/* Normula 网页工作台 · 视觉方向：立体纸张海报（sculpt）
   大字、几何色块与立体纸张。黄色 #f4d44c 色块 + 蓝色 #2949c7 主色 + 2px 墨线。 */
:root{
  --bg:#fff;--surface:#fff;--ink:#232323;--muted:#757575;
  --accent:#2949c7;--soft:#f1f2f4;--line:#dedfe1;
  --yellow:#f4d44c;--yellow-ink:#63562d;
  --radius:6px;
  --display:"Microsoft YaHei","PingFang SC",sans-serif;
  font-family:var(--display);font-size:15px;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink)}
button,input,select,textarea{font:inherit;color:inherit}
button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
button:disabled{cursor:not-allowed;opacity:.5}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,.upload-area:focus-visible{outline:3px solid #cd9f25;outline-offset:4px}
p{line-height:1.85}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{font-weight:600}
h1{letter-spacing:-.055em}
h2{letter-spacing:-.03em}
small{line-height:1.7}
[hidden]{display:none!important}
.icon{width:20px;height:20px;flex-shrink:0;vertical-align:middle}
.flipped{transform:rotate(180deg)}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;overflow:hidden;clip-path:inset(50%);white-space:nowrap;padding:0!important;border:0!important}
.skip-link{position:fixed;top:-60px;left:20px;background:var(--accent);color:#fff;padding:12px 20px;z-index:100}
.skip-link:focus{top:10px}

/* 按钮 */
.primary,.secondary,.icon-button,.text-button{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:1px solid transparent;transition:background .18s,transform .18s}
.primary,.secondary{padding:13px 22px;border-radius:var(--radius);font-weight:600;min-height:46px}
.primary{background:var(--accent);color:#fff}
.primary:hover:not(:disabled){filter:brightness(1.07);transform:translateY(-1px)}
.secondary{background:transparent;border-color:var(--line);color:var(--ink)}
.secondary:hover:not(:disabled){background:var(--soft)}
.full{width:100%}
.icon-button{width:36px;height:36px;background:transparent;color:var(--muted);border-radius:var(--radius)}
.icon-button:hover:not(:disabled){background:var(--soft);color:var(--accent)}
.text-button{background:transparent;color:var(--accent);padding:6px 0;font-size:12px}
.muted{color:var(--muted)}
.eyebrow{font-size:12px;color:var(--muted);letter-spacing:.04em;margin-bottom:12px}
.hint{font-size:11px;color:var(--muted);line-height:1.8;margin:7px 0 0}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:11px;font-size:23px;font-weight:650;letter-spacing:-.045em}
.brand-mark{position:relative;display:inline-flex;align-items:center;justify-content:center;width:33px;height:34px;font-size:24px;font-weight:900;line-height:1;background:var(--yellow);border:2px solid var(--ink);transform:rotate(-7deg);color:var(--ink)}
.brand-dot{display:none}

/* ============ 落地页 ============ */
.site-header{height:88px;display:flex;align-items:center;justify-content:space-between;gap:25px;max-width:1440px;margin:auto;padding:0 64px;border-bottom:2px solid var(--ink)}
.site-header nav{display:flex;gap:32px;color:var(--muted);font-size:13px}
.site-header nav a:hover{color:var(--accent)}
.header-cta{min-height:38px;padding:9px 16px;font-size:12px;box-shadow:3px 3px 0 var(--ink);border:2px solid var(--ink)}
.landing-main{max-width:1440px;margin:auto}
.hero{position:relative;display:grid;grid-template-columns:1.05fr 1fr;gap:40px;padding:55px 64px 0}
.hero-copy{grid-column:1;grid-row:1;position:relative;z-index:1}
.hero-intro{font-weight:600;color:var(--ink);font-size:13px;margin-bottom:22px}
.hero h1{font-family:var(--display);font-size:70px;line-height:1.25;font-weight:900;letter-spacing:-.065em;margin-bottom:20px}
.hero-description{color:var(--muted);font-size:14px;line-height:2;margin-bottom:28px}
.hero-actions{display:flex;gap:12px}
.hero-actions .primary{box-shadow:4px 4px 0 var(--ink);border:2px solid var(--ink)}
.hero-actions .secondary{border:0;padding:13px 12px;font-weight:400}
.hero-limits{font-size:11px;color:var(--muted);margin:16px 0 0}
.hero-visual{grid-column:2;grid-row:1;min-width:0;margin-top:0;align-self:stretch}

/* 立体纸张场景 */
.sculpt-scene{position:relative;min-height:450px;background:var(--yellow);border:2px solid var(--ink);overflow:hidden}
.scene-circle{position:absolute;width:300px;height:300px;top:72px;left:55px;border-radius:50%;border:1px solid #23232335}
.paper-stack{position:absolute;left:50%;top:50%;width:205px;height:285px;transform:translate(-50%,-50%) rotateX(12deg) rotateY(-16deg) rotateZ(-9deg);transform-style:preserve-3d;perspective:800px}
.stack-sheet{position:absolute;inset:0;background:#fff;border:1px solid #282828;box-shadow:3px 5px 0 #2323230f}
.stack-sheet.back{transform:translate(28px,16px) rotate(9deg);animation:stack-back 1.5s ease both}
.stack-sheet.middle{transform:translate(14px,8px) rotate(4deg);animation:stack-middle 1.5s ease both}
.paper-stack>.mini-paper{position:absolute;width:205px;height:285px;padding:27px 25px;border:1px solid var(--ink);transform:rotate(-3deg);box-shadow:0 15px 20px #23232320;animation:stack-front 1.5s ease both;overflow:hidden}
.paper-stack>.mini-paper>b{font-size:14px}
.paper-stack .tiny-subheading{font-size:9px}
.paper-stack .mini-paper i{margin:7px 0}
.paper-stack .tiny-figure{height:43px}
.sculpt-stamp{position:absolute;right:17px;top:18px;width:76px;height:76px;border:1px solid var(--ink);border-radius:50%;display:flex;align-items:center;justify-content:center;text-align:center;font-size:12px;line-height:1.6;transform:rotate(12deg);background:var(--yellow)}
.scene-caption{position:absolute;bottom:22px;left:23px;font-size:10px}
#replay{position:absolute;bottom:16px;right:15px;font-size:9px;min-height:28px;padding:6px;border-color:#23232340;color:#232323}
.paper-stack.replaying .back{animation:stack-back-replay 1.5s ease both}
.paper-stack.replaying .middle{animation:stack-middle-replay 1.5s ease both}
.paper-stack.replaying .front{animation:stack-front-replay 1.5s ease both}

/* 迷你论文页 */
.mini-paper{position:relative;width:173px;height:240px;background:#fff;color:#28303a;padding:23px 20px 16px;border:1px solid #e1e4e1;box-shadow:0 12px 28px #172b4d0b;font-family:"SimSun","Songti SC",serif;text-align:left;overflow:hidden}
.tiny-header{display:block;font-size:6px;border-bottom:1px solid #bdc5c7;padding-bottom:6px;margin-bottom:10px;color:#778285;text-align:center}
.mini-paper>b{display:block;font-size:12px;text-align:center;line-height:1.7;margin-bottom:13px}
.tiny-subheading{display:block;font-size:7px;font-weight:bold;margin:10px 0 5px}
.mini-paper i{display:block;background:#cfd5d4;height:3px;margin:5px 0}
.mini-paper i.short{width:63%}
.tiny-figure{display:flex;align-items:flex-end;justify-content:center;gap:8px;height:32px;border-bottom:1px solid #bfc8c4;margin:12px 0 5px}
.tiny-figure span{width:11px;background:#8aa89a;height:16px}
.tiny-figure span:nth-child(2){height:26px}
.tiny-figure span:nth-child(3){height:21px}
.tiny-figure span:nth-child(4){height:30px}
.mini-paper small{display:block;text-align:center;font-size:5px}
.mini-paper em{position:absolute;bottom:9px;left:0;width:100%;text-align:center;font-size:7px;font-style:normal}

/* 登录 / 注册面板 */
.auth-panel{grid-column:1 / -1;grid-row:2;display:grid;grid-template-columns:280px 1fr;gap:0 45px;border-top:2px solid var(--ink);padding:36px 0;margin-top:22px;align-self:auto}
.auth-heading{grid-row:1 / span 2}
.auth-heading h2{font-size:27px;line-height:1.4;max-width:200px;font-weight:750;margin-bottom:8px}
.auth-heading p{font-size:12px;color:var(--muted);margin-bottom:24px}
.auth-tabs{grid-column:2;display:flex;border-bottom:1px solid var(--line);gap:25px;margin-bottom:20px;max-width:200px}
.auth-tabs .secondary{border:0;border-radius:0;min-height:35px;padding:8px 3px;background:transparent;color:var(--muted);font-size:13px}
.auth-tabs .secondary[aria-pressed=true]{color:var(--accent);border-bottom:2px solid var(--accent)}
#connect{grid-column:2;display:grid;grid-template-columns:1fr 1fr;gap:8px 20px}
#connect>label{margin:0;align-self:end}
#connect>label[for=username]{grid-column:1;grid-row:1}
#connect>#username{grid-column:1;grid-row:2}
#connect>#account-hint{grid-column:1;grid-row:3;margin:0}
#connect>label[for=password]{grid-column:2;grid-row:1}
#connect>#password{grid-column:2;grid-row:2}
#connect>#confirm-field{grid-column:1;grid-row:4}
#connect>#confirm-field>label{margin-bottom:8px}
#connect>#auth-submit{grid-column:2;grid-row:4 / span 2;min-height:45px;align-self:end}
#connect>#auth-hint{grid-column:2;margin:14px 0 0}

/* 表单控件 */
label{display:block;font-size:12px;font-weight:500;margin-bottom:8px}
input:not([type=file]),select,textarea{width:100%;padding:12px 13px;min-height:43px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);color:var(--ink)}
input::placeholder{color:var(--muted);opacity:.65}
input:focus,select:focus,textarea:focus{border-color:var(--accent)}
textarea{font-family:Consolas,monospace;line-height:1.8;font-size:12px;resize:vertical}

/* 落地页区块 */
.capabilities{border-top:2px solid var(--ink);padding:64px}
.section-heading{display:grid;grid-template-columns:1fr 1fr;align-items:end;margin-bottom:38px}
.section-heading>p{grid-column:1 / -1;font-size:12px;color:var(--accent);margin-bottom:15px}
.section-heading h2{font-family:var(--display);font-size:38px;font-weight:750;line-height:1.4;margin:0}
.section-heading>span{font-size:12px;color:var(--muted);text-align:right;padding-bottom:7px}
.capability-list{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:2px solid var(--ink)}
.capability-list article{padding:28px;border-right:2px solid var(--ink)}
.capability-list article:last-child{border-right:0}
.capability-list article:nth-child(2){background:var(--accent);color:#fff}
.capability-list article:nth-child(2) p,.capability-list article:nth-child(2)>.icon,.capability-list article:nth-child(2)>span{color:#d7dfff}
.capability-list article>.icon{width:26px;height:26px;color:var(--accent);margin-bottom:21px}
.capability-list h3{font-size:18px;margin-bottom:12px}
.capability-list p{font-size:12px;color:var(--muted);max-width:320px;margin-bottom:20px}
.capability-list article>span{font-size:10px;color:var(--accent)}
.how-it-works{padding:52px 64px;background:var(--yellow);color:var(--ink);border-top:2px solid var(--ink);border-bottom:2px solid var(--ink);display:grid;grid-template-columns:1fr 1.35fr;gap:55px}
.how-it-works h2{font-family:var(--display);font-size:28px;font-weight:750;line-height:1.5}
.how-it-works .eyebrow,.how-it-works li p{color:var(--yellow-ink)}
.how-it-works ol{padding:0;margin:0;list-style:none;display:flex;gap:30px}
.how-it-works li{flex:1}
.how-it-works li>span{display:inline-flex;width:30px;height:30px;align-items:center;justify-content:center;border:1px solid var(--ink);border-radius:50%;background:#fff;color:var(--ink);font-family:Georgia,serif;margin-bottom:17px}
.how-it-works li h3{font-size:14px;margin-bottom:8px}
.how-it-works li p{font-size:11px;margin:0}
.questions{display:grid;grid-template-columns:1fr 1.35fr;gap:55px;padding:64px}
.questions h2{font-family:var(--display);font-size:32px;line-height:1.4}
.faq-list details{border-bottom:1px solid var(--line);padding:18px 0}
.faq-list details:first-child{border-top:1px solid var(--line)}
.faq-list summary{cursor:pointer;list-style:none;font-weight:500;display:flex;justify-content:space-between;gap:20px}
.faq-list summary:after{content:'+';color:var(--muted);font-size:18px}
.faq-list details[open] summary:after{content:'−'}
.faq-list p{color:var(--muted);font-size:12px;padding-right:20px;margin:15px 0 0}
.site-footer{max-width:1440px;margin:auto;border-top:2px solid var(--ink);padding:30px 64px;display:flex;align-items:center;gap:50px}
.site-footer .brand{font-size:18px}
.site-footer .brand-mark{font-size:20px;width:25px;height:25px;border-width:2px}
.site-footer>span{font-size:11px;color:var(--muted)}
.site-footer>span:last-child{margin-left:auto}

/* ============ 工作台 ============ */
.workspace-shell{min-height:100vh}
.workspace-header{height:80px;display:flex;align-items:center;gap:30px;padding:0 34px;border-bottom:2px solid var(--ink);background:var(--surface)}
.workspace-edition{font-size:12px;color:var(--muted);border-left:1px solid var(--line);padding-left:25px}
.workspace-account{display:flex;align-items:center;gap:13px;margin-left:auto}
.workspace-account .secondary{min-height:34px;padding:7px 12px;font-size:11px}
.account-avatar{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:var(--soft);color:var(--accent);font-size:12px}
.account-name{font-size:12px;color:var(--muted)}
.credit{display:inline-flex;align-items:center;gap:7px;padding:7px 11px;font-size:10px;background:var(--yellow);color:#635218;border:1px solid var(--ink);border-radius:4px;white-space:nowrap}
.credit:empty{display:none}
.workspace-main{padding:32px 45px 0;max-width:1440px;margin:auto}
.workspace-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:27px}
.workspace-heading .eyebrow{margin-bottom:9px}
.workspace-heading h1{font-size:37px;font-weight:850;letter-spacing:-.04em;margin:0;line-height:1.5}
.workspace-heading-note{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:10px;line-height:1.8}
.workspace-heading-note>.icon{width:24px;height:24px}
.workspace-desk{display:grid;grid-template-columns:360px minmax(0,1fr);gap:26px;align-items:stretch}

/* 处理表单 */
.settings-panel{border:2px solid var(--ink);border-radius:var(--radius);padding:25px;background:var(--surface)}
.panel-heading .eyebrow{font-size:10px;margin-bottom:8px}
.panel-heading h2{font-size:21px;margin-bottom:9px}
.panel-heading>p{font-size:11px;color:var(--muted);margin-bottom:23px}
.upload-area{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;min-height:170px;text-align:center;cursor:pointer;border:1px solid var(--ink);background:var(--yellow);color:var(--ink);border-radius:var(--radius);padding:20px 12px;margin-bottom:0;transition:filter .15s}
.upload-area:hover,.upload-area[data-drag-over=true]{filter:brightness(.97)}
.upload-icon{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:transparent;color:var(--ink);border:1px solid var(--ink);margin-bottom:4px}
.upload-icon .icon{width:21px;height:21px}
.upload-area strong{font-size:12px;font-weight:550;overflow-wrap:anywhere;max-width:100%}
.upload-area>span:not(.upload-icon),.upload-area small{font-size:9px;color:var(--yellow-ink)}
#process>label{margin-top:19px}
#process>.upload-area{margin-top:0}
.cover-upload{padding:12px;margin-top:15px;border:1px solid var(--line);border-radius:var(--radius)}
.cover-upload label{font-size:10px}
.cover-upload input{font-size:10px;max-width:100%}
#settings{margin-top:21px;border-top:1px solid var(--line);padding-top:16px}
#settings>summary{cursor:pointer;color:var(--accent);font-size:12px;list-style:none;display:flex;align-items:center;gap:8px}
#settings>summary:before{content:'+';font-size:15px;color:var(--muted)}
#settings[open]>summary:before{content:'−'}
#settings>label{margin-top:14px}
.config-help{font-size:10px;color:var(--muted);margin:10px 0 6px;line-height:1.8}
.config-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px}
.config-actions .secondary{min-height:34px;font-size:11px;padding:8px 13px}
.file-button{position:relative;cursor:pointer;margin:0}
.processing-action{border-top:1px solid var(--line);padding-top:18px;margin-top:18px}
.processing-action .primary{font-size:12px;padding:12px;min-height:43px}
.processing-action small{display:block;font-size:9px;color:var(--muted);margin-top:10px;text-align:center;line-height:1.8}

/* 预览面板 */
.reader-panel{min-width:0;background:var(--surface);border:2px solid var(--ink);border-radius:var(--radius);overflow:hidden}
.reader-panel:has(#preview:not([hidden])){display:flex;flex-direction:column;height:calc(100dvh - 32px);scroll-margin-top:16px}
.reader-toolbar,.reader-file,.reader-bottom,.reader-disclaimer{flex-shrink:0}
#preview:not([hidden]){display:flex;flex-direction:column;flex:1;min-height:0}
.reader-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;min-height:57px;padding:13px 20px;border-bottom:1px solid var(--ink)}
.reader-toolbar>div{display:flex;align-items:center;gap:9px}
.reader-toolbar>div>.icon{width:17px;height:17px;color:var(--muted)}
.reader-toolbar h2{font-size:13px;letter-spacing:0;margin:0}
.reader-toolbar .secondary{min-height:32px;padding:6px 11px;font-size:11px}
.reader-placeholder-label{font-size:10px;color:var(--muted)}
.reader-file{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 20px;border-bottom:1px solid var(--line);font-size:10px;color:var(--muted)}
.reader-file>span:first-child{min-width:0;overflow-wrap:anywhere;font-weight:550;color:var(--ink)}
.reader-file>span:last-child{white-space:nowrap;font-size:9px}
.reader-canvas{padding:16px;background:#eceef3;flex:1;min-height:0;overflow:hidden;display:flex;align-items:center;justify-content:center}
.preview-sheet img{width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;background:#fff;box-shadow:0 4px 18px #20272426;user-select:none}
.preview-sheet.is-zoomed{overflow:auto;align-items:flex-start;justify-content:flex-start}
.preview-sheet.is-zoomed img{max-width:none;max-height:none;flex-shrink:0;margin:0 auto}
.reader-toolbar>.reader-actions{gap:8px}
.reader-canvas[aria-busy=true]{opacity:.6}
.reader-bottom{display:flex;align-items:center;justify-content:center;gap:23px;padding:12px 18px;border-top:1px solid var(--line);background:var(--surface)}
#page-jump{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--muted)}
#page-jump label{margin:0;font-size:11px}
#page-jump input{width:52px;min-height:31px;padding:5px;text-align:center;font-size:11px}
#page-counter{min-width:64px;text-align:center}
.reader-disclaimer{display:flex;align-items:flex-start;gap:7px;color:var(--muted);font-size:9px;padding:13px 20px;border-top:1px solid var(--line);margin:0;line-height:1.8}
.reader-disclaimer .icon{width:12px;height:12px;margin-top:2px}
.reader-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:556px;padding:40px 20px;text-align:center;background:var(--surface)}
.reader-empty h3{font-size:18px;line-height:1.6;margin:25px 0 12px;letter-spacing:-.04em}
.reader-empty>p{color:var(--muted);font-size:12px;line-height:1.9;margin:0 0 20px}
.empty-illustration{position:relative;margin:0 0 8px}
.empty-illustration .mini-paper{width:120px;height:171px;padding:17px;border-color:var(--line);transform:rotate(-5deg);opacity:.55}
.empty-illustration .mini-paper>b{font-size:8px}
.empty-illustration .tiny-header{font-size:5px}
.empty-illustration .mini-paper i{height:2px;margin:4px 0}
.empty-illustration .tiny-figure{height:21px;margin-top:8px}
.empty-illustration .tiny-subheading{font-size:5px}
.empty-illustration>span{position:absolute;right:-16px;bottom:16px;width:41px;height:41px;border-radius:50%;background:var(--soft);color:var(--accent);display:flex;align-items:center;justify-content:center;border:1px solid var(--line)}
.empty-checks{display:flex;gap:19px;margin-top:12px}
.empty-checks>span{display:flex;align-items:center;gap:5px;font-size:9px;color:var(--muted)}
.empty-checks .icon{color:var(--accent);width:12px;height:12px}

/* 处理记录 */
.history-panel{border:2px solid var(--ink);border-radius:var(--radius);padding:27px;background:var(--surface);margin-top:26px}
.history-heading{display:flex;justify-content:space-between;align-items:center;gap:20px}
.history-heading h2{font-size:23px;margin:0}
.history-heading .eyebrow{font-size:10px;margin-bottom:6px}
.history-heading .secondary{font-size:10px;min-height:31px;padding:7px 10px}
.history-note{font-size:10px;color:var(--muted);margin:15px 0 23px}
.job{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px;align-items:center;padding:20px 15px;border-bottom:1px solid var(--line)}
.job:first-child{border-top:1px solid var(--line)}
.job h3{margin:0 0 8px;font-size:14px;font-weight:550;overflow-wrap:anywhere}
.job p{margin:3px 0;font-size:11px;color:var(--muted)}
.job-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.job-actions button{font-size:11px;min-height:32px;padding:7px 10px}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:10px;color:var(--accent);margin-left:10px;font-weight:400}
.badge:before{content:'';width:5px;height:5px;background:currentColor;border-radius:50%}
.empty{padding:45px 15px;text-align:center;border:1px dashed var(--line);border-radius:var(--radius);color:var(--muted);font-size:12px}

/* 管理后台 */
.admin-panel h3{font-size:16px;margin:28px 0 14px}
.admin-users{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.admin-user{border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;background:var(--surface)}
.admin-user h4{margin:0 0 6px;font-size:13px;overflow-wrap:anywhere}
.admin-user p{margin:0;font-size:10px;color:var(--muted);line-height:1.7}
.admin-filter{max-width:260px;margin:22px 0 0}
.admin-config{margin-top:22px}
.admin-config textarea{min-height:280px}

/* 通知 */
#notice:not(:empty){position:sticky;bottom:20px;max-width:720px;margin:20px auto;padding:16px 20px;background:#fff2d8;border:2px solid var(--ink);border-radius:var(--radius);box-shadow:4px 4px 0 var(--ink);font-size:12px;overflow-wrap:anywhere;z-index:50}

.workspace-footer{display:flex;justify-content:space-between;gap:20px;padding:28px 0;color:var(--muted);font-size:9px}

/* 动画 */
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes indeterminate{from{transform:translateX(-100%)}to{transform:translateX(390%)}}
@keyframes stack-back{from{transform:translate(50px,20px) rotate(19deg)}to{transform:translate(28px,16px) rotate(9deg)}}
@keyframes stack-middle{from{transform:translate(-28px,-15px) rotate(-14deg)}to{transform:translate(14px,8px) rotate(4deg)}}
@keyframes stack-front{from{transform:rotate(-10deg) translateY(-20px)}to{transform:rotate(-3deg)}}
@keyframes stack-back-replay{from{transform:translate(50px,20px) rotate(19deg)}to{transform:translate(28px,16px) rotate(9deg)}}
@keyframes stack-middle-replay{from{transform:translate(-28px,-15px) rotate(-14deg)}to{transform:translate(14px,8px) rotate(4deg)}}
@keyframes stack-front-replay{from{transform:rotate(-10deg) translateY(-20px)}to{transform:rotate(-3deg)}}

/* 带水印预览禁止打印（沿用原有保护） */
@media print{body{display:none!important}}

/* ============ 响应式 ============ */
@media(min-width:801px){
  .workspace-desk:has(#preview:not([hidden])){height:calc(100dvh - 32px)}
  .workspace-desk:has(#preview:not([hidden]))>.settings-panel{min-height:0;overflow:auto}
}
@media(max-width:1180px){
  .site-header{padding:0 38px}
  .hero{grid-template-columns:1fr 1fr;padding:45px 38px 0;gap:30px}
  .hero h1{font-size:54px}
  .hero-description{font-size:12px}
  .auth-panel{grid-template-columns:225px 1fr;gap:0 30px}
  .sculpt-scene{min-height:416px}
  .capabilities,.questions{padding:45px 38px}
  .how-it-works{padding:40px 38px;gap:35px;grid-template-columns:1fr 1.6fr}
  .how-it-works ol{gap:20px}
  .section-heading h2{font-size:29px}
  .site-footer{padding:25px 38px}
  .workspace-header{padding:0 25px;gap:20px}
  .workspace-header .brand{font-size:21px}
  .account-name{display:none}
  .workspace-main{padding:28px 30px 0}
  .workspace-desk{grid-template-columns:300px minmax(0,1fr);gap:22px}
  .reader-canvas{padding:22px}
  .reader-file>span:last-child{display:none}
  .empty-checks{gap:10px}
  .reader-empty h3{font-size:16px}
}
@media(max-width:800px){
  .site-header{height:75px;padding:0 22px;gap:10px}
  .site-header nav{display:none}
  .brand{font-size:21px}
  .header-cta{font-size:10px;padding:9px 11px;min-height:34px}
  .header-cta .icon{width:14px;height:14px}
  .hero{display:flex;flex-direction:column;padding:37px 23px 36px;gap:0}
  .hero h1{font-size:44px;line-height:1.28;margin-bottom:21px}
  .hero-intro{font-size:11px;margin-bottom:18px}
  .hero-description{font-size:12px;line-height:1.95}
  .hero-actions{gap:10px}
  .hero-actions .primary,.hero-actions .secondary{font-size:12px;padding:11px 16px;min-height:42px}
  .hero-limits{font-size:10px;line-height:1.8}
  .hero-visual{margin-top:30px;margin-bottom:32px;width:100%}
  .auth-panel{display:block;border:2px solid var(--ink);border-radius:var(--radius);padding:26px;margin-top:0;background:var(--surface)}
  .auth-heading h2{font-size:22px;max-width:none}
  .auth-heading h2 br{display:none}
  .auth-tabs{max-width:none}
  #connect{display:block}
  #connect>label{margin:18px 0 8px}
  #connect>label[for=username]{margin-top:0}
  #connect>#account-hint{margin:7px 0 0}
  #connect>#confirm-field{margin-top:4px}
  #connect>#auth-submit{width:100%;margin-top:18px}
  #connect>#auth-hint{margin:14px 0 0}
  .sculpt-scene{min-height:350px}
  .paper-stack{scale:.88;transform-origin:0 0}
  .scene-circle{width:240px;height:240px;left:calc(50% - 120px);top:55px}
  .sculpt-stamp{width:60px;height:60px;font-size:10px}
  .scene-caption{font-size:8px;left:14px;bottom:17px}
  #replay{font-size:8px;right:8px;bottom:10px}
  .capabilities{padding:40px 23px}
  .section-heading{display:block;margin-bottom:28px}
  .section-heading h2{font-size:29px;line-height:1.45}
  .section-heading>span{display:block;text-align:left;font-size:11px;margin-top:17px;line-height:1.8}
  .capability-list{display:flex;flex-direction:column;gap:0}
  .capability-list article{border-right:0;border-bottom:2px solid var(--ink);padding:25px}
  .capability-list article:last-child{border-bottom:0}
  .capability-list article>.icon{width:23px;height:23px;margin-bottom:13px}
  .capability-list p{max-width:none}
  .how-it-works{display:block;padding:35px 23px}
  .how-it-works h2{font-size:24px;margin-bottom:25px}
  .how-it-works ol{display:flex;flex-direction:column;gap:20px}
  .how-it-works li{display:flex;gap:16px;align-items:flex-start}
  .how-it-works li>span{flex-shrink:0;margin:0}
  .how-it-works li p{font-size:11px}
  .questions{display:block;padding:40px 23px}
  .questions h2{font-size:29px;margin-bottom:30px}
  .faq-list summary{font-size:13px}
  .faq-list p{font-size:11px}
  .site-footer{padding:25px 23px;gap:15px;flex-wrap:wrap}
  .site-footer>span:last-child{width:100%;margin:0;font-size:10px}
  .workspace-header{height:auto;min-height:84px;padding:15px 20px;gap:12px;flex-wrap:wrap}
  .workspace-header .brand{font-size:20px}
  .workspace-header .brand-mark{width:28px;height:29px;font-size:20px}
  .workspace-edition{display:none}
  .workspace-account{gap:8px}
  .workspace-account .account-avatar{display:none}
  .credit{font-size:8px;padding:6px 8px}
  .workspace-main{margin-left:0;padding:26px 18px 0}
  .workspace-heading{margin-bottom:24px}
  .workspace-heading-note{display:none}
  .workspace-heading h1{font-size:27px}
  .workspace-heading .eyebrow{font-size:10px}
  .workspace-desk{display:flex;flex-direction:column;gap:22px}
  .settings-panel{width:100%;padding:24px}
  .panel-heading>p{font-size:11px}
  .upload-area{min-height:165px}
  .upload-area strong{font-size:13px}
  .upload-area>span:not(.upload-icon),.upload-area small{font-size:10px}
  #process>label{font-size:12px}
  #process>select{font-size:13px;min-height:45px}
  .config-help{font-size:11px}
  .config-actions{align-items:flex-start;flex-direction:column}
  .processing-action .primary{font-size:13px;min-height:45px}
  .processing-action small{font-size:10px}
  .reader-panel{width:100%}
  .reader-toolbar{padding:12px 15px}
  .reader-toolbar h2{font-size:12px;white-space:nowrap}
  .reader-file{padding:12px 15px;font-size:9px}
  .reader-canvas{padding:12px}
  .reader-bottom{gap:15px}
  .reader-disclaimer{font-size:9px;padding:13px 15px}
  .reader-empty{min-height:430px;padding:30px 17px}
  .reader-empty h3{font-size:16px}
  .reader-empty>p{font-size:11px}
  .empty-checks{gap:10px;flex-wrap:wrap;justify-content:center}
  .empty-checks>span{font-size:9px}
  .history-panel{padding:23px 18px;width:100%}
  .history-heading h2{font-size:20px}
  .history-note{font-size:9px}
  .job{grid-template-columns:1fr;padding:18px 0}
  .job-actions{justify-content:flex-start}
  .admin-users{grid-template-columns:1fr}
  .admin-filter{max-width:none}
  .workspace-footer{font-size:8px;gap:10px;padding:24px 0}
  #notice:not(:empty){margin:14px 18px}
}
@media(prefers-reduced-motion:reduce){
  *,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .paper-stack{transform:translate(-50%,-50%) rotate(-9deg)}
}