/* 第18款：光带与星芒，4.4秒同步循环；装饰层不影响点击。 */
header .brand{position:relative;isolation:isolate}
header .brand-logo{position:relative;z-index:1}
.brand-motion-shine{position:absolute;inset:0;z-index:2;pointer-events:none;mask:url('/brand-gold-star-v1.png') center/100% 100%;-webkit-mask:url('/brand-gold-star-v1.png') center/100% 100%;mix-blend-mode:screen;background:linear-gradient(110deg,transparent 39%,#fff 48%,#fff7c9 52%,transparent 61%);background-size:300% 100%;opacity:0;animation:brand18-shine 4.4s ease-in-out infinite}
.brand-motion-star{position:absolute;left:15%;top:24%;z-index:3;pointer-events:none;font-size:42px;line-height:1;font-weight:400;color:#fff8c5;text-shadow:0 0 3px #af6815,0 0 12px #e8a827,0 0 25px #ffd974;opacity:0;animation:brand18-star 4.4s ease-in-out infinite}
.brand-motion-star.second{left:75%;top:57%;animation-delay:-2.2s}
@keyframes brand18-shine{0%{opacity:0;background-position:100% 0}12%,75%{opacity:1}100%{opacity:0;background-position:0% 0}}
@keyframes brand18-star{0%,100%{opacity:.12;transform:scale(.3) rotate(-20deg)}45%,55%{opacity:1;transform:scale(1.4) rotate(80deg)}}
@media(max-width:600px){.brand-motion-star{font-size:30px}}
@media(prefers-reduced-motion:reduce){.brand-motion-shine,.brand-motion-star{animation:none;opacity:0}}