/* ============================================================
   Kunming Liluo Kenan Information Technology Co., Ltd.
   Dark Theme Stylesheet
   ============================================================ */

:root {
  --bg-primary: #0a0808;
  --bg-secondary: #120e10;
  --bg-card: #1c1618;
  --bg-hover: #282024;
  --text-primary: #eee8e8;
  --text-secondary: #b0a0a0;
  --text-muted: #786868;
  --accent-1: #f97316;
  --accent-2: #e11d48;
  --accent-3: #facc15;
  --accent-gradient: linear-gradient(135deg, #f97316, #e11d48);
  --accent-gradient-2: linear-gradient(135deg, #facc15, #f97316);
  --border-color: #2e2222;
  --border-light: #3e3030;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(249, 115, 22, 0.15);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --font-sans: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --max-width: 1200px;
  --header-height: 72px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; font-size:16px; }
body {
  font-family:var(--font-sans); background:var(--bg-primary);
  color:var(--text-primary); line-height:1.7; overflow-x:hidden;
}
::-webkit-scrollbar { width:8px; }
::-webkit-scrollbar-track { background:var(--bg-primary); }
::-webkit-scrollbar-thumb { background:var(--border-light); border-radius:4px; }
::-webkit-scrollbar-thumb:hover { background:var(--text-muted); }

.lang-en, .lang-zh { display:inline; }
body.lang-active-zh .lang-en { display:none; }
body.lang-active-zh .lang-zh { display:inline; }
body:not(.lang-active-zh) .lang-zh { display:none; }

h1,h2,h3,h4,h5,h6 { font-weight:700; line-height:1.3; }
h1 { font-size:clamp(2rem,5vw,3.5rem); }
h2 { font-size:clamp(1.5rem,3.5vw,2.5rem); }
h3 { font-size:clamp(1.2rem,2.5vw,1.75rem); }
h4 { font-size:1.25rem; }
p { margin-bottom:1rem; }
a { color:var(--accent-1); text-decoration:none; transition:color var(--transition); }
a:hover { color:#fb923c; }
img { max-width:100%; height:auto; }

.container { width:100%; max-width:var(--max-width); margin:0 auto; padding:0 24px; }
.section { padding:100px 0; }
.section-dark { background:var(--bg-secondary); }
.section-label {
  display:inline-block; font-size:0.85rem; font-weight:600;
  text-transform:uppercase; letter-spacing:3px;
  color:var(--accent-2); margin-bottom:12px;
}
.section-title { margin-bottom:16px; }
.section-subtitle { font-size:1.1rem; color:var(--text-secondary); max-width:600px; }

.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 32px; font-size:1rem; font-weight:600;
  font-family:var(--font-sans); border:none;
  border-radius:var(--radius-sm); cursor:pointer;
  transition:all var(--transition); text-decoration:none;
}
.btn-primary { background:var(--accent-gradient); color:#fff; }
.btn-primary:hover { transform:translateY(-2px); box-shadow:var(--shadow-glow); color:#fff; }
.btn-outline {
  background:transparent; border:2px solid var(--border-light); color:var(--text-primary);
}
.btn-outline:hover { border-color:var(--accent-1); color:var(--accent-1); transform:translateY(-2px); }
.btn-sm { padding:10px 20px; font-size:0.9rem; }

.lang-toggle {
  position:fixed; top:20px; right:20px; z-index:1001;
  display:flex; align-items:center; gap:6px;
  padding:8px 16px; background:var(--bg-card); border:1px solid var(--border-color);
  border-radius:50px; cursor:pointer; font-family:var(--font-sans);
  font-size:0.85rem; font-weight:600; color:var(--text-primary);
  transition:all var(--transition); box-shadow:var(--shadow-sm); backdrop-filter:blur(12px);
}
.lang-toggle:hover { border-color:var(--accent-1); box-shadow:var(--shadow-glow); }
.lang-toggle .indicator {
  width:28px; height:28px; border-radius:50%;
  background:var(--accent-gradient); display:flex; align-items:center; justify-content:center;
  font-size:0.75rem; color:#fff; transition:var(--transition);
}

.header {
  position:fixed; top:0; left:0; width:100%; height:var(--header-height);
  z-index:1000; background:rgba(10,8,8,0.85); backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px); border-bottom:1px solid var(--border-color);
  transition:all var(--transition);
}
.header.scrolled { background:rgba(10,8,8,0.95); box-shadow:0 4px 20px rgba(0,0,0,0.5); }
.header-inner { display:flex; align-items:center; justify-content:space-between; height:100%; }
.logo {
  display:flex; align-items:center; gap:10px;
  font-size:1.2rem; font-weight:700; color:var(--text-primary); text-decoration:none;
}
.logo-icon {
  width:36px; height:36px; background:var(--accent-gradient);
  border-radius:10px; display:flex; align-items:center; justify-content:center;
  font-weight:800; font-size:0.9rem; color:#fff;
}
.nav-links { display:flex; align-items:center; gap:32px; list-style:none; }
.nav-links a {
  color:var(--text-secondary); font-size:0.9rem; font-weight:500;
  transition:color var(--transition); position:relative;
}
.nav-links a::after {
  content:''; position:absolute; bottom:-4px; left:0;
  width:0; height:2px; background:var(--accent-gradient); transition:width var(--transition);
}
.nav-links a:hover, .nav-links a.active { color:var(--text-primary); }
.nav-links a:hover::after, .nav-links a.active::after { width:100%; }
.mobile-menu-btn { display:none; flex-direction:column; gap:5px; cursor:pointer; background:none; border:none; padding:4px; }
.mobile-menu-btn span { width:24px; height:2px; background:var(--text-primary); border-radius:2px; transition:var(--transition); }

.hero {
  min-height:100vh; display:flex; align-items:center;
  position:relative; overflow:hidden; padding-top:var(--header-height);
}
.hero-bg { position:absolute; inset:0; z-index:0; }
.hero-bg .grid {
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(249,115,22,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(249,115,22,0.03) 1px, transparent 1px);
  background-size:60px 60px;
}
.hero-bg .glow-1 {
  position:absolute; top:-20%; right:-10%; width:600px; height:600px;
  background:radial-gradient(circle,rgba(249,115,22,0.08),transparent 70%);
  border-radius:50%; animation:float-slow 8s ease-in-out infinite alternate;
}
.hero-bg .glow-2 {
  position:absolute; bottom:-30%; left:-10%; width:500px; height:500px;
  background:radial-gradient(circle,rgba(225,29,72,0.06),transparent 70%);
  border-radius:50%; animation:float-slow 10s ease-in-out infinite alternate-reverse;
}
@keyframes float-slow {
  0% { transform:translate(0,0) scale(1); }
  100% { transform:translate(30px,-30px) scale(1.1); }
}
.hero-content { position:relative; z-index:1; max-width:800px; }
.hero-badge {
  display:inline-flex; align-items:center; gap:8px;
  padding:8px 16px; background:rgba(249,115,22,0.1);
  border:1px solid rgba(249,115,22,0.2); border-radius:50px;
  font-size:0.85rem; color:var(--accent-1); margin-bottom:24px;
}
.hero h1 { margin-bottom:24px; }
.hero h1 .highlight {
  background:var(--accent-gradient); -webkit-background-clip:text;
  -webkit-text-fill-color:transparent; background-clip:text;
}
.hero p { font-size:1.15rem; color:var(--text-secondary); margin-bottom:40px; max-width:600px; }
.hero-actions { display:flex; gap:16px; flex-wrap:wrap; }

.services-grid {
  display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:24px; margin-top:48px;
}
.service-card {
  background:var(--bg-card); border:1px solid var(--border-color);
  border-radius:var(--radius-md); padding:36px 28px;
  transition:all var(--transition); position:relative; overflow:hidden;
}
.service-card::before {
  content:''; position:absolute; top:0; left:0; width:100%; height:3px;
  background:var(--accent-gradient); transform:scaleX(0);
  transform-origin:left; transition:transform var(--transition);
}
.service-card:hover { border-color:var(--border-light); transform:translateY(-4px); box-shadow:var(--shadow-md); }
.service-card:hover::before { transform:scaleX(1); }
.service-icon {
  width:52px; height:52px; background:rgba(249,115,22,0.1);
  border-radius:12px; display:flex; align-items:center; justify-content:center;
  font-size:1.5rem; margin-bottom:20px;
}
.service-card h3 { margin-bottom:12px; }
.service-card p { color:var(--text-secondary); font-size:0.95rem; margin-bottom:0; }

.about-grid { display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; margin-top:48px; }
.about-visual .code-block {
  background:var(--bg-card); border:1px solid var(--border-color);
  border-radius:var(--radius-md); padding:28px; font-family:var(--font-mono);
  font-size:0.85rem; line-height:1.8; color:var(--text-secondary); overflow-x:auto;
}
.code-block .keyword { color:#f97316; }
.code-block .string { color:#e11d48; }
.code-block .comment { color:var(--text-muted); font-style:italic; }
.code-block .function { color:#facc15; }

.stats-row { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-top:32px; }
.stat-item {
  text-align:center; padding:20px 12px; background:var(--bg-card);
  border-radius:var(--radius-sm); border:1px solid var(--border-color);
}
.stat-number {
  font-size:2rem; font-weight:800; background:var(--accent-gradient);
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.stat-label { font-size:0.85rem; color:var(--text-secondary); margin-top:4px; }

.features-grid {
  display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:20px; margin-top:48px;
}
.feature-item {
  display:flex; gap:16px; padding:24px; background:var(--bg-card);
  border-radius:var(--radius-sm); border:1px solid var(--border-color); transition:all var(--transition);
}
.feature-item:hover { border-color:var(--border-light); transform:translateY(-2px); }
.feature-check {
  width:28px; height:28px; min-width:28px; background:rgba(250,204,21,0.15);
  border-radius:50%; display:flex; align-items:center; justify-content:center;
  color:var(--accent-3); font-weight:bold;
}
.feature-item h4 { font-size:1.05rem; margin-bottom:6px; }
.feature-item p { font-size:0.9rem; color:var(--text-secondary); margin-bottom:0; }

.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:48px; margin-top:48px; }
.contact-info-list { display:flex; flex-direction:column; gap:24px; }
.contact-item { display:flex; gap:16px; align-items:flex-start; }
.contact-item-icon {
  width:44px; height:44px; min-width:44px; background:rgba(249,115,22,0.1);
  border-radius:10px; display:flex; align-items:center; justify-content:center; font-size:1.2rem;
}
.contact-item h4 { font-size:1rem; margin-bottom:4px; }
.contact-item p { font-size:0.95rem; color:var(--text-secondary); margin-bottom:0; }
.contact-item a { color:var(--text-secondary); }
.contact-item a:hover { color:var(--accent-1); }
.contact-form {
  background:var(--bg-card); border:1px solid var(--border-color);
  border-radius:var(--radius-md); padding:32px;
}
.form-group { margin-bottom:20px; }
.form-group label { display:block; font-size:0.9rem; font-weight:600; margin-bottom:8px; color:var(--text-secondary); }
.form-group input, .form-group textarea, .form-group select {
  width:100%; padding:14px 16px; background:var(--bg-primary);
  border:1px solid var(--border-color); border-radius:var(--radius-sm);
  color:var(--text-primary); font-family:var(--font-sans); font-size:0.95rem;
  transition:border-color var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline:none; border-color:var(--accent-1); box-shadow:0 0 0 3px rgba(249,115,22,0.1);
}
.form-group textarea { resize:vertical; min-height:120px; }

.team-grid {
  display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:24px; margin-top:48px;
}
.team-card {
  background:var(--bg-card); border:1px solid var(--border-color);
  border-radius:var(--radius-md); padding:36px 24px; text-align:center;
  transition:all var(--transition);
}
.team-card:hover { border-color:var(--border-light); transform:translateY(-4px); }
.team-avatar {
  width:80px; height:80px; margin:0 auto 16px; background:var(--accent-gradient);
  border-radius:50%; display:flex; align-items:center; justify-content:center;
  font-size:2rem; color:#fff;
}
.team-card h4 { margin-bottom:4px; }
.team-role { color:var(--accent-2); font-size:0.85rem; font-weight:500; }

.policy-page { padding-top:calc(var(--header-height)+60px); padding-bottom:80px; }
.policy-page h1 { margin-bottom:8px; }
.policy-date { color:var(--text-muted); font-size:0.9rem; margin-bottom:40px; }
.policy-content h2 {
  font-size:1.5rem; margin-top:40px; margin-bottom:16px;
  padding-bottom:8px; border-bottom:1px solid var(--border-color);
}
.policy-content h3 { font-size:1.2rem; margin-top:28px; margin-bottom:12px; }
.policy-content p { margin-bottom:16px; color:var(--text-secondary); }
.policy-content ul, .policy-content ol { margin:16px 0; padding-left:24px; color:var(--text-secondary); }
.policy-content li { margin-bottom:8px; }
.policy-content strong { color:var(--text-primary); }

.page-header { padding-top:calc(var(--header-height)+60px); padding-bottom:60px; text-align:center; position:relative; }
.page-header .bg-glow {
  position:absolute; top:-50%; left:50%; transform:translateX(-50%);
  width:500px; height:500px; background:radial-gradient(circle,rgba(249,115,22,0.05),transparent 70%);
  pointer-events:none;
}
.page-header h1 { position:relative; z-index:1; }
.page-header p { position:relative; z-index:1; color:var(--text-secondary); max-width:600px; margin:16px auto 0; }

.footer { background:var(--bg-secondary); border-top:1px solid var(--border-color); padding:64px 0 32px; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; }
.footer-brand p { font-size:0.9rem; color:var(--text-muted); margin-top:16px; }
.footer h4 { font-size:1rem; margin-bottom:20px; }
.footer-links { list-style:none; }
.footer-links li { margin-bottom:10px; }
.footer-links a { font-size:0.9rem; color:var(--text-muted); transition:color var(--transition); }
.footer-links a:hover { color:var(--accent-1); }
.footer-bottom {
  margin-top:48px; padding-top:24px; border-top:1px solid var(--border-color);
  display:flex; justify-content:space-between; align-items:center;
  font-size:0.85rem; color:var(--text-muted); flex-wrap:wrap; gap:12px;
}

body.page-home .header { background:transparent; border-bottom-color:transparent; }
body.page-home .header.scrolled { background:rgba(10,8,8,0.95); border-bottom-color:var(--border-color); }

.fade-in { opacity:0; transform:translateY(30px); transition:opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity:1; transform:translateY(0); }

.cta-section {
  text-align:center; padding:100px 0; background:var(--bg-secondary);
  position:relative; overflow:hidden;
}
.cta-section .glow {
  position:absolute; top:50%; left:50%; transform:translate(-50%,-50%);
  width:600px; height:600px;
  background:radial-gradient(circle,rgba(249,115,22,0.06),transparent 70%);
  pointer-events:none;
}
.cta-section h2 { margin-bottom:16px; position:relative; z-index:1; }
.cta-section p { color:var(--text-secondary); max-width:500px; margin:0 auto 32px; position:relative; z-index:1; }
.cta-section .btn { position:relative; z-index:1; }

@media (max-width:968px) {
  .about-grid { grid-template-columns:1fr; gap:40px; }
  .contact-grid { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr 1fr; }
}
@media (max-width:768px) {
  .nav-links {
    position:fixed; top:0; right:-100%; width:280px; height:100vh;
    background:var(--bg-secondary); flex-direction:column; padding:100px 32px;
    gap:24px; transition:right var(--transition); border-left:1px solid var(--border-color); z-index:999;
  }
  .nav-links.open { right:0; }
  .mobile-menu-btn { display:flex; }
  .lang-toggle { top:12px; right:12px; padding:6px 12px; font-size:0.8rem; }
  .hero h1 { font-size:clamp(1.6rem,6vw,2.5rem); }
  .stats-row { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; }
  .footer-bottom { flex-direction:column; text-align:center; }
  .services-grid { grid-template-columns:1fr; }
  .features-grid { grid-template-columns:1fr; }
}