/* ===== MUYENDA 品牌官网样式 · 深海军蓝+能量金品牌体系 ===== */
:root{
  --navy:#091938;
  --blue:#BB8B22;
  --blue-deep:#061126;
  --cyan:#BB8B22;
  --ink:#263342;
  --gray:#667281;
  --line:#DCE2E8;
  --bg-alt:#F5F7F9;
  --white:#ffffff;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{font-family:"Microsoft YaHei","PingFang SC","Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--white);line-height:1.7;overflow-x:hidden}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{max-width:1180px;margin:0 auto;padding:0 24px}

/* ---- 语言切换 ---- */
body:not(.lang-en) .en{display:none}
body.lang-en .zh{display:none}

/* ---- 导航 ---- */
.nav{position:sticky;top:0;z-index:100;background:rgba(9,25,56,.96);backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav-inner{max-width:1180px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{height:32px;width:auto}
.brand-mark{color:#fff;font-size:22px;font-weight:800;letter-spacing:2px}
.brand-sub{color:rgba(255,255,255,.65);font-size:13px;letter-spacing:4px}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{color:rgba(255,255,255,.8);font-size:15px;padding:6px 2px;border-bottom:2px solid transparent;transition:.2s}
.nav-links a:hover,.nav-links a.active{color:#fff;border-bottom-color:var(--cyan)}
.nav-phone{display:flex;align-items:center;gap:7px;color:var(--cyan);font-size:16px;font-weight:700;letter-spacing:.5px;transition:.2s}
.nav-phone:hover{color:#fff}
.nav-phone svg{flex:none;transform:rotate(-8deg)}
.lang-toggle{background:transparent;border:1px solid rgba(255,255,255,.4);color:#fff;border-radius:3px;padding:4px 12px;font-size:13px;cursor:pointer;letter-spacing:1px;transition:.2s}
.lang-toggle:hover{background:var(--cyan);border-color:var(--cyan);color:var(--navy)}

/* ---- Hero ---- */
.hero{position:relative;min-height:560px;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:url('img/hero.jpg') center/cover no-repeat}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(9,25,56,.93) 0%,rgba(16,42,92,.74) 55%,rgba(9,25,56,.45) 100%)}
.hero-content{position:relative;max-width:1180px;margin:0 auto;padding:80px 24px;width:100%}
.hero-kicker{display:inline-block;font-size:14px;letter-spacing:3px;color:var(--cyan);border:1px solid rgba(187,139,34,.5);padding:5px 16px;margin-bottom:22px;background:rgba(187,139,34,.08)}
.hero h1{font-size:46px;line-height:1.35;font-weight:800;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--cyan)}
.hero-desc{font-size:18px;color:rgba(255,255,255,.85);margin-bottom:36px;letter-spacing:1px}
.hero-cta{display:flex;gap:16px}
.btn{display:inline-block;padding:13px 34px;font-size:16px;border-radius:3px;transition:.2s;letter-spacing:1px}
.btn-primary{background:var(--cyan);color:var(--navy);font-weight:700}
.btn-primary:hover{background:#fff}
.btn-ghost{border:1px solid rgba(255,255,255,.6);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.15)}

/* ---- 数据带 ---- */
.stats{background:var(--navy);color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:34px 24px;text-align:center}
.stat b{display:block;font-size:34px;color:var(--cyan);font-weight:800}
.stat span{font-size:14px;color:rgba(255,255,255,.75);letter-spacing:2px}

/* ---- 通用节 ---- */
.section{padding:84px 0}
.section-alt{background:var(--bg-alt)}
.section-dark{background:linear-gradient(135deg,#061126 0%,#102A5C 100%);color:#fff}
.section-head{text-align:center;margin-bottom:52px}
.section-tag{display:inline-block;font-size:13px;letter-spacing:5px;color:var(--blue);font-weight:700;position:relative;padding-bottom:10px;margin-bottom:6px}
.section-dark .section-tag{color:var(--cyan)}
.section-tag::after{content:"";position:absolute;left:50%;transform:translateX(-50%) skewX(-15deg);bottom:0;width:46px;height:3px;background:var(--cyan)}
.section-head h2{font-size:32px;font-weight:800}
.section-dark .section-head h2{color:#fff}
.section-sub{color:var(--gray);margin-top:12px;font-size:16px}
.section-dark .section-sub{color:rgba(255,255,255,.7)}

/* ---- 三大业务 ---- */
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.biz-card{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;box-shadow:0 4px 18px rgba(9,25,56,.06);transition:.25s;display:flex;flex-direction:column}
.biz-card:hover{transform:translateY(-6px);box-shadow:0 14px 34px rgba(9,25,56,.16);border-color:rgba(187,139,34,.35)}
.biz-img{height:220px;overflow:hidden}
.biz-img img{width:100%;height:100%;object-fit:cover}
.biz-body{padding:26px 24px 30px;flex:1;display:flex;flex-direction:column}
.biz-body h3{font-size:20px;margin-bottom:12px;color:var(--navy)}
.biz-body p{font-size:14.5px;color:var(--gray);flex:1}
.biz-tags{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px}
.biz-tags i{font-style:normal;font-size:12px;color:var(--blue);background:rgba(187,139,34,.08);border:1px solid rgba(187,139,34,.22);padding:3px 10px;border-radius:2px}

/* ---- 更多领域 ---- */
.field-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.field-card{background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:4px;padding:22px 24px;transition:.2s}
.field-card:hover{border-left-color:var(--cyan);box-shadow:0 8px 22px rgba(9,25,56,.12);transform:translateX(4px)}
.field-card b{display:block;font-size:17px;color:var(--navy);margin-bottom:6px}
.field-card span{font-size:13.5px;color:var(--gray)}

/* ---- 为什么选我们 ---- */
.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.why-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:30px;transition:.2s}
.why-card:hover{box-shadow:0 10px 28px rgba(9,25,56,.1)}
.why-icon{font-size:30px;margin-bottom:14px}
.why-card h3{font-size:19px;color:var(--navy);margin-bottom:10px}
.why-card p{font-size:14.5px;color:var(--gray)}

/* ---- 定制流程 ---- */
.process-flow{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
.step{flex:1;min-width:150px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.15);border-radius:6px;padding:26px 18px;text-align:center;position:relative;transition:.2s}
.step:hover{background:rgba(187,139,34,.15);border-color:#BB8B22}
.step b{display:block;font-size:26px;color:var(--cyan);font-weight:800;margin-bottom:8px}
.step span{font-size:15px;letter-spacing:2px}
.process-cta{text-align:center;margin-top:46px}

/* ---- 页脚 ---- */
.footer{background:#061126;color:rgba(255,255,255,.75)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1.2fr;gap:40px;padding:56px 24px 40px}
.footer-brand{font-size:26px;margin-bottom:14px;display:flex;align-items:center;gap:12px}
.footer-logo{height:36px;width:auto}
.footer-brand span{color:var(--cyan)}
.footer-desc{font-size:14px;max-width:420px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:2px}
.footer-col a,.footer-col p{display:block;font-size:14px;margin-bottom:10px;transition:.2s}
.footer-col a:hover{color:var(--cyan)}
.footer-bar{border-top:1px solid rgba(255,255,255,.1);text-align:center;padding:18px;font-size:13px;color:rgba(255,255,255,.45)}

/* ---- 产品页 ---- */
.page-hero{background:linear-gradient(120deg,var(--navy) 0%,var(--blue-deep) 100%);color:#fff;padding:64px 0;text-align:center}
.page-hero h1{font-size:34px;font-weight:800;margin-bottom:8px}
.page-hero p{color:rgba(255,255,255,.75);letter-spacing:1px}
.prod-row{display:grid;grid-template-columns:1fr 1.2fr;gap:44px;align-items:center}
.prod-row.rev{grid-template-columns:1.2fr 1fr}
.prod-row.rev .prod-img{order:2}
.prod-img img{border-radius:8px;box-shadow:0 12px 32px rgba(9,25,56,.14)}
.prod-info h2{font-size:26px;color:var(--navy);margin-bottom:14px}
.prod-info>p{color:var(--gray);font-size:15px;margin-bottom:16px}
.prod-list{list-style:none;margin-top:16px}
.prod-list li{padding:8px 0 8px 26px;position:relative;font-size:14px;color:var(--ink);border-bottom:1px dashed var(--line)}
.prod-list li::before{content:"";position:absolute;left:2px;top:15px;width:8px;height:8px;background:var(--cyan);transform:rotate(45deg)}
.field-detail{background:#fff;border:1px solid var(--line);border-radius:6px;padding:24px 26px;transition:.2s}
.field-detail:hover{box-shadow:0 8px 24px rgba(9,25,56,.1)}
.field-detail b{display:block;font-size:17px;color:var(--navy);margin-bottom:8px;padding-left:12px;border-left:4px solid var(--blue)}
.field-detail span{font-size:13.5px;color:var(--gray)}

/* ---- 关于页 ---- */
.about-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:40px;align-items:start}
.about-text h2{color:var(--navy)}
.about-text p{color:var(--gray);font-size:15px;margin-bottom:14px}
.about-text strong{color:var(--blue)}
.about-side{display:flex;flex-direction:column;gap:20px}
.vision-card{background:linear-gradient(135deg,var(--navy),var(--blue-deep));color:#fff;border-radius:8px;padding:26px 28px}
.vision-card h3{font-size:17px;color:var(--cyan);margin-bottom:10px;letter-spacing:2px}
.vision-card p{font-size:14px;color:rgba(255,255,255,.85)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px}
.contact-info{background:var(--bg-alt);border:1px solid var(--line);border-radius:8px;padding:30px}
.contact-info h3{font-size:18px;color:var(--navy);margin-bottom:16px}
.contact-info p{font-size:14.5px;color:var(--gray);margin-bottom:10px}
.contact-form{background:#fff;border:1px dashed rgba(187,139,34,.4);border-radius:8px;padding:30px;display:flex;align-items:center}
.form-note p{font-size:14.5px;color:var(--gray)}

/* ---- 案例页 ---- */
.case-list{display:flex;flex-direction:column;gap:30px}
.case-card{display:grid;grid-template-columns:1fr 1.6fr;gap:32px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:26px;transition:.2s}
.case-card:hover{box-shadow:0 12px 32px rgba(9,25,56,.1)}
.case-img img{border-radius:6px;height:100%;object-fit:cover;min-height:220px}
.case-body h2{font-size:21px;color:var(--navy);margin:10px 0 12px}
.case-body>p{font-size:14.5px;color:var(--gray);margin-bottom:14px}
.case-meta{display:flex;align-items:center;gap:12px}
.case-meta time{font-size:13px;color:var(--gray)}
.case-tag{font-size:12px;padding:3px 12px;border-radius:2px;background:rgba(187,139,34,.1);color:#8a6413;border:1px solid rgba(187,139,34,.35)}
.case-tag.gold{background:rgba(187,139,34,.14)}
.case-specs{display:grid;grid-template-columns:repeat(2,1fr);gap:8px 20px;list-style:none}
.case-specs li{font-size:13px;color:var(--ink);background:var(--bg-alt);border-radius:4px;padding:8px 12px;display:flex;gap:10px;align-items:baseline}
.case-specs b{color:var(--navy);flex:none}

/* ---- 资讯页 ---- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;display:flex;flex-direction:column;transition:.2s}
.news-card:hover{transform:translateY(-5px);box-shadow:0 14px 32px rgba(9,25,56,.12);border-color:rgba(187,139,34,.4)}
.news-card:not(.news-coming):hover h2{color:#BB8B22}
.news-coming{opacity:.72}
.news-cover{height:180px;overflow:hidden}
.news-cover img{width:100%;height:100%;object-fit:cover}
.news-body{padding:22px;flex:1;display:flex;flex-direction:column}
.news-body h2{font-size:17.5px;color:var(--navy);margin:10px 0 10px;line-height:1.5}
.news-body p{font-size:13.5px;color:var(--gray)}

/* ---- 文章页 ---- */
.article-body{max-width:840px}
.article-body .lead{font-size:17px;color:var(--ink);border-left:4px solid #BB8B22;background:var(--bg-alt);padding:18px 22px;border-radius:0 6px 6px 0;margin-bottom:34px}
.article-body h2{font-size:21px;color:var(--navy);margin:34px 0 14px;padding-left:14px;border-left:4px solid #BB8B22}
.article-body p{font-size:15.5px;color:#3d4a59;margin-bottom:14px}
.article-cta{display:flex;gap:16px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line);flex-wrap:wrap}
.btn-ghost-dark{border:1px solid var(--navy);color:var(--navy)}
.btn-ghost-dark:hover{background:var(--navy);color:#fff}

/* ---- 响应式 ---- */
@media(max-width:760px){
  .brand-sub{display:none}
  .nav-links{gap:16px}
  .nav-links a{font-size:13.5px}
  .nav-phone{font-size:14px;gap:5px}
  .nav-phone svg{width:13px;height:13px}
}
@media(max-width:920px){
  .biz-grid,.field-grid,.why-grid{grid-template-columns:1fr 1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:34px}
  .footer-grid{grid-template-columns:1fr}
  .prod-row,.prod-row.rev{grid-template-columns:1fr;gap:26px}
  .prod-row.rev .prod-img{order:0}
  .about-grid,.contact-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr;max-width:560px;margin:0 auto}
  .case-card{grid-template-columns:1fr;gap:18px;padding:20px}
  .case-specs{grid-template-columns:1fr}
}
@media(max-width:600px){
  /* 导航改两行：logo一行 / 菜单+电话+EN一行 */
  .nav-inner{flex-wrap:wrap;height:auto;padding:10px 14px;row-gap:6px}
  .brand-mark{font-size:16px;letter-spacing:1px}
  .brand-sub{display:none}
  .brand-logo{height:28px}
  .nav-links{width:100%;flex-wrap:wrap;justify-content:center;gap:8px 14px}
  .nav-links a{font-size:13.5px;padding:4px 2px}
  .nav-phone{font-size:14px;gap:5px}
  .nav-phone svg{width:13px;height:13px}
  .lang-toggle{padding:3px 10px}
  .nav{position:static}
  .biz-grid,.field-grid,.why-grid{grid-template-columns:1fr}
  .hero{min-height:420px}
  .hero-content{padding:56px 20px}
  .hero h1{font-size:27px}
  .hero-desc{font-size:15px}
  .section{padding:48px 0}
  .section-head h2{font-size:24px}
  .page-hero h1{font-size:26px}
  .step{min-width:45%}
  .stats-grid{grid-template-columns:repeat(2,1fr);padding:24px 14px;gap:14px}
  .stat b{font-size:27px}
  .footer-grid{padding:40px 20px 30px;gap:26px}
  .contact-info,.contact-form{padding:22px}
  .prod-list li{font-size:13px}
  .biz-body,.field-detail{padding:20px 18px}
}

/* ---- 案例注释 ---- */
.cases-note{margin-top:28px;font-size:13px;color:var(--gray);text-align:center}