:root{--blue:#0B5CBF;--gold:#F5A623;--ink:#1a1a1a;--muted:#6b6b6b;--line:#e8e4de;--bg:#fffbf5;--night:#0e1116;--night2:#161b23;--amber:#ffb45c;--amber2:#ffd8a8}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75}
.wrap{max-width:980px;margin:0 auto;padding:0 20px}
.hd{position:sticky;top:0;background:rgba(14,17,22,.92);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08);z-index:9}
.hd .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{text-decoration:none;color:#fff;display:flex;gap:10px;align-items:baseline}
.logo strong{color:#fff;font-size:20px}
.logo span{font-size:12px;color:rgba(255,255,255,.55)}
nav a{margin-left:16px;color:rgba(255,255,255,.78);text-decoration:none;font-size:14px}
nav a:hover{color:#fff}
nav .tel{color:#1a1206;background:var(--amber);padding:6px 12px;border-radius:999px;font-weight:600}
.hero{padding:56px 0 40px;background:linear-gradient(180deg,#fff 0%,var(--bg) 100%)}
.hero-lg h1{font-size:46px;letter-spacing:1px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;list-style:none;padding:0;margin:28px 0 0}
.stats b{display:block;font-size:30px;color:var(--blue);line-height:1.2}
.stats span{font-size:12px;color:#666}

/* 夜间首屏 */
.hero2{position:relative;background:var(--night);color:#fff;overflow:hidden;padding:0}
.hero2 .hero2-bg{position:absolute;inset:0;pointer-events:none}
.hero2 .hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 42%;opacity:.62;filter:saturate(.95)}
.hero2 .hero2-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(14,17,22,.96) 30%,rgba(14,17,22,.78) 55%,rgba(14,17,22,.30) 100%),radial-gradient(120% 80% at 70% 20%,rgba(255,180,92,.18),transparent 60%)}
.hero2-in{position:relative;z-index:2;padding:84px 0 70px}
.hero-photo{margin:16px auto 28px;max-width:768px}
.hero-photo img{display:block;width:100%;height:auto;border-radius:16px;border:1px solid rgba(255,255,255,.10);box-shadow:0 24px 60px rgba(0,0,0,.5)}
.tag2{color:var(--amber);font-weight:600;margin:0 0 14px;font-size:14px;letter-spacing:.5px}
.hero2 h1{font-size:56px;line-height:1.16;margin:0 0 18px;color:#fff;letter-spacing:2px;font-weight:800}
.hero2 h1 em{font-style:normal;color:var(--amber)}
.sub2{color:rgba(255,255,255,.72);max-width:520px;font-size:16px}
.stats2{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;list-style:none;padding:26px 0 0;margin:30px 0 0;border-top:1px solid rgba(255,255,255,.12);max-width:640px}
.stats2 b{display:block;font-size:28px;color:var(--amber);line-height:1.2;font-weight:700}
.stats2 span{font-size:12px;color:rgba(255,255,255,.6)}
.btn.amber{background:var(--amber);color:#1a1206;box-shadow:0 8px 24px rgba(255,180,92,.28)}
.btn.amber:hover{background:var(--amber2)}
.btn.line{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.35)}
.btn.line:hover{border-color:var(--amber);color:var(--amber)}
/* 区块标题图标 */
h2.sec{display:flex;align-items:center;gap:10px}
h2.sec .ico{width:30px;height:30px;flex:0 0 30px;color:var(--gold)}
.lead{color:var(--muted)}
/* 色温演示 */
.demo{display:grid;grid-template-columns:1.35fr 1fr;gap:18px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px}
.demo-stage{position:relative;height:260px;border-radius:12px;overflow:hidden;background:#0d1015;transition:background .45s ease}
.demo-stage svg{position:absolute;inset:0;width:100%;height:100%}
.demo-stage .k{position:absolute;left:14px;bottom:12px;z-index:3;color:#fff;font-size:13px;background:rgba(0,0,0,.45);padding:6px 10px;border-radius:999px;backdrop-filter:blur(4px)}
.demo-ctrl{display:flex;flex-direction:column;gap:8px}
.demo-ctrl button{display:flex;align-items:center;gap:10px;width:100%;padding:10px 12px;border:1px solid #e2ddd5;border-radius:10px;background:#fff;font-size:14px;cursor:pointer;font-family:inherit;text-align:left;transition:all .2s}
.demo-ctrl button .dot{width:18px;height:18px;border-radius:50%;flex:0 0 18px;border:1px solid rgba(0,0,0,.12)}
.demo-ctrl button[aria-pressed="true"]{border-color:var(--amber);box-shadow:0 0 0 1px var(--amber) inset;background:#fffaf2}
.demo-ctrl button:hover{border-color:var(--gold)}
.demo-note{font-size:12.5px;color:var(--muted);margin:6px 0 0;line-height:1.6}
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.gallery figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.gallery img{display:block;width:100%;height:230px;object-fit:cover}
.gallery figcaption{font-size:13px;color:var(--muted);padding:9px 12px;line-height:1.5}
@media(max-width:760px){
  .hero2-in{padding:40px 0 40px}
  .hero-photo{margin:12px auto 20px;max-width:100%}
  .hero2 h1{font-size:36px;letter-spacing:1px}
  .hero2 .hero-img{opacity:.5;object-position:center 38%}
  .hero2 .hero2-bg::after{background:linear-gradient(180deg,rgba(14,17,22,.72) 0%,rgba(14,17,22,.86) 55%,var(--night) 100%)}
  .stats2{grid-template-columns:repeat(2,1fr);gap:14px;max-width:none}
  .stats2 b{font-size:24px}
  .demo{grid-template-columns:1fr;padding:12px}
  .demo-stage{height:200px}
  h2.sec .ico{width:24px;height:24px;flex-basis:24px}
  .gallery{grid-template-columns:1fr}
  .gallery img{height:200px}
}
.tag{color:var(--gold);font-weight:600;margin:0 0 8px}
h1{font-size:34px;line-height:1.3;margin:0 0 16px}
.sub{color:#444;max-width:720px}
.btns{margin-top:22px;display:flex;gap:12px;flex-wrap:wrap}
.btn{background:var(--blue);color:#fff;padding:12px 22px;border-radius:10px;text-decoration:none;font-weight:600}
.btn.ghost{background:transparent;color:var(--blue);border:1.5px solid var(--blue)}
h2{font-size:24px;margin:44px 0 16px}
h3{font-size:17px;margin:0 0 8px}
table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
th,td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;font-size:15px;vertical-align:top}
th{width:120px;color:var(--muted);font-weight:500;background:#faf7f2}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.form{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}
.form label{display:block;font-size:13px;color:#555;margin-bottom:10px}
.form input,.form select,.form textarea{width:100%;margin-top:4px;padding:10px 12px;border:1px solid #ddd;border-radius:8px;font-size:15px;font-family:inherit;background:#fff}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.callcard{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px;text-align:center}
.callcard .big{font-size:30px;margin:0 0 8px;font-weight:700}
.callcard .big a{color:var(--blue);text-decoration:none}
.callcard .btns{justify-content:center;margin-top:16px}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;text-decoration:none;color:inherit}
.card .ci{width:34px;height:34px;color:var(--gold);margin-bottom:10px;display:block}
.card p{margin:0;color:#555;font-size:14px}
.card.link:hover{border-color:var(--blue)}
.qa details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:10px}
.qa summary{cursor:pointer;font-weight:600}
.qa p{margin:10px 0 0;color:#444}
.more{margin-top:16px}
.also{color:var(--blue);font-weight:600;margin:14px 0 0;font-size:15px}
.short{background:#f2f8ff;border-left:4px solid var(--blue);padding:12px 14px;border-radius:8px;margin:14px 0;font-size:15px;color:#123;line-height:1.7}
.pager{display:flex;justify-content:space-between;gap:14px;margin:20px 0;font-size:14px;flex-wrap:wrap}
.pager a{color:var(--blue);text-decoration:none}
.qlist{columns:2;column-gap:28px;padding-left:20px}
.qlist li{margin-bottom:10px;break-inside:avoid}
@media(max-width:720px){
  .hero-lg h1{font-size:27px}
  .stats{grid-template-columns:1fr 1fr;gap:10px}
  .stats b{font-size:26px}
  .demo{grid-template-columns:1fr}
  .demo-light{height:170px}
  .hd .wrap{height:auto;padding:8px 0;flex-wrap:wrap;gap:4px}
  .logo span{display:none}
  .logo strong{font-size:18px;white-space:nowrap}
  nav{display:flex;align-items:center;overflow-x:auto;max-width:100%;-webkit-overflow-scrolling:touch}
  nav a{margin-left:12px;font-size:13px;white-space:nowrap}
  nav a:first-child{margin-left:0}
  nav .tel{padding:4px 10px;font-size:12px}
  .wrap{padding:0 14px}
  h1{font-size:26px}
  .hero{padding:30px 0 24px}
  .card{padding:14px}
  table{font-size:13px}
  th,td{padding:8px 10px}
  .qlist{columns:1}
  .prose{padding:16px 14px}
  .prose h2{font-size:19px}
  .prose table{display:block;overflow-x:auto;white-space:nowrap}
  .btns{flex-direction:column;align-items:stretch}
  .btn{text-align:center}
}
.article h1{font-size:26px;margin-top:20px}
.crumbs{font-size:13px;color:var(--muted);margin-top:18px}
.crumbs a{color:var(--blue);text-decoration:none}
.answer{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;font-size:16px;margin:16px 0}
.storebox{background:#f4f8ff;border:1px solid #d8e6ff;border-radius:14px;padding:16px 18px;margin:22px 0}
.storebox h2.sb{font-size:17px;margin:0 0 6px;color:var(--blue)}
.storebox p{margin:4px 0}
.related h2{font-size:18px}
.ld{font-size:13px;color:var(--muted)}
.muted{color:var(--muted);font-size:13px}
.lead{color:#444}
.case{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:14px}
.case h2{margin:0 0 8px;font-size:20px}
.cta{background:var(--blue);color:#fff;padding:44px 0;margin-top:56px}
.cta h2{margin:0 0 8px}
.cta .btn{background:#fff;color:var(--blue)}
.cta .btn.ghost{background:transparent;color:#fff;border-color:#fff}
.ft{padding:28px 0 40px;color:#444;font-size:14px}
.ft .muted{font-size:12px}
.ft a{color:var(--blue);text-decoration:none}
.prose{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px 28px;margin:18px 0}
.prose h1{display:none}
.prose h2{font-size:22px;margin:30px 0 12px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:18px;margin:22px 0 10px}
.prose p{margin:12px 0;color:#333}
.prose ul{margin:12px 0;padding-left:22px}
.prose li{margin:6px 0}
.prose strong{color:#111}
.prose table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.prose th,.prose td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.prose th{background:#faf7f2;color:#555;font-weight:500}
.prose blockquote{border-left:3px solid var(--gold);margin:16px 0;padding:8px 16px;background:#fffaf0}
.prose hr{border:0;border-top:1px solid var(--line);margin:24px 0}
.prose code{background:#f4f4f4;padding:1px 5px;border-radius:4px;font-size:13px}
@media(max-width:720px){.prose{padding:18px 16px}}