@charset "utf-8";
body {
    background: #0a0a0a;
}
/* ===== Hero ===== */
.hero {
  height: 90vh; min-height: 600px;
  position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url('https://images.unsplash.com/photo-1506905925346-21bda4d32df4?w=1920&q=80') center/cover no-repeat;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, rgba(10,10,10,0.3) 0%, rgba(10,10,10,0.65) 70%, #0a0a0a 100%);
}
.hero-content { position: relative; z-index: 2; max-width: 700px; padding: 0 24px; }
.hero-tag {
  display: inline-block; font-size: 12px; letter-spacing: 4px; text-transform: uppercase;
  color: #d4894a; border: 1px solid rgba(212,137,74,0.5);
  padding: 8px 20px; border-radius: 30px; margin-bottom: 24px;
  opacity: 0; animation: fadeInDown 0.8s 0.2s forwards;
}
.hero-title {color: #fff;font-size: clamp(36px, 6vw, 64px);font-weight: 800;line-height: 1.15;margin-bottom: 18px;opacity: 0;animation: fadeInUp 0.8s 0.4s forwards;}
.hero-title span { color: #d4894a; }
.hero-sub { font-size: 17px; color: rgba(255,255,255,0.55); line-height: 1.75; margin-bottom: 34px; max-width: 550px; margin-left: auto; margin-right: auto; opacity: 0; animation: fadeInUp 0.8s 0.6s forwards; }
.btn-hero {
  display: inline-flex; align-items: center; gap: 8px;
  background: #d4894a; color: #fff; padding: 15px 38px; border-radius: 6px;
  font-size: 15px; font-weight: 600; text-decoration: none;
  transition: all 0.25s; letter-spacing: 1px; border: none; cursor: pointer;
  opacity: 0; animation: fadeInUp 0.8s 0.8s forwards;
}
.btn-hero:hover { background: #c07a3a; transform: translateY(-2px); box-shadow: 0 12px 32px rgba(212,137,74,0.35); }

@keyframes fadeInDown { from{opacity:0;transform:translateY(-24px)} to{opacity:1;transform:translateY(0)} }
@keyframes fadeInUp { from{opacity:0;transform:translateY(24px)} to{opacity:1;transform:translateY(0)} }

/* ===== Section Common ===== */
.section { padding: 100px 50px; }
.section-dark { background: #0f0f12; }
.section-alt { background: #111115; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 {color: #fff;font-size: 34px;font-weight: 700;margin-bottom: 14px;}
.section-header h2 span { color: #d4894a; }
.section-header p { font-size: 15px; color: rgba(255,255,255,0.45); max-width: 560px; margin: 0 auto; line-height: 1.7; }

/* ===== 介绍区 ===== */
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; max-width: 1200px; margin: 0 auto; }
.intro-img { border-radius: 14px; overflow: hidden; aspect-ratio: 4/3; }
.intro-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s; }
.intro-img:hover img { transform: scale(1.05); }
.intro-tag { font-size: 12px; letter-spacing: 3px; color: #d4894a; text-transform: uppercase; margin-bottom: 14px; }
.intro-title { font-size: 28px; font-weight: 700; line-height: 1.3; margin-bottom: 18px; }
.intro-title span { color: #d4894a; }
.intro-desc { font-size: 15px; color: rgba(255,255,255,0.55); line-height: 1.9; margin-bottom: 16px; }

/* ===== 特性网格 ===== */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; max-width: 1200px; margin: 0 auto; }
.feat-card {
  background: #161619; border-radius: 14px; overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.35s;
}
.feat-card:hover { border-color: rgba(212,137,74,0.35); transform: translateY(-6px); box-shadow: 0 20px 40px rgba(0,0,0,0.4); }
.feat-img { aspect-ratio: 16/10; overflow: hidden; }
.feat-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.feat-card:hover .feat-img img { transform: scale(1.08); }
.feat-body { padding: 26px 24px; }
.feat-body h3 {color: #fff;font-size: 17px;font-weight: 700;margin-bottom: 10px;}
.feat-body p { font-size: 13.5px; color: rgba(255,255,255,0.45); line-height: 1.75; }

/* ===== 数据统计 ===== */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); max-width: 1100px; margin: 0 auto; gap: 2px; }
.stat-item { background: #161619; padding: 44px 24px; text-align: center; }
.stat-num { font-size: 46px; font-weight: 800; color: #d4894a; line-height: 1; }
.stat-unit { font-size: 16px; color: #d4894a; font-weight: 400; }
.stat-label { font-size: 13px; color: rgba(255,255,255,0.45); margin-top: 8px; letter-spacing: 1px; }

/* ===== 案例展示 ===== */
.case-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; max-width: 1200px; margin: 0 auto; }
.case-card {
  border-radius: 14px; overflow: hidden; position: relative;
  aspect-ratio: 3/4; cursor: pointer;
}
.case-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s; }
.case-card:hover img { transform: scale(1.08); }
.case-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10,10,10,0.92) 0%, transparent 60%);
  display: flex; flex-direction: column; justify-content: flex-end; padding: 24px;
  opacity: 0; transition: opacity 0.35s;
}
.case-card:hover .case-overlay { opacity: 1; }
.case-overlay h4 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.case-overlay p { font-size: 13px; color: rgba(255,255,255,0.55); }
.case-overlay .loc { font-size: 12px; color: #d4894a; margin-top: 6px; }

/* ===== 流程 ===== */
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; max-width: 1100px; margin: 0 auto; counter-reset: step; }
.step-card {
  background: #161619; border-radius: 14px; padding: 34px 26px;
  border: 1px solid rgba(255,255,255,0.06); text-align: center;
  position: relative; transition: all 0.3s;
}
.step-card:hover { border-color: rgba(212,137,74,0.35); transform: translateY(-4px); }
.step-num {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, #d4894a, #c07a3a);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 800; margin: 0 auto 20px;
}
.step-card h4 {color: #fff;font-size: 16px;font-weight: 700;margin-bottom: 10px;}
.step-card p { font-size: 13px; color: rgba(255,255,255,0.45); line-height: 1.7; }
.step-arrow {
  position: absolute; right: -18px; top: 50%;
  transform: translateY(-50%); color: rgba(255,255,255,0.1); font-size: 22px;
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, rgba(212,137,74,0.15), rgba(212,137,74,0.05));
  border-top: 1px solid rgba(212,137,74,0.2);
  border-bottom: 1px solid rgba(212,137,74,0.2);
  padding: 80px 50px; text-align: center;
}
.cta-section h2 {color: #fff;font-size: 32px;font-weight: 700;margin-bottom: 14px;}
.cta-section p { font-size: 15px; color: rgba(255,255,255,0.5); margin-bottom: 30px; max-width: 500px; margin-left: auto; margin-right: auto; line-height: 1.7; }
.cta-btns { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.btn-primary { display: inline-flex; align-items: center; gap: 8px; background: #d4894a; color: #fff; padding: 13px 32px; border-radius: 6px; font-size: 14px; font-weight: 600; text-decoration: none; transition: all 0.25s; letter-spacing: 1px; }
.btn-primary:hover { background: #c07a3a; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,137,74,0.3); }
.btn-outline { display: inline-flex; align-items: center; gap: 8px; border: 1px solid rgba(255,255,255,0.25); color: rgba(255,255,255,0.8); padding: 13px 32px; border-radius: 6px; font-size: 14px; font-weight: 600; text-decoration: none; transition: all 0.25s; letter-spacing: 1px; }
.btn-outline:hover { border-color: #d4894a; color: #d4894a; }


/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .navbar { padding: 14px 20px; } .nav-menu { display: none; }
  .section { padding: 70px 20px; }
  .intro-grid { grid-template-columns: 1fr; gap: 40px; }
  .feature-grid, .case-gallery { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .step-arrow { display: none; }
  .cta-section, .footer { padding-left: 20px; padding-right: 20px; }
  .footer-inner { flex-direction: column; text-align: center; }
}
@media (max-width: 600px) {
  .hero { height: 70vh; min-height: 500px; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .stat-num { font-size: 36px; }
}