/* ===== 科都云智守官网 - 全局样式 v2.0 优化版 ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --accent: #06b6d4;
  --accent-dark: #0891b2;
  --gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
  --gradient-dark: linear-gradient(135deg, #1e3a5f 0%, #0f172a 100%);
  --gradient-warm: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  --text: #1e293b;
  --text-light: #64748b;
  --text-lighter: #94a3b8;
  --bg: #ffffff;
  --bg-gray: #f8fafc;
  --bg-dark: #0f172a;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
}

/* 基础重置与优化 */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; font-size:16px; -webkit-text-size-adjust:100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color:var(--text); line-height:1.6; overflow-x:hidden;
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}
::selection { background:rgba(37,99,235,0.15); color:var(--primary-dark); }
a { text-decoration:none; color:inherit; transition:var(--transition); }
img { max-width:100%; display:block; }
button { font-family:inherit; }
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
section { padding:100px 0; }

/* 自定义滚动条 */
::-webkit-scrollbar { width:8px; }
::-webkit-scrollbar-track { background:#f1f5f9; }
::-webkit-scrollbar-thumb { background:#cbd5e1; border-radius:4px; }
::-webkit-scrollbar-thumb:hover { background:#94a3b8; }

/* ===== 导航栏 ===== */
.navbar { position:fixed; top:0; left:0; width:100%; z-index:1000; padding:18px 0; transition:var(--transition); }
.navbar.scrolled { background:rgba(255,255,255,0.97); backdrop-filter:blur(20px) saturate(180%); -webkit-backdrop-filter:blur(20px) saturate(180%); box-shadow:0 1px 20px rgba(0,0,0,0.06); padding:12px 0; }
.navbar .container { display:flex; align-items:center; justify-content:space-between; }
.nav-logo { display:flex; align-items:center; gap:10px; font-size:20px; font-weight:700; color:#fff; letter-spacing:-0.3px; }
.navbar.scrolled .nav-logo { color:var(--text); }
.nav-logo-icon { width:38px; height:38px; background:var(--gradient); border-radius:10px; display:flex; align-items:center; justify-content:center; color:#fff; font-size:18px; font-weight:800; box-shadow:0 2px 8px rgba(37,99,235,0.3); }
.nav-links { display:flex; gap:28px; align-items:center; }
.nav-links a { color:rgba(255,255,255,0.85); font-size:14px; font-weight:500; position:relative; padding:4px 0; }
.navbar.scrolled .nav-links a { color:var(--text-light); }
.nav-links a:hover { color:#fff; }
.navbar.scrolled .nav-links a:hover { color:var(--primary); }
.nav-links a::after { content:''; position:absolute; bottom:0; left:50%; width:0; height:2px; background:var(--accent); transition:var(--transition); transform:translateX(-50%); border-radius:1px; }
.nav-links a:hover::after { width:100%; }
.nav-cta { background:rgba(255,255,255,0.15) !important; border:1px solid rgba(255,255,255,0.25); padding:7px 20px !important; border-radius:20px; color:#fff !important; font-weight:600; backdrop-filter:blur(10px); }
.nav-cta:hover { background:rgba(255,255,255,0.95) !important; color:var(--primary) !important; }
.nav-cta::after { display:none !important; }
.navbar.scrolled .nav-cta { background:var(--primary) !important; border-color:var(--primary); color:#fff !important; }
.navbar.scrolled .nav-cta:hover { background:var(--primary-dark) !important; transform:translateY(-1px); box-shadow:0 4px 12px rgba(37,99,235,0.3); }
.nav-toggle { display:none; flex-direction:column; gap:5px; cursor:pointer; padding:4px; }
.nav-toggle span { width:22px; height:2px; background:#fff; transition:var(--transition); border-radius:1px; }
.navbar.scrolled .nav-toggle span { background:var(--text); }

/* ===== Hero ===== */
.hero { min-height:100vh; background:var(--gradient-dark); position:relative; display:flex; align-items:center; overflow:hidden; }
.hero::before { content:''; position:absolute; top:-40%; right:-15%; width:700px; height:700px; background:radial-gradient(circle,rgba(6,182,212,0.12) 0%,transparent 65%); pointer-events:none; }
.hero::after { content:''; position:absolute; bottom:-25%; left:-8%; width:500px; height:500px; background:radial-gradient(circle,rgba(37,99,235,0.12) 0%,transparent 65%); pointer-events:none; }
.hero .container { position:relative; z-index:2; display:flex; align-items:center; gap:60px; }
.hero-content { flex:1; }
.hero-badge { display:inline-flex; align-items:center; gap:8px; background:rgba(6,182,212,0.12); border:1px solid rgba(6,182,212,0.25); padding:6px 16px; border-radius:20px; color:var(--accent); font-size:13px; font-weight:600; margin-bottom:28px; }
.hero-badge::before { content:''; width:6px; height:6px; background:var(--accent); border-radius:50%; animation:pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.4;transform:scale(0.8)} }
.hero h1 { font-size:50px; font-weight:800; color:#fff; line-height:1.15; margin-bottom:20px; letter-spacing:-1px; }
.hero h1 span { background:linear-gradient(135deg,#60a5fa,#22d3ee); -webkit-background-clip:text; background-clip:text; color:transparent; }
.hero-desc { font-size:17px; color:rgba(255,255,255,0.65); line-height:1.8; margin-bottom:36px; max-width:520px; }
.hero-btns { display:flex; gap:14px; flex-wrap:wrap; }
.btn-primary { display:inline-flex; align-items:center; gap:8px; padding:14px 30px; background:var(--gradient); color:#fff; border-radius:12px; font-size:15px; font-weight:600; border:none; cursor:pointer; transition:var(--transition); box-shadow:0 4px 20px rgba(37,99,235,0.35); }
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 30px rgba(37,99,235,0.45); }
.btn-primary:active { transform:translateY(0); }
.btn-outline { display:inline-flex; align-items:center; gap:8px; padding:14px 30px; background:transparent; color:#fff; border:1.5px solid rgba(255,255,255,0.25); border-radius:12px; font-size:15px; font-weight:600; cursor:pointer; transition:var(--transition); }
.btn-outline:hover { border-color:rgba(255,255,255,0.6); background:rgba(255,255,255,0.08); }
.hero-visual { flex:1; display:flex; justify-content:center; }
.hero-mockup { position:relative; width:320px; }
.phone-frame { width:280px; height:560px; background:linear-gradient(145deg,#1a1a2e,#16213e); border-radius:36px; border:2.5px solid rgba(255,255,255,0.08); padding:12px; box-shadow:0 30px 60px rgba(0,0,0,0.4),inset 0 1px 0 rgba(255,255,255,0.05); position:relative; overflow:hidden; }
.phone-screen { width:100%; height:100%; background:linear-gradient(180deg,#1e3a5f 0%,#0f172a 100%); border-radius:26px; overflow:hidden; display:flex; flex-direction:column; }
.phone-status { padding:12px 20px 8px; display:flex; justify-content:space-between; color:rgba(255,255,255,0.5); font-size:11px; }
.phone-app-header { padding:16px 20px; text-align:center; }
.phone-app-header h3 { color:#fff; font-size:15px; font-weight:600; margin-bottom:2px; }
.phone-app-header p { color:rgba(255,255,255,0.4); font-size:11px; }
.phone-stats { display:grid; grid-template-columns:1fr 1fr; gap:8px; padding:0 14px; margin-top:10px; }
.phone-stat-card { background:rgba(255,255,255,0.05); border:1px solid rgba(255,255,255,0.06); border-radius:12px; padding:12px 10px; text-align:center; }
.phone-stat-card .num { font-size:20px; font-weight:700; color:var(--accent); letter-spacing:-0.5px; }
.phone-stat-card .label { font-size:10px; color:rgba(255,255,255,0.4); margin-top:2px; }
.phone-menu { display:grid; grid-template-columns:repeat(4,1fr); gap:6px; padding:14px; margin-top:auto; }
.phone-menu-item { text-align:center; }
.phone-menu-item .icon { width:34px; height:34px; margin:0 auto 3px; border-radius:9px; display:flex; align-items:center; justify-content:center; font-size:15px; }
.phone-menu-item .icon.blue { background:rgba(37,99,235,0.15); }
.phone-menu-item .icon.cyan { background:rgba(6,182,212,0.15); }
.phone-menu-item .icon.green { background:rgba(16,185,129,0.15); }
.phone-menu-item .icon.orange { background:rgba(245,158,11,0.15); }
.phone-menu-item span { font-size:10px; color:rgba(255,255,255,0.4); }
.float-card { position:absolute; background:rgba(255,255,255,0.97); border-radius:12px; padding:10px 14px; box-shadow:var(--shadow-lg); animation:float 4s ease-in-out infinite; backdrop-filter:blur(10px); }
.float-card.card1 { top:80px; right:-55px; animation-delay:0s; }
.float-card.card2 { bottom:120px; left:-45px; animation-delay:2s; }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
.float-card .fc-icon { font-size:18px; margin-bottom:2px; }
.float-card .fc-text { font-size:12px; font-weight:600; color:var(--text); }
.float-card .fc-sub { font-size:10px; color:var(--text-light); }

/* ===== 数据统计条 ===== */
.stats-bar { background:var(--bg); padding:44px 0; border-bottom:1px solid var(--border); }
.stats-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:40px; text-align:center; }
.stat-item .stat-num { font-size:34px; font-weight:800; background:var(--gradient); -webkit-background-clip:text; background-clip:text; color:transparent; letter-spacing:-1px; }
.stat-item .stat-label { font-size:13px; color:var(--text-light); margin-top:4px; font-weight:500; }

/* ===== 通用Section头 ===== */
.section-header { text-align:center; margin-bottom:56px; }
.section-tag { display:inline-block; background:rgba(37,99,235,0.07); color:var(--primary); padding:5px 16px; border-radius:20px; font-size:13px; font-weight:600; margin-bottom:14px; letter-spacing:0.5px; }
.section-header h2 { font-size:34px; font-weight:800; margin-bottom:12px; letter-spacing:-0.5px; color:var(--text); }
.section-header p { font-size:15px; color:var(--text-light); max-width:580px; margin:0 auto; line-height:1.7; }

/* ===== 产品矩阵 ===== */
.products { background:var(--bg-gray); }
.products-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.product-card { background:#fff; border-radius:var(--radius); padding:30px; transition:var(--transition); border:1px solid var(--border); position:relative; overflow:hidden; }
.product-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); border-color:transparent; }
.product-card::before { content:''; position:absolute; top:0; left:0; right:0; height:3px; background:var(--gradient); opacity:0; transition:var(--transition); }
.product-card:hover::before { opacity:1; }
.pc-icon { width:52px; height:52px; border-radius:13px; display:flex; align-items:center; justify-content:center; font-size:26px; margin-bottom:18px; }
.pc-icon.blue { background:rgba(37,99,235,0.08); }
.pc-icon.cyan { background:rgba(6,182,212,0.08); }
.pc-icon.green { background:rgba(16,185,129,0.08); }
.pc-icon.orange { background:rgba(245,158,11,0.08); }
.pc-icon.purple { background:rgba(139,92,246,0.08); }
.pc-icon.rose { background:rgba(244,63,94,0.08); }
.product-card h3 { font-size:18px; font-weight:700; margin-bottom:8px; }
.product-card p { font-size:13px; color:var(--text-light); line-height:1.7; margin-bottom:14px; }
.pc-tags { display:flex; flex-wrap:wrap; gap:5px; }
.pc-tag { background:var(--bg-gray); padding:3px 10px; border-radius:6px; font-size:11px; color:var(--text-light); font-weight:500; border:1px solid transparent; transition:var(--transition-fast); }
.product-card:hover .pc-tag { border-color:var(--border); }

/* ===== 核心功能 ===== */
.features { background:var(--bg); }
.feature-row { display:flex; align-items:center; gap:72px; margin-bottom:80px; }
.feature-row:nth-child(even) { flex-direction:row-reverse; }
.feature-row:last-child { margin-bottom:0; }
.feature-text { flex:1; }
.feature-text .ft-tag { display:inline-flex; align-items:center; gap:6px; font-size:13px; font-weight:600; color:var(--primary); margin-bottom:12px; }
.feature-text h3 { font-size:26px; font-weight:700; margin-bottom:12px; letter-spacing:-0.3px; }
.feature-text p { font-size:14px; color:var(--text-light); line-height:1.8; margin-bottom:22px; }
.feature-list { list-style:none; display:flex; flex-direction:column; gap:10px; }
.feature-list li { display:flex; align-items:flex-start; gap:10px; font-size:13.5px; color:var(--text); line-height:1.6; }
.feature-list li::before { content:''; width:20px; height:20px; min-width:20px; background:rgba(16,185,129,0.1); color:#10b981; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:11px; font-weight:700; margin-top:2px; }
.feature-visual { flex:1; }
.feature-img-box { background:var(--bg-gray); border-radius:var(--radius); padding:36px; display:flex; align-items:center; justify-content:center; min-height:340px; }
.feat-demo { width:100%; max-width:380px; }
.feat-demo-header { background:var(--gradient); padding:18px 22px; border-radius:13px 13px 0 0; color:#fff; }
.feat-demo-header h4 { font-size:15px; font-weight:600; margin-bottom:2px; }
.feat-demo-header p { font-size:11px; opacity:0.7; }
.feat-demo-body { background:#fff; padding:16px 22px; border-radius:0 0 13px 13px; box-shadow:var(--shadow-sm); }
.feat-demo-row { display:flex; justify-content:space-between; align-items:center; padding:9px 0; border-bottom:1px solid #f1f5f9; }
.feat-demo-row:last-child { border-bottom:none; }
.feat-demo-row .label { font-size:13px; color:var(--text-light); }
.feat-demo-row .value { font-size:13px; font-weight:600; }
.feat-demo-row .value.up { color:#10b981; }
.feat-demo-row .value.primary { color:var(--primary); }

/* ===== 解决方案/平台服务 ===== */
.solutions { background:var(--bg-dark); color:#fff; }
.solutions .section-header h2 { color:#fff; }
.solutions .section-header p { color:rgba(255,255,255,0.55); }
.solutions .section-tag { background:rgba(6,182,212,0.12); color:var(--accent); }
.solutions-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:20px; }
.solution-card { background:rgba(255,255,255,0.04); border:1px solid rgba(255,255,255,0.07); border-radius:var(--radius); padding:28px; transition:var(--transition); }
.solution-card:hover { background:rgba(255,255,255,0.07); border-color:rgba(255,255,255,0.12); transform:translateY(-2px); }
.sc-header { display:flex; align-items:center; gap:14px; margin-bottom:14px; }
.sc-icon { width:44px; height:44px; border-radius:11px; display:flex; align-items:center; justify-content:center; font-size:22px; flex-shrink:0; }
.sc-icon.i1 { background:rgba(37,99,235,0.2); }
.sc-icon.i2 { background:rgba(6,182,212,0.2); }
.sc-icon.i3 { background:rgba(16,185,129,0.2); }
.sc-icon.i4 { background:rgba(245,158,11,0.2); }
.sc-header h3 { font-size:16px; font-weight:700; font-family:'Consolas','Monaco','PingFang SC',monospace; letter-spacing:-0.3px; }
.solution-card p { font-size:13px; color:rgba(255,255,255,0.55); line-height:1.75; }
.solution-card p strong { color:var(--accent); font-weight:600; }

/* ===== 技术架构 ===== */
.tech { background:var(--bg-gray); }
.tech-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; }
.tech-card { background:#fff; border-radius:var(--radius); padding:26px; text-align:center; transition:var(--transition); border:1px solid var(--border); }
.tech-card:hover { transform:translateY(-4px); box-shadow:var(--shadow); border-color:transparent; }
.tc-icon { font-size:32px; margin-bottom:10px; }
.tech-card h4 { font-size:15px; font-weight:700; margin-bottom:5px; }
.tech-card p { font-size:12px; color:var(--text-light); line-height:1.6; }

/* ===== 软件开发服务 ===== */
.services { background:var(--bg); }
.services-main { display:flex; flex-direction:column; gap:44px; }
.services-types { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.svc-card { background:var(--bg-gray); border:1px solid var(--border); border-radius:var(--radius); padding:26px; transition:var(--transition); position:relative; overflow:hidden; }
.svc-card:hover { transform:translateY(-3px); box-shadow:var(--shadow-lg); border-color:var(--primary); }
.svc-card::after { content:''; position:absolute; bottom:0; left:0; right:0; height:3px; background:var(--gradient); opacity:0; transition:var(--transition); }
.svc-card:hover::after { opacity:1; }
.svc-icon { font-size:30px; margin-bottom:12px; }
.svc-card h3 { font-size:17px; font-weight:700; margin-bottom:6px; }
.svc-card p { font-size:12.5px; color:var(--text-light); line-height:1.7; }
.services-langs { text-align:center; }
.services-langs h4 { font-size:15px; font-weight:700; margin-bottom:14px; color:var(--text); }
.services-langs h4:nth-of-type(2) { margin-top:24px; }
.lang-tags { display:flex; flex-wrap:wrap; justify-content:center; gap:8px; }
.lang-tag { background:rgba(37,99,235,0.05); color:var(--primary); border:1px solid rgba(37,99,235,0.12); padding:5px 16px; border-radius:20px; font-size:13px; font-weight:600; transition:var(--transition); cursor:default; }
.lang-tag:hover { background:var(--primary); color:#fff; border-color:var(--primary); }
.lang-tag.ind { background:rgba(6,182,212,0.05); color:var(--accent-dark); border-color:rgba(6,182,212,0.12); }
.lang-tag.ind:hover { background:var(--accent-dark); color:#fff; border-color:var(--accent-dark); }

/* ===== 下载区域 ===== */
.download { background:var(--bg-gray); }
.download-cards { display:grid; grid-template-columns:repeat(4,1fr); gap:22px; }
.dl-card { background:#fff; border:2px solid var(--border); border-radius:var(--radius); padding:36px 28px; text-align:center; transition:var(--transition); position:relative; }
.dl-card:hover { border-color:var(--primary); box-shadow:var(--shadow-lg); transform:translateY(-2px); }
.dl-card.featured { border-color:var(--primary); }
.dl-card.featured::before { content:'推荐'; position:absolute; top:14px; right:14px; background:var(--gradient); color:#fff; padding:3px 10px; border-radius:8px; font-size:11px; font-weight:600; }
.dl-icon { font-size:44px; margin-bottom:14px; }
.dl-card h3 { font-size:20px; font-weight:700; margin-bottom:6px; }
.dl-card .dl-desc { font-size:13px; color:var(--text-light); margin-bottom:20px; line-height:1.7; }
.dl-card .dl-info { display:flex; flex-direction:column; gap:6px; margin-bottom:22px; text-align:left; }
.dl-card .dl-info-item { display:flex; justify-content:space-between; font-size:12.5px; padding:5px 0; border-bottom:1px solid #f1f5f9; }
.dl-card .dl-info-item .k { color:var(--text-light); }
.dl-card .dl-info-item .v { font-weight:600; }
.dl-btn { display:inline-flex; align-items:center; gap:8px; padding:11px 28px; border-radius:var(--radius-sm); font-size:14px; font-weight:600; cursor:pointer; transition:var(--transition); border:none; width:100%; justify-content:center; }
.dl-btn.primary { background:var(--gradient); color:#fff; box-shadow:0 3px 14px rgba(37,99,235,0.25); }
.dl-btn.primary:hover { box-shadow:0 6px 22px rgba(37,99,235,0.35); transform:translateY(-1px); }
.dl-btn.outline { background:transparent; color:var(--primary); border:1.5px solid var(--primary); margin-top:8px; }
.dl-btn.outline:hover { background:var(--primary); color:#fff; }

/* ===== CTA ===== */
.cta { background:var(--gradient-dark); padding:80px 0; text-align:center; position:relative; overflow:hidden; }
.cta::before { content:''; position:absolute; top:-40%; right:-15%; width:500px; height:500px; background:radial-gradient(circle,rgba(6,182,212,0.08) 0%,transparent 65%); pointer-events:none; }
.cta h2 { font-size:34px; font-weight:800; color:#fff; margin-bottom:14px; position:relative; z-index:2; letter-spacing:-0.5px; }
.cta p { font-size:15px; color:rgba(255,255,255,0.6); margin-bottom:30px; position:relative; z-index:2; }
.cta-btns { display:flex; gap:14px; justify-content:center; position:relative; z-index:2; }

/* ===== 页脚 ===== */
.footer { background:#080d16; color:rgba(255,255,255,0.5); padding:56px 0 28px; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:36px; margin-bottom:36px; }
.footer-brand h3 { color:#fff; font-size:18px; font-weight:700; margin-bottom:10px; }
.footer-brand p { font-size:13px; line-height:1.7; }
.footer-col h4 { color:rgba(255,255,255,0.85); font-size:14px; font-weight:600; margin-bottom:14px; }
.footer-col a { display:block; font-size:13px; padding:3px 0; transition:var(--transition); }
.footer-col a:hover { color:var(--accent); padding-left:4px; }
.footer-bottom { border-top:1px solid rgba(255,255,255,0.06); padding-top:22px; display:flex; justify-content:space-between; align-items:center; font-size:12px; }
.footer-bottom a:hover { color:var(--accent); }

/* ===== 响应式 ===== */
@media(max-width:1024px) {
  .hero .container { flex-direction:column; text-align:center; padding-top:120px; }
  .hero h1 { font-size:34px; }
  .hero-desc { margin:0 auto 28px; }
  .hero-btns { justify-content:center; }
  .hero-visual { margin-top:36px; }
  .products-grid { grid-template-columns:repeat(2,1fr); }
  .feature-row, .feature-row:nth-child(even) { flex-direction:column; gap:36px; }
  .solutions-grid { grid-template-columns:1fr; }
  .tech-grid { grid-template-columns:repeat(2,1fr); }
  .services-types { grid-template-columns:repeat(2,1fr); }
  .download-cards { grid-template-columns:repeat(2,1fr); max-width:none; }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .stats-grid { grid-template-columns:repeat(2,1fr); gap:20px; }
}
@media(max-width:768px) {
  .download-cards { grid-template-columns:1fr !important; max-width:380px; margin:0 auto; }
  section { padding:72px 0; }
  .nav-links { display:none; position:fixed; top:0; left:0; width:100%; height:100vh; background:rgba(8,13,22,0.98); flex-direction:column; justify-content:center; align-items:center; gap:20px; backdrop-filter:blur(20px); }
  .nav-links.active { display:flex; }
  .nav-links a { color:#fff !important; font-size:18px; }
  .nav-toggle { display:flex; }
  .hero h1 { font-size:26px; }
  .hero-desc { font-size:15px; }
  .section-header h2 { font-size:26px; }
  .products-grid { grid-template-columns:1fr; }
  .services-types { grid-template-columns:1fr; }
  .float-card { display:none; }
  .footer-grid { grid-template-columns:1fr; gap:24px; }
  .footer-bottom { flex-direction:column; gap:8px; text-align:center; }
  .cta h2 { font-size:26px; }
}
@media(max-width:480px) {
  .container { padding:0 16px; }
  .hero h1 { font-size:24px; }
  .stats-grid { grid-template-columns:1fr 1fr; gap:16px; }
  .stat-item .stat-num { font-size:26px; }
  .tech-grid { grid-template-columns:1fr 1fr; gap:12px; }
  .lang-tags { gap:6px; }
  .lang-tag { font-size:12px; padding:4px 12px; }
}