/* XAutoLab — SpaceX-inspired visual language v2
   纯黑 + 光谱白 + 全大写 + 宽字距 + ghost 按钮 + 零装饰
*/
:root {
  --black: #000000;
  --bg: #000000;
  --bg2: #050505;
  --card: #0a0a0a;
  --line: rgba(240,240,250,0.14);
  --text: #f0f0fa;
  --text-dim: rgba(240,240,250,0.68);
  --text-faint: rgba(240,240,250,0.5);
  --accent: #f0f0fa;
  --ghost-bg: rgba(240,240,250,0.08);
  --ghost-border: rgba(240,240,250,0.35);
  --hover: #ffffff;
  --sale: #f0f0fa;
  --track: 0.08em;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  font-family: 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
/* 全站噪点质感层（fixed 伪元素，3% grain，不挡交互） */
body::after {
  content:""; position:fixed; inset:0; z-index:50; pointer-events:none;
  opacity:.035;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size:180px 180px;
}
a { color: var(--text); text-decoration: none; }
img { max-width:100%; height:auto; display:block; }
.container { max-width:1280px; margin:0 auto; padding:0 24px; }

/* 全大写 + 宽字距系统 */
.nav a, .btn, .site-header, h1, h2, h3, .micro, .prod-card h3,
.page-hero h1, .cat-card h3, .blog-card h3, .prod-card .price,
.site-footer h4, .site-footer a, .form-group label, table.compare {
  text-transform: uppercase;
  letter-spacing: var(--track);
}

/* ===== Header ===== */
.site-header {
  position: sticky; top:0; z-index:100;
  background: rgba(0,0,0,0.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav { display:flex; align-items:center; justify-content:space-between; height:70px; }
.logo { font-weight:700; font-size:1.15rem; color:var(--text); letter-spacing:0.12em; text-transform:uppercase; }
.logo .dot { color: rgba(240,240,250,.85); }
.nav-links { display:flex; gap:28px; align-items:center; }
.nav-links a { color: var(--text-dim); font-size:.75rem; font-weight:600; letter-spacing:0.12em; text-transform:uppercase; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-cta {
  background: var(--ghost-bg); color: var(--text) !important;
  border:1px solid var(--ghost-border); border-radius:32px;
  padding:8px 20px; font-size:.72rem; letter-spacing:0.14em; font-weight:700;
}
.nav-cta:hover { background: rgba(240,240,250,0.16); }
.nav-toggle { display:none; background:none; border:none; color:var(--text); font-size:1.5rem; cursor:pointer; }

/* ===== Hero: 全屏大图 + 文字浮图 ===== */
.hero {
  position:relative; min-height:88vh; display:flex; align-items:flex-end;
  background: #000;
  overflow:hidden;
}
.hero-bg { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; opacity:.75; }
/* 关键：压暗遮罩只在下半部，保住图片可见性又保证文字可读 */
.hero::after {
  content:""; position:absolute; inset:0; z-index:1;
  background:
    linear-gradient(to top, rgba(0,0,0,.96) 0%, rgba(0,0,0,.8) 30%, rgba(0,0,0,.42) 60%, rgba(0,0,0,.12) 100%);
  pointer-events:none;
}
.hero .container { position:relative; z-index:2; padding-bottom:56px; }
.hero-label { font-size:.72rem; letter-spacing:0.22em; text-transform:uppercase; color:rgba(240,240,250,.75); margin-bottom:12px; font-weight:600; }
.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 3.4rem); font-weight:700; line-height:1.08;
  text-transform:uppercase; letter-spacing:0.06em; max-width:900px; margin-bottom:18px;
  color:#fff; text-shadow: 0 2px 24px rgba(0,0,0,.6);
}
.hero p { font-size:1rem; color:rgba(240,240,250,.88); max-width:600px; margin-bottom:26px; letter-spacing:0.02em; }
.hero-badges { display:flex; gap:16px 24px; flex-wrap:wrap; color:rgba(240,240,250,.7); font-size:.68rem; text-transform:uppercase; letter-spacing:0.12em; margin-bottom:18px; font-weight:600; }
.hero-badges b { color:#fff; font-weight:600; }
.hero-cta { display:flex; gap:14px; flex-wrap:wrap; }

/* ===== Buttons (ghost 为主) ===== */
.btn { display:inline-block; padding:14px 30px; border-radius:32px; font-size:.75rem; font-weight:700; letter-spacing:0.14em; cursor:pointer; border:none; text-transform:uppercase; transition:.2s; }
.btn-primary { background: #f0f0fa; color:#000; border:1px solid #f0f0fa; font-weight:700; }
.btn-primary:hover { background:#fff; }
.btn-outline { border:1px solid rgba(240,240,250,.45); color:var(--text); background:rgba(0,0,0,.25); }
.btn-outline:hover { border-color:var(--text); background:rgba(240,240,250,.08); }
.btn-lg { padding:16px 36px; font-size:.8rem; }
.btn-sm { padding:10px 18px; font-size:.68rem; border-radius:24px; }
.btn-detail { border:1px solid var(--line); color:var(--text-dim); background:transparent; }
.btn-detail:hover { border-color:var(--ghost-border); color:var(--text); }
.btn-quote { background:var(--ghost-bg); border:1px solid var(--ghost-border); color:var(--text); }
.btn-quote:hover { background:rgba(240,240,250,0.18); }
/* 产品卡内的 GET QUOTE 做主视觉 */
.prod-card .btn-quote { background:#f0f0fa; color:#000; border-color:#f0f0fa; font-weight:700; }
.prod-card .btn-quote:hover { background:#fff; }

/* ===== Trust bar (hero 下方卖点条) ===== */
.trustbar { border-bottom:1px solid var(--line); background:#030303; }
.trustbar .container { display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap; padding-top:16px; padding-bottom:16px; }
.trustbar span { font-size:.68rem; letter-spacing:0.14em; text-transform:uppercase; color:rgba(240,240,250,.85); font-weight:600; }
.trustbar i { width:4px; height:4px; border-radius:50%; background:rgba(240,240,250,.45); }

/* ===== Sections ===== */
.section { padding:80px 0; border-bottom:1px solid var(--line); }
.section-alt { background:var(--bg2); }
.section h2 { font-size:1.4rem; font-weight:700; margin-bottom:8px; letter-spacing:0.1em; }
.section .sub { color:var(--text-dim); margin-bottom:40px; max-width:600px; font-size:.9rem; }
.section-head { display:flex; justify-content:space-between; align-items:flex-end; margin-bottom:36px; flex-wrap:wrap; gap:12px; }
.section-head h2 { margin:0; }
.section-head a { font-size:.72rem; color:rgba(240,240,250,.75); letter-spacing:0.12em; text-transform:uppercase; }
.section-head a:hover { color:var(--text); }
.micro { font-size:.7rem; letter-spacing:0.2em; text-transform:uppercase; color:var(--text-faint); font-weight:600; }

/* ===== Category (纯文字 + 细线,无卡片感) ===== */
.cat-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:1px; background:var(--line); border:1px solid var(--line); }
.cat-card { background:var(--bg); padding:36px 28px; transition:.25s; }
.cat-card:hover { background:#0a0a0a; }
.cat-card h3 { font-size:.95rem; font-weight:700; letter-spacing:0.1em; margin-bottom:10px; }
.cat-card p { color:var(--text-dim); font-size:.8rem; margin-bottom:16px; line-height:1.5; text-transform:none; letter-spacing:0; }
.cat-card .count { color:var(--text-faint); font-size:.68rem; font-weight:600; letter-spacing:0.15em; text-transform:uppercase; }

/* ===== Product grid (Double-Bezel 嵌套卡) ===== */
.prod-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:22px; }
.prod-card {
  background:#101418; display:flex; flex-direction:column;
  border:1px solid rgba(240,240,250,.16); border-radius:20px; padding:8px;
  transition:transform .25s cubic-bezier(.32,.72,0,1), border-color .25s;
}
.prod-card:hover { border-color:rgba(240,240,250,.38); transform:translateY(-4px); }
.prod-card .img-wrap { position:relative; aspect-ratio:4/3; background:#0a0d11; display:flex; align-items:center; justify-content:center; overflow:hidden; border-radius:14px; border:1px solid rgba(240,240,250,.08); }
/* SALE 徽章放图片左上角 */
.prod-card .img-wrap .sale-flag {
  position:absolute; top:10px; left:10px; z-index:2;
  background:rgba(0,0,0,.65); border:1px solid rgba(240,240,250,.4);
  color:#fff; font-size:.6rem; font-weight:700; letter-spacing:.12em;
  padding:3px 10px; border-radius:6px; text-transform:uppercase;
  backdrop-filter:blur(4px);
}
.prod-card .img-wrap img { width:100%; height:100%; object-fit:contain; transition:opacity .3s; }
.prod-card:hover .img-wrap img { opacity:.82; }
.prod-card .body { padding:18px 14px 12px; display:flex; flex-direction:column; flex:1; }
.prod-card h3 { font-size:.95rem; font-weight:500; line-height:1.4; margin-bottom:12px; letter-spacing:.01em; flex:1; text-transform:none; }
.prod-card h3 a { color:var(--text); }
.prod-card h3 a:hover { color:var(--text-dim); }
.prod-card .price-row { display:flex; align-items:baseline; gap:12px; margin-bottom:16px; font-variant-numeric:tabular-nums; }
.prod-card .price { font-weight:700; font-size:1.15rem; color:var(--text); letter-spacing:.02em; }
.prod-card .price.old { color:var(--text-faint); text-decoration:line-through; font-size:.85rem; font-weight:400; }
.prod-card .price .sale-badge { background:transparent; border:1px solid var(--ghost-border); color:var(--text); font-size:.6rem; padding:2px 8px; border-radius:20px; margin-left:8px; font-weight:600; letter-spacing:.1em; }
.prod-card .cta-row { display:flex; gap:8px; align-items:stretch; }
.prod-card .cta-row .btn { flex:1; display:inline-flex; align-items:center; justify-content:center; }

/* Button-in-Button 箭头圆珠 */
.btn-orb {
  display:inline-flex; align-items:center; justify-content:center;
  width:22px; height:22px; margin-left:10px; border-radius:50%;
  background:rgba(0,0,0,.12); font-size:.7rem; line-height:1;
  transition:transform .25s cubic-bezier(.32,.72,0,1), background .25s;
}
.btn-orb-lg { width:28px; height:28px; font-size:.85rem; margin-left:14px; background:rgba(0,0,0,.15); }
.btn:hover .btn-orb { transform:translate(2px,-2px); background:rgba(0,0,0,.22); }
.btn-quote:hover .btn-orb { transform:translate(2px,-2px) scale(1.06); }

/* 级联入场动画（纯 transform+opacity） */
.reveal { opacity:0; transform:translateY(18px); transition:opacity .7s cubic-bezier(.32,.72,0,1), transform .7s cubic-bezier(.32,.72,0,1); will-change:transform,opacity; }
.reveal.in { opacity:1; transform:translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity:1; transform:none; transition:none; }
  html { scroll-behavior:auto; }
}

/* ===== Compare ===== */
.compare-wrap { overflow-x:auto; }
table.compare { width:100%; border-collapse:collapse; min-width:820px; }
table.compare th, table.compare td { padding:14px 18px; border:1px solid var(--line); text-align:left; font-size:.82rem; }
table.compare thead th { background:#050505; font-size:.75rem; letter-spacing:0.1em; font-weight:700; }
table.compare tbody th { color:var(--text-dim); font-weight:500; width:190px; white-space:nowrap; text-transform:uppercase; font-size:.7rem; letter-spacing:0.1em; }
table.compare .price { font-weight:700; color:var(--text); font-size:1.05rem; }
.hl-col { background:rgba(240,240,250,0.03); }

/* ===== Product detail ===== */
.pd-wrap { display:grid; grid-template-columns:1.05fr 1fr; gap:56px; padding:56px 0; }
.pd-gallery .main-img { border:1px solid var(--line); background:#060606; display:flex; align-items:center; justify-content:center; }
.pd-gallery .main-img img { max-height:560px; width:100%; object-fit:contain; }
.pd-gallery .thumbs { display:flex; gap:8px; margin-top:10px; flex-wrap:wrap; }
.pd-gallery .thumbs img { width:66px; height:66px; object-fit:contain; background:#060606; border:1px solid var(--line); cursor:pointer; }
.pd-gallery .thumbs img.on { border-color:var(--ghost-border); }
.pd-info h1 { font-size:1.7rem; font-weight:700; line-height:1.2; text-transform:uppercase; letter-spacing:0.06em; }
.pd-info .price-box { display:flex; align-items:baseline; gap:16px; margin:24px 0 4px; }
.pd-info .price { font-size:2rem; font-weight:700; color:var(--text); letter-spacing:0.03em; }
.pd-info .price.old { color:var(--text-faint); text-decoration:line-through; font-size:1.2rem; }
.pd-info .save { border:1px solid var(--ghost-border); color:var(--text-dim); font-size:.65rem; padding:3px 12px; border-radius:20px; font-weight:600; letter-spacing:0.15em; text-transform:uppercase; }
.pd-info .sku { color:var(--text-faint); font-size:.72rem; letter-spacing:0.12em; text-transform:uppercase; margin-bottom:16px; }
.pd-cta { display:flex; gap:14px; flex-wrap:wrap; margin:28px 0; }
.pd-desc { color:var(--text-dim); margin-bottom:16px; }
.pd-note { border:1px dashed rgba(240,240,250,0.2); padding:16px 20px; font-size:.82rem; color:var(--text-dim); margin-top:18px; letter-spacing:0; text-transform:none; }

/* ===== Rich content ===== */
.rich { padding:36px 0 70px; max-width:900px; margin:0 auto; }
.rich h2, .rich h3 { margin:36px 0 14px; font-weight:700; letter-spacing:0.06em; }
.rich h3 { font-size:1.2rem; text-transform:uppercase; }
.rich h2 { font-size:1.5rem; text-transform:uppercase; }
.rich p { margin:14px 0; color:rgba(240,240,250,0.75); font-size:.95rem; }
.rich ul, .rich ol { margin:14px 0 14px 22px; }
.rich li { margin:8px 0; color:rgba(240,240,250,0.75); }
.rich strong { color:var(--text); }
.rich img { border-radius:0; margin:18px 0; border:1px solid var(--line); }
.rich table { border-collapse:collapse; width:100%; margin:18px 0; }
.rich table td, .rich table th { border:1px solid var(--line); padding:10px 14px; font-size:.85rem; }
.rich blockquote { border-left:2px solid var(--ghost-border); padding:4px 20px; color:var(--text-dim); margin:16px 0; }

/* ===== Blog ===== */
.blog-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(340px,1fr)); gap:1px; background:var(--line); border:1px solid var(--line); }
.blog-card { background:var(--bg); padding:32px 28px; }
.blog-card:hover { background:#0a0a0a; }
.blog-card h3 { font-size:.95rem; line-height:1.5; font-weight:600; }
.blog-card h3 a { color:var(--text); }
.blog-card .date { color:var(--text-faint); font-size:.7rem; margin-top:12px; letter-spacing:0.12em; text-transform:uppercase; }
.article-body { max-width:860px; margin:0 auto; padding:60px 24px; }
.article-body h1 { font-size:2rem; margin-bottom:26px; line-height:1.25; text-transform:uppercase; letter-spacing:0.04em; font-weight:700; }

/* ===== Page hero (内页) ===== */
.page-hero { padding:90px 0 50px; border-bottom:1px solid var(--line); }
.page-hero h1 { font-size:2rem; font-weight:700; letter-spacing:0.06em; text-transform:uppercase; }
.page-hero p { color:var(--text-dim); margin-top:14px; max-width:680px; font-size:.95rem; }
.breadcrumb { color:var(--text-faint); font-size:.68rem; letter-spacing:0.12em; text-transform:uppercase; margin-bottom:20px; }
.breadcrumb a { color:var(--text-faint); }
.breadcrumb a:hover { color:var(--text); }
.empty { color:var(--text-faint); padding:50px 0; text-align:center; letter-spacing:0.1em; text-transform:uppercase; font-size:.8rem; }

/* ===== Contact / forms ===== */
.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); }
.contact-grid > div { background:var(--bg); padding:40px; }
.lead-form h3 { font-size:.9rem; font-weight:700; margin-bottom:14px; letter-spacing:0.12em; }
.form-group { margin-bottom:18px; }
.form-group label { display:block; font-size:.68rem; margin-bottom:8px; color:var(--text-faint); letter-spacing:0.15em; }
.form-group input, .form-group select, .form-group textarea {
  width:100%; padding:13px 16px; background:#050505; border:1px solid var(--line);
  border-radius:0; color:var(--text); font-size:.9rem; font-family:inherit; letter-spacing:0.02em;
}
.form-group input:focus, .form-group textarea:focus { outline:none; border-color:var(--ghost-border); }
.grid-2 { display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); }
.grid-2 > div { background:var(--bg); padding:36px; }
.check-list li { list-style:none; padding:8px 0 8px 26px; position:relative; color:rgba(240,240,250,0.75); font-size:.9rem; }
.check-list li:before { content:"—"; position:absolute; left:0; color:var(--text-dim); }
.check-list { margin:16px 0; }

/* ===== Footer ===== */
.site-footer { border-top:1px solid var(--line); padding:60px 0 30px; background:#000; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:36px; }
.site-footer h4 { font-size:.75rem; margin-bottom:16px; letter-spacing:0.16em; }
.site-footer a { display:block; color:rgba(240,240,250,.65); font-size:.78rem; padding:4px 0; letter-spacing:0.05em; text-transform:none; }
.site-footer a:hover { color:var(--text); }
.site-footer p { color:var(--text-faint); font-size:.8rem; }
.footer-bottom { border-top:1px solid var(--line); margin-top:44px; padding-top:20px; color:var(--text-faint); font-size:.7rem; letter-spacing:0.08em; text-transform:uppercase; display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; }

@media (max-width: 900px) {
  .hero { min-height:78vh; }
  .hero h1 { font-size:1.55rem; letter-spacing:0.04em; }
  .hero p { font-size:.92rem; margin-bottom:22px; }
  .hero-badges { gap:10px 18px; font-size:.62rem; margin-bottom:14px; }
  .hero-label { font-size:.62rem; margin-bottom:10px; }
  .hero .container { padding-bottom:40px; }
  .hero-cta .btn { width:100%; text-align:center; }
  .trustbar .container { justify-content:flex-start; gap:10px 16px; padding-top:14px; padding-bottom:14px; }
  .trustbar i { display:none; }
  .trustbar span { font-size:.6rem; }
  .pd-wrap { grid-template-columns:1fr; gap:32px; }
  .contact-grid, .grid-2, .footer-grid { grid-template-columns:1fr; }
  .grid-2 > div, .contact-grid > div { padding:26px 20px; }
  .section { padding:56px 0; }
  .nav-links { display:none; position:absolute; top:70px; left:0; right:0; background:#000; border-bottom:1px solid var(--line); padding:24px; flex-direction:column; gap:18px; align-items:flex-start; }
  .nav-links.open { display:flex; }
  .nav-toggle { display:block; }
  .logo .dot { color:rgba(240,240,250,.7); }
  .prod-card .body { padding:18px 18px 22px; }
  .prod-card .cta-row { gap:8px; }
  .prod-card .cta-row .btn { flex:1; text-align:center; }
  .page-hero { padding:60px 0 36px; }
  .page-hero h1 { font-size:1.5rem; }
  .site-footer { padding:44px 0 24px; }
  .footer-bottom { flex-direction:column; gap:8px; }
}