:root{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;color:#303430;background:#e9ece9;font-synthesis:none;--paper:#f8f8f5;--ink:#303430;--muted:#7d837c;--line:#e2e5dc;--green:#4b6b59;--purple:#666078}*{box-sizing:border-box}body{margin:0;min-height:100dvh;background:radial-gradient(ellipse at 50% 0,#f9faf8 0,#e9ece9 65%);padding:30px 0 20px}button,input,textarea,select{font:inherit}button{cursor:pointer;color:inherit}button:disabled{opacity:.5;cursor:wait}button:focus-visible,a:focus-visible{outline:2px solid #557861;outline-offset:4px}button{touch-action:manipulation}button,input,textarea,select{-webkit-tap-highlight-color:transparent}button{border:0;background:none}input,textarea,select{width:100%;border:1px solid #d7ddcf;border-radius:12px;background:#fff;padding:13px;color:var(--ink);font-size:16px}textarea{resize:vertical;min-height:150px;line-height:1.8}label{display:block;margin:22px 0 8px;font-size:14px}.desktop-note{display:flex;gap:10px;align-items:center;width:428px;margin:0 auto 19px;font-weight:650;font-size:15px}.desktop-note small{font-size:12px;color:var(--muted);margin-left:8px;font-weight:400}.brand-mark{display:grid;place-items:center;color:#f8f8f5;background:#506b58;border-radius:9px;width:29px;height:29px;font-family:serif}.phone{width:428px;height:min(880px,calc(100dvh - 135px));min-height:580px;margin:auto;background:var(--paper);border:7px solid #fff;border-radius:36px;box-shadow:0 24px 65px #29382718,0 0 0 1px #3141230c;position:relative;overflow:hidden}.host-header{height:61px;display:flex;align-items:center;gap:16px;margin:0 22px;border-bottom:1px solid var(--line)}.zhihu{font-size:25px;letter-spacing:-2px;color:#1670d2;font-weight:600}.host-caption{color:#606861;font-size:14px}.independent{margin-left:auto;font-size:12px;color:#8c918a;letter-spacing:.3px}main{height:calc(100% - 61px);overflow-y:auto;scrollbar-width:none;padding-bottom:95px}main::-webkit-scrollbar{display:none}.intro{padding:28px 25px 22px}.eyebrow{font-size:12px!important;letter-spacing:1.1px;color:#828b7b!important;margin:0 0 13px!important}h1{font-size:30px;font-weight:500;letter-spacing:1px;margin:0 0 12px;font-family:"Songti SC","Noto Serif CJK SC",serif}.intro>p:last-child{font-size:13px;color:var(--muted);margin:0;line-height:1.7}.directions{display:flex;background:#ecefe7;margin:0 22px;border-radius:12px;padding:4px;gap:4px}.directions button{width:50%;font-size:14px;padding:13px 4px;border-radius:9px;white-space:nowrap;color:#757d72}.directions button span{margin-left:8px}.directions button.selected{background:#fff;color:#3e5849;box-shadow:0 2px 6px #354a3110;font-weight:600}.filter-row{padding:19px 0 17px 24px;border-bottom:1px solid var(--line)}.filter-row>span{display:block;color:var(--muted);font-size:12px;margin-bottom:11px}.chips{display:flex;gap:7px;overflow-x:auto;scrollbar-width:none;padding:1px 20px 3px 0}.chips button{flex-shrink:0;font-size:13px;border:1px solid #e0e5db;border-radius:7px;padding:7px 11px;color:#7b8276}.chips button.active{border-color:#576f54;background:#576f54;color:#fff}.feed-heading{display:flex;align-items:center;justify-content:space-between;padding:20px 25px 1px;font-size:12px;color:#838979;letter-spacing:.6px}.feed-heading small{font-size:12px;letter-spacing:0}.qa-card{margin:0 25px;padding:23px 0 24px;border-bottom:1px solid var(--line)}.question-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:12px;color:#8b8794}.stage-tag{font-size:12px;background:#eeeaf3;color:#81728f;border-radius:4px;padding:4px 6px}.qa-card h2{font-size:19px;line-height:1.65;font-weight:550;color:#565065;margin:11px 0 23px;letter-spacing:.3px}.answer-meta{display:flex;gap:7px;align-items:center;font-size:12px;color:#7e8c78;margin-bottom:12px}.answer-line{width:17px;height:1px;background:#9ea995}.sample{border:1px solid #dce2d5;border-radius:4px;font-size:12px;padding:1px 4px;color:#87917f}.answer-text{font-family:"Songti SC","Noto Serif CJK SC",serif;font-size:19px;line-height:1.85;color:var(--green);margin:0 0 19px;white-space:pre-wrap;overflow-wrap:anywhere}.answer-footer{display:flex;align-items:center;justify-content:space-between;color:#8a9181;font-size:12px}.answer-footer button{padding:7px 0;font-size:12px}.answer-footer button.voted{color:#486d4c}.empty-answer{font-size:14px;color:#838c7c;line-height:1.9;padding:0 0 10px}.fab{position:absolute;right:22px;bottom:27px;width:51px;height:51px;border-radius:50%;background:#4f6958;color:#fff;box-shadow:0 5px 18px #334c332b;font-size:30px;font-weight:300;z-index:2}.profile-shortcut{position:absolute;left:22px;bottom:30px;padding:10px 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28px;color:#858d7d;font-size:14px;line-height:2}.about-samples{margin:24px 25px;color:#959b8e;font-size:12px;line-height:1.8;text-align:center}#notice{position:absolute;left:24px;right:24px;bottom:93px;background:#334736;color:#fff;border-radius:10px;padding:13px 16px;font-size:14px;z-index:5;display:none}#notice.visible{display:block}.error-inline{color:#a34343;font-size:14px;line-height:1.7}.loading{padding:35px;color:#7d837c;font-size:14px}a{color:inherit}.question-body{font-size:14px;color:#787783;line-height:1.8;white-space:pre-wrap}.detail-actions{padding:0 25px}.detail-actions .primary-button{margin-top:20px}@media(max-width:540px){body{padding:0;background:var(--paper)}.desktop-note,.desktop-footer{display:none}.phone{width:100%;height:100dvh;min-height:0;border:0;border-radius:0;box-shadow:none}.host-header{padding-top:env(safe-area-inset-top);height:calc(61px + env(safe-area-inset-top))}main{height:calc(100% - 61px - env(safe-area-inset-top))}.fab{bottom:calc(25px + 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