/* QSU 共创页：沿用官网近黑壳层，珠宝线用金色点缀 */

body.qsu-page{
  --qsu-accent:var(--gold);
  --qsu-accent-soft:rgba(255,184,0,.12);
  --qsu-max:var(--wrap);
  background:var(--bg);
  color:var(--text);
}
body.qsu-page .qsu-container{
  width:100%;max-width:var(--wrap);margin:0 auto;padding:0 32px;
}

.qsu-subnav{
  position:sticky;top:70px;z-index:60;
  background:rgba(10,14,20,.92);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.qsu-subnav-inner{
  display:flex;align-items:center;gap:8px;
  width:100%;max-width:var(--wrap);margin:0 auto;padding:0 32px;
  overflow-x:auto;scrollbar-width:none;
}
.qsu-subnav-inner::-webkit-scrollbar{display:none}
.qsu-back{
  flex:none;margin-right:4px;padding:16px 12px 16px 0;
  font-size:13px;color:var(--text-soft);white-space:nowrap;
  border-bottom:2px solid transparent;
}
.qsu-back:hover{color:var(--gold)}
.qsu-logo{
  flex:none;margin-right:12px;padding:16px 0;
  font-family:var(--ff-display);font-size:14px;font-weight:700;letter-spacing:.12em;
  color:#fff;white-space:nowrap;
}
.qsu-logo small{display:none}
.qsu-links{display:flex;align-items:stretch;gap:4px}
.qsu-links a{
  flex:none;padding:16px 14px;font-size:14px;color:var(--text-soft);
  border-bottom:2px solid transparent;white-space:nowrap;
}
.qsu-links a:hover,.qsu-links a.active{color:#fff}
.qsu-links a.active{border-bottom-color:var(--gold)}
.qsu-nav-cta{
  margin-left:auto;flex:none;align-self:center;
  min-height:36px;padding:0 16px;border:1px solid var(--gold);
  background:var(--gold);color:#141414;
  font-family:var(--ff-display);font-size:13px;font-weight:600;white-space:nowrap;
}
.qsu-nav-cta:hover,.qsu-nav-cta.active{background:#ffd15a;color:#141414}

.qsu-hero{
  position:relative;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;
  min-height:min(780px,100vh);padding:calc(var(--header-h) + 36px) 0 72px;overflow:hidden;
  background:radial-gradient(ellipse 55% 70% at 82% 28%,rgba(255,184,0,.1),transparent 62%),var(--grad-dark);
  border-bottom:1px solid var(--line);
}
.qsu-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.42;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:linear-gradient(90deg,transparent 0%,#000 36%,#000 100%);
}
.qsu-hero-copy{
  position:relative;z-index:1;
  padding:40px 8vw 40px max(32px,calc((100vw - var(--wrap)) / 2 + 32px));
}
.qsu-eyebrow{
  display:inline-flex;align-items:center;gap:12px;
  font-family:var(--ff-display);font-size:13px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--cyan);margin-bottom:22px;
}
.qsu-eyebrow::before{content:"";width:34px;height:2px;background:var(--cyan);flex:none}
.qsu-hero h1,.qsu-section-title,.qsu-work-title,.qsu-form-step h3,.qsu-faq-q,.qsu-footer-brand,.qsu-edu-panel h3,.qsu-model-card h3,.qsu-process-title,.qsu-story-quote{
  font-family:var(--ff-display);font-weight:700;letter-spacing:.01em;
}
.qsu-hero h1{font-size:clamp(40px,5.6vw,76px);line-height:1.08;color:#fff;margin:0 0 18px}
.qsu-hero-sub{font-size:clamp(18px,2vw,26px);line-height:1.55;max-width:590px;margin:0 0 22px;color:var(--text)}
.qsu-disclosure{
  font-size:14px;line-height:1.9;color:var(--text-soft);max-width:610px;
  padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.qsu-hero-actions{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.qsu-btn{
  display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;
  border:1px solid var(--line-strong);border-radius:0;font-size:14px;font-weight:600;
  font-family:var(--ff-display);cursor:pointer;transition:.25s;background:transparent;color:var(--text);
}
.qsu-btn.primary{background:var(--gold);border-color:var(--gold);color:#141414}
.qsu-btn.primary:hover{background:#ffd15a;color:#141414;transform:translateY(-2px)}
.qsu-btn.secondary:hover{border-color:var(--gold);color:var(--gold)}
.qsu-hero-visual{position:relative;z-index:1;min-height:460px;padding:40px max(32px,calc((100vw - var(--wrap)) / 2 + 32px)) 40px 24px}
.qsu-hero-jewel{
  position:relative;height:100%;min-height:420px;overflow:hidden;
  border:1px solid var(--line-strong);background:#07090d;box-shadow:var(--shadow);
}
.qsu-hero-jewel img{width:100%;height:100%;object-fit:cover;display:block;min-height:420px}
.qsu-hero-jewel[data-empty="true"] img{display:none}
.qsu-floating-note{
  position:absolute;right:max(40px,calc((100vw - var(--wrap)) / 2 + 48px));bottom:56px;
  padding:10px 14px;background:rgba(10,14,20,.82);border:1px solid var(--line-strong);
  font-size:12px;letter-spacing:.08em;color:var(--text-soft);
}

.qsu-section{padding:96px 0;scroll-margin-top:140px}
.qsu-section-head{display:flex;justify-content:space-between;gap:50px;align-items:end;margin-bottom:48px}
.qsu-section-head:not(:has(.qsu-section-intro)){margin-bottom:40px}
.qsu-kicker{
  font-family:var(--ff-display);font-size:13px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--cyan);margin-bottom:12px;
}
.qsu-section-title{font-size:clamp(28px,3.6vw,48px);line-height:1.2;margin:0;color:#fff}
.qsu-section-intro{max-width:520px;color:var(--text-soft);font-size:15px;line-height:1.85}

.qsu-model{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.qsu-model-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.qsu-model-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:36px 30px;min-height:240px;transition:border-color .3s,transform .3s;
}
.qsu-model-card:hover{border-color:var(--line-strong);transform:translateY(-4px)}
.qsu-model-no{font-family:var(--ff-mono);font-size:12px;letter-spacing:.12em;color:var(--gold)}
.qsu-model-card h3{font-size:20px;margin:18px 0 12px;color:#fff}
.qsu-model-card p{font-size:14px;color:var(--text-soft);margin:0;line-height:1.85}
.qsu-model-line{margin-top:28px;height:2px;background:var(--gold);width:36px;opacity:.7}

.qsu-works{background:var(--bg)}
.qsu-series-label{
  text-align:center;font-family:var(--ff-display);font-size:12px;letter-spacing:.28em;
  color:var(--text-dim);margin:-12px 0 36px;
}
.qsu-work{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  padding:48px 0;border-top:1px solid var(--line);
}
.qsu-work:nth-of-type(even){direction:rtl}
.qsu-work:nth-of-type(even)>*{direction:ltr}
.qsu-work-image{
  position:relative;min-height:460px;display:flex;align-items:center;justify-content:center;overflow:hidden;
  border:1px solid var(--line-strong);background:#07090d;
}
.qsu-work-image img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.qsu-work-image span{font-size:11px;letter-spacing:.2em;color:var(--text-dim);position:relative;z-index:1}
.qsu-render-tag{
  position:absolute;top:14px;left:14px;z-index:2;
  background:rgba(10,14,20,.82);border:1px solid var(--line-strong);
  font-size:11px;color:var(--text-soft);letter-spacing:.08em;padding:4px 10px;
}
.qsu-work-info{padding:12px 0;display:flex;flex-direction:column;justify-content:center}
.qsu-work-code{font-family:var(--ff-mono);font-size:12px;letter-spacing:.16em;color:var(--gold)}
.qsu-work-title{font-size:34px;margin:12px 0 14px;color:#fff}
.qsu-work-title small{
  display:block;font-family:var(--ff-body);font-size:13px;color:var(--text-soft);
  letter-spacing:.06em;margin-top:8px;font-weight:400;
}
.qsu-work-desc{font-size:15px;color:var(--text-soft);max-width:500px;line-height:1.85}
.qsu-specs{margin:24px 0 18px;display:flex;flex-wrap:wrap;gap:8px;max-width:520px}
.qsu-spec{border:1px solid var(--line-strong);padding:6px 12px;font-size:12.5px;color:var(--text)}
.qsu-custom-label{font-size:12px;letter-spacing:.14em;color:var(--text-dim);margin-bottom:10px}
.qsu-tags{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 28px}
.qsu-tag{border:1px solid rgba(255,184,0,.35);padding:5px 10px;font-size:11px;color:var(--gold)}
.qsu-works .qsu-btn.secondary{border-color:var(--line-strong);color:var(--text)}
.qsu-works .qsu-btn.secondary:hover{border-color:var(--gold);color:var(--gold);background:transparent}

.qsu-process{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.qsu-process-list{border-top:1px solid var(--line)}
.qsu-process-item{
  display:grid;grid-template-columns:82px 220px 1fr;gap:28px;
  padding:28px 0;border-bottom:1px solid var(--line);align-items:start;
}
.qsu-process-no{font-family:var(--ff-display);font-size:32px;color:rgba(201,205,210,.32);line-height:1}
.qsu-process-title{font-size:20px;color:#fff}
.qsu-process-item p{margin:0;color:var(--text-soft);font-size:14.5px;line-height:1.85}

.qsu-education{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:48px;align-items:start}
.qsu-education:empty{display:none}
.qsu-edu-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);padding:28px 26px}
.qsu-edu-panel h3{font-size:24px;margin:0 0 14px;color:#fff}
.qsu-edu-panel p{font-size:14.5px;color:var(--text-soft);line-height:1.85}
.qsu-edu-fact{margin-top:24px;padding:16px 18px;background:var(--qsu-accent-soft);border-left:3px solid var(--gold);font-size:13.5px;color:var(--text-soft)}
.qsu-edu-fact strong{display:block;font-family:var(--ff-display);font-size:16px;font-weight:600;color:#fff;margin-bottom:6px}

.qsu-story{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.qsu-story-inner{display:grid;grid-template-columns:.8fr 1.2fr;gap:72px}
.qsu-story-quote{font-size:clamp(26px,3.2vw,42px);line-height:1.4;margin:0;color:#fff}
.qsu-story-copy{color:var(--text-soft);font-size:15.5px;line-height:1.9}
.qsu-story-prompt{
  margin-top:28px;border:1px solid var(--line);padding:22px 24px;
  background:rgba(255,184,0,.05);white-space:pre-line;
}

.qsu-faq{border-top:1px solid var(--line)}
.qsu-faq-item{border-bottom:1px solid var(--line)}
.qsu-faq-q{
  display:flex;justify-content:space-between;gap:20px;padding:22px 0;cursor:pointer;
  font-size:18px;width:100%;background:none;border:0;text-align:left;color:#fff;
}
.qsu-faq-a{display:none;padding:0 0 22px;color:var(--text-soft);font-size:14.5px;max-width:850px;line-height:1.85}
.qsu-faq-item.open .qsu-faq-a{display:block}
.qsu-plus{font-family:var(--ff-body);color:var(--gold)}

.qsu-form-section{background:var(--bg-soft);border-top:1px solid var(--line)}
.qsu-form-section .qsu-section-intro{color:var(--text-soft)}
.qsu-form-wrap{
  max-width:860px;border:1px solid rgba(255,184,0,.28);
  background:linear-gradient(180deg,rgba(255,184,0,.06),transparent 140px),var(--surface);
  padding:36px 32px 40px;
}
.qsu-progress{display:flex;gap:8px;margin-bottom:36px}
.qsu-progress span{height:2px;background:var(--line-strong);flex:1}
.qsu-progress span.active{background:var(--gold)}
.qsu-form-step{display:none}
.qsu-form-step.active{display:block}
.qsu-form-step h3{font-size:26px;margin:0 0 8px;color:#fff}
.qsu-form-step .qsu-hint{font-size:13px;color:var(--text-dim);margin-bottom:26px}
.qsu-fields{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.qsu-field.full{grid-column:1/-1}
.qsu-form-section label{display:block;font-size:13px;color:var(--text-soft);margin-bottom:7px}
.qsu-form-section input,.qsu-form-section select,.qsu-form-section textarea{
  width:100%;border:1px solid var(--line-strong);background:rgba(7,9,13,.65);color:var(--text);
  padding:13px 14px;outline:none;border-radius:0;
}
.qsu-form-section textarea{min-height:140px;resize:vertical}
.qsu-form-section input:focus,.qsu-form-section select:focus,.qsu-form-section textarea:focus{border-color:var(--gold)}
.qsu-checks{display:grid;gap:10px;margin-top:22px}
.qsu-check{display:flex;gap:10px;align-items:flex-start;color:var(--text-soft);font-size:13px}
.qsu-check input{width:15px;margin-top:4px;flex:none;accent-color:var(--gold)}
.qsu-multi{display:flex;flex-wrap:wrap;gap:10px 16px;margin-top:4px}
.qsu-multi-item{display:inline-flex;align-items:center;gap:8px;color:var(--text-soft);font-size:14px;cursor:pointer}
.qsu-multi-item input{width:15px;flex:none;accent-color:var(--gold)}
.qsu-form-actions{display:flex;justify-content:space-between;margin-top:30px;gap:12px}
.qsu-form-actions .qsu-btn{color:var(--text);border-color:var(--line-strong);background:transparent}
.qsu-form-actions .qsu-btn.primary{border-color:var(--gold);background:var(--gold);color:#141414}
.qsu-form-error{min-height:1.4em;margin-top:16px;font-size:13px;color:#f0c4c4}
.qsu-form-success{display:none;text-align:center;padding:56px 20px;border:1px solid var(--line)}
.qsu-form-success h3{font-size:28px;margin:0 0 12px;color:#fff}
.qsu-form-success p{color:var(--text-soft)}
.qsu-guestbook-host{display:none}

.qsu-page-footer{
  padding:48px 0 28px;background:var(--surface);color:var(--text-dim);
  border-top:1px solid var(--line);
}
.qsu-footer-brand{font-size:20px;color:#fff;margin-bottom:16px}
.qsu-page-footer p{font-size:12.5px;line-height:1.9;margin:4px 0;color:var(--text-dim)}

.qsu-data{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

@media(max-width:1024px){
  .qsu-subnav{top:var(--header-h)}
}
@media(max-width:900px){
  .qsu-links{display:none}
  .qsu-container,.qsu-subnav-inner{padding:0 20px}
  .qsu-hero{grid-template-columns:1fr;min-height:auto;padding:calc(var(--header-h) + 28px) 0 36px}
  .qsu-hero-copy{padding:24px 20px 12px}
  .qsu-hero-visual{min-height:auto;padding:12px 20px 28px}
  .qsu-hero-jewel,.qsu-hero-jewel img{min-height:280px}
  .qsu-floating-note{right:28px;bottom:40px}
  .qsu-model-grid{grid-template-columns:1fr}
  .qsu-section{padding:72px 0}
  .qsu-section-head{display:block;margin-bottom:32px}
  .qsu-section-intro{margin-top:16px}
  .qsu-work,.qsu-education,.qsu-story-inner{grid-template-columns:1fr}
  .qsu-work{min-height:auto;gap:20px}
  .qsu-work:nth-of-type(even){direction:ltr}
  .qsu-work-image{min-height:52vh}
  .qsu-work-info{padding:8px 0 28px}
  .qsu-process-item{grid-template-columns:60px 1fr;gap:10px 20px}
  .qsu-process-item p{grid-column:2}
  .qsu-fields{grid-template-columns:1fr}
  .qsu-field.full{grid-column:auto}
  .qsu-story-inner{gap:28px}
  .qsu-form-wrap{padding:24px 18px 28px}
}
@media(max-width:520px){
  .qsu-hero h1{font-size:40px}
  .qsu-work-title{font-size:28px}
  .qsu-form-actions{gap:10px}
  .qsu-nav-cta{font-size:12px;padding:0 12px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .qsu-btn,.qsu-nav-cta,.qsu-model-card{transition:none;transform:none}
}