:root,
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-input: #f1f5f9;
  --bg-hover: rgba(241,245,249,0.8);
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --accent: #2563eb;
  --accent-bg: #dbeafe;
  --accent-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.06), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --radius: 10px;
  --radius-sm: 6px;
  --font: -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --mono: 'SFMono-Regular',Consolas,'Liberation Mono',Menlo,monospace;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --bg-input: #334155;
  --bg-hover: rgba(51,65,85,0.8);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: #334155;
  --accent: #60a5fa;
  --accent-bg: #1e3a5f;
  --accent-hover: #93bbfd;
  --danger: #f87171;
  --danger-bg: #3b1a1a;
  --success: #4ade80;
  --success-bg: #1a3b1a;
  --warning: #fbbf24;
  --warning-bg: #3b2f1a;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.3), 0 2px 4px -2px rgba(0,0,0,0.25);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.35), 0 4px 6px -4px rgba(0,0,0,0.2);
}

* { margin:0; padding:0; box-sizing:border-box }
html { height:100% }
body {
  font-family:var(--font);
  background:var(--bg-primary);
  color:var(--text-primary);
  min-height:100%;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  display:flex;
  flex-direction:column;
}

nav {
  background:var(--bg-secondary);
  border-bottom:1px solid var(--border-color);
  height:52px;
  display:flex;
  align-items:center;
  padding:0 24px;
  position:sticky;
  top:0;
  z-index:100;
  gap:4px;
}
nav .brand {
  font-size:16px;
  font-weight:700;
  color:var(--accent);
  margin-right:24px;
  text-decoration:none;
  white-space:nowrap;
  display:flex;
  align-items:center;
  gap:8px;
}
nav .brand svg { width:20px; height:20px }
nav a {
  padding:14px 16px;
  color:var(--text-secondary);
  text-decoration:none;
  font-size:13px;
  font-weight:500;
  border-bottom:2px solid transparent;
  transition:all .12s;
}
nav a:hover { color:var(--text-primary) }
nav a.active { color:var(--accent); border-bottom-color:var(--accent) }
nav .spacer { margin-left:auto }
nav .nav-btn {
  background:none;
  border:1px solid var(--border-color);
  color:var(--text-secondary);
  cursor:pointer;
  padding:6px 12px;
  border-radius:var(--radius-sm);
  font-size:13px;
  transition:all .15s;
  text-decoration:none;
  display:flex;
  align-items:center;
  gap:6px;
}
nav .nav-btn:hover { color:var(--accent); border-color:var(--accent) }

.container { padding:32px 24px; max-width:1200px; margin:0 auto; flex:1; width:100% }

.card {
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius);
  padding:20px;
  transition:box-shadow .2s,border-color .2s;
  box-shadow:var(--shadow-sm);
}

.btn {
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 16px;
  border-radius:var(--radius-sm);
  border:none;
  font-size:13px;
  font-weight:500;
  cursor:pointer;
  text-decoration:none;
  transition:all .15s;
  font-family:var(--font);
  line-height:1.4;
}
.btn:active { transform:scale(.97) }
.btn-primary { background:var(--accent); color:#fff }
.btn-primary:hover { background:var(--accent-hover) }
.btn-ghost {
  background:transparent;
  border:1px solid var(--border-color);
  color:var(--text-secondary);
}
.btn-ghost:hover { background:var(--bg-hover); color:var(--text-primary) }
.btn-sm { padding:5px 10px; font-size:12px }
.btn-lg { padding:10px 24px; font-size:15px }

input,textarea,select {
  background:var(--bg-input);
  border:1px solid var(--border-color);
  border-radius:var(--radius-sm);
  padding:10px 14px;
  color:var(--text-primary);
  font-size:14px;
  width:100%;
  outline:none;
  transition:border-color .15s,box-shadow .15s;
  font-family:var(--font);
}
input:focus,textarea:focus,select:focus {
  border-color:var(--accent);
  box-shadow:0 0 0 3px var(--accent-bg);
}

label {
  display:block;
  font-size:13px;
  font-weight:500;
  color:var(--text-secondary);
  margin-bottom:4px;
}

.grid-2 { display:grid; grid-template-columns:1fr 1fr; gap:16px }
.grid-3 { display:grid; grid-template-columns:1fr 1fr 1fr; gap:16px }
.grid-4 { display:grid; grid-template-columns:repeat(4,1fr); gap:16px }

.badge {
  display:inline-flex;
  align-items:center;
  gap:4px;
  padding:2px 8px;
  border-radius:4px;
  font-size:11px;
  font-weight:500;
}
.badge-blue { background:var(--accent-bg); color:var(--accent) }
.badge-green { background:var(--success-bg); color:var(--success) }
.badge-red { background:var(--danger-bg); color:var(--danger) }
.badge-warning { background:var(--warning-bg); color:var(--warning) }

.error { color:var(--danger); font-size:13px; text-align:center; margin-bottom:12px }
.success { color:var(--success); font-size:13px; text-align:center; margin-bottom:12px }

.footer {
  text-align:center;
  padding:20px;
  color:var(--text-muted);
  font-size:12px;
  border-top:1px solid var(--border-color);
  background:var(--bg-secondary);
  margin-top:auto;
}

.theme-btn {
  background:none;
  border:1px solid var(--border-color);
  color:var(--text-secondary);
  cursor:pointer;
  padding:6px 10px;
  border-radius:var(--radius-sm);
  font-size:13px;
  display:flex;
  align-items:center;
  gap:6px;
  transition:all .15s;
}
.theme-btn:hover { color:var(--accent); border-color:var(--accent) }
.theme-btn svg { width:16px; height:16px }
.footer a { color:var(--text-muted); text-decoration:none }
.footer a:hover { color:var(--accent) }

/* 页脚内容：左列两行备案号 / 右列两行座右铭（与主站、登录页一致）。
   分隔符保留在标记里但隐藏 —— 两列本身已经分开了。 */
.footer .navi-footer {
  display:grid; grid-template-columns:auto auto; grid-template-rows:auto auto;
  grid-auto-flow:column; gap:2px 14px; justify-content:space-between;
  align-items:center; text-align:left; max-width:1100px; margin:0 auto;
}
.footer .navi-footer-sep { display:none }
.footer .navi-quote { grid-column:2; justify-self:end; opacity:.85 }
@media(max-width:520px) {
  .footer .navi-footer { grid-template-columns:auto; grid-auto-flow:row; justify-content:center; text-align:center; gap:2px }
  .footer .navi-quote { grid-column:1; justify-self:center }
}

@media(max-width:768px) {
  nav { padding:0 12px; gap:2px }
  nav .brand { font-size:14px; margin-right:12px }
  nav a { padding:16px 8px; font-size:12px }
  .container { padding:16px }
  .card { padding:14px }
  .grid-2,.grid-3,.grid-4 { grid-template-columns:1fr }
}

/* ===== enhanced decorative & hero styles (added 2026-08-13) ===== */
body { position:relative }

.bg-decor {
  position:fixed;
  inset:0;
  z-index:-1;
  overflow:hidden;
  pointer-events:none;
}
.bg-decor .orb {
  position:absolute;
  border-radius:50%;
  filter:blur(90px);
  opacity:.55;
}
[data-theme="light"] .orb { opacity:.5 }
.bg-decor .orb-1 {
  width:520px;height:520px;
  top:-180px;right:-120px;
  background:radial-gradient(circle,#7c3aed,#6366f1 55%,transparent 75%);
  animation:drift 26s ease-in-out infinite alternate;
}
.bg-decor .orb-2 {
  width:460px;height:460px;
  bottom:-200px;left:-140px;
  background:radial-gradient(circle,#3b82f6,#22d3ee 55%,transparent 78%);
  animation:drift 32s ease-in-out infinite alternate-reverse;
}
[data-theme="dark"] .bg-decor .orb { opacity:.28 }
.bg-decor .grid-lines {
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(99,102,241,.06) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(99,102,241,.06) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 80% 55% at 50% 0%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 80% 55% at 50% 0%,#000 30%,transparent 75%);
}
@keyframes drift {
  from { transform:translate(0,0) scale(1) }
  to   { transform:translate(60px,40px) scale(1.12) }
}

nav {
  background:rgba(255,255,255,.72);
  backdrop-filter:blur(14px) saturate(1.5);
  -webkit-backdrop-filter:blur(14px) saturate(1.5);
  border-bottom:1px solid var(--border-color);
}
[data-theme="dark"] nav {
  background:rgba(15,23,42,.68);
  backdrop-filter:blur(14px) saturate(1.4);
  -webkit-backdrop-filter:blur(14px) saturate(1.4);
}

.hero {
  text-align:center;
  padding:76px 20px 40px;
}
.hero-badge {
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 16px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  color:var(--accent);
  background:var(--accent-bg);
  border:1px solid transparent;
  margin-bottom:22px;
}
.hero-dot {
  width:8px;height:8px;border-radius:50%;
  background:var(--success);
  box-shadow:0 0 0 4px var(--success-bg);
}
.hero-title {
  font-size:clamp(2.4rem,5.5vw,3.6rem);
  font-weight:800;
  letter-spacing:-0.03em;
  line-height:1.12;
  color:var(--text-primary);
  margin-bottom:16px;
}
.hero-grad {
  background:linear-gradient(120deg,#3b82f6,#8b5cf6 55%,#06b6d4);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero-sub {
  color:var(--text-secondary);
  font-size:1.08rem;
  max-width:520px;
  margin:0 auto 30px;
}
.hero-actions {
  display:flex;
  gap:14px;
  justify-content:center;
  flex-wrap:wrap;
}

.services {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(300px,1fr));
  gap:18px;
  margin:0 auto 56px;
  max-width:1080px;
}
.service-card {
  position:relative;
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:16px;
  padding:22px;
  text-decoration:none;
  color:var(--text-primary);
  transition:transform .2s ease,border-color .2s ease,box-shadow .25s ease;
  box-shadow:var(--shadow-sm);
  display:flex;
  align-items:center;
  gap:16px;
  overflow:hidden;
}
.service-card::before {
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  opacity:0;
  transition:opacity .25s ease;
}
.service-card:hover {
  border-color:var(--accent);
  box-shadow:var(--shadow-lg);
  transform:translateY(-3px);
}
.service-card:hover::before { opacity:1 }
.service-card:hover .card-arrow { transform:translateX(3px); color:var(--accent) }
[data-theme="light"] .service-card { background:rgba(255,255,255,.8) }
.service-icon {
  width:48px;height:48px;
  border-radius:13px;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  color:#fff;
  transition:transform .25s ease;
}
.service-card:hover .service-icon { transform:scale(1.08) rotate(-3deg) }
.service-icon svg { width:25px; height:25px }
.icon-teal { background:linear-gradient(135deg,#10b981,#0ea5e9) }
.icon-violet { background:linear-gradient(135deg,#8b5cf6,#6366f1) }
.icon-grad { background:linear-gradient(135deg,#3b82f6,#8b5cf6) }
.service-info { min-width:0; flex:1 }
.service-name {
  font-size:15px;
  font-weight:700;
  margin-bottom:4px;
  display:flex;
  align-items:center;
  gap:8px;
}
.service-desc { font-size:12.5px; color:var(--text-muted); line-height:1.45 }
.card-arrow {
  flex-shrink:0;
  color:var(--text-muted);
  transition:transform .25s ease,color .2s;
  display:flex;
  opacity:.75;
}
.card-arrow svg { width:18px; height:18px }
.badge-violet { background:rgba(139,92,246,.14); color:#8b5cf6 }
[data-theme="dark"] .badge-violet { background:rgba(139,92,246,.18); color:#a78bfa }

@media(max-width:768px) {
  .hero { padding:52px 16px 30px }
  .services { max-width:100%; grid-template-columns:1fr }
  .hero-actions { flex-direction:column; align-items:stretch }
  .hero-actions .btn { justify-content:center }
}