/* =========================================================
   青柚科技 · 全站统一样式 style.css
   深空青黑底 + 青绿薄荷渐变 · 纯静态站全站复用
   ========================================================= */
:root{
  --bg:#08131a; --bg2:#0b1a24; --card:#0e1f2b; --card2:#0a1720;
  --line:rgba(120,220,200,.12); --text:#e6f4f0; --muted:#88a8a0;
  --accent:#2dd4a8; --accent2:#4fd67f; --cyan:#3fd8c8;
  --grad:linear-gradient(135deg,#2dd4a8 0%,#4fd67f 100%);
  --shadow:0 8px 24px rgba(45,212,168,.30);
  --radius:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei",-apple-system,"Segoe UI",sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button{font-family:inherit}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* ================= Nav ================= */
.nav{position:sticky;top:0;z-index:99;background:rgba(8,19,26,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:box-shadow .3s}
.nav.scrolled{box-shadow:0 4px 24px rgba(0,0,0,.35)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:20px;font-weight:700;letter-spacing:.5px;display:flex;align-items:center;gap:8px;color:var(--text)}
.logo img{height:28px;width:auto;display:block;flex-shrink:0;object-fit:contain}
.logo .leaf{width:22px;height:22px;border-radius:5px;background:var(--grad);display:inline-block;position:relative;flex-shrink:0}
.logo .leaf::after{content:"";position:absolute;left:5px;top:5px;width:10px;height:10px;background:rgba(8,19,26,.85);clip-path:polygon(50% 0,100% 100%,0 100%)}
.logo b{color:#2dd4a8}
.menu{display:flex;align-items:center;gap:26px;font-size:14px;color:var(--muted)}
.menu a{position:relative;padding:6px 0}
.menu a:hover,.menu a.active{color:var(--text)}
.menu a.active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;background:var(--grad)}
.nav-cta{background:var(--grad);padding:8px 18px;border-radius:8px;font-size:14px;font-weight:600;color:#06231b;margin-left:4px}
.nav-cta:hover{opacity:.92}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{width:22px;height:2px;background:var(--text);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（首页） ================= */
.hero{position:relative;padding:96px 0 72px;overflow:hidden;text-align:center}
.hero::before{content:"";position:absolute;inset:-20% -10%;background:radial-gradient(circle at 50% 0%,rgba(45,212,168,.16),transparent 55%),radial-gradient(circle at 80% 60%,rgba(79,214,127,.10),transparent 45%);pointer-events:none}
.hero .wrap{position:relative}
.tag{display:inline-block;font-size:13px;color:var(--accent);border:1px solid rgba(45,212,168,.35);border-radius:999px;padding:5px 16px;margin-bottom:24px}
.hero h1{font-size:52px;font-weight:800;line-height:1.2;letter-spacing:1px}
.hero h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p{max-width:680px;margin:20px auto 0;color:var(--muted);font-size:17px}
.hero-btns{display:flex;gap:16px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 30px;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;border:none}
.btn-primary{background:var(--grad);color:#06231b;box-shadow:var(--shadow)}
.btn-primary:hover{opacity:.92}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{border-color:rgba(45,212,168,.5);color:var(--accent)}
.stats{display:flex;justify-content:center;gap:56px;margin-top:56px;flex-wrap:wrap}
.stat{text-align:center}
.stat b{font-size:30px;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat span{display:block;font-size:13px;color:var(--muted);margin-top:4px}

/* ================= 区块通用 ================= */
.sec{padding:72px 0}
.sec.bg2{background:var(--bg2)}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head h2{font-size:32px;font-weight:700}
.sec-head p{color:var(--muted);margin-top:10px;font-size:15px}

/* 内页页头 + 面包屑 */
.page-header{position:relative;padding:64px 0 48px;overflow:hidden;text-align:center;background:var(--bg2);border-bottom:1px solid var(--line)}
.page-header::before{content:"";position:absolute;inset:-30% -10%;background:radial-gradient(circle at 50% 0%,rgba(45,212,168,.14),transparent 60%);pointer-events:none}
.page-header .wrap{position:relative}
.crumb{font-size:13px;color:var(--muted);margin-bottom:14px}
.crumb a:hover{color:var(--accent)}
.crumb .sep{margin:0 8px;opacity:.6}
.page-header h1{font-size:36px;font-weight:800}
.page-header p{color:var(--muted);margin:12px auto 0;max-width:640px;font-size:15px}

/* ================= 产品库列表页（products.html） ================= */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.pcard{background:var(--card2);border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column;transition:transform .25s,border-color .25s}
.pcard:hover{transform:translateY(-4px);border-color:rgba(45,212,168,.45)}
.pcard .pthumb{aspect-ratio:16/9;overflow:hidden;background:var(--card)}
.pcard .pthumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.pcard:hover .pthumb img{transform:scale(1.05)}
.pcard .pbody{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.pcard h3{font-size:16px}
.pcard p{font-size:13px;color:var(--muted);flex:1}
.pcard .plink{font-size:13px;color:var(--accent);font-weight:600}
.pcard:hover .plink{text-decoration:underline}

/* ================= 首页产品合集（#business） 2×4 紧凑卡片 ================= */
.home-prod .prod-group{margin-top:36px}
.home-prod .prod-group:first-child{margin-top:8px}
.home-prod .prod-group-title{font-size:17px;margin-bottom:14px;display:flex;align-items:center;gap:10px;color:var(--head,#e6fffa)}
.home-prod .prod-group-title::before{content:"";width:4px;height:16px;border-radius:2px;background:linear-gradient(180deg,#00d4a0,#4fd67f)}
/* 2 列紧凑网格（覆盖全局 3 列 .prod-grid，仅作用于首页） */
.home-prod .prod-grid{grid-template-columns:repeat(2,1fr);gap:16px}
.home-prod .pcard .pthumb{position:relative;height:150px}
.home-prod .pcard .pbody{padding:12px 14px 14px;gap:5px}
.home-prod .pcard h3{font-size:14px}
.home-prod .pcard p{font-size:12px;line-height:1.5}
.home-prod .pcard .plink{font-size:12px}
.home-prod .badge{position:absolute;top:8px;right:8px;z-index:2;font-size:11px;line-height:1;padding:4px 8px;border-radius:999px;color:#fff;font-weight:600;letter-spacing:.5px}
.home-prod .badge.b-std{background:linear-gradient(135deg,#00d4a0,#4fd67f)}
.home-prod .badge.b-cus{background:rgba(15,40,36,.85);border:1px solid rgba(45,212,168,.55);color:#5eead4}
.home-prod > .more{margin-top:30px;font-size:13px}

/* ================= 项目案例 ================= */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case{background:var(--card2);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:transform .25s,border-color .25s}
.case:hover{transform:translateY(-4px);border-color:rgba(45,212,168,.45)}
.case .thumb{height:150px;display:flex;align-items:center;justify-content:center;font-size:38px;color:rgba(255,255,255,.75);background:radial-gradient(circle at 30% 20%,rgba(45,212,168,.26),transparent 60%),radial-gradient(circle at 70% 80%,rgba(79,214,127,.20),transparent 55%)}
.case .body{padding:18px 20px 20px}
.case .cat{font-size:12px;color:var(--accent);margin-bottom:6px}
.case h3{font-size:16px;margin-bottom:6px}
.case p{font-size:13px;color:var(--muted)}
.more{display:block;text-align:center;margin-top:32px;color:var(--accent);font-size:14px}
.more:hover{text-decoration:underline}

/* ================= 技术分享 ================= */
.blog-list{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.post{display:flex;align-items:center;justify-content:space-between;gap:20px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 18px;transition:border-color .2s}
.post:hover{border-color:rgba(45,212,168,.4)}
.post-thumb{width:150px;height:84px;border-radius:10px;overflow:hidden;flex-shrink:0;background:var(--card2)}
.post-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.post-body{flex:1;min-width:0}
.post .t{font-size:15px;font-weight:600}
.post .d{font-size:12px;color:var(--muted);margin-top:4px}
.post .arrow{color:var(--muted);font-size:18px;flex-shrink:0}

/* ================= 分类筛选 ================= */
.filter{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:36px}
.chip{padding:7px 16px;border:1px solid var(--line);border-radius:999px;font-size:13px;color:var(--muted);cursor:pointer;background:transparent;transition:.2s}
.chip:hover{color:var(--text);border-color:rgba(45,212,168,.4)}
.chip.on{background:var(--grad);color:#06231b;border-color:transparent;font-weight:600}

/* ================= 详情页（案例 / 文章） ================= */
.detail{max-width:840px;margin:0 auto}
.detail-head{text-align:center;margin-bottom:8px}
.detail-head h1{font-size:32px;line-height:1.35;font-weight:800}
.detail-meta{display:flex;flex-wrap:wrap;gap:10px 18px;justify-content:center;color:var(--muted);font-size:13px;margin:18px 0 34px}
.detail-meta span{display:inline-flex;align-items:center;gap:6px}
.detail-meta .key{color:var(--accent)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:32px;margin-bottom:24px}
.card h2{font-size:20px;margin-bottom:18px;display:flex;align-items:center;gap:10px}
.card h2::before{content:"";width:4px;height:18px;border-radius:2px;background:var(--grad);flex-shrink:0}
.detail p{color:#c4d8d2;font-size:15px;margin-bottom:14px}
.detail ul,.detail ol{color:#c4d8d2;font-size:15px;margin-bottom:14px}
.detail li{padding-left:22px;position:relative;margin-bottom:8px}
.detail ul li::before{content:"";position:absolute;left:2px;top:9px;width:8px;height:8px;border-radius:50%;background:var(--grad)}
.detail ol{counter-reset:li}
.detail ol li{counter-increment:li}
.detail ol li::before{content:counter(li);position:absolute;left:0;top:2px;width:18px;height:18px;border-radius:50%;background:rgba(45,212,168,.15);color:var(--accent);font-size:12px;display:flex;align-items:center;justify-content:center}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.gallery .shot{aspect-ratio:4/3;border-radius:12px;background:radial-gradient(circle at 30% 20%,rgba(45,212,168,.18),transparent 60%),radial-gradient(circle at 70% 80%,rgba(79,214,127,.14),transparent 55%);display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px;border:1px dashed var(--line);text-align:center;padding:12px}
.related{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.related a{background:var(--card2);border:1px solid var(--line);border-radius:12px;padding:16px 18px;font-size:13px;color:var(--muted);transition:border-color .2s}
.related a:hover{border-color:rgba(45,212,168,.45)}
.related a b{display:block;color:var(--text);font-size:14px;margin-top:4px}
.prevnext{display:flex;justify-content:space-between;gap:20px;margin-top:34px}
.prevnext a{flex:1;background:var(--card2);border:1px solid var(--line);border-radius:12px;padding:16px 18px;font-size:13px;color:var(--muted);transition:border-color .2s}
.prevnext a:hover{border-color:rgba(45,212,168,.45)}
.prevnext a b{display:block;color:var(--text);font-size:14px;margin-top:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.prevnext .next{text-align:right}

/* ================= 关于我们 ================= */
.about-c{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.about-c h3{font-size:24px;margin-bottom:14px}
.about-c p{color:var(--muted);font-size:15px}
.vals{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.val{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:border-color .2s}
.val:hover{border-color:rgba(45,212,168,.45)}
.val .ic{width:46px;height:46px;border-radius:12px;background:rgba(45,212,168,.12);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:14px}
.val h3{font-size:16px;margin-bottom:8px}
.val p{font-size:13px;color:var(--muted)}
.timeline{max-width:720px;margin:0 auto}
.tl-item{position:relative;padding:0 0 30px 30px;border-left:1px solid var(--line)}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-6px;top:5px;width:11px;height:11px;border-radius:50%;background:var(--grad)}
.tl-item .time{color:var(--accent);font-size:13px;font-weight:600}
.tl-item h3{font-size:16px;margin:4px 0}
.tl-item p{font-size:13px;color:var(--muted)}
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.flow .step{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;text-align:center}
.flow .step .no{width:30px;height:30px;margin:0 auto 10px;border-radius:50%;background:var(--grad);color:#06231b;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:14px}
.flow .step h3{font-size:14px;margin-bottom:6px}
.flow .step p{font-size:12px;color:var(--muted)}

/* ================= CTA 引导条 ================= */
.cta{margin-bottom:60px}
.cta-box{background:var(--grad);border-radius:20px;padding:44px 40px;text-align:center;color:#06231b}
.cta-box h2{font-size:26px;margin-bottom:10px}
.cta-box p{font-size:15px;opacity:.88;margin-bottom:24px}
.cta-box .btn{background:#06231b;color:#fff;box-shadow:none}
.cta-box .btn:hover{opacity:.9}

/* ================= 联系区：微信二维码 + 留言板 ================= */
.contact-wrap{display:grid;grid-template-columns:340px 1fr;gap:24px}
.qr-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;text-align:center}
.qr-box .qr{width:200px;height:200px;margin:0 auto 16px;border-radius:12px;background:#fff;display:flex;align-items:center;justify-content:center;color:#94a3b8;font-size:13px;text-align:center;padding:10px}
.qr-box h3{font-size:17px;margin-bottom:6px}
.qr-box p{font-size:13px;color:var(--muted);margin-bottom:14px}
.qr-box .wechat-id{font-size:14px;color:var(--accent);border:1px dashed rgba(45,212,168,.4);border-radius:8px;padding:8px}
.msg-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.msg-box h3{font-size:17px;margin-bottom:4px}
.msg-box .sub{font-size:13px;color:var(--muted);margin-bottom:20px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}
.form-row .full{grid-column:1/-1}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.field label em{color:var(--accent);font-style:normal}
.field input,.field select,.field textarea{width:100%;background:var(--card2);border:1px solid var(--line);border-radius:8px;padding:10px 12px;color:var(--text);font-size:14px;font-family:inherit;outline:none;transition:border-color .2s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--accent)}
.field textarea{resize:vertical;min-height:96px}
.submit{width:100%;margin-top:6px;background:var(--grad);color:#06231b;border:none;border-radius:8px;padding:12px;font-size:15px;font-weight:600;cursor:pointer}
.submit:hover{opacity:.92}
.submit:disabled{opacity:.6;cursor:not-allowed}
.form-note{margin-top:12px;font-size:13px;border-radius:8px;padding:10px 12px;display:none}
.form-note.ok{display:block;color:#06231b;background:var(--grad)}
.form-note.err{display:block;color:#ffb4a6;background:rgba(255,120,90,.12);border:1px solid rgba(255,120,90,.3)}
.form-note.info{display:block;color:var(--muted);background:var(--card2);border:1px solid var(--line)}
.contact-rows{margin-top:20px;border-top:1px solid var(--line);padding-top:16px;text-align:left}
.contact-rows .row{display:flex;justify-content:space-between;padding:8px 0;font-size:14px}
.contact-rows .row span{color:var(--muted)}

/* ================= 页脚 ================= */
.footer{border-top:1px solid var(--line);padding:40px 0 28px;color:var(--muted);font-size:13px;background:var(--bg2)}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;margin-bottom:28px}
.f-brand .logo{margin-bottom:12px;font-size:19px}
.f-brand p{font-size:13px;color:var(--muted)}
.f-links{display:flex;flex-direction:column;gap:10px}
.f-links .f-title,.f-contact .f-title{color:var(--text);font-size:14px;font-weight:600;margin-bottom:4px}
.f-links a:hover{color:var(--accent)}
.f-contact{display:flex;flex-direction:column;gap:10px}
.f-copy{border-top:1px solid var(--line);padding-top:18px;text-align:center;font-size:12px}
.f-copy a{color:var(--accent)}

/* ================= 回到顶部 ================= */
.backtop{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:12px;background:var(--card);border:1px solid var(--line);color:var(--accent);font-size:20px;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;pointer-events:none;transition:.3s;z-index:80}
.backtop.show{opacity:1;pointer-events:auto}
.backtop:hover{background:var(--grad);color:#06231b;border-color:transparent}

/* ================= 滚动显现动画（仅 JS 启用后生效，无 JS 不影响阅读） ================= */
html.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
html.js .reveal.in{opacity:1;transform:none}

/* ================= 响应式 ================= */
@media (max-width:860px){
  .nav-toggle{display:flex}
  .menu{position:fixed;left:0;right:0;top:64px;flex-direction:column;align-items:stretch;gap:0;background:rgba(8,19,26,.97);border-bottom:1px solid var(--line);padding:12px 24px 20px;transform:translateY(-120%);transition:transform .3s;visibility:hidden}
  .menu.open{transform:none;visibility:visible}
  .menu a{padding:13px 4px;border-bottom:1px solid var(--line)}
  .menu a.active::after{display:none}
  .menu a.active{color:var(--accent)}
  .nav-cta{margin:14px 0 0;text-align:center}
  .case-grid,.about-c,.related,.prod-grid,.home-prod .prod-grid{grid-template-columns:1fr}
  .home-prod .badge{font-size:11px;padding:4px 8px}
  .contact-wrap{grid-template-columns:1fr}
  .hero h1{font-size:34px}
  .stats{gap:30px}
  .form-row{grid-template-columns:1fr}
  .vals{grid-template-columns:1fr 1fr}
  .flow{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr;gap:24px}
  .page-header h1{font-size:28px}
  .detail-head h1{font-size:24px}
  .gallery{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){
  .vals,.flow,.gallery{grid-template-columns:1fr}
}