:root{
  --blue:#1a6db5; --blue-dark:#14558e; --blue-light:rgba(26,109,181,0.06);
  --heading:#0D1824; --text:#3B4A5C; --text-light:#56677C;
  --bg:#F5F7FA; --bg-alt:#EBEEF3; --bg-card:#FFFFFF;
  --border:rgba(0,0,0,0.08); --border-strong:rgba(0,0,0,0.14);
  --accent-dim:rgba(26,109,181,0.10);
  --shadow:0 1px 3px rgba(0,0,0,0.06),0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:0 4px 16px rgba(0,0,0,0.07);
  --radius:6px; --mono:'JetBrains Mono',ui-monospace,'SF Mono',Consolas,'Microsoft YaHei',monospace; --ok:#0d9488;
}
[data-theme="dark"]{
  --blue:#3a8fd4; --blue-dark:#2a6fa4; --blue-light:rgba(58,143,212,0.10);
  --heading:#E8ECF1; --text:#A8B4C4; --text-light:#8796AA;
  --bg:#0A1628; --bg-alt:#0E1C30; --bg-card:#1A2332;
  --border:rgba(255,255,255,0.07); --border-strong:rgba(255,255,255,0.12);
  --accent-dim:rgba(58,143,212,0.14);
  --shadow:0 1px 3px rgba(0,0,0,0.3); --shadow-md:0 6px 24px rgba(0,0,0,0.45); --ok:#22c55e;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{background:var(--bg);color:var(--text);font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei','Noto Sans CJK SC',sans-serif;line-height:1.6;font-size:16px;position:relative}
a{color:inherit;text-decoration:none}
.container{max-width:1200px;margin:0 auto;padding:0 40px;position:relative;z-index:1}

/* NAV */
#nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(245,247,250,0.94);backdrop-filter:blur(16px) saturate(1.6);-webkit-backdrop-filter:blur(16px) saturate(1.6);border-bottom:1px solid var(--border)}
[data-theme="dark"] #nav{background:rgba(10,22,40,0.92)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;padding:0 40px;max-width:1280px;margin:0 auto}
.nav-logo-img{height:34px;width:auto}
.nav-links{display:flex;align-items:center;gap:30px;list-style:none}
.nav-links a{font-size:0.875rem;font-weight:500;color:var(--text);position:relative;transition:color .2s}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:1.5px;background:var(--blue);transform:scaleX(0);transition:transform .2s;transform-origin:left}
.nav-links a:hover{color:var(--heading)}.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--blue);font-weight:600}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-login-btn{white-space:nowrap}
.nav-hamburger{display:none;background:none;border:none;cursor:pointer;padding:4px;color:var(--heading)}
.nav-hamburger svg{width:24px;height:24px}
.theme-toggle{width:36px;height:36px;border-radius:4px;border:1.5px solid var(--border);background:transparent;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;color:var(--text)}
.theme-toggle:hover{border-color:var(--blue);color:var(--blue)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:var(--radius);font-weight:600;font-size:0.875rem;cursor:pointer;transition:all .2s;border:none;font-family:inherit}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-dark);transform:translateY(-1px)}
.btn-outline{background:transparent;border:1.5px solid var(--border-strong);color:var(--heading)}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}
.btn-sm{padding:8px 16px;font-size:0.8rem}
@media(max-width:860px){
  .nav-hamburger{display:flex}
  .nav-links{display:none;position:fixed;top:64px;left:0;right:0;background:var(--bg-card);flex-direction:column;gap:0;padding:8px 40px;border-bottom:1px solid var(--border);box-shadow:var(--shadow-md)}
  .nav-links.open{display:flex}
  .nav-links li{padding:12px 0;border-bottom:1px solid var(--border);width:100%}
}

/* BREADCRUMB */
.crumb{padding:84px 0 0;font-size:0.8rem;color:var(--text-light);position:relative;z-index:1}
.crumb a:hover{color:var(--blue)}
.crumb span{color:var(--heading);font-weight:600}

/* HERO */
.p-hero{padding:28px 0 64px;position:relative;z-index:1}
.p-hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:start}

/* GALLERY */
.gallery-main{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--bg-alt);border:1px solid var(--border);box-shadow:var(--shadow-md);aspect-ratio:4/3}
.gallery-main img{width:100%;height:100%;object-fit:cover;display:block}
.gallery-tag{position:absolute;top:16px;left:16px;font-family:var(--mono);font-size:0.66rem;font-weight:600;letter-spacing:0.1em;text-transform:uppercase;color:#fff;background:rgba(10,22,40,0.6);backdrop-filter:blur(6px);padding:6px 11px;border-radius:100px}
.gallery-thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:12px}
.gallery-thumb{aspect-ratio:1;border-radius:var(--radius);overflow:hidden;border:2px solid var(--border);cursor:pointer;background:var(--bg-alt);transition:border-color .2s,transform .2s}
.gallery-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.gallery-thumb:hover{transform:translateY(-2px)}
.gallery-thumb.active{border-color:var(--blue)}

/* HERO TEXT */
.p-eyebrow{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.p-chip{font-family:var(--mono);font-size:0.66rem;font-weight:600;letter-spacing:0.08em;text-transform:uppercase;color:var(--blue);background:var(--blue-light);border:1px solid var(--accent-dim);padding:5px 10px;border-radius:100px}
.p-title{font-size:clamp(2.2rem,4.5vw,3.4rem);font-weight:900;letter-spacing:-0.02em;line-height:0.98;color:var(--heading)}
.p-title sup{font-size:0.4em;top:-1em;color:var(--blue)}
.p-sub{font-size:1.05rem;color:var(--blue);font-weight:600;margin-top:6px}
.p-desc{margin-top:18px;font-size:0.96rem;color:var(--text);line-height:1.65}
.p-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;margin:26px 0}
.p-stat{background:var(--bg-card);padding:16px 14px;text-align:center}
.p-stat b{display:block;font-family:var(--mono);font-size:1.35rem;font-weight:600;color:var(--heading);line-height:1}
.p-stat span{display:block;font-size:0.66rem;letter-spacing:0.05em;text-transform:uppercase;color:var(--text-light);margin-top:7px}
.p-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}

/* SECTIONS */
.p-section{padding:60px 0;position:relative;z-index:1}
.p-section.alt{background:var(--bg-alt)}
.p-head{margin-bottom:30px;max-width:640px}
.p-head .label{font-family:var(--mono);font-size:0.7rem;font-weight:600;letter-spacing:0.16em;text-transform:uppercase;color:var(--blue);margin-bottom:9px}
.p-head h2{font-size:1.75rem;font-weight:800;letter-spacing:-0.01em;color:var(--heading);line-height:1.1}
.p-head p{margin-top:10px;color:var(--text);font-size:0.96rem}

/* SPEC + APP two-col */
.spec-layout{display:grid;grid-template-columns:1.3fr 1fr;gap:32px;align-items:start}
.spec-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.spec-card h3{font-size:0.8rem;font-weight:700;letter-spacing:0.04em;text-transform:uppercase;color:var(--text-light);padding:16px 22px;border-bottom:1px solid var(--border);background:var(--bg-alt)}
table.spec{width:100%;border-collapse:collapse;font-size:0.88rem}
table.spec td{padding:13px 22px;border-bottom:1px solid var(--border)}
table.spec tr:last-child td{border-bottom:none}
table.spec td:first-child{color:var(--text-light)}
table.spec td:last-child{text-align:right;font-weight:600;color:var(--heading);font-family:var(--mono);font-size:0.84rem}
.app-block{display:flex;flex-direction:column;gap:22px}
.app-chips{display:flex;flex-wrap:wrap;gap:9px}
.app-chip{display:inline-flex;align-items:center;gap:7px;font-size:0.82rem;font-weight:600;color:var(--heading);background:var(--bg-card);border:1px solid var(--border);border-radius:100px;padding:9px 15px;box-shadow:var(--shadow)}
.app-chip svg{width:15px;height:15px;color:var(--blue)}
.std-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.std-badge{font-family:var(--mono);font-size:0.72rem;font-weight:600;color:var(--blue);background:var(--blue-light);border:1px solid var(--accent-dim);border-radius:var(--radius);padding:7px 12px}
.std-label{font-size:0.7rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--text-light);margin-right:4px}

/* PERFORMANCE TABLE */
.perf-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-card);box-shadow:var(--shadow)}
table.perf{width:100%;border-collapse:collapse;font-size:0.82rem;min-width:760px}
table.perf th{text-align:right;font-family:var(--mono);font-size:0.66rem;font-weight:600;letter-spacing:0.04em;text-transform:uppercase;color:var(--text-light);padding:13px 16px;border-bottom:1px solid var(--border-strong);background:var(--bg-alt);white-space:nowrap}
table.perf th:first-child,table.perf td:first-child{text-align:left}
table.perf td{padding:11px 16px;border-bottom:1px solid var(--border);text-align:right;font-family:var(--mono);color:var(--text)}
table.perf td:first-child{font-weight:700;color:var(--heading)}
table.perf tr:hover td{background:var(--blue-light)}
table.perf tfoot td{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei','Noto Sans CJK SC',sans-serif;text-align:left;font-size:0.74rem;color:var(--text-light);background:var(--bg-alt)}
.perf-note{font-size:0.78rem;color:var(--text-light);margin-top:12px}

/* VARIANTS */
.var-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.var-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s}
.var-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.var-img{aspect-ratio:16/9;background:var(--bg-alt);overflow:hidden}
.var-img img{width:100%;height:100%;object-fit:cover}
.var-body{padding:22px 24px}
.var-badge{font-family:var(--mono);font-size:0.66rem;font-weight:600;letter-spacing:0.06em;text-transform:uppercase;color:var(--blue);margin-bottom:8px}
.var-body h3{font-size:1.2rem;font-weight:800;color:var(--heading);line-height:1.05}
.var-body h3 sup{font-size:0.45em;top:-0.9em;color:var(--blue)}
.var-body .var-sub{font-size:0.8rem;color:var(--text-light);margin:3px 0 12px}
.var-body p{font-size:0.84rem;color:var(--text);line-height:1.55;margin-bottom:14px}
.var-std{display:flex;flex-wrap:wrap;gap:6px}

/* TOOLS CALLOUT */
.tools-callout{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.tool-link{display:flex;flex-direction:column;gap:10px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:transform .25s,border-color .25s,box-shadow .25s}
.tool-link:hover{transform:translateY(-4px);border-color:var(--accent-dim);box-shadow:var(--shadow-md)}
.tool-link .ti{width:40px;height:40px;border-radius:9px;background:var(--blue-light);display:flex;align-items:center;justify-content:center;color:var(--blue)}
.tool-link .ti svg{width:21px;height:21px}
.tool-link h4{font-size:0.98rem;color:var(--heading)}
.tool-link p{font-size:0.82rem;color:var(--text-light);line-height:1.5}
.tool-link .go{font-size:0.8rem;font-weight:600;color:var(--blue);margin-top:auto}

/* FOOTER */
.p-foot{background:var(--bg-card);border-top:1px solid var(--border);padding:54px 0;position:relative;z-index:1}
.p-foot .container{display:flex;flex-wrap:wrap;gap:28px;justify-content:space-between;align-items:center}
.p-foot h3{font-size:1.4rem;font-weight:800;color:var(--heading)}
.p-foot p{font-size:0.9rem;color:var(--text-light);margin-top:6px;max-width:460px}
.p-foot-cta{display:flex;gap:12px;flex-wrap:wrap}

@media(max-width:880px){
  .p-hero-grid{grid-template-columns:1fr;gap:30px}
  .spec-layout{grid-template-columns:1fr}
  .var-grid{grid-template-columns:1fr}
  .tools-callout{grid-template-columns:1fr}
}
@media(max-width:780px){
  .container{padding:0 22px}.nav-inner{padding:0 22px}
  .p-stats{grid-template-columns:1fr 1fr}
}

/* -- product-page cleanup 2026-10 (UI/UX review; scoped to product pages) -- */
:focus-visible{outline:2px solid #1a6db5!important;outline-offset:2px}
[data-theme="dark"] :focus-visible{outline-color:#8CC0EE!important}
.p-title{font-weight:800}
.p-head h2{font-weight:700}
.p-hero-grid>*,.spec-layout>*,.line-data>*{min-width:0}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.spec-card{max-width:100%}
.perf-wrap{max-width:100%}
.callout{background:var(--blue-light);border:1px solid var(--accent-dim);border-radius:var(--radius);padding:16px 18px;font-size:0.84rem;color:var(--text)}
@media(max-width:480px){.line-block{padding:18px 16px}.line-media{width:100%;height:180px}table.spec td{padding:11px 14px}}