/* ============================================================
   汇立芯官网 v4 —— 借鉴 raysoar.com / scc.com.cn 骨架
   视觉：白底大留白 + 发丝线 + 细字重大标题（深南式克制）
         全屏轮播 + 四标签公司介绍（睿索式结构）
   ============================================================ */
:root{
  --ink:#10151A; --ink2:#39434D; --muted:#8A94A0;
  --line:#E7EAEE; --bg:#FFFFFF; --soft:#F5F6F8;
  --blue:#1E9FE0; --blue-deep:#0E6FA8; --orange:#F08300;
  --dark:#0A121C; --dark2:#0E1B2A;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --en:"Helvetica Neue",Helvetica,Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--bg);font-size:15px;line-height:1.8;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s}
ul{list-style:none}
.wrap{max-width:1280px;margin:0 auto;padding:0 32px}
.en{font-family:var(--en);letter-spacing:.28em;text-transform:uppercase}

/* ---------- 滚动渐显 ---------- */
.rv{opacity:0;transform:translateY(28px);transition:opacity .8s cubic-bezier(.2,.6,.2,1),transform .8s cubic-bezier(.2,.6,.2,1)}
.rv.in{opacity:1;transform:none}

/* ================= 头部 ================= */
.header{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .35s,box-shadow .35s}
.header .bar{display:flex;align-items:center;height:76px;gap:40px}
.logo img{height:42px;width:auto}
.header.dark-mode .logo .logo-dark{display:none}
.header:not(.dark-mode) .logo .logo-light{display:none}
.nav{display:flex;gap:6px;margin-left:auto}
.nav>li{position:relative}
.nav>li>a{display:flex;align-items:center;gap:5px;padding:28px 18px;font-size:15px;color:#fff;letter-spacing:.02em}
.header:not(.dark-mode) .nav>li>a{color:var(--ink)}
.header.dark-mode{background:transparent}
.header.solid{background:rgba(255,255,255,.96);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line)}
.header.solid .nav>li>a{color:var(--ink)}
.nav>li>a .ar{font-size:9px;opacity:.55;transition:transform .25s}
.nav>li:hover .ar{transform:rotate(180deg)}
.nav>li>a::after{content:"";position:absolute;left:18px;right:18px;bottom:18px;height:2px;background:var(--blue);transform:scaleX(0);transition:transform .25s;transform-origin:left}
.nav>li:hover>a::after{transform:scaleX(1)}
.dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);min-width:200px;background:#fff;
  box-shadow:0 20px 50px rgba(10,20,35,.14);border-top:2px solid var(--blue);padding:10px 0;opacity:0;visibility:hidden;transition:.28s}
.nav>li:hover .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown a{display:block;padding:11px 24px;font-size:14px;color:var(--ink2)}
.dropdown a:hover{background:var(--soft);color:var(--blue);padding-left:29px}
.btn-quote{margin-left:8px;padding:11px 26px !important;background:var(--orange);color:#fff !important;font-weight:600;letter-spacing:.06em}
.btn-quote:hover{filter:brightness(1.08)}
.btn-quote::after{display:none}
.burger{display:none}

/* 移动端菜单 */
.m-nav{position:fixed;inset:0;z-index:200;background:#fff;overflow:auto;padding:90px 28px 40px;display:none}
.m-nav.open{display:block}
.m-nav .grp{border-bottom:1px solid var(--line)}
.m-nav .grp>a{display:block;padding:16px 0;font-size:17px;font-weight:600}
.m-nav .sub a{display:block;padding:8px 0 8px 14px;color:var(--muted);font-size:14px}
.m-close{position:absolute;top:24px;right:24px;font-size:26px}

/* ================= 全屏轮播（睿索式） ================= */
.hero{position:relative;height:100vh;min-height:640px;overflow:hidden;background:var(--dark)}
.slide{position:absolute;inset:0;opacity:0;transition:opacity 1s ease;pointer-events:none}
.slide.on{opacity:1;pointer-events:auto}
.slide .bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.06);transition:transform 7s linear}
.slide.on .bg{transform:scale(1)}
.slide .veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(7,15,25,.78) 8%,rgba(7,15,25,.35) 55%,rgba(7,15,25,.15))}
.slide .cap{position:absolute;left:0;right:0;bottom:0;top:0;display:flex;flex-direction:column;justify-content:center;color:#fff}
.slide .cap .kicker{font-size:12px;letter-spacing:.4em;color:rgba(255,255,255,.6);margin-bottom:26px}
.slide .cap h1{font-size:56px;font-weight:300;letter-spacing:.08em;line-height:1.25;margin-bottom:22px;max-width:840px}
.slide .cap h1 b{font-weight:600;color:var(--blue)}
.slide .cap .sub{font-size:16px;color:rgba(255,255,255,.72);letter-spacing:.12em;margin-bottom:44px}
.slide .cap .acts{display:flex;gap:14px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 38px;font-size:14px;letter-spacing:.14em;border:1px solid rgba(255,255,255,.55);color:#fff;transition:.25s}
.btn:hover{background:#fff;color:var(--ink)}
.btn.fill{background:var(--orange);border-color:var(--orange);font-weight:600}
.btn.fill:hover{background:#fff;border-color:#fff;color:var(--ink)}
.hero-ui .dots{position:absolute;right:44px;bottom:56px;display:flex;flex-direction:column;gap:14px;z-index:5}
.hero-ui .dots i{width:3px;height:34px;background:rgba(255,255,255,.35);cursor:pointer;transition:.3s}
.hero-ui .dots i.on{background:var(--blue);height:48px}
.hero-ui .rail{position:absolute;left:32px;bottom:56px;color:rgba(255,255,255,.55);font-size:12px;letter-spacing:.3em;z-index:5;display:flex;align-items:center;gap:16px}
.hero-ui .rail .l{width:56px;height:1px;background:rgba(255,255,255,.3)}

/* ================= 数字带（叠压轮播底部） ================= */
.stats{position:relative;z-index:10;margin-top:-96px}
.stats .grid{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;box-shadow:0 30px 70px rgba(10,22,40,.12)}
.stats .cell{padding:44px 20px;text-align:center;border-right:1px solid var(--line)}
.stats .cell:last-child{border-right:none}
.stats b{display:block;font-size:44px;font-weight:300;color:var(--ink);letter-spacing:.02em}
.stats b i{font-style:normal;color:var(--blue);font-size:20px;margin-left:4px}
.stats span{font-size:13px;color:var(--muted);letter-spacing:.18em}

/* ================= 通用段落 ================= */
.sec{padding:120px 0}
.sec.soft{background:var(--soft)}
.sec-head{margin-bottom:64px}
.sec-head .no{font-family:var(--en);font-size:12px;letter-spacing:.34em;color:var(--blue);margin-bottom:14px;display:flex;align-items:center;gap:18px}
.sec-head .no::after{content:"";width:44px;height:1px;background:var(--blue);opacity:.5}
.sec-head h2{font-size:38px;font-weight:300;letter-spacing:.1em}
.sec-head h2 b{font-weight:600}
.sec-head p{color:var(--muted);margin-top:12px;max-width:640px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}

/* 四标签（睿索式） */
.tabs{display:flex;border-bottom:1px solid var(--line);gap:8px;margin-bottom:44px}
.tab{padding:14px 26px;font-size:16px;color:var(--muted);cursor:pointer;position:relative;letter-spacing:.06em;transition:.2s}
.tab.on{color:var(--ink);font-weight:600}
.tab.on::after{content:"";position:absolute;left:26px;right:26px;bottom:-1px;height:2px;background:var(--blue)}
.tab-panel{display:none}
.tab-panel.on{display:grid;grid-template-columns:1.05fr 1fr;gap:64px;align-items:center}
.tab-panel h3{font-size:22px;font-weight:600;letter-spacing:.06em;margin-bottom:20px}
.tab-panel p{color:var(--ink2);margin-bottom:14px}
.tab-panel .img{overflow:hidden}
.tab-panel .img img{transition:transform .8s}
.tab-panel .img:hover img{transform:scale(1.04)}
.kv{margin-top:8px}
.kv li{display:flex;gap:14px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--ink2)}
.kv li b{color:var(--ink);min-width:88px;font-weight:600}

/* 产品卡 */
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.cards-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.pcard{background:#fff;position:relative;overflow:hidden;border:1px solid var(--line)}
.pcard .ph{height:250px;overflow:hidden;position:relative}
.pcard .ph img{width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.2,.6,.2,1)}
.pcard:hover .ph img{transform:scale(1.07)}
.pcard .bd{padding:30px 30px 34px}
.pcard h3{font-size:20px;font-weight:600;letter-spacing:.05em;margin-bottom:12px}
.pcard p{font-size:14px;color:var(--muted);margin-bottom:18px}
.pcard .more{font-size:13px;color:var(--blue);letter-spacing:.14em;display:inline-flex;align-items:center;gap:8px}
.pcard .more::after{content:"→";transition:transform .25s}
.pcard:hover .more::after{transform:translateX(5px)}
.pcard .tag{position:absolute;top:18px;left:18px;background:rgba(10,18,28,.72);color:#fff;font-size:11px;letter-spacing:.22em;padding:6px 12px;backdrop-filter:blur(4px)}

/* 解决方案（深南式 · 深色编号版块） */
.sec.dark{background:var(--dark);color:#fff}
.sec.dark .sec-head .no{color:var(--blue)}
.sec.dark .sec-head h2{color:#fff}
.sec.dark .sec-head p{color:rgba(255,255,255,.55)}
.sol{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:rgba(255,255,255,.1)}
.sol .item{background:var(--dark);padding:44px 40px;transition:background .3s;position:relative}
.sol .item:hover{background:var(--dark2)}
.sol .n{font-family:var(--en);font-size:14px;color:var(--blue);letter-spacing:.3em;margin-bottom:16px}
.sol h3{font-size:21px;font-weight:500;letter-spacing:.06em;margin-bottom:12px}
.sol p{font-size:14px;color:rgba(255,255,255,.58);margin-bottom:16px}
.sol .kw{display:flex;flex-wrap:wrap;gap:8px}
.sol .kw span{font-size:12px;color:rgba(255,255,255,.7);border:1px solid rgba(255,255,255,.18);padding:4px 12px}

/* 流程 */
.flow{display:grid;grid-template-columns:repeat(6,1fr);gap:0;border:1px solid var(--line)}
.flow .st{padding:34px 22px;border-right:1px solid var(--line);position:relative;background:#fff;transition:.3s}
.flow .st:last-child{border-right:none}
.flow .st:hover{background:var(--soft)}
.flow .st .n{font-family:var(--en);font-size:13px;color:var(--blue);letter-spacing:.2em;margin-bottom:14px}
.flow .st h4{font-size:16px;font-weight:600;margin-bottom:8px;letter-spacing:.04em}
.flow .st p{font-size:12.5px;color:var(--muted);line-height:1.7}

/* 参数条 */
.strip{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.strip>div{background:#fff;padding:36px 16px;text-align:center}
.strip b{display:block;font-size:30px;font-weight:300;color:var(--ink)}
.strip b i{font-style:normal;font-size:15px;color:var(--blue)}
.strip span{font-size:12.5px;color:var(--muted);letter-spacing:.1em}

/* 行业应用（细线网格） */
.inds{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.inds .it{padding:44px 36px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:.3s;background:#fff}
.inds .it:hover{background:var(--soft)}
.inds .it .n{font-family:var(--en);font-size:12px;color:var(--muted);letter-spacing:.3em;margin-bottom:14px}
.inds .it h3{font-size:19px;font-weight:600;letter-spacing:.06em;margin-bottom:10px}
.inds .it p{font-size:13.5px;color:var(--muted)}

/* 资讯 */
.news{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.nitem{border:1px solid var(--line);transition:.3s;background:#fff}
.nitem:hover{box-shadow:0 20px 44px rgba(10,22,40,.09);transform:translateY(-4px)}
.nitem .ph{height:190px;overflow:hidden}
.nitem .ph img{width:100%;height:100%;object-fit:cover;transition:transform .8s}
.nitem:hover .ph img{transform:scale(1.06)}
.nitem .bd{padding:24px 26px 30px}
.nitem .dt{font-family:var(--en);font-size:12px;color:var(--blue);letter-spacing:.2em;margin-bottom:10px}
.nitem h3{font-size:16.5px;font-weight:600;line-height:1.6;margin-bottom:10px}
.nitem p{font-size:13px;color:var(--muted)}

/* 合作伙伴 */
.ptners{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.ptners div{background:#fff;display:flex;align-items:center;justify-content:center;min-height:86px;font-size:14px;color:var(--ink2);letter-spacing:.08em;transition:.25s;text-align:center;padding:10px}
.ptners div:hover{color:var(--blue);background:var(--soft)}

/* CTA 大图 */
.cta{position:relative;min-height:440px;display:flex;align-items:center;background-size:cover;background-position:center;color:#fff;text-align:center}
.cta::before{content:"";position:absolute;inset:0;background:rgba(8,15,24,.62)}
.cta .in{position:relative;z-index:2;width:100%}
.cta h2{font-size:38px;font-weight:300;letter-spacing:.14em;margin-bottom:14px}
.cta p{color:rgba(255,255,255,.65);letter-spacing:.16em;margin-bottom:36px}

/* ================= 内页 ================= */
.page-banner{position:relative;height:400px;background-size:cover;background-position:center;display:flex;align-items:center;color:#fff;margin-top:0}
.page-banner .veil{position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,14,24,.8),rgba(7,14,24,.4))}
.page-banner .cap{position:relative;z-index:2;width:100%}
.page-banner .kicker{font-family:var(--en);font-size:12px;letter-spacing:.4em;color:rgba(255,255,255,.6);margin-bottom:14px}
.page-banner h1{font-size:42px;font-weight:300;letter-spacing:.12em}
.crumb{position:absolute;bottom:0;left:0;right:0;z-index:2;border-top:1px solid rgba(255,255,255,.14)}
.crumb .in{display:flex;justify-content:space-between;align-items:center;height:56px;font-size:12.5px;color:rgba(255,255,255,.6)}
.crumb a{color:rgba(255,255,255,.75)}

/* 图文页模块 */
.media{overflow:hidden}
.media img{transition:transform .8s}
.media:hover img{transform:scale(1.04)}
.txt h3{font-size:24px;font-weight:600;letter-spacing:.06em;margin-bottom:20px}
.txt p{color:var(--ink2);margin-bottom:14px}
.pill-list{display:grid;grid-template-columns:1fr 1fr;gap:12px 24px;margin-top:20px}
.pill-list li{border:1px solid var(--line);padding:12px 18px;font-size:13.5px;color:var(--ink2);display:flex;gap:10px;align-items:center}
.pill-list li::before{content:"";width:5px;height:5px;background:var(--blue);flex:none}

/* 参数表（睿索式） */
.spec{display:grid;grid-template-columns:220px 1fr;border-top:1px solid var(--line)}
.spec>div{padding:15px 22px;border-bottom:1px solid var(--line);font-size:14px}
.spec .k{background:var(--soft);color:var(--ink);font-weight:600}
.spec .v{color:var(--ink2)}
.cols2{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.cols2 .spec{border-left:1px solid var(--line)}

/* 时间轴 */
.tl{max-width:820px}
.tl .item{position:relative;padding:0 0 40px 36px;border-left:1px solid var(--line)}
.tl .item:last-child{border-left-color:transparent}
.tl .item::before{content:"";position:absolute;left:-5px;top:8px;width:9px;height:9px;border-radius:50%;background:var(--blue)}
.tl .y{font-family:var(--en);font-size:15px;color:var(--blue);letter-spacing:.16em;margin-bottom:6px}
.tl h3{font-size:18px;font-weight:600;margin-bottom:6px}
.tl p{font-size:14px;color:var(--muted)}

/* 价值观卡 */
.vgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.vcard{border-top:2px solid var(--blue);background:#fff;padding:34px 28px}
.vcard .n{font-family:var(--en);font-size:12px;color:var(--muted);letter-spacing:.3em;margin-bottom:16px}
.vcard h3{font-size:19px;font-weight:600;margin-bottom:10px}
.vcard p{font-size:13.5px;color:var(--muted)}

/* 招聘列表 */
.jobs{border-top:1px solid var(--line)}
.jobs a{display:grid;grid-template-columns:90px 1fr 200px 130px;gap:20px;align-items:center;padding:22px 12px;border-bottom:1px solid var(--line);transition:.2s}
.jobs a:hover{background:var(--soft)}
.jobs .cat{font-size:12px;color:var(--blue);letter-spacing:.1em}
.jobs h3{font-size:16.5px;font-weight:600}
.jobs .loc,.jobs .cnt{font-size:13px;color:var(--muted)}
.jobs .cnt{text-align:right}

/* 联系页 */
.contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.ccard{border:1px solid var(--line);padding:34px 28px}
.ccard .k{font-family:var(--en);font-size:11px;color:var(--blue);letter-spacing:.3em;margin-bottom:14px}
.ccard h3{font-size:17px;font-weight:600;margin-bottom:8px}
.ccard p{font-size:13.5px;color:var(--muted)}
.form{background:#fff;border:1px solid var(--line);padding:48px}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:20px}
.form label{display:block;font-size:13px;color:var(--ink2);margin-bottom:8px;letter-spacing:.04em}
.form input,.form select,.form textarea{width:100%;border:1px solid var(--line);padding:13px 16px;font-size:14px;font-family:var(--sans);outline:none;transition:border .2s;background:#fff;color:var(--ink)}
.form input:focus,.form select:focus,.form textarea:focus{border-color:var(--blue)}
.form textarea{min-height:120px;resize:vertical}
.form .full{margin-bottom:20px}

/* ================= 页脚 ================= */
.footer{background:var(--dark);color:rgba(255,255,255,.6);padding:90px 0 0}
.footer .top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:70px}
.footer h4{color:#fff;font-size:15px;font-weight:600;letter-spacing:.1em;margin-bottom:22px}
.footer li{margin-bottom:11px;font-size:13.5px}
.footer a:hover{color:var(--blue)}
.footer .brand p{font-size:13.5px;line-height:2;margin-top:18px}
.footer .brand img{height:38px}
.footer .bot{border-top:1px solid rgba(255,255,255,.08);padding:24px 0;display:flex;justify-content:space-between;font-size:12.5px;color:rgba(255,255,255,.38)}

/* 悬浮条 */
.float-bar{position:fixed;right:18px;bottom:110px;z-index:90;display:flex;flex-direction:column;gap:10px}
.float-bar a{width:56px;height:56px;background:rgba(10,18,28,.88);color:#fff;display:flex;align-items:center;justify-content:center;font-size:11.5px;line-height:1.4;text-align:center;letter-spacing:.05em;backdrop-filter:blur(4px);transition:.25s}
.float-bar a:hover{background:var(--blue)}
.float-bar a.hot{background:var(--orange)}

/* ================= 响应式 ================= */
@media (max-width:1080px){
  .nav{display:none}
  .burger{display:flex;flex-direction:column;gap:5px;margin-left:auto;padding:10px;cursor:pointer}
  .burger i{width:24px;height:2px;background:#fff;display:block}
  .header.solid .burger i{background:var(--ink)}
  .slide .cap h1{font-size:36px}
  .stats .grid{grid-template-columns:repeat(2,1fr)}
  .stats .cell{border-bottom:1px solid var(--line)}
  .split,.tab-panel.on,.cols2{grid-template-columns:1fr;gap:36px}
  .cards-3,.cards-4,.news{grid-template-columns:1fr 1fr}
  .pcard .ph{height:200px}
  .sol{grid-template-columns:1fr}
  .flow{grid-template-columns:repeat(3,1fr)}
  .flow .st{border-bottom:1px solid var(--line)}
  .strip{grid-template-columns:repeat(2,1fr)}
  .inds{grid-template-columns:1fr 1fr}
  .ptners{grid-template-columns:repeat(3,1fr)}
  .vgrid,.contact-grid{grid-template-columns:1fr 1fr}
  .footer .top{grid-template-columns:1fr 1fr}
  .jobs a{grid-template-columns:1fr;gap:6px}
  .jobs .cnt{text-align:left}
  .sec{padding:80px 0}
  .float-bar{display:none}
  .wrap{padding:0 22px}
}
@media (max-width:560px){
  .slide .cap h1{font-size:27px;letter-spacing:.04em}
  .stats b{font-size:30px}
  .flow{grid-template-columns:1fr 1fr}
  .cards-4{grid-template-columns:1fr}
  .vgrid,.contact-grid,.ptners{grid-template-columns:1fr 1fr}
  .footer .top{grid-template-columns:1fr}
  .form .row{grid-template-columns:1fr}
  .page-banner h1{font-size:30px}
  .sec-head h2{font-size:27px}
}