/* ===== 青岛一成科技官网 · 公共样式（全部页面共用） ===== */
:root{
  --bg:#eef4fb; --bg2:#e6effa; --panel:rgba(255,255,255,.78); --panel2:rgba(47,111,237,.07);
  --line:rgba(15,48,92,.10); --line2:rgba(15,48,92,.18);
  --ink:#102a43; --soft:#46627f; --faint:#8195ad;
  --b1:#3b82f6; --b2:#2f93d8; --b3:#6d8cf5; --b4:#2563eb;
  --grad:linear-gradient(120deg,#4f8ff0,#2f93d8 55%,#7b93f0);
  --grad-soft:linear-gradient(120deg,rgba(59,130,246,.10),rgba(47,147,216,.10));
  --r:18px; --maxw:1200px;
  --font:"Alibaba PuHuiTi 3.0","Alibaba PuHuiTi 2.0","Alibaba PuHuiTi","AlibabaPuHuiTi-R",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden;position:relative}
body::before{content:"";position:fixed;inset:0;z-index:-2;background:
  radial-gradient(900px 600px at 82% -8%,rgba(79,143,240,.16),transparent 60%),
  radial-gradient(820px 560px at 4% 12%,rgba(109,140,245,.13),transparent 60%),
  radial-gradient(700px 500px at 50% 108%,rgba(47,147,216,.14),transparent 60%)}
body::after{content:"";position:fixed;inset:0;z-index:-2;opacity:.6;
  background-image:linear-gradient(rgba(15,48,92,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(15,48,92,.045) 1px,transparent 1px);
  background-size:54px 54px;mask-image:radial-gradient(circle at 50% 30%,#000,transparent 80%)}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 26px}
h1,h2,h3,h4{line-height:1.18;letter-spacing:-.01em;font-weight:800}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12.5px;letter-spacing:.26em;text-transform:uppercase;color:var(--b4);font-weight:700;margin-bottom:18px}
.eyebrow::before{content:"";width:30px;height:1px;background:linear-gradient(90deg,var(--b1),var(--b2))}
.section{padding:104px 0}
.section-head{max-width:760px;margin-bottom:54px}
.section-head h2{font-size:clamp(28px,4vw,44px);margin-bottom:16px}
.section-head p{color:var(--soft);font-size:17px}

/* nav */
header{position:sticky;top:0;z-index:60;background:rgba(243,248,253,.80);backdrop-filter:saturate(160%) blur(16px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:19px;color:var(--ink)}
.logo .mark{width:36px;height:36px;border-radius:10px;background:var(--grad);display:grid;place-items:center;color:#fff;font-size:15px;font-weight:900;box-shadow:0 8px 22px -8px rgba(79,143,240,.6)}
.logo small{display:block;font-size:10.5px;font-weight:600;color:var(--faint);letter-spacing:.16em}
.menu{display:flex;gap:32px;list-style:none;font-size:14.5px;font-weight:500}
.menu a{color:var(--soft);position:relative;padding:8px 0;transition:color .2s}
.menu a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--grad);transition:width .25s}
.menu a:hover,.menu a.active{color:var(--ink)}
.menu a:hover::after,.menu a.active::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;text-align:center;gap:9px;padding:12px 23px;border-radius:999px;font-weight:650;font-size:14.5px;cursor:pointer;border:1px solid transparent;transition:.25s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 30px -12px rgba(79,143,240,.65);font-weight:750}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 44px -12px rgba(47,147,216,.7)}
.btn-ghost{border-color:var(--line2);color:var(--ink)}
.btn-ghost:hover{border-color:var(--b2);color:var(--b4);box-shadow:0 0 0 4px var(--panel2)}
.btn-light{background:#fff;color:var(--b4);box-shadow:0 12px 30px -14px rgba(15,48,92,.5);border:1px solid rgba(255,255,255,.6)}
.btn-light:hover{transform:translateY(-2px);color:var(--b1)}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:9px}
.burger span{width:25px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}

/* hero */
.hero{position:relative;padding:118px 0 96px;overflow:hidden}
.hero .grid2{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(38px,6vw,68px);line-height:1.06;margin-bottom:22px;font-weight:850}
.hero p.lead{font-size:18.5px;color:var(--soft);max-width:560px;margin-bottom:34px}
.hero .actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-art{position:relative;height:440px;display:grid;place-items:center}
.hero-art svg{width:100%;height:100%;filter:drop-shadow(0 10px 30px rgba(79,143,240,.25))}
.spin{transform-origin:300px 300px;animation:spin 38s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.float{animation:float 7s ease-in-out infinite}
@keyframes float{50%{transform:translateY(-16px)}}
.orb{position:absolute;width:130px;height:130px;border-radius:50%;filter:blur(10px);opacity:.45;animation:float 9s ease-in-out infinite}
.orb.a{background:radial-gradient(circle,#7fb0f5,transparent 70%);top:6%;left:6%}
.orb.b{background:radial-gradient(circle,#6fd6e8,transparent 70%);bottom:8%;right:8%;animation-delay:1.5s}
.trustbar{display:flex;flex-wrap:wrap;gap:14px;margin-top:48px}
.chip{display:inline-flex;align-items:center;gap:9px;padding:9px 16px;border:1px solid var(--line);border-radius:999px;background:var(--panel);font-size:13.5px;color:var(--soft)}
.chip b{color:var(--ink)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px}
.stat{padding:24px 22px;border:1px solid var(--line);border-radius:var(--r);background:var(--panel);box-shadow:0 14px 40px -28px rgba(15,48,92,.4);position:relative;overflow:hidden}
.stat::before{content:"";position:absolute;left:0;top:0;width:3px;height:100%;background:var(--grad)}
.stat b{display:block;font-size:34px;font-weight:850;letter-spacing:-.02em;color:var(--ink);text-align:center}
.stat span{display:block;font-size:13px;color:var(--faint);text-align:center}

/* cards */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{border:1px solid var(--line);border-radius:var(--r);padding:30px;background:var(--panel);backdrop-filter:blur(6px);transition:.3s;position:relative;overflow:hidden;box-shadow:0 14px 40px -30px rgba(15,48,92,.35)}
.card::after{content:"";position:absolute;inset:0;border-radius:var(--r);padding:1px;background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:.3s}
.card:hover{transform:translateY(-6px);background:#fff;box-shadow:0 26px 60px -28px rgba(47,147,216,.45)}
.card:hover::after{opacity:.9}
.card .ic{width:54px;height:54px;border-radius:14px;background:var(--grad-soft);border:1px solid var(--line2);display:grid;place-items:center;color:var(--b1);margin-bottom:20px;font-size:24px}
.card h3{font-size:20px;margin-bottom:11px;color:var(--ink)}
.card p{color:var(--soft);font-size:14.5px}
.card .more{display:inline-flex;align-items:center;gap:7px;margin-top:16px;color:var(--b4);font-weight:650;font-size:13.5px;cursor:pointer}
.card .more svg{transition:transform .2s}.card:hover .more svg{transform:translateX(5px)}

.filters{display:flex;flex-wrap:wrap;gap:11px;margin-bottom:38px}
.filters button{font:inherit;font-size:13.5px;font-weight:600;color:var(--soft);background:var(--panel);border:1px solid var(--line);padding:10px 19px;border-radius:999px;cursor:pointer;transition:.2s}
.filters button:hover{border-color:var(--b2);color:var(--ink)}
.filters button.active{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 10px 26px -12px rgba(79,143,240,.6)}

/* products */
.product-card{cursor:pointer;display:flex;flex-direction:column}
.product-card .cover{height:170px;border-radius:14px;margin-bottom:18px;position:relative;overflow:hidden;display:grid;place-items:center;color:#fff;font-size:48px;font-weight:900}
.product-card .cover::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.18) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.18) 1px,transparent 1px);background-size:22px 22px;opacity:.45}
.product-card .cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.08),transparent 40%,transparent 60%,rgba(0,0,0,.12))}
.product-card .cover .tag{position:absolute;top:12px;left:12px;z-index:3;font-size:11px;letter-spacing:.08em;text-transform:uppercase;background:rgba(255,255,255,.92);color:var(--b4);padding:5px 10px;border-radius:999px;font-weight:750}
.product-card .cover .ico{position:relative;z-index:2;opacity:.95}
.product-card h3{font-size:21px;margin-bottom:10px;color:var(--ink)}
.product-card p{color:var(--soft);font-size:14.5px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.product-card .more{margin-top:auto;padding-top:16px}

/* cases */
.case-card{cursor:pointer;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--panel);transition:.3s;box-shadow:0 14px 40px -30px rgba(15,48,92,.3)}
.case-card:hover{transform:translateY(-6px);box-shadow:0 26px 60px -28px rgba(47,147,216,.45);border-color:var(--line2)}
.case-card .top{height:150px;display:grid;place-items:center;color:#fff;position:relative;overflow:hidden}
.case-card .top::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.18) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.18) 1px,transparent 1px);background-size:26px 26px;opacity:.5}
.case-card .top.c1{background:linear-gradient(135deg,#4f8ff0,#1e5fd0)}
.case-card .top.c2{background:linear-gradient(135deg,#7b93f0,#5b6fe0)}
.case-card .top.c3{background:linear-gradient(135deg,#2f93d8,#0e7fa8)}
.case-card .top .gi{position:relative;font-size:14px;font-weight:800;letter-spacing:.06em;text-shadow:0 2px 10px rgba(0,0,0,.25)}
.case-card .body{padding:26px}
.case-card .body .tl{font-size:13px;color:var(--b4);font-weight:700}
.case-card .body h3{font-size:21px;margin:8px 0 11px;color:var(--ink)}
.case-card .body p{color:var(--soft);font-size:14px}
#cwrap{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.case-card{display:block;text-decoration:none;color:inherit}

/* feature cards with line icon beside title */
.ititle{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.ititle svg{width:32px;height:32px;color:var(--b1);stroke-width:1.7;flex:none}
.ititle h3{margin:0!important}

/* case detail */
.case-hero{padding:90px 0 50px}
.case-hero .meta{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.case-hero .meta span{font-size:13px;background:var(--panel);border:1px solid var(--line);padding:6px 14px;border-radius:999px;color:var(--soft)}
.case-detail .section{padding:60px 0}
.case-detail h3{font-size:24px;margin-bottom:14px}
.case-detail .lead{font-size:17px;color:var(--soft);max-width:780px;line-height:1.8}
.case-detail .grid2{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.case-step{display:flex;gap:16px;margin-bottom:22px}
.case-step .num{width:34px;height:34px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800;flex:none;font-size:14px}

/* news center */
.news-tabs{display:flex;gap:11px;margin-bottom:34px;flex-wrap:wrap}
.news-tabs button{font:inherit;font-size:13.5px;font-weight:600;color:var(--soft);background:var(--panel);border:1px solid var(--line);padding:10px 19px;border-radius:999px;cursor:pointer;transition:.2s}
.news-tabs button:hover{border-color:var(--b2);color:var(--ink)}
.news-tabs button.active{background:var(--grad);border-color:transparent;color:#fff}
.news-card{display:block;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:24px;transition:.3s}
.news-card:hover{transform:translateY(-5px);box-shadow:0 20px 50px -28px rgba(47,147,216,.4);border-color:var(--line2)}
.news-card .meta{display:flex;gap:14px;margin-bottom:12px;font-size:13px;color:var(--faint)}
.news-card h3{font-size:18px;margin-bottom:8px}
.news-card p{color:var(--soft);font-size:14px;line-height:1.7}

/* timeline / about */
.timeline{position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:var(--line2)}
.tl-item{position:relative;margin-bottom:30px}
.tl-dot{position:absolute;left:-30px;top:2px;width:16px;height:16px;border-radius:50%;background:#fff;border:3px solid var(--b1)}
.tl-year{font-size:14px;color:var(--b1);font-weight:700;margin-bottom:6px}
.value-card{border:1px solid var(--line);border-radius:var(--r);padding:24px;background:var(--panel);text-align:center}
.value-card h4{font-size:18px;margin-bottom:8px}
.value-card p{font-size:14px;color:var(--soft)}

/* careers */
.job-card{border:1px solid var(--line);border-radius:var(--r);padding:22px;background:var(--panel);margin-bottom:14px;transition:.3s}
.job-card:hover{border-color:var(--line2);box-shadow:0 14px 40px -30px rgba(15,48,92,.35)}
.job-card h4{font-size:18px;margin-bottom:8px}
.job-meta{display:flex;gap:18px;font-size:13px;color:var(--faint);margin-bottom:12px}
.badge-soft{font-size:12px;font-weight:600;padding:4px 11px;border-radius:999px;background:#eaf2fe;color:var(--brand-deep)}
.metrics{display:flex;gap:22px;flex-wrap:wrap;margin-top:18px;border-top:1px solid var(--line);padding-top:18px}
.metrics .m{flex:1 1 0;min-width:80px;text-align:center}
.metrics .m b{display:block;font-size:24px;font-weight:850;letter-spacing:-.02em;color:var(--ink);text-align:center}.metrics .m span{display:block;font-size:12px;color:var(--faint);text-align:center}

/* split / prose (catia/abaqus/about) */
.split{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center}
.visual{border-radius:var(--r);background:linear-gradient(160deg,#2f6fed,#5b9bf5);aspect-ratio:5/4;display:grid;place-items:center;color:#fff;box-shadow:0 30px 70px -30px rgba(47,147,216,.55);overflow:hidden;position:relative}
.visual svg{width:82%;height:82%}
.prose{max-width:780px}.prose p{color:var(--soft);font-size:16.5px;margin-bottom:16px}
.prose h3{font-size:22px;margin:30px 0 12px;color:var(--ink)}
.feat{list-style:none;display:grid;gap:13px;margin-top:6px}
.feat li{display:flex;gap:12px;font-size:15.5px;color:var(--soft);align-items:flex-start}
.feat li svg{flex:none;margin-top:4px;color:var(--b1)}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:40px}
.contact-info{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:34px;box-shadow:0 14px 40px -30px rgba(15,48,92,.3)}
.contact-info .row{display:flex;gap:14px;align-items:flex-start;padding:16px 0;border-bottom:1px solid var(--line)}
.contact-info .row:last-child{border:none}
.contact-info .row .ic{width:42px;height:42px;border-radius:11px;background:var(--grad-soft);border:1px solid var(--line2);display:grid;place-items:center;color:var(--b1);flex:none;font-size:20px}
.contact-info .row b{display:block;font-size:13px;color:var(--faint);font-weight:600;margin-bottom:3px}
.contact-form{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:34px;box-shadow:0 14px 40px -30px rgba(15,48,92,.3)}
.contact-form .field{margin-bottom:16px}
.contact-form label{display:block;font-size:13px;font-weight:600;color:var(--soft);margin-bottom:8px}
.contact-form input,.contact-form textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);font:inherit}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--b2);box-shadow:0 0 0 3px rgba(47,147,216,.15)}

/* subhero */
.subhero{position:relative;overflow:hidden;padding:96px 0 78px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.6),transparent)}
.subhero::before{content:"";position:absolute;inset:0;background:radial-gradient(700px 420px at 86% -30%,rgba(79,143,240,.16),transparent 60%),radial-gradient(620px 420px at 0 120%,rgba(109,140,245,.14),transparent 60%)}
.subhero .wrap{position:relative}
.crumb{font-size:13px;color:var(--faint);margin-bottom:16px}
.crumb a:hover{color:var(--b4)}
.subhero h1{font-size:clamp(32px,5vw,54px);margin-bottom:16px}
.subhero p.lead{font-size:18px;color:var(--soft);max-width:640px}

/* cta + footer */
.cta-box{border-radius:26px;padding:62px;text-align:center;position:relative;overflow:hidden;background:linear-gradient(135deg,#2f6fed,#3b82f6 55%,#34c6e0);color:#fff;box-shadow:0 30px 70px -30px rgba(47,147,216,.6)}
.cta-box::after{content:"";position:absolute;right:-90px;top:-90px;width:300px;height:300px;border-radius:50%;background:rgba(255,255,255,.14)}
.cta-box h2{font-size:clamp(24px,4vw,38px);margin-bottom:14px;position:relative}
.cta-box p{color:#e8f4ff;margin-bottom:26px;font-size:16px;position:relative}
.cta-box .actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;position:relative}
footer{background:linear-gradient(180deg,#e9f1fb,#dfeaf8);border-top:1px solid var(--line);color:var(--soft);padding:64px 0 30px;margin-top:40px}
.foot{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px}
footer .logo{color:var(--ink);margin-bottom:16px}
footer p{font-size:14.5px;line-height:1.9;max-width:320px;color:var(--soft)}
.foot h4{color:var(--ink);font-size:15px;margin-bottom:18px}
.foot ul{list-style:none;display:grid;gap:11px}
.foot a{font-size:14.5px;color:var(--soft);transition:color .2s}
.foot a:hover{color:var(--b4)}
.foot .contact li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px}
.foot .contact svg{color:var(--b4);flex:none;margin-top:3px}
.foot-bottom{border-top:1px solid var(--line);margin-top:48px;padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--faint)}

/* modal */
.modal-mask{position:fixed;inset:0;z-index:200;display:none;align-items:center;justify-content:center;padding:24px;background:rgba(15,40,80,.32);backdrop-filter:blur(5px)}
.modal-mask.open{display:flex}
.modal{position:relative;background:#fff;border:1px solid var(--line2);border-radius:20px;max-width:700px;width:100%;max-height:88vh;overflow:auto;box-shadow:0 40px 90px -30px rgba(15,40,80,.4);transform:translateY(18px);opacity:0;transition:.3s}
.modal-mask.open .modal{transform:none;opacity:1}
.modal-close{position:absolute;top:14px;right:16px;width:38px;height:38px;border:none;border-radius:50%;background:rgba(15,40,80,.07);color:var(--ink);font-size:24px;line-height:1;cursor:pointer;z-index:2;transition:.2s}
.modal-close:hover{background:rgba(15,40,80,.14)}
.m-head{border-radius:20px 20px 0 0;padding:34px 36px 28px;color:#fff;background:linear-gradient(135deg,#2f6fed,#3b82f6)}
.m-head .tag{display:inline-block;font-size:12px;letter-spacing:.12em;padding:5px 12px;border-radius:999px;background:rgba(255,255,255,.22);margin-bottom:13px}
.m-head h3{font-size:27px;margin-bottom:8px;color:#fff}.m-head p{color:#e8f4ff;font-size:15px}
.m-head.c1{background:linear-gradient(135deg,#4f8ff0,#1e5fd0)}.m-head.c2{background:linear-gradient(135deg,#7b93f0,#5b6fe0)}.m-head.c3{background:linear-gradient(135deg,#2f93d8,#0e7fa8)}
.m-body{padding:30px 36px 34px}
.m-body h4{font-size:15px;color:var(--b4);margin:22px 0 11px;letter-spacing:.02em}.m-body h4:first-child{margin-top:0}
.m-body ul{list-style:none;display:grid;gap:10px}.m-body ul li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--soft)}
.m-body ul li svg{flex:none;margin-top:4px;color:var(--b1)}
.m-body p{color:var(--soft);font-size:15px;line-height:1.85}
.m-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.m-chips span{font-size:13px;padding:6px 12px;border-radius:999px;background:var(--panel2);color:var(--soft);border:1px solid var(--line)}
.m-cta{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap}

/* toast */
.toast{position:fixed;left:50%;bottom:42px;transform:translateX(-50%) translateY(20px);background:#fff;border:1px solid var(--line2);color:var(--ink);padding:14px 22px;border-radius:999px;font-size:14px;box-shadow:0 20px 50px -20px rgba(15,40,80,.4);opacity:0;pointer-events:none;transition:.3s;z-index:300}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* reveal - 默认可见，JS 额外触发动画 */
.reveal{opacity:1;transform:none;transition:opacity .6s,transform .6s}
.reveal.in{opacity:1;transform:none}

/* ===== 流畅度：页面切换淡入 + 卡片入场 + 按钮反馈 ===== */
@keyframes ycPageIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes ycCardIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
body{animation:ycPageIn .3s cubic-bezier(.22,.61,.36,1) both}
/* 产品/案例/新闻卡片：首屏与每次筛选切换都有快速依次入场（延迟由内联 animation-delay 控制） */
#pgrid>.card,#cwrap>.case-card,#news-grid>.card,#news-grid2>.news-card{animation:ycCardIn .36s cubic-bezier(.22,.61,.36,1) both}
/* 卡片/按钮交互反馈更跟手 */
.card,.btn{will-change:transform}
.btn:active{transform:scale(.97)}
/* 提交中状态 */
.btn.loading{pointer-events:none;opacity:.72;position:relative}
.btn.loading::after{content:"";width:15px;height:15px;margin-left:2px;border:2px solid currentColor;border-top-color:transparent;border-radius:50%;animation:ycSpin .6s linear infinite}
@keyframes ycSpin{to{transform:rotate(360deg)}}
/* 尊重系统“减少动态效果”设置 */
@media (prefers-reduced-motion:reduce){
  body,#pgrid>.card,#cwrap>.case-card,#news-grid>.card,#news-grid2>.news-card{animation:none}
  .btn:active{transform:none}
}
@media(max-width:980px){.grid-3,#cwrap{grid-template-columns:1fr 1fr}.split,.contact-grid{grid-template-columns:1fr;gap:34px}.foot{grid-template-columns:1fr 1fr}.stats{grid-template-columns:1fr 1fr}}
@media(max-width:720px){.menu,.nav-cta .btn-ghost{display:none}.burger{display:flex}.menu.open{display:flex;position:absolute;top:74px;left:0;right:0;flex-direction:column;background:rgba(243,248,253,.98);padding:16px 26px;gap:4px;border-bottom:1px solid var(--line);box-shadow:0 20px 40px -20px rgba(15,40,80,.3)}.menu.open a{padding:12px 0;border-bottom:1px solid var(--line)}.hero .grid2{grid-template-columns:1fr}.hero-art{height:300px}.section{padding:70px 0}.grid-2,.grid-3,#cwrap{grid-template-columns:1fr}.stats{grid-template-columns:1fr 1fr}.foot{grid-template-columns:1fr}.cta-box{padding:42px 26px}.subhero{padding:74px 0 56px}}

/* ========== 后台板块「预览效果」提示条与挂点高亮 ========== */
.yc-preview-bar{display:flex;align-items:center;flex-wrap:wrap;gap:8px 14px;padding:10px 22px;background:linear-gradient(90deg,#b45309,#d97706);color:#fff;font-size:13.5px;line-height:1.6;box-shadow:0 6px 18px -10px rgba(180,83,9,.6)}
.yc-preview-bar span{font-weight:800;white-space:nowrap;background:rgba(255,255,255,.18);padding:2px 12px;border-radius:999px}
.yc-preview-bar b{font-weight:500;opacity:.95}
.yc-preview-bar em{font-style:normal;background:rgba(0,0,0,.18);padding:2px 12px;border-radius:6px}
.yc-preview-host{outline:2px dashed #d97706;outline-offset:6px;border-radius:14px;transition:outline-color .4s;background:rgba(217,119,6,.05)}
@media(max-width:720px){.yc-preview-bar{font-size:12.5px;padding:9px 16px}}