.electronic-pen-page{--ep-header-height:65px;--ep-blue:#0055a5;background:#fff;color:#273746}
.ep-main{overflow:clip;font-family:"微软雅黑",Arial,sans-serif}
.ep-main *{box-sizing:border-box}
.ep-main h1,.ep-main h2,.ep-main h3,.ep-main p,.ep-main figure,.ep-main ul{margin:0}
.ep-container{width:88%;max-width:1440px;margin:0 auto}
.ep-hero{position:relative;isolation:isolate;height:clamp(340px,30vw,560px);margin-top:var(--ep-header-height);background:#F5F5F7}
.ep-hero>img{position:absolute;inset:0;z-index:-1;width:100%;height:100%;object-fit:cover;object-position:center;filter:brightness(1.01);mix-blend-mode:multiply}
.ep-hero-copy{height:100%;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;color:#273746}
.ep-hero h1{font-size:clamp(32px,3vw,52px);line-height:1.4}
.ep-hero p{margin-top:20px;font-size:clamp(14px,1.2vw,18px);line-height:1.8;color:#657180}
.ep-explore{margin-top:30px}
.ep-explore svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.3;transition:transform .35s}
.ep-explore:hover svg,.ep-explore:focus-visible svg{transform:translateY(4px)}
.ep-section{position:relative;scroll-margin-top:calc(var(--ep-header-height) + 24px)}
.ep-section-inner{padding:clamp(64px,6vw,100px) 0}
.ep-section h2{font-size:clamp(30px,2.8vw,46px);line-height:1.5;color:#fff}
/* Compact charcoal product stage with the original restrained spotlight treatment. */
.ep-visually-hidden { position: absolute !important; width: 1px !important; height: 1px !important; margin: -1px !important; padding: 0 !important; overflow: hidden !important; clip-path: inset(50%) !important; white-space: nowrap !important; }
.ep-anatomy { --pen-pin-height: 835px; background: #000; }
.ep-anatomy-pin { position: relative; display: flex; align-items: center; justify-content: center; min-height: 580px; padding: 48px 0; }
.ep-anatomy-canvas { position: relative; width: 88%; max-width: 1440px; }
.ep-anatomy-visual { position: relative; isolation: isolate; container-type: inline-size; height: min(640px,calc(var(--pen-pin-height) - 48px)); min-height: 420px; }
.ep-anatomy-visual::before { content: ''; position: absolute; z-index: -1; inset: 35% 8%; background: radial-gradient(ellipse,rgba(95,150,190,.22),transparent 70%); pointer-events: none; }
.ep-anatomy-whole { position: absolute; inset: 0; z-index: 3; opacity: 0; pointer-events: none; will-change: opacity; }
.ep-anatomy-white-pen { position: absolute; top: 50%; left: 50%; display: block; width: 78cqw; height: auto; transform: translate(-50%,-50%); filter: drop-shadow(0 0 18px rgba(126,184,222,.15)); }
.ep-anatomy-parts { position: absolute; inset: 0; }
.ep-anatomy-part { position: absolute; top: 50%; display: block; overflow: hidden; transform: translate3d(var(--part-shift,0cqw),-50%,0); filter: drop-shadow(0 9px 7px rgba(0,0,0,.4)); will-change: transform,opacity; }
.ep-anatomy-part img { position: absolute; display: block; height: auto; max-width: none; }
.ep-anatomy-leaders { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; }
.ep-anatomy-leaders path { stroke: #a4bccf; stroke-width: 1; stroke-opacity: .6; vector-effect: non-scaling-stroke; }
.ep-anatomy-leaders circle { fill: #34434e; stroke: #a4d1eb; stroke-width: 1.2; vector-effect: non-scaling-stroke; }
.ep-anatomy-labels { margin: 0; padding: 0; list-style: none; }
.ep-anatomy-label { position: absolute; left: var(--label-x); width: 15.4%; transform: translateX(-50%); color: #e7edf2; font-size: clamp(12px,1vw,15px); line-height: 1.7; text-align: center; opacity: var(--label-opacity,1); }
.ep-anatomy-label--top { top: 12%; }
.ep-anatomy-label--bottom { bottom: 12%; }
.ep-anatomy-label > span { display: block; }
.ep-anatomy-label-detail { margin-top: 4px; color: #acbdcb; font-size: 11px; line-height: 1.65; }
.ep-anatomy.is-scroll-driven { height: var(--pen-section-height,2200px); }
.ep-anatomy.is-scroll-driven .ep-anatomy-pin { position: sticky; top: 0; height: var(--pen-pin-height); min-height: 0; padding: 24px 0; }
/* Independent, editable copy grids based on the supplied clean four-column reference. */
.ep-capabilities { background: #fff; color: #263b4f; }
.ep-capabilities h2 { color: #263b4f; font-size: clamp(30px,2.8vw,42px); line-height: 1.45; text-align: center; }
.ep-capability-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 56px clamp(28px,3.7vw,64px); margin-top: 50px; }
.ep-capabilities--software .ep-capability-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
.ep-capability-card { min-width: 0; }
.ep-capability-card h3 { color: #0054b6; font-size: clamp(22px,1.75vw,28px); line-height: 1.45; }
.ep-capability-rule { position: relative; height: 1px; margin: 18px 0 22px; overflow: hidden; background: #dce2e8; }
.ep-capability-rule::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg,#0877b9,#75a7e2); transform: scaleX(0); transform-origin: left; transition: transform .6s cubic-bezier(.22,1,.36,1); }
.ep-capability-card p { color: #697581; font-size: 16px; line-height: 1.9; letter-spacing: .01em; text-wrap: pretty; }
.ep-capabilities--software::before { content: ''; position: absolute; top: 0; left: 6%; right: 6%; height: 1px; background: #edf0f3; }
.ep-main :is(a,button,[tabindex]):focus-visible { outline: 2px solid #69b7ed; outline-offset: 5px; }
.ep-reveal-ready [data-ep-reveal] { opacity: 0; transform: translate3d(0,20px,0); transition: opacity .85s ease,transform 1s cubic-bezier(.22,1,.36,1); transition-delay: var(--ep-reveal-delay,0ms); }
.ep-reveal-ready [data-ep-reveal].is-revealed { opacity: 1; transform: none; }
@media (hover: hover) and (pointer: fine) { .ep-capability-card:hover .ep-capability-rule::after { transform: scaleX(1); } }
@media (max-width: 1100px) {
  .ep-anatomy-canvas { width: 90%; }
  .ep-anatomy-visual { height: clamp(150px,24svh,220px); min-height: 0; }
  .ep-anatomy-leaders { display: none; }
  .ep-anatomy-pin { min-height: 0; padding: 40px 0; }
  .ep-anatomy-labels { position: static; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px 20px; margin-top: 26px; }
  .ep-anatomy-label { position: static; width: auto; transform: none; padding-left: 12px; border-left: 1px solid #668096; font-size: 13px; text-align: left; }
  .ep-anatomy-label-detail { font-size: 11px; }
  .ep-capability-grid { gap: 46px 32px; }
  .ep-capability-card h3 { font-size: 22px; }
  .ep-capability-card p { font-size: 14px; }
}
@media (max-width: 900px) { .ep-capability-grid { grid-template-columns: repeat(2,minmax(0,1fr)); } .ep-capabilities--software .ep-capability-grid { grid-template-columns: repeat(2,minmax(0,1fr)); } }
@media (max-width: 767px) {
  .ep-container { width: 90%; }
  .ep-hero { height: 340px; }
  .ep-hero > img { inset: auto 0 0; height: 48%; object-fit: contain; object-position: right bottom; }
  .ep-hero-copy { height: auto; padding-top: 28px; justify-content: flex-start; }
  .ep-hero h1 { font-size: 32px; }
  .ep-hero p { margin-top: 12px; font-size: 13px; max-width: none; }
  .ep-explore { margin-top: 18px; }
  .ep-section-inner { padding: 58px 0; }
  .ep-section h2 { font-size: 28px; }
  .ep-anatomy-labels { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 9px 14px; margin-top: 22px; }
  .ep-anatomy-label { padding-left: 8px; font-size: 12px; line-height: 1.6; }
  .ep-capability-grid { gap: 36px 26px; margin-top: 34px; }
  .ep-capability-card h3 { font-size: 21px; }
  .ep-capability-rule { margin: 17px 0 19px; }
  .ep-capability-card p { font-size: 14px; line-height: 1.9; }
}
@media (max-width: 480px) { .ep-capability-grid,.ep-capabilities--software .ep-capability-grid { grid-template-columns: 1fr; gap: 34px; } .ep-capability-card h3 { font-size: 23px; } }
@media (max-height: 619px) {
  .ep-anatomy.is-scroll-driven { height: auto; }
  .ep-anatomy.is-scroll-driven .ep-anatomy-pin { position: relative; top: auto; height: auto; padding: 40px 0; }
}
@media (prefers-reduced-motion: reduce) {
  .ep-main * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .ep-anatomy.is-scroll-driven { height: auto; }
  .ep-anatomy.is-scroll-driven .ep-anatomy-pin { position: relative; top: auto; height: auto; min-height: 0; padding: 48px 0; }
  .ep-anatomy-whole { display: none; }
  .ep-anatomy-part { opacity: 1 !important; transform: translate3d(0,-50%,0) !important; }
  .ep-anatomy-label,.ep-anatomy-leaders g { opacity: 1 !important; }
  .ep-reveal-ready [data-ep-reveal] { opacity: 1; transform: none; }
}
@media print {
  .ep-anatomy.is-scroll-driven { height: auto; break-inside: avoid; }
  .ep-anatomy.is-scroll-driven .ep-anatomy-pin { position: relative; top: auto; height: auto; padding: 32px 0; }
  .ep-anatomy-whole { display: none; }
  .ep-anatomy-part { opacity: 1 !important; transform: translate3d(0,-50%,0) !important; }
  .ep-anatomy-label,.ep-anatomy-leaders g,.ep-reveal-ready [data-ep-reveal] { opacity: 1 !important; transform: none; }
}

/* Image-led technology accordion: one expanded story, three editable backgrounds. */
.ep-key-tech { background: #fff; color: #273746; }
.ep-key-tech h2 { color: #273746; text-align: center; font-size: clamp(30px,2.8vw,42px); line-height: 1.5; }
.ep-key-tech-grid { display: flex; gap: 0; min-height: 580px; height: clamp(540px,42vw,670px); margin-top: 42px; overflow: hidden; background: #14283b; }
.ep-key-tech-card { position: relative; isolation: isolate; display: flex; align-items: center; flex: 1 1 0; min-width: 0; overflow: hidden; color: #fff; }
.ep-key-tech-image { position: absolute; inset: 0; z-index: -3; width: 100%; height: 100%; object-fit: cover; object-position: 50% 55%; transform: scale(1.035); transition: transform 1.15s cubic-bezier(.22,1,.36,1); }
.ep-key-tech-card::before,.ep-key-tech-card::after { content: ''; position: absolute; inset: 0; pointer-events: none; }
.ep-key-tech-card::before { z-index: -2; background: linear-gradient(180deg,rgba(4,15,28,.33),rgba(4,15,28,.5) 52%,rgba(4,15,28,.26)); }
.ep-key-tech-card::after { z-index: -1; background: linear-gradient(145deg,rgba(8,69,143,.85),rgba(4,47,105,.76)); opacity: 0; transition: opacity .65s ease; }
.ep-key-tech-content { width: 100%; padding: 50px clamp(26px,3.9vw,64px); }
.ep-key-tech-card h3 { color: #fff; font-size: clamp(22px,1.85vw,30px); line-height: 1.5; }
.ep-key-tech-trigger { display: flex; flex-direction: column; align-items: flex-start; gap: 24px; width: 100%; padding: 0; border: 0; border-radius: 0; background: transparent; box-shadow: none; color: inherit; font: inherit; letter-spacing: inherit; text-align: left; cursor: pointer; -webkit-tap-highlight-color: transparent; }
.ep-key-tech-trigger svg { display: block; flex: 0 0 auto; width: 44px; height: 44px; }
.ep-key-tech-card p { max-width: 420px; margin-top: 32px; color: rgba(255,255,255,.92); font-size: 15px; line-height: 2; text-wrap: pretty; }
.ep-key-tech-grid.is-enhanced .ep-key-tech-card { transition: flex-grow .8s cubic-bezier(.22,1,.36,1); }
.ep-key-tech-grid.is-enhanced .ep-key-tech-card:not(.is-active) .ep-key-tech-trigger { align-items: center; text-align: center; }
.ep-key-tech-grid.is-enhanced .ep-key-tech-card p { max-height: 0; margin-top: 0; opacity: 0; overflow: hidden; transform: translateY(14px); transition: max-height .65s cubic-bezier(.22,1,.36,1),margin-top .65s ease,opacity .25s ease,transform .65s ease; }
.ep-key-tech-grid.is-enhanced .ep-key-tech-card.is-active { flex-grow: 1.34; }
.ep-key-tech-card.is-active::after { opacity: 1; }
.ep-key-tech-card.is-active .ep-key-tech-image { transform: scale(1); }
.ep-key-tech-grid.is-enhanced .ep-key-tech-card.is-active p { max-height: 280px; margin-top: 32px; opacity: 1; transform: none; transition: max-height .65s cubic-bezier(.22,1,.36,1),margin-top .65s ease,opacity .5s ease .18s,transform .65s ease .1s; }
.ep-key-tech-trigger:focus-visible { outline: 2px solid #fff !important; outline-offset: 12px !important; }
@media (min-width: 901px) and (max-width: 1150px) { .ep-key-tech-content { padding-left: 26px; padding-right: 26px; } .ep-key-tech-card h3 { font-size: 23px; } .ep-key-tech-card p { font-size: 14px; } }
@media (max-width: 900px) {
  .ep-key-tech-grid { flex-direction: column; height: auto; min-height: 0; margin-top: 30px; }
  .ep-key-tech-card { flex: none; min-height: 440px; }
  .ep-key-tech-grid.is-enhanced .ep-key-tech-card { flex: none; min-height: 160px; transition: min-height .7s cubic-bezier(.22,1,.36,1); }
  .ep-key-tech-grid.is-enhanced .ep-key-tech-card.is-active { min-height: 440px; }
  .ep-key-tech-image { object-position: 50% 60%; }
  .ep-key-tech-content { padding: 32px; }
  .ep-key-tech-card h3 { font-size: 24px; }
  .ep-key-tech-trigger { gap: 18px; }
  .ep-key-tech-grid.is-enhanced .ep-key-tech-card:not(.is-active) .ep-key-tech-trigger { flex-direction: row; justify-content: flex-start; text-align: left; gap: 20px; }
  .ep-key-tech-trigger svg { width: 36px; height: 36px; }
  .ep-key-tech-card p { max-width: 600px; font-size: 14px; }
  .ep-key-tech-grid.is-enhanced .ep-key-tech-card.is-active p { margin-top: 24px; }
}
@media (max-width: 420px) { .ep-key-tech h2 { font-size: 28px; } .ep-key-tech-content { padding: 28px; } .ep-key-tech-card h3 { font-size: 22px; } }
@media (prefers-reduced-motion: reduce) { .ep-key-tech-grid.is-enhanced .ep-key-tech-card,.ep-key-tech-grid.is-enhanced .ep-key-tech-card p,.ep-key-tech-grid.is-enhanced .ep-key-tech-card.is-active p,.ep-key-tech-image,.ep-key-tech-card::after { transition: none; } }

/* Keep the product visible soon after the technology cards instead of leaving a full screen gap. */
.ep-key-tech .ep-section-inner { padding-bottom: 24px; }
/* Equal-width application cards; all five images and captions remain unchanged. */
.ep-applications { padding: clamp(64px,6vw,96px) 0 clamp(64px,6vw,96px); overflow: hidden; background: #fff; }
.ep-applications-wrap { width: 94%; max-width: 1760px; margin: 0 auto; }
.ep-applications h2 { color: #263b4f; font-size: clamp(30px,2.8vw,42px); line-height: 1.45; text-align: center; }
.ep-applications-track { display: grid; grid-auto-flow: column; grid-auto-columns: calc((100% - 48px)/3.12); gap: 24px; margin-top: 46px; padding-bottom: 8px; overflow-x: auto; scroll-snap-type: x proximity; overscroll-behavior-x: contain; scrollbar-width: none; }
.ep-applications-track::-webkit-scrollbar { display: none; }
.ep-application-card { min-width: 0; overflow: hidden; border-radius: 22px; background: #f6f8fb; scroll-snap-align: start; }
.ep-application-card > img { display: block; width: 100%; height: auto; aspect-ratio: 1.6; object-fit: cover; object-position: center; user-select: none; }
.ep-application-copy { padding: 28px 28px 34px; }
.ep-application-copy h3 { margin: 0; color: #202d39; font-size: clamp(22px,1.6vw,28px); line-height: 1.5; }
.ep-application-copy p { margin-top: 12px; color: #6a7480; font-size: 16px; line-height: 1.85; }
.ep-applications-controls { display: flex; justify-content: flex-end; gap: 16px; margin-top: 24px; }
.ep-applications-arrow { display: flex; justify-content: center; align-items: center; width: 48px; height: 48px; padding: 0; border: 0; border-radius: 50%; background: #e9edf2; color: #243d51; cursor: pointer; transition: background .25s,color .25s,opacity .25s; }
.ep-applications-arrow svg { width: 22px; height: 22px; }
.ep-applications-arrow:is(:hover,:focus-visible):not(:disabled) { background: #0369ae; color: #fff; }
.ep-applications-arrow:disabled { opacity: .4; cursor: default; }
.ep-applications-track:focus-visible { outline: 2px solid #0369ae; outline-offset: 5px; }
@media (max-width: 1100px) {
  .ep-applications-track { grid-auto-columns: calc((100% - 24px)/2.12); }
  .ep-anatomy.is-scroll-driven .ep-anatomy-canvas { height: 100%; }
  .ep-anatomy.is-scroll-driven .ep-anatomy-visual { position: absolute; top: 50%; left: 0; right: 0; transform: translateY(-50%); }
  .ep-anatomy.is-scroll-driven .ep-anatomy-labels { position: absolute; top: calc(50% + 72px); left: 0; right: 0; max-height: calc(50% - 78px); margin-top: 0; overflow-y: auto; scrollbar-width: thin; }
}
@media (max-width: 600px) {
  .ep-key-tech .ep-section-inner { padding-bottom: 20px; }
  .ep-applications { padding: 58px 0 64px; }
  .ep-applications-wrap { width: 90%; }
  .ep-applications h2 { font-size: 28px; }
  .ep-applications-track { grid-auto-columns: 88%; gap: 16px; margin-top: 32px; }
  .ep-application-copy { padding: 23px 23px 28px; }
  .ep-application-copy p { font-size: 14px; }
  .ep-applications-arrow { width: 44px; height: 44px; }
}
@media (prefers-reduced-motion: reduce) { .ep-applications-arrow { transition: none; } }
@media print { .ep-applications-track { display: grid; grid-auto-flow: row; grid-template-columns: repeat(2,minmax(0,1fr)); overflow: visible; } .ep-applications-controls { display: none; } }