/* ============================================================
   北京一诺田科技有限公司 - 主样式表
   时尚科技风：深色 + 蓝紫渐变 + 霓虹点缀
   ============================================================ */

:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-light: #6366f1;
  --accent: #06b6d4;
  --accent-dark: #0891b2;
  --bg-dark: #0f172a;
  --bg-card: #1e293b;
  --bg-body: #f8fafc;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.1);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 72px;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; scroll-padding-top:var(--header-height); }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text-primary);
  background: var(--bg-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin:0 auto; padding:0 20px; }

/* ============ Header ============ */
.header {
  position: sticky; top:0; z-index:1000;
  background: rgba(15,23,42,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  height: var(--header-height);
}
.header .container { display:flex; align-items:center; justify-content:space-between; height:100%; }
.logo { display:flex; align-items:center; gap:12px; text-decoration:none; }
.logo-icon {
  width:42px; height:42px; border-radius:10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display:flex; align-items:center; justify-content:center;
  color:#fff; font-size:1.2rem;
}
.logo-title { color:#fff; font-weight:800; font-size:1.15rem; line-height:1.2; }
.logo-sub { color:var(--text-light); font-size:0.65rem; letter-spacing:0.05em; }

.nav { display:flex; gap:4px; }
.nav-link {
  color:#94a3b8; text-decoration:none; padding:0.5rem 1rem; border-radius:8px;
  font-size:0.9rem; font-weight:500; transition:var(--transition);
}
.nav-link:hover, .nav-link.active { color:#fff; background:rgba(255,255,255,0.08); }

.menu-toggle {
  display:none; background:none; border:none; color:#fff; font-size:1.5rem;
  cursor:pointer; padding:8px;
}

/* 移动端菜单 */
.mobile-menu-overlay {
  position:fixed; top:0; left:0; right:0; bottom:0; background:rgba(0,0,0,0.6);
  z-index:1999; opacity:0; visibility:hidden; transition:opacity 0.3s;
}
.mobile-menu-overlay.open { opacity:1; visibility:visible; }
.mobile-menu {
  position:fixed; top:0; right:-300px; width:280px; height:100vh; z-index:2000;
  background:var(--bg-dark); transition:right 0.3s ease;
  display:flex; flex-direction:column; overflow-y:auto;
}
.mobile-menu.open { right:0; }
.mobile-menu-header {
  display:flex; justify-content:space-between; align-items:center;
  padding:1rem 1.5rem; border-bottom:1px solid rgba(255,255,255,0.08);
  color:#fff; font-weight:600;
}
.mobile-menu-header button { background:none; border:none; color:#fff; font-size:1.3rem; cursor:pointer; }
.mobile-nav-link {
  padding:1rem 1.5rem; color:#94a3b8; text-decoration:none; border-bottom:1px solid rgba(255,255,255,0.05);
  transition:var(--transition); font-weight:500;
}
.mobile-nav-link:hover { color:#fff; background:rgba(255,255,255,0.04); }

/* ============ Page Hero ============ */
.page-hero {
  padding: 80px 0 60px; text-align:center; color:#fff;
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
  position:relative; overflow:hidden;
}
.page-hero::before {
  content:''; position:absolute; top:-50%; right:-20%; width:500px; height:500px;
  background:radial-gradient(circle, rgba(99,102,241,0.15) 0%, transparent 70%);
  border-radius:50%;
}
.page-hero::after {
  content:''; position:absolute; bottom:-30%; left:-10%; width:400px; height:400px;
  background:radial-gradient(circle, rgba(6,182,212,0.12) 0%, transparent 70%);
  border-radius:50%;
}
.page-hero h1 { font-size:2.8rem; font-weight:900; position:relative; z-index:1; letter-spacing:-0.02em; }
.page-hero .hero-sub { font-size:1.15rem; color:#94a3b8; margin-top:12px; position:relative; z-index:1; }
.hero-bg-1 { background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%); }
.hero-bg-2 { background: linear-gradient(135deg, #1e1b4b 0%, #0f172a 50%, #1a1130 100%); }

/* ============ Breadcrumb ============ */
.breadcrumb { background:#fff; border-bottom:1px solid var(--border); padding:12px 0; }
.breadcrumb, .breadcrumb a { font-size:0.85rem; color:var(--text-secondary); text-decoration:none; }
.breadcrumb a:hover { color:var(--primary); }
.breadcrumb .current { color:var(--primary); font-weight:600; }
.breadcrumb span { margin:0 4px; color:#cbd5e1; }

/* ============ Sections ============ */
.section { padding:80px 0; }
.section-dark { background:var(--bg-dark); color:#fff; }
.section-header { text-align:center; margin-bottom:48px; }
.section-header h2 { font-size:2.2rem; font-weight:800; color:var(--text-primary); letter-spacing:-0.02em; }
.section-dark .section-header h2 { color:#fff; }
.section-header p { color:var(--text-secondary); font-size:1.05rem; margin-top:8px; max-width:600px; margin-left:auto; margin-right:auto; }
.section-divider {
  width:60px; height:4px; border-radius:2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  margin:12px auto 0;
}

/* ============ Buttons ============ */
.btn {
  display:inline-flex; align-items:center; gap:8px; padding:0.7rem 1.75rem;
  border-radius:10px; font-weight:600; font-size:0.95rem; text-decoration:none;
  transition:var(--transition); border:none; cursor:pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color:#fff; box-shadow: 0 4px 16px rgba(79,70,229,0.3);
}
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(79,70,229,0.4); }
.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color:#fff; box-shadow: 0 4px 16px rgba(6,182,212,0.3);
}
.btn-accent:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(6,182,212,0.4); }
.btn-outline {
  border:2px solid var(--primary); color:var(--primary); background:transparent;
}
.btn-outline:hover { background:var(--primary); color:#fff; }
.btn-white { background:#fff; color:var(--primary); }
.btn-white:hover { box-shadow:0 8px 24px rgba(0,0,0,0.15); transform:translateY(-2px); }

/* ============ Cards ============ */
.card {
  background:#fff; border-radius:var(--radius); border:1px solid var(--border);
  overflow:hidden; transition:var(--transition);
}
.card:hover { box-shadow:var(--shadow-lg); transform:translateY(-4px); }
.card-body { padding:1.5rem; }

.service-card {
  background:#fff; border-radius:var(--radius); padding:2rem 1.5rem;
  border:1px solid var(--border); transition:var(--transition);
  text-decoration:none; display:block;
}
.service-card:hover {
  box-shadow:var(--shadow-lg); transform:translateY(-6px);
  border-color:var(--primary);
}
.service-card .svc-icon {
  width:56px; height:56px; border-radius:14px; display:flex; align-items:center;
  justify-content:center; font-size:1.5rem; margin-bottom:1rem;
}
.service-card h3 { color:var(--text-primary); font-size:1.1rem; font-weight:700; margin-bottom:0.5rem; }
.service-card p { color:var(--text-secondary); font-size:0.9rem; line-height:1.6; }

.case-card {
  background:#fff; border-radius:var(--radius); overflow:hidden;
  border:1px solid var(--border); transition:var(--transition);
  text-decoration:none; display:block;
}
.case-card:hover { box-shadow:var(--shadow-lg); transform:translateY(-4px); }
.case-card-img {
  height:200px; background:linear-gradient(135deg, #1e293b, #334155);
  display:flex; align-items:center; justify-content:center; color:#fff; font-size:3rem;
}
.case-card-body { padding:1.5rem; }
.case-card-body h3 { color:var(--text-primary); font-weight:700; margin-bottom:8px; }
.case-card-body p { color:var(--text-secondary); font-size:0.9rem; line-height:1.6; }
.case-card-body .tag {
  display:inline-block; padding:2px 10px; border-radius:20px;
  font-size:0.75rem; font-weight:600; margin:8px 4px 0 0;
}

/* ============ Stats Grid ============ */
.stats-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.stat-item { text-align:center; padding:2rem 1rem; }
.stat-number {
  font-size:2.5rem; font-weight:900;
  background:linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
}
.stat-label { color:var(--text-secondary); font-size:0.9rem; margin-top:4px; }

/* ============ Process Steps ============ */
.process-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:32px; }
.process-step { text-align:center; position:relative; }
.process-step:not(:last-child)::after {
  content:''; position:absolute; top:28px; left:60%; width:80%; height:2px;
  background:linear-gradient(90deg, var(--primary), var(--accent));
}
.process-icon {
  width:56px; height:56px; border-radius:50%; display:flex; align-items:center;
  justify-content:center; margin:0 auto 16px; font-size:1.3rem; color:#fff;
  background:linear-gradient(135deg, var(--primary), var(--accent));
  position:relative; z-index:1;
}
.process-step h4 { font-weight:700; margin-bottom:4px; }
.process-step p { color:var(--text-secondary); font-size:0.85rem; }

/* ============ Testimonials / Partners ============ */
.partner-scroll {
  display:flex; gap:48px; animation:scrollLeft 30s linear infinite; align-items:center;
}
.partner-scroll:hover { animation-play-state:paused; }
@keyframes scrollLeft {
  0% { transform:translateX(0); }
  100% { transform:translateX(-50%); }
}
.partner-item {
  width:150px; height:60px; background:rgba(255,255,255,0.06); border-radius:10px;
  display:flex; align-items:center; justify-content:center;
  color:#94a3b8; font-size:0.9rem; font-weight:600; flex-shrink:0;
}

/* ============ Forms ============ */
.form-group { margin-bottom:1.25rem; }
.form-group label { display:block; font-weight:600; font-size:0.9rem; margin-bottom:6px; color:var(--text-primary); }
.form-input {
  width:100%; padding:0.7rem 1rem; border:1px solid var(--border); border-radius:10px;
  font-size:0.95rem; font-family:inherit; transition:var(--transition); outline:none;
}
.form-input:focus { border-color:var(--primary); box-shadow:0 0 0 3px rgba(79,70,229,0.12); }
.form-textarea {
  width:100%; padding:0.7rem 1rem; border:1px solid var(--border); border-radius:10px;
  font-size:0.95rem; font-family:inherit; resize:vertical; min-height:120px; outline:none;
}
.form-textarea:focus { border-color:var(--primary); box-shadow:0 0 0 3px rgba(79,70,229,0.12); }
.form-select {
  width:100%; padding:0.7rem 1rem; border:1px solid var(--border); border-radius:10px;
  font-size:0.95rem; font-family:inherit; background:#fff; outline:none;
}

/* ============ News List ============ */
.news-list-item {
  display:block; padding:1.5rem; background:#fff; border-radius:var(--radius);
  border:1px solid var(--border); text-decoration:none; transition:var(--transition);
  margin-bottom:16px;
}
.news-list-item:hover { box-shadow:var(--shadow); border-color:var(--primary); }
.news-meta { display:flex; gap:12px; align-items:center; margin-bottom:8px; flex-wrap:wrap; }
.news-category {
  padding:2px 10px; border-radius:20px; font-size:0.75rem; font-weight:600;
}
.cat-company { background:#eff6ff; color:#2563eb; }
.cat-product { background:#f0fdf4; color:#16a34a; }
.cat-industry { background:#fefce8; color:#ca8a04; }
.news-date, .news-source { color:var(--text-light); font-size:0.8rem; }
.news-list-item h3 { color:var(--text-primary); font-weight:700; font-size:1.1rem; margin-bottom:6px; }
.news-list-item p { color:var(--text-secondary); font-size:0.9rem; }

/* ============ Pagination ============ */
.pagination { display:flex; gap:8px; justify-content:center; margin-top:40px; }
.page-btn {
  width:40px; height:40px; border-radius:10px; display:flex; align-items:center;
  justify-content:center; border:1px solid var(--border); color:var(--text-secondary);
  text-decoration:none; font-weight:600; font-size:0.9rem; transition:var(--transition);
}
.page-btn:hover { border-color:var(--primary); color:var(--primary); }
.page-btn.active { background:var(--primary); color:#fff; border-color:var(--primary); }

/* ============ Footer ============ */
.footer { background:var(--bg-dark); color:#94a3b8; padding:60px 0 0; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1.3fr; gap:40px; }
.footer-col h4 { color:#fff; font-size:1rem; font-weight:700; margin-bottom:16px; display:flex; align-items:center; gap:8px; }
.footer-col p { font-size:0.9rem; line-height:1.7; margin-bottom:16px; }
.footer-col ul { list-style:none; }
.footer-col ul li { margin-bottom:10px; }
.footer-col ul li a { color:#94a3b8; text-decoration:none; font-size:0.9rem; transition:var(--transition); }
.footer-col ul li a:hover { color:#fff; }
.contact-info li { display:flex; align-items:flex-start; gap:10px; }
.contact-info li i { color:var(--accent); margin-top:4px; width:16px; }
.social-links { display:flex; gap:10px; }
.social-links a {
  width:36px; height:36px; border-radius:50%; background:rgba(255,255,255,0.08);
  display:flex; align-items:center; justify-content:center;
  color:#94a3b8; text-decoration:none; transition:var(--transition);
}
.social-links a:hover { background:var(--primary); color:#fff; }
.footer-bottom {
  margin-top:40px; padding:20px 0; border-top:1px solid rgba(255,255,255,0.06);
  text-align:center; font-size:0.8rem;
}

/* ============ Back to top ============ */
.back-to-top {
  position:fixed; bottom:30px; right:30px; width:44px; height:44px;
  border-radius:50%; background:var(--primary); color:#fff; border:none;
  cursor:pointer; z-index:998; opacity:0; visibility:hidden; transition:var(--transition);
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 4px 16px rgba(79,70,229,0.3);
}
.back-to-top.visible { opacity:1; visibility:visible; }
.back-to-top:hover { transform:translateY(-2px); }

/* ============ Utility ============ */
.text-gradient {
  background:linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
}
.grid-2 { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.grid-3 { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.grid-4 { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.badge {
  display:inline-block; padding:3px 12px; border-radius:20px;
  font-size:0.75rem; font-weight:600;
}
.badge-purple { background:#f3e8ff; color:#7c3aed; }
.badge-blue { background:#dbeafe; color:#2563eb; }
.badge-cyan { background:#cffafe; color:#0891b2; }
.badge-green { background:#dcfce7; color:#16a34a; }
.badge-orange { background:#fff7ed; color:#ea580c; }

/* ============ Hero Banner (Homepage) ============ */
.home-hero {
  min-height:85vh; display:flex; align-items:center; background:var(--bg-dark);
  position:relative; overflow:hidden;
}
.home-hero::before {
  content:''; position:absolute; top:-20%; right:-10%; width:700px; height:700px;
  background:radial-gradient(circle, rgba(99,102,241,0.18) 0%, transparent 70%);
}
.home-hero::after {
  content:''; position:absolute; bottom:-10%; left:-5%; width:500px; height:500px;
  background:radial-gradient(circle, rgba(6,182,212,0.15) 0%, transparent 70%);
}
.home-hero-content { position:relative; z-index:1; max-width:700px; }
.home-hero-badge {
  display:inline-block; padding:6px 16px; border-radius:20px;
  background:rgba(99,102,241,0.2); border:1px solid rgba(99,102,241,0.3);
  color:#a5b4fc; font-size:0.85rem; font-weight:600; margin-bottom:20px;
}
.home-hero h1 {
  font-size:3.5rem; font-weight:900; color:#fff; line-height:1.15; letter-spacing:-0.03em; margin-bottom:20px;
}
.home-hero h1 span { background:linear-gradient(135deg, #6366f1, #06b6d4); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.home-hero p { color:#94a3b8; font-size:1.2rem; max-width:550px; margin-bottom:32px; line-height:1.7; }
.home-hero-buttons { display:flex; gap:16px; flex-wrap:wrap; }

/* ============ Section Dark Cards ============ */
.section-dark .card { background:var(--bg-card); border-color:rgba(255,255,255,0.06); }
.section-dark .card h3 { color:#fff; }
.section-dark .card p { color:#94a3b8; }

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:repeat(2,1fr); }
  .stats-grid { grid-template-columns:repeat(2,1fr); }
  .process-grid { grid-template-columns:repeat(2,1fr); }
  .process-step:not(:last-child)::after { display:none; }
}
@media (max-width: 768px) {
  .nav { display:none; }
  .menu-toggle { display:block; }
  .home-hero h1 { font-size:2.2rem; }
  .home-hero { min-height:auto; padding:80px 0 60px; }
  .page-hero h1 { font-size:2rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; }
  .stats-grid { grid-template-columns:repeat(2,1fr); }
  .process-grid { grid-template-columns:repeat(2,1fr); }
  .section { padding:50px 0; }
  .section-header h2 { font-size:1.6rem; }
}