:root{
  --bg:#f7f9fc; --bg-soft:#eef3fb; --ink:#0f1b2d; --muted:#5b6b82;
  --brand:#2563eb; --brand2:#06b6d4; --line:#e3e9f2; --card:#ffffff;
  --radius:16px; --shadow:0 10px 30px rgba(20,40,80,.08);
  --ok:#0f9d6b; --warn:#d9920a; --nav-h:64px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background-color:var(--bg);
  background-image:radial-gradient(circle at 1px 1px, rgba(37,99,235,.09) 1px, transparent 0);
  background-size:22px 22px;
  color:var(--ink);line-height:1.65;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img,video{max-width:100%}
.wrap{width:min(1120px,92vw);margin:0 auto}
.btn{display:inline-block;padding:12px 22px;border-radius:999px;font-weight:600;font-size:15px;
  background:linear-gradient(120deg,var(--brand),var(--brand2));color:#fff;box-shadow:var(--shadow);
  transition:transform .15s ease,box-shadow .15s ease;cursor:pointer;border:0;text-align:center}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 36px rgba(37,99,235,.30),0 0 22px rgba(6,182,212,.32)}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--line);box-shadow:none}
.btn.ghost:hover{border-color:var(--brand)}
.btn.lg{padding:15px 32px;font-size:16.5px}
.btn.sm{padding:9px 16px;font-size:13.5px}

/* ===== TOP NAV (fixed) ===== */
header{position:sticky;top:0;z-index:50;background:rgba(247,249,252,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
nav{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h)}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.5px}
.logo .dot{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand2));
  display:grid;place-items:center;color:#fff;font-size:15px;box-shadow:0 0 14px rgba(6,182,212,.45)}
.nav-links{display:flex;gap:22px;font-size:15px;color:var(--muted);font-weight:600;flex-wrap:wrap}
.nav-links a:hover{color:var(--brand)}
.nav-links a.active{color:var(--brand)}
.nav-cta{margin-left:8px}
.menu-btn{display:none;font-size:22px;background:none;border:0;cursor:pointer;color:var(--ink)}

/* ===== PAGE HERO (inner pages) ===== */
.hero{position:relative;padding:88px 0 52px;background:
  radial-gradient(620px 320px at 50% -8%,rgba(6,182,212,.28),transparent 62%),
  radial-gradient(900px 440px at 88% -10%,rgba(6,182,212,.22),transparent 60%),
  radial-gradient(700px 380px at 4% 12%,rgba(37,99,235,.20),transparent 55%),
  radial-gradient(circle at 1px 1px, rgba(37,99,235,.07) 1px, transparent 0);
  background-size:auto,auto,auto,22px 22px;}
.home-hero{padding:108px 0 64px}
.hero h1{font-size:clamp(28px,5vw,46px);line-height:1.25;font-weight:800;letter-spacing:.5px}
.hero h1 .hl{background:linear-gradient(120deg,var(--brand),var(--brand2));-webkit-background-clip:text;
  background-clip:text;color:transparent}
.hero p.lead{margin-top:18px;font-size:clamp(16px,2vw,19px);color:var(--muted);max-width:680px}
.hero .cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.breadcrumb{font-size:13.5px;color:var(--muted);margin-bottom:18px}
.breadcrumb a:hover{color:var(--brand)}

/* ===== SECTION ===== */
section{padding:60px 0}
.sec-head{text-align:center;max-width:760px;margin:0 auto 40px}
.sec-head .tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:2px;color:var(--brand);text-transform:uppercase;
  padding:5px 14px;border:1px solid rgba(37,99,235,.25);border-radius:999px;background:rgba(37,99,235,.06);box-shadow:0 0 18px rgba(37,99,235,.12)}
.sec-head h2{font-size:clamp(24px,3.6vw,34px);margin-top:8px;font-weight:800}
.sec-head p{margin-top:12px;color:var(--muted)}
.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow);transition:transform .2s ease,border-color .2s ease}
.card:hover{transform:translateY(-4px);border-color:var(--brand);
  box-shadow:0 18px 44px rgba(20,40,80,.12),0 0 0 1px rgba(37,99,235,.30),0 0 26px rgba(6,182,212,.18)}

/* 卡片科技描边：蓝青渐变光边，静止可见、hover 增强 */
.card,.case-card,.step,.u-card,.gal-card,.doc-card,.demo-card,.focus .pillar{position:relative}
.card::after,.case-card::after,.step::after,.u-card::after,.gal-card::after,.doc-card::after,.demo-card::after,.focus .pillar::after{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;pointer-events:none;
  background:linear-gradient(135deg, rgba(37,99,235,.55), rgba(6,182,212,.55));
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  opacity:.35;transition:opacity .2s ease}
.card:hover::after,.case-card:hover::after,.step:hover::after,.u-card:hover::after,.gal-card:hover::after,.doc-card:hover::after,.demo-card:hover::after,.focus .pillar:hover::after{opacity:1}
.card .ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:22px;
  background:linear-gradient(135deg,#eaf1ff,#e6fbff);margin-bottom:14px}
.card h3{font-size:18px;font-weight:700}
.card p{margin-top:8px;color:var(--muted);font-size:14.5px}

/* FOCUS pillars (homepage) */
.focus{background:
  linear-gradient(180deg,#0f1b2d,#13243f),
  radial-gradient(circle at 1px 1px, rgba(124,198,255,.07) 1px, transparent 0);
  background-size:auto,26px 26px;color:#eaf1ff}
.focus .sec-head .tag{color:#7cc6ff}
.focus .sec-head h2{color:#fff}
.focus .sec-head p{color:#aab8d4}
.focus .one-liner{font-size:clamp(19px,3vw,26px);font-weight:700;text-align:center;max-width:880px;margin:0 auto 12px;line-height:1.6}
.focus .one-liner b{background:linear-gradient(120deg,#7cc6ff,#6ee7ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.focus .sub{text-align:center;color:#aab8d4;max-width:760px;margin:0 auto 34px;font-size:15px}
.focus .pillars{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;max-width:1100px;margin:0 auto}
.focus .pillar{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:26px;text-align:center;
  transition:transform .2s ease,border-color .2s ease}
.focus .pillar:hover{transform:translateY(-4px);border-color:#7cc6ff}
.focus .pillar .k{font-size:34px;font-weight:800;color:#7cc6ff}
.focus .pillar .t{margin-top:6px;font-size:17px;font-weight:700;color:#fff}
.focus .pillar .d{margin-top:10px;font-size:13.5px;color:#b9c6e0}
.focus .pillar .more{margin-top:16px;font-size:13.5px;color:#7cc6ff;font-weight:600}

/* SCENARIOS */
.scn .card{padding:28px;border-top:4px solid var(--brand)}
.scn .q{font-size:15px;font-weight:700;color:#b4232a;margin-bottom:10px}
.scn .how{font-size:14.5px;color:var(--ink);margin-top:8px}
.scn .how b{color:var(--brand)}
.scn .deliver{font-size:13.5px;color:var(--muted);margin-top:10px;background:var(--bg-soft);border-radius:10px;padding:10px 12px}
.scn .price{margin-top:12px;font-weight:700;color:var(--brand);font-size:15px}

/* MATRIX */
.matrix{background:var(--bg-soft)}
.tbl{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);
  border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
.tbl th,.tbl td{padding:13px 16px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line)}
.tbl th{background:#0f1b2d;color:#fff;font-weight:600}
.tbl tr:last-child td{border-bottom:0}
.pill{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12.5px;font-weight:700}
.pill.warn{background:#fdf3e2;color:var(--warn)}
.pill.plan{background:#eef0ff;color:#6b78ff}
.pill.ok{background:#e7f7ef;color:var(--ok)}

/* STEPS */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px 18px;position:relative;box-shadow:var(--shadow)}
.step .num{width:36px;height:36px;border-radius:50%;background:linear-gradient(120deg,var(--brand),var(--brand2));
  color:#fff;display:grid;place-items:center;font-weight:800;margin-bottom:12px}
.step h4{font-size:17px;font-weight:700;margin-bottom:6px}
.step p{font-size:13.5px;color:var(--muted)}

/* WHY */
.tech{background:
  linear-gradient(180deg,#0f1b2d,#13243f),
  radial-gradient(circle at 1px 1px, rgba(124,198,255,.06) 1px, transparent 0);
  background-size:auto,26px 26px;color:#eaf1ff}
.tech .sec-head .tag{color:#7cc6ff}
.tech .sec-head h2{color:#fff}
.tech .sec-head p{color:#aab8d4}
.tech .card{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.12);box-shadow:none}
.tech .card h3{color:#fff}
.tech .card p{color:#b9c6e0}
.tech .card .ic{background:rgba(124,198,255,.14);color:#7cc6ff}

/* ===== SERVICE DETAIL ===== */
.svc-hero{background:
  linear-gradient(120deg,#0f1b2d,#15324f),
  radial-gradient(circle at 1px 1px, rgba(124,198,255,.06) 1px, transparent 0);
  background-size:auto,26px 26px;color:#eaf1ff;padding:90px 0 56px}
.svc-hero .tag{display:inline-block;color:#7cc6ff;font-size:12px;font-weight:700;letter-spacing:2px;
  padding:5px 14px;border:1px solid rgba(124,198,255,.30);border-radius:999px;background:rgba(124,198,255,.08);box-shadow:0 0 18px rgba(124,198,255,.18)}
.svc-hero h1{font-size:clamp(26px,4.4vw,40px);font-weight:800;margin-top:10px;color:#fff}
.svc-hero p{margin-top:14px;color:#b9c6e0;max-width:720px;font-size:16px}
.svc-hero .price-pill{display:inline-block;margin-top:18px;background:rgba(124,198,255,.14);color:#7cc6ff;
  border:1px solid rgba(124,198,255,.3);padding:8px 16px;border-radius:999px;font-weight:700}
.svc-block{padding:44px 0;border-bottom:1px solid var(--line)}
.svc-block:last-of-type{border-bottom:0}
.svc-block .blk-tag{font-size:13px;font-weight:700;letter-spacing:1.5px;color:var(--brand);text-transform:uppercase}
.svc-block h2{font-size:clamp(22px,3vw,30px);margin:6px 0 18px;font-weight:800}
.svc-block p,.svc-block li{color:var(--muted);font-size:15px}
.svc-block ul{margin:10px 0 0 20px}
.svc-block li{margin:8px 0}
.svc-block li b{color:var(--ink)}
.doc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:14px}
.doc-card{background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:12px;padding:18px 20px}
.doc-card h4{font-size:16px;font-weight:700}
.doc-card p{font-size:14px;margin-top:6px}
.price-band{background:linear-gradient(120deg,var(--brand),var(--brand2));color:#fff;border-radius:var(--radius);
  padding:34px 30px;text-align:center;box-shadow:var(--shadow)}
.price-band .range{font-size:clamp(26px,4vw,40px);font-weight:800}
.price-band p{opacity:.95;margin-top:8px;max-width:640px;margin-left:auto;margin-right:auto}
.svc-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:22px}

/* ===== DEMO PAGE ===== */
.demo-grid{display:grid;gap:30px}
.demo-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.demo-card .d-head{padding:20px 24px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.demo-card .d-head h3{font-size:19px;font-weight:800}
.demo-card .d-head .d-tag{font-size:12.5px;color:var(--brand);background:#eaf1ff;border:1px solid #d7e4ff;padding:4px 10px;border-radius:999px}
.demo-card .d-body{padding:0 24px 10px}
.demo-card .d-body p{color:var(--muted);font-size:14.5px;padding:14px 0}
.demo-card iframe{width:100%;border:0;display:block;background:#0f1b2d;border-radius:10px}
.demo-card .d-foot{padding:0 24px 22px}
.demo-note{background:#0f1b2d;color:#b9c6e0;border-radius:12px;padding:16px 20px;font-size:14px;line-height:1.7;margin-bottom:8px}
.demo-note b{color:#7cc6ff}

/* ===== DEMO USAGE ===== */
.usage-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.u-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:var(--shadow)}
.u-card h4{font-size:16px;font-weight:800;margin-bottom:12px;color:var(--brand)}
.u-card ul{margin-left:18px;font-size:14px;color:var(--muted)}
.u-card li{margin:7px 0}
.u-card li b{color:var(--ink)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips span{font-size:12.5px;background:var(--bg-soft);border:1px solid var(--line);color:var(--ink);
  padding:5px 11px;border-radius:999px;font-weight:600}
.u-tip{margin-top:14px;font-size:13px;background:#fdf3e2;color:#9a6a08;border-radius:10px;padding:10px 12px;line-height:1.6}
.u-alert{margin-top:20px;background:linear-gradient(120deg,#0f1b2d,#15324f);color:#cfe0ff;border-radius:14px;
  padding:20px 22px;font-size:14.5px;line-height:1.7}
.u-alert b{color:#7cc6ff}

/* ===== GALLERY (screenshots + recording) ===== */
.gal-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.gal-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);margin:0}
.gal-card img{width:100%;height:190px;object-fit:cover;display:block;background:#0f1b2d}
.gal-card figcaption{padding:12px 14px;font-size:13.5px;font-weight:600;color:var(--ink)}
.gal-card.video{display:flex;flex-direction:column;justify-content:space-between}
.gal-note{margin-top:18px;font-size:13px;color:var(--muted)}

/* lazy iframe 默认占位高度，避免布局跳动；加载后由脚本注入 src */
.lazy-iframe{width:100%;border:0;display:block;background:#0f1b2d;border-radius:10px;min-height:520px}

/* ===== CASES ===== */
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:0;overflow:hidden;box-shadow:var(--shadow);
  display:flex;flex-direction:column;transition:transform .2s ease,border-color .2s ease}
.case-card:hover{transform:translateY(-4px);border-color:#c9d8f5}
.case-card .c-top{padding:22px 24px;background:linear-gradient(120deg,#0f1b2d,#15324f);color:#fff}
.case-card .c-top .c-ind{font-size:12.5px;color:#7cc6ff;font-weight:700;letter-spacing:1px}
.case-card .c-top h3{font-size:19px;font-weight:800;margin-top:6px}
.case-card .c-body{padding:20px 24px;flex:1}
.case-card .c-body .row{display:flex;gap:10px;margin:10px 0;font-size:14px}
.case-card .c-body .row .k{color:var(--brand);font-weight:700;min-width:64px}
.case-card .c-body .row .v{color:var(--muted)}
.case-card .c-foot{padding:16px 24px;border-top:1px solid var(--line);font-size:13.5px;color:var(--ok);font-weight:600}

/* ===== FAQ ===== */
.faq .item{border:1px solid var(--line);border-radius:12px;margin-bottom:12px;background:#fff;overflow:hidden;box-shadow:var(--shadow)}
.faq .q{padding:16px 18px;font-weight:700;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:10px}
.faq .q .arrow{transition:transform .2s ease;color:var(--brand)}
.faq .item.open .q .arrow{transform:rotate(180deg)}
.faq .a{max-height:0;overflow:hidden;transition:max-height .25s ease;padding:0 18px;color:var(--muted);font-size:14.5px}
.faq .item.open .a{max-height:320px;padding:0 18px 16px}

/* ===== CTA BAND ===== */
.cta-band{background:
  linear-gradient(120deg,var(--brand),var(--brand2)),
  radial-gradient(circle at 1px 1px, rgba(255,255,255,.10) 1px, transparent 0);
  background-size:auto,24px 24px;color:#fff;text-align:center;padding:54px 0}
.cta-band h2{font-size:clamp(22px,3.4vw,32px);font-weight:800}
.cta-band p{margin-top:10px;opacity:.92;max-width:620px;margin-left:auto;margin-right:auto}
.cta-band .btn.white{background:#fff;color:var(--brand);margin-top:22px}

/* ===== CONTACT ===== */
.contact{background:#fff;border-top:1px solid var(--line)}
.contact .grid{align-items:start}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.field input,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;
  font-size:15px;font-family:inherit;background:#fbfdff}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--brand)}
.info p{margin:8px 0;color:var(--muted)}
.info b{color:var(--ink)}
.note{font-size:12.5px;color:#94a3b8;margin-top:10px}
.contact-card{background:var(--bg-soft);border:1px solid var(--line);border-radius:14px;padding:22px}

/* ===== FOOTER ===== */
footer{background:#0f1b2d;color:#9fb0cc;text-align:center;padding:30px 0;font-size:13.5px}
footer b{color:#fff}
footer a{color:#cbd5e1}
footer a:hover{color:#7cc6ff}

@media(max-width:980px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .focus .pillars{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:880px){
  .g3,.g2,.g4,.steps,.doc-grid{grid-template-columns:1fr}
  .focus .pillars{grid-template-columns:1fr}
  .usage-grid{grid-template-columns:1fr}
  .gal-grid{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none;position:absolute;top:var(--nav-h);left:0;right:0;background:#fff;flex-direction:column;
    padding:16px 6vw;border-bottom:1px solid var(--line);gap:14px}
  .nav-links.open{display:flex}
  .menu-btn{display:block}
  .nav-cta{display:none}
}
@media(max-width:560px){
  .gal-grid{grid-template-columns:1fr}
  .gal-card img{height:170px}
  .lazy-iframe{min-height:420px}
  .hero{padding:72px 0 40px}
  .btn.lg{padding:14px 24px;font-size:15.5px;width:100%}
  .hero .cta{flex-direction:column}
  .u-card{padding:18px}
  .tbl{display:block;overflow-x:auto;white-space:nowrap}
}

/* ===== SCROLL REVEAL (CSS-only, 兼容降级) ===== */
@keyframes syzFade{from{opacity:0}to{opacity:1}}
@supports (animation-timeline:view()){
  @media (prefers-reduced-motion:no-preference){
    .card,.step,.pillar,.case-card,.u-card,.gal-card,.doc-card,.demo-card,.svc-block,.usage-grid .u-card{
      animation:syzFade .8s ease both;
      animation-timeline:view();
      animation-range:entry 0% cover 22%;
    }
  }
}