/* ============ 御景门窗 官网样式 ============ */
:root{
  --ink:#0e141b;          /* 深墨底 */
  --ink2:#131c25;
  --ink3:#1a2531;
  --line:rgba(255,255,255,.08);
  --gold:#c8a165;         /* 香槟金 */
  --gold2:#e6c893;
  --cream:#f4efe6;        /* 米白 */
  --mut:#9aa7b3;          /* 次级文字 */
  --ok:#7fb79b;
  --serif:Georgia,"Times New Roman","Songti SC","SimSun",serif;
  --sans:"PingFang SC","Microsoft YaHei","微软雅黑",-apple-system,Helvetica,Arial,sans-serif;
  --shadow:0 24px 60px -18px rgba(0,0,0,.55);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--ink);color:var(--cream);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
::selection{background:var(--gold);color:#101418}

.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:92px 0;position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.32em;color:var(--gold);text-transform:uppercase;font-weight:600}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--gold)}
h1,h2,h3{line-height:1.25;font-weight:700}
h2.sec{font-size:clamp(26px,3.4vw,40px);letter-spacing:.06em;margin:14px 0 10px}
p.sub{color:var(--mut);max-width:640px}
.sec-head{margin-bottom:52px}
.sec-head.center{text-align:center}
.sec-head.center p.sub{margin:0 auto}
.gold{color:var(--gold)}

/* ---------- 顶栏 ---------- */
.topbar{position:fixed;inset:0 0 auto 0;z-index:99;transition:background .3s,box-shadow .3s;background:rgba(14,20,27,.55);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.topbar.scrolled{background:rgba(12,17,23,.92);box-shadow:0 6px 24px rgba(0,0,0,.35)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand .mark{width:38px;height:38px;flex:none}
.brand b{font-size:20px;letter-spacing:.22em;font-weight:700}
.brand small{display:block;font-size:10px;letter-spacing:.42em;color:var(--gold);font-weight:400}
.nav ul{display:flex;gap:34px}
.nav ul a{font-size:14.5px;color:#cdd6de;letter-spacing:.14em;position:relative;padding:6px 0}
.nav ul a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1.5px;background:var(--gold);transition:width .25s}
.nav ul a:hover,.nav ul a.on{color:#fff}
.nav ul a.on::after,.nav ul a:hover::after{width:100%}
.nav .tel{font-size:15px;color:var(--gold);letter-spacing:.06em;white-space:nowrap}
.nav .tel b{font-family:var(--serif);font-size:19px;display:block;text-align:right}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.burger span{width:24px;height:2px;background:var(--cream);transition:.25s}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{padding:170px 0 0;min-height:100vh;display:flex;flex-direction:column;background:
  radial-gradient(1100px 500px at 85% -10%,rgba(200,161,101,.14),transparent 60%),
  radial-gradient(900px 600px at -10% 110%,rgba(46,74,94,.25),transparent 55%),var(--ink)}
.hero .grid{display:grid;grid-template-columns:1.06fr .94fr;gap:64px;align-items:center;flex:1;padding-bottom:60px}
.hero h1{font-size:clamp(34px,4.6vw,58px);letter-spacing:.08em;line-height:1.22;margin:20px 0 22px}
.hero h1 em{font-style:normal;color:var(--gold);font-family:var(--serif);letter-spacing:.02em}
.hero p.lead{color:#c4cdd5;max-width:520px;font-size:16.5px}
.cta{display:flex;gap:16px;margin-top:36px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 30px;border:1px solid var(--gold);color:var(--gold);font-size:15px;letter-spacing:.18em;transition:.25s;cursor:pointer;background:none;font-family:var(--sans)}
.btn:hover{background:var(--gold);color:#131313}
.btn.solid{background:var(--gold);color:#171310;border-color:var(--gold)}
.btn.solid:hover{background:var(--gold2)}
.hero .points{margin-top:30px;display:flex;gap:22px;flex-wrap:wrap;color:var(--mut);font-size:13px;letter-spacing:.05em}
.hero .points li{display:flex;gap:8px;align-items:center}
.hero .points svg{width:15px;height:15px;flex:none;stroke:var(--gold)}
.hero .shot{position:relative}
.hero .shot .ph{position:relative;border-radius:6px;overflow:hidden;aspect-ratio:4/5;box-shadow:var(--shadow)}
.hero .shot .ph img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.04)}
.hero .shot::before{content:"";position:absolute;inset:26px -26px -26px 26px;border:1px solid rgba(200,161,101,.45);border-radius:6px;z-index:-1}
.hero .card-f{position:absolute;left:-34px;bottom:34px;background:rgba(16,22,29,.9);border:1px solid var(--line);border-left:2px solid var(--gold);padding:14px 20px;backdrop-filter:blur(8px)}
.hero .card-f b{display:block;font-size:24px;color:var(--gold);font-family:var(--serif);letter-spacing:.08em}
.hero .card-f span{font-size:12px;color:var(--mut);letter-spacing:.12em}

/* ---------- 数据条 ---------- */
.stats{border-block:1px solid var(--line);background:var(--ink2)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.stats .it{padding:34px 10px;text-align:center;border-left:1px solid var(--line)}
.stats .it:first-child{border-left:0}
.stats b{font-family:var(--serif);font-size:clamp(28px,3vw,40px);color:var(--gold);letter-spacing:.04em}
.stats b i{font-style:normal;font-size:.5em;margin-left:2px}
.stats span{display:block;margin-top:4px;color:var(--mut);font-size:13px;letter-spacing:.16em}

/* ---------- 产品 ---------- */
#products{background:linear-gradient(180deg,var(--ink) 0%,var(--ink2) 100%)}
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.prod{background:var(--ink3);border:1px solid var(--line);border-radius:8px;padding:26px 24px 24px;display:flex;flex-direction:column;gap:14px;transition:transform .3s,border-color .3s;position:relative;overflow:hidden}
.prod::after{content:"";position:absolute;inset:auto 0 0 0;height:2px;background:linear-gradient(90deg,transparent,var(--gold),transparent);opacity:0;transition:.3s}
.prod:hover{transform:translateY(-8px);border-color:rgba(200,161,101,.4)}
.prod:hover::after{opacity:1}
.prod .num{position:absolute;top:16px;right:18px;font-family:var(--serif);font-size:44px;color:rgba(255,255,255,.05)}
.prod .ico{width:100%;aspect-ratio:16/10}
.prod h3{font-size:19px;letter-spacing:.12em;margin-top:4px}
.prod p{color:var(--mut);font-size:13.5px;flex:1}
.prod .tags{display:flex;flex-wrap:wrap;gap:6px}
.prod .tags i{font-style:normal;font-size:11px;color:var(--gold2);border:1px solid rgba(200,161,101,.35);padding:2px 9px;border-radius:20px;letter-spacing:.06em}
.more{margin-top:44px;text-align:center}

/* ---------- 案例 ---------- */
.cases{background:var(--ink)}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case{position:relative;border-radius:8px;overflow:hidden;aspect-ratio:4/3;background:#0c1116;cursor:pointer}
.case img{width:100%;height:100%;object-fit:cover;filter:saturate(.85) contrast(1.05) brightness(.92);transition:transform .6s,filter .4s}
.case:hover img{transform:scale(1.06);filter:saturate(1) brightness(1)}
.case .cap{position:absolute;inset:auto 0 0 0;padding:38px 20px 16px;background:linear-gradient(180deg,transparent,rgba(8,11,15,.92))}
.case .cap b{display:block;font-size:16px;letter-spacing:.08em;margin-bottom:2px}
.case .cap span{font-size:12px;color:var(--mut);letter-spacing:.1em}
.case.wide{grid-column:span 2;aspect-ratio:auto;min-height:340px}
.case .tag{position:absolute;top:14px;left:14px;background:rgba(10,14,18,.72);border:1px solid rgba(200,161,101,.5);color:var(--gold2);font-size:11px;letter-spacing:.2em;padding:3px 12px;border-radius:20px;backdrop-filter:blur(6px)}

/* ---------- 流程 ---------- */
.steps{background:linear-gradient(180deg,var(--ink2),var(--ink))}
.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.step{padding:26px 22px 10px;border-left:1px solid var(--line);position:relative}
.step:first-child{border-left:0}
.step .dot{width:10px;height:10px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 5px rgba(200,161,101,.15);margin-bottom:18px}
.step h3{font-size:16px;letter-spacing:.14em;margin-bottom:6px}
.step h3 small{display:block;font-size:11px;color:var(--gold);letter-spacing:.3em;margin-bottom:4px;font-weight:400}
.step p{color:var(--mut);font-size:13px}

/* ---------- 关于 ---------- */
#about{background:var(--ink)}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.about-grid .facts{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:34px}
.fact{background:var(--ink3);border:1px solid var(--line);border-radius:8px;padding:20px}
.fact svg{width:26px;height:26px;stroke:var(--gold)}
.fact b{display:block;font-size:17px;margin:10px 0 4px;letter-spacing:.08em}
.fact p{font-size:12.5px;color:var(--mut)}
.about-grid .pho{border-radius:8px;overflow:hidden;position:relative}
.about-grid .pho img{width:100%;aspect-ratio:4/3;object-fit:cover;filter:saturate(.85) brightness(.95)}
.about-grid .pho .exp{position:absolute;left:18px;bottom:18px;background:rgba(12,17,23,.86);border:1px solid var(--line);padding:12px 20px;display:flex;gap:14px;align-items:center;backdrop-filter:blur(6px)}
.about-grid .pho .exp b{font-family:var(--serif);font-size:38px;color:var(--gold)}
.about-grid .pho .exp span{font-size:12px;color:var(--mut);letter-spacing:.12em;line-height:1.5}

/* ---------- 联系 ---------- */
#contact{background:linear-gradient(180deg,var(--ink),#0b1016)}
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px}
.c-item{display:flex;gap:16px;padding:18px 0;border-bottom:1px dashed var(--line)}
.c-item svg{width:22px;height:22px;stroke:var(--gold);flex:none;margin-top:3px}
.c-item b{display:block;font-size:14px;letter-spacing:.14em}
.c-item span{font-size:14px;color:var(--mut)}
.c-item span.t{font-family:var(--serif);font-size:24px;color:var(--gold);letter-spacing:.08em}
.form{background:var(--ink3);border:1px solid var(--line);border-radius:10px;padding:34px}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-size:12px;letter-spacing:.2em;color:var(--mut);margin-bottom:8px}
.field input,.field select,.field textarea{width:100%;background:#0f161e;border:1px solid var(--line);color:var(--cream);padding:12px 14px;font-size:14px;font-family:var(--sans);border-radius:4px;outline:none;transition:border-color .2s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--gold)}
.field select option{background:#141d26}
.form .btn{width:100%;justify-content:center;border:0}
.msg-ok{display:none;background:rgba(127,183,155,.12);border:1px solid rgba(127,183,155,.45);color:#a8d6c0;padding:13px 16px;border-radius:6px;font-size:14px;margin-bottom:18px}
.msg-ok.show{display:block}

/* ---------- 页脚 ---------- */
footer{border-top:1px solid var(--line);background:#0a0f14;padding:40px 0 26px}
.foot{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.foot .l{display:flex;align-items:center;gap:12px}
.foot .l svg{width:30px;height:30px}
.foot .l b{letter-spacing:.2em}
.foot nav{display:flex;gap:22px;color:var(--mut);font-size:13px}
.foot nav a:hover{color:var(--gold)}
.copy{text-align:center;color:#5d6a75;font-size:12px;margin-top:22px;letter-spacing:.08em}

/* ---------- 悬浮 ---------- */
#toTop{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;background:var(--gold);color:#141414;border:0;cursor:pointer;opacity:0;pointer-events:none;transition:.3s;font-size:18px;box-shadow:0 8px 20px rgba(0,0,0,.4);z-index:50}
#toTop.show{opacity:1;pointer-events:auto}

/* ---------- 入场动画 ---------- */
.an{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.an.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media(max-width:1024px){
  .hero{padding-top:140px}
  .hero .grid{grid-template-columns:1fr;gap:44px}
  .hero .shot{max-width:520px}
  .hero .card-f{left:10px;bottom:20px}
  .prod-grid{grid-template-columns:1fr 1fr}
  .stats .wrap{grid-template-columns:1fr 1fr}
  .stats .it{border-top:1px solid var(--line)}
  .stats .it:nth-child(-n+2){border-top:0}
  .step-grid{grid-template-columns:1fr 1fr}
  .step:nth-child(3){border-left:0}
  .step{padding:20px 16px 6px;border-top:1px solid var(--line)}
  .step:nth-child(-n+2){border-top:0}
  .about-grid{grid-template-columns:1fr;gap:40px}
  .contact-grid{grid-template-columns:1fr}
}
@media(max-width:720px){
  .nav ul{position:fixed;inset:72px 0 auto 0;background:rgba(12,17,23,.98);flex-direction:column;gap:0;padding:10px 24px 20px;display:none;backdrop-filter:blur(14px)}
  .nav ul.open{display:flex}
  .nav ul a{display:block;padding:14px 0;border-bottom:1px solid var(--line)}
  .nav .tel{display:none}
  .burger{display:flex}
  .prod-grid{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
  .case.wide{grid-column:auto;aspect-ratio:4/3;min-height:0}
  .form .row{grid-template-columns:1fr}
  section{padding:68px 0}
  .stats .wrap{grid-template-columns:1fr 1fr}
  .stats .it{border-left:0}
  .step-grid{grid-template-columns:1fr}
  .step{border-left:0;border-top:1px solid var(--line)}
  .step:first-child{border-top:0}
}