/* ============================================================
   TechPapa — 单页主站样式（大气风格）
   ============================================================ */
:root{
  --gold:#f3af0d;
  --gold-light:#fbd14a;
  --gold-dark:#d99b07;
  --ink:#1c1c22;
  --deep:#0f131c;
  --deep-2:#171c28;
  --gray:#5d6370;
  --line:#e8e6e0;
  --bg:#ffffff;
  --bg-soft:#f7f5f0;
  --radius:16px;
  --shadow:0 24px 60px rgba(15,19,28,.10);
  --shadow-sm:0 12px 30px rgba(15,19,28,.08);
  --pad:110px;
  --header-h:82px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
input,select,button{font:inherit}
.container{width:min(1180px,92%);margin:0 auto}

/* 锚点定位：抵消吸顶导航高度 */
section[id]{scroll-margin-top:var(--header-h)}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--header-h);
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(28,28,34,.06);
  transition:box-shadow .35s var(--ease),background .35s;
}
.site-header.scrolled{box-shadow:0 10px 30px rgba(15,19,28,.08)}
.header-inner{
  width:min(1350px,94%);margin:0 auto;height:100%;
  display:flex;align-items:center;gap:28px;
}
.brand img{height:52px;width:auto;object-fit:contain;filter:grayscale(0)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.main-nav a{
  position:relative;padding:10px 14px;font-size:15px;color:var(--ink);
  white-space:nowrap;transition:color .25s;
}
.main-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.main-nav a:hover{color:var(--gold-dark)}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1)}
.main-nav a.active{color:var(--gold-dark)}
.main-nav .nav-tmall{
  margin-left:8px;padding:8px 18px;border:1.5px solid var(--gold);border-radius:999px;
  color:var(--gold-dark);font-weight:600;
}
.main-nav .nav-tmall:hover{background:var(--gold);color:#fff;border-color:var(--gold)}
.header-actions{display:flex;align-items:center;gap:16px}
.lang{display:flex;align-items:center;gap:8px}
.lang a{width:28px;height:18px;border-radius:3px;overflow:hidden;opacity:.6;border:1px solid #eee;transition:opacity .2s}
.lang a:hover{opacity:1}
.lang a.on{opacity:1;box-shadow:0 0 0 2px var(--gold)}
.lang img{width:100%;height:100%;object-fit:cover}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:40px;height:40px;padding:10px;flex-direction:column;justify-content:center;gap:5px}
.nav-toggle span{height:2px;background:var(--ink);border-radius:2px;transition:.3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ Hero ============ */
.hero{position:relative;height:750px;overflow:hidden;margin-top:var(--header-h)}
.hero-slider{position:absolute;inset:0;z-index:0}
.slide{position:absolute;inset:0;opacity:0;transition:opacity 1.1s var(--ease)}
.slide.is-active{opacity:1;z-index:1}
.slide img{width:100%;height:100%;object-fit:cover}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 34px;font-size:15px;letter-spacing:1px;border-radius:999px;font-weight:600;
  transition:transform .25s var(--ease),box-shadow .25s,background .25s;
}
.btn-gold{background:var(--gold);color:#1c1c22}
.btn-gold:hover{background:var(--gold-light);transform:translateY(-3px);box-shadow:0 16px 34px rgba(243,175,13,.42)}
.hero-arrow{
  position:absolute;top:50%;transform:translateY(-50%);z-index:4;width:52px;height:52px;
  border-radius:50%;border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.08);
  color:#fff;font-size:26px;line-height:1;cursor:pointer;backdrop-filter:blur(4px);transition:.25s;
}
.hero-arrow:hover{background:var(--gold);border-color:var(--gold)}
.hero-prev{left:26px}.hero-next{right:26px}
.hero-dots{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);z-index:4;display:flex;gap:9px}
.hero-dots button{width:26px;height:4px;border-radius:3px;border:0;background:rgba(255,255,255,.4);cursor:pointer;transition:.3s}
.hero-dots button.on{background:var(--gold);width:38px}

/* ============ 通用区块 ============ */
.section{padding:var(--pad) 0}
.about{background:var(--bg)}
.section-head{text-align:center;margin-bottom:64px}
.kicker{
  display:inline-block;font-size:12px;letter-spacing:4px;color:var(--gold-dark);font-weight:700;
  text-transform:uppercase;
}
.kicker::before,.kicker::after{content:"—";margin:0 10px;color:var(--gold)}
.section-title{font-size:clamp(28px,4vw,42px);font-weight:800;margin-top:14px;letter-spacing:1px}
.lead{margin-top:14px;color:var(--gray);font-size:16px;max-width:640px;margin-left:auto;margin-right:auto}
.section-head.light .section-title,.section-head.light .lead{color:#fff}
.section-head.light .kicker{color:var(--gold-light)}
.section-head.light .kicker::before,.section-head.light .kicker::after{color:var(--gold-light)}

/* ============ 品牌理念 ============ */
.about-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:64px;align-items:center}
.about-media{position:relative}
.about-media .ph-image{width:100%;border-radius:var(--radius);box-shadow:var(--shadow);aspect-ratio:4/3;object-fit:cover}
.about-years{
  position:absolute;right:-22px;bottom:-22px;background:var(--gold);color:#1c1c22;
  padding:22px 26px;border-radius:14px;box-shadow:var(--shadow);text-align:center;line-height:1.3;
}
.about-years .num{display:block;font-size:40px;font-weight:900;letter-spacing:1px}
.about-years .txt{font-size:14px;font-weight:600}
.about-quote{
  font-size:20px;line-height:1.8;color:var(--ink);border-left:4px solid var(--gold);
  padding-left:20px;margin-bottom:24px;
}
.about-quote strong{color:var(--gold-dark)}
.about-p{font-size:15px;color:var(--gray);margin-bottom:14px;text-align:justify}
.about-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:30px}
.about-stats li{padding:18px 12px;border:1px solid var(--line);border-radius:12px;text-align:center;transition:.3s}
.about-stats li:hover{border-color:var(--gold);transform:translateY(-4px)}
.stat-num{display:block;font-size:26px;font-weight:800;color:var(--gold-dark)}
.stat-label{font-size:13px;color:var(--gray)}

/* ============ 产品中心 ============ */
.products{background:var(--bg-soft)}
.product-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:34px 0 30px;
}
.product-row + .product-row{border-top:1px solid var(--line);margin-top:14px}
.product-media img{
  width:100%;border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .5s var(--ease);
}
.product-media:hover img{transform:translateY(-6px) scale(1.015)}
.product-tag{
  display:inline-block;font-size:12px;letter-spacing:2px;color:var(--gold-dark);
  background:rgba(243,175,13,.12);padding:6px 14px;border-radius:999px;font-weight:700;
}
.product-name{font-size:clamp(28px,3.6vw,40px);font-weight:800;margin-top:16px}
.product-sub{color:var(--gray);font-size:16px;margin-top:6px}
.product-meta{display:flex;gap:0;margin:24px 0;border:1px solid var(--line);border-radius:12px;overflow:hidden;width:max-content;max-width:100%}
.product-meta div{padding:14px 20px;text-align:center;border-right:1px solid var(--line);background:#fff}
.product-meta div:last-child{border-right:0}
.product-meta dt{font-size:13px;color:var(--gray)}
.product-meta dd{font-size:18px;font-weight:700;white-space:nowrap}
.feature-list li{display:flex;gap:14px;margin-bottom:16px}
.feature-list i{
  flex:none;width:26px;height:26px;margin-top:3px;border-radius:50%;background:var(--gold);
  color:#fff;font-size:12px;font-style:normal;display:flex;align-items:center;justify-content:center;
}
.feature-list strong{display:block;font-size:16px;margin-bottom:2px}
.feature-list span{font-size:14px;color:var(--gray)}
.row-rev .product-media{order:2}
.row-rev{}

/* ============ 服务 ============ */
.service{background:var(--deep);background-image:radial-gradient(circle at 20% 0%,rgba(243,175,13,.10),transparent 40%),radial-gradient(circle at 90% 100%,rgba(243,175,13,.08),transparent 40%)}
.service .lead{color:#9aa2b2}
.service-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px}
.service-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.service-card-head{padding:32px 34px 22px;border-bottom:1px solid var(--line)}
.service-card-head h3{font-size:24px;font-weight:800;display:flex;align-items:center;gap:10px}
.service-card-head h3::before{content:"";width:6px;height:22px;background:var(--gold);border-radius:3px}
.service-card-head p{color:var(--gray);font-size:14px;margin-top:6px}
.service-media-placeholder{
  height:150px;background:linear-gradient(120deg,#f3f1ea,#e9e6de);
  color:#a99d83;display:flex;align-items:center;justify-content:center;letter-spacing:2px;font-size:14px;
  font-style:italic;
}
.care-list{padding:18px 34px 34px}
.care-list li{display:flex;gap:16px;align-items:flex-start;padding:11px 0;border-bottom:1px dashed var(--line)}
.care-list li:last-child{border-bottom:0}
.care-list span{font-size:13px;font-weight:800;color:var(--gold-dark);font-style:italic;padding-top:3px}
.care-list p{font-size:14px;color:#3c4048}
/* 表单 */
.card-form .activate-form{padding:26px 34px 36px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:7px}
.field input,.field select{
  width:100%;padding:13px 16px;border:1.5px solid var(--line);border-radius:10px;
  font-size:15px;color:var(--ink);background:#fbfaf8;transition:.25s;outline:none;
}
.field input:focus,.field select:focus{border-color:var(--gold);background:#fff;box-shadow:0 0 0 4px rgba(243,175,13,.12)}
.field-note{font-size:12.5px;color:var(--gray);margin-bottom:18px}
.btn-block{width:100%}

/* ============ 联系我们 ============ */
.contact{background:var(--deep-2);position:relative;background-image:radial-gradient(circle at 80% 10%,rgba(243,175,13,.09),transparent 45%)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:stretch}
.contact-info{color:#e9ecf2}
.contact-info h3{font-size:26px;font-weight:800;color:#fff}
.contact-desc{color:#9aa2b2;font-size:15px;margin:14px 0 26px}
.contact-list li{display:flex;gap:16px;align-items:center;padding:18px 0;border-bottom:1px solid rgba(255,255,255,.08)}
.ci-ico{flex:none;width:46px;height:46px;border-radius:12px;background:rgba(243,175,13,.16);color:var(--gold-light);font-size:20px;display:flex;align-items:center;justify-content:center}
.contact-list strong{display:block;font-size:15px;color:#fff}
.contact-list em{font-style:normal;color:#aab1bf;font-size:15px}
.contact-list a:hover{color:var(--gold-light)}
.contact-map{position:relative;min-height:340px}
.map-placeholder{
  height:100%;min-height:340px;border-radius:var(--radius);border:1px solid rgba(255,255,255,.14);
  background:
    linear-gradient(0deg,rgba(255,255,255,.04),rgba(255,255,255,.04)),
    repeating-linear-gradient(0deg,transparent,transparent 39px,rgba(255,255,255,.05) 39px,rgba(255,255,255,.05) 40px),
    repeating-linear-gradient(90deg,transparent,transparent 39px,rgba(255,255,255,.05) 39px,rgba(255,255,255,.05) 40px),
    #1b2230;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:#e9ecf2;
  text-align:center;padding:30px;position:relative;
}
.map-placeholder::after{content:"";width:26px;height:26px;margin-bottom:6px;background:var(--gold);border-radius:50% 50% 50% 0;transform:rotate(-45deg);border:3px solid #fff}
.map-badge{position:absolute;top:16px;right:16px;font-size:12px;color:#ffe8ad;border:1px solid var(--gold);padding:4px 10px;border-radius:999px}
.map-placeholder p{font-size:18px;font-weight:700}
.map-placeholder em{font-style:normal;font-size:13px;color:#8f97a5}

/* ============ 页脚 ============ */
.site-footer{background:#0b0e15;color:#8f97a5}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding:64px 0 40px}
.footer-brand img{height:46px;filter:grayscale(1) brightness(2)}
.footer-brand p{margin-top:16px;font-size:14px;letter-spacing:1px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:26px;height:2px;background:var(--gold)}
.footer-col a,.footer-col span{display:block;font-size:14px;margin-bottom:11px;transition:color .2s}
.footer-col a:hover{color:var(--gold-light)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:22px 0;font-size:13px;text-align:center}

/* ============ 响应式 ============ */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

@media (max-width:1024px){
  :root{--pad:80px}
  .about-grid,.product-row{grid-template-columns:1fr;gap:40px}
  .row-rev .product-media{order:0}
  .service-grid,.contact-grid{grid-template-columns:1fr}
  .about-media{max-width:560px}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  :root{--pad:64px;--header-h:68px}
  .brand img{height:38px}
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:var(--header-h);left:0;right:0;flex-direction:column;align-items:flex-start;
    background:#fff;padding:14px 24px 24px;gap:4px;box-shadow:0 20px 40px rgba(0,0,0,.12);
    transform:translateY(-130%);transition:transform .4s var(--ease);opacity:0;pointer-events:none;
  }
  .main-nav.open{transform:none;opacity:1;pointer-events:auto}
  .main-nav a{width:100%;padding:14px 6px;border-bottom:1px solid var(--line)}
  .main-nav a::after{display:none}
  .main-nav .nav-tmall{margin-left:0;margin-top:10px;border-radius:10px;text-align:center}
  .hero-arrow{display:none}
  .about-stats{grid-template-columns:repeat(2,1fr)}
  .product-meta{width:100%}
  .product-meta div{flex:1}
  .footer-inner{grid-template-columns:1fr;gap:30px}
}