s var(--ease)}
.matrix-item:last-child{border:0}.matrix-item:hover{background:var(--lime)}
.matrix-num{font-size:12px;color:var(--violet);font-weight:900}.matrix-item h3{font-size:17px;margin:9px 0 4px}.matrix-item p{font-size:12px;color:var(--muted)}
.intro-split{display:grid;grid-template-columns:1.1fr .9fr;gap:65px;align-items:center}
.visual-card{position:relative;background:var(--violet);padding:18px 18px 0;min-height:360px}
.visual-card img{width:100%;height:340px}.visual-label{position:absolute;bottom:15px;left:30px;background:var(--panel);padding:8px 12px;font-size:12px;font-weight:800}
.intro-copy h3{font-size:31px;line-height:1.25;letter-spacing:-.05em;margin-bottom:18px}.intro-copy p{color:var(--muted);margin-bottom:24px}
.specs{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:25px}.spec{border:1px solid var(--line);padding:13px;background:rgba(255,255,255,.5)}.spec b{display:block;font-size:16px}.spec span{font-size:12px;color:var(--muted)}
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.adv-card{padding:27px;border:1px solid var(--line);background:var(--panel);min-height:205px;transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease)}
.adv-card:nth-child(2),.adv-card:nth-child(5){transform:translateY(14px);background:#f0edf8}.adv-card:nth-child(3){background:#e5f4bc}.adv-card:hover{transform:translateY(-5px);border-color:var(--lime-dark);box-shadow:var(--shadow)}
.adv-card:nth-child(2):hover,.adv-card:nth-child(5):hover{transform:translateY(8px)}
.card-top{display:flex;justify-content:space-between;color:var(--violet);font-weight:900;font-size:12px}.line-icon{width:24px;height:24px;border:1px solid currentColor;border-radius:50%;position:relative}.line-icon:after{content:"";position:absolute;width:7px;height:1px;background:currentColor;right:3px;bottom:6px;transform:rotate(-45deg)}
.adv-card h3{font-size:20px;margin:30px 0 8px}.adv-card p{font-size:13px;color:var(--muted)}.micro{font-size:11px;color:#777;margin-top:17px;display:inline-block;border-bottom:2px solid var(--lime-dark)}
.product-grid{display:grid;grid-template-columns:5fr 4fr 3fr;gap:16px;align-items:stretch}
.product{background:var(--panel);border:1px solid var(--line);display:flex;flex-direction:column;overflow:hidden;transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.product:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.product:first-child{margin-top:26px}.product:nth-child(3){margin-top:52px}
.product img{height:225px;width:100%;transition:transform .3s var(--ease)}.product:hover img{transform:scale(1.035)}
.product:nth-child(2) img{height:270px}.product:nth-child(3) img{height:315px}
.product-body{padding:22px}.product h3{font-size:21px;line-height:1.3;margin:9px 0}.product p{font-size:13px;color:var(--muted);margin-bottom:17px}.meta{display:flex;flex-wrap:wrap;gap:7px;margin:16px 0}.tag{font-size:11px;padding:4px 8px;background:#ebe9e1;color:#5e6159}.product .btn{width:100%;min-height:40px;font-size:12px}
.workflow{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:0;margin-top:55px}.workflow:before{content:"";height:2px;background:var(--violet);position:absolute;top:24px;left:4%;right:4%}.step{position:relative;padding:0 18px}.step-no{width:50px;height:50px;background:var(--lime);border:2px solid var(--ink);display:flex;align-items:center;justify-content:center;font-weight:900;position:relative;z-index:1}.step h3{font-size:17px;margin:22px 0 8px}.step p{font-size:13px;color:var(--muted)}
.case-wall{display:grid;grid-template-columns:1.2fr .8fr .9fr 1.1fr;grid-auto-rows:170px;gap:12px}.case{position:relative;overflow:hidden;background:#343530;border:1px solid #555;color:#fff}.case:first-child{grid-row:span 2}.case:nth-child(4){grid-row:span 2}.case img{width:100%;height:100%;opacity:.78;transition:transform .3s var(--ease),opacity .3s}.case:hover img{transform:scale(1.06);opacity:.95}.case-info{position:absolute;left:15px;right:15px;bottom:13px;display:flex;justify-content:space-between;font-size:11px}.case-info b{font-size:14px}.play{position:absolute;top:15px;right:15px;width:32px;height:32px;border:1px solid var(--lime);color:var(--lime);display:grid;place-items:center}
.ruler{display:flex;gap:10px;flex-wrap:wrap;border-top:1px solid #555;margin-top:30px;padding-top:20px}.ruler span{font-size:12px;color:#d5d2c9;border-left:3px solid var(--lime);padding-left:9px}
.story-list{display:grid;gap:14px}.story{display:grid;grid-template-columns:1fr 1.5fr 1fr;align-items:center;border-top:1px solid var(--line);padding:25px 0;gap:30px}.story:last-child{border-bottom:1px solid var(--line)}.story-key{font-weight:900;font-size:18px}.story-key small{display:block;color:var(--violet);font-size:11px;margin-bottom:7px}.story-path{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted)}.path-box{padding:12px;background:#e9e8df}.arrow{color:var(--lime-dark);font-size:20px}.story-result{font-size:14px}.story-result b{display:block;font-size:18px;margin-bottom:4px}
.data-strip{background:#dce8bc;padding:42px 0}.data-grid{display:grid;grid-template-columns:repeat(4,1fr)}.data-item{padding:0 28px;border-right:1px solid #b8c598}.data-item:first-child{padding-left:0}.data-item:last-child{border:0}.data-number{font-size:38px;line-height:1;font-weight:900;letter-spacing:-.07em}.data-item p{font-size:13px;margin-top:10px;color:#505845}
.reviews{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:15px;align-items:start}.review{border:1px solid var(--line);background:var(--panel);padding:30px;min-height:220px;position:relative}.review:first-child{min-height:285px;background:#e9f5c9}.review:nth-child(2){margin-top:35px}.review:before{content:"“";font-size:70px;line-height:.7;color:var(--violet);opacity:.5}.review p{font-size:16px;margin:15px 0}.review small{color:var(--muted);font-size:12px}
.insights{display:grid;grid-template-columns:1.2fr .8fr;gap:45px}.insight-feature{display:grid;grid-template-columns:1fr 1fr;gap:20px;background:var(--panel);border:1px solid var(--line);padding:15px}.insight-feature img{height:245px;width:100%}.insight-feature h3{font-size:24px;line-height:1.35;margin:20px 0 12px}.insight-feature p,.insight-list p{font-size:13px;color:var(--muted)}.insight-list{border-top:1px solid var(--line)}.insight-list article{padding:18px 0;border-bottom:1px solid var(--line)}.insight-list b{font-size:16px;display:block}.insight-list span{font-size:11px;color:var(--violet)}
.partner-band{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.partner{border:1px solid var(--line);padding:14px 21px;font-size:14px;color:#777;background:#f0efe9;transition:color .2s,background .2s}.partner:hover{background:var(--lime);color:var(--ink)}
.faq-list{border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;background:transparent;min-height:68px;display:flex;align-items:center;justify-content:space-between;text-align:left;font-size:17px;font-weight:800}.faq-q span:last-child{font-size:25px;font-weight:400;color:var(--violet);transition:transform .2s}.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);color:var(--muted);font-size:14px;max-width:850px}.faq-item.open .faq-a{max-height:180px;padding:0 40px 22px 0}.faq-item.open .faq-q span:last-child{transform:rotate(45deg)}
.assurance{border:1px solid var(--line);display:grid;grid-template-columns:repeat(5,1fr);margin-top:30px}.assure{padding:23px 18px;border-right:1px solid var(--line)}.assure:last-child{border:0}.assure b{display:block;font-size:14px;margin:8px 0}.assure p{font-size:12px;color:var(--muted)}
.contact{background:var(--lime);padding:100px 0}.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:75px}.contact h2{font-size:clamp(34px,5vw,62px);line-height:1.08;letter-spacing:-.07em;margin-bottom:20px}.contact-copy{font-size:16px;max-width:450px}.contact-info{margin-top:34px;border-top:1px solid rgba(32,33,31,.35);padding-top:18px;font-size:13px;line-height:2}.contact-form{background:#f7f5ef;padding:30px;border:1px solid var(--ink)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}.field label{font-size:12px;font-weight:800}.field input,.field select,.field textarea{border:1px solid #c8c8bd;background:#fffefa;padding:12px 13px;min-height:44px;color:var(--ink);resize:vertical}.field textarea{min-height:105px}.form-submit{display:flex;align-items:center;gap:15px;margin-top:18px}.form-submit .btn{background:var(--ink);color:#fff}.form-tip{font-size:12px;color:var(--muted)}.form-message{font-size:13px;margin-top:12px;min-height:22px}
footer{background:var(--graphite);color:#eeeae0;padding:65px 0 25px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px;padding-bottom:45px}.footer-brand{font-size:21px;font-weight:900}.footer-grid h3{font-size:13px;color:var(--lime);margin-bottom:15px}.footer-grid p,.footer-grid a{font-size:13px;color:#aaa99f;display:block;margin:6px 0}.footer-grid a:hover{color:var(--lime)}.copyright{border-top:1px solid #494a45;padding-top:20px;color:#898981;font-size:12px;display:flex;justify-content:space-between;gap:20px}
@media(max-width:1024px){.nav-list{gap:14px;margin-right:15px}.nav-list a{font-size:12px}.hero-inner{grid-template-columns:1fr 1fr}.hero h1{font-size:58px}.matrix{grid-template-columns:repeat(3,1fr)}.matrix-item:nth-child(3){border-right:0}.product-grid{grid-template-columns:1fr 1fr}.product:first-child{grid-row:span 2}.product:nth-child(3){margin-top:0}.product:nth-child(3) img{height:225px}.workflow{grid-template-columns:repeat(3,1fr);row-gap:35px}.workflow:before{display:none}.assurance{grid-template-columns:repeat(3,1fr)}.assure:nth-child(3){border-right:0}.assure:nth-child(n+4){border-top:1px solid var(--line)}}
@media(max-width:768px){.container{width:min(100% - 32px,600px)}.status{display:none}.navbar{height:68px}.menu-toggle{display:flex}.nav-list{position:absolute;display:none;top:106px;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);padding:12px 20px;flex-direction:column;align-items:stretch;gap:0;box-shadow:var(--shadow)}.site-header.menu-open .nav-list{display:flex}.nav-list a{padding:13px 0;border-bottom:1px solid var(--line);font-size:14px}.nav-list a.active:after{bottom:0;top:0;left:-20px;right:auto;width:3px;height:auto}.nav-cta{display:none}.hero{padding:55px 0 35px}.hero-inner{display:block}.hero h1{font-size:clamp(43px,12vw,66px)}.hero-copy{font-size:15px}.hero-stage{margin:45px 0 0;min-height:310px}.frame.one{height:190px}.frame.two{height:165px}.frame.three{height:120px}.section{padding:72px 0}.section-head{display:block;margin-bottom:30px}.section-head p{margin-top:16px}.matrix{grid-template-columns:repeat(2,1fr);margin-bottom:45px}.matrix-item:nth-child(2){border-right:0}.matrix-item:nth-child(3){border-right:1px solid var(--line)}.matrix-item:nth-child(4){border-right:0}.intro-split,.insights,.contact-grid{grid-template-columns:1fr;gap:30px}.adv-grid{grid-template-columns:1fr 1fr}.adv-card:nth-child(2),.adv-card:nth-child(5){transform:none}.product-grid{grid-template-columns:1fr}.product:first-child,.product:nth-child(3){margin:0}.product img,.product:nth-child(2) img,.product:nth-child(3) img{height:230px}.workflow{grid-template-columns:1fr;gap:28px;margin-top:30px;margin-left:20px}.workflow:before{display:block;left:24px;top:25px;bottom:25px;width:2px;height:auto;right:auto}.step{padding-left:55px}.step-no{position:absolute;left:0}.case-wall{grid-template-columns:1fr 1fr;grid-auto-rows:155px}.case:first-child,.case:nth-child(4){grid-row:span 1}.data-grid{grid-template-columns:1fr 1fr;gap:25px}.data-item{border:0;padding:0}.reviews{grid-template-columns:1fr}.review:nth-child(2){margin:0}.insight-feature{grid-template-columns:1fr}.insight-feature img{height:210px}.assurance{grid-template-columns:1fr}.assure,.assure:nth-child(n+4),.assure:nth-child(3){border-right:0;border-top:1px solid var(--line)}.assure:first-child{border-top:0}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}}
@media(max-width:480px){.hero-actions .btn{width:100%}.hero-stage{min-height:265px}.frame.one{width:66%;height:165px}.frame.two{width:53%;height:140px}.frame.three{height:100px}.matrix,.adv-grid,.form-grid{grid-template-columns:1fr}.matrix-item,.matrix-item:nth-child(3){border-right:0;border-bottom:1px solid var(--line)}.matrix-item:last-child{border-bottom:0}.specs{grid-template-columns:1fr}.story{grid-template-columns:1fr;gap:12px}.story-path{font-size:11px}.case-wall{grid-template-columns:1fr;grid-auto-rows:190px}.data-number{font-size:30px}.contact{padding:70px 0}.contact-form{padding:20px}.footer-grid{grid-template-columns:1fr}.copyright{font-size:11px}}
@media(max-width:375px){.container{width:calc(100% - 28px)}.logo{font-size:16px}.hero h1{font-size:40px}.section{padding:58px 0}.section-head h2{font-size:29px}.hero-stage{margin-left:-4px;margin-right:-4px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}