/* ============================================================
   腾龙食品 企业官网 共享样式
   ============================================================ */
:root{
  --primary:#C7442A;
  --primary-dark:#A8351F;
  --green:#4E7A5A;
  --green-dark:#3C6147;
  --cream:#FAF5EC;
  --cream-2:#F3EADA;
  --ink:#33261F;
  --ink-2:#6B5A4E;
  --line:#E6D9C6;
  --dark:#2E231D;
  --white:#FFFFFF;
  --radius:14px;
  --shadow:0 10px 30px rgba(51,38,31,.10);
  --shadow-lg:0 18px 45px rgba(51,38,31,.16);
  --maxw:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","微软雅黑","Hiragino Sans GB",sans-serif;
  color:var(--ink);
  background:var(--cream);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:"Noto Serif SC","Songti SC","STSong","SimSun",serif;
  line-height:1.35;
  font-weight:700;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul{list-style:none}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  max-width:var(--maxw);margin:0 auto;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;
  height:72px;
}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{
  width:42px;height:42px;border-radius:10px;
  background:linear-gradient(135deg,var(--primary),#E07B2F);
  display:flex;align-items:center;justify-content:center;
  color:#fff;flex:none;
}
.logo-text{font-family:"Noto Serif SC","Songti SC",serif;font-weight:700;font-size:22px;letter-spacing:1px}
.logo-text small{display:block;font-family:inherit;font-size:11px;font-weight:400;color:var(--ink-2);letter-spacing:3px;margin-top:1px}
.nav{display:flex;gap:6px}
.nav a{
  display:block;padding:8px 16px;border-radius:8px;
  font-size:15px;color:var(--ink-2);font-weight:500;transition:.2s;
}
.nav a:hover,.nav a.active{color:var(--primary);background:#FBEDE4}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:40px;height:40px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:5px auto;transition:.25s}

/* ---------- 通用区块 ---------- */
.section{padding:84px 0}
.section-alt{background:var(--cream-2)}
.section-head{text-align:center;max-width:680px;margin:0 auto 48px}
.section-head .eyebrow{
  display:inline-block;color:var(--primary);font-size:13px;letter-spacing:4px;
  font-weight:600;margin-bottom:10px;
}
.section-head h2{font-size:34px;color:var(--ink)}
.section-head p{color:var(--ink-2);margin-top:12px}

.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 26px;border-radius:999px;font-size:15px;font-weight:600;
  transition:.25s;cursor:pointer;border:0;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.75)}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn-dark{background:var(--dark);color:#fff}
.btn-dark:hover{background:#45362C;transform:translateY(-2px);box-shadow:var(--shadow)}

/* ---------- 首页 Hero ---------- */
.hero{
  position:relative;min-height:560px;
  display:flex;align-items:center;
  background-size:cover;background-position:center;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(30,20,15,.62) 0%,rgba(30,20,15,.25) 55%,rgba(30,20,15,.05) 100%);
}
.hero-inner{position:relative;max-width:var(--maxw);margin:0 auto;padding:0 24px;width:100%}
.hero h1{
  color:#fff;font-size:46px;max-width:640px;margin-bottom:16px;
  text-shadow:0 2px 14px rgba(0,0,0,.35);
}
.hero p{color:#F5E9DC;font-size:18px;max-width:520px;margin-bottom:30px}
.hero .btns{display:flex;gap:14px;flex-wrap:wrap}
.hero .badge{
  display:inline-block;color:#FFE3C2;font-size:13px;letter-spacing:3px;
  border:1px solid rgba(255,227,194,.5);border-radius:999px;
  padding:5px 14px;margin-bottom:20px;
}

/* ---------- 首页简介 ---------- */
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.intro-grid .photo{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg)}
.intro-grid .photo img{width:100%;height:400px;object-fit:cover}
.intro-grid .photo::after{
  content:"";position:absolute;inset:0;border:1px solid rgba(255,255,255,.25);border-radius:var(--radius);pointer-events:none;
}
.intro-text h2{font-size:32px;margin-bottom:16px}
.intro-text p{color:var(--ink-2);margin-bottom:14px}
.intro-text .more{margin-top:22px}
.feature-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.tag{
  background:#FBEDE4;color:var(--primary);border-radius:999px;
  padding:6px 14px;font-size:13px;font-weight:600;
}

/* ---------- 产品卡片 ---------- */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.product-card{
  background:#fff;border-radius:var(--radius);overflow:hidden;
  box-shadow:0 4px 16px rgba(51,38,31,.07);
  transition:.3s;
}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.product-card .p-img{height:230px;overflow:hidden}
.product-card .p-img img{width:100%;height:100%;object-fit:cover;transition:.5s}
.product-card:hover .p-img img{transform:scale(1.06)}
.product-card .p-body{padding:20px 22px 24px}
.product-card h3{font-size:19px;margin-bottom:6px}
.product-card p{color:var(--ink-2);font-size:14px}
.product-card .p-link{display:inline-block;margin-top:12px;color:var(--primary);font-weight:600;font-size:14px}
.product-card .p-link:hover{color:var(--primary-dark)}

/* ---------- 优势特性 ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.feature-item{
  background:#fff;border-radius:var(--radius);padding:32px 26px;
  box-shadow:0 4px 16px rgba(51,38,31,.06);text-align:center;transition:.3s;
}
.feature-item:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.feature-item .icon{
  width:58px;height:58px;margin:0 auto 16px;border-radius:16px;
  background:linear-gradient(135deg,#FBEDE4,#F7D9C6);
  display:flex;align-items:center;justify-content:center;color:var(--primary);
}
.feature-item h3{font-size:18px;margin-bottom:8px}
.feature-item p{color:var(--ink-2);font-size:14px}

/* ---------- 新闻卡片 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news-card{
  background:#fff;border-radius:var(--radius);overflow:hidden;
  box-shadow:0 4px 16px rgba(51,38,31,.07);transition:.3s;
  display:flex;flex-direction:column;
}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.news-card .n-img{height:180px;overflow:hidden}
.news-card .n-img img{width:100%;height:100%;object-fit:cover;transition:.5s}
.news-card:hover .n-img img{transform:scale(1.06)}
.news-card .n-body{padding:22px;display:flex;flex-direction:column;flex:1}
.news-card .n-date{color:var(--primary);font-size:13px;font-weight:600;letter-spacing:1px}
.news-card h3{font-size:18px;line-height:1.5;margin:8px 0}
.news-card p{color:var(--ink-2);font-size:14px;flex:1}
.news-card .n-link{margin-top:14px;color:var(--primary);font-weight:600;font-size:14px}

/* ---------- 联系条 ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--dark) 0%,#4A382C 100%);
  color:#fff;border-radius:var(--radius);overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;
  gap:30px;padding:46px 52px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;font-size:26px;margin-bottom:8px}
.cta-band p{color:#DCC9B4}
.cta-band .btn{margin-top:4px}

/* ---------- 页面标题 ---------- */
.page-hero{
  background:linear-gradient(120deg,#3A2A20,#5A3F2E);
  color:#fff;padding:64px 0;
}
.page-hero h1{font-size:36px;color:#fff}
.page-hero p{color:#E4D3C0;margin-top:10px;max-width:640px}
.breadcrumb{font-size:13px;color:#CBB49B;margin-top:14px}
.breadcrumb a{color:#EAD9C4}
.breadcrumb a:hover{color:#fff}

/* ---------- 关于页 ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-grid .photo{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg)}
.about-grid .photo img{width:100%;height:380px;object-fit:cover}
.about-text h2{font-size:30px;margin-bottom:16px}
.about-text p{color:var(--ink-2);margin-bottom:14px}

/* 时间轴：三列 grid，时间/轴/内容 */
.timeline{display:grid;grid-template-columns:150px 90px 1fr;gap:0;max-width:900px;margin:0 auto}
.tl-item{display:contents}
.tl-time{padding:26px 0;font-family:"Noto Serif SC",serif;font-weight:700;font-size:17px;color:var(--primary);text-align:right;padding-right:20px}
.tl-axis{
  position:relative;display:flex;justify-content:center;
  padding:0 0 0 0;
}
.tl-axis::before{
  content:"";position:absolute;top:0;bottom:0;width:2px;
  background:linear-gradient(180deg,transparent,var(--primary) 8%,var(--primary) 92%,transparent);
}
.tl-item:first-child .tl-axis::before{top:50%}
.tl-item:last-child .tl-axis::before{bottom:50%}
.tl-dot{
  position:relative;z-index:1;align-self:center;
  width:16px;height:16px;border-radius:50%;
  background:var(--cream);border:3px solid var(--primary);
}
.tl-body{padding:26px 0 26px 24px;border-bottom:1px dashed var(--line)}
.tl-body h3{font-size:18px;margin-bottom:6px}
.tl-body p{color:var(--ink-2);font-size:14px}
.tl-item:last-child .tl-body{border-bottom:0}

/* 企业价值观 */
.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.value-item{background:#fff;border-radius:var(--radius);padding:34px 28px;text-align:center;box-shadow:0 4px 16px rgba(51,38,31,.06)}
.value-item .num{font-family:"Noto Serif SC",serif;font-size:40px;color:#E8B44A;font-weight:700;line-height:1}
.value-item h3{font-size:19px;margin:14px 0 10px}
.value-item p{color:var(--ink-2);font-size:14px}

/* ---------- 产品页 ---------- */
.cat-title{display:flex;align-items:center;gap:16px;margin-bottom:34px}
.cat-title::after{content:"";flex:1;height:1px;background:var(--line)}
.cat-title h2{font-size:28px}
.cat-title span{color:var(--ink-2);font-size:14px}
.product-grid-4{grid-template-columns:repeat(4,1fr)}
.product-grid-2{grid-template-columns:repeat(2,1fr);gap:30px}
.product-large{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:0 4px 16px rgba(51,38,31,.07);display:grid;grid-template-columns:1fr 1fr}
.product-large .p-img{height:320px}
.product-large .p-img img{width:100%;height:100%;object-fit:cover}
.product-large .p-body{padding:36px}
.product-large h3{font-size:24px;margin-bottom:10px}
.product-large p{color:var(--ink-2);margin-bottom:12px}
.product-large .spec{color:var(--green);font-size:14px;font-weight:600}
.note-box{
  background:#FBEDE4;border:1px dashed #E8A37E;border-radius:var(--radius);
  padding:18px 22px;color:#8A4A28;font-size:14px;margin-bottom:40px;
}

/* ---------- 新闻列表 ---------- */
.news-list{max-width:960px;margin:0 auto;display:flex;flex-direction:column;gap:22px}
.news-item{
  background:#fff;border-radius:var(--radius);padding:28px 32px;
  box-shadow:0 4px 16px rgba(51,38,31,.06);
  display:grid;grid-template-columns:110px 1fr;gap:24px;align-items:center;transition:.25s;
}
.news-item:hover{transform:translateX(6px);box-shadow:var(--shadow)}
.news-item .ndate{font-family:"Noto Serif SC",serif;text-align:center;border-right:1px solid var(--line);padding-right:20px}
.news-item .ndate b{display:block;font-size:30px;color:var(--primary);line-height:1.2}
.news-item .ndate span{font-size:13px;color:var(--ink-2)}
.news-item h2{font-size:21px;margin-bottom:6px}
.news-item h2 a:hover{color:var(--primary)}
.news-item p{color:var(--ink-2);font-size:14px}

/* ---------- 文章页 ---------- */
.article{max-width:820px;margin:0 auto}
.article-head{text-align:center;padding-bottom:36px;border-bottom:1px solid var(--line);margin-bottom:40px}
.article-head .tag-row{display:flex;justify-content:center;gap:12px;margin-bottom:16px;font-size:13px;color:var(--ink-2)}
.article-head h1{font-size:32px;line-height:1.5}
.article-head .meta{margin-top:16px;color:var(--ink-2);font-size:14px}
.article-head .meta span{margin:0 10px}
.article-body{font-size:17px;color:#3F3129}
.article-body p{margin-bottom:20px;text-align:justify}
.article-body h2{font-size:24px;margin:36px 0 16px;padding-left:14px;border-left:4px solid var(--primary)}
.article-body h3{font-size:19px;margin:26px 0 12px}
.article-body ul,.article-body ol{margin:0 0 20px 1.4em}
.article-body li{margin-bottom:8px}
.article-body img{border-radius:var(--radius);margin:24px 0}
.article-body blockquote{border-left:4px solid #E8B44A;background:#FBF3E3;padding:14px 20px;margin:20px 0;color:#6B5A4E;border-radius:0 10px 10px 0}
.article-tags{margin-top:36px;display:flex;gap:10px;flex-wrap:wrap}
.article-tags .tag{background:#F3EADA;color:var(--ink-2)}
.related-news{margin-top:60px;border-top:1px solid var(--line);padding-top:36px}
.related-news h3{font-size:22px;margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.related-item{background:#fff;border-radius:var(--radius);padding:20px 22px;box-shadow:0 4px 14px rgba(51,38,31,.06);transition:.25s}
.related-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.related-item .rd{font-size:12px;color:var(--ink-2)}
.related-item h4{font-size:16px;line-height:1.5;margin-top:6px}
.related-item a:hover h4{color:var(--primary)}

/* ---------- 联系页 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:start}
.contact-info .ci{
  display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--line);align-items:flex-start;
}
.contact-info .ci:last-child{border-bottom:0}
.contact-info .ci .icon{
  flex:none;width:46px;height:46px;border-radius:12px;background:#FBEDE4;color:var(--primary);
  display:flex;align-items:center;justify-content:center;
}
.contact-info .ci h3{font-size:16px;margin-bottom:2px}
.contact-info .ci p{color:var(--ink-2);font-size:15px}
.form-card{background:#fff;border-radius:var(--radius);padding:38px;box-shadow:var(--shadow)}
.form-card h2{font-size:22px;margin-bottom:6px}
.form-card .sub{color:var(--ink-2);font-size:14px;margin-bottom:24px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.form-group input,.form-group select,.form-group textarea{
  width:100%;border:1.5px solid var(--line);border-radius:10px;
  padding:11px 14px;font-size:15px;font-family:inherit;color:var(--ink);
  background:#FDFBF7;transition:.2s;
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(199,68,42,.12);
}
.form-group textarea{resize:vertical;min-height:120px}
.form-note{font-size:12px;color:var(--ink-2);margin-top:10px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#C9B8A5;margin-top:0}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:64px 24px 40px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:44px}
.site-footer h4{color:#fff;font-size:17px;margin-bottom:18px}
.site-footer .f-desc{font-size:14px;line-height:1.9}
.site-footer ul li{margin-bottom:10px;font-size:14px}
.site-footer ul a:hover{color:#fff}
.f-contact li{display:flex;gap:8px;align-items:flex-start;font-size:14px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);text-align:center;padding:22px 24px;font-size:13px;color:#8F7C6B}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .product-grid,.feature-grid,.news-grid{grid-template-columns:repeat(2,1fr)}
  .value-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .section{padding:60px 0}
  .hero{min-height:460px}
  .hero h1{font-size:34px}
  .nav{
    position:fixed;top:72px;left:0;right:0;background:#fff;
    flex-direction:column;padding:14px 24px 20px;
    box-shadow:0 18px 30px rgba(51,38,31,.14);
    transform:translateY(-130%);transition:.3s;border-top:1px solid var(--line);
  }
  .nav.open{transform:translateY(0)}
  .nav a{padding:12px 10px;border-bottom:1px solid var(--cream-2);border-radius:0}
  .nav-toggle{display:block}
  .intro-grid,.about-grid,.contact-grid,.product-large{grid-template-columns:1fr}
  .intro-grid .photo img,.about-grid .photo img{height:280px}
  .cta-band{flex-direction:column;text-align:center;padding:36px 26px}
  .timeline{grid-template-columns:84px 60px 1fr}
  .tl-time{font-size:15px}
  .news-item{grid-template-columns:1fr;gap:14px;padding:22px}
  .news-item .ndate{border-right:0;border-bottom:1px solid var(--line);text-align:left;padding-bottom:12px;display:flex;gap:10px;align-items:baseline}
  .article-head h1{font-size:26px}
  .article-body{font-size:16px}
  .related-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
}
@media (max-width:560px){
  .product-grid,.feature-grid,.news-grid,.value-grid{grid-template-columns:1fr}
  .section-head h2{font-size:27px}
  .page-hero h1{font-size:29px}
  .hero h1{font-size:30px}
  .hero .btns .btn{padding:10px 20px;font-size:14px}
  .footer-inner{grid-template-columns:1fr}
}