:root{--bg:#0b0c10;--surface:#111318;--text:#e6e7ea;--muted:#a9aebb;--accent:#4fc3f7;--accent-2:#8e44ad;--trunk:#39424e;--branch-gap:24px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,PingFang SC,Hiragino Sans,Microsoft YaHei,Arial,sans-serif;background:var(--bg);color:var(--text)}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:10;background:linear-gradient(180deg,rgba(17,19,24,.95),rgba(17,19,24,.85));-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);padding:16px 20px 12px;border-bottom:1px solid #20232a}.topbar h1{margin:0 0 10px;font-size:20px}.input-panel{display:grid;grid-template-columns:1fr auto;grid-gap:10px;gap:10px;align-items:end}textarea.input{width:100%;min-height:64px;max-height:160px;padding:12px 12px 36px;border-radius:10px;border:1px solid #2a2f38;background:var(--surface);color:var(--text);resize:vertical}.input-actions{display:flex;align-items:center;gap:12px}.counter{color:var(--muted);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.primary-btn{padding:10px 14px;border:none;border-radius:8px;background:var(--accent);color:#0b0c10;font-weight:600;cursor:pointer}.primary-btn:disabled{opacity:.5;cursor:not-allowed}.danger-btn{padding:6px 10px;border:1px solid #4a1f24;border-radius:8px;background:#c0392b;color:#fff;font-weight:600;cursor:pointer}.danger-btn:hover{background:#e74c3c}.danger-btn:disabled{opacity:.6;cursor:not-allowed}.scroll-actions{margin-top:10px;display:flex;gap:8px}.scroll-actions button{padding:8px 10px;border-radius:8px;border:1px solid #2a2f38;background:#13161c;color:var(--text);cursor:pointer}.scroll-actions button:hover{border-color:#3a4150}main{padding:20px}.timeline{position:relative;padding:10px 0 40px;scroll-snap-type:y proximity}.timeline:before{content:"";position:absolute;left:50%;top:0;bottom:0;width:4px;transform:translateX(-2px);background:linear-gradient(180deg,var(--trunk),#2a3038 60%,var(--trunk))}.timeline-item{position:relative;min-height:90px;padding:20px 0;scroll-snap-align:start}.timeline-item .marker{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:12px;height:12px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(79,195,247,.15)}.timeline-item .content{position:absolute;top:50%;transform:translateY(-50%);width:min(520px,40vw);background:#141821;border:1px solid #252b36;border-radius:12px;padding:14px 16px;box-shadow:0 8px 20px rgba(0,0,0,.25)}.timeline-item .content .danger-btn{position:absolute;top:10px;right:10px}.timeline-item.left .content{left:calc(50% - (min(520px, 40vw) + var(--branch-gap)))}.timeline-item.right .content{left:calc(50% + var(--branch-gap))}.timeline-item .content:before{content:"";position:absolute;top:50%;width:var(--branch-gap);height:2px;background:var(--trunk)}.timeline-item.left .content:before{right:-24px}.timeline-item.right .content:before{left:-24px}.text{white-space:pre-wrap;word-wrap:break-word;line-height:1.5}.meta{margin-top:8px;font-size:12px}.empty,.meta{color:var(--muted)}.empty{text-align:center;padding:40px 0}@media (max-width:680px){.timeline-item .content{width:min(520px,80vw)}.timeline-item.left .content{left:calc(50% - (min(520px, 80vw) + var(--branch-gap)))}}:root{--bg:#14110f;--surface:#1c1a17;--text:#ede7e3;--muted:#b8aea3;--accent:#ffb74d;--accent-2:#ff8a65;--trunk:#6b4f3d}body{background:radial-gradient(800px circle at 50% 120px,#1b1815 0,var(--bg) 60%)}.topbar{border-bottom:1px solid #3a312b;background:linear-gradient(180deg,rgba(28,26,23,.95),rgba(28,26,23,.85))}.topbar-row{display:flex;align-items:center;justify-content:space-between;gap:12px}textarea.input{border-color:#3c332d}.primary-btn{color:#2a211b}.scroll-actions button{border-color:#3c332d;background:#201d19}.auth-actions{margin-left:auto;display:inline-flex;align-items:center;gap:10px}.top-link{color:var(--text);text-decoration:none;padding:6px 8px;border-radius:8px;border:1px solid #3c332d;background:#201d19;font-family:inherit;font-size:inherit}.top-link:hover{background:#2a2521}.user-chip{display:inline-flex;align-items:center;gap:8px;padding:6px 8px;background:#201d19;border:1px solid #3c332d;border-radius:12px}.avatar{width:24px;height:24px;border-radius:50%;background:#332e29;border:1px solid #3c332d;object-fit:cover}.user-profile-container{position:relative}.user-menu{position:absolute;top:calc(100% + 8px);right:0;background:#201d19;border:1px solid #3c332d;border-radius:12px;padding:12px;width:260px;box-shadow:0 10px 24px rgba(32,28,24,.45);z-index:100}.user-menu .row{display:flex;align-items:center;gap:8px;margin-bottom:10px}.edit-btn{border:1px solid #3c332d;background:#2a2521;color:#ffb74d;border-radius:8px;padding:4px 6px;cursor:pointer}.edit-btn:hover{background:#332e29}.user-menu input[type=text]{flex:1 1;padding:8px 10px;border-radius:8px;border:1px solid #3c332d;background:#1c1a17;color:var(--text)}.user-menu .actions{display:flex;justify-content:space-between;gap:10px}.auth-hint .primary-btn{background:#ffb74d;color:#2a211b}.debug-panel{background:#201d19;border:1px solid #3c332d;border-radius:12px;padding:10px 12px}.topbar .topbar-row{padding:0 20px}.topbar .topbar-row,main{max-width:960px;margin:0 auto}main{padding:24px 20px}.input-panel{margin:12px 0 18px}.timeline:before{background:linear-gradient(180deg,var(--trunk),#4c3a2d 60%,var(--trunk));box-shadow:0 0 20px rgba(255,183,77,.08)}.timeline-item .marker{box-shadow:0 0 0 4px rgba(255,183,77,.18)}.timeline{--cardW:calc(50% - var(--branch-gap))}.timeline-item .content{width:min(520px,var(--cardW));background:#1e1b19;border:1px solid #3c332d;box-shadow:0 10px 24px rgba(32,28,24,.45)}.timeline-item.left .content{left:calc(50% - (min(520px, var(--cardW)) + var(--branch-gap)))}.close-btn{opacity:0;pointer-events:none;transition:opacity .16s ease-in-out;position:absolute;top:10px;right:10px;width:28px;height:28px;border-radius:8px;border:1px solid #3c332d;background:#2a2521;color:#ffb74d;display:flex;align-items:center;justify-content:center;font-size:16px;line-height:1}.close-btn:hover{border-color:#4c4138;background:#332e29}.close-btn:disabled{opacity:.6;cursor:not-allowed}.timeline-item:focus-within .content .close-btn,.timeline-item:hover .content .close-btn{opacity:1;pointer-events:auto}@media (hover:none){.timeline-item .content .close-btn{opacity:1;pointer-events:auto}}@media (max-width:680px){.timeline-item .content{width:min(520px,calc(100% - 40px))}.timeline-item.left .content{left:calc(50% - (min(520px, calc(100% - 40px)) + var(--branch-gap)))}}.lang-toggle{display:inline-flex;gap:8px;align-items:center;background:#201d19;border:1px solid #3c332d;border-radius:10px;padding:6px 8px}.lang-toggle button{background:transparent;color:var(--text);border:none;padding:4px 8px;border-radius:6px;cursor:pointer}.lang-toggle button.active{background:#2a2521;color:#ffb74d}.content-wrap{max-width:960px;margin:0 auto;padding:0 20px}.timeline-item .content .text{overflow-wrap:anywhere;word-break:break-word}