:root{
  --ink:#050505;
  --paper:#f4f3ed;
  --white:#fff;
  --signal:#ffd400;
  --muted:#66645f;
  --line:#c9c7bf;
  --display:"Arial Black","Microsoft YaHei UI","Microsoft YaHei",sans-serif;
  --body:"Microsoft YaHei UI","Microsoft YaHei",Arial,sans-serif;
  --utility:Consolas,"Courier New",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--body);line-height:1.68}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.op-shell{width:min(1240px,calc(100% - 48px));margin-inline:auto}
.op-header{position:relative;z-index:30;background:var(--paper);border-bottom:2px solid var(--ink)}
.op-nav{min-height:78px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:34px}
.op-brand{display:inline-flex;align-items:center;gap:11px;font-family:var(--display);font-size:21px;letter-spacing:-.04em;white-space:nowrap}
.op-brand img{width:34px;height:34px;object-fit:contain}
.op-links{display:flex;justify-content:center;align-items:center;gap:clamp(16px,3vw,38px);font-size:14px;font-weight:800}
.op-links a{position:relative;padding:8px 0}
.op-links a::after{content:"";position:absolute;left:0;right:100%;bottom:2px;height:3px;background:var(--signal);transition:right .2s ease}
.op-links a:hover::after{right:0}
.op-cta{display:inline-flex;min-width:138px;min-height:48px;padding:0 22px;align-items:center;justify-content:center;background:var(--signal);border:2px solid var(--ink);font-weight:900;line-height:1;white-space:nowrap;word-break:keep-all;writing-mode:horizontal-tb;box-shadow:5px 5px 0 var(--ink);transition:transform .18s ease,box-shadow .18s ease}
.op-cta:hover{transform:translate(3px,3px);box-shadow:2px 2px 0 var(--ink)}
.op-hero{position:relative;min-height:820px;overflow:hidden;background:var(--ink);color:var(--white)}
.op-hero-grid{min-height:820px;display:grid;grid-template-columns:minmax(0,.9fr) minmax(420px,1.1fr);align-items:center;gap:clamp(36px,6vw,90px);position:relative;z-index:2}
.op-hero-copy{padding:80px 0;position:relative;z-index:3}
.op-eyebrow{display:inline-flex;align-items:center;gap:12px;margin:0 0 24px;font:700 12px/1 var(--utility);letter-spacing:.18em;text-transform:uppercase}
.op-eyebrow::before{content:"";width:34px;height:9px;background:var(--signal)}
.op-hero h1{max-width:9.2ch;margin:0;font-family:var(--display);font-size:clamp(64px,8.1vw,126px);line-height:.84;letter-spacing:-.085em}
.op-hero h1 span{display:block;color:var(--signal);-webkit-text-stroke:2px var(--signal)}
.op-hero-lead{max-width:620px;margin:32px 0 0;color:#d5d4ce;font-size:clamp(17px,1.6vw,21px)}
.op-actions{display:flex;flex-wrap:wrap;align-items:center;gap:22px;margin-top:34px}
.op-hero .op-cta{color:var(--ink);box-shadow:6px 6px 0 var(--white)}
.op-quiet-link{padding:9px 0;border-bottom:1px solid #898782;color:var(--white);font-weight:800}
.op-platforms{margin:26px 0 0;color:#aaa9a4;font:700 12px/1.5 var(--utility);letter-spacing:.1em}
.op-field{position:absolute;inset:-8% -15% -8% 34%;z-index:0;overflow:hidden;transform:skewX(-12deg);opacity:.96}
.op-field::before{content:"";position:absolute;inset:-20%;background:repeating-linear-gradient(90deg,var(--white) 0 2px,transparent 2px 17px);transform:perspective(540px) rotateY(-31deg) scaleX(1.18);transform-origin:right center;animation:line-drift 13s linear infinite}
.op-field::after{content:"";position:absolute;inset:20% -10% 14% 16%;background:repeating-linear-gradient(90deg,var(--ink) 0 6px,var(--white) 6px 9px,var(--ink) 9px 20px);border:2px solid var(--white);transform:rotate(8deg);mix-blend-mode:difference}
@keyframes line-drift{to{background-position:102px 0}}
.op-hero-media{position:relative;z-index:4;align-self:center;height:auto;margin:0;padding:0;overflow:visible;transform:none}
.op-hero-media::before{content:"";position:absolute;inset:14% 1% 9% 3%;background:var(--signal);border:3px solid var(--ink);z-index:-1;transform:translate(18px,18px)}
.op-hero-media img{display:block;width:100%;height:auto;min-height:0;max-height:none;margin:0;padding:0;object-fit:contain;object-position:center;clip-path:none;transform:none}
.op-route{background:var(--signal);border-block:2px solid var(--ink)}
.op-route-list{display:grid;grid-template-columns:repeat(3,1fr);margin:0;padding:0;list-style:none}
.op-route-list li{min-height:160px;padding:28px clamp(20px,3vw,42px);display:grid;grid-template-columns:auto 1fr;gap:18px;align-content:center;border-right:2px solid var(--ink)}
.op-route-list li:first-child{border-left:2px solid var(--ink)}
.op-route-list b{font:900 44px/1 var(--display)}
.op-route-list strong{display:block;margin-bottom:5px;font-size:18px}
.op-route-list span{display:block;font-size:14px;line-height:1.5}
.op-feature{padding:clamp(90px,12vw,168px) 0;background:var(--paper)}
.op-section-head{display:grid;grid-template-columns:.55fr 1.45fr;gap:40px;align-items:start;margin-bottom:64px}
.op-index{font:700 12px/1 var(--utility);letter-spacing:.16em}
.op-section-head h2,.op-panel-copy h2,.op-faq h2,.op-final h2{margin:0;font-family:var(--display);font-size:clamp(42px,6vw,82px);line-height:.94;letter-spacing:-.06em}
.op-section-head h2{max-width:16ch}
.op-feature-list{border-top:2px solid var(--ink)}
.op-feature-row{display:grid;grid-template-columns:80px .7fr 1.3fr;gap:30px;align-items:center;min-height:156px;padding:26px 0;border-bottom:2px solid var(--ink)}
.op-feature-row .glyph{font:900 54px/1 var(--display);color:transparent;-webkit-text-stroke:2px var(--ink)}
.op-feature-row h3{margin:0;font-size:clamp(24px,3vw,38px);line-height:1.1}
.op-feature-row p{max-width:620px;margin:0;color:var(--muted)}
.op-feature-row:nth-child(2) h3{background:var(--ink);color:var(--white);padding:5px 10px;width:max-content;max-width:100%}
.op-product{background:var(--white);border-block:2px solid var(--ink)}
.op-product-grid{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:clamp(44px,7vw,100px);padding-block:clamp(80px,10vw,144px)}
.op-product-visual{margin:0;border:2px solid var(--ink);background:var(--paper);box-shadow:16px 16px 0 var(--signal)}
.op-product-visual img{display:block;width:100%;height:auto;object-fit:contain}
.op-panel-copy{align-self:center}
.op-panel-copy h2{font-size:clamp(40px,5vw,68px)}
.op-panel-copy>p{margin:26px 0;color:var(--muted);font-size:18px}
.op-checks{margin:0 0 32px;padding:0;list-style:none;border-top:1px solid var(--ink)}
.op-checks li{padding:12px 0;border-bottom:1px solid var(--line);font-weight:800}
.op-checks li::before{content:"→";display:inline-block;width:32px;color:var(--ink)}
.op-faq{padding:clamp(90px,12vw,160px) 0;background:var(--ink);color:var(--white)}
.op-faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:clamp(50px,8vw,120px);align-items:start}
.op-faq h2{font-size:clamp(46px,6vw,78px)}
.op-faq .op-quiet-link{display:inline-block;margin-top:28px}
.op-faq-stack{border-top:1px solid #777}
.op-faq details{border-bottom:1px solid #777}
.op-faq summary{cursor:pointer;list-style:none;padding:24px 42px 24px 0;position:relative;font-size:18px;font-weight:900}
.op-faq summary::-webkit-details-marker{display:none}
.op-faq summary::after{content:"+";position:absolute;right:0;top:20px;color:var(--signal);font:900 28px/1 var(--display)}
.op-faq details[open] summary::after{content:"−"}
.op-faq details p{max-width:640px;margin:0 0 26px;color:#c8c7c2}
.op-insights{padding:clamp(80px,10vw,140px) 0;background:var(--paper)}
.op-insights-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:40px}
.op-insights-head h2{max-width:16ch;margin:0;font-family:var(--display);font-size:clamp(36px,5vw,64px);line-height:1;letter-spacing:-.055em}
.op-articles{display:grid;grid-template-columns:1.35fr .9fr .75fr;border:2px solid var(--ink)}
.op-articles article{min-height:280px;padding:30px;display:flex;flex-direction:column;border-right:2px solid var(--ink)}
.op-articles article:last-child{border-right:0;background:var(--signal)}
.op-articles small{font:700 12px var(--utility);letter-spacing:.1em}
.op-articles h3{margin:auto 0 12px;font-size:clamp(22px,2.5vw,34px);line-height:1.12}
.op-articles p{margin:0;color:var(--muted)}
.op-articles article:last-child p{color:var(--ink)}
.op-final{background:var(--signal);border-top:2px solid var(--ink)}
.op-final-grid{min-height:350px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:40px}
.op-final h2{max-width:13ch}
.op-final .op-cta{background:var(--white);min-width:180px;min-height:58px}
.op-footer{padding:54px 0 24px;background:var(--paper);border-top:2px solid var(--ink)}
.op-footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:40px}
.op-footer h2,.op-footer h3{margin-top:0}
.op-footer p{max-width:480px;color:var(--muted)}
.op-footer a{display:block;width:max-content;max-width:100%;margin:8px 0}
.op-copyright{margin-top:34px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font:12px var(--utility)}
a:focus-visible,summary:focus-visible{outline:3px solid var(--signal);outline-offset:4px}
@media(max-width:960px){
  .op-nav{grid-template-columns:auto 1fr}.op-nav>.op-cta{display:none}.op-links{justify-content:flex-end}
  .op-hero,.op-hero-grid{min-height:auto}.op-hero-grid{grid-template-columns:1fr;padding-block:64px}.op-hero-copy{padding:0}.op-field{inset:0 -40% 36% 40%;opacity:.6}.op-hero-media{width:min(680px,92%);justify-self:center}
  .op-section-head,.op-product-grid,.op-faq-grid{grid-template-columns:1fr}.op-product-visual{max-width:760px}.op-articles{grid-template-columns:1fr 1fr}.op-articles article:nth-child(2){border-right:0}.op-articles article:last-child{grid-column:1/3;border-top:2px solid var(--ink)}
}
@media(max-width:680px){
  .op-shell{width:min(100% - 24px,1240px)}.op-nav{display:flex;min-height:68px;flex-wrap:wrap;padding:10px 0}.op-links{order:3;width:100%;justify-content:flex-start;overflow-x:auto;gap:22px;padding-bottom:3px}
  .op-hero-grid{padding-block:46px;gap:42px}.op-hero h1{font-size:clamp(54px,19vw,82px)}.op-hero h1 span{-webkit-text-stroke:1px var(--signal)}.op-field{inset:0 -100% 45% 26%}
  .op-actions{display:grid}.op-actions .op-cta{width:100%}.op-quiet-link{width:max-content}
  .op-route-list{grid-template-columns:1fr}.op-route-list li,.op-route-list li:first-child{min-height:118px;border-left:2px solid var(--ink);border-bottom:2px solid var(--ink)}.op-route-list li:last-child{border-bottom:0}
  .op-section-head{gap:18px;margin-bottom:40px}.op-feature-row{grid-template-columns:52px 1fr;gap:18px}.op-feature-row p{grid-column:2}.op-feature-row .glyph{font-size:38px}
  .op-product-grid{padding-right:14px}.op-product-visual{box-shadow:10px 10px 0 var(--signal)}
  .op-articles{grid-template-columns:1fr}.op-articles article,.op-articles article:nth-child(2){min-height:230px;border-right:0;border-bottom:2px solid var(--ink)}.op-articles article:last-child{grid-column:auto;border-top:0;border-bottom:0}
  .op-insights-head{display:grid}.op-final-grid{grid-template-columns:1fr;align-content:center}.op-final .op-cta{width:100%}.op-footer-grid{grid-template-columns:1fr 1fr}.op-footer-grid>div:first-child{grid-column:1/3}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .op-field::before{animation:none}
  .op-cta,.op-links a::after{transition:none}
}
/* Hero image safety: keep as final override. */
.op-hero-grid{align-items:center}
.op-hero-media{align-self:center;height:auto;padding:0;margin-top:0;margin-bottom:0;overflow:visible;transform:none}
.op-hero-media img{display:block;width:100%;height:auto;min-height:0;max-height:none;margin:0;padding:0;object-fit:contain;object-position:center;clip-path:none;transform:none}