:root{--ink: #17243d;--muted: #5f6b82;--faint: #606e84;--line: #e5e9f1;--line-strong: #cbd4e3;--paper: #fff;--chrome: #f5f7fb;--accent: #315efb;--accent-soft: #eef2ff;--radius: 16px;--gutter: clamp(20px, 4.5vw, 72px);color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:106px}body,#root{min-height:100vh;margin:0}body{font-family:-apple-system,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-size:18px;color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit}button{color:inherit;cursor:pointer}a{color:inherit;text-decoration:none}button,a{-webkit-tap-highlight-color:transparent}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:5px}::selection{color:var(--ink);background:#dbe4ff}.skip-link{position:fixed;top:10px;left:16px;z-index:30;padding:12px 18px;border:none;border-radius:8px;background:var(--ink);color:#fff;transform:translateY(-160%)}.skip-link:focus{transform:translateY(0)}.gallery{min-height:100vh}.gallery-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:32px;min-height:86px;padding:16px max(var(--gutter),calc((100vw - 1296px)/2));border-bottom:1px solid rgb(229 233 241 / 75%);background:#fffffff0;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0}.brand strong{font-size:25px;letter-spacing:-1px;font-weight:750}.brand-period{color:var(--accent)}.brand-symbol{position:relative;display:block;width:29px;height:29px;border:2px solid var(--accent);border-radius:7px;transform:rotate(-8deg)}.brand-symbol:before{content:"";position:absolute;width:12px;height:12px;top:6px;left:6px;border:2px solid var(--accent);border-radius:3px}.brand-symbol:after{content:"";position:absolute;width:6px;height:6px;right:-4px;bottom:-4px;background:var(--accent);border:2px solid white;border-radius:2px}.header-nav{display:flex;align-items:center;gap:32px;margin-left:auto}.header-nav button{display:inline-flex;align-items:center;gap:6px;padding:0;border:none;background:transparent;color:var(--muted);font-size:16px;transition:color .2s}.header-nav button:hover{color:var(--accent)}.header-nav button span{padding:2px 5px;border-radius:4px;color:var(--accent);background:var(--accent-soft);font-size:14px;font-weight:650}.header-cta{display:inline-flex;align-items:center;gap:20px;min-height:42px;padding:10px 17px;border:1px solid var(--line);border-radius:9px;background:#fff;font-size:16px;font-weight:600;transition:border-color .2s,background .2s}.header-cta:hover{border-color:var(--accent);background:var(--accent-soft)}.gallery-body{max-width:1440px;margin:0 auto;padding:0 var(--gutter)}.hero{display:grid;grid-template-columns:.92fr 1.12fr;align-items:center;gap:4%;padding:74px 0 70px}.hero-copy{animation:enter .65s both}.hero-eyebrow{display:inline-flex;align-items:center;gap:9px;margin:0 0 23px;padding:7px 11px;border:1px solid #dfe6ff;border-radius:6px;color:#3758b6;background:#f7f9ff;font-size:16px;font-weight:550}.status-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent)}.hero h1{margin:0;font-size:clamp(44px,5.2vw,76px);font-weight:750;line-height:1.24;letter-spacing:-.045em}.hero-word{position:relative;display:inline-block;margin-left:4px;color:var(--accent)}.hero-word:after{content:"";position:absolute;top:7%;right:-5%;bottom:1%;left:-5%;border:1px solid #b9c9ff;border-radius:3px;z-index:-1;background:#f3f6ff}.word-corner{position:absolute;top:6%;right:-8%;width:7px;height:7px;border:1px solid var(--accent);border-radius:1px;background:#fff}.hero-description{margin:23px 0 28px;color:var(--muted);font-size:18px;line-height:1.95}.hero-actions{display:flex;align-items:center;gap:26px;flex-wrap:wrap}.button-dark{display:inline-flex;align-items:center;justify-content:center;gap:30px;min-height:50px;padding:14px 22px;border:1px solid var(--accent);border-radius:10px;color:#fff;background:var(--accent);font-size:17px;font-weight:600;box-shadow:0 5px 14px #315efb21;transition:background .2s,transform .2s,box-shadow .2s}.button-dark:hover{background:#254ddb;transform:translateY(-2px);box-shadow:0 8px 20px #315efb38}.button-dark span,.button-text span,.header-cta span{transition:transform .2s}.button-dark:hover span,.header-cta:hover span{transform:translate(2px,-2px)}.button-text{display:inline-flex;align-items:center;gap:12px;min-height:44px;padding:0;border:none;background:transparent;font-size:16px;font-weight:550}.button-text:hover{color:var(--accent)}.button-text:hover span{transform:translateY(3px)}.hero-footnote{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:24px 0 0;color:var(--muted);font-size:14px;line-height:1.8}.hero-footnote span{display:inline-flex;align-items:center;gap:7px;white-space:nowrap}.hero-footnote span:before{content:"✓";color:var(--accent)}.hero-art{position:relative;min-width:0;padding:110px 13px 96px;animation:enter .8s .12s both}.art-grid{position:absolute;top:8px;right:-24px;bottom:0;left:-24px;border-radius:42px;background-image:radial-gradient(#cbd6f0 .7px,transparent .7px),radial-gradient(ellipse at center,#edf2ff,#fafbff 60%,transparent 73%);background-size:18px 18px,100% 100%;z-index:-1;-webkit-mask-image:linear-gradient(transparent,black 12%,black 85%,transparent);mask-image:linear-gradient(transparent,black 12%,black 85%,transparent)}.art-input{position:absolute;top:8px;left:-8px;z-index:2;display:flex;align-items:center;gap:13px;width:92%;padding:15px 18px;border:1px solid #e0e7f8;border-radius:12px;background:#fff;box-shadow:0 7px 24px #2840780f}.input-spark{display:grid;place-items:center;flex-shrink:0;width:32px;height:32px;border-radius:8px;color:var(--accent);background:var(--accent-soft);font-size:24px}.art-input div{display:grid;gap:6px;min-width:0}.art-input div>span{color:var(--muted);font-size:14px}.art-input strong{font-size:16px;font-weight:500;line-height:1.6}.input-check{margin-left:auto;color:#16865f;font-size:18px}.hero-paper{display:block;width:100%;padding:0;border:1px solid #dbe3f2;border-radius:14px;overflow:hidden;background:#fff;text-align:left;box-shadow:0 22px 50px #2c40731c,0 3px 9px #2c40730a;transform:rotate(-2deg);transition:transform .4s,border-color .25s}.hero-paper:hover{transform:rotate(0) translateY(-3px);border-color:#b3c4fb}.paper-heading{display:flex;align-items:center;gap:12px;min-height:43px;padding:11px 16px;border-bottom:1px solid var(--line);background:#fcfdff;color:var(--muted);font-size:14px}.window-dots{display:flex;gap:4px}.window-dots i{display:block;width:5px;height:5px;background:#d7deea;border-radius:50%}.preview-status{margin-left:auto;color:#16865f;font-size:13px}.preview-status:before{content:"✓ "}.hero-preview{height:350px;padding:16px}.hero-diagram,.hero-diagram svg{display:block;width:100%;height:100%}.hero-preview-placeholder{display:grid;place-items:center;height:100%;color:var(--faint);font-size:16px}.paper-caption{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-top:1px solid var(--line)}.paper-caption div{display:grid;gap:6px}.paper-caption strong{font-size:16px;font-weight:600}.paper-caption div span{font-size:14px;color:var(--muted)}.paper-arrow{display:grid;place-items:center;width:28px;height:28px;border:1px solid var(--line);border-radius:7px;color:var(--accent)}.art-export{position:absolute;bottom:11px;right:-20px;z-index:2;display:flex;align-items:center;gap:13px;min-width:296px;padding:16px;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:0 8px 30px #28407817}.export-icon{display:grid;place-items:center;width:33px;height:33px;border-radius:8px;background:var(--accent-soft);color:var(--accent);font-size:22px}.art-export div{display:grid;gap:6px}.art-export strong{font-size:14px;font-weight:600}.art-export div span{color:var(--muted);font-size:14px}.export-format{margin-left:auto;padding:5px 6px;border:1px solid var(--line);border-radius:4px;font-size:13px;font-weight:700}.use-cases{display:flex;align-items:center;justify-content:center;gap:32px;flex-wrap:wrap;padding:26px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.use-cases>span:first-child{margin-right:auto;color:var(--muted);font-size:16px}.use-cases 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svg{display:block;width:100%;height:100%;transition:transform .35s;animation:ink-in .35s both}.card:hover .card-cover svg{transform:scale(1.025)}.card-skeleton{width:100%;height:100%;border-radius:6px;background:linear-gradient(100deg,#f4f6fa 25%,#fcfdff,#f4f6fa 75%);background-size:200% 100%;animation:card-shimmer 1.5s linear infinite}.card-skeleton.broken{display:grid;place-items:center;color:var(--muted);animation:none;background:var(--chrome)}.card-meta{display:grid;grid-template-rows:auto 1fr auto;gap:11px;min-height:0;padding:18px}.card-title{display:flex;align-items:center;justify-content:space-between;gap:8px}.card-title strong{font-size:18px;font-weight:600}.card-open{display:grid;place-items:center;width:23px;height:23px;border-radius:6px;color:var(--muted);transition:background .2s,color .2s}.card:hover .card-open{color:var(--accent);background:var(--accent-soft)}.card-meta 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p{margin:0;color:var(--muted);font-size:14px}.gallery-footer>span{margin-left:auto;color:var(--faint);font-size:13px;letter-spacing:.05em}.workspace-loading{display:grid;place-items:center;min-height:100dvh;color:var(--muted);background:var(--chrome);font-size:17px}.app{display:grid;grid-template-rows:auto minmax(0,1fr) auto;height:100dvh;min-height:500px;background:var(--chrome)}.topbar{display:flex;align-items:center;gap:18px;min-height:78px;padding:15px 24px;border-bottom:1px solid var(--line);background:#fff}.editor-brand strong{font-size:22px}.editor-brand .brand-symbol{width:25px;height:25px;border-radius:6px}.editor-brand .brand-symbol:before{width:10px;height:10px;top:5px;left:5px}button.back{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:38px;padding:8px 11px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--muted);font-size:16px;transition:background .2s,color 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button:first-child:hover:not(:disabled){background:#254ddb}.workspace{display:grid;grid-template-columns:clamp(320px,28vw,400px) minmax(0,1fr);min-height:0}.editor-pane{display:grid;grid-template-rows:auto minmax(240px,1fr);min-height:0;overflow-y:auto;border-right:1px solid var(--line);background:#fff}.prompt-section{display:grid;gap:16px;padding:24px;border-bottom:1px solid var(--line)}.pane-title{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--ink);font-size:16px;font-weight:600}.pane-title>span{display:inline-flex;align-items:center;gap:10px}.pane-number{display:inline-grid;place-items:center;width:23px;height:23px;border-radius:6px;color:var(--accent);background:var(--accent-soft);font-size:13px;font-weight:600}.pane-subtitle{margin:-5px 0 0;color:var(--muted);font-size:16px;line-height:1.8}.kind-select{width:100%;min-width:0;min-height:40px;padding:8px 12px;border:1px solid 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