:root{--navy:#001936}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-snap-type:y mandatory;background:#eef6ff}body{margin:0;overflow-x:hidden;background:#eef6ff;font-family:Arial,Helvetica,sans-serif}.scene{position:relative;width:100%;height:100svh;min-height:520px;overflow:hidden;scroll-snap-align:start;scroll-snap-stop:always}.scene img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;user-select:none}.scroll-rail{position:fixed;z-index:30;right:22px;top:50%;width:34px;height:min(50vh,420px);transform:translateY(-50%);color:#fff;filter:drop-shadow(0 2px 8px rgba(0,25,54,.3))}.rail-line{position:absolute;top:28px;bottom:58px;left:16px;width:1px;background:rgba(255,255,255,.55);overflow:hidden}.rail-fill{position:absolute;left:0;top:0;width:100%;height:0;background:linear-gradient(#fff,#78c9ff,#e5ae37);box-shadow:0 0 8px #fff}.light-drop{position:absolute;left:11px;top:0;width:11px;height:11px;transform:translateY(-50%);transition:top .12s linear}.light-drop i{display:block;width:100%;height:100%;border-radius:50% 50% 55% 45%;rotate:45deg;background:#fff;box-shadow:0 0 8px 2px #68c6ff,0 0 20px 5px rgba(255,255,255,.65)}.page-count{position:absolute;top:0;left:-1px;font-size:11px;font-weight:700;letter-spacing:.08em;text-shadow:0 1px 5px var(--navy)}.page-count small{font-size:8px;opacity:.78}.rail-dots{position:absolute;left:12px;bottom:0;display:flex;flex-direction:column;gap:5px}.rail-dots button{width:8px;height:8px;padding:0;border:1px solid rgba(255,255,255,.95);border-radius:50%;background:rgba(0,25,54,.3);cursor:pointer;transition:.25s}.rail-dots button.active{background:#fff;box-shadow:0 0 8px #fff;transform:scale(1.25)}@media(max-width:700px){html{scroll-snap-type:y proximity}.scene{height:auto;min-height:0;aspect-ratio:16/9}.scroll-rail{right:8px;height:40vh;transform:translateY(-50%) scale(.8);transform-origin:right center}}