/* ============================================
   模板 1: shangye - 商业都市
   风格:深空黑+霓虹金、玻璃拟态、几何线条
   适配:上海、深圳、广州、郑州等大都市
   ============================================ */
:root {
  --c-bg: #0B0E16;
  --c-bg-alt: #131826;
  --c-card: rgba(255,255,255,0.04);
  --c-text: #E5EAF2;
  --c-text-2: #A6B0C0;
  --c-text-3: #6B7280;
  --c-accent: #FFB800;
  --c-accent-2: #FF6B35;
  --c-border: rgba(255,255,255,0.08);
  --c-grad-1: linear-gradient(135deg, #FFB800 0%, #FF6B35 100%);
  --c-grad-2: linear-gradient(135deg, rgba(255,184,0,0.15), rgba(255,107,53,0.05));
  --c-glass: rgba(255,255,255,0.06);
  --c-glass-border: rgba(255,255,255,0.1);
  --font-body: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans CN","Noto Sans SC",-apple-system,BlinkMacSystemFont,sans-serif;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { font-size:16px; -webkit-font-smoothing:antialiased; scroll-behavior:smooth; }
body { font-family:var(--font-body); background:var(--c-bg); color:var(--c-text); line-height:1.7; overflow-x:hidden; }
a { color:inherit; text-decoration:none; }
img { max-width:100%; display:block; }
.container { max-width:1280px; margin:0 auto; padding:0 24px; }

/* Banner */
.sy-hero { position:relative; min-height:92vh; display:flex; flex-direction:column; overflow:hidden; background:radial-gradient(ellipse 80% 60% at 50% 0%, rgba(255,184,0,0.18), transparent 60%), var(--c-bg); }
.sy-hero::before { content:""; position:absolute; inset:0; background:linear-gradient(180deg, transparent 0%, transparent 50%, rgba(11,14,22,0.5) 100%), repeating-linear-gradient(90deg, transparent 0, transparent 79px, rgba(255,255,255,0.03) 80px), repeating-linear-gradient(0deg, transparent 0, transparent 79px, rgba(255,255,255,0.03) 80px); pointer-events:none; }
.sy-hero::after { content:""; position:absolute; top:15%; right:-10%; width:60vw; height:60vw; background:radial-gradient(circle, rgba(255,184,0,0.12), transparent 60%); filter:blur(40px); pointer-events:none; }
.sy-nav { position:relative; z-index:5; padding:24px 0; }
.sy-nav-inner { display:flex; justify-content:space-between; align-items:center; }
.sy-logo { display:flex; align-items:baseline; gap:8px; font-size:20px; font-weight:700; }
.sy-logo sup { color:var(--c-accent); font-size:10px; }
.sy-logo span.tag { color:var(--c-text-2); font-size:13px; font-weight:400; margin-left:4px; }
.sy-nav-links { display:flex; gap:28px; list-style:none; font-size:14px; }
.sy-nav-links a { color:var(--c-text-2); transition:color .2s; }
.sy-nav-links a:hover, .sy-nav-links a.cta { color:var(--c-accent); }
.sy-hero-body { position:relative; z-index:3; flex:1; display:flex; align-items:center; padding:60px 0 80px; }
.sy-eyebrow { display:inline-flex; align-items:center; gap:8px; padding:6px 16px; border:1px solid var(--c-glass-border); background:var(--c-glass); backdrop-filter:blur(10px); border-radius:999px; font-size:13px; color:var(--c-accent); margin-bottom:24px; }
.sy-eyebrow::before { content:""; width:6px; height:6px; border-radius:50%; background:var(--c-accent); box-shadow:0 0 12px var(--c-accent); }
.sy-title { font-size:clamp(36px, 5.5vw, 64px); font-weight:800; line-height:1.15; margin-bottom:24px; letter-spacing:-1px; }
.sy-title em { font-style:normal; background:var(--c-grad-1); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.sy-sub { font-size:18px; color:var(--c-text-2); max-width:780px; margin-bottom:36px; }
.sy-actions { display:flex; gap:16px; flex-wrap:wrap; }
.sy-btn { display:inline-flex; align-items:center; gap:8px; padding:14px 28px; border-radius:8px; font-size:15px; font-weight:600; transition:all .25s; cursor:pointer; }
.sy-btn-pri { background:var(--c-grad-1); color:#0B0E16; }
.sy-btn-pri:hover { transform:translateY(-2px); box-shadow:0 12px 28px rgba(255,184,0,0.3); }
.sy-btn-ghost { background:var(--c-glass); border:1px solid var(--c-glass-border); color:var(--c-text); backdrop-filter:blur(10px); }
.sy-stats { display:grid; grid-template-columns:repeat(4,1fr); gap:32px; margin-top:80px; padding-top:40px; border-top:1px solid var(--c-border); }
.sy-stat-num { font-size:42px; font-weight:800; background:var(--c-grad-1); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.sy-stat-num small { font-size:18px; margin-left:4px; }
.sy-stat-lbl { font-size:13px; color:var(--c-text-3); margin-top:6px; }

/* Section */
.sy-sec { padding:96px 0; position:relative; }
.sy-sec-alt { background:var(--c-bg-alt); }
.sy-head { text-align:center; margin-bottom:64px; }
.sy-eye { display:inline-block; font-size:12px; letter-spacing:3px; color:var(--c-accent); margin-bottom:12px; font-weight:600; }
.sy-h2 { font-size:clamp(28px, 3.5vw, 44px); font-weight:800; margin-bottom:16px; letter-spacing:-0.5px; }
.sy-h2 em { font-style:normal; color:var(--c-accent); }
.sy-desc { font-size:16px; color:var(--c-text-2); max-width:720px; margin:0 auto; }

/* Service cards */
.sy-grid { display:grid; grid-template-columns:repeat(3, 1fr); gap:24px; }
.sy-card { background:var(--c-card); border:1px solid var(--c-border); border-radius:16px; padding:32px; transition:all .3s; position:relative; overflow:hidden; }
.sy-card::before { content:""; position:absolute; top:0; left:0; right:0; height:2px; background:var(--c-grad-1); transform:scaleX(0); transform-origin:left; transition:transform .4s; }
.sy-card:hover { transform:translateY(-4px); border-color:var(--c-glass-border); background:var(--c-glass); }
.sy-card:hover::before { transform:scaleX(1); }
.sy-card-icon { width:48px; height:48px; border-radius:12px; background:var(--c-grad-2); display:flex; align-items:center; justify-content:center; color:var(--c-accent); margin-bottom:20px; }
.sy-card h3 { font-size:20px; margin-bottom:12px; }
.sy-card p { font-size:14px; color:var(--c-text-2); }
.sy-tags { display:flex; flex-wrap:wrap; gap:8px; margin-top:16px; }
.sy-tags li { list-style:none; font-size:12px; padding:4px 10px; border-radius:999px; background:rgba(255,184,0,0.1); color:var(--c-accent); }

/* Strength */
.sy-strength-grid { display:grid; grid-template-columns:repeat(6, 1fr); gap:16px; margin-bottom:48px; }
.sy-strength { text-align:center; padding:32px 16px; background:var(--c-card); border-radius:12px; border:1px solid var(--c-border); }
.sy-strength-n { font-size:36px; font-weight:800; background:var(--c-grad-1); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.sy-strength-s { font-size:14px; color:var(--c-text-2); margin-top:4px; }
.sy-strength-l { font-size:12px; color:var(--c-text-3); margin-top:8px; }

/* Cases */
.sy-cases { display:grid; grid-template-columns:repeat(3, 1fr); gap:24px; }
.sy-case { background:var(--c-card); border:1px solid var(--c-border); border-radius:16px; overflow:hidden; transition:all .3s; }
.sy-case:hover { transform:translateY(-4px); }
.sy-case-cover { height:180px; background:var(--c-grad-1); position:relative; overflow:hidden; }
.sy-case-cover::after { content:""; position:absolute; inset:0; background:linear-gradient(135deg, rgba(11,14,22,0.4), rgba(255,184,0,0.3)); }
.sy-case-tag { position:absolute; top:16px; left:16px; padding:4px 12px; background:rgba(11,14,22,0.6); backdrop-filter:blur(8px); border-radius:6px; font-size:12px; z-index:2; }
.sy-case-body { padding:24px; }
.sy-case h4 { font-size:18px; margin-bottom:8px; }
.sy-case p { font-size:13px; color:var(--c-text-2); }
.sy-case-meta { display:flex; flex-wrap:wrap; gap:6px; margin-top:16px; }
.sy-case-meta span { font-size:11px; padding:3px 8px; border-radius:4px; background:var(--c-bg-alt); color:var(--c-text-3); }

/* FAQ */
.sy-faq { max-width:880px; margin:0 auto; }
.sy-faq-item { background:var(--c-card); border:1px solid var(--c-border); border-radius:12px; margin-bottom:12px; padding:20px 24px; }
.sy-faq-item summary { list-style:none; cursor:pointer; display:flex; justify-content:space-between; align-items:center; font-size:16px; font-weight:600; }
.sy-faq-item summary::-webkit-details-marker { display:none; }
.sy-faq-item p { margin-top:16px; padding-top:16px; border-top:1px solid var(--c-border); font-size:14px; color:var(--c-text-2); }
.sy-faq-item summary::after { content:"+"; font-size:24px; color:var(--c-accent); transition:transform .2s; }
.sy-faq-item[open] summary::after { transform:rotate(45deg); }

/* Contact */
.sy-contact-grid { display:grid; grid-template-columns:repeat(3, 1fr); gap:20px; }
.sy-contact { padding:32px; background:var(--c-card); border:1px solid var(--c-border); border-radius:12px; text-align:center; }
.sy-contact-icon { width:48px; height:48px; margin:0 auto 16px; border-radius:50%; background:var(--c-grad-2); color:var(--c-accent); display:flex; align-items:center; justify-content:center; }
.sy-contact-l { font-size:13px; color:var(--c-text-3); }
.sy-contact-v { font-size:18px; font-weight:700; margin:8px 0; }
.sy-contact-t { font-size:12px; color:var(--c-text-3); }

/* Footer */
.sy-foot { background:#060810; padding:64px 0 24px; border-top:1px solid var(--c-border); }
.sy-foot-main { display:grid; grid-template-columns:1.5fr 1fr 1fr 1fr; gap:48px; margin-bottom:48px; }
.sy-foot h4 { font-size:14px; color:var(--c-accent); margin-bottom:16px; letter-spacing:1px; }
.sy-foot ul { list-style:none; }
.sy-foot li { font-size:13px; color:var(--c-text-2); margin-bottom:8px; }
.sy-foot a:hover { color:var(--c-accent); }
.sy-foot-brand p { font-size:13px; color:var(--c-text-2); margin-top:12px; }
.sy-foot-cities { padding:32px 0; border-top:1px solid var(--c-border); border-bottom:1px solid var(--c-border); }
.sy-foot-cities h5 { font-size:13px; color:var(--c-accent); margin-bottom:16px; }
.sy-foot-cities-grid { display:grid; grid-template-columns:repeat(10, 1fr); gap:8px 16px; }
.sy-foot-cities-grid a { font-size:12px; color:var(--c-text-3); padding:4px 0; }
.sy-foot-cities-grid a:hover { color:var(--c-accent); }
.sy-foot-bot { padding-top:24px; text-align:center; font-size:12px; color:var(--c-text-3); }

@media (max-width: 980px) {
  .sy-grid, .sy-cases, .sy-contact-grid { grid-template-columns:1fr; }
  .sy-strength-grid { grid-template-columns:repeat(2, 1fr); }
  .sy-foot-main { grid-template-columns:1fr 1fr; }
  .sy-foot-cities-grid { grid-template-columns:repeat(4, 1fr); }
  .sy-nav-links { display:none; }
  .sy-stats { grid-template-columns:repeat(2, 1fr); }
}