/* ===== Biến & Reset ===== */
:root{
  --green:#1f9d55;
  --green-dark:#177a42;
  --green-light:#e8f6ee;
  --ink:#1d2b24;
  --muted:#5d6b63;
  --line:#e4ebe6;
  --bg:#ffffff;
  --bg-alt:#f5f9f6;
  --dark:#13241c;
  --radius:14px;
  --shadow:0 10px 30px rgba(20,60,40,.08);
  --shadow-lg:0 18px 50px rgba(20,60,40,.14);
  --max:1160px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Be Vietnam Pro',system-ui,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}

/* ===== Topbar ===== */
.topbar{background:var(--green-dark);color:#fff;font-size:13.5px}
.topbar__inner{display:flex;justify-content:space-between;align-items:center;gap:12px;height:38px}
.topbar__tag{opacity:.95}
.topbar__hotline{font-weight:600}
@media(max-width:680px){.topbar__tag{display:none}.topbar__inner{justify-content:center}}

/* ===== Header ===== */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:12px}
.brand__logo{height:46px;width:auto;display:block}
.footer__brand .brand__logo{height:42px;background:#fff;padding:6px 10px;border-radius:10px}
.brand__text{display:flex;flex-direction:column;line-height:1.1}
.brand__text strong{font-size:18px}
.brand__text small{color:var(--muted);font-size:12px}

.nav{display:flex;align-items:center;gap:6px}
.nav a{padding:9px 14px;border-radius:9px;font-weight:500;color:var(--ink);transition:.2s}
.nav a:hover{background:var(--green-light);color:var(--green-dark)}
.nav__cta{background:var(--green);color:#fff!important}
.nav__cta:hover{background:var(--green-dark)!important;color:#fff!important}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2.5px;background:var(--ink);border-radius:2px;transition:.25s}
.nav-toggle.active span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

@media(max-width:880px){
  .nav-toggle{display:flex}
  .nav{position:absolute;top:70px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:#fff;border-bottom:1px solid var(--line);padding:10px 20px 18px;gap:2px;
    box-shadow:var(--shadow);transform:translateY(-12px);opacity:0;pointer-events:none;transition:.25s}
  .nav.open{transform:none;opacity:1;pointer-events:auto}
  .nav a{padding:13px 14px}
}

/* ===== Buttons ===== */
.btn{display:inline-block;padding:13px 24px;border-radius:11px;font-weight:600;
  border:1.5px solid transparent;cursor:pointer;transition:.2s;font-size:15px;font-family:inherit}
.btn--primary{background:var(--green);color:#fff}
.btn--primary:hover{background:var(--green-dark);transform:translateY(-1px)}
.btn--ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn--ghost:hover{border-color:var(--green);color:var(--green-dark)}
.btn--zalo{background:#0068ff;color:#fff}
.btn--zalo:hover{background:#0055d4;transform:translateY(-1px)}
.btn--block{width:100%}

/* ===== Hero ===== */
.hero{position:relative;padding:64px 0 72px;overflow:hidden;
  background:radial-gradient(1100px 460px at 12% -10%,var(--green-light),transparent),var(--bg)}
.hero::before{content:"";position:absolute;inset:0;background-image:var(--hero-img);
  background-size:cover;background-position:center;opacity:.12;z-index:0}
.hero .container{position:relative;z-index:1}
.hero__inner{display:grid;grid-template-columns:1.25fr .95fr;gap:48px;align-items:center}
.hero__eyebrow{display:inline-block;background:var(--green-light);color:var(--green-dark);
  font-weight:600;font-size:13.5px;padding:6px 14px;border-radius:30px;margin-bottom:18px}
.hero h1{font-size:clamp(30px,4.4vw,48px);line-height:1.12;letter-spacing:-.5px;margin-bottom:18px}
.hero__desc{color:var(--muted);font-size:17px;max-width:540px;margin-bottom:26px}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.hero__stats{display:flex;gap:34px;list-style:none;flex-wrap:wrap}
.hero__stats li{display:flex;flex-direction:column}
.hero__stats strong{font-size:30px;color:var(--green-dark);line-height:1}
.hero__stats span{color:var(--muted);font-size:14px;margin-top:4px}

.hero__card{background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:28px;box-shadow:var(--shadow-lg)}
.hero__card h3{font-size:21px;margin-bottom:6px}
.hero__card>p{color:var(--muted);font-size:14.5px;margin-bottom:18px}
.hero__card form{display:flex;flex-direction:column;gap:12px}

input,select,textarea{width:100%;padding:13px 15px;border:1.5px solid var(--line);
  border-radius:11px;font-size:15px;font-family:inherit;color:var(--ink);background:#fff;transition:.2s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--green);
  box-shadow:0 0 0 3px rgba(31,157,85,.12)}
textarea{resize:vertical}

@media(max-width:880px){.hero__inner{grid-template-columns:1fr;gap:34px}}

/* ===== Section ===== */
.section{padding:74px 0}
.section--alt{background:var(--bg-alt)}
.section--dark{background:var(--dark);color:#fff}
.section__head{max-width:660px;margin:0 auto 44px;text-align:center}
.section__head h2{font-size:clamp(26px,3.4vw,36px);letter-spacing:-.4px;margin-bottom:12px}
.section__head p{color:var(--muted);font-size:16.5px}
.section__head--left{margin:0 0 22px;text-align:left}
.section__head--light h2{color:#fff}
.section__head--light p{color:#b9cabf}

/* ===== Catalog ===== */
.cat-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.cat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 18px;text-align:center;transition:.2s;box-shadow:var(--shadow)}
.cat-card:hover{transform:translateY(-4px);border-color:var(--green);box-shadow:var(--shadow-lg)}
.cat-card__ico{font-size:34px;display:block;margin-bottom:12px}
.cat-card h3{font-size:15.5px}
@media(max-width:980px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.cat-grid{grid-template-columns:1fr}}

/* ===== About ===== */
.about{display:grid;grid-template-columns:.95fr 1.05fr;gap:48px;align-items:center}
.about__media{position:relative;border-radius:18px;box-shadow:var(--shadow-lg);overflow:hidden}
.about__media img{width:100%;height:100%;min-height:320px;object-fit:cover;display:block}
.about__badge{position:absolute;bottom:20px;left:20px;background:#fff;border-radius:12px;
  padding:14px 18px;box-shadow:var(--shadow);display:flex;flex-direction:column;line-height:1.2}
.about__badge strong{color:var(--green-dark);font-size:22px}
.about__badge span{font-size:12.5px;color:var(--muted)}
.about__content p{color:var(--muted);margin-bottom:14px;font-size:16px}
.about__content strong{color:var(--ink)}
.check-list{list-style:none;margin-top:18px;display:flex;flex-direction:column;gap:11px}
.check-list li{position:relative;padding-left:32px;color:var(--ink)}
.check-list li::before{content:"✓";position:absolute;left:0;top:1px;width:22px;height:22px;
  background:var(--green-light);color:var(--green-dark);border-radius:50%;
  display:grid;place-items:center;font-weight:700;font-size:13px}
@media(max-width:880px){.about{grid-template-columns:1fr;gap:30px}.about__media{min-height:240px}}

/* ===== Products ===== */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.prod-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:.2s;box-shadow:var(--shadow)}
.prod-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.prod-card__img{height:190px;overflow:hidden;background:var(--green-light)}
.prod-card__img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.prod-card:hover .prod-card__img img{transform:scale(1.06)}
.prod-card__body{padding:20px}
.prod-card__body h3{font-size:17.5px;margin-bottom:8px}
.prod-card__body p{color:var(--muted);font-size:14.5px;margin-bottom:14px}
.prod-card__link{color:var(--green-dark);font-weight:600;font-size:14.5px}
.prod-card__link:hover{text-decoration:underline}
@media(max-width:980px){.prod-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.prod-grid{grid-template-columns:1fr}}

/* ===== Feature banner (landing chủ lực) ===== */
.feature-banner{display:grid;grid-template-columns:1.05fr 1.25fr;gap:0;margin-bottom:30px;
  background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;
  box-shadow:var(--shadow);transition:.25s}
.feature-banner:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.feature-banner__media{overflow:hidden;min-height:230px}
.feature-banner__media img{width:100%;height:100%;object-fit:cover;display:block;transition:.4s}
.feature-banner:hover .feature-banner__media img{transform:scale(1.05)}
.feature-banner__body{padding:30px 34px;display:flex;flex-direction:column;justify-content:center}
.feature-banner__tag{align-self:flex-start;background:var(--green);color:#fff;font-weight:600;
  font-size:13px;padding:5px 14px;border-radius:30px;margin-bottom:14px}
.feature-banner__body h3{font-size:clamp(20px,2.4vw,26px);line-height:1.25;margin-bottom:10px}
.feature-banner__body p{color:var(--muted);font-size:15.5px;margin-bottom:18px}
.feature-banner__cta{align-self:flex-start;background:var(--green);color:#fff;font-weight:600;
  padding:11px 22px;border-radius:11px;font-size:15px;transition:.2s}
.feature-banner:hover .feature-banner__cta{background:var(--green-dark)}
@media(max-width:760px){
  .feature-banner{grid-template-columns:1fr}
  .feature-banner__media{min-height:200px}
}

/* ===== Why ===== */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.why-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);padding:28px 24px;transition:.2s}
.why-card:hover{background:rgba(255,255,255,.09);transform:translateY(-4px)}
.why-card__num{display:inline-block;font-size:30px;font-weight:800;color:var(--green);margin-bottom:14px}
.why-card h3{font-size:18px;margin-bottom:10px}
.why-card p{color:#b9cabf;font-size:14.5px}
@media(max-width:980px){.why-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.why-grid{grid-template-columns:1fr}}

/* ===== Cases ===== */
.case-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:.2s;margin:0}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.case-card img{width:100%;height:170px;object-fit:cover;display:block;transition:.4s}
.case-card:hover img{transform:scale(1.05)}
.case-card figcaption{padding:16px 18px}
.case-card__loc{display:inline-block;font-size:12.5px;color:var(--green-dark);font-weight:600;
  background:var(--green-light);padding:4px 11px;border-radius:20px;margin-bottom:10px}
.case-card h3{font-size:15.5px}
@media(max-width:980px){.case-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.case-grid{grid-template-columns:1fr}}

/* ===== News ===== */
.news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);transition:.2s}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.news-card time{font-size:13px;color:var(--green-dark);font-weight:600}
.news-card h3{font-size:17px;margin:10px 0;line-height:1.35}
.news-card p{color:var(--muted);font-size:14.5px}
@media(max-width:980px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.news-grid{grid-template-columns:1fr}}

/* ===== Contact ===== */
.contact{display:grid;grid-template-columns:1fr 1.1fr;gap:44px;align-items:start}
.contact__list{list-style:none;display:flex;flex-direction:column;gap:20px;margin-top:6px}
.contact__list li{display:flex;gap:16px;align-items:flex-start}
.contact__list span{width:44px;height:44px;flex:0 0 44px;background:var(--green-light);
  color:var(--green-dark);border-radius:12px;display:grid;place-items:center;font-size:20px}
.contact__list strong{display:block;font-size:14px;color:var(--muted);font-weight:600;margin-bottom:2px}
.contact__list a,.contact__list p{font-size:16.5px;color:var(--ink);font-weight:500}
.contact__form{background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:30px;box-shadow:var(--shadow-lg)}
.contact__form h3{font-size:21px;margin-bottom:18px}
.contact__form form{display:flex;flex-direction:column;gap:13px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:13px}
@media(max-width:880px){.contact{grid-template-columns:1fr;gap:30px}}
@media(max-width:460px){.form-row{grid-template-columns:1fr}}

/* ===== Footer ===== */
.footer{background:var(--dark);color:#cdd9d1;padding:54px 0 0}
.footer__inner{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
.footer__brand .brand__logo{margin-bottom:12px}
.footer__brand strong{display:block;color:#fff;font-size:18px;margin-bottom:8px}
.footer__brand p{font-size:14px;max-width:260px}
.footer__col h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer__col a,.footer__col p{display:block;color:#cdd9d1;font-size:14.5px;margin-bottom:9px;transition:.2s}
.footer__col a:hover{color:var(--green)}
.footer__bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:44px;padding:20px 0;
  font-size:13.5px;color:#9fb0a6;text-align:center}
@media(max-width:780px){.footer__inner{grid-template-columns:1fr 1fr}}
@media(max-width:460px){.footer__inner{grid-template-columns:1fr}}

/* ===== FAB ===== */
.fab{position:fixed;right:20px;bottom:24px;width:56px;height:56px;border-radius:50%;
  background:var(--green);color:#fff;display:grid;place-items:center;font-size:24px;
  box-shadow:var(--shadow-lg);z-index:60;animation:pulse 2s infinite}
.fab:hover{background:var(--green-dark)}
.fab--zalo{bottom:90px;background:#0068ff;font-size:14px;font-weight:700;letter-spacing:.3px;
  animation:pulse-blue 2s infinite}
.fab--zalo:hover{background:#0055d4}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(31,157,85,.5)}70%{box-shadow:0 0 0 16px rgba(31,157,85,0)}100%{box-shadow:0 0 0 0 rgba(31,157,85,0)}}
@keyframes pulse-blue{0%{box-shadow:0 0 0 0 rgba(0,104,255,.5)}70%{box-shadow:0 0 0 16px rgba(0,104,255,0)}100%{box-shadow:0 0 0 0 rgba(0,104,255,0)}}

/* ===== Phụ: gợi ý form liên hệ ===== */
.contact__hint{color:var(--muted);font-size:13.5px;margin:-8px 0 14px}

/* ===== Trang chi tiết sản phẩm ===== */
.breadcrumb{background:var(--bg-alt);border-bottom:1px solid var(--line);font-size:14px}
.breadcrumb .container{padding-top:14px;padding-bottom:14px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--green-dark)}
.breadcrumb span{color:#b6c2bb}
.breadcrumb strong{color:var(--ink)}

.pd{padding:40px 0 70px}
.pd__top{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start;margin-bottom:50px}
.pd__main{border-radius:16px;overflow:hidden;box-shadow:var(--shadow-lg);background:var(--green-light)}
.pd__main img{width:100%;height:400px;object-fit:cover;display:block}
.pd__thumbs{display:flex;gap:12px;margin-top:14px}
.thumb{flex:1;border:2px solid var(--line);border-radius:10px;overflow:hidden;cursor:pointer;
  padding:0;background:none;height:80px;transition:.2s}
.thumb img{width:100%;height:100%;object-fit:cover;display:block}
.thumb.active{border-color:var(--green)}

.pd__icon{font-size:42px;display:block;margin-bottom:6px}
.pd__info h1{font-size:clamp(26px,3.4vw,36px);letter-spacing:-.4px;margin-bottom:12px}
.pd__tagline{color:var(--muted);font-size:17px;margin-bottom:20px}
.pd__apps{margin-bottom:24px;font-size:15px}
.pd__apps .tag{display:inline-block;background:var(--green-light);color:var(--green-dark);
  font-size:13.5px;font-weight:600;padding:5px 13px;border-radius:20px;margin:4px 6px 0 0}
.pd__cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.pd__quote{color:var(--green-dark);font-weight:600;font-size:15px}
.pd__quote:hover{text-decoration:underline}

.pd__body{display:grid;grid-template-columns:1.6fr 1fr;gap:44px;align-items:start}
.pd__desc h2{font-size:23px;margin:0 0 14px}
.pd__desc h2:not(:first-child){margin-top:30px}
.pd__desc p{color:var(--muted);font-size:16px;margin-bottom:14px}
.pd__specs{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;
  box-shadow:var(--shadow);position:sticky;top:90px}
.pd__specs h3{font-size:19px;margin-bottom:16px}
.pd__specs table{width:100%;border-collapse:collapse}
.pd__specs th,.pd__specs td{text-align:left;padding:11px 0;border-bottom:1px solid var(--line);
  font-size:14.5px;vertical-align:top}
.pd__specs th{color:var(--muted);font-weight:600;width:42%;padding-right:12px}
.pd__specs td{color:var(--ink)}
.pd__note{font-size:13px;color:var(--muted);margin:14px 0 18px}

@media(max-width:880px){
  .pd__top{grid-template-columns:1fr;gap:24px}
  .pd__main img{height:300px}
  .pd__body{grid-template-columns:1fr;gap:30px}
  .pd__specs{position:static}
}

/* Sản phẩm liên quan */
.rel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.rel-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:.2s}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.rel-card__img{height:140px;background-size:cover;background-position:center}
.rel-card__body{padding:14px 16px;display:flex;align-items:center;gap:10px}
.rel-card__body span{font-size:22px}
.rel-card__body h4{font-size:15px}
@media(max-width:980px){.rel-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.rel-grid{grid-template-columns:1fr}}

/* ===== Reveal animation ===== */
.section__head,.cat-card,.prod-card,.why-card,.case-card,.news-card,.about__content,.about__media{
  opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.is-visible{opacity:1!important;transform:none!important}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important}
  .section__head,.cat-card,.prod-card,.why-card,.case-card,.news-card,.about__content,.about__media{opacity:1;transform:none}
}