/* ============================================================
   达尊智能装备 - styles.css
   Dark Tech Industrial Theme
============================================================ */
:root {
  --bg: #f5f8fc;
  --bg2: #ffffff;
  --bg3: #ffffff;
  --bg4: #edf2f9;
  --b: #0088cc;
  --bd: #006ba6;
  --g: #e8920d;
  --tx: #1a2b42;
  --tx2: #5a6e85;
  --tx3: #94a3b8;
  --bd2: rgba(0,136,204,.10);
  --bda: rgba(0,136,204,.35);
  --gb: 0 0 20px rgba(0,136,204,.12);
  --fd: "Orbitron", "Noto Sans SC", sans-serif; /* English tech headings — SIL OFL free */
  --fb: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif; /* Chinese body — SIL OFL free */
  --sp: clamp(80px,10vw,130px);
  --mx: 1280px;
  --r: 6px;
  --t: .35s cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--fb); background: var(--bg); color: var(--tx); overflow-x: hidden; -webkit-font-smoothing: antialiased; }
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--b); border-radius: 3px; }
::selection { background: var(--b); color: #fff; }
a { color: inherit; text-decoration: none; }
button { border: none; outline: none; font-family: inherit; cursor: pointer; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
.c { max-width: var(--mx); margin: 0 auto; padding: 0 clamp(20px,5vw,60px); }

/* ── Animations ── */
@keyframes fu { from { opacity:0; transform:translateY(40px); } to { opacity:1; transform:translateY(0); } }
@keyframes pg { 0%,100% { box-shadow:0 0 15px rgba(0,180,255,.15); } 50% { box-shadow:0 0 35px rgba(0,180,255,.4); } }
@keyframes fl { 0%,100% { transform:translateY(0); } 50% { transform:translateY(-10px); } }
@keyframes mq { to { transform:translateX(-50%); } }
@keyframes sd { 0% { transform:translateY(-100%); } 100% { transform:translateY(100vh); } }
@keyframes spin { to { transform:rotate(360deg); } }
.rv { opacity:0; transform:translateY(30px); transition:opacity .7s,transform .7s; }
.rv.v { opacity:1; transform:translateY(0); }

/* ── Navbar ── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: 72px; display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(20px,5vw,60px);
  background: rgba(255,255,255,.92); backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--bd2); transition: var(--t);
}
.nav.s { background: rgba(255,255,255,.98); border-bottom-color: var(--bda); height: 64px; box-shadow: 0 2px 20px rgba(0,0,0,.06); }
.logo { display:flex; align-items:center; gap:12px; font-family:var(--fd); font-size:1.1rem; font-weight:700; }
.lg { width:36px; height:36px; border-radius:var(--r); background:linear-gradient(135deg,var(--b),var(--g)); display:flex; align-items:center; justify-content:center; font-size:.9rem; font-weight:900; color:#fff; box-shadow:0 4px 12px rgba(0,136,204,.25); }
.logo-img { height:32px; width:auto; border-radius:var(--r); }
.footer-logo { margin-bottom:14px; }
.logo span { color:var(--b); }
.nl { display:flex; align-items:center; gap:28px; }
.nl a { font-size:.85rem; font-weight:500; color:var(--tx2); transition:var(--t); position:relative; }
.nl a::after { content:""; position:absolute; bottom:-4px; left:0; width:0; height:2px; background:var(--b); transition:var(--t); }
.nl a:hover { color:var(--b); }
.nl a:hover::after { width:100%; }
.ncta { padding:8px 20px; background:var(--b); border:none; color:#fff!important; border-radius:var(--r); font-size:.82rem!important; font-weight:600!important; letter-spacing:.08em!important; transition:var(--t)!important; box-shadow:0 4px 12px rgba(0,136,204,.25); }
.ncta:hover { background:var(--bd)!important; transform:translateY(-1px); box-shadow:0 6px 18px rgba(0,136,204,.35)!important; }
.ncta::after { display:none!important; }
.hbg { display:none; flex-direction:column; gap:5px; background:0; padding:4px; }
.hbg span { display:block; width:22px; height:2px; background:var(--tx); border-radius:1px; transition:var(--t); }
.hbg.open span:nth-child(1) { transform:rotate(45deg) translate(5px,5px); }
.hbg.open span:nth-child(2) { opacity:0; }
.hbg.open span:nth-child(3) { transform:rotate(-45deg) translate(5px,-5px); }

/* ── Hero ── */
.hero { position:relative; min-height:100vh; display:flex; align-items:center; overflow:hidden; padding-top:72px; }
.hero-bg { position:absolute; inset:0; background:linear-gradient(160deg,#e8f4fd 0%,#f5f8fc 40%,#fff 100%); }
.hero-grid { position:absolute; inset:0; background-image:linear-gradient(rgba(0,136,204,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(0,136,204,.06) 1px,transparent 1px); background-size:60px 60px; mask-image:radial-gradient(ellipse 70% 70% at 50% 50%,black 0%,transparent 80%); }
.hero-content { position:relative; z-index:2; width:100%; max-width:var(--mx); margin:0 auto; padding:0 clamp(20px,5vw,60px); display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; }
.hero-left { animation:fu .9s ease .2s both; }
.hero-badge { display:inline-flex; align-items:center; gap:8px; padding:5px 14px; margin-bottom:28px; background:rgba(0,136,204,.08); border:1px solid rgba(0,136,204,.2); border-radius:30px; font-size:.68rem; color:var(--b); letter-spacing:.1em; }
.badge-dot { width:6px; height:6px; border-radius:50%; background:var(--b); animation:pg 2s ease infinite; }
.hero-title { font-family:var(--fd); font-size:clamp(2.2rem,4.5vw,3.8rem); font-weight:900; line-height:1.1; letter-spacing:-.03em; margin-bottom:24px; }
.hl2 { color:var(--b); display:block; }
.hl3 { color:var(--tx3); font-size:.5em; font-weight:600; letter-spacing:.15em; display:block; margin-top:10px; } { font-size:1rem; line-height:1.8; color:var(--tx2); margin-bottom:38px; max-width:460px; }
.hero-actions { display:flex; gap:14px; flex-wrap:wrap; }
.btn-p { padding:13px 30px; background:linear-gradient(135deg,var(--b),var(--bd)); color:#fff; font-weight:700; font-size:.88rem; letter-spacing:.06em; border-radius:var(--r); transition:var(--t); display:inline-flex; align-items:center; gap:8px; box-shadow:0 4px 16px rgba(0,136,204,.25); }
.btn-p:hover { transform:translateY(-2px); box-shadow:0 8px 28px rgba(0,136,204,.35); }
.btn-o { padding:13px 30px; background:#fff; border:1px solid var(--bda); color:var(--b); font-weight:600; font-size:.88rem; letter-spacing:.06em; border-radius:var(--r); transition:var(--t); display:inline-flex; align-items:center; gap:8px; }
.btn-o:hover { border-color:var(--b); background:rgba(0,136,204,.04); }
.hero-stats { margin-top:48px; padding-top:32px; border-top:1px solid var(--bd2); display:grid; grid-template-columns:repeat(3,1fr); gap:24px; animation:fu .9s ease .8s both; }
.hstat-n { font-family:var(--fd); font-size:clamp(1.5rem,2.2vw,2rem); font-weight:900; color:var(--b); line-height:1; }
.nu { font-size:.6em; color:var(--g); }
.hstat-l { font-size:.78rem; color:var(--tx3); margin-top:6px; letter-spacing:.05em; }
.hero-right { position:relative; animation:fu .9s ease .5s both; }
.hero-visual { position:relative; width:100%; aspect-ratio:1; max-width:480px; margin:0 auto; }
.h-ring { position:absolute; border-radius:50%; border:1px solid; animation:fl linear infinite; }
.r1 { inset:0; border-color:rgba(0,136,204,.15); animation-duration:30s; }
.r2 { inset:-12%; border-color:rgba(0,136,204,.08); animation-duration:45s; animation-direction:reverse; }
.r3 { inset:12%; border-color:rgba(0,136,204,.20); animation-duration:20s; }
.h-center { position:absolute; inset:18%; border-radius:50%; background:linear-gradient(135deg,rgba(0,136,204,.10),rgba(0,136,204,.04)); border:1px solid rgba(0,136,204,.25); display:flex; align-items:center; justify-content:center; backdrop-filter:blur(8px); animation:pg 3s ease infinite; box-shadow:0 8px 32px rgba(0,136,204,.15); }
.h-center svg { width:50%; height:50%; opacity:.7; }

/* ── Business Entry ── */
.biz-entry { padding:0; background:#fff; border-top:1px solid var(--bd2); border-bottom:1px solid var(--bd2); box-shadow:0 2px 12px rgba(0,0,0,.04); }
.biz-grid { display:grid; grid-template-columns:repeat(4,1fr); }
.biz-card { display:flex; flex-direction:column; align-items:center; padding:28px 20px; text-align:center; border-right:1px solid var(--bd2); transition:var(--t); cursor:pointer; background:#fff; }
.biz-card:last-child { border-right:none; }
.biz-card:hover { background:rgba(0,136,204,.04); }
.biz-icon { font-size:2rem; margin-bottom:12px; }
.biz-title { font-family:var(--fd); font-size:.85rem; font-weight:700; margin-bottom:6px; color:var(--tx); }
.biz-desc { font-size:.75rem; color:var(--tx3); }

/* ── Sections ── */
.section { padding:var(--sp) 0; }
.bg-alt { background:#fff; }
.section-header { text-align:center; margin-bottom:56px; }
.sll { font-size:.7rem; letter-spacing:.25em; text-transform:uppercase; color:var(--b); margin-bottom:14px; display:flex; align-items:center; justify-content:center; gap:12px; }
.sll::before, .sll::after { content:""; display:block; width:28px; height:1px; background:var(--b); }
.stt { font-family:var(--fd); font-size:clamp(1.6rem,3vw,2.5rem); font-weight:700; line-height:1.15; letter-spacing:-.02em; margin-bottom:16px; }
.sdd { font-size:1rem; line-height:1.75; color:var(--tx2); max-width:520px; margin:0 auto; }

/* ── Products ── */
.prod-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.prod-card { background:#fff; border:1px solid rgba(0,136,204,.08); border-radius:10px; overflow:hidden; transition:var(--t); box-shadow:0 2px 8px rgba(0,0,0,.04); }
.prod-card:hover { border-color:var(--bda); transform:translateY(-6px); box-shadow:0 16px 48px rgba(0,136,204,.12); }
.prod-img { height:180px; position:relative; overflow:hidden; background:linear-gradient(135deg,rgba(0,136,204,.05),rgba(0,136,204,.02)); display:flex; align-items:center; justify-content:center; }
.prod-img::after { content:""; position:absolute; inset:0; background:linear-gradient(to bottom,transparent 50%,#fff); }
.prod-icon { font-size:3.5rem; opacity:.35; filter:drop-shadow(0 0 18px rgba(0,136,204,.2)); }
.prod-img-inner { width:100%; height:100%; object-fit:cover; position:relative; z-index:1; }
.prod-body { padding:22px; }
.prod-tag { display:inline-block; font-size:.62rem; letter-spacing:.15em; text-transform:uppercase; color:var(--b); background:rgba(0,136,204,.07); border:1px solid rgba(0,136,204,.18); padding:3px 10px; border-radius:20px; margin-bottom:10px; }
.prod-title { font-size:1.05rem; font-weight:700; margin-bottom:8px; }
.prod-desc { font-size:.82rem; color:var(--tx2); line-height:1.6; margin-bottom:14px; }
.prod-link { font-size:.8rem; color:var(--b); display:inline-flex; align-items:center; gap:5px; font-weight:600; transition:var(--t); }
.prod-link:hover { gap:9px; color:var(--g); }

/* ── Services ── */
.service-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.service-card { background:#fff; border:1px solid rgba(0,136,204,.08); border-radius:10px; padding:32px 28px; transition:var(--t); position:relative; overflow:hidden; box-shadow:0 2px 8px rgba(0,0,0,.04); }
.service-card::before { content:""; position:absolute; top:0; left:0; right:0; height:3px; background:linear-gradient(90deg,var(--b),var(--g)); opacity:0; transition:var(--t); }
.service-card:hover { border-color:var(--bda); transform:translateY(-4px); box-shadow:0 12px 36px rgba(0,136,204,.1); }
.service-card:hover::before { opacity:1; }
.service-icon { font-size:2.5rem; margin-bottom:16px; }
.service-icon .service-img { width:48px; height:48px; border-radius:10px; object-fit:cover; }
.service-title { font-family:var(--fd); font-size:1rem; font-weight:700; margin-bottom:12px; }
.service-desc { font-size:.85rem; color:var(--tx2); line-height:1.7; margin-bottom:20px; }
.service-list { display:flex; flex-direction:column; gap:8px; }
.service-list li { font-size:.82rem; color:var(--tx3); padding-left:16px; position:relative; }
.service-list li::before { content:"▸"; position:absolute; left:0; color:var(--b); }

/* ── Cases ── */
.cases-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.case-card { background:#fff; border:1px solid rgba(0,136,204,.08); border-radius:10px; overflow:hidden; transition:var(--t); box-shadow:0 2px 8px rgba(0,0,0,.04); }
.case-card:hover { border-color:var(--bda); transform:translateY(-4px); box-shadow:0 12px 36px rgba(0,136,204,.1); }
.case-img { height:160px; background:linear-gradient(135deg,rgba(0,136,204,.05),rgba(0,136,204,.02)); display:flex; align-items:center; justify-content:center; position:relative; }
.case-img::after { content:""; position:absolute; inset:0; background:linear-gradient(to bottom,transparent 50%,#fff); }
.case-icon { font-size:3rem; opacity:.4; }
.case-img-inner { width:100%; height:100%; object-fit:cover; position:relative; z-index:1; }
.case-body { padding:22px; }
.case-tag { display:inline-block; font-size:.62rem; letter-spacing:.12em; text-transform:uppercase; color:var(--g); background:rgba(240,165,0,.08); border:1px solid rgba(240,165,0,.3); padding:3px 10px; border-radius:20px; margin-bottom:10px; }
.case-title { font-size:1rem; font-weight:700; margin-bottom:8px; }
.case-desc { font-size:.82rem; color:var(--tx2); line-height:1.6; }
.more-card { display:flex; align-items:center; justify-content:center; min-height:280px; background:linear-gradient(135deg,rgba(0,136,204,.04),rgba(0,136,204,.01)); }
.more-card .case-body { text-align:center; }
.case-icon-lg { font-size:3rem; margin-bottom:16px; opacity:.5; }
.more-card .case-title { font-size:1.1rem; margin-bottom:12px; }
.more-card .case-desc { margin-bottom:24px; }

/* ── About ── */
.about-grid { display:grid; grid-template-columns:1fr 1fr; gap:80px; align-items:start; }
.about-intro { margin-bottom:36px; }
.about-intro p { font-size:.92rem; color:var(--tx2); line-height:1.8; margin-bottom:14px; }
.timeline { position:relative; padding-left:24px; }
.timeline::before { content:""; position:absolute; left:0; top:8px; bottom:8px; width:2px; background:linear-gradient(to bottom,var(--b),rgba(0,136,204,.1)); }
.tl-item { display:flex; gap:20px; margin-bottom:28px; position:relative; }
.tl-item::before { content:""; position:absolute; left:-29px; top:6px; width:10px; height:10px; border-radius:50%; background:var(--b); box-shadow:0 0 12px rgba(0,136,204,.4); border:2px solid #fff; }
.tl-year { font-family:var(--fd); font-size:.75rem; font-weight:700; color:var(--b); letter-spacing:.05em; white-space:nowrap; padding-top:2px; min-width:36px; }
.tl-title { font-size:.9rem; font-weight:700; margin-bottom:4px; }
.tl-desc { font-size:.78rem; color:var(--tx3); line-height:1.5; }
.about-stats-box { display:grid; grid-template-columns:repeat(2,1fr); gap:16px; margin-bottom:24px; }
.ab-stat { background:#fff; border:1px solid rgba(0,136,204,.08); border-radius:10px; padding:20px; text-align:center; transition:var(--t); box-shadow:0 2px 8px rgba(0,0,0,.04); }
.ab-stat:hover { border-color:var(--bda); box-shadow:0 8px 24px rgba(0,136,204,.1); }
.ab-num { font-family:var(--fd); font-size:1.8rem; font-weight:900; color:var(--b); line-height:1; }
.ab-num span { font-size:.6em; color:var(--g); }
.ab-label { font-size:.78rem; color:var(--tx3); margin-top:6px; }
.cert-box { background:#fff; border:1px solid rgba(0,136,204,.08); border-radius:10px; padding:24px; box-shadow:0 2px 8px rgba(0,0,0,.04); }
.cert-title { font-weight:700; font-size:.9rem; margin-bottom:14px; color:var(--tx); }
.cert-list { display:flex; flex-direction:column; gap:10px; }
.cert-item { font-size:.82rem; color:var(--tx2); display:flex; align-items:center; gap:8px; }

/* ── Contact ── */
.contact-grid { display:grid; grid-template-columns:1fr 1.4fr; gap:60px; }
.contact-info { display:flex; flex-direction:column; gap:0; }
.ci-item { display:flex; gap:16px; align-items:flex-start; padding:18px 0; border-bottom:1px solid var(--bd2); }
.ci-icon { font-size:1.2rem; color:var(--b); flex-shrink:0; margin-top:2px; }
.ci-label { font-size:.75rem; color:var(--tx3); letter-spacing:.05em; margin-bottom:4px; }
.ci-val { font-size:.9rem; color:var(--tx); font-weight:500; }
.wechat-box { margin-top:24px; background:#fff; border:1px solid rgba(0,136,204,.08); border-radius:10px; padding:20px; text-align:center; box-shadow:0 2px 8px rgba(0,0,0,.04); }
.wechat-title { font-size:.85rem; font-weight:600; margin-bottom:14px; color:var(--tx2); }
.qr-placeholder { width:120px; height:120px; margin:0 auto; background:rgba(0,136,204,.03); border:1px dashed rgba(0,136,204,.25); border-radius:8px; display:flex; align-items:center; justify-content:center; }
.qr-img { width:120px; height:120px; border-radius:8px; object-fit:contain; }
.qr-inner { font-size:.72rem; color:var(--tx3); text-align:center; }
.contact-form { background:#fff; border:1px solid rgba(0,136,204,.08); border-radius:10px; padding:36px; box-shadow:0 2px 12px rgba(0,0,0,.04); }
.form-title { font-family:var(--fd); font-size:1rem; font-weight:700; margin-bottom:24px; color:var(--tx); }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.fg { margin-bottom:16px; }
.flbl { font-size:.82rem; color:var(--tx2); margin-bottom:8px; display:block; letter-spacing:.05em; }
.fi { width:100%; padding:12px 16px; background:var(--bg); border:1px solid rgba(0,136,204,.12); border-radius:var(--r); color:var(--tx); font-family:var(--fb); font-size:.88rem; transition:var(--t); outline:none; }
.fi:focus { border-color:var(--b); background:#fff; box-shadow:0 0 0 3px rgba(0,136,204,.1); }
.fta { width:100%; padding:12px 16px; background:var(--bg); border:1px solid rgba(0,136,204,.12); border-radius:var(--r); color:var(--tx); font-family:var(--fb); font-size:.88rem; transition:var(--t); outline:none; resize:vertical; min-height:110px; }
.fta:focus { border-color:var(--b); background:#fff; box-shadow:0 0 0 3px rgba(0,136,204,.1); }
.fsb { width:100%; padding:14px; background:linear-gradient(135deg,var(--b),var(--bd)); color:#fff; font-weight:700; font-size:.92rem; letter-spacing:.08em; border-radius:var(--r); transition:var(--t); box-shadow:0 4px 16px rgba(0,136,204,.25); margin-top:4px; }
.fsb:hover { transform:translateY(-2px); box-shadow:0 8px 28px rgba(0,136,204,.35); }

/* ── Footer ── */
.footer { padding:56px 0 28px; background:var(--tx); border-top:1px solid rgba(255,255,255,.06); }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1.2fr; gap:44px; margin-bottom:44px; }
.footer-desc { font-size:.82rem; color:rgba(255,255,255,.5); line-height:1.7; margin-top:14px; max-width:260px; }
.footer-social { display:flex; gap:10px; margin-top:16px; }
.social-btn { width:34px; height:34px; border-radius:var(--r); background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.1); display:flex; align-items:center; justify-content:center; font-size:.9rem; transition:var(--t); color:rgba(255,255,255,.7); }
.social-btn:hover { border-color:var(--b); background:rgba(0,136,204,.15); color:#fff; }
.footer-col-title { font-weight:700; font-size:.88rem; margin-bottom:14px; color:rgba(255,255,255,.9); letter-spacing:.04em; }
.footer-links { display:flex; flex-direction:column; gap:10px; }
.footer-links a { font-size:.8rem; color:rgba(255,255,255,.5); transition:var(--t); }
.footer-links a:hover { color:var(--b); }
.footer-bottom { padding-top:24px; border-top:1px solid rgba(255,255,255,.08); display:flex; align-items:center; justify-content:space-between; font-size:.75rem; color:rgba(255,255,255,.35); }
.footer-bottom a { color:rgba(255,255,255,.35); transition:var(--t); }
.footer-bottom a:hover { color:var(--b); }

/* ── Toast ── */
.toast { position:fixed; bottom:30px; right:30px; z-index:9999; background:#fff; border:1px solid var(--b); border-radius:10px; padding:14px 20px; font-size:.88rem; color:var(--tx); box-shadow:0 8px 32px rgba(0,136,204,.15); transform:translateY(20px); opacity:0; transition:var(--t); pointer-events:none; }
.toast.show { transform:translateY(0); opacity:1; }

/* ── Responsive ── */
@media(max-width:1100px) {
  .about-grid { grid-template-columns:1fr; gap:48px; }
  .contact-grid { grid-template-columns:1fr; gap:40px; }
}
@media(max-width:900px) {
  .nl { display:none; }
  .hbg { display:flex; }
  .nl.o { display:flex; flex-direction:column; position:fixed; top:72px; left:0; right:0; background:rgba(255,255,255,.99); padding:30px 20px; border-bottom:1px solid var(--bd2); gap:22px; box-shadow:0 8px 24px rgba(0,0,0,.08); }
  .nl.o a { font-size:1.05rem; }
  .hero-content { grid-template-columns:1fr; text-align:center; }
  .hero-right { display:none; }
  .hero-desc { margin:0 auto 36px; }
  .hero-actions { justify-content:center; }
  .hero-stats { grid-template-columns:repeat(3,1fr); }
  .biz-grid { grid-template-columns:repeat(2,1fr); }
  .biz-card { border-right:none; border-bottom:1px solid var(--bd2); }
  .biz-card:nth-child(odd) { border-right:1px solid var(--bd2); }
  .prod-grid { grid-template-columns:1fr; max-width:480px; margin:0 auto; }
  .service-grid { grid-template-columns:1fr; max-width:480px; margin:0 auto; }
  .cases-grid { grid-template-columns:1fr; max-width:480px; margin:0 auto; }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .footer-bottom { flex-direction:column; gap:10px; text-align:center; }
  .form-row { grid-template-columns:1fr; }
}
@media(max-width:600px) {
  .biz-grid { grid-template-columns:1fr; }
  .biz-card { border-right:none; }
  .biz-card:nth-child(odd) { border-right:none; }
  .footer-grid { grid-template-columns:1fr; }
  .about-stats-box { grid-template-columns:repeat(2,1fr); }
}