:root{--ink:#1a2333;--muted:#5b6b82;--line:#e6ebf2;--brand:#1f6feb;--bg:#f7f9fc}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#fff}
header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:10}
.wrap{max-width:1060px;margin:0 auto;padding:0 24px}
nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:700;font-size:17px;letter-spacing:.3px}
.brand img{height:38px;width:auto;display:block}
.menu a{margin-left:20px;color:var(--muted);text-decoration:none;font-size:14.5px}
.menu a:hover{color:var(--brand)}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(135deg,#0b1526 0%,#12233f 55%,#1d3a63 100%);padding:84px 0;color:#fff}
.hero-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:52px;align-items:center}
.eyebrow{color:#9fb4d8;font-size:13px;letter-spacing:1px;margin:0 0 16px}
.hero h1{font-size:42px;line-height:1.22;margin:0 0 18px;font-weight:700}
.hero .sub{color:#c9d6ec;font-size:17px;max-width:540px;margin:0}
.cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 26px;border-radius:8px;text-decoration:none;font-weight:600;font-size:15px;transition:all .2s}
.btn-primary{background:#2f7cf6;color:#fff}
.btn-primary:hover{background:#2a6fd8}
.btn-ghost{color:#fff;border:1px solid rgba(255,255,255,.35)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.06)}
.spotlight{position:relative}
.carousel{position:relative;border-radius:14px;overflow:hidden;box-shadow:0 24px 60px rgba(0,0,0,.35);aspect-ratio:2.44;background:#0b1526}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .6s}
.slide.active{opacity:1}
.slide img{width:100%;height:100%;object-fit:cover;display:block}
.car-prev,.car-next{position:absolute;top:50%;transform:translateY(-50%);width:40px;height:40px;border:none;border-radius:50%;background:rgba(0,0,0,.45);color:#fff;font-size:22px;line-height:1;cursor:pointer;z-index:3;transition:background .2s}
.car-prev{left:12px}
.car-next{right:12px}
.car-prev:hover,.car-next:hover{background:rgba(0,0,0,.75)}
.car-dots{position:absolute;bottom:12px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:3}
.car-dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.45);cursor:pointer;transition:background .2s}
.car-dot.active{background:#fff}
.chips{position:absolute;top:14px;left:14px;display:flex;gap:8px;flex-wrap:wrap;z-index:3}
.chips span{background:rgba(0,0,0,.55);color:#fff;font-size:12px;padding:4px 12px;border-radius:999px}

/* ---------- 区块通用 ---------- */
.section{padding:72px 0}
.section-alt{background:var(--bg)}
h2{font-size:26px;margin:0 0 10px}
.section-sub{color:var(--muted);margin:0 0 32px;font-size:15px}
.grid{display:grid;gap:22px}
.grid.products{grid-template-columns:repeat(auto-fill,minmax(255px,1fr))}

/* ---------- 卖点条 ---------- */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:18px;margin:0 0 34px}
.feature{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px}
.fi{width:44px;height:44px;border-radius:10px;background:#eaf1ff;color:#1f6feb;display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:12px}
.feature b{display:block;margin-bottom:6px;font-size:15px}
.feature span{color:var(--muted);font-size:13.5px;line-height:1.6;display:block}

/* ---------- 产品卡片 ---------- */
.product-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:box-shadow .2s,transform .2s}
.product-card:hover{box-shadow:0 14px 32px rgba(20,40,80,.12);transform:translateY(-2px)}
.thumb{aspect-ratio:1/1;background:#fff;padding:12px}
.thumb img{width:100%;height:100%;object-fit:contain;display:block}
.card-body{padding:18px 20px 20px}
.tag{display:inline-block;font-size:12px;color:#1f6feb;background:#eaf1ff;border-radius:999px;padding:2px 10px;margin-bottom:9px}
.product-card h3{margin:0 0 8px;font-size:17px}
.product-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.65}
.specs{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}
.specs span{font-size:12px;color:#4b5c77;background:#f2f5fa;border-radius:6px;padding:2px 9px}

/* ---------- 使用场景 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px}
.scene{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px}
.scene .em{font-size:26px;display:block;margin-bottom:10px}
.scene h3{margin:0 0 8px;font-size:16px}
.scene p{margin:0;color:var(--muted);font-size:13.5px;line-height:1.65}

/* ---------- 品牌视觉 ---------- */
.gallery-grid{columns:3;column-gap:18px}
.shot{display:inline-block;width:100%;border-radius:12px;overflow:hidden;border:1px solid var(--line);background:#fff;margin:0 0 18px}
.shot img{width:100%;display:block;transition:transform .25s}
.shot:hover img{transform:scale(1.03)}
.shot figcaption{padding:12px 16px;font-size:13px;color:var(--muted);border-top:1px solid var(--line)}

/* ---------- 品质认证 ---------- */
.grid.quality{grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}
.q-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px 16px;text-align:center}
.q-badge{width:56px;height:56px;border-radius:50%;background:#eaf1ff;color:#1f6feb;font-weight:700;font-size:15px;display:flex;align-items:center;justify-content:center;margin:0 auto 14px}
.q-item b{display:block;margin-bottom:6px;font-size:15px}
.q-item span{color:var(--muted);font-size:13px;line-height:1.6;display:block}

/* ---------- 关于 ---------- */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.about-grid img{width:100%;border-radius:14px;display:block;box-shadow:0 16px 40px rgba(20,40,80,.12)}
.about p{color:#3d4b63;font-size:15.5px;margin:0 0 14px}
.about ul{padding-left:20px;color:#3d4b63}
.about li{margin:6px 0}

/* ---------- FAQ ---------- */
.faq{max-width:780px;margin:0 auto}
.faq details{border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin-bottom:12px;background:#fff}
.faq summary{cursor:pointer;font-weight:600;font-size:15px;color:var(--ink)}
.faq p{margin:10px 0 0;color:var(--muted);font-size:14px}

/* ---------- 合作 CTA ---------- */
.cta-band{background:linear-gradient(135deg,#12233f,#1d3a66);padding:64px 0;color:#fff;text-align:center}
.cta-band h2{margin-bottom:10px;color:#fff}
.cta-band p{color:#c9d6ec;margin:0 0 26px}

footer{border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:14px;text-align:center}
footer a{color:var(--muted)}
a{color:var(--brand)}

@media(max-width:820px){
  .hero-grid,.about-grid{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:32px}
  .menu a{margin-left:14px;font-size:14px}
  .hero{padding:56px 0}
  .gallery-grid{columns:2}
}