/*
 Theme Name: SDMY AI
 Theme URI: https://sdmy.site
 Description: 三谛魅影 SDMY 暗色科技风企业主题 — AI短视频 / AI短剧 / 企业宣传片
 Version: 1.0
 Author: 三谛魅影
*/

:root{
  --bg:#070b16;
  --bg2:#0c1322;
  --panel:#101a2e;
  --panel2:#152138;
  --line:rgba(255,255,255,.08);
  --txt:#e8edf6;
  --muted:#94a3b8;
  --brand:#7c3aed;
  --brand2:#22d3ee;
  --grad:linear-gradient(120deg,#7c3aed 0%,#6366f1 40%,#22d3ee 100%);
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:var(--bg);color:var(--txt);line-height:1.7;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1180px,92vw);margin:0 auto}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:999px;font-weight:600;font-size:15px;transition:.25s;cursor:pointer;border:1px solid transparent}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 30px rgba(99,102,241,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 38px rgba(99,102,241,.5)}
.btn-ghost{border-color:var(--line);color:var(--txt)}
.btn-ghost:hover{border-color:var(--brand2);color:var(--brand2)}

/* HEADER */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(7,11,22,.72);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{font-weight:800;font-size:20px;letter-spacing:.5px;display:flex;align-items:center;gap:10px}
.logo .dot{width:10px;height:10px;border-radius:50%;background:var(--grad);box-shadow:0 0 14px var(--brand2)}
.nav-links{display:flex;gap:30px;align-items:center}
.nav-links a{color:var(--muted);font-size:15px;font-weight:500;transition:.2s}
.nav-links a:hover{color:var(--txt)}
.menu-toggle{display:none;background:none;border:0;color:var(--txt);font-size:26px;cursor:pointer}

/* HERO */
.hero{position:relative;padding:120px 0 90px;text-align:center;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(800px 400px at 50% -10%,rgba(124,58,237,.35),transparent 60%),
  radial-gradient(600px 300px at 80% 20%,rgba(34,211,238,.18),transparent 60%);
  pointer-events:none}
.hero::after{content:"";position:absolute;inset:0;background-image:
  linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(circle at 50% 30%,#000,transparent 70%);opacity:.5;pointer-events:none}
.hero .inner{position:relative;z-index:1}
.badge{display:inline-block;padding:7px 16px;border:1px solid var(--line);border-radius:999px;color:var(--brand2);font-size:13px;letter-spacing:1px;margin-bottom:26px;background:rgba(34,211,238,.06)}
.hero h1{font-size:clamp(34px,6vw,62px);line-height:1.15;font-weight:800;letter-spacing:-1px}
.hero p.lead{color:var(--muted);font-size:clamp(16px,2.2vw,20px);max-width:680px;margin:22px auto 36px}
.hero .cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.stats{display:flex;gap:46px;justify-content:center;flex-wrap:wrap;margin-top:64px;position:relative;z-index:1}
.stat .num{font-size:38px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .lbl{color:var(--muted);font-size:14px;margin-top:4px}

/* SECTIONS */
section{padding:84px 0}
.sec-head{text-align:center;max-width:680px;margin:0 auto 50px}
.sec-head .kicker{color:var(--brand2);font-size:14px;letter-spacing:2px;font-weight:600}
.sec-head h2{font-size:clamp(28px,4vw,40px);font-weight:800;margin:12px 0 10px}
.sec-head p{color:var(--muted)}

/* SERVICES */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{background:linear-gradient(180deg,var(--panel),var(--bg2));border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:.3s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-6px);border-color:rgba(124,58,237,.5);box-shadow:0 18px 40px rgba(0,0,0,.4)}
.card .ico{width:50px;height:50px;border-radius:13px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:18px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px}

/* PROCESS */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;counter-reset:step}
.step{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px 20px;position:relative}
.step .n{counter-increment:step;font-size:30px;font-weight:800;color:transparent;background:var(--grad);-webkit-background-clip:text;background-clip:text}
.step .n::before{content:"0" counter(step)}
.step h4{margin:10px 0 8px;font-size:17px}
.step p{color:var(--muted);font-size:13.5px}

/* CASES */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case{height:230px;border-radius:var(--radius);border:1px solid var(--line);position:relative;overflow:hidden;display:flex;align-items:flex-end;padding:20px;background:linear-gradient(135deg,#1b2540,#0e1626)}
.case .tag{position:absolute;top:16px;left:16px;background:rgba(7,11,22,.6);border:1px solid var(--line);padding:5px 12px;border-radius:999px;font-size:12px;color:var(--brand2)}
.case h4{font-size:17px;z-index:1}
.case::after{content:"";position:absolute;inset:0;background:radial-gradient(300px 160px at 80% 0,rgba(124,58,237,.4),transparent 60%)}

/* ABOUT */
.about-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:46px;align-items:center}
.about-grid p{color:var(--muted);margin-bottom:18px}
.facts{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.fact{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px}
.fact .t{color:var(--brand2);font-size:13px}
.fact .v{font-weight:700;margin-top:6px}

/* CONTACT */
.contact-box{background:linear-gradient(135deg,var(--panel2),var(--bg2));border:1px solid var(--line);border-radius:24px;padding:48px;display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center}
.contact-box h2{font-size:30px;margin-bottom:14px}
.contact-box p{color:var(--muted);margin-bottom:22px}
.info-row{display:flex;gap:12px;align-items:center;margin-bottom:14px;color:var(--txt)}
.info-row .k{color:var(--brand2);min-width:64px;font-weight:600}
.qr{background:#fff;border-radius:16px;padding:14px;width:170px;text-align:center;color:#0b1020;font-size:13px}
.qr .box{width:142px;height:142px;background:repeating-conic-gradient(#0b1020 0 25%,#fff 0 50%) 50%/16px 16px;display:flex;align-items:center;justify-content:center;border-radius:8px;margin-bottom:8px}
.qr .box span{background:#fff;padding:4px 8px;border-radius:6px;font-size:12px}

/* FOOTER */
.site-footer{border-top:1px solid var(--line);padding:54px 0 30px;background:var(--bg2)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;margin-bottom:34px}
.site-footer h5{font-size:15px;margin-bottom:16px;color:var(--txt)}
.site-footer a{color:var(--muted);font-size:14px;display:block;margin-bottom:10px;transition:.2s}
.site-footer a:hover{color:var(--brand2)}
.site-footer .desc{color:var(--muted);font-size:14px;margin-top:14px;max-width:320px}
.copy{border-top:1px solid var(--line);padding-top:20px;color:var(--muted);font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* PAGE */
.page-main{padding:120px 0 80px;min-height:60vh}
.page-title{font-size:clamp(28px,5vw,44px);font-weight:800;margin-bottom:24px}
.page-content{color:var(--muted);font-size:16px;max-width:820px}
.page-content h2,.page-content h3{color:var(--txt);margin:28px 0 12px}
.page-content ul{margin:0 0 18px 22px}
.page-content li{margin-bottom:8px}

@media(max-width:900px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:1fr}
  .about-grid,.contact-box,.foot-grid{grid-template-columns:1fr}
  .nav-links{position:fixed;inset:68px 0 auto 0;background:var(--bg2);flex-direction:column;padding:20px;gap:18px;border-bottom:1px solid var(--line);display:none}
  .nav-links.open{display:flex}
  .menu-toggle{display:block}
}