/* 青藏源 · 官网样式
   设计原则：B 端可信感 + 大地色系（羊肚菌品类），克制、无营销腔 */

:root{
  --ink:#241f1a;
  --ink2:#4d453d;
  --ink3:#8a8079;
  --brown:#4a3a28;
  --brown-d:#2f2519;
  --amber:#b07a3c;
  --amber-l:#f0e2cf;
  --bg:#faf8f5;
  --card:#ffffff;
  --line:#e7e1d8;
  --line2:#f0ebe3;
  --green:#3f7d5a;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink2);line-height:1.8;font-size:15px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
header{
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;
}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:baseline;gap:9px}
.logo .cn{font-size:20px;font-weight:700;letter-spacing:2px;color:var(--ink)}
.logo .en{font-size:10px;letter-spacing:2.4px;color:var(--ink3);text-transform:uppercase}
.nav ul{display:flex;gap:30px;list-style:none;font-size:14px}
.nav ul a{color:var(--ink2);padding:4px 0;border-bottom:2px solid transparent;transition:.2s}
.nav ul a:hover,.nav ul a.on{color:var(--brown);border-bottom-color:var(--amber)}
.nav .tel{font-size:13px;color:var(--ink3);font-variant-numeric:tabular-nums}

/* ---------- hero ---------- */
.hero{
  background:linear-gradient(155deg,#2f2519 0%,#4a3a28 55%,#5c4832 100%);
  color:#f5efe6;padding:76px 0 70px;position:relative;overflow:hidden;
}
.hero::after{
  content:'';position:absolute;right:-120px;top:-120px;width:520px;height:520px;
  border-radius:50%;background:radial-gradient(circle,rgba(176,122,60,.28),transparent 68%);
}
.hero .wrap{position:relative;z-index:2}
.hero .eyebrow{
  font-size:12px;letter-spacing:3px;color:#c9a878;text-transform:uppercase;margin-bottom:18px;
}
.hero h1{font-size:40px;line-height:1.32;font-weight:700;letter-spacing:.5px;margin-bottom:20px;color:#fbf7f0}
.hero h1 em{font-style:normal;color:#d9b483}
.hero p{font-size:16px;line-height:1.9;color:#d6cbbd;max-width:660px}
.hero .cta{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-block;padding:12px 26px;border-radius:6px;font-size:14px;font-weight:600;
  transition:.2s;border:1px solid transparent;
}
.btn-p{background:var(--amber);color:#fff}
.btn-p:hover{background:#9a6830}
.btn-g{border-color:rgba(255,255,255,.32);color:#f5efe6}
.btn-g:hover{border-color:rgba(255,255,255,.7);background:rgba(255,255,255,.06)}

/* ---------- stats ---------- */
.stats{background:var(--card);border-bottom:1px solid var(--line)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0;padding-top:0;padding-bottom:0}
.stat{padding:28px 20px;border-right:1px solid var(--line2);text-align:center}
.stat:last-child{border-right:none}
.stat .n{font-size:28px;font-weight:700;color:var(--brown);letter-spacing:-.5px;font-variant-numeric:tabular-nums}
.stat .n small{font-size:14px;font-weight:600;margin-left:2px}
.stat .l{font-size:12.5px;color:var(--ink3);margin-top:4px}

/* ---------- section ---------- */
section.block{padding:64px 0}
section.block.alt{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:36px;max-width:720px}
.sec-head .k{font-size:12px;letter-spacing:2.6px;color:var(--amber);font-weight:600;text-transform:uppercase;margin-bottom:10px}
.sec-head h2{font-size:27px;font-weight:700;color:var(--ink);line-height:1.4;letter-spacing:-.2px}
.sec-head p{margin-top:12px;font-size:14.5px;color:var(--ink3);line-height:1.85}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:26px 28px;transition:.22s;
}
section.block.alt .card{background:#fdfcfb}
.card:hover{border-color:#d8cdbb;box-shadow:0 3px 16px rgba(74,58,40,.06)}
.card .ico{font-size:19px;margin-bottom:12px;color:var(--amber)}
.card h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:9px}
.card p{font-size:14px;color:var(--ink2);line-height:1.8}

/* ---------- table ---------- */
table{width:100%;border-collapse:collapse;font-size:14px;background:var(--card);margin:8px 0 0}
th{background:#f4efe7;color:var(--brown);font-weight:600;text-align:left;padding:13px 14px;font-size:13px;border-bottom:1px solid var(--line)}
td{padding:13px 14px;border-bottom:1px solid var(--line2);color:var(--ink2);vertical-align:top}
tr:last-child td{border-bottom:none}
td.n{font-variant-numeric:tabular-nums}

/* ---------- steps ---------- */
.steps{counter-reset:s;display:grid;gap:2px;background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.step{background:var(--card);padding:22px 26px;display:grid;grid-template-columns:44px 1fr;gap:16px}
.step::before{
  counter-increment:s;content:counter(s,decimal-leading-zero);
  font-size:13px;font-weight:700;color:var(--amber);letter-spacing:1px;padding-top:2px;
}
.step h4{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:6px}
.step p{font-size:13.5px;color:var(--ink2);line-height:1.8}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{
  font-size:15px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:16px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';font-size:19px;color:var(--amber);font-weight:400;line-height:1}
.faq details[open] summary::after{content:'–'}
.faq .a{padding-top:12px;font-size:14px;color:var(--ink2);line-height:1.85;max-width:860px}

/* ---------- notice ---------- */
.note{
  background:#fdf8f0;border-left:3px solid var(--amber);
  padding:16px 20px;border-radius:0 6px 6px 0;font-size:13.5px;color:#6b5433;margin:22px 0;line-height:1.8;
}
.fill{background:#fff3cd;color:#8a6d1f;padding:1px 6px;border-radius:3px;font-size:13px;font-weight:600}

/* ---------- timeline ---------- */
.tl{position:relative;margin-left:8px;padding-left:26px;border-left:1px solid var(--line)}
.tl-item{position:relative;padding-bottom:26px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:'';position:absolute;left:-31px;top:8px;width:9px;height:9px;border-radius:50%;
  background:var(--amber);border:2px solid var(--bg);
}
.tl-item .y{font-size:13px;font-weight:700;color:var(--amber);letter-spacing:1px;margin-bottom:3px}
.tl-item .t{font-size:14.5px;color:var(--ink);font-weight:600;margin-bottom:4px}
.tl-item p{font-size:13.5px;color:var(--ink2)}

/* ---------- sourcing ---------- */
.two{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}

/* ---------- contact ---------- */
.contact-box{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:32px 34px}
.contact-box h3{font-size:18px;color:var(--ink);margin-bottom:18px}
.kv{display:grid;grid-template-columns:96px 1fr;gap:10px 18px;font-size:14px}
.kv dt{color:var(--ink3);font-size:13.5px}
.kv dd{color:var(--ink2)}

/* ---------- footer ---------- */
footer{background:#241c13;color:#a89c8d;padding:48px 0 30px;font-size:13px;line-height:2}
footer .top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.09)}
footer .brand-cn{font-size:17px;color:#e8dfd2;font-weight:700;letter-spacing:2px;margin-bottom:10px}
footer p{color:#8e8276;font-size:12.5px;line-height:1.9}
footer h5{color:#c9bca8;font-size:12.5px;font-weight:600;margin-bottom:10px;letter-spacing:.5px}
footer ul{list-style:none;font-size:12.5px}
footer ul li{margin-bottom:6px}
footer a:hover{color:#d9b483}
footer .legal{padding-top:22px;font-size:11.5px;color:#6f6357;line-height:1.9}
footer .legal b{color:#8e8276;font-weight:600}

@media(max-width:860px){
  .nav ul{display:none}
  .hero h1{font-size:29px}
  .stats .wrap{grid-template-columns:1fr 1fr}
  .stat:nth-child(2){border-right:none}
  .cards,.two{grid-template-columns:1fr}
  section.block{padding:44px 0}
  footer .top{grid-template-columns:1fr}
  .sec-head h2{font-size:22px}
}