/* 晖创科技 首页改版 v1 —— 浅色默认 / 深色可切换 */
:root[data-theme="light"]{
  --bg:#F5F6F8; --surface:#FFFFFF; --surface-2:#EFF2F6; --text:#0B1526; --muted:#5A6675;
  --line:rgba(10,20,40,.10); --accent:#0E9F7E; --accent-2:#2F6BFF; --glass:rgba(255,255,255,.86);
  --shadow:0 22px 55px -32px rgba(10,20,40,.35); --hero-text:#F4F7FA; --accent-soft:rgba(14,159,126,.10); --danger:#B42318; --accent-ink:#0A7A61;
}
:root[data-theme="dark"]{
  --bg:#070A0F; --surface:#0D1219; --surface-2:#111823; --text:#E8EDF3; --muted:rgba(232,237,243,.56);
  --line:rgba(255,255,255,.09); --accent:#38E1B0; --accent-2:#54A8FF; --glass:rgba(7,10,15,.78);
  --shadow:0 22px 60px -30px rgba(0,0,0,.65); --hero-text:#F4F7FA; --accent-soft:rgba(56,225,176,.10); --danger:#FF8A8A; --accent-ink:#38E1B0;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased;line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.eyebrow{font-size:12px;letter-spacing:.22em;color:var(--accent-ink);text-transform:uppercase}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{max-width:720px;margin-bottom:44px}
.section-head h2{font-size:clamp(28px,3.4vw,42px);line-height:1.18;margin:14px 0 0;font-weight:650;letter-spacing:-.02em}
.section-head p{color:var(--muted);margin:16px 0 0;font-size:15px}
.muted{color:var(--muted)}

/* header */
.site-header{position:fixed;inset:0 0 auto;z-index:50;background:var(--glass);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.header-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand img{height:52px;width:auto}
:root[data-theme="dark"] .brand img{filter:invert(1) brightness(1.55)}
.brand .divider{width:1px;height:22px;background:var(--line)}
.brand .tag{font-size:11px;letter-spacing:.18em;color:var(--muted)}
.nav{display:flex;align-items:center;gap:30px;font-size:14px}
.nav a{color:var(--muted);transition:color .2s}
.nav a:hover{color:var(--text)}
.header-actions{display:flex;align-items:center;gap:14px}
.phone-link{font-size:13px;color:var(--muted)}
.theme-btn{width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--text);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:border-color .2s,color .2s}
.theme-btn:hover{border-color:var(--accent);color:var(--accent)}
.theme-btn svg{width:16px;height:16px}
.nav-toggle{display:none;width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:transparent;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:0}
.nav-toggle span{display:block;width:16px;height:1.6px;border-radius:2px;background:var(--text);transition:transform .25s,opacity .25s}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){opacity:0}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}
:root[data-theme="light"] .icon-sun{display:none}
:root[data-theme="dark"] .icon-moon{display:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:12px 22px;font-size:14px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .2s,filter .2s,background .2s,color .2s;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--accent);color:#04120D}
.btn-ghost{border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-light{background:#fff;color:#0B1526}
.hero .btn-ghost{border-color:rgba(255,255,255,.28);color:#F4F7FA;background:transparent}
.hero .btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
main{display:block}

/* hero */
.hero{position:relative;min-height:92vh;display:flex;align-items:flex-end;overflow:hidden;color:var(--hero-text);padding-top:72px}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.30;filter:blur(3px) saturate(.85);transform:scale(1.04)}
.hero::before{content:"";position:absolute;inset:0;z-index:1;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:72px 72px;pointer-events:none}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,10,15,.35) 0%,rgba(7,10,15,.62) 55%,#070A0F 100%)}
.hero-content{position:relative;z-index:2;padding-top:110px;padding-bottom:84px;width:100%}
.hero-badge{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);border-radius:999px;padding:7px 14px;font-size:12px;color:rgba(244,247,250,.72);margin-bottom:26px}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block}
.hero h1{font-size:clamp(38px,5.2vw,66px);line-height:1.14;letter-spacing:-.03em;font-weight:650;margin:0;max-width:900px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p{max-width:620px;margin:22px 0 0;color:rgba(244,247,250,.62);font-size:16px;line-height:1.9}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-meta{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:56px;padding-top:28px;border-top:1px solid rgba(255,255,255,.14);max-width:760px}
.hero-meta b{display:block;font-size:14px;font-weight:600;color:rgba(244,247,250,.9)}
.hero-meta span{display:block;font-size:12px;color:rgba(244,247,250,.45);margin-top:4px}

/* capability */
.cap-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:20px;overflow:hidden}
.cap-card{background:var(--surface);padding:30px 26px;transition:background .25s}
.cap-card:hover{background:var(--surface-2)}
.cap-icon{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--accent);margin-bottom:26px}
.cap-icon svg{width:20px;height:20px}
.cap-card h3{font-size:17px;margin:0;font-weight:600}
.cap-card p{font-size:13px;line-height:1.85;color:var(--muted);margin:10px 0 0}
.cap-card .idx{font-size:11px;letter-spacing:.12em;color:var(--muted);margin-top:22px}

/* cases */
.case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.case-card{border:1px solid var(--line);border-radius:20px;overflow:hidden;background:var(--surface);box-shadow:var(--shadow);transition:transform .3s,border-color .3s}
.case-card:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}
.case-media{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--surface-2)}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.case-card:hover .case-media img{transform:scale(1.04)}
.case-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(0,0,0,.42))}
.case-body{padding:22px}
.case-body h3{font-size:17px;margin:0;line-height:1.5;font-weight:600}
.case-body p{font-size:13px;color:var(--muted);margin:8px 0 0;line-height:1.7}
.case-meta{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-top:18px;letter-spacing:.08em}

/* products */
.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.product-card{border:1px solid var(--line);border-radius:20px;background:var(--surface);padding:26px;transition:border-color .3s,background .3s}
.product-card:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}
.product-top{display:flex;justify-content:space-between;align-items:center;gap:12px}
.product-top .kicker{font-size:11px;color:var(--muted);letter-spacing:.12em}
.pill{font-size:11px;border:1px solid color-mix(in srgb,var(--accent) 30%,var(--line));color:var(--accent-ink);border-radius:999px;padding:4px 10px}
.product-card h3{font-size:19px;margin:18px 0 0;font-weight:600}
.product-card p{font-size:13px;color:var(--muted);line-height:1.8;margin:8px 0 0}
.product-media{margin-top:20px;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--surface-2);aspect-ratio:16/10}
.product-media img{width:100%;height:100%;object-fit:cover}

/* process */
.process-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:start}
.steps{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:20px;overflow:hidden}
.step{display:flex;gap:20px;background:var(--surface);padding:22px 24px}
.step .n{font-size:12px;color:var(--accent-ink);width:26px;flex:none;padding-top:2px}
.step h3{font-size:15px;margin:0;font-weight:600}
.step p{font-size:13px;color:var(--muted);margin:4px 0 0;line-height:1.7}

/* about */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-copy p{font-size:15px;line-height:1.9;color:var(--muted);margin:14px 0 0}
.about-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.about-tags span{border:1px solid var(--line);border-radius:999px;padding:7px 13px;font-size:12px;color:var(--muted)}
.about-media{border-radius:20px;overflow:hidden;border:1px solid var(--line);aspect-ratio:4/3;background:var(--surface-2)}
.about-media img{width:100%;height:100%;object-fit:cover}

/* contact */
.contact{position:relative;overflow:hidden;border-top:1px solid var(--line);background:var(--surface)}
.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:end;padding-top:84px;padding-bottom:84px}
.contact h2{font-size:clamp(30px,4vw,50px);line-height:1.16;margin:14px 0 0;letter-spacing:-.02em}
.contact p{color:var(--muted);font-size:15px;margin:16px 0 0;line-height:1.9}
.contact-list{display:grid;gap:10px}
.contact-item{display:flex;align-items:center;justify-content:space-between;gap:20px;border:1px solid var(--line);background:var(--bg);border-radius:14px;padding:15px 18px;font-size:13px}
.contact-item span{color:var(--muted)}
.contact-item b{font-weight:600}
.contact-item:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:26px 0;font-size:12px;color:var(--muted)}
.footer-inner{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}
.footer-inner a:hover{color:var(--text)}

/* floating contact */
.float-contact{position:fixed;right:22px;bottom:22px;z-index:40;background:var(--accent);color:#04120D;border-radius:999px;padding:12px 18px;font-size:13px;font-weight:600;box-shadow:0 14px 40px -16px rgba(0,0,0,.5)}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

@media(max-width:1024px){
  .cap-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .case-grid,.product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .process-grid,.about-grid,.contact-grid{grid-template-columns:1fr;gap:34px}
  .nav{display:none}
  .nav-toggle{display:inline-flex}
  body.nav-open .nav{display:flex;position:fixed;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:var(--surface);border-bottom:1px solid var(--line);padding:6px 24px 16px;box-shadow:0 24px 40px -28px rgba(10,20,40,.45);z-index:49;max-height:calc(100vh - 72px);overflow:auto}
  body.nav-open .nav a{padding:13px 0;border-bottom:1px solid var(--line);font-size:15px;color:var(--text)}
  body.nav-open .nav a:last-child{border-bottom:0}
}
@media(max-width:640px){
  .section{padding:70px 0}
  .hero{min-height:86vh}
  .hero-content{padding-top:86px;padding-bottom:58px}
  .hero h1{font-size:clamp(28px,8vw,38px);line-height:1.22}
  .hero p{font-size:14px;line-height:1.8}
  .hero-actions .btn{padding:10px 16px;font-size:13px}
  .hero-meta{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cap-grid,.case-grid,.product-grid{grid-template-columns:1fr}
  .header-inner{height:64px}
  body.nav-open .nav{top:64px;max-height:calc(100vh - 64px)}
  .brand img{height:34px;max-width:190px;object-fit:contain}
  .brand .divider,.brand .tag,.phone-link{display:none}
  .header-actions .btn-primary{display:none}
  .float-contact{right:12px;bottom:12px;padding:10px 15px;font-size:12px}
  .contact-grid{padding-top:64px;padding-bottom:64px}
}