/* ============================================================
   淘金惠官网 前台样式（基于 demo 设计稿，品牌色一致）
   主色：科技蓝 #2E7BFF / 活力橙 #FF8A1E / 金星 #FFB800
   ============================================================ */
:root{
  --blue:#2E7BFF; --blue-deep:#1E5FE0; --blue-light:#5B9BFF;
  --orange:#FF8A1E; --orange-deep:#F26A00; --orange-light:#FFB259;
  --gold:#FFB800;
  --ink:#0F172A; --gray:#5B6472; --line:#E8ECF3; --bg:#F6F8FC;
  --shadow:0 10px 30px -12px rgba(20,52,120,.18);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 26px;border-radius:16px;font-weight:700;font-size:15px;cursor:pointer;border:none;transition:transform .2s,box-shadow .2s}
.btn-primary{background:linear-gradient(135deg,var(--orange-deep),var(--orange-light));color:#fff;box-shadow:0 12px 24px -10px rgba(255,138,30,.6)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
.btn-blue{background:linear-gradient(135deg,var(--blue-deep),var(--blue-light));color:#fff}
.btn-blue:hover{transform:translateY(-2px)}

/* Nav */
header.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.hamburger{display:none;background:none;border:none;font-size:26px;line-height:1;cursor:pointer;color:var(--ink);padding:0 4px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px}
.brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--blue-deep),var(--blue-light));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:13px;box-shadow:var(--shadow)}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{font-size:15px;color:var(--gray);font-weight:600}
.nav-links a:hover{color:var(--blue)}
.nav-cta{margin-left:8px}
.hamburger{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:var(--ink)}

/* Hero */
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#1E5FE0 0%,#2E7BFF 55%,#5B9BFF 100%);color:#fff;padding:90px 0 120px}
.hero .blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.35;pointer-events:none}
.blob.a{width:340px;height:340px;background:var(--orange);right:-60px;top:-80px}
.blob.b{width:300px;height:300px;background:#9CC0FF;left:-80px;bottom:-120px}
.star{position:absolute;color:var(--gold);opacity:.7}
.hero-grid{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.pill{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);padding:7px 16px;border-radius:999px;font-size:13px;font-weight:600;backdrop-filter:blur(6px)}
.hero h1{font-size:54px;line-height:1.1;font-weight:900;margin:18px 0 22px;letter-spacing:-1px}
.hero p.sub{font-size:18px;color:#DCE8FF;max-width:520px}
.hero .actions{display:flex;gap:16px;margin-top:34px;flex-wrap:wrap}
.mock{background:#fff;border-radius:24px;padding:20px;box-shadow:0 30px 60px -20px rgba(10,30,80,.45);position:relative}
.mock .mock-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.mock .mock-brand{display:flex;align-items:center;gap:8px;font-weight:800;color:#0F172A;font-size:14px}
.mock .mock-logo{width:30px;height:30px;border-radius:8px;background:#F2F6FF;display:flex;align-items:center;justify-content:center;color:var(--blue);font-weight:900;font-size:12px}
.tag-hot{background:rgba(255,138,30,.12);color:var(--orange);font-size:11px;font-weight:700;padding:4px 10px;border-radius:999px}
.mock .prod-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.pcard{background:#F6F8FC;border-radius:16px;padding:10px}
.pcard .ph{height:96px;border-radius:12px;background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden}
.pcard .ph img{height:80%;width:80%;object-fit:contain}
.pcard .ph .emoji{font-size:48px}
.pcard .pn{font-size:12px;color:#5B6472;margin-top:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pcard .pp{font-size:14px;font-weight:800;color:var(--orange);margin-top:4px}
.pcard .pp s{font-size:11px;color:#A6AEBB;font-weight:400;margin-left:4px}
.mock .bar{margin-top:16px;display:flex;align-items:center;justify-content:space-between;background:linear-gradient(135deg,#1E5FE0,#5B9BFF);border-radius:14px;padding:12px 16px;color:#fff;font-size:12px;font-weight:600}
.mock .bar .gold{color:var(--gold)}

/* Stats */
.stats{position:relative;z-index:5;margin-top:-60px}
.stats-grid{background:#fff;border-radius:24px;box-shadow:var(--shadow);display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:34px 24px}
.stat{text-align:center}
.stat .v{font-size:30px;font-weight:900;background:linear-gradient(135deg,var(--blue-deep),var(--blue-light));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .l{font-size:13px;color:var(--gray);margin-top:6px}

/* Section */
section.block{padding:84px 0}
.sec-head{text-align:center;margin-bottom:48px}
.sec-head h2{font-size:34px;font-weight:900;letter-spacing:-.5px}
.sec-head p{color:var(--gray);margin-top:12px;font-size:16px;max-width:640px;margin-inline:auto}

/* Business */
.biz-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.biz{background:#fff;border-radius:20px;padding:28px;box-shadow:var(--shadow);border:1px solid var(--line);transition:transform .25s,box-shadow .25s}
.biz:hover{transform:translateY(-6px);box-shadow:0 24px 44px -18px rgba(20,52,120,.28)}
.biz .ic{width:54px;height:54px;border-radius:16px;background:linear-gradient(135deg,var(--blue-deep),var(--blue-light));color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.biz h3{font-size:19px;font-weight:800}
.biz p{color:var(--gray);font-size:14px;margin-top:10px}
.biz .chip{display:inline-block;margin-top:16px;background:rgba(255,138,30,.12);color:var(--orange);font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px}

/* Advantage */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.adv{display:flex;gap:16px;background:#fff;border-radius:18px;padding:24px;box-shadow:var(--shadow);border:1px solid var(--line);transition:transform .25s}
.adv:hover{transform:translateY(-4px)}
.adv .ic{width:48px;height:48px;border-radius:14px;background:rgba(46,123,255,.1);color:var(--blue);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.adv h3{font-size:17px;font-weight:800}
.adv p{color:var(--gray);font-size:14px;margin-top:6px}

/* Goods */
.goods-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.good{background:#fff;border-radius:18px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);transition:transform .25s}
.good:hover{transform:translateY(-5px)}
.good .gp{height:150px;background:#F6F8FC;display:flex;align-items:center;justify-content:center}
.good .gp img{height:120px;width:120px;object-fit:contain}
.good .gp .emoji{font-size:54px}
.good .gb{padding:14px 16px}
.good .gn{font-size:14px;color:#0F172A;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.good .gcat{font-size:12px;color:var(--blue);font-weight:700;margin-bottom:4px}
.good .gprice{color:var(--orange);font-weight:800;font-size:17px;margin-top:8px}
.good .gprice s{color:#A6AEBB;font-weight:400;font-size:12px;margin-left:6px}

/* Categories */
.cat-cloud{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.cat-cloud span{background:#fff;border:1px solid var(--line);color:#3A4458;border-radius:999px;padding:9px 18px;font-size:14px;font-weight:600;box-shadow:var(--shadow);transition:all .2s}
.cat-cloud span:hover{color:#fff;background:linear-gradient(135deg,var(--blue-deep),var(--blue-light));border-color:transparent;transform:translateY(-2px)}

/* News */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ncard{background:#fff;border-radius:18px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);transition:transform .25s}
.ncard:hover{transform:translateY(-5px)}
.ncard .ncover{height:160px;background:linear-gradient(135deg,#1E5FE0,#5B9BFF);display:flex;align-items:center;justify-content:center;color:#fff;font-size:30px;font-weight:900}
.ncard .nb{padding:18px 20px}
.ncard .nt{font-size:17px;font-weight:800}
.ncard .ns{color:var(--gray);font-size:13px;margin-top:10px}
.ncard .nd{color:#A6AEBB;font-size:12px;margin-top:12px}

/* About */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about h2{font-size:32px;font-weight:900}
.about p{color:var(--gray);font-size:16px;margin-top:18px}
.about .kpi{display:flex;gap:24px;margin-top:28px}
.about .kpi div .n{font-size:28px;font-weight:900;color:var(--blue)}
.about .kpi div .t{font-size:13px;color:var(--gray)}
.about-card{background:linear-gradient(135deg,#1E5FE0,#5B9BFF);border-radius:24px;color:#fff;padding:40px;box-shadow:var(--shadow)}
.about-card h3{font-size:22px;margin-bottom:14px}
.about-card ul{list-style:none;display:grid;gap:12px}
.about-card li{display:flex;gap:10px;align-items:flex-start}
.about-card li .dot{width:8px;height:8px;border-radius:50%;background:var(--gold);margin-top:8px;flex-shrink:0}

/* Contact */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cbox{background:#fff;border-radius:20px;padding:30px;box-shadow:var(--shadow);border:1px solid var(--line);text-align:center}
.cbox .ic{width:52px;height:52px;border-radius:16px;background:linear-gradient(135deg,var(--orange-deep),var(--orange-light));color:#fff;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.cbox h3{font-size:18px;font-weight:800}
.cbox p{color:var(--gray);margin-top:8px;font-size:15px}
.cbox a{color:var(--blue);font-weight:700}

/* Banner 轮播 */
.banner-wrap{position:relative;height:280px;border-radius:20px;overflow:hidden;box-shadow:var(--shadow);margin-top:10px;background:linear-gradient(135deg,#1E5FE0,#5B9BFF)}
.banner-track{position:absolute;inset:0}
.banner-slide{position:absolute;inset:0;background:linear-gradient(135deg,#1E5FE0,#5B9BFF);color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden;opacity:0;transition:opacity .7s ease;pointer-events:none;text-decoration:none}
.banner-slide.active{opacity:1;pointer-events:auto}
.banner-slide:nth-child(2){background:linear-gradient(135deg,#F26A00,#FFB259)}
.banner-slide:nth-child(3){background:linear-gradient(135deg,#0B2E7A,#2E7BFF)}
.banner-slide:nth-child(4){background:linear-gradient(135deg,#0F766E,#14B8A6)}
.banner-slide img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.banner-slide::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.28));pointer-events:none}
.banner-slide .bt{position:relative;z-index:2;font-size:30px;font-weight:900;text-shadow:0 2px 12px rgba(0,0,0,.28);text-align:center;padding:0 20px}
.banner-slide .bs{position:relative;z-index:2;font-size:15px;margin-top:10px;opacity:.95;text-shadow:0 2px 8px rgba(0,0,0,.28);text-align:center;padding:0 20px}
.banner-dots{position:absolute;left:0;right:0;bottom:16px;display:flex;justify-content:center;gap:8px;z-index:5}
.bdot{width:8px;height:8px;border-radius:999px;background:rgba(255,255,255,.55);cursor:pointer;transition:all .3s}
.bdot.active{width:24px;background:#fff}

/* Footer */
footer.site-footer{background:#0F172A;color:#C7D0E0;padding:56px 0 28px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.footer-grid .fb{font-size:18px;font-weight:800;color:#fff;margin-bottom:12px}
.footer-grid a{color:#C7D0E0}
.footer-grid a:hover{color:#fff}
.footer-grid p{font-size:14px;margin-top:6px}
.ft-title{color:#fff;font-weight:700;margin-bottom:12px}
.footer-licenses{margin-top:34px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);font-size:13px;color:#9AA6BC;text-align:center;line-height:2}
.footer-licenses a{color:#9AA6BC;text-decoration:underline}

.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s,transform .7s}
.reveal.show{opacity:1;transform:none}

/* 防止 grid 子项被内容撑破（移动端横向溢出的根因） */
.hero-grid>*,.biz-grid>*,.adv-grid>*,.goods-grid>*,.news-grid>*,.contact-grid>*,.stats-grid>*,.footer-grid>*,.about-grid>*,.prod-grid>*,.banner-track>*{min-width:0}

@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr}
  .hero-grid>*{min-width:0}
  .mock{overflow:hidden}
  .biz-grid,.goods-grid,.news-grid{grid-template-columns:repeat(2,1fr)}
  .adv-grid{grid-template-columns:1fr 1fr}
  .about-grid,.contact-grid{grid-template-columns:1fr}
  .banner-wrap{height:220px}
  .banner-slide .bt{font-size:22px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:40px}
}
@media(max-width:640px){
  .nav-links{position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:10px 0;box-shadow:var(--shadow);display:none;border-bottom:1px solid var(--line)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 20px;width:100%}
  .hamburger{display:block}
  .biz-grid,.goods-grid,.adv-grid,.news-grid{grid-template-columns:1fr}
  .sec-head h2{font-size:26px}
  .hero{padding:60px 0 90px}
  .hero h1{font-size:32px;letter-spacing:-.5px}
  .hero p.sub{font-size:15px}
  .hero .actions .btn{padding:12px 20px;font-size:14px}
  .stats{margin-top:-40px}
  .stats-grid{padding:24px 14px;gap:18px}
  .stat .v{font-size:18px}
  .stat .l{font-size:12px}
  .banner-wrap{height:180px}
  .banner-slide .bt{font-size:18px}
  .banner-slide .bs{font-size:12px;padding:0 14px}
  .about .kpi{gap:16px}
  .about .kpi div .n{font-size:22px}
  .footer-licenses{font-size:12px;line-height:1.9}
}