:root{--paper: #faf6ee;--paper-deep: #f0ead9;--ink: #2b2520;--ink-soft: #5a5048;--ink-faint: #968a7c;--seal: #9c3b2e;--seal-soft: rgba(156, 59, 46, .08);--seal-glow: rgba(156, 59, 46, .15);--line: #e4dccb;--line-soft: rgba(228, 220, 203, .5);--shadow: rgba(43, 37, 32, .06);--shadow-lg: rgba(43, 37, 32, .1);--blur: rgba(250, 246, 238, .72);--gap-xs: 4px;--gap-sm: 8px;--gap-md: 16px;--gap-lg: 24px;--gap-xl: 40px;--radius-sm: 6px;--radius: 12px;--radius-lg: 20px;--ease: cubic-bezier(.22, .61, .36, 1);--transition: .3s var(--ease);--font-serif: "Songti SC", "STSongti SC", "STSong", "Noto Serif SC", "SimSun", serif;--font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;--font-mono: "SF Mono", "Fira Code", Consolas, monospace}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-sans);background:var(--paper);color:var(--ink);line-height:1.8;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-image:radial-gradient(circle at 20% 50% rgba(156,59,46,.02) 0%,transparent 50%),radial-gradient(circle at 80% 20% rgba(108,142,137,.02) 0%,transparent 50%);min-height:100vh}.app{max-width:680px;margin:0 auto;padding:0 20px 80px}header.brand{text-align:center;padding:48px 0 36px;margin-bottom:var(--gap-lg)}header.brand h1{font-family:var(--font-serif);font-size:36px;font-weight:600;letter-spacing:8px;color:var(--ink);position:relative;display:inline-block}header.brand h1:after{content:"";position:absolute;bottom:-6px;left:50%;transform:translate(-50%);width:24px;height:2px;background:var(--seal);opacity:.4;border-radius:1px}header.brand p{font-size:13px;color:var(--ink-faint);margin-top:14px;letter-spacing:3px;font-weight:300}.brand-mark{font-size:36px;margin-bottom:12px;opacity:.3;animation:floatMark 4s ease-in-out infinite}@keyframes floatMark{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;margin-bottom:var(--gap-md);box-shadow:0 1px 3px var(--shadow);transition:box-shadow var(--transition)}.toast-card{background:var(--ink);color:var(--paper);border-radius:var(--radius);padding:14px 22px;margin-bottom:var(--gap-md);font-size:14px;text-align:center;letter-spacing:1px;animation:toastSlide .4s var(--ease);box-shadow:0 4px 16px var(--shadow-lg)}@keyframes toastSlide{0%{opacity:0;transform:translateY(-8px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}input,textarea{width:100%;font-family:var(--font-sans);font-size:15px;padding:12px 16px;margin:4px 0 14px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--paper-deep);color:var(--ink);transition:all var(--transition)}input:focus,textarea:focus{outline:none;border-color:var(--seal);background:var(--paper);box-shadow:0 0 0 3px var(--seal-soft)}input::placeholder,textarea::placeholder{color:var(--ink-faint);font-weight:300}textarea{min-height:160px;resize:vertical;font-family:var(--font-serif);line-height:2}button{font-family:var(--font-sans);font-size:14px;font-weight:500;padding:10px 24px;border:none;border-radius:var(--radius-sm);background:var(--ink);color:var(--paper);cursor:pointer;letter-spacing:2px;margin-right:var(--gap-sm);transition:all var(--transition);position:relative;overflow:hidden}button:hover{opacity:1;transform:translateY(-1px);box-shadow:0 4px 12px var(--shadow-lg)}button:active{transform:translateY(0)}button.ghost{background:transparent;color:var(--ink-soft);border:1px solid var(--line)}button.ghost:hover{border-color:var(--ink-soft);color:var(--ink);background:var(--paper-deep)}.tabs{display:flex;gap:var(--gap-xs);margin-bottom:var(--gap-md);flex-wrap:wrap;padding:4px;background:var(--paper-deep);border-radius:var(--radius);border:1px solid var(--line)}.tabs button{background:transparent;color:var(--ink-faint);border:none;padding:8px 16px;border-radius:var(--radius-sm);font-size:13px;letter-spacing:1px;box-shadow:none}.tabs button:hover{color:var(--ink-soft);transform:none;box-shadow:none;background:var(--paper)}.tabs button.active{background:var(--ink);color:var(--paper)}.letter-item{border-bottom:1px solid var(--line-soft);cursor:pointer;transition:all var(--transition);border-radius:var(--radius-sm);padding:16px 12px;margin:0 -12px}.letter-item:hover{background:var(--paper-deep)}.letter-item:last-child{border-bottom:none}.letter-item h3{font-family:var(--font-serif);font-size:17px;font-weight:500;margin-bottom:6px;color:var(--ink)}.letter-item .meta{font-size:12px;color:var(--ink-faint);font-weight:300}.badge{display:inline-block;font-size:11px;padding:2px 10px;border-radius:20px;background:var(--seal-soft);color:var(--seal);margin-left:8px;font-weight:500;letter-spacing:0}.badge.transit{background:#6c8e891a;color:#4a6b62}.letter-fresh{background:linear-gradient(135deg,var(--seal-soft) 0%,transparent 70%);border-left:3px solid var(--seal);animation:freshGlow 3s ease-in-out infinite alternate}@keyframes freshGlow{0%{box-shadow:0 0 0 0 var(--seal-glow)}to{box-shadow:0 0 24px 0 var(--seal-glow)}}.letter-unread .letter-icon{animation:envelopeBounce 2s ease-in-out infinite}@keyframes envelopeBounce{0%,to{transform:translateY(0) rotate(0)}50%{transform:translateY(-4px) rotate(8deg)}}.letter-row{display:flex;align-items:flex-start;gap:14px}.letter-icon{font-size:22px;opacity:.5;margin-top:1px;flex-shrink:0}.fresh-banner{display:flex;align-items:center;gap:12px;padding:14px 20px;margin-bottom:var(--gap-md);border:1px solid var(--seal);border-radius:var(--radius);background:var(--seal-soft);color:var(--seal);font-size:14px;font-weight:500;animation:bannerSlide .6s var(--ease)}@keyframes bannerSlide{0%{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:translateY(0)}}.fresh-seal{font-size:24px;animation:envelopeBounce 2s ease-in-out infinite}.fresh-badge{background:var(--seal)!important;color:var(--paper)!important;animation:badgePulse 2s ease-in-out infinite}@keyframes badgePulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.7;transform:scale(1.05)}}.letter-modal{animation:letterOpen .5s var(--ease)}@keyframes letterOpen{0%{opacity:0;transform:scale(.94) translateY(16px)}to{opacity:1;transform:scale(1) translateY(0)}}.death-disclaimer{margin:var(--gap-md) 0;padding:16px 20px;border:1px solid var(--seal);border-radius:var(--radius);background:var(--seal-soft)}.seasonal-banner{display:flex;align-items:center;flex-wrap:wrap;gap:14px;padding:12px 18px;margin-bottom:var(--gap-md);border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(135deg,rgba(108,142,137,.05) 0%,transparent 100%);font-size:12px}.seasonal-current{display:flex;align-items:center;gap:8px;color:var(--ink);font-weight:500}.seasonal-icon{font-size:16px}.seasonal-upcoming{display:flex;gap:16px;opacity:.6}.seasonal-event{white-space:nowrap}.quota-exhausted{display:flex;align-items:flex-start;gap:14px;padding:16px 20px;margin-bottom:var(--gap-md);border:1px solid var(--seal);border-radius:var(--radius);background:var(--seal-soft);font-size:13px}.quota-exhausted>span{font-size:28px;flex-shrink:0}.quota-exhausted p{margin-top:6px;opacity:.7;line-height:1.6}.invite-card{margin-top:var(--gap-lg);padding:18px 20px;border:1px dashed var(--seal);border-radius:var(--radius);background:var(--seal-soft)}.invite-code-row{display:flex;align-items:center;gap:14px}.invite-code{font-size:22px;font-weight:700;letter-spacing:6px;color:var(--seal);font-family:var(--font-mono);padding:8px 18px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--paper)}.friend{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid var(--line-soft);transition:padding var(--transition)}.friend:hover{padding-left:8px}.empty{text-align:center;opacity:.4;padding:40px 0;font-weight:300;font-size:14px}.poem{text-align:center;font-family:var(--font-serif);font-style:italic;opacity:.4;margin:32px 0;font-size:14px;letter-spacing:2px}.md-preview,.md-body{line-height:1.9;font-family:var(--font-serif);color:var(--ink)}.md-preview h1,.md-body h1,.md-preview h2,.md-body h2,.md-preview h3,.md-body h3,.md-preview h4,.md-body h4{margin:16px 0 10px;color:var(--ink);font-weight:600}.md-preview p,.md-body p{margin:10px 0}.md-preview ul,.md-body ul,.md-preview ol,.md-body ol{padding-left:24px;margin:10px 0}.md-preview blockquote,.md-body blockquote{border-left:3px solid var(--seal);padding-left:16px;margin:12px 0;opacity:.75;font-style:italic}.md-preview pre,.md-body pre{background:var(--paper-deep);padding:14px;border-radius:var(--radius-sm);overflow-x:auto;border:1px solid var(--line)}.md-preview code,.md-body code{font-family:var(--font-mono);background:var(--paper-deep);padding:3px 6px;border-radius:4px;font-size:13px}.md-preview pre code,.md-body pre code{background:transparent;padding:0}.md-preview a,.md-body a{color:var(--seal);text-decoration:none;border-bottom:1px solid transparent;transition:border-color var(--transition)}.md-preview a:hover,.md-body a:hover{border-bottom-color:var(--seal)}.app.stationery-default{--paper: #faf6ee;--paper-deep: #f0ead9;--ink: #2b2520;--seal: #9c3b2e;--line: #e4dccb}.app.stationery-rice-paper{--paper: #fbf8f0;--paper-deep: #f2ede0;--ink: #3d342a;--seal: #8b5a2b;--line: #e5dac8}.app.stationery-blue-ink{--paper: #f0f5f8;--paper-deep: #e4ecf2;--ink: #1a2e3b;--seal: #1e5f74;--line: #c5d6df}.app.stationery-autumn-leaf{--paper: #fdf5ea;--paper-deep: #f7ead4;--ink: #5a3a22;--seal: #c25e00;--line: #e8d4b8}.app.stationery-night-scroll{--paper: #1c1a18;--paper-deep: #252320;--ink: #e8e0d0;--ink-soft: #b8aa94;--ink-faint: #786e60;--seal: #c9a86c;--line: #3a3530;--shadow: rgba(0, 0, 0, .3);--shadow-lg: rgba(0, 0, 0, .4)}.app.stationery-night-scroll body{background:#1c1a18}.app.stationery-night-scroll .card,.app.stationery-night-scroll input,.app.stationery-night-scroll textarea{background:#252320;color:var(--ink)}.app.stationery-night-scroll .tabs{background:#1c1a18;border-color:var(--line)}@media (max-width: 640px){header.brand{padding:32px 0 24px}header.brand h1{font-size:28px;letter-spacing:6px}.card{padding:20px 18px}.tabs button{padding:7px 12px;font-size:12px}textarea{min-height:120px}}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--paper-deep)}::-webkit-scrollbar-thumb{background:var(--ink-faint);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--ink-soft)}::selection{background:var(--seal-soft);color:var(--seal)}.hero-section{padding:60px 0 40px}.hero-mark{font-size:52px;opacity:.25;margin-bottom:20px}.hero-title{font-size:42px!important;letter-spacing:10px!important}.hero-subtitle{font-size:15px!important;letter-spacing:4px!important;margin-top:18px!important;font-family:var(--font-serif)!important}.hero-card{text-align:center;padding:36px 28px}.hero-desc{font-size:15px;line-height:2;opacity:.8;margin-bottom:20px;color:var(--ink)}.hero-quote{font-family:var(--font-serif);font-style:italic;font-size:14px;opacity:.55;margin-bottom:24px;line-height:1.9}.hero-cta{font-size:15px!important;padding:12px 36px!important;border-radius:var(--radius)!important;letter-spacing:3px!important;font-weight:600!important}.hero-stats{display:flex;justify-content:center;align-items:center;gap:0;margin-top:28px;padding-top:24px;border-top:1px solid var(--line)}.stat-item{display:flex;flex-direction:column;align-items:center;padding:0 20px}.stat-num{font-family:var(--font-serif);font-size:24px;font-weight:600;color:var(--ink)}.stat-label{font-size:11px;color:var(--ink-faint);margin-top:4px;letter-spacing:1px}.stat-divider{width:1px;height:32px;background:var(--line)}.section-title{font-family:var(--font-serif);font-size:20px;font-weight:600;color:var(--ink);margin-bottom:8px}.section-desc{font-size:13px;color:var(--ink-faint);margin-bottom:20px;font-weight:300}.pagination{display:flex;justify-content:center;gap:12px;margin-top:20px}.footer-cta{text-align:center;margin-top:32px;opacity:.35;font-size:13px;padding:20px 0;font-family:var(--font-serif);letter-spacing:2px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#2b252066;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:200;padding:20px}.modal-content{max-width:600px;width:100%;max-height:80vh;overflow-y:auto;margin:0}.modal-title{font-family:var(--font-serif)!important;font-size:22px!important;font-weight:600;color:var(--ink)!important;margin-bottom:10px}.modal-meta{margin-bottom:20px!important}.modal-footer{margin-top:24px;text-align:right}.hash-info{font-size:11px;opacity:.35;margin-top:14px;word-break:break-all;font-family:var(--font-mono)}@media (max-width: 640px){.hero-title{font-size:32px!important;letter-spacing:8px!important}.hero-section{padding:40px 0 28px}.hero-card{padding:24px 18px}.stat-item{padding:0 12px}.stat-num{font-size:20px}.hero-stats{gap:0}}.public-wall-page{display:flex;width:100vw;height:100vh;overflow:hidden;background:var(--paper);font-family:var(--font-sans)}.wall-scroll-container{flex:1;height:100vh;overflow-y:auto;scroll-behavior:smooth;padding:0 6vw}.wall-scroll-container::-webkit-scrollbar{width:4px}.wall-scroll-container::-webkit-scrollbar-track{background:transparent}.wall-scroll-container::-webkit-scrollbar-thumb{background:var(--line);border-radius:2px}.wall-hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;position:relative;padding:40px 20px}.hero-bg-mark{position:absolute;font-size:320px;opacity:.04;top:50%;left:50%;transform:translate(-50%,-50%);pointer-events:none;-webkit-user-select:none;user-select:none}.wall-brand{font-family:var(--font-serif);font-size:56px;font-weight:700;letter-spacing:14px;color:var(--ink);margin-bottom:16px;position:relative;z-index:1}.wall-tagline{font-family:var(--font-serif);font-size:16px;color:var(--seal);letter-spacing:6px;margin-bottom:32px;opacity:.8}.wall-desc{font-size:15px;line-height:2;color:var(--ink-soft);max-width:460px;margin-bottom:36px}.wall-enter-btn{font-family:var(--font-sans);font-size:15px;font-weight:600;padding:14px 40px;border:none;border-radius:30px;background:var(--ink);color:var(--paper);cursor:pointer;letter-spacing:4px;transition:all .4s var(--ease);box-shadow:0 4px 20px var(--shadow-lg);position:relative;z-index:1}.wall-enter-btn:hover{background:var(--seal);transform:translateY(-2px);box-shadow:0 8px 28px var(--seal-glow)}.wall-hero-stats{display:flex;align-items:center;margin-top:48px;position:relative;z-index:1}.hero-stat{display:flex;flex-direction:column;align-items:center;padding:0 24px}.hero-stat-num{font-family:var(--font-serif);font-size:28px;font-weight:600;color:var(--ink)}.hero-stat-label{font-size:11px;color:var(--ink-faint);margin-top:6px;letter-spacing:1px}.hero-stat-sep{width:1px;height:36px;background:var(--line)}.scroll-hint{position:absolute;bottom:32px;left:50%;transform:translate(-50%);font-size:11px;color:var(--ink-faint);letter-spacing:2px;animation:scrollHintBounce 2s ease-in-out infinite}@keyframes scrollHintBounce{0%,to{transform:translate(-50%) translateY(0);opacity:.5}50%{transform:translate(-50%) translateY(6px);opacity:1}}.wall-card-section{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:40px 20px}.wall-card{max-width:520px;width:100%;background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:48px 44px;box-shadow:0 8px 40px var(--shadow-lg);cursor:pointer;transition:all .5s var(--ease);position:relative;overflow:hidden}.wall-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,transparent,var(--seal),transparent);opacity:.3}.wall-card:hover{transform:translateY(-6px) scale(1.01);box-shadow:0 16px 60px var(--shadow-lg),0 0 0 1px var(--seal-glow)}.wall-card-seal{position:absolute;top:24px;right:28px;width:44px;height:44px;border:2px solid var(--seal);border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:var(--font-serif);font-size:16px;font-weight:700;color:var(--seal);opacity:.3;transform:rotate(-12deg)}.wall-card-meta-top{font-size:11px;color:var(--ink-faint);letter-spacing:2px;text-transform:uppercase;margin-bottom:16px}.wall-card-title{font-family:var(--font-serif);font-size:26px;font-weight:600;line-height:1.5;color:var(--ink);margin-bottom:12px}.wall-card-author{font-size:13px;color:var(--ink-soft);margin-bottom:24px}.wall-card-divider{height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent);margin-bottom:20px}.wall-card-cta{font-size:13px;color:var(--seal);letter-spacing:2px;font-weight:500}.wall-empty{text-align:center;padding:40px;color:var(--ink-faint)}.wall-empty-section{min-height:80vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px}.wall-empty-icon{font-size:64px;opacity:.15;margin-bottom:20px}.wall-empty-section p{font-size:15px;color:var(--ink-soft);max-width:360px;line-height:2}.wall-footer{min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:60px 20px}.wall-footer-quote{font-family:var(--font-serif);font-style:italic;font-size:15px;color:var(--ink-soft);max-width:420px;line-height:2;margin-bottom:32px;opacity:.7}.wall-footer-copy{margin-top:24px;font-size:12px;color:var(--ink-faint);letter-spacing:2px}.wall-side-panel{width:0;overflow:hidden;transition:width .5s var(--ease);background:var(--paper-deep);border-left:1px solid var(--line);display:flex;align-items:center;justify-content:center}.side-panel-inner{padding:40px;max-width:340px;text-align:center;opacity:0;transition:opacity .4s ease .2s}.wall-side-panel:hover .side-panel-inner,.wall-side-panel.always-show .side-panel-inner{opacity:1}.side-brand-mark{font-size:40px;opacity:.2;margin-bottom:16px}.side-brand{font-family:var(--font-serif);font-size:22px;font-weight:600;color:var(--ink);margin-bottom:16px;letter-spacing:4px}.side-quote{font-size:13px;color:var(--ink-soft);line-height:1.9;margin-bottom:32px;font-family:var(--font-serif)}.side-features{text-align:left;margin-bottom:32px}.side-feature{display:flex;gap:14px;margin-bottom:20px;align-items:flex-start}.side-feature-dot{width:28px;height:28px;border-radius:50%;background:var(--seal-soft);color:var(--seal);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;flex-shrink:0}.side-feature strong{font-size:14px;color:var(--ink);display:block;margin-bottom:4px}.side-feature p{font-size:12px;color:var(--ink-faint);line-height:1.6}.side-enter-btn{font-size:14px;padding:12px 36px;border-radius:24px;background:var(--seal);color:var(--paper);border:none;cursor:pointer;letter-spacing:3px;font-weight:600;transition:all .3s var(--ease)}.side-enter-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px var(--seal-glow)}@media (min-width: 1024px){.wall-side-panel{width:340px}.side-panel-inner{opacity:1}}@media (max-width: 640px){.wall-brand{font-size:40px;letter-spacing:10px}.wall-tagline,.wall-desc{font-size:14px}.wall-card{padding:32px 24px}.wall-card-title{font-size:20px}.hero-bg-mark{font-size:200px}.hero-stat{padding:0 14px}.hero-stat-num{font-size:22px}}