/* ===== YuanVitality — premium tea-house B2B theme ===== */
:root{
  --green-900:#10271e; --green-800:#163024; --green-700:#1c3d2e; --green-600:#24503c;
  --green-500:#2f6249; --green-400:#3f7a5d; --green-300:#6fa389;
  --gold-600:#a9842f; --gold-500:#c2a14e; --gold-400:#d4b86e; --gold-200:#e7d6a6;
  --cream:#f7f3ea; --cream-2:#efe8d8; --paper:#fffdf8;
  --ink:#22281f; --ink-soft:#4c5346; --muted:#7b8273; --line:#e3dccb;
  --shadow-sm:0 2px 10px rgba(20,40,30,.06);
  --shadow:0 14px 40px rgba(20,40,30,.12);
  --shadow-lg:0 30px 80px rgba(15,35,25,.28);
  --radius:16px; --radius-lg:24px;
  --serif:"Playfair Display","Noto Serif SC",Georgia,"Songti SC","Times New Roman",serif;
  --sans:"Inter","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:var(--sans);color:var(--ink);background:var(--cream);line-height:1.6;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.18;color:var(--green-800)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{font-family:var(--sans);font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;color:var(--gold-600);font-weight:600}
.section{padding:84px 0}
.section.alt{background:var(--paper)}
.section-head{text-align:center;max-width:720px;margin:0 auto 48px}
.section-head h2{font-size:2.3rem;margin:10px 0 12px}
.section-head p{color:var(--ink-soft);font-size:1.05rem}
.gold-rule{width:64px;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--gold-400),var(--gold-600));margin:14px auto 0}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.5em;font-family:var(--sans);font-weight:600;font-size:.95rem;
  padding:13px 24px;border-radius:999px;border:1px solid transparent;cursor:pointer;transition:.25s;white-space:nowrap}
.btn-gold{background:linear-gradient(135deg,var(--gold-500),var(--gold-600));color:#241a05;box-shadow:0 8px 22px rgba(169,132,47,.32)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(169,132,47,.42)}
.btn-green{background:var(--green-700);color:#fff}
.btn-green:hover{background:var(--green-600);transform:translateY(-2px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.4);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--green-700)}
.btn-outline:hover{border-color:var(--gold-500);color:var(--gold-600)}

/* ===== Top bar ===== */
.topbar{background:var(--green-900);color:#d9e3da;font-size:.82rem}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:38px;gap:16px}
.topbar a{color:#d9e3da;opacity:.85}.topbar a:hover{opacity:1;color:var(--gold-300,#d4b86e)}
.topbar .tb-contact{display:flex;gap:18px;align-items:center}
.langs{display:flex;gap:4px;align-items:center}
.lang-btn{background:transparent;border:1px solid transparent;color:#cdd8cd;font-family:var(--sans);font-size:.8rem;
  padding:3px 9px;border-radius:999px;cursor:pointer;transition:.2s}
.lang-btn:hover{color:#fff}
.lang-btn.active{background:var(--gold-500);color:#241a05;font-weight:700}

/* ===== Header ===== */
.header{position:sticky;top:0;z-index:50;background:rgba(247,243,234,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);transition:.3s}
.header.scrolled{box-shadow:var(--shadow-sm);background:rgba(255,253,248,.96)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:70px;gap:20px}
.brand{display:flex;align-items:center;gap:11px}
.brand .mark{width:38px;height:38px;flex:none}
.brand .name{font-family:var(--serif);font-size:1.45rem;font-weight:700;color:var(--green-800);letter-spacing:.01em}
.brand .name b{color:var(--gold-600);font-weight:700}
.nav{display:flex;gap:30px;align-items:center}
.nav a{font-size:.95rem;font-weight:500;color:var(--ink-soft);position:relative;padding:6px 0}
.nav a:hover{color:var(--green-700)}
.nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--gold-500);transition:.25s}
.nav a:hover::after{width:100%}
.header-cta{display:flex;align-items:center;gap:12px}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:6px}
.menu-toggle span{display:block;width:24px;height:2px;background:var(--green-800);margin:5px 0;transition:.3s}

/* ===== Hero ===== */
.hero{position:relative;color:#f4efe2;overflow:hidden;
  background:radial-gradient(1200px 600px at 80% -10%,var(--green-600),var(--green-900))}
.hero::before{content:"";position:absolute;inset:0;
  background-image:radial-gradient(circle at 18% 30%,rgba(212,184,110,.10),transparent 40%),
   radial-gradient(circle at 90% 80%,rgba(111,163,137,.16),transparent 45%);pointer-events:none}
.hero .container{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
  padding-top:84px;padding-bottom:90px}
.hero-eyebrow{color:var(--gold-300,#e7d6a6);background:rgba(212,184,110,.12);border:1px solid rgba(212,184,110,.3);
  display:inline-block;padding:7px 16px;border-radius:999px;font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;font-weight:600}
.hero h1{color:#fff;font-size:3.05rem;margin:22px 0 18px;line-height:1.12}
.hero p.sub{font-size:1.12rem;color:#d8e2d6;max-width:560px}
.hero-actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.hero-stats{display:flex;gap:30px;margin-top:38px;flex-wrap:wrap}
.hero-stats .s b{font-family:var(--serif);font-size:1.9rem;color:var(--gold-300,#e7d6a6);display:block}
.hero-stats .s span{font-size:.82rem;color:#b9c7ba;letter-spacing:.04em}
/* hero collage */
.hero-art{position:relative;height:430px}
.hero-art .card{position:absolute;border-radius:20px;overflow:hidden;box-shadow:var(--shadow-lg);border:4px solid rgba(255,255,255,.9)}
.hero-art .card img{width:100%;height:100%;object-fit:cover}
.hero-art .c1{width:60%;height:78%;top:0;right:6%;z-index:2}
.hero-art .c2{width:46%;height:54%;bottom:0;left:0;z-index:3}
.hero-art .c3{width:34%;height:40%;top:14%;left:8%;z-index:1;opacity:.96}
.hero-art .badge{position:absolute;z-index:4;right:0;bottom:8%;background:var(--paper);color:var(--green-800);
  border-radius:14px;padding:12px 16px;box-shadow:var(--shadow);font-size:.8rem;max-width:170px}
.hero-art .badge b{display:block;font-family:var(--serif);color:var(--gold-600);font-size:1.5rem;line-height:1}

/* ===== Category strip ===== */
.cats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.cat-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  cursor:pointer;transition:.28s;display:flex;flex-direction:column}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--gold-200)}
.cat-card .ph{height:150px;overflow:hidden;background:var(--cream-2)}
.cat-card .ph img{width:100%;height:100%;object-fit:cover;transition:.4s}
.cat-card:hover .ph img{transform:scale(1.06)}
.cat-card .body{padding:18px 20px 22px}
.cat-card h3{font-size:1.22rem;margin-bottom:6px}
.cat-card p{font-size:.88rem;color:var(--ink-soft)}
.cat-card .more{margin-top:12px;font-size:.82rem;font-weight:600;color:var(--gold-600);letter-spacing:.03em}

/* ===== Why / values ===== */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.why-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;text-align:center;transition:.25s}
.why-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.why-card .ic{width:58px;height:58px;border-radius:14px;margin:0 auto 16px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--green-600),var(--green-800));color:var(--gold-300,#e7d6a6)}
.why-card .ic svg{width:28px;height:28px}
.why-card h3{font-size:1.12rem;margin-bottom:8px}
.why-card p{font-size:.9rem;color:var(--ink-soft)}

/* ===== Catalog ===== */
.catalog-tools{display:flex;flex-direction:column;gap:18px;align-items:center;margin-bottom:34px}
.search-wrap{position:relative;width:min(440px,100%)}
.search-wrap input{width:100%;padding:13px 18px 13px 44px;border:1px solid var(--line);border-radius:999px;
  font-family:var(--sans);font-size:.95rem;background:var(--paper);transition:.2s}
.search-wrap input:focus{outline:none;border-color:var(--gold-500);box-shadow:0 0 0 4px rgba(194,161,78,.14)}
.search-wrap svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--muted)}
.filters{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.chip{background:var(--paper);border:1px solid var(--line);color:var(--ink-soft);font-family:var(--sans);
  font-size:.9rem;font-weight:500;padding:9px 18px;border-radius:999px;cursor:pointer;transition:.2s}
.chip:hover{border-color:var(--gold-400);color:var(--green-700)}
.chip.active{background:var(--green-700);border-color:var(--green-700);color:#fff}
.count{text-align:center;color:var(--muted);font-size:.86rem;margin-bottom:24px}
.count b{color:var(--green-700)}

.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;cursor:pointer;transition:.26s;opacity:0;transform:translateY(14px)}
.card.in{opacity:1;transform:none}
.card:hover{transform:translateY(-7px);box-shadow:var(--shadow);border-color:var(--gold-200)}
.card .imgwrap{position:relative;aspect-ratio:1/1;overflow:hidden;background:#fff}
.card .imgwrap img{width:100%;height:100%;object-fit:cover;transition:.45s}
.card:hover .imgwrap img{transform:scale(1.05)}
.card .tag{position:absolute;top:12px;left:12px;background:rgba(16,39,30,.86);color:var(--gold-200);
  font-size:.68rem;letter-spacing:.06em;text-transform:uppercase;font-weight:600;padding:5px 11px;border-radius:999px;backdrop-filter:blur(4px)}
.card .body{padding:16px 18px 20px;display:flex;flex-direction:column;flex:1}
.card h3{font-size:1.08rem;line-height:1.25;margin-bottom:8px;color:var(--green-800)}
.card .specs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.card .specs span{font-size:.7rem;background:var(--cream-2);color:var(--ink-soft);padding:3px 9px;border-radius:6px}
.card p.d{font-size:.84rem;color:var(--ink-soft);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card .view{margin-top:14px;font-size:.84rem;font-weight:600;color:var(--gold-600);display:flex;align-items:center;gap:6px}
.card .view svg{width:15px;height:15px;transition:.2s}
.card:hover .view svg{transform:translateX(3px)}
.empty{grid-column:1/-1;text-align:center;color:var(--muted);padding:60px 0;font-size:1rem}

/* ===== Capabilities band ===== */
.capband{background:linear-gradient(135deg,var(--green-800),var(--green-900));color:#eef3ec}
.capband .container{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:54px 24px;text-align:center}
.capband .k{font-family:var(--serif);font-size:2.6rem;color:var(--gold-300,#e7d6a6);line-height:1}
.capband .v{font-size:.92rem;color:#bccabc;margin-top:8px;letter-spacing:.03em}

/* ===== About ===== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-grid .txt h2{font-size:2.1rem;margin:10px 0 18px}
.about-grid .txt p{color:var(--ink-soft);font-size:1.04rem}
.about-art{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);aspect-ratio:4/3;border:5px solid #fff}
.about-art img{width:100%;height:100%;object-fit:cover}
.about-art .stamp{position:absolute;left:18px;bottom:18px;background:rgba(16,39,30,.82);color:var(--gold-200);
  padding:10px 16px;border-radius:12px;font-size:.82rem;backdrop-filter:blur(4px)}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact-info .ci{display:flex;gap:14px;align-items:flex-start;padding:16px 0;border-bottom:1px dashed var(--line)}
.contact-info .ci:last-child{border-bottom:none}
.contact-info .ci .ic{width:42px;height:42px;border-radius:11px;flex:none;display:grid;place-items:center;
  background:var(--green-700);color:var(--gold-300,#e7d6a6)}
.contact-info .ci .ic svg{width:20px;height:20px}
.contact-info .ci .lbl{font-size:.74rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}
.contact-info .ci .val{font-size:1rem;color:var(--ink);font-weight:500}
.form{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow-sm)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form .field{margin-bottom:14px}
.form label{display:block;font-size:.82rem;color:var(--ink-soft);margin-bottom:6px;font-weight:500}
.form input,.form textarea{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:10px;
  font-family:var(--sans);font-size:.94rem;background:#fff;transition:.2s}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--gold-500);box-shadow:0 0 0 4px rgba(194,161,78,.13)}
.form textarea{min-height:120px;resize:vertical}
.form .note{font-size:.78rem;color:var(--muted);margin-top:10px}

/* ===== Footer ===== */
.footer{background:var(--green-900);color:#aebcae;padding:60px 0 26px;font-size:.9rem}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer h4{color:#fff;font-family:var(--sans);font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:16px}
.footer .brand .name{color:#fff}.footer .brand .name b{color:var(--gold-400)}
.footer .fdesc{margin-top:14px;color:#9fae9f;max-width:300px;font-size:.86rem}
.footer ul{list-style:none}
.footer ul li{margin-bottom:9px}
.footer ul li a:hover{color:var(--gold-300,#e7d6a6)}
.footer .disc{font-size:.76rem;color:#7f8d7f;margin-top:22px;line-height:1.6}
.footer .copy{margin-top:18px;font-size:.8rem;color:#8b998b;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* ===== Modal ===== */
.modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:24px}
.modal.open{display:flex}
.modal-bg{position:absolute;inset:0;background:rgba(10,24,18,.66);backdrop-filter:blur(4px)}
.modal-box{position:relative;background:var(--paper);border-radius:var(--radius-lg);max-width:920px;width:100%;
  max-height:90vh;overflow:auto;box-shadow:var(--shadow-lg);display:grid;grid-template-columns:1fr 1fr;animation:pop .3s ease}
@keyframes pop{from{opacity:0;transform:translateY(18px) scale(.98)}to{opacity:1;transform:none}}
.modal-close{position:absolute;top:14px;right:14px;z-index:5;width:38px;height:38px;border-radius:50%;border:none;
  background:rgba(255,255,255,.9);cursor:pointer;font-size:1.3rem;color:var(--green-800);box-shadow:var(--shadow-sm);transition:.2s}
.modal-close:hover{background:var(--gold-500);color:#fff;transform:rotate(90deg)}
.modal-gallery{padding:22px}
.modal-main{aspect-ratio:1/1;border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--line)}
.modal-main img{width:100%;height:100%;object-fit:cover}
.modal-thumbs{display:flex;gap:10px;margin-top:12px}
.modal-thumbs button{flex:1;aspect-ratio:1/1;border-radius:10px;overflow:hidden;border:2px solid transparent;cursor:pointer;background:#fff;padding:0}
.modal-thumbs button.active{border-color:var(--gold-500)}
.modal-thumbs img{width:100%;height:100%;object-fit:cover}
.modal-info{padding:30px 30px 30px 6px}
.modal-info .tag{display:inline-block;background:var(--green-700);color:var(--gold-200);font-size:.7rem;
  letter-spacing:.08em;text-transform:uppercase;font-weight:600;padding:5px 12px;border-radius:999px;margin-bottom:12px}
.modal-info h3{font-size:1.7rem;margin-bottom:14px;color:var(--green-800)}
.modal-info .desc{color:var(--ink-soft);font-size:1rem;margin-bottom:20px}
.modal-info .spectable{border-top:1px solid var(--line);margin-bottom:22px}
.modal-info .spectable .r{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px solid var(--line);font-size:.92rem}
.modal-info .spectable .r .k{color:var(--muted)}
.modal-info .spectable .r .v{color:var(--ink);font-weight:500;text-align:right}

/* ===== reveal ===== */
.reveal{opacity:0;transform:translateY(24px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ===== responsive ===== */
@media(max-width:1024px){
  .cats,.why-grid,.grid{grid-template-columns:repeat(2,1fr)}
  .capband .container{grid-template-columns:repeat(2,1fr);gap:30px}
  .hero .container{grid-template-columns:1fr;gap:30px}
  .hero-art{height:360px;max-width:520px}
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:34px}
  .modal-box{grid-template-columns:1fr;max-width:520px}
  .modal-info{padding:6px 26px 28px}
}
@media(max-width:680px){
  .section{padding:60px 0}
  .nav{display:none;position:absolute;top:70px;left:0;right:0;flex-direction:column;gap:0;
    background:var(--paper);border-bottom:1px solid var(--line);padding:10px 0;box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .nav a{padding:13px 24px;width:100%}
  .menu-toggle{display:block}
  .header-cta .btn-gold{display:none}
  .cats,.why-grid,.grid{grid-template-columns:1fr 1fr;gap:14px}
  .hero h1{font-size:2.2rem}
  .section-head h2{font-size:1.8rem}
  .topbar .tb-contact .hide-sm{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .card .body{padding:13px 13px 16px}
  .card h3{font-size:.98rem}
}
@media(max-width:420px){
  .cats,.grid{grid-template-columns:1fr}
}