/* 个人肖像作为开场的一部分：保留正式感，但以创作视觉而非普通证件照呈现。 */
.portrait-frame{position:absolute;z-index:2;left:26%;top:15%;width:47%;height:75%;overflow:hidden;border:2px solid rgba(255,255,255,.78);border-radius:999px 999px 16px 16px;background:#fff;box-shadow:0 17px 36px rgba(0,0,0,.23);transform:rotate(-3deg);transition:transform .8s cubic-bezier(.22,1,.36,1),box-shadow .8s cubic-bezier(.22,1,.36,1)}
.portrait-frame img{display:block;width:100%;height:100%;object-fit:cover;object-position:center 15%;filter:contrast(1.04) saturate(.92);transition:transform .8s cubic-bezier(.22,1,.36,1)}
.hero-art:hover .portrait-frame{transform:rotate(-1deg) translateY(-5px);box-shadow:0 24px 42px rgba(0,0,0,.3)}
.hero-art:hover .portrait-frame img{transform:scale(1.035)}
@media(max-width:800px){.portrait-frame{left:26%;top:15%;width:47%;height:75%}}
@media(prefers-reduced-motion:reduce){.portrait-frame,.portrait-frame img{transition:none!important}}