/* ============================================================
   Dingshengan — Professional Roofing Manufacturer
   Main Stylesheet v3
   ============================================================ */

:root {
  --pri: #0D2137;
  --pri-light: #1A3D5C;
  --pri-dark: #060F1A;
  --acc: #E8781A;
  --acc-light: #FF9A3C;
  --acc-dark: #C56010;
  --wht: #FFFFFF;
  --bg: #FFFFFF;
  --bg-alt: #F4F6F8;
  --bg-dark: #0D2137;
  --txt: #1E293B;
  --txt-light: #64748B;
  --txt-on-dark: #CBD5E1;
  --bdr: #E2E8F0;
  --grn: #16A34A;
  --font: "Poppins", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-heading: "Poppins", "Noto Sans SC", sans-serif;
  --max: 1200px;
  --head-h: 72px;
  --rad: 6px;
  --rad-lg: 12px;
  --sh: 0 2px 16px rgba(0,0,0,0.06);
  --sh-lg: 0 8px 40px rgba(0,0,0,0.1);
  --tr: 0.25s ease;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:var(--head-h)}
body{font-family:var(--font);font-size:16px;line-height:1.7;color:var(--txt);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{cursor:pointer;border:none;font-family:inherit;font-size:inherit}
input,textarea,select{font-family:inherit;font-size:inherit}

/* ---------- Container / Section ---------- */
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
.section{padding:90px 0}
.section--alt{background:var(--bg-alt)}
.section--dark{background:var(--bg-dark);color:var(--txt-on-dark)}
.section__header{text-align:center;margin-bottom:56px}
.section__header--light .section__title{color:var(--wht)}
.section__header--light .section__subtitle{color:var(--txt-on-dark);opacity:.8}
.section__title{font-size:2.1rem;font-weight:800;color:var(--pri);margin-bottom:12px;line-height:1.3;font-family:var(--font-heading)}
.section__title--left{text-align:left}
.section__subtitle{font-size:1.1rem;color:var(--txt-light);max-width:650px;margin:0 auto}
.section__overline{display:inline-block;text-transform:uppercase;letter-spacing:2px;font-size:.85rem;font-weight:700;color:var(--acc);margin-bottom:8px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:6px;font-weight:700;font-size:.95rem;transition:all var(--tr);text-align:center;justify-content:center}
.btn--accent{background:var(--acc);color:var(--wht);box-shadow:0 4px 14px rgba(232,120,26,0.35)}
.btn--accent:hover{background:var(--acc-dark);transform:translateY(-2px);box-shadow:0 6px 20px rgba(232,120,26,0.5)}
.btn--primary{background:var(--pri);color:var(--wht)}
.btn--primary:hover{background:var(--pri-light);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--wht);border:2px solid rgba(255,255,255,0.5)}
.btn--ghost:hover{background:rgba(255,255,255,0.1);border-color:var(--wht)}
.btn--white{background:var(--wht);color:var(--pri);font-weight:700}
.btn--white:hover{background:#e2e8f0;transform:translateY(-2px)}
.btn--outline-white{background:transparent;color:var(--wht);border:2px solid var(--wht)}
.btn--outline-white:hover{background:var(--wht);color:var(--pri)}
.btn--whatsapp{background:#25D366;color:var(--wht);width:100%;font-size:1rem;padding:16px}
.btn--whatsapp:hover{background:#1da851}
.btn--full{width:100%}

/* ---------- Top Bar ---------- */
.topbar{background:var(--pri-dark);color:var(--txt-on-dark);font-size:.85rem;padding:8px 0}
.topbar__inner{display:flex;align-items:center;gap:20px;flex-wrap:wrap;justify-content:flex-end}
.topbar__inner>span>a{color:var(--txt-on-dark);opacity:.85;transition:opacity var(--tr)}
.topbar__inner>span>a:hover{opacity:1;color:var(--acc-light)}
.topbar__lang-group{display:flex;align-items:center;gap:4px}
.topbar__lang-btn{padding:3px 10px;border-radius:3px;font-size:.8rem;font-weight:600;background:transparent;color:var(--txt-on-dark);opacity:.7;transition:all var(--tr)}
.topbar__lang-btn.active{background:var(--acc);color:var(--wht);opacity:1}
.topbar__lang-btn:hover:not(.active){opacity:1}
.topbar__translate-sep{width:1px;height:18px;background:rgba(255,255,255,0.2);margin:0 6px}
.topbar__gt{font-size:.8rem}
.topbar__gt .goog-te-combo{background:rgba(255,255,255,0.1);color:var(--wht);border:1px solid rgba(255,255,255,0.2);border-radius:3px;padding:3px 8px;font-size:.78rem;font-family:var(--font);outline:none;cursor:pointer}
.topbar__gt .goog-te-combo option{background:var(--pri-dark);color:var(--wht)}
/* Hide Google top banner */
body>.skiptranslate,.goog-te-banner-frame{display:none!important}
body{top:0!important}

/* ---------- Header ---------- */
.header{position:sticky;top:0;z-index:1000;background:var(--wht);border-bottom:1px solid var(--bdr);height:var(--head-h);transition:transform var(--tr)}
.header--hidden{transform:translateY(-100%)}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:100%}
.header__logo{display:flex;align-items:center;gap:12px}
.header__logo-mark{width:42px;height:42px;background:var(--pri);color:var(--wht);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.3rem;border-radius:var(--rad);flex-shrink:0}
.header__logo-img{width:42px;height:42px;border-radius:var(--rad);object-fit:cover;flex-shrink:0}
.header__logo-name{font-weight:800;font-size:1.15rem;color:var(--pri);line-height:1.2}
.header__logo-tag{font-size:.7rem;color:var(--txt-light);text-transform:uppercase;letter-spacing:1px}
.header__nav-list{display:flex;gap:10px;align-items:center}
.header__nav-link{padding:10px 16px;border-radius:var(--rad);font-size:.88rem;font-weight:500;color:var(--txt);transition:all var(--tr);font-family:var(--font-heading)}
.header__nav-link:hover{background:var(--bg-alt);color:var(--pri)}
.header__nav-link--cta{background:var(--acc);color:var(--wht)!important;font-weight:700;padding:10px 20px}
.header__nav-link--cta:hover{background:var(--acc-dark)!important;color:var(--wht)!important}

/* Nav Pill Buttons */
.header__nav-list{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:center}
.header__nav-link,
.header__cat-btn{padding:10px 20px;border-radius:50px;font-size:.88rem;font-weight:700;color:var(--wht);transition:all .3s ease;font-family:var(--font-heading);letter-spacing:.2px;background:linear-gradient(135deg,var(--acc),var(--acc-dark));box-shadow:0 3px 12px rgba(232,120,26,.3);white-space:nowrap}
.header__nav-link:hover,
.header__cat-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(232,120,26,.45);color:var(--wht)}
.header__cat-btn--cta{background:linear-gradient(135deg,var(--pri),var(--pri-light));box-shadow:0 3px 12px rgba(13,33,55,.3)}
.header__cat-btn--cta:hover{box-shadow:0 6px 20px rgba(13,33,55,.45)}

.header__cta-btn{display:none}
.header__menu-btn{display:none;flex-direction:column;gap:5px;background:none;padding:4px}
.header__menu-btn span{width:22px;height:2px;background:var(--pri);border-radius:2px;transition:var(--tr)}
.header__menu-btn.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.header__menu-btn.active span:nth-child(2){opacity:0}
.header__menu-btn.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ---------- Hero ---------- */
.hero{position:relative;background:linear-gradient(160deg,#060F1A 0%,#0D2137 40%,#1A3D5C 100%);color:var(--wht);overflow:hidden}
.hero__bg{position:absolute;inset:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><defs><pattern id="g" width="60" height="60" patternUnits="userSpaceOnUse"><path d="M 60 0 L 0 0 0 60" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="1"/></pattern></defs><rect width="1200" height="600" fill="url(%23g)"/></svg>') repeat;opacity:.5;pointer-events:none}
.hero__content{position:relative;z-index:1;text-align:center;padding:100px 24px 60px}
.hero__badge{display:inline-block;background:rgba(232,120,26,0.2);color:var(--acc-light);padding:8px 20px;border-radius:50px;font-size:.85rem;font-weight:600;margin-bottom:24px;border:1px solid rgba(232,120,26,0.3)}
.hero__title{font-size:clamp(2.2rem,5vw,3.4rem);font-weight:900;line-height:1.15;margin-bottom:20px;letter-spacing:-0.02em}
.hero__subtitle{font-size:1.15rem;opacity:.85;max-width:750px;margin:0 auto 36px;line-height:1.7}
.hero__cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:48px}
.hero__trust{display:flex;gap:32px;justify-content:center;flex-wrap:wrap;opacity:.8}
.hero__trust-item{display:flex;align-items:center;gap:8px;font-size:.9rem}
.hero__trust-item span:first-child{color:var(--grn);font-weight:700}
/* Scroll-down indicator */
.hero__scroll-down{position:absolute;bottom:120px;left:50%;transform:translateX(-50%);z-index:2;text-align:center;animation:heroBounce 2s ease-in-out infinite}
.hero__scroll-down span{display:block;font-size:.75rem;color:rgba(255,255,255,.6);text-transform:uppercase;letter-spacing:2px;margin-bottom:6px}
.hero__scroll-arrow{font-size:1.2rem;color:rgba(255,255,255,.5)}
@keyframes heroBounce{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}

.hero__stats-row{position:relative;z-index:1;background:rgba(0,0,0,0.3);border-top:1px solid rgba(255,255,255,0.08);backdrop-filter:blur(10px)}
.hero__stats{display:grid;grid-template-columns:repeat(4,1fr);gap:2px}
.hero__stat{text-align:center;padding:28px 16px}
.hero__stat-num{display:block;font-size:2rem;font-weight:900;color:var(--acc-light);margin-bottom:2px}
.hero__stat-lbl{font-size:.85rem;opacity:.7}

/* ---------- Quick Nav Cards ---------- */
.quicknav__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quicknav-card{position:relative;border-radius:var(--rad-lg);overflow:hidden;min-height:280px;display:flex;align-items:flex-end;cursor:pointer;transition:all .35s ease;text-decoration:none;color:var(--wht)}
.quicknav-card:hover{transform:translateY(-6px);box-shadow:var(--sh-lg)}
.quicknav-card__bg{position:absolute;inset:0;background-size:cover;background-position:center;transition:transform .5s ease}
.quicknav-card:hover .quicknav-card__bg{transform:scale(1.08)}
.quicknav-card__bg::after{content:'';position:absolute;inset:0;background:linear-gradient(to top,rgba(6,15,26,.92) 0%,rgba(6,15,26,.35) 50%,rgba(6,15,26,.1) 100%)}
.quicknav-card__body{position:relative;z-index:1;padding:28px 24px;width:100%}
.quicknav-card__icon{font-size:2rem;display:block;margin-bottom:10px}
.quicknav-card h3{font-size:1.3rem;font-weight:800;margin-bottom:6px;font-family:var(--font-heading)}
.quicknav-card p{font-size:.9rem;opacity:.85;margin-bottom:12px;line-height:1.5}
.quicknav-card__link{display:inline-block;font-weight:700;font-size:.9rem;color:var(--acc-light);transition:all .25s}
.quicknav-card:hover .quicknav-card__link{color:var(--wht);padding-left:4px}

@media(max-width:768px){
  .quicknav__grid{grid-template-columns:1fr}
}

/* ---------- About ---------- */
.about-strip__grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.about-strip__image{position:relative;border-radius:var(--rad-lg);overflow:hidden;box-shadow:var(--sh-lg)}
.about-strip__image img{width:100%}
.about-strip__badge{position:absolute;bottom:20px;left:20px;background:var(--acc);color:var(--wht);padding:12px 20px;border-radius:var(--rad);text-align:center;line-height:1.3}
.about-strip__badge span{display:block;font-size:.75rem;text-transform:uppercase;opacity:.9}
.about-strip__badge strong{font-size:1.5rem;font-weight:800}
.about-strip__content p{margin-bottom:14px;color:var(--txt-light);line-height:1.8}
.about-strip__list{margin:20px 0 24px;display:grid;grid-template-columns:1fr 1fr;gap:10px}
.about-strip__list li{padding:10px 14px;background:var(--bg-alt);border-radius:var(--rad);font-size:.9rem;border-left:3px solid var(--acc);font-weight:500}

/* ---------- Product Detail ---------- */
.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.product-detail--reverse{direction:rtl}
.product-detail--reverse .product-detail__info{direction:ltr}
.product-detail--reverse .product-detail__gallery{direction:ltr}
.product-detail__main{position:relative;border-radius:var(--rad-lg);overflow:hidden;box-shadow:var(--sh);margin-bottom:14px}
.product-detail__main img{width:100%;aspect-ratio:4/3;object-fit:cover}
.product-detail__tag{position:absolute;top:16px;left:16px;background:var(--acc);color:var(--wht);padding:6px 16px;border-radius:50px;font-size:.8rem;font-weight:700;z-index:2}

/* Product Image Carousel */
.product-carousel{aspect-ratio:4/3}
.product-carousel__slides{display:flex;height:100%;animation:carouselSlide4 16s ease-in-out infinite}
.product-carousel__slides img{height:100%;object-fit:cover;flex-shrink:0}
.product-carousel__slides:not(.product-carousel--3){width:400%}
.product-carousel__slides:not(.product-carousel--3) img{width:25%}
.product-carousel--3{width:300%}
.product-carousel--3 img{width:33.333%}
@keyframes carouselSlide4{
  0%,22%{transform:translateX(0)}
  25%,47%{transform:translateX(-25%)}
  50%,72%{transform:translateX(-50%)}
  75%,97%{transform:translateX(-75%)}
  100%{transform:translateX(0)}
}
@keyframes carouselSlide3{
  0%,28%{transform:translateX(0)}
  33%,61%{transform:translateX(-33.333%)}
  66%,95%{transform:translateX(-66.666%)}
  100%{transform:translateX(0)}
}
.product-carousel--3{animation-name:carouselSlide3}
.product-detail__thumbs{display:flex;gap:10px}
.product-detail__thumbs img{width:85px;height:60px;object-fit:cover;border-radius:var(--rad);cursor:pointer;border:2px solid transparent;transition:border var(--tr)}
.product-detail__thumbs img:hover{border-color:var(--acc)}
.product-detail__info h3{font-size:1.6rem;font-weight:800;color:var(--pri);margin-bottom:12px}
.product-detail__desc{color:var(--txt-light);margin-bottom:24px;line-height:1.8;font-size:1rem}
.product-detail__specs-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;margin-bottom:22px;background:var(--bdr);border-radius:var(--rad-lg);overflow:hidden}
.spec-item{background:var(--wht);padding:14px 16px;text-align:center}
.spec-item__label{display:block;font-size:.75rem;color:var(--txt-light);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}
.spec-item__val{display:block;font-weight:700;font-size:.95rem;color:var(--pri)}
.product-detail__spec-img{margin:20px 0;border-radius:var(--rad-lg);overflow:hidden;box-shadow:var(--sh)}
.product-detail__spec-img img{width:100%;display:block}
.product-detail__spec-dual{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:20px 0}
.product-detail__spec-dual img{width:100%;border-radius:var(--rad);box-shadow:var(--sh)}

.product-detail__colors{margin-bottom:22px}
.product-detail__colors-label{font-weight:600;font-size:.85rem;color:var(--pri);margin-bottom:8px;display:block}
.color-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.color-dot{width:26px;height:26px;border-radius:50%;border:3px solid var(--wht);box-shadow:0 0 0 1px var(--bdr);transition:transform var(--tr);cursor:pointer}
.color-dot:hover{transform:scale(1.2)}

/* ---------- Why Cards ---------- */
.why__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.why-card{background:var(--wht);padding:36px 28px;border-radius:var(--rad-lg);border:1px solid var(--bdr);transition:all var(--tr);text-align:center}
.why-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:var(--acc)}
.why-card__icon{font-size:2.6rem;margin-bottom:16px}
.why-card h3{font-size:1.1rem;font-weight:700;color:var(--pri);margin-bottom:10px}
.why-card p{font-size:.9rem;color:var(--txt-light);line-height:1.7}

/* ---------- Accessories ---------- */
.acc__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.acc__grid .acc-card:last-child{grid-column:1/-1;max-width:300px;justify-self:center}
.acc-card{background:var(--wht);border-radius:var(--rad-lg);overflow:hidden;box-shadow:var(--sh);transition:all var(--tr);text-align:center}
.acc-card:hover{transform:translateY(-5px);box-shadow:var(--sh-lg)}
.acc-card img{width:100%;height:200px;object-fit:cover;transition:transform .5s}
.acc-card:hover img{transform:scale(1.06)}
.acc-card h4{font-size:1rem;font-weight:700;color:var(--pri);margin:16px 16px 6px;font-family:var(--font-heading)}
.acc-card p{font-size:.85rem;color:var(--txt-light);margin:0 16px 18px;line-height:1.5}

/* ---------- Comparison Table ---------- */
.table-wrap{overflow-x:auto;border-radius:var(--rad-lg);box-shadow:var(--sh-lg)}
.cmp-table{width:100%;border-collapse:collapse;font-size:.95rem}
.cmp-table th,.cmp-table td{padding:14px 18px;text-align:center;border-bottom:1px solid var(--bdr)}
.cmp-table thead th{background:var(--pri);color:var(--wht);font-weight:700}
.cmp-table thead th.is-us{background:var(--acc);font-size:1rem}
.cmp-table tbody td{background:var(--wht)}
.cmp-table tbody td.is-us{background:#FFF7EF;font-weight:700;color:var(--acc-dark)}
.cmp-table tbody tr:hover td{background:var(--bg-alt)}
.cmp-table tbody tr:hover td.is-us{background:#FFECD0}

/* ---------- Applications ---------- */
.apps__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.app-card{position:relative;border-radius:var(--rad-lg);overflow:hidden;aspect-ratio:4/3;cursor:pointer}
.app-card img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.app-card:hover img{transform:scale(1.06)}
.app-card__label{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(transparent,rgba(0,0,0,.8));color:var(--wht);padding:20px;font-weight:700;font-size:1.05rem}

/* ---------- Factory ---------- */
.factory__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.factory__card{border-radius:var(--rad-lg);overflow:hidden;position:relative}
.factory__card img{width:100%;height:240px;object-fit:cover;transition:transform .5s}
.factory__card:hover img{transform:scale(1.06)}
.factory__card span{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(transparent,rgba(0,0,0,.7));color:var(--wht);padding:16px;font-weight:600;font-size:.9rem}

/* ---------- Cases ---------- */
.cases__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.case-card{border-radius:var(--rad-lg);overflow:hidden;box-shadow:var(--sh);transition:all var(--tr);background:var(--wht)}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg)}
.case-card img{width:100%;height:200px;object-fit:cover}
.case-card__body{padding:20px}
.case-card__country{display:inline-block;font-size:.8rem;color:var(--acc);font-weight:700;margin-bottom:6px}
.case-card__body h4{font-size:1.05rem;font-weight:700;color:var(--pri);margin-bottom:4px}
.case-card__body p{font-size:.85rem;color:var(--txt-light)}

/* ---------- Certifications ---------- */
.certs__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.cert-card{text-align:center;padding:36px 20px;background:var(--wht);border-radius:var(--rad-lg);box-shadow:var(--sh);transition:transform var(--tr)}
.cert-card:hover{transform:translateY(-4px)}
.cert-card__icon{font-size:3rem;margin-bottom:12px}
.cert-card h3{font-size:1.1rem;font-weight:700;color:var(--pri);margin-bottom:4px}
.cert-card p{font-size:.9rem;color:var(--txt-light)}

/* ---------- Testimonials ---------- */
.testi__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testi-card{background:var(--wht);padding:32px 28px;border-radius:var(--rad-lg);box-shadow:var(--sh);display:flex;flex-direction:column}
.testi-card__stars{color:var(--acc);font-size:1rem;margin-bottom:14px;letter-spacing:2px}
.testi-card__text{font-size:.92rem;color:var(--txt);line-height:1.8;flex:1;margin-bottom:18px;font-style:italic}
.testi-card__author{display:flex;align-items:center;gap:12px}
.testi-card__avatar{width:40px;height:40px;border-radius:50%;background:var(--pri);color:var(--wht);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1rem;flex-shrink:0}
.testi-card__author strong{display:block;font-size:.9rem;color:var(--pri)}
.testi-card__author span{font-size:.78rem;color:var(--txt-light)}
@media(max-width:768px){.testi__grid{grid-template-columns:1fr}}

/* ---------- Order Timeline ---------- */
.order__timeline{display:flex;align-items:flex-start;justify-content:center;gap:0;max-width:1100px;margin:0 auto}
.order-step{flex:1;text-align:center;padding:0 16px}
.order-step__num{display:inline-block;width:36px;height:36px;line-height:36px;border-radius:50%;background:var(--acc);color:var(--wht);font-weight:800;font-size:.85rem;font-family:var(--font-heading);margin-bottom:12px}
.order-step__icon{font-size:2.4rem;margin-bottom:12px}
.order-step h3{font-size:1.1rem;font-weight:700;color:var(--pri);margin-bottom:8px;font-family:var(--font-heading)}
.order-step p{font-size:.88rem;color:var(--txt-light);line-height:1.7}
.order-step__arrow{font-size:1.8rem;color:var(--acc);padding-top:60px;flex-shrink:0}

@media(max-width:768px){
  .order__timeline{flex-direction:column;align-items:center;gap:0}
  .order-step__arrow{transform:rotate(90deg);padding-top:12px;padding-bottom:12px}
}

/* ---------- FAQ ---------- */
.faq__grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:960px;margin:0 auto}
.faq-item{border:1px solid var(--bdr);border-radius:var(--rad);overflow:hidden;background:var(--wht)}
.faq-item__q{width:100%;text-align:left;padding:16px 18px;background:var(--wht);font-weight:600;color:var(--pri);transition:background var(--tr);display:flex;justify-content:space-between;align-items:center;font-size:.9rem}
.faq-item__q::after{content:'▾';font-size:1.1rem;color:var(--acc);transition:transform var(--tr)}
.faq-item.active .faq-item__q::after{transform:rotate(180deg)}
.faq-item__q:hover{background:var(--bg-alt)}
.faq-item__a{max-height:0;overflow:hidden;transition:all .35s}
.faq-item.active .faq-item__a{max-height:250px}
.faq-item__a p{padding:0 18px 16px;color:var(--txt-light);font-size:.88rem;line-height:1.7}

/* ---------- CTA Banner ---------- */
.cta-banner{background:linear-gradient(135deg,var(--acc),var(--pri));color:var(--wht);padding:48px 0}
.cta-banner__inner{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.cta-banner__inner h2{font-size:1.6rem;font-weight:800;margin-bottom:6px}
.cta-banner__inner p{opacity:.85;font-size:1.05rem}
.cta-banner__actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- Contact ---------- */
.contact__grid{display:grid;grid-template-columns:1.3fr 1fr;gap:48px;align-items:start}
.contact__form{background:var(--wht);padding:40px;border-radius:var(--rad-lg);box-shadow:var(--sh-lg)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-weight:600;color:var(--pri);margin-bottom:6px;font-size:.9rem}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 14px;border:2px solid var(--bdr);border-radius:var(--rad);font-size:.95rem;transition:border var(--tr);background:var(--bg-alt);outline:none}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--acc);background:var(--wht)}
.form-group textarea{resize:vertical;min-height:100px}
.contact__sidebar{display:flex;flex-direction:column;gap:18px}
.contact-card{display:flex;align-items:flex-start;gap:16px;padding:22px;background:var(--wht);border-radius:var(--rad-lg);box-shadow:var(--sh);border:1px solid var(--bdr)}
.contact-card__icon{font-size:1.8rem;flex-shrink:0}
.contact-card h4{font-size:.95rem;color:var(--pri);margin-bottom:2px}
.contact-card p{font-size:.9rem;color:var(--txt-light)}
.contact-card a{color:var(--acc);font-weight:600}

/* ---------- Trust Stats Float ---------- */
.trust-float{position:fixed;bottom:150px;right:24px;z-index:996;display:flex;flex-direction:column;gap:6px;align-items:flex-end}
.trust-float__item{background:rgba(13,33,55,.92);color:var(--wht);padding:8px 16px;border-radius:20px;font-size:.78rem;font-weight:500;white-space:nowrap;backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.08);opacity:0;transform:translateX(10px);position:absolute;right:0;bottom:0;transition:opacity .5s,transform .5s;pointer-events:none}
.trust-float__item.active{opacity:1;transform:translateX(0);position:relative}

/* ---------- WhatsApp Float ---------- */
.whatsapp-float{position:fixed;bottom:90px;right:24px;background:#25D366;color:var(--wht);display:flex;align-items:center;gap:8px;padding:12px 18px;border-radius:50px;font-weight:700;font-size:.9rem;box-shadow:0 4px 20px rgba(37,211,102,.4);z-index:998;transition:all var(--tr)}
.whatsapp-float:hover{transform:translateY(-3px);box-shadow:0 6px 28px rgba(37,211,102,.5)}
.whatsapp-float__text{white-space:nowrap}

/* ---------- Back to Top ---------- */
.back-to-top{position:fixed;bottom:30px;right:24px;width:44px;height:44px;background:var(--pri);color:var(--wht);border-radius:50%;font-size:1.2rem;font-weight:700;box-shadow:var(--sh);z-index:997;opacity:0;visibility:hidden;transform:translateY(8px);transition:all var(--tr);display:flex;align-items:center;justify-content:center}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--acc);transform:translateY(-3px)}

/* ---------- Footer ---------- */
.footer{background:var(--pri-dark);color:var(--txt-on-dark);padding:56px 0 0}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:40px}
.footer__col--brand h3{font-size:1.4rem;font-weight:800;color:var(--wht);margin-bottom:14px}
.footer__col p{opacity:.75;font-size:.9rem;line-height:1.8}
.footer__social{display:flex;gap:10px;margin-top:16px}
.footer__social a{width:38px;height:38px;background:rgba(255,255,255,.08);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1rem;transition:all var(--tr)}
.footer__social a:hover{background:var(--acc);transform:translateY(-2px)}
.footer__col h4{color:var(--wht);font-size:1rem;margin-bottom:14px}
.footer__col ul li{margin-bottom:8px}
.footer__col ul a,.footer__col p a{opacity:.7;font-size:.9rem;transition:all var(--tr)}
.footer__col ul a:hover,.footer__col p a:hover{opacity:1;color:var(--acc-light)}
.footer__bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:.85rem;opacity:.5}

/* ---------- Fade In ---------- */
.fade-in{opacity:0;transform:translateY(30px);transition:opacity .7s,transform .7s}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* ---------- Form Success ---------- */
.form-success{display:none;text-align:center;padding:80px 40px}
.form-success.show{display:block}
.form-success__icon{font-size:4rem;margin-bottom:16px}
.form-success h3{color:var(--pri);font-size:1.5rem;margin-bottom:8px}
.form-success p{color:var(--txt-light)}

/* ==================== RESPONSIVE ==================== */
@media(max-width:1024px){
  .why__grid{grid-template-columns:repeat(2,1fr)}
  .cases__grid,.factory__grid{grid-template-columns:repeat(2,1fr)}
  .acc__grid{grid-template-columns:repeat(3,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr}
  .about-strip__grid,.product-detail,.contact__grid{grid-template-columns:1fr}
  .product-detail--reverse .product-detail__gallery,.product-detail--reverse .product-detail__info{direction:ltr}
  .product-detail__specs-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:768px){
  .section{padding:60px 0}
  .topbar{display:none}
  .header__nav{position:fixed;top:var(--head-h);left:0;right:0;bottom:0;background:var(--wht);padding:20px;transform:translateX(100%);transition:transform .35s;z-index:999}
  .header__nav.active{transform:translateX(0)}
  .header__nav-list{flex-direction:column}
  .header__nav-link{padding:14px 16px;font-size:1.05rem;border-bottom:1px solid var(--bdr)}
  .header__cta-btn{display:none}
  .header__menu-btn{display:flex}
  .why__grid,.apps__grid,.cases__grid,.factory__grid,.certs__grid,.acc__grid{grid-template-columns:1fr}
  .apps__grid{grid-template-columns:repeat(2,1fr)}
  .faq__grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .contact__form{padding:24px}
  .hero__title{font-size:1.8rem}
  .hero__trust{flex-direction:column;align-items:center;gap:8px}
  .hero__stats{grid-template-columns:repeat(2,1fr)}
  .cta-banner__inner{flex-direction:column;text-align:center}
  .about-strip__list{grid-template-columns:1fr}
  .product-detail__specs-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:480px){
  .hero__cta{flex-direction:column}
  .hero__stat-num{font-size:1.5rem}
  .section__title{font-size:1.5rem}
  .product-detail__specs-grid{grid-template-columns:1fr 1fr}
}