/* ============================================================
   漏刻有时 LOCKDATAV 官网公共样式
   从 index.html 内联 <style> 分离，维护时改本文件即可
   ============================================================ */

/* ================= 主题变量 ================= */
:root {
  --bg: #f3f6fb; --bg-soft: #ffffff; --bg-alt: #eaf0f8; --bg-card: #ffffff;
  --bg-nav: rgba(255,255,255,0.82); --bg-input: #f6f9fd;
  --text: #0f2440; --text-2: #46586f; --text-3: #8294ad;
  --brand: #1a6cff; --brand-deep: #0b4fd6; --cyan: #00a9c8; --cyan-bright: #06b6d4;
  --line: #e2e9f3; --line-soft: #edf2f9;
  --shadow: 0 12px 40px rgba(23,65,130,0.08); --shadow-hover: 0 18px 50px rgba(23,80,180,0.14);
  --glow: rgba(26,108,255,0.10); --grid-line: rgba(26,108,255,0.05); --particle: 26,108,255;
  --hero-grad-a: #0f2a5c; --hero-grad-b: #1a6cff; --hero-grad-c: #06b6d4;
  --card-hover-border: rgba(26,108,255,0.45); --tag-bg: rgba(26,108,255,0.08); --tag-color: #1a6cff;
  --nav-hover-bg: rgba(26,108,255,0.07);
}
[data-theme="dark"] {
  --bg: #0a1128; --bg-soft: #0d1832; --bg-alt: #0c1630; --bg-card: rgba(18,30,60,0.62);
  --bg-nav: rgba(8,14,34,0.82); --bg-input: rgba(8,16,38,0.7);
  --text: #e9f1ff; --text-2: #9db0cf; --text-3: #66789a;
  --brand: #3d8bff; --brand-deep: #2f7bff; --cyan: #00e5ff; --cyan-bright: #00e5ff;
  --line: rgba(80,130,220,0.18); --line-soft: rgba(80,130,220,0.10);
  --shadow: 0 12px 40px rgba(0,0,0,0.45); --shadow-hover: 0 18px 55px rgba(0,180,255,0.13);
  --glow: rgba(0,229,255,0.10); --grid-line: rgba(0,229,255,0.04); --particle: 0,200,255;
  --hero-grad-a: #ffffff; --hero-grad-b: #00e5ff; --hero-grad-c: #3d8bff;
  --card-hover-border: rgba(0,229,255,0.45); --tag-bg: rgba(0,229,255,0.08); --tag-color: #00e5ff;
  --nav-hover-bg: rgba(0,229,255,0.07);
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  background:var(--bg); color:var(--text); line-height:1.6; overflow-x:hidden;
  transition:background 0.4s ease, color 0.4s ease;
}
::-webkit-scrollbar { width:8px; }
::-webkit-scrollbar-track { background:var(--bg-alt); }
::-webkit-scrollbar-thumb { background:var(--brand); border-radius:4px; }

/* ================= 导航栏 ================= */
.navbar {
  position:fixed; top:0; left:0; right:0; z-index:1000; padding:16px 5%;
  display:flex; align-items:center; justify-content:space-between;
  background:var(--bg-nav); backdrop-filter:blur(18px); -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line-soft); transition:all 0.3s ease;
}
.navbar.scrolled { padding:10px 5%; box-shadow:var(--shadow); }
.nav-logo { display:flex; align-items:center; gap:12px; text-decoration:none; color:var(--text); }
.logo-img {
  height:40px; width:auto; max-width:150px; border-radius:9px; object-fit:contain;
  display:block; box-shadow:0 4px 16px var(--glow);
}
.footer-brand .logo-img { height:44px; }
.logo-text { line-height:1.25; }
.logo-text .lt-main { font-size:19px; font-weight:800; letter-spacing:0.5px; }
.logo-text .lt-main span { color:var(--brand); }
[data-theme="dark"] .logo-text .lt-main span { color:var(--cyan); }
.logo-text .lt-sub { font-size:10px; color:var(--text-3); letter-spacing:2.5px; }
.nav-menu { display:flex; gap:4px; list-style:none; align-items:center; }
.nav-menu a {
  color:var(--text-2); text-decoration:none; padding:8px 16px; border-radius:8px;
  font-size:15px; transition:all 0.25s;
}
.nav-menu a:hover { color:var(--brand); background:var(--nav-hover-bg); }
[data-theme="dark"] .nav-menu a:hover { color:var(--cyan); }
.nav-right { display:flex; align-items:center; gap:12px; }
.theme-toggle {
  width:40px; height:40px; border-radius:10px; border:1px solid var(--line);
  background:var(--bg-card); color:var(--text-2); cursor:pointer; font-size:18px;
  display:flex; align-items:center; justify-content:center; transition:all 0.3s;
}
.theme-toggle:hover { color:var(--brand); border-color:var(--brand); transform:translateY(-2px); }
[data-theme="dark"] .theme-toggle:hover { color:var(--cyan); border-color:var(--cyan); }
.nav-cta {
  padding:10px 26px; border-radius:10px; text-decoration:none;
  background:linear-gradient(135deg,var(--brand),var(--cyan-bright));
  color:#fff; font-weight:700; font-size:14px; transition:all 0.3s; box-shadow:0 6px 20px var(--glow);
}
.nav-cta:hover { transform:translateY(-2px); box-shadow:0 10px 30px var(--glow); opacity:0.92; }
.nav-toggle {
  display:none; width:40px; height:40px; border-radius:10px; border:1px solid var(--line);
  background:var(--bg-card); color:var(--text-2); cursor:pointer; font-size:18px;
  align-items:center; justify-content:center; transition:all 0.3s;
}
.nav-toggle:hover { color:var(--brand); border-color:var(--brand); transform:translateY(-2px); }
[data-theme="dark"] .nav-toggle:hover { color:var(--cyan); border-color:var(--cyan); }

/* ================= Hero ================= */
.hero {
  position:relative; min-height:100vh; display:flex; align-items:center; justify-content:center;
  overflow:hidden; padding:130px 5% 70px;
  background:radial-gradient(ellipse 80% 55% at 50% -10%, var(--glow), transparent 70%), var(--bg);
}
#particle-canvas { position:absolute; inset:0; width:100%; height:100%; z-index:0; }
.hero-grid-bg {
  position:absolute; inset:0; z-index:0;
  background-image:linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size:52px 52px;
  mask-image:radial-gradient(ellipse 70% 65% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 70% 65% at 50% 40%, #000 30%, transparent 75%);
}
.hero-glow {
  position:absolute; width:620px; height:620px; border-radius:50%;
  background:radial-gradient(circle, var(--glow), transparent 70%);
  top:15%; left:50%; transform:translateX(-50%); z-index:0; animation:pulse-glow 5s ease-in-out infinite;
}
@keyframes pulse-glow { 0%,100% { opacity:0.6; transform:translateX(-50%) scale(1);} 50% { opacity:1; transform:translateX(-50%) scale(1.08);} }
.scan-line {
  position:absolute; left:0; right:0; height:2px;
  background:linear-gradient(90deg, transparent, var(--cyan-bright), transparent);
  opacity:0.25; z-index:1; animation:scan 7s linear infinite;
}
@keyframes scan { 0% { top:0;} 100% { top:100%;} }
.hero-content { position:relative; z-index:2; text-align:center; max-width:920px; }
.hero-badge {
  display:inline-flex; align-items:center; gap:8px; padding:7px 22px; border-radius:30px; font-size:13px;
  background:var(--tag-bg); border:1px solid var(--line); color:var(--brand); margin-bottom:30px; letter-spacing:1px;
}
[data-theme="dark"] .hero-badge { color:var(--cyan); border-color:rgba(0,229,255,0.25); }
.hero-badge .dot { width:8px; height:8px; background:#22c55e; border-radius:50%; box-shadow:0 0 10px #22c55e; animation:blink 1.6s infinite; }
@keyframes blink { 50% { opacity:0.3;} }
.hero h1 {
  font-size:58px; font-weight:900; line-height:1.18; margin-bottom:24px;
  background:linear-gradient(135deg, var(--hero-grad-a) 0%, var(--hero-grad-b) 55%, var(--hero-grad-c) 100%);
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.hero h1 .highlight { display:block; font-size:68px; }
.hero-subtitle { font-size:19px; color:var(--text-2); margin:0 auto 26px; max-width:720px; }
.hero-tagline { font-size:16px; color:var(--brand); margin-bottom:42px; letter-spacing:3px; font-weight:600; }
[data-theme="dark"] .hero-tagline { color:var(--cyan); }
.hero-buttons { display:flex; gap:18px; justify-content:center; flex-wrap:wrap; }
.btn-primary, .btn-secondary {
  padding:14px 38px; border-radius:10px; text-decoration:none; font-size:16px; font-weight:700;
  transition:all 0.3s; display:inline-flex; align-items:center; gap:8px;
}
.btn-primary { background:linear-gradient(135deg,var(--brand),var(--cyan-bright)); color:#fff; box-shadow:0 8px 24px var(--glow); }
.btn-primary:hover { transform:translateY(-3px); box-shadow:0 14px 36px var(--glow); opacity:0.94; }
.btn-secondary { background:var(--bg-card); color:var(--brand); border:1.5px solid var(--line); }
[data-theme="dark"] .btn-secondary { color:var(--cyan); border-color:rgba(0,229,255,0.35); }
.btn-secondary:hover { transform:translateY(-3px); border-color:var(--brand); box-shadow:var(--shadow); }
[data-theme="dark"] .btn-secondary:hover { border-color:var(--cyan); }
.hero-stats { display:flex; gap:56px; justify-content:center; margin-top:64px; flex-wrap:wrap; }
.hero-stat { text-align:center; }
.hero-stat .num { font-size:40px; font-weight:900; color:var(--brand); font-family:'Consolas','Menlo',monospace; }
[data-theme="dark"] .hero-stat .num { color:var(--cyan); }
.hero-stat .label { font-size:14px; color:var(--text-3); margin-top:4px; }

/* ================= 通用 Section ================= */
.section { padding:96px 5%; position:relative; }
.section.alt-bg { background:var(--bg-alt); }
.section-header { text-align:center; margin-bottom:60px; }
.section-tag {
  display:inline-block; padding:5px 18px; border-radius:6px; font-size:13px;
  color:var(--brand); background:var(--tag-bg); border:1px solid var(--line);
  margin-bottom:18px; letter-spacing:2.5px; font-family:'Consolas',monospace; font-weight:700;
}
[data-theme="dark"] .section-tag { color:var(--cyan); border-color:rgba(0,229,255,0.2); }
.section-title { font-size:38px; font-weight:800; margin-bottom:16px; color:var(--text); }
.section-title span { color:var(--brand); }
[data-theme="dark"] .section-title span { color:var(--cyan); }
.section-desc { font-size:16px; color:var(--text-2); max-width:720px; margin:0 auto; }

/* ================= 关于我们 ================= */
.about-grid { display:grid; grid-template-columns:1.1fr 0.9fr; gap:56px; align-items:center; max-width:1200px; margin:0 auto; }
.about-text p { font-size:15.5px; color:var(--text-2); margin-bottom:18px; line-height:1.9; }
.about-text p strong { color:var(--text); font-weight:700; }
.about-text .hl { color:var(--brand); font-weight:700; }
[data-theme="dark"] .about-text .hl { color:var(--cyan); }
.about-highlights { display:grid; grid-template-columns:1fr 1fr; gap:14px; margin-top:28px; }
.about-highlight { padding:18px; border-radius:12px; background:var(--bg-card); border:1px solid var(--line); transition:all 0.3s; }
.about-highlight:hover { border-color:var(--card-hover-border); transform:translateY(-4px); box-shadow:var(--shadow); }
.about-highlight .icon { font-size:24px; margin-bottom:8px; }
.about-highlight .icon .layui-icon { font-size:22px; color:var(--brand); }
[data-theme="dark"] .about-highlight .icon .layui-icon { color:var(--cyan); }
#themeToggle .layui-icon { font-size:18px; }
.nav-toggle .layui-icon { font-size:20px; }
.about-highlight h4 { font-size:15px; margin-bottom:4px; color:var(--text); }
.about-highlight p { font-size:12.5px; color:var(--text-3); margin:0; }
.about-visual-card {
  background:var(--bg-card); border:1px solid var(--line); border-radius:18px;
  padding:30px 36px; box-shadow:var(--shadow); position:relative; overflow:hidden;
}
.about-visual-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:3px;
  background:linear-gradient(90deg,var(--brand),var(--cyan-bright));
}
/* 可验证事实卡 */
.fact-item { display:flex; gap:16px; align-items:flex-start; padding:17px 0; border-bottom:1px dashed var(--line); }
.fact-item:first-child { padding-top:8px; }
.fact-item:last-child { border-bottom:none; padding-bottom:8px; }
.fact-icon {
  width:46px; height:46px; border-radius:12px; background:var(--tag-bg);
  display:flex; align-items:center; justify-content:center; flex-shrink:0;
}
.fact-icon .layui-icon { font-size:22px; color:var(--brand); }
[data-theme="dark"] .fact-icon .layui-icon { color:var(--cyan); }
.fact-title { font-size:15.5px; font-weight:700; color:var(--text); margin-bottom:4px; }
.fact-desc { font-size:13px; color:var(--text-3); line-height:1.75; }
.fact-desc a { color:var(--brand); font-weight:600; text-decoration:none; }
.fact-desc a:hover { text-decoration:underline; }
[data-theme="dark"] .fact-desc a { color:var(--cyan); }

/* ================= 产品体系 ================= */
.products-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:26px; max-width:1200px; margin:0 auto; }
.product-card {
  background:var(--bg-card); border:1px solid var(--line); border-radius:16px;
  padding:36px 30px; position:relative; overflow:hidden; transition:all 0.35s; box-shadow:var(--shadow);
}
.product-card:hover { border-color:var(--card-hover-border); transform:translateY(-6px); box-shadow:var(--shadow-hover); }
.product-card .product-glow { position:absolute; top:-60px; right:-60px; width:170px; height:170px; border-radius:50%; opacity:0.12; filter:blur(45px); background:var(--brand); }
.product-card.p2 .product-glow { background:#7c4dff; }
.product-card.p3 .product-glow { background:var(--cyan-bright); }
.product-label { font-size:11.5px; color:var(--brand); font-family:'Consolas',monospace; letter-spacing:2px; margin-bottom:12px; font-weight:700; }
[data-theme="dark"] .product-label { color:var(--cyan); }
.product-card h3 { font-size:21px; margin-bottom:14px; color:var(--text); }
.product-card p { font-size:14px; color:var(--text-2); margin-bottom:18px; line-height:1.75; }
.product-features { list-style:none; }
.product-features li { font-size:13.5px; color:var(--text-2); padding:6px 0 6px 24px; position:relative; }
.product-features li::before {
  content:''; position:absolute; left:2px; top:13px; width:8px; height:8px; border-radius:2px;
  background:linear-gradient(135deg,var(--brand),var(--cyan-bright));
}

/* ===== 五大产品体系：图标 / 软著徽章 / 宽卡 / 差异化光晕 ===== */
.product-icon {
  width:54px; height:54px; border-radius:14px; display:flex; align-items:center; justify-content:center;
  background:var(--tag-bg); margin-bottom:18px; transition:all 0.3s;
}
.product-icon .layui-icon { font-size:27px; color:var(--brand); }
[data-theme="dark"] .product-icon .layui-icon { color:var(--cyan); }
.product-card:hover .product-icon { transform:scale(1.08) rotate(-4deg); }
.product-badge {
  display:inline-block; margin:-4px 0 14px; padding:4px 12px; border-radius:20px;
  font-size:11.5px; font-weight:600; letter-spacing:0.5px;
  background:var(--tag-bg); color:var(--brand); border:1px solid var(--line);
}
[data-theme="dark"] .product-badge { color:var(--cyan); }
.product-card.wide { grid-column:1 / -1; }
.product-card.p4 .product-glow { background:#00c896; }
.product-card.p5 .product-glow { background:#ff7a45; }
.product-demo {
  display:inline-flex; align-items:center; gap:6px; margin-top:20px;
  font-size:13.5px; font-weight:700; color:var(--brand); text-decoration:none;
  padding:9px 20px; border-radius:8px; background:var(--tag-bg);
  border:1px solid var(--line); transition:all 0.3s;
}
.product-demo:hover { gap:10px; border-color:var(--brand); box-shadow:var(--shadow); }
[data-theme="dark"] .product-demo { color:var(--cyan); }
[data-theme="dark"] .product-demo:hover { border-color:var(--cyan); }
.product-demo .layui-icon { font-size:14px; }

/* ================= 成功案例 ================= */
.case-filter { display:flex; justify-content:center; gap:10px; margin-bottom:42px; flex-wrap:wrap; }
.case-filter-btn {
  padding:8px 24px; border-radius:20px; border:1.5px solid var(--line);
  background:var(--bg-card); color:var(--text-2); font-size:14px; cursor:pointer; transition:all 0.25s;
}
.case-filter-btn.active, .case-filter-btn:hover { background:var(--tag-bg); border-color:var(--brand); color:var(--brand); }
[data-theme="dark"] .case-filter-btn.active, [data-theme="dark"] .case-filter-btn:hover { border-color:var(--cyan); color:var(--cyan); }
.cases-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:22px; max-width:1200px; margin:0 auto; }
.case-card {
  background:var(--bg-card); border:1px solid var(--line); border-radius:14px;
  overflow:hidden; transition:all 0.35s; cursor:pointer; box-shadow:var(--shadow);
}
.case-card:hover { border-color:var(--card-hover-border); transform:translateY(-6px); box-shadow:var(--shadow-hover); }
.case-visual { position:relative; overflow:hidden; display:flex; align-items:center; justify-content:center; aspect-ratio:16/9; height:auto; }
/* 真实案例截图：铺满 16:9 容器，hover 轻微放大；无截图的卡片继续显示色块占位 */
.case-img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; display:block; z-index:1; transition:transform 0.5s ease; }
.case-card:hover .case-img { transform:scale(1.04); }
.case-visual.c1 { background:linear-gradient(135deg,#e8f1fe,#c9ddfb); }
.case-visual.c2 { background:linear-gradient(135deg,#ece7fb,#d3c6f7); }
.case-visual.c3 { background:linear-gradient(135deg,#e4f7ef,#c3ecd8); }
.case-visual.c4 { background:linear-gradient(135deg,#fdf0e3,#f7d9bc); }
[data-theme="dark"] .case-visual.c1 { background:linear-gradient(135deg,#10264a,#1b3a6b); }
[data-theme="dark"] .case-visual.c2 { background:linear-gradient(135deg,#231545,#3d2470); }
[data-theme="dark"] .case-visual.c3 { background:linear-gradient(135deg,#0f3324,#1b5c3d); }
[data-theme="dark"] .case-visual.c4 { background:linear-gradient(135deg,#3a2410,#6b4520); }
.case-pattern {
  position:absolute; inset:0; z-index:0;
  background-image:linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size:22px 22px;
}
.case-visual .case-icon { font-size:42px; z-index:0; opacity:0.9; }
.case-visual .case-type {
  position:absolute; top:12px; right:12px; font-size:11px; padding:3px 12px; border-radius:20px;
  background:var(--bg-card); color:var(--brand); z-index:2; font-weight:600; box-shadow:var(--shadow);
}
[data-theme="dark"] .case-visual .case-type { color:var(--cyan); }
.case-info { padding:20px 22px; }
.case-info h4 { font-size:15.5px; margin-bottom:6px; color:var(--text); }
.case-info p { font-size:13px; color:var(--text-3); }

/* ================= 联系我们 ================= */
.contact-grid { display:grid; grid-template-columns:1fr; max-width:720px; margin:0 auto; }
.contact-info h3 { font-size:26px; margin-bottom:18px; color:var(--text); }
.contact-info > p { font-size:15px; color:var(--text-2); margin-bottom:28px; line-height:1.85; }
.contact-items { list-style:none; }
.contact-items li { display:flex; align-items:flex-start; gap:14px; margin-bottom:20px; }
.ci-icon {
  width:42px; height:42px; border-radius:10px; background:var(--tag-bg);
  display:flex; align-items:center; justify-content:center; font-size:19px; flex-shrink:0; color:var(--brand);
}
.ci-icon .layui-icon { font-size:19px; }
[data-theme="dark"] .ci-icon { color:var(--cyan); }
.ci-label { font-size:12px; color:var(--text-3); }
.ci-value { font-size:14.5px; color:var(--text); font-weight:600; }
/* 微信二维码：hover 显示 */
.contact-wechat { position:relative; display:inline-block; margin-top:26px; }
.wechat-trigger {
  display:inline-flex; align-items:center; gap:10px; cursor:pointer;
  padding:13px 30px; border-radius:10px; text-decoration:none;
  background:linear-gradient(135deg,#07c160,#05a050); color:#fff;
  font-size:15px; font-weight:700; box-shadow:0 8px 24px rgba(7,193,96,0.25);
  transition:all 0.3s; border:none;
}
.wechat-trigger:hover { transform:translateY(-2px); opacity:0.94; color:#fff; }
.wechat-trigger .layui-icon { font-size:20px; }
.wechat-qrcode {
  position:absolute; bottom:calc(100% + 14px); left:50%; transform:translateX(-50%) translateY(10px);
  width:360px; padding:16px; background:#fff; border-radius:14px;
  box-shadow:0 16px 48px rgba(0,0,0,0.18);
  display:flex; gap:16px; justify-content:center; align-items:flex-start;
  opacity:0; visibility:hidden; transition:opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease; z-index:50;
}
.wechat-qrcode::after {
  content:''; position:absolute; top:100%; left:50%; transform:translateX(-50%);
  border:9px solid transparent; border-top-color:#fff;
}
.qr-item { width:160px; flex-shrink:0; text-align:center; }
.wechat-qrcode img { width:160px; height:160px; object-fit:contain; border-radius:8px; display:block; }
.wechat-qrcode .qr-text { font-size:12.5px; color:#333; margin-top:8px; font-weight:600; }
.contact-wechat:hover .wechat-qrcode { opacity:1; visibility:visible; transform:translateX(-50%) translateY(0); }

/* ================= Footer ================= */
.footer { padding:56px 5% 30px; background:var(--bg-soft); border-top:1px solid var(--line); }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; max-width:1200px; margin:0 auto; }
.footer-brand p { font-size:13.5px; color:var(--text-3); line-height:1.8; max-width:320px; margin-top:14px; }
.footer-col h5 { font-size:15px; margin-bottom:16px; color:var(--text); }
.footer-col ul { list-style:none; }
.footer-col ul li { margin-bottom:3px; }
.footer-col ul li a { font-size:13.5px; color:var(--text-3); text-decoration:none; transition:color 0.25s; }
.footer-col ul li a:hover { color:var(--brand); }
[data-theme="dark"] .footer-col ul li a:hover { color:var(--cyan); }
.footer-bottom { max-width:1200px; margin:40px auto 0; padding-top:24px; border-top:1px solid var(--line-soft); text-align:center; font-size:13px; color:var(--text-3); line-height:1.8; }

/* ================= 动画 ================= */
.fade-in { opacity:0; transform:translateY(36px); transition:all 0.75s ease; }
.fade-in.visible { opacity:1; transform:translateY(0); }
@keyframes fadeIn { from { opacity:0; transform:translateY(12px);} to { opacity:1; transform:translateY(0);} }

/* ================= 响应式 ================= */
@media (max-width:968px) {
  .nav-menu {
    display:none; position:absolute; top:100%; left:0; right:0; flex-direction:column;
    background:var(--bg-nav); backdrop-filter:blur(20px); padding:18px; gap:6px;
    border-bottom:1px solid var(--line); align-items:stretch;
  }
  .nav-menu.open { display:flex; }
  .nav-toggle { display:flex; }
  .nav-cta { display:none; }
  .hero h1 { font-size:38px; }
  .hero h1 .highlight { font-size:46px; }
  .hero-subtitle { font-size:16px; }
  .hero-stats { gap:30px; }
  .section-title { font-size:28px; }
  .cases-grid, .products-grid { grid-template-columns:1fr; }
  .about-grid { grid-template-columns:1fr; gap:40px; }
  .about-highlights { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr 1fr; }
  /* 移动端：二维码常驻、整体居中，禁用 hover 位移避免点击时滑动 */
  .contact-wechat { display:block; text-align:center; margin-top:26px; }
  .wechat-qrcode {
    position:static; transform:none !important; opacity:1; visibility:visible;
    width:auto; max-width:360px; margin:0 auto; padding:14px;
    background:var(--bg-card); box-shadow:none; border:1px solid var(--line);
    flex-wrap:wrap; gap:18px; margin-bottom:16px;
  }
  .contact-wechat:hover .wechat-qrcode { transform:none !important; }
  .wechat-qrcode::after { display:none; }
  .wechat-trigger { margin:0 auto; }
  .wechat-trigger:hover { transform:none; }
}
@media (max-width:480px) {
  .hero h1 { font-size:30px; }
  .hero h1 .highlight { font-size:36px; }
  .hero-stat .num { font-size:30px; }
  .footer-grid { grid-template-columns:1fr; }
}