* { box-sizing: border-box; }
body { margin: 0; background: #f5f5f5; color: #171717; font-family: "Microsoft YaHei", sans-serif; }
main { min-height: 100vh; }
#empty { padding: 30px; text-align: center; }
#viewer { position: relative; width: min(100%, 360px); margin: 0 auto; background: #fff; }
#page-image { display: block; max-width: 100%; margin: 0 auto; background-color: #fff; }
#back-to-catalog { position: fixed; top: 14px; right: 14px; z-index: 2; min-width: 56px; height: 34px; border: 0; border-radius: 17px; background: rgba(0, 0, 0, .65); color: #fff; font: 600 14px/1 "Microsoft YaHei", sans-serif; cursor: pointer; }
#previous, #next { position: absolute; bottom: 0; width: 50%; height: 6.2%; border: 0; background: transparent; cursor: pointer; }
#previous { left: 0; }
#next { right: 0; }
#previous:focus-visible, #next:focus-visible { outline: 3px solid #006eff; outline-offset: -5px; }
#catalog { width: min(1080px, calc(100% - 32px)); margin: 0 auto; padding: 34px 0 50px; }
.catalog-header { display: flex; align-items: end; justify-content: space-between; gap: 24px; padding-bottom: 25px; }
.catalog-header p { margin: 0 0 5px; color: #6f7c70; font-size: 14px; }
.catalog-header h1 { margin: 0; color: #184f10; font-size: 30px; line-height: 1.2; }
.search { display: flex; align-items: center; gap: 8px; color: #526452; font-size: 14px; }
.search input { width: 220px; padding: 10px 12px; border: 1px solid #cfd8cf; border-radius: 8px; background: #fff; font: inherit; }
#breadcrumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; min-height: 34px; margin-bottom: 16px; color: #5c665c; font-size: 14px; }
#breadcrumbs button { padding: 0; border: 0; background: none; color: #236b1a; font: inherit; cursor: pointer; }
#breadcrumbs button:hover { text-decoration: underline; }
#category-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.category-card { display: flex; flex-direction: column; align-items: start; min-height: 108px; padding: 17px; border: 1px solid #dbe3d9; border-radius: 11px; background: #fff; color: #173f13; text-align: left; cursor: pointer; box-shadow: 0 1px 2px rgba(0, 0, 0, .03); }
.category-card:hover { border-color: #68a55f; box-shadow: 0 4px 14px rgba(37, 101, 26, .12); }
.category-card strong { font-size: 18px; line-height: 1.4; }
.category-card small { margin-top: auto; padding-top: 12px; color: #738173; font-size: 13px; }
.empty-result { grid-column: 1 / -1; padding: 28px; color: #687468; text-align: center; }
@media (max-width: 600px) { #catalog { width: min(100% - 24px, 1080px); padding-top: 24px; } .catalog-header { align-items: stretch; flex-direction: column; gap: 14px; } .catalog-header h1 { font-size: 26px; } .search { display: grid; grid-template-columns: auto 1fr; } .search input { width: 100%; } #category-list { grid-template-columns: 1fr; } .category-card { min-height: 82px; } }