:root{
    --green:#2d5016; --green-2:#3c6b1f; --lime:#7faf3a; --cream:#f7f4ec;
    --sand:#efe9da; --ink:#23281f; --muted:#6b7263; --line:#e2ddcf; --gold:#c9a227;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{font-family:"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--cream);line-height:1.65}
  a{color:inherit;text-decoration:none}
  .wrap{max-width:1180px;margin:0 auto;padding:0 22px}
  .en{color:var(--muted);font-size:.82em;letter-spacing:.02em}
  .btn{display:inline-block;background:var(--green);color:#fff;padding:12px 24px;border-radius:8px;font-weight:600;transition:.2s;letter-spacing:.02em}
  .btn:hover{background:var(--green-2);transform:translateY(-1px)}
  .btn.ghost{background:transparent;color:var(--green);border:1.5px solid var(--green)}
  .btn.ghost:hover{background:var(--green);color:#fff}

  /* NAV */
  header.nav{position:sticky;top:0;z-index:50;background:rgba(247,244,236,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
  .nav-in{display:flex;align-items:center;justify-content:space-between;height:64px;gap:10px}
  .logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--green);font-size:.98rem;letter-spacing:.04em;white-space:nowrap;flex:0 0 auto}
  .logo .dot{width:28px;height:28px;border-radius:50%;background:radial-gradient(circle at 30% 30%,var(--lime),var(--green));display:inline-block;flex:0 0 auto}
  nav ul{display:flex;gap:8px;list-style:none;font-weight:600;font-size:.95rem;align-items:center}
  nav a:hover{color:var(--green)}
  nav li.has-sub{position:relative}
  nav li.has-sub > a::after{content:" ▾";font-size:.7em;color:var(--muted)}
  nav li.has-sub .sub{display:none;position:absolute;top:100%;left:0;background:var(--cream);border:1px solid var(--line);border-radius:0 0 10px 10px;min-width:210px;padding:8px 0;box-shadow:0 10px 26px rgba(0,0,0,.10);z-index:60}
  nav li.has-sub:hover .sub{display:block}
  nav li.has-sub .sub li{padding:0}
  nav li.has-sub .sub a{display:block;padding:10px 18px;font-weight:500;font-size:.9rem;white-space:nowrap}
  nav li.has-sub .sub a::after{content:""}
  nav li.has-sub .sub a:hover{background:var(--sand);color:var(--green)}
  .lang-switch{display:flex;gap:4px;flex:0 0 auto}
  .lang-switch button{background:transparent;border:1px solid var(--line);border-radius:6px;padding:5px 10px;font-size:.82rem;font-weight:700;cursor:pointer;color:var(--muted);transition:.2s;font-family:inherit}
  .lang-switch button:hover{border-color:var(--green);color:var(--green)}
  .lang-switch button.active{background:var(--green);color:#fff;border-color:var(--green)}
  .menu-btn{display:none;background:none;border:0;font-size:1.6rem;cursor:pointer;flex:0 0 auto}

  /* HERO */
  .hero{position:relative;color:#fff;padding:120px 0 130px;background:url('../assets/hero.png') center/cover no-repeat;overflow:hidden}
  .hero::after{content:"";position:absolute;inset:0;background:linear-gradient(105deg,rgba(20,35,12,.86),rgba(20,35,12,.42))}
  .hero .wrap{position:relative;z-index:2}
  .hero h1{font-size:clamp(2.1rem,5vw,3.6rem);line-height:1.15;margin-bottom:14px;font-weight:800}
  .hero p.lead{font-size:clamp(1rem,2.2vw,1.25rem);max-width:640px;color:#eef3e6}
  .hero .cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
  .hero .badges{margin-top:34px;display:flex;gap:26px;flex-wrap:wrap}
  .hero .badges div{font-size:.9rem}
  .hero .badges b{display:block;font-size:1.7rem;color:var(--lime)}

  /* SECTION */
  section{padding:74px 0}
  .sec-head{text-align:center;margin-bottom:42px}
  .sec-head h2{font-size:clamp(1.6rem,3.5vw,2.3rem);color:var(--green);font-weight:800}
  .sec-head p{margin-top:8px}
  .alt{background:var(--sand)}

  /* PRODUCTS */
  .grid2{display:grid;grid-template-columns:1fr 1fr;gap:28px}
  .pcard{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;display:flex;flex-direction:column;transition:.25s}
  .pcard:hover{box-shadow:0 14px 40px rgba(45,80,22,.14);transform:translateY(-3px)}
  .pcard img{width:100%;height:280px;object-fit:cover}
  .pcard .body{padding:24px}
  .pcard h3{font-size:1.35rem;color:var(--green)}
  .pcard .tag{display:inline-block;background:var(--sand);color:var(--green);font-size:.78rem;font-weight:700;padding:3px 10px;border-radius:20px;margin-bottom:10px}
  .specs{margin-top:16px;border-top:1px dashed var(--line);padding-top:14px}
  .specs .row{display:flex;justify-content:space-between;padding:6px 0;font-size:.93rem;border-bottom:1px solid #f1eee4}
  .specs .row span:first-child{color:var(--muted)}
  .specs .row b{color:var(--ink)}

  /* PROCESS */
  .proc-banner{width:100%;height:240px;object-fit:cover;border-radius:14px;margin-bottom:32px;border:1px solid var(--line);cursor:zoom-in}
  .proc{display:grid;grid-template-columns:repeat(auto-fit,minmax(155px,1fr));gap:16px}
  .proc .step{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 16px;text-align:center}
  .proc .step .n{width:42px;height:42px;border-radius:50%;background:var(--green);color:#fff;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-weight:800;font-size:1.05rem}
  .proc .step h4{color:var(--green);font-size:1.02rem;margin-bottom:5px}
  .proc .step p{color:var(--muted);font-size:.84rem}
  .order-info{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px;margin-top:34px}
  .order-info .oi{background:#fff;border:1px solid var(--line);border-left:4px solid var(--green);border-radius:12px;padding:16px 18px}
  .order-info .oi b{color:var(--green);display:block;font-size:1.02rem;margin-bottom:5px}
  .order-info .oi span{color:var(--muted);font-size:.86rem;display:block}

  /* GALLERY */
  .gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
  .gallery figure{margin:0;border-radius:14px;overflow:hidden;position:relative;cursor:zoom-in;border:1px solid var(--line);background:#fff}
  .gallery img{width:100%;height:280px;object-fit:cover;display:block;transition:.3s}
  .gallery figure:hover img{transform:scale(1.05)}
  .gallery figcaption{position:absolute;left:0;right:0;bottom:0;padding:14px 16px;color:#fff;background:linear-gradient(transparent,rgba(20,35,12,.85));font-weight:600;font-size:.95rem}
  .gallery figcaption small{display:block;font-weight:400;color:#d6e2c8}

  /* CERTS */
  .certs{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
  .cert{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;cursor:zoom-in}
  .cert img{width:100%;height:360px;object-fit:cover}
  .cert .meta{padding:16px 20px}
  .cert .meta h4{color:var(--green);font-size:1.1rem}
  .cert .meta p{color:var(--muted);font-size:.88rem;margin-top:4px}
  .sys-head{text-align:center;color:var(--green);font-size:1.15rem;font-weight:800;margin:30px 0 16px}
  .cert-badges{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
  .cbadge{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 14px;text-align:center}
  .cbadge .seal{width:62px;height:62px;border-radius:50%;background:var(--green);color:#fff;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-weight:800;font-size:.9rem;letter-spacing:.5px}
  .cbadge h4{color:var(--green);font-size:1.02rem;margin-bottom:6px}
  .cbadge p{color:var(--muted);font-size:.82rem;line-height:1.45}

  /* ABOUT */
  .about{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
  .about ul{list-style:none;margin-top:18px}
  .about li{padding:10px 0 10px 32px;position:relative;border-bottom:1px solid var(--line)}
  .about li::before{content:"✓";position:absolute;left:0;top:10px;color:var(--lime);font-weight:800}
  .stat4{display:grid;grid-template-columns:1fr 1fr;gap:16px}
  .stat4 div{background:var(--green);color:#fff;border-radius:14px;padding:22px;text-align:center}
  .stat4 b{display:block;font-size:1.9rem}
  .stat4 span{font-size:.85rem;color:#dce8cf}

  /* CONTACT */
  .contact{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start}
  .contact .info p{margin-bottom:12px}
  .contact .info b{color:var(--green)}
  .form{border:1px solid var(--line);border-radius:16px;padding:26px;background:#fff}
  .form label{display:block;font-size:.85rem;color:var(--muted);margin:12px 0 5px}
  .form input,.form textarea{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:8px;font-size:.95rem;font-family:inherit;background:var(--cream)}
  .form textarea{resize:vertical;min-height:90px}
  .form .btn{margin-top:16px;width:100%;text-align:center;border:0;cursor:pointer}

  footer{background:var(--ink);color:#cfd6c4;padding:34px 0;text-align:center;font-size:.9rem}
  footer b{color:#fff}

  /* LIGHTBOX */
  .lb{position:fixed;inset:0;background:rgba(10,15,7,.9);display:none;align-items:center;justify-content:center;z-index:100;padding:30px}
  .lb.open{display:flex}
  .lb img{max-width:92vw;max-height:88vh;border-radius:10px}
  .lb .x{position:absolute;top:18px;right:24px;color:#fff;font-size:2rem;cursor:pointer}

  @media(max-width:860px){
    nav ul{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;background:var(--cream);border-bottom:1px solid var(--line);padding:14px 22px;gap:10px}
    nav ul.show{display:flex}
    nav li.has-sub .sub{position:static;border:0;box-shadow:none;padding:4px 0 4px 16px;min-width:0}
    nav li.has-sub .sub a{padding:8px 0}
    .menu-btn{display:block}
    .grid2,.gallery,.certs,.about,.contact{grid-template-columns:1fr}
    .cert-badges{grid-template-columns:repeat(2,1fr)}
    .stat4{grid-template-columns:1fr 1fr}
  }

  .wa-btn{display:inline-flex;align-items:center;gap:7px;background:#25D366;color:#fff;padding:8px 18px;border-radius:24px;font-weight:600;font-size:14px;text-decoration:none;transition:all .2s;box-shadow:0 2px 8px rgba(37,211,102,.25);margin-left:6px;vertical-align:middle}
  .wa-btn:hover{background:#1DA851;transform:translateY(-1px);box-shadow:0 4px 14px rgba(37,211,102,.38)}

  /* WECHAT FLOATING CUSTOMER SERVICE */
  .wx-fab{position:fixed;right:20px;bottom:22px;z-index:90;display:inline-flex;align-items:center;gap:8px;background:#07C160;color:#fff;padding:11px 16px;border-radius:30px;font-weight:600;font-size:14px;text-decoration:none;box-shadow:0 4px 16px rgba(7,193,96,.35);transition:all .2s}
  .wx-fab:hover{background:#06AD56;transform:translateY(-2px);box-shadow:0 6px 22px rgba(7,193,96,.45)}
  .wx-fab .ico{font-size:18px;line-height:1}
  .wx-modal{position:fixed;inset:0;background:rgba(10,15,7,.88);display:none;align-items:center;justify-content:center;z-index:120;padding:24px}
  .wx-modal.open{display:flex}
  .wx-card{background:#fff;border-radius:16px;max-width:340px;width:100%;padding:28px 24px;text-align:center;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.4)}
  .wx-card .x{position:absolute;top:12px;right:16px;font-size:1.7rem;color:#aaa;cursor:pointer;line-height:1}
  .wx-card h3{font-size:1.25rem;margin-bottom:4px;color:var(--ink)}
  .wx-card .en{color:var(--muted);font-size:.85rem;margin-bottom:16px}
  .wx-card img{width:200px;height:200px;object-fit:contain;border:1px solid var(--line);border-radius:10px;margin:0 auto 14px;display:block}
  .wx-card .wxid{font-weight:700;color:var(--green);font-size:1.08rem;margin:6px 0}
  .wx-card .tip{color:var(--muted);font-size:.8rem;margin-top:10px;line-height:1.5}
  @media(max-width:860px){ .wx-fab span.txt{display:none} .wx-fab{padding:13px;border-radius:50%} .wx-fab .ico{font-size:20px} }
  /* 行业新闻 */
  #news h2{text-align:center}
  #news .news-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;margin-top:22px}
  .news-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;transition:.2s}
  .news-item:hover{box-shadow:0 6px 22px rgba(0,0,0,.08);transform:translateY(-2px)}
  .news-date{font-size:.78rem;color:var(--green);font-weight:700;letter-spacing:.5px}
  .news-title{font-size:1.05rem;margin:8px 0 6px;color:var(--ink);line-height:1.4}
  .news-sum{color:var(--muted);font-size:.88rem;line-height:1.6}
  .subscribe{margin-top:30px;background:var(--green);border-radius:16px;padding:26px 24px;text-align:center;color:#fff}
  .subscribe h3{color:#fff;margin-bottom:14px}
  .subscribe form{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;max-width:460px;margin:0 auto}
  .subscribe input{flex:1;min-width:200px;padding:12px 14px;border:0;border-radius:10px;font-size:.95rem}
  .subscribe button{background:#fff;color:var(--green);border:0;border-radius:10px;padding:12px 24px;font-weight:700;cursor:pointer;font-size:.95rem}
  .subscribe button:hover{background:#eef6ef}
  .subscribe .sub-tip{font-size:.82rem;margin-top:12px;opacity:.9}
  @media(max-width:860px){ .subscribe form{flex-direction:column} .subscribe input{min-width:0} }

  /* ===== 首页 Banner（奇亚籽产地大片：assets/banner.jpg 由 hero.png 裁成 1920×760） ===== */
  .hero{background:url('../assets/banner.jpg') center 45%/cover no-repeat #22371a}
  @media (max-width:900px){.hero{background-image:url('../assets/banner-960.jpg');background-position:center 40%}}
  /* 底部渐隐到页面底色，banner 与下面内容衔接更自然 */
  .hero::before{content:"";position:absolute;left:0;right:0;bottom:0;height:150px;z-index:1;
    background:linear-gradient(180deg,rgba(247,244,236,0),var(--cream))}
  .hero::after{z-index:1}
  .hero .wrap{z-index:2}
  .hero .eyebrow{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.35);
    padding:6px 14px;border-radius:999px;font-size:.85rem;letter-spacing:.08em;margin-bottom:16px}

  /* ===== 资质证书可下载（certs 卡右下角下载按钮） ===== */
  .cert{position:relative}
  .cert-dl{position:absolute;top:12px;right:12px;z-index:3;background:rgba(255,255,255,.94);color:var(--green);
    border:1px solid var(--line);border-radius:999px;padding:7px 15px;font-size:.84rem;font-weight:800;
    box-shadow:0 4px 16px rgba(20,35,12,.18);white-space:nowrap}
  .cert-dl:hover{background:var(--green);color:#fff}
  .cert .meta{padding-bottom:22px}
  /* 下载卡片里的按钮 */
  .p-card .dl-btn{margin-top:16px;align-self:flex-start}
  .p-card .dl-file{font-size:.8rem;color:var(--muted);margin-top:10px}
  /* 产品详情页「质量标准与限值」下面的附件下载按钮行 */
  .dl-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}
  .dl-row a{font-size:.93rem}

  /* ===== 多页面 / 产品中心 通用 ===== */
  .phead{background:linear-gradient(135deg,var(--green),var(--green-2));color:#fff;padding:52px 0 44px}
  .phead .crumb{font-size:.85rem;opacity:.85;margin-bottom:14px}
  .phead .crumb a{color:#e2efd6;border-bottom:1px solid rgba(255,255,255,.35)}
  .phead .crumb a:hover{color:#fff}
  .eyebrow{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);border-radius:20px;padding:4px 14px;font-size:.76rem;letter-spacing:.1em;margin-bottom:14px}
  .phead h1{font-size:clamp(1.7rem,4vw,2.45rem);font-weight:800;margin-bottom:10px;line-height:1.25}
  .phead p.lead{max-width:780px;color:#e8f1de}
  .band{background:var(--sand)}
  .band-in{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;padding:32px 0}
  .band-in h3{font-size:1.3rem;color:var(--green);font-weight:800}
  .band-in p{color:var(--muted);margin-top:4px}
  .tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(232px,1fr));gap:18px}
  .tile{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;transition:.2s}
  .tile:hover{border-color:var(--lime);transform:translateY(-2px)}
  .tile .ico{width:44px;height:44px;border-radius:12px;background:var(--sand);color:var(--green);display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:12px;font-size:1.05rem}
  .tile h4{color:var(--green);font-size:1.05rem;margin-bottom:6px}
  .tile p{color:var(--muted);font-size:.88rem}
  /* 首页产品入口：卡片顶部实物图（黑/白奇亚籽微距照），上图下文 */
  .tile-photo{padding:0;overflow:hidden;display:flex;flex-direction:column}
  .tile-photo .ph{width:100%;height:190px;object-fit:cover;display:block;border-bottom:1px solid var(--line)}
  .tile-photo .tile-bd{padding:18px 20px 20px}
  .tile-photo h4{font-size:1.05rem;margin-bottom:8px}
  .tile-photo p{font-size:.88rem;line-height:1.65}
  .tile-photo:hover .ph{transform:scale(1.04)}
  .tile-photo .ph{transition:transform .4s ease}
  .grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:20px}
  .p-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;display:flex;flex-direction:column;transition:.25s}
  .p-card:hover{box-shadow:0 14px 40px rgba(45,80,22,.14);transform:translateY(-3px)}
  .p-card .dir{display:inline-block;align-self:flex-start;font-size:.74rem;font-weight:800;padding:3px 10px;border-radius:20px;margin-bottom:10px;letter-spacing:.03em}
  .p-card .dir.imp{background:#eaf3de;color:var(--green)}
  .p-card .dir.exp{background:#fdf1e0;color:#9a6b12}
  .p-card h3{font-size:1.2rem;color:var(--green);margin-bottom:6px}
  .p-card .origin{color:var(--muted);font-size:.84rem;margin-bottom:10px}
  .p-card p{color:var(--muted);font-size:.9rem;flex:1}
  .p-card ul.mini{list-style:none;margin:14px 0 18px;border-top:1px dashed var(--line);padding-top:12px}
  .p-card ul.mini li{font-size:.87rem;color:var(--ink);padding:3px 0;display:flex;justify-content:space-between;gap:12px}
  .p-card ul.mini li span{color:var(--muted)}
  .p-card .btn{width:100%;text-align:center;padding:10px 18px;font-size:.9rem}
  .dir-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin:36px 0 8px}
  .dir-head h2{font-size:clamp(1.4rem,3vw,1.9rem);color:var(--green);font-weight:800}
  .dir-head p{color:var(--muted)}
  .tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:#fff}
  table.tbl{width:100%;border-collapse:collapse;min-width:520px;font-size:.93rem}
  table.tbl th,table.tbl td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
  table.tbl th{background:var(--sand);color:var(--green);font-weight:700;white-space:nowrap}
  table.tbl tr:last-child td{border-bottom:0}
  table.tbl td:first-child{color:var(--muted)}
  /* 产品规格确认表：第三列留给买方填写 */
  table.tbl td.sc-r{color:var(--muted);font-style:italic;background:#fbfdf6;min-width:170px}
  .cmp-note{color:var(--muted);font-size:.86rem;margin-top:12px}
  .sc-note{margin-top:14px;font-size:.86rem;color:var(--muted)}
  details.faq{border:1px solid var(--line);border-radius:12px;background:#fff;margin-bottom:10px}
  details.faq summary{cursor:pointer;padding:16px 18px;font-weight:700;color:var(--green);list-style:none}
  details.faq summary::-webkit-details-marker{display:none}
  details.faq summary::after{content:"+";float:right;color:var(--muted);font-weight:700}
  details.faq[open] summary::after{content:"\2212"}
  details.faq .a{padding:0 18px 16px;color:var(--muted);font-size:.92rem}
  footer .ft{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:26px;text-align:left}
  footer .ft h5{color:#fff;font-size:.95rem;margin-bottom:10px}
  footer .ft ul{list-style:none}
  footer .ft li{padding:3px 0;font-size:.86rem}
  footer .ft a:hover{color:#fff;text-decoration:underline}
  footer .ft-bot{border-top:1px solid #2f3628;margin-top:22px;padding-top:16px;font-size:.84rem;color:#9aa890}
  .news-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;margin-top:22px}
  table.tbl tr.gh td{background:var(--green);color:#fff;font-weight:700;font-size:.9rem;letter-spacing:.02em;
    padding:9px 14px;border-left:0;border-right:0}
  table.tbl tr.gh td:first-child{border-left:0}
  table.tbl td:last-child{font-weight:600;white-space:nowrap}
  @media(max-width:860px){
    nav li.has-sub .sub{display:block;position:static;box-shadow:none;border:0;padding:2px 0 8px 16px;min-width:0}
    nav li.has-sub .sub a{padding:7px 0}
    .phead{padding:36px 0 30px}
    footer .ft{grid-template-columns:1fr 1fr}
    .band-in{padding:26px 0}
    .dl-frame{height:640px!important;border-radius:12px}
  }
  /* ===== 合同资料库（嵌入 iframe：客户下载表单直接长在官网页面里） ===== */
  .dl-frame{display:block;width:100%;height:560px;border:1px solid var(--line);border-radius:14px;
    background:#fff;overflow:hidden}
  .dl-note{font-size:.9rem;color:var(--muted);line-height:1.8;margin-top:14px}