:root {
  --orange: #F06A2C;
  --orange-light: #FFF3EB;
  --orange-dark: #C8521E;
  --blue: #1A56A8;
  --blue-light: #E8F0FB;
  --dark: #18191C;
  --dark2: #2A2C30;
  --gray: #6B7280;
  --gray-light: #F8F9FA;
  --green: #1D9E75;
  --green-light: #E1F5EE;
  --white: #FFFFFF;
  --text-primary: #18191C;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;
  --border-light: #E5E7EB;
  --border-card: #E5E7EB;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.08);
  --shadow-xl: 0 16px 60px rgba(0,0,0,0.1);
  --shadow-orange: 0 8px 32px rgba(240,106,44,0.2);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ========== Hero ========== */
.hero {
  padding:80px 0;
  background:url('/uploads/allimg/260701/OE-AIPaaS_banner.jpg') no-repeat;
  background-size: cover;background-position: center right;
  position:relative; overflow:hidden; min-height:560px;
  display:flex; align-items:center;
}
.hero::before {
  content:''; position:absolute; top:-200px; right:-100px;
  width:600px; height:600px; border-radius:50%;
  background:radial-gradient(circle,rgba(240,106,44,.15) 0%,transparent 70%);
  pointer-events:none;
  animation:pulse-glow 8s ease-in-out infinite;
}
.hero::after {
  content:''; position:absolute; bottom:-100px; left:-80px;
  width:500px; height:500px; border-radius:50%;
  background:radial-gradient(circle,rgba(26,86,168,.12) 0%,transparent 70%);
  pointer-events:none;
}
@keyframes pulse-glow {
  0%,100%{opacity:1;transform:scale(1);}
  50%{opacity:.7;transform:scale(1.05);}
}
.hero .container { position:relative; z-index:1; }
.hero .badge-tag {
  display:inline-flex; align-items:center; gap:6px;
  background:rgba(240,106,44,.15); color:var(--orange);
  font-size:18px; font-weight:600;
  padding:8px 18px; border-radius:20px;
  border:1px solid rgba(240,106,44,.25);
  margin-bottom:24px;
}
.hero h1 {
  font-size:48px; font-weight:600;
  line-height:1.2; margin-bottom:24px; letter-spacing:-0.5px;
}
.hero h1 em {
  font-style:normal;
  background:linear-gradient(135deg,var(--orange),#FF8C42);
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero .subtitle {
  font-size:18px;
  margin-bottom:40px; max-width:680px; font-weight:400; line-height:1.85;
}
.hero-btns { display:flex; gap:20px; flex-wrap:wrap; }

.btn-primary {
  background:linear-gradient(135deg,var(--orange),#FF8C42);
  color:#fff; padding:14px 32px; border-radius:var(--radius-md);
  font-size:15px; font-weight:600; border:none; cursor:pointer;
  transition:var(--transition);
  display:inline-flex; align-items:center; gap:8px;
  box-shadow:0 4px 16px rgba(240,106,44,0.3);
}
.btn-primary:hover {
  background:linear-gradient(135deg,var(--orange-dark),var(--orange));
  transform:translateY(-2px);
  box-shadow:0 8px 28px rgba(240,106,44,0.4);
}
.btn-secondary {
  background:rgba(255,255,255,.08); color:#fff;
  padding:14px 32px; border-radius:var(--radius-md);
  font-size:15px; font-weight:600;
  border:1px solid rgba(255,255,255,.15);
  cursor:pointer; transition:var(--transition);
  display:inline-flex; align-items:center; gap:8px;
}
.btn-secondary:hover {
  background:rgba(255,255,255,.14);
  border-color:rgba(255,255,255,.25);
  transform:translateY(-1px);
}

/* ========== Stats Band ========== */
.stats-band {
  padding:48px 0;
  background:var(--white);
  border-bottom:1px solid var(--border-light);
}
.stats-grid {
  display:grid; grid-template-columns:repeat(4,1fr); gap:32px;
  text-align:center;
}
.stat-item .num {
  font-size:48px; font-weight:900; color:var(--orange);
  line-height:1.1; margin-bottom:8px;
}
.stat-item .label {
  font-size:15px; color:var(--text-secondary); font-weight:500;
}

/* ========== Architecture Brief ========== */
.arch-brief {
  padding: 80px 0;padding: 5vmax 0; background:var(--white);
}
.section-header { text-align:center; margin-bottom:56px; }
.section-header .tag {
  display:inline-block; font-size:12px; color:var(--orange);
  background:var(--orange-light); padding:6px 14px; border-radius:6px;
  font-weight:600; letter-spacing:.08em; margin-bottom:16px;
}
.section-header h2 { font-size:36px; font-weight:700; margin-bottom:12px; letter-spacing:-.3px; }
.section-header p { color:var(--text-secondary); font-size:16px; max-width:620px; margin:0 auto; line-height:1.7; }

.arch-brief-grid {
  display:grid; grid-template-columns:repeat(4,1fr); gap:20px;
}
.arch-brief-card {
  background:var(--white); border-radius:var(--radius-lg);
  padding:28px 24px; border:1px solid var(--border-card);
  transition:var(--transition); position:relative; overflow:hidden;
}
.arch-brief-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:3px;
  transform:scaleX(0); transition:transform .3s ease; transform-origin:left;
}
.arch-brief-card:hover::before { transform:scaleX(1); }
.arch-brief-card:nth-child(1)::before { background:linear-gradient(90deg,#F2CEAA,#FFC78C); }
.arch-brief-card:nth-child(2)::before { background:linear-gradient(90deg,#EF9A59,#FF933F); }
.arch-brief-card:nth-child(3)::before { background:linear-gradient(90deg,#F8812D,#FF7F26); }
.arch-brief-card:nth-child(4)::before { background:linear-gradient(90deg,#F76C07,#E37224); }
.arch-brief-card:hover { box-shadow:var(--shadow-lg); transform:translateY(-4px); }
.arch-brief-card .layer-tag {
  display:inline-flex; align-items:center; justify-content:center;
  width:36px; height:36px; border-radius:var(--radius-sm);
  font-size:13px; font-weight:700; color:#fff; margin-bottom:14px;
}
.arch-brief-card:nth-child(1) .layer-tag { background:linear-gradient(0deg,#FECC9B,#E37224); }
.arch-brief-card:nth-child(2) .layer-tag { background:linear-gradient(90deg,#FECC9B,#E37224); }
.arch-brief-card:nth-child(3) .layer-tag { background:linear-gradient(180deg,#FECC9B,#E37224); }
.arch-brief-card:nth-child(4) .layer-tag { background:linear-gradient(270deg,#FECC9B,#E37224); }
.arch-brief-card h3 { font-size:16px; font-weight:600; margin-bottom:8px; }
.arch-brief-card p { font-size:13px; color:var(--text-secondary); line-height:1.6; }

/* ========== Product Value ========== */
.value-section { padding: 80px 0;padding: 5vmax 0; background:var(--gray-light); }
.value-grid {
  display:grid; grid-template-columns:repeat(3,1fr); gap:24px;
}
.value-card {
  background:var(--white); border:1px solid var(--border-card);
  border-radius:var(--radius-lg); padding:32px 28px;
  transition:var(--transition); position:relative; overflow:hidden;
}
.value-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:3px;
  background:linear-gradient(90deg,var(--orange),#FF8C42);
  transform:scaleX(0); transition:transform .3s ease; transform-origin:left;
}
.value-card:hover::before { transform:scaleX(1); }
.value-card:hover { border-color:rgba(240,106,44,.3); box-shadow:var(--shadow-lg); transform:translateY(-4px); }
.value-card .card-emoji { font-size:28px; margin-bottom:18px; color:var(--orange); }
.value-card .card-emoji i { font-size:inherit; }
.value-card h3 { font-size:18px; font-weight:600; margin-bottom:12px; }
.value-card p { font-size:14px; color:var(--text-secondary); line-height:1.7; }

/* ========== Architecture Diagram ========== */
.arch-section {
  padding: 80px 0;padding: 5vmax 0;
  background:linear-gradient(160deg,#18191C 0%,#1E2A3A 50%,#18191C 100%);
  color:#fff; position:relative; overflow:hidden;
}
.arch-section::before {
  content:''; position:absolute; top:0; left:0; right:0; bottom:0;
  background:radial-gradient(ellipse at 20% 50%,rgba(240,106,44,.08) 0%,transparent 50%),
              radial-gradient(ellipse at 80% 50%,rgba(26,86,168,.06) 0%,transparent 50%);
}
.arch-section .container { position:relative; z-index:1; }

/* Architecture layout: left (L1+L2+L4) + right (L3) */
.arch-container {
  display:flex; flex-direction:row; gap:12px;
  align-items:stretch; width:100%;
}
.arch-left {
  flex:1; display:flex; flex-direction:column; gap:10px;
}
.arch-right {
  width:225px; display:flex; flex-direction:column;
}

/* Layer panel base */
.layer-panel {
  background:rgba(255,255,255,.05);
  border:2px solid var(--orange);
  border-radius:10px;
  padding:12px 14px; position:relative;
  transition:var(--transition);
}
.layer-panel:hover {
  background:rgba(255,255,255,.08);
  border-color:rgba(240,106,44,.6);
}
.layer-title {
  font-size:22px; font-weight:700; color:var(--orange);
  margin:5px 0 15px 0; display:flex; align-items:center; gap:8px;
}
.layer-title .num { color:var(--orange); }

/* L1 */
.l1-row {
  display:flex; flex-direction:row; gap:8px; flex-wrap:wrap;
}
.l1-item {
  flex:1; min-width:110px;
  border:2px solid var(--orange);
  border-radius:8px; padding:8px 6px;
  text-align:center; font-size:12px; font-weight:500;
  color:#fff; background:rgba(255,106,0,.06);
  line-height:1.35;
}

/* L2 */
.l2-content {
  display:flex; flex-direction:row; gap:10px; align-items:stretch;
}
.l2-block {
  display:flex; flex-direction:row; gap:8px; align-items:stretch;
}
.l2-block:first-child { flex:3; }
.l2-block:last-child { flex:2; }
.l2-block + .l2-block {
  border-left:2px dashed rgba(255,154,77,.4);
  padding-left:10px;
}
.l2-engine {
  background:linear-gradient(135deg,#ff8c33,#ff6a00);
  color:#fff; border-radius:8px;
  padding:12px 10px; min-width:110px;
  text-align:center; display:flex;
  flex-direction:column; justify-content:center;
  align-items:center; height:auto; flex-shrink:0;
}
.l2-engine .engine-title { font-size:14px; font-weight:700; line-height:1.35; }
.l2-engine .engine-sub { font-size:11px; margin-top:4px; opacity:.95; }
.l2-grid {
  display:grid; gap:6px; flex:1;
}
.l2-block:first-child .l2-grid {
  grid-template-columns:repeat(3,1fr);
  grid-template-rows:repeat(2,1fr);
}
.l2-block:last-child .l2-grid {
  grid-template-columns:repeat(2,1fr);
  grid-template-rows:repeat(2,1fr);
}
.l2-cell {
  border:2px solid var(--orange);
  border-radius:6px; padding:8px 6px;
  text-align:center; font-size:12px; font-weight:500;
  color:#fff; background:rgba(255,106,0,.06);
  display:flex; flex-direction:column;
  justify-content:center; align-items:center;
  line-height:1.35;
}

/* L3 (right side) */
.l3-panel {
  border:2px solid var(--orange);
  border-radius:10px;
  padding:12px 10px;
  background:rgba(255,255,255,.05);
  display:flex; flex-direction:column; gap:8px;
  flex:1;
}
.l3-title {
  font-size:22px; font-weight:700; color:var(--orange);
  text-align:center; margin:5px 0 9px 0; flex-shrink:0;
}
.l3-item {
  flex:1; display:flex; flex-direction:column;
  justify-content:center; align-items:center; gap:4px;
  border:2px solid var(--orange);
  border-radius:8px; padding:8px 6px;
  text-align:center; background:rgba(255,106,0,.06);
}
.l3-icon { font-size:22px; color:var(--orange); line-height:1; }
.l3-text { font-size:12px; font-weight:500; line-height:1.35; color:#fff; }

/* L4 */
.l4-content {
  display:flex; flex-direction:column; gap:10px;
}
.l4-section {
  display:flex; flex-direction:row; align-items:stretch; gap:10px;
}
.l4-label {
  width:40px; font-size:13px; font-weight:700; color:#fff;
  display:flex; align-items:center; justify-content:center;
  text-align:center; padding:6px; line-height:1.35;
}
.l4-right {
  flex:1; display:flex; flex-direction:column; gap:8px;
}
.l4-tag-row {
  display:flex; flex-direction:row; gap:8px; flex-wrap:wrap;
  border:2px dashed rgba(255,154,77,.4);
  border-radius:8px; padding:8px;
}
.l4-tag {
  flex:1; min-width:110px;
  border:2px solid var(--orange);
  border-radius:6px; padding:8px 6px;
  text-align:center; font-size:12px; font-weight:500;
  color:#fff; background:rgba(255,106,0,.06);
  line-height:1.35;
}
.l4-pool-row {
  display:flex; flex-direction:row; gap:10px;
}
.l4-pool {
  flex:1; border:2px solid var(--orange);
  border-radius:8px; background:rgba(255,106,0,.03);
  overflow:hidden; display:flex; flex-direction:column;
}
.l4-pool:nth-child(1) { flex:3; }
.l4-pool:nth-child(2) { flex:4; }
.l4-pool:nth-child(3) { flex:2; }
.l4-pool-header {
  background:linear-gradient(135deg,#ff8c33,#ff6a00);
  color:#fff; padding:8px; text-align:center;
  font-size:13px; font-weight:700;
}
.l4-pool-body {
  padding:10px 8px; display:flex; flex-direction:column;
  gap:8px; min-height:auto; justify-content:center; align-items:center; height:100%;
}
.l4-resource-row {
  display:flex; flex-direction:row; gap:10px;
  flex-wrap:wrap; justify-content:center; align-items:center;
}
.l4-resource {
  display:flex; flex-direction:row; align-items:center;
  gap:4px; font-size:12px; color:#fff; font-weight:500;
}
.l4-resource i { font-size:16px; color:var(--orange); }
.l4-subdevices {
  display:flex; flex-direction:row; gap:8px;
  flex-wrap:wrap; justify-content:center;
}
.l4-subdevice {
  display:flex; flex-direction:column; align-items:center;
  gap:2px; font-size:11px; color:#fff; font-weight:500;
  min-width:60px;
}
.l4-subdevice .d-icon { font-size:22px; color:var(--orange); line-height:1; }
.l4-divider {
  border:none; border-top:2px dashed rgba(255,154,77,.4);
  margin:2px 0;
}


/* ========== Core Features ========== */
.features-section { padding: 80px 0;padding: 5vmax 0; background:var(--gray-light); }
.features-grid {
  display:grid; grid-template-columns:repeat(3,1fr); gap:24px;
}
.feature-card {
  background:var(--white); border:1px solid var(--border-card);
  border-radius:var(--radius-lg); padding:28px 24px;
  transition:var(--transition); position:relative;
}
.feature-card:hover {
  box-shadow:var(--shadow-lg); transform:translateY(-4px);
  border-color:rgba(240,106,44,.2);
}
.feature-card .feature-num {
  position:absolute; top:16px; right:20px;
  font-size:40px; font-weight:900; color:rgba(0,0,0,.04);
  line-height:1;
}
.feature-card .feature-emoji { font-size:24px; margin-bottom:14px; color:var(--orange); }
.feature-card .feature-emoji i { background:url('https://www.os-easy.com/skin/icon/aipaas-features.png') no-repeat;background-size:32px auto;display:block;width:32px;height:32px;}
.feature-card:nth-child(2) .feature-emoji i{background-size:32px auto;background-position: 0 -36px;} 
.feature-card:nth-child(3) .feature-emoji i{background-size:32px auto;background-position: 0 -72px;}
.feature-card:nth-child(4) .feature-emoji i{background-size:32px auto;background-position: 0 -108px;}
.feature-card:nth-child(5) .feature-emoji i{background-size:32px auto;background-position: 0 -144px;}
.feature-card:nth-child(6) .feature-emoji i{background-size:32px auto;background-position: 0 -180px;}
.feature-card:nth-child(7) .feature-emoji i{background-size:32px auto;background-position: 0 -216px;}
.feature-card:nth-child(8) .feature-emoji i{background-size:32px auto;background-position: 0 -252px;}
.feature-card:nth-child(9) .feature-emoji i{background-size:32px auto;background-position: 0 -285px;}
.feature-card h3 { font-size:16px; font-weight:600; margin-bottom:10px; }
.feature-card p { font-size:13px; color:var(--text-secondary); line-height:1.7; }

/* ========== Use Cases ========== */
.cases-section { padding: 80px 0;padding: 5vmax 0; background:var(--white); }
.cases-grid {
  display:grid; grid-template-columns:repeat(2,1fr); gap:28px;
}
.case-card {
  display:flex; align-items:stretch;
  background:var(--white); border:1px solid var(--border-card);
  border-radius:var(--radius-xl); overflow:hidden;
  transition:var(--transition); position:relative;
  padding: 0 30px;
  gap: 30px;
}
.case-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:3px;
  background:linear-gradient(90deg,var(--orange),#FF8C42);
  transform:scaleX(0); transition:transform .3s ease; transform-origin:left;
  z-index:2;
}
.case-card:hover::before { transform:scaleX(1); }
.case-card:hover { box-shadow:var(--shadow-lg); transform:translateY(-4px); border-color:rgba(240,106,44,.2); }
.case-card .case-img {
  flex:2; min-width:0;
  display:flex; align-items:center; justify-content:center; overflow:hidden;
}
.case-card .case-img img {
  max-width:100%; max-height:100%; object-fit:cover; display:block;
}
.case-card .case-body {
  flex:3; min-width:0;
  padding:36px 0;
  display:flex; flex-direction:column; justify-content:center;
}
.case-card h3 { font-size:20px; font-weight:700; margin-bottom:14px; }
.case-card .case-desc {
  font-size:14px; color:var(--text-secondary); line-height:1.85; margin-bottom:18px;
}
.case-card .case-tags { display:flex; gap:8px; flex-wrap:wrap; }
.case-card .case-tag {
  font-size:12px; font-weight:600;
  background:var(--orange-light); color:var(--orange);
  padding:5px 14px; border-radius:6px;
}

/* ========== CTA Section ========== */
.cta-section {
  padding: 80px 0;padding: 5vmax 0;
  background:linear-gradient(160deg,#18191C 0%,#1E2A3A 50%,#18191C 100%);
  color:#fff; text-align:center; position:relative; overflow:hidden;
}
.cta-section::before {
  content:''; position:absolute; top:-150px; left:50%; transform:translateX(-50%);
  width:600px; height:600px; border-radius:50%;
  background:radial-gradient(circle,rgba(240,106,44,.12) 0%,transparent 70%);
  pointer-events:none;
}
.cta-section .container { position:relative; z-index:1; }
.cta-section h2 {
  font-size:36px; font-weight:700; margin-bottom:16px;
}
.cta-section p {
  font-size:18px; color:rgba(255,255,255,.6); max-width:560px;
  margin:0 auto 36px; line-height:1.7;
}
.cta-btns { display:flex; gap:20px; justify-content:center; flex-wrap:wrap; }


/* ========== Responsive ========== */
@media(max-width:1024px) {
  .stats-grid { grid-template-columns:repeat(2,1fr); gap:24px; }
  .arch-brief-grid { grid-template-columns:repeat(2,1fr); }
  .value-grid { grid-template-columns:repeat(2,1fr); }
  .features-grid { grid-template-columns:repeat(2,1fr); }
  .cases-grid { grid-template-columns:1fr; }
  .case-card { flex-direction:column; }
  .case-card .case-img { min-height:200px; }
  .hero h1 { font-size:40px; }
  .arch-container { flex-direction:column; }
  .arch-right { width:100%; }
  .l3-panel { flex-direction:row; flex-wrap:wrap; }
  .l3-item { flex:1; min-width:160px; }
  .l3-title { width:100%; }
}
@media(max-width:768px) {
  .hero{background-position: top;}
  .hero h1 { font-size:32px; }
  .hero p.subtitle { font-size:18px; margin-bottom: 40px}
  .stats-grid { grid-template-columns:repeat(2,1fr); }
  .stat-item .num { font-size:36px; }
  .arch-brief-grid { grid-template-columns:1fr; }
  .value-grid { grid-template-columns:1fr; }
  .features-grid { grid-template-columns:1fr; }
  .cases-grid { grid-template-columns:1fr; }
  .case-card .case-body { padding:24px 20px; }
  .cta-btns { flex-direction:column; align-items:center; }
  .cta-btns .btn-primary,.cta-btns .btn-secondary { width:100%; max-width:280px; justify-content:center; }
  .hero-btns { flex-direction:column; gap:12px; }
  .hero-btns .btn-primary,.hero-btns .btn-secondary { width:100%; justify-content:center; }
  .section-header h2 { font-size:28px; }
  .l2-content,.l4-section { flex-direction:column; }
  .l4-label { width:100%; }
  .l4-pool-row { flex-direction:column; }
  .l2-block + .l2-block { border-left:none; border-top:2px dashed rgba(255,154,77,.4); padding-left:0; padding-top:14px; }
  .l2-block:first-child .l2-grid,
  .l2-block:last-child .l2-grid { grid-template-columns:repeat(2,1fr); }
}
@media(max-width:480px) {
  .hero h1 { font-size:28px; }
  .stats-grid { grid-template-columns:1fr; }
  .l1-item { min-width:100%; }
  .l4-tag { min-width:100%; }
  .case-card{padding:0 }
}