:root{--bg:#f7f7f5;--card:#fff;--ink:#2e2e32;--muted:#707070;--line:#deded9;--accent:#e8602f;--soft:#ecece8;--dark:#111;--dark-soft:#1e1e1e;--shadow:0 18px 60px rgba(0,0,0,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.5}a{text-decoration:none;color:inherit}button,input,select,textarea{font:inherit}.section-shell{width:min(1180px,calc(100% - 48px));margin:auto}.site-header{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 32px;position:sticky;top:0;z-index:10;background:rgba(247,247,245,.78);backdrop-filter:blur(20px);border-bottom:1px solid rgba(0,0,0,.05)}.brand{display:grid;grid-template-columns:28px auto;grid-template-rows:16px 13px;column-gap:9px;align-items:center;font-weight:650;letter-spacing:-.02em}.brand small{grid-column:2;color:var(--muted);font-size:8px;letter-spacing:.12em;font-weight:500}.brand-mark{grid-row:1/3;width:28px;height:28px;border-radius:9px;background:var(--ink);color:#fff;display:grid;place-items:center;font-weight:700;font-size:17px}.main-nav{display:flex;gap:28px;color:#575757;font-size:13px}.main-nav a:hover,.footer-links a:hover{color:var(--accent)}.header-actions{display:flex;align-items:center;gap:14px}.icon-button,.modal-close{border:0;background:transparent;cursor:pointer}.icon-button{font-size:19px}.nav-cta{font-size:13px;background:var(--ink);color:white;padding:10px 14px;border-radius:22px}.nav-cta span,.button span,.text-link span{margin-left:7px}.hero{min-height:650px;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:70px;padding:78px 0 95px}.eyebrow{font-size:11px;letter-spacing:.17em;color:var(--muted);font-weight:650;margin:0 0 18px}.hero h1{font-size:clamp(36px,4.4vw,56px);line-height:1.08;letter-spacing:-.055em;margin:0 0 24px;font-weight:720;color:#34343a}.hero h1 em,.section-heading h2 em,.dark-section h2 em,.rfq-copy h2 em{font-style:normal;color:var(--accent)}
.hero h1 span,.hero h1 em{display:block}.hero-lead{font-size:16.5px;max-width:470px;color:#5b5b60;line-height:1.65}.hero-actions{display:flex;align-items:center;gap:24px;margin-top:35px}.button{border:0;display:inline-flex;align-items:center;justify-content:center;padding:14px 21px;border-radius:28px;font-size:14px;font-weight:600;cursor:pointer;transition:.2s transform,.2s background}.button:hover{transform:translateY(-2px)}.button-dark{background:var(--ink);color:#fff}.button-light{background:#fff;color:#111}.text-link{font-size:14px;font-weight:600}.hero-visual{height:440px;position:relative;overflow:hidden;border-radius:34px;background:linear-gradient(145deg,#d9d9d4,#f6f6f2 45%,#d4d5d1);box-shadow:var(--shadow)}.hero-visual p{position:absolute;bottom:28px;left:30px;font-size:13px;letter-spacing:.04em;line-height:1.4;color:#555}.orb{position:absolute;border-radius:50%;filter:blur(1px)}.orb-one{width:300px;height:300px;background:radial-gradient(circle at 30% 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0}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:50px;margin-bottom:54px}.section-heading h2,.rfq-copy h2{font-size:clamp(31px,4vw,48px);line-height:1.08;letter-spacing:-.055em;margin:0}.section-note{max-width:320px;color:var(--muted);font-size:14px;margin:0 0 3px}.filter-bar{display:flex;gap:9px;margin-bottom:26px;flex-wrap:wrap}.filter{border:1px solid var(--line);background:transparent;color:#777;border-radius:24px;padding:10px 15px;font-size:13px;cursor:pointer}.filter.is-active,.filter:hover{background:var(--ink);border-color:var(--ink);color:#fff}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.product-card{background:var(--card);border-radius:25px;overflow:hidden;cursor:pointer;transition:.25s transform,.25s box-shadow;min-height:380px}.product-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.card-visual{height:225px;position:relative;overflow:hidden;background:linear-gradient(145deg,#dadbd7,#f6f6f2)}.card-visual:after{content:"";position:absolute;inset:23px 28px;border:7px solid rgba(31,32,31,.82);border-radius:3px;box-shadow:inset 0 0 0 3px rgba(255,255,255,.13)}.visual-window:after{background:linear-gradient(90deg,transparent 48%,rgba(31,32,31,.8) 48%,rgba(31,32,31,.8) 52%,transparent 52%),linear-gradient(0deg,transparent 48%,rgba(31,32,31,.8) 48%,rgba(31,32,31,.8) 52%,transparent 52%),linear-gradient(135deg,rgba(255,255,255,.5),rgba(188,220,224,.4))}.visual-door:after{inset:18px 50px;border-width:8px;background:linear-gradient(90deg,transparent 48%,rgba(31,32,31,.8) 48%,rgba(31,32,31,.8) 52%,transparent 52%),linear-gradient(135deg,rgba(255,255,255,.5),rgba(188,220,224,.4))}.visual-sunroom{background:linear-gradient(135deg,#bcc7c6,#eef1e8)}.visual-sunroom:after{inset:32px 30px 25px;border-width:5px;transform:skewY(-10deg);background:linear-gradient(90deg,transparent 30%,rgba(31,32,31,.75) 30%,rgba(31,32,31,.75) 33%,transparent 33%,transparent 66%,rgba(31,32,31,.75) 66%,rgba(31,32,31,.75) 69%,transparent 69%),linear-gradient(135deg,rgba(255,255,255,.45),rgba(170,201,202,.25))}.visual-interior:after{inset:35px 70px;border-width:6px;background:linear-gradient(90deg,transparent 48%,rgba(31,32,31,.8) 48%,rgba(31,32,31,.8) 52%,transparent 52%),linear-gradient(135deg,rgba(255,255,255,.5),rgba(188,220,224,.4))}.card-copy{padding:22px 23px}.card-copy .eyebrow{margin-bottom:10px}.card-copy h3{font-size:25px;letter-spacing:-.04em;margin:0 0 8px}.card-copy p{font-size:13px;color:var(--muted);margin:0}.card-foot{display:flex;justify-content:space-between;align-items:center;margin-top:17px;font-size:12px;color:#999}.card-foot b{color:var(--ink);font-weight:600}.dark-section{background:var(--dark);color:#fff;padding:130px 0}.muted{color:#969692}.solution-layout{display:grid;grid-template-columns:1fr 1fr;gap:100px}.dark-section h2{font-size:clamp(46px,6vw,72px);line-height:1.02;letter-spacing:-.07em;margin:0 0 30px}.dark-lead{color:#a8a8a4;font-size:17px;max-width:400px;margin-bottom:38px}.solution-cards{display:grid;gap:14px}.solution-cards article{background:var(--dark-soft);border:1px solid #30302f;border-radius:21px;padding:24px 25px}.solution-cards span{color:var(--accent);font-size:12px}.solution-cards h3{font-size:21px;margin:21px 0 8px;letter-spacing:-.04em}.solution-cards p{color:#9c9c99;font-size:13px;margin:0}.proof-section{padding-bottom:80px}.proof-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.proof-card{min-height:250px;border:1px solid var(--line);border-radius:24px;padding:28px;display:flex;gap:23px;background:rgba(255,255,255,.33)}.proof-logo{font-size:25px;font-weight:720;letter-spacing:-.08em;line-height:.9;min-width:63px}.proof-logo small{font-size:12px;letter-spacing:.05em}.proof-card h3{margin:6px 0 12px;font-size:21px;letter-spacing:-.04em}.proof-card p{font-size:13px;color:var(--muted);margin:0}.proof-tag{display:inline-block;margin-top:18px;font-size:11px;padding:5px 9px;border-radius:14px;background:#e8e8e3;color:#5a5a56}.capacity-card{justify-content:space-between;align-items:center}.capacity-ring{width:90px;height:90px;border:1px solid #bbb;border-radius:50%;display:grid;place-items:center;flex-shrink:0}.capacity-ring span{font-size:22px;font-weight:700;letter-spacing:-.08em}.quote-banner{background:var(--accent);color:#fff;padding:120px 0}.quote-inner h2{font-size:clamp(47px,7vw,86px);line-height:1.02;letter-spacing:-.075em;margin:0 0 38px}.quote-inner .eyebrow{color:rgba(255,255,255,.75)}.rfq-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:105px}.rfq-copy>p:not(.eyebrow){color:var(--muted);font-size:15px;max-width:330px;margin-top:24px}.response-note{font-size:12px;margin-top:40px}.response-note span{color:#22a35a;margin-right:7px}.rfq-form{display:grid;grid-template-columns:1fr 1fr;gap:20px 16px}.rfq-form label{display:grid;gap:7px;font-size:12px;color:var(--muted)}.rfq-form input,.rfq-form select,.rfq-form textarea{border:0;border-bottom:1px solid #cfcfc9;background:transparent;border-radius:0;padding:10px 0;outline:0;color:var(--ink);resize:vertical}.rfq-form input:focus,.rfq-form select:focus,.rfq-form textarea:focus{border-color:var(--accent)}.full{grid-column:1/-1}.form-status{margin:0;font-size:13px;color:#27874b}.site-footer{background:#ecece8;padding:33px 0}.floating-quote{position:fixed;right:22px;bottom:22px;z-index:15;display:inline-flex;align-items:center;gap:7px;background:var(--dark);color:#fff;border-radius:999px;padding:13px 19px;font-size:13.5px;font-weight:650;box-shadow:0 10px 30px rgba(0,0,0,.18);transition:transform .2s,background .2s}.floating-quote:hover{background:var(--accent);transform:translateY(-2px)}.floating-quote .fq-arrow{margin-left:2px}.dark-mode .floating-quote{background:#fff;color:#111}.footer-inner{display:flex;justify-content:space-between;align-items:center}.footer-links{display:flex;align-items:center;gap:25px;color:#777;font-size:12px}.footer-links span{color:#aaa}.footer-contact{display:grid;gap:5px;color:#7b7b76;font-size:12px;text-align:right;max-width:340px;line-height:1.45}.footer-contact strong{color:#555;font-size:12.5px;font-weight:600}.footer-contact b{color:var(--accent);font-weight:600}.wa-link{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.wa-link:hover{color:var(--dark)}.wa-cta{display:inline-flex;align-items:center;gap:6px;margin-top:16px;color:var(--accent);font-size:13px;font-weight:650;text-decoration:underline;text-underline-offset:3px}.wa-cta:hover{color:var(--dark)}.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.42);backdrop-filter:blur(10px);z-index:20;display:grid;place-items:center;padding:20px}.modal-backdrop[hidden]{display:none}.product-modal{width:min(820px,100%);max-height:90vh;overflow:auto;background:var(--card);border-radius:28px;display:grid;grid-template-columns:.9fr 1.1fr;position:relative;box-shadow:0 25px 100px rgba(0,0,0,.25)}.modal-close{position:absolute;right:18px;top:12px;font-size:28px;z-index:2;color:#777}.modal-visual{min-height:420px;background:linear-gradient(145deg,#d1d4cf,#f5f5f1);position:relative}.modal-visual:after{content:"";position:absolute;inset:70px 45px;border:12px solid rgba(25,26,25,.86);background:linear-gradient(90deg,transparent 48%,rgba(25,26,25,.8) 48%,rgba(25,26,25,.8) 52%,transparent 52%),linear-gradient(135deg,rgba(255,255,255,.52),rgba(180,212,215,.32))}.modal-content{padding:52px 40px 40px}.modal-content h2{font-size:42px;letter-spacing:-.065em;line-height:1;margin:0 0 18px}.modal-content>p:not(.eyebrow){font-size:14px;color:var(--muted)}.modal-specs{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:27px 0}.spec-item{background:var(--soft);padding:12px;border-radius:12px}.spec-item small{display:block;color:#888;font-size:10px}.spec-item b{font-size:14px}.modal-price{font-size:13px;color:#555;margin:18px 0}.modal-price strong{font-size:24px;color:var(--ink);letter-spacing:-.04em;margin-right:5px}.modal-price span{color:#999}.dark-mode{--bg:#111;--card:#1c1c1b;--ink:#f4f4f0;--muted:#a2a29d;--line:#343432;--soft:#292927}.dark-mode .site-header{background:rgba(17,17,17,.8);border-color:#292927}.dark-mode .brand-mark{background:#fff;color:#111}.dark-mode .intro-strip,.dark-mode .site-footer{background:#1a1a19;border-color:#2d2d2a}.dark-mode .hero-visual,.dark-mode .card-visual{background:linear-gradient(145deg,#303330,#171918)}.dark-mode .filter{border-color:#444}.dark-mode .proof-card{background:rgba(255,255,255,.03)}.dark-mode .proof-tag{background:#2d2d2a;color:#aaa}.dark-mode .rfq-form input,.dark-mode .rfq-form select,.dark-mode .rfq-form textarea{color:var(--ink);border-color:#484844}.dark-mode .button-dark{background:#fff;color:#111}.dark-mode .nav-cta{background:#fff;color:#111}.dark-mode .modal-visual{background:linear-gradient(145deg,#303330,#171918)}
@media(max-width:900px){.main-nav{display:none}.hero{grid-template-columns:1fr;gap:35px;padding-top:60px}.hero-visual{height:360px}.product-grid,.proof-grid{grid-template-columns:1fr 1fr}.solution-layout,.rfq-section{grid-template-columns:1fr;gap:55px}.section-block{padding:90px 0}.section-heading{display:block}.section-note{margin-top:22px}.rfq-section{padding-top:90px}.footer-inner{display:block}.footer-links{margin-top:25px;flex-wrap:wrap}.footer-contact{text-align:left;margin-top:22px;max-width:none}.product-modal{grid-template-columns:1fr}.modal-visual{min-height:220px}.modal-visual:after{inset:35px 24%;}}
@media(max-width:560px){.site-header{padding:0 18px}.section-shell{width:calc(100% - 36px)}.header-actions .icon-button{display:none}.hero h1{font-size:54px}.hero-lead{font-size:14px}.stat-row{grid-template-columns:1fr 1fr;gap:22px}.stat-row div:nth-child(3){border:0;padding-left:0}.product-grid,.proof-grid{grid-template-columns:1fr}.section-heading h2{font-size:45px}.dark-section h2,.quote-inner h2{font-size:49px}.rfq-form{grid-template-columns:1fr}.full{grid-column:auto}.rfq-form .full{grid-column:1}.footer-links{gap:16px}.footer-links span{width:100%;margin-top:5px}.footer-contact{width:100%}.modal-content{padding:40px 25px 28px}.modal-content h2{font-size:35px}.floating-quote{right:14px;bottom:14px;padding:11px 15px;font-size:12.5px}}
:root{--ink:#1d1d1f;--muted:#6e6e73;--accent:#1d1d1f}.quote-banner{background:#1d1d1f}.hero h1{font-size:clamp(19px,5.6vw,25px);letter-spacing:-.035em;word-break:keep-all;hyphens:none}.section-heading h2,.rfq-copy h2{font-size:clamp(25px,6.6vw,34px)}.dark-section h2{font-size:clamp(42px,5vw,62px)}.lang-button{border:0;background:transparent;color:var(--muted);font-size:12px;letter-spacing:.08em;cursor:pointer;padding:6px}.lang-button:hover{color:var(--ink)}
.market-pills{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:22px}.market-pills button{border:1px solid #3b3b3a;background:#242423;color:#f4f4f0;border-radius:12px;padding:10px 11px;text-align:left;font-size:12px;cursor:pointer}.market-pills button:hover,.market-pills button.is-selected{background:#fff;color:#111}.market-pills button span{display:block;color:#9b9b97;font-size:10px;margin-top:2px}.market-pills button:hover span,.market-pills button.is-selected span{color:#666}.market-detail{font-size:11px;line-height:1.5;color:#9b9b97;margin-top:12px;min-height:34px}.placeholder-card small{display:inline-block;color:#666;font-size:9px;letter-spacing:.15em;margin-top:18px}.image-strip{position:absolute;left:22px;right:22px;bottom:18px;display:grid;grid-template-columns:repeat(5,1fr);gap:7px;z-index:1}.image-strip span{height:34px;border:1px solid rgba(30,30,30,.38);border-radius:7px;background:rgba(255,255,255,.38);display:grid;place-items:center;font-size:10px;color:#555}.dark-mode .image-strip span{border-color:#777;background:rgba(255,255,255,.15);color:#eee}.card-copy h3{font-size:21px}.card-copy p{font-size:12px}.solution-cards h3{font-size:19px}.solution-cards p{font-size:12px}.proof-card h3{font-size:19px}.proof-card p{font-size:12px}.rfq-form label{font-size:11px}
.modal-visual:after{display:none}.gallery-viewport{position:absolute;inset:0;overflow:hidden}.gallery-track{height:100%;width:500%;display:flex;transition:transform .42s cubic-bezier(.2,.75,.25,1)}.gallery-slide{height:100%;width:20%;flex:none;position:relative;background:linear-gradient(145deg,#d1d4cf,#f5f5f1)}.gallery-slide:after{content:"";position:absolute;inset:70px 18%;border:11px solid rgba(25,26,25,.86);background:linear-gradient(90deg,transparent 48%,rgba(25,26,25,.8) 48%,rgba(25,26,25,.8) 52%,transparent 52%),linear-gradient(135deg,rgba(255,255,255,.52),rgba(180,212,215,.32))}.gallery-slide span{position:absolute;left:30px;top:25px;color:#777;font-size:11px;letter-spacing:.14em}.slide-b{background:linear-gradient(145deg,#c8cfcb,#e9ede8)}.slide-b:after{inset:55px 23%;transform:rotate(-7deg)}.slide-c{background:linear-gradient(145deg,#e5e3da,#bcc4c0)}.slide-c:after{inset:82px 14%;border-width:8px}.slide-d{background:linear-gradient(145deg,#d9d6d0,#f2f0e9)}.slide-d:after{inset:62px 28%;border-width:7px}.slide-e{background:linear-gradient(145deg,#c4cdcc,#eef1ed)}.slide-e:after{inset:45px 12%;border-width:6px}.gallery-arrow{position:absolute;top:43%;z-index:2;width:34px;height:34px;border:0;border-radius:50%;background:rgba(255,255,255,.8);color:#333;font-size:25px;line-height:1;cursor:pointer}.gallery-prev{left:18px}.gallery-next{right:18px}.image-strip span{cursor:pointer}.image-strip span.is-current{background:#1d1d1f;color:#fff;border-color:#1d1d1f}.modal-content h2{font-size:34px;letter-spacing:-.05em}.modal-content>p:not(.eyebrow){font-size:13px}.modal-specs{gap:9px;margin:20px 0}.spec-item{padding:10px}.spec-item b{font-size:13px}.modal-price strong{font-size:21px}.modal-content .button{font-size:13px;padding:12px 17px}
.brand-vast{display:block;width:168px;height:auto}.brand-vast img{display:block;width:100%;height:auto}.footer-brand{width:190px}
.card-visual:before,.gallery-slide:before{content:"";position:absolute;z-index:2;left:14px;top:14px;width:64px;height:20px;background:url('assets/brand/vast-logo.png') left center/contain no-repeat;opacity:.9;pointer-events:none}.gallery-slide:before{left:22px;top:20px;width:92px;height:28px}.dark-mode .card-visual:before,.dark-mode .gallery-slide:before{filter:brightness(0) invert(1);opacity:.82}
.gallery-slide span{display:none}.image-strip{left:0;right:0;bottom:18px;display:flex;justify-content:center;align-items:center;gap:9px}.image-strip span{width:7px;height:7px;min-width:7px;padding:0;border:0;border-radius:50%;background:#a7a7a4;display:block;cursor:pointer;transition:transform .2s,background .2s}.image-strip span.is-current{width:9px;height:9px;min-width:9px;background:#1d1d1f;border:0;transform:none}.gallery-arrow{width:44px;height:44px;background:#1d1d1f;color:#fff;font-size:28px;box-shadow:0 8px 20px rgba(0,0,0,.12)}.gallery-arrow:hover{background:#3a3a3a}.modal-content .button{min-height:44px;font-size:13px;background:#1d1d1f;color:#fff}.dark-mode .gallery-arrow,.dark-mode .modal-content .button{background:#fff;color:#111}.dark-mode .image-strip span{background:#777}.dark-mode .image-strip span.is-current{background:#fff}
.modal-content .button{font-size:16px}
.hero-track{height:100%;width:300%;display:flex;transition:transform .45s cubic-bezier(.2,.75,.25,1)}.hero-slide{width:33.3333%;height:100%;flex:none;position:relative;overflow:hidden;background:linear-gradient(145deg,#d9d9d4,#f6f6f2 45%,#d4d5d1)}.hero-slide-b{background:linear-gradient(145deg,#d1d5d2,#f7f7f3 48%,#cfd2ce)}.hero-slide-c{background:linear-gradient(145deg,#d7d5cf,#f5f4ee 48%,#cbd2d0)}.window-frame-wide{width:310px;height:245px;transform:translate(-50%,-54%) rotate(6deg)}.window-frame-tall{width:210px;height:320px;transform:translate(-50%,-54%) rotate(-4deg)}.hero-arrow{position:absolute;z-index:3;top:50%;transform:translateY(-50%);width:38px;height:38px;border:0;border-radius:50%;background:rgba(29,29,31,.86);color:#fff;font-size:24px;line-height:1;cursor:pointer;opacity:0;transition:opacity .2s}.hero-visual:hover .hero-arrow{opacity:1}.hero-prev{left:18px}.hero-next{right:18px}.hero-dots{position:absolute;z-index:3;left:0;right:0;bottom:18px;display:flex;justify-content:center;gap:8px}.hero-dots span{width:7px;height:7px;border-radius:50%;background:rgba(29,29,31,.35);cursor:pointer}.hero-dots span.is-current{width:9px;height:9px;background:#1d1d1f}.dark-mode .hero-arrow{background:rgba(255,255,255,.9);color:#111}.dark-mode .hero-dots span{background:rgba(255,255,255,.4)}.dark-mode .hero-dots span.is-current{background:#fff}


/* ===== Pitfall comparison (overseas buyer pain points vs Qicheng) ===== */
.pit{padding:10px 0 0}
.pit-card{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:clamp(26px,4vw,44px);box-shadow:var(--shadow)}
.pit-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:28px}
.pit-col{border-radius:18px;padding:22px 24px}
.pit-pain{background:var(--soft)}
.pit-gain{background:var(--soft)}
.pit-col h3{font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 6px}
.pit-gain h3{color:var(--accent)}
.pit-col ul{list-style:none;margin:0;padding:0}
.pit-col li{display:flex;gap:10px;align-items:flex-start;padding:12px 0;font-size:15px;line-height:1.5}
.pit-col li+li{border-top:1px solid rgba(0,0,0,.06)}
.pit-mark{flex:none;width:19px;height:19px;margin-top:1px;border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:700;line-height:1}
.pit-pain .pit-mark{background:#E5E5EA;color:#8E8E93}
.pit-gain .pit-mark{background:var(--accent);color:#fff}
.pit-pain li{color:var(--muted)}
.pit-gain li{color:var(--ink)}
@media(max-width:900px){.pit-grid{grid-template-columns:1fr}}

/* product real images */
.card-visual .card-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;z-index:1}
.modal-visual.has-img{background:#fff}
.modal-visual.has-img:after{display:none}
.modal-visual .modal-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}