:root{--bg:#eef2f7;--ink:#111827;--muted:#6b7280;--line:#d8e1ee;--paper:#ffffff;--paper-strong:#f5f8fc;--accent:#3f8cff;--accent-strong:#242833;--accent-soft:#eaf4ff;--accent-banner:#cfe6ff;--gold:#f4d99f;--accent-2:#3b6aa1;--danger:#8a2118;--shadow:rgba(31,45,68,0.12)}*{box-sizing:border-box}body,html{margin:0;min-height:100%;background:var(--bg);color:var(--ink)}body{font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif}button,input{font:inherit}a{color:inherit}.app-shell{min-height:100vh;padding:24px;background:radial-gradient(circle at 16% 10%,rgba(63,140,255,.1),transparent 30%),linear-gradient(180deg,#f3f6fb 0,var(--bg) 100%)}.wrap{width:min(1240px,100%);margin:0 auto}.tool-page{display:flex;align-items:flex-start;justify-content:center;min-height:calc(100vh - 48px);padding:clamp(28px,5vh,56px) 0}.brand{display:flex;align-items:center;gap:14px;letter-spacing:0;margin-bottom:30px}.brand strong{display:block;font-size:30px;line-height:1.2}.brand>div>span{color:#8b95a5;display:block;font-size:15px;line-height:1.6;margin-top:4px}.brand-mark{width:58px;height:58px;display:block;position:relative;background:#9dccf4;color:#fff;border:0;border-radius:999px;box-shadow:0 12px 30px rgba(63,140,255,.22)}.brand-mark svg{display:block;height:24px;left:50%;position:absolute;top:50%;transform:translate(-50%,-50%);width:24px;color:#fff;stroke:#fff}.success-panel,.upload-panel{background:var(--paper);border:1px solid var(--line);border-radius:18px;box-shadow:0 18px 52px rgba(31,45,68,.1)}.upload-panel{width:100%;min-height:clamp(640px,calc(100vh - 120px),820px);padding:clamp(34px,5vw,56px);display:flex;flex-direction:column}.success-panel h1{margin:0 0 8px;font-size:26px;letter-spacing:0}.hint{color:var(--muted);line-height:1.7;margin:0 0 24px}.toast{width:min(980px,calc(100% - 32px));min-height:44px;border:1px solid transparent;color:#172033;border-radius:14px;box-shadow:0 16px 40px rgba(31,45,68,.16);display:flex;align-items:center;gap:10px;left:50%;padding:12px 16px;position:fixed;top:18px;transform:translateX(-50%);font-weight:700;z-index:20}.toast svg{flex:0 0 auto}.toast.success{border-color:#b8dcff;background:#edf7ff}.toast.success svg{color:#3f8cff}.toast.error{border-color:#f0b8ad;background:#fff6f3}.toast.error,.toast.error svg{color:var(--danger)}.form{display:grid;flex:1 1;grid-gap:24px;gap:24px;grid-template-rows:auto minmax(300px,1fr) auto}.field{display:grid;grid-gap:8px;gap:8px}.field label{font-weight:700}.field input[type=text]{width:100%;border:1px solid var(--line);background:#fbfdff;border-radius:10px;padding:14px 15px;color:var(--ink);outline:none}.field input[type=text]:focus{border-color:var(--accent);box-shadow:0 0 0 4px rgba(63,140,255,.14)}.dropzone{border:1px dashed #9db7d6;background:linear-gradient(180deg,#fbfdff,#f3f9ff);border-radius:14px;min-height:300px;padding:34px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;text-align:center;cursor:pointer;position:relative}.dropzone strong{font-size:16px}.dropzone:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px rgba(63,140,255,.14)}.dropzone.has-files{border-style:solid;background:#f7fbff}.dropzone.is-dragging{border-color:var(--accent);background:#edf7ff}.file-input{height:1px;opacity:0;overflow:hidden;position:absolute;width:1px}.small{color:var(--muted);font-size:13px}.file-list{width:min(620px,100%);max-width:100%;min-width:0;max-height:138px;overflow:auto;display:grid;grid-gap:8px;gap:8px;margin-top:2px}.file-more,.file-row{min-height:34px;border:1px solid #d9e9fb;border-radius:10px;background:#fff;color:#334155;grid-template-columns:minmax(0,1fr) auto;grid-gap:14px;gap:14px;padding:8px 10px;font-size:13px}.file-more,.file-name,.file-row{display:grid;align-items:center;min-width:0}.file-name{grid-template-columns:auto minmax(0,1fr);grid-gap:6px;gap:6px}.file-title{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-name svg{flex:0 0 auto;color:#3f8cff}.file-size{color:#334155;flex:0 0 auto;white-space:nowrap}.file-more{justify-content:center;grid-template-columns:1fr}.primary-button,.secondary-button{min-height:52px;border:1px solid var(--ink);border-radius:12px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;text-decoration:none;cursor:pointer}.primary-button{background:#9dccf4;border-color:#9dccf4;color:var(--ink);font-weight:800}.primary-button:hover{background:var(--accent);border-color:var(--accent);color:#fff}.primary-button:disabled{cursor:progress;opacity:.72}.secondary-button{background:transparent;color:var(--ink)}.spin{animation:spin .85s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.error{border:1px solid #d24b37;background:#fff2ee;color:var(--danger);border-radius:12px;padding:12px 14px;line-height:1.6}.success-panel{width:min(680px,calc(100% - 32px));margin:56px auto;padding:42px}.success-icon{width:52px;height:52px;display:grid;place-items:center;background:var(--accent-2);color:#fff;border-radius:12px;margin-bottom:18px}@media (max-width:820px){.app-shell{padding:18px}.success-panel,.upload-panel{padding:24px}.tool-page{min-height:calc(100vh - 36px);padding-top:14vh}.upload-panel{min-height:auto}.form{grid-template-rows:auto auto auto}.dropzone{min-height:220px;padding:28px 18px}.brand{align-items:flex-start}}