/* ============================================================
   muyuncq.cn · 站点样式
   依据：《muyuncq门户网站_交互式PRD_V0.2》（已评审通过）
   ============================================================ */
:root{
  --orange:#FF6B1A; --orange-deep:#E8540A; --orange-text:#C94A00; --orange-soft:#FFF1E8;
  --ink:#1B2130; --ink-2:#4A5468; --ink-3:#6B7486;
  --line:#E8EBF2; --card:#FFFFFF;
  --dark:#10141F;
  --radius:14px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Segoe UI","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font);color:var(--ink);background:#fff;font-size:14px;line-height:1.65;-webkit-font-smoothing:antialiased}
button{font-family:inherit;cursor:pointer}
button,a,[role="button"]{touch-action:manipulation;-webkit-tap-highlight-color:transparent}
a{color:var(--orange-text)}
:focus-visible{outline:2px solid var(--orange-deep);outline-offset:2px;border-radius:4px}

/* ============ 页头 ============ */
.site-header{background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:22px;padding:0 26px;height:60px;position:sticky;top:0;z-index:20}
.site-logo{display:flex;align-items:center;gap:9px;color:var(--ink);text-decoration:none;font-weight:800;font-size:17px;letter-spacing:.5px;flex-shrink:0}
.site-logo .mark{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,#FF8A3D,var(--orange));color:#fff;font-size:13px;display:flex;align-items:center;justify-content:center;font-weight:700}
.site-logo .en{font-size:11px;color:var(--ink-3);font-weight:500;letter-spacing:.8px}
.site-nav{display:flex;gap:4px;margin-left:auto;overflow-x:auto}
.site-nav a{color:var(--ink-2);text-decoration:none;font-size:14px;padding:6px 13px;border-radius:8px;white-space:nowrap;transition:color .2s,background .2s}
.site-nav a:hover{color:var(--ink);background:#F2F4F8}
.site-nav a.active{color:var(--orange-text);background:var(--orange-soft);font-weight:600}
.header-cta{margin-left:6px;flex-shrink:0}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;border-radius:10px;font-size:14px;font-weight:600;padding:10px 22px;text-decoration:none;transition:background .2s,border-color .2s,color .2s,transform .2s,box-shadow .2s;line-height:1.3}
.btn-primary{background:#C94A00;color:#fff;box-shadow:0 4px 14px rgba(201,74,0,.26)}
.btn-primary:hover{background:#AD4100;transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--orange-text);color:var(--orange-text)}
.btn-sm{padding:7px 16px;font-size:13px}

/* ============ 版心与通用 ============ */
.site-main{max-width:1020px;margin:0 auto;padding:34px 26px 30px;width:100%}
.page-title{font-size:26px;font-weight:800;margin-bottom:6px;text-wrap:balance}
.page-sub{color:var(--ink-2);font-size:14px;margin-bottom:26px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);transition:border-color .2s,box-shadow .2s,transform .2s}
.tag{display:inline-block;font-size:12px;padding:2px 10px;border-radius:20px;background:var(--orange-soft);color:var(--orange-text);font-weight:600}
.tag.gray{background:#F0F2F7;color:var(--ink-2)}
.sec{margin-bottom:42px}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:16px}
.sec-head h2{font-size:21px;font-weight:800}
.sec-head h2::before{content:"";display:inline-block;width:4px;height:18px;background:var(--orange);border-radius:2px;margin-right:10px;vertical-align:-2px}
.sec-head .more{font-size:13px;color:var(--ink-3);text-decoration:none}
.sec-head .more:hover{color:var(--orange-text)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}

/* ============ 首页 ============ */
.hero{background:radial-gradient(720px 320px at 88% -20%,rgba(255,107,26,.10),transparent 60%),linear-gradient(180deg,#FFF9F3,#FFFFFF);padding:68px 26px 58px}
.hero-inner{max-width:1020px;margin:0 auto}
.hero-eyebrow{font-size:14px;color:var(--ink-2);font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:9px}
.hero-eyebrow::before{content:"";width:26px;height:3px;border-radius:2px;background:var(--orange);flex-shrink:0}
.hero h1{font-size:36px;font-weight:800;line-height:1.32;margin-bottom:14px;letter-spacing:.5px;text-wrap:balance}
.hero h1 em{font-style:normal;color:var(--orange-deep)}
.hero-sub{font-size:16px;color:var(--ink-2);margin-bottom:30px;max-width:560px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}

/* 案例卡片 */
.proj-card{overflow:hidden;text-align:left;padding:0}
.proj-card .thumb{height:110px;position:relative;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:15px;letter-spacing:1px}
.proj-card .body{padding:14px 16px}
.proj-card h3{font-size:15px;margin-bottom:5px}
.proj-card p{font-size:13px;color:var(--ink-2);margin-bottom:10px}
.proj-card .meta{display:flex;gap:6px;flex-wrap:wrap}
.proj-card .foot{margin-top:11px;padding-top:10px;border-top:1px dashed var(--line)}
.acc{font-size:12.5px;font-weight:600;color:var(--orange-text)}
.acc.dim{color:var(--ink-3);font-weight:500}
.proj-card.is-click{cursor:pointer}
.proj-card.is-click:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(16,20,31,.12);border-color:#F0B48C}
.proj-card[data-project]:not(.is-click){cursor:default}

/* 服务小卡（首页） */
.svc-mini{padding:20px}
.svc-mini:hover{border-color:#F0B48C;box-shadow:0 6px 20px rgba(255,107,26,.10);transform:translateY(-2px)}
.svc-mini .ico{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,#FFE3D1,#FFD0B5);display:flex;align-items:center;justify-content:center;font-size:19px;margin-bottom:12px}
.svc-mini h3{font-size:15px;margin-bottom:6px}
.svc-mini p{font-size:13px;color:var(--ink-2);margin-bottom:12px}
.link-btn{background:none;border:none;padding:0;color:var(--orange-text);font-size:13px;font-weight:600;text-decoration:none}
.link-btn:hover{text-decoration:underline}

/* 联系引导带（首页） */
.cta-band{background:var(--orange-soft);border:1px solid #FFDFC2;border-radius:var(--radius);padding:30px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.cta-band h2{font-size:20px;margin-bottom:6px}
.cta-band p{color:#8A5A2B;font-size:13.5px}

/* ============ 服务页 ============ */
.svc-detail{padding:22px;margin-bottom:14px}
.svc-detail:hover{border-color:#F0B48C}
.svc-detail h3{font-size:16px}
.svc-detail .head{display:flex;align-items:center;gap:10px;margin-bottom:8px;flex-wrap:wrap}
.svc-detail .ico{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,#FFE3D1,#FFD0B5);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.svc-detail .lead{font-size:13.5px;color:var(--ink-2);margin-bottom:10px}
.svc-detail ul{list-style:none;font-size:13px;color:var(--ink-2)}
.svc-detail ul li{padding-left:18px;position:relative;margin-bottom:3px}
.svc-detail ul li::before{content:"";position:absolute;left:2px;top:9px;width:6px;height:6px;border-radius:2px;background:var(--orange)}
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;counter-reset:step}
.flow-step{padding:18px 16px;position:relative;counter-increment:step;overflow:hidden}
.flow-step::before{content:"0" counter(step);font-size:26px;font-weight:800;color:var(--orange-soft);-webkit-text-stroke:1px #F0A468;position:absolute;top:10px;right:12px;opacity:.85}
.flow-step h3{font-size:14.5px;margin-bottom:5px}
.flow-step p{font-size:12.5px;color:var(--ink-2)}
.faq-item{margin-bottom:10px;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:15px 18px;font-size:14px;font-weight:600;display:flex;justify-content:space-between;align-items:center;gap:10px;color:var(--ink)}
.faq-q:hover{color:var(--orange-text)}
.faq-q .arr{transition:transform .25s;color:var(--orange-text);font-size:15px;flex-shrink:0}
.faq-item.open .arr{transform:rotate(90deg)}
.faq-item.open .faq-q{color:var(--orange-text)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;font-size:13px;color:var(--ink-2)}
.faq-item.open .faq-a{max-height:240px}
.faq-a div{padding:0 18px 15px}

/* ============ 案例页 ============ */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.filter-btn{background:#fff;border:1px solid var(--line);border-radius:20px;padding:6px 16px;font-size:13px;color:var(--ink-2);transition:border-color .2s,color .2s,background .2s}
.filter-btn:hover{border-color:var(--orange-text);color:var(--orange-text)}
.filter-btn.active{background:#C94A00;border-color:#C94A00;color:#fff;font-weight:600}
.proj-count{font-size:12.5px;color:var(--ink-3);margin:0 0 16px}

/* ============ 关于页 ============ */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:14px;align-items:start}
.about-card{padding:26px}
.about-card h3{font-size:16px;margin-bottom:12px}
.about-card p{font-size:13.5px;color:var(--ink-2);margin-bottom:10px}
.kv{list-style:none;font-size:13.5px;margin-top:16px}
.kv li{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px dashed var(--line)}
.kv li:last-child{border:none}
.kv .k{color:var(--ink-3);white-space:nowrap}
.kv .v{font-weight:600;text-align:right}
.tbd{color:#8A5A2B;font-size:11px;border:1px dashed #E8B98A;border-radius:4px;padding:1px 6px;margin-left:8px;background:#FFF8EE;font-weight:500;white-space:nowrap}
.coop{list-style:none;margin-top:4px}
.coop li{display:flex;gap:10px;margin-bottom:14px;color:var(--ink-2);font-size:13.5px}
.coop .n{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--orange-soft);color:var(--orange-text);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:2px}
.coop b{color:var(--ink)}

/* ============ 联系页 ============ */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px;align-items:stretch}
.contact-card{padding:26px;display:flex;flex-direction:column}
.contact-card h3{font-size:16px;margin-bottom:16px}
.contact-line{display:flex;gap:12px;margin-bottom:18px;align-items:flex-start}
.contact-line .ico{width:38px;height:38px;border-radius:10px;background:var(--orange-soft);display:flex;align-items:center;justify-content:center;font-size:17px;flex-shrink:0}
.contact-line .k{font-size:12px;color:var(--ink-3);margin-bottom:2px}
.contact-line .v{font-size:14.5px;font-weight:600}
.contact-card .btn{margin-top:auto;align-self:flex-start}
.contact-note{font-size:13px;color:var(--ink-3);margin-top:16px}

/* ============ 页脚 ============ */
.site-footer{background:#F5F6F8;color:#5D6678;margin-top:26px;border-top:1px solid var(--line)}
.footer-inner{max-width:1020px;margin:0 auto;padding:34px 26px 20px;display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:26px}
.site-footer h4{color:var(--ink);font-size:13.5px;margin-bottom:12px}
.site-footer p,.site-footer a{font-size:13px;color:#5D6678;text-decoration:none;line-height:2.1}
.site-footer a:hover{color:var(--orange-text)}
.footer-nav{list-style:none}
.footer-brand{display:flex;align-items:center;gap:9px;color:var(--ink);font-weight:800;font-size:16px;margin-bottom:8px}
.footer-brand .mark{width:24px;height:24px;border-radius:7px;background:linear-gradient(135deg,#FF8A3D,var(--orange));color:#fff;font-size:12px;display:flex;align-items:center;justify-content:center;font-weight:700}
.beian-bar{border-top:1px solid #E8EBF2;padding:14px 26px;text-align:center;font-size:12px;color:#5D6678}
.beian-bar a{color:#5D6678;text-decoration:none}
.beian-bar a:hover{color:var(--orange-text)}

/* ============ 二维码弹窗 ============ */
.qr-mask{position:fixed;inset:0;background:rgba(16,20,31,.52);display:flex;align-items:center;justify-content:center;z-index:60;opacity:0;transition:opacity .22s;overscroll-behavior:contain}
.qr-mask.show{opacity:1}
.qr-mask[hidden]{display:none}
.qr-dialog{position:relative;background:#fff;border-radius:18px;padding:28px 30px 24px;width:min(330px,88vw);text-align:center;box-shadow:0 24px 64px rgba(16,20,31,.32);transform:translateY(10px) scale(.96);transition:transform .22s}
.qr-mask.show .qr-dialog{transform:none}
.qr-close{position:absolute;top:10px;right:10px;width:30px;height:30px;border:none;background:#F2F4F8;border-radius:8px;color:var(--ink-2);font-size:13px;line-height:1}
.qr-close:hover{background:#E8EBF2;color:var(--ink)}
.qr-dialog h3{font-size:16px;margin-bottom:16px;padding:0 26px}
.qr-art{width:184px;height:184px;background:#fff;border:1px solid var(--line);border-radius:12px;position:relative;margin:0 auto 14px;overflow:hidden}
.qr-art::before{content:"";position:absolute;inset:14px;background-image:radial-gradient(circle,#242C40 2.7px,transparent 2.9px);background-size:15px 15px;background-position:4px 4px}
.qr-art .f{position:absolute;width:40px;height:40px;background:#fff;border:8px solid #1B2130;border-radius:7px;z-index:2}
.qr-art .f::after{content:"";position:absolute;inset:4px;background:#1B2130;border-radius:3px}
.qr-art .f1{top:12px;left:12px}
.qr-art .f2{top:12px;right:12px}
.qr-art .f3{bottom:12px;left:12px}
.qr-art .rnd{position:absolute;width:9px;height:9px;background:#1B2130;border-radius:1.5px;z-index:2}
.qr-art .r1{top:30px;left:76px}
.qr-art .r2{top:66px;right:40px}
.qr-art .r3{top:98px;left:42px}
.qr-art .r4{top:122px;right:72px}
.qr-art .r5{bottom:46px;left:88px}
.qr-art .r6{bottom:26px;right:38px}
.qr-art .r7{top:80px;left:122px}
.qr-art .r8{top:54px;left:32px}
.qr-logo{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:32px;height:32px;background:#fff;border-radius:9px;z-index:3;display:flex;align-items:center;justify-content:center;box-shadow:0 0 0 3px #fff}
.qr-logo::after{content:"";width:16px;height:16px;border-radius:5px;background:linear-gradient(135deg,#FF8A3D,var(--orange))}
.qr-art img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:4}
.qr-note{font-size:12px;color:#8A5A2B;background:#FFF8EE;border:1px dashed #E8B98A;border-radius:8px;padding:6px 10px;display:inline-block}
.qr-sub{font-size:13px;color:var(--ink-2);margin-top:14px}

/* ============ toast ============ */
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--dark);color:#fff;font-size:13px;padding:10px 20px;border-radius:10px;opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;z-index:99;box-shadow:0 8px 24px rgba(0,0,0,.25);max-width:80vw}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-col-brand{grid-column:1/-1;border-bottom:1px solid var(--line);padding-bottom:16px}
}
@media (max-width:880px){
  .grid-3,.grid-2,.about-grid,.contact-grid{grid-template-columns:1fr}
  .hero{padding:44px 16px 40px}
  .hero h1{font-size:26px}
  .hero .cta .btn{flex:1;justify-content:center}
  .site-header{flex-wrap:wrap;height:auto;padding:10px 16px;row-gap:4px}
  .site-nav{order:3;width:100%;margin-left:0}
  .header-cta{display:none}
  .site-main{padding:26px 16px}
  .page-title{font-size:22px}
  .sec-head h2{font-size:18px}
  .proj-card .thumb{height:96px}
  .cta-band{flex-direction:column;align-items:flex-start}
  .footer-inner{grid-template-columns:1fr;gap:18px}
  .beian-bar{padding:12px 16px}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
}