:root{--bg:#f5f0e8;--bg-alt:#eee8dd;--surface:#fff;--ink:#2c2c2c;--ink-muted:#888;--ink-subtle:#aaa;--border:#e0dbd3;--border-light:#ebe6de;--accent:#c9a06c;--accent-warm:#d4a574;--panel:#fffbfeeb;--panel-strong:#fff;--panel-border:#fadbeb;--pink:#ff8fb0;--pink-deep:#e86b92;--lavender:#d9c2f5;--gold:#ffd98a;--mint:#a8dfc0;--shadow-soft:0 10px 30px #f08eb429;--shadow-tight:0 4px 14px #f08eb433;--radius-lg:22px;--radius-md:15px;--radius-sm:11px;--font-body:"Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;--font-hand:"Noto Sans SC", "PingFang SC", sans-serif;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*,:before,:after{box-sizing:border-box}body{font:14px/1.55 var(--font-body);color:var(--ink);-webkit-font-smoothing:antialiased;background:var(--bg);min-height:100vh;margin:0}#landing{flex-direction:column;min-height:100vh;display:flex}.landing-header{background:var(--bg);z-index:10;justify-content:space-between;align-items:center;height:70px;padding:0 80px;display:flex;position:relative}.landing-header__left{align-items:center;gap:14px;display:flex}.landing-logo svg{display:block}.landing-brand{flex-direction:column;line-height:1.2;display:flex}.landing-brand__cn{color:var(--ink);letter-spacing:1px;font-size:18px;font-weight:700}.landing-brand__en{color:var(--ink-muted);letter-spacing:2px;text-transform:uppercase;font-size:10px;font-weight:400}.landing-nav{align-items:center;gap:40px;display:flex}.landing-nav__item{color:var(--ink-muted);padding:4px 0;font-size:15px;text-decoration:none;transition:color .2s;position:relative}.landing-nav__item:hover,.landing-nav__item--active{color:var(--ink)}.nav-dot{background:var(--ink);border-radius:50%;width:5px;height:5px;display:none;position:absolute;bottom:-2px;left:50%;transform:translate(-50%)}.landing-nav__item--active .nav-dot{display:block}.landing-header__right{align-items:center;gap:16px;display:flex}.landing-upload-btn{background:var(--ink);color:#fff;font-size:14px;font-weight:500;font-family:var(--font-body);cursor:pointer;border:none;border-radius:24px;align-items:center;gap:8px;padding:10px 24px;transition:background .2s,transform .15s;display:inline-flex}.landing-upload-btn:hover{background:#1a1a1a;transform:translateY(-1px)}.landing-upload-btn svg{flex-shrink:0}.hero{flex:1;align-items:center;gap:40px;width:100%;max-width:1440px;margin:0 auto;padding:0 80px;display:flex}.hero__left{flex:0 0 42%;max-width:560px}.hero__headline{color:var(--ink);letter-spacing:-.5px;margin:0 0 24px;font-size:clamp(36px,4.5vw,56px);font-weight:700;line-height:1.2}.hero__subtitle{color:var(--ink-muted);margin:0 0 40px;font-size:15px;line-height:1.8}.hero__cta{align-items:center;gap:16px;margin-bottom:60px;display:flex}.cta-primary{background:var(--ink);color:#fff;font-size:15px;font-weight:500;font-family:var(--font-body);cursor:pointer;border:none;border-radius:12px;align-items:center;gap:8px;padding:14px 32px;transition:background .2s,transform .15s,box-shadow .2s;display:inline-flex}.cta-primary:hover{background:#1a1a1a;transform:translateY(-2px);box-shadow:0 6px 20px #00000026}.hero__features{gap:32px;display:flex}.feature-item{flex-direction:column;align-items:flex-start;gap:6px;display:flex}.feature-icon{border:1.5px solid var(--border);width:52px;height:52px;color:var(--ink);border-radius:14px;justify-content:center;align-items:center;margin-bottom:4px;display:flex}.feature-label{color:var(--ink);font-size:14px;font-weight:500}.feature-desc{color:var(--ink-subtle);font-size:12px}.hero__right{flex-direction:column;flex:1;align-items:center;min-height:500px;display:flex;position:relative}.hero__color-dots{z-index:2;gap:12px;display:flex;position:absolute;top:0;right:40px}.color-dot{border-radius:50%;width:26px;height:26px;display:block;box-shadow:0 2px 6px #0000001a}.hero__carousel{flex:1;justify-content:center;align-items:center;width:100%;display:flex}.carousel-slide{justify-content:center;width:100%;display:none}.carousel-slide--active{display:flex}.carousel-placeholder{aspect-ratio:1;background:0 0;border-radius:20px;justify-content:center;align-items:center;width:100%;max-width:520px;display:flex;overflow:hidden}.carousel-placeholder__img{object-fit:contain;filter:drop-shadow(0 8px 24px #0000001f);width:85%;height:85%}#app{z-index:1;grid-template-rows:auto 1fr;grid-template-columns:308px minmax(0,1fr) 312px;gap:14px;max-width:1500px;height:100vh;margin:0 auto;padding:16px 18px 24px;display:grid;position:relative}.topbar{grid-column:1/-1;justify-content:space-between;align-items:center;gap:16px;padding:8px 6px 4px;display:flex}.brand{align-items:center;gap:10px;display:flex}.brand-text{flex-direction:column;display:flex}.brand-name{font:700 15px/1.2 var(--font-body);color:var(--ink);margin:0}.brand-name span{color:var(--ink-subtle);letter-spacing:1px;margin-left:6px;font-size:10px;font-weight:400}.back-to-home{border:1.5px solid var(--border);color:var(--ink-muted);font-size:13px;font-family:var(--font-body);cursor:pointer;background:0 0;border-radius:8px;align-items:center;gap:6px;padding:6px 14px;transition:border-color .2s,background .2s,color 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var(--font-body);color:var(--ink);cursor:pointer;border-radius:6px;padding:5px 12px;transition:border-color .15s}.btn-replace:hover{border-color:var(--accent);color:var(--accent-warm)}.btn-erase:hover{color:#b8860b;border-color:#b8860b}.hint-faint{color:var(--ink-subtle);font-size:11px}.sub-banner{color:#8a6d00;background:#fff8e6;border:1px solid #f0d88a;border-radius:8px;align-items:flex-start;gap:8px;margin:8px 0;padding:8px 12px;font-size:12px;display:flex}.sub-banner>svg{flex-shrink:0;margin-top:1px}.sub-section{margin-top:6px}.sub-title{color:var(--ink);margin-bottom:4px;font-size:11px;font-weight:600}.sub-cand{align-items:center;gap:6px;padding:4px 0;font-size:11px;display:flex}.sub-cand .dot{width:14px;height:14px}.sub-name{color:var(--ink-muted)}.sub-delta{color:var(--ink-subtle);font-size:10px}.btn-sub-apply{border:1px solid var(--border);background:var(--surface);font:10px/1.3 var(--font-body);color:var(--ink);cursor:pointer;border-radius:4px;padding:3px 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.15s}.activate-input:focus{border-color:var(--accent);outline:none}.activate-msg{min-height:18px;margin-bottom:8px;font-size:12px}.activate-msg.success{color:#2a8a4a}.activate-msg.error{color:#d44}.activate-submit{background:var(--ink);color:#fff;width:100%;font:500 14px/1.4 var(--font-body);cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:6px;padding:10px;transition:background .2s;display:flex}.activate-submit:hover{background:#1a1a1a}@media (width<=1160px){#app{grid-template-rows:auto auto 55vh auto;grid-template-columns:1fr;height:auto;min-height:100vh}.topbar{grid-column:1}.stage{grid-area:2/1;min-height:55vh}.left-panel{grid-area:3/1}.right-panel{grid-area:4/1}.hero{text-align:center;flex-direction:column;padding:0 24px}.hero__left{flex:none;max-width:100%}.hero__cta,.hero__features{justify-content:center}.hero__right{min-height:300px}.landing-header{padding:0 24px}.landing-nav{display:none}}@media (width<=520px){.hero__headline{font-size:28px}.hero__features{flex-wrap:wrap;gap:16px}.feature-icon{width:42px;height:42px}.landing-header{height:56px;padding:0 16px}.landing-brand__cn{font-size:15px}.landing-brand__en{font-size:9px}.hero{padding:0 16px}.hero__color-dots{right:16px}}@media (prefers-reduced-motion:reduce){.hint-heart span,.reference-decor{transition-duration:.01ms!important;animation:none!important;transform:none!important}}