/* HORIZON / 地平线视觉档案 */
:root{
  --night:#05090d;
  --night-soft:#0b1218;
  --paper:#f1eee7;
  --white:#fffdf8;
  --muted:#a5aaa8;
  --muted-deep:#737b7c;
  --gold:#c5a35a;
  --line:rgba(241,238,231,.18);
  --font-body:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-meta:"Cascadia Code","JetBrains Mono","SF Mono",Consolas,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--night)}
body{background:var(--night);color:var(--paper);font-family:var(--font-body);font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}
body:not(.home-page){min-height:100vh}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit}
img{display:block;max-width:100%}
::selection{background:var(--gold);color:var(--night)}
:focus-visible{outline:1px solid var(--gold);outline-offset:4px}

/* Shared navigation. The home nav floats over the image; archive pages keep it in flow. */
.nav{position:sticky;top:0;z-index:20;background:rgba(5,9,13,.9);border-bottom:1px solid rgba(241,238,231,.1);backdrop-filter:blur(12px);animation:rise-in 1.5s cubic-bezier(.2,.7,.3,1) .15s both}
.home-page .nav{position:absolute;inset:0 0 auto;background:linear-gradient(180deg,rgba(3,7,10,.5),transparent);border-bottom-color:transparent;backdrop-filter:none}
.nav-in{width:min(1240px,calc(100% - 96px));min-height:88px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:36px}
.brand{display:inline-flex;align-items:baseline;gap:12px;white-space:nowrap;font-family:var(--font-meta);font-size:15px;letter-spacing:.17em}
.brand i{font-style:normal;color:var(--gold);font-family:var(--font-body);letter-spacing:0}
.brand em{font-style:normal;color:rgba(241,238,231,.68);font-family:var(--font-body);font-size:12px;letter-spacing:.08em}
.nav-right{display:flex;align-items:center;gap:36px}
.nav-links{display:flex;align-items:center;gap:30px;font-family:var(--font-meta);font-size:11px;letter-spacing:.1em;text-transform:uppercase}
.nav-links a{color:rgba(241,238,231,.8);transition:color .2s}
.nav-links a:hover,.nav-links a.on{color:var(--white)}
.nav-links a.on::after{content:"";display:block;height:1px;margin-top:7px;background:var(--gold)}
.lang-switcher{display:flex;align-items:center;gap:2px;font-family:var(--font-meta);font-size:10px;letter-spacing:.06em}
.lang-switcher button{border:0;background:none;color:var(--muted);padding:5px 6px;cursor:pointer;transition:color .2s,background .2s}
.lang-switcher button:hover{color:var(--paper)}
.lang-switcher button.on{background:var(--paper);color:var(--night)}

/* Home: one full-bleed cinematic frame, with the copy set into the dark left field. */
.hero{position:relative;min-height:100svh;isolation:isolate;overflow:hidden;background:var(--night)}
.hero-bg{position:absolute;inset:-1.5%;z-index:-3;background:url("assets/horizon-homepage-concept.png") center center/cover no-repeat;animation:hero-scene-rise 8s cubic-bezier(.2,.72,.3,1) both,hero-breathe 26s ease-in-out 8s infinite alternate}
.hero-shade{position:absolute;inset:0;z-index:-2;background:linear-gradient(90deg,rgba(3,7,10,.65) 0%,rgba(3,7,10,.25) 40%,transparent 72%),linear-gradient(0deg,rgba(3,7,10,.72) 0%,transparent 33%)}
 .hero::before{content:"";position:absolute;inset:-12%;z-index:-1;pointer-events:none;background:radial-gradient(42% 30% at 78% 105%,rgba(197,125,67,.25),transparent 72%);opacity:0;transform:translateY(8%);animation:dawn-glow-rise 9s cubic-bezier(.25,.65,.3,1) .3s both}
@keyframes hero-scene-rise{0%{opacity:.15;transform:translateY(3.5%) scale(1.06);filter:brightness(.55) saturate(.7)}65%{opacity:.88;transform:translateY(.8%) scale(1.025);filter:brightness(.88) saturate(.9)}100%{opacity:1;transform:translateY(0) scale(1.012);filter:brightness(1) saturate(1)}}
@keyframes hero-breathe{from{transform:translateY(0) scale(1.012)}to{transform:translateY(-.25%) scale(1.028)}}
@keyframes dawn-glow-rise{0%{opacity:0;transform:translateY(8%)}45%{opacity:.72}100%{opacity:.32;transform:translateY(0)}}
@keyframes rise-in{0%{opacity:0;transform:translateY(26px);filter:blur(7px)}100%{opacity:1;transform:translateY(0);filter:blur(0)}}
.hero-copy{position:absolute;left:max(48px,8vw);top:40%;width:min(560px,42vw);transform:translateY(-16%)}
.hero-kicker{margin-bottom:18px;color:rgba(241,238,231,.62);font-family:var(--font-meta);font-size:9px;letter-spacing:.12em;text-transform:uppercase;animation:rise-in 1.8s cubic-bezier(.2,.7,.3,1) .85s both}
.hero-copy h1{font-size:clamp(34px,3.5vw,56px);font-weight:500;letter-spacing:.03em;line-height:1.22;color:var(--white);text-wrap:balance;animation:rise-in 2.2s cubic-bezier(.2,.7,.3,1) 1.2s both}
.hero-lead{max-width:35em;margin-top:20px;color:rgba(241,238,231,.72);font-size:13.5px;line-height:1.85;animation:rise-in 1.8s cubic-bezier(.2,.7,.3,1) 1.85s both}
.hero-link{display:inline-flex;align-items:center;gap:12px;margin-top:24px;padding-bottom:6px;border-bottom:1px solid rgba(241,238,231,.66);font-size:13px;letter-spacing:.08em;transition:color .2s,border-color .2s;animation:rise-in 1.6s cubic-bezier(.2,.7,.3,1) 2.35s both}
.hero-link b{font-family:var(--font-meta);font-size:15px;font-weight:400;color:var(--gold)}
.hero-link:hover{color:var(--white);border-color:var(--gold)}
.hero-meta{position:absolute;left:max(48px,8vw);bottom:46px;display:grid;gap:7px;color:rgba(241,238,231,.72);font-family:var(--font-meta);font-size:9px;letter-spacing:.11em;animation:rise-in 1.8s cubic-bezier(.2,.7,.3,1) 2.85s both}
.hero-meta span:last-child{color:rgba(241,238,231,.52)}
.hero-scroll{position:absolute;right:42px;bottom:53px;display:flex;flex-direction:column;align-items:center;gap:14px;color:rgba(241,238,231,.66);font-family:var(--font-meta);font-size:9px;letter-spacing:.16em;writing-mode:vertical-rl;animation:rise-in 1.6s cubic-bezier(.2,.7,.3,1) 3.25s both}
.hero-scroll i{display:block;width:1px;height:54px;background:linear-gradient(var(--gold),rgba(197,163,90,0))}

/* Archive and contact pages share the same quiet editorial frame. */
.page-head{position:relative;padding:132px 0 62px;overflow:hidden;border-bottom:1px solid rgba(241,238,231,.1)}
.page-head::after{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(70% 110% at 82% 28%,rgba(197,163,90,.2),transparent 63%),linear-gradient(90deg,rgba(5,9,13,.96),rgba(5,9,13,.78))}
.page-head .wrap{position:relative}
.page-head .horizon{position:absolute;top:24px;left:0;width:100%;height:1px;background:linear-gradient(90deg,transparent,var(--gold),transparent);opacity:.7}
.page-head .horizon::after{content:"";position:absolute;left:16%;top:-2px;width:5px;height:5px;background:var(--gold);border-radius:50%;box-shadow:0 0 12px rgba(197,163,90,.7)}
.wrap{width:min(1240px,calc(100% - 96px));margin:0 auto}
.page-kicker{color:var(--gold);font-family:var(--font-meta);font-size:10px;letter-spacing:.14em;text-transform:uppercase}
.page-title{max-width:760px;margin-top:18px;color:var(--white);font-size:clamp(34px,4.2vw,62px);font-weight:500;letter-spacing:.02em;line-height:1.08}
.sec-lead{max-width:600px;margin-top:18px;color:var(--muted);font-size:14px;line-height:1.85}
.section{padding:76px 0 112px}
.section--page{padding-top:58px}
.filters{display:flex;flex-wrap:wrap;gap:27px;margin-bottom:44px;border-bottom:1px solid rgba(241,238,231,.16)}
.chip{position:relative;border:0;background:none;padding:0 0 15px;color:var(--muted);cursor:pointer;font-size:13px;letter-spacing:.05em;transition:color .2s}
.chip::after{content:"";position:absolute;left:0;right:100%;bottom:-1px;height:1px;background:var(--gold);transition:right .2s}
.chip:hover,.chip.on{color:var(--paper)}
.chip.on::after{right:0}
.lib{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:46px 26px}
.lib-card{grid-column:span 4;display:block;min-width:0}
.lib-card{grid-column:auto}
.lib-thumb{position:relative;overflow:hidden;aspect-ratio:4 / 3;background:var(--night-soft);border-top:1px solid rgba(241,238,231,.38);border-bottom:1px solid rgba(241,238,231,.12)}
.lib-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(.78);opacity:.86;transition:transform .55s ease,filter .3s,opacity .3s}
.lib-card:hover .lib-thumb img{transform:scale(1.04);filter:saturate(1);opacity:1}
.lib-thumb .dur{position:absolute;right:12px;top:11px;color:var(--paper);font-family:var(--font-meta);font-size:9px;letter-spacing:.12em}
.lib-body{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;min-height:64px;padding:13px 0 10px;border-bottom:1px solid rgba(241,238,231,.13)}
.lib-body h3{display:-webkit-box;overflow:hidden;color:var(--paper);font-size:14px;font-weight:500;line-height:1.55;-webkit-box-orient:vertical;-webkit-line-clamp:2}
.lib-body span{flex:none;color:var(--muted-deep);font-family:var(--font-meta);font-size:9px;letter-spacing:.08em;text-transform:uppercase}
.cases-contact{display:flex;align-items:baseline;justify-content:space-between;gap:30px;margin-top:106px;padding-top:22px;border-top:1px solid rgba(241,238,231,.16);color:var(--muted);font-size:14px}
.tlink{color:var(--paper);border-bottom:1px solid rgba(241,238,231,.45);padding-bottom:5px;transition:color .2s,border-color .2s}
.tlink:hover{color:var(--gold);border-color:var(--gold)}

/* Contact is intentionally quiet and comes after the work. */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:clamp(60px,10vw,150px);align-items:start}
.contact-intro{max-width:450px}
.contact-intro h2{font-size:clamp(24px,3vw,38px);font-weight:500;line-height:1.25;color:var(--white)}
.chan{display:flex;align-items:baseline;gap:20px;padding:17px 0;border-bottom:1px solid rgba(241,238,231,.14);font-size:14px}
.chan b{min-width:70px;color:var(--paper);font-weight:500}
.chan span{color:var(--muted);font-family:var(--font-meta);font-size:11px;letter-spacing:.03em}
.qr{display:flex;align-items:center;gap:18px;margin-top:28px;color:var(--muted);font-size:13px}
.qr-box{display:flex;align-items:center;justify-content:center;width:96px;height:96px;border:1px solid rgba(241,238,231,.3);color:var(--muted-deep);font-size:11px;line-height:1.5;text-align:center}
.form{padding-top:2px}
.form label{display:block;margin:0 0 8px;color:var(--muted);font-family:var(--font-meta);font-size:10px;letter-spacing:.1em;text-transform:uppercase}
.form input,.form textarea{display:block;width:100%;margin:0 0 30px;padding:7px 0 11px;border:0;border-bottom:1px solid rgba(241,238,231,.24);border-radius:0;background:transparent;color:var(--paper);outline:0;resize:vertical;transition:border-color .2s}
.form input:focus,.form textarea:focus{border-color:var(--gold)}
.form button{margin-top:3px;border:0;border-bottom:1px solid rgba(241,238,231,.6);padding:0 0 7px;background:none;color:var(--paper);cursor:pointer;font-size:14px;letter-spacing:.08em;transition:color .2s,border-color .2s}
.form button:hover{color:var(--gold);border-color:var(--gold)}

footer{border-top:1px solid rgba(241,238,231,.12);padding:36px 0 48px;background:var(--night)}
.foot{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;color:var(--muted);font-size:12px}
.foot .brand{font-size:13px;color:var(--paper)}
.foot .brand em{font-size:10px}
.foot p{margin-top:10px}
.foot-meta{font-family:var(--font-meta);font-size:10px;letter-spacing:.1em;line-height:2;text-align:right}

@media (max-width:900px){
  .nav-in,.wrap{width:min(100% - 44px,1240px)}
  .nav-in{min-height:74px;gap:18px}
  .brand{gap:8px;font-size:12px;letter-spacing:.12em}
  .brand em{font-size:10px}
  .nav-right{gap:15px}
  .nav-links{gap:16px;font-size:9px}
  .lang-switcher button{padding:4px}
  .hero-copy{left:22px;top:37%;width:calc(100% - 66px);transform:none}
  .hero-kicker{font-size:9px;line-height:1.6}
  .hero-copy h1{font-size:clamp(30px,8vw,46px);line-height:1.22}
  .hero-lead{margin-top:20px;font-size:13px;line-height:1.8}
  .hero-link{margin-top:25px;font-size:13px}
  .hero-meta{left:22px;bottom:28px;font-size:8px;gap:4px;max-width:calc(100% - 70px)}
  .hero-scroll{right:16px;bottom:28px;font-size:8px;gap:9px}
  .hero-scroll i{height:36px}
  .page-head{padding:112px 0 48px}
  .page-head .horizon{top:17px}
  .page-title{font-size:clamp(38px,11vw,54px)}
  .sec-lead{font-size:14px}
  .section{padding:56px 0 80px}
  .filters{gap:19px;margin-bottom:32px}
  .chip{font-size:12px;padding-bottom:12px}
  .lib{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 14px}
  .lib-thumb{aspect-ratio:4 / 3}
  .lib-body{display:block;min-height:58px;padding-top:10px}
  .lib-body h3{font-size:12px;line-height:1.5}
  .lib-body span{display:block;margin-top:4px;font-size:8px}
  .cases-contact{display:block;margin-top:72px;font-size:13px}
  .cases-contact .tlink{display:inline-block;margin-top:15px}
  .contact-grid{grid-template-columns:1fr;gap:58px}
  .contact-intro h2{font-size:32px}
  .form{padding-top:0}
  .foot{display:block}
  .foot-meta{text-align:left;margin-top:24px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .hero-bg,.hero::before,.nav,.hero-kicker,.hero-copy h1,.hero-lead,.hero-link,.hero-meta,.hero-scroll{animation:none}
  *{transition:none!important}
}


/* Protected video preview: the file stays inside the branded player. */
.horizon-video-modal[hidden]{display:none}
.horizon-video-modal{position:fixed;inset:0;z-index:100;background:rgba(5,9,13,.94);display:grid;place-items:center;padding:24px}
.horizon-video-modal__backdrop{position:absolute;inset:0}
.horizon-video-modal__dialog{position:relative;z-index:1;width:min(1080px,100%);max-height:calc(100vh - 48px);background:#0b1218;border:1px solid rgba(241,238,231,.18);box-shadow:0 24px 80px rgba(0,0,0,.5)}
.horizon-video-modal__close{position:absolute;right:12px;top:8px;z-index:5;width:36px;height:36px;border:0;background:rgba(5,9,13,.78);color:#fffdf8;font-size:26px;line-height:1;cursor:pointer}
.horizon-video-modal__stage{position:relative;display:grid;place-items:center;background:#05090d;min-height:240px;max-height:calc(100vh - 132px);overflow:hidden}
.horizon-video-modal__stage video{display:block;width:100%;height:auto;max-height:calc(100vh - 132px);object-fit:contain;background:#05090d;-webkit-user-select:none;user-select:none}
.horizon-video-modal__watermark{position:absolute;left:50%;top:50%;z-index:2;transform:translate(-50%,-50%);pointer-events:none;color:rgba(255,255,255,.34);font-family:Arial,sans-serif;font-size:clamp(1.5rem,4vw,2.8rem);font-weight:800;letter-spacing:.32em;text-shadow:0 1px 10px rgba(0,0,0,.22)}
.horizon-video-modal__footer{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 18px;color:var(--paper);font-size:14px}
.horizon-video-modal__footer button{border:1px solid var(--gold);background:var(--gold);color:var(--night);padding:8px 14px;cursor:pointer;font-size:13px}
.video-modal-open{overflow:hidden}
.horizon-video-modal video::-webkit-media-controls-download-button{display:none!important}
.horizon-video-modal video::-internal-media-controls-download-button{display:none!important}
@media (max-width:600px){.horizon-video-modal{padding:10px}.horizon-video-modal__dialog{max-height:calc(100vh - 20px)}.horizon-video-modal__stage{max-height:calc(100vh - 76px)}.horizon-video-modal__stage video{max-height:calc(100vh - 76px)}.horizon-video-modal__footer{padding:10px 12px;font-size:12px}}

/* Original image / model result comparison */
.horizon-comparison-modal{position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:28px;background:rgba(0,0,0,.78)}
.horizon-comparison-modal[hidden]{display:none}
.horizon-comparison-backdrop{position:absolute;inset:0}
.horizon-comparison-dialog{position:relative;width:min(1120px,94vw);max-height:92vh;padding:24px;background:#0b1218;border:1px solid rgba(241,238,231,.2);box-shadow:0 24px 80px rgba(0,0,0,.5)}
.horizon-comparison-close{position:absolute;right:14px;top:10px;z-index:4;border:0;background:none;color:var(--paper);font-size:28px;line-height:1;cursor:pointer}
.horizon-comparison-heading{display:flex;align-items:baseline;justify-content:space-between;gap:18px;padding:0 40px 16px 0;color:var(--white);font-size:18px}
.horizon-comparison-heading small{color:var(--gold);font-family:var(--font-meta);font-size:9px;letter-spacing:.12em}
.horizon-comparison-stage{position:relative;display:grid;place-items:center;min-height:280px;max-height:72vh;overflow:hidden;background:#05090d;isolation:isolate}
.horizon-comparison-stage img{display:block;width:100%;height:auto;max-height:72vh;object-fit:contain}
.horizon-comparison-after{position:relative;z-index:1}
.horizon-comparison-before-clip{position:absolute;inset:0;width:100%;overflow:hidden;z-index:2;clip-path:inset(0 50% 0 0)}
.horizon-comparison-before{position:absolute;inset:0;width:100%!important;height:100%!important;max-height:none!important;object-fit:contain}
.horizon-comparison-divider{position:absolute;top:0;bottom:0;left:50%;z-index:3;width:2px;background:var(--gold);box-shadow:0 0 16px rgba(0,0,0,.8);pointer-events:none;transition:left .08s linear}
.horizon-comparison-divider span{position:absolute;top:50%;left:50%;display:grid;place-items:center;width:38px;height:38px;transform:translate(-50%,-50%);border:1px solid var(--white);border-radius:50%;background:var(--gold);color:var(--night);font-size:18px}
.horizon-comparison-range{position:absolute;inset:0;z-index:4;width:100%;height:100%;margin:0;opacity:0;cursor:ew-resize}
.horizon-comparison-caption{display:flex;justify-content:space-between;padding-top:12px;color:var(--muted);font-family:var(--font-meta);font-size:9px;letter-spacing:.08em}
.comparison-modal-open{overflow:hidden}
@media (max-width:640px){
  .horizon-comparison-modal{padding:12px}
  .horizon-comparison-dialog{width:100%;padding:16px}
  .horizon-comparison-heading{font-size:15px}
  .horizon-comparison-stage{min-height:220px}
}