:root{color-scheme:light;font-family:PingFang SC,Microsoft YaHei,system-ui,sans-serif;color:#16181d;background:#f6f4ef}*{box-sizing:border-box}body{margin:0;min-width:320px;background:linear-gradient(180deg,rgba(231,25,25,.08),transparent 280px),#f6f4ef}a{color:inherit;text-decoration:none}button{font:inherit}.share-page{width:min(760px,100%);margin:0 auto;padding:16px 16px 112px}.topbar{min-height:52px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:900}.brand img{width:34px;height:34px;border-radius:8px}.ghost-button{border:1px solid rgba(231,25,25,.24);background:#fff;color:#c91515;border-radius:999px;padding:8px 14px;font-size:14px;font-weight:800}.state-panel,.content-shell,.app-panel{background:#fffffff5;border:1px solid rgba(88,74,56,.1);border-radius:8px;box-shadow:0 18px 50px #502b1214}.state-panel{margin-top:28px;padding:44px 22px;text-align:center}.state-panel h1{margin:0 0 10px;font-size:22px}.state-panel p{margin:0;color:#6b625a}.loading-mark{width:32px;height:32px;margin:0 auto 16px;border:3px solid rgba(231,25,25,.18);border-top-color:#e71919;border-radius:50%;animation:spin .8s linear infinite}.content-shell{margin-top:18px;padding:20px}.content-label{display:inline-flex;margin-bottom:14px;padding:4px 10px;border-radius:999px;background:#e7191917;color:#c91515;font-size:13px;font-weight:900}.cover-image{width:100%;max-height:320px;object-fit:cover;border-radius:8px;margin-bottom:18px;background:#eee}.content-shell h1{margin:0;font-size:clamp(25px,7vw,38px);line-height:1.16;letter-spacing:0}.meta-line{display:flex;flex-wrap:wrap;gap:8px 12px;margin-top:14px;color:#81766b;font-size:13px}.match-strip{margin:20px 0 6px;padding:14px;display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center;border-radius:8px;background:#fff7f1}.match-strip div:last-child{text-align:right}.match-strip small{display:block;color:#8e8276;font-size:12px;margin-bottom:5px}.match-strip strong{display:block;font-size:15px}.match-strip b{color:#e71919}.article-body{margin-top:24px;color:#2d3138;font-size:17px;line-height:1.82;overflow-wrap:anywhere}.article-body :first-child{margin-top:0}.article-body img{max-width:100%;height:auto;border-radius:8px}.plain-body{white-space:pre-wrap}.external-article{margin-top:24px;padding:18px;border:1px solid rgba(231,25,25,.16);border-radius:8px;background:#fff7f1}.external-article p{margin:0;color:#5d5248;font-size:16px;line-height:1.7}.external-link-button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;margin-top:14px;padding:0 18px;border-radius:8px;background:#e71919;color:#fff;font-weight:900}.empty-body{margin:24px 0 0;color:#81766b;font-size:15px}.app-panel{margin-top:16px;padding:18px;display:grid;gap:14px;background:#16181d;color:#fff}.app-panel span{color:#ffb4a8;font-size:13px;font-weight:900}.app-panel h2{margin:6px 0 0;font-size:21px;line-height:1.28}.primary-button,.secondary-button{display:inline-flex;justify-content:center;align-items:center;min-height:44px;border-radius:8px;padding:0 16px;font-weight:900}.primary-button{border:0;background:#e71919;color:#fff}.secondary-button{border:1px solid rgba(255,255,255,.2);background:#ffffff14;color:#fff}.state-panel .secondary-button{border-color:#e7191933;color:#c91515;background:#fff}.download-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(148px,1fr));gap:10px}.hint-text{margin:0;color:#d8d4ce;font-size:13px}.teacher-float{position:fixed;left:max(12px,calc((100vw - 760px)/2 + 12px));right:max(12px,calc((100vw - 760px)/2 + 12px));bottom:max(12px,env(safe-area-inset-bottom));z-index:30;display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:10px;align-items:center;padding:10px;border:1px solid rgba(22,24,29,.08);border-radius:8px;background:#fffffff5;box-shadow:0 14px 42px #16181d2e;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.teacher-avatar{width:44px;height:44px;border-radius:50%;object-fit:cover;background:#f3eee9}.teacher-avatar.placeholder{display:inline-flex;align-items:center;justify-content:center;color:#e71919;font-weight:900}.teacher-copy{min-width:0;display:grid;gap:3px}.teacher-copy strong,.teacher-copy span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.teacher-copy strong{font-size:15px;line-height:1.2}.teacher-copy span{color:#81766b;font-size:12px}.teacher-action{min-width:76px;min-height:36px;border:0;border-radius:999px;background:#e71919;color:#fff;font-size:13px;font-weight:900}@keyframes spin{to{transform:rotate(360deg)}}@media (min-width: 720px){.share-page{padding-top:24px;padding-bottom:118px}.content-shell{padding:30px}.app-panel{grid-template-columns:1fr auto;align-items:center}.app-panel .download-row,.app-panel .hint-text{grid-column:1 / -1}}